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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    <support_level>extended</support_level>
00031  ***/
00032 
00033 #include "asterisk.h"
00034 
00035 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 328209 $")
00036 
00037 #include <ctype.h>
00038 #include <sys/socket.h>
00039 #include <sys/time.h>
00040 #include <arpa/inet.h>
00041 #include <fcntl.h>
00042 #include <sys/ioctl.h>
00043 #include <signal.h>
00044 #ifdef HAVE_LINUX_COMPILER_H
00045 #include <linux/compiler.h>
00046 #endif
00047 #include <linux/telephony.h>
00048 /* Still use some IXJ specific stuff */
00049 #include <linux/version.h>
00050 #include <linux/ixjuser.h>
00051 
00052 #include "asterisk/lock.h"
00053 #include "asterisk/channel.h"
00054 #include "asterisk/config.h"
00055 #include "asterisk/module.h"
00056 #include "asterisk/pbx.h"
00057 #include "asterisk/utils.h"
00058 #include "asterisk/callerid.h"
00059 #include "asterisk/causes.h"
00060 #include "asterisk/stringfields.h"
00061 #include "asterisk/musiconhold.h"
00062 
00063 #include "chan_phone.h"
00064 
00065 #ifdef QTI_PHONEJACK_TJ_PCI   /* check for the newer quicknet driver v.3.1.0 which has this symbol */
00066 #define QNDRV_VER 310
00067 #else
00068 #define QNDRV_VER 100
00069 #endif
00070 
00071 #if QNDRV_VER > 100
00072 #ifdef __linux__
00073 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00074 #else /* FreeBSD and others */
00075 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, x);
00076 #endif /* __linux__ */
00077 #else /* older driver */
00078 #define IXJ_PHONE_RING_START(x)  ioctl(p->fd, PHONE_RING_START, &x);
00079 #endif
00080 
00081 #define DEFAULT_CALLER_ID "Unknown"
00082 #define PHONE_MAX_BUF 480
00083 #define DEFAULT_GAIN 0x100
00084 
00085 static const char tdesc[] = "Standard Linux Telephony API Driver";
00086 static const char config[] = "phone.conf";
00087 
00088 /* Default context for dialtone mode */
00089 static char context[AST_MAX_EXTENSION] = "default";
00090 
00091 /* Default language */
00092 static char language[MAX_LANGUAGE] = "";
00093 
00094 static int echocancel = AEC_OFF;
00095 
00096 static int silencesupression = 0;
00097 
00098 static format_t prefformat = AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW;
00099 
00100 /* Protect the interface list (of phone_pvt's) */
00101 AST_MUTEX_DEFINE_STATIC(iflock);
00102 
00103 /* Protect the monitoring thread, so only one process can kill or start it, and not
00104    when it's doing something critical. */
00105 AST_MUTEX_DEFINE_STATIC(monlock);
00106 
00107 /* Boolean value whether the monitoring thread shall continue. */
00108 static unsigned int monitor;
00109    
00110 /* This is the thread for the monitor which checks for input on the channels
00111    which are not currently in use.  */
00112 static pthread_t monitor_thread = AST_PTHREADT_NULL;
00113 
00114 static int restart_monitor(void);
00115 
00116 /* The private structures of the Phone Jack channels are linked for
00117    selecting outgoing channels */
00118    
00119 #define MODE_DIALTONE   1
00120 #define MODE_IMMEDIATE  2
00121 #define MODE_FXO  3
00122 #define MODE_FXS        4
00123 #define MODE_SIGMA      5
00124 
00125 static struct phone_pvt {
00126    int fd;                    /* Raw file descriptor for this device */
00127    struct ast_channel *owner;    /* Channel we belong to, possibly NULL */
00128    int mode;                  /* Is this in the  */
00129    format_t lastformat;            /* Last output format */
00130    format_t lastinput;             /* Last input format */
00131    int ministate;             /* Miniature state, for dialtone mode */
00132    char dev[256];             /* Device name */
00133    struct phone_pvt *next;       /* Next channel in list */
00134    struct ast_frame fr;       /* Frame */
00135    char offset[AST_FRIENDLY_OFFSET];
00136    char buf[PHONE_MAX_BUF];               /* Static buffer for reading frames */
00137    int obuflen;
00138    int dialtone;
00139    int txgain, rxgain;             /* gain control for playing, recording  */
00140                            /* 0x100 - 1.0, 0x200 - 2.0, 0x80 - 0.5 */
00141    int cpt;                /* Call Progress Tone playing? */
00142    int silencesupression;
00143    char context[AST_MAX_EXTENSION];
00144    char obuf[PHONE_MAX_BUF * 2];
00145    char ext[AST_MAX_EXTENSION];
00146    char language[MAX_LANGUAGE];
00147    char cid_num[AST_MAX_EXTENSION];
00148    char cid_name[AST_MAX_EXTENSION];
00149 } *iflist = NULL;
00150 
00151 static char cid_num[AST_MAX_EXTENSION];
00152 static char cid_name[AST_MAX_EXTENSION];
00153 
00154 static struct ast_channel *phone_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause);
00155 static int phone_digit_begin(struct ast_channel *ast, char digit);
00156 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration);
00157 static int phone_call(struct ast_channel *ast, char *dest, int timeout);
00158 static int phone_hangup(struct ast_channel *ast);
00159 static int phone_answer(struct ast_channel *ast);
00160 static struct ast_frame *phone_read(struct ast_channel *ast);
00161 static int phone_write(struct ast_channel *ast, struct ast_frame *frame);
00162 static struct ast_frame *phone_exception(struct ast_channel *ast);
00163 static int phone_send_text(struct ast_channel *ast, const char *text);
00164 static int phone_fixup(struct ast_channel *old, struct ast_channel *new);
00165 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen);
00166 
00167 static const struct ast_channel_tech phone_tech = {
00168    .type = "Phone",
00169    .description = tdesc,
00170    .capabilities = AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW | AST_FORMAT_G729A,
00171    .requester = phone_request,
00172    .send_digit_begin = phone_digit_begin,
00173    .send_digit_end = phone_digit_end,
00174    .call = phone_call,
00175    .hangup = phone_hangup,
00176    .answer = phone_answer,
00177    .read = phone_read,
00178    .write = phone_write,
00179    .exception = phone_exception,
00180    .indicate = phone_indicate,
00181    .fixup = phone_fixup
00182 };
00183 
00184 static struct ast_channel_tech phone_tech_fxs = {
00185    .type = "Phone",
00186    .description = tdesc,
00187    .requester = phone_request,
00188    .send_digit_begin = phone_digit_begin,
00189    .send_digit_end = phone_digit_end,
00190    .call = phone_call,
00191    .hangup = phone_hangup,
00192    .answer = phone_answer,
00193    .read = phone_read,
00194    .write = phone_write,
00195    .exception = phone_exception,
00196    .write_video = phone_write,
00197    .send_text = phone_send_text,
00198    .indicate = phone_indicate,
00199    .fixup = phone_fixup
00200 };
00201 
00202 static struct ast_channel_tech *cur_tech;
00203 
00204 static int phone_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen)
00205 {
00206    struct phone_pvt *p = chan->tech_pvt;
00207    int res=-1;
00208    ast_debug(1, "Requested indication %d on channel %s\n", condition, chan->name);
00209    switch(condition) {
00210    case AST_CONTROL_FLASH:
00211       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00212       usleep(320000);
00213       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00214          p->lastformat = -1;
00215          res = 0;
00216          break;
00217    case AST_CONTROL_HOLD:
00218       ast_moh_start(chan, data, NULL);
00219       break;
00220    case AST_CONTROL_UNHOLD:
00221       ast_moh_stop(chan);
00222       break;
00223    case AST_CONTROL_SRCUPDATE:
00224       res = 0;
00225       break;
00226    default:
00227       ast_log(LOG_WARNING, "Condition %d is not supported on channel %s\n", condition, chan->name);
00228    }
00229    return res;
00230 }
00231 
00232 static int phone_fixup(struct ast_channel *old, struct ast_channel *new)
00233 {
00234    struct phone_pvt *pvt = old->tech_pvt;
00235    if (pvt && pvt->owner == old)
00236       pvt->owner = new;
00237    return 0;
00238 }
00239 
00240 static int phone_digit_begin(struct ast_channel *chan, char digit)
00241 {
00242    /* XXX Modify this callback to let Asterisk support controlling the length of DTMF */
00243    return 0;
00244 }
00245 
00246 static int phone_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
00247 {
00248    struct phone_pvt *p;
00249    int outdigit;
00250    p = ast->tech_pvt;
00251    ast_debug(1, "Dialed %c\n", digit);
00252    switch(digit) {
00253    case '0':
00254    case '1':
00255    case '2':
00256    case '3':
00257    case '4':
00258    case '5':
00259    case '6':
00260    case '7':
00261    case '8':
00262    case '9':
00263       outdigit = digit - '0';
00264       break;
00265    case '*':
00266       outdigit = 11;
00267       break;
00268    case '#':
00269       outdigit = 12;
00270       break;
00271    case 'f':   /*flash*/
00272    case 'F':
00273       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_ON_HOOK);
00274       usleep(320000);
00275       ioctl(p->fd, IXJCTL_PSTN_SET_STATE, PSTN_OFF_HOOK);
00276       p->lastformat = -1;
00277       return 0;
00278    default:
00279       ast_log(LOG_WARNING, "Unknown digit '%c'\n", digit);
00280       return -1;
00281    }
00282    ast_debug(1, "Dialed %d\n", outdigit);
00283    ioctl(p->fd, PHONE_PLAY_TONE, outdigit);
00284    p->lastformat = -1;
00285    return 0;
00286 }
00287 
00288 static int phone_call(struct ast_channel *ast, char *dest, int timeout)
00289 {
00290    struct phone_pvt *p;
00291 
00292    PHONE_CID cid;
00293    struct timeval UtcTime = ast_tvnow();
00294    struct ast_tm tm;
00295    int start;
00296 
00297    ast_localtime(&UtcTime, &tm, NULL);
00298 
00299    memset(&cid, 0, sizeof(PHONE_CID));
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    /* the standard format of ast->callerid is:  "name" <number>, but not always complete */
00305    if (!ast->connected.id.name.valid
00306       || ast_strlen_zero(ast->connected.id.name.str)) {
00307       strcpy(cid.name, DEFAULT_CALLER_ID);
00308    } else {
00309       ast_copy_string(cid.name, ast->connected.id.name.str, sizeof(cid.name));
00310    }
00311 
00312    if (ast->connected.id.number.valid && ast->connected.id.number.str) {
00313       ast_copy_string(cid.number, ast->connected.id.number.str, sizeof(cid.number));
00314    }
00315 
00316    p = ast->tech_pvt;
00317 
00318    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
00319       ast_log(LOG_WARNING, "phone_call called on %s, neither down nor reserved\n", ast->name);
00320       return -1;
00321    }
00322    ast_debug(1, "Ringing %s on %s (%d)\n", dest, ast->name, ast->fds[0]);
00323 
00324    start = IXJ_PHONE_RING_START(cid);
00325    if (start == -1)
00326       return -1;
00327    
00328    if (p->mode == MODE_FXS) {
00329       char *digit = strchr(dest, '/');
00330       if (digit)
00331       {
00332         digit++;
00333         while (*digit)
00334           phone_digit_end(ast, *digit++, 0);
00335       }
00336    }
00337  
00338    ast_setstate(ast, AST_STATE_RINGING);
00339    ast_queue_control(ast, AST_CONTROL_RINGING);
00340    return 0;
00341 }
00342 
00343 static int phone_hangup(struct ast_channel *ast)
00344 {
00345    struct phone_pvt *p;
00346    p = ast->tech_pvt;
00347    ast_debug(1, "phone_hangup(%s)\n", ast->name);
00348    if (!ast->tech_pvt) {
00349       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00350       return 0;
00351    }
00352    /* XXX Is there anything we can do to really hang up except stop recording? */
00353    ast_setstate(ast, AST_STATE_DOWN);
00354    if (ioctl(p->fd, PHONE_REC_STOP))
00355       ast_log(LOG_WARNING, "Failed to stop recording\n");
00356    if (ioctl(p->fd, PHONE_PLAY_STOP))
00357       ast_log(LOG_WARNING, "Failed to stop playing\n");
00358    if (ioctl(p->fd, PHONE_RING_STOP))
00359       ast_log(LOG_WARNING, "Failed to stop ringing\n");
00360    if (ioctl(p->fd, PHONE_CPT_STOP))
00361       ast_log(LOG_WARNING, "Failed to stop sounds\n");
00362 
00363    /* If it's an FXO, hang them up */
00364    if (p->mode == MODE_FXO) {
00365       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
00366          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",ast->name, strerror(errno));
00367    }
00368 
00369    /* If they're off hook, give a busy signal */
00370    if (ioctl(p->fd, PHONE_HOOKSTATE)) {
00371       ast_debug(1, "Got hunghup, giving busy signal\n");
00372       ioctl(p->fd, PHONE_BUSY);
00373       p->cpt = 1;
00374    }
00375    p->lastformat = -1;
00376    p->lastinput = -1;
00377    p->ministate = 0;
00378    p->obuflen = 0;
00379    p->dialtone = 0;
00380    memset(p->ext, 0, sizeof(p->ext));
00381    ((struct phone_pvt *)(ast->tech_pvt))->owner = NULL;
00382    ast_module_unref(ast_module_info->self);
00383    ast_verb(3, "Hungup '%s'\n", ast->name);
00384    ast->tech_pvt = NULL;
00385    ast_setstate(ast, AST_STATE_DOWN);
00386    restart_monitor();
00387    return 0;
00388 }
00389 
00390 static int phone_setup(struct ast_channel *ast)
00391 {
00392    struct phone_pvt *p;
00393    p = ast->tech_pvt;
00394    ioctl(p->fd, PHONE_CPT_STOP);
00395    /* Nothing to answering really, just start recording */
00396    if (ast->rawreadformat == AST_FORMAT_G729A) {
00397       /* Prefer g729 */
00398       ioctl(p->fd, PHONE_REC_STOP);
00399       if (p->lastinput != AST_FORMAT_G729A) {
00400          p->lastinput = AST_FORMAT_G729A;
00401          if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
00402             ast_log(LOG_WARNING, "Failed to set codec to g729\n");
00403             return -1;
00404          }
00405       }
00406         } else if (ast->rawreadformat == AST_FORMAT_G723_1) {
00407       ioctl(p->fd, PHONE_REC_STOP);
00408       if (p->lastinput != AST_FORMAT_G723_1) {
00409          p->lastinput = AST_FORMAT_G723_1;
00410          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00411             ast_log(LOG_WARNING, "Failed to set codec to g723.1\n");
00412             return -1;
00413          }
00414       }
00415    } else if (ast->rawreadformat == AST_FORMAT_SLINEAR) {
00416       ioctl(p->fd, PHONE_REC_STOP);
00417       if (p->lastinput != AST_FORMAT_SLINEAR) {
00418          p->lastinput = AST_FORMAT_SLINEAR;
00419          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00420             ast_log(LOG_WARNING, "Failed to set codec to signed linear 16\n");
00421             return -1;
00422          }
00423       }
00424    } else if (ast->rawreadformat == AST_FORMAT_ULAW) {
00425       ioctl(p->fd, PHONE_REC_STOP);
00426       if (p->lastinput != AST_FORMAT_ULAW) {
00427          p->lastinput = AST_FORMAT_ULAW;
00428          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00429             ast_log(LOG_WARNING, "Failed to set codec to uLaw\n");
00430             return -1;
00431          }
00432       }
00433    } else if (p->mode == MODE_FXS) {
00434       ioctl(p->fd, PHONE_REC_STOP);
00435       if (p->lastinput != ast->rawreadformat) {
00436          p->lastinput = ast->rawreadformat;
00437          if (ioctl(p->fd, PHONE_REC_CODEC, ast->rawreadformat)) {
00438             ast_log(LOG_WARNING, "Failed to set codec to %s\n", 
00439                ast_getformatname(ast->rawreadformat));
00440             return -1;
00441          }
00442       }
00443    } else {
00444       ast_log(LOG_WARNING, "Can't do format %s\n", ast_getformatname(ast->rawreadformat));
00445       return -1;
00446    }
00447    if (ioctl(p->fd, PHONE_REC_START)) {
00448       ast_log(LOG_WARNING, "Failed to start recording\n");
00449       return -1;
00450    }
00451    /* set the DTMF times (the default is too short) */
00452    ioctl(p->fd, PHONE_SET_TONE_ON_TIME, 300);
00453    ioctl(p->fd, PHONE_SET_TONE_OFF_TIME, 200);
00454    return 0;
00455 }
00456 
00457 static int phone_answer(struct ast_channel *ast)
00458 {
00459    struct phone_pvt *p;
00460    p = ast->tech_pvt;
00461    /* In case it's a LineJack, take it off hook */
00462    if (p->mode == MODE_FXO) {
00463       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_OFF_HOOK))
00464          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n", ast->name, strerror(errno));
00465       else
00466          ast_debug(1, "Took linejack off hook\n");
00467    }
00468    phone_setup(ast);
00469    ast_debug(1, "phone_answer(%s)\n", ast->name);
00470    ast->rings = 0;
00471    ast_setstate(ast, AST_STATE_UP);
00472    return 0;
00473 }
00474 
00475 #if 0
00476 static char phone_2digit(char c)
00477 {
00478    if (c == 12)
00479       return '#';
00480    else if (c == 11)
00481       return '*';
00482    else if ((c < 10) && (c >= 0))
00483       return '0' + c - 1;
00484    else
00485       return '?';
00486 }
00487 #endif
00488 
00489 static struct ast_frame  *phone_exception(struct ast_channel *ast)
00490 {
00491    int res;
00492    union telephony_exception phonee;
00493    struct phone_pvt *p = ast->tech_pvt;
00494    char digit;
00495 
00496    /* Some nice norms */
00497    p->fr.datalen = 0;
00498    p->fr.samples = 0;
00499    p->fr.data.ptr =  NULL;
00500    p->fr.src = "Phone";
00501    p->fr.offset = 0;
00502    p->fr.mallocd=0;
00503    p->fr.delivery = ast_tv(0,0);
00504    
00505    phonee.bytes = ioctl(p->fd, PHONE_EXCEPTION);
00506    if (phonee.bits.dtmf_ready)  {
00507       ast_debug(1, "phone_exception(): DTMF\n");
00508    
00509       /* We've got a digit -- Just handle this nicely and easily */
00510       digit =  ioctl(p->fd, PHONE_GET_DTMF_ASCII);
00511       p->fr.subclass.integer = digit;
00512       p->fr.frametype = AST_FRAME_DTMF;
00513       return &p->fr;
00514    }
00515    if (phonee.bits.hookstate) {
00516       ast_debug(1, "Hookstate changed\n");
00517       res = ioctl(p->fd, PHONE_HOOKSTATE);
00518       /* See if we've gone on hook, if so, notify by returning NULL */
00519       ast_debug(1, "New hookstate: %d\n", res);
00520       if (!res && (p->mode != MODE_FXO))
00521          return NULL;
00522       else {
00523          if (ast->_state == AST_STATE_RINGING) {
00524             /* They've picked up the phone */
00525             p->fr.frametype = AST_FRAME_CONTROL;
00526             p->fr.subclass.integer = AST_CONTROL_ANSWER;
00527             phone_setup(ast);
00528             ast_setstate(ast, AST_STATE_UP);
00529             return &p->fr;
00530          }  else 
00531             ast_log(LOG_WARNING, "Got off hook in weird state %d\n", ast->_state);
00532       }
00533    }
00534 #if 1
00535    if (phonee.bits.pstn_ring)
00536       ast_verbose("Unit is ringing\n");
00537    if (phonee.bits.caller_id) {
00538       ast_verbose("We have caller ID\n");
00539    }
00540    if (phonee.bits.pstn_wink)
00541       ast_verbose("Detected Wink\n");
00542 #endif
00543    /* Strange -- nothing there.. */
00544    p->fr.frametype = AST_FRAME_NULL;
00545    p->fr.subclass.integer = 0;
00546    return &p->fr;
00547 }
00548 
00549 static struct ast_frame  *phone_read(struct ast_channel *ast)
00550 {
00551    int res;
00552    struct phone_pvt *p = ast->tech_pvt;
00553    
00554 
00555    /* Some nice norms */
00556    p->fr.datalen = 0;
00557    p->fr.samples = 0;
00558    p->fr.data.ptr =  NULL;
00559    p->fr.src = "Phone";
00560    p->fr.offset = 0;
00561    p->fr.mallocd=0;
00562    p->fr.delivery = ast_tv(0,0);
00563 
00564    /* Try to read some data... */
00565    CHECK_BLOCKING(ast);
00566    res = read(p->fd, p->buf, PHONE_MAX_BUF);
00567    ast_clear_flag(ast, AST_FLAG_BLOCKING);
00568    if (res < 0) {
00569 #if 0
00570       if (errno == EAGAIN) {
00571          ast_log(LOG_WARNING, "Null frame received\n");
00572          p->fr.frametype = AST_FRAME_NULL;
00573          p->fr.subclass = 0;
00574          return &p->fr;
00575       }
00576 #endif
00577       ast_log(LOG_WARNING, "Error reading: %s\n", strerror(errno));
00578       return NULL;
00579    }
00580    p->fr.data.ptr = p->buf;
00581    if (p->mode != MODE_FXS)
00582    switch(p->buf[0] & 0x3) {
00583    case '0':
00584    case '1':
00585       /* Normal */
00586       break;
00587    case '2':
00588    case '3':
00589       /* VAD/CNG, only send two words */
00590       res = 4;
00591       break;
00592    }
00593    p->fr.samples = 240;
00594    p->fr.datalen = res;
00595    p->fr.frametype = p->lastinput <= AST_FORMAT_AUDIO_MASK ?
00596                           AST_FRAME_VOICE : 
00597            p->lastinput <= AST_FORMAT_PNG ? AST_FRAME_IMAGE 
00598            : AST_FRAME_VIDEO;
00599    p->fr.subclass.codec = p->lastinput;
00600    p->fr.offset = AST_FRIENDLY_OFFSET;
00601    /* Byteswap from little-endian to native-endian */
00602    if (p->fr.subclass.codec == AST_FORMAT_SLINEAR)
00603       ast_frame_byteswap_le(&p->fr);
00604    return &p->fr;
00605 }
00606 
00607 static int phone_write_buf(struct phone_pvt *p, const char *buf, int len, int frlen, int swap)
00608 {
00609    int res;
00610    /* Store as much of the buffer as we can, then write fixed frames */
00611    int space = sizeof(p->obuf) - p->obuflen;
00612    /* Make sure we have enough buffer space to store the frame */
00613    if (space < len)
00614       len = space;
00615    if (swap)
00616       ast_swapcopy_samples(p->obuf+p->obuflen, buf, len/2);
00617    else
00618       memcpy(p->obuf + p->obuflen, buf, len);
00619    p->obuflen += len;
00620    while(p->obuflen > frlen) {
00621       res = write(p->fd, p->obuf, frlen);
00622       if (res != frlen) {
00623          if (res < 1) {
00624 /*
00625  * Card is in non-blocking mode now and it works well now, but there are
00626  * lot of messages like this. So, this message is temporarily disabled.
00627  */
00628             return 0;
00629          } else {
00630             ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frlen);
00631          }
00632       }
00633       p->obuflen -= frlen;
00634       /* Move memory if necessary */
00635       if (p->obuflen) 
00636          memmove(p->obuf, p->obuf + frlen, p->obuflen);
00637    }
00638    return len;
00639 }
00640 
00641 static int phone_send_text(struct ast_channel *ast, const char *text)
00642 {
00643     int length = strlen(text);
00644     return phone_write_buf(ast->tech_pvt, text, length, length, 0) == 
00645            length ? 0 : -1;
00646 }
00647 
00648 static int phone_write(struct ast_channel *ast, struct ast_frame *frame)
00649 {
00650    struct phone_pvt *p = ast->tech_pvt;
00651    int res;
00652    int maxfr=0;
00653    char *pos;
00654    int sofar;
00655    int expected;
00656    int codecset = 0;
00657    char tmpbuf[4];
00658    /* Write a frame of (presumably voice) data */
00659    if (frame->frametype != AST_FRAME_VOICE && p->mode != MODE_FXS) {
00660       if (frame->frametype != AST_FRAME_IMAGE)
00661          ast_log(LOG_WARNING, "Don't know what to do with  frame type '%d'\n", frame->frametype);
00662       return 0;
00663    }
00664    if (!(frame->subclass.codec &
00665       (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW | AST_FORMAT_G729A)) && 
00666        p->mode != MODE_FXS) {
00667       ast_log(LOG_WARNING, "Cannot handle frames in %s format\n", ast_getformatname(frame->subclass.codec));
00668       return -1;
00669    }
00670 #if 0
00671    /* If we're not in up mode, go into up mode now */
00672    if (ast->_state != AST_STATE_UP) {
00673       ast_setstate(ast, AST_STATE_UP);
00674       phone_setup(ast);
00675    }
00676 #else
00677    if (ast->_state != AST_STATE_UP) {
00678       /* Don't try tos end audio on-hook */
00679       return 0;
00680    }
00681 #endif   
00682    if (frame->subclass.codec == AST_FORMAT_G729A) {
00683       if (p->lastformat != AST_FORMAT_G729A) {
00684          ioctl(p->fd, PHONE_PLAY_STOP);
00685          ioctl(p->fd, PHONE_REC_STOP);
00686          if (ioctl(p->fd, PHONE_PLAY_CODEC, G729)) {
00687             ast_log(LOG_WARNING, "Unable to set G729 mode\n");
00688             return -1;
00689          }
00690          if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
00691             ast_log(LOG_WARNING, "Unable to set G729 mode\n");
00692             return -1;
00693          }
00694          p->lastformat = AST_FORMAT_G729A;
00695          p->lastinput = AST_FORMAT_G729A;
00696          /* Reset output buffer */
00697          p->obuflen = 0;
00698          codecset = 1;
00699       }
00700       if (frame->datalen > 80) {
00701          ast_log(LOG_WARNING, "Frame size too large for G.729 (%d bytes)\n", frame->datalen);
00702          return -1;
00703       }
00704       maxfr = 80;
00705         } else if (frame->subclass.codec == AST_FORMAT_G723_1) {
00706       if (p->lastformat != AST_FORMAT_G723_1) {
00707          ioctl(p->fd, PHONE_PLAY_STOP);
00708          ioctl(p->fd, PHONE_REC_STOP);
00709          if (ioctl(p->fd, PHONE_PLAY_CODEC, G723_63)) {
00710             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00711             return -1;
00712          }
00713          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00714             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00715             return -1;
00716          }
00717          p->lastformat = AST_FORMAT_G723_1;
00718          p->lastinput = AST_FORMAT_G723_1;
00719          /* Reset output buffer */
00720          p->obuflen = 0;
00721          codecset = 1;
00722       }
00723       if (frame->datalen > 24) {
00724          ast_log(LOG_WARNING, "Frame size too large for G.723.1 (%d bytes)\n", frame->datalen);
00725          return -1;
00726       }
00727       maxfr = 24;
00728    } else if (frame->subclass.codec == AST_FORMAT_SLINEAR) {
00729       if (p->lastformat != AST_FORMAT_SLINEAR) {
00730          ioctl(p->fd, PHONE_PLAY_STOP);
00731          ioctl(p->fd, PHONE_REC_STOP);
00732          if (ioctl(p->fd, PHONE_PLAY_CODEC, LINEAR16)) {
00733             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00734             return -1;
00735          }
00736          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00737             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00738             return -1;
00739          }
00740          p->lastformat = AST_FORMAT_SLINEAR;
00741          p->lastinput = AST_FORMAT_SLINEAR;
00742          codecset = 1;
00743          /* Reset output buffer */
00744          p->obuflen = 0;
00745       }
00746       maxfr = 480;
00747    } else if (frame->subclass.codec == AST_FORMAT_ULAW) {
00748       if (p->lastformat != AST_FORMAT_ULAW) {
00749          ioctl(p->fd, PHONE_PLAY_STOP);
00750          ioctl(p->fd, PHONE_REC_STOP);
00751          if (ioctl(p->fd, PHONE_PLAY_CODEC, ULAW)) {
00752             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00753             return -1;
00754          }
00755          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00756             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00757             return -1;
00758          }
00759          p->lastformat = AST_FORMAT_ULAW;
00760          p->lastinput = AST_FORMAT_ULAW;
00761          codecset = 1;
00762          /* Reset output buffer */
00763          p->obuflen = 0;
00764       }
00765       maxfr = 240;
00766    } else {
00767       if (p->lastformat != frame->subclass.codec) {
00768          ioctl(p->fd, PHONE_PLAY_STOP);
00769          ioctl(p->fd, PHONE_REC_STOP);
00770          if (ioctl(p->fd, PHONE_PLAY_CODEC, (int) frame->subclass.codec)) {
00771             ast_log(LOG_WARNING, "Unable to set %s mode\n",
00772                ast_getformatname(frame->subclass.codec));
00773             return -1;
00774          }
00775          if (ioctl(p->fd, PHONE_REC_CODEC, (int) frame->subclass.codec)) {
00776             ast_log(LOG_WARNING, "Unable to set %s mode\n",
00777                ast_getformatname(frame->subclass.codec));
00778             return -1;
00779          }
00780          p->lastformat = frame->subclass.codec;
00781          p->lastinput = frame->subclass.codec;
00782          codecset = 1;
00783          /* Reset output buffer */
00784          p->obuflen = 0;
00785       }
00786       maxfr = 480;
00787    }
00788    if (codecset) {
00789       ioctl(p->fd, PHONE_REC_DEPTH, 3);
00790       ioctl(p->fd, PHONE_PLAY_DEPTH, 3);
00791       if (ioctl(p->fd, PHONE_PLAY_START)) {
00792          ast_log(LOG_WARNING, "Failed to start playback\n");
00793          return -1;
00794       }
00795       if (ioctl(p->fd, PHONE_REC_START)) {
00796          ast_log(LOG_WARNING, "Failed to start recording\n");
00797          return -1;
00798       }
00799    }
00800    /* If we get here, we have a frame of Appropriate data */
00801    sofar = 0;
00802    pos = frame->data.ptr;
00803    while(sofar < frame->datalen) {
00804       /* Write in no more than maxfr sized frames */
00805       expected = frame->datalen - sofar;
00806       if (maxfr < expected)
00807          expected = maxfr;
00808       /* XXX Internet Phone Jack does not handle the 4-byte VAD frame properly! XXX 
00809          we have to pad it to 24 bytes still.  */
00810       if (frame->datalen == 4) {
00811          if (p->silencesupression) {
00812             memcpy(tmpbuf, frame->data.ptr, 4);
00813             expected = 24;
00814             res = phone_write_buf(p, tmpbuf, expected, maxfr, 0);
00815          }
00816          res = 4;
00817          expected=4;
00818       } else {
00819          int swap = 0;
00820 #if __BYTE_ORDER == __BIG_ENDIAN
00821          if (frame->subclass.codec == AST_FORMAT_SLINEAR)
00822             swap = 1; /* Swap big-endian samples to little-endian as we copy */
00823 #endif
00824          res = phone_write_buf(p, pos, expected, maxfr, swap);
00825       }
00826       if (res != expected) {
00827          if ((errno != EAGAIN) && (errno != EINTR)) {
00828             if (res < 0) 
00829                ast_log(LOG_WARNING, "Write returned error (%s)\n", strerror(errno));
00830    /*
00831     * Card is in non-blocking mode now and it works well now, but there are
00832     * lot of messages like this. So, this message is temporarily disabled.
00833     */
00834 #if 0
00835             else
00836                ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frame->datalen);
00837 #endif
00838             return -1;
00839          } else /* Pretend it worked */
00840             res = expected;
00841       }
00842       sofar += res;
00843       pos += res;
00844    }
00845    return 0;
00846 }
00847 
00848 static struct ast_channel *phone_new(struct phone_pvt *i, int state, char *cntx, const char *linkedid)
00849 {
00850    struct ast_channel *tmp;
00851    struct phone_codec_data queried_codec;
00852    tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "", i->ext, i->context, linkedid, 0, "Phone/%s", i->dev + 5);
00853    if (tmp) {
00854       tmp->tech = cur_tech;
00855       ast_channel_set_fd(tmp, 0, i->fd);
00856       /* XXX Switching formats silently causes kernel panics XXX */
00857       if (i->mode == MODE_FXS &&
00858           ioctl(i->fd, PHONE_QUERY_CODEC, &queried_codec) == 0) {
00859          if (queried_codec.type == LINEAR16)
00860             tmp->nativeformats =
00861             tmp->rawreadformat =
00862             tmp->rawwriteformat =
00863             AST_FORMAT_SLINEAR;
00864          else {
00865             tmp->nativeformats =
00866             tmp->rawreadformat =
00867             tmp->rawwriteformat =
00868             prefformat & ~AST_FORMAT_SLINEAR;
00869          }
00870       }
00871       else {
00872          tmp->nativeformats = prefformat;
00873          tmp->rawreadformat = prefformat;
00874          tmp->rawwriteformat = prefformat;
00875       }
00876       /* no need to call ast_setstate: the channel_alloc already did its job */
00877       if (state == AST_STATE_RING)
00878          tmp->rings = 1;
00879       tmp->tech_pvt = i;
00880       ast_copy_string(tmp->context, cntx, sizeof(tmp->context));
00881       if (!ast_strlen_zero(i->ext))
00882          ast_copy_string(tmp->exten, i->ext, sizeof(tmp->exten));
00883       else
00884          strcpy(tmp->exten, "s");
00885       if (!ast_strlen_zero(i->language))
00886          ast_string_field_set(tmp, language, i->language);
00887 
00888       /* Don't use ast_set_callerid() here because it will
00889        * generate a NewCallerID event before the NewChannel event */
00890       if (!ast_strlen_zero(i->cid_num)) {
00891          tmp->caller.ani.number.valid = 1;
00892          tmp->caller.ani.number.str = ast_strdup(i->cid_num);
00893       }
00894 
00895       i->owner = tmp;
00896       ast_module_ref(ast_module_info->self);
00897       if (state != AST_STATE_DOWN) {
00898          if (state == AST_STATE_RING) {
00899             ioctl(tmp->fds[0], PHONE_RINGBACK);
00900             i->cpt = 1;
00901          }
00902          if (ast_pbx_start(tmp)) {
00903             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00904             ast_hangup(tmp);
00905          }
00906       }
00907    } else
00908       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
00909    return tmp;
00910 }
00911 
00912 static void phone_mini_packet(struct phone_pvt *i)
00913 {
00914    int res;
00915    char buf[1024];
00916    /* Ignore stuff we read... */
00917    res = read(i->fd, buf, sizeof(buf));
00918    if (res < 1) {
00919       ast_log(LOG_WARNING, "Read returned %d: %s\n", res, strerror(errno));
00920       return;
00921    }
00922 }
00923 
00924 static void phone_check_exception(struct phone_pvt *i)
00925 {
00926    int offhook=0;
00927    char digit[2] = {0 , 0};
00928    union telephony_exception phonee;
00929    /* XXX Do something XXX */
00930 #if 0
00931    ast_debug(1, "Exception!\n");
00932 #endif
00933    phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION);
00934    if (phonee.bits.dtmf_ready)  {
00935       digit[0] = ioctl(i->fd, PHONE_GET_DTMF_ASCII);
00936       if (i->mode == MODE_DIALTONE || i->mode == MODE_FXS || i->mode == MODE_SIGMA) {
00937          ioctl(i->fd, PHONE_PLAY_STOP);
00938          ioctl(i->fd, PHONE_REC_STOP);
00939          ioctl(i->fd, PHONE_CPT_STOP);
00940          i->dialtone = 0;
00941          if (strlen(i->ext) < AST_MAX_EXTENSION - 1)
00942             strncat(i->ext, digit, sizeof(i->ext) - strlen(i->ext) - 1);
00943          if ((i->mode != MODE_FXS ||
00944               !(phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION)) ||
00945               !phonee.bits.dtmf_ready) &&
00946              ast_exists_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00947             /* It's a valid extension in its context, get moving! */
00948             phone_new(i, AST_STATE_RING, i->context, NULL);
00949             /* No need to restart monitor, we are the monitor */
00950          } else if (!ast_canmatch_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00951             /* There is nothing in the specified extension that can match anymore.
00952                Try the default */
00953             if (ast_exists_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00954                /* Check the default, too... */
00955                phone_new(i, AST_STATE_RING, "default", NULL);
00956                /* XXX This should probably be justified better XXX */
00957             }  else if (!ast_canmatch_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00958                /* It's not a valid extension, give a busy signal */
00959                ast_debug(1, "%s can't match anything in %s or default\n", i->ext, i->context);
00960                ioctl(i->fd, PHONE_BUSY);
00961                i->cpt = 1;
00962             }
00963          }
00964 #if 0
00965          ast_verbose("Extension is %s\n", i->ext);
00966 #endif
00967       }
00968    }
00969    if (phonee.bits.hookstate) {
00970       offhook = ioctl(i->fd, PHONE_HOOKSTATE);
00971       if (offhook) {
00972          if (i->mode == MODE_IMMEDIATE) {
00973             phone_new(i, AST_STATE_RING, i->context, NULL);
00974          } else if (i->mode == MODE_DIALTONE) {
00975             ast_module_ref(ast_module_info->self);
00976             /* Reset the extension */
00977             i->ext[0] = '\0';
00978             /* Play the dialtone */
00979             i->dialtone++;
00980             ioctl(i->fd, PHONE_PLAY_STOP);
00981             ioctl(i->fd, PHONE_PLAY_CODEC, ULAW);
00982             ioctl(i->fd, PHONE_PLAY_START);
00983             i->lastformat = -1;
00984          } else if (i->mode == MODE_SIGMA) {
00985             ast_module_ref(ast_module_info->self);
00986             /* Reset the extension */
00987             i->ext[0] = '\0';
00988             /* Play the dialtone */
00989             i->dialtone++;
00990             ioctl(i->fd, PHONE_DIALTONE);
00991          }
00992       } else {
00993          if (i->dialtone)
00994             ast_module_unref(ast_module_info->self);
00995          memset(i->ext, 0, sizeof(i->ext));
00996          if (i->cpt)
00997          {
00998             ioctl(i->fd, PHONE_CPT_STOP);
00999             i->cpt = 0;
01000          }
01001          ioctl(i->fd, PHONE_PLAY_STOP);
01002          ioctl(i->fd, PHONE_REC_STOP);
01003          i->dialtone = 0;
01004          i->lastformat = -1;
01005       }
01006    }
01007    if (phonee.bits.pstn_ring) {
01008       ast_verbose("Unit is ringing\n");
01009       phone_new(i, AST_STATE_RING, i->context, NULL);
01010    }
01011    if (phonee.bits.caller_id)
01012       ast_verbose("We have caller ID\n");
01013    
01014    
01015 }
01016 
01017 static void *do_monitor(void *data)
01018 {
01019    struct pollfd *fds = NULL;
01020    int nfds = 0, inuse_fds = 0, res;
01021    struct phone_pvt *i;
01022    int tonepos = 0;
01023    /* The tone we're playing this round */
01024    struct timeval tv = { 0, 0 };
01025    int dotone;
01026    /* This thread monitors all the frame relay interfaces which are not yet in use
01027       (and thus do not have a separate thread) indefinitely */
01028    while (monitor) {
01029       /* Don't let anybody kill us right away.  Nobody should lock the interface list
01030          and wait for the monitor list, but the other way around is okay. */
01031       /* Lock the interface list */
01032       if (ast_mutex_lock(&iflock)) {
01033          ast_log(LOG_ERROR, "Unable to grab interface lock\n");
01034          return NULL;
01035       }
01036       /* Build the stuff we're going to select on, that is the socket of every
01037          phone_pvt that does not have an associated owner channel */
01038       i = iflist;
01039       dotone = 0;
01040       inuse_fds = 0;
01041       for (i = iflist; i; i = i->next) {
01042          if (!i->owner) {
01043             /* This needs to be watched, as it lacks an owner */
01044             if (inuse_fds == nfds) {
01045                void *tmp = ast_realloc(fds, (nfds + 1) * sizeof(*fds));
01046                if (!tmp) {
01047                   /* Avoid leaking */
01048                   continue;
01049                }
01050                fds = tmp;
01051                nfds++;
01052             }
01053             fds[inuse_fds].fd = i->fd;
01054             fds[inuse_fds].events = POLLIN | POLLERR;
01055             fds[inuse_fds].revents = 0;
01056             inuse_fds++;
01057 
01058             if (i->dialtone && i->mode != MODE_SIGMA) {
01059                /* Remember we're going to have to come back and play
01060                   more dialtones */
01061                if (ast_tvzero(tv)) {
01062                   /* If we're due for a dialtone, play one */
01063                   if (write(i->fd, DialTone + tonepos, 240) != 240) {
01064                      ast_log(LOG_WARNING, "Dial tone write error\n");
01065                   }
01066                }
01067                dotone++;
01068             }
01069          }
01070       }
01071       /* Okay, now that we know what to do, release the interface lock */
01072       ast_mutex_unlock(&iflock);
01073 
01074       /* Wait indefinitely for something to happen */
01075       if (dotone && i && i->mode != MODE_SIGMA) {
01076          /* If we're ready to recycle the time, set it to 30 ms */
01077          tonepos += 240;
01078          if (tonepos >= sizeof(DialTone)) {
01079             tonepos = 0;
01080          }
01081          if (ast_tvzero(tv)) {
01082             tv = ast_tv(0, 30000);
01083          }
01084          res = ast_poll2(fds, inuse_fds, &tv);
01085       } else {
01086          res = ast_poll(fds, inuse_fds, -1);
01087          tv = ast_tv(0, 0);
01088          tonepos = 0;
01089       }
01090       /* Okay, select has finished.  Let's see what happened.  */
01091       if (res < 0) {
01092          ast_debug(1, "poll returned %d: %s\n", res, strerror(errno));
01093          continue;
01094       }
01095       /* If there are no fd's changed, just continue, it's probably time
01096          to play some more dialtones */
01097       if (!res) {
01098          continue;
01099       }
01100       /* Alright, lock the interface list again, and let's look and see what has
01101          happened */
01102       if (ast_mutex_lock(&iflock)) {
01103          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01104          continue;
01105       }
01106 
01107       for (i = iflist; i; i = i->next) {
01108          int j;
01109          /* Find the record */
01110          for (j = 0; j < inuse_fds; j++) {
01111             if (fds[j].fd == i->fd) {
01112                break;
01113             }
01114          }
01115 
01116          /* Not found? */
01117          if (j == inuse_fds) {
01118             continue;
01119          }
01120 
01121          if (fds[j].revents & POLLIN) {
01122             if (i->owner) {
01123                continue;
01124             }
01125             phone_mini_packet(i);
01126          }
01127          if (fds[j].revents & POLLERR) {
01128             if (i->owner) {
01129                continue;
01130             }
01131             phone_check_exception(i);
01132          }
01133       }
01134       ast_mutex_unlock(&iflock);
01135    }
01136    return NULL;
01137 }
01138 
01139 static int restart_monitor()
01140 {
01141    /* If we're supposed to be stopped -- stay stopped */
01142    if (monitor_thread == AST_PTHREADT_STOP)
01143       return 0;
01144    if (ast_mutex_lock(&monlock)) {
01145       ast_log(LOG_WARNING, "Unable to lock monitor\n");
01146       return -1;
01147    }
01148    if (monitor_thread == pthread_self()) {
01149       ast_mutex_unlock(&monlock);
01150       ast_log(LOG_WARNING, "Cannot kill myself\n");
01151       return -1;
01152    }
01153    if (monitor_thread != AST_PTHREADT_NULL) {
01154       if (ast_mutex_lock(&iflock)) {
01155          ast_mutex_unlock(&monlock);
01156          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01157          return -1;
01158       }
01159       monitor = 0;
01160       while (pthread_kill(monitor_thread, SIGURG) == 0)
01161          sched_yield();
01162       pthread_join(monitor_thread, NULL);
01163       ast_mutex_unlock(&iflock);
01164    }
01165    monitor = 1;
01166    /* Start a new monitor */
01167    if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
01168       ast_mutex_unlock(&monlock);
01169       ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
01170       return -1;
01171    }
01172    ast_mutex_unlock(&monlock);
01173    return 0;
01174 }
01175 
01176 static struct phone_pvt *mkif(const char *iface, int mode, int txgain, int rxgain)
01177 {
01178    /* Make a phone_pvt structure for this interface */
01179    struct phone_pvt *tmp;
01180    int flags;  
01181    
01182    tmp = ast_calloc(1, sizeof(*tmp));
01183    if (tmp) {
01184       tmp->fd = open(iface, O_RDWR);
01185       if (tmp->fd < 0) {
01186          ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);
01187          ast_free(tmp);
01188          return NULL;
01189       }
01190       if (mode == MODE_FXO) {
01191          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_PSTN)) {
01192             ast_debug(1, "Unable to set port to PSTN\n");
01193          }
01194       } else {
01195          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_POTS)) 
01196              if (mode != MODE_FXS)
01197                   ast_debug(1, "Unable to set port to POTS\n");
01198       }
01199       ioctl(tmp->fd, PHONE_PLAY_STOP);
01200       ioctl(tmp->fd, PHONE_REC_STOP);
01201       ioctl(tmp->fd, PHONE_RING_STOP);
01202       ioctl(tmp->fd, PHONE_CPT_STOP);
01203       if (ioctl(tmp->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
01204          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",iface, strerror(errno));
01205       if (echocancel != AEC_OFF)
01206          ioctl(tmp->fd, IXJCTL_AEC_START, echocancel);
01207       if (silencesupression) 
01208          tmp->silencesupression = 1;
01209 #ifdef PHONE_VAD
01210       ioctl(tmp->fd, PHONE_VAD, tmp->silencesupression);
01211 #endif
01212       tmp->mode = mode;
01213       flags = fcntl(tmp->fd, F_GETFL);
01214       fcntl(tmp->fd, F_SETFL, flags | O_NONBLOCK);
01215       tmp->owner = NULL;
01216       tmp->lastformat = -1;
01217       tmp->lastinput = -1;
01218       tmp->ministate = 0;
01219       memset(tmp->ext, 0, sizeof(tmp->ext));
01220       ast_copy_string(tmp->language, language, sizeof(tmp->language));
01221       ast_copy_string(tmp->dev, iface, sizeof(tmp->dev));
01222       ast_copy_string(tmp->context, context, sizeof(tmp->context));
01223       tmp->next = NULL;
01224       tmp->obuflen = 0;
01225       tmp->dialtone = 0;
01226       tmp->cpt = 0;
01227       ast_copy_string(tmp->cid_num, cid_num, sizeof(tmp->cid_num));
01228       ast_copy_string(tmp->cid_name, cid_name, sizeof(tmp->cid_name));
01229       tmp->txgain = txgain;
01230       ioctl(tmp->fd, PHONE_PLAY_VOLUME, tmp->txgain);
01231       tmp->rxgain = rxgain;
01232       ioctl(tmp->fd, PHONE_REC_VOLUME, tmp->rxgain);
01233    }
01234    return tmp;
01235 }
01236 
01237 static struct ast_channel *phone_request(const char *type, format_t format, const struct ast_channel *requestor, void *data, int *cause)
01238 {
01239    format_t oldformat;
01240    struct phone_pvt *p;
01241    struct ast_channel *tmp = NULL;
01242    char *name = data;
01243 
01244    /* Search for an unowned channel */
01245    if (ast_mutex_lock(&iflock)) {
01246       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01247       return NULL;
01248    }
01249    p = iflist;
01250    while(p) {
01251       if (p->mode == MODE_FXS ||
01252           format & (AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) {
01253           size_t length = strlen(p->dev + 5);
01254          if (strncmp(name, p->dev + 5, length) == 0 &&
01255              !isalnum(name[length])) {
01256              if (!p->owner) {
01257                      tmp = phone_new(p, AST_STATE_DOWN, p->context, requestor ? requestor->linkedid : NULL);
01258                      break;
01259                 } else
01260                      *cause = AST_CAUSE_BUSY;
01261             }
01262       }
01263       p = p->next;
01264    }
01265    ast_mutex_unlock(&iflock);
01266    restart_monitor();
01267    if (tmp == NULL) {
01268       oldformat = format;
01269       format &= (AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW);
01270       if (!format) {
01271          char buf[256];
01272          ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%s'\n", ast_getformatname_multiple(buf, sizeof(buf), oldformat));
01273          return NULL;
01274       }
01275    }
01276    return tmp;
01277 }
01278 
01279 /* parse gain value from config file */
01280 static int parse_gain_value(const char *gain_type, const char *value)
01281 {
01282    float gain;
01283 
01284    /* try to scan number */
01285    if (sscanf(value, "%30f", &gain) != 1)
01286    {
01287       ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n",
01288          value, gain_type, config);
01289       return DEFAULT_GAIN;
01290    }
01291 
01292    /* multiplicate gain by 1.0 gain value */ 
01293    gain = gain * (float)DEFAULT_GAIN;
01294 
01295    /* percentage? */
01296    if (value[strlen(value) - 1] == '%')
01297       return (int)(gain / (float)100);
01298 
01299    return (int)gain;
01300 }
01301 
01302 static int __unload_module(void)
01303 {
01304    struct phone_pvt *p, *pl;
01305    /* First, take us out of the channel loop */
01306    if (cur_tech)
01307       ast_channel_unregister(cur_tech);
01308    if (!ast_mutex_lock(&iflock)) {
01309       /* Hangup all interfaces if they have an owner */
01310       p = iflist;
01311       while(p) {
01312          if (p->owner)
01313             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
01314          p = p->next;
01315       }
01316       iflist = NULL;
01317       ast_mutex_unlock(&iflock);
01318    } else {
01319       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01320       return -1;
01321    }
01322    if (!ast_mutex_lock(&monlock)) {
01323       if (monitor_thread > AST_PTHREADT_NULL) {
01324          monitor = 0;
01325          while (pthread_kill(monitor_thread, SIGURG) == 0)
01326             sched_yield();
01327          pthread_join(monitor_thread, NULL);
01328       }
01329       monitor_thread = AST_PTHREADT_STOP;
01330       ast_mutex_unlock(&monlock);
01331    } else {
01332       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01333       return -1;
01334    }
01335 
01336    if (!ast_mutex_lock(&iflock)) {
01337       /* Destroy all the interfaces and free their memory */
01338       p = iflist;
01339       while(p) {
01340          /* Close the socket, assuming it's real */
01341          if (p->fd > -1)
01342             close(p->fd);
01343          pl = p;
01344          p = p->next;
01345          /* Free associated memory */
01346          ast_free(pl);
01347       }
01348       iflist = NULL;
01349       ast_mutex_unlock(&iflock);
01350    } else {
01351       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01352       return -1;
01353    }
01354       
01355    return 0;
01356 }
01357 
01358 static int unload_module(void)
01359 {
01360    return __unload_module();
01361 }
01362 
01363 static int load_module(void)
01364 {
01365    struct ast_config *cfg;
01366    struct ast_variable *v;
01367    struct phone_pvt *tmp;
01368    int mode = MODE_IMMEDIATE;
01369    int txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; /* default gain 1.0 */
01370    struct ast_flags config_flags = { 0 };
01371 
01372    if ((cfg = ast_config_load(config, config_flags)) == CONFIG_STATUS_FILEINVALID) {
01373       ast_log(LOG_ERROR, "Config file %s is in an invalid format.  Aborting.\n", config);
01374       return AST_MODULE_LOAD_DECLINE;
01375    }
01376 
01377    /* We *must* have a config file otherwise stop immediately */
01378    if (!cfg) {
01379       ast_log(LOG_ERROR, "Unable to load config %s\n", config);
01380       return AST_MODULE_LOAD_DECLINE;
01381    }
01382    if (ast_mutex_lock(&iflock)) {
01383       /* It's a little silly to lock it, but we mind as well just to be sure */
01384       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01385       return AST_MODULE_LOAD_FAILURE;
01386    }
01387    v = ast_variable_browse(cfg, "interfaces");
01388    while(v) {
01389       /* Create the interface list */
01390       if (!strcasecmp(v->name, "device")) {
01391             tmp = mkif(v->value, mode, txgain, rxgain);
01392             if (tmp) {
01393                tmp->next = iflist;
01394                iflist = tmp;
01395                
01396             } else {
01397                ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
01398                ast_config_destroy(cfg);
01399                ast_mutex_unlock(&iflock);
01400                __unload_module();
01401                return AST_MODULE_LOAD_FAILURE;
01402             }
01403       } else if (!strcasecmp(v->name, "silencesupression")) {
01404          silencesupression = ast_true(v->value);
01405       } else if (!strcasecmp(v->name, "language")) {
01406          ast_copy_string(language, v->value, sizeof(language));
01407       } else if (!strcasecmp(v->name, "callerid")) {
01408          ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
01409       } else if (!strcasecmp(v->name, "mode")) {
01410          if (!strncasecmp(v->value, "di", 2)) 
01411             mode = MODE_DIALTONE;
01412          else if (!strncasecmp(v->value, "sig", 3))
01413             mode = MODE_SIGMA;
01414          else if (!strncasecmp(v->value, "im", 2))
01415             mode = MODE_IMMEDIATE;
01416          else if (!strncasecmp(v->value, "fxs", 3)) {
01417             mode = MODE_FXS;
01418             prefformat = 0x01ff0000; /* All non-voice */
01419          }
01420          else if (!strncasecmp(v->value, "fx", 2))
01421             mode = MODE_FXO;
01422          else
01423             ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
01424       } else if (!strcasecmp(v->name, "context")) {
01425          ast_copy_string(context, v->value, sizeof(context));
01426       } else if (!strcasecmp(v->name, "format")) {
01427          if (!strcasecmp(v->value, "g729")) {
01428             prefformat = AST_FORMAT_G729A;
01429                         } else if (!strcasecmp(v->value, "g723.1")) {
01430             prefformat = AST_FORMAT_G723_1;
01431          } else if (!strcasecmp(v->value, "slinear")) {
01432             if (mode == MODE_FXS)
01433                 prefformat |= AST_FORMAT_SLINEAR;
01434             else prefformat = AST_FORMAT_SLINEAR;
01435          } else if (!strcasecmp(v->value, "ulaw")) {
01436             prefformat = AST_FORMAT_ULAW;
01437          } else
01438             ast_log(LOG_WARNING, "Unknown format '%s'\n", v->value);
01439       } else if (!strcasecmp(v->name, "echocancel")) {
01440          if (!strcasecmp(v->value, "off")) {
01441             echocancel = AEC_OFF;
01442          } else if (!strcasecmp(v->value, "low")) {
01443             echocancel = AEC_LOW;
01444          } else if (!strcasecmp(v->value, "medium")) {
01445             echocancel = AEC_MED;
01446          } else if (!strcasecmp(v->value, "high")) {
01447             echocancel = AEC_HIGH;
01448          } else 
01449             ast_log(LOG_WARNING, "Unknown echo cancellation '%s'\n", v->value);
01450       } else if (!strcasecmp(v->name, "txgain")) {
01451          txgain = parse_gain_value(v->name, v->value);
01452       } else if (!strcasecmp(v->name, "rxgain")) {
01453          rxgain = parse_gain_value(v->name, v->value);
01454       }  
01455       v = v->next;
01456    }
01457    ast_mutex_unlock(&iflock);
01458 
01459    if (mode == MODE_FXS) {
01460       phone_tech_fxs.capabilities = prefformat;
01461       cur_tech = &phone_tech_fxs;
01462    } else
01463       cur_tech = (struct ast_channel_tech *) &phone_tech;
01464 
01465    /* Make sure we can register our Adtranphone channel type */
01466 
01467    if (ast_channel_register(cur_tech)) {
01468       ast_log(LOG_ERROR, "Unable to register channel class 'Phone'\n");
01469       ast_config_destroy(cfg);
01470       __unload_module();
01471       return AST_MODULE_LOAD_FAILURE;
01472    }
01473    ast_config_destroy(cfg);
01474    /* And start the monitor for the first time */
01475    restart_monitor();
01476    return AST_MODULE_LOAD_SUCCESS;
01477 }
01478 
01479 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Linux Telephony API Support");

Generated on Mon Oct 8 12:39:00 2012 for Asterisk - The Open Source Telephony Project by  doxygen 1.4.7