/* * IS-IS Rout(e)ing protocol - isis_lsp.c * LSP processing * * Copyright (C) 2001,2002 Sampo Saaristo * Tampere University of Technology * Institute of Communications Engineering * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public Licenseas published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * * This program 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 this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include "linklist.h" #include "thread.h" #include "vty.h" #include "stream.h" #include "memory.h" #include "log.h" #include "prefix.h" #include "command.h" #include "hash.h" #include "if.h" #include "isisd/dict.h" #include "isisd/isis_constants.h" #include "isisd/isis_common.h" #include "isisd/isis_circuit.h" #include "isisd/isisd.h" #include "isisd/isis_tlv.h" #include "isisd/isis_lsp.h" #include "isisd/isis_pdu.h" #include "isisd/isis_dynhn.h" #include "isisd/isis_misc.h" #include "isisd/isis_flags.h" #include "isisd/iso_checksum.h" #include "isisd/isis_csm.h" #include "isisd/isis_adjacency.h" #include "isisd/isis_spf.h" #ifdef TOPOLOGY_GENERATE #include "spgrid.h" #endif #define LSP_MEMORY_PREASSIGN extern struct isis *isis; extern struct thread_master *master; extern struct in_addr router_id_zebra; /* staticly assigned vars for printing purposes */ char lsp_bits_string[200]; /* FIXME: enough ? */ int lsp_id_cmp (u_char * id1, u_char * id2) { return memcmp (id1, id2, ISIS_SYS_ID_LEN + 2); } dict_t * lsp_db_init (void) { dict_t *dict; dict = dict_create (DICTCOUNT_T_MAX, (dict_comp_t) lsp_id_cmp); return dict; } struct isis_lsp * lsp_search (u_char * id, dict_t * lspdb) { dnode_t *node; #ifdef EXTREME_DEBUG dnode_t *dn; zlog_debug ("searching db"); for (dn = dict_first (lspdb); dn; dn = dict_next (lspdb, dn)) { zlog_debug ("%s\t%pX", rawlspid_print ((char *) dnode_getkey (dn)), dnode_get (dn)); } #endif /* EXTREME DEBUG */ node = dict_lookup (lspdb, id); if (node) return (struct isis_lsp *) dnode_get (node); return NULL; } static void lsp_clear_data (struct isis_lsp *lsp) { if (!lsp) return; if (lsp->own_lsp) { if (lsp->tlv_data.nlpids) XFREE (MTYPE_ISIS_TLV, lsp->tlv_data.nlpids); if (lsp->tlv_data.hostname) XFREE (MTYPE_ISIS_TLV, lsp->tlv_data.hostname); } if (lsp->tlv_data.is_neighs) list_delete (lsp->tlv_data.is_neighs); if (lsp->tlv_data.area_addrs) list_delete (lsp->tlv_data.area_addrs); if (lsp->tlv_data.es_neighs) list_delete (lsp->tlv_data.es_neighs); if (lsp->tlv_data.ipv4_addrs) list_delete (lsp->tlv_data.ipv4_addrs); if (lsp->tlv_data.ipv4_int_reachs) list_delete (lsp->tlv_data.ipv4_int_reachs); if (lsp->tlv_data.ipv4_ext_reachs) list_delete (lsp->tlv_data.ipv4_ext_reachs); #ifdef HAVE_IPV6 if (lsp->tlv_data.ipv6_addrs) list_delete (lsp->tlv_data.ipv6_addrs); if (lsp->tlv_data.ipv6_reachs) list_delete (lsp->tlv_data.ipv6_reachs); #endif /* HAVE_IPV6 */ memset (&lsp->tlv_data, 0, sizeof (struct tlvs)); return; } static void lsp_destroy (struct isis_lsp *lsp) { if (!lsp) return; lsp_clear_data (lsp); if (LSP_FRAGMENT (lsp->lsp_header->lsp_id) == 0 && lsp->lspu.frags) { list_delete (lsp->lspu.frags); } if (lsp->pdu) stream_free (lsp->pdu); XFREE (MTYPE_ISIS_LSP, lsp); } void lsp_db_destroy (dict_t * lspdb) { dnode_t *dnode, *next; struct isis_lsp *lsp; dnode = dict_first (lspdb); while (dnode) { next = dict_next (lspdb, dnode); lsp = dnode_get (dnode); lsp_destroy (lsp); dict_delete_free (lspdb, dnode); dnode = next; } dict_free (lspdb); return; } /* * Remove all the frags belonging to the given lsp */ static void lsp_remove_frags (struct list *frags, dict_t * lspdb) { dnode_t *dnode; struct listnode *lnode, *lnnode; struct isis_lsp *lsp; for (ALL_LIST_ELEMENTS (frags, lnode, lnnode, lsp)) { dnode = dict_lookup (lspdb, lsp->lsp_header->lsp_id); lsp_destroy (lsp); dnode_destroy (dict_delete (lspdb, dnode)); } list_delete_all_node (frags); return; } void lsp_search_and_destroy (u_char * id, dict_t * lspdb) { dnode_t *node; struct isis_lsp *lsp; node = dict_lookup (lspdb, id); if (node) { node = dict_delete (lspdb, node); lsp = dnode_get (node); /* * If this is a zero lsp, remove all the frags now */ if (LSP_FRAGMENT (lsp->lsp_header->lsp_id) == 0) { if (lsp->lspu.frags) lsp_remove_frags (lsp->lspu.frags, lspdb); } else { /* * else just remove this frag, from the zero lsps' frag list */ if (lsp->lspu.zero_lsp && lsp->lspu.zero_lsp->lspu.frags) listnode_delete (lsp->lspu.zero_lsp->lspu.frags, lsp); } lsp_destroy (lsp); dnode_destroy (node); } } /* * Compares a LSP to given values * Params are given in net order */ int lsp_compare (char *areatag, struct isis_lsp *lsp, u_int32_t seq_num, u_int16_t checksum, u_int16_t rem_lifetime) { /* no point in double ntohl on seqnum */ if (lsp->lsp_header->seq_num == seq_num && lsp->lsp_header->checksum == checksum && /*comparing with 0, no need to do ntohl */ ((lsp->lsp_header->rem_lifetime == 0 && rem_lifetime == 0) || (lsp->lsp_header->rem_lifetime != 0 && rem_lifetime != 0))) { if (isis->debugs & DEBUG_SNP_PACKETS) { zlog_debug ("ISIS-Snp (%s): LSP %s seq 0x%08x, cksum 0x%04x," " lifetime %us", areatag, rawlspid_print (lsp->lsp_header->lsp_id), ntohl (lsp->lsp_header->seq_num), ntohs (lsp->lsp_header->checksum), ntohs (lsp->lsp_header->rem_lifetime)); zlog_debug ("ISIS-Snp (%s): is equal to ours seq 0x%08x," " cksum 0x%04x, lifetime %us", areatag, ntohl (seq_num), ntohs (checksum), ntohs (rem_lifetime)); } return LSP_EQUAL; } if (ntohl (seq_num) >= ntohl (lsp->lsp_header->seq_num)) { if (isis->debugs & DEBUG_SNP_PACKETS) { zlog_debug ("ISIS-Snp (%s): LSP %s seq 0x%08x, cksum 0x%04x," " lifetime %us", areatag, rawlspid_print (lsp->lsp_header->lsp_id), ntohl (seq_num), ntohs (checksum), ntohs (rem_lifetime)); zlog_debug ("ISIS-Snp (%s): is newer than ours seq 0x%08x, " "cksum 0x%04x, lifetime %us", areatag, ntohl (lsp->lsp_header->seq_num), ntohs (lsp->lsp_header->checksum), ntohs (lsp->lsp_header->rem_lifetime)); } return LSP_NEWER; } if (isis->debugs & DEBUG_SNP_PACKETS) { zlog_debug ("ISIS-Snp (%s): LSP %s seq 0x%08x, cksum 0x%04x, lifetime %us", areatag, rawlspid_print (lsp->lsp_header->lsp_id), ntohl (seq_num), ntohs (checksum), ntohs (rem_lifetime)); zlog_debug ("ISIS-Snp (%s): is older than ours seq 0x%08x," " cksum 0x%04x, lifetime %us", areatag, ntohl (lsp->lsp_header->seq_num), ntohs (lsp->lsp_header->checksum), ntohs (lsp->lsp_header->rem_lifetime)); } return LSP_OLDER; } void lsp_inc_seqnum (struct isis_lsp *lsp, u_int32_t seq_num) { u_int32_t newseq; if (seq_num == 0 || ntohl (lsp->lsp_header->seq_num) > seq_num) newseq = ntohl (lsp->lsp_header->seq_num) + 1; else newseq = seq_num++; lsp->lsp_header->seq_num = htonl (newseq); iso_csum_create (STREAM_DATA (lsp->pdu) + 12, ntohs (lsp->lsp_header->pdu_len) - 12, 12); return; } /* * Genetates checksum for LSP and its frags */ static void lsp_seqnum_update (struct isis_lsp *lsp0) { struct isis_lsp *lsp; struct listnode *node, *nnode; lsp_inc_seqnum (lsp0, 0); if (!lsp0->lspu.frags) return; for (ALL_LIST_ELEMENTS (lsp0->lspu.frags, node, nnode, lsp)) lsp_inc_seqnum (lsp, 0); return; } int isis_lsp_authinfo_check (struct stream *stream, struct isis_area *area, int pdulen, struct isis_passwd *passwd) { uint32_t expected = 0, found; struct tlvs tlvs; int retval = 0; expected |= TLVFLAG_AUTH_INFO; retval = parse_tlvs (area->area_tag, stream->data + ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN, pdulen - ISIS_FIXED_HDR_LEN - ISIS_LSP_HDR_LEN, &expected, &found, &tlvs); if (retval || !(found & TLVFLAG_AUTH_INFO)) return 1; /* Auth fail (parsing failed or no auth-tlv) */ return authentication_check (passwd, &tlvs.auth_info); } static void lsp_update_data (struct isis_lsp *lsp, struct stream *stream, struct isis_area *area) { uint32_t expected = 0, found; int retval; /* copying only the relevant part of our stream */ lsp->pdu = stream_dup (stream); /* setting pointers to the correct place */ lsp->isis_header = (struct isis_fixed_hdr *) (STREAM_DATA (lsp->pdu)); lsp->lsp_header = (struct isis_link_state_hdr *) (STREAM_DATA (lsp->pdu) + ISIS_FIXED_HDR_LEN); lsp->age_out = ZERO_AGE_LIFETIME; lsp->installed = time (NULL); /* * Get LSP data i.e. TLVs */ expected |= TLVFLAG_AUTH_INFO; expected |= TLVFLAG_AREA_ADDRS; expected |= TLVFLAG_IS_NEIGHS; if ((lsp->lsp_header->lsp_bits & 3) == 3) /* a level 2 LSP */ expected |= TLVFLAG_PARTITION_DESIG_LEVEL2_IS; expected |= TLVFLAG_NLPID; if (area->dynhostname) expected |= TLVFLAG_DYN_HOSTNAME; if (area->newmetric) { expected |= TLVFLAG_TE_IS_NEIGHS; expected |= TLVFLAG_TE_IPV4_REACHABILITY; expected |= TLVFLAG_TE_ROUTER_ID; } expected |= TLVFLAG_IPV4_ADDR; expected |= TLVFLAG_IPV4_INT_REACHABILITY; expected |= TLVFLAG_IPV4_EXT_REACHABILITY; #ifdef HAVE_IPV6 expected |= TLVFLAG_IPV6_ADDR; expected |= TLVFLAG_IPV6_REACHABILITY; #endif /* HAVE_IPV6 */ retval = parse_tlvs (area->area_tag, lsp->pdu->data + ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN, ntohs (lsp->lsp_header->pdu_len) - ISIS_FIXED_HDR_LEN - ISIS_LSP_HDR_LEN, &expected, &found, &lsp->tlv_data); if (found & TLVFLAG_DYN_HOSTNAME) { if (area->dynhostname) isis_dynhn_insert (lsp->lsp_header->lsp_id, lsp->tlv_data.hostname, (lsp->lsp_header->lsp_bits & LSPBIT_IST) == IS_LEVEL_1_AND_2 ? IS_LEVEL_2 : (lsp->lsp_header->lsp_bits & LSPBIT_IST)); } } void lsp_update (struct isis_lsp *lsp, struct isis_link_state_hdr *lsp_hdr, struct stream *stream, struct isis_area *area) { /* free the old lsp data */ XFREE (MTYPE_STREAM_DATA, lsp->pdu); lsp_clear_data (lsp); /* rebuild the lsp data */ lsp_update_data (lsp, stream, area); /* set the new values for lsp header */ memcpy (lsp->lsp_header, lsp_hdr, ISIS_LSP_HDR_LEN); } /* creation of LSP directly from what we received */ struct isis_lsp * lsp_new_from_stream_ptr (struct stream *stream, u_int16_t pdu_len, struct isis_lsp *lsp0, struct isis_area *area) { struct isis_lsp *lsp; lsp = XCALLOC (MTYPE_ISIS_LSP, sizeof (struct isis_lsp)); lsp_update_data (lsp, stream, area); if (lsp0 == NULL) { /* * zero lsp -> create the list for fragments */ lsp->lspu.frags = list_new (); } else { /* * a fragment -> set the backpointer and add this to zero lsps frag list */ lsp->lspu.zero_lsp = lsp0; listnode_add (lsp0->lspu.frags, lsp); } return lsp; } struct isis_lsp * lsp_new (u_char * lsp_id, u_int16_t rem_lifetime, u_int32_t seq_num, u_int8_t lsp_bits, u_int16_t checksum, int level) { struct isis_lsp *lsp; lsp = XCALLOC (MTYPE_ISIS_LSP, sizeof (struct isis_lsp)); if (!lsp) { /* FIXME: set lspdbol bit */ zlog_warn ("lsp_new(): out of memory"); return NULL; } #ifdef LSP_MEMORY_PREASSIGN lsp->pdu = stream_new (1514); /*Should be minimal mtu? yup... */ #else /* We need to do realloc on TLVs additions */ lsp->pdu = malloc (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); #endif /* LSP_MEMORY_PREASSIGN */ if (LSP_FRAGMENT (lsp_id) == 0) lsp->lspu.frags = list_new (); lsp->isis_header = (struct isis_fixed_hdr *) (STREAM_DATA (lsp->pdu)); lsp->lsp_header = (struct isis_link_state_hdr *) (STREAM_DATA (lsp->pdu) + ISIS_FIXED_HDR_LEN); /* at first we fill the FIXED HEADER */ (level == 1) ? fill_fixed_hdr (lsp->isis_header, L1_LINK_STATE) : fill_fixed_hdr (lsp->isis_header, L2_LINK_STATE); /* now for the LSP HEADER */ /* Minimal LSP PDU size */ lsp->lsp_header->pdu_len = htons (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); memcpy (lsp->lsp_header->lsp_id, lsp_id, ISIS_SYS_ID_LEN + 2); lsp->lsp_header->checksum = checksum; /* Provided in network order */ lsp->lsp_header->seq_num = htonl (seq_num); lsp->lsp_header->rem_lifetime = htons (rem_lifetime); lsp->lsp_header->lsp_bits = lsp_bits; lsp->level = level; lsp->age_out = ZERO_AGE_LIFETIME; stream_forward_endp (lsp->pdu, ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); if (isis->debugs & DEBUG_EVENTS) zlog_debug ("New LSP with ID %s-%02x-%02x seqnum %08x", sysid_print (lsp_id), LSP_PSEUDO_ID (lsp->lsp_header->lsp_id), LSP_FRAGMENT (lsp->lsp_header->lsp_id), ntohl (lsp->lsp_header->seq_num)); return lsp; } void lsp_insert (struct isis_lsp *lsp, dict_t * lspdb) { dict_alloc_insert (lspdb, lsp->lsp_header->lsp_id, lsp); } /* * Build a list of LSPs with non-zero ht bounded by start and stop ids */ void lsp_build_list_nonzero_ht (u_char * start_id, u_char * stop_id, struct list *list, dict_t * lspdb) { dnode_t *first, *last, *curr; first = dict_lower_bound (lspdb, start_id); if (!first) return; last = dict_upper_bound (lspdb, stop_id); curr = first; if (((struct isis_lsp *) (curr->dict_data))->lsp_header->rem_lifetime) listnode_add (list, first->dict_data); while (curr) { curr = dict_next (lspdb, curr); if (curr && ((struct isis_lsp *) (curr->dict_data))->lsp_header->rem_lifetime) listnode_add (list, curr->dict_data); if (curr == last) break; } return; } /* * Build a list of all LSPs bounded by start and stop ids */ void lsp_build_list (u_char * start_id, u_char * stop_id, struct list *list, dict_t * lspdb) { dnode_t *first, *last, *curr; first = dict_lower_bound (lspdb, start_id); if (!first) return; last = dict_upper_bound (lspdb, stop_id); curr = first; listnode_add (list, first->dict_data); while (curr) { curr = dict_next (lspdb, curr); if (curr) listnode_add (list, curr->dict_data); if (curr == last) break; } return; } /* * Build a list of LSPs with SSN flag set for the given circuit */ void lsp_build_list_ssn (struct isis_circuit *circuit, struct list *list, dict_t * lspdb) { dnode_t *dnode, *next; struct isis_lsp *lsp; dnode = dict_first (lspdb); while (dnode != NULL) { next = dict_next (lspdb, dnode); lsp = dnode_get (dnode); if (ISIS_CHECK_FLAG (lsp->SSNflags, circuit)) listnode_add (list, lsp); dnode = next; } return; } static void lsp_set_time (struct isis_lsp *lsp) { assert (lsp); if (lsp->lsp_header->rem_lifetime == 0) { if (lsp->age_out != 0) lsp->age_out--; return; } /* If we are turning 0 */ /* ISO 10589 - 7.3.16.4 first paragraph */ if (ntohs (lsp->lsp_header->rem_lifetime) == 1) { /* 7.3.16.4 a) set SRM flags on all */ ISIS_FLAGS_SET_ALL (lsp->SRMflags); /* 7.3.16.4 b) retain only the header FIXME */ /* 7.3.16.4 c) record the time to purge FIXME (other way to do it) */ } lsp->lsp_header->rem_lifetime = htons (ntohs (lsp->lsp_header->rem_lifetime) - 1); } static void lspid_print (u_char * lsp_id, u_char * trg, char dynhost, char frag) { struct isis_dynhn *dyn = NULL; u_char id[SYSID_STRLEN]; if (dynhost) dyn = dynhn_find_by_id (lsp_id); else dyn = NULL; if (dyn) sprintf ((char *)id, "%.14s", dyn->name.name); else if (!memcmp (isis->sysid, lsp_id, ISIS_SYS_ID_LEN) & dynhost) sprintf ((char *)id, "%.14s", unix_hostname ()); else { memcpy (id, sysid_print (lsp_id), 15); } if (frag) sprintf ((char *)trg, "%s.%02x-%02x", id, LSP_PSEUDO_ID (lsp_id), LSP_FRAGMENT (lsp_id)); else sprintf ((char *)trg, "%s.%02x", id, LSP_PSEUDO_ID (lsp_id)); } /* Convert the lsp attribute bits to attribute string */ const char * lsp_bits2string (u_char * lsp_bits) { char *pos = lsp_bits_string; if (!*lsp_bits) return " none"; /* we only focus on the default metric */ pos += sprintf (pos, "%d/", ISIS_MASK_LSP_ATT_DEFAULT_BIT (*lsp_bits) ? 1 : 0); pos += sprintf (pos, "%d/", ISIS_MASK_LSP_PARTITION_BIT (*lsp_bits) ? 1 : 0); pos += sprintf (pos, "%d", ISIS_MASK_LSP_OL_BIT (*lsp_bits) ? 1 : 0); *(pos) = '\0'; return lsp_bits_string; } /* this function prints the lsp on show isis database */ static void lsp_print (dnode_t * node, struct vty *vty, char dynhost) { struct isis_lsp *lsp = dnode_get (node); u_char LSPid[255]; lspid_print (lsp->lsp_header->lsp_id, LSPid, dynhost, 1); vty_out (vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' '); vty_out (vty, "0x%08x ", ntohl (lsp->lsp_header->seq_num)); vty_out (vty, "0x%04x ", ntohs (lsp->lsp_header->checksum)); if (ntohs (lsp->lsp_header->rem_lifetime) == 0) vty_out (vty, " (%2u)", lsp->age_out); else vty_out (vty, "%5u", ntohs (lsp->lsp_header->rem_lifetime)); vty_out (vty, " %s%s", lsp_bits2string (&lsp->lsp_header->lsp_bits), VTY_NEWLINE); } static void lsp_print_detail (dnode_t * node, struct vty *vty, char dynhost) { struct isis_lsp *lsp = dnode_get (node); struct area_addr *area_addr; int i; struct listnode *lnode, *lnnode; struct is_neigh *is_neigh; struct te_is_neigh *te_is_neigh; struct ipv4_reachability *ipv4_reach; struct in_addr *ipv4_addr; struct te_ipv4_reachability *te_ipv4_reach; #ifdef HAVE_IPV6 struct ipv6_reachability *ipv6_reach; struct in6_addr in6; #endif u_char LSPid[255]; u_char hostname[255]; u_char buff[BUFSIZ]; u_char ipv4_reach_prefix[20]; u_char ipv4_reach_mask[20]; u_char ipv4_address[20]; lspid_print (lsp->lsp_header->lsp_id, LSPid, dynhost, 1); lsp_print (node, vty, dynhost); /* for all area address */ if (lsp->tlv_data.area_addrs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.area_addrs, lnode, lnnode, area_addr)) { vty_out (vty, " Area Address: %s%s", isonet_print (area_addr->area_addr, area_addr->addr_len), VTY_NEWLINE); } /* for the nlpid tlv */ if (lsp->tlv_data.nlpids) { for (i = 0; i < lsp->tlv_data.nlpids->count; i++) { switch (lsp->tlv_data.nlpids->nlpids[i]) { case NLPID_IP: case NLPID_IPV6: vty_out (vty, " NLPID: 0x%X%s", lsp->tlv_data.nlpids->nlpids[i], VTY_NEWLINE); break; default: vty_out (vty, " NLPID: %s%s", "unknown", VTY_NEWLINE); break; } } } /* for the hostname tlv */ if (lsp->tlv_data.hostname) { bzero (hostname, sizeof (hostname)); memcpy (hostname, lsp->tlv_data.hostname->name, lsp->tlv_data.hostname->namelen); vty_out (vty, " Hostname: %s%s", hostname, VTY_NEWLINE); } if (lsp->tlv_data.ipv4_addrs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.ipv4_addrs, lnode, lnnode, ipv4_addr)) { memcpy (ipv4_address, inet_ntoa (*ipv4_addr), sizeof (ipv4_address)); vty_out (vty, " IP: %s%s", ipv4_address, VTY_NEWLINE); } /* TE router id */ if (lsp->tlv_data.router_id) { memcpy (ipv4_address, inet_ntoa (lsp->tlv_data.router_id->id), sizeof (ipv4_address)); vty_out (vty, " Router ID: %s%s", ipv4_address, VTY_NEWLINE); } /* for the IS neighbor tlv */ if (lsp->tlv_data.is_neighs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.is_neighs, lnode, lnnode, is_neigh)) { lspid_print (is_neigh->neigh_id, LSPid, dynhost, 0); vty_out (vty, " Metric: %d IS %s%s", is_neigh->metrics.metric_default, LSPid, VTY_NEWLINE); } /* for the internal reachable tlv */ if (lsp->tlv_data.ipv4_int_reachs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.ipv4_int_reachs, lnode, lnnode, ipv4_reach)) { memcpy (ipv4_reach_prefix, inet_ntoa (ipv4_reach->prefix), sizeof (ipv4_reach_prefix)); memcpy (ipv4_reach_mask, inet_ntoa (ipv4_reach->mask), sizeof (ipv4_reach_mask)); vty_out (vty, " Metric: %d IP %s %s%s", ipv4_reach->metrics.metric_default, ipv4_reach_prefix, ipv4_reach_mask, VTY_NEWLINE); } /* for the external reachable tlv */ if (lsp->tlv_data.ipv4_ext_reachs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.ipv4_ext_reachs, lnode, lnnode, ipv4_reach)) { memcpy (ipv4_reach_prefix, inet_ntoa (ipv4_reach->prefix), sizeof (ipv4_reach_prefix)); memcpy (ipv4_reach_mask, inet_ntoa (ipv4_reach->mask), sizeof (ipv4_reach_mask)); vty_out (vty, " Metric: %d IP-External %s %s%s", ipv4_reach->metrics.metric_default, ipv4_reach_prefix, ipv4_reach_mask, VTY_NEWLINE); } /* IPv6 tlv */ #ifdef HAVE_IPV6 if (lsp->tlv_data.ipv6_reachs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.ipv6_reachs, lnode, lnnode, ipv6_reach)) { memset (&in6, 0, sizeof (in6)); memcpy (in6.s6_addr, ipv6_reach->prefix, PSIZE (ipv6_reach->prefix_len)); inet_ntop (AF_INET6, &in6, (char *)buff, BUFSIZ); if ((ipv6_reach->control_info && CTRL_INFO_DISTRIBUTION) == DISTRIBUTION_INTERNAL) vty_out (vty, " Metric: %d IPv6-Intern %s/%d%s", ntohl (ipv6_reach->metric), buff, ipv6_reach->prefix_len, VTY_NEWLINE); else vty_out (vty, " Metric: %d IPv6-Extern %s/%d%s", ntohl (ipv6_reach->metric), buff, ipv6_reach->prefix_len, VTY_NEWLINE); } #endif /* TE IS neighbor tlv */ if (lsp->tlv_data.te_is_neighs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.te_is_neighs, lnode, lnnode, te_is_neigh)) { /* FIXME: metric display is wrong. */ lspid_print (te_is_neigh->neigh_id, LSPid, dynhost, 0); vty_out (vty, " Metric: %d extd-IS %s%s", te_is_neigh->te_metric[0], LSPid, VTY_NEWLINE); } /* TE IPv4 tlv */ if (lsp->tlv_data.te_ipv4_reachs) for (ALL_LIST_ELEMENTS (lsp->tlv_data.te_ipv4_reachs, lnode, lnnode, te_ipv4_reach)) { /* FIXME: There should be better way to output this stuff. */ vty_out (vty, " Metric: %d extd-IP %s/%d%s", ntohl (te_ipv4_reach->te_metric), inet_ntoa (newprefix2inaddr (&te_ipv4_reach->prefix_start, te_ipv4_reach->control)), te_ipv4_reach->control & 0x3F, VTY_NEWLINE); } return; } /* print all the lsps info in the local lspdb */ int lsp_print_all (struct vty *vty, dict_t * lspdb, char detail, char dynhost) { dnode_t *node = dict_first (lspdb), *next; int lsp_count = 0; /* print the title, for both modes */ vty_out (vty, "LSP ID LSP Seq Num LSP Checksum " "LSP Holdtime ATT/P/OL%s", VTY_NEWLINE); if (detail == ISIS_UI_LEVEL_BRIEF) { while (node != NULL) { /* I think it is unnecessary, so I comment it out */ /* dict_contains (lspdb, node); */ next = dict_next (lspdb, node); lsp_print (node, vty, dynhost); node = next; lsp_count++; } } else if (detail == ISIS_UI_LEVEL_DETAIL) { while (node != NULL) { next = dict_next (lspdb, node); lsp_print_detail (node, vty, dynhost); node = next; lsp_count++; } } return lsp_count; } /* this function reallocate memory to an lsp pdu, with an additional * size of memory, it scans the lsp and moves all pointers the * way they should */ static u_char * lsppdu_realloc (struct isis_lsp * lsp, int memorytype, int size) { u_char *retval; retval = STREAM_DATA (lsp->pdu) + ntohs (lsp->lsp_header->pdu_len); #ifdef LSP_MEMORY_PREASSIGN lsp->lsp_header->pdu_len = htons (ntohs (lsp->lsp_header->pdu_len) + size); return retval; #else /* otherwise we have to move all pointers */ u_char *newpdu; newpdu = stream_new (ntohs (lsp->lsp_header->pdu_len) + size); stream_put (newpdu, STREAM_DATA(lsp->pdu), ntohs (lsp->lsp_header->pdu_len)); XFREE (memorytype, lsp->pdu); lsp->pdu = newpdu; lsp->isis_header = (struct isis_fixed_hdr *) STREAM_DATA (lsp->pdu); lsp->lsp_header = (struct isis_link_state_hdr *) (STREAM_DATA (lsp->pdu) + ISIS_FIXED_HDR_LEN); htons (ntohs (lsp->lsp_header->pdu_len) += size); return STREAM_DATA (lsp->pdu) + (lsp->lsp_header->pdu_len - size); #endif /* LSP_MEMORY_PREASSIGN */ } #if 0 /* Saving the old one just in case :) */ /* * Builds the lsp->tlv_data * and writes the tlvs into lsp->pdu */ void lsp_build_nonpseudo (struct isis_lsp *lsp, struct isis_area *area) { struct is_neigh *is_neigh; struct listnode *node, *nnode, *ipnode, *ipnnode; int level = lsp->level; struct isis_circuit *circuit; struct prefix_ipv4 *ipv4; struct ipv4_reachability *ipreach; struct isis_adjacency *nei; #ifdef HAVE_IPV6 struct prefix_ipv6 *ipv6; struct ipv6_reachability *ip6reach; #endif /* HAVE_IPV6 */ /* * First add the tlvs related to area */ /* Area addresses */ if (lsp->tlv_data.area_addrs == NULL) lsp->tlv_data.area_addrs = list_new (); list_add_list (lsp->tlv_data.area_addrs, area->area_addrs); /* Protocols Supported */ if (area->ip_circuits > 0 #ifdef HAVE_IPV6 || area->ipv6_circuits > 0 #endif /* HAVE_IPV6 */ ) { lsp->tlv_data.nlpids = XMALLOC (MTYPE_ISIS_TLV, sizeof (struct nlpids)); lsp->tlv_data.nlpids->count = 0; if (area->ip_circuits > 0) { lsp->tlv_data.nlpids->count++; lsp->tlv_data.nlpids->nlpids[0] = NLPID_IP; } #ifdef HAVE_IPV6 if (area->ipv6_circuits > 0) { lsp->tlv_data.nlpids->count++; lsp->tlv_data.nlpids->nlpids[lsp->tlv_data.nlpids->count - 1] = NLPID_IPV6; } #endif /* HAVE_IPV6 */ } /* Dynamic Hostname */ if (area->dynhostname) { lsp->tlv_data.hostname = XMALLOC (MTYPE_ISIS_TLV, sizeof (struct hostname)); memcpy (&lsp->tlv_data.hostname->name, unix_hostname (), strlen (unix_hostname ())); lsp->tlv_data.hostname->namelen = strlen (unix_hostname ()); } #ifdef TOPOLOGY_GENERATE /* * If we have a topology in this area, we need to connect this lsp to * the first topology lsp */ if ((area->topology) && (level == 1)) { if (lsp->tlv_data.is_neighs == NULL) lsp->tlv_data.is_neighs = list_new (); is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh)); memcpy (&is_neigh->neigh_id, area->topology_baseis, ISIS_SYS_ID_LEN); /* connected to the first */ is_neigh->neigh_id[ISIS_SYS_ID_LEN - 1] = (0x01); /* this is actually the same system, why mess the SPT */ is_neigh->metrics.metric_default = 0; is_neigh->metrics.metric_delay = METRICS_UNSUPPORTED; is_neigh->metrics.metric_expense = METRICS_UNSUPPORTED; is_neigh->metrics.metric_error = METRICS_UNSUPPORTED; listnode_add (lsp->tlv_data.is_neighs, is_neigh); } #endif /* * Then add tlvs related to circuits */ for (ALL_LIST_ELEMENTS (area->circuit_list, node, nnode, circuit)) { if (circuit->state != C_STATE_UP) continue; /* * Add IPv4 internal reachability of this circuit */ if (circuit->ip_router && circuit->ip_addrs && circuit->ip_addrs->count > 0) { if (lsp->tlv_data.ipv4_int_reachs == NULL) { lsp->tlv_data.ipv4_int_reachs = list_new (); lsp->tlv_data.ipv4_int_reachs->del = free_tlv; } for (ALL_LIST_ELEMENTS (circuit->ip_addrs, ipnode, ipnnode, ipv4)) { ipreach = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct ipv4_reachability)); ipreach->metrics = circuit->metrics[level - 1]; ipreach->prefix = ipv4->prefix; masklen2ip (ipv4->prefixlen, &ipreach->mask); listnode_add (lsp->tlv_data.ipv4_int_reachs, ipreach); } } #ifdef HAVE_IPV6 /* * Add IPv6 reachability of this circuit */ if (circuit->ipv6_router && circuit->ipv6_non_link && circuit->ipv6_non_link->count > 0) { if (lsp->tlv_data.ipv6_reachs == NULL) { lsp->tlv_data.ipv6_reachs = list_new (); lsp->tlv_data.ipv6_reachs->del = free_tlv; } for (ALL_LIST_ELEMENTS (circuit->ipv6_non_link, ipnode, ipnnode, ipv6)) { ip6reach = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct ipv6_reachability)); ip6reach->metric = htonl (circuit->metrics[level - 1].metric_default); ip6reach->control_info = 0; ip6reach->prefix_len = ipv6->prefixlen; memcpy (&ip6reach->prefix, ipv6->prefix.s6_addr, (ipv6->prefixlen + 7) / 8); listnode_add (lsp->tlv_data.ipv6_reachs, ip6reach); } } #endif /* HAVE_IPV6 */ switch (circuit->circ_type) { case CIRCUIT_T_BROADCAST: if (level & circuit->circuit_is_type) { if (lsp->tlv_data.is_neighs == NULL) { lsp->tlv_data.is_neighs = list_new (); lsp->tlv_data.is_neighs->del = free_tlv; } is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh)); if (level == 1) memcpy (&is_neigh->neigh_id, circuit->u.bc.l1_desig_is, ISIS_SYS_ID_LEN + 1); else memcpy (&is_neigh->neigh_id, circuit->u.bc.l2_desig_is, ISIS_SYS_ID_LEN + 1); is_neigh->metrics = circuit->metrics[level - 1]; listnode_add (lsp->tlv_data.is_neighs, is_neigh); } break; case CIRCUIT_T_P2P: nei = circuit->u.p2p.neighbor; if (nei && (level & nei->circuit_t)) { if (lsp->tlv_data.is_neighs == NULL) { lsp->tlv_data.is_neighs = list_new (); lsp->tlv_data.is_neighs->del = free_tlv; } is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh)); memcpy (&is_neigh->neigh_id, nei->sysid, ISIS_SYS_ID_LEN); is_neigh->metrics = circuit->metrics[level - 1]; listnode_add (lsp->tlv_data.is_neighs, is_neigh); } break; case CIRCUIT_T_STATIC_IN: zlog_warn ("lsp_area_create: unsupported circuit type"); break; case CIRCUIT_T_STATIC_OUT: zlog_warn ("lsp_area_create: unsupported circuit type"); break; case CIRCUIT_T_DA: zlog_warn ("lsp_area_create: unsupported circuit type"); break; default: zlog_warn ("lsp_area_create: unknown circuit type"); } } if (lsp->tlv_data.nlpids) tlv_add_nlpid (lsp->tlv_data.nlpids, lsp->pdu); if (lsp->tlv_data.hostname) tlv_add_dynamic_hostname (lsp->tlv_data.hostname, lsp->pdu); if (lsp->tlv_data.area_addrs && listcount (lsp->tlv_data.area_addrs) > 0) tlv_add_area_addrs (lsp->tlv_data.area_addrs, lsp->pdu); if (lsp->tlv_data.is_neighs && listcount (lsp->tlv_data.is_neighs) > 0) tlv_add_is_neighs (lsp->tlv_data.is_neighs, lsp->pdu); if (lsp->tlv_data.ipv4_int_reachs && listcount (lsp->tlv_data.ipv4_int_reachs) > 0) tlv_add_ipv4_reachs (lsp->tlv_data.ipv4_int_reachs, lsp->pdu); #ifdef HAVE_IPV6 if (lsp->tlv_data.ipv6_reachs && listcount (lsp->tlv_data.ipv6_reachs) > 0) tlv_add_ipv6_reachs (lsp->tlv_data.ipv6_reachs, lsp->pdu); #endif /* HAVE_IPV6 */ lsp->lsp_header->pdu_len = htons (stream_get_endp (lsp->pdu)); return; } #endif #define FRAG_THOLD(S,T) \ ((STREAM_SIZE(S)*T)/100) /* stream*, area->lsp_frag_threshold, increment */ #define FRAG_NEEDED(S,T,I) \ (STREAM_SIZE(S)-STREAM_REMAIN(S)+(I) > FRAG_THOLD(S,T)) static void lsp_tlv_fit (struct isis_lsp *lsp, struct list **from, struct list **to, int tlvsize, int frag_thold, int tlv_build_func (struct list *, struct stream *)) { int count, i; /* can we fit all ? */ if (!FRAG_NEEDED (lsp->pdu, frag_thold, listcount (*from) * tlvsize + 2)) { tlv_build_func (*from, lsp->pdu); *to = *from; *from = NULL; } else if (!FRAG_NEEDED (lsp->pdu, frag_thold, tlvsize + 2)) { /* fit all we can */ count = FRAG_THOLD (lsp->pdu, frag_thold) - 2 - (STREAM_SIZE (lsp->pdu) - STREAM_REMAIN (lsp->pdu)); if (count) count = count / tlvsize; for (i = 0; i < count; i++) { listnode_add (*to, listgetdata (listhead (*from))); listnode_delete (*from, listgetdata (listhead (*from))); } tlv_build_func (*to, lsp->pdu); } lsp->lsp_header->pdu_len = htons (stream_get_endp (lsp->pdu)); return; } static struct isis_lsp * lsp_next_frag (u_char frag_num, struct isis_lsp *lsp0, struct isis_area *area, int level) { struct isis_lsp *lsp; u_char frag_id[ISIS_SYS_ID_LEN + 2]; memcpy (frag_id, lsp0->lsp_header->lsp_id, ISIS_SYS_ID_LEN + 1); LSP_FRAGMENT (frag_id) = frag_num; lsp = lsp_search (frag_id, area->lspdb[level - 1]); if (lsp) { /* * Clear the TLVs, but inherit the authinfo */ lsp_clear_data (lsp); if (lsp0->tlv_data.auth_info.type) { memcpy (&lsp->tlv_data.auth_info, &lsp->tlv_data.auth_info, sizeof (struct isis_passwd)); tlv_add_authinfo (lsp->tlv_data.auth_info.type, lsp->tlv_data.auth_info.len, lsp->tlv_data.auth_info.passwd, lsp->pdu); } return lsp; } lsp = lsp_new (frag_id, area->max_lsp_lifetime[level - 1], 0, area->is_type, 0, level); lsp->own_lsp = 1; lsp_insert (lsp, area->lspdb[level - 1]); listnode_add (lsp0->lspu.frags, lsp); lsp->lspu.zero_lsp = lsp0; /* * Copy the authinfo from zero LSP */ if (lsp0->tlv_data.auth_info.type) { memcpy (&lsp->tlv_data.auth_info, &lsp->tlv_data.auth_info, sizeof (struct isis_passwd)); tlv_add_authinfo (lsp->tlv_data.auth_info.type, lsp->tlv_data.auth_info.len, lsp->tlv_data.auth_info.passwd, lsp->pdu); } return lsp; } /* * Builds the LSP data part. This func creates a new frag whenever * area->lsp_frag_threshold is exceeded. */ #if 1 static void lsp_build_nonpseudo (struct isis_lsp *lsp, struct isis_area *area) { struct is_neigh *is_neigh; struct listnode *node, *nnode, *ipnode, *ipnnode; int level = lsp->level; struct isis_circuit *circuit; struct prefix_ipv4 *ipv4; struct ipv4_reachability *ipreach; struct isis_adjacency *nei; #ifdef HAVE_IPV6 struct prefix_ipv6 *ipv6, *ip6prefix; struct ipv6_reachability *ip6reach; #endif /* HAVE_IPV6 */ struct tlvs tlv_data; struct isis_lsp *lsp0 = lsp; struct isis_passwd *passwd; struct in_addr *routerid; /* * First add the tlvs related to area */ /* Area addresses */ if (lsp->tlv_data.area_addrs == NULL) lsp->tlv_data.area_addrs = list_new (); list_add_list (lsp->tlv_data.area_addrs, area->area_addrs); /* Protocols Supported */ if (area->ip_circuits > 0 #ifdef HAVE_IPV6 || area->ipv6_circuits > 0 #endif /* HAVE_IPV6 */ ) { lsp->tlv_data.nlpids = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct nlpids)); lsp->tlv_data.nlpids->count = 0; if (area->ip_circuits > 0) { lsp->tlv_data.nlpids->count++; lsp->tlv_data.nlpids->nlpids[0] = NLPID_IP; } #ifdef HAVE_IPV6 if (area->ipv6_circuits > 0) { lsp->tlv_data.nlpids->count++; lsp->tlv_data.nlpids->nlpids[lsp->tlv_data.nlpids->count - 1] = NLPID_IPV6; } #endif /* HAVE_IPV6 */ } /* Dynamic Hostname */ if (area->dynhostname) { lsp->tlv_data.hostname = XMALLOC (MTYPE_ISIS_TLV, sizeof (struct hostname)); memcpy (lsp->tlv_data.hostname->name, unix_hostname (), strlen (unix_hostname ())); lsp->tlv_data.hostname->namelen = strlen (unix_hostname ()); } /* * Building the zero lsp */ /* Reset stream endp. Stream is always there and on every LSP refresh only * TLV part of it is overwritten. So we must seek past header we will not * touch. */ stream_reset (lsp->pdu); stream_forward_endp (lsp->pdu, ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); /* * Add the authentication info if its present */ (level == 1) ? (passwd = &area->area_passwd) : (passwd = &area->domain_passwd); if (passwd->type) { memcpy (&lsp->tlv_data.auth_info, passwd, sizeof (struct isis_passwd)); tlv_add_authinfo (passwd->type, passwd->len, passwd->passwd, lsp->pdu); } if (lsp->tlv_data.nlpids) tlv_add_nlpid (lsp->tlv_data.nlpids, lsp->pdu); if (lsp->tlv_data.hostname) tlv_add_dynamic_hostname (lsp->tlv_data.hostname, lsp->pdu); if (lsp->tlv_data.area_addrs && listcount (lsp->tlv_data.area_addrs) > 0) tlv_add_area_addrs (lsp->tlv_data.area_addrs, lsp->pdu); memset (&tlv_data, 0, sizeof (struct tlvs)); /* * IPv4 address TLV. We don't follow "C" vendor, but "J" vendor behavior - * one IPv4 address is put into LSP and this address is same as router id. */ if (router_id_zebra.s_addr != 0) { if (lsp->tlv_data.ipv4_addrs == NULL) { lsp->tlv_data.ipv4_addrs = list_new (); lsp->tlv_data.ipv4_addrs->del = free_tlv; } routerid = XMALLOC (MTYPE_ISIS_TLV, sizeof (struct in_addr)); routerid->s_addr = router_id_zebra.s_addr; listnode_add (lsp->tlv_data.ipv4_addrs, routerid); /* * FIXME: Using add_tlv() directly is hack, but tlv_add_ip_addrs() * expects list of prefix_ipv4 structures, but we have list of * in_addr structures. */ add_tlv (IPV4_ADDR, IPV4_MAX_BYTELEN, (u_char *) &routerid->s_addr, lsp->pdu); } /* * Then build lists of tlvs related to circuits */ for (ALL_LIST_ELEMENTS (area->circuit_list, node, nnode, circuit)) { if (circuit->state != C_STATE_UP) continue; /* * Add IPv4 internal reachability of this circuit */ if (circuit->ip_router && circuit->ip_addrs && circuit->ip_addrs->count > 0) { if (tlv_data.ipv4_int_reachs == NULL) { tlv_data.ipv4_int_reachs = list_new (); tlv_data.ipv4_int_reachs->del = free_tlv; } for (ALL_LIST_ELEMENTS (circuit->ip_addrs, ipnode, ipnnode, ipv4)) { ipreach = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct ipv4_reachability)); ipreach->metrics = circuit->metrics[level - 1]; masklen2ip (ipv4->prefixlen, &ipreach->mask); ipreach->prefix.s_addr = ((ipreach->mask.s_addr) & (ipv4->prefix.s_addr)); listnode_add (tlv_data.ipv4_int_reachs, ipreach); } } #ifdef HAVE_IPV6 /* * Add IPv6 reachability of this circuit */ if (circuit->ipv6_router && circuit->ipv6_non_link && circuit->ipv6_non_link->count > 0) { if (tlv_data.ipv6_reachs == NULL) { tlv_data.ipv6_reachs = list_new (); tlv_data.ipv6_reachs->del = free_tlv; } for (ALL_LIST_ELEMENTS (circuit->ipv6_non_link, ipnode, ipnnode, ipv6)) { ip6reach = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct ipv6_reachability)); ip6reach->metric = htonl (circuit->metrics[level - 1].metric_default); ip6reach->control_info = 0; ip6reach->prefix_len = ipv6->prefixlen; memcpy (&ip6prefix, &ipv6, sizeof(ip6prefix)); apply_mask_ipv6 (ip6prefix); memcpy (ip6reach->prefix, ip6prefix->prefix.s6_addr, sizeof (ip6reach->prefix)); listnode_add (tlv_data.ipv6_reachs, ip6reach); } } #endif /* HAVE_IPV6 */ switch (circuit->circ_type) { case CIRCUIT_T_BROADCAST: if (level & circuit->circuit_is_type) { if (tlv_data.is_neighs == NULL) { tlv_data.is_neighs = list_new (); tlv_data.is_neighs->del = free_tlv; } is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh)); if (level == 1) memcpy (is_neigh->neigh_id, circuit->u.bc.l1_desig_is, ISIS_SYS_ID_LEN + 1); else memcpy (is_neigh->neigh_id, circuit->u.bc.l2_desig_is, ISIS_SYS_ID_LEN + 1); is_neigh->metrics = circuit->metrics[level - 1]; listnode_add (tlv_data.is_neighs, is_neigh); } break; case CIRCUIT_T_P2P: nei = circuit->u.p2p.neighbor; if (nei && (level & nei->circuit_t)) { if (tlv_data.is_neighs == NULL) { tlv_data.is_neighs = list_new (); tlv_data.is_neighs->del = free_tlv; } is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh)); memcpy (is_neigh->neigh_id, nei->sysid, ISIS_SYS_ID_LEN); is_neigh->metrics = circuit->metrics[level - 1]; listnode_add (tlv_data.is_neighs, is_neigh); } break; case CIRCUIT_T_STATIC_IN: zlog_warn ("lsp_area_create: unsupported circuit type"); break; case CIRCUIT_T_STATIC_OUT: zlog_warn ("lsp_area_create: unsupported circuit type"); break; case CIRCUIT_T_DA: zlog_warn ("lsp_area_create: unsupported circuit type"); break; default: zlog_warn ("lsp_area_create: unknown circuit type"); } } while (tlv_data.ipv4_int_reachs && listcount (tlv_data.ipv4_int_reachs)) { if (lsp->tlv_data.ipv4_int_reachs == NULL) lsp->tlv_data.ipv4_int_reachs = list_new (); lsp_tlv_fit (lsp, &tlv_data.ipv4_int_reachs, &lsp->tlv_data.ipv4_int_reachs, IPV4_REACH_LEN, area->lsp_frag_threshold, tlv_add_ipv4_reachs); if (tlv_data.ipv4_int_reachs && listcount (tlv_data.ipv4_int_reachs)) lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1, lsp0, area, level); } #ifdef HAVE_IPV6 while (tlv_data.ipv6_reachs && listcount (tlv_data.ipv6_reachs)) { if (lsp->tlv_data.ipv6_reachs == NULL) lsp->tlv_data.ipv6_reachs = list_new (); lsp_tlv_fit (lsp, &tlv_data.ipv6_reachs, &lsp->tlv_data.ipv6_reachs, IPV6_REACH_LEN, area->lsp_frag_threshold, tlv_add_ipv6_reachs); if (tlv_data.ipv6_reachs && listcount (tlv_data.ipv6_reachs)) lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1, lsp0, area, level); } #endif /* HAVE_IPV6 */ while (tlv_data.is_neighs && listcount (tlv_data.is_neighs)) { if (lsp->tlv_data.is_neighs == NULL) lsp->tlv_data.is_neighs = list_new (); lsp_tlv_fit (lsp, &tlv_data.is_neighs, &lsp->tlv_data.is_neighs, IS_NEIGHBOURS_LEN, area->lsp_frag_threshold, tlv_add_is_neighs); if (tlv_data.is_neighs && listcount (tlv_data.is_neighs)) lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1, lsp0, area, level); } return; } #endif #if 0 /* Old code? */ static void build_lsp_data (struct isis_lsp *lsp, struct isis_area *area) { struct list *circuit_list = area->circuit_list; struct isis_circuit *circuit; u_char *tlv_ptr; struct is_neigh *is_neigh; /* add our nlpids */ /* the 2 is for the TL plus 1 for the nlpid */ tlv_ptr = lsppdu_realloc (lsp, MTYPE_ISIS_TLV, 3); *tlv_ptr = PROTOCOLS_SUPPORTED; /* Type */ *(tlv_ptr + 1) = 1; /* one protocol */ #ifdef HAVE_IPV6 /*dunno if its right */ *(tlv_ptr + 2) = NLPID_IPV6; #else *(tlv_ptr + 2) = NLPID_IP; #endif /* HAVE_IPV6 */ /* we should add our areas here * FIXME: we need to figure out which should be added? Adj? All? First? */ /* first, lets add ourselves to the IS neighbours info */ /* the 2 is for the TL plus 1 for the virtual field */ tlv_ptr = lsppdu_realloc (lsp, MTYPE_ISIS_TLV, 3); *tlv_ptr = IS_NEIGHBOURS; /* Type */ *(tlv_ptr + 2) = 0; /* virtual is zero */ lsp->tlv_data.is_neighs = list_new (); /* new list of is_neighbours */ /* assign space for the is_neigh at the pdu end */ is_neigh = (struct is_neigh *) lsppdu_realloc (lsp, MTYPE_ISIS_TLV, sizeof (struct is_neigh)); /* add this node to our list */ listnode_add (lsp->tlv_data.is_neighs, is_neigh); /* FIXME: Do we need our designated address here? */ memcpy (&is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN + 1); /* FIXME: Where should we really get our own LSPs metrics from? */ circuit = (struct isis_circuit *) listhead (circuit_list); /* is_neigh->metrics = circuit->metrics[lsp->level -1]; */ /* Length */ *(tlv_ptr + 1) = (lsp->tlv_data.is_neighs->count * sizeof (struct is_neigh) + 1); /* FIXME: scan for adjencecies and add them */ /* FIXME: add reachability info */ /* adding dynamic hostname if needed */ if (area->dynhostname) { tlv_ptr = lsppdu_realloc (lsp, MTYPE_ISIS_TLV, 2); /* the 2 is for the TL */ *tlv_ptr = DYNAMIC_HOSTNAME; /* Type */ *(tlv_ptr + 1) = strlen (unix_hostname ()); /* Length */ lsp->tlv_data.hostname = (struct hostname *) (lsppdu_realloc (lsp, MTYPE_ISIS_TLV, /* the -1 is to fit the length in the struct */ strlen (unix_hostname ())) - 1); memcpy (lsp->tlv_data.hostname->name, unix_hostname (), strlen (unix_hostname ())); } } #endif /* 0 */ /* * 7.3.7 Generation on non-pseudonode LSPs */ static int lsp_generate_non_pseudo (struct isis_area *area, int level) { struct isis_lsp *oldlsp, *newlsp; u_int32_t seq_num = 0; u_char lspid[ISIS_SYS_ID_LEN + 2]; memset (&lspid, 0, ISIS_SYS_ID_LEN + 2); memcpy (&lspid, isis->sysid, ISIS_SYS_ID_LEN); /* only builds the lsp if the area shares the level */ if ((area->is_type & level) == level) { oldlsp = lsp_search (lspid, area->lspdb[level - 1]); if (oldlsp) { seq_num = ntohl (oldlsp->lsp_header->seq_num); lsp_search_and_destroy (oldlsp->lsp_header->lsp_id, area->lspdb[level - 1]); /* FIXME: we should actually initiate a purge */ } newlsp = lsp_new (lspid, area->max_lsp_lifetime[level - 1], seq_num, area->is_type, 0, level); newlsp->own_lsp = 1; lsp_insert (newlsp, area->lspdb[level - 1]); /* build_lsp_data (newlsp, area); */ lsp_build_nonpseudo (newlsp, area); /* time to calculate our checksum */ lsp_seqnum_update (newlsp); } /* DEBUG_ADJ_PACKETS */ if (isis->debugs & DEBUG_ADJ_PACKETS) { /* FIXME: is this place right? fix missing info */ zlog_debug ("ISIS-Upd (%s): Building L%d LSP", area->area_tag, level); } return ISIS_OK; } /* * 7.3.9 Generation of level 1 LSPs (non-pseudonode) */ int lsp_l1_generate (struct isis_area *area) { THREAD_TIMER_ON (master, area->t_lsp_refresh[0], lsp_refresh_l1, area, MAX_LSP_GEN_INTERVAL); return lsp_generate_non_pseudo (area, 1); } /* * 7.3.9 Generation of level 2 LSPs (non-pseudonode) */ int lsp_l2_generate (struct isis_area *area) { THREAD_TIMER_ON (master, area->t_lsp_refresh[1], lsp_refresh_l2, area, MAX_LSP_GEN_INTERVAL); return lsp_generate_non_pseudo (area, 2); } static int lsp_non_pseudo_regenerate (struct isis_area *area, int level) { dict_t *lspdb = area->lspdb[level - 1]; struct isis_lsp *lsp, *frag; struct listnode *node; u_char lspid[ISIS_SYS_ID_LEN + 2]; memset (lspid, 0, ISIS_SYS_ID_LEN + 2); memcpy (lspid, isis->sysid, ISIS_SYS_ID_LEN); lsp = lsp_search (lspid, lspdb); if (!lsp) { zlog_err ("ISIS-Upd (%s): lsp_non_pseudo_regenerate(): no L%d LSP found!", area->area_tag, level); return ISIS_ERROR; } lsp_clear_data (lsp); lsp_build_nonpseudo (lsp, area); lsp->lsp_header->rem_lifetime = htons (isis_jitter (area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER)); lsp_seqnum_update (lsp); if (isis->debugs & DEBUG_UPDATE_PACKETS) { zlog_debug ("ISIS-Upd (%s): refreshing our L%d LSP %s, " "seq 0x%08x, cksum 0x%04x lifetime %us", area->area_tag, level, rawlspid_print (lsp->lsp_header->lsp_id), ntohl (lsp->lsp_header->seq_num), ntohs (lsp->lsp_header->checksum), ntohs (lsp->lsp_header->rem_lifetime)); } lsp->last_generated = time (NULL); area->lsp_regenerate_pending[level - 1] = 0; ISIS_FLAGS_SET_ALL (lsp->SRMflags); for (ALL_LIST_ELEMENTS_RO (lsp->lspu.frags, node, frag)) { frag->lsp_header->rem_lifetime = htons (isis_jitter (area-> max_lsp_lifetime[level - 1], MAX_AGE_JITTER)); ISIS_FLAGS_SET_ALL (frag->SRMflags); } if (area->ip_circuits) isis_spf_schedule (area, level); #ifdef HAVE_IPV6 if (area->ipv6_circuits) isis_spf_schedule6 (area, level); #endif return ISIS_OK; } /* * Done at least every MAX_LSP_GEN_INTERVAL. Search own LSPs, update holding * time and set SRM */ int lsp_refresh_l1 (struct thread *thread) { struct isis_area *area; unsigned long ref_time; area = THREAD_ARG (thread); assert (area); area->t_lsp_refresh[0] = NULL; if (area->is_type & IS_LEVEL_1) lsp_non_pseudo_regenerate (area, 1); ref_time = area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ? MAX_LSP_GEN_INTERVAL : area->lsp_refresh[0]; THREAD_TIMER_ON (master, area->t_lsp_refresh[0], lsp_refresh_l1, area, isis_jitter (ref_time, MAX_AGE_JITTER)); return ISIS_OK; } int lsp_refresh_l2 (struct thread *thread) { struct isis_area *area; unsigned long ref_time; area = THREAD_ARG (thread); assert (area); area->t_lsp_refresh[1] = NULL; if (area->is_type & IS_LEVEL_2) lsp_non_pseudo_regenerate (area, 2); ref_time = area->lsp_refresh[1] > MAX_LSP_GEN_INTERVAL ? MAX_LSP_GEN_INTERVAL : area->lsp_refresh[1]; THREAD_TIMER_ON (master, area->t_lsp_refresh[1], lsp_refresh_l2, area, isis_jitter (ref_time, MAX_AGE_JITTER)); return ISIS_OK; } /* * Something has changed -> regenerate LSP */ static int lsp_l1_regenerate (struct thread *thread) { struct isis_area *area; area = THREAD_ARG (thread); area->lsp_regenerate_pending[0] = 0; return lsp_non_pseudo_regenerate (area, 1); } static int lsp_l2_regenerate (struct thread *thread) { struct isis_area *area; area = THREAD_ARG (thread); area->lsp_regenerate_pending[1] = 0; return lsp_non_pseudo_regenerate (area, 2); } int lsp_regenerate_schedule (struct isis_area *area) { struct isis_lsp *lsp; u_char id[ISIS_SYS_ID_LEN + 2]; time_t now, diff; memcpy (id, isis->sysid, ISIS_SYS_ID_LEN); LSP_PSEUDO_ID (id) = LSP_FRAGMENT (id) = 0; now = time (NULL); /* * First level 1 */ if (area->is_type & IS_LEVEL_1) { lsp = lsp_search (id, area->lspdb[0]); if (!lsp || area->lsp_regenerate_pending[0]) goto L2; /* * Throttle avoidance */ diff = now - lsp->last_generated; if (diff < MIN_LSP_GEN_INTERVAL) { area->lsp_regenerate_pending[0] = 1; thread_add_timer (master, lsp_l1_regenerate, area, MIN_LSP_GEN_INTERVAL - diff); goto L2; } else lsp_non_pseudo_regenerate (area, 1); } /* * then 2 */ L2: if (area->is_type & IS_LEVEL_2) { lsp = lsp_search (id, area->lspdb[1]); if (!lsp || area->lsp_regenerate_pending[1]) return ISIS_OK; /* * Throttle avoidance */ diff = now - lsp->last_generated; if (diff < MIN_LSP_GEN_INTERVAL) { area->lsp_regenerate_pending[1] = 1; thread_add_timer (master, lsp_l2_regenerate, area, MIN_LSP_GEN_INTERVAL - diff); return ISIS_OK; } else lsp_non_pseudo_regenerate (area, 2); } return ISIS_OK; } /* * Funcs for pseudonode LSPs */ /* * 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs */ static void lsp_build_pseudo (struct isis_lsp *lsp, struct isis_circuit *circuit, int level) { struct isis_adjacency *adj; struct is_neigh *is_neigh; struct es_neigh *es_neigh; struct list *adj_list; struct listnode *node, *nnode; struct isis_passwd *passwd; assert (circuit); assert (circuit->circ_type == CIRCUIT_T_BROADCAST); if (!circuit->u.bc.is_dr[level - 1]) return; /* we are not DIS on this circuit */ lsp->level = level; if (level == 1) lsp->lsp_header->lsp_bits |= IS_LEVEL_1; else lsp->lsp_header->lsp_bits |= IS_LEVEL_2; /* * add self to IS neighbours */ if (lsp->tlv_data.is_neighs == NULL) { lsp->tlv_data.is_neighs = list_new (); lsp->tlv_data.is_neighs->del = free_tlv; } is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh)); memcpy (&is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN); listnode_add (lsp->tlv_data.is_neighs, is_neigh); adj_list = list_new (); isis_adj_build_up_list (circuit->u.bc.adjdb[level - 1], adj_list); for (ALL_LIST_ELEMENTS (adj_list, node, nnode, adj)) { if (adj->circuit_t & level) { if ((level == 1 && adj->sys_type == ISIS_SYSTYPE_L1_IS) || (level == 1 && adj->sys_type == ISIS_SYSTYPE_L2_IS && adj->adj_usage == ISIS_ADJ_LEVEL1AND2) || (level == 2 && adj->sys_type == ISIS_SYSTYPE_L2_IS)) { /* an IS neighbour -> add it */ is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh)); memcpy (&is_neigh->neigh_id, adj->sysid, ISIS_SYS_ID_LEN); listnode_add (lsp->tlv_data.is_neighs, is_neigh); } else if (level == 1 && adj->sys_type == ISIS_SYSTYPE_ES) { /* an ES neigbour add it, if we are building level 1 LSP */ /* FIXME: the tlv-format is hard to use here */ if (lsp->tlv_data.es_neighs == NULL) { lsp->tlv_data.es_neighs = list_new (); lsp->tlv_data.es_neighs->del = free_tlv; } es_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct es_neigh)); memcpy (&es_neigh->first_es_neigh, adj->sysid, ISIS_SYS_ID_LEN); listnode_add (lsp->tlv_data.es_neighs, es_neigh); } } } /* Reset endp of stream to overwrite only TLV part of it. */ stream_reset (lsp->pdu); stream_forward_endp (lsp->pdu, ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); /* * Add the authentication info if it's present */ (level == 1) ? (passwd = &circuit->area->area_passwd) : (passwd = &circuit->area->domain_passwd); if (passwd->type) { memcpy (&lsp->tlv_data.auth_info, passwd, sizeof (struct isis_passwd)); tlv_add_authinfo (passwd->type, passwd->len, passwd->passwd, lsp->pdu); } if (lsp->tlv_data.is_neighs && listcount (lsp->tlv_data.is_neighs) > 0) tlv_add_is_neighs (lsp->tlv_data.is_neighs, lsp->pdu); if (lsp->tlv_data.es_neighs && listcount (lsp->tlv_data.es_neighs) > 0) tlv_add_is_neighs (lsp->tlv_data.es_neighs, lsp->pdu); lsp->lsp_header->pdu_len = htons (stream_get_endp (lsp->pdu)); iso_csum_create (STREAM_DATA (lsp->pdu) + 12, ntohs (lsp->lsp_header->pdu_len) - 12, 12); list_delete (adj_list); return; } static int lsp_pseudo_regenerate (struct isis_circuit *circuit, int level) { dict_t *lspdb = circuit->area->lspdb[level - 1]; struct isis_lsp *lsp; u_char lsp_id[ISIS_SYS_ID_LEN + 2]; memcpy (lsp_id, isis->sysid, ISIS_SYS_ID_LEN); LSP_PSEUDO_ID (lsp_id) = circuit->circuit_id; LSP_FRAGMENT (lsp_id) = 0; lsp = lsp_search (lsp_id, lspdb); if (!lsp) { zlog_err ("lsp_pseudo_regenerate(): no l%d LSP %s found!", level, rawlspid_print (lsp_id)); return ISIS_ERROR; } lsp_clear_data (lsp); lsp_build_pseudo (lsp, circuit, level); lsp->lsp_header->rem_lifetime = htons (isis_jitter (circuit->area->max_lsp_lifetime[level - 1], MAX_AGE_JITTER)); lsp_inc_seqnum (lsp, 0); if (isis->debugs & DEBUG_UPDATE_PACKETS) { zlog_debug ("ISIS-Upd (%s): refreshing pseudo LSP L%d %s", circuit->area->area_tag, level, rawlspid_print (lsp->lsp_header->lsp_id)); } lsp->last_generated = time (NULL); ISIS_FLAGS_SET_ALL (lsp->SRMflags); return ISIS_OK; } int lsp_l1_refresh_pseudo (struct thread *thread) { struct isis_circuit *circuit; int retval; unsigned long ref_time; circuit = THREAD_ARG (thread); if (!circuit->u.bc.is_dr[0]) return ISIS_ERROR; /* FIXME: purge and such */ circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL; retval = lsp_pseudo_regenerate (circuit, 1); ref_time = circuit->area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ? MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[0]; THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[0], lsp_l1_refresh_pseudo, circuit, isis_jitter (ref_time, MAX_AGE_JITTER)); return retval; } int lsp_l1_pseudo_generate (struct isis_circuit *circuit) { struct isis_lsp *lsp; u_char id[ISIS_SYS_ID_LEN + 2]; unsigned long ref_time; memcpy (id, isis->sysid, ISIS_SYS_ID_LEN); LSP_FRAGMENT (id) = 0; LSP_PSEUDO_ID (id) = circuit->circuit_id; /* * If for some reason have a pseudo LSP in the db already -> regenerate */ if (lsp_search (id, circuit->area->lspdb[0])) return lsp_pseudo_regenerate (circuit, 1); lsp = lsp_new (id, circuit->area->max_lsp_lifetime[0], 1, circuit->area->is_type, 0, 1); lsp_build_pseudo (lsp, circuit, 1); lsp->own_lsp = 1; lsp_insert (lsp, circuit->area->lspdb[0]); ISIS_FLAGS_SET_ALL (lsp->SRMflags); ref_time = circuit->area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ? MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[0]; THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[0], lsp_l1_refresh_pseudo, circuit, isis_jitter (ref_time, MAX_AGE_JITTER)); return lsp_regenerate_schedule (circuit->area); } int lsp_l2_refresh_pseudo (struct thread *thread) { struct isis_circuit *circuit; int retval; unsigned long ref_time; circuit = THREAD_ARG (thread); if (!circuit->u.bc.is_dr[1]) return ISIS_ERROR; /* FIXME: purge and such */ circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL; retval = lsp_pseudo_regenerate (circuit, 2); ref_time = circuit->area->lsp_refresh[1] > MAX_LSP_GEN_INTERVAL ? MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[1]; THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[1], lsp_l2_refresh_pseudo, circuit, isis_jitter (ref_time, MAX_AGE_JITTER)); return retval; } int lsp_l2_pseudo_generate (struct isis_circuit *circuit) { struct isis_lsp *lsp; u_char id[ISIS_SYS_ID_LEN + 2]; unsigned long ref_time; memcpy (id, isis->sysid, ISIS_SYS_ID_LEN); LSP_FRAGMENT (id) = 0; LSP_PSEUDO_ID (id) = circuit->circuit_id; if (lsp_search (id, circuit->area->lspdb[1])) return lsp_pseudo_regenerate (circuit, 2); lsp = lsp_new (id, circuit->area->max_lsp_lifetime[1], 1, circuit->area->is_type, 0, 2); lsp_build_pseudo (lsp, circuit, 2); ref_time = circuit->area->lsp_refresh[1] > MAX_LSP_GEN_INTERVAL ? MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[1]; lsp->own_lsp = 1; lsp_insert (lsp, circuit->area->lspdb[1]); ISIS_FLAGS_SET_ALL (lsp->SRMflags); THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[1], lsp_l2_refresh_pseudo, circuit, isis_jitter (ref_time, MAX_AGE_JITTER)); return lsp_regenerate_schedule (circuit->area); } /* * Walk through LSPs for an area * - set remaining lifetime * - set LSPs with SRMflag set for sending */ int lsp_tick (struct thread *thread) { struct isis_area *area; struct isis_circuit *circuit; struct isis_lsp *lsp; struct list *lsp_list; struct listnode *lspnode, *lspnnode, *cnode; dnode_t *dnode, *dnode_next; int level; lsp_list = list_new (); area = THREAD_ARG (thread); assert (area); area->t_tick = NULL; THREAD_TIMER_ON (master, area->t_tick, lsp_tick, area, 1); /* * Build a list of LSPs with (any) SRMflag set * and removed the ones that have aged out */ for (level = 0; level < ISIS_LEVELS; level++) { if (area->lspdb[level] && dict_count (area->lspdb[level]) > 0) { dnode = dict_first (area->lspdb[level]); while (dnode != NULL) { dnode_next = dict_next (area->lspdb[level], dnode); lsp = dnode_get (dnode); lsp_set_time (lsp); if (lsp->age_out == 0) { zlog_debug ("ISIS-Upd (%s): L%u LSP %s seq 0x%08x aged out", area->area_tag, lsp->level, rawlspid_print (lsp->lsp_header->lsp_id), ntohl (lsp->lsp_header->seq_num)); lsp_destroy (lsp); dict_delete (area->lspdb[level], dnode); } else if (flags_any_set (lsp->SRMflags)) listnode_add (lsp_list, lsp); dnode = dnode_next; } /* * Send LSPs on circuits indicated by the SRMflags */ if (listcount (lsp_list) > 0) { for (ALL_LIST_ELEMENTS_RO (area->circuit_list, cnode, circuit)) { for (ALL_LIST_ELEMENTS (lsp_list, lspnode, lspnnode, lsp)) { if (ISIS_CHECK_FLAG (lsp->SRMflags, circuit)) { /* FIXME: if same or elder lsp is already in lsp * queue */ listnode_add (circuit->lsp_queue, lsp); thread_add_event (master, send_lsp, circuit, 0); } } } } list_delete_all_node (lsp_list); } } list_delete (lsp_list); return ISIS_OK; } void lsp_purge_dr (u_char * id, struct isis_circuit *circuit, int level) { struct isis_lsp *lsp; lsp = lsp_search (id, circuit->area->lspdb[level - 1]); if (lsp && lsp->purged == 0) { lsp->lsp_header->rem_lifetime = htons (0); lsp->lsp_header->pdu_len = htons (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); lsp->purged = 0; iso_csum_create (STREAM_DATA (lsp->pdu) + 12, ntohs (lsp->lsp_header->pdu_len) - 12, 12); ISIS_FLAGS_SET_ALL (lsp->SRMflags); } return; } /* * Purge own LSP that is received and we don't have. * -> Do as in 7.3.16.4 */ void lsp_purge_non_exist (struct isis_link_state_hdr *lsp_hdr, struct isis_area *area) { struct isis_lsp *lsp; /* * We need to create the LSP to be purged */ zlog_debug ("LSP PURGE NON EXIST"); lsp = XCALLOC (MTYPE_ISIS_LSP, sizeof (struct isis_lsp)); /*FIXME: BUG BUG BUG! the lsp doesn't exist here! */ /*did smt here, maybe good probably not */ lsp->level = ((lsp_hdr->lsp_bits & LSPBIT_IST) == IS_LEVEL_1) ? 1 : 2; lsp->pdu = stream_new (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); lsp->isis_header = (struct isis_fixed_hdr *) STREAM_DATA (lsp->pdu); fill_fixed_hdr (lsp->isis_header, (lsp->level == 1) ? L1_LINK_STATE : L2_LINK_STATE); lsp->lsp_header = (struct isis_link_state_hdr *) (STREAM_DATA (lsp->pdu) + ISIS_FIXED_HDR_LEN); memcpy (lsp->lsp_header, lsp_hdr, ISIS_LSP_HDR_LEN); /* * Retain only LSP header */ lsp->lsp_header->pdu_len = htons (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN); /* * Set the remaining lifetime to 0 */ lsp->lsp_header->rem_lifetime = 0; /* * Put the lsp into LSPdb */ lsp_insert (lsp, area->lspdb[lsp->level - 1]); /* * Send in to whole area */ ISIS_FLAGS_SET_ALL (lsp->SRMflags); return; } #ifdef TOPOLOGY_GENERATE static int top_lsp_refresh (struct thread *thread) { struct isis_lsp *lsp; lsp = THREAD_ARG (thread); assert (lsp); lsp->t_lsp_top_ref = NULL; lsp->lsp_header->rem_lifetime = htons (isis_jitter (MAX_AGE, MAX_AGE_JITTER)); lsp->lsp_header->seq_num = htonl (ntohl (lsp->lsp_header->seq_num) + 1); ISIS_FLAGS_SET_ALL (lsp->SRMflags); if (isis->debugs & DEBUG_UPDATE_PACKETS) { zlog_debug ("ISIS-Upd (): refreshing Topology L1 %s", rawlspid_print (lsp->lsp_header->lsp_id)); } /* time to calculate our checksum */ iso_csum_create (STREAM_DATA (lsp->pdu) + 12, ntohs (lsp->lsp_header->pdu_len) - 12, 12); THREAD_TIMER_ON (master, lsp->t_lsp_top_ref, top_lsp_refresh, lsp, isis_jitter (MAX_LSP_GEN_INTERVAL, MAX_LSP_GEN_JITTER)); return ISIS_OK; } void generate_topology_lsps (struct isis_area *area) { struct listnode *node; int i, max = 0; struct arc *arc; u_char lspid[ISIS_SYS_ID_LEN + 2]; struct isis_lsp *lsp; /* first we find the maximal node */ for (ALL_LIST_ELEMENTS_RO (area->topology, node, arc)) { if (arc->from_node > max) max = arc->from_node; if (arc->to_node > max) max = arc->to_node; } for (i = 1; i < (max + 1); i++) { memcpy (lspid, area->topology_baseis, ISIS_SYS_ID_LEN); LSP_PSEUDO_ID (lspid) = 0x00; LSP_FRAGMENT (lspid) = 0x00; lspid[ISIS_SYS_ID_LEN - 1] = (i & 0xFF); lspid[ISIS_SYS_ID_LEN - 2] = ((i >> 8) & 0xFF); lsp = lsp_new (lspid, isis_jitter (area->max_lsp_lifetime[0], MAX_AGE_JITTER), 1, IS_LEVEL_1, 0, 1); lsp->from_topology = 1; /* creating data based on topology */ build_topology_lsp_data (lsp, area, i); /* time to calculate our checksum */ iso_csum_create (STREAM_DATA (lsp->pdu) + 12, ntohs (lsp->lsp_header->pdu_len) - 12, 12); THREAD_TIMER_ON (master, lsp->t_lsp_top_ref, top_lsp_refresh, lsp, isis_jitter (MAX_LSP_GEN_INTERVAL, MAX_LSP_GEN_JITTER)); ISIS_FLAGS_SET_ALL (lsp->SRMflags); lsp_insert (lsp, area->lspdb[0]); } } void remove_topology_lsps (struct isis_area *area) { struct isis_lsp *lsp; dnode_t *dnode, *dnode_next; dnode = dict_first (area->lspdb[0]); while (dnode != NULL) { dnode_next = dict_next (area->lspdb[0], dnode); lsp = dnode_get (dnode); if (lsp->from_topology) { THREAD_TIMER_OFF (lsp->t_lsp_top_ref); lsp_destroy (lsp); dict_delete (area->lspdb[0], dnode); } dnode = dnode_next; } } void build_topology_lsp_data (struct isis_lsp *lsp, struct isis_area *area, int lsp_top_num) { struct listnode *node, *nnode; struct arc *arc; u_char *tlv_ptr; struct is_neigh *is_neigh; int to_lsp = 0; char buff[200]; /* add our nlpids */ /* the 2 is for the TL plus 1 for the nlpid */ tlv_ptr = lsppdu_realloc (lsp, MTYPE_ISIS_TLV, 3); *tlv_ptr = PROTOCOLS_SUPPORTED; /* Type */ *(tlv_ptr + 1) = 1; /* one protocol */ *(tlv_ptr + 2) = NLPID_IP; lsp->tlv_data.nlpids = (struct nlpids *) (tlv_ptr + 1); /* first, lets add the tops */ /* the 2 is for the TL plus 1 for the virtual field */ tlv_ptr = lsppdu_realloc (lsp, MTYPE_ISIS_TLV, 3); *tlv_ptr = IS_NEIGHBOURS; /* Type */ *(tlv_ptr + 1) = 1; /* this is the virtual char len */ *(tlv_ptr + 2) = 0; /* virtual is zero */ lsp->tlv_data.is_neighs = list_new (); /* new list of is_neighbours */ /* add reachability for this IS for simulated 1 */ if (lsp_top_num == 1) { /* assign space for the is_neigh at the pdu end */ is_neigh = (struct is_neigh *) lsppdu_realloc (lsp, MTYPE_ISIS_TLV, sizeof (struct is_neigh)); /* add this node to our list */ listnode_add (lsp->tlv_data.is_neighs, is_neigh); memcpy (&is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN); LSP_PSEUDO_ID (is_neigh->neigh_id) = 0x00; is_neigh->metrics.metric_default = 0x00; /* no special reason */ is_neigh->metrics.metric_delay = METRICS_UNSUPPORTED; is_neigh->metrics.metric_expense = METRICS_UNSUPPORTED; is_neigh->metrics.metric_error = METRICS_UNSUPPORTED; /* don't forget the length */ *(tlv_ptr + 1) += IS_NEIGHBOURS_LEN; /* the -1 is the virtual */ /* no need to check for fragging here, it is a lonely is_reach */ } /* addding is reachabilities */ for (ALL_LIST_ELEMENTS (area->topology, node, nnode, arc)) { if ((arc->from_node == lsp_top_num) || (arc->to_node == lsp_top_num)) { if (arc->to_node == lsp_top_num) to_lsp = arc->from_node; if (arc->from_node == lsp_top_num) to_lsp = arc->to_node; /* if the length here is about to cross the FF limit, we reTLV */ if (*(tlv_ptr + 1) >= (0xFF - IS_NEIGHBOURS_LEN)) { /* retlv */ /* the 2 is for the TL plus 1 for the virtual field */ tlv_ptr = lsppdu_realloc (lsp, MTYPE_ISIS_TLV, 3); *tlv_ptr = IS_NEIGHBOURS; /* Type */ *(tlv_ptr + 1) = 1; /* this is the virtual char len */ *(tlv_ptr + 2) = 0; /* virtual is zero */ } /* doing this here assures us that we won't add an "empty" tlv */ /* assign space for the is_neigh at the pdu end */ is_neigh = (struct is_neigh *) lsppdu_realloc (lsp, MTYPE_ISIS_TLV, sizeof (struct is_neigh)); /* add this node to our list */ listnode_add (lsp->tlv_data.is_neighs, is_neigh); memcpy (&is_neigh->neigh_id, area->topology_baseis, ISIS_SYS_ID_LEN); LSP_PSEUDO_ID (is_neigh->neigh_id) = 0x00; is_neigh->neigh_id[ISIS_SYS_ID_LEN - 1] = (to_lsp & 0xFF); is_neigh->neigh_id[ISIS_SYS_ID_LEN - 2] = ((to_lsp >> 8) & 0xFF); is_neigh->metrics.metric_default = arc->distance; is_neigh->metrics.metric_delay = METRICS_UNSUPPORTED; is_neigh->metrics.metric_expense = METRICS_UNSUPPORTED; is_neigh->metrics.metric_error = METRICS_UNSUPPORTED; /* don't forget the length */ *(tlv_ptr + 1) += IS_NEIGHBOURS_LEN; /* the -1 is the virtual */ } } /* adding dynamic hostname if needed */ if (area->dynhostname) { memset (buff, 0x00, 200); sprintf (buff, "feedme%d", lsp_top_num); /* the 2 is for the TL */ tlv_ptr = lsppdu_realloc (lsp, MTYPE_ISIS_TLV, 2); *tlv_ptr = DYNAMIC_HOSTNAME; /* Type */ *(tlv_ptr + 1) = strlen (buff); /* Length */ /* the -1 is to fit the length in the struct */ lsp->tlv_data.hostname = (struct hostname *) (lsppdu_realloc (lsp, MTYPE_ISIS_TLV, strlen (buff)) - 1); memcpy (lsp->tlv_data.hostname->name, buff, strlen (buff)); } } #endif /* TOPOLOGY_GENERATE */