Thu Dec 17 13:33:32 2009

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: 211528 $")
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    case AST_CONTROL_SRCUPDATE:
00230       res = 0;
00231       break;
00232    default:
00233       ast_log(LOG_WARNING, "Condition %d is not supported on channel %s\n", condition, chan->name);
00234    }
00235    return res;
00236 }
00237 
00238 static int phone_fixup(struct ast_channel *old, struct ast_channel *new)
00239 {
00240    struct phone_pvt *pvt = old->tech_pvt;
00241    if (pvt && pvt->owner == old)
00242       pvt->owner = new;
00243    return 0;
00244 }
00245 
00246 static int phone_digit_begin(struct ast_channel *chan, char digit)
00247 {
00248    /* XXX Modify this callback to let Asterisk support controlling the length of DTMF */
00249    return 0;
00250 }
00251 
00252 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
00253 {
00254    struct phone_pvt *p;
00255    int outdigit;
00256    p = ast->tech_pvt;
00257    ast_log(LOG_DEBUG, "Dialed %c\n", digit);
00258    switch(digit) {
00259    case '0':
00260    case '1':
00261    case '2':
00262    case '3':
00263    case '4':
00264    case '5':
00265    case '6':
00266    case '7':
00267    case '8':
00268    case '9':
00269       outdigit = digit - '0';
00270       break;
00271    case '*':
00272       outdigit = 11;
00273       break;
00274    case '#':
00275       outdigit = 12;
00276       break;
00277    case 'f':   /*flash*/
00278    case 'F':
00279       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00280       usleep(320000);
00281       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00282       p->lastformat = -1;
00283       return 0;
00284    default:
00285       ast_log(LOG_WARNING, "Unknown digit '%c'\n", digit);
00286       return -1;
00287    }
00288    ast_log(LOG_DEBUG, "Dialed %d\n", outdigit);
00289    ioctl(p->fd, PHONE_PLAY_TONE, outdigit);
00290    p->lastformat = -1;
00291    return 0;
00292 }
00293 
00294 static int phone_call(struct ast_channel *ast, char *dest, int timeout)
00295 {
00296    struct phone_pvt *p;
00297 
00298    PHONE_CID cid;
00299    time_t UtcTime;
00300    struct tm tm;
00301    int start;
00302 
00303    time(&UtcTime);
00304    ast_localtime(&UtcTime, &tm, NULL);
00305 
00306    memset(&cid, 0, sizeof(PHONE_CID));
00307    if(&tm != NULL) {
00308       snprintf(cid.month, sizeof(cid.month), "%02d",(tm.tm_mon + 1));
00309       snprintf(cid.day, sizeof(cid.day),     "%02d", tm.tm_mday);
00310       snprintf(cid.hour, sizeof(cid.hour),   "%02d", tm.tm_hour);
00311       snprintf(cid.min, sizeof(cid.min),     "%02d", tm.tm_min);
00312    }
00313    /* the standard format of ast->callerid is:  "name" <number>, but not always complete */
00314    if (ast_strlen_zero(ast->cid.cid_name))
00315       strcpy(cid.name, DEFAULT_CALLER_ID);
00316    else
00317       ast_copy_string(cid.name, ast->cid.cid_name, sizeof(cid.name));
00318 
00319    if (ast->cid.cid_num) 
00320       ast_copy_string(cid.number, ast->cid.cid_num, sizeof(cid.number));
00321 
00322    p = ast->tech_pvt;
00323 
00324    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
00325       ast_log(LOG_WARNING, "phone_call called on %s, neither down nor reserved\n", ast->name);
00326       return -1;
00327    }
00328    if (option_debug)
00329       ast_log(LOG_DEBUG, "Ringing %s on %s (%d)\n", dest, ast->name, ast->fds[0]);
00330 
00331    start = IXJ_PHONE_RING_START(cid);
00332    if (start == -1)
00333       return -1;
00334    
00335    if (p->mode == MODE_FXS) {
00336       char *digit = strchr(dest, '/');
00337       if (digit)
00338       {
00339         digit++;
00340         while (*digit)
00341           phone_digit_end(ast, *digit++, 0);
00342       }
00343    }
00344  
00345    ast_setstate(ast, AST_STATE_RINGING);
00346    ast_queue_control(ast, AST_CONTROL_RINGING);
00347    return 0;
00348 }
00349 
00350 static int phone_hangup(struct ast_channel *ast)
00351 {
00352    struct phone_pvt *p;
00353    p = ast->tech_pvt;
00354    if (option_debug)
00355       ast_log(LOG_DEBUG, "phone_hangup(%s)\n", ast->name);
00356    if (!ast->tech_pvt) {
00357       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00358       return 0;
00359    }
00360    /* XXX Is there anything we can do to really hang up except stop recording? */
00361    ast_setstate(ast, AST_STATE_DOWN);
00362    if (ioctl(p->fd, PHONE_REC_STOP))
00363       ast_log(LOG_WARNING, "Failed to stop recording\n");
00364    if (ioctl(p->fd, PHONE_PLAY_STOP))
00365       ast_log(LOG_WARNING, "Failed to stop playing\n");
00366    if (ioctl(p->fd, PHONE_RING_STOP))
00367       ast_log(LOG_WARNING, "Failed to stop ringing\n");
00368    if (ioctl(p->fd, PHONE_CPT_STOP))
00369       ast_log(LOG_WARNING, "Failed to stop sounds\n");
00370 
00371    /* If it's an FXO, hang them up */
00372    if (p->mode == MODE_FXO) {
00373       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK)) 
00374          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",ast->name, strerror(errno));
00375    }
00376 
00377    /* If they're off hook, give a busy signal */
00378    if (ioctl(p->fd, PHONE_HOOKSTATE)) {
00379       if (option_debug)
00380          ast_log(LOG_DEBUG, "Got hunghup, giving busy signal\n");
00381       ioctl(p->fd, PHONE_BUSY);
00382       p->cpt = 1;
00383    }
00384    p->lastformat = -1;
00385    p->lastinput = -1;
00386    p->ministate = 0;
00387    p->obuflen = 0;
00388    p->dialtone = 0;
00389    memset(p->ext, 0, sizeof(p->ext));
00390    ((struct phone_pvt *)(ast->tech_pvt))->owner = NULL;
00391    ast_module_unref(ast_module_info->self);
00392    if (option_verbose > 2) 
00393       ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", ast->name);
00394    ast->tech_pvt = NULL;
00395    ast_setstate(ast, AST_STATE_DOWN);
00396    restart_monitor();
00397    return 0;
00398 }
00399 
00400 static int phone_setup(struct ast_channel *ast)
00401 {
00402    struct phone_pvt *p;
00403    p = ast->tech_pvt;
00404    ioctl(p->fd, PHONE_CPT_STOP);
00405    /* Nothing to answering really, just start recording */
00406    if (ast->rawreadformat == AST_FORMAT_G723_1) {
00407       /* Prefer g723 */
00408       ioctl(p->fd, PHONE_REC_STOP);
00409       if (p->lastinput != AST_FORMAT_G723_1) {
00410          p->lastinput = AST_FORMAT_G723_1;
00411          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00412             ast_log(LOG_WARNING, "Failed to set codec to g723.1\n");
00413             return -1;
00414          }
00415       }
00416    } else if (ast->rawreadformat == AST_FORMAT_SLINEAR) {
00417       ioctl(p->fd, PHONE_REC_STOP);
00418       if (p->lastinput != AST_FORMAT_SLINEAR) {
00419          p->lastinput = AST_FORMAT_SLINEAR;
00420          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00421             ast_log(LOG_WARNING, "Failed to set codec to signed linear 16\n");
00422             return -1;
00423          }
00424       }
00425    } else if (ast->rawreadformat == AST_FORMAT_ULAW) {
00426       ioctl(p->fd, PHONE_REC_STOP);
00427       if (p->lastinput != AST_FORMAT_ULAW) {
00428          p->lastinput = AST_FORMAT_ULAW;
00429          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00430             ast_log(LOG_WARNING, "Failed to set codec to uLaw\n");
00431             return -1;
00432          }
00433       }
00434    } else if (p->mode == MODE_FXS) {
00435       ioctl(p->fd, PHONE_REC_STOP);
00436       if (p->lastinput != ast->rawreadformat) {
00437          p->lastinput = ast->rawreadformat;
00438          if (ioctl(p->fd, PHONE_REC_CODEC, ast->rawreadformat)) {
00439             ast_log(LOG_WARNING, "Failed to set codec to %d\n", 
00440                ast->rawreadformat);
00441             return -1;
00442          }
00443       }
00444    } else {
00445       ast_log(LOG_WARNING, "Can't do format %s\n", ast_getformatname(ast->rawreadformat));
00446       return -1;
00447    }
00448    if (ioctl(p->fd, PHONE_REC_START)) {
00449       ast_log(LOG_WARNING, "Failed to start recording\n");
00450       return -1;
00451    }
00452    /* set the DTMF times (the default is too short) */
00453    ioctl(p->fd, PHONE_SET_TONE_ON_TIME, 300);
00454    ioctl(p->fd, PHONE_SET_TONE_OFF_TIME, 200);
00455    return 0;
00456 }
00457 
00458 static int phone_answer(struct ast_channel *ast)
00459 {
00460    struct phone_pvt *p;
00461    p = ast->tech_pvt;
00462    /* In case it's a LineJack, take it off hook */
00463    if (p->mode == MODE_FXO) {
00464       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_OFF_HOOK)) 
00465          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n", ast->name, strerror(errno));
00466       else
00467          ast_log(LOG_DEBUG, "Took linejack off hook\n");
00468    }
00469    phone_setup(ast);
00470    if (option_debug)
00471       ast_log(LOG_DEBUG, "phone_answer(%s)\n", ast->name);
00472    ast->rings = 0;
00473    ast_setstate(ast, AST_STATE_UP);
00474    return 0;
00475 }
00476 
00477 #if 0
00478 static char phone_2digit(char c)
00479 {
00480    if (c == 12)
00481       return '#';
00482    else if (c == 11)
00483       return '*';
00484    else if ((c < 10) && (c >= 0))
00485       return '0' + c - 1;
00486    else
00487       return '?';
00488 }
00489 #endif
00490 
00491 static struct ast_frame  *phone_exception(struct ast_channel *ast)
00492 {
00493    int res;
00494    union telephony_exception phonee;
00495    struct phone_pvt *p = ast->tech_pvt;
00496    char digit;
00497 
00498    /* Some nice norms */
00499    p->fr.datalen = 0;
00500    p->fr.samples = 0;
00501    p->fr.data =  NULL;
00502    p->fr.src = "Phone";
00503    p->fr.offset = 0;
00504    p->fr.mallocd=0;
00505    p->fr.delivery = ast_tv(0,0);
00506    
00507    phonee.bytes = ioctl(p->fd, PHONE_EXCEPTION);
00508    if (phonee.bits.dtmf_ready)  {
00509       if (option_debug)
00510          ast_log(LOG_DEBUG, "phone_exception(): DTMF\n");
00511    
00512       /* We've got a digit -- Just handle this nicely and easily */
00513       digit =  ioctl(p->fd, PHONE_GET_DTMF_ASCII);
00514       p->fr.subclass = digit;
00515       p->fr.frametype = AST_FRAME_DTMF;
00516       return &p->fr;
00517    }
00518    if (phonee.bits.hookstate) {
00519       if (option_debug)
00520          ast_log(LOG_DEBUG, "Hookstate changed\n");
00521       res = ioctl(p->fd, PHONE_HOOKSTATE);
00522       /* See if we've gone on hook, if so, notify by returning NULL */
00523       if (option_debug)
00524          ast_log(LOG_DEBUG, "New hookstate: %d\n", res);
00525       if (!res && (p->mode != MODE_FXO))
00526          return NULL;
00527       else {
00528          if (ast->_state == AST_STATE_RINGING) {
00529             /* They've picked up the phone */
00530             p->fr.frametype = AST_FRAME_CONTROL;
00531             p->fr.subclass = AST_CONTROL_ANSWER;
00532             phone_setup(ast);
00533             ast_setstate(ast, AST_STATE_UP);
00534             return &p->fr;
00535          }  else 
00536             ast_log(LOG_WARNING, "Got off hook in weird state %d\n", ast->_state);
00537       }
00538    }
00539 #if 1
00540    if (phonee.bits.pstn_ring)
00541       ast_verbose("Unit is ringing\n");
00542    if (phonee.bits.caller_id) {
00543       ast_verbose("We have caller ID\n");
00544    }
00545    if (phonee.bits.pstn_wink)
00546       ast_verbose("Detected Wink\n");
00547 #endif
00548    /* Strange -- nothing there.. */
00549    p->fr.frametype = AST_FRAME_NULL;
00550    p->fr.subclass = 0;
00551    return &p->fr;
00552 }
00553 
00554 static struct ast_frame  *phone_read(struct ast_channel *ast)
00555 {
00556    int res;
00557    struct phone_pvt *p = ast->tech_pvt;
00558    
00559 
00560    /* Some nice norms */
00561    p->fr.datalen = 0;
00562    p->fr.samples = 0;
00563    p->fr.data =  NULL;
00564    p->fr.src = "Phone";
00565    p->fr.offset = 0;
00566    p->fr.mallocd=0;
00567    p->fr.delivery = ast_tv(0,0);
00568 
00569    /* Try to read some data... */
00570    CHECK_BLOCKING(ast);
00571    res = read(p->fd, p->buf, PHONE_MAX_BUF);
00572    ast_clear_flag(ast, AST_FLAG_BLOCKING);
00573    if (res < 0) {
00574 #if 0
00575       if (errno == EAGAIN) {
00576          ast_log(LOG_WARNING, "Null frame received\n");
00577          p->fr.frametype = AST_FRAME_NULL;
00578          p->fr.subclass = 0;
00579          return &p->fr;
00580       }
00581 #endif
00582       ast_log(LOG_WARNING, "Error reading: %s\n", strerror(errno));
00583       return NULL;
00584    }
00585    p->fr.data = p->buf;
00586    if (p->mode != MODE_FXS)
00587    switch(p->buf[0] & 0x3) {
00588    case '0':
00589    case '1':
00590       /* Normal */
00591       break;
00592    case '2':
00593    case '3':
00594       /* VAD/CNG, only send two words */
00595       res = 4;
00596       break;
00597    }
00598    p->fr.samples = 240;
00599    p->fr.datalen = res;
00600    p->fr.frametype = p->lastinput <= AST_FORMAT_MAX_AUDIO ?
00601                           AST_FRAME_VOICE : 
00602            p->lastinput <= AST_FORMAT_PNG ? AST_FRAME_IMAGE 
00603            : AST_FRAME_VIDEO;
00604    p->fr.subclass = p->lastinput;
00605    p->fr.offset = AST_FRIENDLY_OFFSET;
00606    /* Byteswap from little-endian to native-endian */
00607    if (p->fr.subclass == AST_FORMAT_SLINEAR)
00608       ast_frame_byteswap_le(&p->fr);
00609    return &p->fr;
00610 }
00611 
00612 static int phone_write_buf(struct phone_pvt *p, const char *buf, int len, int frlen, int swap)
00613 {
00614    int res;
00615    /* Store as much of the buffer as we can, then write fixed frames */
00616    int space = sizeof(p->obuf) - p->obuflen;
00617    /* Make sure we have enough buffer space to store the frame */
00618    if (space < len)
00619       len = space;
00620    if (swap)
00621       ast_swapcopy_samples(p->obuf+p->obuflen, buf, len/2);
00622    else
00623       memcpy(p->obuf + p->obuflen, buf, len);
00624    p->obuflen += len;
00625    while(p->obuflen > frlen) {
00626       res = write(p->fd, p->obuf, frlen);
00627       if (res != frlen) {
00628          if (res < 1) {
00629 /*
00630  * Card is in non-blocking mode now and it works well now, but there are
00631  * lot of messages like this. So, this message is temporarily disabled.
00632  */
00633             return 0;
00634          } else {
00635             ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frlen);
00636          }
00637       }
00638       p->obuflen -= frlen;
00639       /* Move memory if necessary */
00640       if (p->obuflen) 
00641          memmove(p->obuf, p->obuf + frlen, p->obuflen);
00642    }
00643    return len;
00644 }
00645 
00646 static int phone_send_text(struct ast_channel *ast, const char *text)
00647 {
00648     int length = strlen(text);
00649     return phone_write_buf(ast->tech_pvt, text, length, length, 0) == 
00650            length ? 0 : -1;
00651 }
00652 
00653 static int phone_write(struct ast_channel *ast, struct ast_frame *frame)
00654 {
00655    struct phone_pvt *p = ast->tech_pvt;
00656    int res;
00657    int maxfr=0;
00658    char *pos;
00659    int sofar;
00660    int expected;
00661    int codecset = 0;
00662    char tmpbuf[4];
00663    /* Write a frame of (presumably voice) data */
00664    if (frame->frametype != AST_FRAME_VOICE && p->mode != MODE_FXS) {
00665       if (frame->frametype != AST_FRAME_IMAGE)
00666          ast_log(LOG_WARNING, "Don't know what to do with  frame type '%d'\n", frame->frametype);
00667       return 0;
00668    }
00669    if (!(frame->subclass &
00670       (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) && 
00671        p->mode != MODE_FXS) {
00672       ast_log(LOG_WARNING, "Cannot handle frames in %d format\n", frame->subclass);
00673       return -1;
00674    }
00675 #if 0
00676    /* If we're not in up mode, go into up mode now */
00677    if (ast->_state != AST_STATE_UP) {
00678       ast_setstate(ast, AST_STATE_UP);
00679       phone_setup(ast);
00680    }
00681 #else
00682    if (ast->_state != AST_STATE_UP) {
00683       /* Don't try tos end audio on-hook */
00684       return 0;
00685    }
00686 #endif   
00687    if (frame->subclass == AST_FORMAT_G723_1) {
00688       if (p->lastformat != AST_FORMAT_G723_1) {
00689          ioctl(p->fd, PHONE_PLAY_STOP);
00690          ioctl(p->fd, PHONE_REC_STOP);
00691          if (ioctl(p->fd, PHONE_PLAY_CODEC, G723_63)) {
00692             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00693             return -1;
00694          }
00695          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00696             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00697             return -1;
00698          }
00699          p->lastformat = AST_FORMAT_G723_1;
00700          p->lastinput = AST_FORMAT_G723_1;
00701          /* Reset output buffer */
00702          p->obuflen = 0;
00703          codecset = 1;
00704       }
00705       if (frame->datalen > 24) {
00706          ast_log(LOG_WARNING, "Frame size too large for G.723.1 (%d bytes)\n", frame->datalen);
00707          return -1;
00708       }
00709       maxfr = 24;
00710    } else if (frame->subclass == AST_FORMAT_SLINEAR) {
00711       if (p->lastformat != AST_FORMAT_SLINEAR) {
00712          ioctl(p->fd, PHONE_PLAY_STOP);
00713          ioctl(p->fd, PHONE_REC_STOP);
00714          if (ioctl(p->fd, PHONE_PLAY_CODEC, LINEAR16)) {
00715             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00716             return -1;
00717          }
00718          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00719             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00720             return -1;
00721          }
00722          p->lastformat = AST_FORMAT_SLINEAR;
00723          p->lastinput = AST_FORMAT_SLINEAR;
00724          codecset = 1;
00725          /* Reset output buffer */
00726          p->obuflen = 0;
00727       }
00728       maxfr = 480;
00729    } else if (frame->subclass == AST_FORMAT_ULAW) {
00730       if (p->lastformat != AST_FORMAT_ULAW) {
00731          ioctl(p->fd, PHONE_PLAY_STOP);
00732          ioctl(p->fd, PHONE_REC_STOP);
00733          if (ioctl(p->fd, PHONE_PLAY_CODEC, ULAW)) {
00734             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00735             return -1;
00736          }
00737          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00738             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00739             return -1;
00740          }
00741          p->lastformat = AST_FORMAT_ULAW;
00742          p->lastinput = AST_FORMAT_ULAW;
00743          codecset = 1;
00744          /* Reset output buffer */
00745          p->obuflen = 0;
00746       }
00747       maxfr = 240;
00748    } else {
00749       if (p->lastformat != frame->subclass) {
00750          ioctl(p->fd, PHONE_PLAY_STOP);
00751          ioctl(p->fd, PHONE_REC_STOP);
00752          if (ioctl(p->fd, PHONE_PLAY_CODEC, frame->subclass)) {
00753             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00754                frame->subclass);
00755             return -1;
00756          }
00757          if (ioctl(p->fd, PHONE_REC_CODEC, frame->subclass)) {
00758             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00759                frame->subclass);
00760             return -1;
00761          }
00762          p->lastformat = frame->subclass;
00763          p->lastinput = frame->subclass;
00764          codecset = 1;
00765          /* Reset output buffer */
00766          p->obuflen = 0;
00767       }
00768       maxfr = 480;
00769    }
00770    if (codecset) {
00771       ioctl(p->fd, PHONE_REC_DEPTH, 3);
00772       ioctl(p->fd, PHONE_PLAY_DEPTH, 3);
00773       if (ioctl(p->fd, PHONE_PLAY_START)) {
00774          ast_log(LOG_WARNING, "Failed to start playback\n");
00775          return -1;
00776       }
00777       if (ioctl(p->fd, PHONE_REC_START)) {
00778          ast_log(LOG_WARNING, "Failed to start recording\n");
00779          return -1;
00780       }
00781    }
00782    /* If we get here, we have a frame of Appropriate data */
00783    sofar = 0;
00784    pos = frame->data;
00785    while(sofar < frame->datalen) {
00786       /* Write in no more than maxfr sized frames */
00787       expected = frame->datalen - sofar;
00788       if (maxfr < expected)
00789          expected = maxfr;
00790       /* XXX Internet Phone Jack does not handle the 4-byte VAD frame properly! XXX 
00791          we have to pad it to 24 bytes still.  */
00792       if (frame->datalen == 4) {
00793          if (p->silencesupression) {
00794             memset(tmpbuf, 0, sizeof(tmpbuf));
00795             memcpy(tmpbuf, frame->data, 4);
00796             expected = 24;
00797             res = phone_write_buf(p, tmpbuf, expected, maxfr, 0);
00798          }
00799          res = 4;
00800          expected=4;
00801       } else {
00802          int swap = 0;
00803 #if __BYTE_ORDER == __BIG_ENDIAN
00804          if (frame->subclass == AST_FORMAT_SLINEAR)
00805             swap = 1; /* Swap big-endian samples to little-endian as we copy */
00806 #endif
00807          res = phone_write_buf(p, pos, expected, maxfr, swap);
00808       }
00809       if (res != expected) {
00810          if ((errno != EAGAIN) && (errno != EINTR)) {
00811             if (res < 0) 
00812                ast_log(LOG_WARNING, "Write returned error (%s)\n", strerror(errno));
00813    /*
00814     * Card is in non-blocking mode now and it works well now, but there are
00815     * lot of messages like this. So, this message is temporarily disabled.
00816     */
00817 #if 0
00818             else
00819                ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frame->datalen);
00820 #endif
00821             return -1;
00822          } else /* Pretend it worked */
00823             res = expected;
00824       }
00825       sofar += res;
00826       pos += res;
00827    }
00828    return 0;
00829 }
00830 
00831 static struct ast_channel *phone_new(struct phone_pvt *i, int state, char *context)
00832 {
00833    struct ast_channel *tmp;
00834    struct phone_codec_data codec;
00835    tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "", i->ext, i->context, 0, "Phone/%s", i->dev + 5);
00836    if (tmp) {
00837       tmp->tech = cur_tech;
00838       tmp->fds[0] = i->fd;
00839       /* XXX Switching formats silently causes kernel panics XXX */
00840       if (i->mode == MODE_FXS &&
00841           ioctl(i->fd, PHONE_QUERY_CODEC, &codec) == 0) {
00842          if (codec.type == LINEAR16)
00843             tmp->nativeformats =
00844             tmp->rawreadformat =
00845             tmp->rawwriteformat =
00846             AST_FORMAT_SLINEAR;
00847          else {
00848             tmp->nativeformats =
00849             tmp->rawreadformat =
00850             tmp->rawwriteformat =
00851             prefformat & ~AST_FORMAT_SLINEAR;
00852          }
00853       }
00854       else {
00855          tmp->nativeformats = prefformat;
00856          tmp->rawreadformat = prefformat;
00857          tmp->rawwriteformat = prefformat;
00858       }
00859       /* no need to call ast_setstate: the channel_alloc already did its job */
00860       if (state == AST_STATE_RING)
00861          tmp->rings = 1;
00862       tmp->tech_pvt = i;
00863       ast_copy_string(tmp->context, context, sizeof(tmp->context));
00864       if (!ast_strlen_zero(i->ext))
00865          ast_copy_string(tmp->exten, i->ext, sizeof(tmp->exten));
00866       else
00867          strcpy(tmp->exten, "s");
00868       if (!ast_strlen_zero(i->language))
00869          ast_string_field_set(tmp, language, i->language);
00870 
00871       /* Don't use ast_set_callerid() here because it will
00872        * generate a NewCallerID event before the NewChannel event */
00873       tmp->cid.cid_ani = ast_strdup(i->cid_num);
00874 
00875       i->owner = tmp;
00876       ast_module_ref(ast_module_info->self);
00877       if (state != AST_STATE_DOWN) {
00878          if (state == AST_STATE_RING) {
00879             ioctl(tmp->fds[0], PHONE_RINGBACK);
00880             i->cpt = 1;
00881          }
00882          if (ast_pbx_start(tmp)) {
00883             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00884             ast_hangup(tmp);
00885          }
00886       }
00887    } else
00888       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
00889    return tmp;
00890 }
00891 
00892 static void phone_mini_packet(struct phone_pvt *i)
00893 {
00894    int res;
00895    char buf[1024];
00896    /* Ignore stuff we read... */
00897    res = read(i->fd, buf, sizeof(buf));
00898    if (res < 1) {
00899       ast_log(LOG_WARNING, "Read returned %d: %s\n", res, strerror(errno));
00900       return;
00901    }
00902 }
00903 
00904 static void phone_check_exception(struct phone_pvt *i)
00905 {
00906    int offhook=0;
00907    char digit[2] = {0 , 0};
00908    union telephony_exception phonee;
00909    /* XXX Do something XXX */
00910 #if 0
00911    ast_log(LOG_DEBUG, "Exception!\n");
00912 #endif
00913    phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION);
00914    if (phonee.bits.dtmf_ready)  {
00915       digit[0] = ioctl(i->fd, PHONE_GET_DTMF_ASCII);
00916       if (i->mode == MODE_DIALTONE || i->mode == MODE_FXS || i->mode == MODE_SIGMA) {
00917          ioctl(i->fd, PHONE_PLAY_STOP);
00918          ioctl(i->fd, PHONE_REC_STOP);
00919          ioctl(i->fd, PHONE_CPT_STOP);
00920          i->dialtone = 0;
00921          if (strlen(i->ext) < AST_MAX_EXTENSION - 1)
00922             strncat(i->ext, digit, sizeof(i->ext) - strlen(i->ext) - 1);
00923          if ((i->mode != MODE_FXS ||
00924               !(phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION)) ||
00925               !phonee.bits.dtmf_ready) &&
00926              ast_exists_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00927             /* It's a valid extension in its context, get moving! */
00928             phone_new(i, AST_STATE_RING, i->context);
00929             /* No need to restart monitor, we are the monitor */
00930          } else if (!ast_canmatch_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00931             /* There is nothing in the specified extension that can match anymore.
00932                Try the default */
00933             if (ast_exists_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00934                /* Check the default, too... */
00935                phone_new(i, AST_STATE_RING, "default");
00936                /* XXX This should probably be justified better XXX */
00937             }  else if (!ast_canmatch_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00938                /* It's not a valid extension, give a busy signal */
00939                if (option_debug)
00940                   ast_log(LOG_DEBUG, "%s can't match anything in %s or default\n", i->ext, i->context);
00941                ioctl(i->fd, PHONE_BUSY);
00942                i->cpt = 1;
00943             }
00944          }
00945 #if 0
00946          ast_verbose("Extension is %s\n", i->ext);
00947 #endif
00948       }
00949    }
00950    if (phonee.bits.hookstate) {
00951       offhook = ioctl(i->fd, PHONE_HOOKSTATE);
00952       if (offhook) {
00953          if (i->mode == MODE_IMMEDIATE) {
00954             phone_new(i, AST_STATE_RING, i->context);
00955          } else if (i->mode == MODE_DIALTONE) {
00956             ast_module_ref(ast_module_info->self);
00957             /* Reset the extension */
00958             i->ext[0] = '\0';
00959             /* Play the dialtone */
00960             i->dialtone++;
00961             ioctl(i->fd, PHONE_PLAY_STOP);
00962             ioctl(i->fd, PHONE_PLAY_CODEC, ULAW);
00963             ioctl(i->fd, PHONE_PLAY_START);
00964             i->lastformat = -1;
00965          } else if (i->mode == MODE_SIGMA) {
00966             ast_module_ref(ast_module_info->self);
00967             /* Reset the extension */
00968             i->ext[0] = '\0';
00969             /* Play the dialtone */
00970             i->dialtone++;
00971             ioctl(i->fd, PHONE_DIALTONE);
00972          }
00973       } else {
00974          if (i->dialtone)
00975             ast_module_unref(ast_module_info->self);
00976          memset(i->ext, 0, sizeof(i->ext));
00977          if (i->cpt)
00978          {
00979             ioctl(i->fd, PHONE_CPT_STOP);
00980             i->cpt = 0;
00981          }
00982          ioctl(i->fd, PHONE_PLAY_STOP);
00983          ioctl(i->fd, PHONE_REC_STOP);
00984          i->dialtone = 0;
00985          i->lastformat = -1;
00986       }
00987    }
00988    if (phonee.bits.pstn_ring) {
00989       ast_verbose("Unit is ringing\n");
00990       phone_new(i, AST_STATE_RING, i->context);
00991    }
00992    if (phonee.bits.caller_id)
00993       ast_verbose("We have caller ID\n");
00994    
00995    
00996 }
00997 
00998 static void *do_monitor(void *data)
00999 {
01000    fd_set rfds, efds;
01001    int n, res;
01002    struct phone_pvt *i;
01003    int tonepos = 0;
01004    /* The tone we're playing this round */
01005    struct timeval tv = {0,0};
01006    int dotone;
01007    /* This thread monitors all the frame relay interfaces which are not yet in use
01008       (and thus do not have a separate thread) indefinitely */
01009    while (monitor) {
01010       /* Don't let anybody kill us right away.  Nobody should lock the interface list
01011          and wait for the monitor list, but the other way around is okay. */
01012       /* Lock the interface list */
01013       if (ast_mutex_lock(&iflock)) {
01014          ast_log(LOG_ERROR, "Unable to grab interface lock\n");
01015          return NULL;
01016       }
01017       /* Build the stuff we're going to select on, that is the socket of every
01018          phone_pvt that does not have an associated owner channel */
01019       n = -1;
01020       FD_ZERO(&rfds);
01021       FD_ZERO(&efds);
01022       i = iflist;
01023       dotone = 0;
01024       while (i) {
01025          if (FD_ISSET(i->fd, &rfds)) 
01026             ast_log(LOG_WARNING, "Descriptor %d appears twice (%s)?\n", i->fd, i->dev);
01027          if (!i->owner) {
01028             /* This needs to be watched, as it lacks an owner */
01029             FD_SET(i->fd, &rfds);
01030             FD_SET(i->fd, &efds);
01031             if (i->fd > n)
01032                n = i->fd;
01033             if (i->dialtone && i->mode != MODE_SIGMA) {
01034                /* Remember we're going to have to come back and play
01035                   more dialtones */
01036                if (ast_tvzero(tv)) {
01037                   /* If we're due for a dialtone, play one */
01038                   if (write(i->fd, DialTone + tonepos, 240) != 240)
01039                      ast_log(LOG_WARNING, "Dial tone write error\n");
01040                }
01041                dotone++;
01042             }
01043          }
01044          
01045          i = i->next;
01046       }
01047       /* Okay, now that we know what to do, release the interface lock */
01048       ast_mutex_unlock(&iflock);
01049 
01050       /* Wait indefinitely for something to happen */
01051       if (dotone && i && i->mode != MODE_SIGMA) {
01052          /* If we're ready to recycle the time, set it to 30 ms */
01053          tonepos += 240;
01054          if (tonepos >= sizeof(DialTone))
01055                tonepos = 0;
01056          if (ast_tvzero(tv)) {
01057             tv = ast_tv(30000, 0);
01058          }
01059          res = ast_select(n + 1, &rfds, NULL, &efds, &tv);
01060       } else {
01061          res = ast_select(n + 1, &rfds, NULL, &efds, NULL);
01062          tv = ast_tv(0,0);
01063          tonepos = 0;
01064       }
01065       /* Okay, select has finished.  Let's see what happened.  */
01066       if (res < 0) {
01067          ast_log(LOG_DEBUG, "select return %d: %s\n", res, strerror(errno));
01068          continue;
01069       }
01070       /* If there are no fd's changed, just continue, it's probably time
01071          to play some more dialtones */
01072       if (!res)
01073          continue;
01074       /* Alright, lock the interface list again, and let's look and see what has
01075          happened */
01076       if (ast_mutex_lock(&iflock)) {
01077          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01078          continue;
01079       }
01080 
01081       i = iflist;
01082       for(; i; i=i->next) {
01083          if (FD_ISSET(i->fd, &rfds)) {
01084             if (i->owner) {
01085                continue;
01086             }
01087             phone_mini_packet(i);
01088          }
01089          if (FD_ISSET(i->fd, &efds)) {
01090             if (i->owner) {
01091                continue;
01092             }
01093             phone_check_exception(i);
01094          }
01095       }
01096       ast_mutex_unlock(&iflock);
01097    }
01098    return NULL;
01099    
01100 }
01101 
01102 static int restart_monitor()
01103 {
01104    /* If we're supposed to be stopped -- stay stopped */
01105    if (monitor_thread == AST_PTHREADT_STOP)
01106       return 0;
01107    if (ast_mutex_lock(&monlock)) {
01108       ast_log(LOG_WARNING, "Unable to lock monitor\n");
01109       return -1;
01110    }
01111    if (monitor_thread == pthread_self()) {
01112       ast_mutex_unlock(&monlock);
01113       ast_log(LOG_WARNING, "Cannot kill myself\n");
01114       return -1;
01115    }
01116    if (monitor_thread != AST_PTHREADT_NULL) {
01117       if (ast_mutex_lock(&iflock)) {
01118          ast_mutex_unlock(&monlock);
01119          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01120          return -1;
01121       }
01122       monitor = 0;
01123       while (pthread_kill(monitor_thread, SIGURG) == 0)
01124          sched_yield();
01125       pthread_join(monitor_thread, NULL);
01126       ast_mutex_unlock(&iflock);
01127    }
01128    monitor = 1;
01129    /* Start a new monitor */
01130    if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
01131       ast_mutex_unlock(&monlock);
01132       ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
01133       return -1;
01134    }
01135    ast_mutex_unlock(&monlock);
01136    return 0;
01137 }
01138 
01139 static struct phone_pvt *mkif(char *iface, int mode, int txgain, int rxgain)
01140 {
01141    /* Make a phone_pvt structure for this interface */
01142    struct phone_pvt *tmp;
01143    int flags;  
01144    
01145    tmp = malloc(sizeof(struct phone_pvt));
01146    if (tmp) {
01147       tmp->fd = open(iface, O_RDWR);
01148       if (tmp->fd < 0) {
01149          ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);
01150          free(tmp);
01151          return NULL;
01152       }
01153       if (mode == MODE_FXO) {
01154          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_PSTN)) 
01155             ast_log(LOG_DEBUG, "Unable to set port to PSTN\n");
01156       } else {
01157          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_POTS)) 
01158              if (mode != MODE_FXS)
01159                   ast_log(LOG_DEBUG, "Unable to set port to POTS\n");
01160       }
01161       ioctl(tmp->fd, PHONE_PLAY_STOP);
01162       ioctl(tmp->fd, PHONE_REC_STOP);
01163       ioctl(tmp->fd, PHONE_RING_STOP);
01164       ioctl(tmp->fd, PHONE_CPT_STOP);
01165       if (ioctl(tmp->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK)) 
01166          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",iface, strerror(errno));
01167       if (echocancel != AEC_OFF)
01168          ioctl(tmp->fd, IXJCTL_AEC_START, echocancel);
01169       if (silencesupression) 
01170          tmp->silencesupression = 1;
01171 #ifdef PHONE_VAD
01172       ioctl(tmp->fd, PHONE_VAD, tmp->silencesupression);
01173 #endif
01174       tmp->mode = mode;
01175       flags = fcntl(tmp->fd, F_GETFL);
01176       fcntl(tmp->fd, F_SETFL, flags | O_NONBLOCK);
01177       tmp->owner = NULL;
01178       tmp->lastformat = -1;
01179       tmp->lastinput = -1;
01180       tmp->ministate = 0;
01181       memset(tmp->ext, 0, sizeof(tmp->ext));
01182       ast_copy_string(tmp->language, language, sizeof(tmp->language));
01183       ast_copy_string(tmp->dev, iface, sizeof(tmp->dev));
01184       ast_copy_string(tmp->context, context, sizeof(tmp->context));
01185       tmp->next = NULL;
01186       tmp->obuflen = 0;
01187       tmp->dialtone = 0;
01188       tmp->cpt = 0;
01189       ast_copy_string(tmp->cid_num, cid_num, sizeof(tmp->cid_num));
01190       ast_copy_string(tmp->cid_name, cid_name, sizeof(tmp->cid_name));
01191       tmp->txgain = txgain;
01192       ioctl(tmp->fd, PHONE_PLAY_VOLUME, tmp->txgain);
01193       tmp->rxgain = rxgain;
01194       ioctl(tmp->fd, PHONE_REC_VOLUME, tmp->rxgain);
01195    }
01196    return tmp;
01197 }
01198 
01199 static struct ast_channel *phone_request(const char *type, int format, void *data, int *cause)
01200 {
01201    int oldformat;
01202    struct phone_pvt *p;
01203    struct ast_channel *tmp = NULL;
01204    char *name = data;
01205 
01206    /* Search for an unowned channel */
01207    if (ast_mutex_lock(&iflock)) {
01208       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01209       return NULL;
01210    }
01211    p = iflist;
01212    while(p) {
01213       if (p->mode == MODE_FXS ||
01214           format & (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) {
01215           size_t length = strlen(p->dev + 5);
01216          if (strncmp(name, p->dev + 5, length) == 0 &&
01217              !isalnum(name[length])) {
01218              if (!p->owner) {
01219                      tmp = phone_new(p, AST_STATE_DOWN, p->context);
01220                      break;
01221                 } else
01222                      *cause = AST_CAUSE_BUSY;
01223             }
01224       }
01225       p = p->next;
01226    }
01227    ast_mutex_unlock(&iflock);
01228    restart_monitor();
01229    if (tmp == NULL) {
01230       oldformat = format;
01231       format &= (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW);
01232       if (!format) {
01233          ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
01234          return NULL;
01235       }
01236    }
01237    return tmp;
01238 }
01239 
01240 /* parse gain value from config file */
01241 static int parse_gain_value(char *gain_type, char *value)
01242 {
01243    float gain;
01244 
01245    /* try to scan number */
01246    if (sscanf(value, "%30f", &gain) != 1)
01247    {
01248       ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n",
01249          value, gain_type, config);
01250       return DEFAULT_GAIN;
01251    }
01252 
01253    /* multiplicate gain by 1.0 gain value */ 
01254    gain = gain * (float)DEFAULT_GAIN;
01255 
01256    /* percentage? */
01257    if (value[strlen(value) - 1] == '%')
01258       return (int)(gain / (float)100);
01259 
01260    return (int)gain;
01261 }
01262 
01263 static int __unload_module(void)
01264 {
01265    struct phone_pvt *p, *pl;
01266    /* First, take us out of the channel loop */
01267    if (cur_tech)
01268       ast_channel_unregister(cur_tech);
01269    if (!ast_mutex_lock(&iflock)) {
01270       /* Hangup all interfaces if they have an owner */
01271       p = iflist;
01272       while(p) {
01273          if (p->owner)
01274             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
01275          p = p->next;
01276       }
01277       iflist = NULL;
01278       ast_mutex_unlock(&iflock);
01279    } else {
01280       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01281       return -1;
01282    }
01283    if (!ast_mutex_lock(&monlock)) {
01284       if (monitor_thread > AST_PTHREADT_NULL) {
01285          monitor = 0;
01286          while (pthread_kill(monitor_thread, SIGURG) == 0)
01287             sched_yield();
01288          pthread_join(monitor_thread, NULL);
01289       }
01290       monitor_thread = AST_PTHREADT_STOP;
01291       ast_mutex_unlock(&monlock);
01292    } else {
01293       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01294       return -1;
01295    }
01296 
01297    if (!ast_mutex_lock(&iflock)) {
01298       /* Destroy all the interfaces and free their memory */
01299       p = iflist;
01300       while(p) {
01301          /* Close the socket, assuming it's real */
01302          if (p->fd > -1)
01303             close(p->fd);
01304          pl = p;
01305          p = p->next;
01306          /* Free associated memory */
01307          free(pl);
01308       }
01309       iflist = NULL;
01310       ast_mutex_unlock(&iflock);
01311    } else {
01312       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01313       return -1;
01314    }
01315       
01316    return 0;
01317 }
01318 
01319 static int unload_module(void)
01320 {
01321    return __unload_module();
01322 }
01323 
01324 static int load_module(void)
01325 {
01326    struct ast_config *cfg;
01327    struct ast_variable *v;
01328    struct phone_pvt *tmp;
01329    int mode = MODE_IMMEDIATE;
01330    int txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; /* default gain 1.0 */
01331    cfg = ast_config_load(config);
01332 
01333    /* We *must* have a config file otherwise stop immediately */
01334    if (!cfg) {
01335       ast_log(LOG_ERROR, "Unable to load config %s\n", config);
01336       return AST_MODULE_LOAD_DECLINE;
01337    }
01338    if (ast_mutex_lock(&iflock)) {
01339       /* It's a little silly to lock it, but we mind as well just to be sure */
01340       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01341       return AST_MODULE_LOAD_FAILURE;
01342    }
01343    v = ast_variable_browse(cfg, "interfaces");
01344    while(v) {
01345       /* Create the interface list */
01346       if (!strcasecmp(v->name, "device")) {
01347             tmp = mkif(v->value, mode, txgain, rxgain);
01348             if (tmp) {
01349                tmp->next = iflist;
01350                iflist = tmp;
01351                
01352             } else {
01353                ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
01354                ast_config_destroy(cfg);
01355                ast_mutex_unlock(&iflock);
01356                __unload_module();
01357                return AST_MODULE_LOAD_FAILURE;
01358             }
01359       } else if (!strcasecmp(v->name, "silencesupression")) {
01360          silencesupression = ast_true(v->value);
01361       } else if (!strcasecmp(v->name, "language")) {
01362          ast_copy_string(language, v->value, sizeof(language));
01363       } else if (!strcasecmp(v->name, "callerid")) {
01364          ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
01365       } else if (!strcasecmp(v->name, "mode")) {
01366          if (!strncasecmp(v->value, "di", 2)) 
01367             mode = MODE_DIALTONE;
01368          else if (!strncasecmp(v->value, "sig", 3))
01369             mode = MODE_SIGMA;
01370          else if (!strncasecmp(v->value, "im", 2))
01371             mode = MODE_IMMEDIATE;
01372          else if (!strncasecmp(v->value, "fxs", 3)) {
01373             mode = MODE_FXS;
01374             prefformat = 0x01ff0000; /* All non-voice */
01375          }
01376          else if (!strncasecmp(v->value, "fx", 2))
01377             mode = MODE_FXO;
01378          else
01379             ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
01380       } else if (!strcasecmp(v->name, "context")) {
01381          ast_copy_string(context, v->value, sizeof(context));
01382       } else if (!strcasecmp(v->name, "format")) {
01383          if (!strcasecmp(v->value, "g723.1")) {
01384             prefformat = AST_FORMAT_G723_1;
01385          } else if (!strcasecmp(v->value, "slinear")) {
01386             if (mode == MODE_FXS)
01387                 prefformat |= AST_FORMAT_SLINEAR;
01388             else prefformat = AST_FORMAT_SLINEAR;
01389          } else if (!strcasecmp(v->value, "ulaw")) {
01390             prefformat = AST_FORMAT_ULAW;
01391          } else
01392             ast_log(LOG_WARNING, "Unknown format '%s'\n", v->value);
01393       } else if (!strcasecmp(v->name, "echocancel")) {
01394          if (!strcasecmp(v->value, "off")) {
01395             echocancel = AEC_OFF;
01396          } else if (!strcasecmp(v->value, "low")) {
01397             echocancel = AEC_LOW;
01398          } else if (!strcasecmp(v->value, "medium")) {
01399             echocancel = AEC_MED;
01400          } else if (!strcasecmp(v->value, "high")) {
01401             echocancel = AEC_HIGH;
01402          } else 
01403             ast_log(LOG_WARNING, "Unknown echo cancellation '%s'\n", v->value);
01404       } else if (!strcasecmp(v->name, "txgain")) {
01405          txgain = parse_gain_value(v->name, v->value);
01406       } else if (!strcasecmp(v->name, "rxgain")) {
01407          rxgain = parse_gain_value(v->name, v->value);
01408       }  
01409       v = v->next;
01410    }
01411    ast_mutex_unlock(&iflock);
01412 
01413    if (mode == MODE_FXS) {
01414       phone_tech_fxs.capabilities = prefformat;
01415       cur_tech = &phone_tech_fxs;
01416    } else
01417       cur_tech = (struct ast_channel_tech *) &phone_tech;
01418 
01419    /* Make sure we can register our Adtranphone channel type */
01420 
01421    if (ast_channel_register(cur_tech)) {
01422       ast_log(LOG_ERROR, "Unable to register channel class 'Phone'\n");
01423       ast_config_destroy(cfg);
01424       __unload_module();
01425       return AST_MODULE_LOAD_FAILURE;
01426    }
01427    ast_config_destroy(cfg);
01428    /* And start the monitor for the first time */
01429    restart_monitor();
01430    return AST_MODULE_LOAD_SUCCESS;
01431 }
01432 
01433 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Linux Telephony API Support");

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