enet.h 179 KB

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  1. /*
  2. * ENet reliable UDP networking library
  3. * Improvements (c) SoftwareGuy (Coburn), c6burns
  4. * Original copyright (c) 2018 Lee Salzman, Vladyslav Hrytsenko, Dominik Madarász, Stanislav Denisov
  5. *
  6. * Permission is hereby granted, free of charge, to any person obtaining a copy
  7. * of this software and associated documentation files (the "Software"), to deal
  8. * in the Software without restriction, including without limitation the rights
  9. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10. * copies of the Software, and to permit persons to whom the Software is
  11. * furnished to do so, subject to the following conditions:
  12. *
  13. * The above copyright notice and this permission notice shall be included in all
  14. * copies or substantial portions of the Software.
  15. *
  16. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22. * SOFTWARE.
  23. */
  24. #ifndef ENET_H
  25. #define ENET_H
  26. #include <stdbool.h>
  27. #include <stdint.h>
  28. #include <stdlib.h>
  29. #include <time.h>
  30. // Include the ENET Logging/Tracing Functionality.
  31. #include "enet_log.h"
  32. #define ENET_VERSION_MAJOR 2
  33. #define ENET_VERSION_MINOR 4
  34. #define ENET_VERSION_PATCH 0
  35. #define ENET_VERSION_CREATE(major, minor, patch) (((major) << 16) | ((minor) << 8) | (patch))
  36. #define ENET_VERSION_GET_MAJOR(version) (((version) >> 16) & 0xFF)
  37. #define ENET_VERSION_GET_MINOR(version) (((version) >> 8) & 0xFF)
  38. #define ENET_VERSION_GET_PATCH(version) ((version) & 0xFF)
  39. #define ENET_VERSION ENET_VERSION_CREATE(ENET_VERSION_MAJOR, ENET_VERSION_MINOR, ENET_VERSION_PATCH)
  40. #define ENET_TIME_OVERFLOW 86400000
  41. #define ENET_TIME_LESS(a, b) ((a) - (b) >= ENET_TIME_OVERFLOW)
  42. #define ENET_TIME_GREATER(a, b) ((b) - (a) >= ENET_TIME_OVERFLOW)
  43. #define ENET_TIME_LESS_EQUAL(a, b) (!ENET_TIME_GREATER(a, b))
  44. #define ENET_TIME_GREATER_EQUAL(a, b) (!ENET_TIME_LESS(a, b))
  45. #define ENET_TIME_DIFFERENCE(a, b) ((a) - (b) >= ENET_TIME_OVERFLOW ? (b) - (a) : (a) - (b))
  46. #define ENET_MAX(x, y) ((x) > (y) ? (x) : (y))
  47. #define ENET_MIN(x, y) ((x) < (y) ? (x) : (y))
  48. #define ENET_SRTT_INITIAL 1.0
  49. #define ENET_SRTT_PARA_G 0.125
  50. /*
  51. =======================================================================
  52. ENET Error Codes
  53. =======================================================================
  54. */
  55. // General
  56. #define ENET_LIBRARY_TOO_OLD -1
  57. #define ENET_LIBRARY_MEMALLOC_NULL -2
  58. // Address and Socket Lookup failures
  59. #define ENET_INET_PTON_FAILURE -5
  60. #define ENET_GETADDRINFO_FAILURE -6
  61. #define ENET_GETSOCKINFO_FAILURE -7
  62. // Host errors
  63. #define ENET_HOST_CHANNEL_GREATER_OR_WEIRD_PEER_STATE -10
  64. #define ENET_HOST_INTERCEPT_FAILURE -11
  65. #define ENET_HOST_FUNKYSTUFF -12
  66. #define ENET_HOST_RANDOMERROR -13
  67. // Dispatching errors
  68. #define ENET_DISPATCH_INCOMING_FAILURE -20
  69. #define ENET_DISPATCH_OUTGOING_FAILURE -21
  70. // Servicing errors
  71. #define ENET_SERVICE_SEND_OUTGOING_FAILURE -22
  72. #define ENET_SERVICE_RECEIVE_INCOMING_FAILURE -23
  73. // Protocol errors
  74. #define ENET_PROTOCOL_CMD_FAIL -25
  75. #define ENET_PROTOCOL_SEND_FAIL -26
  76. // Packet errors
  77. #define ENET_PACKET_DATA_FRAGMENT_WEIRDNESS -30
  78. #define ENET_PACKET_DATA_LENGTH_WEIRDNESS -31
  79. #define ENET_PACKET_DATA_LENGTH_NEGATIVE -32
  80. #define ENET_PACKET_STARTCMD_NULL -33
  81. #define ENET_PACKET_IS_BAD -34
  82. // Peer errors
  83. #define ENET_PEER_NOT_CONNECTED_CORRECTLY -40
  84. #define ENET_PEER_BAD_COMMAND_NUMBER -41
  85. #define ENET_PEER_BECAME_ZOMBIE -42
  86. #define ENET_PEER_SENDFAIL_GENERIC -43
  87. #define ENET_PEER_SENDFAIL_FRAGMENTOVERLOAD -44
  88. #define ENET_PEER_SENDFAIL_FRAGMENTNULL -45
  89. // Socket errors
  90. #define ENET_SOCKET_MSGTRUNCATED -50
  91. #define ENET_SOCKET_WINSOCKMISMATCH -51
  92. #define ENET_SOCKET_WSAFAILED -52
  93. // #define ENET_SOCKET_INVALID -53 <-- conflicts with existing defintion, don't uncomment this
  94. #define ENET_SOCKET_MSGPARTIAL -54
  95. #define ENET_SOCKET_WAITPOLL_NEGATIVE -55
  96. #define ENET_SOCKET_SEND_WEIRDNESS -56
  97. #define ENET_SOCKET_RECEIVE_WEIRDNESS -57
  98. #define ENET_SOCKET_GETSOCKNAME_FAILURE -58
  99. // Queue errors
  100. #define ENET_PEER_QUEUE_INCOMING_FAILURE -60
  101. #define ENET_PEER_QUEUE_OUTGOING_FAILURE -61
  102. #define ENET_PEER_QUEUE_OUTGOING_NULL -62
  103. // "WTF happened here?" for when you don't know what ENET is doing
  104. #define ENET_GENERAL_WHAT_THE_F -255
  105. /*
  106. =======================================================================
  107. System differences
  108. =======================================================================
  109. */
  110. #ifdef _WIN32
  111. #if defined(_MSC_VER) && defined(ENET_IMPLEMENTATION)
  112. #pragma warning(disable: 4244) /* 64-bit to 32-bit integer conversion */
  113. #pragma warning(disable: 4267) /* size_t to integer conversion */
  114. #endif
  115. #ifndef ENET_NO_PRAGMA_LINK
  116. #pragma comment(lib, "ws2_32.lib")
  117. #pragma comment(lib, "winmm.lib")
  118. #endif
  119. #if _MSC_VER >= 1910
  120. /* It looks like there were changes as of Visual Studio 2017 and there are no 32/64 bit
  121. versions of _InterlockedExchange[operation], only InterlockedExchange[operation]
  122. (without leading underscore), so we have to distinguish between compiler versions */
  123. #define NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  124. #endif
  125. #ifdef __GNUC__
  126. #if (_WIN32_WINNT < 0x0501)
  127. #undef _WIN32_WINNT
  128. #define _WIN32_WINNT 0x0501
  129. #endif
  130. #endif
  131. #include <winsock2.h>
  132. #include <ws2tcpip.h>
  133. #include <mmsystem.h>
  134. #include <intrin.h>
  135. #if defined(_WIN32) && defined(_MSC_VER)
  136. #if _MSC_VER < 1900
  137. typedef struct timespec {
  138. long tv_sec;
  139. long tv_nsec;
  140. };
  141. #endif
  142. #define CLOCK_MONOTONIC 0
  143. #endif
  144. typedef SOCKET ENetSocket;
  145. #define ENET_SOCKET_NULL INVALID_SOCKET
  146. typedef struct {
  147. size_t dataLength;
  148. void* data;
  149. } ENetBuffer;
  150. #define ENET_CALLBACK __cdecl
  151. #ifdef ENET_DLL
  152. #ifdef ENET_IMPLEMENTATION
  153. #define ENET_API __declspec(dllexport)
  154. #else
  155. #define ENET_API __declspec(dllimport)
  156. #endif
  157. #else
  158. #define ENET_API extern
  159. #endif
  160. #else
  161. #include <sys/types.h>
  162. #include <sys/ioctl.h>
  163. #include <sys/time.h>
  164. #include <sys/socket.h>
  165. #include <poll.h>
  166. #include <arpa/inet.h>
  167. #include <netinet/in.h>
  168. #include <netinet/tcp.h>
  169. #include <netdb.h>
  170. #include <unistd.h>
  171. #include <string.h>
  172. #include <errno.h>
  173. #include <fcntl.h>
  174. #ifdef __APPLE__
  175. #include <mach/clock.h>
  176. #include <mach/mach.h>
  177. #include <Availability.h>
  178. #endif
  179. #ifndef MSG_NOSIGNAL
  180. #define MSG_NOSIGNAL 0
  181. #endif
  182. #ifdef MSG_MAXIOVLEN
  183. #define ENET_BUFFER_MAXIMUM MSG_MAXIOVLEN
  184. #endif
  185. typedef int ENetSocket;
  186. #define ENET_SOCKET_NULL -1
  187. typedef struct {
  188. void* data;
  189. size_t dataLength;
  190. } ENetBuffer;
  191. #define ENET_CALLBACK
  192. #define ENET_API extern
  193. #endif
  194. #ifndef ENET_BUFFER_MAXIMUM
  195. #define ENET_BUFFER_MAXIMUM (1 + 2 * ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS)
  196. #endif
  197. #define ENET_HOST_ANY in6addr_any
  198. #define ENET_PORT_ANY 0
  199. #define ENET_HOST_SIZE 1025
  200. #define ENET_HOST_TO_NET_16(value) (htons(value))
  201. #define ENET_HOST_TO_NET_32(value) (htonl(value))
  202. #define ENET_NET_TO_HOST_16(value) (ntohs(value))
  203. #define ENET_NET_TO_HOST_32(value) (ntohl(value))
  204. #ifdef __cplusplus
  205. extern "C" {
  206. #endif
  207. /*
  208. =======================================================================
  209. Internals
  210. =======================================================================
  211. */
  212. typedef uint8_t enet_uint8;
  213. typedef uint16_t enet_uint16;
  214. typedef uint32_t enet_uint32;
  215. typedef uint64_t enet_uint64;
  216. typedef enet_uint32 ENetVersion;
  217. typedef fd_set ENetSocketSet;
  218. typedef struct _ENetCallbacks {
  219. void* (ENET_CALLBACK* malloc)(size_t size);
  220. void (ENET_CALLBACK* free)(void* memory);
  221. void (ENET_CALLBACK* noMemory)(void);
  222. } ENetCallbacks;
  223. extern void* enet_malloc(size_t);
  224. extern void enet_free(void*);
  225. typedef struct _ENetListNode {
  226. struct _ENetListNode* next;
  227. struct _ENetListNode* previous;
  228. } ENetListNode;
  229. typedef ENetListNode* ENetListIterator;
  230. typedef struct _ENetList {
  231. ENetListNode sentinel;
  232. } ENetList;
  233. extern ENetListIterator enet_list_insert(ENetListIterator, void*);
  234. extern ENetListIterator enet_list_move(ENetListIterator, void*, void*);
  235. extern void* enet_list_remove(ENetListIterator);
  236. extern void enet_list_clear(ENetList*);
  237. extern size_t enet_list_size(ENetList*);
  238. #define enet_list_begin(list) ((list)->sentinel.next)
  239. #define enet_list_end(list) (&(list)->sentinel)
  240. #define enet_list_empty(list) (enet_list_begin(list) == enet_list_end(list))
  241. #define enet_list_next(iterator) ((iterator)->next)
  242. #define enet_list_previous(iterator) ((iterator)->previous)
  243. #define enet_list_front(list) ((void*)(list)->sentinel.next)
  244. #define enet_list_back(list) ((void*)(list)->sentinel.previous)
  245. // Cherry picked from nxrighthere repo, commit d9ad27e: "Avoid naming collision"
  246. #define enet_in6_equal(a, b) (memcmp(&a, &b, sizeof(struct in6_addr)) == 0)
  247. /*
  248. =======================================================================
  249. Protocol
  250. =======================================================================
  251. */
  252. enum {
  253. ENET_PROTOCOL_MINIMUM_MTU = 576,
  254. ENET_PROTOCOL_MAXIMUM_MTU = 4096,
  255. ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS = 32,
  256. ENET_PROTOCOL_MINIMUM_WINDOW_SIZE = 4096,
  257. ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE = 65536,
  258. ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT = 1,
  259. ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT = 255,
  260. ENET_PROTOCOL_MAXIMUM_PEER_ID = 0xFFF,
  261. ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT = 1024 * 1024
  262. };
  263. typedef enum _ENetProtocolCommand {
  264. ENET_PROTOCOL_COMMAND_NONE = 0,
  265. ENET_PROTOCOL_COMMAND_ACKNOWLEDGE = 1,
  266. ENET_PROTOCOL_COMMAND_CONNECT = 2,
  267. ENET_PROTOCOL_COMMAND_VERIFY_CONNECT = 3,
  268. ENET_PROTOCOL_COMMAND_DISCONNECT = 4,
  269. ENET_PROTOCOL_COMMAND_PING = 5,
  270. ENET_PROTOCOL_COMMAND_SEND_RELIABLE = 6,
  271. ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE = 7,
  272. ENET_PROTOCOL_COMMAND_SEND_FRAGMENT = 8,
  273. ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED = 9,
  274. ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT = 10,
  275. ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE = 11,
  276. ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT = 12,
  277. ENET_PROTOCOL_COMMAND_COUNT = 13,
  278. ENET_PROTOCOL_COMMAND_MASK = 0x0F
  279. } ENetProtocolCommand;
  280. typedef enum _ENetProtocolFlag {
  281. ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE = (1 << 7),
  282. ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED = (1 << 6),
  283. ENET_PROTOCOL_HEADER_FLAG_SENT_TIME = (1 << 14),
  284. ENET_PROTOCOL_HEADER_FLAG_COMPRESSED = (1 << 15),
  285. ENET_PROTOCOL_HEADER_FLAG_MASK = ENET_PROTOCOL_HEADER_FLAG_SENT_TIME | ENET_PROTOCOL_HEADER_FLAG_COMPRESSED,
  286. ENET_PROTOCOL_HEADER_SESSION_MASK = (3 << 12),
  287. ENET_PROTOCOL_HEADER_SESSION_SHIFT = 12
  288. } ENetProtocolFlag;
  289. #ifdef _MSC_VER
  290. #pragma pack(push, 1)
  291. #define ENET_PACKED
  292. #elif defined(__GNUC__) || defined(__clang__)
  293. #define ENET_PACKED __attribute__ ((packed))
  294. #else
  295. #define ENET_PACKED
  296. #endif
  297. typedef struct _ENetProtocolHeader {
  298. enet_uint16 peerID;
  299. enet_uint16 sentTime;
  300. } ENET_PACKED ENetProtocolHeader;
  301. typedef struct _ENetProtocolCommandHeader {
  302. enet_uint8 command;
  303. enet_uint8 channelID;
  304. enet_uint16 reliableSequenceNumber;
  305. } ENET_PACKED ENetProtocolCommandHeader;
  306. typedef struct _ENetProtocolAcknowledge {
  307. ENetProtocolCommandHeader header;
  308. enet_uint16 receivedReliableSequenceNumber;
  309. enet_uint16 receivedSentTime;
  310. } ENET_PACKED ENetProtocolAcknowledge;
  311. typedef struct _ENetProtocolConnect {
  312. ENetProtocolCommandHeader header;
  313. enet_uint16 outgoingPeerID;
  314. enet_uint8 incomingSessionID;
  315. enet_uint8 outgoingSessionID;
  316. enet_uint32 mtu;
  317. enet_uint32 windowSize;
  318. enet_uint32 channelCount;
  319. enet_uint32 incomingBandwidth;
  320. enet_uint32 outgoingBandwidth;
  321. enet_uint32 packetThrottleInterval;
  322. enet_uint32 packetThrottleAcceleration;
  323. enet_uint32 packetThrottleDeceleration;
  324. enet_uint32 connectID;
  325. enet_uint32 data;
  326. } ENET_PACKED ENetProtocolConnect;
  327. typedef struct _ENetProtocolVerifyConnect {
  328. ENetProtocolCommandHeader header;
  329. enet_uint16 outgoingPeerID;
  330. enet_uint8 incomingSessionID;
  331. enet_uint8 outgoingSessionID;
  332. enet_uint32 mtu;
  333. enet_uint32 windowSize;
  334. enet_uint32 channelCount;
  335. enet_uint32 incomingBandwidth;
  336. enet_uint32 outgoingBandwidth;
  337. enet_uint32 packetThrottleInterval;
  338. enet_uint32 packetThrottleAcceleration;
  339. enet_uint32 packetThrottleDeceleration;
  340. enet_uint32 connectID;
  341. } ENET_PACKED ENetProtocolVerifyConnect;
  342. typedef struct _ENetProtocolBandwidthLimit {
  343. ENetProtocolCommandHeader header;
  344. enet_uint32 incomingBandwidth;
  345. enet_uint32 outgoingBandwidth;
  346. } ENET_PACKED ENetProtocolBandwidthLimit;
  347. typedef struct _ENetProtocolThrottleConfigure {
  348. ENetProtocolCommandHeader header;
  349. enet_uint32 packetThrottleInterval;
  350. enet_uint32 packetThrottleAcceleration;
  351. enet_uint32 packetThrottleDeceleration;
  352. } ENET_PACKED ENetProtocolThrottleConfigure;
  353. typedef struct _ENetProtocolDisconnect {
  354. ENetProtocolCommandHeader header;
  355. enet_uint32 data;
  356. } ENET_PACKED ENetProtocolDisconnect;
  357. typedef struct _ENetProtocolPing {
  358. ENetProtocolCommandHeader header;
  359. } ENET_PACKED ENetProtocolPing;
  360. typedef struct _ENetProtocolSendReliable {
  361. ENetProtocolCommandHeader header;
  362. enet_uint16 dataLength;
  363. } ENET_PACKED ENetProtocolSendReliable;
  364. typedef struct _ENetProtocolSendUnreliable {
  365. ENetProtocolCommandHeader header;
  366. enet_uint16 unreliableSequenceNumber;
  367. enet_uint16 dataLength;
  368. } ENET_PACKED ENetProtocolSendUnreliable;
  369. typedef struct _ENetProtocolSendUnsequenced {
  370. ENetProtocolCommandHeader header;
  371. enet_uint16 unsequencedGroup;
  372. enet_uint16 dataLength;
  373. } ENET_PACKED ENetProtocolSendUnsequenced;
  374. typedef struct _ENetProtocolSendFragment {
  375. ENetProtocolCommandHeader header;
  376. enet_uint16 startSequenceNumber;
  377. enet_uint16 dataLength;
  378. enet_uint32 fragmentCount;
  379. enet_uint32 fragmentNumber;
  380. enet_uint32 totalLength;
  381. enet_uint32 fragmentOffset;
  382. } ENET_PACKED ENetProtocolSendFragment;
  383. typedef union _ENetProtocol {
  384. ENetProtocolCommandHeader header;
  385. ENetProtocolAcknowledge acknowledge;
  386. ENetProtocolConnect connect;
  387. ENetProtocolVerifyConnect verifyConnect;
  388. ENetProtocolDisconnect disconnect;
  389. ENetProtocolPing ping;
  390. ENetProtocolSendReliable sendReliable;
  391. ENetProtocolSendUnreliable sendUnreliable;
  392. ENetProtocolSendUnsequenced sendUnsequenced;
  393. ENetProtocolSendFragment sendFragment;
  394. ENetProtocolBandwidthLimit bandwidthLimit;
  395. ENetProtocolThrottleConfigure throttleConfigure;
  396. } ENET_PACKED ENetProtocol;
  397. #ifdef _MSC_VER
  398. #pragma pack(pop)
  399. #endif
  400. /*
  401. =======================================================================
  402. General structs/enums
  403. =======================================================================
  404. */
  405. typedef enum _ENetSocketType {
  406. ENET_SOCKET_TYPE_STREAM = 1,
  407. ENET_SOCKET_TYPE_DATAGRAM = 2
  408. } ENetSocketType;
  409. typedef enum _ENetSocketWait {
  410. ENET_SOCKET_WAIT_NONE = 0,
  411. ENET_SOCKET_WAIT_SEND = (1 << 0),
  412. ENET_SOCKET_WAIT_RECEIVE = (1 << 1),
  413. ENET_SOCKET_WAIT_INTERRUPT = (1 << 2)
  414. } ENetSocketWait;
  415. typedef enum _ENetSocketOption {
  416. ENET_SOCKOPT_NONBLOCK = 1,
  417. ENET_SOCKOPT_BROADCAST = 2,
  418. ENET_SOCKOPT_RCVBUF = 3,
  419. ENET_SOCKOPT_SNDBUF = 4,
  420. ENET_SOCKOPT_REUSEADDR = 5,
  421. ENET_SOCKOPT_RCVTIMEO = 6,
  422. ENET_SOCKOPT_SNDTIMEO = 7,
  423. ENET_SOCKOPT_ERROR = 8,
  424. ENET_SOCKOPT_NODELAY = 9,
  425. ENET_SOCKOPT_IPV6_V6ONLY = 10
  426. } ENetSocketOption;
  427. typedef enum _ENetSocketShutdown {
  428. ENET_SOCKET_SHUTDOWN_READ = 0,
  429. ENET_SOCKET_SHUTDOWN_WRITE = 1,
  430. ENET_SOCKET_SHUTDOWN_READ_WRITE = 2
  431. } ENetSocketShutdown;
  432. typedef struct _ENetAddress {
  433. union {
  434. struct in6_addr ipv6;
  435. struct {
  436. uint8_t zeros[10];
  437. uint16_t ffff;
  438. struct in_addr ip;
  439. } ipv4;
  440. };
  441. uint16_t port;
  442. } ENetAddress;
  443. typedef enum _ENetPacketFlag {
  444. ENET_PACKET_FLAG_NONE = 0,
  445. ENET_PACKET_FLAG_RELIABLE = (1 << 0),
  446. ENET_PACKET_FLAG_UNSEQUENCED = (1 << 1),
  447. ENET_PACKET_FLAG_NO_ALLOCATE = (1 << 2),
  448. ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED = (1 << 3),
  449. ENET_PACKET_FLAG_INSTANT = (1 << 4),
  450. ENET_PACKET_FLAG_SENT = (1 << 8)
  451. } ENetPacketFlag;
  452. typedef void (ENET_CALLBACK* ENetPacketFreeCallback)(void*);
  453. typedef struct _ENetPacket {
  454. enet_uint32 flags;
  455. enet_uint32 dataLength;
  456. enet_uint8* data;
  457. ENetPacketFreeCallback freeCallback;
  458. enet_uint32 referenceCount;
  459. } ENetPacket;
  460. typedef struct _ENetAcknowledgement {
  461. ENetListNode acknowledgementList;
  462. enet_uint32 sentTime;
  463. ENetProtocol command;
  464. } ENetAcknowledgement;
  465. typedef struct _ENetOutgoingCommand {
  466. ENetListNode outgoingCommandList;
  467. enet_uint16 reliableSequenceNumber;
  468. enet_uint16 unreliableSequenceNumber;
  469. enet_uint32 sentTime;
  470. enet_uint32 roundTripTimeout;
  471. enet_uint32 roundTripTimeoutLimit;
  472. enet_uint32 fragmentOffset;
  473. enet_uint16 fragmentLength;
  474. enet_uint16 sendAttempts;
  475. ENetProtocol command;
  476. ENetPacket* packet;
  477. } ENetOutgoingCommand;
  478. typedef struct _ENetIncomingCommand {
  479. ENetListNode incomingCommandList;
  480. enet_uint16 reliableSequenceNumber;
  481. enet_uint16 unreliableSequenceNumber;
  482. ENetProtocol command;
  483. enet_uint32 fragmentCount;
  484. enet_uint32 fragmentsRemaining;
  485. enet_uint32* fragments;
  486. ENetPacket* packet;
  487. } ENetIncomingCommand;
  488. typedef enum _ENetPeerState {
  489. ENET_PEER_STATE_DISCONNECTED = 0,
  490. ENET_PEER_STATE_CONNECTING = 1,
  491. ENET_PEER_STATE_ACKNOWLEDGING_CONNECT = 2,
  492. ENET_PEER_STATE_CONNECTION_PENDING = 3,
  493. ENET_PEER_STATE_CONNECTION_SUCCEEDED = 4,
  494. ENET_PEER_STATE_CONNECTED = 5,
  495. ENET_PEER_STATE_DISCONNECT_LATER = 6,
  496. ENET_PEER_STATE_DISCONNECTING = 7,
  497. ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT = 8,
  498. ENET_PEER_STATE_ZOMBIE = 9
  499. } ENetPeerState;
  500. enum {
  501. ENET_HOST_BUFFER_SIZE_MIN = 256 * 1024,
  502. ENET_HOST_BUFFER_SIZE_MAX = 1024 * 1024,
  503. ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL = 1000,
  504. ENET_HOST_DEFAULT_MTU = 1280,
  505. ENET_HOST_DEFAULT_MAXIMUM_PACKET_SIZE = 32 * 1024 * 1024,
  506. ENET_HOST_DEFAULT_MAXIMUM_WAITING_DATA = 32 * 1024 * 1024,
  507. ENET_PEER_DEFAULT_ROUND_TRIP_TIME = 500,
  508. ENET_PEER_DEFAULT_PACKET_THROTTLE = 32,
  509. ENET_PEER_PACKET_THROTTLE_THRESHOLD = 20,
  510. ENET_PEER_PACKET_THROTTLE_SCALE = 32,
  511. ENET_PEER_PACKET_THROTTLE_COUNTER = 7,
  512. ENET_PEER_PACKET_THROTTLE_ACCELERATION = 2,
  513. ENET_PEER_PACKET_THROTTLE_DECELERATION = 2,
  514. ENET_PEER_PACKET_THROTTLE_INTERVAL = 5000,
  515. ENET_PEER_PACKET_LOSS_SCALE = (1 << 16),
  516. ENET_PEER_PACKET_LOSS_INTERVAL = 10000,
  517. ENET_PEER_WINDOW_SIZE_SCALE = 64 * 1024,
  518. ENET_PEER_TIMEOUT_LIMIT = 32,
  519. ENET_PEER_TIMEOUT_MINIMUM = 5000,
  520. ENET_PEER_TIMEOUT_MAXIMUM = 30000,
  521. ENET_PEER_PING_INTERVAL = 500,
  522. ENET_PEER_UNSEQUENCED_WINDOWS = 64,
  523. ENET_PEER_UNSEQUENCED_WINDOW_SIZE = 1024,
  524. ENET_PEER_FREE_UNSEQUENCED_WINDOWS = 32,
  525. ENET_PEER_RELIABLE_WINDOWS = 16,
  526. ENET_PEER_RELIABLE_WINDOW_SIZE = 0x1000,
  527. ENET_PEER_FREE_RELIABLE_WINDOWS = 8
  528. };
  529. typedef struct _ENetChannel {
  530. enet_uint16 outgoingReliableSequenceNumber;
  531. enet_uint16 outgoingUnreliableSequenceNumber;
  532. enet_uint16 usedReliableWindows;
  533. enet_uint16 reliableWindows[ENET_PEER_RELIABLE_WINDOWS];
  534. enet_uint16 incomingReliableSequenceNumber;
  535. enet_uint16 incomingUnreliableSequenceNumber;
  536. ENetList incomingReliableCommands;
  537. ENetList incomingUnreliableCommands;
  538. } ENetChannel;
  539. typedef struct _ENetPeer {
  540. ENetListNode dispatchList;
  541. struct _ENetHost* host;
  542. enet_uint16 outgoingPeerID;
  543. enet_uint16 incomingPeerID;
  544. enet_uint32 connectID;
  545. enet_uint8 outgoingSessionID;
  546. enet_uint8 incomingSessionID;
  547. ENetAddress address;
  548. void* data;
  549. ENetPeerState state;
  550. ENetChannel* channels;
  551. size_t channelCount;
  552. enet_uint32 incomingBandwidth;
  553. enet_uint32 outgoingBandwidth;
  554. enet_uint32 incomingBandwidthThrottleEpoch;
  555. enet_uint32 outgoingBandwidthThrottleEpoch;
  556. enet_uint32 incomingDataTotal;
  557. enet_uint64 totalDataReceived;
  558. enet_uint32 outgoingDataTotal;
  559. enet_uint64 totalDataSent;
  560. enet_uint32 lastSendTime;
  561. enet_uint32 lastReceiveTime;
  562. enet_uint32 nextTimeout;
  563. enet_uint32 earliestTimeout;
  564. enet_uint32 packetLossEpoch;
  565. enet_uint32 packetsSent;
  566. enet_uint64 totalPacketsSent;
  567. enet_uint32 packetsLost;
  568. enet_uint64 totalPacketsLost;
  569. enet_uint32 packetLoss;
  570. enet_uint32 packetLossVariance;
  571. enet_uint32 packetThrottle;
  572. enet_uint32 packetThrottleThreshold;
  573. enet_uint32 packetThrottleLimit;
  574. enet_uint32 packetThrottleCounter;
  575. enet_uint32 packetThrottleEpoch;
  576. enet_uint32 packetThrottleAcceleration;
  577. enet_uint32 packetThrottleDeceleration;
  578. enet_uint32 packetThrottleInterval;
  579. enet_uint32 pingInterval;
  580. enet_uint32 timeoutLimit;
  581. enet_uint32 timeoutMinimum;
  582. enet_uint32 timeoutMaximum;
  583. enet_uint32 smoothedRoundTripTime;
  584. enet_uint32 lastRoundTripTime;
  585. enet_uint32 lowestRoundTripTime;
  586. enet_uint32 lastRoundTripTimeVariance;
  587. enet_uint32 highestRoundTripTimeVariance;
  588. enet_uint32 roundTripTime;
  589. enet_uint32 roundTripTimeVariance;
  590. enet_uint32 mtu;
  591. enet_uint32 windowSize;
  592. enet_uint32 reliableDataInTransit;
  593. enet_uint16 outgoingReliableSequenceNumber;
  594. ENetList acknowledgements;
  595. ENetList sentReliableCommands;
  596. ENetList sentUnreliableCommands;
  597. ENetList outgoingReliableCommands;
  598. ENetList outgoingUnreliableCommands;
  599. ENetList dispatchedCommands;
  600. int needsDispatch;
  601. enet_uint16 incomingUnsequencedGroup;
  602. enet_uint16 outgoingUnsequencedGroup;
  603. enet_uint32 unsequencedWindow[ENET_PEER_UNSEQUENCED_WINDOW_SIZE / 32];
  604. enet_uint32 eventData;
  605. size_t totalWaitingData;
  606. } ENetPeer;
  607. typedef enet_uint32(ENET_CALLBACK* ENetChecksumCallback)(const ENetBuffer* buffers, size_t bufferCount);
  608. typedef int (ENET_CALLBACK* ENetInterceptCallback)(struct _ENetHost* host, void* event);
  609. typedef struct _ENetHost {
  610. ENetSocket socket;
  611. ENetAddress address;
  612. enet_uint32 incomingBandwidth;
  613. enet_uint32 outgoingBandwidth;
  614. enet_uint32 bandwidthThrottleEpoch;
  615. enet_uint32 mtu;
  616. enet_uint32 randomSeed;
  617. int recalculateBandwidthLimits;
  618. enet_uint8 preventConnections;
  619. ENetPeer* peers;
  620. size_t peerCount;
  621. size_t channelLimit;
  622. enet_uint32 serviceTime;
  623. ENetList dispatchQueue;
  624. int continueSending;
  625. size_t packetSize;
  626. enet_uint16 headerFlags;
  627. enet_uint32 totalSentData;
  628. enet_uint32 totalSentPackets;
  629. enet_uint32 totalReceivedData;
  630. enet_uint32 totalReceivedPackets;
  631. ENetProtocol commands[ENET_PROTOCOL_MAXIMUM_PACKET_COMMANDS];
  632. size_t commandCount;
  633. ENetBuffer buffers[ENET_BUFFER_MAXIMUM];
  634. size_t bufferCount;
  635. enet_uint8 compression;
  636. char* compressionBuffer;
  637. size_t compressionBufferSize;
  638. ENetChecksumCallback checksumCallback;
  639. enet_uint8 packetData[2][ENET_PROTOCOL_MAXIMUM_MTU];
  640. ENetAddress receivedAddress;
  641. enet_uint8* receivedData;
  642. size_t receivedDataLength;
  643. ENetInterceptCallback interceptCallback;
  644. size_t connectedPeers;
  645. size_t bandwidthLimitedPeers;
  646. size_t duplicatePeers;
  647. size_t maximumPacketSize;
  648. size_t maximumWaitingData;
  649. } ENetHost;
  650. typedef enum _ENetEventType {
  651. ENET_EVENT_TYPE_NONE = 0,
  652. ENET_EVENT_TYPE_CONNECT = 1,
  653. ENET_EVENT_TYPE_DISCONNECT = 2,
  654. ENET_EVENT_TYPE_RECEIVE = 3,
  655. ENET_EVENT_TYPE_DISCONNECT_TIMEOUT = 4
  656. } ENetEventType;
  657. typedef struct _ENetEvent {
  658. ENetEventType type;
  659. ENetPeer* peer;
  660. enet_uint8 channelID;
  661. enet_uint32 data;
  662. ENetPacket* packet;
  663. } ENetEvent;
  664. /*
  665. =======================================================================
  666. Public API
  667. =======================================================================
  668. */
  669. ENET_API int enet_initialize(void);
  670. ENET_API int enet_initialize_with_callbacks(ENetVersion, const ENetCallbacks*);
  671. ENET_API void enet_deinitialize(void);
  672. ENET_API ENetVersion enet_linked_version(void);
  673. ENET_API int enet_array_is_zeroed(const uint8_t*, int);
  674. ENET_API size_t enet_string_copy(char*, const char*, size_t);
  675. ENET_API enet_uint32 enet_time_get(void);
  676. ENET_API enet_uint32 enet_crc32(const ENetBuffer*, size_t);
  677. ENET_API ENetPacket* enet_packet_create(const void*, size_t, enet_uint32);
  678. ENET_API ENetPacket* enet_packet_create_offset(const void*, size_t, size_t, enet_uint32);
  679. ENET_API void enet_packet_destroy(ENetPacket*);
  680. ENET_API int enet_peer_send(ENetPeer*, enet_uint8, ENetPacket*);
  681. ENET_API ENetPacket* enet_peer_receive(ENetPeer*, enet_uint8*);
  682. ENET_API void enet_peer_ping(ENetPeer*);
  683. ENET_API void enet_peer_ping_interval(ENetPeer*, enet_uint32);
  684. ENET_API void enet_peer_timeout(ENetPeer*, enet_uint32, enet_uint32, enet_uint32);
  685. ENET_API void enet_peer_reset(ENetPeer*);
  686. ENET_API void enet_peer_disconnect(ENetPeer*, enet_uint32);
  687. ENET_API void enet_peer_disconnect_now(ENetPeer*, enet_uint32);
  688. ENET_API void enet_peer_disconnect_later(ENetPeer*, enet_uint32);
  689. ENET_API void enet_peer_throttle_configure(ENetPeer*, enet_uint32, enet_uint32, enet_uint32, enet_uint32);
  690. ENET_API ENetHost* enet_host_create(const ENetAddress*, size_t, size_t, enet_uint32, enet_uint32, int);
  691. ENET_API void enet_host_destroy(ENetHost*);
  692. ENET_API void enet_host_enable_compression(ENetHost*);
  693. ENET_API void enet_host_prevent_connections(ENetHost*, enet_uint8);
  694. ENET_API ENetPeer* enet_host_connect(ENetHost*, const ENetAddress*, size_t, enet_uint32);
  695. ENET_API int enet_host_check_events(ENetHost*, ENetEvent*);
  696. ENET_API int enet_host_service(ENetHost*, ENetEvent*, enet_uint32);
  697. ENET_API void enet_host_flush(ENetHost*);
  698. ENET_API void enet_host_broadcast(ENetHost*, enet_uint8, ENetPacket*);
  699. ENET_API void enet_host_broadcast_exclude(ENetHost*, enet_uint8, ENetPacket*, ENetPeer*);
  700. ENET_API void enet_host_broadcast_selective(ENetHost*, enet_uint8, ENetPacket*, ENetPeer**, size_t);
  701. ENET_API void enet_host_channel_limit(ENetHost*, size_t);
  702. ENET_API void enet_host_bandwidth_limit(ENetHost*, enet_uint32, enet_uint32);
  703. ENET_API int enet_address_set_host_ip(ENetAddress*, const char*);
  704. ENET_API int enet_address_set_host(ENetAddress*, const char*);
  705. ENET_API int enet_address_get_host_ip(const ENetAddress*, char*, size_t);
  706. ENET_API int enet_address_get_host(const ENetAddress*, char*, size_t);
  707. ENET_API ENetSocket enet_socket_create(ENetSocketType);
  708. ENET_API int enet_socket_bind(ENetSocket, const ENetAddress*);
  709. ENET_API int enet_socket_get_address(ENetSocket, ENetAddress*);
  710. ENET_API int enet_socket_listen(ENetSocket, int);
  711. ENET_API ENetSocket enet_socket_accept(ENetSocket, ENetAddress*);
  712. ENET_API int enet_socket_connect(ENetSocket, const ENetAddress*);
  713. ENET_API int enet_socket_send(ENetSocket, const ENetAddress*, const ENetBuffer*, size_t);
  714. ENET_API int enet_socket_receive(ENetSocket, ENetAddress*, ENetBuffer*, size_t);
  715. ENET_API int enet_socket_wait(ENetSocket, enet_uint32*, enet_uint64);
  716. ENET_API int enet_socket_set_option(ENetSocket, ENetSocketOption, int);
  717. ENET_API int enet_socket_get_option(ENetSocket, ENetSocketOption, int*);
  718. ENET_API int enet_socket_shutdown(ENetSocket, ENetSocketShutdown);
  719. ENET_API void enet_socket_destroy(ENetSocket);
  720. ENET_API int enet_socket_set_select(ENetSocket, ENetSocketSet*, ENetSocketSet*, enet_uint32);
  721. /* Extended API for easier binding in other programming languages */
  722. ENET_API void* enet_packet_get_data(const ENetPacket*);
  723. ENET_API int enet_packet_get_length(const ENetPacket*);
  724. ENET_API void enet_packet_set_free_callback(ENetPacket*, const void*);
  725. ENET_API int enet_packet_check_references(const ENetPacket*);
  726. ENET_API void enet_packet_dispose(ENetPacket*);
  727. ENET_API enet_uint32 enet_host_get_peers_count(const ENetHost*);
  728. ENET_API enet_uint32 enet_host_get_packets_sent(const ENetHost*);
  729. ENET_API enet_uint32 enet_host_get_packets_received(const ENetHost*);
  730. ENET_API enet_uint32 enet_host_get_bytes_sent(const ENetHost*);
  731. ENET_API enet_uint32 enet_host_get_bytes_received(const ENetHost*);
  732. ENET_API enet_uint32 enet_peer_get_id(const ENetPeer*);
  733. ENET_API int enet_peer_get_ip(const ENetPeer*, char*, size_t);
  734. ENET_API enet_uint16 enet_peer_get_port(const ENetPeer*);
  735. ENET_API enet_uint32 enet_peer_get_mtu(const ENetPeer*);
  736. ENET_API ENetPeerState enet_peer_get_state(const ENetPeer*);
  737. ENET_API enet_uint32 enet_peer_get_rtt(const ENetPeer*);
  738. ENET_API enet_uint32 enet_peer_get_lastsendtime(const ENetPeer*);
  739. ENET_API enet_uint32 enet_peer_get_lastreceivetime(const ENetPeer*);
  740. ENET_API enet_uint64 enet_peer_get_packets_sent(const ENetPeer*);
  741. ENET_API enet_uint64 enet_peer_get_packets_lost(const ENetPeer*);
  742. ENET_API enet_uint64 enet_peer_get_bytes_sent(const ENetPeer*);
  743. ENET_API enet_uint64 enet_peer_get_bytes_received(const ENetPeer*);
  744. ENET_API void* enet_peer_get_data(const ENetPeer*);
  745. ENET_API void enet_peer_set_data(ENetPeer*, const void*);
  746. /*
  747. =======================================================================
  748. Private API
  749. =======================================================================
  750. */
  751. extern void enet_host_bandwidth_throttle(ENetHost*);
  752. extern enet_uint64 enet_host_random_seed(void);
  753. extern int enet_peer_throttle(ENetPeer*, enet_uint32);
  754. extern void enet_peer_reset_queues(ENetPeer*);
  755. extern void enet_peer_setup_outgoing_command(ENetPeer*, ENetOutgoingCommand*);
  756. extern ENetOutgoingCommand* enet_peer_queue_outgoing_command(ENetPeer*, const ENetProtocol*, ENetPacket*, enet_uint32, enet_uint16);
  757. extern ENetIncomingCommand* enet_peer_queue_incoming_command(ENetPeer*, const ENetProtocol*, const void*, size_t, enet_uint32, enet_uint32);
  758. extern ENetAcknowledgement* enet_peer_queue_acknowledgement(ENetPeer*, const ENetProtocol*, enet_uint16);
  759. extern void enet_peer_dispatch_incoming_unreliable_commands(ENetPeer*, ENetChannel*);
  760. extern void enet_peer_dispatch_incoming_reliable_commands(ENetPeer*, ENetChannel*);
  761. extern void enet_peer_on_connect(ENetPeer*);
  762. extern void enet_peer_on_disconnect(ENetPeer*);
  763. extern size_t enet_protocol_command_size(enet_uint8);
  764. #ifdef __cplusplus
  765. }
  766. #endif
  767. #if defined(ENET_IMPLEMENTATION) && !defined(ENET_IMPLEMENTATION_DONE)
  768. #define ENET_IMPLEMENTATION_DONE 1
  769. #ifdef __cplusplus
  770. extern "C" {
  771. #endif
  772. #ifdef __MINGW32__
  773. #include "mingw/inet_ntop.c"
  774. #include "mingw/inet_pton.c"
  775. #endif
  776. /*
  777. =======================================================================
  778. Atomics
  779. =======================================================================
  780. */
  781. #ifdef _MSC_VER
  782. #define ENET_AT_CASSERT_PRED(predicate) sizeof(char[2 * !!(predicate) - 1])
  783. #define ENET_IS_SUPPORTED_ATOMIC(size) ENET_AT_CASSERT_PRED(size == 1 || size == 2 || size == 4 || size == 8)
  784. #define ENET_ATOMIC_SIZEOF(variable) (ENET_IS_SUPPORTED_ATOMIC(sizeof(*(variable))), sizeof(*(variable)))
  785. __inline int64_t enet_at_atomic_read(char* ptr, size_t size) {
  786. switch (size) {
  787. case 1:
  788. return _InterlockedExchangeAdd8((volatile char*)ptr, 0);
  789. case 2:
  790. return _InterlockedExchangeAdd16((volatile SHORT*)ptr, 0);
  791. case 4:
  792. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  793. return InterlockedExchangeAdd((volatile LONG*)ptr, 0);
  794. #else
  795. return _InterlockedExchangeAdd((volatile LONG*)ptr, 0);
  796. #endif
  797. case 8:
  798. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  799. return InterlockedExchangeAdd64((volatile LONGLONG*)ptr, 0);
  800. #else
  801. return _InterlockedExchangeAdd64((volatile LONGLONG*)ptr, 0);
  802. #endif
  803. default:
  804. return 0x0;
  805. }
  806. }
  807. __inline int64_t enet_at_atomic_write(char* ptr, int64_t value, size_t size) {
  808. switch (size) {
  809. case 1:
  810. return _InterlockedExchange8((volatile char*)ptr, (char)value);
  811. case 2:
  812. return _InterlockedExchange16((volatile SHORT*)ptr, (SHORT)value);
  813. case 4:
  814. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  815. return InterlockedExchange((volatile LONG*)ptr, (LONG)value);
  816. #else
  817. return _InterlockedExchange((volatile LONG*)ptr, (LONG)value);
  818. #endif
  819. case 8:
  820. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  821. return InterlockedExchange64((volatile LONGLONG*)ptr, (LONGLONG)value);
  822. #else
  823. return _InterlockedExchange64((volatile LONGLONG*)ptr, (LONGLONG)value);
  824. #endif
  825. default:
  826. return 0x0;
  827. }
  828. }
  829. __inline int64_t enet_at_atomic_cas(char* ptr, int64_t new_val, int64_t old_val, size_t size) {
  830. switch (size) {
  831. case 1:
  832. return _InterlockedCompareExchange8((volatile char*)ptr, (char)new_val, (char)old_val);
  833. case 2:
  834. return _InterlockedCompareExchange16((volatile SHORT*)ptr, (SHORT)new_val, (SHORT)old_val);
  835. case 4:
  836. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  837. return InterlockedCompareExchange((volatile LONG*)ptr, (LONG)new_val, (LONG)old_val);
  838. #else
  839. return _InterlockedCompareExchange((volatile LONG*)ptr, (LONG)new_val, (LONG)old_val);
  840. #endif
  841. case 8:
  842. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  843. return InterlockedCompareExchange64((volatile LONGLONG*)ptr, (LONGLONG)new_val, (LONGLONG)old_val);
  844. #else
  845. return _InterlockedCompareExchange64((volatile LONGLONG*)ptr, (LONGLONG)new_val, (LONGLONG)old_val);
  846. #endif
  847. default:
  848. return 0x0;
  849. }
  850. }
  851. __inline int64_t enet_at_atomic_inc(char* ptr, int64_t delta, size_t data_size) {
  852. switch (data_size) {
  853. case 1:
  854. return _InterlockedExchangeAdd8((volatile char*)ptr, (char)delta);
  855. case 2:
  856. return _InterlockedExchangeAdd16((volatile SHORT*)ptr, (SHORT)delta);
  857. case 4:
  858. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  859. return InterlockedExchangeAdd((volatile LONG*)ptr, (LONG)delta);
  860. #else
  861. return _InterlockedExchangeAdd((volatile LONG*)ptr, (LONG)delta);
  862. #endif
  863. case 8:
  864. #ifdef NOT_UNDERSCORED_INTERLOCKED_EXCHANGE
  865. return InterlockedExchangeAdd64((volatile LONGLONG*)ptr, (LONGLONG)delta);
  866. #else
  867. return _InterlockedExchangeAdd64((volatile LONGLONG*)ptr, (LONGLONG)delta);
  868. #endif
  869. default:
  870. return 0x0;
  871. }
  872. }
  873. #define ENET_ATOMIC_READ(variable) enet_at_atomic_read((char*)(variable), ENET_ATOMIC_SIZEOF(variable))
  874. #define ENET_ATOMIC_WRITE(variable, new_val) enet_at_atomic_write((char*)(variable), (int64_t)(new_val), ENET_ATOMIC_SIZEOF(variable))
  875. #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))
  876. #define ENET_ATOMIC_INC(variable) enet_at_atomic_inc((char*)(variable), 1, ENET_ATOMIC_SIZEOF(variable))
  877. #define ENET_ATOMIC_DEC(variable) enet_at_atomic_inc((char*)(variable), -1, ENET_ATOMIC_SIZEOF(variable))
  878. #define ENET_ATOMIC_INC_BY(variable, delta) enet_at_atomic_inc((char*)(variable), (delta), ENET_ATOMIC_SIZEOF(variable))
  879. #define ENET_ATOMIC_DEC_BY(variable, delta) enet_at_atomic_inc((char*)(variable), -(delta), ENET_ATOMIC_SIZEOF(variable))
  880. #elif defined(__GNUC__) || defined(__clang__)
  881. #if defined(__clang__) || (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
  882. #define AT_HAVE_ATOMICS
  883. #endif
  884. /* We want to use __atomic built-ins if possible because the __sync primitives are
  885. deprecated, because the __atomic build-ins allow us to use ENET_ATOMIC_WRITE on
  886. uninitialized memory without running into undefined behavior, and because the
  887. __atomic versions generate more efficient code since we don't need to rely on
  888. CAS when we don't actually want it.
  889. Note that we use acquire-release memory order (like mutexes do). We could use
  890. sequentially consistent memory order but that has lower performance and is
  891. almost always unneeded. */
  892. #ifdef AT_HAVE_ATOMICS
  893. #define ENET_ATOMIC_READ(ptr) __atomic_load_n((ptr), __ATOMIC_ACQUIRE)
  894. #define ENET_ATOMIC_WRITE(ptr, value) __atomic_store_n((ptr), (value), __ATOMIC_RELEASE)
  895. #ifndef typeof
  896. #define typeof __typeof__
  897. #endif
  898. /* clang_analyzer doesn't know that CAS writes to memory so it complains about
  899. potentially lost data. Replace the code with the equivalent non-sync code. */
  900. #ifdef __clang_analyzer__
  901. #define ENET_ATOMIC_CAS(ptr, old_value, new_value) \
  902. ({ \
  903. typeof(*(ptr)) ENET_ATOMIC_CAS_old_actual_ = (*(ptr)); \
  904. if (ATOMIC_CAS_old_actual_ == (old_value)) \
  905. *(ptr) = new_value; \
  906. ENET_ATOMIC_CAS_old_actual_; \
  907. })
  908. #else
  909. /* Could use __auto_type instead of typeof but that shouldn't work in C++.
  910. The ({ }) syntax is a GCC extension called statement expression. It lets
  911. us return a value out of the macro.
  912. TODO We should return bool here instead of the old value to avoid the ABA
  913. problem. */
  914. #define ENET_ATOMIC_CAS(ptr, old_value, new_value) \
  915. ({ \
  916. typeof(*(ptr)) ENET_ATOMIC_CAS_expected_ = (old_value); \
  917. __atomic_compare_exchange_n((ptr), &ENET_ATOMIC_CAS_expected_, (new_value), false, \
  918. __ATOMIC_ACQ_REL, __ATOMIC_ACQUIRE); \
  919. ENET_ATOMIC_CAS_expected_; \
  920. })
  921. #endif
  922. #define ENET_ATOMIC_INC(ptr) __atomic_fetch_add((ptr), 1, __ATOMIC_ACQ_REL)
  923. #define ENET_ATOMIC_DEC(ptr) __atomic_fetch_sub((ptr), 1, __ATOMIC_ACQ_REL)
  924. #define ENET_ATOMIC_INC_BY(ptr, delta) __atomic_fetch_add((ptr), (delta), __ATOMIC_ACQ_REL)
  925. #define ENET_ATOMIC_DEC_BY(ptr, delta) __atomic_fetch_sub((ptr), (delta), __ATOMIC_ACQ_REL)
  926. #else
  927. #define ENET_ATOMIC_READ(variable) __sync_fetch_and_add(variable, 0)
  928. #define ENET_ATOMIC_WRITE(variable, new_val) (void)__sync_val_compare_and_swap((variable), *(variable), (new_val))
  929. #define ENET_ATOMIC_CAS(variable, old_value, new_val) __sync_val_compare_and_swap((variable), (old_value), (new_val))
  930. #define ENET_ATOMIC_INC(variable) __sync_fetch_and_add((variable), 1)
  931. #define ENET_ATOMIC_DEC(variable) __sync_fetch_and_sub((variable), 1)
  932. #define ENET_ATOMIC_INC_BY(variable, delta) __sync_fetch_and_add((variable), (delta), 1)
  933. #define ENET_ATOMIC_DEC_BY(variable, delta) __sync_fetch_and_sub((variable), (delta), 1)
  934. #endif
  935. #undef AT_HAVE_ATOMICS
  936. #endif
  937. /*
  938. =======================================================================
  939. Callbacks
  940. =======================================================================
  941. */
  942. static ENetCallbacks callbacks = {
  943. malloc,
  944. free,
  945. abort
  946. };
  947. int enet_initialize_with_callbacks(ENetVersion version, const ENetCallbacks* inits) {
  948. if (version < ENET_VERSION_CREATE(1, 3, 0))
  949. {
  950. ENET_LOG_ERROR("ENET version is too old");
  951. return ENET_LIBRARY_TOO_OLD;
  952. }
  953. if (inits->malloc != NULL || inits->free != NULL) {
  954. if (inits->malloc == NULL || inits->free == NULL) {
  955. ENET_LOG_ERROR("memory allocator or free thingy is NULL");
  956. return ENET_LIBRARY_MEMALLOC_NULL;
  957. }
  958. callbacks.malloc = inits->malloc;
  959. callbacks.free = inits->free;
  960. }
  961. if (inits->noMemory != NULL)
  962. callbacks.noMemory = inits->noMemory;
  963. return enet_initialize();
  964. }
  965. void* enet_malloc(size_t size) {
  966. void* memory = callbacks.malloc(size);
  967. if (memory == NULL)
  968. callbacks.noMemory();
  969. return memory;
  970. }
  971. void enet_free(void* memory) {
  972. callbacks.free(memory);
  973. }
  974. /*
  975. =======================================================================
  976. List
  977. =======================================================================
  978. */
  979. void enet_list_clear(ENetList* list) {
  980. list->sentinel.next = &list->sentinel;
  981. list->sentinel.previous = &list->sentinel;
  982. }
  983. ENetListIterator enet_list_insert(ENetListIterator position, void* data) {
  984. ENetListIterator result = (ENetListIterator)data;
  985. result->previous = position->previous;
  986. result->next = position;
  987. result->previous->next = result;
  988. position->previous = result;
  989. return result;
  990. }
  991. void* enet_list_remove(ENetListIterator position) {
  992. position->previous->next = position->next;
  993. position->next->previous = position->previous;
  994. return position;
  995. }
  996. ENetListIterator enet_list_move(ENetListIterator position, void* dataFirst, void* dataLast) {
  997. ENetListIterator first = (ENetListIterator)dataFirst;
  998. ENetListIterator last = (ENetListIterator)dataLast;
  999. first->previous->next = last->next;
  1000. last->next->previous = first->previous;
  1001. first->previous = position->previous;
  1002. last->next = position;
  1003. first->previous->next = first;
  1004. position->previous = last;
  1005. return first;
  1006. }
  1007. size_t enet_list_size(ENetList* list) {
  1008. size_t size = 0;
  1009. ENetListIterator position;
  1010. for (position = enet_list_begin(list); position != enet_list_end(list); position = enet_list_next(position)) {
  1011. ++size;
  1012. }
  1013. return size;
  1014. }
  1015. /*
  1016. =======================================================================
  1017. Utilities
  1018. =======================================================================
  1019. */
  1020. ENetVersion enet_linked_version(void) {
  1021. return ENET_VERSION;
  1022. }
  1023. int enet_array_is_zeroed(const uint8_t* array, int length) {
  1024. size_t i;
  1025. for (i = 0; i < length; i++) {
  1026. if (array[i] != 0)
  1027. return -1;
  1028. }
  1029. return 0;
  1030. }
  1031. size_t enet_string_copy(char* destination, const char* source, size_t length) {
  1032. char* d = destination;
  1033. const char* s = source;
  1034. size_t n = length;
  1035. if (n != 0 && --n != 0) {
  1036. do {
  1037. if ((*d++ = *s++) == 0)
  1038. break;
  1039. }
  1040. while (--n != 0);
  1041. }
  1042. if (n == 0) {
  1043. if (length != 0)
  1044. *d = '\0';
  1045. while (*s++);
  1046. }
  1047. return (s - source - 1);
  1048. }
  1049. /*
  1050. =======================================================================
  1051. Time
  1052. =======================================================================
  1053. */
  1054. #ifdef _WIN32
  1055. static LARGE_INTEGER gettime_offset(void) {
  1056. SYSTEMTIME s;
  1057. FILETIME f;
  1058. LARGE_INTEGER t;
  1059. s.wYear = 1970;
  1060. s.wMonth = 1;
  1061. s.wDay = 1;
  1062. s.wHour = 0;
  1063. s.wMinute = 0;
  1064. s.wSecond = 0;
  1065. s.wMilliseconds = 0;
  1066. SystemTimeToFileTime(&s, &f);
  1067. t.QuadPart = f.dwHighDateTime;
  1068. t.QuadPart <<= 32;
  1069. t.QuadPart |= f.dwLowDateTime;
  1070. return t;
  1071. }
  1072. int clock_gettime(int X, struct timespec* tv) {
  1073. LARGE_INTEGER t;
  1074. FILETIME f;
  1075. double microseconds;
  1076. static LARGE_INTEGER offset;
  1077. static double frequencyToMicroseconds;
  1078. static int initialized = 0;
  1079. static BOOL usePerformanceCounter = 0;
  1080. if (!initialized) {
  1081. LARGE_INTEGER performanceFrequency;
  1082. initialized = 1;
  1083. usePerformanceCounter = QueryPerformanceFrequency(&performanceFrequency);
  1084. if (usePerformanceCounter) {
  1085. QueryPerformanceCounter(&offset);
  1086. frequencyToMicroseconds = (double)performanceFrequency.QuadPart / 1000000.;
  1087. }
  1088. else {
  1089. offset = gettime_offset();
  1090. frequencyToMicroseconds = 10.;
  1091. }
  1092. }
  1093. if (usePerformanceCounter) {
  1094. QueryPerformanceCounter(&t);
  1095. }
  1096. else {
  1097. GetSystemTimeAsFileTime(&f);
  1098. t.QuadPart = f.dwHighDateTime;
  1099. t.QuadPart <<= 32;
  1100. t.QuadPart |= f.dwLowDateTime;
  1101. }
  1102. t.QuadPart -= offset.QuadPart;
  1103. microseconds = (double)t.QuadPart / frequencyToMicroseconds;
  1104. t.QuadPart = (LONGLONG)microseconds;
  1105. tv->tv_sec = (long)(t.QuadPart / 1000000);
  1106. tv->tv_nsec = t.QuadPart % 1000000 * 1000;
  1107. return 0;
  1108. }
  1109. // Coburn: this fixes devices on iOS <10.0 from causing a E_ARM_BREAKPOINT and making XCode Debugger angery
  1110. #elif __APPLE__ && (__MAC_OS_X_VERSION_MIN_REQUIRED < 101200 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000) && !defined(CLOCK_MONOTONIC)
  1111. #define CLOCK_MONOTONIC 0
  1112. int clock_gettime(int X, struct timespec* ts) {
  1113. clock_serv_t cclock;
  1114. mach_timespec_t mts;
  1115. host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
  1116. clock_get_time(cclock, &mts);
  1117. mach_port_deallocate(mach_task_self(), cclock);
  1118. ts->tv_sec = mts.tv_sec;
  1119. ts->tv_nsec = mts.tv_nsec;
  1120. return 0;
  1121. }
  1122. #endif
  1123. enet_uint32 enet_time_get(void) {
  1124. static enet_uint64 start_time_ns = 0;
  1125. struct timespec ts;
  1126. // c6: what the [redacted] fuck is clock_monotonic_raw??????
  1127. // c6: just use clock monotonic
  1128. // Coburn: sir yes sir
  1129. clock_gettime(CLOCK_MONOTONIC, &ts);
  1130. static const enet_uint64 ns_in_s = 1000 * 1000 * 1000;
  1131. static const enet_uint64 ns_in_ms = 1000 * 1000;
  1132. enet_uint64 current_time_ns = ts.tv_nsec + (enet_uint64)ts.tv_sec * ns_in_s;
  1133. enet_uint64 offset_ns = ENET_ATOMIC_READ(&start_time_ns);
  1134. if (offset_ns == 0) {
  1135. enet_uint64 want_value = current_time_ns - 1 * ns_in_ms;
  1136. enet_uint64 old_value = ENET_ATOMIC_CAS(&start_time_ns, 0, want_value);
  1137. offset_ns = old_value == 0 ? want_value : old_value;
  1138. }
  1139. enet_uint64 result_in_ns = current_time_ns - offset_ns;
  1140. return (enet_uint32)(result_in_ns / ns_in_ms);
  1141. }
  1142. /*
  1143. =======================================================================
  1144. Checksum
  1145. =======================================================================
  1146. */
  1147. static int initializedCRC32 = 0;
  1148. static enet_uint32 crcTable[256];
  1149. static enet_uint32 reflect_crc(int val, int bits) {
  1150. int result = 0, bit;
  1151. for (bit = 0; bit < bits; bit++) {
  1152. if (val & 1)
  1153. result |= 1 << (bits - 1 - bit);
  1154. val >>= 1;
  1155. }
  1156. return result;
  1157. }
  1158. static void initialize_crc32(void) {
  1159. int byte;
  1160. for (byte = 0; byte < 256; ++byte) {
  1161. enet_uint32 crc = reflect_crc(byte, 8) << 24;
  1162. int offset;
  1163. for (offset = 0; offset < 8; ++offset) {
  1164. if (crc & 0x80000000)
  1165. crc = (crc << 1) ^ 0x04c11db7;
  1166. else
  1167. crc <<= 1;
  1168. }
  1169. crcTable[byte] = reflect_crc(crc, 32);
  1170. }
  1171. initializedCRC32 = 1;
  1172. }
  1173. enet_uint32 enet_crc32(const ENetBuffer* buffers, size_t bufferCount) {
  1174. enet_uint32 crc = 0xFFFFFFFF;
  1175. if (!initializedCRC32)
  1176. initialize_crc32();
  1177. while (bufferCount-- > 0) {
  1178. const enet_uint8* data = (const enet_uint8*)buffers->data;
  1179. const enet_uint8* dataEnd = &data[buffers->dataLength];
  1180. while (data < dataEnd) {
  1181. crc = (crc >> 8) ^ crcTable[(crc & 0xFF) ^ *data++];
  1182. }
  1183. ++buffers;
  1184. }
  1185. return ENET_HOST_TO_NET_32(~crc);
  1186. }
  1187. /*
  1188. =======================================================================
  1189. Packet
  1190. =======================================================================
  1191. */
  1192. ENetPacket* enet_packet_create(const void* data, size_t dataLength, enet_uint32 flags) {
  1193. ENetPacket* packet;
  1194. if (flags & ENET_PACKET_FLAG_NO_ALLOCATE) {
  1195. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket));
  1196. if (packet == NULL)
  1197. return NULL;
  1198. packet->data = (enet_uint8*)data;
  1199. }
  1200. else {
  1201. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket) + dataLength);
  1202. if (packet == NULL)
  1203. return NULL;
  1204. packet->data = (enet_uint8*)packet + sizeof(ENetPacket);
  1205. if (data != NULL)
  1206. memcpy(packet->data, data, dataLength);
  1207. }
  1208. packet->referenceCount = 0;
  1209. packet->flags = flags;
  1210. packet->dataLength = dataLength;
  1211. packet->freeCallback = NULL;
  1212. return packet;
  1213. }
  1214. ENetPacket* enet_packet_create_offset(const void* data, size_t dataLength, size_t dataOffset, enet_uint32 flags) {
  1215. ENetPacket* packet;
  1216. if (flags & ENET_PACKET_FLAG_NO_ALLOCATE) {
  1217. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket));
  1218. if (packet == NULL)
  1219. return NULL;
  1220. packet->data = (enet_uint8*)data;
  1221. }
  1222. else {
  1223. packet = (ENetPacket*)enet_malloc(sizeof(ENetPacket) + dataLength - dataOffset);
  1224. if (packet == NULL)
  1225. return NULL;
  1226. packet->data = (enet_uint8*)packet + sizeof(ENetPacket);
  1227. if (data != NULL)
  1228. memcpy(packet->data, (char*)data + dataOffset, dataLength - dataOffset);
  1229. }
  1230. packet->referenceCount = 0;
  1231. packet->flags = flags;
  1232. packet->dataLength = dataLength - dataOffset;
  1233. packet->freeCallback = NULL;
  1234. return packet;
  1235. }
  1236. void enet_packet_destroy(ENetPacket* packet) {
  1237. if (packet == NULL)
  1238. return;
  1239. if (packet->freeCallback != NULL)
  1240. (*packet->freeCallback)((void*)packet);
  1241. enet_free(packet);
  1242. }
  1243. /*
  1244. =======================================================================
  1245. Protocol
  1246. =======================================================================
  1247. */
  1248. static size_t commandSizes[ENET_PROTOCOL_COMMAND_COUNT] = {
  1249. 0,
  1250. sizeof(ENetProtocolAcknowledge),
  1251. sizeof(ENetProtocolConnect),
  1252. sizeof(ENetProtocolVerifyConnect),
  1253. sizeof(ENetProtocolDisconnect),
  1254. sizeof(ENetProtocolPing),
  1255. sizeof(ENetProtocolSendReliable),
  1256. sizeof(ENetProtocolSendUnreliable),
  1257. sizeof(ENetProtocolSendFragment),
  1258. sizeof(ENetProtocolSendUnsequenced),
  1259. sizeof(ENetProtocolBandwidthLimit),
  1260. sizeof(ENetProtocolThrottleConfigure),
  1261. sizeof(ENetProtocolSendFragment)
  1262. };
  1263. size_t enet_protocol_command_size(enet_uint8 commandNumber) {
  1264. return commandSizes[commandNumber & ENET_PROTOCOL_COMMAND_MASK];
  1265. }
  1266. static void enet_protocol_change_state(ENetHost* host, ENetPeer* peer, ENetPeerState state) {
  1267. if (state == ENET_PEER_STATE_CONNECTED || state == ENET_PEER_STATE_DISCONNECT_LATER)
  1268. enet_peer_on_connect(peer);
  1269. else
  1270. enet_peer_on_disconnect(peer);
  1271. peer->state = state;
  1272. }
  1273. static void enet_protocol_dispatch_state(ENetHost* host, ENetPeer* peer, ENetPeerState state) {
  1274. enet_protocol_change_state(host, peer, state);
  1275. if (!peer->needsDispatch) {
  1276. enet_list_insert(enet_list_end(&host->dispatchQueue), &peer->dispatchList);
  1277. peer->needsDispatch = 1;
  1278. }
  1279. }
  1280. static int enet_protocol_dispatch_incoming_commands(ENetHost* host, ENetEvent* event) {
  1281. while (!enet_list_empty(&host->dispatchQueue)) {
  1282. ENetPeer* peer = (ENetPeer*)enet_list_remove(enet_list_begin(&host->dispatchQueue));
  1283. peer->needsDispatch = 0;
  1284. switch (peer->state) {
  1285. case ENET_PEER_STATE_CONNECTION_PENDING:
  1286. case ENET_PEER_STATE_CONNECTION_SUCCEEDED:
  1287. enet_protocol_change_state(host, peer, ENET_PEER_STATE_CONNECTED);
  1288. event->type = ENET_EVENT_TYPE_CONNECT;
  1289. event->peer = peer;
  1290. event->data = peer->eventData;
  1291. return 1;
  1292. case ENET_PEER_STATE_ZOMBIE:
  1293. host->recalculateBandwidthLimits = 1;
  1294. event->type = ENET_EVENT_TYPE_DISCONNECT;
  1295. event->peer = peer;
  1296. event->data = peer->eventData;
  1297. enet_peer_reset(peer);
  1298. return 1;
  1299. case ENET_PEER_STATE_CONNECTED:
  1300. if (enet_list_empty(&peer->dispatchedCommands))
  1301. continue;
  1302. event->packet = enet_peer_receive(peer, &event->channelID);
  1303. if (event->packet == NULL)
  1304. continue;
  1305. event->type = ENET_EVENT_TYPE_RECEIVE;
  1306. event->peer = peer;
  1307. if (!enet_list_empty(&peer->dispatchedCommands)) {
  1308. peer->needsDispatch = 1;
  1309. enet_list_insert(enet_list_end(&host->dispatchQueue), &peer->dispatchList);
  1310. }
  1311. return 1;
  1312. default:
  1313. break;
  1314. }
  1315. }
  1316. return 0;
  1317. }
  1318. static void enet_protocol_notify_connect(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  1319. host->recalculateBandwidthLimits = 1;
  1320. if (event != NULL) {
  1321. enet_protocol_change_state(host, peer, ENET_PEER_STATE_CONNECTED);
  1322. peer->totalDataSent = 0;
  1323. peer->totalDataReceived = 0;
  1324. peer->totalPacketsSent = 0;
  1325. peer->totalPacketsLost = 0;
  1326. event->type = ENET_EVENT_TYPE_CONNECT;
  1327. event->peer = peer;
  1328. event->data = peer->eventData;
  1329. }
  1330. else {
  1331. enet_protocol_dispatch_state(host, peer, peer->state == ENET_PEER_STATE_CONNECTING ? ENET_PEER_STATE_CONNECTION_SUCCEEDED : ENET_PEER_STATE_CONNECTION_PENDING);
  1332. }
  1333. }
  1334. static void enet_protocol_notify_disconnect(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  1335. if (peer->state >= ENET_PEER_STATE_CONNECTION_PENDING)
  1336. host->recalculateBandwidthLimits = 1;
  1337. if (peer->state != ENET_PEER_STATE_CONNECTING && peer->state < ENET_PEER_STATE_CONNECTION_SUCCEEDED) {
  1338. enet_peer_reset(peer);
  1339. }
  1340. else if (event != NULL) {
  1341. event->type = ENET_EVENT_TYPE_DISCONNECT;
  1342. event->peer = peer;
  1343. event->data = 0;
  1344. enet_peer_reset(peer);
  1345. }
  1346. else {
  1347. peer->eventData = 0;
  1348. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1349. }
  1350. }
  1351. static void enet_protocol_notify_disconnect_timeout(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  1352. if (peer->state >= ENET_PEER_STATE_CONNECTION_PENDING)
  1353. host->recalculateBandwidthLimits = 1;
  1354. if (peer->state != ENET_PEER_STATE_CONNECTING && peer->state < ENET_PEER_STATE_CONNECTION_SUCCEEDED) {
  1355. enet_peer_reset(peer);
  1356. }
  1357. else if (event != NULL) {
  1358. event->type = ENET_EVENT_TYPE_DISCONNECT_TIMEOUT;
  1359. event->peer = peer;
  1360. event->data = 0;
  1361. enet_peer_reset(peer);
  1362. }
  1363. else {
  1364. peer->eventData = 0;
  1365. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1366. }
  1367. }
  1368. static void enet_protocol_remove_sent_unreliable_commands(ENetPeer* peer) {
  1369. ENetOutgoingCommand* outgoingCommand;
  1370. if (enet_list_empty(&peer->sentUnreliableCommands))
  1371. return;
  1372. do {
  1373. outgoingCommand = (ENetOutgoingCommand*)enet_list_front(&peer->sentUnreliableCommands);
  1374. enet_list_remove(&outgoingCommand->outgoingCommandList);
  1375. if (outgoingCommand->packet != NULL) {
  1376. --outgoingCommand->packet->referenceCount;
  1377. if (outgoingCommand->packet->referenceCount == 0) {
  1378. outgoingCommand->packet->flags |= ENET_PACKET_FLAG_SENT;
  1379. enet_packet_destroy(outgoingCommand->packet);
  1380. }
  1381. }
  1382. enet_free(outgoingCommand);
  1383. }
  1384. while (!enet_list_empty(&peer->sentUnreliableCommands));
  1385. if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER && enet_list_empty(&peer->outgoingReliableCommands) && enet_list_empty(&peer->outgoingUnreliableCommands) && enet_list_empty(&peer->sentReliableCommands))
  1386. enet_peer_disconnect(peer, peer->eventData);
  1387. }
  1388. static ENetProtocolCommand enet_protocol_remove_sent_reliable_command(ENetPeer* peer, enet_uint16 reliableSequenceNumber, enet_uint8 channelID) {
  1389. ENetOutgoingCommand* outgoingCommand = NULL;
  1390. ENetListIterator currentCommand;
  1391. ENetProtocolCommand commandNumber;
  1392. int wasSent = 1;
  1393. for (currentCommand = enet_list_begin(&peer->sentReliableCommands); currentCommand != enet_list_end(&peer->sentReliableCommands); currentCommand = enet_list_next(currentCommand)) {
  1394. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  1395. if (outgoingCommand->reliableSequenceNumber == reliableSequenceNumber && outgoingCommand->command.header.channelID == channelID)
  1396. break;
  1397. }
  1398. if (currentCommand == enet_list_end(&peer->sentReliableCommands)) {
  1399. for (currentCommand = enet_list_begin(&peer->outgoingReliableCommands); currentCommand != enet_list_end(&peer->outgoingReliableCommands); currentCommand = enet_list_next(currentCommand)) {
  1400. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  1401. if (outgoingCommand->sendAttempts < 1)
  1402. return ENET_PROTOCOL_COMMAND_NONE;
  1403. if (outgoingCommand->reliableSequenceNumber == reliableSequenceNumber && outgoingCommand->command.header.channelID == channelID)
  1404. break;
  1405. }
  1406. if (currentCommand == enet_list_end(&peer->outgoingReliableCommands))
  1407. return ENET_PROTOCOL_COMMAND_NONE;
  1408. wasSent = 0;
  1409. }
  1410. if (outgoingCommand == NULL)
  1411. return ENET_PROTOCOL_COMMAND_NONE;
  1412. if (channelID < peer->channelCount) {
  1413. ENetChannel* channel = &peer->channels[channelID];
  1414. enet_uint16 reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1415. if (channel->reliableWindows[reliableWindow] > 0) {
  1416. --channel->reliableWindows[reliableWindow];
  1417. if (!channel->reliableWindows[reliableWindow])
  1418. channel->usedReliableWindows &= ~(1 << reliableWindow);
  1419. }
  1420. }
  1421. commandNumber = (ENetProtocolCommand)(outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK);
  1422. enet_list_remove(&outgoingCommand->outgoingCommandList);
  1423. if (outgoingCommand->packet != NULL) {
  1424. if (wasSent)
  1425. peer->reliableDataInTransit -= outgoingCommand->fragmentLength;
  1426. --outgoingCommand->packet->referenceCount;
  1427. if (outgoingCommand->packet->referenceCount == 0) {
  1428. outgoingCommand->packet->flags |= ENET_PACKET_FLAG_SENT;
  1429. enet_packet_destroy(outgoingCommand->packet);
  1430. }
  1431. }
  1432. enet_free(outgoingCommand);
  1433. if (enet_list_empty(&peer->sentReliableCommands))
  1434. return commandNumber;
  1435. outgoingCommand = (ENetOutgoingCommand*)enet_list_front(&peer->sentReliableCommands);
  1436. peer->nextTimeout = outgoingCommand->sentTime + outgoingCommand->roundTripTimeout;
  1437. return commandNumber;
  1438. }
  1439. static ENetPeer* enet_protocol_handle_connect(ENetHost* host, ENetProtocolHeader* header, ENetProtocol* command) {
  1440. enet_uint8 incomingSessionID, outgoingSessionID;
  1441. enet_uint32 mtu, windowSize;
  1442. ENetChannel* channel;
  1443. size_t channelCount, duplicatePeers = 0;
  1444. ENetPeer* currentPeer, * peer = NULL;
  1445. ENetProtocol verifyCommand;
  1446. channelCount = ENET_NET_TO_HOST_32(command->connect.channelCount);
  1447. if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT || channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  1448. return NULL;
  1449. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  1450. if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED) {
  1451. if (peer == NULL)
  1452. peer = currentPeer;
  1453. }
  1454. else if (currentPeer->state != ENET_PEER_STATE_CONNECTING && enet_in6_equal(currentPeer->address.ipv6, host->receivedAddress.ipv6)) {
  1455. if (currentPeer->address.port == host->receivedAddress.port && currentPeer->connectID == command->connect.connectID)
  1456. return NULL;
  1457. ++duplicatePeers;
  1458. }
  1459. }
  1460. if (peer == NULL || duplicatePeers >= host->duplicatePeers)
  1461. return NULL;
  1462. if (channelCount > host->channelLimit)
  1463. channelCount = host->channelLimit;
  1464. peer->channels = (ENetChannel*)enet_malloc(channelCount * sizeof(ENetChannel));
  1465. if (peer->channels == NULL)
  1466. return NULL;
  1467. peer->channelCount = channelCount;
  1468. peer->state = ENET_PEER_STATE_ACKNOWLEDGING_CONNECT;
  1469. peer->connectID = command->connect.connectID;
  1470. peer->address = host->receivedAddress;
  1471. peer->outgoingPeerID = ENET_NET_TO_HOST_16(command->connect.outgoingPeerID);
  1472. peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->connect.incomingBandwidth);
  1473. peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->connect.outgoingBandwidth);
  1474. peer->packetThrottleInterval = ENET_NET_TO_HOST_32(command->connect.packetThrottleInterval);
  1475. peer->packetThrottleAcceleration = ENET_NET_TO_HOST_32(command->connect.packetThrottleAcceleration);
  1476. peer->packetThrottleDeceleration = ENET_NET_TO_HOST_32(command->connect.packetThrottleDeceleration);
  1477. peer->eventData = ENET_NET_TO_HOST_32(command->connect.data);
  1478. incomingSessionID = command->connect.incomingSessionID == 0xFF ? peer->outgoingSessionID : command->connect.incomingSessionID;
  1479. incomingSessionID = (incomingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1480. if (incomingSessionID == peer->outgoingSessionID)
  1481. incomingSessionID = (incomingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1482. peer->outgoingSessionID = incomingSessionID;
  1483. outgoingSessionID = command->connect.outgoingSessionID == 0xFF ? peer->incomingSessionID : command->connect.outgoingSessionID;
  1484. outgoingSessionID = (outgoingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1485. if (outgoingSessionID == peer->incomingSessionID)
  1486. outgoingSessionID = (outgoingSessionID + 1) & (ENET_PROTOCOL_HEADER_SESSION_MASK >> ENET_PROTOCOL_HEADER_SESSION_SHIFT);
  1487. peer->incomingSessionID = outgoingSessionID;
  1488. for (channel = peer->channels; channel < &peer->channels[channelCount]; ++channel) {
  1489. channel->outgoingReliableSequenceNumber = 0;
  1490. channel->outgoingUnreliableSequenceNumber = 0;
  1491. channel->incomingReliableSequenceNumber = 0;
  1492. channel->incomingUnreliableSequenceNumber = 0;
  1493. enet_list_clear(&channel->incomingReliableCommands);
  1494. enet_list_clear(&channel->incomingUnreliableCommands);
  1495. channel->usedReliableWindows = 0;
  1496. memset(channel->reliableWindows, 0, sizeof(channel->reliableWindows));
  1497. }
  1498. mtu = ENET_NET_TO_HOST_32(command->connect.mtu);
  1499. if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
  1500. mtu = ENET_PROTOCOL_MINIMUM_MTU;
  1501. else if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
  1502. mtu = ENET_PROTOCOL_MAXIMUM_MTU;
  1503. peer->mtu = mtu;
  1504. if (host->outgoingBandwidth == 0 && peer->incomingBandwidth == 0)
  1505. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1506. else if (host->outgoingBandwidth == 0 || peer->incomingBandwidth == 0)
  1507. peer->windowSize = (ENET_MAX(host->outgoingBandwidth, peer->incomingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1508. else
  1509. peer->windowSize = (ENET_MIN(host->outgoingBandwidth, peer->incomingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1510. if (peer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1511. peer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1512. else if (peer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1513. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1514. if (host->incomingBandwidth == 0)
  1515. windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1516. else
  1517. windowSize = (host->incomingBandwidth / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1518. if (windowSize > ENET_NET_TO_HOST_32(command->connect.windowSize))
  1519. windowSize = ENET_NET_TO_HOST_32(command->connect.windowSize);
  1520. if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1521. windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1522. else if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1523. windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1524. verifyCommand.header.command = ENET_PROTOCOL_COMMAND_VERIFY_CONNECT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  1525. verifyCommand.header.channelID = 0xFF;
  1526. verifyCommand.verifyConnect.outgoingPeerID = ENET_HOST_TO_NET_16(peer->incomingPeerID);
  1527. verifyCommand.verifyConnect.incomingSessionID = incomingSessionID;
  1528. verifyCommand.verifyConnect.outgoingSessionID = outgoingSessionID;
  1529. verifyCommand.verifyConnect.mtu = ENET_HOST_TO_NET_32(peer->mtu);
  1530. verifyCommand.verifyConnect.windowSize = ENET_HOST_TO_NET_32(windowSize);
  1531. verifyCommand.verifyConnect.channelCount = ENET_HOST_TO_NET_32(channelCount);
  1532. verifyCommand.verifyConnect.incomingBandwidth = ENET_HOST_TO_NET_32(host->incomingBandwidth);
  1533. verifyCommand.verifyConnect.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
  1534. verifyCommand.verifyConnect.packetThrottleInterval = ENET_HOST_TO_NET_32(peer->packetThrottleInterval);
  1535. verifyCommand.verifyConnect.packetThrottleAcceleration = ENET_HOST_TO_NET_32(peer->packetThrottleAcceleration);
  1536. verifyCommand.verifyConnect.packetThrottleDeceleration = ENET_HOST_TO_NET_32(peer->packetThrottleDeceleration);
  1537. verifyCommand.verifyConnect.connectID = peer->connectID;
  1538. enet_peer_queue_outgoing_command(peer, &verifyCommand, NULL, 0, 0);
  1539. return peer;
  1540. }
  1541. static int enet_protocol_handle_send_reliable(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, enet_uint8** currentData) {
  1542. size_t dataLength;
  1543. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1544. ENET_LOG_ERROR("channel id is greater than the peer's channel count or the peer isn't in connected state and isn't pending disconnection later");
  1545. return ENET_PROTOCOL_SEND_FAIL;
  1546. }
  1547. dataLength = ENET_NET_TO_HOST_16(command->sendReliable.dataLength);
  1548. *currentData += dataLength;
  1549. if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1550. ENET_LOG_ERROR("data length is wacko");
  1551. return ENET_PACKET_DATA_LENGTH_WEIRDNESS;
  1552. }
  1553. if (enet_peer_queue_incoming_command(peer, command, (const enet_uint8*)command + sizeof(ENetProtocolSendReliable), dataLength, ENET_PACKET_FLAG_RELIABLE, 0) == NULL) {
  1554. ENET_LOG_ERROR("Could not queue incoming command, it returned NULL");
  1555. return ENET_PEER_QUEUE_INCOMING_FAILURE;
  1556. }
  1557. return 0;
  1558. }
  1559. static int enet_protocol_handle_send_unsequenced(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, enet_uint8** currentData) {
  1560. enet_uint32 unsequencedGroup, index;
  1561. size_t dataLength;
  1562. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1563. ENET_LOG_ERROR("channel id is greater than the peer's channel count or the peer isn't in connected state and isn't pending disconnection later");
  1564. return ENET_PROTOCOL_SEND_FAIL;
  1565. }
  1566. dataLength = ENET_NET_TO_HOST_16(command->sendUnsequenced.dataLength);
  1567. *currentData += dataLength;
  1568. if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1569. ENET_LOG_ERROR("data length is wacko");
  1570. return ENET_PACKET_DATA_LENGTH_WEIRDNESS;
  1571. }
  1572. unsequencedGroup = ENET_NET_TO_HOST_16(command->sendUnsequenced.unsequencedGroup);
  1573. index = unsequencedGroup % ENET_PEER_UNSEQUENCED_WINDOW_SIZE;
  1574. if (unsequencedGroup < peer->incomingUnsequencedGroup)
  1575. unsequencedGroup += 0x10000;
  1576. if (unsequencedGroup >= (enet_uint32)peer->incomingUnsequencedGroup + ENET_PEER_FREE_UNSEQUENCED_WINDOWS * ENET_PEER_UNSEQUENCED_WINDOW_SIZE)
  1577. return 0;
  1578. unsequencedGroup &= 0xFFFF;
  1579. if (unsequencedGroup - index != peer->incomingUnsequencedGroup) {
  1580. peer->incomingUnsequencedGroup = unsequencedGroup - index;
  1581. memset(peer->unsequencedWindow, 0, sizeof(peer->unsequencedWindow));
  1582. }
  1583. else if (peer->unsequencedWindow[index / 32] & (1 << (index % 32))) {
  1584. return 0;
  1585. }
  1586. if (enet_peer_queue_incoming_command(peer, command, (const enet_uint8*)command + sizeof(ENetProtocolSendUnsequenced), dataLength, ENET_PACKET_FLAG_UNSEQUENCED, 0) == NULL) {
  1587. ENET_LOG_ERROR("Could not queue incoming command, it returned NULL");
  1588. return ENET_PEER_QUEUE_INCOMING_FAILURE;
  1589. }
  1590. peer->unsequencedWindow[index / 32] |= 1 << (index % 32);
  1591. return 0;
  1592. }
  1593. static int enet_protocol_handle_send_unreliable(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, enet_uint8** currentData) {
  1594. size_t dataLength;
  1595. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1596. ENET_LOG_ERROR("channel id is greater than the peer's channel count or the peer isn't in connected state and isn't pending disconnection later");
  1597. return ENET_PROTOCOL_SEND_FAIL;
  1598. }
  1599. dataLength = ENET_NET_TO_HOST_16(command->sendUnreliable.dataLength);
  1600. *currentData += dataLength;
  1601. if (dataLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1602. ENET_LOG_ERROR("data length is wacko");
  1603. return ENET_PACKET_DATA_LENGTH_WEIRDNESS;
  1604. }
  1605. if (enet_peer_queue_incoming_command(peer, command, (const enet_uint8*)command + sizeof(ENetProtocolSendUnreliable), dataLength, 0, 0) == NULL) {
  1606. ENET_LOG_ERROR("Could not queue incoming command, it returned NULL");
  1607. return ENET_PEER_QUEUE_INCOMING_FAILURE;
  1608. }
  1609. return 0;
  1610. }
  1611. static int enet_protocol_handle_send_fragment(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, enet_uint8** currentData) {
  1612. enet_uint32 fragmentNumber, fragmentCount, fragmentOffset, fragmentLength, startSequenceNumber, totalLength;
  1613. ENetChannel* channel;
  1614. enet_uint16 startWindow, currentWindow;
  1615. ENetListIterator currentCommand;
  1616. ENetIncomingCommand* startCommand = NULL;
  1617. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1618. ENET_LOG_ERROR("channel id is greater than the peer's channel count or the peer isn't in connected state and isn't pending disconnection later");
  1619. return ENET_PROTOCOL_SEND_FAIL;
  1620. }
  1621. fragmentLength = ENET_NET_TO_HOST_16(command->sendFragment.dataLength);
  1622. *currentData += fragmentLength;
  1623. if (fragmentLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1624. ENET_LOG_ERROR("data length is wacko");
  1625. return ENET_PACKET_DATA_LENGTH_WEIRDNESS;
  1626. }
  1627. channel = &peer->channels[command->header.channelID];
  1628. startSequenceNumber = ENET_NET_TO_HOST_16(command->sendFragment.startSequenceNumber);
  1629. startWindow = startSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1630. currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1631. if (startSequenceNumber < channel->incomingReliableSequenceNumber)
  1632. startWindow += ENET_PEER_RELIABLE_WINDOWS;
  1633. if (startWindow < currentWindow || startWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  1634. return 0;
  1635. fragmentNumber = ENET_NET_TO_HOST_32(command->sendFragment.fragmentNumber);
  1636. fragmentCount = ENET_NET_TO_HOST_32(command->sendFragment.fragmentCount);
  1637. fragmentOffset = ENET_NET_TO_HOST_32(command->sendFragment.fragmentOffset);
  1638. totalLength = ENET_NET_TO_HOST_32(command->sendFragment.totalLength);
  1639. if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT || fragmentNumber >= fragmentCount || totalLength > host->maximumPacketSize || fragmentOffset >= totalLength || fragmentLength > totalLength - fragmentOffset) {
  1640. ENET_LOG_ERROR("Some fragment weirdness going on here");
  1641. return ENET_PACKET_DATA_FRAGMENT_WEIRDNESS;
  1642. }
  1643. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingReliableCommands)); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  1644. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  1645. if (startSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1646. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  1647. continue;
  1648. }
  1649. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1650. break;
  1651. }
  1652. if (incomingCommand->reliableSequenceNumber <= startSequenceNumber) {
  1653. if (incomingCommand->reliableSequenceNumber < startSequenceNumber)
  1654. break;
  1655. if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_FRAGMENT || totalLength != incomingCommand->packet->dataLength || fragmentCount != incomingCommand->fragmentCount) {
  1656. ENET_LOG_ERROR("Some fragment weirdness going on here");
  1657. return ENET_PACKET_DATA_FRAGMENT_WEIRDNESS;
  1658. }
  1659. startCommand = incomingCommand;
  1660. break;
  1661. }
  1662. }
  1663. if (startCommand == NULL) {
  1664. ENetProtocol hostCommand = *command;
  1665. hostCommand.header.reliableSequenceNumber = startSequenceNumber;
  1666. startCommand = enet_peer_queue_incoming_command(peer, &hostCommand, NULL, totalLength, ENET_PACKET_FLAG_RELIABLE, fragmentCount);
  1667. if (startCommand == NULL) {
  1668. ENET_LOG_ERROR("startCommand was NULL.");
  1669. return ENET_PACKET_STARTCMD_NULL;
  1670. }
  1671. }
  1672. if ((startCommand->fragments[fragmentNumber / 32] & (1 << (fragmentNumber % 32))) == 0) {
  1673. --startCommand->fragmentsRemaining;
  1674. startCommand->fragments[fragmentNumber / 32] |= (1 << (fragmentNumber % 32));
  1675. if (fragmentOffset + fragmentLength > startCommand->packet->dataLength)
  1676. fragmentLength = startCommand->packet->dataLength - fragmentOffset;
  1677. memcpy(startCommand->packet->data + fragmentOffset, (enet_uint8*)command + sizeof(ENetProtocolSendFragment), fragmentLength);
  1678. if (startCommand->fragmentsRemaining <= 0)
  1679. enet_peer_dispatch_incoming_reliable_commands(peer, channel);
  1680. }
  1681. return 0;
  1682. }
  1683. static int enet_protocol_handle_send_unreliable_fragment(ENetHost* host, ENetPeer* peer, const ENetProtocol* command, enet_uint8** currentData) {
  1684. enet_uint32 fragmentNumber, fragmentCount, fragmentOffset, fragmentLength, reliableSequenceNumber, startSequenceNumber, totalLength;
  1685. enet_uint16 reliableWindow, currentWindow;
  1686. ENetChannel* channel;
  1687. ENetListIterator currentCommand;
  1688. ENetIncomingCommand* startCommand = NULL;
  1689. if (command->header.channelID >= peer->channelCount || (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)) {
  1690. ENET_LOG_ERROR("channel id is greater than the peer's channel count or the peer isn't in connected state and isn't pending disconnection later");
  1691. return ENET_PROTOCOL_SEND_FAIL;
  1692. }
  1693. fragmentLength = ENET_NET_TO_HOST_16(command->sendFragment.dataLength);
  1694. *currentData += fragmentLength;
  1695. if (fragmentLength > host->maximumPacketSize || *currentData < host->receivedData || *currentData > & host->receivedData[host->receivedDataLength]) {
  1696. ENET_LOG_ERROR("fragment data length is wacko");
  1697. return ENET_PACKET_DATA_LENGTH_WEIRDNESS;
  1698. }
  1699. channel = &peer->channels[command->header.channelID];
  1700. reliableSequenceNumber = command->header.reliableSequenceNumber;
  1701. startSequenceNumber = ENET_NET_TO_HOST_16(command->sendFragment.startSequenceNumber);
  1702. reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1703. currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  1704. if (reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  1705. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  1706. if (reliableWindow < currentWindow || reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  1707. return 0;
  1708. if (reliableSequenceNumber == channel->incomingReliableSequenceNumber && startSequenceNumber <= channel->incomingUnreliableSequenceNumber)
  1709. return 0;
  1710. fragmentNumber = ENET_NET_TO_HOST_32(command->sendFragment.fragmentNumber);
  1711. fragmentCount = ENET_NET_TO_HOST_32(command->sendFragment.fragmentCount);
  1712. fragmentOffset = ENET_NET_TO_HOST_32(command->sendFragment.fragmentOffset);
  1713. totalLength = ENET_NET_TO_HOST_32(command->sendFragment.totalLength);
  1714. if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT || fragmentNumber >= fragmentCount || totalLength > host->maximumPacketSize || fragmentOffset >= totalLength || fragmentLength > totalLength - fragmentOffset) {
  1715. ENET_LOG_ERROR("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");
  1716. return ENET_PEER_SENDFAIL_FRAGMENTOVERLOAD;
  1717. }
  1718. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingUnreliableCommands)); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  1719. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  1720. if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1721. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  1722. continue;
  1723. }
  1724. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  1725. break;
  1726. }
  1727. if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
  1728. break;
  1729. if (incomingCommand->reliableSequenceNumber > reliableSequenceNumber)
  1730. continue;
  1731. if (incomingCommand->unreliableSequenceNumber <= startSequenceNumber) {
  1732. if (incomingCommand->unreliableSequenceNumber < startSequenceNumber)
  1733. break;
  1734. if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT || totalLength != incomingCommand->packet->dataLength || fragmentCount != incomingCommand->fragmentCount) {
  1735. ENET_LOG_ERROR("Some fragment weirdness going on here");
  1736. return ENET_PACKET_DATA_FRAGMENT_WEIRDNESS;
  1737. }
  1738. startCommand = incomingCommand;
  1739. break;
  1740. }
  1741. }
  1742. if (startCommand == NULL) {
  1743. startCommand = enet_peer_queue_incoming_command(peer, command, NULL, totalLength,
  1744. ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED, fragmentCount);
  1745. if (startCommand == NULL) {
  1746. ENET_LOG_ERROR("startCommand was NULL");
  1747. return ENET_PACKET_STARTCMD_NULL;
  1748. }
  1749. }
  1750. if ((startCommand->fragments[fragmentNumber / 32] & (1 << (fragmentNumber % 32))) == 0) {
  1751. --startCommand->fragmentsRemaining;
  1752. startCommand->fragments[fragmentNumber / 32] |= (1 << (fragmentNumber % 32));
  1753. if (fragmentOffset + fragmentLength > startCommand->packet->dataLength)
  1754. fragmentLength = startCommand->packet->dataLength - fragmentOffset;
  1755. memcpy(startCommand->packet->data + fragmentOffset, (enet_uint8*)command + sizeof(ENetProtocolSendFragment), fragmentLength);
  1756. if (startCommand->fragmentsRemaining <= 0)
  1757. enet_peer_dispatch_incoming_unreliable_commands(peer, channel);
  1758. }
  1759. return 0;
  1760. }
  1761. static int enet_protocol_handle_ping(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1762. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1763. ENET_LOG_ERROR("Doing jack squat on a peer that is not connected correctly");
  1764. return ENET_PEER_NOT_CONNECTED_CORRECTLY;
  1765. }
  1766. return 0;
  1767. }
  1768. static int enet_protocol_handle_bandwidth_limit(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1769. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1770. ENET_LOG_ERROR("Doing jack squat on a peer that is not connected correctly");
  1771. return ENET_PEER_NOT_CONNECTED_CORRECTLY;
  1772. }
  1773. if (peer->incomingBandwidth != 0)
  1774. --host->bandwidthLimitedPeers;
  1775. peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->bandwidthLimit.incomingBandwidth);
  1776. peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->bandwidthLimit.outgoingBandwidth);
  1777. if (peer->incomingBandwidth != 0)
  1778. ++host->bandwidthLimitedPeers;
  1779. if (peer->incomingBandwidth == 0 && host->outgoingBandwidth == 0)
  1780. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1781. else if (peer->incomingBandwidth == 0 || host->outgoingBandwidth == 0)
  1782. peer->windowSize = (ENET_MAX(peer->incomingBandwidth, host->outgoingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1783. else
  1784. peer->windowSize = (ENET_MIN(peer->incomingBandwidth, host->outgoingBandwidth) / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1785. if (peer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1786. peer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1787. else if (peer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1788. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1789. return 0;
  1790. }
  1791. static int enet_protocol_handle_throttle_configure(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1792. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1793. ENET_LOG_ERROR("Doing jack squat on a peer that is not connected correctly");
  1794. return ENET_PEER_NOT_CONNECTED_CORRECTLY;
  1795. }
  1796. peer->packetThrottleInterval = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleInterval);
  1797. peer->packetThrottleAcceleration = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleAcceleration);
  1798. peer->packetThrottleDeceleration = ENET_NET_TO_HOST_32(command->throttleConfigure.packetThrottleDeceleration);
  1799. return 0;
  1800. }
  1801. static int enet_protocol_handle_disconnect(ENetHost* host, ENetPeer* peer, const ENetProtocol* command) {
  1802. if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE || peer->state == ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT)
  1803. return 0;
  1804. enet_peer_reset_queues(peer);
  1805. if (peer->state == ENET_PEER_STATE_CONNECTION_SUCCEEDED || peer->state == ENET_PEER_STATE_DISCONNECTING || peer->state == ENET_PEER_STATE_CONNECTING) {
  1806. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1807. }
  1808. else if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  1809. if (peer->state == ENET_PEER_STATE_CONNECTION_PENDING)
  1810. host->recalculateBandwidthLimits = 1;
  1811. enet_peer_reset(peer);
  1812. }
  1813. else if (command->header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
  1814. enet_protocol_change_state(host, peer, ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT);
  1815. }
  1816. else {
  1817. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1818. }
  1819. if (peer->state != ENET_PEER_STATE_DISCONNECTED)
  1820. peer->eventData = ENET_NET_TO_HOST_32(command->disconnect.data);
  1821. return 0;
  1822. }
  1823. static int enet_protocol_handle_acknowledge(ENetHost* host, ENetEvent* event, ENetPeer* peer, const ENetProtocol* command) {
  1824. enet_uint32 roundTripTime, receivedSentTime, receivedReliableSequenceNumber;
  1825. ENetProtocolCommand commandNumber;
  1826. if (peer->state == ENET_PEER_STATE_DISCONNECTED || peer->state == ENET_PEER_STATE_ZOMBIE)
  1827. return 0;
  1828. receivedSentTime = ENET_NET_TO_HOST_16(command->acknowledge.receivedSentTime);
  1829. receivedSentTime |= host->serviceTime & 0xFFFF0000;
  1830. if ((receivedSentTime & 0x8000) > (host->serviceTime & 0x8000))
  1831. receivedSentTime -= 0x10000;
  1832. if (ENET_TIME_LESS(host->serviceTime, receivedSentTime))
  1833. return 0;
  1834. peer->lastReceiveTime = host->serviceTime;
  1835. peer->earliestTimeout = 0;
  1836. roundTripTime = ENET_TIME_DIFFERENCE(host->serviceTime, receivedSentTime);
  1837. if (roundTripTime == 0)
  1838. roundTripTime = 1;
  1839. if (peer->smoothedRoundTripTime == 0)
  1840. peer->smoothedRoundTripTime = (enet_uint32)((1 - ENET_SRTT_PARA_G) * ENET_SRTT_INITIAL + ENET_SRTT_PARA_G * roundTripTime);
  1841. else
  1842. peer->smoothedRoundTripTime = (enet_uint32)((1 - ENET_SRTT_PARA_G) * peer->smoothedRoundTripTime + ENET_SRTT_PARA_G * roundTripTime);
  1843. enet_peer_throttle(peer, peer->smoothedRoundTripTime);
  1844. peer->roundTripTimeVariance -= peer->roundTripTimeVariance / 4;
  1845. if (peer->smoothedRoundTripTime >= peer->roundTripTime) {
  1846. peer->roundTripTime += (peer->smoothedRoundTripTime - peer->roundTripTime) / 8;
  1847. peer->roundTripTimeVariance += (peer->smoothedRoundTripTime - peer->roundTripTime) / 4;
  1848. }
  1849. else {
  1850. peer->roundTripTime -= (peer->roundTripTime - peer->smoothedRoundTripTime) / 8;
  1851. peer->roundTripTimeVariance += (peer->roundTripTime - peer->smoothedRoundTripTime) / 4;
  1852. }
  1853. if (peer->roundTripTime < peer->lowestRoundTripTime)
  1854. peer->lowestRoundTripTime = peer->roundTripTime;
  1855. if (peer->roundTripTimeVariance > peer->highestRoundTripTimeVariance)
  1856. peer->highestRoundTripTimeVariance = peer->roundTripTimeVariance;
  1857. if (peer->packetThrottleEpoch == 0 || ENET_TIME_DIFFERENCE(host->serviceTime, peer->packetThrottleEpoch) >= peer->packetThrottleInterval) {
  1858. peer->lastRoundTripTime = peer->lowestRoundTripTime;
  1859. peer->lastRoundTripTimeVariance = peer->highestRoundTripTimeVariance;
  1860. peer->lowestRoundTripTime = peer->roundTripTime;
  1861. peer->highestRoundTripTimeVariance = peer->roundTripTimeVariance;
  1862. peer->packetThrottleEpoch = host->serviceTime;
  1863. }
  1864. receivedReliableSequenceNumber = ENET_NET_TO_HOST_16(command->acknowledge.receivedReliableSequenceNumber);
  1865. commandNumber = enet_protocol_remove_sent_reliable_command(peer, receivedReliableSequenceNumber, command->header.channelID);
  1866. switch (peer->state) {
  1867. case ENET_PEER_STATE_ACKNOWLEDGING_CONNECT:
  1868. if (commandNumber != ENET_PROTOCOL_COMMAND_VERIFY_CONNECT) {
  1869. ENET_LOG_ERROR("Wrong command number. Got %u vs %u", commandNumber, ENET_PROTOCOL_COMMAND_VERIFY_CONNECT);
  1870. return ENET_PEER_BAD_COMMAND_NUMBER;
  1871. }
  1872. enet_protocol_notify_connect(host, peer, event);
  1873. break;
  1874. case ENET_PEER_STATE_DISCONNECTING:
  1875. if (commandNumber != ENET_PROTOCOL_COMMAND_DISCONNECT) {
  1876. ENET_LOG_ERROR("Wrong command number. Got %u vs %u", commandNumber, ENET_PROTOCOL_COMMAND_DISCONNECT);
  1877. return ENET_PEER_BAD_COMMAND_NUMBER;
  1878. }
  1879. enet_protocol_notify_disconnect(host, peer, event);
  1880. break;
  1881. case ENET_PEER_STATE_DISCONNECT_LATER:
  1882. if (enet_list_empty(&peer->outgoingReliableCommands) && enet_list_empty(&peer->outgoingUnreliableCommands) && enet_list_empty(&peer->sentReliableCommands))
  1883. enet_peer_disconnect(peer, peer->eventData);
  1884. break;
  1885. default:
  1886. break;
  1887. }
  1888. return 0;
  1889. }
  1890. static int enet_protocol_handle_verify_connect(ENetHost* host, ENetEvent* event, ENetPeer* peer, const ENetProtocol* command) {
  1891. enet_uint32 mtu, windowSize;
  1892. size_t channelCount;
  1893. if (peer->state != ENET_PEER_STATE_CONNECTING)
  1894. return 0;
  1895. channelCount = ENET_NET_TO_HOST_32(command->verifyConnect.channelCount);
  1896. 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) {
  1897. peer->eventData = 0;
  1898. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  1899. ENET_LOG_ERROR("A peer has entered a Zombie state...");
  1900. return ENET_PEER_BECAME_ZOMBIE;
  1901. }
  1902. enet_protocol_remove_sent_reliable_command(peer, 1, 0xFF);
  1903. if (channelCount < peer->channelCount)
  1904. peer->channelCount = channelCount;
  1905. peer->outgoingPeerID = ENET_NET_TO_HOST_16(command->verifyConnect.outgoingPeerID);
  1906. peer->incomingSessionID = command->verifyConnect.incomingSessionID;
  1907. peer->outgoingSessionID = command->verifyConnect.outgoingSessionID;
  1908. mtu = ENET_NET_TO_HOST_32(command->verifyConnect.mtu);
  1909. if (mtu < ENET_PROTOCOL_MINIMUM_MTU)
  1910. mtu = ENET_PROTOCOL_MINIMUM_MTU;
  1911. else if (mtu > ENET_PROTOCOL_MAXIMUM_MTU)
  1912. mtu = ENET_PROTOCOL_MAXIMUM_MTU;
  1913. if (mtu < peer->mtu)
  1914. peer->mtu = mtu;
  1915. windowSize = ENET_NET_TO_HOST_32(command->verifyConnect.windowSize);
  1916. if (windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  1917. windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  1918. if (windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  1919. windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  1920. if (windowSize < peer->windowSize)
  1921. peer->windowSize = windowSize;
  1922. peer->incomingBandwidth = ENET_NET_TO_HOST_32(command->verifyConnect.incomingBandwidth);
  1923. peer->outgoingBandwidth = ENET_NET_TO_HOST_32(command->verifyConnect.outgoingBandwidth);
  1924. enet_protocol_notify_connect(host, peer, event);
  1925. return 0;
  1926. }
  1927. static int enet_protocol_handle_incoming_commands(ENetHost* host, ENetEvent* event) {
  1928. ENetProtocolHeader* header;
  1929. ENetProtocol* command;
  1930. ENetPeer* peer;
  1931. enet_uint8* currentData;
  1932. size_t headerSize;
  1933. enet_uint16 peerID, flags;
  1934. enet_uint8 sessionID;
  1935. if (host->receivedDataLength < (size_t) & ((ENetProtocolHeader*)0)->sentTime)
  1936. return 0;
  1937. header = (ENetProtocolHeader*)host->receivedData;
  1938. peerID = ENET_NET_TO_HOST_16(header->peerID);
  1939. sessionID = (peerID & ENET_PROTOCOL_HEADER_SESSION_MASK) >> ENET_PROTOCOL_HEADER_SESSION_SHIFT;
  1940. flags = peerID & ENET_PROTOCOL_HEADER_FLAG_MASK;
  1941. peerID &= ~(ENET_PROTOCOL_HEADER_FLAG_MASK | ENET_PROTOCOL_HEADER_SESSION_MASK);
  1942. headerSize = (flags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME ? sizeof(ENetProtocolHeader) : (size_t) & ((ENetProtocolHeader*)0)->sentTime);
  1943. if (host->checksumCallback != NULL)
  1944. headerSize += sizeof(enet_uint32);
  1945. if (peerID == ENET_PROTOCOL_MAXIMUM_PEER_ID) {
  1946. peer = NULL;
  1947. }
  1948. else if (peerID >= host->peerCount) {
  1949. return 0;
  1950. }
  1951. else {
  1952. peer = &host->peers[peerID];
  1953. 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))
  1954. return 0;
  1955. }
  1956. if (host->checksumCallback != NULL) {
  1957. enet_uint32* checksum = (enet_uint32*)&host->receivedData[headerSize - sizeof(enet_uint32)];
  1958. enet_uint32 desiredChecksum = *checksum;
  1959. ENetBuffer buffer;
  1960. *checksum = peer != NULL ? peer->connectID : 0;
  1961. buffer.data = host->receivedData;
  1962. buffer.dataLength = host->receivedDataLength;
  1963. if (host->checksumCallback(&buffer, 1) != desiredChecksum)
  1964. return 0;
  1965. }
  1966. if (peer != NULL) {
  1967. peer->address.ipv6 = host->receivedAddress.ipv6;
  1968. peer->address.port = host->receivedAddress.port;
  1969. peer->incomingDataTotal += host->receivedDataLength;
  1970. peer->totalDataReceived += host->receivedDataLength;
  1971. }
  1972. currentData = host->receivedData + headerSize;
  1973. while (currentData < &host->receivedData[host->receivedDataLength]) {
  1974. enet_uint8 commandNumber;
  1975. size_t commandSize;
  1976. command = (ENetProtocol*)currentData;
  1977. if (currentData + sizeof(ENetProtocolCommandHeader) > & host->receivedData[host->receivedDataLength])
  1978. break;
  1979. commandNumber = command->header.command & ENET_PROTOCOL_COMMAND_MASK;
  1980. if (commandNumber >= ENET_PROTOCOL_COMMAND_COUNT)
  1981. break;
  1982. commandSize = commandSizes[commandNumber];
  1983. if (commandSize == 0 || currentData + commandSize > & host->receivedData[host->receivedDataLength])
  1984. break;
  1985. currentData += commandSize;
  1986. if (peer == NULL && (commandNumber != ENET_PROTOCOL_COMMAND_CONNECT || currentData < &host->receivedData[host->receivedDataLength]))
  1987. break;
  1988. command->header.reliableSequenceNumber = ENET_NET_TO_HOST_16(command->header.reliableSequenceNumber);
  1989. switch (commandNumber) {
  1990. case ENET_PROTOCOL_COMMAND_ACKNOWLEDGE:
  1991. if (enet_protocol_handle_acknowledge(host, event, peer, command))
  1992. goto commandError;
  1993. break;
  1994. case ENET_PROTOCOL_COMMAND_CONNECT:
  1995. if (peer != NULL)
  1996. goto commandError;
  1997. if (host->preventConnections == 0) {
  1998. peer = enet_protocol_handle_connect(host, header, command);
  1999. if (peer == NULL)
  2000. goto commandError;
  2001. }
  2002. break;
  2003. case ENET_PROTOCOL_COMMAND_VERIFY_CONNECT:
  2004. if (enet_protocol_handle_verify_connect(host, event, peer, command))
  2005. goto commandError;
  2006. break;
  2007. case ENET_PROTOCOL_COMMAND_DISCONNECT:
  2008. if (enet_protocol_handle_disconnect(host, peer, command))
  2009. goto commandError;
  2010. break;
  2011. case ENET_PROTOCOL_COMMAND_PING:
  2012. if (enet_protocol_handle_ping(host, peer, command))
  2013. goto commandError;
  2014. break;
  2015. case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
  2016. if (enet_protocol_handle_send_reliable(host, peer, command, &currentData))
  2017. goto commandError;
  2018. break;
  2019. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
  2020. if (enet_protocol_handle_send_unreliable(host, peer, command, &currentData))
  2021. goto commandError;
  2022. break;
  2023. case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
  2024. if (enet_protocol_handle_send_unsequenced(host, peer, command, &currentData))
  2025. goto commandError;
  2026. break;
  2027. case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
  2028. if (enet_protocol_handle_send_fragment(host, peer, command, &currentData))
  2029. goto commandError;
  2030. break;
  2031. case ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT:
  2032. if (enet_protocol_handle_bandwidth_limit(host, peer, command))
  2033. goto commandError;
  2034. break;
  2035. case ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE:
  2036. if (enet_protocol_handle_throttle_configure(host, peer, command))
  2037. goto commandError;
  2038. break;
  2039. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT:
  2040. if (enet_protocol_handle_send_unreliable_fragment(host, peer, command, &currentData))
  2041. goto commandError;
  2042. break;
  2043. default:
  2044. goto commandError;
  2045. }
  2046. if (peer != NULL && (command->header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) != 0) {
  2047. enet_uint16 sentTime;
  2048. if (!(flags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME))
  2049. break;
  2050. sentTime = ENET_NET_TO_HOST_16(header->sentTime);
  2051. switch (peer->state) {
  2052. case ENET_PEER_STATE_DISCONNECTING:
  2053. case ENET_PEER_STATE_ACKNOWLEDGING_CONNECT:
  2054. case ENET_PEER_STATE_DISCONNECTED:
  2055. case ENET_PEER_STATE_ZOMBIE:
  2056. break;
  2057. case ENET_PEER_STATE_ACKNOWLEDGING_DISCONNECT:
  2058. if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_DISCONNECT)
  2059. enet_peer_queue_acknowledgement(peer, command, sentTime);
  2060. break;
  2061. default:
  2062. enet_peer_queue_acknowledgement(peer, command, sentTime);
  2063. break;
  2064. }
  2065. }
  2066. }
  2067. commandError:
  2068. if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
  2069. return 1;
  2070. return 0;
  2071. }
  2072. static int enet_protocol_receive_incoming_commands(ENetHost* host, ENetEvent* event) {
  2073. int packets;
  2074. for (packets = 0; packets < 256; ++packets) {
  2075. int receivedLength;
  2076. ENetBuffer buffer;
  2077. buffer.data = host->packetData[0];
  2078. buffer.dataLength = host->mtu;
  2079. receivedLength = enet_socket_receive(host->socket, &host->receivedAddress, &buffer, 1);
  2080. if (receivedLength == -2)
  2081. continue;
  2082. if (receivedLength < 0) {
  2083. ENET_LOG_ERROR("received length was negative: %i", receivedLength);
  2084. return ENET_PACKET_DATA_LENGTH_NEGATIVE;
  2085. }
  2086. if (receivedLength == 0)
  2087. return 0;
  2088. host->receivedData = host->packetData[0];
  2089. host->receivedDataLength = receivedLength;
  2090. host->totalReceivedData += receivedLength;
  2091. host->totalReceivedPackets++;
  2092. if (host->interceptCallback != NULL) {
  2093. switch (host->interceptCallback(host, (void*)event)) {
  2094. case 1:
  2095. if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
  2096. return 1;
  2097. continue;
  2098. case -1:
  2099. ENET_LOG_ERROR("intercept callback failure");
  2100. return ENET_HOST_INTERCEPT_FAILURE;
  2101. default:
  2102. break;
  2103. }
  2104. }
  2105. switch (enet_protocol_handle_incoming_commands(host, event)) {
  2106. case 1:
  2107. return 1;
  2108. case -1:
  2109. ENET_LOG_ERROR("enet_protocol_handle_incoming_commands failure");
  2110. return ENET_PEER_QUEUE_INCOMING_FAILURE;
  2111. default:
  2112. break;
  2113. }
  2114. }
  2115. return -1;
  2116. }
  2117. static void enet_protocol_send_acknowledgements(ENetHost* host, ENetPeer* peer) {
  2118. ENetProtocol* command = &host->commands[host->commandCount];
  2119. ENetBuffer* buffer = &host->buffers[host->bufferCount];
  2120. ENetAcknowledgement* acknowledgement;
  2121. ENetListIterator currentAcknowledgement;
  2122. enet_uint16 reliableSequenceNumber;
  2123. currentAcknowledgement = enet_list_begin(&peer->acknowledgements);
  2124. while (currentAcknowledgement != enet_list_end(&peer->acknowledgements)) {
  2125. if (command >= &host->commands[sizeof(host->commands) / sizeof(ENetProtocol)] || buffer >= &host->buffers[sizeof(host->buffers) / sizeof(ENetBuffer)] || peer->mtu - host->packetSize < sizeof(ENetProtocolAcknowledge)) {
  2126. host->continueSending = 1;
  2127. break;
  2128. }
  2129. acknowledgement = (ENetAcknowledgement*)currentAcknowledgement;
  2130. currentAcknowledgement = enet_list_next(currentAcknowledgement);
  2131. buffer->data = command;
  2132. buffer->dataLength = sizeof(ENetProtocolAcknowledge);
  2133. host->packetSize += buffer->dataLength;
  2134. reliableSequenceNumber = ENET_HOST_TO_NET_16(acknowledgement->command.header.reliableSequenceNumber);
  2135. command->header.command = ENET_PROTOCOL_COMMAND_ACKNOWLEDGE;
  2136. command->header.channelID = acknowledgement->command.header.channelID;
  2137. command->header.reliableSequenceNumber = reliableSequenceNumber;
  2138. command->acknowledge.receivedReliableSequenceNumber = reliableSequenceNumber;
  2139. command->acknowledge.receivedSentTime = ENET_HOST_TO_NET_16(acknowledgement->sentTime);
  2140. if ((acknowledgement->command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_DISCONNECT)
  2141. enet_protocol_dispatch_state(host, peer, ENET_PEER_STATE_ZOMBIE);
  2142. enet_list_remove(&acknowledgement->acknowledgementList);
  2143. enet_free(acknowledgement);
  2144. ++command;
  2145. ++buffer;
  2146. }
  2147. host->commandCount = command - host->commands;
  2148. host->bufferCount = buffer - host->buffers;
  2149. }
  2150. static void enet_protocol_send_unreliable_outgoing_commands(ENetHost* host, ENetPeer* peer) {
  2151. ENetProtocol* command = &host->commands[host->commandCount];
  2152. ENetBuffer* buffer = &host->buffers[host->bufferCount];
  2153. ENetOutgoingCommand* outgoingCommand;
  2154. ENetListIterator currentCommand;
  2155. currentCommand = enet_list_begin(&peer->outgoingUnreliableCommands);
  2156. while (currentCommand != enet_list_end(&peer->outgoingUnreliableCommands)) {
  2157. size_t commandSize;
  2158. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2159. commandSize = commandSizes[outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK];
  2160. 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 && peer->mtu - host->packetSize < commandSize + outgoingCommand->fragmentLength)) {
  2161. host->continueSending = 1;
  2162. break;
  2163. }
  2164. currentCommand = enet_list_next(currentCommand);
  2165. if (outgoingCommand->packet != NULL && outgoingCommand->fragmentOffset == 0) {
  2166. peer->packetThrottleCounter += ENET_PEER_PACKET_THROTTLE_COUNTER;
  2167. peer->packetThrottleCounter %= ENET_PEER_PACKET_THROTTLE_SCALE;
  2168. if (peer->packetThrottleCounter > peer->packetThrottle) {
  2169. enet_uint16 reliableSequenceNumber = outgoingCommand->reliableSequenceNumber;
  2170. enet_uint16 unreliableSequenceNumber = outgoingCommand->unreliableSequenceNumber;
  2171. for (;;) {
  2172. --outgoingCommand->packet->referenceCount;
  2173. if (outgoingCommand->packet->referenceCount == 0)
  2174. enet_packet_destroy(outgoingCommand->packet);
  2175. enet_list_remove(&outgoingCommand->outgoingCommandList);
  2176. enet_free(outgoingCommand);
  2177. if (currentCommand == enet_list_end(&peer->outgoingUnreliableCommands))
  2178. break;
  2179. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2180. if (outgoingCommand->reliableSequenceNumber != reliableSequenceNumber || outgoingCommand->unreliableSequenceNumber != unreliableSequenceNumber)
  2181. break;
  2182. currentCommand = enet_list_next(currentCommand);
  2183. }
  2184. continue;
  2185. }
  2186. }
  2187. buffer->data = command;
  2188. buffer->dataLength = commandSize;
  2189. host->packetSize += buffer->dataLength;
  2190. *command = outgoingCommand->command;
  2191. enet_list_remove(&outgoingCommand->outgoingCommandList);
  2192. if (outgoingCommand->packet != NULL) {
  2193. ++buffer;
  2194. buffer->data = outgoingCommand->packet->data + outgoingCommand->fragmentOffset;
  2195. buffer->dataLength = outgoingCommand->fragmentLength;
  2196. host->packetSize += buffer->dataLength;
  2197. enet_list_insert(enet_list_end(&peer->sentUnreliableCommands), outgoingCommand);
  2198. }
  2199. else {
  2200. enet_free(outgoingCommand);
  2201. }
  2202. ++command;
  2203. ++buffer;
  2204. }
  2205. host->commandCount = command - host->commands;
  2206. host->bufferCount = buffer - host->buffers;
  2207. if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER && enet_list_empty(&peer->outgoingReliableCommands) && enet_list_empty(&peer->outgoingUnreliableCommands) && enet_list_empty(&peer->sentReliableCommands) && enet_list_empty(&peer->sentUnreliableCommands))
  2208. enet_peer_disconnect(peer, peer->eventData);
  2209. }
  2210. static int enet_protocol_check_timeouts(ENetHost* host, ENetPeer* peer, ENetEvent* event) {
  2211. ENetOutgoingCommand* outgoingCommand;
  2212. ENetListIterator currentCommand, insertPosition;
  2213. currentCommand = enet_list_begin(&peer->sentReliableCommands);
  2214. insertPosition = enet_list_begin(&peer->outgoingReliableCommands);
  2215. while (currentCommand != enet_list_end(&peer->sentReliableCommands)) {
  2216. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2217. currentCommand = enet_list_next(currentCommand);
  2218. if (ENET_TIME_DIFFERENCE(host->serviceTime, outgoingCommand->sentTime) < outgoingCommand->roundTripTimeout)
  2219. continue;
  2220. if (peer->earliestTimeout == 0 || ENET_TIME_LESS(outgoingCommand->sentTime, peer->earliestTimeout))
  2221. peer->earliestTimeout = outgoingCommand->sentTime;
  2222. 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))) {
  2223. enet_protocol_notify_disconnect_timeout(host, peer, event);
  2224. return 1;
  2225. }
  2226. if (outgoingCommand->packet != NULL)
  2227. peer->reliableDataInTransit -= outgoingCommand->fragmentLength;
  2228. ++peer->packetsLost;
  2229. ++peer->totalPacketsLost;
  2230. outgoingCommand->roundTripTimeout = peer->roundTripTime + 4 * peer->roundTripTimeVariance;
  2231. outgoingCommand->roundTripTimeoutLimit = peer->timeoutLimit * outgoingCommand->roundTripTimeout;
  2232. enet_list_insert(insertPosition, enet_list_remove(&outgoingCommand->outgoingCommandList));
  2233. if (currentCommand == enet_list_begin(&peer->sentReliableCommands) && !enet_list_empty(&peer->sentReliableCommands)) {
  2234. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2235. peer->nextTimeout = outgoingCommand->sentTime + outgoingCommand->roundTripTimeout;
  2236. }
  2237. }
  2238. return 0;
  2239. }
  2240. static int enet_protocol_send_reliable_outgoing_commands(ENetHost* host, ENetPeer* peer) {
  2241. ENetProtocol* command = &host->commands[host->commandCount];
  2242. ENetBuffer* buffer = &host->buffers[host->bufferCount];
  2243. ENetOutgoingCommand* outgoingCommand;
  2244. ENetListIterator currentCommand;
  2245. ENetChannel* channel;
  2246. enet_uint16 reliableWindow;
  2247. size_t commandSize;
  2248. int windowExceeded = 0, windowWrap = 0, canPing = 1;
  2249. currentCommand = enet_list_begin(&peer->outgoingReliableCommands);
  2250. while (currentCommand != enet_list_end(&peer->outgoingReliableCommands)) {
  2251. outgoingCommand = (ENetOutgoingCommand*)currentCommand;
  2252. channel = outgoingCommand->command.header.channelID < peer->channelCount ? &peer->channels[outgoingCommand->command.header.channelID] : NULL;
  2253. reliableWindow = outgoingCommand->reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2254. if (channel != NULL) {
  2255. 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)))))
  2256. windowWrap = 1;
  2257. if (windowWrap) {
  2258. currentCommand = enet_list_next(currentCommand);
  2259. continue;
  2260. }
  2261. }
  2262. if (outgoingCommand->packet != NULL) {
  2263. if (!windowExceeded) {
  2264. enet_uint32 windowSize = (peer->packetThrottle * peer->windowSize) / ENET_PEER_PACKET_THROTTLE_SCALE;
  2265. if (peer->reliableDataInTransit + outgoingCommand->fragmentLength > ENET_MAX(windowSize, peer->mtu))
  2266. windowExceeded = 1;
  2267. }
  2268. if (windowExceeded) {
  2269. currentCommand = enet_list_next(currentCommand);
  2270. continue;
  2271. }
  2272. }
  2273. canPing = 0;
  2274. commandSize = commandSizes[outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK];
  2275. 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 && (enet_uint16)(peer->mtu - host->packetSize) < (enet_uint16)(commandSize + outgoingCommand->fragmentLength))) {
  2276. host->continueSending = 1;
  2277. break;
  2278. }
  2279. currentCommand = enet_list_next(currentCommand);
  2280. if (channel != NULL && outgoingCommand->sendAttempts < 1) {
  2281. channel->usedReliableWindows |= 1 << reliableWindow;
  2282. ++channel->reliableWindows[reliableWindow];
  2283. }
  2284. ++outgoingCommand->sendAttempts;
  2285. if (outgoingCommand->roundTripTimeout == 0) {
  2286. outgoingCommand->roundTripTimeout = peer->roundTripTime + 4 * peer->roundTripTimeVariance;
  2287. outgoingCommand->roundTripTimeoutLimit = peer->timeoutLimit * outgoingCommand->roundTripTimeout;
  2288. }
  2289. if (enet_list_empty(&peer->sentReliableCommands))
  2290. peer->nextTimeout = host->serviceTime + outgoingCommand->roundTripTimeout;
  2291. enet_list_insert(enet_list_end(&peer->sentReliableCommands), enet_list_remove(&outgoingCommand->outgoingCommandList));
  2292. outgoingCommand->sentTime = host->serviceTime;
  2293. buffer->data = command;
  2294. buffer->dataLength = commandSize;
  2295. host->packetSize += buffer->dataLength;
  2296. host->headerFlags |= ENET_PROTOCOL_HEADER_FLAG_SENT_TIME;
  2297. *command = outgoingCommand->command;
  2298. if (outgoingCommand->packet != NULL) {
  2299. ++buffer;
  2300. buffer->data = outgoingCommand->packet->data + outgoingCommand->fragmentOffset;
  2301. buffer->dataLength = outgoingCommand->fragmentLength;
  2302. host->packetSize += outgoingCommand->fragmentLength;
  2303. peer->reliableDataInTransit += outgoingCommand->fragmentLength;
  2304. }
  2305. ++peer->packetsSent;
  2306. ++peer->totalPacketsSent;
  2307. ++command;
  2308. ++buffer;
  2309. }
  2310. host->commandCount = command - host->commands;
  2311. host->bufferCount = buffer - host->buffers;
  2312. return canPing;
  2313. }
  2314. static int enet_protocol_send_outgoing_commands(ENetHost* host, ENetEvent* event, int checkForTimeouts) {
  2315. enet_uint8 headerData[sizeof(ENetProtocolHeader) + sizeof(enet_uint32)];
  2316. ENetProtocolHeader* header = (ENetProtocolHeader*)headerData;
  2317. ENetPeer* currentPeer;
  2318. int sentLength;
  2319. host->continueSending = 1;
  2320. while (host->continueSending) {
  2321. for (host->continueSending = 0, currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  2322. if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED || currentPeer->state == ENET_PEER_STATE_ZOMBIE)
  2323. continue;
  2324. host->headerFlags = 0;
  2325. host->commandCount = 0;
  2326. host->bufferCount = 1;
  2327. host->packetSize = sizeof(ENetProtocolHeader);
  2328. if (!enet_list_empty(&currentPeer->acknowledgements))
  2329. enet_protocol_send_acknowledgements(host, currentPeer);
  2330. if (checkForTimeouts != 0 && !enet_list_empty(&currentPeer->sentReliableCommands) && ENET_TIME_GREATER_EQUAL(host->serviceTime, currentPeer->nextTimeout) && enet_protocol_check_timeouts(host, currentPeer, event) == 1) {
  2331. if (event != NULL && event->type != ENET_EVENT_TYPE_NONE)
  2332. return 1;
  2333. else
  2334. continue;
  2335. }
  2336. if ((enet_list_empty(&currentPeer->outgoingReliableCommands) || enet_protocol_send_reliable_outgoing_commands(host, currentPeer)) && enet_list_empty(&currentPeer->sentReliableCommands) && ENET_TIME_DIFFERENCE(host->serviceTime, currentPeer->lastReceiveTime) >= currentPeer->pingInterval && currentPeer->mtu - host->packetSize >= sizeof(ENetProtocolPing)) {
  2337. enet_peer_ping(currentPeer);
  2338. enet_protocol_send_reliable_outgoing_commands(host, currentPeer);
  2339. }
  2340. if (!enet_list_empty(&currentPeer->outgoingUnreliableCommands))
  2341. enet_protocol_send_unreliable_outgoing_commands(host, currentPeer);
  2342. if (host->commandCount == 0)
  2343. continue;
  2344. if (currentPeer->packetLossEpoch == 0) {
  2345. currentPeer->packetLossEpoch = host->serviceTime;
  2346. }
  2347. else if (ENET_TIME_DIFFERENCE(host->serviceTime, currentPeer->packetLossEpoch) >= ENET_PEER_PACKET_LOSS_INTERVAL && currentPeer->packetsSent > 0) {
  2348. enet_uint32 packetLoss = currentPeer->packetsLost * ENET_PEER_PACKET_LOSS_SCALE / currentPeer->packetsSent;
  2349. ENET_LOG_TRACE(
  2350. "peer %u: %3.3f%% (+-%3.3f%%) pkt loss, %u ms RTT (+-%u ms Jitter), %3.2f%% throttle, reliable list sizes: %u/%u out, %u/%u in\n", currentPeer->incomingPeerID,
  2351. (currentPeer->packetLoss / (float)ENET_PEER_PACKET_LOSS_SCALE) * 100,
  2352. (currentPeer->packetLossVariance / (float)ENET_PEER_PACKET_LOSS_SCALE) * 100, currentPeer->roundTripTime, currentPeer->roundTripTimeVariance,
  2353. (currentPeer->packetThrottle / (float)ENET_PEER_PACKET_THROTTLE_SCALE) * 100,
  2354. enet_list_size(&currentPeer->outgoingReliableCommands),
  2355. enet_list_size(&currentPeer->outgoingUnreliableCommands),
  2356. currentPeer->channels != NULL ? enet_list_size(&currentPeer->channels->incomingReliableCommands) : 0,
  2357. currentPeer->channels != NULL ? enet_list_size(&currentPeer->channels->incomingUnreliableCommands) : 0
  2358. );
  2359. currentPeer->packetLossVariance -= currentPeer->packetLossVariance / 4;
  2360. if (packetLoss >= currentPeer->packetLoss) {
  2361. currentPeer->packetLoss += (packetLoss - currentPeer->packetLoss) / 8;
  2362. currentPeer->packetLossVariance += (packetLoss - currentPeer->packetLoss) / 4;
  2363. }
  2364. else {
  2365. currentPeer->packetLoss -= (currentPeer->packetLoss - packetLoss) / 8;
  2366. currentPeer->packetLossVariance += (currentPeer->packetLoss - packetLoss) / 4;
  2367. }
  2368. currentPeer->packetLossEpoch = host->serviceTime;
  2369. currentPeer->packetsSent = 0;
  2370. currentPeer->packetsLost = 0;
  2371. }
  2372. host->buffers->data = headerData;
  2373. if (host->headerFlags & ENET_PROTOCOL_HEADER_FLAG_SENT_TIME) {
  2374. header->sentTime = ENET_HOST_TO_NET_16(host->serviceTime & 0xFFFF);
  2375. host->buffers->dataLength = sizeof(ENetProtocolHeader);
  2376. }
  2377. else {
  2378. host->buffers->dataLength = (size_t) & ((ENetProtocolHeader*)0)->sentTime;
  2379. }
  2380. if (currentPeer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID)
  2381. host->headerFlags |= currentPeer->outgoingSessionID << ENET_PROTOCOL_HEADER_SESSION_SHIFT;
  2382. header->peerID = ENET_HOST_TO_NET_16(currentPeer->outgoingPeerID | host->headerFlags);
  2383. if (host->checksumCallback != NULL) {
  2384. enet_uint32* checksum = (enet_uint32*)&headerData[host->buffers->dataLength];
  2385. *checksum = currentPeer->outgoingPeerID < ENET_PROTOCOL_MAXIMUM_PEER_ID ? currentPeer->connectID : 0;
  2386. host->buffers->dataLength += sizeof(enet_uint32);
  2387. *checksum = host->checksumCallback(host->buffers, host->bufferCount);
  2388. }
  2389. currentPeer->lastSendTime = host->serviceTime;
  2390. sentLength = enet_socket_send(host->socket, &currentPeer->address, host->buffers, host->bufferCount);
  2391. enet_protocol_remove_sent_unreliable_commands(currentPeer);
  2392. if (sentLength < 0) {
  2393. ENET_LOG_ERROR("sentLength was negative: %i", sentLength);
  2394. return ENET_PACKET_DATA_LENGTH_NEGATIVE;
  2395. }
  2396. host->totalSentData += sentLength;
  2397. currentPeer->totalDataSent += sentLength;
  2398. host->totalSentPackets++;
  2399. }
  2400. }
  2401. return 0;
  2402. }
  2403. void enet_host_flush(ENetHost* host) {
  2404. host->serviceTime = enet_time_get();
  2405. enet_protocol_send_outgoing_commands(host, NULL, 0);
  2406. }
  2407. int enet_host_check_events(ENetHost* host, ENetEvent* event) {
  2408. if (event == NULL)
  2409. // Coburn: Probably not needed to put debug here?
  2410. return -1;
  2411. event->type = ENET_EVENT_TYPE_NONE;
  2412. event->peer = NULL;
  2413. event->packet = NULL;
  2414. return enet_protocol_dispatch_incoming_commands(host, event);
  2415. }
  2416. int enet_host_service(ENetHost* host, ENetEvent* event, enet_uint32 timeout) {
  2417. enet_uint32 waitCondition;
  2418. if (event != NULL) {
  2419. event->type = ENET_EVENT_TYPE_NONE;
  2420. event->peer = NULL;
  2421. event->packet = NULL;
  2422. switch (enet_protocol_dispatch_incoming_commands(host, event)) {
  2423. case 1:
  2424. return 1;
  2425. case -1:
  2426. ENET_LOG_ERROR("Error dispatching incoming packets");
  2427. return ENET_DISPATCH_INCOMING_FAILURE;
  2428. default:
  2429. break;
  2430. }
  2431. }
  2432. host->serviceTime = enet_time_get();
  2433. timeout += host->serviceTime;
  2434. do {
  2435. if (ENET_TIME_DIFFERENCE(host->serviceTime, host->bandwidthThrottleEpoch) >= ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL)
  2436. enet_host_bandwidth_throttle(host);
  2437. switch (enet_protocol_send_outgoing_commands(host, event, 1)) {
  2438. case 1:
  2439. return 1;
  2440. case -1:
  2441. ENET_LOG_ERROR("Error sending outgoing packets");
  2442. return ENET_SERVICE_SEND_OUTGOING_FAILURE;
  2443. default:
  2444. break;
  2445. }
  2446. switch (enet_protocol_receive_incoming_commands(host, event)) {
  2447. case 1:
  2448. return 1;
  2449. case -1:
  2450. ENET_LOG_ERROR("Error receiving incoming packets");
  2451. return ENET_SERVICE_RECEIVE_INCOMING_FAILURE;
  2452. default:
  2453. break;
  2454. }
  2455. switch (enet_protocol_send_outgoing_commands(host, event, 1)) {
  2456. case 1:
  2457. return 1;
  2458. case -1:
  2459. ENET_LOG_ERROR("Error dispatching outgoing packets!");
  2460. return ENET_DISPATCH_OUTGOING_FAILURE;
  2461. default:
  2462. break;
  2463. }
  2464. if (event != NULL) {
  2465. switch (enet_protocol_dispatch_incoming_commands(host, event)) {
  2466. case 1:
  2467. return 1;
  2468. case -1:
  2469. ENET_LOG_ERROR("Error dispatching incoming packets!");
  2470. return ENET_DISPATCH_INCOMING_FAILURE;
  2471. default:
  2472. break;
  2473. }
  2474. }
  2475. if (ENET_TIME_GREATER_EQUAL(host->serviceTime, timeout))
  2476. return 0;
  2477. do {
  2478. host->serviceTime = enet_time_get();
  2479. if (ENET_TIME_GREATER_EQUAL(host->serviceTime, timeout))
  2480. return 0;
  2481. waitCondition = ENET_SOCKET_WAIT_RECEIVE | ENET_SOCKET_WAIT_INTERRUPT;
  2482. if (enet_socket_wait(host->socket, &waitCondition, ENET_TIME_DIFFERENCE(timeout, host->serviceTime)) != 0)
  2483. // Coburn: Is this an error?
  2484. return -1;
  2485. }
  2486. while (waitCondition & ENET_SOCKET_WAIT_INTERRUPT);
  2487. host->serviceTime = enet_time_get();
  2488. }
  2489. while (waitCondition & ENET_SOCKET_WAIT_RECEIVE);
  2490. return 0;
  2491. }
  2492. /*
  2493. =======================================================================
  2494. Peer
  2495. =======================================================================
  2496. */
  2497. void enet_peer_throttle_configure(ENetPeer* peer, enet_uint32 interval, enet_uint32 acceleration, enet_uint32 deceleration, enet_uint32 threshold) {
  2498. ENetProtocol command;
  2499. peer->packetThrottleThreshold = threshold;
  2500. peer->packetThrottleInterval = interval;
  2501. peer->packetThrottleAcceleration = acceleration;
  2502. peer->packetThrottleDeceleration = deceleration;
  2503. command.header.command = ENET_PROTOCOL_COMMAND_THROTTLE_CONFIGURE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2504. command.header.channelID = 0xFF;
  2505. command.throttleConfigure.packetThrottleInterval = ENET_HOST_TO_NET_32(interval);
  2506. command.throttleConfigure.packetThrottleAcceleration = ENET_HOST_TO_NET_32(acceleration);
  2507. command.throttleConfigure.packetThrottleDeceleration = ENET_HOST_TO_NET_32(deceleration);
  2508. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2509. }
  2510. int enet_peer_throttle(ENetPeer* peer, enet_uint32 rtt) {
  2511. if (peer->lastRoundTripTime <= peer->lastRoundTripTimeVariance) {
  2512. peer->packetThrottle = peer->packetThrottleLimit;
  2513. }
  2514. else if (rtt < peer->lastRoundTripTime) {
  2515. peer->packetThrottle += peer->packetThrottleAcceleration;
  2516. if (peer->packetThrottle > peer->packetThrottleLimit)
  2517. peer->packetThrottle = peer->packetThrottleLimit;
  2518. return 1;
  2519. }
  2520. else if (rtt > peer->lastRoundTripTime + peer->packetThrottleThreshold + 2 * peer->lastRoundTripTimeVariance) {
  2521. if (peer->packetThrottle > peer->packetThrottleDeceleration)
  2522. peer->packetThrottle -= peer->packetThrottleDeceleration;
  2523. else
  2524. peer->packetThrottle = 0;
  2525. // Coburn: Not sure if this is an error condition
  2526. return -1;
  2527. }
  2528. return 0;
  2529. }
  2530. int enet_peer_send(ENetPeer* peer, enet_uint8 channelID, ENetPacket* packet) {
  2531. ENetChannel* channel = &peer->channels[channelID];
  2532. ENetProtocol command;
  2533. size_t fragmentLength;
  2534. if (peer->state != ENET_PEER_STATE_CONNECTED || channelID >= peer->channelCount || packet->dataLength > peer->host->maximumPacketSize) {
  2535. ENET_LOG_ERROR("Cannot send data. Peer is not connected, the channel id is above the maximum channels supported or the packet data length is above the maximum packet size");
  2536. return ENET_PEER_SENDFAIL_GENERIC;
  2537. }
  2538. fragmentLength = peer->mtu - sizeof(ENetProtocolHeader) - sizeof(ENetProtocolSendFragment);
  2539. if (peer->host->checksumCallback != NULL)
  2540. fragmentLength -= sizeof(enet_uint32);
  2541. if (packet->dataLength > fragmentLength) {
  2542. enet_uint32 fragmentCount = (packet->dataLength + fragmentLength - 1) / fragmentLength, fragmentNumber, fragmentOffset;
  2543. enet_uint8 commandNumber;
  2544. enet_uint16 startSequenceNumber;
  2545. ENetList fragments;
  2546. ENetOutgoingCommand* fragment;
  2547. if (fragmentCount > ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT) {
  2548. ENET_LOG_ERROR("Cannot send data. Too many fragments (%u vs %u)", fragmentCount, ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT);
  2549. return ENET_PEER_SENDFAIL_FRAGMENTOVERLOAD;
  2550. }
  2551. if ((packet->flags & (ENET_PACKET_FLAG_RELIABLE | ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED)) == ENET_PACKET_FLAG_UNRELIABLE_FRAGMENTED && channel->outgoingUnreliableSequenceNumber < 0xFFFF) {
  2552. commandNumber = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT;
  2553. startSequenceNumber = ENET_HOST_TO_NET_16(channel->outgoingUnreliableSequenceNumber + 1);
  2554. }
  2555. else {
  2556. commandNumber = ENET_PROTOCOL_COMMAND_SEND_FRAGMENT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2557. startSequenceNumber = ENET_HOST_TO_NET_16(channel->outgoingReliableSequenceNumber + 1);
  2558. }
  2559. enet_list_clear(&fragments);
  2560. for (fragmentNumber = 0, fragmentOffset = 0; fragmentOffset < packet->dataLength; ++fragmentNumber, fragmentOffset += fragmentLength) {
  2561. if (packet->dataLength - fragmentOffset < fragmentLength)
  2562. fragmentLength = packet->dataLength - fragmentOffset;
  2563. fragment = (ENetOutgoingCommand*)enet_malloc(sizeof(ENetOutgoingCommand));
  2564. if (fragment == NULL) {
  2565. while (!enet_list_empty(&fragments)) {
  2566. fragment = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(&fragments));
  2567. enet_free(fragment);
  2568. }
  2569. ENET_LOG_ERROR("Cannot send data. A fragment was null.");
  2570. return ENET_PEER_SENDFAIL_FRAGMENTNULL;
  2571. }
  2572. fragment->fragmentOffset = fragmentOffset;
  2573. fragment->fragmentLength = fragmentLength;
  2574. fragment->packet = packet;
  2575. fragment->command.header.command = commandNumber;
  2576. fragment->command.header.channelID = channelID;
  2577. fragment->command.sendFragment.startSequenceNumber = startSequenceNumber;
  2578. fragment->command.sendFragment.dataLength = ENET_HOST_TO_NET_16(fragmentLength);
  2579. fragment->command.sendFragment.fragmentCount = ENET_HOST_TO_NET_32(fragmentCount);
  2580. fragment->command.sendFragment.fragmentNumber = ENET_HOST_TO_NET_32(fragmentNumber);
  2581. fragment->command.sendFragment.totalLength = ENET_HOST_TO_NET_32(packet->dataLength);
  2582. fragment->command.sendFragment.fragmentOffset = ENET_NET_TO_HOST_32(fragmentOffset);
  2583. enet_list_insert(enet_list_end(&fragments), fragment);
  2584. }
  2585. packet->referenceCount += fragmentNumber;
  2586. while (!enet_list_empty(&fragments)) {
  2587. fragment = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(&fragments));
  2588. enet_peer_setup_outgoing_command(peer, fragment);
  2589. }
  2590. return 0;
  2591. }
  2592. command.header.channelID = channelID;
  2593. if ((packet->flags & (ENET_PACKET_FLAG_RELIABLE | ENET_PACKET_FLAG_UNSEQUENCED)) == ENET_PACKET_FLAG_UNSEQUENCED) {
  2594. command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
  2595. command.sendUnsequenced.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
  2596. }
  2597. else if (packet->flags & ENET_PACKET_FLAG_RELIABLE || channel->outgoingUnreliableSequenceNumber >= 0xFFFF) {
  2598. command.header.command = ENET_PROTOCOL_COMMAND_SEND_RELIABLE | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2599. command.sendReliable.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
  2600. }
  2601. else {
  2602. command.header.command = ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE;
  2603. command.sendUnreliable.dataLength = ENET_HOST_TO_NET_16(packet->dataLength);
  2604. }
  2605. if (enet_peer_queue_outgoing_command(peer, &command, packet, 0, packet->dataLength) == NULL) {
  2606. ENET_LOG_ERROR("a queued outgoing command was NULL");
  2607. return ENET_PEER_QUEUE_OUTGOING_NULL;
  2608. }
  2609. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  2610. enet_host_flush(peer->host);
  2611. return 0;
  2612. }
  2613. ENetPacket* enet_peer_receive(ENetPeer* peer, enet_uint8* channelID) {
  2614. ENetIncomingCommand* incomingCommand;
  2615. ENetPacket* packet;
  2616. if (enet_list_empty(&peer->dispatchedCommands))
  2617. return NULL;
  2618. incomingCommand = (ENetIncomingCommand*)enet_list_remove(enet_list_begin(&peer->dispatchedCommands));
  2619. if (channelID != NULL)
  2620. *channelID = incomingCommand->command.header.channelID;
  2621. packet = incomingCommand->packet;
  2622. --packet->referenceCount;
  2623. if (incomingCommand->fragments != NULL)
  2624. enet_free(incomingCommand->fragments);
  2625. enet_free(incomingCommand);
  2626. peer->totalWaitingData -= packet->dataLength;
  2627. return packet;
  2628. }
  2629. static void enet_peer_reset_outgoing_commands(ENetList* queue) {
  2630. ENetOutgoingCommand* outgoingCommand;
  2631. while (!enet_list_empty(queue)) {
  2632. outgoingCommand = (ENetOutgoingCommand*)enet_list_remove(enet_list_begin(queue));
  2633. if (outgoingCommand->packet != NULL) {
  2634. --outgoingCommand->packet->referenceCount;
  2635. if (outgoingCommand->packet->referenceCount == 0)
  2636. enet_packet_destroy(outgoingCommand->packet);
  2637. }
  2638. enet_free(outgoingCommand);
  2639. }
  2640. }
  2641. static void enet_peer_remove_incoming_commands(ENetList* queue, ENetListIterator startCommand, ENetListIterator endCommand) {
  2642. ENetListIterator currentCommand;
  2643. for (currentCommand = startCommand; currentCommand != endCommand;) {
  2644. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  2645. currentCommand = enet_list_next(currentCommand);
  2646. enet_list_remove(&incomingCommand->incomingCommandList);
  2647. if (incomingCommand->packet != NULL) {
  2648. --incomingCommand->packet->referenceCount;
  2649. if (incomingCommand->packet->referenceCount == 0)
  2650. enet_packet_destroy(incomingCommand->packet);
  2651. }
  2652. if (incomingCommand->fragments != NULL)
  2653. enet_free(incomingCommand->fragments);
  2654. enet_free(incomingCommand);
  2655. }
  2656. }
  2657. static void enet_peer_reset_incoming_commands(ENetList* queue) {
  2658. enet_peer_remove_incoming_commands(queue, enet_list_begin(queue), enet_list_end(queue));
  2659. }
  2660. void enet_peer_reset_queues(ENetPeer* peer) {
  2661. ENetChannel* channel;
  2662. if (peer->needsDispatch) {
  2663. enet_list_remove(&peer->dispatchList);
  2664. peer->needsDispatch = 0;
  2665. }
  2666. while (!enet_list_empty(&peer->acknowledgements)) {
  2667. enet_free(enet_list_remove(enet_list_begin(&peer->acknowledgements)));
  2668. }
  2669. enet_peer_reset_outgoing_commands(&peer->sentReliableCommands);
  2670. enet_peer_reset_outgoing_commands(&peer->sentUnreliableCommands);
  2671. enet_peer_reset_outgoing_commands(&peer->outgoingReliableCommands);
  2672. enet_peer_reset_outgoing_commands(&peer->outgoingUnreliableCommands);
  2673. enet_peer_reset_incoming_commands(&peer->dispatchedCommands);
  2674. if (peer->channels != NULL && peer->channelCount > 0) {
  2675. for (channel = peer->channels; channel < &peer->channels[peer->channelCount]; ++channel) {
  2676. enet_peer_reset_incoming_commands(&channel->incomingReliableCommands);
  2677. enet_peer_reset_incoming_commands(&channel->incomingUnreliableCommands);
  2678. }
  2679. enet_free(peer->channels);
  2680. }
  2681. peer->channels = NULL;
  2682. peer->channelCount = 0;
  2683. }
  2684. void enet_peer_on_connect(ENetPeer* peer) {
  2685. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) {
  2686. if (peer->incomingBandwidth != 0)
  2687. ++peer->host->bandwidthLimitedPeers;
  2688. ++peer->host->connectedPeers;
  2689. }
  2690. }
  2691. void enet_peer_on_disconnect(ENetPeer* peer) {
  2692. if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) {
  2693. if (peer->incomingBandwidth != 0)
  2694. --peer->host->bandwidthLimitedPeers;
  2695. --peer->host->connectedPeers;
  2696. }
  2697. }
  2698. void enet_peer_reset(ENetPeer* peer) {
  2699. enet_peer_on_disconnect(peer);
  2700. peer->outgoingPeerID = ENET_PROTOCOL_MAXIMUM_PEER_ID;
  2701. peer->state = ENET_PEER_STATE_DISCONNECTED;
  2702. peer->incomingBandwidth = 0;
  2703. peer->outgoingBandwidth = 0;
  2704. peer->incomingBandwidthThrottleEpoch = 0;
  2705. peer->outgoingBandwidthThrottleEpoch = 0;
  2706. peer->incomingDataTotal = 0;
  2707. peer->totalDataReceived = 0;
  2708. peer->outgoingDataTotal = 0;
  2709. peer->totalDataSent = 0;
  2710. peer->lastSendTime = 0;
  2711. peer->lastReceiveTime = 0;
  2712. peer->nextTimeout = 0;
  2713. peer->earliestTimeout = 0;
  2714. peer->packetLossEpoch = 0;
  2715. peer->packetsSent = 0;
  2716. peer->totalPacketsSent = 0;
  2717. peer->packetsLost = 0;
  2718. peer->totalPacketsLost = 0;
  2719. peer->packetLoss = 0;
  2720. peer->packetLossVariance = 0;
  2721. peer->packetThrottle = ENET_PEER_DEFAULT_PACKET_THROTTLE;
  2722. peer->packetThrottleThreshold = ENET_PEER_PACKET_THROTTLE_THRESHOLD;
  2723. peer->packetThrottleLimit = ENET_PEER_PACKET_THROTTLE_SCALE;
  2724. peer->packetThrottleCounter = 0;
  2725. peer->packetThrottleEpoch = 0;
  2726. peer->packetThrottleAcceleration = ENET_PEER_PACKET_THROTTLE_ACCELERATION;
  2727. peer->packetThrottleDeceleration = ENET_PEER_PACKET_THROTTLE_DECELERATION;
  2728. peer->packetThrottleInterval = ENET_PEER_PACKET_THROTTLE_INTERVAL;
  2729. peer->pingInterval = ENET_PEER_PING_INTERVAL;
  2730. peer->timeoutLimit = ENET_PEER_TIMEOUT_LIMIT;
  2731. peer->timeoutMinimum = ENET_PEER_TIMEOUT_MINIMUM;
  2732. peer->timeoutMaximum = ENET_PEER_TIMEOUT_MAXIMUM;
  2733. peer->smoothedRoundTripTime = 0;
  2734. peer->lastRoundTripTime = ENET_PEER_DEFAULT_ROUND_TRIP_TIME;
  2735. peer->lowestRoundTripTime = ENET_PEER_DEFAULT_ROUND_TRIP_TIME;
  2736. peer->lastRoundTripTimeVariance = 0;
  2737. peer->highestRoundTripTimeVariance = 0;
  2738. peer->roundTripTime = ENET_PEER_DEFAULT_ROUND_TRIP_TIME;
  2739. peer->roundTripTimeVariance = 0;
  2740. peer->mtu = peer->host->mtu;
  2741. peer->reliableDataInTransit = 0;
  2742. peer->outgoingReliableSequenceNumber = 0;
  2743. peer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  2744. peer->incomingUnsequencedGroup = 0;
  2745. peer->outgoingUnsequencedGroup = 0;
  2746. peer->eventData = 0;
  2747. peer->totalWaitingData = 0;
  2748. memset(peer->unsequencedWindow, 0, sizeof(peer->unsequencedWindow));
  2749. enet_peer_reset_queues(peer);
  2750. }
  2751. void enet_peer_ping(ENetPeer* peer) {
  2752. ENetProtocol command;
  2753. if (peer->state != ENET_PEER_STATE_CONNECTED)
  2754. return;
  2755. command.header.command = ENET_PROTOCOL_COMMAND_PING | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2756. command.header.channelID = 0xFF;
  2757. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2758. }
  2759. void enet_peer_ping_interval(ENetPeer* peer, enet_uint32 pingInterval) {
  2760. peer->pingInterval = pingInterval ? pingInterval : ENET_PEER_PING_INTERVAL;
  2761. }
  2762. void enet_peer_timeout(ENetPeer* peer, enet_uint32 timeoutLimit, enet_uint32 timeoutMinimum, enet_uint32 timeoutMaximum) {
  2763. peer->timeoutLimit = timeoutLimit ? timeoutLimit : ENET_PEER_TIMEOUT_LIMIT;
  2764. peer->timeoutMinimum = timeoutMinimum ? timeoutMinimum : ENET_PEER_TIMEOUT_MINIMUM;
  2765. peer->timeoutMaximum = timeoutMaximum ? timeoutMaximum : ENET_PEER_TIMEOUT_MAXIMUM;
  2766. }
  2767. void enet_peer_disconnect_now(ENetPeer* peer, enet_uint32 data) {
  2768. ENetProtocol command;
  2769. if (peer->state == ENET_PEER_STATE_DISCONNECTED)
  2770. return;
  2771. if (peer->state != ENET_PEER_STATE_ZOMBIE && peer->state != ENET_PEER_STATE_DISCONNECTING) {
  2772. enet_peer_reset_queues(peer);
  2773. command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT | ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
  2774. command.header.channelID = 0xFF;
  2775. command.disconnect.data = ENET_HOST_TO_NET_32(data);
  2776. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2777. enet_host_flush(peer->host);
  2778. }
  2779. enet_peer_reset(peer);
  2780. }
  2781. void enet_peer_disconnect(ENetPeer* peer, enet_uint32 data) {
  2782. ENetProtocol command;
  2783. 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)
  2784. return;
  2785. enet_peer_reset_queues(peer);
  2786. command.header.command = ENET_PROTOCOL_COMMAND_DISCONNECT;
  2787. command.header.channelID = 0xFF;
  2788. command.disconnect.data = ENET_HOST_TO_NET_32(data);
  2789. if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER)
  2790. command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  2791. else
  2792. command.header.command |= ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED;
  2793. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  2794. if (peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) {
  2795. enet_peer_on_disconnect(peer);
  2796. peer->state = ENET_PEER_STATE_DISCONNECTING;
  2797. }
  2798. else {
  2799. enet_host_flush(peer->host);
  2800. enet_peer_reset(peer);
  2801. }
  2802. }
  2803. void enet_peer_disconnect_later(ENetPeer* peer, enet_uint32 data) {
  2804. if ((peer->state == ENET_PEER_STATE_CONNECTED || peer->state == ENET_PEER_STATE_DISCONNECT_LATER) && !(enet_list_empty(&peer->outgoingReliableCommands) && enet_list_empty(&peer->outgoingUnreliableCommands) && enet_list_empty(&peer->sentReliableCommands))) {
  2805. peer->state = ENET_PEER_STATE_DISCONNECT_LATER;
  2806. peer->eventData = data;
  2807. }
  2808. else {
  2809. enet_peer_disconnect(peer, data);
  2810. }
  2811. }
  2812. ENetAcknowledgement* enet_peer_queue_acknowledgement(ENetPeer* peer, const ENetProtocol* command, enet_uint16 sentTime) {
  2813. ENetAcknowledgement* acknowledgement;
  2814. if (command->header.channelID < peer->channelCount) {
  2815. ENetChannel* channel = &peer->channels[command->header.channelID];
  2816. enet_uint16 reliableWindow = command->header.reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2817. enet_uint16 currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2818. if (command->header.reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2819. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  2820. if (reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1 && reliableWindow <= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS)
  2821. return NULL;
  2822. }
  2823. acknowledgement = (ENetAcknowledgement*)enet_malloc(sizeof(ENetAcknowledgement));
  2824. if (acknowledgement == NULL)
  2825. return NULL;
  2826. peer->outgoingDataTotal += sizeof(ENetProtocolAcknowledge);
  2827. acknowledgement->sentTime = sentTime;
  2828. acknowledgement->command = *command;
  2829. enet_list_insert(enet_list_end(&peer->acknowledgements), acknowledgement);
  2830. return acknowledgement;
  2831. }
  2832. void enet_peer_setup_outgoing_command(ENetPeer* peer, ENetOutgoingCommand* outgoingCommand) {
  2833. ENetChannel* channel = &peer->channels[outgoingCommand->command.header.channelID];
  2834. peer->outgoingDataTotal += enet_protocol_command_size(outgoingCommand->command.header.command) + outgoingCommand->fragmentLength;
  2835. if (outgoingCommand->command.header.channelID == 0xFF) {
  2836. ++peer->outgoingReliableSequenceNumber;
  2837. outgoingCommand->reliableSequenceNumber = peer->outgoingReliableSequenceNumber;
  2838. outgoingCommand->unreliableSequenceNumber = 0;
  2839. }
  2840. else if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE) {
  2841. ++channel->outgoingReliableSequenceNumber;
  2842. channel->outgoingUnreliableSequenceNumber = 0;
  2843. outgoingCommand->reliableSequenceNumber = channel->outgoingReliableSequenceNumber;
  2844. outgoingCommand->unreliableSequenceNumber = 0;
  2845. }
  2846. else if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_UNSEQUENCED) {
  2847. ++peer->outgoingUnsequencedGroup;
  2848. outgoingCommand->reliableSequenceNumber = 0;
  2849. outgoingCommand->unreliableSequenceNumber = 0;
  2850. }
  2851. else {
  2852. if (outgoingCommand->fragmentOffset == 0)
  2853. ++channel->outgoingUnreliableSequenceNumber;
  2854. outgoingCommand->reliableSequenceNumber = channel->outgoingReliableSequenceNumber;
  2855. outgoingCommand->unreliableSequenceNumber = channel->outgoingUnreliableSequenceNumber;
  2856. }
  2857. outgoingCommand->sendAttempts = 0;
  2858. outgoingCommand->sentTime = 0;
  2859. outgoingCommand->roundTripTimeout = 0;
  2860. outgoingCommand->roundTripTimeoutLimit = 0;
  2861. outgoingCommand->command.header.reliableSequenceNumber = ENET_HOST_TO_NET_16(outgoingCommand->reliableSequenceNumber);
  2862. switch (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) {
  2863. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
  2864. outgoingCommand->command.sendUnreliable.unreliableSequenceNumber = ENET_HOST_TO_NET_16(outgoingCommand->unreliableSequenceNumber);
  2865. break;
  2866. case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
  2867. outgoingCommand->command.sendUnsequenced.unsequencedGroup = ENET_HOST_TO_NET_16(peer->outgoingUnsequencedGroup);
  2868. break;
  2869. default:
  2870. break;
  2871. }
  2872. if (outgoingCommand->command.header.command & ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE)
  2873. enet_list_insert(enet_list_end(&peer->outgoingReliableCommands), outgoingCommand);
  2874. else
  2875. enet_list_insert(enet_list_end(&peer->outgoingUnreliableCommands), outgoingCommand);
  2876. }
  2877. ENetOutgoingCommand* enet_peer_queue_outgoing_command(ENetPeer* peer, const ENetProtocol* command, ENetPacket* packet, enet_uint32 offset, enet_uint16 length) {
  2878. ENetOutgoingCommand* outgoingCommand = (ENetOutgoingCommand*)enet_malloc(sizeof(ENetOutgoingCommand));
  2879. if (outgoingCommand == NULL)
  2880. return NULL;
  2881. outgoingCommand->command = *command;
  2882. outgoingCommand->fragmentOffset = offset;
  2883. outgoingCommand->fragmentLength = length;
  2884. outgoingCommand->packet = packet;
  2885. if (packet != NULL)
  2886. ++packet->referenceCount;
  2887. enet_peer_setup_outgoing_command(peer, outgoingCommand);
  2888. return outgoingCommand;
  2889. }
  2890. void enet_peer_dispatch_incoming_unreliable_commands(ENetPeer* peer, ENetChannel* channel) {
  2891. ENetListIterator droppedCommand, startCommand, currentCommand;
  2892. for (droppedCommand = startCommand = currentCommand = enet_list_begin(&channel->incomingUnreliableCommands); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_next(currentCommand)) {
  2893. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  2894. if ((incomingCommand->command.header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
  2895. continue;
  2896. if (incomingCommand->reliableSequenceNumber == channel->incomingReliableSequenceNumber) {
  2897. if (incomingCommand->fragmentsRemaining <= 0) {
  2898. channel->incomingUnreliableSequenceNumber = incomingCommand->unreliableSequenceNumber;
  2899. continue;
  2900. }
  2901. if (startCommand != currentCommand) {
  2902. enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
  2903. if (!peer->needsDispatch) {
  2904. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2905. peer->needsDispatch = 1;
  2906. }
  2907. droppedCommand = currentCommand;
  2908. }
  2909. else if (droppedCommand != currentCommand)
  2910. droppedCommand = enet_list_previous(currentCommand);
  2911. }
  2912. else {
  2913. enet_uint16 reliableWindow = incomingCommand->reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2914. enet_uint16 currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2915. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2916. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  2917. if (reliableWindow >= currentWindow && reliableWindow < currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  2918. break;
  2919. droppedCommand = enet_list_next(currentCommand);
  2920. if (startCommand != currentCommand) {
  2921. enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
  2922. if (!peer->needsDispatch) {
  2923. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2924. peer->needsDispatch = 1;
  2925. }
  2926. }
  2927. }
  2928. startCommand = enet_list_next(currentCommand);
  2929. }
  2930. if (startCommand != currentCommand) {
  2931. enet_list_move(enet_list_end(&peer->dispatchedCommands), startCommand, enet_list_previous(currentCommand));
  2932. if (!peer->needsDispatch) {
  2933. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2934. peer->needsDispatch = 1;
  2935. }
  2936. droppedCommand = currentCommand;
  2937. }
  2938. enet_peer_remove_incoming_commands(&channel->incomingUnreliableCommands, enet_list_begin(&channel->incomingUnreliableCommands), droppedCommand);
  2939. }
  2940. void enet_peer_dispatch_incoming_reliable_commands(ENetPeer* peer, ENetChannel* channel) {
  2941. ENetListIterator currentCommand;
  2942. for (currentCommand = enet_list_begin(&channel->incomingReliableCommands); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_next(currentCommand)) {
  2943. ENetIncomingCommand* incomingCommand = (ENetIncomingCommand*)currentCommand;
  2944. if (incomingCommand->fragmentsRemaining > 0 || incomingCommand->reliableSequenceNumber != (enet_uint16)(channel->incomingReliableSequenceNumber + 1))
  2945. break;
  2946. channel->incomingReliableSequenceNumber = incomingCommand->reliableSequenceNumber;
  2947. if (incomingCommand->fragmentCount > 0)
  2948. channel->incomingReliableSequenceNumber += incomingCommand->fragmentCount - 1;
  2949. }
  2950. if (currentCommand == enet_list_begin(&channel->incomingReliableCommands))
  2951. return;
  2952. channel->incomingUnreliableSequenceNumber = 0;
  2953. enet_list_move(enet_list_end(&peer->dispatchedCommands), enet_list_begin(&channel->incomingReliableCommands), enet_list_previous(currentCommand));
  2954. if (!peer->needsDispatch) {
  2955. enet_list_insert(enet_list_end(&peer->host->dispatchQueue), &peer->dispatchList);
  2956. peer->needsDispatch = 1;
  2957. }
  2958. if (!enet_list_empty(&channel->incomingUnreliableCommands))
  2959. enet_peer_dispatch_incoming_unreliable_commands(peer, channel);
  2960. }
  2961. ENetIncomingCommand* enet_peer_queue_incoming_command(ENetPeer* peer, const ENetProtocol* command, const void* data, size_t dataLength, enet_uint32 flags, enet_uint32 fragmentCount) {
  2962. static ENetIncomingCommand dummyCommand;
  2963. ENetChannel* channel = &peer->channels[command->header.channelID];
  2964. enet_uint32 unreliableSequenceNumber = 0, reliableSequenceNumber = 0;
  2965. enet_uint16 reliableWindow, currentWindow;
  2966. ENetIncomingCommand* incomingCommand;
  2967. ENetListIterator currentCommand;
  2968. ENetPacket* packet = NULL;
  2969. if (peer->state == ENET_PEER_STATE_DISCONNECT_LATER)
  2970. goto discardCommand;
  2971. if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) != ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED) {
  2972. reliableSequenceNumber = command->header.reliableSequenceNumber;
  2973. reliableWindow = reliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2974. currentWindow = channel->incomingReliableSequenceNumber / ENET_PEER_RELIABLE_WINDOW_SIZE;
  2975. if (reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2976. reliableWindow += ENET_PEER_RELIABLE_WINDOWS;
  2977. if (reliableWindow < currentWindow || reliableWindow >= currentWindow + ENET_PEER_FREE_RELIABLE_WINDOWS - 1)
  2978. goto discardCommand;
  2979. }
  2980. switch (command->header.command & ENET_PROTOCOL_COMMAND_MASK) {
  2981. case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
  2982. case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
  2983. if (reliableSequenceNumber == channel->incomingReliableSequenceNumber)
  2984. goto discardCommand;
  2985. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingReliableCommands)); currentCommand != enet_list_end(&channel->incomingReliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  2986. incomingCommand = (ENetIncomingCommand*)currentCommand;
  2987. if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  2988. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  2989. continue;
  2990. }
  2991. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  2992. break;
  2993. }
  2994. if (incomingCommand->reliableSequenceNumber <= reliableSequenceNumber) {
  2995. if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
  2996. break;
  2997. goto discardCommand;
  2998. }
  2999. }
  3000. break;
  3001. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE:
  3002. case ENET_PROTOCOL_COMMAND_SEND_UNRELIABLE_FRAGMENT:
  3003. unreliableSequenceNumber = ENET_NET_TO_HOST_16(command->sendUnreliable.unreliableSequenceNumber);
  3004. if (reliableSequenceNumber == channel->incomingReliableSequenceNumber && unreliableSequenceNumber <= channel->incomingUnreliableSequenceNumber)
  3005. goto discardCommand;
  3006. for (currentCommand = enet_list_previous(enet_list_end(&channel->incomingUnreliableCommands)); currentCommand != enet_list_end(&channel->incomingUnreliableCommands); currentCommand = enet_list_previous(currentCommand)) {
  3007. incomingCommand = (ENetIncomingCommand*)currentCommand;
  3008. if ((command->header.command & ENET_PROTOCOL_COMMAND_MASK) == ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED)
  3009. continue;
  3010. if (reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  3011. if (incomingCommand->reliableSequenceNumber < channel->incomingReliableSequenceNumber)
  3012. continue;
  3013. }
  3014. else if (incomingCommand->reliableSequenceNumber >= channel->incomingReliableSequenceNumber) {
  3015. break;
  3016. }
  3017. if (incomingCommand->reliableSequenceNumber < reliableSequenceNumber)
  3018. break;
  3019. if (incomingCommand->reliableSequenceNumber > reliableSequenceNumber)
  3020. continue;
  3021. if (incomingCommand->unreliableSequenceNumber <= unreliableSequenceNumber) {
  3022. if (incomingCommand->unreliableSequenceNumber < unreliableSequenceNumber)
  3023. break;
  3024. goto discardCommand;
  3025. }
  3026. }
  3027. break;
  3028. case ENET_PROTOCOL_COMMAND_SEND_UNSEQUENCED:
  3029. currentCommand = enet_list_end(&channel->incomingUnreliableCommands);
  3030. break;
  3031. default:
  3032. goto discardCommand;
  3033. }
  3034. if (peer->totalWaitingData >= peer->host->maximumWaitingData)
  3035. goto notifyError;
  3036. packet = enet_packet_create(data, dataLength, flags);
  3037. if (packet == NULL)
  3038. goto notifyError;
  3039. incomingCommand = (ENetIncomingCommand*)enet_malloc(sizeof(ENetIncomingCommand));
  3040. if (incomingCommand == NULL)
  3041. goto notifyError;
  3042. incomingCommand->reliableSequenceNumber = command->header.reliableSequenceNumber;
  3043. incomingCommand->unreliableSequenceNumber = unreliableSequenceNumber & 0xFFFF;
  3044. incomingCommand->command = *command;
  3045. incomingCommand->fragmentCount = fragmentCount;
  3046. incomingCommand->fragmentsRemaining = fragmentCount;
  3047. incomingCommand->packet = packet;
  3048. incomingCommand->fragments = NULL;
  3049. if (fragmentCount > 0) {
  3050. if (fragmentCount <= ENET_PROTOCOL_MAXIMUM_FRAGMENT_COUNT)
  3051. incomingCommand->fragments = (enet_uint32*)enet_malloc((fragmentCount + 31) / 32 * sizeof(enet_uint32));
  3052. if (incomingCommand->fragments == NULL) {
  3053. enet_free(incomingCommand);
  3054. goto notifyError;
  3055. }
  3056. memset(incomingCommand->fragments, 0, (fragmentCount + 31) / 32 * sizeof(enet_uint32));
  3057. }
  3058. if (packet != NULL) {
  3059. ++packet->referenceCount;
  3060. peer->totalWaitingData += packet->dataLength;
  3061. }
  3062. enet_list_insert(enet_list_next(currentCommand), incomingCommand);
  3063. switch (command->header.command & ENET_PROTOCOL_COMMAND_MASK) {
  3064. case ENET_PROTOCOL_COMMAND_SEND_FRAGMENT:
  3065. case ENET_PROTOCOL_COMMAND_SEND_RELIABLE:
  3066. enet_peer_dispatch_incoming_reliable_commands(peer, channel);
  3067. break;
  3068. default:
  3069. enet_peer_dispatch_incoming_unreliable_commands(peer, channel);
  3070. break;
  3071. }
  3072. return incomingCommand;
  3073. discardCommand:
  3074. if (fragmentCount > 0)
  3075. goto notifyError;
  3076. if (packet != NULL && packet->referenceCount == 0)
  3077. enet_packet_destroy(packet);
  3078. return &dummyCommand;
  3079. notifyError:
  3080. if (packet != NULL && packet->referenceCount == 0)
  3081. enet_packet_destroy(packet);
  3082. return NULL;
  3083. }
  3084. /*
  3085. =======================================================================
  3086. Host
  3087. =======================================================================
  3088. */
  3089. ENetHost* enet_host_create(const ENetAddress* address, size_t peerCount, size_t channelLimit, enet_uint32 incomingBandwidth, enet_uint32 outgoingBandwidth, int bufferSize) {
  3090. ENetHost* host;
  3091. ENetPeer* currentPeer;
  3092. if (peerCount > ENET_PROTOCOL_MAXIMUM_PEER_ID)
  3093. return NULL;
  3094. host = (ENetHost*)enet_malloc(sizeof(ENetHost));
  3095. if (host == NULL)
  3096. return NULL;
  3097. memset(host, 0, sizeof(ENetHost));
  3098. host->peers = (ENetPeer*)enet_malloc(peerCount * sizeof(ENetPeer));
  3099. if (host->peers == NULL) {
  3100. enet_free(host);
  3101. return NULL;
  3102. }
  3103. memset(host->peers, 0, peerCount * sizeof(ENetPeer));
  3104. host->socket = enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
  3105. if (host->socket != ENET_SOCKET_NULL)
  3106. enet_socket_set_option(host->socket, ENET_SOCKOPT_IPV6_V6ONLY, 0);
  3107. if (host->socket == ENET_SOCKET_NULL || (address != NULL && enet_socket_bind(host->socket, address) < 0)) {
  3108. if (host->socket != ENET_SOCKET_NULL)
  3109. enet_socket_destroy(host->socket);
  3110. enet_free(host->peers);
  3111. enet_free(host);
  3112. return NULL;
  3113. }
  3114. if (bufferSize > ENET_HOST_BUFFER_SIZE_MAX)
  3115. bufferSize = ENET_HOST_BUFFER_SIZE_MAX;
  3116. else if (bufferSize < ENET_HOST_BUFFER_SIZE_MIN)
  3117. bufferSize = ENET_HOST_BUFFER_SIZE_MIN;
  3118. enet_socket_set_option(host->socket, ENET_SOCKOPT_NONBLOCK, 1);
  3119. enet_socket_set_option(host->socket, ENET_SOCKOPT_BROADCAST, 1);
  3120. enet_socket_set_option(host->socket, ENET_SOCKOPT_RCVBUF, bufferSize);
  3121. enet_socket_set_option(host->socket, ENET_SOCKOPT_SNDBUF, bufferSize);
  3122. if (address != NULL && enet_socket_get_address(host->socket, &host->address) < 0)
  3123. host->address = *address;
  3124. if (!channelLimit || channelLimit > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  3125. channelLimit = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
  3126. else if (channelLimit < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
  3127. channelLimit = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
  3128. host->randomSeed = (enet_uint32)(size_t)host;
  3129. host->randomSeed += enet_host_random_seed();
  3130. host->randomSeed = (host->randomSeed << 16) | (host->randomSeed >> 16);
  3131. host->channelLimit = channelLimit;
  3132. host->incomingBandwidth = incomingBandwidth;
  3133. host->outgoingBandwidth = outgoingBandwidth;
  3134. host->bandwidthThrottleEpoch = 0;
  3135. host->recalculateBandwidthLimits = 0;
  3136. host->preventConnections = 0;
  3137. host->mtu = ENET_HOST_DEFAULT_MTU;
  3138. host->peerCount = peerCount;
  3139. host->commandCount = 0;
  3140. host->bufferCount = 0;
  3141. host->compression = 0;
  3142. host->compressionBufferSize = 0;
  3143. host->checksumCallback = NULL;
  3144. host->receivedAddress.ipv6 = ENET_HOST_ANY;
  3145. host->receivedAddress.port = 0;
  3146. host->receivedData = NULL;
  3147. host->receivedDataLength = 0;
  3148. host->totalSentData = 0;
  3149. host->totalSentPackets = 0;
  3150. host->totalReceivedData = 0;
  3151. host->totalReceivedPackets = 0;
  3152. host->connectedPeers = 0;
  3153. host->bandwidthLimitedPeers = 0;
  3154. host->duplicatePeers = ENET_PROTOCOL_MAXIMUM_PEER_ID;
  3155. host->maximumPacketSize = ENET_HOST_DEFAULT_MAXIMUM_PACKET_SIZE;
  3156. host->maximumWaitingData = ENET_HOST_DEFAULT_MAXIMUM_WAITING_DATA;
  3157. host->interceptCallback = NULL;
  3158. enet_list_clear(&host->dispatchQueue);
  3159. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3160. currentPeer->host = host;
  3161. currentPeer->incomingPeerID = currentPeer - host->peers;
  3162. currentPeer->outgoingSessionID = currentPeer->incomingSessionID = 0xFF;
  3163. currentPeer->data = NULL;
  3164. enet_list_clear(&currentPeer->acknowledgements);
  3165. enet_list_clear(&currentPeer->sentReliableCommands);
  3166. enet_list_clear(&currentPeer->sentUnreliableCommands);
  3167. enet_list_clear(&currentPeer->outgoingReliableCommands);
  3168. enet_list_clear(&currentPeer->outgoingUnreliableCommands);
  3169. enet_list_clear(&currentPeer->dispatchedCommands);
  3170. enet_peer_reset(currentPeer);
  3171. }
  3172. ENET_LOG_TRACE("host created successfully\n");
  3173. return host;
  3174. }
  3175. void enet_host_destroy(ENetHost* host) {
  3176. ENetPeer* currentPeer;
  3177. if (host == NULL)
  3178. return;
  3179. enet_socket_destroy(host->socket);
  3180. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3181. enet_peer_reset(currentPeer);
  3182. }
  3183. enet_free(host->peers);
  3184. enet_free(host->compressionBuffer);
  3185. enet_free(host);
  3186. }
  3187. void enet_host_enable_compression(ENetHost* host) {
  3188. if (host == NULL)
  3189. return;
  3190. host->compression = 1;
  3191. }
  3192. void enet_host_prevent_connections(ENetHost* host, enet_uint8 state) {
  3193. if (host == NULL)
  3194. return;
  3195. host->preventConnections = state;
  3196. }
  3197. ENetPeer* enet_host_connect(ENetHost* host, const ENetAddress* address, size_t channelCount, enet_uint32 data) {
  3198. ENetPeer* currentPeer;
  3199. ENetChannel* channel;
  3200. ENetProtocol command;
  3201. if (channelCount < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
  3202. channelCount = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
  3203. else if (channelCount > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  3204. channelCount = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
  3205. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3206. if (currentPeer->state == ENET_PEER_STATE_DISCONNECTED)
  3207. break;
  3208. }
  3209. if (currentPeer >= &host->peers[host->peerCount])
  3210. return NULL;
  3211. currentPeer->channels = (ENetChannel*)enet_malloc(channelCount * sizeof(ENetChannel));
  3212. if (currentPeer->channels == NULL)
  3213. return NULL;
  3214. currentPeer->channelCount = channelCount;
  3215. currentPeer->state = ENET_PEER_STATE_CONNECTING;
  3216. currentPeer->address = *address;
  3217. currentPeer->connectID = ++host->randomSeed;
  3218. if (host->outgoingBandwidth == 0)
  3219. currentPeer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  3220. else
  3221. currentPeer->windowSize = (host->outgoingBandwidth / ENET_PEER_WINDOW_SIZE_SCALE) * ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  3222. if (currentPeer->windowSize < ENET_PROTOCOL_MINIMUM_WINDOW_SIZE)
  3223. currentPeer->windowSize = ENET_PROTOCOL_MINIMUM_WINDOW_SIZE;
  3224. else if (currentPeer->windowSize > ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE)
  3225. currentPeer->windowSize = ENET_PROTOCOL_MAXIMUM_WINDOW_SIZE;
  3226. for (channel = currentPeer->channels; channel < &currentPeer->channels[channelCount]; ++channel) {
  3227. channel->outgoingReliableSequenceNumber = 0;
  3228. channel->outgoingUnreliableSequenceNumber = 0;
  3229. channel->incomingReliableSequenceNumber = 0;
  3230. channel->incomingUnreliableSequenceNumber = 0;
  3231. enet_list_clear(&channel->incomingReliableCommands);
  3232. enet_list_clear(&channel->incomingUnreliableCommands);
  3233. channel->usedReliableWindows = 0;
  3234. memset(channel->reliableWindows, 0, sizeof(channel->reliableWindows));
  3235. }
  3236. command.header.command = ENET_PROTOCOL_COMMAND_CONNECT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  3237. command.header.channelID = 0xFF;
  3238. command.connect.outgoingPeerID = ENET_HOST_TO_NET_16(currentPeer->incomingPeerID);
  3239. command.connect.incomingSessionID = currentPeer->incomingSessionID;
  3240. command.connect.outgoingSessionID = currentPeer->outgoingSessionID;
  3241. command.connect.mtu = ENET_HOST_TO_NET_32(currentPeer->mtu);
  3242. command.connect.windowSize = ENET_HOST_TO_NET_32(currentPeer->windowSize);
  3243. command.connect.channelCount = ENET_HOST_TO_NET_32(channelCount);
  3244. command.connect.incomingBandwidth = ENET_HOST_TO_NET_32(host->incomingBandwidth);
  3245. command.connect.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
  3246. command.connect.packetThrottleInterval = ENET_HOST_TO_NET_32(currentPeer->packetThrottleInterval);
  3247. command.connect.packetThrottleAcceleration = ENET_HOST_TO_NET_32(currentPeer->packetThrottleAcceleration);
  3248. command.connect.packetThrottleDeceleration = ENET_HOST_TO_NET_32(currentPeer->packetThrottleDeceleration);
  3249. command.connect.connectID = currentPeer->connectID;
  3250. command.connect.data = ENET_HOST_TO_NET_32(data);
  3251. enet_peer_queue_outgoing_command(currentPeer, &command, NULL, 0, 0);
  3252. return currentPeer;
  3253. }
  3254. void enet_host_broadcast(ENetHost* host, enet_uint8 channelID, ENetPacket* packet) {
  3255. ENetPeer* currentPeer;
  3256. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3257. ++packet->referenceCount;
  3258. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3259. if (currentPeer->state != ENET_PEER_STATE_CONNECTED)
  3260. continue;
  3261. enet_peer_send(currentPeer, channelID, packet);
  3262. }
  3263. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3264. --packet->referenceCount;
  3265. if (packet->referenceCount == 0)
  3266. enet_packet_destroy(packet);
  3267. }
  3268. void enet_host_broadcast_exclude(ENetHost* host, enet_uint8 channelID, ENetPacket* packet, ENetPeer* excludedPeer) {
  3269. ENetPeer* currentPeer;
  3270. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3271. ++packet->referenceCount;
  3272. for (currentPeer = host->peers; currentPeer < &host->peers[host->peerCount]; ++currentPeer) {
  3273. if (currentPeer->state != ENET_PEER_STATE_CONNECTED || currentPeer == excludedPeer)
  3274. continue;
  3275. enet_peer_send(currentPeer, channelID, packet);
  3276. }
  3277. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3278. --packet->referenceCount;
  3279. if (packet->referenceCount == 0)
  3280. enet_packet_destroy(packet);
  3281. }
  3282. void enet_host_broadcast_selective(ENetHost* host, enet_uint8 channelID, ENetPacket* packet, ENetPeer** peers, size_t length) {
  3283. ENetPeer* currentPeer;
  3284. size_t i;
  3285. if (host == NULL)
  3286. return;
  3287. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3288. ++packet->referenceCount;
  3289. for (i = 0; i < length; i++) {
  3290. currentPeer = peers[i];
  3291. if (currentPeer == NULL || currentPeer->state != ENET_PEER_STATE_CONNECTED)
  3292. continue;
  3293. enet_peer_send(currentPeer, channelID, packet);
  3294. }
  3295. if (packet->flags & ENET_PACKET_FLAG_INSTANT)
  3296. --packet->referenceCount;
  3297. if (packet->referenceCount == 0)
  3298. enet_packet_destroy(packet);
  3299. }
  3300. void enet_host_channel_limit(ENetHost* host, size_t channelLimit) {
  3301. if (!channelLimit || channelLimit > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT)
  3302. channelLimit = ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT;
  3303. else if (channelLimit < ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT)
  3304. channelLimit = ENET_PROTOCOL_MINIMUM_CHANNEL_COUNT;
  3305. host->channelLimit = channelLimit;
  3306. }
  3307. void enet_host_bandwidth_limit(ENetHost* host, enet_uint32 incomingBandwidth, enet_uint32 outgoingBandwidth) {
  3308. host->incomingBandwidth = incomingBandwidth;
  3309. host->outgoingBandwidth = outgoingBandwidth;
  3310. host->recalculateBandwidthLimits = 1;
  3311. }
  3312. void enet_host_bandwidth_throttle(ENetHost* host) {
  3313. enet_uint32 timeCurrent = enet_time_get();
  3314. enet_uint32 elapsedTime = timeCurrent - host->bandwidthThrottleEpoch;
  3315. enet_uint32 peersRemaining = (enet_uint32)host->connectedPeers;
  3316. enet_uint32 dataTotal = ~0;
  3317. enet_uint32 bandwidth = ~0;
  3318. enet_uint32 throttle = 0;
  3319. enet_uint32 bandwidthLimit = 0;
  3320. int needsAdjustment = host->bandwidthLimitedPeers > 0 ? 1 : 0;
  3321. ENetPeer* peer;
  3322. ENetProtocol command;
  3323. if (elapsedTime < ENET_HOST_BANDWIDTH_THROTTLE_INTERVAL)
  3324. return;
  3325. if (host->outgoingBandwidth == 0 && host->incomingBandwidth == 0)
  3326. return;
  3327. host->bandwidthThrottleEpoch = timeCurrent;
  3328. if (peersRemaining == 0)
  3329. return;
  3330. if (host->outgoingBandwidth != 0) {
  3331. dataTotal = 0;
  3332. bandwidth = (host->outgoingBandwidth * elapsedTime) / 1000;
  3333. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3334. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
  3335. continue;
  3336. dataTotal += peer->outgoingDataTotal;
  3337. }
  3338. }
  3339. while (peersRemaining > 0 && needsAdjustment != 0) {
  3340. needsAdjustment = 0;
  3341. if (dataTotal <= bandwidth)
  3342. throttle = ENET_PEER_PACKET_THROTTLE_SCALE;
  3343. else
  3344. throttle = (bandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / dataTotal;
  3345. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3346. enet_uint32 peerBandwidth;
  3347. if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->incomingBandwidth == 0 || peer->outgoingBandwidthThrottleEpoch == timeCurrent)
  3348. continue;
  3349. peerBandwidth = (peer->incomingBandwidth * elapsedTime) / 1000;
  3350. if ((throttle * peer->outgoingDataTotal) / ENET_PEER_PACKET_THROTTLE_SCALE <= peerBandwidth)
  3351. continue;
  3352. peer->packetThrottleLimit = (peerBandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / peer->outgoingDataTotal;
  3353. if (peer->packetThrottleLimit == 0)
  3354. peer->packetThrottleLimit = 1;
  3355. if (peer->packetThrottle > peer->packetThrottleLimit)
  3356. peer->packetThrottle = peer->packetThrottleLimit;
  3357. peer->outgoingBandwidthThrottleEpoch = timeCurrent;
  3358. peer->incomingDataTotal = 0;
  3359. peer->outgoingDataTotal = 0;
  3360. needsAdjustment = 1;
  3361. --peersRemaining;
  3362. bandwidth -= peerBandwidth;
  3363. dataTotal -= peerBandwidth;
  3364. }
  3365. }
  3366. if (peersRemaining > 0) {
  3367. if (dataTotal <= bandwidth)
  3368. throttle = ENET_PEER_PACKET_THROTTLE_SCALE;
  3369. else
  3370. throttle = (bandwidth * ENET_PEER_PACKET_THROTTLE_SCALE) / dataTotal;
  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) || peer->outgoingBandwidthThrottleEpoch == timeCurrent)
  3373. continue;
  3374. peer->packetThrottleLimit = throttle;
  3375. if (peer->packetThrottle > peer->packetThrottleLimit)
  3376. peer->packetThrottle = peer->packetThrottleLimit;
  3377. peer->incomingDataTotal = 0;
  3378. peer->outgoingDataTotal = 0;
  3379. }
  3380. }
  3381. if (host->recalculateBandwidthLimits) {
  3382. host->recalculateBandwidthLimits = 0;
  3383. peersRemaining = (enet_uint32)host->connectedPeers;
  3384. bandwidth = host->incomingBandwidth;
  3385. needsAdjustment = 1;
  3386. if (bandwidth == 0) {
  3387. bandwidthLimit = 0;
  3388. }
  3389. else {
  3390. while (peersRemaining > 0 && needsAdjustment != 0) {
  3391. needsAdjustment = 0;
  3392. bandwidthLimit = bandwidth / peersRemaining;
  3393. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3394. if ((peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER) || peer->incomingBandwidthThrottleEpoch == timeCurrent)
  3395. continue;
  3396. if (peer->outgoingBandwidth > 0 && peer->outgoingBandwidth >= bandwidthLimit)
  3397. continue;
  3398. peer->incomingBandwidthThrottleEpoch = timeCurrent;
  3399. needsAdjustment = 1;
  3400. --peersRemaining;
  3401. bandwidth -= peer->outgoingBandwidth;
  3402. }
  3403. }
  3404. }
  3405. for (peer = host->peers; peer < &host->peers[host->peerCount]; ++peer) {
  3406. if (peer->state != ENET_PEER_STATE_CONNECTED && peer->state != ENET_PEER_STATE_DISCONNECT_LATER)
  3407. continue;
  3408. command.header.command = ENET_PROTOCOL_COMMAND_BANDWIDTH_LIMIT | ENET_PROTOCOL_COMMAND_FLAG_ACKNOWLEDGE;
  3409. command.header.channelID = 0xFF;
  3410. command.bandwidthLimit.outgoingBandwidth = ENET_HOST_TO_NET_32(host->outgoingBandwidth);
  3411. if (peer->incomingBandwidthThrottleEpoch == timeCurrent)
  3412. command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32(peer->outgoingBandwidth);
  3413. else
  3414. command.bandwidthLimit.incomingBandwidth = ENET_HOST_TO_NET_32(bandwidthLimit);
  3415. enet_peer_queue_outgoing_command(peer, &command, NULL, 0, 0);
  3416. }
  3417. }
  3418. }
  3419. /*
  3420. =======================================================================
  3421. Address
  3422. =======================================================================
  3423. */
  3424. int enet_address_set_host_ip(ENetAddress* address, const char* ip) {
  3425. int type = AF_INET6;
  3426. void* destination = &address->ipv6;
  3427. if (strchr(ip, ':') == NULL) {
  3428. type = AF_INET;
  3429. // Cherry pick from nx repo, commit c885a64
  3430. memset(address, 0, sizeof(address->ipv4.zeros));
  3431. address->ipv4.ffff = 0xFFFF;
  3432. destination = &address->ipv4.ip;
  3433. }
  3434. if (!inet_pton(type, ip, destination)) {
  3435. ENET_LOG_ERROR("inet_pton failure");
  3436. return ENET_INET_PTON_FAILURE;
  3437. }
  3438. return 0;
  3439. }
  3440. int enet_address_set_host(ENetAddress* address, const char* name) {
  3441. struct addrinfo hints, * resultList = NULL, * result = NULL;
  3442. memset(&hints, 0, sizeof(hints));
  3443. hints.ai_family = AF_UNSPEC;
  3444. if (getaddrinfo(name, NULL, &hints, &resultList) != 0) {
  3445. ENET_LOG_ERROR("Could not getaddrinfo");
  3446. return ENET_GETADDRINFO_FAILURE;
  3447. }
  3448. for (result = resultList; result != NULL; result = result->ai_next) {
  3449. if (result->ai_addr != NULL && result->ai_addrlen >= sizeof(struct sockaddr_in)) {
  3450. if (result->ai_family == AF_INET) {
  3451. struct sockaddr_in* sin = (struct sockaddr_in*)result->ai_addr;
  3452. memset(address, 0, sizeof(address->ipv4.zeros));
  3453. address->ipv4.ffff = 0xFFFF;
  3454. address->ipv4.ip.s_addr = sin->sin_addr.s_addr;
  3455. freeaddrinfo(resultList);
  3456. return 0;
  3457. }
  3458. else if (result->ai_family == AF_INET6) {
  3459. struct sockaddr_in6* sin = (struct sockaddr_in6*)result->ai_addr;
  3460. address->ipv6 = sin->sin6_addr;
  3461. freeaddrinfo(resultList);
  3462. return 0;
  3463. }
  3464. }
  3465. }
  3466. if (resultList != NULL)
  3467. freeaddrinfo(resultList);
  3468. return enet_address_set_host_ip(address, name);
  3469. }
  3470. int enet_address_get_host_ip(const ENetAddress* address, char* ip, size_t ipLength) {
  3471. if (inet_ntop(AF_INET6, &address->ipv6, ip, ipLength) == NULL) {
  3472. ENET_LOG_ERROR("inet_ntop failure (was NULL)");
  3473. return ENET_INET_PTON_FAILURE;
  3474. }
  3475. if (enet_array_is_zeroed(address->ipv4.zeros, sizeof(address->ipv4.zeros)) == 0 && address->ipv4.ffff == 0xFFFF)
  3476. enet_string_copy(ip, ip + 7, ipLength);
  3477. return 0;
  3478. }
  3479. int enet_address_get_host(const ENetAddress* address, char* name, size_t nameLength) {
  3480. struct sockaddr_in6 sin;
  3481. int err;
  3482. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3483. sin.sin6_family = AF_INET6;
  3484. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3485. sin.sin6_addr = address->ipv6;
  3486. err = getnameinfo((struct sockaddr*) & sin, sizeof(sin), name, nameLength, NULL, 0, NI_NAMEREQD);
  3487. if (!err) {
  3488. if (name != NULL && nameLength > 0 && !memchr(name, '\0', nameLength)) {
  3489. ENET_LOG_ERROR("something funky going on here");
  3490. return ENET_HOST_FUNKYSTUFF;
  3491. }
  3492. return ENET_HOST_RANDOMERROR;
  3493. }
  3494. if (err != EAI_NONAME) {
  3495. ENET_LOG_ERROR("some error occurred: %i", err);
  3496. return -1;
  3497. }
  3498. return enet_address_get_host_ip(address, name, nameLength);
  3499. }
  3500. /*
  3501. =======================================================================
  3502. Platform-specific (Unix)
  3503. =======================================================================
  3504. */
  3505. #ifndef _WIN32
  3506. int enet_initialize(void) {
  3507. return 0;
  3508. }
  3509. void enet_deinitialize(void) { }
  3510. enet_uint64 enet_host_random_seed(void) {
  3511. struct timeval timeVal;
  3512. gettimeofday(&timeVal, NULL);
  3513. return (timeVal.tv_sec * 1000) ^ (timeVal.tv_usec / 1000);
  3514. }
  3515. int enet_socket_bind(ENetSocket socket, const ENetAddress* address) {
  3516. struct sockaddr_in6 sin;
  3517. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3518. sin.sin6_family = AF_INET6;
  3519. if (address != NULL) {
  3520. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3521. sin.sin6_addr = address->ipv6;
  3522. }
  3523. else {
  3524. sin.sin6_port = 0;
  3525. sin.sin6_addr = ENET_HOST_ANY;
  3526. }
  3527. return bind(socket, (struct sockaddr*) & sin, sizeof(struct sockaddr_in6));
  3528. }
  3529. int enet_socket_get_address(ENetSocket socket, ENetAddress* address) {
  3530. struct sockaddr_storage sa;
  3531. socklen_t saLength = sizeof(sa);
  3532. if (getsockname(socket, (struct sockaddr*) & sa, &saLength) == -1) {
  3533. ENET_LOG_ERROR("getsockname failure");
  3534. return ENET_GETSOCKINFO_FAILURE;
  3535. }
  3536. if (sa.ss_family == AF_INET) {
  3537. struct sockaddr_in* sin = (struct sockaddr_in*) & sa;
  3538. memset(address, 0, sizeof(address->ipv4.zeros));
  3539. address->ipv4.ffff = 0xFFFF;
  3540. address->ipv4.ip = sin->sin_addr;
  3541. address->port = ENET_NET_TO_HOST_16(sin->sin_port);
  3542. }
  3543. else if (sa.ss_family == AF_INET6) {
  3544. struct sockaddr_in6* sin = (struct sockaddr_in6*) & sa;
  3545. address->ipv6 = sin->sin6_addr;
  3546. address->port = ENET_NET_TO_HOST_16(sin->sin6_port);
  3547. }
  3548. return 0;
  3549. }
  3550. int enet_socket_listen(ENetSocket socket, int backlog) {
  3551. return listen(socket, backlog < 0 ? SOMAXCONN : backlog);
  3552. }
  3553. ENetSocket enet_socket_create(ENetSocketType type) {
  3554. int socketType = (type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM);
  3555. #ifdef SOCK_CLOEXEC
  3556. socketType |= SOCK_CLOEXEC;
  3557. #endif
  3558. return socket(PF_INET6, socketType, 0);
  3559. }
  3560. int enet_socket_set_option(ENetSocket socket, ENetSocketOption option, int value) {
  3561. int result = -1;
  3562. switch (option) {
  3563. case ENET_SOCKOPT_NONBLOCK:
  3564. result = fcntl(socket, F_SETFL, (value ? O_NONBLOCK : 0) | (fcntl(socket, F_GETFL) & ~O_NONBLOCK));
  3565. break;
  3566. case ENET_SOCKOPT_BROADCAST:
  3567. result = setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char*)&value, sizeof(int));
  3568. break;
  3569. case ENET_SOCKOPT_REUSEADDR:
  3570. result = setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, (char*)&value, sizeof(int));
  3571. break;
  3572. case ENET_SOCKOPT_RCVBUF:
  3573. result = setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char*)&value, sizeof(int));
  3574. break;
  3575. case ENET_SOCKOPT_SNDBUF:
  3576. result = setsockopt(socket, SOL_SOCKET, SO_SNDBUF, (char*)&value, sizeof(int));
  3577. break;
  3578. case ENET_SOCKOPT_RCVTIMEO: {
  3579. struct timeval timeVal;
  3580. timeVal.tv_sec = value / 1000;
  3581. timeVal.tv_usec = (value % 1000) * 1000;
  3582. result = setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (char*)&timeVal, sizeof(struct timeval));
  3583. break;
  3584. }
  3585. case ENET_SOCKOPT_SNDTIMEO: {
  3586. struct timeval timeVal;
  3587. timeVal.tv_sec = value / 1000;
  3588. timeVal.tv_usec = (value % 1000) * 1000;
  3589. result = setsockopt(socket, SOL_SOCKET, SO_SNDTIMEO, (char*)&timeVal, sizeof(struct timeval));
  3590. break;
  3591. }
  3592. case ENET_SOCKOPT_NODELAY:
  3593. result = setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&value, sizeof(int));
  3594. break;
  3595. case ENET_SOCKOPT_IPV6_V6ONLY:
  3596. result = setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&value, sizeof(int));
  3597. break;
  3598. default:
  3599. break;
  3600. }
  3601. return result == -1 ? -1 : 0;
  3602. }
  3603. int enet_socket_get_option(ENetSocket socket, ENetSocketOption option, int* value) {
  3604. int result = -1;
  3605. socklen_t len;
  3606. switch (option) {
  3607. case ENET_SOCKOPT_ERROR:
  3608. len = sizeof(int);
  3609. result = getsockopt(socket, SOL_SOCKET, SO_ERROR, value, &len);
  3610. break;
  3611. default:
  3612. break;
  3613. }
  3614. return result == -1 ? -1 : 0;
  3615. }
  3616. int enet_socket_connect(ENetSocket socket, const ENetAddress* address) {
  3617. int result = -1;
  3618. struct sockaddr_in6 sin;
  3619. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3620. sin.sin6_family = AF_INET6;
  3621. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3622. sin.sin6_addr = address->ipv6;
  3623. result = connect(socket, (struct sockaddr*) & sin, sizeof(struct sockaddr_in6));
  3624. if (result == -1 && errno == EINPROGRESS)
  3625. return 0;
  3626. return result;
  3627. }
  3628. ENetSocket enet_socket_accept(ENetSocket socket, ENetAddress* address) {
  3629. int result = -1;
  3630. struct sockaddr_in6 sin;
  3631. socklen_t sinLength = sizeof(struct sockaddr_in6);
  3632. result = accept(socket, address != NULL ? (struct sockaddr*) & sin : NULL, address != NULL ? &sinLength : NULL);
  3633. if (result == -1)
  3634. return ENET_SOCKET_NULL;
  3635. if (address != NULL) {
  3636. address->ipv6 = sin.sin6_addr;
  3637. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3638. }
  3639. return result;
  3640. }
  3641. int enet_socket_shutdown(ENetSocket socket, ENetSocketShutdown how) {
  3642. return shutdown(socket, (int)how);
  3643. }
  3644. void enet_socket_destroy(ENetSocket socket) {
  3645. if (socket != ENET_SOCKET_NULL)
  3646. close(socket);
  3647. }
  3648. int enet_socket_send(ENetSocket socket, const ENetAddress* address, const ENetBuffer* buffers, size_t bufferCount) {
  3649. struct msghdr msgHdr;
  3650. struct sockaddr_in6 sin;
  3651. int sentLength;
  3652. memset(&msgHdr, 0, sizeof(struct msghdr));
  3653. if (address != NULL) {
  3654. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3655. sin.sin6_family = AF_INET6;
  3656. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3657. sin.sin6_addr = address->ipv6;
  3658. msgHdr.msg_name = &sin;
  3659. msgHdr.msg_namelen = sizeof(struct sockaddr_in6);
  3660. }
  3661. msgHdr.msg_iov = (struct iovec*)buffers;
  3662. msgHdr.msg_iovlen = bufferCount;
  3663. sentLength = sendmsg(socket, &msgHdr, MSG_NOSIGNAL);
  3664. if (sentLength == -1) {
  3665. if (errno == EWOULDBLOCK)
  3666. return 0;
  3667. ENET_LOG_ERROR("sentLength weirdness");
  3668. return ENET_SOCKET_SEND_WEIRDNESS;
  3669. }
  3670. return sentLength;
  3671. }
  3672. int enet_socket_receive(ENetSocket socket, ENetAddress* address, ENetBuffer* buffers, size_t bufferCount) {
  3673. struct msghdr msgHdr;
  3674. struct sockaddr_in6 sin;
  3675. int recvLength;
  3676. memset(&msgHdr, 0, sizeof(struct msghdr));
  3677. if (address != NULL) {
  3678. msgHdr.msg_name = &sin;
  3679. msgHdr.msg_namelen = sizeof(struct sockaddr_in6);
  3680. }
  3681. msgHdr.msg_iov = (struct iovec*)buffers;
  3682. msgHdr.msg_iovlen = bufferCount;
  3683. recvLength = recvmsg(socket, &msgHdr, MSG_NOSIGNAL);
  3684. if (recvLength == -1) {
  3685. if (errno == EWOULDBLOCK)
  3686. return 0;
  3687. ENET_LOG_ERROR("recvLength weirdness");
  3688. return ENET_SOCKET_RECEIVE_WEIRDNESS;
  3689. }
  3690. if (msgHdr.msg_flags & MSG_TRUNC) {
  3691. ENET_LOG_ERROR("message was truncated...");
  3692. return ENET_SOCKET_MSGTRUNCATED;
  3693. }
  3694. if (address != NULL) {
  3695. address->ipv6 = sin.sin6_addr;
  3696. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3697. }
  3698. return recvLength;
  3699. }
  3700. int enet_socket_set_select(ENetSocket maxSocket, ENetSocketSet* readSet, ENetSocketSet* writeSet, enet_uint32 timeout) {
  3701. struct timeval timeVal;
  3702. timeVal.tv_sec = timeout / 1000;
  3703. timeVal.tv_usec = (timeout % 1000) * 1000;
  3704. return select(maxSocket + 1, readSet, writeSet, NULL, &timeVal);
  3705. }
  3706. int enet_socket_wait(ENetSocket socket, enet_uint32* condition, enet_uint64 timeout) {
  3707. struct pollfd pollSocket;
  3708. int pollCount;
  3709. pollSocket.fd = socket;
  3710. pollSocket.events = 0;
  3711. if (*condition & ENET_SOCKET_WAIT_SEND)
  3712. pollSocket.events |= POLLOUT;
  3713. if (*condition & ENET_SOCKET_WAIT_RECEIVE)
  3714. pollSocket.events |= POLLIN;
  3715. pollCount = poll(&pollSocket, 1, timeout);
  3716. if (pollCount < 0) {
  3717. if (errno == EINTR && *condition & ENET_SOCKET_WAIT_INTERRUPT) {
  3718. *condition = ENET_SOCKET_WAIT_INTERRUPT;
  3719. return 0;
  3720. }
  3721. ENET_LOG_ERROR("pollCount < 0: %i", pollCount);
  3722. return ENET_SOCKET_WAITPOLL_NEGATIVE;
  3723. }
  3724. *condition = ENET_SOCKET_WAIT_NONE;
  3725. if (pollCount == 0)
  3726. return 0;
  3727. if (pollSocket.revents & POLLOUT)
  3728. *condition |= ENET_SOCKET_WAIT_SEND;
  3729. if (pollSocket.revents & POLLIN)
  3730. *condition |= ENET_SOCKET_WAIT_RECEIVE;
  3731. return 0;
  3732. }
  3733. #endif
  3734. /*
  3735. =======================================================================
  3736. Platform-specific (Windows)
  3737. =======================================================================
  3738. */
  3739. #ifdef _WIN32
  3740. int enet_initialize(void) {
  3741. WORD versionRequested = MAKEWORD(2, 2);
  3742. WSADATA wsaData;
  3743. if (WSAStartup(versionRequested, &wsaData)) {
  3744. ENET_LOG_ERROR("WSAStartup failure");
  3745. return ENET_SOCKET_WSAFAILED;
  3746. }
  3747. if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
  3748. ENET_LOG_ERROR("Winsock version mismatch");
  3749. WSACleanup();
  3750. return ENET_SOCKET_WINSOCKMISMATCH;
  3751. }
  3752. timeBeginPeriod(1);
  3753. ENET_LOG_TRACE("Initialization");
  3754. return 0;
  3755. }
  3756. void enet_deinitialize(void) {
  3757. timeEndPeriod(1);
  3758. WSACleanup();
  3759. ENET_LOG_TRACE("Deinitialization");
  3760. }
  3761. enet_uint64 enet_host_random_seed(void) {
  3762. return (enet_uint64)timeGetTime();
  3763. }
  3764. int enet_socket_bind(ENetSocket socket, const ENetAddress* address) {
  3765. struct sockaddr_in6 sin;
  3766. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3767. sin.sin6_family = AF_INET6;
  3768. if (address != NULL) {
  3769. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3770. sin.sin6_addr = address->ipv6;
  3771. }
  3772. else {
  3773. sin.sin6_port = 0;
  3774. sin.sin6_addr = in6addr_any;
  3775. }
  3776. return bind(socket, (struct sockaddr*) & sin, sizeof(struct sockaddr_in6)) == SOCKET_ERROR ? -1 : 0;
  3777. }
  3778. int enet_socket_get_address(ENetSocket socket, ENetAddress* address) {
  3779. struct sockaddr_storage sa;
  3780. socklen_t saLength = sizeof(sa);
  3781. if (getsockname(socket, (struct sockaddr*) & sa, &saLength) == -1) {
  3782. ENET_LOG_ERROR("getsockname failure");
  3783. return ENET_GETSOCKINFO_FAILURE;
  3784. }
  3785. if (sa.ss_family == AF_INET) {
  3786. struct sockaddr_in* sin = (struct sockaddr_in*) & sa;
  3787. memset(address, 0, sizeof(address->ipv4.zeros));
  3788. address->ipv4.ffff = 0xFFFF;
  3789. address->ipv4.ip = sin->sin_addr;
  3790. address->port = ENET_NET_TO_HOST_16(sin->sin_port);
  3791. }
  3792. else if (sa.ss_family == AF_INET6) {
  3793. struct sockaddr_in6* sin = (struct sockaddr_in6*) & sa;
  3794. address->ipv6 = sin->sin6_addr;
  3795. address->port = ENET_NET_TO_HOST_16(sin->sin6_port);
  3796. }
  3797. return 0;
  3798. }
  3799. int enet_socket_listen(ENetSocket socket, int backlog) {
  3800. return listen(socket, backlog < 0 ? SOMAXCONN : backlog) == SOCKET_ERROR ? -1 : 0;
  3801. }
  3802. ENetSocket enet_socket_create(ENetSocketType type) {
  3803. return socket(PF_INET6, type == ENET_SOCKET_TYPE_DATAGRAM ? SOCK_DGRAM : SOCK_STREAM, 0);
  3804. }
  3805. int enet_socket_set_option(ENetSocket socket, ENetSocketOption option, int value) {
  3806. int result = SOCKET_ERROR;
  3807. switch (option) {
  3808. case ENET_SOCKOPT_NONBLOCK: {
  3809. u_long nonBlocking = (u_long)value;
  3810. result = ioctlsocket(socket, FIONBIO, &nonBlocking);
  3811. break;
  3812. }
  3813. case ENET_SOCKOPT_BROADCAST:
  3814. result = setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char*)&value, sizeof(int));
  3815. break;
  3816. case ENET_SOCKOPT_REUSEADDR:
  3817. result = setsockopt(socket, SOL_SOCKET, SO_REUSEADDR, (char*)&value, sizeof(int));
  3818. break;
  3819. case ENET_SOCKOPT_RCVBUF:
  3820. result = setsockopt(socket, SOL_SOCKET, SO_RCVBUF, (char*)&value, sizeof(int));
  3821. break;
  3822. case ENET_SOCKOPT_SNDBUF:
  3823. result = setsockopt(socket, SOL_SOCKET, SO_SNDBUF, (char*)&value, sizeof(int));
  3824. break;
  3825. case ENET_SOCKOPT_RCVTIMEO:
  3826. result = setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (char*)&value, sizeof(int));
  3827. break;
  3828. case ENET_SOCKOPT_SNDTIMEO:
  3829. result = setsockopt(socket, SOL_SOCKET, SO_SNDTIMEO, (char*)&value, sizeof(int));
  3830. break;
  3831. case ENET_SOCKOPT_NODELAY:
  3832. result = setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&value, sizeof(int));
  3833. break;
  3834. case ENET_SOCKOPT_IPV6_V6ONLY:
  3835. result = setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&value, sizeof(int));
  3836. break;
  3837. default:
  3838. break;
  3839. }
  3840. return result == SOCKET_ERROR ? -1 : 0;
  3841. }
  3842. int enet_socket_get_option(ENetSocket socket, ENetSocketOption option, int* value) {
  3843. int result = SOCKET_ERROR, len;
  3844. switch (option) {
  3845. case ENET_SOCKOPT_ERROR:
  3846. len = sizeof(int);
  3847. result = getsockopt(socket, SOL_SOCKET, SO_ERROR, (char*)value, &len);
  3848. break;
  3849. default:
  3850. break;
  3851. }
  3852. return result == SOCKET_ERROR ? -1 : 0;
  3853. }
  3854. int enet_socket_connect(ENetSocket socket, const ENetAddress* address) {
  3855. int result = -1;
  3856. struct sockaddr_in6 sin;
  3857. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3858. sin.sin6_family = AF_INET6;
  3859. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3860. sin.sin6_addr = address->ipv6;
  3861. result = connect(socket, (struct sockaddr*) & sin, sizeof(struct sockaddr_in6));
  3862. if (result == SOCKET_ERROR && WSAGetLastError() != WSAEWOULDBLOCK) {
  3863. int winSockWhat = WSAGetLastError();
  3864. ENET_LOG_ERROR("Socket connect failure, return code: %i, WSAGetLastError: %i", result, winSockWhat);
  3865. return ENET_SOCKET_WSAFAILED;
  3866. }
  3867. return 0;
  3868. }
  3869. ENetSocket enet_socket_accept(ENetSocket socket, ENetAddress* address) {
  3870. SOCKET result;
  3871. struct sockaddr_in6 sin;
  3872. int sinLength = sizeof(struct sockaddr_in6);
  3873. result = accept(socket, address != NULL ? (struct sockaddr*) & sin : NULL, address != NULL ? &sinLength : NULL);
  3874. if (result == INVALID_SOCKET) {
  3875. ENET_LOG_ERROR("Tried to accept from an invalid socket");
  3876. return ENET_SOCKET_NULL;
  3877. }
  3878. if (address != NULL) {
  3879. address->ipv6 = sin.sin6_addr;
  3880. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3881. }
  3882. return result;
  3883. }
  3884. int enet_socket_shutdown(ENetSocket socket, ENetSocketShutdown how) {
  3885. return shutdown(socket, (int)how) == SOCKET_ERROR ? -1 : 0;
  3886. }
  3887. void enet_socket_destroy(ENetSocket socket) {
  3888. if (socket != INVALID_SOCKET)
  3889. closesocket(socket);
  3890. }
  3891. int enet_socket_send(ENetSocket socket, const ENetAddress* address, const ENetBuffer* buffers, size_t bufferCount) {
  3892. struct sockaddr_in6 sin;
  3893. DWORD sentLength;
  3894. if (address != NULL) {
  3895. memset(&sin, 0, sizeof(struct sockaddr_in6));
  3896. sin.sin6_family = AF_INET6;
  3897. sin.sin6_port = ENET_HOST_TO_NET_16(address->port);
  3898. sin.sin6_addr = address->ipv6;
  3899. }
  3900. 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)
  3901. return (WSAGetLastError() == WSAEWOULDBLOCK) ? 0 : -1;
  3902. return (int)sentLength;
  3903. }
  3904. int enet_socket_receive(ENetSocket socket, ENetAddress* address, ENetBuffer* buffers, size_t bufferCount) {
  3905. INT sinLength = sizeof(struct sockaddr_in6);
  3906. DWORD flags = 0, recvLength;
  3907. struct sockaddr_in6 sin;
  3908. if (WSARecvFrom(socket, (LPWSABUF)buffers, (DWORD)bufferCount, &recvLength, &flags, address != NULL ? (struct sockaddr*) & sin : NULL, address != NULL ? &sinLength : NULL, NULL, NULL) == SOCKET_ERROR) {
  3909. int retCode = WSAGetLastError();
  3910. switch (retCode) {
  3911. case WSAEWOULDBLOCK:
  3912. case WSAECONNRESET:
  3913. return 0;
  3914. }
  3915. ENET_LOG_ERROR("Socket receive failure, WSA return code %d", retCode);
  3916. return ENET_SOCKET_WSAFAILED;
  3917. }
  3918. if (flags & MSG_PARTIAL) {
  3919. ENET_LOG_ERROR("Socket receive message was partial??");
  3920. return ENET_SOCKET_MSGPARTIAL;
  3921. }
  3922. if (address != NULL) {
  3923. address->ipv6 = sin.sin6_addr;
  3924. address->port = ENET_NET_TO_HOST_16(sin.sin6_port);
  3925. }
  3926. return (int)recvLength;
  3927. }
  3928. int enet_socket_set_select(ENetSocket maxSocket, ENetSocketSet* readSet, ENetSocketSet* writeSet, enet_uint32 timeout) {
  3929. struct timeval timeVal;
  3930. timeVal.tv_sec = timeout / 1000;
  3931. timeVal.tv_usec = (timeout % 1000) * 1000;
  3932. return select(maxSocket + 1, readSet, writeSet, NULL, &timeVal);
  3933. }
  3934. int enet_socket_wait(ENetSocket socket, enet_uint32* condition, enet_uint64 timeout) {
  3935. fd_set readSet, writeSet;
  3936. struct timeval timeVal;
  3937. int selectCount;
  3938. timeVal.tv_sec = timeout / 1000;
  3939. timeVal.tv_usec = (timeout % 1000) * 1000;
  3940. FD_ZERO(&readSet);
  3941. FD_ZERO(&writeSet);
  3942. if (*condition & ENET_SOCKET_WAIT_SEND)
  3943. FD_SET(socket, &writeSet);
  3944. if (*condition & ENET_SOCKET_WAIT_RECEIVE)
  3945. FD_SET(socket, &readSet);
  3946. selectCount = select(socket + 1, &readSet, &writeSet, NULL, &timeVal);
  3947. if (selectCount < 0) {
  3948. ENET_LOG_ERROR("selectCount < 0; was %d", selectCount);
  3949. return ENET_SOCKET_WAITPOLL_NEGATIVE;
  3950. }
  3951. *condition = ENET_SOCKET_WAIT_NONE;
  3952. if (selectCount == 0)
  3953. return 0;
  3954. if (FD_ISSET(socket, &writeSet))
  3955. *condition |= ENET_SOCKET_WAIT_SEND;
  3956. if (FD_ISSET(socket, &readSet))
  3957. *condition |= ENET_SOCKET_WAIT_RECEIVE;
  3958. return 0;
  3959. }
  3960. #endif
  3961. /*
  3962. =======================================================================
  3963. Extended functionality
  3964. =======================================================================
  3965. */
  3966. void* enet_packet_get_data(const ENetPacket* packet) {
  3967. return (void*)packet->data;
  3968. }
  3969. int enet_packet_get_length(const ENetPacket* packet) {
  3970. return packet->dataLength;
  3971. }
  3972. void enet_packet_set_free_callback(ENetPacket* packet, const void* callback) {
  3973. packet->freeCallback = (ENetPacketFreeCallback)callback;
  3974. }
  3975. int enet_packet_check_references(const ENetPacket* packet) {
  3976. return (int)packet->referenceCount;
  3977. }
  3978. void enet_packet_dispose(ENetPacket* packet) {
  3979. if (packet->referenceCount == 0)
  3980. enet_packet_destroy(packet);
  3981. }
  3982. enet_uint32 enet_host_get_peers_count(const ENetHost* host) {
  3983. return host->connectedPeers;
  3984. }
  3985. enet_uint32 enet_host_get_packets_sent(const ENetHost* host) {
  3986. return host->totalSentPackets;
  3987. }
  3988. enet_uint32 enet_host_get_packets_received(const ENetHost* host) {
  3989. return host->totalReceivedPackets;
  3990. }
  3991. enet_uint32 enet_host_get_bytes_sent(const ENetHost* host) {
  3992. return host->totalSentData;
  3993. }
  3994. enet_uint32 enet_host_get_bytes_received(const ENetHost* host) {
  3995. return host->totalReceivedData;
  3996. }
  3997. enet_uint32 enet_peer_get_id(const ENetPeer* peer) {
  3998. return peer->incomingPeerID;
  3999. }
  4000. int enet_peer_get_ip(const ENetPeer* peer, char* ip, size_t ipLength) {
  4001. return enet_address_get_host_ip(&peer->address, ip, ipLength);
  4002. }
  4003. enet_uint16 enet_peer_get_port(const ENetPeer* peer) {
  4004. return peer->address.port;
  4005. }
  4006. enet_uint32 enet_peer_get_mtu(const ENetPeer* peer) {
  4007. return peer->mtu;
  4008. }
  4009. ENetPeerState enet_peer_get_state(const ENetPeer* peer) {
  4010. return peer->state;
  4011. }
  4012. enet_uint32 enet_peer_get_rtt(const ENetPeer* peer) {
  4013. return peer->smoothedRoundTripTime;
  4014. }
  4015. enet_uint32 enet_peer_get_lastsendtime(const ENetPeer* peer) {
  4016. return peer->lastSendTime;
  4017. }
  4018. enet_uint32 enet_peer_get_lastreceivetime(const ENetPeer* peer) {
  4019. return peer->lastReceiveTime;
  4020. }
  4021. enet_uint64 enet_peer_get_packets_sent(const ENetPeer* peer) {
  4022. return peer->totalPacketsSent;
  4023. }
  4024. enet_uint64 enet_peer_get_packets_lost(const ENetPeer* peer) {
  4025. return peer->totalPacketsLost;
  4026. }
  4027. enet_uint64 enet_peer_get_bytes_sent(const ENetPeer* peer) {
  4028. return peer->totalDataSent;
  4029. }
  4030. enet_uint64 enet_peer_get_bytes_received(const ENetPeer* peer) {
  4031. return peer->totalDataReceived;
  4032. }
  4033. void* enet_peer_get_data(const ENetPeer* peer) {
  4034. return (void*)peer->data;
  4035. }
  4036. void enet_peer_set_data(ENetPeer* peer, const void* data) {
  4037. peer->data = (enet_uint32*)data;
  4038. }
  4039. #ifdef __cplusplus
  4040. }
  4041. #endif
  4042. #endif
  4043. #endif