app_adsiprog.c

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/*
 * 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 The application app_adsiprog 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: 374164 $")

#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", (int *)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 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] = 128;
         /* 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] = 130;
         /* 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] = 129;
         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("%02x ", 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_FAILURE;
   return AST_MODULE_LOAD_SUCCESS;
}

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