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-rw-r--r--usr.sbin/rtadvd/config.c639
1 files changed, 639 insertions, 0 deletions
diff --git a/usr.sbin/rtadvd/config.c b/usr.sbin/rtadvd/config.c
new file mode 100644
index 0000000..3055161
--- /dev/null
+++ b/usr.sbin/rtadvd/config.c
@@ -0,0 +1,639 @@
+/*
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/time.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 <netinet6/ip6.h>
+#include <netinet6/ip6_var.h>
+#include <netinet6/icmp6.h>
+
+#include <arpa/inet.h>
+
+#include <stdio.h>
+#include <syslog.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "rtadvd.h"
+#include "advcap.h"
+#include "timer.h"
+#include "if.h"
+#include "config.h"
+
+static void makeentry __P((char *, int, char *, int));
+static void make_packet __P((struct rainfo *));
+static void get_prefix __P((struct rainfo *));
+
+extern struct rainfo *ralist;
+
+void
+getconfig(intface)
+ char *intface;
+{
+ int stat, pfxs, i;
+ char tbuf[BUFSIZ];
+ struct rainfo *tmp;
+ long val;
+ char buf[BUFSIZ];
+ char *bp = buf;
+ char *addr;
+
+#define MUSTHAVE(var, cap) \
+ { \
+ int t; \
+ if ((t = agetnum(cap)) < 0) { \
+ fprintf(stderr, "rtadvd: need %s for interface %s\n", \
+ cap, intface); \
+ exit(1); \
+ } \
+ var = t; \
+ }
+#define MAYHAVE(var, cap, def) \
+ { \
+ if ((var = agetnum(cap)) < 0) \
+ var = def; \
+ }
+
+ 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",
+ __FUNCTION__, intface);
+ }
+
+ tmp = (struct rainfo *)malloc(sizeof(*ralist));
+ memset(tmp, 0, sizeof(*tmp));
+ tmp->prefix.next = tmp->prefix.prev = &tmp->prefix;
+
+ /* 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",
+ __FUNCTION__, 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",
+ __FUNCTION__, intface, IPV6_MMTU);
+ }
+
+ /*
+ * set router configuration variables.
+ */
+ MAYHAVE(val, "maxinterval", DEF_MAXRTRADVINTERVAL);
+ if (val < MIN_MAXINTERVAL || val > MAX_MAXINTERVAL) {
+ syslog(LOG_ERR,
+ "<%s> maxinterval must be between %d and %d",
+ __FUNCTION__, 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 must be between %d and %d",
+ __FUNCTION__,
+ MIN_MININTERVAL,
+ (tmp->maxinterval * 3) / 4);
+ exit(1);
+ }
+ tmp->mininterval = (u_int)val;
+
+ MAYHAVE(val, "chlim", DEF_ADVCURHOPLIMIT);
+ tmp->hoplimit = val & 0xff;
+
+ MAYHAVE(val, "raflags", 0);
+ tmp->managedflg= val & ND_RA_FLAG_MANAGED;
+ tmp->otherflg = val & ND_RA_FLAG_OTHER;
+
+ MAYHAVE(val, "rltime", tmp->maxinterval * 3);
+ if (val && (val < tmp->maxinterval || val > MAXROUTERLIFETIME)) {
+ syslog(LOG_ERR,
+ "<%s> router lifetime on %s must be 0 or"
+ " between %d and %d",
+ __FUNCTION__, intface,
+ tmp->maxinterval, MAXROUTERLIFETIME);
+ exit(1);
+ }
+ tmp->lifetime = val & 0xffff;
+
+ MAYHAVE(val, "rtime", DEF_ADVREACHABLETIME);
+ if (val > MAXREACHABLETIME) {
+ syslog(LOG_ERR,
+ "<%s> reachable time must be no greater than %d",
+ __FUNCTION__, MAXREACHABLETIME);
+ exit(1);
+ }
+ tmp->reachabletime = (u_int32_t)val;
+
+ MAYHAVE(val, "retrans", DEF_ADVRETRANSTIMER);
+ if (val < 0 || val > 0xffffffff) {
+ syslog(LOG_ERR,
+ "<%s> retrans time out of range", __FUNCTION__);
+ exit(1);
+ }
+ tmp->retranstimer = (u_int32_t)val;
+
+ /* prefix information */
+ if ((pfxs = agetnum("addrs")) < 0) {
+ /* auto configure prefix information */
+ if (agetstr("addr", &bp) || agetstr("addr1", &bp)) {
+ syslog(LOG_ERR,
+ "<%s> conflicting prefix configuration for %s: "
+ "automatic and manual config at the same time",
+ __FUNCTION__, intface);
+ exit(1);
+ }
+ get_prefix(tmp);
+ }
+ else {
+ tmp->pfxs = pfxs;
+ for (i = 0; i < pfxs; i++) {
+ struct prefix *pfx;
+ char entbuf[256];
+ int added = (pfxs > 1) ? 1 : 0;
+
+ /* allocate memory to store prefix information */
+ if ((pfx = malloc(sizeof(struct prefix))) == NULL) {
+ syslog(LOG_ERR,
+ "<%s> can't allocate enough memory",
+ __FUNCTION__);
+ exit(1);
+ }
+ /* link into chain */
+ insque(pfx, &tmp->prefix);
+
+ makeentry(entbuf, i, "prefixlen", added);
+ MAYHAVE(val, entbuf, 64);
+ if (val < 0 || val > 128) {
+ syslog(LOG_ERR,
+ "<%s> prefixlen out of range",
+ __FUNCTION__);
+ exit(1);
+ }
+ pfx->prefixlen = (int)val;
+
+ makeentry(entbuf, i, "pinfoflags", added);
+ 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, i, "vltime", added);
+ MAYHAVE(val, entbuf, DEF_ADVVALIDLIFETIME);
+ if (val < 0 || val > 0xffffffff) {
+ syslog(LOG_ERR,
+ "<%s> vltime out of range",
+ __FUNCTION__);
+ exit(1);
+ }
+ pfx->validlifetime = (u_int32_t)val;
+
+ makeentry(entbuf, i, "pltime", added);
+ MAYHAVE(val, entbuf, DEF_ADVPREFERREDLIFETIME);
+ if (val < 0 || val > 0xffffffff) {
+ syslog(LOG_ERR,
+ "<%s> pltime out of range",
+ __FUNCTION__);
+ exit(1);
+ }
+ pfx->preflifetime = (u_int32_t)val;
+
+ makeentry(entbuf, i, "addr", added);
+ addr = (char *)agetstr(entbuf, &bp);
+ if (addr == NULL) {
+ syslog(LOG_ERR,
+ "<%s> need %s as an prefix for "
+ "interface %s",
+ __FUNCTION__, entbuf, intface);
+ exit(1);
+ }
+ if (inet_pton(AF_INET6, addr,
+ &pfx->prefix) != 1) {
+ syslog(LOG_ERR,
+ "<%s> inet_pton failed for %s",
+ __FUNCTION__, addr);
+ exit(1);
+ }
+ if (IN6_IS_ADDR_MULTICAST(&pfx->prefix)) {
+ syslog(LOG_ERR,
+ "<%s> multicast prefix(%s) must "
+ "not be advertised (IF=%s)",
+ __FUNCTION__, addr, intface);
+ exit(1);
+ }
+ if (IN6_IS_ADDR_LINKLOCAL(&pfx->prefix))
+ syslog(LOG_NOTICE,
+ "<%s> link-local prefix(%s) will be"
+ " advertised on %s",
+ __FUNCTION__, addr, intface);
+ }
+ }
+
+ MAYHAVE(val, "mtu", 0);
+ if (val < 0 || val > 0xffffffff) {
+ syslog(LOG_ERR,
+ "<%s> mtu out of range", __FUNCTION__);
+ 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 must be between"
+ " least MTU and physical link MTU",
+ __FUNCTION__);
+ exit(1);
+ }
+
+ /* 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);
+}
+
+static void
+get_prefix(struct rainfo *rai)
+{
+ size_t len;
+ u_char *buf, *lim, *next;
+ u_char ntopbuf[INET6_ADDRSTRLEN];
+
+ if ((len = rtbuf_len()) < 0) {
+ syslog(LOG_ERR,
+ "<%s> can't get buffer length for routing info",
+ __FUNCTION__);
+ exit(1);
+ }
+ if ((buf = malloc(len)) == NULL) {
+ syslog(LOG_ERR,
+ "<%s> can't allocate buffer", __FUNCTION__);
+ exit(1);
+ }
+ if (get_rtinfo(buf, &len) < 0) {
+ syslog(LOG_ERR,
+ "<%s> can't get routing inforamtion", __FUNCTION__);
+ exit(1);
+ }
+
+ lim = buf + len;
+ next = get_next_msg(buf, lim, rai->ifindex, &len,
+ RTADV_TYPE2BITMASK(RTM_GET));
+ while (next < lim) {
+ struct prefix *pp;
+ struct in6_addr *a;
+
+ /* allocate memory to store prefix info. */
+ if ((pp = malloc(sizeof(*pp))) == NULL) {
+ syslog(LOG_ERR,
+ "<%s> can't get allocate buffer for prefix",
+ __FUNCTION__);
+ exit(1);
+ }
+ memset(pp, 0, sizeof(*pp));
+
+ /* set prefix and its length */
+ a = get_addr(next);
+ memcpy(&pp->prefix, a, sizeof(*a));
+ if ((pp->prefixlen = get_prefixlen(next)) < 0) {
+ syslog(LOG_ERR,
+ "<%s> failed to get prefixlen "
+ "or prefixl is invalid",
+ __FUNCTION__);
+ exit(1);
+ }
+ syslog(LOG_DEBUG,
+ "<%s> add %s/%d to prefix list on %s",
+ __FUNCTION__,
+ inet_ntop(AF_INET6, a, ntopbuf, INET6_ADDRSTRLEN),
+ pp->prefixlen, rai->ifname);
+
+ /* set other fields with protocol defaults */
+ pp->validlifetime = DEF_ADVVALIDLIFETIME;
+ pp->preflifetime = DEF_ADVPREFERREDLIFETIME;
+ pp->onlinkflg = 1;
+ pp->autoconfflg = 1;
+
+ /* link into chain */
+ insque(pp, &rai->prefix);
+
+ /* counter increment */
+ rai->pfxs++;
+
+ /* forward pointer and get next prefix(if any) */
+ next += len;
+ next = get_next_msg(next, lim, rai->ifindex,
+ &len, RTADV_TYPE2BITMASK(RTM_GET));
+ }
+
+ free(buf);
+}
+
+static void
+makeentry(buf, id, string, add)
+ char *buf, *string;
+ int id, add;
+{
+ strcpy(buf, string);
+ if (add) {
+ char *cp;
+
+ cp = (char *)index(buf, '\0');
+ cp += sprintf(cp, "%d", id);
+ *cp = '\0';
+ }
+}
+
+/*
+ * Add a prefix to the list of specified interface and reconstruct
+ * the outgoing packet.
+ * The prefix must not be in the list.
+ * XXX: other parameter of the prefix(e.g. lifetime) shoule 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",
+ __FUNCTION__);
+ return; /* XXX: error or exit? */
+ }
+ 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;
+
+ insque(prefix, &rai->prefix);
+
+ syslog(LOG_DEBUG, "<%s> new prefix %s/%d was added on %s",
+ __FUNCTION__, 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 = 0;
+
+ /* reconstruct the packet */
+ rai->pfxs++;
+ make_packet(rai);
+
+ /*
+ * reset the timer so that the new prefix will be advertised quickly.
+ */
+ rai->initcounter = 0;
+ ra_timer_update((void *)rai, &rai->timer->tm);
+ rtadvd_set_timer(&rai->timer->tm, rai->timer);
+}
+
+/*
+ * 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 rainfo *rai, struct prefix *prefix)
+{
+ u_char ntopbuf[INET6_ADDRSTRLEN];
+
+ remque(prefix);
+ syslog(LOG_DEBUG, "<%s> prefix %s/%d was deleted on %s",
+ __FUNCTION__, inet_ntop(AF_INET6, &prefix->prefix,
+ ntopbuf, INET6_ADDRSTRLEN),
+ prefix->prefixlen, rai->ifname);
+ free(prefix);
+ rai->pfxs--;
+ make_packet(rai);
+}
+
+/*
+ * 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)
+{
+ int s;
+
+ if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
+ syslog(LOG_ERR, "<%s> socket: %s", __FUNCTION__,
+ strerror(errno));
+ exit(1);
+ }
+
+ if (ioctl(s, SIOCGIFPREFIX_IN6, (caddr_t)ipr) < 0) {
+ syslog(LOG_INFO, "<%s> ioctl:SIOCGIFPREFIX %s", __FUNCTION__,
+ 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", __FUNCTION__,
+ inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
+ sizeof(ntopbuf)), ipr->ipr_origin);
+ return 1;
+ }
+
+ close(s);
+ return 0;
+}
+
+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", __FUNCTION__,
+ 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);
+}
+
+static 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;
+ 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.",
+ __FUNCTION__, 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);
+
+ /* allocate memory for the packet */
+ if ((buf = malloc(packlen)) == NULL) {
+ syslog(LOG_ERR,
+ "<%s> can't get enough memory for an RA packet",
+ __FUNCTION__);
+ exit(1);
+ }
+ 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;
+ 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 = ntohl(rainfo->linkmtu);
+ buf += sizeof(struct nd_opt_mtu);
+ }
+
+ for (pfx = rainfo->prefix.next;
+ pfx != &rainfo->prefix; pfx = pfx->next) {
+ 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;
+ ndopt_pi->nd_opt_pi_valid_time = ntohl(pfx->validlifetime);
+ ndopt_pi->nd_opt_pi_preferred_time =
+ ntohl(pfx->preflifetime);
+ ndopt_pi->nd_opt_pi_reserved2 = 0;
+ ndopt_pi->nd_opt_pi_prefix = pfx->prefix;
+
+ buf += sizeof(struct nd_opt_prefix_info);
+ }
+
+ return;
+}
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