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ospf6_intra.c
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/*
* Copyright (C) 2003 Yasuhiro Ohara
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "log.h"
#include "linklist.h"
#include "thread.h"
#include "memory.h"
#include "if.h"
#include "prefix.h"
#include "table.h"
#include "vty.h"
#include "command.h"
#include "vrf.h"
#include "ospf6_proto.h"
#include "ospf6_message.h"
#include "ospf6_route.h"
#include "ospf6_lsa.h"
#include "ospf6_lsdb.h"
#include "ospf6_top.h"
#include "ospf6_area.h"
#include "ospf6_interface.h"
#include "ospf6_neighbor.h"
#include "ospf6_intra.h"
#include "ospf6_asbr.h"
#include "ospf6_abr.h"
#include "ospf6_flood.h"
#include "ospf6d.h"
#include "ospf6_spf.h"
unsigned char conf_debug_ospf6_brouter = 0;
uint32_t conf_debug_ospf6_brouter_specific_router_id;
uint32_t conf_debug_ospf6_brouter_specific_area_id;
#define MAX_LSA_PAYLOAD (1024 + 256)
/******************************/
/* RFC2740 3.4.3.1 Router-LSA */
/******************************/
static char *ospf6_router_lsa_get_nbr_id(struct ospf6_lsa *lsa, char *buf,
int buflen, int pos)
{
struct ospf6_router_lsa *router_lsa;
struct ospf6_router_lsdesc *lsdesc;
char *start, *end;
char buf1[INET_ADDRSTRLEN], buf2[INET_ADDRSTRLEN];
if (lsa) {
router_lsa = (struct ospf6_router_lsa
*)((char *)lsa->header
+ sizeof(struct ospf6_lsa_header));
start = (char *)router_lsa + sizeof(struct ospf6_router_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
lsdesc = (struct ospf6_router_lsdesc
*)(start
+ pos * (sizeof(struct
ospf6_router_lsdesc)));
if ((char *)lsdesc < end) {
if (buf && (buflen > INET_ADDRSTRLEN * 2)) {
inet_ntop(AF_INET,
&lsdesc->neighbor_interface_id, buf1,
sizeof(buf1));
inet_ntop(AF_INET, &lsdesc->neighbor_router_id,
buf2, sizeof(buf2));
sprintf(buf, "%s/%s", buf2, buf1);
}
} else
return NULL;
}
return buf;
}
static int ospf6_router_lsa_show(struct vty *vty, struct ospf6_lsa *lsa)
{
char *start, *end, *current;
char buf[32], name[32], bits[16], options[32];
struct ospf6_router_lsa *router_lsa;
struct ospf6_router_lsdesc *lsdesc;
router_lsa =
(struct ospf6_router_lsa *)((char *)lsa->header
+ sizeof(struct ospf6_lsa_header));
ospf6_capability_printbuf(router_lsa->bits, bits, sizeof(bits));
ospf6_options_printbuf(router_lsa->options, options, sizeof(options));
vty_out(vty, " Bits: %s Options: %s\n", bits, options);
start = (char *)router_lsa + sizeof(struct ospf6_router_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
for (current = start;
current + sizeof(struct ospf6_router_lsdesc) <= end;
current += sizeof(struct ospf6_router_lsdesc)) {
lsdesc = (struct ospf6_router_lsdesc *)current;
if (lsdesc->type == OSPF6_ROUTER_LSDESC_POINTTOPOINT)
snprintf(name, sizeof(name), "Point-To-Point");
else if (lsdesc->type == OSPF6_ROUTER_LSDESC_TRANSIT_NETWORK)
snprintf(name, sizeof(name), "Transit-Network");
else if (lsdesc->type == OSPF6_ROUTER_LSDESC_STUB_NETWORK)
snprintf(name, sizeof(name), "Stub-Network");
else if (lsdesc->type == OSPF6_ROUTER_LSDESC_VIRTUAL_LINK)
snprintf(name, sizeof(name), "Virtual-Link");
else
snprintf(name, sizeof(name), "Unknown (%#x)",
lsdesc->type);
vty_out(vty, " Type: %s Metric: %d\n", name,
ntohs(lsdesc->metric));
vty_out(vty, " Interface ID: %s\n",
inet_ntop(AF_INET, &lsdesc->interface_id, buf,
sizeof(buf)));
vty_out(vty, " Neighbor Interface ID: %s\n",
inet_ntop(AF_INET, &lsdesc->neighbor_interface_id, buf,
sizeof(buf)));
vty_out(vty, " Neighbor Router ID: %s\n",
inet_ntop(AF_INET, &lsdesc->neighbor_router_id, buf,
sizeof(buf)));
}
return 0;
}
static void ospf6_router_lsa_options_set(struct ospf6_area *oa,
struct ospf6_router_lsa *router_lsa)
{
OSPF6_OPT_CLEAR_ALL(router_lsa->options);
memcpy(router_lsa->options, oa->options, 3);
if (ospf6_is_router_abr(ospf6))
SET_FLAG(router_lsa->bits, OSPF6_ROUTER_BIT_B);
else
UNSET_FLAG(router_lsa->bits, OSPF6_ROUTER_BIT_B);
if (!IS_AREA_STUB(oa) && ospf6_asbr_is_asbr(oa->ospf6)) {
SET_FLAG(router_lsa->bits, OSPF6_ROUTER_BIT_E);
} else {
UNSET_FLAG(router_lsa->bits, OSPF6_ROUTER_BIT_E);
}
UNSET_FLAG(router_lsa->bits, OSPF6_ROUTER_BIT_V);
UNSET_FLAG(router_lsa->bits, OSPF6_ROUTER_BIT_W);
}
int ospf6_router_is_stub_router(struct ospf6_lsa *lsa)
{
struct ospf6_router_lsa *rtr_lsa;
if (lsa != NULL && OSPF6_LSA_IS_TYPE(ROUTER, lsa)) {
rtr_lsa = (struct ospf6_router_lsa
*)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
if (!OSPF6_OPT_ISSET(rtr_lsa->options, OSPF6_OPT_R)) {
return OSPF6_IS_STUB_ROUTER;
} else if (!OSPF6_OPT_ISSET(rtr_lsa->options, OSPF6_OPT_V6)) {
return OSPF6_IS_STUB_ROUTER_V6;
}
}
return OSPF6_NOT_STUB_ROUTER;
}
int ospf6_router_lsa_originate(struct thread *thread)
{
struct ospf6_area *oa;
char buffer[OSPF6_MAX_LSASIZE];
struct ospf6_lsa_header *lsa_header;
struct ospf6_lsa *lsa;
uint32_t link_state_id = 0;
struct listnode *node, *nnode;
struct listnode *j;
struct ospf6_interface *oi;
struct ospf6_neighbor *on, *drouter = NULL;
struct ospf6_router_lsa *router_lsa;
struct ospf6_router_lsdesc *lsdesc;
uint16_t type;
uint32_t router;
int count;
oa = (struct ospf6_area *)THREAD_ARG(thread);
oa->thread_router_lsa = NULL;
if (IS_OSPF6_DEBUG_ORIGINATE(ROUTER))
zlog_debug("Originate Router-LSA for Area %s", oa->name);
memset(buffer, 0, sizeof(buffer));
lsa_header = (struct ospf6_lsa_header *)buffer;
router_lsa =
(struct ospf6_router_lsa *)((caddr_t)lsa_header
+ sizeof(struct ospf6_lsa_header));
ospf6_router_lsa_options_set(oa, router_lsa);
/* describe links for each interfaces */
lsdesc = (struct ospf6_router_lsdesc
*)((caddr_t)router_lsa
+ sizeof(struct ospf6_router_lsa));
for (ALL_LIST_ELEMENTS(oa->if_list, node, nnode, oi)) {
/* Interfaces in state Down or Loopback are not described */
if (oi->state == OSPF6_INTERFACE_DOWN
|| oi->state == OSPF6_INTERFACE_LOOPBACK)
continue;
/* Nor are interfaces without any full adjacencies described */
count = 0;
for (ALL_LIST_ELEMENTS_RO(oi->neighbor_list, j, on))
if (on->state == OSPF6_NEIGHBOR_FULL)
count++;
if (count == 0)
continue;
/* Multiple Router-LSA instance according to size limit setting
*/
if ((oa->router_lsa_size_limit != 0)
&& ((size_t)((char *)lsdesc - buffer)
+ sizeof(struct ospf6_router_lsdesc)
> oa->router_lsa_size_limit)) {
if ((caddr_t)lsdesc
== (caddr_t)router_lsa
+ sizeof(struct ospf6_router_lsa)) {
if (IS_OSPF6_DEBUG_ORIGINATE(ROUTER))
zlog_debug(
"Size limit setting for Router-LSA too short");
return 0;
}
/* Fill LSA Header */
lsa_header->age = 0;
lsa_header->type = htons(OSPF6_LSTYPE_ROUTER);
lsa_header->id = htonl(link_state_id);
lsa_header->adv_router = oa->ospf6->router_id;
lsa_header->seqnum = ospf6_new_ls_seqnum(
lsa_header->type, lsa_header->id,
lsa_header->adv_router, oa->lsdb);
lsa_header->length =
htons((caddr_t)lsdesc - (caddr_t)buffer);
/* LSA checksum */
ospf6_lsa_checksum(lsa_header);
/* create LSA */
lsa = ospf6_lsa_create(lsa_header);
/* Originate */
ospf6_lsa_originate_area(lsa, oa);
/* Reset Buffer to fill next Router LSA */
memset(buffer, 0, sizeof(buffer));
lsa_header = (struct ospf6_lsa_header *)buffer;
router_lsa =
(struct ospf6_router_lsa
*)((caddr_t)lsa_header
+ sizeof(struct ospf6_lsa_header));
ospf6_router_lsa_options_set(oa, router_lsa);
/* describe links for each interfaces */
lsdesc = (struct ospf6_router_lsdesc
*)((caddr_t)router_lsa
+ sizeof(struct ospf6_router_lsa));
link_state_id++;
}
/* Point-to-Point interfaces */
if (oi->type == OSPF_IFTYPE_POINTOPOINT) {
for (ALL_LIST_ELEMENTS_RO(oi->neighbor_list, j, on)) {
if (on->state != OSPF6_NEIGHBOR_FULL)
continue;
lsdesc->type = OSPF6_ROUTER_LSDESC_POINTTOPOINT;
lsdesc->metric = htons(oi->cost);
lsdesc->interface_id =
htonl(oi->interface->ifindex);
lsdesc->neighbor_interface_id =
htonl(on->ifindex);
lsdesc->neighbor_router_id = on->router_id;
lsdesc++;
}
}
/* Broadcast and NBMA interfaces */
else if (oi->type == OSPF_IFTYPE_BROADCAST) {
/* If this router is not DR,
and If this router not fully adjacent with DR,
this interface is not transit yet: ignore. */
if (oi->state != OSPF6_INTERFACE_DR) {
drouter =
ospf6_neighbor_lookup(oi->drouter, oi);
if (drouter == NULL
|| drouter->state != OSPF6_NEIGHBOR_FULL)
continue;
}
lsdesc->type = OSPF6_ROUTER_LSDESC_TRANSIT_NETWORK;
lsdesc->metric = htons(oi->cost);
lsdesc->interface_id = htonl(oi->interface->ifindex);
if (oi->state != OSPF6_INTERFACE_DR) {
lsdesc->neighbor_interface_id =
htonl(drouter->ifindex);
lsdesc->neighbor_router_id = drouter->router_id;
} else {
lsdesc->neighbor_interface_id =
htonl(oi->interface->ifindex);
lsdesc->neighbor_router_id =
oi->area->ospf6->router_id;
}
lsdesc++;
} else {
assert(0); /* Unknown interface type */
}
/* Virtual links */
/* xxx */
/* Point-to-Multipoint interfaces */
/* xxx */
}
/* Fill LSA Header */
lsa_header->age = 0;
lsa_header->type = htons(OSPF6_LSTYPE_ROUTER);
lsa_header->id = htonl(link_state_id);
lsa_header->adv_router = oa->ospf6->router_id;
lsa_header->seqnum =
ospf6_new_ls_seqnum(lsa_header->type, lsa_header->id,
lsa_header->adv_router, oa->lsdb);
lsa_header->length = htons((caddr_t)lsdesc - (caddr_t)buffer);
/* LSA checksum */
ospf6_lsa_checksum(lsa_header);
/* create LSA */
lsa = ospf6_lsa_create(lsa_header);
/* Originate */
ospf6_lsa_originate_area(lsa, oa);
link_state_id++;
/* Do premature-aging of rest, undesired Router-LSAs */
type = ntohs(OSPF6_LSTYPE_ROUTER);
router = oa->ospf6->router_id;
count = 0;
for (ALL_LSDB_TYPED_ADVRTR(oa->lsdb, type, router, lsa)) {
if (ntohl(lsa->header->id) < link_state_id)
continue;
ospf6_lsa_purge(lsa);
count++;
}
/*
* Waiting till the LSA is actually removed from the database to trigger
* SPF delays network convergence. Unlike IPv4, for an ABR, when all
* interfaces associated with an area are gone, triggering an SPF right
* away
* helps convergence with inter-area routes.
*/
if (count && !link_state_id)
ospf6_spf_schedule(oa->ospf6,
OSPF6_SPF_FLAGS_ROUTER_LSA_ORIGINATED);
return 0;
}
/*******************************/
/* RFC2740 3.4.3.2 Network-LSA */
/*******************************/
static char *ospf6_network_lsa_get_ar_id(struct ospf6_lsa *lsa, char *buf,
int buflen, int pos)
{
char *start, *end, *current;
struct ospf6_network_lsa *network_lsa;
struct ospf6_network_lsdesc *lsdesc;
if (lsa) {
network_lsa = (struct ospf6_network_lsa
*)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
start = (char *)network_lsa + sizeof(struct ospf6_network_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
current = start + pos * (sizeof(struct ospf6_network_lsdesc));
if ((current + sizeof(struct ospf6_network_lsdesc)) <= end) {
lsdesc = (struct ospf6_network_lsdesc *)current;
if (buf)
inet_ntop(AF_INET, &lsdesc->router_id, buf,
buflen);
} else
return NULL;
}
return (buf);
}
static int ospf6_network_lsa_show(struct vty *vty, struct ospf6_lsa *lsa)
{
char *start, *end, *current;
struct ospf6_network_lsa *network_lsa;
struct ospf6_network_lsdesc *lsdesc;
char buf[128], options[32];
network_lsa =
(struct ospf6_network_lsa *)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
ospf6_options_printbuf(network_lsa->options, options, sizeof(options));
vty_out(vty, " Options: %s\n", options);
start = (char *)network_lsa + sizeof(struct ospf6_network_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
for (current = start;
current + sizeof(struct ospf6_network_lsdesc) <= end;
current += sizeof(struct ospf6_network_lsdesc)) {
lsdesc = (struct ospf6_network_lsdesc *)current;
inet_ntop(AF_INET, &lsdesc->router_id, buf, sizeof(buf));
vty_out(vty, " Attached Router: %s\n", buf);
}
return 0;
}
int ospf6_network_lsa_originate(struct thread *thread)
{
struct ospf6_interface *oi;
char buffer[OSPF6_MAX_LSASIZE];
struct ospf6_lsa_header *lsa_header;
int count;
struct ospf6_lsa *old, *lsa;
struct ospf6_network_lsa *network_lsa;
struct ospf6_network_lsdesc *lsdesc;
struct ospf6_neighbor *on;
struct ospf6_link_lsa *link_lsa;
struct listnode *i;
uint16_t type;
oi = (struct ospf6_interface *)THREAD_ARG(thread);
oi->thread_network_lsa = NULL;
/* The interface must be enabled until here. A Network-LSA of a
disabled interface (but was once enabled) should be flushed
by ospf6_lsa_refresh (), and does not come here. */
assert(oi->area);
old = ospf6_lsdb_lookup(htons(OSPF6_LSTYPE_NETWORK),
htonl(oi->interface->ifindex),
oi->area->ospf6->router_id, oi->area->lsdb);
/* Do not originate Network-LSA if not DR */
if (oi->state != OSPF6_INTERFACE_DR) {
if (old) {
ospf6_lsa_purge(old);
/*
* Waiting till the LSA is actually removed from the
* database to
* trigger SPF delays network convergence.
*/
ospf6_spf_schedule(
oi->area->ospf6,
OSPF6_SPF_FLAGS_NETWORK_LSA_ORIGINATED);
}
return 0;
}
if (IS_OSPF6_DEBUG_ORIGINATE(NETWORK))
zlog_debug("Originate Network-LSA for Interface %s",
oi->interface->name);
/* If none of neighbor is adjacent to us */
count = 0;
for (ALL_LIST_ELEMENTS_RO(oi->neighbor_list, i, on))
if (on->state == OSPF6_NEIGHBOR_FULL)
count++;
if (count == 0) {
if (IS_OSPF6_DEBUG_ORIGINATE(NETWORK))
zlog_debug("Interface stub, ignore");
if (old)
ospf6_lsa_purge(old);
return 0;
}
/* prepare buffer */
memset(buffer, 0, sizeof(buffer));
lsa_header = (struct ospf6_lsa_header *)buffer;
network_lsa =
(struct ospf6_network_lsa *)((caddr_t)lsa_header
+ sizeof(struct ospf6_lsa_header));
/* Collect the interface's Link-LSAs to describe
network's optional capabilities */
type = htons(OSPF6_LSTYPE_LINK);
for (ALL_LSDB_TYPED(oi->lsdb, type, lsa)) {
link_lsa = (struct ospf6_link_lsa
*)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
network_lsa->options[0] |= link_lsa->options[0];
network_lsa->options[1] |= link_lsa->options[1];
network_lsa->options[2] |= link_lsa->options[2];
}
lsdesc = (struct ospf6_network_lsdesc
*)((caddr_t)network_lsa
+ sizeof(struct ospf6_network_lsa));
/* set Link Description to the router itself */
lsdesc->router_id = oi->area->ospf6->router_id;
lsdesc++;
/* Walk through the neighbors */
for (ALL_LIST_ELEMENTS_RO(oi->neighbor_list, i, on)) {
if (on->state != OSPF6_NEIGHBOR_FULL)
continue;
/* set this neighbor's Router-ID to LSA */
lsdesc->router_id = on->router_id;
lsdesc++;
}
/* Fill LSA Header */
lsa_header->age = 0;
lsa_header->type = htons(OSPF6_LSTYPE_NETWORK);
lsa_header->id = htonl(oi->interface->ifindex);
lsa_header->adv_router = oi->area->ospf6->router_id;
lsa_header->seqnum =
ospf6_new_ls_seqnum(lsa_header->type, lsa_header->id,
lsa_header->adv_router, oi->area->lsdb);
lsa_header->length = htons((caddr_t)lsdesc - (caddr_t)buffer);
/* LSA checksum */
ospf6_lsa_checksum(lsa_header);
/* create LSA */
lsa = ospf6_lsa_create(lsa_header);
/* Originate */
ospf6_lsa_originate_area(lsa, oi->area);
return 0;
}
/****************************/
/* RFC2740 3.4.3.6 Link-LSA */
/****************************/
static char *ospf6_link_lsa_get_prefix_str(struct ospf6_lsa *lsa, char *buf,
int buflen, int pos)
{
char *start, *end, *current;
struct ospf6_link_lsa *link_lsa;
struct in6_addr in6;
struct ospf6_prefix *prefix;
int cnt = 0, prefixnum;
if (lsa) {
link_lsa = (struct ospf6_link_lsa
*)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
if (pos == 0) {
inet_ntop(AF_INET6, &link_lsa->linklocal_addr, buf,
buflen);
return (buf);
}
prefixnum = ntohl(link_lsa->prefix_num);
if (pos > prefixnum)
return NULL;
start = (char *)link_lsa + sizeof(struct ospf6_link_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
current = start;
do {
prefix = (struct ospf6_prefix *)current;
if (prefix->prefix_length == 0
|| current + OSPF6_PREFIX_SIZE(prefix) > end) {
return NULL;
}
if (cnt < pos) {
current =
start + pos * OSPF6_PREFIX_SIZE(prefix);
cnt++;
} else {
memset(&in6, 0, sizeof(in6));
memcpy(&in6, OSPF6_PREFIX_BODY(prefix),
OSPF6_PREFIX_SPACE(
prefix->prefix_length));
inet_ntop(AF_INET6, &in6, buf, buflen);
return (buf);
}
} while (current <= end);
}
return NULL;
}
static int ospf6_link_lsa_show(struct vty *vty, struct ospf6_lsa *lsa)
{
char *start, *end, *current;
struct ospf6_link_lsa *link_lsa;
int prefixnum;
char buf[128], options[32];
struct ospf6_prefix *prefix;
const char *p, *mc, *la, *nu;
struct in6_addr in6;
link_lsa = (struct ospf6_link_lsa *)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
ospf6_options_printbuf(link_lsa->options, options, sizeof(options));
inet_ntop(AF_INET6, &link_lsa->linklocal_addr, buf, sizeof(buf));
prefixnum = ntohl(link_lsa->prefix_num);
vty_out(vty, " Priority: %d Options: %s\n", link_lsa->priority,
options);
vty_out(vty, " LinkLocal Address: %s\n", buf);
vty_out(vty, " Number of Prefix: %d\n", prefixnum);
start = (char *)link_lsa + sizeof(struct ospf6_link_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
for (current = start; current < end;
current += OSPF6_PREFIX_SIZE(prefix)) {
prefix = (struct ospf6_prefix *)current;
if (prefix->prefix_length == 0
|| current + OSPF6_PREFIX_SIZE(prefix) > end)
break;
p = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_P)
? "P"
: "--");
mc = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_MC)
? "MC"
: "--");
la = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_LA)
? "LA"
: "--");
nu = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_NU)
? "NU"
: "--");
vty_out(vty, " Prefix Options: %s|%s|%s|%s\n", p, mc, la,
nu);
memset(&in6, 0, sizeof(in6));
memcpy(&in6, OSPF6_PREFIX_BODY(prefix),
OSPF6_PREFIX_SPACE(prefix->prefix_length));
inet_ntop(AF_INET6, &in6, buf, sizeof(buf));
vty_out(vty, " Prefix: %s/%d\n", buf,
prefix->prefix_length);
}
return 0;
}
int ospf6_link_lsa_originate(struct thread *thread)
{
struct ospf6_interface *oi;
char buffer[OSPF6_MAX_LSASIZE];
struct ospf6_lsa_header *lsa_header;
struct ospf6_lsa *old, *lsa;
struct ospf6_link_lsa *link_lsa;
struct ospf6_route *route;
struct ospf6_prefix *op;
oi = (struct ospf6_interface *)THREAD_ARG(thread);
oi->thread_link_lsa = NULL;
assert(oi->area);
/* find previous LSA */
old = ospf6_lsdb_lookup(htons(OSPF6_LSTYPE_LINK),
htonl(oi->interface->ifindex),
oi->area->ospf6->router_id, oi->lsdb);
if (CHECK_FLAG(oi->flag, OSPF6_INTERFACE_DISABLE)) {
if (old)
ospf6_lsa_purge(old);
return 0;
}
if (IS_OSPF6_DEBUG_ORIGINATE(LINK))
zlog_debug("Originate Link-LSA for Interface %s",
oi->interface->name);
/* can't make Link-LSA if linklocal address not set */
if (oi->linklocal_addr == NULL) {
if (IS_OSPF6_DEBUG_ORIGINATE(LINK))
zlog_debug(
"No Linklocal address on %s, defer originating",
oi->interface->name);
if (old)
ospf6_lsa_purge(old);
return 0;
}
/* prepare buffer */
memset(buffer, 0, sizeof(buffer));
lsa_header = (struct ospf6_lsa_header *)buffer;
link_lsa = (struct ospf6_link_lsa *)((caddr_t)lsa_header
+ sizeof(struct ospf6_lsa_header));
/* Fill Link-LSA */
link_lsa->priority = oi->priority;
memcpy(link_lsa->options, oi->area->options, 3);
memcpy(&link_lsa->linklocal_addr, oi->linklocal_addr,
sizeof(struct in6_addr));
link_lsa->prefix_num = htonl(oi->route_connected->count);
op = (struct ospf6_prefix *)((caddr_t)link_lsa
+ sizeof(struct ospf6_link_lsa));
/* connected prefix to advertise */
for (route = ospf6_route_head(oi->route_connected); route;
route = ospf6_route_next(route)) {
op->prefix_length = route->prefix.prefixlen;
op->prefix_options = route->path.prefix_options;
op->prefix_metric = htons(0);
memcpy(OSPF6_PREFIX_BODY(op), &route->prefix.u.prefix6,
OSPF6_PREFIX_SPACE(op->prefix_length));
op = OSPF6_PREFIX_NEXT(op);
}
/* Fill LSA Header */
lsa_header->age = 0;
lsa_header->type = htons(OSPF6_LSTYPE_LINK);
lsa_header->id = htonl(oi->interface->ifindex);
lsa_header->adv_router = oi->area->ospf6->router_id;
lsa_header->seqnum =
ospf6_new_ls_seqnum(lsa_header->type, lsa_header->id,
lsa_header->adv_router, oi->lsdb);
lsa_header->length = htons((caddr_t)op - (caddr_t)buffer);
/* LSA checksum */
ospf6_lsa_checksum(lsa_header);
/* create LSA */
lsa = ospf6_lsa_create(lsa_header);
/* Originate */
ospf6_lsa_originate_interface(lsa, oi);
return 0;
}
/*****************************************/
/* RFC2740 3.4.3.7 Intra-Area-Prefix-LSA */
/*****************************************/
static char *ospf6_intra_prefix_lsa_get_prefix_str(struct ospf6_lsa *lsa,
char *buf, int buflen,
int pos)
{
char *start, *end, *current;
struct ospf6_intra_prefix_lsa *intra_prefix_lsa;
struct in6_addr in6;
int prefixnum, cnt = 0;
struct ospf6_prefix *prefix;
if (lsa) {
intra_prefix_lsa =
(struct ospf6_intra_prefix_lsa
*)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
prefixnum = ntohs(intra_prefix_lsa->prefix_num);
if (pos > prefixnum)
return NULL;
start = (char *)intra_prefix_lsa
+ sizeof(struct ospf6_intra_prefix_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
current = start;
do {
prefix = (struct ospf6_prefix *)current;
if (prefix->prefix_length == 0
|| current + OSPF6_PREFIX_SIZE(prefix) > end) {
return NULL;
}
if (cnt < pos) {
current =
start + pos * OSPF6_PREFIX_SIZE(prefix);
cnt++;
} else {
memset(&in6, 0, sizeof(in6));
memcpy(&in6, OSPF6_PREFIX_BODY(prefix),
OSPF6_PREFIX_SPACE(
prefix->prefix_length));
inet_ntop(AF_INET6, &in6, buf, buflen);
sprintf(&buf[strlen(buf)], "/%d",
prefix->prefix_length);
return (buf);
}
} while (current <= end);
}
return (buf);
}
static int ospf6_intra_prefix_lsa_show(struct vty *vty, struct ospf6_lsa *lsa)
{
char *start, *end, *current;
struct ospf6_intra_prefix_lsa *intra_prefix_lsa;
int prefixnum;
char buf[128];
struct ospf6_prefix *prefix;
char id[16], adv_router[16];
const char *p, *mc, *la, *nu;
struct in6_addr in6;
intra_prefix_lsa = (struct ospf6_intra_prefix_lsa
*)((caddr_t)lsa->header
+ sizeof(struct ospf6_lsa_header));
prefixnum = ntohs(intra_prefix_lsa->prefix_num);
vty_out(vty, " Number of Prefix: %d\n", prefixnum);
inet_ntop(AF_INET, &intra_prefix_lsa->ref_id, id, sizeof(id));
inet_ntop(AF_INET, &intra_prefix_lsa->ref_adv_router, adv_router,
sizeof(adv_router));
vty_out(vty, " Reference: %s Id: %s Adv: %s\n",
ospf6_lstype_name(intra_prefix_lsa->ref_type), id, adv_router);
start = (char *)intra_prefix_lsa
+ sizeof(struct ospf6_intra_prefix_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
for (current = start; current < end;
current += OSPF6_PREFIX_SIZE(prefix)) {
prefix = (struct ospf6_prefix *)current;
if (prefix->prefix_length == 0
|| current + OSPF6_PREFIX_SIZE(prefix) > end)
break;
p = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_P)
? "P"
: "--");
mc = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_MC)
? "MC"
: "--");
la = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_LA)
? "LA"
: "--");
nu = (CHECK_FLAG(prefix->prefix_options, OSPF6_PREFIX_OPTION_NU)
? "NU"
: "--");
vty_out(vty, " Prefix Options: %s|%s|%s|%s\n", p, mc, la,
nu);
memset(&in6, 0, sizeof(in6));
memcpy(&in6, OSPF6_PREFIX_BODY(prefix),
OSPF6_PREFIX_SPACE(prefix->prefix_length));
inet_ntop(AF_INET6, &in6, buf, sizeof(buf));
vty_out(vty, " Prefix: %s/%d\n", buf,
prefix->prefix_length);
}
return 0;
}
int ospf6_intra_prefix_lsa_originate_stub(struct thread *thread)
{
struct ospf6_area *oa;
char buffer[OSPF6_MAX_LSASIZE];
struct ospf6_lsa_header *lsa_header;
struct ospf6_lsa *old, *lsa, *old_next = NULL;
struct ospf6_intra_prefix_lsa *intra_prefix_lsa;
struct ospf6_interface *oi;
struct ospf6_neighbor *on;
struct ospf6_route *route;
struct ospf6_prefix *op;
struct listnode *i, *j;
int full_count = 0;
unsigned short prefix_num = 0;
char buf[PREFIX2STR_BUFFER];
struct ospf6_route_table *route_advertise;
int ls_id = 0;
oa = (struct ospf6_area *)THREAD_ARG(thread);
oa->thread_intra_prefix_lsa = NULL;
/* find previous LSA */
old = ospf6_lsdb_lookup(htons(OSPF6_LSTYPE_INTRA_PREFIX), htonl(0),
oa->ospf6->router_id, oa->lsdb);
if (!IS_AREA_ENABLED(oa)) {
if (old) {
ospf6_lsa_purge(old);
/* find previous LSA */
old_next = ospf6_lsdb_lookup(
htons(OSPF6_LSTYPE_INTRA_PREFIX),
htonl(++ls_id), oa->ospf6->router_id, oa->lsdb);
while (old_next) {
ospf6_lsa_purge(old_next);
old_next = ospf6_lsdb_lookup(
htons(OSPF6_LSTYPE_INTRA_PREFIX),
htonl(++ls_id), oa->ospf6->router_id,
oa->lsdb);
}
}
return 0;
}
if (IS_OSPF6_DEBUG_ORIGINATE(INTRA_PREFIX))
zlog_debug(
"Originate Intra-Area-Prefix-LSA for area %s's stub prefix",
oa->name);
/* prepare buffer */
memset(buffer, 0, sizeof(buffer));
lsa_header = (struct ospf6_lsa_header *)buffer;
intra_prefix_lsa = (struct ospf6_intra_prefix_lsa
*)((caddr_t)lsa_header
+ sizeof(struct ospf6_lsa_header));
/* Fill Intra-Area-Prefix-LSA */
intra_prefix_lsa->ref_type = htons(OSPF6_LSTYPE_ROUTER);
intra_prefix_lsa->ref_id = htonl(0);
intra_prefix_lsa->ref_adv_router = oa->ospf6->router_id;
route_advertise = ospf6_route_table_create(0, 0);
for (ALL_LIST_ELEMENTS_RO(oa->if_list, i, oi)) {
if (oi->state == OSPF6_INTERFACE_DOWN) {
if (IS_OSPF6_DEBUG_ORIGINATE(INTRA_PREFIX))
zlog_debug(" Interface %s is down, ignore",
oi->interface->name);
continue;
}
full_count = 0;
for (ALL_LIST_ELEMENTS_RO(oi->neighbor_list, j, on))
if (on->state == OSPF6_NEIGHBOR_FULL)
full_count++;
if (oi->state != OSPF6_INTERFACE_LOOPBACK
&& oi->state != OSPF6_INTERFACE_POINTTOPOINT
&& full_count != 0) {
if (IS_OSPF6_DEBUG_ORIGINATE(INTRA_PREFIX))
zlog_debug(" Interface %s is not stub, ignore",
oi->interface->name);
continue;
}
if (IS_OSPF6_DEBUG_ORIGINATE(INTRA_PREFIX))
zlog_debug(" Interface %s:", oi->interface->name);
/* connected prefix to advertise */
for (route = ospf6_route_head(oi->route_connected); route;
route = ospf6_route_best_next(route)) {
if (IS_OSPF6_DEBUG_ORIGINATE(INTRA_PREFIX)) {
prefix2str(&route->prefix, buf, sizeof(buf));
zlog_debug(" include %s", buf);
}
ospf6_route_add(ospf6_route_copy(route),
route_advertise);
}
}
if (route_advertise->count == 0) {
if (old) {
ls_id = 0;
ospf6_lsa_purge(old);