enet.h 176 KB

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  1. /*
  2. * Custom fork of ENet reliable UDP networking library
  3. * Copyright (c) 2019-2020 Matt Coburn, Chris Burns, 2018 Lee Salzman, Vladyslav Hrytsenko, Dominik Madarász, Stanislav Denisov
  4. *
  5. * Permission is hereby granted, free of charge, to any person obtaining a copy
  6. * of this software and associated documentation files (the "Software"), to deal
  7. * in the Software without restriction, including without limitation the rights
  8. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  9. * copies of the Software, and to permit persons to whom the Software is
  10. * furnished to do so, subject to the following conditions:
  11. *
  12. * The above copyright notice and this permission notice shall be included in all
  13. * copies or substantial portions of the Software.
  14. *
  15. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21. * SOFTWARE.
  22. */
  23. #ifndef ENET_H
  24. #define ENET_H
  25. #include <stdlib.h>
  26. #include <stdbool.h>
  27. #include <stdint.h>
  28. #include <time.h>
  29. #include "custom/enet_logging.h"
  30. #if __APPLE__ && (__MAC_OS_X_VERSION_MIN_REQUIRED < 101200 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000)
  31. #include "custom/enet_iosFixes.h"
  32. #endif
  33. #define ENET_VERSION_MAJOR 2
  34. #define ENET_VERSION_MINOR 4
  35. #define ENET_VERSION_PATCH 3
  36. #define ENET_VERSION_CREATE(major, minor, patch) (((major) << 16) | ((minor) << 8) | (patch))
  37. #define ENET_VERSION_GET_MAJOR(version) (((version) >> 16) & 0xFF)
  38. #define ENET_VERSION_GET_MINOR(version) (((version) >> 8) & 0xFF)
  39. #define ENET_VERSION_GET_PATCH(version) ((version) & 0xFF)
  40. #define ENET_VERSION ENET_VERSION_CREATE(ENET_VERSION_MAJOR, ENET_VERSION_MINOR, ENET_VERSION_PATCH)
  41. #define ENET_TIME_OVERFLOW 86400000
  42. #define ENET_TIME_LESS(a, b) ((a) - (b) >= ENET_TIME_OVERFLOW)
  43. #define ENET_TIME_GREATER(a, b) ((b) - (a) >= ENET_TIME_OVERFLOW)
  44. #define ENET_TIME_LESS_EQUAL(a, b) (!ENET_TIME_GREATER(a, b))
  45. #define ENET_TIME_GREATER_EQUAL(a, b) (!ENET_TIME_LESS(a, b))
  46. #define ENET_TIME_DIFFERENCE(a, b) ((a) - (b) >= ENET_TIME_OVERFLOW ? (b) - (a) : (a) - (b))
  47. #define ENET_MAX(x, y) ((x) > (y) ? (x) : (y))
  48. #define ENET_MIN(x, y) ((x) < (y) ? (x) : (y))
  49. /*
  50. =======================================================================
  51. System differences
  52. =======================================================================
  53. */
  54. #ifdef _WIN32
  55. #ifndef ENET_NO_PRAGMA_LINK
  56. #pragma comment(lib, "ws2_32.lib")
  57. #pragma comment(lib, "winmm.lib")
  58. #endif
  59. #if _MSC_VER >= 1910
  60. /* It looks like there were changes as of Visual Studio 2017 and there are no 32/64 bit
  61. versions of _InterlockedExchange[operation], only InterlockedExchange[operation]
  62. (without leading underscore), so we have to distinguish between compiler versions */
  63. #define ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  64. #endif
  65. #include <winsock2.h>
  66. #include <ws2tcpip.h>
  67. #include <mmsystem.h>
  68. #include <intrin.h>
  69. #if defined(_WIN32) && defined(_MSC_VER)
  70. #if _MSC_VER < 1900
  71. typedef struct timespec {
  72. long tv_sec;
  73. long tv_nsec;
  74. };
  75. #endif
  76. #define CLOCK_MONOTONIC 0
  77. #endif
  78. typedef SOCKET ENetSocket;
  79. #define ENET_SOCKET_NULL INVALID_SOCKET
  80. typedef struct {
  81. size_t dataLength;
  82. void* data;
  83. } ENetBuffer;
  84. #define ENET_CALLBACK __cdecl
  85. #ifdef ENET_DLL
  86. #ifdef ENET_IMPLEMENTATION
  87. #define ENET_API __declspec(dllexport)
  88. #else
  89. #define ENET_API __declspec(dllimport)
  90. #endif
  91. #else
  92. #define ENET_API extern
  93. #endif
  94. #else
  95. #include <sys/types.h>
  96. #include <sys/ioctl.h>
  97. #include <sys/time.h>
  98. #include <sys/socket.h>
  99. #include <poll.h>
  100. #include <arpa/inet.h>
  101. #include <netinet/in.h>
  102. #include <netinet/tcp.h>
  103. #include <netdb.h>
  104. #include <unistd.h>
  105. #include <string.h>
  106. #include <errno.h>
  107. #include <fcntl.h>
  108. #ifdef __APPLE__
  109. #include <mach/clock.h>
  110. #include <mach/mach.h>
  111. #include <Availability.h>
  112. #endif
  113. #ifndef MSG_NOSIGNAL
  114. #define MSG_NOSIGNAL 0
  115. #endif
  116. #ifdef MSG_MAXIOVLEN
  117. #define ENET_BUFFER_MAXIMUM MSG_MAXIOVLEN
  118. #endif
  119. typedef int ENetSocket;
  120. #define ENET_SOCKET_NULL -1
  121. typedef struct {
  122. void* data;
  123. size_t dataLength;
  124. } ENetBuffer;
  125. #define ENET_CALLBACK
  126. #define ENET_API extern
  127. #endif
  128. #ifndef ENET_BUFFER_MAXIMUM
  129. #define ENET_BUFFER_MAXIMUM (1 + 2 * ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS)
  130. #endif
  131. #define ENET_HOST_ANY in6addr_any
  132. #define ENET_PORT_ANY 0
  133. #define ENET_HOST_SIZE 1025
  134. #define ENET_HOST_TO_NET_16(value) (htons(value))
  135. #define ENET_HOST_TO_NET_32(value) (htonl(value))
  136. #define ENET_NET_TO_HOST_16(value) (ntohs(value))
  137. #define ENET_NET_TO_HOST_32(value) (ntohl(value))
  138. #if __BIG_ENDIAN__
  139. #define ENET_HOST_TO_NET_64(x) (x)
  140. #define ENET_NET_TO_HOST_64(x) (x)
  141. #else
  142. #define ENET_HOST_TO_NET_64(x) (((uint64_t)htonl((x) & 0xFFFFFFFF) << 32) | htonl((x) >> 32))
  143. #define ENET_NET_TO_HOST_64(x) (((uint64_t)ntohl((x) & 0xFFFFFFFF) << 32) | ntohl((x) >> 32))
  144. #endif
  145. #ifdef __cplusplus
  146. extern "C" {
  147. #endif
  148. /*
  149. =======================================================================
  150. Internals
  151. =======================================================================
  152. */
  153. typedef uint32_t ENetVersion;
  154. typedef fd_set ENetSocketSet;
  155. typedef struct _ENetCallbacks {
  156. void* (ENET_CALLBACK* malloc)(size_t size);
  157. void (ENET_CALLBACK* free)(void* memory);
  158. void (ENET_CALLBACK* noMemory)(void);
  159. } ENetCallbacks;
  160. extern void* enet_malloc(size_t);
  161. extern void enet_free(void*);
  162. typedef struct _ENetListNode {
  163. struct _ENetListNode* next;
  164. struct _ENetListNode* previous;
  165. } ENetListNode;
  166. typedef ENetListNode* ENetListIterator;
  167. typedef struct _ENetList {
  168. ENetListNode sentinel;
  169. } ENetList;
  170. extern ENetListIterator enet_list_insert(ENetListIterator, void*);
  171. extern ENetListIterator enet_list_move(ENetListIterator, void*, void*);
  172. extern void* enet_list_remove(ENetListIterator);
  173. extern void enet_list_clear(ENetList*);
  174. extern size_t enet_list_size(ENetList*);
  175. #define enet_list_begin(list) ((list)->sentinel.next)
  176. #define enet_list_end(list) (&(list)->sentinel)
  177. #define enet_list_empty(list) (enet_list_begin(list) == enet_list_end(list))
  178. #define enet_list_next(iterator) ((iterator)->next)
  179. #define enet_list_previous(iterator) ((iterator)->previous)
  180. #define enet_list_front(list) ((void*)(list)->sentinel.next)
  181. #define enet_list_back(list) ((void*)(list)->sentinel.previous)
  182. #define enet_in6_equal(a, b) (memcmp(&a, &b, sizeof(struct in6_addr)) == 0)
  183. /*
  184. =======================================================================
  185. Protocol
  186. =======================================================================
  187. */
  188. enum {
  189. ENET_PROTOCOL_MINIMUM_MTU = 576,
  190. ENET_PROTOCOL_MAXIMUM_MTU = 4096,
  191. ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS = 32,
  192. ENET_PROTOCOL_MINIMUM_WINDOW_SIZE = 4096,
  193. ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE = 65536,
  194. ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT = 1,
  195. ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT = 255,
  196. ENET_PROTOCOL_MAXIMUM_PEER_ID = 0xFFF,
  197. ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT = 1024 * 1024
  198. };
  199. typedef enum _ENetProtocolCommand {
  200. ENET_PROTOCOL_COMMAND_NONE = 0,
  201. ENET_PROTOCOL_COMMAND_ACKNOWLEDGE = 1,
  202. ENET_PROTOCOL_COMMAND_CONNECT = 2,
  203. ENET_PROTOCOL_COMMAND_VERIFY_CONNECT = 3,
  204. ENET_PROTOCOL_COMMAND_DISCONNECT = 4,
  205. ENET_PROTOCOL_COMMAND_PING = 5,
  206. ENET_PROTOCOL_COMMAND_SEND_RELIABLE = 6,
  207. ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE = 7,
  208. ENET_PROTOCOL_COMMAND_SEND_FRAGMENT = 8,
  209. ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED = 9,
  210. ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT = 10,
  211. ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE = 11,
  212. ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT = 12,
  213. ENET_PROTOCOL_COMMAND_COUNT = 13,
  214. ENET_PROTOCOL_COMMAND_MASK = 0x0F
  215. } ENetProtocolCommand;
  216. typedef enum _ENetProtocolFlag {
  217. ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE = (1 << 7),
  218. ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED = (1 << 6),
  219. ENET_PROTOCOL_HEADER_FLAG_SENT_TIME = (1 << 14),
  220. ENET_PROTOCOL_HEADER_FLAG_MASK = ENET_PROTOCOL_HEADER_FLAG_SENT_TIME,
  221. ENET_PROTOCOL_HEADER_SESSION_MASK = (3 << 12),
  222. ENET_PROTOCOL_HEADER_SESSION_SHIFT = 12
  223. } ENetProtocolFlag;
  224. #ifdef _MSC_VER
  225. #pragma pack(push, 1)
  226. #define ENET_PACKED
  227. #elif defined(__GNUC__) || defined(__clang__)
  228. #define ENET_PACKED __attribute__ ((packed))
  229. #else
  230. #define ENET_PACKED
  231. #endif
  232. typedef struct _ENetProtocolHeader {
  233. uint16_t peerID;
  234. uint16_t sentTime;
  235. } ENET_PACKED ENetProtocolHeader;
  236. typedef struct _ENetProtocolCommandHeader {
  237. uint8_t command;
  238. uint8_t channelID;
  239. uint16_t reliableSequenceNumber;
  240. } ENET_PACKED ENetProtocolCommandHeader;
  241. typedef struct _ENetProtocolAcknowledge {
  242. ENetProtocolCommandHeader header;
  243. uint16_t receivedReliableSequenceNumber;
  244. uint16_t receivedSentTime;
  245. } ENET_PACKED ENetProtocolAcknowledge;
  246. typedef struct _ENetProtocolConnect {
  247. ENetProtocolCommandHeader header;
  248. uint16_t outgoingPeerID;
  249. uint8_t incomingSessionID;
  250. uint8_t outgoingSessionID;
  251. uint32_t mtu;
  252. uint32_t windowSize;
  253. uint32_t channelCount;
  254. uint32_t incomingBandwidth;
  255. uint32_t outgoingBandwidth;
  256. uint32_t packetThrottleInterval;
  257. uint32_t packetThrottleAcceleration;
  258. uint32_t packetThrottleDeceleration;
  259. uint32_t connectID;
  260. uint32_t data;
  261. } ENET_PACKED ENetProtocolConnect;
  262. typedef struct _ENetProtocolVerifyConnect {
  263. ENetProtocolCommandHeader header;
  264. uint16_t outgoingPeerID;
  265. uint8_t incomingSessionID;
  266. uint8_t outgoingSessionID;
  267. uint32_t mtu;
  268. uint32_t windowSize;
  269. uint32_t channelCount;
  270. uint32_t incomingBandwidth;
  271. uint32_t outgoingBandwidth;
  272. uint32_t packetThrottleInterval;
  273. uint32_t packetThrottleAcceleration;
  274. uint32_t packetThrottleDeceleration;
  275. uint32_t connectID;
  276. } ENET_PACKED ENetProtocolVerifyConnect;
  277. typedef struct _ENetProtocolBandwidthLimit {
  278. ENetProtocolCommandHeader header;
  279. uint32_t incomingBandwidth;
  280. uint32_t outgoingBandwidth;
  281. } ENET_PACKED ENetProtocolBandwidthLimit;
  282. typedef struct _ENetProtocolThrottleConfigure {
  283. ENetProtocolCommandHeader header;
  284. uint32_t packetThrottleInterval;
  285. uint32_t packetThrottleAcceleration;
  286. uint32_t packetThrottleDeceleration;
  287. } ENET_PACKED ENetProtocolThrottleConfigure;
  288. typedef struct _ENetProtocolDisconnect {
  289. ENetProtocolCommandHeader header;
  290. uint32_t data;
  291. } ENET_PACKED ENetProtocolDisconnect;
  292. typedef struct _ENetProtocolPing {
  293. ENetProtocolCommandHeader header;
  294. } ENET_PACKED ENetProtocolPing;
  295. typedef struct _ENetProtocolSendReliable {
  296. ENetProtocolCommandHeader header;
  297. uint16_t dataLength;
  298. } ENET_PACKED ENetProtocolSendReliable;
  299. typedef struct _ENetProtocolSendUnreliable {
  300. ENetProtocolCommandHeader header;
  301. uint16_t unreliableSequenceNumber;
  302. uint16_t dataLength;
  303. } ENET_PACKED ENetProtocolSendUnreliable;
  304. typedef struct _ENetProtocolSendUnsequenced {
  305. ENetProtocolCommandHeader header;
  306. uint16_t unsequencedGroup;
  307. uint16_t dataLength;
  308. } ENET_PACKED ENetProtocolSendUnsequenced;
  309. typedef struct _ENetProtocolSendFragment {
  310. ENetProtocolCommandHeader header;
  311. uint16_t startSequenceNumber;
  312. uint16_t dataLength;
  313. uint32_t fragmentCount;
  314. uint32_t fragmentNumber;
  315. uint32_t totalLength;
  316. uint32_t fragmentOffset;
  317. } ENET_PACKED ENetProtocolSendFragment;
  318. typedef union _ENetProtocol {
  319. ENetProtocolCommandHeader header;
  320. ENetProtocolAcknowledge acknowledge;
  321. ENetProtocolConnect connect;
  322. ENetProtocolVerifyConnect verifyConnect;
  323. ENetProtocolDisconnect disconnect;
  324. ENetProtocolPing ping;
  325. ENetProtocolSendReliable sendReliable;
  326. ENetProtocolSendUnreliable sendUnreliable;
  327. ENetProtocolSendUnsequenced sendUnsequenced;
  328. ENetProtocolSendFragment sendFragment;
  329. ENetProtocolBandwidthLimit bandwidthLimit;
  330. ENetProtocolThrottleConfigure throttleConfigure;
  331. } ENET_PACKED ENetProtocol;
  332. #ifdef _MSC_VER
  333. #pragma pack(pop)
  334. #endif
  335. /*
  336. =======================================================================
  337. General structs/enums
  338. =======================================================================
  339. */
  340. typedef enum _ENetSocketType {
  341. ENET_SOCKET_TYPE_STREAM = 1,
  342. ENET_SOCKET_TYPE_DATAGRAM = 2
  343. } ENetSocketType;
  344. typedef enum _ENetSocketWait {
  345. ENET_SOCKET_WAIT_NONE = 0,
  346. ENET_SOCKET_WAIT_SEND = (1 << 0),
  347. ENET_SOCKET_WAIT_RECEIVE = (1 << 1),
  348. ENET_SOCKET_WAIT_INTERRUPT = (1 << 2)
  349. } ENetSocketWait;
  350. typedef enum _ENetSocketOption {
  351. ENET_SOCKOPT_NONBLOCK = 1,
  352. ENET_SOCKOPT_BROADCAST = 2,
  353. ENET_SOCKOPT_RCVBUF = 3,
  354. ENET_SOCKOPT_SNDBUF = 4,
  355. ENET_SOCKOPT_REUSEADDR = 5,
  356. ENET_SOCKOPT_RCVTIMEO = 6,
  357. ENET_SOCKOPT_SNDTIMEO = 7,
  358. ENET_SOCKOPT_ERROR = 8,
  359. ENET_SOCKOPT_NODELAY = 9,
  360. ENET_SOCKOPT_IPV6_V6ONLY = 10
  361. } ENetSocketOption;
  362. typedef enum _ENetSocketShutdown {
  363. ENET_SOCKET_SHUTDOWN_READ = 0,
  364. ENET_SOCKET_SHUTDOWN_WRITE = 1,
  365. ENET_SOCKET_SHUTDOWN_READ_WRITE = 2
  366. } ENetSocketShutdown;
  367. typedef struct _ENetAddress {
  368. union {
  369. struct in6_addr ipv6;
  370. struct {
  371. uint8_t zeros[10];
  372. uint16_t ffff;
  373. struct in_addr ip;
  374. } ipv4;
  375. };
  376. uint16_t port;
  377. } ENetAddress;
  378. typedef enum _ENetPacketFlag {
  379. ENET_PACKET_FLAG_NONE = 0,
  380. ENET_PACKET_FLAG_RELIABLE = (1 << 0),
  381. ENET_PACKET_FLAG_UNSEQUENCED = (1 << 1),
  382. ENET_PACKET_FLAG_NO_ALLOCATE = (1 << 2),
  383. ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED = (1 << 3),
  384. ENET_PACKET_FLAG_INSTANT = (1 << 4),
  385. ENET_PACKET_FLAG_UNTHROTTLED = (1 << 5),
  386. ENET_PACKET_FLAG_SENT = (1 << 8)
  387. } ENetPacketFlag;
  388. typedef void (ENET_CALLBACK* ENetPacketFreeCallback)(void*);
  389. typedef struct _ENetPacket {
  390. uint32_t flags;
  391. uint32_t dataLength;
  392. uint8_t* data;
  393. ENetPacketFreeCallback freeCallback;
  394. uint32_t referenceCount;
  395. void* userData;
  396. } ENetPacket;
  397. typedef struct _ENetAcknowledgement {
  398. ENetListNode acknowledgementList;
  399. uint32_t sentTime;
  400. ENetProtocol command;
  401. } ENetAcknowledgement;
  402. typedef struct _ENetOutgoingCommand {
  403. ENetListNode outgoingCommandList;
  404. uint16_t reliableSequenceNumber;
  405. uint16_t unreliableSequenceNumber;
  406. uint32_t sentTime;
  407. uint32_t roundTripTimeout;
  408. uint32_t roundTripTimeoutLimit;
  409. uint32_t fragmentOffset;
  410. uint16_t fragmentLength;
  411. uint16_t sendAttempts;
  412. ENetProtocol command;
  413. ENetPacket* packet;
  414. } ENetOutgoingCommand;
  415. typedef struct _ENetIncomingCommand {
  416. ENetListNode incomingCommandList;
  417. uint16_t reliableSequenceNumber;
  418. uint16_t unreliableSequenceNumber;
  419. ENetProtocol command;
  420. uint32_t fragmentCount;
  421. uint32_t fragmentsRemaining;
  422. uint32_t* fragments;
  423. ENetPacket* packet;
  424. } ENetIncomingCommand;
  425. typedef enum _ENetPeerState {
  426. ENET_PEER_STATE_DISCONNECTED = 0,
  427. ENET_PEER_STATE_CONNECTING = 1,
  428. ENET_PEER_STATE_ACKNOWLEDGING_CONNECT = 2,
  429. ENET_PEER_STATE_CONNECTION_PENDING = 3,
  430. ENET_PEER_STATE_CONNECTION_SUCCEEDED = 4,
  431. ENET_PEER_STATE_CONNECTED = 5,
  432. ENET_PEER_STATE_DISCONNECT_LATER = 6,
  433. ENET_PEER_STATE_DISCONNECTING = 7,
  434. ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT = 8,
  435. ENET_PEER_STATE_ZOMBIE = 9
  436. } ENetPeerState;
  437. enum {
  438. ENET_HOST_BUFFER_SIZE_MIN = 256 * 1024,
  439. ENET_HOST_BUFFER_SIZE_MAX = 1024 * 1024,
  440. ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL = 1000,
  441. ENET_HOST_DEFAULT_MTU = 1280,
  442. ENET_HOST_DEFAULT_MAXIMUM_PACKET_SIZE = 32 * 1024 * 1024,
  443. ENET_HOST_DEFAULT_MAXIMUM_WAITING_DATA = 32 * 1024 * 1024,
  444. ENET_PEER_DEFAULT_ROUND_TRIP_TIME = 1,
  445. ENET_PEER_DEFAULT_PACKET_THROTTLE = 32,
  446. ENET_PEER_PACKET_THROTTLE_THRESHOLD = 40,
  447. ENET_PEER_PACKET_THROTTLE_SCALE = 32,
  448. ENET_PEER_PACKET_THROTTLE_COUNTER = 7,
  449. ENET_PEER_PACKET_THROTTLE_ACCELERATION = 2,
  450. ENET_PEER_PACKET_THROTTLE_DECELERATION = 2,
  451. ENET_PEER_PACKET_THROTTLE_INTERVAL = 5000,
  452. ENET_PEER_WINDOW_SIZE_SCALE = 64 * 1024,
  453. ENET_PEER_TIMEOUT_LIMIT = 32,
  454. ENET_PEER_TIMEOUT_MINIMUM = 5000,
  455. ENET_PEER_TIMEOUT_MAXIMUM = 30000,
  456. ENET_PEER_PING_INTERVAL = 250,
  457. ENET_PEER_UNSEQUENCED_WINDOWS = 64,
  458. ENET_PEER_UNSEQUENCED_WINDOW_SIZE = 1024,
  459. ENET_PEER_FREE_UNSEQUENCED_WINDOWS = 32,
  460. ENET_PEER_RELIABLE_WINDOWS = 16,
  461. ENET_PEER_RELIABLE_WINDOW_SIZE = 0x1000,
  462. ENET_PEER_FREE_RELIABLE_WINDOWS = 8
  463. };
  464. typedef struct _ENetChannel {
  465. uint16_t outgoingReliableSequenceNumber;
  466. uint16_t outgoingUnreliableSequenceNumber;
  467. uint16_t usedReliableWindows;
  468. uint16_t reliableWindows[ENET_PEER_RELIABLE_WINDOWS];
  469. uint16_t incomingReliableSequenceNumber;
  470. uint16_t incomingUnreliableSequenceNumber;
  471. ENetList incomingReliableCommands;
  472. ENetList incomingUnreliableCommands;
  473. } ENetChannel;
  474. typedef struct _ENetPeer {
  475. ENetListNode dispatchList;
  476. struct _ENetHost* host;
  477. uint16_t outgoingPeerID;
  478. uint16_t incomingPeerID;
  479. uint32_t connectID;
  480. uint8_t outgoingSessionID;
  481. uint8_t incomingSessionID;
  482. ENetAddress address;
  483. void* data;
  484. ENetPeerState state;
  485. ENetChannel* channels;
  486. size_t channelCount;
  487. uint32_t incomingBandwidth;
  488. uint32_t outgoingBandwidth;
  489. uint32_t incomingBandwidthThrottleEpoch;
  490. uint32_t outgoingBandwidthThrottleEpoch;
  491. uint32_t incomingDataTotal;
  492. uint64_t totalDataReceived;
  493. uint32_t outgoingDataTotal;
  494. uint64_t totalDataSent;
  495. uint32_t lastSendTime;
  496. uint32_t lastReceiveTime;
  497. uint32_t nextTimeout;
  498. uint32_t earliestTimeout;
  499. uint64_t totalPacketsSent;
  500. uint64_t totalPacketsLost;
  501. uint32_t packetThrottle;
  502. uint32_t packetThrottleThreshold;
  503. uint32_t packetThrottleLimit;
  504. uint32_t packetThrottleCounter;
  505. uint32_t packetThrottleEpoch;
  506. uint32_t packetThrottleAcceleration;
  507. uint32_t packetThrottleDeceleration;
  508. uint32_t packetThrottleInterval;
  509. uint32_t pingInterval;
  510. uint32_t timeoutLimit;
  511. uint32_t timeoutMinimum;
  512. uint32_t timeoutMaximum;
  513. uint32_t lastRoundTripTime;
  514. uint32_t lowestRoundTripTime;
  515. uint32_t lastRoundTripTimeVariance;
  516. uint32_t highestRoundTripTimeVariance;
  517. uint32_t roundTripTime;
  518. uint32_t roundTripTimeVariance;
  519. uint32_t mtu;
  520. uint32_t windowSize;
  521. uint32_t reliableDataInTransit;
  522. uint16_t outgoingReliableSequenceNumber;
  523. ENetList acknowledgements;
  524. ENetList sentReliableCommands;
  525. ENetList sentUnreliableCommands;
  526. ENetList outgoingCommands;
  527. ENetList dispatchedCommands;
  528. int needsDispatch;
  529. uint16_t incomingUnsequencedGroup;
  530. uint16_t outgoingUnsequencedGroup;
  531. uint32_t unsequencedWindow[ENET_PEER_UNSEQUENCED_WINDOW_SIZE / 32];
  532. uint32_t eventData;
  533. size_t totalWaitingData;
  534. } ENetPeer;
  535. typedef enum _ENetEventType {
  536. ENET_EVENT_TYPE_NONE = 0,
  537. ENET_EVENT_TYPE_CONNECT = 1,
  538. ENET_EVENT_TYPE_DISCONNECT = 2,
  539. ENET_EVENT_TYPE_RECEIVE = 3,
  540. ENET_EVENT_TYPE_DISCONNECT_TIMEOUT = 4
  541. } ENetEventType;
  542. typedef struct _ENetEvent {
  543. ENetEventType type;
  544. ENetPeer* peer;
  545. uint8_t channelID;
  546. uint32_t data;
  547. ENetPacket* packet;
  548. } ENetEvent;
  549. typedef uint64_t(ENET_CALLBACK* ENetChecksumCallback)(const ENetBuffer* buffers, int bufferCount);
  550. typedef int (ENET_CALLBACK* ENetInterceptCallback)(ENetEvent* event, uint8_t* receivedData, int receivedDataLength);
  551. typedef struct _ENetHost {
  552. ENetSocket socket;
  553. ENetAddress address;
  554. uint32_t incomingBandwidth;
  555. uint32_t outgoingBandwidth;
  556. uint32_t bandwidthThrottleEpoch;
  557. uint32_t mtu;
  558. uint32_t randomSeed;
  559. int recalculateBandwidthLimits;
  560. uint8_t preventConnections;
  561. ENetPeer* peers;
  562. size_t peerCount;
  563. size_t channelLimit;
  564. uint32_t serviceTime;
  565. ENetList dispatchQueue;
  566. int continueSending;
  567. size_t packetSize;
  568. uint16_t headerFlags;
  569. uint32_t totalSentData;
  570. uint32_t totalSentPackets;
  571. uint32_t totalReceivedData;
  572. uint32_t totalReceivedPackets;
  573. ENetProtocol commands[ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS];
  574. size_t commandCount;
  575. ENetBuffer buffers[ENET_BUFFER_MAXIMUM];
  576. size_t bufferCount;
  577. ENetChecksumCallback checksumCallback;
  578. uint8_t packetData[2][ENET_PROTOCOL_MAXIMUM_MTU];
  579. ENetAddress receivedAddress;
  580. uint8_t* receivedData;
  581. size_t receivedDataLength;
  582. ENetInterceptCallback interceptCallback;
  583. size_t connectedPeers;
  584. size_t bandwidthLimitedPeers;
  585. size_t duplicatePeers;
  586. size_t maximumPacketSize;
  587. size_t maximumWaitingData;
  588. } ENetHost;
  589. /*
  590. =======================================================================
  591. Public API
  592. =======================================================================
  593. */
  594. ENET_API int enet_initialize(void);
  595. ENET_API int enet_initialize_with_callbacks(ENetVersion, const ENetCallbacks*);
  596. ENET_API void enet_deinitialize(void);
  597. ENET_API ENetVersion enet_linked_version(void);
  598. ENET_API int enet_array_is_zeroed(const uint8_t*, int);
  599. ENET_API uint32_t enet_time_get(void);
  600. ENET_API uint64_t enet_crc64(const ENetBuffer*, int);
  601. ENET_API ENetPacket* enet_packet_create(const void*, size_t, uint32_t);
  602. ENET_API ENetPacket* enet_packet_create_offset(const void*, size_t, size_t, uint32_t);
  603. ENET_API void enet_packet_destroy(ENetPacket*);
  604. ENET_API int enet_peer_send(ENetPeer*, uint8_t, ENetPacket*);
  605. ENET_API ENetPacket* enet_peer_receive(ENetPeer*, uint8_t*);
  606. ENET_API void enet_peer_ping(ENetPeer*);
  607. ENET_API void enet_peer_ping_interval(ENetPeer*, uint32_t);
  608. ENET_API void enet_peer_timeout(ENetPeer*, uint32_t, uint32_t, uint32_t);
  609. ENET_API void enet_peer_reset(ENetPeer*);
  610. ENET_API void enet_peer_disconnect(ENetPeer*, uint32_t);
  611. ENET_API void enet_peer_disconnect_now(ENetPeer*, uint32_t);
  612. ENET_API void enet_peer_disconnect_later(ENetPeer*, uint32_t);
  613. ENET_API void enet_peer_throttle_configure(ENetPeer*, uint32_t, uint32_t, uint32_t, uint32_t);
  614. ENET_API ENetHost* enet_host_create(const ENetAddress*, size_t, size_t, uint32_t, uint32_t, int);
  615. ENET_API void enet_host_destroy(ENetHost*);
  616. ENET_API void enet_host_prevent_connections(ENetHost*, uint8_t);
  617. ENET_API ENetPeer* enet_host_connect(ENetHost*, const ENetAddress*, size_t, uint32_t);
  618. ENET_API int enet_host_check_events(ENetHost*, ENetEvent*);
  619. ENET_API int enet_host_service(ENetHost*, ENetEvent*, uint32_t);
  620. ENET_API void enet_host_flush(ENetHost*);
  621. ENET_API void enet_host_broadcast(ENetHost*, uint8_t, ENetPacket*);
  622. ENET_API void enet_host_broadcast_exclude(ENetHost*, uint8_t, ENetPacket*, ENetPeer*);
  623. ENET_API void enet_host_broadcast_selective(ENetHost*, uint8_t, ENetPacket*, ENetPeer**, size_t);
  624. ENET_API void enet_host_channel_limit(ENetHost*, size_t);
  625. ENET_API void enet_host_bandwidth_limit(ENetHost*, uint32_t, uint32_t);
  626. ENET_API int enet_address_set_ip(ENetAddress*, const char*);
  627. ENET_API int enet_address_set_hostname(ENetAddress*, const char*);
  628. ENET_API int enet_address_get_ip(const ENetAddress*, char*, size_t);
  629. ENET_API int enet_address_get_hostname(const ENetAddress*, char*, size_t);
  630. ENET_API ENetSocket enet_socket_create(ENetSocketType);
  631. ENET_API int enet_socket_bind(ENetSocket, const ENetAddress*);
  632. ENET_API int enet_socket_get_address(ENetSocket, ENetAddress*);
  633. ENET_API int enet_socket_listen(ENetSocket, int);
  634. ENET_API ENetSocket enet_socket_accept(ENetSocket, ENetAddress*);
  635. ENET_API int enet_socket_connect(ENetSocket, const ENetAddress*);
  636. ENET_API int enet_socket_send(ENetSocket, const ENetAddress*, const ENetBuffer*, size_t);
  637. ENET_API int enet_socket_receive(ENetSocket, ENetAddress*, ENetBuffer*, size_t);
  638. ENET_API int enet_socket_wait(ENetSocket, uint32_t*, uint64_t);
  639. ENET_API int enet_socket_set_option(ENetSocket, ENetSocketOption, int);
  640. ENET_API int enet_socket_get_option(ENetSocket, ENetSocketOption, int*);
  641. ENET_API int enet_socket_shutdown(ENetSocket, ENetSocketShutdown);
  642. ENET_API void enet_socket_destroy(ENetSocket);
  643. ENET_API int enet_socket_set_select(ENetSocket, ENetSocketSet*, ENetSocketSet*, uint32_t);
  644. /* Extended API for easier binding in other programming languages */
  645. ENET_API void* enet_packet_get_data(const ENetPacket*);
  646. ENET_API void* enet_packet_get_user_data(const ENetPacket*);
  647. ENET_API void enet_packet_set_user_data(ENetPacket*, void* userData);
  648. ENET_API int enet_packet_get_length(const ENetPacket*);
  649. ENET_API void enet_packet_set_free_callback(ENetPacket*, ENetPacketFreeCallback);
  650. ENET_API int enet_packet_check_references(const ENetPacket*);
  651. ENET_API void enet_packet_dispose(ENetPacket*);
  652. ENET_API uint32_t enet_host_get_peers_count(const ENetHost*);
  653. ENET_API uint32_t enet_host_get_packets_sent(const ENetHost*);
  654. ENET_API uint32_t enet_host_get_packets_received(const ENetHost*);
  655. ENET_API uint32_t enet_host_get_bytes_sent(const ENetHost*);
  656. ENET_API uint32_t enet_host_get_bytes_received(const ENetHost*);
  657. ENET_API void enet_host_set_max_duplicate_peers(ENetHost*, uint16_t);
  658. ENET_API void enet_host_set_intercept_callback(ENetHost*, ENetInterceptCallback);
  659. ENET_API void enet_host_set_checksum_callback(ENetHost*, ENetChecksumCallback);
  660. ENET_API uint32_t enet_peer_get_id(const ENetPeer*);
  661. ENET_API int enet_peer_get_ip(const ENetPeer*, char*, size_t);
  662. ENET_API uint16_t enet_peer_get_port(const ENetPeer*);
  663. ENET_API uint32_t enet_peer_get_mtu(const ENetPeer*);
  664. ENET_API ENetPeerState enet_peer_get_state(const ENetPeer*);
  665. ENET_API uint32_t enet_peer_get_rtt(const ENetPeer*);
  666. ENET_API uint32_t enet_peer_get_last_rtt(const ENetPeer* peer);
  667. ENET_API uint32_t enet_peer_get_lastsendtime(const ENetPeer*);
  668. ENET_API uint32_t enet_peer_get_lastreceivetime(const ENetPeer*);
  669. ENET_API uint64_t enet_peer_get_packets_sent(const ENetPeer*);
  670. ENET_API uint64_t enet_peer_get_packets_lost(const ENetPeer*);
  671. ENET_API float enet_peer_get_packets_throttle(const ENetPeer*);
  672. ENET_API uint64_t enet_peer_get_bytes_sent(const ENetPeer*);
  673. ENET_API uint64_t enet_peer_get_bytes_received(const ENetPeer*);
  674. ENET_API void* enet_peer_get_data(const ENetPeer*);
  675. ENET_API void enet_peer_set_data(ENetPeer*, const void*);
  676. /*
  677. =======================================================================
  678. Private API
  679. =======================================================================
  680. */
  681. extern void enet_host_bandwidth_throttle(ENetHost*);
  682. extern uint64_t enet_host_random_seed(void);
  683. extern int enet_peer_throttle(ENetPeer*, uint32_t);
  684. extern void enet_peer_reset_queues(ENetPeer*);
  685. extern void enet_peer_setup_outgoing_command(ENetPeer*, ENetOutgoingCommand*);
  686. extern ENetOutgoingCommand* enet_peer_queue_outgoing_command(ENetPeer*, const ENetProtocol*, ENetPacket*, uint32_t, uint16_t);
  687. extern ENetIncomingCommand* enet_peer_queue_incoming_command(ENetPeer*, const ENetProtocol*, const void*, size_t, uint32_t, uint32_t);
  688. extern ENetAcknowledgement* enet_peer_queue_acknowledgement(ENetPeer*, const ENetProtocol*, uint16_t);
  689. extern void enet_peer_dispatch_incoming_unreliable_commands(ENetPeer*, ENetChannel*, ENetIncomingCommand*);
  690. extern void enet_peer_dispatch_incoming_reliable_commands(ENetPeer*, ENetChannel*, ENetIncomingCommand*);
  691. extern void enet_peer_on_connect(ENetPeer*);
  692. extern void enet_peer_on_disconnect(ENetPeer*);
  693. extern size_t enet_protocol_command_size(uint8_t);
  694. #ifdef __cplusplus
  695. }
  696. #endif
  697. #if defined(ENET_IMPLEMENTATION) && !defined(ENET_IMPLEMENTATION_DONE)
  698. #define ENET_IMPLEMENTATION_DONE 1
  699. #ifdef _MSC_VER
  700. #pragma warning(push)
  701. #pragma warning(disable: 4244) /* 64-bit to 32-bit integer conversion */
  702. #pragma warning(disable: 4267) /* size_t to integer conversion */
  703. #endif
  704. /*
  705. =======================================================================
  706. Atomics
  707. =======================================================================
  708. */
  709. #ifdef _MSC_VER
  710. #define ENET_AT_CASSERT_PRED(predicate) sizeof(char[2 * !!(predicate) - 1])
  711. #define ENET_IS_SUPPORTED_ATOMIC(size) ENET_AT_CASSERT_PRED(size == 1 || size == 2 || size == 4 || size == 8)
  712. #define ENET_ATOMIC_SIZEOF(variable) (ENET_IS_SUPPORTED_ATOMIC(sizeof(*(variable))), sizeof(*(variable)))
  713. __inline int64_t enet_at_atomic_read(char* ptr, size_t size) {
  714. switch (size) {
  715. case 1:
  716. return _InterlockedExchangeAdd8((volatile char*)ptr, 0);
  717. case 2:
  718. return _InterlockedExchangeAdd16((volatile SHORT*)ptr, 0);
  719. case 4:
  720. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  721. return InterlockedExchangeAdd((volatile LONG*)ptr, 0);
  722. #else
  723. return _InterlockedExchangeAdd((volatile LONG*)ptr, 0);
  724. #endif
  725. case 8:
  726. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  727. return InterlockedExchangeAdd64((volatile LONGLONG*)ptr, 0);
  728. #else
  729. return _InterlockedExchangeAdd64((volatile LONGLONG*)ptr, 0);
  730. #endif
  731. default:
  732. return 0x0;
  733. }
  734. }
  735. __inline int64_t enet_at_atomic_write(char* ptr, int64_t value, size_t size) {
  736. switch (size) {
  737. case 1:
  738. return _InterlockedExchange8((volatile char*)ptr, (char)value);
  739. case 2:
  740. return _InterlockedExchange16((volatile SHORT*)ptr, (SHORT)value);
  741. case 4:
  742. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  743. return InterlockedExchange((volatile LONG*)ptr, (LONG)value);
  744. #else
  745. return _InterlockedExchange((volatile LONG*)ptr, (LONG)value);
  746. #endif
  747. case 8:
  748. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  749. return InterlockedExchange64((volatile LONGLONG*)ptr, (LONGLONG)value);
  750. #else
  751. return _InterlockedExchange64((volatile LONGLONG*)ptr, (LONGLONG)value);
  752. #endif
  753. default:
  754. return 0x0;
  755. }
  756. }
  757. __inline int64_t enet_at_atomic_cas(char* ptr, int64_t new_val, int64_t old_val, size_t size) {
  758. switch (size) {
  759. case 1:
  760. return _InterlockedCompareExchange8((volatile char*)ptr, (char)new_val, (char)old_val);
  761. case 2:
  762. return _InterlockedCompareExchange16((volatile SHORT*)ptr, (SHORT)new_val, (SHORT)old_val);
  763. case 4:
  764. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  765. return InterlockedCompareExchange((volatile LONG*)ptr, (LONG)new_val, (LONG)old_val);
  766. #else
  767. return _InterlockedCompareExchange((volatile LONG*)ptr, (LONG)new_val, (LONG)old_val);
  768. #endif
  769. case 8:
  770. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  771. return InterlockedCompareExchange64((volatile LONGLONG*)ptr, (LONGLONG)new_val, (LONGLONG)old_val);
  772. #else
  773. return _InterlockedCompareExchange64((volatile LONGLONG*)ptr, (LONGLONG)new_val, (LONGLONG)old_val);
  774. #endif
  775. default:
  776. return 0x0;
  777. }
  778. }
  779. __inline int64_t enet_at_atomic_inc(char* ptr, int64_t delta, size_t data_size) {
  780. switch (data_size) {
  781. case 1:
  782. return _InterlockedExchangeAdd8((volatile char*)ptr, (char)delta);
  783. case 2:
  784. return _InterlockedExchangeAdd16((volatile SHORT*)ptr, (SHORT)delta);
  785. case 4:
  786. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  787. return InterlockedExchangeAdd((volatile LONG*)ptr, (LONG)delta);
  788. #else
  789. return _InterlockedExchangeAdd((volatile LONG*)ptr, (LONG)delta);
  790. #endif
  791. case 8:
  792. #ifdef ENET_NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  793. return InterlockedExchangeAdd64((volatile LONGLONG*)ptr, (LONGLONG)delta);
  794. #else
  795. return _InterlockedExchangeAdd64((volatile LONGLONG*)ptr, (LONGLONG)delta);
  796. #endif
  797. default:
  798. return 0x0;
  799. }
  800. }
  801. #define ENET_ATOMIC_READ(variable) enet_at_atomic_read((char*)(variable), ENET_ATOMIC_SIZEOF(variable))
  802. #define ENET_ATOMIC_WRITE(variable, new_val) enet_at_atomic_write((char*)(variable), (int64_t)(new_val), ENET_ATOMIC_SIZEOF(variable))
  803. #define ENET_ATOMIC_CAS(variable, old_value, new_val) enet_at_atomic_cas((char*)(variable), (int64_t)(new_val), (int64_t)(old_value), ENET_ATOMIC_SIZEOF(variable))
  804. #define ENET_ATOMIC_INC(variable) enet_at_atomic_inc((char*)(variable), 1, ENET_ATOMIC_SIZEOF(variable))
  805. #define ENET_ATOMIC_DEC(variable) enet_at_atomic_inc((char*)(variable), -1, ENET_ATOMIC_SIZEOF(variable))
  806. #define ENET_ATOMIC_INC_BY(variable, delta) enet_at_atomic_inc((char*)(variable), (delta), ENET_ATOMIC_SIZEOF(variable))
  807. #define ENET_ATOMIC_DEC_BY(variable, delta) enet_at_atomic_inc((char*)(variable), -(delta), ENET_ATOMIC_SIZEOF(variable))
  808. #elif defined(__GNUC__) || defined(__clang__)
  809. #if defined(__clang__) || (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
  810. #define AT_HAVE_ATOMICS
  811. #endif
  812. /* We want to use __atomic built-ins if possible because the __sync primitives are
  813. deprecated, because the __atomic build-ins allow us to use ENET_ATOMIC_WRITE on
  814. uninitialized memory without running into undefined behavior, and because the
  815. __atomic versions generate more efficient code since we don't need to rely on
  816. CAS when we don't actually want it.
  817. Note that we use acquire-release memory order (like mutexes do). We could use
  818. sequentially consistent memory order but that has lower performance and is
  819. almost always unneeded. */
  820. #ifdef AT_HAVE_ATOMICS
  821. #define ENET_ATOMIC_READ(ptr) __atomic_load_n((ptr), __ATOMIC_ACQUIRE)
  822. #define ENET_ATOMIC_WRITE(ptr, value) __atomic_store_n((ptr), (value), __ATOMIC_RELEASE)
  823. #ifndef typeof
  824. #define typeof __typeof__
  825. #endif
  826. /* clang_analyzer doesn't know that CAS writes to memory so it complains about
  827. potentially lost data. Replace the code with the equivalent non-sync code. */
  828. #ifdef __clang_analyzer__
  829. #define ENET_ATOMIC_CAS(ptr, old_value, new_value)\
  830. ({\
  831. typeof(*(ptr)) ENET_ATOMIC_CAS_old_actual_ = (*(ptr));\
  832. if (ATOMIC_CAS_old_actual_ == (old_value))\
  833. *(ptr) = new_value;\
  834. ENET_ATOMIC_CAS_old_actual_;\
  835. })
  836. #else
  837. /* Could use __auto_type instead of typeof but that shouldn't work in C++.
  838. The ({ }) syntax is a GCC extension called statement expression. It lets
  839. us return a value out of the macro.
  840. TODO We should return bool here instead of the old value to avoid the ABA
  841. problem. */
  842. #define ENET_ATOMIC_CAS(ptr, old_value, new_value)\
  843. ({\
  844. typeof(*(ptr)) ENET_ATOMIC_CAS_expected_ = (old_value);\
  845. __atomic_compare_exchange_n((ptr), &ENET_ATOMIC_CAS_expected_, (new_value), false,\
  846. __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE);\
  847. ENET_ATOMIC_CAS_expected_;\
  848. })
  849. #endif
  850. #define ENET_ATOMIC_INC(ptr) __atomic_fetch_add((ptr), 1, __ATOMIC_ACQ_REL)
  851. #define ENET_ATOMIC_DEC(ptr) __atomic_fetch_sub((ptr), 1, __ATOMIC_ACQ_REL)
  852. #define ENET_ATOMIC_INC_BY(ptr, delta) __atomic_fetch_add((ptr), (delta), __ATOMIC_ACQ_REL)
  853. #define ENET_ATOMIC_DEC_BY(ptr, delta) __atomic_fetch_sub((ptr), (delta), __ATOMIC_ACQ_REL)
  854. #else
  855. #define ENET_ATOMIC_READ(variable) __sync_fetch_and_add(variable, 0)
  856. #define ENET_ATOMIC_WRITE(variable, new_val) (void)__sync_val_compare_and_swap((variable), *(variable), (new_val))
  857. #define ENET_ATOMIC_CAS(variable, old_value, new_val) __sync_val_compare_and_swap((variable), (old_value), (new_val))
  858. #define ENET_ATOMIC_INC(variable) __sync_fetch_and_add((variable), 1)
  859. #define ENET_ATOMIC_DEC(variable) __sync_fetch_and_sub((variable), 1)
  860. #define ENET_ATOMIC_INC_BY(variable, delta) __sync_fetch_and_add((variable), (delta), 1)
  861. #define ENET_ATOMIC_DEC_BY(variable, delta) __sync_fetch_and_sub((variable), (delta), 1)
  862. #endif
  863. #undef AT_HAVE_ATOMICS
  864. #endif
  865. /*
  866. =======================================================================
  867. Callbacks
  868. =======================================================================
  869. */
  870. static ENetCallbacks callbacks = {
  871. malloc,
  872. free,
  873. abort
  874. };
  875. int enet_initialize_with_callbacks(ENetVersion version, const ENetCallbacks* inits) {
  876. if (version < ENET_VERSION_CREATE(1, 3, 0)) {
  877. ENET_LOG_ERROR("ENET version is too old");
  878. return -1;
  879. }
  880. if (inits->malloc != NULL || inits->free != NULL) {
  881. if (inits->malloc == NULL || inits->free == NULL) {
  882. ENET_LOG_ERROR("Memory allocator/free mechanism is NULL");
  883. return -1;
  884. }
  885. callbacks.malloc = inits->malloc;
  886. callbacks.free = inits->free;
  887. }
  888. if (inits->noMemory != NULL)
  889. callbacks.noMemory = inits->noMemory;
  890. return enet_initialize();
  891. }
  892. void* enet_malloc(size_t size) {
  893. void* memory = callbacks.malloc(size);
  894. if (memory == NULL)
  895. callbacks.noMemory();
  896. return memory;
  897. }
  898. void enet_free(void* memory) {
  899. callbacks.free(memory);
  900. }
  901. /*
  902. =======================================================================
  903. List
  904. =======================================================================
  905. */
  906. void enet_list_clear(ENetList* list) {
  907. list->sentinel.next = &list->sentinel;
  908. list->sentinel.previous = &list->sentinel;
  909. }
  910. ENetListIterator enet_list_insert(ENetListIterator position, void* data) {
  911. ENetListIterator result = (ENetListIterator)data;
  912. result->previous = position->previous;
  913. result->next = position;
  914. result->previous->next = result;
  915. position->previous = result;
  916. return result;
  917. }
  918. void* enet_list_remove(ENetListIterator position) {
  919. position->previous->next = position->next;
  920. position->next->previous = position->previous;
  921. return position;
  922. }
  923. ENetListIterator enet_list_move(ENetListIterator position, void* dataFirst, void* dataLast) {
  924. ENetListIterator first = (ENetListIterator)dataFirst;
  925. ENetListIterator last = (ENetListIterator)dataLast;
  926. first->previous->next = last->next;
  927. last->next->previous = first->previous;
  928. first->previous = position->previous;
  929. last->next = position;
  930. first->previous->next = first;
  931. position->previous = last;
  932. return first;
  933. }
  934. size_t enet_list_size(ENetList* list) {
  935. size_t size = 0;
  936. ENetListIterator position;
  937. for (position = enet_list_begin(list); position != enet_list_end(list); position = enet_list_next(position)) {
  938. ++size;
  939. }
  940. return size;
  941. }
  942. /*
  943. =======================================================================
  944. Utilities
  945. =======================================================================
  946. */
  947. ENetVersion enet_linked_version(void) {
  948. return ENET_VERSION;
  949. }
  950. int enet_array_is_zeroed(const uint8_t* array, int length) {
  951. size_t i;
  952. for (i = 0; i < length; i++) {
  953. if (array[i] != 0)
  954. return -1;
  955. }
  956. return 0;
  957. }
  958. /*
  959. =======================================================================
  960. Time
  961. =======================================================================
  962. */
  963. #ifdef _WIN32
  964. static LARGE_INTEGER gettime_offset(void) {
  965. SYSTEMTIME s;
  966. FILETIME f;
  967. LARGE_INTEGER t;
  968. s.wYear = 1970;
  969. s.wMonth = 1;
  970. s.wDay = 1;
  971. s.wHour = 0;
  972. s.wMinute = 0;
  973. s.wSecond = 0;
  974. s.wMilliseconds = 0;
  975. SystemTimeToFileTime(&s, &f);
  976. t.QuadPart = f.dwHighDateTime;
  977. t.QuadPart <<= 32;
  978. t.QuadPart |= f.dwLowDateTime;
  979. return t;
  980. }
  981. int clock_gettime(int X, struct timespec* tv) {
  982. LARGE_INTEGER t;
  983. FILETIME f;
  984. double microseconds;
  985. static LARGE_INTEGER offset;
  986. static double frequencyToMicroseconds;
  987. static int initialized = 0;
  988. static BOOL usePerformanceCounter = 0;
  989. if (!initialized) {
  990. LARGE_INTEGER performanceFrequency;
  991. initialized = 1;
  992. usePerformanceCounter = QueryPerformanceFrequency(&performanceFrequency);
  993. if (usePerformanceCounter) {
  994. QueryPerformanceCounter(&offset);
  995. frequencyToMicroseconds = (double)performanceFrequency.QuadPart / 1000000.;
  996. }
  997. else {
  998. offset = gettime_offset();
  999. frequencyToMicroseconds = 10.;
  1000. }
  1001. }
  1002. if (usePerformanceCounter) {
  1003. QueryPerformanceCounter(&t);
  1004. }
  1005. else {
  1006. GetSystemTimeAsFileTime(&f);
  1007. t.QuadPart = f.dwHighDateTime;
  1008. t.QuadPart <<= 32;
  1009. t.QuadPart |= f.dwLowDateTime;
  1010. }
  1011. t.QuadPart -= offset.QuadPart;
  1012. microseconds = (double)t.QuadPart / frequencyToMicroseconds;
  1013. t.QuadPart = (LONGLONG)microseconds;
  1014. tv->tv_sec = (long)(t.QuadPart / 1000000);
  1015. tv->tv_nsec = t.QuadPart % 1000000 * 1000;
  1016. return 0;
  1017. }
  1018. #elif __APPLE__ && (__MAC_OS_X_VERSION_MIN_REQUIRED < 101200 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000) && !defined(CLOCK_MONOTONIC)
  1019. #define CLOCK_MONOTONIC 0
  1020. int clock_gettime(int X, struct timespec* ts) {
  1021. clock_serv_t cclock;
  1022. mach_timespec_t mts;
  1023. host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
  1024. clock_get_time(cclock, &mts);
  1025. mach_port_deallocate(mach_task_self(), cclock);
  1026. ts->tv_sec = mts.tv_sec;
  1027. ts->tv_nsec = mts.tv_nsec;
  1028. return 0;
  1029. }
  1030. #endif
  1031. uint32_t enet_time_get(void) {
  1032. static uint64_t start_time_ns = 0;
  1033. struct timespec ts;
  1034. #ifdef CLOCK_MONOTONIC_RAW
  1035. clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
  1036. #else
  1037. clock_gettime(CLOCK_MONOTONIC, &ts);
  1038. #endif
  1039. static const uint64_t ns_in_s = 1000 * 1000 * 1000;
  1040. static const uint64_t ns_in_ms = 1000 * 1000;
  1041. uint64_t current_time_ns = ts.tv_nsec + (uint64_t)ts.tv_sec * ns_in_s;
  1042. uint64_t offset_ns = ENET_ATOMIC_READ(&start_time_ns);
  1043. if (offset_ns == 0) {
  1044. uint64_t want_value = current_time_ns - 1 * ns_in_ms;
  1045. uint64_t old_value = ENET_ATOMIC_CAS(&start_time_ns, 0, want_value);
  1046. offset_ns = old_value == 0 ? want_value : old_value;
  1047. }
  1048. uint64_t result_in_ns = current_time_ns - offset_ns;
  1049. return (uint32_t)(result_in_ns / ns_in_ms);
  1050. }
  1051. /*
  1052. =======================================================================
  1053. Checksum
  1054. =======================================================================
  1055. */
  1056. static const uint64_t crcTable[256] = {
  1057. UINT64_C(0x0000000000000000), UINT64_C(0x7ad870c830358979),
  1058. UINT64_C(0xf5b0e190606b12f2), UINT64_C(0x8f689158505e9b8b),
  1059. UINT64_C(0xc038e5739841b68f), UINT64_C(0xbae095bba8743ff6),
  1060. UINT64_C(0x358804e3f82aa47d), UINT64_C(0x4f50742bc81f2d04),
  1061. UINT64_C(0xab28ecb46814fe75), UINT64_C(0xd1f09c7c5821770c),
  1062. UINT64_C(0x5e980d24087fec87), UINT64_C(0x24407dec384a65fe),
  1063. UINT64_C(0x6b1009c7f05548fa), UINT64_C(0x11c8790fc060c183),
  1064. UINT64_C(0x9ea0e857903e5a08), UINT64_C(0xe478989fa00bd371),
  1065. UINT64_C(0x7d08ff3b88be6f81), UINT64_C(0x07d08ff3b88be6f8),
  1066. UINT64_C(0x88b81eabe8d57d73), UINT64_C(0xf2606e63d8e0f40a),
  1067. UINT64_C(0xbd301a4810ffd90e), UINT64_C(0xc7e86a8020ca5077),
  1068. UINT64_C(0x4880fbd87094cbfc), UINT64_C(0x32588b1040a14285),
  1069. UINT64_C(0xd620138fe0aa91f4), UINT64_C(0xacf86347d09f188d),
  1070. UINT64_C(0x2390f21f80c18306), UINT64_C(0x594882d7b0f40a7f),
  1071. UINT64_C(0x1618f6fc78eb277b), UINT64_C(0x6cc0863448deae02),
  1072. UINT64_C(0xe3a8176c18803589), UINT64_C(0x997067a428b5bcf0),
  1073. UINT64_C(0xfa11fe77117cdf02), UINT64_C(0x80c98ebf2149567b),
  1074. UINT64_C(0x0fa11fe77117cdf0), UINT64_C(0x75796f2f41224489),
  1075. UINT64_C(0x3a291b04893d698d), UINT64_C(0x40f16bccb908e0f4),
  1076. UINT64_C(0xcf99fa94e9567b7f), UINT64_C(0xb5418a5cd963f206),
  1077. UINT64_C(0x513912c379682177), UINT64_C(0x2be1620b495da80e),
  1078. UINT64_C(0xa489f35319033385), UINT64_C(0xde51839b2936bafc),
  1079. UINT64_C(0x9101f7b0e12997f8), UINT64_C(0xebd98778d11c1e81),
  1080. UINT64_C(0x64b116208142850a), UINT64_C(0x1e6966e8b1770c73),
  1081. UINT64_C(0x8719014c99c2b083), UINT64_C(0xfdc17184a9f739fa),
  1082. UINT64_C(0x72a9e0dcf9a9a271), UINT64_C(0x08719014c99c2b08),
  1083. UINT64_C(0x4721e43f0183060c), UINT64_C(0x3df994f731b68f75),
  1084. UINT64_C(0xb29105af61e814fe), UINT64_C(0xc849756751dd9d87),
  1085. UINT64_C(0x2c31edf8f1d64ef6), UINT64_C(0x56e99d30c1e3c78f),
  1086. UINT64_C(0xd9810c6891bd5c04), UINT64_C(0xa3597ca0a188d57d),
  1087. UINT64_C(0xec09088b6997f879), UINT64_C(0x96d1784359a27100),
  1088. UINT64_C(0x19b9e91b09fcea8b), UINT64_C(0x636199d339c963f2),
  1089. UINT64_C(0xdf7adabd7a6e2d6f), UINT64_C(0xa5a2aa754a5ba416),
  1090. UINT64_C(0x2aca3b2d1a053f9d), UINT64_C(0x50124be52a30b6e4),
  1091. UINT64_C(0x1f423fcee22f9be0), UINT64_C(0x659a4f06d21a1299),
  1092. UINT64_C(0xeaf2de5e82448912), UINT64_C(0x902aae96b271006b),
  1093. UINT64_C(0x74523609127ad31a), UINT64_C(0x0e8a46c1224f5a63),
  1094. UINT64_C(0x81e2d7997211c1e8), UINT64_C(0xfb3aa75142244891),
  1095. UINT64_C(0xb46ad37a8a3b6595), UINT64_C(0xceb2a3b2ba0eecec),
  1096. UINT64_C(0x41da32eaea507767), UINT64_C(0x3b024222da65fe1e),
  1097. UINT64_C(0xa2722586f2d042ee), UINT64_C(0xd8aa554ec2e5cb97),
  1098. UINT64_C(0x57c2c41692bb501c), UINT64_C(0x2d1ab4dea28ed965),
  1099. UINT64_C(0x624ac0f56a91f461), UINT64_C(0x1892b03d5aa47d18),
  1100. UINT64_C(0x97fa21650afae693), UINT64_C(0xed2251ad3acf6fea),
  1101. UINT64_C(0x095ac9329ac4bc9b), UINT64_C(0x7382b9faaaf135e2),
  1102. UINT64_C(0xfcea28a2faafae69), UINT64_C(0x8632586aca9a2710),
  1103. UINT64_C(0xc9622c4102850a14), UINT64_C(0xb3ba5c8932b0836d),
  1104. UINT64_C(0x3cd2cdd162ee18e6), UINT64_C(0x460abd1952db919f),
  1105. UINT64_C(0x256b24ca6b12f26d), UINT64_C(0x5fb354025b277b14),
  1106. UINT64_C(0xd0dbc55a0b79e09f), UINT64_C(0xaa03b5923b4c69e6),
  1107. UINT64_C(0xe553c1b9f35344e2), UINT64_C(0x9f8bb171c366cd9b),
  1108. UINT64_C(0x10e3202993385610), UINT64_C(0x6a3b50e1a30ddf69),
  1109. UINT64_C(0x8e43c87e03060c18), UINT64_C(0xf49bb8b633338561),
  1110. UINT64_C(0x7bf329ee636d1eea), UINT64_C(0x012b592653589793),
  1111. UINT64_C(0x4e7b2d0d9b47ba97), UINT64_C(0x34a35dc5ab7233ee),
  1112. UINT64_C(0xbbcbcc9dfb2ca865), UINT64_C(0xc113bc55cb19211c),
  1113. UINT64_C(0x5863dbf1e3ac9dec), UINT64_C(0x22bbab39d3991495),
  1114. UINT64_C(0xadd33a6183c78f1e), UINT64_C(0xd70b4aa9b3f20667),
  1115. UINT64_C(0x985b3e827bed2b63), UINT64_C(0xe2834e4a4bd8a21a),
  1116. UINT64_C(0x6debdf121b863991), UINT64_C(0x1733afda2bb3b0e8),
  1117. UINT64_C(0xf34b37458bb86399), UINT64_C(0x8993478dbb8deae0),
  1118. UINT64_C(0x06fbd6d5ebd3716b), UINT64_C(0x7c23a61ddbe6f812),
  1119. UINT64_C(0x3373d23613f9d516), UINT64_C(0x49aba2fe23cc5c6f),
  1120. UINT64_C(0xc6c333a67392c7e4), UINT64_C(0xbc1b436e43a74e9d),
  1121. UINT64_C(0x95ac9329ac4bc9b5), UINT64_C(0xef74e3e19c7e40cc),
  1122. UINT64_C(0x601c72b9cc20db47), UINT64_C(0x1ac40271fc15523e),
  1123. UINT64_C(0x5594765a340a7f3a), UINT64_C(0x2f4c0692043ff643),
  1124. UINT64_C(0xa02497ca54616dc8), UINT64_C(0xdafce7026454e4b1),
  1125. UINT64_C(0x3e847f9dc45f37c0), UINT64_C(0x445c0f55f46abeb9),
  1126. UINT64_C(0xcb349e0da4342532), UINT64_C(0xb1eceec59401ac4b),
  1127. UINT64_C(0xfebc9aee5c1e814f), UINT64_C(0x8464ea266c2b0836),
  1128. UINT64_C(0x0b0c7b7e3c7593bd), UINT64_C(0x71d40bb60c401ac4),
  1129. UINT64_C(0xe8a46c1224f5a634), UINT64_C(0x927c1cda14c02f4d),
  1130. UINT64_C(0x1d148d82449eb4c6), UINT64_C(0x67ccfd4a74ab3dbf),
  1131. UINT64_C(0x289c8961bcb410bb), UINT64_C(0x5244f9a98c8199c2),
  1132. UINT64_C(0xdd2c68f1dcdf0249), UINT64_C(0xa7f41839ecea8b30),
  1133. UINT64_C(0x438c80a64ce15841), UINT64_C(0x3954f06e7cd4d138),
  1134. UINT64_C(0xb63c61362c8a4ab3), UINT64_C(0xcce411fe1cbfc3ca),
  1135. UINT64_C(0x83b465d5d4a0eece), UINT64_C(0xf96c151de49567b7),
  1136. UINT64_C(0x76048445b4cbfc3c), UINT64_C(0x0cdcf48d84fe7545),
  1137. UINT64_C(0x6fbd6d5ebd3716b7), UINT64_C(0x15651d968d029fce),
  1138. UINT64_C(0x9a0d8ccedd5c0445), UINT64_C(0xe0d5fc06ed698d3c),
  1139. UINT64_C(0xaf85882d2576a038), UINT64_C(0xd55df8e515432941),
  1140. UINT64_C(0x5a3569bd451db2ca), UINT64_C(0x20ed197575283bb3),
  1141. UINT64_C(0xc49581ead523e8c2), UINT64_C(0xbe4df122e51661bb),
  1142. UINT64_C(0x3125607ab548fa30), UINT64_C(0x4bfd10b2857d7349),
  1143. UINT64_C(0x04ad64994d625e4d), UINT64_C(0x7e7514517d57d734),
  1144. UINT64_C(0xf11d85092d094cbf), UINT64_C(0x8bc5f5c11d3cc5c6),
  1145. UINT64_C(0x12b5926535897936), UINT64_C(0x686de2ad05bcf04f),
  1146. UINT64_C(0xe70573f555e26bc4), UINT64_C(0x9ddd033d65d7e2bd),
  1147. UINT64_C(0xd28d7716adc8cfb9), UINT64_C(0xa85507de9dfd46c0),
  1148. UINT64_C(0x273d9686cda3dd4b), UINT64_C(0x5de5e64efd965432),
  1149. UINT64_C(0xb99d7ed15d9d8743), UINT64_C(0xc3450e196da80e3a),
  1150. UINT64_C(0x4c2d9f413df695b1), UINT64_C(0x36f5ef890dc31cc8),
  1151. UINT64_C(0x79a59ba2c5dc31cc), UINT64_C(0x037deb6af5e9b8b5),
  1152. UINT64_C(0x8c157a32a5b7233e), UINT64_C(0xf6cd0afa9582aa47),
  1153. UINT64_C(0x4ad64994d625e4da), UINT64_C(0x300e395ce6106da3),
  1154. UINT64_C(0xbf66a804b64ef628), UINT64_C(0xc5bed8cc867b7f51),
  1155. UINT64_C(0x8aeeace74e645255), UINT64_C(0xf036dc2f7e51db2c),
  1156. UINT64_C(0x7f5e4d772e0f40a7), UINT64_C(0x05863dbf1e3ac9de),
  1157. UINT64_C(0xe1fea520be311aaf), UINT64_C(0x9b26d5e88e0493d6),
  1158. UINT64_C(0x144e44b0de5a085d), UINT64_C(0x6e963478ee6f8124),
  1159. UINT64_C(0x21c640532670ac20), UINT64_C(0x5b1e309b16452559),
  1160. UINT64_C(0xd476a1c3461bbed2), UINT64_C(0xaeaed10b762e37ab),
  1161. UINT64_C(0x37deb6af5e9b8b5b), UINT64_C(0x4d06c6676eae0222),
  1162. UINT64_C(0xc26e573f3ef099a9), UINT64_C(0xb8b627f70ec510d0),
  1163. UINT64_C(0xf7e653dcc6da3dd4), UINT64_C(0x8d3e2314f6efb4ad),
  1164. UINT64_C(0x0256b24ca6b12f26), UINT64_C(0x788ec2849684a65f),
  1165. UINT64_C(0x9cf65a1b368f752e), UINT64_C(0xe62e2ad306bafc57),
  1166. UINT64_C(0x6946bb8b56e467dc), UINT64_C(0x139ecb4366d1eea5),
  1167. UINT64_C(0x5ccebf68aecec3a1), UINT64_C(0x2616cfa09efb4ad8),
  1168. UINT64_C(0xa97e5ef8cea5d153), UINT64_C(0xd3a62e30fe90582a),
  1169. UINT64_C(0xb0c7b7e3c7593bd8), UINT64_C(0xca1fc72bf76cb2a1),
  1170. UINT64_C(0x45775673a732292a), UINT64_C(0x3faf26bb9707a053),
  1171. UINT64_C(0x70ff52905f188d57), UINT64_C(0x0a2722586f2d042e),
  1172. UINT64_C(0x854fb3003f739fa5), UINT64_C(0xff97c3c80f4616dc),
  1173. UINT64_C(0x1bef5b57af4dc5ad), UINT64_C(0x61372b9f9f784cd4),
  1174. UINT64_C(0xee5fbac7cf26d75f), UINT64_C(0x9487ca0fff135e26),
  1175. UINT64_C(0xdbd7be24370c7322), UINT64_C(0xa10fceec0739fa5b),
  1176. UINT64_C(0x2e675fb4576761d0), UINT64_C(0x54bf2f7c6752e8a9),
  1177. UINT64_C(0xcdcf48d84fe75459), UINT64_C(0xb71738107fd2dd20),
  1178. UINT64_C(0x387fa9482f8c46ab), UINT64_C(0x42a7d9801fb9cfd2),
  1179. UINT64_C(0x0df7adabd7a6e2d6), UINT64_C(0x772fdd63e7936baf),
  1180. UINT64_C(0xf8474c3bb7cdf024), UINT64_C(0x829f3cf387f8795d),
  1181. UINT64_C(0x66e7a46c27f3aa2c), UINT64_C(0x1c3fd4a417c62355),
  1182. UINT64_C(0x935745fc4798b8de), UINT64_C(0xe98f353477ad31a7),
  1183. UINT64_C(0xa6df411fbfb21ca3), UINT64_C(0xdc0731d78f8795da),
  1184. UINT64_C(0x536fa08fdfd90e51), UINT64_C(0x29b7d047efec8728),
  1185. };
  1186. uint64_t enet_crc64(const ENetBuffer* buffers, int bufferCount) {
  1187. uint64_t crc = 0xFFFFFFFFFFFFFFFF;
  1188. while (bufferCount-- > 0) {
  1189. const uint8_t* data = (const uint8_t*)buffers->data;
  1190. const uint8_t* dataEnd = &data[buffers->dataLength];
  1191. while (data < dataEnd) {
  1192. crc = (crc >> 8) ^ crcTable[(uint8_t)crc ^ *data++];
  1193. }
  1194. ++buffers;
  1195. }
  1196. return ENET_HOST_TO_NET_64(~crc);
  1197. }
  1198. /*
  1199. =======================================================================
  1200. Packet
  1201. =======================================================================
  1202. */
  1203. ENetPacket* enet_packet_create(const void* data, size_t dataLength, uint32_t flags) {
  1204. ENetPacket* packet;
  1205. if (flags & ENET_PACKET_FLAG_NO_ALLOCATE) {
  1206. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket));
  1207. if (packet == NULL)
  1208. return NULL;
  1209. packet->data = (uint8_t*)data;
  1210. }
  1211. else {
  1212. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket) + dataLength);
  1213. if (packet == NULL)
  1214. return NULL;
  1215. packet->data = (uint8_t*)packet + sizeof(ENetPacket);
  1216. if (data != NULL)
  1217. memcpy(packet->data, data, dataLength);
  1218. }
  1219. packet->referenceCount = 0;
  1220. packet->flags = flags;
  1221. packet->dataLength = dataLength;
  1222. packet->freeCallback = NULL;
  1223. packet->userData = NULL;
  1224. return packet;
  1225. }
  1226. ENetPacket* enet_packet_create_offset(const void* data, size_t dataLength, size_t dataOffset, uint32_t flags) {
  1227. ENetPacket* packet;
  1228. if (flags & ENET_PACKET_FLAG_NO_ALLOCATE) {
  1229. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket));
  1230. if (packet == NULL)
  1231. return NULL;
  1232. packet->data = (uint8_t*)data;
  1233. }
  1234. else {
  1235. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket) + dataLength - dataOffset);
  1236. if (packet == NULL)
  1237. return NULL;
  1238. packet->data = (uint8_t*)packet + sizeof(ENetPacket);
  1239. if (data != NULL)
  1240. memcpy(packet->data, (char*)data + dataOffset, dataLength - dataOffset);
  1241. }
  1242. packet->referenceCount = 0;
  1243. packet->flags = flags;
  1244. packet->dataLength = dataLength - dataOffset;
  1245. packet->freeCallback = NULL;
  1246. packet->userData = NULL;
  1247. return packet;
  1248. }
  1249. void enet_packet_destroy(ENetPacket* packet) {
  1250. if (packet == NULL)
  1251. return;
  1252. if (packet->freeCallback != NULL)
  1253. (*packet->freeCallback)((void*)packet);
  1254. enet_free(packet);
  1255. }
  1256. /*
  1257. =======================================================================
  1258. Protocol
  1259. =======================================================================
  1260. */
  1261. static size_t commandSizes[ENET_PROTOCOL_COMMAND_COUNT] = {
  1262. 0,
  1263. sizeof(ENetProtocolAcknowledge),
  1264. sizeof(ENetProtocolConnect),
  1265. sizeof(ENetProtocolVerifyConnect),
  1266. sizeof(ENetProtocolDisconnect),
  1267. sizeof(ENetProtocolPing),
  1268. sizeof(ENetProtocolSendReliable),
  1269. sizeof(ENetProtocolSendUnreliable),
  1270. sizeof(ENetProtocolSendFragment),
  1271. sizeof(ENetProtocolSendUnsequenced),
  1272. sizeof(ENetProtocolBandwidthLimit),
  1273. sizeof(ENetProtocolThrottleConfigure),
  1274. sizeof(ENetProtocolSendFragment)
  1275. };
  1276. size_t enet_protocol_command_size(uint8_t commandNumber) {
  1277. return commandSizes[commandNumber & ENET_PROTOCOL_COMMAND_MASK];
  1278. }
  1279. static void enet_protocol_change_state(ENetHost* host, ENetPeer* peer, ENetPeerState state) {
  1280. if (state == ENET_PEER_STATE_CONNECTED || state == ENET_PEER_STATE_DISCONNECT_LATER)
  1281. enet_peer_on_connect(peer);
  1282. else
  1283. enet_peer_on_disconnect(peer);
  1284. peer->state = state;
  1285. }
  1286. static void enet_protocol_dispatch_state(ENetHost* host, ENetPeer* peer, ENetPeerState state) {
  1287. enet_protocol_change_state(host, peer, state);
  1288. if (!peer->needsDispatch) {
  1289. enet_list_insert(enet_list_end(&host->dispatchQueue), &peer->dispatchList);
  1290. peer->needsDispatch = 1;
  1291. }
  1292. }
  1293. static int enet_protocol_dispatch_incoming_commands(ENetHost* host, ENetEvent* event) {
  1294. while (!enet_list_empty(&host->dispatchQueue)) {
  1295. ENetPeer* peer = (ENetPeer*)enet_list_remove(enet_list_begin(&host->dispatchQueue));
  1296. peer->needsDispatch = 0;
  1297. switch (peer->state) {
  1298. case ENET_PEER_STATE_CONNECTION_PENDING:
  1299. case ENET_PEER_STATE_CONNECTION_SUCCEEDED:
  1300. enet_protocol_change_state(host, peer, ENET_PEER_STATE_CONNECTED);
  1301. event->type = ENET_EVENT_TYPE_CONNECT;
  1302. event->peer = peer;
  1303. event->data = peer->eventData;
  1304. return 1;
  1305. case ENET_PEER_STATE_ZOMBIE:
  1306. host->recalculateBandwidthLimits = 1;
  1307. event->type = ENET_EVENT_TYPE_DISCONNECT;
  1308. event->peer = peer;
  1309. event->data = peer->eventData;
  1310. enet_peer_reset(peer);
  1311. return 1;
  1312. case ENET_PEER_STATE_CONNECTED:
  1313. if (enet_list_empty(&peer->dispatchedCommands))
  1314. continue;
  1315. event->packet = enet_peer_receive(peer, &event->channelID);
  1316. if (event->packet == NULL)
  1317. continue;
  1318. event->type = ENET_EVENT_TYPE_RECEIVE;
  1319. event->peer = peer;
  1320. if (!enet_list_empty(&peer->dispatchedCommands)) {
  1321. peer->needsDispatch = 1;
  1322. enet_list_insert(enet_list_end(&host->dispatchQueue), &peer->dispatchList);
  1323. }
  1324. return 1;
  1325. default:
  1326. break;
  1327. }
  1328. }
  1329. return 0;
  1330. }
  1331. static void enet_protocol_notify_connect(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  1332. host->recalculateBandwidthLimits = 1;
  1333. if (event != NULL) {
  1334. enet_protocol_change_state(host, peer, ENET_PEER_STATE_CONNECTED);
  1335. peer->totalDataSent = 0;
  1336. peer->totalDataReceived = 0;
  1337. peer->totalPacketsSent = 0;
  1338. peer->totalPacketsLost = 0;
  1339. event->type = ENET_EVENT_TYPE_CONNECT;
  1340. event->peer = peer;
  1341. event->data = peer->eventData;
  1342. }
  1343. else {
  1344. enet_protocol_dispatch_state(host, peer, peer->state == ENET_PEER_STATE_CONNECTING ? ENET_PEER_STATE_CONNECTION_SUCCEEDED : ENET_PEER_STATE_CONNECTION_PENDING);
  1345. }
  1346. }
  1347. static void enet_protocol_notify_disconnect(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  1348. if (peer->state >= ENET_PEER_STATE_CONNECTION_PENDING)
  1349. host->recalculateBandwidthLimits = 1;
  1350. if (peer->state != ENET_PEER_STATE_CONNECTING && peer->state < ENET_PEER_STATE_CONNECTION_SUCCEEDED) {
  1351. enet_peer_reset(peer);
  1352. }
  1353. else if (event != NULL) {
  1354. event->type = ENET_EVENT_TYPE_DISCONNECT;
  1355. event->peer = peer;
  1356. event->data = 0;
  1357. enet_peer_reset(peer);
  1358. }
  1359. else {
  1360. peer->eventData = 0;
  1361. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1362. }
  1363. }
  1364. static void enet_protocol_notify_disconnect_timeout(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  1365. if (peer->state >= ENET_PEER_STATE_CONNECTION_PENDING)
  1366. host->recalculateBandwidthLimits = 1;
  1367. if (peer->state != ENET_PEER_STATE_CONNECTING && peer->state < ENET_PEER_STATE_CONNECTION_SUCCEEDED) {
  1368. enet_peer_reset(peer);
  1369. }
  1370. else if (event != NULL) {
  1371. event->type = ENET_EVENT_TYPE_DISCONNECT_TIMEOUT;
  1372. event->peer = peer;
  1373. event->data = 0;
  1374. enet_peer_reset(peer);
  1375. }
  1376. else {
  1377. peer->eventData = 0;
  1378. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1379. }
  1380. }
  1381. static void enet_protocol_remove_sent_unreliable_commands(ENetPeer* peer) {
  1382. ENetOutgoingCommand* outgoingCommand;
  1383. if (enet_list_empty(&peer->sentUnreliableCommands))
  1384. return;
  1385. do {
  1386. outgoingCommand = (ENetOutgoingCommand*)enet_list_front(&peer->sentUnreliableCommands);
  1387. enet_list_remove(&outgoingCommand->outgoingCommandList);
  1388. if (outgoingCommand->packet != NULL) {
  1389. --outgoingCommand->packet->referenceCount;
  1390. if (outgoingCommand->packet->referenceCount == 0) {
  1391. outgoingCommand->packet->flags |= ENET_PACKET_FLAG_SENT;
  1392. enet_packet_destroy(outgoingCommand->packet);
  1393. }
  1394. }
  1395. enet_free(outgoingCommand);
  1396. }
  1397. while (!enet_list_empty(&peer->sentUnreliableCommands));
  1398. if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER && enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands))
  1399. enet_peer_disconnect(peer, peer->eventData);
  1400. }
  1401. static ENetProtocolCommand enet_protocol_remove_sent_reliable_command(ENetPeer* peer, uint16_t reliableSequenceNumber, uint8_t channelID) {
  1402. ENetOutgoingCommand* outgoingCommand = NULL;
  1403. ENetListIterator currentCommand;
  1404. ENetProtocolCommand commandNumber;
  1405. int wasSent = 1;
  1406. for (currentCommand = enet_list_begin(&peer->sentReliableCommands); currentCommand != enet_list_end(&peer->sentReliableCommands); currentCommand = enet_list_next(currentCommand)) {
  1407. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  1408. if (outgoingCommand->reliableSequenceNumber == reliableSequenceNumber && outgoingCommand->command.header.channelID == channelID)
  1409. break;
  1410. }
  1411. if (currentCommand == enet_list_end(&peer->sentReliableCommands)) {
  1412. for (currentCommand = enet_list_begin(&peer->outgoingCommands); currentCommand != enet_list_end(&peer->outgoingCommands); currentCommand = enet_list_next(currentCommand)) {
  1413. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  1414. if (outgoingCommand->sendAttempts < 1)
  1415. return ENET_PROTOCOL_COMMAND_NONE;
  1416. if (outgoingCommand->reliableSequenceNumber == reliableSequenceNumber && outgoingCommand->command.header.channelID == channelID)
  1417. break;
  1418. }
  1419. if (currentCommand == enet_list_end(&peer->outgoingCommands))
  1420. return ENET_PROTOCOL_COMMAND_NONE;
  1421. wasSent = 0;
  1422. }
  1423. if (outgoingCommand == NULL)
  1424. return ENET_PROTOCOL_COMMAND_NONE;
  1425. if (channelID < peer->channelCount) {
  1426. ENetChannel* channel = &peer->channels[channelID];
  1427. uint16_t reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1428. if (channel->reliableWindows[reliableWindow] > 0) {
  1429. --channel->reliableWindows[reliableWindow];
  1430. if (!channel->reliableWindows[reliableWindow])
  1431. channel->usedReliableWindows &= ~(1 << reliableWindow);
  1432. }
  1433. }
  1434. commandNumber = (ENetProtocolCommand)(outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK);
  1435. enet_list_remove(&outgoingCommand->outgoingCommandList);
  1436. if (outgoingCommand->packet != NULL) {
  1437. if (wasSent)
  1438. peer->reliableDataInTransit -= outgoingCommand->fragmentLength;
  1439. --outgoingCommand->packet->referenceCount;
  1440. if (outgoingCommand->packet->referenceCount == 0) {
  1441. outgoingCommand->packet->flags |= ENET_PACKET_FLAG_SENT;
  1442. enet_packet_destroy(outgoingCommand->packet);
  1443. }
  1444. }
  1445. enet_free(outgoingCommand);
  1446. if (enet_list_empty(&peer->sentReliableCommands))
  1447. return commandNumber;
  1448. outgoingCommand = (ENetOutgoingCommand*)enet_list_front(&peer->sentReliableCommands);
  1449. peer->nextTimeout = outgoingCommand->sentTime + outgoingCommand->roundTripTimeout;
  1450. return commandNumber;
  1451. }
  1452. static ENetPeer* enet_protocol_handle_connect(ENetHost* host, ENetProtocolHeader* header, ENetProtocol* command) {
  1453. uint8_t incomingSessionID, outgoingSessionID;
  1454. uint32_t mtu, windowSize;
  1455. ENetChannel* channel;
  1456. size_t channelCount, duplicatePeers = 0;
  1457. ENetPeer* currentPeer, * peer = NULL;
  1458. ENetProtocol verifyCommand;
  1459. channelCount = ENET_NET_TO_HOST_32(command->connect.channelCount);
  1460. if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT || channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  1461. return NULL;
  1462. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  1463. if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED) {
  1464. if (peer == NULL)
  1465. peer = currentPeer;
  1466. }
  1467. else if (currentPeer->state != ENET_PEER_STATE_CONNECTING && enet_in6_equal(currentPeer->address.ipv6, host->receivedAddress.ipv6)) {
  1468. if (currentPeer->address.port == host->receivedAddress.port && currentPeer->connectID == command->connect.connectID)
  1469. return NULL;
  1470. ++duplicatePeers;
  1471. }
  1472. }
  1473. if (peer == NULL || duplicatePeers >= host->duplicatePeers)
  1474. return NULL;
  1475. if (channelCount > host->channelLimit)
  1476. channelCount = host->channelLimit;
  1477. peer->channels = (ENetChannel*)enet_malloc(channelCount * sizeof(ENetChannel));
  1478. if (peer->channels == NULL)
  1479. return NULL;
  1480. peer->channelCount = channelCount;
  1481. peer->state = ENET_PEER_STATE_ACKNOWLEDGING_CONNECT;
  1482. peer->connectID = command->connect.connectID;
  1483. peer->address = host->receivedAddress;
  1484. peer->outgoingPeerID = ENET_NET_TO_HOST_16(command->connect.outgoingPeerID);
  1485. peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->connect.incomingBandwidth);
  1486. peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->connect.outgoingBandwidth);
  1487. peer->packetThrottleInterval = ENET_NET_TO_HOST_32(command->connect.packetThrottleInterval);
  1488. peer->packetThrottleAcceleration = ENET_NET_TO_HOST_32(command->connect.packetThrottleAcceleration);
  1489. peer->packetThrottleDeceleration = ENET_NET_TO_HOST_32(command->connect.packetThrottleDeceleration);
  1490. peer->eventData = ENET_NET_TO_HOST_32(command->connect.data);
  1491. incomingSessionID = command->connect.incomingSessionID == 0xFF ? peer->outgoingSessionID : command->connect.incomingSessionID;
  1492. incomingSessionID = (incomingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1493. if (incomingSessionID == peer->outgoingSessionID)
  1494. incomingSessionID = (incomingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1495. peer->outgoingSessionID = incomingSessionID;
  1496. outgoingSessionID = command->connect.outgoingSessionID == 0xFF ? peer->incomingSessionID : command->connect.outgoingSessionID;
  1497. outgoingSessionID = (outgoingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1498. if (outgoingSessionID == peer->incomingSessionID)
  1499. outgoingSessionID = (outgoingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1500. peer->incomingSessionID = outgoingSessionID;
  1501. for (channel = peer->channels; channel < &peer->channels[channelCount]; ++channel) {
  1502. channel->outgoingReliableSequenceNumber = 0;
  1503. channel->outgoingUnreliableSequenceNumber = 0;
  1504. channel->incomingReliableSequenceNumber = 0;
  1505. channel->incomingUnreliableSequenceNumber = 0;
  1506. enet_list_clear(&channel->incomingReliableCommands);
  1507. enet_list_clear(&channel->incomingUnreliableCommands);
  1508. channel->usedReliableWindows = 0;
  1509. memset(channel->reliableWindows, 0, sizeof(channel->reliableWindows));
  1510. }
  1511. mtu = ENET_NET_TO_HOST_32(command->connect.mtu);
  1512. if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
  1513. mtu = ENET_PROTOCOL_MINIMUM_MTU;
  1514. else if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
  1515. mtu = ENET_PROTOCOL_MAXIMUM_MTU;
  1516. peer->mtu = mtu;
  1517. if (host->outgoingBandwidth == 0 && peer->incomingBandwidth == 0)
  1518. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1519. else if (host->outgoingBandwidth == 0 || peer->incomingBandwidth == 0)
  1520. peer->windowSize = (ENET_MAX(host->outgoingBandwidth, peer->incomingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1521. else
  1522. peer->windowSize = (ENET_MIN(host->outgoingBandwidth, peer->incomingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1523. if (peer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1524. peer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1525. else if (peer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1526. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1527. if (host->incomingBandwidth == 0)
  1528. windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1529. else
  1530. windowSize = (host->incomingBandwidth / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1531. if (windowSize > ENET_NET_TO_HOST_32(command->connect.windowSize))
  1532. windowSize = ENET_NET_TO_HOST_32(command->connect.windowSize);
  1533. if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1534. windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1535. else if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1536. windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1537. verifyCommand.header.command = ENET_PROTOCOL_COMMAND_VERIFY_CONNECT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  1538. verifyCommand.header.channelID = 0xFF;
  1539. verifyCommand.verifyConnect.outgoingPeerID = ENET_HOST_TO_NET_16(peer->incomingPeerID);
  1540. verifyCommand.verifyConnect.incomingSessionID = incomingSessionID;
  1541. verifyCommand.verifyConnect.outgoingSessionID = outgoingSessionID;
  1542. verifyCommand.verifyConnect.mtu = ENET_HOST_TO_NET_32(peer->mtu);
  1543. verifyCommand.verifyConnect.windowSize = ENET_HOST_TO_NET_32(windowSize);
  1544. verifyCommand.verifyConnect.channelCount = ENET_HOST_TO_NET_32(channelCount);
  1545. verifyCommand.verifyConnect.incomingBandwidth = ENET_HOST_TO_NET_32(host->incomingBandwidth);
  1546. verifyCommand.verifyConnect.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
  1547. verifyCommand.verifyConnect.packetThrottleInterval = ENET_HOST_TO_NET_32(peer->packetThrottleInterval);
  1548. verifyCommand.verifyConnect.packetThrottleAcceleration = ENET_HOST_TO_NET_32(peer->packetThrottleAcceleration);
  1549. verifyCommand.verifyConnect.packetThrottleDeceleration = ENET_HOST_TO_NET_32(peer->packetThrottleDeceleration);
  1550. verifyCommand.verifyConnect.connectID = peer->connectID;
  1551. enet_peer_queue_outgoing_command(peer, &verifyCommand, NULL, 0, 0);
  1552. return peer;
  1553. }
  1554. static int enet_protocol_handle_send_reliable(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
  1555. size_t dataLength;
  1556. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1557. ENET_LOG_ERROR("Destination Channel ID is greater than the Peer's Channel count, or the Peer isn't connected or pending disconnection later.");
  1558. return -1;
  1559. }
  1560. dataLength = ENET_NET_TO_HOST_16(command->sendReliable.dataLength);
  1561. *currentData += dataLength;
  1562. if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1563. ENET_LOG_ERROR("Packet has a data length error.");
  1564. return -1;
  1565. }
  1566. if (enet_peer_queue_incoming_command(peer, command, (const uint8_t*)command + sizeof(ENetProtocolSendReliable), dataLength, ENET_PACKET_FLAG_RELIABLE, 0) == NULL) {
  1567. ENET_LOG_ERROR("NULL was returned trying to queue a Command from a Peer.");
  1568. return -1;
  1569. }
  1570. return 0;
  1571. }
  1572. static int enet_protocol_handle_send_unsequenced(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
  1573. uint32_t unsequencedGroup, index;
  1574. size_t dataLength;
  1575. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1576. ENET_LOG_ERROR("Destination Channel ID is greater than the Peer's Channel count, or the Peer isn't connected or pending disconnection later.");
  1577. return -1;
  1578. }
  1579. dataLength = ENET_NET_TO_HOST_16(command->sendUnsequenced.dataLength);
  1580. *currentData += dataLength;
  1581. if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1582. ENET_LOG_ERROR("Packet has a data length error.");
  1583. return -1;
  1584. }
  1585. unsequencedGroup = ENET_NET_TO_HOST_16(command->sendUnsequenced.unsequencedGroup);
  1586. index = unsequencedGroup % ENET_PEER_UNSEQUENCED_WINDOW_SIZE;
  1587. if (unsequencedGroup < peer->incomingUnsequencedGroup)
  1588. unsequencedGroup += 0x10000;
  1589. if (unsequencedGroup >= (uint32_t)peer->incomingUnsequencedGroup + ENET_PEER_FREE_UNSEQUENCED_WINDOWS * ENET_PEER_UNSEQUENCED_WINDOW_SIZE)
  1590. return 0;
  1591. unsequencedGroup &= 0xFFFF;
  1592. if (unsequencedGroup - index != peer->incomingUnsequencedGroup) {
  1593. peer->incomingUnsequencedGroup = unsequencedGroup - index;
  1594. memset(peer->unsequencedWindow, 0, sizeof(peer->unsequencedWindow));
  1595. }
  1596. else if (peer->unsequencedWindow[index / 32] & (1 << (index % 32))) {
  1597. return 0;
  1598. }
  1599. if (enet_peer_queue_incoming_command(peer, command, (const uint8_t*)command + sizeof(ENetProtocolSendUnsequenced), dataLength, ENET_PACKET_FLAG_UNSEQUENCED, 0) == NULL) {
  1600. ENET_LOG_ERROR("NULL was returned trying to queue a Command from a Peer.");
  1601. return -1;
  1602. }
  1603. peer->unsequencedWindow[index / 32] |= 1 << (index % 32);
  1604. return 0;
  1605. }
  1606. static int enet_protocol_handle_send_unreliable(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
  1607. size_t dataLength;
  1608. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1609. ENET_LOG_ERROR("Destination Channel ID is greater than the Peer's Channel count, or the Peer isn't connected or pending disconnection later.");
  1610. return -1;
  1611. }
  1612. dataLength = ENET_NET_TO_HOST_16(command->sendUnreliable.dataLength);
  1613. *currentData += dataLength;
  1614. if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1615. ENET_LOG_ERROR("Packet has a data length error.");
  1616. return -1;
  1617. }
  1618. if (enet_peer_queue_incoming_command(peer, command, (const uint8_t*)command + sizeof(ENetProtocolSendUnreliable), dataLength, 0, 0) == NULL) {
  1619. ENET_LOG_ERROR("NULL was returned trying to queue a Command from a Peer.");
  1620. return -1;
  1621. }
  1622. return 0;
  1623. }
  1624. static int enet_protocol_handle_send_fragment(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
  1625. uint32_t fragmentNumber, fragmentCount, fragmentOffset, fragmentLength, startSequenceNumber, totalLength;
  1626. ENetChannel* channel;
  1627. uint16_t startWindow, currentWindow;
  1628. ENetListIterator currentCommand;
  1629. ENetIncomingCommand* startCommand = NULL;
  1630. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1631. ENET_LOG_ERROR("Destination Channel ID is greater than the Peer's Channel count, or the Peer isn't connected or pending disconnection later.");
  1632. return -1;
  1633. }
  1634. fragmentLength = ENET_NET_TO_HOST_16(command->sendFragment.dataLength);
  1635. *currentData += fragmentLength;
  1636. if (fragmentLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1637. ENET_LOG_ERROR("Fragmented Packet has a data length error.");
  1638. return -1;
  1639. }
  1640. channel = &peer->channels[command->header.channelID];
  1641. startSequenceNumber = ENET_NET_TO_HOST_16(command->sendFragment.startSequenceNumber);
  1642. startWindow = startSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1643. currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1644. if (startSequenceNumber < channel->incomingReliableSequenceNumber)
  1645. startWindow += ENET_PEER_RELIABLE_WINDOWS;
  1646. if (startWindow < currentWindow || startWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  1647. return 0;
  1648. fragmentNumber = ENET_NET_TO_HOST_32(command->sendFragment.fragmentNumber);
  1649. fragmentCount = ENET_NET_TO_HOST_32(command->sendFragment.fragmentCount);
  1650. fragmentOffset = ENET_NET_TO_HOST_32(command->sendFragment.fragmentOffset);
  1651. totalLength = ENET_NET_TO_HOST_32(command->sendFragment.totalLength);
  1652. if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT || fragmentNumber >= fragmentCount || totalLength > host->maximumPacketSize || fragmentOffset >= totalLength || fragmentLength > totalLength - fragmentOffset) {
  1653. ENET_LOG_ERROR("Fragmented Packet has errors.");
  1654. return -1;
  1655. }
  1656. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingReliableCommands)); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  1657. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  1658. if (startSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1659. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  1660. continue;
  1661. }
  1662. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1663. break;
  1664. }
  1665. if (incomingCommand->reliableSequenceNumber <= startSequenceNumber) {
  1666. if (incomingCommand->reliableSequenceNumber < startSequenceNumber)
  1667. break;
  1668. if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_FRAGMENT || totalLength != incomingCommand->packet->dataLength || fragmentCount != incomingCommand->fragmentCount) {
  1669. ENET_LOG_ERROR("Fragmented Packet has a header command error.");
  1670. return -1;
  1671. }
  1672. startCommand = incomingCommand;
  1673. break;
  1674. }
  1675. }
  1676. if (startCommand == NULL) {
  1677. ENetProtocol hostCommand = *command;
  1678. hostCommand.header.reliableSequenceNumber = startSequenceNumber;
  1679. startCommand = enet_peer_queue_incoming_command(peer, &hostCommand, NULL, totalLength, ENET_PACKET_FLAG_RELIABLE, fragmentCount);
  1680. if (startCommand == NULL) {
  1681. ENET_LOG_ERROR("Packet start command was NULL.");
  1682. return -1;
  1683. }
  1684. }
  1685. if ((startCommand->fragments[fragmentNumber / 32] & (1 << (fragmentNumber % 32))) == 0) {
  1686. --startCommand->fragmentsRemaining;
  1687. startCommand->fragments[fragmentNumber / 32] |= (1 << (fragmentNumber % 32));
  1688. if (fragmentOffset + fragmentLength > startCommand->packet->dataLength)
  1689. fragmentLength = startCommand->packet->dataLength - fragmentOffset;
  1690. memcpy(startCommand->packet->data + fragmentOffset, (uint8_t*)command + sizeof(ENetProtocolSendFragment), fragmentLength);
  1691. if (startCommand->fragmentsRemaining <= 0)
  1692. enet_peer_dispatch_incoming_reliable_commands(peer, channel, NULL);
  1693. }
  1694. return 0;
  1695. }
  1696. static int enet_protocol_handle_send_unreliable_fragment(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, uint8_t** currentData) {
  1697. uint32_t fragmentNumber, fragmentCount, fragmentOffset, fragmentLength, reliableSequenceNumber, startSequenceNumber, totalLength;
  1698. uint16_t reliableWindow, currentWindow;
  1699. ENetChannel* channel;
  1700. ENetListIterator currentCommand;
  1701. ENetIncomingCommand* startCommand = NULL;
  1702. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1703. ENET_LOG_ERROR("Destination Channel ID is greater than the Peer's Channel count, or the Peer isn't connected or pending disconnection later.");
  1704. return -1;
  1705. }
  1706. fragmentLength = ENET_NET_TO_HOST_16(command->sendFragment.dataLength);
  1707. *currentData += fragmentLength;
  1708. if (fragmentLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1709. ENET_LOG_ERROR("Fragmented Packet has errors.");
  1710. return -1;
  1711. }
  1712. channel = &peer->channels[command->header.channelID];
  1713. reliableSequenceNumber = command->header.reliableSequenceNumber;
  1714. startSequenceNumber = ENET_NET_TO_HOST_16(command->sendFragment.startSequenceNumber);
  1715. reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1716. currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1717. if (reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  1718. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  1719. if (reliableWindow < currentWindow || reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  1720. return 0;
  1721. if (reliableSequenceNumber == channel->incomingReliableSequenceNumber && startSequenceNumber <= channel->incomingUnreliableSequenceNumber)
  1722. return 0;
  1723. fragmentNumber = ENET_NET_TO_HOST_32(command->sendFragment.fragmentNumber);
  1724. fragmentCount = ENET_NET_TO_HOST_32(command->sendFragment.fragmentCount);
  1725. fragmentOffset = ENET_NET_TO_HOST_32(command->sendFragment.fragmentOffset);
  1726. totalLength = ENET_NET_TO_HOST_32(command->sendFragment.totalLength);
  1727. if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT || fragmentNumber >= fragmentCount || totalLength > host->maximumPacketSize || fragmentOffset >= totalLength || fragmentLength > totalLength - fragmentOffset) {
  1728. ENET_LOG_ERROR("Packet has exceeded maximum number of fragments, the total length is more than the packet size, the offset is out of bounds or the fragment is too big");
  1729. return -1;
  1730. }
  1731. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingUnreliableCommands)); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  1732. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  1733. if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1734. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  1735. continue;
  1736. }
  1737. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1738. break;
  1739. }
  1740. if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
  1741. break;
  1742. if (incomingCommand->reliableSequenceNumber > reliableSequenceNumber)
  1743. continue;
  1744. if (incomingCommand->unreliableSequenceNumber <= startSequenceNumber) {
  1745. if (incomingCommand->unreliableSequenceNumber < startSequenceNumber)
  1746. break;
  1747. if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT || totalLength != incomingCommand->packet->dataLength || fragmentCount != incomingCommand->fragmentCount) {
  1748. ENET_LOG_ERROR("Fragmented Packet has a header command error.");
  1749. return -1;
  1750. }
  1751. startCommand = incomingCommand;
  1752. break;
  1753. }
  1754. }
  1755. if (startCommand == NULL) {
  1756. startCommand = enet_peer_queue_incoming_command(peer, command, NULL, totalLength, ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED, fragmentCount);
  1757. if (startCommand == NULL) {
  1758. ENET_LOG_ERROR("Packet start command was NULL.");
  1759. return -1;
  1760. }
  1761. }
  1762. if ((startCommand->fragments[fragmentNumber / 32] & (1 << (fragmentNumber % 32))) == 0) {
  1763. --startCommand->fragmentsRemaining;
  1764. startCommand->fragments[fragmentNumber / 32] |= (1 << (fragmentNumber % 32));
  1765. if (fragmentOffset + fragmentLength > startCommand->packet->dataLength)
  1766. fragmentLength = startCommand->packet->dataLength - fragmentOffset;
  1767. memcpy(startCommand->packet->data + fragmentOffset, (uint8_t*)command + sizeof(ENetProtocolSendFragment), fragmentLength);
  1768. if (startCommand->fragmentsRemaining <= 0)
  1769. enet_peer_dispatch_incoming_unreliable_commands(peer, channel, NULL);
  1770. }
  1771. return 0;
  1772. }
  1773. static int enet_protocol_handle_ping(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1774. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1775. ENET_LOG_ERROR("Tried to handle a ping from a Peer neither in Connected or Disconnect Later state.");
  1776. return -1;
  1777. }
  1778. return 0;
  1779. }
  1780. static int enet_protocol_handle_bandwidth_limit(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1781. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1782. ENET_LOG_ERROR("Tried to handle bandwidth limiting a Peer that is neither in Connected or Disconnect Later state.");
  1783. return -1;
  1784. }
  1785. if (peer->incomingBandwidth != 0)
  1786. --host->bandwidthLimitedPeers;
  1787. peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->bandwidthLimit.incomingBandwidth);
  1788. peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->bandwidthLimit.outgoingBandwidth);
  1789. if (peer->incomingBandwidth != 0)
  1790. ++host->bandwidthLimitedPeers;
  1791. if (peer->incomingBandwidth == 0 && host->outgoingBandwidth == 0)
  1792. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1793. else if (peer->incomingBandwidth == 0 || host->outgoingBandwidth == 0)
  1794. peer->windowSize = (ENET_MAX(peer->incomingBandwidth, host->outgoingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1795. else
  1796. peer->windowSize = (ENET_MIN(peer->incomingBandwidth, host->outgoingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1797. if (peer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1798. peer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1799. else if (peer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1800. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1801. return 0;
  1802. }
  1803. static int enet_protocol_handle_throttle_configure(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1804. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1805. ENET_LOG_ERROR("Peer is not Connected or in Disconnect Later state.");
  1806. return -1;
  1807. }
  1808. peer->packetThrottleInterval = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleInterval);
  1809. peer->packetThrottleAcceleration = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleAcceleration);
  1810. peer->packetThrottleDeceleration = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleDeceleration);
  1811. return 0;
  1812. }
  1813. static int enet_protocol_handle_disconnect(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1814. if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE || peer->state == ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT)
  1815. return 0;
  1816. enet_peer_reset_queues(peer);
  1817. if (peer->state == ENET_PEER_STATE_CONNECTION_SUCCEEDED || peer->state == ENET_PEER_STATE_DISCONNECTING || peer->state == ENET_PEER_STATE_CONNECTING) {
  1818. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1819. }
  1820. else if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1821. if (peer->state == ENET_PEER_STATE_CONNECTION_PENDING)
  1822. host->recalculateBandwidthLimits = 1;
  1823. enet_peer_reset(peer);
  1824. }
  1825. else if (command->header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
  1826. enet_protocol_change_state(host, peer, ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT);
  1827. }
  1828. else {
  1829. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1830. }
  1831. if (peer->state != ENET_PEER_STATE_DISCONNECTED)
  1832. peer->eventData = ENET_NET_TO_HOST_32(command->disconnect.data);
  1833. return 0;
  1834. }
  1835. static int enet_protocol_handle_acknowledge(ENetHost* host, ENetEvent* event, ENetPeer* peer, const ENetProtocol* command) {
  1836. uint32_t roundTripTime, receivedSentTime, receivedReliableSequenceNumber;
  1837. ENetProtocolCommand commandNumber;
  1838. if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE)
  1839. return 0;
  1840. receivedSentTime = ENET_NET_TO_HOST_16(command->acknowledge.receivedSentTime);
  1841. receivedSentTime |= host->serviceTime & 0xFFFF0000;
  1842. if ((receivedSentTime & 0x8000) > (host->serviceTime & 0x8000))
  1843. receivedSentTime -= 0x10000;
  1844. if (ENET_TIME_LESS(host->serviceTime, receivedSentTime))
  1845. return 0;
  1846. roundTripTime = ENET_TIME_DIFFERENCE(host->serviceTime, receivedSentTime);
  1847. if (roundTripTime == 0)
  1848. roundTripTime = 1;
  1849. enet_peer_throttle(peer, roundTripTime);
  1850. if (peer->lastReceiveTime > 0) {
  1851. if (roundTripTime >= peer->roundTripTime) {
  1852. uint32_t diff = roundTripTime - peer->roundTripTime;
  1853. peer->roundTripTimeVariance -= peer->roundTripTimeVariance / 4;
  1854. peer->roundTripTimeVariance += diff / 4;
  1855. peer->roundTripTime += diff / 8;
  1856. }
  1857. else {
  1858. uint32_t diff = peer->roundTripTime - roundTripTime;
  1859. if (diff <= peer->roundTripTimeVariance) {
  1860. peer->roundTripTimeVariance -= peer->roundTripTimeVariance / 4;
  1861. peer->roundTripTimeVariance += diff / 4;
  1862. }
  1863. else {
  1864. peer->roundTripTimeVariance -= peer->roundTripTimeVariance / 32;
  1865. peer->roundTripTimeVariance += diff / 32;
  1866. }
  1867. peer->roundTripTime -= diff / 8;
  1868. }
  1869. }
  1870. else {
  1871. peer->roundTripTime = roundTripTime;
  1872. peer->roundTripTimeVariance = roundTripTime / 2;
  1873. }
  1874. if (peer->roundTripTime < peer->lowestRoundTripTime)
  1875. peer->lowestRoundTripTime = peer->roundTripTime;
  1876. if (peer->roundTripTimeVariance > peer->highestRoundTripTimeVariance)
  1877. peer->highestRoundTripTimeVariance = peer->roundTripTimeVariance;
  1878. if (peer->packetThrottleEpoch == 0 || ENET_TIME_DIFFERENCE(host->serviceTime, peer->packetThrottleEpoch) >= peer->packetThrottleInterval) {
  1879. peer->lastRoundTripTime = peer->lowestRoundTripTime;
  1880. peer->lastRoundTripTimeVariance = peer->highestRoundTripTimeVariance;
  1881. peer->lowestRoundTripTime = peer->roundTripTime;
  1882. peer->highestRoundTripTimeVariance = peer->roundTripTimeVariance;
  1883. peer->packetThrottleEpoch = host->serviceTime;
  1884. }
  1885. peer->lastReceiveTime = ENET_MAX(host->serviceTime, 1);
  1886. peer->earliestTimeout = 0;
  1887. receivedReliableSequenceNumber = ENET_NET_TO_HOST_16(command->acknowledge.receivedReliableSequenceNumber);
  1888. commandNumber = enet_protocol_remove_sent_reliable_command(peer, receivedReliableSequenceNumber, command->header.channelID);
  1889. switch (peer->state) {
  1890. case ENET_PEER_STATE_ACKNOWLEDGING_CONNECT:
  1891. if (commandNumber != ENET_PROTOCOL_COMMAND_VERIFY_CONNECT) {
  1892. ENET_LOG_ERROR("Wrong command number. Got %u vs %u.", commandNumber, ENET_PROTOCOL_COMMAND_VERIFY_CONNECT);
  1893. return -1;
  1894. }
  1895. enet_protocol_notify_connect(host, peer, event);
  1896. break;
  1897. case ENET_PEER_STATE_DISCONNECTING:
  1898. if (commandNumber != ENET_PROTOCOL_COMMAND_DISCONNECT) {
  1899. ENET_LOG_ERROR("Wrong command number. Got %u vs %u.", commandNumber, ENET_PROTOCOL_COMMAND_VERIFY_CONNECT);
  1900. return -1;
  1901. }
  1902. enet_protocol_notify_disconnect(host, peer, event);
  1903. break;
  1904. case ENET_PEER_STATE_DISCONNECT_LATER:
  1905. if (enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands))
  1906. enet_peer_disconnect(peer, peer->eventData);
  1907. break;
  1908. default:
  1909. break;
  1910. }
  1911. return 0;
  1912. }
  1913. static int enet_protocol_handle_verify_connect(ENetHost* host, ENetEvent* event, ENetPeer* peer, const ENetProtocol* command) {
  1914. uint32_t mtu, windowSize;
  1915. size_t channelCount;
  1916. if (peer->state != ENET_PEER_STATE_CONNECTING)
  1917. return 0;
  1918. channelCount = ENET_NET_TO_HOST_32(command->verifyConnect.channelCount);
  1919. if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT || channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT || ENET_NET_TO_HOST_32(command->verifyConnect.packetThrottleInterval) != peer->packetThrottleInterval || ENET_NET_TO_HOST_32(command->verifyConnect.packetThrottleAcceleration) != peer->packetThrottleAcceleration || ENET_NET_TO_HOST_32(command->verifyConnect.packetThrottleDeceleration) != peer->packetThrottleDeceleration || command->verifyConnect.connectID != peer->connectID) {
  1920. peer->eventData = 0;
  1921. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1922. ENET_LOG_ERROR("Zombie peer detected!");
  1923. return -1;
  1924. }
  1925. enet_protocol_remove_sent_reliable_command(peer, 1, 0xFF);
  1926. if (channelCount < peer->channelCount)
  1927. peer->channelCount = channelCount;
  1928. peer->outgoingPeerID = ENET_NET_TO_HOST_16(command->verifyConnect.outgoingPeerID);
  1929. peer->incomingSessionID = command->verifyConnect.incomingSessionID;
  1930. peer->outgoingSessionID = command->verifyConnect.outgoingSessionID;
  1931. mtu = ENET_NET_TO_HOST_32(command->verifyConnect.mtu);
  1932. if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
  1933. mtu = ENET_PROTOCOL_MINIMUM_MTU;
  1934. else if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
  1935. mtu = ENET_PROTOCOL_MAXIMUM_MTU;
  1936. if (mtu < peer->mtu)
  1937. peer->mtu = mtu;
  1938. windowSize = ENET_NET_TO_HOST_32(command->verifyConnect.windowSize);
  1939. if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1940. windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1941. if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1942. windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1943. if (windowSize < peer->windowSize)
  1944. peer->windowSize = windowSize;
  1945. peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->verifyConnect.incomingBandwidth);
  1946. peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->verifyConnect.outgoingBandwidth);
  1947. enet_protocol_notify_connect(host, peer, event);
  1948. return 0;
  1949. }
  1950. static int enet_protocol_handle_incoming_commands(ENetHost* host, ENetEvent* event) {
  1951. ENetProtocolHeader* header;
  1952. ENetProtocol* command;
  1953. ENetPeer* peer;
  1954. uint8_t* currentData;
  1955. size_t headerSize;
  1956. uint16_t peerID, flags;
  1957. uint8_t sessionID;
  1958. if (host->receivedDataLength < (size_t) & ((ENetProtocolHeader*)0)->sentTime)
  1959. return 0;
  1960. header = (ENetProtocolHeader*)host->receivedData;
  1961. peerID = ENET_NET_TO_HOST_16(header->peerID);
  1962. sessionID = (peerID & ENET_PROTOCOL_HEADER_SESSION_MASK) >> ENET_PROTOCOL_HEADER_SESSION_SHIFT;
  1963. flags = peerID & ENET_PROTOCOL_HEADER_FLAG_MASK;
  1964. peerID &= ~(ENET_PROTOCOL_HEADER_FLAG_MASK | ENET_PROTOCOL_HEADER_SESSION_MASK);
  1965. headerSize = (flags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME ? sizeof(ENetProtocolHeader) : (size_t) & ((ENetProtocolHeader*)0)->sentTime);
  1966. if (host->checksumCallback != NULL)
  1967. headerSize += sizeof(uint64_t);
  1968. if (peerID == ENET_PROTOCOL_MAXIMUM_PEER_ID) {
  1969. peer = NULL;
  1970. }
  1971. else if (peerID >= host->peerCount) {
  1972. return 0;
  1973. }
  1974. else {
  1975. peer = &host->peers[peerID];
  1976. if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE || ((!enet_in6_equal(host->receivedAddress.ipv6, peer->address.ipv6) || host->receivedAddress.port != peer->address.port) && peer->address.ipv4.ip.s_addr != INADDR_BROADCAST) || (peer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID && sessionID != peer->incomingSessionID))
  1977. return 0;
  1978. }
  1979. if (host->checksumCallback != NULL) {
  1980. uint64_t* checksum = (uint64_t*)&host->receivedData[headerSize - sizeof(uint64_t)];
  1981. uint64_t desiredChecksum = *checksum;
  1982. ENetBuffer buffer;
  1983. *checksum = peer != NULL ? peer->connectID : 0;
  1984. buffer.data = host->receivedData;
  1985. buffer.dataLength = host->receivedDataLength;
  1986. if (host->checksumCallback(&buffer, 1) != desiredChecksum)
  1987. return 0;
  1988. }
  1989. if (peer != NULL) {
  1990. peer->address.ipv6 = host->receivedAddress.ipv6;
  1991. peer->address.port = host->receivedAddress.port;
  1992. peer->incomingDataTotal += host->receivedDataLength;
  1993. peer->totalDataReceived += host->receivedDataLength;
  1994. }
  1995. currentData = host->receivedData + headerSize;
  1996. while (currentData < &host->receivedData[host->receivedDataLength]) {
  1997. uint8_t commandNumber;
  1998. size_t commandSize;
  1999. command = (ENetProtocol*)currentData;
  2000. if (currentData + sizeof(ENetProtocolCommandHeader) > & host->receivedData[host->receivedDataLength])
  2001. break;
  2002. commandNumber = command->header.command & ENET_PROTOCOL_COMMAND_MASK;
  2003. if (commandNumber >= ENET_PROTOCOL_COMMAND_COUNT)
  2004. break;
  2005. commandSize = commandSizes[commandNumber];
  2006. if (commandSize == 0 || currentData + commandSize > & host->receivedData[host->receivedDataLength])
  2007. break;
  2008. currentData += commandSize;
  2009. if (peer == NULL && (commandNumber != ENET_PROTOCOL_COMMAND_CONNECT || currentData < &host->receivedData[host->receivedDataLength]))
  2010. break;
  2011. command->header.reliableSequenceNumber = ENET_NET_TO_HOST_16(command->header.reliableSequenceNumber);
  2012. switch (commandNumber) {
  2013. case ENET_PROTOCOL_COMMAND_ACKNOWLEDGE:
  2014. if (enet_protocol_handle_acknowledge(host, event, peer, command))
  2015. goto commandError;
  2016. break;
  2017. case ENET_PROTOCOL_COMMAND_CONNECT:
  2018. if (peer != NULL)
  2019. goto commandError;
  2020. if (host->preventConnections == 0) {
  2021. peer = enet_protocol_handle_connect(host, header, command);
  2022. if (peer == NULL)
  2023. goto commandError;
  2024. }
  2025. break;
  2026. case ENET_PROTOCOL_COMMAND_VERIFY_CONNECT:
  2027. if (enet_protocol_handle_verify_connect(host, event, peer, command))
  2028. goto commandError;
  2029. break;
  2030. case ENET_PROTOCOL_COMMAND_DISCONNECT:
  2031. if (enet_protocol_handle_disconnect(host, peer, command))
  2032. goto commandError;
  2033. break;
  2034. case ENET_PROTOCOL_COMMAND_PING:
  2035. if (enet_protocol_handle_ping(host, peer, command))
  2036. goto commandError;
  2037. break;
  2038. case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
  2039. if (enet_protocol_handle_send_reliable(host, peer, command, &currentData))
  2040. goto commandError;
  2041. break;
  2042. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
  2043. if (enet_protocol_handle_send_unreliable(host, peer, command, &currentData))
  2044. goto commandError;
  2045. break;
  2046. case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
  2047. if (enet_protocol_handle_send_unsequenced(host, peer, command, &currentData))
  2048. goto commandError;
  2049. break;
  2050. case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
  2051. if (enet_protocol_handle_send_fragment(host, peer, command, &currentData))
  2052. goto commandError;
  2053. break;
  2054. case ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT:
  2055. if (enet_protocol_handle_bandwidth_limit(host, peer, command))
  2056. goto commandError;
  2057. break;
  2058. case ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE:
  2059. if (enet_protocol_handle_throttle_configure(host, peer, command))
  2060. goto commandError;
  2061. break;
  2062. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT:
  2063. if (enet_protocol_handle_send_unreliable_fragment(host, peer, command, &currentData))
  2064. goto commandError;
  2065. break;
  2066. default:
  2067. goto commandError;
  2068. }
  2069. if (peer != NULL && (command->header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) != 0) {
  2070. uint16_t sentTime;
  2071. if (!(flags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME))
  2072. break;
  2073. sentTime = ENET_NET_TO_HOST_16(header->sentTime);
  2074. switch (peer->state) {
  2075. case ENET_PEER_STATE_DISCONNECTING:
  2076. case ENET_PEER_STATE_ACKNOWLEDGING_CONNECT:
  2077. case ENET_PEER_STATE_DISCONNECTED:
  2078. case ENET_PEER_STATE_ZOMBIE:
  2079. break;
  2080. case ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT:
  2081. if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_DISCONNECT)
  2082. enet_peer_queue_acknowledgement(peer, command, sentTime);
  2083. break;
  2084. default:
  2085. enet_peer_queue_acknowledgement(peer, command, sentTime);
  2086. break;
  2087. }
  2088. }
  2089. }
  2090. commandError:
  2091. if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
  2092. return 1;
  2093. return 0;
  2094. }
  2095. static int enet_protocol_receive_incoming_commands(ENetHost* host, ENetEvent* event) {
  2096. int packets;
  2097. for (packets = 0; packets < 256; ++packets) {
  2098. int receivedLength;
  2099. ENetBuffer buffer;
  2100. buffer.data = host->packetData[0];
  2101. buffer.dataLength = host->mtu;
  2102. receivedLength = enet_socket_receive(host->socket, &host->receivedAddress, &buffer, 1);
  2103. if (receivedLength == -2)
  2104. continue;
  2105. if (receivedLength < 0) {
  2106. ENET_LOG_ERROR("Command received length was negative: %i", receivedLength);
  2107. return -1;
  2108. }
  2109. if (receivedLength == 0)
  2110. return 0;
  2111. host->receivedData = host->packetData[0];
  2112. host->receivedDataLength = receivedLength;
  2113. host->totalReceivedData += receivedLength;
  2114. host->totalReceivedPackets++;
  2115. if (host->interceptCallback != NULL) {
  2116. switch (host->interceptCallback(event, host->receivedData, host->receivedDataLength)) {
  2117. case 1:
  2118. if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
  2119. return 1;
  2120. continue;
  2121. case -1:
  2122. ENET_LOG_ERROR("Intercept callback failure.");
  2123. return -1;
  2124. default:
  2125. break;
  2126. }
  2127. }
  2128. switch (enet_protocol_handle_incoming_commands(host, event)) {
  2129. case 1:
  2130. return 1;
  2131. case -1:
  2132. ENET_LOG_ERROR("Failed handling incoming protocol commands.");
  2133. return -1;
  2134. default:
  2135. break;
  2136. }
  2137. }
  2138. return 0;
  2139. }
  2140. static void enet_protocol_send_acknowledgements(ENetHost* host, ENetPeer* peer) {
  2141. ENetProtocol* command = &host->commands[host->commandCount];
  2142. ENetBuffer* buffer = &host->buffers[host->bufferCount];
  2143. ENetAcknowledgement* acknowledgement;
  2144. ENetListIterator currentAcknowledgement;
  2145. uint16_t reliableSequenceNumber;
  2146. currentAcknowledgement = enet_list_begin(&peer->acknowledgements);
  2147. while (currentAcknowledgement != enet_list_end(&peer->acknowledgements)) {
  2148. if (command >= &host->commands[sizeof(host->commands) / sizeof(ENetProtocol)] || buffer >= &host->buffers[sizeof(host->buffers) / sizeof(ENetBuffer)] || peer->mtu - host->packetSize < sizeof(ENetProtocolAcknowledge)) {
  2149. host->continueSending = 1;
  2150. break;
  2151. }
  2152. acknowledgement = (ENetAcknowledgement*)currentAcknowledgement;
  2153. currentAcknowledgement = enet_list_next(currentAcknowledgement);
  2154. buffer->data = command;
  2155. buffer->dataLength = sizeof(ENetProtocolAcknowledge);
  2156. host->packetSize += buffer->dataLength;
  2157. reliableSequenceNumber = ENET_HOST_TO_NET_16(acknowledgement->command.header.reliableSequenceNumber);
  2158. command->header.command = ENET_PROTOCOL_COMMAND_ACKNOWLEDGE;
  2159. command->header.channelID = acknowledgement->command.header.channelID;
  2160. command->header.reliableSequenceNumber = reliableSequenceNumber;
  2161. command->acknowledge.receivedReliableSequenceNumber = reliableSequenceNumber;
  2162. command->acknowledge.receivedSentTime = ENET_HOST_TO_NET_16(acknowledgement->sentTime);
  2163. if ((acknowledgement->command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_DISCONNECT)
  2164. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  2165. enet_list_remove(&acknowledgement->acknowledgementList);
  2166. enet_free(acknowledgement);
  2167. ++command;
  2168. ++buffer;
  2169. }
  2170. host->commandCount = command - host->commands;
  2171. host->bufferCount = buffer - host->buffers;
  2172. }
  2173. static int enet_protocol_check_timeouts(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  2174. ENetOutgoingCommand* outgoingCommand;
  2175. ENetListIterator currentCommand, insertPosition;
  2176. currentCommand = enet_list_begin(&peer->sentReliableCommands);
  2177. insertPosition = enet_list_begin(&peer->outgoingCommands);
  2178. while (currentCommand != enet_list_end(&peer->sentReliableCommands)) {
  2179. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2180. currentCommand = enet_list_next(currentCommand);
  2181. if (ENET_TIME_DIFFERENCE(host->serviceTime, outgoingCommand->sentTime) < outgoingCommand->roundTripTimeout)
  2182. continue;
  2183. if (peer->earliestTimeout == 0 || ENET_TIME_LESS(outgoingCommand->sentTime, peer->earliestTimeout))
  2184. peer->earliestTimeout = outgoingCommand->sentTime;
  2185. if (peer->earliestTimeout != 0 && (ENET_TIME_DIFFERENCE(host->serviceTime, peer->earliestTimeout) >= peer->timeoutMaximum || (outgoingCommand->roundTripTimeout >= outgoingCommand->roundTripTimeoutLimit && ENET_TIME_DIFFERENCE(host->serviceTime, peer->earliestTimeout) >= peer->timeoutMinimum))) {
  2186. enet_protocol_notify_disconnect_timeout(host, peer, event);
  2187. return 1;
  2188. }
  2189. if (outgoingCommand->packet != NULL)
  2190. peer->reliableDataInTransit -= outgoingCommand->fragmentLength;
  2191. ++peer->totalPacketsLost;
  2192. outgoingCommand->roundTripTimeout = peer->roundTripTime + 4 * peer->roundTripTimeVariance;
  2193. outgoingCommand->roundTripTimeoutLimit = peer->timeoutLimit * outgoingCommand->roundTripTimeout;
  2194. enet_list_insert(insertPosition, enet_list_remove(&outgoingCommand->outgoingCommandList));
  2195. if (currentCommand == enet_list_begin(&peer->sentReliableCommands) && !enet_list_empty(&peer->sentReliableCommands)) {
  2196. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2197. peer->nextTimeout = outgoingCommand->sentTime + outgoingCommand->roundTripTimeout;
  2198. }
  2199. }
  2200. return 0;
  2201. }
  2202. static int enet_protocol_check_outgoing_commands(ENetHost* host, ENetPeer* peer) {
  2203. ENetProtocol* command = &host->commands[host->commandCount];
  2204. ENetBuffer* buffer = &host->buffers[host->bufferCount];
  2205. ENetOutgoingCommand* outgoingCommand;
  2206. ENetListIterator currentCommand;
  2207. ENetChannel* channel;
  2208. uint16_t reliableWindow;
  2209. size_t commandSize;
  2210. int windowExceeded = 0, windowWrap = 0, canPing = 1;
  2211. currentCommand = enet_list_begin(&peer->outgoingCommands);
  2212. while (currentCommand != enet_list_end(&peer->outgoingCommands)) {
  2213. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2214. if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
  2215. channel = outgoingCommand->command.header.channelID < peer->channelCount ? &peer->channels[outgoingCommand->command.header.channelID] : NULL;
  2216. reliableWindow = outgoingCommand->reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2217. if (channel != NULL) {
  2218. if (!windowWrap && outgoingCommand->sendAttempts < 1 && !(outgoingCommand->reliableSequenceNumber % ENET_PEER_RELIABLE_WINDOW_SIZE) && (channel->reliableWindows[(reliableWindow + ENET_PEER_RELIABLE_WINDOWS - 1) % ENET_PEER_RELIABLE_WINDOWS] >= ENET_PEER_RELIABLE_WINDOW_SIZE || channel->usedReliableWindows & ((((1 << ENET_PEER_FREE_RELIABLE_WINDOWS) - 1) << reliableWindow) | (((1 << ENET_PEER_FREE_RELIABLE_WINDOWS) - 1) >> (ENET_PEER_RELIABLE_WINDOWS - reliableWindow)))))
  2219. windowWrap = 1;
  2220. if (windowWrap) {
  2221. currentCommand = enet_list_next(currentCommand);
  2222. continue;
  2223. }
  2224. }
  2225. if (outgoingCommand->packet != NULL) {
  2226. if (!windowExceeded) {
  2227. uint32_t windowSize = (peer->packetThrottle * peer->windowSize) / ENET_PEER_PACKET_THROTTLE_SCALE;
  2228. if (peer->reliableDataInTransit + outgoingCommand->fragmentLength > ENET_MAX(windowSize, peer->mtu))
  2229. windowExceeded = 1;
  2230. }
  2231. if (windowExceeded) {
  2232. currentCommand = enet_list_next(currentCommand);
  2233. continue;
  2234. }
  2235. }
  2236. canPing = 0;
  2237. }
  2238. commandSize = commandSizes[outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK];
  2239. if (command >= &host->commands[sizeof(host->commands) / sizeof(ENetProtocol)] || buffer + 1 >= &host->buffers[sizeof(host->buffers) / sizeof(ENetBuffer)] || peer->mtu - host->packetSize < commandSize || (outgoingCommand->packet != NULL && (uint16_t)(peer->mtu - host->packetSize) < (uint16_t)(commandSize + outgoingCommand->fragmentLength))) {
  2240. host->continueSending = 1;
  2241. break;
  2242. }
  2243. currentCommand = enet_list_next(currentCommand);
  2244. if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
  2245. if (channel != NULL && outgoingCommand->sendAttempts < 1) {
  2246. channel->usedReliableWindows |= 1 << reliableWindow;
  2247. ++channel->reliableWindows[reliableWindow];
  2248. }
  2249. ++outgoingCommand->sendAttempts;
  2250. if (outgoingCommand->roundTripTimeout == 0) {
  2251. outgoingCommand->roundTripTimeout = peer->roundTripTime + 4 * peer->roundTripTimeVariance;
  2252. outgoingCommand->roundTripTimeoutLimit = peer->timeoutLimit * outgoingCommand->roundTripTimeout;
  2253. }
  2254. if (enet_list_empty(&peer->sentReliableCommands))
  2255. peer->nextTimeout = host->serviceTime + outgoingCommand->roundTripTimeout;
  2256. enet_list_insert(enet_list_end(&peer->sentReliableCommands),
  2257. enet_list_remove(&outgoingCommand->outgoingCommandList));
  2258. outgoingCommand->sentTime = host->serviceTime;
  2259. host->headerFlags |= ENET_PROTOCOL_HEADER_FLAG_SENT_TIME;
  2260. peer->reliableDataInTransit += outgoingCommand->fragmentLength;
  2261. }
  2262. else {
  2263. if (outgoingCommand->packet != NULL && outgoingCommand->fragmentOffset == 0 && !(outgoingCommand->packet->flags & (ENET_PACKET_FLAG_UNTHROTTLED))) {
  2264. peer->packetThrottleCounter += ENET_PEER_PACKET_THROTTLE_COUNTER;
  2265. peer->packetThrottleCounter %= ENET_PEER_PACKET_THROTTLE_SCALE;
  2266. if (peer->packetThrottleCounter > peer->packetThrottle) {
  2267. uint16_t reliableSequenceNumber = outgoingCommand->reliableSequenceNumber,
  2268. unreliableSequenceNumber = outgoingCommand->unreliableSequenceNumber;
  2269. for (;;) {
  2270. --outgoingCommand->packet->referenceCount;
  2271. if (outgoingCommand->packet->referenceCount == 0)
  2272. enet_packet_destroy(outgoingCommand->packet);
  2273. enet_list_remove(&outgoingCommand->outgoingCommandList);
  2274. enet_free(outgoingCommand);
  2275. if (currentCommand == enet_list_end(&peer->outgoingCommands))
  2276. break;
  2277. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2278. if (outgoingCommand->reliableSequenceNumber != reliableSequenceNumber || outgoingCommand->unreliableSequenceNumber != unreliableSequenceNumber)
  2279. break;
  2280. currentCommand = enet_list_next(currentCommand);
  2281. }
  2282. continue;
  2283. }
  2284. }
  2285. enet_list_remove(&outgoingCommand->outgoingCommandList);
  2286. if (outgoingCommand->packet != NULL)
  2287. enet_list_insert(enet_list_end(&peer->sentUnreliableCommands), outgoingCommand);
  2288. }
  2289. buffer->data = command;
  2290. buffer->dataLength = commandSize;
  2291. host->packetSize += buffer->dataLength;
  2292. *command = outgoingCommand->command;
  2293. if (outgoingCommand->packet != NULL) {
  2294. ++buffer;
  2295. buffer->data = outgoingCommand->packet->data + outgoingCommand->fragmentOffset;
  2296. buffer->dataLength = outgoingCommand->fragmentLength;
  2297. host->packetSize += outgoingCommand->fragmentLength;
  2298. }
  2299. else if (!(outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE)) {
  2300. enet_free(outgoingCommand);
  2301. }
  2302. ++peer->totalPacketsSent;
  2303. ++command;
  2304. ++buffer;
  2305. }
  2306. host->commandCount = command - host->commands;
  2307. host->bufferCount = buffer - host->buffers;
  2308. if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER && enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands) && enet_list_empty(&peer->sentUnreliableCommands))
  2309. enet_peer_disconnect(peer, peer->eventData);
  2310. return canPing;
  2311. }
  2312. static int enet_protocol_send_outgoing_commands(ENetHost* host, ENetEvent* event, int checkForTimeouts) {
  2313. uint8_t headerData[sizeof(ENetProtocolHeader) + sizeof(uint32_t)];
  2314. ENetProtocolHeader* header = (ENetProtocolHeader*)headerData;
  2315. ENetPeer* currentPeer;
  2316. int sentLength;
  2317. host->continueSending = 1;
  2318. while (host->continueSending) {
  2319. for (host->continueSending = 0, currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  2320. if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED || currentPeer->state == ENET_PEER_STATE_ZOMBIE)
  2321. continue;
  2322. host->headerFlags = 0;
  2323. host->commandCount = 0;
  2324. host->bufferCount = 1;
  2325. host->packetSize = sizeof(ENetProtocolHeader);
  2326. if (!enet_list_empty(&currentPeer->acknowledgements))
  2327. enet_protocol_send_acknowledgements(host, currentPeer);
  2328. if (checkForTimeouts != 0 && !enet_list_empty(&currentPeer->sentReliableCommands) && ENET_TIME_GREATER_EQUAL(host->serviceTime, currentPeer->nextTimeout) && enet_protocol_check_timeouts(host, currentPeer, event) == 1) {
  2329. if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
  2330. return 1;
  2331. else
  2332. continue;
  2333. }
  2334. if ((enet_list_empty(&currentPeer->outgoingCommands) || enet_protocol_check_outgoing_commands(host, currentPeer)) && enet_list_empty(&currentPeer->sentReliableCommands) && ENET_TIME_DIFFERENCE(host->serviceTime, currentPeer->lastReceiveTime) >= currentPeer->pingInterval && currentPeer->mtu - host->packetSize >= sizeof(ENetProtocolPing)) {
  2335. enet_peer_ping(currentPeer);
  2336. enet_protocol_check_outgoing_commands(host, currentPeer);
  2337. }
  2338. if (host->commandCount == 0)
  2339. continue;
  2340. host->buffers->data = headerData;
  2341. if (host->headerFlags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME) {
  2342. header->sentTime = ENET_HOST_TO_NET_16(host->serviceTime & 0xFFFF);
  2343. host->buffers->dataLength = sizeof(ENetProtocolHeader);
  2344. }
  2345. else {
  2346. host->buffers->dataLength = (size_t) & ((ENetProtocolHeader*)0)->sentTime;
  2347. }
  2348. if (currentPeer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID)
  2349. host->headerFlags |= currentPeer->outgoingSessionID << ENET_PROTOCOL_HEADER_SESSION_SHIFT;
  2350. header->peerID = ENET_HOST_TO_NET_16(currentPeer->outgoingPeerID | host->headerFlags);
  2351. if (host->checksumCallback != NULL) {
  2352. uint64_t* checksum = (uint64_t*)&headerData[host->buffers->dataLength];
  2353. *checksum = currentPeer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID ? currentPeer->connectID : 0;
  2354. host->buffers->dataLength += sizeof(uint64_t);
  2355. *checksum = host->checksumCallback(host->buffers, host->bufferCount);
  2356. }
  2357. currentPeer->lastSendTime = host->serviceTime;
  2358. sentLength = enet_socket_send(host->socket, &currentPeer->address, host->buffers, host->bufferCount);
  2359. enet_protocol_remove_sent_unreliable_commands(currentPeer);
  2360. if (sentLength < 0)
  2361. return -1;
  2362. host->totalSentData += sentLength;
  2363. currentPeer->totalDataSent += sentLength;
  2364. host->totalSentPackets++;
  2365. }
  2366. }
  2367. return 0;
  2368. }
  2369. void enet_host_flush(ENetHost* host) {
  2370. host->serviceTime = enet_time_get();
  2371. enet_protocol_send_outgoing_commands(host, NULL, 0);
  2372. }
  2373. int enet_host_check_events(ENetHost* host, ENetEvent* event) {
  2374. if (event == NULL)
  2375. return -1;
  2376. event->type = ENET_EVENT_TYPE_NONE;
  2377. event->peer = NULL;
  2378. event->packet = NULL;
  2379. return enet_protocol_dispatch_incoming_commands(host, event);
  2380. }
  2381. int enet_host_service(ENetHost* host, ENetEvent* event, uint32_t timeout) {
  2382. uint32_t waitCondition;
  2383. if (event != NULL) {
  2384. event->type = ENET_EVENT_TYPE_NONE;
  2385. event->peer = NULL;
  2386. event->packet = NULL;
  2387. switch (enet_protocol_dispatch_incoming_commands(host, event)) {
  2388. case 1:
  2389. return 1;
  2390. case -1:
  2391. ENET_LOG_ERROR("An error occurred while dispatching incoming packets.");
  2392. return -1;
  2393. default:
  2394. break;
  2395. }
  2396. }
  2397. host->serviceTime = enet_time_get();
  2398. timeout += host->serviceTime;
  2399. do {
  2400. if (ENET_TIME_DIFFERENCE(host->serviceTime, host->bandwidthThrottleEpoch) >= ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL)
  2401. enet_host_bandwidth_throttle(host);
  2402. switch (enet_protocol_send_outgoing_commands(host, event, 1)) {
  2403. case 1:
  2404. return 1;
  2405. case -1:
  2406. ENET_LOG_ERROR("An error occurred while sending outgoing packet commands.");
  2407. return -1;
  2408. default:
  2409. break;
  2410. }
  2411. switch (enet_protocol_receive_incoming_commands(host, event)) {
  2412. case 1:
  2413. return 1;
  2414. case -1:
  2415. ENET_LOG_ERROR("An error occurred while dispatching incoming packet commands.");
  2416. return -1;
  2417. default:
  2418. break;
  2419. }
  2420. switch (enet_protocol_send_outgoing_commands(host, event, 1)) {
  2421. case 1:
  2422. return 1;
  2423. case -1:
  2424. ENET_LOG_ERROR("An error occurred while dispatching outgoing packet commands.");
  2425. return -1;
  2426. default:
  2427. break;
  2428. }
  2429. if (event != NULL) {
  2430. switch (enet_protocol_dispatch_incoming_commands(host, event)) {
  2431. case 1:
  2432. return 1;
  2433. case -1:
  2434. ENET_LOG_ERROR("An error occurred while dispatching incoming packet commands.");
  2435. return -1;
  2436. default:
  2437. break;
  2438. }
  2439. }
  2440. if (ENET_TIME_GREATER_EQUAL(host->serviceTime, timeout))
  2441. return 0;
  2442. do {
  2443. host->serviceTime = enet_time_get();
  2444. if (ENET_TIME_GREATER_EQUAL(host->serviceTime, timeout))
  2445. return 0;
  2446. waitCondition = ENET_SOCKET_WAIT_RECEIVE | ENET_SOCKET_WAIT_INTERRUPT;
  2447. if (enet_socket_wait(host->socket, &waitCondition, ENET_TIME_DIFFERENCE(timeout, host->serviceTime)) != 0)
  2448. return -1;
  2449. }
  2450. while (waitCondition & ENET_SOCKET_WAIT_INTERRUPT);
  2451. host->serviceTime = enet_time_get();
  2452. }
  2453. while (waitCondition & ENET_SOCKET_WAIT_RECEIVE);
  2454. return 0;
  2455. }
  2456. /*
  2457. =======================================================================
  2458. Peer
  2459. =======================================================================
  2460. */
  2461. void enet_peer_throttle_configure(ENetPeer* peer, uint32_t interval, uint32_t acceleration, uint32_t deceleration, uint32_t threshold) {
  2462. ENetProtocol command;
  2463. peer->packetThrottleThreshold = threshold;
  2464. peer->packetThrottleInterval = interval;
  2465. peer->packetThrottleAcceleration = acceleration;
  2466. peer->packetThrottleDeceleration = deceleration;
  2467. command.header.command = ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2468. command.header.channelID = 0xFF;
  2469. command.throttleConfigure.packetThrottleInterval = ENET_HOST_TO_NET_32(interval);
  2470. command.throttleConfigure.packetThrottleAcceleration = ENET_HOST_TO_NET_32(acceleration);
  2471. command.throttleConfigure.packetThrottleDeceleration = ENET_HOST_TO_NET_32(deceleration);
  2472. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2473. }
  2474. int enet_peer_throttle(ENetPeer* peer, uint32_t rtt) {
  2475. if (peer->lastRoundTripTime <= peer->lastRoundTripTimeVariance) {
  2476. peer->packetThrottle = peer->packetThrottleLimit;
  2477. }
  2478. else if (rtt < peer->lastRoundTripTime + (peer->lastRoundTripTimeVariance + 1) / 2) {
  2479. peer->packetThrottle += peer->packetThrottleAcceleration;
  2480. if (peer->packetThrottle > peer->packetThrottleLimit)
  2481. peer->packetThrottle = peer->packetThrottleLimit;
  2482. return 1;
  2483. }
  2484. else if (rtt > peer->lastRoundTripTime + peer->packetThrottleThreshold + 2 * peer->lastRoundTripTimeVariance) {
  2485. if (peer->packetThrottle > peer->packetThrottleDeceleration)
  2486. peer->packetThrottle -= peer->packetThrottleDeceleration;
  2487. else
  2488. peer->packetThrottle = 0;
  2489. return -1;
  2490. }
  2491. return 0;
  2492. }
  2493. int enet_peer_send(ENetPeer* peer, uint8_t channelID, ENetPacket* packet) {
  2494. ENetChannel* channel = &peer->channels[channelID];
  2495. ENetProtocol command;
  2496. size_t fragmentLength;
  2497. if (peer->state != ENET_PEER_STATE_CONNECTED || channelID >= peer->channelCount || packet->dataLength > peer->host->maximumPacketSize) {
  2498. ENET_LOG_ERROR("Failed sending data. Peer is not connected, the channel is above the maximum channels supported or the payload length is too large.");
  2499. return -1;
  2500. }
  2501. fragmentLength = peer->mtu - sizeof(ENetProtocolHeader) - sizeof(ENetProtocolSendFragment);
  2502. if (peer->host->checksumCallback != NULL)
  2503. fragmentLength -= sizeof(uint64_t);
  2504. if (packet->dataLength > fragmentLength) {
  2505. uint32_t fragmentCount = (packet->dataLength + fragmentLength - 1) / fragmentLength, fragmentNumber, fragmentOffset;
  2506. uint8_t commandNumber;
  2507. uint16_t startSequenceNumber;
  2508. ENetList fragments;
  2509. ENetOutgoingCommand* fragment;
  2510. if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT) {
  2511. ENET_LOG_ERROR("Failed sending data. Too many fragments (%u vs %u).", fragmentCount, ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT);
  2512. return -1;
  2513. }
  2514. if ((packet->flags & (ENET_PACKET_FLAG_RELIABLE | ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED)) == ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED && channel->outgoingUnreliableSequenceNumber < 0xFFFF) {
  2515. commandNumber = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT;
  2516. startSequenceNumber = ENET_HOST_TO_NET_16(channel->outgoingUnreliableSequenceNumber + 1);
  2517. }
  2518. else {
  2519. commandNumber = ENET_PROTOCOL_COMMAND_SEND_FRAGMENT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2520. startSequenceNumber = ENET_HOST_TO_NET_16(channel->outgoingReliableSequenceNumber + 1);
  2521. }
  2522. enet_list_clear(&fragments);
  2523. for (fragmentNumber = 0, fragmentOffset = 0; fragmentOffset < packet->dataLength; ++fragmentNumber, fragmentOffset += fragmentLength) {
  2524. if (packet->dataLength - fragmentOffset < fragmentLength)
  2525. fragmentLength = packet->dataLength - fragmentOffset;
  2526. fragment = (ENetOutgoingCommand*)enet_malloc(sizeof(ENetOutgoingCommand));
  2527. if (fragment == NULL) {
  2528. while (!enet_list_empty(&fragments)) {
  2529. fragment = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(&fragments));
  2530. enet_free(fragment);
  2531. }
  2532. ENET_LOG_ERROR("Failed sending data. A fragment was null.");
  2533. return -1;
  2534. }
  2535. fragment->fragmentOffset = fragmentOffset;
  2536. fragment->fragmentLength = fragmentLength;
  2537. fragment->packet = packet;
  2538. fragment->command.header.command = commandNumber;
  2539. fragment->command.header.channelID = channelID;
  2540. fragment->command.sendFragment.startSequenceNumber = startSequenceNumber;
  2541. fragment->command.sendFragment.dataLength = ENET_HOST_TO_NET_16(fragmentLength);
  2542. fragment->command.sendFragment.fragmentCount = ENET_HOST_TO_NET_32(fragmentCount);
  2543. fragment->command.sendFragment.fragmentNumber = ENET_HOST_TO_NET_32(fragmentNumber);
  2544. fragment->command.sendFragment.totalLength = ENET_HOST_TO_NET_32(packet->dataLength);
  2545. fragment->command.sendFragment.fragmentOffset = ENET_NET_TO_HOST_32(fragmentOffset);
  2546. enet_list_insert(enet_list_end(&fragments), fragment);
  2547. }
  2548. packet->referenceCount += fragmentNumber;
  2549. while (!enet_list_empty(&fragments)) {
  2550. fragment = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(&fragments));
  2551. enet_peer_setup_outgoing_command(peer, fragment);
  2552. }
  2553. return 0;
  2554. }
  2555. command.header.channelID = channelID;
  2556. if ((packet->flags & (ENET_PACKET_FLAG_RELIABLE | ENET_PACKET_FLAG_UNSEQUENCED)) == ENET_PACKET_FLAG_UNSEQUENCED) {
  2557. command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
  2558. command.sendUnsequenced.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
  2559. }
  2560. else if (packet->flags & ENET_PACKET_FLAG_RELIABLE || channel->outgoingUnreliableSequenceNumber >= 0xFFFF) {
  2561. command.header.command = ENET_PROTOCOL_COMMAND_SEND_RELIABLE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2562. command.sendReliable.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
  2563. }
  2564. else {
  2565. command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE;
  2566. command.sendUnreliable.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
  2567. }
  2568. if (enet_peer_queue_outgoing_command(peer, &command, packet, 0, packet->dataLength) == NULL) {
  2569. ENET_LOG_ERROR("Unable to queue a NULL outgoing command.");
  2570. return -1;
  2571. }
  2572. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  2573. enet_host_flush(peer->host);
  2574. return 0;
  2575. }
  2576. ENetPacket* enet_peer_receive(ENetPeer* peer, uint8_t* channelID) {
  2577. ENetIncomingCommand* incomingCommand;
  2578. ENetPacket* packet;
  2579. if (enet_list_empty(&peer->dispatchedCommands))
  2580. return NULL;
  2581. incomingCommand = (ENetIncomingCommand*)enet_list_remove(enet_list_begin(&peer->dispatchedCommands));
  2582. if (channelID != NULL)
  2583. *channelID = incomingCommand->command.header.channelID;
  2584. packet = incomingCommand->packet;
  2585. --packet->referenceCount;
  2586. if (incomingCommand->fragments != NULL)
  2587. enet_free(incomingCommand->fragments);
  2588. enet_free(incomingCommand);
  2589. peer->totalWaitingData -= packet->dataLength;
  2590. return packet;
  2591. }
  2592. static void enet_peer_reset_outgoing_commands(ENetList* queue) {
  2593. ENetOutgoingCommand* outgoingCommand;
  2594. while (!enet_list_empty(queue)) {
  2595. outgoingCommand = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(queue));
  2596. if (outgoingCommand->packet != NULL) {
  2597. --outgoingCommand->packet->referenceCount;
  2598. if (outgoingCommand->packet->referenceCount == 0)
  2599. enet_packet_destroy(outgoingCommand->packet);
  2600. }
  2601. enet_free(outgoingCommand);
  2602. }
  2603. }
  2604. static void enet_peer_remove_incoming_commands(ENetList* queue, ENetListIterator startCommand, ENetListIterator endCommand, ENetIncomingCommand* excludeCommand) {
  2605. ENetListIterator currentCommand;
  2606. for (currentCommand = startCommand; currentCommand != endCommand;) {
  2607. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  2608. currentCommand = enet_list_next(currentCommand);
  2609. if (incomingCommand == excludeCommand)
  2610. continue;
  2611. enet_list_remove(&incomingCommand->incomingCommandList);
  2612. if (incomingCommand->packet != NULL) {
  2613. --incomingCommand->packet->referenceCount;
  2614. if (incomingCommand->packet->referenceCount == 0)
  2615. enet_packet_destroy(incomingCommand->packet);
  2616. }
  2617. if (incomingCommand->fragments != NULL)
  2618. enet_free(incomingCommand->fragments);
  2619. enet_free(incomingCommand);
  2620. }
  2621. }
  2622. static void enet_peer_reset_incoming_commands(ENetList* queue) {
  2623. enet_peer_remove_incoming_commands(queue, enet_list_begin(queue), enet_list_end(queue), NULL);
  2624. }
  2625. void enet_peer_reset_queues(ENetPeer* peer) {
  2626. ENetChannel* channel;
  2627. if (peer->needsDispatch) {
  2628. enet_list_remove(&peer->dispatchList);
  2629. peer->needsDispatch = 0;
  2630. }
  2631. while (!enet_list_empty(&peer->acknowledgements)) {
  2632. enet_free(enet_list_remove(enet_list_begin(&peer->acknowledgements)));
  2633. }
  2634. enet_peer_reset_outgoing_commands(&peer->sentReliableCommands);
  2635. enet_peer_reset_outgoing_commands(&peer->sentUnreliableCommands);
  2636. enet_peer_reset_outgoing_commands(&peer->outgoingCommands);
  2637. enet_peer_reset_incoming_commands(&peer->dispatchedCommands);
  2638. if (peer->channels != NULL && peer->channelCount > 0) {
  2639. for (channel = peer->channels; channel < &peer->channels[peer->channelCount]; ++channel) {
  2640. enet_peer_reset_incoming_commands(&channel->incomingReliableCommands);
  2641. enet_peer_reset_incoming_commands(&channel->incomingUnreliableCommands);
  2642. }
  2643. enet_free(peer->channels);
  2644. }
  2645. peer->channels = NULL;
  2646. peer->channelCount = 0;
  2647. }
  2648. void enet_peer_on_connect(ENetPeer* peer) {
  2649. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  2650. if (peer->incomingBandwidth != 0)
  2651. ++peer->host->bandwidthLimitedPeers;
  2652. ++peer->host->connectedPeers;
  2653. }
  2654. }
  2655. void enet_peer_on_disconnect(ENetPeer* peer) {
  2656. if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) {
  2657. if (peer->incomingBandwidth != 0)
  2658. --peer->host->bandwidthLimitedPeers;
  2659. --peer->host->connectedPeers;
  2660. }
  2661. }
  2662. void enet_peer_reset(ENetPeer* peer) {
  2663. enet_peer_on_disconnect(peer);
  2664. peer->outgoingPeerID = ENET_PROTOCOL_MAXIMUM_PEER_ID;
  2665. peer->state = ENET_PEER_STATE_DISCONNECTED;
  2666. peer->incomingBandwidth = 0;
  2667. peer->outgoingBandwidth = 0;
  2668. peer->incomingBandwidthThrottleEpoch = 0;
  2669. peer->outgoingBandwidthThrottleEpoch = 0;
  2670. peer->incomingDataTotal = 0;
  2671. peer->totalDataReceived = 0;
  2672. peer->outgoingDataTotal = 0;
  2673. peer->totalDataSent = 0;
  2674. peer->lastSendTime = 0;
  2675. peer->lastReceiveTime = 0;
  2676. peer->nextTimeout = 0;
  2677. peer->earliestTimeout = 0;
  2678. peer->totalPacketsSent = 0;
  2679. peer->totalPacketsLost = 0;
  2680. peer->packetThrottle = ENET_PEER_DEFAULT_PACKET_THROTTLE;
  2681. peer->packetThrottleThreshold = ENET_PEER_PACKET_THROTTLE_THRESHOLD;
  2682. peer->packetThrottleLimit = ENET_PEER_PACKET_THROTTLE_SCALE;
  2683. peer->packetThrottleCounter = 0;
  2684. peer->packetThrottleEpoch = 0;
  2685. peer->packetThrottleAcceleration = ENET_PEER_PACKET_THROTTLE_ACCELERATION;
  2686. peer->packetThrottleDeceleration = ENET_PEER_PACKET_THROTTLE_DECELERATION;
  2687. peer->packetThrottleInterval = ENET_PEER_PACKET_THROTTLE_INTERVAL;
  2688. peer->pingInterval = ENET_PEER_PING_INTERVAL;
  2689. peer->timeoutLimit = ENET_PEER_TIMEOUT_LIMIT;
  2690. peer->timeoutMinimum = ENET_PEER_TIMEOUT_MINIMUM;
  2691. peer->timeoutMaximum = ENET_PEER_TIMEOUT_MAXIMUM;
  2692. peer->lastRoundTripTime = ENET_PEER_DEFAULT_ROUND_TRIP_TIME;
  2693. peer->lowestRoundTripTime = ENET_PEER_DEFAULT_ROUND_TRIP_TIME;
  2694. peer->lastRoundTripTimeVariance = 0;
  2695. peer->highestRoundTripTimeVariance = 0;
  2696. peer->roundTripTime = 1;
  2697. peer->roundTripTimeVariance = 0;
  2698. peer->mtu = peer->host->mtu;
  2699. peer->reliableDataInTransit = 0;
  2700. peer->outgoingReliableSequenceNumber = 0;
  2701. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  2702. peer->incomingUnsequencedGroup = 0;
  2703. peer->outgoingUnsequencedGroup = 0;
  2704. peer->eventData = 0;
  2705. peer->totalWaitingData = 0;
  2706. memset(peer->unsequencedWindow, 0, sizeof(peer->unsequencedWindow));
  2707. enet_peer_reset_queues(peer);
  2708. }
  2709. void enet_peer_ping(ENetPeer* peer) {
  2710. ENetProtocol command;
  2711. if (peer->state != ENET_PEER_STATE_CONNECTED)
  2712. return;
  2713. command.header.command = ENET_PROTOCOL_COMMAND_PING | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2714. command.header.channelID = 0xFF;
  2715. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2716. }
  2717. void enet_peer_ping_interval(ENetPeer* peer, uint32_t pingInterval) {
  2718. peer->pingInterval = pingInterval ? pingInterval : ENET_PEER_PING_INTERVAL;
  2719. }
  2720. void enet_peer_timeout(ENetPeer* peer, uint32_t timeoutLimit, uint32_t timeoutMinimum, uint32_t timeoutMaximum) {
  2721. peer->timeoutLimit = timeoutLimit ? timeoutLimit : ENET_PEER_TIMEOUT_LIMIT;
  2722. peer->timeoutMinimum = timeoutMinimum ? timeoutMinimum : ENET_PEER_TIMEOUT_MINIMUM;
  2723. peer->timeoutMaximum = timeoutMaximum ? timeoutMaximum : ENET_PEER_TIMEOUT_MAXIMUM;
  2724. }
  2725. void enet_peer_disconnect_now(ENetPeer* peer, uint32_t data) {
  2726. ENetProtocol command;
  2727. if (peer->state == ENET_PEER_STATE_DISCONNECTED)
  2728. return;
  2729. if (peer->state != ENET_PEER_STATE_ZOMBIE && peer->state != ENET_PEER_STATE_DISCONNECTING) {
  2730. enet_peer_reset_queues(peer);
  2731. command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
  2732. command.header.channelID = 0xFF;
  2733. command.disconnect.data = ENET_HOST_TO_NET_32(data);
  2734. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2735. enet_host_flush(peer->host);
  2736. }
  2737. enet_peer_reset(peer);
  2738. }
  2739. void enet_peer_disconnect(ENetPeer* peer, uint32_t data) {
  2740. ENetProtocol command;
  2741. if (peer->state == ENET_PEER_STATE_DISCONNECTING || peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT || peer->state == ENET_PEER_STATE_ZOMBIE)
  2742. return;
  2743. enet_peer_reset_queues(peer);
  2744. command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT;
  2745. command.header.channelID = 0xFF;
  2746. command.disconnect.data = ENET_HOST_TO_NET_32(data);
  2747. if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER)
  2748. command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2749. else
  2750. command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
  2751. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2752. if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) {
  2753. enet_peer_on_disconnect(peer);
  2754. peer->state = ENET_PEER_STATE_DISCONNECTING;
  2755. }
  2756. else {
  2757. enet_host_flush(peer->host);
  2758. enet_peer_reset(peer);
  2759. }
  2760. }
  2761. void enet_peer_disconnect_later(ENetPeer* peer, uint32_t data) {
  2762. if ((peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) && !(enet_list_empty(&peer->outgoingCommands) && enet_list_empty(&peer->sentReliableCommands))) {
  2763. peer->state = ENET_PEER_STATE_DISCONNECT_LATER;
  2764. peer->eventData = data;
  2765. }
  2766. else {
  2767. enet_peer_disconnect(peer, data);
  2768. }
  2769. }
  2770. ENetAcknowledgement* enet_peer_queue_acknowledgement(ENetPeer* peer, const ENetProtocol* command, uint16_t sentTime) {
  2771. ENetAcknowledgement* acknowledgement;
  2772. if (command->header.channelID < peer->channelCount) {
  2773. ENetChannel* channel = &peer->channels[command->header.channelID];
  2774. uint16_t reliableWindow = command->header.reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2775. uint16_t currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2776. if (command->header.reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2777. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  2778. if (reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1 && reliableWindow <= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS)
  2779. return NULL;
  2780. }
  2781. acknowledgement = (ENetAcknowledgement*)enet_malloc(sizeof(ENetAcknowledgement));
  2782. if (acknowledgement == NULL)
  2783. return NULL;
  2784. peer->outgoingDataTotal += sizeof(ENetProtocolAcknowledge);
  2785. acknowledgement->sentTime = sentTime;
  2786. acknowledgement->command = *command;
  2787. enet_list_insert(enet_list_end(&peer->acknowledgements), acknowledgement);
  2788. return acknowledgement;
  2789. }
  2790. void enet_peer_setup_outgoing_command(ENetPeer* peer, ENetOutgoingCommand* outgoingCommand) {
  2791. ENetChannel* channel = &peer->channels[outgoingCommand->command.header.channelID];
  2792. peer->outgoingDataTotal += enet_protocol_command_size(outgoingCommand->command.header.command) + outgoingCommand->fragmentLength;
  2793. if (outgoingCommand->command.header.channelID == 0xFF) {
  2794. ++peer->outgoingReliableSequenceNumber;
  2795. outgoingCommand->reliableSequenceNumber = peer->outgoingReliableSequenceNumber;
  2796. outgoingCommand->unreliableSequenceNumber = 0;
  2797. }
  2798. else if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
  2799. ++channel->outgoingReliableSequenceNumber;
  2800. channel->outgoingUnreliableSequenceNumber = 0;
  2801. outgoingCommand->reliableSequenceNumber = channel->outgoingReliableSequenceNumber;
  2802. outgoingCommand->unreliableSequenceNumber = 0;
  2803. }
  2804. else if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED) {
  2805. ++peer->outgoingUnsequencedGroup;
  2806. outgoingCommand->reliableSequenceNumber = 0;
  2807. outgoingCommand->unreliableSequenceNumber = 0;
  2808. }
  2809. else {
  2810. if (outgoingCommand->fragmentOffset == 0)
  2811. ++channel->outgoingUnreliableSequenceNumber;
  2812. outgoingCommand->reliableSequenceNumber = channel->outgoingReliableSequenceNumber;
  2813. outgoingCommand->unreliableSequenceNumber = channel->outgoingUnreliableSequenceNumber;
  2814. }
  2815. outgoingCommand->sendAttempts = 0;
  2816. outgoingCommand->sentTime = 0;
  2817. outgoingCommand->roundTripTimeout = 0;
  2818. outgoingCommand->roundTripTimeoutLimit = 0;
  2819. outgoingCommand->command.header.reliableSequenceNumber = ENET_HOST_TO_NET_16(outgoingCommand->reliableSequenceNumber);
  2820. switch (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) {
  2821. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
  2822. outgoingCommand->command.sendUnreliable.unreliableSequenceNumber = ENET_HOST_TO_NET_16(outgoingCommand->unreliableSequenceNumber);
  2823. break;
  2824. case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
  2825. outgoingCommand->command.sendUnsequenced.unsequencedGroup = ENET_HOST_TO_NET_16(peer->outgoingUnsequencedGroup);
  2826. break;
  2827. default:
  2828. break;
  2829. }
  2830. enet_list_insert(enet_list_end(&peer->outgoingCommands), outgoingCommand);
  2831. }
  2832. ENetOutgoingCommand* enet_peer_queue_outgoing_command(ENetPeer* peer, const ENetProtocol* command, ENetPacket* packet, uint32_t offset, uint16_t length) {
  2833. ENetOutgoingCommand* outgoingCommand = (ENetOutgoingCommand*)enet_malloc(sizeof(ENetOutgoingCommand));
  2834. if (outgoingCommand == NULL)
  2835. return NULL;
  2836. outgoingCommand->command = *command;
  2837. outgoingCommand->fragmentOffset = offset;
  2838. outgoingCommand->fragmentLength = length;
  2839. outgoingCommand->packet = packet;
  2840. if (packet != NULL)
  2841. ++packet->referenceCount;
  2842. enet_peer_setup_outgoing_command(peer, outgoingCommand);
  2843. return outgoingCommand;
  2844. }
  2845. void enet_peer_dispatch_incoming_unreliable_commands(ENetPeer* peer, ENetChannel* channel, ENetIncomingCommand* queuedCommand) {
  2846. ENetListIterator droppedCommand, startCommand, currentCommand;
  2847. for (droppedCommand = startCommand = currentCommand = enet_list_begin(&channel->incomingUnreliableCommands); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_next(currentCommand)) {
  2848. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  2849. if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
  2850. continue;
  2851. if (incomingCommand->reliableSequenceNumber == channel->incomingReliableSequenceNumber) {
  2852. if (incomingCommand->fragmentsRemaining <= 0) {
  2853. channel->incomingUnreliableSequenceNumber = incomingCommand->unreliableSequenceNumber;
  2854. continue;
  2855. }
  2856. if (startCommand != currentCommand) {
  2857. enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
  2858. if (!peer->needsDispatch) {
  2859. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2860. peer->needsDispatch = 1;
  2861. }
  2862. droppedCommand = currentCommand;
  2863. }
  2864. else if (droppedCommand != currentCommand) {
  2865. droppedCommand = enet_list_previous(currentCommand);
  2866. }
  2867. }
  2868. else {
  2869. uint16_t reliableWindow = incomingCommand->reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2870. uint16_t currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2871. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2872. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  2873. if (reliableWindow >= currentWindow && reliableWindow < currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  2874. break;
  2875. droppedCommand = enet_list_next(currentCommand);
  2876. if (startCommand != currentCommand) {
  2877. enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
  2878. if (!peer->needsDispatch) {
  2879. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2880. peer->needsDispatch = 1;
  2881. }
  2882. }
  2883. }
  2884. startCommand = enet_list_next(currentCommand);
  2885. }
  2886. if (startCommand != currentCommand) {
  2887. enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
  2888. if (!peer->needsDispatch) {
  2889. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2890. peer->needsDispatch = 1;
  2891. }
  2892. droppedCommand = currentCommand;
  2893. }
  2894. enet_peer_remove_incoming_commands(&channel->incomingUnreliableCommands, enet_list_begin(&channel->incomingUnreliableCommands), droppedCommand, queuedCommand);
  2895. }
  2896. void enet_peer_dispatch_incoming_reliable_commands(ENetPeer* peer, ENetChannel* channel, ENetIncomingCommand* queuedCommand) {
  2897. ENetListIterator currentCommand;
  2898. for (currentCommand = enet_list_begin(&channel->incomingReliableCommands); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_next(currentCommand)) {
  2899. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  2900. if (incomingCommand->fragmentsRemaining > 0 || incomingCommand->reliableSequenceNumber != (uint16_t)(channel->incomingReliableSequenceNumber + 1))
  2901. break;
  2902. channel->incomingReliableSequenceNumber = incomingCommand->reliableSequenceNumber;
  2903. if (incomingCommand->fragmentCount > 0)
  2904. channel->incomingReliableSequenceNumber += incomingCommand->fragmentCount - 1;
  2905. }
  2906. if (currentCommand == enet_list_begin(&channel->incomingReliableCommands))
  2907. return;
  2908. channel->incomingUnreliableSequenceNumber = 0;
  2909. enet_list_move(enet_list_end(&peer->dispatchedCommands), enet_list_begin(&channel->incomingReliableCommands), enet_list_previous(currentCommand));
  2910. if (!peer->needsDispatch) {
  2911. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2912. peer->needsDispatch = 1;
  2913. }
  2914. if (!enet_list_empty(&channel->incomingUnreliableCommands))
  2915. enet_peer_dispatch_incoming_unreliable_commands(peer, channel, queuedCommand);
  2916. }
  2917. ENetIncomingCommand* enet_peer_queue_incoming_command(ENetPeer* peer, const ENetProtocol* command, const void* data, size_t dataLength, uint32_t flags, uint32_t fragmentCount) {
  2918. static ENetIncomingCommand dummyCommand;
  2919. ENetChannel* channel = &peer->channels[command->header.channelID];
  2920. uint32_t unreliableSequenceNumber = 0, reliableSequenceNumber = 0;
  2921. uint16_t reliableWindow, currentWindow;
  2922. ENetIncomingCommand* incomingCommand;
  2923. ENetListIterator currentCommand;
  2924. ENetPacket* packet = NULL;
  2925. if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER)
  2926. goto discardCommand;
  2927. if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED) {
  2928. reliableSequenceNumber = command->header.reliableSequenceNumber;
  2929. reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2930. currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2931. if (reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2932. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  2933. if (reliableWindow < currentWindow || reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  2934. goto discardCommand;
  2935. }
  2936. switch (command->header.command & ENET_PROTOCOL_COMMAND_MASK) {
  2937. case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
  2938. case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
  2939. if (reliableSequenceNumber == channel->incomingReliableSequenceNumber)
  2940. goto discardCommand;
  2941. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingReliableCommands)); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  2942. incomingCommand = (ENetIncomingCommand*)currentCommand;
  2943. if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  2944. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2945. continue;
  2946. }
  2947. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  2948. break;
  2949. }
  2950. if (incomingCommand->reliableSequenceNumber <= reliableSequenceNumber) {
  2951. if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
  2952. break;
  2953. goto discardCommand;
  2954. }
  2955. }
  2956. break;
  2957. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
  2958. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT:
  2959. unreliableSequenceNumber = ENET_NET_TO_HOST_16(command->sendUnreliable.unreliableSequenceNumber);
  2960. if (reliableSequenceNumber == channel->incomingReliableSequenceNumber && unreliableSequenceNumber <= channel->incomingUnreliableSequenceNumber)
  2961. goto discardCommand;
  2962. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingUnreliableCommands)); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  2963. incomingCommand = (ENetIncomingCommand*)currentCommand;
  2964. if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
  2965. continue;
  2966. if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  2967. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2968. continue;
  2969. }
  2970. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  2971. break;
  2972. }
  2973. if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
  2974. break;
  2975. if (incomingCommand->reliableSequenceNumber > reliableSequenceNumber)
  2976. continue;
  2977. if (incomingCommand->unreliableSequenceNumber <= unreliableSequenceNumber) {
  2978. if (incomingCommand->unreliableSequenceNumber < unreliableSequenceNumber)
  2979. break;
  2980. goto discardCommand;
  2981. }
  2982. }
  2983. break;
  2984. case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
  2985. currentCommand = enet_list_end(&channel->incomingUnreliableCommands);
  2986. break;
  2987. default:
  2988. goto discardCommand;
  2989. }
  2990. if (peer->totalWaitingData >= peer->host->maximumWaitingData)
  2991. goto notifyError;
  2992. packet = enet_packet_create(data, dataLength, flags);
  2993. if (packet == NULL)
  2994. goto notifyError;
  2995. incomingCommand = (ENetIncomingCommand*)enet_malloc(sizeof(ENetIncomingCommand));
  2996. if (incomingCommand == NULL)
  2997. goto notifyError;
  2998. incomingCommand->reliableSequenceNumber = command->header.reliableSequenceNumber;
  2999. incomingCommand->unreliableSequenceNumber = unreliableSequenceNumber & 0xFFFF;
  3000. incomingCommand->command = *command;
  3001. incomingCommand->fragmentCount = fragmentCount;
  3002. incomingCommand->fragmentsRemaining = fragmentCount;
  3003. incomingCommand->packet = packet;
  3004. incomingCommand->fragments = NULL;
  3005. if (fragmentCount > 0) {
  3006. if (fragmentCount <= ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT)
  3007. incomingCommand->fragments = (uint32_t*)enet_malloc((fragmentCount + 31) / 32 * sizeof(uint32_t));
  3008. if (incomingCommand->fragments == NULL) {
  3009. enet_free(incomingCommand);
  3010. goto notifyError;
  3011. }
  3012. memset(incomingCommand->fragments, 0, (fragmentCount + 31) / 32 * sizeof(uint32_t));
  3013. }
  3014. if (packet != NULL) {
  3015. ++packet->referenceCount;
  3016. peer->totalWaitingData += packet->dataLength;
  3017. }
  3018. enet_list_insert(enet_list_next(currentCommand), incomingCommand);
  3019. switch (command->header.command & ENET_PROTOCOL_COMMAND_MASK) {
  3020. case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
  3021. case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
  3022. enet_peer_dispatch_incoming_reliable_commands(peer, channel, incomingCommand);
  3023. break;
  3024. default:
  3025. enet_peer_dispatch_incoming_unreliable_commands(peer, channel, incomingCommand);
  3026. break;
  3027. }
  3028. return incomingCommand;
  3029. discardCommand:
  3030. if (fragmentCount > 0)
  3031. goto notifyError;
  3032. if (packet != NULL && packet->referenceCount == 0)
  3033. enet_packet_destroy(packet);
  3034. return &dummyCommand;
  3035. notifyError:
  3036. if (packet != NULL && packet->referenceCount == 0)
  3037. enet_packet_destroy(packet);
  3038. return NULL;
  3039. }
  3040. /*
  3041. =======================================================================
  3042. Host
  3043. =======================================================================
  3044. */
  3045. ENetHost* enet_host_create(const ENetAddress* address, size_t peerCount, size_t channelLimit, uint32_t incomingBandwidth, uint32_t outgoingBandwidth, int bufferSize) {
  3046. ENetHost* host;
  3047. ENetPeer* currentPeer;
  3048. ENET_LOG_TRACE("Creating ENet host object.");
  3049. if (peerCount > ENET_PROTOCOL_MAXIMUM_PEER_ID) {
  3050. ENET_LOG_ERROR("Creation failure: Peer count greater than maximum allowed (%u)", ENET_PROTOCOL_MAXIMUM_PEER_ID);
  3051. return NULL;
  3052. }
  3053. host = (ENetHost*)enet_malloc(sizeof(ENetHost));
  3054. if (host == NULL) {
  3055. ENET_LOG_ERROR("Creation failure: Memory allocation failure. Wanted %u bytes", sizeof(ENetHost));
  3056. return NULL;
  3057. }
  3058. memset(host, 0, sizeof(ENetHost));
  3059. host->peers = (ENetPeer*)enet_malloc(peerCount * sizeof(ENetPeer));
  3060. if (host->peers == NULL) {
  3061. ENET_LOG_ERROR("Creation failure: Peer array memory allocation failure. Wanted %u bytes", peerCount * sizeof(ENetHost));
  3062. enet_free(host);
  3063. return NULL;
  3064. }
  3065. memset(host->peers, 0, peerCount * sizeof(ENetPeer));
  3066. host->socket = enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
  3067. if (host->socket != ENET_SOCKET_NULL) {
  3068. ENET_LOG_TRACE("Socket creation: IPv4 & IPv6 dual stack mode");
  3069. enet_socket_set_option(host->socket, ENET_SOCKOPT_IPV6_V6ONLY, 0);
  3070. }
  3071. int bindResult = enet_socket_bind(host->socket, address);
  3072. if (host->socket == ENET_SOCKET_NULL || (address != NULL && bindResult < 0)) {
  3073. if (host->socket != ENET_SOCKET_NULL) {
  3074. ENET_LOG_TRACE("Socket creation: Cleaning up a old socket.");
  3075. enet_socket_destroy(host->socket);
  3076. }
  3077. ENET_LOG_ERROR("Socket creation: Binding to socket failed with error code %i", bindResult);
  3078. enet_free(host->peers);
  3079. enet_free(host);
  3080. return NULL;
  3081. }
  3082. ENET_LOG_TRACE("Buffers: Setting up");
  3083. if (bufferSize > ENET_HOST_BUFFER_SIZE_MAX)
  3084. bufferSize = ENET_HOST_BUFFER_SIZE_MAX;
  3085. else if (bufferSize < ENET_HOST_BUFFER_SIZE_MIN)
  3086. bufferSize = ENET_HOST_BUFFER_SIZE_MIN;
  3087. ENET_LOG_TRACE("Socket: Setting up options");
  3088. enet_socket_set_option(host->socket, ENET_SOCKOPT_NONBLOCK, 1);
  3089. enet_socket_set_option(host->socket, ENET_SOCKOPT_BROADCAST, 1);
  3090. enet_socket_set_option(host->socket, ENET_SOCKOPT_RCVBUF, bufferSize);
  3091. enet_socket_set_option(host->socket, ENET_SOCKOPT_SNDBUF, bufferSize);
  3092. ENET_LOG_TRACE("Address: Setting up");
  3093. if (address != NULL && enet_socket_get_address(host->socket, &host->address) < 0)
  3094. host->address = *address;
  3095. ENET_LOG_TRACE("Channels: Setting up");
  3096. if (!channelLimit || channelLimit > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  3097. channelLimit = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
  3098. else if (channelLimit < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
  3099. channelLimit = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
  3100. host->randomSeed = (uint32_t)(size_t)host;
  3101. host->randomSeed += enet_host_random_seed();
  3102. host->randomSeed = (host->randomSeed << 16) | (host->randomSeed >> 16);
  3103. host->channelLimit = channelLimit;
  3104. host->incomingBandwidth = incomingBandwidth;
  3105. host->outgoingBandwidth = outgoingBandwidth;
  3106. host->bandwidthThrottleEpoch = 0;
  3107. host->recalculateBandwidthLimits = 0;
  3108. host->preventConnections = 0;
  3109. host->mtu = ENET_HOST_DEFAULT_MTU;
  3110. host->peerCount = peerCount;
  3111. host->commandCount = 0;
  3112. host->bufferCount = 0;
  3113. host->checksumCallback = NULL;
  3114. host->receivedAddress.ipv6 = ENET_HOST_ANY;
  3115. host->receivedAddress.port = 0;
  3116. host->receivedData = NULL;
  3117. host->receivedDataLength = 0;
  3118. host->totalSentData = 0;
  3119. host->totalSentPackets = 0;
  3120. host->totalReceivedData = 0;
  3121. host->totalReceivedPackets = 0;
  3122. host->connectedPeers = 0;
  3123. host->bandwidthLimitedPeers = 0;
  3124. host->duplicatePeers = ENET_PROTOCOL_MAXIMUM_PEER_ID;
  3125. host->maximumPacketSize = ENET_HOST_DEFAULT_MAXIMUM_PACKET_SIZE;
  3126. host->maximumWaitingData = ENET_HOST_DEFAULT_MAXIMUM_WAITING_DATA;
  3127. host->interceptCallback = NULL;
  3128. ENET_LOG_TRACE("Startup: Clearing queues");
  3129. enet_list_clear(&host->dispatchQueue);
  3130. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3131. currentPeer->host = host;
  3132. currentPeer->incomingPeerID = currentPeer - host->peers;
  3133. currentPeer->outgoingSessionID = currentPeer->incomingSessionID = 0xFF;
  3134. currentPeer->data = NULL;
  3135. enet_list_clear(&currentPeer->acknowledgements);
  3136. enet_list_clear(&currentPeer->sentReliableCommands);
  3137. enet_list_clear(&currentPeer->sentUnreliableCommands);
  3138. enet_list_clear(&currentPeer->outgoingCommands);
  3139. enet_list_clear(&currentPeer->dispatchedCommands);
  3140. enet_peer_reset(currentPeer);
  3141. }
  3142. ENET_LOG_TRACE("Startup: Complete. Let's do this.");
  3143. return host;
  3144. }
  3145. void enet_host_destroy(ENetHost* host) {
  3146. ENetPeer* currentPeer;
  3147. ENET_LOG_TRACE("A ENet host object is being destroyed.");
  3148. if (host == NULL)
  3149. return;
  3150. enet_socket_destroy(host->socket);
  3151. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3152. enet_peer_reset(currentPeer);
  3153. }
  3154. enet_free(host->peers);
  3155. enet_free(host);
  3156. }
  3157. void enet_host_prevent_connections(ENetHost* host, uint8_t state) {
  3158. if (host == NULL)
  3159. return;
  3160. host->preventConnections = state;
  3161. }
  3162. ENetPeer* enet_host_connect(ENetHost* host, const ENetAddress* address, size_t channelCount, uint32_t data) {
  3163. ENET_LOG_TRACE("A ENet Host is trying to establish a connection.");
  3164. ENetPeer* currentPeer;
  3165. ENetChannel* channel;
  3166. ENetProtocol command;
  3167. if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
  3168. channelCount = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
  3169. else if (channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  3170. channelCount = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
  3171. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3172. if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED)
  3173. break;
  3174. }
  3175. if (currentPeer >= &host->peers[host->peerCount])
  3176. return NULL;
  3177. currentPeer->channels = (ENetChannel*)enet_malloc(channelCount * sizeof(ENetChannel));
  3178. if (currentPeer->channels == NULL)
  3179. return NULL;
  3180. currentPeer->channelCount = channelCount;
  3181. currentPeer->state = ENET_PEER_STATE_CONNECTING;
  3182. currentPeer->address = *address;
  3183. currentPeer->connectID = ++host->randomSeed;
  3184. if (host->outgoingBandwidth == 0)
  3185. currentPeer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  3186. else
  3187. currentPeer->windowSize = (host->outgoingBandwidth / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  3188. if (currentPeer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  3189. currentPeer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  3190. else if (currentPeer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  3191. currentPeer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  3192. for (channel = currentPeer->channels; channel < &currentPeer->channels[channelCount]; ++channel) {
  3193. channel->outgoingReliableSequenceNumber = 0;
  3194. channel->outgoingUnreliableSequenceNumber = 0;
  3195. channel->incomingReliableSequenceNumber = 0;
  3196. channel->incomingUnreliableSequenceNumber = 0;
  3197. enet_list_clear(&channel->incomingReliableCommands);
  3198. enet_list_clear(&channel->incomingUnreliableCommands);
  3199. channel->usedReliableWindows = 0;
  3200. memset(channel->reliableWindows, 0, sizeof(channel->reliableWindows));
  3201. }
  3202. command.header.command = ENET_PROTOCOL_COMMAND_CONNECT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  3203. command.header.channelID = 0xFF;
  3204. command.connect.outgoingPeerID = ENET_HOST_TO_NET_16(currentPeer->incomingPeerID);
  3205. command.connect.incomingSessionID = currentPeer->incomingSessionID;
  3206. command.connect.outgoingSessionID = currentPeer->outgoingSessionID;
  3207. command.connect.mtu = ENET_HOST_TO_NET_32(currentPeer->mtu);
  3208. command.connect.windowSize = ENET_HOST_TO_NET_32(currentPeer->windowSize);
  3209. command.connect.channelCount = ENET_HOST_TO_NET_32(channelCount);
  3210. command.connect.incomingBandwidth = ENET_HOST_TO_NET_32(host->incomingBandwidth);
  3211. command.connect.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
  3212. command.connect.packetThrottleInterval = ENET_HOST_TO_NET_32(currentPeer->packetThrottleInterval);
  3213. command.connect.packetThrottleAcceleration = ENET_HOST_TO_NET_32(currentPeer->packetThrottleAcceleration);
  3214. command.connect.packetThrottleDeceleration = ENET_HOST_TO_NET_32(currentPeer->packetThrottleDeceleration);
  3215. command.connect.connectID = currentPeer->connectID;
  3216. command.connect.data = ENET_HOST_TO_NET_32(data);
  3217. enet_peer_queue_outgoing_command(currentPeer, &command, NULL, 0, 0);
  3218. return currentPeer;
  3219. }
  3220. void enet_host_broadcast(ENetHost* host, uint8_t channelID, ENetPacket* packet) {
  3221. ENetPeer* currentPeer;
  3222. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3223. ++packet->referenceCount;
  3224. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3225. if (currentPeer->state != ENET_PEER_STATE_CONNECTED)
  3226. continue;
  3227. enet_peer_send(currentPeer, channelID, packet);
  3228. }
  3229. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3230. --packet->referenceCount;
  3231. if (packet->referenceCount == 0)
  3232. enet_packet_destroy(packet);
  3233. }
  3234. void enet_host_broadcast_exclude(ENetHost* host, uint8_t channelID, ENetPacket* packet, ENetPeer* excludedPeer) {
  3235. ENetPeer* currentPeer;
  3236. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3237. ++packet->referenceCount;
  3238. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3239. if (currentPeer->state != ENET_PEER_STATE_CONNECTED || currentPeer == excludedPeer)
  3240. continue;
  3241. enet_peer_send(currentPeer, channelID, packet);
  3242. }
  3243. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3244. --packet->referenceCount;
  3245. if (packet->referenceCount == 0)
  3246. enet_packet_destroy(packet);
  3247. }
  3248. void enet_host_broadcast_selective(ENetHost* host, uint8_t channelID, ENetPacket* packet, ENetPeer** peers, size_t length) {
  3249. ENetPeer* currentPeer;
  3250. size_t i;
  3251. if (host == NULL)
  3252. return;
  3253. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3254. ++packet->referenceCount;
  3255. for (i = 0; i < length; i++) {
  3256. currentPeer = peers[i];
  3257. if (currentPeer == NULL || currentPeer->state != ENET_PEER_STATE_CONNECTED)
  3258. continue;
  3259. enet_peer_send(currentPeer, channelID, packet);
  3260. }
  3261. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3262. --packet->referenceCount;
  3263. if (packet->referenceCount == 0)
  3264. enet_packet_destroy(packet);
  3265. }
  3266. void enet_host_channel_limit(ENetHost* host, size_t channelLimit) {
  3267. if (!channelLimit || channelLimit > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  3268. channelLimit = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
  3269. else if (channelLimit < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
  3270. channelLimit = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
  3271. host->channelLimit = channelLimit;
  3272. }
  3273. void enet_host_bandwidth_limit(ENetHost* host, uint32_t incomingBandwidth, uint32_t outgoingBandwidth) {
  3274. host->incomingBandwidth = incomingBandwidth;
  3275. host->outgoingBandwidth = outgoingBandwidth;
  3276. host->recalculateBandwidthLimits = 1;
  3277. }
  3278. void enet_host_bandwidth_throttle(ENetHost* host) {
  3279. uint32_t timeCurrent = enet_time_get();
  3280. uint32_t elapsedTime = timeCurrent - host->bandwidthThrottleEpoch;
  3281. uint32_t peersRemaining = (uint32_t)host->connectedPeers;
  3282. uint32_t dataTotal = ~0;
  3283. uint32_t bandwidth = ~0;
  3284. uint32_t throttle = 0;
  3285. uint32_t bandwidthLimit = 0;
  3286. int needsAdjustment = host->bandwidthLimitedPeers > 0 ? 1 : 0;
  3287. ENetPeer* peer;
  3288. ENetProtocol command;
  3289. if (elapsedTime < ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL)
  3290. return;
  3291. if (host->outgoingBandwidth == 0 && host->incomingBandwidth == 0)
  3292. return;
  3293. host->bandwidthThrottleEpoch = timeCurrent;
  3294. if (peersRemaining == 0)
  3295. return;
  3296. if (host->outgoingBandwidth != 0) {
  3297. dataTotal = 0;
  3298. bandwidth = (host->outgoingBandwidth * elapsedTime) / 1000;
  3299. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3300. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
  3301. continue;
  3302. dataTotal += peer->outgoingDataTotal;
  3303. }
  3304. }
  3305. while (peersRemaining > 0 && needsAdjustment != 0) {
  3306. needsAdjustment = 0;
  3307. if (dataTotal <= bandwidth)
  3308. throttle = ENET_PEER_PACKET_THROTTLE_SCALE;
  3309. else
  3310. throttle = (bandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / dataTotal;
  3311. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3312. uint32_t peerBandwidth;
  3313. if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->incomingBandwidth == 0 || peer->outgoingBandwidthThrottleEpoch == timeCurrent)
  3314. continue;
  3315. peerBandwidth = (peer->incomingBandwidth * elapsedTime) / 1000;
  3316. if ((throttle * peer->outgoingDataTotal) / ENET_PEER_PACKET_THROTTLE_SCALE <= peerBandwidth)
  3317. continue;
  3318. peer->packetThrottleLimit = (peerBandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / peer->outgoingDataTotal;
  3319. if (peer->packetThrottleLimit == 0)
  3320. peer->packetThrottleLimit = 1;
  3321. if (peer->packetThrottle > peer->packetThrottleLimit)
  3322. peer->packetThrottle = peer->packetThrottleLimit;
  3323. peer->outgoingBandwidthThrottleEpoch = timeCurrent;
  3324. peer->incomingDataTotal = 0;
  3325. peer->outgoingDataTotal = 0;
  3326. needsAdjustment = 1;
  3327. --peersRemaining;
  3328. bandwidth -= peerBandwidth;
  3329. dataTotal -= peerBandwidth;
  3330. }
  3331. }
  3332. if (peersRemaining > 0) {
  3333. if (dataTotal <= bandwidth)
  3334. throttle = ENET_PEER_PACKET_THROTTLE_SCALE;
  3335. else
  3336. throttle = (bandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / dataTotal;
  3337. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3338. if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->outgoingBandwidthThrottleEpoch == timeCurrent)
  3339. continue;
  3340. peer->packetThrottleLimit = throttle;
  3341. if (peer->packetThrottle > peer->packetThrottleLimit)
  3342. peer->packetThrottle = peer->packetThrottleLimit;
  3343. peer->incomingDataTotal = 0;
  3344. peer->outgoingDataTotal = 0;
  3345. }
  3346. }
  3347. if (host->recalculateBandwidthLimits) {
  3348. host->recalculateBandwidthLimits = 0;
  3349. peersRemaining = (uint32_t)host->connectedPeers;
  3350. bandwidth = host->incomingBandwidth;
  3351. needsAdjustment = 1;
  3352. if (bandwidth == 0) {
  3353. bandwidthLimit = 0;
  3354. }
  3355. else {
  3356. while (peersRemaining > 0 && needsAdjustment != 0) {
  3357. needsAdjustment = 0;
  3358. bandwidthLimit = bandwidth / peersRemaining;
  3359. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3360. if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->incomingBandwidthThrottleEpoch == timeCurrent)
  3361. continue;
  3362. if (peer->outgoingBandwidth > 0 && peer->outgoingBandwidth >= bandwidthLimit)
  3363. continue;
  3364. peer->incomingBandwidthThrottleEpoch = timeCurrent;
  3365. needsAdjustment = 1;
  3366. --peersRemaining;
  3367. bandwidth -= peer->outgoingBandwidth;
  3368. }
  3369. }
  3370. }
  3371. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3372. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
  3373. continue;
  3374. command.header.command = ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  3375. command.header.channelID = 0xFF;
  3376. command.bandwidthLimit.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
  3377. if (peer->incomingBandwidthThrottleEpoch == timeCurrent)
  3378. command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32(peer->outgoingBandwidth);
  3379. else
  3380. command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32(bandwidthLimit);
  3381. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  3382. }
  3383. }
  3384. }
  3385. /*
  3386. =======================================================================
  3387. Address
  3388. =======================================================================
  3389. */
  3390. int enet_address_set_ip(ENetAddress* address, const char* ip) {
  3391. int type = AF_INET6;
  3392. void* destination = &address->ipv6;
  3393. if (strchr(ip, ':') == NULL) {
  3394. type = AF_INET;
  3395. memset(address, 0, sizeof(address->ipv4.zeros));
  3396. address->ipv4.ffff = 0xFFFF;
  3397. destination = &address->ipv4.ip;
  3398. }
  3399. if (!inet_pton(type, ip, destination))
  3400. return -1;
  3401. return 0;
  3402. }
  3403. int enet_address_set_hostname(ENetAddress* address, const char* name) {
  3404. struct addrinfo hints, * resultList = NULL, * result = NULL;
  3405. memset(&hints, 0, sizeof(hints));
  3406. hints.ai_family = AF_UNSPEC;
  3407. if (getaddrinfo(name, NULL, &hints, &resultList) != 0) {
  3408. ENET_LOG_ERROR("Getaddrinfo() returned an error");
  3409. return -1;
  3410. }
  3411. for (result = resultList; result != NULL; result = result->ai_next) {
  3412. if (result->ai_addr != NULL && result->ai_addrlen >= sizeof(struct sockaddr_in)) {
  3413. if (result->ai_family == AF_INET) {
  3414. struct sockaddr_in* sin = (struct sockaddr_in*)result->ai_addr;
  3415. memset(address, 0, sizeof(address->ipv4.zeros));
  3416. address->ipv4.ffff = 0xFFFF;
  3417. address->ipv4.ip.s_addr = sin->sin_addr.s_addr;
  3418. freeaddrinfo(resultList);
  3419. return 0;
  3420. }
  3421. else if (result->ai_family == AF_INET6) {
  3422. struct sockaddr_in6* sin = (struct sockaddr_in6*)result->ai_addr;
  3423. address->ipv6 = sin->sin6_addr;
  3424. freeaddrinfo(resultList);
  3425. return 0;
  3426. }
  3427. }
  3428. }
  3429. if (resultList != NULL)
  3430. freeaddrinfo(resultList);
  3431. return enet_address_set_ip(address, name);
  3432. }
  3433. int enet_address_get_ip(const ENetAddress* address, char* ip, size_t ipLength) {
  3434. if (address->ipv4.ffff == 0xFFFF && enet_array_is_zeroed(address->ipv4.zeros, sizeof(address->ipv4.zeros)) == 0) {
  3435. if (inet_ntop(AF_INET, &address->ipv4.ip, ip, ipLength) == NULL) {
  3436. ENET_LOG_ERROR("inet_ntop returned an error.");
  3437. return -1;
  3438. }
  3439. }
  3440. else if (inet_ntop(AF_INET6, &address->ipv6, ip, ipLength) == NULL) {
  3441. ENET_LOG_ERROR("inet_ntop returned an error.");
  3442. return -1;
  3443. }
  3444. return 0;
  3445. }
  3446. int enet_address_get_hostname(const ENetAddress* address, char* name, size_t nameLength) {
  3447. struct sockaddr_in6 sin;
  3448. int err;
  3449. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3450. sin.sin6_family = AF_INET6;
  3451. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3452. sin.sin6_addr = address->ipv6;
  3453. err = getnameinfo((struct sockaddr*)&sin, sizeof(sin), name, nameLength, NULL, 0, NI_NAMEREQD);
  3454. if (!err) {
  3455. if (name != NULL && nameLength > 0 && !memchr(name, '\0', nameLength))
  3456. return -1;
  3457. return 0;
  3458. }
  3459. if (err != EAI_NONAME) {
  3460. ENET_LOG_ERROR("Getnameinfo() returned an error, code %i", err);
  3461. return -1;
  3462. }
  3463. return enet_address_get_ip(address, name, nameLength);
  3464. }
  3465. /*
  3466. =======================================================================
  3467. Platform-specific (Unix)
  3468. =======================================================================
  3469. */
  3470. #ifndef _WIN32
  3471. int enet_initialize(void) {
  3472. ENET_LOG_TRACE("Unix-like Environment: Initialization");
  3473. return 0;
  3474. }
  3475. void enet_deinitialize(void) {
  3476. ENET_LOG_TRACE("Unix-like Environment: Deinitialization");
  3477. }
  3478. uint64_t enet_host_random_seed(void) {
  3479. struct timeval timeVal;
  3480. gettimeofday(&timeVal, NULL);
  3481. return (timeVal.tv_sec * 1000) ^ (timeVal.tv_usec / 1000);
  3482. }
  3483. int enet_socket_bind(ENetSocket socket, const ENetAddress* address) {
  3484. struct sockaddr_in6 sin;
  3485. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3486. sin.sin6_family = AF_INET6;
  3487. if (address != NULL) {
  3488. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3489. sin.sin6_addr = address->ipv6;
  3490. }
  3491. else {
  3492. sin.sin6_port = 0;
  3493. sin.sin6_addr = ENET_HOST_ANY;
  3494. }
  3495. return bind(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6));
  3496. }
  3497. int enet_socket_get_address(ENetSocket socket, ENetAddress* address) {
  3498. struct sockaddr_storage ss;
  3499. socklen_t saLength = sizeof(ss);
  3500. if (getsockname(socket, (struct sockaddr*)&ss, &saLength) == -1) {
  3501. ENET_LOG_ERROR("Getsockname() error.");
  3502. return -1;
  3503. }
  3504. if (ss.ss_family == AF_INET) {
  3505. struct sockaddr_in* sin = (struct sockaddr_in*)&ss;
  3506. memset(address, 0, sizeof(address->ipv4.zeros));
  3507. address->ipv4.ffff = 0xFFFF;
  3508. address->ipv4.ip = sin->sin_addr;
  3509. address->port = ENET_NET_TO_HOST_16(sin->sin_port);
  3510. }
  3511. else if (ss.ss_family == AF_INET6) {
  3512. struct sockaddr_in6* sin = (struct sockaddr_in6*)&ss;
  3513. address->ipv6 = sin->sin6_addr;
  3514. address->port = ENET_NET_TO_HOST_16(sin->sin6_port);
  3515. }
  3516. return 0;
  3517. }
  3518. int enet_socket_listen(ENetSocket socket, int backlog) {
  3519. return listen(socket, backlog < 0 ? SOMAXCONN : backlog);
  3520. }
  3521. ENetSocket enet_socket_create(ENetSocketType type) {
  3522. int socketType = (type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM);
  3523. #ifdef SOCK_CLOEXEC
  3524. socketType |= SOCK_CLOEXEC;
  3525. #endif
  3526. return socket(PF_INET6, socketType, 0);
  3527. }
  3528. int enet_socket_set_option(ENetSocket socket, ENetSocketOption option, int value) {
  3529. int result = -1;
  3530. switch (option) {
  3531. case ENET_SOCKOPT_NONBLOCK:
  3532. result = fcntl(socket, F_SETFL, (value ? O_NONBLOCK : 0) | (fcntl(socket, F_GETFL) & ~O_NONBLOCK));
  3533. break;
  3534. case ENET_SOCKOPT_BROADCAST:
  3535. result = setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char*)&value, sizeof(int));
  3536. break;
  3537. case ENET_SOCKOPT_REUSEADDR:
  3538. result = setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, (char*)&value, sizeof(int));
  3539. break;
  3540. case ENET_SOCKOPT_RCVBUF:
  3541. result = setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char*)&value, sizeof(int));
  3542. break;
  3543. case ENET_SOCKOPT_SNDBUF:
  3544. result = setsockopt(socket, SOL_SOCKET, SO_SNDBUF, (char*)&value, sizeof(int));
  3545. break;
  3546. case ENET_SOCKOPT_RCVTIMEO: {
  3547. struct timeval timeVal;
  3548. timeVal.tv_sec = value / 1000;
  3549. timeVal.tv_usec = (value % 1000) * 1000;
  3550. result = setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (char*)&timeVal, sizeof(struct timeval));
  3551. break;
  3552. }
  3553. case ENET_SOCKOPT_SNDTIMEO: {
  3554. struct timeval timeVal;
  3555. timeVal.tv_sec = value / 1000;
  3556. timeVal.tv_usec = (value % 1000) * 1000;
  3557. result = setsockopt(socket, SOL_SOCKET, SO_SNDTIMEO, (char*)&timeVal, sizeof(struct timeval));
  3558. break;
  3559. }
  3560. case ENET_SOCKOPT_NODELAY:
  3561. result = setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&value, sizeof(int));
  3562. break;
  3563. case ENET_SOCKOPT_IPV6_V6ONLY:
  3564. result = setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&value, sizeof(int));
  3565. break;
  3566. default:
  3567. break;
  3568. }
  3569. return result == -1 ? -1 : 0;
  3570. }
  3571. int enet_socket_get_option(ENetSocket socket, ENetSocketOption option, int* value) {
  3572. int result = -1;
  3573. socklen_t len;
  3574. switch (option) {
  3575. case ENET_SOCKOPT_ERROR:
  3576. len = sizeof(int);
  3577. result = getsockopt(socket, SOL_SOCKET, SO_ERROR, value, &len);
  3578. break;
  3579. default:
  3580. break;
  3581. }
  3582. return result == -1 ? -1 : 0;
  3583. }
  3584. int enet_socket_connect(ENetSocket socket, const ENetAddress* address) {
  3585. int result = -1;
  3586. struct sockaddr_in6 sin;
  3587. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3588. sin.sin6_family = AF_INET6;
  3589. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3590. sin.sin6_addr = address->ipv6;
  3591. result = connect(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6));
  3592. if (result == -1 && errno == EINPROGRESS)
  3593. return 0;
  3594. return result;
  3595. }
  3596. ENetSocket enet_socket_accept(ENetSocket socket, ENetAddress* address) {
  3597. int result = -1;
  3598. struct sockaddr_in6 sin;
  3599. socklen_t sinLength = sizeof(struct sockaddr_in6);
  3600. result = accept(socket, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? &sinLength : NULL);
  3601. if (result == -1)
  3602. return ENET_SOCKET_NULL;
  3603. if (address != NULL) {
  3604. address->ipv6 = sin.sin6_addr;
  3605. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3606. }
  3607. return result;
  3608. }
  3609. int enet_socket_shutdown(ENetSocket socket, ENetSocketShutdown how) {
  3610. return shutdown(socket, (int)how);
  3611. }
  3612. void enet_socket_destroy(ENetSocket socket) {
  3613. if (socket != ENET_SOCKET_NULL)
  3614. close(socket);
  3615. }
  3616. int enet_socket_send(ENetSocket socket, const ENetAddress* address, const ENetBuffer* buffers, size_t bufferCount) {
  3617. struct msghdr msgHdr;
  3618. struct sockaddr_in6 sin;
  3619. int sentLength;
  3620. memset(&msgHdr, 0, sizeof(struct msghdr));
  3621. if (address != NULL) {
  3622. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3623. sin.sin6_family = AF_INET6;
  3624. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3625. sin.sin6_addr = address->ipv6;
  3626. msgHdr.msg_name = &sin;
  3627. msgHdr.msg_namelen = sizeof(struct sockaddr_in6);
  3628. }
  3629. msgHdr.msg_iov = (struct iovec*)buffers;
  3630. msgHdr.msg_iovlen = bufferCount;
  3631. sentLength = sendmsg(socket, &msgHdr, MSG_NOSIGNAL);
  3632. if (sentLength == -1) {
  3633. if (errno == EWOULDBLOCK)
  3634. return 0;
  3635. ENET_LOG_ERROR("An error occurred sending data to socket. sendMsg result is negative, returned code is %i.", errno);
  3636. return -1;
  3637. }
  3638. return sentLength;
  3639. }
  3640. int enet_socket_receive(ENetSocket socket, ENetAddress* address, ENetBuffer* buffers, size_t bufferCount) {
  3641. struct msghdr msgHdr;
  3642. struct sockaddr_in6 sin;
  3643. int recvLength;
  3644. memset(&msgHdr, 0, sizeof(struct msghdr));
  3645. if (address != NULL) {
  3646. msgHdr.msg_name = &sin;
  3647. msgHdr.msg_namelen = sizeof(struct sockaddr_in6);
  3648. }
  3649. msgHdr.msg_iov = (struct iovec*)buffers;
  3650. msgHdr.msg_iovlen = bufferCount;
  3651. recvLength = recvmsg(socket, &msgHdr, MSG_NOSIGNAL);
  3652. if (recvLength == -1) {
  3653. if (errno == EWOULDBLOCK)
  3654. return 0;
  3655. ENET_LOG_ERROR("An error occurred receiving data from socket. recvLength result is negative, returned code is %i.", errno);
  3656. return -1;
  3657. }
  3658. if (msgHdr.msg_flags & MSG_TRUNC) {
  3659. ENET_LOG_ERROR("Incoming socket message header was truncated.");
  3660. return -2;
  3661. }
  3662. if (address != NULL) {
  3663. address->ipv6 = sin.sin6_addr;
  3664. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3665. }
  3666. return recvLength;
  3667. }
  3668. int enet_socket_set_select(ENetSocket maxSocket, ENetSocketSet* readSet, ENetSocketSet* writeSet, uint32_t timeout) {
  3669. struct timeval timeVal;
  3670. timeVal.tv_sec = timeout / 1000;
  3671. timeVal.tv_usec = (timeout % 1000) * 1000;
  3672. return select(maxSocket + 1, readSet, writeSet, NULL, &timeVal);
  3673. }
  3674. int enet_socket_wait(ENetSocket socket, uint32_t* condition, uint64_t timeout) {
  3675. struct pollfd pollSocket;
  3676. int pollCount;
  3677. pollSocket.fd = socket;
  3678. pollSocket.events = 0;
  3679. if (*condition & ENET_SOCKET_WAIT_SEND)
  3680. pollSocket.events |= POLLOUT;
  3681. if (*condition & ENET_SOCKET_WAIT_RECEIVE)
  3682. pollSocket.events |= POLLIN;
  3683. pollCount = poll(&pollSocket, 1, timeout);
  3684. if (pollCount < 0) {
  3685. if (errno == EINTR && *condition & ENET_SOCKET_WAIT_INTERRUPT) {
  3686. *condition = ENET_SOCKET_WAIT_INTERRUPT;
  3687. return 0;
  3688. }
  3689. ENET_LOG_ERROR("Socket wait: pollCount < 0, %i", pollCount);
  3690. return -1;
  3691. }
  3692. *condition = ENET_SOCKET_WAIT_NONE;
  3693. if (pollCount == 0)
  3694. return 0;
  3695. if (pollSocket.revents & POLLOUT)
  3696. *condition |= ENET_SOCKET_WAIT_SEND;
  3697. if (pollSocket.revents & POLLIN)
  3698. *condition |= ENET_SOCKET_WAIT_RECEIVE;
  3699. return 0;
  3700. }
  3701. #endif
  3702. /*
  3703. =======================================================================
  3704. Platform-specific (Windows)
  3705. =======================================================================
  3706. */
  3707. #ifdef _WIN32
  3708. int enet_initialize(void) {
  3709. WORD versionRequested = MAKEWORD(2, 2);
  3710. WSADATA wsaData;
  3711. ENET_LOG_TRACE("Windows: ENet init");
  3712. if (WSAStartup(versionRequested, &wsaData)) {
  3713. ENET_LOG_ERROR("WSAStartup failure");
  3714. return -1;
  3715. }
  3716. if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
  3717. ENET_LOG_ERROR("Winsock version mismatch");
  3718. WSACleanup();
  3719. return -1;
  3720. }
  3721. timeBeginPeriod(1);
  3722. return 0;
  3723. }
  3724. void enet_deinitialize(void) {
  3725. ENET_LOG_TRACE("Windows: ENet Deinit");
  3726. timeEndPeriod(1);
  3727. WSACleanup();
  3728. }
  3729. uint64_t enet_host_random_seed(void) {
  3730. return (uint64_t)timeGetTime();
  3731. }
  3732. int enet_socket_bind(ENetSocket socket, const ENetAddress* address) {
  3733. struct sockaddr_in6 sin;
  3734. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3735. sin.sin6_family = AF_INET6;
  3736. if (address != NULL) {
  3737. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3738. sin.sin6_addr = address->ipv6;
  3739. }
  3740. else {
  3741. sin.sin6_port = 0;
  3742. sin.sin6_addr = in6addr_any;
  3743. }
  3744. return bind(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6)) == SOCKET_ERROR ? -1 : 0;
  3745. }
  3746. int enet_socket_get_address(ENetSocket socket, ENetAddress* address) {
  3747. struct sockaddr_storage ss;
  3748. int saLength = sizeof(ss);
  3749. if (getsockname(socket, (struct sockaddr*)&ss, &saLength) == -1)
  3750. ENET_LOG_ERROR("Socket getsockname failure.");
  3751. return -1;
  3752. if (ss.ss_family == AF_INET) {
  3753. struct sockaddr_in* sin = (struct sockaddr_in*)&ss;
  3754. memset(address, 0, sizeof(address->ipv4.zeros));
  3755. address->ipv4.ffff = 0xFFFF;
  3756. address->ipv4.ip = sin->sin_addr;
  3757. address->port = ENET_NET_TO_HOST_16(sin->sin_port);
  3758. }
  3759. else if (ss.ss_family == AF_INET6) {
  3760. struct sockaddr_in6* sin = (struct sockaddr_in6*)&ss;
  3761. address->ipv6 = sin->sin6_addr;
  3762. address->port = ENET_NET_TO_HOST_16(sin->sin6_port);
  3763. }
  3764. return 0;
  3765. }
  3766. int enet_socket_listen(ENetSocket socket, int backlog) {
  3767. return listen(socket, backlog < 0 ? SOMAXCONN : backlog) == SOCKET_ERROR ? -1 : 0;
  3768. }
  3769. ENetSocket enet_socket_create(ENetSocketType type) {
  3770. return socket(PF_INET6, type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM, 0);
  3771. }
  3772. int enet_socket_set_option(ENetSocket socket, ENetSocketOption option, int value) {
  3773. int result = SOCKET_ERROR;
  3774. switch (option) {
  3775. case ENET_SOCKOPT_NONBLOCK: {
  3776. u_long nonBlocking = (u_long)value;
  3777. result = ioctlsocket(socket, FIONBIO, &nonBlocking);
  3778. break;
  3779. }
  3780. case ENET_SOCKOPT_BROADCAST:
  3781. result = setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char*)&value, sizeof(int));
  3782. break;
  3783. case ENET_SOCKOPT_REUSEADDR:
  3784. result = setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, (char*)&value, sizeof(int));
  3785. break;
  3786. case ENET_SOCKOPT_RCVBUF:
  3787. result = setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char*)&value, sizeof(int));
  3788. break;
  3789. case ENET_SOCKOPT_SNDBUF:
  3790. result = setsockopt(socket, SOL_SOCKET, SO_SNDBUF, (char*)&value, sizeof(int));
  3791. break;
  3792. case ENET_SOCKOPT_RCVTIMEO:
  3793. result = setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (char*)&value, sizeof(int));
  3794. break;
  3795. case ENET_SOCKOPT_SNDTIMEO:
  3796. result = setsockopt(socket, SOL_SOCKET, SO_SNDTIMEO, (char*)&value, sizeof(int));
  3797. break;
  3798. case ENET_SOCKOPT_NODELAY:
  3799. result = setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&value, sizeof(int));
  3800. break;
  3801. case ENET_SOCKOPT_IPV6_V6ONLY:
  3802. result = setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&value, sizeof(int));
  3803. break;
  3804. default:
  3805. break;
  3806. }
  3807. return result == SOCKET_ERROR ? -1 : 0;
  3808. }
  3809. int enet_socket_get_option(ENetSocket socket, ENetSocketOption option, int* value) {
  3810. int result = SOCKET_ERROR, len;
  3811. switch (option) {
  3812. case ENET_SOCKOPT_ERROR:
  3813. len = sizeof(int);
  3814. result = getsockopt(socket, SOL_SOCKET, SO_ERROR, (char*)value, &len);
  3815. break;
  3816. default:
  3817. break;
  3818. }
  3819. return result == SOCKET_ERROR ? -1 : 0;
  3820. }
  3821. int enet_socket_connect(ENetSocket socket, const ENetAddress* address) {
  3822. int result = -1;
  3823. struct sockaddr_in6 sin;
  3824. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3825. sin.sin6_family = AF_INET6;
  3826. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3827. sin.sin6_addr = address->ipv6;
  3828. result = connect(socket, (struct sockaddr*)&sin, sizeof(struct sockaddr_in6));
  3829. int lastError = WSAGetLastError();
  3830. if (result == SOCKET_ERROR && lastError != WSAEWOULDBLOCK) {
  3831. ENET_LOG_ERROR("Socket connect failure, return code: %i, WSAGetLastError: %i", result, lastError);
  3832. return -1;
  3833. }
  3834. ENET_LOG_TRACE("Socket connect.");
  3835. return 0;
  3836. }
  3837. ENetSocket enet_socket_accept(ENetSocket socket, ENetAddress* address) {
  3838. SOCKET result;
  3839. struct sockaddr_in6 sin;
  3840. int sinLength = sizeof(struct sockaddr_in6);
  3841. result = accept(socket, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? &sinLength : NULL);
  3842. if (result == INVALID_SOCKET) {
  3843. ENET_LOG_ERROR("Tried to accept from an invalid socket");
  3844. return ENET_SOCKET_NULL;
  3845. }
  3846. if (address != NULL) {
  3847. address->ipv6 = sin.sin6_addr;
  3848. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3849. }
  3850. return result;
  3851. }
  3852. int enet_socket_shutdown(ENetSocket socket, ENetSocketShutdown how) {
  3853. ENET_LOG_TRACE("Socket shutdown");
  3854. return shutdown(socket, (int)how) == SOCKET_ERROR ? -1 : 0;
  3855. }
  3856. void enet_socket_destroy(ENetSocket socket) {
  3857. if (socket != INVALID_SOCKET) {
  3858. ENET_LOG_TRACE("Socket destroyed");
  3859. closesocket(socket);
  3860. }
  3861. }
  3862. int enet_socket_send(ENetSocket socket, const ENetAddress* address, const ENetBuffer* buffers, size_t bufferCount) {
  3863. int lastError = 0;
  3864. struct sockaddr_in6 sin;
  3865. DWORD sentLength = 0;
  3866. if (address != NULL) {
  3867. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3868. sin.sin6_family = AF_INET6;
  3869. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3870. sin.sin6_addr = address->ipv6;
  3871. }
  3872. if (WSASendTo(socket, (LPWSABUF)buffers, (DWORD)bufferCount, &sentLength, 0, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? sizeof(struct sockaddr_in6) : 0, NULL, NULL) == SOCKET_ERROR) {
  3873. lastError = WSAGetLastError();
  3874. if (lastError != WSAEWOULDBLOCK) {
  3875. // Error occurred and it wasn't a "This would block" response.
  3876. ENET_LOG_ERROR("WSASendTo reported an error, code returned was %i.", lastError);
  3877. return -1;
  3878. }
  3879. else {
  3880. return 0;
  3881. }
  3882. }
  3883. return (int)sentLength;
  3884. }
  3885. int enet_socket_receive(ENetSocket socket, ENetAddress* address, ENetBuffer* buffers, size_t bufferCount) {
  3886. int lastError = 0;
  3887. INT sinLength = sizeof(struct sockaddr_in6);
  3888. DWORD flags = 0, recvLength = 0;
  3889. struct sockaddr_in6 sin;
  3890. if (WSARecvFrom(socket, (LPWSABUF)buffers, (DWORD)bufferCount, &recvLength, &flags, address != NULL ? (struct sockaddr*)&sin : NULL, address != NULL ? &sinLength : NULL, NULL, NULL) == SOCKET_ERROR) {
  3891. lastError = WSAGetLastError();
  3892. switch (lastError) {
  3893. case WSAEWOULDBLOCK:
  3894. case WSAECONNRESET:
  3895. return 0;
  3896. }
  3897. ENET_LOG_ERROR("Socket receive failure, WSA return code %i", lastError);
  3898. return -1;
  3899. }
  3900. if (flags & MSG_PARTIAL) {
  3901. ENET_LOG_ERROR("Partial socket receive message");
  3902. return -2;
  3903. }
  3904. if (address != NULL) {
  3905. address->ipv6 = sin.sin6_addr;
  3906. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3907. }
  3908. return (int)recvLength;
  3909. }
  3910. int enet_socket_set_select(ENetSocket maxSocket, ENetSocketSet* readSet, ENetSocketSet* writeSet, uint32_t timeout) {
  3911. struct timeval timeVal;
  3912. timeVal.tv_sec = timeout / 1000;
  3913. timeVal.tv_usec = (timeout % 1000) * 1000;
  3914. return select(maxSocket + 1, readSet, writeSet, NULL, &timeVal);
  3915. }
  3916. int enet_socket_wait(ENetSocket socket, uint32_t* condition, uint64_t timeout) {
  3917. fd_set readSet, writeSet;
  3918. struct timeval timeVal;
  3919. int selectCount;
  3920. timeVal.tv_sec = timeout / 1000;
  3921. timeVal.tv_usec = (timeout % 1000) * 1000;
  3922. FD_ZERO(&readSet);
  3923. FD_ZERO(&writeSet);
  3924. if (*condition & ENET_SOCKET_WAIT_SEND)
  3925. FD_SET(socket, &writeSet);
  3926. if (*condition & ENET_SOCKET_WAIT_RECEIVE)
  3927. FD_SET(socket, &readSet);
  3928. selectCount = select(socket + 1, &readSet, &writeSet, NULL, &timeVal);
  3929. if (selectCount < 0) {
  3930. ENET_LOG_ERROR("Socket wait: selectCount < 0; was %i", selectCount);
  3931. return -1;
  3932. }
  3933. *condition = ENET_SOCKET_WAIT_NONE;
  3934. if (selectCount == 0)
  3935. return 0;
  3936. if (FD_ISSET(socket, &writeSet))
  3937. *condition |= ENET_SOCKET_WAIT_SEND;
  3938. if (FD_ISSET(socket, &readSet))
  3939. *condition |= ENET_SOCKET_WAIT_RECEIVE;
  3940. return 0;
  3941. }
  3942. #endif
  3943. /*
  3944. =======================================================================
  3945. Extended functionality
  3946. =======================================================================
  3947. */
  3948. void* enet_packet_get_data(const ENetPacket* packet) {
  3949. return (void*)packet->data;
  3950. }
  3951. void* enet_packet_get_user_data(const ENetPacket* packet) {
  3952. return packet->userData;
  3953. }
  3954. void enet_packet_set_user_data(ENetPacket* packet, void* userData) {
  3955. packet->userData = userData;
  3956. }
  3957. int enet_packet_get_length(const ENetPacket* packet) {
  3958. return packet->dataLength;
  3959. }
  3960. void enet_packet_set_free_callback(ENetPacket* packet, ENetPacketFreeCallback callback) {
  3961. packet->freeCallback = callback;
  3962. }
  3963. int enet_packet_check_references(const ENetPacket* packet) {
  3964. return (int)packet->referenceCount;
  3965. }
  3966. void enet_packet_dispose(ENetPacket* packet) {
  3967. if (packet->referenceCount == 0)
  3968. enet_packet_destroy(packet);
  3969. }
  3970. uint32_t enet_host_get_peers_count(const ENetHost* host) {
  3971. return host->connectedPeers;
  3972. }
  3973. uint32_t enet_host_get_packets_sent(const ENetHost* host) {
  3974. return host->totalSentPackets;
  3975. }
  3976. uint32_t enet_host_get_packets_received(const ENetHost* host) {
  3977. return host->totalReceivedPackets;
  3978. }
  3979. uint32_t enet_host_get_bytes_sent(const ENetHost* host) {
  3980. return host->totalSentData;
  3981. }
  3982. uint32_t enet_host_get_bytes_received(const ENetHost* host) {
  3983. return host->totalReceivedData;
  3984. }
  3985. void enet_host_set_max_duplicate_peers(ENetHost* host, uint16_t number) {
  3986. if (number < 1)
  3987. number = 1;
  3988. if (number > ENET_PROTOCOL_MAXIMUM_PEER_ID)
  3989. number = ENET_PROTOCOL_MAXIMUM_PEER_ID;
  3990. host->duplicatePeers = number;
  3991. }
  3992. void enet_host_set_intercept_callback(ENetHost* host, ENetInterceptCallback callback) {
  3993. host->interceptCallback = callback;
  3994. }
  3995. void enet_host_set_checksum_callback(ENetHost* host, ENetChecksumCallback callback) {
  3996. host->checksumCallback = callback;
  3997. }
  3998. uint32_t enet_peer_get_id(const ENetPeer* peer) {
  3999. return peer->incomingPeerID;
  4000. }
  4001. int enet_peer_get_ip(const ENetPeer* peer, char* ip, size_t ipLength) {
  4002. return enet_address_get_ip(&peer->address, ip, ipLength);
  4003. }
  4004. uint16_t enet_peer_get_port(const ENetPeer* peer) {
  4005. return peer->address.port;
  4006. }
  4007. uint32_t enet_peer_get_mtu(const ENetPeer* peer) {
  4008. return peer->mtu;
  4009. }
  4010. ENetPeerState enet_peer_get_state(const ENetPeer* peer) {
  4011. return peer->state;
  4012. }
  4013. uint32_t enet_peer_get_rtt(const ENetPeer* peer) {
  4014. return peer->roundTripTime;
  4015. }
  4016. uint32_t enet_peer_get_last_rtt(const ENetPeer* peer) {
  4017. return peer->lastRoundTripTime;
  4018. }
  4019. uint32_t enet_peer_get_lastsendtime(const ENetPeer* peer) {
  4020. return peer->lastSendTime;
  4021. }
  4022. uint32_t enet_peer_get_lastreceivetime(const ENetPeer* peer) {
  4023. return peer->lastReceiveTime;
  4024. }
  4025. uint64_t enet_peer_get_packets_sent(const ENetPeer* peer) {
  4026. return peer->totalPacketsSent;
  4027. }
  4028. uint64_t enet_peer_get_packets_lost(const ENetPeer* peer) {
  4029. return peer->totalPacketsLost;
  4030. }
  4031. float enet_peer_get_packets_throttle(const ENetPeer* peer) {
  4032. return peer->packetThrottle / (float)ENET_PEER_PACKET_THROTTLE_SCALE * 100.0f;
  4033. }
  4034. uint64_t enet_peer_get_bytes_sent(const ENetPeer* peer) {
  4035. return peer->totalDataSent;
  4036. }
  4037. uint64_t enet_peer_get_bytes_received(const ENetPeer* peer) {
  4038. return peer->totalDataReceived;
  4039. }
  4040. void* enet_peer_get_data(const ENetPeer* peer) {
  4041. return (void*)peer->data;
  4042. }
  4043. void enet_peer_set_data(ENetPeer* peer, const void* data) {
  4044. peer->data = (uint32_t*)data;
  4045. }
  4046. #ifdef _MSC_VER
  4047. #pragma warning(pop)
  4048. #endif
  4049. #endif // ENET_IMPLEMENTATION
  4050. #endif // ENET_H