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- /*
- * Interface related function for RIPng.
- * Copyright (C) 1998 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 "linklist.h"
- #include "if.h"
- #include "prefix.h"
- #include "memory.h"
- #include "network.h"
- #include "filter.h"
- #include "log.h"
- #include "stream.h"
- #include "zclient.h"
- #include "command.h"
- #include "table.h"
- #include "thread.h"
- #include "privs.h"
- #include "ripngd/ripngd.h"
- #include "ripngd/ripng_debug.h"
- /* 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
- extern struct zebra_privs_t ripngd_privs;
- /* Static utility function. */
- static void ripng_enable_apply (struct interface *);
- static void ripng_passive_interface_apply (struct interface *);
- static int ripng_enable_if_lookup (const char *);
- static int ripng_enable_network_lookup2 (struct connected *);
- static void ripng_enable_apply_all (void);
- /* Join to the all rip routers multicast group. */
- static int
- ripng_multicast_join (struct interface *ifp)
- {
- int ret;
- struct ipv6_mreq mreq;
- int save_errno;
- if (if_is_up (ifp) && if_is_multicast (ifp)) {
- memset (&mreq, 0, sizeof (mreq));
- inet_pton(AF_INET6, RIPNG_GROUP, &mreq.ipv6mr_multiaddr);
- mreq.ipv6mr_interface = ifp->ifindex;
- /*
- * NetBSD 1.6.2 requires root to join groups on gif(4).
- * While this is bogus, privs are available and easy to use
- * for this call as a workaround.
- */
- if (ripngd_privs.change (ZPRIVS_RAISE))
- zlog_err ("ripng_multicast_join: could not raise privs");
- ret = setsockopt (ripng->sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
- (char *) &mreq, sizeof (mreq));
- save_errno = errno;
- if (ripngd_privs.change (ZPRIVS_LOWER))
- zlog_err ("ripng_multicast_join: could not lower privs");
- if (ret < 0 && save_errno == EADDRINUSE)
- {
- /*
- * Group is already joined. This occurs due to sloppy group
- * management, in particular declining to leave the group on
- * an interface that has just gone down.
- */
- zlog_warn ("ripng join on %s EADDRINUSE (ignoring)\n", ifp->name);
- return 0; /* not an error */
- }
- if (ret < 0)
- zlog_warn ("can't setsockopt IPV6_JOIN_GROUP: %s",
- safe_strerror (save_errno));
- if (IS_RIPNG_DEBUG_EVENT)
- zlog_debug ("RIPng %s join to all-rip-routers multicast group", ifp->name);
- if (ret < 0)
- return -1;
- }
- return 0;
- }
- /* Leave from the all rip routers multicast group. */
- static int
- ripng_multicast_leave (struct interface *ifp)
- {
- int ret;
- struct ipv6_mreq mreq;
- if (if_is_up (ifp) && if_is_multicast (ifp)) {
- memset (&mreq, 0, sizeof (mreq));
- inet_pton(AF_INET6, RIPNG_GROUP, &mreq.ipv6mr_multiaddr);
- mreq.ipv6mr_interface = ifp->ifindex;
- ret = setsockopt (ripng->sock, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
- (char *) &mreq, sizeof (mreq));
- if (ret < 0)
- zlog_warn ("can't setsockopt IPV6_LEAVE_GROUP: %s\n", safe_strerror (errno));
- if (IS_RIPNG_DEBUG_EVENT)
- zlog_debug ("RIPng %s leave from all-rip-routers multicast group",
- ifp->name);
- if (ret < 0)
- return -1;
- }
- return 0;
- }
- /* How many link local IPv6 address could be used on the interface ? */
- static int
- ripng_if_ipv6_lladdress_check (struct interface *ifp)
- {
- struct listnode *nn;
- struct connected *connected;
- int count = 0;
- for (ALL_LIST_ELEMENTS_RO (ifp->connected, nn, connected))
- {
- struct prefix *p;
- p = connected->address;
- if ((p->family == AF_INET6) &&
- IN6_IS_ADDR_LINKLOCAL (&p->u.prefix6))
- count++;
- }
- return count;
- }
- /* Check max mtu size. */
- static unsigned int
- ripng_check_max_mtu (void)
- {
- struct listnode *node;
- struct interface *ifp;
- unsigned int mtu;
- mtu = 0;
- for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp))
- if (mtu < ifp->mtu6)
- mtu = ifp->mtu6;
- return mtu;
- }
- static int
- ripng_if_down (struct interface *ifp)
- {
- struct route_node *rp;
- struct ripng_info *rinfo;
- struct ripng_interface *ri;
- if (ripng)
- {
- for (rp = route_top (ripng->table); rp; rp = route_next (rp))
- if ((rinfo = rp->info) != NULL)
- {
- /* Routes got through this interface. */
- if (rinfo->ifindex == ifp->ifindex
- && rinfo->type == ZEBRA_ROUTE_RIPNG
- && rinfo->sub_type == RIPNG_ROUTE_RTE)
- {
- ripng_zebra_ipv6_delete ((struct prefix_ipv6 *) &rp->p,
- &rinfo->nexthop,
- rinfo->ifindex);
- ripng_redistribute_delete (rinfo->type, rinfo->sub_type,
- (struct prefix_ipv6 *)&rp->p,
- rinfo->ifindex);
- }
- else
- {
- /* All redistributed routes got through this interface,
- * but the static and system ones are kept. */
- if ((rinfo->ifindex == ifp->ifindex) &&
- (rinfo->type != ZEBRA_ROUTE_STATIC) &&
- (rinfo->type != ZEBRA_ROUTE_SYSTEM))
- ripng_redistribute_delete (rinfo->type, rinfo->sub_type,
- (struct prefix_ipv6 *) &rp->p,
- rinfo->ifindex);
- }
- }
- }
- ri = ifp->info;
-
- if (ri->running)
- {
- if (IS_RIPNG_DEBUG_EVENT)
- zlog_debug ("turn off %s", ifp->name);
- /* Leave from multicast group. */
- ripng_multicast_leave (ifp);
- ri->running = 0;
- }
- return 0;
- }
- /* Inteface link up message processing. */
- int
- ripng_interface_up (int command, struct zclient *zclient, zebra_size_t length)
- {
- struct stream *s;
- struct interface *ifp;
- /* zebra_interface_state_read() updates interface structure in iflist. */
- s = zclient->ibuf;
- ifp = zebra_interface_state_read (s);
- if (ifp == NULL)
- return 0;
- if (IS_RIPNG_DEBUG_ZEBRA)
- zlog_debug ("interface up %s index %d flags %ld metric %d mtu %d",
- ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu6);
- /* Check if this interface is RIPng enabled or not. */
- ripng_enable_apply (ifp);
- /* Check for a passive interface. */
- ripng_passive_interface_apply (ifp);
- /* Apply distribute list to the all interface. */
- ripng_distribute_update_interface (ifp);
- return 0;
- }
- /* Inteface link down message processing. */
- int
- ripng_interface_down (int command, struct zclient *zclient,
- zebra_size_t length)
- {
- struct stream *s;
- struct interface *ifp;
- /* zebra_interface_state_read() updates interface structure in iflist. */
- s = zclient->ibuf;
- ifp = zebra_interface_state_read (s);
- if (ifp == NULL)
- return 0;
- ripng_if_down (ifp);
- if (IS_RIPNG_DEBUG_ZEBRA)
- zlog_debug ("interface down %s index %d flags %ld metric %d mtu %d",
- ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu6);
- return 0;
- }
- /* Inteface addition message from zebra. */
- int
- ripng_interface_add (int command, struct zclient *zclient, zebra_size_t length)
- {
- struct interface *ifp;
- ifp = zebra_interface_add_read (zclient->ibuf);
- if (IS_RIPNG_DEBUG_ZEBRA)
- zlog_debug ("RIPng interface add %s index %d flags %ld metric %d mtu %d",
- ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu6);
- /* Check is this interface is RIP enabled or not.*/
- ripng_enable_apply (ifp);
- /* Apply distribute list to the interface. */
- ripng_distribute_update_interface (ifp);
- /* Check interface routemap. */
- ripng_if_rmap_update_interface (ifp);
- return 0;
- }
- int
- ripng_interface_delete (int command, struct zclient *zclient,
- zebra_size_t length)
- {
- struct interface *ifp;
- struct stream *s;
- s = zclient->ibuf;
- /* zebra_interface_state_read() updates interface structure in iflist */
- ifp = zebra_interface_state_read(s);
- if (ifp == NULL)
- return 0;
- if (if_is_up (ifp)) {
- ripng_if_down(ifp);
- }
- zlog_info("interface delete %s index %d flags %ld metric %d mtu %d",
- ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu6);
- /* To support pseudo interface do not free interface structure. */
- /* if_delete(ifp); */
- ifp->ifindex = IFINDEX_INTERNAL;
- return 0;
- }
- void
- ripng_interface_clean (void)
- {
- struct listnode *node, *nnode;
- struct interface *ifp;
- struct ripng_interface *ri;
- for (ALL_LIST_ELEMENTS (iflist, node, nnode, ifp))
- {
- ri = ifp->info;
- ri->enable_network = 0;
- ri->enable_interface = 0;
- ri->running = 0;
- if (ri->t_wakeup)
- {
- thread_cancel (ri->t_wakeup);
- ri->t_wakeup = NULL;
- }
- }
- }
- void
- ripng_interface_reset (void)
- {
- struct listnode *node;
- struct interface *ifp;
- struct ripng_interface *ri;
- for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp))
- {
- ri = ifp->info;
- ri->enable_network = 0;
- ri->enable_interface = 0;
- ri->running = 0;
- ri->split_horizon = RIPNG_NO_SPLIT_HORIZON;
- ri->split_horizon_default = RIPNG_NO_SPLIT_HORIZON;
- ri->list[RIPNG_FILTER_IN] = NULL;
- ri->list[RIPNG_FILTER_OUT] = NULL;
- ri->prefix[RIPNG_FILTER_IN] = NULL;
- ri->prefix[RIPNG_FILTER_OUT] = NULL;
- if (ri->t_wakeup)
- {
- thread_cancel (ri->t_wakeup);
- ri->t_wakeup = NULL;
- }
- ri->passive = 0;
- }
- }
- static void
- ripng_apply_address_add (struct connected *ifc) {
- struct prefix_ipv6 address;
- struct prefix *p;
- if (!ripng)
- return;
- if (! if_is_up(ifc->ifp))
- return;
- p = ifc->address;
- memset (&address, 0, sizeof (address));
- address.family = p->family;
- address.prefix = p->u.prefix6;
- address.prefixlen = p->prefixlen;
- apply_mask_ipv6(&address);
- /* Check if this interface is RIP enabled or not
- or Check if this address's prefix is RIP enabled */
- if ((ripng_enable_if_lookup(ifc->ifp->name) >= 0) ||
- (ripng_enable_network_lookup2(ifc) >= 0))
- ripng_redistribute_add(ZEBRA_ROUTE_CONNECT, RIPNG_ROUTE_INTERFACE,
- &address, ifc->ifp->ifindex, NULL);
- }
- int
- ripng_interface_address_add (int command, struct zclient *zclient,
- zebra_size_t length)
- {
- struct connected *c;
- struct prefix *p;
- c = zebra_interface_address_read (ZEBRA_INTERFACE_ADDRESS_ADD,
- zclient->ibuf);
- if (c == NULL)
- return 0;
- p = c->address;
- if (p->family == AF_INET6)
- {
- struct ripng_interface *ri = c->ifp->info;
-
- if (IS_RIPNG_DEBUG_ZEBRA)
- zlog_debug ("RIPng connected address %s/%d add",
- inet6_ntoa(p->u.prefix6),
- p->prefixlen);
-
- /* Check is this prefix needs to be redistributed. */
- ripng_apply_address_add(c);
- /* Let's try once again whether the interface could be activated */
- if (!ri->running) {
- /* Check if this interface is RIP enabled or not.*/
- ripng_enable_apply (c->ifp);
- /* Apply distribute list to the interface. */
- ripng_distribute_update_interface (c->ifp);
- /* Check interface routemap. */
- ripng_if_rmap_update_interface (c->ifp);
- }
- }
- return 0;
- }
- static void
- ripng_apply_address_del (struct connected *ifc) {
- struct prefix_ipv6 address;
- struct prefix *p;
- if (!ripng)
- return;
- if (! if_is_up(ifc->ifp))
- return;
- p = ifc->address;
- memset (&address, 0, sizeof (address));
- address.family = p->family;
- address.prefix = p->u.prefix6;
- address.prefixlen = p->prefixlen;
- apply_mask_ipv6(&address);
- ripng_redistribute_delete(ZEBRA_ROUTE_CONNECT, RIPNG_ROUTE_INTERFACE,
- &address, ifc->ifp->ifindex);
- }
- int
- ripng_interface_address_delete (int command, struct zclient *zclient,
- zebra_size_t length)
- {
- struct connected *ifc;
- struct prefix *p;
- char buf[INET6_ADDRSTRLEN];
- ifc = zebra_interface_address_read (ZEBRA_INTERFACE_ADDRESS_DELETE,
- zclient->ibuf);
-
- if (ifc)
- {
- p = ifc->address;
- if (p->family == AF_INET6)
- {
- if (IS_RIPNG_DEBUG_ZEBRA)
- zlog_debug ("RIPng connected address %s/%d delete",
- inet_ntop (AF_INET6, &p->u.prefix6, buf,
- INET6_ADDRSTRLEN),
- p->prefixlen);
- /* Check wether this prefix needs to be removed. */
- ripng_apply_address_del(ifc);
- }
- connected_free (ifc);
- }
- return 0;
- }
- /* RIPng enable interface vector. */
- vector ripng_enable_if;
- /* RIPng enable network table. */
- struct route_table *ripng_enable_network;
- /* Lookup RIPng enable network. */
- /* Check wether the interface has at least a connected prefix that
- * is within the ripng_enable_network table. */
- static int
- ripng_enable_network_lookup_if (struct interface *ifp)
- {
- struct listnode *node;
- struct connected *connected;
- struct prefix_ipv6 address;
- for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, connected))
- {
- struct prefix *p;
- struct route_node *node;
- p = connected->address;
- if (p->family == AF_INET6)
- {
- address.family = AF_INET6;
- address.prefix = p->u.prefix6;
- address.prefixlen = IPV6_MAX_BITLEN;
- node = route_node_match (ripng_enable_network,
- (struct prefix *)&address);
- if (node)
- {
- route_unlock_node (node);
- return 1;
- }
- }
- }
- return -1;
- }
- /* Check wether connected is within the ripng_enable_network table. */
- static int
- ripng_enable_network_lookup2 (struct connected *connected)
- {
- struct prefix_ipv6 address;
- struct prefix *p;
- p = connected->address;
- if (p->family == AF_INET6) {
- struct route_node *node;
- address.family = p->family;
- address.prefix = p->u.prefix6;
- address.prefixlen = IPV6_MAX_BITLEN;
- /* LPM on p->family, p->u.prefix6/IPV6_MAX_BITLEN within ripng_enable_network */
- node = route_node_match (ripng_enable_network,
- (struct prefix *)&address);
- if (node) {
- route_unlock_node (node);
- return 1;
- }
- }
- return -1;
- }
- /* Add RIPng enable network. */
- static int
- ripng_enable_network_add (struct prefix *p)
- {
- struct route_node *node;
- node = route_node_get (ripng_enable_network, p);
- if (node->info)
- {
- route_unlock_node (node);
- return -1;
- }
- else
- node->info = (char *) "enabled";
- /* XXX: One should find a better solution than a generic one */
- ripng_enable_apply_all();
- return 1;
- }
- /* Delete RIPng enable network. */
- static int
- ripng_enable_network_delete (struct prefix *p)
- {
- struct route_node *node;
- node = route_node_lookup (ripng_enable_network, p);
- if (node)
- {
- node->info = NULL;
- /* Unlock info lock. */
- route_unlock_node (node);
- /* Unlock lookup lock. */
- route_unlock_node (node);
- return 1;
- }
- return -1;
- }
- /* Lookup function. */
- static int
- ripng_enable_if_lookup (const char *ifname)
- {
- unsigned int i;
- char *str;
- for (i = 0; i < vector_active (ripng_enable_if); i++)
- if ((str = vector_slot (ripng_enable_if, i)) != NULL)
- if (strcmp (str, ifname) == 0)
- return i;
- return -1;
- }
- /* Add interface to ripng_enable_if. */
- static int
- ripng_enable_if_add (const char *ifname)
- {
- int ret;
- ret = ripng_enable_if_lookup (ifname);
- if (ret >= 0)
- return -1;
- vector_set (ripng_enable_if, strdup (ifname));
- ripng_enable_apply_all();
- return 1;
- }
- /* Delete interface from ripng_enable_if. */
- static int
- ripng_enable_if_delete (const char *ifname)
- {
- int index;
- char *str;
- index = ripng_enable_if_lookup (ifname);
- if (index < 0)
- return -1;
- str = vector_slot (ripng_enable_if, index);
- free (str);
- vector_unset (ripng_enable_if, index);
- ripng_enable_apply_all();
- return 1;
- }
- /* Wake up interface. */
- static int
- ripng_interface_wakeup (struct thread *t)
- {
- struct interface *ifp;
- struct ripng_interface *ri;
- /* Get interface. */
- ifp = THREAD_ARG (t);
- ri = ifp->info;
- ri->t_wakeup = NULL;
- /* Join to multicast group. */
- if (ripng_multicast_join (ifp) < 0) {
- zlog_err ("multicast join failed, interface %s not running", ifp->name);
- return 0;
- }
-
- /* Set running flag. */
- ri->running = 1;
- /* Send RIP request to the interface. */
- ripng_request (ifp);
- return 0;
- }
- static void
- ripng_connect_set (struct interface *ifp, int set)
- {
- struct listnode *node, *nnode;
- struct connected *connected;
- struct prefix_ipv6 address;
- for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, connected))
- {
- struct prefix *p;
- p = connected->address;
- if (p->family != AF_INET6)
- continue;
- address.family = AF_INET6;
- address.prefix = p->u.prefix6;
- address.prefixlen = p->prefixlen;
- apply_mask_ipv6 (&address);
- if (set) {
- /* Check once more wether this prefix is within a "network IF_OR_PREF" one */
- if ((ripng_enable_if_lookup(connected->ifp->name) >= 0) ||
- (ripng_enable_network_lookup2(connected) >= 0))
- ripng_redistribute_add (ZEBRA_ROUTE_CONNECT, RIPNG_ROUTE_INTERFACE,
- &address, connected->ifp->ifindex, NULL);
- } else {
- ripng_redistribute_delete (ZEBRA_ROUTE_CONNECT, RIPNG_ROUTE_INTERFACE,
- &address, connected->ifp->ifindex);
- if (ripng_redistribute_check (ZEBRA_ROUTE_CONNECT))
- ripng_redistribute_add (ZEBRA_ROUTE_CONNECT, RIPNG_ROUTE_REDISTRIBUTE,
- &address, connected->ifp->ifindex, NULL);
- }
- }
- }
- /* Check RIPng is enabed on this interface. */
- void
- ripng_enable_apply (struct interface *ifp)
- {
- int ret;
- struct ripng_interface *ri = NULL;
- /* Check interface. */
- if (! if_is_up (ifp))
- return;
-
- ri = ifp->info;
- /* Is this interface a candidate for RIPng ? */
- ret = ripng_enable_network_lookup_if (ifp);
- /* If the interface is matched. */
- if (ret > 0)
- ri->enable_network = 1;
- else
- ri->enable_network = 0;
- /* Check interface name configuration. */
- ret = ripng_enable_if_lookup (ifp->name);
- if (ret >= 0)
- ri->enable_interface = 1;
- else
- ri->enable_interface = 0;
- /* any candidate interface MUST have a link-local IPv6 address */
- if ((! ripng_if_ipv6_lladdress_check (ifp)) &&
- (ri->enable_network || ri->enable_interface)) {
- ri->enable_network = 0;
- ri->enable_interface = 0;
- zlog_warn("Interface %s does not have any link-local address",
- ifp->name);
- }
- /* Update running status of the interface. */
- if (ri->enable_network || ri->enable_interface)
- {
- {
- if (IS_RIPNG_DEBUG_EVENT)
- zlog_debug ("RIPng turn on %s", ifp->name);
- /* Add interface wake up thread. */
- if (! ri->t_wakeup)
- ri->t_wakeup = thread_add_timer (master, ripng_interface_wakeup,
- ifp, 1);
- ripng_connect_set (ifp, 1);
- }
- }
- else
- {
- if (ri->running)
- {
- /* Might as well clean up the route table as well
- * ripng_if_down sets to 0 ri->running, and displays "turn off %s"
- **/
- ripng_if_down(ifp);
- ripng_connect_set (ifp, 0);
- }
- }
- }
- /* Set distribute list to all interfaces. */
- static void
- ripng_enable_apply_all (void)
- {
- struct interface *ifp;
- struct listnode *node;
- for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp))
- ripng_enable_apply (ifp);
- }
- /* Clear all network and neighbor configuration */
- void
- ripng_clean_network ()
- {
- unsigned int i;
- char *str;
- struct route_node *rn;
- /* ripng_enable_network */
- for (rn = route_top (ripng_enable_network); rn; rn = route_next (rn))
- if (rn->info) {
- rn->info = NULL;
- route_unlock_node(rn);
- }
- /* ripng_enable_if */
- for (i = 0; i < vector_active (ripng_enable_if); i++)
- if ((str = vector_slot (ripng_enable_if, i)) != NULL) {
- free (str);
- vector_slot (ripng_enable_if, i) = NULL;
- }
- }
- /* Vector to store passive-interface name. */
- vector Vripng_passive_interface;
- /* Utility function for looking up passive interface settings. */
- static int
- ripng_passive_interface_lookup (const char *ifname)
- {
- unsigned int i;
- char *str;
- for (i = 0; i < vector_active (Vripng_passive_interface); i++)
- if ((str = vector_slot (Vripng_passive_interface, i)) != NULL)
- if (strcmp (str, ifname) == 0)
- return i;
- return -1;
- }
- void
- ripng_passive_interface_apply (struct interface *ifp)
- {
- int ret;
- struct ripng_interface *ri;
- ri = ifp->info;
- ret = ripng_passive_interface_lookup (ifp->name);
- if (ret < 0)
- ri->passive = 0;
- else
- ri->passive = 1;
- }
- static void
- ripng_passive_interface_apply_all (void)
- {
- struct interface *ifp;
- struct listnode *node;
- for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp))
- ripng_passive_interface_apply (ifp);
- }
- /* Passive interface. */
- static int
- ripng_passive_interface_set (struct vty *vty, const char *ifname)
- {
- if (ripng_passive_interface_lookup (ifname) >= 0)
- return CMD_WARNING;
- vector_set (Vripng_passive_interface, strdup (ifname));
- ripng_passive_interface_apply_all ();
- return CMD_SUCCESS;
- }
- static int
- ripng_passive_interface_unset (struct vty *vty, const char *ifname)
- {
- int i;
- char *str;
- i = ripng_passive_interface_lookup (ifname);
- if (i < 0)
- return CMD_WARNING;
- str = vector_slot (Vripng_passive_interface, i);
- free (str);
- vector_unset (Vripng_passive_interface, i);
- ripng_passive_interface_apply_all ();
- return CMD_SUCCESS;
- }
- /* Free all configured RIP passive-interface settings. */
- void
- ripng_passive_interface_clean (void)
- {
- unsigned int i;
- char *str;
- for (i = 0; i < vector_active (Vripng_passive_interface); i++)
- if ((str = vector_slot (Vripng_passive_interface, i)) != NULL)
- {
- free (str);
- vector_slot (Vripng_passive_interface, i) = NULL;
- }
- ripng_passive_interface_apply_all ();
- }
- /* Write RIPng enable network and interface to the vty. */
- int
- ripng_network_write (struct vty *vty, int config_mode)
- {
- unsigned int i;
- const char *ifname;
- struct route_node *node;
- char buf[BUFSIZ];
- /* Write enable network. */
- for (node = route_top (ripng_enable_network); node; node = route_next (node))
- if (node->info)
- {
- struct prefix *p = &node->p;
- vty_out (vty, "%s%s/%d%s",
- config_mode ? " network " : " ",
- inet_ntop (p->family, &p->u.prefix, buf, BUFSIZ),
- p->prefixlen,
- VTY_NEWLINE);
- }
-
- /* Write enable interface. */
- for (i = 0; i < vector_active (ripng_enable_if); i++)
- if ((ifname = vector_slot (ripng_enable_if, i)) != NULL)
- vty_out (vty, "%s%s%s",
- config_mode ? " network " : " ",
- ifname,
- VTY_NEWLINE);
- /* Write passive interface. */
- if (config_mode)
- for (i = 0; i < vector_active (Vripng_passive_interface); i++)
- if ((ifname = vector_slot (Vripng_passive_interface, i)) != NULL)
- vty_out (vty, " passive-interface %s%s", ifname, VTY_NEWLINE);
- return 0;
- }
- /* RIPng enable on specified interface or matched network. */
- DEFUN (ripng_network,
- ripng_network_cmd,
- "network IF_OR_ADDR",
- "RIPng enable on specified interface or network.\n"
- "Interface or address")
- {
- int ret;
- struct prefix p;
- ret = str2prefix (argv[0], &p);
- /* Given string is IPv6 network or interface name. */
- if (ret)
- ret = ripng_enable_network_add (&p);
- else
- ret = ripng_enable_if_add (argv[0]);
- if (ret < 0)
- {
- vty_out (vty, "There is same network configuration %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
- return CMD_SUCCESS;
- }
- /* RIPng enable on specified interface or matched network. */
- DEFUN (no_ripng_network,
- no_ripng_network_cmd,
- "no network IF_OR_ADDR",
- NO_STR
- "RIPng enable on specified interface or network.\n"
- "Interface or address")
- {
- int ret;
- struct prefix p;
- ret = str2prefix (argv[0], &p);
- /* Given string is interface name. */
- if (ret)
- ret = ripng_enable_network_delete (&p);
- else
- ret = ripng_enable_if_delete (argv[0]);
- if (ret < 0)
- {
- vty_out (vty, "can't find network %s%s", argv[0],
- VTY_NEWLINE);
- return CMD_WARNING;
- }
-
- return CMD_SUCCESS;
- }
- DEFUN (ipv6_ripng_split_horizon,
- ipv6_ripng_split_horizon_cmd,
- "ipv6 ripng split-horizon",
- IPV6_STR
- "Routing Information Protocol\n"
- "Perform split horizon\n")
- {
- struct interface *ifp;
- struct ripng_interface *ri;
- ifp = vty->index;
- ri = ifp->info;
- ri->split_horizon = RIPNG_SPLIT_HORIZON;
- return CMD_SUCCESS;
- }
- DEFUN (ipv6_ripng_split_horizon_poisoned_reverse,
- ipv6_ripng_split_horizon_poisoned_reverse_cmd,
- "ipv6 ripng split-horizon poisoned-reverse",
- IPV6_STR
- "Routing Information Protocol\n"
- "Perform split horizon\n"
- "With poisoned-reverse\n")
- {
- struct interface *ifp;
- struct ripng_interface *ri;
- ifp = vty->index;
- ri = ifp->info;
- ri->split_horizon = RIPNG_SPLIT_HORIZON_POISONED_REVERSE;
- return CMD_SUCCESS;
- }
- DEFUN (no_ipv6_ripng_split_horizon,
- no_ipv6_ripng_split_horizon_cmd,
- "no ipv6 ripng split-horizon",
- NO_STR
- IPV6_STR
- "Routing Information Protocol\n"
- "Perform split horizon\n")
- {
- struct interface *ifp;
- struct ripng_interface *ri;
- ifp = vty->index;
- ri = ifp->info;
- ri->split_horizon = RIPNG_NO_SPLIT_HORIZON;
- return CMD_SUCCESS;
- }
- ALIAS (no_ipv6_ripng_split_horizon,
- no_ipv6_ripng_split_horizon_poisoned_reverse_cmd,
- "no ipv6 ripng split-horizon poisoned-reverse",
- NO_STR
- IPV6_STR
- "Routing Information Protocol\n"
- "Perform split horizon\n"
- "With poisoned-reverse\n")
- DEFUN (ripng_passive_interface,
- ripng_passive_interface_cmd,
- "passive-interface IFNAME",
- "Suppress routing updates on an interface\n"
- "Interface name\n")
- {
- return ripng_passive_interface_set (vty, argv[0]);
- }
- DEFUN (no_ripng_passive_interface,
- no_ripng_passive_interface_cmd,
- "no passive-interface IFNAME",
- NO_STR
- "Suppress routing updates on an interface\n"
- "Interface name\n")
- {
- return ripng_passive_interface_unset (vty, argv[0]);
- }
- static struct ripng_interface *
- ri_new (void)
- {
- struct ripng_interface *ri;
- ri = XCALLOC (MTYPE_IF, sizeof (struct ripng_interface));
- /* Set default split-horizon behavior. If the interface is Frame
- Relay or SMDS is enabled, the default value for split-horizon is
- off. But currently Zebra does detect Frame Relay or SMDS
- interface. So all interface is set to split horizon. */
- ri->split_horizon_default = RIPNG_SPLIT_HORIZON;
- ri->split_horizon = ri->split_horizon_default;
- return ri;
- }
- static int
- ripng_if_new_hook (struct interface *ifp)
- {
- ifp->info = ri_new ();
- return 0;
- }
- /* Called when interface structure deleted. */
- static int
- ripng_if_delete_hook (struct interface *ifp)
- {
- XFREE (MTYPE_IF, ifp->info);
- ifp->info = NULL;
- return 0;
- }
- /* Configuration write function for ripngd. */
- static int
- interface_config_write (struct vty *vty)
- {
- struct listnode *node;
- struct interface *ifp;
- struct ripng_interface *ri;
- int write = 0;
- for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp))
- {
- ri = ifp->info;
- /* Do not display the interface if there is no
- * configuration about it.
- **/
- if ((!ifp->desc) &&
- (ri->split_horizon == ri->split_horizon_default))
- continue;
- vty_out (vty, "interface %s%s", ifp->name,
- VTY_NEWLINE);
- if (ifp->desc)
- vty_out (vty, " description %s%s", ifp->desc,
- VTY_NEWLINE);
- /* Split horizon. */
- if (ri->split_horizon != ri->split_horizon_default)
- {
- switch (ri->split_horizon) {
- case RIPNG_SPLIT_HORIZON:
- vty_out (vty, " ipv6 ripng split-horizon%s", VTY_NEWLINE);
- break;
- case RIPNG_SPLIT_HORIZON_POISONED_REVERSE:
- vty_out (vty, " ipv6 ripng split-horizon poisoned-reverse%s",
- VTY_NEWLINE);
- break;
- case RIPNG_NO_SPLIT_HORIZON:
- default:
- vty_out (vty, " no ipv6 ripng split-horizon%s", VTY_NEWLINE);
- break;
- }
- }
- vty_out (vty, "!%s", VTY_NEWLINE);
- write++;
- }
- return write;
- }
- /* ripngd's interface node. */
- struct cmd_node interface_node =
- {
- INTERFACE_NODE,
- "%s(config-if)# ",
- 1 /* VTYSH */
- };
- /* Initialization of interface. */
- void
- ripng_if_init ()
- {
- /* Interface initialize. */
- iflist = list_new ();
- if_add_hook (IF_NEW_HOOK, ripng_if_new_hook);
- if_add_hook (IF_DELETE_HOOK, ripng_if_delete_hook);
- /* RIPng enable network init. */
- ripng_enable_network = route_table_init ();
- /* RIPng enable interface init. */
- ripng_enable_if = vector_init (1);
- /* RIPng passive interface. */
- Vripng_passive_interface = vector_init (1);
- /* Install interface node. */
- install_node (&interface_node, interface_config_write);
-
- /* Install commands. */
- install_element (CONFIG_NODE, &interface_cmd);
- install_element (CONFIG_NODE, &no_interface_cmd);
- install_default (INTERFACE_NODE);
- install_element (INTERFACE_NODE, &interface_desc_cmd);
- install_element (INTERFACE_NODE, &no_interface_desc_cmd);
- install_element (RIPNG_NODE, &ripng_network_cmd);
- install_element (RIPNG_NODE, &no_ripng_network_cmd);
- install_element (RIPNG_NODE, &ripng_passive_interface_cmd);
- install_element (RIPNG_NODE, &no_ripng_passive_interface_cmd);
- install_element (INTERFACE_NODE, &ipv6_ripng_split_horizon_cmd);
- install_element (INTERFACE_NODE, &ipv6_ripng_split_horizon_poisoned_reverse_cmd);
- install_element (INTERFACE_NODE, &no_ipv6_ripng_split_horizon_cmd);
- install_element (INTERFACE_NODE, &no_ipv6_ripng_split_horizon_poisoned_reverse_cmd);
- }
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