int server_receive_packets() {
static size_t num_packets_received = 0;
static size_t num_bytes_received = 0;
static _timer timer2;
time_t t = timer2.get_ns();
if (t > 1000000000) {
std::cerr << "packets received per second: " << num_packets_received << " (" << num_bytes_received << " B/s).\n";
timer2.begin();
num_packets_received = 0;
num_bytes_received = 0;
}
struct sockaddr_in from;
socklen_t from_length = sizeof(from);
// the UDP socket is now int non-blocking mode, i.e. recvfrom returns 0 if no packets are to be read
// memset(packet_data, 0, maximum_packet_size); ***
memset(&from, 0, from_length);
int received_bytes = recvfrom(sockfd, (char*)packet_data,
maximum_packet_size, 0, (struct sockaddr*)&from, &from_length);
packet_data[received_bytes] = '\0';
num_bytes_received += received_bytes < 0 ? 0 : received_bytes;
size_t num_packets = 0;
if (received_bytes <= 0) { return 1; }
// else:
num_packets_received++;
do {
++num_packets;
num_bytes_received += received_bytes < 0 ? 0 : received_bytes;
;
server_process_packet(&from);
memset(&from, 0, from_length);
received_bytes = recvfrom(sockfd, (char*)packet_data,
maximum_packet_size, 0, (struct sockaddr*)&from, &from_length);
packet_data[received_bytes] = '\0';
} while (received_bytes > 0);
return 0;
}
int main (int argc, char ** argv) {
prev = getthetime();
(void) signal(SIGINT,leave);
if (enet_initialize () != 0) {
fprintf (stderr, "An error occurred while initializing ENet.\n");
return EXIT_FAILURE;
}
atexit (enet_deinitialize);
address.host = ENET_HOST_ANY;
address.port = 5001;
enetserver = enet_host_create (& address /* the address to bind the server host to */,
32 /* allow up to 32 clients and/or outgoing connections */,
0 /* allow up to 2 channels to be used, 0 and 1 */,
0 /* assume any amount of incoming bandwidth */,
0 /* assume any amount of outgoing bandwidth */);
if (enetserver== NULL) {
fprintf (stderr,
"An error occurred while trying to create an ENet server host.\n");
exit (EXIT_FAILURE);
}
tronserver = server_init(enetserver);
atexit(clean_up);
printf("This is the TronClone Server.\nPush ^c to kill the server.\n");
/* Main game loop */
while(1) {
int i, index, temp;
char buf[80];
if (enet_host_service (enetserver, & event, 10) > 0) {
switch (event.type) {
case ENET_EVENT_TYPE_CONNECT:
enet_address_get_host_ip(&event.peer->address, buf, sizeof buf);
printf ("A new client connected from %s\n",
buf);
server_add_user(tronserver, event.peer);
break;
case ENET_EVENT_TYPE_RECEIVE:
server_process_packet(tronserver, event);
enet_packet_destroy (event.packet);
break;
case ENET_EVENT_TYPE_DISCONNECT:
enet_address_get_host_ip(&event.peer->address, buf, sizeof buf);
printf ("A client disconnected from %s: %u.\n",
buf,
event.peer -> address.port);
server_remove_user(tronserver, event.peer);
event.peer -> data = NULL;
break;
}
}
now = getthetime();
double h = (now-prev)/1000000.0f;
server_update(tronserver, h);
prev = now;
}
clean_up();
}
