Asterisk/apps/app_adsiprog.c

/*
 * 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 Program Asterisk ADSI Scripts into phone
 *
 * \author Mark Spencer <markster@digium.com>
 *
 * \ingroup applications
 */

/*! \li \ref app_adsiprog.c uses the configuration file \ref adsi.conf
 * \addtogroup configuration_file Configuration Files
 */

/*!
 * \page adsi.conf adsi.conf
 * \verbinclude adsi.conf.sample
 */

/*** MODULEINFO
	<depend>res_adsi</depend>
	<support_level>extended</support_level>
 ***/

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include <netinet/in.h>
#include <ctype.h>

#include "asterisk/paths.h" /* use ast_config_AST_CONFIG_DIR */
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/adsi.h"
#include "asterisk/utils.h"
#include "asterisk/lock.h"

static const char app[] = "ADSIProg";

/*** DOCUMENTATION
	<application name="ADSIProg" language="en_US">
		<synopsis>
			Load Asterisk ADSI Scripts into phone
		</synopsis>
		<syntax>
			<parameter name="script" required="false">
				<para>adsi script to use. If not given uses the default script <filename>asterisk.adsi</filename></para>
			</parameter>
		</syntax>
		<description>
			<para>This application programs an ADSI Phone with the given script</para>
		</description>
		<see-also>
			<ref type="application">GetCPEID</ref>
			<ref type="filename">adsi.conf</ref>
		</see-also>
	</application>
 ***/

/* #define DUMP_MESSAGES */

struct adsi_event {
	int id;
	const char *name;
};

static const struct adsi_event events[] = {
	{ 1, "CALLERID" },
	{ 2, "VMWI" },
	{ 3, "NEARANSWER" },
	{ 4, "FARANSWER" },
	{ 5, "ENDOFRING" },
	{ 6, "IDLE" },
	{ 7, "OFFHOOK" },
	{ 8, "CIDCW" },
	{ 9, "BUSY" },
	{ 10, "FARRING" },
	{ 11, "DIALTONE" },
	{ 12, "RECALL" },
	{ 13, "MESSAGE" },
	{ 14, "REORDER" },
	{ 15, "DISTINCTIVERING" },
	{ 16, "RING" },
	{ 17, "REMINDERRING" },
	{ 18, "SPECIALRING" },
	{ 19, "CODEDRING" },
	{ 20, "TIMER" },
	{ 21, "INUSE" },
	{ 22, "EVENT22" },
	{ 23, "EVENT23" },
	{ 24, "CPEID" },
};

static const struct adsi_event justify[] = {
	{ 0, "CENTER" },
	{ 1, "RIGHT" },
	{ 2, "LEFT" },
	{ 3, "INDENT" },
};

#define STATE_NORMAL 0
#define STATE_INKEY  1
#define STATE_INSUB  2
#define STATE_INIF   3

#define MAX_RET_CODE 20
#define MAX_SUB_LEN  255
#define MAX_MAIN_LEN 1600

#define ARG_STRING (1 << 0)
#define ARG_NUMBER (1 << 1)

struct adsi_soft_key {
	char vname[40];  /* Which "variable" is associated with it */
	int retstrlen;   /* Length of return string */
	int initlen;     /* initial length */
	int id;
	int defined;
	char retstr[80]; /* Return string data */
};

struct adsi_subscript {
	char vname[40];
	int id;
	int defined;
	int datalen;
	int inscount;
	int ifinscount;
	char *ifdata;
	char data[2048];
};

struct adsi_state {
	char vname[40];
	int id;
};

struct adsi_flag {
	char vname[40];
	int id;
};

struct adsi_display {
	char vname[40];
	int id;
	char data[70];
	int datalen;
};

struct adsi_script {
	int state;
	int numkeys;
	int numsubs;
	int numstates;
	int numdisplays;
	int numflags;
	struct adsi_soft_key *key;
	struct adsi_subscript *sub;
	/* Pre-defined displays */
	struct adsi_display displays[63];
	/* ADSI States 1 (initial) - 254 */
	struct adsi_state states[256];
	/* Keys 2-63 */
	struct adsi_soft_key keys[62];
	/* Subscripts 0 (main) to 127 */
	struct adsi_subscript subs[128];
	/* Flags 1-7 */
	struct adsi_flag flags[7];

	/* Stuff from adsi script */
	unsigned char sec[5];
	char desc[19];
	unsigned char fdn[5];
	int ver;
};


static int process_token(void *out, char *src, int maxlen, int argtype)
{
	if ((strlen(src) > 1) && src[0] == '\"') {
		/* This is a quoted string */
		if (!(argtype & ARG_STRING))
			return -1;
		src++;
		/* Don't take more than what's there */
		if (maxlen > strlen(src) - 1)
			maxlen = strlen(src) - 1;
		memcpy(out, src, maxlen);
		((char *)out)[maxlen] = '\0';
	} else if (!ast_strlen_zero(src) && (src[0] == '\\')) {
		if (!(argtype & ARG_NUMBER))
			return -1;
		/* Octal value */
		if (sscanf(src, "%30o", (unsigned *)out) != 1)
			return -1;
		if (argtype & ARG_STRING) {
			/* Convert */
			*((unsigned int *)out) = htonl(*((unsigned int *)out));
		}
	} else if ((strlen(src) > 2) && (src[0] == '0') && (tolower(src[1]) == 'x')) {
		if (!(argtype & ARG_NUMBER))
			return -1;
		/* Hex value */
		if (sscanf(src + 2, "%30x", (unsigned int *)out) != 1)
			return -1;
		if (argtype & ARG_STRING) {
			/* Convert */
			*((unsigned int *)out) = htonl(*((unsigned int *)out));
		}
	} else if ((!ast_strlen_zero(src) && isdigit(src[0]))) {
		if (!(argtype & ARG_NUMBER))
			return -1;
		/* Hex value */
		if (sscanf(src, "%30d", (int *)out) != 1)
			return -1;
		if (argtype & ARG_STRING) {
			/* Convert */
			*((unsigned int *)out) = htonl(*((unsigned int *)out));
		}
	} else
		return -1;
	return 0;
}

static char *get_token(char **buf, const char *script, int lineno)
{
	char *tmp = *buf, *keyword;
	int quoted = 0;

	/* Advance past any white space */
	while(*tmp && (*tmp < 33))
		tmp++;
	if (!*tmp)
		return NULL;
	keyword = tmp;
	while(*tmp && ((*tmp > 32)  || quoted)) {
		if (*tmp == '\"') {
			quoted = !quoted;
		}
		tmp++;
	}
	if (quoted) {
		ast_log(LOG_WARNING, "Mismatched quotes at line %d of %s\n", lineno, script);
		return NULL;
	}
	*tmp = '\0';
	tmp++;
	while(*tmp && (*tmp < 33))
		tmp++;
	/* Note where we left off */
	*buf = tmp;
	return keyword;
}

static char *validdtmf = "123456789*0#ABCD";

static int send_dtmf(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char dtmfstr[80], *a;
	int bytes = 0;

	if (!(a = get_token(&args, script, lineno))) {
		ast_log(LOG_WARNING, "Expecting something to send for SENDDTMF at line %d of %s\n", lineno, script);
		return 0;
	}

	if (process_token(dtmfstr, a, sizeof(dtmfstr) - 1, ARG_STRING)) {
		ast_log(LOG_WARNING, "Invalid token for SENDDTMF at line %d of %s\n", lineno, script);
		return 0;
	}

	a = dtmfstr;

	while (*a) {
		if (strchr(validdtmf, *a)) {
			*buf = *a;
			buf++;
			bytes++;
		} else
			ast_log(LOG_WARNING, "'%c' is not a valid DTMF tone at line %d of %s\n", *a, lineno, script);
		a++;
	}

	return bytes;
}

static int goto_line(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *page = get_token(&args, script, lineno);
	char *gline = get_token(&args, script, lineno);
	int line;
	unsigned char cmd;

	if (!page || !gline) {
		ast_log(LOG_WARNING, "Expecting page and line number for GOTOLINE at line %d of %s\n", lineno, script);
		return 0;
	}

	if (!strcasecmp(page, "INFO"))
		cmd = 0;
	else if (!strcasecmp(page, "COMM"))
		cmd = 0x80;
	else {
		ast_log(LOG_WARNING, "Expecting either 'INFO' or 'COMM' page, got '%s' at line %d of %s\n", page, lineno, script);
		return 0;
	}

	if (process_token(&line, gline, sizeof(line), ARG_NUMBER)) {
		ast_log(LOG_WARNING, "Invalid line number '%s' at line %d of %s\n", gline, lineno, script);
		return 0;
	}

	cmd |= line;
	buf[0] = 0x8b;
	buf[1] = cmd;

	return 2;
}

static int goto_line_rel(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *dir = get_token(&args, script, lineno);
	char *gline = get_token(&args, script, lineno);
	int line;
	unsigned char cmd;

	if (!dir || !gline) {
		ast_log(LOG_WARNING, "Expecting direction and number of lines for GOTOLINEREL at line %d of %s\n", lineno, script);
		return 0;
	}

	if (!strcasecmp(dir, "UP"))
		cmd = 0;
	else if (!strcasecmp(dir, "DOWN"))
		cmd = 0x20;
	else {
		ast_log(LOG_WARNING, "Expecting either 'UP' or 'DOWN' direction, got '%s' at line %d of %s\n", dir, lineno, script);
		return 0;
	}

	if (process_token(&line, gline, sizeof(line), ARG_NUMBER)) {
		ast_log(LOG_WARNING, "Invalid line number '%s' at line %d of %s\n", gline, lineno, script);
		return 0;
	}

	cmd |= line;
	buf[0] = 0x8c;
	buf[1] = cmd;

	return 2;
}

static int send_delay(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *gtime = get_token(&args, script, lineno);
	int ms;

	if (!gtime) {
		ast_log(LOG_WARNING, "Expecting number of milliseconds to wait at line %d of %s\n", lineno, script);
		return 0;
	}

	if (process_token(&ms, gtime, sizeof(ms), ARG_NUMBER)) {
		ast_log(LOG_WARNING, "Invalid delay milliseconds '%s' at line %d of %s\n", gtime, lineno, script);
		return 0;
	}

	buf[0] = 0x90;

	if (id == 11)
		buf[1] = ms / 100;
	else
		buf[1] = ms / 10;

	return 2;
}

static int set_state(char *buf, char *name, int id, char *args, struct adsi_script *istate, const char *script, int lineno)
{
	char *gstate = get_token(&args, script, lineno);
	int state;

	if (!gstate) {
		ast_log(LOG_WARNING, "Expecting state number at line %d of %s\n", lineno, script);
		return 0;
	}

	if (process_token(&state, gstate, sizeof(state), ARG_NUMBER)) {
		ast_log(LOG_WARNING, "Invalid state number '%s' at line %d of %s\n", gstate, lineno, script);
		return 0;
	}

	buf[0] = id;
	buf[1] = state;

	return 2;
}

static int cleartimer(char *buf, char *name, int id, char *args, struct adsi_script *istate, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);

	if (tok)
		ast_log(LOG_WARNING, "Clearing timer requires no arguments ('%s') at line %d of %s\n", tok, lineno, script);

	buf[0] = id;

	/* For some reason the clear code is different slightly */
	if (id == 7)
		buf[1] = 0x10;
	else
		buf[1] = 0x00;

	return 2;
}

static struct adsi_flag *getflagbyname(struct adsi_script *state, char *name, const char *script, int lineno, int create)
{
	int x;

	for (x = 0; x < state->numflags; x++) {
		if (!strcasecmp(state->flags[x].vname, name))
			return &state->flags[x];
	}

	/* Return now if we're not allowed to create */
	if (!create)
		return NULL;

	if (state->numflags > 6) {
		ast_log(LOG_WARNING, "No more flag space at line %d of %s\n", lineno, script);
		return NULL;
	}

	ast_copy_string(state->flags[state->numflags].vname, name, sizeof(state->flags[state->numflags].vname));
	state->flags[state->numflags].id = state->numflags + 1;
	state->numflags++;

	return &state->flags[state->numflags-1];
}

static int setflag(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);
	char sname[80];
	struct adsi_flag *flag;

	if (!tok) {
		ast_log(LOG_WARNING, "Setting flag requires a flag number at line %d of %s\n", lineno, script);
		return 0;
	}

	if (process_token(sname, tok, sizeof(sname) - 1, ARG_STRING)) {
		ast_log(LOG_WARNING, "Invalid flag '%s' at line %d of %s\n", tok, lineno, script);
		return 0;
	}

	if (!(flag = getflagbyname(state, sname, script, lineno, 0))) {
		ast_log(LOG_WARNING, "Flag '%s' is undeclared at line %d of %s\n", sname, lineno, script);
		return 0;
	}

	buf[0] = id;
	buf[1] = ((flag->id & 0x7) << 4) | 1;

	return 2;
}

static int clearflag(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);
	struct adsi_flag *flag;
	char sname[80];

	if (!tok) {
		ast_log(LOG_WARNING, "Clearing flag requires a flag number at line %d of %s\n", lineno, script);
		return 0;
	}

	if (process_token(sname, tok, sizeof(sname) - 1, ARG_STRING)) {
		ast_log(LOG_WARNING, "Invalid flag '%s' at line %d of %s\n", tok, lineno, script);
		return 0;
	}

	if (!(flag = getflagbyname(state, sname, script, lineno, 0))) {
		ast_log(LOG_WARNING, "Flag '%s' is undeclared at line %d of %s\n", sname, lineno, script);
		return 0;
	}

	buf[0] = id;
	buf[1] = ((flag->id & 0x7) << 4);

	return 2;
}

static int starttimer(char *buf, char *name, int id, char *args, struct adsi_script *istate, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);
	int secs;

	if (!tok) {
		ast_log(LOG_WARNING, "Missing number of seconds at line %d of %s\n", lineno, script);
		return 0;
	}

	if (process_token(&secs, tok, sizeof(secs), ARG_NUMBER)) {
		ast_log(LOG_WARNING, "Invalid number of seconds '%s' at line %d of %s\n", tok, lineno, script);
		return 0;
	}

	buf[0] = id;
	buf[1] = 0x1;
	buf[2] = secs;

	return 3;
}

static int geteventbyname(char *name)
{
	int x;

	for (x = 0; x < ARRAY_LEN(events); x++) {
		if (!strcasecmp(events[x].name, name))
			return events[x].id;
	}

	return 0;
}

static int getjustifybyname(char *name)
{
	int x;

	for (x = 0; x < ARRAY_LEN(justify); x++) {
		if (!strcasecmp(justify[x].name, name))
			return justify[x].id;
	}

	return -1;
}

static struct adsi_soft_key *getkeybyname(struct adsi_script *state, char *name, const char *script, int lineno)
{
	int x;

	for (x = 0; x < state->numkeys; x++) {
		if (!strcasecmp(state->keys[x].vname, name))
			return &state->keys[x];
	}

	if (state->numkeys > 61) {
		ast_log(LOG_WARNING, "No more key space at line %d of %s\n", lineno, script);
		return NULL;
	}

	ast_copy_string(state->keys[state->numkeys].vname, name, sizeof(state->keys[state->numkeys].vname));
	state->keys[state->numkeys].id = state->numkeys + 2;
	state->numkeys++;

	return &state->keys[state->numkeys-1];
}

static struct adsi_subscript *getsubbyname(struct adsi_script *state, char *name, const char *script, int lineno)
{
	int x;

	for (x = 0; x < state->numsubs; x++) {
		if (!strcasecmp(state->subs[x].vname, name))
			return &state->subs[x];
	}

	if (state->numsubs > 127) {
		ast_log(LOG_WARNING, "No more subscript space at line %d of %s\n", lineno, script);
		return NULL;
	}

	ast_copy_string(state->subs[state->numsubs].vname, name, sizeof(state->subs[state->numsubs].vname));
	state->subs[state->numsubs].id = state->numsubs;
	state->numsubs++;

	return &state->subs[state->numsubs-1];
}

static struct adsi_state *getstatebyname(struct adsi_script *state, char *name, const char *script, int lineno, int create)
{
	int x;

	for (x = 0; x <state->numstates; x++) {
		if (!strcasecmp(state->states[x].vname, name))
			return &state->states[x];
	}

	/* Return now if we're not allowed to create */
	if (!create)
		return NULL;

	if (state->numstates > 253) {
		ast_log(LOG_WARNING, "No more state space at line %d of %s\n", lineno, script);
		return NULL;
	}

	ast_copy_string(state->states[state->numstates].vname, name, sizeof(state->states[state->numstates].vname));
	state->states[state->numstates].id = state->numstates + 1;
	state->numstates++;

	return &state->states[state->numstates-1];
}

static struct adsi_display *getdisplaybyname(struct adsi_script *state, char *name, const char *script, int lineno, int create)
{
	int x;

	for (x = 0; x < state->numdisplays; x++) {
		if (!strcasecmp(state->displays[x].vname, name))
			return &state->displays[x];
	}

	/* Return now if we're not allowed to create */
	if (!create)
		return NULL;

	if (state->numdisplays > 61) {
		ast_log(LOG_WARNING, "No more display space at line %d of %s\n", lineno, script);
		return NULL;
	}

	ast_copy_string(state->displays[state->numdisplays].vname, name, sizeof(state->displays[state->numdisplays].vname));
	state->displays[state->numdisplays].id = state->numdisplays + 1;
	state->numdisplays++;

	return &state->displays[state->numdisplays-1];
}

static int showkeys(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *tok, newkey[80];
	int bytes, x, flagid = 0;
	unsigned char keyid[6];
	struct adsi_soft_key *key;
	struct adsi_flag *flag;

	for (x = 0; x < 7; x++) {
		/* Up to 6 key arguments */
		if (!(tok = get_token(&args, script, lineno)))
			break;
		if (!strcasecmp(tok, "UNLESS")) {
			/* Check for trailing UNLESS flag */
			if (!(tok = get_token(&args, script, lineno)))
				ast_log(LOG_WARNING, "Missing argument for UNLESS clause at line %d of %s\n", lineno, script);
			else if (process_token(newkey, tok, sizeof(newkey) - 1, ARG_STRING))
				ast_log(LOG_WARNING, "Invalid flag name '%s' at line %d of %s\n", tok, lineno, script);
			else if (!(flag = getflagbyname(state, newkey, script, lineno, 0)))
				ast_log(LOG_WARNING, "Flag '%s' is undeclared at line %d of %s\n", newkey, lineno, script);
			else
				flagid = flag->id;
			if ((tok = get_token(&args, script, lineno)))
				ast_log(LOG_WARNING, "Extra arguments after UNLESS clause: '%s' at line %d of %s\n", tok, lineno, script);
			break;
		}
		if (x > 5) {
			ast_log(LOG_WARNING, "Only 6 keys can be defined, ignoring '%s' at line %d of %s\n", tok, lineno, script);
			break;
		}
		if (process_token(newkey, tok, sizeof(newkey) - 1, ARG_STRING)) {
			ast_log(LOG_WARNING, "Invalid token for key name: %s\n", tok);
			continue;
		}

		if (!(key = getkeybyname(state, newkey, script, lineno)))
			break;
		keyid[x] = key->id;
	}
	buf[0] = id;
	buf[1] = (flagid & 0x7) << 3 | (x & 0x7);
	for (bytes = 0; bytes < x; bytes++)
		buf[bytes + 2] = keyid[bytes];

	return 2 + x;
}

static int showdisplay(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *tok, dispname[80];
	int line = 0, flag = 0, cmd = 3;
	struct adsi_display *disp;

	/* Get display */
	if (!(tok = get_token(&args, script, lineno)) || process_token(dispname, tok, sizeof(dispname) - 1, ARG_STRING)) {
		ast_log(LOG_WARNING, "Invalid display name: %s at line %d of %s\n", tok ? tok : "<nothing>", lineno, script);
		return 0;
	}

	if (!(disp = getdisplaybyname(state, dispname, script, lineno, 0))) {
		ast_log(LOG_WARNING, "Display '%s' is undefined at line %d of %s\n", dispname, lineno, script);
		return 0;
	}

	if (!(tok = get_token(&args, script, lineno)) || strcasecmp(tok, "AT")) {
		ast_log(LOG_WARNING, "Missing token 'AT' at line %d of %s\n", lineno, script);
		return 0;
	}

	/* Get line number */
	if (!(tok = get_token(&args, script, lineno)) || process_token(&line, tok, sizeof(line), ARG_NUMBER)) {
		ast_log(LOG_WARNING, "Invalid line: '%s' at line %d of %s\n", tok ? tok : "<nothing>", lineno, script);
		return 0;
	}

	if ((tok = get_token(&args, script, lineno)) && !strcasecmp(tok, "NOUPDATE")) {
		cmd = 1;
		tok = get_token(&args, script, lineno);
	}

	if (tok && !strcasecmp(tok, "UNLESS")) {
		/* Check for trailing UNLESS flag */
		if (!(tok = get_token(&args, script, lineno)))
			ast_log(LOG_WARNING, "Missing argument for UNLESS clause at line %d of %s\n", lineno, script);
		else if (process_token(&flag, tok, sizeof(flag), ARG_NUMBER))
			ast_log(LOG_WARNING, "Invalid flag number '%s' at line %d of %s\n", tok, lineno, script);

		if ((tok = get_token(&args, script, lineno)))
			ast_log(LOG_WARNING, "Extra arguments after UNLESS clause: '%s' at line %d of %s\n", tok, lineno, script);
	}

	buf[0] = id;
	buf[1] = (cmd << 6) | (disp->id & 0x3f);
	buf[2] = ((line & 0x1f) << 3) | (flag & 0x7);

	return 3;
}

static int cleardisplay(char *buf, char *name, int id, char *args, struct adsi_script *istate, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);

	if (tok)
		ast_log(LOG_WARNING, "Clearing display requires no arguments ('%s') at line %d of %s\n", tok, lineno, script);

	buf[0] = id;
	buf[1] = 0x00;
	return 2;
}

static int digitdirect(char *buf, char *name, int id, char *args, struct adsi_script *istate, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);

	if (tok)
		ast_log(LOG_WARNING, "Digitdirect requires no arguments ('%s') at line %d of %s\n", tok, lineno, script);

	buf[0] = id;
	buf[1] = 0x7;
	return 2;
}

static int clearcbone(char *buf, char *name, int id, char *args, struct adsi_script *istate, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);

	if (tok)
		ast_log(LOG_WARNING, "CLEARCB1 requires no arguments ('%s') at line %d of %s\n", tok, lineno, script);

	buf[0] = id;
	buf[1] = 0;
	return 2;
}

static int digitcollect(char *buf, char *name, int id, char *args, struct adsi_script *istate, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);

	if (tok)
		ast_log(LOG_WARNING, "Digitcollect requires no arguments ('%s') at line %d of %s\n", tok, lineno, script);

	buf[0] = id;
	buf[1] = 0xf;
	return 2;
}

static int subscript(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);
	char subscr[80];
	struct adsi_subscript *sub;

	if (!tok) {
		ast_log(LOG_WARNING, "Missing subscript to call at line %d of %s\n", lineno, script);
		return 0;
	}

	if (process_token(subscr, tok, sizeof(subscr) - 1, ARG_STRING)) {
		ast_log(LOG_WARNING, "Invalid number of seconds '%s' at line %d of %s\n", tok, lineno, script);
		return 0;
	}

	if (!(sub = getsubbyname(state, subscr, script, lineno)))
		return 0;

	buf[0] = 0x9d;
	buf[1] = sub->id;

	return 2;
}

static int onevent(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno)
{
	char *tok = get_token(&args, script, lineno);
	char subscr[80], sname[80];
	int sawin = 0, event, snums[8], scnt = 0, x;
	struct adsi_subscript *sub;

	if (!tok) {
		ast_log(LOG_WARNING, "Missing event for 'ONEVENT' at line %d of %s\n", lineno, script);
		return 0;
	}

	if ((event = geteventbyname(tok)) < 1) {
		ast_log(LOG_WARNING, "'%s' is not a valid event name, at line %d of %s\n", args, lineno, script);
		return 0;
	}

	tok = get_token(&args, script, lineno);
	while ((!sawin && !strcasecmp(tok, "IN")) || (sawin && !strcasecmp(tok, "OR"))) {
		sawin = 1;
		if (scnt > 7) {
			ast_log(LOG_WARNING, "No more than 8 states may be specified for inclusion at line %d of %s\n", lineno, script);
			return 0;
		}
		/* Process 'in' things */
		tok = get_token(&args, script, lineno);
		if (process_token(sname, tok, sizeof(sname), ARG_STRING)) {
			ast_log(LOG_WARNING, "'%s' is not a valid state name at line %d of %s\n", tok, lineno, script);
			return 0;
		}
		if ((snums[scnt] = getstatebyname(state, sname, script, lineno, 0) == NULL)) {
			ast_log(LOG_WARNING, "State '%s' not declared at line %d of %s\n", sname, lineno, script);
			return 0;
		}
		scnt++;
		if (!(tok = get_token(&args, script, lineno)))
			break;
	}
	if (!tok || strcasecmp(tok, "GOTO")) {
		if (!tok)
			tok = "<nothing>";
		if (sawin)
			ast_log(LOG_WARNING, "Got '%s' while looking for 'GOTO' or 'OR' at line %d of %s\n", tok, lineno, script);
		else
			ast_log(LOG_WARNING, "Got '%s' while looking for 'GOTO' or 'IN' at line %d of %s\n", tok, lineno, script);
	}
	if (!(tok = get_token(&args, script, lineno))) {
		ast_log(LOG_WARNING, "Missing subscript to call at line %d of %s\n", lineno, script);
		return 0;
	}
	if (process_token(subscr, tok, sizeof(subscr) - 1, ARG_STRING)) {
		ast_log(LOG_WARNING, "Invalid subscript '%s' at line %d of %s\n", tok, lineno, script);
		return 0;
	}
	if (!(sub = getsubbyname(state, subscr, script, lineno)))
		return 0;
	buf[0] = 8;
	buf[1] = event;
	buf[2] = sub->id | 0x80;
	for (x = 0; x < scnt; x++)
		buf[3 + x] = snums[x];
	return 3 + scnt;
}

struct adsi_key_cmd {
	char *name;
	int id;
	int (*add_args)(char *buf, char *name, int id, char *args, struct adsi_script *state, const char *script, int lineno);
};

static const struct adsi_key_cmd kcmds[] = {
	{ "SENDDTMF", 0, send_dtmf },
	/* Encoded DTMF would go here */
	{ "ONHOOK", 0x81 },
	{ "OFFHOOK", 0x82 },
	{ "FLASH", 0x83 },
	{ "WAITDIALTONE", 0x84 },
	/* Send line number */
	{ "BLANK", 0x86 },
	{ "SENDCHARS", 0x87 },
	{ "CLEARCHARS", 0x88 },
	{ "BACKSPACE", 0x89 },
	/* Tab column */
	{ "GOTOLINE", 0x8b, goto_line },
	{ "GOTOLINEREL", 0x8c, goto_line_rel },
	{ "PAGEUP", 0x8d },
	{ "PAGEDOWN", 0x8e },
	/* Extended DTMF */
	{ "DELAY", 0x90, send_delay },
	{ "DIALPULSEONE", 0x91 },
	{ "DATAMODE", 0x92 },
	{ "VOICEMODE", 0x93 },
	/* Display call buffer 'n' */
	/* Clear call buffer 'n' */
	{ "CLEARCB1", 0x95, clearcbone },
	{ "DIGITCOLLECT", 0x96, digitcollect },
	{ "DIGITDIRECT", 0x96, digitdirect },
	{ "CLEAR", 0x97 },
	{ "SHOWDISPLAY", 0x98, showdisplay },
	{ "CLEARDISPLAY", 0x98, cleardisplay },
	{ "SHOWKEYS", 0x99, showkeys },
	{ "SETSTATE", 0x9a, set_state },
	{ "TIMERSTART", 0x9b, starttimer },
	{ "TIMERCLEAR", 0x9b, cleartimer },
	{ "SETFLAG", 0x9c, setflag },
	{ "CLEARFLAG", 0x9c, clearflag },
	{ "GOTO", 0x9d, subscript },
	{ "EVENT22", 0x9e },
	{ "EVENT23", 0x9f },
	{ "EXIT", 0xa0 },
};

static const struct adsi_key_cmd opcmds[] = {

	/* 1 - Branch on event -- handled specially */
	{ "SHOWKEYS", 2, showkeys },
	/* Display Control */
	{ "SHOWDISPLAY", 3, showdisplay },
	{ "CLEARDISPLAY", 3, cleardisplay },
	{ "CLEAR", 5 },
	{ "SETSTATE", 6, set_state },
	{ "TIMERSTART", 7, starttimer },
	{ "TIMERCLEAR", 7, cleartimer },
	{ "ONEVENT", 8, onevent },
	/* 9 - Subroutine label, treated specially */
	{ "SETFLAG", 10, setflag },
	{ "CLEARFLAG", 10, clearflag },
	{ "DELAY", 11, send_delay },
	{ "EXIT", 12 },
};


static int process_returncode(struct adsi_soft_key *key, char *code, char *args, struct adsi_script *state, const char *script, int lineno)
{
	int x, res;
	char *unused;

	for (x = 0; x < ARRAY_LEN(kcmds); x++) {
		if ((kcmds[x].id > -1) && !strcasecmp(kcmds[x].name, code)) {
			if (kcmds[x].add_args) {
				res = kcmds[x].add_args(key->retstr + key->retstrlen,
						code, kcmds[x].id, args, state, script, lineno);
				if ((key->retstrlen + res - key->initlen) <= MAX_RET_CODE)
					key->retstrlen += res;
				else
					ast_log(LOG_WARNING, "No space for '%s' code in key '%s' at line %d of %s\n", kcmds[x].name, key->vname, lineno, script);
			} else {
				if ((unused = get_token(&args, script, lineno)))
					ast_log(LOG_WARNING, "'%s' takes no arguments at line %d of %s (token is '%s')\n", kcmds[x].name, lineno, script, unused);
				if ((key->retstrlen + 1 - key->initlen) <= MAX_RET_CODE) {
					key->retstr[key->retstrlen] = kcmds[x].id;
					key->retstrlen++;
				} else
					ast_log(LOG_WARNING, "No space for '%s' code in key '%s' at line %d of %s\n", kcmds[x].name, key->vname, lineno, script);
			}
			return 0;
		}
	}
	return -1;
}

static int process_opcode(struct adsi_subscript *sub, char *code, char *args, struct adsi_script *state, const char *script, int lineno)
{
	int x, res, max = sub->id ? MAX_SUB_LEN : MAX_MAIN_LEN;
	char *unused;

	for (x = 0; x < ARRAY_LEN(opcmds); x++) {
		if ((opcmds[x].id > -1) && !strcasecmp(opcmds[x].name, code)) {
			if (opcmds[x].add_args) {
				res = opcmds[x].add_args(sub->data + sub->datalen,
						code, opcmds[x].id, args, state, script, lineno);
				if ((sub->datalen + res + 1) <= max)
					sub->datalen += res;
				else {
					ast_log(LOG_WARNING, "No space for '%s' code in subscript '%s' at line %d of %s\n", opcmds[x].name, sub->vname, lineno, script);
					return -1;
				}
			} else {
				if ((unused = get_token(&args, script, lineno)))
					ast_log(LOG_WARNING, "'%s' takes no arguments at line %d of %s (token is '%s')\n", opcmds[x].name, lineno, script, unused);
				if ((sub->datalen + 2) <= max) {
					sub->data[sub->datalen] = opcmds[x].id;
					sub->datalen++;
				} else {
					ast_log(LOG_WARNING, "No space for '%s' code in key '%s' at line %d of %s\n", opcmds[x].name, sub->vname, lineno, script);
					return -1;
				}
			}
			/* Separate commands with 0xff */
			sub->data[sub->datalen] = 0xff;
			sub->datalen++;
			sub->inscount++;
			return 0;
		}
	}
	return -1;
}

static int adsi_process(struct adsi_script *state, char *buf, const char *script, int lineno)
{
	char *keyword = get_token(&buf, script, lineno);
	char *args, vname[256], tmp[80], tmp2[80];
	int lrci, wi, event;
	struct adsi_display *disp;
	struct adsi_subscript *newsub;

	if (!keyword)
		return 0;

	switch(state->state) {
	case STATE_NORMAL:
		if (!strcasecmp(keyword, "DESCRIPTION")) {
			if ((args = get_token(&buf, script, lineno))) {
				if (process_token(state->desc, args, sizeof(state->desc) - 1, ARG_STRING))
					ast_log(LOG_WARNING, "'%s' is not a valid token for DESCRIPTION at line %d of %s\n", args, lineno, script);
			} else
				ast_log(LOG_WARNING, "Missing argument for DESCRIPTION at line %d of %s\n", lineno, script);
		} else if (!strcasecmp(keyword, "VERSION")) {
			if ((args = get_token(&buf, script, lineno))) {
				if (process_token(&state->ver, args, sizeof(state->ver) - 1, ARG_NUMBER))
					ast_log(LOG_WARNING, "'%s' is not a valid token for VERSION at line %d of %s\n", args, lineno, script);
			} else
				ast_log(LOG_WARNING, "Missing argument for VERSION at line %d of %s\n", lineno, script);
		} else if (!strcasecmp(keyword, "SECURITY")) {
			if ((args = get_token(&buf, script, lineno))) {
				if (process_token(state->sec, args, sizeof(state->sec) - 1, ARG_STRING | ARG_NUMBER))
					ast_log(LOG_WARNING, "'%s' is not a valid token for SECURITY at line %d of %s\n", args, lineno, script);
			} else
				ast_log(LOG_WARNING, "Missing argument for SECURITY at line %d of %s\n", lineno, script);
		} else if (!strcasecmp(keyword, "FDN")) {
			if ((args = get_token(&buf, script, lineno))) {
				if (process_token(state->fdn, args, sizeof(state->fdn) - 1, ARG_STRING | ARG_NUMBER))
					ast_log(LOG_WARNING, "'%s' is not a valid token for FDN at line %d of %s\n", args, lineno, script);
			} else
				ast_log(LOG_WARNING, "Missing argument for FDN at line %d of %s\n", lineno, script);
		} else if (!strcasecmp(keyword, "KEY")) {
			if (!(args = get_token(&buf, script, lineno))) {
				ast_log(LOG_WARNING, "KEY definition missing name at line %d of %s\n", lineno, script);
				break;
			}
			if (process_token(vname, args, sizeof(vname) - 1, ARG_STRING)) {
				ast_log(LOG_WARNING, "'%s' is not a valid token for a KEY name at line %d of %s\n", args, lineno, script);
				break;
			}
			if (!(state->key = getkeybyname(state, vname, script, lineno))) {
				ast_log(LOG_WARNING, "Out of key space at line %d of %s\n", lineno, script);
				break;
			}
			if (state->key->defined) {
				ast_log(LOG_WARNING, "Cannot redefine key '%s' at line %d of %s\n", vname, lineno, script);
				break;
			}
			if (!(args = get_token(&buf, script, lineno)) || strcasecmp(args, "IS")) {
				ast_log(LOG_WARNING, "Expecting 'IS', but got '%s' at line %d of %s\n", args ? args : "<nothing>", lineno, script);
				break;
			}
			if (!(args = get_token(&buf, script, lineno))) {
				ast_log(LOG_WARNING, "KEY definition missing short name at line %d of %s\n", lineno, script);
				break;
			}
			if (process_token(tmp, args, sizeof(tmp) - 1, ARG_STRING)) {
				ast_log(LOG_WARNING, "'%s' is not a valid token for a KEY short name at line %d of %s\n", args, lineno, script);
				break;
			}
			if ((args = get_token(&buf, script, lineno))) {
				if (strcasecmp(args, "OR")) {
					ast_log(LOG_WARNING, "Expecting 'OR' but got '%s' instead at line %d of %s\n", args, lineno, script);
					break;
				}
				if (!(args = get_token(&buf, script, lineno))) {
					ast_log(LOG_WARNING, "KEY definition missing optional long name at line %d of %s\n", lineno, script);
					break;
				}
				if (process_token(tmp2, args, sizeof(tmp2) - 1, ARG_STRING)) {
					ast_log(LOG_WARNING, "'%s' is not a valid token for a KEY long name at line %d of %s\n", args, lineno, script);
					break;
				}
			} else {
				ast_copy_string(tmp2, tmp, sizeof(tmp2));
			}
			if (strlen(tmp2) > 18) {
				ast_log(LOG_WARNING, "Truncating full name to 18 characters at line %d of %s\n", lineno, script);
				tmp2[18] = '\0';
			}
			if (strlen(tmp) > 7) {
				ast_log(LOG_WARNING, "Truncating short name to 7 bytes at line %d of %s\n", lineno, script);
				tmp[7] = '\0';
			}
			/* Setup initial stuff */
			state->key->retstr[0] = 0x80;
			/* 1 has the length */
			state->key->retstr[2] = state->key->id;
			/* Put the Full name in */
			memcpy(state->key->retstr + 3, tmp2, strlen(tmp2));
			/* Update length */
			state->key->retstrlen = strlen(tmp2) + 3;
			/* Put trailing 0xff */
			state->key->retstr[state->key->retstrlen++] = 0xff;
			/* Put the short name */
			memcpy(state->key->retstr + state->key->retstrlen, tmp, strlen(tmp));
			/* Update length */
			state->key->retstrlen += strlen(tmp);
			/* Put trailing 0xff */
			state->key->retstr[state->key->retstrlen++] = 0xff;
			/* Record initial length */
			state->key->initlen = state->key->retstrlen;
			state->state = STATE_INKEY;
		} else if (!strcasecmp(keyword, "SUB")) {
			if (!(args = get_token(&buf, script, lineno))) {
				ast_log(LOG_WARNING, "SUB definition missing name at line %d of %s\n", lineno, script);
				break;
			}
			if (process_token(vname, args, sizeof(vname) - 1, ARG_STRING)) {
				ast_log(LOG_WARNING, "'%s' is not a valid token for a KEY name at line %d of %s\n", args, lineno, script);
				break;
			}
			if (!(state->sub = getsubbyname(state, vname, script, lineno))) {
				ast_log(LOG_WARNING, "Out of subroutine space at line %d of %s\n", lineno, script);
				break;
			}
			if (state->sub->defined) {
				ast_log(LOG_WARNING, "Cannot redefine subroutine '%s' at line %d of %s\n", vname, lineno, script);
				break;
			}
			/* Setup sub */
			state->sub->data[0] = 0x82;
			/* 1 is the length */
			state->sub->data[2] = 0x0; /* Clear extensibility bit */
			state->sub->datalen = 3;
			if (state->sub->id) {
				/* If this isn't the main subroutine, make a subroutine label for it */
				state->sub->data[3] = 9;
				state->sub->data[4] = state->sub->id;
				/* 5 is length */
				state->sub->data[6] = 0xff;
				state->sub->datalen = 7;
			}
			if (!(args = get_token(&buf, script, lineno)) || strcasecmp(args, "IS")) {
				ast_log(LOG_WARNING, "Expecting 'IS', but got '%s' at line %d of %s\n", args ? args : "<nothing>", lineno, script);
				break;
			}
			state->state = STATE_INSUB;
		} else if (!strcasecmp(keyword, "STATE")) {
			if (!(args = get_token(&buf, script, lineno))) {
				ast_log(LOG_WARNING, "STATE definition missing name at line %d of %s\n", lineno, script);
				break;
			}
			if (process_token(vname, args, sizeof(vname) - 1, ARG_STRING)) {
				ast_log(LOG_WARNING, "'%s' is not a valid token for a STATE name at line %d of %s\n", args, lineno, script);
				break;
			}
			if (getstatebyname(state, vname, script, lineno, 0)) {
				ast_log(LOG_WARNING, "State '%s' is already defined at line %d of %s\n", vname, lineno, script);
				break;
			}
			getstatebyname(state, vname, script, lineno, 1);
		} else if (!strcasecmp(keyword, "FLAG")) {
			if (!(args = get_token(&buf, script, lineno))) {
				ast_log(LOG_WARNING, "FLAG definition missing name at line %d of %s\n", lineno, script);
				break;
			}
			if (process_token(vname, args, sizeof(vname) - 1, ARG_STRING)) {
				ast_log(LOG_WARNING, "'%s' is not a valid token for a FLAG name at line %d of %s\n", args, lineno, script);
				break;
			}
			if (getflagbyname(state, vname, script, lineno, 0)) {
				ast_log(LOG_WARNING, "Flag '%s' is already defined\n", vname);
				break;
			}
			getflagbyname(state, vname, script, lineno, 1);
		} else if (!strcasecmp(keyword, "DISPLAY")) {
			lrci = 0;
			wi = 0;
			if (!(args = get_token(&buf, script, lineno))) {
				ast_log(LOG_WARNING, "SUB definition missing name at line %d of %s\n", lineno, script);
				break;
			}
			if (process_token(vname, args, sizeof(vname) - 1, ARG_STRING)) {
				ast_log(LOG_WARNING, "'%s' is not a valid token for a KEY name at line %d of %s\n", args, lineno, script);
				break;
			}
			if (getdisplaybyname(state, vname, script, lineno, 0)) {
				ast_log(LOG_WARNING, "State '%s' is already defined\n", vname);
				break;
			}
			if (!(disp = getdisplaybyname(state, vname, script, lineno, 1)))
				break;
			if (!(args = get_token(&buf, script, lineno)) || strcasecmp(args, "IS")) {
				ast_log(LOG_WARNING, "Missing 'IS' at line %d of %s\n", lineno, script);
				break;
			}
			if (!(args = get_token(&buf, script, lineno))) {
				ast_log(LOG_WARNING, "Missing Column 1 text at line %d of %s\n", lineno, script);
				break;
			}
			if (process_token(tmp, args, sizeof(tmp) - 1, ARG_STRING)) {
				ast_log(LOG_WARNING, "Token '%s' is not valid column 1 text at line %d of %s\n", args, lineno, script);
				break;
			}
			if (strlen(tmp) > 20) {
				ast_log(LOG_WARNING, "Truncating column one to 20 characters at line %d of %s\n", lineno, script);
				tmp[20] = '\0';
			}
			memcpy(disp->data + 5, tmp, strlen(tmp));
			disp->datalen = strlen(tmp) + 5;
			disp->data[disp->datalen++] = 0xff;

			args = get_token(&buf, script, lineno);
			if (args && !process_token(tmp, args, sizeof(tmp) - 1, ARG_STRING)) {
				/* Got a column two */
				if (strlen(tmp) > 20) {
					ast_log(LOG_WARNING, "Truncating column two to 20 characters at line %d of %s\n", lineno, script);
					tmp[20] = '\0';
				}
				memcpy(disp->data + disp->datalen, tmp, strlen(tmp));
				disp->datalen += strlen(tmp);
				args = get_token(&buf, script, lineno);
			}
			while (args) {
				if (!strcasecmp(args, "JUSTIFY")) {
					args = get_token(&buf, script, lineno);
					if (!args) {
						ast_log(LOG_WARNING, "Qualifier 'JUSTIFY' requires an argument at line %d of %s\n", lineno, script);
						break;
					}
					lrci = getjustifybyname(args);
					if (lrci < 0) {
						ast_log(LOG_WARNING, "'%s' is not a valid justification at line %d of %s\n", args, lineno, script);
						break;
					}
				} else if (!strcasecmp(args, "WRAP")) {
					wi = 0x80;
				} else {
					ast_log(LOG_WARNING, "'%s' is not a known qualifier at line %d of %s\n", args, lineno, script);
					break;
				}
				args = get_token(&buf, script, lineno);
			}
			if (args) {
				/* Something bad happened */
				break;
			}
			disp->data[0] = 0x81;
			disp->data[1] = disp->datalen - 2;
			disp->data[2] = ((lrci & 0x3) << 6) | disp->id;
			disp->data[3] = wi;
			disp->data[4] = 0xff;
		} else {
			ast_log(LOG_WARNING, "Invalid or Unknown keyword '%s' in PROGRAM\n", keyword);
		}
		break;
	case STATE_INKEY:
		if (process_returncode(state->key, keyword, buf, state, script, lineno)) {
			if (!strcasecmp(keyword, "ENDKEY")) {
				/* Return to normal operation and increment current key */
				state->state = STATE_NORMAL;
				state->key->defined = 1;
				state->key->retstr[1] = state->key->retstrlen - 2;
				state->key = NULL;
			} else {
				ast_log(LOG_WARNING, "Invalid or Unknown keyword '%s' in SOFTKEY definition at line %d of %s\n", keyword, lineno, script);
			}
		}
		break;
	case STATE_INIF:
		if (process_opcode(state->sub, keyword, buf, state, script, lineno)) {
			if (!strcasecmp(keyword, "ENDIF")) {
				/* Return to normal SUB operation and increment current key */
				state->state = STATE_INSUB;
				state->sub->defined = 1;
				/* Store the proper number of instructions */
				state->sub->ifdata[2] = state->sub->ifinscount;
			} else if (!strcasecmp(keyword, "GOTO")) {
				if (!(args = get_token(&buf, script, lineno))) {
					ast_log(LOG_WARNING, "GOTO clause missing Subscript name at line %d of %s\n", lineno, script);
					break;
				}
				if (process_token(tmp, args, sizeof(tmp) - 1, ARG_STRING)) {
					ast_log(LOG_WARNING, "'%s' is not a valid subscript name token at line %d of %s\n", args, lineno, script);
					break;
				}
				if (!(newsub = getsubbyname(state, tmp, script, lineno)))
					break;
				/* Somehow you use GOTO to go to another place */
				state->sub->data[state->sub->datalen++] = 0x8;
				state->sub->data[state->sub->datalen++] = state->sub->ifdata[1];
				state->sub->data[state->sub->datalen++] = newsub->id;
				/* Terminate */
				state->sub->data[state->sub->datalen++] = 0xff;
				/* Increment counters */
				state->sub->inscount++;
				state->sub->ifinscount++;
			} else {
				ast_log(LOG_WARNING, "Invalid or Unknown keyword '%s' in IF clause at line %d of %s\n", keyword, lineno, script);
			}
		} else
			state->sub->ifinscount++;
		break;
	case STATE_INSUB:
		if (process_opcode(state->sub, keyword, buf, state, script, lineno)) {
			if (!strcasecmp(keyword, "ENDSUB")) {
				/* Return to normal operation and increment current key */
				state->state = STATE_NORMAL;
				state->sub->defined = 1;
				/* Store the proper length */
				state->sub->data[1] = state->sub->datalen - 2;
				if (state->sub->id) {
					/* if this isn't main, store number of instructions, too */
					state->sub->data[5] = state->sub->inscount;
				}
				state->sub = NULL;
			} else if (!strcasecmp(keyword, "IFEVENT")) {
				if (!(args = get_token(&buf, script, lineno))) {
					ast_log(LOG_WARNING, "IFEVENT clause missing Event name at line %d of %s\n", lineno, script);
					break;
				}
				if ((event = geteventbyname(args)) < 1) {
					ast_log(LOG_WARNING, "'%s' is not a valid event\n", args);
					break;
				}
				if (!(args = get_token(&buf, script, lineno)) || strcasecmp(args, "THEN")) {
					ast_log(LOG_WARNING, "IFEVENT clause missing 'THEN' at line %d of %s\n", lineno, script);
					break;
				}
				state->sub->ifinscount = 0;
				state->sub->ifdata = state->sub->data + state->sub->datalen;
				/* Reserve header and insert op codes */
				state->sub->ifdata[0] = 0x1;
				state->sub->ifdata[1] = event;
				/* 2 is for the number of instructions */
				state->sub->ifdata[3] = 0xff;
				state->sub->datalen += 4;
				/* Update Subscript instruction count */
				state->sub->inscount++;
				state->state = STATE_INIF;
			} else {
				ast_log(LOG_WARNING, "Invalid or Unknown keyword '%s' in SUB definition at line %d of %s\n", keyword, lineno, script);
			}
		}
		break;
	default:
		ast_log(LOG_WARNING, "Can't process keyword '%s' in weird state %d\n", keyword, state->state);
	}
	return 0;
}

static struct adsi_script *compile_script(const char *script)
{
	FILE *f;
	char fn[256], buf[256], *c;
	int lineno = 0, x, err;
	struct adsi_script *scr;

	if (script[0] == '/')
		ast_copy_string(fn, script, sizeof(fn));
	else
		snprintf(fn, sizeof(fn), "%s/%s", ast_config_AST_CONFIG_DIR, script);

	if (!(f = fopen(fn, "r"))) {
		ast_log(LOG_WARNING, "Can't open file '%s'\n", fn);
		return NULL;
	}

	if (!(scr = ast_calloc(1, sizeof(*scr)))) {
		fclose(f);
		return NULL;
	}

	/* Create "main" as first subroutine */
	getsubbyname(scr, "main", NULL, 0);
	while (!feof(f)) {
		if (!fgets(buf, sizeof(buf), f)) {
			continue;
		}
		if (!feof(f)) {
			lineno++;
			/* Trim off trailing return */
			buf[strlen(buf) - 1] = '\0';
			/* Strip comments */
			if ((c = strchr(buf, ';')))
				*c = '\0';
			if (!ast_strlen_zero(buf))
				adsi_process(scr, buf, script, lineno);
		}
	}
	fclose(f);
	/* Make sure we're in the main routine again */
	switch(scr->state) {
	case STATE_NORMAL:
		break;
	case STATE_INSUB:
		ast_log(LOG_WARNING, "Missing ENDSUB at end of file %s\n", script);
		ast_free(scr);
		return NULL;
	case STATE_INKEY:
		ast_log(LOG_WARNING, "Missing ENDKEY at end of file %s\n", script);
		ast_free(scr);
		return NULL;
	}
	err = 0;

	/* Resolve all keys and record their lengths */
	for (x = 0; x < scr->numkeys; x++) {
		if (!scr->keys[x].defined) {
			ast_log(LOG_WARNING, "Key '%s' referenced but never defined in file %s\n", scr->keys[x].vname, fn);
			err++;
		}
	}

	/* Resolve all subs */
	for (x = 0; x < scr->numsubs; x++) {
		if (!scr->subs[x].defined) {
			ast_log(LOG_WARNING, "Subscript '%s' referenced but never defined in file %s\n", scr->subs[x].vname, fn);
			err++;
		}
		if (x == (scr->numsubs - 1)) {
			/* Clear out extension bit on last message */
			scr->subs[x].data[2] = 0x80;
		}
	}

	if (err) {
		ast_free(scr);
		return NULL;
	}
	return scr;
}

#ifdef DUMP_MESSAGES
static void dump_message(char *type, char *vname, unsigned char *buf, int buflen)
{
	int x;
	printf("%s %s: [ ", type, vname);
	for (x = 0; x < buflen; x++)
		printf("%02hhx ", buf[x]);
	printf("]\n");
}
#endif

static int adsi_prog(struct ast_channel *chan, const char *script)
{
	struct adsi_script *scr;
	int x, bytes;
	unsigned char buf[1024];

	if (!(scr = compile_script(script)))
		return -1;

	/* Start an empty ADSI Session */
	if (ast_adsi_load_session(chan, NULL, 0, 1) < 1)
		return -1;

	/* Now begin the download attempt */
	if (ast_adsi_begin_download(chan, scr->desc, scr->fdn, scr->sec, scr->ver)) {
		/* User rejected us for some reason */
		ast_verb(3, "User rejected download attempt\n");
		ast_log(LOG_NOTICE, "User rejected download on channel %s\n", ast_channel_name(chan));
		ast_free(scr);
		return -1;
	}

	bytes = 0;
	/* Start with key definitions */
	for (x = 0; x < scr->numkeys; x++) {
		if (bytes + scr->keys[x].retstrlen > 253) {
			/* Send what we've collected so far */
			if (ast_adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD)) {
				ast_log(LOG_WARNING, "Unable to send chunk ending at %d\n", x);
				return -1;
			}
			bytes =0;
		}
		memcpy(buf + bytes, scr->keys[x].retstr, scr->keys[x].retstrlen);
		bytes += scr->keys[x].retstrlen;
#ifdef DUMP_MESSAGES
		dump_message("Key", scr->keys[x].vname, scr->keys[x].retstr, scr->keys[x].retstrlen);
#endif
	}
	if (bytes) {
		if (ast_adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD)) {
			ast_log(LOG_WARNING, "Unable to send chunk ending at %d\n", x);
			return -1;
		}
	}

	bytes = 0;
	/* Continue with the display messages */
	for (x = 0; x < scr->numdisplays; x++) {
		if (bytes + scr->displays[x].datalen > 253) {
			/* Send what we've collected so far */
			if (ast_adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD)) {
				ast_log(LOG_WARNING, "Unable to send chunk ending at %d\n", x);
				return -1;
			}
			bytes =0;
		}
		memcpy(buf + bytes, scr->displays[x].data, scr->displays[x].datalen);
		bytes += scr->displays[x].datalen;
#ifdef DUMP_MESSAGES
		dump_message("Display", scr->displays[x].vname, scr->displays[x].data, scr->displays[x].datalen);
#endif
	}
	if (bytes) {
		if (ast_adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD)) {
			ast_log(LOG_WARNING, "Unable to send chunk ending at %d\n", x);
			return -1;
		}
	}

	bytes = 0;
	/* Send subroutines */
	for (x = 0; x < scr->numsubs; x++) {
		if (bytes + scr->subs[x].datalen > 253) {
			/* Send what we've collected so far */
			if (ast_adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD)) {
				ast_log(LOG_WARNING, "Unable to send chunk ending at %d\n", x);
				return -1;
			}
			bytes =0;
		}
		memcpy(buf + bytes, scr->subs[x].data, scr->subs[x].datalen);
		bytes += scr->subs[x].datalen;
#ifdef DUMP_MESSAGES
		dump_message("Sub", scr->subs[x].vname, scr->subs[x].data, scr->subs[x].datalen);
#endif
	}
	if (bytes) {
		if (ast_adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD)) {
			ast_log(LOG_WARNING, "Unable to send chunk ending at %d\n", x);
			return -1;
		}
	}

	bytes = 0;
	bytes += ast_adsi_display(buf, ADSI_INFO_PAGE, 1, ADSI_JUST_LEFT, 0, "Download complete.", "");
	bytes += ast_adsi_set_line(buf, ADSI_INFO_PAGE, 1);
	if (ast_adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY) < 0)
		return -1;
	if (ast_adsi_end_download(chan)) {
		/* Download failed for some reason */
		ast_verb(3, "Download attempt failed\n");
		ast_log(LOG_NOTICE, "Download failed on %s\n", ast_channel_name(chan));
		ast_free(scr);
		return -1;
	}
	ast_free(scr);
	ast_adsi_unload_session(chan);
	return 0;
}

static int adsi_exec(struct ast_channel *chan, const char *data)
{
	int res = 0;

	if (ast_strlen_zero(data))
		data = "asterisk.adsi";

	if (!ast_adsi_available(chan)) {
		ast_verb(3, "ADSI Unavailable on CPE.  Not bothering to try.\n");
	} else {
		ast_verb(3, "ADSI Available on CPE.  Attempting Upload.\n");
		res = adsi_prog(chan, data);
	}

	return res;
}

static int unload_module(void)
{
	return ast_unregister_application(app);
}

/*!
 * \brief Load the module
 *
 * Module loading including tests for configuration or dependencies.
 * This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE,
 * or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails
 * tests return AST_MODULE_LOAD_FAILURE. If the module can not load the
 * configuration file or other non-critical problem return
 * AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.
 */
static int load_module(void)
{
	if (ast_register_application_xml(app, adsi_exec))
		return AST_MODULE_LOAD_DECLINE;
	return AST_MODULE_LOAD_SUCCESS;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Asterisk ADSI Programming Application",
		.support_level = AST_MODULE_SUPPORT_EXTENDED,
		.load = load_module,
		.unload = unload_module,
		);