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/*
* IS-IS Rout(e)ing protocol - isis_circuit.h
*
* 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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#ifdef GNU_LINUX
#include <net/ethernet.h>
#else
#include <netinet/if_ether.h>
#endif
#include "log.h"
#include "memory.h"
#include "vrf.h"
#include "if.h"
#include "linklist.h"
#include "command.h"
#include "thread.h"
#include "vty.h"
#include "hash.h"
#include "prefix.h"
#include "stream.h"
#include "qobj.h"
#include "lib/northbound_cli.h"
#include "isisd/dict.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_network.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_dr.h"
#include "isisd/isisd.h"
#include "isisd/isis_csm.h"
#include "isisd/isis_events.h"
#include "isisd/isis_te.h"
#include "isisd/isis_mt.h"
#include "isisd/isis_errors.h"
#include "isisd/isis_tx_queue.h"
DEFINE_QOBJ_TYPE(isis_circuit)
/*
* Prototypes.
*/
int isis_interface_config_write(struct vty *);
int isis_if_new_hook(struct interface *);
int isis_if_delete_hook(struct interface *);
struct isis_circuit *isis_circuit_new(void)
{
struct isis_circuit *circuit;
int i;
circuit = XCALLOC(MTYPE_ISIS_CIRCUIT, sizeof(struct isis_circuit));
/*
* Default values
*/
#ifndef FABRICD
circuit->is_type = yang_get_default_enum(
"/frr-interface:lib/interface/frr-isisd:isis/circuit-type");
circuit->flags = 0;
circuit->pad_hellos = yang_get_default_bool(
"/frr-interface:lib/interface/frr-isisd:isis/hello/padding");
circuit->hello_interval[0] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/hello/interval/level-1");
circuit->hello_interval[1] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/hello/interval/level-2");
circuit->hello_multiplier[0] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/hello/multiplier/level-1");
circuit->hello_multiplier[1] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/hello/multiplier/level-2");
circuit->csnp_interval[0] = yang_get_default_uint16(
"/frr-interface:lib/interface/frr-isisd:isis/csnp-interval/level-1");
circuit->csnp_interval[1] = yang_get_default_uint16(
"/frr-interface:lib/interface/frr-isisd:isis/csnp-interval/level-2");
circuit->psnp_interval[0] = yang_get_default_uint16(
"/frr-interface:lib/interface/frr-isisd:isis/psnp-interval/level-1");
circuit->psnp_interval[1] = yang_get_default_uint16(
"/frr-interface:lib/interface/frr-isisd:isis/psnp-interval/level-2");
circuit->priority[0] = yang_get_default_uint8(
"/frr-interface:lib/interface/frr-isisd:isis/priority/level-1");
circuit->priority[1] = yang_get_default_uint8(
"/frr-interface:lib/interface/frr-isisd:isis/priority/level-2");
circuit->metric[0] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/metric/level-1");
circuit->metric[1] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/metric/level-2");
circuit->te_metric[0] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/metric/level-1");
circuit->te_metric[1] = yang_get_default_uint32(
"/frr-interface:lib/interface/frr-isisd:isis/metric/level-2");
for (i = 0; i < 2; i++) {
circuit->level_arg[i].level = i + 1;
circuit->level_arg[i].circuit = circuit;
}
#else
circuit->is_type = IS_LEVEL_1_AND_2;
circuit->flags = 0;
circuit->pad_hellos = 1;
for (i = 0; i < 2; i++) {
circuit->hello_interval[i] = DEFAULT_HELLO_INTERVAL;
circuit->hello_multiplier[i] = DEFAULT_HELLO_MULTIPLIER;
circuit->csnp_interval[i] = DEFAULT_CSNP_INTERVAL;
circuit->psnp_interval[i] = DEFAULT_PSNP_INTERVAL;
circuit->priority[i] = DEFAULT_PRIORITY;
circuit->metric[i] = DEFAULT_CIRCUIT_METRIC;
circuit->te_metric[i] = DEFAULT_CIRCUIT_METRIC;
circuit->level_arg[i].level = i + 1;
circuit->level_arg[i].circuit = circuit;
}
#endif /* ifndef FABRICD */
circuit->mtc = mpls_te_circuit_new();
circuit_mt_init(circuit);
QOBJ_REG(circuit, isis_circuit);
return circuit;
}
void isis_circuit_del(struct isis_circuit *circuit)
{
if (!circuit)
return;
QOBJ_UNREG(circuit);
isis_circuit_if_unbind(circuit, circuit->interface);
circuit_mt_finish(circuit);
/* and lastly the circuit itself */
XFREE(MTYPE_ISIS_CIRCUIT, circuit);
return;
}
void isis_circuit_configure(struct isis_circuit *circuit,
struct isis_area *area)
{
assert(area);
circuit->area = area;
/*
* Whenever the is-type of an area is changed, the is-type of each
* circuit
* in that area is updated to a non-empty subset of the area is-type.
* Inversely, when configuring a new circuit, this property should be
* ensured as well.
*/
if (area->is_type != IS_LEVEL_1_AND_2)
circuit->is_type = area->is_type;
/*
* Add the circuit into area
*/
listnode_add(area->circuit_list, circuit);
circuit->idx = flags_get_index(&area->flags);
return;
}
void isis_circuit_deconfigure(struct isis_circuit *circuit,
struct isis_area *area)
{
/* Free the index of SRM and SSN flags */
flags_free_index(&area->flags, circuit->idx);
circuit->idx = 0;
/* Remove circuit from area */
assert(circuit->area == area);
listnode_delete(area->circuit_list, circuit);
circuit->area = NULL;
return;
}
struct isis_circuit *circuit_lookup_by_ifp(struct interface *ifp,
struct list *list)
{
struct isis_circuit *circuit = NULL;
struct listnode *node;
if (!list)
return NULL;
for (ALL_LIST_ELEMENTS_RO(list, node, circuit))
if (circuit->interface == ifp) {
assert(ifp->info == circuit);
return circuit;
}
return NULL;
}
struct isis_circuit *circuit_scan_by_ifp(struct interface *ifp)
{
struct isis_area *area;
struct listnode *node;
struct isis_circuit *circuit;
if (ifp->info)
return (struct isis_circuit *)ifp->info;
if (isis->area_list) {
for (ALL_LIST_ELEMENTS_RO(isis->area_list, node, area)) {
circuit =
circuit_lookup_by_ifp(ifp, area->circuit_list);
if (circuit)
return circuit;
}
}
return circuit_lookup_by_ifp(ifp, isis->init_circ_list);
}
void isis_circuit_add_addr(struct isis_circuit *circuit,
struct connected *connected)
{
struct listnode *node;
struct prefix_ipv4 *ipv4;
#if defined(EXTREME_DEBUG)
char buf[PREFIX2STR_BUFFER];
#endif
struct prefix_ipv6 *ipv6;
if (connected->address->family == AF_INET) {
uint32_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, sizeof(buf));
zlog_debug("Added IP address %s to circuit %s", buf,
circuit->interface->name);
#endif /* EXTREME_DEBUG */
}
if (connected->address->family == AF_INET6) {
if (IN6_IS_ADDR_LOOPBACK(&connected->address->u.prefix6))
return;
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_link, node, ipv6))
if (prefix_same((struct prefix *)ipv6,
connected->address))
return;
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, node, ipv6))
if (prefix_same((struct prefix *)ipv6,
connected->address))
return;
ipv6 = prefix_ipv6_new();
ipv6->prefixlen = connected->address->prefixlen;
ipv6->prefix = connected->address->u.prefix6;
if (IN6_IS_ADDR_LINKLOCAL(&ipv6->prefix))
listnode_add(circuit->ipv6_link, ipv6);
else
listnode_add(circuit->ipv6_non_link, ipv6);
if (circuit->area)
lsp_regenerate_schedule(circuit->area, circuit->is_type,
0);
#ifdef EXTREME_DEBUG
prefix2str(connected->address, buf, sizeof(buf));
zlog_debug("Added IPv6 address %s to circuit %s", buf,
circuit->interface->name);
#endif /* EXTREME_DEBUG */
}
return;
}
void isis_circuit_del_addr(struct isis_circuit *circuit,
struct connected *connected)
{
struct prefix_ipv4 *ipv4, *ip = NULL;
struct listnode *node;
char buf[PREFIX2STR_BUFFER];
struct prefix_ipv6 *ipv6, *ip6 = NULL;
int found = 0;
if (connected->address->family == AF_INET) {
ipv4 = prefix_ipv4_new();
ipv4->prefixlen = connected->address->prefixlen;
ipv4->prefix = connected->address->u.prefix4;
for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, node, ip))
if (prefix_same((struct prefix *)ip,
(struct prefix *)ipv4))
break;
if (ip) {
listnode_delete(circuit->ip_addrs, ip);
prefix_ipv4_free(ip);
if (circuit->area)
lsp_regenerate_schedule(circuit->area,
circuit->is_type, 0);
} else {
prefix2str(connected->address, buf, sizeof(buf));
zlog_warn(
"Nonexistent ip address %s removal attempt from \
circuit %s",
buf, circuit->interface->name);
zlog_warn("Current ip addresses on %s:",
circuit->interface->name);
for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, node,
ip)) {
prefix2str(ip, buf, sizeof(buf));
zlog_warn(" %s", buf);
}
zlog_warn("End of addresses");
}
prefix_ipv4_free(ipv4);
}
if (connected->address->family == AF_INET6) {
ipv6 = prefix_ipv6_new();
ipv6->prefixlen = connected->address->prefixlen;
ipv6->prefix = connected->address->u.prefix6;
if (IN6_IS_ADDR_LINKLOCAL(&ipv6->prefix)) {
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_link, node,
ip6)) {
if (prefix_same((struct prefix *)ip6,
(struct prefix *)ipv6))
break;
}
if (ip6) {
listnode_delete(circuit->ipv6_link, ip6);
prefix_ipv6_free(ip6);
found = 1;
}
} else {
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, node,
ip6)) {
if (prefix_same((struct prefix *)ip6,
(struct prefix *)ipv6))
break;
}
if (ip6) {
listnode_delete(circuit->ipv6_non_link, ip6);
prefix_ipv6_free(ip6);
found = 1;
}
}
if (!found) {
prefix2str(connected->address, buf, sizeof(buf));
zlog_warn(
"Nonexistent ip address %s removal attempt from \
circuit %s",
buf, circuit->interface->name);
zlog_warn("Current ip addresses on %s:",
circuit->interface->name);
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_link, node,
ip6)) {
prefix2str((struct prefix *)ip6, (char *)buf,
sizeof(buf));
zlog_warn(" %s", buf);
}
zlog_warn(" -----");
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, node,
ip6)) {
prefix2str((struct prefix *)ip6, (char *)buf,
sizeof(buf));
zlog_warn(" %s", buf);
}
zlog_warn("End of addresses");
} else if (circuit->area)
lsp_regenerate_schedule(circuit->area, circuit->is_type,
0);
prefix_ipv6_free(ipv6);
}
return;
}
static uint8_t isis_circuit_id_gen(struct isis *isis, struct interface *ifp)
{
/* Circuit ids MUST be unique for any broadcast circuits. Otherwise,
* Pseudo-Node LSPs cannot be generated correctly.
*
* Currently, allocate one circuit ID for any circuit, limiting the total
* numer of circuits IS-IS can run on to 255.
*
* We should revisit this when implementing 3-way adjacencies for p2p, since
* we then have extended interface IDs available.
*/
uint8_t id = ifp->ifindex;
unsigned int i;
for (i = 0; i < 256; i++) {
if (id && !_ISIS_CHECK_FLAG(isis->circuit_ids_used, id))
break;
id++;
}
if (i == 256) {
zlog_warn("Could not allocate a circuit id for '%s'",
ifp->name);
return 0;
}
_ISIS_SET_FLAG(isis->circuit_ids_used, id);
return id;
}
void isis_circuit_if_add(struct isis_circuit *circuit, struct interface *ifp)
{
struct listnode *node, *nnode;
struct connected *conn;
isis_circuit_if_bind(circuit, ifp);
if (if_is_broadcast(ifp)) {
if (fabricd || circuit->circ_type_config == CIRCUIT_T_P2P)
circuit->circ_type = CIRCUIT_T_P2P;
else
circuit->circ_type = CIRCUIT_T_BROADCAST;
} else if (if_is_pointopoint(ifp)) {
circuit->circ_type = CIRCUIT_T_P2P;
} else if (if_is_loopback(ifp)) {
circuit->circ_type = CIRCUIT_T_LOOPBACK;
circuit->is_passive = 1;
} else {
/* It's normal in case of loopback etc. */
if (isis->debugs & DEBUG_EVENTS)
zlog_debug("isis_circuit_if_add: unsupported media");
circuit->circ_type = CIRCUIT_T_UNKNOWN;
}
circuit->ip_addrs = list_new();
circuit->ipv6_link = list_new();
circuit->ipv6_non_link = list_new();
for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, conn))
isis_circuit_add_addr(circuit, conn);
}
void isis_circuit_if_del(struct isis_circuit *circuit, struct interface *ifp)
{
struct listnode *node, *nnode;
struct connected *conn;
assert(circuit->interface == ifp);
/* destroy addresses */
for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, conn))
isis_circuit_del_addr(circuit, conn);
if (circuit->ip_addrs) {
assert(listcount(circuit->ip_addrs) == 0);
list_delete(&circuit->ip_addrs);
}
if (circuit->ipv6_link) {
assert(listcount(circuit->ipv6_link) == 0);
list_delete(&circuit->ipv6_link);
}
if (circuit->ipv6_non_link) {
assert(listcount(circuit->ipv6_non_link) == 0);
list_delete(&circuit->ipv6_non_link);
}
circuit->circ_type = CIRCUIT_T_UNKNOWN;
}
void isis_circuit_if_bind(struct isis_circuit *circuit, struct interface *ifp)
{
assert(circuit != NULL);
assert(ifp != NULL);
if (circuit->interface)
assert(circuit->interface == ifp);
else
circuit->interface = ifp;
if (ifp->info)
assert(ifp->info == circuit);
else
ifp->info = circuit;
isis_link_params_update(circuit, ifp);
}
void isis_circuit_if_unbind(struct isis_circuit *circuit, struct interface *ifp)
{
assert(circuit != NULL);
assert(ifp != NULL);
assert(circuit->interface == ifp);
assert(ifp->info == circuit);
circuit->interface = NULL;
ifp->info = NULL;
}
static void isis_circuit_update_all_srmflags(struct isis_circuit *circuit,
int is_set)
{
struct isis_area *area;
struct isis_lsp *lsp;
dnode_t *dnode;
int level;
assert(circuit);
area = circuit->area;
assert(area);
for (level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++) {
if (!(level & circuit->is_type))
continue;
if (!area->lspdb[level - 1]
|| !dict_count(area->lspdb[level - 1]))
continue;
for (dnode = dict_first(area->lspdb[level - 1]);
dnode != NULL;
dnode = dict_next(area->lspdb[level - 1], dnode)) {
lsp = dnode_get(dnode);
if (is_set) {
isis_tx_queue_add(circuit->tx_queue, lsp,
TX_LSP_NORMAL);
} else {
isis_tx_queue_del(circuit->tx_queue, lsp);
}
}
}
}
size_t isis_circuit_pdu_size(struct isis_circuit *circuit)
{
return ISO_MTU(circuit);
}
void isis_circuit_stream(struct isis_circuit *circuit, struct stream **stream)
{
size_t stream_size = isis_circuit_pdu_size(circuit);
if (!*stream) {
*stream = stream_new(stream_size);
} else {
if (STREAM_SIZE(*stream) != stream_size)
stream_resize_inplace(stream, stream_size);
stream_reset(*stream);
}
}
void isis_circuit_prepare(struct isis_circuit *circuit)
{
#if ISIS_METHOD != ISIS_METHOD_DLPI
thread_add_read(master, isis_receive, circuit, circuit->fd,
&circuit->t_read);
#else
thread_add_timer_msec(master, isis_receive, circuit,
listcount(circuit->area->circuit_list) * 100,
&circuit->t_read);
#endif
}
int isis_circuit_up(struct isis_circuit *circuit)
{
int retv;
/* Set the flags for all the lsps of the circuit. */
isis_circuit_update_all_srmflags(circuit, 1);
if (circuit->state == C_STATE_UP)
return ISIS_OK;
if (circuit->is_passive)
return ISIS_OK;
if (circuit->area->lsp_mtu > isis_circuit_pdu_size(circuit)) {
flog_err(
EC_ISIS_CONFIG,
"Interface MTU %zu on %s is too low to support area lsp mtu %u!",
isis_circuit_pdu_size(circuit),
circuit->interface->name, circuit->area->lsp_mtu);
isis_circuit_update_all_srmflags(circuit, 0);
return ISIS_ERROR;
}
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
circuit->circuit_id = isis_circuit_id_gen(isis, circuit->interface);
if (!circuit->circuit_id) {
flog_err(
EC_ISIS_CONFIG,
"There are already 255 broadcast circuits active!");
return ISIS_ERROR;
}
/*
* Get the Hardware Address
*/
if (circuit->interface->hw_addr_len != ETH_ALEN) {
zlog_warn("unsupported link layer");
} else {
memcpy(circuit->u.bc.snpa, circuit->interface->hw_addr,
ETH_ALEN);
}
#ifdef EXTREME_DEGUG
zlog_debug("isis_circuit_if_add: if_id %d, isomtu %d snpa %s",
circuit->interface->ifindex, ISO_MTU(circuit),
snpa_print(circuit->u.bc.snpa));
#endif /* EXTREME_DEBUG */
circuit->u.bc.adjdb[0] = list_new();
circuit->u.bc.adjdb[1] = list_new();
/*
* ISO 10589 - 8.4.1 Enabling of broadcast circuits
*/
/* initilizing the hello sending threads
* for a broadcast IF
*/
/* 8.4.1 a) commence sending of IIH PDUs */
for (int level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++) {
if (!(circuit->is_type & level))
continue;
send_hello_sched(circuit, level, TRIGGERED_IIH_DELAY);
circuit->u.bc.lan_neighs[level - 1] = list_new();
thread_add_timer(master, isis_run_dr,
&circuit->level_arg[level - 1],
2 * circuit->hello_interval[level - 1],
&circuit->u.bc.t_run_dr[level - 1]);
}
/* 8.4.1 b) FIXME: solicit ES - 8.4.6 */
/* 8.4.1 c) FIXME: listen for ESH PDUs */
} else if (circuit->circ_type == CIRCUIT_T_P2P) {
/* initializing the hello send threads
* for a ptp IF
*/
circuit->u.p2p.neighbor = NULL;
send_hello_sched(circuit, 0, TRIGGERED_IIH_DELAY);
}
/* initializing PSNP timers */
if (circuit->is_type & IS_LEVEL_1)
thread_add_timer(
master, send_l1_psnp, circuit,
isis_jitter(circuit->psnp_interval[0], PSNP_JITTER),
&circuit->t_send_psnp[0]);
if (circuit->is_type & IS_LEVEL_2)
thread_add_timer(
master, send_l2_psnp, circuit,
isis_jitter(circuit->psnp_interval[1], PSNP_JITTER),
&circuit->t_send_psnp[1]);
/* unified init for circuits; ignore warnings below this level */
retv = isis_sock_init(circuit);
if (retv != ISIS_OK) {
isis_circuit_down(circuit);
return retv;
}
/* initialize the circuit streams after opening connection */
isis_circuit_stream(circuit, &circuit->rcv_stream);
isis_circuit_stream(circuit, &circuit->snd_stream);
isis_circuit_prepare(circuit);
circuit->tx_queue = isis_tx_queue_new(circuit, send_lsp);
#ifndef FABRICD
/* send northbound notification */
isis_notif_if_state_change(circuit, false);
#endif /* ifndef FABRICD */
return ISIS_OK;
}
void isis_circuit_down(struct isis_circuit *circuit)
{
#ifndef FABRICD
/* send northbound notification */
isis_notif_if_state_change(circuit, true);
#endif /* ifndef FABRICD */
/* Clear the flags for all the lsps of the circuit. */
isis_circuit_update_all_srmflags(circuit, 0);
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
/* destroy neighbour lists */
if (circuit->u.bc.lan_neighs[0]) {
list_delete(&circuit->u.bc.lan_neighs[0]);
circuit->u.bc.lan_neighs[0] = NULL;
}
if (circuit->u.bc.lan_neighs[1]) {
list_delete(&circuit->u.bc.lan_neighs[1]);
circuit->u.bc.lan_neighs[1] = NULL;
}
/* destroy adjacency databases */
if (circuit->u.bc.adjdb[0]) {
circuit->u.bc.adjdb[0]->del = isis_delete_adj;
list_delete(&circuit->u.bc.adjdb[0]);
circuit->u.bc.adjdb[0] = NULL;
}
if (circuit->u.bc.adjdb[1]) {
circuit->u.bc.adjdb[1]->del = isis_delete_adj;
list_delete(&circuit->u.bc.adjdb[1]);
circuit->u.bc.adjdb[1] = NULL;
}
if (circuit->u.bc.is_dr[0]) {
isis_dr_resign(circuit, 1);
circuit->u.bc.is_dr[0] = 0;
}
memset(circuit->u.bc.l1_desig_is, 0, ISIS_SYS_ID_LEN + 1);
if (circuit->u.bc.is_dr[1]) {
isis_dr_resign(circuit, 2);
circuit->u.bc.is_dr[1] = 0;
}
memset(circuit->u.bc.l2_desig_is, 0, ISIS_SYS_ID_LEN + 1);
memset(circuit->u.bc.snpa, 0, ETH_ALEN);
THREAD_TIMER_OFF(circuit->u.bc.t_send_lan_hello[0]);
THREAD_TIMER_OFF(circuit->u.bc.t_send_lan_hello[1]);
THREAD_TIMER_OFF(circuit->u.bc.t_run_dr[0]);
THREAD_TIMER_OFF(circuit->u.bc.t_run_dr[1]);
THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[0]);
THREAD_TIMER_OFF(circuit->u.bc.t_refresh_pseudo_lsp[1]);
circuit->lsp_regenerate_pending[0] = 0;
circuit->lsp_regenerate_pending[1] = 0;
_ISIS_CLEAR_FLAG(isis->circuit_ids_used, circuit->circuit_id);
circuit->circuit_id = 0;
} else if (circuit->circ_type == CIRCUIT_T_P2P) {
isis_delete_adj(circuit->u.p2p.neighbor);
circuit->u.p2p.neighbor = NULL;
THREAD_TIMER_OFF(circuit->u.p2p.t_send_p2p_hello);
}
/* Cancel all active threads */
THREAD_TIMER_OFF(circuit->t_send_csnp[0]);
THREAD_TIMER_OFF(circuit->t_send_csnp[1]);
THREAD_TIMER_OFF(circuit->t_send_psnp[0]);
THREAD_TIMER_OFF(circuit->t_send_psnp[1]);
THREAD_OFF(circuit->t_read);
if (circuit->tx_queue) {
isis_tx_queue_free(circuit->tx_queue);
circuit->tx_queue = NULL;
}
/* send one gratuitous hello to spead up convergence */
if (circuit->state == C_STATE_UP) {
if (circuit->is_type & IS_LEVEL_1)
send_hello(circuit, IS_LEVEL_1);
if (circuit->is_type & IS_LEVEL_2)
send_hello(circuit, IS_LEVEL_2);
}
circuit->upadjcount[0] = 0;
circuit->upadjcount[1] = 0;
/* close the socket */
if (circuit->fd) {
close(circuit->fd);
circuit->fd = 0;
}
if (circuit->rcv_stream != NULL) {
stream_free(circuit->rcv_stream);
circuit->rcv_stream = NULL;
}
if (circuit->snd_stream != NULL) {
stream_free(circuit->snd_stream);
circuit->snd_stream = NULL;
}
thread_cancel_event(master, circuit);
return;
}
void circuit_update_nlpids(struct isis_circuit *circuit)
{
circuit->nlpids.count = 0;
if (circuit->ip_router) {
circuit->nlpids.nlpids[0] = NLPID_IP;
circuit->nlpids.count++;
}
if (circuit->ipv6_router) {
circuit->nlpids.nlpids[circuit->nlpids.count] = NLPID_IPV6;
circuit->nlpids.count++;
}
return;
}
void isis_circuit_print_vty(struct isis_circuit *circuit, struct vty *vty,
char detail)
{
if (detail == ISIS_UI_LEVEL_BRIEF) {
vty_out(vty, " %-12s", circuit->interface->name);
vty_out(vty, "0x%-7x", circuit->circuit_id);
vty_out(vty, "%-9s", circuit_state2string(circuit->state));
vty_out(vty, "%-9s", circuit_type2string(circuit->circ_type));
vty_out(vty, "%-9s", circuit_t2string(circuit->is_type));
vty_out(vty, "\n");
}
if (detail == ISIS_UI_LEVEL_DETAIL) {
struct listnode *node;
struct prefix *ip_addr;
char buf[BUFSIZ];
vty_out(vty, " Interface: %s", circuit->interface->name);
vty_out(vty, ", State: %s",
circuit_state2string(circuit->state));
if (circuit->is_passive)
vty_out(vty, ", Passive");
else
vty_out(vty, ", Active");
vty_out(vty, ", Circuit Id: 0x%x", circuit->circuit_id);
vty_out(vty, "\n");
vty_out(vty, " Type: %s",
circuit_type2string(circuit->circ_type));
vty_out(vty, ", Level: %s", circuit_t2string(circuit->is_type));
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
vty_out(vty, ", SNPA: %-10s",
snpa_print(circuit->u.bc.snpa));
vty_out(vty, "\n");
if (circuit->is_type & IS_LEVEL_1) {
vty_out(vty, " Level-1 Information:\n");
if (circuit->area->newmetric)
vty_out(vty, " Metric: %d",
circuit->te_metric[0]);
else
vty_out(vty, " Metric: %d",
circuit->metric[0]);
if (!circuit->is_passive) {
vty_out(vty, ", Active neighbors: %u\n",
circuit->upadjcount[0]);
vty_out(vty,
" Hello interval: %u, "
"Holddown count: %u %s\n",
circuit->hello_interval[0],
circuit->hello_multiplier[0],
(circuit->pad_hellos ? "(pad)"
: "(no-pad)"));
vty_out(vty,
" CNSP interval: %u, "
"PSNP interval: %u\n",
circuit->csnp_interval[0],
circuit->psnp_interval[0]);
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
vty_out(vty,
" LAN Priority: %u, %s\n",
circuit->priority[0],
(circuit->u.bc.is_dr[0]
? "is DIS"
: "is not DIS"));
} else {
vty_out(vty, "\n");
}
}
if (circuit->is_type & IS_LEVEL_2) {
vty_out(vty, " Level-2 Information:\n");
if (circuit->area->newmetric)
vty_out(vty, " Metric: %d",
circuit->te_metric[1]);
else
vty_out(vty, " Metric: %d",
circuit->metric[1]);
if (!circuit->is_passive) {
vty_out(vty, ", Active neighbors: %u\n",
circuit->upadjcount[1]);
vty_out(vty,
" Hello interval: %u, "
"Holddown count: %u %s\n",
circuit->hello_interval[1],
circuit->hello_multiplier[1],
(circuit->pad_hellos ? "(pad)"
: "(no-pad)"));
vty_out(vty,
" CNSP interval: %u, "
"PSNP interval: %u\n",
circuit->csnp_interval[1],
circuit->psnp_interval[1]);
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
vty_out(vty,
" LAN Priority: %u, %s\n",
circuit->priority[1],
(circuit->u.bc.is_dr[1]
? "is DIS"
: "is not DIS"));
} else {
vty_out(vty, "\n");
}
}
if (circuit->ip_addrs && listcount(circuit->ip_addrs) > 0) {
vty_out(vty, " IP Prefix(es):\n");
for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, node,
ip_addr)) {
prefix2str(ip_addr, buf, sizeof(buf));
vty_out(vty, " %s\n", buf);
}
}
if (circuit->ipv6_link && listcount(circuit->ipv6_link) > 0) {
vty_out(vty, " IPv6 Link-Locals:\n");
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_link, node,
ip_addr)) {
prefix2str(ip_addr, (char *)buf, BUFSIZ);
vty_out(vty, " %s\n", buf);
}
}
if (circuit->ipv6_non_link
&& listcount(circuit->ipv6_non_link) > 0) {
vty_out(vty, " IPv6 Prefixes:\n");
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, node,
ip_addr)) {
prefix2str(ip_addr, (char *)buf, BUFSIZ);
vty_out(vty, " %s\n", buf);
}
}
vty_out(vty, "\n");
}
return;
}
DEFINE_HOOK(isis_circuit_config_write,
(struct isis_circuit *circuit, struct vty *vty),
(circuit, vty))
#ifdef FABRICD
int isis_interface_config_write(struct vty *vty)
{
struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
int write = 0;
struct listnode *node;
struct interface *ifp;
struct isis_area *area;
struct isis_circuit *circuit;
int i;
FOR_ALL_INTERFACES (vrf, ifp) {
/* IF name */
vty_frame(vty, "interface %s\n", ifp->name);
write++;
/* IF desc */
if (ifp->desc) {
vty_out(vty, " description %s\n", ifp->desc);
write++;
}
/* ISIS Circuit */
for (ALL_LIST_ELEMENTS_RO(isis->area_list, node, area)) {
circuit =
circuit_lookup_by_ifp(ifp, area->circuit_list);
if (circuit == NULL)
continue;
if (circuit->ip_router) {
vty_out(vty, " ip router " PROTO_NAME " %s\n",
area->area_tag);
write++;
}
if (circuit->is_passive) {
vty_out(vty, " " PROTO_NAME " passive\n");
write++;
}
if (circuit->circ_type_config == CIRCUIT_T_P2P) {
vty_out(vty, " " PROTO_NAME " network point-to-point\n");
write++;
}
if (circuit->ipv6_router) {
vty_out(vty, " ipv6 router " PROTO_NAME " %s\n",
area->area_tag);
write++;
}
/* ISIS - circuit type */
if (!fabricd) {
if (circuit->is_type == IS_LEVEL_1) {
vty_out(vty, " " PROTO_NAME " circuit-type level-1\n");
write++;
} else {
if (circuit->is_type == IS_LEVEL_2) {
vty_out(vty,
" " PROTO_NAME " circuit-type level-2-only\n");
write++;
}
}
}
/* ISIS - CSNP interval */
if (circuit->csnp_interval[0]
== circuit->csnp_interval[1]) {
if (circuit->csnp_interval[0]
!= DEFAULT_CSNP_INTERVAL) {
vty_out(vty, " " PROTO_NAME " csnp-interval %d\n",
circuit->csnp_interval[0]);
write++;
}
} else {
for (i = 0; i < 2; i++) {
if (circuit->csnp_interval[i]
!= DEFAULT_CSNP_INTERVAL) {
vty_out(vty,
" " PROTO_NAME " csnp-interval %d level-%d\n",
circuit->csnp_interval
[i],
i + 1);
write++;
}
}
}
/* ISIS - PSNP interval */
if (circuit->psnp_interval[0]
== circuit->psnp_interval[1]) {
if (circuit->psnp_interval[0]
!= DEFAULT_PSNP_INTERVAL) {
vty_out(vty, " " PROTO_NAME " psnp-interval %d\n",
circuit->psnp_interval[0]);
write++;
}
} else {
for (i = 0; i < 2; i++) {
if (circuit->psnp_interval[i]
!= DEFAULT_PSNP_INTERVAL) {
vty_out(vty,
" " PROTO_NAME " psnp-interval %d level-%d\n",
circuit->psnp_interval
[i],
i + 1);
write++;
}
}
}
/* ISIS - Hello padding - Defaults to true so only
* display if false */
if (circuit->pad_hellos == 0) {
vty_out(vty, " no " PROTO_NAME " hello padding\n");
write++;
}
if (circuit->disable_threeway_adj) {
vty_out(vty, " no isis three-way-handshake\n");
write++;
}
/* ISIS - Hello interval */
if (circuit->hello_interval[0]
== circuit->hello_interval[1]) {
if (circuit->hello_interval[0]
!= DEFAULT_HELLO_INTERVAL) {
vty_out(vty,
" " PROTO_NAME " hello-interval %d\n",
circuit->hello_interval[0]);
write++;
}
} else {
for (i = 0; i < 2; i++) {
if (circuit->hello_interval[i]
!= DEFAULT_HELLO_INTERVAL) {
vty_out(vty,
" " PROTO_NAME " hello-interval %d level-%d\n",
circuit->hello_interval
[i],
i + 1);
write++;
}
}
}
/* ISIS - Hello Multiplier */
if (circuit->hello_multiplier[0]
== circuit->hello_multiplier[1]) {
if (circuit->hello_multiplier[0]
!= DEFAULT_HELLO_MULTIPLIER) {
vty_out(vty,
" " PROTO_NAME " hello-multiplier %d\n",
circuit->hello_multiplier[0]);
write++;
}
} else {
for (i = 0; i < 2; i++) {
if (circuit->hello_multiplier[i]
!= DEFAULT_HELLO_MULTIPLIER) {
vty_out(vty,
" " PROTO_NAME " hello-multiplier %d level-%d\n",
circuit->hello_multiplier
[i],
i + 1);
write++;
}
}
}
/* ISIS - Priority */
if (circuit->priority[0] == circuit->priority[1]) {
if (circuit->priority[0] != DEFAULT_PRIORITY) {
vty_out(vty, " " PROTO_NAME " priority %d\n",
circuit->priority[0]);
write++;
}
} else {
for (i = 0; i < 2; i++) {
if (circuit->priority[i]
!= DEFAULT_PRIORITY) {
vty_out(vty,
" " PROTO_NAME " priority %d level-%d\n",
circuit->priority[i],
i + 1);
write++;
}
}
}
/* ISIS - Metric */
if (circuit->te_metric[0] == circuit->te_metric[1]) {
if (circuit->te_metric[0]
!= DEFAULT_CIRCUIT_METRIC) {
vty_out(vty, " " PROTO_NAME " metric %d\n",
circuit->te_metric[0]);
write++;
}
} else {
for (i = 0; i < 2; i++) {
if (circuit->te_metric[i]
!= DEFAULT_CIRCUIT_METRIC) {
vty_out(vty,
" " PROTO_NAME " metric %d level-%d\n",
circuit->te_metric[i],
i + 1);
write++;
}
}
}
if (circuit->passwd.type == ISIS_PASSWD_TYPE_HMAC_MD5) {
vty_out(vty, " " PROTO_NAME " password md5 %s\n",
circuit->passwd.passwd);
write++;
} else if (circuit->passwd.type
== ISIS_PASSWD_TYPE_CLEARTXT) {
vty_out(vty, " " PROTO_NAME " password clear %s\n",
circuit->passwd.passwd);
write++;
}
write += hook_call(isis_circuit_config_write,
circuit, vty);
}
vty_endframe(vty, "!\n");
}
return write;
}
#else
int isis_interface_config_write(struct vty *vty)
{
struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
int write = 0;
struct interface *ifp;
struct isis_circuit *circuit;
struct lyd_node *dnode;
FOR_ALL_INTERFACES (vrf, ifp) {
dnode = yang_dnode_get(
running_config->dnode,
"/frr-interface:lib/interface[name='%s'][vrf='%s']",
ifp->name, vrf->name);
if (dnode == NULL)
continue;
write++;
nb_cli_show_dnode_cmds(vty, dnode, false);
circuit = circuit_scan_by_ifp(ifp);
if (circuit)
write += hook_call(isis_circuit_config_write, circuit,
vty);
}
return write;
}
#endif /* ifdef FABRICD */
struct isis_circuit *isis_circuit_create(struct isis_area *area,
struct interface *ifp)
{
struct isis_circuit *circuit = circuit_scan_by_ifp(ifp);
if (circuit && circuit->area)
return NULL;
circuit = isis_csm_state_change(ISIS_ENABLE, circuit, area);
if (circuit->state != C_STATE_CONF && circuit->state != C_STATE_UP)
return circuit;
isis_circuit_if_bind(circuit, ifp);
return circuit;
}
void isis_circuit_af_set(struct isis_circuit *circuit, bool ip_router,
bool ipv6_router)
{
struct isis_area *area = circuit->area;
bool change = circuit->ip_router != ip_router
|| circuit->ipv6_router != ipv6_router;
area->ip_circuits += ip_router - circuit->ip_router;
area->ipv6_circuits += ipv6_router - circuit->ipv6_router;
circuit->ip_router = ip_router;
circuit->ipv6_router = ipv6_router;
if (!change)
return;
circuit_update_nlpids(circuit);
if (!ip_router && !ipv6_router)
isis_csm_state_change(ISIS_DISABLE, circuit, area);
else
lsp_regenerate_schedule(circuit->area, circuit->is_type, 0);
}
ferr_r isis_circuit_passive_set(struct isis_circuit *circuit, bool passive)
{
if (circuit->is_passive == passive)
return ferr_ok();
if (if_is_loopback(circuit->interface) && !passive)
return ferr_cfg_invalid("loopback is always passive");
if (circuit->state != C_STATE_UP) {
circuit->is_passive = passive;
} else {
struct isis_area *area = circuit->area;
isis_csm_state_change(ISIS_DISABLE, circuit, area);
circuit->is_passive = passive;
isis_csm_state_change(ISIS_ENABLE, circuit, area);
}
return ferr_ok();
}
ferr_r isis_circuit_metric_set(struct isis_circuit *circuit, int level,
int metric)
{
assert(level == IS_LEVEL_1 || level == IS_LEVEL_2);
if (metric > MAX_WIDE_LINK_METRIC)
return ferr_cfg_invalid("metric %d too large for wide metric",
metric);
if (circuit->area && circuit->area->oldmetric
&& metric > MAX_NARROW_LINK_METRIC)
return ferr_cfg_invalid("metric %d too large for narrow metric",
metric);
circuit->te_metric[level - 1] = metric;
circuit->metric[level - 1] = metric;
if (circuit->area)
lsp_regenerate_schedule(circuit->area, level, 0);
return ferr_ok();
}
ferr_r isis_circuit_passwd_unset(struct isis_circuit *circuit)
{
memset(&circuit->passwd, 0, sizeof(circuit->passwd));
return ferr_ok();
}
ferr_r isis_circuit_passwd_set(struct isis_circuit *circuit,
uint8_t passwd_type, const char *passwd)
{
int len;
if (!passwd)
return ferr_code_bug("no circuit password given");
len = strlen(passwd);
if (len > 254)
return ferr_code_bug(
"circuit password too long (max 254 chars)");
circuit->passwd.len = len;
strlcpy((char *)circuit->passwd.passwd, passwd,
sizeof(circuit->passwd.passwd));
circuit->passwd.type = passwd_type;
return ferr_ok();
}
ferr_r isis_circuit_passwd_cleartext_set(struct isis_circuit *circuit,
const char *passwd)
{
return isis_circuit_passwd_set(circuit, ISIS_PASSWD_TYPE_CLEARTXT,
passwd);
}
ferr_r isis_circuit_passwd_hmac_md5_set(struct isis_circuit *circuit,
const char *passwd)
{
return isis_circuit_passwd_set(circuit, ISIS_PASSWD_TYPE_HMAC_MD5,
passwd);
}
struct cmd_node interface_node = {
INTERFACE_NODE, "%s(config-if)# ", 1,
};
void isis_circuit_circ_type_set(struct isis_circuit *circuit, int circ_type)
{
if (circuit->circ_type == circ_type)
return;
if (circuit->state != C_STATE_UP) {
circuit->circ_type = circ_type;
circuit->circ_type_config = circ_type;
} else {
struct isis_area *area = circuit->area;
isis_csm_state_change(ISIS_DISABLE, circuit, area);
circuit->circ_type = circ_type;
circuit->circ_type_config = circ_type;
isis_csm_state_change(ISIS_ENABLE, circuit, area);
}
}
int isis_circuit_mt_enabled_set(struct isis_circuit *circuit, uint16_t mtid,
bool enabled)
{
struct isis_circuit_mt_setting *setting;
setting = circuit_get_mt_setting(circuit, mtid);
if (setting->enabled != enabled) {
setting->enabled = enabled;
lsp_regenerate_schedule(circuit->area, IS_LEVEL_1 | IS_LEVEL_2,
0);
}
return CMD_SUCCESS;
}
int isis_if_new_hook(struct interface *ifp)
{
return 0;
}
int isis_if_delete_hook(struct interface *ifp)
{
struct isis_circuit *circuit;
/* Clean up the circuit data */
if (ifp && ifp->info) {
circuit = ifp->info;
isis_csm_state_change(IF_DOWN_FROM_Z, circuit, circuit->area);
isis_csm_state_change(ISIS_DISABLE, circuit, circuit->area);
}
return 0;
}
void isis_circuit_init(void)
{
/* Initialize Zebra interface data structure */
hook_register_prio(if_add, 0, isis_if_new_hook);
hook_register_prio(if_del, 0, isis_if_delete_hook);
/* Install interface node */
install_node(&interface_node, isis_interface_config_write);
if_cmd_init();
}
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