/* net_udp6.c (description) Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 1999,2000 Nelson Rush. Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se] Copyright (C) 1999,2000 contributors of the QuakeForge project Please see the file "AUTHORS" for a list of contributors 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: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #include #include #include /* Sun's model_t in sys/model.h conflicts w/ Quake's model_t */ #define model_t quakeforgemodel_t #include #include #ifdef HAVE_SYS_IOCTL_H # include #endif #ifdef HAVE_SYS_SOCKET_H # include #endif #ifdef HAVE_NETINET_IN_H # include #endif #ifdef HAVE_NETDB_H # include #endif #ifdef HAVE_ARPA_INET_H # include #endif #ifdef HAVE_SYS_FILIO_H # include #endif #undef model_t #ifdef _WIN32 # include # undef EWOULDBLOCK # define EWOULDBLOCK WSAEWOULDBLOCK #endif #ifdef NeXT #include #endif #ifndef MAXHOSTNAMELEN #define MAXHOSTNAMELEN 512 #endif netadr_t net_local_adr; netadr_t net_from; sizebuf_t net_message; int net_socket; #define MAX_UDP_PACKET (MAX_MSGLEN*2) byte net_message_buffer[MAX_UDP_PACKET]; #ifdef _WIN32 WSADATA winsockdata; #endif //============================================================================= void NetadrToSockadr (netadr_t *a, struct sockaddr_in6 *s) { memset (s, 0, sizeof(*s)); s->sin6_family = AF_INET6; s->sin6_addr.in6_u.u6_addr32[0] = a->ip[0]; s->sin6_addr.in6_u.u6_addr32[1] = a->ip[1]; s->sin6_addr.in6_u.u6_addr32[2] = a->ip[2]; s->sin6_addr.in6_u.u6_addr32[3] = a->ip[3]; s->sin6_port = a->port; } void SockadrToNetadr (struct sockaddr_in6 *s, netadr_t *a) { a->ip[0] = s->sin6_addr.in6_u.u6_addr32[0]; a->ip[1] = s->sin6_addr.in6_u.u6_addr32[1]; a->ip[2] = s->sin6_addr.in6_u.u6_addr32[2]; a->ip[3] = s->sin6_addr.in6_u.u6_addr32[3]; a->port = s->sin6_port; } qboolean NET_CompareBaseAdr (netadr_t a, netadr_t b) { if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3]) return true; return false; } qboolean NET_CompareAdr (netadr_t a, netadr_t b) { if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3] && a.port == b.port) return true; return false; } char *NET_AdrToString (netadr_t a) { static char s[64]; char *base; base=NET_BaseAdrToString(a); sprintf(s,"[%s]:%d",base,ntohs(a.port)); return s; } char *NET_BaseAdrToString (netadr_t a) { static char s[64]; struct sockaddr_in6 sa; int err; NetadrToSockadr(&a,&sa); if ((err=getnameinfo((struct sockaddr *) &sa,sizeof(sa),s,sizeof(s),NULL,0,NI_NUMERICHOST))) { strcpy(s,""); } return s; } /* ============= NET_StringToAdr idnewt idnewt:28000 192.246.40.70 192.246.40.70:28000 ============= */ qboolean NET_StringToAdr (char *s, netadr_t *a) { struct addrinfo hints; struct addrinfo *resultp; char *space; char *ports=NULL; char copy[128]; char *addrs; int err; struct sockaddr_storage ss; struct sockaddr_in6 *ss6; struct sockaddr_in *ss4; memset(&hints,0,sizeof(hints)); hints.ai_socktype=SOCK_DGRAM; hints.ai_family=PF_UNSPEC; strcpy(copy,s); addrs=space=copy; if (*addrs=='[') { addrs++; for (; *space && *space!=']'; space++); if (!*space) { Con_Printf ("NET_StringToAdr: invalid IPv6 address %s\n",s); return 0; } *space++='\0'; } for (; *space; space++) { if (*space==':') { *space='\0'; ports=space+1; } } // Con_Printf ("NET_StringToAdr: addrs %s ports %s\n",addrs, ports); if ((err=getaddrinfo(addrs,ports,&hints,&resultp))) { // Error Con_Printf ("NET_StringToAdr: string %s:\n%s\n",s, gai_strerror(err)); return 0; } switch (resultp->ai_family) { case AF_INET: // convert to ipv6 addr memset(&ss,0,sizeof(ss)); ss6=(struct sockaddr_in6 *) &ss; ss4=(struct sockaddr_in *) resultp->ai_addr; ss6->sin6_family=AF_INET6; ss6->sin6_addr.in6_u.u6_addr32[0]=0; ss6->sin6_addr.in6_u.u6_addr32[1]=0; ss6->sin6_addr.in6_u.u6_addr32[2]=htonl(0xffff); ss6->sin6_addr.in6_u.u6_addr32[3]=ss4->sin_addr.s_addr; ss6->sin6_port=ss4->sin_port; break; case AF_INET6: memcpy(&ss,resultp->ai_addr,sizeof(struct sockaddr_in6)); break; default: Con_Printf ("NET_StringToAdr: string %s:\nprotocol family %d not supported\n",s, resultp->ai_family); return 0; } SockadrToNetadr ((struct sockaddr_in6 *) &ss, a); return true; } // Returns true if we can't bind the address locally--in other words, // the IP is NOT one of our interfaces. qboolean NET_IsClientLegal(netadr_t *adr) { #if 0 struct sockaddr_in sadr; int newsocket; if (adr->ip[0] == 127) return false; // no local connections period NetadrToSockadr (adr, &sadr); if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) Sys_Error ("NET_IsClientLegal: socket: %s", strerror(errno)); sadr.sin_port = 0; if( bind (newsocket, (void *)&sadr, sizeof(sadr)) == -1) { // It is not a local address close(newsocket); return true; } close(newsocket); return false; #else return true; #endif } //============================================================================= qboolean NET_GetPacket (void) { int ret; struct sockaddr_in6 from; unsigned int fromlen; fromlen = sizeof(from); ret = recvfrom(net_socket, (void*)net_message_buffer, sizeof(net_message_buffer), 0, (struct sockaddr *)&from, &fromlen); SockadrToNetadr (&from, &net_from); if (ret == -1) { #ifdef _WIN32 int err = WSAGetLastError(); if (err == WSAEMSGSIZE) { Con_Printf ("Warning: Oversize packet from %s\n", NET_AdrToString (net_from)); return false; } #else /* _WIN32 */ int err = errno; if (err == ECONNREFUSED) return false; #endif /* _WIN32 */ if (err == EWOULDBLOCK) return false; Sys_Printf ("NET_GetPacket: %s\n", strerror(err)); return false; } net_message.cursize = ret; if (ret == sizeof(net_message_buffer)) { Con_Printf ("Oversize packet from %s\n", NET_AdrToString (net_from)); return false; } return ret; } //============================================================================= void NET_SendPacket (int length, void *data, netadr_t to) { int ret; struct sockaddr_in6 addr; NetadrToSockadr (&to, &addr); ret = sendto (net_socket, data, length, 0, (struct sockaddr *)&addr, sizeof(addr) ); if (ret == -1) { #ifdef _WIN32 int err = WSAGetLastError(); #ifndef SERVERONLY if (err == WSAEADDRNOTAVAIL) Con_DPrintf("NET_SendPacket Warning: %i\n", err); #endif #else /* _WIN32 */ int err = errno; if (err == ECONNREFUSED) return; #endif /* _WIN32 */ if (err == EWOULDBLOCK) return; Sys_Printf ("NET_SendPacket: %s\n", strerror(err)); } } //============================================================================= int UDP_OpenSocket (int port) { int err; int newsocket; struct sockaddr_in6 address; struct sockaddr_in *ss4; struct addrinfo hints; struct addrinfo *resultp; char addrbuf[128]; #ifdef _WIN32 #define ioctl ioctlsocket unsigned long _true = true; #else int _true = 1; #endif int i; if ((newsocket = socket (PF_INET6, SOCK_DGRAM, IPPROTO_UDP)) == -1) Sys_Error ("UDP_OpenSocket: socket: %s", strerror(errno)); if (ioctl (newsocket, FIONBIO, &_true) == -1) Sys_Error ("UDP_OpenSocket: ioctl FIONBIO: %s", strerror(errno)); memset(&address,0,sizeof(address)); address.sin6_family = AF_INET6; //ZOID -- check for interface binding option if ((i = COM_CheckParm("-ip")) != 0 && i < com_argc) { memset(&hints,0,sizeof(hints)); hints.ai_socktype=SOCK_DGRAM; hints.ai_family=PF_UNSPEC; if ((err=getaddrinfo(com_argv[i+1],NULL,&hints,&resultp))) { Sys_Error ("UDP_OpenSocket: addr %s: %s",com_argv[i+1], gai_strerror(err)); } switch(resultp->ai_family) { case AF_INET: ss4=(struct sockaddr_in *) resultp->ai_addr; address.sin6_family=AF_INET6; address.sin6_addr.in6_u.u6_addr32[0]=0; address.sin6_addr.in6_u.u6_addr32[1]=0; address.sin6_addr.in6_u.u6_addr32[2]=htonl(0xffff); address.sin6_addr.in6_u.u6_addr32[3]=ss4->sin_addr.s_addr; break; case AF_INET6: memcpy((void *) &address,(void *) resultp->ai_addr,sizeof(address)); break; default: Sys_Error ("UDP_OpenSocket: address family %d not supported",com_argv[i+1], resultp->ai_family); } // address.sin_addr.s_addr = inet_addr(com_argv[i+1]); Con_Printf("Binding to IP Interface Address of %s\n", inet_ntop(AF_INET6,&address.sin6_addr,addrbuf,sizeof(addrbuf))); } else address.sin6_addr = in6addr_any; if (port == PORT_ANY) address.sin6_port = 0; else address.sin6_port = htons((unsigned short)port); if( bind (newsocket, (void *)&address, sizeof(address)) == -1) Sys_Error ("UDP_OpenSocket: bind: %s", strerror(errno)); return newsocket; } void NET_GetLocalAddress (void) { char buff[MAXHOSTNAMELEN]; struct sockaddr_in6 address; unsigned int namelen; if (gethostname(buff, MAXHOSTNAMELEN) == -1) Sys_Error ("Net_GetLocalAddress: gethostname: %s", strerror(errno)); buff[MAXHOSTNAMELEN-1] = 0; NET_StringToAdr (buff, &net_local_adr); namelen = sizeof(address); if (getsockname (net_socket, (struct sockaddr *)&address, &namelen) == -1) Sys_Error ("NET_GetLocalAddress: getsockname: %s", strerror(errno)); net_local_adr.port = address.sin6_port; Con_Printf("IP address %s\n", NET_AdrToString (net_local_adr) ); } /* ==================== NET_Init ==================== */ void NET_Init (int port) { #ifdef _WIN32 WORD wVersionRequested; int r; wVersionRequested = MAKEWORD(1, 1); r = WSAStartup(MAKEWORD(1, 1), &winsockdata); if (r) Sys_Error ("Winsock initialization failed."); #endif /* _WIN32 */ // // open the single socket to be used for all communications // net_socket = UDP_OpenSocket (port); // // init the message buffer // net_message.maxsize = sizeof(net_message_buffer); net_message.data = net_message_buffer; // // determine my name & address // NET_GetLocalAddress (); Con_Printf("UDP Initialized\n"); } /* ==================== NET_Shutdown ==================== */ void NET_Shutdown (void) { #ifdef _WIN32 closesocket(net_socket); WSACleanup(); #else close(net_socket); #endif }