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-rw-r--r--1.2-netsec/channels/chan_modem_i4l.c743
1 files changed, 0 insertions, 743 deletions
diff --git a/1.2-netsec/channels/chan_modem_i4l.c b/1.2-netsec/channels/chan_modem_i4l.c
deleted file mode 100644
index 69aa00454..000000000
--- a/1.2-netsec/channels/chan_modem_i4l.c
+++ /dev/null
@@ -1,743 +0,0 @@
-/*
- * Asterisk -- An open source telephony toolkit.
- *
- * Copyright (C) 1999 - 2005, Digium, Inc.
- *
- * Mark Spencer <markster@digium.com>
- *
- * See http://www.asterisk.org for more information about
- * the Asterisk project. Please do not directly contact
- * any of the maintainers of this project for assistance;
- * the project provides a web site, mailing lists and IRC
- * channels for your use.
- *
- * This program is free software, distributed under the terms of
- * the GNU General Public License Version 2. See the LICENSE file
- * at the top of the source tree.
- */
-
-/*! \file
- *
- * \brief ISDN4Linux TTY Driver
- *
- * \ingroup channel_drivers
- */
-
-#include <stdio.h>
-
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-
-#include "asterisk.h"
-
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-
-#include "asterisk/lock.h"
-#include "asterisk/vmodem.h"
-#include "asterisk/module.h"
-#include "asterisk/frame.h"
-#include "asterisk/logger.h"
-#include "asterisk/options.h"
-#include "asterisk/dsp.h"
-#include "asterisk/callerid.h"
-#include "asterisk/ulaw.h"
-#include "asterisk/pbx.h"
-#include "asterisk/utils.h"
-
-#define STATE_COMMAND 0
-#define STATE_VOICE 1
-
-static char *breakcmd = "\0x10\0x14\0x10\0x3";
-
-static char *desc = "ISDN4Linux Emulated Modem Driver";
-
-static int usecnt;
-AST_MUTEX_DEFINE_STATIC(usecnt_lock);
-
-static char *i4l_idents[] = {
- /* Identify ISDN4Linux Driver */
- "Linux ISDN",
- NULL
-};
-
-static int i4l_setdev(struct ast_modem_pvt *p, int dev)
-{
- char cmd[80];
- if ((dev != MODEM_DEV_TELCO) && (dev != MODEM_DEV_TELCO_SPK)) {
- ast_log(LOG_WARNING, "ISDN4Linux only supports telco device, not %d.\n", dev);
- return -1;
- } else /* Convert DEV to our understanding of it */
- dev = 2;
- 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 i4l_startrec(struct ast_modem_pvt *p)
-{
- if (ast_modem_send(p, "AT+VRX+VTX", 0) ||
- ast_modem_expect(p, "CONNECT", 5)) {
- ast_log(LOG_WARNING, "Unable to start recording\n");
- return -1;
- }
- p->ministate = STATE_VOICE;
-
- /* let ast dsp detect dtmf */
- if (p->dtmfmode & MODEM_DTMF_AST) {
- if (p->dsp) {
- ast_log(LOG_DEBUG, "Already have a dsp on %s?\n", p->dev);
- } else {
- p->dsp = ast_dsp_new();
- if (p->dsp) {
- ast_log(LOG_DEBUG, "Detecting DTMF inband with sw DSP on %s\n",p->dev);
- ast_dsp_set_features(p->dsp, DSP_FEATURE_DTMF_DETECT|DSP_FEATURE_FAX_DETECT);
- ast_dsp_digitmode(p->dsp, DSP_DIGITMODE_DTMF | 0);
- }
- }
- }
-
- return 0;
-}
-
-static int i4l_break(struct ast_modem_pvt *p)
-{
- 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;
- }
-#if 0
- /* Read any outstanding junk */
- while(!ast_modem_read_response(p, 1));
-#endif
- 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 i4l_init(struct ast_modem_pvt *p)
-{
- char cmd[256];
- if (option_debug)
- ast_log(LOG_DEBUG, "i4l_init()\n");
- if (i4l_break(p))
- return -1;
- /* Force into command mode */
- p->ministate = STATE_COMMAND;
- if (ast_modem_send(p, "AT+FCLASS=8", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to voice mode\n");
- return -1;
- }
- if (!ast_strlen_zero(p->msn)) {
- snprintf(cmd, sizeof(cmd), "AT&E%s", p->msn);
- if (ast_modem_send(p, cmd, 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set MSN to %s\n", p->msn);
- return -1;
- }
- }
- if (!ast_strlen_zero(p->incomingmsn)) {
- char *q;
- snprintf(cmd, sizeof(cmd), "AT&L%s", p->incomingmsn);
- /* translate , into ; since that is the seperator I4L uses, but can't be directly */
- /* put in the config file because it will interpret the rest of the line as comment. */
- q = cmd+4;
- while (*q) {
- if (*q == ',') *q = ';';
- ++q;
- }
- if (ast_modem_send(p, cmd, 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set Listen to %s\n", p->msn);
- return -1;
- }
- }
- if (ast_modem_send(p, "AT&D2", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to DTR disconnect mode\n");
- return -1;
- }
- if (ast_modem_send(p, "ATS18=1", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to audio only mode\n");
- return -1;
- }
- if (ast_modem_send(p, "ATS13.6=1", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to RUNG indication\n");
- return -1;
- }
- if (ast_modem_send(p, "ATS14=4", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to transparent mode\n");
- return -1;
- }
- if (ast_modem_send(p, "ATS23=9", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to transparent/ringing mode\n");
- return -1;
- }
-
- if (ast_modem_send(p, "AT+VSM=6", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to muLAW mode\n");
- return -1;
- }
- if (ast_modem_send(p, "AT+VLS=2", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to phone line interface\n");
- return -1;
- }
- p->escape = 0;
- return 0;
-}
-
-static struct ast_frame *i4l_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;
- p->fr.delivery.tv_sec = 0;
- p->fr.delivery.tv_usec = 0;
- if (esc && option_debug)
- 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 'I': /* Pseudo ringing */
- p->fr.frametype = AST_FRAME_CONTROL;
- p->fr.subclass = AST_CONTROL_RINGING;
- return &p->fr;
- case 'X': /* Pseudo connect */
- p->fr.frametype = AST_FRAME_CONTROL;
- p->fr.subclass = AST_CONTROL_ANSWER;
- if (p->owner)
- ast_setstate(p->owner, AST_STATE_UP);
- if (i4l_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 CHAR_ETX: /* End Transmission */
- return NULL;
- case 'u': /* Underrun */
- ast_log(LOG_WARNING, "Data underrun\n");
- /* Fall Through */
- 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 */
- /* Ignore */
- if (option_debug)
- ast_log(LOG_DEBUG, "Ignoring Escaped character '%c' (%d)\n", esc, esc);
- return &p->fr;
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- case '*':
- case '#':
- ast_log(LOG_DEBUG, "Detected outband DTMF digit: '%c' (%d)\n", esc, esc);
- p->fr.frametype=AST_FRAME_DTMF;
- p->fr.subclass=esc;
- return &p->fr;
- case 0: /* Pseudo signal */
- return &p->fr;
- default:
- ast_log(LOG_DEBUG, "Unknown Escaped character '%c' (%d)\n", esc, esc);
- }
- return &p->fr;
-}
-
-static struct ast_frame *i4l_read(struct ast_modem_pvt *p)
-{
- unsigned 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 */
- res = read(p->fd, result, 2);
- if (res < 2) {
- /* short read, means there was a hangup? */
- /* (or is this also possible without hangup?) */
- /* Anyway, reading from unitialized buffers is a bad idea anytime. */
- if (errno == EAGAIN)
- return i4l_handle_escape(p, 0);
- return NULL;
- }
- if (result[0] == CHAR_DLE) {
- return i4l_handle_escape(p, result[1]);
-
- } else {
- if ((result[0] == '\n') || (result[0] == '\r'))
- return i4l_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 i4l_handle_escape(p, 'X');
- } else
- if (!strcasecmp(result, "BUSY")) {
- /* Same as a busy signal */
- return i4l_handle_escape(p, 'b');
- } else
- if (!strncasecmp(result, "CALLER NUMBER: ", 15 )) {
- strncpy(p->cid_num, result + 15, sizeof(p->cid_num)-1);
- return i4l_handle_escape(p, 0);
- } else
- if (!strcasecmp(result, "RINGING")) {
- if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_3 "%s is ringing...\n", p->dev);
- return i4l_handle_escape(p, 'I');
- } else
- if (!strncasecmp(result, "RUNG", 4)) {
- /* PM2002: the line was hung up before we picked it up, bye bye */
- if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_3 "%s was hung up on before we answered\n", p->dev);
- return NULL;
- } else
- if (!strncasecmp(result, "RING", 4)) {
- if (result[4]=='/')
- strncpy(p->dnid, result + 5, sizeof(p->dnid)-1);
- return i4l_handle_escape(p, 'R');
- } else
- if (!strcasecmp(result, "NO CARRIER")) {
- if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_3 "%s hung up on\n", p->dev);
- return NULL;
- } 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;
- }
- if (option_debug)
- ast_log(LOG_DEBUG, "Modem said '%s'\n", result);
- return i4l_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 = read(p->fd, result, 240 - p->obuflen/2);
- if (res < 1) {
- /* If there's nothing there, just continue on */
- if (errno == EAGAIN)
- return i4l_handle_escape(p, 0);
- ast_log(LOG_WARNING, "Read failed: %s\n", strerror(errno));
- return NULL;
- }
-
- for (x=0;x<res;x++) {
- /* Process all the bytes that we've read */
- switch(result[x]) {
- case CHAR_DLE:
-#if 0
- ast_log(LOG_DEBUG, "Ooh, an escape at %d...\n", x);
-#endif
- if (!p->escape) {
- /* Note that next value is
- an escape, and continue. */
- p->escape++;
- break;
- } else {
- /* Send as is -- fallthrough */
- p->escape = 0;
- }
- default:
- if (p->escape) {
- ast_log(LOG_DEBUG, "Value of escape is %c (%d)...\n", result[x] < 32 ? '^' : result[x], result[x]);
- p->escape = 0;
- if (f)
- ast_log(LOG_WARNING, "Warning: Dropped a signal frame\n");
- f = i4l_handle_escape(p, result[x]);
- /* If i4l_handle_escape says NULL, say it now, doesn't matter
- what else is there, the connection is dead. */
- if (!f)
- return NULL;
- } else {
- *(b++) = AST_MULAW((int)result[x]);
- p->obuflen += 2;
- }
- }
- }
- if (f)
- break;
- }
- if (f) {
- if( ! (!(p->dtmfmode & MODEM_DTMF_I4L) && f->frametype == AST_FRAME_DTMF))
- 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.delivery.tv_sec = 0;
- p->fr.delivery.tv_usec = 0;
- p->fr.offset = AST_FRIENDLY_OFFSET;
- p->fr.src = __FUNCTION__;
- p->obuflen = 0;
-
- /* process with dsp */
- if (p->dsp) {
- f = ast_dsp_process(p->owner, p->dsp, &p->fr);
- if (f && (f->frametype == AST_FRAME_DTMF)) {
- ast_log(LOG_DEBUG, "Detected inband DTMF digit: %c on %s\n", f->subclass, p->dev);
- if (f->subclass == 'f') {
- /* Fax tone -- Handle and return NULL */
- struct ast_channel *ast = p->owner;
- if (!p->faxhandled) {
- p->faxhandled++;
- if (strcmp(ast->exten, "fax")) {
- const char *target_context = ast_strlen_zero(ast->macrocontext) ? ast->context : ast->macrocontext;
-
- if (ast_exists_extension(ast, target_context, "fax", 1, ast->cid.cid_num)) {
- if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_3 "Redirecting %s to fax extension\n", ast->name);
- /* Save the DID/DNIS when we transfer the fax call to a "fax" extension */
- pbx_builtin_setvar_helper(ast, "FAXEXTEN", ast->exten);
- if (ast_async_goto(ast, target_context, "fax", 1))
- ast_log(LOG_WARNING, "Failed to async goto '%s' into fax of '%s'\n", ast->name, target_context);
- } else
- ast_log(LOG_NOTICE, "Fax detected, but no fax extension\n");
- } else
- ast_log(LOG_DEBUG, "Already in a fax extension, not redirecting\n");
- } else
- ast_log(LOG_DEBUG, "Fax already handled\n");
- p->fr.frametype = AST_FRAME_NULL;
- p->fr.subclass = 0;
- f = &p->fr;
- }
- return f;
- }
- }
-
- return &p->fr;
- }
- return NULL;
-}
-
-static int i4l_write(struct ast_modem_pvt *p, struct ast_frame *f)
-{
-#define MAX_WRITE_SIZE 2048
- unsigned char result[MAX_WRITE_SIZE << 1];
- unsigned char b;
- int bpos=0, x;
- int res;
- if (f->datalen > MAX_WRITE_SIZE) {
- ast_log(LOG_WARNING, "Discarding too big frame of size %d\n", f->datalen);
- return -1;
- }
- if (f->frametype != AST_FRAME_VOICE) {
- ast_log(LOG_WARNING, "Don't know how to handle %d type frames\n", f->frametype);
- return -1;
- }
- if (f->subclass != AST_FORMAT_SLINEAR) {
- ast_log(LOG_WARNING, "Don't know how to handle anything but signed linear frames\n");
- return -1;
- }
- for (x=0;x<f->datalen/2;x++) {
- b = AST_LIN2MU(((short *)f->data)[x]);
- result[bpos++] = b;
- if (b == CHAR_DLE)
- result[bpos++]=b;
- }
-#if 0
- res = fwrite(result, bpos, 1, p->f);
- res *= bpos;
-#else
- res = write(p->fd, result, bpos);
-#endif
- if (res < 1) {
- if (errno != EAGAIN) {
- ast_log(LOG_WARNING, "Failed to write buffer\n");
- return -1;
- }
- }
-#if 0
- printf("Result of write is %d\n", res);
-#endif
- return 0;
-}
-
-static char *i4l_identify(struct ast_modem_pvt *p)
-{
- return strdup("Linux ISDN");
-}
-
-static void i4l_incusecnt(void)
-{
- ast_mutex_lock(&usecnt_lock);
- usecnt++;
- ast_mutex_unlock(&usecnt_lock);
- ast_update_use_count();
-}
-
-static void i4l_decusecnt(void)
-{
- ast_mutex_lock(&usecnt_lock);
- usecnt++;
- ast_mutex_unlock(&usecnt_lock);
- ast_update_use_count();
-}
-
-static int i4l_answer(struct ast_modem_pvt *p)
-{
- if (ast_modem_send(p, "ATA\r", 4) ||
- ast_modem_expect(p, "VCON", 10)) {
- ast_log(LOG_WARNING, "Unable to answer: %s", p->response);
- return -1;
- }
-#if 1
- if (ast_modem_send(p, "AT+VDD=0,8", 0) ||
- ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Unable to set to phone line interface\n");
- return -1;
- }
-#endif
- if (ast_modem_send(p, "AT+VTX+VRX", 0) ||
- ast_modem_expect(p, "CONNECT", 10)) {
- ast_log(LOG_WARNING, "Unable to answer: %s", p->response);
- return -1;
- }
- p->ministate = STATE_VOICE;
-
- /* let ast dsp detect dtmf */
- if (p->dtmfmode & MODEM_DTMF_AST) {
- if (p->dsp) {
- ast_log(LOG_DEBUG, "Already have a dsp on %s?\n", p->dev);
- } else {
- p->dsp = ast_dsp_new();
- if (p->dsp) {
- ast_log(LOG_DEBUG, "Detecting DTMF inband with sw DSP on %s\n",p->dev);
- ast_dsp_set_features(p->dsp, DSP_FEATURE_DTMF_DETECT|DSP_FEATURE_FAX_DETECT);
- ast_dsp_digitmode(p->dsp, DSP_DIGITMODE_DTMF | 0);
- }
- }
- }
-
- return 0;
-}
-
-static int i4l_dialdigit(struct ast_modem_pvt *p, char digit)
-{
- char c[2];
- if (p->ministate == STATE_VOICE) {
- if (p->dtmfmodegen & MODEM_DTMF_I4L) {
- c[0] = CHAR_DLE;
- c[1] = digit;
- write(p->fd, c, 2);
- ast_log(LOG_DEBUG, "Send ISDN out-of-band DTMF %c\n",digit);
- }
- if(p->dtmfmodegen & MODEM_DTMF_AST) {
- ast_log(LOG_DEBUG, "Generating inband DTMF\n");
- return -1;
- }
- } else
- ast_log(LOG_DEBUG, "Asked to send digit but call not up on %s\n", p->dev);
- return 0;
-}
-
-static int i4l_dial(struct ast_modem_pvt *p, char *stuff)
-{
- char cmd[80];
- char tmpmsn[255];
- struct ast_channel *c = p->owner;
-
- /* Find callerid number first, to set the correct A number */
- if (c && c->cid.cid_num && !(c->cid.cid_pres & 0x20)) {
- snprintf(tmpmsn, sizeof(tmpmsn), ",%s,", c->cid.cid_num);
- if(!ast_strlen_zero(p->outgoingmsn) && strstr(p->outgoingmsn,tmpmsn) != NULL) {
- /* Tell ISDN4Linux to use this as A number */
- snprintf(cmd, sizeof(cmd), "AT&E%s\n", c->cid.cid_num);
- if (ast_modem_send(p, cmd, strlen(cmd))) {
- ast_log(LOG_WARNING, "Unable to set A number to %s\n", c->cid.cid_num);
- }
-
- } else {
- ast_log(LOG_WARNING, "Outgoing MSN %s not allowed (see outgoingmsn=%s in modem.conf)\n",c->cid.cid_num,p->outgoingmsn);
- }
- }
-
- snprintf(cmd, sizeof(cmd), "ATD%c %s\n", p->dialtype,stuff);
- if (ast_modem_send(p, cmd, strlen(cmd))) {
- ast_log(LOG_WARNING, "Unable to dial\n");
- return -1;
- }
- return 0;
-}
-
-static int i4l_hangup(struct ast_modem_pvt *p)
-{
- char dummy[50];
- int dtr = TIOCM_DTR;
-
- /* free the memory used by the DSP */
- if (p->dsp) {
- ast_dsp_free(p->dsp);
- p->dsp = NULL;
- }
-
- /* down DTR to hangup modem */
- ioctl(p->fd, TIOCMBIC, &dtr);
- /* Read anything outstanding */
- while(read(p->fd, dummy, sizeof(dummy)) > 0);
-
- /* rise DTR to re-enable line */
- ioctl(p->fd, TIOCMBIS, &dtr);
-
- /* Read anything outstanding */
- while(read(p->fd, dummy, sizeof(dummy)) > 0);
-
- /* basically we're done, just to be sure */
- write(p->fd, "\n\n", 2);
- read(p->fd, dummy, sizeof(dummy));
- if (ast_modem_send(p, "ATH", 0)) {
- ast_log(LOG_WARNING, "Unable to hang up\n");
- return -1;
- }
- if (ast_modem_expect(p, "OK", 5)) {
- ast_log(LOG_WARNING, "Final 'OK' not received\n");
- return -1;
- }
-
- return 0;
-}
-
-static struct ast_modem_driver i4l_driver =
-{
- "i4l",
- i4l_idents,
- AST_FORMAT_SLINEAR,
- 0, /* Not full duplex */
- i4l_incusecnt, /* incusecnt */
- i4l_decusecnt, /* decusecnt */
- i4l_identify, /* identify */
- i4l_init, /* init */
- i4l_setdev, /* setdev */
- i4l_read,
- i4l_write,
- i4l_dial, /* dial */
- i4l_answer, /* answer */
- i4l_hangup, /* hangup */
- i4l_startrec, /* start record */
- NULL, /* stop record */
- NULL, /* start playback */
- NULL, /* stop playback */
- NULL, /* set silence supression */
- i4l_dialdigit, /* dialdigit */
-};
-
-
-
-int usecount(void)
-{
- return usecnt;
-}
-
-int load_module(void)
-{
- return ast_register_modem_driver(&i4l_driver);
-}
-
-int unload_module(void)
-{
- return ast_unregister_modem_driver(&i4l_driver);
-}
-
-char *description()
-{
- return desc;
-}
-
-char *key()
-{
- return ASTERISK_GPL_KEY;
-}