Index: stable/11/usr.sbin/rtadvd/if.c =================================================================== --- stable/11/usr.sbin/rtadvd/if.c (revision 311288) +++ stable/11/usr.sbin/rtadvd/if.c (revision 311289) @@ -1,752 +1,751 @@ /* $FreeBSD$ */ /* $KAME: if.c,v 1.17 2001/01/21 15:27:30 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * Copyright (C) 2011 Hiroki Sato * 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. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pathnames.h" #include "rtadvd.h" #include "if.h" #define ROUNDUP(a, size) \ (((a) & ((size)-1)) ? (1 + ((a) | ((size)-1))) : (a)) #define NEXT_SA(ap) \ (ap) = (struct sockaddr *)((caddr_t)(ap) + \ ((ap)->sa_len ? ROUNDUP((ap)->sa_len, sizeof(u_long)) : \ sizeof(u_long))) struct sockaddr_in6 sin6_linklocal_allnodes = { .sin6_len = sizeof(sin6_linklocal_allnodes), .sin6_family = AF_INET6, .sin6_addr = IN6ADDR_LINKLOCAL_ALLNODES_INIT, }; struct sockaddr_in6 sin6_linklocal_allrouters = { .sin6_len = sizeof(sin6_linklocal_allrouters), .sin6_family = AF_INET6, .sin6_addr = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT, }; struct sockaddr_in6 sin6_sitelocal_allrouters = { .sin6_len = sizeof(sin6_sitelocal_allrouters), .sin6_family = AF_INET6, .sin6_addr = IN6ADDR_SITELOCAL_ALLROUTERS_INIT, }; struct sockinfo sock = { .si_fd = -1, .si_name = NULL }; struct sockinfo rtsock = { .si_fd = -1, .si_name = NULL }; struct sockinfo ctrlsock = { .si_fd = -1, .si_name = _PATH_CTRL_SOCK }; char *mcastif; static void get_rtaddrs(int, struct sockaddr *, struct sockaddr **); static struct if_msghdr *get_next_msghdr(struct if_msghdr *, struct if_msghdr *); static void get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) { int i; for (i = 0; i < RTAX_MAX; i++) { if (addrs & (1 << i)) { rti_info[i] = sa; NEXT_SA(sa); } else rti_info[i] = NULL; } } #define ROUNDUP8(a) (1 + (((a) - 1) | 7)) int lladdropt_length(struct sockaddr_dl *sdl) { switch (sdl->sdl_type) { case IFT_ETHER: case IFT_L2VLAN: case IFT_BRIDGE: return (ROUNDUP8(ETHER_ADDR_LEN + 2)); default: return (0); } } void lladdropt_fill(struct sockaddr_dl *sdl, struct nd_opt_hdr *ndopt) { char *addr; ndopt->nd_opt_type = ND_OPT_SOURCE_LINKADDR; /* fixed */ switch (sdl->sdl_type) { case IFT_ETHER: case IFT_L2VLAN: case IFT_BRIDGE: ndopt->nd_opt_len = (ROUNDUP8(ETHER_ADDR_LEN + 2)) >> 3; addr = (char *)(ndopt + 1); memcpy(addr, LLADDR(sdl), ETHER_ADDR_LEN); break; default: syslog(LOG_ERR, "<%s> unsupported link type(%d)", __func__, sdl->sdl_type); exit(1); } return; } int rtbuf_len(void) { size_t len; int mib[6] = {CTL_NET, AF_ROUTE, 0, AF_INET6, NET_RT_DUMP, 0}; if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) return (-1); return (len); } #define FILTER_MATCH(type, filter) ((0x1 << type) & filter) #define SIN6(s) ((struct sockaddr_in6 *)(s)) #define SDL(s) ((struct sockaddr_dl *)(s)) char * get_next_msg(char *buf, char *lim, int ifindex, size_t *lenp, int filter) { struct rt_msghdr *rtm; struct ifa_msghdr *ifam; struct sockaddr *sa, *dst, *gw, *ifa, *rti_info[RTAX_MAX]; *lenp = 0; for (rtm = (struct rt_msghdr *)buf; rtm < (struct rt_msghdr *)lim; rtm = (struct rt_msghdr *)(((char *)rtm) + rtm->rtm_msglen)) { /* just for safety */ if (!rtm->rtm_msglen) { syslog(LOG_WARNING, "<%s> rtm_msglen is 0 " "(buf=%p lim=%p rtm=%p)", __func__, buf, lim, rtm); break; } if (((struct rt_msghdr *)buf)->rtm_version != RTM_VERSION) { syslog(LOG_WARNING, "<%s> routing message version mismatch " "(buf=%p lim=%p rtm=%p)", __func__, buf, lim, rtm); continue; } if (FILTER_MATCH(rtm->rtm_type, filter) == 0) continue; switch (rtm->rtm_type) { case RTM_GET: case RTM_ADD: case RTM_DELETE: /* address related checks */ sa = (struct sockaddr *)(rtm + 1); get_rtaddrs(rtm->rtm_addrs, sa, rti_info); if ((dst = rti_info[RTAX_DST]) == NULL || dst->sa_family != AF_INET6) continue; if (IN6_IS_ADDR_LINKLOCAL(&SIN6(dst)->sin6_addr) || IN6_IS_ADDR_MULTICAST(&SIN6(dst)->sin6_addr)) continue; if ((gw = rti_info[RTAX_GATEWAY]) == NULL || gw->sa_family != AF_LINK) continue; if (ifindex && SDL(gw)->sdl_index != ifindex) continue; if (rti_info[RTAX_NETMASK] == NULL) continue; /* found */ *lenp = rtm->rtm_msglen; return (char *)rtm; /* NOTREACHED */ case RTM_NEWADDR: case RTM_DELADDR: ifam = (struct ifa_msghdr *)rtm; /* address related checks */ sa = (struct sockaddr *)(ifam + 1); get_rtaddrs(ifam->ifam_addrs, sa, rti_info); if ((ifa = rti_info[RTAX_IFA]) == NULL || (ifa->sa_family != AF_INET && ifa->sa_family != AF_INET6)) continue; if (ifa->sa_family == AF_INET6 && (IN6_IS_ADDR_LINKLOCAL(&SIN6(ifa)->sin6_addr) || IN6_IS_ADDR_MULTICAST(&SIN6(ifa)->sin6_addr))) continue; if (ifindex && ifam->ifam_index != ifindex) continue; /* found */ *lenp = ifam->ifam_msglen; return (char *)rtm; /* NOTREACHED */ case RTM_IFINFO: case RTM_IFANNOUNCE: /* found */ *lenp = rtm->rtm_msglen; return (char *)rtm; /* NOTREACHED */ } } return ((char *)rtm); } #undef FILTER_MATCH struct in6_addr * get_addr(char *buf) { struct rt_msghdr *rtm = (struct rt_msghdr *)buf; struct sockaddr *sa, *rti_info[RTAX_MAX]; sa = (struct sockaddr *)(rtm + 1); get_rtaddrs(rtm->rtm_addrs, sa, rti_info); return (&SIN6(rti_info[RTAX_DST])->sin6_addr); } int get_rtm_ifindex(char *buf) { struct rt_msghdr *rtm = (struct rt_msghdr *)buf; struct sockaddr *sa, *rti_info[RTAX_MAX]; sa = (struct sockaddr *)(rtm + 1); get_rtaddrs(rtm->rtm_addrs, sa, rti_info); return (((struct sockaddr_dl *)rti_info[RTAX_GATEWAY])->sdl_index); } int get_prefixlen(char *buf) { struct rt_msghdr *rtm = (struct rt_msghdr *)buf; struct sockaddr *sa, *rti_info[RTAX_MAX]; char *p, *lim; sa = (struct sockaddr *)(rtm + 1); get_rtaddrs(rtm->rtm_addrs, sa, rti_info); sa = rti_info[RTAX_NETMASK]; p = (char *)(&SIN6(sa)->sin6_addr); lim = (char *)sa + sa->sa_len; return prefixlen(p, lim); } int prefixlen(unsigned char *p, unsigned char *lim) { int masklen; for (masklen = 0; p < lim; p++) { switch (*p) { case 0xff: masklen += 8; break; case 0xfe: masklen += 7; break; case 0xfc: masklen += 6; break; case 0xf8: masklen += 5; break; case 0xf0: masklen += 4; break; case 0xe0: masklen += 3; break; case 0xc0: masklen += 2; break; case 0x80: masklen += 1; break; case 0x00: break; default: return (-1); } } return (masklen); } struct ifinfo * update_persist_ifinfo(struct ifilist_head_t *ifi_head, const char *ifname) { struct ifinfo *ifi; int ifindex; ifi = NULL; ifindex = if_nametoindex(ifname); TAILQ_FOREACH(ifi, ifi_head, ifi_next) { if (ifindex != 0) { if (ifindex == ifi->ifi_ifindex) break; } else { if (strncmp(ifname, ifi->ifi_ifname, sizeof(ifi->ifi_ifname)) == 0) break; } } if (ifi == NULL) { /* A new ifinfo element is needed. */ syslog(LOG_DEBUG, "<%s> new entry: %s", __func__, ifname); ELM_MALLOC(ifi, exit(1)); ifi->ifi_ifindex = 0; strlcpy(ifi->ifi_ifname, ifname, sizeof(ifi->ifi_ifname)); ifi->ifi_rainfo = NULL; ifi->ifi_state = IFI_STATE_UNCONFIGURED; TAILQ_INSERT_TAIL(ifi_head, ifi, ifi_next); } ifi->ifi_persist = 1; syslog(LOG_DEBUG, "<%s> %s is marked PERSIST", __func__, ifi->ifi_ifname); syslog(LOG_DEBUG, "<%s> %s is state = %d", __func__, ifi->ifi_ifname, ifi->ifi_state); return (ifi); } int update_ifinfo_nd_flags(struct ifinfo *ifi) { struct in6_ndireq nd; int s; int error; if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { syslog(LOG_ERR, "<%s> socket() failed.", __func__); return (1); } /* ND flags */ memset(&nd, 0, sizeof(nd)); strlcpy(nd.ifname, ifi->ifi_ifname, sizeof(nd.ifname)); error = ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd); if (error) { close(s); if (errno != EPFNOSUPPORT) syslog(LOG_ERR, "<%s> ioctl() failed.", __func__); return (1); } ifi->ifi_nd_flags = nd.ndi.flags; close(s); return (0); } struct ifinfo * update_ifinfo(struct ifilist_head_t *ifi_head, int ifindex) { struct if_msghdr *ifm; struct ifinfo *ifi = NULL; struct sockaddr *sa; struct sockaddr *rti_info[RTAX_MAX]; char *msg; size_t len; char *lim; int mib[] = { CTL_NET, PF_ROUTE, 0, AF_INET6, NET_RT_IFLIST, 0 }; int error; syslog(LOG_DEBUG, "<%s> enter", __func__); if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), NULL, &len, NULL, 0) < 0) { syslog(LOG_ERR, "<%s> sysctl: NET_RT_IFLIST size get failed", __func__); exit(1); } if ((msg = malloc(len)) == NULL) { syslog(LOG_ERR, "<%s> malloc failed", __func__); exit(1); } if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), msg, &len, NULL, 0) < 0) { syslog(LOG_ERR, "<%s> sysctl: NET_RT_IFLIST get failed", __func__); exit(1); } lim = msg + len; for (ifm = (struct if_msghdr *)msg; ifm != NULL && ifm < (struct if_msghdr *)lim; ifm = get_next_msghdr(ifm,(struct if_msghdr *)lim)) { int ifi_new; syslog(LOG_DEBUG, "<%s> ifm = %p, lim = %p, diff = %zu", __func__, ifm, lim, (char *)lim - (char *)ifm); if (ifm->ifm_version != RTM_VERSION) { syslog(LOG_ERR, "<%s> ifm_vesrion mismatch", __func__); exit(1); } if (ifm->ifm_msglen == 0) { syslog(LOG_WARNING, "<%s> ifm_msglen is 0", __func__); free(msg); return (NULL); } ifi_new = 0; if (ifm->ifm_type == RTM_IFINFO) { struct ifreq ifr; int s; char ifname[IFNAMSIZ]; syslog(LOG_DEBUG, "<%s> RTM_IFINFO found. " "ifm_index = %d, ifindex = %d", __func__, ifm->ifm_index, ifindex); /* when ifindex is specified */ if (ifindex != UPDATE_IFINFO_ALL && ifindex != ifm->ifm_index) continue; + /* ifname */ + if (if_indextoname(ifm->ifm_index, ifname) == NULL) { + syslog(LOG_WARNING, + "<%s> ifname not found (idx=%d)", + __func__, ifm->ifm_index); + continue; + } + /* lookup an entry with the same ifindex */ TAILQ_FOREACH(ifi, ifi_head, ifi_next) { if (ifm->ifm_index == ifi->ifi_ifindex) break; - if_indextoname(ifm->ifm_index, ifname); if (strncmp(ifname, ifi->ifi_ifname, sizeof(ifname)) == 0) break; } if (ifi == NULL) { syslog(LOG_DEBUG, "<%s> new entry for idx=%d", __func__, ifm->ifm_index); ELM_MALLOC(ifi, exit(1)); ifi->ifi_rainfo = NULL; ifi->ifi_state = IFI_STATE_UNCONFIGURED; ifi->ifi_persist = 0; ifi_new = 1; } /* ifindex */ ifi->ifi_ifindex = ifm->ifm_index; /* ifname */ - if_indextoname(ifm->ifm_index, ifi->ifi_ifname); - if (ifi->ifi_ifname == NULL) { - syslog(LOG_WARNING, - "<%s> ifname not found (idx=%d)", - __func__, ifm->ifm_index); - if (ifi_new) - free(ifi); - continue; - } + strlcpy(ifi->ifi_ifname, ifname, IFNAMSIZ); if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { syslog(LOG_ERR, "<%s> socket() failed.", __func__); if (ifi_new) free(ifi); continue; } /* MTU */ ifi->ifi_phymtu = ifm->ifm_data.ifi_mtu; if (ifi->ifi_phymtu == 0) { memset(&ifr, 0, sizeof(ifr)); ifr.ifr_addr.sa_family = AF_INET6; strlcpy(ifr.ifr_name, ifi->ifi_ifname, sizeof(ifr.ifr_name)); error = ioctl(s, SIOCGIFMTU, (caddr_t)&ifr); if (error) { close(s); syslog(LOG_ERR, "<%s> ioctl() failed.", __func__); if (ifi_new) free(ifi); continue; } ifi->ifi_phymtu = ifr.ifr_mtu; if (ifi->ifi_phymtu == 0) { syslog(LOG_WARNING, "<%s> no interface mtu info" " on %s. %d will be used.", __func__, ifi->ifi_ifname, IPV6_MMTU); ifi->ifi_phymtu = IPV6_MMTU; } } close(s); /* ND flags */ error = update_ifinfo_nd_flags(ifi); if (error) { if (ifi_new) free(ifi); continue; } /* SDL */ sa = (struct sockaddr *)(ifm + 1); get_rtaddrs(ifm->ifm_addrs, sa, rti_info); if ((sa = rti_info[RTAX_IFP]) != NULL) { if (sa->sa_family == AF_LINK) { memcpy(&ifi->ifi_sdl, (struct sockaddr_dl *)sa, sizeof(ifi->ifi_sdl)); } } else memset(&ifi->ifi_sdl, 0, sizeof(ifi->ifi_sdl)); /* flags */ ifi->ifi_flags = ifm->ifm_flags; /* type */ ifi->ifi_type = ifm->ifm_type; } else { syslog(LOG_ERR, "out of sync parsing NET_RT_IFLIST\n" "expected %d, got %d\n msglen = %d\n", RTM_IFINFO, ifm->ifm_type, ifm->ifm_msglen); exit(1); } if (ifi_new) { syslog(LOG_DEBUG, "<%s> adding %s(idx=%d) to ifilist", __func__, ifi->ifi_ifname, ifi->ifi_ifindex); TAILQ_INSERT_TAIL(ifi_head, ifi, ifi_next); } } free(msg); if (mcastif != NULL) { error = sock_mc_rr_update(&sock, mcastif); if (error) exit(1); } return (ifi); } static struct if_msghdr * get_next_msghdr(struct if_msghdr *ifm, struct if_msghdr *lim) { struct ifa_msghdr *ifam; for (ifam = (struct ifa_msghdr *)((char *)ifm + ifm->ifm_msglen); ifam < (struct ifa_msghdr *)lim; ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen)) { if (!ifam->ifam_msglen) { syslog(LOG_WARNING, "<%s> ifa_msglen is 0", __func__); return (NULL); } if (ifam->ifam_type != RTM_NEWADDR) break; } return ((struct if_msghdr *)ifam); } int getinet6sysctl(int code) { int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 }; int value; size_t size; mib[3] = code; size = sizeof(value); if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &value, &size, NULL, 0) < 0) { syslog(LOG_ERR, "<%s>: failed to get ip6 sysctl(%d): %s", __func__, code, strerror(errno)); return (-1); } else return (value); } int sock_mc_join(struct sockinfo *s, int ifindex) { struct ipv6_mreq mreq; char ifname[IFNAMSIZ]; syslog(LOG_DEBUG, "<%s> enter", __func__); if (ifindex == 0) return (1); /* * join all routers multicast address on each advertising * interface. */ memset(&mreq, 0, sizeof(mreq)); /* XXX */ memcpy(&mreq.ipv6mr_multiaddr.s6_addr, &sin6_linklocal_allrouters.sin6_addr, sizeof(mreq.ipv6mr_multiaddr.s6_addr)); mreq.ipv6mr_interface = ifindex; if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) < 0) { syslog(LOG_ERR, "<%s> IPV6_JOIN_GROUP(link) on %s: %s", __func__, if_indextoname(ifindex, ifname), strerror(errno)); return (1); } syslog(LOG_DEBUG, "<%s> %s: join link-local all-routers MC group", __func__, if_indextoname(ifindex, ifname)); return (0); } int sock_mc_leave(struct sockinfo *s, int ifindex) { struct ipv6_mreq mreq; char ifname[IFNAMSIZ]; syslog(LOG_DEBUG, "<%s> enter", __func__); if (ifindex == 0) return (1); /* * join all routers multicast address on each advertising * interface. */ memset(&mreq, 0, sizeof(mreq)); /* XXX */ memcpy(&mreq.ipv6mr_multiaddr.s6_addr, &sin6_linklocal_allrouters.sin6_addr, sizeof(mreq.ipv6mr_multiaddr.s6_addr)); mreq.ipv6mr_interface = ifindex; if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_LEAVE_GROUP, &mreq, sizeof(mreq)) < 0) { syslog(LOG_ERR, "<%s> IPV6_JOIN_LEAVE(link) on %s: %s", __func__, if_indextoname(ifindex, ifname), strerror(errno)); return (1); } syslog(LOG_DEBUG, "<%s> %s: leave link-local all-routers MC group", __func__, if_indextoname(ifindex, ifname)); return (0); } int sock_mc_rr_update(struct sockinfo *s, char *mif) { struct ipv6_mreq mreq; syslog(LOG_DEBUG, "<%s> enter", __func__); if (mif == NULL) return (1); /* * When attending router renumbering, join all-routers site-local * multicast group. */ /* XXX */ memcpy(&mreq.ipv6mr_multiaddr.s6_addr, &sin6_sitelocal_allrouters.sin6_addr, sizeof(mreq.ipv6mr_multiaddr.s6_addr)); if ((mreq.ipv6mr_interface = if_nametoindex(mif)) == 0) { syslog(LOG_ERR, "<%s> invalid interface: %s", __func__, mif); return (1); } if (setsockopt(s->si_fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) < 0) { syslog(LOG_ERR, "<%s> IPV6_JOIN_GROUP(site) on %s: %s", __func__, mif, strerror(errno)); return (1); } syslog(LOG_DEBUG, "<%s> %s: join site-local all-routers MC group", __func__, mif); return (0); } Index: stable/11 =================================================================== --- stable/11 (revision 311288) +++ stable/11 (revision 311289) Property changes on: stable/11 ___________________________________________________________________ Modified: svn:mergeinfo ## -0,0 +0,1 ## Merged /head:r308216