/**
* @brief Send data to the specified TCP stream.
*/
_Bool Net_SendStream(int32_t sock, const void *data, size_t len) {
mem_buf_t buf;
byte buffer[MAX_MSG_SIZE];
Mem_InitBuffer(&buf, buffer, sizeof(buffer));
// write the packet length
Net_WriteLong(&buf, (int32_t) len);
// and copy the payload
Net_WriteData(&buf, data, len);
ssize_t sent = 0;
while ((size_t) sent < buf.size) {
const ssize_t s = send(sock, (void *)(buf.data + sent), buf.size - sent, 0);
if (s == -1) {
if (Net_GetError() != EWOULDBLOCK) {
Com_Warn("%s\n", Net_GetErrorString());
return false;
}
}
sent += s;
}
return sent == (ssize_t) buf.size;
}
/**
* @brief
*/
void Sv_WriteClientFrame(sv_client_t *client, mem_buf_t *msg) {
sv_frame_t *frame, *delta_frame;
int32_t delta_frame_num;
// this is the frame we are creating
frame = &client->frames[sv.frame_num & PACKET_MASK];
if (client->last_frame < 0) {
// client is asking for a retransmit
delta_frame = NULL;
delta_frame_num = -1;
} else if (sv.frame_num - client->last_frame >= (PACKET_BACKUP - 3)) {
// client hasn't gotten a good message through in a long time
delta_frame = NULL;
delta_frame_num = -1;
} else {
// we have a valid message to delta from
delta_frame = &client->frames[client->last_frame & PACKET_MASK];
delta_frame_num = client->last_frame;
}
Net_WriteByte(msg, SV_CMD_FRAME);
Net_WriteLong(msg, sv.frame_num);
Net_WriteLong(msg, delta_frame_num); // what we are delta'ing from
Net_WriteByte(msg, client->suppress_count); // rate dropped packets
client->suppress_count = 0;
// send over the area bits
Net_WriteByte(msg, frame->area_bytes);
Net_WriteData(msg, frame->area_bits, frame->area_bytes);
// delta encode the player state
Sv_WritePlayerState(delta_frame, frame, msg);
// delta encode the entities
Sv_WriteEntities(delta_frame, frame, msg);
}