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server_functions.c
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server_functions.c
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#include "functions.h"
long runTime( void )
{
clock_t t = clock();
return t;
}
void Z_SendPacket( visionpacket_t *packet, int client ) {
if ( client == CLIENT_ALL )
{
for ( int i = 0; i < CLIENTS && visionNetwork.clients[i].state > S_NONE; j++ )
{
UDP_send( &visionNetwork.socket, packet->data, packet->currsize, inet_ntoa( visionNetwork.clients[i].con_info.sin_addr ), htons( visionNetwork.clients[i].con_info.sin_port ) );
}
}
else
{
UDP_send( &visionNetwork.socket, packet->data, packet->currsize, inet_ntoa( visionNetwork.clients[client].con_info.sin_addr ), htons( visionNetwork.clients[client].con_info.sin_port ) );
}
}
void Z_SendRaw( char *msg, int client ) {
if ( client == CLIENT_ALL )
{
for ( int i = 0; i < CLIENTS && visionNetwork.clients[i].state > S_NONE; i++ )
{
UDP_send( &visionNetwork.socket, msg, strlen( msg ) + 1, inet_ntoa( visionNetwork.clients[i].con_info.sin_addr ), htons( visionNetwork.clients[i].con_info.sin_port ) );
}
}
else
{
UDP_send( &visionNetwork.socket, msg, strlen( msg ) + 1, inet_ntoa( visionNetwork.clients[client].con_info.sin_addr ), htons( visionNetwork.clients[client].con_info.sin_port ) );
}
}
int SV_SenderRegistered( void ) {
for ( int i = 0; i < CLIENTS; i++ )
{
if ( !memcmp( &visionNetwork.remote, &visionNetwork.clients[i].con_info, sizeof( struct sockaddr_in ) ) )
{
//printf( "Already registered\n" );
visionNetwork.remote_id = i;
return S_CONNECT;
}
}
//printf( "Not registered\n" );
return S_NONE;
}
int SV_AcceptConnection( visionpacket_t *packet ) {
byte readcmd[] = "connection";
for ( int i = 0; i < strlen( readcmd ); i++ )
{
if ( readcmd[i] != H_Read_Packet( packet, V_CHAR ) )
return C_REFUSED;
}
//read whitespace
if ( H_Read_Packet( packet, V_CHAR ) != WS )
return C_REFUSED;
//check password
byte c = 0;
byte authPass[] = ACCESS_KEY;
int i = 0;
while ( c = H_Read_Packet( packet, V_CHAR ) )
{
if ( authPass[i] != c )
return C_REFUSED;
i++;
}
return C_ACCEPTED;
}
int SV_AssignSlot( visionpacket_t *packet ) {
for ( int i = 0; i < CLIENTS; i++ )
{
if ( visionNetwork.clients[i].state < S_CONNECT )
{
memcpy( &visionNetwork.clients[i].con_info, &visionNetwork.remote, sizeof( struct sockaddr_in ) );
visionNetwork.clients[i].state = S_CONNECT;
visionNetwork.remote_id = i;
visionpacket_t packet;
char buf[16] = { 0 };
H_Init_Packet( &packet, buf, NULL );
H_Write_Packet( &packet, 'a', V_CHAR );
H_Write_Packet( &packet, 'c', V_CHAR );
H_Write_Packet( &packet, 'c', V_CHAR );
H_Write_Packet( &packet, ' ', V_CHAR );
H_Write_Packet( &packet, visionNetwork.remote_id, V_SHORT );
Z_SendPacket( &packet, visionNetwork.remote_id);
//printf( "Assigning\n" );
return C_ACCEPTED;
}
}
//printf( "Can't assign\n" );
return C_REFUSED;
}
int SV_ReturnID() {
return visionNetwork.remote_id;
}
int SV_ParsePacket( void ) {
visionpacket_t *packet = &visionNetwork.msg_packet;
visionNetwork_t *net = &visionNetwork;
if ( SV_SenderRegistered() == S_NONE )
{
//Connection code
if ( SV_AcceptConnection( packet ) == C_REFUSED )
{
//printf( "Refused\n" );
return C_REFUSED;
}
else
return SV_AssignSlot( packet );
}
else
{
int id = SV_ReturnID();
old_clients[id] = net->clients[id];
int seq = H_Read_Packet( packet, V_INTEGER64 );
net->clients[id].uinfo.player.health = H_Read_Packet( packet, V_INTEGER32 );
net->clients[id].uinfo.player.armor = H_Read_Packet( packet, V_INTEGER32 );
net->clients[id].uinfo.player.hat = H_Read_Packet( packet, V_SHORT );
//printf( "Parsing Gamestate\n" );
return C_ACCEPTED;
}
}
static long long staticinteger;
byte delta_states( client_t client[], client_t old_client[] ) {
byte state = 0;
for ( int i = 0; i < CLIENTS; i++ )
{
if ( (client[i].uinfo.player.health - old_client[i].uinfo.player.health ||
client[i].uinfo.player.armor - old_client[i].uinfo.player.armor ||
client[i].uinfo.player.hat - old_client[i].uinfo.player.hat) != 0 )
{
if ( !state )
state = 1 << i;
else
state |= 1 << i;
}
}
return (byte)state;
}
boolean check_state( byte state, int offset ) {
if ( (state >> offset) & 1 )
return 1;
return 0;
}
void Z_SendStates( void ) {
visionpacket_t *packet = &visionNetwork.msg_packet;
visionNetwork_t *net = &visionNetwork;
char buffer[BUF] = { 0 };
H_Init_Packet( packet, buffer, NULL );
H_Write_Packet( packet, staticinteger++, V_INTEGER64 ); // Sequence
byte delta = delta_states( &net->clients, &old_clients );
//H_Write_Packet( packet, delta, V_CHAR );
for ( int i = 0; i < CLIENTS; i++ )
{
if ( check_state( delta, i ) )
{
H_Write_Packet( packet, net->clients[i].uinfo.player.health, V_INTEGER32 );
H_Write_Packet( packet, net->clients[i].uinfo.player.armor, V_INTEGER32 );
H_Write_Packet( packet, net->clients[i].uinfo.player.hat, V_SHORT );
}
}
Z_SendPacket( packet, CLIENT_ALL );
}
void Z_ServerLoop( void ) {
char buffer[BUF];
fd_set fdset;
fd_set fdwrite;
FD_ZERO( &fdset );
FD_ZERO( &fdwrite );
FD_SET( visionNetwork.socket, &fdset );
FD_SET( visionNetwork.socket, &fdwrite );
struct timeval tv_timeout = { 0, (1000 * 1000) / 60 };
int select_retval = select( visionNetwork.socket + 1, &fdset, NULL, NULL, &tv_timeout );
if ( select_retval == -1 )
{
return;
}
if ( FD_ISSET( visionNetwork.socket, &fdset ) )
{
memset( buffer, 0, BUF );
UDP_recv( visionNetwork.socket, &buffer, BUF );
/* erhaltene Nachricht ausgeben */
//printf( "%s:%d: %s\n", inet_ntoa( visionNetwork.remote.sin_addr ), ntohs( visionNetwork.remote.sin_port ), buffer );
//UDP_send( &visionNetwork.socket, "Empfangen", 10, inet_ntoa( visionNetwork.remote.sin_addr ), ntohs( visionNetwork.remote.sin_port ) );
printf( "%s", buffer );
visionNetwork.remote_id = -1,
H_Init_Packet( &visionNetwork.msg_packet, &buffer, NULL );
SV_ParsePacket();
//PF_RunPacketCmd( &buffer, &visionNetwork.remote );
}
if ( FD_ISSET( visionNetwork.socket, &fdwrite ) && Sys_Clock() - l_clock > MSEC_FRAMERATE )
{
Z_SendStates();
l_clock = clock();
}
}
void Z_StartServer_f( void ) {
#ifdef _WIN32
/* Initialisiere TCP für Windows ("winsock"). */
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD( 1, 1 );
if ( WSAStartup( wVersionRequested, &wsaData ) != 0 )
exit( EXIT_FAILURE );
else
printf( "Winsock initialisiert\n" );
#endif
visionNetwork.socket == SOCKET_ERROR;
memset( &old_clients, 0, sizeof( old_clients ) );
memset( visionNetwork.clients, 0, sizeof(visionNetwork.clients) );
for ( int i = 0; i < CLIENTS; i++ )
visionNetwork.clients[i].l_heartbeat = -1;
/* Socket erzeugen */
visionNetwork.socket = create_socket( AF_INET, SOCK_DGRAM, 0 );
bind_socket( &visionNetwork.socket, INADDR_ANY, PORT );
printf( "Warte auf Daten am Port (UDP) %u\n", PORT );
}
void Z_UserInfos( void )
{
visionpacket_t packet;
byte buf[BUF] = { 0 };
H_Init_Packet( &packet, buf, NULL );
H_Write_Packet( &packet, 'n', V_CHAR );
H_Write_Packet( &packet, 'i', V_CHAR );
H_Write_Packet( &packet, ' ', V_CHAR );
for ( int i = 0; i < CLIENTS; i++ )
{
H_Write_Packet( &packet, i, V_SHORT );
H_Write_Packet( &packet, visionNetwork.clients[i].state, V_SHORT );
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.player.playerID, V_SHORT );
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.player.hat, V_SHORT );
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.player.health, V_INTEGER32 );
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.player.armor, V_INTEGER32 );
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.serverip.sin_addr.s_addr, V_INTEGER32 );
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.serverip.sin_port, V_SHORT );
for ( int j = 0; j < 64; j++ )
{
if ( visionNetwork.clients[i].uinfo.servername[j] == NULL )
break;
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.servername[j], V_CHAR );
}
H_Write_Packet( &packet, '\0', V_CHAR );
for ( int j = 0; j < 36; j++ )
{
if ( visionNetwork.clients[i].uinfo.name[j] == NULL )
break;
H_Write_Packet( &packet, visionNetwork.clients[i].uinfo.name[j], V_CHAR );
}
H_Write_Packet( &packet, '\0', V_CHAR );
}
for ( int i = 0; i < CLIENTS; i++ )
{
if ( visionNetwork.clients[i].state < S_AUTH )
continue;
UDP_send( &visionNetwork.socket, packet.data, packet.currsize, inet_ntoa( visionNetwork.clients[i].con_info.sin_addr ), ntohs( visionNetwork.clients[i].con_info.sin_port ) );
visionNetwork.clients[i].l_heartbeat = runTime();
}
}
void Z_CheckHeartBeat( void )
{
for ( int i = 0; i < CLIENTS; i++ )
{
if ( ( visionNetwork.clients[i].l_heartbeat + HEARTBEAT < runTime() && visionNetwork.clients[i].state > S_NONE ) && visionNetwork.clients[i].h_req == 0 )
{
char buf[BUF] = { 0 };
int len;
if ( len = snprintf( &buf, BUF, "hb %d", runTime() ) > 0 )
{
UDP_send( &visionNetwork.socket, buf, strlen( buf ) + 1, inet_ntoa( visionNetwork.clients[i].con_info.sin_addr ), ntohs( visionNetwork.clients[i].con_info.sin_port ) );
visionNetwork.clients[i].h_req = 1;
}
}
if ( (visionNetwork.clients[i].l_heartbeat + HEARTBEAT_KICK < runTime() && visionNetwork.clients[i].state > S_NONE) && visionNetwork.clients[i].h_req == 1 )
{
printf( "Entferne %s:%d[%d] aus dem Index (Kein Heartbeat)\n", inet_ntoa( visionNetwork.clients[i].con_info.sin_addr ), ntohs( visionNetwork.clients[i].con_info.sin_port), i );
UDP_send( &visionNetwork.socket, "disconnect", 11, inet_ntoa( visionNetwork.clients[i].con_info.sin_addr ), ntohs( visionNetwork.clients[i].con_info.sin_port ) );
char buf[BUF] = { 0 };
if ( snprintf( &buf, BUF, "%s wurde aus dem visionNetwork entfernt. (Kein Heartbeat)", visionNetwork.clients[i].uinfo.name ) > 0 )
{
Z_CleanUser( &visionNetwork, i, buf, PRINT_UI );
}
Z_UserInfos();
}
}
}
void Z_SendDisconnect( void ) {
for ( int i = 0; i < CLIENTS; i++ )
{
if( visionNetwork.clients[i].state > S_NONE )
UDP_send( &visionNetwork.socket, "disconnect", 11, inet_ntoa( visionNetwork.clients[i].con_info.sin_addr ), ntohs( visionNetwork.clients[i].con_info.sin_port ) );
}
}
void Z_CleanUser( visionNetwork_t *client, int id, char *msg, short type )
{
if ( type > PRINT_NONE )
Z_Print( msg, type );
memset( &client->clients[id].uinfo, 0, sizeof( userinfo_t ) );
memset( &client->clients[id], 0, sizeof( client_t ) );
client->clients[id].l_heartbeat = -1;
client->clients[id].state = S_NONE;
}
void Z_Print( char *msg, short type ) {
char buf[BUF] = { 0 };
if ( snprintf( &buf, BUF, "print %d %s", type, msg ) > 0 )
{
for ( int j = 0; j < CLIENTS && visionNetwork.clients[j].state == S_AUTH; j++ )
UDP_send( &visionNetwork.socket, buf, strlen( buf ) + 1, inet_ntoa( visionNetwork.clients[j].con_info.sin_addr ), ntohs( visionNetwork.clients[j].con_info.sin_port ) );
}
}