Implement UDP listen bind address

core/io/packet_peer_udp.cpp

@@ -59,7 +59,7 @@ void PacketPeerUDP::set_ip_type(IP::Type p_type) {
 void PacketPeerUDP::_bind_methods() {
 
 	ClassDB::bind_method(_MD("set_ip_type","ip_type"),&PacketPeerUDP::set_ip_type);
-	ClassDB::bind_method(_MD("listen:Error","port", "recv_buf_size"),&PacketPeerUDP::listen,DEFVAL(65536));
+	ClassDB::bind_method(_MD("listen:Error","port", "bind_address", "recv_buf_size"),&PacketPeerUDP::listen,DEFVAL("*"),DEFVAL(65536));
 	ClassDB::bind_method(_MD("close"),&PacketPeerUDP::close);
 	ClassDB::bind_method(_MD("wait:Error"),&PacketPeerUDP::wait);
 	ClassDB::bind_method(_MD("is_listening"),&PacketPeerUDP::is_listening);

core/io/packet_peer_udp.h

@@ -45,12 +45,12 @@ protected:
 
 	String _get_packet_ip() const;
 
-	virtual Error _set_dest_address(const String& p_address,int p_port);
+	Error _set_dest_address(const String& p_address,int p_port);
 
 public:
 
 	virtual void set_ip_type(IP::Type p_type);
-	virtual Error listen(int p_port, int p_recv_buffer_size=65536)=0;
+	virtual Error listen(int p_port, IP_Address p_bind_address=IP_Address("*"), int p_recv_buffer_size=65536)=0;
 	virtual void close()=0;
 	virtual Error wait()=0;
 	virtual bool is_listening() const=0;

drivers/unix/packet_peer_udp_posix.cpp

@@ -98,10 +98,13 @@ Error PacketPeerUDPPosix::put_packet(const uint8_t *p_buffer,int p_buffer_size){
 
 	ERR_FAIL_COND_V(!peer_addr.is_valid(), ERR_UNCONFIGURED);
 
+	if (sock_type==IP::TYPE_NONE)
+		sock_type = peer_addr.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
+
 	int sock = _get_socket();
 	ERR_FAIL_COND_V( sock == -1, FAILED );
 	struct sockaddr_storage addr;
-	size_t addr_size = _set_sockaddr(&addr, peer_addr, peer_port, ip_type);
+	size_t addr_size = _set_sockaddr(&addr, peer_addr, peer_port, sock_type);
 
 	errno = 0;
 	int err;
@@ -121,16 +124,23 @@ int PacketPeerUDPPosix::get_max_packet_size() const{
 	return 512; // uhm maybe not
 }
 
-Error PacketPeerUDPPosix::listen(int p_port, int p_recv_buffer_size) {
+Error PacketPeerUDPPosix::listen(int p_port, IP_Address p_bind_address, int p_recv_buffer_size) {
+
+	ERR_FAIL_COND_V(sockfd!=-1,ERR_ALREADY_IN_USE);
+	ERR_FAIL_COND_V(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(),ERR_INVALID_PARAMETER);
+
+	sock_type = ip_type;
+
+	if(p_bind_address.is_valid())
+		sock_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
 
-	close();
 	int sock = _get_socket();
 
 	if (sock == -1 )
 		return ERR_CANT_CREATE;
 
 	sockaddr_storage addr = {0};
-	size_t addr_size = _set_listen_sockaddr(&addr, p_port, ip_type, IP_Address());
+	size_t addr_size = _set_listen_sockaddr(&addr, p_port, sock_type, IP_Address());
 
 	if (bind(sock, (struct sockaddr*)&addr, addr_size) == -1 ) {
 		close();
@@ -145,6 +155,7 @@ void PacketPeerUDPPosix::close(){
 	if (sockfd != -1)
 		::close(sockfd);
 	sockfd=-1;
+	sock_type = IP::TYPE_NONE;
 	rb.resize(8);
 	queue_count=0;
 }
@@ -225,10 +236,12 @@ int PacketPeerUDPPosix::get_packet_port() const{
 
 int PacketPeerUDPPosix::_get_socket() {
 
+	ERR_FAIL_COND_V(sock_type==IP::TYPE_NONE, -1);
+
 	if (sockfd != -1)
 		return sockfd;
 
-	sockfd = _socket_create(ip_type, SOCK_DGRAM, IPPROTO_UDP);
+	sockfd = _socket_create(sock_type, SOCK_DGRAM, IPPROTO_UDP);
 
 	return sockfd;
 }
@@ -257,6 +270,7 @@ PacketPeerUDPPosix::PacketPeerUDPPosix() {
 	packet_port=0;
 	queue_count=0;
 	peer_port=0;
+	sock_type = IP::TYPE_NONE;
 	ip_type = IP::TYPE_ANY;
 }
 

drivers/unix/packet_peer_udp_posix.h

@@ -48,6 +48,7 @@ class PacketPeerUDPPosix : public PacketPeerUDP {
 	mutable int packet_port;
 	mutable int queue_count;
 	int sockfd;
+	IP::Type sock_type;
 
 	IP_Address peer_addr;
 	int peer_port;
@@ -65,7 +66,7 @@ public:
 
 	virtual int get_max_packet_size() const;
 
-	virtual Error listen(int p_port, int p_recv_buffer_size=65536);
+	virtual Error listen(int p_port, IP_Address p_bind_address=IP_Address("*"), int p_recv_buffer_size=65536);
 	virtual void close();
 	virtual Error wait();
 	virtual bool is_listening() const;

platform/windows/packet_peer_udp_winsock.cpp

@@ -73,10 +73,15 @@ Error PacketPeerUDPWinsock::get_packet(const uint8_t **r_buffer,int &r_buffer_si
 }
 Error PacketPeerUDPWinsock::put_packet(const uint8_t *p_buffer,int p_buffer_size){
 
+	ERR_FAIL_COND_V(!peer_addr.is_valid(), ERR_UNCONFIGURED);
+
+	if(sock_type==IP::TYPE_NONE)
+		sock_type = peer_addr.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
+
 	int sock = _get_socket();
 	ERR_FAIL_COND_V( sock == -1, FAILED );
 	struct sockaddr_storage addr;
-	size_t addr_size = _set_sockaddr(&addr, peer_addr, peer_port, ip_type);
+	size_t addr_size = _set_sockaddr(&addr, peer_addr, peer_port, sock_type);
 
 	_set_blocking(true);
 
@@ -114,15 +119,22 @@ void PacketPeerUDPWinsock::_set_blocking(bool p_blocking) {
 	};
 }
 
-Error PacketPeerUDPWinsock::listen(int p_port, int p_recv_buffer_size) {
+Error PacketPeerUDPWinsock::listen(int p_port, IP_Address p_bind_address, int p_recv_buffer_size) {
+
+	ERR_FAIL_COND_V(sockfd!=-1,ERR_ALREADY_IN_USE);
+	ERR_FAIL_COND_V(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(),ERR_INVALID_PARAMETER);
+
+	sock_type = ip_type;
+
+	if(p_bind_address.is_valid())
+		sock_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
 
-	close();
 	int sock = _get_socket();
 	if (sock == -1 )
 		return ERR_CANT_CREATE;
 
 	struct sockaddr_storage addr = {0};
-	size_t addr_size = _set_listen_sockaddr(&addr, p_port, ip_type, IP_Address());
+	size_t addr_size = _set_listen_sockaddr(&addr, p_port, sock_type, IP_Address());
 
 	if (bind(sock, (struct sockaddr*)&addr, addr_size) == -1 ) {
 		close();
@@ -141,6 +153,7 @@ void PacketPeerUDPWinsock::close(){
 	if (sockfd != -1)
 		::closesocket(sockfd);
 	sockfd=-1;
+	sock_type = IP::TYPE_NONE;
 	rb.resize(8);
 	queue_count=0;
 }
@@ -241,10 +254,12 @@ int PacketPeerUDPWinsock::get_packet_port() const{
 
 int PacketPeerUDPWinsock::_get_socket() {
 
+	ERR_FAIL_COND_V(sock_type==IP::TYPE_NONE,-1);
+
 	if (sockfd != -1)
 		return sockfd;
 
-	sockfd = _socket_create(ip_type, SOCK_DGRAM, IPPROTO_UDP);
+	sockfd = _socket_create(sock_type, SOCK_DGRAM, IPPROTO_UDP);
 
 	return sockfd;
 }
@@ -275,6 +290,7 @@ PacketPeerUDPWinsock::PacketPeerUDPWinsock() {
 	queue_count=0;
 	peer_port=0;
 	ip_type = IP::TYPE_ANY;
+	sock_type = IP::TYPE_NONE;
 }
 
 PacketPeerUDPWinsock::~PacketPeerUDPWinsock() {

platform/windows/packet_peer_udp_winsock.h

@@ -46,6 +46,7 @@ class PacketPeerUDPWinsock : public PacketPeerUDP {
 	mutable int packet_port;
 	mutable int queue_count;
 	int sockfd;
+	IP::Type sock_type;
 
 	IP_Address peer_addr;
 	int peer_port;
@@ -67,7 +68,7 @@ public:
 
 	virtual int get_max_packet_size() const;
 
-	virtual Error listen(int p_port, int p_recv_buffer_size=65536);
+	virtual Error listen(int p_port, IP_Address p_bind_address=IP_Address("*"), int p_recv_buffer_size=65536);
 	virtual void close();
 	virtual Error wait();
 	virtual bool is_listening() const;