/* Remove external reachability information from a
* specific area for a specific level.
* Schedule an lsp regenerate if necessary. */
static void
isis_redist_uninstall(struct isis_area *area, int level, struct prefix *p)
{
int family = p->family;
struct route_table *er_table = get_ext_reach(area, family, level);
struct route_node *er_node;
if (!er_table)
{
zlog_warn("%s: External reachability table of area %s"
" is not initialized.", __func__, area->area_tag);
return;
}
er_node = route_node_lookup(er_table, p);
if (!er_node)
return;
else
route_unlock_node(er_node);
if (!er_node->info)
return;
XFREE(MTYPE_ISIS, er_node->info);
route_unlock_node(er_node);
lsp_regenerate_schedule(area, level, 0);
}
/* Install external reachability information into a
* specific area for a specific level.
* Schedule an lsp regenerate if necessary */
static void
isis_redist_install(struct isis_area *area, int level,
struct prefix *p, struct isis_ext_info *info)
{
int family = p->family;
struct route_table *er_table = get_ext_reach(area, family, level);
struct route_node *er_node;
if (!er_table)
{
zlog_warn("%s: External reachability table of area %s"
" is not initialized.", __func__, area->area_tag);
return;
}
er_node = route_node_get(er_table, p);
if (er_node->info)
{
route_unlock_node(er_node);
/* Don't update/reschedule lsp generation if nothing changed. */
if (!memcmp(er_node->info, info, sizeof(*info)))
return;
}
else
{
er_node->info = XMALLOC(MTYPE_ISIS, sizeof(*info));
}
memcpy(er_node->info, info, sizeof(*info));
lsp_regenerate_schedule(area, level, 0);
}
void
isis_circuit_is_type_set (struct isis_circuit *circuit, int newtype)
{
if (circuit->state != C_STATE_UP)
{
circuit->is_type = newtype;
return;
}
if (isis->debugs & DEBUG_EVENTS)
zlog_debug ("ISIS-Evt (%s) circuit type change %s -> %s",
circuit->area->area_tag,
circuit_t2string (circuit->is_type),
circuit_t2string (newtype));
if (circuit->is_type == newtype)
return; /* No change */
if (!(newtype & circuit->area->is_type))
{
zlog_err ("ISIS-Evt (%s) circuit type change - invalid level %s because"
" area is %s", circuit->area->area_tag,
circuit_t2string (newtype),
circuit_t2string (circuit->area->is_type));
return;
}
if (! circuit->is_passive)
{
switch (circuit->is_type)
{
case IS_LEVEL_1:
if (newtype == IS_LEVEL_2)
circuit_resign_level (circuit, 1);
circuit_commence_level (circuit, 2);
break;
case IS_LEVEL_1_AND_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level (circuit, 2);
else
circuit_resign_level (circuit, 1);
break;
case IS_LEVEL_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level (circuit, 2);
circuit_commence_level (circuit, 1);
break;
default:
break;
}
}
circuit->is_type = newtype;
lsp_regenerate_schedule (circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return;
}
void
isis_event_circuit_type_change (struct isis_circuit *circuit, int newtype)
{
Log(LOG_DEBUG, "DEBUG (default/core/ISIS ): ISIS-Evt (%s) circuit type change %s -> %s\n",
circuit->area->area_tag,
circuit_t2string (circuit->circuit_is_type),
circuit_t2string (newtype));
if (circuit->circuit_is_type == newtype)
return; /* No change */
if (!(newtype & circuit->area->is_type))
{
Log(LOG_ERR, "ERROR (default/core/ISIS ): ISIS-Evt (%s) circuit type change - invalid level %s because area is %s\n",
circuit->area->area_tag,
circuit_t2string (newtype),
circuit_t2string (circuit->area->is_type));
return;
}
switch (circuit->circuit_is_type)
{
case IS_LEVEL_1:
if (newtype == IS_LEVEL_2)
circuit_resign_level (circuit, 1);
circuit_commence_level (circuit, 2);
break;
case IS_LEVEL_1_AND_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level (circuit, 2);
else
circuit_resign_level (circuit, 1);
break;
case IS_LEVEL_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level (circuit, 2);
circuit_commence_level (circuit, 1);
break;
default:
break;
}
circuit->circuit_is_type = newtype;
lsp_regenerate_schedule (circuit->area);
return;
}
void
isis_event_system_type_change (struct isis_area *area, int newtype)
{
struct listnode *node;
struct isis_circuit *circuit;
Log(LOG_DEBUG, "DEBUG (default/core/ISIS ): ISIS-Evt (%s) system type change %s -> %s\n", area->area_tag,
circuit_t2string (area->is_type), circuit_t2string (newtype));
if (area->is_type == newtype)
return; /* No change */
switch (area->is_type)
{
case IS_LEVEL_1:
if (area->lspdb[1] == NULL)
area->lspdb[1] = lsp_db_init ();
lsp_l2_generate (area);
break;
case IS_LEVEL_1_AND_2:
if (newtype == IS_LEVEL_1)
{
lsp_db_destroy (area->lspdb[1]);
}
else
{
lsp_db_destroy (area->lspdb[0]);
}
break;
case IS_LEVEL_2:
if (area->lspdb[0] == NULL)
area->lspdb[0] = lsp_db_init ();
lsp_l1_generate (area);
break;
default:
break;
}
area->is_type = newtype;
for (ALL_LIST_ELEMENTS_RO (area->circuit_list, node, circuit))
isis_event_circuit_type_change (circuit, newtype);
spftree_area_init (area);
lsp_regenerate_schedule (area);
return;
}
void
isis_event_circuit_state_change (struct isis_circuit *circuit,
struct isis_area *area, int up)
{
area->circuit_state_changes++;
if (isis->debugs & DEBUG_EVENTS)
zlog_debug ("ISIS-Evt (%s) circuit %s", area->area_tag,
up ? "up" : "down");
/*
* Regenerate LSPs this affects
*/
lsp_regenerate_schedule (area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return;
}
int
isis_event_dis_status_change (struct thread *thread)
{
struct isis_circuit *circuit;
circuit = THREAD_ARG (thread);
/* invalid arguments */
if (!circuit || !circuit->area)
return 0;
if (isis->debugs & DEBUG_EVENTS)
zlog_debug ("ISIS-Evt (%s) DIS status change", circuit->area->area_tag);
/* LSP generation again */
lsp_regenerate_schedule (circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return 0;
}
void
isis_event_circuit_state_change (struct isis_circuit *circuit, int up)
{
struct isis_area *area;
area = circuit->area;
assert (area);
area->circuit_state_changes++;
Log(LOG_DEBUG, "DEBUG (default/core/ISIS ): ISIS-Evt (%s) circuit %s\n", circuit->area->area_tag, up ? "up" : "down");
/*
* Regenerate LSPs this affects
*/
lsp_regenerate_schedule (area);
return;
}
void
isis_event_adjacency_state_change (struct isis_adjacency *adj, int newstate)
{
/* adjacency state change event.
* - the only proto-type was supported */
/* invalid arguments */
if (!adj || !adj->circuit || !adj->circuit->area)
return;
Log(LOG_DEBUG, "DEBUG (default/core/ISIS ): ISIS-Evt (%s) Adjacency State change\n",
adj->circuit->area->area_tag);
/* LSP generation again */
lsp_regenerate_schedule (adj->circuit->area);
return;
}
/* Router-id update message from zebra. */
static int
isis_router_id_update_zebra (int command, struct zclient *zclient,
zebra_size_t length, vrf_id_t vrf_id)
{
struct isis_area *area;
struct listnode *node;
struct prefix router_id;
zebra_router_id_update_read (zclient->ibuf, &router_id);
if (isis->router_id == router_id.u.prefix4.s_addr)
return 0;
isis->router_id = router_id.u.prefix4.s_addr;
for (ALL_LIST_ELEMENTS_RO (isis->area_list, node, area))
if (listcount (area->area_addrs) > 0)
lsp_regenerate_schedule (area, area->is_type, 0);
return 0;
}
void
isis_event_adjacency_state_change (struct isis_adjacency *adj, int newstate)
{
/* adjacency state change event.
* - the only proto-type was supported */
/* invalid arguments */
if (!adj || !adj->circuit || !adj->circuit->area)
return;
if (isis->debugs & DEBUG_EVENTS)
zlog_debug ("ISIS-Evt (%s) Adjacency State change",
adj->circuit->area->area_tag);
/* LSP generation again */
lsp_regenerate_schedule (adj->circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return;
}
static void
isis_redist_unset(struct isis_area *area, int level,
int family, int type)
{
struct isis_redist *redist = get_redist_settings(area, family, type, level);
struct route_table *er_table = get_ext_reach(area, family, level);
struct route_node *rn;
struct isis_ext_info *info;
if (!redist->redist)
return;
redist->redist = 0;
if (!er_table)
{
zlog_warn("%s: External reachability table uninitialized.", __func__);
return;
}
for (rn = route_top(er_table); rn; rn = route_next(rn))
{
if (!rn->info)
continue;
info = rn->info;
if (type == DEFAULT_ROUTE)
{
if (!is_default(&rn->p))
continue;
}
else
{
if (info->origin != type)
continue;
}
XFREE(MTYPE_ISIS, rn->info);
route_unlock_node(rn);
}
lsp_regenerate_schedule(area, level, 0);
isis_redist_update_zebra_subscriptions(area->isis);
}
void
isis_circuit_add_addr (struct isis_circuit *circuit,
struct connected *connected)
{
struct listnode *node;
struct prefix_ipv4 *ipv4;
u_char buf[BUFSIZ];
#ifdef HAVE_IPV6
struct prefix_ipv6 *ipv6;
#endif /* HAVE_IPV6 */
memset (&buf, 0, BUFSIZ);
if (connected->address->family == AF_INET)
{
u_int32_t addr = connected->address->u.prefix4.s_addr;
addr = ntohl (addr);
if (IPV4_NET0(addr) ||
IPV4_NET127(addr) ||
IN_CLASSD(addr) ||
IPV4_LINKLOCAL(addr))
return;
for (ALL_LIST_ELEMENTS_RO (circuit->ip_addrs, node, ipv4))
if (prefix_same ((struct prefix *) ipv4, connected->address))
return;
ipv4 = prefix_ipv4_new ();
ipv4->prefixlen = connected->address->prefixlen;
ipv4->prefix = connected->address->u.prefix4;
listnode_add (circuit->ip_addrs, ipv4);
/* Update MPLS TE Local IP address parameter */
set_circuitparams_local_ipaddr (circuit->mtc, ipv4->prefix);
if (circuit->area)
lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);
#ifdef EXTREME_DEBUG
prefix2str (connected->address, buf, BUFSIZ);
zlog_debug ("Added IP address %s to circuit %d", buf,
circuit->circuit_id);
#endif /* EXTREME_DEBUG */
}
void
isis_mpls_te_update (struct interface *ifp)
{
struct isis_circuit *circuit;
/* Sanity Check */
if (ifp == NULL)
return;
/* Get circuit context from interface */
if ((circuit = circuit_scan_by_ifp(ifp)) == NULL)
return;
/* Update TE TLVs ... */
isis_link_params_update(circuit, ifp);
/* ... and LSP */
if (IS_MPLS_TE(isisMplsTE) && circuit->area)
lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);
return;
}
/* Call when interface TE Link parameters are modified */
void
isis_link_params_update (struct isis_circuit *circuit, struct interface *ifp)
{
int i;
struct prefix_ipv4 *addr;
struct mpls_te_circuit *mtc;
/* Sanity Check */
if ((circuit == NULL) || (ifp == NULL))
return;
zlog_info ("MPLS-TE: Initialize circuit parameters for interface %s", ifp->name);
/* Check if MPLS TE Circuit context has not been already created */
if (circuit->mtc == NULL)
circuit->mtc = mpls_te_circuit_new();
mtc = circuit->mtc;
/* Fulfil MTC TLV from ifp TE Link parameters */
if (HAS_LINK_PARAMS(ifp))
{
mtc->status = enable;
/* STD_TE metrics */
if (IS_PARAM_SET(ifp->link_params, LP_ADM_GRP))
set_circuitparams_admin_grp (mtc, ifp->link_params->admin_grp);
else
SUBTLV_TYPE(mtc->admin_grp) = 0;
/* If not already set, register local IP addr from ip_addr list if it exists */
if (SUBTLV_TYPE(mtc->local_ipaddr) == 0)
{
if (circuit->ip_addrs != NULL && listcount(circuit->ip_addrs) != 0)
{
addr = (struct prefix_ipv4 *)listgetdata ((struct listnode *)listhead (circuit->ip_addrs));
set_circuitparams_local_ipaddr (mtc, addr->prefix);
}
}
/* If not already set, try to determine Remote IP addr if circuit is P2P */
if ((SUBTLV_TYPE(mtc->rmt_ipaddr) == 0) && (circuit->circ_type == CIRCUIT_T_P2P))
{
struct isis_adjacency *adj = circuit->u.p2p.neighbor;
if (adj->ipv4_addrs != NULL && listcount(adj->ipv4_addrs) != 0)
{
struct in_addr *ip_addr;
ip_addr = (struct in_addr *)listgetdata ((struct listnode *)listhead (adj->ipv4_addrs));
set_circuitparams_rmt_ipaddr (mtc, *ip_addr);
}
}
if (IS_PARAM_SET(ifp->link_params, LP_MAX_BW))
set_circuitparams_max_bw (mtc, ifp->link_params->max_bw);
else
SUBTLV_TYPE(mtc->max_bw) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_MAX_RSV_BW))
set_circuitparams_max_rsv_bw (mtc, ifp->link_params->max_rsv_bw);
else
SUBTLV_TYPE(mtc->max_rsv_bw) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_UNRSV_BW))
for (i = 0; i < MAX_CLASS_TYPE; i++)
set_circuitparams_unrsv_bw (mtc, i, ifp->link_params->unrsv_bw[i]);
else
SUBTLV_TYPE(mtc->unrsv_bw) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_TE))
set_circuitparams_te_metric(mtc, ifp->link_params->te_metric);
else
SUBTLV_TYPE(mtc->te_metric) = 0;
/* TE metric Extensions */
if (IS_PARAM_SET(ifp->link_params, LP_DELAY))
set_circuitparams_av_delay(mtc, ifp->link_params->av_delay, 0);
else
SUBTLV_TYPE(mtc->av_delay) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_MM_DELAY))
set_circuitparams_mm_delay(mtc, ifp->link_params->min_delay, ifp->link_params->max_delay, 0);
else
SUBTLV_TYPE(mtc->mm_delay) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_DELAY_VAR))
set_circuitparams_delay_var(mtc, ifp->link_params->delay_var);
else
SUBTLV_TYPE(mtc->delay_var) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_PKT_LOSS))
set_circuitparams_pkt_loss(mtc, ifp->link_params->pkt_loss, 0);
else
SUBTLV_TYPE(mtc->pkt_loss) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_RES_BW))
set_circuitparams_res_bw(mtc, ifp->link_params->res_bw);
else
SUBTLV_TYPE(mtc->res_bw) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_AVA_BW))
set_circuitparams_ava_bw(mtc, ifp->link_params->ava_bw);
else
SUBTLV_TYPE(mtc->ava_bw) = 0;
if (IS_PARAM_SET(ifp->link_params, LP_USE_BW))
set_circuitparams_use_bw(mtc, ifp->link_params->use_bw);
else
SUBTLV_TYPE(mtc->use_bw) = 0;
/* INTER_AS */
if (IS_PARAM_SET(ifp->link_params, LP_RMT_AS))
set_circuitparams_inter_as(mtc, ifp->link_params->rmt_ip, ifp->link_params->rmt_as);
else
/* reset inter-as TE params */
unset_circuitparams_inter_as (mtc);
/* Compute total length of SUB TLVs */
mtc->length = subtlvs_len(mtc);
}
else
mtc->status = disable;
/* Finally Update LSP */
#if 0
if (IS_MPLS_TE(isisMplsTE) && circuit->area)
lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);
#endif
return;
}