Wed Oct 28 11:50:59 2009

Asterisk developer's documentation


chan_phone.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 1999 - 2005, Digium, Inc.
00005  *
00006  * Mark Spencer <markster@digium.com>
00007  *
00008  * See http://www.asterisk.org for more information about
00009  * the Asterisk project. Please do not directly contact
00010  * any of the maintainers of this project for assistance;
00011  * the project provides a web site, mailing lists and IRC
00012  * channels for your use.
00013  *
00014  * This program is free software, distributed under the terms of
00015  * the GNU General Public License Version 2. See the LICENSE file
00016  * at the top of the source tree.
00017  */
00018 
00019 /*! \file
00020  *
00021  * \brief Generic Linux Telephony Interface driver
00022  *
00023  * \author Mark Spencer <markster@digium.com>
00024  * 
00025  * \ingroup channel_drivers
00026  */
00027 
00028 /*** MODULEINFO
00029    <depend>ixjuser</depend>
00030  ***/
00031 
00032 #include "asterisk.h"
00033 
00034 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 218218 $")
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 int 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    int lastformat;               /* Last output format */
00129    int 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, int format, 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_strlen_zero(ast->cid.cid_name))
00307       strcpy(cid.name, DEFAULT_CALLER_ID);
00308    else
00309       ast_copy_string(cid.name, ast->cid.cid_name, sizeof(cid.name));
00310 
00311    if (ast->cid.cid_num) 
00312       ast_copy_string(cid.number, ast->cid.cid_num, sizeof(cid.number));
00313 
00314    p = ast->tech_pvt;
00315 
00316    if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) {
00317       ast_log(LOG_WARNING, "phone_call called on %s, neither down nor reserved\n", ast->name);
00318       return -1;
00319    }
00320    ast_debug(1, "Ringing %s on %s (%d)\n", dest, ast->name, ast->fds[0]);
00321 
00322    start = IXJ_PHONE_RING_START(cid);
00323    if (start == -1)
00324       return -1;
00325    
00326    if (p->mode == MODE_FXS) {
00327       char *digit = strchr(dest, '/');
00328       if (digit)
00329       {
00330         digit++;
00331         while (*digit)
00332           phone_digit_end(ast, *digit++, 0);
00333       }
00334    }
00335  
00336    ast_setstate(ast, AST_STATE_RINGING);
00337    ast_queue_control(ast, AST_CONTROL_RINGING);
00338    return 0;
00339 }
00340 
00341 static int phone_hangup(struct ast_channel *ast)
00342 {
00343    struct phone_pvt *p;
00344    p = ast->tech_pvt;
00345    ast_debug(1, "phone_hangup(%s)\n", ast->name);
00346    if (!ast->tech_pvt) {
00347       ast_log(LOG_WARNING, "Asked to hangup channel not connected\n");
00348       return 0;
00349    }
00350    /* XXX Is there anything we can do to really hang up except stop recording? */
00351    ast_setstate(ast, AST_STATE_DOWN);
00352    if (ioctl(p->fd, PHONE_REC_STOP))
00353       ast_log(LOG_WARNING, "Failed to stop recording\n");
00354    if (ioctl(p->fd, PHONE_PLAY_STOP))
00355       ast_log(LOG_WARNING, "Failed to stop playing\n");
00356    if (ioctl(p->fd, PHONE_RING_STOP))
00357       ast_log(LOG_WARNING, "Failed to stop ringing\n");
00358    if (ioctl(p->fd, PHONE_CPT_STOP))
00359       ast_log(LOG_WARNING, "Failed to stop sounds\n");
00360 
00361    /* If it's an FXO, hang them up */
00362    if (p->mode == MODE_FXO) {
00363       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
00364          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",ast->name, strerror(errno));
00365    }
00366 
00367    /* If they're off hook, give a busy signal */
00368    if (ioctl(p->fd, PHONE_HOOKSTATE)) {
00369       ast_debug(1, "Got hunghup, giving busy signal\n");
00370       ioctl(p->fd, PHONE_BUSY);
00371       p->cpt = 1;
00372    }
00373    p->lastformat = -1;
00374    p->lastinput = -1;
00375    p->ministate = 0;
00376    p->obuflen = 0;
00377    p->dialtone = 0;
00378    memset(p->ext, 0, sizeof(p->ext));
00379    ((struct phone_pvt *)(ast->tech_pvt))->owner = NULL;
00380    ast_module_unref(ast_module_info->self);
00381    ast_verb(3, "Hungup '%s'\n", ast->name);
00382    ast->tech_pvt = NULL;
00383    ast_setstate(ast, AST_STATE_DOWN);
00384    restart_monitor();
00385    return 0;
00386 }
00387 
00388 static int phone_setup(struct ast_channel *ast)
00389 {
00390    struct phone_pvt *p;
00391    p = ast->tech_pvt;
00392    ioctl(p->fd, PHONE_CPT_STOP);
00393    /* Nothing to answering really, just start recording */
00394    if (ast->rawreadformat == AST_FORMAT_G729A) {
00395       /* Prefer g729 */
00396       ioctl(p->fd, PHONE_REC_STOP);
00397       if (p->lastinput != AST_FORMAT_G729A) {
00398          p->lastinput = AST_FORMAT_G729A;
00399          if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
00400             ast_log(LOG_WARNING, "Failed to set codec to g729\n");
00401             return -1;
00402          }
00403       }
00404         } else if (ast->rawreadformat == AST_FORMAT_G723_1) {
00405       ioctl(p->fd, PHONE_REC_STOP);
00406       if (p->lastinput != AST_FORMAT_G723_1) {
00407          p->lastinput = AST_FORMAT_G723_1;
00408          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00409             ast_log(LOG_WARNING, "Failed to set codec to g723.1\n");
00410             return -1;
00411          }
00412       }
00413    } else if (ast->rawreadformat == AST_FORMAT_SLINEAR) {
00414       ioctl(p->fd, PHONE_REC_STOP);
00415       if (p->lastinput != AST_FORMAT_SLINEAR) {
00416          p->lastinput = AST_FORMAT_SLINEAR;
00417          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00418             ast_log(LOG_WARNING, "Failed to set codec to signed linear 16\n");
00419             return -1;
00420          }
00421       }
00422    } else if (ast->rawreadformat == AST_FORMAT_ULAW) {
00423       ioctl(p->fd, PHONE_REC_STOP);
00424       if (p->lastinput != AST_FORMAT_ULAW) {
00425          p->lastinput = AST_FORMAT_ULAW;
00426          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00427             ast_log(LOG_WARNING, "Failed to set codec to uLaw\n");
00428             return -1;
00429          }
00430       }
00431    } else if (p->mode == MODE_FXS) {
00432       ioctl(p->fd, PHONE_REC_STOP);
00433       if (p->lastinput != ast->rawreadformat) {
00434          p->lastinput = ast->rawreadformat;
00435          if (ioctl(p->fd, PHONE_REC_CODEC, ast->rawreadformat)) {
00436             ast_log(LOG_WARNING, "Failed to set codec to %d\n", 
00437                ast->rawreadformat);
00438             return -1;
00439          }
00440       }
00441    } else {
00442       ast_log(LOG_WARNING, "Can't do format %s\n", ast_getformatname(ast->rawreadformat));
00443       return -1;
00444    }
00445    if (ioctl(p->fd, PHONE_REC_START)) {
00446       ast_log(LOG_WARNING, "Failed to start recording\n");
00447       return -1;
00448    }
00449    /* set the DTMF times (the default is too short) */
00450    ioctl(p->fd, PHONE_SET_TONE_ON_TIME, 300);
00451    ioctl(p->fd, PHONE_SET_TONE_OFF_TIME, 200);
00452    return 0;
00453 }
00454 
00455 static int phone_answer(struct ast_channel *ast)
00456 {
00457    struct phone_pvt *p;
00458    p = ast->tech_pvt;
00459    /* In case it's a LineJack, take it off hook */
00460    if (p->mode == MODE_FXO) {
00461       if (ioctl(p->fd, PHONE_PSTN_SET_STATE, PSTN_OFF_HOOK))
00462          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n", ast->name, strerror(errno));
00463       else
00464          ast_debug(1, "Took linejack off hook\n");
00465    }
00466    phone_setup(ast);
00467    ast_debug(1, "phone_answer(%s)\n", ast->name);
00468    ast->rings = 0;
00469    ast_setstate(ast, AST_STATE_UP);
00470    return 0;
00471 }
00472 
00473 #if 0
00474 static char phone_2digit(char c)
00475 {
00476    if (c == 12)
00477       return '#';
00478    else if (c == 11)
00479       return '*';
00480    else if ((c < 10) && (c >= 0))
00481       return '0' + c - 1;
00482    else
00483       return '?';
00484 }
00485 #endif
00486 
00487 static struct ast_frame  *phone_exception(struct ast_channel *ast)
00488 {
00489    int res;
00490    union telephony_exception phonee;
00491    struct phone_pvt *p = ast->tech_pvt;
00492    char digit;
00493 
00494    /* Some nice norms */
00495    p->fr.datalen = 0;
00496    p->fr.samples = 0;
00497    p->fr.data.ptr =  NULL;
00498    p->fr.src = "Phone";
00499    p->fr.offset = 0;
00500    p->fr.mallocd=0;
00501    p->fr.delivery = ast_tv(0,0);
00502    
00503    phonee.bytes = ioctl(p->fd, PHONE_EXCEPTION);
00504    if (phonee.bits.dtmf_ready)  {
00505       ast_debug(1, "phone_exception(): DTMF\n");
00506    
00507       /* We've got a digit -- Just handle this nicely and easily */
00508       digit =  ioctl(p->fd, PHONE_GET_DTMF_ASCII);
00509       p->fr.subclass = digit;
00510       p->fr.frametype = AST_FRAME_DTMF;
00511       return &p->fr;
00512    }
00513    if (phonee.bits.hookstate) {
00514       ast_debug(1, "Hookstate changed\n");
00515       res = ioctl(p->fd, PHONE_HOOKSTATE);
00516       /* See if we've gone on hook, if so, notify by returning NULL */
00517       ast_debug(1, "New hookstate: %d\n", res);
00518       if (!res && (p->mode != MODE_FXO))
00519          return NULL;
00520       else {
00521          if (ast->_state == AST_STATE_RINGING) {
00522             /* They've picked up the phone */
00523             p->fr.frametype = AST_FRAME_CONTROL;
00524             p->fr.subclass = AST_CONTROL_ANSWER;
00525             phone_setup(ast);
00526             ast_setstate(ast, AST_STATE_UP);
00527             return &p->fr;
00528          }  else 
00529             ast_log(LOG_WARNING, "Got off hook in weird state %d\n", ast->_state);
00530       }
00531    }
00532 #if 1
00533    if (phonee.bits.pstn_ring)
00534       ast_verbose("Unit is ringing\n");
00535    if (phonee.bits.caller_id) {
00536       ast_verbose("We have caller ID\n");
00537    }
00538    if (phonee.bits.pstn_wink)
00539       ast_verbose("Detected Wink\n");
00540 #endif
00541    /* Strange -- nothing there.. */
00542    p->fr.frametype = AST_FRAME_NULL;
00543    p->fr.subclass = 0;
00544    return &p->fr;
00545 }
00546 
00547 static struct ast_frame  *phone_read(struct ast_channel *ast)
00548 {
00549    int res;
00550    struct phone_pvt *p = ast->tech_pvt;
00551    
00552 
00553    /* Some nice norms */
00554    p->fr.datalen = 0;
00555    p->fr.samples = 0;
00556    p->fr.data.ptr =  NULL;
00557    p->fr.src = "Phone";
00558    p->fr.offset = 0;
00559    p->fr.mallocd=0;
00560    p->fr.delivery = ast_tv(0,0);
00561 
00562    /* Try to read some data... */
00563    CHECK_BLOCKING(ast);
00564    res = read(p->fd, p->buf, PHONE_MAX_BUF);
00565    ast_clear_flag(ast, AST_FLAG_BLOCKING);
00566    if (res < 0) {
00567 #if 0
00568       if (errno == EAGAIN) {
00569          ast_log(LOG_WARNING, "Null frame received\n");
00570          p->fr.frametype = AST_FRAME_NULL;
00571          p->fr.subclass = 0;
00572          return &p->fr;
00573       }
00574 #endif
00575       ast_log(LOG_WARNING, "Error reading: %s\n", strerror(errno));
00576       return NULL;
00577    }
00578    p->fr.data.ptr = p->buf;
00579    if (p->mode != MODE_FXS)
00580    switch(p->buf[0] & 0x3) {
00581    case '0':
00582    case '1':
00583       /* Normal */
00584       break;
00585    case '2':
00586    case '3':
00587       /* VAD/CNG, only send two words */
00588       res = 4;
00589       break;
00590    }
00591    p->fr.samples = 240;
00592    p->fr.datalen = res;
00593    p->fr.frametype = p->lastinput <= AST_FORMAT_AUDIO_MASK ?
00594                           AST_FRAME_VOICE : 
00595            p->lastinput <= AST_FORMAT_PNG ? AST_FRAME_IMAGE 
00596            : AST_FRAME_VIDEO;
00597    p->fr.subclass = p->lastinput;
00598    p->fr.offset = AST_FRIENDLY_OFFSET;
00599    /* Byteswap from little-endian to native-endian */
00600    if (p->fr.subclass == AST_FORMAT_SLINEAR)
00601       ast_frame_byteswap_le(&p->fr);
00602    return &p->fr;
00603 }
00604 
00605 static int phone_write_buf(struct phone_pvt *p, const char *buf, int len, int frlen, int swap)
00606 {
00607    int res;
00608    /* Store as much of the buffer as we can, then write fixed frames */
00609    int space = sizeof(p->obuf) - p->obuflen;
00610    /* Make sure we have enough buffer space to store the frame */
00611    if (space < len)
00612       len = space;
00613    if (swap)
00614       ast_swapcopy_samples(p->obuf+p->obuflen, buf, len/2);
00615    else
00616       memcpy(p->obuf + p->obuflen, buf, len);
00617    p->obuflen += len;
00618    while(p->obuflen > frlen) {
00619       res = write(p->fd, p->obuf, frlen);
00620       if (res != frlen) {
00621          if (res < 1) {
00622 /*
00623  * Card is in non-blocking mode now and it works well now, but there are
00624  * lot of messages like this. So, this message is temporarily disabled.
00625  */
00626             return 0;
00627          } else {
00628             ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frlen);
00629          }
00630       }
00631       p->obuflen -= frlen;
00632       /* Move memory if necessary */
00633       if (p->obuflen) 
00634          memmove(p->obuf, p->obuf + frlen, p->obuflen);
00635    }
00636    return len;
00637 }
00638 
00639 static int phone_send_text(struct ast_channel *ast, const char *text)
00640 {
00641     int length = strlen(text);
00642     return phone_write_buf(ast->tech_pvt, text, length, length, 0) == 
00643            length ? 0 : -1;
00644 }
00645 
00646 static int phone_write(struct ast_channel *ast, struct ast_frame *frame)
00647 {
00648    struct phone_pvt *p = ast->tech_pvt;
00649    int res;
00650    int maxfr=0;
00651    char *pos;
00652    int sofar;
00653    int expected;
00654    int codecset = 0;
00655    char tmpbuf[4];
00656    /* Write a frame of (presumably voice) data */
00657    if (frame->frametype != AST_FRAME_VOICE && p->mode != MODE_FXS) {
00658       if (frame->frametype != AST_FRAME_IMAGE)
00659          ast_log(LOG_WARNING, "Don't know what to do with  frame type '%d'\n", frame->frametype);
00660       return 0;
00661    }
00662    if (!(frame->subclass &
00663       (AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW | AST_FORMAT_G729A)) && 
00664        p->mode != MODE_FXS) {
00665       ast_log(LOG_WARNING, "Cannot handle frames in %d format\n", frame->subclass);
00666       return -1;
00667    }
00668 #if 0
00669    /* If we're not in up mode, go into up mode now */
00670    if (ast->_state != AST_STATE_UP) {
00671       ast_setstate(ast, AST_STATE_UP);
00672       phone_setup(ast);
00673    }
00674 #else
00675    if (ast->_state != AST_STATE_UP) {
00676       /* Don't try tos end audio on-hook */
00677       return 0;
00678    }
00679 #endif   
00680    if (frame->subclass == AST_FORMAT_G729A) {
00681       if (p->lastformat != AST_FORMAT_G729A) {
00682          ioctl(p->fd, PHONE_PLAY_STOP);
00683          ioctl(p->fd, PHONE_REC_STOP);
00684          if (ioctl(p->fd, PHONE_PLAY_CODEC, G729)) {
00685             ast_log(LOG_WARNING, "Unable to set G729 mode\n");
00686             return -1;
00687          }
00688          if (ioctl(p->fd, PHONE_REC_CODEC, G729)) {
00689             ast_log(LOG_WARNING, "Unable to set G729 mode\n");
00690             return -1;
00691          }
00692          p->lastformat = AST_FORMAT_G729A;
00693          p->lastinput = AST_FORMAT_G729A;
00694          /* Reset output buffer */
00695          p->obuflen = 0;
00696          codecset = 1;
00697       }
00698       if (frame->datalen > 80) {
00699          ast_log(LOG_WARNING, "Frame size too large for G.729 (%d bytes)\n", frame->datalen);
00700          return -1;
00701       }
00702       maxfr = 80;
00703         } else if (frame->subclass == AST_FORMAT_G723_1) {
00704       if (p->lastformat != AST_FORMAT_G723_1) {
00705          ioctl(p->fd, PHONE_PLAY_STOP);
00706          ioctl(p->fd, PHONE_REC_STOP);
00707          if (ioctl(p->fd, PHONE_PLAY_CODEC, G723_63)) {
00708             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00709             return -1;
00710          }
00711          if (ioctl(p->fd, PHONE_REC_CODEC, G723_63)) {
00712             ast_log(LOG_WARNING, "Unable to set G723.1 mode\n");
00713             return -1;
00714          }
00715          p->lastformat = AST_FORMAT_G723_1;
00716          p->lastinput = AST_FORMAT_G723_1;
00717          /* Reset output buffer */
00718          p->obuflen = 0;
00719          codecset = 1;
00720       }
00721       if (frame->datalen > 24) {
00722          ast_log(LOG_WARNING, "Frame size too large for G.723.1 (%d bytes)\n", frame->datalen);
00723          return -1;
00724       }
00725       maxfr = 24;
00726    } else if (frame->subclass == AST_FORMAT_SLINEAR) {
00727       if (p->lastformat != AST_FORMAT_SLINEAR) {
00728          ioctl(p->fd, PHONE_PLAY_STOP);
00729          ioctl(p->fd, PHONE_REC_STOP);
00730          if (ioctl(p->fd, PHONE_PLAY_CODEC, LINEAR16)) {
00731             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00732             return -1;
00733          }
00734          if (ioctl(p->fd, PHONE_REC_CODEC, LINEAR16)) {
00735             ast_log(LOG_WARNING, "Unable to set 16-bit linear mode\n");
00736             return -1;
00737          }
00738          p->lastformat = AST_FORMAT_SLINEAR;
00739          p->lastinput = AST_FORMAT_SLINEAR;
00740          codecset = 1;
00741          /* Reset output buffer */
00742          p->obuflen = 0;
00743       }
00744       maxfr = 480;
00745    } else if (frame->subclass == AST_FORMAT_ULAW) {
00746       if (p->lastformat != AST_FORMAT_ULAW) {
00747          ioctl(p->fd, PHONE_PLAY_STOP);
00748          ioctl(p->fd, PHONE_REC_STOP);
00749          if (ioctl(p->fd, PHONE_PLAY_CODEC, ULAW)) {
00750             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00751             return -1;
00752          }
00753          if (ioctl(p->fd, PHONE_REC_CODEC, ULAW)) {
00754             ast_log(LOG_WARNING, "Unable to set uLaw mode\n");
00755             return -1;
00756          }
00757          p->lastformat = AST_FORMAT_ULAW;
00758          p->lastinput = AST_FORMAT_ULAW;
00759          codecset = 1;
00760          /* Reset output buffer */
00761          p->obuflen = 0;
00762       }
00763       maxfr = 240;
00764    } else {
00765       if (p->lastformat != frame->subclass) {
00766          ioctl(p->fd, PHONE_PLAY_STOP);
00767          ioctl(p->fd, PHONE_REC_STOP);
00768          if (ioctl(p->fd, PHONE_PLAY_CODEC, frame->subclass)) {
00769             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00770                frame->subclass);
00771             return -1;
00772          }
00773          if (ioctl(p->fd, PHONE_REC_CODEC, frame->subclass)) {
00774             ast_log(LOG_WARNING, "Unable to set %d mode\n",
00775                frame->subclass);
00776             return -1;
00777          }
00778          p->lastformat = frame->subclass;
00779          p->lastinput = frame->subclass;
00780          codecset = 1;
00781          /* Reset output buffer */
00782          p->obuflen = 0;
00783       }
00784       maxfr = 480;
00785    }
00786    if (codecset) {
00787       ioctl(p->fd, PHONE_REC_DEPTH, 3);
00788       ioctl(p->fd, PHONE_PLAY_DEPTH, 3);
00789       if (ioctl(p->fd, PHONE_PLAY_START)) {
00790          ast_log(LOG_WARNING, "Failed to start playback\n");
00791          return -1;
00792       }
00793       if (ioctl(p->fd, PHONE_REC_START)) {
00794          ast_log(LOG_WARNING, "Failed to start recording\n");
00795          return -1;
00796       }
00797    }
00798    /* If we get here, we have a frame of Appropriate data */
00799    sofar = 0;
00800    pos = frame->data.ptr;
00801    while(sofar < frame->datalen) {
00802       /* Write in no more than maxfr sized frames */
00803       expected = frame->datalen - sofar;
00804       if (maxfr < expected)
00805          expected = maxfr;
00806       /* XXX Internet Phone Jack does not handle the 4-byte VAD frame properly! XXX 
00807          we have to pad it to 24 bytes still.  */
00808       if (frame->datalen == 4) {
00809          if (p->silencesupression) {
00810             memcpy(tmpbuf, frame->data.ptr, 4);
00811             expected = 24;
00812             res = phone_write_buf(p, tmpbuf, expected, maxfr, 0);
00813          }
00814          res = 4;
00815          expected=4;
00816       } else {
00817          int swap = 0;
00818 #if __BYTE_ORDER == __BIG_ENDIAN
00819          if (frame->subclass == AST_FORMAT_SLINEAR)
00820             swap = 1; /* Swap big-endian samples to little-endian as we copy */
00821 #endif
00822          res = phone_write_buf(p, pos, expected, maxfr, swap);
00823       }
00824       if (res != expected) {
00825          if ((errno != EAGAIN) && (errno != EINTR)) {
00826             if (res < 0) 
00827                ast_log(LOG_WARNING, "Write returned error (%s)\n", strerror(errno));
00828    /*
00829     * Card is in non-blocking mode now and it works well now, but there are
00830     * lot of messages like this. So, this message is temporarily disabled.
00831     */
00832 #if 0
00833             else
00834                ast_log(LOG_WARNING, "Only wrote %d of %d bytes\n", res, frame->datalen);
00835 #endif
00836             return -1;
00837          } else /* Pretend it worked */
00838             res = expected;
00839       }
00840       sofar += res;
00841       pos += res;
00842    }
00843    return 0;
00844 }
00845 
00846 static struct ast_channel *phone_new(struct phone_pvt *i, int state, char *cntx)
00847 {
00848    struct ast_channel *tmp;
00849    struct phone_codec_data queried_codec;
00850    tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, "", i->ext, i->context, 0, "Phone/%s", i->dev + 5);
00851    if (tmp) {
00852       tmp->tech = cur_tech;
00853       ast_channel_set_fd(tmp, 0, i->fd);
00854       /* XXX Switching formats silently causes kernel panics XXX */
00855       if (i->mode == MODE_FXS &&
00856           ioctl(i->fd, PHONE_QUERY_CODEC, &queried_codec) == 0) {
00857          if (queried_codec.type == LINEAR16)
00858             tmp->nativeformats =
00859             tmp->rawreadformat =
00860             tmp->rawwriteformat =
00861             AST_FORMAT_SLINEAR;
00862          else {
00863             tmp->nativeformats =
00864             tmp->rawreadformat =
00865             tmp->rawwriteformat =
00866             prefformat & ~AST_FORMAT_SLINEAR;
00867          }
00868       }
00869       else {
00870          tmp->nativeformats = prefformat;
00871          tmp->rawreadformat = prefformat;
00872          tmp->rawwriteformat = prefformat;
00873       }
00874       /* no need to call ast_setstate: the channel_alloc already did its job */
00875       if (state == AST_STATE_RING)
00876          tmp->rings = 1;
00877       tmp->tech_pvt = i;
00878       ast_copy_string(tmp->context, cntx, sizeof(tmp->context));
00879       if (!ast_strlen_zero(i->ext))
00880          ast_copy_string(tmp->exten, i->ext, sizeof(tmp->exten));
00881       else
00882          strcpy(tmp->exten, "s");
00883       if (!ast_strlen_zero(i->language))
00884          ast_string_field_set(tmp, language, i->language);
00885 
00886       /* Don't use ast_set_callerid() here because it will
00887        * generate a NewCallerID event before the NewChannel event */
00888       tmp->cid.cid_ani = ast_strdup(i->cid_num);
00889 
00890       i->owner = tmp;
00891       ast_module_ref(ast_module_info->self);
00892       if (state != AST_STATE_DOWN) {
00893          if (state == AST_STATE_RING) {
00894             ioctl(tmp->fds[0], PHONE_RINGBACK);
00895             i->cpt = 1;
00896          }
00897          if (ast_pbx_start(tmp)) {
00898             ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name);
00899             ast_hangup(tmp);
00900          }
00901       }
00902    } else
00903       ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
00904    return tmp;
00905 }
00906 
00907 static void phone_mini_packet(struct phone_pvt *i)
00908 {
00909    int res;
00910    char buf[1024];
00911    /* Ignore stuff we read... */
00912    res = read(i->fd, buf, sizeof(buf));
00913    if (res < 1) {
00914       ast_log(LOG_WARNING, "Read returned %d: %s\n", res, strerror(errno));
00915       return;
00916    }
00917 }
00918 
00919 static void phone_check_exception(struct phone_pvt *i)
00920 {
00921    int offhook=0;
00922    char digit[2] = {0 , 0};
00923    union telephony_exception phonee;
00924    /* XXX Do something XXX */
00925 #if 0
00926    ast_debug(1, "Exception!\n");
00927 #endif
00928    phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION);
00929    if (phonee.bits.dtmf_ready)  {
00930       digit[0] = ioctl(i->fd, PHONE_GET_DTMF_ASCII);
00931       if (i->mode == MODE_DIALTONE || i->mode == MODE_FXS || i->mode == MODE_SIGMA) {
00932          ioctl(i->fd, PHONE_PLAY_STOP);
00933          ioctl(i->fd, PHONE_REC_STOP);
00934          ioctl(i->fd, PHONE_CPT_STOP);
00935          i->dialtone = 0;
00936          if (strlen(i->ext) < AST_MAX_EXTENSION - 1)
00937             strncat(i->ext, digit, sizeof(i->ext) - strlen(i->ext) - 1);
00938          if ((i->mode != MODE_FXS ||
00939               !(phonee.bytes = ioctl(i->fd, PHONE_EXCEPTION)) ||
00940               !phonee.bits.dtmf_ready) &&
00941              ast_exists_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00942             /* It's a valid extension in its context, get moving! */
00943             phone_new(i, AST_STATE_RING, i->context);
00944             /* No need to restart monitor, we are the monitor */
00945          } else if (!ast_canmatch_extension(NULL, i->context, i->ext, 1, i->cid_num)) {
00946             /* There is nothing in the specified extension that can match anymore.
00947                Try the default */
00948             if (ast_exists_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00949                /* Check the default, too... */
00950                phone_new(i, AST_STATE_RING, "default");
00951                /* XXX This should probably be justified better XXX */
00952             }  else if (!ast_canmatch_extension(NULL, "default", i->ext, 1, i->cid_num)) {
00953                /* It's not a valid extension, give a busy signal */
00954                ast_debug(1, "%s can't match anything in %s or default\n", i->ext, i->context);
00955                ioctl(i->fd, PHONE_BUSY);
00956                i->cpt = 1;
00957             }
00958          }
00959 #if 0
00960          ast_verbose("Extension is %s\n", i->ext);
00961 #endif
00962       }
00963    }
00964    if (phonee.bits.hookstate) {
00965       offhook = ioctl(i->fd, PHONE_HOOKSTATE);
00966       if (offhook) {
00967          if (i->mode == MODE_IMMEDIATE) {
00968             phone_new(i, AST_STATE_RING, i->context);
00969          } else if (i->mode == MODE_DIALTONE) {
00970             ast_module_ref(ast_module_info->self);
00971             /* Reset the extension */
00972             i->ext[0] = '\0';
00973             /* Play the dialtone */
00974             i->dialtone++;
00975             ioctl(i->fd, PHONE_PLAY_STOP);
00976             ioctl(i->fd, PHONE_PLAY_CODEC, ULAW);
00977             ioctl(i->fd, PHONE_PLAY_START);
00978             i->lastformat = -1;
00979          } else if (i->mode == MODE_SIGMA) {
00980             ast_module_ref(ast_module_info->self);
00981             /* Reset the extension */
00982             i->ext[0] = '\0';
00983             /* Play the dialtone */
00984             i->dialtone++;
00985             ioctl(i->fd, PHONE_DIALTONE);
00986          }
00987       } else {
00988          if (i->dialtone)
00989             ast_module_unref(ast_module_info->self);
00990          memset(i->ext, 0, sizeof(i->ext));
00991          if (i->cpt)
00992          {
00993             ioctl(i->fd, PHONE_CPT_STOP);
00994             i->cpt = 0;
00995          }
00996          ioctl(i->fd, PHONE_PLAY_STOP);
00997          ioctl(i->fd, PHONE_REC_STOP);
00998          i->dialtone = 0;
00999          i->lastformat = -1;
01000       }
01001    }
01002    if (phonee.bits.pstn_ring) {
01003       ast_verbose("Unit is ringing\n");
01004       phone_new(i, AST_STATE_RING, i->context);
01005    }
01006    if (phonee.bits.caller_id)
01007       ast_verbose("We have caller ID\n");
01008    
01009    
01010 }
01011 
01012 static void *do_monitor(void *data)
01013 {
01014    fd_set rfds, efds;
01015    int n, res;
01016    struct phone_pvt *i;
01017    int tonepos = 0;
01018    /* The tone we're playing this round */
01019    struct timeval wait = {0,0};
01020    int dotone;
01021    /* This thread monitors all the frame relay interfaces which are not yet in use
01022       (and thus do not have a separate thread) indefinitely */
01023    while (monitor) {
01024       /* Don't let anybody kill us right away.  Nobody should lock the interface list
01025          and wait for the monitor list, but the other way around is okay. */
01026       /* Lock the interface list */
01027       if (ast_mutex_lock(&iflock)) {
01028          ast_log(LOG_ERROR, "Unable to grab interface lock\n");
01029          return NULL;
01030       }
01031       /* Build the stuff we're going to select on, that is the socket of every
01032          phone_pvt that does not have an associated owner channel */
01033       n = -1;
01034       FD_ZERO(&rfds);
01035       FD_ZERO(&efds);
01036       i = iflist;
01037       dotone = 0;
01038       while (i) {
01039          if (FD_ISSET(i->fd, &rfds)) 
01040             ast_log(LOG_WARNING, "Descriptor %d appears twice (%s)?\n", i->fd, i->dev);
01041          if (!i->owner) {
01042             /* This needs to be watched, as it lacks an owner */
01043             FD_SET(i->fd, &rfds);
01044             FD_SET(i->fd, &efds);
01045             if (i->fd > n)
01046                n = i->fd;
01047             if (i->dialtone && i->mode != MODE_SIGMA) {
01048                /* Remember we're going to have to come back and play
01049                   more dialtones */
01050                if (ast_tvzero(wait)) {
01051                   /* If we're due for a dialtone, play one */
01052                   if (write(i->fd, DialTone + tonepos, 240) != 240)
01053                      ast_log(LOG_WARNING, "Dial tone write error\n");
01054                }
01055                dotone++;
01056             }
01057          }
01058          
01059          i = i->next;
01060       }
01061       /* Okay, now that we know what to do, release the interface lock */
01062       ast_mutex_unlock(&iflock);
01063 
01064       /* Wait indefinitely for something to happen */
01065       if (dotone && i && i->mode != MODE_SIGMA) {
01066          /* If we're ready to recycle the time, set it to 30 ms */
01067          tonepos += 240;
01068          if (tonepos >= sizeof(DialTone))
01069                tonepos = 0;
01070          if (ast_tvzero(wait)) {
01071             wait = ast_tv(30000, 0);
01072          }
01073          res = ast_select(n + 1, &rfds, NULL, &efds, &wait);
01074       } else {
01075          res = ast_select(n + 1, &rfds, NULL, &efds, NULL);
01076          wait = ast_tv(0,0);
01077          tonepos = 0;
01078       }
01079       /* Okay, select has finished.  Let's see what happened.  */
01080       if (res < 0) {
01081          ast_debug(1, "select return %d: %s\n", res, strerror(errno));
01082          continue;
01083       }
01084       /* If there are no fd's changed, just continue, it's probably time
01085          to play some more dialtones */
01086       if (!res)
01087          continue;
01088       /* Alright, lock the interface list again, and let's look and see what has
01089          happened */
01090       if (ast_mutex_lock(&iflock)) {
01091          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01092          continue;
01093       }
01094 
01095       i = iflist;
01096       for(; i; i=i->next) {
01097          if (FD_ISSET(i->fd, &rfds)) {
01098             if (i->owner) {
01099                continue;
01100             }
01101             phone_mini_packet(i);
01102          }
01103          if (FD_ISSET(i->fd, &efds)) {
01104             if (i->owner) {
01105                continue;
01106             }
01107             phone_check_exception(i);
01108          }
01109       }
01110       ast_mutex_unlock(&iflock);
01111    }
01112    return NULL;
01113    
01114 }
01115 
01116 static int restart_monitor()
01117 {
01118    /* If we're supposed to be stopped -- stay stopped */
01119    if (monitor_thread == AST_PTHREADT_STOP)
01120       return 0;
01121    if (ast_mutex_lock(&monlock)) {
01122       ast_log(LOG_WARNING, "Unable to lock monitor\n");
01123       return -1;
01124    }
01125    if (monitor_thread == pthread_self()) {
01126       ast_mutex_unlock(&monlock);
01127       ast_log(LOG_WARNING, "Cannot kill myself\n");
01128       return -1;
01129    }
01130    if (monitor_thread != AST_PTHREADT_NULL) {
01131       if (ast_mutex_lock(&iflock)) {
01132          ast_mutex_unlock(&monlock);
01133          ast_log(LOG_WARNING, "Unable to lock the interface list\n");
01134          return -1;
01135       }
01136       monitor = 0;
01137       while (pthread_kill(monitor_thread, SIGURG) == 0)
01138          sched_yield();
01139       pthread_join(monitor_thread, NULL);
01140       ast_mutex_unlock(&iflock);
01141    }
01142    monitor = 1;
01143    /* Start a new monitor */
01144    if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
01145       ast_mutex_unlock(&monlock);
01146       ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
01147       return -1;
01148    }
01149    ast_mutex_unlock(&monlock);
01150    return 0;
01151 }
01152 
01153 static struct phone_pvt *mkif(const char *iface, int mode, int txgain, int rxgain)
01154 {
01155    /* Make a phone_pvt structure for this interface */
01156    struct phone_pvt *tmp;
01157    int flags;  
01158    
01159    tmp = ast_calloc(1, sizeof(*tmp));
01160    if (tmp) {
01161       tmp->fd = open(iface, O_RDWR);
01162       if (tmp->fd < 0) {
01163          ast_log(LOG_WARNING, "Unable to open '%s'\n", iface);
01164          ast_free(tmp);
01165          return NULL;
01166       }
01167       if (mode == MODE_FXO) {
01168          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_PSTN)) {
01169             ast_debug(1, "Unable to set port to PSTN\n");
01170          }
01171       } else {
01172          if (ioctl(tmp->fd, IXJCTL_PORT, PORT_POTS)) 
01173              if (mode != MODE_FXS)
01174                   ast_debug(1, "Unable to set port to POTS\n");
01175       }
01176       ioctl(tmp->fd, PHONE_PLAY_STOP);
01177       ioctl(tmp->fd, PHONE_REC_STOP);
01178       ioctl(tmp->fd, PHONE_RING_STOP);
01179       ioctl(tmp->fd, PHONE_CPT_STOP);
01180       if (ioctl(tmp->fd, PHONE_PSTN_SET_STATE, PSTN_ON_HOOK))
01181          ast_debug(1, "ioctl(PHONE_PSTN_SET_STATE) failed on %s (%s)\n",iface, strerror(errno));
01182       if (echocancel != AEC_OFF)
01183          ioctl(tmp->fd, IXJCTL_AEC_START, echocancel);
01184       if (silencesupression) 
01185          tmp->silencesupression = 1;
01186 #ifdef PHONE_VAD
01187       ioctl(tmp->fd, PHONE_VAD, tmp->silencesupression);
01188 #endif
01189       tmp->mode = mode;
01190       flags = fcntl(tmp->fd, F_GETFL);
01191       fcntl(tmp->fd, F_SETFL, flags | O_NONBLOCK);
01192       tmp->owner = NULL;
01193       tmp->lastformat = -1;
01194       tmp->lastinput = -1;
01195       tmp->ministate = 0;
01196       memset(tmp->ext, 0, sizeof(tmp->ext));
01197       ast_copy_string(tmp->language, language, sizeof(tmp->language));
01198       ast_copy_string(tmp->dev, iface, sizeof(tmp->dev));
01199       ast_copy_string(tmp->context, context, sizeof(tmp->context));
01200       tmp->next = NULL;
01201       tmp->obuflen = 0;
01202       tmp->dialtone = 0;
01203       tmp->cpt = 0;
01204       ast_copy_string(tmp->cid_num, cid_num, sizeof(tmp->cid_num));
01205       ast_copy_string(tmp->cid_name, cid_name, sizeof(tmp->cid_name));
01206       tmp->txgain = txgain;
01207       ioctl(tmp->fd, PHONE_PLAY_VOLUME, tmp->txgain);
01208       tmp->rxgain = rxgain;
01209       ioctl(tmp->fd, PHONE_REC_VOLUME, tmp->rxgain);
01210    }
01211    return tmp;
01212 }
01213 
01214 static struct ast_channel *phone_request(const char *type, int format, void *data, int *cause)
01215 {
01216    int oldformat;
01217    struct phone_pvt *p;
01218    struct ast_channel *tmp = NULL;
01219    char *name = data;
01220 
01221    /* Search for an unowned channel */
01222    if (ast_mutex_lock(&iflock)) {
01223       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01224       return NULL;
01225    }
01226    p = iflist;
01227    while(p) {
01228       if (p->mode == MODE_FXS ||
01229           format & (AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW)) {
01230           size_t length = strlen(p->dev + 5);
01231          if (strncmp(name, p->dev + 5, length) == 0 &&
01232              !isalnum(name[length])) {
01233              if (!p->owner) {
01234                      tmp = phone_new(p, AST_STATE_DOWN, p->context);
01235                      break;
01236                 } else
01237                      *cause = AST_CAUSE_BUSY;
01238             }
01239       }
01240       p = p->next;
01241    }
01242    ast_mutex_unlock(&iflock);
01243    restart_monitor();
01244    if (tmp == NULL) {
01245       oldformat = format;
01246       format &= (AST_FORMAT_G729A | AST_FORMAT_G723_1 | AST_FORMAT_SLINEAR | AST_FORMAT_ULAW);
01247       if (!format) {
01248          ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", oldformat);
01249          return NULL;
01250       }
01251    }
01252    return tmp;
01253 }
01254 
01255 /* parse gain value from config file */
01256 static int parse_gain_value(const char *gain_type, const char *value)
01257 {
01258    float gain;
01259 
01260    /* try to scan number */
01261    if (sscanf(value, "%30f", &gain) != 1)
01262    {
01263       ast_log(LOG_ERROR, "Invalid %s value '%s' in '%s' config\n",
01264          value, gain_type, config);
01265       return DEFAULT_GAIN;
01266    }
01267 
01268    /* multiplicate gain by 1.0 gain value */ 
01269    gain = gain * (float)DEFAULT_GAIN;
01270 
01271    /* percentage? */
01272    if (value[strlen(value) - 1] == '%')
01273       return (int)(gain / (float)100);
01274 
01275    return (int)gain;
01276 }
01277 
01278 static int __unload_module(void)
01279 {
01280    struct phone_pvt *p, *pl;
01281    /* First, take us out of the channel loop */
01282    if (cur_tech)
01283       ast_channel_unregister(cur_tech);
01284    if (!ast_mutex_lock(&iflock)) {
01285       /* Hangup all interfaces if they have an owner */
01286       p = iflist;
01287       while(p) {
01288          if (p->owner)
01289             ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
01290          p = p->next;
01291       }
01292       iflist = NULL;
01293       ast_mutex_unlock(&iflock);
01294    } else {
01295       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01296       return -1;
01297    }
01298    if (!ast_mutex_lock(&monlock)) {
01299       if (monitor_thread > AST_PTHREADT_NULL) {
01300          monitor = 0;
01301          while (pthread_kill(monitor_thread, SIGURG) == 0)
01302             sched_yield();
01303          pthread_join(monitor_thread, NULL);
01304       }
01305       monitor_thread = AST_PTHREADT_STOP;
01306       ast_mutex_unlock(&monlock);
01307    } else {
01308       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01309       return -1;
01310    }
01311 
01312    if (!ast_mutex_lock(&iflock)) {
01313       /* Destroy all the interfaces and free their memory */
01314       p = iflist;
01315       while(p) {
01316          /* Close the socket, assuming it's real */
01317          if (p->fd > -1)
01318             close(p->fd);
01319          pl = p;
01320          p = p->next;
01321          /* Free associated memory */
01322          ast_free(pl);
01323       }
01324       iflist = NULL;
01325       ast_mutex_unlock(&iflock);
01326    } else {
01327       ast_log(LOG_WARNING, "Unable to lock the monitor\n");
01328       return -1;
01329    }
01330       
01331    return 0;
01332 }
01333 
01334 static int unload_module(void)
01335 {
01336    return __unload_module();
01337 }
01338 
01339 static int load_module(void)
01340 {
01341    struct ast_config *cfg;
01342    struct ast_variable *v;
01343    struct phone_pvt *tmp;
01344    int mode = MODE_IMMEDIATE;
01345    int txgain = DEFAULT_GAIN, rxgain = DEFAULT_GAIN; /* default gain 1.0 */
01346    struct ast_flags config_flags = { 0 };
01347 
01348    cfg = ast_config_load(config, config_flags);
01349 
01350    /* We *must* have a config file otherwise stop immediately */
01351    if (!cfg) {
01352       ast_log(LOG_ERROR, "Unable to load config %s\n", config);
01353       return AST_MODULE_LOAD_DECLINE;
01354    }
01355    if (ast_mutex_lock(&iflock)) {
01356       /* It's a little silly to lock it, but we mind as well just to be sure */
01357       ast_log(LOG_ERROR, "Unable to lock interface list???\n");
01358       return AST_MODULE_LOAD_FAILURE;
01359    }
01360    v = ast_variable_browse(cfg, "interfaces");
01361    while(v) {
01362       /* Create the interface list */
01363       if (!strcasecmp(v->name, "device")) {
01364             tmp = mkif(v->value, mode, txgain, rxgain);
01365             if (tmp) {
01366                tmp->next = iflist;
01367                iflist = tmp;
01368                
01369             } else {
01370                ast_log(LOG_ERROR, "Unable to register channel '%s'\n", v->value);
01371                ast_config_destroy(cfg);
01372                ast_mutex_unlock(&iflock);
01373                __unload_module();
01374                return AST_MODULE_LOAD_FAILURE;
01375             }
01376       } else if (!strcasecmp(v->name, "silencesupression")) {
01377          silencesupression = ast_true(v->value);
01378       } else if (!strcasecmp(v->name, "language")) {
01379          ast_copy_string(language, v->value, sizeof(language));
01380       } else if (!strcasecmp(v->name, "callerid")) {
01381          ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
01382       } else if (!strcasecmp(v->name, "mode")) {
01383          if (!strncasecmp(v->value, "di", 2)) 
01384             mode = MODE_DIALTONE;
01385          else if (!strncasecmp(v->value, "sig", 3))
01386             mode = MODE_SIGMA;
01387          else if (!strncasecmp(v->value, "im", 2))
01388             mode = MODE_IMMEDIATE;
01389          else if (!strncasecmp(v->value, "fxs", 3)) {
01390             mode = MODE_FXS;
01391             prefformat = 0x01ff0000; /* All non-voice */
01392          }
01393          else if (!strncasecmp(v->value, "fx", 2))
01394             mode = MODE_FXO;
01395          else
01396             ast_log(LOG_WARNING, "Unknown mode: %s\n", v->value);
01397       } else if (!strcasecmp(v->name, "context")) {
01398          ast_copy_string(context, v->value, sizeof(context));
01399       } else if (!strcasecmp(v->name, "format")) {
01400          if (!strcasecmp(v->value, "g729")) {
01401             prefformat = AST_FORMAT_G729A;
01402                         } else if (!strcasecmp(v->value, "g723.1")) {
01403             prefformat = AST_FORMAT_G723_1;
01404          } else if (!strcasecmp(v->value, "slinear")) {
01405             if (mode == MODE_FXS)
01406                 prefformat |= AST_FORMAT_SLINEAR;
01407             else prefformat = AST_FORMAT_SLINEAR;
01408          } else if (!strcasecmp(v->value, "ulaw")) {
01409             prefformat = AST_FORMAT_ULAW;
01410          } else
01411             ast_log(LOG_WARNING, "Unknown format '%s'\n", v->value);
01412       } else if (!strcasecmp(v->name, "echocancel")) {
01413          if (!strcasecmp(v->value, "off")) {
01414             echocancel = AEC_OFF;
01415          } else if (!strcasecmp(v->value, "low")) {
01416             echocancel = AEC_LOW;
01417          } else if (!strcasecmp(v->value, "medium")) {
01418             echocancel = AEC_MED;
01419          } else if (!strcasecmp(v->value, "high")) {
01420             echocancel = AEC_HIGH;
01421          } else 
01422             ast_log(LOG_WARNING, "Unknown echo cancellation '%s'\n", v->value);
01423       } else if (!strcasecmp(v->name, "txgain")) {
01424          txgain = parse_gain_value(v->name, v->value);
01425       } else if (!strcasecmp(v->name, "rxgain")) {
01426          rxgain = parse_gain_value(v->name, v->value);
01427       }  
01428       v = v->next;
01429    }
01430    ast_mutex_unlock(&iflock);
01431 
01432    if (mode == MODE_FXS) {
01433       phone_tech_fxs.capabilities = prefformat;
01434       cur_tech = &phone_tech_fxs;
01435    } else
01436       cur_tech = (struct ast_channel_tech *) &phone_tech;
01437 
01438    /* Make sure we can register our Adtranphone channel type */
01439 
01440    if (ast_channel_register(cur_tech)) {
01441       ast_log(LOG_ERROR, "Unable to register channel class 'Phone'\n");
01442       ast_config_destroy(cfg);
01443       __unload_module();
01444       return AST_MODULE_LOAD_FAILURE;
01445    }
01446    ast_config_destroy(cfg);
01447    /* And start the monitor for the first time */
01448    restart_monitor();
01449    return AST_MODULE_LOAD_SUCCESS;
01450 }
01451 
01452 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Linux Telephony API Support");

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