app_followme.c

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/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * A full-featured Find-Me/Follow-Me Application
 * 
 * Copyright (C) 2005-2006, BJ Weschke All Rights Reserved.
 *
 * BJ Weschke <bweschke@btwtech.com>
 *
 * This code is released by the author with no restrictions on usage.
 *
 * 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.
 *
 */

/*! \file
 *
 * \brief Find-Me Follow-Me application
 *
 * \author BJ Weschke <bweschke@btwtech.com>
 *
 * \arg See \ref Config_followme
 *
 * \ingroup applications
 */

/*** MODULEINFO
   <depend>chan_local</depend>
   <support_level>core</support_level>
 ***/

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision: 348362 $")

#include <signal.h>

#include "asterisk/paths.h"   /* use ast_config_AST_SPOOL_DIR */
#include "asterisk/lock.h"
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/translate.h"
#include "asterisk/say.h"
#include "asterisk/features.h"
#include "asterisk/musiconhold.h"
#include "asterisk/cli.h"
#include "asterisk/manager.h"
#include "asterisk/config.h"
#include "asterisk/utils.h"
#include "asterisk/causes.h"
#include "asterisk/astdb.h"
#include "asterisk/dsp.h"
#include "asterisk/app.h"

/*** DOCUMENTATION
   <application name="FollowMe" language="en_US">
      <synopsis>
         Find-Me/Follow-Me application.
      </synopsis>
      <syntax>
         <parameter name="followmeid" required="true" />
         <parameter name="options">
            <optionlist>
               <option name="s">
                  <para>Playback the incoming status message prior to starting
                  the follow-me step(s)</para>
               </option>
               <option name="a">
                  <para>Record the caller's name so it can be announced to the
                  callee on each step.</para>
               </option>
               <option name="n">
                  <para>Playback the unreachable status message if we've run out
                  of steps to reach the or the callee has elected not to be reachable.</para>
               </option>
               <option name="d">
                  <para>Disable the 'Please hold while we try to connect your call' announcement.</para>
               </option>
            </optionlist>
         </parameter>
      </syntax>
      <description>
         <para>This application performs Find-Me/Follow-Me functionality for the caller
         as defined in the profile matching the <replaceable>followmeid</replaceable> parameter in
         <filename>followme.conf</filename>. If the specified <replaceable>followmeid</replaceable>
         profile doesn't exist in <filename>followme.conf</filename>, execution will be returned
         to the dialplan and call execution will continue at the next priority.</para>
         <para>Returns -1 on hangup.</para>
      </description>
   </application>
 ***/

static char *app = "FollowMe";

/*! \brief Number structure */
struct number {
   char number[512]; /*!< Phone Number(s) and/or Extension(s) */
   long timeout;     /*!< Dial Timeout, if used. */
   int order;     /*!< The order to dial in */
   AST_LIST_ENTRY(number) entry; /*!< Next Number record */
};

/*! \brief Data structure for followme scripts */
struct call_followme {
   ast_mutex_t lock;
   char name[AST_MAX_EXTENSION]; /*!< Name - FollowMeID */
   char moh[AST_MAX_CONTEXT]; /*!< Music On Hold Class to be used */
   char context[AST_MAX_CONTEXT];  /*!< Context to dial from */
   unsigned int active;    /*!< Profile is active (1), or disabled (0). */
   int realtime;           /*!< Cached from realtime */
   char takecall[20];      /*!< Digit mapping to take a call */
   char nextindp[20];      /*!< Digit mapping to decline a call */
   char callfromprompt[PATH_MAX];   /*!< Sound prompt name and path */
   char norecordingprompt[PATH_MAX];   /*!< Sound prompt name and path */
   char optionsprompt[PATH_MAX]; /*!< Sound prompt name and path */
   char plsholdprompt[PATH_MAX]; /*!< Sound prompt name and path */
   char statusprompt[PATH_MAX];  /*!< Sound prompt name and path */
   char sorryprompt[PATH_MAX];   /*!< Sound prompt name and path */

   AST_LIST_HEAD_NOLOCK(numbers, number) numbers;     /*!< Head of the list of follow-me numbers */
   AST_LIST_HEAD_NOLOCK(blnumbers, number) blnumbers; /*!< Head of the list of black-listed numbers */
   AST_LIST_HEAD_NOLOCK(wlnumbers, number) wlnumbers; /*!< Head of the list of white-listed numbers */
   AST_LIST_ENTRY(call_followme) entry;           /*!< Next Follow-Me record */
};

struct fm_args {
   struct ast_channel *chan;
   char *mohclass;
   AST_LIST_HEAD_NOLOCK(cnumbers, number) cnumbers;
   int status;
   char context[AST_MAX_CONTEXT];
   char namerecloc[AST_MAX_CONTEXT];
   struct ast_channel *outbound;
   char takecall[20];      /*!< Digit mapping to take a call */
   char nextindp[20];      /*!< Digit mapping to decline a call */
   char callfromprompt[PATH_MAX];   /*!< Sound prompt name and path */
   char norecordingprompt[PATH_MAX];   /*!< Sound prompt name and path */
   char optionsprompt[PATH_MAX]; /*!< Sound prompt name and path */
   char plsholdprompt[PATH_MAX]; /*!< Sound prompt name and path */
   char statusprompt[PATH_MAX];  /*!< Sound prompt name and path */
   char sorryprompt[PATH_MAX];   /*!< Sound prompt name and path */
   struct ast_flags followmeflags;
};

struct findme_user {
   struct ast_channel *ochan;
   int state;
   char dialarg[256];
   char yn[10];
   int ynidx; 
   long digts;
   int cleared;
   AST_LIST_ENTRY(findme_user) entry;
};

enum {
   FOLLOWMEFLAG_STATUSMSG = (1 << 0),
   FOLLOWMEFLAG_RECORDNAME = (1 << 1),
   FOLLOWMEFLAG_UNREACHABLEMSG = (1 << 2),
   FOLLOWMEFLAG_DISABLEHOLDPROMPT = (1 << 3)
};

AST_APP_OPTIONS(followme_opts, {
   AST_APP_OPTION('s', FOLLOWMEFLAG_STATUSMSG ),
   AST_APP_OPTION('a', FOLLOWMEFLAG_RECORDNAME ),
   AST_APP_OPTION('n', FOLLOWMEFLAG_UNREACHABLEMSG ),
   AST_APP_OPTION('d', FOLLOWMEFLAG_DISABLEHOLDPROMPT ),
});

static int ynlongest = 0;

static const char *featuredigittostr;
static int featuredigittimeout = 5000;    /*!< Feature Digit Timeout */
static const char *defaultmoh = "default";      /*!< Default Music-On-Hold Class */

static char takecall[20] = "1", nextindp[20] = "2";
static char callfromprompt[PATH_MAX] = "followme/call-from";
static char norecordingprompt[PATH_MAX] = "followme/no-recording";
static char optionsprompt[PATH_MAX] = "followme/options";
static char plsholdprompt[PATH_MAX] = "followme/pls-hold-while-try";
static char statusprompt[PATH_MAX] = "followme/status";
static char sorryprompt[PATH_MAX] = "followme/sorry";


static AST_RWLIST_HEAD_STATIC(followmes, call_followme);
AST_LIST_HEAD_NOLOCK(findme_user_listptr, findme_user);

static void free_numbers(struct call_followme *f)
{
   /* Free numbers attached to the profile */
   struct number *prev;

   while ((prev = AST_LIST_REMOVE_HEAD(&f->numbers, entry)))
      /* Free the number */
      ast_free(prev);
   AST_LIST_HEAD_INIT_NOLOCK(&f->numbers);

   while ((prev = AST_LIST_REMOVE_HEAD(&f->blnumbers, entry)))
      /* Free the blacklisted number */
      ast_free(prev);
   AST_LIST_HEAD_INIT_NOLOCK(&f->blnumbers);

   while ((prev = AST_LIST_REMOVE_HEAD(&f->wlnumbers, entry)))
      /* Free the whitelisted number */
      ast_free(prev);
   AST_LIST_HEAD_INIT_NOLOCK(&f->wlnumbers);
}


/*! \brief Allocate and initialize followme profile */
static struct call_followme *alloc_profile(const char *fmname)
{
   struct call_followme *f;

   if (!(f = ast_calloc(1, sizeof(*f))))
      return NULL;

   ast_mutex_init(&f->lock);
   ast_copy_string(f->name, fmname, sizeof(f->name));
   f->moh[0] = '\0';
   f->context[0] = '\0';
   ast_copy_string(f->takecall, takecall, sizeof(f->takecall));
   ast_copy_string(f->nextindp, nextindp, sizeof(f->nextindp));
   ast_copy_string(f->callfromprompt, callfromprompt, sizeof(f->callfromprompt));
   ast_copy_string(f->norecordingprompt, norecordingprompt, sizeof(f->norecordingprompt));
   ast_copy_string(f->optionsprompt, optionsprompt, sizeof(f->optionsprompt));
   ast_copy_string(f->plsholdprompt, plsholdprompt, sizeof(f->plsholdprompt));
   ast_copy_string(f->statusprompt, statusprompt, sizeof(f->statusprompt));
   ast_copy_string(f->sorryprompt, sorryprompt, sizeof(f->sorryprompt));
   AST_LIST_HEAD_INIT_NOLOCK(&f->numbers);
   AST_LIST_HEAD_INIT_NOLOCK(&f->blnumbers);
   AST_LIST_HEAD_INIT_NOLOCK(&f->wlnumbers);
   return f;
}

static void init_profile(struct call_followme *f)
{
   f->active = 1;
   ast_copy_string(f->moh, defaultmoh, sizeof(f->moh));
}

   
   
/*! \brief Set parameter in profile from configuration file */
static void profile_set_param(struct call_followme *f, const char *param, const char *val, int linenum, int failunknown)
{

   if (!strcasecmp(param, "musicclass") || !strcasecmp(param, "musiconhold") || !strcasecmp(param, "music")) 
      ast_copy_string(f->moh, val, sizeof(f->moh));
   else if (!strcasecmp(param, "context")) 
      ast_copy_string(f->context, val, sizeof(f->context));
   else if (!strcasecmp(param, "takecall"))
      ast_copy_string(f->takecall, val, sizeof(f->takecall));
   else if (!strcasecmp(param, "declinecall"))
      ast_copy_string(f->nextindp, val, sizeof(f->nextindp));
   else if (!strcasecmp(param, "call-from-prompt") || !strcasecmp(param, "call_from_prompt"))
      ast_copy_string(f->callfromprompt, val, sizeof(f->callfromprompt));
   else if (!strcasecmp(param, "followme-norecording-prompt") || !strcasecmp(param, "norecording_prompt")) 
      ast_copy_string(f->norecordingprompt, val, sizeof(f->norecordingprompt));
   else if (!strcasecmp(param, "followme-options-prompt") || !strcasecmp(param, "options_prompt")) 
      ast_copy_string(f->optionsprompt, val, sizeof(f->optionsprompt));
   else if (!strcasecmp(param, "followme-pls-hold-prompt") || !strcasecmp(param, "pls_hold_prompt"))
      ast_copy_string(f->plsholdprompt, val, sizeof(f->plsholdprompt));
   else if (!strcasecmp(param, "followme-status-prompt") || !strcasecmp(param, "status_prompt")) 
      ast_copy_string(f->statusprompt, val, sizeof(f->statusprompt));
   else if (!strcasecmp(param, "followme-sorry-prompt") || !strcasecmp(param, "sorry_prompt")) 
      ast_copy_string(f->sorryprompt, val, sizeof(f->sorryprompt));
   else if (failunknown) {
      if (linenum >= 0)
         ast_log(LOG_WARNING, "Unknown keyword in profile '%s': %s at line %d of followme.conf\n", f->name, param, linenum);
      else
         ast_log(LOG_WARNING, "Unknown keyword in profile '%s': %s\n", f->name, param);
   }
}

/*! \brief Add a new number */
static struct number *create_followme_number(const char *number, int timeout, int numorder)
{
   struct number *cur;
   char *buf = ast_strdupa(number);
   char *tmp;

   if (!(cur = ast_calloc(1, sizeof(*cur))))
      return NULL;

   cur->timeout = timeout;
   if ((tmp = strchr(buf, ',')))
      *tmp = '\0';
   ast_copy_string(cur->number, buf, sizeof(cur->number));
   cur->order = numorder;
   ast_debug(1, "Created a number, %s, order of , %d, with a timeout of %ld.\n", cur->number, cur->order, cur->timeout);

   return cur;
}

/*! \brief Reload followme application module */
static int reload_followme(int reload)
{
   struct call_followme *f;
   struct ast_config *cfg;
   char *cat = NULL, *tmp;
   struct ast_variable *var;
   struct number *cur, *nm;
   char numberstr[90];
   int timeout;
   int numorder;
   const char *takecallstr;
   const char *declinecallstr;
   const char *tmpstr;
   struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };

   if (!(cfg = ast_config_load("followme.conf", config_flags))) {
      ast_log(LOG_WARNING, "No follow me config file (followme.conf), so no follow me\n");
      return 0;
   } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
      return 0;
   } else if (cfg == CONFIG_STATUS_FILEINVALID) {
      ast_log(LOG_ERROR, "Config file followme.conf is in an invalid format.  Aborting.\n");
      return 0;
   }

   AST_RWLIST_WRLOCK(&followmes);

   /* Reset Global Var Values */
   featuredigittimeout = 5000;

   /* Mark all profiles as inactive for the moment */
   AST_RWLIST_TRAVERSE(&followmes, f, entry) {
      f->active = 0;
   }

   featuredigittostr = ast_variable_retrieve(cfg, "general", "featuredigittimeout");

   if (!ast_strlen_zero(featuredigittostr)) {
      if (!sscanf(featuredigittostr, "%30d", &featuredigittimeout))
         featuredigittimeout = 5000;
   }

   if ((takecallstr = ast_variable_retrieve(cfg, "general", "takecall")) && !ast_strlen_zero(takecallstr)) {
      ast_copy_string(takecall, takecallstr, sizeof(takecall));
   }

   if ((declinecallstr = ast_variable_retrieve(cfg, "general", "declinecall")) && !ast_strlen_zero(declinecallstr)) {
      ast_copy_string(nextindp, declinecallstr, sizeof(nextindp));
   }

   if ((tmpstr = ast_variable_retrieve(cfg, "general", "call-from-prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(callfromprompt, tmpstr, sizeof(callfromprompt));
   } else if ((tmpstr = ast_variable_retrieve(cfg, "general", "call_from_prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(callfromprompt, tmpstr, sizeof(callfromprompt));
   }

   if ((tmpstr = ast_variable_retrieve(cfg, "general", "norecording-prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(norecordingprompt, tmpstr, sizeof(norecordingprompt));
   } else if ((tmpstr = ast_variable_retrieve(cfg, "general", "norecording_prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(norecordingprompt, tmpstr, sizeof(norecordingprompt));
   }


   if ((tmpstr = ast_variable_retrieve(cfg, "general", "options-prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(optionsprompt, tmpstr, sizeof(optionsprompt));
   } else if ((tmpstr = ast_variable_retrieve(cfg, "general", "options_prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(optionsprompt, tmpstr, sizeof(optionsprompt));
   }

   if ((tmpstr = ast_variable_retrieve(cfg, "general", "pls-hold-prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(plsholdprompt, tmpstr, sizeof(plsholdprompt));
   } else if ((tmpstr = ast_variable_retrieve(cfg, "general", "pls_hold_prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(plsholdprompt, tmpstr, sizeof(plsholdprompt));
   }

   if ((tmpstr = ast_variable_retrieve(cfg, "general", "status-prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(statusprompt, tmpstr, sizeof(statusprompt));
   } else if ((tmpstr = ast_variable_retrieve(cfg, "general", "status_prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(statusprompt, tmpstr, sizeof(statusprompt));
   }

   if ((tmpstr = ast_variable_retrieve(cfg, "general", "sorry-prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(sorryprompt, tmpstr, sizeof(sorryprompt));
   } else if ((tmpstr = ast_variable_retrieve(cfg, "general", "sorry_prompt")) && !ast_strlen_zero(tmpstr)) {
      ast_copy_string(sorryprompt, tmpstr, sizeof(sorryprompt));
   }

   /* Chug through config file */
   while ((cat = ast_category_browse(cfg, cat))) {
      int new = 0;

      if (!strcasecmp(cat, "general"))
         continue;

      /* Look for an existing one */
      AST_LIST_TRAVERSE(&followmes, f, entry) {
         if (!strcasecmp(f->name, cat))
            break;
      }

      ast_debug(1, "New profile %s.\n", cat);

      if (!f) {
         /* Make one then */
         f = alloc_profile(cat);
         new = 1;
      }

      /* Totally fail if we fail to find/create an entry */
      if (!f)
         continue;

      if (!new)
         ast_mutex_lock(&f->lock);
      /* Re-initialize the profile */
      init_profile(f);
      free_numbers(f);
      var = ast_variable_browse(cfg, cat);
      while (var) {
         if (!strcasecmp(var->name, "number")) {
            int idx = 0;

            /* Add a new number */
            ast_copy_string(numberstr, var->value, sizeof(numberstr));
            if ((tmp = strchr(numberstr, ','))) {
               *tmp++ = '\0';
               timeout = atoi(tmp);
               if (timeout < 0) {
                  timeout = 25;
               }
               if ((tmp = strchr(tmp, ','))) {
                  *tmp++ = '\0';
                  numorder = atoi(tmp);
                  if (numorder < 0)
                     numorder = 0;
               } else 
                  numorder = 0;
            } else {
               timeout = 25;
               numorder = 0;
            }

            if (!numorder) {
               idx = 1;
               AST_LIST_TRAVERSE(&f->numbers, nm, entry) 
                  idx++;
               numorder = idx;
            }
            cur = create_followme_number(numberstr, timeout, numorder);
            if (cur) {
               AST_LIST_INSERT_TAIL(&f->numbers, cur, entry);
            }
         } else {
            profile_set_param(f, var->name, var->value, var->lineno, 1);
            ast_debug(2, "Logging parameter %s with value %s from lineno %d\n", var->name, var->value, var->lineno);
         }
         var = var->next;
      } /* End while(var) loop */

      if (!new) 
         ast_mutex_unlock(&f->lock);
      else
         AST_RWLIST_INSERT_HEAD(&followmes, f, entry);
   }

   ast_config_destroy(cfg);

   AST_RWLIST_UNLOCK(&followmes);

   return 1;
}

static void clear_caller(struct findme_user *tmpuser)
{
   struct ast_channel *outbound;

   if (tmpuser && tmpuser->ochan && tmpuser->state >= 0) {
      outbound = tmpuser->ochan;
      ast_channel_lock(outbound);
      if (!outbound->cdr) {
         outbound->cdr = ast_cdr_alloc();
         if (outbound->cdr) {
            ast_cdr_init(outbound->cdr, outbound);
         }
      }
      if (outbound->cdr) {
         char tmp[256];

         snprintf(tmp, sizeof(tmp), "%s/%s", "Local", tmpuser->dialarg);
         ast_cdr_setapp(outbound->cdr, "FollowMe", tmp);
         ast_cdr_update(outbound);
         ast_cdr_start(outbound->cdr);
         ast_cdr_end(outbound->cdr);
         /* If the cause wasn't handled properly */
         if (ast_cdr_disposition(outbound->cdr, outbound->hangupcause)) {
            ast_cdr_failed(outbound->cdr);
         }
      } else {
         ast_log(LOG_WARNING, "Unable to create Call Detail Record\n");
      }
      ast_channel_unlock(outbound);
      ast_hangup(outbound);
      tmpuser->ochan = NULL;
   }
}

static void clear_calling_tree(struct findme_user_listptr *findme_user_list) 
{
   struct findme_user *tmpuser;

   AST_LIST_TRAVERSE(findme_user_list, tmpuser, entry) {
      clear_caller(tmpuser);
      tmpuser->cleared = 1;
   }
}

static void destroy_calling_tree(struct findme_user_listptr *findme_user_list)
{
   struct findme_user *fmuser;

   while ((fmuser = AST_LIST_REMOVE_HEAD(findme_user_list, entry))) {
      if (!fmuser->cleared) {
         clear_caller(fmuser);
      }
      ast_free(fmuser);
   }
   ast_free(findme_user_list);
}

static struct ast_channel *wait_for_winner(struct findme_user_listptr *findme_user_list, struct number *nm, struct ast_channel *caller, char *namerecloc, int *status, struct fm_args *tpargs) 
{
   struct ast_channel *watchers[256];
   int pos;
   struct ast_channel *winner;
   struct ast_frame *f;
   int ctstatus = 0;
   int dg;
   struct findme_user *tmpuser;
   int to = 0;
   int livechannels = 0;
   int tmpto;
   long totalwait = 0, wtd = 0, towas = 0;
   char *callfromname;
   char *pressbuttonname;

   /* ------------ wait_for_winner_channel start --------------- */ 

   callfromname = ast_strdupa(tpargs->callfromprompt);
   pressbuttonname = ast_strdupa(tpargs->optionsprompt);

   if (AST_LIST_EMPTY(findme_user_list)) {
      ast_verb(3, "couldn't reach at this number.\n");
      return NULL;
   }

   if (!caller) {
      ast_verb(3, "Original caller hungup. Cleanup.\n");
      clear_calling_tree(findme_user_list);
      return NULL;
   }

   totalwait = nm->timeout * 1000;

   while (!ctstatus) {
      to = 1000;
      pos = 1; 
      livechannels = 0;
      watchers[0] = caller;

      dg = 0;
      winner = NULL;
      AST_LIST_TRAVERSE(findme_user_list, tmpuser, entry) {
         if (tmpuser->state >= 0 && tmpuser->ochan) {
            if (tmpuser->state == 3) 
               tmpuser->digts += (towas - wtd);
            if (tmpuser->digts && (tmpuser->digts > featuredigittimeout)) {
               ast_verb(3, "We've been waiting for digits longer than we should have.\n");
               if (!ast_strlen_zero(namerecloc)) {
                  tmpuser->state = 1;
                  tmpuser->digts = 0;
                  if (!ast_streamfile(tmpuser->ochan, callfromname, tmpuser->ochan->language)) {
                     ast_sched_runq(tmpuser->ochan->sched);
                  } else {
                     ast_log(LOG_WARNING, "Unable to playback %s.\n", callfromname);
                     return NULL;
                  }
               } else {
                  tmpuser->state = 2;
                  tmpuser->digts = 0;
                  if (!ast_streamfile(tmpuser->ochan, tpargs->norecordingprompt, tmpuser->ochan->language))
                     ast_sched_runq(tmpuser->ochan->sched);
                  else {
                     ast_log(LOG_WARNING, "Unable to playback %s.\n", tpargs->norecordingprompt);
                     return NULL;
                  }
               }
            }
            if (tmpuser->ochan->stream) {
               ast_sched_runq(tmpuser->ochan->sched);
               tmpto = ast_sched_wait(tmpuser->ochan->sched);
               if (tmpto > 0 && tmpto < to)
                  to = tmpto;
               else if (tmpto < 0 && !tmpuser->ochan->timingfunc) {
                  ast_stopstream(tmpuser->ochan);
                  if (tmpuser->state == 1) {
                     ast_verb(3, "Playback of the call-from file appears to be done.\n");
                     if (!ast_streamfile(tmpuser->ochan, namerecloc, tmpuser->ochan->language)) {
                        tmpuser->state = 2;
                     } else {
                        ast_log(LOG_NOTICE, "Unable to playback %s. Maybe the caller didn't record their name?\n", namerecloc);
                        memset(tmpuser->yn, 0, sizeof(tmpuser->yn));
                        tmpuser->ynidx = 0;
                        if (!ast_streamfile(tmpuser->ochan, pressbuttonname, tmpuser->ochan->language))
                           tmpuser->state = 3;
                        else {
                           ast_log(LOG_WARNING, "Unable to playback %s.\n", pressbuttonname);
                           return NULL;
                        } 
                     }
                  } else if (tmpuser->state == 2) {
                     ast_verb(3, "Playback of name file appears to be done.\n");
                     memset(tmpuser->yn, 0, sizeof(tmpuser->yn));
                     tmpuser->ynidx = 0;
                     if (!ast_streamfile(tmpuser->ochan, pressbuttonname, tmpuser->ochan->language)) {
                        tmpuser->state = 3;
                     } else {
                        return NULL;
                     } 
                  } else if (tmpuser->state == 3) {
                     ast_verb(3, "Playback of the next step file appears to be done.\n");
                     tmpuser->digts = 0;
                  }
               }
            }
            watchers[pos++] = tmpuser->ochan;
            livechannels++;
         }
      }

      tmpto = to;
      if (to < 0) {
         to = 1000;
         tmpto = 1000;
      }
      towas = to;
      winner = ast_waitfor_n(watchers, pos, &to);
      tmpto -= to;
      totalwait -= tmpto;
      wtd = to;
      if (totalwait <= 0) {
         ast_verb(3, "We've hit our timeout for this step. Drop everyone and move on to the next one. %ld\n", totalwait);
         clear_calling_tree(findme_user_list);
         return NULL;
      }
      if (winner) {
         /* Need to find out which channel this is */
         dg = 0;
         while ((winner != watchers[dg]) && (dg < 256))
            dg++;
         AST_LIST_TRAVERSE(findme_user_list, tmpuser, entry)
            if (tmpuser->ochan == winner)
               break;
         f = ast_read(winner);
         if (f) {
            if (f->frametype == AST_FRAME_CONTROL) {
               switch (f->subclass.integer) {
               case AST_CONTROL_HANGUP:
                  ast_verb(3, "%s received a hangup frame.\n", winner->name);
                  if (f->data.uint32) {
                     winner->hangupcause = f->data.uint32;
                  }
                  if (dg == 0) {
                     ast_verb(3, "The calling channel hungup. Need to drop everyone else.\n");
                     clear_calling_tree(findme_user_list);
                     ctstatus = -1;
                  }
                  break;
               case AST_CONTROL_ANSWER:
                  ast_verb(3, "%s answered %s\n", winner->name, caller->name);
                  /* If call has been answered, then the eventual hangup is likely to be normal hangup */ 
                  winner->hangupcause = AST_CAUSE_NORMAL_CLEARING;
                  caller->hangupcause = AST_CAUSE_NORMAL_CLEARING;
                  ast_verb(3, "Starting playback of %s\n", callfromname);
                  if (dg > 0) {
                     if (!ast_strlen_zero(namerecloc)) {
                        if (!ast_streamfile(winner, callfromname, winner->language)) {
                           ast_sched_runq(winner->sched);
                           tmpuser->state = 1;
                        } else {
                           ast_log(LOG_WARNING, "Unable to playback %s.\n", callfromname);
                           ast_frfree(f);
                           return NULL;
                        }
                     } else {
                        tmpuser->state = 2;
                        if (!ast_streamfile(tmpuser->ochan, tpargs->norecordingprompt, tmpuser->ochan->language))
                           ast_sched_runq(tmpuser->ochan->sched);
                        else {
                           ast_log(LOG_WARNING, "Unable to playback %s.\n", tpargs->norecordingprompt);
                           ast_frfree(f);
                           return NULL;
                        }
                     }
                  }
                  break;
               case AST_CONTROL_BUSY:
                  ast_verb(3, "%s is busy\n", winner->name);
                  break;
               case AST_CONTROL_CONGESTION:
                  ast_verb(3, "%s is circuit-busy\n", winner->name);
                  break;
               case AST_CONTROL_RINGING:
                  ast_verb(3, "%s is ringing\n", winner->name);
                  break;
               case AST_CONTROL_PROGRESS:
                  ast_verb(3, "%s is making progress passing it to %s\n", winner->name, caller->name);
                  break;
               case AST_CONTROL_VIDUPDATE:
                  ast_verb(3, "%s requested a video update, passing it to %s\n", winner->name, caller->name);
                  break;
               case AST_CONTROL_SRCUPDATE:
                  ast_verb(3, "%s requested a source update, passing it to %s\n", winner->name, caller->name);
                  break;
               case AST_CONTROL_PROCEEDING:
                  ast_verb(3, "%s is proceeding passing it to %s\n", winner->name,caller->name);
                  break;
               case AST_CONTROL_HOLD:
                  ast_verb(3, "Call on %s placed on hold\n", winner->name);
                  break;
               case AST_CONTROL_UNHOLD:
                  ast_verb(3, "Call on %s left from hold\n", winner->name);
                  break;
               case AST_CONTROL_OFFHOOK:
               case AST_CONTROL_FLASH:
                  /* Ignore going off hook and flash */
                  break;
               case -1:
                  ast_verb(3, "%s stopped sounds\n", winner->name);
                  break;
               default:
                  ast_debug(1, "Dunno what to do with control type %d\n", f->subclass.integer);
                  break;
               }
            } 
            if (tmpuser && tmpuser->state == 3 && f->frametype == AST_FRAME_DTMF) {
               if (winner->stream)
                  ast_stopstream(winner);
               tmpuser->digts = 0;
               ast_debug(1, "DTMF received: %c\n", (char) f->subclass.integer);
               tmpuser->yn[tmpuser->ynidx] = (char) f->subclass.integer;
               tmpuser->ynidx++;
               ast_debug(1, "DTMF string: %s\n", tmpuser->yn);
               if (tmpuser->ynidx >= ynlongest) {
                  ast_debug(1, "reached longest possible match - doing evals\n");
                  if (!strcmp(tmpuser->yn, tpargs->takecall)) {
                     ast_debug(1, "Match to take the call!\n");
                     ast_frfree(f);
                     return tmpuser->ochan;
                  }
                  if (!strcmp(tmpuser->yn, tpargs->nextindp)) {
                     ast_debug(1, "Next in dial plan step requested.\n");
                     *status = 1;
                     ast_frfree(f);
                     return NULL;
                  }

               }
            }

            ast_frfree(f);
         } else {
            if (winner) {
               ast_debug(1, "we didn't get a frame. hanging up. dg is %d\n",dg);                   
               if (!dg) {
                  clear_calling_tree(findme_user_list);
                  return NULL;
               } else {
                  tmpuser->state = -1;
                  ast_hangup(winner);  
                  livechannels--;
                  ast_debug(1, "live channels left %d\n", livechannels);
                  if (!livechannels) {
                     ast_verb(3, "no live channels left. exiting.\n");
                     return NULL;
                  }
               }
            }
         }

      } else
         ast_debug(1, "timed out waiting for action\n");
   }

   /* --- WAIT FOR WINNER NUMBER END! -----------*/
   return NULL;
}

static void findmeexec(struct fm_args *tpargs)
{
   struct number *nm;
   struct ast_channel *outbound;
   struct ast_channel *caller;
   struct ast_channel *winner = NULL;
   char dialarg[512];
   char num[512];
   int dg, idx;
   char *rest, *number;
   struct findme_user *tmpuser;
   struct findme_user *fmuser;
   struct findme_user_listptr *findme_user_list;
   int status;

   findme_user_list = ast_calloc(1, sizeof(*findme_user_list));
   AST_LIST_HEAD_INIT_NOLOCK(findme_user_list);

   /* We're going to figure out what the longest possible string of digits to collect is */
   ynlongest = 0;
   if (strlen(tpargs->takecall) > ynlongest) {
      ynlongest = strlen(tpargs->takecall);
   }
   if (strlen(tpargs->nextindp) > ynlongest) {
      ynlongest = strlen(tpargs->nextindp);
   }

   caller = tpargs->chan;
   for (idx = 1; !winner && !ast_check_hangup(caller); ++idx) {
      /* Find next followme numbers to dial. */
      AST_LIST_TRAVERSE(&tpargs->cnumbers, nm, entry) {
         if (nm->order == idx) {
            break;
         }
      }
      if (!nm) {
         break;
      }

      ast_debug(2, "Number %s timeout %ld\n", nm->number,nm->timeout);

      ast_copy_string(num, nm->number, sizeof(num));
      for (number = num; number; number = rest) {
         rest = strchr(number, '&');
         if (rest) {
            *rest++ = 0;
         }

         /* We check if the extension exists, before creating the ast_channel struct */
         if (!ast_exists_extension(caller, tpargs->context, number, 1, S_COR(caller->caller.id.number.valid, caller->caller.id.number.str, NULL))) {
            ast_log(LOG_ERROR, "Extension '%s@%s' doesn't exist\n", number, tpargs->context);
            continue;
         }

         if (!strcmp(tpargs->context, "")) {
            snprintf(dialarg, sizeof(dialarg), "%s", number);
         } else {
            snprintf(dialarg, sizeof(dialarg), "%s@%s", number, tpargs->context);
         }

         tmpuser = ast_calloc(1, sizeof(*tmpuser));
         if (!tmpuser) {
            continue;
         }

         outbound = ast_request("Local", ast_best_codec(caller->nativeformats), caller, dialarg, &dg);
         if (outbound) {
            ast_channel_lock_both(caller, outbound);
            ast_connected_line_copy_from_caller(&outbound->connected, &caller->caller);
            ast_channel_inherit_variables(caller, outbound);
            ast_channel_datastore_inherit(caller, outbound);
            ast_string_field_set(outbound, language, caller->language);
            ast_string_field_set(outbound, accountcode, caller->accountcode);
            ast_string_field_set(outbound, musicclass, caller->musicclass);
            ast_channel_unlock(outbound);
            ast_channel_unlock(caller);
            ast_verb(3, "calling Local/%s\n", dialarg);
            if (!ast_call(outbound, dialarg, 0)) {
               tmpuser->ochan = outbound;
               tmpuser->state = 0;
               tmpuser->cleared = 0;
               ast_copy_string(tmpuser->dialarg, dialarg, sizeof(dialarg));
               AST_LIST_INSERT_TAIL(findme_user_list, tmpuser, entry);
            } else {
               ast_verb(3, "couldn't reach at this number.\n");
               ast_channel_lock(outbound);
               if (!outbound->cdr) {
                  outbound->cdr = ast_cdr_alloc();
               }
               if (outbound->cdr) {
                  char tmp[256];

                  ast_cdr_init(outbound->cdr, outbound);
                  snprintf(tmp, sizeof(tmp), "%s/%s", "Local", dialarg);
                  ast_cdr_setapp(outbound->cdr, "FollowMe", tmp);
                  ast_cdr_update(outbound);
                  ast_cdr_start(outbound->cdr);
                  ast_cdr_end(outbound->cdr);
                  /* If the cause wasn't handled properly */
                  if (ast_cdr_disposition(outbound->cdr, outbound->hangupcause)) {
                     ast_cdr_failed(outbound->cdr);
                  }
               } else {
                  ast_log(LOG_ERROR, "Unable to create Call Detail Record\n");
               }
               ast_channel_unlock(outbound);
               ast_hangup(outbound);
               ast_free(tmpuser);
            }
         } else {
            ast_log(LOG_WARNING, "Unable to allocate a channel for Local/%s cause: %s\n", dialarg, ast_cause2str(dg));
            ast_free(tmpuser);
         }
      }

      if (AST_LIST_EMPTY(findme_user_list)) {
         continue;
      }

      status = 0;
      winner = wait_for_winner(findme_user_list, nm, caller, tpargs->namerecloc, &status, tpargs);

      /* Clean up all calls but winner. */
      while ((fmuser = AST_LIST_REMOVE_HEAD(findme_user_list, entry))) {
         if (!fmuser->cleared && fmuser->ochan != winner) {
            clear_caller(fmuser);
         }
         ast_free(fmuser);
      }
   }
   destroy_calling_tree(findme_user_list);
   if (!winner) {
      tpargs->status = 1;
   } else {
      tpargs->status = 100;
      tpargs->outbound = winner;
   }
}

static struct call_followme *find_realtime(const char *name)
{
   struct ast_variable *var = ast_load_realtime("followme", "name", name, SENTINEL), *v;
   struct ast_config *cfg;
   const char *catg;
   struct call_followme *new;
   struct ast_str *str = ast_str_create(16);

   if (!var) {
      return NULL;
   }

   if (!(new = alloc_profile(name))) {
      return NULL;
   }

   for (v = var; v; v = v->next) {
      if (!strcasecmp(v->name, "active")) {
         if (ast_false(v->value)) {
            ast_mutex_destroy(&new->lock);
            ast_free(new);
            return NULL;
         }
      } else {
         profile_set_param(new, v->name, v->value, 0, 0);
      }
   }

   ast_variables_destroy(var);
   new->realtime = 1;

   /* Load numbers */
   if (!(cfg = ast_load_realtime_multientry("followme_numbers", "ordinal LIKE", "%", "name", name, SENTINEL))) {
      ast_mutex_destroy(&new->lock);
      ast_free(new);
      return NULL;
   }

   for (catg = ast_category_browse(cfg, NULL); catg; catg = ast_category_browse(cfg, catg)) {
      const char *numstr, *timeoutstr, *ordstr;
      int timeout;
      struct number *cur;
      if (!(numstr = ast_variable_retrieve(cfg, catg, "phonenumber"))) {
         continue;
      }
      if (!(timeoutstr = ast_variable_retrieve(cfg, catg, "timeout")) || sscanf(timeoutstr, "%30d", &timeout) != 1 || timeout < 1) {
         timeout = 25;
      }
      /* This one has to exist; it was part of the query */
      ordstr = ast_variable_retrieve(cfg, catg, "ordinal");
      ast_str_set(&str, 0, "%s", numstr);
      if ((cur = create_followme_number(ast_str_buffer(str), timeout, atoi(ordstr)))) {
         AST_LIST_INSERT_TAIL(&new->numbers, cur, entry);
      }
   }
   ast_config_destroy(cfg);

   return new;
}

static void end_bridge_callback(void *data)
{
   char buf[80];
   time_t end;
   struct ast_channel *chan = data;

   time(&end);

   ast_channel_lock(chan);
   if (chan->cdr->answer.tv_sec) {
      snprintf(buf, sizeof(buf), "%ld", (long) end - chan->cdr->answer.tv_sec);
      pbx_builtin_setvar_helper(chan, "ANSWEREDTIME", buf);
   }

   if (chan->cdr->start.tv_sec) {
      snprintf(buf, sizeof(buf), "%ld", (long) end - chan->cdr->start.tv_sec);
      pbx_builtin_setvar_helper(chan, "DIALEDTIME", buf);
   }
   ast_channel_unlock(chan);
}

static void end_bridge_callback_data_fixup(struct ast_bridge_config *bconfig, struct ast_channel *originator, struct ast_channel *terminator)
{
   bconfig->end_bridge_callback_data = originator;
}

static int app_exec(struct ast_channel *chan, const char *data)
{
   struct fm_args targs = { 0, };
   struct ast_bridge_config config;
   struct call_followme *f;
   struct number *nm, *newnm;
   int res = 0;
   char *argstr;
   char namerecloc[255];
   int duration = 0;
   struct ast_channel *caller;
   struct ast_channel *outbound;
   AST_DECLARE_APP_ARGS(args,
      AST_APP_ARG(followmeid);
      AST_APP_ARG(options);
   );

   if (ast_strlen_zero(data)) {
      ast_log(LOG_WARNING, "%s requires an argument (followmeid)\n", app);
      return -1;
   }

   argstr = ast_strdupa((char *) data);

   AST_STANDARD_APP_ARGS(args, argstr);

   if (ast_strlen_zero(args.followmeid)) {
      ast_log(LOG_WARNING, "%s requires an argument (followmeid)\n", app);
      return -1;
   }

   AST_RWLIST_RDLOCK(&followmes);
   AST_RWLIST_TRAVERSE(&followmes, f, entry) {
      if (!strcasecmp(f->name, args.followmeid) && (f->active))
         break;
   }
   AST_RWLIST_UNLOCK(&followmes);

   ast_debug(1, "New profile %s.\n", args.followmeid);

   if (!f) {
      f = find_realtime(args.followmeid);
   }

   if (!f) {
      ast_log(LOG_WARNING, "Profile requested, %s, not found in the configuration.\n", args.followmeid);
      return 0;
   }

   /* XXX TODO: Reinsert the db check value to see whether or not follow-me is on or off */
   if (args.options) 
      ast_app_parse_options(followme_opts, &targs.followmeflags, NULL, args.options);

   /* Lock the profile lock and copy out everything we need to run with before unlocking it again */
   ast_mutex_lock(&f->lock);
   targs.mohclass = ast_strdupa(f->moh);
   ast_copy_string(targs.context, f->context, sizeof(targs.context));
   ast_copy_string(targs.takecall, f->takecall, sizeof(targs.takecall));
   ast_copy_string(targs.nextindp, f->nextindp, sizeof(targs.nextindp));
   ast_copy_string(targs.callfromprompt, f->callfromprompt, sizeof(targs.callfromprompt));
   ast_copy_string(targs.norecordingprompt, f->norecordingprompt, sizeof(targs.norecordingprompt));
   ast_copy_string(targs.optionsprompt, f->optionsprompt, sizeof(targs.optionsprompt));
   ast_copy_string(targs.plsholdprompt, f->plsholdprompt, sizeof(targs.plsholdprompt));
   ast_copy_string(targs.statusprompt, f->statusprompt, sizeof(targs.statusprompt));
   ast_copy_string(targs.sorryprompt, f->sorryprompt, sizeof(targs.sorryprompt));
   /* Copy the numbers we're going to use into another list in case the master list should get modified 
      (and locked) while we're trying to do a follow-me */
   AST_LIST_HEAD_INIT_NOLOCK(&targs.cnumbers);
   AST_LIST_TRAVERSE(&f->numbers, nm, entry) {
      newnm = create_followme_number(nm->number, nm->timeout, nm->order);
      if (newnm) {
         AST_LIST_INSERT_TAIL(&targs.cnumbers, newnm, entry);
      }
   }
   ast_mutex_unlock(&f->lock);

   /* Answer the call */
   if (chan->_state != AST_STATE_UP) {
      ast_answer(chan);
   }

   if (ast_test_flag(&targs.followmeflags, FOLLOWMEFLAG_STATUSMSG)) 
      ast_stream_and_wait(chan, targs.statusprompt, "");

   snprintf(namerecloc,sizeof(namerecloc),"%s/followme.%s",ast_config_AST_SPOOL_DIR,chan->uniqueid);
   duration = 5;

   if (ast_test_flag(&targs.followmeflags, FOLLOWMEFLAG_RECORDNAME)) 
      if (ast_play_and_record(chan, "vm-rec-name", namerecloc, 5, "sln", &duration, NULL, ast_dsp_get_threshold_from_settings(THRESHOLD_SILENCE), 0, NULL) < 0)
         goto outrun;

   if (!ast_fileexists(namerecloc, NULL, chan->language))
      ast_copy_string(namerecloc, "", sizeof(namerecloc));
   if (!ast_test_flag(&targs.followmeflags, FOLLOWMEFLAG_DISABLEHOLDPROMPT)) {
      if (ast_streamfile(chan, targs.plsholdprompt, chan->language))
         goto outrun;
      if (ast_waitstream(chan, "") < 0)
         goto outrun;
   }
   ast_moh_start(chan, S_OR(targs.mohclass, NULL), NULL);

   targs.status = 0;
   targs.chan = chan;
   ast_copy_string(targs.namerecloc, namerecloc, sizeof(targs.namerecloc));

   findmeexec(&targs);

   while ((nm = AST_LIST_REMOVE_HEAD(&targs.cnumbers, entry)))
      ast_free(nm);

   if (!ast_strlen_zero(namerecloc))
      unlink(namerecloc);

   if (targs.status != 100) {
      ast_moh_stop(chan);
      if (ast_test_flag(&targs.followmeflags, FOLLOWMEFLAG_UNREACHABLEMSG)) 
         ast_stream_and_wait(chan, targs.sorryprompt, "");
      res = 0;
   } else {
      caller = chan;
      outbound = targs.outbound;
      /* Bridge the two channels. */

      memset(&config, 0, sizeof(config));
      ast_set_flag(&(config.features_callee), AST_FEATURE_REDIRECT);
      ast_set_flag(&(config.features_callee), AST_FEATURE_AUTOMON);
      ast_set_flag(&(config.features_caller), AST_FEATURE_AUTOMON);
      config.end_bridge_callback = end_bridge_callback;
      config.end_bridge_callback_data = chan;
      config.end_bridge_callback_data_fixup = end_bridge_callback_data_fixup;

      ast_moh_stop(caller);
      /* Be sure no generators are left on it */
      ast_deactivate_generator(caller);
      /* Make sure channels are compatible */
      res = ast_channel_make_compatible(caller, outbound);
      if (res < 0) {
         ast_log(LOG_WARNING, "Had to drop call because I couldn't make %s compatible with %s\n", caller->name, outbound->name);
         ast_hangup(outbound);
         goto outrun;
      }
      res = ast_bridge_call(caller, outbound, &config);
      ast_hangup(outbound);
   }

outrun:

   if (f->realtime) {
      /* Not in list */
      free_numbers(f);
      ast_free(f);
   }

   return res;
}

static int unload_module(void)
{
   struct call_followme *f;

   ast_unregister_application(app);

   /* Free Memory. Yeah! I'm free! */
   AST_RWLIST_WRLOCK(&followmes);
   while ((f = AST_RWLIST_REMOVE_HEAD(&followmes, entry))) {
      free_numbers(f);
      ast_free(f);
   }

   AST_RWLIST_UNLOCK(&followmes);

   return 0;
}

static int load_module(void)
{
   if(!reload_followme(0))
      return AST_MODULE_LOAD_DECLINE;

   return ast_register_application_xml(app, app_exec);
}

static int reload(void)
{
   reload_followme(1);

   return 0;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Find-Me/Follow-Me Application",
      .load = load_module,
      .unload = unload_module,
      .reload = reload,
          );