/* Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 2002 Mathieu Olivier Copyright (C) 2003 Forest Hale This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "quakedef.h" #include "lhnet.h" #define MASTER_PORT 27950 // note this defaults on for dedicated servers, off for listen servers cvar_t sv_public = {0, "sv_public", "0"}; static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "120"}; // FIXME: resolve DNS on masters whenever their value changes and cache it (to avoid major delays in active servers when they heartbeat) static cvar_t sv_masters [] = { {CVAR_SAVE, "sv_master1", ""}, {CVAR_SAVE, "sv_master2", ""}, {CVAR_SAVE, "sv_master3", ""}, {CVAR_SAVE, "sv_master4", ""}, {0, "sv_masterextra1", "ghdigital.com"}, //69.59.212.88 {0, "sv_masterextra2", "dpmaster.deathmask.net"}, //66.169.205.20 {0, "sv_masterextra3", "12.166.196.192"}, //blaze.mindphukd.org (doesn't resolve currently but works as an ip) {0, NULL, NULL} }; static double nextheartbeattime = 0; sizebuf_t net_message; static unsigned char net_message_buf[NET_MAXMESSAGE]; cvar_t net_messagetimeout = {0, "net_messagetimeout","300"}; cvar_t net_messagerejointimeout = {0, "net_messagerejointimeout","10"}; cvar_t net_connecttimeout = {0, "net_connecttimeout","10"}; cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED"}; cvar_t developer_networking = {0, "developer_networking", "0"}; cvar_t cl_netlocalping = {0, "cl_netlocalping","0"}; static cvar_t cl_netpacketloss = {0, "cl_netpacketloss","0"}; static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20"}; static cvar_t net_slist_queriesperframe = {0, "net_slist_queriesperframe", "4"}; static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4"}; static cvar_t net_slist_maxtries = {0, "net_slist_maxtries", "3"}; /* statistic counters */ static int packetsSent = 0; static int packetsReSent = 0; static int packetsReceived = 0; static int receivedDuplicateCount = 0; static int droppedDatagrams = 0; static int unreliableMessagesSent = 0; static int unreliableMessagesReceived = 0; static int reliableMessagesSent = 0; static int reliableMessagesReceived = 0; double masterquerytime = -1000; int masterquerycount = 0; int masterreplycount = 0; int serverquerycount = 0; int serverreplycount = 0; // this is only false if there are still servers left to query int serverlist_querysleep = true; static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE]; static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE]; int cl_numsockets; lhnetsocket_t *cl_sockets[16]; int sv_numsockets; lhnetsocket_t *sv_sockets[16]; netconn_t *netconn_list = NULL; mempool_t *netconn_mempool = NULL; cvar_t cl_netport = {0, "cl_port", "0"}; cvar_t sv_netport = {0, "port", "26000"}; cvar_t net_address = {0, "net_address", "0.0.0.0"}; //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]"}; // ServerList interface serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT]; serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT]; serverlist_infofield_t serverlist_sortbyfield; qboolean serverlist_sortdescending; int serverlist_viewcount = 0; serverlist_entry_t *serverlist_viewlist[SERVERLIST_VIEWLISTSIZE]; int serverlist_cachecount; serverlist_entry_t serverlist_cache[SERVERLIST_TOTALSIZE]; qboolean serverlist_consoleoutput; // helper function to insert a value into the viewset // spare entries will be removed static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry ) { int i; if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) { i = serverlist_viewcount++; } else { i = SERVERLIST_VIEWLISTSIZE - 1; } for( ; i > index ; i-- ) serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ]; serverlist_viewlist[index] = entry; } // we suppose serverlist_viewcount to be valid, ie > 0 static void _ServerList_ViewList_Helper_Remove( int index ) { serverlist_viewcount--; for( ; index < serverlist_viewcount ; index++ ) serverlist_viewlist[index] = serverlist_viewlist[index + 1]; } // returns true if A should be inserted before B static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B ) { int result = 0; // > 0 if for numbers A > B and for text if A < B switch( serverlist_sortbyfield ) { case SLIF_PING: result = A->info.ping - B->info.ping; break; case SLIF_MAXPLAYERS: result = A->info.maxplayers - B->info.maxplayers; break; case SLIF_NUMPLAYERS: result = A->info.numplayers - B->info.numplayers; break; case SLIF_PROTOCOL: result = A->info.protocol - B->info.protocol; break; case SLIF_CNAME: result = strcmp( B->info.cname, A->info.cname ); break; case SLIF_GAME: result = strcmp( B->info.game, A->info.game ); break; case SLIF_MAP: result = strcmp( B->info.map, A->info.map ); break; case SLIF_MOD: result = strcmp( B->info.mod, A->info.mod ); break; case SLIF_NAME: result = strcmp( B->info.name, A->info.name ); break; default: Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" ); break; } if( serverlist_sortdescending ) return result > 0; return result < 0; } static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B ) { // This should actually be done with some intermediate and end-of-function return switch( op ) { case SLMO_LESS: return A < B; case SLMO_LESSEQUAL: return A <= B; case SLMO_EQUAL: return A == B; case SLMO_GREATER: return A > B; case SLMO_NOTEQUAL: return A != B; case SLMO_GREATEREQUAL: case SLMO_CONTAINS: case SLMO_NOTCONTAIN: return A >= B; default: Con_DPrint( "_ServerList_CompareInt: Bad op!\n" ); return false; } } static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B ) { int i; char bufferA[ 256 ], bufferB[ 256 ]; // should be more than enough for (i = 0;i < (int)sizeof(bufferA)-1 && A[i];i++) bufferA[i] = (A[i] >= 'A' && A[i] <= 'Z') ? (A[i] + 'a' - 'A') : A[i]; bufferA[i] = 0; for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++) bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i]; bufferB[i] = 0; // Same here, also using an intermediate & final return would be more appropriate // A info B mask switch( op ) { case SLMO_CONTAINS: return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool case SLMO_NOTCONTAIN: return !*bufferB || !strstr( bufferA, bufferB ); case SLMO_LESS: return strcmp( bufferA, bufferB ) < 0; case SLMO_LESSEQUAL: return strcmp( bufferA, bufferB ) <= 0; case SLMO_EQUAL: return strcmp( bufferA, bufferB ) == 0; case SLMO_GREATER: return strcmp( bufferA, bufferB ) > 0; case SLMO_NOTEQUAL: return strcmp( bufferA, bufferB ) != 0; case SLMO_GREATEREQUAL: return strcmp( bufferA, bufferB ) >= 0; default: Con_DPrint( "_ServerList_CompareStr: Bad op!\n" ); return false; } } static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info ) { if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) ) return false; if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) ) return false; if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) ) return false; if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol )) return false; if( *mask->info.cname && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) ) return false; if( *mask->info.game && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) ) return false; if( *mask->info.mod && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) ) return false; if( *mask->info.map && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) ) return false; if( *mask->info.name && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) ) return false; return true; } static void ServerList_ViewList_Insert( serverlist_entry_t *entry ) { int start, end, mid; // FIXME: change this to be more readable (...) // now check whether it passes through the masks for( start = 0 ; serverlist_andmasks[start].active && start < SERVERLIST_ANDMASKCOUNT ; start++ ) if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) ) return; for( start = 0 ; serverlist_ormasks[start].active && start < SERVERLIST_ORMASKCOUNT ; start++ ) if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) ) break; if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) ) return; if( !serverlist_viewcount ) { _ServerList_ViewList_Helper_InsertBefore( 0, entry ); return; } // ok, insert it, we just need to find out where exactly: // two special cases // check whether to insert it as new first item if( _ServerList_Entry_Compare( entry, serverlist_viewlist[0] ) ) { _ServerList_ViewList_Helper_InsertBefore( 0, entry ); return; } // check whether to insert it as new last item else if( !_ServerList_Entry_Compare( entry, serverlist_viewlist[serverlist_viewcount - 1] ) ) { _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry ); return; } start = 0; end = serverlist_viewcount - 1; while( end > start + 1 ) { mid = (start + end) / 2; // test the item that lies in the middle between start and end if( _ServerList_Entry_Compare( entry, serverlist_viewlist[mid] ) ) // the item has to be in the upper half end = mid; else // the item has to be in the lower half start = mid; } _ServerList_ViewList_Helper_InsertBefore( start + 1, entry ); } static void ServerList_ViewList_Remove( serverlist_entry_t *entry ) { int i; for( i = 0; i < serverlist_viewcount; i++ ) { if (serverlist_viewlist[i] == entry) { _ServerList_ViewList_Helper_Remove(i); break; } } } void ServerList_RebuildViewList(void) { int i; serverlist_viewcount = 0; for( i = 0 ; i < serverlist_cachecount ; i++ ) if( serverlist_cache[i].query == SQS_QUERIED ) ServerList_ViewList_Insert( &serverlist_cache[i] ); } void ServerList_ResetMasks(void) { memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) ); memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) ); } #if 0 static void _ServerList_Test(void) { int i; for( i = 0 ; i < 1024 ; i++ ) { memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) ); serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i; dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, 128, "Black's ServerList Test %i", i ); serverlist_cache[serverlist_cachecount].finished = true; sprintf( serverlist_cache[serverlist_cachecount].line1, "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name ); ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] ); serverlist_cachecount++; } } #endif void ServerList_QueryList(void) { masterquerytime = realtime; masterquerycount = 0; masterreplycount = 0; serverquerycount = 0; serverreplycount = 0; serverlist_cachecount = 0; serverlist_viewcount = 0; serverlist_consoleoutput = false; //_ServerList_Test(); NetConn_QueryMasters(); } // rest int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress) { int length = LHNET_Read(mysocket, data, maxlength, peeraddress); int i; if (length == 0) return 0; if (cl_netpacketloss.integer) for (i = 0;i < cl_numsockets;i++) if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer) return 0; if (developer_networking.integer) { char addressstring[128], addressstring2[128]; LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true); if (length > 0) { LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2); Com_HexDumpToConsole((unsigned char *)data, length); } else Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length); } return length; } int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress) { int ret; int i; if (cl_netpacketloss.integer) for (i = 0;i < cl_numsockets;i++) if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer) return length; ret = LHNET_Write(mysocket, data, length, peeraddress); if (developer_networking.integer) { char addressstring[128], addressstring2[128]; LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true); LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)"); Com_HexDumpToConsole((unsigned char *)data, length); } return ret; } int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress) { // note this does not include the trailing NULL because we add that in the parser return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress); } int NetConn_SendReliableMessage(netconn_t *conn, sizebuf_t *data) { unsigned int packetLen; unsigned int dataLen; unsigned int eom; unsigned int *header; //#ifdef DEBUG if (data->cursize == 0) { Con_Printf ("Datagram_SendMessage: zero length message\n"); return -1; } if (data->cursize > (int)sizeof(conn->sendMessage)) { Con_Printf ("Datagram_SendMessage: message too big (%u > %u)\n", data->cursize, sizeof(conn->sendMessage)); return -1; } if (conn->canSend == false) { Con_Printf ("SendMessage: called with canSend == false\n"); return -1; } //#endif memcpy(conn->sendMessage, data->data, data->cursize); conn->sendMessageLength = data->cursize; if (conn->sendMessageLength <= MAX_PACKETFRAGMENT) { dataLen = conn->sendMessageLength; eom = NETFLAG_EOM; } else { dataLen = MAX_PACKETFRAGMENT; eom = 0; } packetLen = NET_HEADERSIZE + dataLen; header = (unsigned int *)sendbuffer; header[0] = BigLong(packetLen | (NETFLAG_DATA | eom)); header[1] = BigLong(conn->sendSequence); memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen); conn->sendSequence++; conn->canSend = false; if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen) return -1; conn->lastSendTime = realtime; packetsSent++; reliableMessagesSent++; return 1; } static void NetConn_SendMessageNext(netconn_t *conn) { unsigned int packetLen; unsigned int dataLen; unsigned int eom; unsigned int *header; if (conn->sendMessageLength && !conn->canSend && conn->sendNext) { if (conn->sendMessageLength <= MAX_PACKETFRAGMENT) { dataLen = conn->sendMessageLength; eom = NETFLAG_EOM; } else { dataLen = MAX_PACKETFRAGMENT; eom = 0; } packetLen = NET_HEADERSIZE + dataLen; header = (unsigned int *)sendbuffer; header[0] = BigLong(packetLen | (NETFLAG_DATA | eom)); header[1] = BigLong(conn->sendSequence); memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen); conn->sendSequence++; conn->sendNext = false; if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen) return; conn->lastSendTime = realtime; packetsSent++; } } static void NetConn_ReSendMessage(netconn_t *conn) { unsigned int packetLen; unsigned int dataLen; unsigned int eom; unsigned int *header; if (conn->sendMessageLength && !conn->canSend && (realtime - conn->lastSendTime) > 1.0) { if (conn->sendMessageLength <= MAX_PACKETFRAGMENT) { dataLen = conn->sendMessageLength; eom = NETFLAG_EOM; } else { dataLen = MAX_PACKETFRAGMENT; eom = 0; } packetLen = NET_HEADERSIZE + dataLen; header = (unsigned int *)sendbuffer; header[0] = BigLong(packetLen | (NETFLAG_DATA | eom)); header[1] = BigLong(conn->sendSequence - 1); memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen); conn->sendNext = false; if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen) return; conn->lastSendTime = realtime; packetsReSent++; } } qboolean NetConn_CanSendMessage(netconn_t *conn) { return conn->canSend; } int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data) { int packetLen; unsigned int *header; packetLen = NET_HEADERSIZE + data->cursize; //#ifdef DEBUG if (data->cursize == 0) { Con_Printf ("Datagram_SendUnreliableMessage: zero length message\n"); return -1; } if (packetLen > (int)sizeof(sendbuffer)) { Con_Printf ("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize); return -1; } //#endif header = (unsigned int *)sendbuffer; header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE); header[1] = BigLong(conn->unreliableSendSequence); memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize); conn->unreliableSendSequence++; if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen) return -1; packetsSent++; unreliableMessagesSent++; return 1; } void NetConn_CloseClientPorts(void) { for (;cl_numsockets > 0;cl_numsockets--) if (cl_sockets[cl_numsockets - 1]) LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]); } void NetConn_OpenClientPort(const char *addressstring, int defaultport) { lhnetaddress_t address; lhnetsocket_t *s; char addressstring2[1024]; if (LHNETADDRESS_FromString(&address, addressstring, defaultport)) { if ((s = LHNET_OpenSocket_Connectionless(&address))) { cl_sockets[cl_numsockets++] = s; LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true); Con_Printf("Client opened a socket on address %s\n", addressstring2); } else { LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true); Con_Printf("Client failed to open a socket on address %s\n", addressstring2); } } else Con_Printf("Client unable to parse address %s\n", addressstring); } void NetConn_OpenClientPorts(void) { int port; NetConn_CloseClientPorts(); port = bound(0, cl_netport.integer, 65535); if (cl_netport.integer != port) Cvar_SetValueQuick(&cl_netport, port); Con_Printf("Client using port %i\n", port); NetConn_OpenClientPort("local:2", 0); NetConn_OpenClientPort(net_address.string, port); //NetConn_OpenClientPort(net_address_ipv6.string, port); } void NetConn_CloseServerPorts(void) { for (;sv_numsockets > 0;sv_numsockets--) if (sv_sockets[sv_numsockets - 1]) LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]); } void NetConn_OpenServerPort(const char *addressstring, int defaultport) { lhnetaddress_t address; lhnetsocket_t *s; int port; char addressstring2[1024]; for (port = defaultport; port <= defaultport + 100; port++) { if (LHNETADDRESS_FromString(&address, addressstring, port)) { if ((s = LHNET_OpenSocket_Connectionless(&address))) { sv_sockets[sv_numsockets++] = s; LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true); Con_Printf("Server listening on address %s\n", addressstring2); break; } else { LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true); Con_Printf("Server failed to open socket on address %s\n", addressstring2); } } else { Con_Printf("Server unable to parse address %s\n", addressstring); // if it cant parse one address, it wont be able to parse another for sure break; } } } static void NetConn_UpdateServerStuff(void); void NetConn_OpenServerPorts(int opennetports) { int port; NetConn_CloseServerPorts(); NetConn_UpdateServerStuff(); port = bound(0, sv_netport.integer, 65535); if (port == 0) port = 26000; Con_Printf("Server using port %i\n", port); if (sv_netport.integer != port) Cvar_SetValueQuick(&sv_netport, port); if (cls.state != ca_dedicated) NetConn_OpenServerPort("local:1", 0); if (opennetports) { NetConn_OpenServerPort(net_address.string, port); //NetConn_OpenServerPort(net_address_ipv6.string, port); } if (sv_numsockets == 0) Host_Error("NetConn_OpenServerPorts: unable to open any ports!"); } lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address) { int i, a = LHNETADDRESS_GetAddressType(address); for (i = 0;i < cl_numsockets;i++) if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a) return cl_sockets[i]; return NULL; } lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address) { int i, a = LHNETADDRESS_GetAddressType(address); for (i = 0;i < sv_numsockets;i++) if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a) return sv_sockets[i]; return NULL; } netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress) { netconn_t *conn; conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn)); conn->mysocket = mysocket; conn->peeraddress = *peeraddress; conn->canSend = true; conn->lastMessageTime = realtime; // LordHavoc: (inspired by ProQuake) use a short connect timeout to // reduce effectiveness of connection request floods conn->timeout = realtime + net_connecttimeout.value; LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true); conn->next = netconn_list; netconn_list = conn; return conn; } void NetConn_Close(netconn_t *conn) { netconn_t *c; // remove connection from list if (conn == netconn_list) netconn_list = conn->next; else { for (c = netconn_list;c;c = c->next) { if (c->next == conn) { c->next = conn->next; break; } } // not found in list, we'll avoid crashing here... if (!c) return; } // free connection Mem_Free(conn); } static int clientport = -1; static int clientport2 = -1; static int hostport = -1; static void NetConn_UpdateServerStuff(void) { if (cls.state != ca_dedicated) { if (clientport2 != cl_netport.integer) { clientport2 = cl_netport.integer; if (cls.state == ca_connected) Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n"); } if (cls.state == ca_disconnected && clientport != clientport2) { clientport = clientport2; NetConn_CloseClientPorts(); } if (cl_numsockets == 0) NetConn_OpenClientPorts(); } if (hostport != sv_netport.integer) { hostport = sv_netport.integer; if (sv.active) Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n"); } } int NetConn_ReceivedMessage(netconn_t *conn, unsigned char *data, int length) { unsigned int count; unsigned int flags; unsigned int sequence; int qlength; if (length >= 8) { qlength = (unsigned int)BigLong(((int *)data)[0]); flags = qlength & ~NETFLAG_LENGTH_MASK; qlength &= NETFLAG_LENGTH_MASK; // control packets were already handled if (!(flags & NETFLAG_CTL) && qlength == length) { sequence = BigLong(((int *)data)[1]); packetsReceived++; data += 8; length -= 8; if (flags & NETFLAG_UNRELIABLE) { if (sequence >= conn->unreliableReceiveSequence) { if (sequence > conn->unreliableReceiveSequence) { count = sequence - conn->unreliableReceiveSequence; droppedDatagrams += count; Con_DPrintf("Dropped %u datagram(s)\n", count); } conn->unreliableReceiveSequence = sequence + 1; conn->lastMessageTime = realtime; conn->timeout = realtime + net_messagetimeout.value; unreliableMessagesReceived++; if (length > 0) { SZ_Clear(&net_message); SZ_Write(&net_message, data, length); MSG_BeginReading(); return 2; } } else Con_DPrint("Got a stale datagram\n"); return 1; } else if (flags & NETFLAG_ACK) { if (sequence == (conn->sendSequence - 1)) { if (sequence == conn->ackSequence) { conn->ackSequence++; if (conn->ackSequence != conn->sendSequence) Con_DPrint("ack sequencing error\n"); conn->lastMessageTime = realtime; conn->timeout = realtime + net_messagetimeout.value; conn->sendMessageLength -= MAX_PACKETFRAGMENT; if (conn->sendMessageLength > 0) { memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength); conn->sendNext = true; NetConn_SendMessageNext(conn); } else { conn->sendMessageLength = 0; conn->canSend = true; } } else Con_DPrint("Duplicate ACK received\n"); } else Con_DPrint("Stale ACK received\n"); return 1; } else if (flags & NETFLAG_DATA) { unsigned int temppacket[2]; temppacket[0] = BigLong(8 | NETFLAG_ACK); temppacket[1] = BigLong(sequence); NetConn_Write(conn->mysocket, (unsigned char *)temppacket, 8, &conn->peeraddress); if (sequence == conn->receiveSequence) { conn->lastMessageTime = realtime; conn->timeout = realtime + net_messagetimeout.value; conn->receiveSequence++; if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) { memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length); conn->receiveMessageLength += length; } else { Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n" "Dropping the message!\n", sequence ); conn->receiveMessageLength = 0; return 1; } if (flags & NETFLAG_EOM) { reliableMessagesReceived++; length = conn->receiveMessageLength; conn->receiveMessageLength = 0; if (length > 0) { SZ_Clear(&net_message); SZ_Write(&net_message, conn->receiveMessage, length); MSG_BeginReading(); return 2; } } } else receivedDuplicateCount++; return 1; } } } return 0; } void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress) { cls.connect_trying = false; M_Update_Return_Reason(""); // the connection request succeeded, stop current connection and set up a new connection CL_Disconnect(); // if we're connecting to a remote server, shut down any local server if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active) Host_ShutdownServer (false); // allocate a net connection to keep track of things cls.netcon = NetConn_Open(mysocket, peeraddress); Con_Printf("Connection accepted to %s\n", cls.netcon->address); key_dest = key_game; m_state = m_none; cls.demonum = -1; // not in the demo loop now cls.state = ca_connected; cls.signon = 0; // need all the signon messages before playing } int NetConn_IsLocalGame(void) { if (cls.state == ca_connected && sv.active && cl.maxclients == 1) return true; return false; } int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress) { int ret, c, control; const char *s; char *string, addressstring2[128], cname[128], ipstring[32]; char stringbuf[16384]; if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255) { // received a command string - strip off the packaging and put it // into our string buffer with NULL termination data += 4; length -= 4; length = min(length, (int)sizeof(stringbuf) - 1); memcpy(stringbuf, data, length); stringbuf[length] = 0; string = stringbuf; if (developer.integer) { LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2); Com_HexDumpToConsole(data, length); } if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying) { char protocolnames[1400]; Protocol_Names(protocolnames, sizeof(protocolnames)); LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2); M_Update_Return_Reason("Got challenge response"); NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s\\challenge\\%s", protocolnames, string + 10), peeraddress); return true; } if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying) { M_Update_Return_Reason("Accepted"); NetConn_ConnectionEstablished(mysocket, peeraddress); return true; } if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying) { char rejectreason[32]; cls.connect_trying = false; string += 7; length = max(length - 7, (int)sizeof(rejectreason) - 1); memcpy(rejectreason, string, length); rejectreason[length] = 0; M_Update_Return_Reason(rejectreason); return true; } if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13)) { serverlist_info_t *info; int i, n; double pingtime; string += 13; // serverlist only uses text addresses LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true); // search the cache for this server and update it for( n = 0; n < serverlist_cachecount; n++ ) if( !strcmp( cname, serverlist_cache[n].info.cname ) ) break; if( n == serverlist_cachecount ) { // LAN search doesnt require an answer from the master server so we wont // know the ping nor will it be initialized already... // find a slot if( serverlist_cachecount == SERVERLIST_TOTALSIZE ) return true; memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount])); // store the data the engine cares about (address and ping) strlcpy (serverlist_cache[serverlist_cachecount].info.cname, cname, sizeof (serverlist_cache[serverlist_cachecount].info.cname)); serverlist_cache[serverlist_cachecount].info.ping = 100000; serverlist_cache[serverlist_cachecount].querytime = realtime; // if not in the slist menu we should print the server to console if (serverlist_consoleoutput) { Con_Printf("querying %s\n", ipstring); } ++serverlist_cachecount; } info = &serverlist_cache[n].info; if ((s = SearchInfostring(string, "gamename" )) != NULL) strlcpy(info->game, s, sizeof (info->game));else info->game[0] = 0; if ((s = SearchInfostring(string, "modname" )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0] = 0; if ((s = SearchInfostring(string, "mapname" )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0] = 0; if ((s = SearchInfostring(string, "hostname" )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0; if ((s = SearchInfostring(string, "protocol" )) != NULL) info->protocol = atoi(s);else info->protocol = -1; if ((s = SearchInfostring(string, "clients" )) != NULL) info->numplayers = atoi(s);else info->numplayers = 0; if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);else info->maxplayers = 0; if (info->ping == 100000) serverreplycount++; pingtime = (int)((realtime - serverlist_cache[n].querytime) * 1000.0); pingtime = bound(0, pingtime, 9999); // update the ping info->ping = pingtime; // legacy/old stuff move it to the menu ASAP // build description strings for the things users care about dpsnprintf(serverlist_cache[n].line1, sizeof(serverlist_cache[n].line1), "%5d%c%3u/%3u %-65.65s", (int)pingtime, info->protocol != NET_PROTOCOL_VERSION ? '*' : ' ', info->numplayers, info->maxplayers, info->name); dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "%-21.21s %-19.19s %-17.17s %-20.20s", info->cname, info->game, info->mod, info->map); // if ping is especially high, display it as such if (pingtime >= 300) { // orange numbers (lower block) for (i = 0;i < 5;i++) if (serverlist_cache[n].line1[i] != ' ') serverlist_cache[n].line1[i] += 128; } else if (pingtime >= 200) { // yellow numbers (in upper block) for (i = 0;i < 5;i++) if (serverlist_cache[n].line1[i] != ' ') serverlist_cache[n].line1[i] -= 30; } if( serverlist_cache[n].query == SQS_QUERIED ) { ServerList_ViewList_Remove( &serverlist_cache[n] ); } // if not in the slist menu we should print the server to console (if wanted) else if( serverlist_consoleoutput ) Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2); // and finally, update the view set ServerList_ViewList_Insert( &serverlist_cache[n] ); serverlist_cache[n].query = SQS_QUERIED; return true; } if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE) { // Extract the IP addresses data += 18; length -= 18; masterreplycount++; if (serverlist_consoleoutput) Con_Print("received server list...\n"); while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0) { int n; dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], (data[5] << 8) | data[6]); if (developer.integer) Con_Printf("Requesting info from server %s\n", ipstring); // ignore the rest of the message if the serverlist is full if( serverlist_cachecount == SERVERLIST_TOTALSIZE ) break; // also ignore it if we have already queried it (other master server response) for( n = 0 ; n < serverlist_cachecount ; n++ ) if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) ) break; if( n >= serverlist_cachecount ) { serverquerycount++; memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount])); // store the data the engine cares about (address and ping) strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname)); serverlist_cache[serverlist_cachecount].info.ping = 100000; serverlist_cache[serverlist_cachecount].query = SQS_QUERYING; ++serverlist_cachecount; } // move on to next address in packet data += 7; length -= 7; } // begin or resume serverlist queries serverlist_querysleep = false; return true; } /* if (!strncmp(string, "ping", 4)) { if (developer.integer) Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr)); NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress); return true; } if (!strncmp(string, "ack", 3)) return true; */ // we may not have liked the packet, but it was a command packet, so // we're done processing this packet now return true; } // netquake control packets, supported for compatibility only if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length) { c = data[4]; data += 5; length -= 5; LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); switch (c) { case CCREP_ACCEPT: if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2); if (cls.connect_trying) { lhnetaddress_t clientportaddress; clientportaddress = *peeraddress; if (length >= 4) { unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24); data += 4; length -= 4; LHNETADDRESS_SetPort(&clientportaddress, port); } M_Update_Return_Reason("Accepted"); NetConn_ConnectionEstablished(mysocket, &clientportaddress); } break; case CCREP_REJECT: if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2); cls.connect_trying = false; M_Update_Return_Reason((char *)data); break; #if 0 case CCREP_SERVER_INFO: if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2); if (cls.state != ca_dedicated) { // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address // string we just ignore it and keep the real address MSG_ReadString(); // serverlist only uses text addresses cname = UDP_AddrToString(readaddr); // search the cache for this server for (n = 0; n < hostCacheCount; n++) if (!strcmp(cname, serverlist[n].cname)) break; // add it if (n == hostCacheCount && hostCacheCount < SERVERLISTSIZE) { hostCacheCount++; memset(&serverlist[n], 0, sizeof(serverlist[n])); strlcpy (serverlist[n].name, MSG_ReadString(), sizeof (serverlist[n].name)); strlcpy (serverlist[n].map, MSG_ReadString(), sizeof (serverlist[n].map)); serverlist[n].users = MSG_ReadByte(); serverlist[n].maxusers = MSG_ReadByte(); c = MSG_ReadByte(); if (c != NET_PROTOCOL_VERSION) { strlcpy (serverlist[n].cname, serverlist[n].name, sizeof (serverlist[n].cname)); strcpy(serverlist[n].name, "*"); strlcat (serverlist[n].name, serverlist[n].cname, sizeof(serverlist[n].name)); } strlcpy (serverlist[n].cname, cname, sizeof (serverlist[n].cname)); } } break; case CCREP_PLAYER_INFO: // we got a CCREP_PLAYER_INFO?? //if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2); break; case CCREP_RULE_INFO: // we got a CCREP_RULE_INFO?? //if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2); break; #endif default: break; } // we may not have liked the packet, but it was a valid control // packet, so we're done processing this packet now return true; } ret = 0; if (length >= (int)NET_HEADERSIZE && cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress) && (ret = NetConn_ReceivedMessage(cls.netcon, data, length)) == 2) CL_ParseServerMessage(); return ret; } void NetConn_QueryQueueFrame(void) { int index; int queries; int maxqueries; double timeouttime; static double querycounter = 0; if (serverlist_querysleep) return; // each time querycounter reaches 1.0 issue a query querycounter += host_realframetime * net_slist_queriespersecond.value; maxqueries = (int)querycounter; maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer); querycounter -= maxqueries; if( maxqueries == 0 ) { return; } // scan serverlist and issue queries as needed serverlist_querysleep = true; timeouttime = realtime - net_slist_timeout.value; for( index = 0, queries = 0 ; index < serverlist_cachecount && queries < maxqueries ; index++ ) { serverlist_entry_t *entry = &serverlist_cache[ index ]; if( entry->query != SQS_QUERYING ) { continue; } serverlist_querysleep = false; if( entry->querycounter != 0 && entry->querytime > timeouttime ) { continue; } if( entry->querycounter != (unsigned) net_slist_maxtries.integer ) { lhnetaddress_t address; int socket; LHNETADDRESS_FromString(&address, entry->info.cname, 0); for (socket = 0; socket < cl_numsockets ; socket++) { NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getinfo", &address); } entry->querytime = realtime; entry->querycounter++; // if not in the slist menu we should print the server to console if (serverlist_consoleoutput) Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter); queries++; } else { entry->query = SQS_TIMEDOUT; } } } void NetConn_ClientFrame(void) { int i, length; lhnetaddress_t peeraddress; netconn_t *conn; NetConn_UpdateServerStuff(); if (cls.connect_trying && cls.connect_nextsendtime < realtime) { if (cls.connect_remainingtries == 0) M_Update_Return_Reason("Connect: Waiting 10 seconds for reply"); cls.connect_nextsendtime = realtime + 1; cls.connect_remainingtries--; if (cls.connect_remainingtries <= -10) { cls.connect_trying = false; M_Update_Return_Reason("Connect: Failed"); return; } // try challenge first (newer server) NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address); // then try netquake as a fallback (old server, or netquake) SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREQ_CONNECT); MSG_WriteString(&net_message, "QUAKE"); MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address); SZ_Clear(&net_message); } for (i = 0;i < cl_numsockets;i++) { while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0) { NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress); } } NetConn_QueryQueueFrame(); if (cls.netcon && realtime > cls.netcon->timeout) { Con_Print("Connection timed out\n"); CL_Disconnect(); Host_ShutdownServer (false); } for (conn = netconn_list;conn;conn = conn->next) NetConn_ReSendMessage(conn); } #define MAX_CHALLENGES 128 struct challenge_s { lhnetaddress_t address; double time; char string[12]; } challenge[MAX_CHALLENGES]; static void NetConn_BuildChallengeString(char *buffer, int bufferlength) { int i; char c; for (i = 0;i < bufferlength - 1;i++) { do { c = rand () % (127 - 33) + 33; } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/'); buffer[i] = c; } buffer[i] = 0; } static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus) { unsigned int nb_clients = 0, i; int length; // How many clients are there? for (i = 0;i < (unsigned int)svs.maxclients;i++) if (svs.clients[i].active) nb_clients++; // TODO: we should add more information for the full status string length = dpsnprintf(out_msg, out_size, "\377\377\377\377%s\x0A" "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d" "\\clients\\%d\\mapname\\%s\\hostname\\%s""\\protocol\\%d" "%s%s" "%s", fullstatus ? "statusResponse" : "infoResponse", gamename, com_modname, svs.maxclients, nb_clients, sv.name, hostname.string, NET_PROTOCOL_VERSION, challenge ? "\\challenge\\" : "", challenge ? challenge : "", fullstatus ? "\n" : ""); // Make sure it fits in the buffer if (length < 0) return false; if (fullstatus) { char *ptr; int left; ptr = out_msg + length; left = (int)out_size - length; for (i = 0;i < (unsigned int)svs.maxclients;i++) { client_t *cl = &svs.clients[i]; if (cl->active) { int nameind, cleanind; char curchar; char cleanname [sizeof(cl->name)]; // Remove all characters '"' and '\' in the player name nameind = 0; cleanind = 0; do { curchar = cl->name[nameind++]; if (curchar != '"' && curchar != '\\') { cleanname[cleanind++] = curchar; if (cleanind == sizeof(cleanname) - 1) break; } } while (curchar != '\0'); length = dpsnprintf(ptr, left, "%d %d \"%s\"\n", cl->frags, (int)(cl->ping * 1000.0f), cleanname); if(length < 0) return false; left -= length; ptr += length; } } } return true; } extern void SV_SendServerinfo (client_t *client); int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress) { int i, ret, clientnum, best; double besttime; client_t *client; netconn_t *conn; char *s, *string, response[512], addressstring2[128], stringbuf[16384]; if (sv.active) { if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255) { // received a command string - strip off the packaging and put it // into our string buffer with NULL termination data += 4; length -= 4; length = min(length, (int)sizeof(stringbuf) - 1); memcpy(stringbuf, data, length); stringbuf[length] = 0; string = stringbuf; if (developer.integer) { LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2); Com_HexDumpToConsole(data, length); } if (length >= 12 && !memcmp(string, "getchallenge", 12)) { for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++) { if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address)) break; if (besttime > challenge[i].time) besttime = challenge[best = i].time; } // if we did not find an exact match, choose the oldest and // update address and string if (i == MAX_CHALLENGES) { i = best; challenge[i].address = *peeraddress; NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string)); } challenge[i].time = realtime; // send the challenge NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress); return true; } if (length > 8 && !memcmp(string, "connect\\", 8)) { string += 7; length -= 7; if ((s = SearchInfostring(string, "challenge"))) { // validate the challenge for (i = 0;i < MAX_CHALLENGES;i++) if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s)) break; if (i < MAX_CHALLENGES) { // check engine protocol if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3")) { if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress); } else { // see if this is a duplicate connection request for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0) break; if (clientnum < svs.maxclients && realtime - client->connecttime < net_messagerejointimeout.value) { // client is still trying to connect, // so we send a duplicate reply if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress); } #if 0 else if (clientnum < svs.maxclients) { if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value) { // client crashed and is coming back, keep their stuff intact SV_SendServerinfo(client); //host_client = client; //SV_DropClient (true); } // else ignore them } #endif else { // this is a new client, find a slot for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) if (!client->active) break; if (clientnum < svs.maxclients) { // prepare the client struct if ((conn = NetConn_Open(mysocket, peeraddress))) { // allocated connection LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true); if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address); NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress); // now set up the client SV_ConnectClient(clientnum, conn); NetConn_Heartbeat(1); } } else { // server is full if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress); } } } } } return true; } if (length >= 7 && !memcmp(string, "getinfo", 7)) { const char *challenge = NULL; // If there was a challenge in the getinfo message if (length > 8 && string[7] == ' ') challenge = string + 8; if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false)) { if (developer.integer) Con_Printf("Sending reply to master %s - %s\n", addressstring2, response); NetConn_WriteString(mysocket, response, peeraddress); } return true; } if (length >= 9 && !memcmp(string, "getstatus", 9)) { const char *challenge = NULL; // If there was a challenge in the getinfo message if (length > 10 && string[9] == ' ') challenge = string + 10; if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true)) { if (developer.integer) Con_Printf("Sending reply to client %s - %s\n", addressstring2, response); NetConn_WriteString(mysocket, response, peeraddress); } return true; } /* if (!strncmp(string, "ping", 4)) { if (developer.integer) Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr)); NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress); return true; } if (!strncmp(string, "ack", 3)) return true; */ // we may not have liked the packet, but it was a command packet, so // we're done processing this packet now return true; } // LordHavoc: disabled netquake control packet support in server #if 0 { int c, control; // netquake control packets, supported for compatibility only if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length) { c = data[4]; data += 5; length -= 5; LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); switch (c) { case CCREQ_CONNECT: //if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2); if (length >= (int)strlen("QUAKE") + 1 + 1) { if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION) { if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2); SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_REJECT); MSG_WriteString(&net_message, "Incompatible version.\n"); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } else { // see if this is a duplicate connection request for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0) break; if (clientnum < svs.maxclients) { // duplicate connection request if (realtime - client->connecttime < 2.0) { // client is still trying to connect, // so we send a duplicate reply if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2); SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_ACCEPT); MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket))); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } #if 0 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value) { SV_SendServerinfo(client); // the old client hasn't sent us anything // in quite a while, so kick off and let // the retry take care of it... //host_client = client; //SV_DropClient (true); } #endif } else { // this is a new client, find a slot for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) if (!client->active) break; if (clientnum < svs.maxclients && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL) { // connect to the client // everything is allocated, just fill in the details strlcpy (conn->address, addressstring2, sizeof (conn->address)); if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2); // send back the info about the server connection SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_ACCEPT); MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket))); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); // now set up the client struct SV_ConnectClient(clientnum, conn); NetConn_Heartbeat(1); } else { //if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2); // no room; try to let player know SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_REJECT); MSG_WriteString(&net_message, "Server is full.\n"); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } } } } break; #if 0 case CCREQ_SERVER_INFO: if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2); if (sv.active && !strcmp(MSG_ReadString(), "QUAKE")) { if (developer.integer) Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2); SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_SERVER_INFO); UDP_GetSocketAddr(UDP_acceptSock, &newaddr); MSG_WriteString(&net_message, UDP_AddrToString(&newaddr)); MSG_WriteString(&net_message, hostname.string); MSG_WriteString(&net_message, sv.name); MSG_WriteByte(&net_message, net_activeconnections); MSG_WriteByte(&net_message, svs.maxclients); MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } break; case CCREQ_PLAYER_INFO: if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2); if (sv.active) { int playerNumber, activeNumber, clientNumber; client_t *client; playerNumber = MSG_ReadByte(); activeNumber = -1; for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++) if (client->active && ++activeNumber == playerNumber) break; if (clientNumber != svs.maxclients) { SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_PLAYER_INFO); MSG_WriteByte(&net_message, playerNumber); MSG_WriteString(&net_message, client->name); MSG_WriteLong(&net_message, client->colors); MSG_WriteLong(&net_message, (int)client->edict->fields.server->frags); MSG_WriteLong(&net_message, (int)(realtime - client->connecttime)); MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient"); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } } break; case CCREQ_RULE_INFO: if (developer.integer) Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2); if (sv.active) { char *prevCvarName; cvar_t *var; // find the search start location prevCvarName = MSG_ReadString(); var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY); // send the response SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_RULE_INFO); if (var) { MSG_WriteString(&net_message, var->name); MSG_WriteString(&net_message, var->string); } *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } break; #endif default: break; } // we may not have liked the packet, but it was a valid control // packet, so we're done processing this packet now return true; } } #endif for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++) { if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress)) { if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length)) == 2) SV_ReadClientMessage(); return ret; } } } return 0; } void NetConn_ServerFrame(void) { int i, length; lhnetaddress_t peeraddress; netconn_t *conn; NetConn_UpdateServerStuff(); for (i = 0;i < sv_numsockets;i++) while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0) NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress); for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++) { // never timeout loopback connections if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP) { Con_Printf("Client \"%s\" connection timed out\n", host_client->name); SV_DropClient(false); } } for (conn = netconn_list;conn;conn = conn->next) NetConn_ReSendMessage(conn); } void NetConn_QueryMasters(void) { int i; int masternum; lhnetaddress_t masteraddress; lhnetaddress_t broadcastaddress; char request[256]; if (serverlist_cachecount >= SERVERLIST_TOTALSIZE) return; // 26000 is the default quake server port, servers on other ports will not // be found // note this is IPv4-only, I doubt there are IPv6-only LANs out there LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000); for (i = 0;i < cl_numsockets;i++) { if (cl_sockets[i]) { // search LAN for Quake servers SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREQ_SERVER_INFO); MSG_WriteString(&net_message, "QUAKE"); MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION); *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress); SZ_Clear(&net_message); // search LAN for DarkPlaces servers NetConn_WriteString(cl_sockets[i], "\377\377\377\377getinfo", &broadcastaddress); // build the getservers message to send to the master servers dpsnprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION); // search internet for (masternum = 0;sv_masters[masternum].name;masternum++) { if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]))) { masterquerycount++; NetConn_WriteString(cl_sockets[i], request, &masteraddress); } } } } if (!masterquerycount) { Con_Print("Unable to query master servers, no suitable network sockets active.\n"); M_Update_Return_Reason("No network"); } } void NetConn_Heartbeat(int priority) { lhnetaddress_t masteraddress; int masternum; lhnetsocket_t *mysocket; // if it's a state change (client connected), limit next heartbeat to no // more than 30 sec in the future if (priority == 1 && nextheartbeattime > realtime + 30.0) nextheartbeattime = realtime + 30.0; // limit heartbeatperiod to 30 to 270 second range, // lower limit is to avoid abusing master servers with excess traffic, // upper limit is to avoid timing out on the master server (which uses // 300 sec timeout) if (sv_heartbeatperiod.value < 30) Cvar_SetValueQuick(&sv_heartbeatperiod, 30); if (sv_heartbeatperiod.value > 270) Cvar_SetValueQuick(&sv_heartbeatperiod, 270); // make advertising optional and don't advertise singleplayer games, and // only send a heartbeat as often as the admin wants if (sv.active && sv_public.integer && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime)) { nextheartbeattime = realtime + sv_heartbeatperiod.value; for (masternum = 0;sv_masters[masternum].name;masternum++) if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress))) NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress); } } int NetConn_SendToAll(sizebuf_t *data, double blocktime) { int i, count = 0; unsigned char sent[MAX_SCOREBOARD]; memset(sent, 0, sizeof(sent)); // simultaneously wait for the first CanSendMessage and send the message, // then wait for a second CanSendMessage (verifying it was received), or // the client drops and is no longer counted // the loop aborts when either it runs out of clients to send to, or a // timeout expires blocktime += Sys_DoubleTime(); do { count = 0; NetConn_ClientFrame(); NetConn_ServerFrame(); for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++) { if (host_client->netconnection) { if (NetConn_CanSendMessage(host_client->netconnection)) { if (!sent[i]) NetConn_SendReliableMessage(host_client->netconnection, data); sent[i] = true; } if (!NetConn_CanSendMessage(host_client->netconnection)) count++; } } } while (count && Sys_DoubleTime() < blocktime); return count; } static void Net_Heartbeat_f(void) { if (sv.active) NetConn_Heartbeat(2); else Con_Print("No server running, can not heartbeat to master server.\n"); } void PrintStats(netconn_t *conn) { Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, conn->canSend, conn->sendSequence, conn->receiveSequence); } void Net_Stats_f(void) { netconn_t *conn; Con_Printf("unreliable messages sent = %i\n", unreliableMessagesSent); Con_Printf("unreliable messages recv = %i\n", unreliableMessagesReceived); Con_Printf("reliable messages sent = %i\n", reliableMessagesSent); Con_Printf("reliable messages received = %i\n", reliableMessagesReceived); Con_Printf("packetsSent = %i\n", packetsSent); Con_Printf("packetsReSent = %i\n", packetsReSent); Con_Printf("packetsReceived = %i\n", packetsReceived); Con_Printf("receivedDuplicateCount = %i\n", receivedDuplicateCount); Con_Printf("droppedDatagrams = %i\n", droppedDatagrams); Con_Print("connections =\n"); for (conn = netconn_list;conn;conn = conn->next) PrintStats(conn); } void Net_Slist_f(void) { ServerList_ResetMasks(); serverlist_sortbyfield = SLIF_PING; serverlist_sortdescending = false; if (m_state != m_slist) { Con_Print("Sending requests to master servers\n"); ServerList_QueryList(); serverlist_consoleoutput = true; Con_Print("Listening for replies...\n"); } else ServerList_QueryList(); } void NetConn_Init(void) { int i; lhnetaddress_t tempaddress; netconn_mempool = Mem_AllocPool("network connections", 0, NULL); Cmd_AddCommand("net_stats", Net_Stats_f); Cmd_AddCommand("net_slist", Net_Slist_f); Cmd_AddCommand("heartbeat", Net_Heartbeat_f); Cvar_RegisterVariable(&net_slist_queriespersecond); Cvar_RegisterVariable(&net_slist_queriesperframe); Cvar_RegisterVariable(&net_slist_timeout); Cvar_RegisterVariable(&net_slist_maxtries); Cvar_RegisterVariable(&net_messagetimeout); Cvar_RegisterVariable(&net_messagerejointimeout); Cvar_RegisterVariable(&net_connecttimeout); Cvar_RegisterVariable(&cl_netlocalping); Cvar_RegisterVariable(&cl_netpacketloss); Cvar_RegisterVariable(&hostname); Cvar_RegisterVariable(&developer_networking); Cvar_RegisterVariable(&cl_netport); Cvar_RegisterVariable(&sv_netport); Cvar_RegisterVariable(&net_address); //Cvar_RegisterVariable(&net_address_ipv6); Cvar_RegisterVariable(&sv_public); Cvar_RegisterVariable(&sv_heartbeatperiod); for (i = 0;sv_masters[i].name;i++) Cvar_RegisterVariable(&sv_masters[i]); // COMMANDLINEOPTION: Server: -ip sets the ip address of this machine for purposes of networking (default 0.0.0.0 also known as INADDR_ANY), use only if you have multiple network adapters and need to choose one specifically. if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc) { if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1) { Con_Printf("-ip option used, setting net_address to \"%s\"\n"); Cvar_SetQuick(&net_address, com_argv[i + 1]); } else Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]); } // COMMANDLINEOPTION: Server: -port sets the port to use for a server (default 26000, the same port as QUAKE itself), useful if you host multiple servers on your machine if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc) { i = atoi(com_argv[i + 1]); if (i >= 0 && i < 65536) { Con_Printf("-port option used, setting port cvar to %i\n", i); Cvar_SetValueQuick(&sv_netport, i); } else Con_Printf("-port option used, but %i is not a valid port number\n", i); } cl_numsockets = 0; sv_numsockets = 0; net_message.data = net_message_buf; net_message.maxsize = sizeof(net_message_buf); net_message.cursize = 0; LHNET_Init(); } void NetConn_Shutdown(void) { NetConn_CloseClientPorts(); NetConn_CloseServerPorts(); LHNET_Shutdown(); }