mirror of
https://github.com/asterisk/asterisk.git
synced 2025-10-26 14:27:14 +00:00
61e446f04b
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@647 65c4cc65-6c06-0410-ace0-fbb531ad65f3
485 lines
12 KiB
C
Executable File
485 lines
12 KiB
C
Executable File
/*
|
|
* Asterisk -- A telephony toolkit for Linux.
|
|
*
|
|
* A/Open ITU-56/2 Voice Modem Driver (Rockwell, IS-101, and others)
|
|
*
|
|
* Copyright (C) 1999, Mark Spencer
|
|
*
|
|
* Mark Spencer <markster@linux-support.net>
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <asterisk/lock.h>
|
|
#include <asterisk/vmodem.h>
|
|
#include <asterisk/module.h>
|
|
#include <asterisk/frame.h>
|
|
#include <asterisk/logger.h>
|
|
#include <asterisk/options.h>
|
|
|
|
#define STATE_COMMAND 0
|
|
#define STATE_VOICE 1
|
|
|
|
#define VRA "40" /* Number of 100ms of non-ring after a ring cadence after which we consider the lien to be answered */
|
|
#define VRN "100" /* Number of 100ms of non-ring with no cadence after which we assume an answer */
|
|
|
|
static char *breakcmd = "\0x10\0x03";
|
|
|
|
static char *desc = "A/Open (Rockwell Chipset) ITU-2 VoiceModem Driver";
|
|
|
|
int usecnt;
|
|
pthread_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
|
|
|
|
static char *aopen_idents[] = {
|
|
/* Identify A/Open Modem */
|
|
"V2.210-V90_2M_DLP",
|
|
NULL
|
|
};
|
|
|
|
static int aopen_setdev(struct ast_modem_pvt *p, int dev)
|
|
{
|
|
char cmd[80];
|
|
if (ast_modem_send(p, "AT#VLS?", 0)) {
|
|
ast_log(LOG_WARNING, "Unable to select current mode %d\n", dev);
|
|
return -1;
|
|
}
|
|
if (ast_modem_read_response(p, 5)) {
|
|
ast_log(LOG_WARNING, "Unable to select device %d\n", dev);
|
|
return -1;
|
|
}
|
|
ast_modem_trim(p->response);
|
|
strncpy(cmd, p->response, sizeof(cmd)-1);
|
|
if (ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Modem did not respond properly\n");
|
|
return -1;
|
|
}
|
|
if (dev == atoi(cmd)) {
|
|
/* We're already in the right mode, don't bother changing for fear of
|
|
hanging up */
|
|
return 0;
|
|
}
|
|
snprintf(cmd, sizeof(cmd), "AT#VLS=%d", dev);
|
|
if (ast_modem_send(p, cmd, 0)) {
|
|
ast_log(LOG_WARNING, "Unable to select device %d\n", dev);
|
|
return -1;
|
|
}
|
|
if (ast_modem_read_response(p, 5)) {
|
|
ast_log(LOG_WARNING, "Unable to select device %d\n", dev);
|
|
return -1;
|
|
}
|
|
ast_modem_trim(p->response);
|
|
if (strcasecmp(p->response, "VCON") && strcasecmp(p->response, "OK")) {
|
|
ast_log(LOG_WARNING, "Unexpected reply: %s\n", p->response);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int aopen_startrec(struct ast_modem_pvt *p)
|
|
{
|
|
if (ast_modem_send(p, "AT#VRX", 0) ||
|
|
ast_modem_expect(p, "CONNECT", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to start recording\n");
|
|
return -1;
|
|
}
|
|
p->ministate = STATE_VOICE;
|
|
return 0;
|
|
}
|
|
|
|
static int aopen_break(struct ast_modem_pvt *p)
|
|
{
|
|
if (ast_modem_send(p, "\r\n", 2)) {
|
|
ast_log(LOG_WARNING, "Failed to send enter?\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, breakcmd, 2)) {
|
|
ast_log(LOG_WARNING, "Failed to break\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "\r\n", 2)) {
|
|
ast_log(LOG_WARNING, "Failed to send enter?\n");
|
|
return -1;
|
|
}
|
|
/* Read any outstanding junk */
|
|
while(!ast_modem_read_response(p, 1));
|
|
if (ast_modem_send(p, "AT", 0)) {
|
|
/* Modem might be stuck in some weird mode, try to get it out */
|
|
ast_modem_send(p, "+++", 3);
|
|
if (ast_modem_expect(p, "OK", 10)) {
|
|
ast_log(LOG_WARNING, "Modem is not responding\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT", 0)) {
|
|
ast_log(LOG_WARNING, "Modem is not responding\n");
|
|
return -1;
|
|
}
|
|
}
|
|
if (ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Modem did not respond properly\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int aopen_init(struct ast_modem_pvt *p)
|
|
{
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "aopen_init()\n");
|
|
if (aopen_break(p))
|
|
return -1;
|
|
/* Force into command mode */
|
|
p->ministate = STATE_COMMAND;
|
|
if (ast_modem_send(p, "AT#BDR=0", 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to auto-baud\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#CLS=8", 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to voice mode\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#VBS=8", 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to 8-bit mode\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#VSR=8000", 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to 8000 Hz sampling\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#VLS=0", 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to telco interface\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#VRA=" VRA, 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to 'ringback goes away' timer\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#VRN=" VRN, 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to 'ringback never came timer'\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#VTD=3F,3F,3F", 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to tone detection\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_frame *aopen_handle_escape(struct ast_modem_pvt *p, char esc)
|
|
{
|
|
/* Handle escaped characters -- but sometimes we call it directly as
|
|
a quick way to cause known responses */
|
|
p->fr.frametype = AST_FRAME_NULL;
|
|
p->fr.subclass = 0;
|
|
p->fr.data = NULL;
|
|
p->fr.datalen = 0;
|
|
p->fr.samples = 0;
|
|
p->fr.offset = 0;
|
|
p->fr.mallocd = 0;
|
|
if (esc)
|
|
ast_log(LOG_DEBUG, "Escaped character '%c'\n", esc);
|
|
|
|
switch(esc) {
|
|
case 'R': /* Pseudo ring */
|
|
p->fr.frametype = AST_FRAME_CONTROL;
|
|
p->fr.subclass = AST_CONTROL_RING;
|
|
return &p->fr;
|
|
case 'X': /* Pseudo connect */
|
|
p->fr.frametype = AST_FRAME_CONTROL;
|
|
p->fr.subclass = AST_CONTROL_RING;
|
|
if (p->owner)
|
|
ast_setstate(p->owner, AST_STATE_UP);
|
|
if (aopen_startrec(p))
|
|
return NULL;
|
|
return &p->fr;
|
|
case 'b': /* Busy signal */
|
|
p->fr.frametype = AST_FRAME_CONTROL;
|
|
p->fr.subclass = AST_CONTROL_BUSY;
|
|
return &p->fr;
|
|
case 'o': /* Overrun */
|
|
ast_log(LOG_WARNING, "Overflow on modem, flushing buffers\n");
|
|
if (ast_modem_send(p, "\0x10E", 2))
|
|
ast_log(LOG_WARNING, "Unable to flush buffers\n");
|
|
return &p->fr;
|
|
case 'u': /* Underrun */
|
|
ast_log(LOG_WARNING, "Data underrun\n");
|
|
/* Fall Through */
|
|
case CHAR_ETX: /* End Transmission */
|
|
case 'd': /* Dialtone */
|
|
case 'c': /* Calling Tone */
|
|
case 'e': /* European version */
|
|
case 'a': /* Answer Tone */
|
|
case 'f': /* Bell Answer Tone */
|
|
case 'T': /* Timing mark */
|
|
case 't': /* Handset off hook */
|
|
case 'h': /* Handset hungup */
|
|
case 0: /* Pseudo signal */
|
|
/* Ignore */
|
|
return &p->fr;
|
|
default:
|
|
ast_log(LOG_DEBUG, "Unknown Escaped character '%c' (%d)\n", esc, esc);
|
|
}
|
|
return &p->fr;
|
|
}
|
|
|
|
static struct ast_frame *aopen_read(struct ast_modem_pvt *p)
|
|
{
|
|
char result[256];
|
|
short *b;
|
|
struct ast_frame *f=NULL;
|
|
int res;
|
|
int x;
|
|
if (p->ministate == STATE_COMMAND) {
|
|
/* Read the first two bytes, first, in case it's a control message */
|
|
fread(result, 1, 2, p->f);
|
|
if (result[0] == CHAR_DLE) {
|
|
return aopen_handle_escape(p, result[1]);
|
|
|
|
} else {
|
|
if ((result[0] == '\n') || (result[0] == '\r'))
|
|
return aopen_handle_escape(p, 0);
|
|
/* Read the rest of the line */
|
|
fgets(result + 2, sizeof(result) - 2, p->f);
|
|
ast_modem_trim(result);
|
|
if (!strcasecmp(result, "VCON")) {
|
|
/* If we're in immediate mode, reply now */
|
|
if (p->mode == MODEM_MODE_IMMEDIATE)
|
|
return aopen_handle_escape(p, 'X');
|
|
} else
|
|
if (!strcasecmp(result, "BUSY")) {
|
|
/* Same as a busy signal */
|
|
return aopen_handle_escape(p, 'b');
|
|
} else
|
|
if (!strcasecmp(result, "RING")) {
|
|
return aopen_handle_escape(p, 'R');
|
|
} else
|
|
if (!strcasecmp(result, "NO DIALTONE")) {
|
|
/* There's no dialtone, so the line isn't working */
|
|
ast_log(LOG_WARNING, "Device '%s' lacking dialtone\n", p->dev);
|
|
return NULL;
|
|
}
|
|
ast_log(LOG_DEBUG, "Modem said '%s'\n", result);
|
|
return aopen_handle_escape(p, 0);
|
|
}
|
|
} else {
|
|
/* We have to be more efficient in voice mode */
|
|
b = (short *)(p->obuf + p->obuflen);
|
|
while (p->obuflen/2 < 240) {
|
|
/* Read ahead the full amount */
|
|
res = fread(result, 1, 240 - p->obuflen/2, p->f);
|
|
if (res < 1) {
|
|
/* If there's nothing there, just continue on */
|
|
if (errno == EAGAIN)
|
|
return aopen_handle_escape(p, 0);
|
|
ast_log(LOG_WARNING, "Read failed: %s\n", strerror(errno));
|
|
}
|
|
for (x=0;x<res;x++) {
|
|
/* Process all the bytes that we've read */
|
|
if (result[x] == CHAR_DLE) {
|
|
/* We assume there is no more than one signal frame among our
|
|
data. */
|
|
if (f)
|
|
ast_log(LOG_WARNING, "Warning: Dropped a signal frame\n");
|
|
f = aopen_handle_escape(p, result[x+1]);
|
|
/* If aopen_handle_escape says NULL, say it now, doesn't matter
|
|
what else is there, the connection is dead. */
|
|
if (!f)
|
|
return NULL;
|
|
} else {
|
|
/* Generate a 16-bit signed linear value from our
|
|
unsigned 8-bit value */
|
|
*(b++) = (((short)result[x]) - 127) * 0xff;
|
|
p->obuflen += 2;
|
|
}
|
|
}
|
|
if (f)
|
|
break;
|
|
}
|
|
/* If we have a control frame, return it now */
|
|
if (f)
|
|
return f;
|
|
/* If we get here, we have a complete voice frame */
|
|
p->fr.frametype = AST_FRAME_VOICE;
|
|
p->fr.subclass = AST_FORMAT_SLINEAR;
|
|
p->fr.samples = 240;
|
|
p->fr.data = p->obuf;
|
|
p->fr.datalen = p->obuflen;
|
|
p->fr.mallocd = 0;
|
|
p->fr.offset = AST_FRIENDLY_OFFSET;
|
|
p->fr.src = __FUNCTION__;
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "aopen_read(voice frame)\n");
|
|
p->obuflen = 0;
|
|
return &p->fr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int aopen_write(struct ast_modem_pvt *p, struct ast_frame *f)
|
|
{
|
|
if (option_debug)
|
|
ast_log(LOG_DEBUG, "aopen_write()\n");
|
|
return 0;
|
|
}
|
|
|
|
static char *aopen_identify(struct ast_modem_pvt *p)
|
|
{
|
|
char identity[256];
|
|
char mfr[80];
|
|
char mdl[80];
|
|
char rev[80];
|
|
ast_modem_send(p, "AT#MDL?", 0);
|
|
ast_modem_read_response(p, 5);
|
|
strncpy(mdl, p->response, sizeof(mdl)-1);
|
|
ast_modem_trim(mdl);
|
|
ast_modem_expect(p, "OK", 5);
|
|
ast_modem_send(p, "AT#MFR?", 0);
|
|
ast_modem_read_response(p, 5);
|
|
strncpy(mfr, p->response, sizeof(mfr)-1);
|
|
ast_modem_trim(mfr);
|
|
ast_modem_expect(p, "OK", 5);
|
|
ast_modem_send(p, "AT#REV?", 0);
|
|
ast_modem_read_response(p, 5);
|
|
strncpy(rev, p->response, sizeof(rev)-1);
|
|
ast_modem_trim(rev);
|
|
ast_modem_expect(p, "OK", 5);
|
|
snprintf(identity, sizeof(identity), "%s Model %s Revision %s", mfr, mdl, rev);
|
|
return strdup(identity);
|
|
}
|
|
|
|
static void aopen_incusecnt(void)
|
|
{
|
|
ast_pthread_mutex_lock(&usecnt_lock);
|
|
usecnt++;
|
|
ast_pthread_mutex_unlock(&usecnt_lock);
|
|
ast_update_use_count();
|
|
}
|
|
|
|
static void aopen_decusecnt(void)
|
|
{
|
|
ast_pthread_mutex_lock(&usecnt_lock);
|
|
usecnt++;
|
|
ast_pthread_mutex_unlock(&usecnt_lock);
|
|
ast_update_use_count();
|
|
}
|
|
|
|
static int aopen_answer(struct ast_modem_pvt *p)
|
|
{
|
|
if (ast_modem_send(p, "ATA", 0) ||
|
|
ast_modem_expect(p, "VCON", 10)) {
|
|
ast_log(LOG_WARNING, "Unable to answer: %s", p->response);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int aopen_dialdigit(struct ast_modem_pvt *p, char digit)
|
|
{
|
|
char cmd[80];
|
|
snprintf(cmd, sizeof(cmd), "AT#VTS=%c", digit);
|
|
if (ast_modem_send(p, cmd, 0) ||
|
|
ast_modem_expect(p, "VCON", 10)) {
|
|
ast_log(LOG_WARNING, "Unable to answer: %s", p->response);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int aopen_dial(struct ast_modem_pvt *p, char *stuff)
|
|
{
|
|
char cmd[80];
|
|
snprintf(cmd, sizeof(cmd), "ATD%c %s", p->dialtype,stuff);
|
|
if (ast_modem_send(p, cmd, 0)) {
|
|
ast_log(LOG_WARNING, "Unable to dial\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int aopen_hangup(struct ast_modem_pvt *p)
|
|
{
|
|
if (aopen_break(p))
|
|
return -1;
|
|
/* Hangup by switching to data, then back to voice */
|
|
if (ast_modem_send(p, "ATH", 0) ||
|
|
ast_modem_expect(p, "OK", 8)) {
|
|
ast_log(LOG_WARNING, "Unable to set to data mode\n");
|
|
return -1;
|
|
}
|
|
if (ast_modem_send(p, "AT#CLS=8", 0) ||
|
|
ast_modem_expect(p, "OK", 5)) {
|
|
ast_log(LOG_WARNING, "Unable to set to voice mode\n");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct ast_modem_driver aopen_driver =
|
|
{
|
|
"AOpen",
|
|
aopen_idents,
|
|
AST_FORMAT_SLINEAR,
|
|
0, /* Not full duplex */
|
|
aopen_incusecnt, /* incusecnt */
|
|
aopen_decusecnt, /* decusecnt */
|
|
aopen_identify, /* identify */
|
|
aopen_init, /* init */
|
|
aopen_setdev, /* setdev */
|
|
aopen_read,
|
|
aopen_write,
|
|
aopen_dial, /* dial */
|
|
aopen_answer, /* answer */
|
|
aopen_hangup, /* hangup */
|
|
aopen_startrec, /* start record */
|
|
NULL, /* stop record */
|
|
NULL, /* start playback */
|
|
NULL, /* stop playback */
|
|
NULL, /* set silence supression */
|
|
aopen_dialdigit, /* dialdigit */
|
|
};
|
|
|
|
|
|
|
|
int usecount(void)
|
|
{
|
|
int res;
|
|
ast_pthread_mutex_lock(&usecnt_lock);
|
|
res = usecnt;
|
|
ast_pthread_mutex_unlock(&usecnt_lock);
|
|
return res;
|
|
}
|
|
|
|
int load_module(void)
|
|
{
|
|
return ast_register_modem_driver(&aopen_driver);
|
|
}
|
|
|
|
int unload_module(void)
|
|
{
|
|
return ast_unregister_modem_driver(&aopen_driver);
|
|
}
|
|
|
|
char *description()
|
|
{
|
|
return desc;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|