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                                         ul_logerr("rcvd wrong message type: %d\n",
 153                                                   mh->message_type);
 154                                         return false;
 155                         }
 156                         codec->data_endian = (mh->flags && forb_iop_LITTLE_ENDIAN) ?
 157                                 LittleEndian : BigEndian;
 158                         CORBA_unsigned_long_deserialize(codec, &mh->message_size);
 159                         return true;
 160                         break;
 161                 default:
 162                         ul_logerr("rcvd wrong protocol versio: %d.%d\n",
 163                                   mh->proto_version.major, mh->proto_version.minor);
 164                         return false;
 165         }
 166 }
 167
 168 static inline CORBA_boolean
 169 forb_exception_serialize(FORB_CDR_Codec *codec, struct forb_env *env)
 170 {
 171         return CORBA_long_serialize(codec, &env->major);
 172 }
 173
 174 static inline CORBA_boolean
 175 forb_exception_deserialize(FORB_CDR_Codec *codec, struct forb_env *env)
 176 {
 177         /* TODO: Declare exceptions in IDL and don't typecast here. */
 178         return CORBA_long_deserialize(codec, (CORBA_long*)&env->major);
 179 }
 180
 181 void
 182 forb_iop_send_reply(forb_t *forb,
 183            forb_server_id *dest,
 184            FORB_CDR_Codec *codec,
 185            CORBA_long request_id,
 186            struct forb_env *env)
 187 {
 188         forb_iop_reply_header reply_header;
 189         CORBA_boolean ret;
 190         forb_peer_t *peer;
 191         fosa_abs_time_t timeout;
 192
 193         reply_header.request_id = request_id;
 194         reply_header.flags = 0;
 195         if (forb_exception_occurred(env)) {
 196                 reply_header.flags |= forb_iop_FLAG_EXCEPTION;
 197                 FORB_CDR_buffer_reset(codec, forb_iop_MESSAGE_HEADER_SIZE +
 198                                              forb_iop_REPLY_HEADER_SIZE);
 199                 forb_exception_serialize(codec, env);
 200         }
 201         /* forb_iop_REPLY_HEADER_SIZE equals to 8 even if the real
 202          * header is shorter. We want reply data to be 8 byte
 203          * aligned */
 204         ret = FORB_CDR_buffer_prepend(codec, forb_iop_REPLY_HEADER_SIZE);
 205         if (!ret) {
 206                 goto err;
 207         }
 208         ret = forb_iop_reply_header_serialize(codec, &reply_header);
 209         if (!ret) {
 210                 goto err;
 211         }
 212         forb_iop_prepend_message_header(codec, forb_iop_REPLY);
 213
 214         fosa_clock_get_time(FOSA_CLOCK_ABSOLUTE, &timeout);
 215         timeout = fosa_abs_time_incr(timeout,
 216                                      fosa_msec_to_rel_time(1000));
 217
 218         peer = forb_get_next_hop(forb, dest, &timeout);
 219         if (!peer) {
 220                 char str[60];
 221                 forb_server_id_to_string(str, dest, sizeof(str));
 222                 ul_logerr("Reply destination not found: %s\n", str);
 223                 goto err;
 224         } else {
 225                 char str[60];
 226                 forb_server_id_to_string(str, dest, sizeof(str));
 227                 ul_logdeb("sending reply: dest=%s, id=%u\n", str, request_id);
 228         }
 229         forb_proto_send(peer, codec);
 230         forb_peer_put(peer);
 231 err:
 232         ;
 233 }
 234
 235 static void
 236 process_request(forb_port_t *port, FORB_CDR_Codec *codec, uint32_t message_size)
 237 {
 238         forb_iop_request_header request_header;
 239         CORBA_boolean ret;
 240         forb_object obj;
 241         size_t n;
 242         forb_t *forb = port->forb;
 243         struct forb_env env;
 244         FORB_CDR_Codec reply_codec;
 245         forb_exec_req_t *exec_req;
 246         uint32_t req_size, data_size, header_size;
 247         char str[32];
 248         forb_peer_t *peer;
 249
 250         data_size = FORB_CDR_data_size(codec);
 251         ret = forb_iop_request_header_deserialize(codec, &request_header);
 252         if (!ret) {
 253                 ul_logerr("Malformed request recevied\n");
 254                 env.major = FORB_EX_COMM_FAILURE;
 255                 goto out;
 256         }
 257         ret = FORB_CDR_get_align(codec, 8);
 258         if (!ret) {
 259                 ul_logerr("Malformed request recevied\n");
 260                 env.major = FORB_EX_COMM_FAILURE;
 261                 goto out;
 262         }
 263
 264         header_size = data_size - FORB_CDR_data_size(codec);
 265         req_size = message_size - header_size;
 266
 267         ul_logdeb("rcvd request: src=%s, id=%u, iface=%s, method=%hd\n",
 268                   forb_server_id_to_string(str, &request_header.source, sizeof(str)),
 269                   request_header.request_id,
 270                   request_header.iface,
 271                   request_header.method_index);
 272
 273         if (port->new_peer) {
 274                 /* Request from a new peer was reported by the underlaying protocol */
 275                 peer = forb_peer_find(port->forb, &request_header.source);
 276                 if (peer) {
 277                         /* We already know this peer */
 278                         /* TODO: Can it be in FORB_PEER_WANTED state?
 279                          * If yes, we cannot simply igore this. */
 280                         ul_logmsg("new_peer was already known\n");
 281                         forb_peer_put(port->new_peer);
 282                         port->new_peer = NULL;
 283                 } else {
 284                         ul_logdeb("discovered new_peer from incomming connection\n");
 285                         peer = port->new_peer;
 286                         port->new_peer = NULL;
 287                         forb_new_peer_discovered(port, peer, request_header.source,
 288                                                  peer->addr, peer->orb_id);
 289                 }
 290
 291         }
 292
 293         obj = forb_key_to_object(forb, request_header.objkey);
 294         if (!obj) {
 295                 ul_logerr("Nonexistent object key\n");
 296                 env.major = FORB_EX_OBJECT_NOT_EXIST;
 297                 goto send_execption;
 298         }
 299
 300         n = strlen(request_header.iface);
 301         ret = strncmp(request_header.iface, obj->interface->name, n);
 302         forb_free(request_header.iface);
 303         request_header.iface = NULL;
 304         if (ret != 0) {
 305                 env.major = FORB_EX_INV_OBJREF;
 306                 ul_logerr("Object reference has incorrect type\n");
 307                 goto send_execption;
 308         }
 309
 310         if (request_header.method_index >= obj->interface->num_methods) {
 311                 env.major = FORB_EX_INV_IDENT;
 312                 ul_logerr("To high method number\n");
 313                 goto send_execption;
 314         }
 315
 316         if (!obj->executor) {
 317                 env.major = FORB_EX_NO_IMPLEMENT;
 318                 ul_logerr("No executor for object\n");
 319                 goto send_execption;
 320
 321         }
 322
 323         /* Enqueue execution request */
 324         exec_req = forb_malloc(sizeof(*exec_req));
 325         if (exec_req) {
 326                 memset(exec_req, 0, sizeof(exec_req));
 327                 exec_req->request_id = request_header.request_id;
 328                 exec_req->source = request_header.source;
 329                 exec_req->obj = obj;
 330                 exec_req->method_index = request_header.method_index;
 331                 /* Copy the request to exec_req */
 332                 FORB_CDR_codec_init_static(&exec_req->codec, codec->orb);
 333                 ret = FORB_CDR_buffer_init(&exec_req->codec,
 334                                       req_size,
 335                                       0);
 336                 if (!ret) {
 337                         env.major = FORB_EX_NO_MEMORY;
 338                         ul_logerr("No memory for executor request bufer of size %d (header_size=%d)\n",
 339                                   req_size, header_size);
 340                         goto send_execption;
 341                 }
 342                 exec_req->codec.data_endian = codec->data_endian;
 343                 FORB_CDR_buffer_gets(codec, exec_req->codec.buffer, req_size);
 344                 /* TODO: Use better data structure for incomming
 345                    buffer to achieve zero-copy behaviour. */
 346                 forb_exec_req_ins_tail(obj->executor, exec_req);
 347         } else {
 348                 env.major = FORB_EX_NO_MEMORY;
 349                 ul_logerr("No memory for executor request\n");
 350                 goto send_execption;
 351         }
 352
 353 out:
 354         return;
 355
 356 send_execption:
 357         FORB_CDR_codec_init_static(&reply_codec, codec->orb);
 358         ret = FORB_CDR_buffer_init(&reply_codec, 4096,
 359                               forb_iop_MESSAGE_HEADER_SIZE +
 360                               forb_iop_REPLY_HEADER_SIZE);
 361         if (!ret) {
 362                 ul_logerr("No memory for exception reply buffer\n");
 363                 return;
 364         }
 365
 366         forb_iop_send_reply(port->forb, &request_header.source,
 367                             &reply_codec, request_header.request_id, &env);
 368         FORB_CDR_codec_release_buffer(&reply_codec);
 369         /* TODO: relese exec_req etc. */
 370 }
 371
 372 static void
 373 process_reply(forb_port_t *port, FORB_CDR_Codec *codec)
 374 {
 375         forb_iop_reply_header rh;
 376         forb_t *forb = port->forb;
 377         forb_request_t *req;
 378
 379         forb_iop_reply_header_deserialize(codec, &rh);
 380         /* Reply data are 8 byte aligned */
 381         FORB_CDR_get_align(codec, 8);
 382         ul_logdeb("rcvd reply: id=%u\n", rh.request_id);
 383         req = forb_request_find(forb, &rh.request_id);
 384         if (!req) {
 385                 ul_logerr("Received reply to unknown request_id %u\n", rh.request_id);
 386                 return;
 387         }
 388         forb_request_delete(forb, req); /* Deregister request from forb */
 389
 390         if (rh.flags & forb_iop_FLAG_EXCEPTION) {
 391                 forb_exception_deserialize(codec, req->env);
 392         } else {
 393                 req->cdr_reply = codec;
 394         }
 395
 396         /* Tell the stub where to signal that reply processing is
 397          * finished */
 398         req->reply_processed = &port->reply_processed;
 399
 400         /* Resume the stub waiting in forb_wait_for_reply() */
 401         forb_syncobj_signal(&req->reply_ready);
 402
 403         /* Wait for stub to process the results from the codec's buffer */
 404         forb_syncobj_wait(&port->reply_processed);
 405 }
 406
 407 /**
 408  * Process incomming HELLO messages.
 409  *
 410  * For every incomming HELLO message the peer table is searched
 411  * whether it already contains a record for that peer or not. If not,
 412  * the new peer is added to the table and another hello message is
 413  * sent so that the new peer discovers us quickly.
 414  *
 415  * @param port Port, where hello was received
 416  * @param codec Buffer with the hello message
 417  */
 418 static void
 419 process_hello(forb_port_t *port, FORB_CDR_Codec *codec)
 420 {
 421         forb_server_id server_id;
 422         void *addr = NULL;
 423         forb_peer_t *peer;
 424         forb_t *forb = port->forb;
 425         CORBA_string peer_orb_id = NULL;
 426
 427 /*      printf("Hello received at port %p\n", port); */
 428
 429         forb_server_id_deserialize(codec, &server_id);
 430         if (port->desc.proto->deserialize_addr) {
 431                 port->desc.proto->deserialize_addr(codec, &addr);
 432         }
 433         {
 434                 char str[60], addrstr[60];
 435                 if (port->desc.proto->addr2str) {
 436                         port->desc.proto->addr2str(addrstr, sizeof(addrstr), addr);
 437                 } else
 438                         addrstr[0] = 0;
 439                 ul_logdeb("rcvd hello from %s (addr %s)\n",
 440                           forb_server_id_to_string(str, &server_id, sizeof(str)),
 441                           addrstr);
 442         }
 443         CORBA_string_deserialize(codec, &peer_orb_id);
 444         if (forb_server_id_cmp(&server_id, &forb->server_id) != 0) {
 445                 peer = forb_peer_find(forb, &server_id);
 446                 if (peer && peer->state == FORB_PEER_DISCOVERED) {
 447                         /* TODO: Update last hello receive time */
 448                         if (addr)
 449                                 forb_free(addr);
 450                         if (peer_orb_id)
 451                                 forb_free(peer_orb_id);
 452                         forb_peer_put(peer);
 453                 } else {
 454                         forb_new_peer_discovered(port, peer, server_id, addr, peer_orb_id);
 455                 }
 456         }
 457 }
 458
 459 static void
 460 process_message(forb_port_t *port, const forb_iop_message_header *mh,
 461                 FORB_CDR_Codec *codec)
 462 {
 463         CORBA_long data_size = FORB_CDR_data_size(codec);
 464         /* TODO: Check destination address, whether the message is for
 465          * us or should be routed. */
 466
 467         /* TODO: If there is some processing error, skip the rest of
 468          * the message according mh.message_size. */
 469         switch (mh->message_type) {
 470                 case forb_iop_REQUEST:
 471                         process_request(port, codec, mh->message_size);
 472                         break;
 473                 case forb_iop_REPLY:
 474                         process_reply(port, codec);
 475                         break;
 476                 case forb_iop_HELLO:
 477                         process_hello(port, codec);
 478                         break;
 479                 default:
 480                         ul_logmsg("rcvd unknown message type\n");
 481                         break;
 482         }
 483         if (port->new_peer) {
 484                 /* If for some reaseon the new_peer was not processed so free it here. */
 485                 ul_logmsg("Forgotten new_peer\n");
 486                 forb_peer_put(port->new_peer);
 487                 port->new_peer = NULL;
 488         }
 489         if (FORB_CDR_data_size(codec) != data_size - mh->message_size) {
 490                 size_t processed = data_size - FORB_CDR_data_size(codec);
 491                 ul_logmsg("Message of type %d handled incorrectly (size=%d, processed=%d); fixing\n",
 492                           mh->message_type, mh->message_size, processed);
 493                 ;
 494                 codec->rptr += mh->message_size - processed;
 495         }
 496 }
 497
 498 /**
 499  * Thread run for every port to receive FORB messages from that port.
 500  *
 501  * @param arg Pointer to ::forb_port_t typecasted to void *.
 502  *
 503  * @return Always NULL
 504  */
 505 void *forb_iop_receiver_thread(void *arg)
 506 {
 507         forb_port_t *port = arg;
 508         const forb_proto_t *proto = port->desc.proto;
 509         FORB_CDR_Codec *c = &port->codec;
 510         ssize_t rcvd;
 511         size_t len;
 512         forb_iop_message_header mh;
 513         bool header_received = false;
 514
 515         while (!port->finish) {
 516                 if (c->rptr == c->wptr) {
 517                         /* The buffer is empty now - start writing from begining*/
 518                         FORB_CDR_buffer_reset(c, 0);
 519                 }
 520                 /* TODO: If there is not enough space for reception,
 521                  * we should shift the already received data to the
 522                  * beginning of the buffer. */
 523                 rcvd = proto->recv(port,
 524                                    &c->buffer[c->wptr],
 525                                    c->wptr_max - c->wptr);
 526                 if (rcvd < 0) {
 527                         ul_logerr("recv returned error %d (%s), exiting\n", rcvd, strerror(errno));
 528                         return NULL;
 529                 }
 530                 c->wptr += rcvd;
 531                 c->wptr_last = c->wptr;
 532
 533                 /* While there are some data in the buffer, process them. */
 534                 while (FORB_CDR_data_size(c) > 0) {
 535                         len = FORB_CDR_data_size(c);
 536                         /* Wait for and then process message header */
 537                         if (!header_received) {
 538                                 if (len >= forb_iop_MESSAGE_HEADER_SIZE) {
 539                                         if (c->rptr % 8 != 0) {
 540                                                 ul_logerr("Header doesn't start at 8 byte bounday\n");
 541                                         }
 542                                         header_received = forb_iop_process_message_header(&mh, c);
 543                                         if (!header_received) {
 544                                                 ul_logerr("Wrong header received\n");
 545                                                 /* TODO: We should probably reset the buffer here */
 546                                         }
 547                                         len = FORB_CDR_data_size(c);
 548                                 } else {
 549                                         break; /* Wait for more data to arrive*/
 550                                 }
 551                         }
 552
 553                         /* Wait for and then process the message body */
 554                         if (header_received) {
 555                                 if (len >= mh.message_size) {
 556                                         process_message(port, &mh, c);
 557                                         /* Wait for the next message */
 558                                         header_received = false;
 559                                 } else {
 560                                         break; /* Wait for more data to arrive*/
 561                                 }
 562                         }
 563                 }
 564         }
 565         return NULL;
 566 }
 567
 568 static void
 569 discovery_cleanup(void *codec)
 570 {
 571         FORB_CDR_codec_release_buffer((FORB_CDR_Codec*)codec);
 572         /* TODO: Broadcast some kind of bye bye message */
 573 }
 574
 575
 576 /**
 577  * Thread run for every port to broadcast HELLO messages. These
 578  * messages are used for a FORB to discover all peers (and in future
 579  * also to detect their disconnection).
 580  *
 581  * @param arg Pointer to ::forb_port_t typecasted to void *.
 582  *
 583  * @return Always NULL
 584  */
 585 void *forb_iop_discovery_thread(void *arg)
 586 {
 587         forb_port_t *port = arg;
 588         const forb_proto_t *proto = port->desc.proto;
 589         FORB_CDR_Codec codec;
 590         fosa_abs_time_t hello_time;
 591         fosa_rel_time_t hello_interval = fosa_msec_to_rel_time(1000*proto->hello_interval);
 592         int ret;
 593
 594         FORB_CDR_codec_init_static(&codec, port->forb->orb);
 595         FORB_CDR_buffer_init(&codec, 1024, 0);
 596
 597         pthread_cleanup_push(discovery_cleanup, &codec);
 598
 599         /* Next hello interval is now */
 600         fosa_clock_get_time(FOSA_CLOCK_ABSOLUTE, &hello_time);
 601
 602         while (!port->finish) {
 603                 /* Wait for next hello interval or until somebody
 604                  * signals us. */
 605                 ret = forb_syncobj_timedwait(&port->hello, &hello_time);
 606                 /* sem_timedwait would be more appropriate */
 607                 if (ret == FOSA_ETIMEDOUT) {
 608                         hello_time = fosa_abs_time_incr(hello_time, hello_interval);
 609                 } else if (ret != 0) {
 610                         ul_logerr("hello syncobj error: %s\n", strerror(ret));
 611                 }
 612
 613                 if (port->finish) break;
 614
 615                 FORB_CDR_buffer_reset(&codec, forb_iop_MESSAGE_HEADER_SIZE);
 616                 forb_iop_prepare_hello(&codec, &port->forb->server_id, port->desc.addr,
 617                                        proto->serialize_addr, port->forb->attr.orb_id);
 618 /*              printf("Broadcasting hello from port %p\n", port);  */
 619                 proto->broadcast(port, &codec.buffer[codec.rptr],
 620                                  FORB_CDR_data_size(&codec));
 621         }
 622
 623         pthread_cleanup_pop(1);
 624         return NULL;
 625 }
 626
 627 /**
 628  * Sends REQUEST message to another FORB.
 629  *
 630  * The request @a req has to be prepared by
 631  * forb_iop_prepare_request(). Then, this function adds a message
 632  * header, connects to the destination FORB and sends the request.
 633  *
 634  * If no exception is reported, then the caller must wait for response
 635  * by calling forb_wait_for_reply().
 636  *
 637  * @param req A request prepared by forb_iop_prepare_request()
 638  * @param env Environment for returning exceptions
 639  */
 640 void
 641 forb_request_send(forb_request_t *req, CORBA_Environment *env)
 642 {
 643         CORBA_boolean ret;
 644         forb_peer_t *peer;
 645         ssize_t size;
 646         size_t len;
 647         fosa_abs_time_t timeout;
 648         forb_t *forb = forb_object_to_forb(req->obj);
 649
 650         if (!forb) {
 651                 env->major = FORB_EX_INTERNAL;
 652                 return;
 653         }
 654
 655         req->env = env;     /* Remember, where to return exceptions */
 656
 657         ret = forb_iop_prepend_message_header(&req->cdr_request, forb_iop_REQUEST);
 658         if (!ret) {
 659                 /* This should never happen */
 660                 env->major = FORB_EX_INTERNAL;
 661                 return;
 662         }
 663
 664         fosa_clock_get_time(FOSA_CLOCK_ABSOLUTE, &timeout);
 665         timeout = fosa_abs_time_incr(timeout,
 666                                      fosa_msec_to_rel_time(1000));
 667         peer = forb_get_next_hop(forb, &req->obj->server, &timeout);
 668         if (!peer) {
 669                 char str[50];
 670                 ul_logerr("Cannot find peer to send request for server %s\n",
 671                           forb_server_id_to_string(str, &req->obj->server, sizeof(str)));
 672                 env->major = FORB_EX_COMM_FAILURE;
 673                 return;
 674         }
 675         /* Register the request with forb so we can match incomming
 676          * reply to this request. */
 677         ret = forb_request_insert(forb, req);
 678         if (ret <= 0) {
 679                 ul_logerr("Insert request error %d\n", ret);
 680                 env->major = FORB_EX_INTERNAL;
 681                 goto err_peer_put;
 682         }
 683
 684         {
 685                 char str[50];
 686                 ul_logdeb("sending request: id=%d  dest=%s\n", req->request_id,
 687                           forb_server_id_to_string(str, &req->obj->server, sizeof(str)));
 688         }
 689         len = FORB_CDR_data_size(&req->cdr_request);
 690         fosa_mutex_lock(&peer->send_lock);
 691         size = forb_proto_send(peer, &req->cdr_request);
 692         fosa_mutex_unlock(&peer->send_lock);
 693         if (size <= 0 || size != len) {
 694                 env->major = FORB_EX_COMM_FAILURE;
 695                 /* Request is deleted when the stub calls forb_request_destroy() */
 696         }
 697  err_peer_put:
 698         forb_peer_put(peer);
 699 }