diff options
author | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-01-04 23:33:59 +0000 |
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committer | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-01-04 23:33:59 +0000 |
commit | 64b7b1e1613e33c852277b04fc20cb7b7bace59e (patch) | |
tree | 0a84c2b5be2406fc5bdc8808c6517345c781c942 /channels/chan_modem_i4l.c | |
parent | f903e4b53c695b11747dbc844f3664e54bab86c2 (diff) |
remove deprecated chan_modem drivers
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@7802 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'channels/chan_modem_i4l.c')
-rw-r--r-- | channels/chan_modem_i4l.c | 745 |
1 files changed, 0 insertions, 745 deletions
diff --git a/channels/chan_modem_i4l.c b/channels/chan_modem_i4l.c deleted file mode 100644 index 36a2bd802..000000000 --- a/channels/chan_modem_i4l.c +++ /dev/null @@ -1,745 +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 - * - * \author Mark Spencer <markster@digium.com> - * - * \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; -} |