res_adsi.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Mark Spencer <[email protected]>
 *
 * Includes code and algorithms from the Zapata library.
 *
 * 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 ADSI support
 *
 * \author Mark Spencer <[email protected]>
 *
 * \note this module is required by app_voicemail and app_getcpeid
 * \todo Move app_getcpeid into this module
 * \todo Create a core layer so that app_voicemail does not require
 * res_adsi to load
 */

/*** MODULEINFO
 <support_level>deprecated</support_level>
 ***/

#include "asterisk.h"

#include <time.h>
#include <math.h>

#include "asterisk/ulaw.h"
#include "asterisk/alaw.h"
#include "asterisk/callerid.h"
#include "asterisk/fskmodem.h"
#include "asterisk/channel.h"
#include "asterisk/module.h"
#include "asterisk/config.h"
#include "asterisk/file.h"
#include "asterisk/adsi.h"
#include "asterisk/format_cache.h"

#define DEFAULT_ADSI_MAX_RETRIES 3

#define ADSI_MAX_INTRO 20
#define ADSI_MAX_SPEED_DIAL 6

#define ADSI_FLAG_DATAMODE (1 << 8)

static int maxretries = DEFAULT_ADSI_MAX_RETRIES;

/* Asterisk ADSI button definitions */
#define ADSI_SPEED_DIAL 10 /* 10-15 are reserved for speed dial */

static char intro[ADSI_MAX_INTRO][20];
static int aligns[ADSI_MAX_INTRO];

#define SPEEDDIAL_MAX_LEN 20
static char speeddial[ADSI_MAX_SPEED_DIAL][3][SPEEDDIAL_MAX_LEN];

static int alignment = 0;

static int adsi_begin_download(struct ast_channel *chan, char *service, unsigned char *fdn, unsigned char *sec, int version);
static int adsi_end_download(struct ast_channel *chan);
static int adsi_channel_restore(struct ast_channel *chan);
static int adsi_print(struct ast_channel *chan, char **lines, int *align, int voice);
static int adsi_load_session(struct ast_channel *chan, unsigned char *app, int ver, int data);
static int adsi_unload_session(struct ast_channel *chan);
static int adsi_transmit_message(struct ast_channel *chan, unsigned char *msg, int msglen, int msgtype);
static int adsi_transmit_message_full(struct ast_channel *chan, unsigned char *msg, int msglen, int msgtype, int dowait);
static int adsi_read_encoded_dtmf(struct ast_channel *chan, unsigned char *buf, int maxlen);
static int adsi_connect_session(unsigned char *buf, unsigned char *fdn, int ver);
static int adsi_query_cpeid(unsigned char *buf);
static int adsi_query_cpeinfo(unsigned char *buf);
static int adsi_get_cpeid(struct ast_channel *chan, unsigned char *cpeid, int voice);
static int adsi_get_cpeinfo(struct ast_channel *chan, int *width, int *height, int *buttons, int voice);
static int adsi_download_connect(unsigned char *buf, char *service, unsigned char *fdn, unsigned char *sec, int ver);
static int adsi_disconnect_session(unsigned char *buf);
static int adsi_download_disconnect(unsigned char *buf);
static int adsi_data_mode(unsigned char *buf);
static int adsi_clear_soft_keys(unsigned char *buf);
static int adsi_clear_screen(unsigned char *buf);
static int adsi_voice_mode(unsigned char *buf, int when);
static int adsi_available(struct ast_channel *chan);
static int adsi_display(unsigned char *buf, int page, int line, int just, int wrap, char *col1, char *col2);
static int adsi_set_line(unsigned char *buf, int page, int line);
static int adsi_load_soft_key(unsigned char *buf, int key, const char *llabel, const char *slabel, char *ret, int data);
static int adsi_set_keys(unsigned char *buf, unsigned char *keys);
static int adsi_input_control(unsigned char *buf, int page, int line, int display, int format, int just);
static int adsi_input_format(unsigned char *buf, int num, int dir, int wrap, char *format1, char *format2);

static int adsi_generate(unsigned char *buf, int msgtype, unsigned char *msg, int msglen, int msgnum, int last, struct ast_format *codec)
{
 int sum, x, bytes = 0;
 /* Initial carrier (imaginary) */
 float cr = 1.0, ci = 0.0, scont = 0.0;

 if (msglen > 255) {
 msglen = 255;
 }

 /* If first message, Send 150ms of MARK's */
 if (msgnum == 1) {
 for (x = 0; x < 150; x++) { /* was 150 */
 PUT_CLID_MARKMS;
 }
 }

 /* Put message type */
 PUT_CLID(msgtype);
 sum = msgtype;

 /* Put message length (plus one for the message number) */
 PUT_CLID(msglen + 1);
 sum += msglen + 1;

 /* Put message number */
 PUT_CLID(msgnum);
 sum += msgnum;

 /* Put actual message */
 for (x = 0; x < msglen; x++) {
 PUT_CLID(msg[x]);
 sum += msg[x];
 }

 /* Put 2's compliment of sum */
 PUT_CLID(256-(sum & 0xff));

#if 0
 if (last) {
 /* Put trailing marks */
 for (x = 0; x < 50; x++) {
 PUT_CLID_MARKMS;
 }
 }
#endif
 return bytes;

}

static int adsi_careful_send(struct ast_channel *chan, unsigned char *buf, int len, int *remain)
{
 /* Sends carefully on a full duplex channel by using reading for
 timing */
 struct ast_frame *inf;
 struct ast_frame outf = {
 .frametype = AST_FRAME_VOICE,
 .subclass.format = ast_format_ulaw,
 .data.ptr = buf,
 };
 int amt;

 if (remain && *remain) {
 amt = len;

 /* Send remainder if provided */
 if (amt > *remain) {
 amt = *remain;
 } else {
 *remain = *remain - amt;
 }

 outf.datalen = amt;
 outf.samples = amt;
 if (ast_write(chan, &outf)) {
 ast_log(LOG_WARNING, "Failed to carefully write frame\n");
 return -1;
 }
 /* Update pointers and lengths */
 buf += amt;
 len -= amt;
 }

 while (len) {
 amt = len;
 /* If we don't get anything at all back in a second, forget
 about it */
 if (ast_waitfor(chan, 1000) < 1) {
 return -1;
 }
 /* Detect hangup */
 if (!(inf = ast_read(chan))) {
 return -1;
 }

 /* Drop any frames that are not voice */
 if (inf->frametype != AST_FRAME_VOICE) {
 ast_frfree(inf);
 continue;
 }

 if (ast_format_cmp(inf->subclass.format, ast_format_ulaw) != AST_FORMAT_CMP_EQUAL) {
 ast_log(LOG_WARNING, "Channel not in ulaw?\n");
 ast_frfree(inf);
 return -1;
 }
 /* Send no more than they sent us */
 if (amt > inf->datalen) {
 amt = inf->datalen;
 } else if (remain) {
 *remain = inf->datalen - amt;
 }
 outf.datalen = amt;
 outf.samples = amt;
 if (ast_write(chan, &outf)) {
 ast_log(LOG_WARNING, "Failed to carefully write frame\n");
 ast_frfree(inf);
 return -1;
 }
 /* Update pointers and lengths */
 buf += amt;
 len -= amt;
 ast_frfree(inf);
 }
 return 0;
}

static int __adsi_transmit_messages(struct ast_channel *chan, unsigned char **msg, int *msglen, int *msgtype)
{
 /* msglen must be no more than 256 bits, each */
 unsigned char buf[24000 * 5];
 int pos = 0, res, x, start = 0, retries = 0, waittime, rem = 0, def;
 char ack[3];
 struct ast_frame *f;

 if (ast_channel_adsicpe(chan) == AST_ADSI_UNAVAILABLE) {
 /* Don't bother if we know they don't support ADSI */
 errno = ENOSYS;
 return -1;
 }

 while (retries < maxretries) {
 if (!(ast_channel_adsicpe(chan) & ADSI_FLAG_DATAMODE)) {
 /* Generate CAS (no SAS) */
 ast_gen_cas(buf, 0, 680, ast_format_ulaw);

 /* Send CAS */
 if (adsi_careful_send(chan, buf, 680, NULL)) {
 ast_log(LOG_WARNING, "Unable to send CAS\n");
 }

 /* Wait For DTMF result */
 waittime = 500;
 for (;;) {
 if (((res = ast_waitfor(chan, waittime)) < 1)) {
 /* Didn't get back DTMF A in time */
 ast_debug(1, "No ADSI CPE detected (%d)\n", res);
 if (!ast_channel_adsicpe(chan)) {
 ast_channel_adsicpe_set(chan, AST_ADSI_UNAVAILABLE);
 }
 errno = ENOSYS;
 return -1;
 }
 waittime = res;
 if (!(f = ast_read(chan))) {
 ast_debug(1, "Hangup in ADSI\n");
 return -1;
 }
 if (f->frametype == AST_FRAME_DTMF) {
 if (f->subclass.integer == 'A') {
 /* Okay, this is an ADSI CPE. Note this for future reference, too */
 if (!ast_channel_adsicpe(chan)) {
 ast_channel_adsicpe_set(chan, AST_ADSI_AVAILABLE);
 }
 break;
 } else {
 if (f->subclass.integer == 'D') {
 ast_debug(1, "Off-hook capable CPE only, not ADSI\n");
 } else {
 ast_log(LOG_WARNING, "Unknown ADSI response '%c'\n", f->subclass.integer);
 }
 if (!ast_channel_adsicpe(chan)) {
 ast_channel_adsicpe_set(chan, AST_ADSI_UNAVAILABLE);
 }
 errno = ENOSYS;
 ast_frfree(f);
 return -1;
 }
 }
 ast_frfree(f);
 }

 ast_debug(1, "ADSI Compatible CPE Detected\n");
 } else {
 ast_debug(1, "Already in data mode\n");
 }

 x = 0;
 pos = 0;
#if 1
 def= ast_channel_defer_dtmf(chan);
#endif
 while ((x < 6) && msg[x]) {
 if ((res = adsi_generate(buf + pos, msgtype[x], msg[x], msglen[x], x+1 - start, (x == 5) || !msg[x+1], ast_format_ulaw)) < 0) {
 ast_log(LOG_WARNING, "Failed to generate ADSI message %d on channel %s\n", x + 1, ast_channel_name(chan));
 return -1;
 }
 ast_debug(1, "Message %d, of %d input bytes, %d output bytes\n", x + 1, msglen[x], res);
 pos += res;
 x++;
 }


 rem = 0;
 res = adsi_careful_send(chan, buf, pos, &rem);
 if (!def) {
 ast_channel_undefer_dtmf(chan);
 }
 if (res) {
 return -1;
 }

 ast_debug(1, "Sent total spill of %d bytes\n", pos);

 memset(ack, 0, sizeof(ack));
 /* Get real result and check for hangup */
 if ((res = ast_readstring(chan, ack, 2, 1000, 1000, "")) < 0) {
 return -1;
 }
 if (ack[0] == 'D') {
 ast_debug(1, "Acked up to message %d\n", atoi(ack + 1)); start += atoi(ack + 1);
 if (start >= x) {
 break;
 } else {
 retries++;
 ast_debug(1, "Retransmitting (%d), from %d\n", retries, start + 1);
 }
 } else {
 retries++;
 ast_log(LOG_WARNING, "Unexpected response to ack: %s (retry %d)\n", ack, retries);
 }
 }
 if (retries >= maxretries) {
 ast_log(LOG_WARNING, "Maximum ADSI Retries (%d) exceeded\n", maxretries);
 errno = ETIMEDOUT;
 return -1;
 }
 return 0;
}

static int adsi_begin_download(struct ast_channel *chan, char *service, unsigned char *fdn, unsigned char *sec, int version)
{
 int bytes = 0;
 unsigned char buf[256];
 char ack[2];

 /* Setup the resident soft key stuff, a piece at a time */
 /* Upload what scripts we can for voicemail ahead of time */
 bytes += adsi_download_connect(buf + bytes, service, fdn, sec, version);
 if (adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DOWNLOAD, 0)) {
 return -1;
 }
 if (ast_readstring(chan, ack, 1, 10000, 10000, "")) {
 return -1;
 }
 if (ack[0] == 'B') {
 return 0;
 }
 ast_debug(1, "Download was denied by CPE\n");
 return -1;
}

static int adsi_end_download(struct ast_channel *chan)
{
 int bytes = 0;
 unsigned char buf[256];

 /* Setup the resident soft key stuff, a piece at a time */
 /* Upload what scripts we can for voicemail ahead of time */
 bytes += adsi_download_disconnect(buf + bytes);
 if (adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DOWNLOAD, 0)) {
 return -1;
 }
 return 0;
}

static int adsi_transmit_message_full(struct ast_channel *chan, unsigned char *msg, int msglen, int msgtype, int dowait)
{
 unsigned char *msgs[5] = { NULL, NULL, NULL, NULL, NULL };
 int msglens[5], msgtypes[5], newdatamode = (ast_channel_adsicpe(chan) & ADSI_FLAG_DATAMODE), res, x, waitforswitch = 0;
 RAII_VAR(struct ast_format *, writeformat, NULL, ao2_cleanup);
 RAII_VAR(struct ast_format *, readformat, NULL, ao2_cleanup);

 for (x = 0; x < msglen; x += (msg[x+1]+2)) {
 if (msg[x] == ADSI_SWITCH_TO_DATA) {
 ast_debug(1, "Switch to data is sent!\n");
 waitforswitch++;
 newdatamode = ADSI_FLAG_DATAMODE;
 }

 if (msg[x] == ADSI_SWITCH_TO_VOICE) {
 ast_debug(1, "Switch to voice is sent!\n");
 waitforswitch++;
 newdatamode = 0;
 }
 }
 msgs[0] = msg;

 msglens[0] = msglen;
 msgtypes[0] = msgtype;

 if (msglen > 253) {
 ast_log(LOG_WARNING, "Can't send ADSI message of %d bytes, too large\n", msglen);
 return -1;
 }

 ast_stopstream(chan);

 writeformat = ao2_bump(ast_channel_writeformat(chan));
 readformat = ao2_bump(ast_channel_readformat(chan));

 if (ast_set_write_format(chan, ast_format_ulaw)) {
 ast_log(LOG_WARNING, "Unable to set write format to ULAW\n");
 return -1;
 }

 if (ast_set_read_format(chan, ast_format_ulaw)) {
 ast_log(LOG_WARNING, "Unable to set read format to ULAW\n");
 if (writeformat) {
 if (ast_set_write_format(chan, writeformat)) {
 ast_log(LOG_WARNING, "Unable to restore write format to %s\n", ast_format_get_name(writeformat));
 }
 }
 return -1;
 }
 res = __adsi_transmit_messages(chan, msgs, msglens, msgtypes);

 if (dowait) {
 ast_debug(1, "Wait for switch is '%d'\n", waitforswitch);
 while (waitforswitch-- && ((res = ast_waitfordigit(chan, 1000)) > 0)) {
 res = 0;
 ast_debug(1, "Waiting for 'B'...\n");
 }
 }

 if (!res) {
 ast_channel_adsicpe_set(chan, (ast_channel_adsicpe(chan) & ~ADSI_FLAG_DATAMODE) | newdatamode);
 }

 if (writeformat) {
 ast_set_write_format(chan, writeformat);
 }
 if (readformat) {
 ast_set_read_format(chan, readformat);
 }

 if (!res) {
 res = ast_safe_sleep(chan, 100 );
 }
 return res;
}

static int adsi_transmit_message(struct ast_channel *chan, unsigned char *msg, int msglen, int msgtype)
{
 return adsi_transmit_message_full(chan, msg, msglen, msgtype, 1);
}

static inline int ccopy(unsigned char *dst, const unsigned char *src, int max)
{
 int x = 0;
 /* Carefully copy the requested data */
 while ((x < max) && src[x] && (src[x] != 0xff)) {
 dst[x] = src[x];
 x++;
 }
 return x;
}

static int adsi_load_soft_key(unsigned char *buf, int key, const char *llabel, const char *slabel, char *ret, int data)
{
 int bytes = 0;

 /* Abort if invalid key specified */
 if ((key < 2) || (key > 33)) {
 return -1;
 }

 buf[bytes++] = ADSI_LOAD_SOFTKEY;
 /* Reserve for length */
 bytes++;
 /* Which key */
 buf[bytes++] = key;

 /* Carefully copy long label */
 bytes += ccopy(buf + bytes, (const unsigned char *)llabel, 18);

 /* Place delimiter */
 buf[bytes++] = 0xff;

 /* Short label */
 bytes += ccopy(buf + bytes, (const unsigned char *)slabel, 7);


 /* If specified, copy return string */
 if (ret) {
 /* Place delimiter */
 buf[bytes++] = 0xff;
 if (data) {
 buf[bytes++] = ADSI_SWITCH_TO_DATA2;
 }
 /* Carefully copy return string */
 bytes += ccopy(buf + bytes, (const unsigned char *)ret, 20);

 }
 /* Replace parameter length */
 buf[1] = bytes - 2;
 return bytes;
}

static int adsi_connect_session(unsigned char *buf, unsigned char *fdn, int ver)
{
 int bytes = 0, x;

 /* Message type */
 buf[bytes++] = ADSI_CONNECT_SESSION;

 /* Reserve space for length */
 bytes++;

 if (fdn) {
 for (x = 0; x < 4; x++) {
 buf[bytes++] = fdn[x];
 }
 if (ver > -1) {
 buf[bytes++] = ver & 0xff;
 }
 }

 buf[1] = bytes - 2;
 return bytes;

}

static int adsi_download_connect(unsigned char *buf, char *service, unsigned char *fdn, unsigned char *sec, int ver)
{
 int bytes = 0, x;

 /* Message type */
 buf[bytes++] = ADSI_DOWNLOAD_CONNECT;

 /* Reserve space for length */
 bytes++;

 /* Primary column */
 bytes+= ccopy(buf + bytes, (unsigned char *)service, 18);

 /* Delimiter */
 buf[bytes++] = 0xff;

 for (x = 0; x < 4; x++) {
 buf[bytes++] = fdn[x];
 }

 for (x = 0; x < 4; x++) {
 buf[bytes++] = sec[x];
 }

 buf[bytes++] = ver & 0xff;

 buf[1] = bytes - 2;

 return bytes;

}

static int adsi_disconnect_session(unsigned char *buf)
{
 int bytes = 0;

 /* Message type */
 buf[bytes++] = ADSI_DISC_SESSION;

 /* Reserve space for length */
 bytes++;

 buf[1] = bytes - 2;
 return bytes;

}

static int adsi_query_cpeid(unsigned char *buf)
{
 int bytes = 0;
 buf[bytes++] = ADSI_QUERY_CPEID;
 /* Reserve space for length */
 bytes++;
 buf[1] = bytes - 2;
 return bytes;
}

static int adsi_query_cpeinfo(unsigned char *buf)
{
 int bytes = 0;
 buf[bytes++] = ADSI_QUERY_CONFIG;
 /* Reserve space for length */
 bytes++;
 buf[1] = bytes - 2;
 return bytes;
}

static int adsi_read_encoded_dtmf(struct ast_channel *chan, unsigned char *buf, int maxlen)
{
 int bytes = 0, res, gotstar = 0, pos = 0;
 unsigned char current = 0;

 memset(buf, 0, maxlen);

 while (bytes <= maxlen) {
 /* Wait up to a second for a digit */
 if (!(res = ast_waitfordigit(chan, 1000))) {
 break;
 }
 if (res == '*') {
 gotstar = 1;
 continue;
 }
 /* Ignore anything other than a digit */
 if ((res < '0') || (res > '9')) {
 continue;
 }
 res -= '0';
 if (gotstar) {
 res += 9;
 }
 if (pos) {
 pos = 0;
 buf[bytes++] = (res << 4) | current;
 } else {
 pos = 1;
 current = res;
 }
 gotstar = 0;
 }

 return bytes;
}

static int adsi_get_cpeid(struct ast_channel *chan, unsigned char *cpeid, int voice)
{
 unsigned char buf[256] = "";
 int bytes = 0, res;

 bytes += adsi_data_mode(buf);
 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);

 bytes = 0;
 bytes += adsi_query_cpeid(buf);
 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);

 /* Get response */
 res = adsi_read_encoded_dtmf(chan, cpeid, 4);
 if (res != 4) {
 ast_log(LOG_WARNING, "Got %d bytes back of encoded DTMF, expecting 4\n", res);
 res = 0;
 } else {
 res = 1;
 }

 if (voice) {
 bytes = 0;
 bytes += adsi_voice_mode(buf, 0);
 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
 /* Ignore the resulting DTMF B announcing it's in voice mode */
 ast_waitfordigit(chan, 1000);
 }
 return res;
}

static int adsi_get_cpeinfo(struct ast_channel *chan, int *width, int *height, int *buttons, int voice)
{
 unsigned char buf[256] = "";
 int bytes = 0, res;

 bytes += adsi_data_mode(buf);
 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);

 bytes = 0;
 bytes += adsi_query_cpeinfo(buf);
 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);

 /* Get width */
 if ((res = ast_readstring(chan, (char *) buf, 2, 1000, 500, "")) < 0) {
 return res;
 }
 if (strlen((char *) buf) != 2) {
 ast_log(LOG_WARNING, "Got %d bytes of width, expecting 2\n", res);
 res = 0;
 } else {
 res = 1;
 }
 if (width) {
 *width = atoi((char *) buf);
 }
 /* Get height */
 memset(buf, 0, sizeof(buf));
 if (res) {
 if ((res = ast_readstring(chan, (char *) buf, 2, 1000, 500, "")) < 0) {
 return res;
 }
 if (strlen((char *) buf) != 2) {
 ast_log(LOG_WARNING, "Got %d bytes of height, expecting 2\n", res);
 res = 0;
 } else {
 res = 1;
 }
 if (height) {
 *height = atoi((char *) buf);
 }
 }
 /* Get buttons */
 memset(buf, 0, sizeof(buf));
 if (res) {
 if ((res = ast_readstring(chan, (char *) buf, 1, 1000, 500, "")) < 0) {
 return res;
 }
 if (strlen((char *) buf) != 1) {
 ast_log(LOG_WARNING, "Got %d bytes of buttons, expecting 1\n", res);
 res = 0;
 } else {
 res = 1;
 }
 if (buttons) {
 *buttons = atoi((char *) buf);
 }
 }
 if (voice) {
 bytes = 0;
 bytes += adsi_voice_mode(buf, 0);
 adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
 /* Ignore the resulting DTMF B announcing it's in voice mode */
 ast_waitfordigit(chan, 1000);
 }
 return res;
}

static int adsi_data_mode(unsigned char *buf)
{
 int bytes = 0;

 /* Message type */
 buf[bytes++] = ADSI_SWITCH_TO_DATA;

 /* Reserve space for length */
 bytes++;

 buf[1] = bytes - 2;
 return bytes;

}

static int adsi_clear_soft_keys(unsigned char *buf)
{
 int bytes = 0;

 /* Message type */
 buf[bytes++] = ADSI_CLEAR_SOFTKEY;

 /* Reserve space for length */
 bytes++;

 buf[1] = bytes - 2;
 return bytes;

}

static int adsi_clear_screen(unsigned char *buf)
{
 int bytes = 0;

 /* Message type */
 buf[bytes++] = ADSI_CLEAR_SCREEN;

 /* Reserve space for length */
 bytes++;

 buf[1] = bytes - 2;
 return bytes;

}

static int adsi_voice_mode(unsigned char *buf, int when)
{
 int bytes = 0;

 /* Message type */
 buf[bytes++] = ADSI_SWITCH_TO_VOICE;

 /* Reserve space for length */
 bytes++;

 buf[bytes++] = when & 0x7f;

 buf[1] = bytes - 2;
 return bytes;

}

static int adsi_available(struct ast_channel *chan)
{
 int cpe = ast_channel_adsicpe(chan) & 0xff;
 if ((cpe == AST_ADSI_AVAILABLE) ||
 (cpe == AST_ADSI_UNKNOWN)) {
 return 1;
 }
 return 0;
}

static int adsi_download_disconnect(unsigned char *buf)
{
 int bytes = 0;

 /* Message type */
 buf[bytes++] = ADSI_DOWNLOAD_DISC;

 /* Reserve space for length */
 bytes++;

 buf[1] = bytes - 2;
 return bytes;

}

static int adsi_display(unsigned char *buf, int page, int line, int just, int wrap,
 char *col1, char *col2)
{
 int bytes = 0;

 /* Sanity check line number */

 if (page) {
 if (line > 4) return -1;
 } else {
 if (line > 33) return -1;
 }

 if (line < 1) {
 return -1;
 }
 /* Parameter type */
 buf[bytes++] = ADSI_LOAD_VIRTUAL_DISP;

 /* Reserve space for size */
 bytes++;

 /* Page and wrap indicator */
 buf[bytes++] = ((page & 0x1) << 7) | ((wrap & 0x1) << 6) | (line & 0x3f);

 /* Justification */
 buf[bytes++] = (just & 0x3) << 5;

 /* Omit highlight mode definition */
 buf[bytes++] = 0xff;

 /* Primary column */
 bytes+= ccopy(buf + bytes, (unsigned char *)col1, 20);

 /* Delimiter */
 buf[bytes++] = 0xff;

 /* Secondary column */
 bytes += ccopy(buf + bytes, (unsigned char *)col2, 20);

 /* Update length */
 buf[1] = bytes - 2;

 return bytes;

}

static int adsi_input_control(unsigned char *buf, int page, int line, int display, int format, int just)
{
 int bytes = 0;

 if (page) {
 if (line > 4) return -1;
 } else {
 if (line > 33) return -1;
 }

 if (line < 1) {
 return -1;
 }

 buf[bytes++] = ADSI_INPUT_CONTROL;
 bytes++;
 buf[bytes++] = ((page & 1) << 7) | (line & 0x3f);
 buf[bytes++] = ((display & 1) << 7) | ((just & 0x3) << 4) | (format & 0x7);

 buf[1] = bytes - 2;
 return bytes;
}

static int adsi_input_format(unsigned char *buf, int num, int dir, int wrap, char *format1, char *format2)
{
 int bytes = 0;

 if (ast_strlen_zero((char *) format1)) {
 return -1;
 }

 buf[bytes++] = ADSI_INPUT_FORMAT;
 bytes++;
 buf[bytes++] = ((dir & 1) << 7) | ((wrap & 1) << 6) | (num & 0x7);
 bytes += ccopy(buf + bytes, (unsigned char *) format1, 20);
 buf[bytes++] = 0xff;
 if (!ast_strlen_zero(format2)) {
 bytes += ccopy(buf + bytes, (unsigned char *) format2, 20);
 }
 buf[1] = bytes - 2;
 return bytes;
}

static int adsi_set_keys(unsigned char *buf, unsigned char *keys)
{
 int bytes = 0, x;

 /* Message type */
 buf[bytes++] = ADSI_INIT_SOFTKEY_LINE;
 /* Space for size */
 bytes++;
 /* Key definitions */
 for (x = 0; x < 6; x++) {
 buf[bytes++] = (keys[x] & 0x3f) ? keys[x] : (keys[x] | 0x1);
 }
 buf[1] = bytes - 2;
 return bytes;
}

static int adsi_set_line(unsigned char *buf, int page, int line)
{
 int bytes = 0;

 /* Sanity check line number */

 if (page) {
 if (line > 4) return -1;
 } else {
 if (line > 33) return -1;
 }

 if (line < 1) {
 return -1;
 }
 /* Parameter type */
 buf[bytes++] = ADSI_LINE_CONTROL;

 /* Reserve space for size */
 bytes++;

 /* Page and line */
 buf[bytes++] = ((page & 0x1) << 7) | (line & 0x3f);

 buf[1] = bytes - 2;
 return bytes;
}

static int total = 0;
static int speeds = 0;

static int adsi_channel_restore(struct ast_channel *chan)
{
 unsigned char dsp[256] = "", keyd[6] = "";
 int bytes, x;

 /* Start with initial display setup */
 bytes = 0;
 bytes += adsi_set_line(dsp + bytes, ADSI_INFO_PAGE, 1);

 /* Prepare key setup messages */

 if (speeds) {
 for (x = 0; x < speeds; x++) {
 keyd[x] = ADSI_SPEED_DIAL + x;
 }
 bytes += adsi_set_keys(dsp + bytes, keyd);
 }
 adsi_transmit_message_full(chan, dsp, bytes, ADSI_MSG_DISPLAY, 0);
 return 0;

}

static int adsi_print(struct ast_channel *chan, char **lines, int *alignments, int voice)
{
 unsigned char buf[4096];
 int bytes = 0, res, x;

 for (x = 0; lines[x]; x++) {
 bytes += adsi_display(buf + bytes, ADSI_INFO_PAGE, x+1, alignments[x], 0, lines[x], "");
 }
 bytes += adsi_set_line(buf + bytes, ADSI_INFO_PAGE, 1);
 if (voice) {
 bytes += adsi_voice_mode(buf + bytes, 0);
 }
 res = adsi_transmit_message_full(chan, buf, bytes, ADSI_MSG_DISPLAY, 0);
 if (voice) {
 /* Ignore the resulting DTMF B announcing it's in voice mode */
 ast_waitfordigit(chan, 1000);
 }
 return res;
}

static int adsi_load_session(struct ast_channel *chan, unsigned char *app, int ver, int data)
{
 unsigned char dsp[256] = "";
 int bytes = 0, res;
 char resp[2];

 /* Connect to session */
 bytes += adsi_connect_session(dsp + bytes, app, ver);

 if (data) {
 bytes += adsi_data_mode(dsp + bytes);
 }

 /* Prepare key setup messages */
 if (adsi_transmit_message_full(chan, dsp, bytes, ADSI_MSG_DISPLAY, 0)) {
 return -1;
 }
 if (app) {
 if ((res = ast_readstring(chan, resp, 1, 1200, 1200, "")) < 0) {
 return -1;
 }
 if (res) {
 ast_debug(1, "No response from CPE about version. Assuming not there.\n");
 return 0;
 }
 if (!strcmp(resp, "B")) {
 ast_debug(1, "CPE has script '%s' version %d already loaded\n", app, ver);
 return 1;
 } else if (!strcmp(resp, "A")) {
 ast_debug(1, "CPE hasn't script '%s' version %d already loaded\n", app, ver);
 } else {
 ast_log(LOG_WARNING, "Unexpected CPE response to script query: %s\n", resp);
 }
 } else
 return 1;
 return 0;

}

static int adsi_unload_session(struct ast_channel *chan)
{
 unsigned char dsp[256] = "";
 int bytes = 0;

 /* Connect to session */
 bytes += adsi_disconnect_session(dsp + bytes);
 bytes += adsi_voice_mode(dsp + bytes, 0);

 /* Prepare key setup messages */
 if (adsi_transmit_message_full(chan, dsp, bytes, ADSI_MSG_DISPLAY, 0)) {
 return -1;
 }

 return 0;
}

static int str2align(const char *s)
{
 if (!strncasecmp(s, "l", 1)) {
 return ADSI_JUST_LEFT;
 } else if (!strncasecmp(s, "r", 1)) {
 return ADSI_JUST_RIGHT;
 } else if (!strncasecmp(s, "i", 1)) {
 return ADSI_JUST_IND;
 } else {
 return ADSI_JUST_CENT;
 }
}

static void init_state(void)
{
 int x;

 for (x = 0; x < ADSI_MAX_INTRO; x++) {
 aligns[x] = ADSI_JUST_CENT;
 }
 ast_copy_string(intro[0], "Welcome to the", sizeof(intro[0]));
 ast_copy_string(intro[1], "Asterisk", sizeof(intro[1]));
 ast_copy_string(intro[2], "Open Source PBX", sizeof(intro[2]));
 total = 3;
 speeds = 0;
 for (x = 3; x < ADSI_MAX_INTRO; x++) {
 intro[x][0] = '\0';
 }
 memset(speeddial, 0, sizeof(speeddial));
 alignment = ADSI_JUST_CENT;
}

static void adsi_load(int reload)
{
 int x = 0;
 struct ast_config *conf = NULL;
 struct ast_variable *v;
 struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
 char *name, *sname;
 init_state();

 conf = ast_config_load("adsi.conf", config_flags);
 if (conf == CONFIG_STATUS_FILEMISSING || conf == CONFIG_STATUS_FILEUNCHANGED || conf == CONFIG_STATUS_FILEINVALID) {
 return;
 }
 for (v = ast_variable_browse(conf, "intro"); v; v = v->next) {
 if (!strcasecmp(v->name, "alignment")) {
 alignment = str2align(v->value);
 } else if (!strcasecmp(v->name, "greeting")) {
 if (x < ADSI_MAX_INTRO) {
 aligns[x] = alignment;
 ast_copy_string(intro[x], v->value, sizeof(intro[x]));
 x++;
 }
 } else if (!strcasecmp(v->name, "maxretries")) {
 if (atoi(v->value) > 0) {
 maxretries = atoi(v->value);
 }
 }
 }
 if (x) {
 total = x;
 }

 x = 0;
 for (v = ast_variable_browse(conf, "speeddial"); v; v = v->next) {
 char buf[3 * SPEEDDIAL_MAX_LEN];
 char *stringp = buf;
 ast_copy_string(buf, v->value, sizeof(buf));
 name = strsep(&stringp, ",");
 sname = strsep(&stringp, ",");
 if (!sname) {
 sname = name;
 }
 if (x < ADSI_MAX_SPEED_DIAL) {
 ast_copy_string(speeddial[x][0], v->name, sizeof(speeddial[x][0]));
 ast_copy_string(speeddial[x][1], name, 18);
 ast_copy_string(speeddial[x][2], sname, 7);
 x++;
 }
 }
 if (x) {
 speeds = x;
 }
 ast_config_destroy(conf);

 return;
}

static int reload(void)
{
 adsi_load(1);
 return 0;
}

static struct adsi_funcs res_adsi_funcs = {
 .version = AST_ADSI_VERSION,
 .begin_download = adsi_begin_download,
 .end_download = adsi_end_download,
 .channel_restore = adsi_channel_restore,
 .print = adsi_print,
 .load_session = adsi_load_session,
 .unload_session = adsi_unload_session,
 .transmit_message = adsi_transmit_message,
 .transmit_message_full = adsi_transmit_message_full,
 .read_encoded_dtmf = adsi_read_encoded_dtmf,
 .connect_session = adsi_connect_session,
 .query_cpeid = adsi_query_cpeid,
 .query_cpeinfo = adsi_query_cpeinfo,
 .get_cpeid = adsi_get_cpeid,
 .get_cpeinfo = adsi_get_cpeinfo,
 .download_connect = adsi_download_connect,
 .disconnect_session = adsi_disconnect_session,
 .download_disconnect = adsi_download_disconnect,
 .data_mode = adsi_data_mode,
 .clear_soft_keys = adsi_clear_soft_keys,
 .clear_screen = adsi_clear_screen,
 .voice_mode = adsi_voice_mode,
 .available = adsi_available,
 .display = adsi_display,
 .set_line = adsi_set_line,
 .load_soft_key = adsi_load_soft_key,
 .set_keys = adsi_set_keys,
 .input_control = adsi_input_control,
 .input_format = adsi_input_format,
};

static int load_module(void)
{
 adsi_load(0);
 ast_adsi_install_funcs(&res_adsi_funcs);
 return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module(void)
{
 /* Can't unload this once we're loaded */
 ast_adsi_install_funcs(NULL);
 return -1;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "ADSI Resource",
 .support_level = AST_MODULE_SUPPORT_DEPRECATED,
 .load = load_module,
 .unload = unload_module,
 .reload = reload,
 .load_pri = AST_MODPRI_APP_DEPEND,
);