1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/unix/packet_peer_udp_posix.cpp b/drivers/unix/packet_peer_udp_posix.cpp
new file mode 100644
index 0000000000..d951524d3a
--- /dev/null
+++ b/drivers/unix/packet_peer_udp_posix.cpp
@@ -0,0 +1,188 @@
+#include "packet_peer_udp_posix.h"
+
+#ifdef UNIX_ENABLED
+
+
+#include <errno.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <stdio.h>
+
+#ifndef NO_FCNTL
+#include <sys/fcntl.h>
+#else
+#include <sys/ioctl.h>
+#endif
+
+#ifdef JAVASCRIPT_ENABLED
+#include <arpa/inet.h>
+#endif
+
+
+int PacketPeerUDPPosix::get_available_packet_count() const {
+
+	Error err = const_cast<PacketPeerUDPPosix*>(this)->poll();
+	if (err!=OK)
+		return 0;
+
+	return queue_count;
+}
+
+Error PacketPeerUDPPosix::get_packet(const uint8_t **r_buffer,int &r_buffer_size) const{
+
+	Error err = const_cast<PacketPeerUDPPosix*>(this)->poll();
+	if (err!=OK)
+		return err;
+	if (queue_count==0)
+		return ERR_UNAVAILABLE;
+
+	uint32_t size;
+	rb.read((uint8_t*)&size,4,true);
+	rb.read((uint8_t*)&packet_ip.host,4,true);
+	rb.read((uint8_t*)&packet_port,4,true);
+	rb.read(packet_buffer,size,true);
+	--queue_count;
+	*r_buffer=packet_buffer;
+	r_buffer_size=size;
+	return OK;
+
+}
+Error PacketPeerUDPPosix::put_packet(const uint8_t *p_buffer,int p_buffer_size){
+
+	int sock = _get_socket();
+	ERR_FAIL_COND_V( sock == -1, FAILED );
+	struct sockaddr_in addr;
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(peer_port);
+	addr.sin_addr = *((struct in_addr*)&peer_addr.host);
+
+	errno = 0;
+	int err;
+	while ( (err = sendto(sock, p_buffer, p_buffer_size, 0, (struct sockaddr*)&addr, sizeof(addr))) != p_buffer_size) {
+
+		if (errno != EAGAIN) {
+			return FAILED;
+		}
+	}
+
+	return OK;
+}
+
+int PacketPeerUDPPosix::get_max_packet_size() const{
+
+	return 512; // uhm maybe not
+}
+
+Error PacketPeerUDPPosix::listen(int p_port, int p_recv_buffer_size){
+
+	close();
+	int sock = _get_socket();
+	if (sock == -1 )
+		return ERR_CANT_CREATE;
+	sockaddr_in addr = {0};
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(p_port);
+	addr.sin_addr.s_addr = INADDR_ANY;
+	if (bind(sock, (struct sockaddr*)&addr, sizeof(sockaddr_in)) == -1 ) {
+		close();
+		return ERR_UNAVAILABLE;
+	}
+	printf("UDP Connection listening on port %i\n", p_port);
+	rb.resize(nearest_power_of_2(p_recv_buffer_size));
+	return OK;
+}
+
+void PacketPeerUDPPosix::close(){
+
+	if (sockfd != -1)
+		::close(sockfd);
+	sockfd=-1;
+	rb.resize(8);
+	queue_count=0;
+}
+
+Error PacketPeerUDPPosix::poll() {
+
+	struct sockaddr_in from = {0};
+	socklen_t len = sizeof(struct sockaddr_in);
+	int ret;
+	while ( (ret = recvfrom(sockfd, recv_buffer, MIN(sizeof(recv_buffer),rb.data_left()-12), MSG_DONTWAIT, (struct sockaddr*)&from, &len)) > 0) {
+		rb.write((uint8_t*)&from.sin_addr, 4);
+		uint32_t port = ntohs(from.sin_port);
+		rb.write((uint8_t*)&port, 4);
+		rb.write((uint8_t*)&ret, 4);
+		rb.write(recv_buffer, ret);
+
+		len = sizeof(struct sockaddr_in);
+		++queue_count;
+	};
+
+	if (ret == 0 || (ret == -1 && errno != EAGAIN) ) {
+		close();
+		return FAILED;
+	};
+
+	return OK;
+}
+bool PacketPeerUDPPosix::is_listening() const{
+
+	return sockfd!=-1;
+}
+
+IP_Address PacketPeerUDPPosix::get_packet_address() const {
+
+	return packet_ip;
+}
+
+int PacketPeerUDPPosix::get_packet_port() const{
+
+	return packet_port;
+}
+
+int PacketPeerUDPPosix::_get_socket() {
+
+	if (sockfd != -1)
+		return sockfd;
+
+	sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	ERR_FAIL_COND_V( sockfd == -1, -1 );
+	//fcntl(sockfd, F_SETFL, O_NONBLOCK);
+
+	return sockfd;
+}
+
+
+void PacketPeerUDPPosix::set_send_address(const IP_Address& p_address,int p_port) {
+
+	peer_addr=p_address;
+	peer_port=p_port;
+}
+
+PacketPeerUDP* PacketPeerUDPPosix::_create() {
+
+	return memnew(PacketPeerUDPPosix);
+};
+
+void PacketPeerUDPPosix::make_default() {
+
+	PacketPeerUDP::_create = PacketPeerUDPPosix::_create;
+};
+
+
+PacketPeerUDPPosix::PacketPeerUDPPosix() {
+
+	sockfd=-1;
+	packet_port=0;
+	queue_count=0;
+	peer_port=0;
+}
+
+PacketPeerUDPPosix::~PacketPeerUDPPosix() {
+
+	close();
+}
+#endif