Wed Oct 28 15:47:51 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  * \ingroup channel_drivers
00024  */
00025 
00026 #include <stdio.h>
00027 #include <string.h>
00028 #include <ctype.h>
00029 #include <sys/socket.h>
00030 #include <sys/time.h>
00031 #include <errno.h>
00032 #include <unistd.h>
00033 #include <stdlib.h>
00034 #include <arpa/inet.h>
00035 #include <fcntl.h>
00036 #include <sys/ioctl.h>
00037 #ifdef HAVE_LINUX_COMPILER_H
00038 #include <linux/compiler.h>
00039 #endif
00040 #include <linux/telephony.h>
00041 /* Still use some IXJ specific stuff */
00042 #include <linux/version.h>
00043 #include <linux/ixjuser.h>
00044 
00045 #include "asterisk.h"
00046 
00047 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 211526 $")
00048 
00049 #include "asterisk/lock.h"
00050 #include "asterisk/channel.h"
00051 #include "asterisk/config.h"
00052 #include "asterisk/logger.h"
00053 #include "asterisk/module.h"
00054 #include "asterisk/pbx.h"
00055 #include "asterisk/options.h"
00056 #include "asterisk/utils.h"
00057 #include "asterisk/callerid.h"
00058 #include "asterisk/causes.h"
00059 #include "DialTone.h"
00060 
00061 #ifdef QTI_PHONEJACK_TJ_PCI   /* check for the newer quicknet driver v.3.1.0 which has this symbol */
00062 #define QNDRV_VER 310
00063 #else
00064 #define QNDRV_VER 100
00065 #endif
00066 
00067 #if QNDRV_VER > 100
00068 #ifdef __linux__
00069 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00070 #else /* FreeBSD and others */
00071 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, x);
00072 #endif /* __linux__ */
00073 #else /* older driver */
00074 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00075 #endif
00076 
00077 #define DEFAULT_CALLER_ID "Unknown"
00078 #define PHONE_MAX_BUF 480
00079 #define DEFAULT_GAIN 0x100
00080 
00081 static const char desc[] = "Linux Telephony API Support";
00082 static const char type[] = "Phone";
00083 static const char tdesc[] = "Standard Linux Telephony API Driver";
00084 static const char config[] = "phone.conf";
00085 
00086 /* Default context for dialtone mode */
00087 static char context[AST_MAX_EXTENSION] = "default";
00088 
00089 /* Default language */
00090 static char language[MAX_LANGUAGE] = "";
00091 static int usecnt =0;
00092 
00093 static int echocancel = AEC_OFF;
00094 
00095 static int silencesupression = 0;
00096 
00097 static int prefformat = AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW;
00098 
00099 AST_MUTEX_DEFINE_STATIC(usecnt_lock);
00100 
00101 /* Protect the interface list (of phone_pvt's) */
00102 AST_MUTEX_DEFINE_STATIC(iflock);
00103 
00104 /* Protect the monitoring thread, so only one process can kill or start it, and not
00105    when it's doing something critical. */
00106 AST_MUTEX_DEFINE_STATIC(monlock);
00107    
00108 /* This is the thread for the monitor which checks for input on the channels
00109    which are not currently in use.  */
00110 static pthread_t monitor_thread = AST_PTHREADT_NULL;
00111 
00112 static int restart_monitor(void);
00113 
00114 /* The private structures of the Phone Jack channels are linked for
00115    selecting outgoing channels */
00116    
00117 #define MODE_DIALTONE   1
00118 #define MODE_IMMEDIATE  2
00119 #define MODE_FXO     3
00120 #define MODE_FXS        4
00121 
00122 static struct phone_pvt {
00123    int fd;                    /* Raw file descriptor for this device */
00124    struct ast_channel *owner;    /* Channel we belong to, possibly NULL */
00125    int mode;                  /* Is this in the  */
00126    int lastformat;               /* Last output format */
00127    int lastinput;             /* Last input format */
00128    int ministate;             /* Miniature state, for dialtone mode */
00129    char dev[256];             /* Device name */
00130    struct phone_pvt *next;       /* Next channel in list */
00131    struct ast_frame fr;       /* Frame */
00132    char offset[AST_FRIENDLY_OFFSET];
00133    char buf[PHONE_MAX_BUF];               /* Static buffer for reading frames */
00134    int obuflen;
00135    int dialtone;
00136    int txgain, rxgain;             /* gain control for playing, recording  */
00137                            /* 0x100 - 1.0, 0x200 - 2.0, 0x80 - 0.5 */
00138    int cpt;                /* Call Progress Tone playing? */
00139    int silencesupression;
00140    char context[AST_MAX_EXTENSION];
00141    char obuf[PHONE_MAX_BUF * 2];
00142    char ext[AST_MAX_EXTENSION];
00143    char language[MAX_LANGUAGE];
00144    char cid_num[AST_MAX_EXTENSION];
00145    char cid_name[AST_MAX_EXTENSION];
00146 } *iflist = NULL;
00147 
00148 static char cid_num[AST_MAX_EXTENSION];
00149 static char cid_name[AST_MAX_EXTENSION];
00150 
00151 static struct ast_channel *phone_request(const char *type, int format, void *data, int *cause);
00152 static int phone_digit(struct ast_channel *ast, char digit);
00153 static int phone_call(struct ast_channel *ast, char *dest, int timeout);
00154 static int phone_hangup(struct ast_channel *ast);
00155 static int phone_answer(struct ast_channel *ast);
00156 static struct ast_frame *phone_read(struct ast_channel *ast);
00157 static int phone_write(struct ast_channel *ast, struct ast_frame *frame);
00158 static struct ast_frame *phone_exception(struct ast_channel *ast);
00159 static int phone_send_text(struct ast_channel *ast, const char *text);
00160 static int phone_fixup(struct ast_channel *old, struct ast_channel *new);
00161 
00162 static const struct ast_channel_tech phone_tech = {
00163    .type = type,
00164    .description = tdesc,
00165    .capabilities = AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW,
00166    .requester = phone_request,
00167    .send_digit = phone_digit,
00168    .call = phone_call,
00169    .hangup = phone_hangup,
00170    .answer = phone_answer,
00171    .read = phone_read,
00172    .write = phone_write,
00173    .exception = phone_exception,
00174    .fixup = phone_fixup
00175 };
00176 
00177 static struct ast_channel_tech phone_tech_fxs = {
00178    .type = type,
00179    .description = tdesc,
00180    .requester = phone_request,
00181    .send_digit = phone_digit,
00182    .call = phone_call,
00183    .hangup = phone_hangup,
00184    .answer = phone_answer,
00185    .read = phone_read,
00186    .write = phone_write,
00187    .exception = phone_exception,
00188    .write_video = phone_write,
00189    .send_text = phone_send_text,
00190    .fixup = phone_fixup
00191 };
00192 
00193 static struct ast_channel_tech *cur_tech;
00194 
00195 static int phone_fixup(struct ast_channel *old, struct ast_channel *new)
00196 {
00197    struct phone_pvt *pvt = old->tech_pvt;
00198    if (pvt && pvt->owner == old)
00199       pvt->owner = new;
00200    return 0;
00201 }
00202 
00203 static int phone_digit(struct ast_channel *ast, char digit)
00204 {
00205    struct phone_pvt *p;
00206    int outdigit;
00207    p = ast->tech_pvt;
00208    ast_log(LOG_NOTICE, "Dialed %c\n", digit);
00209    switch(digit) {
00210    case '0':
00211    case '1':
00212    case '2':
00213    case '3':
00214    case '4':
00215    case '5':
00216    case '6':
00217    case '7':
00218    case '8':
00219    case '9':
00220       outdigit = digit - '0';
00221       break;
00222    case '*':
00223       outdigit = 11;
00224       break;
00225    case '#':
00226       outdigit = 12;
00227       break;
00228    case 'f':   /*flash*/
00229    case 'F':
00230       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00231       usleep(320000);
00232       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00233       p->lastformat = -1;
00234       return 0;
00235    default:
00236       ast_log(LOG_WARNING, "Unknown digit '%c'\n", digit);
00237       return -1;
00238    }
00239    ast_log(LOG_NOTICE, "Dialed %d\n", outdigit);
00240    ioctl(p->fd, PHONE_PLAY_TONE, outdigit);
00241    p->lastformat = -1;
00242    return 0;
00243 }
00244 
00245 static int phone_call(struct ast_channel *ast, char *dest, int timeout)
00246 {
00247    struct phone_pvt *p;
00248 
00249    PHONE_CID cid;
00250    time_t UtcTime;
00251    struct tm tm;
00252    int start;
00253 
00254    time(&UtcTime);
00255    localtime_r(&UtcTime,&tm);
00256 
00257    memset(&cid, 0, sizeof(PHONE_CID));
00258    if(&tm != NULL) {
00259       snprintf(cid.month, sizeof(cid.month), "%02d",(tm.tm_mon + 1));
00260       snprintf(cid.day, sizeof(cid.day),     "%02d", tm.tm_mday);
00261       snprintf(cid.hour, sizeof(cid.hour),   "%02d", tm.tm_hour);
00262       snprintf(cid.min, sizeof(cid.min),     "%02d", tm.tm_min);
00263    }
00264    /* the standard format of ast->callerid is:  "name" <number>, but not always complete */
00265    if (ast_strlen_zero(ast->cid.cid_name))
00266       strncpy(cid.name, DEFAULT_CALLER_ID, sizeof(cid.name) - 1);
00267    else
00268       strncpy(cid.name, ast->cid.cid_name, sizeof(cid.name) - 1);
00269 
00270    if (ast->cid.cid_num) 
00271       strncpy(cid.number, ast->cid.cid_num, sizeof(cid.number) - 1);
00272 
00273    p = ast->tech_pvt;
00274 
00275    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
00276       ast_log(LOG_WARNING, "phone_call called on %s, neither down nor reserved\n", ast->name);
00277       return -1;
00278    }
00279    if (option_debug)
00280       ast_log(LOG_DEBUG, "Ringing %s on %s (%d)\n", dest, ast->name, ast->fds[0]);
00281 
00282    start = IXJ_PHONE_RING_START(cid);
00283    if (start == -1)
00284       return -1;
00285    
00286    if (p->mode == MODE_FXS) {
00287       char *digit = strchr(dest, '/');
00288       if (digit)
00289       {
00290         digit++;
00291         while (*digit)
00292           phone_digit(ast, *digit++);
00293       }
00294    }
00295  
00296    ast_setstate(ast, AST_STATE_RINGING);
00297    ast_queue_control(ast, AST_CONTROL_RINGING);
00298    return 0;
00299 }
00300 
00301 static int phone_hangup(struct ast_channel *ast)
00302 {
00303    struct phone_pvt *p;
00304    p = ast->tech_pvt;
00305    if (option_debug)
00306       ast_log(LOG_DEBUG, "phone_hangup(%s)\n", ast->name);
00307    if (!ast->tech_pvt) {
00308       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00309       return 0;
00310    }
00311    /* XXX Is there anything we can do to really hang up except stop recording? */
00312    ast_setstate(ast, AST_STATE_DOWN);
00313    if (ioctl(p->fd, PHONE_REC_STOP))
00314       ast_log(LOG_WARNING, "Failed to stop recording\n");
00315    if (ioctl(p->fd, PHONE_PLAY_STOP))
00316       ast_log(LOG_WARNING, "Failed to stop playing\n");
00317    if (ioctl(p->fd, PHONE_RING_STOP))
00318       ast_log(LOG_WARNING, "Failed to stop ringing\n");
00319    if (ioctl(p->fd, PHONE_CPT_STOP))
00320       ast_log(LOG_WARNING, "Failed to stop sounds\n");
00321 
00322    /* If it's an FXO, hang them up */
00323    if (p->mode == MODE_FXO) {
00324       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK)) 
00325          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",ast->name, strerror(errno));
00326    }
00327 
00328    /* If they're off hook, give a busy signal */
00329    if (ioctl(p->fd, PHONE_HOOKSTATE)) {
00330       if (option_debug)
00331          ast_log(LOG_DEBUG, "Got hunghup, giving busy signal\n");
00332       ioctl(p->fd, PHONE_BUSY);
00333       p->cpt = 1;
00334    }
00335    p->lastformat = -1;
00336    p->lastinput = -1;
00337    p->ministate = 0;
00338    p->obuflen = 0;
00339    p->dialtone = 0;
00340    memset(p->ext, 0, sizeof(p->ext));
00341    ((struct phone_pvt *)(ast->tech_pvt))->owner = NULL;
00342    ast_mutex_lock(&usecnt_lock);
00343    usecnt--;
00344    if (usecnt < 0) 
00345       ast_log(LOG_WARNING, "Usecnt < 0???\n");
00346    ast_mutex_unlock(&usecnt_lock);
00347    ast_update_use_count();
00348    if (option_verbose > 2) 
00349       ast_verbose( VERBOSE_PREFIX_3 "Hungup '%s'\n", ast->name);
00350    ast->tech_pvt = NULL;
00351    ast_setstate(ast, AST_STATE_DOWN);
00352    restart_monitor();
00353    return 0;
00354 }
00355 
00356 static int phone_setup(struct ast_channel *ast)
00357 {
00358    struct phone_pvt *p;
00359    p = ast->tech_pvt;
00360    ioctl(p->fd, PHONE_CPT_STOP);
00361    /* Nothing to answering really, just start recording */
00362    if (ast->rawreadformat == AST_FORMAT_G723_1) {
00363       /* Prefer g723 */
00364       ioctl(p->fd, PHONE_REC_STOP);
00365       if (p->lastinput != AST_FORMAT_G723_1) {
00366          p->lastinput = AST_FORMAT_G723_1;
00367          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00368             ast_log(LOG_WARNING, "Failed to set codec to g723.1\n");
00369             return -1;
00370          }
00371       }
00372    } else if (ast->rawreadformat == AST_FORMAT_SLINEAR) {
00373       ioctl(p->fd, PHONE_REC_STOP);
00374       if (p->lastinput != AST_FORMAT_SLINEAR) {
00375          p->lastinput = AST_FORMAT_SLINEAR;
00376          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00377             ast_log(LOG_WARNING, "Failed to set codec to signed linear 16\n");
00378             return -1;
00379          }
00380       }
00381    } else if (ast->rawreadformat == AST_FORMAT_ULAW) {
00382       ioctl(p->fd, PHONE_REC_STOP);
00383       if (p->lastinput != AST_FORMAT_ULAW) {
00384          p->lastinput = AST_FORMAT_ULAW;
00385          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00386             ast_log(LOG_WARNING, "Failed to set codec to uLaw\n");
00387             return -1;
00388          }
00389       }
00390    } else if (p->mode == MODE_FXS) {
00391       ioctl(p->fd, PHONE_REC_STOP);
00392       if (p->lastinput != ast->rawreadformat) {
00393          p->lastinput = ast->rawreadformat;
00394          if (ioctl(p->fd, PHONE_REC_CODEC, ast->rawreadformat)) {
00395             ast_log(LOG_WARNING, "Failed to set codec to %d\n", 
00396                ast->rawreadformat);
00397             return -1;
00398          }
00399       }
00400    } else {
00401       ast_log(LOG_WARNING, "Can't do format %s\n", ast_getformatname(ast->rawreadformat));
00402       return -1;
00403    }
00404    if (ioctl(p->fd, PHONE_REC_START)) {
00405       ast_log(LOG_WARNING, "Failed to start recording\n");
00406       return -1;
00407    }
00408    /* set the DTMF times (the default is too short) */
00409    ioctl(p->fd, PHONE_SET_TONE_ON_TIME, 300);
00410    ioctl(p->fd, PHONE_SET_TONE_OFF_TIME, 200);
00411    return 0;
00412 }
00413 
00414 static int phone_answer(struct ast_channel *ast)
00415 {
00416    struct phone_pvt *p;
00417    p = ast->tech_pvt;
00418    /* In case it's a LineJack, take it off hook */
00419    if (p->mode == MODE_FXO) {
00420       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_OFF_HOOK)) 
00421          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n", ast->name, strerror(errno));
00422       else
00423          ast_log(LOG_DEBUG, "Took linejack off hook\n");
00424    }
00425    phone_setup(ast);
00426    if (option_debug)
00427       ast_log(LOG_DEBUG, "phone_answer(%s)\n", ast->name);
00428    ast->rings = 0;
00429    ast_setstate(ast, AST_STATE_UP);
00430    return 0;
00431 }
00432 
00433 #if 0
00434 static char phone_2digit(char c)
00435 {
00436    if (c == 12)
00437       return '#';
00438    else if (c == 11)
00439       return '*';
00440    else if ((c < 10) && (c >= 0))
00441       return '0' + c - 1;
00442    else
00443       return '?';
00444 }
00445 #endif
00446 
00447 static struct ast_frame  *phone_exception(struct ast_channel *ast)
00448 {
00449    int res;
00450    union telephony_exception phonee;
00451    struct phone_pvt *p = ast->tech_pvt;
00452    char digit;
00453 
00454    /* Some nice norms */
00455    p->fr.datalen = 0;
00456    p->fr.samples = 0;
00457    p->fr.data =  NULL;
00458    p->fr.src = type;
00459    p->fr.offset = 0;
00460    p->fr.mallocd=0;
00461    p->fr.delivery = ast_tv(0,0);
00462    
00463    phonee.bytes = ioctl(p->fd, PHONE_EXCEPTION);
00464    if (phonee.bits.dtmf_ready)  {
00465       if (option_debug)
00466          ast_log(LOG_DEBUG, "phone_exception(): DTMF\n");
00467    
00468       /* We've got a digit -- Just handle this nicely and easily */
00469       digit =  ioctl(p->fd, PHONE_GET_DTMF_ASCII);
00470       p->fr.subclass = digit;
00471       p->fr.frametype = AST_FRAME_DTMF;
00472       return &p->fr;
00473    }
00474    if (phonee.bits.hookstate) {
00475       if (option_debug)
00476          ast_log(LOG_DEBUG, "Hookstate changed\n");
00477       res = ioctl(p->fd, PHONE_HOOKSTATE);
00478       /* See if we've gone on hook, if so, notify by returning NULL */
00479       if (option_debug)
00480          ast_log(LOG_DEBUG, "New hookstate: %d\n", res);
00481       if (!res && (p->mode != MODE_FXO))
00482          return NULL;
00483       else {
00484          if (ast->_state == AST_STATE_RINGING) {
00485             /* They've picked up the phone */
00486             p->fr.frametype = AST_FRAME_CONTROL;
00487             p->fr.subclass = AST_CONTROL_ANSWER;
00488             phone_setup(ast);
00489             ast_setstate(ast, AST_STATE_UP);
00490             return &p->fr;
00491          }  else 
00492             ast_log(LOG_WARNING, "Got off hook in weird state %d\n", ast->_state);
00493       }
00494    }
00495 #if 1
00496    if (phonee.bits.pstn_ring)
00497       ast_verbose("Unit is ringing\n");
00498    if (phonee.bits.caller_id) {
00499       ast_verbose("We have caller ID\n");
00500    }
00501    if (phonee.bits.pstn_wink)
00502       ast_verbose("Detected Wink\n");
00503 #endif
00504    /* Strange -- nothing there.. */
00505    p->fr.frametype = AST_FRAME_NULL;
00506    p->fr.subclass = 0;
00507    return &p->fr;
00508 }
00509 
00510 static struct ast_frame  *phone_read(struct ast_channel *ast)
00511 {
00512    int res;
00513    struct phone_pvt *p = ast->tech_pvt;
00514    
00515 
00516    /* Some nice norms */
00517    p->fr.datalen = 0;
00518    p->fr.samples = 0;
00519    p->fr.data =  NULL;
00520    p->fr.src = type;
00521    p->fr.offset = 0;
00522    p->fr.mallocd=0;
00523    p->fr.delivery = ast_tv(0,0);
00524 
00525    /* Try to read some data... */
00526    CHECK_BLOCKING(ast);
00527    res = read(p->fd, p->buf, PHONE_MAX_BUF);
00528    ast_clear_flag(ast, AST_FLAG_BLOCKING);
00529    if (res < 0) {
00530 #if 0
00531       if (errno == EAGAIN) {
00532          ast_log(LOG_WARNING, "Null frame received\n");
00533          p->fr.frametype = AST_FRAME_NULL;
00534          p->fr.subclass = 0;
00535          return &p->fr;
00536       }
00537 #endif
00538       ast_log(LOG_WARNING, "Error reading: %s\n", strerror(errno));
00539       return NULL;
00540    }
00541    p->fr.data = p->buf;
00542    if (p->mode != MODE_FXS)
00543    switch(p->buf[0] & 0x3) {
00544    case '0':
00545    case '1':
00546       /* Normal */
00547       break;
00548    case '2':
00549    case '3':
00550       /* VAD/CNG, only send two words */
00551       res = 4;
00552       break;
00553    }
00554    p->fr.samples = 240;
00555    p->fr.datalen = res;
00556    p->fr.frametype = p->lastinput <= AST_FORMAT_MAX_AUDIO ?
00557                           AST_FRAME_VOICE : 
00558            p->lastinput <= AST_FORMAT_PNG ? AST_FRAME_IMAGE 
00559            : AST_FRAME_VIDEO;
00560    p->fr.subclass = p->lastinput;
00561    p->fr.offset = AST_FRIENDLY_OFFSET;
00562    /* Byteswap from little-endian to native-endian */
00563    if (p->fr.subclass == AST_FORMAT_SLINEAR)
00564       ast_frame_byteswap_le(&p->fr);
00565    return &p->fr;
00566 }
00567 
00568 static int phone_write_buf(struct phone_pvt *p, const char *buf, int len, int frlen, int swap)
00569 {
00570    int res;
00571    /* Store as much of the buffer as we can, then write fixed frames */
00572    int space = sizeof(p->obuf) - p->obuflen;
00573    /* Make sure we have enough buffer space to store the frame */
00574    if (space < len)
00575       len = space;
00576    if (swap)
00577       ast_swapcopy_samples(p->obuf+p->obuflen, buf, len/2);
00578    else
00579       memcpy(p->obuf + p->obuflen, buf, len);
00580    p->obuflen += len;
00581    while(p->obuflen > frlen) {
00582       res = write(p->fd, p->obuf, frlen);
00583       if (res != frlen) {
00584          if (res < 1) {
00585 /*
00586  * Card is in non-blocking mode now and it works well now, but there are
00587  * lot of messages like this. So, this message is temporarily disabled.
00588  */
00589             return 0;
00590          } else {
00591             ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frlen);
00592          }
00593       }
00594       p->obuflen -= frlen;
00595       /* Move memory if necessary */
00596       if (p->obuflen) 
00597          memmove(p->obuf, p->obuf + frlen, p->obuflen);
00598    }
00599    return len;
00600 }
00601 
00602 static int phone_send_text(struct ast_channel *ast, const char *text)
00603 {
00604     int length = strlen(text);
00605     return phone_write_buf(ast->tech_pvt, text, length, length, 0) == 
00606            length ? 0 : -1;
00607 }
00608 
00609 static int phone_write(struct ast_channel *ast, struct ast_frame *frame)
00610 {
00611    struct phone_pvt *p = ast->tech_pvt;
00612    int res;
00613    int maxfr=0;
00614    char *pos;
00615    int sofar;
00616    int expected;
00617    int codecset = 0;
00618    char tmpbuf[4];
00619    /* Write a frame of (presumably voice) data */
00620    if (frame->frametype != AST_FRAME_VOICE && p->mode != MODE_FXS) {
00621       if (frame->frametype != AST_FRAME_IMAGE)
00622          ast_log(LOG_WARNING, "Don't know what to do with  frame type '%d'\n", frame->frametype);
00623       return 0;
00624    }
00625    if (!(frame->subclass &
00626       (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) && 
00627        p->mode != MODE_FXS) {
00628       ast_log(LOG_WARNING, "Cannot handle frames in %d format\n", frame->subclass);
00629       return -1;
00630    }
00631 #if 0
00632    /* If we're not in up mode, go into up mode now */
00633    if (ast->_state != AST_STATE_UP) {
00634       ast_setstate(ast, AST_STATE_UP);
00635       phone_setup(ast);
00636    }
00637 #else
00638    if (ast->_state != AST_STATE_UP) {
00639       /* Don't try tos end audio on-hook */
00640       return 0;
00641    }
00642 #endif   
00643    if (frame->subclass == AST_FORMAT_G723_1) {
00644       if (p->lastformat != AST_FORMAT_G723_1) {
00645          ioctl(p->fd, PHONE_PLAY_STOP);
00646          ioctl(p->fd, PHONE_REC_STOP);
00647          if (ioctl(p->fd, PHONE_PLAY_CODEC, G723_63)) {
00648             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00649             return -1;
00650          }
00651          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00652             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00653             return -1;
00654          }
00655          p->lastformat = AST_FORMAT_G723_1;
00656          p->lastinput = AST_FORMAT_G723_1;
00657          /* Reset output buffer */
00658          p->obuflen = 0;
00659          codecset = 1;
00660       }
00661       if (frame->datalen > 24) {
00662          ast_log(LOG_WARNING, "Frame size too large for G.723.1 (%d bytes)\n", frame->datalen);
00663          return -1;
00664       }
00665       maxfr = 24;
00666    } else if (frame->subclass == AST_FORMAT_SLINEAR) {
00667       if (p->lastformat != AST_FORMAT_SLINEAR) {
00668          ioctl(p->fd, PHONE_PLAY_STOP);
00669          ioctl(p->fd, PHONE_REC_STOP);
00670          if (ioctl(p->fd, PHONE_PLAY_CODEC, LINEAR16)) {
00671             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00672             return -1;
00673          }
00674          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00675             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00676             return -1;
00677          }
00678          p->lastformat = AST_FORMAT_SLINEAR;
00679          p->lastinput = AST_FORMAT_SLINEAR;
00680          codecset = 1;
00681          /* Reset output buffer */
00682          p->obuflen = 0;
00683       }
00684       maxfr = 480;
00685    } else if (frame->subclass == AST_FORMAT_ULAW) {
00686       if (p->lastformat != AST_FORMAT_ULAW) {
00687          ioctl(p->fd, PHONE_PLAY_STOP);
00688          ioctl(p->fd, PHONE_REC_STOP);
00689          if (ioctl(p->fd, PHONE_PLAY_CODEC, ULAW)) {
00690             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00691             return -1;
00692          }
00693          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00694             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00695             return -1;
00696          }
00697          p->lastformat = AST_FORMAT_ULAW;
00698          p->lastinput = AST_FORMAT_ULAW;
00699          codecset = 1;
00700          /* Reset output buffer */
00701          p->obuflen = 0;
00702       }
00703       maxfr = 240;
00704    } else {
00705       if (p->lastformat != frame->subclass) {
00706          ioctl(p->fd, PHONE_PLAY_STOP);
00707          ioctl(p->fd, PHONE_REC_STOP);
00708          if (ioctl(p->fd, PHONE_PLAY_CODEC, frame->subclass)) {
00709             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00710                frame->subclass);
00711             return -1;
00712          }
00713          if (ioctl(p->fd, PHONE_REC_CODEC, frame->subclass)) {
00714             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00715                frame->subclass);
00716             return -1;
00717          }
00718          p->lastformat = frame->subclass;
00719          p->lastinput = frame->subclass;
00720          codecset = 1;
00721          /* Reset output buffer */
00722          p->obuflen = 0;
00723       }
00724       maxfr = 480;
00725    }
00726    if (codecset) {
00727       ioctl(p->fd, PHONE_REC_DEPTH, 3);
00728       ioctl(p->fd, PHONE_PLAY_DEPTH, 3);
00729       if (ioctl(p->fd, PHONE_PLAY_START)) {
00730          ast_log(LOG_WARNING, "Failed to start playback\n");
00731          return -1;
00732       }
00733       if (ioctl(p->fd, PHONE_REC_START)) {
00734          ast_log(LOG_WARNING, "Failed to start recording\n");
00735          return -1;
00736       }
00737    }
00738    /* If we get here, we have a frame of Appropriate data */
00739    sofar = 0;
00740    pos = frame->data;
00741    while(sofar < frame->datalen) {
00742       /* Write in no more than maxfr sized frames */
00743       expected = frame->datalen - sofar;
00744       if (maxfr < expected)
00745          expected = maxfr;
00746       /* XXX Internet Phone Jack does not handle the 4-byte VAD frame properly! XXX 
00747          we have to pad it to 24 bytes still.  */
00748       if (frame->datalen == 4) {
00749          if (p->silencesupression) {
00750             memset(tmpbuf + 4, 0, sizeof(tmpbuf) - 4);
00751             memcpy(tmpbuf, frame->data, 4);
00752             expected = 24;
00753             res = phone_write_buf(p, tmpbuf, expected, maxfr, 0);
00754          }
00755          res = 4;
00756          expected=4;
00757       } else {
00758          int swap = 0;
00759 #if __BYTE_ORDER == __BIG_ENDIAN
00760          if (frame->subclass == AST_FORMAT_SLINEAR)
00761             swap = 1; /* Swap big-endian samples to little-endian as we copy */
00762 #endif
00763          res = phone_write_buf(p, pos, expected, maxfr, swap);
00764       }
00765       if (res != expected) {
00766          if ((errno != EAGAIN) && (errno != EINTR)) {
00767             if (res < 0) 
00768                ast_log(LOG_WARNING, "Write returned error (%s)\n", strerror(errno));
00769    /*
00770     * Card is in non-blocking mode now and it works well now, but there are
00771     * lot of messages like this. So, this message is temporarily disabled.
00772     */
00773 #if 0
00774             else
00775                ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frame->datalen);
00776 #endif
00777             return -1;
00778          } else /* Pretend it worked */
00779             res = expected;
00780       }
00781       sofar += res;
00782       pos += res;
00783    }
00784    return 0;
00785 }
00786 
00787 static struct ast_channel *phone_new(struct phone_pvt *i, int state, char *context)
00788 {
00789    struct ast_channel *tmp;
00790    struct phone_codec_data codec;
00791    tmp = ast_channel_alloc(1);
00792    if (tmp) {
00793       tmp->tech = cur_tech;
00794       snprintf(tmp->name, sizeof(tmp->name), "Phone/%s", i->dev + 5);
00795       tmp->type = type;
00796       tmp->fds[0] = i->fd;
00797       /* XXX Switching formats silently causes kernel panics XXX */
00798       if (i->mode == MODE_FXS &&
00799           ioctl(i->fd, PHONE_QUERY_CODEC, &codec) == 0) {
00800          if (codec.type == LINEAR16)
00801             tmp->nativeformats =
00802             tmp->rawreadformat =
00803             tmp->rawwriteformat =
00804             AST_FORMAT_SLINEAR;
00805          else {
00806             tmp->nativeformats =
00807             tmp->rawreadformat =
00808             tmp->rawwriteformat =
00809             prefformat & ~AST_FORMAT_SLINEAR;
00810          }
00811       }
00812       else {
00813          tmp->nativeformats = prefformat;
00814          tmp->rawreadformat = prefformat;
00815          tmp->rawwriteformat = prefformat;
00816       }
00817       ast_setstate(tmp, state);
00818       if (state == AST_STATE_RING)
00819          tmp->rings = 1;
00820       tmp->tech_pvt = i;
00821       strncpy(tmp->context, context, sizeof(tmp->context)-1);
00822       if (!ast_strlen_zero(i->ext))
00823          strncpy(tmp->exten, i->ext, sizeof(tmp->exten)-1);
00824       else
00825          strncpy(tmp->exten, "s",  sizeof(tmp->exten) - 1);
00826       if (!ast_strlen_zero(i->language))
00827          strncpy(tmp->language, i->language, sizeof(tmp->language)-1);
00828 
00829       if (!ast_strlen_zero(i->cid_num))
00830          tmp->cid.cid_num = strdup(i->cid_num);
00831       if (!ast_strlen_zero(i->cid_name))
00832          tmp->cid.cid_name = strdup(i->cid_name);
00833 
00834       i->owner = tmp;
00835       ast_mutex_lock(&usecnt_lock);
00836       usecnt++;
00837       ast_mutex_unlock(&usecnt_lock);
00838       ast_update_use_count();
00839       if (state != AST_STATE_DOWN) {
00840          if (state == AST_STATE_RING) {
00841             ioctl(tmp->fds[0], PHONE_RINGBACK);
00842             i->cpt = 1;
00843          }
00844          if (ast_pbx_start(tmp)) {
00845             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00846             ast_hangup(tmp);
00847          }
00848       }
00849    } else
00850       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
00851    return tmp;
00852 }
00853 
00854 static void phone_mini_packet(struct phone_pvt *i)
00855 {
00856    int res;
00857    char buf[1024];
00858    /* Ignore stuff we read... */
00859    res = read(i->fd, buf, sizeof(buf));
00860    if (res < 1) {
00861       ast_log(LOG_WARNING, "Read returned %d: %s\n", res, strerror(errno));
00862       return;
00863    }
00864 }
00865 
00866 static void phone_check_exception(struct phone_pvt *i)
00867 {
00868    int offhook=0;
00869    char digit[2] = {0 , 0};
00870    union telephony_exception phonee;
00871    /* XXX Do something XXX */
00872 #if 0
00873    ast_log(LOG_DEBUG, "Exception!\n");
00874 #endif
00875    phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION);
00876    if (phonee.bits.dtmf_ready)  {
00877       digit[0] = ioctl(i->fd, PHONE_GET_DTMF_ASCII);
00878       if (i->mode == MODE_DIALTONE || i->mode == MODE_FXS) {
00879          ioctl(i->fd, PHONE_PLAY_STOP);
00880          ioctl(i->fd, PHONE_REC_STOP);
00881          ioctl(i->fd, PHONE_CPT_STOP);
00882          i->dialtone = 0;
00883          if (strlen(i->ext) < AST_MAX_EXTENSION - 1)
00884             strncat(i->ext, digit, sizeof(i->ext) - strlen(i->ext) - 1);
00885          if ((i->mode != MODE_FXS ||
00886               !(phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION)) ||
00887               !phonee.bits.dtmf_ready) &&
00888              ast_exists_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00889             /* It's a valid extension in its context, get moving! */
00890             phone_new(i, AST_STATE_RING, i->context);
00891             /* No need to restart monitor, we are the monitor */
00892          } else if (!ast_canmatch_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00893             /* There is nothing in the specified extension that can match anymore.
00894                Try the default */
00895             if (ast_exists_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00896                /* Check the default, too... */
00897                phone_new(i, AST_STATE_RING, "default");
00898                /* XXX This should probably be justified better XXX */
00899             }  else if (!ast_canmatch_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00900                /* It's not a valid extension, give a busy signal */
00901                if (option_debug)
00902                   ast_log(LOG_DEBUG, "%s can't match anything in %s or default\n", i->ext, i->context);
00903                ioctl(i->fd, PHONE_BUSY);
00904                i->cpt = 1;
00905             }
00906          }
00907 #if 0
00908          ast_verbose("Extension is %s\n", i->ext);
00909 #endif
00910       }
00911    }
00912    if (phonee.bits.hookstate) {
00913       offhook = ioctl(i->fd, PHONE_HOOKSTATE);
00914       if (offhook) {
00915          if (i->mode == MODE_IMMEDIATE) {
00916             phone_new(i, AST_STATE_RING, i->context);
00917          } else if (i->mode == MODE_DIALTONE) {
00918             ast_mutex_lock(&usecnt_lock);
00919             usecnt++;
00920             ast_mutex_unlock(&usecnt_lock);
00921             ast_update_use_count();
00922             /* Reset the extension */
00923             i->ext[0] = '\0';
00924             /* Play the dialtone */
00925             i->dialtone++;
00926             ioctl(i->fd, PHONE_PLAY_STOP);
00927             ioctl(i->fd, PHONE_PLAY_CODEC, ULAW);
00928             ioctl(i->fd, PHONE_PLAY_START);
00929             i->lastformat = -1;
00930          }
00931       } else {
00932          if (i->dialtone) {
00933             ast_mutex_lock(&usecnt_lock);
00934             usecnt--;
00935             ast_mutex_unlock(&usecnt_lock);
00936             ast_update_use_count();
00937          }
00938          memset(i->ext, 0, sizeof(i->ext));
00939          if (i->cpt)
00940          {
00941             ioctl(i->fd, PHONE_CPT_STOP);
00942             i->cpt = 0;
00943          }
00944          ioctl(i->fd, PHONE_PLAY_STOP);
00945          ioctl(i->fd, PHONE_REC_STOP);
00946          i->dialtone = 0;
00947          i->lastformat = -1;
00948       }
00949    }
00950    if (phonee.bits.pstn_ring) {
00951       ast_verbose("Unit is ringing\n");
00952       phone_new(i, AST_STATE_RING, i->context);
00953    }
00954    if (phonee.bits.caller_id)
00955       ast_verbose("We have caller ID\n");
00956    
00957    
00958 }
00959 
00960 static void *do_monitor(void *data)
00961 {
00962    fd_set rfds, efds;
00963    int n, res;
00964    struct phone_pvt *i;
00965    int tonepos = 0;
00966    /* The tone we're playing this round */
00967    struct timeval tv = {0,0};
00968    int dotone;
00969    /* This thread monitors all the frame relay interfaces which are not yet in use
00970       (and thus do not have a separate thread) indefinitely */
00971    /* From here on out, we die whenever asked */
00972    if (pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL)) {
00973       ast_log(LOG_WARNING, "Unable to set cancel type to asynchronous\n");
00974       return NULL;
00975    }
00976    for(;;) {
00977       /* Don't let anybody kill us right away.  Nobody should lock the interface list
00978          and wait for the monitor list, but the other way around is okay. */
00979       if (ast_mutex_lock(&monlock)) {
00980          ast_log(LOG_ERROR, "Unable to grab monitor lock\n");
00981          return NULL;
00982       }
00983       /* Lock the interface list */
00984       if (ast_mutex_lock(&iflock)) {
00985          ast_log(LOG_ERROR, "Unable to grab interface lock\n");
00986          ast_mutex_unlock(&monlock);
00987          return NULL;
00988       }
00989       /* Build the stuff we're going to select on, that is the socket of every
00990          phone_pvt that does not have an associated owner channel */
00991       n = -1;
00992       FD_ZERO(&rfds);
00993       FD_ZERO(&efds);
00994       i = iflist;
00995       dotone = 0;
00996       while(i) {
00997          if (FD_ISSET(i->fd, &rfds)) 
00998             ast_log(LOG_WARNING, "Descriptor %d appears twice (%s)?\n", i->fd, i->dev);
00999          if (!i->owner) {
01000             /* This needs to be watched, as it lacks an owner */
01001             FD_SET(i->fd, &rfds);
01002             FD_SET(i->fd, &efds);
01003             if (i->fd > n)
01004                n = i->fd;
01005             if (i->dialtone) {
01006                /* Remember we're going to have to come back and play
01007                   more dialtones */
01008                if (ast_tvzero(tv)) {
01009                   /* If we're due for a dialtone, play one */
01010                   if (write(i->fd, DialTone + tonepos, 240) != 240)
01011                      ast_log(LOG_WARNING, "Dial tone write error\n");
01012                }
01013                dotone++;
01014             }
01015          }
01016          
01017          i = i->next;
01018       }
01019       /* Okay, now that we know what to do, release the interface lock */
01020       ast_mutex_unlock(&iflock);
01021 
01022       /* And from now on, we're okay to be killed, so release the monitor lock as well */
01023       ast_mutex_unlock(&monlock);
01024 
01025       /* Wait indefinitely for something to happen */
01026       if (dotone) {
01027          /* If we're ready to recycle the time, set it to 30 ms */
01028          tonepos += 240;
01029          if (tonepos >= sizeof(DialTone))
01030                tonepos = 0;
01031          if (ast_tvzero(tv)) {
01032             tv = ast_tv(30000, 0);
01033          }
01034          res = ast_select(n + 1, &rfds, NULL, &efds, &tv);
01035       } else {
01036          res = ast_select(n + 1, &rfds, NULL, &efds, NULL);
01037          tv = ast_tv(0,0);
01038          tonepos = 0;
01039       }
01040       /* Okay, select has finished.  Let's see what happened.  */
01041       if (res < 0) {
01042          ast_log(LOG_WARNING, "select return %d: %s\n", res, strerror(errno));
01043          continue;
01044       }
01045       /* If there are no fd's changed, just continue, it's probably time
01046          to play some more dialtones */
01047       if (!res)
01048          continue;
01049       /* Alright, lock the interface list again, and let's look and see what has
01050          happened */
01051       if (ast_mutex_lock(&iflock)) {
01052          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01053          continue;
01054       }
01055 
01056       i = iflist;
01057       for(; i; i=i->next) {
01058          if (FD_ISSET(i->fd, &rfds)) {
01059             if (i->owner) {
01060                continue;
01061             }
01062             phone_mini_packet(i);
01063          }
01064          if (FD_ISSET(i->fd, &efds)) {
01065             if (i->owner) {
01066                continue;
01067             }
01068             phone_check_exception(i);
01069          }
01070       }
01071       ast_mutex_unlock(&iflock);
01072    }
01073    /* Never reached */
01074    return NULL;
01075    
01076 }
01077 
01078 static int restart_monitor()
01079 {
01080    /* If we're supposed to be stopped -- stay stopped */
01081    if (monitor_thread == AST_PTHREADT_STOP)
01082       return 0;
01083    if (ast_mutex_lock(&monlock)) {
01084       ast_log(LOG_WARNING, "Unable to lock monitor\n");
01085       return -1;
01086    }
01087    if (monitor_thread == pthread_self()) {
01088       ast_mutex_unlock(&monlock);
01089       ast_log(LOG_WARNING, "Cannot kill myself\n");
01090       return -1;
01091    }
01092    if (monitor_thread != AST_PTHREADT_NULL) {
01093       if (ast_mutex_lock(&iflock)) {
01094         ast_mutex_unlock(&monlock);
01095         ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01096         return -1;
01097       }
01098       /* Wake up the thread */
01099       pthread_cancel(monitor_thread);
01100       ast_mutex_unlock(&iflock);
01101    }
01102    /* Start a new monitor */
01103    if (ast_pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) {
01104       ast_mutex_unlock(&monlock);
01105       ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
01106       return -1;
01107    }
01108    ast_mutex_unlock(&monlock);
01109    return 0;
01110 }
01111 
01112 static struct phone_pvt *mkif(char *iface, int mode, int txgain, int rxgain)
01113 {
01114    /* Make a phone_pvt structure for this interface */
01115    struct phone_pvt *tmp;
01116    int flags;  
01117    
01118    tmp = malloc(sizeof(struct phone_pvt));
01119    if (tmp) {
01120       tmp->fd = open(iface, O_RDWR);
01121       if (tmp->fd < 0) {
01122          ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);
01123          free(tmp);
01124          return NULL;
01125       }
01126       if (mode == MODE_FXO) {
01127          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_PSTN)) 
01128             ast_log(LOG_DEBUG, "Unable to set port to PSTN\n");
01129       } else {
01130          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_POTS)) 
01131              if (mode != MODE_FXS)
01132                   ast_log(LOG_DEBUG, "Unable to set port to POTS\n");
01133       }
01134       ioctl(tmp->fd, PHONE_PLAY_STOP);
01135       ioctl(tmp->fd, PHONE_REC_STOP);
01136       ioctl(tmp->fd, PHONE_RING_STOP);
01137       ioctl(tmp->fd, PHONE_CPT_STOP);
01138       if (ioctl(tmp->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK)) 
01139          ast_log(LOG_DEBUG, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",iface, strerror(errno));
01140       if (echocancel != AEC_OFF)
01141          ioctl(tmp->fd, IXJCTL_AEC_START, echocancel);
01142       if (silencesupression) 
01143          tmp->silencesupression = 1;
01144 #ifdef PHONE_VAD
01145       ioctl(tmp->fd, PHONE_VAD, tmp->silencesupression);
01146 #endif
01147       tmp->mode = mode;
01148       flags = fcntl(tmp->fd, F_GETFL);
01149       fcntl(tmp->fd, F_SETFL, flags | O_NONBLOCK);
01150       tmp->owner = NULL;
01151       tmp->lastformat = -1;
01152       tmp->lastinput = -1;
01153       tmp->ministate = 0;
01154       memset(tmp->ext, 0, sizeof(tmp->ext));
01155       strncpy(tmp->language, language, sizeof(tmp->language)-1);
01156       strncpy(tmp->dev, iface, sizeof(tmp->dev)-1);
01157       strncpy(tmp->context, context, sizeof(tmp->context)-1);
01158       tmp->next = NULL;
01159       tmp->obuflen = 0;
01160       tmp->dialtone = 0;
01161       tmp->cpt = 0;
01162       strncpy(tmp->cid_num, cid_num, sizeof(tmp->cid_num)-1);
01163       strncpy(tmp->cid_name, cid_name, sizeof(tmp->cid_name)-1);
01164       tmp->txgain = txgain;
01165       ioctl(tmp->fd, PHONE_PLAY_VOLUME, tmp->txgain);
01166       tmp->rxgain = rxgain;
01167       ioctl(tmp->fd, PHONE_REC_VOLUME, tmp->rxgain);
01168    }
01169    return tmp;
01170 }
01171 
01172 static struct ast_channel *phone_request(const char *type, int format, void *data, int *cause)
01173 {
01174    int oldformat;
01175    struct phone_pvt *p;
01176    struct ast_channel *tmp = NULL;
01177    char *name = data;
01178 
01179    /* Search for an unowned channel */
01180    if (ast_mutex_lock(&iflock)) {
01181       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01182       return NULL;
01183    }
01184    p = iflist;
01185    while(p) {
01186       if (p->mode == MODE_FXS ||
01187           format & (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) {
01188           size_t length = strlen(p->dev + 5);
01189          if (strncmp(name, p->dev + 5, length) == 0 &&
01190              !isalnum(name[length])) {
01191              if (!p->owner) {
01192                      tmp = phone_new(p, AST_STATE_DOWN, p->context);
01193                      break;
01194                 } else
01195                      *cause = AST_CAUSE_BUSY;
01196             }
01197       }
01198       p = p->next;
01199    }
01200    ast_mutex_unlock(&iflock);
01201    restart_monitor();
01202    if (tmp == NULL) {
01203       oldformat = format;
01204       format &= (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW);
01205       if (!format) {
01206          ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
01207          return NULL;
01208       }
01209    }
01210    return tmp;
01211 }
01212 
01213 /* parse gain value from config file */
01214 static int parse_gain_value(char *gain_type, char *value)
01215 {
01216    float gain;
01217 
01218    /* try to scan number */
01219    if (sscanf(value, "%30f", &gain) != 1)
01220    {
01221       ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n",
01222          value, gain_type, config);
01223       return DEFAULT_GAIN;
01224    }
01225 
01226    /* multiplicate gain by 1.0 gain value */ 
01227    gain = gain * (float)DEFAULT_GAIN;
01228 
01229    /* percentage? */
01230    if (value[strlen(value) - 1] == '%')
01231       return (int)(gain / (float)100);
01232 
01233    return (int)gain;
01234 }
01235 
01236 static int __unload_module(void)
01237 {
01238    struct phone_pvt *p, *pl;
01239    /* First, take us out of the channel loop */
01240    ast_channel_unregister(cur_tech);
01241    if (!ast_mutex_lock(&iflock)) {
01242       /* Hangup all interfaces if they have an owner */
01243       p = iflist;
01244       while(p) {
01245          if (p->owner)
01246             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
01247          p = p->next;
01248       }
01249       iflist = NULL;
01250       ast_mutex_unlock(&iflock);
01251    } else {
01252       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01253       return -1;
01254    }
01255    if (!ast_mutex_lock(&monlock)) {
01256       if (monitor_thread > AST_PTHREADT_NULL) {
01257          pthread_cancel(monitor_thread);
01258          pthread_join(monitor_thread, NULL);
01259       }
01260       monitor_thread = AST_PTHREADT_STOP;
01261       ast_mutex_unlock(&monlock);
01262    } else {
01263       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01264       return -1;
01265    }
01266 
01267    if (!ast_mutex_lock(&iflock)) {
01268       /* Destroy all the interfaces and free their memory */
01269       p = iflist;
01270       while(p) {
01271          /* Close the socket, assuming it's real */
01272          if (p->fd > -1)
01273             close(p->fd);
01274          pl = p;
01275          p = p->next;
01276          /* Free associated memory */
01277          free(pl);
01278       }
01279       iflist = NULL;
01280       ast_mutex_unlock(&iflock);
01281    } else {
01282       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01283       return -1;
01284    }
01285       
01286    return 0;
01287 }
01288 
01289 int unload_module(void)
01290 {
01291    return __unload_module();
01292 }
01293 
01294 int load_module()
01295 {
01296    struct ast_config *cfg;
01297    struct ast_variable *v;
01298    struct phone_pvt *tmp;
01299    int mode = MODE_IMMEDIATE;
01300    int txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; /* default gain 1.0 */
01301    cfg = ast_config_load(config);
01302 
01303    /* We *must* have a config file otherwise stop immediately */
01304    if (!cfg) {
01305       ast_log(LOG_ERROR, "Unable to load config %s\n", config);
01306       return -1;
01307    }
01308    if (ast_mutex_lock(&iflock)) {
01309       /* It's a little silly to lock it, but we mind as well just to be sure */
01310       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01311       return -1;
01312    }
01313    v = ast_variable_browse(cfg, "interfaces");
01314    while(v) {
01315       /* Create the interface list */
01316       if (!strcasecmp(v->name, "device")) {
01317             tmp = mkif(v->value, mode, txgain, rxgain);
01318             if (tmp) {
01319                tmp->next = iflist;
01320                iflist = tmp;
01321                
01322             } else {
01323                ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
01324                ast_config_destroy(cfg);
01325                ast_mutex_unlock(&iflock);
01326                __unload_module();
01327                return -1;
01328             }
01329       } else if (!strcasecmp(v->name, "silencesupression")) {
01330          silencesupression = ast_true(v->value);
01331       } else if (!strcasecmp(v->name, "language")) {
01332          strncpy(language, v->value, sizeof(language)-1);
01333       } else if (!strcasecmp(v->name, "callerid")) {
01334          ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
01335       } else if (!strcasecmp(v->name, "mode")) {
01336          if (!strncasecmp(v->value, "di", 2)) 
01337             mode = MODE_DIALTONE;
01338          else if (!strncasecmp(v->value, "im", 2))
01339             mode = MODE_IMMEDIATE;
01340          else if (!strncasecmp(v->value, "fxs", 3)) {
01341             mode = MODE_FXS;
01342             prefformat = 0x01ff0000; /* All non-voice */
01343          }
01344          else if (!strncasecmp(v->value, "fx", 2))
01345             mode = MODE_FXO;
01346          else
01347             ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
01348       } else if (!strcasecmp(v->name, "context")) {
01349          strncpy(context, v->value, sizeof(context)-1);
01350       } else if (!strcasecmp(v->name, "format")) {
01351          if (!strcasecmp(v->value, "g723.1")) {
01352             prefformat = AST_FORMAT_G723_1;
01353          } else if (!strcasecmp(v->value, "slinear")) {
01354             if (mode == MODE_FXS)
01355                 prefformat |= AST_FORMAT_SLINEAR;
01356             else prefformat = AST_FORMAT_SLINEAR;
01357          } else if (!strcasecmp(v->value, "ulaw")) {
01358             prefformat = AST_FORMAT_ULAW;
01359          } else
01360             ast_log(LOG_WARNING, "Unknown format '%s'\n", v->value);
01361       } else if (!strcasecmp(v->name, "echocancel")) {
01362          if (!strcasecmp(v->value, "off")) {
01363             echocancel = AEC_OFF;
01364          } else if (!strcasecmp(v->value, "low")) {
01365             echocancel = AEC_LOW;
01366          } else if (!strcasecmp(v->value, "medium")) {
01367             echocancel = AEC_MED;
01368          } else if (!strcasecmp(v->value, "high")) {
01369             echocancel = AEC_HIGH;
01370          } else 
01371             ast_log(LOG_WARNING, "Unknown echo cancellation '%s'\n", v->value);
01372       } else if (!strcasecmp(v->name, "txgain")) {
01373          txgain = parse_gain_value(v->name, v->value);
01374       } else if (!strcasecmp(v->name, "rxgain")) {
01375          rxgain = parse_gain_value(v->name, v->value);
01376       }  
01377       v = v->next;
01378    }
01379    ast_mutex_unlock(&iflock);
01380 
01381    if (mode == MODE_FXS) {
01382       phone_tech_fxs.capabilities = prefformat;
01383       cur_tech = &phone_tech_fxs;
01384    } else
01385       cur_tech = (struct ast_channel_tech *) &phone_tech;
01386 
01387    /* Make sure we can register our Adtranphone channel type */
01388 
01389    if (ast_channel_register(cur_tech)) {
01390       ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
01391       ast_config_destroy(cfg);
01392       __unload_module();
01393       return -1;
01394    }
01395    ast_config_destroy(cfg);
01396    /* And start the monitor for the first time */
01397    restart_monitor();
01398    return 0;
01399 }
01400 
01401 int usecount()
01402 {
01403    return usecnt;
01404 }
01405 
01406 char *description()
01407 {
01408    return (char *) desc;
01409 }
01410 
01411 char *key()
01412 {
01413    return ASTERISK_GPL_KEY;
01414 }

Generated on Wed Oct 28 15:47:51 2009 for Asterisk - the Open Source PBX by  doxygen 1.5.6