int iface_Name(struct iface *iface, const char *name) { struct ifreq ifr; int s; char *newname; if ((newname = strdup(name)) == NULL) { log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno)); return 0; } if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) { log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno)); free(newname); return 0; } strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name)); ifr.ifr_data = newname; if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n", name, newname, strerror(errno)); free(newname); return 0; } free(iface->name); iface->name = newname; return 1; }
int iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del) { struct ncpaddr found; unsigned n; int res, s; if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) { log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno)); return 0; } for (n = res = 0; n < iface->addrs; n++) { ncprange_getaddr(&iface->addr[n].ifa, &found); if (ncpaddr_equal(&found, del)) { if (iface_addr_Zap(iface->name, iface->addr + n, s)) { ncp_IfaceAddrDeleted(ncp, iface->addr + n); bcopy(iface->addr + n + 1, iface->addr + n, (iface->addrs - n - 1) * sizeof *iface->addr); iface->addrs--; res = 1; } break; } } close(s); return res; }
void iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how) { int addrs, af, inskip, in6skip, s4 = -1, s6 = -1, *s; unsigned n; if (iface->addrs) { inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1; addrs = 0; for (n = 0; n < iface->addrs; n++) { af = ncprange_family(&iface->addr[n].ifa); if (family == 0 || family == af) { if (!iface->addr[n].system && (how & IFACE_SYSTEM)) continue; switch (af) { case AF_INET: if (inskip) { inskip = 0; continue; } s = &s4; break; #ifndef NOINET6 case AF_INET6: if (in6skip) { in6skip = 0; continue; } s = &s6; break; #endif default: continue; } if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1) log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno)); else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) { ncp_IfaceAddrDeleted(ncp, iface->addr + n); bcopy(iface->addr + n + 1, iface->addr + n, (iface->addrs - n - 1) * sizeof *iface->addr); iface->addrs--; n--; } } } /* Don't bother realloc()ing - we have little to gain */ if (s4) close(s4); if (s6) close(s6); } }
static int ipv6_available(void) { int s; if ((s = ID0socket(PF_INET6, SOCK_DGRAM, 0)) == -1) return 0; close(s); return 1; }
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; }
static int iface_ChangeFlags(const char *ifname, int flags, int how) { struct ifreq ifrq; int s, new_flags; s = ID0socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) { log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno)); return 0; } memset(&ifrq, '\0', sizeof ifrq); strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1); ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n", strerror(errno)); close(s); return 0; } #ifdef __FreeBSD__ new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16); #else new_flags = ifrq.ifr_flags & 0xffff; #endif if (how == IFACE_ADDFLAGS) new_flags |= flags; else new_flags &= ~flags; ifrq.ifr_flags = new_flags & 0xffff; #ifdef __FreeBSD__ ifrq.ifr_flagshigh = new_flags >> 16; #endif if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n", strerror(errno)); close(s); return 0; } close(s); return 1; /* Success */ }
void iface_Destroy(struct iface *iface) { struct ifreq ifr; int s; if (iface != NULL) { if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) { log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno)); } else { strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name)); if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0) log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n", iface->name, strerror(errno)); } iface_Free(iface); } }
static int iface_ChangeFlags(const char *ifname, int flags, int how) { struct ifreq ifrq; int s; s = ID0socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) { log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno)); return 0; } memset(&ifrq, '\0', sizeof ifrq); strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1); ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0'; if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n", strerror(errno)); close(s); return 0; } if (how == IFACE_ADDFLAGS) ifrq.ifr_flags |= flags; else ifrq.ifr_flags &= ~flags; if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) { log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n", strerror(errno)); close(s); return 0; } close(s); return 1; /* Success */ }
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; }
int iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa, const struct ncpaddr *peer, int how) { int af, removed, s; unsigned n; struct ncpaddr ncplocal; struct iface_addr *addr, newaddr; af = ncprange_family(ifa); if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) { log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno)); return 0; } ncprange_getaddr(ifa, &ncplocal); for (n = 0; n < iface->addrs; n++) { if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) || ncpaddr_equal(&iface->addr[n].peer, peer)) { /* Replace this sockaddr */ if (!(how & IFACE_FORCE_ADD)) { close(s); return 0; /* errno = EEXIST; */ } if (ncprange_equal(&iface->addr[n].ifa, ifa) && ncpaddr_equal(&iface->addr[n].peer, peer)) { close(s); ncp_IfaceAddrAdded(ncp, iface->addr + n); return 1; /* Already there */ } removed = iface_addr_Zap(iface->name, iface->addr + n, s); if (removed) ncp_IfaceAddrDeleted(ncp, iface->addr + n); ncprange_copy(&iface->addr[n].ifa, ifa); ncpaddr_copy(&iface->addr[n].peer, peer); if (!iface_addr_Add(iface->name, iface->addr + n, s)) { if (removed) { bcopy(iface->addr + n + 1, iface->addr + n, (iface->addrs - n - 1) * sizeof *iface->addr); iface->addrs--; n--; } close(s); return 0; } close(s); ncp_IfaceAddrAdded(ncp, iface->addr + n); return 1; } } addr = (struct iface_addr *)realloc (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]); if (addr == NULL) { log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno)); close(s); return 0; } iface->addr = addr; ncprange_copy(&newaddr.ifa, ifa); ncpaddr_copy(&newaddr.peer, peer); newaddr.system = !!(how & IFACE_SYSTEM); if (!iface_addr_Add(iface->name, &newaddr, s)) { close(s); return 0; } if (how & IFACE_ADD_FIRST) { /* Stuff it at the start of our list */ n = 0; bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr); } else n = iface->addrs; iface->addrs++; memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr)); close(s); ncp_IfaceAddrAdded(ncp, iface->addr + n); return 1; }
int iface_Descr(struct cmdargs const *arg) { struct ifreq ifr; struct iface *iface; size_t sz, len; int s, n, ifdescr_maxlen; char *descr; sz = sizeof(int); if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) { log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno)); return 1; } if (ifdescr_maxlen < 1) { log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n"); return 1; } sz = sizeof(char) * ifdescr_maxlen; if ((descr = malloc(sz)) == NULL) { log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno)); return 1; } *descr = '\0'; n = arg->argn; while (n < arg->argc) { if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz) break; if ((len = strlcat(descr, arg->argv[n], sz)) >= sz) break; ++n; } if (len >= sz) { log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n", ifdescr_maxlen-1); free(descr); return 1; } if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) { log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno)); free(descr); return 1; } iface = arg->bundle->iface; strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name)); ifr.ifr_buffer.length = strlen(descr) + 1; ifr.ifr_buffer.buffer = descr; if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) { log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n", descr, strerror(errno)); free(descr); return 1; } free(iface->descr); iface->descr = descr; return 0; }