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res_adsi.c
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res_adsi.c
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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* 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 <markster@digium.com>
*
* \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>core</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#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++) {