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mirror_frr/ospf6d/ospf6_message.c
paul 718e374419 Initial revision
2002-12-13 20:15:29 +00:00

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/*
* Copyright (C) 1999 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 GNU Zebra; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "ospf6d.h"
int
is_ospf6_message_dump (u_char type)
{
if (type > OSPF6_MESSAGE_TYPE_LSACK)
type = OSPF6_MESSAGE_TYPE_UNKNOWN;
switch (type)
{
case OSPF6_MESSAGE_TYPE_UNKNOWN:
return 1;
break;
case OSPF6_MESSAGE_TYPE_HELLO:
if (IS_OSPF6_DUMP_HELLO)
return 1;
break;
case OSPF6_MESSAGE_TYPE_DBDESC:
if (IS_OSPF6_DUMP_DBDESC)
return 1;
break;
case OSPF6_MESSAGE_TYPE_LSREQ:
if (IS_OSPF6_DUMP_LSREQ)
return 1;
break;
case OSPF6_MESSAGE_TYPE_LSUPDATE:
if (IS_OSPF6_DUMP_LSUPDATE)
return 1;
break;
case OSPF6_MESSAGE_TYPE_LSACK:
if (IS_OSPF6_DUMP_LSACK)
return 1;
break;
default:
break;
}
return 0;
}
#define IS_OSPF6_DUMP_MESSAGE(x) (is_ospf6_message_dump(x))
char *ospf6_message_type_string[] =
{
"Unknown", "Hello", "DbDesc", "LSReq", "LSUpdate", "LSAck", NULL
};
void
ospf6_message_log_lsa_header (struct ospf6_lsa_header *lsa_header)
{
char buf_id[16], buf_router[16], typebuf[32];
inet_ntop (AF_INET, &lsa_header->advrtr, buf_router, sizeof (buf_router));
inet_ntop (AF_INET, &lsa_header->ls_id, buf_id, sizeof (buf_id));
zlog_info (" [%s ID=%s Adv=%s]",
ospf6_lsa_type_string (lsa_header->type, typebuf,
sizeof (typebuf)),
buf_id, buf_router);
zlog_info (" Age=%hu SeqNum=%#lx Cksum=%#hx Len=%hu",
ntohs (lsa_header->age), (u_long)ntohl (lsa_header->seqnum),
ntohs (lsa_header->checksum), ntohs (lsa_header->length));
}
static void
ospf6_message_log_unknown (struct iovec *message)
{
zlog_info ("Message: Unknown");
}
static void
ospf6_message_log_hello (struct iovec *message)
{
struct ospf6_header *ospf6_header;
u_int16_t length_left;
struct ospf6_hello *hello;
char dr_str[16], bdr_str[16];
char *start, *end, *current;
/* calculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length_left = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length_left = (length_left < iov_totallen (message) - sizeof (struct ospf6_header) ?
length_left : iov_totallen (message) - sizeof (struct ospf6_header));
hello = (struct ospf6_hello *) message[1].iov_base;
inet_ntop (AF_INET, &hello->dr, dr_str, sizeof (dr_str));
inet_ntop (AF_INET, &hello->bdr, bdr_str, sizeof (bdr_str));
zlog_info (" IFID:%ld Priority:%d Option:%s",
(u_long)ntohl (hello->interface_id), hello->rtr_pri, "xxx");
zlog_info (" HelloInterval:%hu Deadinterval:%hu",
ntohs (hello->hello_interval),
ntohs (hello->router_dead_interval));
zlog_info (" DR:%s BDR:%s", dr_str, bdr_str);
start = (char *) (hello + 1);
if (start >= (char *) message[1].iov_base + message[1].iov_len)
start = message[2].iov_base;
end = (char *) start + (length_left - sizeof (struct ospf6_hello));
for (current = start; current < end; current += sizeof (u_int32_t))
{
char neighbor[16];
inet_ntop (AF_INET, current, neighbor, sizeof (neighbor));
zlog_info (" Neighbor: %s", neighbor);
}
}
static void
ospf6_message_log_dbdesc (struct iovec *message)
{
struct ospf6_header *ospf6_header;
u_int16_t length_left;
struct ospf6_dbdesc *dbdesc;
int i;
char buffer[16];
struct ospf6_lsa_header *lsa_header;
/* calculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length_left = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length_left = (length_left < iov_totallen (message) - sizeof (struct ospf6_header) ?
length_left : iov_totallen (message) - sizeof (struct ospf6_header));
dbdesc = (struct ospf6_dbdesc *) message[1].iov_base;
ospf6_options_string (dbdesc->options, buffer, sizeof (buffer));
zlog_info (" Option:%s IFMTU:%hu", buffer, ntohs (dbdesc->ifmtu));
zlog_info (" Bits:%s%s%s SeqNum:%#lx",
(DD_IS_IBIT_SET (dbdesc->bits) ? "I" : "-"),
(DD_IS_MBIT_SET (dbdesc->bits) ? "M" : "-"),
(DD_IS_MSBIT_SET (dbdesc->bits) ? "m" : "s"),
(u_long)ntohl (dbdesc->seqnum));
for (lsa_header = (struct ospf6_lsa_header *) (dbdesc + 1);
(char *)(lsa_header + 1) <= (char *)(message[1].iov_base + message[1].iov_len) &&
(char *)(lsa_header + 1) <= (char *)dbdesc + length_left;
lsa_header++)
ospf6_message_log_lsa_header (lsa_header);
length_left -= message[1].iov_len;
for (i = 2; message[i].iov_base; i++)
{
for (lsa_header = (struct ospf6_lsa_header *) message[i].iov_base;
(char *)(lsa_header + 1) <= (char *) (message[i].iov_base +
message[i].iov_len) &&
(char *)(lsa_header + 1) <= (char *) (message[i].iov_base + length_left);
lsa_header++)
ospf6_message_log_lsa_header (lsa_header);
length_left -= message[i].iov_len;
}
}
static void
ospf6_message_log_lsreq (struct iovec *message)
{
struct ospf6_header *ospf6_header;
u_int16_t length_left;
int i;
struct ospf6_lsreq *lsreq;
char buf_router[16], buf_id[16], buf_type[16];
/* calculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length_left = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length_left = (length_left < iov_totallen (message) - sizeof (struct ospf6_header) ?
length_left : iov_totallen (message) - sizeof (struct ospf6_header));
for (i = 1; message[i].iov_base; i++)
{
for (lsreq = (struct ospf6_lsreq *) message[i].iov_base;
(char *)(lsreq + 1) <= (char *) (message[i].iov_base + message[i].iov_len) &&
(char *)(lsreq + 1) <= (char *) (message[i].iov_base + length_left);
lsreq++)
{
inet_ntop (AF_INET, &lsreq->adv_router, buf_router, sizeof (buf_router));
inet_ntop (AF_INET, &lsreq->id, buf_id, sizeof (buf_id));
zlog_info (" [%s ID=%s Adv=%s]",
ospf6_lsa_type_string (lsreq->type, buf_type,
sizeof (buf_type)),
buf_id, buf_router);
}
length_left -= message[i].iov_len;
}
}
static void
ospf6_message_log_lsupdate (struct iovec *message)
{
struct ospf6_header *ospf6_header;
u_int16_t length_left;
int i, lsanum;
struct ospf6_lsupdate *lsupdate;
struct ospf6_lsa_header *lsa_header;
/* calculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length_left = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length_left = (length_left < iov_totallen (message) - sizeof (struct ospf6_header) ?
length_left : iov_totallen (message) - sizeof (struct ospf6_header));
lsupdate = (struct ospf6_lsupdate *) message[1].iov_base;
lsanum = ntohl (lsupdate->lsupdate_num);
zlog_info (" Number of LSA: #%d", lsanum);
for (lsa_header = (struct ospf6_lsa_header *) (lsupdate + 1);
(char *)lsa_header < (char *)(message[1].iov_base + message[1].iov_len) &&
(char *)lsa_header < (char *)(message[1].iov_base + length_left);
lsa_header = OSPF6_LSA_NEXT (lsa_header))
ospf6_message_log_lsa_header (lsa_header);
length_left -= message[1].iov_len;
for (i = 2; message[i].iov_base; i++)
{
for (lsa_header = (struct ospf6_lsa_header *) message[i].iov_base;
(char *)lsa_header < (char *) (message[i].iov_base + message[i].iov_len) &&
(char *)lsa_header < (char *) (message[i].iov_base + length_left);
lsa_header = OSPF6_LSA_NEXT (lsa_header))
ospf6_message_log_lsa_header (lsa_header);
length_left -= message[i].iov_len;
}
}
static void
ospf6_message_log_lsack (struct iovec *message)
{
struct ospf6_header *ospf6_header;
u_int16_t length_left;
struct ospf6_lsa_header *lsa_header;
int i;
/* calculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length_left = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length_left = (length_left < iov_totallen (message) - sizeof (struct ospf6_header) ?
length_left : iov_totallen (message) - sizeof (struct ospf6_header));
for (i = 1; message[i].iov_base; i++)
{
for (lsa_header = (struct ospf6_lsa_header *) message[i].iov_base;
(char *)(lsa_header + 1) <= (char *) (message[i].iov_base +
message[i].iov_len) &&
(char *)(lsa_header + 1) <= (char *) (message[i].iov_base + length_left);
lsa_header++)
ospf6_message_log_lsa_header (lsa_header);
length_left -= message[i].iov_len;
}
}
struct {
void (*message_log) (struct iovec *);
} ospf6_message_log_body [] =
{
{ospf6_message_log_unknown},
{ospf6_message_log_hello},
{ospf6_message_log_dbdesc},
{ospf6_message_log_lsreq},
{ospf6_message_log_lsupdate},
{ospf6_message_log_lsack},
};
static void
ospf6_message_log (struct iovec *message)
{
struct ospf6_header *o6h;
char router_id[16], area_id[16];
u_char type;
assert (message[0].iov_len == sizeof (struct ospf6_header));
o6h = (struct ospf6_header *) message[0].iov_base;
inet_ntop (AF_INET, &o6h->router_id, router_id, sizeof (router_id));
inet_ntop (AF_INET, &o6h->area_id, area_id, sizeof (area_id));
zlog_info (" OSPFv%d Type:%d Len:%hu RouterID:%s",
o6h->version, o6h->type, ntohs (o6h->len), router_id);
zlog_info (" AreaID:%s Cksum:%hx InstanceID:%d",
area_id, ntohs (o6h->cksum), o6h->instance_id);
type = (OSPF6_MESSAGE_TYPE_UNKNOWN < o6h->type &&
o6h->type <= OSPF6_MESSAGE_TYPE_LSACK ?
o6h->type : OSPF6_MESSAGE_TYPE_UNKNOWN);
(* ospf6_message_log_body[type].message_log) (&message[0]);
}
int
ospf6_opt_is_mismatch (unsigned char opt, char *options1, char *options2)
{
return (OSPF6_OPT_ISSET (options1, opt) ^ OSPF6_OPT_ISSET (options2, opt));
}
void
ospf6_process_unknown (struct iovec *message,
struct in6_addr *src,
struct in6_addr *dst,
struct ospf6_interface *o6i,
u_int32_t router_id)
{
zlog_warn ("unknown message type, drop");
}
void
ospf6_process_hello (struct iovec *message,
struct in6_addr *src,
struct in6_addr *dst,
struct ospf6_interface *o6i,
u_int32_t router_id)
{
struct ospf6_header *ospf6_header;
u_int16_t length;
struct ospf6_hello *hello;
char changes = 0;
#define CHANGE_RTRPRI (1 << 0)
#define CHANGE_DR (1 << 1)
#define CHANGE_BDR (1 << 2)
int twoway = 0, backupseen = 0, nbchange = 0;
u_int32_t *router_id_ptr;
int i, seenrtrnum = 0, router_id_space = 0;
char strbuf[64];
struct ospf6_neighbor *o6n = NULL;
/* assert interface */
assert (o6i);
/* caluculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length = (length < message[1].iov_len ? length : message[1].iov_len);
/* set hello pointer */
hello = (struct ospf6_hello *) message[1].iov_base;
/* find neighbor. if cannot be found, create */
o6n = ospf6_neighbor_lookup (router_id, o6i);
if (!o6n)
{
o6n = ospf6_neighbor_create (router_id, o6i);
o6n->ifid = ntohl (hello->interface_id);
o6n->prevdr = o6n->dr = hello->dr;
o6n->prevbdr = o6n->bdr = hello->bdr;
o6n->priority = hello->rtr_pri;
memcpy (&o6n->hisaddr, src, sizeof (struct in6_addr));
}
/* HelloInterval check */
if (ntohs (hello->hello_interval) != o6i->hello_interval)
{
zlog_warn ("HelloInterval mismatch with %s", o6n->str);
return;
}
/* RouterDeadInterval check */
if (ntohs (hello->router_dead_interval)
!= o6i->dead_interval)
{
zlog_warn ("RouterDeadInterval mismatch with %s", o6n->str);
return;
}
/* check options */
/* Ebit */
if (ospf6_opt_is_mismatch (OSPF6_OPT_E, hello->options, o6i->area->options))
{
zlog_warn ("Ebit mismatch with %s", o6n->str);
return;
}
/* RouterPriority set */
if (o6n->priority != hello->rtr_pri)
{
o6n->priority = hello->rtr_pri;
if (IS_OSPF6_DUMP_HELLO)
zlog_info ("%s: RouterPriority changed", o6n->str);
changes |= CHANGE_RTRPRI;
}
/* DR set */
if (o6n->dr != hello->dr)
{
/* save previous dr, set current */
o6n->prevdr = o6n->dr;
o6n->dr = hello->dr;
inet_ntop (AF_INET, &o6n->dr, strbuf, sizeof (strbuf));
if (IS_OSPF6_DUMP_HELLO)
zlog_info ("%s declare %s as DR", o6n->str, strbuf);
changes |= CHANGE_DR;
}
/* BDR set */
if (o6n->bdr != hello->bdr)
{
/* save previous bdr, set current */
o6n->prevbdr = o6n->bdr;
o6n->bdr = hello->bdr;
inet_ntop (AF_INET, &o6n->bdr, strbuf, sizeof (strbuf));
if (IS_OSPF6_DUMP_HELLO)
zlog_info ("%s declare %s as BDR", o6n->str, strbuf);
changes |= CHANGE_BDR;
}
/* TwoWay check */
router_id_space = length - sizeof (struct ospf6_hello);
seenrtrnum = router_id_space / sizeof (u_int32_t);
router_id_ptr = (u_int32_t *) (hello + 1);
for (i = 0; i < seenrtrnum; i++)
{
if (*router_id_ptr == o6i->area->ospf6->router_id)
twoway++;
router_id_ptr++;
}
/* execute neighbor events */
thread_execute (master, hello_received, o6n, 0);
if (twoway)
thread_execute (master, twoway_received, o6n, 0);
else
thread_execute (master, oneway_received, o6n, 0);
/* BackupSeen check */
if (o6i->state == IFS_WAITING)
{
if (hello->dr == hello->bdr &&
hello->dr == o6n->router_id)
zlog_warn ("*** DR Election of %s is illegal", o6n->str);
if (hello->bdr == o6n->router_id)
backupseen++;
else if (hello->dr == o6n->router_id && hello->bdr == 0)
backupseen++;
}
/* NeighborChange check */
if (changes & CHANGE_RTRPRI)
nbchange++;
if (changes & CHANGE_DR)
if (o6n->prevdr == o6n->router_id || o6n->dr == o6n->router_id)
nbchange++;
if (changes & CHANGE_BDR)
if (o6n->prevbdr == o6n->router_id || o6n->bdr == o6n->router_id)
nbchange++;
/* schedule interface events */
if (backupseen)
thread_add_event (master, backup_seen, o6i, 0);
if (nbchange)
thread_add_event (master, neighbor_change, o6i, 0);
return;
}
int
ospf6_dbdesc_is_master (struct ospf6_neighbor *o6n)
{
char buf[128];
if (o6n->router_id == ospf6->router_id)
{
inet_ntop (AF_INET6, &o6n->hisaddr, buf, sizeof (buf));
zlog_warn ("Message: Neighbor router-id conflicts: %s: %s",
o6n->str, buf);
return -1;
}
else if (ntohl (o6n->router_id) > ntohl (ospf6->router_id))
return 0;
return 1;
}
int
ospf6_dbdesc_is_duplicate (struct ospf6_dbdesc *received,
struct ospf6_dbdesc *last_received)
{
if (memcmp (received->options, last_received->options, 3) != 0)
return 0;
if (received->ifmtu != last_received->ifmtu)
return 0;
if (received->bits != last_received->bits)
return 0;
if (received->seqnum != last_received->seqnum)
return 0;
return 1;
}
void
ospf6_process_dbdesc_master (struct iovec *message, struct ospf6_neighbor *o6n)
{
struct ospf6_header *ospf6_header;
u_int16_t length, lsa_count;
struct ospf6_dbdesc *dbdesc;
struct ospf6_lsa_header *lsa_header;
/* caluculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length = (length < message[1].iov_len ? length : message[1].iov_len);
/* set database description pointer */
dbdesc = (struct ospf6_dbdesc *) message[1].iov_base;
switch (o6n->state)
{
case NBS_DOWN:
case NBS_ATTEMPT:
case NBS_TWOWAY:
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("DbDesc from %s Ignored: state less than Init",
o6n->str);
return;
case NBS_INIT:
thread_execute (master, twoway_received, o6n, 0);
if (o6n->state != NBS_EXSTART)
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("DbDesc from %s Ignored: state less than ExStart",
o6n->str);
return;
}
/* else fall through to ExStart */
case NBS_EXSTART:
if (DDBIT_IS_SLAVE (dbdesc->bits) &&
!DDBIT_IS_INITIAL (dbdesc->bits) &&
ntohl (dbdesc->seqnum) == o6n->dbdesc_seqnum)
{
ospf6_neighbor_dbex_init (o6n);
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc = (struct thread *) NULL;
thread_add_event (master, negotiation_done, o6n, 0);
}
else
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info (" negotiation failed with %s", o6n->str);
return;
}
break;
case NBS_EXCHANGE:
/* duplicate dbdesc dropped by master */
if (!memcmp (dbdesc, &o6n->last_dd,
sizeof (struct ospf6_dbdesc)))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info (" duplicate dbdesc, drop");
return;
}
/* check Initialize bit and Master/Slave bit */
if (DDBIT_IS_INITIAL (dbdesc->bits))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("Initialize bit mismatch");
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
if (DDBIT_IS_MASTER (dbdesc->bits))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("Master/Slave bit mismatch");
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
/* dbdesc option check */
if (memcmp (dbdesc->options, o6n->last_dd.options,
sizeof (dbdesc->options)))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("dbdesc option field changed");
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
/* dbdesc sequence number check */
if (ntohl (dbdesc->seqnum) != o6n->dbdesc_seqnum)
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_warn ("*** dbdesc seqnumber mismatch: %d expected",
o6n->dbdesc_seqnum);
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
break;
case NBS_LOADING:
case NBS_FULL:
/* duplicate dbdesc dropped by master */
if (ospf6_dbdesc_is_duplicate (dbdesc, &o6n->last_dd))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info (" duplicate dbdesc, drop");
return;
}
else
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info (" not duplicate dbdesc in state %s",
ospf6_neighbor_state_string[o6n->state]);
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
break; /* not reached */
default:
assert (0);
break; /* not reached */
}
/* process LSA headers */
lsa_count = 0;
for (lsa_header = (struct ospf6_lsa_header *) (dbdesc + 1);
(char *)(lsa_header + 1) <= (char *)dbdesc + length;
lsa_header++)
{
if (ospf6_dbex_check_dbdesc_lsa_header (lsa_header, o6n) < 0)
{
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
lsa_count ++;
}
/* increment dbdesc seqnum */
o6n->dbdesc_seqnum++;
/* cancel transmission/retransmission thread */
if (o6n->thread_send_dbdesc)
thread_cancel (o6n->thread_send_dbdesc);
o6n->thread_send_dbdesc = (struct thread *) NULL;
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc = (struct thread *) NULL;
/* more bit check */
if (!DD_IS_MBIT_SET (dbdesc->bits) && !DD_IS_MBIT_SET (o6n->dbdesc_bits))
thread_add_event (master, exchange_done, o6n, 0);
else
o6n->thread_send_dbdesc =
thread_add_event (master, ospf6_send_dbdesc, o6n, 0);
/* save last received dbdesc */
memcpy (&o6n->last_dd, dbdesc, sizeof (struct ospf6_dbdesc));
/* statistics */
o6n->lsa_receive[OSPF6_MESSAGE_TYPE_DBDESC] += lsa_count;
return;
}
void
ospf6_process_dbdesc_slave (struct iovec *message, struct ospf6_neighbor *o6n)
{
struct ospf6_header *ospf6_header;
u_int16_t length, lsa_count;
struct ospf6_dbdesc *dbdesc;
struct ospf6_lsa_header *lsa_header;
/* caluculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length = (length < message[1].iov_len ? length : message[1].iov_len);
/* set database description pointer */
dbdesc = (struct ospf6_dbdesc *) message[1].iov_base;
switch (o6n->state)
{
case NBS_DOWN:
case NBS_ATTEMPT:
case NBS_TWOWAY:
return;
case NBS_INIT:
thread_execute (master, twoway_received, o6n, 0);
if (o6n->state != NBS_EXSTART)
{
return;
}
/* else fall through to ExStart */
case NBS_EXSTART:
if (DD_IS_IBIT_SET (dbdesc->bits) &&
DD_IS_MBIT_SET (dbdesc->bits) &&
DD_IS_MSBIT_SET (dbdesc->bits))
{
/* Master/Slave bit set to slave */
DD_MSBIT_CLEAR (o6n->dbdesc_bits);
/* Initialize bit clear */
DD_IBIT_CLEAR (o6n->dbdesc_bits);
/* sequence number set to master's */
o6n->dbdesc_seqnum = ntohl (dbdesc->seqnum);
ospf6_neighbor_dbex_init (o6n);
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc = (struct thread *) NULL;
thread_add_event (master, negotiation_done, o6n, 0);
}
else
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("negotiation failed");
return;
}
break;
case NBS_EXCHANGE:
/* duplicate dbdesc dropped by master */
if (!memcmp (dbdesc, &o6n->last_dd,
sizeof (struct ospf6_dbdesc)))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info (" duplicate dbdesc, retransmit dbdesc");
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc =
thread_add_event (master, ospf6_send_dbdesc_rxmt, o6n, 0);
return;
}
/* check Initialize bit and Master/Slave bit */
if (DDBIT_IS_INITIAL (dbdesc->bits))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("Initialize bit mismatch");
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
if (DDBIT_IS_SLAVE (dbdesc->bits))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("Master/Slave bit mismatch");
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
/* dbdesc option check */
if (memcmp (dbdesc->options, o6n->last_dd.options,
sizeof (dbdesc->options)))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("dbdesc option field changed");
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
/* dbdesc sequence number check */
if (ntohl (dbdesc->seqnum) != o6n->dbdesc_seqnum + 1)
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_warn ("*** dbdesc seqnumber mismatch: %d expected",
o6n->dbdesc_seqnum + 1);
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
break;
case NBS_LOADING:
case NBS_FULL:
/* duplicate dbdesc cause slave to retransmit */
if (ospf6_dbdesc_is_duplicate (dbdesc, &o6n->last_dd))
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info (" duplicate dbdesc, retransmit");
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc =
thread_add_event (master, ospf6_send_dbdesc_rxmt, o6n, 0);
return;
}
else
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info (" not duplicate dbdesc in state %s",
ospf6_neighbor_state_string[o6n->state]);
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
break; /* not reached */
default:
assert (0);
break; /* not reached */
}
/* process LSA headers */
lsa_count = 0;
for (lsa_header = (struct ospf6_lsa_header *) (dbdesc + 1);
(char *)(lsa_header + 1) <= (char *)dbdesc + length;
lsa_header++)
{
if (ospf6_dbex_check_dbdesc_lsa_header (lsa_header, o6n) < 0)
{
thread_add_event (master, seqnumber_mismatch, o6n, 0);
return;
}
lsa_count ++;
}
/* set dbdesc seqnum to master's */
o6n->dbdesc_seqnum = ntohl (dbdesc->seqnum);
if (o6n->thread_send_dbdesc)
thread_cancel (o6n->thread_send_dbdesc);
o6n->thread_send_dbdesc =
thread_add_event (master, ospf6_send_dbdesc, o6n, 0);
/* save last received dbdesc */
memcpy (&o6n->last_dd, dbdesc, sizeof (struct ospf6_dbdesc));
/* statistics */
o6n->lsa_receive[OSPF6_MESSAGE_TYPE_DBDESC] += lsa_count;
return;
}
void
ospf6_process_dbdesc (struct iovec *message,
struct in6_addr *src,
struct in6_addr *dst,
struct ospf6_interface *o6i,
u_int32_t router_id)
{
struct ospf6_header *ospf6_header;
u_int16_t length;
struct ospf6_neighbor *o6n;
struct ospf6_dbdesc *dbdesc;
int Im_master = 0;
/* assert interface */
assert (o6i);
/* caluculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length = (length < message[1].iov_len ? length : message[1].iov_len);
/* set database description pointer */
dbdesc = (struct ospf6_dbdesc *) message[1].iov_base;
/* find neighbor. if cannot be found, reject this message */
o6n = ospf6_neighbor_lookup (router_id, o6i);
if (!o6n)
{
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("neighbor not found, reject");
return;
}
if (memcmp (src, &o6n->hisaddr, sizeof (struct in6_addr)))
{
if (IS_OSPF6_DUMP_MESSAGE (ospf6_header->type))
zlog_info ("From Secondary I/F of the neighbor: ignore");
return;
}
/* interface mtu check */
/* xxx */
/* check am I master */
Im_master = ospf6_dbdesc_is_master (o6n);
if (Im_master < 0)
{
return; /* can't decide which is master, return */
}
if (Im_master)
ospf6_process_dbdesc_master (message, o6n);
else
ospf6_process_dbdesc_slave (message, o6n);
return;
}
void
ospf6_process_lsreq (struct iovec *message,
struct in6_addr *src,
struct in6_addr *dst,
struct ospf6_interface *o6i,
u_int32_t router_id)
{
struct ospf6_header *ospf6_header;
u_int16_t length;
struct ospf6_neighbor *o6n;
struct ospf6_lsreq *lsreq;
struct iovec response[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_lsa *lsa;
unsigned long lsanum = 0;
struct ospf6_lsupdate lsupdate;
char buf_id[16], buf_router[16], buf_type[16];
/* assert interface */
assert (o6i);
/* caluculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length = (length < message[1].iov_len ? length : message[1].iov_len);
/* find neighbor. if cannot be found, reject this message */
o6n = ospf6_neighbor_lookup (router_id, o6i);
if (!o6n)
{
if (IS_OSPF6_DUMP_LSREQ)
zlog_info (" neighbor not found, reject");
return;
}
if (memcmp (src, &o6n->hisaddr, sizeof (struct in6_addr)))
{
if (IS_OSPF6_DUMP_MESSAGE (ospf6_header->type))
zlog_info ("From Secondary I/F of the neighbor: ignore");
return;
}
/* In states other than ExChange, Loading, or Full, the packet
should be ignored. */
if (o6n->state != NBS_EXCHANGE && o6n->state != NBS_LOADING
&& o6n->state != NBS_FULL)
{
if (IS_OSPF6_DUMP_LSREQ)
zlog_info (" neighbor state less than Exchange, reject");
return;
}
/* Initialize response LSUpdate packet */
OSPF6_MESSAGE_CLEAR (response);
memset (&lsupdate, 0, sizeof (struct ospf6_lsupdate));
OSPF6_MESSAGE_ATTACH (response, &lsupdate, sizeof (struct ospf6_lsupdate));
/* process each request */
lsanum = 0;
for (lsreq = (struct ospf6_lsreq *) message[1].iov_base;
(char *)(lsreq + 1) <= (char *)(message[1].iov_base + length);
lsreq++)
{
inet_ntop (AF_INET, &lsreq->adv_router, buf_router, sizeof (buf_router));
inet_ntop (AF_INET, &lsreq->id, buf_id, sizeof (buf_id));
/* find instance of database copy */
lsa = ospf6_lsdb_lookup (lsreq->type, lsreq->id, lsreq->adv_router,
ospf6_lsa_get_scope (lsreq->type, o6i));
if (!lsa)
{
if (IS_OSPF6_DUMP_LSREQ)
zlog_info ("BadLSReq: %s requests [%s ID=%s Adv=%s] not found",
o6n->str, ospf6_lsa_type_string (lsreq->type, buf_type,
sizeof (buf_type)),
buf_id, buf_router);
thread_add_event (master, bad_lsreq, o6n, 0);
return;
}
/* I/F MTU check */
if (sizeof (struct ospf6_header) + sizeof (struct ospf6_lsupdate)
+ iov_totallen (response) + ntohs (lsa->header->length)
> o6i->ifmtu)
break;
OSPF6_MESSAGE_ATTACH (response, lsa->header, ntohs (lsa->header->length));
lsanum++;
}
/* send response LSUpdate to this request */
if (lsanum)
{
lsupdate.lsupdate_num = htonl (lsanum);
ospf6_message_send (OSPF6_MESSAGE_TYPE_LSUPDATE, response,
&o6n->hisaddr, o6i->if_id);
}
/* statistics */
o6n->lsa_receive[OSPF6_MESSAGE_TYPE_LSREQ]
+= length / sizeof (struct ospf6_lsreq);
}
void
ospf6_process_lsupdate (struct iovec *message,
struct in6_addr *src,
struct in6_addr *dst,
struct ospf6_interface *o6i,
u_int32_t router_id)
{
struct ospf6_header *ospf6_header;
u_int16_t length;
struct ospf6_lsupdate *lsupdate;
struct ospf6_neighbor *o6n;
unsigned long lsanum;
struct ospf6_lsa_header *lsa_header;
/* assert interface */
assert (o6i);
/* caluculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length = (length < message[1].iov_len ? length : message[1].iov_len);
/* find neighbor. if cannot be found, reject this message */
o6n = ospf6_neighbor_lookup (router_id, o6i);
if (! o6n)
{
if (IS_OSPF6_DUMP_LSUPDATE)
zlog_info (" neighbor not found, reject");
return;
}
if (memcmp (src, &o6n->hisaddr, sizeof (struct in6_addr)))
{
if (IS_OSPF6_DUMP_MESSAGE (ospf6_header->type))
zlog_info ("From Secondary I/F of the neighbor: ignore");
return;
}
/* if neighbor state less than ExChange, reject this message */
if (o6n->state < NBS_EXCHANGE)
{
if (IS_OSPF6_DUMP_LSUPDATE)
zlog_info (" neighbor state less than Exchange, reject");
return;
}
/* set linkstate update pointer */
lsupdate = (struct ospf6_lsupdate *) message[1].iov_base;
/* save linkstate update info */
lsanum = ntohl (lsupdate->lsupdate_num);
/* statistics */
o6n->ospf6_stat_received_lsa += lsanum;
o6n->ospf6_stat_received_lsupdate++;
/* RFC2328 Section 10.9: When the neighbor responds to these requests
with the proper Link State Update packet(s), the Link state request
list is truncated and a new Link State Request packet is sent. */
/* process LSAs */
for (lsa_header = (struct ospf6_lsa_header *) (lsupdate + 1);
lsanum && (char *)lsa_header < (char *)lsupdate + length;
lsanum--)
{
ospf6_dbex_receive_lsa (lsa_header, o6n);
lsa_header = OSPF6_LSA_NEXT (lsa_header);
}
/* send new Link State Request packet if this LS Update packet
can be recognized as a response to our previous LS request */
if (! IN6_IS_ADDR_MULTICAST(dst) &&
(o6n->state == NBS_EXCHANGE || o6n->state == NBS_LOADING))
thread_add_event (master, ospf6_send_lsreq, o6n, 0);
return;
}
void
ospf6_process_lsack (struct iovec *message,
struct in6_addr *src,
struct in6_addr *dst,
struct ospf6_interface *o6i,
u_int32_t router_id)
{
struct ospf6_header *ospf6_header;
u_int16_t length;
struct ospf6_neighbor *o6n;
struct ospf6_lsa_header *lsa_header;
struct ospf6_lsa *lsa, *copy, *rem;
/* assert interface */
assert (o6i);
/* caluculate length */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
length = ntohs (ospf6_header->len) - sizeof (struct ospf6_header);
length = (length < message[1].iov_len ? length : message[1].iov_len);
/* find neighbor. if cannot be found, reject this message */
o6n = ospf6_neighbor_lookup (router_id, o6i);
if (!o6n)
{
if (IS_OSPF6_DUMP_LSACK)
zlog_info ("LSACK: neighbor not found, reject");
return;
}
if (memcmp (src, &o6n->hisaddr, sizeof (struct in6_addr)))
{
if (IS_OSPF6_DUMP_LSACK)
zlog_info ("LSACK: From Secondary I/F of the neighbor: ignore");
return;
}
/* if neighbor state less than ExChange, reject this message */
if (o6n->state < NBS_EXCHANGE)
{
if (IS_OSPF6_DUMP_LSACK)
zlog_info ("LSACK: neighbor state less than Exchange, reject");
return;
}
/* process each LSA header */
for (lsa_header = (struct ospf6_lsa_header *) message[1].iov_base;
(char *)(lsa_header + 1) <= (char *)(message[1].iov_base + length);
lsa_header++)
{
/* find database copy */
copy = ospf6_lsdb_lookup (lsa_header->type, lsa_header->ls_id,
lsa_header->advrtr,
ospf6_lsa_get_scope (lsa_header->type, o6i));
/* if no database copy */
if (!copy)
{
if (IS_OSPF6_DUMP_LSACK)
zlog_info ("LSACK: no database copy, ignore");
continue;
}
/* if not on his retrans list */
rem = ospf6_lsdb_lookup_lsdb (copy->header->type, copy->header->id,
copy->header->adv_router,
o6n->retrans_list);
if (rem == NULL)
{
if (IS_OSPF6_DUMP_LSACK)
zlog_info ("LSACK: not on %s's retranslist, ignore", o6n->str);
continue;
}
/* create temporary LSA from Ack message */
lsa = ospf6_lsa_summary_create ((struct ospf6_lsa_header__ *) lsa_header);
/* if the same instance, remove from retrans list.
else, log and ignore */
if (ospf6_lsa_check_recent (lsa, copy) == 0)
ospf6_neighbor_retrans_remove (rem, o6n);
else
{
/* Log the questionable acknowledgement,
and examine the next one. */
zlog_info ("LSACK: questionable acknowledge: %s", copy->str);
zlog_info ("LSACK: received: seq: %#x age: %hu",
ntohl (lsa->header->seqnum),
ntohs (lsa->header->age));
zlog_info ("LSACK: instance: seq: %#x age: %hu",
ntohl (copy->header->seqnum),
ospf6_lsa_age_current (copy));
}
/* release temporary LSA from Ack message */
ospf6_lsa_delete (lsa);
}
ospf6_maxage_remover ();
return;
}
struct {
void (*process) (struct iovec *, struct in6_addr *, struct in6_addr *,
struct ospf6_interface *, u_int32_t);
} ospf6_message_process_type [] =
{
{ospf6_process_unknown},
{ospf6_process_hello},
{ospf6_process_dbdesc},
{ospf6_process_lsreq},
{ospf6_process_lsupdate},
{ospf6_process_lsack}
};
/* process ospf6 protocol header. then, call next process function
for each message type */
static void
ospf6_message_process (struct iovec *message,
struct in6_addr *src,
struct in6_addr *dst,
struct ospf6_interface *o6i)
{
struct ospf6_header *ospf6_header = NULL;
u_char type;
u_int32_t router_id;
char srcname[64];
assert (o6i);
assert (src);
assert (dst);
/* set ospf6_hdr pointer to head of buffer */
ospf6_header = (struct ospf6_header *) message[0].iov_base;
/* version check */
if (ospf6_header->version != OSPF6_VERSION)
{
if (IS_OSPF6_DUMP_MESSAGE (ospf6_header->type))
zlog_info ("version mismatch, drop");
return;
}
/* area id check */
if (ospf6_header->area_id != o6i->area->area_id)
{
if (ospf6_header->area_id == 0)
{
if (IS_OSPF6_DUMP_MESSAGE (ospf6_header->type))
zlog_info ("virtual link not yet, drop");
return;
}
if (IS_OSPF6_DUMP_MESSAGE (ospf6_header->type))
zlog_info ("area id mismatch, drop");
return;
}
/* instance id check */
if (ospf6_header->instance_id != o6i->instance_id)
{
if (IS_OSPF6_DUMP_MESSAGE (ospf6_header->type))
zlog_info ("instance id mismatch, drop");
return;
}
/* message type check */
type = (ospf6_header->type >= OSPF6_MESSAGE_TYPE_MAX ?
OSPF6_MESSAGE_TYPE_UNKNOWN : ospf6_header->type);
/* log */
if (IS_OSPF6_DUMP_MESSAGE (type))
{
char srcname[64], dstname[64];
inet_ntop (AF_INET6, dst, dstname, sizeof (dstname));
inet_ntop (AF_INET6, src, srcname, sizeof (srcname));
zlog_info ("Receive %s on %s",
ospf6_message_type_string[type], o6i->interface->name);
zlog_info (" %s -> %s", srcname, dstname);
ospf6_message_log (message);
}
/* router id check */
router_id = ospf6_header->router_id;
if (ospf6_header->router_id == o6i->area->ospf6->router_id)
{
inet_ntop (AF_INET6, src, srcname, sizeof (srcname));
zlog_warn ("*** Router-ID mismatch: from %s on %s",
srcname, o6i->interface->name);
return;
}
/* octet statistics relies on some asumption:
on ethernet, no IPv6 Extention header, etc */
#define OSPF6_IP6_HEADER_SIZE 40
#define OSPF6_ETHER_HEADER_SIZE 14
o6i->message_stat[type].recv++;
o6i->message_stat[type].recv_octet += ntohs (ospf6_header->len)
+ OSPF6_IP6_HEADER_SIZE + OSPF6_ETHER_HEADER_SIZE;
/* futher process */
(*ospf6_message_process_type[type].process) (&message[0], src, dst, o6i, router_id);
return;
}
int
ospf6_receive (struct thread *thread)
{
int sockfd;
struct in6_addr src, dst;
unsigned int ifindex;
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_header ospf6_header;
char buffer[OSPF6_MESSAGE_RECEIVE_BUFSIZE];
struct ospf6_interface *o6i;
unsigned char type;
/* get socket */
sockfd = THREAD_FD (thread);
/* add next read thread */
thread_add_read (master, ospf6_receive, NULL, sockfd);
/* initialize */
OSPF6_MESSAGE_CLEAR (message);
memset (&ospf6_header, 0, sizeof (struct ospf6_header));
OSPF6_MESSAGE_ATTACH (message, &ospf6_header, sizeof (struct ospf6_header));
OSPF6_MESSAGE_ATTACH (message, buffer, OSPF6_MESSAGE_RECEIVE_BUFSIZE);
/* receive message */
ospf6_recvmsg (&src, &dst, &ifindex, message);
type = (OSPF6_MESSAGE_TYPE_UNKNOWN < ospf6_header.type &&
ospf6_header.type <= OSPF6_MESSAGE_TYPE_LSACK ?
ospf6_header.type : OSPF6_MESSAGE_TYPE_UNKNOWN);
o6i = ospf6_interface_lookup_by_index (ifindex);
if (!o6i || !o6i->area)
{
//zlog_warn ("*** received interface ospf6 disabled");
return 0;
}
/* if not passive, process message */
if (! CHECK_FLAG (o6i->flag, OSPF6_INTERFACE_FLAG_PASSIVE))
ospf6_message_process (message, &src, &dst, o6i);
else if (IS_OSPF6_DUMP_MESSAGE (type))
zlog_info ("Ignore message on passive interface %s",
o6i->interface->name);
return 0;
}
/* send section */
int
ospf6_message_length (struct iovec *message)
{
int i, length = 0;
for (i = 0; i < OSPF6_MESSAGE_IOVEC_SIZE; i++)
{
if (message[i].iov_base == NULL && message[i].iov_len == 0)
break;
length += message[i].iov_len;
}
return length;
}
#define OSPF6_MESSAGE_LENGTH(msg) \
(ospf6_message_length (msg))
void
ospf6_message_send (unsigned char type, struct iovec *msg,
struct in6_addr *dst, u_int ifindex)
{
struct ospf6_interface *o6i;
struct ospf6_header ospf6_header;
char dst_name[64], src_name[64];
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
int msg_len;
/* ospf6 interface lookup */
o6i = ospf6_interface_lookup_by_index (ifindex);
assert (o6i);
msg_len = OSPF6_MESSAGE_LENGTH (msg);
/* I/F MTU check */
#if 0
if (msg_len + sizeof (struct ospf6_header) >= o6i->interface->mtu)
#else
if (msg_len + sizeof (struct ospf6_header) >= o6i->ifmtu)
#endif
{
/* If Interface MTU is 0, save the case
since zebra had been failed to get MTU from Kernel */
if (o6i->interface->mtu != 0)
{
zlog_warn ("Message: Send failed on %s: exceeds I/F MTU",
o6i->interface->name);
zlog_warn ("Message: while sending %s: Len:%d MTU:%d",
ospf6_message_type_string[type],
msg_len + sizeof (struct ospf6_header),
o6i->ifmtu);
return;
}
else
{
zlog_warn ("Message: I/F MTU check ignored on %s",
o6i->interface->name);
}
}
/* Initialize */
OSPF6_MESSAGE_CLEAR (message);
/* set OSPF header */
memset (&ospf6_header, 0, sizeof (ospf6_header));
ospf6_header.version = OSPF6_VERSION;
ospf6_header.type = type;
ospf6_header.len = htons (msg_len + sizeof (struct ospf6_header));
ospf6_header.router_id = ospf6->router_id;
ospf6_header.area_id = o6i->area->area_id;
/* checksum is calculated by kernel */
ospf6_header.instance_id = o6i->instance_id;
ospf6_header.reserved = 0;
OSPF6_MESSAGE_ATTACH (message, &ospf6_header, sizeof (struct ospf6_header));
/* Attach rest to message */
OSPF6_MESSAGE_JOIN (message, msg);
/* statistics */
if (type >= OSPF6_MESSAGE_TYPE_MAX)
type = OSPF6_MESSAGE_TYPE_UNKNOWN;
o6i->message_stat[type].send++;
o6i->message_stat[type].send_octet += ntohs (ospf6_header.len);
/* log */
if (IS_OSPF6_DUMP_MESSAGE (type))
{
inet_ntop (AF_INET6, dst, dst_name, sizeof (dst_name));
if (o6i->lladdr)
inet_ntop (AF_INET6, o6i->lladdr, src_name, sizeof (src_name));
else
memcpy (src_name, "Unknown", sizeof (src_name));
zlog_info ("Send %s on %s",
ospf6_message_type_string[type], o6i->interface->name);
zlog_info (" %s -> %s", src_name, dst_name);
ospf6_message_log (message);
}
/* send message */
ospf6_sendmsg (o6i->lladdr, dst, &ifindex, message);
}
int
ospf6_send_hello (struct thread *thread)
{
listnode n;
struct ospf6_interface *o6i;
struct ospf6_neighbor *o6n;
struct in6_addr dst;
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_hello hello;
char router_buffer[1024]; /* xxx */
u_int router_size;
/* which ospf6 interface to send */
o6i = (struct ospf6_interface *) THREAD_ARG (thread);
o6i->thread_send_hello = (struct thread *) NULL;
/* assure interface is up */
if (o6i->state <= IFS_DOWN)
{
if (IS_OSPF6_DUMP_HELLO)
zlog_warn ("Send HELLO Failed: Interface not enabled: %s",
o6i->interface->name);
return 0;
}
/* clear message buffer */
OSPF6_MESSAGE_CLEAR (message);
/* set Hello fields */
hello.interface_id = htonl (o6i->if_id);
hello.rtr_pri = o6i->priority;
memcpy (hello.options, o6i->area->options, sizeof (hello.options));
hello.hello_interval = htons (o6i->hello_interval);
hello.router_dead_interval = htons (o6i->dead_interval);
hello.dr = o6i->dr;
hello.bdr = o6i->bdr;
OSPF6_MESSAGE_ATTACH (message, &hello, sizeof (struct ospf6_hello));
/* set neighbor router id */
router_size = 0;
for (n = listhead (o6i->neighbor_list); n; nextnode (n))
{
o6n = (struct ospf6_neighbor *) getdata (n);
if (o6n->state < NBS_INIT)
continue;
if (router_size + sizeof (o6n->router_id) > sizeof (router_buffer))
{
zlog_warn ("Send HELLO: Buffer shortage on %s",
o6i->interface->name);
break;
}
/* Copy Router-ID to Buffer */
memcpy (router_buffer + router_size, &o6n->router_id,
sizeof (o6n->router_id));
router_size += sizeof (o6n->router_id);
}
OSPF6_MESSAGE_ATTACH (message, router_buffer, router_size);
/* set destionation */
inet_pton (AF_INET6, ALLSPFROUTERS6, &dst);
/* send hello */
ospf6_message_send (OSPF6_MESSAGE_TYPE_HELLO, message, &dst,
o6i->interface->ifindex);
/* set next timer thread */
o6i->thread_send_hello = thread_add_timer (master, ospf6_send_hello,
o6i, o6i->hello_interval);
return 0;
}
void
ospf6_dbdesc_seqnum_init (struct ospf6_neighbor *o6n)
{
struct timeval tv;
if (gettimeofday (&tv, (struct timezone *) NULL) < 0)
tv.tv_sec = 1;
o6n->dbdesc_seqnum = tv.tv_sec;
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("set dbdesc seqnum %d for %s", o6n->dbdesc_seqnum, o6n->str);
}
int
ospf6_send_dbdesc_rxmt (struct thread *thread)
{
struct ospf6_lsdb_node node;
struct ospf6_neighbor *o6n;
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_lsa *lsa;
struct ospf6_lsa_header *lsa_header;
struct ospf6_dbdesc dbdesc;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
/* clear thread */
o6n->thread_rxmt_dbdesc = (struct thread *) NULL;
/* if state less than ExStart, do nothing */
if (o6n->state < NBS_EXSTART)
return 0;
OSPF6_MESSAGE_CLEAR (message);
/* set dbdesc */
memcpy (dbdesc.options, o6n->ospf6_interface->area->options,
sizeof (dbdesc.options));
dbdesc.ifmtu = htons (o6n->ospf6_interface->interface->mtu);
dbdesc.bits = o6n->dbdesc_bits;
dbdesc.seqnum = htonl (o6n->dbdesc_seqnum);
OSPF6_MESSAGE_ATTACH (message, &dbdesc, sizeof (struct ospf6_dbdesc));
/* if this is not initial, set LSA summary to dbdesc */
if (! DD_IS_IBIT_SET (o6n->dbdesc_bits))
{
for (ospf6_lsdb_head (&node, o6n->dbdesc_list);
! ospf6_lsdb_is_end (&node); ospf6_lsdb_next (&node))
{
lsa = node.lsa;
/* xxx, no MTU check: no support for Dynamic MTU change */
/* set age and add InfTransDelay */
ospf6_lsa_age_update_to_send (lsa, o6n->ospf6_interface->transdelay);
/* set LSA summary to send buffer */
lsa_header = (struct ospf6_lsa_header *) lsa->lsa_hdr;
OSPF6_MESSAGE_ATTACH (message, lsa_header,
sizeof (struct ospf6_lsa_header));
}
}
/* send dbdesc */
ospf6_message_send (OSPF6_MESSAGE_TYPE_DBDESC, message, &o6n->hisaddr,
o6n->ospf6_interface->interface->ifindex);
/* if master, set futher retransmission */
if (DD_IS_MSBIT_SET (o6n->dbdesc_bits))
o6n->thread_rxmt_dbdesc =
thread_add_timer (master, ospf6_send_dbdesc_rxmt,
o6n, o6n->ospf6_interface->rxmt_interval);
/* statistics */
o6n->ospf6_stat_retrans_dbdesc++;
return 0;
}
int
ospf6_send_dbdesc (struct thread *thread)
{
struct ospf6_neighbor *o6n;
struct ospf6_lsa *lsa;
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_dbdesc dbdesc;
struct ospf6_lsdb_node node;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
/* clear thread */
o6n->thread_send_dbdesc = (struct thread *) NULL;
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc = (struct thread *) NULL;
/* if state less than ExStart, do nothing */
if (o6n->state < NBS_EXSTART)
return 0;
OSPF6_MESSAGE_CLEAR (message);
OSPF6_MESSAGE_ATTACH (message, &dbdesc, sizeof (struct ospf6_dbdesc));
/* clear previous LSA summary sent */
ospf6_lsdb_remove_all (o6n->dbdesc_list);
assert (o6n->dbdesc_list->count == 0);
/* if this is not initial, set LSA summary to dbdesc */
if (! DD_IS_IBIT_SET (o6n->dbdesc_bits))
{
for (ospf6_lsdb_head (&node, o6n->summary_list);
! ospf6_lsdb_is_end (&node);
ospf6_lsdb_next (&node))
{
lsa = node.lsa;
/* MTU check */
if (OSPF6_MESSAGE_LENGTH (message)
+ sizeof (struct ospf6_lsa_header)
+ sizeof (struct ospf6_header)
> o6n->ospf6_interface->ifmtu)
break;
/* debug */
if (IS_OSPF6_DUMP_DBDESC)
zlog_info ("Include DbDesc: %s", lsa->str);
/* attach to dbdesclist */
ospf6_neighbor_dbdesc_add (lsa, o6n);
/* detach from summarylist */
ospf6_neighbor_summary_remove (lsa, o6n);
/* set age and add InfTransDelay */
ospf6_lsa_age_update_to_send (lsa, o6n->ospf6_interface->transdelay);
/* set LSA summary to send buffer */
OSPF6_MESSAGE_ATTACH (message, lsa->header,
sizeof (struct ospf6_lsa_header));
}
if (o6n->summary_list->count == 0)
{
/* Clear more bit */
DD_MBIT_CLEAR (o6n->dbdesc_bits);
/* slave must schedule ExchangeDone on sending, here */
if (! DD_IS_MSBIT_SET (o6n->dbdesc_bits))
{
if (! DD_IS_MBIT_SET (o6n->dbdesc_bits) &&
! DD_IS_MBIT_SET (o6n->last_dd.bits))
thread_add_event (master, exchange_done, o6n, 0);
}
}
}
/* if this is initial, set seqnum */
if (DDBIT_IS_INITIAL (o6n->dbdesc_bits))
ospf6_dbdesc_seqnum_init (o6n);
/* set dbdesc */
memcpy (dbdesc.options, o6n->ospf6_interface->area->options,
sizeof (dbdesc.options));
dbdesc.ifmtu = htons (o6n->ospf6_interface->interface->mtu);
dbdesc.bits = o6n->dbdesc_bits;
dbdesc.seqnum = htonl (o6n->dbdesc_seqnum);
/* send dbdesc */
ospf6_message_send (OSPF6_MESSAGE_TYPE_DBDESC, message, &o6n->hisaddr,
o6n->ospf6_interface->interface->ifindex);
/* if master, set retransmission */
if (DD_IS_MSBIT_SET (o6n->dbdesc_bits))
o6n->thread_rxmt_dbdesc =
thread_add_timer (master, ospf6_send_dbdesc_rxmt,
o6n, o6n->ospf6_interface->rxmt_interval);
/* statistics */
o6n->lsa_send[OSPF6_MESSAGE_TYPE_DBDESC] += o6n->dbdesc_list->count;
return 0;
}
int
ospf6_send_lsreq_rxmt (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
o6n->thread_rxmt_lsreq = (struct thread *) NULL;
o6n->thread_send_lsreq = thread_add_event (master, ospf6_send_lsreq, o6n, 0);
return 0;
}
int
ospf6_send_lsreq (struct thread *thread)
{
struct ospf6_neighbor *o6n;
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_lsreq lsreq[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_lsa *lsa;
struct ospf6_lsdb_node node;
int i;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
/* LSReq will be send only in ExStart or Loading */
if (o6n->state != NBS_EXCHANGE && o6n->state != NBS_LOADING)
return 0;
/* clear thread */
o6n->thread_send_lsreq = (struct thread *) NULL;
if (o6n->thread_rxmt_lsreq)
thread_cancel (o6n->thread_rxmt_lsreq);
o6n->thread_rxmt_lsreq = (struct thread *) NULL;
/* schedule loading_done if request list is empty */
if (o6n->request_list->count == 0)
{
thread_add_event (master, loading_done, o6n, 0);
return 0;
}
/* clear message buffer */
OSPF6_MESSAGE_CLEAR (message);
i = 0;
for (ospf6_lsdb_head (&node, o6n->request_list);
! ospf6_lsdb_is_end (&node); ospf6_lsdb_next (&node))
{
lsa = node.lsa;
/* Buffer Overflow */
if (i >= OSPF6_MESSAGE_IOVEC_SIZE)
break;
/* I/F MTU check */
if (OSPF6_MESSAGE_LENGTH (message)
+ sizeof (struct ospf6_lsreq)
+ sizeof (struct ospf6_header)
> o6n->ospf6_interface->ifmtu)
break;
lsreq[i].mbz = 0;
lsreq[i].type = lsa->header->type;
lsreq[i].id = lsa->header->id;
lsreq[i].adv_router = lsa->header->adv_router;
OSPF6_MESSAGE_ATTACH (message, &lsreq[i], sizeof (struct ospf6_lsreq));
i++;
}
ospf6_message_send (OSPF6_MESSAGE_TYPE_LSREQ, message, &o6n->hisaddr,
o6n->ospf6_interface->interface->ifindex);
/* set retransmit thread */
o6n->thread_rxmt_lsreq =
thread_add_timer (master, ospf6_send_lsreq_rxmt,
o6n, o6n->ospf6_interface->rxmt_interval);
/* statistics */
o6n->lsa_send[OSPF6_MESSAGE_TYPE_LSREQ] += i;
return 0;
}
/* Send LSUpdate directly to the neighbor, from his retransmission list */
int
ospf6_send_lsupdate_rxmt (struct thread *thread)
{
struct ospf6_neighbor *o6n;
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_lsupdate lsupdate;
struct ospf6_lsa *lsa;
struct ospf6_lsdb_node node;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
o6n->send_update = (struct thread *) NULL;
if (o6n->ospf6_interface->state <= IFS_WAITING)
return -1;
/* clear message buffer */
OSPF6_MESSAGE_CLEAR (message);
/* set lsupdate header */
lsupdate.lsupdate_num = 0; /* set gradually */
OSPF6_MESSAGE_ATTACH (message, &lsupdate, sizeof (struct ospf6_lsupdate));
/* for each LSA listed on retransmission-list */
for (ospf6_lsdb_head (&node, o6n->retrans_list);
! ospf6_lsdb_is_end (&node);
ospf6_lsdb_next (&node))
{
lsa = node.lsa;
/* I/F MTU check */
if (OSPF6_MESSAGE_LENGTH (message)
+ sizeof (struct ospf6_lsupdate)
+ sizeof (struct ospf6_header)
+ ntohs (lsa->header->length)
> o6n->ospf6_interface->ifmtu)
break;
ospf6_lsa_age_update_to_send (lsa, o6n->ospf6_interface->transdelay);
OSPF6_MESSAGE_ATTACH (message, lsa->header, ntohs (lsa->header->length));
lsupdate.lsupdate_num++;
}
/* check and correct lsupdate */
if (lsupdate.lsupdate_num == 0)
return 0;
lsupdate.lsupdate_num = htonl (lsupdate.lsupdate_num);
if (IS_OSPF6_DUMP_LSUPDATE)
zlog_info ("MESSAGE: retrsnsmit LSUpdate to %s", o6n->str);
/* statistics */
o6n->ospf6_stat_retrans_lsupdate++;
ospf6_message_send (OSPF6_MESSAGE_TYPE_LSUPDATE, message,
&o6n->hisaddr, o6n->ospf6_interface->if_id);
o6n->send_update = thread_add_timer (master, ospf6_send_lsupdate_rxmt, o6n,
o6n->ospf6_interface->rxmt_interval);
return 0;
}
/* Send LSUpdate containing one LSA directly to the neighbor.
This is "implied acknowledgement" */
void
ospf6_send_lsupdate_direct (struct ospf6_lsa *lsa, struct ospf6_neighbor *o6n)
{
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_lsupdate lsupdate;
int lsa_len;
/* clear message buffer */
OSPF6_MESSAGE_CLEAR (message);
/* set lsupdate header */
lsupdate.lsupdate_num = ntohl (1);
OSPF6_MESSAGE_ATTACH (message, &lsupdate, sizeof (struct ospf6_lsupdate));
/* set one LSA */
lsa_len = ntohs (lsa->lsa_hdr->lsh_len);
ospf6_lsa_age_update_to_send (lsa, o6n->ospf6_interface->transdelay);
OSPF6_MESSAGE_ATTACH (message, lsa->lsa_hdr, lsa_len);
ospf6_message_send (OSPF6_MESSAGE_TYPE_LSUPDATE, message, &o6n->hisaddr,
o6n->ospf6_interface->if_id);
}
/* Send LSUpdate containing one LSA by multicast.
On non-broadcast link, send it to each neighbor by unicast.
This is ordinary flooding */
void
ospf6_send_lsupdate_flood (struct ospf6_lsa *lsa, struct ospf6_interface *o6i)
{
struct iovec message[OSPF6_MESSAGE_IOVEC_SIZE];
struct ospf6_lsupdate lsupdate;
struct in6_addr dst;
int lsa_len;
/* clear message buffer */
OSPF6_MESSAGE_CLEAR (message);
/* set lsupdate header */
lsupdate.lsupdate_num = ntohl (1);
OSPF6_MESSAGE_ATTACH (message, &lsupdate, sizeof (struct ospf6_lsupdate));
/* set one LSA */
lsa_len = ntohs (lsa->lsa_hdr->lsh_len);
ospf6_lsa_age_update_to_send (lsa, o6i->transdelay);
OSPF6_MESSAGE_ATTACH (message, lsa->lsa_hdr, lsa_len);
if (if_is_broadcast (o6i->interface))
{
/* set destination */
if (o6i->state == IFS_DR || o6i->state == IFS_BDR)
inet_pton (AF_INET6, ALLSPFROUTERS6, &dst);
else
inet_pton (AF_INET6, ALLDROUTERS6, &dst);
}
else
{
/* IPv6 relies on link local multicast */
inet_pton (AF_INET6, ALLSPFROUTERS6, &dst);
}
ospf6_message_send (OSPF6_MESSAGE_TYPE_LSUPDATE, message, &dst,
o6i->if_id);
}
int
ospf6_send_lsack_delayed (struct thread *thread)
{
struct ospf6_interface *o6i;
struct iovec message[MAXIOVLIST];
struct ospf6_lsa *lsa;
struct ospf6_lsdb_node node;
o6i = THREAD_ARG (thread);
assert (o6i);
if (IS_OSPF6_DUMP_LSACK)
zlog_info ("LSACK: Delayed LSAck for %s\n", o6i->interface->name);
o6i->thread_send_lsack_delayed = (struct thread *) NULL;
if (o6i->state <= IFS_WAITING)
return 0;
if (o6i->ack_list->count == 0)
return 0;
iov_clear (message, MAXIOVLIST);
for (ospf6_lsdb_head (&node, o6i->ack_list);
! ospf6_lsdb_is_end (&node);
ospf6_lsdb_next (&node))
{
lsa = node.lsa;
if (IS_OVER_MTU (message, o6i->ifmtu, sizeof (struct ospf6_lsa_hdr)))
break;
OSPF6_MESSAGE_ATTACH (message, lsa->header,
sizeof (struct ospf6_lsa_header));
ospf6_interface_delayed_ack_remove (lsa, o6i);
}
/* statistics */
o6i->ospf6_stat_delayed_lsack++;
switch (o6i->state)
{
case IFS_DR:
case IFS_BDR:
ospf6_message_send (OSPF6_MESSAGE_TYPE_LSACK, message,
&allspfrouters6.sin6_addr, o6i->if_id);
break;
default:
ospf6_message_send (OSPF6_MESSAGE_TYPE_LSACK, message,
&alldrouters6.sin6_addr, o6i->if_id);
break;
}
iov_clear (message, MAXIOVLIST);
return 0;
}
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