static int arp_ProxySub(struct bundle *bundle, struct in_addr addr, int add) { int routes; /* * Get the hardware address of an interface on the same subnet as our local * address. */ memset(&arpmsg, 0, sizeof arpmsg); if (!arp_EtherAddr(addr, &arpmsg.hwa, 0)) { log_Printf(LogWARN, "%s: Cannot determine ethernet address for proxy ARP\n", inet_ntoa(addr)); return 0; } routes = ID0socket(PF_ROUTE, SOCK_RAW, AF_INET); if (routes < 0) { log_Printf(LogERROR, "arp_SetProxy: opening routing socket: %s\n", strerror(errno)); return 0; } arpmsg.hdr.rtm_type = add ? RTM_ADD : RTM_DELETE; arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC | RTF_LLDATA; arpmsg.hdr.rtm_version = RTM_VERSION; arpmsg.hdr.rtm_seq = ++bundle->routing_seq; arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY; arpmsg.hdr.rtm_inits = RTV_EXPIRE; arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp); arpmsg.dst.sin_family = AF_INET; arpmsg.dst.sin_addr.s_addr = addr.s_addr; arpmsg.dst.sin_other = SIN_PROXY; arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg + arpmsg.hwa.sdl_len; if (ID0write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0 && !(!add && errno == ESRCH)) { log_Printf(LogERROR, "%s proxy arp entry %s: %s\n", add ? "Add" : "Delete", inet_ntoa(addr), strerror(errno)); close(routes); return 0; } close(routes); return 1; }
void rt_Update(struct bundle *bundle, const struct sockaddr *dst, const struct sockaddr *gw, const struct sockaddr *mask) { struct ncprange ncpdst; struct rtmsg rtmes; char *p; int s, wb; s = ID0socket(PF_ROUTE, SOCK_RAW, 0); if (s < 0) { log_Printf(LogERROR, "rt_Update: socket(): %s\n", strerror(errno)); return; } memset(&rtmes, '\0', sizeof rtmes); rtmes.m_rtm.rtm_version = RTM_VERSION; rtmes.m_rtm.rtm_type = RTM_CHANGE; rtmes.m_rtm.rtm_addrs = 0; rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; rtmes.m_rtm.rtm_pid = getpid(); rtmes.m_rtm.rtm_flags = RTF_UP | RTF_STATIC; if (bundle->ncp.cfg.sendpipe > 0) { rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe; rtmes.m_rtm.rtm_inits |= RTV_SPIPE; } if (bundle->ncp.cfg.recvpipe > 0) { rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe; rtmes.m_rtm.rtm_inits |= RTV_RPIPE; } rtmes.m_rtm.rtm_rmx.rmx_mtu = bundle->iface->mtu; rtmes.m_rtm.rtm_inits |= RTV_MTU; p = rtmes.m_space; if (dst) { rtmes.m_rtm.rtm_addrs |= RTA_DST; p += memcpy_roundup(p, dst, dst->sa_len); } rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; p += memcpy_roundup(p, gw, gw->sa_len); if (mask) { rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; p += memcpy_roundup(p, mask, mask->sa_len); } rtmes.m_rtm.rtm_msglen = p - (char *)&rtmes; wb = ID0write(s, &rtmes, rtmes.m_rtm.rtm_msglen); if (wb < 0) { ncprange_setsa(&ncpdst, dst, mask); log_Printf(LogTCPIP, "rt_Update failure:\n"); log_Printf(LogTCPIP, "rt_Update: Dst = %s\n", ncprange_ntoa(&ncpdst)); if (rtmes.m_rtm.rtm_errno == 0) log_Printf(LogWARN, "%s: Change route failed: errno: %s\n", ncprange_ntoa(&ncpdst), strerror(errno)); else log_Printf(LogWARN, "%s: Change route failed: %s\n", ncprange_ntoa(&ncpdst), strerror(rtmes.m_rtm.rtm_errno)); } close(s); }
int rt_Set(struct bundle *bundle, int cmd, const struct ncprange *dst, const struct ncpaddr *gw, int bang, int quiet) { struct rtmsg rtmes; int s, nb, wb; char *cp; const char *cmdstr; struct sockaddr_storage sadst, samask, sagw; int result = 1; if (bang) cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); else cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); s = ID0socket(PF_ROUTE, SOCK_RAW, 0); if (s < 0) { log_Printf(LogERROR, "rt_Set: socket(): %s\n", strerror(errno)); return result; } memset(&rtmes, '\0', sizeof rtmes); rtmes.m_rtm.rtm_version = RTM_VERSION; rtmes.m_rtm.rtm_type = cmd; rtmes.m_rtm.rtm_addrs = RTA_DST; rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; rtmes.m_rtm.rtm_pid = getpid(); rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; if (cmd == RTM_ADD) { if (bundle->ncp.cfg.sendpipe > 0) { rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe; rtmes.m_rtm.rtm_inits |= RTV_SPIPE; } if (bundle->ncp.cfg.recvpipe > 0) { rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe; rtmes.m_rtm.rtm_inits |= RTV_RPIPE; } } ncprange_getsa(dst, &sadst, &samask); #if defined(__KAME__) && !defined(NOINET6) add_scope((struct sockaddr *)&sadst, bundle->iface->index); #endif cp = rtmes.m_space; cp += memcpy_roundup(cp, &sadst, sadst.ss_len); if (cmd == RTM_ADD) { if (gw == NULL) { log_Printf(LogERROR, "rt_Set: Program error\n"); close(s); return result; } ncpaddr_getsa(gw, &sagw); #if defined(__KAME__) && !defined(NOINET6) add_scope((struct sockaddr *)&sagw, bundle->iface->index); #endif if (ncpaddr_isdefault(gw)) { if (!quiet) log_Printf(LogERROR, "rt_Set: Cannot add a route with" " gateway 0.0.0.0\n"); close(s); return result; } else { cp += memcpy_roundup(cp, &sagw, sagw.ss_len); rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; } } if (!ncprange_ishost(dst)) { cp += memcpy_roundup(cp, &samask, samask.ss_len); rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; } nb = cp - (char *)&rtmes; rtmes.m_rtm.rtm_msglen = nb; wb = ID0write(s, &rtmes, nb); if (wb < 0) { log_Printf(LogTCPIP, "rt_Set failure:\n"); log_Printf(LogTCPIP, "rt_Set: Cmd = %s\n", cmdstr); log_Printf(LogTCPIP, "rt_Set: Dst = %s\n", ncprange_ntoa(dst)); if (gw != NULL) log_Printf(LogTCPIP, "rt_Set: Gateway = %s\n", ncpaddr_ntoa(gw)); failed: if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { if (!bang) { log_Printf(LogWARN, "Add route failed: %s already exists\n", ncprange_ntoa(dst)); result = 0; /* Don't add to our dynamic list */ } else { rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; if ((wb = ID0write(s, &rtmes, nb)) < 0) goto failed; } } else if (cmd == RTM_DELETE && (rtmes.m_rtm.rtm_errno == ESRCH || (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { if (!bang) log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", ncprange_ntoa(dst)); } else if (rtmes.m_rtm.rtm_errno == 0) { if (!quiet || errno != ENETUNREACH) log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, ncprange_ntoa(dst), strerror(errno)); } else log_Printf(LogWARN, "%s route failed: %s: %s\n", cmdstr, ncprange_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); } if (log_IsKept(LogDEBUG)) { char gwstr[40]; if (gw) snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(gw)); else snprintf(gwstr, sizeof gwstr, "<none>"); log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %s, gateway = %s\n", wb, cmdstr, ncprange_ntoa(dst), gwstr); } close(s); return result; }