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isis_spf.c
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isis_spf.c
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/*
* IS-IS Rout(e)ing protocol - isis_spf.c
* The SPT algorithm
*
* 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 <zebra.h>
#include "thread.h"
#include "linklist.h"
#include "vty.h"
#include "log.h"
#include "command.h"
#include "memory.h"
#include "prefix.h"
#include "hash.h"
#include "if.h"
#include "table.h"
#include "isis_constants.h"
#include "isis_common.h"
#include "isis_flags.h"
#include "dict.h"
#include "isisd.h"
#include "isis_misc.h"
#include "isis_adjacency.h"
#include "isis_circuit.h"
#include "isis_tlv.h"
#include "isis_pdu.h"
#include "isis_lsp.h"
#include "isis_dynhn.h"
#include "isis_spf.h"
#include "isis_route.h"
#include "isis_csm.h"
int isis_run_spf_l1 (struct thread *thread);
int isis_run_spf_l2 (struct thread *thread);
/* 7.2.7 */
static void
remove_excess_adjs (struct list *adjs)
{
struct listnode *node, *excess = NULL;
struct isis_adjacency *adj, *candidate = NULL;
int comp;
for (ALL_LIST_ELEMENTS_RO (adjs, node, adj))
{
if (excess == NULL)
excess = node;
candidate = listgetdata (excess);
if (candidate->sys_type < adj->sys_type)
{
excess = node;
candidate = adj;
continue;
}
if (candidate->sys_type > adj->sys_type)
continue;
comp = memcmp (candidate->sysid, adj->sysid, ISIS_SYS_ID_LEN);
if (comp > 0)
{
excess = node;
candidate = adj;
continue;
}
if (comp < 0)
continue;
if (candidate->circuit->circuit_id > adj->circuit->circuit_id)
{
excess = node;
candidate = adj;
continue;
}
if (candidate->circuit->circuit_id < adj->circuit->circuit_id)
continue;
comp = memcmp (candidate->snpa, adj->snpa, ETH_ALEN);
if (comp > 0)
{
excess = node;
candidate = adj;
continue;
}
}
list_delete_node (adjs, excess);
return;
}
static const char *
vtype2string (enum vertextype vtype)
{
switch (vtype)
{
case VTYPE_PSEUDO_IS:
return "pseudo_IS";
break;
case VTYPE_PSEUDO_TE_IS:
return "pseudo_TE-IS";
break;
case VTYPE_NONPSEUDO_IS:
return "IS";
break;
case VTYPE_NONPSEUDO_TE_IS:
return "TE-IS";
break;
case VTYPE_ES:
return "ES";
break;
case VTYPE_IPREACH_INTERNAL:
return "IP internal";
break;
case VTYPE_IPREACH_EXTERNAL:
return "IP external";
break;
case VTYPE_IPREACH_TE:
return "IP TE";
break;
#ifdef HAVE_IPV6
case VTYPE_IP6REACH_INTERNAL:
return "IP6 internal";
break;
case VTYPE_IP6REACH_EXTERNAL:
return "IP6 external";
break;
#endif /* HAVE_IPV6 */
default:
return "UNKNOWN";
}
return NULL; /* Not reached */
}
static const char *
vid2string (struct isis_vertex *vertex, u_char * buff)
{
switch (vertex->type)
{
case VTYPE_PSEUDO_IS:
case VTYPE_PSEUDO_TE_IS:
return print_sys_hostname (vertex->N.id);
break;
case VTYPE_NONPSEUDO_IS:
case VTYPE_NONPSEUDO_TE_IS:
case VTYPE_ES:
return print_sys_hostname (vertex->N.id);
break;
case VTYPE_IPREACH_INTERNAL:
case VTYPE_IPREACH_EXTERNAL:
case VTYPE_IPREACH_TE:
#ifdef HAVE_IPV6
case VTYPE_IP6REACH_INTERNAL:
case VTYPE_IP6REACH_EXTERNAL:
#endif /* HAVE_IPV6 */
prefix2str ((struct prefix *) &vertex->N.prefix, (char *) buff, BUFSIZ);
break;
default:
return "UNKNOWN";
}
return (char *) buff;
}
static struct isis_vertex *
isis_vertex_new (void *id, enum vertextype vtype)
{
struct isis_vertex *vertex;
vertex = XCALLOC (MTYPE_ISIS_VERTEX, sizeof (struct isis_vertex));
if (vertex == NULL)
{
zlog_err ("isis_vertex_new Out of memory!");
return NULL;
}
vertex->type = vtype;
switch (vtype)
{
case VTYPE_ES:
case VTYPE_NONPSEUDO_IS:
case VTYPE_NONPSEUDO_TE_IS:
memcpy (vertex->N.id, (u_char *) id, ISIS_SYS_ID_LEN);
break;
case VTYPE_PSEUDO_IS:
case VTYPE_PSEUDO_TE_IS:
memcpy (vertex->N.id, (u_char *) id, ISIS_SYS_ID_LEN + 1);
break;
case VTYPE_IPREACH_INTERNAL:
case VTYPE_IPREACH_EXTERNAL:
case VTYPE_IPREACH_TE:
#ifdef HAVE_IPV6
case VTYPE_IP6REACH_INTERNAL:
case VTYPE_IP6REACH_EXTERNAL:
#endif /* HAVE_IPV6 */
memcpy (&vertex->N.prefix, (struct prefix *) id,
sizeof (struct prefix));
break;
default:
zlog_err ("WTF!");
}
vertex->Adj_N = list_new ();
vertex->parents = list_new ();
vertex->children = list_new ();
return vertex;
}
static void
isis_vertex_del (struct isis_vertex *vertex)
{
list_delete (vertex->Adj_N);
vertex->Adj_N = NULL;
list_delete (vertex->parents);
vertex->parents = NULL;
list_delete (vertex->children);
vertex->children = NULL;
memset(vertex, 0, sizeof(struct isis_vertex));
XFREE (MTYPE_ISIS_VERTEX, vertex);
return;
}
static void
isis_vertex_adj_del (struct isis_vertex *vertex, struct isis_adjacency *adj)
{
struct listnode *node, *nextnode;
if (!vertex)
return;
for (node = listhead (vertex->Adj_N); node; node = nextnode)
{
nextnode = listnextnode(node);
if (listgetdata(node) == adj)
list_delete_node(vertex->Adj_N, node);
}
return;
}
struct isis_spftree *
isis_spftree_new (struct isis_area *area)
{
struct isis_spftree *tree;
tree = XCALLOC (MTYPE_ISIS_SPFTREE, sizeof (struct isis_spftree));
if (tree == NULL)
{
zlog_err ("ISIS-Spf: isis_spftree_new Out of memory!");
return NULL;
}
tree->tents = list_new ();
tree->paths = list_new ();
tree->area = area;
tree->last_run_timestamp = 0;
tree->last_run_duration = 0;
tree->runcount = 0;
tree->pending = 0;
return tree;
}
void
isis_spftree_del (struct isis_spftree *spftree)
{
THREAD_TIMER_OFF (spftree->t_spf);
spftree->tents->del = (void (*)(void *)) isis_vertex_del;
list_delete (spftree->tents);
spftree->tents = NULL;
spftree->paths->del = (void (*)(void *)) isis_vertex_del;
list_delete (spftree->paths);
spftree->paths = NULL;
XFREE (MTYPE_ISIS_SPFTREE, spftree);
return;
}
void
isis_spftree_adj_del (struct isis_spftree *spftree, struct isis_adjacency *adj)
{
struct listnode *node;
if (!adj)
return;
for (node = listhead (spftree->tents); node; node = listnextnode (node))
isis_vertex_adj_del (listgetdata (node), adj);
for (node = listhead (spftree->paths); node; node = listnextnode (node))
isis_vertex_adj_del (listgetdata (node), adj);
return;
}
void
spftree_area_init (struct isis_area *area)
{
if (area->is_type & IS_LEVEL_1)
{
if (area->spftree[0] == NULL)
area->spftree[0] = isis_spftree_new (area);
#ifdef HAVE_IPV6
if (area->spftree6[0] == NULL)
area->spftree6[0] = isis_spftree_new (area);
#endif
}
if (area->is_type & IS_LEVEL_2)
{
if (area->spftree[1] == NULL)
area->spftree[1] = isis_spftree_new (area);
#ifdef HAVE_IPV6
if (area->spftree6[1] == NULL)
area->spftree6[1] = isis_spftree_new (area);
#endif
}
return;
}
void
spftree_area_del (struct isis_area *area)
{
if (area->is_type & IS_LEVEL_1)
{
if (area->spftree[0] != NULL)
{
isis_spftree_del (area->spftree[0]);
area->spftree[0] = NULL;
}
#ifdef HAVE_IPV6
if (area->spftree6[0])
{
isis_spftree_del (area->spftree6[0]);
area->spftree6[0] = NULL;
}
#endif
}
if (area->is_type & IS_LEVEL_2)
{
if (area->spftree[1] != NULL)
{
isis_spftree_del (area->spftree[1]);
area->spftree[1] = NULL;
}
#ifdef HAVE_IPV6
if (area->spftree6[1] != NULL)
{
isis_spftree_del (area->spftree6[1]);
area->spftree6[1] = NULL;
}
#endif
}
return;
}
void
spftree_area_adj_del (struct isis_area *area, struct isis_adjacency *adj)
{
if (area->is_type & IS_LEVEL_1)
{
if (area->spftree[0] != NULL)
isis_spftree_adj_del (area->spftree[0], adj);
#ifdef HAVE_IPV6
if (area->spftree6[0] != NULL)
isis_spftree_adj_del (area->spftree6[0], adj);
#endif
}
if (area->is_type & IS_LEVEL_2)
{
if (area->spftree[1] != NULL)
isis_spftree_adj_del (area->spftree[1], adj);
#ifdef HAVE_IPV6
if (area->spftree6[1] != NULL)
isis_spftree_adj_del (area->spftree6[1], adj);
#endif
}
return;
}
/*
* Find the system LSP: returns the LSP in our LSP database
* associated with the given system ID.
*/
static struct isis_lsp *
isis_root_system_lsp (struct isis_area *area, int level, u_char *sysid)
{
struct isis_lsp *lsp;
u_char lspid[ISIS_SYS_ID_LEN + 2];
memcpy (lspid, sysid, ISIS_SYS_ID_LEN);
LSP_PSEUDO_ID (lspid) = 0;
LSP_FRAGMENT (lspid) = 0;
lsp = lsp_search (lspid, area->lspdb[level - 1]);
if (lsp && lsp->lsp_header->rem_lifetime != 0)
return lsp;
return NULL;
}
/*
* Add this IS to the root of SPT
*/
static struct isis_vertex *
isis_spf_add_root (struct isis_spftree *spftree, int level, u_char *sysid)
{
struct isis_vertex *vertex;
struct isis_lsp *lsp;
#ifdef EXTREME_DEBUG
u_char buff[BUFSIZ];
#endif /* EXTREME_DEBUG */
lsp = isis_root_system_lsp (spftree->area, level, sysid);
if (lsp == NULL)
zlog_warn ("ISIS-Spf: could not find own l%d LSP!", level);
if (!spftree->area->oldmetric)
vertex = isis_vertex_new (sysid, VTYPE_NONPSEUDO_TE_IS);
else
vertex = isis_vertex_new (sysid, VTYPE_NONPSEUDO_IS);
listnode_add (spftree->paths, vertex);
#ifdef EXTREME_DEBUG
zlog_debug ("ISIS-Spf: added this IS %s %s depth %d dist %d to PATHS",
vtype2string (vertex->type), vid2string (vertex, buff),
vertex->depth, vertex->d_N);
#endif /* EXTREME_DEBUG */
return vertex;
}
static struct isis_vertex *
isis_find_vertex (struct list *list, void *id, enum vertextype vtype)
{
struct listnode *node;
struct isis_vertex *vertex;
struct prefix *p1, *p2;
for (ALL_LIST_ELEMENTS_RO (list, node, vertex))
{
if (vertex->type != vtype)
continue;
switch (vtype)
{
case VTYPE_ES:
case VTYPE_NONPSEUDO_IS:
case VTYPE_NONPSEUDO_TE_IS:
if (memcmp ((u_char *) id, vertex->N.id, ISIS_SYS_ID_LEN) == 0)
return vertex;
break;
case VTYPE_PSEUDO_IS:
case VTYPE_PSEUDO_TE_IS:
if (memcmp ((u_char *) id, vertex->N.id, ISIS_SYS_ID_LEN + 1) == 0)
return vertex;
break;
case VTYPE_IPREACH_INTERNAL:
case VTYPE_IPREACH_EXTERNAL:
case VTYPE_IPREACH_TE:
#ifdef HAVE_IPV6
case VTYPE_IP6REACH_INTERNAL:
case VTYPE_IP6REACH_EXTERNAL:
#endif /* HAVE_IPV6 */
p1 = (struct prefix *) id;
p2 = (struct prefix *) &vertex->N.id;
if (p1->family == p2->family && p1->prefixlen == p2->prefixlen &&
memcmp (&p1->u.prefix, &p2->u.prefix,
PSIZE (p1->prefixlen)) == 0)
return vertex;
break;
}
}
return NULL;
}
/*
* Add a vertex to TENT sorted by cost and by vertextype on tie break situation
*/
static struct isis_vertex *
isis_spf_add2tent (struct isis_spftree *spftree, enum vertextype vtype,
void *id, uint32_t cost, int depth, int family,
struct isis_adjacency *adj, struct isis_vertex *parent)
{
struct isis_vertex *vertex, *v;
struct listnode *node;
struct isis_adjacency *parent_adj;
#ifdef EXTREME_DEBUG
u_char buff[BUFSIZ];
#endif
assert (isis_find_vertex (spftree->paths, id, vtype) == NULL);
assert (isis_find_vertex (spftree->tents, id, vtype) == NULL);
vertex = isis_vertex_new (id, vtype);
vertex->d_N = cost;
vertex->depth = depth;
if (parent) {
listnode_add (vertex->parents, parent);
if (listnode_lookup (parent->children, vertex) == NULL)
listnode_add (parent->children, vertex);
}
if (parent && parent->Adj_N && listcount(parent->Adj_N) > 0) {
for (ALL_LIST_ELEMENTS_RO (parent->Adj_N, node, parent_adj))
listnode_add (vertex->Adj_N, parent_adj);
} else if (adj) {
listnode_add (vertex->Adj_N, adj);
}
#ifdef EXTREME_DEBUG
zlog_debug ("ISIS-Spf: add to TENT %s %s %s depth %d dist %d adjcount %d",
print_sys_hostname (vertex->N.id),
vtype2string (vertex->type), vid2string (vertex, buff),
vertex->depth, vertex->d_N, listcount(vertex->Adj_N));
#endif /* EXTREME_DEBUG */
if (list_isempty (spftree->tents))
{
listnode_add (spftree->tents, vertex);
return vertex;
}
/* XXX: This cant use the standard ALL_LIST_ELEMENTS macro */
for (node = listhead (spftree->tents); node; node = listnextnode (node))
{
v = listgetdata (node);
if (v->d_N > vertex->d_N)
{
list_add_node_prev (spftree->tents, node, vertex);
break;
}
else if (v->d_N == vertex->d_N && v->type > vertex->type)
{
/* Tie break, add according to type */
list_add_node_prev (spftree->tents, node, vertex);
break;
}
}
if (node == NULL)
listnode_add (spftree->tents, vertex);
return vertex;
}
static void
isis_spf_add_local (struct isis_spftree *spftree, enum vertextype vtype,
void *id, struct isis_adjacency *adj, uint32_t cost,
int family, struct isis_vertex *parent)
{
struct isis_vertex *vertex;
vertex = isis_find_vertex (spftree->tents, id, vtype);
if (vertex)
{
/* C.2.5 c) */
if (vertex->d_N == cost)
{
if (adj)
listnode_add (vertex->Adj_N, adj);
/* d) */
if (listcount (vertex->Adj_N) > ISIS_MAX_PATH_SPLITS)
remove_excess_adjs (vertex->Adj_N);
if (parent && (listnode_lookup (vertex->parents, parent) == NULL))
listnode_add (vertex->parents, parent);
if (parent && (listnode_lookup (parent->children, vertex) == NULL))
listnode_add (parent->children, vertex);
return;
}
else if (vertex->d_N < cost)
{
/* e) do nothing */
return;
}
else { /* vertex->d_N > cost */
/* f) */
struct listnode *pnode, *pnextnode;
struct isis_vertex *pvertex;
listnode_delete (spftree->tents, vertex);
assert (listcount (vertex->children) == 0);
for (ALL_LIST_ELEMENTS (vertex->parents, pnode, pnextnode, pvertex))
listnode_delete(pvertex->children, vertex);
isis_vertex_del (vertex);
}
}
isis_spf_add2tent (spftree, vtype, id, cost, 1, family, adj, parent);
return;
}
static void
process_N (struct isis_spftree *spftree, enum vertextype vtype, void *id,
uint32_t dist, uint16_t depth, int family,
struct isis_vertex *parent)
{
struct isis_vertex *vertex;
#ifdef EXTREME_DEBUG
u_char buff[255];
#endif
assert (spftree && parent);
/* RFC3787 section 5.1 */
if (spftree->area->newmetric == 1)
{
if (dist > MAX_WIDE_PATH_METRIC)
return;
}
/* C.2.6 b) */
else if (spftree->area->oldmetric == 1)
{
if (dist > MAX_NARROW_PATH_METRIC)
return;
}
/* c) */
vertex = isis_find_vertex (spftree->paths, id, vtype);
if (vertex)
{
#ifdef EXTREME_DEBUG
zlog_debug ("ISIS-Spf: process_N %s %s %s dist %d already found from PATH",
print_sys_hostname (vertex->N.id),
vtype2string (vtype), vid2string (vertex, buff), dist);
#endif /* EXTREME_DEBUG */
assert (dist >= vertex->d_N);
return;
}
vertex = isis_find_vertex (spftree->tents, id, vtype);
/* d) */
if (vertex)
{
/* 1) */
#ifdef EXTREME_DEBUG
zlog_debug ("ISIS-Spf: process_N %s %s %s dist %d parent %s adjcount %d",
print_sys_hostname (vertex->N.id),
vtype2string (vtype), vid2string (vertex, buff), dist,
(parent ? print_sys_hostname (parent->N.id) : "null"),
(parent ? listcount (parent->Adj_N) : 0));
#endif /* EXTREME_DEBUG */
if (vertex->d_N == dist)
{
struct listnode *node;
struct isis_adjacency *parent_adj;
for (ALL_LIST_ELEMENTS_RO (parent->Adj_N, node, parent_adj))
if (listnode_lookup(vertex->Adj_N, parent_adj) == NULL)
listnode_add (vertex->Adj_N, parent_adj);
/* 2) */
if (listcount (vertex->Adj_N) > ISIS_MAX_PATH_SPLITS)
remove_excess_adjs (vertex->Adj_N);
if (listnode_lookup (vertex->parents, parent) == NULL)
listnode_add (vertex->parents, parent);
if (listnode_lookup (parent->children, vertex) == NULL)
listnode_add (parent->children, vertex);
/* 3) */
return;
}
else if (vertex->d_N < dist)
{
return;
/* 4) */
}
else
{
struct listnode *pnode, *pnextnode;
struct isis_vertex *pvertex;
listnode_delete (spftree->tents, vertex);
assert (listcount (vertex->children) == 0);
for (ALL_LIST_ELEMENTS (vertex->parents, pnode, pnextnode, pvertex))
listnode_delete(pvertex->children, vertex);
isis_vertex_del (vertex);
}
}
#ifdef EXTREME_DEBUG
zlog_debug ("ISIS-Spf: process_N add2tent %s %s dist %d parent %s",
print_sys_hostname(id), vtype2string (vtype), dist,
(parent ? print_sys_hostname (parent->N.id) : "null"));
#endif /* EXTREME_DEBUG */
isis_spf_add2tent (spftree, vtype, id, dist, depth, family, NULL, parent);
return;
}
/*
* C.2.6 Step 1
*/
static int
isis_spf_process_lsp (struct isis_spftree *spftree, struct isis_lsp *lsp,
uint32_t cost, uint16_t depth, int family,
u_char *root_sysid, struct isis_vertex *parent)
{
struct listnode *node, *fragnode = NULL;
uint32_t dist;
struct is_neigh *is_neigh;
struct te_is_neigh *te_is_neigh;
struct ipv4_reachability *ipreach;
struct te_ipv4_reachability *te_ipv4_reach;
enum vertextype vtype;
struct prefix prefix;
#ifdef HAVE_IPV6
struct ipv6_reachability *ip6reach;
#endif /* HAVE_IPV6 */
static const u_char null_sysid[ISIS_SYS_ID_LEN];
if (!speaks (lsp->tlv_data.nlpids, family))
return ISIS_OK;
lspfragloop:
if (lsp->lsp_header->seq_num == 0)
{
zlog_warn ("isis_spf_process_lsp(): lsp with 0 seq_num - ignore");
return ISIS_WARNING;
}
#ifdef EXTREME_DEBUG
zlog_debug ("ISIS-Spf: process_lsp %s", print_sys_hostname(lsp->lsp_header->lsp_id));
#endif /* EXTREME_DEBUG */
if (!ISIS_MASK_LSP_OL_BIT (lsp->lsp_header->lsp_bits))
{
if (lsp->tlv_data.is_neighs)
{
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.is_neighs, node, is_neigh))
{
/* C.2.6 a) */
/* Two way connectivity */
if (!memcmp (is_neigh->neigh_id, root_sysid, ISIS_SYS_ID_LEN))
continue;
if (!memcmp (is_neigh->neigh_id, null_sysid, ISIS_SYS_ID_LEN))
continue;
dist = cost + is_neigh->metrics.metric_default;
vtype = LSP_PSEUDO_ID (is_neigh->neigh_id) ? VTYPE_PSEUDO_IS
: VTYPE_NONPSEUDO_IS;
process_N (spftree, vtype, (void *) is_neigh->neigh_id, dist,
depth + 1, family, parent);
}
}
if (lsp->tlv_data.te_is_neighs)
{
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_is_neighs, node,
te_is_neigh))
{
if (!memcmp (te_is_neigh->neigh_id, root_sysid, ISIS_SYS_ID_LEN))
continue;
if (!memcmp (te_is_neigh->neigh_id, null_sysid, ISIS_SYS_ID_LEN))
continue;
dist = cost + GET_TE_METRIC(te_is_neigh);
vtype = LSP_PSEUDO_ID (te_is_neigh->neigh_id) ? VTYPE_PSEUDO_TE_IS
: VTYPE_NONPSEUDO_TE_IS;
process_N (spftree, vtype, (void *) te_is_neigh->neigh_id, dist,
depth + 1, family, parent);
}
}
}
if (family == AF_INET && lsp->tlv_data.ipv4_int_reachs)
{
prefix.family = AF_INET;
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv4_int_reachs, node, ipreach))
{
dist = cost + ipreach->metrics.metric_default;
vtype = VTYPE_IPREACH_INTERNAL;
prefix.u.prefix4 = ipreach->prefix;
prefix.prefixlen = ip_masklen (ipreach->mask);
apply_mask (&prefix);
process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
family, parent);
}
}
if (family == AF_INET && lsp->tlv_data.ipv4_ext_reachs)
{
prefix.family = AF_INET;
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv4_ext_reachs, node, ipreach))
{
dist = cost + ipreach->metrics.metric_default;
vtype = VTYPE_IPREACH_EXTERNAL;
prefix.u.prefix4 = ipreach->prefix;
prefix.prefixlen = ip_masklen (ipreach->mask);
apply_mask (&prefix);
process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
family, parent);
}
}
if (family == AF_INET && lsp->tlv_data.te_ipv4_reachs)
{
prefix.family = AF_INET;
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_ipv4_reachs,
node, te_ipv4_reach))
{
assert ((te_ipv4_reach->control & 0x3F) <= IPV4_MAX_BITLEN);
dist = cost + ntohl (te_ipv4_reach->te_metric);
vtype = VTYPE_IPREACH_TE;
prefix.u.prefix4 = newprefix2inaddr (&te_ipv4_reach->prefix_start,
te_ipv4_reach->control);
prefix.prefixlen = (te_ipv4_reach->control & 0x3F);
apply_mask (&prefix);
process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
family, parent);
}
}
#ifdef HAVE_IPV6
if (family == AF_INET6 && lsp->tlv_data.ipv6_reachs)
{
prefix.family = AF_INET6;
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv6_reachs, node, ip6reach))
{
assert (ip6reach->prefix_len <= IPV6_MAX_BITLEN);
dist = cost + ntohl(ip6reach->metric);
vtype = (ip6reach->control_info & CTRL_INFO_DISTRIBUTION) ?
VTYPE_IP6REACH_EXTERNAL : VTYPE_IP6REACH_INTERNAL;
prefix.prefixlen = ip6reach->prefix_len;
memcpy (&prefix.u.prefix6.s6_addr, ip6reach->prefix,
PSIZE (ip6reach->prefix_len));
apply_mask (&prefix);
process_N (spftree, vtype, (void *) &prefix, dist, depth + 1,
family, parent);
}
}
#endif /* HAVE_IPV6 */
if (fragnode == NULL)
fragnode = listhead (lsp->lspu.frags);
else
fragnode = listnextnode (fragnode);
if (fragnode)
{
lsp = listgetdata (fragnode);
goto lspfragloop;
}
return ISIS_OK;
}
static int
isis_spf_process_pseudo_lsp (struct isis_spftree *spftree,
struct isis_lsp *lsp, uint32_t cost,
uint16_t depth, int family,
u_char *root_sysid,
struct isis_vertex *parent)
{
struct listnode *node, *fragnode = NULL;
struct is_neigh *is_neigh;
struct te_is_neigh *te_is_neigh;
enum vertextype vtype;
uint32_t dist;
pseudofragloop:
if (lsp->lsp_header->seq_num == 0)
{
zlog_warn ("isis_spf_process_pseudo_lsp(): lsp with 0 seq_num"
" - do not process");
return ISIS_WARNING;
}
#ifdef EXTREME_DEBUG
zlog_debug ("ISIS-Spf: process_pseudo_lsp %s",
print_sys_hostname(lsp->lsp_header->lsp_id));
#endif /* EXTREME_DEBUG */
/* RFC3787 section 4 SHOULD ignore overload bit in pseudo LSPs */
if (lsp->tlv_data.is_neighs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.is_neighs, node, is_neigh))
{
/* Two way connectivity */
if (!memcmp (is_neigh->neigh_id, root_sysid, ISIS_SYS_ID_LEN))
continue;
dist = cost + is_neigh->metrics.metric_default;
vtype = LSP_PSEUDO_ID (is_neigh->neigh_id) ? VTYPE_PSEUDO_IS
: VTYPE_NONPSEUDO_IS;
process_N (spftree, vtype, (void *) is_neigh->neigh_id, dist,
depth + 1, family, parent);
}
if (lsp->tlv_data.te_is_neighs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_is_neighs, node, te_is_neigh))
{
/* Two way connectivity */
if (!memcmp (te_is_neigh->neigh_id, root_sysid, ISIS_SYS_ID_LEN))
continue;
dist = cost + GET_TE_METRIC(te_is_neigh);
vtype = LSP_PSEUDO_ID (te_is_neigh->neigh_id) ? VTYPE_PSEUDO_TE_IS
: VTYPE_NONPSEUDO_TE_IS;
process_N (spftree, vtype, (void *) te_is_neigh->neigh_id, dist,
depth + 1, family, parent);
}
if (fragnode == NULL)
fragnode = listhead (lsp->lspu.frags);
else
fragnode = listnextnode (fragnode);
if (fragnode)
{
lsp = listgetdata (fragnode);
goto pseudofragloop;
}
return ISIS_OK;
}
static int
isis_spf_preload_tent (struct isis_spftree *spftree, int level,
int family, u_char *root_sysid,
struct isis_vertex *parent)
{
struct isis_circuit *circuit;
struct listnode *cnode, *anode, *ipnode;
struct isis_adjacency *adj;
struct isis_lsp *lsp;
struct list *adj_list;
struct list *adjdb;
struct prefix_ipv4 *ipv4;
struct prefix prefix;
int retval = ISIS_OK;
u_char lsp_id[ISIS_SYS_ID_LEN + 2];
static u_char null_lsp_id[ISIS_SYS_ID_LEN + 2];
#ifdef HAVE_IPV6
struct prefix_ipv6 *ipv6;
#endif /* HAVE_IPV6 */
for (ALL_LIST_ELEMENTS_RO (spftree->area->circuit_list, cnode, circuit))
{
if (circuit->state != C_STATE_UP)
continue;
if (!(circuit->is_type & level))
continue;
if (family == AF_INET && !circuit->ip_router)
continue;
#ifdef HAVE_IPV6
if (family == AF_INET6 && !circuit->ipv6_router)
continue;
#endif /* HAVE_IPV6 */
/*
* Add IP(v6) addresses of this circuit
*/
if (family == AF_INET)
{
prefix.family = AF_INET;
for (ALL_LIST_ELEMENTS_RO (circuit->ip_addrs, ipnode, ipv4))
{
prefix.u.prefix4 = ipv4->prefix;
prefix.prefixlen = ipv4->prefixlen;
apply_mask (&prefix);
isis_spf_add_local (spftree, VTYPE_IPREACH_INTERNAL, &prefix,
NULL, 0, family, parent);
}
}
#ifdef HAVE_IPV6
if (family == AF_INET6)
{
prefix.family = AF_INET6;
for (ALL_LIST_ELEMENTS_RO (circuit->ipv6_non_link, ipnode, ipv6))
{
prefix.prefixlen = ipv6->prefixlen;
prefix.u.prefix6 = ipv6->prefix;
apply_mask (&prefix);
isis_spf_add_local (spftree, VTYPE_IP6REACH_INTERNAL,
&prefix, NULL, 0, family, parent);
}
}
#endif /* HAVE_IPV6 */
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
{
/*
* Add the adjacencies
*/
adj_list = list_new ();
adjdb = circuit->u.bc.adjdb[level - 1];
isis_adj_build_up_list (adjdb, adj_list);
if (listcount (adj_list) == 0)