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Diffstat (limited to 'ripngd/ripngd.c')
| -rw-r--r-- | ripngd/ripngd.c | 2526 |
1 files changed, 2526 insertions, 0 deletions
diff --git a/ripngd/ripngd.c b/ripngd/ripngd.c new file mode 100644 index 00000000..81f0ecad --- /dev/null +++ b/ripngd/ripngd.c @@ -0,0 +1,2526 @@ +/* RIPng daemon + * Copyright (C) 1998, 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> + +/* For struct udphdr. */ +#include <netinet/udp.h> + +#include "prefix.h" +#include "filter.h" +#include "log.h" +#include "thread.h" +#include "memory.h" +#include "if.h" +#include "stream.h" +#include "table.h" +#include "command.h" +#include "sockopt.h" +#include "distribute.h" +#include "plist.h" +#include "routemap.h" +#include "if_rmap.h" + +#include "ripngd/ripngd.h" +#include "ripngd/ripng_route.h" +#include "ripngd/ripng_debug.h" + +#define min(a, b) ((a) < (b) ? (a) : (b)) + +/* RIPng structure which includes many parameters related to RIPng + protocol. If ripng couldn't active or ripng doesn't configured, + ripng->fd must be negative value. */ +struct ripng *ripng = NULL; + +enum +{ + ripng_all_route, + ripng_changed_route, + ripng_split_horizon, + ripng_no_split_horizon +}; + +/* Prototypes. */ +void +ripng_output_process (struct interface *, struct sockaddr_in6 *, int, int); + +int +ripng_triggered_update (struct thread *); + +/* RIPng next hop specification. */ +struct ripng_nexthop +{ + enum ripng_nexthop_type + { + RIPNG_NEXTHOP_UNSPEC, + RIPNG_NEXTHOP_ADDRESS + } flag; + struct in6_addr address; +}; + +/* Utility function for making IPv6 address string. */ +const char * +inet6_ntop (struct in6_addr *p) +{ + static char buf[INET6_ADDRSTRLEN]; + + inet_ntop (AF_INET6, p, buf, INET6_ADDRSTRLEN); + + return buf; +} + +/* Allocate new ripng information. */ +struct ripng_info * +ripng_info_new () +{ + struct ripng_info *new; + + new = XCALLOC (MTYPE_RIPNG_ROUTE, sizeof (struct ripng_info)); + return new; +} + +/* Free ripng information. */ +void +ripng_info_free (struct ripng_info *rinfo) +{ + XFREE (MTYPE_RIPNG_ROUTE, rinfo); +} + +static int +setsockopt_so_recvbuf (int sock, int size) +{ + int ret; + + ret = setsockopt (sock, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof (int)); + if (ret < 0) + zlog (NULL, LOG_ERR, "can't setsockopt SO_RCVBUF"); + return ret; +} + +/* Create ripng socket. */ +int +ripng_make_socket (void) +{ + int ret; + int sock; + struct sockaddr_in6 ripaddr; + + sock = socket (AF_INET6, SOCK_DGRAM, 0); + if (sock < 0) + { + zlog (NULL, LOG_ERR, "Can't make ripng socket"); + return sock; + } + + ret = setsockopt_so_recvbuf (sock, 8096); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_pktinfo (sock, 1); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_multicast_hops (sock, 255); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_multicast_loop (sock, 0); + if (ret < 0) + return ret; + ret = setsockopt_ipv6_hoplimit (sock, 1); + if (ret < 0) + return ret; + + memset (&ripaddr, 0, sizeof (ripaddr)); + ripaddr.sin6_family = AF_INET6; +#ifdef SIN6_LEN + ripaddr.sin6_len = sizeof (struct sockaddr_in6); +#endif /* SIN6_LEN */ + ripaddr.sin6_port = htons (RIPNG_PORT_DEFAULT); + + ret = bind (sock, (struct sockaddr *) &ripaddr, sizeof (ripaddr)); + if (ret < 0) + { + zlog (NULL, LOG_ERR, "Can't bind ripng socket: %s.", strerror (errno)); + return ret; + } + return sock; +} + +/* Send RIPng packet. */ +int +ripng_send_packet (caddr_t buf, int bufsize, struct sockaddr_in6 *to, + struct interface *ifp) +{ + int ret; + struct msghdr msg; + struct iovec iov; + struct cmsghdr *cmsgptr; + char adata [256]; + struct in6_pktinfo *pkt; + struct sockaddr_in6 addr; + +#ifdef DEBUG + if (to) + zlog_info ("DEBUG RIPng: send to %s", inet6_ntop (&to->sin6_addr)); + zlog_info ("DEBUG RIPng: send if %s", ifp->name); + zlog_info ("DEBUG RIPng: send packet size %d", bufsize); +#endif /* DEBUG */ + + 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_flowinfo = htonl (RIPNG_PRIORITY_DEFAULT); + + /* When destination is specified. */ + if (to != NULL) + { + addr.sin6_addr = to->sin6_addr; + addr.sin6_port = to->sin6_port; + } + else + { + inet_pton(AF_INET6, RIPNG_GROUP, &addr.sin6_addr); + addr.sin6_port = htons (RIPNG_PORT_DEFAULT); + } + + 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 = CMSG_SPACE(sizeof(struct in6_pktinfo)); + + iov.iov_base = buf; + iov.iov_len = bufsize; + + cmsgptr = (struct cmsghdr *)adata; + cmsgptr->cmsg_len = CMSG_LEN(sizeof (struct in6_pktinfo)); + 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 (ripng->sock, &msg, 0); + + if (ret < 0) + zlog_warn ("RIPng send fail on %s: %s", ifp->name, strerror (errno)); + + return ret; +} + +/* Receive UDP RIPng packet from socket. */ +int +ripng_recv_packet (int sock, u_char *buf, int bufsize, + struct sockaddr_in6 *from, unsigned int *ifindex, + int *hoplimit) +{ + int ret; + struct msghdr msg; + struct iovec iov; + struct cmsghdr *cmsgptr; + struct in6_addr dst; + + /* Ancillary data. This store cmsghdr and in6_pktinfo. But at this + point I can't determine size of cmsghdr */ + 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 = bufsize; + + /* 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; + dst = ptr->ipi6_addr; + + if (*ifindex == 0) + zlog_warn ("Interface index returned by IPV6_PKTINFO is zero"); + } + + /* Incoming packet's multicast hop limit. */ + if (cmsgptr->cmsg_level == IPPROTO_IPV6 && + cmsgptr->cmsg_type == IPV6_HOPLIMIT) + *hoplimit = *((int *) CMSG_DATA (cmsgptr)); + } + + /* Hoplimit check shold be done when destination address is + multicast address. */ + if (! IN6_IS_ADDR_MULTICAST (&dst)) + *hoplimit = -1; + + return ret; +} + +/* Dump rip packet */ +void +ripng_packet_dump (struct ripng_packet *packet, int size, char *sndrcv) +{ + caddr_t lim; + struct rte *rte; + char *command_str; + + /* Set command string. */ + if (packet->command == RIPNG_REQUEST) + command_str = "request"; + else if (packet->command == RIPNG_RESPONSE) + command_str = "response"; + else + command_str = "unknown"; + + /* Dump packet header. */ + zlog_info ("%s %s version %d packet size %d", + sndrcv, command_str, packet->version, size); + + /* Dump each routing table entry. */ + rte = packet->rte; + + for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) + { + if (rte->metric == RIPNG_METRIC_NEXTHOP) + zlog_info (" nexthop %s/%d", inet6_ntop (&rte->addr), rte->prefixlen); + else + zlog_info (" %s/%d metric %d tag %d", + inet6_ntop (&rte->addr), rte->prefixlen, + rte->metric, ntohs (rte->tag)); + } +} + +/* RIPng next hop address RTE (Route Table Entry). */ +void +ripng_nexthop_rte (struct rte *rte, + struct sockaddr_in6 *from, + struct ripng_nexthop *nexthop) +{ + char buf[INET6_BUFSIZ]; + + /* Logging before checking RTE. */ + if (IS_RIPNG_DEBUG_RECV) + zlog_info ("RIPng nexthop RTE address %s tag %d prefixlen %d", + inet6_ntop (&rte->addr), ntohs (rte->tag), rte->prefixlen); + + /* RFC2080 2.1.1 Next Hop: + The route tag and prefix length in the next hop RTE must be + set to zero on sending and ignored on receiption. */ + if (ntohs (rte->tag) != 0) + zlog_warn ("RIPng nexthop RTE with non zero tag value %d from %s", + ntohs (rte->tag), inet6_ntop (&from->sin6_addr)); + + if (rte->prefixlen != 0) + zlog_warn ("RIPng nexthop RTE with non zero prefixlen value %d from %s", + rte->prefixlen, inet6_ntop (&from->sin6_addr)); + + /* Specifying a value of 0:0:0:0:0:0:0:0 in the prefix field of a + next hop RTE indicates that the next hop address should be the + originator of the RIPng advertisement. An address specified as a + next hop must be a link-local address. */ + if (IN6_IS_ADDR_UNSPECIFIED (&rte->addr)) + { + nexthop->flag = RIPNG_NEXTHOP_UNSPEC; + memset (&nexthop->address, 0, sizeof (struct in6_addr)); + return; + } + + if (IN6_IS_ADDR_LINKLOCAL (&rte->addr)) + { + nexthop->flag = RIPNG_NEXTHOP_ADDRESS; + IPV6_ADDR_COPY (&nexthop->address, &rte->addr); + return; + } + + /* The purpose of the next hop RTE is to eliminate packets being + routed through extra hops in the system. It is particularly useful + when RIPng is not being run on all of the routers on a network. + Note that next hop RTE is "advisory". That is, if the provided + information is ignored, a possibly sub-optimal, but absolutely + valid, route may be taken. If the received next hop address is not + a link-local address, it should be treated as 0:0:0:0:0:0:0:0. */ + zlog_warn ("RIPng nexthop RTE with non link-local address %s from %s", + inet6_ntop (&rte->addr), + inet_ntop (AF_INET6, &from->sin6_addr, buf, INET6_BUFSIZ)); + + nexthop->flag = RIPNG_NEXTHOP_UNSPEC; + memset (&nexthop->address, 0, sizeof (struct in6_addr)); + + return; +} + +/* If ifp has same link-local address then return 1. */ +int +ripng_lladdr_check (struct interface *ifp, struct in6_addr *addr) +{ + listnode listnode; + struct connected *connected; + struct prefix *p; + + for (listnode = listhead (ifp->connected); listnode; nextnode (listnode)) + if ((connected = getdata (listnode)) != NULL) + { + p = connected->address; + + if (p->family == AF_INET6 && + IN6_IS_ADDR_LINKLOCAL (&p->u.prefix6) && + IN6_ARE_ADDR_EQUAL (&p->u.prefix6, addr)) + return 1; + } + return 0; +} + +/* RIPng route garbage collect timer. */ +int +ripng_garbage_collect (struct thread *t) +{ + struct ripng_info *rinfo; + struct route_node *rp; + + rinfo = THREAD_ARG (t); + rinfo->t_garbage_collect = NULL; + + /* Off timeout timer. */ + RIPNG_TIMER_OFF (rinfo->t_timeout); + + /* Get route_node pointer. */ + rp = rinfo->rp; + + /* Delete this route from the kernel. */ + ripng_zebra_ipv6_delete ((struct prefix_ipv6 *)&rp->p, + &rinfo->nexthop, rinfo->ifindex); + rinfo->flags &= ~RIPNG_RTF_FIB; + + /* Aggregate count decrement. */ + ripng_aggregate_decrement (rp, rinfo); + + /* Unlock route_node. */ + rp->info = NULL; + route_unlock_node (rp); + + /* Free RIPng routing information. */ + ripng_info_free (rinfo); + + return 0; +} + +/* Timeout RIPng routes. */ +int +ripng_timeout (struct thread *t) +{ + struct ripng_info *rinfo; + struct route_node *rp; + + rinfo = THREAD_ARG (t); + rinfo->t_timeout = NULL; + + /* Get route_node pointer. */ + rp = rinfo->rp; + + /* - The garbage-collection timer is set for 120 seconds. */ + RIPNG_TIMER_ON (rinfo->t_garbage_collect, ripng_garbage_collect, + ripng->garbage_time); + + /* - The metric for the route is set to 16 (infinity). This causes + the route to be removed from service. */ + rinfo->metric = RIPNG_METRIC_INFINITY; + + /* - The route change flag is to indicate that this entry has been + changed. */ + rinfo->flags |= RIPNG_RTF_CHANGED; + + /* - The output process is signalled to trigger a response. */ + ripng_event (RIPNG_TRIGGERED_UPDATE, 0); + + return 0; +} + +void +ripng_timeout_update (struct ripng_info *rinfo) +{ + if (rinfo->metric != RIPNG_METRIC_INFINITY) + { + RIPNG_TIMER_OFF (rinfo->t_timeout); + RIPNG_TIMER_ON (rinfo->t_timeout, ripng_timeout, ripng->timeout_time); + } +} + +/* Process RIPng route according to RFC2080. */ +void +ripng_route_process (struct rte *rte, struct sockaddr_in6 *from, + struct ripng_nexthop *ripng_nexthop, + struct interface *ifp) +{ + struct prefix_ipv6 p; + struct route_node *rp; + struct ripng_info *rinfo; + struct ripng_interface *ri; + struct in6_addr *nexthop; + u_char oldmetric; + int same = 0; + + /* Make prefix structure. */ + memset (&p, 0, sizeof (struct prefix_ipv6)); + p.family = AF_INET6; + /* p.prefix = rte->addr; */ + IPV6_ADDR_COPY (&p.prefix, &rte->addr); + p.prefixlen = rte->prefixlen; + + /* Make sure mask is applied. */ + /* XXX We have to check the prefix is valid or not before call + apply_mask_ipv6. */ + apply_mask_ipv6 (&p); + + /* Apply input filters. */ + ri = ifp->info; + + if (ri->list[RIPNG_FILTER_IN]) + { + if (access_list_apply (ri->list[RIPNG_FILTER_IN], &p) == FILTER_DENY) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by distribute in", + inet6_ntop (&p.prefix), p.prefixlen); + return; + } + } + if (ri->prefix[RIPNG_FILTER_IN]) + { + if (prefix_list_apply (ri->prefix[RIPNG_FILTER_IN], &p) == PREFIX_DENY) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by prefix-list in", + inet6_ntop (&p.prefix), p.prefixlen); + return; + } + } + + /* Modify entry. */ + if (ri->routemap[RIPNG_FILTER_IN]) + { + int ret; + struct ripng_info newinfo; + + memset (&rinfo, 0, sizeof (struct ripng_info)); + newinfo.metric = rte->metric; + + ret = route_map_apply (ri->routemap[RIPNG_FILTER_IN], + (struct prefix *)&p, RMAP_RIPNG, &newinfo); + + if (ret == RMAP_DENYMATCH) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by route-map in", + inet6_ntop (&p.prefix), p.prefixlen); + return; + } + + rte->metric = newinfo.metric; + } + + /* Set nexthop pointer. */ + if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) + nexthop = &ripng_nexthop->address; + else + nexthop = &from->sin6_addr; + + /* Lookup RIPng routing table. */ + rp = route_node_get (ripng->table, (struct prefix *) &p); + + if (rp->info == NULL) + { + /* Now, check to see whether there is already an explicit route + for the destination prefix. If there is no such route, add + this route to the routing table, unless the metric is + infinity (there is no point in adding a route which + unusable). */ + if (rte->metric != RIPNG_METRIC_INFINITY) + { + rinfo = ripng_info_new (); + + /* - Setting the destination prefix and length to those in + the RTE. */ + rp->info = rinfo; + rinfo->rp = rp; + + /* - Setting the metric to the newly calculated metric (as + described above). */ + rinfo->metric = rte->metric; + rinfo->tag = ntohs (rte->tag); + + /* - Set the next hop address to be the address of the router + from which the datagram came or the next hop address + specified by a next hop RTE. */ + IPV6_ADDR_COPY (&rinfo->nexthop, nexthop); + IPV6_ADDR_COPY (&rinfo->from, &from->sin6_addr); + rinfo->ifindex = ifp->ifindex; + + /* - Initialize the timeout for the route. If the + garbage-collection timer is running for this route, stop it. */ + ripng_timeout_update (rinfo); + + /* - Set the route change flag. */ + rinfo->flags |= RIPNG_RTF_CHANGED; + + /* - Signal the output process to trigger an update (see section + 2.5). */ + ripng_event (RIPNG_TRIGGERED_UPDATE, 0); + + /* Finally, route goes into the kernel. */ + rinfo->type = ZEBRA_ROUTE_RIPNG; + rinfo->sub_type = RIPNG_ROUTE_RTE; + + ripng_zebra_ipv6_add (&p, &rinfo->nexthop, rinfo->ifindex); + rinfo->flags |= RIPNG_RTF_FIB; + + /* Aggregate check. */ + ripng_aggregate_increment (rp, rinfo); + } + } + else + { + rinfo = rp->info; + + /* If there is an existing route, compare the next hop address + to the address of the router from which the datagram came. + If this datagram is from the same router as the existing + route, reinitialize the timeout. */ + same = (IN6_ARE_ADDR_EQUAL (&rinfo->from, &from->sin6_addr) + && (rinfo->ifindex == ifp->ifindex)); + + if (same) + ripng_timeout_update (rinfo); + + /* Next, compare the metrics. If the datagram is from the same + router as the existing route, and the new metric is different + than the old one; or, if the new metric is lower than the old + one; do the following actions: */ + if ((same && rinfo->metric != rte->metric) || + rte->metric < rinfo->metric) + { + /* - Adopt the route from the datagram. That is, put the + new metric in, and adjust the next hop address (if + necessary). */ + oldmetric = rinfo->metric; + rinfo->metric = rte->metric; + rinfo->tag = ntohs (rte->tag); + + if (! IN6_ARE_ADDR_EQUAL (&rinfo->nexthop, nexthop)) + { + ripng_zebra_ipv6_delete (&p, &rinfo->nexthop, rinfo->ifindex); + ripng_zebra_ipv6_add (&p, nexthop, ifp->ifindex); + rinfo->flags |= RIPNG_RTF_FIB; + + IPV6_ADDR_COPY (&rinfo->nexthop, nexthop); + } + IPV6_ADDR_COPY (&rinfo->from, &from->sin6_addr); + rinfo->ifindex = ifp->ifindex; + + /* - Set the route change flag and signal the output process + to trigger an update. */ + rinfo->flags |= RIPNG_RTF_CHANGED; + ripng_event (RIPNG_TRIGGERED_UPDATE, 0); + + /* - If the new metric is infinity, start the deletion + process (described above); */ + if (rinfo->metric == RIPNG_METRIC_INFINITY) + { + /* If the new metric is infinity, the deletion process + begins for the route, which is no longer used for + routing packets. Note that the deletion process is + started only when the metric is first set to + infinity. If the metric was already infinity, then a + new deletion process is not started. */ + if (oldmetric != RIPNG_METRIC_INFINITY) + { + /* - The garbage-collection timer is set for 120 seconds. */ + RIPNG_TIMER_ON (rinfo->t_garbage_collect, + ripng_garbage_collect, ripng->garbage_time); + RIPNG_TIMER_OFF (rinfo->t_timeout); + + /* - The metric for the route is set to 16 + (infinity). This causes the route to be removed + from service.*/ + /* - The route change flag is to indicate that this + entry has been changed. */ + /* - The output process is signalled to trigger a + response. */ + ; /* Above processes are already done previously. */ + } + } + else + { + /* otherwise, re-initialize the timeout. */ + ripng_timeout_update (rinfo); + + /* Should a new route to this network be established + while the garbage-collection timer is running, the + new route will replace the one that is about to be + deleted. In this case the garbage-collection timer + must be cleared. */ + RIPNG_TIMER_OFF (rinfo->t_garbage_collect); + } + } + /* Unlock tempolary lock of the route. */ + route_unlock_node (rp); + } +} + +/* Add redistributed route to RIPng table. */ +void +ripng_redistribute_add (int type, int sub_type, struct prefix_ipv6 *p, + unsigned int ifindex) +{ + struct route_node *rp; + struct ripng_info *rinfo; + + /* Redistribute route */ + if (IN6_IS_ADDR_LINKLOCAL (&p->prefix)) + return; + if (IN6_IS_ADDR_LOOPBACK (&p->prefix)) + return; + + rp = route_node_get (ripng->table, (struct prefix *) p); + rinfo = rp->info; + + if (rinfo) + { + RIPNG_TIMER_OFF (rinfo->t_timeout); + RIPNG_TIMER_OFF (rinfo->t_garbage_collect); + route_unlock_node (rp); + } + else + { + rinfo = ripng_info_new (); + ripng_aggregate_increment (rp, rinfo); + } + + rinfo->type = type; + rinfo->sub_type = sub_type; + rinfo->ifindex = ifindex; + rinfo->metric = 1; + rinfo->flags |= RIPNG_RTF_FIB; + + rinfo->rp = rp; + rp->info = rinfo; +} + +/* Delete redistributed route to RIPng table. */ +void +ripng_redistribute_delete (int type, int sub_type, struct prefix_ipv6 *p, + unsigned int ifindex) +{ + struct route_node *rp; + struct ripng_info *rinfo; + + if (IN6_IS_ADDR_LINKLOCAL (&p->prefix)) + return; + if (IN6_IS_ADDR_LOOPBACK (&p->prefix)) + return; + + rp = route_node_lookup (ripng->table, (struct prefix *) p); + + if (rp) + { + rinfo = rp->info; + + if (rinfo != NULL + && rinfo->type == type + && rinfo->sub_type == sub_type + && rinfo->ifindex == ifindex) + { + rp->info = NULL; + + RIPNG_TIMER_OFF (rinfo->t_timeout); + RIPNG_TIMER_OFF (rinfo->t_garbage_collect); + + ripng_info_free (rinfo); + + route_unlock_node (rp); + } + + /* For unlock route_node_lookup (). */ + route_unlock_node (rp); + } +} + +/* Withdraw redistributed route. */ +void +ripng_redistribute_withdraw (int type) +{ + struct route_node *rp; + struct ripng_info *rinfo; + + for (rp = route_top (ripng->table); rp; rp = route_next (rp)) + if ((rinfo = rp->info) != NULL) + { + if (rinfo->type == type) + { + rp->info = NULL; + + RIPNG_TIMER_OFF (rinfo->t_timeout); + RIPNG_TIMER_OFF (rinfo->t_garbage_collect); + + ripng_info_free (rinfo); + + route_unlock_node (rp); + } + } +} + +/* RIP routing information. */ +void +ripng_response_process (struct ripng_packet *packet, int size, + struct sockaddr_in6 *from, struct interface *ifp, + int hoplimit) +{ + caddr_t lim; + struct rte *rte; + struct ripng_nexthop nexthop; + + /* RFC2080 2.4.2 Response Messages: + The Response must be ignored if it is not from the RIPng port. */ + if (ntohs (from->sin6_port) != RIPNG_PORT_DEFAULT) + { + zlog_warn ("RIPng packet comes from non RIPng port %d from %s", + ntohs (from->sin6_port), inet6_ntop (&from->sin6_addr)); + return; + } + + /* The datagram's IPv6 source address should be checked to see + whether the datagram is from a valid neighbor; the source of the + datagram must be a link-local address. */ + if (! IN6_IS_ADDR_LINKLOCAL(&from->sin6_addr)) + { + zlog_warn ("RIPng packet comes from non link local address %s", + inet6_ntop (&from->sin6_addr)); + return; + } + + /* It is also worth checking to see whether the response is from one + of the router's own addresses. Interfaces on broadcast networks + may receive copies of their own multicasts immediately. If a + router processes its own output as new input, confusion is likely, + and such datagrams must be ignored. */ + if (ripng_lladdr_check (ifp, &from->sin6_addr)) + { + zlog_warn ("RIPng packet comes from my own link local address %s", + inet6_ntop (&from->sin6_addr)); + return; + } + + /* As an additional check, periodic advertisements must have their + hop counts set to 255, and inbound, multicast packets sent from the + RIPng port (i.e. periodic advertisement or triggered update + packets) must be examined to ensure that the hop count is 255. */ + if (hoplimit >= 0 && hoplimit != 255) + { + zlog_warn ("RIPng packet comes with non 255 hop count %d from %s", + hoplimit, inet6_ntop (&from->sin6_addr)); + return; + } + + /* Reset nexthop. */ + memset (&nexthop, 0, sizeof (struct ripng_nexthop)); + nexthop.flag = RIPNG_NEXTHOP_UNSPEC; + + /* Set RTE pointer. */ + rte = packet->rte; + + for (lim = ((caddr_t) packet) + size; (caddr_t) rte < lim; rte++) + { + /* First of all, we have to check this RTE is next hop RTE or + not. Next hop RTE is completely different with normal RTE so + we need special treatment. */ + if (rte->metric == RIPNG_METRIC_NEXTHOP) + { + ripng_nexthop_rte (rte, from, &nexthop); + continue; + } + + /* RTE information validation. */ + + /* - is the destination prefix valid (e.g., not a multicast + prefix and not a link-local address) A link-local address + should never be present in an RTE. */ + if (IN6_IS_ADDR_MULTICAST (&rte->addr)) + { + zlog_warn ("Destination prefix is a multicast address %s/%d [%d]", + inet6_ntop (&rte->addr), rte->prefixlen, rte->metric); + continue; + } + if (IN6_IS_ADDR_LINKLOCAL (&rte->addr)) + { + zlog_warn ("Destination prefix is a link-local address %s/%d [%d]", + inet6_ntop (&rte->addr), rte->prefixlen, rte->metric); + continue; + } + if (IN6_IS_ADDR_LOOPBACK (&rte->addr)) + { + zlog_warn ("Destination prefix is a loopback address %s/%d [%d]", + inet6_ntop (&rte->addr), rte->prefixlen, rte->metric); + continue; + } + + /* - is the prefix length valid (i.e., between 0 and 128, + inclusive) */ + if (rte->prefixlen > 128) + { + zlog_warn ("Invalid prefix length %s/%d from %s%%%s", + inet6_ntop (&rte->addr), rte->prefixlen, + inet6_ntop (&from->sin6_addr), ifp->name); + continue; + } + + /* - is the metric valid (i.e., between 1 and 16, inclusive) */ + if (! (rte->metric >= 1 && rte->metric <= 16)) + { + zlog_warn ("Invalid metric %d from %s%%%s", rte->metric, + inet6_ntop (&from->sin6_addr), ifp->name); + continue; + } + + /* Metric calculation. */ + rte->metric += ifp->metric; + if (rte->metric > RIPNG_METRIC_INFINITY) + rte->metric = RIPNG_METRIC_INFINITY; + + /* Routing table updates. */ + ripng_route_process (rte, from, &nexthop, ifp); + } +} + +/* Response to request message. */ +void +ripng_request_process (struct ripng_packet *packet,int size, + struct sockaddr_in6 *from, struct interface *ifp) +{ + caddr_t lim; + struct rte *rte; + struct prefix_ipv6 p; + struct route_node *rp; + struct ripng_info *rinfo; + struct ripng_interface *ri; + + /* Check RIPng process is enabled on this interface. */ + ri = ifp->info; + if (! ri->running) + return; + + /* When passive interface is specified, suppress responses */ + if (ri->passive) + return; + + lim = ((caddr_t) packet) + size; + rte = packet->rte; + + /* The Request is processed entry by entry. If there are no + entries, no response is given. */ + if (lim == (caddr_t) rte) + return; + + /* There is one special case. If there is exactly one entry in the + request, and it has a destination prefix of zero, a prefix length + of zero, and a metric of infinity (i.e., 16), then this is a + request to send the entire routing table. In that case, a call + is made to the output process to send the routing table to the + requesting address/port. */ + if (lim == ((caddr_t) (rte + 1)) && + IN6_IS_ADDR_UNSPECIFIED (&rte->addr) && + rte->prefixlen == 0 && + rte->metric == RIPNG_METRIC_INFINITY) + { + /* All route with split horizon */ + ripng_output_process (ifp, from, ripng_all_route, ripng_split_horizon); + } + else + { + /* Except for this special case, processing is quite simple. + Examine the list of RTEs in the Request one by one. For each + entry, look up the destination in the router's routing + database and, if there is a route, put that route's metric in + the metric field of the RTE. If there is no explicit route + to the specified destination, put infinity in the metric + field. Once all the entries have been filled in, change the + command from Request to Response and send the datagram back + to the requestor. */ + memset (&p, 0, sizeof (struct prefix_ipv6)); + p.family = AF_INET6; + + for (; ((caddr_t) rte) < lim; rte++) + { + p.prefix = rte->addr; + p.prefixlen = rte->prefixlen; + apply_mask_ipv6 (&p); + + rp = route_node_lookup (ripng->table, (struct prefix *) &p); + + if (rp) + { + rinfo = rp->info; + rte->metric = rinfo->metric; + route_unlock_node (rp); + } + else + rte->metric = RIPNG_METRIC_INFINITY; + } + packet->command = RIPNG_RESPONSE; + + ripng_send_packet ((caddr_t) packet, size, from, ifp); + } +} + +/* First entry point of reading RIPng packet. */ +int +ripng_read (struct thread *thread) +{ + int len; + int sock; + struct sockaddr_in6 from; + struct ripng_packet *packet; + unsigned int ifindex; + struct interface *ifp; + int hoplimit = -1; + + /* Check ripng is active and alive. */ + assert (ripng != NULL); + assert (ripng->sock >= 0); + + /* Fetch thread data and set read pointer to empty for event + managing. `sock' sould be same as ripng->sock. */ + sock = THREAD_FD (thread); + ripng->t_read = NULL; + + /* Add myself to the next event. */ + ripng_event (RIPNG_READ, sock); + + /* Read RIPng packet. */ + len = ripng_recv_packet (sock, STREAM_DATA (ripng->ibuf), + STREAM_SIZE (ripng->ibuf), &from, &ifindex, + &hoplimit); + if (len < 0) + { + zlog_warn ("RIPng recvfrom failed: %s.", strerror (errno)); + return len; + } + + /* Check RTE boundary. RTE size (Packet length - RIPng header size + (4)) must be multiple size of one RTE size (20). */ + if (((len - 4) % 20) != 0) + { + zlog_warn ("RIPng invalid packet size %d from %s", len, + inet6_ntop (&from.sin6_addr)); + return 0; + } + + packet = (struct ripng_packet *) STREAM_DATA (ripng->ibuf); + ifp = if_lookup_by_index (ifindex); + + /* RIPng packet received. */ + if (IS_RIPNG_DEBUG_EVENT) + zlog_info ("RIPng packet received from %s port %d on %s", + inet6_ntop (&from.sin6_addr), ntohs (from.sin6_port), + ifp ? ifp->name : "unknown"); + + /* Logging before packet checking. */ + if (IS_RIPNG_DEBUG_RECV) + ripng_packet_dump (packet, len, "RECV"); + + /* Packet comes from unknown interface. */ + if (ifp == NULL) + { + zlog_warn ("RIPng packet comes from unknown interface %d", ifindex); + return 0; + } + + /* Packet version mismatch checking. */ + if (packet->version != ripng->version) + { + zlog_warn ("RIPng packet version %d doesn't fit to my version %d", + packet->version, ripng->version); + return 0; + } + + /* Process RIPng packet. */ + switch (packet->command) + { + case RIPNG_REQUEST: + ripng_request_process (packet, len, &from, ifp); + break; + case RIPNG_RESPONSE: + ripng_response_process (packet, len, &from, ifp, hoplimit); + break; + default: + zlog_warn ("Invalid RIPng command %d", packet->command); + break; + } + return 0; +} + +/* Walk down the RIPng routing table then clear changed flag. */ +void +ripng_clear_changed_flag () +{ + struct route_node *rp; + struct ripng_info *rinfo; + + for (rp = route_top (ripng->table); rp; rp = route_next (rp)) + if ((rinfo = rp->info) != NULL) + if (rinfo->flags & RIPNG_RTF_CHANGED) + rinfo->flags &= ~RIPNG_RTF_CHANGED; +} + +/* Regular update of RIPng route. Send all routing formation to RIPng + enabled interface. */ +int +ripng_update (struct thread *t) +{ + listnode node; + struct interface *ifp; + struct ripng_interface *ri; + + /* Clear update timer thread. */ + ripng->t_update = NULL; + + /* Logging update event. */ + if (IS_RIPNG_DEBUG_EVENT) + zlog_info ("RIPng update timer expired!"); + + /* Supply routes to each interface. */ + for (node = listhead (iflist); node; nextnode (node)) + { + ifp = getdata (node); + ri = ifp->info; + + if (if_is_loopback (ifp) || ! if_is_up (ifp)) + continue; + + if (! ri->running) + continue; + + /* When passive interface is specified, suppress announce to the + interface. */ + if (ri->passive) + continue; + +#if RIPNG_ADVANCED + if (ri->ri_send == RIPNG_SEND_OFF) + { + if (IS_RIPNG_DEBUG_EVENT) + zlog (NULL, LOG_INFO, + "[Event] RIPng send to if %d is suppressed by config", + ifp->ifindex); + continue; + } +#endif /* RIPNG_ADVANCED */ + + ripng_output_process (ifp, NULL, ripng_all_route, ripng_split_horizon); + } + + /* Triggered updates may be suppressed if a regular update is due by + the time the triggered update would be sent. */ + if (ripng->t_triggered_interval) + { + thread_cancel (ripng->t_triggered_interval); + ripng->t_triggered_interval = NULL; + } + ripng->trigger = 0; + + /* Reset flush event. */ + ripng_event (RIPNG_UPDATE_EVENT, 0); + + return 0; +} + +/* Triggered update interval timer. */ +int +ripng_triggered_interval (struct thread *t) +{ + ripng->t_triggered_interval = NULL; + + if (ripng->trigger) + { + ripng->trigger = 0; + ripng_triggered_update (t); + } + return 0; +} + +/* Execute triggered update. */ +int +ripng_triggered_update (struct thread *t) +{ + listnode node; + struct interface *ifp; + struct ripng_interface *ri; + int interval; + + ripng->t_triggered_update = NULL; + + /* Cancel interval timer. */ + if (ripng->t_triggered_interval) + { + thread_cancel (ripng->t_triggered_interval); + ripng->t_triggered_interval = NULL; + } + ripng->trigger = 0; + + /* Logging triggered update. */ + if (IS_RIPNG_DEBUG_EVENT) + zlog_info ("RIPng triggered update!"); + + /* Split Horizon processing is done when generating triggered + updates as well as normal updates (see section 2.6). */ + for (node = listhead (iflist); node; nextnode (node)) + { + ifp = getdata (node); + ri = ifp->info; + + if (if_is_loopback (ifp) || ! if_is_up (ifp)) + continue; + + if (! ri->running) + continue; + + /* When passive interface is specified, suppress announce to the + interface. */ + if (ri->passive) + continue; + + ripng_output_process (ifp, NULL, ripng_changed_route, + ripng_split_horizon); + } + + /* Once all of the triggered updates have been generated, the route + change flags should be cleared. */ + ripng_clear_changed_flag (); + + /* After a triggered update is sent, a timer should be set for a + random interval between 1 and 5 seconds. If other changes that + would trigger updates occur before the timer expires, a single + update is triggered when the timer expires. */ + interval = (random () % 5) + 1; + + ripng->t_triggered_interval = + thread_add_timer (master, ripng_triggered_interval, NULL, interval); + + return 0; +} + +/* Write routing table entry to the stream and return next index of + the routing table entry in the stream. */ +int +ripng_write_rte (int num, struct stream *s, struct prefix_ipv6 *p, + u_int16_t tag, u_char metric) +{ + /* RIPng packet header. */ + if (num == 0) + { + stream_putc (s, RIPNG_RESPONSE); + stream_putc (s, RIPNG_V1); + stream_putw (s, 0); + } + + /* Write routing table entry. */ + stream_write (s, (caddr_t) &p->prefix, sizeof (struct in6_addr)); + stream_putw (s, tag); + stream_putc (s, p->prefixlen); + stream_putc (s, metric); + + return ++num; +} + +/* Send RESPONSE message to specified destination. */ +void +ripng_output_process (struct interface *ifp, struct sockaddr_in6 *to, + int route_type, int split_horizon) +{ + int ret; + struct stream *s; + struct route_node *rp; + struct ripng_info *rinfo; + struct ripng_interface *ri; + struct ripng_aggregate *aggregate; + struct prefix_ipv6 *p; + int num; + int mtu; + int rtemax; + u_char metric; + u_char metric_set; + + if (IS_RIPNG_DEBUG_EVENT) + zlog_info ("RIPng update routes on interface %s", ifp->name); + + /* Output stream get from ripng structre. XXX this should be + interface structure. */ + s = ripng->obuf; + + /* Reset stream and RTE counter. */ + stream_reset (s); + num = 0; + + mtu = ifp->mtu; + if (mtu < 0) + mtu = IFMINMTU; + + rtemax = (min (mtu, RIPNG_MAX_PACKET_SIZE) - + IPV6_HDRLEN - + sizeof (struct udphdr) - + sizeof (struct ripng_packet) + + sizeof (struct rte)) / sizeof (struct rte); + +#ifdef DEBUG + zlog_info ("DEBUG RIPng: ifmtu is %d", ifp->mtu); + zlog_info ("DEBUG RIPng: rtemax is %d", rtemax); +#endif /* DEBUG */ + + /* Get RIPng interface. */ + ri = ifp->info; + + for (rp = route_top (ripng->table); rp; rp = route_next (rp)) + { + if ((rinfo = rp->info) != NULL && rinfo->suppress == 0) + { + p = (struct prefix_ipv6 *) &rp->p; + metric = rinfo->metric; + + /* Changed route only output. */ + if (route_type == ripng_changed_route && + (! (rinfo->flags & RIPNG_RTF_CHANGED))) + continue; + + /* Split horizon. */ + if (split_horizon == ripng_split_horizon && + rinfo->ifindex == ifp->ifindex) + continue; + + /* Apply output filters.*/ + if (ri->list[RIPNG_FILTER_OUT]) + { + if (access_list_apply (ri->list[RIPNG_FILTER_OUT], + (struct prefix *) p) == FILTER_DENY) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by distribute out", + inet6_ntop (&p->prefix), p->prefixlen); + continue; + } + } + if (ri->prefix[RIPNG_FILTER_OUT]) + { + if (prefix_list_apply (ri->prefix[RIPNG_FILTER_OUT], + (struct prefix *) p) == PREFIX_DENY) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by prefix-list out", + inet6_ntop (&p->prefix), p->prefixlen); + continue; + } + } + + /* Preparation for route-map. */ + metric_set = 0; + + /* Route-map */ + if (ri->routemap[RIPNG_FILTER_OUT]) + { + int ret; + struct ripng_info newinfo; + + memset (&newinfo, 0, sizeof (struct ripng_info)); + newinfo.metric = metric; + + ret = route_map_apply (ri->routemap[RIPNG_FILTER_OUT], + (struct prefix *) p, RMAP_RIPNG, + &newinfo); + + if (ret == RMAP_DENYMATCH) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by route-map out", + inet6_ntop (&p->prefix), p->prefixlen); + return; + } + + metric = newinfo.metric; + metric_set = newinfo.metric_set; + } + + /* When the interface route-map does not set metric */ + if (! metric_set) + { + /* and the redistribute route-map is set. */ + if (ripng->route_map[rinfo->type].name) + { + int ret; + struct ripng_info newinfo; + + memset (&newinfo, 0, sizeof (struct ripng_info)); + newinfo.metric = metric; + + ret = route_map_apply (ripng->route_map[rinfo->type].map, + (struct prefix *) p, RMAP_RIPNG, + &newinfo); + + if (ret == RMAP_DENYMATCH) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by route-map", + inet6_ntop (&p->prefix), p->prefixlen); + continue; + } + + metric = newinfo.metric; + metric_set = newinfo.metric_set; + } + + /* When the redistribute route-map does not set metric. */ + if (! metric_set) + { + /* If the redistribute metric is set. */ + if (ripng->route_map[rinfo->type].metric_config + && rinfo->metric != RIPNG_METRIC_INFINITY) + { + metric = ripng->route_map[rinfo->type].metric; + } + else + { + /* If the route is not connected or localy generated + one, use default-metric value */ + if (rinfo->type != ZEBRA_ROUTE_RIPNG + && rinfo->type != ZEBRA_ROUTE_CONNECT + && rinfo->metric != RIPNG_METRIC_INFINITY) + metric = ripng->default_metric; + } + } + } + + /* Write RTE to the stream. */ + num = ripng_write_rte (num, s, p, rinfo->tag, metric); + if (num == rtemax) + { + ret = ripng_send_packet (STREAM_DATA (s), stream_get_endp (s), + to, ifp); + + if (ret >= 0 && IS_RIPNG_DEBUG_SEND) + ripng_packet_dump ((struct ripng_packet *)STREAM_DATA (s), + stream_get_endp(s), "SEND"); + num = 0; + stream_reset (s); + } + } + if ((aggregate = rp->aggregate) != NULL && + aggregate->count > 0 && + aggregate->suppress == 0) + { + p = (struct prefix_ipv6 *) &rp->p; + metric = aggregate->metric; + + /* Apply output filters.*/ + if (ri->list[RIPNG_FILTER_OUT]) + { + if (access_list_apply (ri->list[RIPNG_FILTER_OUT], + (struct prefix *) p) == FILTER_DENY) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by distribute out", + inet6_ntop (&p->prefix), p->prefixlen); + continue; + } + } + if (ri->prefix[RIPNG_FILTER_OUT]) + { + if (prefix_list_apply (ri->prefix[RIPNG_FILTER_OUT], + (struct prefix *) p) == PREFIX_DENY) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by prefix-list out", + inet6_ntop (&p->prefix), p->prefixlen); + continue; + } + } + + /* Route-map */ + if (ri->routemap[RIPNG_FILTER_OUT]) + { + int ret; + struct ripng_info newinfo; + + memset (&newinfo, 0, sizeof (struct ripng_info)); + newinfo.metric = metric; + + ret = route_map_apply (ri->routemap[RIPNG_FILTER_OUT], + (struct prefix *) p, RMAP_RIPNG, + &newinfo); + + if (ret == RMAP_DENYMATCH) + { + if (IS_RIPNG_DEBUG_PACKET) + zlog_info ("RIPng %s/%d is filtered by route-map out", + inet6_ntop (&p->prefix), p->prefixlen); + return; + } + + metric = newinfo.metric; + } + + /* Changed route only output. */ + if (route_type == ripng_changed_route) + continue; + + /* Write RTE to the stream. */ + num = ripng_write_rte (num, s, p, aggregate->tag, metric); + if (num == rtemax) + { + ret = ripng_send_packet (STREAM_DATA (s), stream_get_endp (s), + to, ifp); + + if (ret >= 0 && IS_RIPNG_DEBUG_SEND) + ripng_packet_dump ((struct ripng_packet *)STREAM_DATA (s), + stream_get_endp(s), "SEND"); + num = 0; + stream_reset (s); + } + } + + } + + /* If unwritten RTE exist, flush it. */ + if (num != 0) + { + ret = ripng_send_packet (STREAM_DATA (s), stream_get_endp (s), + to, ifp); + + if (ret >= 0 && IS_RIPNG_DEBUG_SEND) + ripng_packet_dump ((struct ripng_packet *)STREAM_DATA (s), + stream_get_endp (s), "SEND"); + num = 0; + stream_reset (s); + } +} + +/* Create new RIPng instance and set it to global variable. */ +int +ripng_create () +{ + /* ripng should be NULL. */ + assert (ripng == NULL); + + /* Allocaste RIPng instance. */ + ripng = XMALLOC (0, sizeof (struct ripng)); + memset (ripng, 0, sizeof (struct ripng)); + + /* Default version and timer values. */ + ripng->version = RIPNG_V1; + ripng->update_time = RIPNG_UPDATE_TIMER_DEFAULT; + ripng->timeout_time = RIPNG_TIMEOUT_TIMER_DEFAULT; + ripng->garbage_time = RIPNG_GARBAGE_TIMER_DEFAULT; + ripng->default_metric = RIPNG_DEFAULT_METRIC_DEFAULT; + + /* Make buffer. */ + ripng->ibuf = stream_new (RIPNG_MAX_PACKET_SIZE * 5); + ripng->obuf = stream_new (RIPNG_MAX_PACKET_SIZE); + + /* Initialize RIPng routig table. */ + ripng->table = route_table_init (); + ripng->route = route_table_init (); + ripng->aggregate = route_table_init (); + + /* Make socket. */ + ripng->sock = ripng_make_socket (); + if (ripng->sock < 0) + return ripng->sock; + + /* Threads. */ + ripng_event (RIPNG_READ, ripng->sock); + ripng_event (RIPNG_UPDATE_EVENT, 1); + + return 0; +} + +/* Sned RIPng request to the interface. */ +int +ripng_request (struct interface *ifp) +{ + struct rte *rte; + struct ripng_packet ripng_packet; + + if (IS_RIPNG_DEBUG_EVENT) + zlog_info ("RIPng send request to %s", ifp->name); + + memset (&ripng_packet, 0, sizeof (ripng_packet)); + ripng_packet.command = RIPNG_REQUEST; + ripng_packet.version = RIPNG_V1; + rte = ripng_packet.rte; + rte->metric = RIPNG_METRIC_INFINITY; + + return ripng_send_packet ((caddr_t) &ripng_packet, sizeof (ripng_packet), + NULL, ifp); +} + +/* Clean up installed RIPng routes. */ +void +ripng_terminate () +{ + struct route_node *rp; + struct ripng_info *rinfo; + + for (rp = route_top (ripng->table); rp; rp = route_next (rp)) + if ((rinfo = rp->info) != NULL) + { + if (rinfo->type == ZEBRA_ROUTE_RIPNG && + rinfo->sub_type == RIPNG_ROUTE_RTE) + ripng_zebra_ipv6_delete ((struct prefix_ipv6 *)&rp->p, + &rinfo->nexthop, rinfo->ifindex); + } +} + +int +ripng_update_jitter (int time) +{ + return ((rand () % (time + 1)) - (time / 2)); +} + +void +ripng_event (enum ripng_event event, int sock) +{ + int ripng_request_all (struct thread *); + int jitter = 0; + + switch (event) + { + case RIPNG_READ: + if (!ripng->t_read) + ripng->t_read = thread_add_read (master, ripng_read, NULL, sock); + break; + case RIPNG_UPDATE_EVENT: + if (ripng->t_update) + { + thread_cancel (ripng->t_update); + ripng->t_update = NULL; + } + /* Update timer jitter. */ + jitter = ripng_update_jitter (ripng->update_time); + + ripng->t_update = + thread_add_timer (master, ripng_update, NULL, + sock ? 2 : ripng->update_time + jitter); + break; + case RIPNG_TRIGGERED_UPDATE: + if (ripng->t_triggered_interval) + ripng->trigger = 1; + else if (! ripng->t_triggered_update) + ripng->t_triggered_update = + thread_add_event (master, ripng_triggered_update, NULL, 0); + break; + default: + break; + } +} + +/* Each route type's strings and default preference. */ +struct +{ + int key; + char *str; + char *str_long; + int distance; +} route_info[] = +{ + { ZEBRA_ROUTE_SYSTEM, "X", "system", 10}, + { ZEBRA_ROUTE_KERNEL, "K", "kernel", 20}, + { ZEBRA_ROUTE_CONNECT, "C", "connected", 30}, + { ZEBRA_ROUTE_STATIC, "S", "static", 40}, + { ZEBRA_ROUTE_RIP, "R", "rip", 50}, + { ZEBRA_ROUTE_RIPNG, "R", "ripng", 50}, + { ZEBRA_ROUTE_OSPF, "O", "ospf", 60}, + { ZEBRA_ROUTE_OSPF6, "O", "ospf6", 60}, + { ZEBRA_ROUTE_BGP, "B", "bgp", 70}, +}; + +/* For messages. */ +struct message ripng_route_info[] = +{ + { RIPNG_ROUTE_RTE, " "}, + { RIPNG_ROUTE_STATIC, "S"}, + { RIPNG_ROUTE_AGGREGATE, "a"} +}; + +/* Print out routes update time. */ +static void +ripng_vty_out_uptime (struct vty *vty, struct ripng_info *rinfo) +{ + struct timeval timer_now; + time_t clock; + struct tm *tm; +#define TIME_BUF 25 + char timebuf [TIME_BUF]; + struct thread *thread; + + gettimeofday (&timer_now, NULL); + + if ((thread = rinfo->t_timeout) != NULL) + { + clock = thread->u.sands.tv_sec - timer_now.tv_sec; + tm = gmtime (&clock); + strftime (timebuf, TIME_BUF, "%M:%S", tm); + vty_out (vty, "%5s", timebuf); + } + else if ((thread = rinfo->t_garbage_collect) != NULL) + { + clock = thread->u.sands.tv_sec - timer_now.tv_sec; + tm = gmtime (&clock); + strftime (timebuf, TIME_BUF, "%M:%S", tm); + vty_out (vty, "%5s", timebuf); + } +} + +DEFUN (show_ipv6_ripng, + show_ipv6_ripng_cmd, + "show ipv6 ripng", + SHOW_STR + IP_STR + "Show RIPng routes\n") +{ + struct route_node *rp; + struct ripng_info *rinfo; + struct ripng_aggregate *aggregate; + struct prefix_ipv6 *p; + int len; + + /* Header of display. */ + vty_out (vty, "%sCodes: R - RIPng%s%s" + " Network " + "Next Hop If Met Tag Time%s", VTY_NEWLINE, + VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE); + + for (rp = route_top (ripng->table); rp; rp = route_next (rp)) + { + if ((aggregate = rp->aggregate) != NULL) + { + p = (struct prefix_ipv6 *) &rp->p; + +#ifdef DEBUG + len = vty_out (vty, "Ra %d/%d %s/%d ", + aggregate->count, aggregate->suppress, + inet6_ntop (&p->prefix), p->prefixlen); +#else + len = vty_out (vty, "Ra %s/%d ", + inet6_ntop (&p->prefix), p->prefixlen); +#endif /* DEBUG */ + + len = 37 - len; + if (len > 0) + vty_out (vty, "%*s", len, " "); + + vty_out (vty, "%*s", 26, " "); + vty_out (vty, "%4d %3d%s", aggregate->metric, + aggregate->tag, + VTY_NEWLINE); + } + + if ((rinfo = rp->info) != NULL) + { + p = (struct prefix_ipv6 *) &rp->p; + +#ifdef DEBUG + len = vty_out (vty, "%s%s 0/%d %s/%d ", + route_info[rinfo->type].str, + rinfo->suppress ? "s" : " ", + rinfo->suppress, + inet6_ntop (&p->prefix), p->prefixlen); +#else + len = vty_out (vty, "%s%s %s/%d ", + route_info[rinfo->type].str, + rinfo->suppress ? "s" : " ", + inet6_ntop (&p->prefix), p->prefixlen); +#endif /* DEBUG */ + len = 37 - len; + if (len > 0) + vty_out (vty, "%*s", len, " "); + + len = vty_out (vty, "%s", inet6_ntop (&rinfo->nexthop)); + + len = 26 - len; + if (len > 0) + vty_out (vty, "%*s", len, " "); + + vty_out (vty, "%2d %2d %3d ", + rinfo->ifindex, rinfo->metric, rinfo->tag); + + if (rinfo->sub_type == RIPNG_ROUTE_RTE) + ripng_vty_out_uptime (vty, rinfo); + + vty_out (vty, "%s", VTY_NEWLINE); + } + } + + return CMD_SUCCESS; +} + +DEFUN (router_ripng, + router_ripng_cmd, + "router ripng", + "Enable a routing process\n" + "Make RIPng instance command\n") +{ + int ret; + + vty->node = RIPNG_NODE; + + if (!ripng) + { + ret = ripng_create (); + + /* Notice to user we couldn't create RIPng. */ + if (ret < 0) + { + zlog_warn ("can't create RIPng"); + return CMD_WARNING; + } + } + + return CMD_SUCCESS; +} + +DEFUN (ripng_route, + ripng_route_cmd, + "route IPV6ADDR", + "Static route setup\n" + "Set static RIPng route announcement\n") +{ + int ret; + struct prefix_ipv6 p; + struct route_node *rp; + + ret = str2prefix_ipv6 (argv[0], (struct prefix_ipv6 *)&p); + if (ret <= 0) + { + vty_out (vty, "Malformed address%s", VTY_NEWLINE); + return CMD_WARNING; + } + apply_mask_ipv6 (&p); + + rp = route_node_get (ripng->route, (struct prefix *) &p); + if (rp->info) + { + vty_out (vty, "There is already same static route.%s", VTY_NEWLINE); + route_unlock_node (rp); + return CMD_WARNING; + } + rp->info = (void *)1; + + ripng_redistribute_add (ZEBRA_ROUTE_RIPNG, RIPNG_ROUTE_STATIC, &p, 0); + + return CMD_SUCCESS; +} + +DEFUN (no_ripng_route, + no_ripng_route_cmd, + "no route IPV6ADDR", + NO_STR + "Static route setup\n" + "Delete static RIPng route announcement\n") +{ + int ret; + struct prefix_ipv6 p; + struct route_node *rp; + + ret = str2prefix_ipv6 (argv[0], (struct prefix_ipv6 *)&p); + if (ret <= 0) + { + vty_out (vty, "Malformed address%s", VTY_NEWLINE); + return CMD_WARNING; + } + apply_mask_ipv6 (&p); + + rp = route_node_lookup (ripng->route, (struct prefix *) &p); + if (! rp) + { + vty_out (vty, "Can't find static route.%s", VTY_NEWLINE); + return CMD_WARNING; + } + + ripng_redistribute_delete (ZEBRA_ROUTE_RIPNG, RIPNG_ROUTE_STATIC, &p, 0); + route_unlock_node (rp); + + rp->info = NULL; + route_unlock_node (rp); + + return CMD_SUCCESS; +} + +DEFUN (ripng_aggregate_address, + ripng_aggregate_address_cmd, + "aggregate-address X:X::X:X/M", + "Set aggregate RIPng route announcement\n" + "Aggregate network\n") +{ + int ret; + struct prefix p; + struct route_node *node; + + ret = str2prefix_ipv6 (argv[0], (struct prefix_ipv6 *)&p); + if (ret <= 0) + { + vty_out (vty, "Malformed address%s", VTY_NEWLINE); + return CMD_WARNING; + } + + /* Check aggregate alredy exist or not. */ + node = route_node_get (ripng->aggregate, &p); + if (node->info) + { + vty_out (vty, "There is already same aggregate route.%s", VTY_NEWLINE); + route_unlock_node (node); + return CMD_WARNING; + } + node->info = (void *)1; + + ripng_aggregate_add (&p); + + return CMD_SUCCESS; +} + +DEFUN (no_ripng_aggregate_address, + no_ripng_aggregate_address_cmd, + "no aggregate-address X:X::X:X/M", + NO_STR + "Delete aggregate RIPng route announcement\n" + "Aggregate network") +{ + int ret; + struct prefix p; + struct route_node *rn; + + ret = str2prefix_ipv6 (argv[0], (struct prefix_ipv6 *) &p); + if (ret <= 0) + { + vty_out (vty, "Malformed address%s", VTY_NEWLINE); + return CMD_WARNING; + } + + rn = route_node_lookup (ripng->aggregate, &p); + if (! rn) + { + vty_out (vty, "Can't find aggregate route.%s", VTY_NEWLINE); + return CMD_WARNING; + } + route_unlock_node (rn); + rn->info = NULL; + route_unlock_node (rn); + + ripng_aggregate_delete (&p); + + return CMD_SUCCESS; +} + +DEFUN (ripng_default_metric, + ripng_default_metric_cmd, + "default-metric <1-16>", + "Set a metric of redistribute routes\n" + "Default metric\n") +{ + if (ripng) + { + ripng->default_metric = atoi (argv[0]); + } + return CMD_SUCCESS; +} + +DEFUN (no_ripng_default_metric, + no_ripng_default_metric_cmd, + "no default-metric", + NO_STR + "Set a metric of redistribute routes\n" + "Default metric\n") +{ + if (ripng) + { + ripng->default_metric = RIPNG_DEFAULT_METRIC_DEFAULT; + } + return CMD_SUCCESS; +} + +ALIAS (no_ripng_default_metric, + no_ripng_default_metric_val_cmd, + "no default-metric <1-16>", + NO_STR + "Set a metric of redistribute routes\n" + "Default metric\n") + +#if 0 +/* RIPng update timer setup. */ +DEFUN (ripng_update_timer, + ripng_update_timer_cmd, + "update-timer SECOND", + "Set RIPng update timer in seconds\n" + "Seconds\n") +{ + unsigned long update; + char *endptr = NULL; + + update = strtoul (argv[0], &endptr, 10); + if (update == ULONG_MAX || *endptr != '\0') + { + vty_out (vty, "update timer value error%s", VTY_NEWLINE); + return CMD_WARNING; + } + + ripng->update_time = update; + + ripng_event (RIPNG_UPDATE_EVENT, 0); + return CMD_SUCCESS; +} + +DEFUN (no_ripng_update_timer, + no_ripng_update_timer_cmd, + "no update-timer SECOND", + NO_STR + "Unset RIPng update timer in seconds\n" + "Seconds\n") +{ + ripng->update_time = RIPNG_UPDATE_TIMER_DEFAULT; + ripng_event (RIPNG_UPDATE_EVENT, 0); + return CMD_SUCCESS; +} + +/* RIPng timeout timer setup. */ +DEFUN (ripng_timeout_timer, + ripng_timeout_timer_cmd, + "timeout-timer SECOND", + "Set RIPng timeout timer in seconds\n" + "Seconds\n") +{ + unsigned long timeout; + char *endptr = NULL; + + timeout = strtoul (argv[0], &endptr, 10); + if (timeout == ULONG_MAX || *endptr != '\0') + { + vty_out (vty, "timeout timer value error%s", VTY_NEWLINE); + return CMD_WARNING; + } + + ripng->timeout_time = timeout; + + return CMD_SUCCESS; +} + +DEFUN (no_ripng_timeout_timer, + no_ripng_timeout_timer_cmd, + "no timeout-timer SECOND", + NO_STR + "Unset RIPng timeout timer in seconds\n" + "Seconds\n") +{ + ripng->timeout_time = RIPNG_TIMEOUT_TIMER_DEFAULT; + return CMD_SUCCESS; +} + +/* RIPng garbage timer setup. */ +DEFUN (ripng_garbage_timer, + ripng_garbage_timer_cmd, + "garbage-timer SECOND", + "Set RIPng garbage timer in seconds\n" + "Seconds\n") +{ + unsigned long garbage; + char *endptr = NULL; + + garbage = strtoul (argv[0], &endptr, 10); + if (garbage == ULONG_MAX || *endptr != '\0') + { + vty_out (vty, "garbage timer value error%s", VTY_NEWLINE); + return CMD_WARNING; + } + + ripng->garbage_time = garbage; + + return CMD_SUCCESS; +} + +DEFUN (no_ripng_garbage_timer, + no_ripng_garbage_timer_cmd, + "no garbage-timer SECOND", + NO_STR + "Unset RIPng garbage timer in seconds\n" + "Seconds\n") +{ + ripng->garbage_time = RIPNG_GARBAGE_TIMER_DEFAULT; + return CMD_SUCCESS; +} +#endif /* 0 */ + +DEFUN (ripng_timers, + ripng_timers_cmd, + "timers basic <0-65535> <0-65535> <0-65535>", + "RIPng timers setup\n" + "Basic timer\n" + "Routing table update timer value in second. Default is 30.\n" + "Routing information timeout timer. Default is 180.\n" + "Garbage collection timer. Default is 120.\n") +{ + unsigned long update; + unsigned long timeout; + unsigned long garbage; + char *endptr = NULL; + + update = strtoul (argv[0], &endptr, 10); + if (update == ULONG_MAX || *endptr != '\0') + { + vty_out (vty, "update timer value error%s", VTY_NEWLINE); + return CMD_WARNING; + } + + timeout = strtoul (argv[1], &endptr, 10); + if (timeout == ULONG_MAX || *endptr != '\0') + { + vty_out (vty, "timeout timer value error%s", VTY_NEWLINE); + return CMD_WARNING; + } + + garbage = strtoul (argv[2], &endptr, 10); + if (garbage == ULONG_MAX || *endptr != '\0') + { + vty_out (vty, "garbage timer value error%s", VTY_NEWLINE); + return CMD_WARNING; + } + + /* Set each timer value. */ + ripng->update_time = update; + ripng->timeout_time = timeout; + ripng->garbage_time = garbage; + + /* Reset update timer thread. */ + ripng_event (RIPNG_UPDATE_EVENT, 0); + + return CMD_SUCCESS; +} + +DEFUN (no_ripng_timers, + no_ripng_timers_cmd, + "no timers basic", + NO_STR + "RIPng timers setup\n" + "Basic timer\n") +{ + /* Set each timer value to the default. */ + ripng->update_time = RIPNG_UPDATE_TIMER_DEFAULT; + ripng->timeout_time = RIPNG_TIMEOUT_TIMER_DEFAULT; + ripng->garbage_time = RIPNG_GARBAGE_TIMER_DEFAULT; + + /* Reset update timer thread. */ + ripng_event (RIPNG_UPDATE_EVENT, 0); + + return CMD_SUCCESS; +} + + +DEFUN (show_ipv6_protocols, show_ipv6_protocols_cmd, + "show ipv6 protocols", + SHOW_STR + IP_STR + "Routing protocol information") +{ + if (! ripng) + return CMD_SUCCESS; + + vty_out (vty, "Routing Protocol is \"ripng\"%s", VTY_NEWLINE); + + vty_out (vty, "Sending updates every %ld seconds, next due in %d seconds%s", + ripng->update_time, 0, + VTY_NEWLINE); + + vty_out (vty, "Timerout after %ld seconds, garbage correct %ld%s", + ripng->timeout_time, + ripng->garbage_time, + VTY_NEWLINE); + + vty_out (vty, "Outgoing update filter list for all interfaces is not set"); + vty_out (vty, "Incoming update filter list for all interfaces is not set"); + + return CMD_SUCCESS; +} + +/* Please be carefull to use this command. */ +DEFUN (default_information_originate, + default_information_originate_cmd, + "default-information originate", + "Default route information\n" + "Distribute default route\n") +{ + struct prefix_ipv6 p; + + ripng->default_information = 1; + + str2prefix_ipv6 ("::/0", &p); + ripng_redistribute_add (ZEBRA_ROUTE_RIPNG, RIPNG_ROUTE_STATIC, &p, 0); + + return CMD_SUCCESS; +} + +DEFUN (no_default_information_originate, + no_default_information_originate_cmd, + "no default-information originate", + NO_STR + "Default route information\n" + "Distribute default route\n") +{ + struct prefix_ipv6 p; + + ripng->default_information = 0; + + str2prefix_ipv6 ("::/0", &p); + ripng_redistribute_delete (ZEBRA_ROUTE_RIPNG, RIPNG_ROUTE_STATIC, &p, 0); + + return CMD_SUCCESS; +} + +/* RIPng configuration write function. */ +int +ripng_config_write (struct vty *vty) +{ + int ripng_network_write (struct vty *); + void ripng_redistribute_write (struct vty *); + int write = 0; + struct route_node *rp; + + if (ripng) + { + + /* RIPng router. */ + vty_out (vty, "router ripng%s", VTY_NEWLINE); + + if (ripng->default_information) + vty_out (vty, " default-information originate%s", VTY_NEWLINE); + + ripng_network_write (vty); + + /* RIPng default metric configuration */ + if (ripng->default_metric != RIPNG_DEFAULT_METRIC_DEFAULT) + vty_out (vty, " default-metric %d%s", + ripng->default_metric, VTY_NEWLINE); + + ripng_redistribute_write (vty); + + /* RIPng aggregate routes. */ + for (rp = route_top (ripng->aggregate); rp; rp = route_next (rp)) + if (rp->info != NULL) + vty_out (vty, " aggregate-address %s/%d%s", + inet6_ntop (&rp->p.u.prefix6), + rp->p.prefixlen, + + VTY_NEWLINE); + + /* RIPng static routes. */ + for (rp = route_top (ripng->route); rp; rp = route_next (rp)) + if (rp->info != NULL) + vty_out (vty, " route %s/%d%s", inet6_ntop (&rp->p.u.prefix6), + rp->p.prefixlen, + VTY_NEWLINE); + + /* RIPng timers configuration. */ + if (ripng->update_time != RIPNG_UPDATE_TIMER_DEFAULT || + ripng->timeout_time != RIPNG_TIMEOUT_TIMER_DEFAULT || + ripng->garbage_time != RIPNG_GARBAGE_TIMER_DEFAULT) + { + vty_out (vty, " timers basic %ld %ld %ld%s", + ripng->update_time, + ripng->timeout_time, + ripng->garbage_time, + VTY_NEWLINE); + } +#if 0 + if (ripng->update_time != RIPNG_UPDATE_TIMER_DEFAULT) + vty_out (vty, " update-timer %d%s", ripng->update_time, + VTY_NEWLINE); + if (ripng->timeout_time != RIPNG_TIMEOUT_TIMER_DEFAULT) + vty_out (vty, " timeout-timer %d%s", ripng->timeout_time, + VTY_NEWLINE); + if (ripng->garbage_time != RIPNG_GARBAGE_TIMER_DEFAULT) + vty_out (vty, " garbage-timer %d%s", ripng->garbage_time, + VTY_NEWLINE); +#endif /* 0 */ + + write += config_write_distribute (vty); + + write += config_write_if_rmap (vty); + + write++; + } + return write; +} + +/* RIPng node structure. */ +struct cmd_node cmd_ripng_node = +{ + RIPNG_NODE, + "%s(config-router)# ", + 1, +}; + +void +ripng_distribute_update (struct distribute *dist) +{ + struct interface *ifp; + struct ripng_interface *ri; + struct access_list *alist; + struct prefix_list *plist; + + if (! dist->ifname) + return; + + ifp = if_lookup_by_name (dist->ifname); + if (ifp == NULL) + return; + + ri = ifp->info; + + if (dist->list[DISTRIBUTE_IN]) + { + alist = access_list_lookup (AFI_IP6, dist->list[DISTRIBUTE_IN]); + if (alist) + ri->list[RIPNG_FILTER_IN] = alist; + else + ri->list[RIPNG_FILTER_IN] = NULL; + } + else + ri->list[RIPNG_FILTER_IN] = NULL; + + if (dist->list[DISTRIBUTE_OUT]) + { + alist = access_list_lookup (AFI_IP6, dist->list[DISTRIBUTE_OUT]); + if (alist) + ri->list[RIPNG_FILTER_OUT] = alist; + else + ri->list[RIPNG_FILTER_OUT] = NULL; + } + else + ri->list[RIPNG_FILTER_OUT] = NULL; + + if (dist->prefix[DISTRIBUTE_IN]) + { + plist = prefix_list_lookup (AFI_IP6, dist->prefix[DISTRIBUTE_IN]); + if (plist) + ri->prefix[RIPNG_FILTER_IN] = plist; + else + ri->prefix[RIPNG_FILTER_IN] = NULL; + } + else + ri->prefix[RIPNG_FILTER_IN] = NULL; + + if (dist->prefix[DISTRIBUTE_OUT]) + { + plist = prefix_list_lookup (AFI_IP6, dist->prefix[DISTRIBUTE_OUT]); + if (plist) + ri->prefix[RIPNG_FILTER_OUT] = plist; + else + ri->prefix[RIPNG_FILTER_OUT] = NULL; + } + else + ri->prefix[RIPNG_FILTER_OUT] = NULL; +} +void +ripng_distribute_update_interface (struct interface *ifp) +{ + struct distribute *dist; + + dist = distribute_lookup (ifp->name); + if (dist) + ripng_distribute_update (dist); +} + +/* Update all interface's distribute list. */ +void +ripng_distribute_update_all () +{ + struct interface *ifp; + listnode node; + + for (node = listhead (iflist); node; nextnode (node)) + { + ifp = getdata (node); + ripng_distribute_update_interface (ifp); + } +} + +void +ripng_if_rmap_update (struct if_rmap *if_rmap) +{ + struct interface *ifp; + struct ripng_interface *ri; + struct route_map *rmap; + + ifp = if_lookup_by_name (if_rmap->ifname); + if (ifp == NULL) + return; + + ri = ifp->info; + + if (if_rmap->routemap[IF_RMAP_IN]) + { + rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_IN]); + if (rmap) + ri->routemap[IF_RMAP_IN] = rmap; + else + ri->routemap[IF_RMAP_IN] = NULL; + } + else + ri->routemap[RIPNG_FILTER_IN] = NULL; + + if (if_rmap->routemap[IF_RMAP_OUT]) + { + rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_OUT]); + if (rmap) + ri->routemap[IF_RMAP_OUT] = rmap; + else + ri->routemap[IF_RMAP_OUT] = NULL; + } + else + ri->routemap[RIPNG_FILTER_OUT] = NULL; +} + +void +ripng_if_rmap_update_interface (struct interface *ifp) +{ + struct if_rmap *if_rmap; + + if_rmap = if_rmap_lookup (ifp->name); + if (if_rmap) + ripng_if_rmap_update (if_rmap); +} + +void +ripng_routemap_update_redistribute (void) +{ + int i; + + if (ripng) + { + for (i = 0; i < ZEBRA_ROUTE_MAX; i++) + { + if (ripng->route_map[i].name) + ripng->route_map[i].map = + route_map_lookup_by_name (ripng->route_map[i].name); + } + } +} + +void +ripng_routemap_update () +{ + struct interface *ifp; + listnode node; + + for (node = listhead (iflist); node; nextnode (node)) + { + ifp = getdata (node); + ripng_if_rmap_update_interface (ifp); + } + + ripng_routemap_update_redistribute (); +} + +/* Initialize ripng structure and set commands. */ +void +ripng_init () +{ + /* Randomize. */ + srand (time (NULL)); + + /* Install RIPNG_NODE. */ + install_node (&cmd_ripng_node, ripng_config_write); + + /* Install ripng commands. */ + install_element (VIEW_NODE, &show_ipv6_ripng_cmd); + + install_element (ENABLE_NODE, &show_ipv6_ripng_cmd); + + install_element (CONFIG_NODE, &router_ripng_cmd); + + install_default (RIPNG_NODE); + install_element (RIPNG_NODE, &ripng_route_cmd); + install_element (RIPNG_NODE, &no_ripng_route_cmd); + install_element (RIPNG_NODE, &ripng_aggregate_address_cmd); + install_element (RIPNG_NODE, &no_ripng_aggregate_address_cmd); + + install_element (RIPNG_NODE, &ripng_default_metric_cmd); + install_element (RIPNG_NODE, &no_ripng_default_metric_cmd); + install_element (RIPNG_NODE, &no_ripng_default_metric_val_cmd); + + install_element (RIPNG_NODE, &ripng_timers_cmd); + install_element (RIPNG_NODE, &no_ripng_timers_cmd); +#if 0 + install_element (RIPNG_NODE, &ripng_update_timer_cmd); + install_element (RIPNG_NODE, &no_ripng_update_timer_cmd); + install_element (RIPNG_NODE, &ripng_timeout_timer_cmd); + install_element (RIPNG_NODE, &no_ripng_timeout_timer_cmd); + install_element (RIPNG_NODE, &ripng_garbage_timer_cmd); + install_element (RIPNG_NODE, &no_ripng_garbage_timer_cmd); +#endif /* 0 */ + + install_element (RIPNG_NODE, &default_information_originate_cmd); + install_element (RIPNG_NODE, &no_default_information_originate_cmd); + + ripng_if_init (); + ripng_debug_init (); + + /* Access list install. */ + access_list_init (); + access_list_add_hook (ripng_distribute_update_all); + access_list_delete_hook (ripng_distribute_update_all); + + /* Prefix list initialize.*/ + prefix_list_init (); + prefix_list_add_hook (ripng_distribute_update_all); + prefix_list_delete_hook (ripng_distribute_update_all); + + /* Distribute list install. */ + distribute_list_init (RIPNG_NODE); + distribute_list_add_hook (ripng_distribute_update); + distribute_list_delete_hook (ripng_distribute_update); + + /* Route-map for interface. */ + ripng_route_map_init (); + route_map_add_hook (ripng_routemap_update); + route_map_delete_hook (ripng_routemap_update); + + if_rmap_init (RIPNG_NODE); + if_rmap_hook_add (ripng_if_rmap_update); + if_rmap_hook_delete (ripng_if_rmap_update); +} |