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mirror_frr/isisd/isis_circuit.c
Donald Sharp 56c1f7d852 frr: Remove HAVE_IPV6 from code base 
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
2017-01-13 08:05:50 -05:00

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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; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <zebra.h>
#ifdef GNU_LINUX
#include <net/ethernet.h>
#else
#include <netinet/if_ether.h>
#endif
#ifndef ETHER_ADDR_LEN
#define ETHER_ADDR_LEN ETHERADDRL
#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 "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_tlv.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"
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 ()
{
struct isis_circuit *circuit;
int i;
circuit = XCALLOC (MTYPE_ISIS_CIRCUIT, sizeof (struct isis_circuit));
if (circuit == NULL)
{
zlog_err ("Can't malloc isis circuit");
return NULL;
}
/*
* Default values
*/
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->mtc = mpls_te_circuit_new();
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);
/* 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)
{
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, sizeof (buf));
zlog_debug ("Added IP address %s to circuit %d", buf,
circuit->circuit_id);
#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 %d", buf,
circuit->circuit_id);
#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);
if (circuit->area)
lsp_regenerate_schedule (circuit->area, circuit->is_type, 0);
}
else
{
prefix2str (connected->address, buf, sizeof (buf));
zlog_warn ("Nonexitant ip address %s removal attempt from \
circuit %d", buf, circuit->circuit_id);
zlog_warn ("Current ip addresses on %s:", circuit->interface->name);
for (ALL_LIST_ELEMENTS_RO(circuit->ip_addrs, node, ip))
{
prefix2str((struct prefix*)ip, (char *)buf, BUFSIZ);
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);
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);
found = 1;
}
}
if (!found)
{
prefix2str (connected->address, buf, sizeof (buf));
zlog_warn ("Nonexitant ip address %s removal attempt from \
circuit %d", buf, circuit->circuit_id);
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, BUFSIZ);
zlog_warn(" %s", buf);
}
zlog_warn(" -----");
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, node, ip6))
{
prefix2str((struct prefix*)ip6, (char *)buf, BUFSIZ);
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 u_char
isis_circuit_id_gen (struct interface *ifp)
{
u_char id = 0;
char ifname[16];
unsigned int i;
int start = -1, end = -1;
/*
* Get a stable circuit id from ifname. This makes
* the ifindex from flapping when netdevs are created
* and deleted on the fly. Note that this circuit id
* is used in pseudo lsps so it is better to be stable.
* The following code works on any reasonanle ifname
* like: eth1 or trk-1.1 etc.
*/
for (i = 0; i < strlen (ifp->name); i++)
{
if (isdigit((unsigned char)ifp->name[i]))
{
if (start < 0)
{
start = i;
end = i + 1;
}
else
{
end = i + 1;
}
}
else if (start >= 0)
break;
}
if ((start >= 0) && (end >= start) && (end - start) < 16)
{
memset (ifname, 0, 16);
strncpy (ifname, &ifp->name[start], end - start);
id = (u_char)atoi(ifname);
}
/* Try to be unique. */
if (!id)
id = (u_char)((ifp->ifindex & 0xff) | 0x80);
return id;
}
void
isis_circuit_if_add (struct isis_circuit *circuit, struct interface *ifp)
{
struct listnode *node, *nnode;
struct connected *conn;
circuit->circuit_id = isis_circuit_id_gen (ifp);
isis_circuit_if_bind (circuit, ifp);
/* isis_circuit_update_addrs (circuit, ifp); */
if (if_is_broadcast (ifp))
{
if (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);
return;
}
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);
circuit->ip_addrs = NULL;
}
if (circuit->ipv6_link)
{
assert (listcount(circuit->ipv6_link) == 0);
list_delete (circuit->ipv6_link);
circuit->ipv6_link = NULL;
}
if (circuit->ipv6_non_link)
{
assert (listcount(circuit->ipv6_non_link) == 0);
list_delete (circuit->ipv6_non_link);
circuit->ipv6_non_link = NULL;
}
circuit->circ_type = CIRCUIT_T_UNKNOWN;
circuit->circuit_id = 0;
return;
}
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, *dnode_next;
int level;
assert (circuit);
area = circuit->area;
assert (area);
for (level = ISIS_LEVEL1; level <= ISIS_LEVEL2; level++)
{
if (level & circuit->is_type)
{
if (area->lspdb[level - 1] &&
dict_count (area->lspdb[level - 1]) > 0)
{
for (dnode = dict_first (area->lspdb[level - 1]);
dnode != NULL; dnode = dnode_next)
{
dnode_next = dict_next (area->lspdb[level - 1], dnode);
lsp = dnode_get (dnode);
if (is_set)
{
ISIS_SET_FLAG (lsp->SRMflags, circuit);
}
else
{
ISIS_CLEAR_FLAG (lsp->SRMflags, circuit);
}
}
}
}
}
}
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(*stream, stream_size);
stream_reset(*stream);
}
}
void
isis_circuit_prepare (struct isis_circuit *circuit)
{
#ifdef GNU_LINUX
THREAD_READ_ON (master, circuit->t_read, isis_receive, circuit,
circuit->fd);
#else
THREAD_TIMER_MSEC_ON (master, circuit->t_read, isis_receive, circuit,
listcount (circuit->area->circuit_list) * 100);
#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))
{
zlog_err("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)
{
/*
* 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 */
if (circuit->is_type & IS_LEVEL_1)
{
thread_add_event (master, send_lan_l1_hello, circuit, 0);
circuit->u.bc.lan_neighs[0] = list_new ();
}
if (circuit->is_type & IS_LEVEL_2)
{
thread_add_event (master, send_lan_l2_hello, circuit, 0);
circuit->u.bc.lan_neighs[1] = list_new ();
}
/* 8.4.1 b) FIXME: solicit ES - 8.4.6 */
/* 8.4.1 c) FIXME: listen for ESH PDUs */
/* 8.4.1 d) */
/* dr election will commence in... */
if (circuit->is_type & IS_LEVEL_1)
THREAD_TIMER_ON (master, circuit->u.bc.t_run_dr[0], isis_run_dr_l1,
circuit, 2 * circuit->hello_interval[0]);
if (circuit->is_type & IS_LEVEL_2)
THREAD_TIMER_ON (master, circuit->u.bc.t_run_dr[1], isis_run_dr_l2,
circuit, 2 * circuit->hello_interval[1]);
}
else
{
/* initializing the hello send threads
* for a ptp IF
*/
circuit->u.p2p.neighbor = NULL;
thread_add_event (master, send_p2p_hello, circuit, 0);
}
/* initializing PSNP timers */
if (circuit->is_type & IS_LEVEL_1)
THREAD_TIMER_ON (master, circuit->t_send_psnp[0], send_l1_psnp, circuit,
isis_jitter (circuit->psnp_interval[0], PSNP_JITTER));
if (circuit->is_type & IS_LEVEL_2)
THREAD_TIMER_ON (master, circuit->t_send_psnp[1], send_l2_psnp, circuit,
isis_jitter (circuit->psnp_interval[1], PSNP_JITTER));
/* 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->lsp_queue = list_new ();
circuit->lsp_queue_last_cleared = time (NULL);
return ISIS_OK;
}
void
isis_circuit_down (struct isis_circuit *circuit)
{
if (circuit->state != C_STATE_UP)
return;
/* 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;
}
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->lsp_queue)
{
circuit->lsp_queue->del = NULL;
list_delete (circuit->lsp_queue);
circuit->lsp_queue = NULL;
}
/* send one gratuitous hello to spead up convergence */
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, "%s", VTY_NEWLINE);
}
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, "%s", VTY_NEWLINE);
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, "%s", VTY_NEWLINE);
if (circuit->is_type & IS_LEVEL_1)
{
vty_out (vty, " Level-1 Information:%s", VTY_NEWLINE);
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%s",
circuit->upadjcount[0], VTY_NEWLINE);
vty_out (vty, " Hello interval: %u, "
"Holddown count: %u %s%s",
circuit->hello_interval[0],
circuit->hello_multiplier[0],
(circuit->pad_hellos ? "(pad)" : "(no-pad)"),
VTY_NEWLINE);
vty_out (vty, " CNSP interval: %u, "
"PSNP interval: %u%s",
circuit->csnp_interval[0],
circuit->psnp_interval[0], VTY_NEWLINE);
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
vty_out (vty, " LAN Priority: %u, %s%s",
circuit->priority[0],
(circuit->u.bc.is_dr[0] ? \
"is DIS" : "is not DIS"), VTY_NEWLINE);
}
else
{
vty_out (vty, "%s", VTY_NEWLINE);
}
}
if (circuit->is_type & IS_LEVEL_2)
{
vty_out (vty, " Level-2 Information:%s", VTY_NEWLINE);
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%s",
circuit->upadjcount[1], VTY_NEWLINE);
vty_out (vty, " Hello interval: %u, "
"Holddown count: %u %s%s",
circuit->hello_interval[1],
circuit->hello_multiplier[1],
(circuit->pad_hellos ? "(pad)" : "(no-pad)"),
VTY_NEWLINE);
vty_out (vty, " CNSP interval: %u, "
"PSNP interval: %u%s",
circuit->csnp_interval[1],
circuit->psnp_interval[1], VTY_NEWLINE);
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
vty_out (vty, " LAN Priority: %u, %s%s",
circuit->priority[1],
(circuit->u.bc.is_dr[1] ? \
"is DIS" : "is not DIS"), VTY_NEWLINE);
}
else
{
vty_out (vty, "%s", VTY_NEWLINE);
}
}
if (circuit->ip_addrs && listcount (circuit->ip_addrs) > 0)
{
vty_out (vty, " IP Prefix(es):%s", VTY_NEWLINE);
for (ALL_LIST_ELEMENTS_RO (circuit->ip_addrs, node, ip_addr))
{
prefix2str (ip_addr, buf, sizeof (buf)),
vty_out (vty, " %s%s", buf, VTY_NEWLINE);
}
}
if (circuit->ipv6_link && listcount(circuit->ipv6_link) > 0)
{
vty_out(vty, " IPv6 Link-Locals:%s", VTY_NEWLINE);
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_link, node, ip_addr))
{
prefix2str(ip_addr, (char*)buf, BUFSIZ),
vty_out(vty, " %s%s", buf, VTY_NEWLINE);
}
}
if (circuit->ipv6_non_link && listcount(circuit->ipv6_non_link) > 0)
{
vty_out(vty, " IPv6 Prefixes:%s", VTY_NEWLINE);
for (ALL_LIST_ELEMENTS_RO(circuit->ipv6_non_link, node, ip_addr))
{
prefix2str(ip_addr, (char*)buf, BUFSIZ),
vty_out(vty, " %s%s", buf, VTY_NEWLINE);
}
}
vty_out (vty, "%s", VTY_NEWLINE);
}
return;
}
int
isis_interface_config_write (struct vty *vty)
{
int write = 0;
struct listnode *node, *node2;
struct interface *ifp;
struct isis_area *area;
struct isis_circuit *circuit;
int i;
for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp))
{
if (ifp->ifindex == IFINDEX_DELETED)
continue;
/* IF name */
vty_out (vty, "interface %s%s", ifp->name, VTY_NEWLINE);
write++;
/* IF desc */
if (ifp->desc)
{
vty_out (vty, " description %s%s", ifp->desc, VTY_NEWLINE);
write++;
}
/* ISIS Circuit */
for (ALL_LIST_ELEMENTS_RO (isis->area_list, node2, area))
{
circuit = circuit_lookup_by_ifp (ifp, area->circuit_list);
if (circuit == NULL)
continue;
if (circuit->ip_router)
{
vty_out (vty, " ip router isis %s%s", area->area_tag,
VTY_NEWLINE);
write++;
}
if (circuit->is_passive)
{
vty_out (vty, " isis passive%s", VTY_NEWLINE);
write++;
}
if (circuit->circ_type_config == CIRCUIT_T_P2P)
{
vty_out (vty, " isis network point-to-point%s", VTY_NEWLINE);
write++;
}
if (circuit->ipv6_router)
{
vty_out (vty, " ipv6 router isis %s%s", area->area_tag,
VTY_NEWLINE);
write++;
}
/* ISIS - circuit type */
if (circuit->is_type == IS_LEVEL_1)
{
vty_out (vty, " isis circuit-type level-1%s", VTY_NEWLINE);
write++;
}
else
{
if (circuit->is_type == IS_LEVEL_2)
{
vty_out (vty, " isis circuit-type level-2-only%s",
VTY_NEWLINE);
write++;
}
}
/* ISIS - CSNP interval */
if (circuit->csnp_interval[0] == circuit->csnp_interval[1])
{
if (circuit->csnp_interval[0] != DEFAULT_CSNP_INTERVAL)
{
vty_out (vty, " isis csnp-interval %d%s",
circuit->csnp_interval[0], VTY_NEWLINE);
write++;
}
}
else
{
for (i = 0; i < 2; i++)
{
if (circuit->csnp_interval[i] != DEFAULT_CSNP_INTERVAL)
{
vty_out (vty, " isis csnp-interval %d level-%d%s",
circuit->csnp_interval[i], i + 1, VTY_NEWLINE);
write++;
}
}
}
/* ISIS - PSNP interval */
if (circuit->psnp_interval[0] == circuit->psnp_interval[1])
{
if (circuit->psnp_interval[0] != DEFAULT_PSNP_INTERVAL)
{
vty_out (vty, " isis psnp-interval %d%s",
circuit->psnp_interval[0], VTY_NEWLINE);
write++;
}
}
else
{
for (i = 0; i < 2; i++)
{
if (circuit->psnp_interval[i] != DEFAULT_PSNP_INTERVAL)
{
vty_out (vty, " isis psnp-interval %d level-%d%s",
circuit->psnp_interval[i], i + 1, VTY_NEWLINE);
write++;
}
}
}
/* ISIS - Hello padding - Defaults to true so only display if false */
if (circuit->pad_hellos == 0)
{
vty_out (vty, " no isis hello padding%s", VTY_NEWLINE);
write++;
}
/* ISIS - Hello interval */
if (circuit->hello_interval[0] == circuit->hello_interval[1])
{
if (circuit->hello_interval[0] != DEFAULT_HELLO_INTERVAL)
{
vty_out (vty, " isis hello-interval %d%s",
circuit->hello_interval[0], VTY_NEWLINE);
write++;
}
}
else
{
for (i = 0; i < 2; i++)
{
if (circuit->hello_interval[i] != DEFAULT_HELLO_INTERVAL)
{
vty_out (vty, " isis hello-interval %d level-%d%s",
circuit->hello_interval[i], i + 1, VTY_NEWLINE);
write++;
}
}
}
/* ISIS - Hello Multiplier */
if (circuit->hello_multiplier[0] == circuit->hello_multiplier[1])
{
if (circuit->hello_multiplier[0] != DEFAULT_HELLO_MULTIPLIER)
{
vty_out (vty, " isis hello-multiplier %d%s",
circuit->hello_multiplier[0], VTY_NEWLINE);
write++;
}
}
else
{
for (i = 0; i < 2; i++)
{
if (circuit->hello_multiplier[i] != DEFAULT_HELLO_MULTIPLIER)
{
vty_out (vty, " isis hello-multiplier %d level-%d%s",
circuit->hello_multiplier[i], i + 1,
VTY_NEWLINE);
write++;
}
}
}
/* ISIS - Priority */
if (circuit->priority[0] == circuit->priority[1])
{
if (circuit->priority[0] != DEFAULT_PRIORITY)
{
vty_out (vty, " isis priority %d%s",
circuit->priority[0], VTY_NEWLINE);
write++;
}
}
else
{
for (i = 0; i < 2; i++)
{
if (circuit->priority[i] != DEFAULT_PRIORITY)
{
vty_out (vty, " isis priority %d level-%d%s",
circuit->priority[i], i + 1, VTY_NEWLINE);
write++;
}
}
}
/* ISIS - Metric */
if (circuit->te_metric[0] == circuit->te_metric[1])
{
if (circuit->te_metric[0] != DEFAULT_CIRCUIT_METRIC)
{
vty_out (vty, " isis metric %d%s", circuit->te_metric[0],
VTY_NEWLINE);
write++;
}
}
else
{
for (i = 0; i < 2; i++)
{
if (circuit->te_metric[i] != DEFAULT_CIRCUIT_METRIC)
{
vty_out (vty, " isis metric %d level-%d%s",
circuit->te_metric[i], i + 1, VTY_NEWLINE);
write++;
}
}
}
if (circuit->passwd.type == ISIS_PASSWD_TYPE_HMAC_MD5)
{
vty_out (vty, " isis password md5 %s%s", circuit->passwd.passwd,
VTY_NEWLINE);
write++;
}
else if (circuit->passwd.type == ISIS_PASSWD_TYPE_CLEARTXT)
{
vty_out (vty, " isis password clear %s%s", circuit->passwd.passwd,
VTY_NEWLINE);
write++;
}
}
vty_out (vty, "!%s", VTY_NEWLINE);
}
return write;
}
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;
bool was_enabled = !!circuit->area;
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 if (!was_enabled)
isis_csm_state_change (ISIS_ENABLE, circuit, area);
else
lsp_regenerate_schedule(circuit->area, circuit->is_type, 0);
}
int
isis_circuit_passive_set (struct isis_circuit *circuit, bool passive)
{
if (circuit->is_passive == passive)
return 0;
if (if_is_loopback (circuit->interface) && !passive)
return -1;
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 0;
}
int
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 -1;
if (circuit->area && circuit->area->oldmetric
&& metric > MAX_NARROW_LINK_METRIC)
return -1;
circuit->te_metric[level - 1] = metric;
circuit->metric[level - 1] = metric;
if (circuit->area)
lsp_regenerate_schedule (circuit->area, level, 0);
return 0;
}
int
isis_circuit_passwd_unset (struct isis_circuit *circuit)
{
memset(&circuit->passwd, 0, sizeof(circuit->passwd));
return 0;
}
static int
isis_circuit_passwd_set (struct isis_circuit *circuit, u_char passwd_type, const char *passwd)
{
int len;
if (!passwd)
return -1;
len = strlen(passwd);
if (len > 254)
return -1;
circuit->passwd.len = len;
strncpy((char *)circuit->passwd.passwd, passwd, 255);
circuit->passwd.type = passwd_type;
return 0;
}
int
isis_circuit_passwd_cleartext_set (struct isis_circuit *circuit, const char *passwd)
{
return isis_circuit_passwd_set (circuit, ISIS_PASSWD_TYPE_CLEARTXT, passwd);
}
int
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,
};
int
isis_circuit_circ_type_set(struct isis_circuit *circuit, int circ_type)
{
/* Changing the network type to/of loopback or unknown interfaces
* is not supported. */
if (circ_type == CIRCUIT_T_UNKNOWN
|| circ_type == CIRCUIT_T_LOOPBACK
|| circuit->circ_type == CIRCUIT_T_LOOPBACK)
{
if (circuit->circ_type != circ_type)
return -1;
else
return 0;
}
if (circuit->circ_type == circ_type)
return 0;
if (circuit->state != C_STATE_UP)
{
circuit->circ_type = circ_type;
circuit->circ_type_config = circ_type;
}
else
{
struct isis_area *area = circuit->area;
if (circ_type == CIRCUIT_T_BROADCAST
&& !if_is_broadcast(circuit->interface))
return -1;
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);
}
return 0;
}
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 ()
{
/* Initialize Zebra interface data structure */
if_add_hook (IF_NEW_HOOK, isis_if_new_hook);
if_add_hook (IF_DELETE_HOOK, isis_if_delete_hook);
/* Install interface node */
install_node (&interface_node, isis_interface_config_write);
if_cmd_init ();
isis_vty_init ();
}
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