Wed Aug 15 01:24:18 2007

Asterisk developer's documentation


chan_phone.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \brief Generic Linux Telephony Interface driver
00022  *
00023  * \author Mark Spencer <markster@digium.com>
00024  * 
00025  * \ingroup channel_drivers
00026  */
00027 
00028 /*** MODULEINFO
00029    <depend>ixjuser</depend>
00030  ***/
00031 
00032 #include "asterisk.h"
00033 
00034 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 74572 $")
00035 
00036 #include <stdio.h>
00037 #include <string.h>
00038 #include <ctype.h>
00039 #include <sys/socket.h>
00040 #include <sys/time.h>
00041 #include <errno.h>
00042 #include <unistd.h>
00043 #include <stdlib.h>
00044 #include <arpa/inet.h>
00045 #include <fcntl.h>
00046 #include <sys/ioctl.h>
00047 #include <signal.h>
00048 #ifdef HAVE_LINUX_COMPILER_H
00049 #include <linux/compiler.h>
00050 #endif
00051 #include <linux/telephony.h>
00052 /* Still use some IXJ specific stuff */
00053 #include <linux/version.h>
00054 #include <linux/ixjuser.h>
00055 
00056 #include "asterisk/lock.h"
00057 #include "asterisk/channel.h"
00058 #include "asterisk/config.h"
00059 #include "asterisk/logger.h"
00060 #include "asterisk/module.h"
00061 #include "asterisk/pbx.h"
00062 #include "asterisk/options.h"
00063 #include "asterisk/utils.h"
00064 #include "asterisk/callerid.h"
00065 #include "asterisk/causes.h"
00066 #include "asterisk/stringfields.h"
00067 #include "asterisk/musiconhold.h"
00068 
00069 #include "DialTone.h"
00070 
00071 #ifdef QTI_PHONEJACK_TJ_PCI   /* check for the newer quicknet driver v.3.1.0 which has this symbol */
00072 #define QNDRV_VER 310
00073 #else
00074 #define QNDRV_VER 100
00075 #endif
00076 
00077 #if QNDRV_VER > 100
00078 #ifdef __linux__
00079 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00080 #else /* FreeBSD and others */
00081 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, x);
00082 #endif /* __linux__ */
00083 #else /* older driver */
00084 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00085 #endif
00086 
00087 #define DEFAULT_CALLER_ID "Unknown"
00088 #define PHONE_MAX_BUF 480
00089 #define DEFAULT_GAIN 0x100
00090 
00091 static const char tdesc[] = "Standard Linux Telephony API Driver";
00092 static const char config[] = "phone.conf";
00093 
00094 /* Default context for dialtone mode */
00095 static char context[AST_MAX_EXTENSION] = "default";
00096 
00097 /* Default language */
00098 static char language[MAX_LANGUAGE] = "";
00099 
00100 static int echocancel = AEC_OFF;
00101 
00102 static int silencesupression = 0;
00103 
00104 static int prefformat = AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW;
00105 
00106 /* Protect the interface list (of phone_pvt's) */
00107 AST_MUTEX_DEFINE_STATIC(iflock);
00108 
00109 /* Protect the monitoring thread, so only one process can kill or start it, and not
00110    when it's doing something critical. */
00111 AST_MUTEX_DEFINE_STATIC(monlock);
00112 
00113 /* Boolean value whether the monitoring thread shall continue. */
00114 static unsigned int monitor;
00115    
00116 /* This is the thread for the monitor which checks for input on the channels
00117    which are not currently in use.  */
00118 static pthread_t monitor_thread = AST_PTHREADT_NULL;
00119 
00120 static int restart_monitor(void);
00121 
00122 /* The private structures of the Phone Jack channels are linked for
00123    selecting outgoing channels */
00124    
00125 #define MODE_DIALTONE   1
00126 #define MODE_IMMEDIATE  2
00127 #define MODE_FXO  3
00128 #define MODE_FXS        4
00129 #define MODE_SIGMA      5
00130 
00131 static struct phone_pvt {
00132    int fd;                    /* Raw file descriptor for this device */
00133    struct ast_channel *owner;    /* Channel we belong to, possibly NULL */
00134    int mode;                  /* Is this in the  */
00135    int lastformat;               /* Last output format */
00136    int lastinput;             /* Last input format */
00137    int ministate;             /* Miniature state, for dialtone mode */
00138    char dev[256];             /* Device name */
00139    struct phone_pvt *next;       /* Next channel in list */
00140    struct ast_frame fr;       /* Frame */
00141    char offset[AST_FRIENDLY_OFFSET];
00142    char buf[PHONE_MAX_BUF];               /* Static buffer for reading frames */
00143    int obuflen;
00144    int dialtone;
00145    int txgain, rxgain;             /* gain control for playing, recording  */
00146                            /* 0x100 - 1.0, 0x200 - 2.0, 0x80 - 0.5 */
00147    int cpt;                /* Call Progress Tone playing? */
00148    int silencesupression;
00149    char context[AST_MAX_EXTENSION];
00150    char obuf[PHONE_MAX_BUF * 2];
00151    char ext[AST_MAX_EXTENSION];
00152    char language[MAX_LANGUAGE];
00153    char cid_num[AST_MAX_EXTENSION];
00154    char cid_name[AST_MAX_EXTENSION];
00155 } *iflist = NULL;
00156 
00157 static char cid_num[AST_MAX_EXTENSION];
00158 static char cid_name[AST_MAX_EXTENSION];
00159 
00160 static struct ast_channel *phone_request(const char *type, int format, void *data, int *cause);
00161 static int phone_digit_begin(struct ast_channel *ast, char digit);
00162 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00163 static int phone_call(struct ast_channel *ast, char *dest, int timeout);
00164 static int phone_hangup(struct ast_channel *ast);
00165 static int phone_answer(struct ast_channel *ast);
00166 static struct ast_frame *phone_read(struct ast_channel *ast);
00167 static int phone_write(struct ast_channel *ast, struct ast_frame *frame);
00168 static struct ast_frame *phone_exception(struct ast_channel *ast);
00169 static int phone_send_text(struct ast_channel *ast, const char *text);
00170 static int phone_fixup(struct ast_channel *old, struct ast_channel *new);
00171 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen);
00172 
00173 static const struct ast_channel_tech phone_tech = {
00174    .type = "Phone",
00175    .description = tdesc,
00176    .capabilities = AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW,
00177    .requester = phone_request,
00178    .send_digit_begin = phone_digit_begin,
00179    .send_digit_end = phone_digit_end,
00180    .call = phone_call,
00181    .hangup = phone_hangup,
00182    .answer = phone_answer,
00183    .read = phone_read,
00184    .write = phone_write,
00185    .exception = phone_exception,
00186    .indicate = phone_indicate,
00187    .fixup = phone_fixup
00188 };
00189 
00190 static struct ast_channel_tech phone_tech_fxs = {
00191    .type = "Phone",
00192    .description = tdesc,
00193    .requester = phone_request,
00194    .send_digit_begin = phone_digit_begin,
00195    .send_digit_end = phone_digit_end,
00196    .call = phone_call,
00197    .hangup = phone_hangup,
00198    .answer = phone_answer,
00199    .read = phone_read,
00200    .write = phone_write,
00201    .exception = phone_exception,
00202    .write_video = phone_write,
00203    .send_text = phone_send_text,
00204    .indicate = phone_indicate,
00205    .fixup = phone_fixup
00206 };
00207 
00208 static struct ast_channel_tech *cur_tech;
00209 
00210 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen)
00211 {
00212    struct phone_pvt *p = chan->tech_pvt;
00213    int res=-1;
00214    ast_log(LOG_DEBUG, "Requested indication %d on channel %s\n", condition, chan->name);
00215    switch(condition) {
00216       case AST_CONTROL_FLASH:
00217          ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00218          usleep(320000);
00219          ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00220          p->lastformat = -1;
00221          res = 0;
00222          break;
00223       case AST_CONTROL_HOLD:
00224          ast_moh_start(chan, data, NULL);
00225          break;
00226       case AST_CONTROL_UNHOLD:
00227          ast_moh_stop(chan);
00228          break;
00229       default:
00230          ast_log(LOG_WARNING, "Condition %d is not supported on channel %s\n", condition, chan->name);
00231    }
00232    return res;
00233 }
00234 
00235 static int phone_fixup(struct ast_channel *old, struct ast_channel *new)
00236 {
00237    struct phone_pvt *pvt = old->tech_pvt;
00238    if (pvt && pvt->owner == old)
00239       pvt->owner = new;
00240    return 0;
00241 }
00242 
00243 static int phone_digit_begin(struct ast_channel *chan, char digit)
00244 {
00245    /* XXX Modify this callback to let Asterisk support controlling the length of DTMF */
00246    return 0;
00247 }
00248 
00249 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
00250 {
00251    struct phone_pvt *p;
00252    int outdigit;
00253    p = ast->tech_pvt;
00254    ast_log(LOG_DEBUG, "Dialed %c\n", digit);
00255    switch(digit) {
00256    case '0':
00257    case '1':
00258    case '2':
00259    case '3':
00260    case '4':
00261    case '5':
00262    case '6':
00263    case '7':
00264    case '8':
00265    case '9':
00266       outdigit = digit - '0';
00267       break;
00268    case '*':
00269       outdigit = 11;
00270       break;
00271    case '#':
00272       outdigit = 12;
00273       break;
00274    case 'f':   /*flash*/
00275    case 'F':
00276       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00277       usleep(320000);
00278       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00279       p->lastformat = -1;
00280       return 0;
00281    default:
00282       ast_log(LOG_WARNING, "Unknown digit '%c'\n", digit);
00283       return -1;
00284    }
00285    ast_log(LOG_DEBUG, "Dialed %d\n", outdigit);
00286    ioctl(p->fd, PHONE_PLAY_TONE, outdigit);
00287    p->lastformat = -1;
00288    return 0;
00289 }
00290 
00291 static int phone_call(struct ast_channel *ast, char *dest, int timeout)
00292 {
00293    struct phone_pvt *p;
00294 
00295    PHONE_CID cid;
00296    time_t UtcTime;
00297    struct tm tm;
00298    int start;
00299 
00300    time(&UtcTime);
00301    ast_localtime(&UtcTime, &tm, NULL);
00302 
00303    memset(&cid, 0, sizeof(PHONE_CID));
00304    if(&tm != NULL) {
00305       snprintf(cid.month, sizeof(cid.month), "%02d",(tm.tm_mon + 1));
00306       snprintf(cid.day, sizeof(cid.day),     "%02d", tm.tm_mday);
00307       snprintf(cid.hour, sizeof(cid.hour),   "%02d", tm.tm_hour);
00308       snprintf(cid.min, sizeof(cid.min),     "%02d", tm.tm_min);
00309    }
00310    /* the standard format of ast->callerid is:  "name" <number>, but not always complete */
00311    if (ast_strlen_zero(ast->cid.cid_name))
00312       strcpy(cid.name, DEFAULT_CALLER_ID);
00313    else
00314       ast_copy_string(cid.name, ast->cid.cid_name, sizeof(cid.name));
00315 
00316    if (ast->cid.cid_num) 
00317       ast_copy_string(cid.number, ast->cid.cid_num, sizeof(cid.number));
00318 
00319    p = ast->tech_pvt;
00320 
00321    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
00322       ast_log(LOG_WARNING, "phone_call called on %s, neither down nor reserved\n", ast->name);
00323       return -1;
00324    }
00325    if (option_debug)
00326       ast_log(LOG_DEBUG, "Ringing %s on %s (%d)\n", dest, ast->name, ast->fds[0]);
00327 
00328    start = IXJ_PHONE_RING_START(cid);
00329    if (start == -1)
00330       return -1;
00331    
00332    if (p->mode == MODE_FXS) {
00333       char *digit = strchr(dest, '/');
00334       if (digit)
00335       {
00336         digit++;
00337         while (*digit)
00338           phone_digit_end(ast, *digit++, 0);
00339       }
00340    }
00341  
00342    ast_setstate(ast, AST_STATE_RINGING);
00343    ast_queue_control(ast, AST_CONTROL_RINGING);
00344    return 0;
00345 }
00346 
00347 static int phone_hangup(struct ast_channel *ast)
00348 {
00349    struct phone_pvt *p;
00350    p = ast->tech_pvt;
00351    if (option_debug)
00352       ast_log(LOG_DEBUG, "phone_hangup(%s)\n", ast->name);
00353    if (!ast->tech_pvt) {
00354       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00355       return 0;
00356    }
00357    /* XXX Is there anything we can do to really hang up except stop recording? */
00358    ast_setstate(ast, AST_STATE_DOWN);
00359    if (ioctl(p->fd, PHONE_REC_STOP))
00360       ast_log(LOG_WARNING, "Failed to stop recording\n");
00361    if (ioctl(p->fd, PHONE_PLAY_STOP))
00362       ast_log(LOG_WARNING, "Failed to stop playing\n");
00363    if (ioctl(p->fd, PHONE_RING_STOP))
00364       ast_log(LOG_WARNING, "Failed to stop ringing\n");
00365    if (ioctl(p->fd, PHONE_CPT_STOP))
00366       ast_log(LOG_WARNING, "Failed to stop sounds\n");
00367 
00368    /* If it's an FXO, hang them up */
00369    if (p->mode == MODE_FXO) {
00370       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK)) 
00371          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",ast->name, strerror(errno));
00372    }
00373 
00374    /* If they're off hook, give a busy signal */
00375    if (ioctl(p->fd, PHONE_HOOKSTATE)) {
00376       if (option_debug)
00377          ast_log(LOG_DEBUG, "Got hunghup, giving busy signal\n");
00378       ioctl(p->fd, PHONE_BUSY);
00379       p->cpt = 1;
00380    }
00381    p->lastformat = -1;
00382    p->lastinput = -1;
00383    p->ministate = 0;
00384    p->obuflen = 0;
00385    p->dialtone = 0;
00386    memset(p->ext, 0, sizeof(p->ext));
00387    ((struct phone_pvt *)(ast->tech_pvt))->owner = NULL;
00388    ast_module_unref(ast_module_info->self);
00389    if (option_verbose > 2) 
00390       ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", ast->name);
00391    ast->tech_pvt = NULL;
00392    ast_setstate(ast, AST_STATE_DOWN);
00393    restart_monitor();
00394    return 0;
00395 }
00396 
00397 static int phone_setup(struct ast_channel *ast)
00398 {
00399    struct phone_pvt *p;
00400    p = ast->tech_pvt;
00401    ioctl(p->fd, PHONE_CPT_STOP);
00402    /* Nothing to answering really, just start recording */
00403    if (ast->rawreadformat == AST_FORMAT_G723_1) {
00404       /* Prefer g723 */
00405       ioctl(p->fd, PHONE_REC_STOP);
00406       if (p->lastinput != AST_FORMAT_G723_1) {
00407          p->lastinput = AST_FORMAT_G723_1;
00408          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00409             ast_log(LOG_WARNING, "Failed to set codec to g723.1\n");
00410             return -1;
00411          }
00412       }
00413    } else if (ast->rawreadformat == AST_FORMAT_SLINEAR) {
00414       ioctl(p->fd, PHONE_REC_STOP);
00415       if (p->lastinput != AST_FORMAT_SLINEAR) {
00416          p->lastinput = AST_FORMAT_SLINEAR;
00417          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00418             ast_log(LOG_WARNING, "Failed to set codec to signed linear 16\n");
00419             return -1;
00420          }
00421       }
00422    } else if (ast->rawreadformat == AST_FORMAT_ULAW) {
00423       ioctl(p->fd, PHONE_REC_STOP);
00424       if (p->lastinput != AST_FORMAT_ULAW) {
00425          p->lastinput = AST_FORMAT_ULAW;
00426          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00427             ast_log(LOG_WARNING, "Failed to set codec to uLaw\n");
00428             return -1;
00429          }
00430       }
00431    } else if (p->mode == MODE_FXS) {
00432       ioctl(p->fd, PHONE_REC_STOP);
00433       if (p->lastinput != ast->rawreadformat) {
00434          p->lastinput = ast->rawreadformat;
00435          if (ioctl(p->fd, PHONE_REC_CODEC, ast->rawreadformat)) {
00436             ast_log(LOG_WARNING, "Failed to set codec to %d\n", 
00437                ast->rawreadformat);
00438             return -1;
00439          }
00440       }
00441    } else {
00442       ast_log(LOG_WARNING, "Can't do format %s\n", ast_getformatname(ast->rawreadformat));
00443       return -1;
00444    }
00445    if (ioctl(p->fd, PHONE_REC_START)) {
00446       ast_log(LOG_WARNING, "Failed to start recording\n");
00447       return -1;
00448    }
00449    /* set the DTMF times (the default is too short) */
00450    ioctl(p->fd, PHONE_SET_TONE_ON_TIME, 300);
00451    ioctl(p->fd, PHONE_SET_TONE_OFF_TIME, 200);
00452    return 0;
00453 }
00454 
00455 static int phone_answer(struct ast_channel *ast)
00456 {
00457    struct phone_pvt *p;
00458    p = ast->tech_pvt;
00459    /* In case it's a LineJack, take it off hook */
00460    if (p->mode == MODE_FXO) {
00461       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_OFF_HOOK)) 
00462          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n", ast->name, strerror(errno));
00463       else
00464          ast_log(LOG_DEBUG, "Took linejack off hook\n");
00465    }
00466    phone_setup(ast);
00467    if (option_debug)
00468       ast_log(LOG_DEBUG, "phone_answer(%s)\n", ast->name);
00469    ast->rings = 0;
00470    ast_setstate(ast, AST_STATE_UP);
00471    return 0;
00472 }
00473 
00474 #if 0
00475 static char phone_2digit(char c)
00476 {
00477    if (c == 12)
00478       return '#';
00479    else if (c == 11)
00480       return '*';
00481    else if ((c < 10) && (c >= 0))
00482       return '0' + c - 1;
00483    else
00484       return '?';
00485 }
00486 #endif
00487 
00488 static struct ast_frame  *phone_exception(struct ast_channel *ast)
00489 {
00490    int res;
00491    union telephony_exception phonee;
00492    struct phone_pvt *p = ast->tech_pvt;
00493    char digit;
00494 
00495    /* Some nice norms */
00496    p->fr.datalen = 0;
00497    p->fr.samples = 0;
00498    p->fr.data =  NULL;
00499    p->fr.src = "Phone";
00500    p->fr.offset = 0;
00501    p->fr.mallocd=0;
00502    p->fr.delivery = ast_tv(0,0);
00503    
00504    phonee.bytes = ioctl(p->fd, PHONE_EXCEPTION);
00505    if (phonee.bits.dtmf_ready)  {
00506       if (option_debug)
00507          ast_log(LOG_DEBUG, "phone_exception(): DTMF\n");
00508    
00509       /* We've got a digit -- Just handle this nicely and easily */
00510       digit =  ioctl(p->fd, PHONE_GET_DTMF_ASCII);
00511       p->fr.subclass = digit;
00512       p->fr.frametype = AST_FRAME_DTMF;
00513       return &p->fr;
00514    }
00515    if (phonee.bits.hookstate) {
00516       if (option_debug)
00517          ast_log(LOG_DEBUG, "Hookstate changed\n");
00518       res = ioctl(p->fd, PHONE_HOOKSTATE);
00519       /* See if we've gone on hook, if so, notify by returning NULL */
00520       if (option_debug)
00521          ast_log(LOG_DEBUG, "New hookstate: %d\n", res);
00522       if (!res && (p->mode != MODE_FXO))
00523          return NULL;
00524       else {
00525          if (ast->_state == AST_STATE_RINGING) {
00526             /* They've picked up the phone */
00527             p->fr.frametype = AST_FRAME_CONTROL;
00528             p->fr.subclass = AST_CONTROL_ANSWER;
00529             phone_setup(ast);
00530             ast_setstate(ast, AST_STATE_UP);
00531             return &p->fr;
00532          }  else 
00533             ast_log(LOG_WARNING, "Got off hook in weird state %d\n", ast->_state);
00534       }
00535    }
00536 #if 1
00537    if (phonee.bits.pstn_ring)
00538       ast_verbose("Unit is ringing\n");
00539    if (phonee.bits.caller_id) {
00540       ast_verbose("We have caller ID\n");
00541    }
00542    if (phonee.bits.pstn_wink)
00543       ast_verbose("Detected Wink\n");
00544 #endif
00545    /* Strange -- nothing there.. */
00546    p->fr.frametype = AST_FRAME_NULL;
00547    p->fr.subclass = 0;
00548    return &p->fr;
00549 }
00550 
00551 static struct ast_frame  *phone_read(struct ast_channel *ast)
00552 {
00553    int res;
00554    struct phone_pvt *p = ast->tech_pvt;
00555    
00556 
00557    /* Some nice norms */
00558    p->fr.datalen = 0;
00559    p->fr.samples = 0;
00560    p->fr.data =  NULL;
00561    p->fr.src = "Phone";
00562    p->fr.offset = 0;
00563    p->fr.mallocd=0;
00564    p->fr.delivery = ast_tv(0,0);
00565 
00566    /* Try to read some data... */
00567    CHECK_BLOCKING(ast);
00568    res = read(p->fd, p->buf, PHONE_MAX_BUF);
00569    ast_clear_flag(ast, AST_FLAG_BLOCKING);
00570    if (res < 0) {
00571 #if 0
00572       if (errno == EAGAIN) {
00573          ast_log(LOG_WARNING, "Null frame received\n");
00574          p->fr.frametype = AST_FRAME_NULL;
00575          p->fr.subclass = 0;
00576          return &p->fr;
00577       }
00578 #endif
00579       ast_log(LOG_WARNING, "Error reading: %s\n", strerror(errno));
00580       return NULL;
00581    }
00582    p->fr.data = p->buf;
00583    if (p->mode != MODE_FXS)
00584    switch(p->buf[0] & 0x3) {
00585    case '0':
00586    case '1':
00587       /* Normal */
00588       break;
00589    case '2':
00590    case '3':
00591       /* VAD/CNG, only send two words */
00592       res = 4;
00593       break;
00594    }
00595    p->fr.samples = 240;
00596    p->fr.datalen = res;
00597    p->fr.frametype = p->lastinput <= AST_FORMAT_MAX_AUDIO ?
00598                           AST_FRAME_VOICE : 
00599            p->lastinput <= AST_FORMAT_PNG ? AST_FRAME_IMAGE 
00600            : AST_FRAME_VIDEO;
00601    p->fr.subclass = p->lastinput;
00602    p->fr.offset = AST_FRIENDLY_OFFSET;
00603    /* Byteswap from little-endian to native-endian */
00604    if (p->fr.subclass == AST_FORMAT_SLINEAR)
00605       ast_frame_byteswap_le(&p->fr);
00606    return &p->fr;
00607 }
00608 
00609 static int phone_write_buf(struct phone_pvt *p, const char *buf, int len, int frlen, int swap)
00610 {
00611    int res;
00612    /* Store as much of the buffer as we can, then write fixed frames */
00613    int space = sizeof(p->obuf) - p->obuflen;
00614    /* Make sure we have enough buffer space to store the frame */
00615    if (space < len)
00616       len = space;
00617    if (swap)
00618       ast_swapcopy_samples(p->obuf+p->obuflen, buf, len/2);
00619    else
00620       memcpy(p->obuf + p->obuflen, buf, len);
00621    p->obuflen += len;
00622    while(p->obuflen > frlen) {
00623       res = write(p->fd, p->obuf, frlen);
00624       if (res != frlen) {
00625          if (res < 1) {
00626 /*
00627  * Card is in non-blocking mode now and it works well now, but there are
00628  * lot of messages like this. So, this message is temporarily disabled.
00629  */
00630             return 0;
00631          } else {
00632             ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frlen);
00633          }
00634       }
00635       p->obuflen -= frlen;
00636       /* Move memory if necessary */
00637       if (p->obuflen) 
00638          memmove(p->obuf, p->obuf + frlen, p->obuflen);
00639    }
00640    return len;
00641 }
00642 
00643 static int phone_send_text(struct ast_channel *ast, const char *text)
00644 {
00645     int length = strlen(text);
00646     return phone_write_buf(ast->tech_pvt, text, length, length, 0) == 
00647            length ? 0 : -1;
00648 }
00649 
00650 static int phone_write(struct ast_channel *ast, struct ast_frame *frame)
00651 {
00652    struct phone_pvt *p = ast->tech_pvt;
00653    int res;
00654    int maxfr=0;
00655    char *pos;
00656    int sofar;
00657    int expected;
00658    int codecset = 0;
00659    char tmpbuf[4];
00660    /* Write a frame of (presumably voice) data */
00661    if (frame->frametype != AST_FRAME_VOICE && p->mode != MODE_FXS) {
00662       if (frame->frametype != AST_FRAME_IMAGE)
00663          ast_log(LOG_WARNING, "Don't know what to do with  frame type '%d'\n", frame->frametype);
00664       return 0;
00665    }
00666    if (!(frame->subclass &
00667       (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) && 
00668        p->mode != MODE_FXS) {
00669       ast_log(LOG_WARNING, "Cannot handle frames in %d format\n", frame->subclass);
00670       return -1;
00671    }
00672 #if 0
00673    /* If we're not in up mode, go into up mode now */
00674    if (ast->_state != AST_STATE_UP) {
00675       ast_setstate(ast, AST_STATE_UP);
00676       phone_setup(ast);
00677    }
00678 #else
00679    if (ast->_state != AST_STATE_UP) {
00680       /* Don't try tos end audio on-hook */
00681       return 0;
00682    }
00683 #endif   
00684    if (frame->subclass == AST_FORMAT_G723_1) {
00685       if (p->lastformat != AST_FORMAT_G723_1) {
00686          ioctl(p->fd, PHONE_PLAY_STOP);
00687          ioctl(p->fd, PHONE_REC_STOP);
00688          if (ioctl(p->fd, PHONE_PLAY_CODEC, G723_63)) {
00689             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00690             return -1;
00691          }
00692          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00693             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00694             return -1;
00695          }
00696          p->lastformat = AST_FORMAT_G723_1;
00697          p->lastinput = AST_FORMAT_G723_1;
00698          /* Reset output buffer */
00699          p->obuflen = 0;
00700          codecset = 1;
00701       }
00702       if (frame->datalen > 24) {
00703          ast_log(LOG_WARNING, "Frame size too large for G.723.1 (%d bytes)\n", frame->datalen);
00704          return -1;
00705       }
00706       maxfr = 24;
00707    } else if (frame->subclass == AST_FORMAT_SLINEAR) {
00708       if (p->lastformat != AST_FORMAT_SLINEAR) {
00709          ioctl(p->fd, PHONE_PLAY_STOP);
00710          ioctl(p->fd, PHONE_REC_STOP);
00711          if (ioctl(p->fd, PHONE_PLAY_CODEC, LINEAR16)) {
00712             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00713             return -1;
00714          }
00715          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00716             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00717             return -1;
00718          }
00719          p->lastformat = AST_FORMAT_SLINEAR;
00720          p->lastinput = AST_FORMAT_SLINEAR;
00721          codecset = 1;
00722          /* Reset output buffer */
00723          p->obuflen = 0;
00724       }
00725       maxfr = 480;
00726    } else if (frame->subclass == AST_FORMAT_ULAW) {
00727       if (p->lastformat != AST_FORMAT_ULAW) {
00728          ioctl(p->fd, PHONE_PLAY_STOP);
00729          ioctl(p->fd, PHONE_REC_STOP);
00730          if (ioctl(p->fd, PHONE_PLAY_CODEC, ULAW)) {
00731             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00732             return -1;
00733          }
00734          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00735             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00736             return -1;
00737          }
00738          p->lastformat = AST_FORMAT_ULAW;
00739          p->lastinput = AST_FORMAT_ULAW;
00740          codecset = 1;
00741          /* Reset output buffer */
00742          p->obuflen = 0;
00743       }
00744       maxfr = 240;
00745    } else {
00746       if (p->lastformat != frame->subclass) {
00747          ioctl(p->fd, PHONE_PLAY_STOP);
00748          ioctl(p->fd, PHONE_REC_STOP);
00749          if (ioctl(p->fd, PHONE_PLAY_CODEC, frame->subclass)) {
00750             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00751                frame->subclass);
00752             return -1;
00753          }
00754          if (ioctl(p->fd, PHONE_REC_CODEC, frame->subclass)) {
00755             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00756                frame->subclass);
00757             return -1;
00758          }
00759          p->lastformat = frame->subclass;
00760          p->lastinput = frame->subclass;
00761          codecset = 1;
00762          /* Reset output buffer */
00763          p->obuflen = 0;
00764       }
00765       maxfr = 480;
00766    }
00767    if (codecset) {
00768       ioctl(p->fd, PHONE_REC_DEPTH, 3);
00769       ioctl(p->fd, PHONE_PLAY_DEPTH, 3);
00770       if (ioctl(p->fd, PHONE_PLAY_START)) {
00771          ast_log(LOG_WARNING, "Failed to start playback\n");
00772          return -1;
00773       }
00774       if (ioctl(p->fd, PHONE_REC_START)) {
00775          ast_log(LOG_WARNING, "Failed to start recording\n");
00776          return -1;
00777       }
00778    }
00779    /* If we get here, we have a frame of Appropriate data */
00780    sofar = 0;
00781    pos = frame->data;
00782    while(sofar < frame->datalen) {
00783       /* Write in no more than maxfr sized frames */
00784       expected = frame->datalen - sofar;
00785       if (maxfr < expected)
00786          expected = maxfr;
00787       /* XXX Internet Phone Jack does not handle the 4-byte VAD frame properly! XXX 
00788          we have to pad it to 24 bytes still.  */
00789       if (frame->datalen == 4) {
00790          if (p->silencesupression) {
00791             memset(tmpbuf + 4, 0, sizeof(tmpbuf) - 4);
00792             memcpy(tmpbuf, frame->data, 4);
00793             expected = 24;
00794             res = phone_write_buf(p, tmpbuf, expected, maxfr, 0);
00795          }
00796          res = 4;
00797          expected=4;
00798       } else {
00799          int swap = 0;
00800 #if __BYTE_ORDER == __BIG_ENDIAN
00801          if (frame->subclass == AST_FORMAT_SLINEAR)
00802             swap = 1; /* Swap big-endian samples to little-endian as we copy */
00803 #endif
00804          res = phone_write_buf(p, pos, expected, maxfr, swap);
00805       }
00806       if (res != expected) {
00807          if ((errno != EAGAIN) && (errno != EINTR)) {
00808             if (res < 0) 
00809                ast_log(LOG_WARNING, "Write returned error (%s)\n", strerror(errno));
00810    /*
00811     * Card is in non-blocking mode now and it works well now, but there are
00812     * lot of messages like this. So, this message is temporarily disabled.
00813     */
00814 #if 0
00815             else
00816                ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frame->datalen);
00817 #endif
00818             return -1;
00819          } else /* Pretend it worked */
00820             res = expected;
00821       }
00822       sofar += res;
00823       pos += res;
00824    }
00825    return 0;
00826 }
00827 
00828 static struct ast_channel *phone_new(struct phone_pvt *i, int state, char *context)
00829 {
00830    struct ast_channel *tmp;
00831    struct phone_codec_data codec;
00832    tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "", i->ext, i->context, 0, "Phone/%s", i->dev + 5);
00833    if (tmp) {
00834       tmp->tech = cur_tech;
00835       tmp->fds[0] = i->fd;
00836       /* XXX Switching formats silently causes kernel panics XXX */
00837       if (i->mode == MODE_FXS &&
00838           ioctl(i->fd, PHONE_QUERY_CODEC, &codec) == 0) {
00839          if (codec.type == LINEAR16)
00840             tmp->nativeformats =
00841             tmp->rawreadformat =
00842             tmp->rawwriteformat =
00843             AST_FORMAT_SLINEAR;
00844          else {
00845             tmp->nativeformats =
00846             tmp->rawreadformat =
00847             tmp->rawwriteformat =
00848             prefformat & ~AST_FORMAT_SLINEAR;
00849          }
00850       }
00851       else {
00852          tmp->nativeformats = prefformat;
00853          tmp->rawreadformat = prefformat;
00854          tmp->rawwriteformat = prefformat;
00855       }
00856       /* no need to call ast_setstate: the channel_alloc already did its job */
00857       if (state == AST_STATE_RING)
00858          tmp->rings = 1;
00859       tmp->tech_pvt = i;
00860       ast_copy_string(tmp->context, context, sizeof(tmp->context));
00861       if (!ast_strlen_zero(i->ext))
00862          ast_copy_string(tmp->exten, i->ext, sizeof(tmp->exten));
00863       else
00864          strcpy(tmp->exten, "s");
00865       if (!ast_strlen_zero(i->language))
00866          ast_string_field_set(tmp, language, i->language);
00867 
00868       /* Don't use ast_set_callerid() here because it will
00869        * generate a NewCallerID event before the NewChannel event */
00870       tmp->cid.cid_num = ast_strdup(i->cid_num);
00871       tmp->cid.cid_ani = ast_strdup(i->cid_num);
00872       tmp->cid.cid_name = ast_strdup(i->cid_name);
00873 
00874       i->owner = tmp;
00875       ast_module_ref(ast_module_info->self);
00876       if (state != AST_STATE_DOWN) {
00877          if (state == AST_STATE_RING) {
00878             ioctl(tmp->fds[0], PHONE_RINGBACK);
00879             i->cpt = 1;
00880          }
00881          if (ast_pbx_start(tmp)) {
00882             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00883             ast_hangup(tmp);
00884          }
00885       }
00886    } else
00887       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
00888    return tmp;
00889 }
00890 
00891 static void phone_mini_packet(struct phone_pvt *i)
00892 {
00893    int res;
00894    char buf[1024];
00895    /* Ignore stuff we read... */
00896    res = read(i->fd, buf, sizeof(buf));
00897    if (res < 1) {
00898       ast_log(LOG_WARNING, "Read returned %d: %s\n", res, strerror(errno));
00899       return;
00900    }
00901 }
00902 
00903 static void phone_check_exception(struct phone_pvt *i)
00904 {
00905    int offhook=0;
00906    char digit[2] = {0 , 0};
00907    union telephony_exception phonee;
00908    /* XXX Do something XXX */
00909 #if 0
00910    ast_log(LOG_DEBUG, "Exception!\n");
00911 #endif
00912    phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION);
00913    if (phonee.bits.dtmf_ready)  {
00914       digit[0] = ioctl(i->fd, PHONE_GET_DTMF_ASCII);
00915       if (i->mode == MODE_DIALTONE || i->mode == MODE_FXS || i->mode == MODE_SIGMA) {
00916          ioctl(i->fd, PHONE_PLAY_STOP);
00917          ioctl(i->fd, PHONE_REC_STOP);
00918          ioctl(i->fd, PHONE_CPT_STOP);
00919          i->dialtone = 0;
00920          if (strlen(i->ext) < AST_MAX_EXTENSION - 1)
00921             strncat(i->ext, digit, sizeof(i->ext) - strlen(i->ext) - 1);
00922          if ((i->mode != MODE_FXS ||
00923               !(phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION)) ||
00924               !phonee.bits.dtmf_ready) &&
00925              ast_exists_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00926             /* It's a valid extension in its context, get moving! */
00927             phone_new(i, AST_STATE_RING, i->context);
00928             /* No need to restart monitor, we are the monitor */
00929          } else if (!ast_canmatch_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00930             /* There is nothing in the specified extension that can match anymore.
00931                Try the default */
00932             if (ast_exists_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00933                /* Check the default, too... */
00934                phone_new(i, AST_STATE_RING, "default");
00935                /* XXX This should probably be justified better XXX */
00936             }  else if (!ast_canmatch_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00937                /* It's not a valid extension, give a busy signal */
00938                if (option_debug)
00939                   ast_log(LOG_DEBUG, "%s can't match anything in %s or default\n", i->ext, i->context);
00940                ioctl(i->fd, PHONE_BUSY);
00941                i->cpt = 1;
00942             }
00943          }
00944 #if 0
00945          ast_verbose("Extension is %s\n", i->ext);
00946 #endif
00947       }
00948    }
00949    if (phonee.bits.hookstate) {
00950       offhook = ioctl(i->fd, PHONE_HOOKSTATE);
00951       if (offhook) {
00952          if (i->mode == MODE_IMMEDIATE) {
00953             phone_new(i, AST_STATE_RING, i->context);
00954          } else if (i->mode == MODE_DIALTONE) {
00955             ast_module_ref(ast_module_info->self);
00956             /* Reset the extension */
00957             i->ext[0] = '\0';
00958             /* Play the dialtone */
00959             i->dialtone++;
00960             ioctl(i->fd, PHONE_PLAY_STOP);
00961             ioctl(i->fd, PHONE_PLAY_CODEC, ULAW);
00962             ioctl(i->fd, PHONE_PLAY_START);
00963             i->lastformat = -1;
00964          } else if (i->mode == MODE_SIGMA) {
00965             ast_module_ref(ast_module_info->self);
00966             /* Reset the extension */
00967             i->ext[0] = '\0';
00968             /* Play the dialtone */
00969             i->dialtone++;
00970             ioctl(i->fd, PHONE_DIALTONE);
00971          }
00972       } else {
00973          if (i->dialtone)
00974             ast_module_unref(ast_module_info->self);
00975          memset(i->ext, 0, sizeof(i->ext));
00976          if (i->cpt)
00977          {
00978             ioctl(i->fd, PHONE_CPT_STOP);
00979             i->cpt = 0;
00980          }
00981          ioctl(i->fd, PHONE_PLAY_STOP);
00982          ioctl(i->fd, PHONE_REC_STOP);
00983          i->dialtone = 0;
00984          i->lastformat = -1;
00985       }
00986    }
00987    if (phonee.bits.pstn_ring) {
00988       ast_verbose("Unit is ringing\n");
00989       phone_new(i, AST_STATE_RING, i->context);
00990    }
00991    if (phonee.bits.caller_id)
00992       ast_verbose("We have caller ID\n");
00993    
00994    
00995 }
00996 
00997 static void *do_monitor(void *data)
00998 {
00999    fd_set rfds, efds;
01000    int n, res;
01001    struct phone_pvt *i;
01002    int tonepos = 0;
01003    /* The tone we're playing this round */
01004    struct timeval tv = {0,0};
01005    int dotone;
01006    /* This thread monitors all the frame relay interfaces which are not yet in use
01007       (and thus do not have a separate thread) indefinitely */
01008    while (monitor) {
01009       /* Don't let anybody kill us right away.  Nobody should lock the interface list
01010          and wait for the monitor list, but the other way around is okay. */
01011       /* Lock the interface list */
01012       if (ast_mutex_lock(&iflock)) {
01013          ast_log(LOG_ERROR, "Unable to grab interface lock\n");
01014          return NULL;
01015       }
01016       /* Build the stuff we're going to select on, that is the socket of every
01017          phone_pvt that does not have an associated owner channel */
01018       n = -1;
01019       FD_ZERO(&rfds);
01020       FD_ZERO(&efds);
01021       i = iflist;
01022       dotone = 0;
01023       while (i) {
01024          if (FD_ISSET(i->fd, &rfds)) 
01025             ast_log(LOG_WARNING, "Descriptor %d appears twice (%s)?\n", i->fd, i->dev);
01026          if (!i->owner) {
01027             /* This needs to be watched, as it lacks an owner */
01028             FD_SET(i->fd, &rfds);
01029             FD_SET(i->fd, &efds);
01030             if (i->fd > n)
01031                n = i->fd;
01032             if (i->dialtone && i->mode != MODE_SIGMA) {
01033                /* Remember we're going to have to come back and play
01034                   more dialtones */
01035                if (ast_tvzero(tv)) {
01036                   /* If we're due for a dialtone, play one */
01037                   if (write(i->fd, DialTone + tonepos, 240) != 240)
01038                      ast_log(LOG_WARNING, "Dial tone write error\n");
01039                }
01040                dotone++;
01041             }
01042          }
01043          
01044          i = i->next;
01045       }
01046       /* Okay, now that we know what to do, release the interface lock */
01047       ast_mutex_unlock(&iflock);
01048 
01049       /* Wait indefinitely for something to happen */
01050       if (dotone && i && i->mode != MODE_SIGMA) {
01051          /* If we're ready to recycle the time, set it to 30 ms */
01052          tonepos += 240;
01053          if (tonepos >= sizeof(DialTone))
01054                tonepos = 0;
01055          if (ast_tvzero(tv)) {
01056             tv = ast_tv(30000, 0);
01057          }
01058          res = ast_select(n + 1, &rfds, NULL, &efds, &tv);
01059       } else {
01060          res = ast_select(n + 1, &rfds, NULL, &efds, NULL);
01061          tv = ast_tv(0,0);
01062          tonepos = 0;
01063       }
01064       /* Okay, select has finished.  Let's see what happened.  */
01065       if (res < 0) {
01066          ast_log(LOG_DEBUG, "select return %d: %s\n", res, strerror(errno));
01067          continue;
01068       }
01069       /* If there are no fd's changed, just continue, it's probably time
01070          to play some more dialtones */
01071       if (!res)
01072          continue;
01073       /* Alright, lock the interface list again, and let's look and see what has
01074          happened */
01075       if (ast_mutex_lock(&iflock)) {
01076          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01077          continue;
01078       }
01079 
01080       i = iflist;
01081       for(; i; i=i->next) {
01082          if (FD_ISSET(i->fd, &rfds)) {
01083             if (i->owner) {
01084                continue;
01085             }
01086             phone_mini_packet(i);
01087          }
01088          if (FD_ISSET(i->fd, &efds)) {
01089             if (i->owner) {
01090                continue;
01091             }
01092             phone_check_exception(i);
01093          }
01094       }
01095       ast_mutex_unlock(&iflock);
01096    }
01097    return NULL;
01098    
01099 }
01100 
01101 static int restart_monitor()
01102 {
01103    /* If we're supposed to be stopped -- stay stopped */
01104    if (monitor_thread == AST_PTHREADT_STOP)
01105       return 0;
01106    if (ast_mutex_lock(&monlock)) {
01107       ast_log(LOG_WARNING, "Unable to lock monitor\n");
01108       return -1;
01109    }
01110    if (monitor_thread == pthread_self()) {
01111       ast_mutex_unlock(&monlock);
01112       ast_log(LOG_WARNING, "Cannot kill myself\n");
01113       return -1;
01114    }
01115    if (monitor_thread != AST_PTHREADT_NULL) {
01116       if (ast_mutex_lock(&iflock)) {
01117          ast_mutex_unlock(&monlock);
01118          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01119          return -1;
01120       }
01121       monitor = 0;
01122       while (pthread_kill(monitor_thread, SIGURG) == 0)
01123          sched_yield();
01124       pthread_join(monitor_thread, NULL);
01125       ast_mutex_unlock(&iflock);
01126    }
01127    monitor = 1;
01128    /* Start a new monitor */
01129    if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
01130       ast_mutex_unlock(&monlock);
01131       ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
01132       return -1;
01133    }
01134    ast_mutex_unlock(&monlock);
01135    return 0;
01136 }
01137 
01138 static struct phone_pvt *mkif(char *iface, int mode, int txgain, int rxgain)
01139 {
01140    /* Make a phone_pvt structure for this interface */
01141    struct phone_pvt *tmp;
01142    int flags;  
01143    
01144    tmp = malloc(sizeof(struct phone_pvt));
01145    if (tmp) {
01146       tmp->fd = open(iface, O_RDWR);
01147       if (tmp->fd < 0) {
01148          ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);
01149          free(tmp);
01150          return NULL;
01151       }
01152       if (mode == MODE_FXO) {
01153          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_PSTN)) 
01154             ast_log(LOG_DEBUG, "Unable to set port to PSTN\n");
01155       } else {
01156          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_POTS)) 
01157              if (mode != MODE_FXS)
01158                   ast_log(LOG_DEBUG, "Unable to set port to POTS\n");
01159       }
01160       ioctl(tmp->fd, PHONE_PLAY_STOP);
01161       ioctl(tmp->fd, PHONE_REC_STOP);
01162       ioctl(tmp->fd, PHONE_RING_STOP);
01163       ioctl(tmp->fd, PHONE_CPT_STOP);
01164       if (ioctl(tmp->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK)) 
01165          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",iface, strerror(errno));
01166       if (echocancel != AEC_OFF)
01167          ioctl(tmp->fd, IXJCTL_AEC_START, echocancel);
01168       if (silencesupression) 
01169          tmp->silencesupression = 1;
01170 #ifdef PHONE_VAD
01171       ioctl(tmp->fd, PHONE_VAD, tmp->silencesupression);
01172 #endif
01173       tmp->mode = mode;
01174       flags = fcntl(tmp->fd, F_GETFL);
01175       fcntl(tmp->fd, F_SETFL, flags | O_NONBLOCK);
01176       tmp->owner = NULL;
01177       tmp->lastformat = -1;
01178       tmp->lastinput = -1;
01179       tmp->ministate = 0;
01180       memset(tmp->ext, 0, sizeof(tmp->ext));
01181       ast_copy_string(tmp->language, language, sizeof(tmp->language));
01182       ast_copy_string(tmp->dev, iface, sizeof(tmp->dev));
01183       ast_copy_string(tmp->context, context, sizeof(tmp->context));
01184       tmp->next = NULL;
01185       tmp->obuflen = 0;
01186       tmp->dialtone = 0;
01187       tmp->cpt = 0;
01188       ast_copy_string(tmp->cid_num, cid_num, sizeof(tmp->cid_num));
01189       ast_copy_string(tmp->cid_name, cid_name, sizeof(tmp->cid_name));
01190       tmp->txgain = txgain;
01191       ioctl(tmp->fd, PHONE_PLAY_VOLUME, tmp->txgain);
01192       tmp->rxgain = rxgain;
01193       ioctl(tmp->fd, PHONE_REC_VOLUME, tmp->rxgain);
01194    }
01195    return tmp;
01196 }
01197 
01198 static struct ast_channel *phone_request(const char *type, int format, void *data, int *cause)
01199 {
01200    int oldformat;
01201    struct phone_pvt *p;
01202    struct ast_channel *tmp = NULL;
01203    char *name = data;
01204 
01205    /* Search for an unowned channel */
01206    if (ast_mutex_lock(&iflock)) {
01207       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01208       return NULL;
01209    }
01210    p = iflist;
01211    while(p) {
01212       if (p->mode == MODE_FXS ||
01213           format & (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) {
01214           size_t length = strlen(p->dev + 5);
01215          if (strncmp(name, p->dev + 5, length) == 0 &&
01216              !isalnum(name[length])) {
01217              if (!p->owner) {
01218                      tmp = phone_new(p, AST_STATE_DOWN, p->context);
01219                      break;
01220                 } else
01221                      *cause = AST_CAUSE_BUSY;
01222             }
01223       }
01224       p = p->next;
01225    }
01226    ast_mutex_unlock(&iflock);
01227    restart_monitor();
01228    if (tmp == NULL) {
01229       oldformat = format;
01230       format &= (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW);
01231       if (!format) {
01232          ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
01233          return NULL;
01234       }
01235    }
01236    return tmp;
01237 }
01238 
01239 /* parse gain value from config file */
01240 static int parse_gain_value(char *gain_type, char *value)
01241 {
01242    float gain;
01243 
01244    /* try to scan number */
01245    if (sscanf(value, "%f", &gain) != 1)
01246    {
01247       ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n",
01248          value, gain_type, config);
01249       return DEFAULT_GAIN;
01250    }
01251 
01252    /* multiplicate gain by 1.0 gain value */ 
01253    gain = gain * (float)DEFAULT_GAIN;
01254 
01255    /* percentage? */
01256    if (value[strlen(value) - 1] == '%')
01257       return (int)(gain / (float)100);
01258 
01259    return (int)gain;
01260 }
01261 
01262 static int __unload_module(void)
01263 {
01264    struct phone_pvt *p, *pl;
01265    /* First, take us out of the channel loop */
01266    ast_channel_unregister(cur_tech);
01267    if (!ast_mutex_lock(&iflock)) {
01268       /* Hangup all interfaces if they have an owner */
01269       p = iflist;
01270       while(p) {
01271          if (p->owner)
01272             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
01273          p = p->next;
01274       }
01275       iflist = NULL;
01276       ast_mutex_unlock(&iflock);
01277    } else {
01278       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01279       return -1;
01280    }
01281    if (!ast_mutex_lock(&monlock)) {
01282       if (monitor_thread > AST_PTHREADT_NULL) {
01283          monitor = 0;
01284          while (pthread_kill(monitor_thread, SIGURG) == 0)
01285             sched_yield();
01286          pthread_join(monitor_thread, NULL);
01287       }
01288       monitor_thread = AST_PTHREADT_STOP;
01289       ast_mutex_unlock(&monlock);
01290    } else {
01291       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01292       return -1;
01293    }
01294 
01295    if (!ast_mutex_lock(&iflock)) {
01296       /* Destroy all the interfaces and free their memory */
01297       p = iflist;
01298       while(p) {
01299          /* Close the socket, assuming it's real */
01300          if (p->fd > -1)
01301             close(p->fd);
01302          pl = p;
01303          p = p->next;
01304          /* Free associated memory */
01305          free(pl);
01306       }
01307       iflist = NULL;
01308       ast_mutex_unlock(&iflock);
01309    } else {
01310       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01311       return -1;
01312    }
01313       
01314    return 0;
01315 }
01316 
01317 static int unload_module(void)
01318 {
01319    return __unload_module();
01320 }
01321 
01322 static int load_module(void)
01323 {
01324    struct ast_config *cfg;
01325    struct ast_variable *v;
01326    struct phone_pvt *tmp;
01327    int mode = MODE_IMMEDIATE;
01328    int txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; /* default gain 1.0 */
01329    cfg = ast_config_load(config);
01330 
01331    /* We *must* have a config file otherwise stop immediately */
01332    if (!cfg) {
01333       ast_log(LOG_ERROR, "Unable to load config %s\n", config);
01334       return AST_MODULE_LOAD_DECLINE;
01335    }
01336    if (ast_mutex_lock(&iflock)) {
01337       /* It's a little silly to lock it, but we mind as well just to be sure */
01338       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01339       return -1;
01340    }
01341    v = ast_variable_browse(cfg, "interfaces");
01342    while(v) {
01343       /* Create the interface list */
01344       if (!strcasecmp(v->name, "device")) {
01345             tmp = mkif(v->value, mode, txgain, rxgain);
01346             if (tmp) {
01347                tmp->next = iflist;
01348                iflist = tmp;
01349                
01350             } else {
01351                ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
01352                ast_config_destroy(cfg);
01353                ast_mutex_unlock(&iflock);
01354                __unload_module();
01355                return -1;
01356             }
01357       } else if (!strcasecmp(v->name, "silencesupression")) {
01358          silencesupression = ast_true(v->value);
01359       } else if (!strcasecmp(v->name, "language")) {
01360          ast_copy_string(language, v->value, sizeof(language));
01361       } else if (!strcasecmp(v->name, "callerid")) {
01362          ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
01363       } else if (!strcasecmp(v->name, "mode")) {
01364          if (!strncasecmp(v->value, "di", 2)) 
01365             mode = MODE_DIALTONE;
01366          else if (!strncasecmp(v->value, "sig", 3))
01367             mode = MODE_SIGMA;
01368          else if (!strncasecmp(v->value, "im", 2))
01369             mode = MODE_IMMEDIATE;
01370          else if (!strncasecmp(v->value, "fxs", 3)) {
01371             mode = MODE_FXS;
01372             prefformat = 0x01ff0000; /* All non-voice */
01373          }
01374          else if (!strncasecmp(v->value, "fx", 2))
01375             mode = MODE_FXO;
01376          else
01377             ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
01378       } else if (!strcasecmp(v->name, "context")) {
01379          ast_copy_string(context, v->value, sizeof(context));
01380       } else if (!strcasecmp(v->name, "format")) {
01381          if (!strcasecmp(v->value, "g723.1")) {
01382             prefformat = AST_FORMAT_G723_1;
01383          } else if (!strcasecmp(v->value, "slinear")) {
01384             if (mode == MODE_FXS)
01385                 prefformat |= AST_FORMAT_SLINEAR;
01386             else prefformat = AST_FORMAT_SLINEAR;
01387          } else if (!strcasecmp(v->value, "ulaw")) {
01388             prefformat = AST_FORMAT_ULAW;
01389          } else
01390             ast_log(LOG_WARNING, "Unknown format '%s'\n", v->value);
01391       } else if (!strcasecmp(v->name, "echocancel")) {
01392          if (!strcasecmp(v->value, "off")) {
01393             echocancel = AEC_OFF;
01394          } else if (!strcasecmp(v->value, "low")) {
01395             echocancel = AEC_LOW;
01396          } else if (!strcasecmp(v->value, "medium")) {
01397             echocancel = AEC_MED;
01398          } else if (!strcasecmp(v->value, "high")) {
01399             echocancel = AEC_HIGH;
01400          } else 
01401             ast_log(LOG_WARNING, "Unknown echo cancellation '%s'\n", v->value);
01402       } else if (!strcasecmp(v->name, "txgain")) {
01403          txgain = parse_gain_value(v->name, v->value);
01404       } else if (!strcasecmp(v->name, "rxgain")) {
01405          rxgain = parse_gain_value(v->name, v->value);
01406       }  
01407       v = v->next;
01408    }
01409    ast_mutex_unlock(&iflock);
01410 
01411    if (mode == MODE_FXS) {
01412       phone_tech_fxs.capabilities = prefformat;
01413       cur_tech = &phone_tech_fxs;
01414    } else
01415       cur_tech = (struct ast_channel_tech *) &phone_tech;
01416 
01417    /* Make sure we can register our Adtranphone channel type */
01418 
01419    if (ast_channel_register(cur_tech)) {
01420       ast_log(LOG_ERROR, "Unable to register channel class 'Phone'\n");
01421       ast_config_destroy(cfg);
01422       __unload_module();
01423       return -1;
01424    }
01425    ast_config_destroy(cfg);
01426    /* And start the monitor for the first time */
01427    restart_monitor();
01428    return 0;
01429 }
01430 
01431 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Linux Telephony API Support");

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