Annotation of embedaddon/quagga/ospfd/ospf_api.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * API message handling module for OSPF daemon and client.
        !             3:  * Copyright (C) 2001, 2002 Ralph Keller
        !             4:  *
        !             5:  * This file is part of GNU Zebra.
        !             6:  * 
        !             7:  * GNU Zebra is free software; you can redistribute it and/or modify
        !             8:  * it under the terms of the GNU General Public License as published
        !             9:  * by the Free Software Foundation; either version 2, or (at your
        !            10:  * option) any later version.
        !            11:  *
        !            12:  * GNU Zebra is distributed in the hope that it will be useful, but
        !            13:  * WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            15:  * General Public License for more details.
        !            16:  *
        !            17:  * You should have received a copy of the GNU General Public License
        !            18:  * along with GNU Zebra; see the file COPYING.  If not, write to the
        !            19:  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
        !            20:  * Boston, MA 02111-1307, USA.
        !            21:  */
        !            22: 
        !            23: #include <zebra.h>
        !            24: 
        !            25: #ifdef SUPPORT_OSPF_API
        !            26: #ifndef HAVE_OPAQUE_LSA
        !            27: #error "Core Opaque-LSA module must be configured."
        !            28: #endif /* HAVE_OPAQUE_LSA */
        !            29: 
        !            30: #include "linklist.h"
        !            31: #include "prefix.h"
        !            32: #include "if.h"
        !            33: #include "table.h"
        !            34: #include "memory.h"
        !            35: #include "command.h"
        !            36: #include "vty.h"
        !            37: #include "stream.h"
        !            38: #include "log.h"
        !            39: #include "thread.h"
        !            40: #include "hash.h"
        !            41: #include "sockunion.h"         /* for inet_aton() */
        !            42: #include "buffer.h"
        !            43: #include "network.h"
        !            44: 
        !            45: #include "ospfd/ospfd.h"
        !            46: #include "ospfd/ospf_interface.h"
        !            47: #include "ospfd/ospf_ism.h"
        !            48: #include "ospfd/ospf_asbr.h"
        !            49: #include "ospfd/ospf_lsa.h"
        !            50: #include "ospfd/ospf_lsdb.h"
        !            51: #include "ospfd/ospf_neighbor.h"
        !            52: #include "ospfd/ospf_nsm.h"
        !            53: #include "ospfd/ospf_flood.h"
        !            54: #include "ospfd/ospf_packet.h"
        !            55: #include "ospfd/ospf_spf.h"
        !            56: #include "ospfd/ospf_dump.h"
        !            57: #include "ospfd/ospf_route.h"
        !            58: #include "ospfd/ospf_ase.h"
        !            59: #include "ospfd/ospf_zebra.h"
        !            60: 
        !            61: #include "ospfd/ospf_api.h"
        !            62: 
        !            63: 
        !            64: /* For debugging only, will be removed */
        !            65: void
        !            66: api_opaque_lsa_print (struct lsa_header *data)
        !            67: {
        !            68:   struct opaque_lsa
        !            69:   {
        !            70:     struct lsa_header header;
        !            71:     u_char mydata[];
        !            72:   };
        !            73: 
        !            74:   struct opaque_lsa *olsa;
        !            75:   int opaquelen;
        !            76:   int i;
        !            77: 
        !            78:   ospf_lsa_header_dump (data);
        !            79: 
        !            80:   olsa = (struct opaque_lsa *) data;
        !            81: 
        !            82:   opaquelen = ntohs (data->length) - OSPF_LSA_HEADER_SIZE;
        !            83:   zlog_debug ("apiserver_lsa_print: opaquelen=%d\n", opaquelen);
        !            84: 
        !            85:   for (i = 0; i < opaquelen; i++)
        !            86:     {
        !            87:       zlog_debug ("0x%x ", olsa->mydata[i]);
        !            88:     }
        !            89:   zlog_debug ("\n");
        !            90: }
        !            91: 
        !            92: /* -----------------------------------------------------------
        !            93:  * Generic messages
        !            94:  * -----------------------------------------------------------
        !            95:  */
        !            96: 
        !            97: struct msg *
        !            98: msg_new (u_char msgtype, void *msgbody, u_int32_t seqnum, u_int16_t msglen)
        !            99: {
        !           100:   struct msg *new;
        !           101: 
        !           102:   new = XCALLOC (MTYPE_OSPF_API_MSG, sizeof (struct msg));
        !           103: 
        !           104:   new->hdr.version = OSPF_API_VERSION;
        !           105:   new->hdr.msgtype = msgtype;
        !           106:   new->hdr.msglen = htons (msglen);
        !           107:   new->hdr.msgseq = htonl (seqnum);
        !           108: 
        !           109:   new->s = stream_new (msglen);
        !           110:   assert (new->s);
        !           111:   stream_put (new->s, msgbody, msglen);
        !           112: 
        !           113:   return new;
        !           114: }
        !           115: 
        !           116: 
        !           117: /* Duplicate a message by copying content. */
        !           118: struct msg *
        !           119: msg_dup (struct msg *msg)
        !           120: {
        !           121:   struct msg *new;
        !           122: 
        !           123:   assert (msg);
        !           124: 
        !           125:   new = msg_new (msg->hdr.msgtype, STREAM_DATA (msg->s),
        !           126:                 ntohl (msg->hdr.msgseq), ntohs (msg->hdr.msglen));
        !           127:   return new;
        !           128: }
        !           129: 
        !           130: 
        !           131: /* XXX only for testing, will be removed */
        !           132: 
        !           133: struct nametab {
        !           134:   int value;
        !           135:   const char *name;
        !           136: };
        !           137: 
        !           138: const char *
        !           139: ospf_api_typename (int msgtype)
        !           140: {
        !           141:   struct nametab NameTab[] = {
        !           142:     { MSG_REGISTER_OPAQUETYPE,   "Register opaque-type",   },
        !           143:     { MSG_UNREGISTER_OPAQUETYPE, "Unregister opaque-type", },
        !           144:     { MSG_REGISTER_EVENT,        "Register event",         },
        !           145:     { MSG_SYNC_LSDB,             "Sync LSDB",              },
        !           146:     { MSG_ORIGINATE_REQUEST,     "Originate request",      },
        !           147:     { MSG_DELETE_REQUEST,        "Delete request",         },
        !           148:     { MSG_REPLY,                 "Reply",                  },
        !           149:     { MSG_READY_NOTIFY,          "Ready notify",           },
        !           150:     { MSG_LSA_UPDATE_NOTIFY,     "LSA update notify",      },
        !           151:     { MSG_LSA_DELETE_NOTIFY,     "LSA delete notify",      },
        !           152:     { MSG_NEW_IF,                "New interface",          },
        !           153:     { MSG_DEL_IF,                "Del interface",          },
        !           154:     { MSG_ISM_CHANGE,            "ISM change",             },
        !           155:     { MSG_NSM_CHANGE,            "NSM change",             },
        !           156:   };
        !           157: 
        !           158:   int i, n = sizeof (NameTab) / sizeof (NameTab[0]);
        !           159:   const char *name = NULL;
        !           160: 
        !           161:   for (i = 0; i < n; i++)
        !           162:     {
        !           163:       if (NameTab[i].value == msgtype)
        !           164:         {
        !           165:           name = NameTab[i].name;
        !           166:           break;
        !           167:         }
        !           168:     }
        !           169: 
        !           170:   return name ? name : "?";
        !           171: }
        !           172: 
        !           173: const char *
        !           174: ospf_api_errname (int errcode)
        !           175: {
        !           176:   struct nametab NameTab[] = {
        !           177:     { OSPF_API_OK,                      "OK",                         },
        !           178:     { OSPF_API_NOSUCHINTERFACE,         "No such interface",          },
        !           179:     { OSPF_API_NOSUCHAREA,              "No such area",               },
        !           180:     { OSPF_API_NOSUCHLSA,               "No such LSA",                },
        !           181:     { OSPF_API_ILLEGALLSATYPE,          "Illegal LSA type",           },
        !           182:     { OSPF_API_OPAQUETYPEINUSE,         "Opaque type in use",         },
        !           183:     { OSPF_API_OPAQUETYPENOTREGISTERED, "Opaque type not registered", },
        !           184:     { OSPF_API_NOTREADY,                "Not ready",                  },
        !           185:     { OSPF_API_NOMEMORY,                "No memory",                  },
        !           186:     { OSPF_API_ERROR,                   "Other error",                },
        !           187:     { OSPF_API_UNDEF,                   "Undefined",                  },
        !           188:   };
        !           189: 
        !           190:   int i, n = sizeof (NameTab) / sizeof (NameTab[0]);
        !           191:   const char *name = NULL;
        !           192: 
        !           193:   for (i = 0; i < n; i++)
        !           194:     {
        !           195:       if (NameTab[i].value == errcode)
        !           196:         {
        !           197:           name = NameTab[i].name;
        !           198:           break;
        !           199:         }
        !           200:     }
        !           201: 
        !           202:   return name ? name : "?";
        !           203: }
        !           204: 
        !           205: void
        !           206: msg_print (struct msg *msg)
        !           207: {
        !           208:   if (!msg)
        !           209:     {
        !           210:       zlog_debug ("msg_print msg=NULL!\n");
        !           211:       return;
        !           212:     }
        !           213: 
        !           214: #ifdef ORIGINAL_CODING
        !           215:   zlog_debug
        !           216:     ("msg=%p msgtype=%d msglen=%d msgseq=%d streamdata=%p streamsize=%lu\n",
        !           217:      msg, msg->hdr.msgtype, ntohs (msg->hdr.msglen), ntohl (msg->hdr.msgseq),
        !           218:      STREAM_DATA (msg->s), STREAM_SIZE (msg->s));
        !           219: #else /* ORIGINAL_CODING */
        !           220:   /* API message common header part. */
        !           221:   zlog_debug
        !           222:     ("API-msg [%s]: type(%d),len(%d),seq(%lu),data(%p),size(%zd)",
        !           223:      ospf_api_typename (msg->hdr.msgtype), msg->hdr.msgtype, 
        !           224:      ntohs (msg->hdr.msglen), (unsigned long) ntohl (msg->hdr.msgseq),
        !           225:      STREAM_DATA (msg->s), STREAM_SIZE (msg->s));
        !           226: 
        !           227:   /* API message body part. */
        !           228: #ifdef ndef
        !           229:   /* Generic Hex/Ascii dump */
        !           230:   DumpBuf (STREAM_DATA (msg->s), STREAM_SIZE (msg->s)); /* Sorry, deleted! */
        !           231: #else /* ndef */
        !           232:   /* Message-type dependent dump function. */
        !           233: #endif /* ndef */
        !           234: 
        !           235:   return;
        !           236: #endif /* ORIGINAL_CODING */
        !           237: }
        !           238: 
        !           239: void
        !           240: msg_free (struct msg *msg)
        !           241: {
        !           242:   if (msg->s)
        !           243:     stream_free (msg->s);
        !           244: 
        !           245:   XFREE (MTYPE_OSPF_API_MSG, msg);
        !           246: }
        !           247: 
        !           248: 
        !           249: /* Set sequence number of message */
        !           250: void
        !           251: msg_set_seq (struct msg *msg, u_int32_t seqnr)
        !           252: {
        !           253:   assert (msg);
        !           254:   msg->hdr.msgseq = htonl (seqnr);
        !           255: }
        !           256: 
        !           257: /* Get sequence number of message */
        !           258: u_int32_t
        !           259: msg_get_seq (struct msg *msg)
        !           260: {
        !           261:   assert (msg);
        !           262:   return ntohl (msg->hdr.msgseq);
        !           263: }
        !           264: 
        !           265: /* -----------------------------------------------------------
        !           266:  * Message fifo queues
        !           267:  * -----------------------------------------------------------
        !           268:  */
        !           269: 
        !           270: struct msg_fifo *
        !           271: msg_fifo_new ()
        !           272: {
        !           273:   return XCALLOC (MTYPE_OSPF_API_FIFO, sizeof (struct msg_fifo));
        !           274: }
        !           275: 
        !           276: /* Add new message to fifo. */
        !           277: void
        !           278: msg_fifo_push (struct msg_fifo *fifo, struct msg *msg)
        !           279: {
        !           280:   if (fifo->tail)
        !           281:     fifo->tail->next = msg;
        !           282:   else
        !           283:     fifo->head = msg;
        !           284: 
        !           285:   fifo->tail = msg;
        !           286:   fifo->count++;
        !           287: }
        !           288: 
        !           289: 
        !           290: /* Remove first message from fifo. */
        !           291: struct msg *
        !           292: msg_fifo_pop (struct msg_fifo *fifo)
        !           293: {
        !           294:   struct msg *msg;
        !           295: 
        !           296:   msg = fifo->head;
        !           297:   if (msg)
        !           298:     {
        !           299:       fifo->head = msg->next;
        !           300: 
        !           301:       if (fifo->head == NULL)
        !           302:        fifo->tail = NULL;
        !           303: 
        !           304:       fifo->count--;
        !           305:     }
        !           306:   return msg;
        !           307: }
        !           308: 
        !           309: /* Return first fifo entry but do not remove it. */
        !           310: struct msg *
        !           311: msg_fifo_head (struct msg_fifo *fifo)
        !           312: {
        !           313:   return fifo->head;
        !           314: }
        !           315: 
        !           316: /* Flush message fifo. */
        !           317: void
        !           318: msg_fifo_flush (struct msg_fifo *fifo)
        !           319: {
        !           320:   struct msg *op;
        !           321:   struct msg *next;
        !           322: 
        !           323:   for (op = fifo->head; op; op = next)
        !           324:     {
        !           325:       next = op->next;
        !           326:       msg_free (op);
        !           327:     }
        !           328: 
        !           329:   fifo->head = fifo->tail = NULL;
        !           330:   fifo->count = 0;
        !           331: }
        !           332: 
        !           333: /* Free API message fifo. */
        !           334: void
        !           335: msg_fifo_free (struct msg_fifo *fifo)
        !           336: {
        !           337:   msg_fifo_flush (fifo);
        !           338: 
        !           339:   XFREE (MTYPE_OSPF_API_FIFO, fifo);
        !           340: }
        !           341: 
        !           342: struct msg *
        !           343: msg_read (int fd)
        !           344: {
        !           345:   struct msg *msg;
        !           346:   struct apimsghdr hdr;
        !           347:   u_char buf[OSPF_API_MAX_MSG_SIZE];
        !           348:   int bodylen;
        !           349:   int rlen;
        !           350: 
        !           351:   /* Read message header */
        !           352:   rlen = readn (fd, (u_char *) &hdr, sizeof (struct apimsghdr));
        !           353: 
        !           354:   if (rlen < 0)
        !           355:     {
        !           356:       zlog_warn ("msg_read: readn %s", safe_strerror (errno));
        !           357:       return NULL;
        !           358:     }
        !           359:   else if (rlen == 0)
        !           360:     {
        !           361:       zlog_warn ("msg_read: Connection closed by peer");
        !           362:       return NULL;
        !           363:     }
        !           364:   else if (rlen != sizeof (struct apimsghdr))
        !           365:     {
        !           366:       zlog_warn ("msg_read: Cannot read message header!");
        !           367:       return NULL;
        !           368:     }
        !           369: 
        !           370:   /* Check version of API protocol */
        !           371:   if (hdr.version != OSPF_API_VERSION)
        !           372:     {
        !           373:       zlog_warn ("msg_read: OSPF API protocol version mismatch");
        !           374:       return NULL;
        !           375:     }
        !           376: 
        !           377:   /* Determine body length. */
        !           378:   bodylen = ntohs (hdr.msglen);
        !           379:   if (bodylen > 0)
        !           380:     {
        !           381: 
        !           382:       /* Read message body */
        !           383:       rlen = readn (fd, buf, bodylen);
        !           384:       if (rlen < 0)
        !           385:        {
        !           386:          zlog_warn ("msg_read: readn %s", safe_strerror (errno));
        !           387:          return NULL;
        !           388:        }
        !           389:       else if (rlen == 0)
        !           390:        {
        !           391:          zlog_warn ("msg_read: Connection closed by peer");
        !           392:          return NULL;
        !           393:        }
        !           394:       else if (rlen != bodylen)
        !           395:        {
        !           396:          zlog_warn ("msg_read: Cannot read message body!");
        !           397:          return NULL;
        !           398:        }
        !           399:     }
        !           400: 
        !           401:   /* Allocate new message */
        !           402:   msg = msg_new (hdr.msgtype, buf, ntohl (hdr.msgseq), ntohs (hdr.msglen));
        !           403: 
        !           404:   return msg;
        !           405: }
        !           406: 
        !           407: int
        !           408: msg_write (int fd, struct msg *msg)
        !           409: {
        !           410:   u_char buf[OSPF_API_MAX_MSG_SIZE];
        !           411:   int l;
        !           412:   int wlen;
        !           413: 
        !           414:   assert (msg);
        !           415:   assert (msg->s);
        !           416: 
        !           417:   /* Length of message including header */
        !           418:   l = sizeof (struct apimsghdr) + ntohs (msg->hdr.msglen);
        !           419: 
        !           420:   /* Make contiguous memory buffer for message */
        !           421:   memcpy (buf, &msg->hdr, sizeof (struct apimsghdr));
        !           422:   memcpy (buf + sizeof (struct apimsghdr), STREAM_DATA (msg->s),
        !           423:          ntohs (msg->hdr.msglen));
        !           424: 
        !           425:   wlen = writen (fd, buf, l);
        !           426:   if (wlen < 0)
        !           427:     {
        !           428:       zlog_warn ("msg_write: writen %s", safe_strerror (errno));
        !           429:       return -1;
        !           430:     }
        !           431:   else if (wlen == 0)
        !           432:     {
        !           433:       zlog_warn ("msg_write: Connection closed by peer");
        !           434:       return -1;
        !           435:     }
        !           436:   else if (wlen != l)
        !           437:     {
        !           438:       zlog_warn ("msg_write: Cannot write API message");
        !           439:       return -1;
        !           440:     }
        !           441:   return 0;
        !           442: }
        !           443: 
        !           444: /* -----------------------------------------------------------
        !           445:  * Specific messages
        !           446:  * -----------------------------------------------------------
        !           447:  */
        !           448: 
        !           449: struct msg *
        !           450: new_msg_register_opaque_type (u_int32_t seqnum, u_char ltype, u_char otype)
        !           451: {
        !           452:   struct msg_register_opaque_type rmsg;
        !           453: 
        !           454:   rmsg.lsatype = ltype;
        !           455:   rmsg.opaquetype = otype;
        !           456:   memset (&rmsg.pad, 0, sizeof (rmsg.pad));
        !           457: 
        !           458:   return msg_new (MSG_REGISTER_OPAQUETYPE, &rmsg, seqnum,
        !           459:                  sizeof (struct msg_register_opaque_type));
        !           460: }
        !           461: 
        !           462: struct msg *
        !           463: new_msg_register_event (u_int32_t seqnum, struct lsa_filter_type *filter)
        !           464: {
        !           465:   u_char buf[OSPF_API_MAX_MSG_SIZE];
        !           466:   struct msg_register_event *emsg;
        !           467:   int len;
        !           468: 
        !           469:   emsg = (struct msg_register_event *) buf;
        !           470:   len = sizeof (struct msg_register_event) +
        !           471:     filter->num_areas * sizeof (struct in_addr);
        !           472:   emsg->filter.typemask = htons (filter->typemask);
        !           473:   emsg->filter.origin = filter->origin;
        !           474:   emsg->filter.num_areas = filter->num_areas;
        !           475:   return msg_new (MSG_REGISTER_EVENT, emsg, seqnum, len);
        !           476: }
        !           477: 
        !           478: struct msg *
        !           479: new_msg_sync_lsdb (u_int32_t seqnum, struct lsa_filter_type *filter)
        !           480: {
        !           481:   u_char buf[OSPF_API_MAX_MSG_SIZE];
        !           482:   struct msg_sync_lsdb *smsg;
        !           483:   int len;
        !           484: 
        !           485:   smsg = (struct msg_sync_lsdb *) buf;
        !           486:   len = sizeof (struct msg_sync_lsdb) +
        !           487:     filter->num_areas * sizeof (struct in_addr);
        !           488:   smsg->filter.typemask = htons (filter->typemask);
        !           489:   smsg->filter.origin = filter->origin;
        !           490:   smsg->filter.num_areas = filter->num_areas;
        !           491:   return msg_new (MSG_SYNC_LSDB, smsg, seqnum, len);
        !           492: }
        !           493: 
        !           494: 
        !           495: struct msg *
        !           496: new_msg_originate_request (u_int32_t seqnum,
        !           497:                           struct in_addr ifaddr,
        !           498:                           struct in_addr area_id, struct lsa_header *data)
        !           499: {
        !           500:   struct msg_originate_request *omsg;
        !           501:   int omsglen;
        !           502:   char buf[OSPF_API_MAX_MSG_SIZE];
        !           503: 
        !           504:   omsglen = sizeof (struct msg_originate_request) - sizeof (struct lsa_header)
        !           505:     + ntohs (data->length);
        !           506: 
        !           507:   omsg = (struct msg_originate_request *) buf;
        !           508:   omsg->ifaddr = ifaddr;
        !           509:   omsg->area_id = area_id;
        !           510:   memcpy (&omsg->data, data, ntohs (data->length));
        !           511: 
        !           512:   return msg_new (MSG_ORIGINATE_REQUEST, omsg, seqnum, omsglen);
        !           513: }
        !           514: 
        !           515: struct msg *
        !           516: new_msg_delete_request (u_int32_t seqnum,
        !           517:                        struct in_addr area_id, u_char lsa_type,
        !           518:                        u_char opaque_type, u_int32_t opaque_id)
        !           519: {
        !           520:   struct msg_delete_request dmsg;
        !           521:   dmsg.area_id = area_id;
        !           522:   dmsg.lsa_type = lsa_type;
        !           523:   dmsg.opaque_type = opaque_type;
        !           524:   dmsg.opaque_id = htonl (opaque_id);
        !           525:   memset (&dmsg.pad, 0, sizeof (dmsg.pad));
        !           526: 
        !           527:   return msg_new (MSG_DELETE_REQUEST, &dmsg, seqnum,
        !           528:                  sizeof (struct msg_delete_request));
        !           529: }
        !           530: 
        !           531: 
        !           532: struct msg *
        !           533: new_msg_reply (u_int32_t seqnr, u_char rc)
        !           534: {
        !           535:   struct msg *msg;
        !           536:   struct msg_reply rmsg;
        !           537: 
        !           538:   /* Set return code */
        !           539:   rmsg.errcode = rc;
        !           540:   memset (&rmsg.pad, 0, sizeof (rmsg.pad));
        !           541: 
        !           542:   msg = msg_new (MSG_REPLY, &rmsg, seqnr, sizeof (struct msg_reply));
        !           543: 
        !           544:   return msg;
        !           545: }
        !           546: 
        !           547: struct msg *
        !           548: new_msg_ready_notify (u_int32_t seqnr, u_char lsa_type,
        !           549:                      u_char opaque_type, struct in_addr addr)
        !           550: {
        !           551:   struct msg_ready_notify rmsg;
        !           552: 
        !           553:   rmsg.lsa_type = lsa_type;
        !           554:   rmsg.opaque_type = opaque_type;
        !           555:   memset (&rmsg.pad, 0, sizeof (rmsg.pad));
        !           556:   rmsg.addr = addr;
        !           557: 
        !           558:   return msg_new (MSG_READY_NOTIFY, &rmsg, seqnr,
        !           559:                  sizeof (struct msg_ready_notify));
        !           560: }
        !           561: 
        !           562: struct msg *
        !           563: new_msg_new_if (u_int32_t seqnr,
        !           564:                struct in_addr ifaddr, struct in_addr area_id)
        !           565: {
        !           566:   struct msg_new_if nmsg;
        !           567: 
        !           568:   nmsg.ifaddr = ifaddr;
        !           569:   nmsg.area_id = area_id;
        !           570: 
        !           571:   return msg_new (MSG_NEW_IF, &nmsg, seqnr, sizeof (struct msg_new_if));
        !           572: }
        !           573: 
        !           574: struct msg *
        !           575: new_msg_del_if (u_int32_t seqnr, struct in_addr ifaddr)
        !           576: {
        !           577:   struct msg_del_if dmsg;
        !           578: 
        !           579:   dmsg.ifaddr = ifaddr;
        !           580: 
        !           581:   return msg_new (MSG_DEL_IF, &dmsg, seqnr, sizeof (struct msg_del_if));
        !           582: }
        !           583: 
        !           584: struct msg *
        !           585: new_msg_ism_change (u_int32_t seqnr, struct in_addr ifaddr,
        !           586:                    struct in_addr area_id, u_char status)
        !           587: {
        !           588:   struct msg_ism_change imsg;
        !           589: 
        !           590:   imsg.ifaddr = ifaddr;
        !           591:   imsg.area_id = area_id;
        !           592:   imsg.status = status;
        !           593:   memset (&imsg.pad, 0, sizeof (imsg.pad));
        !           594: 
        !           595:   return msg_new (MSG_ISM_CHANGE, &imsg, seqnr,
        !           596:                  sizeof (struct msg_ism_change));
        !           597: }
        !           598: 
        !           599: struct msg *
        !           600: new_msg_nsm_change (u_int32_t seqnr, struct in_addr ifaddr,
        !           601:                    struct in_addr nbraddr,
        !           602:                    struct in_addr router_id, u_char status)
        !           603: {
        !           604:   struct msg_nsm_change nmsg;
        !           605: 
        !           606:   nmsg.ifaddr = ifaddr;
        !           607:   nmsg.nbraddr = nbraddr;
        !           608:   nmsg.router_id = router_id;
        !           609:   nmsg.status = status;
        !           610:   memset (&nmsg.pad, 0, sizeof (nmsg.pad));
        !           611: 
        !           612:   return msg_new (MSG_NSM_CHANGE, &nmsg, seqnr,
        !           613:                  sizeof (struct msg_nsm_change));
        !           614: }
        !           615: 
        !           616: struct msg *
        !           617: new_msg_lsa_change_notify (u_char msgtype,
        !           618:                           u_int32_t seqnum,
        !           619:                           struct in_addr ifaddr,
        !           620:                           struct in_addr area_id,
        !           621:                           u_char is_self_originated, struct lsa_header *data)
        !           622: {
        !           623:   u_char buf[OSPF_API_MAX_MSG_SIZE];
        !           624:   struct msg_lsa_change_notify *nmsg;
        !           625:   int len;
        !           626: 
        !           627:   assert (data);
        !           628: 
        !           629:   nmsg = (struct msg_lsa_change_notify *) buf;
        !           630:   len = ntohs (data->length) + sizeof (struct msg_lsa_change_notify)
        !           631:     - sizeof (struct lsa_header);
        !           632:   nmsg->ifaddr = ifaddr;
        !           633:   nmsg->area_id = area_id;
        !           634:   nmsg->is_self_originated = is_self_originated;
        !           635:   memset (&nmsg->pad, 0, sizeof (nmsg->pad));
        !           636:   memcpy (&nmsg->data, data, ntohs (data->length));
        !           637: 
        !           638:   return msg_new (msgtype, nmsg, seqnum, len);
        !           639: }
        !           640: 
        !           641: #endif /* SUPPORT_OSPF_API */

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