src/iop.c

   1 /**************************************************************************/
   2 /* ---------------------------------------------------------------------- */
   3 /* Copyright (C) 2006 - 2008 FRESCOR consortium partners:                 */
   4 /*                                                                        */
   5 /*   Universidad de Cantabria,              SPAIN                         */
   6 /*   University of York,                    UK                            */
   7 /*   Scuola Superiore Sant'Anna,            ITALY                         */
   8 /*   Kaiserslautern University,             GERMANY                       */
   9 /*   Univ. Politécnica  Valencia,           SPAIN                        */
  10 /*   Czech Technical University in Prague,  CZECH REPUBLIC                */
  11 /*   ENEA                                   SWEDEN                        */
  12 /*   Thales Communication S.A.              FRANCE                        */
  13 /*   Visual Tools S.A.                      SPAIN                         */
  14 /*   Rapita Systems Ltd                     UK                            */
  15 /*   Evidence                               ITALY                         */
  16 /*                                                                        */
  17 /*   See http://www.frescor.org for a link to partners' websites          */
  18 /*                                                                        */
  19 /*          FRESCOR project (FP6/2005/IST/5-034026) is funded             */
  20 /*       in part by the European Union Sixth Framework Programme          */
  21 /*       The European Union is not liable of any use that may be          */
  22 /*       made of this code.                                               */
  23 /*                                                                        */
  24 /*                                                                        */
  25 /*  This file is part of FORB (Frescor Object Request Broker)             */
  26 /*                                                                        */
  27 /* FORB is free software; you can redistribute it and/or modify it        */
  28 /* under terms of the GNU General Public License as published by the      */
  29 /* Free Software Foundation; either version 2, or (at your option) any    */
  30 /* later version.  FORB is distributed in the hope that it will be        */
  31 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
  32 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
  33 /* General Public License for more details. You should have received a    */
  34 /* copy of the GNU General Public License along with FORB; see file       */
  35 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
  36 /* Cambridge, MA 02139, USA.                                              */
  37 /*                                                                        */
  38 /* As a special exception, including FORB header files in a file,         */
  39 /* instantiating FORB generics or templates, or linking other files       */
  40 /* with FORB objects to produce an executable application, does not       */
  41 /* by itself cause the resulting executable application to be covered     */
  42 /* by the GNU General Public License. This exception does not             */
  43 /* however invalidate any other reasons why the executable file might be  */
  44 /* covered by the GNU Public License.                                     */
  45 /**************************************************************************/
  46
  47 /**
  48  * @file   iop.c
  49  * @author Michal Sojka <sojkam1@fel.cvut.cz>
  50  * @date   Mon Sep  1 21:51:58 2008
  51  *
  52  * @brief  Implementation of Inter-ORB protocol.
  53  *
  54  *
  55  */
  56 #include "iop.h"
  57 #include <forb/cdr.h>
  58 #include <forb/object.h>
  59 #include "proto.h"
  60 #include <ul_log.h>
  61 #include "exec_req.h"
  62 #include <errno.h>
  63 #include "peer.h"
  64 #include "discovery.h"
  65
  66 /** Version of the protocol */
  67 #define VER_MAJOR 0
  68 #define VER_MINOR 0
  69
  70 #define VER(major, minor) ((major)<<8 || (minor))
  71
  72 extern UL_LOG_CUST(ulogd_forb_iop);
  73
  74
  75 CORBA_boolean
  76 forb_iop_prepend_message_header(FORB_CDR_Codec *codec, forb_iop_message_type mt)
  77 {
  78         CORBA_boolean ret;
  79         forb_iop_message_header mh;
  80         mh.proto_version.major = VER_MAJOR;
  81         mh.proto_version.minor = VER_MINOR;
  82         mh.message_type = mt;
  83         mh.flags = (codec->data_endian == LittleEndian) ? forb_iop_LITTLE_ENDIAN : 0;
  84         mh.message_size = FORB_CDR_data_size(codec);
  85         ret = FORB_CDR_buffer_prepend(codec, forb_iop_MESSAGE_HEADER_SIZE);
  86         if (ret) {
  87                 ret = forb_iop_message_header_serialize(codec, &mh);
  88         }
  89         return ret;
  90 }
  91
  92 CORBA_boolean
  93 forb_iop_prepare_request(forb_request_t *req,
  94                          char *iface,
  95                          unsigned method_ind,
  96                          CORBA_Environment *env)
  97 {
  98         CORBA_boolean ret;
  99         forb_iop_request_header rh;
 100
 101         rh.request_id = req->request_id;
 102         rh.iface = iface;
 103         rh.objkey = forb_object_to_key(req->obj);
 104         rh.method_index = method_ind;
 105         rh.source = forb_object_to_forb(req->obj)->server_id;
 106         ret = forb_iop_request_header_serialize(&req->cdr_request, &rh);
 107         if (ret) {
 108                 /* Request body is 8 byte aligned */
 109                 ret = FORB_CDR_put_align(&req->cdr_request, 8);
 110                 char str[50];
 111                 ul_logdeb("preparing request: id=%d  dest=%s  iface=%s method=%d\n", req->request_id,
 112                           forb_server_id_to_string(str, &req->obj->server, sizeof(str)),
 113                           iface, method_ind);
 114         }
 115         return ret;
 116 }
 117
 118 static CORBA_boolean
 119 forb_iop_prepare_hello(FORB_CDR_Codec *codec,
 120                        const forb_server_id *server_id,
 121                        const void *src_addr,
 122                        CORBA_boolean (*serialize_addr)(FORB_CDR_Codec *codec, const void *addr),
 123                        const CORBA_string orb_id)
 124 {
 125         if (!forb_server_id_serialize(codec, server_id)) return CORBA_FALSE;
 126         if (serialize_addr) {
 127                 if (!serialize_addr(codec, src_addr)) return CORBA_FALSE;
 128         }
 129         if (!CORBA_string_serialize(codec, &orb_id)) return CORBA_FALSE;
 130         if (!forb_iop_prepend_message_header(codec, forb_iop_HELLO)) return CORBA_FALSE;
 131         return CORBA_TRUE;
 132 }
 133
 134 bool
 135 forb_iop_process_message_header(forb_iop_message_header *mh, FORB_CDR_Codec *codec)
 136 {
 137         /* FIXME: If we have multiple protocol versions, use different
 138          * type (independent from version) for return value instead of
 139          * mh */
 140         forb_iop_version_deserialize(codec, &mh->proto_version);
 141         switch (VER(mh->proto_version.major, mh->proto_version.minor)) {
 142                 case VER(VER_MAJOR, VER_MINOR):
 143                         forb_iop_message_type_deserialize(codec, &mh->message_type);
 144                         forb_iop_message_flags_deserialize(codec, &mh->flags);
 145                         /* Check whwther the type is meaningfull */
 146                         switch (mh->message_type) {
 147                                 case forb_iop_REQUEST:
 148                                 case forb_iop_REPLY:
 149                                 case forb_iop_HELLO:
 150                                         break;
 151                                 default:
 152                                         return false;
 153                         }
 154                         codec->data_endian = (mh->flags && forb_iop_LITTLE_ENDIAN) ?
 155                                 LittleEndian : BigEndian;
 156                         CORBA_unsigned_long_deserialize(codec, &mh->message_size);
 157                         return true;
 158                         break;
 159                 default:
 160                         return false;
 161         }
 162 }
 163
 164 static inline CORBA_boolean
 165 forb_exception_serialize(FORB_CDR_Codec *codec, struct forb_env *env)
 166 {
 167         return CORBA_long_serialize(codec, &env->major);
 168 }
 169
 170 static inline CORBA_boolean
 171 forb_exception_deserialize(FORB_CDR_Codec *codec, struct forb_env *env)
 172 {
 173         /* TODO: Declare exceptions in IDL and don't typecast here. */
 174         return CORBA_long_deserialize(codec, (CORBA_long*)&env->major);
 175 }
 176
 177 void
 178 forb_iop_send_reply(forb_t *forb,
 179            forb_server_id *dest,
 180            FORB_CDR_Codec *codec,
 181            CORBA_long request_id,
 182            struct forb_env *env)
 183 {
 184         forb_iop_reply_header reply_header;
 185         CORBA_boolean ret;
 186         forb_peer_t *peer;
 187         fosa_abs_time_t timeout;
 188
 189         reply_header.request_id = request_id;
 190         reply_header.flags = 0;
 191         if (forb_exception_occurred(env)) {
 192                 reply_header.flags |= forb_iop_FLAG_EXCEPTION;
 193                 FORB_CDR_buffer_reset(codec, forb_iop_MESSAGE_HEADER_SIZE +
 194                                              forb_iop_REPLY_HEADER_SIZE);
 195                 forb_exception_serialize(codec, env);
 196         }
 197         /* forb_iop_REPLY_HEADER_SIZE equals to 8 even if the real
 198          * header is shorter. We want reply data to be 8 byte
 199          * aligned */
 200         ret = FORB_CDR_buffer_prepend(codec, forb_iop_REPLY_HEADER_SIZE);
 201         if (!ret) {
 202                 goto err;
 203         }
 204         ret = forb_iop_reply_header_serialize(codec, &reply_header);
 205         if (!ret) {
 206                 goto err;
 207         }
 208         forb_iop_prepend_message_header(codec, forb_iop_REPLY);
 209
 210         fosa_clock_get_time(FOSA_CLOCK_ABSOLUTE, &timeout);
 211         timeout = fosa_abs_time_incr(timeout,
 212                                      fosa_msec_to_rel_time(1000));
 213
 214         peer = forb_get_next_hop(forb, dest, &timeout);
 215         if (!peer) {
 216                 char str[60];
 217                 forb_server_id_to_string(str, dest, sizeof(str));
 218                 ul_logerr("Reply destination not found: %s\n", str);
 219                 goto err;
 220         } else {
 221                 char str[60];
 222                 forb_server_id_to_string(str, dest, sizeof(str));
 223                 ul_logdeb("sending reply: dest=%s, id=%u\n", str, request_id);
 224         }
 225         forb_proto_send(peer, codec);
 226         forb_peer_put(peer);
 227 err:
 228         ;
 229 }
 230
 231 static void
 232 process_request(forb_port_t *port, FORB_CDR_Codec *codec, uint32_t message_size)
 233 {
 234         forb_iop_request_header request_header;
 235         CORBA_boolean ret;
 236         forb_object obj;
 237         size_t n;
 238         forb_t *forb = port->forb;
 239         struct forb_env env;
 240         FORB_CDR_Codec reply_codec;
 241         forb_exec_req_t *exec_req;
 242         uint32_t req_size, data_size, header_size;
 243         char str[32];
 244         forb_peer_t *peer;
 245
 246         data_size = FORB_CDR_data_size(codec);
 247         ret = forb_iop_request_header_deserialize(codec, &request_header);
 248         if (!ret) {
 249                 ul_logerr("Malformed request recevied\n");
 250                 env.major = FORB_EX_COMM_FAILURE;
 251                 goto out;
 252         }
 253         ret = FORB_CDR_get_align(codec, 8);
 254         if (!ret) {
 255                 ul_logerr("Malformed request recevied\n");
 256                 env.major = FORB_EX_COMM_FAILURE;
 257                 goto out;
 258         }
 259
 260         header_size = data_size - FORB_CDR_data_size(codec);
 261         req_size = message_size - header_size;
 262
 263         ul_logdeb("rcvd request: src=%s, id=%u, iface=%s, method=%hd\n",
 264                   forb_server_id_to_string(str, &request_header.source, sizeof(str)),
 265                   request_header.request_id,
 266                   request_header.iface,
 267                   request_header.method_index);
 268
 269         if (port->new_peer) {
 270                 /* Request from a new peer was reported by the underlaying protocol */
 271                 peer = forb_peer_find(port->forb, &request_header.source);
 272                 if (peer) {
 273                         /* We already know this peer */
 274                         /* TODO: Can it be in FORB_PEER_WANTED state?
 275                          * If yes, we cannot simply igore this. */
 276                         ul_logmsg("new_peer was already known\n");
 277                         forb_peer_put(port->new_peer);
 278                         port->new_peer = NULL;
 279                 } else {
 280                         ul_logdeb("discovered new_peer from incomming connection\n");
 281                         peer = port->new_peer;
 282                         port->new_peer = NULL;
 283                         forb_new_peer_discovered(port, peer, request_header.source,
 284                                                  peer->addr, peer->orb_id);
 285                 }
 286
 287         }
 288
 289         obj = forb_key_to_object(forb, request_header.objkey);
 290         if (!obj) {
 291                 ul_logerr("Nonexistent object key\n");
 292                 env.major = FORB_EX_OBJECT_NOT_EXIST;
 293                 goto send_execption;
 294         }
 295
 296         n = strlen(request_header.iface);
 297         ret = strncmp(request_header.iface, obj->interface->name, n);
 298         forb_free(request_header.iface);
 299         request_header.iface = NULL;
 300         if (ret != 0) {
 301                 env.major = FORB_EX_INV_OBJREF;
 302                 ul_logerr("Object reference has incorrect type\n");
 303                 goto send_execption;
 304         }
 305
 306         if (request_header.method_index >= obj->interface->num_methods) {
 307                 env.major = FORB_EX_INV_IDENT;
 308                 ul_logerr("To high method number\n");
 309                 goto send_execption;
 310         }
 311
 312         if (!obj->executor) {
 313                 env.major = FORB_EX_NO_IMPLEMENT;
 314                 ul_logerr("No executor for object\n");
 315                 goto send_execption;
 316
 317         }
 318
 319         /* Enqueue execution request */
 320         exec_req = forb_malloc(sizeof(*exec_req));
 321         if (exec_req) {
 322                 memset(exec_req, 0, sizeof(exec_req));
 323                 exec_req->request_id = request_header.request_id;
 324                 exec_req->source = request_header.source;
 325                 exec_req->obj = obj;
 326                 exec_req->method_index = request_header.method_index;
 327                 /* Copy the request to exec_req */
 328                 FORB_CDR_codec_init_static(&exec_req->codec, codec->orb);
 329                 ret = FORB_CDR_buffer_init(&exec_req->codec,
 330                                       req_size,
 331                                       0);
 332                 if (!ret) {
 333                         env.major = FORB_EX_NO_MEMORY;
 334                         ul_logerr("No memory for executor request bufer of size %d (header_size=%d)\n",
 335                                   req_size, header_size);
 336                         goto send_execption;
 337                 }
 338                 exec_req->codec.data_endian = codec->data_endian;
 339                 FORB_CDR_buffer_gets(codec, exec_req->codec.buffer, req_size);
 340                 /* TODO: Use better data structure for incomming
 341                    buffer to achieve zero-copy behaviour. */
 342                 forb_exec_req_ins_tail(obj->executor, exec_req);
 343         } else {
 344                 env.major = FORB_EX_NO_MEMORY;
 345                 ul_logerr("No memory for executor request\n");
 346                 goto send_execption;
 347         }
 348
 349 out:
 350         return;
 351
 352 send_execption:
 353         FORB_CDR_codec_init_static(&reply_codec, codec->orb);
 354         ret = FORB_CDR_buffer_init(&reply_codec, 4096,
 355                               forb_iop_MESSAGE_HEADER_SIZE +
 356                               forb_iop_REPLY_HEADER_SIZE);
 357         if (!ret) {
 358                 ul_logerr("No memory for exception reply buffer\n");
 359                 return;
 360         }
 361
 362         forb_iop_send_reply(port->forb, &request_header.source,
 363                             &reply_codec, request_header.request_id, &env);
 364         FORB_CDR_codec_release_buffer(&reply_codec);
 365         /* TODO: relese exec_req etc. */
 366 }
 367
 368 static void
 369 process_reply(forb_port_t *port, FORB_CDR_Codec *codec)
 370 {
 371         forb_iop_reply_header rh;
 372         forb_t *forb = port->forb;
 373         forb_request_t *req;
 374
 375         forb_iop_reply_header_deserialize(codec, &rh);
 376         /* Reply data are 8 byte aligned */
 377         FORB_CDR_get_align(codec, 8);
 378         ul_logdeb("rcvd reply: id=%u\n", rh.request_id);
 379         req = forb_request_find(forb, &rh.request_id);
 380         if (!req) {
 381                 ul_logerr("Received reply to unknown request_id %u\n", rh.request_id);
 382                 return;
 383         }
 384         forb_request_delete(forb, req); /* Deregister request from forb */
 385
 386         if (rh.flags & forb_iop_FLAG_EXCEPTION) {
 387                 forb_exception_deserialize(codec, req->env);
 388         } else {
 389                 req->cdr_reply = codec;
 390         }
 391
 392         /* Tell the stub where to signal that reply processing is
 393          * finished */
 394         req->reply_processed = &port->reply_processed;
 395
 396         /* Resume the stub waiting in forb_wait_for_reply() */
 397         forb_syncobj_signal(&req->reply_ready);
 398
 399         /* Wait for stub to process the results from the codec's buffer */
 400         forb_syncobj_wait(&port->reply_processed);
 401 }
 402
 403 /**
 404  * Process incomming HELLO messages.
 405  *
 406  * For every incomming HELLO message the peer table is searched
 407  * whether it already contains a record for that peer or not. If not,
 408  * the new peer is added to the table and another hello message is
 409  * sent so that the new peer discovers us quickly.
 410  *
 411  * @param port Port, where hello was received
 412  * @param codec Buffer with the hello message
 413  */
 414 static void
 415 process_hello(forb_port_t *port, FORB_CDR_Codec *codec)
 416 {
 417         forb_server_id server_id;
 418         void *addr = NULL;
 419         forb_peer_t *peer;
 420         forb_t *forb = port->forb;
 421         CORBA_string peer_orb_id = NULL;
 422
 423 /*      printf("Hello received at port %p\n", port); */
 424
 425         forb_server_id_deserialize(codec, &server_id);
 426         if (port->desc.proto->deserialize_addr) {
 427                 port->desc.proto->deserialize_addr(codec, &addr);
 428         }
 429         {
 430                 char str[60], addrstr[60];
 431                 if (port->desc.proto->addr2str) {
 432                         port->desc.proto->addr2str(addrstr, sizeof(addrstr), addr);
 433                 } else
 434                         addrstr[0] = 0;
 435                 ul_logdeb("rcvd hello from %s (addr %s)\n",
 436                           forb_server_id_to_string(str, &server_id, sizeof(str)),
 437                           addrstr);
 438         }
 439         CORBA_string_deserialize(codec, &peer_orb_id);
 440         if (forb_server_id_cmp(&server_id, &forb->server_id) != 0) {
 441                 peer = forb_peer_find(forb, &server_id);
 442                 if (peer && peer->state == FORB_PEER_DISCOVERED) {
 443                         /* TODO: Update last hello receive time */
 444                         if (addr)
 445                                 forb_free(addr);
 446                         if (peer_orb_id)
 447                                 forb_free(peer_orb_id);
 448                         forb_peer_put(peer);
 449                 } else {
 450                         forb_new_peer_discovered(port, peer, server_id, addr, peer_orb_id);
 451                 }
 452         }
 453 }
 454
 455 static void
 456 process_message(forb_port_t *port, const forb_iop_message_header *mh,
 457                 FORB_CDR_Codec *codec)
 458 {
 459         CORBA_long data_size = FORB_CDR_data_size(codec);
 460         /* TODO: Check destination address, whether the message is for
 461          * us or should be routed. */
 462
 463         /* TODO: If there is some processing error, skip the rest of
 464          * the message according mh.message_size. */
 465         switch (mh->message_type) {
 466                 case forb_iop_REQUEST:
 467                         process_request(port, codec, mh->message_size);
 468                         break;
 469                 case forb_iop_REPLY:
 470                         process_reply(port, codec);
 471                         break;
 472                 case forb_iop_HELLO:
 473                         process_hello(port, codec);
 474                         break;
 475                 default:
 476                         ul_logmsg("rcvd unknown message type\n");
 477                         break;
 478         }
 479         if (port->new_peer) {
 480                 /* If for some reaseon the new_peer was not processed so free it here. */
 481                 ul_logmsg("Forgotten new_peer\n");
 482                 forb_peer_put(port->new_peer);
 483                 port->new_peer = NULL;
 484         }
 485         if (FORB_CDR_data_size(codec) != data_size - mh->message_size) {
 486                 size_t processed = data_size - FORB_CDR_data_size(codec);
 487                 ul_logmsg("Message of type %d handled incorrectly (size=%d, processed=%d); fixing\n",
 488                           mh->message_type, mh->message_size, processed);
 489                 ;
 490                 codec->rptr += mh->message_size - processed;
 491         }
 492 }
 493
 494 /**
 495  * Thread run for every port to receive FORB messages from that port.
 496  *
 497  * @param arg Pointer to ::forb_port_t typecasted to void *.
 498  *
 499  * @return Always NULL
 500  */
 501 void *forb_iop_receiver_thread(void *arg)
 502 {
 503         forb_port_t *port = arg;
 504         const forb_proto_t *proto = port->desc.proto;
 505         FORB_CDR_Codec *c = &port->codec;
 506         ssize_t rcvd;
 507         size_t len;
 508         forb_iop_message_header mh;
 509         bool header_received = false;
 510
 511         while (!port->finish) {
 512                 if (c->rptr == c->wptr) {
 513                         /* The buffer is empty now - start writing from begining*/
 514                         FORB_CDR_buffer_reset(c, 0);
 515                 }
 516                 /* TODO: If there is not enough space for reception,
 517                  * we should shift the already received data to the
 518                  * beginning of the buffer. */
 519                 rcvd = proto->recv(port,
 520                                    &c->buffer[c->wptr],
 521                                    c->wptr_max - c->wptr);
 522                 if (rcvd < 0) {
 523                         ul_logmsg("recv returned error %d\n", rcvd);
 524                         return NULL;
 525                 }
 526                 c->wptr += rcvd;
 527                 c->wptr_last = c->wptr;
 528
 529                 /* While there are some data in the buffer, process them. */
 530                 while (FORB_CDR_data_size(c) > 0) {
 531                         len = FORB_CDR_data_size(c);
 532                         /* Wait for and then process message header */
 533                         if (!header_received) {
 534                                 if (len >= forb_iop_MESSAGE_HEADER_SIZE) {
 535                                         if (c->rptr % 8 != 0) {
 536                                                 ul_logerr("Header doesn't start at 8 byte bounday\n");
 537                                         }
 538                                         header_received = forb_iop_process_message_header(&mh, c);
 539                                         len = FORB_CDR_data_size(c);
 540                                 } else {
 541                                         break; /* Wait for more data to arrive*/
 542                                 }
 543                         }
 544
 545                         /* Wait for and then process the message body */
 546                         if (header_received) {
 547                                 if (len >= mh.message_size) {
 548                                         process_message(port, &mh, c);
 549                                         /* Wait for the next message */
 550                                         header_received = false;
 551                                 } else {
 552                                         break; /* Wait for more data to arrive*/
 553                                 }
 554                         }
 555                 }
 556         }
 557         return NULL;
 558 }
 559
 560 static void
 561 discovery_cleanup(void *codec)
 562 {
 563         FORB_CDR_codec_release_buffer((FORB_CDR_Codec*)codec);
 564         /* TODO: Broadcast some kind of bye bye message */
 565 }
 566
 567
 568 /**
 569  * Thread run for every port to broadcast HELLO messages. These
 570  * messages are used for a FORB to discover all peers (and in future
 571  * also to detect their disconnection).
 572  *
 573  * @param arg Pointer to ::forb_port_t typecasted to void *.
 574  *
 575  * @return Always NULL
 576  */
 577 void *forb_iop_discovery_thread(void *arg)
 578 {
 579         forb_port_t *port = arg;
 580         const forb_proto_t *proto = port->desc.proto;
 581         FORB_CDR_Codec codec;
 582         fosa_abs_time_t hello_time;
 583         fosa_rel_time_t hello_interval = fosa_msec_to_rel_time(1000*proto->hello_interval);
 584         int ret;
 585
 586         FORB_CDR_codec_init_static(&codec, port->forb->orb);
 587         FORB_CDR_buffer_init(&codec, 1024, 0);
 588
 589         pthread_cleanup_push(discovery_cleanup, &codec);
 590
 591         /* Next hello interval is now */
 592         fosa_clock_get_time(FOSA_CLOCK_ABSOLUTE, &hello_time);
 593
 594         while (!port->finish) {
 595                 /* Wait for next hello interval or until somebody
 596                  * signals us. */
 597                 ret = forb_syncobj_timedwait(&port->hello, &hello_time);
 598                 /* sem_timedwait would be more appropriate */
 599                 if (ret == FOSA_ETIMEDOUT) {
 600                         hello_time = fosa_abs_time_incr(hello_time, hello_interval);
 601                 } else if (ret != 0) {
 602                         ul_logerr("hello syncobj error: %s\n", strerror(ret));
 603                 }
 604
 605                 if (port->finish) break;
 606
 607                 FORB_CDR_buffer_reset(&codec, forb_iop_MESSAGE_HEADER_SIZE);
 608                 forb_iop_prepare_hello(&codec, &port->forb->server_id, port->desc.addr,
 609                                        proto->serialize_addr, port->forb->attr.orb_id);
 610 /*              printf("Broadcasting hello from port %p\n", port);  */
 611                 proto->broadcast(port, &codec.buffer[codec.rptr],
 612                                  FORB_CDR_data_size(&codec));
 613         }
 614
 615         pthread_cleanup_pop(1);
 616         return NULL;
 617 }
 618
 619 /**
 620  * Sends REQUEST message to another FORB.
 621  *
 622  * The request @a req has to be prepared by
 623  * forb_iop_prepare_request(). Then, this function adds a message
 624  * header, connects to the destination FORB and sends the request.
 625  *
 626  * If no exception is reported, then the caller must wait for response
 627  * by calling forb_wait_for_reply().
 628  *
 629  * @param req A request prepared by forb_iop_prepare_request()
 630  * @param env Environment for returning exceptions
 631  */
 632 void
 633 forb_request_send(forb_request_t *req, CORBA_Environment *env)
 634 {
 635         CORBA_boolean ret;
 636         forb_peer_t *peer;
 637         ssize_t size;
 638         size_t len;
 639         fosa_abs_time_t timeout;
 640         forb_t *forb = forb_object_to_forb(req->obj);
 641
 642         if (!forb) {
 643                 env->major = FORB_EX_INTERNAL;
 644                 return;
 645         }
 646
 647         req->env = env;     /* Remember, where to return exceptions */
 648
 649         ret = forb_iop_prepend_message_header(&req->cdr_request, forb_iop_REQUEST);
 650         if (!ret) {
 651                 /* This should never happen */
 652                 env->major = FORB_EX_INTERNAL;
 653                 return;
 654         }
 655
 656         fosa_clock_get_time(FOSA_CLOCK_ABSOLUTE, &timeout);
 657         timeout = fosa_abs_time_incr(timeout,
 658                                      fosa_msec_to_rel_time(1000));
 659         peer = forb_get_next_hop(forb, &req->obj->server, &timeout);
 660         if (!peer) {
 661                 char str[50];
 662                 ul_logerr("Cannot find peer to send request for server %s\n",
 663                           forb_server_id_to_string(str, &req->obj->server, sizeof(str)));
 664                 env->major = FORB_EX_COMM_FAILURE;
 665                 return;
 666         }
 667         /* Register the request with forb so we can match incomming
 668          * reply to this request. */
 669         ret = forb_request_insert(forb, req);
 670         if (ret <= 0) {
 671                 ul_logerr("Insert request error %d\n", ret);
 672                 env->major = FORB_EX_INTERNAL;
 673                 goto err_peer_put;
 674         }
 675
 676         {
 677                 char str[50];
 678                 ul_logdeb("sending request: id=%d  dest=%s\n", req->request_id,
 679                           forb_server_id_to_string(str, &req->obj->server, sizeof(str)));
 680         }
 681         len = FORB_CDR_data_size(&req->cdr_request);
 682         fosa_mutex_lock(&peer->send_lock);
 683         size = forb_proto_send(peer, &req->cdr_request);
 684         fosa_mutex_unlock(&peer->send_lock);
 685         if (size <= 0 || size != len) {
 686                 env->major = FORB_EX_COMM_FAILURE;
 687                 /* Request is deleted when the stub calls forb_request_destroy() */
 688         }
 689  err_peer_put:
 690         forb_peer_put(peer);
 691 }