/*- * Copyright (c) 1998 Brian Somers * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #include #include #include #include #include #ifdef __FreeBSD__ #include #endif #include #include #include #include #include #ifndef NOINET6 #include #endif #include #include #include #include #include #include #include #include #include #include "layer.h" #include "defs.h" #include "command.h" #include "mbuf.h" #include "log.h" #include "id.h" #include "timer.h" #include "fsm.h" #include "iplist.h" #include "lqr.h" #include "hdlc.h" #include "throughput.h" #include "slcompress.h" #include "descriptor.h" #include "ncpaddr.h" #include "ip.h" #include "ipcp.h" #include "filter.h" #include "lcp.h" #include "ccp.h" #include "link.h" #include "mp.h" #ifndef NORADIUS #include "radius.h" #endif #include "ipv6cp.h" #include "ncp.h" #include "bundle.h" #include "prompt.h" #include "iface.h" struct iface * iface_Create(const char *name) { int mib[6], maxtries, err; size_t needed, namelen; char *buf, *ptr, *end; struct if_msghdr *ifm; struct ifa_msghdr *ifam; struct sockaddr_dl *dl; struct sockaddr *sa[RTAX_MAX]; struct iface *iface; struct iface_addr *addr; mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; mib[3] = 0; mib[4] = NET_RT_IFLIST; mib[5] = 0; maxtries = 20; err = 0; do { if (maxtries-- == 0 || (err && err != ENOMEM)) { fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err)); return NULL; } if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { fprintf(stderr, "iface_Create: sysctl: estimate: %s\n", strerror(errno)); return NULL; } if ((buf = (char *)malloc(needed)) == NULL) { fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno)); return NULL; } if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { err = errno; free(buf); buf = NULL; } } while (buf == NULL); ptr = buf; end = buf + needed; iface = NULL; namelen = strlen(name); while (ptr < end && iface == NULL) { ifm = (struct if_msghdr *)ptr; /* On if_msghdr */ if (ifm->ifm_type != RTM_IFINFO) break; dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */ if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) { iface = (struct iface *)malloc(sizeof *iface); if (iface == NULL) { fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno)); return NULL; } iface->name = strdup(name); iface->index = ifm->ifm_index; iface->flags = ifm->ifm_flags; iface->mtu = 0; iface->addrs = 0; iface->addr = NULL; } ptr += ifm->ifm_msglen; /* First ifa_msghdr */ for (; ptr < end; ptr += ifam->ifam_msglen) { ifam = (struct ifa_msghdr *)ptr; /* Next if address */ if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */ break; if (iface != NULL && ifam->ifam_addrs & RTA_IFA) { /* Found a configured interface ! */ iface_ParseHdr(ifam, sa); if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET #ifndef NOINET6 || sa[RTAX_IFA]->sa_family == AF_INET6 #endif )) { /* Record the address */ addr = (struct iface_addr *) realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]); if (addr == NULL) break; iface->addr = addr; addr += iface->addrs; iface->addrs++; ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]); if (sa[RTAX_BRD]) ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]); else ncpaddr_init(&addr->peer); } } } } free(buf); return iface; } static int iface_addr_Zap(const char *name, struct iface_addr *addr, int s) { struct ifaliasreq ifra; #ifndef NOINET6 struct in6_aliasreq ifra6; #endif struct sockaddr_in *me4, *msk4, *peer4; struct sockaddr_storage ssme, sspeer, ssmsk; int res; ncprange_getsa(&addr->ifa, &ssme, &ssmsk); ncpaddr_getsa(&addr->peer, &sspeer); res = 0; switch (ncprange_family(&addr->ifa)) { case AF_INET: memset(&ifra, '\0', sizeof ifra); strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1); me4 = (struct sockaddr_in *)&ifra.ifra_addr; memcpy(me4, &ssme, sizeof *me4); msk4 = (struct sockaddr_in *)&ifra.ifra_mask; memcpy(msk4, &ssmsk, sizeof *msk4); peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr; if (ncpaddr_family(&addr->peer) == AF_UNSPEC) { peer4->sin_family = AF_INET; peer4->sin_len = sizeof(*peer4); peer4->sin_addr.s_addr = INADDR_NONE; } else memcpy(peer4, &sspeer, sizeof *peer4); res = ID0ioctl(s, SIOCDIFADDR, &ifra); if (log_IsKept(LogDEBUG)) { char buf[100]; snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa)); log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n", ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res); } break; #ifndef NOINET6 case AF_INET6: memset(&ifra6, '\0', sizeof ifra6); strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1); memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr); memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask); ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC; if (ncpaddr_family(&addr->peer) == AF_UNSPEC) ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC; else memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr); ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6); break; #endif } if (res == -1) { char dst[40]; const char *end = #ifndef NOINET6 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" : #endif ""; if (ncpaddr_family(&addr->peer) == AF_UNSPEC) log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n", end, ncprange_ntoa(&addr->ifa), strerror(errno)); else { snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer)); log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n", end, ncprange_ntoa(&addr->ifa), dst, strerror(errno)); } } return res != -1; } static int iface_addr_Add(const char *name, struct iface_addr *addr, int s) { struct ifaliasreq ifra; #ifndef NOINET6 struct in6_aliasreq ifra6; #endif struct sockaddr_in *me4, *msk4, *peer4; struct sockaddr_storage ssme, sspeer, ssmsk; int res; ncprange_getsa(&addr->ifa, &ssme, &ssmsk); ncpaddr_getsa(&addr->peer, &sspeer); res = 0; switch (ncprange_family(&addr->ifa)) { case AF_INET: memset(&ifra, '\0', sizeof ifra); strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1); me4 = (struct sockaddr_in *)&ifra.ifra_addr; memcpy(me4, &ssme, sizeof *me4); msk4 = (struct sockaddr_in *)&ifra.ifra_mask; memcpy(msk4, &ssmsk, sizeof *msk4); peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr; if (ncpaddr_family(&addr->peer) == AF_UNSPEC) { peer4->sin_family = AF_INET; peer4->sin_len = sizeof(*peer4); peer4->sin_addr.s_addr = INADDR_NONE; } else memcpy(peer4, &sspeer, sizeof *peer4); res = ID0ioctl(s, SIOCAIFADDR, &ifra); if (log_IsKept(LogDEBUG)) { char buf[100]; snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa)); log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n", ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res); } break; #ifndef NOINET6 case AF_INET6: memset(&ifra6, '\0', sizeof ifra6); strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1); memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr); memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask); if (ncpaddr_family(&addr->peer) == AF_UNSPEC) ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC; else memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr); ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6); break; #endif } if (res == -1) { char dst[40]; const char *end = #ifndef NOINET6 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" : #endif ""; if (ncpaddr_family(&addr->peer) == AF_UNSPEC) log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n", end, ncprange_ntoa(&addr->ifa), strerror(errno)); else { snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer)); log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n", end, ncprange_ntoa(&addr->ifa), dst, strerror(errno)); } } return res != -1; } void iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how) { int addrs, af, inskip, in6skip, n, s4 = -1, s6 = -1, *s; 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); } } int iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa, const struct ncpaddr *peer, int how) { int af, n, removed, s, width; 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); return 1; /* Already there */ } width = #ifndef NOINET6 (af == AF_INET6) ? 128 : #endif 32; 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_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del) { struct ncpaddr found; int n, 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; } #define IFACE_ADDFLAGS 1 #define IFACE_DELFLAGS 2 static int iface_ChangeFlags(const char *ifname, int flags, int how) { struct ifreq ifrq; int s; s = ID0socket(AF_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 */ } int iface_SetFlags(const char *ifname, int flags) { return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS); } int iface_ClearFlags(const char *ifname, int flags) { return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS); } void iface_Destroy(struct iface *iface) { /* * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually * if that's what the user wants. It's better to leave the interface * allocated so that existing connections can continue to work. */ if (iface != NULL) { free(iface->name); free(iface->addr); free(iface); } } #define if_entry(x) { IFF_##x, #x } struct { int flag; const char *value; } if_flags[] = { if_entry(UP), if_entry(BROADCAST), if_entry(DEBUG), if_entry(LOOPBACK), if_entry(POINTOPOINT), if_entry(RUNNING), if_entry(NOARP), if_entry(PROMISC), if_entry(ALLMULTI), if_entry(OACTIVE), if_entry(SIMPLEX), if_entry(LINK0), if_entry(LINK1), if_entry(LINK2), if_entry(MULTICAST), { 0, "???" } }; int iface_Show(struct cmdargs const *arg) { struct ncpaddr ncpaddr; struct iface *iface = arg->bundle->iface, *current; int f, flags; #ifndef NOINET6 int scopeid, width; #endif struct in_addr mask; current = iface_Create(iface->name); flags = iface->flags = current->flags; iface_Destroy(current); prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index); for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++) if ((if_flags[f].flag & flags)) { prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",", if_flags[f].value); flags &= ~if_flags[f].flag; } #if 0 if (flags) prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",", flags); #endif prompt_Printf(arg->prompt, "> mtu %d has %d address%s:\n", iface->mtu, iface->addrs, iface->addrs == 1 ? "" : "es"); for (f = 0; f < iface->addrs; f++) { ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr); switch (ncprange_family(&iface->addr[f].ifa)) { case AF_INET: prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr)); if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC) prompt_Printf(arg->prompt, "255.255.255.255"); else prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer)); ncprange_getip4mask(&iface->addr[f].ifa, &mask); prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr)); break; #ifndef NOINET6 case AF_INET6: prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr)); if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC) prompt_Printf(arg->prompt, " --> %s", ncpaddr_ntoa(&iface->addr[f].peer)); ncprange_getwidth(&iface->addr[f].ifa, &width); if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC) prompt_Printf(arg->prompt, " prefixlen %d", width); if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1) prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid); break; #endif } prompt_Printf(arg->prompt, "\n"); } return 0; } void iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX]) { char *wp; int rtax; wp = (char *)(ifam + 1); for (rtax = 0; rtax < RTAX_MAX; rtax++) if (ifam->ifam_addrs & (1 << rtax)) { sa[rtax] = (struct sockaddr *)wp; wp += ROUNDUP(sa[rtax]->sa_len); } else sa[rtax] = NULL; }