int
isis_area_get (const char *area_tag)
{
struct isis_area *area;
area = isis_area_lookup (area_tag);
if (area)
{
return FALSE;
}
area = isis_area_create ();
area->area_tag = strdup (area_tag);
isis_listnode_add (isis->area_list, area);
Log(LOG_DEBUG, "DEBUG ( %s/core/ISIS ): New IS-IS area instance %s\n", config.name, area->area_tag);
return FALSE;
}
int
isis_area_destroy (const char *area_tag)
{
struct isis_area *area;
struct listnode *node, *nnode;
struct isis_circuit *circuit;
area = isis_area_lookup (area_tag);
if (area == NULL)
{
Log(LOG_WARNING, "WARN ( %s/core/ISIS ): Can't find ISIS instance %s\n", config.name, area_tag);
return TRUE;
}
if (area->circuit_list)
{
for (ALL_LIST_ELEMENTS (area->circuit_list, node, nnode, circuit))
{
/* The fact that it's in circuit_list means that it was configured */
isis_csm_state_change (ISIS_DISABLE, circuit, area);
isis_circuit_down (circuit);
isis_circuit_deconfigure (circuit, area);
}
isis_list_delete (area->circuit_list);
}
isis_listnode_delete (isis->area_list, area);
if (area->t_remove_aged)
thread_cancel (area->t_remove_aged);
THREAD_TIMER_OFF (area->spftree[0]->t_spf);
THREAD_TIMER_OFF (area->spftree[1]->t_spf);
free(area);
isis->sysid_set=0;
return FALSE;
}
void isis_srcdst_lookup(struct packet_ptrs *pptrs)
{
struct route_node *result;
struct isis_area *area;
char area_tag[] = "default";
int level;
struct in_addr pref4;
#if defined ENABLE_IPV6
struct in6_addr pref6;
#endif
pptrs->igp_src = NULL;
pptrs->igp_dst = NULL;
pptrs->igp_src_info = NULL;
pptrs->igp_dst_info = NULL;
area = isis_area_lookup(area_tag);
if (area) {
level = MAX(area->is_type, 2);
if (pptrs->l3_proto == ETHERTYPE_IP) {
if (!pptrs->igp_src) {
memcpy(&pref4, &((struct my_iphdr *)pptrs->iph_ptr)->ip_src, sizeof(struct in_addr));
result = route_node_match_ipv4(area->route_table[level-1], &pref4);
if (result) {
pptrs->igp_src = (char *) &result->p;
pptrs->igp_src_info = (char *) result->info;
if (result->p.prefixlen > pptrs->lm_mask_src) {
pptrs->lm_mask_src = result->p.prefixlen;
pptrs->lm_method_src = NF_NET_IGP;
}
}
}
if (!pptrs->igp_dst) {
memcpy(&pref4, &((struct my_iphdr *)pptrs->iph_ptr)->ip_dst, sizeof(struct in_addr));
result = route_node_match_ipv4(area->route_table[level-1], &pref4);
if (result) {
pptrs->igp_dst = (char *) &result->p;
pptrs->igp_dst_info = (char *) result->info;
if (result->p.prefixlen > pptrs->lm_mask_dst) {
pptrs->lm_mask_dst = result->p.prefixlen;
pptrs->lm_method_dst = NF_NET_IGP;
}
}
}
}
#if defined ENABLE_IPV6
else if (area && pptrs->l3_proto == ETHERTYPE_IPV6) {
if (!pptrs->igp_src) {
memcpy(&pref6, &((struct ip6_hdr *)pptrs->iph_ptr)->ip6_src, sizeof(struct in6_addr));
result = route_node_match_ipv6(area->route_table6[level-1], &pref6);
if (result) {
pptrs->igp_src = (char *) &result->p;
pptrs->igp_src_info = (char *) result->info;
if (result->p.prefixlen > pptrs->lm_mask_src) {
pptrs->lm_mask_src = result->p.prefixlen;
pptrs->lm_method_src = NF_NET_IGP;
}
}
}
if (!pptrs->igp_dst) {
memcpy(&pref6, &((struct ip6_hdr *)pptrs->iph_ptr)->ip6_dst, sizeof(struct in6_addr));
result = route_node_match_ipv6(area->route_table6[level-1], &pref6);
if (result) {
pptrs->igp_dst = (char *) &result->p;
pptrs->igp_dst_info = (char *) result->info;
if (result->p.prefixlen > pptrs->lm_mask_dst) {
pptrs->lm_mask_dst = result->p.prefixlen;
pptrs->lm_method_dst = NF_NET_IGP;
}
}
}
}
#endif
}
}
