diff options
Diffstat (limited to 'zebra/zebra_static.c')
| -rw-r--r-- | zebra/zebra_static.c | 924 |
1 files changed, 463 insertions, 461 deletions
diff --git a/zebra/zebra_static.c b/zebra/zebra_static.c index 05336ca6b..ae3239516 100644 --- a/zebra/zebra_static.c +++ b/zebra/zebra_static.c @@ -36,484 +36,486 @@ #include "zebra/zebra_memory.h" /* Install static route into rib. */ -void -static_install_route (afi_t afi, safi_t safi, struct prefix *p, - struct prefix_ipv6 *src_p, struct static_route *si) +void static_install_route(afi_t afi, safi_t safi, struct prefix *p, + struct prefix_ipv6 *src_p, struct static_route *si) { - struct route_entry *re; - struct route_node *rn; - struct route_table *table; - struct prefix nh_p; - struct nexthop *nexthop = NULL; - - /* Lookup table. */ - table = zebra_vrf_table (afi, safi, si->vrf_id); - if (! table) - return; - - memset (&nh_p, 0, sizeof (nh_p)); - - /* Lookup existing route */ - rn = srcdest_rnode_get (table, p, src_p); - RNODE_FOREACH_RE (rn, re) - { - if (CHECK_FLAG (re->status, ROUTE_ENTRY_REMOVED)) - continue; - - if (re->type == ZEBRA_ROUTE_STATIC && re->distance == si->distance) - break; - } - - if (re) - { - /* if tag value changed , update old value in RIB */ - if (re->tag != si->tag) - re->tag = si->tag; - - /* Same distance static route is there. Update it with new - nexthop. */ - route_unlock_node (rn); - switch (si->type) - { - case STATIC_IPV4_GATEWAY: - nexthop = route_entry_nexthop_ipv4_add (re, &si->addr.ipv4, NULL); - nh_p.family = AF_INET; - nh_p.prefixlen = IPV4_MAX_BITLEN; - nh_p.u.prefix4 = si->addr.ipv4; - zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); - break; - case STATIC_IFINDEX: - nexthop = route_entry_nexthop_ifindex_add (re, si->ifindex); - break; - case STATIC_BLACKHOLE: - nexthop = route_entry_nexthop_blackhole_add (re); - break; - case STATIC_IPV6_GATEWAY: - nexthop = route_entry_nexthop_ipv6_add (re, &si->addr.ipv6); - nh_p.family = AF_INET6; - nh_p.prefixlen = IPV6_MAX_BITLEN; - nh_p.u.prefix6 = si->addr.ipv6; - zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); - break; - case STATIC_IPV6_GATEWAY_IFINDEX: - nexthop = route_entry_nexthop_ipv6_ifindex_add (re, &si->addr.ipv6, - si->ifindex); - break; - } - /* Update label(s), if present. */ - if (si->snh_label.num_labels) - nexthop_add_labels (nexthop, ZEBRA_LSP_STATIC, si->snh_label.num_labels, - &si->snh_label.label[0]); - - if (IS_ZEBRA_DEBUG_RIB) - { - char buf[INET6_ADDRSTRLEN]; - if (IS_ZEBRA_DEBUG_RIB) - { - inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); - zlog_debug ("%u:%s/%d: Modifying route rn %p, re %p (type %d)", - si->vrf_id, buf, p->prefixlen, rn, re, re->type); - } - } - /* Schedule route for processing or invoke NHT, as appropriate. */ - if (si->type == STATIC_IPV4_GATEWAY || - si->type == STATIC_IPV6_GATEWAY) - zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, RNH_NEXTHOP_TYPE, &nh_p); - else - rib_queue_add (rn); - } - else - { - /* This is new static route. */ - re = XCALLOC (MTYPE_RE, sizeof (struct route_entry)); - - re->type = ZEBRA_ROUTE_STATIC; - re->instance = 0; - re->distance = si->distance; - re->metric = 0; - re->mtu = 0; - re->vrf_id = si->vrf_id; - re->table = si->vrf_id ? (zebra_vrf_lookup_by_id(si->vrf_id))->table_id : zebrad.rtm_table_default; - re->nexthop_num = 0; - re->tag = si->tag; - - switch (si->type) - { - case STATIC_IPV4_GATEWAY: - nexthop = route_entry_nexthop_ipv4_add (re, &si->addr.ipv4, NULL); - nh_p.family = AF_INET; - nh_p.prefixlen = IPV4_MAX_BITLEN; - nh_p.u.prefix4 = si->addr.ipv4; - zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); - break; - case STATIC_IFINDEX: - nexthop = route_entry_nexthop_ifindex_add (re, si->ifindex); - break; - case STATIC_BLACKHOLE: - nexthop = route_entry_nexthop_blackhole_add (re); - break; - case STATIC_IPV6_GATEWAY: - nexthop = route_entry_nexthop_ipv6_add (re, &si->addr.ipv6); - nh_p.family = AF_INET6; - nh_p.prefixlen = IPV6_MAX_BITLEN; - nh_p.u.prefix6 = si->addr.ipv6; - zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); - break; - case STATIC_IPV6_GATEWAY_IFINDEX: - nexthop = route_entry_nexthop_ipv6_ifindex_add (re, &si->addr.ipv6, - si->ifindex); - break; - } - /* Update label(s), if present. */ - if (si->snh_label.num_labels) - nexthop_add_labels (nexthop, ZEBRA_LSP_STATIC, si->snh_label.num_labels, - &si->snh_label.label[0]); - - /* Save the flags of this static routes (reject, blackhole) */ - re->flags = si->flags; - - if (IS_ZEBRA_DEBUG_RIB) - { - char buf[INET6_ADDRSTRLEN]; - if (IS_ZEBRA_DEBUG_RIB) - { - inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); - zlog_debug ("%u:%s/%d: Inserting route rn %p, re %p (type %d)", - si->vrf_id, buf, p->prefixlen, rn, re, re->type); - } - } - /* Link this re to the tree. Schedule for processing or invoke NHT, - * as appropriate. - */ - if (si->type == STATIC_IPV4_GATEWAY || - si->type == STATIC_IPV6_GATEWAY) - { - rib_addnode (rn, re, 0); - zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, RNH_NEXTHOP_TYPE, &nh_p); - } - else - rib_addnode (rn, re, 1); - } + struct route_entry *re; + struct route_node *rn; + struct route_table *table; + struct prefix nh_p; + struct nexthop *nexthop = NULL; + + /* Lookup table. */ + table = zebra_vrf_table(afi, safi, si->vrf_id); + if (!table) + return; + + memset(&nh_p, 0, sizeof(nh_p)); + + /* Lookup existing route */ + rn = srcdest_rnode_get(table, p, src_p); + RNODE_FOREACH_RE(rn, re) + { + if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) + continue; + + if (re->type == ZEBRA_ROUTE_STATIC + && re->distance == si->distance) + break; + } + + if (re) { + /* if tag value changed , update old value in RIB */ + if (re->tag != si->tag) + re->tag = si->tag; + + /* Same distance static route is there. Update it with new + nexthop. */ + route_unlock_node(rn); + switch (si->type) { + case STATIC_IPV4_GATEWAY: + nexthop = route_entry_nexthop_ipv4_add( + re, &si->addr.ipv4, NULL); + nh_p.family = AF_INET; + nh_p.prefixlen = IPV4_MAX_BITLEN; + nh_p.u.prefix4 = si->addr.ipv4; + zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); + break; + case STATIC_IFINDEX: + nexthop = route_entry_nexthop_ifindex_add(re, + si->ifindex); + break; + case STATIC_BLACKHOLE: + nexthop = route_entry_nexthop_blackhole_add(re); + break; + case STATIC_IPV6_GATEWAY: + nexthop = route_entry_nexthop_ipv6_add(re, + &si->addr.ipv6); + nh_p.family = AF_INET6; + nh_p.prefixlen = IPV6_MAX_BITLEN; + nh_p.u.prefix6 = si->addr.ipv6; + zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); + break; + case STATIC_IPV6_GATEWAY_IFINDEX: + nexthop = route_entry_nexthop_ipv6_ifindex_add( + re, &si->addr.ipv6, si->ifindex); + break; + } + /* Update label(s), if present. */ + if (si->snh_label.num_labels) + nexthop_add_labels(nexthop, ZEBRA_LSP_STATIC, + si->snh_label.num_labels, + &si->snh_label.label[0]); + + if (IS_ZEBRA_DEBUG_RIB) { + char buf[INET6_ADDRSTRLEN]; + if (IS_ZEBRA_DEBUG_RIB) { + inet_ntop(p->family, &p->u.prefix, buf, + INET6_ADDRSTRLEN); + zlog_debug( + "%u:%s/%d: Modifying route rn %p, re %p (type %d)", + si->vrf_id, buf, p->prefixlen, rn, re, + re->type); + } + } + /* Schedule route for processing or invoke NHT, as appropriate. + */ + if (si->type == STATIC_IPV4_GATEWAY + || si->type == STATIC_IPV6_GATEWAY) + zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, + RNH_NEXTHOP_TYPE, &nh_p); + else + rib_queue_add(rn); + } else { + /* This is new static route. */ + re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); + + re->type = ZEBRA_ROUTE_STATIC; + re->instance = 0; + re->distance = si->distance; + re->metric = 0; + re->mtu = 0; + re->vrf_id = si->vrf_id; + re->table = + si->vrf_id + ? (zebra_vrf_lookup_by_id(si->vrf_id))->table_id + : zebrad.rtm_table_default; + re->nexthop_num = 0; + re->tag = si->tag; + + switch (si->type) { + case STATIC_IPV4_GATEWAY: + nexthop = route_entry_nexthop_ipv4_add( + re, &si->addr.ipv4, NULL); + nh_p.family = AF_INET; + nh_p.prefixlen = IPV4_MAX_BITLEN; + nh_p.u.prefix4 = si->addr.ipv4; + zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); + break; + case STATIC_IFINDEX: + nexthop = route_entry_nexthop_ifindex_add(re, + si->ifindex); + break; + case STATIC_BLACKHOLE: + nexthop = route_entry_nexthop_blackhole_add(re); + break; + case STATIC_IPV6_GATEWAY: + nexthop = route_entry_nexthop_ipv6_add(re, + &si->addr.ipv6); + nh_p.family = AF_INET6; + nh_p.prefixlen = IPV6_MAX_BITLEN; + nh_p.u.prefix6 = si->addr.ipv6; + zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); + break; + case STATIC_IPV6_GATEWAY_IFINDEX: + nexthop = route_entry_nexthop_ipv6_ifindex_add( + re, &si->addr.ipv6, si->ifindex); + break; + } + /* Update label(s), if present. */ + if (si->snh_label.num_labels) + nexthop_add_labels(nexthop, ZEBRA_LSP_STATIC, + si->snh_label.num_labels, + &si->snh_label.label[0]); + + /* Save the flags of this static routes (reject, blackhole) */ + re->flags = si->flags; + + if (IS_ZEBRA_DEBUG_RIB) { + char buf[INET6_ADDRSTRLEN]; + if (IS_ZEBRA_DEBUG_RIB) { + inet_ntop(p->family, &p->u.prefix, buf, + INET6_ADDRSTRLEN); + zlog_debug( + "%u:%s/%d: Inserting route rn %p, re %p (type %d)", + si->vrf_id, buf, p->prefixlen, rn, re, + re->type); + } + } + /* Link this re to the tree. Schedule for processing or invoke + * NHT, + * as appropriate. + */ + if (si->type == STATIC_IPV4_GATEWAY + || si->type == STATIC_IPV6_GATEWAY) { + rib_addnode(rn, re, 0); + zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, + RNH_NEXTHOP_TYPE, &nh_p); + } else + rib_addnode(rn, re, 1); + } } -static int -static_nexthop_same (struct nexthop *nexthop, struct static_route *si) +static int static_nexthop_same(struct nexthop *nexthop, struct static_route *si) { - if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE - && si->type == STATIC_BLACKHOLE) - return 1; - - if (nexthop->type == NEXTHOP_TYPE_IPV4 - && si->type == STATIC_IPV4_GATEWAY - && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->addr.ipv4)) - return 1; - else if (nexthop->type == NEXTHOP_TYPE_IFINDEX - && si->type == STATIC_IFINDEX - && nexthop->ifindex == si->ifindex) - return 1; - else if (nexthop->type == NEXTHOP_TYPE_IPV6 - && si->type == STATIC_IPV6_GATEWAY - && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->addr.ipv6)) - return 1; - else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX - && si->type == STATIC_IPV6_GATEWAY_IFINDEX - && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->addr.ipv6) - && nexthop->ifindex == si->ifindex) - return 1; - - return 0; + if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE + && si->type == STATIC_BLACKHOLE) + return 1; + + if (nexthop->type == NEXTHOP_TYPE_IPV4 + && si->type == STATIC_IPV4_GATEWAY + && IPV4_ADDR_SAME(&nexthop->gate.ipv4, &si->addr.ipv4)) + return 1; + else if (nexthop->type == NEXTHOP_TYPE_IFINDEX + && si->type == STATIC_IFINDEX + && nexthop->ifindex == si->ifindex) + return 1; + else if (nexthop->type == NEXTHOP_TYPE_IPV6 + && si->type == STATIC_IPV6_GATEWAY + && IPV6_ADDR_SAME(&nexthop->gate.ipv6, &si->addr.ipv6)) + return 1; + else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX + && si->type == STATIC_IPV6_GATEWAY_IFINDEX + && IPV6_ADDR_SAME(&nexthop->gate.ipv6, &si->addr.ipv6) + && nexthop->ifindex == si->ifindex) + return 1; + + return 0; } /* Uninstall static route from RIB. */ -void -static_uninstall_route (afi_t afi, safi_t safi, struct prefix *p, - struct prefix_ipv6 *src_p, struct static_route *si) +void static_uninstall_route(afi_t afi, safi_t safi, struct prefix *p, + struct prefix_ipv6 *src_p, struct static_route *si) { - struct route_node *rn; - struct route_entry *re; - struct nexthop *nexthop; - struct route_table *table; - struct prefix nh_p; - - /* Lookup table. */ - table = zebra_vrf_table (afi, safi, si->vrf_id); - if (! table) - return; - - /* Lookup existing route with type and distance. */ - rn = srcdest_rnode_lookup (table, p, src_p); - if (! rn) - return; - - RNODE_FOREACH_RE (rn, re) - { - if (CHECK_FLAG (re->status, ROUTE_ENTRY_REMOVED)) - continue; - - if (re->type == ZEBRA_ROUTE_STATIC && re->distance == si->distance && - re->tag == si->tag) - break; - } - - if (! re) - { - route_unlock_node (rn); - return; - } - - /* Lookup nexthop. */ - for (nexthop = re->nexthop; nexthop; nexthop = nexthop->next) - if (static_nexthop_same (nexthop, si)) - break; - - /* Can't find nexthop. */ - if (! nexthop) - { - route_unlock_node (rn); - return; - } - - /* Check nexthop. */ - if (re->nexthop_num == 1) - rib_delnode (rn, re); - else - { - /* Mark this nexthop as inactive and reinstall the route. Then, delete - * the nexthop. There is no need to re-evaluate the route for this - * scenario. - */ - if (IS_ZEBRA_DEBUG_RIB) - { - char buf[INET6_ADDRSTRLEN]; - if (IS_ZEBRA_DEBUG_RIB) - { - inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); - zlog_debug ("%u:%s/%d: Modifying route rn %p, re %p (type %d)", - si->vrf_id, buf, p->prefixlen, rn, re, re->type); - } - } - UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); - if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) - { - /* If there are other active nexthops, do an update. */ - if (re->nexthop_active_num > 1) - { - /* Update route in kernel if it's in fib */ - if (CHECK_FLAG(re->status, ROUTE_ENTRY_SELECTED_FIB)) - rib_install_kernel (rn, re, re); - /* Update redistribution if it's selected */ - if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) - redistribute_update (p, (struct prefix*)src_p, re, NULL); - } - else - { - /* Remove from redistribute if selected route becomes inactive */ - if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) - redistribute_delete (p, (struct prefix*)src_p, re); - /* Remove from kernel if fib route becomes inactive */ - if (CHECK_FLAG(re->status, ROUTE_ENTRY_SELECTED_FIB)) - rib_uninstall_kernel (rn, re); - } - } - - if (afi == AFI_IP) + struct route_node *rn; + struct route_entry *re; + struct nexthop *nexthop; + struct route_table *table; + struct prefix nh_p; + + /* Lookup table. */ + table = zebra_vrf_table(afi, safi, si->vrf_id); + if (!table) + return; + + /* Lookup existing route with type and distance. */ + rn = srcdest_rnode_lookup(table, p, src_p); + if (!rn) + return; + + RNODE_FOREACH_RE(rn, re) { - /* Delete the nexthop and dereg from NHT */ - nh_p.family = AF_INET; - nh_p.prefixlen = IPV4_MAX_BITLEN; - nh_p.u.prefix4 = nexthop->gate.ipv4; + if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) + continue; + + if (re->type == ZEBRA_ROUTE_STATIC + && re->distance == si->distance && re->tag == si->tag) + break; } - else - { - nh_p.family = AF_INET6; - nh_p.prefixlen = IPV6_MAX_BITLEN; - nh_p.u.prefix6 = nexthop->gate.ipv6; + + if (!re) { + route_unlock_node(rn); + return; } - route_entry_nexthop_delete (re, nexthop); - zebra_deregister_rnh_static_nh(si->vrf_id, &nh_p, rn); - nexthop_free (nexthop); - } - /* Unlock node. */ - route_unlock_node (rn); -} -int -static_add_route (afi_t afi, safi_t safi, u_char type, struct prefix *p, - struct prefix_ipv6 *src_p, - union g_addr *gate, ifindex_t ifindex, - const char *ifname, u_char flags, route_tag_t tag, - u_char distance, struct zebra_vrf *zvrf, - struct static_nh_label *snh_label) -{ - struct route_node *rn; - struct static_route *si; - struct static_route *pp; - struct static_route *cp; - struct static_route *update = NULL; - struct route_table *stable = zvrf->stable[afi][safi]; - - if (! stable) - return -1; - - if (!gate && - (type == STATIC_IPV4_GATEWAY || - type == STATIC_IPV6_GATEWAY || - type == STATIC_IPV6_GATEWAY_IFINDEX)) - return -1; - - if (!ifindex && - (type == STATIC_IFINDEX || - type == STATIC_IPV6_GATEWAY_IFINDEX)) - return -1; - - /* Lookup static route prefix. */ - rn = srcdest_rnode_get (stable, p, src_p); - - /* Do nothing if there is a same static route. */ - for (si = rn->info; si; si = si->next) - { - if (type == si->type - && (! gate || - ((afi == AFI_IP && IPV4_ADDR_SAME (gate, &si->addr.ipv4)) || - (afi == AFI_IP6 && IPV6_ADDR_SAME (gate, &si->addr.ipv6)))) - && (! ifindex || ifindex == si->ifindex)) - { - if ((distance == si->distance) && (tag == si->tag) && - !memcmp (&si->snh_label, snh_label, sizeof (struct static_nh_label)) && - si->flags == flags) - { - route_unlock_node (rn); - return 0; - } - else - update = si; + /* Lookup nexthop. */ + for (nexthop = re->nexthop; nexthop; nexthop = nexthop->next) + if (static_nexthop_same(nexthop, si)) + break; + + /* Can't find nexthop. */ + if (!nexthop) { + route_unlock_node(rn); + return; } - } - - /* Distance or tag or label changed, delete existing first. */ - if (update) - static_delete_route (afi, safi, type, p, src_p, gate, ifindex, update->tag, - update->distance, zvrf, &update->snh_label); - - /* Make new static route structure. */ - si = XCALLOC (MTYPE_STATIC_ROUTE, sizeof (struct static_route)); - - si->type = type; - si->distance = distance; - si->flags = flags; - si->tag = tag; - si->vrf_id = zvrf_id (zvrf); - si->ifindex = ifindex; - if (si->ifindex) - strcpy(si->ifname, ifname); - - switch (type) - { - case STATIC_IPV4_GATEWAY: - si->addr.ipv4 = gate->ipv4; - break; - case STATIC_IPV6_GATEWAY: - si->addr.ipv6 = gate->ipv6; - break; - case STATIC_IPV6_GATEWAY_IFINDEX: - si->addr.ipv6 = gate->ipv6; - break; - case STATIC_IFINDEX: - break; - } - - /* Save labels, if any. */ - memcpy (&si->snh_label, snh_label, sizeof (struct static_nh_label)); - - /* Add new static route information to the tree with sort by - distance value and gateway address. */ - for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) - { - if (si->distance < cp->distance) - break; - if (si->distance > cp->distance) - continue; - if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) - { - if (ntohl (si->addr.ipv4.s_addr) < ntohl (cp->addr.ipv4.s_addr)) - break; - if (ntohl (si->addr.ipv4.s_addr) > ntohl (cp->addr.ipv4.s_addr)) - continue; + + /* Check nexthop. */ + if (re->nexthop_num == 1) + rib_delnode(rn, re); + else { + /* Mark this nexthop as inactive and reinstall the route. Then, + * delete + * the nexthop. There is no need to re-evaluate the route for + * this + * scenario. + */ + if (IS_ZEBRA_DEBUG_RIB) { + char buf[INET6_ADDRSTRLEN]; + if (IS_ZEBRA_DEBUG_RIB) { + inet_ntop(p->family, &p->u.prefix, buf, + INET6_ADDRSTRLEN); + zlog_debug( + "%u:%s/%d: Modifying route rn %p, re %p (type %d)", + si->vrf_id, buf, p->prefixlen, rn, re, + re->type); + } + } + UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); + if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { + /* If there are other active nexthops, do an update. */ + if (re->nexthop_active_num > 1) { + /* Update route in kernel if it's in fib */ + if (CHECK_FLAG(re->status, + ROUTE_ENTRY_SELECTED_FIB)) + rib_install_kernel(rn, re, re); + /* Update redistribution if it's selected */ + if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) + redistribute_update( + p, (struct prefix *)src_p, re, + NULL); + } else { + /* Remove from redistribute if selected route + * becomes inactive */ + if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) + redistribute_delete( + p, (struct prefix *)src_p, re); + /* Remove from kernel if fib route becomes + * inactive */ + if (CHECK_FLAG(re->status, + ROUTE_ENTRY_SELECTED_FIB)) + rib_uninstall_kernel(rn, re); + } + } + + if (afi == AFI_IP) { + /* Delete the nexthop and dereg from NHT */ + nh_p.family = AF_INET; + nh_p.prefixlen = IPV4_MAX_BITLEN; + nh_p.u.prefix4 = nexthop->gate.ipv4; + } else { + nh_p.family = AF_INET6; + nh_p.prefixlen = IPV6_MAX_BITLEN; + nh_p.u.prefix6 = nexthop->gate.ipv6; + } + route_entry_nexthop_delete(re, nexthop); + zebra_deregister_rnh_static_nh(si->vrf_id, &nh_p, rn); + nexthop_free(nexthop); } - } - - /* Make linked list. */ - if (pp) - pp->next = si; - else - rn->info = si; - if (cp) - cp->prev = si; - si->prev = pp; - si->next = cp; - - /* Install into rib. */ - static_install_route (afi, safi, p, src_p, si); - - return 1; + /* Unlock node. */ + route_unlock_node(rn); } -int -static_delete_route (afi_t afi, safi_t safi, u_char type, struct prefix *p, - struct prefix_ipv6 *src_p, - union g_addr *gate, ifindex_t ifindex, +int static_add_route(afi_t afi, safi_t safi, u_char type, struct prefix *p, + struct prefix_ipv6 *src_p, union g_addr *gate, + ifindex_t ifindex, const char *ifname, u_char flags, route_tag_t tag, u_char distance, struct zebra_vrf *zvrf, struct static_nh_label *snh_label) { - struct route_node *rn; - struct static_route *si; - struct route_table *stable; - - /* Lookup table. */ - stable = zebra_vrf_static_table (afi, safi, zvrf); - if (! stable) - return -1; - - /* Lookup static route prefix. */ - rn = srcdest_rnode_lookup (stable, p, src_p); - if (! rn) - return 0; - - /* Find same static route is the tree */ - for (si = rn->info; si; si = si->next) - if (type == si->type - && (! gate || ( - (afi == AFI_IP && IPV4_ADDR_SAME (gate, &si->addr.ipv4)) || - (afi == AFI_IP6 && IPV6_ADDR_SAME (gate, &si->addr.ipv6)))) - && (! ifindex || ifindex == si->ifindex) - && (! tag || (tag == si->tag)) - && (! snh_label->num_labels || - !memcmp (&si->snh_label, snh_label, sizeof (struct static_nh_label)))) - break; - - /* Can't find static route. */ - if (! si) - { - route_unlock_node (rn); - return 0; - } - - /* Install into rib. */ - static_uninstall_route (afi, safi, p, src_p, si); - - /* Unlink static route from linked list. */ - if (si->prev) - si->prev->next = si->next; - else - rn->info = si->next; - if (si->next) - si->next->prev = si->prev; - route_unlock_node (rn); - - /* Free static route configuration. */ - XFREE (MTYPE_STATIC_ROUTE, si); - - route_unlock_node (rn); - - return 1; + struct route_node *rn; + struct static_route *si; + struct static_route *pp; + struct static_route *cp; + struct static_route *update = NULL; + struct route_table *stable = zvrf->stable[afi][safi]; + + if (!stable) + return -1; + + if (!gate && (type == STATIC_IPV4_GATEWAY || type == STATIC_IPV6_GATEWAY + || type == STATIC_IPV6_GATEWAY_IFINDEX)) + return -1; + + if (!ifindex + && (type == STATIC_IFINDEX || type == STATIC_IPV6_GATEWAY_IFINDEX)) + return -1; + + /* Lookup static route prefix. */ + rn = srcdest_rnode_get(stable, p, src_p); + + /* Do nothing if there is a same static route. */ + for (si = rn->info; si; si = si->next) { + if (type == si->type + && (!gate || ((afi == AFI_IP + && IPV4_ADDR_SAME(gate, &si->addr.ipv4)) + || (afi == AFI_IP6 + && IPV6_ADDR_SAME(gate, &si->addr.ipv6)))) + && (!ifindex || ifindex == si->ifindex)) { + if ((distance == si->distance) && (tag == si->tag) + && !memcmp(&si->snh_label, snh_label, + sizeof(struct static_nh_label)) + && si->flags == flags) { + route_unlock_node(rn); + return 0; + } else + update = si; + } + } + + /* Distance or tag or label changed, delete existing first. */ + if (update) + static_delete_route(afi, safi, type, p, src_p, gate, ifindex, + update->tag, update->distance, zvrf, + &update->snh_label); + + /* Make new static route structure. */ + si = XCALLOC(MTYPE_STATIC_ROUTE, sizeof(struct static_route)); + + si->type = type; + si->distance = distance; + si->flags = flags; + si->tag = tag; + si->vrf_id = zvrf_id(zvrf); + si->ifindex = ifindex; + if (si->ifindex) + strcpy(si->ifname, ifname); + + switch (type) { + case STATIC_IPV4_GATEWAY: + si->addr.ipv4 = gate->ipv4; + break; + case STATIC_IPV6_GATEWAY: + si->addr.ipv6 = gate->ipv6; + break; + case STATIC_IPV6_GATEWAY_IFINDEX: + si->addr.ipv6 = gate->ipv6; + break; + case STATIC_IFINDEX: + break; + } + + /* Save labels, if any. */ + memcpy(&si->snh_label, snh_label, sizeof(struct static_nh_label)); + + /* Add new static route information to the tree with sort by + distance value and gateway address. */ + for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) { + if (si->distance < cp->distance) + break; + if (si->distance > cp->distance) + continue; + if (si->type == STATIC_IPV4_GATEWAY + && cp->type == STATIC_IPV4_GATEWAY) { + if (ntohl(si->addr.ipv4.s_addr) + < ntohl(cp->addr.ipv4.s_addr)) + break; + if (ntohl(si->addr.ipv4.s_addr) + > ntohl(cp->addr.ipv4.s_addr)) + continue; + } + } + + /* Make linked list. */ + if (pp) + pp->next = si; + else + rn->info = si; + if (cp) + cp->prev = si; + si->prev = pp; + si->next = cp; + + /* Install into rib. */ + static_install_route(afi, safi, p, src_p, si); + + return 1; +} + +int static_delete_route(afi_t afi, safi_t safi, u_char type, struct prefix *p, + struct prefix_ipv6 *src_p, union g_addr *gate, + ifindex_t ifindex, route_tag_t tag, u_char distance, + struct zebra_vrf *zvrf, + struct static_nh_label *snh_label) +{ + struct route_node *rn; + struct static_route *si; + struct route_table *stable; + + /* Lookup table. */ + stable = zebra_vrf_static_table(afi, safi, zvrf); + if (!stable) + return -1; + + /* Lookup static route prefix. */ + rn = srcdest_rnode_lookup(stable, p, src_p); + if (!rn) + return 0; + + /* Find same static route is the tree */ + for (si = rn->info; si; si = si->next) + if (type == si->type + && (!gate || ((afi == AFI_IP + && IPV4_ADDR_SAME(gate, &si->addr.ipv4)) + || (afi == AFI_IP6 + && IPV6_ADDR_SAME(gate, &si->addr.ipv6)))) + && (!ifindex || ifindex == si->ifindex) + && (!tag || (tag == si->tag)) + && (!snh_label->num_labels + || !memcmp(&si->snh_label, snh_label, + sizeof(struct static_nh_label)))) + break; + + /* Can't find static route. */ + if (!si) { + route_unlock_node(rn); + return 0; + } + + /* Install into rib. */ + static_uninstall_route(afi, safi, p, src_p, si); + + /* Unlink static route from linked list. */ + if (si->prev) + si->prev->next = si->next; + else + rn->info = si->next; + if (si->next) + si->next->prev = si->prev; + route_unlock_node(rn); + + /* Free static route configuration. */ + XFREE(MTYPE_STATIC_ROUTE, si); + + route_unlock_node(rn); + + return 1; } |