chan_mgcp.c File Reference

Implementation of Media Gateway Control Protocol. More...

#include "asterisk.h"
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <fcntl.h>
#include <netdb.h>
#include <signal.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <ctype.h>
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/pickup.h"
#include "asterisk/pbx.h"
#include "asterisk/sched.h"
#include "asterisk/io.h"
#include "asterisk/rtp_engine.h"
#include "asterisk/acl.h"
#include "asterisk/callerid.h"
#include "asterisk/cli.h"
#include "asterisk/say.h"
#include "asterisk/astdb.h"
#include "asterisk/features.h"
#include "asterisk/app.h"
#include "asterisk/mwi.h"
#include "asterisk/musiconhold.h"
#include "asterisk/utils.h"
#include "asterisk/netsock2.h"
#include "asterisk/causes.h"
#include "asterisk/dsp.h"
#include "asterisk/devicestate.h"
#include "asterisk/stringfields.h"
#include "asterisk/abstract_jb.h"
#include "asterisk/chanvars.h"
#include "asterisk/pktccops.h"
#include "asterisk/stasis.h"
#include "asterisk/bridge.h"
#include "asterisk/features_config.h"
#include "asterisk/parking.h"
#include "asterisk/stasis_channels.h"
#include "asterisk/format_cache.h"

Go to the source code of this file.

Data Structures
struct	mgcp_endpoint
struct	mgcp_gateway
struct	mgcp_message
	mgcp_message: MGCP message for queuing up More...
struct	mgcp_request
struct	mgcp_response
struct	mgcp_subchannel

Macros
#define	DEFAULT_EXPIRY   120
#define	DEFAULT_MGCP_CA_PORT   2727
#define	DEFAULT_MGCP_GW_PORT   2427
#define	DEFAULT_RETRANS   1000
#define	DIRECTMEDIA   1
#define	INADDR_NONE   (in_addr_t)(-1)
#define	MAX_EXPIRY   3600
#define	MAX_RETRANS   5
#define	MAX_SUBS   2
#define	MGCP_CX_CONF   3
#define	MGCP_CX_CONFERENCE   3
#define	MGCP_CX_INACTIVE   4
#define	MGCP_CX_MUTE   4
#define	MGCP_CX_RECVONLY   1
#define	MGCP_CX_SENDONLY   0
#define	MGCP_CX_SENDRECV   2
#define	MGCP_DTMF_HYBRID   (1 << 2)
#define	MGCP_DTMF_INBAND   (1 << 1)
#define	MGCP_DTMF_RFC2833   (1 << 0)
#define	MGCP_MAX_HEADERS   64
#define	MGCP_MAX_LINES   64
#define	MGCP_MAX_PACKET   1500
#define	MGCP_OFFHOOK   2
#define	MGCP_ONHOOK   1
#define	MGCP_SUBCHANNEL_MAGIC   "!978!"
#define	MGCPDUMPER
#define	RESPONSE_TIMEOUT   30
#define	SUB_ALT   1
#define	SUB_REAL   0
#define	TYPE_LINE   2
#define	TYPE_TRUNK   1

Enumerations
enum	{   MGCP_CMD_EPCF, MGCP_CMD_CRCX, MGCP_CMD_MDCX, MGCP_CMD_DLCX,   MGCP_CMD_RQNT, MGCP_CMD_NTFY, MGCP_CMD_AUEP, MGCP_CMD_AUCX,   MGCP_CMD_RSIP }

Functions
static char *	__get_header (struct mgcp_request *req, char *name, int *start, char *def)
static int	__mgcp_xmit (struct mgcp_gateway *gw, char *data, int len)
static void	__reg_module (void)
static void	__unreg_module (void)
static int	acf_channel_read (struct ast_channel *chan, const char *funcname, char *preparse, char *buf, size_t buflen)
static int	add_header (struct mgcp_request *req, const char *var, const char *value)
static void	add_header_offhook (struct mgcp_subchannel *sub, struct mgcp_request *resp, char *tone)
static int	add_line (struct mgcp_request *req, char *line)
static int	add_sdp (struct mgcp_request *resp, struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
static struct ast_variable *	add_var (const char *buf, struct ast_variable *list)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static int	attempt_transfer (struct mgcp_endpoint *p, struct mgcp_subchannel *sub)
	Complete an attended transfer. More...
static struct mgcp_gateway *	build_gateway (char *cat, struct ast_variable *v)
	build_gateway: parse mgcp.conf and create gateway/endpoint structures More...
static char *	control2str (int ind)
static struct ast_variable *	copy_vars (struct ast_variable *src)
	duplicate a list of channel variables, More...
static void	destroy_endpoint (struct mgcp_endpoint *e)
static void	destroy_gateway (struct mgcp_gateway *g)
static void *	do_monitor (void *data)
static void	dump_cmd_queues (struct mgcp_endpoint *p, struct mgcp_subchannel *sub)
	dump_cmd_queues: (SC:) cleanup pending commands More...
static void	dump_queue (struct mgcp_gateway *gw, struct mgcp_endpoint *p)
static int	find_and_retrans (struct mgcp_subchannel *sub, struct mgcp_request *req)
static struct mgcp_request *	find_command (struct mgcp_endpoint *p, struct mgcp_subchannel *sub, struct mgcp_request **queue, ast_mutex_t *l, int ident)
	find_command: (SC:) remove command transaction from queue More...
static struct mgcp_gateway *	find_realtime_gw (char *name, char *at, struct sockaddr_in *sin)
static struct mgcp_subchannel *	find_subchannel_and_lock (char *name, int msgid, struct sockaddr_in *sin)
static char *	get_csv (char *c, int *len, char **next)
	get_csv: (SC:) get comma separated value More...
static char *	get_header (struct mgcp_request *req, char *name)
static char *	get_sdp (struct mgcp_request *req, char *name)
static char *	get_sdp_by_line (char *line, char *name, int nameLen)
static char *	get_sdp_iterate (int *iterator, struct mgcp_request *req, char *name)
static void	handle_hd_hf (struct mgcp_subchannel *sub, char *ev)
static char *	handle_mgcp_audit_endpoint (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char *	handle_mgcp_set_debug (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char *	handle_mgcp_show_endpoints (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static int	handle_request (struct mgcp_subchannel *sub, struct mgcp_request *req, struct sockaddr_in *sin)
static void	handle_response (struct mgcp_endpoint *p, struct mgcp_subchannel *sub, int result, unsigned int ident, struct mgcp_request *resp)
static int	has_voicemail (struct mgcp_endpoint *p)
static int	init_req (struct mgcp_endpoint *p, struct mgcp_request *req, char *verb, unsigned int oseq)
static int	init_resp (struct mgcp_request *req, char *resp, struct mgcp_request *orig, char *resprest)
static int	load_module (void)
	Load the module. More...
static int	mgcp_alloc_pktcgate (struct mgcp_subchannel *sub)
static int	mgcp_answer (struct ast_channel *ast)
static int	mgcp_call (struct ast_channel *ast, const char *dest, int timeout)
static int	mgcp_devicestate (const char *data)
	mgcp_devicestate: channel callback for device status monitoring More...
static int	mgcp_fixup (struct ast_channel *oldchan, struct ast_channel *newchan)
static void	mgcp_get_codec (struct ast_channel *chan, struct ast_format_cap *result)
static enum ast_rtp_glue_result	mgcp_get_rtp_peer (struct ast_channel *chan, struct ast_rtp_instance **instance)
static int	mgcp_hangup (struct ast_channel *ast)
static int	mgcp_indicate (struct ast_channel *ast, int ind, const void *data, size_t datalen)
static struct ast_channel *	mgcp_new (struct mgcp_subchannel *sub, int state, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor)
static int	mgcp_pktcgate_open (struct cops_gate *gate)
static int	mgcp_pktcgate_remove (struct cops_gate *gate)
static int	mgcp_postrequest (struct mgcp_endpoint *p, struct mgcp_subchannel *sub, char *data, int len, unsigned int seqno)
static int	mgcp_prune_realtime_gateway (struct mgcp_gateway *g)
static void	mgcp_queue_control (struct mgcp_subchannel *sub, int control)
static void	mgcp_queue_frame (struct mgcp_subchannel *sub, struct ast_frame *f)
static void	mgcp_queue_hangup (struct mgcp_subchannel *sub)
static struct ast_frame *	mgcp_read (struct ast_channel *ast)
static char *	mgcp_reload (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static struct ast_channel *	mgcp_request (const char *type, struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *dest, int *cause)
static struct ast_frame *	mgcp_rtp_read (struct mgcp_subchannel *sub)
static int	mgcp_senddigit_begin (struct ast_channel *ast, char digit)
static int	mgcp_senddigit_end (struct ast_channel *ast, char digit, unsigned int duration)
static void	mgcp_set_owner (struct mgcp_subchannel *sub, struct ast_channel *chan)
static int	mgcp_set_rtp_peer (struct ast_channel *chan, struct ast_rtp_instance *rtp, struct ast_rtp_instance *vrtp, struct ast_rtp_instance *trtp, const struct ast_format_cap *cap, int nat_active)
static void *	mgcp_ss (void *data)
static int	mgcp_write (struct ast_channel *ast, struct ast_frame *frame)
static int	mgcpsock_read (int *id, int fd, short events, void *ignore)
static void	parse (struct mgcp_request *req)
static int	process_sdp (struct mgcp_subchannel *sub, struct mgcp_request *req)
static void	prune_gateways (void)
static int	reload (void)
static int	reload_config (int reload)
static int	reqprep (struct mgcp_request *req, struct mgcp_endpoint *p, char *verb)
static int	resend_response (struct mgcp_subchannel *sub, struct mgcp_response *resp)
static int	respprep (struct mgcp_request *resp, struct mgcp_endpoint *p, char *msg, struct mgcp_request *req, char *msgrest)
static int	restart_monitor (void)
static int	retrans_pkt (const void *data)
static void	sdpLineNum_iterator_init (int *iterator)
static int	send_request (struct mgcp_endpoint *p, struct mgcp_subchannel *sub, struct mgcp_request *req, unsigned int seqno)
static int	send_response (struct mgcp_subchannel *sub, struct mgcp_request *req)
static void	start_rtp (struct mgcp_subchannel *sub)
static int	transmit_audit_endpoint (struct mgcp_endpoint *p)
static int	transmit_connect (struct mgcp_subchannel *sub)
static int	transmit_connect_with_sdp (struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
static int	transmit_connection_del (struct mgcp_subchannel *sub)
static int	transmit_connection_del_w_params (struct mgcp_endpoint *p, char *callid, char *cxident)
static int	transmit_modify_request (struct mgcp_subchannel *sub)
static int	transmit_modify_with_sdp (struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp, const struct ast_format_cap *codecs)
static int	transmit_notify_request (struct mgcp_subchannel *sub, char *tone)
static int	transmit_notify_request_with_callerid (struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername)
static int	transmit_response (struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest)
static int	unalloc_sub (struct mgcp_subchannel *sub)
static int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Media Gateway Control Protocol (MGCP)" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_EXTENDED, .load = load_module, .unload = unload_module, .reload = reload, .load_pri = AST_MODPRI_CHANNEL_DRIVER, .optional_modules = "res_pktccops", }
static struct in_addr	__ourip
static char	accountcode [AST_MAX_ACCOUNT_CODE] = ""
static int	adsi = 0
static int	amaflags = 0
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct sockaddr_in	bindaddr
static int	callreturn = 0
static int	callwaiting = 0
static int	cancallforward = 0
static char	cid_name [AST_MAX_EXTENSION] = ""
static char	cid_num [AST_MAX_EXTENSION] = ""
static struct ast_cli_entry	cli_mgcp []
static const char	config [] = "mgcp.conf"
static char	context [AST_MAX_EXTENSION] = "default"
static ast_group_t	cur_callergroup = 0
static ast_group_t	cur_pickupgroup = 0
static struct ast_jb_conf	default_jbconf
static int	directmedia = DIRECTMEDIA
static int	dtmfmode = 0
static int	firstdigittimeout = 16000
static ast_mutex_t	gatelock = { PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP , NULL, {1, 0} }
	gatelock: mutex for gateway/endpoint lists More...
static struct mgcp_gateway *	gateways = NULL
static int	gendigittimeout = 8000
static struct ast_format_cap *	global_capability
static struct ast_jb_conf	global_jbconf
static int	hangupongateremove = 0
static int	immediate = 0
static struct io_context *	io
static char	language [MAX_LANGUAGE] = ""
static char	mailbox [AST_MAX_MAILBOX_UNIQUEID]
static int	matchdigittimeout = 3000
static const char *const	mgcp_cxmodes []
static ast_mutex_t	mgcp_reload_lock = { PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP , NULL, {1, 0} }
static int	mgcp_reloading = 0
static struct ast_rtp_glue	mgcp_rtp_glue
static struct ast_channel_tech	mgcp_tech
static int	mgcpdebug = 0
static int	mgcpsock = -1
static int *	mgcpsock_read_id = NULL
static pthread_t	monitor_thread = AST_PTHREADT_NULL
static ast_mutex_t	monlock = { PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP , NULL, {1, 0} }
static char	musicclass [MAX_MUSICCLASS] = ""
static int	nat = 0
static int	ncs = 0
static ast_mutex_t	netlock = { PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP , NULL, {1, 0} }
static int	nonCodecCapability = AST_RTP_DTMF
static unsigned int	oseq_global = 0
static ast_mutex_t	oseq_lock = { PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP , NULL, {1, 0} }
static char	ourhost [MAXHOSTNAMELEN]
static int	ourport
static char	parkinglot [AST_MAX_CONTEXT]
static int	pktcgatealloc = 0
struct {
unsigned int   cos
unsigned int   cos_audio
unsigned int   tos
unsigned int   tos_audio
}	qos = { 0, 0, 0, 0 }
static struct ast_sched_context *	sched
static int	singlepath = 0
static int	slowsequence = 0
static const char	tdesc [] = "Media Gateway Control Protocol (MGCP)"
static int	threewaycalling = 0
static int	transfer = 0

Detailed Description

Implementation of Media Gateway Control Protocol.

Author

Mark Spencer marks.nosp@m.ter@.nosp@m.digiu.nosp@m.m.co.nosp@m.m

Definition in file chan_mgcp.c.

Macro Definition Documentation

DEFAULT_EXPIRY

#define DEFAULT_EXPIRY   120

Definition at line 96 of file chan_mgcp.c.

DEFAULT_MGCP_CA_PORT

#define DEFAULT_MGCP_CA_PORT   2727

From RFC 2705

Definition at line 124 of file chan_mgcp.c.

Referenced by reload_config().

DEFAULT_MGCP_GW_PORT

#define DEFAULT_MGCP_GW_PORT   2427

From RFC 2705

Definition at line 123 of file chan_mgcp.c.

Referenced by build_gateway().

DEFAULT_RETRANS

#define DEFAULT_RETRANS   1000

How frequently to retransmit

Definition at line 126 of file chan_mgcp.c.

Referenced by __sip_reliable_xmit(), mgcp_postrequest(), and retrans_pkt().

DIRECTMEDIA

#define DIRECTMEDIA   1

Definition at line 98 of file chan_mgcp.c.

Referenced by build_gateway().

INADDR_NONE

#define INADDR_NONE   (in_addr_t)(-1)

Definition at line 101 of file chan_mgcp.c.

Referenced by build_gateway().

MAX_EXPIRY

#define MAX_EXPIRY   3600

Definition at line 97 of file chan_mgcp.c.

MAX_RETRANS

#define MAX_RETRANS   5

Try only 5 times for retransmissions

Definition at line 127 of file chan_mgcp.c.

Referenced by retrans_pkt().

MAX_SUBS

#define MAX_SUBS   2

Definition at line 291 of file chan_mgcp.c.

Referenced by build_gateway(), destroy_endpoint(), and mgcp_prune_realtime_gateway().

MGCP_CX_CONF

#define MGCP_CX_CONF   3

Definition at line 133 of file chan_mgcp.c.

Referenced by handle_request().

MGCP_CX_CONFERENCE

#define MGCP_CX_CONFERENCE   3

Definition at line 134 of file chan_mgcp.c.

MGCP_CX_INACTIVE

#define MGCP_CX_INACTIVE   4

Definition at line 136 of file chan_mgcp.c.

Referenced by build_gateway(), mgcp_hangup(), and unalloc_sub().

MGCP_CX_MUTE

#define MGCP_CX_MUTE   4

Definition at line 135 of file chan_mgcp.c.

Referenced by handle_request().

MGCP_CX_RECVONLY

#define MGCP_CX_RECVONLY   1

Definition at line 131 of file chan_mgcp.c.

Referenced by handle_request(), mgcp_call(), and mgcp_hangup().

MGCP_CX_SENDONLY

#define MGCP_CX_SENDONLY   0

MGCP rtp stream modes {

Definition at line 130 of file chan_mgcp.c.

MGCP_CX_SENDRECV

#define MGCP_CX_SENDRECV   2

Definition at line 132 of file chan_mgcp.c.

Referenced by handle_hd_hf(), handle_request(), mgcp_answer(), and mgcp_call().

MGCP_DTMF_HYBRID

#define MGCP_DTMF_HYBRID   (1 << 2)

Definition at line 121 of file chan_mgcp.c.

Referenced by add_header_offhook(), build_gateway(), mgcp_hangup(), mgcp_new(), mgcp_senddigit_begin(), mgcp_senddigit_end(), and mgcp_ss().

MGCP_DTMF_INBAND

#define MGCP_DTMF_INBAND   (1 << 1)

Definition at line 120 of file chan_mgcp.c.

Referenced by add_header_offhook(), build_gateway(), mgcp_hangup(), mgcp_new(), mgcp_rtp_read(), mgcp_senddigit_begin(), mgcp_senddigit_end(), and mgcp_ss().

MGCP_DTMF_RFC2833

#define MGCP_DTMF_RFC2833   (1 << 0)

Definition at line 119 of file chan_mgcp.c.

Referenced by build_gateway(), mgcp_rtp_read(), mgcp_senddigit_begin(), and mgcp_senddigit_end().

MGCP_MAX_HEADERS

#define MGCP_MAX_HEADERS   64

The private structures of the mgcp channels are linked for selecting outgoing channels

Definition at line 250 of file chan_mgcp.c.

Referenced by add_header(), init_req(), init_resp(), and parse().

MGCP_MAX_LINES

#define MGCP_MAX_LINES   64

Definition at line 251 of file chan_mgcp.c.

Referenced by add_line(), and parse().

MGCP_MAX_PACKET

#define MGCP_MAX_PACKET   1500

Also from RFC 2543, should sub headers tho

Definition at line 125 of file chan_mgcp.c.

MGCP_OFFHOOK

#define MGCP_OFFHOOK   2

Definition at line 327 of file chan_mgcp.c.

Referenced by handle_hd_hf(), handle_request(), handle_response(), mgcp_call(), mgcp_hangup(), transmit_modify_request(), transmit_notify_request(), and transmit_notify_request_with_callerid().

MGCP_ONHOOK

#define MGCP_ONHOOK   1

Definition at line 326 of file chan_mgcp.c.

Referenced by build_gateway(), do_monitor(), handle_request(), handle_response(), mgcp_call(), mgcp_hangup(), mgcp_request(), transmit_modify_request(), transmit_notify_request(), and transmit_notify_request_with_callerid().

MGCP_SUBCHANNEL_MAGIC

#define MGCP_SUBCHANNEL_MAGIC   "!978!"

subchannel magic string. Needed to prove that any subchannel pointer passed by asterisk really points to a valid subchannel memory area. Ugly.. But serves the purpose for the time being.

Definition at line 302 of file chan_mgcp.c.

Referenced by build_gateway(), and mgcp_hangup().

MGCPDUMPER

#define MGCPDUMPER

Definition at line 95 of file chan_mgcp.c.

RESPONSE_TIMEOUT

#define RESPONSE_TIMEOUT   30

in seconds

Definition at line 281 of file chan_mgcp.c.

Referenced by find_and_retrans().

SUB_ALT

#define SUB_ALT   1

Definition at line 294 of file chan_mgcp.c.

SUB_REAL

#define SUB_REAL   0

Definition at line 293 of file chan_mgcp.c.

TYPE_LINE

#define TYPE_LINE   2

Definition at line 330 of file chan_mgcp.c.

Referenced by build_gateway(), do_monitor(), and mgcp_call().

TYPE_TRUNK

#define TYPE_TRUNK   1

Definition at line 329 of file chan_mgcp.c.

Referenced by build_gateway().

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
MGCP_CMD_EPCF
MGCP_CMD_CRCX
MGCP_CMD_MDCX
MGCP_CMD_DLCX
MGCP_CMD_RQNT
MGCP_CMD_NTFY
MGCP_CMD_AUEP
MGCP_CMD_AUCX
MGCP_CMD_RSIP

Definition at line 147 of file chan_mgcp.c.

     {
   MGCP_CMD_EPCF,
   MGCP_CMD_CRCX,
   MGCP_CMD_MDCX,
   MGCP_CMD_DLCX,
   MGCP_CMD_RQNT,
   MGCP_CMD_NTFY,
   MGCP_CMD_AUEP,
   MGCP_CMD_AUCX,
   MGCP_CMD_RSIP
};

Function Documentation

__get_header()

static char* __get_header ( struct mgcp_request *  req, char *  name, int *  start, char *  def  )

static

Definition at line 1635 of file chan_mgcp.c.

References mgcp_request::header, mgcp_request::headers, and len().

Referenced by get_header().

{
   int x;
   int len = strlen(name);
   char *r;
   for (x = *start; x < req->headers; x++) {
      if (!strncasecmp(req->header[x], name, len) &&
          (req->header[x][len] == ':')) {
         r = req->header[x] + len + 1;
         while (*r && (*r < 33)) {
            r++;
         }
         *start = x + 1;
         return r;
      }
   }
   /* Don't return NULL, so get_header is always a valid pointer */
   return def;
}

__mgcp_xmit()

static int __mgcp_xmit ( struct mgcp_gateway *  gw, char *  data, int  len  )

static

Definition at line 534 of file chan_mgcp.c.

References mgcp_gateway::addr, ast_log, mgcp_gateway::defaddr, errno, LOG_WARNING, and mgcpsock.

Referenced by mgcp_postrequest(), resend_response(), retrans_pkt(), and send_response().

{
   int res;
   if (gw->addr.sin_addr.s_addr)
      res=sendto(mgcpsock, data, len, 0, (struct sockaddr *)&gw->addr, sizeof(struct sockaddr_in));
   else
      res=sendto(mgcpsock, data, len, 0, (struct sockaddr *)&gw->defaddr, sizeof(struct sockaddr_in));
   if (res != len) {
      ast_log(LOG_WARNING, "mgcp_xmit returned %d: %s\n", res, strerror(errno));
   }
   return res;
}

__reg_module()

static void __reg_module ( void  )

static

Definition at line 5025 of file chan_mgcp.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 5025 of file chan_mgcp.c.

acf_channel_read()

static int acf_channel_read ( struct ast_channel *  chan, const char *  funcname, char *  preparse, char *  buf, size_t  buflen  )

static

Definition at line 4519 of file chan_mgcp.c.

References ast_channel_tech(), ast_channel_tech_pvt(), ast_log, LOG_ERROR, mgcp_endpoint::ncs, mgcp_subchannel::parent, and sub.

{
   struct mgcp_subchannel *sub = ast_channel_tech_pvt(chan);
   int res = 0;

   /* Sanity check */
   if (!chan || ast_channel_tech(chan) != &mgcp_tech) {
      ast_log(LOG_ERROR, "This function requires a valid MGCP channel\n");
      return -1;
   }

   if (!strcasecmp(args, "ncs")) {
      snprintf(buf, buflen, "%s", sub->parent->ncs ?  "yes":"no");
   } else {
      res = -1;
   }
   return res;
}

add_header()

static int add_header ( struct mgcp_request *  req, const char *  var, const char *  value  )

static

Definition at line 2065 of file chan_mgcp.c.

References ast_log, mgcp_request::data, mgcp_request::header, mgcp_request::headers, mgcp_request::len, mgcp_request::lines, LOG_WARNING, and MGCP_MAX_HEADERS.

Referenced by add_header_offhook(), transmit_audit_endpoint(), transmit_connect(), transmit_connect_with_sdp(), transmit_connection_del(), transmit_connection_del_w_params(), transmit_modify_request(), transmit_modify_with_sdp(), transmit_notify_request(), and transmit_notify_request_with_callerid().

{
   if (req->len >= sizeof(req->data) - 4) {
      ast_log(LOG_WARNING, "Out of space, can't add anymore\n");
      return -1;
   }
   if (req->lines) {
      ast_log(LOG_WARNING, "Can't add more headers when lines have been added\n");
      return -1;
   }
   req->header[req->headers] = req->data + req->len;
   snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s: %s\r\n", var, value);
   req->len += strlen(req->header[req->headers]);
   if (req->headers < MGCP_MAX_HEADERS) {
      req->headers++;
   } else {
      ast_log(LOG_WARNING, "Out of header space\n");
      return -1;
   }
   return 0;
}

add_header_offhook()

static void add_header_offhook ( struct mgcp_subchannel *  sub, struct mgcp_request *  resp, char *  tone  )

static

Definition at line 2648 of file chan_mgcp.c.

References add_header(), ast_debug, AST_STATE_RINGING, mgcp_endpoint::dtmfmode, MGCP_DTMF_HYBRID, MGCP_DTMF_INBAND, mgcp_endpoint::ncs, mgcp_subchannel::owner, mgcp_subchannel::parent, and mgcp_endpoint::sub.

Referenced by transmit_modify_request(), transmit_notify_request(), and transmit_notify_request_with_callerid().

{
   struct mgcp_endpoint *p = sub->parent;
   char tone_indicate_end = 0;

   /* We also should check the tone to indicate, because it have no sense
      to request notify D/[0-9#*] (dtmf keys) if we are sending congestion
      tone for example G/cg */
   if (p && (!strcasecmp(tone, (p->ncs ? "L/ro" : "G/cg")))) {
      tone_indicate_end = 1;
   }

   if (p && p->sub && p->sub->owner &&
         ast_channel_state(p->sub->owner) >= AST_STATE_RINGING &&
         (p->dtmfmode & (MGCP_DTMF_INBAND | MGCP_DTMF_HYBRID))) {
       add_header(resp, "R", "L/hu(N),L/hf(N)");

   } else if (!tone_indicate_end){
       add_header(resp, "R", (p->ncs ? "L/hu(N),L/hf(N),L/[0-9#*](N)" : "L/hu(N),L/hf(N),D/[0-9#*](N)"));
   } else {
      ast_debug(1, "We don't want more digits if we will end the call\n");
      add_header(resp, "R", "L/hu(N),L/hf(N)");
   }
}

add_line()

static int add_line ( struct mgcp_request *  req, char *  line  )

static

Definition at line 2087 of file chan_mgcp.c.

References ast_copy_string(), ast_log, mgcp_request::data, mgcp_request::len, mgcp_request::line, mgcp_request::lines, LOG_WARNING, and MGCP_MAX_LINES.

Referenced by add_sdp().

{
   if (req->len >= sizeof(req->data) - 4) {
      ast_log(LOG_WARNING, "Out of space, can't add anymore\n");
      return -1;
   }
   if (!req->lines) {
      /* Add extra empty return */
      ast_copy_string(req->data + req->len, "\r\n", sizeof(req->data) - req->len);
      req->len += strlen(req->data + req->len);
   }
   req->line[req->lines] = req->data + req->len;
   snprintf(req->line[req->lines], sizeof(req->data) - req->len, "%s", line);
   req->len += strlen(req->line[req->lines]);
   if (req->lines < MGCP_MAX_LINES) {
      req->lines++;
   } else {
      ast_log(LOG_WARNING, "Out of line space\n");
      return -1;
   }
   return 0;
}

add_sdp()

static int add_sdp ( struct mgcp_request *  resp, struct mgcp_subchannel *  sub, struct ast_rtp_instance *  rtp  )

static

Definition at line 2201 of file chan_mgcp.c.

References a, add_line(), ao2_ref, ast_copy_string(), ast_debug, ast_format_cap_count(), ast_format_cap_get_format(), ast_format_get_name(), ast_format_get_type(), ast_inet_ntoa(), ast_log, AST_MEDIA_TYPE_AUDIO, ast_rtp_codecs_payload_code(), AST_RTP_DTMF, ast_rtp_instance_get_codecs(), ast_rtp_instance_get_local_address(), ast_rtp_instance_get_remote_address, ast_rtp_lookup_mime_subtype2(), AST_RTP_MAX, ast_sockaddr_to_sin, c, mgcp_endpoint::cap, format, len(), LOG_WARNING, mgcp_endpoint::nonCodecCapability, NULL, mgcp_gateway::ourip, mgcp_subchannel::parent, mgcp_endpoint::parent, mgcp_subchannel::rtp, and mgcp_subchannel::tmpdest.

Referenced by transmit_connect_with_sdp(), transmit_modify_request(), and transmit_modify_with_sdp().

{
   int len;
   int codec;
   char costr[80];
   struct sockaddr_in sin;
   struct ast_sockaddr sin_tmp;
   char v[256];
   char s[256];
   char o[256];
   char c[256];
   char t[256];
   char m[256] = "";
   char a[1024] = "";
   int x;
   struct sockaddr_in dest = { 0, };
   struct ast_sockaddr dest_tmp;
   struct mgcp_endpoint *p = sub->parent;
   /* XXX We break with the "recommendation" and send our IP, in order that our
          peer doesn't have to ast_gethostbyname() us XXX */
   len = 0;
   if (!sub->rtp) {
      ast_log(LOG_WARNING, "No way to add SDP without an RTP structure\n");
      return -1;
   }
   ast_rtp_instance_get_local_address(sub->rtp, &sin_tmp);
   ast_sockaddr_to_sin(&sin_tmp, &sin);
   if (rtp) {
      ast_rtp_instance_get_remote_address(sub->rtp, &dest_tmp);
      ast_sockaddr_to_sin(&dest_tmp, &dest);
   } else {
      if (sub->tmpdest.sin_addr.s_addr) {
         dest.sin_addr = sub->tmpdest.sin_addr;
         dest.sin_port = sub->tmpdest.sin_port;
         /* Reset temporary destination */
         memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
      } else {
         dest.sin_addr = p->parent->ourip;
         dest.sin_port = sin.sin_port;
      }
   }
   ast_debug(1, "We're at %s port %d\n", ast_inet_ntoa(p->parent->ourip), ntohs(sin.sin_port));
   ast_copy_string(v, "v=0\r\n", sizeof(v));
   snprintf(o, sizeof(o), "o=root %d %d IN IP4 %s\r\n", (int)getpid(), (int)getpid(), ast_inet_ntoa(dest.sin_addr));
   ast_copy_string(s, "s=session\r\n", sizeof(s));
   snprintf(c, sizeof(c), "c=IN IP4 %s\r\n", ast_inet_ntoa(dest.sin_addr));
   ast_copy_string(t, "t=0 0\r\n", sizeof(t));
   snprintf(m, sizeof(m), "m=audio %d RTP/AVP", ntohs(dest.sin_port));

   for (x = 0; x < ast_format_cap_count(p->cap); x++) {
      struct ast_format *format = ast_format_cap_get_format(p->cap, x);

      if (ast_format_get_type(format) != AST_MEDIA_TYPE_AUDIO) {
         ao2_ref(format, -1);
         continue;
      }

      ast_debug(1, "Answering with capability %s\n", ast_format_get_name(format));
      codec = ast_rtp_codecs_payload_code(ast_rtp_instance_get_codecs(sub->rtp), 1, format, 0);
      if (codec > -1) {
         snprintf(costr, sizeof(costr), " %d", codec);
         strncat(m, costr, sizeof(m) - strlen(m) - 1);
         snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype2(1, format, 0, 0));
         strncat(a, costr, sizeof(a) - strlen(a) - 1);
      }

      ao2_ref(format, -1);
   }

   for (x = 1LL; x <= AST_RTP_MAX; x <<= 1) {
      if (p->nonCodecCapability & x) {
         ast_debug(1, "Answering with non-codec capability %d\n", (int) x);
         codec = ast_rtp_codecs_payload_code(ast_rtp_instance_get_codecs(sub->rtp), 0, NULL, x);
         if (codec > -1) {
            snprintf(costr, sizeof(costr), " %d", codec);
            strncat(m, costr, sizeof(m) - strlen(m) - 1);
            snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype2(0, NULL, x, 0));
            strncat(a, costr, sizeof(a) - strlen(a) - 1);
            if (x == AST_RTP_DTMF) {
               /* Indicate we support DTMF...  Not sure about 16,
                  but MSN supports it so dang it, we will too... */
               snprintf(costr, sizeof costr, "a=fmtp:%d 0-16\r\n", codec);
               strncat(a, costr, sizeof(a) - strlen(a) - 1);
            }
         }
      }
   }
   strncat(m, "\r\n", sizeof(m) - strlen(m) - 1);
   len = strlen(v) + strlen(s) + strlen(o) + strlen(c) + strlen(t) + strlen(m) + strlen(a);
   snprintf(costr, sizeof(costr), "%d", len);
   add_line(resp, v);
   add_line(resp, o);
   add_line(resp, s);
   add_line(resp, c);
   add_line(resp, t);
   add_line(resp, m);
   add_line(resp, a);
   return 0;
}

add_var()

static struct ast_variable * add_var ( const char *  buf, struct ast_variable *  list  )

static

Definition at line 4651 of file chan_mgcp.c.

References ast_strdupa, ast_variable_new, ast_variable::next, and NULL.

Referenced by build_gateway().

{
   struct ast_variable *tmpvar = NULL;
   char *varname = ast_strdupa(buf), *varval = NULL;

   if ((varval = strchr(varname, '='))) {
      *varval++ = '\0';
      if ((tmpvar = ast_variable_new(varname, varval, ""))) {
         tmpvar->next = list;
         list = tmpvar;
      }
   }
   return list;
}

AST_MODULE_SELF_SYM()

struct ast_module* AST_MODULE_SELF_SYM

(

void

)

Definition at line 5025 of file chan_mgcp.c.

attempt_transfer()

static int attempt_transfer ( struct mgcp_endpoint *  p, struct mgcp_subchannel *  sub  )

static

Complete an attended transfer.

Parameters

p	The endpoint performing the attended transfer
sub	The sub-channel completing the attended transfer

Note

p->sub is the currently active sub-channel (the channel the phone is using)

p->sub->next is the sub-channel not in use, potentially on hold

Return values

0	when channel should be hung up
1	when channel should not be hung up

Definition at line 3281 of file chan_mgcp.c.

References mgcp_subchannel::alreadygone, ast_bridge_transfer_attended(), AST_BRIDGE_TRANSFER_SUCCESS, ast_channel_softhangup_internal_flag_add(), AST_CONTROL_RINGING, ast_mutex_lock, ast_mutex_unlock, ast_queue_control(), ast_queue_unhold(), AST_SOFTHANGUP_DEV, AST_STATE_RINGING, mgcp_subchannel::lock, mgcp_queue_hangup(), mgcp_subchannel::next, mgcp_subchannel::owner, sub, mgcp_endpoint::sub, and unalloc_sub().

Referenced by handle_request().

{
   enum ast_transfer_result res;

   /* Ensure that the other channel goes off hold and that it is indicating properly */
   ast_queue_unhold(sub->next->owner);
   if (ast_channel_state(sub->owner) == AST_STATE_RINGING) {
      ast_queue_control(sub->next->owner, AST_CONTROL_RINGING);
   }

   ast_mutex_unlock(&p->sub->next->lock);
   ast_mutex_unlock(&p->sub->lock);
   res = ast_bridge_transfer_attended(sub->owner, sub->next->owner);

   /* Subs are only freed when the endpoint itself is destroyed, so they will continue to exist
    * after ast_bridge_transfer_attended returns making this safe without reference counting
    */
   ast_mutex_lock(&p->sub->lock);
   ast_mutex_lock(&p->sub->next->lock);

   if (res != AST_BRIDGE_TRANSFER_SUCCESS) {
      /* If transferring fails hang up the other channel if present and us */
      if (sub->next->owner) {
         ast_channel_softhangup_internal_flag_add(sub->next->owner, AST_SOFTHANGUP_DEV);
         mgcp_queue_hangup(sub->next);
      }
      sub->next->alreadygone = 1;
      return 0;
   }

   unalloc_sub(sub->next);

   /* If the active sub is NOT the one completing the transfer change it to be, and hang up the other sub */
   if (p->sub != sub) {
      p->sub = sub;
      return 1;
   }

   return 0;
}

build_gateway()

static struct mgcp_gateway * build_gateway ( char *  cat, struct ast_variable *  v  )

static

build_gateway: parse mgcp.conf and create gateway/endpoint structures

Definition at line 4016 of file chan_mgcp.c.

References __ourip, accountcode, mgcp_endpoint::accountcode, add_var(), mgcp_gateway::addr, adsi, mgcp_endpoint::adsi, amaflags, mgcp_endpoint::amaflags, ast_append_ha(), ast_callerid_split(), ast_calloc, ast_channel_string2amaflag(), ast_copy_string(), ast_format_cap_alloc, ast_format_cap_append_from_cap(), AST_FORMAT_CAP_FLAG_DEFAULT, ast_free, ast_get_group(), ast_get_ip(), ast_log, AST_MEDIA_TYPE_UNKNOWN, ast_mutex_destroy, ast_mutex_init, ast_mwi_subscribe_pool(), ast_ouraddrfor(), ast_random(), AST_SCHED_DEL, ast_sockaddr_from_sin, ast_sockaddr_to_sin, ast_strlen_zero, ast_true(), ast_variables_destroy(), ast_verb, mgcp_endpoint::callgroup, callreturn, mgcp_endpoint::callreturn, callwaiting, mgcp_endpoint::callwaiting, cancallforward, mgcp_endpoint::cancallforward, mgcp_endpoint::cap, mgcp_endpoint::chanvars, cid_name, mgcp_endpoint::cid_name, cid_num, mgcp_endpoint::cid_num, mgcp_endpoint::cmd_queue_lock, context, mgcp_endpoint::context, copy_vars(), cur_callergroup, cur_pickupgroup, mgcp_subchannel::cx_queue_lock, mgcp_subchannel::cxmode, mgcp_gateway::defaddr, DEFAULT_MGCP_GW_PORT, mgcp_endpoint::delme, mgcp_gateway::delme, DIRECTMEDIA, directmedia, mgcp_endpoint::directmedia, dtmfmode, mgcp_endpoint::dtmfmode, mgcp_gateway::dynamic, mgcp_gateway::endpoints, mgcp_gateway::expire, mgcp_subchannel::gate, gateways, mgcp_gateway::ha, hangupongateremove, mgcp_endpoint::hangupongateremove, mgcp_endpoint::hascallwaiting, mgcp_endpoint::hookstate, mgcp_subchannel::id, immediate, mgcp_endpoint::immediate, INADDR_NONE, mgcp_gateway::isnamedottedip, language, mgcp_endpoint::language, ast_variable::lineno, mgcp_subchannel::lock, mgcp_endpoint::lock, LOG_ERROR, LOG_WARNING, mgcp_subchannel::magic, mailbox, mgcp_endpoint::mailbox, MAX_SUBS, MGCP_CX_INACTIVE, MGCP_DTMF_HYBRID, MGCP_DTMF_INBAND, MGCP_DTMF_RFC2833, MGCP_ONHOOK, MGCP_SUBCHANNEL_MAGIC, mgcp_gateway::msgs_lock, mgcp_endpoint::msgstate, musicclass, mgcp_endpoint::musicclass, mgcp_endpoint::mwi_event_sub, ast_variable::name, mgcp_endpoint::name, mgcp_gateway::name, nat, mgcp_subchannel::nat, ncs, mgcp_endpoint::ncs, mgcp_endpoint::needaudit, ast_variable::next, mgcp_subchannel::next, mgcp_endpoint::next, mgcp_gateway::next, NULL, mgcp_endpoint::onhooktime, mgcp_gateway::ourip, mgcp_subchannel::parent, mgcp_endpoint::parent, parkinglot, mgcp_endpoint::parkinglot, mgcp_endpoint::pickupgroup, pktcgatealloc, mgcp_endpoint::pktcgatealloc, mgcp_gateway::realtime, mgcp_gateway::retransid, mgcp_endpoint::rqnt_ident, mgcp_endpoint::rqnt_queue_lock, mgcp_subchannel::rtp, mgcp_subchannel::sdpsent, singlepath, mgcp_endpoint::singlepath, slowsequence, mgcp_endpoint::slowsequence, stasis_subscription_cb_noop(), sub, mgcp_endpoint::sub, threewaycalling, mgcp_endpoint::threewaycalling, transfer, mgcp_endpoint::transfer, mgcp_subchannel::txident, mgcp_endpoint::type, TYPE_LINE, TYPE_TRUNK, ast_variable::value, and mgcp_gateway::wcardep.

Referenced by find_realtime_gw(), and reload_config().

{
   struct mgcp_gateway *gw;
   struct mgcp_endpoint *e;
   struct mgcp_subchannel *sub;
   struct ast_variable *chanvars = NULL;

   /*char txident[80];*/
   int i=0, y=0;
   int gw_reload = 0;
   int ep_reload = 0;
   directmedia = DIRECTMEDIA;

   /* locate existing gateway */
   for (gw = gateways; gw; gw = gw->next) {
      if (!strcasecmp(cat, gw->name)) {
         /* gateway already exists */
         gw->delme = 0;
         gw_reload = 1;
         break;
      }
   }

   if (!gw && !(gw = ast_calloc(1, sizeof(*gw)))) {
      return NULL;
   }

   if (!gw_reload) {
      gw->expire = -1;
      gw->realtime = 0;
      gw->retransid = -1;
      ast_mutex_init(&gw->msgs_lock);
      ast_copy_string(gw->name, cat, sizeof(gw->name));
      /* check if the name is numeric ip */
      if ((strchr(gw->name, '.')) && inet_addr(gw->name) != INADDR_NONE)
         gw->isnamedottedip = 1;
   }
   for (; v; v = v->next) {
      if (!strcasecmp(v->name, "host")) {
         if (!strcasecmp(v->value, "dynamic")) {
            /* They'll register with us */
            gw->dynamic = 1;
            memset(&gw->addr.sin_addr, 0, 4);
            if (gw->addr.sin_port) {
               /* If we've already got a port, make it the default rather than absolute */
               gw->defaddr.sin_port = gw->addr.sin_port;
               gw->addr.sin_port = 0;
            }
         } else {
            /* Non-dynamic.  Make sure we become that way if we're not */
            AST_SCHED_DEL(sched, gw->expire);
            gw->dynamic = 0;
            {
               struct ast_sockaddr tmp;

               ast_sockaddr_from_sin(&tmp, &gw->addr);
               if (ast_get_ip(&tmp, v->value)) {
                  if (!gw_reload) {
                     ast_mutex_destroy(&gw->msgs_lock);
                     ast_free(gw);
                  }
                  return NULL;
               }
               ast_sockaddr_to_sin(&tmp, &gw->addr);
            }
         }
      } else if (!strcasecmp(v->name, "defaultip")) {
         struct ast_sockaddr tmp;

         ast_sockaddr_from_sin(&tmp, &gw->defaddr);
         if (ast_get_ip(&tmp, v->value)) {
            if (!gw_reload) {
               ast_mutex_destroy(&gw->msgs_lock);
               ast_free(gw);
            }
            return NULL;
         }
         ast_sockaddr_to_sin(&tmp, &gw->defaddr);
      } else if (!strcasecmp(v->name, "permit") ||
         !strcasecmp(v->name, "deny")) {
         int acl_error = 0;
         gw->ha = ast_append_ha(v->name, v->value, gw->ha, &acl_error);
         if (acl_error) {
            ast_log(LOG_ERROR, "Invalid ACL '%s' specified for MGCP gateway '%s' on line %d. Not creating.\n",
                  v->value, cat, v->lineno);
            if (!gw_reload) {
               ast_mutex_destroy(&gw->msgs_lock);
               ast_free(gw);
            } else {
               gw->delme = 1;
            }
            return NULL;
         }
      } else if (!strcasecmp(v->name, "port")) {
         gw->addr.sin_port = htons(atoi(v->value));
      } else if (!strcasecmp(v->name, "context")) {
         ast_copy_string(context, v->value, sizeof(context));
      } else if (!strcasecmp(v->name, "dtmfmode")) {
         if (!strcasecmp(v->value, "inband"))
            dtmfmode = MGCP_DTMF_INBAND;
         else if (!strcasecmp(v->value, "rfc2833"))
            dtmfmode = MGCP_DTMF_RFC2833;
         else if (!strcasecmp(v->value, "hybrid"))
            dtmfmode = MGCP_DTMF_HYBRID;
         else if (!strcasecmp(v->value, "none"))
            dtmfmode = 0;
         else
            ast_log(LOG_WARNING, "'%s' is not a valid DTMF mode at line %d\n", v->value, v->lineno);
      } else if (!strcasecmp(v->name, "nat")) {
         nat = ast_true(v->value);
      } else if (!strcasecmp(v->name, "ncs")) {
         ncs = ast_true(v->value);
      } else if (!strcasecmp(v->name, "hangupongateremove")) {
         hangupongateremove = ast_true(v->value);
      } else if (!strcasecmp(v->name, "pktcgatealloc")) {
         pktcgatealloc = ast_true(v->value);
      } else if (!strcasecmp(v->name, "callerid")) {
         if (!strcasecmp(v->value, "asreceived")) {
            cid_num[0] = '\0';
            cid_name[0] = '\0';
         } else {
            ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num));
         }
      } else if (!strcasecmp(v->name, "language")) {
         ast_copy_string(language, v->value, sizeof(language));
      } else if (!strcasecmp(v->name, "accountcode")) {
         ast_copy_string(accountcode, v->value, sizeof(accountcode));
      } else if (!strcasecmp(v->name, "amaflags")) {
         y = ast_channel_string2amaflag(v->value);
         if (y < 0) {
            ast_log(LOG_WARNING, "Invalid AMA flags: %s at line %d\n", v->value, v->lineno);
         } else {
            amaflags = y;
         }
      } else if (!strcasecmp(v->name, "setvar")) {
         chanvars = add_var(v->value, chanvars);
      } else if (!strcasecmp(v->name, "clearvars")) {
         if (chanvars) {
            ast_variables_destroy(chanvars);
            chanvars = NULL;
         }
      } else if (!strcasecmp(v->name, "musiconhold")) {
         ast_copy_string(musicclass, v->value, sizeof(musicclass));
      } else if (!strcasecmp(v->name, "parkinglot")) {
         ast_copy_string(parkinglot, v->value, sizeof(parkinglot));
      } else if (!strcasecmp(v->name, "callgroup")) {
         cur_callergroup = ast_get_group(v->value);
      } else if (!strcasecmp(v->name, "pickupgroup")) {
         cur_pickupgroup = ast_get_group(v->value);
      } else if (!strcasecmp(v->name, "immediate")) {
         immediate = ast_true(v->value);
      } else if (!strcasecmp(v->name, "cancallforward")) {
         cancallforward = ast_true(v->value);
      } else if (!strcasecmp(v->name, "singlepath")) {
         singlepath = ast_true(v->value);
      } else if (!strcasecmp(v->name, "directmedia") || !strcasecmp(v->name, "canreinvite")) {
         directmedia = ast_true(v->value);
      } else if (!strcasecmp(v->name, "mailbox")) {
         ast_copy_string(mailbox, v->value, sizeof(mailbox));
      } else if (!strcasecmp(v->name, "hasvoicemail")) {
         if (ast_true(v->value) && ast_strlen_zero(mailbox)) {
            /*
             * hasvoicemail is a users.conf legacy voicemail enable method.
             * hasvoicemail is only going to work for app_voicemail mailboxes.
             */
            if (strchr(gw->name, '@')) {
               ast_copy_string(mailbox, gw->name, sizeof(mailbox));
            } else {
               snprintf(mailbox, sizeof(mailbox), "%s@default", gw->name);
            }
         }
      } else if (!strcasecmp(v->name, "adsi")) {
         adsi = ast_true(v->value);
      } else if (!strcasecmp(v->name, "callreturn")) {
         callreturn = ast_true(v->value);
      } else if (!strcasecmp(v->name, "callwaiting")) {
         callwaiting = ast_true(v->value);
      } else if (!strcasecmp(v->name, "slowsequence")) {
         slowsequence = ast_true(v->value);
      } else if (!strcasecmp(v->name, "transfer")) {
         transfer = ast_true(v->value);
      } else if (!strcasecmp(v->name, "threewaycalling")) {
         threewaycalling = ast_true(v->value);
      } else if (!strcasecmp(v->name, "wcardep")) {
         /* locate existing endpoint */
         for (e = gw->endpoints; e; e = e->next) {
            if (!strcasecmp(v->value, e->name)) {
               /* endpoint already exists */
               e->delme = 0;
               ep_reload = 1;
               break;
            }
         }

         if (!e) {
            /* Allocate wildcard endpoint */
            e = ast_calloc(1, sizeof(*e));
            ep_reload = 0;
         }

         if (e) {
            if (!ep_reload) {
               memset(e, 0, sizeof(struct mgcp_endpoint));
               ast_mutex_init(&e->lock);
               ast_mutex_init(&e->rqnt_queue_lock);
               ast_mutex_init(&e->cmd_queue_lock);
               e->cap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
               ast_copy_string(e->name, v->value, sizeof(e->name));
               e->needaudit = 1;
            }
            ast_copy_string(gw->wcardep, v->value, sizeof(gw->wcardep));
            /* XXX Should we really check for uniqueness?? XXX */
            ast_copy_string(e->accountcode, accountcode, sizeof(e->accountcode));
            ast_copy_string(e->context, context, sizeof(e->context));
            ast_copy_string(e->cid_num, cid_num, sizeof(e->cid_num));
            ast_copy_string(e->cid_name, cid_name, sizeof(e->cid_name));
            ast_copy_string(e->language, language, sizeof(e->language));
            ast_copy_string(e->musicclass, musicclass, sizeof(e->musicclass));
            ast_copy_string(e->mailbox, mailbox, sizeof(e->mailbox));
            ast_copy_string(e->parkinglot, parkinglot, sizeof(e->parkinglot));
            if (!ast_strlen_zero(e->mailbox)) {
               /* This module does not handle MWI in an event-based manner.  However, it
                * subscribes to MWI for each mailbox that is configured so that the core
                * knows that we care about it.  Then, chan_mgcp will get the MWI from the
                * event cache instead of checking the mailbox directly. */
               e->mwi_event_sub = ast_mwi_subscribe_pool(e->mailbox, stasis_subscription_cb_noop, NULL);
            }
            snprintf(e->rqnt_ident, sizeof(e->rqnt_ident), "%08lx", (unsigned long)ast_random());
            e->msgstate = -1;
            e->amaflags = amaflags;
            ast_format_cap_append_from_cap(e->cap, global_capability, AST_MEDIA_TYPE_UNKNOWN);
            e->parent = gw;
            e->ncs = ncs;
            e->dtmfmode = dtmfmode;
            if (!ep_reload && e->sub && e->sub->rtp) {
               e->dtmfmode |= MGCP_DTMF_INBAND;
            }
            e->adsi = adsi;
            e->type = TYPE_LINE;
            e->immediate = immediate;
            e->callgroup=cur_callergroup;
            e->pickupgroup=cur_pickupgroup;
            e->callreturn = callreturn;
            e->cancallforward = cancallforward;
            e->singlepath = singlepath;
            e->directmedia = directmedia;
            e->callwaiting = callwaiting;
            e->hascallwaiting = callwaiting;
            e->slowsequence = slowsequence;
            e->transfer = transfer;
            e->threewaycalling = threewaycalling;
            e->onhooktime = time(NULL);
            /* ASSUME we're onhook */
            e->hookstate = MGCP_ONHOOK;
            e->chanvars = copy_vars(chanvars);
            if (!ep_reload) {
               /*snprintf(txident, sizeof(txident), "%08lx", (unsigned long)ast_random());*/
               for (i = 0; i < MAX_SUBS; i++) {
                  sub = ast_calloc(1, sizeof(*sub));
                  if (sub) {
                     ast_verb(3, "Allocating subchannel '%d' on %s@%s\n", i, e->name, gw->name);
                     ast_mutex_init(&sub->lock);
                     ast_mutex_init(&sub->cx_queue_lock);
                     sub->parent = e;
                     sub->id = i;
                     snprintf(sub->txident, sizeof(sub->txident), "%08lx", (unsigned long)ast_random());
                     /*stnrcpy(sub->txident, txident, sizeof(sub->txident) - 1);*/
                     sub->cxmode = MGCP_CX_INACTIVE;
                     sub->nat = nat;
                     sub->gate = NULL;
                     sub->sdpsent = 0;
                     sub->next = e->sub;
                     e->sub = sub;
                  } else {
                     /* XXX Should find a way to clean up our memory */
                     ast_log(LOG_WARNING, "Out of memory allocating subchannel\n");
                     return NULL;
                  }
               }
               /* Make out subs a circular linked list so we can always sping through the whole bunch */
               /* find the end of the list */
               for (sub = e->sub; sub && sub->next; sub = sub->next);
               /* set the last sub->next to the first sub */
               sub->next = e->sub;

               e->next = gw->endpoints;
               gw->endpoints = e;
            }
         }
      } else if (!strcasecmp(v->name, "trunk") ||
                 !strcasecmp(v->name, "line")) {

         /* locate existing endpoint */
         for (e = gw->endpoints; e; e = e->next) {
            if (!strcasecmp(v->value, e->name)) {
               /* endpoint already exists */
               e->delme = 0;
               ep_reload = 1;
               break;
            }
         }

         if (!e) {
            e = ast_calloc(1, sizeof(*e));
            ep_reload = 0;
         }

         if (e) {
            if (!ep_reload) {
               ast_mutex_init(&e->lock);
               ast_mutex_init(&e->rqnt_queue_lock);
               ast_mutex_init(&e->cmd_queue_lock);
               e->cap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
               ast_copy_string(e->name, v->value, sizeof(e->name));
               e->needaudit = 1;
            }
            /* XXX Should we really check for uniqueness?? XXX */
            ast_copy_string(e->accountcode, accountcode, sizeof(e->accountcode));
            ast_copy_string(e->context, context, sizeof(e->context));
            ast_copy_string(e->cid_num, cid_num, sizeof(e->cid_num));
            ast_copy_string(e->cid_name, cid_name, sizeof(e->cid_name));
            ast_copy_string(e->language, language, sizeof(e->language));
            ast_copy_string(e->musicclass, musicclass, sizeof(e->musicclass));
            ast_copy_string(e->mailbox, mailbox, sizeof(e->mailbox));
            ast_copy_string(e->parkinglot, parkinglot, sizeof(e->parkinglot));
            if (!ast_strlen_zero(mailbox)) {
               ast_verb(3, "Setting mailbox '%s' on %s@%s\n", mailbox, gw->name, e->name);
            }
            if (!ep_reload) {
               /* XXX potential issue due to reload */
               e->msgstate = -1;
               e->parent = gw;
            }
            e->amaflags = amaflags;
            ast_format_cap_append_from_cap(e->cap, global_capability, AST_MEDIA_TYPE_UNKNOWN);
            e->dtmfmode = dtmfmode;
            e->ncs = ncs;
            e->pktcgatealloc = pktcgatealloc;
            e->hangupongateremove = hangupongateremove;
            e->adsi = adsi;
            e->type = (!strcasecmp(v->name, "trunk")) ? TYPE_TRUNK : TYPE_LINE;
            e->immediate = immediate;
            e->callgroup=cur_callergroup;
            e->pickupgroup=cur_pickupgroup;
            e->callreturn = callreturn;
            e->cancallforward = cancallforward;
            e->directmedia = directmedia;
            e->singlepath = singlepath;
            e->callwaiting = callwaiting;
            e->hascallwaiting = callwaiting;
            e->slowsequence = slowsequence;
            e->transfer = transfer;
            e->threewaycalling = threewaycalling;

            /* If we already have a valid chanvars, it's not a new endpoint (it's a reload),
               so first, free previous mem
             */
            if (e->chanvars) {
               ast_variables_destroy(e->chanvars);
               e->chanvars = NULL;
            }
            e->chanvars = copy_vars(chanvars);

            if (!ep_reload) {
               e->onhooktime = time(NULL);
               /* ASSUME we're onhook */
               e->hookstate = MGCP_ONHOOK;
               snprintf(e->rqnt_ident, sizeof(e->rqnt_ident), "%08lx", (unsigned long)ast_random());
            }

            for (i = 0, sub = NULL; i < MAX_SUBS; i++) {
               if (!ep_reload) {
                  sub = ast_calloc(1, sizeof(*sub));
               } else {
                  if (!sub) {
                     sub = e->sub;
                  } else {
                     sub = sub->next;
                  }
               }

               if (sub) {
                  if (!ep_reload) {
                     ast_verb(3, "Allocating subchannel '%d' on %s@%s\n", i, e->name, gw->name);
                     ast_mutex_init(&sub->lock);
                     ast_mutex_init(&sub->cx_queue_lock);
                     ast_copy_string(sub->magic, MGCP_SUBCHANNEL_MAGIC, sizeof(sub->magic));
                     sub->parent = e;
                     sub->id = i;
                     snprintf(sub->txident, sizeof(sub->txident), "%08lx", (unsigned long)ast_random());
                     sub->cxmode = MGCP_CX_INACTIVE;
                     sub->next = e->sub;
                     e->sub = sub;
                  }
                  sub->nat = nat;
               } else {
                  /* XXX Should find a way to clean up our memory */
                  ast_log(LOG_WARNING, "Out of memory allocating subchannel\n");
                  return NULL;
               }
            }
            if (!ep_reload) {
               /* Make out subs a circular linked list so we can always sping through the whole bunch */
               /* find the end of the list */
               for (sub = e->sub; sub && sub->next; sub = sub->next);
               /* set the last sub->next to the first sub */
               sub->next = e->sub;

               e->next = gw->endpoints;
               gw->endpoints = e;
            }
         }
      } else if (!strcasecmp(v->name, "name") || !strcasecmp(v->name, "lines")) {
         /* just eliminate realtime warnings */
      } else {
         ast_log(LOG_WARNING, "Don't know keyword '%s' at line %d\n", v->name, v->lineno);
      }
   }
   if (!ntohl(gw->addr.sin_addr.s_addr) && !gw->dynamic) {
      ast_log(LOG_WARNING, "Gateway '%s' lacks IP address and isn't dynamic\n", gw->name);
      if (!gw_reload) {
         ast_mutex_destroy(&gw->msgs_lock);
         ast_free(gw);
      }

      /* Return NULL */
      gw_reload = 1;
   } else {
      gw->defaddr.sin_family = AF_INET;
      gw->addr.sin_family = AF_INET;
      if (gw->defaddr.sin_addr.s_addr && !ntohs(gw->defaddr.sin_port)) {
         gw->defaddr.sin_port = htons(DEFAULT_MGCP_GW_PORT);
      }
      if (gw->addr.sin_addr.s_addr && !ntohs(gw->addr.sin_port)) {
         gw->addr.sin_port = htons(DEFAULT_MGCP_GW_PORT);
      }
      {
         struct ast_sockaddr tmp1, tmp2;
         struct sockaddr_in tmp3 = {0,};

         tmp3.sin_addr = gw->ourip;
         ast_sockaddr_from_sin(&tmp1, &gw->addr);
         ast_sockaddr_from_sin(&tmp2, &tmp3);
         if (gw->addr.sin_addr.s_addr && ast_ouraddrfor(&tmp1, &tmp2)) {
            memcpy(&gw->ourip, &__ourip, sizeof(gw->ourip));
         } else {
            ast_sockaddr_to_sin(&tmp2, &tmp3);
            gw->ourip = tmp3.sin_addr;
         }
      }
   }

   if (chanvars) {
      ast_variables_destroy(chanvars);
      chanvars = NULL;
   }
   return (gw_reload ? NULL : gw);
}

control2str()

static char* control2str ( int  ind )

static

Definition at line 1406 of file chan_mgcp.c.

References AST_CONTROL_ANSWER, AST_CONTROL_BUSY, AST_CONTROL_CONGESTION, AST_CONTROL_FLASH, AST_CONTROL_HANGUP, AST_CONTROL_OFFHOOK, AST_CONTROL_OPTION, AST_CONTROL_RADIO_KEY, AST_CONTROL_RADIO_UNKEY, AST_CONTROL_RING, AST_CONTROL_RINGING, AST_CONTROL_TAKEOFFHOOK, and AST_CONTROL_WINK.

Referenced by mgcp_indicate().

                                  {
   switch (ind) {
   case AST_CONTROL_HANGUP:
      return "Other end has hungup";
   case AST_CONTROL_RING:
      return "Local ring";
   case AST_CONTROL_RINGING:
      return "Remote end is ringing";
   case AST_CONTROL_ANSWER:
      return "Remote end has answered";
   case AST_CONTROL_BUSY:
      return "Remote end is busy";
   case AST_CONTROL_TAKEOFFHOOK:
      return "Make it go off hook";
   case AST_CONTROL_OFFHOOK:
      return "Line is off hook";
   case AST_CONTROL_CONGESTION:
      return "Congestion (circuits busy)";
   case AST_CONTROL_FLASH:
      return "Flash hook";
   case AST_CONTROL_WINK:
      return "Wink";
   case AST_CONTROL_OPTION:
      return "Set a low-level option";
   case AST_CONTROL_RADIO_KEY:
      return "Key Radio";
   case AST_CONTROL_RADIO_UNKEY:
      return "Un-Key Radio";
   }
   return "UNKNOWN";
}

copy_vars()

static struct ast_variable * copy_vars ( struct ast_variable *  src )

static

duplicate a list of channel variables,

Returns

the copy.

Definition at line 4669 of file chan_mgcp.c.

References ast_variable_new, ast_variable::next, NULL, and tmp().

Referenced by build_gateway().

{
   struct ast_variable *res = NULL, *tmp, *v = NULL;

   for (v = src ; v ; v = v->next) {
      if ((tmp = ast_variable_new(v->name, v->value, v->file))) {
         tmp->next = res;
         res = tmp;
      }
   }
   return res;
}

destroy_endpoint()

static void destroy_endpoint ( struct mgcp_endpoint *  e )

static

Definition at line 4539 of file chan_mgcp.c.

References ao2_ref, ast_dsp_free(), ast_free, ast_mutex_destroy, ast_mutex_lock, ast_mutex_unlock, ast_mwi_unsubscribe(), ast_rtp_instance_destroy(), ast_strlen_zero, ast_variables_destroy(), mgcp_endpoint::cap, mgcp_endpoint::chanvars, mgcp_endpoint::cmd_queue_lock, mgcp_subchannel::cxident, mgcp_endpoint::dsp, dump_cmd_queues(), dump_queue(), mgcp_subchannel::gate, cops_gate::gate_open, cops_gate::gate_remove, cops_gate::got_dq_gi, mgcp_subchannel::lock, mgcp_endpoint::lock, mgcp_subchannel::magic, MAX_SUBS, mgcp_queue_hangup(), mgcp_endpoint::mwi_event_sub, mgcp_subchannel::next, NULL, mgcp_endpoint::parent, mgcp_endpoint::rqnt_queue_lock, mgcp_subchannel::rtp, sub, mgcp_endpoint::sub, cops_gate::tech_pvt, and transmit_connection_del().

Referenced by prune_gateways().

{
   struct mgcp_subchannel *sub = e->sub->next, *s;
   int i;

   for (i = 0; i < MAX_SUBS; i++) {
      ast_mutex_lock(&sub->lock);
      if (!ast_strlen_zero(sub->cxident)) {
         transmit_connection_del(sub);
      }
      if (sub->rtp) {
         ast_rtp_instance_destroy(sub->rtp);
         sub->rtp = NULL;
      }
      memset(sub->magic, 0, sizeof(sub->magic));
      mgcp_queue_hangup(sub);
      dump_cmd_queues(NULL, sub);
      if(sub->gate) {
         sub->gate->tech_pvt = NULL;
         sub->gate->got_dq_gi = NULL;
         sub->gate->gate_remove = NULL;
         sub->gate->gate_open = NULL;
      }
      ast_mutex_unlock(&sub->lock);
      sub = sub->next;
   }

   if (e->dsp) {
      ast_dsp_free(e->dsp);
   }

   dump_queue(e->parent, e);
   dump_cmd_queues(e, NULL);

   sub = e->sub;
   for (i = 0; (i < MAX_SUBS) && sub; i++) {
      s = sub;
      sub = sub->next;
      ast_mutex_destroy(&s->lock);
      ast_mutex_destroy(&s->cx_queue_lock);
      ast_free(s);
   }

   if (e->mwi_event_sub) {
      e->mwi_event_sub = ast_mwi_unsubscribe(e->mwi_event_sub);
   }

   if (e->chanvars) {
      ast_variables_destroy(e->chanvars);
      e->chanvars = NULL;
   }

   ast_mutex_destroy(&e->lock);
   ast_mutex_destroy(&e->rqnt_queue_lock);
   ast_mutex_destroy(&e->cmd_queue_lock);
   ao2_ref(e->cap, -1);
   ast_free(e);
}

destroy_gateway()

static void destroy_gateway ( struct mgcp_gateway *  g )

static

Definition at line 4598 of file chan_mgcp.c.

References ast_free, ast_free_ha(), dump_queue(), mgcp_gateway::ha, and NULL.

Referenced by prune_gateways().

{
   if (g->ha)
      ast_free_ha(g->ha);

   dump_queue(g, NULL);

   ast_free(g);
}

do_monitor()

static void* do_monitor ( void *  data )

static

Definition at line 3818 of file chan_mgcp.c.

References ast_free, ast_io_add(), AST_IO_IN, ast_io_wait(), ast_mutex_destroy, ast_mutex_lock, ast_mutex_unlock, ast_sched_runq(), ast_sched_wait(), ast_verb, mgcp_gateway::endpoints, gatelock, gateways, has_voicemail(), MGCP_ONHOOK, mgcp_prune_realtime_gateway(), mgcp_reload_lock, mgcp_reloading, mgcpsock, mgcpsock_read(), mgcpsock_read_id, monlock, mgcp_gateway::msgs_lock, netlock, mgcp_gateway::next, NULL, mgcp_gateway::realtime, reload_config(), transmit_notify_request(), and TYPE_LINE.

Referenced by restart_monitor().

{
   int res;
   int reloading;
   struct mgcp_gateway *g, *gprev;
   /*struct mgcp_gateway *g;*/
   /*struct mgcp_endpoint *e;*/
   /*time_t thispass = 0, lastpass = 0;*/
   time_t lastrun = 0;

   /* Add an I/O event to our UDP socket */
   if (mgcpsock > -1) {
      mgcpsock_read_id = ast_io_add(io, mgcpsock, mgcpsock_read, AST_IO_IN, NULL);
   }
   /* This thread monitors all the frame relay interfaces which are not yet in use
      (and thus do not have a separate thread) indefinitely */
   /* From here on out, we die whenever asked */
   for (;;) {
      /* Check for a reload request */
      ast_mutex_lock(&mgcp_reload_lock);
      reloading = mgcp_reloading;
      mgcp_reloading = 0;
      ast_mutex_unlock(&mgcp_reload_lock);
      if (reloading) {
         ast_verb(1, "Reloading MGCP\n");
         reload_config(1);
         /* Add an I/O event to our UDP socket */
         if (mgcpsock > -1 && !mgcpsock_read_id) {
            mgcpsock_read_id = ast_io_add(io, mgcpsock, mgcpsock_read, AST_IO_IN, NULL);
         }
      }

      /* Check for interfaces needing to be killed */
      /* Don't let anybody kill us right away.  Nobody should lock the interface list
         and wait for the monitor list, but the other way around is okay. */
      ast_mutex_lock(&monlock);
      /* Lock the network interface */
      ast_mutex_lock(&netlock);

#if 0
      /* XXX THIS IS COMPLETELY HOSED */
      /* The gateway goes into a state of panic */
      /* If the vmwi indicator is sent while it is reseting interfaces */
      lastpass = thispass;
      thispass = time(NULL);
      g = gateways;
      while(g) {
         if (thispass != lastpass) {
            e = g->endpoints;
            while(e) {
               if (e->type == TYPE_LINE) {
                  res = has_voicemail(e);
                  if ((e->msgstate != res) && (e->hookstate == MGCP_ONHOOK) && (!e->rtp)){
                     if (res) {
                        transmit_notify_request(e, "L/vmwi(+)");
                     } else {
                        transmit_notify_request(e, "L/vmwi(-)");
                     }
                     e->msgstate = res;
                     e->onhooktime = thispass;
                  }
               }
               e = e->next;
            }
         }
         g = g->next;
      }
#endif
      /* pruning unused realtime gateways, running in every 60 seconds*/
      if(time(NULL) > (lastrun + 60)) {
         ast_mutex_lock(&gatelock);
         g = gateways;
         gprev = NULL;
         while(g) {
            if(g->realtime) {
               if(mgcp_prune_realtime_gateway(g)) {
                  if(gprev) {
                     gprev->next = g->next;
                  } else {
                     gateways = g->next;
                  }
                  ast_mutex_unlock(&g->msgs_lock);
                  ast_mutex_destroy(&g->msgs_lock);
                  ast_free(g);
               } else {
                  ast_mutex_unlock(&g->msgs_lock);
                  gprev = g;
               }
            } else {
               gprev = g;
            }
            g = g->next;
         }
         ast_mutex_unlock(&gatelock);
         lastrun = time(NULL);
      }
      /* Okay, now that we know what to do, release the network lock */
      ast_mutex_unlock(&netlock);
      /* And from now on, we're okay to be killed, so release the monitor lock as well */
      ast_mutex_unlock(&monlock);
      pthread_testcancel();
      /* Wait for sched or io */
      res = ast_sched_wait(sched);
      /* copied from chan_sip.c */
      if ((res < 0) || (res > 1000)) {
         res = 1000;
      }
      res = ast_io_wait(io, res);
      ast_mutex_lock(&monlock);
      if (res >= 0) {
         ast_sched_runq(sched);
      }
      ast_mutex_unlock(&monlock);
   }
   /* Never reached */
   return NULL;
}

dump_cmd_queues()

static void dump_cmd_queues ( struct mgcp_endpoint *  p, struct mgcp_subchannel *  sub  )

static

dump_cmd_queues: (SC:) cleanup pending commands

Definition at line 2734 of file chan_mgcp.c.

References ast_free, ast_mutex_lock, ast_mutex_unlock, mgcp_endpoint::cmd_queue, mgcp_endpoint::cmd_queue_lock, mgcp_subchannel::cx_queue, mgcp_subchannel::cx_queue_lock, mgcp_request::next, mgcp_subchannel::next, NULL, mgcp_endpoint::rqnt_queue, mgcp_endpoint::rqnt_queue_lock, and mgcp_endpoint::sub.

Referenced by destroy_endpoint(), handle_request(), handle_response(), and unalloc_sub().

{
   struct mgcp_request *t, *q;

   if (p) {
      ast_mutex_lock(&p->rqnt_queue_lock);
      for (q = p->rqnt_queue; q; t = q->next, ast_free(q), q=t);
      p->rqnt_queue = NULL;
      ast_mutex_unlock(&p->rqnt_queue_lock);

      ast_mutex_lock(&p->cmd_queue_lock);
      for (q = p->cmd_queue; q; t = q->next, ast_free(q), q=t);
      p->cmd_queue = NULL;
      ast_mutex_unlock(&p->cmd_queue_lock);

      ast_mutex_lock(&p->sub->cx_queue_lock);
      for (q = p->sub->cx_queue; q; t = q->next, ast_free(q), q=t);
      p->sub->cx_queue = NULL;
      ast_mutex_unlock(&p->sub->cx_queue_lock);

      ast_mutex_lock(&p->sub->next->cx_queue_lock);
      for (q = p->sub->next->cx_queue; q; t = q->next, ast_free(q), q=t);
      p->sub->next->cx_queue = NULL;
      ast_mutex_unlock(&p->sub->next->cx_queue_lock);
   } else if (sub) {
      ast_mutex_lock(&sub->cx_queue_lock);
      for (q = sub->cx_queue; q; t = q->next, ast_free(q), q=t);
      sub->cx_queue = NULL;
      ast_mutex_unlock(&sub->cx_queue_lock);
   }
}

dump_queue()

static void dump_queue ( struct mgcp_gateway *  gw, struct mgcp_endpoint *  p  )

static

Definition at line 570 of file chan_mgcp.c.

References ast_free, ast_log, ast_mutex_lock, ast_mutex_unlock, LOG_NOTICE, mgcp_gateway::msgs, mgcp_gateway::msgs_lock, mgcp_gateway::name, mgcp_message::next, NULL, mgcp_message::owner_ep, and mgcp_message::seqno.

Referenced by destroy_endpoint(), destroy_gateway(), and handle_request().

{
   struct mgcp_message *cur, *q = NULL, *w, *prev;

   ast_mutex_lock(&gw->msgs_lock);
   for (prev = NULL, cur = gw->msgs; cur; prev = cur, cur = cur->next) {
      if (!p || cur->owner_ep == p) {
         if (prev) {
            prev->next = cur->next;
         } else {
            gw->msgs = cur->next;
         }

         ast_log(LOG_NOTICE, "Removing message from %s transaction %u\n",
            gw->name, cur->seqno);

         w = cur;
         if (q) {
            w->next = q;
         } else {
            w->next = NULL;
         }
         q = w;
      }
   }
   ast_mutex_unlock(&gw->msgs_lock);

   while (q) {
      cur = q;
      q = q->next;
      ast_free(cur);
   }
}

find_and_retrans()

static int find_and_retrans ( struct mgcp_subchannel *  sub, struct mgcp_request *  req  )

static

Definition at line 3639 of file chan_mgcp.c.

References answer(), ast_free, mgcp_request::identifier, mgcp_response::next, NULL, mgcp_subchannel::parent, mgcp_endpoint::parent, resend_response(), RESPONSE_TIMEOUT, and mgcp_gateway::responses.

Referenced by mgcpsock_read().

{
   int seqno=0;
   time_t now;
   struct mgcp_response *prev = NULL, *cur, *next, *answer = NULL;
   time(&now);
   if (sscanf(req->identifier, "%30d", &seqno) != 1) {
      seqno = 0;
   }
   for (cur = sub->parent->parent->responses, next = cur ? cur->next : NULL; cur; cur = next, next = cur ? cur->next : NULL) {
      if (now - cur->whensent > RESPONSE_TIMEOUT) {
         /* Delete this entry */
         if (prev)
            prev->next = next;
         else
            sub->parent->parent->responses = next;
         ast_free(cur);
      } else {
         if (seqno == cur->seqno)
            answer = cur;
         prev = cur;
      }
   }
   if (answer) {
      resend_response(sub, answer);
      return 1;
   }
   return 0;
}

find_command()

static struct mgcp_request* find_command ( struct mgcp_endpoint *  p, struct mgcp_subchannel *  sub, struct mgcp_request **  queue, ast_mutex_t *  l, int  ident  )

static

find_command: (SC:) remove command transaction from queue

Definition at line 2768 of file chan_mgcp.c.

References mgcp_gateway::addr, ast_debug, ast_inet_ntoa(), ast_mutex_lock, ast_mutex_unlock, mgcp_postrequest(), mgcp_request::next, NULL, and mgcp_endpoint::parent.

Referenced by handle_response().

{
   struct mgcp_request *prev, *req;

   ast_mutex_lock(l);
   for (prev = NULL, req = *queue; req; prev = req, req = req->next) {
      if (req->trid == ident) {
         /* remove from queue */
         if (!prev)
            *queue = req->next;
         else
            prev->next = req->next;

         /* send next pending command */
         if (*queue) {
            ast_debug(1, "Posting Queued Request:\n%s to %s:%d\n", (*queue)->data,
               ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));

            mgcp_postrequest(p, sub, (*queue)->data, (*queue)->len, (*queue)->trid);
         }
         break;
      }
   }
   ast_mutex_unlock(l);
   return req;
}

find_realtime_gw()

static struct mgcp_gateway* find_realtime_gw ( char *  name, char *  at, struct sockaddr_in *  sin  )

static

Note

This is a fairly odd way of instantiating lines. Instead of each line created by virtue of being in the database (and loaded via ast_load_realtime_multientry), this code forces a specific order with a "lines" entry in the "mgcpgw" record. This has benefits, because as with chan_dahdi, values are inherited across definitions. The downside is that it's not as clear what the values will be simply by looking at a single row in the database, and it's probable that the sanest configuration should have the first column in the "mgcpep" table be "clearvars", with a static value of "all", if any variables are set at all. It may be worth making this assumption explicit in the code in the future, and then just using ast_load_realtime_multientry for the "mgcpep" records.

Definition at line 1686 of file chan_mgcp.c.

References args, AST_APP_ARG, ast_check_realtime(), ast_copy_string(), ast_debug, AST_DECLARE_APP_ARGS, ast_load_realtime(), AST_STANDARD_APP_ARGS, ast_strlen_zero, ast_variables_destroy(), build_gateway(), mgcp_gateway::endpoints, gateways, ast_variable::name, mgcp_endpoint::needaudit, ast_variable::next, mgcp_endpoint::next, mgcp_gateway::next, NULL, mgcp_gateway::realtime, transmit_audit_endpoint(), and ast_variable::value.

Referenced by find_subchannel_and_lock().

{
   struct mgcp_gateway *g = NULL;
   struct ast_variable *mgcpgwconfig = NULL;
   struct ast_variable *gwv, *epname = NULL;
   struct mgcp_endpoint *e;
   char lines[256];
   int i, j;

   ast_debug(1, "*** find Realtime MGCPGW\n");

   if (!(i = ast_check_realtime("mgcpgw")) || !(j = ast_check_realtime("mgcpep"))) {
      return NULL;
   }

   if (ast_strlen_zero(at)) {
      ast_debug(1, "null gw name\n");
      return NULL;
   }

   if (!(mgcpgwconfig = ast_load_realtime("mgcpgw", "name", at, NULL))) {
      return NULL;
   }

   /*!
    * \note This is a fairly odd way of instantiating lines.  Instead of each
    * line created by virtue of being in the database (and loaded via
    * ast_load_realtime_multientry), this code forces a specific order with a
    * "lines" entry in the "mgcpgw" record.  This has benefits, because as with
    * chan_dahdi, values are inherited across definitions.  The downside is
    * that it's not as clear what the values will be simply by looking at a
    * single row in the database, and it's probable that the sanest configuration
    * should have the first column in the "mgcpep" table be "clearvars", with a
    * static value of "all", if any variables are set at all.  It may be worth
    * making this assumption explicit in the code in the future, and then just
    * using ast_load_realtime_multientry for the "mgcpep" records.
    */
   lines[0] = '\0';
   for (gwv = mgcpgwconfig; gwv; gwv = gwv->next) {
      if (!strcasecmp(gwv->name, "lines")) {
         ast_copy_string(lines, gwv->value, sizeof(lines));
         break;
      }
   }
   /* Position gwv at the end of the list */
   for (gwv = gwv && gwv->next ? gwv : mgcpgwconfig; gwv->next; gwv = gwv->next);

   if (!ast_strlen_zero(lines)) {
      AST_DECLARE_APP_ARGS(args,
         AST_APP_ARG(line)[100];
      );
      AST_STANDARD_APP_ARGS(args, lines);
      for (i = 0; i < args.argc; i++) {
         gwv->next = ast_load_realtime("mgcpep", "name", at, "line", args.line[i], NULL);

         /* Remove "line" AND position gwv at the end of the list. */
         for (epname = NULL; gwv->next; gwv = gwv->next) {
            if (!strcasecmp(gwv->next->name, "line")) {
               /* Remove it from the list */
               epname = gwv->next;
               gwv->next = gwv->next->next;
            }
         }
         /* Since "line" instantiates the configuration, we have to move it to the end. */
         if (epname) {
            gwv->next = epname;
            epname->next = NULL;
            gwv = gwv->next;
         }
      }
   }
   for (gwv = mgcpgwconfig; gwv; gwv = gwv->next) {
      ast_debug(1, "MGCP Realtime var: %s => %s\n", gwv->name, gwv->value);
   }

   if (mgcpgwconfig) {
      g = build_gateway(at, mgcpgwconfig);
      ast_variables_destroy(mgcpgwconfig);
   }
   if (g) {
      g->next = gateways;
      g->realtime = 1;
      gateways = g;
      for (e = g->endpoints; e; e = e->next) {
         transmit_audit_endpoint(e);
         e->needaudit = 0;
      }
   }
   return g;
}

find_subchannel_and_lock()

static struct mgcp_subchannel* find_subchannel_and_lock ( char *  name, int  msgid, struct sockaddr_in *  sin  )

static

Definition at line 1777 of file chan_mgcp.c.

References __ourip, mgcp_gateway::addr, ast_copy_string(), ast_debug, ast_inet_ntoa(), ast_log, ast_mutex_lock, ast_mutex_unlock, ast_ouraddrfor(), ast_sockaddr_from_sin, ast_sockaddr_to_sin, ast_verb, c, mgcp_gateway::defaddr, mgcp_gateway::dynamic, mgcp_gateway::endpoints, find_realtime_gw(), gatelock, gateways, mgcp_subchannel::id, mgcp_subchannel::lock, LOG_NOTICE, mgcp_endpoint::name, mgcp_gateway::name, mgcp_endpoint::next, mgcp_gateway::next, NULL, mgcp_gateway::ourip, sub, mgcp_endpoint::sub, and tmp().

Referenced by mgcp_request(), and mgcpsock_read().

{
   struct mgcp_endpoint *p = NULL;
   struct mgcp_subchannel *sub = NULL;
   struct mgcp_gateway *g;
   char tmp[256] = "";
   char *at = NULL, *c;
   int found = 0;
   if (name) {
      ast_copy_string(tmp, name, sizeof(tmp));
      at = strchr(tmp, '@');
      if (!at) {
         ast_log(LOG_NOTICE, "Endpoint '%s' has no at sign!\n", name);
         return NULL;
      }
      *at++ = '\0';
   }
   ast_mutex_lock(&gatelock);
   if (at && (at[0] == '[')) {
      at++;
      c = strrchr(at, ']');
      if (c) {
         *c = '\0';
      }
   }
   for (g = gateways ? gateways : find_realtime_gw(name, at, sin); g; g = g->next ? g->next : find_realtime_gw(name, at, sin)) {
      if ((!name || !strcasecmp(g->name, at)) &&
          (sin || g->addr.sin_addr.s_addr || g->defaddr.sin_addr.s_addr)) {
         /* Found the gateway.  If it's dynamic, save it's address -- now for the endpoint */
         if (sin && g->dynamic && name) {
            if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) ||
               (g->addr.sin_port != sin->sin_port)) {
               memcpy(&g->addr, sin, sizeof(g->addr));
               {
                  struct ast_sockaddr tmp1, tmp2;
                  struct sockaddr_in tmp3 = {0,};

                  tmp3.sin_addr = g->ourip;
                  ast_sockaddr_from_sin(&tmp1, &g->addr);
                  ast_sockaddr_from_sin(&tmp2, &tmp3);
                  if (ast_ouraddrfor(&tmp1, &tmp2)) {
                     memcpy(&g->ourip, &__ourip, sizeof(g->ourip));
                  }
                  ast_sockaddr_to_sin(&tmp2, &tmp3);
                  g->ourip = tmp3.sin_addr;
               }
               ast_verb(3, "Registered MGCP gateway '%s' at %s port %d\n", g->name, ast_inet_ntoa(g->addr.sin_addr), ntohs(g->addr.sin_port));
            }
         /* not dynamic, check if the name matches */
         } else if (name) {
            if (strcasecmp(g->name, at)) {
               continue;
            }
         /* not dynamic, no name, check if the addr matches */
         } else if (!name && sin) {
            if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) ||
                (g->addr.sin_port != sin->sin_port)) {
               continue;
            }
         } else {
            continue;
         }
         for (p = g->endpoints; p; p = p->next) {
            ast_debug(1, "Searching on %s@%s for subchannel\n", p->name, g->name);
            if (msgid) {
               sub = p->sub;
               found = 1;
               break;
            } else if (name && !strcasecmp(p->name, tmp)) {
               ast_debug(1, "Coundn't determine subchannel, assuming current master %s@%s-%d\n",
                  p->name, g->name, p->sub->id);
               sub = p->sub;
               found = 1;
               break;
            }
         }
         if (sub && found) {
            ast_mutex_lock(&sub->lock);
            break;
         }
      }
   }
   ast_mutex_unlock(&gatelock);
   if (!sub) {
      if (name) {
         if (g) {
            ast_log(LOG_NOTICE, "Endpoint '%s' not found on gateway '%s'\n", tmp, at);
         } else {
            ast_log(LOG_NOTICE, "Gateway '%s' (and thus its endpoint '%s') does not exist\n", at, tmp);
         }
      }
   }
   return sub;
}

get_csv()

static char* get_csv ( char *  c, int *  len, char **  next  )

static

get_csv: (SC:) get comma separated value

Definition at line 1662 of file chan_mgcp.c.

References c, and NULL.

Referenced by handle_response().

{
   char *s;

   *next = NULL, *len = 0;
   if (!c) return NULL;

   while (*c && (*c < 33 || *c == ',')) {
      c++;
   }

   s = c;
   while (*c && (*c >= 33 && *c != ',')) {
      c++, (*len)++;
   }
   *next = c;

   if (*len == 0) {
      s = NULL, *next = NULL;
   }

   return s;
}

get_header()

static char* get_header ( struct mgcp_request *  req, char *  name  )

static

Definition at line 1655 of file chan_mgcp.c.

References __get_header().

Referenced by handle_request(), and handle_response().

{
   int start = 0;
   return __get_header(req, name, &start, "");
}

get_sdp()

static char* get_sdp ( struct mgcp_request *  req, char *  name  )

static

Definition at line 1606 of file chan_mgcp.c.

References get_sdp_by_line(), len(), mgcp_request::line, and mgcp_request::lines.

Referenced by process_sdp().

{
   int x;
   int len = strlen(name);
   char *r;

   for (x = 0; x < req->lines; x++) {
      r = get_sdp_by_line(req->line[x], name, len);
      if (r[0] != '\0') return r;
   }
   return "";
}

get_sdp_by_line()

static char* get_sdp_by_line ( char *  line, char *  name, int  nameLen  )

static

Definition at line 1596 of file chan_mgcp.c.

Referenced by get_sdp(), and get_sdp_iterate().

{
   if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') {
      char *r = line + nameLen + 1;
      while (*r && (*r < 33)) ++r;
      return r;
   }
   return "";
}

get_sdp_iterate()

static char* get_sdp_iterate ( int *  iterator, struct mgcp_request *  req, char *  name  )

static

Definition at line 1624 of file chan_mgcp.c.

References get_sdp_by_line(), len(), and mgcp_request::line.

Referenced by process_sdp().

{
   int len = strlen(name);
   char *r;
   while (*iterator < req->lines) {
      r = get_sdp_by_line(req->line[(*iterator)++], name, len);
      if (r[0] != '\0') return r;
   }
   return "";
}

handle_hd_hf()

static void handle_hd_hf ( struct mgcp_subchannel *  sub, char *  ev  )

static

Definition at line 3322 of file chan_mgcp.c.

References AST_CONTROL_ANSWER, ast_hangup(), ast_log, ast_pthread_create_detached, ast_queue_unhold(), AST_STATE_DOWN, AST_STATE_RING, c, mgcp_subchannel::cxmode, errno, has_voicemail(), mgcp_endpoint::hookstate, mgcp_endpoint::immediate, LOG_WARNING, MGCP_CX_SENDRECV, mgcp_new(), MGCP_OFFHOOK, mgcp_queue_control(), mgcp_ss(), mgcp_endpoint::name, mgcp_gateway::name, mgcp_endpoint::ncs, NULL, mgcp_subchannel::outgoing, mgcp_subchannel::owner, mgcp_subchannel::parent, mgcp_endpoint::parent, mgcp_subchannel::rtp, start_rtp(), transmit_modify_request(), and transmit_notify_request().

Referenced by handle_request().

{
   struct mgcp_endpoint *p = sub->parent;
   struct ast_channel *c;
   pthread_t t;

   /* Off hook / answer */
   if (sub->outgoing) {
      /* Answered */
      if (sub->owner) {
         ast_queue_unhold(sub->owner);
         sub->cxmode = MGCP_CX_SENDRECV;
         if (!sub->rtp) {
            start_rtp(sub);
         } else {
            transmit_modify_request(sub);
         }
         /*transmit_notify_request(sub, "aw");*/
         transmit_notify_request(sub, "");
         mgcp_queue_control(sub, AST_CONTROL_ANSWER);
      }
   } else {
      /* Start switch */
      /*sub->cxmode = MGCP_CX_SENDRECV;*/
      if (!sub->owner) {
         if (!sub->rtp) {
            start_rtp(sub);
         } else {
            transmit_modify_request(sub);
         }
         if (p->immediate) {
            /* The channel is immediately up. Start right away */
#ifdef DLINK_BUGGY_FIRMWARE
            transmit_notify_request(sub, "rt");
#else
            transmit_notify_request(sub, p->ncs ? "L/rt" : "G/rt");
#endif
            c = mgcp_new(sub, AST_STATE_RING, NULL, NULL);
            if (!c) {
               ast_log(LOG_WARNING, "Unable to start PBX on channel %s@%s\n", p->name, p->parent->name);
               transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
               ast_hangup(c);
            }
         } else {
            if (has_voicemail(p)) {
               transmit_notify_request(sub, "L/sl");
            } else {
               transmit_notify_request(sub, "L/dl");
            }
            c = mgcp_new(sub, AST_STATE_DOWN, NULL, NULL);
            if (c) {
               if (ast_pthread_create_detached(&t, NULL, mgcp_ss, c)) {
                  ast_log(LOG_WARNING, "Unable to create switch thread: %s\n", strerror(errno));
                  ast_hangup(c);
               }
            } else {
               ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", p->name, p->parent->name);
            }
         }
      } else {
         if (p->hookstate == MGCP_OFFHOOK) {
            ast_log(LOG_WARNING, "Off hook, but already have owner on %s@%s\n", p->name, p->parent->name);
         } else {
            ast_log(LOG_WARNING, "On hook, but already have owner on %s@%s\n", p->name, p->parent->name);
            ast_log(LOG_WARNING, "If we're onhook why are we here trying to handle a hd or hf?\n");
         }
         ast_queue_unhold(sub->owner);
         sub->cxmode = MGCP_CX_SENDRECV;
         if (!sub->rtp) {
            start_rtp(sub);
         } else {
            transmit_modify_request(sub);
         }
         /*transmit_notify_request(sub, "aw");*/
         transmit_notify_request(sub, "");
         /*ast_queue_control(sub->owner, AST_CONTROL_ANSWER);*/
      }
   }
}

handle_mgcp_audit_endpoint()

static char* handle_mgcp_audit_endpoint ( struct ast_cli_entry *  e, int  cmd, struct ast_cli_args *  a  )

static

Definition at line 1060 of file chan_mgcp.c.

References ast_cli_args::argc, ast_cli_args::argv, ast_cli(), ast_mutex_lock, ast_mutex_unlock, ast_strdupa, c, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, mgcp_gateway::endpoints, ast_cli_args::fd, gatelock, gateways, mgcpdebug, mgcp_endpoint::name, mgcp_gateway::name, mgcp_endpoint::next, mgcp_gateway::next, NULL, transmit_audit_endpoint(), and ast_cli_entry::usage.

{
   struct mgcp_gateway  *mg;
   struct mgcp_endpoint *me;
   int found = 0;
   char *ename,*gname, *c;

   switch (cmd) {
   case CLI_INIT:
      e->command = "mgcp audit endpoint";
      e->usage =
         "Usage: mgcp audit endpoint <endpointid>\n"
         "       Lists the capabilities of an endpoint in the MGCP (Media Gateway Control Protocol) subsystem.\n"
         "       mgcp debug MUST be on to see the results of this command.\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }

   if (!mgcpdebug) {
      return CLI_SHOWUSAGE;
   }
   if (a->argc != 4)
      return CLI_SHOWUSAGE;
   /* split the name into parts by null */
   ename = ast_strdupa(a->argv[3]);
   for (gname = ename; *gname; gname++) {
      if (*gname == '@') {
         *gname = 0;
         gname++;
         break;
      }
   }
   if (gname[0] == '[') {
      gname++;
   }
   if ((c = strrchr(gname, ']'))) {
      *c = '\0';
   }
   ast_mutex_lock(&gatelock);
   for (mg = gateways; mg; mg = mg->next) {
      if (!strcasecmp(mg->name, gname)) {
         for (me = mg->endpoints; me; me = me->next) {
            if (!strcasecmp(me->name, ename)) {
               found = 1;
               transmit_audit_endpoint(me);
               break;
            }
         }
         if (found) {
            break;
         }
      }
   }
   if (!found) {
      ast_cli(a->fd, "   << Could not find endpoint >>     ");
   }
   ast_mutex_unlock(&gatelock);
   return CLI_SUCCESS;
}

handle_mgcp_set_debug()

static char* handle_mgcp_set_debug ( struct ast_cli_entry *  e, int  cmd, struct ast_cli_args *  a  )

static

Definition at line 1121 of file chan_mgcp.c.

References ast_cli_args::argc, ast_cli_entry::args, ast_cli_args::argv, ast_cli(), CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, ast_cli_args::fd, mgcpdebug, NULL, and ast_cli_entry::usage.

{
   switch (cmd) {
   case CLI_INIT:
      e->command = "mgcp set debug {on|off}";
      e->usage =
         "Usage: mgcp set debug {on|off}\n"
         "       Enables/Disables dumping of MGCP packets for debugging purposes\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }

   if (a->argc != e->args)
      return CLI_SHOWUSAGE;

   if (!strncasecmp(a->argv[e->args - 1], "on", 2)) {
      mgcpdebug = 1;
      ast_cli(a->fd, "MGCP Debugging Enabled\n");
   } else if (!strncasecmp(a->argv[3], "off", 3)) {
      mgcpdebug = 0;
      ast_cli(a->fd, "MGCP Debugging Disabled\n");
   } else {
      return CLI_SHOWUSAGE;
   }
   return CLI_SUCCESS;
}

handle_mgcp_show_endpoints()

static char* handle_mgcp_show_endpoints ( struct ast_cli_entry *  e, int  cmd, struct ast_cli_args *  a  )

static

Definition at line 1018 of file chan_mgcp.c.

References mgcp_gateway::addr, ast_cli_args::argc, ast_cli(), ast_inet_ntoa(), ast_mutex_lock, ast_mutex_unlock, mgcp_endpoint::chanvars, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, mgcp_endpoint::context, mgcp_gateway::defaddr, mgcp_gateway::dynamic, mgcp_gateway::endpoints, ast_cli_args::fd, gatelock, gateways, ast_variable::name, mgcp_endpoint::name, mgcp_gateway::name, ast_variable::next, mgcp_endpoint::next, mgcp_gateway::next, NULL, mgcp_subchannel::owner, mgcp_gateway::realtime, mgcp_endpoint::sub, ast_cli_entry::usage, and ast_variable::value.

{
   struct mgcp_gateway  *mg;
   struct mgcp_endpoint *me;
   int hasendpoints = 0;
   struct ast_variable * v = NULL;

   switch (cmd) {
   case CLI_INIT:
      e->command = "mgcp show endpoints";
      e->usage =
         "Usage: mgcp show endpoints\n"
         "       Lists all endpoints known to the MGCP (Media Gateway Control Protocol) subsystem.\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }

   if (a->argc != 3) {
      return CLI_SHOWUSAGE;
   }
   ast_mutex_lock(&gatelock);
   for (mg = gateways; mg; mg = mg->next) {
      ast_cli(a->fd, "Gateway '%s' at %s (%s%s)\n", mg->name, mg->addr.sin_addr.s_addr ? ast_inet_ntoa(mg->addr.sin_addr) : ast_inet_ntoa(mg->defaddr.sin_addr), mg->realtime ? "Realtime, " : "", mg->dynamic ? "Dynamic" : "Static");
      for (me = mg->endpoints; me; me = me->next) {
         ast_cli(a->fd, "   -- '%s@%s in '%s' is %s\n", me->name, mg->name, me->context, me->sub->owner ? "active" : "idle");
         if (me->chanvars) {
            ast_cli(a->fd, "  Variables:\n");
            for (v = me->chanvars ; v ; v = v->next) {
               ast_cli(a->fd, "    %s = '%s'\n", v->name, v->value);
            }
         }
         hasendpoints = 1;
      }
      if (!hasendpoints) {
         ast_cli(a->fd, "   << No Endpoints Defined >>     ");
      }
   }
   ast_mutex_unlock(&gatelock);
   return CLI_SUCCESS;
}

handle_request()

static int handle_request ( struct mgcp_subchannel *  sub, struct mgcp_request *  req, struct sockaddr_in *  sin  )

static

Definition at line 3402 of file chan_mgcp.c.

References mgcp_subchannel::alreadygone, ast_debug, AST_FRAME_DTMF, ast_inet_ntoa(), ast_log, ast_mutex_lock, ast_mutex_unlock, ast_queue_hold(), ast_queue_unhold(), AST_STATE_DOWN, AST_STATE_UP, ast_verb, attempt_transfer(), mgcp_endpoint::callwaiting, mgcp_endpoint::curtone, mgcp_subchannel::cxmode, mgcp_endpoint::dtmf_buf, dump_cmd_queues(), dump_queue(), mgcp_gateway::endpoints, ast_frame::frametype, get_header(), handle_hd_hf(), has_voicemail(), mgcp_endpoint::hascallwaiting, mgcp_endpoint::hidecallerid, mgcp_endpoint::hookstate, mgcp_subchannel::id, ast_frame_subclass::integer, mgcp_subchannel::lock, LOG_NOTICE, LOG_WARNING, MGCP_CX_CONF, MGCP_CX_MUTE, MGCP_CX_RECVONLY, MGCP_CX_SENDRECV, MGCP_OFFHOOK, MGCP_ONHOOK, mgcp_queue_frame(), mgcp_queue_hangup(), mgcp_endpoint::name, mgcp_gateway::name, mgcp_endpoint::ncs, mgcp_subchannel::next, mgcp_endpoint::next, NULL, mgcp_subchannel::outgoing, mgcp_subchannel::owner, mgcp_subchannel::parent, mgcp_endpoint::parent, mgcp_subchannel::rtp, ast_frame::src, sub, mgcp_endpoint::sub, ast_frame::subclass, mgcp_endpoint::threewaycalling, mgcp_endpoint::transfer, transmit_audit_endpoint(), transmit_connection_del(), transmit_modify_request(), transmit_notify_request(), transmit_response(), mgcp_request::verb, and mgcp_gateway::wcardep.

Referenced by mgcpsock_read().

{
   char *ev, *s;
   struct ast_frame f = { 0, };
   struct mgcp_endpoint *p = sub->parent;
   struct mgcp_gateway *g = NULL;
   int res;

   ast_debug(1, "Handling request '%s' on %s@%s\n", req->verb, p->name, p->parent->name);
   /* Clear out potential response */
   if (!strcasecmp(req->verb, "RSIP")) {
      /* Test if this RSIP request is just a keepalive */
      if (!strcasecmp( get_header(req, "RM"), "X-keepalive")) {
         ast_verb(3, "Received keepalive request from %s@%s\n", p->name, p->parent->name);
         transmit_response(sub, "200", req, "OK");
      } else {
         dump_queue(p->parent, p);
         dump_cmd_queues(p, NULL);

         if ((strcmp(p->name, p->parent->wcardep) != 0)) {
            ast_verb(3, "Resetting interface %s@%s\n", p->name, p->parent->name);
         }
         /* For RSIP on wildcard we reset all endpoints */
         if (!strcmp(p->name, p->parent->wcardep)) {
            /* Reset all endpoints */
            struct mgcp_endpoint *tmp_ep;

            g = p->parent;
            for (tmp_ep = g->endpoints; tmp_ep; tmp_ep = tmp_ep->next) {
               /*if ((strcmp(tmp_ep->name, "*") != 0) && (strcmp(tmp_ep->name, "aaln/" "*") != 0)) {*/
               if (strcmp(tmp_ep->name, g->wcardep) != 0) {
                  struct mgcp_subchannel *tmp_sub, *first_sub;
                  ast_verb(3, "Resetting interface %s@%s\n", tmp_ep->name, p->parent->name);

                  first_sub = tmp_ep->sub;
                  tmp_sub = tmp_ep->sub;
                  while (tmp_sub) {
                     mgcp_queue_hangup(tmp_sub);
                     tmp_sub = tmp_sub->next;
                     if (tmp_sub == first_sub)
                        break;
                  }
               }
            }
         } else if (sub->owner) {
            mgcp_queue_hangup(sub);
         }
         transmit_response(sub, "200", req, "OK");
         /* We don't send NTFY or AUEP to wildcard ep */
         if (strcmp(p->name, p->parent->wcardep) != 0) {
            transmit_notify_request(sub, "");
            /* Audit endpoint.
             Idea is to prevent lost lines due to race conditions
            */
            transmit_audit_endpoint(p);
         }
      }
   } else if (!strcasecmp(req->verb, "NTFY")) {
      /* Acknowledge and be sure we keep looking for the same things */
      transmit_response(sub, "200", req, "OK");
      /* Notified of an event */
      ev = get_header(req, "O");
      s = strchr(ev, '/');
      if (s) ev = s + 1;
      ast_debug(1, "Endpoint '%s@%s-%d' observed '%s'\n", p->name, p->parent->name, sub->id, ev);
      /* Keep looking for events unless this was a hangup */
      if (strcasecmp(ev, "hu") && strcasecmp(ev, "hd") && strcasecmp(ev, "ping")) {
         transmit_notify_request(sub, p->curtone);
      }
      if (!strcasecmp(ev, "hd")) {
         p->hookstate = MGCP_OFFHOOK;
         sub->cxmode = MGCP_CX_SENDRECV;

         if (p) {
           /* When the endpoint have a Off hook transition we allways
              starts without any previous dtmfs */
           memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
         }

         handle_hd_hf(sub, ev);
      } else if (!strcasecmp(ev, "hf")) {
         /* We can assume we are offhook if we received a hookflash */
         /* First let's just do call wait and ignore threeway */
         /* We're currently in charge */
         if (p->hookstate != MGCP_OFFHOOK) {
            /* Cisco c7940 sends hf even if the phone is onhook */
            /* Thanks to point on IRC for pointing this out */
            return -1;
         }
         /* do not let * conference two down channels */
         if (sub->owner && ast_channel_state(sub->owner) == AST_STATE_DOWN && !sub->next->owner)
            return -1;

         if (p->callwaiting || p->transfer || p->threewaycalling) {
            ast_verb(3, "Swapping %d for %d on %s@%s\n", p->sub->id, p->sub->next->id, p->name, p->parent->name);
            p->sub = p->sub->next;

            /* transfer control to our next subchannel */
            if (!sub->next->owner) {
               /* plave the first call on hold and start up a new call */
               sub->cxmode = MGCP_CX_MUTE;
               ast_verb(3, "MGCP Muting %d on %s@%s\n", sub->id, p->name, p->parent->name);
               transmit_modify_request(sub);
               if (sub->owner) {
                  ast_queue_hold(sub->owner, NULL);
               }
               sub->next->cxmode = MGCP_CX_RECVONLY;
               handle_hd_hf(sub->next, ev);
            } else if (sub->owner && sub->next->owner) {
               /* We've got two active calls lets decide whether or not to conference or just flip flop */
               if ((!sub->outgoing) && (!sub->next->outgoing)) {
                  /* We made both calls lets conference */
                  ast_verb(3, "MGCP Conferencing %d and %d on %s@%s\n",
                        sub->id, sub->next->id, p->name, p->parent->name);
                  sub->cxmode = MGCP_CX_CONF;
                  sub->next->cxmode = MGCP_CX_CONF;
                  ast_queue_unhold(sub->next->owner);
                  transmit_modify_request(sub);
                  transmit_modify_request(sub->next);
               } else {
                  /* Let's flipflop between calls */
                  /* XXX Need to check for state up ??? */
                  /* XXX Need a way to indicate the current call, or maybe the call that's waiting */
                  ast_verb(3, "We didn't make one of the calls FLIPFLOP %d and %d on %s@%s\n",
                        sub->id, sub->next->id, p->name, p->parent->name);
                  sub->cxmode = MGCP_CX_MUTE;
                  ast_verb(3, "MGCP Muting %d on %s@%s\n", sub->id, p->name, p->parent->name);
                  transmit_modify_request(sub);

                  ast_queue_hold(sub->owner, NULL);
                  ast_queue_hold(sub->next->owner, NULL);

                  handle_hd_hf(sub->next, ev);
               }
            } else {
               /* We've most likely lost one of our calls find an active call and bring it up */
               if (sub->owner) {
                  p->sub = sub;
               } else if (sub->next->owner) {
                  p->sub = sub->next;
               } else {
                  /* We seem to have lost both our calls */
                  /* XXX - What do we do now? */
                  return -1;
               }
               ast_queue_unhold(p->sub->owner);
               p->sub->cxmode = MGCP_CX_SENDRECV;
               transmit_modify_request(p->sub);
            }
         } else {
            ast_log(LOG_WARNING, "Callwaiting, call transfer or threeway calling not enabled on endpoint %s@%s\n",
               p->name, p->parent->name);
         }
      } else if (!strcasecmp(ev, "hu")) {
         p->hookstate = MGCP_ONHOOK;
         sub->cxmode = MGCP_CX_RECVONLY;
         ast_debug(1, "MGCP %s@%s Went on hook\n", p->name, p->parent->name);
         /* Do we need to send MDCX before a DLCX ?
         if (sub->rtp) {
            transmit_modify_request(sub);
         }
         */
         if (p->transfer && (sub->owner && sub->next->owner) && ((!sub->outgoing) || (!sub->next->outgoing))) {
            /* We're allowed to transfer, we have two avtive calls and */
            /* we made at least one of the calls.  Let's try and transfer */
            ast_mutex_lock(&p->sub->next->lock);
            res = attempt_transfer(p, sub);
            if (res) {
               ast_log(LOG_WARNING, "Transfer attempt failed\n");
               ast_mutex_unlock(&p->sub->next->lock);
               return -1;
            }
            ast_mutex_unlock(&p->sub->next->lock);
         } else {
            /* Hangup the current call */
            /* If there is another active call, mgcp_hangup will ring the phone with the other call */
            if (sub->owner) {
               sub->alreadygone = 1;
               mgcp_queue_hangup(sub);
            } else {
               ast_verb(3, "MGCP handle_request(%s@%s-%d) ast_channel already destroyed, resending DLCX.\n",
                     p->name, p->parent->name, sub->id);
               /* Instruct the other side to remove the connection since it apparently *
                * still thinks the channel is active. *
                * For Cisco IAD2421 /BAK/ */
               transmit_connection_del(sub);
            }
         }
         if ((p->hookstate == MGCP_ONHOOK) && (!sub->rtp) && (!sub->next->rtp)) {
            p->hidecallerid = 0;
            if (p->hascallwaiting && !p->callwaiting) {
               ast_verb(3, "Enabling call waiting on MGCP/%s@%s-%d\n", p->name, p->parent->name, sub->id);
               p->callwaiting = -1;
            }
            if (has_voicemail(p)) {
               ast_verb(3, "MGCP handle_request(%s@%s) set vmwi(+)\n", p->name, p->parent->name);
               transmit_notify_request(sub, "L/vmwi(+)");
            } else {
               ast_verb(3, "MGCP handle_request(%s@%s) set vmwi(-)\n", p->name, p->parent->name);
               transmit_notify_request(sub, "L/vmwi(-)");
            }
         }
      } else if ((strlen(ev) == 1) &&
            (((ev[0] >= '0') && (ev[0] <= '9')) ||
             ((ev[0] >= 'A') && (ev[0] <= 'D')) ||
              (ev[0] == '*') || (ev[0] == '#'))) {
         if (sub && sub->owner && (ast_channel_state(sub->owner) >=  AST_STATE_UP)) {
            f.frametype = AST_FRAME_DTMF;
            f.subclass.integer = ev[0];
            f.src = "mgcp";
            /* XXX MUST queue this frame to all subs in threeway call if threeway call is active */
            mgcp_queue_frame(sub, &f);
            ast_mutex_lock(&sub->next->lock);
            if (sub->next->owner)
               mgcp_queue_frame(sub->next, &f);
            ast_mutex_unlock(&sub->next->lock);
            if (strstr(p->curtone, (p->ncs ? "wt1" : "wt")) && (ev[0] == 'A')) {
               memset(p->curtone, 0, sizeof(p->curtone));
            }
         } else {
            p->dtmf_buf[strlen(p->dtmf_buf)] = ev[0];
            p->dtmf_buf[strlen(p->dtmf_buf)] = '\0';
         }
      } else if (!strcasecmp(ev, "T")) {
         /* Digit timeout -- unimportant */
      } else if (!strcasecmp(ev, "ping")) {
         /* ping -- unimportant */
      } else {
         ast_log(LOG_NOTICE, "Received unknown event '%s' from %s@%s\n", ev, p->name, p->parent->name);
      }
   } else {
      ast_log(LOG_WARNING, "Unknown verb '%s' received from %s\n", req->verb, ast_inet_ntoa(sin->sin_addr));
      transmit_response(sub, "510", req, "Unknown verb");
   }
   return 0;
}

handle_response()

static void handle_response ( struct mgcp_endpoint *  p, struct mgcp_subchannel *  sub, int  result, unsigned int  ident, struct mgcp_request *  resp  )

static

Definition at line 2797 of file chan_mgcp.c.

References AST_CONTROL_RINGING, ast_copy_string(), ast_free, ast_log, ast_queue_control(), AST_STATE_RINGING, ast_strlen_zero, ast_verb, c, mgcp_request::cmd, mgcp_endpoint::cmd_queue, mgcp_endpoint::cmd_queue_lock, mgcp_subchannel::cx_queue, mgcp_subchannel::cx_queue_lock, mgcp_subchannel::cxident, dump_cmd_queues(), find_command(), get_csv(), get_header(), mgcp_endpoint::hookstate, mgcp_subchannel::id, len(), mgcp_request::lines, LOG_NOTICE, LOG_WARNING, MGCP_CMD_AUEP, MGCP_CMD_CRCX, MGCP_CMD_MDCX, MGCP_OFFHOOK, MGCP_ONHOOK, mgcp_queue_hangup(), mgcp_endpoint::name, mgcp_gateway::name, mgcp_subchannel::next, NULL, mgcp_subchannel::owner, mgcp_endpoint::parent, process_sdp(), mgcp_endpoint::rqnt_queue, mgcp_endpoint::rqnt_queue_lock, mgcp_subchannel::rtp, mgcp_endpoint::slowsequence, start_rtp(), mgcp_endpoint::sub, mgcp_subchannel::tmpdest, transmit_connection_del(), transmit_connection_del_w_params(), transmit_modify_with_sdp(), transmit_notify_request(), and transmit_response().

Referenced by mgcpsock_read(), and retrans_pkt().

{
   char *c;
   struct mgcp_request *req;
   struct mgcp_gateway *gw = p->parent;

   if (result < 200) {
      /* provisional response */
      return;
   }

   if (p->slowsequence)
      req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident);
   else if (sub)
      req = find_command(p, sub, &sub->cx_queue, &sub->cx_queue_lock, ident);
   else if (!(req = find_command(p, sub, &p->rqnt_queue, &p->rqnt_queue_lock, ident)))
      req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident);

   if (!req) {
      ast_verb(3, "No command found on [%s] for transaction %u. Ignoring...\n",
            gw->name, ident);
      return;
   }

   if (p && (result >= 400) && (result <= 599)) {
      switch (result) {
      case 401:
         p->hookstate = MGCP_OFFHOOK;
         break;
      case 402:
         p->hookstate = MGCP_ONHOOK;
         break;
      case 406:
         ast_log(LOG_NOTICE, "Transaction %u timed out\n", ident);
         break;
      case 407:
         ast_log(LOG_NOTICE, "Transaction %u aborted\n", ident);
         break;
      }
      if (sub) {
         if (!sub->cxident[0] && (req->cmd == MGCP_CMD_CRCX)) {
             ast_log(LOG_NOTICE, "DLCX for all connections on %s due to error %d\n", gw->name, result);
             transmit_connection_del(sub);
         }
         if (sub->owner) {
            ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
               result, p->name, p->parent->name, sub ? sub->id:-1);
            mgcp_queue_hangup(sub);
         }
      } else {
         if (p->sub->next->owner) {
            ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
               result, p->name, p->parent->name, sub ? sub->id:-1);
            mgcp_queue_hangup(p->sub);
         }

         if (p->sub->owner) {
            ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n",
               result, p->name, p->parent->name, sub ? sub->id:-1);
            mgcp_queue_hangup(p->sub);
         }

         dump_cmd_queues(p, NULL);
      }
   }

   if (resp) {
      /* responseAck: */
      if (result == 200 && (req->cmd == MGCP_CMD_CRCX || req->cmd == MGCP_CMD_MDCX)) {
            if (sub) {
               transmit_response(sub, "000", resp, "OK");
               if (sub->owner && ast_channel_state(sub->owner) == AST_STATE_RINGING) {
                  ast_queue_control(sub->owner, AST_CONTROL_RINGING);
               }
            }
      }
      if (req->cmd == MGCP_CMD_CRCX) {
         if ((c = get_header(resp, "I"))) {
            if (!ast_strlen_zero(c) && sub) {
               /* if we are hanging up do not process this conn. */
               if (sub->owner) {
                  if (!ast_strlen_zero(sub->cxident)) {
                     if (strcasecmp(c, sub->cxident)) {
                        ast_log(LOG_WARNING, "Subchannel already has a cxident. sub->cxident: %s requested %s\n", sub->cxident, c);
                     }
                  }
                  ast_copy_string(sub->cxident, c, sizeof(sub->cxident));
                  if (sub->tmpdest.sin_addr.s_addr) {
                     transmit_modify_with_sdp(sub, NULL, 0);
                  }
               } else {
                  /* XXX delete this one
                     callid and conn id may already be lost.
                     so the following del conn may have a side effect of
                     cleaning up the next subchannel */
                  transmit_connection_del(sub);
               }
            }
         }
      }

      if (req->cmd == MGCP_CMD_AUEP) {
         /* check stale connection ids */
         if ((c = get_header(resp, "I"))) {
            char *v, *n;
            int len;
            while ((v = get_csv(c, &len, &n))) {
               if (len) {
                  if (strncasecmp(v, p->sub->cxident, len) &&
                      strncasecmp(v, p->sub->next->cxident, len)) {
                     /* connection id not found. delete it */
                     char cxident[80] = "";

                     if (len > (sizeof(cxident) - 1))
                        len = sizeof(cxident) - 1;
                     ast_copy_string(cxident, v, len);
                     ast_verb(3, "Non existing connection id %s on %s@%s \n",
                               cxident, p->name, gw->name);
                     transmit_connection_del_w_params(p, NULL, cxident);
                  }
               }
               c = n;
            }
         }

         /* Try to determine the hookstate returned from an audit endpoint command */
         if ((c = get_header(resp, "ES"))) {
            if (!ast_strlen_zero(c)) {
               if (strstr(c, "hu")) {
                  if (p->hookstate != MGCP_ONHOOK) {
                     /* XXX cleanup if we think we are offhook XXX */
                     if ((p->sub->owner || p->sub->next->owner ) &&
                         p->hookstate == MGCP_OFFHOOK)
                        mgcp_queue_hangup(sub);
                     p->hookstate = MGCP_ONHOOK;

                     /* update the requested events according to the new hookstate */
                     transmit_notify_request(p->sub, "");

                     ast_verb(3, "Setting hookstate of %s@%s to ONHOOK\n", p->name, gw->name);
                     }
               } else if (strstr(c, "hd")) {
                  if (p->hookstate != MGCP_OFFHOOK) {
                     p->hookstate = MGCP_OFFHOOK;

                     /* update the requested events according to the new hookstate */
                     transmit_notify_request(p->sub, "");

                     ast_verb(3, "Setting hookstate of %s@%s to OFFHOOK\n", p->name, gw->name);
                     }
                  }
               }
            }
         }

      if (resp && resp->lines) {
         /* do not process sdp if we are hanging up. this may be a late response */
         if (sub && sub->owner) {
            if (!sub->rtp)
               start_rtp(sub);
            if (sub->rtp)
               process_sdp(sub, resp);
         }
      }
   }

   ast_free(req);
}

has_voicemail()

static int has_voicemail ( struct mgcp_endpoint *  p )

static

Definition at line 490 of file chan_mgcp.c.

References ao2_cleanup, ast_app_has_voicemail(), ast_mwi_state_cache(), ast_mwi_state_type(), mgcp_endpoint::mailbox, ast_mwi_state::new_msgs, NULL, RAII_VAR, stasis_cache_get(), and stasis_message_data().

Referenced by do_monitor(), handle_hd_hf(), handle_request(), mgcp_hangup(), and mgcp_request().

{
   int new_msgs;
   RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);

   msg = stasis_cache_get(ast_mwi_state_cache(), ast_mwi_state_type(), p->mailbox);
   if (msg) {
      struct ast_mwi_state *mwi_state = stasis_message_data(msg);
      new_msgs = mwi_state->new_msgs;
   } else {
      new_msgs = ast_app_has_voicemail(p->mailbox, NULL);
   }

   return new_msgs;
}

init_req()

static int init_req ( struct mgcp_endpoint *  p, struct mgcp_request *  req, char *  verb, unsigned int  oseq  )

static

Definition at line 2128 of file chan_mgcp.c.

References ast_log, mgcp_request::data, mgcp_request::header, mgcp_request::headers, mgcp_gateway::isnamedottedip, mgcp_request::len, LOG_WARNING, MGCP_MAX_HEADERS, mgcp_endpoint::name, mgcp_gateway::name, mgcp_endpoint::ncs, and mgcp_endpoint::parent.

Referenced by reqprep().

{
   /* Initialize a response */
   if (req->headers || req->len) {
      ast_log(LOG_WARNING, "Request already initialized?!?\n");
      return -1;
   }
   req->header[req->headers] = req->data + req->len;
   /* check if we need brackets around the gw name */
   if (p->parent->isnamedottedip) {
      snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %u %s@[%s] MGCP 1.0%s\r\n", verb, oseq, p->name, p->parent->name, p->ncs ? " NCS 1.0" : "");
   } else {
+     snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %u %s@%s MGCP 1.0%s\r\n", verb, oseq, p->name, p->parent->name, p->ncs ? " NCS 1.0" : "");
   }
   req->len += strlen(req->header[req->headers]);
   if (req->headers < MGCP_MAX_HEADERS) {
      req->headers++;
   } else {
      ast_log(LOG_WARNING, "Out of header space\n");
   }
   return 0;
}

init_resp()

static int init_resp ( struct mgcp_request *  req, char *  resp, struct mgcp_request *  orig, char *  resprest  )

static

Definition at line 2110 of file chan_mgcp.c.

References ast_log, mgcp_request::data, mgcp_request::header, mgcp_request::headers, mgcp_request::identifier, mgcp_request::len, LOG_WARNING, and MGCP_MAX_HEADERS.

Referenced by respprep().

{
   /* Initialize a response */
   if (req->headers || req->len) {
      ast_log(LOG_WARNING, "Request already initialized?!?\n");
      return -1;
   }
   req->header[req->headers] = req->data + req->len;
   snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %s %s\r\n", resp, orig->identifier, resprest);
   req->len += strlen(req->header[req->headers]);
   if (req->headers < MGCP_MAX_HEADERS) {
      req->headers++;
   } else {
      ast_log(LOG_WARNING, "Out of header space\n");
   }
   return 0;
}

load_module()

static int load_module ( void  )

static

Load the module.

Module loading including tests for configuration or dependencies. This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE, or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails tests return AST_MODULE_LOAD_FAILURE. If the module can not load the configuration file or other non-critical problem return AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.

Definition at line 4856 of file chan_mgcp.c.

References ao2_ref, ast_channel_register(), ast_cli_register_multiple, ast_format_alaw, ast_format_cap_alloc, ast_format_cap_append, AST_FORMAT_CAP_FLAG_DEFAULT, ast_format_ulaw, ast_log, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_rtp_glue_register, ast_sched_context_create(), ast_sched_context_destroy(), ast_channel_tech::capabilities, io_context_create(), io_context_destroy(), LOG_ERROR, LOG_WARNING, reload_config(), and restart_monitor().

Referenced by unload_module().

{
   if (!(global_capability = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT))) {
      return AST_MODULE_LOAD_DECLINE;
   }
   if (!(mgcp_tech.capabilities = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT))) {
      ao2_ref(global_capability, -1);
      return AST_MODULE_LOAD_DECLINE;
   }
   ast_format_cap_append(global_capability, ast_format_ulaw, 0);
   ast_format_cap_append(mgcp_tech.capabilities, ast_format_ulaw, 0);
   ast_format_cap_append(mgcp_tech.capabilities, ast_format_alaw, 0);
   if (!(sched = ast_sched_context_create())) {
      ast_log(LOG_WARNING, "Unable to create schedule context\n");
      ao2_ref(global_capability, -1);
      ao2_ref(mgcp_tech.capabilities, -1);
      return AST_MODULE_LOAD_DECLINE;
   }

   if (!(io = io_context_create())) {
      ast_log(LOG_WARNING, "Unable to create I/O context\n");
      ast_sched_context_destroy(sched);
      ao2_ref(global_capability, -1);
      ao2_ref(mgcp_tech.capabilities, -1);
      return AST_MODULE_LOAD_DECLINE;
   }

   if (reload_config(0)) {
      ao2_ref(global_capability, -1);
      ao2_ref(mgcp_tech.capabilities, -1);
      return AST_MODULE_LOAD_DECLINE;
   }

   /* Make sure we can register our mgcp channel type */
   if (ast_channel_register(&mgcp_tech)) {
      ast_log(LOG_ERROR, "Unable to register channel class 'MGCP'\n");
      io_context_destroy(io);
      ast_sched_context_destroy(sched);
      ao2_ref(global_capability, -1);
      ao2_ref(mgcp_tech.capabilities, -1);
      return AST_MODULE_LOAD_DECLINE;
   }