manager.c

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/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * Channel Management and more
 * 
 * Copyright (C) 1999, Mark Spencer
 *
 * Mark Spencer <markster@linux-support.net>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include <sys/poll.h>
#include <asterisk/channel.h>
#include <asterisk/file.h>
#include <asterisk/manager.h>
#include <asterisk/config.h>
#include <asterisk/lock.h>
#include <asterisk/logger.h>
#include <asterisk/options.h>
#include <asterisk/cli.h>
#include <asterisk/app.h>
#include <asterisk/pbx.h>
#include <asterisk/md5.h>
#include <asterisk/acl.h>
#include <asterisk/utils.h>

struct fast_originate_helper
{
   char tech[256];
   char data[256];
   int timeout;
   char app[256];
   char appdata[256];
   char callerid[256];
   char variable[256];
   char account[256];
   char context[256];
   char exten[256];
   int priority;
};

static int enabled = 0;
static int portno = DEFAULT_MANAGER_PORT;
static int asock = -1;
static pthread_t t;
AST_MUTEX_DEFINE_STATIC(sessionlock);
static int block_sockets = 0;

static struct permalias {
   int num;
   char *label;
} perms[] = {
   { EVENT_FLAG_SYSTEM, "system" },
   { EVENT_FLAG_CALL, "call" },
   { EVENT_FLAG_LOG, "log" },
   { EVENT_FLAG_VERBOSE, "verbose" },
   { EVENT_FLAG_COMMAND, "command" },
   { EVENT_FLAG_AGENT, "agent" },
   { EVENT_FLAG_USER, "user" },
   { -1, "all" },
};

static struct mansession *sessions = NULL;
static struct manager_action *first_action = NULL;
AST_MUTEX_DEFINE_STATIC(actionlock);

int ast_carefulwrite(int fd, char *s, int len, int timeoutms) 
{
   /* Try to write string, but wait no more than ms milliseconds
      before timing out */
   int res=0;
   struct pollfd fds[1];
   while(len) {
      res = write(fd, s, len);
      if ((res < 0) && (errno != EAGAIN)) {
         return -1;
      }
      if (res < 0) res = 0;
      len -= res;
      s += res;
      fds[0].fd = fd;
      fds[0].events = POLLOUT;
      /* Wait until writable again */
      res = poll(fds, 1, timeoutms);
      if (res < 1)
         return -1;
   }
   return res;
}

static char *complete_show_mancmd(char *line, char *word, int pos, int state)
{
   struct manager_action *cur = first_action;
   int which = 0;

   ast_mutex_lock(&actionlock);
   while (cur) { /* Walk the list of actions */
      if (!strncasecmp(word, cur->action, strlen(word))) {
         if (++which > state) {
            char *ret = strdup(cur->action);
            ast_mutex_unlock(&actionlock);
            return ret;
         }
      }
      cur = cur->next;
   }
   ast_mutex_unlock(&actionlock);
   return NULL;
}

static int handle_showmancmd(int fd, int argc, char *argv[])
{
   struct manager_action *cur = first_action;
   int num;

   if (argc != 4)
      return RESULT_SHOWUSAGE;
   ast_mutex_lock(&actionlock);
   while (cur) { /* Walk the list of actions */
      for (num = 3; num < argc; num++) {
         if (!strcasecmp(cur->action, argv[num])) {
            ast_cli(fd, "Action: %s\nSynopsis: %s\n%s\n", cur->action, cur->synopsis, cur->description ? cur->description : "");
         }
      }
      cur = cur->next;
   }

   ast_mutex_unlock(&actionlock);
   return RESULT_SUCCESS;
}

static int handle_showmancmds(int fd, int argc, char *argv[])
{
   struct manager_action *cur = first_action;
   char *format = "  %-15.15s  %-45.45s\n";

   ast_mutex_lock(&actionlock);
   ast_cli(fd, format, "Action", "Synopsis");
   while (cur) { /* Walk the list of actions */
      ast_cli(fd, format, cur->action, cur->synopsis);
      cur = cur->next;
   }

   ast_mutex_unlock(&actionlock);
   return RESULT_SUCCESS;
}

static int handle_showmanconn(int fd, int argc, char *argv[])
{
   struct mansession *s;
   char *format = "  %-15.15s  %-15.15s\n";
   ast_mutex_lock(&sessionlock);
   s = sessions;
   ast_cli(fd, format, "Username", "IP Address");
   while (s) {
      ast_cli(fd, format,s->username, inet_ntoa(s->sin.sin_addr));
      s = s->next;
   }

   ast_mutex_unlock(&sessionlock);
   return RESULT_SUCCESS;
}

static char showmancmd_help[] = 
"Usage: show manager command <actionname>\n"
"  Shows the detailed description for a specific manager command.\n";

static char showmancmds_help[] = 
"Usage: show manager commands\n"
"  Prints a listing of all the available manager commands.\n";

static char showmanconn_help[] = 
"Usage: show manager connected\n"
"  Prints a listing of the users that are connected to the\n"
"manager interface.\n";

static struct ast_cli_entry show_mancmd_cli =
   { { "show", "manager", "command", NULL },
   handle_showmancmd, "Show manager command", showmancmd_help, complete_show_mancmd };

static struct ast_cli_entry show_mancmds_cli =
   { { "show", "manager", "commands", NULL },
   handle_showmancmds, "Show manager commands", showmancmds_help };

static struct ast_cli_entry show_manconn_cli =
   { { "show", "manager", "connected", NULL },
   handle_showmanconn, "Show connected manager users", showmanconn_help };

static void destroy_session(struct mansession *s)
{
   struct mansession *cur, *prev = NULL;
   ast_mutex_lock(&sessionlock);
   cur = sessions;
   while(cur) {
      if (cur == s)
         break;
      prev = cur;
      cur = cur->next;
   }
   if (cur) {
      if (prev)
         prev->next = cur->next;
      else
         sessions = cur->next;
      if (s->fd > -1)
         close(s->fd);
      free(s);
   } else
      ast_log(LOG_WARNING, "Trying to delete non-existant session %p?\n", s);
   ast_mutex_unlock(&sessionlock);
   
}

char *astman_get_header(struct message *m, char *var)
{
   char cmp[80];
   int x;
   snprintf(cmp, sizeof(cmp), "%s: ", var);
   for (x=0;x<m->hdrcount;x++)
      if (!strncasecmp(cmp, m->headers[x], strlen(cmp)))
         return m->headers[x] + strlen(cmp);
   return "";
}

void astman_send_error(struct mansession *s, struct message *m, char *error)
{
   char *id = astman_get_header(m,"ActionID");
   ast_mutex_lock(&s->lock);
   ast_cli(s->fd, "Response: Error\r\n");
   if (id && !ast_strlen_zero(id))
      ast_cli(s->fd, "ActionID: %s\r\n",id);
   ast_cli(s->fd, "Message: %s\r\n\r\n", error);
   ast_mutex_unlock(&s->lock);
}

void astman_send_response(struct mansession *s, struct message *m, char *resp, char *msg)
{
   char *id = astman_get_header(m,"ActionID");
   ast_mutex_lock(&s->lock);
   ast_cli(s->fd, "Response: %s\r\n", resp);
   if (id && !ast_strlen_zero(id))
      ast_cli(s->fd, "ActionID: %s\r\n",id);
   if (msg)
      ast_cli(s->fd, "Message: %s\r\n\r\n", msg);
   else
      ast_cli(s->fd, "\r\n");
   ast_mutex_unlock(&s->lock);
}

void astman_send_ack(struct mansession *s, struct message *m, char *msg)
{
   astman_send_response(s, m, "Success", msg);
}

static int get_perm(char *instr)
{
   char tmp[256];
   char *c;
   int x;
   int ret = 0;
   char *stringp=NULL;
   if (!instr)
      return 0;
   strncpy(tmp, instr, sizeof(tmp) - 1);
   stringp=tmp;
   c = strsep(&stringp, ",");
   while(c) {
      for (x=0;x<sizeof(perms) / sizeof(perms[0]);x++) {
         if (!strcasecmp(perms[x].label, c)) 
            ret |= perms[x].num;
      }
      c = strsep(&stringp, ",");
   }
   return ret;
}

static int set_eventmask(struct mansession *s, char *eventmask)
{
   if (!eventmask)
      return -1;
   if (!strcasecmp(eventmask, "on") || ast_true(eventmask)) {
      ast_mutex_lock(&s->lock);
      s->send_events = 1;
      ast_mutex_unlock(&s->lock);
      return 1;
   } else if (!strcasecmp(eventmask, "off") || ast_false(eventmask)) {
      ast_mutex_lock(&s->lock);
      s->send_events = 0;
      ast_mutex_unlock(&s->lock);
      return 0;
   }
   return -1;
}

static int authenticate(struct mansession *s, struct message *m)
{
   struct ast_config *cfg;
   char *cat;
   char *user = astman_get_header(m, "Username");
   char *pass = astman_get_header(m, "Secret");
   char *authtype = astman_get_header(m, "AuthType");
   char *key = astman_get_header(m, "Key");
   char *events = astman_get_header(m, "Events");
   
   cfg = ast_load("manager.conf");
   if (!cfg)
      return -1;
   cat = ast_category_browse(cfg, NULL);
   while(cat) {
      if (strcasecmp(cat, "general")) {
         /* This is a user */
         if (!strcasecmp(cat, user)) {
            struct ast_variable *v;
            struct ast_ha *ha = NULL;
            char *password = NULL;
            v = ast_variable_browse(cfg, cat);
            while (v) {
               if (!strcasecmp(v->name, "secret")) {
                  password = v->value;
               } else if (!strcasecmp(v->name, "permit") ||
                     !strcasecmp(v->name, "deny")) {
                     ha = ast_append_ha(v->name, v->value, ha);
               }                 
               v = v->next;
            }
            if (ha && !ast_apply_ha(ha, &(s->sin))) {
               ast_log(LOG_NOTICE, "%s failed to pass IP ACL as '%s'\n", inet_ntoa(s->sin.sin_addr), user);
               ast_free_ha(ha);
               ast_destroy(cfg);
               return -1;
            } else if (ha)
               ast_free_ha(ha);
            if (!strcasecmp(authtype, "MD5")) {
               if (key && !ast_strlen_zero(key) && s->challenge) {
                  int x;
                  int len=0;
                  char md5key[256] = "";
                  struct MD5Context md5;
                  unsigned char digest[16];
                  MD5Init(&md5);
                  MD5Update(&md5, s->challenge, strlen(s->challenge));
                  MD5Update(&md5, password, strlen(password));
                  MD5Final(digest, &md5);
                  for (x=0;x<16;x++)
                     len += sprintf(md5key + len, "%2.2x", digest[x]);
                  if (!strcmp(md5key, key))
                     break;
                  else {
                     ast_destroy(cfg);
                     return -1;
                  }
               }
            } else if (password && !strcasecmp(password, pass)) {
               break;
            } else {
               ast_log(LOG_NOTICE, "%s failed to authenticate as '%s'\n", inet_ntoa(s->sin.sin_addr), user);
               ast_destroy(cfg);
               return -1;
            }  
         }
      }
      cat = ast_category_browse(cfg, cat);
   }
   if (cat) {
      strncpy(s->username, cat, sizeof(s->username) - 1);
      s->readperm = get_perm(ast_variable_retrieve(cfg, cat, "read"));
      s->writeperm = get_perm(ast_variable_retrieve(cfg, cat, "write"));
      ast_destroy(cfg);
      if (events)
         set_eventmask(s, events);
      return 0;
   }
   ast_log(LOG_NOTICE, "%s tried to authenticate with non-existant user '%s'\n", inet_ntoa(s->sin.sin_addr), user);
   ast_destroy(cfg);
   return -1;
}

static char mandescr_ping[] = 
"Description: A 'Ping' action will ellicit a 'Pong' response.  Used to keep the "
"  manager connection open.\n"
"Variables: NONE\n";

static int action_ping(struct mansession *s, struct message *m)
{
   astman_send_response(s, m, "Pong", NULL);
   return 0;
}

static char mandescr_listcommands[] = 
"Description: Returns the action name and synopsis for every\n"
"  action that is available to the user\n"
"Variables: NONE\n";

static int action_listcommands(struct mansession *s, struct message *m)
{
   struct manager_action *cur = first_action;
   char idText[256] = "";
   char *id = astman_get_header(m,"ActionID");

   if (id && !ast_strlen_zero(id))
      snprintf(idText,256,"ActionID: %s\r\n",id);
   ast_cli(s->fd, "Response: Success\r\n%s", idText);
   ast_mutex_lock(&actionlock);
   while (cur) { /* Walk the list of actions */
      if ((s->writeperm & cur->authority) == cur->authority)
         ast_cli(s->fd, "%s: %s\r\n", cur->action, cur->synopsis);
      cur = cur->next;
   }
   ast_mutex_unlock(&actionlock);
   ast_cli(s->fd, "\r\n");

   return 0;
}

static int action_events(struct mansession *s, struct message *m)
{
   char *mask = astman_get_header(m, "EventMask");
   int res;

   res = set_eventmask(s, mask);
   if (res > 0)
      astman_send_response(s, m, "Events On", NULL);
   else if (res == 0)
      astman_send_response(s, m, "Events Off", NULL);
   else
      astman_send_response(s, m, "EventMask parse error", NULL);
   return 0;
}

static int action_logoff(struct mansession *s, struct message *m)
{
   astman_send_response(s, m, "Goodbye", "Thanks for all the fish.");
   return -1;
}

static int action_hangup(struct mansession *s, struct message *m)
{
   struct ast_channel *c = NULL;
   char *name = astman_get_header(m, "Channel");
   if (ast_strlen_zero(name)) {
      astman_send_error(s, m, "No channel specified");
      return 0;
   }
   c = ast_channel_walk_locked(NULL);
   while(c) {
      if (!strcasecmp(c->name, name)) {
         break;
      }
      ast_mutex_unlock(&c->lock);
      c = ast_channel_walk_locked(c);
   }
   if (!c) {
      astman_send_error(s, m, "No such channel");
      return 0;
   }
   ast_softhangup(c, AST_SOFTHANGUP_EXPLICIT);
   ast_mutex_unlock(&c->lock);
   astman_send_ack(s, m, "Channel Hungup");
   return 0;
}

static int action_setvar(struct mansession *s, struct message *m)
{
        struct ast_channel *c = NULL;
        char *name = astman_get_header(m, "Channel");
        char *varname = astman_get_header(m, "Variable");
        char *varval = astman_get_header(m, "Value");
   
   if (!strlen(name)) {
      astman_send_error(s, m, "No channel specified");
      return 0;
   }
   if (!strlen(varname)) {
      astman_send_error(s, m, "No variable specified");
      return 0;
   }

   c = ast_channel_walk_locked(NULL);
   while(c) {
      if (!strcasecmp(c->name, name)) {
         break;
      }
      ast_mutex_unlock(&c->lock);
      c = ast_channel_walk_locked(c);
   }
   if (!c) {
      astman_send_error(s, m, "No such channel");
      return 0;
   }
   
   pbx_builtin_setvar_helper(c,varname,varval);
     
   ast_mutex_unlock(&c->lock);
   astman_send_ack(s, m, "Variable Set");
   return 0;
}

static int action_getvar(struct mansession *s, struct message *m)
{
        struct ast_channel *c = NULL;
        char *name = astman_get_header(m, "Channel");
        char *varname = astman_get_header(m, "Variable");
   char *varval;

   if (!strlen(name)) {
      astman_send_error(s, m, "No channel specified");
      return 0;
   }
   if (!strlen(varname)) {
      astman_send_error(s, m, "No variable specified");
      return 0;
   }

   c = ast_channel_walk_locked(NULL);
   while(c) {
      if (!strcasecmp(c->name, name)) {
         break;
      }
      ast_mutex_unlock(&c->lock);
      c = ast_channel_walk_locked(c);
   }
   if (!c) {
      astman_send_error(s, m, "No such channel");
      return 0;
   }
   
   varval=pbx_builtin_getvar_helper(c,varname);
     
   ast_mutex_unlock(&c->lock);
   ast_cli(s->fd, "Response: Success\r\n"
      "%s: %s",varname,varval);

   return 0;
}


static int action_status(struct mansession *s, struct message *m)
{
   char *id = astman_get_header(m,"ActionID");
   char idText[256] = "";
   struct ast_channel *c;
   char bridge[256];
   astman_send_ack(s, m, "Channel status will follow");
   c = ast_channel_walk_locked(NULL);
        if (id && !ast_strlen_zero(id))
                snprintf(idText,256,"ActionID: %s\r\n",id);
   while(c) {
      if (c->bridge)
         snprintf(bridge, sizeof(bridge), "Link: %s\r\n", c->bridge->name);
      else
         strcpy(bridge, "");
      if (c->pbx) {
         ast_cli(s->fd,
         "Event: Status\r\n"
         "Channel: %s\r\n"
         "CallerID: %s\r\n"
         "State: %s\r\n"
         "Context: %s\r\n"
         "Extension: %s\r\n"
         "Priority: %d\r\n"
         "%s"
         "Uniqueid: %s\r\n"
         "%s"
         "\r\n",
         c->name, c->callerid ? c->callerid : "<unknown>", 
         ast_state2str(c->_state), c->context,
         c->exten, c->priority, bridge, c->uniqueid, idText);
      } else {
         ast_cli(s->fd,
         "Event: Status\r\n"
         "Channel: %s\r\n"
         "CallerID: %s\r\n"
         "State: %s\r\n"
         "%s"
         "Uniqueid: %s\r\n"
         "%s"
         "\r\n",
         c->name, c->callerid ? c->callerid : "<unknown>", 
         ast_state2str(c->_state), bridge, c->uniqueid, idText);
      }
      ast_mutex_unlock(&c->lock);
      c = ast_channel_walk_locked(c);
   }
   ast_cli(s->fd,
   "Event: StatusComplete\r\n"
   "%s"
   "\r\n",idText);
   return 0;
}

static int action_redirect(struct mansession *s, struct message *m)
{
   char *name = astman_get_header(m, "Channel");
   char *name2 = astman_get_header(m, "ExtraChannel");
   char *exten = astman_get_header(m, "Exten");
   char *context = astman_get_header(m, "Context");
   char *priority = astman_get_header(m, "Priority");
   struct ast_channel *chan, *chan2 = NULL;
   int pi = 0;
   int res;
   if (!name || ast_strlen_zero(name)) {
      astman_send_error(s, m, "Channel not specified");
      return 0;
   }
   if (!ast_strlen_zero(priority) && (sscanf(priority, "%d", &pi) != 1)) {
      astman_send_error(s, m, "Invalid priority\n");
      return 0;
   }
   chan = ast_get_channel_by_name_locked(name);
   if (!chan) {
      astman_send_error(s, m, "Channel not existant");
      return 0;
   }
   if (!ast_strlen_zero(name2))
      chan2 = ast_get_channel_by_name_locked(name2);
   res = ast_async_goto(chan, context, exten, pi);
   if (!res) {
      if (!ast_strlen_zero(name2)) {
         if (chan2)
            res = ast_async_goto(chan2, context, exten, pi);
         else
            res = -1;
         if (!res)
            astman_send_ack(s, m, "Dual Redirect successful");
         else
            astman_send_error(s, m, "Secondary redirect failed");
      } else
         astman_send_ack(s, m, "Redirect successful");
   } else
      astman_send_error(s, m, "Redirect failed");
   if (chan)
      ast_mutex_unlock(&chan->lock);
   if (chan2)
      ast_mutex_unlock(&chan2->lock);
   return 0;
}

static int action_command(struct mansession *s, struct message *m)
{
   char *cmd = astman_get_header(m, "Command");
   char *id = astman_get_header(m, "ActionID");
   ast_mutex_lock(&s->lock);
   s->blocking = 1;
   ast_mutex_unlock(&s->lock);
   ast_cli(s->fd, "Response: Follows\r\n");
   if (id && !ast_strlen_zero(id))
      ast_cli(s->fd, "ActionID: %s\r\n", id);
   /* FIXME: Wedge a ActionID response in here, waiting for later changes */
   ast_cli_command(s->fd, cmd);
   ast_cli(s->fd, "--END COMMAND--\r\n\r\n");
   ast_mutex_lock(&s->lock);
   s->blocking = 0;
   ast_mutex_unlock(&s->lock);
   return 0;
}

static void *fast_originate(void *data)
{
   struct fast_originate_helper *in = data;
   int res;
   int reason = 0;
   if (!ast_strlen_zero(in->app)) {
      res = ast_pbx_outgoing_app(in->tech, AST_FORMAT_SLINEAR, in->data, in->timeout, in->app, in->appdata, &reason, 1, !ast_strlen_zero(in->callerid) ? in->callerid : NULL, in->variable, in->account);
   } else {
      res = ast_pbx_outgoing_exten(in->tech, AST_FORMAT_SLINEAR, in->data, in->timeout, in->context, in->exten, in->priority, &reason, 1, !ast_strlen_zero(in->callerid) ? in->callerid : NULL, in->variable, in->account);
   }   
   free(in);
   return NULL;
}

static char mandescr_originate[] = 
"Description: Generates an outgoing call to a Extension/Context/Priority or\n"
"  Application/Data\n"
"Variables: (Names marked with * are required)\n"
"  *Channel: Channel name to call\n"
"  Exten: Extension to use (requires 'Context' and 'Priority')\n"
"  Context: Context to use (requires 'Exten' and 'Priority')\n"
"  Priority: Priority to use (requires 'Exten' and 'Context')\n"
"  Application: Application to use\n"
"  Data: Data to use (requires 'Application')\n"
"  Timeout: How long to wait for call to be answered (in ms)\n"
"  CallerID: Caller ID to be set on the outgoing channel\n"
"  Variable: Channel variable to set (VAR1=value1|VAR2=value2)\n"
"  Account: Account code\n"
"  Async: Set to 'true' for fast origination\n";

static int action_originate(struct mansession *s, struct message *m)
{
   char *name = astman_get_header(m, "Channel");
   char *exten = astman_get_header(m, "Exten");
   char *context = astman_get_header(m, "Context");
   char *priority = astman_get_header(m, "Priority");
   char *timeout = astman_get_header(m, "Timeout");
   char *callerid = astman_get_header(m, "CallerID");
      char *variable = astman_get_header(m, "Variable");
      char *account = astman_get_header(m, "Account");
   char *app = astman_get_header(m, "Application");
   char *appdata = astman_get_header(m, "Data");
   char *async = astman_get_header(m, "Async");
   char *tech, *data;
   int pi = 0;
   int res;
   int to = 30000;
   int reason = 0;
   char tmp[256];
   pthread_t th;
   pthread_attr_t attr;
   if (!name) {
      astman_send_error(s, m, "Channel not specified");
      return 0;
   }
   if (!ast_strlen_zero(priority) && (sscanf(priority, "%d", &pi) != 1)) {
      astman_send_error(s, m, "Invalid priority\n");
      return 0;
   }
   if (!ast_strlen_zero(timeout) && (sscanf(timeout, "%d", &to) != 1)) {
      astman_send_error(s, m, "Invalid timeout\n");
      return 0;
   }
   strncpy(tmp, name, sizeof(tmp) - 1);
   tech = tmp;
   data = strchr(tmp, '/');
   if (!data) {
      astman_send_error(s, m, "Invalid channel\n");
      return 0;
   }
   *data = '\0';
   data++;
   if (ast_true(async))
   {
      struct fast_originate_helper *fast = malloc(sizeof(struct fast_originate_helper));
      if (!fast)
      {
         res = -1;
      }
      else
      {
         memset(fast, 0, sizeof(struct fast_originate_helper));
         strncpy(fast->tech, tech, sizeof(fast->tech) - 1);
            strncpy(fast->data, data, sizeof(fast->data) - 1);
         strncpy(fast->app, app, sizeof(fast->app) - 1);
         strncpy(fast->appdata, appdata, sizeof(fast->appdata) - 1);
         strncpy(fast->callerid, callerid, sizeof(fast->callerid) - 1);
         strncpy(fast->variable, variable, sizeof(fast->variable) - 1);
         strncpy(fast->account, account, sizeof(fast->account) - 1);
         strncpy(fast->context, context, sizeof(fast->context) - 1);
         strncpy(fast->exten, exten, sizeof(fast->exten) - 1);
         fast->timeout = to;
         fast->priority = pi;
         pthread_attr_init(&attr);
         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
         if (pthread_create(&th, &attr, fast_originate, fast))
         {
            res = -1;
         }
         else
         {
            res = 0;
         }
      }
   } else if (!ast_strlen_zero(app)) {
         res = ast_pbx_outgoing_app(tech, AST_FORMAT_SLINEAR, data, to, app, appdata, &reason, 0, !ast_strlen_zero(callerid) ? callerid : NULL, variable, account);
      } else {
      if (exten && context && pi)
            res = ast_pbx_outgoing_exten(tech, AST_FORMAT_SLINEAR, data, to, context, exten, pi, &reason, 0, !ast_strlen_zero(callerid) ? callerid : NULL, variable, account);
      else {
         astman_send_error(s, m, "Originate with 'Exten' requires 'Context' and 'Priority'");
         return 0;
      }
   }   
   if (!res)
      astman_send_ack(s, m, "Originate successfully queued");
   else
      astman_send_error(s, m, "Originate failed");
   return 0;
}

static int action_mailboxstatus(struct mansession *s, struct message *m)
{
   char *mailbox = astman_get_header(m, "Mailbox");
   char *id = astman_get_header(m,"ActionID");
   char idText[256] = "";
   if (!mailbox || ast_strlen_zero(mailbox)) {
      astman_send_error(s, m, "Mailbox not specified");
      return 0;
   }
        if (id && !ast_strlen_zero(id))
                snprintf(idText,256,"ActionID: %s\r\n",id);
   ast_cli(s->fd, "Response: Success\r\n"
               "%s"
               "Message: Mailbox Status\r\n"
               "Mailbox: %s\r\n"
               "Waiting: %d\r\n\r\n", idText, mailbox, ast_app_has_voicemail(mailbox));
   return 0;
}

static int action_mailboxcount(struct mansession *s, struct message *m)
{
   char *mailbox = astman_get_header(m, "Mailbox");
   char *id = astman_get_header(m,"ActionID");
   char idText[256] = "";
   int newmsgs = 0, oldmsgs = 0;
   if (!mailbox || ast_strlen_zero(mailbox)) {
      astman_send_error(s, m, "Mailbox not specified");
      return 0;
   }
   ast_app_messagecount(mailbox, &newmsgs, &oldmsgs);
        if (id && !ast_strlen_zero(id)) {
                snprintf(idText,256,"ActionID: %s\r\n",id);
        }
   ast_cli(s->fd, "Response: Success\r\n"
               "%s"
               "Message: Mailbox Message Count\r\n"
               "Mailbox: %s\r\n"
               "NewMessages: %d\r\n"
               "OldMessages: %d\r\n" 
               "\r\n",
                idText,mailbox, newmsgs, oldmsgs);
   return 0;
}

static int action_extensionstate(struct mansession *s, struct message *m)
{
   char *exten = astman_get_header(m, "Exten");
   char *context = astman_get_header(m, "Context");
   char *id = astman_get_header(m,"ActionID");
   char idText[256] = "";
   char hint[256] = "";
   int status;
   if (!exten || ast_strlen_zero(exten)) {
      astman_send_error(s, m, "Extension not specified");
      return 0;
   }
   if (!context || ast_strlen_zero(context))
      context = "default";
   status = ast_extension_state(NULL, context, exten);
   ast_get_hint(hint, sizeof(hint) - 1, NULL, context, exten);
        if (id && !ast_strlen_zero(id)) {
                snprintf(idText,256,"ActionID: %s\r\n",id);
        }
   ast_cli(s->fd, "Response: Success\r\n"
                    "%s"
               "Message: Extension Status\r\n"
               "Exten: %s\r\n"
               "Context: %s\r\n"
               "Hint: %s\r\n"
               "Status: %d\r\n\r\n",
               idText,exten, context, hint, status);
   return 0;
}

static int action_timeout(struct mansession *s, struct message *m)
{
   struct ast_channel *c = NULL;
   char *name = astman_get_header(m, "Channel");
   int timeout = atoi(astman_get_header(m, "Timeout"));
   if (ast_strlen_zero(name)) {
      astman_send_error(s, m, "No channel specified");
      return 0;
   }
   if (!timeout) {
      astman_send_error(s, m, "No timeout specified");
      return 0;
   }
   c = ast_channel_walk_locked(NULL);
   while(c) {
      if (!strcasecmp(c->name, name)) {
         break;
      }
      ast_mutex_unlock(&c->lock);
      c = ast_channel_walk_locked(c);
   }
   if (!c) {
      astman_send_error(s, m, "No such channel");
      return 0;
   }
   ast_channel_setwhentohangup(c, timeout);
   ast_mutex_unlock(&c->lock);
   astman_send_ack(s, m, "Timeout Set");
   return 0;
}

static int process_message(struct mansession *s, struct message *m)
{
   char action[80];
   struct manager_action *tmp = first_action;
   char *id = astman_get_header(m,"ActionID");
   char idText[256] = "";

   strncpy(action, astman_get_header(m, "Action"), sizeof(action));
   ast_log( LOG_DEBUG, "Manager received command '%s'\n", action );

   if (ast_strlen_zero(action)) {
      astman_send_error(s, m, "Missing action in request");
      return 0;
   }
        if (id && !ast_strlen_zero(id)) {
                snprintf(idText,256,"ActionID: %s\r\n",id);
        }
   if (!s->authenticated) {
      if (!strcasecmp(action, "Challenge")) {
         char *authtype;
         authtype = astman_get_header(m, "AuthType");
         if (!strcasecmp(authtype, "MD5")) {
            if (!s->challenge || ast_strlen_zero(s->challenge)) {
               ast_mutex_lock(&s->lock);
               snprintf(s->challenge, sizeof(s->challenge), "%d", rand());
               ast_mutex_unlock(&s->lock);
            }
            ast_cli(s->fd, "Response: Success\r\n"
                  "%s"
                  "Challenge: %s\r\n\r\n",
                  idText,s->challenge);
            return 0;
         } else {
            astman_send_error(s, m, "Must specify AuthType");
            return 0;
         }
      } else if (!strcasecmp(action, "Login")) {
         if (authenticate(s, m)) {
            sleep(1);
            astman_send_error(s, m, "Authentication failed");
            return -1;
         } else {
            s->authenticated = 1;
            if (option_verbose > 1) 
               ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged on from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
            ast_log(LOG_EVENT, "Manager '%s' logged on from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
            astman_send_ack(s, m, "Authentication accepted");
         }
      } else if (!strcasecmp(action, "Logoff")) {
         astman_send_ack(s, m, "See ya");
         return -1;
      } else
         astman_send_error(s, m, "Authentication Required");
   } else {
      while( tmp ) {       
         if (!strcasecmp(action, tmp->action)) {
            if ((s->writeperm & tmp->authority) == tmp->authority) {
               if (tmp->func(s, m))
                  return -1;
            } else {
               astman_send_error(s, m, "Permission denied");
            }
            return 0;
         }
         tmp = tmp->next;
      }
      astman_send_error(s, m, "Invalid/unknown command");
   }
   return 0;
}

static int get_input(struct mansession *s, char *output)
{
   /* output must have at least sizeof(s->inbuf) space */
   int res;
   int x;
   struct pollfd fds[1];
   for (x=1;x<s->inlen;x++) {
      if ((s->inbuf[x] == '\n') && (s->inbuf[x-1] == '\r')) {
         /* Copy output data up to and including \r\n */
         memcpy(output, s->inbuf, x + 1);
         /* Add trailing \0 */
         output[x+1] = '\0';
         /* Move remaining data back to the front */
         memmove(s->inbuf, s->inbuf + x + 1, s->inlen - x);
         s->inlen -= (x + 1);
         return 1;
      }
   } 
   if (s->inlen >= sizeof(s->inbuf) - 1) {
      ast_log(LOG_WARNING, "Dumping long line with no return from %s: %s\n", inet_ntoa(s->sin.sin_addr), s->inbuf);
      s->inlen = 0;
   }
   fds[0].fd = s->fd;
   fds[0].events = POLLIN;
   res = poll(fds, 1, -1);
   if (res < 0) {
      ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
   } else if (res > 0) {
      ast_mutex_lock(&s->lock);
      res = read(s->fd, s->inbuf + s->inlen, sizeof(s->inbuf) - 1 - s->inlen);
      ast_mutex_unlock(&s->lock);
      if (res < 1)
         return -1;
   }
   s->inlen += res;
   s->inbuf[s->inlen] = '\0';
   return 0;
}

static void *session_do(void *data)
{
   struct mansession *s = data;
   struct message m;
   int res;
   
   ast_mutex_lock(&s->lock);
   ast_cli(s->fd, "Asterisk Call Manager/1.0\r\n");
   ast_mutex_unlock(&s->lock);
   memset(&m, 0, sizeof(&m));
   for (;;) {
      res = get_input(s, m.headers[m.hdrcount]);
      if (res > 0) {
         /* Strip trailing \r\n */
         if (strlen(m.headers[m.hdrcount]) < 2)
            continue;
         m.headers[m.hdrcount][strlen(m.headers[m.hdrcount]) - 2] = '\0';
         if (ast_strlen_zero(m.headers[m.hdrcount])) {
            if (process_message(s, &m))
               break;
            memset(&m, 0, sizeof(&m));
         } else if (m.hdrcount < MAX_HEADERS - 1)
            m.hdrcount++;
      } else if (res < 0)
         break;
   }
   if (s->authenticated) {
      if (option_verbose > 1) 
         ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
      ast_log(LOG_EVENT, "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
   } else {
      if (option_verbose > 1)
         ast_verbose(VERBOSE_PREFIX_2 "Connect attempt from '%s' unable to authenticate\n", inet_ntoa(s->sin.sin_addr));
      ast_log(LOG_EVENT, "Failed attempt from %s\n", inet_ntoa(s->sin.sin_addr));
   }
   destroy_session(s);
   return NULL;
}

static void *accept_thread(void *ignore)
{
   int as;
   struct sockaddr_in sin;
   int sinlen;
   struct mansession *s;
   struct protoent *p;
   int arg = 1;
   int flags;
   pthread_attr_t attr;

   pthread_attr_init(&attr);
   pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

   for (;;) {
      sinlen = sizeof(sin);
      as = accept(asock, (struct sockaddr *)&sin, &sinlen);
      if (as < 0) {
         ast_log(LOG_NOTICE, "Accept returned -1: %s\n", strerror(errno));
         continue;
      }
      p = getprotobyname("tcp");
      if( p ) {
         if( setsockopt(as, p->p_proto, TCP_NODELAY, (char *)&arg, sizeof(arg) ) < 0 ) {
            ast_log(LOG_WARNING, "Failed to set manager tcp connection to TCP_NODELAY mode: %s\n", strerror(errno));
         }
      }
      s = malloc(sizeof(struct mansession));
      if (!s) {
         ast_log(LOG_WARNING, "Failed to allocate management session: %s\n", strerror(errno));
         continue;
      } 
      memset(s, 0, sizeof(struct mansession));
      memcpy(&s->sin, &sin, sizeof(sin));

      if(! block_sockets) {
         /* For safety, make sure socket is non-blocking */
         flags = fcntl(as, F_GETFL);
         fcntl(as, F_SETFL, flags | O_NONBLOCK);
      }
      ast_mutex_init(&s->lock);
      s->fd = as;
      s->send_events = 1;
      ast_mutex_lock(&sessionlock);
      s->next = sessions;
      sessions = s;
      ast_mutex_unlock(&sessionlock);
      if (pthread_create(&t, &attr, session_do, s))
         destroy_session(s);
   }
   pthread_attr_destroy(&attr);
   return NULL;
}

int manager_event(int category, char *event, char *fmt, ...)
{
   struct mansession *s;
   char tmp[4096];
   va_list ap;

   ast_mutex_lock(&sessionlock);
   s = sessions;
   while(s) {
      if (((s->readperm & category) == category) && s->send_events) {
         ast_mutex_lock(&s->lock);
         if (!s->blocking) {
            ast_cli(s->fd, "Event: %s\r\n", event);
            va_start(ap, fmt);
            vsnprintf(tmp, sizeof(tmp), fmt, ap);
            va_end(ap);
            ast_carefulwrite(s->fd,tmp,strlen(tmp),100);
            ast_cli(s->fd, "\r\n");
         }
         ast_mutex_unlock(&s->lock);
      }
      s = s->next;
   }
   ast_mutex_unlock(&sessionlock);
   return 0;
}

int ast_manager_unregister( char *action ) {
   struct manager_action *cur = first_action, *prev = first_action;

   ast_mutex_lock(&actionlock);
   while( cur ) {       
      if (!strcasecmp(action, cur->action)) {
         prev->next = cur->next;
         free(cur);
         if (option_verbose > 1) 
            ast_verbose(VERBOSE_PREFIX_2 "Manager unregistered action %s\n", action);
         ast_mutex_unlock(&actionlock);
         return 0;
      }
      prev = cur;
      cur = cur->next;
   }
   ast_mutex_unlock(&actionlock);
   return 0;
}

static int manager_state_cb(char *context, char *exten, int state, void *data)
{
   /* Notify managers of change */
   manager_event(EVENT_FLAG_CALL, "ExtensionStatus", "Exten: %s\r\nContext: %s\r\nStatus: %d\r\n", exten, context, state);
   return 0;
}

static int ast_manager_register_struct(struct manager_action *act)
{
   struct manager_action *cur = first_action, *prev = NULL;
   int ret;

   ast_mutex_lock(&actionlock);
   while(cur) { /* Walk the list of actions */
      ret = strcasecmp(cur->action, act->action);
      if (ret == 0) {
         ast_log(LOG_WARNING, "Manager: Action '%s' already registered\n", act->action);
         ast_mutex_unlock(&actionlock);
         return -1;
      } else if (ret > 0) {
         /* Insert these alphabetically */
         if (prev) {
            act->next = prev->next;
            prev->next = act;
         } else {
            act->next = first_action;
            first_action = act;
         }
         break;
      }
      prev = cur; 
      cur = cur->next;
   }
   
   if (!cur) {
      if (prev)
         prev->next = act;
      else
         first_action = act;
      act->next = NULL;
   }

   if (option_verbose > 1) 
      ast_verbose(VERBOSE_PREFIX_2 "Manager registered action %s\n", act->action);
   ast_mutex_unlock(&actionlock);
   return 0;
}

int ast_manager_register2(char *action, int auth, int (*func)(struct mansession *s, struct message *m), char *synopsis, char *description)
{
   struct manager_action *cur;

   cur = malloc(sizeof(struct manager_action));
   if (!cur) {
      ast_log(LOG_WARNING, "Manager: out of memory trying to register action\n");
      ast_mutex_unlock(&actionlock);
      return -1;
   }
   cur->action = action;
   cur->authority = auth;
   cur->func = func;
   cur->synopsis = synopsis;
   cur->description = description;
   cur->next = NULL;

   ast_manager_register_struct(cur);

   return 0;
}

static int registered = 0;

int init_manager(void)
{
   struct ast_config *cfg;
   char *val;
   int oldportno = portno;
   static struct sockaddr_in ba;
   int x = 1;
   if (!registered) {
      /* Register default actions */
      ast_manager_register2("Ping", 0, action_ping, "Ping", mandescr_ping);
      ast_manager_register( "Events", 0, action_events, "Contol Event Flow" );
      ast_manager_register( "Logoff", 0, action_logoff, "Logoff Manager" );
      ast_manager_register( "Hangup", EVENT_FLAG_CALL, action_hangup, "Hangup Channel" );
      ast_manager_register( "Status", EVENT_FLAG_CALL, action_status, "Status" );
      ast_manager_register( "Setvar", EVENT_FLAG_CALL, action_setvar, "Set Channel Variable" );
      ast_manager_register( "Getvar", EVENT_FLAG_CALL, action_getvar, "Gets a Channel Variable" );
      ast_manager_register( "Redirect", EVENT_FLAG_CALL, action_redirect, "Redirect" );
      ast_manager_register2("Originate", EVENT_FLAG_CALL, action_originate, "Originate Call", mandescr_originate);
      ast_manager_register( "MailboxStatus", EVENT_FLAG_CALL, action_mailboxstatus, "Check Mailbox" );
      ast_manager_register( "Command", EVENT_FLAG_COMMAND, action_command, "Execute Command" );
      ast_manager_register( "ExtensionState", EVENT_FLAG_CALL, action_extensionstate, "Check Extension Status" );
      ast_manager_register( "AbsoluteTimeout", EVENT_FLAG_CALL, action_timeout, "Set Absolute Timeout" );
      ast_manager_register( "MailboxCount", EVENT_FLAG_CALL, action_mailboxcount, "Check Mailbox Message Count" );
      ast_manager_register2("ListCommands", 0, action_listcommands, "List available manager commands", mandescr_listcommands);

      ast_cli_register(&show_mancmd_cli);
      ast_cli_register(&show_mancmds_cli);
      ast_cli_register(&show_manconn_cli);
      ast_extension_state_add(NULL, NULL, manager_state_cb, NULL);
      registered = 1;
   }
   portno = DEFAULT_MANAGER_PORT;
   cfg = ast_load("manager.conf");
   if (!cfg) {
      ast_log(LOG_NOTICE, "Unable to open management configuration manager.conf.  Call management disabled.\n");
      return 0;
   }
   memset(&ba, 0, sizeof(ba));
   val = ast_variable_retrieve(cfg, "general", "enabled");
   if (val)
      enabled = ast_true(val);

   val = ast_variable_retrieve(cfg, "general", "block-sockets");
   if(val)
      block_sockets = ast_true(val);

   if ((val = ast_variable_retrieve(cfg, "general", "port"))) {
      if (sscanf(val, "%d", &portno) != 1) {
         ast_log(LOG_WARNING, "Invalid port number '%s'\n", val);
         portno = DEFAULT_MANAGER_PORT;
      }
   } else if ((val = ast_variable_retrieve(cfg, "general", "portno"))) {
      if (sscanf(val, "%d", &portno) != 1) {
         ast_log(LOG_WARNING, "Invalid port number '%s'\n", val);
         portno = DEFAULT_MANAGER_PORT;
      }
      ast_log(LOG_NOTICE, "Use of portno in manager.conf deprecated.  Please use 'port=%s' instead.\n", val);
   }
   
   ba.sin_family = AF_INET;
   ba.sin_port = htons(portno);
   memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
   
   if ((val = ast_variable_retrieve(cfg, "general", "bindaddr"))) {
      if (!inet_aton(val, &ba.sin_addr)) { 
         ast_log(LOG_WARNING, "Invalid address '%s' specified, using 0.0.0.0\n", val);
         memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
      }
   }
   
   if ((asock > -1) && ((portno != oldportno) || !enabled)) {
#if 0
      /* Can't be done yet */
      close(asock);
      asock = -1;
#else
      ast_log(LOG_WARNING, "Unable to change management port / enabled\n");
#endif
   }
   ast_destroy(cfg);
   
   /* If not enabled, do nothing */
   if (!enabled) {
      return 0;
   }
   if (asock < 0) {
      asock = socket(AF_INET, SOCK_STREAM, 0);
      if (asock < 0) {
         ast_log(LOG_WARNING, "Unable to create socket: %s\n", strerror(errno));
         return -1;
      }
      setsockopt(asock, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
      if (bind(asock, (struct sockaddr *)&ba, sizeof(ba))) {
         ast_log(LOG_WARNING, "Unable to bind socket: %s\n", strerror(errno));
         close(asock);
         asock = -1;
         return -1;
      }
      if (listen(asock, 2)) {
         ast_log(LOG_WARNING, "Unable to listen on socket: %s\n", strerror(errno));
         close(asock);
         asock = -1;
         return -1;
      }
      if (option_verbose)
         ast_verbose("Asterisk Management interface listening on port %d\n", portno);
      pthread_create(&t, NULL, accept_thread, NULL);
   }
   return 0;
}

int reload_manager(void)
{
   manager_event(EVENT_FLAG_SYSTEM, "Reload", "Message: Reload Requested\r\n");
   return init_manager();
}

---