size_t I_GetPacket(packet_header_t* buffer, size_t buflen)
{
int checksum;
size_t len;
int status;
status = SDLNet_UDP_Recv(udp_socket, udp_packet);
len = udp_packet->len;
if (buflen<len)
len=buflen;
if ( (status!=0) && (len>0) )
memcpy(buffer, udp_packet->data, len);
sentfrom=udp_packet->channel;
#ifndef SDL_NET_UDP_PACKET_SRC
sentfrom_addr=udp_packet->address;
#else
sentfrom_addr=udp_packet->src; /* cph - allow for old SDL_net library */
#endif
checksum=buffer->checksum;
buffer->checksum=0;
if ( (status!=0) && (len>0)) {
byte psum = ChecksumPacket(buffer, udp_packet->len);
/* fprintf(stderr, "recvlen = %u, stolen = %u, csum = %u, psum = %u\n",
udp_packet->len, len, checksum, psum); */
if (psum == checksum) return len;
}
return 0;
}
void I_SendPacketTo(packet_header_t* packet, size_t len, UDP_CHANNEL *to)
{
printf("I_SendPacketTo Packet=%p, len=%d, Dest=%p\n", packet, len, to);
packet->checksum = ChecksumPacket(packet, len);
memcpy(udp_packet->data, packet, udp_packet->len = len);
SDLNet_UDP_Send(udp_socket, *to, udp_packet);
}
void send_udp_packet(enum packet_type_e type, unsigned tic, void* data, size_t len) {
packet_header_t* p = calloc(sizeof(packet_header_t)+len+1,1);
p->tic = doom_htonl(basetic = tic); p->type = type;
if (!data) {
data = (void*)&consoleplayer; len = 1;
}
memcpy(((char*)p)+sizeof(*p),data,len);
p->checksum = ChecksumPacket(p,sizeof(packet_header_t)+len);
write(udps,p,sizeof(packet_header_t)+len+1);
}
void I_SendPacket(packet_header_t* packet, size_t len)
{
printf("I_SendPacket Packet=%p, len=%d\n", packet, len);
packet->checksum = ChecksumPacket(packet, len);
DumpPacketHeader (packet);
memcpy(udp_packet->data, packet, udp_packet->len = len);
SDLNet_UDP_Send(udp_socket, 0, udp_packet);
}
void I_SendPacketTo(packet_header_t* packet, size_t len, UDP_CHANNEL *to)
{
packet->checksum = ChecksumPacket(packet, len);
memcpy(udp_packet->data, packet, udp_packet->len = len);
SDLNet_UDP_Send(udp_socket, *to, udp_packet);
}
