/*
* IS-IS Rout(e)ing protocol - isis_lsp.c
* LSP processing
*
* 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 "linklist.h"
#include "thread.h"
#include "vty.h"
#include "stream.h"
#include "memory.h"
#include "log.h"
#include "prefix.h"
#include "command.h"
#include "hash.h"
#include "if.h"
#include "checksum.h"
#include "isisd/dict.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_circuit.h"
#include "isisd/isisd.h"
#include "isisd/isis_tlv.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_dynhn.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_csm.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_spf.h"
#ifdef TOPOLOGY_GENERATE
#include "spgrid.h"
#endif
#define LSP_MEMORY_PREASSIGN
extern struct isis *isis;
extern struct thread_master *master;
extern struct in_addr router_id_zebra;
/* staticly assigned vars for printing purposes */
char lsp_bits_string[200]; /* FIXME: enough ? */
int
lsp_id_cmp (u_char * id1, u_char * id2)
{
return memcmp (id1, id2, ISIS_SYS_ID_LEN + 2);
}
dict_t *
lsp_db_init (void)
{
dict_t *dict;
dict = dict_create (DICTCOUNT_T_MAX, (dict_comp_t) lsp_id_cmp);
return dict;
}
struct isis_lsp *
lsp_search (u_char * id, dict_t * lspdb)
{
dnode_t *node;
#ifdef EXTREME_DEBUG
dnode_t *dn;
zlog_debug ("searching db");
for (dn = dict_first (lspdb); dn; dn = dict_next (lspdb, dn))
{
zlog_debug ("%s\t%pX", rawlspid_print ((char *) dnode_getkey (dn)),
dnode_get (dn));
}
#endif /* EXTREME DEBUG */
node = dict_lookup (lspdb, id);
if (node)
return (struct isis_lsp *) dnode_get (node);
return NULL;
}
static void
lsp_clear_data (struct isis_lsp *lsp)
{
if (!lsp)
return;
if (lsp->own_lsp)
{
if (lsp->tlv_data.nlpids)
XFREE (MTYPE_ISIS_TLV, lsp->tlv_data.nlpids);
if (lsp->tlv_data.hostname)
XFREE (MTYPE_ISIS_TLV, lsp->tlv_data.hostname);
}
if (lsp->tlv_data.is_neighs)
list_delete (lsp->tlv_data.is_neighs);
if (lsp->tlv_data.te_is_neighs)
list_delete (lsp->tlv_data.te_is_neighs);
if (lsp->tlv_data.area_addrs)
list_delete (lsp->tlv_data.area_addrs);
if (lsp->tlv_data.es_neighs)
list_delete (lsp->tlv_data.es_neighs);
if (lsp->tlv_data.ipv4_addrs)
list_delete (lsp->tlv_data.ipv4_addrs);
if (lsp->tlv_data.ipv4_int_reachs)
list_delete (lsp->tlv_data.ipv4_int_reachs);
if (lsp->tlv_data.ipv4_ext_reachs)
list_delete (lsp->tlv_data.ipv4_ext_reachs);
if (lsp->tlv_data.te_ipv4_reachs)
list_delete (lsp->tlv_data.te_ipv4_reachs);
#ifdef HAVE_IPV6
if (lsp->tlv_data.ipv6_addrs)
list_delete (lsp->tlv_data.ipv6_addrs);
if (lsp->tlv_data.ipv6_reachs)
list_delete (lsp->tlv_data.ipv6_reachs);
#endif /* HAVE_IPV6 */
memset (&lsp->tlv_data, 0, sizeof (struct tlvs));
return;
}
static void
lsp_destroy (struct isis_lsp *lsp)
{
if (!lsp)
return;
lsp_clear_data (lsp);
if (LSP_FRAGMENT (lsp->lsp_header->lsp_id) == 0 && lsp->lspu.frags)
{
list_delete (lsp->lspu.frags);
}
if (lsp->pdu)
stream_free (lsp->pdu);
XFREE (MTYPE_ISIS_LSP, lsp);
}
void
lsp_db_destroy (dict_t * lspdb)
{
dnode_t *dnode, *next;
struct isis_lsp *lsp;
dnode = dict_first (lspdb);
while (dnode)
{
next = dict_next (lspdb, dnode);
lsp = dnode_get (dnode);
lsp_destroy (lsp);
dict_delete_free (lspdb, dnode);
dnode = next;
}
dict_free (lspdb);
return;
}
/*
* Remove all the frags belonging to the given lsp
*/
static void
lsp_remove_frags (struct list *frags, dict_t * lspdb)
{
dnode_t *dnode;
struct listnode *lnode, *lnnode;
struct isis_lsp *lsp;
for (ALL_LIST_ELEMENTS (frags, lnode, lnnode, lsp))
{
dnode = dict_lookup (lspdb, lsp->lsp_header->lsp_id);
lsp_destroy (lsp);
dnode_destroy (dict_delete (lspdb, dnode));
}
list_delete_all_node (frags);
return;
}
void
lsp_search_and_destroy (u_char * id, dict_t * lspdb)
{
dnode_t *node;
struct isis_lsp *lsp;
node = dict_lookup (lspdb, id);
if (node)
{
node = dict_delete (lspdb, node);
lsp = dnode_get (node);
/*
* If this is a zero lsp, remove all the frags now
*/
if (LSP_FRAGMENT (lsp->lsp_header->lsp_id) == 0)
{
if (lsp->lspu.frags)
lsp_remove_frags (lsp->lspu.frags, lspdb);
}
else
{
/*
* else just remove this frag, from the zero lsps' frag list
*/
if (lsp->lspu.zero_lsp && lsp->lspu.zero_lsp->lspu.frags)
listnode_delete (lsp->lspu.zero_lsp->lspu.frags, lsp);
}
lsp_destroy (lsp);
dnode_destroy (node);
}
}
/*
* Compares a LSP to given values
* Params are given in net order
*/
int
lsp_compare (char *areatag, struct isis_lsp *lsp, u_int32_t seq_num,
u_int16_t checksum, u_int16_t rem_lifetime)
{
/* no point in double ntohl on seqnum */
if (lsp->lsp_header->seq_num == seq_num &&
lsp->lsp_header->checksum == checksum &&
/*comparing with 0, no need to do ntohl */
((lsp->lsp_header->rem_lifetime == 0 && rem_lifetime == 0) ||
(lsp->lsp_header->rem_lifetime != 0 && rem_lifetime != 0)))
{
if (isis->debugs & DEBUG_SNP_PACKETS)
{
zlog_debug ("ISIS-Snp (%s): LSP %s seq 0x%08x, cksum 0x%04x,"
" lifetime %us",
areatag,
rawlspid_print (lsp->lsp_header->lsp_id),
ntohl (lsp->lsp_header->seq_num),
ntohs (lsp->lsp_header->checksum),
ntohs (lsp->lsp_header->rem_lifetime));
zlog_debug ("ISIS-Snp (%s): is equal to ours seq 0x%08x,"
" cksum 0x%04x, lifetime %us",
areatag,
ntohl (seq_num), ntohs (checksum), ntohs (rem_lifetime));
}
return LSP_EQUAL;
}
if (ntohl (seq_num) >= ntohl (lsp->lsp_header->seq_num))
{
if (isis->debugs & DEBUG_SNP_PACKETS)
{
zlog_debug ("ISIS-Snp (%s): LSP %s seq 0x%08x, cksum 0x%04x,"
" lifetime %us",
areatag,
rawlspid_print (lsp->lsp_header->lsp_id),
ntohl (seq_num), ntohs (checksum), ntohs (rem_lifetime));
zlog_debug ("ISIS-Snp (%s): is newer than ours seq 0x%08x, "
"cksum 0x%04x, lifetime %us",
areatag,
ntohl (lsp->lsp_header->seq_num),
ntohs (lsp->lsp_header->checksum),
ntohs (lsp->lsp_header->rem_lifetime));
}
return LSP_NEWER;
}
if (isis->debugs & DEBUG_SNP_PACKETS)
{
zlog_debug
("ISIS-Snp (%s): LSP %s seq 0x%08x, cksum 0x%04x, lifetime %us",
areatag, rawlspid_print (lsp->lsp_header->lsp_id), ntohl (seq_num),
ntohs (checksum), ntohs (rem_lifetime));
zlog_debug ("ISIS-Snp (%s): is older than ours seq 0x%08x,"
" cksum 0x%04x, lifetime %us", areatag,
ntohl (lsp->lsp_header->seq_num),
ntohs (lsp->lsp_header->checksum),
ntohs (lsp->lsp_header->rem_lifetime));
}
return LSP_OLDER;
}
void
lsp_inc_seqnum (struct isis_lsp *lsp, u_int32_t seq_num)
{
u_int32_t newseq;
if (seq_num == 0 || ntohl (lsp->lsp_header->seq_num) > seq_num)
newseq = ntohl (lsp->lsp_header->seq_num) + 1;
else
newseq = seq_num++;
lsp->lsp_header->seq_num = htonl (newseq);
fletcher_checksum (STREAM_DATA (lsp->pdu) + 12,
ntohs (lsp->lsp_header->pdu_len) - 12, 12);
return;
}
/*
* Genetates checksum for LSP and its frags
*/
static void
lsp_seqnum_update (struct isis_lsp *lsp0)
{
struct isis_lsp *lsp;
struct listnode *node;
lsp_inc_seqnum (lsp0, 0);
if (!lsp0->lspu.frags)
return;
for (ALL_LIST_ELEMENTS_RO (lsp0->lspu.frags, node, lsp))
lsp_inc_seqnum (lsp, 0);
return;
}
int
isis_lsp_authinfo_check (struct stream *stream, struct isis_area *area,
int pdulen, struct isis_passwd *passwd)
{
uint32_t expected = 0, found;
struct tlvs tlvs;
int retval = 0;
expected |= TLVFLAG_AUTH_INFO;
retval = parse_tlvs (area->area_tag, stream->data +
ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN,
pdulen - ISIS_FIXED_HDR_LEN
- ISIS_LSP_HDR_LEN, &expected, &found, &tlvs);
if (retval || !(found & TLVFLAG_AUTH_INFO))
return 1; /* Auth fail (parsing failed or no auth-tlv) */
return authentication_check (passwd, &tlvs.auth_info);
}
static void
lsp_update_data (struct isis_lsp *lsp, struct stream *stream,
struct isis_area *area)
{
uint32_t expected = 0, found;
int retval;
/* copying only the relevant part of our stream */
lsp->pdu = stream_dup (stream);
/* setting pointers to the correct place */
lsp->isis_header = (struct isis_fixed_hdr *) (STREAM_DATA (lsp->pdu));
lsp->lsp_header = (struct isis_link_state_hdr *) (STREAM_DATA (lsp->pdu) +
ISIS_FIXED_HDR_LEN);
lsp->age_out = ZERO_AGE_LIFETIME;
lsp->installed = time (NULL);
/*
* Get LSP data i.e. TLVs
*/
expected |= TLVFLAG_AUTH_INFO;
expected |= TLVFLAG_AREA_ADDRS;
expected |= TLVFLAG_IS_NEIGHS;
if ((lsp->lsp_header->lsp_bits & 3) == 3) /* a level 2 LSP */
expected |= TLVFLAG_PARTITION_DESIG_LEVEL2_IS;
expected |= TLVFLAG_NLPID;
if (area->dynhostname)
expected |= TLVFLAG_DYN_HOSTNAME;
if (area->newmetric)
{
expected |= TLVFLAG_TE_IS_NEIGHS;
expected |= TLVFLAG_TE_IPV4_REACHABILITY;
expected |= TLVFLAG_TE_ROUTER_ID;
}
expected |= TLVFLAG_IPV4_ADDR;
expected |= TLVFLAG_IPV4_INT_REACHABILITY;
expected |= TLVFLAG_IPV4_EXT_REACHABILITY;
#ifdef HAVE_IPV6
expected |= TLVFLAG_IPV6_ADDR;
expected |= TLVFLAG_IPV6_REACHABILITY;
#endif /* HAVE_IPV6 */
retval = parse_tlvs (area->area_tag, lsp->pdu->data +
ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN,
ntohs (lsp->lsp_header->pdu_len) - ISIS_FIXED_HDR_LEN
- ISIS_LSP_HDR_LEN, &expected, &found, &lsp->tlv_data);
if (found & TLVFLAG_DYN_HOSTNAME)
{
if (area->dynhostname)
isis_dynhn_insert (lsp->lsp_header->lsp_id, lsp->tlv_data.hostname,
(lsp->lsp_header->lsp_bits & LSPBIT_IST) ==
IS_LEVEL_1_AND_2 ? IS_LEVEL_2 :
(lsp->lsp_header->lsp_bits & LSPBIT_IST));
}
}
void
lsp_update (struct isis_lsp *lsp, struct isis_link_state_hdr *lsp_hdr,
struct stream *stream, struct isis_area *area, int level)
{
dnode_t *dnode = NULL;
/* Remove old LSP from LSP database. */
dnode = dict_lookup (area->lspdb[level - 1], lsp->lsp_header->lsp_id);
if (dnode)
dnode_destroy (dict_delete (area->lspdb[level - 1], dnode));
/* free the old lsp data */
XFREE (MTYPE_STREAM_DATA, lsp->pdu);
lsp_clear_data (lsp);
/* rebuild the lsp data */
lsp_update_data (lsp, stream, area);
/* set the new values for lsp header */
memcpy (lsp->lsp_header, lsp_hdr, ISIS_LSP_HDR_LEN);
if (dnode)
lsp_insert (lsp, area->lspdb[level - 1]);
}
/* creation of LSP directly from what we received */
struct isis_lsp *
lsp_new_from_stream_ptr (struct stream *stream,
u_int16_t pdu_len, struct isis_lsp *lsp0,
struct isis_area *area)
{
struct isis_lsp *lsp;
lsp = XCALLOC (MTYPE_ISIS_LSP, sizeof (struct isis_lsp));
lsp_update_data (lsp, stream, area);
if (lsp0 == NULL)
{
/*
* zero lsp -> create the list for fragments
*/
lsp->lspu.frags = list_new ();
}
else
{
/*
* a fragment -> set the backpointer and add this to zero lsps frag list
*/
lsp->lspu.zero_lsp = lsp0;
listnode_add (lsp0->lspu.frags, lsp);
}
return lsp;
}
struct isis_lsp *
lsp_new (u_char * lsp_id, u_int16_t rem_lifetime, u_int32_t seq_num,
u_int8_t lsp_bits, u_int16_t checksum, int level)
{
struct isis_lsp *lsp;
lsp = XCALLOC (MTYPE_ISIS_LSP, sizeof (struct isis_lsp));
if (!lsp)
{
/* FIXME: set lspdbol bit */
zlog_warn ("lsp_new(): out of memory");
return NULL;
}
#ifdef LSP_MEMORY_PREASSIGN
lsp->pdu = stream_new (1514); /*Should be minimal mtu? yup... */
#else
/* We need to do realloc on TLVs additions */
lsp->pdu = malloc (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
#endif /* LSP_MEMORY_PREASSIGN */
if (LSP_FRAGMENT (lsp_id) == 0)
lsp->lspu.frags = list_new ();
lsp->isis_header = (struct isis_fixed_hdr *) (STREAM_DATA (lsp->pdu));
lsp->lsp_header = (struct isis_link_state_hdr *)
(STREAM_DATA (lsp->pdu) + ISIS_FIXED_HDR_LEN);
/* at first we fill the FIXED HEADER */
(level == 1) ? fill_fixed_hdr (lsp->isis_header, L1_LINK_STATE) :
fill_fixed_hdr (lsp->isis_header, L2_LINK_STATE);
/* now for the LSP HEADER */
/* Minimal LSP PDU size */
lsp->lsp_header->pdu_len = htons (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
memcpy (lsp->lsp_header->lsp_id, lsp_id, ISIS_SYS_ID_LEN + 2);
lsp->lsp_header->checksum = checksum; /* Provided in network order */
lsp->lsp_header->seq_num = htonl (seq_num);
lsp->lsp_header->rem_lifetime = htons (rem_lifetime);
lsp->lsp_header->lsp_bits = lsp_bits;
lsp->level = level;
lsp->age_out = ZERO_AGE_LIFETIME;
stream_forward_endp (lsp->pdu, ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
if (isis->debugs & DEBUG_EVENTS)
zlog_debug ("New LSP with ID %s-%02x-%02x seqnum %08x",
sysid_print (lsp_id), LSP_PSEUDO_ID (lsp->lsp_header->lsp_id),
LSP_FRAGMENT (lsp->lsp_header->lsp_id),
ntohl (lsp->lsp_header->seq_num));
return lsp;
}
void
lsp_insert (struct isis_lsp *lsp, dict_t * lspdb)
{
dict_alloc_insert (lspdb, lsp->lsp_header->lsp_id, lsp);
}
/*
* Build a list of LSPs with non-zero ht bounded by start and stop ids
*/
void
lsp_build_list_nonzero_ht (u_char * start_id, u_char * stop_id,
struct list *list, dict_t * lspdb)
{
dnode_t *first, *last, *curr;
first = dict_lower_bound (lspdb, start_id);
if (!first)
return;
last = dict_upper_bound (lspdb, stop_id);
curr = first;
if (((struct isis_lsp *) (curr->dict_data))->lsp_header->rem_lifetime)
listnode_add (list, first->dict_data);
while (curr)
{
curr = dict_next (lspdb, curr);
if (curr &&
((struct isis_lsp *) (curr->dict_data))->lsp_header->rem_lifetime)
listnode_add (list, curr->dict_data);
if (curr == last)
break;
}
return;
}
/*
* Build a list of all LSPs bounded by start and stop ids
*/
void
lsp_build_list (u_char * start_id, u_char * stop_id,
struct list *list, dict_t * lspdb)
{
dnode_t *first, *last, *curr;
first = dict_lower_bound (lspdb, start_id);
if (!first)
return;
last = dict_upper_bound (lspdb, stop_id);
curr = first;
listnode_add (list, first->dict_data);
while (curr)
{
curr = dict_next (lspdb, curr);
if (curr)
listnode_add (list, curr->dict_data);
if (curr == last)
break;
}
return;
}
/*
* Build a list of LSPs with SSN flag set for the given circuit
*/
void
lsp_build_list_ssn (struct isis_circuit *circuit, struct list *list,
dict_t * lspdb)
{
dnode_t *dnode, *next;
struct isis_lsp *lsp;
dnode = dict_first (lspdb);
while (dnode != NULL)
{
next = dict_next (lspdb, dnode);
lsp = dnode_get (dnode);
if (ISIS_CHECK_FLAG (lsp->SSNflags, circuit))
listnode_add (list, lsp);
dnode = next;
}
return;
}
static void
lsp_set_time (struct isis_lsp *lsp)
{
assert (lsp);
if (lsp->lsp_header->rem_lifetime == 0)
{
if (lsp->age_out != 0)
lsp->age_out--;
return;
}
/* If we are turning 0 */
/* ISO 10589 - 7.3.16.4 first paragraph */
if (ntohs (lsp->lsp_header->rem_lifetime) == 1)
{
/* 7.3.16.4 a) set SRM flags on all */
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
/* 7.3.16.4 b) retain only the header FIXME */
/* 7.3.16.4 c) record the time to purge FIXME (other way to do it) */
}
lsp->lsp_header->rem_lifetime =
htons (ntohs (lsp->lsp_header->rem_lifetime) - 1);
}
static void
lspid_print (u_char * lsp_id, u_char * trg, char dynhost, char frag)
{
struct isis_dynhn *dyn = NULL;
u_char id[SYSID_STRLEN];
if (dynhost)
dyn = dynhn_find_by_id (lsp_id);
else
dyn = NULL;
if (dyn)
sprintf ((char *)id, "%.14s", dyn->name.name);
else if (!memcmp (isis->sysid, lsp_id, ISIS_SYS_ID_LEN) & dynhost)
sprintf ((char *)id, "%.14s", unix_hostname ());
else
{
memcpy (id, sysid_print (lsp_id), 15);
}
if (frag)
sprintf ((char *)trg, "%s.%02x-%02x", id, LSP_PSEUDO_ID (lsp_id),
LSP_FRAGMENT (lsp_id));
else
sprintf ((char *)trg, "%s.%02x", id, LSP_PSEUDO_ID (lsp_id));
}
/* Convert the lsp attribute bits to attribute string */
const char *
lsp_bits2string (u_char * lsp_bits)
{
char *pos = lsp_bits_string;
if (!*lsp_bits)
return " none";
/* we only focus on the default metric */
pos += sprintf (pos, "%d/",
ISIS_MASK_LSP_ATT_DEFAULT_BIT (*lsp_bits) ? 1 : 0);
pos += sprintf (pos, "%d/",
ISIS_MASK_LSP_PARTITION_BIT (*lsp_bits) ? 1 : 0);
pos += sprintf (pos, "%d", ISIS_MASK_LSP_OL_BIT (*lsp_bits) ? 1 : 0);
*(pos) = '\0';
return lsp_bits_string;
}
/* this function prints the lsp on show isis database */
static void
lsp_print (dnode_t * node, struct vty *vty, char dynhost)
{
struct isis_lsp *lsp = dnode_get (node);
u_char LSPid[255];
lspid_print (lsp->lsp_header->lsp_id, LSPid, dynhost, 1);
vty_out (vty, "%-21s%c ", LSPid, lsp->own_lsp ? '*' : ' ');
vty_out (vty, "0x%08x ", ntohl (lsp->lsp_header->seq_num));
vty_out (vty, "0x%04x ", ntohs (lsp->lsp_header->checksum));
if (ntohs (lsp->lsp_header->rem_lifetime) == 0)
vty_out (vty, " (%2u)", lsp->age_out);
else
vty_out (vty, "%5u", ntohs (lsp->lsp_header->rem_lifetime));
vty_out (vty, " %s%s",
lsp_bits2string (&lsp->lsp_header->lsp_bits), VTY_NEWLINE);
}
static void
lsp_print_detail (dnode_t * node, struct vty *vty, char dynhost)
{
struct isis_lsp *lsp = dnode_get (node);
struct area_addr *area_addr;
int i;
struct listnode *lnode;
struct is_neigh *is_neigh;
struct te_is_neigh *te_is_neigh;
struct ipv4_reachability *ipv4_reach;
struct in_addr *ipv4_addr;
struct te_ipv4_reachability *te_ipv4_reach;
#ifdef HAVE_IPV6
struct ipv6_reachability *ipv6_reach;
struct in6_addr in6;
u_char buff[BUFSIZ];
#endif
u_char LSPid[255];
u_char hostname[255];
u_char ipv4_reach_prefix[20];
u_char ipv4_reach_mask[20];
u_char ipv4_address[20];
lspid_print (lsp->lsp_header->lsp_id, LSPid, dynhost, 1);
lsp_print (node, vty, dynhost);
/* for all area address */
if (lsp->tlv_data.area_addrs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.area_addrs, lnode, area_addr))
{
vty_out (vty, " Area Address: %s%s",
isonet_print (area_addr->area_addr, area_addr->addr_len),
VTY_NEWLINE);
}
/* for the nlpid tlv */
if (lsp->tlv_data.nlpids)
{
for (i = 0; i < lsp->tlv_data.nlpids->count; i++)
{
switch (lsp->tlv_data.nlpids->nlpids[i])
{
case NLPID_IP:
case NLPID_IPV6:
vty_out (vty, " NLPID: 0x%X%s",
lsp->tlv_data.nlpids->nlpids[i], VTY_NEWLINE);
break;
default:
vty_out (vty, " NLPID: %s%s", "unknown", VTY_NEWLINE);
break;
}
}
}
/* for the hostname tlv */
if (lsp->tlv_data.hostname)
{
memset (hostname, 0, sizeof (hostname));
memcpy (hostname, lsp->tlv_data.hostname->name,
lsp->tlv_data.hostname->namelen);
vty_out (vty, " Hostname: %s%s", hostname, VTY_NEWLINE);
}
if (lsp->tlv_data.ipv4_addrs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv4_addrs, lnode, ipv4_addr))
{
memcpy (ipv4_address, inet_ntoa (*ipv4_addr), sizeof (ipv4_address));
vty_out (vty, " IP: %s%s", ipv4_address, VTY_NEWLINE);
}
/* TE router id */
if (lsp->tlv_data.router_id)
{
memcpy (ipv4_address, inet_ntoa (lsp->tlv_data.router_id->id),
sizeof (ipv4_address));
vty_out (vty, " Router ID: %s%s", ipv4_address, VTY_NEWLINE);
}
/* for the IS neighbor tlv */
if (lsp->tlv_data.is_neighs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.is_neighs, lnode, is_neigh))
{
lspid_print (is_neigh->neigh_id, LSPid, dynhost, 0);
vty_out (vty, " Metric: %-10d IS %s%s",
is_neigh->metrics.metric_default, LSPid, VTY_NEWLINE);
}
/* for the internal reachable tlv */
if (lsp->tlv_data.ipv4_int_reachs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv4_int_reachs, lnode,
ipv4_reach))
{
memcpy (ipv4_reach_prefix, inet_ntoa (ipv4_reach->prefix),
sizeof (ipv4_reach_prefix));
memcpy (ipv4_reach_mask, inet_ntoa (ipv4_reach->mask),
sizeof (ipv4_reach_mask));
vty_out (vty, " Metric: %-10d IP-Internal %s %s%s",
ipv4_reach->metrics.metric_default, ipv4_reach_prefix,
ipv4_reach_mask, VTY_NEWLINE);
}
/* for the external reachable tlv */
if (lsp->tlv_data.ipv4_ext_reachs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv4_ext_reachs, lnode,
ipv4_reach))
{
memcpy (ipv4_reach_prefix, inet_ntoa (ipv4_reach->prefix),
sizeof (ipv4_reach_prefix));
memcpy (ipv4_reach_mask, inet_ntoa (ipv4_reach->mask),
sizeof (ipv4_reach_mask));
vty_out (vty, " Metric: %-10d IP-External %s %s%s",
ipv4_reach->metrics.metric_default, ipv4_reach_prefix,
ipv4_reach_mask, VTY_NEWLINE);
}
/* IPv6 tlv */
#ifdef HAVE_IPV6
if (lsp->tlv_data.ipv6_reachs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.ipv6_reachs, lnode, ipv6_reach))
{
memset (&in6, 0, sizeof (in6));
memcpy (in6.s6_addr, ipv6_reach->prefix,
PSIZE (ipv6_reach->prefix_len));
inet_ntop (AF_INET6, &in6, (char *)buff, BUFSIZ);
if ((ipv6_reach->control_info &&
CTRL_INFO_DISTRIBUTION) == DISTRIBUTION_INTERNAL)
vty_out (vty, " Metric: %-10d IPv6-Internal %s/%d%s",
ntohl (ipv6_reach->metric),
buff, ipv6_reach->prefix_len, VTY_NEWLINE);
else
vty_out (vty, " Metric: %-10d IPv6-External %s/%d%s",
ntohl (ipv6_reach->metric),
buff, ipv6_reach->prefix_len, VTY_NEWLINE);
}
#endif
/* TE IS neighbor tlv */
if (lsp->tlv_data.te_is_neighs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_is_neighs, lnode, te_is_neigh))
{
uint32_t metric;
memcpy (&metric, te_is_neigh->te_metric, 3);
lspid_print (te_is_neigh->neigh_id, LSPid, dynhost, 0);
vty_out (vty, " Metric: %-10d IS-Extended %s%s",
ntohl (metric << 8), LSPid, VTY_NEWLINE);
}
/* TE IPv4 tlv */
if (lsp->tlv_data.te_ipv4_reachs)
for (ALL_LIST_ELEMENTS_RO (lsp->tlv_data.te_ipv4_reachs, lnode,
te_ipv4_reach))
{
/* FIXME: There should be better way to output this stuff. */
vty_out (vty, " Metric: %-10d IP-Extended %s/%d%s",
ntohl (te_ipv4_reach->te_metric),
inet_ntoa (newprefix2inaddr (&te_ipv4_reach->prefix_start,
te_ipv4_reach->control)),
te_ipv4_reach->control & 0x3F, VTY_NEWLINE);
}
return;
}
/* print all the lsps info in the local lspdb */
int
lsp_print_all (struct vty *vty, dict_t * lspdb, char detail, char dynhost)
{
dnode_t *node = dict_first (lspdb), *next;
int lsp_count = 0;
/* print the title, for both modes */
vty_out (vty, "LSP ID LSP Seq Num LSP Checksum "
"LSP Holdtime ATT/P/OL%s", VTY_NEWLINE);
if (detail == ISIS_UI_LEVEL_BRIEF)
{
while (node != NULL)
{
/* I think it is unnecessary, so I comment it out */
/* dict_contains (lspdb, node); */
next = dict_next (lspdb, node);
lsp_print (node, vty, dynhost);
node = next;
lsp_count++;
}
}
else if (detail == ISIS_UI_LEVEL_DETAIL)
{
while (node != NULL)
{
next = dict_next (lspdb, node);
lsp_print_detail (node, vty, dynhost);
node = next;
lsp_count++;
}
}
return lsp_count;
}
#define FRAG_THOLD(S,T) \
((STREAM_SIZE(S)*T)/100)
/* stream*, area->lsp_frag_threshold, increment */
#define FRAG_NEEDED(S,T,I) \
(STREAM_SIZE(S)-STREAM_REMAIN(S)+(I) > FRAG_THOLD(S,T))
/* FIXME: It shouldn't be necessary to pass tlvsize here, TLVs can have
* variable length (TE TLVs, sub TLVs). */
static void
lsp_tlv_fit (struct isis_lsp *lsp, struct list **from, struct list **to,
int tlvsize, int frag_thold,
int tlv_build_func (struct list *, struct stream *))
{
int count, i;
/* can we fit all ? */
if (!FRAG_NEEDED (lsp->pdu, frag_thold, listcount (*from) * tlvsize + 2))
{
tlv_build_func (*from, lsp->pdu);
*to = *from;
*from = NULL;
}
else if (!FRAG_NEEDED (lsp->pdu, frag_thold, tlvsize + 2))
{
/* fit all we can */
count = FRAG_THOLD (lsp->pdu, frag_thold) - 2 -
(STREAM_SIZE (lsp->pdu) - STREAM_REMAIN (lsp->pdu));
if (count)
count = count / tlvsize;
for (i = 0; i < count; i++)
{
listnode_add (*to, listgetdata (listhead (*from)));
listnode_delete (*from, listgetdata (listhead (*from)));
}
tlv_build_func (*to, lsp->pdu);
}
lsp->lsp_header->pdu_len = htons (stream_get_endp (lsp->pdu));
return;
}
static struct isis_lsp *
lsp_next_frag (u_char frag_num, struct isis_lsp *lsp0, struct isis_area *area,
int level)
{
struct isis_lsp *lsp;
u_char frag_id[ISIS_SYS_ID_LEN + 2];
memcpy (frag_id, lsp0->lsp_header->lsp_id, ISIS_SYS_ID_LEN + 1);
LSP_FRAGMENT (frag_id) = frag_num;
lsp = lsp_search (frag_id, area->lspdb[level - 1]);
if (lsp)
{
/*
* Clear the TLVs, but inherit the authinfo
*/
lsp_clear_data (lsp);
if (lsp0->tlv_data.auth_info.type)
{
memcpy (&lsp->tlv_data.auth_info, &lsp->tlv_data.auth_info,
sizeof (struct isis_passwd));
tlv_add_authinfo (lsp->tlv_data.auth_info.type,
lsp->tlv_data.auth_info.len,
lsp->tlv_data.auth_info.passwd, lsp->pdu);
}
return lsp;
}
lsp = lsp_new (frag_id, area->max_lsp_lifetime[level - 1], 0, area->is_type,
0, level);
lsp->own_lsp = 1;
lsp_insert (lsp, area->lspdb[level - 1]);
listnode_add (lsp0->lspu.frags, lsp);
lsp->lspu.zero_lsp = lsp0;
/*
* Copy the authinfo from zero LSP
*/
if (lsp0->tlv_data.auth_info.type)
{
memcpy (&lsp->tlv_data.auth_info, &lsp->tlv_data.auth_info,
sizeof (struct isis_passwd));
tlv_add_authinfo (lsp->tlv_data.auth_info.type,
lsp->tlv_data.auth_info.len,
lsp->tlv_data.auth_info.passwd, lsp->pdu);
}
return lsp;
}
/*
* Builds the LSP data part. This func creates a new frag whenever
* area->lsp_frag_threshold is exceeded.
*/
static void
lsp_build_nonpseudo (struct isis_lsp *lsp, struct isis_area *area)
{
struct is_neigh *is_neigh;
struct te_is_neigh *te_is_neigh;
struct listnode *node, *ipnode;
int level = lsp->level;
struct isis_circuit *circuit;
struct prefix_ipv4 *ipv4;
struct ipv4_reachability *ipreach;
struct te_ipv4_reachability *te_ipreach;
struct isis_adjacency *nei;
#ifdef HAVE_IPV6
struct prefix_ipv6 *ipv6, *ip6prefix;
struct ipv6_reachability *ip6reach;
#endif /* HAVE_IPV6 */
struct tlvs tlv_data;
struct isis_lsp *lsp0 = lsp;
struct isis_passwd *passwd;
struct in_addr *routerid;
/*
* First add the tlvs related to area
*/
/* Area addresses */
if (lsp->tlv_data.area_addrs == NULL)
lsp->tlv_data.area_addrs = list_new ();
list_add_list (lsp->tlv_data.area_addrs, area->area_addrs);
/* Protocols Supported */
if (area->ip_circuits > 0
#ifdef HAVE_IPV6
|| area->ipv6_circuits > 0
#endif /* HAVE_IPV6 */
)
{
lsp->tlv_data.nlpids = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct nlpids));
lsp->tlv_data.nlpids->count = 0;
if (area->ip_circuits > 0)
{
lsp->tlv_data.nlpids->count++;
lsp->tlv_data.nlpids->nlpids[0] = NLPID_IP;
}
#ifdef HAVE_IPV6
if (area->ipv6_circuits > 0)
{
lsp->tlv_data.nlpids->count++;
lsp->tlv_data.nlpids->nlpids[lsp->tlv_data.nlpids->count - 1] =
NLPID_IPV6;
}
#endif /* HAVE_IPV6 */
}
/* Dynamic Hostname */
if (area->dynhostname)
{
lsp->tlv_data.hostname = XMALLOC (MTYPE_ISIS_TLV,
sizeof (struct hostname));
memcpy (lsp->tlv_data.hostname->name, unix_hostname (),
strlen (unix_hostname ()));
lsp->tlv_data.hostname->namelen = strlen (unix_hostname ());
}
/*
* Building the zero lsp
*/
/* Reset stream endp. Stream is always there and on every LSP refresh only
* TLV part of it is overwritten. So we must seek past header we will not
* touch. */
stream_reset (lsp->pdu);
stream_forward_endp (lsp->pdu, ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
/*
* Add the authentication info if its present
*/
(level == 1) ? (passwd = &area->area_passwd) :
(passwd = &area->domain_passwd);
if (passwd->type)
{
memcpy (&lsp->tlv_data.auth_info, passwd, sizeof (struct isis_passwd));
tlv_add_authinfo (passwd->type, passwd->len, passwd->passwd, lsp->pdu);
}
if (lsp->tlv_data.nlpids)
tlv_add_nlpid (lsp->tlv_data.nlpids, lsp->pdu);
if (lsp->tlv_data.hostname)
tlv_add_dynamic_hostname (lsp->tlv_data.hostname, lsp->pdu);
if (lsp->tlv_data.area_addrs && listcount (lsp->tlv_data.area_addrs) > 0)
tlv_add_area_addrs (lsp->tlv_data.area_addrs, lsp->pdu);
/* IPv4 address and TE router ID TLVs. In case of the first one we don't
* follow "C" vendor, but "J" vendor behavior - one IPv4 address is put into
* LSP and this address is same as router id. */
if (router_id_zebra.s_addr != 0)
{
if (lsp->tlv_data.ipv4_addrs == NULL)
{
lsp->tlv_data.ipv4_addrs = list_new ();
lsp->tlv_data.ipv4_addrs->del = free_tlv;
}
routerid = XMALLOC (MTYPE_ISIS_TLV, sizeof (struct in_addr));
routerid->s_addr = router_id_zebra.s_addr;
listnode_add (lsp->tlv_data.ipv4_addrs, routerid);
tlv_add_in_addr (routerid, lsp->pdu, IPV4_ADDR);
/* Exactly same data is put into TE router ID TLV, but only if new style
* TLV's are in use. */
if (area->newmetric)
{
lsp->tlv_data.router_id = XMALLOC (MTYPE_ISIS_TLV,
sizeof (struct in_addr));
lsp->tlv_data.router_id->id.s_addr = router_id_zebra.s_addr;
tlv_add_in_addr (&lsp->tlv_data.router_id->id, lsp->pdu, TE_ROUTER_ID);
}
}
memset (&tlv_data, 0, sizeof (struct tlvs));
#ifdef TOPOLOGY_GENERATE
/* If topology exists (and we create topology for level 1 only), create
* (hardcoded) link to topology. */
if (area->topology && level == 1)
{
if (tlv_data.is_neighs == NULL)
{
tlv_data.is_neighs = list_new ();
tlv_data.is_neighs->del = free_tlv;
}
is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh));
memcpy (&is_neigh->neigh_id, area->topology_baseis, ISIS_SYS_ID_LEN);
is_neigh->neigh_id[ISIS_SYS_ID_LEN - 1] = (1 & 0xFF);
is_neigh->neigh_id[ISIS_SYS_ID_LEN - 2] = ((1 >> 8) & 0xFF);
is_neigh->metrics.metric_default = 0x01;
is_neigh->metrics.metric_delay = METRICS_UNSUPPORTED;
is_neigh->metrics.metric_expense = METRICS_UNSUPPORTED;
is_neigh->metrics.metric_error = METRICS_UNSUPPORTED;
listnode_add (tlv_data.is_neighs, is_neigh);
}
#endif /* TOPOLOGY_GENERATE */
/*
* Then build lists of tlvs related to circuits
*/
for (ALL_LIST_ELEMENTS_RO (area->circuit_list, node, circuit))
{
if (circuit->state != C_STATE_UP)
continue;
/*
* Add IPv4 internal reachability of this circuit
*/
if (circuit->ip_router && circuit->ip_addrs &&
circuit->ip_addrs->count > 0)
{
if (area->oldmetric)
{
if (tlv_data.ipv4_int_reachs == NULL)
{
tlv_data.ipv4_int_reachs = list_new ();
tlv_data.ipv4_int_reachs->del = free_tlv;
}
for (ALL_LIST_ELEMENTS_RO (circuit->ip_addrs, ipnode, ipv4))
{
ipreach =
XMALLOC (MTYPE_ISIS_TLV, sizeof (struct ipv4_reachability));
ipreach->metrics = circuit->metrics[level - 1];
masklen2ip (ipv4->prefixlen, &ipreach->mask);
ipreach->prefix.s_addr = ((ipreach->mask.s_addr) &
(ipv4->prefix.s_addr));
listnode_add (tlv_data.ipv4_int_reachs, ipreach);
}
tlv_data.ipv4_int_reachs->del = free_tlv;
}
if (area->newmetric)
{
if (tlv_data.te_ipv4_reachs == NULL)
{
tlv_data.te_ipv4_reachs = list_new ();
tlv_data.te_ipv4_reachs->del = free_tlv;
}
for (ALL_LIST_ELEMENTS_RO (circuit->ip_addrs, ipnode, ipv4))
{
/* FIXME All this assumes that we have no sub TLVs. */
te_ipreach = XCALLOC (MTYPE_ISIS_TLV,
sizeof (struct te_ipv4_reachability) +
((ipv4->prefixlen + 7)/8) - 1);
if (area->oldmetric)
te_ipreach->te_metric = htonl (circuit->metrics[level - 1].metric_default);
else
te_ipreach->te_metric = htonl (circuit->te_metric[level - 1]);
te_ipreach->control = (ipv4->prefixlen & 0x3F);
memcpy (&te_ipreach->prefix_start, &ipv4->prefix.s_addr,
(ipv4->prefixlen + 7)/8);
listnode_add (tlv_data.te_ipv4_reachs, te_ipreach);
}
}
}
#ifdef HAVE_IPV6
/*
* Add IPv6 reachability of this circuit
*/
if (circuit->ipv6_router && circuit->ipv6_non_link &&
circuit->ipv6_non_link->count > 0)
{
if (tlv_data.ipv6_reachs == NULL)
{
tlv_data.ipv6_reachs = list_new ();
tlv_data.ipv6_reachs->del = free_tlv;
}
for (ALL_LIST_ELEMENTS_RO (circuit->ipv6_non_link, ipnode, ipv6))
{
ip6reach =
XCALLOC (MTYPE_ISIS_TLV, sizeof (struct ipv6_reachability));
if (area->oldmetric)
ip6reach->metric =
htonl (circuit->metrics[level - 1].metric_default);
else
ip6reach->metric = htonl (circuit->te_metric[level - 1]);
ip6reach->control_info = 0;
ip6reach->prefix_len = ipv6->prefixlen;
memcpy (&ip6prefix, &ipv6, sizeof(ip6prefix));
apply_mask_ipv6 (ip6prefix);
memcpy (ip6reach->prefix, ip6prefix->prefix.s6_addr,
sizeof (ip6reach->prefix));
listnode_add (tlv_data.ipv6_reachs, ip6reach);
}
}
#endif /* HAVE_IPV6 */
switch (circuit->circ_type)
{
case CIRCUIT_T_BROADCAST:
if (level & circuit->circuit_is_type)
{
if (area->oldmetric)
{
if (tlv_data.is_neighs == NULL)
{
tlv_data.is_neighs = list_new ();
tlv_data.is_neighs->del = free_tlv;
}
is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh));
if (level == 1)
memcpy (is_neigh->neigh_id,
circuit->u.bc.l1_desig_is, ISIS_SYS_ID_LEN + 1);
else
memcpy (is_neigh->neigh_id,
circuit->u.bc.l2_desig_is, ISIS_SYS_ID_LEN + 1);
is_neigh->metrics = circuit->metrics[level - 1];
listnode_add (tlv_data.is_neighs, is_neigh);
tlv_data.is_neighs->del = free_tlv;
}
if (area->newmetric)
{
uint32_t metric;
if (tlv_data.te_is_neighs == NULL)
{
tlv_data.te_is_neighs = list_new ();
tlv_data.te_is_neighs->del = free_tlv;
}
te_is_neigh = XCALLOC (MTYPE_ISIS_TLV,
sizeof (struct te_is_neigh));
if (level == 1)
memcpy (te_is_neigh->neigh_id,
circuit->u.bc.l1_desig_is, ISIS_SYS_ID_LEN + 1);
else
memcpy (te_is_neigh->neigh_id,
circuit->u.bc.l2_desig_is, ISIS_SYS_ID_LEN + 1);
if (area->oldmetric)
metric =
((htonl(circuit->metrics[level - 1].metric_default) >> 8)
& 0xffffff);
else
metric = ((htonl(*circuit->te_metric) >> 8) & 0xffffff);
memcpy (te_is_neigh->te_metric, &metric, 3);
listnode_add (tlv_data.te_is_neighs, te_is_neigh);
}
}
break;
case CIRCUIT_T_P2P:
nei = circuit->u.p2p.neighbor;
if (nei && (level & nei->circuit_t))
{
if (area->oldmetric)
{
if (tlv_data.is_neighs == NULL)
{
tlv_data.is_neighs = list_new ();
tlv_data.is_neighs->del = free_tlv;
}
is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh));
memcpy (is_neigh->neigh_id, nei->sysid, ISIS_SYS_ID_LEN);
is_neigh->metrics = circuit->metrics[level - 1];
listnode_add (tlv_data.is_neighs, is_neigh);
}
if (area->newmetric)
{
uint32_t metric;
if (tlv_data.te_is_neighs == NULL)
{
tlv_data.te_is_neighs = list_new ();
tlv_data.te_is_neighs->del = free_tlv;
}
te_is_neigh = XCALLOC (MTYPE_ISIS_TLV,
sizeof (struct te_is_neigh));
memcpy (te_is_neigh->neigh_id, nei->sysid, ISIS_SYS_ID_LEN);
metric = ((htonl(*circuit->te_metric) >> 8) & 0xffffff);
memcpy (te_is_neigh->te_metric, &metric, 3);
listnode_add (tlv_data.te_is_neighs, te_is_neigh);
}
}
break;
case CIRCUIT_T_STATIC_IN:
zlog_warn ("lsp_area_create: unsupported circuit type");
break;
case CIRCUIT_T_STATIC_OUT:
zlog_warn ("lsp_area_create: unsupported circuit type");
break;
case CIRCUIT_T_DA:
zlog_warn ("lsp_area_create: unsupported circuit type");
break;
default:
zlog_warn ("lsp_area_create: unknown circuit type");
}
}
while (tlv_data.ipv4_int_reachs && listcount (tlv_data.ipv4_int_reachs))
{
if (lsp->tlv_data.ipv4_int_reachs == NULL)
lsp->tlv_data.ipv4_int_reachs = list_new ();
lsp_tlv_fit (lsp, &tlv_data.ipv4_int_reachs,
&lsp->tlv_data.ipv4_int_reachs,
IPV4_REACH_LEN, area->lsp_frag_threshold,
tlv_add_ipv4_reachs);
if (tlv_data.ipv4_int_reachs && listcount (tlv_data.ipv4_int_reachs))
lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1,
lsp0, area, level);
}
/* FIXME: We pass maximum te_ipv4_reachability length to the lsp_tlv_fit()
* for now. lsp_tlv_fit() needs to be fixed to deal with variable length
* TLVs (sub TLVs!). */
while (tlv_data.te_ipv4_reachs && listcount (tlv_data.te_ipv4_reachs))
{
if (lsp->tlv_data.te_ipv4_reachs == NULL)
lsp->tlv_data.te_ipv4_reachs = list_new ();
lsp_tlv_fit (lsp, &tlv_data.te_ipv4_reachs,
&lsp->tlv_data.te_ipv4_reachs,
9, area->lsp_frag_threshold, tlv_add_te_ipv4_reachs);
if (tlv_data.te_ipv4_reachs && listcount (tlv_data.te_ipv4_reachs))
lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1,
lsp0, area, level);
}
#ifdef HAVE_IPV6
while (tlv_data.ipv6_reachs && listcount (tlv_data.ipv6_reachs))
{
if (lsp->tlv_data.ipv6_reachs == NULL)
lsp->tlv_data.ipv6_reachs = list_new ();
lsp_tlv_fit (lsp, &tlv_data.ipv6_reachs,
&lsp->tlv_data.ipv6_reachs,
IPV6_REACH_LEN, area->lsp_frag_threshold,
tlv_add_ipv6_reachs);
if (tlv_data.ipv6_reachs && listcount (tlv_data.ipv6_reachs))
lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1,
lsp0, area, level);
}
#endif /* HAVE_IPV6 */
while (tlv_data.is_neighs && listcount (tlv_data.is_neighs))
{
if (lsp->tlv_data.is_neighs == NULL)
lsp->tlv_data.is_neighs = list_new ();
lsp_tlv_fit (lsp, &tlv_data.is_neighs,
&lsp->tlv_data.is_neighs,
IS_NEIGHBOURS_LEN, area->lsp_frag_threshold,
tlv_add_is_neighs);
if (tlv_data.is_neighs && listcount (tlv_data.is_neighs))
lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1,
lsp0, area, level);
}
while (tlv_data.te_is_neighs && listcount (tlv_data.te_is_neighs))
{
if (lsp->tlv_data.te_is_neighs == NULL)
lsp->tlv_data.te_is_neighs = list_new ();
lsp_tlv_fit (lsp, &tlv_data.te_is_neighs, &lsp->tlv_data.te_is_neighs,
IS_NEIGHBOURS_LEN, area->lsp_frag_threshold,
tlv_add_te_is_neighs);
if (tlv_data.te_is_neighs && listcount (tlv_data.te_is_neighs))
lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1,
lsp0, area, level);
}
free_tlvs (&tlv_data);
return;
}
/*
* 7.3.7 Generation on non-pseudonode LSPs
*/
static int
lsp_generate_non_pseudo (struct isis_area *area, int level)
{
struct isis_lsp *oldlsp, *newlsp;
u_int32_t seq_num = 0;
u_char lspid[ISIS_SYS_ID_LEN + 2];
memset (&lspid, 0, ISIS_SYS_ID_LEN + 2);
memcpy (&lspid, isis->sysid, ISIS_SYS_ID_LEN);
/* only builds the lsp if the area shares the level */
if ((area->is_type & level) == level)
{
oldlsp = lsp_search (lspid, area->lspdb[level - 1]);
if (oldlsp)
{
seq_num = ntohl (oldlsp->lsp_header->seq_num);
lsp_search_and_destroy (oldlsp->lsp_header->lsp_id,
area->lspdb[level - 1]);
/* FIXME: we should actually initiate a purge */
}
newlsp = lsp_new (lspid, area->max_lsp_lifetime[level - 1], seq_num,
area->is_type, 0, level);
newlsp->own_lsp = 1;
lsp_insert (newlsp, area->lspdb[level - 1]);
/* build_lsp_data (newlsp, area); */
lsp_build_nonpseudo (newlsp, area);
/* time to calculate our checksum */
lsp_seqnum_update (newlsp);
}
/* DEBUG_ADJ_PACKETS */
if (isis->debugs & DEBUG_ADJ_PACKETS)
{
/* FIXME: is this place right? fix missing info */
zlog_debug ("ISIS-Upd (%s): Building L%d LSP", area->area_tag, level);
}
return ISIS_OK;
}
/*
* 7.3.9 Generation of level 1 LSPs (non-pseudonode)
*/
int
lsp_l1_generate (struct isis_area *area)
{
THREAD_TIMER_ON (master, area->t_lsp_refresh[0], lsp_refresh_l1, area,
MAX_LSP_GEN_INTERVAL);
return lsp_generate_non_pseudo (area, 1);
}
/*
* 7.3.9 Generation of level 2 LSPs (non-pseudonode)
*/
int
lsp_l2_generate (struct isis_area *area)
{
THREAD_TIMER_ON (master, area->t_lsp_refresh[1], lsp_refresh_l2, area,
MAX_LSP_GEN_INTERVAL);
return lsp_generate_non_pseudo (area, 2);
}
static int
lsp_non_pseudo_regenerate (struct isis_area *area, int level)
{
dict_t *lspdb = area->lspdb[level - 1];
struct isis_lsp *lsp, *frag;
struct listnode *node;
u_char lspid[ISIS_SYS_ID_LEN + 2];
memset (lspid, 0, ISIS_SYS_ID_LEN + 2);
memcpy (lspid, isis->sysid, ISIS_SYS_ID_LEN);
lsp = lsp_search (lspid, lspdb);
if (!lsp)
{
zlog_err
("ISIS-Upd (%s): lsp_non_pseudo_regenerate(): no L%d LSP found!",
area->area_tag, level);
return ISIS_ERROR;
}
lsp_clear_data (lsp);
lsp_build_nonpseudo (lsp, area);
lsp->lsp_header->rem_lifetime = htons (isis_jitter
(area->max_lsp_lifetime[level - 1],
MAX_AGE_JITTER));
lsp_seqnum_update (lsp);
if (isis->debugs & DEBUG_UPDATE_PACKETS)
{
zlog_debug ("ISIS-Upd (%s): refreshing our L%d LSP %s, "
"seq 0x%08x, cksum 0x%04x lifetime %us",
area->area_tag,
level,
rawlspid_print (lsp->lsp_header->lsp_id),
ntohl (lsp->lsp_header->seq_num),
ntohs (lsp->lsp_header->checksum),
ntohs (lsp->lsp_header->rem_lifetime));
}
lsp->last_generated = time (NULL);
area->lsp_regenerate_pending[level - 1] = 0;
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
for (ALL_LIST_ELEMENTS_RO (lsp->lspu.frags, node, frag))
{
frag->lsp_header->rem_lifetime = htons (isis_jitter
(area->
max_lsp_lifetime[level - 1],
MAX_AGE_JITTER));
ISIS_FLAGS_SET_ALL (frag->SRMflags);
}
if (area->ip_circuits)
isis_spf_schedule (area, level);
#ifdef HAVE_IPV6
if (area->ipv6_circuits)
isis_spf_schedule6 (area, level);
#endif
return ISIS_OK;
}
/*
* Done at least every MAX_LSP_GEN_INTERVAL. Search own LSPs, update holding
* time and set SRM
*/
int
lsp_refresh_l1 (struct thread *thread)
{
struct isis_area *area;
unsigned long ref_time;
area = THREAD_ARG (thread);
assert (area);
area->t_lsp_refresh[0] = NULL;
if (area->is_type & IS_LEVEL_1)
lsp_non_pseudo_regenerate (area, 1);
ref_time = area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : area->lsp_refresh[0];
THREAD_TIMER_ON (master, area->t_lsp_refresh[0], lsp_refresh_l1, area,
isis_jitter (ref_time, MAX_AGE_JITTER));
return ISIS_OK;
}
int
lsp_refresh_l2 (struct thread *thread)
{
struct isis_area *area;
unsigned long ref_time;
area = THREAD_ARG (thread);
assert (area);
area->t_lsp_refresh[1] = NULL;
if (area->is_type & IS_LEVEL_2)
lsp_non_pseudo_regenerate (area, 2);
ref_time = area->lsp_refresh[1] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : area->lsp_refresh[1];
THREAD_TIMER_ON (master, area->t_lsp_refresh[1], lsp_refresh_l2, area,
isis_jitter (ref_time, MAX_AGE_JITTER));
return ISIS_OK;
}
/*
* Something has changed -> regenerate LSP
*/
static int
lsp_l1_regenerate (struct thread *thread)
{
struct isis_area *area;
area = THREAD_ARG (thread);
area->lsp_regenerate_pending[0] = 0;
return lsp_non_pseudo_regenerate (area, 1);
}
static int
lsp_l2_regenerate (struct thread *thread)
{
struct isis_area *area;
area = THREAD_ARG (thread);
area->lsp_regenerate_pending[1] = 0;
return lsp_non_pseudo_regenerate (area, 2);
}
int
lsp_regenerate_schedule (struct isis_area *area)
{
struct isis_lsp *lsp;
u_char id[ISIS_SYS_ID_LEN + 2];
time_t now, diff;
memcpy (id, isis->sysid, ISIS_SYS_ID_LEN);
LSP_PSEUDO_ID (id) = LSP_FRAGMENT (id) = 0;
now = time (NULL);
/*
* First level 1
*/
if (area->is_type & IS_LEVEL_1)
{
lsp = lsp_search (id, area->lspdb[0]);
if (!lsp || area->lsp_regenerate_pending[0])
goto L2;
/*
* Throttle avoidance
*/
diff = now - lsp->last_generated;
if (diff < MIN_LSP_GEN_INTERVAL)
{
area->lsp_regenerate_pending[0] = 1;
area->t_lsp_l1_regenerate=thread_add_timer (master, lsp_l1_regenerate, area,
MIN_LSP_GEN_INTERVAL - diff);
goto L2;
}
else
lsp_non_pseudo_regenerate (area, 1);
}
/*
* then 2
*/
L2:
if (area->is_type & IS_LEVEL_2)
{
lsp = lsp_search (id, area->lspdb[1]);
if (!lsp || area->lsp_regenerate_pending[1])
return ISIS_OK;
/*
* Throttle avoidance
*/
diff = now - lsp->last_generated;
if (diff < MIN_LSP_GEN_INTERVAL)
{
area->lsp_regenerate_pending[1] = 1;
area->t_lsp_l2_regenerate=thread_add_timer (master, lsp_l2_regenerate, area,
MIN_LSP_GEN_INTERVAL - diff);
return ISIS_OK;
}
else
lsp_non_pseudo_regenerate (area, 2);
}
return ISIS_OK;
}
/*
* Funcs for pseudonode LSPs
*/
/*
* 7.3.8 and 7.3.10 Generation of level 1 and 2 pseudonode LSPs
*/
static void
lsp_build_pseudo (struct isis_lsp *lsp, struct isis_circuit *circuit,
int level)
{
struct isis_adjacency *adj;
struct is_neigh *is_neigh;
struct te_is_neigh *te_is_neigh;
struct es_neigh *es_neigh;
struct list *adj_list;
struct listnode *node;
struct isis_passwd *passwd;
assert (circuit);
assert (circuit->circ_type == CIRCUIT_T_BROADCAST);
if (!circuit->u.bc.is_dr[level - 1])
return; /* we are not DIS on this circuit */
lsp->level = level;
if (level == 1)
lsp->lsp_header->lsp_bits |= IS_LEVEL_1;
else
lsp->lsp_header->lsp_bits |= IS_LEVEL_2;
/*
* add self to IS neighbours
*/
if (circuit->area->oldmetric)
{
if (lsp->tlv_data.is_neighs == NULL)
{
lsp->tlv_data.is_neighs = list_new ();
lsp->tlv_data.is_neighs->del = free_tlv;
}
is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh));
memcpy (&is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN);
listnode_add (lsp->tlv_data.is_neighs, is_neigh);
}
if (circuit->area->newmetric)
{
if (lsp->tlv_data.te_is_neighs == NULL)
{
lsp->tlv_data.te_is_neighs = list_new ();
lsp->tlv_data.te_is_neighs->del = free_tlv;
}
te_is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct te_is_neigh));
memcpy (&te_is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN);
listnode_add (lsp->tlv_data.te_is_neighs, te_is_neigh);
}
adj_list = list_new ();
isis_adj_build_up_list (circuit->u.bc.adjdb[level - 1], adj_list);
for (ALL_LIST_ELEMENTS_RO (adj_list, node, adj))
{
if (adj->circuit_t & level)
{
if ((level == 1 && adj->sys_type == ISIS_SYSTYPE_L1_IS) ||
(level == 1 && adj->sys_type == ISIS_SYSTYPE_L2_IS &&
adj->adj_usage == ISIS_ADJ_LEVEL1AND2) ||
(level == 2 && adj->sys_type == ISIS_SYSTYPE_L2_IS))
{
/* an IS neighbour -> add it */
if (circuit->area->oldmetric)
{
is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh));
memcpy (&is_neigh->neigh_id, adj->sysid, ISIS_SYS_ID_LEN);
listnode_add (lsp->tlv_data.is_neighs, is_neigh);
}
if (circuit->area->newmetric)
{
te_is_neigh = XCALLOC (MTYPE_ISIS_TLV,
sizeof (struct te_is_neigh));
memcpy (&te_is_neigh->neigh_id, adj->sysid, ISIS_SYS_ID_LEN);
listnode_add (lsp->tlv_data.te_is_neighs, te_is_neigh);
}
}
else if (level == 1 && adj->sys_type == ISIS_SYSTYPE_ES)
{
/* an ES neigbour add it, if we are building level 1 LSP */
/* FIXME: the tlv-format is hard to use here */
if (lsp->tlv_data.es_neighs == NULL)
{
lsp->tlv_data.es_neighs = list_new ();
lsp->tlv_data.es_neighs->del = free_tlv;
}
es_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct es_neigh));
memcpy (&es_neigh->first_es_neigh, adj->sysid, ISIS_SYS_ID_LEN);
listnode_add (lsp->tlv_data.es_neighs, es_neigh);
}
}
}
/* Reset endp of stream to overwrite only TLV part of it. */
stream_reset (lsp->pdu);
stream_forward_endp (lsp->pdu, ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
/*
* Add the authentication info if it's present
*/
(level == 1) ? (passwd = &circuit->area->area_passwd) :
(passwd = &circuit->area->domain_passwd);
if (passwd->type)
{
memcpy (&lsp->tlv_data.auth_info, passwd, sizeof (struct isis_passwd));
tlv_add_authinfo (passwd->type, passwd->len, passwd->passwd, lsp->pdu);
}
if (lsp->tlv_data.is_neighs && listcount (lsp->tlv_data.is_neighs) > 0)
tlv_add_is_neighs (lsp->tlv_data.is_neighs, lsp->pdu);
if (lsp->tlv_data.te_is_neighs && listcount (lsp->tlv_data.te_is_neighs) > 0)
tlv_add_te_is_neighs (lsp->tlv_data.te_is_neighs, lsp->pdu);
if (lsp->tlv_data.es_neighs && listcount (lsp->tlv_data.es_neighs) > 0)
tlv_add_is_neighs (lsp->tlv_data.es_neighs, lsp->pdu);
lsp->lsp_header->pdu_len = htons (stream_get_endp (lsp->pdu));
fletcher_checksum (STREAM_DATA (lsp->pdu) + 12,
ntohs (lsp->lsp_header->pdu_len) - 12, 12);
list_delete (adj_list);
return;
}
static int
lsp_pseudo_regenerate (struct isis_circuit *circuit, int level)
{
dict_t *lspdb = circuit->area->lspdb[level - 1];
struct isis_lsp *lsp;
u_char lsp_id[ISIS_SYS_ID_LEN + 2];
memcpy (lsp_id, isis->sysid, ISIS_SYS_ID_LEN);
LSP_PSEUDO_ID (lsp_id) = circuit->circuit_id;
LSP_FRAGMENT (lsp_id) = 0;
lsp = lsp_search (lsp_id, lspdb);
if (!lsp)
{
zlog_err ("lsp_pseudo_regenerate(): no l%d LSP %s found!", level,
rawlspid_print (lsp_id));
return ISIS_ERROR;
}
lsp_clear_data (lsp);
lsp_build_pseudo (lsp, circuit, level);
lsp->lsp_header->rem_lifetime =
htons (isis_jitter (circuit->area->max_lsp_lifetime[level - 1],
MAX_AGE_JITTER));
lsp_inc_seqnum (lsp, 0);
if (isis->debugs & DEBUG_UPDATE_PACKETS)
{
zlog_debug ("ISIS-Upd (%s): refreshing pseudo LSP L%d %s",
circuit->area->area_tag, level,
rawlspid_print (lsp->lsp_header->lsp_id));
}
lsp->last_generated = time (NULL);
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
return ISIS_OK;
}
int
lsp_l1_refresh_pseudo (struct thread *thread)
{
struct isis_circuit *circuit;
int retval;
unsigned long ref_time;
circuit = THREAD_ARG (thread);
if (!circuit->u.bc.is_dr[0])
return ISIS_ERROR; /* FIXME: purge and such */
circuit->u.bc.t_refresh_pseudo_lsp[0] = NULL;
retval = lsp_pseudo_regenerate (circuit, 1);
ref_time = circuit->area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[0];
THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[0],
lsp_l1_refresh_pseudo, circuit,
isis_jitter (ref_time, MAX_AGE_JITTER));
return retval;
}
int
lsp_l1_pseudo_generate (struct isis_circuit *circuit)
{
struct isis_lsp *lsp;
u_char id[ISIS_SYS_ID_LEN + 2];
unsigned long ref_time;
memcpy (id, isis->sysid, ISIS_SYS_ID_LEN);
LSP_FRAGMENT (id) = 0;
LSP_PSEUDO_ID (id) = circuit->circuit_id;
/*
* If for some reason have a pseudo LSP in the db already -> regenerate
*/
if (lsp_search (id, circuit->area->lspdb[0]))
return lsp_pseudo_regenerate (circuit, 1);
lsp = lsp_new (id, circuit->area->max_lsp_lifetime[0],
1, circuit->area->is_type, 0, 1);
lsp_build_pseudo (lsp, circuit, 1);
lsp->own_lsp = 1;
lsp_insert (lsp, circuit->area->lspdb[0]);
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
ref_time = circuit->area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[0];
THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[0],
lsp_l1_refresh_pseudo, circuit,
isis_jitter (ref_time, MAX_AGE_JITTER));
return lsp_regenerate_schedule (circuit->area);
}
int
lsp_l2_refresh_pseudo (struct thread *thread)
{
struct isis_circuit *circuit;
int retval;
unsigned long ref_time;
circuit = THREAD_ARG (thread);
if (!circuit->u.bc.is_dr[1])
return ISIS_ERROR; /* FIXME: purge and such */
circuit->u.bc.t_refresh_pseudo_lsp[1] = NULL;
retval = lsp_pseudo_regenerate (circuit, 2);
ref_time = circuit->area->lsp_refresh[1] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[1];
THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[1],
lsp_l2_refresh_pseudo, circuit,
isis_jitter (ref_time, MAX_AGE_JITTER));
return retval;
}
int
lsp_l2_pseudo_generate (struct isis_circuit *circuit)
{
struct isis_lsp *lsp;
u_char id[ISIS_SYS_ID_LEN + 2];
unsigned long ref_time;
memcpy (id, isis->sysid, ISIS_SYS_ID_LEN);
LSP_FRAGMENT (id) = 0;
LSP_PSEUDO_ID (id) = circuit->circuit_id;
if (lsp_search (id, circuit->area->lspdb[1]))
return lsp_pseudo_regenerate (circuit, 2);
lsp = lsp_new (id, circuit->area->max_lsp_lifetime[1],
1, circuit->area->is_type, 0, 2);
lsp_build_pseudo (lsp, circuit, 2);
ref_time = circuit->area->lsp_refresh[1] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : circuit->area->lsp_refresh[1];
lsp->own_lsp = 1;
lsp_insert (lsp, circuit->area->lspdb[1]);
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
THREAD_TIMER_ON (master, circuit->u.bc.t_refresh_pseudo_lsp[1],
lsp_l2_refresh_pseudo, circuit,
isis_jitter (ref_time, MAX_AGE_JITTER));
return lsp_regenerate_schedule (circuit->area);
}
/*
* Walk through LSPs for an area
* - set remaining lifetime
* - set LSPs with SRMflag set for sending
*/
int
lsp_tick (struct thread *thread)
{
struct isis_area *area;
struct isis_circuit *circuit;
struct isis_lsp *lsp;
struct list *lsp_list;
struct listnode *lspnode, *cnode;
dnode_t *dnode, *dnode_next;
int level;
lsp_list = list_new ();
area = THREAD_ARG (thread);
assert (area);
area->t_tick = NULL;
THREAD_TIMER_ON (master, area->t_tick, lsp_tick, area, 1);
/*
* Build a list of LSPs with (any) SRMflag set
* and removed the ones that have aged out
*/
for (level = 0; level < ISIS_LEVELS; level++)
{
if (area->lspdb[level] && dict_count (area->lspdb[level]) > 0)
{
dnode = dict_first (area->lspdb[level]);
while (dnode != NULL)
{
dnode_next = dict_next (area->lspdb[level], dnode);
lsp = dnode_get (dnode);
lsp_set_time (lsp);
if (lsp->age_out == 0)
{
zlog_debug ("ISIS-Upd (%s): L%u LSP %s seq 0x%08x aged out",
area->area_tag,
lsp->level,
rawlspid_print (lsp->lsp_header->lsp_id),
ntohl (lsp->lsp_header->seq_num));
#ifdef TOPOLOGY_GENERATE
if (lsp->from_topology)
THREAD_TIMER_OFF (lsp->t_lsp_top_ref);
#endif /* TOPOLOGY_GENERATE */
lsp_destroy (lsp);
dict_delete (area->lspdb[level], dnode);
}
else if (flags_any_set (lsp->SRMflags))
listnode_add (lsp_list, lsp);
dnode = dnode_next;
}
/*
* Send LSPs on circuits indicated by the SRMflags
*/
if (listcount (lsp_list) > 0)
{
for (ALL_LIST_ELEMENTS_RO (area->circuit_list, cnode, circuit))
{
for (ALL_LIST_ELEMENTS_RO (lsp_list, lspnode, lsp))
{
if (ISIS_CHECK_FLAG (lsp->SRMflags, circuit))
{
/* FIXME: if same or elder lsp is already in lsp
* queue */
listnode_add (circuit->lsp_queue, lsp);
thread_add_event (master, send_lsp, circuit, 0);
}
}
}
}
list_delete_all_node (lsp_list);
}
}
list_delete (lsp_list);
return ISIS_OK;
}
void
lsp_purge_dr (u_char * id, struct isis_circuit *circuit, int level)
{
struct isis_lsp *lsp;
lsp = lsp_search (id, circuit->area->lspdb[level - 1]);
if (lsp && lsp->purged == 0)
{
lsp->lsp_header->rem_lifetime = htons (0);
lsp->lsp_header->pdu_len =
htons (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
lsp->purged = 0;
fletcher_checksum (STREAM_DATA (lsp->pdu) + 12,
ntohs (lsp->lsp_header->pdu_len) - 12, 12);
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
}
return;
}
/*
* Purge own LSP that is received and we don't have.
* -> Do as in 7.3.16.4
*/
void
lsp_purge_non_exist (struct isis_link_state_hdr *lsp_hdr,
struct isis_area *area)
{
struct isis_lsp *lsp;
/*
* We need to create the LSP to be purged
*/
zlog_debug ("LSP PURGE NON EXIST");
lsp = XCALLOC (MTYPE_ISIS_LSP, sizeof (struct isis_lsp));
/*FIXME: BUG BUG BUG! the lsp doesn't exist here! */
/*did smt here, maybe good probably not */
lsp->level = ((lsp_hdr->lsp_bits & LSPBIT_IST) == IS_LEVEL_1) ? 1 : 2;
lsp->pdu = stream_new (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
lsp->isis_header = (struct isis_fixed_hdr *) STREAM_DATA (lsp->pdu);
fill_fixed_hdr (lsp->isis_header, (lsp->level == 1) ? L1_LINK_STATE
: L2_LINK_STATE);
lsp->lsp_header = (struct isis_link_state_hdr *) (STREAM_DATA (lsp->pdu) +
ISIS_FIXED_HDR_LEN);
memcpy (lsp->lsp_header, lsp_hdr, ISIS_LSP_HDR_LEN);
/*
* Retain only LSP header
*/
lsp->lsp_header->pdu_len = htons (ISIS_FIXED_HDR_LEN + ISIS_LSP_HDR_LEN);
/*
* Set the remaining lifetime to 0
*/
lsp->lsp_header->rem_lifetime = 0;
/*
* Put the lsp into LSPdb
*/
lsp_insert (lsp, area->lspdb[lsp->level - 1]);
/*
* Send in to whole area
*/
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
return;
}
#ifdef TOPOLOGY_GENERATE
static int
top_lsp_refresh (struct thread *thread)
{
struct isis_lsp *lsp;
unsigned long ref_time;
lsp = THREAD_ARG (thread);
assert (lsp);
lsp->t_lsp_top_ref = NULL;
lsp_seqnum_update (lsp);
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
if (isis->debugs & DEBUG_UPDATE_PACKETS)
{
zlog_debug ("ISIS-Upd (): refreshing Topology L1 %s",
rawlspid_print (lsp->lsp_header->lsp_id));
}
/* Refresh dynamic hostname in the cache. */
isis_dynhn_insert (lsp->lsp_header->lsp_id, lsp->tlv_data.hostname,
IS_LEVEL_1);
lsp->lsp_header->rem_lifetime =
htons (isis_jitter (lsp->area->max_lsp_lifetime[0], MAX_AGE_JITTER));
ref_time = lsp->area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : lsp->area->lsp_refresh[0];
THREAD_TIMER_ON (master, lsp->t_lsp_top_ref, top_lsp_refresh, lsp,
isis_jitter (ref_time, MAX_LSP_GEN_JITTER));
return ISIS_OK;
}
void
generate_topology_lsps (struct isis_area *area)
{
struct listnode *node;
int i, max = 0;
struct arc *arc;
u_char lspid[ISIS_SYS_ID_LEN + 2];
struct isis_lsp *lsp;
unsigned long ref_time;
/* first we find the maximal node */
for (ALL_LIST_ELEMENTS_RO (area->topology, node, arc))
{
if (arc->from_node > max)
max = arc->from_node;
if (arc->to_node > max)
max = arc->to_node;
}
for (i = 1; i < (max + 1); i++)
{
memcpy (lspid, area->topology_baseis, ISIS_SYS_ID_LEN);
LSP_PSEUDO_ID (lspid) = 0x00;
LSP_FRAGMENT (lspid) = 0x00;
lspid[ISIS_SYS_ID_LEN - 1] = (i & 0xFF);
lspid[ISIS_SYS_ID_LEN - 2] = ((i >> 8) & 0xFF);
lsp = lsp_new (lspid, isis_jitter (area->max_lsp_lifetime[0],
MAX_AGE_JITTER), 1, IS_LEVEL_1, 0, 1);
if (!lsp)
return;
lsp->from_topology = 1;
lsp->area = area;
/* Creating LSP data based on topology info. */
build_topology_lsp_data (lsp, area, i);
/* Checksum is also calculated here. */
lsp_seqnum_update (lsp);
/* Take care of inserting dynamic hostname into cache. */
isis_dynhn_insert (lspid, lsp->tlv_data.hostname, IS_LEVEL_1);
ref_time = area->lsp_refresh[0] > MAX_LSP_GEN_INTERVAL ?
MAX_LSP_GEN_INTERVAL : area->lsp_refresh[0];
THREAD_TIMER_ON (master, lsp->t_lsp_top_ref, top_lsp_refresh, lsp,
isis_jitter (ref_time, MAX_LSP_GEN_JITTER));
ISIS_FLAGS_SET_ALL (lsp->SRMflags);
lsp_insert (lsp, area->lspdb[0]);
}
}
void
remove_topology_lsps (struct isis_area *area)
{
struct isis_lsp *lsp;
dnode_t *dnode, *dnode_next;
dnode = dict_first (area->lspdb[0]);
while (dnode != NULL)
{
dnode_next = dict_next (area->lspdb[0], dnode);
lsp = dnode_get (dnode);
if (lsp->from_topology)
{
THREAD_TIMER_OFF (lsp->t_lsp_top_ref);
lsp_destroy (lsp);
dict_delete (area->lspdb[0], dnode);
}
dnode = dnode_next;
}
}
void
build_topology_lsp_data (struct isis_lsp *lsp, struct isis_area *area,
int lsp_top_num)
{
struct listnode *node;
struct arc *arc;
struct is_neigh *is_neigh;
struct te_is_neigh *te_is_neigh;
char buff[200];
struct tlvs tlv_data;
struct isis_lsp *lsp0 = lsp;
/* Add area addresses. FIXME: Is it needed at all? */
if (lsp->tlv_data.area_addrs == NULL)
lsp->tlv_data.area_addrs = list_new ();
list_add_list (lsp->tlv_data.area_addrs, area->area_addrs);
if (lsp->tlv_data.nlpids == NULL)
lsp->tlv_data.nlpids = XMALLOC (MTYPE_ISIS_TLV, sizeof (struct nlpids));
lsp->tlv_data.nlpids->count = 1;
lsp->tlv_data.nlpids->nlpids[0] = NLPID_IP;
if (area->dynhostname)
{
lsp->tlv_data.hostname = XMALLOC (MTYPE_ISIS_TLV,
sizeof (struct hostname));
memset (buff, 0x00, 200);
sprintf (buff, "%s%d", area->topology_basedynh ? area->topology_basedynh :
"feedme", lsp_top_num);
memcpy (lsp->tlv_data.hostname->name, buff, strlen (buff));
lsp->tlv_data.hostname->namelen = strlen (buff);
}
if (lsp->tlv_data.nlpids)
tlv_add_nlpid (lsp->tlv_data.nlpids, lsp->pdu);
if (lsp->tlv_data.hostname)
tlv_add_dynamic_hostname (lsp->tlv_data.hostname, lsp->pdu);
if (lsp->tlv_data.area_addrs && listcount (lsp->tlv_data.area_addrs) > 0)
tlv_add_area_addrs (lsp->tlv_data.area_addrs, lsp->pdu);
memset (&tlv_data, 0, sizeof (struct tlvs));
if (tlv_data.is_neighs == NULL)
{
tlv_data.is_neighs = list_new ();
tlv_data.is_neighs->del = free_tlv;
}
/* Add reachability for this IS for simulated 1. */
if (lsp_top_num == 1)
{
is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh));
memcpy (&is_neigh->neigh_id, isis->sysid, ISIS_SYS_ID_LEN);
LSP_PSEUDO_ID (is_neigh->neigh_id) = 0x00;
/* Metric MUST NOT be 0, unless it's not alias TLV. */
is_neigh->metrics.metric_default = 0x01;
is_neigh->metrics.metric_delay = METRICS_UNSUPPORTED;
is_neigh->metrics.metric_expense = METRICS_UNSUPPORTED;
is_neigh->metrics.metric_error = METRICS_UNSUPPORTED;
listnode_add (tlv_data.is_neighs, is_neigh);
}
/* Add IS reachabilities. */
for (ALL_LIST_ELEMENTS_RO (area->topology, node, arc))
{
int to_lsp = 0;
if ((lsp_top_num != arc->from_node) && (lsp_top_num != arc->to_node))
continue;
if (lsp_top_num == arc->from_node)
to_lsp = arc->to_node;
else
to_lsp = arc->from_node;
if (area->oldmetric)
{
is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct is_neigh));
memcpy (&is_neigh->neigh_id, area->topology_baseis, ISIS_SYS_ID_LEN);
is_neigh->neigh_id[ISIS_SYS_ID_LEN - 1] = (to_lsp & 0xFF);
is_neigh->neigh_id[ISIS_SYS_ID_LEN - 2] = ((to_lsp >> 8) & 0xFF);
is_neigh->metrics.metric_default = arc->distance;
is_neigh->metrics.metric_delay = METRICS_UNSUPPORTED;
is_neigh->metrics.metric_expense = METRICS_UNSUPPORTED;
is_neigh->metrics.metric_error = METRICS_UNSUPPORTED;
listnode_add (tlv_data.is_neighs, is_neigh);
}
if (area->newmetric)
{
uint32_t metric;
if (tlv_data.te_is_neighs == NULL)
{
tlv_data.te_is_neighs = list_new ();
tlv_data.te_is_neighs->del = free_tlv;
}
te_is_neigh = XCALLOC (MTYPE_ISIS_TLV, sizeof (struct te_is_neigh));
memcpy (&te_is_neigh->neigh_id, area->topology_baseis,
ISIS_SYS_ID_LEN);
te_is_neigh->neigh_id[ISIS_SYS_ID_LEN - 1] = (to_lsp & 0xFF);
te_is_neigh->neigh_id[ISIS_SYS_ID_LEN - 2] = ((to_lsp >> 8) & 0xFF);
metric = ((htonl(arc->distance) >> 8) & 0xffffff);
memcpy (te_is_neigh->te_metric, &metric, 3);
listnode_add (tlv_data.te_is_neighs, te_is_neigh);
}
}
while (tlv_data.is_neighs && listcount (tlv_data.is_neighs))
{
if (lsp->tlv_data.is_neighs == NULL)
lsp->tlv_data.is_neighs = list_new ();
lsp_tlv_fit (lsp, &tlv_data.is_neighs, &lsp->tlv_data.is_neighs,
IS_NEIGHBOURS_LEN, area->lsp_frag_threshold,
tlv_add_is_neighs);
if (tlv_data.is_neighs && listcount (tlv_data.is_neighs))
lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1,
lsp0, area, IS_LEVEL_1);
}
while (tlv_data.te_is_neighs && listcount (tlv_data.te_is_neighs))
{
if (lsp->tlv_data.te_is_neighs == NULL)
lsp->tlv_data.te_is_neighs = list_new ();
lsp_tlv_fit (lsp, &tlv_data.te_is_neighs, &lsp->tlv_data.te_is_neighs,
IS_NEIGHBOURS_LEN, area->lsp_frag_threshold,
tlv_add_te_is_neighs);
if (tlv_data.te_is_neighs && listcount (tlv_data.te_is_neighs))
lsp = lsp_next_frag (LSP_FRAGMENT (lsp->lsp_header->lsp_id) + 1,
lsp0, area, IS_LEVEL_1);
}
free_tlvs (&tlv_data);
return;
}
#endif /* TOPOLOGY_GENERATE */
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