diff options
Diffstat (limited to 'zebra/rtadv.c')
| -rw-r--r-- | zebra/rtadv.c | 1112 |
1 files changed, 1112 insertions, 0 deletions
diff --git a/zebra/rtadv.c b/zebra/rtadv.c new file mode 100644 index 000000000..8f4b37780 --- /dev/null +++ b/zebra/rtadv.c @@ -0,0 +1,1112 @@ +/* Router advertisement + * Copyright (C) 1999 Kunihiro Ishiguro + * + * This file is part of GNU Zebra. + * + * GNU Zebra is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * GNU Zebra is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Zebra; see the file COPYING. If not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#include <zebra.h> + +#include "memory.h" +#include "sockopt.h" +#include "thread.h" +#include "if.h" +#include "log.h" +#include "prefix.h" +#include "linklist.h" +#include "command.h" + +#include "zebra/interface.h" +#include "zebra/rtadv.h" +#include "zebra/debug.h" + +#if defined (HAVE_IPV6) && defined (RTADV) + +/* If RFC2133 definition is used. */ +#ifndef IPV6_JOIN_GROUP +#define IPV6_JOIN_GROUP IPV6_ADD_MEMBERSHIP +#endif +#ifndef IPV6_LEAVE_GROUP +#define IPV6_LEAVE_GROUP IPV6_DROP_MEMBERSHIP +#endif + +#define ALLNODE "ff02::1" +#define ALLROUTER "ff02::2" + +enum rtadv_event {RTADV_START, RTADV_STOP, RTADV_TIMER, RTADV_READ}; + +void rtadv_event (enum rtadv_event, int); + +int if_join_all_router (int, struct interface *); +int if_leave_all_router (int, struct interface *); + +/* Structure which hold status of router advertisement. */ +struct rtadv +{ + int sock; + + int adv_if_count; + + struct thread *ra_read; + struct thread *ra_timer; +}; + +struct rtadv *rtadv = NULL; + +struct rtadv * +rtadv_new () +{ + struct rtadv *new; + new = XMALLOC (MTYPE_TMP, sizeof (struct rtadv)); + memset (new, 0, sizeof (struct rtadv)); + return new; +} + +void +rtadv_free (struct rtadv *rtadv) +{ + XFREE (MTYPE_TMP, rtadv); +} + +int +rtadv_recv_packet (int sock, u_char *buf, int buflen, + struct sockaddr_in6 *from, unsigned int *ifindex, + int *hoplimit) +{ + int ret; + struct msghdr msg; + struct iovec iov; + struct cmsghdr *cmsgptr; + struct in6_addr dst; + + char adata[1024]; + + /* Fill in message and iovec. */ + msg.msg_name = (void *) from; + msg.msg_namelen = sizeof (struct sockaddr_in6); + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = (void *) adata; + msg.msg_controllen = sizeof adata; + iov.iov_base = buf; + iov.iov_len = buflen; + + /* If recvmsg fail return minus value. */ + ret = recvmsg (sock, &msg, 0); + if (ret < 0) + return ret; + + for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL; + cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) + { + /* I want interface index which this packet comes from. */ + if (cmsgptr->cmsg_level == IPPROTO_IPV6 && + cmsgptr->cmsg_type == IPV6_PKTINFO) + { + struct in6_pktinfo *ptr; + + ptr = (struct in6_pktinfo *) CMSG_DATA (cmsgptr); + *ifindex = ptr->ipi6_ifindex; + memcpy(&dst, &ptr->ipi6_addr, sizeof(ptr->ipi6_addr)); + } + + /* Incoming packet's hop limit. */ + if (cmsgptr->cmsg_level == IPPROTO_IPV6 && + cmsgptr->cmsg_type == IPV6_HOPLIMIT) + *hoplimit = *((int *) CMSG_DATA (cmsgptr)); + } + return ret; +} + +#define RTADV_MSG_SIZE 4096 + +/* Send router advertisement packet. */ +void +rtadv_send_packet (int sock, struct interface *ifp) +{ + struct msghdr msg; + struct iovec iov; + struct cmsghdr *cmsgptr; + struct in6_pktinfo *pkt; + struct sockaddr_in6 addr; +#if HAVE_SOCKADDR_DL + struct sockaddr_dl *sdl; +#endif /* HAVE_SOCKADDR_DL */ + char adata [sizeof (struct cmsghdr) + sizeof (struct in6_pktinfo)]; + unsigned char buf[RTADV_MSG_SIZE]; + struct nd_router_advert *rtadv; + int ret; + int len = 0; + struct zebra_if *zif; + u_char all_nodes_addr[] = {0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,1}; + listnode node; + + /* Logging of packet. */ + if (IS_ZEBRA_DEBUG_PACKET) + zlog_info ("Router advertisement send to %s", ifp->name); + + /* Fill in sockaddr_in6. */ + memset (&addr, 0, sizeof (struct sockaddr_in6)); + addr.sin6_family = AF_INET6; +#ifdef SIN6_LEN + addr.sin6_len = sizeof (struct sockaddr_in6); +#endif /* SIN6_LEN */ + addr.sin6_port = htons (IPPROTO_ICMPV6); + memcpy (&addr.sin6_addr, all_nodes_addr, sizeof (struct in6_addr)); + + /* Fetch interface information. */ + zif = ifp->info; + + /* Make router advertisement message. */ + rtadv = (struct nd_router_advert *) buf; + + rtadv->nd_ra_type = ND_ROUTER_ADVERT; + rtadv->nd_ra_code = 0; + rtadv->nd_ra_cksum = 0; + + rtadv->nd_ra_curhoplimit = 64; + rtadv->nd_ra_flags_reserved = 0; + if (zif->rtadv.AdvManagedFlag) + rtadv->nd_ra_flags_reserved |= ND_RA_FLAG_MANAGED; + if (zif->rtadv.AdvOtherConfigFlag) + rtadv->nd_ra_flags_reserved |= ND_RA_FLAG_OTHER; + rtadv->nd_ra_router_lifetime = htons (zif->rtadv.AdvDefaultLifetime); + rtadv->nd_ra_reachable = htonl (zif->rtadv.AdvReachableTime); + rtadv->nd_ra_retransmit = htonl (0); + + len = sizeof (struct nd_router_advert); + + /* Fill in prefix. */ + for (node = listhead (zif->rtadv.AdvPrefixList); node; node = nextnode (node)) + { + struct nd_opt_prefix_info *pinfo; + struct rtadv_prefix *rprefix; + + rprefix = getdata (node); + + pinfo = (struct nd_opt_prefix_info *) (buf + len); + + pinfo->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION; + pinfo->nd_opt_pi_len = 4; + pinfo->nd_opt_pi_prefix_len = rprefix->prefix.prefixlen; + + pinfo->nd_opt_pi_flags_reserved = 0; + if (rprefix->AdvOnLinkFlag) + pinfo->nd_opt_pi_flags_reserved |= ND_OPT_PI_FLAG_ONLINK; + if (rprefix->AdvAutonomousFlag) + pinfo->nd_opt_pi_flags_reserved |= ND_OPT_PI_FLAG_AUTO; + + pinfo->nd_opt_pi_valid_time = htonl (rprefix->AdvValidLifetime); + pinfo->nd_opt_pi_preferred_time = htonl (rprefix->AdvPreferredLifetime); + pinfo->nd_opt_pi_reserved2 = 0; + + memcpy (&pinfo->nd_opt_pi_prefix, &rprefix->prefix.u.prefix6, + sizeof (struct in6_addr)); + +#ifdef DEBUG + { + u_char buf[INET6_ADDRSTRLEN]; + + zlog_info ("DEBUG %s", inet_ntop (AF_INET6, &pinfo->nd_opt_pi_prefix, buf, INET6_ADDRSTRLEN)); + + } +#endif /* DEBUG */ + + len += sizeof (struct nd_opt_prefix_info); + } + + /* Hardware address. */ +#ifdef HAVE_SOCKADDR_DL + sdl = &ifp->sdl; + if (sdl != NULL && sdl->sdl_alen != 0) + { + buf[len++] = ND_OPT_SOURCE_LINKADDR; + buf[len++] = (sdl->sdl_alen + 2) >> 3; + + memcpy (buf + len, LLADDR (sdl), sdl->sdl_alen); + len += sdl->sdl_alen; + } +#else + if (ifp->hw_addr_len != 0) + { + buf[len++] = ND_OPT_SOURCE_LINKADDR; + buf[len++] = (ifp->hw_addr_len + 2) >> 3; + + memcpy (buf + len, ifp->hw_addr, ifp->hw_addr_len); + len += ifp->hw_addr_len; + } +#endif /* HAVE_SOCKADDR_DL */ + + msg.msg_name = (void *) &addr; + msg.msg_namelen = sizeof (struct sockaddr_in6); + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = (void *) adata; + msg.msg_controllen = sizeof adata; + iov.iov_base = buf; + iov.iov_len = len; + + cmsgptr = (struct cmsghdr *)adata; + cmsgptr->cmsg_len = sizeof adata; + cmsgptr->cmsg_level = IPPROTO_IPV6; + cmsgptr->cmsg_type = IPV6_PKTINFO; + pkt = (struct in6_pktinfo *) CMSG_DATA (cmsgptr); + memset (&pkt->ipi6_addr, 0, sizeof (struct in6_addr)); + pkt->ipi6_ifindex = ifp->ifindex; + + ret = sendmsg (sock, &msg, 0); + if (ret <0) + perror ("sendmsg"); +} + +int +rtadv_timer (struct thread *thread) +{ + listnode node; + struct interface *ifp; + struct zebra_if *zif; + + rtadv->ra_timer = NULL; + rtadv_event (RTADV_TIMER, 1); + + for (node = listhead (iflist); node; nextnode (node)) + { + ifp = getdata (node); + + if (if_is_loopback (ifp)) + continue; + + zif = ifp->info; + + if (zif->rtadv.AdvSendAdvertisements) + if (--zif->rtadv.AdvIntervalTimer <= 0) + { + zif->rtadv.AdvIntervalTimer = zif->rtadv.MaxRtrAdvInterval; + rtadv_send_packet (rtadv->sock, ifp); + } + } + return 0; +} + +void +rtadv_process_solicit (struct interface *ifp) +{ + zlog_info ("Router solicitation received on %s", ifp->name); + + rtadv_send_packet (rtadv->sock, ifp); +} + +void +rtadv_process_advert () +{ + zlog_info ("Router advertisement received"); +} + +void +rtadv_process_packet (u_char *buf, int len, unsigned int ifindex, int hoplimit) +{ + struct icmp6_hdr *icmph; + struct interface *ifp; + struct zebra_if *zif; + + /* Interface search. */ + ifp = if_lookup_by_index (ifindex); + if (ifp == NULL) + { + zlog_warn ("Unknown interface index: %d", ifindex); + return; + } + + if (if_is_loopback (ifp)) + return; + + /* Check interface configuration. */ + zif = ifp->info; + if (! zif->rtadv.AdvSendAdvertisements) + return; + + /* ICMP message length check. */ + if (len < sizeof (struct icmp6_hdr)) + { + zlog_warn ("Invalid ICMPV6 packet length: %d", len); + return; + } + + icmph = (struct icmp6_hdr *) buf; + + /* ICMP message type check. */ + if (icmph->icmp6_type != ND_ROUTER_SOLICIT && + icmph->icmp6_type != ND_ROUTER_ADVERT) + { + zlog_warn ("Unwanted ICMPV6 message type: %d", icmph->icmp6_type); + return; + } + + /* Hoplimit check. */ + if (hoplimit >= 0 && hoplimit != 255) + { + zlog_warn ("Invalid hoplimit %d for router advertisement ICMP packet", + hoplimit); + return; + } + + /* Check ICMP message type. */ + if (icmph->icmp6_type == ND_ROUTER_SOLICIT) + rtadv_process_solicit (ifp); + else if (icmph->icmp6_type == ND_ROUTER_ADVERT) + rtadv_process_advert (); + + return; +} + +int +rtadv_read (struct thread *thread) +{ + int sock; + int len; + u_char buf[RTADV_MSG_SIZE]; + struct sockaddr_in6 from; + unsigned int ifindex; + int hoplimit = -1; + + sock = THREAD_FD (thread); + rtadv->ra_read = NULL; + + /* Register myself. */ + rtadv_event (RTADV_READ, sock); + + len = rtadv_recv_packet (sock, buf, BUFSIZ, &from, &ifindex, &hoplimit); + + if (len < 0) + { + zlog_warn ("router solicitation recv failed: %s.", strerror (errno)); + return len; + } + + rtadv_process_packet (buf, len, ifindex, hoplimit); + + return 0; +} + +int +rtadv_make_socket (void) +{ + int sock; + int ret; + struct icmp6_filter filter; + + sock = socket (AF_INET6, SOCK_RAW, IPPROTO_ICMPV6); + + /* When we can't make ICMPV6 socket simply back. Router + advertisement feature will not be supported. */ + if (sock < 0) + return -1; + + ret = setsockopt_ipv6_pktinfo (sock, 1); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_checksum (sock, 2); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_multicast_loop (sock, 0); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_unicast_hops (sock, 255); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_multicast_hops (sock, 255); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_hoplimit (sock, 1); + if (ret < 0) + return ret; + + ICMP6_FILTER_SETBLOCKALL(&filter); + ICMP6_FILTER_SETPASS (ND_ROUTER_SOLICIT, &filter); + ICMP6_FILTER_SETPASS (ND_ROUTER_ADVERT, &filter); + + ret = setsockopt (sock, IPPROTO_ICMPV6, ICMP6_FILTER, &filter, + sizeof (struct icmp6_filter)); + if (ret < 0) + { + zlog_info ("ICMP6_FILTER set fail: %s", strerror (errno)); + return ret; + } + + return sock; +} + +struct rtadv_prefix * +rtadv_prefix_new () +{ + struct rtadv_prefix *new; + + new = XMALLOC (MTYPE_RTADV_PREFIX, sizeof (struct rtadv_prefix)); + memset (new, 0, sizeof (struct rtadv_prefix)); + + return new; +} + +void +rtadv_prefix_free (struct rtadv_prefix *rtadv_prefix) +{ + XFREE (MTYPE_RTADV_PREFIX, rtadv_prefix); +} + +struct rtadv_prefix * +rtadv_prefix_lookup (list rplist, struct prefix *p) +{ + listnode node; + struct rtadv_prefix *rprefix; + + for (node = listhead (rplist); node; node = nextnode (node)) + { + rprefix = getdata (node); + if (prefix_same (&rprefix->prefix, p)) + return rprefix; + } + return NULL; +} + +struct rtadv_prefix * +rtadv_prefix_get (list rplist, struct prefix *p) +{ + struct rtadv_prefix *rprefix; + + rprefix = rtadv_prefix_lookup (rplist, p); + if (rprefix) + return rprefix; + + rprefix = rtadv_prefix_new (); + memcpy (&rprefix->prefix, p, sizeof (struct prefix)); + listnode_add (rplist, rprefix); + + return rprefix; +} + +void +rtadv_prefix_set (struct zebra_if *zif, struct rtadv_prefix *rp) +{ + struct rtadv_prefix *rprefix; + + rprefix = rtadv_prefix_get (zif->rtadv.AdvPrefixList, &rp->prefix); + + /* Set parameters. */ + rprefix->AdvValidLifetime = rp->AdvValidLifetime; + rprefix->AdvPreferredLifetime = rp->AdvPreferredLifetime; + rprefix->AdvOnLinkFlag = rp->AdvOnLinkFlag; + rprefix->AdvAutonomousFlag = rp->AdvAutonomousFlag; +} + +int +rtadv_prefix_reset (struct zebra_if *zif, struct rtadv_prefix *rp) +{ + struct rtadv_prefix *rprefix; + + rprefix = rtadv_prefix_lookup (zif->rtadv.AdvPrefixList, &rp->prefix); + if (rprefix != NULL) + { + listnode_delete (zif->rtadv.AdvPrefixList, (void *) rprefix); + rtadv_prefix_free (rprefix); + return 1; + } + else + return 0; +} + +DEFUN (ipv6_nd_suppress_ra, + ipv6_nd_suppress_ra_cmd, + "ipv6 nd suppress-ra", + IP_STR + "Neighbor discovery\n" + "Suppress Router Advertisement\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = vty->index; + zif = ifp->info; + + if (if_is_loopback (ifp)) + { + vty_out (vty, "Invalid interface%s", VTY_NEWLINE); + return CMD_WARNING; + } + + if (zif->rtadv.AdvSendAdvertisements) + { + zif->rtadv.AdvSendAdvertisements = 0; + zif->rtadv.AdvIntervalTimer = 0; + rtadv->adv_if_count--; + + if_leave_all_router (rtadv->sock, ifp); + + if (rtadv->adv_if_count == 0) + rtadv_event (RTADV_STOP, 0); + } + + return CMD_SUCCESS; +} + +ALIAS (ipv6_nd_suppress_ra, + no_ipv6_nd_send_ra_cmd, + "no ipv6 nd send-ra", + NO_STR + IP_STR + "Neighbor discovery\n" + "Send Router Advertisement\n") + +DEFUN (no_ipv6_nd_suppress_ra, + no_ipv6_nd_suppress_ra_cmd, + "no ipv6 nd suppress-ra", + NO_STR + IP_STR + "Neighbor discovery\n" + "Suppress Router Advertisement\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = vty->index; + zif = ifp->info; + + if (if_is_loopback (ifp)) + { + vty_out (vty, "Invalid interface%s", VTY_NEWLINE); + return CMD_WARNING; + } + + if (! zif->rtadv.AdvSendAdvertisements) + { + zif->rtadv.AdvSendAdvertisements = 1; + zif->rtadv.AdvIntervalTimer = 0; + rtadv->adv_if_count++; + + if_join_all_router (rtadv->sock, ifp); + + if (rtadv->adv_if_count == 1) + rtadv_event (RTADV_START, rtadv->sock); + } + + return CMD_SUCCESS; +} + +ALIAS (no_ipv6_nd_suppress_ra, + ipv6_nd_send_ra_cmd, + "ipv6 nd send-ra", + IP_STR + "Neighbor discovery\n" + "Send Router Advertisement\n") + +DEFUN (ipv6_nd_ra_interval, + ipv6_nd_ra_interval_cmd, + "ipv6 nd ra-interval SECONDS", + IP_STR + "Neighbor discovery\n" + "Router Advertisement interval\n" + "Router Advertisement interval in seconds\n") +{ + int interval; + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + interval = atoi (argv[0]); + + if (interval < 0) + { + vty_out (vty, "Invalid Router Advertisement Interval%s", VTY_NEWLINE); + return CMD_WARNING; + } + + zif->rtadv.MaxRtrAdvInterval = interval; + zif->rtadv.MinRtrAdvInterval = 0.33 * interval; + zif->rtadv.AdvIntervalTimer = 0; + + return CMD_SUCCESS; +} + +DEFUN (no_ipv6_nd_ra_interval, + no_ipv6_nd_ra_interval_cmd, + "no ipv6 nd ra-interval", + NO_STR + IP_STR + "Neighbor discovery\n" + "Router Advertisement interval\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + zif->rtadv.MaxRtrAdvInterval = RTADV_MAX_RTR_ADV_INTERVAL; + zif->rtadv.MinRtrAdvInterval = RTADV_MIN_RTR_ADV_INTERVAL; + zif->rtadv.AdvIntervalTimer = zif->rtadv.MaxRtrAdvInterval; + + return CMD_SUCCESS; +} + +DEFUN (ipv6_nd_ra_lifetime, + ipv6_nd_ra_lifetime_cmd, + "ipv6 nd ra-lifetime SECONDS", + IP_STR + "Neighbor discovery\n" + "Router lifetime\n" + "Router lifetime in seconds\n") +{ + int lifetime; + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + lifetime = atoi (argv[0]); + + if (lifetime < 0 || lifetime > 0xffff) + { + vty_out (vty, "Invalid Router Lifetime%s", VTY_NEWLINE); + return CMD_WARNING; + } + + zif->rtadv.AdvDefaultLifetime = lifetime; + + return CMD_SUCCESS; +} + +DEFUN (no_ipv6_nd_ra_lifetime, + no_ipv6_nd_ra_lifetime_cmd, + "no ipv6 nd ra-lifetime", + NO_STR + IP_STR + "Neighbor discovery\n" + "Router lifetime\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + zif->rtadv.AdvDefaultLifetime = RTADV_ADV_DEFAULT_LIFETIME; + + return CMD_SUCCESS; +} + +DEFUN (ipv6_nd_reachable_time, + ipv6_nd_reachable_time_cmd, + "ipv6 nd reachable-time MILLISECONDS", + IP_STR + "Neighbor discovery\n" + "Reachable time\n" + "Reachable time in milliseconds\n") +{ + u_int32_t rtime; + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + rtime = (u_int32_t) atol (argv[0]); + + if (rtime > RTADV_MAX_REACHABLE_TIME) + { + vty_out (vty, "Invalid Reachable time%s", VTY_NEWLINE); + return CMD_WARNING; + } + + zif->rtadv.AdvReachableTime = rtime; + + return CMD_SUCCESS; +} + +DEFUN (no_ipv6_nd_reachable_time, + no_ipv6_nd_reachable_time_cmd, + "no ipv6 nd reachable-time", + NO_STR + IP_STR + "Neighbor discovery\n" + "Reachable time\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + zif->rtadv.AdvReachableTime = 0; + + return CMD_SUCCESS; +} + +DEFUN (ipv6_nd_managed_config_flag, + ipv6_nd_managed_config_flag_cmd, + "ipv6 nd managed-config-flag", + IP_STR + "Neighbor discovery\n" + "Managed address configuration flag\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + zif->rtadv.AdvManagedFlag = 1; + + return CMD_SUCCESS; +} + +DEFUN (no_ipv6_nd_managed_config_flag, + no_ipv6_nd_managed_config_flag_cmd, + "no ipv6 nd managed-config-flag", + NO_STR + IP_STR + "Neighbor discovery\n" + "Managed address configuration flag\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + zif->rtadv.AdvManagedFlag = 0; + + return CMD_SUCCESS; +} + +DEFUN (ipv6_nd_other_config_flag, + ipv6_nd_other_config_flag_cmd, + "ipv6 nd other-config-flag", + IP_STR + "Neighbor discovery\n" + "Other statefull configuration flag\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + zif->rtadv.AdvOtherConfigFlag = 1; + + return CMD_SUCCESS; +} + +DEFUN (no_ipv6_nd_other_config_flag, + no_ipv6_nd_other_config_flag_cmd, + "no ipv6 nd other-config-flag", + NO_STR + IP_STR + "Neighbor discovery\n" + "Other statefull configuration flag\n") +{ + struct interface *ifp; + struct zebra_if *zif; + + ifp = (struct interface *) vty->index; + zif = ifp->info; + + zif->rtadv.AdvOtherConfigFlag = 0; + + return CMD_SUCCESS; +} + +DEFUN (ipv6_nd_prefix_advertisement, + ipv6_nd_prefix_advertisement_cmd, + "ipv6 nd prefix-advertisement IPV6PREFIX VALID PREFERRED [onlink] [autoconfig]", + IP_STR + "Neighbor discovery\n" + "Prefix information\n" + "IPv6 prefix\n" + "Valid lifetime in seconds\n" + "Preferred lifetime in seconds\n" + "On link flag\n" + "Autonomous address-configuration flag\n") +{ + int i; + int ret; + struct interface *ifp; + struct zebra_if *zebra_if; + struct rtadv_prefix rp; + + ifp = (struct interface *) vty->index; + zebra_if = ifp->info; + + ret = str2prefix_ipv6 (argv[0], (struct prefix_ipv6 *) &rp.prefix); + if (!ret) + { + vty_out (vty, "Malformed IPv6 prefix%s", VTY_NEWLINE); + return CMD_WARNING; + } + + if (argc == 1) + { + rp.AdvValidLifetime = RTADV_VALID_LIFETIME; + rp.AdvPreferredLifetime = RTADV_PREFERRED_LIFETIME; + rp.AdvOnLinkFlag = 1; + rp.AdvAutonomousFlag = 1; + } + else + { + rp.AdvValidLifetime = (u_int32_t) atol (argv[1]); + rp.AdvPreferredLifetime = (u_int32_t) atol (argv[2]); + if (rp.AdvPreferredLifetime > rp.AdvValidLifetime) + { + vty_out (vty, "Invalid preferred lifetime%s", VTY_NEWLINE); + return CMD_WARNING; + } + + rp.AdvOnLinkFlag = 0; + rp.AdvAutonomousFlag = 0; + for (i = 3; i < argc; i++) + { + if (! strcmp (argv[i], "onlink")) + rp.AdvOnLinkFlag = 1; + else if (! strcmp (argv[i], "autoconfig")) + rp.AdvAutonomousFlag = 1; + } + } + + rtadv_prefix_set (zebra_if, &rp); + + return CMD_SUCCESS; +} + +ALIAS (ipv6_nd_prefix_advertisement, + ipv6_nd_prefix_advertisement_no_val_cmd, + "ipv6 nd prefix-advertisement IPV6PREFIX", + IP_STR + "Neighbor discovery\n" + "Prefix information\n" + "IPv6 prefix\n") + +DEFUN (no_ipv6_nd_prefix_advertisement, + no_ipv6_nd_prefix_advertisement_cmd, + "no ipv6 nd prefix-advertisement IPV6PREFIX", + NO_STR + IP_STR + "Neighbor discovery\n" + "Prefix information\n" + "IPv6 prefix\n") +{ + int ret; + struct interface *ifp; + struct zebra_if *zebra_if; + struct rtadv_prefix rp; + + ifp = (struct interface *) vty->index; + zebra_if = ifp->info; + + ret = str2prefix_ipv6 (argv[0], (struct prefix_ipv6 *) &rp.prefix); + if (!ret) + { + vty_out (vty, "Malformed IPv6 prefix%s", VTY_NEWLINE); + return CMD_WARNING; + } + + ret = rtadv_prefix_reset (zebra_if, &rp); + if (!ret) + { + vty_out (vty, "Non-exist IPv6 prefix%s", VTY_NEWLINE); + return CMD_WARNING; + } + + return CMD_SUCCESS; +} + +/* Write configuration about router advertisement. */ +void +rtadv_config_write (struct vty *vty, struct interface *ifp) +{ + struct zebra_if *zif; + listnode node; + struct rtadv_prefix *rprefix; + u_char buf[INET6_ADDRSTRLEN]; + + if (! rtadv) + return; + + zif = ifp->info; + + if (! if_is_loopback (ifp)) + { + if (zif->rtadv.AdvSendAdvertisements) + vty_out (vty, " no ipv6 nd suppress-ra%s", VTY_NEWLINE); + else + vty_out (vty, " ipv6 nd suppress-ra%s", VTY_NEWLINE); + } + + if (zif->rtadv.MaxRtrAdvInterval != RTADV_MAX_RTR_ADV_INTERVAL) + vty_out (vty, " ipv6 nd ra-interval %d%s", zif->rtadv.MaxRtrAdvInterval, + VTY_NEWLINE); + + if (zif->rtadv.AdvDefaultLifetime != RTADV_ADV_DEFAULT_LIFETIME) + vty_out (vty, " ipv6 nd ra-lifetime %d%s", zif->rtadv.AdvDefaultLifetime, + VTY_NEWLINE); + + if (zif->rtadv.AdvReachableTime) + vty_out (vty, " ipv6 nd reachable-time %d%s", zif->rtadv.AdvReachableTime, + VTY_NEWLINE); + + if (zif->rtadv.AdvManagedFlag) + vty_out (vty, " ipv6 nd managed-config-flag%s", VTY_NEWLINE); + + if (zif->rtadv.AdvOtherConfigFlag) + vty_out (vty, " ipv6 nd other-config-flag%s", VTY_NEWLINE); + + for (node = listhead(zif->rtadv.AdvPrefixList); node; node = nextnode (node)) + { + rprefix = getdata (node); + vty_out (vty, " ipv6 nd prefix-advertisement %s/%d %d %d", + inet_ntop (AF_INET6, &rprefix->prefix.u.prefix6, + buf, INET6_ADDRSTRLEN), + rprefix->prefix.prefixlen, + rprefix->AdvValidLifetime, + rprefix->AdvPreferredLifetime); + if (rprefix->AdvOnLinkFlag) + vty_out (vty, " onlink"); + if (rprefix->AdvAutonomousFlag) + vty_out (vty, " autoconfig"); + vty_out (vty, "%s", VTY_NEWLINE); + } +} + +extern struct thread_master *master; + +void +rtadv_event (enum rtadv_event event, int val) +{ + switch (event) + { + case RTADV_START: + if (! rtadv->ra_read) + rtadv->ra_read = thread_add_read (master, rtadv_read, NULL, val); + if (! rtadv->ra_timer) + rtadv->ra_timer = thread_add_event (master, rtadv_timer, NULL, 0); + break; + case RTADV_STOP: + if (rtadv->ra_timer) + { + thread_cancel (rtadv->ra_timer); + rtadv->ra_timer = NULL; + } + if (rtadv->ra_read) + { + thread_cancel (rtadv->ra_read); + rtadv->ra_read = NULL; + } + break; + case RTADV_TIMER: + if (! rtadv->ra_timer) + rtadv->ra_timer = thread_add_timer (master, rtadv_timer, NULL, val); + break; + case RTADV_READ: + if (! rtadv->ra_read) + rtadv->ra_read = thread_add_read (master, rtadv_read, NULL, val); + break; + default: + break; + } + return; +} + +void +rtadv_init () +{ + int sock; + + sock = rtadv_make_socket (); + if (sock < 0) + return; + + rtadv = rtadv_new (); + rtadv->sock = sock; + + install_element (INTERFACE_NODE, &ipv6_nd_suppress_ra_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_suppress_ra_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_send_ra_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_send_ra_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_ra_interval_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_ra_interval_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_ra_lifetime_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_ra_lifetime_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_reachable_time_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_reachable_time_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_managed_config_flag_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_managed_config_flag_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_other_config_flag_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_other_config_flag_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_prefix_advertisement_cmd); + install_element (INTERFACE_NODE, &ipv6_nd_prefix_advertisement_no_val_cmd); + install_element (INTERFACE_NODE, &no_ipv6_nd_prefix_advertisement_cmd); +} + +int +if_join_all_router (int sock, struct interface *ifp) +{ + int ret; + + struct ipv6_mreq mreq; + + memset (&mreq, 0, sizeof (struct ipv6_mreq)); + inet_pton (AF_INET6, ALLROUTER, &mreq.ipv6mr_multiaddr); + mreq.ipv6mr_interface = ifp->ifindex; + + ret = setsockopt (sock, IPPROTO_IPV6, IPV6_JOIN_GROUP, + (char *) &mreq, sizeof mreq); + if (ret < 0) + zlog_warn ("can't setsockopt IPV6_JOIN_GROUP: %s", strerror (errno)); + + zlog_info ("rtadv: %s join to all-routers multicast group", ifp->name); + + return 0; +} + +int +if_leave_all_router (int sock, struct interface *ifp) +{ + int ret; + + struct ipv6_mreq mreq; + + memset (&mreq, 0, sizeof (struct ipv6_mreq)); + inet_pton (AF_INET6, ALLROUTER, &mreq.ipv6mr_multiaddr); + mreq.ipv6mr_interface = ifp->ifindex; + + ret = setsockopt (sock, IPPROTO_IPV6, IPV6_LEAVE_GROUP, + (char *) &mreq, sizeof mreq); + if (ret < 0) + zlog_warn ("can't setsockopt IPV6_LEAVE_GROUP: %s", strerror (errno)); + + zlog_info ("rtadv: %s leave from all-routers multicast group", ifp->name); + + return 0; +} + +#else +void +rtadv_init () +{ + /* Empty.*/; +} +#endif /* RTADV && HAVE_IPV6 */ |