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                 SCPY(p_tones_interface, interface->tones_dir);
 165         }
 166         p_tone_dir[0] = '\0';
 167         p_type = type;
 168         p_serial = port_serial++;
 169         p_tone_fh = -1;
 170         p_tone_fetched = NULL;
 171         p_tone_name[0] = '\0';
 172         p_state = PORT_STATE_IDLE;
 173         p_epointlist = NULL;
 174         memset(&p_callerinfo, 0, sizeof(p_callerinfo));
 175         memset(&p_dialinginfo, 0, sizeof(p_dialinginfo));
 176         memset(&p_connectinfo, 0, sizeof(p_connectinfo));
 177         memset(&p_redirinfo, 0, sizeof(p_redirinfo));
 178         memset(&p_capainfo, 0, sizeof(p_capainfo));
 179         p_echotest = 0;
 180         p_bridge = 0;
 181
 182         /* call recording */
 183         p_record = NULL;
 184         p_tap = 0;
 185         p_record_type = 0;
 186         p_record_length = 0;
 187         p_record_skip = 0;
 188         p_record_filename[0] = '\0';
 189         p_record_buffer_readp = 0;
 190         p_record_buffer_writep = 0;
 191         p_record_buffer_dir = 0;
 192
 193         /* VoOTP */
 194 #ifdef WITH_VOOTP
 195         p_vootp = NULL;
 196 #endif
 197         /* D-O-V */
 198         dov_init();
 199
 200         /* append port to chain */
 201         next = NULL;
 202         temp = port_first;
 203         tempp = &port_first;
 204         while(temp) {
 205                 tempp = &temp->next;
 206                 temp = temp->next;
 207         }
 208         *tempp = this;
 209
 210         classuse++;
 211
 212         PDEBUG(DEBUG_PORT, "new port (%d) of type 0x%x, name '%s' interface '%s'\n", p_serial, type, portname, p_interface_name);
 213 }
 214
 215
 216 /*
 217  * port destructor
 218  */
 219 Port::~Port(void)
 220 {
 221         class Port *temp, **tempp;
 222         struct lcr_msg *message;
 223
 224         PDEBUG(DEBUG_PORT, "removing port (%d) of type 0x%x, name '%s' interface '%s'\n", p_serial, p_type, p_name, p_interface_name);
 225
 226 #ifdef WITH_VOOTP
 227         if (p_vootp) {
 228                 vootp_destroy(p_vootp);
 229                 p_vootp = NULL;
 230         }
 231 #endif
 232
 233         if (p_bridge) {
 234                 PDEBUG(DEBUG_PORT, "Removing us from bridge %u\n", p_bridge->bridge_id);
 235                 remove_bridge(p_bridge, this);
 236         }
 237
 238         if (p_record)
 239                 close_record(0, 0);
 240
 241         dov_exit();
 242
 243         classuse--;
 244
 245         /* disconnect port from endpoint */
 246         while(p_epointlist) {
 247                 /* send disconnect */
 248                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 249                 message->param.disconnectinfo.cause = 16;
 250                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 251                 message_put(message);
 252                 /* remove endpoint */
 253                 free_epointlist(p_epointlist);
 254         }
 255
 256         /* remove port from chain */
 257         temp=port_first;
 258         tempp=&port_first;
 259         while(temp) {
 260                 if (temp == this)
 261                         break;
 262                 tempp = &temp->next;
 263                 temp = temp->next;
 264         }
 265         if (temp == NULL)
 266                 FATAL("PORT(%s) port not in port's list.\n", p_name);
 267         /* detach */
 268         *tempp=this->next;
 269
 270         /* close open tones file */
 271         if (p_tone_fh >= 0) {
 272                 close(p_tone_fh);
 273                 p_tone_fh = -1;
 274                 fhuse--;
 275         }
 276         p_tone_fetched = NULL;
 277 }
 278
 279 PORT_STATE_NAMES
 280
 281 /* set new endpoint state
 282  */
 283 void Port::new_state(int state)
 284 {
 285         PDEBUG(DEBUG_PORT, "PORT(%s) new state %s --> %s\n", p_name, state_name[p_state], state_name[state]);
 286         p_state = state;
 287 }
 288
 289
 290 /*
 291  * find the port with port_id
 292  */
 293 class Port *find_port_id(unsigned int port_id)
 294 {
 295         class Port *port = port_first;
 296
 297         while(port) {
 298 //printf("comparing: '%s' with '%s'\n", name, port->name);
 299                 if (port->p_serial == port_id)
 300                         return(port);
 301                 port = port->next;
 302         }
 303
 304         return(NULL);
 305 }
 306
 307
 308 /*
 309  * set echotest
 310  */
 311 void Port::set_echotest(int echotest)
 312 {
 313         p_echotest = echotest;
 314 }
 315
 316
 317 /*
 318  * set the file in the tone directory with the given name
 319  */
 320 void Port::set_tone(const char *dir, const char *name)
 321 {
 322         int fh;
 323         char filename[128];
 324
 325         if (name == NULL)
 326                 name = "";
 327
 328         if (!dir || !dir[0]) {
 329                 if (p_tones_interface[0])
 330                         dir = p_tones_interface;
 331                 else
 332                         dir = options.tones_dir; /* just in case we have no PmISDN instance */
 333         }
 334
 335         /* no counter, no eof, normal speed */
 336         p_tone_counter = 0;
 337         p_tone_eof = 0;
 338         p_tone_speed = 1;
 339         p_tone_codec = CODEC_LAW;
 340
 341         if (p_tone_fh >= 0) {
 342                 close(p_tone_fh);
 343                 p_tone_fh = -1;
 344                 fhuse--;
 345         }
 346         p_tone_fetched = NULL;
 347
 348         if (name[0]) {
 349                 if (name[0] == '/') {
 350                         SPRINT(p_tone_name, "%s", name);
 351                         p_tone_dir[0] = '\0';
 352                 } else {
 353                         SCPY(p_tone_dir, dir);
 354                         SCPY(p_tone_name, name);
 355                 }
 356                 /* trigger playback */
 357                 update_load();
 358         } else {
 359                 p_tone_name[0]= '\0';
 360                 p_tone_dir[0]= '\0';
 361                 return;
 362         }
 363
 364         if (!!strncmp(name,"cause_",6))
 365                 return;
 366
 367         /* now we check if the cause exists, otherwhise we use error tone. */
 368         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, 0, 0))) {
 369                 p_tone_fetched = NULL;
 370                 return;
 371         }
 372         SPRINT(filename, "%s_loop", p_tone_name);
 373         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, 0, 0))) {
 374                 p_tone_fetched = NULL;
 375                 return;
 376         }
 377         SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 378         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 379                 close(fh);
 380                 return;
 381         }
 382         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 383         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 384                 close(fh);
 385                 return;
 386         }
 387
 388         if (!strcmp(name,"cause_00") || !strcmp(name,"cause_10")) {
 389                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using release tone\n", p_name, name+6);
 390                 SPRINT(p_tone_name,"release");
 391         } else
 392         if (!strcmp(name,"cause_11")) {
 393                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using busy tone\n", p_name, name+6);
 394                 SPRINT(p_tone_name,"busy");
 395         } else {
 396                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using error tone\n", p_name, name+6);
 397                 SPRINT(p_tone_name,"error");
 398         }
 399 }
 400
 401
 402 void Port::set_display(const char *text)
 403 {
 404 }
 405
 406 /*
 407  * set the file in the tone directory for vbox playback
 408  * also set the play_eof-flag
 409  */
 410 void Port::set_vbox_tone(const char *dir, const char *name)
 411 {
 412         char filename[256];
 413
 414         p_tone_speed = 1;
 415         p_tone_counter = 0;
 416         p_tone_codec = CODEC_LAW;
 417         p_tone_eof = 1;
 418
 419         if (p_tone_fh >= 0) {
 420                 close(p_tone_fh);
 421                 p_tone_fh = -1;
 422                 fhuse--;
 423         }
 424         p_tone_fetched = NULL;
 425
 426         SPRINT(p_tone_dir,  dir);
 427         SPRINT(p_tone_name,  name);
 428         /* trigger playback */
 429         update_load();
 430
 431         /* now we check if the cause exists, otherwhise we use error tone. */
 432         if (p_tone_dir[0]) {
 433                 if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 434                         PDEBUG(DEBUG_PORT, "PORT(%s) opening fetched tone: %s\n", p_name, p_tone_name);
 435                         return;
 436                 }
 437                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 438                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 439                         fhuse++;
 440                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 441                         return;
 442                 }
 443         } else {
 444                 SPRINT(filename, "%s", p_tone_name);
 445                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 446                         fhuse++;
 447                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 448                         return;
 449                 }
 450         }
 451 }
 452
 453
 454 /*
 455  * set the file in the given directory for vbox playback
 456  * also set the eof-flag
 457  * also set the counter-flag
 458  */
 459 void Port::set_vbox_play(const char *name, int offset)
 460 {
 461         struct lcr_msg *message;
 462
 463         /* use ser_box_tone() */
 464         set_vbox_tone("", name);
 465         if (p_tone_fh < 0)
 466                 return;
 467
 468         /* enable counter */
 469         p_tone_counter = 1;
 470
 471         /* seek */
 472         if (p_tone_name[0]) {
 473                 /* send message with counter value */
 474                 if (p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 475                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 476                         message->param.counter.current = offset;
 477                         message->param.counter.max = p_tone_size;
 478                         message_put(message);
 479                 }
 480         }
 481 }
 482
 483
 484 /*
 485  * set the playback speed (for recording playback with different speeds)
 486  */
 487 void Port::set_vbox_speed(int speed)
 488 {
 489         /* enable vbox play mode */
 490         p_tone_speed = speed;
 491 }
 492
 493 /*
 494  * read from the given file as specified in port_set_tone and return sample data
 495  * if the tone ends, the result may be less samples than requested
 496  */
 497 int Port::read_audio(unsigned char *buffer, int length)
 498 {
 499         int l = 0,len;
 500         int nodata=0; /* to detect 0-length files and avoid endless reopen */
 501         char filename[128];
 502         int tone_left_before; /* temp variable to determine the change in p_tone_left */
 503
 504         /* nothing */
 505         if (length == 0)
 506                 return(0);
 507
 508         len = length;
 509
 510         /* if there is no tone set, use silence */
 511         if (!p_tone_name[0])
 512                 return(0);
 513
 514         /* if the file pointer is not open, we open it */
 515         if (p_tone_fh<0 && p_tone_fetched==NULL) {
 516                 if (p_tone_dir[0]) {
 517                         SPRINT(filename, "%s", p_tone_name);
 518                         /* if file does not exist */
 519                         if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 520                                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 521                                 /* if file does not exist */
 522                                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 523                                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 524                                         goto try_loop;
 525                                 }
 526                                 fhuse++;
 527                         }
 528                 } else {
 529                         SPRINT(filename, "%s", p_tone_name);
 530                         /* if file does not exist */
 531                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 532                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 533                                 goto try_loop;
 534                         }
 535                         fhuse++;
 536                 }
 537                 PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 538         }
 539
 540 read_more:
 541         /* file descriptor is open read data */
 542         tone_left_before = p_tone_left;
 543         if (p_tone_fh >= 0) {
 544                 l = read_tone(p_tone_fh, buffer, p_tone_codec, len, p_tone_size, &p_tone_left, p_tone_speed);
 545                 if (l<0 || l>len) /* paranoia */
 546                         l=0;
 547                 buffer += l;
 548                 len -= l;
 549         }
 550         if (p_tone_fetched) {
 551                 l = read_tone_fetched(&p_tone_fetched, buffer, len, p_tone_size, &p_tone_left, p_tone_speed);
 552                 if (l<0 || l>len) /* paranoia */
 553                         l=0;
 554                 buffer += l;
 555                 len -= l;
 556         }
 557
 558         /* if counter is enabled, we check if we have a change */
 559         if (p_tone_counter && p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 560                 /* if we jumed to the next second */
 561                 if (((p_tone_size-p_tone_left)/8000) != (p_tone_size-tone_left_before)/8000) {
 562 //printf("\nsize=%d left=%d\n\n",p_tone_size,p_tone_left);
 563                         struct lcr_msg *message;
 564                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 565                         message->param.counter.current = (p_tone_size-p_tone_left)/8000;
 566                         message->param.counter.max = -1;
 567                         message_put(message);
 568                 }
 569         }
 570
 571         if (len==0)
 572                 return(length-len);
 573
 574         if (p_tone_fh >= 0) {
 575                 close(p_tone_fh);
 576                 p_tone_fh = -1;
 577                 fhuse--;
 578         }
 579         p_tone_fetched = NULL;
 580
 581         if (l)
 582                 nodata=0;
 583
 584         /* if the file has 0-length */
 585         if (nodata>1) {
 586                 PDEBUG(DEBUG_PORT, "PORT(%s) 0-length loop: %s\n", p_name, filename);
 587                 p_tone_name[0]=0;
 588                 p_tone_dir[0]=0;
 589                 return(length-len);
 590         }
 591
 592         /* if eof is reached, or if the normal file cannot be opened, continue with the loop file if possible */
 593 try_loop:
 594         if (p_tone_eof && ACTIVE_EPOINT(p_epointlist)) {
 595                 struct lcr_msg *message;
 596                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_EOF);
 597                 message_put(message);
 598         }
 599
 600         if (p_tone_dir[0]) {
 601                 /* if file does not exist */
 602                 SPRINT(filename, "%s_loop", p_tone_name);
 603                 if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 604                         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 605                         /* if file does not exist */
 606                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 607                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 608                                 p_tone_dir[0] = '\0';
 609                                 p_tone_name[0] = '\0';
 610                                 return(length-len);
 611                         }
 612                         fhuse++;
 613                 }
 614         } else {
 615                 SPRINT(filename, "%s_loop", p_tone_name);
 616                 /* if file does not exist */
 617                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 618                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 619                         p_tone_dir[0] = '\0';
 620                         p_tone_name[0] = '\0';
 621                         return(length-len);
 622                 }
 623                 fhuse++;
 624         }
 625         nodata++;
 626         PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 627
 628         /* now we have opened the loop */
 629         goto read_more;
 630 }
 631
 632
 633 /* Endpoint sends messages to the port
 634  * This is called by the message_epoint, inherited by child classes.
 635  * Therefor a return 1 means: "already handled here"
 636  */
 637 //extern struct lcr_msg *dddebug;
 638 int Port::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 639 {
 640         /* check if we got audio data from one remote port */
 641         switch(message_id) {
 642         case MESSAGE_TONE: /* play tone */
 643                 PDEBUG(DEBUG_PORT, "PORT(%s) setting tone '%s' dir '%s'\n", p_name, param->tone.name, param->tone.dir);
 644                 set_tone(param->tone.dir,param->tone.name);
 645                 return 1;
 646
 647         case MESSAGE_VBOX_TONE: /* play tone of answering machine */
 648                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine tone '%s' '%s'\n", p_name, param->tone.dir, param->tone.name);
 649                 set_vbox_tone(param->tone.dir, param->tone.name);
 650                 return 1;
 651
 652         case MESSAGE_VBOX_PLAY: /* play recording of answering machine */
 653                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine file to play '%s' (offset %d seconds)\n", p_name, param->play.file, param->play.offset);
 654                 set_vbox_play(param->play.file, param->play.offset);
 655                 return 1;
 656
 657         case MESSAGE_VBOX_PLAY_SPEED: /* set speed of playback (recording of answering machine) */
 658                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine playback speed %d (times)\n", p_name, param->speed);
 659                 set_vbox_speed(param->speed);
 660                 return 1;
 661
 662         case MESSAGE_BRIDGE: /* create / join / leave / destroy bridge */
 663                 PDEBUG(DEBUG_PORT, "PORT(%s) bridging to id %d\n", p_name, param->bridge_id);
 664                 bridge(param->bridge_id);
 665                 return 1;
 666
 667 #ifdef WITH_VOOTP
 668         case MESSAGE_VOOTP: /* enable / disable VoOTP */
 669                 PDEBUG(DEBUG_PORT, "PORT(%s) VoOTP enabled: %d\n", p_name, param->vootp.enable);
 670                 set_vootp(&param->vootp);
 671                 return 1;
 672 #endif
 673
 674         case MESSAGE_DOV_REQUEST: /* Data-Over-Voice message */
 675                 PDEBUG(DEBUG_PORT, "PORT(%s) sending data over voice message (len=%d)\n", p_name, param->dov.length);
 676                 dov_sendmsg(param->dov.data, param->dov.length, (enum dov_type)param->dov.type, param->dov.level);
 677                 return 1;
 678
 679         case MESSAGE_DOV_LISTEN: /* Data-Over-Voice listen order */
 680                 PDEBUG(DEBUG_PORT, "PORT(%s) sending data over voice listen order\n", p_name);
 681                 dov_listen((enum dov_type)param->dov.type);
 682                 return 1;
 683         }
 684
 685         return 0;
 686 }
 687
 688
 689 /* wave header structure */
 690 struct fmt {
 691         unsigned short  stereo; /* 1 = mono, 2 = stereo */
 692         unsigned short  channels; /* number of channels */
 693         unsigned int    sample_rate; /* sample rate */
 694         unsigned int    data_rate; /* data rate */
 695         unsigned short  bytes_sample; /* bytes per sample (all channels) */
 696         unsigned short  bits_sample; /* bits per sample (one channel) */
 697 };
 698
 699
 700 /*
 701  * open record file (actually a wave file with empty header which will be
 702  * written before close, because we do not know the size yet)
 703  * type=1 record annoucement,  type=0 record audio stream, type=2 record vbox
 704  */
 705 int Port::open_record(int type, int vbox, int skip, char *extension, int anon_ignore, const char *vbox_email, int vbox_email_file)
 706 {
 707         /* RIFFxxxxWAVEfmt xxxx(fmt-size)dataxxxx... */
 708         char dummyheader[8+4+8+sizeof(fmt)+8];
 709         char filename[256];
 710         time_t now;
 711         struct tm *now_tm;
 712         int __attribute__((__unused__)) ret;
 713
 714         if (!extension) {
 715                 PERROR("Port(%d) not an extension\n", p_serial);
 716                 return(0);
 717         }
 718         SCPY(p_record_extension, extension);
 719         p_record_anon_ignore = anon_ignore;
 720         SCPY(p_record_vbox_email, vbox_email);
 721         p_record_vbox_email_file = vbox_email_file;
 722
 723         if (p_record) {
 724                 PERROR("Port(%d) already recording\n", p_serial);
 725                 return(0);
 726         }
 727
 728         if (vbox != 0)
 729                 SPRINT(filename, "%s/%s/vbox", EXTENSION_DATA, p_record_extension);
 730         else
 731                 SPRINT(filename, "%s/%s/recordings", EXTENSION_DATA, p_record_extension);
 732         if (mkdir(filename, 0755) < 0) {
 733                 if (errno != EEXIST) {
 734                         PERROR("Port(%d) cannot create directory '%s'\n", p_serial, filename);
 735                         return(0);
 736                 }
 737         }
 738
 739         if (vbox == 1)
 740                 UPRINT(strchr(filename,'\0'), "/announcement");
 741         else {
 742                 time(&now);
 743                 now_tm = localtime(&now);
 744                 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);
 745         }
 746         if (vbox == 2) {
 747                 p_record_vbox_year = now_tm->tm_year;
 748                 p_record_vbox_mon = now_tm->tm_mon;
 749                 p_record_vbox_mday = now_tm->tm_mday;
 750                 p_record_vbox_hour = now_tm->tm_hour;
 751                 p_record_vbox_min = now_tm->tm_min;
 752         }
 753
 754         /* check, if file exists (especially when an extension calls the same extension) */
 755         if (vbox != 1)
 756         if ((p_record = fopen(filename, "r"))) {
 757                 fclose(p_record);
 758                 SCAT(filename, "_2nd");
 759         }
 760
 761         p_record = fopen(filename, "w");
 762         if (!p_record) {
 763                 PERROR("Port(%d) cannot record because file cannot be opened '%s'\n", p_serial, filename);
 764                 return(0);
 765         }
 766         update_rxoff();
 767         fduse++;
 768
 769         p_record_type = type;
 770         p_record_vbox = vbox;
 771         p_record_skip = skip;
 772         p_record_length = 0;
 773         switch(p_record_type) {
 774                 case CODEC_MONO:
 775                 case CODEC_STEREO:
 776                 case CODEC_8BIT:
 777                 memset(&dummyheader, 0, sizeof(dummyheader));
 778                 ret = fwrite(dummyheader, sizeof(dummyheader), 1, p_record);
 779                 break;
 780
 781                 case CODEC_LAW:
 782                 break;
 783         }
 784         UCPY(p_record_filename, filename);
 785
 786         PDEBUG(DEBUG_PORT, "Port(%d) recording started with file name '%s'\n", p_serial, filename);
 787         return(1);
 788 }
 789
 790
 791 /*
 792  * close the recoding file, put header in front and rename
 793  */
 794 void Port::close_record(int beep, int mute)
 795 {
 796         static signed short beep_mono[256];
 797         unsigned int size = 0, wsize = 0;
 798         struct fmt fmt;
 799         char filename[512], indexname[512];
 800         FILE *fp;
 801         int i, ii;
 802         char number[256], callerid[256];
 803         char *p;
 804         struct caller_info callerinfo;
 805         const char *valid_chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890_.-!$%&/()=+*;~";
 806         int __attribute__((__unused__)) ret;
 807
 808         if (!p_record)
 809                 return;
 810         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);
 811
 812         memcpy(&callerinfo, &p_callerinfo, sizeof(struct caller_info));
 813 //      apply_callerid_restriction(p_record_anon_ignore, callerinfo.id, &callerinfo.ntype, &callerinfo.present, &callerinfo.screen, callerinfo.extension, callerinfo.name);
 814
 815         SCPY(number, p_dialinginfo.id);
 816         SCPY(callerid, numberrize_callerinfo(callerinfo.id, callerinfo.ntype, options.national, options.international));
 817         if (callerid[0] == '\0') {
 818                 if (callerinfo.present == INFO_PRESENT_RESTRICTED)
 819                         UCPY(callerid,"anonymous");
 820                 else
 821                         UCPY(callerid,"unknown");
 822         }
 823
 824         /* change verboten digits */
 825         p = callerid;
 826         while((p=strchr(p,'*')))
 827                 *(p++) = 'x';
 828         p = callerid;
 829         while((p=strchr(p,'/')))
 830                 *(p++) = 'x';
 831         p = number;
 832         while((p=strchr(p,'*')))
 833                 *(p++) = 'x';
 834         p = number;
 835         while((p=strchr(p,'/')))
 836                 *(p++) = 'x';
 837         i = 0;
 838         ii = strlen(callerid);
 839         while(i < ii) {
 840                 if (!strchr(valid_chars, callerid[i]))
 841                         callerid[i] = '_';
 842                 i++;
 843         }
 844         i = 0;
 845         ii = strlen(number);
 846         while(i < ii) {
 847                 if (!strchr(valid_chars, number[i]))
 848                         number[i] = '_';
 849                 i++;
 850         }
 851
 852         /* mute */
 853         if (mute && p_record_type==CODEC_MONO) {
 854                 i = p_record_length;
 855                 if (i > mute)
 856                         i = mute;
 857                 fseek(p_record, -(i<<1), SEEK_END);
 858                 p_record_length -= (i<<1);
 859         }
 860         /* add beep to the end of recording */
 861         if (beep && p_record_type==CODEC_MONO) {
 862                 i = 0;
 863                 while(i < 256) {
 864                         beep_mono[i] = (signed short)(sin((double)i / 5.688888888889 * 2.0 * 3.1415927) * 2000.0);
 865                         i++;
 866                 }
 867                 i = 0;
 868                 while(i < beep) {
 869                         ret = fwrite(beep_mono, sizeof(beep_mono), 1, p_record);
 870                         i += sizeof(beep_mono);
 871                         p_record_length += sizeof(beep_mono);
 872                 }
 873         }
 874
 875         /* complete header */
 876         switch(p_record_type) {
 877                 case CODEC_MONO:
 878                 case CODEC_STEREO:
 879                 case CODEC_8BIT:
 880                 /* cue */
 881                 fprintf(p_record, "cue %c%c%c%c%c%c%c%c", 4, 0, 0, 0, 0,0,0,0);
 882
 883                 /* LIST */
 884                 fprintf(p_record, "LIST%c%c%c%cadtl", 4, 0, 0, 0);
 885
 886                 /* go to header */
 887                 fseek(p_record, 0, SEEK_SET);
 888
 889                 /* WAVEfmt xxxx(fmt-size)dataxxxx[data]cue xxxx0000LISTxxxxadtl*/
 890                 size = p_record_length;
 891                 wsize = 4+8+sizeof(fmt)+8+size+8+4+8+4;
 892
 893                 /* RIFF */
 894                 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));
 895
 896                 /* WAVE */
 897                 fprintf(p_record, "WAVE");
 898
 899                 /* fmt */
 900                 fprintf(p_record, "fmt %c%c%c%c", (unsigned int)sizeof(fmt), 0, 0, 0);
 901                 switch(p_record_type) {
 902                         case CODEC_MONO:
 903                         fmt.stereo = 1;
 904                         fmt.channels = 1;
 905                         fmt.sample_rate = 8000; /* samples/sec */
 906                         fmt.data_rate = 16000; /* full data rate */
 907                         fmt.bytes_sample = 2; /* all channels */
 908                         fmt.bits_sample = 16; /* one channel */
 909                         break;
 910
 911                         case CODEC_STEREO:
 912                         fmt.stereo = 1;
 913                         fmt.channels = 2;
 914                         fmt.sample_rate = 8000; /* samples/sec */
 915                         fmt.data_rate = 32000; /* full data rate */
 916                         fmt.bytes_sample = 4; /* all channels */
 917                         fmt.bits_sample = 16; /* one channel */
 918                         break;
 919
 920                         case CODEC_8BIT:
 921                         fmt.stereo = 1;
 922                         fmt.channels = 1;
 923                         fmt.sample_rate = 8000; /* samples/sec */
 924                         fmt.data_rate = 8000; /* full data rate */
 925                         fmt.bytes_sample = 1; /* all channels */
 926                         fmt.bits_sample = 8; /* one channel */
 927                         break;
 928                 }
 929                 ret = fwrite(&fmt, sizeof(fmt), 1, p_record);
 930
 931                 /* data */
 932                 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));
 933
 934                 /* rename file */
 935                 if (p_record_vbox == 1)
 936                         SPRINT(filename, "%s.wav", p_record_filename);
 937                 else
 938                         SPRINT(filename, "%s_%s-%s.wav", p_record_filename, callerid, number);
 939                 break;
 940
 941                 case CODEC_LAW:
 942                 /* rename file */
 943                 if (p_record_vbox == 1)
 944                         SPRINT(filename, "%s.isdn", p_record_filename);
 945                 else
 946                         SPRINT(filename, "%s_%s-%s.isdn", p_record_filename, callerid, number);
 947                 break;
 948         }
 949
 950         fclose(p_record);
 951         fduse--;
 952         p_record = NULL;
 953         update_rxoff();
 954
 955         if (rename(p_record_filename, filename) < 0) {
 956                 PERROR("Port(%d) cannot rename from '%s' to '%s'\n", p_serial, p_record_filename, filename);
 957                 return;
 958         }
 959
 960         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);
 961
 962         if (p_record_vbox == 2) {
 963                 SPRINT(indexname, "%s/%s/vbox/index", EXTENSION_DATA, p_record_extension);
 964                 if ((fp = fopen(indexname,"a"))) {
 965                         fduse++;
 966
 967                         /* remove path from file name */
 968                         p = filename;
 969                         while(strchr(p, '/'))
 970                                 p = strchr(p, '/')+1;
 971                         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);
 972
 973                         fclose(fp);
 974                         fduse--;
 975                 } else {
 976                         PERROR("Port(%d) cannot open index file '%s' to append.\n", p_serial, indexname);
 977                 }
 978
 979                 /* send email with sample*/
 980                 if (p_record_vbox_email[0]) {
 981                         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);
 982                 }
 983         }
 984 }
 985
 986
 987 /*
 988  * recording function
 989  * Records all data from down and from up into one single stream.
 990  * Both streams may have gaps or jitter.
 991  * A Jitter buffer for both streams is used to compensate jitter.
 992  *
 993  * If one stream (dir) received packets, they are stored to a
 994  * buffer to wait for the other stream (dir), so both streams can
 995  * be combined. If the buffer is full, it's content is written
 996  * without mixing stream. (assuming only one stram (dir) exists.)
 997  * A flag is used to indicate what stream is currently in buffer.
 998  *
 999  * NOTE: First stereo sample (odd) is from down, second is from up.
1000  */
1001 void Port::record(unsigned char *data, int length, int dir_fromup)
1002 {
1003         unsigned char write_buffer[1024], *d;
1004         signed short *s;
1005         int free, i, ii;
1006         signed int sample;
1007         int __attribute__((__unused__)) ret;
1008
1009         /* no recording */
1010         if (!p_record || !length)
1011                 return;
1012
1013         /* skip data from local caller (dtmf input) */
1014         if (p_record_skip && !dir_fromup) {
1015                 /* more to skip than we have */
1016                 if (p_record_skip > length) {
1017                         p_record_skip -= length;
1018                         return;
1019                 }
1020                 /* less to skip */
1021                 data += p_record_skip;
1022                 length -= p_record_skip;
1023                 p_record_skip = 0;
1024         }
1025
1026 //printf("dir=%d len=%d\n", dir_fromup, length);
1027
1028         free = ((p_record_buffer_readp - p_record_buffer_writep - 1) & RECORD_BUFFER_MASK);
1029
1030 //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);
1031
1032         /* the buffer stores the same data stream */
1033         if (dir_fromup == p_record_buffer_dir) {
1034 same_again:
1035
1036 //printf("same free=%d length=%d\n", free, length);
1037                 /* first write what we can to the buffer */
1038                 while(free && length) {
1039                         p_record_buffer[p_record_buffer_writep] = audio_law_to_s32[*data++];
1040                         p_record_buffer_writep = (p_record_buffer_writep + 1) & RECORD_BUFFER_MASK;
1041                         free--;
1042                         length--;
1043                 }
1044                 /* all written, so we return */
1045                 if (!length)
1046                         return;
1047                 /* still data left, buffer is full, so we need to write a chunk to file */
1048                 switch(p_record_type) {
1049                         case CODEC_MONO:
1050                         s = (signed short *)write_buffer;
1051                         i = 0;
1052                         while(i < 256) {
1053                                 *s++ = p_record_buffer[p_record_buffer_readp];
1054                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1055                                 i++;
1056                         }
1057                         ret = fwrite(write_buffer, 512, 1, p_record);
1058                         p_record_length += 512;
1059                         break;
1060
1061                         case CODEC_STEREO:
1062                         s = (signed short *)write_buffer;
1063                         if (p_record_buffer_dir) {
1064                                 i = 0;
1065                                 while(i < 256) {
1066                                         *s++ = 0; /* nothing from down */
1067                                         *s++ = p_record_buffer[p_record_buffer_readp];
1068                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1069                                         i++;
1070                                 }
1071                         } else {
1072                                 i = 0;
1073                                 while(i < 256) {
1074                                         *s++ = p_record_buffer[p_record_buffer_readp];
1075                                         *s++ = 0; /* nothing from up */
1076                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1077                                         i++;
1078                                 }
1079                         }
1080                         ret = fwrite(write_buffer, 1024, 1, p_record);
1081                         p_record_length += 1024;
1082                         break;
1083
1084                         case CODEC_8BIT:
1085                         d = write_buffer;
1086                         i = 0;
1087                         while(i < 256) {
1088                                 *d++ = ((unsigned short)(p_record_buffer[p_record_buffer_readp]+0x8000)) >> 8;
1089                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1090                                 i++;
1091                         }
1092                         ret = fwrite(write_buffer, 512, 1, p_record);
1093                         p_record_length += 512;
1094                         break;
1095
1096                         case CODEC_LAW:
1097                         d = write_buffer;
1098                         i = 0;
1099                         while(i < 256) {
1100                                 *d++ = audio_s16_to_law[p_record_buffer[p_record_buffer_readp] & 0xffff];
1101                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1102                                 i++;
1103                         }
1104                         ret = fwrite(write_buffer, 256, 1, p_record);
1105                         p_record_length += 256;
1106                         break;
1107                 }
1108                 /* because we still have data, we write again */
1109                 free += 256;
1110                 goto same_again;
1111         }
1112         /* the buffer stores the other stream */
1113
1114 different_again:
1115         /* if buffer empty, change it */
1116         if (p_record_buffer_readp == p_record_buffer_writep) {
1117                 p_record_buffer_dir = dir_fromup;
1118                 goto same_again;
1119         }
1120         /* how much data can we mix ? */
1121         ii = (p_record_buffer_writep - p_record_buffer_readp) & RECORD_BUFFER_MASK;
1122         if (length < ii)
1123                 ii = length;
1124
1125         if (ii > 256)
1126                 ii = 256;
1127 //printf("same ii=%d length=%d\n", ii, length);
1128 //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);
1129
1130         /* write data mixed with the buffer */
1131         switch(p_record_type) {
1132                 case CODEC_MONO:
1133                 s = (signed short *)write_buffer;
1134                 i = 0;
1135                 while(i < ii) {
1136                         sample = p_record_buffer[p_record_buffer_readp]
1137                                 + audio_law_to_s32[*data++];
1138                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1139                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1140                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1141                         *s++ = sample;
1142                         i++;
1143                 }
1144                 ret = fwrite(write_buffer, ii<<1, 1, p_record);
1145                 p_record_length += (ii<<1);
1146                 break;
1147
1148                 case CODEC_STEREO:
1149                 s = (signed short *)write_buffer;
1150                 if (p_record_buffer_dir) {
1151                         i = 0;
1152                         while(i < ii) {
1153                                 *s++ = audio_law_to_s32[*data++];
1154                                 *s++ = p_record_buffer[p_record_buffer_readp];
1155                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1156                                 i++;
1157                         }
1158                 } else {
1159                         i = 0;
1160                         while(i < ii) {
1161                                 *s++ = p_record_buffer[p_record_buffer_readp];
1162                                 *s++ = audio_law_to_s32[*data++];
1163                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1164                                 i++;
1165                         }
1166                 }
1167                 ret = fwrite(write_buffer, ii<<2, 1, p_record);
1168                 p_record_length += (ii<<2);
1169                 break;
1170
1171                 case CODEC_8BIT:
1172                 d = write_buffer;
1173                 i = 0;
1174                 while(i < ii) {
1175                         sample = p_record_buffer[p_record_buffer_readp]
1176                                 + audio_law_to_s32[*data++];
1177                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1178                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1179                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1180                         *d++ = (sample+0x8000) >> 8;
1181                         i++;
1182                 }
1183                 ret = fwrite(write_buffer, ii, 1, p_record);
1184                 p_record_length += ii;
1185                 break;
1186
1187                 case CODEC_LAW:
1188                 d = write_buffer;
1189                 i = 0;
1190                 while(i < ii) {
1191                         sample = p_record_buffer[p_record_buffer_readp]
1192                                 + audio_law_to_s32[*data++];
1193                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1194                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1195                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1196                         *d++ = audio_s16_to_law[sample & 0xffff];
1197                         i++;
1198                 }
1199                 ret = fwrite(write_buffer, ii, 1, p_record);
1200                 p_record_length += ii;
1201                 break;
1202         }
1203         length -= ii;
1204         /* still data */
1205         if (length)
1206                 goto different_again;
1207         /* no data (maybe buffer) */
1208         return;
1209
1210 }
1211
1212 void Port::tap(unsigned char *data, int length, int dir_fromup)
1213 {
1214 }
1215
1216 void Port::update_rxoff(void)
1217 {
1218 }
1219
1220 void Port::update_load(void)
1221 {
1222 }
1223
1224
1225 /*
1226  * bridge handling
1227  */
1228
1229 int bridge_timeout(struct lcr_timer *timer, void *instance, int index);
1230
1231 static void remove_bridge(struct port_bridge *bridge, class Port *port)
1232 {
1233         struct port_bridge **temp = &p_bridge_first;
1234         while (*temp) {
1235                 if (*temp == bridge) {
1236                         struct port_bridge_member **memberp = &bridge->first, *member;
1237
1238                         /* loop until we are found */
1239                         while(*memberp) {
1240                                 if ((*memberp)->port == port) {
1241                                         member = *memberp;
1242                                         *memberp = member->next;
1243                                         FREE(member, sizeof(struct port_bridge_member));
1244                                         memuse--;
1245 #ifndef TEST_CONFERENCE
1246                                         if (bridge->first && bridge->first->next && !bridge->first->next->next) {
1247 #else
1248                                         if (bridge->first && !bridge->first->next) {
1249 #endif
1250                                                 PDEBUG(DEBUG_PORT, "bridge %u is no conference anymore\n", bridge->bridge_id);
1251                                                 del_timer(&bridge->timer);
1252                                         }
1253                                         break;
1254                                 }
1255                                 memberp = &((*memberp)->next);
1256                         }
1257                         /* if bridge is empty, remove it */
1258                         if (bridge->first == NULL) {
1259                                 PDEBUG(DEBUG_PORT, "Remove bridge %u\n", bridge->bridge_id);
1260                                 *temp = bridge->next;
1261                                 FREE(bridge, sizeof(struct port_bridge));
1262                                 memuse--;
1263                         }
1264                         return;
1265                 }
1266                 temp = &((*temp)->next);
1267         }
1268         PERROR("Bridge %p not found in list\n", bridge);
1269 }
1270
1271 void Port::bridge(unsigned int bridge_id)
1272 {
1273         struct port_bridge_member **memberp;
1274
1275         /* Remove bridge, if we leave bridge or if we join a different bridge. */
1276         if (p_bridge && bridge_id != p_bridge->bridge_id) {
1277                 PDEBUG(DEBUG_PORT, "Remove port %u from bridge %u, because out new bridge is %u\n", p_serial, p_bridge->bridge_id, bridge_id);
1278                 remove_bridge(p_bridge, this);
1279                 p_bridge = NULL;
1280         }
1281
1282         /* if we leave bridge */
1283         if (!bridge_id)
1284                 return;
1285
1286         /* find bridge */
1287         if (!p_bridge) {
1288                 struct port_bridge *temp = p_bridge_first;
1289
1290                 while (temp) {
1291                         if (temp->bridge_id == bridge_id)
1292                                 break;
1293                         temp = temp->next;
1294                 }
1295                 p_bridge = temp;
1296                 if (p_bridge)
1297                         PDEBUG(DEBUG_PORT, "Port %d found existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1298         }
1299
1300         /* create bridge */
1301         if (!p_bridge) {
1302                 struct port_bridge **temp = &p_bridge_first;
1303
1304                 p_bridge = (struct port_bridge *) MALLOC(sizeof(struct port_bridge));
1305                 memuse++;
1306                 p_bridge->bridge_id = bridge_id;
1307
1308                 /* attach bridge instance to list */
1309                 while (*temp)
1310                         temp = &((*temp)->next);
1311                 *temp = p_bridge;
1312                 PDEBUG(DEBUG_PORT, "Port %d creating not existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1313         }
1314
1315         /* attach to bridge */
1316         memberp = &p_bridge->first;
1317         while(*memberp) {
1318                 if ((*memberp)->port == this) {
1319                         /* already joined */
1320                         return;
1321                 }
1322                 memberp = &((*memberp)->next);
1323         }
1324         *memberp = (struct port_bridge_member *) MALLOC(sizeof(struct port_bridge_member));
1325         memuse++;
1326         (*memberp)->port = this;
1327         /* check if bridge becomes a conference */
1328 #ifndef TEST_CONFERENCE
1329         if (p_bridge->first->next && p_bridge->first->next->next && !p_bridge->first->next->next->next) {
1330                 p_bridge->first->next->next->write_p = 0;
1331                 p_bridge->first->next->next->min_space = 0;
1332                 memset(p_bridge->first->next->next->buffer, silence, sizeof((*memberp)->buffer));
1333 #else
1334         if (p_bridge->first->next && !p_bridge->first->next->next) {
1335 #endif
1336                 p_bridge->first->next->write_p = 0;
1337                 p_bridge->first->next->min_space = 0;
1338                 memset(p_bridge->first->next->buffer, silence, sizeof((*memberp)->buffer));
1339                 p_bridge->first->write_p = 0;
1340                 p_bridge->first->min_space = 0;
1341                 memset(p_bridge->first->buffer, silence, sizeof((*memberp)->buffer));
1342                 memset(p_bridge->sum_buffer, 0, sizeof(p_bridge->sum_buffer));
1343                 p_bridge->read_p = 0;
1344                 add_timer(&p_bridge->timer, bridge_timeout, p_bridge, 0);
1345                 schedule_timer(&p_bridge->timer, 0, 20000); /* 20 MS */
1346                 p_bridge->sample_count = 0;
1347                 PDEBUG(DEBUG_PORT, "bridge %u became a conference\n", p_bridge->bridge_id);
1348         }
1349 }
1350
1351 /* send data to remote Port or add to sum buffer */
1352 int Port::bridge_tx(unsigned char *data, int len)
1353 {
1354         int write_p, space;
1355         struct port_bridge_member *member;
1356         signed long *sum;
1357         unsigned char *buf;
1358
1359 #ifdef WITH_VOOTP
1360         if (p_vootp)
1361                 vootp_encrypt_stream(p_vootp, data, len);
1362 #endif
1363
1364         /* less than two ports, so drop */
1365         if (!p_bridge || !p_bridge->first || !p_bridge->first->next)
1366                 return -EIO;
1367 #ifndef TEST_CONFERENCE
1368         /* two ports, so bridge */
1369         if (!p_bridge->first->next->next) {
1370                 if (p_bridge->first->port == this)
1371                         return p_bridge->first->next->port->bridge_rx(data, len);
1372                 if (p_bridge->first->next->port == this)
1373                         return p_bridge->first->port->bridge_rx(data, len);
1374                 return -EINVAL;
1375         }
1376 #endif
1377         /* more than two ports... */
1378         member = p_bridge->first;
1379         while (member) {
1380                 if (member->port == this)
1381                         break;
1382                 member = member->next;
1383         }
1384         if (!member)
1385                 return -EINVAL;
1386         write_p = member->write_p;
1387         /* calculate space, so write pointer will not overrun (or reach) read pointer in ring buffer */
1388         space = (p_bridge->read_p - write_p - 1) & (BRIDGE_BUFFER - 1);
1389         /* clip len, if it does not fit */
1390         if (space < len)
1391                 len = space;
1392         /* apply audio samples to sum buffer */
1393         sum = p_bridge->sum_buffer;
1394         buf = member->buffer;
1395         while (len--) {
1396                 sum[write_p] += audio_law_to_s32[*data];
1397                 buf[write_p] = *data++;
1398                 write_p = (write_p + 1) & (BRIDGE_BUFFER - 1);
1399         }
1400         /* raise write pointer */
1401         member->write_p = write_p;
1402
1403         return 0;
1404 }
1405
1406 int bridge_timeout(struct lcr_timer *timer, void *instance, int index)
1407 {
1408         struct port_bridge *bridge = (struct port_bridge *)instance;
1409         struct port_bridge_member *member = bridge->first;
1410         unsigned long long timer_time;
1411         signed long *sum, sample;
1412         unsigned char buffer[160], *buf, *d;
1413         int i, read_p, space;
1414
1415         bridge->sample_count += 160;
1416
1417         /* schedule exactly 20ms from last schedule */
1418         timer_time = timer->timeout.tv_sec * MICRO_SECONDS + timer->timeout.tv_usec;
1419         timer_time += 20000; /* 20 MS */
1420         timer->timeout.tv_sec = timer_time / MICRO_SECONDS;
1421         timer->timeout.tv_usec = timer_time % MICRO_SECONDS;
1422         timer->active = 1;
1423
1424         while (member) {
1425                 /* calculate transmit data */
1426                 read_p = bridge->read_p;
1427                 sum = bridge->sum_buffer;
1428                 buf = member->buffer;
1429                 d = buffer;
1430                 for (i = 0; i < 160; i++) {
1431                         sample = sum[read_p];
1432                         sample -= audio_law_to_s32[buf[read_p]];
1433                         buf[read_p] = silence;
1434                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1435                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1436                         *d++ = audio_s16_to_law[sample & 0xffff];
1437                         read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1438                 }
1439                 /* send data */
1440                 member->port->bridge_rx(buffer, 160);
1441                 /* raise write pointer, if read pointer would overrun them */
1442                 space = ((member->write_p - bridge->read_p) & (BRIDGE_BUFFER - 1)) - 160;
1443                 if (space < 0) {
1444                         space = 0;
1445                         member->write_p = read_p;
1446 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has buffer underrun\n", bridge->bridge_id, member->port->p_serial);
1447                 }
1448                 /* find minimum delay */
1449                 if (space < member->min_space)
1450                         member->min_space = space;
1451                 /* check if we should reduce buffer */
1452                 if (bridge->sample_count >= 8000*5) {
1453                         /* reduce buffer by minimum delay */
1454 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has min space of %d samples\n", bridge->bridge_id, member->port->p_serial, member->min_space);
1455                         member->write_p = (member->write_p - member->min_space) & (BRIDGE_BUFFER - 1);
1456                         member->min_space = 1000000; /* infinite */
1457                 }
1458                 member = member->next;
1459         }
1460
1461         /* clear sample data */
1462         read_p = bridge->read_p;
1463         sum = bridge->sum_buffer;
1464         for (i = 0; i < 160; i++) {
1465                 sum[read_p] = 0;
1466                 read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1467         }
1468
1469         /* raise read pointer */
1470         bridge->read_p = read_p;
1471
1472         if (bridge->sample_count >= 8000*5)
1473                 bridge->sample_count = 0;
1474
1475         return 0;
1476 }
1477
1478
1479 /* receive data from remote Port */
1480 int Port::bridge_rx(unsigned char *data, int len)
1481 {
1482
1483 #ifdef WITH_VOOTP
1484         if (p_vootp)
1485                 vootp_decrypt_stream(p_vootp, data, len);
1486 #endif
1487
1488         return 0;
1489 }
1490
1491 #ifdef WITH_VOOTP
1492 static void vootp_info(void *priv, const char *text)
1493 {
1494         class Port *port = (class Port *)priv;
1495         char display[strlen(text) + 1];
1496
1497         SCPY(display, text);
1498         if (display[0])
1499                 display[strlen(display) - 1] = '\0';
1500
1501         port->set_display(display);
1502 }
1503
1504 void Port::set_vootp(struct param_vootp *vootp)
1505 {
1506         if (p_vootp) {
1507                 vootp_destroy(p_vootp);
1508                 p_vootp = NULL;
1509         }
1510         if (vootp->enable) {
1511                 p_vootp = vootp_create(this, (options.law=='a'), options.otp_dir, NULL, NULL, vootp->id, vootp_info);
1512 //              vootp_loglevel(VOOTP_LOGL_DEBUG);
1513                 if (!p_vootp) {
1514                         struct lcr_msg *message;
1515
1516                         message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_VOOTP);
1517                         message->param.vootp.failed = 1;
1518                         message_put(message);
1519                 }
1520         }
1521 }
1522 #endif