Wed Apr 6 11:29:42 2011

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: 284597 $")
00035 
00036 #include <ctype.h>
00037 #include <sys/socket.h>
00038 #include <sys/time.h>
00039 #include <arpa/inet.h>
00040 #include <fcntl.h>
00041 #include <sys/ioctl.h>
00042 #include <signal.h>
00043 #ifdef HAVE_LINUX_COMPILER_H
00044 #include <linux/compiler.h>
00045 #endif
00046 #include <linux/telephony.h>
00047 /* Still use some IXJ specific stuff */
00048 #include <linux/version.h>
00049 #include <linux/ixjuser.h>
00050 
00051 #include "asterisk/lock.h"
00052 #include "asterisk/channel.h"
00053 #include "asterisk/config.h"
00054 #include "asterisk/module.h"
00055 #include "asterisk/pbx.h"
00056 #include "asterisk/utils.h"
00057 #include "asterisk/callerid.h"
00058 #include "asterisk/causes.h"
00059 #include "asterisk/stringfields.h"
00060 #include "asterisk/musiconhold.h"
00061 
00062 #include "chan_phone.h"
00063 
00064 #ifdef QTI_PHONEJACK_TJ_PCI   /* check for the newer quicknet driver v.3.1.0 which has this symbol */
00065 #define QNDRV_VER 310
00066 #else
00067 #define QNDRV_VER 100
00068 #endif
00069 
00070 #if QNDRV_VER > 100
00071 #ifdef __linux__
00072 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00073 #else /* FreeBSD and others */
00074 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, x);
00075 #endif /* __linux__ */
00076 #else /* older driver */
00077 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00078 #endif
00079 
00080 #define DEFAULT_CALLER_ID "Unknown"
00081 #define PHONE_MAX_BUF 480
00082 #define DEFAULT_GAIN 0x100
00083 
00084 static const char tdesc[] = "Standard Linux Telephony API Driver";
00085 static const char config[] = "phone.conf";
00086 
00087 /* Default context for dialtone mode */
00088 static char context[AST_MAX_EXTENSION] = "default";
00089 
00090 /* Default language */
00091 static char language[MAX_LANGUAGE] = "";
00092 
00093 static int echocancel = AEC_OFF;
00094 
00095 static int silencesupression = 0;
00096 
00097 static format_t prefformat = AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW;
00098 
00099 /* Protect the interface list (of phone_pvt's) */
00100 AST_MUTEX_DEFINE_STATIC(iflock);
00101 
00102 /* Protect the monitoring thread, so only one process can kill or start it, and not
00103    when it's doing something critical. */
00104 AST_MUTEX_DEFINE_STATIC(monlock);
00105 
00106 /* Boolean value whether the monitoring thread shall continue. */
00107 static unsigned int monitor;
00108    
00109 /* This is the thread for the monitor which checks for input on the channels
00110    which are not currently in use.  */
00111 static pthread_t monitor_thread = AST_PTHREADT_NULL;
00112 
00113 static int restart_monitor(void);
00114 
00115 /* The private structures of the Phone Jack channels are linked for
00116    selecting outgoing channels */
00117    
00118 #define MODE_DIALTONE   1
00119 #define MODE_IMMEDIATE  2
00120 #define MODE_FXO  3
00121 #define MODE_FXS        4
00122 #define MODE_SIGMA      5
00123 
00124 static struct phone_pvt {
00125    int fd;                    /* Raw file descriptor for this device */
00126    struct ast_channel *owner;    /* Channel we belong to, possibly NULL */
00127    int mode;                  /* Is this in the  */
00128    format_t lastformat;            /* Last output format */
00129    format_t lastinput;             /* Last input format */
00130    int ministate;             /* Miniature state, for dialtone mode */
00131    char dev[256];             /* Device name */
00132    struct phone_pvt *next;       /* Next channel in list */
00133    struct ast_frame fr;       /* Frame */
00134    char offset[AST_FRIENDLY_OFFSET];
00135    char buf[PHONE_MAX_BUF];               /* Static buffer for reading frames */
00136    int obuflen;
00137    int dialtone;
00138    int txgain, rxgain;             /* gain control for playing, recording  */
00139                            /* 0x100 - 1.0, 0x200 - 2.0, 0x80 - 0.5 */
00140    int cpt;                /* Call Progress Tone playing? */
00141    int silencesupression;
00142    char context[AST_MAX_EXTENSION];
00143    char obuf[PHONE_MAX_BUF * 2];
00144    char ext[AST_MAX_EXTENSION];
00145    char language[MAX_LANGUAGE];
00146    char cid_num[AST_MAX_EXTENSION];
00147    char cid_name[AST_MAX_EXTENSION];
00148 } *iflist = NULL;
00149 
00150 static char cid_num[AST_MAX_EXTENSION];
00151 static char cid_name[AST_MAX_EXTENSION];
00152 
00153 static struct ast_channel *phone_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause);
00154 static int phone_digit_begin(struct ast_channel *ast, char digit);
00155 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00156 static int phone_call(struct ast_channel *ast, char *dest, int timeout);
00157 static int phone_hangup(struct ast_channel *ast);
00158 static int phone_answer(struct ast_channel *ast);
00159 static struct ast_frame *phone_read(struct ast_channel *ast);
00160 static int phone_write(struct ast_channel *ast, struct ast_frame *frame);
00161 static struct ast_frame *phone_exception(struct ast_channel *ast);
00162 static int phone_send_text(struct ast_channel *ast, const char *text);
00163 static int phone_fixup(struct ast_channel *old, struct ast_channel *new);
00164 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen);
00165 
00166 static const struct ast_channel_tech phone_tech = {
00167    .type = "Phone",
00168    .description = tdesc,
00169    .capabilities = AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW | AST_FORMAT_G729A,
00170    .requester = phone_request,
00171    .send_digit_begin = phone_digit_begin,
00172    .send_digit_end = phone_digit_end,
00173    .call = phone_call,
00174    .hangup = phone_hangup,
00175    .answer = phone_answer,
00176    .read = phone_read,
00177    .write = phone_write,
00178    .exception = phone_exception,
00179    .indicate = phone_indicate,
00180    .fixup = phone_fixup
00181 };
00182 
00183 static struct ast_channel_tech phone_tech_fxs = {
00184    .type = "Phone",
00185    .description = tdesc,
00186    .requester = phone_request,
00187    .send_digit_begin = phone_digit_begin,
00188    .send_digit_end = phone_digit_end,
00189    .call = phone_call,
00190    .hangup = phone_hangup,
00191    .answer = phone_answer,
00192    .read = phone_read,
00193    .write = phone_write,
00194    .exception = phone_exception,
00195    .write_video = phone_write,
00196    .send_text = phone_send_text,
00197    .indicate = phone_indicate,
00198    .fixup = phone_fixup
00199 };
00200 
00201 static struct ast_channel_tech *cur_tech;
00202 
00203 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen)
00204 {
00205    struct phone_pvt *p = chan->tech_pvt;
00206    int res=-1;
00207    ast_debug(1, "Requested indication %d on channel %s\n", condition, chan->name);
00208    switch(condition) {
00209    case AST_CONTROL_FLASH:
00210       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00211       usleep(320000);
00212       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00213          p->lastformat = -1;
00214          res = 0;
00215          break;
00216    case AST_CONTROL_HOLD:
00217       ast_moh_start(chan, data, NULL);
00218       break;
00219    case AST_CONTROL_UNHOLD:
00220       ast_moh_stop(chan);
00221       break;
00222    case AST_CONTROL_SRCUPDATE:
00223       res = 0;
00224       break;
00225    default:
00226       ast_log(LOG_WARNING, "Condition %d is not supported on channel %s\n", condition, chan->name);
00227    }
00228    return res;
00229 }
00230 
00231 static int phone_fixup(struct ast_channel *old, struct ast_channel *new)
00232 {
00233    struct phone_pvt *pvt = old->tech_pvt;
00234    if (pvt && pvt->owner == old)
00235       pvt->owner = new;
00236    return 0;
00237 }
00238 
00239 static int phone_digit_begin(struct ast_channel *chan, char digit)
00240 {
00241    /* XXX Modify this callback to let Asterisk support controlling the length of DTMF */
00242    return 0;
00243 }
00244 
00245 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
00246 {
00247    struct phone_pvt *p;
00248    int outdigit;
00249    p = ast->tech_pvt;
00250    ast_debug(1, "Dialed %c\n", digit);
00251    switch(digit) {
00252    case '0':
00253    case '1':
00254    case '2':
00255    case '3':
00256    case '4':
00257    case '5':
00258    case '6':
00259    case '7':
00260    case '8':
00261    case '9':
00262       outdigit = digit - '0';
00263       break;
00264    case '*':
00265       outdigit = 11;
00266       break;
00267    case '#':
00268       outdigit = 12;
00269       break;
00270    case 'f':   /*flash*/
00271    case 'F':
00272       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00273       usleep(320000);
00274       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00275       p->lastformat = -1;
00276       return 0;
00277    default:
00278       ast_log(LOG_WARNING, "Unknown digit '%c'\n", digit);
00279       return -1;
00280    }
00281    ast_debug(1, "Dialed %d\n", outdigit);
00282    ioctl(p->fd, PHONE_PLAY_TONE, outdigit);
00283    p->lastformat = -1;
00284    return 0;
00285 }
00286 
00287 static int phone_call(struct ast_channel *ast, char *dest, int timeout)
00288 {
00289    struct phone_pvt *p;
00290 
00291    PHONE_CID cid;
00292    struct timeval UtcTime = ast_tvnow();
00293    struct ast_tm tm;
00294    int start;
00295 
00296    ast_localtime(&UtcTime, &tm, NULL);
00297 
00298    memset(&cid, 0, sizeof(PHONE_CID));
00299    if(&tm != NULL) {
00300       snprintf(cid.month, sizeof(cid.month), "%02d",(tm.tm_mon + 1));
00301       snprintf(cid.day, sizeof(cid.day),     "%02d", tm.tm_mday);
00302       snprintf(cid.hour, sizeof(cid.hour),   "%02d", tm.tm_hour);
00303       snprintf(cid.min, sizeof(cid.min),     "%02d", tm.tm_min);
00304    }
00305    /* the standard format of ast->callerid is:  "name" <number>, but not always complete */
00306    if (!ast->connected.id.name.valid
00307       || ast_strlen_zero(ast->connected.id.name.str)) {
00308       strcpy(cid.name, DEFAULT_CALLER_ID);
00309    } else {
00310       ast_copy_string(cid.name, ast->connected.id.name.str, sizeof(cid.name));
00311    }
00312 
00313    if (ast->connected.id.number.valid && ast->connected.id.number.str) {
00314       ast_copy_string(cid.number, ast->connected.id.number.str, sizeof(cid.number));
00315    }
00316 
00317    p = ast->tech_pvt;
00318 
00319    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
00320       ast_log(LOG_WARNING, "phone_call called on %s, neither down nor reserved\n", ast->name);
00321       return -1;
00322    }
00323    ast_debug(1, "Ringing %s on %s (%d)\n", dest, ast->name, ast->fds[0]);
00324 
00325    start = IXJ_PHONE_RING_START(cid);
00326    if (start == -1)
00327       return -1;
00328    
00329    if (p->mode == MODE_FXS) {
00330       char *digit = strchr(dest, '/');
00331       if (digit)
00332       {
00333         digit++;
00334         while (*digit)
00335           phone_digit_end(ast, *digit++, 0);
00336       }
00337    }
00338  
00339    ast_setstate(ast, AST_STATE_RINGING);
00340    ast_queue_control(ast, AST_CONTROL_RINGING);
00341    return 0;
00342 }
00343 
00344 static int phone_hangup(struct ast_channel *ast)
00345 {
00346    struct phone_pvt *p;
00347    p = ast->tech_pvt;
00348    ast_debug(1, "phone_hangup(%s)\n", ast->name);
00349    if (!ast->tech_pvt) {
00350       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00351       return 0;
00352    }
00353    /* XXX Is there anything we can do to really hang up except stop recording? */
00354    ast_setstate(ast, AST_STATE_DOWN);
00355    if (ioctl(p->fd, PHONE_REC_STOP))
00356       ast_log(LOG_WARNING, "Failed to stop recording\n");
00357    if (ioctl(p->fd, PHONE_PLAY_STOP))
00358       ast_log(LOG_WARNING, "Failed to stop playing\n");
00359    if (ioctl(p->fd, PHONE_RING_STOP))
00360       ast_log(LOG_WARNING, "Failed to stop ringing\n");
00361    if (ioctl(p->fd, PHONE_CPT_STOP))
00362       ast_log(LOG_WARNING, "Failed to stop sounds\n");
00363 
00364    /* If it's an FXO, hang them up */
00365    if (p->mode == MODE_FXO) {
00366       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
00367          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",ast->name, strerror(errno));
00368    }
00369 
00370    /* If they're off hook, give a busy signal */
00371    if (ioctl(p->fd, PHONE_HOOKSTATE)) {
00372       ast_debug(1, "Got hunghup, giving busy signal\n");
00373       ioctl(p->fd, PHONE_BUSY);
00374       p->cpt = 1;
00375    }
00376    p->lastformat = -1;
00377    p->lastinput = -1;
00378    p->ministate = 0;
00379    p->obuflen = 0;
00380    p->dialtone = 0;
00381    memset(p->ext, 0, sizeof(p->ext));
00382    ((struct phone_pvt *)(ast->tech_pvt))->owner = NULL;
00383    ast_module_unref(ast_module_info->self);
00384    ast_verb(3, "Hungup '%s'\n", ast->name);
00385    ast->tech_pvt = NULL;
00386    ast_setstate(ast, AST_STATE_DOWN);
00387    restart_monitor();
00388    return 0;
00389 }
00390 
00391 static int phone_setup(struct ast_channel *ast)
00392 {
00393    struct phone_pvt *p;
00394    p = ast->tech_pvt;
00395    ioctl(p->fd, PHONE_CPT_STOP);
00396    /* Nothing to answering really, just start recording */
00397    if (ast->rawreadformat == AST_FORMAT_G729A) {
00398       /* Prefer g729 */
00399       ioctl(p->fd, PHONE_REC_STOP);
00400       if (p->lastinput != AST_FORMAT_G729A) {
00401          p->lastinput = AST_FORMAT_G729A;
00402          if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
00403             ast_log(LOG_WARNING, "Failed to set codec to g729\n");
00404             return -1;
00405          }
00406       }
00407         } else if (ast->rawreadformat == AST_FORMAT_G723_1) {
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 %s\n", 
00440                ast_getformatname(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_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n", ast->name, strerror(errno));
00466       else
00467          ast_debug(1, "Took linejack off hook\n");
00468    }
00469    phone_setup(ast);
00470    ast_debug(1, "phone_answer(%s)\n", ast->name);
00471    ast->rings = 0;
00472    ast_setstate(ast, AST_STATE_UP);
00473    return 0;
00474 }
00475 
00476 #if 0
00477 static char phone_2digit(char c)
00478 {
00479    if (c == 12)
00480       return '#';
00481    else if (c == 11)
00482       return '*';
00483    else if ((c < 10) && (c >= 0))
00484       return '0' + c - 1;
00485    else
00486       return '?';
00487 }
00488 #endif
00489 
00490 static struct ast_frame  *phone_exception(struct ast_channel *ast)
00491 {
00492    int res;
00493    union telephony_exception phonee;
00494    struct phone_pvt *p = ast->tech_pvt;
00495    char digit;
00496 
00497    /* Some nice norms */
00498    p->fr.datalen = 0;
00499    p->fr.samples = 0;
00500    p->fr.data.ptr =  NULL;
00501    p->fr.src = "Phone";
00502    p->fr.offset = 0;
00503    p->fr.mallocd=0;
00504    p->fr.delivery = ast_tv(0,0);
00505    
00506    phonee.bytes = ioctl(p->fd, PHONE_EXCEPTION);
00507    if (phonee.bits.dtmf_ready)  {
00508       ast_debug(1, "phone_exception(): DTMF\n");
00509    
00510       /* We've got a digit -- Just handle this nicely and easily */
00511       digit =  ioctl(p->fd, PHONE_GET_DTMF_ASCII);
00512       p->fr.subclass.integer = digit;
00513       p->fr.frametype = AST_FRAME_DTMF;
00514       return &p->fr;
00515    }
00516    if (phonee.bits.hookstate) {
00517       ast_debug(1, "Hookstate changed\n");
00518       res = ioctl(p->fd, PHONE_HOOKSTATE);
00519       /* See if we've gone on hook, if so, notify by returning NULL */
00520       ast_debug(1, "New hookstate: %d\n", res);
00521       if (!res && (p->mode != MODE_FXO))
00522          return NULL;
00523       else {
00524          if (ast->_state == AST_STATE_RINGING) {
00525             /* They've picked up the phone */
00526             p->fr.frametype = AST_FRAME_CONTROL;
00527             p->fr.subclass.integer = AST_CONTROL_ANSWER;
00528             phone_setup(ast);
00529             ast_setstate(ast, AST_STATE_UP);
00530             return &p->fr;
00531          }  else 
00532             ast_log(LOG_WARNING, "Got off hook in weird state %d\n", ast->_state);
00533       }
00534    }
00535 #if 1
00536    if (phonee.bits.pstn_ring)
00537       ast_verbose("Unit is ringing\n");
00538    if (phonee.bits.caller_id) {
00539       ast_verbose("We have caller ID\n");
00540    }
00541    if (phonee.bits.pstn_wink)
00542       ast_verbose("Detected Wink\n");
00543 #endif
00544    /* Strange -- nothing there.. */
00545    p->fr.frametype = AST_FRAME_NULL;
00546    p->fr.subclass.integer = 0;
00547    return &p->fr;
00548 }
00549 
00550 static struct ast_frame  *phone_read(struct ast_channel *ast)
00551 {
00552    int res;
00553    struct phone_pvt *p = ast->tech_pvt;
00554    
00555 
00556    /* Some nice norms */
00557    p->fr.datalen = 0;
00558    p->fr.samples = 0;
00559    p->fr.data.ptr =  NULL;
00560    p->fr.src = "Phone";
00561    p->fr.offset = 0;
00562    p->fr.mallocd=0;
00563    p->fr.delivery = ast_tv(0,0);
00564 
00565    /* Try to read some data... */
00566    CHECK_BLOCKING(ast);
00567    res = read(p->fd, p->buf, PHONE_MAX_BUF);
00568    ast_clear_flag(ast, AST_FLAG_BLOCKING);
00569    if (res < 0) {
00570 #if 0
00571       if (errno == EAGAIN) {
00572          ast_log(LOG_WARNING, "Null frame received\n");
00573          p->fr.frametype = AST_FRAME_NULL;
00574          p->fr.subclass = 0;
00575          return &p->fr;
00576       }
00577 #endif
00578       ast_log(LOG_WARNING, "Error reading: %s\n", strerror(errno));
00579       return NULL;
00580    }
00581    p->fr.data.ptr = p->buf;
00582    if (p->mode != MODE_FXS)
00583    switch(p->buf[0] & 0x3) {
00584    case '0':
00585    case '1':
00586       /* Normal */
00587       break;
00588    case '2':
00589    case '3':
00590       /* VAD/CNG, only send two words */
00591       res = 4;
00592       break;
00593    }
00594    p->fr.samples = 240;
00595    p->fr.datalen = res;
00596    p->fr.frametype = p->lastinput <= AST_FORMAT_AUDIO_MASK ?
00597                           AST_FRAME_VOICE : 
00598            p->lastinput <= AST_FORMAT_PNG ? AST_FRAME_IMAGE 
00599            : AST_FRAME_VIDEO;
00600    p->fr.subclass.codec = p->lastinput;
00601    p->fr.offset = AST_FRIENDLY_OFFSET;
00602    /* Byteswap from little-endian to native-endian */
00603    if (p->fr.subclass.codec == AST_FORMAT_SLINEAR)
00604       ast_frame_byteswap_le(&p->fr);
00605    return &p->fr;
00606 }
00607 
00608 static int phone_write_buf(struct phone_pvt *p, const char *buf, int len, int frlen, int swap)
00609 {
00610    int res;
00611    /* Store as much of the buffer as we can, then write fixed frames */
00612    int space = sizeof(p->obuf) - p->obuflen;
00613    /* Make sure we have enough buffer space to store the frame */
00614    if (space < len)
00615       len = space;
00616    if (swap)
00617       ast_swapcopy_samples(p->obuf+p->obuflen, buf, len/2);
00618    else
00619       memcpy(p->obuf + p->obuflen, buf, len);
00620    p->obuflen += len;
00621    while(p->obuflen > frlen) {
00622       res = write(p->fd, p->obuf, frlen);
00623       if (res != frlen) {
00624          if (res < 1) {
00625 /*
00626  * Card is in non-blocking mode now and it works well now, but there are
00627  * lot of messages like this. So, this message is temporarily disabled.
00628  */
00629             return 0;
00630          } else {
00631             ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frlen);
00632          }
00633       }
00634       p->obuflen -= frlen;
00635       /* Move memory if necessary */
00636       if (p->obuflen) 
00637          memmove(p->obuf, p->obuf + frlen, p->obuflen);
00638    }
00639    return len;
00640 }
00641 
00642 static int phone_send_text(struct ast_channel *ast, const char *text)
00643 {
00644     int length = strlen(text);
00645     return phone_write_buf(ast->tech_pvt, text, length, length, 0) == 
00646            length ? 0 : -1;
00647 }
00648 
00649 static int phone_write(struct ast_channel *ast, struct ast_frame *frame)
00650 {
00651    struct phone_pvt *p = ast->tech_pvt;
00652    int res;
00653    int maxfr=0;
00654    char *pos;
00655    int sofar;
00656    int expected;
00657    int codecset = 0;
00658    char tmpbuf[4];
00659    /* Write a frame of (presumably voice) data */
00660    if (frame->frametype != AST_FRAME_VOICE && p->mode != MODE_FXS) {
00661       if (frame->frametype != AST_FRAME_IMAGE)
00662          ast_log(LOG_WARNING, "Don't know what to do with  frame type '%d'\n", frame->frametype);
00663       return 0;
00664    }
00665    if (!(frame->subclass.codec &
00666       (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW | AST_FORMAT_G729A)) && 
00667        p->mode != MODE_FXS) {
00668       ast_log(LOG_WARNING, "Cannot handle frames in %s format\n", ast_getformatname(frame->subclass.codec));
00669       return -1;
00670    }
00671 #if 0
00672    /* If we're not in up mode, go into up mode now */
00673    if (ast->_state != AST_STATE_UP) {
00674       ast_setstate(ast, AST_STATE_UP);
00675       phone_setup(ast);
00676    }
00677 #else
00678    if (ast->_state != AST_STATE_UP) {
00679       /* Don't try tos end audio on-hook */
00680       return 0;
00681    }
00682 #endif   
00683    if (frame->subclass.codec == AST_FORMAT_G729A) {
00684       if (p->lastformat != AST_FORMAT_G729A) {
00685          ioctl(p->fd, PHONE_PLAY_STOP);
00686          ioctl(p->fd, PHONE_REC_STOP);
00687          if (ioctl(p->fd, PHONE_PLAY_CODEC, G729)) {
00688             ast_log(LOG_WARNING, "Unable to set G729 mode\n");
00689             return -1;
00690          }
00691          if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
00692             ast_log(LOG_WARNING, "Unable to set G729 mode\n");
00693             return -1;
00694          }
00695          p->lastformat = AST_FORMAT_G729A;
00696          p->lastinput = AST_FORMAT_G729A;
00697          /* Reset output buffer */
00698          p->obuflen = 0;
00699          codecset = 1;
00700       }
00701       if (frame->datalen > 80) {
00702          ast_log(LOG_WARNING, "Frame size too large for G.729 (%d bytes)\n", frame->datalen);
00703          return -1;
00704       }
00705       maxfr = 80;
00706         } else if (frame->subclass.codec == AST_FORMAT_G723_1) {
00707       if (p->lastformat != AST_FORMAT_G723_1) {
00708          ioctl(p->fd, PHONE_PLAY_STOP);
00709          ioctl(p->fd, PHONE_REC_STOP);
00710          if (ioctl(p->fd, PHONE_PLAY_CODEC, G723_63)) {
00711             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00712             return -1;
00713          }
00714          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00715             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00716             return -1;
00717          }
00718          p->lastformat = AST_FORMAT_G723_1;
00719          p->lastinput = AST_FORMAT_G723_1;
00720          /* Reset output buffer */
00721          p->obuflen = 0;
00722          codecset = 1;
00723       }
00724       if (frame->datalen > 24) {
00725          ast_log(LOG_WARNING, "Frame size too large for G.723.1 (%d bytes)\n", frame->datalen);
00726          return -1;
00727       }
00728       maxfr = 24;
00729    } else if (frame->subclass.codec == AST_FORMAT_SLINEAR) {
00730       if (p->lastformat != AST_FORMAT_SLINEAR) {
00731          ioctl(p->fd, PHONE_PLAY_STOP);
00732          ioctl(p->fd, PHONE_REC_STOP);
00733          if (ioctl(p->fd, PHONE_PLAY_CODEC, LINEAR16)) {
00734             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00735             return -1;
00736          }
00737          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00738             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00739             return -1;
00740          }
00741          p->lastformat = AST_FORMAT_SLINEAR;
00742          p->lastinput = AST_FORMAT_SLINEAR;
00743          codecset = 1;
00744          /* Reset output buffer */
00745          p->obuflen = 0;
00746       }
00747       maxfr = 480;
00748    } else if (frame->subclass.codec == AST_FORMAT_ULAW) {
00749       if (p->lastformat != AST_FORMAT_ULAW) {
00750          ioctl(p->fd, PHONE_PLAY_STOP);
00751          ioctl(p->fd, PHONE_REC_STOP);
00752          if (ioctl(p->fd, PHONE_PLAY_CODEC, ULAW)) {
00753             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00754             return -1;
00755          }
00756          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00757             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00758             return -1;
00759          }
00760          p->lastformat = AST_FORMAT_ULAW;
00761          p->lastinput = AST_FORMAT_ULAW;
00762          codecset = 1;
00763          /* Reset output buffer */
00764          p->obuflen = 0;
00765       }
00766       maxfr = 240;
00767    } else {
00768       if (p->lastformat != frame->subclass.codec) {
00769          ioctl(p->fd, PHONE_PLAY_STOP);
00770          ioctl(p->fd, PHONE_REC_STOP);
00771          if (ioctl(p->fd, PHONE_PLAY_CODEC, (int) frame->subclass.codec)) {
00772             ast_log(LOG_WARNING, "Unable to set %s mode\n",
00773                ast_getformatname(frame->subclass.codec));
00774             return -1;
00775          }
00776          if (ioctl(p->fd, PHONE_REC_CODEC, (int) frame->subclass.codec)) {
00777             ast_log(LOG_WARNING, "Unable to set %s mode\n",
00778                ast_getformatname(frame->subclass.codec));
00779             return -1;
00780          }
00781          p->lastformat = frame->subclass.codec;
00782          p->lastinput = frame->subclass.codec;
00783          codecset = 1;
00784          /* Reset output buffer */
00785          p->obuflen = 0;
00786       }
00787       maxfr = 480;
00788    }
00789    if (codecset) {
00790       ioctl(p->fd, PHONE_REC_DEPTH, 3);
00791       ioctl(p->fd, PHONE_PLAY_DEPTH, 3);
00792       if (ioctl(p->fd, PHONE_PLAY_START)) {
00793          ast_log(LOG_WARNING, "Failed to start playback\n");
00794          return -1;
00795       }
00796       if (ioctl(p->fd, PHONE_REC_START)) {
00797          ast_log(LOG_WARNING, "Failed to start recording\n");
00798          return -1;
00799       }
00800    }
00801    /* If we get here, we have a frame of Appropriate data */
00802    sofar = 0;
00803    pos = frame->data.ptr;
00804    while(sofar < frame->datalen) {
00805       /* Write in no more than maxfr sized frames */
00806       expected = frame->datalen - sofar;
00807       if (maxfr < expected)
00808          expected = maxfr;
00809       /* XXX Internet Phone Jack does not handle the 4-byte VAD frame properly! XXX 
00810          we have to pad it to 24 bytes still.  */
00811       if (frame->datalen == 4) {
00812          if (p->silencesupression) {
00813             memcpy(tmpbuf, frame->data.ptr, 4);
00814             expected = 24;
00815             res = phone_write_buf(p, tmpbuf, expected, maxfr, 0);
00816          }
00817          res = 4;
00818          expected=4;
00819       } else {
00820          int swap = 0;
00821 #if __BYTE_ORDER == __BIG_ENDIAN
00822          if (frame->subclass.codec == AST_FORMAT_SLINEAR)
00823             swap = 1; /* Swap big-endian samples to little-endian as we copy */
00824 #endif
00825          res = phone_write_buf(p, pos, expected, maxfr, swap);
00826       }
00827       if (res != expected) {
00828          if ((errno != EAGAIN) && (errno != EINTR)) {
00829             if (res < 0) 
00830                ast_log(LOG_WARNING, "Write returned error (%s)\n", strerror(errno));
00831    /*
00832     * Card is in non-blocking mode now and it works well now, but there are
00833     * lot of messages like this. So, this message is temporarily disabled.
00834     */
00835 #if 0
00836             else
00837                ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frame->datalen);
00838 #endif
00839             return -1;
00840          } else /* Pretend it worked */
00841             res = expected;
00842       }
00843       sofar += res;
00844       pos += res;
00845    }
00846    return 0;
00847 }
00848 
00849 static struct ast_channel *phone_new(struct phone_pvt *i, int state, char *cntx, const char *linkedid)
00850 {
00851    struct ast_channel *tmp;
00852    struct phone_codec_data queried_codec;
00853    tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "", i->ext, i->context, linkedid, 0, "Phone/%s", i->dev + 5);
00854    if (tmp) {
00855       tmp->tech = cur_tech;
00856       ast_channel_set_fd(tmp, 0, i->fd);
00857       /* XXX Switching formats silently causes kernel panics XXX */
00858       if (i->mode == MODE_FXS &&
00859           ioctl(i->fd, PHONE_QUERY_CODEC, &queried_codec) == 0) {
00860          if (queried_codec.type == LINEAR16)
00861             tmp->nativeformats =
00862             tmp->rawreadformat =
00863             tmp->rawwriteformat =
00864             AST_FORMAT_SLINEAR;
00865          else {
00866             tmp->nativeformats =
00867             tmp->rawreadformat =
00868             tmp->rawwriteformat =
00869             prefformat & ~AST_FORMAT_SLINEAR;
00870          }
00871       }
00872       else {
00873          tmp->nativeformats = prefformat;
00874          tmp->rawreadformat = prefformat;
00875          tmp->rawwriteformat = prefformat;
00876       }
00877       /* no need to call ast_setstate: the channel_alloc already did its job */
00878       if (state == AST_STATE_RING)
00879          tmp->rings = 1;
00880       tmp->tech_pvt = i;
00881       ast_copy_string(tmp->context, cntx, sizeof(tmp->context));
00882       if (!ast_strlen_zero(i->ext))
00883          ast_copy_string(tmp->exten, i->ext, sizeof(tmp->exten));
00884       else
00885          strcpy(tmp->exten, "s");
00886       if (!ast_strlen_zero(i->language))
00887          ast_string_field_set(tmp, language, i->language);
00888 
00889       /* Don't use ast_set_callerid() here because it will
00890        * generate a NewCallerID event before the NewChannel event */
00891       if (!ast_strlen_zero(i->cid_num)) {
00892          tmp->caller.ani.number.valid = 1;
00893          tmp->caller.ani.number.str = ast_strdup(i->cid_num);
00894       }
00895 
00896       i->owner = tmp;
00897       ast_module_ref(ast_module_info->self);
00898       if (state != AST_STATE_DOWN) {
00899          if (state == AST_STATE_RING) {
00900             ioctl(tmp->fds[0], PHONE_RINGBACK);
00901             i->cpt = 1;
00902          }
00903          if (ast_pbx_start(tmp)) {
00904             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00905             ast_hangup(tmp);
00906          }
00907       }
00908    } else
00909       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
00910    return tmp;
00911 }
00912 
00913 static void phone_mini_packet(struct phone_pvt *i)
00914 {
00915    int res;
00916    char buf[1024];
00917    /* Ignore stuff we read... */
00918    res = read(i->fd, buf, sizeof(buf));
00919    if (res < 1) {
00920       ast_log(LOG_WARNING, "Read returned %d: %s\n", res, strerror(errno));
00921       return;
00922    }
00923 }
00924 
00925 static void phone_check_exception(struct phone_pvt *i)
00926 {
00927    int offhook=0;
00928    char digit[2] = {0 , 0};
00929    union telephony_exception phonee;
00930    /* XXX Do something XXX */
00931 #if 0
00932    ast_debug(1, "Exception!\n");
00933 #endif
00934    phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION);
00935    if (phonee.bits.dtmf_ready)  {
00936       digit[0] = ioctl(i->fd, PHONE_GET_DTMF_ASCII);
00937       if (i->mode == MODE_DIALTONE || i->mode == MODE_FXS || i->mode == MODE_SIGMA) {
00938          ioctl(i->fd, PHONE_PLAY_STOP);
00939          ioctl(i->fd, PHONE_REC_STOP);
00940          ioctl(i->fd, PHONE_CPT_STOP);
00941          i->dialtone = 0;
00942          if (strlen(i->ext) < AST_MAX_EXTENSION - 1)
00943             strncat(i->ext, digit, sizeof(i->ext) - strlen(i->ext) - 1);
00944          if ((i->mode != MODE_FXS ||
00945               !(phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION)) ||
00946               !phonee.bits.dtmf_ready) &&
00947              ast_exists_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00948             /* It's a valid extension in its context, get moving! */
00949             phone_new(i, AST_STATE_RING, i->context, NULL);
00950             /* No need to restart monitor, we are the monitor */
00951          } else if (!ast_canmatch_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00952             /* There is nothing in the specified extension that can match anymore.
00953                Try the default */
00954             if (ast_exists_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00955                /* Check the default, too... */
00956                phone_new(i, AST_STATE_RING, "default", NULL);
00957                /* XXX This should probably be justified better XXX */
00958             }  else if (!ast_canmatch_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00959                /* It's not a valid extension, give a busy signal */
00960                ast_debug(1, "%s can't match anything in %s or default\n", i->ext, i->context);
00961                ioctl(i->fd, PHONE_BUSY);
00962                i->cpt = 1;
00963             }
00964          }
00965 #if 0
00966          ast_verbose("Extension is %s\n", i->ext);
00967 #endif
00968       }
00969    }
00970    if (phonee.bits.hookstate) {
00971       offhook = ioctl(i->fd, PHONE_HOOKSTATE);
00972       if (offhook) {
00973          if (i->mode == MODE_IMMEDIATE) {
00974             phone_new(i, AST_STATE_RING, i->context, NULL);
00975          } else if (i->mode == MODE_DIALTONE) {
00976             ast_module_ref(ast_module_info->self);
00977             /* Reset the extension */
00978             i->ext[0] = '\0';
00979             /* Play the dialtone */
00980             i->dialtone++;
00981             ioctl(i->fd, PHONE_PLAY_STOP);
00982             ioctl(i->fd, PHONE_PLAY_CODEC, ULAW);
00983             ioctl(i->fd, PHONE_PLAY_START);
00984             i->lastformat = -1;
00985          } else if (i->mode == MODE_SIGMA) {
00986             ast_module_ref(ast_module_info->self);
00987             /* Reset the extension */
00988             i->ext[0] = '\0';
00989             /* Play the dialtone */
00990             i->dialtone++;
00991             ioctl(i->fd, PHONE_DIALTONE);
00992          }
00993       } else {
00994          if (i->dialtone)
00995             ast_module_unref(ast_module_info->self);
00996          memset(i->ext, 0, sizeof(i->ext));
00997          if (i->cpt)
00998          {
00999             ioctl(i->fd, PHONE_CPT_STOP);
01000             i->cpt = 0;
01001          }
01002          ioctl(i->fd, PHONE_PLAY_STOP);
01003          ioctl(i->fd, PHONE_REC_STOP);
01004          i->dialtone = 0;
01005          i->lastformat = -1;
01006       }
01007    }
01008    if (phonee.bits.pstn_ring) {
01009       ast_verbose("Unit is ringing\n");
01010       phone_new(i, AST_STATE_RING, i->context, NULL);
01011    }
01012    if (phonee.bits.caller_id)
01013       ast_verbose("We have caller ID\n");
01014    
01015    
01016 }
01017 
01018 static void *do_monitor(void *data)
01019 {
01020    struct pollfd *fds = NULL;
01021    int nfds = 0, inuse_fds = 0, res;
01022    struct phone_pvt *i;
01023    int tonepos = 0;
01024    /* The tone we're playing this round */
01025    struct timeval tv = { 0, 0 };
01026    int dotone;
01027    /* This thread monitors all the frame relay interfaces which are not yet in use
01028       (and thus do not have a separate thread) indefinitely */
01029    while (monitor) {
01030       /* Don't let anybody kill us right away.  Nobody should lock the interface list
01031          and wait for the monitor list, but the other way around is okay. */
01032       /* Lock the interface list */
01033       if (ast_mutex_lock(&iflock)) {
01034          ast_log(LOG_ERROR, "Unable to grab interface lock\n");
01035          return NULL;
01036       }
01037       /* Build the stuff we're going to select on, that is the socket of every
01038          phone_pvt that does not have an associated owner channel */
01039       i = iflist;
01040       dotone = 0;
01041       inuse_fds = 0;
01042       for (i = iflist; i; i = i->next) {
01043          if (!i->owner) {
01044             /* This needs to be watched, as it lacks an owner */
01045             if (inuse_fds == nfds) {
01046                void *tmp = ast_realloc(fds, (nfds + 1) * sizeof(*fds));
01047                if (!tmp) {
01048                   /* Avoid leaking */
01049                   continue;
01050                }
01051                fds = tmp;
01052                nfds++;
01053             }
01054             fds[inuse_fds].fd = i->fd;
01055             fds[inuse_fds].events = POLLIN | POLLERR;
01056             fds[inuse_fds].revents = 0;
01057             inuse_fds++;
01058 
01059             if (i->dialtone && i->mode != MODE_SIGMA) {
01060                /* Remember we're going to have to come back and play
01061                   more dialtones */
01062                if (ast_tvzero(tv)) {
01063                   /* If we're due for a dialtone, play one */
01064                   if (write(i->fd, DialTone + tonepos, 240) != 240) {
01065                      ast_log(LOG_WARNING, "Dial tone write error\n");
01066                   }
01067                }
01068                dotone++;
01069             }
01070          }
01071       }
01072       /* Okay, now that we know what to do, release the interface lock */
01073       ast_mutex_unlock(&iflock);
01074 
01075       /* Wait indefinitely for something to happen */
01076       if (dotone && i && i->mode != MODE_SIGMA) {
01077          /* If we're ready to recycle the time, set it to 30 ms */
01078          tonepos += 240;
01079          if (tonepos >= sizeof(DialTone)) {
01080             tonepos = 0;
01081          }
01082          if (ast_tvzero(tv)) {
01083             tv = ast_tv(0, 30000);
01084          }
01085          res = ast_poll2(fds, inuse_fds, &tv);
01086       } else {
01087          res = ast_poll(fds, inuse_fds, -1);
01088          tv = ast_tv(0, 0);
01089          tonepos = 0;
01090       }
01091       /* Okay, select has finished.  Let's see what happened.  */
01092       if (res < 0) {
01093          ast_debug(1, "poll returned %d: %s\n", res, strerror(errno));
01094          continue;
01095       }
01096       /* If there are no fd's changed, just continue, it's probably time
01097          to play some more dialtones */
01098       if (!res) {
01099          continue;
01100       }
01101       /* Alright, lock the interface list again, and let's look and see what has
01102          happened */
01103       if (ast_mutex_lock(&iflock)) {
01104          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01105          continue;
01106       }
01107 
01108       for (i = iflist; i; i = i->next) {
01109          int j;
01110          /* Find the record */
01111          for (j = 0; j < inuse_fds; j++) {
01112             if (fds[j].fd == i->fd) {
01113                break;
01114             }
01115          }
01116 
01117          /* Not found? */
01118          if (j == inuse_fds) {
01119             continue;
01120          }
01121 
01122          if (fds[j].revents & POLLIN) {
01123             if (i->owner) {
01124                continue;
01125             }
01126             phone_mini_packet(i);
01127          }
01128          if (fds[j].revents & POLLERR) {
01129             if (i->owner) {
01130                continue;
01131             }
01132             phone_check_exception(i);
01133          }
01134       }
01135       ast_mutex_unlock(&iflock);
01136    }
01137    return NULL;
01138 }
01139 
01140 static int restart_monitor()
01141 {
01142    /* If we're supposed to be stopped -- stay stopped */
01143    if (monitor_thread == AST_PTHREADT_STOP)
01144       return 0;
01145    if (ast_mutex_lock(&monlock)) {
01146       ast_log(LOG_WARNING, "Unable to lock monitor\n");
01147       return -1;
01148    }
01149    if (monitor_thread == pthread_self()) {
01150       ast_mutex_unlock(&monlock);
01151       ast_log(LOG_WARNING, "Cannot kill myself\n");
01152       return -1;
01153    }
01154    if (monitor_thread != AST_PTHREADT_NULL) {
01155       if (ast_mutex_lock(&iflock)) {
01156          ast_mutex_unlock(&monlock);
01157          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01158          return -1;
01159       }
01160       monitor = 0;
01161       while (pthread_kill(monitor_thread, SIGURG) == 0)
01162          sched_yield();
01163       pthread_join(monitor_thread, NULL);
01164       ast_mutex_unlock(&iflock);
01165    }
01166    monitor = 1;
01167    /* Start a new monitor */
01168    if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
01169       ast_mutex_unlock(&monlock);
01170       ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
01171       return -1;
01172    }
01173    ast_mutex_unlock(&monlock);
01174    return 0;
01175 }
01176 
01177 static struct phone_pvt *mkif(const char *iface, int mode, int txgain, int rxgain)
01178 {
01179    /* Make a phone_pvt structure for this interface */
01180    struct phone_pvt *tmp;
01181    int flags;  
01182    
01183    tmp = ast_calloc(1, sizeof(*tmp));
01184    if (tmp) {
01185       tmp->fd = open(iface, O_RDWR);
01186       if (tmp->fd < 0) {
01187          ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);
01188          ast_free(tmp);
01189          return NULL;
01190       }
01191       if (mode == MODE_FXO) {
01192          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_PSTN)) {
01193             ast_debug(1, "Unable to set port to PSTN\n");
01194          }
01195       } else {
01196          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_POTS)) 
01197              if (mode != MODE_FXS)
01198                   ast_debug(1, "Unable to set port to POTS\n");
01199       }
01200       ioctl(tmp->fd, PHONE_PLAY_STOP);
01201       ioctl(tmp->fd, PHONE_REC_STOP);
01202       ioctl(tmp->fd, PHONE_RING_STOP);
01203       ioctl(tmp->fd, PHONE_CPT_STOP);
01204       if (ioctl(tmp->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
01205          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",iface, strerror(errno));
01206       if (echocancel != AEC_OFF)
01207          ioctl(tmp->fd, IXJCTL_AEC_START, echocancel);
01208       if (silencesupression) 
01209          tmp->silencesupression = 1;
01210 #ifdef PHONE_VAD
01211       ioctl(tmp->fd, PHONE_VAD, tmp->silencesupression);
01212 #endif
01213       tmp->mode = mode;
01214       flags = fcntl(tmp->fd, F_GETFL);
01215       fcntl(tmp->fd, F_SETFL, flags | O_NONBLOCK);
01216       tmp->owner = NULL;
01217       tmp->lastformat = -1;
01218       tmp->lastinput = -1;
01219       tmp->ministate = 0;
01220       memset(tmp->ext, 0, sizeof(tmp->ext));
01221       ast_copy_string(tmp->language, language, sizeof(tmp->language));
01222       ast_copy_string(tmp->dev, iface, sizeof(tmp->dev));
01223       ast_copy_string(tmp->context, context, sizeof(tmp->context));
01224       tmp->next = NULL;
01225       tmp->obuflen = 0;
01226       tmp->dialtone = 0;
01227       tmp->cpt = 0;
01228       ast_copy_string(tmp->cid_num, cid_num, sizeof(tmp->cid_num));
01229       ast_copy_string(tmp->cid_name, cid_name, sizeof(tmp->cid_name));
01230       tmp->txgain = txgain;
01231       ioctl(tmp->fd, PHONE_PLAY_VOLUME, tmp->txgain);
01232       tmp->rxgain = rxgain;
01233       ioctl(tmp->fd, PHONE_REC_VOLUME, tmp->rxgain);
01234    }
01235    return tmp;
01236 }
01237 
01238 static struct ast_channel *phone_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause)
01239 {
01240    format_t oldformat;
01241    struct phone_pvt *p;
01242    struct ast_channel *tmp = NULL;
01243    char *name = data;
01244 
01245    /* Search for an unowned channel */
01246    if (ast_mutex_lock(&iflock)) {
01247       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01248       return NULL;
01249    }
01250    p = iflist;
01251    while(p) {
01252       if (p->mode == MODE_FXS ||
01253           format & (AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) {
01254           size_t length = strlen(p->dev + 5);
01255          if (strncmp(name, p->dev + 5, length) == 0 &&
01256              !isalnum(name[length])) {
01257              if (!p->owner) {
01258                      tmp = phone_new(p, AST_STATE_DOWN, p->context, requestor ? requestor->linkedid : NULL);
01259                      break;
01260                 } else
01261                      *cause = AST_CAUSE_BUSY;
01262             }
01263       }
01264       p = p->next;
01265    }
01266    ast_mutex_unlock(&iflock);
01267    restart_monitor();
01268    if (tmp == NULL) {
01269       oldformat = format;
01270       format &= (AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW);
01271       if (!format) {
01272          char buf[256];
01273          ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%s'\n", ast_getformatname_multiple(buf, sizeof(buf), oldformat));
01274          return NULL;
01275       }
01276    }
01277    return tmp;
01278 }
01279 
01280 /* parse gain value from config file */
01281 static int parse_gain_value(const char *gain_type, const char *value)
01282 {
01283    float gain;
01284 
01285    /* try to scan number */
01286    if (sscanf(value, "%30f", &gain) != 1)
01287    {
01288       ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n",
01289          value, gain_type, config);
01290       return DEFAULT_GAIN;
01291    }
01292 
01293    /* multiplicate gain by 1.0 gain value */ 
01294    gain = gain * (float)DEFAULT_GAIN;
01295 
01296    /* percentage? */
01297    if (value[strlen(value) - 1] == '%')
01298       return (int)(gain / (float)100);
01299 
01300    return (int)gain;
01301 }
01302 
01303 static int __unload_module(void)
01304 {
01305    struct phone_pvt *p, *pl;
01306    /* First, take us out of the channel loop */
01307    if (cur_tech)
01308       ast_channel_unregister(cur_tech);
01309    if (!ast_mutex_lock(&iflock)) {
01310       /* Hangup all interfaces if they have an owner */
01311       p = iflist;
01312       while(p) {
01313          if (p->owner)
01314             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
01315          p = p->next;
01316       }
01317       iflist = NULL;
01318       ast_mutex_unlock(&iflock);
01319    } else {
01320       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01321       return -1;
01322    }
01323    if (!ast_mutex_lock(&monlock)) {
01324       if (monitor_thread > AST_PTHREADT_NULL) {
01325          monitor = 0;
01326          while (pthread_kill(monitor_thread, SIGURG) == 0)
01327             sched_yield();
01328          pthread_join(monitor_thread, NULL);
01329       }
01330       monitor_thread = AST_PTHREADT_STOP;
01331       ast_mutex_unlock(&monlock);
01332    } else {
01333       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01334       return -1;
01335    }
01336 
01337    if (!ast_mutex_lock(&iflock)) {
01338       /* Destroy all the interfaces and free their memory */
01339       p = iflist;
01340       while(p) {
01341          /* Close the socket, assuming it's real */
01342          if (p->fd > -1)
01343             close(p->fd);
01344          pl = p;
01345          p = p->next;
01346          /* Free associated memory */
01347          ast_free(pl);
01348       }
01349       iflist = NULL;
01350       ast_mutex_unlock(&iflock);
01351    } else {
01352       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01353       return -1;
01354    }
01355       
01356    return 0;
01357 }
01358 
01359 static int unload_module(void)
01360 {
01361    return __unload_module();
01362 }
01363 
01364 static int load_module(void)
01365 {
01366    struct ast_config *cfg;
01367    struct ast_variable *v;
01368    struct phone_pvt *tmp;
01369    int mode = MODE_IMMEDIATE;
01370    int txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; /* default gain 1.0 */
01371    struct ast_flags config_flags = { 0 };
01372 
01373    if ((cfg = ast_config_load(config, config_flags)) == CONFIG_STATUS_FILEINVALID) {
01374       ast_log(LOG_ERROR, "Config file %s is in an invalid format.  Aborting.\n", config);
01375       return AST_MODULE_LOAD_DECLINE;
01376    }
01377 
01378    /* We *must* have a config file otherwise stop immediately */
01379    if (!cfg) {
01380       ast_log(LOG_ERROR, "Unable to load config %s\n", config);
01381       return AST_MODULE_LOAD_DECLINE;
01382    }
01383    if (ast_mutex_lock(&iflock)) {
01384       /* It's a little silly to lock it, but we mind as well just to be sure */
01385       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01386       return AST_MODULE_LOAD_FAILURE;
01387    }
01388    v = ast_variable_browse(cfg, "interfaces");
01389    while(v) {
01390       /* Create the interface list */
01391       if (!strcasecmp(v->name, "device")) {
01392             tmp = mkif(v->value, mode, txgain, rxgain);
01393             if (tmp) {
01394                tmp->next = iflist;
01395                iflist = tmp;
01396                
01397             } else {
01398                ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
01399                ast_config_destroy(cfg);
01400                ast_mutex_unlock(&iflock);
01401                __unload_module();
01402                return AST_MODULE_LOAD_FAILURE;
01403             }
01404       } else if (!strcasecmp(v->name, "silencesupression")) {
01405          silencesupression = ast_true(v->value);
01406       } else if (!strcasecmp(v->name, "language")) {
01407          ast_copy_string(language, v->value, sizeof(language));
01408       } else if (!strcasecmp(v->name, "callerid")) {
01409          ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
01410       } else if (!strcasecmp(v->name, "mode")) {
01411          if (!strncasecmp(v->value, "di", 2)) 
01412             mode = MODE_DIALTONE;
01413          else if (!strncasecmp(v->value, "sig", 3))
01414             mode = MODE_SIGMA;
01415          else if (!strncasecmp(v->value, "im", 2))
01416             mode = MODE_IMMEDIATE;
01417          else if (!strncasecmp(v->value, "fxs", 3)) {
01418             mode = MODE_FXS;
01419             prefformat = 0x01ff0000; /* All non-voice */
01420          }
01421          else if (!strncasecmp(v->value, "fx", 2))
01422             mode = MODE_FXO;
01423          else
01424             ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
01425       } else if (!strcasecmp(v->name, "context")) {
01426          ast_copy_string(context, v->value, sizeof(context));
01427       } else if (!strcasecmp(v->name, "format")) {
01428          if (!strcasecmp(v->value, "g729")) {
01429             prefformat = AST_FORMAT_G729A;
01430                         } else if (!strcasecmp(v->value, "g723.1")) {
01431             prefformat = AST_FORMAT_G723_1;
01432          } else if (!strcasecmp(v->value, "slinear")) {
01433             if (mode == MODE_FXS)
01434                 prefformat |= AST_FORMAT_SLINEAR;
01435             else prefformat = AST_FORMAT_SLINEAR;
01436          } else if (!strcasecmp(v->value, "ulaw")) {
01437             prefformat = AST_FORMAT_ULAW;
01438          } else
01439             ast_log(LOG_WARNING, "Unknown format '%s'\n", v->value);
01440       } else if (!strcasecmp(v->name, "echocancel")) {
01441          if (!strcasecmp(v->value, "off")) {
01442             echocancel = AEC_OFF;
01443          } else if (!strcasecmp(v->value, "low")) {
01444             echocancel = AEC_LOW;
01445          } else if (!strcasecmp(v->value, "medium")) {
01446             echocancel = AEC_MED;
01447          } else if (!strcasecmp(v->value, "high")) {
01448             echocancel = AEC_HIGH;
01449          } else 
01450             ast_log(LOG_WARNING, "Unknown echo cancellation '%s'\n", v->value);
01451       } else if (!strcasecmp(v->name, "txgain")) {
01452          txgain = parse_gain_value(v->name, v->value);
01453       } else if (!strcasecmp(v->name, "rxgain")) {
01454          rxgain = parse_gain_value(v->name, v->value);
01455       }  
01456       v = v->next;
01457    }
01458    ast_mutex_unlock(&iflock);
01459 
01460    if (mode == MODE_FXS) {
01461       phone_tech_fxs.capabilities = prefformat;
01462       cur_tech = &phone_tech_fxs;
01463    } else
01464       cur_tech = (struct ast_channel_tech *) &phone_tech;
01465 
01466    /* Make sure we can register our Adtranphone channel type */
01467 
01468    if (ast_channel_register(cur_tech)) {
01469       ast_log(LOG_ERROR, "Unable to register channel class 'Phone'\n");
01470       ast_config_destroy(cfg);
01471       __unload_module();
01472       return AST_MODULE_LOAD_FAILURE;
01473    }
01474    ast_config_destroy(cfg);
01475    /* And start the monitor for the first time */
01476    restart_monitor();
01477    return AST_MODULE_LOAD_SUCCESS;
01478 }
01479 
01480 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Linux Telephony API Support");

Generated on Wed Apr 6 11:29:42 2011 for Asterisk - The Open Source Telephony Project by  doxygen 1.4.7