Initial revision
diff --git a/ospf6d/ospf6_message.c b/ospf6d/ospf6_message.c
new file mode 100644
index 0000000..f6577a9
--- /dev/null
+++ b/ospf6d/ospf6_message.c
@@ -0,0 +1,1972 @@
+/*
+ * 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;
+}
+