/* net_udp6.c (description) Copyright (C) 1996-1997 Id Software, Inc. 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 */ static const char rcsid[] = "$Id$"; /* Sun's model_t in sys/model.h conflicts w/ Quake's model_t */ #define model_t quakeforgemodel_t #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #ifdef HAVE_UNISTD_H # include #endif #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 #ifdef NeXT # include #endif #ifdef _WIN32 # include # undef EWOULDBLOCK # define EWOULDBLOCK WSAEWOULDBLOCK # ifdef HAVE_IPV6 # include # define _DEF_BYTE_ # undef IP_MULTICAST_IF # undef IP_MULTICAST_TTL # undef IP_MULTICAST_LOOP # undef IP_ADD_MEMBERSHIP # undef IP_DROP_MEMBERSHIP # define ip_mreq ip_mreq_icky_hack # include # undef ip_mreq # ifndef WINSOCK_API_LINKAGE # define WINSOCK_API_LINKAGE # endif # ifndef _WINSOCK2API_ # define _WINSOCK2API_ # endif # include # define _WINSOCKAPI_ # define HAVE_SOCKLEN_T # endif #endif #include #include #include #undef model_t #include "QF/console.h" #include "QF/msg.h" #include "QF/qargs.h" #include "QF/qtypes.h" #include "QF/sys.h" #include "net.h" #ifndef MAXHOSTNAMELEN # define MAXHOSTNAMELEN 512 #endif #ifdef __GLIBC__ // glibc macro # define s6_addr32 in6_u.u6_addr32 # if ! __GLIBC_PREREQ (2,2) # define ss_family __ss_family # endif #endif netadr_t net_from; netadr_t net_local_adr; int net_socket; static sizebuf_t _net_message_message; static msg_t _net_message = {0, 0, &_net_message_message}; msg_t *net_message = &_net_message; #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; memcpy (&s->sin6_addr, a->ip, sizeof (s->sin6_addr)); s->sin6_port = a->port; #ifdef HAVE_SIN6_LEN s->sin6_len = sizeof (struct sockaddr_in6); #endif } void SockadrToNetadr (struct sockaddr_in6 *s, netadr_t *a) { memcpy (a->ip, &s->sin6_addr, sizeof (s->sin6_addr)); a->port = s->sin6_port; a->family = s->sin6_family; } qboolean NET_AdrIsLoopback (netadr_t a) { if (IN6_IS_ADDR_LOOPBACK ((struct in6_addr *) &a.ip)) return true; else if (IN6_IS_ADDR_V4MAPPED ((struct in6_addr *) &a.ip) && ((struct in_addr *) &a.ip[3])->s_addr == htonl (INADDR_LOOPBACK)) return true; return false; } qboolean NET_CompareBaseAdr (netadr_t a, netadr_t b) { if (memcmp (a.ip, b.ip, sizeof (a.ip)) == 0) return true; return false; } qboolean NET_CompareAdr (netadr_t a, netadr_t b) { if (memcmp (a.ip, b.ip, sizeof (a.ip)) == 0 && a.port == b.port) return true; return false; } const char * NET_AdrToString (netadr_t a) { static char s[64]; const char *base; base = NET_BaseAdrToString (a); sprintf (s, "[%s]:%d", base, ntohs (a.port)); return s; } const char * NET_BaseAdrToString (netadr_t a) { static char s[64]; struct sockaddr_storage ss; // NetadrToSockadr(&a,&sa); memset (&ss, 0, sizeof (ss)); if (IN6_IS_ADDR_V4MAPPED ((struct in6_addr *) a.ip)) { #ifdef HAVE_SS_LEN ss.ss_len = sizeof (struct sockaddr_in); #endif ss.ss_family = AF_INET; memcpy (&((struct sockaddr_in *) &ss)->sin_addr, &((struct in6_addr *) a.ip)->s6_addr[12], sizeof (struct in_addr)); } else { #ifdef HAVE_SS_LEN ss.ss_len = sizeof (struct sockaddr_in6); #endif ss.ss_family = AF_INET6; memcpy (&((struct sockaddr_in6 *) &ss)->sin6_addr, a.ip, sizeof (struct in6_addr)); } #ifdef HAVE_SS_LEN if (getnameinfo ((struct sockaddr *) &ss, ss.ss_len, s, sizeof (s), NULL, 0, NI_NUMERICHOST)) strcpy (s, ""); #else // maybe needs switch for AF_INET6 or AF_INET? if (getnameinfo ((struct sockaddr *) &ss, sizeof (ss), s, sizeof (s), NULL, 0, NI_NUMERICHOST)) strcpy (s, ""); #endif return s; } /* NET_StringToAdr idnewt idnewt:28000 192.246.40.70 192.246.40.70:28000 */ qboolean NET_StringToAdr (const char *s, netadr_t *a) { char copy[128]; char *addrs, *space; char *ports = NULL; int err; struct addrinfo hints; struct addrinfo *resultp; 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; memset (&ss6->sin6_addr, 0, sizeof (ss6->sin6_addr)); ss6->sin6_addr.s6_addr[10] = ss6->sin6_addr.s6_addr[11] = 0xff; memcpy (&ss6->sin6_addr.s6_addr[12], &ss4->sin_addr, sizeof (ss4->sin_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 int newsocket; struct sockaddr_in sadr; 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; unsigned int fromlen; struct sockaddr_in6 from; 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; Con_Printf ("NET_GetPacket: %s\n", strerror (err)); return false; } _net_message_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; Con_Printf ("NET_SendPacket: %s\n", strerror (err)); } } int UDP_OpenSocket (int port) { char Buf[BUFSIZ], *Host, *Service; int newsocket, Error; struct sockaddr_in6 address; struct addrinfo hints, *res; #ifdef IPV6_BINDV6ONLY int dummy; #endif #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 memset (&hints, 0, sizeof (hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; hints.ai_protocol = IPPROTO_UDP; hints.ai_flags = AI_PASSIVE; if ((i = COM_CheckParm ("-ip")) != 0 && i < com_argc) { Host = com_argv[i + 1]; } else { Host = "0::0"; } Con_Printf ("Binding to IP Interface Address of %s\n", Host); if (port == PORT_ANY) Service = NULL; else { sprintf (Buf, "%5d", port); Service = Buf; } if ((Error = getaddrinfo (Host, Service, &hints, &res))) Sys_Error ("UDP_OpenSocket: getaddrinfo: %s", gai_strerror (Error)); if ( (newsocket = socket (res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) Sys_Error ("UDP_OpenSocket: socket: %s", strerror (errno)); // FIONBIO sets non-blocking IO for this socket #ifdef _WIN32 if (ioctl (newsocket, FIONBIO, &_true) == -1) #else /* _WIN32 */ if (ioctl (newsocket, FIONBIO, (char *) &_true) == -1) #endif /* _WIN32 */ Sys_Error ("UDP_OpenSocket: ioctl FIONBIO: %s", strerror (errno)); #ifdef IPV6_BINDV6ONLY if (setsockopt (newsocket, IPPROTO_IPV6, IPV6_BINDV6ONLY, &dummy, sizeof (dummy)) < 0) { /* I don't care */ } #endif if (bind (newsocket, res->ai_addr, res->ai_addrlen) < 0) Sys_Error ("UDP_OpenSocket: bind: %s", strerror (errno)); freeaddrinfo (res); return newsocket; } void NET_GetLocalAddress (void) { char buff[MAXHOSTNAMELEN]; unsigned int namelen; struct sockaddr_in6 address; 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)); } void NET_Init (int port) { #ifdef _WIN32 int r; WORD wVersionRequested; 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_message.maxsize = sizeof (net_message_buffer); _net_message_message.data = net_message_buffer; // determine my name & address NET_GetLocalAddress (); Con_Printf ("UDP Initialized\n"); } void NET_Shutdown (void) { #ifdef _WIN32 closesocket (net_socket); WSACleanup (); #else close (net_socket); #endif }