diff options
Diffstat (limited to 'usr.sbin/rtadvd/config.c')
| -rw-r--r-- | usr.sbin/rtadvd/config.c | 1080 |
1 files changed, 0 insertions, 1080 deletions
diff --git a/usr.sbin/rtadvd/config.c b/usr.sbin/rtadvd/config.c deleted file mode 100644 index 5eadcc5..0000000 --- a/usr.sbin/rtadvd/config.c +++ /dev/null @@ -1,1080 +0,0 @@ -/* $FreeBSD$ */ -/* $KAME: config.c,v 1.84 2003/08/05 12:34:23 itojun Exp $ */ - -/* - * Copyright (C) 1998 WIDE Project. - * 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 <sys/param.h> -#include <sys/ioctl.h> -#include <sys/socket.h> -#include <sys/time.h> -#include <sys/sysctl.h> - -#include <net/if.h> -#include <net/if_var.h> -#include <net/route.h> -#include <net/if_dl.h> - -#include <netinet/in.h> -#include <netinet/in_var.h> -#include <netinet/ip6.h> -#include <netinet6/ip6_var.h> -#include <netinet/icmp6.h> -#include <netinet6/nd6.h> - -#include <arpa/inet.h> - -#include <stdio.h> -#include <syslog.h> -#include <errno.h> -#include <string.h> -#include <search.h> -#include <stdlib.h> -#include <unistd.h> -#include <ifaddrs.h> - -#include "rtadvd.h" -#include "advcap.h" -#include "timer.h" -#include "if.h" -#include "config.h" - -static time_t prefix_timo = (60 * 120); /* 2 hours. - * XXX: should be configurable. */ -extern struct rainfo *ralist; - -static struct rtadvd_timer *prefix_timeout(void *); -static void makeentry(char *, size_t, int, char *); -static int getinet6sysctl(int); - -void -getconfig(intface) - char *intface; -{ - int stat, i; - char tbuf[BUFSIZ]; - struct rainfo *tmp; - long val; - int64_t val64; - char buf[BUFSIZ]; - char *bp = buf; - char *addr, *flagstr; - static int forwarding = -1; - -#define MUSTHAVE(var, cap) \ - do { \ - int64_t t; \ - if ((t = agetnum(cap)) < 0) { \ - fprintf(stderr, "rtadvd: need %s for interface %s\n", \ - cap, intface); \ - exit(1); \ - } \ - var = t; \ - } while (0) -#define MAYHAVE(var, cap, def) \ - do { \ - if ((var = agetnum(cap)) < 0) \ - var = def; \ - } while (0) - - if ((stat = agetent(tbuf, intface)) <= 0) { - memset(tbuf, 0, sizeof(tbuf)); - syslog(LOG_INFO, - "<%s> %s isn't defined in the configuration file" - " or the configuration file doesn't exist." - " Treat it as default", - __func__, intface); - } - - tmp = (struct rainfo *)malloc(sizeof(*ralist)); - if (tmp == NULL) { - syslog(LOG_INFO, "<%s> %s: can't allocate enough memory", - __func__, intface); - exit(1); - } - memset(tmp, 0, sizeof(*tmp)); - tmp->prefix.next = tmp->prefix.prev = &tmp->prefix; -#ifdef ROUTEINFO - tmp->route.next = tmp->route.prev = &tmp->route; -#endif - - /* check if we are allowed to forward packets (if not determined) */ - if (forwarding < 0) { - if ((forwarding = getinet6sysctl(IPV6CTL_FORWARDING)) < 0) - exit(1); - } - - /* get interface information */ - if (agetflag("nolladdr")) - tmp->advlinkopt = 0; - else - tmp->advlinkopt = 1; - if (tmp->advlinkopt) { - if ((tmp->sdl = if_nametosdl(intface)) == NULL) { - syslog(LOG_ERR, - "<%s> can't get information of %s", - __func__, intface); - exit(1); - } - tmp->ifindex = tmp->sdl->sdl_index; - } else - tmp->ifindex = if_nametoindex(intface); - strncpy(tmp->ifname, intface, sizeof(tmp->ifname)); - if ((tmp->phymtu = if_getmtu(intface)) == 0) { - tmp->phymtu = IPV6_MMTU; - syslog(LOG_WARNING, - "<%s> can't get interface mtu of %s. Treat as %d", - __func__, intface, IPV6_MMTU); - } - - /* - * set router configuration variables. - */ - MAYHAVE(val, "maxinterval", DEF_MAXRTRADVINTERVAL); - if (val < MIN_MAXINTERVAL || val > MAX_MAXINTERVAL) { - syslog(LOG_ERR, - "<%s> maxinterval (%ld) on %s is invalid " - "(must be between %u and %u)", __func__, val, - intface, MIN_MAXINTERVAL, MAX_MAXINTERVAL); - exit(1); - } - tmp->maxinterval = (u_int)val; - MAYHAVE(val, "mininterval", tmp->maxinterval/3); - if (val < MIN_MININTERVAL || val > (tmp->maxinterval * 3) / 4) { - syslog(LOG_ERR, - "<%s> mininterval (%ld) on %s is invalid " - "(must be between %d and %d)", - __func__, val, intface, MIN_MININTERVAL, - (tmp->maxinterval * 3) / 4); - exit(1); - } - tmp->mininterval = (u_int)val; - - MAYHAVE(val, "chlim", DEF_ADVCURHOPLIMIT); - tmp->hoplimit = val & 0xff; - - if ((flagstr = (char *)agetstr("raflags", &bp))) { - val = 0; - if (strchr(flagstr, 'm')) - val |= ND_RA_FLAG_MANAGED; - if (strchr(flagstr, 'o')) - val |= ND_RA_FLAG_OTHER; - if (strchr(flagstr, 'h')) - val |= ND_RA_FLAG_RTPREF_HIGH; - if (strchr(flagstr, 'l')) { - if ((val & ND_RA_FLAG_RTPREF_HIGH)) { - syslog(LOG_ERR, "<%s> the \'h\' and \'l\'" - " router flags are exclusive", __func__); - exit(1); - } - val |= ND_RA_FLAG_RTPREF_LOW; - } - } else { - MAYHAVE(val, "raflags", 0); - } - tmp->managedflg = val & ND_RA_FLAG_MANAGED; - tmp->otherflg = val & ND_RA_FLAG_OTHER; -#ifndef ND_RA_FLAG_RTPREF_MASK -#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */ -#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */ -#endif - tmp->rtpref = val & ND_RA_FLAG_RTPREF_MASK; - if (tmp->rtpref == ND_RA_FLAG_RTPREF_RSV) { - syslog(LOG_ERR, "<%s> invalid router preference (%02x) on %s", - __func__, tmp->rtpref, intface); - exit(1); - } - - MAYHAVE(val, "rltime", tmp->maxinterval * 3); - if (val && (val < tmp->maxinterval || val > MAXROUTERLIFETIME)) { - syslog(LOG_ERR, - "<%s> router lifetime (%ld) on %s is invalid " - "(must be 0 or between %d and %d)", - __func__, val, intface, - tmp->maxinterval, - MAXROUTERLIFETIME); - exit(1); - } - /* - * Basically, hosts MUST NOT send Router Advertisement messages at any - * time (RFC 2461, Section 6.2.3). However, it would sometimes be - * useful to allow hosts to advertise some parameters such as prefix - * information and link MTU. Thus, we allow hosts to invoke rtadvd - * only when router lifetime (on every advertising interface) is - * explicitly set zero. (see also the above section) - */ - if (val && forwarding == 0) { - syslog(LOG_ERR, - "<%s> non zero router lifetime is specified for %s, " - "which must not be allowed for hosts. you must " - "change router lifetime or enable IPv6 forwarding.", - __func__, intface); - exit(1); - } - tmp->lifetime = val & 0xffff; - - MAYHAVE(val, "rtime", DEF_ADVREACHABLETIME); - if (val < 0 || val > MAXREACHABLETIME) { - syslog(LOG_ERR, - "<%s> reachable time (%ld) on %s is invalid " - "(must be no greater than %d)", - __func__, val, intface, MAXREACHABLETIME); - exit(1); - } - tmp->reachabletime = (u_int32_t)val; - - MAYHAVE(val64, "retrans", DEF_ADVRETRANSTIMER); - if (val64 < 0 || val64 > 0xffffffff) { - syslog(LOG_ERR, "<%s> retrans time (%lld) on %s out of range", - __func__, (long long)val64, intface); - exit(1); - } - tmp->retranstimer = (u_int32_t)val64; - - if (agetnum("hapref") != -1 || agetnum("hatime") != -1) { - syslog(LOG_ERR, - "<%s> mobile-ip6 configuration not supported", - __func__); - exit(1); - } - /* prefix information */ - - /* - * This is an implementation specific parameter to consider - * link propagation delays and poorly synchronized clocks when - * checking consistency of advertised lifetimes. - */ - MAYHAVE(val, "clockskew", 0); - tmp->clockskew = val; - - tmp->pfxs = 0; - for (i = -1; i < MAXPREFIX; i++) { - struct prefix *pfx; - char entbuf[256]; - - makeentry(entbuf, sizeof(entbuf), i, "addr"); - addr = (char *)agetstr(entbuf, &bp); - if (addr == NULL) - continue; - - /* allocate memory to store prefix information */ - if ((pfx = malloc(sizeof(struct prefix))) == NULL) { - syslog(LOG_ERR, - "<%s> can't allocate enough memory", - __func__); - exit(1); - } - memset(pfx, 0, sizeof(*pfx)); - - /* link into chain */ - insque(pfx, &tmp->prefix); - tmp->pfxs++; - pfx->rainfo = tmp; - - pfx->origin = PREFIX_FROM_CONFIG; - - if (inet_pton(AF_INET6, addr, &pfx->prefix) != 1) { - syslog(LOG_ERR, - "<%s> inet_pton failed for %s", - __func__, addr); - exit(1); - } - if (IN6_IS_ADDR_MULTICAST(&pfx->prefix)) { - syslog(LOG_ERR, - "<%s> multicast prefix (%s) must " - "not be advertised on %s", - __func__, addr, intface); - exit(1); - } - if (IN6_IS_ADDR_LINKLOCAL(&pfx->prefix)) - syslog(LOG_NOTICE, - "<%s> link-local prefix (%s) will be" - " advertised on %s", - __func__, addr, intface); - - makeentry(entbuf, sizeof(entbuf), i, "prefixlen"); - MAYHAVE(val, entbuf, 64); - if (val < 0 || val > 128) { - syslog(LOG_ERR, "<%s> prefixlen (%ld) for %s " - "on %s out of range", - __func__, val, addr, intface); - exit(1); - } - pfx->prefixlen = (int)val; - - makeentry(entbuf, sizeof(entbuf), i, "pinfoflags"); - if ((flagstr = (char *)agetstr(entbuf, &bp))) { - val = 0; - if (strchr(flagstr, 'l')) - val |= ND_OPT_PI_FLAG_ONLINK; - if (strchr(flagstr, 'a')) - val |= ND_OPT_PI_FLAG_AUTO; - } else { - MAYHAVE(val, entbuf, - (ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO)); - } - pfx->onlinkflg = val & ND_OPT_PI_FLAG_ONLINK; - pfx->autoconfflg = val & ND_OPT_PI_FLAG_AUTO; - - makeentry(entbuf, sizeof(entbuf), i, "vltime"); - MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME); - if (val64 < 0 || val64 > 0xffffffff) { - syslog(LOG_ERR, "<%s> vltime (%lld) for " - "%s/%d on %s is out of range", - __func__, (long long)val64, - addr, pfx->prefixlen, intface); - exit(1); - } - pfx->validlifetime = (u_int32_t)val64; - - makeentry(entbuf, sizeof(entbuf), i, "vltimedecr"); - if (agetflag(entbuf)) { - struct timeval now; - gettimeofday(&now, 0); - pfx->vltimeexpire = - now.tv_sec + pfx->validlifetime; - } - - makeentry(entbuf, sizeof(entbuf), i, "pltime"); - MAYHAVE(val64, entbuf, DEF_ADVPREFERREDLIFETIME); - if (val64 < 0 || val64 > 0xffffffff) { - syslog(LOG_ERR, - "<%s> pltime (%lld) for %s/%d on %s " - "is out of range", - __func__, (long long)val64, - addr, pfx->prefixlen, intface); - exit(1); - } - pfx->preflifetime = (u_int32_t)val64; - - makeentry(entbuf, sizeof(entbuf), i, "pltimedecr"); - if (agetflag(entbuf)) { - struct timeval now; - gettimeofday(&now, 0); - pfx->pltimeexpire = - now.tv_sec + pfx->preflifetime; - } - } - if (tmp->pfxs == 0) - get_prefix(tmp); - - MAYHAVE(val, "mtu", 0); - if (val < 0 || val > 0xffffffff) { - syslog(LOG_ERR, - "<%s> mtu (%ld) on %s out of range", - __func__, val, intface); - exit(1); - } - tmp->linkmtu = (u_int32_t)val; - if (tmp->linkmtu == 0) { - char *mtustr; - - if ((mtustr = (char *)agetstr("mtu", &bp)) && - strcmp(mtustr, "auto") == 0) - tmp->linkmtu = tmp->phymtu; - } - else if (tmp->linkmtu < IPV6_MMTU || tmp->linkmtu > tmp->phymtu) { - syslog(LOG_ERR, - "<%s> advertised link mtu (%lu) on %s is invalid (must " - "be between least MTU (%d) and physical link MTU (%d)", - __func__, (unsigned long)tmp->linkmtu, intface, - IPV6_MMTU, tmp->phymtu); - exit(1); - } - -#ifdef SIOCSIFINFO_IN6 - { - struct in6_ndireq ndi; - int s; - - if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { - syslog(LOG_ERR, "<%s> socket: %s", __func__, - strerror(errno)); - exit(1); - } - memset(&ndi, 0, sizeof(ndi)); - strncpy(ndi.ifname, intface, IFNAMSIZ); - if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&ndi) < 0) { - syslog(LOG_INFO, "<%s> ioctl:SIOCGIFINFO_IN6 at %s: %s", - __func__, intface, strerror(errno)); - } - - /* reflect the RA info to the host variables in kernel */ - ndi.ndi.chlim = tmp->hoplimit; - ndi.ndi.retrans = tmp->retranstimer; - ndi.ndi.basereachable = tmp->reachabletime; - if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&ndi) < 0) { - syslog(LOG_INFO, "<%s> ioctl:SIOCSIFINFO_IN6 at %s: %s", - __func__, intface, strerror(errno)); - } - close(s); - } -#endif - - /* route information */ -#ifdef ROUTEINFO - tmp->routes = 0; - for (i = -1; i < MAXROUTE; i++) { - struct rtinfo *rti; - char entbuf[256], oentbuf[256]; - - makeentry(entbuf, sizeof(entbuf), i, "rtprefix"); - addr = (char *)agetstr(entbuf, &bp); - if (addr == NULL) { - makeentry(oentbuf, sizeof(oentbuf), i, "rtrprefix"); - addr = (char *)agetstr(oentbuf, &bp); - if (addr) { - fprintf(stderr, "%s was obsoleted. Use %s.\n", - oentbuf, entbuf); - } - } - if (addr == NULL) - continue; - - /* allocate memory to store prefix information */ - if ((rti = malloc(sizeof(struct rtinfo))) == NULL) { - syslog(LOG_ERR, - "<%s> can't allocate enough memory", - __func__); - exit(1); - } - memset(rti, 0, sizeof(*rti)); - - /* link into chain */ - insque(rti, &tmp->route); - tmp->routes++; - - if (inet_pton(AF_INET6, addr, &rti->prefix) != 1) { - syslog(LOG_ERR, "<%s> inet_pton failed for %s", - __func__, addr); - exit(1); - } -#if 0 - /* - * XXX: currently there's no restriction in route information - * prefix according to - * draft-ietf-ipngwg-router-selection-00.txt. - * However, I think the similar restriction be necessary. - */ - MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME); - if (IN6_IS_ADDR_MULTICAST(&rti->prefix)) { - syslog(LOG_ERR, - "<%s> multicast route (%s) must " - "not be advertised on %s", - __func__, addr, intface); - exit(1); - } - if (IN6_IS_ADDR_LINKLOCAL(&rti->prefix)) { - syslog(LOG_NOTICE, - "<%s> link-local route (%s) will " - "be advertised on %s", - __func__, addr, intface); - exit(1); - } -#endif - - makeentry(entbuf, sizeof(entbuf), i, "rtplen"); - /* XXX: 256 is a magic number for compatibility check. */ - MAYHAVE(val, entbuf, 256); - if (val == 256) { - makeentry(oentbuf, sizeof(oentbuf), i, "rtrplen"); - MAYHAVE(val, oentbuf, 256); - if (val != 256) { - fprintf(stderr, "%s was obsoleted. Use %s.\n", - oentbuf, entbuf); - } else - val = 64; - } - if (val < 0 || val > 128) { - syslog(LOG_ERR, "<%s> prefixlen (%ld) for %s on %s " - "out of range", - __func__, val, addr, intface); - exit(1); - } - rti->prefixlen = (int)val; - - makeentry(entbuf, sizeof(entbuf), i, "rtflags"); - if ((flagstr = (char *)agetstr(entbuf, &bp))) { - val = 0; - if (strchr(flagstr, 'h')) - val |= ND_RA_FLAG_RTPREF_HIGH; - if (strchr(flagstr, 'l')) { - if ((val & ND_RA_FLAG_RTPREF_HIGH)) { - syslog(LOG_ERR, - "<%s> the \'h\' and \'l\' route" - " preferences are exclusive", - __func__); - exit(1); - } - val |= ND_RA_FLAG_RTPREF_LOW; - } - } else - MAYHAVE(val, entbuf, 256); /* XXX */ - if (val == 256) { - makeentry(oentbuf, sizeof(oentbuf), i, "rtrflags"); - MAYHAVE(val, oentbuf, 256); - if (val != 256) { - fprintf(stderr, "%s was obsoleted. Use %s.\n", - oentbuf, entbuf); - } else - val = 0; - } - rti->rtpref = val & ND_RA_FLAG_RTPREF_MASK; - if (rti->rtpref == ND_RA_FLAG_RTPREF_RSV) { - syslog(LOG_ERR, "<%s> invalid route preference (%02x) " - "for %s/%d on %s", - __func__, rti->rtpref, addr, - rti->prefixlen, intface); - exit(1); - } - - /* - * Since the spec does not a default value, we should make - * this entry mandatory. However, FreeBSD 4.4 has shipped - * with this field being optional, we use the router lifetime - * as an ad-hoc default value with a warning message. - */ - makeentry(entbuf, sizeof(entbuf), i, "rtltime"); - MAYHAVE(val64, entbuf, -1); - if (val64 == -1) { - makeentry(oentbuf, sizeof(oentbuf), i, "rtrltime"); - MAYHAVE(val64, oentbuf, -1); - if (val64 != -1) { - fprintf(stderr, "%s was obsoleted. Use %s.\n", - oentbuf, entbuf); - } else { - fprintf(stderr, "%s should be specified " - "for interface %s.\n", - entbuf, intface); - val64 = tmp->lifetime; - } - } - if (val64 < 0 || val64 > 0xffffffff) { - syslog(LOG_ERR, "<%s> route lifetime (%lld) for " - "%s/%d on %s out of range", __func__, - (long long)val64, addr, rti->prefixlen, intface); - exit(1); - } - rti->ltime = (u_int32_t)val64; - } -#endif - - /* okey */ - tmp->next = ralist; - ralist = tmp; - - /* construct the sending packet */ - make_packet(tmp); - - /* set timer */ - tmp->timer = rtadvd_add_timer(ra_timeout, ra_timer_update, - tmp, tmp); - ra_timer_update((void *)tmp, &tmp->timer->tm); - rtadvd_set_timer(&tmp->timer->tm, tmp->timer); -} - -void -get_prefix(struct rainfo *rai) -{ - struct ifaddrs *ifap, *ifa; - struct prefix *pp; - struct in6_addr *a; - u_char *p, *ep, *m, *lim; - u_char ntopbuf[INET6_ADDRSTRLEN]; - - if (getifaddrs(&ifap) < 0) { - syslog(LOG_ERR, - "<%s> can't get interface addresses", - __func__); - exit(1); - } - - for (ifa = ifap; ifa; ifa = ifa->ifa_next) { - int plen; - - if (strcmp(ifa->ifa_name, rai->ifname) != 0) - continue; - if (ifa->ifa_addr->sa_family != AF_INET6) - continue; - a = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; - if (IN6_IS_ADDR_LINKLOCAL(a)) - continue; - /* get prefix length */ - m = (u_char *)&((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr; - lim = (u_char *)(ifa->ifa_netmask) + ifa->ifa_netmask->sa_len; - plen = prefixlen(m, lim); - if (plen <= 0 || plen > 128) { - syslog(LOG_ERR, "<%s> failed to get prefixlen " - "or prefix is invalid", - __func__); - exit(1); - } - if (plen == 128) /* XXX */ - continue; - if (find_prefix(rai, a, plen)) { - /* ignore a duplicated prefix. */ - continue; - } - - /* allocate memory to store prefix info. */ - if ((pp = malloc(sizeof(*pp))) == NULL) { - syslog(LOG_ERR, - "<%s> can't get allocate buffer for prefix", - __func__); - exit(1); - } - memset(pp, 0, sizeof(*pp)); - - /* set prefix, sweep bits outside of prefixlen */ - pp->prefixlen = plen; - memcpy(&pp->prefix, a, sizeof(*a)); - p = (u_char *)&pp->prefix; - ep = (u_char *)(&pp->prefix + 1); - while (m < lim && p < ep) - *p++ &= *m++; - while (p < ep) - *p++ = 0x00; - if (!inet_ntop(AF_INET6, &pp->prefix, ntopbuf, - sizeof(ntopbuf))) { - syslog(LOG_ERR, "<%s> inet_ntop failed", __func__); - exit(1); - } - syslog(LOG_DEBUG, - "<%s> add %s/%d to prefix list on %s", - __func__, ntopbuf, pp->prefixlen, rai->ifname); - - /* set other fields with protocol defaults */ - pp->validlifetime = DEF_ADVVALIDLIFETIME; - pp->preflifetime = DEF_ADVPREFERREDLIFETIME; - pp->onlinkflg = 1; - pp->autoconfflg = 1; - pp->origin = PREFIX_FROM_KERNEL; - pp->rainfo = rai; - - /* link into chain */ - insque(pp, &rai->prefix); - - /* counter increment */ - rai->pfxs++; - } - - freeifaddrs(ifap); -} - -static void -makeentry(buf, len, id, string) - char *buf; - size_t len; - int id; - char *string; -{ - - if (id < 0) - strlcpy(buf, string, len); - else - snprintf(buf, len, "%s%d", string, id); -} - -/* - * Add a prefix to the list of specified interface and reconstruct - * the outgoing packet. - * The prefix must not be in the list. - * XXX: other parameters of the prefix (e.g. lifetime) should be - * able to be specified. - */ -static void -add_prefix(struct rainfo *rai, struct in6_prefixreq *ipr) -{ - struct prefix *prefix; - u_char ntopbuf[INET6_ADDRSTRLEN]; - - if ((prefix = malloc(sizeof(*prefix))) == NULL) { - syslog(LOG_ERR, "<%s> memory allocation failed", - __func__); - return; /* XXX: error or exit? */ - } - memset(prefix, 0, sizeof(*prefix)); - prefix->prefix = ipr->ipr_prefix.sin6_addr; - prefix->prefixlen = ipr->ipr_plen; - prefix->validlifetime = ipr->ipr_vltime; - prefix->preflifetime = ipr->ipr_pltime; - prefix->onlinkflg = ipr->ipr_raf_onlink; - prefix->autoconfflg = ipr->ipr_raf_auto; - prefix->origin = PREFIX_FROM_DYNAMIC; - - insque(prefix, &rai->prefix); - prefix->rainfo = rai; - - syslog(LOG_DEBUG, "<%s> new prefix %s/%d was added on %s", - __func__, inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, - ntopbuf, INET6_ADDRSTRLEN), - ipr->ipr_plen, rai->ifname); - - /* free the previous packet */ - free(rai->ra_data); - rai->ra_data = NULL; - - /* reconstruct the packet */ - rai->pfxs++; - make_packet(rai); -} - -/* - * Delete a prefix to the list of specified interface and reconstruct - * the outgoing packet. - * The prefix must be in the list. - */ -void -delete_prefix(struct prefix *prefix) -{ - u_char ntopbuf[INET6_ADDRSTRLEN]; - struct rainfo *rai = prefix->rainfo; - - remque(prefix); - syslog(LOG_DEBUG, "<%s> prefix %s/%d was deleted on %s", - __func__, inet_ntop(AF_INET6, &prefix->prefix, - ntopbuf, INET6_ADDRSTRLEN), - prefix->prefixlen, rai->ifname); - if (prefix->timer) - rtadvd_remove_timer(&prefix->timer); - free(prefix); - rai->pfxs--; -} - -void -invalidate_prefix(struct prefix *prefix) -{ - u_char ntopbuf[INET6_ADDRSTRLEN]; - struct timeval timo; - struct rainfo *rai = prefix->rainfo; - - if (prefix->timer) { /* sanity check */ - syslog(LOG_ERR, - "<%s> assumption failure: timer already exists", - __func__); - exit(1); - } - - syslog(LOG_DEBUG, "<%s> prefix %s/%d was invalidated on %s, " - "will expire in %ld seconds", __func__, - inet_ntop(AF_INET6, &prefix->prefix, ntopbuf, INET6_ADDRSTRLEN), - prefix->prefixlen, rai->ifname, (long)prefix_timo); - - /* set the expiration timer */ - prefix->timer = rtadvd_add_timer(prefix_timeout, NULL, prefix, NULL); - if (prefix->timer == NULL) { - syslog(LOG_ERR, "<%s> failed to add a timer for a prefix. " - "remove the prefix", __func__); - delete_prefix(prefix); - } - timo.tv_sec = prefix_timo; - timo.tv_usec = 0; - rtadvd_set_timer(&timo, prefix->timer); -} - -static struct rtadvd_timer * -prefix_timeout(void *arg) -{ - struct prefix *prefix = (struct prefix *)arg; - - delete_prefix(prefix); - - return(NULL); -} - -void -update_prefix(struct prefix * prefix) -{ - u_char ntopbuf[INET6_ADDRSTRLEN]; - struct rainfo *rai = prefix->rainfo; - - if (prefix->timer == NULL) { /* sanity check */ - syslog(LOG_ERR, - "<%s> assumption failure: timer does not exist", - __func__); - exit(1); - } - - syslog(LOG_DEBUG, "<%s> prefix %s/%d was re-enabled on %s", - __func__, inet_ntop(AF_INET6, &prefix->prefix, ntopbuf, - INET6_ADDRSTRLEN), prefix->prefixlen, rai->ifname); - - /* stop the expiration timer */ - rtadvd_remove_timer(&prefix->timer); -} - -/* - * Try to get an in6_prefixreq contents for a prefix which matches - * ipr->ipr_prefix and ipr->ipr_plen and belongs to - * the interface whose name is ipr->ipr_name[]. - */ -static int -init_prefix(struct in6_prefixreq *ipr) -{ -#if 0 - int s; - - if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { - syslog(LOG_ERR, "<%s> socket: %s", __func__, - strerror(errno)); - exit(1); - } - - if (ioctl(s, SIOCGIFPREFIX_IN6, (caddr_t)ipr) < 0) { - syslog(LOG_INFO, "<%s> ioctl:SIOCGIFPREFIX %s", __func__, - strerror(errno)); - - ipr->ipr_vltime = DEF_ADVVALIDLIFETIME; - ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME; - ipr->ipr_raf_onlink = 1; - ipr->ipr_raf_auto = 1; - /* omit other field initialization */ - } - else if (ipr->ipr_origin < PR_ORIG_RR) { - u_char ntopbuf[INET6_ADDRSTRLEN]; - - syslog(LOG_WARNING, "<%s> Added prefix(%s)'s origin %d is" - "lower than PR_ORIG_RR(router renumbering)." - "This should not happen if I am router", __func__, - inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf, - sizeof(ntopbuf)), ipr->ipr_origin); - close(s); - return 1; - } - - close(s); - return 0; -#else - ipr->ipr_vltime = DEF_ADVVALIDLIFETIME; - ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME; - ipr->ipr_raf_onlink = 1; - ipr->ipr_raf_auto = 1; - return 0; -#endif -} - -void -make_prefix(struct rainfo *rai, int ifindex, struct in6_addr *addr, int plen) -{ - struct in6_prefixreq ipr; - - memset(&ipr, 0, sizeof(ipr)); - if (if_indextoname(ifindex, ipr.ipr_name) == NULL) { - syslog(LOG_ERR, "<%s> Prefix added interface No.%d doesn't" - "exist. This should not happen! %s", __func__, - ifindex, strerror(errno)); - exit(1); - } - ipr.ipr_prefix.sin6_len = sizeof(ipr.ipr_prefix); - ipr.ipr_prefix.sin6_family = AF_INET6; - ipr.ipr_prefix.sin6_addr = *addr; - ipr.ipr_plen = plen; - - if (init_prefix(&ipr)) - return; /* init failed by some error */ - add_prefix(rai, &ipr); -} - -void -make_packet(struct rainfo *rainfo) -{ - size_t packlen, lladdroptlen = 0; - char *buf; - struct nd_router_advert *ra; - struct nd_opt_prefix_info *ndopt_pi; - struct nd_opt_mtu *ndopt_mtu; -#ifdef ROUTEINFO - struct nd_opt_route_info *ndopt_rti; - struct rtinfo *rti; -#endif - struct prefix *pfx; - - /* calculate total length */ - packlen = sizeof(struct nd_router_advert); - if (rainfo->advlinkopt) { - if ((lladdroptlen = lladdropt_length(rainfo->sdl)) == 0) { - syslog(LOG_INFO, - "<%s> link-layer address option has" - " null length on %s. Treat as not included.", - __func__, rainfo->ifname); - rainfo->advlinkopt = 0; - } - packlen += lladdroptlen; - } - if (rainfo->pfxs) - packlen += sizeof(struct nd_opt_prefix_info) * rainfo->pfxs; - if (rainfo->linkmtu) - packlen += sizeof(struct nd_opt_mtu); -#ifdef ROUTEINFO - for (rti = rainfo->route.next; rti != &rainfo->route; rti = rti->next) - packlen += sizeof(struct nd_opt_route_info) + - ((rti->prefixlen + 0x3f) >> 6) * 8; -#endif - - /* allocate memory for the packet */ - if ((buf = malloc(packlen)) == NULL) { - syslog(LOG_ERR, - "<%s> can't get enough memory for an RA packet", - __func__); - exit(1); - } - if (rainfo->ra_data) { - /* free the previous packet */ - free(rainfo->ra_data); - rainfo->ra_data = NULL; - } - rainfo->ra_data = buf; - /* XXX: what if packlen > 576? */ - rainfo->ra_datalen = packlen; - - /* - * construct the packet - */ - ra = (struct nd_router_advert *)buf; - ra->nd_ra_type = ND_ROUTER_ADVERT; - ra->nd_ra_code = 0; - ra->nd_ra_cksum = 0; - ra->nd_ra_curhoplimit = (u_int8_t)(0xff & rainfo->hoplimit); - ra->nd_ra_flags_reserved = 0; /* just in case */ - /* - * XXX: the router preference field, which is a 2-bit field, should be - * initialized before other fields. - */ - ra->nd_ra_flags_reserved = 0xff & rainfo->rtpref; - ra->nd_ra_flags_reserved |= - rainfo->managedflg ? ND_RA_FLAG_MANAGED : 0; - ra->nd_ra_flags_reserved |= - rainfo->otherflg ? ND_RA_FLAG_OTHER : 0; - ra->nd_ra_router_lifetime = htons(rainfo->lifetime); - ra->nd_ra_reachable = htonl(rainfo->reachabletime); - ra->nd_ra_retransmit = htonl(rainfo->retranstimer); - buf += sizeof(*ra); - - if (rainfo->advlinkopt) { - lladdropt_fill(rainfo->sdl, (struct nd_opt_hdr *)buf); - buf += lladdroptlen; - } - - if (rainfo->linkmtu) { - ndopt_mtu = (struct nd_opt_mtu *)buf; - ndopt_mtu->nd_opt_mtu_type = ND_OPT_MTU; - ndopt_mtu->nd_opt_mtu_len = 1; - ndopt_mtu->nd_opt_mtu_reserved = 0; - ndopt_mtu->nd_opt_mtu_mtu = htonl(rainfo->linkmtu); - buf += sizeof(struct nd_opt_mtu); - } - - for (pfx = rainfo->prefix.next; - pfx != &rainfo->prefix; pfx = pfx->next) { - u_int32_t vltime, pltime; - struct timeval now; - - ndopt_pi = (struct nd_opt_prefix_info *)buf; - ndopt_pi->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION; - ndopt_pi->nd_opt_pi_len = 4; - ndopt_pi->nd_opt_pi_prefix_len = pfx->prefixlen; - ndopt_pi->nd_opt_pi_flags_reserved = 0; - if (pfx->onlinkflg) - ndopt_pi->nd_opt_pi_flags_reserved |= - ND_OPT_PI_FLAG_ONLINK; - if (pfx->autoconfflg) - ndopt_pi->nd_opt_pi_flags_reserved |= - ND_OPT_PI_FLAG_AUTO; - if (pfx->timer) - vltime = 0; - else { - if (pfx->vltimeexpire || pfx->pltimeexpire) - gettimeofday(&now, NULL); - if (pfx->vltimeexpire == 0) - vltime = pfx->validlifetime; - else - vltime = (pfx->vltimeexpire > now.tv_sec) ? - pfx->vltimeexpire - now.tv_sec : 0; - } - if (pfx->timer) - pltime = 0; - else { - if (pfx->pltimeexpire == 0) - pltime = pfx->preflifetime; - else - pltime = (pfx->pltimeexpire > now.tv_sec) ? - pfx->pltimeexpire - now.tv_sec : 0; - } - if (vltime < pltime) { - /* - * this can happen if vltime is decrement but pltime - * is not. - */ - pltime = vltime; - } - ndopt_pi->nd_opt_pi_valid_time = htonl(vltime); - ndopt_pi->nd_opt_pi_preferred_time = htonl(pltime); - ndopt_pi->nd_opt_pi_reserved2 = 0; - ndopt_pi->nd_opt_pi_prefix = pfx->prefix; - - buf += sizeof(struct nd_opt_prefix_info); - } - -#ifdef ROUTEINFO - for (rti = rainfo->route.next; rti != &rainfo->route; rti = rti->next) { - u_int8_t psize = (rti->prefixlen + 0x3f) >> 6; - - ndopt_rti = (struct nd_opt_route_info *)buf; - ndopt_rti->nd_opt_rti_type = ND_OPT_ROUTE_INFO; - ndopt_rti->nd_opt_rti_len = 1 + psize; - ndopt_rti->nd_opt_rti_prefixlen = rti->prefixlen; - ndopt_rti->nd_opt_rti_flags = 0xff & rti->rtpref; - ndopt_rti->nd_opt_rti_lifetime = htonl(rti->ltime); - memcpy(ndopt_rti + 1, &rti->prefix, psize * 8); - buf += sizeof(struct nd_opt_route_info) + psize * 8; - } -#endif - - return; -} - -static 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); -} |
