diff options
Diffstat (limited to 'isisd/isis_lsp.c')
| -rw-r--r-- | isisd/isis_lsp.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/isisd/isis_lsp.c b/isisd/isis_lsp.c index 90c7c0efb5..1af6f417dc 100644 --- a/isisd/isis_lsp.c +++ b/isisd/isis_lsp.c @@ -2046,6 +2046,160 @@ static int lsp_handle_adj_state_change(struct isis_adjacency *adj) return 0; } +/* + * Iterate over all IP reachability TLVs in a LSP (all fragments) of the given + * address-family and MT-ID. + */ +int isis_lsp_iterate_ip_reach(struct isis_lsp *lsp, int family, uint16_t mtid, + lsp_ip_reach_iter_cb cb, void *arg) +{ + bool pseudo_lsp = LSP_PSEUDO_ID(lsp->hdr.lsp_id); + struct isis_lsp *frag; + struct listnode *node; + + if (lsp->hdr.seqno == 0 || lsp->hdr.rem_lifetime == 0) + return LSP_ITER_CONTINUE; + + /* Parse main LSP. */ + if (lsp->tlvs) { + if (!fabricd && !pseudo_lsp && family == AF_INET + && mtid == ISIS_MT_IPV4_UNICAST) { + struct isis_item_list *reachs[] = { + &lsp->tlvs->oldstyle_ip_reach, + &lsp->tlvs->oldstyle_ip_reach_ext}; + + for (unsigned int i = 0; i < array_size(reachs); i++) { + struct isis_oldstyle_ip_reach *r; + + for (r = (struct isis_oldstyle_ip_reach *) + reachs[i] + ->head; + r; r = r->next) { + bool external = i ? true : false; + + if ((*cb)((struct prefix *)&r->prefix, + r->metric, external, NULL, + arg) + == LSP_ITER_STOP) + return LSP_ITER_STOP; + } + } + } + + if (!pseudo_lsp && family == AF_INET) { + struct isis_item_list *ipv4_reachs; + + if (mtid == ISIS_MT_IPV4_UNICAST) + ipv4_reachs = &lsp->tlvs->extended_ip_reach; + else + ipv4_reachs = isis_lookup_mt_items( + &lsp->tlvs->mt_ip_reach, mtid); + + struct isis_extended_ip_reach *r; + for (r = ipv4_reachs ? (struct isis_extended_ip_reach *) + ipv4_reachs->head + : NULL; + r; r = r->next) { + if ((*cb)((struct prefix *)&r->prefix, + r->metric, false, r->subtlvs, arg) + == LSP_ITER_STOP) + return LSP_ITER_STOP; + } + } + + if (!pseudo_lsp && family == AF_INET6) { + struct isis_item_list *ipv6_reachs; + struct isis_ipv6_reach *r; + + if (mtid == ISIS_MT_IPV4_UNICAST) + ipv6_reachs = &lsp->tlvs->ipv6_reach; + else + ipv6_reachs = isis_lookup_mt_items( + &lsp->tlvs->mt_ipv6_reach, mtid); + + for (r = ipv6_reachs ? (struct isis_ipv6_reach *) + ipv6_reachs->head + : NULL; + r; r = r->next) { + if ((*cb)((struct prefix *)&r->prefix, + r->metric, r->external, r->subtlvs, + arg) + == LSP_ITER_STOP) + return LSP_ITER_STOP; + } + } + } + + /* Parse LSP fragments. */ + for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { + if (!frag->tlvs) + continue; + + isis_lsp_iterate_ip_reach(frag, family, mtid, cb, arg); + } + + return LSP_ITER_CONTINUE; +} + +/* + * Iterate over all IS reachability TLVs in a LSP (all fragments) of the given + * MT-ID. + */ +int isis_lsp_iterate_is_reach(struct isis_lsp *lsp, uint16_t mtid, + lsp_is_reach_iter_cb cb, void *arg) +{ + bool pseudo_lsp = LSP_PSEUDO_ID(lsp->hdr.lsp_id); + struct isis_lsp *frag; + struct listnode *node; + struct isis_item *head; + struct isis_item_list *te_neighs; + + if (lsp->hdr.seqno == 0 || lsp->hdr.rem_lifetime == 0) + return LSP_ITER_CONTINUE; + + /* Parse main LSP. */ + if (lsp->tlvs) { + if (pseudo_lsp || mtid == ISIS_MT_IPV4_UNICAST) { + head = lsp->tlvs->oldstyle_reach.head; + for (struct isis_oldstyle_reach *reach = + (struct isis_oldstyle_reach *)head; + reach; reach = reach->next) { + if ((*cb)(reach->id, reach->metric, true, NULL, + arg) + == LSP_ITER_STOP) + return LSP_ITER_STOP; + } + } + + if (pseudo_lsp || mtid == ISIS_MT_IPV4_UNICAST) + te_neighs = &lsp->tlvs->extended_reach; + else + te_neighs = + isis_get_mt_items(&lsp->tlvs->mt_reach, mtid); + if (te_neighs) { + head = te_neighs->head; + for (struct isis_extended_reach *reach = + (struct isis_extended_reach *)head; + reach; reach = reach->next) { + if ((*cb)(reach->id, reach->metric, false, + reach->subtlvs, arg) + == LSP_ITER_STOP) + return LSP_ITER_STOP; + } + } + } + + /* Parse LSP fragments. */ + for (ALL_LIST_ELEMENTS_RO(lsp->lspu.frags, node, frag)) { + if (!frag->tlvs) + continue; + + isis_lsp_iterate_is_reach(frag, mtid, cb, arg); + } + + return LSP_ITER_CONTINUE; +} + void lsp_init(void) { hook_register(isis_adj_state_change_hook, |