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isisd: couple of bug fixes

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This commit is contained in:
Subbaiah Venkata 2012-03-27 23:48:05 -07:00 committed by Avneesh Sachdev
parent 3f045a0881
commit e38e0df01a
13 changed files with 349 additions and 216 deletions
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7
isisd/AUTHORS
View File

@ -1,3 +1,4 @@
Sampo Saaristo <sambo@cs.tut.fi>
Ofer Wald <ofersf@islands.co.il>
Hannes Gredler <hannes@gredler.at>
Sampo Saaristo <sambo@cs.tut.fi>
Ofer Wald <ofersf@islands.co.il>
Hannes Gredler <hannes@gredler.at>
Subbaiah Venkata <svenkata@google.com>

98
isisd/isis_adjacency.c
View File

@ -220,29 +220,33 @@ isis_adj_state_change (struct isis_adjacency *adj, enum isis_adj_state new_state
if ((adj->level & level) == 0)
continue;
if (new_state == ISIS_ADJ_UP)
{
circuit->upadjcount[level - 1]++;
isis_event_adjacency_state_change (adj, new_state);
/* update counter & timers for debugging purposes */
adj->last_flap = time (NULL);
adj->flaps++;
}
{
circuit->upadjcount[level - 1]++;
isis_event_adjacency_state_change (adj, new_state);
/* update counter & timers for debugging purposes */
adj->last_flap = time (NULL);
adj->flaps++;
}
else if (new_state == ISIS_ADJ_DOWN)
{
listnode_delete (circuit->u.bc.adjdb[level - 1], adj);
circuit->upadjcount[level - 1]--;
if (circuit->upadjcount[level - 1] == 0)
{
/* Clean lsp_queue when no adj is up. */
if (circuit->lsp_queue)
list_delete_all_node (circuit->lsp_queue);
}
isis_event_adjacency_state_change (adj, new_state);
isis_delete_adj (adj);
}
list_delete_all_node (circuit->u.bc.lan_neighs[level - 1]);
isis_adj_build_neigh_list (circuit->u.bc.adjdb[level - 1],
circuit->u.bc.lan_neighs[level - 1]);
{
listnode_delete (circuit->u.bc.adjdb[level - 1], adj);
circuit->upadjcount[level - 1]--;
if (circuit->upadjcount[level - 1] == 0)
{
/* Clean lsp_queue when no adj is up. */
if (circuit->lsp_queue)
list_delete_all_node (circuit->lsp_queue);
}
isis_event_adjacency_state_change (adj, new_state);
isis_delete_adj (adj);
}
if (circuit->u.bc.lan_neighs[level - 1])
{
list_delete_all_node (circuit->u.bc.lan_neighs[level - 1]);
isis_adj_build_neigh_list (circuit->u.bc.adjdb[level - 1],
circuit->u.bc.lan_neighs[level - 1]);
}
/* On adjacency state change send new pseudo LSP if we are the DR */
if (circuit->u.bc.is_dr[level - 1])
@ -256,35 +260,35 @@ isis_adj_state_change (struct isis_adjacency *adj, enum isis_adj_state new_state
if ((adj->level & level) == 0)
continue;
if (new_state == ISIS_ADJ_UP)
{
circuit->upadjcount[level - 1]++;
isis_event_adjacency_state_change (adj, new_state);
{
circuit->upadjcount[level - 1]++;
isis_event_adjacency_state_change (adj, new_state);
if (adj->sys_type == ISIS_SYSTYPE_UNKNOWN)
send_hello (circuit, level);
if (adj->sys_type == ISIS_SYSTYPE_UNKNOWN)
send_hello (circuit, level);
/* update counter & timers for debugging purposes */
adj->last_flap = time (NULL);
adj->flaps++;
/* update counter & timers for debugging purposes */
adj->last_flap = time (NULL);
adj->flaps++;
/* 7.3.17 - going up on P2P -> send CSNP */
/* FIXME: yup, I know its wrong... but i will do it! (for now) */
send_csnp (circuit, level);
}
/* 7.3.17 - going up on P2P -> send CSNP */
/* FIXME: yup, I know its wrong... but i will do it! (for now) */
send_csnp (circuit, level);
}
else if (new_state == ISIS_ADJ_DOWN)
{
if (adj->circuit->u.p2p.neighbor == adj)
adj->circuit->u.p2p.neighbor = NULL;
circuit->upadjcount[level - 1]--;
if (circuit->upadjcount[level - 1] == 0)
{
/* Clean lsp_queue when no adj is up. */
if (circuit->lsp_queue)
list_delete_all_node (circuit->lsp_queue);
}
isis_event_adjacency_state_change (adj, new_state);
isis_delete_adj (adj);
}
{
if (adj->circuit->u.p2p.neighbor == adj)
adj->circuit->u.p2p.neighbor = NULL;
circuit->upadjcount[level - 1]--;
if (circuit->upadjcount[level - 1] == 0)
{
/* Clean lsp_queue when no adj is up. */
if (circuit->lsp_queue)
list_delete_all_node (circuit->lsp_queue);
}
isis_event_adjacency_state_change (adj, new_state);
isis_delete_adj (adj);
}
}
}

3
isisd/isis_adjacency.h
View File

@ -44,6 +44,7 @@ enum isis_system_type
enum isis_adj_state
{
ISIS_ADJ_UNKNOWN,
ISIS_ADJ_INITIALIZING,
ISIS_ADJ_UP,
ISIS_ADJ_DOWN
@ -83,8 +84,10 @@ struct isis_adjacency
struct list *area_addrs; /* areaAdressesOfNeighbour */
struct nlpids nlpids; /* protocols spoken ... */
struct list *ipv4_addrs;
struct in_addr router_address;
#ifdef HAVE_IPV6
struct list *ipv6_addrs;
struct in6_addr router_address6;
#endif /* HAVE_IPV6 */
u_char prio[ISIS_LEVELS]; /* priorityOfNeighbour for DIS */
int circuit_t; /* from hello PDU hdr */

10
isisd/isis_circuit.c
View File

@ -2720,6 +2720,15 @@ isis_if_new_hook (struct interface *ifp)
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;
}
@ -2734,6 +2743,7 @@ isis_circuit_init ()
/* Install interface node */
install_node (&interface_node, isis_interface_config_write);
install_element (CONFIG_NODE, &interface_cmd);
install_element (CONFIG_NODE, &no_interface_cmd);
install_default (INTERFACE_NODE);
install_element (INTERFACE_NODE, &interface_desc_cmd);

47
isisd/isis_events.c
View File

@ -130,20 +130,16 @@ isis_event_system_type_change (struct isis_area *area, int newtype)
{
case IS_LEVEL_1:
if (newtype == IS_LEVEL_2)
{
area_resign_level (area, IS_LEVEL_1);
}
else
{
if (area->lspdb[1] == NULL)
area->lspdb[1] = lsp_db_init ();
if (area->route_table[1] == NULL)
area->route_table[1] = route_table_init ();
if (area->lspdb[1] == NULL)
area->lspdb[1] = lsp_db_init ();
if (area->route_table[1] == NULL)
area->route_table[1] = route_table_init ();
#ifdef HAVE_IPV6
if (area->route_table6[1] == NULL)
area->route_table6[1] = route_table_init ();
if (area->route_table6[1] == NULL)
area->route_table6[1] = route_table_init ();
#endif /* HAVE_IPV6 */
}
break;
case IS_LEVEL_1_AND_2:
@ -155,21 +151,18 @@ isis_event_system_type_change (struct isis_area *area, int newtype)
case IS_LEVEL_2:
if (newtype == IS_LEVEL_1)
{
area_resign_level (area, IS_LEVEL_2);
}
else
{
if (area->lspdb[0] == NULL)
area->lspdb[0] = lsp_db_init ();
if (area->route_table[0] == NULL)
area->route_table[0] = route_table_init ();
if (area->lspdb[0] == NULL)
area->lspdb[0] = lsp_db_init ();
if (area->route_table[0] == NULL)
area->route_table[0] = route_table_init ();
#ifdef HAVE_IPV6
if (area->route_table6[0] == NULL)
area->route_table6[0] = route_table_init ();
if (area->route_table6[0] == NULL)
area->route_table6[0] = route_table_init ();
#endif /* HAVE_IPV6 */
}
break;
default:
break;
}
@ -199,8 +192,9 @@ circuit_commence_level (struct isis_circuit *circuit, int level)
{
if (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_passive)
THREAD_TIMER_ON (master, circuit->t_send_psnp[0], send_l1_psnp, circuit,
isis_jitter (circuit->psnp_interval[0], PSNP_JITTER));
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
{
@ -217,8 +211,9 @@ circuit_commence_level (struct isis_circuit *circuit, int level)
}
else
{
THREAD_TIMER_ON (master, circuit->t_send_psnp[1], send_l2_psnp, circuit,
isis_jitter (circuit->psnp_interval[1], PSNP_JITTER));
if (! circuit->is_passive)
THREAD_TIMER_ON (master, circuit->t_send_psnp[1], send_l2_psnp, circuit,
isis_jitter (circuit->psnp_interval[1], PSNP_JITTER));
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
{

42
isisd/isis_lsp.c
View File

@ -441,6 +441,19 @@ lsp_seqnum_update (struct isis_lsp *lsp0)
return;
}
static u_int8_t
lsp_bits_generate (int level, int overload_bit)
{
u_int8_t lsp_bits = 0;
if (level == IS_LEVEL_1)
lsp_bits = IS_LEVEL_1;
else
lsp_bits = IS_LEVEL_1_AND_2;
if (overload_bit)
lsp_bits |= overload_bit;
return lsp_bits;
}
static void
lsp_update_data (struct isis_lsp *lsp, struct stream *stream,
struct isis_area *area, int level)
@ -470,8 +483,6 @@ lsp_update_data (struct isis_lsp *lsp, struct stream *stream,
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;
@ -503,10 +514,9 @@ lsp_update_data (struct isis_lsp *lsp, struct stream *stream,
if ((found & TLVFLAG_DYN_HOSTNAME) && (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));
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 : IS_LEVEL_1);
}
return;
@ -1125,7 +1135,7 @@ lsp_next_frag (u_char frag_num, struct isis_lsp *lsp0, struct isis_area *area,
return lsp;
}
lsp = lsp_new (frag_id, ntohs(lsp0->lsp_header->rem_lifetime), 0,
area->is_type | area->overload_bit, 0, level);
lsp_bits_generate (level, area->overload_bit), 0, level);
lsp->area = area;
lsp->own_lsp = 1;
lsp_insert (lsp, area->lspdb[level - 1]);
@ -1644,7 +1654,7 @@ lsp_regenerate (struct isis_area *area, int level)
lsp_clear_data (lsp);
lsp_build (lsp, area);
lsp->lsp_header->lsp_bits = area->is_type | area->overload_bit;
lsp->lsp_header->lsp_bits = lsp_bits_generate (level, area->overload_bit);
rem_lifetime = lsp_rem_lifetime (area, level);
lsp->lsp_header->rem_lifetime = htons (rem_lifetime);
lsp_seqnum_update (lsp);
@ -1653,7 +1663,8 @@ lsp_regenerate (struct isis_area *area, int level)
lsp_set_all_srmflags (lsp);
for (ALL_LIST_ELEMENTS_RO (lsp->lspu.frags, node, frag))
{
frag->lsp_header->lsp_bits = area->is_type | area->overload_bit;
frag->lsp_header->lsp_bits = lsp_bits_generate (level,
area->overload_bit);
/* Set the lifetime values of all the fragments to the same value,
* so that no fragment expires before the lsp is refreshed.
*/
@ -1803,10 +1814,7 @@ lsp_build_pseudo (struct isis_lsp *lsp, struct isis_circuit *circuit,
lsp->level = level;
/* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
if (level == IS_LEVEL_1)
lsp->lsp_header->lsp_bits |= IS_LEVEL_1;
else
lsp->lsp_header->lsp_bits |= IS_LEVEL_2;
lsp->lsp_header->lsp_bits = lsp_bits_generate (level, 0);
/*
* add self to IS neighbours
@ -2002,7 +2010,7 @@ lsp_regenerate_pseudo (struct isis_circuit *circuit, int level)
lsp_build_pseudo (lsp, circuit, level);
/* RFC3787 section 4 SHOULD not set overload bit in pseudo LSPs */
lsp->lsp_header->lsp_bits = circuit->area->is_type;
lsp->lsp_header->lsp_bits = lsp_bits_generate (level, 0);
rem_lifetime = lsp_rem_lifetime (circuit->area, level);
lsp->lsp_header->rem_lifetime = htons (rem_lifetime);
lsp_inc_seqnum (lsp, 0);
@ -2321,7 +2329,8 @@ lsp_purge_non_exist (struct isis_link_state_hdr *lsp_hdr,
*/
lsp = XCALLOC (MTYPE_ISIS_LSP, sizeof (struct isis_lsp));
lsp->area = area;
lsp->level = ((lsp_hdr->lsp_bits & LSPBIT_IST) == IS_LEVEL_1) ? 1 : 2;
lsp->level = ((lsp_hdr->lsp_bits & LSPBIT_IST) == IS_LEVEL_1) ?
IS_LEVEL_1 : IS_LEVEL_2;
/* FIXME: Should be minimal mtu? */
lsp->pdu = stream_new (1500);
lsp->isis_header = (struct isis_fixed_hdr *) STREAM_DATA (lsp->pdu);
@ -2404,7 +2413,8 @@ top_lsp_refresh (struct thread *thread)
isis_dynhn_insert (lsp->lsp_header->lsp_id, lsp->tlv_data.hostname,
IS_LEVEL_1);
lsp->lsp_header->lsp_bits = lsp->area->is_type | lsp->area->overload_bit;
lsp->lsp_header->lsp_bits = lsp_bits_generate (level,
lsp->area->overload_bit);
rem_lifetime = lsp_rem_lifetime (lsp->area, IS_LEVEL_1);
lsp->lsp_header->rem_lifetime = htons (rem_lifetime);

138
isisd/isis_pdu.c
View File

@ -62,7 +62,7 @@
#endif /* PNBBY */
/* Utility mask array. */
static const u_char maskbit[] = {
static u_char maskbit[] = {
0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff
};
@ -225,16 +225,16 @@ lsp_authentication_check (struct stream *stream, struct isis_area *area,
{
struct isis_link_state_hdr *hdr;
uint32_t expected = 0, found = 0, auth_tlv_offset = 0;
uint16_t checksum, rem_lifetime;
uint16_t checksum, rem_lifetime, pdu_len;
struct tlvs tlvs;
int retval = ISIS_OK;
hdr = (struct isis_link_state_hdr *) (STREAM_PNT (stream));
pdu_len = ntohs (hdr->pdu_len);
expected |= TLVFLAG_AUTH_INFO;
auth_tlv_offset = stream_get_getp (stream) + ISIS_LSP_HDR_LEN;
retval = parse_tlvs (area->area_tag, STREAM_PNT (stream) + ISIS_LSP_HDR_LEN,
ntohs (hdr->pdu_len) - ISIS_FIXED_HDR_LEN -
ISIS_LSP_HDR_LEN,
pdu_len - ISIS_FIXED_HDR_LEN - ISIS_LSP_HDR_LEN,
&expected, &found, &tlvs, &auth_tlv_offset);
if (retval != ISIS_OK)
@ -243,7 +243,7 @@ lsp_authentication_check (struct stream *stream, struct isis_area *area,
"cksum 0x%04x, lifetime %us, len %u",
area->area_tag, level, rawlspid_print (hdr->lsp_id),
ntohl (hdr->seq_num), ntohs (hdr->checksum),
ntohs (hdr->rem_lifetime), ntohs (hdr->pdu_len));
ntohs (hdr->rem_lifetime), pdu_len);
if ((isis->debugs & DEBUG_UPDATE_PACKETS) &&
(isis->debugs & DEBUG_PACKET_DUMP))
zlog_dump_data (STREAM_DATA (stream), stream_get_endp (stream));
@ -397,6 +397,7 @@ process_p2p_hello (struct isis_circuit *circuit)
struct isis_p2p_hello_hdr *hdr;
struct isis_adjacency *adj;
u_int32_t expected = 0, found = 0, auth_tlv_offset = 0;
uint16_t pdu_len;
struct tlvs tlvs;
if (isis->debugs & DEBUG_ADJ_PACKETS)
@ -439,23 +440,26 @@ process_p2p_hello (struct isis_circuit *circuit)
* Get the header
*/
hdr = (struct isis_p2p_hello_hdr *) STREAM_PNT (circuit->rcv_stream);
stream_forward_getp (circuit->rcv_stream, ISIS_P2PHELLO_HDRLEN);
pdu_len = ntohs (hdr->pdu_len);
/* hdr.circuit_t = stream_getc (stream);
stream_get (hdr.source_id, stream, ISIS_SYS_ID_LEN);
hdr.hold_time = stream_getw (stream);
hdr.pdu_len = stream_getw (stream);
hdr.local_id = stream_getc (stream); */
if (ntohs (hdr->pdu_len) > ISO_MTU(circuit))
if (pdu_len > ISO_MTU(circuit) ||
pdu_len > stream_get_endp (circuit->rcv_stream))
{
zlog_warn ("ISIS-Adj (%s): Rcvd P2P IIH from (%s) with "
"invalid pdu length %d",
circuit->area->area_tag, circuit->interface->name,
ntohs (hdr->pdu_len));
circuit->area->area_tag, circuit->interface->name, pdu_len);
return ISIS_WARNING;
}
/*
* Set the stream endp to PDU length, ignoring additional padding
* introduced by transport chips.
*/
if (pdu_len < stream_get_endp (circuit->rcv_stream))
stream_set_endp (circuit->rcv_stream, pdu_len);
stream_forward_getp (circuit->rcv_stream, ISIS_P2PHELLO_HDRLEN);
/*
* Lets get the TLVS now
*/
@ -468,9 +472,8 @@ process_p2p_hello (struct isis_circuit *circuit)
auth_tlv_offset = stream_get_getp (circuit->rcv_stream);
retval = parse_tlvs (circuit->area->area_tag,
STREAM_PNT (circuit->rcv_stream),
ntohs (hdr->pdu_len) - ISIS_P2PHELLO_HDRLEN
- ISIS_FIXED_HDR_LEN, &expected, &found, &tlvs,
&auth_tlv_offset);
pdu_len - ISIS_P2PHELLO_HDRLEN - ISIS_FIXED_HDR_LEN,
&expected, &found, &tlvs, &auth_tlv_offset);
if (retval > ISIS_WARNING)
{
@ -821,7 +824,7 @@ process_p2p_hello (struct isis_circuit *circuit)
" cir id %02d, length %d",
circuit->area->area_tag, circuit->interface->name,
circuit_t2string (circuit->is_type),
circuit->circuit_id, ntohs (hdr->pdu_len));
circuit->circuit_id, pdu_len);
}
free_tlvs (&tlvs);
@ -906,15 +909,23 @@ process_lan_hello (int level, struct isis_circuit *circuit, u_char * ssnpa)
hdr.prio = stream_getc (circuit->rcv_stream);
stream_get (hdr.lan_id, circuit->rcv_stream, ISIS_SYS_ID_LEN + 1);
if (hdr.pdu_len > ISO_MTU(circuit))
if (hdr.pdu_len > ISO_MTU(circuit) ||
hdr.pdu_len > stream_get_endp (circuit->rcv_stream))
{
zlog_warn ("ISIS-Adj (%s): Rcvd LAN IIH from (%s) with "
"invalid pdu length %d",
circuit->area->area_tag, circuit->interface->name,
hdr.pdu_len);
hdr.pdu_len = stream_get_endp (circuit->rcv_stream);
return ISIS_WARNING;
}
/*
* Set the stream endp to PDU length, ignoring additional padding
* introduced by transport chips.
*/
if (hdr.pdu_len < stream_get_endp (circuit->rcv_stream))
stream_set_endp (circuit->rcv_stream, hdr.pdu_len);
if (hdr.circuit_t != IS_LEVEL_1 &&
hdr.circuit_t != IS_LEVEL_2 &&
hdr.circuit_t != IS_LEVEL_1_AND_2 &&
@ -1167,6 +1178,7 @@ process_lsp (int level, struct isis_circuit *circuit, u_char * ssnpa)
int retval = ISIS_OK, comp = 0;
u_char lspid[ISIS_SYS_ID_LEN + 2];
struct isis_passwd *passwd;
uint16_t pdu_len;
if (isis->debugs & DEBUG_UPDATE_PACKETS)
{
@ -1187,6 +1199,26 @@ process_lsp (int level, struct isis_circuit *circuit, u_char * ssnpa)
/* Reference the header */
hdr = (struct isis_link_state_hdr *) STREAM_PNT (circuit->rcv_stream);
pdu_len = ntohs (hdr->pdu_len);
/* lsp length check */
if (pdu_len < ISIS_LSP_HDR_LEN ||
pdu_len > ISO_MTU(circuit) ||
pdu_len > stream_get_endp (circuit->rcv_stream))
{
zlog_debug ("ISIS-Upd (%s): LSP %s invalid LSP length %d",
circuit->area->area_tag,
rawlspid_print (hdr->lsp_id), pdu_len);
return ISIS_WARNING;
}
/*
* Set the stream endp to PDU length, ignoring additional padding
* introduced by transport chips.
*/
if (pdu_len < stream_get_endp (circuit->rcv_stream))
stream_set_endp (circuit->rcv_stream, pdu_len);
if (isis->debugs & DEBUG_UPDATE_PACKETS)
{
@ -1198,24 +1230,25 @@ process_lsp (int level, struct isis_circuit *circuit, u_char * ssnpa)
ntohl (hdr->seq_num),
ntohs (hdr->checksum),
ntohs (hdr->rem_lifetime),
ntohs (hdr->pdu_len),
pdu_len,
circuit->interface->name);
}
if (ntohs (hdr->pdu_len) <= ISIS_LSP_HDR_LEN ||
ntohs (hdr->pdu_len) > ISO_MTU(circuit))
/* lsp is_type check */
if ((hdr->lsp_bits & IS_LEVEL_1_AND_2) != IS_LEVEL_1 &&
(hdr->lsp_bits & IS_LEVEL_1_AND_2) != IS_LEVEL_1_AND_2)
{
zlog_debug ("ISIS-Upd (%s): LSP %s invalid LSP length %d",
zlog_debug ("ISIS-Upd (%s): LSP %s invalid LSP is type %x",
circuit->area->area_tag,
rawlspid_print (hdr->lsp_id), ntohs (hdr->pdu_len));
return ISIS_WARNING;
rawlspid_print (hdr->lsp_id), hdr->lsp_bits);
/* continue as per RFC1122 Be liberal in what you accept, and
* conservative in what you send */
}
/* Checksum sanity check - FIXME: move to correct place */
/* 12 = sysid+pdu+remtime */
if (iso_csum_verify (STREAM_PNT (circuit->rcv_stream) + 4,
ntohs (hdr->pdu_len) - 12, &hdr->checksum))
pdu_len - 12, &hdr->checksum))
{
zlog_debug ("ISIS-Upd (%s): LSP %s invalid LSP checksum 0x%04x",
circuit->area->area_tag,
@ -1403,17 +1436,19 @@ dontcheckadj:
* has information that the current sequence number for source S is
* "greater" than that held by S, ... */
else if (ntohl (hdr->seq_num) > ntohl (lsp->lsp_header->seq_num))
if (ntohl (hdr->seq_num) > ntohl (lsp->lsp_header->seq_num))
{
/* 7.3.16.1 */
lsp_inc_seqnum (lsp, ntohl (hdr->seq_num));
lsp_set_all_srmflags (lsp);
if (isis->debugs & DEBUG_UPDATE_PACKETS)
zlog_debug ("ISIS-Upd (%s): (2) re-originating LSP %s new seq "
"0x%08x", circuit->area->area_tag,
rawlspid_print (hdr->lsp_id),
ntohl (lsp->lsp_header->seq_num));
}
/* If the received LSP is older or equal,
* resend the LSP which will act as ACK */
lsp_set_all_srmflags (lsp);
}
else
{
@ -1440,7 +1475,7 @@ dontcheckadj:
if (!lsp)
{
lsp = lsp_new_from_stream_ptr (circuit->rcv_stream,
ntohs (hdr->pdu_len), lsp0,
pdu_len, lsp0,
circuit->area, level);
lsp_insert (lsp, circuit->area->lspdb[level - 1]);
}
@ -1489,7 +1524,7 @@ process_snp (int snp_type, int level, struct isis_circuit *circuit,
int retval = ISIS_OK;
int cmp, own_lsp;
char typechar = ' ';
unsigned int len;
uint16_t pdu_len;
struct isis_adjacency *adj;
struct isis_complete_seqnum_hdr *chdr = NULL;
struct isis_partial_seqnum_hdr *phdr = NULL;
@ -1508,12 +1543,14 @@ process_snp (int snp_type, int level, struct isis_circuit *circuit,
typechar = 'C';
chdr =
(struct isis_complete_seqnum_hdr *) STREAM_PNT (circuit->rcv_stream);
circuit->rcv_stream->getp += ISIS_CSNP_HDRLEN;
len = ntohs (chdr->pdu_len);
if (len < ISIS_CSNP_HDRLEN || len > ISO_MTU(circuit))
stream_forward_getp (circuit->rcv_stream, ISIS_CSNP_HDRLEN);
pdu_len = ntohs (chdr->pdu_len);
if (pdu_len < ISIS_CSNP_HDRLEN ||
pdu_len > ISO_MTU(circuit) ||
pdu_len > stream_get_endp (circuit->rcv_stream))
{
zlog_warn ("Received a CSNP with bogus length %d", len);
return ISIS_OK;
zlog_warn ("Received a CSNP with bogus length %d", pdu_len);
return ISIS_WARNING;
}
}
else
@ -1521,15 +1558,24 @@ process_snp (int snp_type, int level, struct isis_circuit *circuit,
typechar = 'P';
phdr =
(struct isis_partial_seqnum_hdr *) STREAM_PNT (circuit->rcv_stream);
circuit->rcv_stream->getp += ISIS_PSNP_HDRLEN;
len = ntohs (phdr->pdu_len);
if (len < ISIS_PSNP_HDRLEN || len > ISO_MTU(circuit))
stream_forward_getp (circuit->rcv_stream, ISIS_PSNP_HDRLEN);
pdu_len = ntohs (phdr->pdu_len);
if (pdu_len < ISIS_PSNP_HDRLEN ||
pdu_len > ISO_MTU(circuit) ||
pdu_len > stream_get_endp (circuit->rcv_stream))
{
zlog_warn ("Received a CSNP with bogus length %d", len);
return ISIS_OK;
zlog_warn ("Received a CSNP with bogus length %d", pdu_len);
return ISIS_WARNING;
}
}
/*
* Set the stream endp to PDU length, ignoring additional padding
* introduced by transport chips.
*/
if (pdu_len < stream_get_endp (circuit->rcv_stream))
stream_set_endp (circuit->rcv_stream, pdu_len);
/* 7.3.15.2 a) 1 - external domain circuit will discard snp pdu */
if (circuit->ext_domain)
{
@ -1617,7 +1663,7 @@ process_snp (int snp_type, int level, struct isis_circuit *circuit,
auth_tlv_offset = stream_get_getp (circuit->rcv_stream);
retval = parse_tlvs (circuit->area->area_tag,
STREAM_PNT (circuit->rcv_stream),
len - circuit->rcv_stream->getp,
pdu_len - stream_get_getp (circuit->rcv_stream),
&expected, &found, &tlvs, &auth_tlv_offset);
if (retval > ISIS_WARNING)
@ -2585,6 +2631,7 @@ max_lsps_per_snp (int snp_type, int level, struct isis_circuit *circuit)
auth_tlv_len = auth_tlv_length (level, circuit);
lsp_count = get_max_lsp_count (
stream_get_size (circuit->snd_stream) - snp_hdr_len - auth_tlv_len);
return lsp_count;
}
/*
@ -2862,6 +2909,9 @@ send_psnp (int level, struct isis_circuit *circuit)
dict_count (circuit->area->lspdb[level - 1]) == 0)
return ISIS_OK;
if (! circuit->snd_stream)
return ISIS_ERROR;
num_lsps = max_lsps_per_snp (ISIS_SNP_PSNP_FLAG, level, circuit);
while (1)

6
isisd/isis_pdu.h
View File

@ -114,7 +114,7 @@ struct isis_fixed_hdr
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Holding Time | 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | PDU Lenght | 2
* | PDU Length | 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | R | Priority | 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
@ -142,7 +142,7 @@ struct isis_lan_hello_hdr
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Holding Time + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + PDU Lenght + 2
* + PDU Length + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Local Circuit ID | 1
* +-------+-------+-------+-------+-------+-------+-------+-------+
@ -202,7 +202,7 @@ struct isis_link_state_hdr
/*
* L1 and L2 IS to IS complete sequence numbers PDU header
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + PDU Lenght + 2
* + PDU Length + 2
* +-------+-------+-------+-------+-------+-------+-------+-------+
* + Source ID + id_len + 1
* +-------+-------+-------+-------+-------+-------+-------+-------+

18
isisd/isis_route.c
View File

@ -244,6 +244,7 @@ adjinfo2nexthop (struct list *nexthops, struct isis_adjacency *adj)
{
nh = isis_nexthop_create (ipv4_addr,
adj->circuit->interface->ifindex);
nh->router_address = adj->router_address;
listnode_add (nexthops, nh);
}
}
@ -267,6 +268,7 @@ adjinfo2nexthop6 (struct list *nexthops6, struct isis_adjacency *adj)
{
nh6 = isis_nexthop6_create (ipv6_addr,
adj->circuit->interface->ifindex);
nh6->router_address6 = adj->router_address6;
listnode_add (nexthops6, nh6);
}
}
@ -274,8 +276,8 @@ adjinfo2nexthop6 (struct list *nexthops6, struct isis_adjacency *adj)
#endif /* HAVE_IPV6 */
static struct isis_route_info *
isis_route_info_new (uint32_t cost, uint32_t depth, u_char family,
struct list *adjacencies)
isis_route_info_new (struct prefix *prefix, uint32_t cost, uint32_t depth,
struct list *adjacencies)
{
struct isis_route_info *rinfo;
struct isis_adjacency *adj;
@ -288,7 +290,7 @@ isis_route_info_new (uint32_t cost, uint32_t depth, u_char family,
return NULL;
}
if (family == AF_INET)
if (prefix->family == AF_INET)
{
rinfo->nexthops = list_new ();
for (ALL_LIST_ELEMENTS_RO (adjacencies, node, adj))
@ -296,11 +298,14 @@ isis_route_info_new (uint32_t cost, uint32_t depth, u_char family,
/* check for force resync this route */
if (CHECK_FLAG (adj->circuit->flags, ISIS_CIRCUIT_FLAPPED_AFTER_SPF))
SET_FLAG (rinfo->flag, ISIS_ROUTE_FLAG_ZEBRA_RESYNC);
/* update neighbor router address */
if (depth == 2 && prefix->prefixlen == 32)
adj->router_address = prefix->u.prefix4;
adjinfo2nexthop (rinfo->nexthops, adj);
}
}
#ifdef HAVE_IPV6
if (family == AF_INET6)
if (prefix->family == AF_INET6)
{
rinfo->nexthops6 = list_new ();
for (ALL_LIST_ELEMENTS_RO (adjacencies, node, adj))
@ -308,6 +313,9 @@ isis_route_info_new (uint32_t cost, uint32_t depth, u_char family,
/* check for force resync this route */
if (CHECK_FLAG (adj->circuit->flags, ISIS_CIRCUIT_FLAPPED_AFTER_SPF))
SET_FLAG (rinfo->flag, ISIS_ROUTE_FLAG_ZEBRA_RESYNC);
/* update neighbor router address */
if (depth == 2 && prefix->prefixlen == 128)
adj->router_address6 = prefix->u.prefix6;
adjinfo2nexthop6 (rinfo->nexthops6, adj);
}
}
@ -415,7 +423,7 @@ isis_route_create (struct prefix *prefix, u_int32_t cost, u_int32_t depth,
/* for debugs */
prefix2str (prefix, (char *) buff, BUFSIZ);
rinfo_new = isis_route_info_new (cost, depth, family, adjacencies);
rinfo_new = isis_route_info_new (prefix, cost, depth, adjacencies);
if (!rinfo_new)
{
zlog_err ("ISIS-Rte (%s): isis_route_create: out of memory!",

2
isisd/isis_route.h
View File

@ -30,6 +30,7 @@ struct isis_nexthop6
{
unsigned int ifindex;
struct in6_addr ip6;
struct in6_addr router_address6;
unsigned int lock;
};
#endif /* HAVE_IPV6 */
@ -38,6 +39,7 @@ struct isis_nexthop
{
unsigned int ifindex;
struct in_addr ip;
struct in_addr router_address;
unsigned int lock;
};

86
isisd/isis_spf.c
View File

@ -274,7 +274,8 @@ isis_spftree_new (struct isis_area *area)
tree->tents = list_new ();
tree->paths = list_new ();
tree->area = area;
tree->lastrun = 0;
tree->last_run_timestamp = 0;
tree->last_run_duration = 0;
tree->runcount = 0;
tree->pending = 0;
return tree;
@ -408,12 +409,16 @@ spftree_area_adj_del (struct isis_area *area, struct isis_adjacency *adj)
static struct isis_lsp *
isis_root_system_lsp (struct isis_area *area, int level, u_char *sysid)
{
struct isis_lsp *lsp;
u_char lspid[ISIS_SYS_ID_LEN + 2];
memcpy (lspid, sysid, ISIS_SYS_ID_LEN);
LSP_PSEUDO_ID (lspid) = 0;
LSP_FRAGMENT (lspid) = 0;
return (lsp_search (lspid, area->lspdb[level - 1]));
lsp = lsp_search (lspid, area->lspdb[level - 1]);
if (lsp && lsp->lsp_header->rem_lifetime != 0)
return lsp;
return NULL;
}
/*
@ -1021,7 +1026,7 @@ isis_spf_preload_tent (struct isis_spftree *spftree, int level,
LSP_PSEUDO_ID (lsp_id) = 0;
LSP_FRAGMENT (lsp_id) = 0;
lsp = lsp_search (lsp_id, spftree->area->lspdb[level - 1]);
if (!lsp)
if (lsp == NULL || lsp->lsp_header->rem_lifetime == 0)
zlog_warn ("ISIS-Spf: No LSP %s found for IS adjacency "
"L%d on %s (ID %u)",
rawlspid_print (lsp_id), level,
@ -1171,6 +1176,13 @@ isis_run_spf (struct isis_area *area, int level, int family, u_char *sysid)
u_char lsp_id[ISIS_SYS_ID_LEN + 2];
struct isis_lsp *lsp;
struct route_table *table = NULL;
struct timespec time_now;
unsigned long long start_time, end_time;
/* Get time that can't roll backwards. */
clock_gettime(CLOCK_MONOTONIC, &time_now);
start_time = time_now.tv_sec;
start_time = (start_time * 1000000) + (time_now.tv_nsec / 1000);
if (family == AF_INET)
spftree = area->spftree[level - 1];
@ -1237,7 +1249,7 @@ isis_run_spf (struct isis_area *area, int level, int family, u_char *sysid)
memcpy (lsp_id, vertex->N.id, ISIS_SYS_ID_LEN + 1);
LSP_FRAGMENT (lsp_id) = 0;
lsp = lsp_search (lsp_id, area->lspdb[level - 1]);
if (lsp)
if (lsp && lsp->lsp_header->rem_lifetime != 0)
{
if (LSP_PSEUDO_ID (lsp_id))
{
@ -1263,9 +1275,14 @@ isis_run_spf (struct isis_area *area, int level, int family, u_char *sysid)
out:
isis_route_validate (area);
spftree->lastrun = time (NULL);
spftree->runcount++;
spftree->pending = 0;
spftree->runcount++;
spftree->last_run_timestamp = time (NULL);
clock_gettime(CLOCK_MONOTONIC, &time_now);
end_time = time_now.tv_sec;
end_time = (end_time * 1000000) + (time_now.tv_nsec / 1000);
spftree->last_run_duration = end_time - start_time;
return retval;
}
@ -1332,7 +1349,7 @@ isis_spf_schedule (struct isis_area *area, int level)
{
struct isis_spftree *spftree = area->spftree[level - 1];
time_t now = time (NULL);
int diff = now - spftree->lastrun;
int diff = now - spftree->last_run_timestamp;
assert (diff >= 0);
assert (area->is_type & level);
@ -1346,20 +1363,20 @@ isis_spf_schedule (struct isis_area *area, int level)
THREAD_TIMER_OFF (spftree->t_spf);
/* wait MINIMUM_SPF_INTERVAL before doing the SPF */
if (diff >= MINIMUM_SPF_INTERVAL)
/* wait configured min_spf_interval before doing the SPF */
if (diff >= area->min_spf_interval[level-1])
return isis_run_spf (area, level, AF_INET, isis->sysid);
if (level == 1)
THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l1, area,
MINIMUM_SPF_INTERVAL - diff);
area->min_spf_interval[0] - diff);
else
THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf_l2, area,
MINIMUM_SPF_INTERVAL - diff);
area->min_spf_interval[1] - diff);
if (isis->debugs & DEBUG_SPF_EVENTS)
zlog_debug ("ISIS-Spf (%s) L%d SPF scheduled %d sec from now",
area->area_tag, level, MINIMUM_SPF_INTERVAL - diff);
area->area_tag, level, area->min_spf_interval[level-1] - diff);
spftree->pending = 1;
@ -1428,34 +1445,37 @@ isis_spf_schedule6 (struct isis_area *area, int level)
{
int retval = ISIS_OK;
struct isis_spftree *spftree = area->spftree6[level - 1];
time_t diff, now = time (NULL);
time_t now = time (NULL);
time_t diff = now - spftree->last_run_timestamp;
assert (diff >= 0);
assert (area->is_type & level);
if (isis->debugs & DEBUG_SPF_EVENTS)
zlog_debug ("ISIS-Spf (%s) L%d SPF schedule called, lastrun %d sec ago",
area->area_tag, level, diff);
if (spftree->pending)
return retval;
return ISIS_OK;
THREAD_TIMER_OFF (spftree->t_spf);
/* FIXME: let's wait MINIMUM_SPF_INTERVAL before doing the SPF */
if (now - isis->uptime < MINIMUM_SPF_INTERVAL || isis->uptime == 0)
diff = 0;
else
diff = now - spftree->lastrun;
/* wait configured min_spf_interval before doing the SPF */
if (diff >= area->min_spf_interval[level-1])
return isis_run_spf (area, level, AF_INET6, isis->sysid);
if (diff < MINIMUM_SPF_INTERVAL)
{
if (level == 1)
THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l1, area,
MINIMUM_SPF_INTERVAL - diff);
else
THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l2, area,
MINIMUM_SPF_INTERVAL - diff);
spftree->pending = 1;
}
if (level == 1)
THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l1, area,
area->min_spf_interval[0] - diff);
else
{
retval = isis_run_spf (area, level, AF_INET6, isis->sysid);
}
THREAD_TIMER_ON (master, spftree->t_spf, isis_run_spf6_l2, area,
area->min_spf_interval[1] - diff);
if (isis->debugs & DEBUG_SPF_EVENTS)
zlog_debug ("ISIS-Spf (%s) L%d SPF scheduled %d sec from now",
area->area_tag, level, area->min_spf_interval[level-1] - diff);
spftree->pending = 1;
return retval;
}

3
isisd/isis_spf.h
View File

@ -68,8 +68,9 @@ struct isis_spftree
struct list *tents; /* TENT */
struct isis_area *area; /* back pointer to area */
int pending; /* already scheduled */
time_t lastrun; /* for scheduling */
unsigned int runcount; /* number of runs since uptime */
time_t last_run_timestamp; /* last run timestamp for scheduling */
time_t last_run_duration; /* last run duration in msec */
};
struct isis_spftree * isis_spftree_new (struct isis_area *area);

105
isisd/isisd.c
View File

@ -720,7 +720,7 @@ DEFUN (clear_isis_neighbor,
DEFUN (clear_isis_neighbor_arg,
clear_isis_neighbor_arg_cmd,
"claer isis neighbor WORD",
"clear isis neighbor WORD",
CLEAR_STR
"ISIS network information\n"
"ISIS neighbor adjacencies\n"
@ -1273,10 +1273,13 @@ DEFUN (show_isis_summary,
vty_out (vty, " minimum interval : %d%s",
area->min_spf_interval[level - 1], VTY_NEWLINE);
vty_out (vty, " last run : ");
vty_out_timestr(vty, spftree->lastrun);
vty_out (vty, " last run elapsed : ");
vty_out_timestr(vty, spftree->last_run_timestamp);
vty_out (vty, "%s", VTY_NEWLINE);
vty_out (vty, " last run duration : %u usec%s",
(u_int32_t)spftree->last_run_duration, VTY_NEWLINE);
vty_out (vty, " run count : %d%s",
spftree->runcount, VTY_NEWLINE);
@ -1290,10 +1293,13 @@ DEFUN (show_isis_summary,
vty_out (vty, " minimum interval : %d%s",
area->min_spf_interval[level - 1], VTY_NEWLINE);
vty_out (vty, " last run : ");
vty_out_timestr(vty, spftree->lastrun);
vty_out (vty, " last run elapsed : ");
vty_out_timestr(vty, spftree->last_run_timestamp);
vty_out (vty, "%s", VTY_NEWLINE);
vty_out (vty, " last run duration : %u msec%s",
spftree->last_run_duration, VTY_NEWLINE);
vty_out (vty, " run count : %d%s",
spftree->runcount, VTY_NEWLINE);
#endif
@ -1329,7 +1335,7 @@ show_isis_database (struct vty *vty, const char *argv, int ui_level)
struct isis_dynhn *dynhn;
const char *pos = argv;
u_char lspid[ISIS_SYS_ID_LEN+2];
char sysid[15]; /* len of xxxx.xxxx.xxxx + place for #0 termination */
char sysid[255];
u_char number[3];
int level, lsp_count;
@ -1337,13 +1343,7 @@ show_isis_database (struct vty *vty, const char *argv, int ui_level)
return CMD_SUCCESS;
memset (&lspid, 0, ISIS_SYS_ID_LEN);
memset (&sysid, 0, 15);
if (argv)
{
strncpy (sysid, argv, 15);
sysid[14] = '\0';
}
memset (&sysid, 0, 255);
/*
* extract fragment and pseudo id from the string argv
@ -1354,6 +1354,8 @@ show_isis_database (struct vty *vty, const char *argv, int ui_level)
* Where systemid is in the form:
* xxxx.xxxx.xxxx
*/
if (argv)
strncpy (sysid, argv, 254);
if (argv && strlen (argv) > 3)
{
pos = argv + strlen (argv) - 3;
@ -2033,6 +2035,44 @@ ALIAS (no_lsp_gen_interval_l2,
"Set interval for level 2 only\n"
"Minimum interval in seconds\n")
static int
validate_metric_style_narrow (struct vty *vty, struct isis_area *area)
{
struct isis_circuit *circuit;
struct listnode *node;
if (! vty)
return CMD_ERR_AMBIGUOUS;
if (! area)
{
vty_out (vty, "ISIS area is invalid%s", VTY_NEWLINE);
return CMD_ERR_AMBIGUOUS;
}
for (ALL_LIST_ELEMENTS_RO (area->circuit_list, node, circuit))
{
if ((area->is_type & IS_LEVEL_1) &&
(circuit->is_type & IS_LEVEL_1) &&
(circuit->metrics[0].metric_default > MAX_NARROW_LINK_METRIC))
{
vty_out (vty, "ISIS circuit %s metric is invalid%s",
circuit->interface->name, VTY_NEWLINE);
return CMD_ERR_AMBIGUOUS;
}
if ((area->is_type & IS_LEVEL_2) &&
(circuit->is_type & IS_LEVEL_2) &&
(circuit->metrics[1].metric_default > MAX_NARROW_LINK_METRIC))
{
vty_out (vty, "ISIS circuit %s metric is invalid%s",
circuit->interface->name, VTY_NEWLINE);
return CMD_ERR_AMBIGUOUS;
}
}
return CMD_SUCCESS;
}
DEFUN (metric_style,
metric_style_cmd,
"metric-style (narrow|transition|wide)",
@ -2042,8 +2082,7 @@ DEFUN (metric_style,
"Use new style of TLVs to carry wider metric\n")
{
struct isis_area *area;
struct isis_circuit *circuit;
struct listnode *node;
int ret;
area = vty->index;
assert (area);
@ -2060,25 +2099,10 @@ DEFUN (metric_style,
}
else if (strncmp (argv[0], "n", 1) == 0)
{
for (ALL_LIST_ELEMENTS_RO (area->circuit_list, node, circuit))
{
if ((area->is_type & IS_LEVEL_1) &&
(circuit->is_type & IS_LEVEL_1) &&
(circuit->metrics[0].metric_default > MAX_NARROW_LINK_METRIC))
{
vty_out (vty, "ISIS circuit %s metric is invalid%s",
circuit->interface->name, VTY_NEWLINE);
return CMD_ERR_AMBIGUOUS;
}
if ((area->is_type & IS_LEVEL_2) &&
(circuit->is_type & IS_LEVEL_2) &&
(circuit->metrics[1].metric_default > MAX_NARROW_LINK_METRIC))
{
vty_out (vty, "ISIS circuit %s metric is invalid%s",
circuit->interface->name, VTY_NEWLINE);
return CMD_ERR_AMBIGUOUS;
}
}
ret = validate_metric_style_narrow (vty, area);
if (ret != CMD_SUCCESS)
return ret;
area->newmetric = 0;
area->oldmetric = 1;
}
@ -2093,10 +2117,15 @@ DEFUN (no_metric_style,
"Use old-style (ISO 10589) or new-style packet formats\n")
{
struct isis_area *area;
int ret;
area = vty->index;
assert (area);
ret = validate_metric_style_narrow (vty, area);
if (ret != CMD_SUCCESS)
return ret;
/* Default is narrow metric. */
area->newmetric = 0;
area->oldmetric = 1;
@ -2819,11 +2848,11 @@ isis_config_write (struct vty *vty)
vty_out (vty, " no hostname dynamic%s", VTY_NEWLINE);
write++;
}
/* ISIS - Metric-Style - when true displays narrow */
if (area->oldmetric)
/* ISIS - Metric-Style - when true displays wide */
if (area->newmetric)
{
if (!area->newmetric)
vty_out (vty, " metric-style narrow%s", VTY_NEWLINE);
if (!area->oldmetric)
vty_out (vty, " metric-style wide%s", VTY_NEWLINE);
else
vty_out (vty, " metric-style transition%s", VTY_NEWLINE);
write++;