/* Copyright (C) 1996-1997 Id Software, Inc. 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. */ // net_wins.c #include "quakedef.h" #include "winquake.h" extern cvar_t hostname; #define MAXHOSTNAMELEN 256 static int net_acceptsocket = -1; // socket for fielding new connections static int net_controlsocket; static int net_broadcastsocket = 0; static struct qsockaddr broadcastaddr; static unsigned long myAddr; qboolean winsock_lib_initialized; int (PASCAL FAR *pWSAStartup)(WORD wVersionRequired, LPWSADATA lpWSAData); int (PASCAL FAR *pWSACleanup)(void); int (PASCAL FAR *pWSAGetLastError)(void); SOCKET (PASCAL FAR *psocket)(int af, int type, int protocol); int (PASCAL FAR *pioctlsocket)(SOCKET s, long cmd, u_long FAR *argp); int (PASCAL FAR *psetsockopt)(SOCKET s, int level, int optname, const char FAR * optval, int optlen); int (PASCAL FAR *precvfrom)(SOCKET s, char FAR * buf, int len, int flags, struct sockaddr FAR *from, int FAR * fromlen); int (PASCAL FAR *psendto)(SOCKET s, const char FAR * buf, int len, int flags, const struct sockaddr FAR *to, int tolen); int (PASCAL FAR *pclosesocket)(SOCKET s); int (PASCAL FAR *pgethostname)(char FAR * name, int namelen); struct hostent FAR * (PASCAL FAR *pgethostbyname)(const char FAR * name); struct hostent FAR * (PASCAL FAR *pgethostbyaddr)(const char FAR * addr, int len, int type); int (PASCAL FAR *pgetsockname)(SOCKET s, struct sockaddr FAR *name, int FAR * namelen); #include "net_wins.h" int winsock_initialized = 0; WSADATA winsockdata; //============================================================================= static double blocktime; BOOL PASCAL FAR BlockingHook(void) { MSG msg; BOOL ret; if ((Sys_FloatTime() - blocktime) > 2.0) { WSACancelBlockingCall(); return FALSE; } /* get the next message, if any */ ret = (BOOL) PeekMessage(&msg, NULL, 0, 0, PM_REMOVE); /* if we got one, process it */ if (ret) { TranslateMessage(&msg); DispatchMessage(&msg); } /* TRUE if we got a message */ return ret; } void WINS_GetLocalAddress() { struct hostent *local = NULL; char buff[MAXHOSTNAMELEN]; unsigned long addr; if (myAddr != INADDR_ANY) return; if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR) return; blocktime = Sys_FloatTime(); WSASetBlockingHook(BlockingHook); local = pgethostbyname(buff); WSAUnhookBlockingHook(); if (local == NULL) return; myAddr = *(int *)local->h_addr_list[0]; addr = ntohl(myAddr); sprintf(my_tcpip_address, "%d.%d.%d.%d", (addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff); } int WINS_Init (void) { int i; char buff[MAXHOSTNAMELEN]; char *p; int r; WORD wVersionRequested; HINSTANCE hInst; // initialize the Winsock function vectors (we do this instead of statically linking // so we can run on Win 3.1, where there isn't necessarily Winsock) hInst = LoadLibrary("wsock32.dll"); if (hInst == NULL) { Con_SafePrintf ("Failed to load winsock.dll\n"); winsock_lib_initialized = false; return -1; } winsock_lib_initialized = true; pWSAStartup = (void *)GetProcAddress(hInst, "WSAStartup"); pWSACleanup = (void *)GetProcAddress(hInst, "WSACleanup"); pWSAGetLastError = (void *)GetProcAddress(hInst, "WSAGetLastError"); psocket = (void *)GetProcAddress(hInst, "socket"); pioctlsocket = (void *)GetProcAddress(hInst, "ioctlsocket"); psetsockopt = (void *)GetProcAddress(hInst, "setsockopt"); precvfrom = (void *)GetProcAddress(hInst, "recvfrom"); psendto = (void *)GetProcAddress(hInst, "sendto"); pclosesocket = (void *)GetProcAddress(hInst, "closesocket"); pgethostname = (void *)GetProcAddress(hInst, "gethostname"); pgethostbyname = (void *)GetProcAddress(hInst, "gethostbyname"); pgethostbyaddr = (void *)GetProcAddress(hInst, "gethostbyaddr"); pgetsockname = (void *)GetProcAddress(hInst, "getsockname"); if (!pWSAStartup || !pWSACleanup || !pWSAGetLastError || !psocket || !pioctlsocket || !psetsockopt || !precvfrom || !psendto || !pclosesocket || !pgethostname || !pgethostbyname || !pgethostbyaddr || !pgetsockname) { Con_SafePrintf ("Couldn't GetProcAddress from winsock.dll\n"); return -1; } if (COM_CheckParm ("-noudp")) return -1; if (winsock_initialized == 0) { wVersionRequested = MAKEWORD(1, 1); r = pWSAStartup (MAKEWORD(1, 1), &winsockdata); if (r) { Con_SafePrintf ("Winsock initialization failed.\n"); return -1; } } winsock_initialized++; // determine my name if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR) { Con_DPrintf ("Winsock TCP/IP Initialization failed.\n"); if (--winsock_initialized == 0) pWSACleanup (); return -1; } // if the quake hostname isn't set, set it to the machine name if (Q_strcmp(hostname.string, "UNNAMED") == 0) { // see if it's a text IP address (well, close enough) for (p = buff; *p; p++) if ((*p < '0' || *p > '9') && *p != '.') break; // if it is a real name, strip off the domain; we only want the host if (*p) { for (i = 0; i < 15; i++) if (buff[i] == '.') break; buff[i] = 0; } Cvar_Set ("hostname", buff); } i = COM_CheckParm ("-ip"); if (i) { if (i < com_argc-1) { myAddr = inet_addr(com_argv[i+1]); if (myAddr == INADDR_NONE) Sys_Error ("%s is not a valid IP address", com_argv[i+1]); strcpy(my_tcpip_address, com_argv[i+1]); } else { Sys_Error ("NET_Init: you must specify an IP address after -ip"); } } else { myAddr = INADDR_ANY; strcpy(my_tcpip_address, "INADDR_ANY"); } if ((net_controlsocket = WINS_OpenSocket (0)) == -1) { Con_Printf("WINS_Init: Unable to open control socket\n"); if (--winsock_initialized == 0) pWSACleanup (); return -1; } ((struct sockaddr_in *)&broadcastaddr)->sin_family = AF_INET; ((struct sockaddr_in *)&broadcastaddr)->sin_addr.s_addr = INADDR_BROADCAST; ((struct sockaddr_in *)&broadcastaddr)->sin_port = htons((unsigned short)net_hostport); Con_Printf("Winsock TCP/IP Initialized\n"); tcpipAvailable = true; return net_controlsocket; } //============================================================================= void WINS_Shutdown (void) { WINS_Listen (false); WINS_CloseSocket (net_controlsocket); if (--winsock_initialized == 0) pWSACleanup (); } //============================================================================= void WINS_Listen (qboolean state) { // enable listening if (state) { if (net_acceptsocket != -1) return; WINS_GetLocalAddress(); if ((net_acceptsocket = WINS_OpenSocket (net_hostport)) == -1) Sys_Error ("WINS_Listen: Unable to open accept socket\n"); return; } // disable listening if (net_acceptsocket == -1) return; WINS_CloseSocket (net_acceptsocket); net_acceptsocket = -1; } //============================================================================= int WINS_OpenSocket (int port) { int newsocket; struct sockaddr_in address; u_long _true = 1; if ((newsocket = psocket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) return -1; if (pioctlsocket (newsocket, FIONBIO, &_true) == -1) goto ErrorReturn; address.sin_family = AF_INET; address.sin_addr.s_addr = myAddr; address.sin_port = htons((unsigned short)port); if( bind (newsocket, (void *)&address, sizeof(address)) == 0) return newsocket; Sys_Error ("Unable to bind to %s", WINS_AddrToString((struct qsockaddr *)&address)); ErrorReturn: pclosesocket (newsocket); return -1; } //============================================================================= int WINS_CloseSocket (int socket) { if (socket == net_broadcastsocket) net_broadcastsocket = 0; return pclosesocket (socket); } //============================================================================= /* ============ PartialIPAddress this lets you type only as much of the net address as required, using the local network components to fill in the rest ============ */ static int PartialIPAddress (char *in, struct qsockaddr *hostaddr) { char buff[256]; char *b; int addr; int num; int mask; int run; int port; buff[0] = '.'; b = buff; strcpy(buff+1, in); if (buff[1] == '.') b++; addr = 0; mask=-1; while (*b == '.') { b++; num = 0; run = 0; while (!( *b < '0' || *b > '9')) { num = num*10 + *b++ - '0'; if (++run > 3) return -1; } if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0) return -1; if (num < 0 || num > 255) return -1; mask<<=8; addr = (addr<<8) + num; } if (*b++ == ':') port = Q_atoi(b); else port = net_hostport; hostaddr->sa_family = AF_INET; ((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port); ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr = (myAddr & htonl(mask)) | htonl(addr); return 0; } //============================================================================= int WINS_Connect (int socket, struct qsockaddr *addr) { return 0; } //============================================================================= int WINS_CheckNewConnections (void) { char buf[4096]; if (net_acceptsocket == -1) return -1; if (precvfrom (net_acceptsocket, buf, sizeof(buf), MSG_PEEK, NULL, NULL) > 0) { return net_acceptsocket; } return -1; } //============================================================================= int WINS_Read (int socket, byte *buf, int len, struct qsockaddr *addr) { int addrlen = sizeof (struct qsockaddr); int ret; ret = precvfrom (socket, buf, len, 0, (struct sockaddr *)addr, &addrlen); if (ret == -1) { int errno = pWSAGetLastError(); if (errno == WSAEWOULDBLOCK || errno == WSAECONNREFUSED) return 0; } return ret; } //============================================================================= int WINS_MakeSocketBroadcastCapable (int socket) { int i = 1; // make this socket broadcast capable if (psetsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i)) < 0) return -1; net_broadcastsocket = socket; return 0; } //============================================================================= int WINS_Broadcast (int socket, byte *buf, int len) { int ret; if (socket != net_broadcastsocket) { if (net_broadcastsocket != 0) Sys_Error("Attempted to use multiple broadcasts sockets\n"); WINS_GetLocalAddress(); ret = WINS_MakeSocketBroadcastCapable (socket); if (ret == -1) { Con_Printf("Unable to make socket broadcast capable\n"); return ret; } } return WINS_Write (socket, buf, len, &broadcastaddr); } //============================================================================= int WINS_Write (int socket, byte *buf, int len, struct qsockaddr *addr) { int ret; ret = psendto (socket, buf, len, 0, (struct sockaddr *)addr, sizeof(struct qsockaddr)); if (ret == -1) if (pWSAGetLastError() == WSAEWOULDBLOCK) return 0; return ret; } //============================================================================= char *WINS_AddrToString (struct qsockaddr *addr) { static char buffer[22]; int haddr; haddr = ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr); sprintf(buffer, "%d.%d.%d.%d:%d", (haddr >> 24) & 0xff, (haddr >> 16) & 0xff, (haddr >> 8) & 0xff, haddr & 0xff, ntohs(((struct sockaddr_in *)addr)->sin_port)); return buffer; } //============================================================================= int WINS_StringToAddr (char *string, struct qsockaddr *addr) { int ha1, ha2, ha3, ha4, hp; int ipaddr; sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp); ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4; addr->sa_family = AF_INET; ((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr); ((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)hp); return 0; } //============================================================================= int WINS_GetSocketAddr (int socket, struct qsockaddr *addr) { int addrlen = sizeof(struct qsockaddr); unsigned int a; Q_memset(addr, 0, sizeof(struct qsockaddr)); pgetsockname(socket, (struct sockaddr *)addr, &addrlen); a = ((struct sockaddr_in *)addr)->sin_addr.s_addr; if (a == 0 || a == inet_addr("127.0.0.1")) ((struct sockaddr_in *)addr)->sin_addr.s_addr = myAddr; return 0; } //============================================================================= int WINS_GetNameFromAddr (struct qsockaddr *addr, char *name) { struct hostent *hostentry; hostentry = pgethostbyaddr ((char *)&((struct sockaddr_in *)addr)->sin_addr, sizeof(struct in_addr), AF_INET); if (hostentry) { Q_strncpy (name, (char *)hostentry->h_name, NET_NAMELEN - 1); return 0; } Q_strcpy (name, WINS_AddrToString (addr)); return 0; } //============================================================================= int WINS_GetAddrFromName(char *name, struct qsockaddr *addr) { struct hostent *hostentry; if (name[0] >= '0' && name[0] <= '9') return PartialIPAddress (name, addr); hostentry = pgethostbyname (name); if (!hostentry) return -1; addr->sa_family = AF_INET; ((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)net_hostport); ((struct sockaddr_in *)addr)->sin_addr.s_addr = *(int *)hostentry->h_addr_list[0]; return 0; } //============================================================================= int WINS_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2) { if (addr1->sa_family != addr2->sa_family) return -1; if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr) return -1; if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port) return 1; return 0; } //============================================================================= int WINS_GetSocketPort (struct qsockaddr *addr) { return ntohs(((struct sockaddr_in *)addr)->sin_port); } int WINS_SetSocketPort (struct qsockaddr *addr, int port) { ((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)port); return 0; } //=============================================================================