port.cpp

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** PBX4Linux                                                                 **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** port                                                                      **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 /* HOW TO audio?
  13
  14 Audio flow has two ways:
  15
  16 * from channel to the upper layer
  17   -> sound from mISDN channel
  18   -> announcement from vbox channel
  19
  20 * from the upper layer to the channel
  21   -> sound from remote channel
  22
  23 Audio is required:
  24
  25   -> if local or remote channel is not mISDN
  26   -> if call is recorded (vbox)
  27
  28
  29 Functions:
  30
  31 * PmISDN::txfromup
  32   -> audio from upper layer is buffered for later transmission to channel
  33 * PmISDN::handler
  34   -> buffered audio from upper layer or tones are transmitted via system clock
  35 * mISDN_handler
  36   -> rx-data from port to record() and upper layer
  37   -> tx-data from port (dsp) to record()
  38 * VboxPort::handler
  39   -> streaming announcement to upper layer
  40   -> recording announcement
  41 * VboxPort::message_epoint
  42   -> recording audio message from upper layer
  43
  44
  45
  46 */
  47
  48 #include "main.h"
  49
  50 /* enable to test conference mixing, even if only two members are bridged */
  51 //#define TEST_CONFERENCE 1
  52
  53 #define SHORT_MIN -32768
  54 #define SHORT_MAX 32767
  55
  56 class Port *port_first = NULL;
  57
  58 unsigned int port_serial = 1; /* must be 1, because 0== no port */
  59
  60 struct port_bridge *p_bridge_first;
  61
  62 static void remove_bridge(struct port_bridge *bridge, class Port *port);
  63
  64 /* free epointlist relation
  65  */
  66 void Port::free_epointlist(struct epoint_list *epointlist)
  67 {
  68         struct epoint_list *temp, **tempp;
  69
  70         temp = p_epointlist;
  71         tempp = &p_epointlist;
  72         while(temp) {
  73                 if (temp == epointlist)
  74                         break;
  75
  76                 tempp = &temp->next;
  77                 temp = temp->next;
  78         }
  79         if (temp == 0) {
  80                 PERROR("SOFTWARE ERROR: epointlist not in port's list.\n");
  81                 return;
  82         }
  83         /* detach */
  84         *tempp=temp->next;
  85
  86         /* free */
  87         PDEBUG(DEBUG_EPOINT, "PORT(%d) removed epoint from port\n", p_serial);
  88         FREE(temp, sizeof(struct epoint_list));
  89         ememuse--;
  90 }
  91
  92
  93 void Port::free_epointid(unsigned int epoint_id)
  94 {
  95         struct epoint_list *temp, **tempp;
  96
  97         temp = p_epointlist;
  98         tempp = &p_epointlist;
  99         while(temp) {
 100                 if (temp->epoint_id == epoint_id)
 101                         break;
 102
 103                 tempp = &temp->next;
 104                 temp = temp->next;
 105         }
 106         if (temp == 0) {
 107                 PERROR("epoint_id not in port's list.\n");
 108                 return;
 109         }
 110         /* detach */
 111         *tempp=temp->next;
 112
 113         /* free */
 114         PDEBUG(DEBUG_EPOINT, "PORT(%d) removed epoint from port\n", p_serial);
 115         FREE(temp, sizeof(struct epoint_list));
 116         ememuse--;
 117 }
 118
 119
 120 /* create new epointlist relation
 121  */
 122 struct epoint_list *Port::epointlist_new(unsigned int epoint_id)
 123 {
 124         struct epoint_list *epointlist, **epointlistpointer;
 125
 126         /* epointlist structure */
 127         epointlist = (struct epoint_list *)MALLOC(sizeof(struct epoint_list));
 128         if (!epointlist)
 129                 FATAL("No memory for epointlist\n");
 130         ememuse++;
 131         PDEBUG(DEBUG_EPOINT, "PORT(%d) allocating epoint_list.\n", p_serial);
 132
 133         /* add epoint_list to chain */
 134         epointlist->next = NULL;
 135         epointlistpointer = &p_epointlist;
 136         while(*epointlistpointer)
 137                 epointlistpointer = &((*epointlistpointer)->next);
 138         *epointlistpointer = epointlist;
 139
 140         /* link to epoint */
 141         epointlist->epoint_id = epoint_id;
 142         epointlist->active = 1;
 143
 144         return(epointlist);
 145 }
 146
 147
 148 /*
 149  * port constructor
 150  */
 151 Port::Port(int type, const char *portname, struct port_settings *settings, struct interface *interface)
 152 {
 153         class Port *temp, **tempp;
 154
 155         /* initialize object */
 156         if (settings)
 157                 memcpy(&p_settings, settings, sizeof(struct port_settings));
 158         else {
 159                 memset(&p_settings, 0, sizeof(p_settings));
 160         }
 161         SCPY(p_name, portname);
 162         if (interface)
 163                 SCPY(p_interface_name, interface->name);
 164         p_tone_dir[0] = '\0';
 165         p_type = type;
 166         p_serial = port_serial++;
 167         p_tone_fh = -1;
 168         p_tone_fetched = NULL;
 169         p_tone_name[0] = '\0';
 170         p_state = PORT_STATE_IDLE;
 171         p_epointlist = NULL;
 172         memset(&p_callerinfo, 0, sizeof(p_callerinfo));
 173         memset(&p_dialinginfo, 0, sizeof(p_dialinginfo));
 174         memset(&p_connectinfo, 0, sizeof(p_connectinfo));
 175         memset(&p_redirinfo, 0, sizeof(p_redirinfo));
 176         memset(&p_capainfo, 0, sizeof(p_capainfo));
 177         p_echotest = 0;
 178         p_bridge = 0;
 179
 180         /* call recording */
 181         p_record = NULL;
 182         p_tap = 0;
 183         p_record_type = 0;
 184         p_record_length = 0;
 185         p_record_skip = 0;
 186         p_record_filename[0] = '\0';
 187         p_record_buffer_readp = 0;
 188         p_record_buffer_writep = 0;
 189         p_record_buffer_dir = 0;
 190
 191         /* VoOTP */
 192 #ifdef WITH_VOOTP
 193         p_vootp = NULL;
 194 #endif
 195         /* D-O-V */
 196         dov_init();
 197
 198         /* append port to chain */
 199         next = NULL;
 200         temp = port_first;
 201         tempp = &port_first;
 202         while(temp) {
 203                 tempp = &temp->next;
 204                 temp = temp->next;
 205         }
 206         *tempp = this;
 207
 208         classuse++;
 209
 210         PDEBUG(DEBUG_PORT, "new port (%d) of type 0x%x, name '%s' interface '%s'\n", p_serial, type, portname, p_interface_name);
 211 }
 212
 213
 214 /*
 215  * port destructor
 216  */
 217 Port::~Port(void)
 218 {
 219         class Port *temp, **tempp;
 220         struct lcr_msg *message;
 221
 222         PDEBUG(DEBUG_PORT, "removing port (%d) of type 0x%x, name '%s' interface '%s'\n", p_serial, p_type, p_name, p_interface_name);
 223
 224 #ifdef WITH_VOOTP
 225         if (p_vootp) {
 226                 vootp_destroy(p_vootp);
 227                 p_vootp = NULL;
 228         }
 229 #endif
 230
 231         if (p_bridge) {
 232                 PDEBUG(DEBUG_PORT, "Removing us from bridge %u\n", p_bridge->bridge_id);
 233                 remove_bridge(p_bridge, this);
 234         }
 235
 236         if (p_record)
 237                 close_record(0, 0);
 238
 239         dov_exit();
 240
 241         classuse--;
 242
 243         /* disconnect port from endpoint */
 244         while(p_epointlist) {
 245                 /* send disconnect */
 246                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 247                 message->param.disconnectinfo.cause = 16;
 248                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 249                 message_put(message);
 250                 /* remove endpoint */
 251                 free_epointlist(p_epointlist);
 252         }
 253
 254         /* remove port from chain */
 255         temp=port_first;
 256         tempp=&port_first;
 257         while(temp) {
 258                 if (temp == this)
 259                         break;
 260                 tempp = &temp->next;
 261                 temp = temp->next;
 262         }
 263         if (temp == NULL)
 264                 FATAL("PORT(%s) port not in port's list.\n", p_name);
 265         /* detach */
 266         *tempp=this->next;
 267
 268         /* close open tones file */
 269         if (p_tone_fh >= 0) {
 270                 close(p_tone_fh);
 271                 p_tone_fh = -1;
 272                 fhuse--;
 273         }
 274         p_tone_fetched = NULL;
 275 }
 276
 277 PORT_STATE_NAMES
 278
 279 /* set new endpoint state
 280  */
 281 void Port::new_state(int state)
 282 {
 283         PDEBUG(DEBUG_PORT, "PORT(%s) new state %s --> %s\n", p_name, state_name[p_state], state_name[state]);
 284         p_state = state;
 285 }
 286
 287
 288 /*
 289  * find the port with port_id
 290  */
 291 class Port *find_port_id(unsigned int port_id)
 292 {
 293         class Port *port = port_first;
 294
 295         while(port) {
 296 //printf("comparing: '%s' with '%s'\n", name, port->name);
 297                 if (port->p_serial == port_id)
 298                         return(port);
 299                 port = port->next;
 300         }
 301
 302         return(NULL);
 303 }
 304
 305
 306 /*
 307  * set echotest
 308  */
 309 void Port::set_echotest(int echotest)
 310 {
 311         p_echotest = echotest;
 312 }
 313
 314
 315 /*
 316  * set the file in the tone directory with the given name
 317  */
 318 void Port::set_tone(const char *dir, const char *name)
 319 {
 320         int fh;
 321         char filename[128];
 322
 323         if (name == NULL)
 324                 name = "";
 325
 326         if (!dir || !dir[0])
 327                 dir = options.tones_dir; /* just in case we have no PmISDN instance */
 328
 329         /* no counter, no eof, normal speed */
 330         p_tone_counter = 0;
 331         p_tone_eof = 0;
 332         p_tone_speed = 1;
 333         p_tone_codec = CODEC_LAW;
 334
 335         if (p_tone_fh >= 0) {
 336                 close(p_tone_fh);
 337                 p_tone_fh = -1;
 338                 fhuse--;
 339         }
 340         p_tone_fetched = NULL;
 341
 342         if (name[0]) {
 343                 if (name[0] == '/') {
 344                         SPRINT(p_tone_name, "%s", name);
 345                         p_tone_dir[0] = '\0';
 346                 } else {
 347                         SCPY(p_tone_dir, dir);
 348                         SCPY(p_tone_name, name);
 349                 }
 350                 /* trigger playback */
 351                 update_load();
 352         } else {
 353                 p_tone_name[0]= '\0';
 354                 p_tone_dir[0]= '\0';
 355                 return;
 356         }
 357
 358         if (!!strncmp(name,"cause_",6))
 359                 return;
 360
 361         /* now we check if the cause exists, otherwhise we use error tone. */
 362         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, 0, 0))) {
 363                 p_tone_fetched = NULL;
 364                 return;
 365         }
 366         SPRINT(filename, "%s_loop", p_tone_name);
 367         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, 0, 0))) {
 368                 p_tone_fetched = NULL;
 369                 return;
 370         }
 371         SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 372         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 373                 close(fh);
 374                 return;
 375         }
 376         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 377         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 378                 close(fh);
 379                 return;
 380         }
 381
 382         if (!strcmp(name,"cause_00") || !strcmp(name,"cause_10")) {
 383                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using release tone\n", p_name, name+6);
 384                 SPRINT(p_tone_name,"release");
 385         } else
 386         if (!strcmp(name,"cause_11")) {
 387                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using busy tone\n", p_name, name+6);
 388                 SPRINT(p_tone_name,"busy");
 389         } else {
 390                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using error tone\n", p_name, name+6);
 391                 SPRINT(p_tone_name,"error");
 392         }
 393 }
 394
 395
 396 void Port::set_display(const char *text)
 397 {
 398 }
 399
 400 /*
 401  * set the file in the tone directory for vbox playback
 402  * also set the play_eof-flag
 403  */
 404 void Port::set_vbox_tone(const char *dir, const char *name)
 405 {
 406         char filename[256];
 407
 408         p_tone_speed = 1;
 409         p_tone_counter = 0;
 410         p_tone_codec = CODEC_LAW;
 411         p_tone_eof = 1;
 412
 413         if (p_tone_fh >= 0) {
 414                 close(p_tone_fh);
 415                 p_tone_fh = -1;
 416                 fhuse--;
 417         }
 418         p_tone_fetched = NULL;
 419
 420         SPRINT(p_tone_dir,  dir);
 421         SPRINT(p_tone_name,  name);
 422         /* trigger playback */
 423         update_load();
 424
 425         /* now we check if the cause exists, otherwhise we use error tone. */
 426         if (p_tone_dir[0]) {
 427                 if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 428                         PDEBUG(DEBUG_PORT, "PORT(%s) opening fetched tone: %s\n", p_name, p_tone_name);
 429                         return;
 430                 }
 431                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 432                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 433                         fhuse++;
 434                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 435                         return;
 436                 }
 437         } else {
 438                 SPRINT(filename, "%s", p_tone_name);
 439                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 440                         fhuse++;
 441                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 442                         return;
 443                 }
 444         }
 445 }
 446
 447
 448 /*
 449  * set the file in the given directory for vbox playback
 450  * also set the eof-flag
 451  * also set the counter-flag
 452  */
 453 void Port::set_vbox_play(const char *name, int offset)
 454 {
 455         struct lcr_msg *message;
 456
 457         /* use ser_box_tone() */
 458         set_vbox_tone("", name);
 459         if (p_tone_fh < 0)
 460                 return;
 461
 462         /* enable counter */
 463         p_tone_counter = 1;
 464
 465         /* seek */
 466         if (p_tone_name[0]) {
 467                 /* send message with counter value */
 468                 if (p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 469                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 470                         message->param.counter.current = offset;
 471                         message->param.counter.max = p_tone_size;
 472                         message_put(message);
 473                 }
 474         }
 475 }
 476
 477
 478 /*
 479  * set the playback speed (for recording playback with different speeds)
 480  */
 481 void Port::set_vbox_speed(int speed)
 482 {
 483         /* enable vbox play mode */
 484         p_tone_speed = speed;
 485 }
 486
 487 /*
 488  * read from the given file as specified in port_set_tone and return sample data
 489  * if the tone ends, the result may be less samples than requested
 490  */
 491 int Port::read_audio(unsigned char *buffer, int length)
 492 {
 493         int l = 0,len;
 494         int nodata=0; /* to detect 0-length files and avoid endless reopen */
 495         char filename[128];
 496         int tone_left_before; /* temp variable to determine the change in p_tone_left */
 497
 498         /* nothing */
 499         if (length == 0)
 500                 return(0);
 501
 502         len = length;
 503
 504         /* if there is no tone set, use silence */
 505         if (!p_tone_name[0])
 506                 return(0);
 507
 508         /* if the file pointer is not open, we open it */
 509         if (p_tone_fh<0 && p_tone_fetched==NULL) {
 510                 if (p_tone_dir[0]) {
 511                         SPRINT(filename, "%s", p_tone_name);
 512                         /* if file does not exist */
 513                         if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 514                                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 515                                 /* if file does not exist */
 516                                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 517                                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 518                                         goto try_loop;
 519                                 }
 520                                 fhuse++;
 521                         }
 522                 } else {
 523                         SPRINT(filename, "%s", p_tone_name);
 524                         /* if file does not exist */
 525                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 526                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 527                                 goto try_loop;
 528                         }
 529                         fhuse++;
 530                 }
 531                 PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 532         }
 533
 534 read_more:
 535         /* file descriptor is open read data */
 536         tone_left_before = p_tone_left;
 537         if (p_tone_fh >= 0) {
 538                 l = read_tone(p_tone_fh, buffer, p_tone_codec, len, p_tone_size, &p_tone_left, p_tone_speed);
 539                 if (l<0 || l>len) /* paranoia */
 540                         l=0;
 541                 buffer += l;
 542                 len -= l;
 543         }
 544         if (p_tone_fetched) {
 545                 l = read_tone_fetched(&p_tone_fetched, buffer, len, p_tone_size, &p_tone_left, p_tone_speed);
 546                 if (l<0 || l>len) /* paranoia */
 547                         l=0;
 548                 buffer += l;
 549                 len -= l;
 550         }
 551
 552         /* if counter is enabled, we check if we have a change */
 553         if (p_tone_counter && p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 554                 /* if we jumed to the next second */
 555                 if (((p_tone_size-p_tone_left)/8000) != (p_tone_size-tone_left_before)/8000) {
 556 //printf("\nsize=%d left=%d\n\n",p_tone_size,p_tone_left);
 557                         struct lcr_msg *message;
 558                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 559                         message->param.counter.current = (p_tone_size-p_tone_left)/8000;
 560                         message->param.counter.max = -1;
 561                         message_put(message);
 562                 }
 563         }
 564
 565         if (len==0)
 566                 return(length-len);
 567
 568         if (p_tone_fh >= 0) {
 569                 close(p_tone_fh);
 570                 p_tone_fh = -1;
 571                 fhuse--;
 572         }
 573         p_tone_fetched = NULL;
 574
 575         if (l)
 576                 nodata=0;
 577
 578         /* if the file has 0-length */
 579         if (nodata>1) {
 580                 PDEBUG(DEBUG_PORT, "PORT(%s) 0-length loop: %s\n", p_name, filename);
 581                 p_tone_name[0]=0;
 582                 p_tone_dir[0]=0;
 583                 return(length-len);
 584         }
 585
 586         /* if eof is reached, or if the normal file cannot be opened, continue with the loop file if possible */
 587 try_loop:
 588         if (p_tone_eof && ACTIVE_EPOINT(p_epointlist)) {
 589                 struct lcr_msg *message;
 590                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_EOF);
 591                 message_put(message);
 592         }
 593
 594         if (p_tone_dir[0]) {
 595                 /* if file does not exist */
 596                 SPRINT(filename, "%s_loop", p_tone_name);
 597                 if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 598                         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 599                         /* if file does not exist */
 600                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 601                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 602                                 p_tone_dir[0] = '\0';
 603                                 p_tone_name[0] = '\0';
 604                                 return(length-len);
 605                         }
 606                         fhuse++;
 607                 }
 608         } else {
 609                 SPRINT(filename, "%s_loop", p_tone_name);
 610                 /* if file does not exist */
 611                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 612                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 613                         p_tone_dir[0] = '\0';
 614                         p_tone_name[0] = '\0';
 615                         return(length-len);
 616                 }
 617                 fhuse++;
 618         }
 619         nodata++;
 620         PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 621
 622         /* now we have opened the loop */
 623         goto read_more;
 624 }
 625
 626
 627 /* Endpoint sends messages to the port
 628  * This is called by the message_epoint, inherited by child classes.
 629  * Therefor a return 1 means: "already handled here"
 630  */
 631 //extern struct lcr_msg *dddebug;
 632 int Port::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 633 {
 634         /* check if we got audio data from one remote port */
 635         switch(message_id) {
 636         case MESSAGE_TONE: /* play tone */
 637                 PDEBUG(DEBUG_PORT, "PORT(%s) setting tone '%s' dir '%s'\n", p_name, param->tone.name, param->tone.dir);
 638                 set_tone(param->tone.dir,param->tone.name);
 639                 return 1;
 640
 641         case MESSAGE_VBOX_TONE: /* play tone of answering machine */
 642                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine tone '%s' '%s'\n", p_name, param->tone.dir, param->tone.name);
 643                 set_vbox_tone(param->tone.dir, param->tone.name);
 644                 return 1;
 645
 646         case MESSAGE_VBOX_PLAY: /* play recording of answering machine */
 647                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine file to play '%s' (offset %d seconds)\n", p_name, param->play.file, param->play.offset);
 648                 set_vbox_play(param->play.file, param->play.offset);
 649                 return 1;
 650
 651         case MESSAGE_VBOX_PLAY_SPEED: /* set speed of playback (recording of answering machine) */
 652                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine playback speed %d (times)\n", p_name, param->speed);
 653                 set_vbox_speed(param->speed);
 654                 return 1;
 655
 656         case MESSAGE_BRIDGE: /* create / join / leave / destroy bridge */
 657                 PDEBUG(DEBUG_PORT, "PORT(%s) bridging to id %d\n", p_name, param->bridge_id);
 658                 bridge(param->bridge_id);
 659                 return 1;
 660
 661 #ifdef WITH_VOOTP
 662         case MESSAGE_VOOTP: /* enable / disable VoOTP */
 663                 PDEBUG(DEBUG_PORT, "PORT(%s) VoOTP enabled: %d\n", p_name, param->vootp.enable);
 664                 set_vootp(&param->vootp);
 665                 return 1;
 666 #endif
 667
 668         case MESSAGE_DOV_REQUEST: /* Data-Over-Voice message */
 669                 PDEBUG(DEBUG_PORT, "PORT(%s) sending data over voice message (len=%d)\n", p_name, param->dov.length);
 670                 dov_sendmsg(param->dov.data, param->dov.length, (enum dov_type)param->dov.type, param->dov.level);
 671                 return 1;
 672
 673         case MESSAGE_DOV_LISTEN: /* Data-Over-Voice listen order */
 674                 PDEBUG(DEBUG_PORT, "PORT(%s) sending data over voice listen order\n", p_name);
 675                 dov_listen((enum dov_type)param->dov.type);
 676                 return 1;
 677         }
 678
 679         return 0;
 680 }
 681
 682
 683 /* wave header structure */
 684 struct fmt {
 685         unsigned short  stereo; /* 1 = mono, 2 = stereo */
 686         unsigned short  channels; /* number of channels */
 687         unsigned int    sample_rate; /* sample rate */
 688         unsigned int    data_rate; /* data rate */
 689         unsigned short  bytes_sample; /* bytes per sample (all channels) */
 690         unsigned short  bits_sample; /* bits per sample (one channel) */
 691 };
 692
 693
 694 /*
 695  * open record file (actually a wave file with empty header which will be
 696  * written before close, because we do not know the size yet)
 697  * type=1 record annoucement,  type=0 record audio stream, type=2 record vbox
 698  */
 699 int Port::open_record(int type, int vbox, int skip, char *extension, int anon_ignore, const char *vbox_email, int vbox_email_file)
 700 {
 701         /* RIFFxxxxWAVEfmt xxxx(fmt-size)dataxxxx... */
 702         char dummyheader[8+4+8+sizeof(fmt)+8];
 703         char filename[256];
 704         time_t now;
 705         struct tm *now_tm;
 706         int __attribute__((__unused__)) ret;
 707
 708         if (!extension) {
 709                 PERROR("Port(%d) not an extension\n", p_serial);
 710                 return(0);
 711         }
 712         SCPY(p_record_extension, extension);
 713         p_record_anon_ignore = anon_ignore;
 714         SCPY(p_record_vbox_email, vbox_email);
 715         p_record_vbox_email_file = vbox_email_file;
 716
 717         if (p_record) {
 718                 PERROR("Port(%d) already recording\n", p_serial);
 719                 return(0);
 720         }
 721
 722         if (vbox != 0)
 723                 SPRINT(filename, "%s/%s/vbox", EXTENSION_DATA, p_record_extension);
 724         else
 725                 SPRINT(filename, "%s/%s/recordings", EXTENSION_DATA, p_record_extension);
 726         if (mkdir(filename, 0755) < 0) {
 727                 if (errno != EEXIST) {
 728                         PERROR("Port(%d) cannot create directory '%s'\n", p_serial, filename);
 729                         return(0);
 730                 }
 731         }
 732
 733         if (vbox == 1)
 734                 UPRINT(strchr(filename,'\0'), "/announcement");
 735         else {
 736                 time(&now);
 737                 now_tm = localtime(&now);
 738                 UPRINT(strchr(filename,'\0'), "/%04d-%02d-%02d_%02d%02d%02d", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
 739         }
 740         if (vbox == 2) {
 741                 p_record_vbox_year = now_tm->tm_year;
 742                 p_record_vbox_mon = now_tm->tm_mon;
 743                 p_record_vbox_mday = now_tm->tm_mday;
 744                 p_record_vbox_hour = now_tm->tm_hour;
 745                 p_record_vbox_min = now_tm->tm_min;
 746         }
 747
 748         /* check, if file exists (especially when an extension calls the same extension) */
 749         if (vbox != 1)
 750         if ((p_record = fopen(filename, "r"))) {
 751                 fclose(p_record);
 752                 SCAT(filename, "_2nd");
 753         }
 754
 755         p_record = fopen(filename, "w");
 756         if (!p_record) {
 757                 PERROR("Port(%d) cannot record because file cannot be opened '%s'\n", p_serial, filename);
 758                 return(0);
 759         }
 760         update_rxoff();
 761         fduse++;
 762
 763         p_record_type = type;
 764         p_record_vbox = vbox;
 765         p_record_skip = skip;
 766         p_record_length = 0;
 767         switch(p_record_type) {
 768                 case CODEC_MONO:
 769                 case CODEC_STEREO:
 770                 case CODEC_8BIT:
 771                 memset(&dummyheader, 0, sizeof(dummyheader));
 772                 ret = fwrite(dummyheader, sizeof(dummyheader), 1, p_record);
 773                 break;
 774
 775                 case CODEC_LAW:
 776                 break;
 777         }
 778         UCPY(p_record_filename, filename);
 779
 780         PDEBUG(DEBUG_PORT, "Port(%d) recording started with file name '%s'\n", p_serial, filename);
 781         return(1);
 782 }
 783
 784
 785 /*
 786  * close the recoding file, put header in front and rename
 787  */
 788 void Port::close_record(int beep, int mute)
 789 {
 790         static signed short beep_mono[256];
 791         unsigned int size = 0, wsize = 0;
 792         struct fmt fmt;
 793         char filename[512], indexname[512];
 794         FILE *fp;
 795         int i, ii;
 796         char number[256], callerid[256];
 797         char *p;
 798         struct caller_info callerinfo;
 799         const char *valid_chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890_.-!$%&/()=+*;~";
 800         int __attribute__((__unused__)) ret;
 801
 802         if (!p_record)
 803                 return;
 804         PDEBUG(DEBUG_PORT, "data still in record buffer: %d (dir %d)\n", (p_record_buffer_writep - p_record_buffer_readp) & RECORD_BUFFER_MASK, p_record_buffer_dir);
 805
 806         memcpy(&callerinfo, &p_callerinfo, sizeof(struct caller_info));
 807 //      apply_callerid_restriction(p_record_anon_ignore, callerinfo.id, &callerinfo.ntype, &callerinfo.present, &callerinfo.screen, callerinfo.extension, callerinfo.name);
 808
 809         SCPY(number, p_dialinginfo.id);
 810         SCPY(callerid, numberrize_callerinfo(callerinfo.id, callerinfo.ntype, options.national, options.international));
 811         if (callerid[0] == '\0') {
 812                 if (callerinfo.present == INFO_PRESENT_RESTRICTED)
 813                         UCPY(callerid,"anonymous");
 814                 else
 815                         UCPY(callerid,"unknown");
 816         }
 817
 818         /* change verboten digits */
 819         p = callerid;
 820         while((p=strchr(p,'*')))
 821                 *(p++) = 'x';
 822         p = callerid;
 823         while((p=strchr(p,'/')))
 824                 *(p++) = 'x';
 825         p = number;
 826         while((p=strchr(p,'*')))
 827                 *(p++) = 'x';
 828         p = number;
 829         while((p=strchr(p,'/')))
 830                 *(p++) = 'x';
 831         i = 0;
 832         ii = strlen(callerid);
 833         while(i < ii) {
 834                 if (!strchr(valid_chars, callerid[i]))
 835                         callerid[i] = '_';
 836                 i++;
 837         }
 838         i = 0;
 839         ii = strlen(number);
 840         while(i < ii) {
 841                 if (!strchr(valid_chars, number[i]))
 842                         number[i] = '_';
 843                 i++;
 844         }
 845
 846         /* mute */
 847         if (mute && p_record_type==CODEC_MONO) {
 848                 i = p_record_length;
 849                 if (i > mute)
 850                         i = mute;
 851                 fseek(p_record, -(i<<1), SEEK_END);
 852                 p_record_length -= (i<<1);
 853         }
 854         /* add beep to the end of recording */
 855         if (beep && p_record_type==CODEC_MONO) {
 856                 i = 0;
 857                 while(i < 256) {
 858                         beep_mono[i] = (signed short)(sin((double)i / 5.688888888889 * 2.0 * 3.1415927) * 2000.0);
 859                         i++;
 860                 }
 861                 i = 0;
 862                 while(i < beep) {
 863                         ret = fwrite(beep_mono, sizeof(beep_mono), 1, p_record);
 864                         i += sizeof(beep_mono);
 865                         p_record_length += sizeof(beep_mono);
 866                 }
 867         }
 868
 869         /* complete header */
 870         switch(p_record_type) {
 871                 case CODEC_MONO:
 872                 case CODEC_STEREO:
 873                 case CODEC_8BIT:
 874                 /* cue */
 875                 fprintf(p_record, "cue %c%c%c%c%c%c%c%c", 4, 0, 0, 0, 0,0,0,0);
 876
 877                 /* LIST */
 878                 fprintf(p_record, "LIST%c%c%c%cadtl", 4, 0, 0, 0);
 879
 880                 /* go to header */
 881                 fseek(p_record, 0, SEEK_SET);
 882
 883                 /* WAVEfmt xxxx(fmt-size)dataxxxx[data]cue xxxx0000LISTxxxxadtl*/
 884                 size = p_record_length;
 885                 wsize = 4+8+sizeof(fmt)+8+size+8+4+8+4;
 886
 887                 /* RIFF */
 888                 fprintf(p_record, "RIFF%c%c%c%c", (unsigned char)(wsize&0xff), (unsigned char)((wsize>>8)&0xff), (unsigned char)((wsize>>16)&0xff), (unsigned char)(wsize>>24));
 889
 890                 /* WAVE */
 891                 fprintf(p_record, "WAVE");
 892
 893                 /* fmt */
 894                 fprintf(p_record, "fmt %c%c%c%c", (unsigned int)sizeof(fmt), 0, 0, 0);
 895                 switch(p_record_type) {
 896                         case CODEC_MONO:
 897                         fmt.stereo = 1;
 898                         fmt.channels = 1;
 899                         fmt.sample_rate = 8000; /* samples/sec */
 900                         fmt.data_rate = 16000; /* full data rate */
 901                         fmt.bytes_sample = 2; /* all channels */
 902                         fmt.bits_sample = 16; /* one channel */
 903                         break;
 904
 905                         case CODEC_STEREO:
 906                         fmt.stereo = 1;
 907                         fmt.channels = 2;
 908                         fmt.sample_rate = 8000; /* samples/sec */
 909                         fmt.data_rate = 32000; /* full data rate */
 910                         fmt.bytes_sample = 4; /* all channels */
 911                         fmt.bits_sample = 16; /* one channel */
 912                         break;
 913
 914                         case CODEC_8BIT:
 915                         fmt.stereo = 1;
 916                         fmt.channels = 1;
 917                         fmt.sample_rate = 8000; /* samples/sec */
 918                         fmt.data_rate = 8000; /* full data rate */
 919                         fmt.bytes_sample = 1; /* all channels */
 920                         fmt.bits_sample = 8; /* one channel */
 921                         break;
 922                 }
 923                 ret = fwrite(&fmt, sizeof(fmt), 1, p_record);
 924
 925                 /* data */
 926                 fprintf(p_record, "data%c%c%c%c", (unsigned char)(size&0xff), (unsigned char)((size>>8)&0xff), (unsigned char)((size>>16)&0xff), (unsigned char)(size>>24));
 927
 928                 /* rename file */
 929                 if (p_record_vbox == 1)
 930                         SPRINT(filename, "%s.wav", p_record_filename);
 931                 else
 932                         SPRINT(filename, "%s_%s-%s.wav", p_record_filename, callerid, number);
 933                 break;
 934
 935                 case CODEC_LAW:
 936                 /* rename file */
 937                 if (p_record_vbox == 1)
 938                         SPRINT(filename, "%s.isdn", p_record_filename);
 939                 else
 940                         SPRINT(filename, "%s_%s-%s.isdn", p_record_filename, callerid, number);
 941                 break;
 942         }
 943
 944         fclose(p_record);
 945         fduse--;
 946         p_record = NULL;
 947         update_rxoff();
 948
 949         if (rename(p_record_filename, filename) < 0) {
 950                 PERROR("Port(%d) cannot rename from '%s' to '%s'\n", p_serial, p_record_filename, filename);
 951                 return;
 952         }
 953
 954         PDEBUG(DEBUG_PORT, "Port(%d) recording is written and renamed to '%s' and must have the following size:%lu raw:%lu samples:%lu\n", p_serial, filename, wsize+8, size, size>>1);
 955
 956         if (p_record_vbox == 2) {
 957                 SPRINT(indexname, "%s/%s/vbox/index", EXTENSION_DATA, p_record_extension);
 958                 if ((fp = fopen(indexname,"a"))) {
 959                         fduse++;
 960
 961                         /* remove path from file name */
 962                         p = filename;
 963                         while(strchr(p, '/'))
 964                                 p = strchr(p, '/')+1;
 965                         fprintf(fp, "%s %d %d %d %d %d %s\n", p, p_record_vbox_year, p_record_vbox_mon, p_record_vbox_mday, p_record_vbox_hour, p_record_vbox_min, callerid);
 966
 967                         fclose(fp);
 968                         fduse--;
 969                 } else {
 970                         PERROR("Port(%d) cannot open index file '%s' to append.\n", p_serial, indexname);
 971                 }
 972
 973                 /* send email with sample*/
 974                 if (p_record_vbox_email[0]) {
 975                         send_mail(p_record_vbox_email_file?filename:(char *)"", callerid, callerinfo.extension, callerinfo.name, p_record_vbox_email, p_record_vbox_year, p_record_vbox_mon, p_record_vbox_mday, p_record_vbox_hour, p_record_vbox_min, p_record_extension);
 976                 }
 977         }
 978 }
 979
 980
 981 /*
 982  * recording function
 983  * Records all data from down and from up into one single stream.
 984  * Both streams may have gaps or jitter.
 985  * A Jitter buffer for both streams is used to compensate jitter.
 986  *
 987  * If one stream (dir) received packets, they are stored to a
 988  * buffer to wait for the other stream (dir), so both streams can
 989  * be combined. If the buffer is full, it's content is written
 990  * without mixing stream. (assuming only one stram (dir) exists.)
 991  * A flag is used to indicate what stream is currently in buffer.
 992  *
 993  * NOTE: First stereo sample (odd) is from down, second is from up.
 994  */
 995 void Port::record(unsigned char *data, int length, int dir_fromup)
 996 {
 997         unsigned char write_buffer[1024], *d;
 998         signed short *s;
 999         int free, i, ii;
1000         signed int sample;
1001         int __attribute__((__unused__)) ret;
1002
1003         /* no recording */
1004         if (!p_record || !length)
1005                 return;
1006
1007         /* skip data from local caller (dtmf input) */
1008         if (p_record_skip && !dir_fromup) {
1009                 /* more to skip than we have */
1010                 if (p_record_skip > length) {
1011                         p_record_skip -= length;
1012                         return;
1013                 }
1014                 /* less to skip */
1015                 data += p_record_skip;
1016                 length -= p_record_skip;
1017                 p_record_skip = 0;
1018         }
1019
1020 //printf("dir=%d len=%d\n", dir_fromup, length);
1021
1022         free = ((p_record_buffer_readp - p_record_buffer_writep - 1) & RECORD_BUFFER_MASK);
1023
1024 //PDEBUG(DEBUG_PORT, "record(data,%d,%d): free=%d, p_record_buffer_dir=%d, p_record_buffer_readp=%d, p_record_buffer_writep=%d.\n", length, dir_fromup, free, p_record_buffer_dir, p_record_buffer_readp, p_record_buffer_writep);
1025
1026         /* the buffer stores the same data stream */
1027         if (dir_fromup == p_record_buffer_dir) {
1028 same_again:
1029
1030 //printf("same free=%d length=%d\n", free, length);
1031                 /* first write what we can to the buffer */
1032                 while(free && length) {
1033                         p_record_buffer[p_record_buffer_writep] = audio_law_to_s32[*data++];
1034                         p_record_buffer_writep = (p_record_buffer_writep + 1) & RECORD_BUFFER_MASK;
1035                         free--;
1036                         length--;
1037                 }
1038                 /* all written, so we return */
1039                 if (!length)
1040                         return;
1041                 /* still data left, buffer is full, so we need to write a chunk to file */
1042                 switch(p_record_type) {
1043                         case CODEC_MONO:
1044                         s = (signed short *)write_buffer;
1045                         i = 0;
1046                         while(i < 256) {
1047                                 *s++ = p_record_buffer[p_record_buffer_readp];
1048                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1049                                 i++;
1050                         }
1051                         ret = fwrite(write_buffer, 512, 1, p_record);
1052                         p_record_length += 512;
1053                         break;
1054
1055                         case CODEC_STEREO:
1056                         s = (signed short *)write_buffer;
1057                         if (p_record_buffer_dir) {
1058                                 i = 0;
1059                                 while(i < 256) {
1060                                         *s++ = 0; /* nothing from down */
1061                                         *s++ = p_record_buffer[p_record_buffer_readp];
1062                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1063                                         i++;
1064                                 }
1065                         } else {
1066                                 i = 0;
1067                                 while(i < 256) {
1068                                         *s++ = p_record_buffer[p_record_buffer_readp];
1069                                         *s++ = 0; /* nothing from up */
1070                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1071                                         i++;
1072                                 }
1073                         }
1074                         ret = fwrite(write_buffer, 1024, 1, p_record);
1075                         p_record_length += 1024;
1076                         break;
1077
1078                         case CODEC_8BIT:
1079                         d = write_buffer;
1080                         i = 0;
1081                         while(i < 256) {
1082                                 *d++ = ((unsigned short)(p_record_buffer[p_record_buffer_readp]+0x8000)) >> 8;
1083                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1084                                 i++;
1085                         }
1086                         ret = fwrite(write_buffer, 512, 1, p_record);
1087                         p_record_length += 512;
1088                         break;
1089
1090                         case CODEC_LAW:
1091                         d = write_buffer;
1092                         i = 0;
1093                         while(i < 256) {
1094                                 *d++ = audio_s16_to_law[p_record_buffer[p_record_buffer_readp] & 0xffff];
1095                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1096                                 i++;
1097                         }
1098                         ret = fwrite(write_buffer, 256, 1, p_record);
1099                         p_record_length += 256;
1100                         break;
1101                 }
1102                 /* because we still have data, we write again */
1103                 free += 256;
1104                 goto same_again;
1105         }
1106         /* the buffer stores the other stream */
1107
1108 different_again:
1109         /* if buffer empty, change it */
1110         if (p_record_buffer_readp == p_record_buffer_writep) {
1111                 p_record_buffer_dir = dir_fromup;
1112                 goto same_again;
1113         }
1114         /* how much data can we mix ? */
1115         ii = (p_record_buffer_writep - p_record_buffer_readp) & RECORD_BUFFER_MASK;
1116         if (length < ii)
1117                 ii = length;
1118
1119         if (ii > 256)
1120                 ii = 256;
1121 //printf("same ii=%d length=%d\n", ii, length);
1122 //PDEBUG(DEBUG_PORT, "record(data,%d,%d): free=%d, p_record_buffer_dir=%d, p_record_buffer_readp=%d, p_record_buffer_writep=%d: mixing %d bytes.\n", length, dir_fromup, free, p_record_buffer_dir, p_record_buffer_readp, p_record_buffer_writep, ii);
1123
1124         /* write data mixed with the buffer */
1125         switch(p_record_type) {
1126                 case CODEC_MONO:
1127                 s = (signed short *)write_buffer;
1128                 i = 0;
1129                 while(i < ii) {
1130                         sample = p_record_buffer[p_record_buffer_readp]
1131                                 + audio_law_to_s32[*data++];
1132                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1133                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1134                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1135                         *s++ = sample;
1136                         i++;
1137                 }
1138                 ret = fwrite(write_buffer, ii<<1, 1, p_record);
1139                 p_record_length += (ii<<1);
1140                 break;
1141
1142                 case CODEC_STEREO:
1143                 s = (signed short *)write_buffer;
1144                 if (p_record_buffer_dir) {
1145                         i = 0;
1146                         while(i < ii) {
1147                                 *s++ = audio_law_to_s32[*data++];
1148                                 *s++ = p_record_buffer[p_record_buffer_readp];
1149                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1150                                 i++;
1151                         }
1152                 } else {
1153                         i = 0;
1154                         while(i < ii) {
1155                                 *s++ = p_record_buffer[p_record_buffer_readp];
1156                                 *s++ = audio_law_to_s32[*data++];
1157                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1158                                 i++;
1159                         }
1160                 }
1161                 ret = fwrite(write_buffer, ii<<2, 1, p_record);
1162                 p_record_length += (ii<<2);
1163                 break;
1164
1165                 case CODEC_8BIT:
1166                 d = write_buffer;
1167                 i = 0;
1168                 while(i < ii) {
1169                         sample = p_record_buffer[p_record_buffer_readp]
1170                                 + audio_law_to_s32[*data++];
1171                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1172                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1173                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1174                         *d++ = (sample+0x8000) >> 8;
1175                         i++;
1176                 }
1177                 ret = fwrite(write_buffer, ii, 1, p_record);
1178                 p_record_length += ii;
1179                 break;
1180
1181                 case CODEC_LAW:
1182                 d = write_buffer;
1183                 i = 0;
1184                 while(i < ii) {
1185                         sample = p_record_buffer[p_record_buffer_readp]
1186                                 + audio_law_to_s32[*data++];
1187                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1188                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1189                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1190                         *d++ = audio_s16_to_law[sample & 0xffff];
1191                         i++;
1192                 }
1193                 ret = fwrite(write_buffer, ii, 1, p_record);
1194                 p_record_length += ii;
1195                 break;
1196         }
1197         length -= ii;
1198         /* still data */
1199         if (length)
1200                 goto different_again;
1201         /* no data (maybe buffer) */
1202         return;
1203
1204 }
1205
1206 void Port::tap(unsigned char *data, int length, int dir_fromup)
1207 {
1208 }
1209
1210 void Port::update_rxoff(void)
1211 {
1212 }
1213
1214 void Port::update_load(void)
1215 {
1216 }
1217
1218
1219 /*
1220  * bridge handling
1221  */
1222
1223 int bridge_timeout(struct lcr_timer *timer, void *instance, int index);
1224
1225 static void remove_bridge(struct port_bridge *bridge, class Port *port)
1226 {
1227         struct port_bridge **temp = &p_bridge_first;
1228         while (*temp) {
1229                 if (*temp == bridge) {
1230                         struct port_bridge_member **memberp = &bridge->first, *member;
1231
1232                         /* loop until we are found */
1233                         while(*memberp) {
1234                                 if ((*memberp)->port == port) {
1235                                         member = *memberp;
1236                                         *memberp = member->next;
1237                                         FREE(member, sizeof(struct port_bridge_member));
1238                                         memuse--;
1239 #ifndef TEST_CONFERENCE
1240                                         if (bridge->first && bridge->first->next && !bridge->first->next->next) {
1241 #else
1242                                         if (bridge->first && !bridge->first->next) {
1243 #endif
1244                                                 PDEBUG(DEBUG_PORT, "bridge %u is no conference anymore\n", bridge->bridge_id);
1245                                                 del_timer(&bridge->timer);
1246                                         }
1247                                         break;
1248                                 }
1249                                 memberp = &((*memberp)->next);
1250                         }
1251                         /* if bridge is empty, remove it */
1252                         if (bridge->first == NULL) {
1253                                 PDEBUG(DEBUG_PORT, "Remove bridge %u\n", bridge->bridge_id);
1254                                 *temp = bridge->next;
1255                                 FREE(bridge, sizeof(struct port_bridge));
1256                                 memuse--;
1257                         }
1258                         return;
1259                 }
1260                 temp = &((*temp)->next);
1261         }
1262         PERROR("Bridge %p not found in list\n", bridge);
1263 }
1264
1265 void Port::bridge(unsigned int bridge_id)
1266 {
1267         struct port_bridge_member **memberp;
1268
1269         /* Remove bridge, if we leave bridge or if we join a different bridge. */
1270         if (p_bridge && bridge_id != p_bridge->bridge_id) {
1271                 PDEBUG(DEBUG_PORT, "Remove port %u from bridge %u, because out new bridge is %u\n", p_serial, p_bridge->bridge_id, bridge_id);
1272                 remove_bridge(p_bridge, this);
1273                 p_bridge = NULL;
1274         }
1275
1276         /* if we leave bridge */
1277         if (!bridge_id)
1278                 return;
1279
1280         /* find bridge */
1281         if (!p_bridge) {
1282                 struct port_bridge *temp = p_bridge_first;
1283
1284                 while (temp) {
1285                         if (temp->bridge_id == bridge_id)
1286                                 break;
1287                         temp = temp->next;
1288                 }
1289                 p_bridge = temp;
1290                 if (p_bridge)
1291                         PDEBUG(DEBUG_PORT, "Port %d found existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1292         }
1293
1294         /* create bridge */
1295         if (!p_bridge) {
1296                 struct port_bridge **temp = &p_bridge_first;
1297
1298                 p_bridge = (struct port_bridge *) MALLOC(sizeof(struct port_bridge));
1299                 memuse++;
1300                 p_bridge->bridge_id = bridge_id;
1301
1302                 /* attach bridge instance to list */
1303                 while (*temp)
1304                         temp = &((*temp)->next);
1305                 *temp = p_bridge;
1306                 PDEBUG(DEBUG_PORT, "Port %d creating not existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1307         }
1308
1309         /* attach to bridge */
1310         memberp = &p_bridge->first;
1311         while(*memberp) {
1312                 if ((*memberp)->port == this) {
1313                         /* already joined */
1314                         return;
1315                 }
1316                 memberp = &((*memberp)->next);
1317         }
1318         *memberp = (struct port_bridge_member *) MALLOC(sizeof(struct port_bridge_member));
1319         memuse++;
1320         (*memberp)->port = this;
1321         /* check if bridge becomes a conference */
1322 #ifndef TEST_CONFERENCE
1323         if (p_bridge->first->next && p_bridge->first->next->next && !p_bridge->first->next->next->next) {
1324                 p_bridge->first->next->next->write_p = 0;
1325                 p_bridge->first->next->next->min_space = 0;
1326                 memset(p_bridge->first->next->next->buffer, silence, sizeof((*memberp)->buffer));
1327 #else
1328         if (p_bridge->first->next && !p_bridge->first->next->next) {
1329 #endif
1330                 p_bridge->first->next->write_p = 0;
1331                 p_bridge->first->next->min_space = 0;
1332                 memset(p_bridge->first->next->buffer, silence, sizeof((*memberp)->buffer));
1333                 p_bridge->first->write_p = 0;
1334                 p_bridge->first->min_space = 0;
1335                 memset(p_bridge->first->buffer, silence, sizeof((*memberp)->buffer));
1336                 memset(p_bridge->sum_buffer, 0, sizeof(p_bridge->sum_buffer));
1337                 p_bridge->read_p = 0;
1338                 add_timer(&p_bridge->timer, bridge_timeout, p_bridge, 0);
1339                 schedule_timer(&p_bridge->timer, 0, 20000); /* 20 MS */
1340                 p_bridge->sample_count = 0;
1341                 PDEBUG(DEBUG_PORT, "bridge %u became a conference\n", p_bridge->bridge_id);
1342         }
1343 }
1344
1345 /* send data to remote Port or add to sum buffer */
1346 int Port::bridge_tx(unsigned char *data, int len)
1347 {
1348         int write_p, space;
1349         struct port_bridge_member *member;
1350         signed long *sum;
1351         unsigned char *buf;
1352
1353 #ifdef WITH_VOOTP
1354         if (p_vootp)
1355                 vootp_encrypt_stream(p_vootp, data, len);
1356 #endif
1357
1358         /* less than two ports, so drop */
1359         if (!p_bridge || !p_bridge->first || !p_bridge->first->next)
1360                 return -EIO;
1361 #ifndef TEST_CONFERENCE
1362         /* two ports, so bridge */
1363         if (!p_bridge->first->next->next) {
1364                 if (p_bridge->first->port == this)
1365                         return p_bridge->first->next->port->bridge_rx(data, len);
1366                 if (p_bridge->first->next->port == this)
1367                         return p_bridge->first->port->bridge_rx(data, len);
1368                 return -EINVAL;
1369         }
1370 #endif
1371         /* more than two ports... */
1372         member = p_bridge->first;
1373         while (member) {
1374                 if (member->port == this)
1375                         break;
1376                 member = member->next;
1377         }
1378         if (!member)
1379                 return -EINVAL;
1380         write_p = member->write_p;
1381         /* calculate space, so write pointer will not overrun (or reach) read pointer in ring buffer */
1382         space = (p_bridge->read_p - write_p - 1) & (BRIDGE_BUFFER - 1);
1383         /* clip len, if it does not fit */
1384         if (space < len)
1385                 len = space;
1386         /* apply audio samples to sum buffer */
1387         sum = p_bridge->sum_buffer;
1388         buf = member->buffer;
1389         while (len--) {
1390                 sum[write_p] += audio_law_to_s32[*data];
1391                 buf[write_p] = *data++;
1392                 write_p = (write_p + 1) & (BRIDGE_BUFFER - 1);
1393         }
1394         /* raise write pointer */
1395         member->write_p = write_p;
1396
1397         return 0;
1398 }
1399
1400 int bridge_timeout(struct lcr_timer *timer, void *instance, int index)
1401 {
1402         struct port_bridge *bridge = (struct port_bridge *)instance;
1403         struct port_bridge_member *member = bridge->first;
1404         unsigned long long timer_time;
1405         signed long *sum, sample;
1406         unsigned char buffer[160], *buf, *d;
1407         int i, read_p, space;
1408
1409         bridge->sample_count += 160;
1410
1411         /* schedule exactly 20ms from last schedule */
1412         timer_time = timer->timeout.tv_sec * MICRO_SECONDS + timer->timeout.tv_usec;
1413         timer_time += 20000; /* 20 MS */
1414         timer->timeout.tv_sec = timer_time / MICRO_SECONDS;
1415         timer->timeout.tv_usec = timer_time % MICRO_SECONDS;
1416         timer->active = 1;
1417
1418         while (member) {
1419                 /* calculate transmit data */
1420                 read_p = bridge->read_p;
1421                 sum = bridge->sum_buffer;
1422                 buf = member->buffer;
1423                 d = buffer;
1424                 for (i = 0; i < 160; i++) {
1425                         sample = sum[read_p];
1426                         sample -= audio_law_to_s32[buf[read_p]];
1427                         buf[read_p] = silence;
1428                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1429                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1430                         *d++ = audio_s16_to_law[sample & 0xffff];
1431                         read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1432                 }
1433                 /* send data */
1434                 member->port->bridge_rx(buffer, 160);
1435                 /* raise write pointer, if read pointer would overrun them */
1436                 space = ((member->write_p - bridge->read_p) & (BRIDGE_BUFFER - 1)) - 160;
1437                 if (space < 0) {
1438                         space = 0;
1439                         member->write_p = read_p;
1440 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has buffer underrun\n", bridge->bridge_id, member->port->p_serial);
1441                 }
1442                 /* find minimum delay */
1443                 if (space < member->min_space)
1444                         member->min_space = space;
1445                 /* check if we should reduce buffer */
1446                 if (bridge->sample_count >= 8000*5) {
1447                         /* reduce buffer by minimum delay */
1448 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has min space of %d samples\n", bridge->bridge_id, member->port->p_serial, member->min_space);
1449                         member->write_p = (member->write_p - member->min_space) & (BRIDGE_BUFFER - 1);
1450                         member->min_space = 1000000; /* infinite */
1451                 }
1452                 member = member->next;
1453         }
1454
1455         /* clear sample data */
1456         read_p = bridge->read_p;
1457         sum = bridge->sum_buffer;
1458         for (i = 0; i < 160; i++) {
1459                 sum[read_p] = 0;
1460                 read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1461         }
1462
1463         /* raise read pointer */
1464         bridge->read_p = read_p;
1465
1466         if (bridge->sample_count >= 8000*5)
1467                 bridge->sample_count = 0;
1468
1469         return 0;
1470 }
1471
1472
1473 /* receive data from remote Port */
1474 int Port::bridge_rx(unsigned char *data, int len)
1475 {
1476
1477 #ifdef WITH_VOOTP
1478         if (p_vootp)
1479                 vootp_decrypt_stream(p_vootp, data, len);
1480 #endif
1481
1482         return 0;
1483 }
1484
1485 #ifdef WITH_VOOTP
1486 static void vootp_info(void *priv, const char *text)
1487 {
1488         class Port *port = (class Port *)priv;
1489         char display[strlen(text) + 1];
1490
1491         SCPY(display, text);
1492         if (display[0])
1493                 display[strlen(display) - 1] = '\0';
1494
1495         port->set_display(display);
1496 }
1497
1498 void Port::set_vootp(struct param_vootp *vootp)
1499 {
1500         if (p_vootp) {
1501                 vootp_destroy(p_vootp);
1502                 p_vootp = NULL;
1503         }
1504         if (vootp->enable) {
1505                 p_vootp = vootp_create(this, (options.law=='a'), options.otp_dir, NULL, NULL, vootp->id, vootp_info);
1506 //              vootp_loglevel(VOOTP_LOGL_DEBUG);
1507                 if (!p_vootp) {
1508                         struct lcr_msg *message;
1509
1510                         message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_VOOTP);
1511                         message->param.vootp.failed = 1;
1512                         message_put(message);
1513                 }
1514         }
1515 }
1516 #endif