Wed Oct 28 15:47:54 2009

Asterisk developer's documentation

---

manager.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 The Asterisk Management Interface - AMI
 *
 * Channel Management and more
 * 
 * \ref amiconf
 */

/*! \addtogroup Group_AMI AMI functions 
*/
/*! @{ 
 Doxygen group */

#include <stdio.h>
#include <stdlib.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 "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision: 211526 $")

#include "asterisk/channel.h"
#include "asterisk/file.h"
#include "asterisk/manager.h"
#include "asterisk/config.h"
#include "asterisk/callerid.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[AST_MAX_MANHEADER_LEN];
   char data[AST_MAX_MANHEADER_LEN];
   int timeout;
   char app[AST_MAX_APP];
   char appdata[AST_MAX_MANHEADER_LEN];
   char cid_name[AST_MAX_MANHEADER_LEN];
   char cid_num[AST_MAX_MANHEADER_LEN];
   char context[AST_MAX_CONTEXT];
   char exten[AST_MAX_EXTENSION];
   char idtext[AST_MAX_MANHEADER_LEN];
   char account[AST_MAX_ACCOUNT_CODE];
   int priority;
   struct ast_variable *vars;
};

static int enabled = 0;
static int portno = DEFAULT_MANAGER_PORT;
static int asock = -1;
static int displayconnects = 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" },
   { 0, "none" },
};

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

/*! If you are calling ast_carefulwrite, it is assumed that you are calling
   it on a file descriptor that _DOES_ have NONBLOCK set.  This way,
   there is only one system call made to do a write, unless we actually
   have a need to wait.  This way, we get better performance. */
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;
      res = 0;
      if (len) {
         fds[0].fd = fd;
         fds[0].events = POLLOUT;
         /* Wait until writable again */
         res = poll(fds, 1, timeoutms);
         if (res < 1)
            return -1;
      }
   }
   return res;
}

/*! authority_to_str: Convert authority code to string with serveral options */
static char *authority_to_str(int authority, char *res, int reslen)
{
   int running_total = 0, i;
   memset(res, 0, reslen);
   for (i=0; i<sizeof(perms) / sizeof(perms[0]) - 1; i++) {
      if (authority & perms[i].num) {
         if (*res) {
            strncat(res, ",", (reslen > running_total) ? reslen - running_total : 0);
            running_total++;
         }
         strncat(res, perms[i].label, (reslen > running_total) ? reslen - running_total : 0);
         running_total += strlen(perms[i].label);
      }
   }
   if (ast_strlen_zero(res)) {
      ast_copy_string(res, "<none>", reslen);
   }
   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;
   char authority[80];
   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\nPrivilege: %s\n%s\n", cur->action, cur->synopsis, authority_to_str(cur->authority, authority, sizeof(authority) -1), cur->description ? cur->description : "");
         }
      }
      cur = cur->next;
   }

   ast_mutex_unlock(&actionlock);
   return RESULT_SUCCESS;
}

/*! \brief  handle_showmancmds: CLI command */
/* Should change to "manager show commands" */
static int handle_showmancmds(int fd, int argc, char *argv[])
{
   struct manager_action *cur = first_action;
   char authority[80];
   char *format = "  %-15.15s  %-15.15s  %-55.55s\n";

   ast_mutex_lock(&actionlock);
   ast_cli(fd, format, "Action", "Privilege", "Synopsis");
   ast_cli(fd, format, "------", "---------", "--------");
   while (cur) { /* Walk the list of actions */
      ast_cli(fd, format, cur->action, authority_to_str(cur->authority, authority, sizeof(authority) -1), cur->synopsis);
      cur = cur->next;
   }

   ast_mutex_unlock(&actionlock);
   return RESULT_SUCCESS;
}

/*! \brief  handle_showmanconn: CLI command show manager connected */
/* Should change to "manager show connected" */
static int handle_showmanconn(int fd, int argc, char *argv[])
{
   struct mansession *s;
   char iabuf[INET_ADDRSTRLEN];
   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, ast_inet_ntoa(iabuf, sizeof(iabuf), 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 Asterisk manager interface command.\n";

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

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

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

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

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

static void free_session(struct mansession *s)
{
   struct eventqent *eqe;
   if (s->fd > -1)
      close(s->fd);
   ast_mutex_destroy(&s->__lock);
   while(s->eventq) {
      eqe = s->eventq;
      s->eventq = s->eventq->next;
      free(eqe);
   }
   free(s);
}

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;
      free_session(s);
   } else
      ast_log(LOG_WARNING, "Trying to delete nonexistent 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 "";
}

struct ast_variable *astman_get_variables(struct message *m)
{
   int varlen, x, y;
   struct ast_variable *head = NULL, *cur;
   char *var, *val;
   unsigned int var_count;
        char *vars[32];
   
   varlen = strlen("Variable: ");   

   for (x = 0; x < m->hdrcount; x++) {
      if (strncasecmp("Variable: ", m->headers[x], varlen))
         continue;

      if (!(var = ast_strdupa(m->headers[x] + varlen)))
         return head;

      if ((var_count = ast_app_separate_args(var, '|', vars, sizeof(vars) / sizeof(vars[0])))) {
         for (y = 0; y < var_count; y++) {
            if (!vars[y])
               continue;
            var = val = ast_strdupa(vars[y]);
            strsep(&val, "=");
            if (!val || ast_strlen_zero(var))
               continue;
            cur = ast_variable_new(var, val);
            if (head) {
               cur->next = head;
               head = cur;
            } else
               head = cur;
         }
      }
   }

   return head;
}

/*! NOTE:
   Callers of astman_send_error(), astman_send_response() or astman_send_ack() must EITHER
   hold the session lock _or_ be running in an action callback (in which case s->busy will
   be non-zero). In either of these cases, there is no need to lock-protect the session's
   fd, since no other output will be sent (events will be queued), and no input will
   be read until either the current action finishes or get_input() obtains the session
   lock.
 */
void astman_send_error(struct mansession *s, struct message *m, char *error)
{
   char *id = astman_get_header(m,"ActionID");

   ast_cli(s->fd, "Response: Error\r\n");
   if (!ast_strlen_zero(id))
      ast_cli(s->fd, "ActionID: %s\r\n",id);
   ast_cli(s->fd, "Message: %s\r\n\r\n", error);
}

void astman_send_response(struct mansession *s, struct message *m, char *resp, char *msg)
{
   char *id = astman_get_header(m,"ActionID");

   ast_cli(s->fd, "Response: %s\r\n", resp);
   if (!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");
}

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

/*! Tells you if smallstr exists inside bigstr
   which is delim by delim and uses no buf or stringsep
   ast_instring("this|that|more","this",',') == 1;

   feel free to move this to app.c -anthm */
static int ast_instring(char *bigstr, char *smallstr, char delim) 
{
   char *val = bigstr, *next;

   do {
      if ((next = strchr(val, delim))) {
         if (!strncmp(val, smallstr, (next - val)))
            return 1;
         else
            continue;
      } else
         return !strcmp(smallstr, val);

   } while (*(val = (next + 1)));

   return 0;
}

static int get_perm(char *instr)
{
   int x = 0, ret = 0;

   if (!instr)
      return 0;

   for (x=0; x<sizeof(perms) / sizeof(perms[0]); x++)
      if (ast_instring(instr, perms[x].label, ','))
         ret |= perms[x].num;
   
   return ret;
}

static int ast_is_number(char *string) 
{
   int ret = 1, x = 0;

   if (!string)
      return 0;

   for (x=0; x < strlen(string); x++) {
      if (!(string[x] >= 48 && string[x] <= 57)) {
         ret = 0;
         break;
      }
   }
   
   return ret ? atoi(string) : 0;
}

static int ast_strings_to_mask(char *string) 
{
   int x, ret = -1;
   
   x = ast_is_number(string);

   if (x) {
      ret = x;
   } else if (ast_strlen_zero(string)) {
      ret = -1;
   } else if (ast_false(string)) {
      ret = 0;
   } else if (ast_true(string)) {
      ret = 0;
      for (x=0; x<sizeof(perms) / sizeof(perms[0]); x++)
         ret |= perms[x].num;    
   } else {
      ret = 0;
      for (x=0; x<sizeof(perms) / sizeof(perms[0]); x++) {
         if (ast_instring(string, perms[x].label, ',')) 
            ret |= perms[x].num;    
      }
   }

   return ret;
}

/*! 
   Rather than braindead on,off this now can also accept a specific int mask value 
   or a ',' delim list of mask strings (the same as manager.conf) -anthm
*/

static int set_eventmask(struct mansession *s, char *eventmask)
{
   int maskint = ast_strings_to_mask(eventmask);

   ast_mutex_lock(&s->__lock);
   if (maskint >= 0) 
      s->send_events = maskint;
   ast_mutex_unlock(&s->__lock);
   
   return maskint;
}

static int authenticate(struct mansession *s, struct message *m)
{
   struct ast_config *cfg;
   char iabuf[INET_ADDRSTRLEN];
   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_config_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);
               } else if (!strcasecmp(v->name, "writetimeout")) {
                  int val = atoi(v->value);

                  if (val < 100)
                     ast_log(LOG_WARNING, "Invalid writetimeout value '%s' at line %d\n", v->value, v->lineno);
                  else
                     s->writetimeout = val;
               }
                     
               v = v->next;
            }
            if (ha && !ast_apply_ha(ha, &(s->sin))) {
               ast_log(LOG_NOTICE, "%s failed to pass IP ACL as '%s'\n", ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr), user);
               ast_free_ha(ha);
               ast_config_destroy(cfg);
               return -1;
            } else if (ha)
               ast_free_ha(ha);
            if (!strcasecmp(authtype, "MD5")) {
               if (!ast_strlen_zero(key) && 
                   !ast_strlen_zero(s->challenge) && !ast_strlen_zero(password)) {
                  int x;
                  int len=0;
                  char md5key[256] = "";
                  struct MD5Context md5;
                  unsigned char digest[16];
                  MD5Init(&md5);
                  MD5Update(&md5, (unsigned char *) s->challenge, strlen(s->challenge));
                  MD5Update(&md5, (unsigned char *) 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_config_destroy(cfg);
                     return -1;
                  }
               }
            } else if (password && !strcasecmp(password, pass)) {
               break;
            } else {
               ast_log(LOG_NOTICE, "%s failed to authenticate as '%s'\n", ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr), user);
               ast_config_destroy(cfg);
               return -1;
            }  
         }
      }
      cat = ast_category_browse(cfg, cat);
   }
   if (cat) {
      ast_copy_string(s->username, cat, sizeof(s->username));
      s->readperm = get_perm(ast_variable_retrieve(cfg, cat, "read"));
      s->writeperm = get_perm(ast_variable_retrieve(cfg, cat, "write"));
      ast_config_destroy(cfg);
      if (events)
         set_eventmask(s, events);
      return 0;
   }
   ast_log(LOG_NOTICE, "%s tried to authenticate with nonexistent user '%s'\n", ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr), user);
   ast_config_destroy(cfg);
   return -1;
}

/*! \brief PING: Manager PING */
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 temp[BUFSIZ];
   char *id = astman_get_header(m,"ActionID");

   if (!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 (Priv: %s)\r\n", cur->action, cur->synopsis, authority_to_str(cur->authority, temp, sizeof(temp)) );
      cur = cur->next;
   }
   ast_mutex_unlock(&actionlock);
   ast_cli(s->fd, "\r\n");

   return 0;
}

static char mandescr_events[] = 
"Description: Enable/Disable sending of events to this manager\n"
"  client.\n"
"Variables:\n"
"  EventMask: 'on' if all events should be sent,\n"
"     'off' if no events should be sent,\n"
"     'system,call,log' to select which flags events should have to be sent.\n";

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);

   return 0;
}

static char mandescr_logoff[] = 
"Description: Logoff this manager session\n"
"Variables: NONE\n";

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

static char mandescr_hangup[] = 
"Description: Hangup a channel\n"
"Variables: \n"
"  Channel: The channel name to be hungup\n";

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_get_channel_by_name_locked(name);
   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 char mandescr_setvar[] = 
"Description: Set a global or local channel variable.\n"
"Variables: (Names marked with * are required)\n"
"  Channel: Channel to set variable for\n"
"  *Variable: Variable name\n"
"  *Value: Value\n";

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 (ast_strlen_zero(varname)) {
      astman_send_error(s, m, "No variable specified");
      return 0;
   }
   
   if (!ast_strlen_zero(name)) {
      c = ast_get_channel_by_name_locked(name);
      if (!c) {
         astman_send_error(s, m, "No such channel");
         return 0;
      }
   }
   
   pbx_builtin_setvar_helper(c, varname, varval ? varval : "");
     
   if (c)
      ast_mutex_unlock(&c->lock);

   astman_send_ack(s, m, "Variable Set"); 

   return 0;
}

static char mandescr_getvar[] = 
"Description: Get the value of a global or local channel variable.\n"
"Variables: (Names marked with * are required)\n"
"  Channel: Channel to read variable from\n"
"  *Variable: Variable name\n"
"  ActionID: Optional Action id for message matching.\n";

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 *id = astman_get_header(m,"ActionID");
   char *varval;
   char *varval2=NULL;

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

   if (strlen(name)) {
      c = ast_get_channel_by_name_locked(name);
      if (!c) {
         astman_send_error(s, m, "No such channel");
         return 0;
      }
   }
   
   varval=pbx_builtin_getvar_helper(c,varname);
   if (varval)
      varval2 = ast_strdupa(varval);
   if (!varval2)
      varval2 = "";
   if (c)
      ast_mutex_unlock(&c->lock);
   ast_cli(s->fd, "Response: Success\r\n"
      "Variable: %s\r\nValue: %s\r\n" ,varname,varval2);
   if (!ast_strlen_zero(id))
      ast_cli(s->fd, "ActionID: %s\r\n",id);
   ast_cli(s->fd, "\r\n");

   return 0;
}


/*! \brief  action_status: Manager "status" command to show channels */
/* Needs documentation... */
static int action_status(struct mansession *s, struct message *m)
{
   char *id = astman_get_header(m,"ActionID");
      char *name = astman_get_header(m,"Channel");
   char idText[256] = "";
   struct ast_channel *c;
   char bridge[256];
   struct timeval now = ast_tvnow();
   long elapsed_seconds=0;
   int all = ast_strlen_zero(name); /* set if we want all channels */

        if (!ast_strlen_zero(id))
                snprintf(idText,256,"ActionID: %s\r\n",id);
   if (all)
      c = ast_channel_walk_locked(NULL);
   else {
      c = ast_get_channel_by_name_locked(name);
      if (!c) {
         astman_send_error(s, m, "No such channel");
         return 0;
      }
   }
   astman_send_ack(s, m, "Channel status will follow");
   /* if we look by name, we break after the first iteration */
   while(c) {
      if (c->_bridge)
         snprintf(bridge, sizeof(bridge), "Link: %s\r\n", c->_bridge->name);
      else
         bridge[0] = '\0';
      if (c->pbx) {
         if (c->cdr) {
            elapsed_seconds = now.tv_sec - c->cdr->start.tv_sec;
         }
         ast_cli(s->fd,
         "Event: Status\r\n"
         "Privilege: Call\r\n"
         "Channel: %s\r\n"
         "CallerID: %s\r\n"
         "CallerIDName: %s\r\n"
         "Account: %s\r\n"
         "State: %s\r\n"
         "Context: %s\r\n"
         "Extension: %s\r\n"
         "Priority: %d\r\n"
         "Seconds: %ld\r\n"
         "%s"
         "Uniqueid: %s\r\n"
         "%s"
         "\r\n",
         c->name, 
         c->cid.cid_num ? c->cid.cid_num : "<unknown>", 
         c->cid.cid_name ? c->cid.cid_name : "<unknown>", 
         c->accountcode,
         ast_state2str(c->_state), c->context,
         c->exten, c->priority, (long)elapsed_seconds, bridge, c->uniqueid, idText);
      } else {
         ast_cli(s->fd,
         "Event: Status\r\n"
         "Privilege: Call\r\n"
         "Channel: %s\r\n"
         "CallerID: %s\r\n"
         "CallerIDName: %s\r\n"
         "Account: %s\r\n"
         "State: %s\r\n"
         "%s"
         "Uniqueid: %s\r\n"
         "%s"
         "\r\n",
         c->name, 
         c->cid.cid_num ? c->cid.cid_num : "<unknown>", 
         c->cid.cid_name ? c->cid.cid_name : "<unknown>", 
         c->accountcode,
         ast_state2str(c->_state), bridge, c->uniqueid, idText);
      }
      ast_mutex_unlock(&c->lock);
      if (!all)
         break;
      c = ast_channel_walk_locked(c);
   }
   ast_cli(s->fd,
   "Event: StatusComplete\r\n"
   "%s"
   "\r\n",idText);
   return 0;
}

static char mandescr_redirect[] = 
"Description: Redirect (transfer) a call.\n"
"Variables: (Names marked with * are required)\n"
"  *Channel: Channel to redirect\n"
"  ExtraChannel: Second call leg to transfer (optional)\n"
"  *Exten: Extension to transfer to\n"
"  *Context: Context to transfer to\n"
"  *Priority: Priority to transfer to\n"
"  ActionID: Optional Action id for message matching.\n";

/*! \brief  action_redirect: The redirect manager command */
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 (ast_strlen_zero(name)) {
      astman_send_error(s, m, "Channel not specified");
      return 0;
   }
   if (!ast_strlen_zero(priority) && (sscanf(priority, "%30d", &pi) != 1)) {
      astman_send_error(s, m, "Invalid priority\n");
      return 0;
   }
   chan = ast_get_channel_by_name_locked(name);
   if (!chan) {
      char buf[BUFSIZ];
      snprintf(buf, sizeof(buf), "Channel does not exist: %s", name);
      astman_send_error(s, m, buf);
      return 0;
   }
   if (ast_check_hangup(chan)) {
      astman_send_error(s, m, "Redirect failed, channel hung up.\n");
      ast_mutex_unlock(&chan->lock);
      return 0;
   }
   if (!ast_strlen_zero(name2))
      chan2 = ast_get_channel_by_name_locked(name2);
   if (chan2 && ast_check_hangup(chan2)) {
      astman_send_error(s, m, "Redirect failed, extra channel hung up.\n");
      ast_mutex_unlock(&chan->lock);
      ast_mutex_unlock(&chan2->lock);
      return 0;
   }
   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 char mandescr_command[] = 
"Description: Run a CLI command.\n"
"Variables: (Names marked with * are required)\n"
"  *Command: Asterisk CLI command to run\n"
"  ActionID: Optional Action id for message matching.\n";

/*! \brief  action_command: Manager command "command" - execute CLI command */
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_cli(s->fd, "Response: Follows\r\nPrivilege: Command\r\n");
   if (!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");
   return 0;
}

static void *fast_originate(void *data)
{
   struct fast_originate_helper *in = data;
   int res;
   int reason = 0;
   struct ast_channel *chan = NULL;

   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->cid_num) ? in->cid_num : NULL, 
         !ast_strlen_zero(in->cid_name) ? in->cid_name : NULL,
         in->vars, in->account, &chan);
   } 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->cid_num) ? in->cid_num : NULL, 
         !ast_strlen_zero(in->cid_name) ? in->cid_name : NULL,
         in->vars, in->account, &chan);
   }   
   if (!res)
      manager_event(EVENT_FLAG_CALL,
         "OriginateSuccess",
         "%s"
         "Channel: %s/%s\r\n"
         "Context: %s\r\n"
         "Exten: %s\r\n"
         "Reason: %d\r\n"
         "Uniqueid: %s\r\n",
         in->idtext, in->tech, in->data, in->context, in->exten, reason, chan ? chan->uniqueid : "<null>");
   else
      manager_event(EVENT_FLAG_CALL,
         "OriginateFailure",
         "%s"
         "Channel: %s/%s\r\n"
         "Context: %s\r\n"
         "Exten: %s\r\n"
         "Reason: %d\r\n"
         "Uniqueid: %s\r\n",
         in->idtext, in->tech, in->data, in->context, in->exten, reason, chan ? chan->uniqueid : "<null>");

   /* Locked by ast_pbx_outgoing_exten or ast_pbx_outgoing_app */
   if (chan)
      ast_mutex_unlock(&chan->lock);
   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, multiple Variable: headers are allowed\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 *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 *id = astman_get_header(m, "ActionID");
   struct ast_variable *vars = astman_get_variables(m);
   char *tech, *data;
   char *l=NULL, *n=NULL;
   int pi = 0;
   int res;
   int to = 30000;
   int reason = 0;
   char tmp[256];
   char tmp2[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, "%30d", &pi) != 1)) {
      astman_send_error(s, m, "Invalid priority\n");
      return 0;
   }
   if (!ast_strlen_zero(timeout) && (sscanf(timeout, "%30d", &to) != 1)) {
      astman_send_error(s, m, "Invalid timeout\n");
      return 0;
   }
   ast_copy_string(tmp, name, sizeof(tmp));
   tech = tmp;
   data = strchr(tmp, '/');
   if (!data) {
      astman_send_error(s, m, "Invalid channel\n");
      return 0;
   }
   *data = '\0';
   data++;
   ast_copy_string(tmp2, callerid, sizeof(tmp2));
   ast_callerid_parse(tmp2, &n, &l);
   if (n) {
      if (ast_strlen_zero(n))
         n = NULL;
   }
   if (l) {
      ast_shrink_phone_number(l);
      if (ast_strlen_zero(l))
         l = NULL;
   }
   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));
         if (!ast_strlen_zero(id))
            snprintf(fast->idtext, sizeof(fast->idtext), "ActionID: %s\r\n", id);
         ast_copy_string(fast->tech, tech, sizeof(fast->tech));
            ast_copy_string(fast->data, data, sizeof(fast->data));
         ast_copy_string(fast->app, app, sizeof(fast->app));
         ast_copy_string(fast->appdata, appdata, sizeof(fast->appdata));
         if (l)
            ast_copy_string(fast->cid_num, l, sizeof(fast->cid_num));
         if (n)
            ast_copy_string(fast->cid_name, n, sizeof(fast->cid_name));
         fast->vars = vars;   
         ast_copy_string(fast->context, context, sizeof(fast->context));
         ast_copy_string(fast->exten, exten, sizeof(fast->exten));
         ast_copy_string(fast->account, account, sizeof(fast->account));
         fast->timeout = to;
         fast->priority = pi;
         pthread_attr_init(&attr);
         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
         if (ast_pthread_create(&th, &attr, fast_originate, fast)) {
            res = -1;
         } else {
            res = 0;
         }
         pthread_attr_destroy(&attr);
      }
   } else if (!ast_strlen_zero(app)) {
         res = ast_pbx_outgoing_app(tech, AST_FORMAT_SLINEAR, data, to, app, appdata, &reason, 1, l, n, vars, account, NULL);
      } else {
      if (exten && context && pi)
            res = ast_pbx_outgoing_exten(tech, AST_FORMAT_SLINEAR, data, to, context, exten, pi, &reason, 1, l, n, vars, account, NULL);
      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;
}

/*!   \brief Help text for manager command mailboxstatus
 */
static char mandescr_mailboxstatus[] = 
"Description: Checks a voicemail account for status.\n"
"Variables: (Names marked with * are required)\n"
"  *Mailbox: Full mailbox ID <mailbox>@<vm-context>\n"
"  ActionID: Optional ActionID for message matching.\n"
"Returns number of messages.\n"
"  Message: Mailbox Status\n"
"  Mailbox: <mailboxid>\n"
"  Waiting: <count>\n"
"\n";

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] = "";
   int ret;
   if (ast_strlen_zero(mailbox)) {
      astman_send_error(s, m, "Mailbox not specified");
      return 0;
   }
        if (!ast_strlen_zero(id))
                snprintf(idText,256,"ActionID: %s\r\n",id);
   ret = ast_app_has_voicemail(mailbox, NULL);
   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, ret);
   return 0;
}

static char mandescr_mailboxcount[] = 
"Description: Checks a voicemail account for new messages.\n"
"Variables: (Names marked with * are required)\n"
"  *Mailbox: Full mailbox ID <mailbox>@<vm-context>\n"
"  ActionID: Optional ActionID for message matching.\n"
"Returns number of new and old messages.\n"
"  Message: Mailbox Message Count\n"
"  Mailbox: <mailboxid>\n"
"  NewMessages: <count>\n"
"  OldMessages: <count>\n"
"\n";
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 (ast_strlen_zero(mailbox)) {
      astman_send_error(s, m, "Mailbox not specified");
      return 0;
   }
   ast_app_messagecount(mailbox, &newmsgs, &oldmsgs);
   if (!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 char mandescr_extensionstate[] = 
"Description: Report the extension state for given extension.\n"
"  If the extension has a hint, will use devicestate to check\n"
"  the status of the device connected to the extension.\n"
"Variables: (Names marked with * are required)\n"
"  *Exten: Extension to check state on\n"
"  *Context: Context for extension\n"
"  ActionId: Optional ID for this transaction\n"
"Will return an \"Extension Status\" message.\n"
"The response will include the hint for the extension and the status.\n";

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 (ast_strlen_zero(exten)) {
      astman_send_error(s, m, "Extension not specified");
      return 0;
   }
   if (ast_strlen_zero(context))
      context = "default";
   status = ast_extension_state(NULL, context, exten);
   ast_get_hint(hint, sizeof(hint) - 1, NULL, 0, NULL, context, exten);
        if (!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 char mandescr_timeout[] = 
"Description: Hangup a channel after a certain time.\n"
"Variables: (Names marked with * are required)\n"
"  *Channel: Channel name to hangup\n"
"  *Timeout: Maximum duration of the call (sec)\n"
"Acknowledges set time with 'Timeout Set' message\n";

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_get_channel_by_name_locked(name);
   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] = "";
   char iabuf[INET_ADDRSTRLEN];

   ast_copy_string(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 (!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 (ast_strlen_zero(s->challenge))
               snprintf(s->challenge, sizeof(s->challenge), "%d", rand());
            ast_mutex_lock(&s->__lock);
            ast_cli(s->fd, "Response: Success\r\n"
                  "%s"
                  "Challenge: %s\r\n\r\n",
                  idText,s->challenge);
            ast_mutex_unlock(&s->__lock);
            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) {
               if ( displayconnects ) {
                  ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged on from %s\n", s->username, ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr));
               }
            }
            ast_log(LOG_EVENT, "Manager '%s' logged on from %s\n", s->username, ast_inet_ntoa(iabuf, sizeof(iabuf), 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 {
      int ret=0;
      struct eventqent *eqe;
      ast_mutex_lock(&s->__lock);
      s->busy = 1;
      ast_mutex_unlock(&s->__lock);
      while( tmp ) {       
         if (!strcasecmp(action, tmp->action)) {
            if ((s->writeperm & tmp->authority) == tmp->authority) {
               if (tmp->func(s, m))
                  ret = -1;
            } else {
               astman_send_error(s, m, "Permission denied");
            }
            break;
         }
         tmp = tmp->next;
      }
      if (!tmp)
         astman_send_error(s, m, "Invalid/unknown command");
      ast_mutex_lock(&s->__lock);
      s->busy = 0;
      while(s->eventq) {
         if (ast_carefulwrite(s->fd, s->eventq->eventdata, strlen(s->eventq->eventdata), s->writetimeout) < 0) {
            ret = -1;
            break;
         }
         eqe = s->eventq;
         s->eventq = s->eventq->next;
         free(eqe);
      }
      ast_mutex_unlock(&s->__lock);
      return ret;
   }
   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];
   char iabuf[INET_ADDRSTRLEN];
   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", ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr), s->inbuf);
      s->inlen = 0;
   }
   fds[0].fd = s->fd;
   fds[0].events = POLLIN;
   do {
      res = poll(fds, 1, -1);
      if (res < 0) {
         if (errno == EINTR) {
            if (s->dead)
               return -1;
            continue;
         }
         ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
         return -1;
      } 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;
         break;
      }
   } while(1);
   s->inlen += res;
   s->inbuf[s->inlen] = '\0';
   return 0;
}

static void *session_do(void *data)
{
   struct mansession *s = data;
   struct message m;
   char iabuf[INET_ADDRSTRLEN];
   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 < AST_MAX_MANHEADERS - 1)
            m.hdrcount++;
      } else if (res < 0)
         break;
   }
   if (s->authenticated) {
      if (option_verbose > 1) {
         if (displayconnects) 
            ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged off from %s\n", s->username, ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr));    
      }
      ast_log(LOG_EVENT, "Manager '%s' logged off from %s\n", s->username, ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr));
   } else {
      if (option_verbose > 1) {
         if ( displayconnects )
            ast_verbose(VERBOSE_PREFIX_2 "Connect attempt from '%s' unable to authenticate\n", ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr));
      }
      ast_log(LOG_EVENT, "Failed attempt from %s\n", ast_inet_ntoa(iabuf, sizeof(iabuf), s->sin.sin_addr));
   }
   destroy_session(s);
   return NULL;
}

static void *accept_thread(void *ignore)
{
   int as;
   struct sockaddr_in sin;
   socklen_t 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));
      s->writetimeout = 100;

      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 (ast_pthread_create(&s->t, &attr, session_do, s))
         destroy_session(s);
   }
   pthread_attr_destroy(&attr);
   return NULL;
}

static int append_event(struct mansession *s, const char *str)
{
   struct eventqent *tmp, *prev=NULL;
   tmp = malloc(sizeof(struct eventqent) + strlen(str));
   if (tmp) {
      tmp->next = NULL;
      strcpy(tmp->eventdata, str);
      if (s->eventq) {
         prev = s->eventq;
         while(prev->next) 
            prev = prev->next;
         prev->next = tmp;
      } else {
         s->eventq = tmp;
      }
      return 0;
   }
   return -1;
}

/*! \brief  manager_event: Send AMI event to client */
int manager_event(int category, char *event, char *fmt, ...)
{
   struct mansession *s;
   char auth[80];
   char tmp[4096] = "";
   char *tmp_next = tmp;
   size_t tmp_left = sizeof(tmp) - 2;
   va_list ap;

   ast_mutex_lock(&sessionlock);
   for (s = sessions; s; s = s->next) {
      if ((s->readperm & category) != category)
         continue;

      if ((s->send_events & category) != category)
         continue;

      if (ast_strlen_zero(tmp)) {
         ast_build_string(&tmp_next, &tmp_left, "Event: %s\r\nPrivilege: %s\r\n",
                event, authority_to_str(category, auth, sizeof(auth)));
         va_start(ap, fmt);
         ast_build_string_va(&tmp_next, &tmp_left, fmt, ap);
         va_end(ap);
         *tmp_next++ = '\r';
         *tmp_next++ = '\n';
         *tmp_next = '\0';
      }

      ast_mutex_lock(&s->__lock);
      if (s->busy) {
         append_event(s, tmp);
      } else if (!s->dead) {
         if (ast_carefulwrite(s->fd, tmp, tmp_next - tmp, s->writetimeout) < 0) {
            ast_log(LOG_WARNING, "Disconnecting slow (or gone) manager session!\n");
            s->dead = 1;
            pthread_kill(s->t, SIGURG);
         }
      }
      ast_mutex_unlock(&s->__lock);
   }
   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;
}

/*! \brief register a new command with manager, including online help. This is 
   the preferred way to register a manager command */
int ast_manager_register2(const char *action, int auth, int (*func)(struct mansession *s, struct message *m), const char *synopsis, const 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");
      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;
}
/*! @}
 END Doxygen group */

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, "Keepalive command", mandescr_ping);
      ast_manager_register2("Events", 0, action_events, "Control Event Flow", mandescr_events);
      ast_manager_register2("Logoff", 0, action_logoff, "Logoff Manager", mandescr_logoff);
      ast_manager_register2("Hangup", EVENT_FLAG_CALL, action_hangup, "Hangup Channel", mandescr_hangup);
      ast_manager_register("Status", EVENT_FLAG_CALL, action_status, "Lists channel status" );
      ast_manager_register2("Setvar", EVENT_FLAG_CALL, action_setvar, "Set Channel Variable", mandescr_setvar );
      ast_manager_register2("Getvar", EVENT_FLAG_CALL, action_getvar, "Gets a Channel Variable", mandescr_getvar );
      ast_manager_register2("Redirect", EVENT_FLAG_CALL, action_redirect, "Redirect (transfer) a call", mandescr_redirect );
      ast_manager_register2("Originate", EVENT_FLAG_CALL, action_originate, "Originate Call", mandescr_originate);
      ast_manager_register2("Command", EVENT_FLAG_COMMAND, action_command, "Execute Asterisk CLI Command", mandescr_command );
      ast_manager_register2("ExtensionState", EVENT_FLAG_CALL, action_extensionstate, "Check Extension Status", mandescr_extensionstate );
      ast_manager_register2("AbsoluteTimeout", EVENT_FLAG_CALL, action_timeout, "Set Absolute Timeout", mandescr_timeout );
      ast_manager_register2("MailboxStatus", EVENT_FLAG_CALL, action_mailboxstatus, "Check Mailbox", mandescr_mailboxstatus );
      ast_manager_register2("MailboxCount", EVENT_FLAG_CALL, action_mailboxcount, "Check Mailbox Message Count", mandescr_mailboxcount );
      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;
   displayconnects = 1;
   cfg = ast_config_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, "%5d", &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, "%5d", &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);
   }
   /* Parsing the displayconnects */
   if ((val = ast_variable_retrieve(cfg, "general", "displayconnects"))) {
         displayconnects = ast_true(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_config_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);
      ast_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();
}

---