channels/chan_phone.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief Generic Linux Telephony Interface driver
  22  *
  23  * \author Mark Spencer <markster@digium.com>
  24  *
  25  * \ingroup channel_drivers
  26  */
  27
  28 /*! \li \ref chan_phone.c uses the configuration file \ref phone.conf
  29  * \addtogroup configuration_file
  30  */
  31
  32 /*! \page phone.conf phone.conf
  33  * \verbinclude phone.conf.sample
  34  */
  35
  36 /*** MODULEINFO
  37         <depend>ixjuser</depend>
  38         <support_level>extended</support_level>
  39  ***/
  40
  41 #include "asterisk.h"
  42
  43 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  44
  45 #include <ctype.h>
  46 #include <sys/socket.h>
  47 #include <sys/time.h>
  48 #include <arpa/inet.h>
  49 #include <fcntl.h>
  50 #include <sys/ioctl.h>
  51 #include <signal.h>
  52 #ifdef HAVE_LINUX_COMPILER_H
  53 #include <linux/compiler.h>
  54 #endif
  55 #include <linux/telephony.h>
  56 /* Still use some IXJ specific stuff */
  57 #include <linux/version.h>
  58 #include <linux/ixjuser.h>
  59
  60 #include "asterisk/lock.h"
  61 #include "asterisk/channel.h"
  62 #include "asterisk/config.h"
  63 #include "asterisk/module.h"
  64 #include "asterisk/pbx.h"
  65 #include "asterisk/utils.h"
  66 #include "asterisk/callerid.h"
  67 #include "asterisk/causes.h"
  68 #include "asterisk/stringfields.h"
  69 #include "asterisk/musiconhold.h"
  70 #include "asterisk/format_cache.h"
  71 #include "asterisk/format_compatibility.h"
  72
  73 #include "chan_phone.h"
  74
  75 #ifdef QTI_PHONEJACK_TJ_PCI     /* check for the newer quicknet driver v.3.1.0 which has this symbol */
  76 #define QNDRV_VER 310
  77 #else
  78 #define QNDRV_VER 100
  79 #endif
  80
  81 #if QNDRV_VER > 100
  82 #ifdef __linux__
  83 #define IXJ_PHONE_RING_START(x) ioctl(p->fd, PHONE_RING_START, &x);
  84 #else /* FreeBSD and others */
  85 #define IXJ_PHONE_RING_START(x) ioctl(p->fd, PHONE_RING_START, x);
  86 #endif /* __linux__ */
  87 #else   /* older driver */
  88 #define IXJ_PHONE_RING_START(x) ioctl(p->fd, PHONE_RING_START, &x);
  89 #endif
  90
  91 #define DEFAULT_CALLER_ID "Unknown"
  92 #define PHONE_MAX_BUF 480
  93 #define DEFAULT_GAIN 0x100
  94
  95 static const char tdesc[] = "Standard Linux Telephony API Driver";
  96 static const char config[] = "phone.conf";
  97
  98 /* Default context for dialtone mode */
  99 static char context[AST_MAX_EXTENSION] = "default";
 100
 101 /* Default language */
 102 static char language[MAX_LANGUAGE] = "";
 103
 104 static int echocancel = AEC_OFF;
 105
 106 static int silencesupression = 0;
 107
 108 static struct ast_format_cap *prefcap;
 109
 110 /* Protect the interface list (of phone_pvt's) */
 111 AST_MUTEX_DEFINE_STATIC(iflock);
 112
 113 /* Protect the monitoring thread, so only one process can kill or start it, and not
 114    when it's doing something critical. */
 115 AST_MUTEX_DEFINE_STATIC(monlock);
 116
 117 /* Boolean value whether the monitoring thread shall continue. */
 118 static unsigned int monitor;
 119
 120 /* This is the thread for the monitor which checks for input on the channels
 121    which are not currently in use.  */
 122 static pthread_t monitor_thread = AST_PTHREADT_NULL;
 123
 124 static int restart_monitor(void);
 125
 126 /* The private structures of the Phone Jack channels are linked for
 127    selecting outgoing channels */
 128
 129 #define MODE_DIALTONE   1
 130 #define MODE_IMMEDIATE  2
 131 #define MODE_FXO        3
 132 #define MODE_FXS        4
 133 #define MODE_SIGMA      5
 134
 135 static struct phone_pvt {
 136         int fd;                                                 /* Raw file descriptor for this device */
 137         struct ast_channel *owner;              /* Channel we belong to, possibly NULL */
 138         int mode;                                               /* Is this in the  */
 139         struct ast_format *lastformat;            /* Last output format */
 140         struct ast_format *lastinput;             /* Last input format */
 141         int ministate;                                  /* Miniature state, for dialtone mode */
 142         char dev[256];                                  /* Device name */
 143         struct phone_pvt *next;                 /* Next channel in list */
 144         struct ast_frame fr;                    /* Frame */
 145         char offset[AST_FRIENDLY_OFFSET];
 146         char buf[PHONE_MAX_BUF];                                        /* Static buffer for reading frames */
 147         int obuflen;
 148         int dialtone;
 149         int txgain, rxgain;             /* gain control for playing, recording  */
 150                                                                         /* 0x100 - 1.0, 0x200 - 2.0, 0x80 - 0.5 */
 151         int cpt;                                                /* Call Progress Tone playing? */
 152         int silencesupression;
 153         char context[AST_MAX_EXTENSION];
 154         char obuf[PHONE_MAX_BUF * 2];
 155         char ext[AST_MAX_EXTENSION];
 156         char language[MAX_LANGUAGE];
 157         char cid_num[AST_MAX_EXTENSION];
 158         char cid_name[AST_MAX_EXTENSION];
 159 } *iflist = NULL;
 160
 161 static char cid_num[AST_MAX_EXTENSION];
 162 static char cid_name[AST_MAX_EXTENSION];
 163
 164 static struct ast_channel *phone_request(const char *type, struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause);
 165 static int phone_digit_begin(struct ast_channel *ast, char digit);
 166 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
 167 static int phone_call(struct ast_channel *ast, const char *dest, int timeout);
 168 static int phone_hangup(struct ast_channel *ast);
 169 static int phone_answer(struct ast_channel *ast);
 170 static struct ast_frame *phone_read(struct ast_channel *ast);
 171 static int phone_write(struct ast_channel *ast, struct ast_frame *frame);
 172 static struct ast_frame *phone_exception(struct ast_channel *ast);
 173 static int phone_send_text(struct ast_channel *ast, const char *text);
 174 static int phone_fixup(struct ast_channel *old, struct ast_channel *new);
 175 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen);
 176
 177 static struct ast_channel_tech phone_tech = {
 178         .type = "Phone",
 179         .description = tdesc,
 180         .requester = phone_request,
 181         .send_digit_begin = phone_digit_begin,
 182         .send_digit_end = phone_digit_end,
 183         .call = phone_call,
 184         .hangup = phone_hangup,
 185         .answer = phone_answer,
 186         .read = phone_read,
 187         .write = phone_write,
 188         .exception = phone_exception,
 189         .indicate = phone_indicate,
 190         .fixup = phone_fixup
 191 };
 192
 193 static struct ast_channel_tech phone_tech_fxs = {
 194         .type = "Phone",
 195         .description = tdesc,
 196         .requester = phone_request,
 197         .send_digit_begin = phone_digit_begin,
 198         .send_digit_end = phone_digit_end,
 199         .call = phone_call,
 200         .hangup = phone_hangup,
 201         .answer = phone_answer,
 202         .read = phone_read,
 203         .write = phone_write,
 204         .exception = phone_exception,
 205         .write_video = phone_write,
 206         .send_text = phone_send_text,
 207         .indicate = phone_indicate,
 208         .fixup = phone_fixup
 209 };
 210
 211 static struct ast_channel_tech *cur_tech;
 212
 213 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen)
 214 {
 215         struct phone_pvt *p = ast_channel_tech_pvt(chan);
 216         int res=-1;
 217         ast_debug(1, "Requested indication %d on channel %s\n", condition, ast_channel_name(chan));
 218         switch(condition) {
 219         case AST_CONTROL_FLASH:
 220                 ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
 221                 usleep(320000);
 222                 ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
 223                 ao2_cleanup(p->lastformat);
 224                 p->lastformat = NULL;
 225                 res = 0;
 226                 break;
 227         case AST_CONTROL_HOLD:
 228                 ast_moh_start(chan, data, NULL);
 229                 break;
 230         case AST_CONTROL_UNHOLD:
 231                 ast_moh_stop(chan);
 232                 break;
 233         case AST_CONTROL_SRCUPDATE:
 234                 res = 0;
 235                 break;
 236         case AST_CONTROL_PVT_CAUSE_CODE:
 237                 break;
 238         default:
 239                 ast_log(LOG_WARNING, "Condition %d is not supported on channel %s\n", condition, ast_channel_name(chan));
 240         }
 241         return res;
 242 }
 243
 244 static int phone_fixup(struct ast_channel *old, struct ast_channel *new)
 245 {
 246         struct phone_pvt *pvt = ast_channel_tech_pvt(old);
 247         if (pvt && pvt->owner == old)
 248                 pvt->owner = new;
 249         return 0;
 250 }
 251
 252 static int phone_digit_begin(struct ast_channel *chan, char digit)
 253 {
 254         /* XXX Modify this callback to let Asterisk support controlling the length of DTMF */
 255         return 0;
 256 }
 257
 258 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
 259 {
 260         struct phone_pvt *p;
 261         int outdigit;
 262         p = ast_channel_tech_pvt(ast);
 263         ast_debug(1, "Dialed %c\n", digit);
 264         switch(digit) {
 265         case '0':
 266         case '1':
 267         case '2':
 268         case '3':
 269         case '4':
 270         case '5':
 271         case '6':
 272         case '7':
 273         case '8':
 274         case '9':
 275                 outdigit = digit - '0';
 276                 break;
 277         case '*':
 278                 outdigit = 11;
 279                 break;
 280         case '#':
 281                 outdigit = 12;
 282                 break;
 283         case 'f':       /*flash*/
 284         case 'F':
 285                 ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
 286                 usleep(320000);
 287                 ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
 288                 ao2_cleanup(p->lastformat);
 289                 p->lastformat = NULL;
 290                 return 0;
 291         default:
 292                 ast_log(LOG_WARNING, "Unknown digit '%c'\n", digit);
 293                 return -1;
 294         }
 295         ast_debug(1, "Dialed %d\n", outdigit);
 296         ioctl(p->fd, PHONE_PLAY_TONE, outdigit);
 297         ao2_cleanup(p->lastformat);
 298         p->lastformat = NULL;
 299         return 0;
 300 }
 301
 302 static int phone_call(struct ast_channel *ast, const char *dest, int timeout)
 303 {
 304         struct phone_pvt *p;
 305
 306         PHONE_CID cid;
 307         struct timeval UtcTime = ast_tvnow();
 308         struct ast_tm tm;
 309         int start;
 310
 311         ast_localtime(&UtcTime, &tm, NULL);
 312
 313         memset(&cid, 0, sizeof(PHONE_CID));
 314     snprintf(cid.month, sizeof(cid.month), "%02d",(tm.tm_mon + 1));
 315     snprintf(cid.day, sizeof(cid.day),     "%02d", tm.tm_mday);
 316     snprintf(cid.hour, sizeof(cid.hour),   "%02d", tm.tm_hour);
 317     snprintf(cid.min, sizeof(cid.min),     "%02d", tm.tm_min);
 318         /* the standard format of ast->callerid is:  "name" <number>, but not always complete */
 319         if (!ast_channel_connected(ast)->id.name.valid
 320                 || ast_strlen_zero(ast_channel_connected(ast)->id.name.str)) {
 321                 strcpy(cid.name, DEFAULT_CALLER_ID);
 322         } else {
 323                 ast_copy_string(cid.name, ast_channel_connected(ast)->id.name.str, sizeof(cid.name));
 324         }
 325
 326         if (ast_channel_connected(ast)->id.number.valid && ast_channel_connected(ast)->id.number.str) {
 327                 ast_copy_string(cid.number, ast_channel_connected(ast)->id.number.str, sizeof(cid.number));
 328         }
 329
 330         p = ast_channel_tech_pvt(ast);
 331
 332         if ((ast_channel_state(ast) != AST_STATE_DOWN) && (ast_channel_state(ast) != AST_STATE_RESERVED)) {
 333                 ast_log(LOG_WARNING, "phone_call called on %s, neither down nor reserved\n", ast_channel_name(ast));
 334                 return -1;
 335         }
 336         ast_debug(1, "Ringing %s on %s (%d)\n", dest, ast_channel_name(ast), ast_channel_fd(ast, 0));
 337
 338         start = IXJ_PHONE_RING_START(cid);
 339         if (start == -1)
 340                 return -1;
 341
 342         if (p->mode == MODE_FXS) {
 343                 const char *digit = strchr(dest, '/');
 344                 if (digit)
 345                 {
 346                   digit++;
 347                   while (*digit)
 348                     phone_digit_end(ast, *digit++, 0);
 349                 }
 350         }
 351
 352         ast_setstate(ast, AST_STATE_RINGING);
 353         ast_queue_control(ast, AST_CONTROL_RINGING);
 354         return 0;
 355 }
 356
 357 static int phone_hangup(struct ast_channel *ast)
 358 {
 359         struct phone_pvt *p;
 360         p = ast_channel_tech_pvt(ast);
 361         ast_debug(1, "phone_hangup(%s)\n", ast_channel_name(ast));
 362         if (!ast_channel_tech_pvt(ast)) {
 363                 ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
 364                 return 0;
 365         }
 366         /* XXX Is there anything we can do to really hang up except stop recording? */
 367         ast_setstate(ast, AST_STATE_DOWN);
 368         if (ioctl(p->fd, PHONE_REC_STOP))
 369                 ast_log(LOG_WARNING, "Failed to stop recording\n");
 370         if (ioctl(p->fd, PHONE_PLAY_STOP))
 371                 ast_log(LOG_WARNING, "Failed to stop playing\n");
 372         if (ioctl(p->fd, PHONE_RING_STOP))
 373                 ast_log(LOG_WARNING, "Failed to stop ringing\n");
 374         if (ioctl(p->fd, PHONE_CPT_STOP))
 375                 ast_log(LOG_WARNING, "Failed to stop sounds\n");
 376
 377         /* If it's an FXO, hang them up */
 378         if (p->mode == MODE_FXO) {
 379                 if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
 380                         ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",ast_channel_name(ast), strerror(errno));
 381         }
 382
 383         /* If they're off hook, give a busy signal */
 384         if (ioctl(p->fd, PHONE_HOOKSTATE)) {
 385                 ast_debug(1, "Got hunghup, giving busy signal\n");
 386                 ioctl(p->fd, PHONE_BUSY);
 387                 p->cpt = 1;
 388         }
 389         ao2_cleanup(p->lastformat);
 390         p->lastformat = NULL;
 391         ao2_cleanup(p->lastinput);
 392         p->lastinput = NULL;
 393         p->ministate = 0;
 394         p->obuflen = 0;
 395         p->dialtone = 0;
 396         memset(p->ext, 0, sizeof(p->ext));
 397         ((struct phone_pvt *)(ast_channel_tech_pvt(ast)))->owner = NULL;
 398         ast_module_unref(ast_module_info->self);
 399         ast_verb(3, "Hungup '%s'\n", ast_channel_name(ast));
 400         ast_channel_tech_pvt_set(ast, NULL);
 401         ast_setstate(ast, AST_STATE_DOWN);
 402         restart_monitor();
 403         return 0;
 404 }
 405
 406 static int phone_setup(struct ast_channel *ast)
 407 {
 408         struct phone_pvt *p;
 409         p = ast_channel_tech_pvt(ast);
 410         ioctl(p->fd, PHONE_CPT_STOP);
 411         /* Nothing to answering really, just start recording */
 412         if (ast_format_cmp(ast_channel_rawreadformat(ast), ast_format_g729) == AST_FORMAT_CMP_EQUAL) {
 413                 /* Prefer g729 */
 414                 ioctl(p->fd, PHONE_REC_STOP);
 415                 if (!p->lastinput || (ast_format_cmp(p->lastinput, ast_format_g729) != AST_FORMAT_CMP_EQUAL)) {
 416                         ao2_replace(p->lastinput, ast_format_g729);
 417                         if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
 418                                 ast_log(LOG_WARNING, "Failed to set codec to g729\n");
 419                                 return -1;
 420                         }
 421                 }
 422         } else if (ast_format_cmp(ast_channel_rawreadformat(ast), ast_format_g723) == AST_FORMAT_CMP_EQUAL) {
 423                 ioctl(p->fd, PHONE_REC_STOP);
 424                 if (!p->lastinput || (ast_format_cmp(p->lastinput, ast_format_g723) != AST_FORMAT_CMP_EQUAL)) {
 425                         ao2_replace(p->lastinput, ast_format_g723);
 426                         if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
 427                                 ast_log(LOG_WARNING, "Failed to set codec to g723.1\n");
 428                                 return -1;
 429                         }
 430                 }
 431         } else if (ast_format_cmp(ast_channel_rawreadformat(ast), ast_format_slin) == AST_FORMAT_CMP_EQUAL) {
 432                 ioctl(p->fd, PHONE_REC_STOP);
 433                 if (!p->lastinput || (ast_format_cmp(p->lastinput, ast_format_slin) != AST_FORMAT_CMP_EQUAL)) {
 434                         ao2_replace(p->lastinput, ast_format_slin);
 435                         if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
 436                                 ast_log(LOG_WARNING, "Failed to set codec to signed linear 16\n");
 437                                 return -1;
 438                         }
 439                 }
 440         } else if (ast_format_cmp(ast_channel_rawreadformat(ast), ast_format_ulaw) == AST_FORMAT_CMP_EQUAL) {
 441                 ioctl(p->fd, PHONE_REC_STOP);
 442                 if (!p->lastinput || (ast_format_cmp(p->lastinput, ast_format_ulaw) != AST_FORMAT_CMP_EQUAL)) {
 443                         ao2_replace(p->lastinput, ast_format_ulaw);
 444                         if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
 445                                 ast_log(LOG_WARNING, "Failed to set codec to uLaw\n");
 446                                 return -1;
 447                         }
 448                 }
 449         } else if (p->mode == MODE_FXS) {
 450                 ioctl(p->fd, PHONE_REC_STOP);
 451                 if (!p->lastinput || (ast_format_cmp(p->lastinput, ast_channel_rawreadformat(ast)) == AST_FORMAT_CMP_NOT_EQUAL)) {
 452                         ao2_replace(p->lastinput, ast_channel_rawreadformat(ast));
 453                         if (ioctl(p->fd, PHONE_REC_CODEC, ast_channel_rawreadformat(ast))) {
 454                                 ast_log(LOG_WARNING, "Failed to set codec to %s\n",
 455                                         ast_format_get_name(ast_channel_rawreadformat(ast)));
 456                                 return -1;
 457                         }
 458                 }
 459         } else {
 460                 ast_log(LOG_WARNING, "Can't do format %s\n", ast_format_get_name(ast_channel_rawreadformat(ast)));
 461                 return -1;
 462         }
 463         if (ioctl(p->fd, PHONE_REC_START)) {
 464                 ast_log(LOG_WARNING, "Failed to start recording\n");
 465                 return -1;
 466         }
 467         /* set the DTMF times (the default is too short) */
 468         ioctl(p->fd, PHONE_SET_TONE_ON_TIME, 300);
 469         ioctl(p->fd, PHONE_SET_TONE_OFF_TIME, 200);
 470         return 0;
 471 }
 472
 473 static int phone_answer(struct ast_channel *ast)
 474 {
 475         struct phone_pvt *p;
 476         p = ast_channel_tech_pvt(ast);
 477         /* In case it's a LineJack, take it off hook */
 478         if (p->mode == MODE_FXO) {
 479                 if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_OFF_HOOK))
 480                         ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n", ast_channel_name(ast), strerror(errno));
 481                 else
 482                         ast_debug(1, "Took linejack off hook\n");
 483         }
 484         phone_setup(ast);
 485         ast_debug(1, "phone_answer(%s)\n", ast_channel_name(ast));
 486         ast_channel_rings_set(ast, 0);
 487         ast_setstate(ast, AST_STATE_UP);
 488         return 0;
 489 }
 490
 491 #if 0
 492 static char phone_2digit(char c)
 493 {
 494         if (c == 12)
 495                 return '#';
 496         else if (c == 11)
 497                 return '*';
 498         else if ((c < 10) && (c >= 0))
 499                 return '0' + c - 1;
 500         else
 501                 return '?';
 502 }
 503 #endif
 504
 505 static struct ast_frame  *phone_exception(struct ast_channel *ast)
 506 {
 507         int res;
 508         union telephony_exception phonee;
 509         struct phone_pvt *p = ast_channel_tech_pvt(ast);
 510         char digit;
 511
 512         /* Some nice norms */
 513         p->fr.datalen = 0;
 514         p->fr.samples = 0;
 515         p->fr.data.ptr =  NULL;
 516         p->fr.src = "Phone";
 517         p->fr.offset = 0;
 518         p->fr.mallocd=0;
 519         p->fr.delivery = ast_tv(0,0);
 520
 521         phonee.bytes = ioctl(p->fd, PHONE_EXCEPTION);
 522         if (phonee.bits.dtmf_ready)  {
 523                 ast_debug(1, "phone_exception(): DTMF\n");
 524
 525                 /* We've got a digit -- Just handle this nicely and easily */
 526                 digit =  ioctl(p->fd, PHONE_GET_DTMF_ASCII);
 527                 p->fr.subclass.integer = digit;
 528                 p->fr.frametype = AST_FRAME_DTMF;
 529                 return &p->fr;
 530         }
 531         if (phonee.bits.hookstate) {
 532                 ast_debug(1, "Hookstate changed\n");
 533                 res = ioctl(p->fd, PHONE_HOOKSTATE);
 534                 /* See if we've gone on hook, if so, notify by returning NULL */
 535                 ast_debug(1, "New hookstate: %d\n", res);
 536                 if (!res && (p->mode != MODE_FXO))
 537                         return NULL;
 538                 else {
 539                         if (ast_channel_state(ast) == AST_STATE_RINGING) {
 540                                 /* They've picked up the phone */
 541                                 p->fr.frametype = AST_FRAME_CONTROL;
 542                                 p->fr.subclass.integer = AST_CONTROL_ANSWER;
 543                                 phone_setup(ast);
 544                                 ast_setstate(ast, AST_STATE_UP);
 545                                 return &p->fr;
 546                         }  else
 547                                 ast_log(LOG_WARNING, "Got off hook in weird state %u\n", ast_channel_state(ast));
 548                 }
 549         }
 550 #if 1
 551         if (phonee.bits.pstn_ring)
 552                 ast_verbose("Unit is ringing\n");
 553         if (phonee.bits.caller_id) {
 554                 ast_verbose("We have caller ID\n");
 555         }
 556         if (phonee.bits.pstn_wink)
 557                 ast_verbose("Detected Wink\n");
 558 #endif
 559         /* Strange -- nothing there.. */
 560         p->fr.frametype = AST_FRAME_NULL;
 561         p->fr.subclass.integer = 0;
 562         return &p->fr;
 563 }
 564
 565 static struct ast_frame  *phone_read(struct ast_channel *ast)
 566 {
 567         int res;
 568         struct phone_pvt *p = ast_channel_tech_pvt(ast);
 569
 570
 571         /* Some nice norms */
 572         p->fr.datalen = 0;
 573         p->fr.samples = 0;
 574         p->fr.data.ptr =  NULL;
 575         p->fr.src = "Phone";
 576         p->fr.offset = 0;
 577         p->fr.mallocd=0;
 578         p->fr.delivery = ast_tv(0,0);
 579
 580         /* Try to read some data... */
 581         CHECK_BLOCKING(ast);
 582         res = read(p->fd, p->buf, PHONE_MAX_BUF);
 583         ast_clear_flag(ast_channel_flags(ast), AST_FLAG_BLOCKING);
 584         if (res < 0) {
 585 #if 0
 586                 if (errno == EAGAIN) {
 587                         ast_log(LOG_WARNING, "Null frame received\n");
 588                         p->fr.frametype = AST_FRAME_NULL;
 589                         p->fr.subclass = 0;
 590                         return &p->fr;
 591                 }
 592 #endif
 593                 ast_log(LOG_WARNING, "Error reading: %s\n", strerror(errno));
 594                 return NULL;
 595         }
 596         p->fr.data.ptr = p->buf;
 597         if (p->mode != MODE_FXS)
 598         switch(p->buf[0] & 0x3) {
 599         case '0':
 600         case '1':
 601                 /* Normal */
 602                 break;
 603         case '2':
 604         case '3':
 605                 /* VAD/CNG, only send two words */
 606                 res = 4;
 607                 break;
 608         }
 609         p->fr.samples = 240;
 610         p->fr.datalen = res;
 611         p->fr.frametype = ast_format_get_type(p->lastinput) == AST_MEDIA_TYPE_AUDIO ?
 612                 AST_FRAME_VOICE : ast_format_get_type(p->lastinput) == AST_MEDIA_TYPE_IMAGE ?
 613                 AST_FRAME_IMAGE : AST_FRAME_VIDEO;
 614         p->fr.subclass.format = p->lastinput;
 615         p->fr.offset = AST_FRIENDLY_OFFSET;
 616         /* Byteswap from little-endian to native-endian */
 617         if (ast_format_cmp(p->fr.subclass.format, ast_format_slin) == AST_FORMAT_CMP_EQUAL)
 618                 ast_frame_byteswap_le(&p->fr);
 619         return &p->fr;
 620 }
 621
 622 static int phone_write_buf(struct phone_pvt *p, const char *buf, int len, int frlen, int swap)
 623 {
 624         int res;
 625         /* Store as much of the buffer as we can, then write fixed frames */
 626         int space = sizeof(p->obuf) - p->obuflen;
 627         /* Make sure we have enough buffer space to store the frame */
 628         if (space < len)
 629                 len = space;
 630         if (swap)
 631                 ast_swapcopy_samples(p->obuf+p->obuflen, buf, len/2);
 632         else
 633                 memcpy(p->obuf + p->obuflen, buf, len);
 634         p->obuflen += len;
 635         while(p->obuflen > frlen) {
 636                 res = write(p->fd, p->obuf, frlen);
 637                 if (res != frlen) {
 638                         if (res < 1) {
 639 /*
 640  * Card is in non-blocking mode now and it works well now, but there are
 641  * lot of messages like this. So, this message is temporarily disabled.
 642  */
 643                                 return 0;
 644                         } else {
 645                                 ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frlen);
 646                         }
 647                 }
 648                 p->obuflen -= frlen;
 649                 /* Move memory if necessary */
 650                 if (p->obuflen)
 651                         memmove(p->obuf, p->obuf + frlen, p->obuflen);
 652         }
 653         return len;
 654 }
 655
 656 static int phone_send_text(struct ast_channel *ast, const char *text)
 657 {
 658     int length = strlen(text);
 659     return phone_write_buf(ast_channel_tech_pvt(ast), text, length, length, 0) ==
 660            length ? 0 : -1;
 661 }
 662
 663 static int phone_write(struct ast_channel *ast, struct ast_frame *frame)
 664 {
 665         struct phone_pvt *p = ast_channel_tech_pvt(ast);
 666         int res;
 667         int maxfr=0;
 668         char *pos;
 669         int sofar;
 670         int expected;
 671         int codecset = 0;
 672         char tmpbuf[4];
 673         /* Write a frame of (presumably voice) data */
 674         if (frame->frametype != AST_FRAME_VOICE && p->mode != MODE_FXS) {
 675                 if (frame->frametype != AST_FRAME_IMAGE)
 676                         ast_log(LOG_WARNING, "Don't know what to do with  frame type '%u'\n", frame->frametype);
 677                 return 0;
 678         }
 679 #if 0
 680         /* If we're not in up mode, go into up mode now */
 681         if (ast->_state != AST_STATE_UP) {
 682                 ast_setstate(ast, AST_STATE_UP);
 683                 phone_setup(ast);
 684         }
 685 #else
 686         if (ast_channel_state(ast) != AST_STATE_UP) {
 687                 /* Don't try tos end audio on-hook */
 688                 return 0;
 689         }
 690 #endif
 691         if (ast_format_cmp(frame->subclass.format, ast_format_g729) == AST_FORMAT_CMP_EQUAL) {
 692                 if (!p->lastformat || (ast_format_cmp(p->lastformat, ast_format_g729) != AST_FORMAT_CMP_EQUAL)) {
 693                         ioctl(p->fd, PHONE_PLAY_STOP);
 694                         ioctl(p->fd, PHONE_REC_STOP);
 695                         if (ioctl(p->fd, PHONE_PLAY_CODEC, G729)) {
 696                                 ast_log(LOG_WARNING, "Unable to set G729 mode\n");
 697                                 return -1;
 698                         }
 699                         if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
 700                                 ast_log(LOG_WARNING, "Unable to set G729 mode\n");
 701                                 return -1;
 702                         }
 703                         ao2_replace(p->lastformat, ast_format_g729);
 704                         ao2_replace(p->lastinput, ast_format_g729);
 705                         /* Reset output buffer */
 706                         p->obuflen = 0;
 707                         codecset = 1;
 708                 }
 709                 if (frame->datalen > 80) {
 710                         ast_log(LOG_WARNING, "Frame size too large for G.729 (%d bytes)\n", frame->datalen);
 711                         return -1;
 712                 }
 713                 maxfr = 80;
 714     } else if (ast_format_cmp(frame->subclass.format, ast_format_g723) == AST_FORMAT_CMP_EQUAL) {
 715                 if (!p->lastformat || (ast_format_cmp(p->lastformat, ast_format_g723) != AST_FORMAT_CMP_EQUAL)) {
 716                         ioctl(p->fd, PHONE_PLAY_STOP);
 717                         ioctl(p->fd, PHONE_REC_STOP);
 718                         if (ioctl(p->fd, PHONE_PLAY_CODEC, G723_63)) {
 719                                 ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
 720                                 return -1;
 721                         }
 722                         if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
 723                                 ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
 724                                 return -1;
 725                         }
 726                         ao2_replace(p->lastformat, ast_format_g723);
 727                         ao2_replace(p->lastinput, ast_format_g723);
 728                         /* Reset output buffer */
 729                         p->obuflen = 0;
 730                         codecset = 1;
 731                 }
 732                 if (frame->datalen > 24) {
 733                         ast_log(LOG_WARNING, "Frame size too large for G.723.1 (%d bytes)\n", frame->datalen);
 734                         return -1;
 735                 }
 736                 maxfr = 24;
 737         } else if (ast_format_cmp(frame->subclass.format, ast_format_slin) == AST_FORMAT_CMP_EQUAL) {
 738                 if (!p->lastformat || (ast_format_cmp(p->lastformat, ast_format_slin) != AST_FORMAT_CMP_EQUAL)) {
 739                         ioctl(p->fd, PHONE_PLAY_STOP);
 740                         ioctl(p->fd, PHONE_REC_STOP);
 741                         if (ioctl(p->fd, PHONE_PLAY_CODEC, LINEAR16)) {
 742                                 ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
 743                                 return -1;
 744                         }
 745                         if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
 746                                 ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
 747                                 return -1;
 748                         }
 749                         ao2_replace(p->lastformat, ast_format_slin);
 750                         ao2_replace(p->lastinput, ast_format_slin);
 751                         codecset = 1;
 752                         /* Reset output buffer */
 753                         p->obuflen = 0;
 754                 }
 755                 maxfr = 480;
 756         } else if (ast_format_cmp(frame->subclass.format, ast_format_ulaw) == AST_FORMAT_CMP_EQUAL) {
 757                 if (!p->lastformat || (ast_format_cmp(p->lastformat, ast_format_ulaw) != AST_FORMAT_CMP_EQUAL)) {
 758                         ioctl(p->fd, PHONE_PLAY_STOP);
 759                         ioctl(p->fd, PHONE_REC_STOP);
 760                         if (ioctl(p->fd, PHONE_PLAY_CODEC, ULAW)) {
 761                                 ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
 762                                 return -1;
 763                         }
 764                         if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
 765                                 ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
 766                                 return -1;
 767                         }
 768                         ao2_replace(p->lastformat, ast_format_ulaw);
 769                         ao2_replace(p->lastinput, ast_format_ulaw);
 770                         codecset = 1;
 771                         /* Reset output buffer */
 772                         p->obuflen = 0;
 773                 }
 774                 maxfr = 240;
 775         } else {
 776                 if (!p->lastformat || (ast_format_cmp(p->lastformat, frame->subclass.format) != AST_FORMAT_CMP_EQUAL)) {
 777                         ioctl(p->fd, PHONE_PLAY_STOP);
 778                         ioctl(p->fd, PHONE_REC_STOP);
 779                         if (ioctl(p->fd, PHONE_PLAY_CODEC, ast_format_compatibility_format2bitfield(frame->subclass.format))) {
 780                                 ast_log(LOG_WARNING, "Unable to set %s mode\n",
 781                                         ast_format_get_name(frame->subclass.format));
 782                                 return -1;
 783                         }
 784                         if (ioctl(p->fd, PHONE_REC_CODEC, ast_format_compatibility_format2bitfield(frame->subclass.format))) {
 785                                 ast_log(LOG_WARNING, "Unable to set %s mode\n",
 786                                         ast_format_get_name(frame->subclass.format));
 787                                 return -1;
 788                         }
 789                         ao2_replace(p->lastformat, frame->subclass.format);
 790                         ao2_replace(p->lastinput, frame->subclass.format);
 791                         codecset = 1;
 792                         /* Reset output buffer */
 793                         p->obuflen = 0;
 794                 }
 795                 maxfr = 480;
 796         }
 797         if (codecset) {
 798                 ioctl(p->fd, PHONE_REC_DEPTH, 3);
 799                 ioctl(p->fd, PHONE_PLAY_DEPTH, 3);
 800                 if (ioctl(p->fd, PHONE_PLAY_START)) {
 801                         ast_log(LOG_WARNING, "Failed to start playback\n");
 802                         return -1;
 803                 }
 804                 if (ioctl(p->fd, PHONE_REC_START)) {
 805                         ast_log(LOG_WARNING, "Failed to start recording\n");
 806                         return -1;
 807                 }
 808         }
 809         /* If we get here, we have a frame of Appropriate data */
 810         sofar = 0;
 811         pos = frame->data.ptr;
 812         while(sofar < frame->datalen) {
 813                 /* Write in no more than maxfr sized frames */
 814                 expected = frame->datalen - sofar;
 815                 if (maxfr < expected)
 816                         expected = maxfr;
 817                 /* XXX Internet Phone Jack does not handle the 4-byte VAD frame properly! XXX
 818                    we have to pad it to 24 bytes still.  */
 819                 if (frame->datalen == 4) {
 820                         if (p->silencesupression) {
 821                                 memcpy(tmpbuf, frame->data.ptr, 4);
 822                                 expected = 24;
 823                                 res = phone_write_buf(p, tmpbuf, expected, maxfr, 0);
 824                         }
 825                         res = 4;
 826                         expected=4;
 827                 } else {
 828                         int swap = 0;
 829 #if __BYTE_ORDER == __BIG_ENDIAN
 830                         if (ast_format_cmp(frame->subclass.format, ast_format_slin) == AST_FORMAT_CMP_EQUAL)
 831                                 swap = 1; /* Swap big-endian samples to little-endian as we copy */
 832 #endif
 833                         res = phone_write_buf(p, pos, expected, maxfr, swap);
 834                 }
 835                 if (res != expected) {
 836                         if ((errno != EAGAIN) && (errno != EINTR)) {
 837                                 if (res < 0)
 838                                         ast_log(LOG_WARNING, "Write returned error (%s)\n", strerror(errno));
 839         /*
 840          * Card is in non-blocking mode now and it works well now, but there are
 841          * lot of messages like this. So, this message is temporarily disabled.
 842          */
 843 #if 0
 844                                 else
 845                                         ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frame->datalen);
 846 #endif
 847                                 return -1;
 848                         } else /* Pretend it worked */
 849                                 res = expected;
 850                 }
 851                 sofar += res;
 852                 pos += res;
 853         }
 854         return 0;
 855 }
 856
 857 static struct ast_channel *phone_new(struct phone_pvt *i, int state, char *cntx, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor)
 858 {
 859         struct ast_format_cap *caps = NULL;
 860         struct ast_channel *tmp;
 861         struct phone_codec_data queried_codec;
 862         struct ast_format *tmpfmt;
 863         caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
 864         tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "", i->ext, i->context, assignedids, requestor, 0, "Phone/%s", i->dev + 5);
 865         if (tmp && caps) {
 866                 ast_channel_lock(tmp);
 867                 ast_channel_tech_set(tmp, cur_tech);
 868                 ast_channel_set_fd(tmp, 0, i->fd);
 869                 /* XXX Switching formats silently causes kernel panics XXX */
 870                 if (i->mode == MODE_FXS &&
 871                     ioctl(i->fd, PHONE_QUERY_CODEC, &queried_codec) == 0) {
 872                         if (queried_codec.type == LINEAR16) {
 873                                 ast_format_cap_append(caps, ast_format_slin, 0);
 874                         } else {
 875                                 ast_format_cap_remove(prefcap, ast_format_slin);
 876                                 ast_format_cap_append_from_cap(caps, prefcap, AST_MEDIA_TYPE_UNKNOWN);
 877                         }
 878                 } else {
 879                         ast_format_cap_append_from_cap(caps, prefcap, AST_MEDIA_TYPE_UNKNOWN);
 880                 }
 881                 tmpfmt = ast_format_cap_get_format(caps, 0);
 882                 ast_channel_nativeformats_set(tmp, caps);
 883                 ao2_ref(caps, -1);
 884                 ast_channel_set_rawreadformat(tmp, tmpfmt);
 885                 ast_channel_set_rawwriteformat(tmp, tmpfmt);
 886                 ao2_ref(tmpfmt, -1);
 887                 /* no need to call ast_setstate: the channel_alloc already did its job */
 888                 if (state == AST_STATE_RING)
 889                         ast_channel_rings_set(tmp, 1);
 890                 ast_channel_tech_pvt_set(tmp, i);
 891                 ast_channel_context_set(tmp, cntx);
 892                 if (!ast_strlen_zero(i->ext))
 893                         ast_channel_exten_set(tmp, i->ext);
 894                 else
 895                         ast_channel_exten_set(tmp, "s");
 896                 if (!ast_strlen_zero(i->language))
 897                         ast_channel_language_set(tmp, i->language);
 898
 899                 /* Don't use ast_set_callerid() here because it will
 900                  * generate a NewCallerID event before the NewChannel event */
 901                 if (!ast_strlen_zero(i->cid_num)) {
 902                         ast_channel_caller(tmp)->ani.number.valid = 1;
 903                         ast_channel_caller(tmp)->ani.number.str = ast_strdup(i->cid_num);
 904                 }
 905
 906                 i->owner = tmp;
 907                 ast_module_ref(ast_module_info->self);
 908                 ast_channel_unlock(tmp);
 909                 if (state != AST_STATE_DOWN) {
 910                         if (state == AST_STATE_RING) {
 911                                 ioctl(ast_channel_fd(tmp, 0), PHONE_RINGBACK);
 912                                 i->cpt = 1;
 913                         }
 914                         if (ast_pbx_start(tmp)) {
 915                                 ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ast_channel_name(tmp));
 916                                 ast_hangup(tmp);
 917                         }
 918                 }
 919         } else {
 920                 ao2_cleanup(caps);
 921                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
 922         }
 923         return tmp;
 924 }
 925
 926 static void phone_mini_packet(struct phone_pvt *i)
 927 {
 928         int res;
 929         char buf[1024];
 930         /* Ignore stuff we read... */
 931         res = read(i->fd, buf, sizeof(buf));
 932         if (res < 1) {
 933                 ast_log(LOG_WARNING, "Read returned %d: %s\n", res, strerror(errno));
 934                 return;
 935         }
 936 }
 937
 938 static void phone_check_exception(struct phone_pvt *i)
 939 {
 940         int offhook=0;
 941         char digit[2] = {0 , 0};
 942         union telephony_exception phonee;
 943         /* XXX Do something XXX */
 944 #if 0
 945         ast_debug(1, "Exception!\n");
 946 #endif
 947         phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION);
 948         if (phonee.bits.dtmf_ready)  {
 949                 digit[0] = ioctl(i->fd, PHONE_GET_DTMF_ASCII);
 950                 if (i->mode == MODE_DIALTONE || i->mode == MODE_FXS || i->mode == MODE_SIGMA) {
 951                         ioctl(i->fd, PHONE_PLAY_STOP);
 952                         ioctl(i->fd, PHONE_REC_STOP);
 953                         ioctl(i->fd, PHONE_CPT_STOP);
 954                         i->dialtone = 0;
 955                         if (strlen(i->ext) < AST_MAX_EXTENSION - 1)
 956                                 strncat(i->ext, digit, sizeof(i->ext) - strlen(i->ext) - 1);
 957                         if ((i->mode != MODE_FXS ||
 958                              !(phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION)) ||
 959                              !phonee.bits.dtmf_ready) &&
 960                             ast_exists_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
 961                                 /* It's a valid extension in its context, get moving! */
 962                                 phone_new(i, AST_STATE_RING, i->context, NULL, NULL);
 963                                 /* No need to restart monitor, we are the monitor */
 964                         } else if (!ast_canmatch_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
 965                                 /* There is nothing in the specified extension that can match anymore.
 966                                    Try the default */
 967                                 if (ast_exists_extension(NULL, "default", i->ext, 1, i->cid_num)) {
 968                                         /* Check the default, too... */
 969                                         phone_new(i, AST_STATE_RING, "default", NULL, NULL);
 970                                         /* XXX This should probably be justified better XXX */
 971                                 }  else if (!ast_canmatch_extension(NULL, "default", i->ext, 1, i->cid_num)) {
 972                                         /* It's not a valid extension, give a busy signal */
 973                                         ast_debug(1, "%s can't match anything in %s or default\n", i->ext, i->context);
 974                                         ioctl(i->fd, PHONE_BUSY);
 975                                         i->cpt = 1;
 976                                 }
 977                         }
 978 #if 0
 979                         ast_verbose("Extension is %s\n", i->ext);
 980 #endif
 981                 }
 982         }
 983         if (phonee.bits.hookstate) {
 984                 offhook = ioctl(i->fd, PHONE_HOOKSTATE);
 985                 if (offhook) {
 986                         if (i->mode == MODE_IMMEDIATE) {
 987                                 phone_new(i, AST_STATE_RING, i->context, NULL, NULL);
 988                         } else if (i->mode == MODE_DIALTONE) {
 989                                 ast_module_ref(ast_module_info->self);
 990                                 /* Reset the extension */
 991                                 i->ext[0] = '\0';
 992                                 /* Play the dialtone */
 993                                 i->dialtone++;
 994                                 ioctl(i->fd, PHONE_PLAY_STOP);
 995                                 ioctl(i->fd, PHONE_PLAY_CODEC, ULAW);
 996                                 ioctl(i->fd, PHONE_PLAY_START);
 997                                 ao2_cleanup(i->lastformat);
 998                                 i->lastformat = NULL;
 999                         } else if (i->mode == MODE_SIGMA) {
1000                                 ast_module_ref(ast_module_info->self);
1001                                 /* Reset the extension */
1002                                 i->ext[0] = '\0';
1003                                 /* Play the dialtone */
1004                                 i->dialtone++;
1005                                 ioctl(i->fd, PHONE_DIALTONE);
1006                         }
1007                 } else {
1008                         if (i->dialtone)
1009                                 ast_module_unref(ast_module_info->self);
1010                         memset(i->ext, 0, sizeof(i->ext));
1011                         if (i->cpt)
1012                         {
1013                                 ioctl(i->fd, PHONE_CPT_STOP);
1014                                 i->cpt = 0;
1015                         }
1016                         ioctl(i->fd, PHONE_PLAY_STOP);
1017                         ioctl(i->fd, PHONE_REC_STOP);
1018                         i->dialtone = 0;
1019                         ao2_cleanup(i->lastformat);
1020                         i->lastformat = NULL;
1021                 }
1022         }
1023         if (phonee.bits.pstn_ring) {
1024                 ast_verbose("Unit is ringing\n");
1025                 phone_new(i, AST_STATE_RING, i->context, NULL, NULL);
1026         }
1027         if (phonee.bits.caller_id)
1028                 ast_verbose("We have caller ID\n");
1029
1030
1031 }
1032
1033 static void *do_monitor(void *data)
1034 {
1035         struct pollfd *fds = NULL;
1036         int nfds = 0, inuse_fds = 0, res;
1037         struct phone_pvt *i;
1038         int tonepos = 0;
1039         /* The tone we're playing this round */
1040         struct timeval to = { 0, 0 };
1041         int dotone;
1042         /* This thread monitors all the frame relay interfaces which are not yet in use
1043            (and thus do not have a separate thread) indefinitely */
1044         while (monitor) {
1045                 /* Don't let anybody kill us right away.  Nobody should lock the interface list
1046                    and wait for the monitor list, but the other way around is okay. */
1047                 /* Lock the interface list */
1048                 if (ast_mutex_lock(&iflock)) {
1049                         ast_log(LOG_ERROR, "Unable to grab interface lock\n");
1050                         return NULL;
1051                 }
1052                 /* Build the stuff we're going to select on, that is the socket of every
1053                    phone_pvt that does not have an associated owner channel */
1054                 i = iflist;
1055                 dotone = 0;
1056                 inuse_fds = 0;
1057                 for (i = iflist; i; i = i->next) {
1058                         if (!i->owner) {
1059                                 /* This needs to be watched, as it lacks an owner */
1060                                 if (inuse_fds == nfds) {
1061                                         void *tmp = ast_realloc(fds, (nfds + 1) * sizeof(*fds));
1062                                         if (!tmp) {
1063                                                 /* Avoid leaking */
1064                                                 continue;
1065                                         }
1066                                         fds = tmp;
1067                                         nfds++;
1068                                 }
1069                                 fds[inuse_fds].fd = i->fd;
1070                                 fds[inuse_fds].events = POLLIN | POLLERR;
1071                                 fds[inuse_fds].revents = 0;
1072                                 inuse_fds++;
1073
1074                                 if (i->dialtone && i->mode != MODE_SIGMA) {
1075                                         /* Remember we're going to have to come back and play
1076                                            more dialtones */
1077                                         if (ast_tvzero(to)) {
1078                                                 /* If we're due for a dialtone, play one */
1079                                                 if (write(i->fd, DialTone + tonepos, 240) != 240) {
1080                                                         ast_log(LOG_WARNING, "Dial tone write error\n");
1081                                                 }
1082                                         }
1083                                         dotone++;
1084                                 }
1085                         }
1086                 }
1087                 /* Okay, now that we know what to do, release the interface lock */
1088                 ast_mutex_unlock(&iflock);
1089
1090                 /* Wait indefinitely for something to happen */
1091                 if (dotone && i && i->mode != MODE_SIGMA) {
1092                         /* If we're ready to recycle the time, set it to 30 ms */
1093                         tonepos += 240;
1094                         if (tonepos >= sizeof(DialTone)) {
1095                                 tonepos = 0;
1096                         }
1097                         if (ast_tvzero(to)) {
1098                                 to = ast_tv(0, 30000);
1099                         }
1100                         res = ast_poll2(fds, inuse_fds, &to);
1101                 } else {
1102                         res = ast_poll(fds, inuse_fds, -1);
1103                         to = ast_tv(0, 0);
1104                         tonepos = 0;
1105                 }
1106                 /* Okay, select has finished.  Let's see what happened.  */
1107                 if (res < 0) {
1108                         ast_debug(1, "poll returned %d: %s\n", res, strerror(errno));
1109                         continue;
1110                 }
1111                 /* If there are no fd's changed, just continue, it's probably time
1112                    to play some more dialtones */
1113                 if (!res) {
1114                         continue;
1115                 }
1116                 /* Alright, lock the interface list again, and let's look and see what has
1117                    happened */
1118                 if (ast_mutex_lock(&iflock)) {
1119                         ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1120                         continue;
1121                 }
1122
1123                 for (i = iflist; i; i = i->next) {
1124                         int j;
1125                         /* Find the record */
1126                         for (j = 0; j < inuse_fds; j++) {
1127                                 if (fds[j].fd == i->fd) {
1128                                         break;
1129                                 }
1130                         }
1131
1132                         /* Not found? */
1133                         if (j == inuse_fds) {
1134                                 continue;
1135                         }
1136
1137                         if (fds[j].revents & POLLIN) {
1138                                 if (i->owner) {
1139                                         continue;
1140                                 }
1141                                 phone_mini_packet(i);
1142                         }
1143                         if (fds[j].revents & POLLERR) {
1144                                 if (i->owner) {
1145                                         continue;
1146                                 }
1147                                 phone_check_exception(i);
1148                         }
1149                 }
1150                 ast_mutex_unlock(&iflock);
1151         }
1152         return NULL;
1153 }
1154
1155 static int restart_monitor()
1156 {
1157         /* If we're supposed to be stopped -- stay stopped */
1158         if (monitor_thread == AST_PTHREADT_STOP)
1159                 return 0;
1160         if (ast_mutex_lock(&monlock)) {
1161                 ast_log(LOG_WARNING, "Unable to lock monitor\n");
1162                 return -1;
1163         }
1164         if (monitor_thread == pthread_self()) {
1165                 ast_mutex_unlock(&monlock);
1166                 ast_log(LOG_WARNING, "Cannot kill myself\n");
1167                 return -1;
1168         }
1169         if (monitor_thread != AST_PTHREADT_NULL) {
1170                 if (ast_mutex_lock(&iflock)) {
1171                         ast_mutex_unlock(&monlock);
1172                         ast_log(LOG_WARNING, "Unable to lock the interface list\n");
1173                         return -1;
1174                 }
1175                 monitor = 0;
1176                 while (pthread_kill(monitor_thread, SIGURG) == 0)
1177                         sched_yield();
1178                 pthread_join(monitor_thread, NULL);
1179                 ast_mutex_unlock(&iflock);
1180         }
1181         monitor = 1;
1182         /* Start a new monitor */
1183         if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
1184                 ast_mutex_unlock(&monlock);
1185                 ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
1186                 return -1;
1187         }
1188         ast_mutex_unlock(&monlock);
1189         return 0;
1190 }
1191
1192 static struct phone_pvt *mkif(const char *iface, int mode, int txgain, int rxgain)
1193 {
1194         /* Make a phone_pvt structure for this interface */
1195         struct phone_pvt *tmp;
1196         int flags;
1197
1198         tmp = ast_calloc(1, sizeof(*tmp));
1199         if (tmp) {
1200                 tmp->fd = open(iface, O_RDWR);
1201                 if (tmp->fd < 0) {
1202                         ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);
1203                         ast_free(tmp);
1204                         return NULL;
1205                 }
1206                 if (mode == MODE_FXO) {
1207                         if (ioctl(tmp->fd, IXJCTL_PORT, PORT_PSTN)) {
1208                                 ast_debug(1, "Unable to set port to PSTN\n");
1209                         }
1210                 } else {
1211                         if (ioctl(tmp->fd, IXJCTL_PORT, PORT_POTS))
1212                                  if (mode != MODE_FXS)
1213                                       ast_debug(1, "Unable to set port to POTS\n");
1214                 }
1215                 ioctl(tmp->fd, PHONE_PLAY_STOP);
1216                 ioctl(tmp->fd, PHONE_REC_STOP);
1217                 ioctl(tmp->fd, PHONE_RING_STOP);
1218                 ioctl(tmp->fd, PHONE_CPT_STOP);
1219                 if (ioctl(tmp->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
1220                         ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",iface, strerror(errno));
1221                 if (echocancel != AEC_OFF)
1222                         ioctl(tmp->fd, IXJCTL_AEC_START, echocancel);
1223                 if (silencesupression)
1224                         tmp->silencesupression = 1;
1225 #ifdef PHONE_VAD
1226                 ioctl(tmp->fd, PHONE_VAD, tmp->silencesupression);
1227 #endif
1228                 tmp->mode = mode;
1229                 flags = fcntl(tmp->fd, F_GETFL);
1230                 fcntl(tmp->fd, F_SETFL, flags | O_NONBLOCK);
1231                 tmp->owner = NULL;
1232                 ao2_cleanup(tmp->lastformat);
1233                 tmp->lastformat = NULL;
1234                 ao2_cleanup(tmp->lastinput);
1235                 tmp->lastinput = NULL;
1236                 tmp->ministate = 0;
1237                 memset(tmp->ext, 0, sizeof(tmp->ext));
1238                 ast_copy_string(tmp->language, language, sizeof(tmp->language));
1239                 ast_copy_string(tmp->dev, iface, sizeof(tmp->dev));
1240                 ast_copy_string(tmp->context, context, sizeof(tmp->context));
1241                 tmp->next = NULL;
1242                 tmp->obuflen = 0;
1243                 tmp->dialtone = 0;
1244                 tmp->cpt = 0;
1245                 ast_copy_string(tmp->cid_num, cid_num, sizeof(tmp->cid_num));
1246                 ast_copy_string(tmp->cid_name, cid_name, sizeof(tmp->cid_name));
1247                 tmp->txgain = txgain;
1248                 ioctl(tmp->fd, PHONE_PLAY_VOLUME, tmp->txgain);
1249                 tmp->rxgain = rxgain;
1250                 ioctl(tmp->fd, PHONE_REC_VOLUME, tmp->rxgain);
1251         }
1252         return tmp;
1253 }
1254
1255 static struct ast_channel *phone_request(const char *type, struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause)
1256 {
1257         struct phone_pvt *p;
1258         struct ast_channel *tmp = NULL;
1259         const char *name = data;
1260
1261         /* Search for an unowned channel */
1262         if (ast_mutex_lock(&iflock)) {
1263                 ast_log(LOG_ERROR, "Unable to lock interface list???\n");
1264                 return NULL;
1265         }
1266         p = iflist;
1267         while(p) {
1268                 if (p->mode == MODE_FXS || (ast_format_cap_iscompatible(cap, phone_tech.capabilities))) {
1269                         size_t length = strlen(p->dev + 5);
1270                 if (strncmp(name, p->dev + 5, length) == 0 &&
1271                     !isalnum(name[length])) {
1272                     if (!p->owner) {
1273                      tmp = phone_new(p, AST_STATE_DOWN, p->context, assignedids, requestor);
1274                      break;
1275                 } else
1276                      *cause = AST_CAUSE_BUSY;
1277             }
1278                 }
1279                 p = p->next;
1280         }
1281         ast_mutex_unlock(&iflock);
1282         restart_monitor();
1283         if (tmp == NULL) {
1284                 if (!(ast_format_cap_iscompatible(cap, phone_tech.capabilities))) {
1285                         struct ast_str *codec_buf = ast_str_alloca(64);
1286                         ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%s'\n",
1287                                 ast_format_cap_get_names(cap, &codec_buf));
1288                         return NULL;
1289                 }
1290         }
1291         return tmp;
1292 }
1293
1294 /* parse gain value from config file */
1295 static int parse_gain_value(const char *gain_type, const char *value)
1296 {
1297         float gain;
1298
1299         /* try to scan number */
1300         if (sscanf(value, "%30f", &gain) != 1)
1301         {
1302                 ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n",
1303                         value, gain_type, config);
1304                 return DEFAULT_GAIN;
1305         }
1306
1307         /* multiplicate gain by 1.0 gain value */
1308         gain = gain * (float)DEFAULT_GAIN;
1309
1310         /* percentage? */
1311         if (value[strlen(value) - 1] == '%')
1312                 return (int)(gain / (float)100);
1313
1314         return (int)gain;
1315 }
1316
1317 static int __unload_module(void)
1318 {
1319         struct phone_pvt *p, *pl;
1320         /* First, take us out of the channel loop */
1321         if (cur_tech)
1322                 ast_channel_unregister(cur_tech);
1323         if (!ast_mutex_lock(&iflock)) {
1324                 /* Hangup all interfaces if they have an owner */
1325                 p = iflist;
1326                 while(p) {
1327                         if (p->owner)
1328                                 ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1329                         p = p->next;
1330                 }
1331                 iflist = NULL;
1332                 ast_mutex_unlock(&iflock);
1333         } else {
1334                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
1335                 return -1;
1336         }
1337         if (!ast_mutex_lock(&monlock)) {
1338                 if (monitor_thread > AST_PTHREADT_NULL) {
1339                         monitor = 0;
1340                         while (pthread_kill(monitor_thread, SIGURG) == 0)
1341                                 sched_yield();
1342                         pthread_join(monitor_thread, NULL);
1343                 }
1344                 monitor_thread = AST_PTHREADT_STOP;
1345                 ast_mutex_unlock(&monlock);
1346         } else {
1347                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
1348                 return -1;
1349         }
1350
1351         if (!ast_mutex_lock(&iflock)) {
1352                 /* Destroy all the interfaces and free their memory */
1353                 p = iflist;
1354                 while(p) {
1355                         /* Close the socket, assuming it's real */
1356                         if (p->fd > -1)
1357                                 close(p->fd);
1358                         pl = p;
1359                         p = p->next;
1360                         /* Free associated memory */
1361                         ast_free(pl);
1362                 }
1363                 iflist = NULL;
1364                 ast_mutex_unlock(&iflock);
1365         } else {
1366                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
1367                 return -1;
1368         }
1369
1370         ao2_ref(phone_tech.capabilities, -1);
1371         ao2_ref(phone_tech_fxs.capabilities, -1);
1372         ao2_ref(prefcap, -1);
1373
1374         return 0;
1375 }
1376
1377 static int unload_module(void)
1378 {
1379         return __unload_module();
1380 }
1381
1382 static int load_module(void)
1383 {
1384         struct ast_config *cfg;
1385         struct ast_variable *v;
1386         struct phone_pvt *tmp;
1387         int mode = MODE_IMMEDIATE;
1388         int txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; /* default gain 1.0 */
1389         struct ast_flags config_flags = { 0 };
1390
1391         if (!(phone_tech.capabilities = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT))) {
1392                 return AST_MODULE_LOAD_DECLINE;
1393         }
1394
1395         ast_format_cap_append(phone_tech.capabilities, ast_format_g723, 0);
1396         ast_format_cap_append(phone_tech.capabilities, ast_format_slin, 0);
1397         ast_format_cap_append(phone_tech.capabilities, ast_format_ulaw, 0);
1398         ast_format_cap_append(phone_tech.capabilities, ast_format_g729, 0);
1399
1400         if (!(prefcap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT))) {
1401                 return AST_MODULE_LOAD_DECLINE;
1402         }
1403         ast_format_cap_append_from_cap(prefcap, phone_tech.capabilities, AST_MEDIA_TYPE_UNKNOWN);
1404         if (!(phone_tech_fxs.capabilities = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT))) {
1405                 return AST_MODULE_LOAD_DECLINE;
1406         }
1407
1408         if ((cfg = ast_config_load(config, config_flags)) == CONFIG_STATUS_FILEINVALID) {
1409                 ast_log(LOG_ERROR, "Config file %s is in an invalid format.  Aborting.\n", config);
1410                 return AST_MODULE_LOAD_DECLINE;
1411         }
1412
1413         /* We *must* have a config file otherwise stop immediately */
1414         if (!cfg) {
1415                 ast_log(LOG_ERROR, "Unable to load config %s\n", config);
1416                 return AST_MODULE_LOAD_DECLINE;
1417         }
1418         if (ast_mutex_lock(&iflock)) {
1419                 /* It's a little silly to lock it, but we mind as well just to be sure */
1420                 ast_log(LOG_ERROR, "Unable to lock interface list???\n");
1421                 return AST_MODULE_LOAD_FAILURE;
1422         }
1423         v = ast_variable_browse(cfg, "interfaces");
1424         while(v) {
1425                 /* Create the interface list */
1426                 if (!strcasecmp(v->name, "device")) {
1427                                 tmp = mkif(v->value, mode, txgain, rxgain);
1428                                 if (tmp) {
1429                                         tmp->next = iflist;
1430                                         iflist = tmp;
1431
1432                                 } else {
1433                                         ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
1434                                         ast_config_destroy(cfg);
1435                                         ast_mutex_unlock(&iflock);
1436                                         __unload_module();
1437                                         return AST_MODULE_LOAD_FAILURE;
1438                                 }
1439                 } else if (!strcasecmp(v->name, "silencesupression")) {
1440                         silencesupression = ast_true(v->value);
1441                 } else if (!strcasecmp(v->name, "language")) {
1442                         ast_copy_string(language, v->value, sizeof(language));
1443                 } else if (!strcasecmp(v->name, "callerid")) {
1444                         ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
1445                 } else if (!strcasecmp(v->name, "mode")) {
1446                         if (!strncasecmp(v->value, "di", 2))
1447                                 mode = MODE_DIALTONE;
1448                         else if (!strncasecmp(v->value, "sig", 3))
1449                                 mode = MODE_SIGMA;
1450                         else if (!strncasecmp(v->value, "im", 2))
1451                                 mode = MODE_IMMEDIATE;
1452                         else if (!strncasecmp(v->value, "fxs", 3)) {
1453                                 mode = MODE_FXS;
1454                                 ast_format_cap_remove_by_type(prefcap, AST_MEDIA_TYPE_AUDIO); /* All non-voice */
1455                         }
1456                         else if (!strncasecmp(v->value, "fx", 2))
1457                                 mode = MODE_FXO;
1458                         else
1459                                 ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
1460                 } else if (!strcasecmp(v->name, "context")) {
1461                         ast_copy_string(context, v->value, sizeof(context));
1462                 } else if (!strcasecmp(v->name, "format")) {
1463                         if (!strcasecmp(v->value, "g729")) {
1464                                 ast_format_cap_remove_by_type(prefcap, AST_MEDIA_TYPE_UNKNOWN);
1465                                 ast_format_cap_append(prefcap, ast_format_g729, 0);
1466                         } else if (!strcasecmp(v->value, "g723.1")) {
1467                                 ast_format_cap_remove_by_type(prefcap, AST_MEDIA_TYPE_UNKNOWN);
1468                                 ast_format_cap_append(prefcap, ast_format_g723, 0);
1469                         } else if (!strcasecmp(v->value, "slinear")) {
1470                                 if (mode == MODE_FXS) {
1471                                         ast_format_cap_append(prefcap, ast_format_slin, 0);
1472                                 } else {
1473                                         ast_format_cap_remove_by_type(prefcap, AST_MEDIA_TYPE_UNKNOWN);
1474                                         ast_format_cap_append(prefcap, ast_format_slin, 0);
1475                                 }
1476                         } else if (!strcasecmp(v->value, "ulaw")) {
1477                                 ast_format_cap_remove_by_type(prefcap, AST_MEDIA_TYPE_UNKNOWN);
1478                                 ast_format_cap_append(prefcap, ast_format_ulaw, 0);
1479                         } else
1480                                 ast_log(LOG_WARNING, "Unknown format '%s'\n", v->value);
1481                 } else if (!strcasecmp(v->name, "echocancel")) {
1482                         if (!strcasecmp(v->value, "off")) {
1483                                 echocancel = AEC_OFF;
1484                         } else if (!strcasecmp(v->value, "low")) {
1485                                 echocancel = AEC_LOW;
1486                         } else if (!strcasecmp(v->value, "medium")) {
1487                                 echocancel = AEC_MED;
1488                         } else if (!strcasecmp(v->value, "high")) {
1489                                 echocancel = AEC_HIGH;
1490                         } else
1491                                 ast_log(LOG_WARNING, "Unknown echo cancellation '%s'\n", v->value);
1492                 } else if (!strcasecmp(v->name, "txgain")) {
1493                         txgain = parse_gain_value(v->name, v->value);
1494                 } else if (!strcasecmp(v->name, "rxgain")) {
1495                         rxgain = parse_gain_value(v->name, v->value);
1496                 }
1497                 v = v->next;
1498         }
1499         ast_mutex_unlock(&iflock);
1500
1501         if (mode == MODE_FXS) {
1502                 ast_format_cap_append_from_cap(phone_tech_fxs.capabilities, prefcap, AST_MEDIA_TYPE_UNKNOWN);
1503                 cur_tech = &phone_tech_fxs;
1504         } else
1505                 cur_tech = (struct ast_channel_tech *) &phone_tech;
1506
1507         /* Make sure we can register our Adtranphone channel type */
1508
1509         if (ast_channel_register(cur_tech)) {
1510                 ast_log(LOG_ERROR, "Unable to register channel class 'Phone'\n");
1511                 ast_config_destroy(cfg);
1512                 __unload_module();
1513                 return AST_MODULE_LOAD_FAILURE;
1514         }
1515         ast_config_destroy(cfg);
1516         /* And start the monitor for the first time */
1517         restart_monitor();
1518         return AST_MODULE_LOAD_SUCCESS;
1519 }
1520
1521 AST_MODULE_INFO_STANDARD_EXTENDED(ASTERISK_GPL_KEY, "Linux Telephony API Support");
1522