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asterisk/channels/chan_mgcp.c

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v18.15.1
2023-05-25 18:45:57 +00:00
/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2006, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Implementation of Media Gateway Control Protocol
*
* \author Mark Spencer <markster@digium.com>
*
* \ingroup channel_drivers
*/
/*! \li \ref chan_mgcp.c uses the configuration file \ref mgcp.conf
* \addtogroup configuration_file
*/
/*! \page mgcp.conf mgcp.conf
* \verbinclude mgcp.conf.sample
*/
/*** MODULEINFO
<use type="module">res_pktccops</use>
<support_level>extended</support_level>
<deprecated_in>19</deprecated_in>
<removed_in>21</removed_in>
***/
#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"
/*
* Define to work around buggy dlink MGCP phone firmware which
* appears not to know that "rt" is part of the "G" package.
*/
/* #define DLINK_BUGGY_FIRMWARE */
#define MGCPDUMPER
#define DEFAULT_EXPIRY 120
#define MAX_EXPIRY 3600
#define DIRECTMEDIA 1
#ifndef INADDR_NONE
#define INADDR_NONE (in_addr_t)(-1)
#endif
/*! Global jitterbuffer configuration - by default, jb is disabled
* \note Values shown here match the defaults shown in mgcp.conf.sample */
static struct ast_jb_conf default_jbconf =
{
.flags = 0,
.max_size = 200,
.resync_threshold = 1000,
.impl = "fixed",
.target_extra = 40,
};
static struct ast_jb_conf global_jbconf;
static const char tdesc[] = "Media Gateway Control Protocol (MGCP)";
static const char config[] = "mgcp.conf";
#define MGCP_DTMF_RFC2833 (1 << 0)
#define MGCP_DTMF_INBAND (1 << 1)
#define MGCP_DTMF_HYBRID (1 << 2)
#define DEFAULT_MGCP_GW_PORT 2427 /*!< From RFC 2705 */
#define DEFAULT_MGCP_CA_PORT 2727 /*!< From RFC 2705 */
#define MGCP_MAX_PACKET 1500 /*!< Also from RFC 2543, should sub headers tho */
#define DEFAULT_RETRANS 1000 /*!< How frequently to retransmit */
#define MAX_RETRANS 5 /*!< Try only 5 times for retransmissions */
/*! MGCP rtp stream modes { */
#define MGCP_CX_SENDONLY 0
#define MGCP_CX_RECVONLY 1
#define MGCP_CX_SENDRECV 2
#define MGCP_CX_CONF 3
#define MGCP_CX_CONFERENCE 3
#define MGCP_CX_MUTE 4
#define MGCP_CX_INACTIVE 4
/*! } */
static const char * const mgcp_cxmodes[] = {
"sendonly",
"recvonly",
"sendrecv",
"confrnce",
"inactive"
};
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
};
static char context[AST_MAX_EXTENSION] = "default";
static char language[MAX_LANGUAGE] = "";
static char musicclass[MAX_MUSICCLASS] = "";
static char parkinglot[AST_MAX_CONTEXT];
static char cid_num[AST_MAX_EXTENSION] = "";
static char cid_name[AST_MAX_EXTENSION] = "";
static int dtmfmode = 0;
static int nat = 0;
static int ncs = 0;
static int pktcgatealloc = 0;
static int hangupongateremove = 0;
static ast_group_t cur_callergroup = 0;
static ast_group_t cur_pickupgroup = 0;
static struct {
unsigned int tos;
unsigned int tos_audio;
unsigned int cos;
unsigned int cos_audio;
} qos = { 0, 0, 0, 0 };
static int immediate = 0;
static int callwaiting = 0;
static int callreturn = 0;
static int slowsequence = 0;
static int threewaycalling = 0;
/*! This is for flashhook transfers */
static int transfer = 0;
static int cancallforward = 0;
static int singlepath = 0;
static int directmedia = DIRECTMEDIA;
static char accountcode[AST_MAX_ACCOUNT_CODE] = "";
static char mailbox[AST_MAX_MAILBOX_UNIQUEID];
static int amaflags = 0;
static int adsi = 0;
static unsigned int oseq_global = 0;
AST_MUTEX_DEFINE_STATIC(oseq_lock);
/*! Wait up to 16 seconds for first digit (FXO logic) */
static int firstdigittimeout = 16000;
/*! How long to wait for following digits (FXO logic) */
static int gendigittimeout = 8000;
/*! How long to wait for an extra digit, if there is an ambiguous match */
static int matchdigittimeout = 3000;
/*! Protect the monitoring thread, so only one process can kill or start it, and not
when it's doing something critical. */
AST_MUTEX_DEFINE_STATIC(netlock);
AST_MUTEX_DEFINE_STATIC(monlock);
/*! This is the thread for the monitor which checks for input on the channels
* which are not currently in use.
*/
static pthread_t monitor_thread = AST_PTHREADT_NULL;
static int restart_monitor(void);
static struct ast_format_cap *global_capability;
static int nonCodecCapability = AST_RTP_DTMF;
static char ourhost[MAXHOSTNAMELEN];
static struct in_addr __ourip;
static int ourport;
static struct ast_sched_context *sched;
static struct io_context *io;
/*! The private structures of the mgcp channels are linked for
* selecting outgoing channels
*/
#define MGCP_MAX_HEADERS 64
#define MGCP_MAX_LINES 64
struct mgcp_request {
int len;
char *verb;
char *identifier;
char *endpoint;
char *version;
int headers; /*!< MGCP Headers */
char *header[MGCP_MAX_HEADERS];
int lines; /*!< SDP Content */
char *line[MGCP_MAX_LINES];
char data[MGCP_MAX_PACKET];
int cmd; /*!< int version of verb = command */
unsigned int trid; /*!< int version of identifier = transaction id */
struct mgcp_request *next; /*!< next in the queue */
};
/*! \brief mgcp_message: MGCP message for queuing up */
struct mgcp_message {
struct mgcp_endpoint *owner_ep;
struct mgcp_subchannel *owner_sub;
int retrans;
unsigned long expire;
unsigned int seqno;
int len;
struct mgcp_message *next;
char buf[0];
};
#define RESPONSE_TIMEOUT 30 /*!< in seconds */
struct mgcp_response {
time_t whensent;
int len;
int seqno;
struct mgcp_response *next;
char buf[0];
};
#define MAX_SUBS 2
#define SUB_REAL 0
#define SUB_ALT 1
struct mgcp_subchannel {
/*! 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.
*/
#define MGCP_SUBCHANNEL_MAGIC "!978!"
char magic[6];
ast_mutex_t lock;
int id;
struct ast_channel *owner;
struct mgcp_endpoint *parent;
struct ast_rtp_instance *rtp;
struct sockaddr_in tmpdest;
char txident[80]; /*! \todo FIXME txident is replaced by rqnt_ident in endpoint.
This should be obsoleted */
char cxident[80];
char callid[80];
int cxmode;
struct mgcp_request *cx_queue; /*!< pending CX commands */
ast_mutex_t cx_queue_lock; /*!< CX queue lock */
int nat;
int iseq; /*!< Not used? RTP? */
int outgoing;
int alreadygone;
int sdpsent;
struct cops_gate *gate;
struct mgcp_subchannel *next; /*!< for out circular linked list */
};
#define MGCP_ONHOOK 1
#define MGCP_OFFHOOK 2
#define TYPE_TRUNK 1
#define TYPE_LINE 2
struct mgcp_endpoint {
ast_mutex_t lock;
char name[80];
struct mgcp_subchannel *sub; /*!< Pointer to our current connection, channel and stuff */
char accountcode[AST_MAX_ACCOUNT_CODE];
char exten[AST_MAX_EXTENSION]; /*!< Extension where to start */
char context[AST_MAX_EXTENSION];
char language[MAX_LANGUAGE];
char cid_num[AST_MAX_EXTENSION]; /*!< Caller*ID number */
char cid_name[AST_MAX_EXTENSION]; /*!< Caller*ID name */
char lastcallerid[AST_MAX_EXTENSION]; /*!< Last Caller*ID */
char dtmf_buf[AST_MAX_EXTENSION]; /*!< place to collect digits be */
char call_forward[AST_MAX_EXTENSION]; /*!< Last Caller*ID */
char musicclass[MAX_MUSICCLASS];
char curtone[80]; /*!< Current tone */
char mailbox[AST_MAX_EXTENSION];
char parkinglot[AST_MAX_CONTEXT]; /*!< Parkinglot */
struct ast_mwi_subscriber *mwi_event_sub;
ast_group_t callgroup;
ast_group_t pickupgroup;
int callwaiting;
int hascallwaiting;
int transfer;
int threewaycalling;
int singlepath;
int cancallforward;
int directmedia;
int callreturn;
int dnd; /* How does this affect callwait? Do we just deny a mgcp_request if we're dnd? */
int hascallerid;
int hidecallerid;
int dtmfmode;
int amaflags;
int ncs;
int pktcgatealloc;
int hangupongateremove;
int type;
int slowsequence; /*!< MS: Sequence the endpoint as a whole */
int group;
int iseq; /*!< Not used? */
int lastout; /*!< tracking this on the subchannels. Is it needed here? */
int needdestroy; /*!< Not used? */
struct ast_format_cap *cap;
int nonCodecCapability;
int onhooktime;
int msgstate; /*!< voicemail message state */
int immediate;
int hookstate;
int adsi;
char rqnt_ident[80]; /*!< request identifier */
struct mgcp_request *rqnt_queue; /*!< pending RQNT commands */
ast_mutex_t rqnt_queue_lock;
struct mgcp_request *cmd_queue; /*!< pending commands other than RQNT */
ast_mutex_t cmd_queue_lock;
int delme; /*!< needed for reload */
int needaudit; /*!< needed for reload */
struct ast_dsp *dsp; /*!< XXX Should there be a dsp/subchannel? XXX */
/* owner is tracked on the subchannels, and the *sub indicates whos in charge */
/* struct ast_channel *owner; */
/* struct ast_rtp *rtp; */
/* struct sockaddr_in tmpdest; */
/* message go the endpoint and not the channel so they stay here */
struct ast_variable *chanvars; /*!< Variables to set for channel created by user */
struct mgcp_endpoint *next;
struct mgcp_gateway *parent;
};
static struct mgcp_gateway {
/* A gateway containing one or more endpoints */
char name[80];
int isnamedottedip; /*!< is the name FQDN or dotted ip */
struct sockaddr_in addr;
struct sockaddr_in defaddr;
struct in_addr ourip;
int dynamic;
int expire; /*!< XXX Should we ever expire dynamic registrations? XXX */
struct mgcp_endpoint *endpoints;
struct ast_ha *ha;
/* obsolete
time_t lastouttime;
int lastout;
int messagepending;
*/
/* Wildcard endpoint name */
char wcardep[30];
struct mgcp_message *msgs; /*!< gw msg queue */
ast_mutex_t msgs_lock; /*!< queue lock */
int retransid; /*!< retrans timer id */
int delme; /*!< needed for reload */
int realtime;
struct mgcp_response *responses;
struct mgcp_gateway *next;
} *gateways = NULL;
AST_MUTEX_DEFINE_STATIC(mgcp_reload_lock);
static int mgcp_reloading = 0;
/*! \brief gatelock: mutex for gateway/endpoint lists */
AST_MUTEX_DEFINE_STATIC(gatelock);
static int mgcpsock = -1;
static struct sockaddr_in bindaddr;
static void mgcp_set_owner(struct mgcp_subchannel *sub, struct ast_channel *chan);
static struct ast_frame *mgcp_read(struct ast_channel *ast);
static int transmit_response(struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest);
static int transmit_notify_request(struct mgcp_subchannel *sub, char *tone);
static int transmit_modify_request(struct mgcp_subchannel *sub);
static int transmit_connect(struct mgcp_subchannel *sub);
static int transmit_notify_request_with_callerid(struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername);
static int transmit_modify_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp, const struct ast_format_cap *codecs);
static int transmit_connection_del(struct mgcp_subchannel *sub);
static int transmit_audit_endpoint(struct mgcp_endpoint *p);
static void start_rtp(struct mgcp_subchannel *sub);
static void handle_response(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
int result, unsigned int ident, struct mgcp_request *resp);
static void dump_cmd_queues(struct mgcp_endpoint *p, struct mgcp_subchannel *sub);
static char *mgcp_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a);
static int reload_config(int reload);
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 int mgcp_call(struct ast_channel *ast, const char *dest, int timeout);
static int mgcp_hangup(struct ast_channel *ast);
static int mgcp_answer(struct ast_channel *ast);
static struct ast_frame *mgcp_read(struct ast_channel *ast);
static int mgcp_write(struct ast_channel *ast, struct ast_frame *frame);
static int mgcp_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen);
static int mgcp_fixup(struct ast_channel *oldchan, struct ast_channel *newchan);
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 int mgcp_devicestate(const char *data);
static void add_header_offhook(struct mgcp_subchannel *sub, struct mgcp_request *resp, char *tone);
static int transmit_connect_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp);
static struct mgcp_gateway *build_gateway(char *cat, struct ast_variable *v);
static int mgcp_alloc_pktcgate(struct mgcp_subchannel *sub);
static int acf_channel_read(struct ast_channel *chan, const char *funcname, char *preparse, char *buf, size_t buflen);
static struct ast_variable *add_var(const char *buf, struct ast_variable *list);
static struct ast_variable *copy_vars(struct ast_variable *src);
static struct ast_channel_tech mgcp_tech = {
.type = "MGCP",
.description = tdesc,
.properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER,
.requester = mgcp_request,
.devicestate = mgcp_devicestate,
.call = mgcp_call,
.hangup = mgcp_hangup,
.answer = mgcp_answer,
.read = mgcp_read,
.write = mgcp_write,
.indicate = mgcp_indicate,
.fixup = mgcp_fixup,
.send_digit_begin = mgcp_senddigit_begin,
.send_digit_end = mgcp_senddigit_end,
.func_channel_read = acf_channel_read,
};
static int has_voicemail(struct mgcp_endpoint *p)
{
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;
}
static int unalloc_sub(struct mgcp_subchannel *sub)
{
struct mgcp_endpoint *p = sub->parent;
if (p->sub == sub) {
ast_log(LOG_WARNING, "Trying to unalloc the real channel %s@%s?!?\n", p->name, p->parent->name);
return -1;
}
ast_debug(1, "Released sub %d of channel %s@%s\n", sub->id, p->name, p->parent->name);
mgcp_set_owner(sub, NULL);
if (!ast_strlen_zero(sub->cxident)) {
transmit_connection_del(sub);
}
sub->cxident[0] = '\0';
sub->callid[0] = '\0';
sub->cxmode = MGCP_CX_INACTIVE;
sub->outgoing = 0;
sub->alreadygone = 0;
memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
if (sub->rtp) {
ast_rtp_instance_destroy(sub->rtp);
sub->rtp = NULL;
}
dump_cmd_queues(NULL, sub);
return 0;
}
/* modified for new transport mechanism */
static int __mgcp_xmit(struct mgcp_gateway *gw, char *data, int len)
{
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;
}
static int resend_response(struct mgcp_subchannel *sub, struct mgcp_response *resp)
{
struct mgcp_endpoint *p = sub->parent;
int res;
ast_debug(1, "Retransmitting:\n%s\n to %s:%d\n", resp->buf, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
res = __mgcp_xmit(p->parent, resp->buf, resp->len);
if (res > 0)
res = 0;
return res;
}
static int send_response(struct mgcp_subchannel *sub, struct mgcp_request *req)
{
struct mgcp_endpoint *p = sub->parent;
int res;
ast_debug(1, "Transmitting:\n%s\n to %s:%d\n", req->data, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
res = __mgcp_xmit(p->parent, req->data, req->len);
if (res > 0)
res = 0;
return res;
}
/* modified for new transport framework */
static void dump_queue(struct mgcp_gateway *gw, struct mgcp_endpoint *p)
{
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);
}
}
static void mgcp_queue_frame(struct mgcp_subchannel *sub, struct ast_frame *f)
{
for (;;) {
if (sub->owner) {
if (!ast_channel_trylock(sub->owner)) {
ast_queue_frame(sub->owner, f);
ast_channel_unlock(sub->owner);
break;
} else {
DEADLOCK_AVOIDANCE(&sub->lock);
}
} else {
break;
}
}
}
static void mgcp_queue_hangup(struct mgcp_subchannel *sub)
{
for (;;) {
if (sub->owner) {
if (!ast_channel_trylock(sub->owner)) {
ast_queue_hangup(sub->owner);
ast_channel_unlock(sub->owner);
break;
} else {
DEADLOCK_AVOIDANCE(&sub->lock);
}
} else {
break;
}
}
}
static void mgcp_queue_control(struct mgcp_subchannel *sub, int control)
{
struct ast_frame f = { AST_FRAME_CONTROL, { control } };
return mgcp_queue_frame(sub, &f);
}
static int retrans_pkt(const void *data)
{
struct mgcp_gateway *gw = (struct mgcp_gateway *)data;
struct mgcp_message *cur, *exq = NULL, *w, *prev;
int res = 0;
/* find out expired msgs */
ast_mutex_lock(&gw->msgs_lock);
for (prev = NULL, cur = gw->msgs; cur; prev = cur, cur = cur->next) {
if (cur->retrans < MAX_RETRANS) {
cur->retrans++;
ast_debug(1, "Retransmitting #%d transaction %u on [%s]\n",
cur->retrans, cur->seqno, gw->name);
__mgcp_xmit(gw, cur->buf, cur->len);
} else {
if (prev)
prev->next = cur->next;
else
gw->msgs = cur->next;
ast_log(LOG_WARNING, "Maximum retries exceeded for transaction %u on [%s]\n",
cur->seqno, gw->name);
w = cur;
if (exq) {
w->next = exq;
} else {
w->next = NULL;
}
exq = w;
}
}
if (!gw->msgs) {
gw->retransid = -1;
res = 0;
} else {
res = 1;
}
ast_mutex_unlock(&gw->msgs_lock);
while (exq) {
cur = exq;
/* time-out transaction */
handle_response(cur->owner_ep, cur->owner_sub, 406, cur->seqno, NULL);
exq = exq->next;
ast_free(cur);
}
return res;
}
/* modified for the new transaction mechanism */
static int mgcp_postrequest(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
char *data, int len, unsigned int seqno)
{
struct mgcp_message *msg;
struct mgcp_message *cur;
struct mgcp_gateway *gw;
struct timeval now;
if (!(msg = ast_malloc(sizeof(*msg) + len))) {
return -1;
}
if (!(gw = ((p && p->parent) ? p->parent : NULL))) {
ast_free(msg);
return -1;
}
msg->owner_sub = sub;
msg->owner_ep = p;
msg->seqno = seqno;
msg->next = NULL;
msg->len = len;
msg->retrans = 0;
memcpy(msg->buf, data, msg->len);
ast_mutex_lock(&gw->msgs_lock);
for (cur = gw->msgs; cur && cur->next; cur = cur->next);
if (cur) {
cur->next = msg;
} else {
gw->msgs = msg;
}
now = ast_tvnow();
msg->expire = now.tv_sec * 1000 + now.tv_usec / 1000 + DEFAULT_RETRANS;
if (gw->retransid == -1)
gw->retransid = ast_sched_add(sched, DEFAULT_RETRANS, retrans_pkt, (void *)gw);
ast_mutex_unlock(&gw->msgs_lock);
__mgcp_xmit(gw, msg->buf, msg->len);
/* XXX Should schedule retransmission XXX */
return 0;
}
/* modified for new transport */
static int send_request(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
struct mgcp_request *req, unsigned int seqno)
{
int res = 0;
struct mgcp_request **queue, *q, *r, *t;
ast_mutex_t *l;
ast_debug(1, "Slow sequence is %d\n", p->slowsequence);
if (p->slowsequence) {
queue = &p->cmd_queue;
l = &p->cmd_queue_lock;
ast_mutex_lock(l);
} else {
switch (req->cmd) {
case MGCP_CMD_DLCX:
queue = &sub->cx_queue;
l = &sub->cx_queue_lock;
ast_mutex_lock(l);
q = sub->cx_queue;
/* delete pending cx cmds */
/* buggy sb5120 */
if (!sub->parent->ncs) {
while (q) {
r = q->next;
ast_free(q);
q = r;
}
*queue = NULL;
}
break;
case MGCP_CMD_CRCX:
case MGCP_CMD_MDCX:
queue = &sub->cx_queue;
l = &sub->cx_queue_lock;
ast_mutex_lock(l);
break;
case MGCP_CMD_RQNT:
queue = &p->rqnt_queue;
l = &p->rqnt_queue_lock;
ast_mutex_lock(l);
break;
default:
queue = &p->cmd_queue;
l = &p->cmd_queue_lock;
ast_mutex_lock(l);
break;
}
}
if (!(r = ast_malloc(sizeof(*r)))) {
ast_log(LOG_WARNING, "Cannot post MGCP request: insufficient memory\n");
ast_mutex_unlock(l);
return -1;
}
memcpy(r, req, sizeof(*r));
if (!(*queue)) {
ast_debug(1, "Posting Request:\n%s to %s:%d\n", req->data,
ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
res = mgcp_postrequest(p, sub, req->data, req->len, seqno);
} else {
ast_debug(1, "Queueing Request:\n%s to %s:%d\n", req->data,
ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port));
}
/* XXX find tail. We could also keep tail in the data struct for faster access */
for (t = *queue; t && t->next; t = t->next);
r->next = NULL;
if (t)
t->next = r;
else
*queue = r;
ast_mutex_unlock(l);
return res;
}
static int mgcp_call(struct ast_channel *ast, const char *dest, int timeout)
{
int res;
struct mgcp_endpoint *p;
struct mgcp_subchannel *sub;
char tone[50] = "";
const char *distinctive_ring = pbx_builtin_getvar_helper(ast, "ALERT_INFO");
ast_debug(3, "MGCP mgcp_call(%s)\n", ast_channel_name(ast));
sub = ast_channel_tech_pvt(ast);
p = sub->parent;
ast_mutex_lock(&sub->lock);
switch (p->hookstate) {
case MGCP_OFFHOOK:
if (!ast_strlen_zero(distinctive_ring)) {
snprintf(tone, sizeof(tone), "L/wt%s", distinctive_ring);
ast_debug(3, "MGCP distinctive callwait %s\n", tone);
} else {
ast_copy_string(tone, (p->ncs ? "L/wt1" : "L/wt"), sizeof(tone));
ast_debug(3, "MGCP normal callwait %s\n", tone);
}
break;
case MGCP_ONHOOK:
default:
if (!ast_strlen_zero(distinctive_ring)) {
snprintf(tone, sizeof(tone), "L/r%s", distinctive_ring);
ast_debug(3, "MGCP distinctive ring %s\n", tone);
} else {
ast_copy_string(tone, "L/rg", sizeof(tone));
ast_debug(3, "MGCP default ring\n");
}
break;
}
if ((ast_channel_state(ast) != AST_STATE_DOWN) && (ast_channel_state(ast) != AST_STATE_RESERVED)) {
ast_log(LOG_WARNING, "mgcp_call called on %s, neither down nor reserved\n", ast_channel_name(ast));
ast_mutex_unlock(&sub->lock);
return -1;
}
res = 0;
sub->outgoing = 1;
sub->cxmode = MGCP_CX_RECVONLY;
ast_setstate(ast, AST_STATE_RINGING);
if (p->type == TYPE_LINE) {
if (!sub->rtp) {
start_rtp(sub);
} else {
transmit_modify_request(sub);
}
if (sub->next->owner && !ast_strlen_zero(sub->next->cxident) && !ast_strlen_zero(sub->next->callid)) {
/* try to prevent a callwait from disturbing the other connection */
sub->next->cxmode = MGCP_CX_RECVONLY;
transmit_modify_request(sub->next);
}
transmit_notify_request_with_callerid(sub, tone,
S_COR(ast_channel_connected(ast)->id.number.valid, ast_channel_connected(ast)->id.number.str, ""),
S_COR(ast_channel_connected(ast)->id.name.valid, ast_channel_connected(ast)->id.name.str, ""));
ast_setstate(ast, AST_STATE_RINGING);
if (sub->next->owner && !ast_strlen_zero(sub->next->cxident) && !ast_strlen_zero(sub->next->callid)) {
/* Put the connection back in sendrecv */
sub->next->cxmode = MGCP_CX_SENDRECV;
transmit_modify_request(sub->next);
}
} else {
ast_log(LOG_NOTICE, "Don't know how to dial on trunks yet\n");
res = -1;
}
ast_mutex_unlock(&sub->lock);
return res;
}
static int mgcp_hangup(struct ast_channel *ast)
{
struct mgcp_subchannel *sub = ast_channel_tech_pvt(ast);
struct mgcp_endpoint *p = sub->parent;
ast_debug(1, "mgcp_hangup(%s)\n", ast_channel_name(ast));
if (!ast_channel_tech_pvt(ast)) {
ast_debug(1, "Asked to hangup channel not connected\n");
return 0;
}
if (strcmp(sub->magic, MGCP_SUBCHANNEL_MAGIC)) {
ast_debug(1, "Invalid magic. MGCP subchannel freed up already.\n");
return 0;
}
ast_mutex_lock(&sub->lock);
ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s\n", ast_channel_name(ast), p->name, p->parent->name);
if ((p->dtmfmode & MGCP_DTMF_INBAND) && p->dsp) {
/* check whether other channel is active. */
if (!sub->next->owner) {
if (p->dtmfmode & MGCP_DTMF_HYBRID) {
p->dtmfmode &= ~MGCP_DTMF_INBAND;
}
ast_debug(2, "MGCP free dsp on %s@%s\n", p->name, p->parent->name);
ast_dsp_free(p->dsp);
p->dsp = NULL;
}
}
mgcp_set_owner(sub, NULL);
/* for deleting gate */
if (p->pktcgatealloc && sub->gate) {
sub->gate->gate_open = NULL;
sub->gate->gate_remove = NULL;
sub->gate->got_dq_gi = NULL;
sub->gate->tech_pvt = NULL;
if (sub->gate->state == GATE_ALLOC_PROGRESS || sub->gate->state == GATE_ALLOCATED) {
ast_pktccops_gate_alloc(GATE_DEL, sub->gate, 0, 0, 0, 0, 0, 0, NULL, NULL);
} else {
sub->gate->deltimer = time(NULL) + 5;
}
sub->gate = NULL;
}
if (!ast_strlen_zero(sub->cxident)) {
transmit_connection_del(sub);
}
sub->cxident[0] = '\0';
if ((sub == p->sub) && sub->next->owner) {
RAII_VAR(struct ast_channel *, bridged, ast_channel_bridge_peer(sub->next->owner), ast_channel_cleanup);
if (p->hookstate == MGCP_OFFHOOK) {
if (sub->next->owner && bridged) {
/* ncs fix! */
transmit_notify_request_with_callerid(p->sub, (p->ncs ? "L/wt1" : "L/wt"),
S_COR(ast_channel_caller(bridged)->id.number.valid, ast_channel_caller(bridged)->id.number.str, ""),
S_COR(ast_channel_caller(bridged)->id.name.valid, ast_channel_caller(bridged)->id.name.str, ""));
}
} else {
/* set our other connection as the primary and swith over to it */
p->sub = sub->next;
p->sub->cxmode = MGCP_CX_RECVONLY;
transmit_modify_request(p->sub);
if (sub->next->owner && bridged) {
transmit_notify_request_with_callerid(p->sub, "L/rg",
S_COR(ast_channel_caller(bridged)->id.number.valid, ast_channel_caller(bridged)->id.number.str, ""),
S_COR(ast_channel_caller(bridged)->id.name.valid, ast_channel_caller(bridged)->id.name.str, ""));
}
}
} else if ((sub == p->sub->next) && p->hookstate == MGCP_OFFHOOK) {
transmit_notify_request(sub, p->ncs ? "" : "L/v");
} else if (p->hookstate == MGCP_OFFHOOK) {
transmit_notify_request(sub, "L/ro");
} else {
transmit_notify_request(sub, "");
}
ast_channel_tech_pvt_set(ast, NULL);
sub->alreadygone = 0;
sub->outgoing = 0;
sub->cxmode = MGCP_CX_INACTIVE;
sub->callid[0] = '\0';
if (p) {
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
}
/* Reset temporary destination */
memset(&sub->tmpdest, 0, sizeof(sub->tmpdest));
if (sub->rtp) {
ast_rtp_instance_destroy(sub->rtp);
sub->rtp = NULL;
}
ast_module_unref(ast_module_info->self);
if ((p->hookstate == MGCP_ONHOOK) && (!sub->next->rtp)) {
p->hidecallerid = 0;
if (p->hascallwaiting && !p->callwaiting) {
ast_verb(3, "Enabling call waiting on %s\n", ast_channel_name(ast));
p->callwaiting = -1;
}
if (has_voicemail(p)) {
ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s set vmwi(+)\n",
ast_channel_name(ast), p->name, p->parent->name);
transmit_notify_request(sub, "L/vmwi(+)");
} else {
ast_debug(3, "MGCP mgcp_hangup(%s) on %s@%s set vmwi(-)\n",
ast_channel_name(ast), p->name, p->parent->name);
transmit_notify_request(sub, "L/vmwi(-)");
}
}
ast_mutex_unlock(&sub->lock);
return 0;
}
static char *handle_mgcp_show_endpoints(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
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;
}
static char *handle_mgcp_audit_endpoint(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
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"
" Debug logging (core set debug on) MUST be on to see the results of this command.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (!DEBUG_ATLEAST(1)) {
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;
}
static struct ast_cli_entry cli_mgcp[] = {
AST_CLI_DEFINE(handle_mgcp_audit_endpoint, "Audit specified MGCP endpoint"),
AST_CLI_DEFINE(handle_mgcp_show_endpoints, "List defined MGCP endpoints"),
AST_CLI_DEFINE(mgcp_reload, "Reload MGCP configuration"),
};
static int mgcp_answer(struct ast_channel *ast)
{
int res = 0;
struct mgcp_subchannel *sub = ast_channel_tech_pvt(ast);
struct mgcp_endpoint *p = sub->parent;
ast_mutex_lock(&sub->lock);
sub->cxmode = MGCP_CX_SENDRECV;
if (!sub->rtp) {
start_rtp(sub);
} else {
transmit_modify_request(sub);
}
ast_verb(3, "MGCP mgcp_answer(%s) on %s@%s-%d\n",
ast_channel_name(ast), p->name, p->parent->name, sub->id);
if (ast_channel_state(ast) != AST_STATE_UP) {
ast_setstate(ast, AST_STATE_UP);
ast_debug(1, "mgcp_answer(%s)\n", ast_channel_name(ast));
transmit_notify_request(sub, "");
transmit_modify_request(sub);
}
ast_mutex_unlock(&sub->lock);
return res;
}
static struct ast_frame *mgcp_rtp_read(struct mgcp_subchannel *sub)
{
/* Retrieve audio/etc from channel. Assumes sub->lock is already held. */
struct ast_frame *f;
f = ast_rtp_instance_read(sub->rtp, 0);
/* Don't send RFC2833 if we're not supposed to */
if (f && (f->frametype == AST_FRAME_DTMF) && !(sub->parent->dtmfmode & MGCP_DTMF_RFC2833))
return &ast_null_frame;
if (sub->owner) {
/* We already hold the channel lock */
if (f->frametype == AST_FRAME_VOICE) {
if (ast_format_cap_iscompatible_format(ast_channel_nativeformats(sub->owner), f->subclass.format) == AST_FORMAT_CMP_NOT_EQUAL) {
struct ast_format_cap *caps;
ast_debug(1, "Oooh, format changed to %s\n", ast_format_get_name(f->subclass.format));
caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
if (caps) {
ast_format_cap_append(caps, f->subclass.format, 0);
ast_channel_nativeformats_set(sub->owner, caps);
ao2_ref(caps, -1);
} else {
return &ast_null_frame;
}
ast_set_read_format(sub->owner, ast_channel_readformat(sub->owner));
ast_set_write_format(sub->owner, ast_channel_writeformat(sub->owner));
}
/* Courtesy fearnor aka alex@pilosoft.com */
if ((sub->parent->dtmfmode & MGCP_DTMF_INBAND) && (sub->parent->dsp)) {
#if 0
ast_log(LOG_NOTICE, "MGCP ast_dsp_process\n");
#endif
f = ast_dsp_process(sub->owner, sub->parent->dsp, f);
}
}
}
return f;
}
static void mgcp_set_owner(struct mgcp_subchannel *sub, struct ast_channel *chan)
{
sub->owner = chan;
if (sub->rtp) {
ast_rtp_instance_set_channel_id(sub->rtp, sub->owner ? ast_channel_uniqueid(chan) : "");
}
}
static struct ast_frame *mgcp_read(struct ast_channel *ast)
{
struct ast_frame *f;
struct mgcp_subchannel *sub = ast_channel_tech_pvt(ast);
ast_mutex_lock(&sub->lock);
f = mgcp_rtp_read(sub);
ast_mutex_unlock(&sub->lock);
return f;
}
static int mgcp_write(struct ast_channel *ast, struct ast_frame *frame)
{
struct mgcp_subchannel *sub = ast_channel_tech_pvt(ast);
int res = 0;
if (frame->frametype != AST_FRAME_VOICE) {
if (frame->frametype == AST_FRAME_IMAGE)
return 0;
else {
ast_log(LOG_WARNING, "Can't send %u type frames with MGCP write\n", frame->frametype);
return 0;
}
} else {
if (ast_format_cap_iscompatible_format(ast_channel_nativeformats(ast), frame->subclass.format) == AST_FORMAT_CMP_NOT_EQUAL) {
struct ast_str *cap_buf = ast_str_alloca(AST_FORMAT_CAP_NAMES_LEN);
ast_log(LOG_WARNING, "Asked to transmit frame type %s, while native formats is %s (read/write = %s/%s)\n",
ast_format_get_name(frame->subclass.format),
ast_format_cap_get_names(ast_channel_nativeformats(ast), &cap_buf),
ast_format_get_name(ast_channel_readformat(ast)),
ast_format_get_name(ast_channel_writeformat(ast)));
/* return -1; */
}
}
if (sub) {
ast_mutex_lock(&sub->lock);
if (!sub->sdpsent && sub->gate) {
if (sub->gate->state == GATE_ALLOCATED) {
ast_debug(1, "GATE ALLOCATED, sending sdp\n");
transmit_modify_with_sdp(sub, NULL, 0);
}
}
if ((sub->parent->sub == sub) || !sub->parent->singlepath) {
if (sub->rtp) {
res = ast_rtp_instance_write(sub->rtp, frame);
}
}
ast_mutex_unlock(&sub->lock);
}
return res;
}
static int mgcp_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
{
struct mgcp_subchannel *sub = ast_channel_tech_pvt(newchan);
ast_mutex_lock(&sub->lock);
ast_log(LOG_NOTICE, "mgcp_fixup(%s, %s)\n", ast_channel_name(oldchan), ast_channel_name(newchan));
if (sub->owner != oldchan) {
ast_mutex_unlock(&sub->lock);
ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, sub->owner);
return -1;
}
mgcp_set_owner(sub, newchan);
ast_mutex_unlock(&sub->lock);
return 0;
}
static int mgcp_senddigit_begin(struct ast_channel *ast, char digit)
{
struct mgcp_subchannel *sub = ast_channel_tech_pvt(ast);
struct mgcp_endpoint *p = sub->parent;
int res = 0;
ast_mutex_lock(&sub->lock);
if (p->dtmfmode & MGCP_DTMF_INBAND || p->dtmfmode & MGCP_DTMF_HYBRID) {
ast_debug(1, "Sending DTMF using inband/hybrid\n");
res = -1; /* Let asterisk play inband indications */
} else if (p->dtmfmode & MGCP_DTMF_RFC2833) {
ast_debug(1, "Sending DTMF using RFC2833\n");
ast_rtp_instance_dtmf_begin(sub->rtp, digit);
} else {
ast_log(LOG_ERROR, "Don't know about DTMF_MODE %d\n", p->dtmfmode);
}
ast_mutex_unlock(&sub->lock);
return res;
}
static int mgcp_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration)
{
struct mgcp_subchannel *sub = ast_channel_tech_pvt(ast);
struct mgcp_endpoint *p = sub->parent;
int res = 0;
char tmp[4];
ast_mutex_lock(&sub->lock);
if (p->dtmfmode & MGCP_DTMF_INBAND || p->dtmfmode & MGCP_DTMF_HYBRID) {
ast_debug(1, "Stopping DTMF using inband/hybrid\n");
res = -1; /* Tell Asterisk to stop inband indications */
} else if (p->dtmfmode & MGCP_DTMF_RFC2833) {
ast_debug(1, "Stopping DTMF using RFC2833\n");
if (sub->parent->ncs) {
tmp[0] = digit;
tmp[1] = '\0';
} else {
tmp[0] = 'D';
tmp[1] = '/';
tmp[2] = digit;
tmp[3] = '\0';
}
transmit_notify_request(sub, tmp);
ast_rtp_instance_dtmf_end(sub->rtp, digit);
} else {
ast_log(LOG_ERROR, "Don't know about DTMF_MODE %d\n", p->dtmfmode);
}
ast_mutex_unlock(&sub->lock);
return res;
}
/*!
* \brief mgcp_devicestate: channel callback for device status monitoring
* \param data tech/resource name of MGCP device to query
*
* Callback for device state management in channel subsystem
* to obtain device status (up/down) of a specific MGCP endpoint
*
* \return device status result (from devicestate.h) AST_DEVICE_INVALID (not available) or AST_DEVICE_UNKNOWN (available but unknown state)
*/
static int mgcp_devicestate(const char *data)
{
struct mgcp_gateway *g;
struct mgcp_endpoint *e = NULL;
char *tmp, *endpt, *gw;
int ret = AST_DEVICE_INVALID;
endpt = ast_strdupa(data);
if ((tmp = strchr(endpt, '@'))) {
*tmp++ = '\0';
gw = tmp;
} else
goto error;
ast_mutex_lock(&gatelock);
for (g = gateways; g; g = g->next) {
if (strcasecmp(g->name, gw) == 0) {
e = g->endpoints;
break;
}
}
if (!e)
goto error;
for (; e; e = e->next) {
if (strcasecmp(e->name, endpt) == 0) {
break;
}
}
if (!e)
goto error;
/*
* As long as the gateway/endpoint is valid, we'll
* assume that the device is available and its state
* can be tracked.
*/
ret = AST_DEVICE_UNKNOWN;
error:
ast_mutex_unlock(&gatelock);
return ret;
}
static char *control2str(int ind) {
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";
}
static int mgcp_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen)
{
struct mgcp_subchannel *sub = ast_channel_tech_pvt(ast);
int res = 0;
ast_debug(3, "MGCP asked to indicate %d '%s' condition on channel %s\n",
ind, control2str(ind), ast_channel_name(ast));
ast_mutex_lock(&sub->lock);
switch(ind) {
case AST_CONTROL_RINGING:
#ifdef DLINK_BUGGY_FIRMWARE
transmit_notify_request(sub, "rt");
#else
if (!sub->sdpsent) { /* will hide the inband progress!!! */
transmit_notify_request(sub, sub->parent->ncs ? "L/rt" : "G/rt");
}
#endif
break;
case AST_CONTROL_BUSY:
transmit_notify_request(sub, "L/bz");
break;
case AST_CONTROL_INCOMPLETE:
/* We do not currently support resetting of the Interdigit Timer, so treat
* Incomplete control frames as a congestion response
*/
case AST_CONTROL_CONGESTION:
transmit_notify_request(sub, sub->parent->ncs ? "L/cg" : "G/cg");
break;
case AST_CONTROL_HOLD:
ast_moh_start(ast, data, NULL);
break;
case AST_CONTROL_UNHOLD:
ast_moh_stop(ast);
break;
case AST_CONTROL_SRCUPDATE:
ast_rtp_instance_update_source(sub->rtp);
break;
case AST_CONTROL_SRCCHANGE:
ast_rtp_instance_change_source(sub->rtp);
break;
case AST_CONTROL_PROGRESS:
case AST_CONTROL_PROCEEDING:
transmit_modify_request(sub);
case -1:
transmit_notify_request(sub, "");
break;
default:
ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", ind);
/* fallthrough */
case AST_CONTROL_PVT_CAUSE_CODE:
res = -1;
}
ast_mutex_unlock(&sub->lock);
return res;
}
static struct ast_channel *mgcp_new(struct mgcp_subchannel *sub, int state, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor)
{
struct ast_format_cap *caps = NULL;
struct ast_channel *tmp;
struct ast_variable *v = NULL;
struct mgcp_endpoint *i = sub->parent;
struct ast_format *tmpfmt;
caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
if (!caps) {
ast_log(LOG_ERROR, "Format capabilities could not be created\n");
return NULL;
}
tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, i->accountcode, i->exten, i->context, assignedids, requestor, i->amaflags, "MGCP/%s@%s-%d", i->name, i->parent->name, sub->id);
if (!tmp) {
ast_log(LOG_WARNING, "Channel could not be created\n");
ao2_ref(caps, -1);
return NULL;
}
ast_channel_stage_snapshot(tmp);
ast_channel_tech_set(tmp, &mgcp_tech);
if (ast_format_cap_count(i->cap)) {
ast_format_cap_append_from_cap(caps, i->cap, AST_MEDIA_TYPE_UNKNOWN);
} else {
ast_format_cap_append_from_cap(caps, global_capability, AST_MEDIA_TYPE_UNKNOWN);
}
ast_channel_nativeformats_set(tmp, caps);
ao2_ref(caps, -1);
if (sub->rtp) {
ast_channel_set_fd(tmp, 0, ast_rtp_instance_fd(sub->rtp, 0));
}
if (i->dtmfmode & (MGCP_DTMF_INBAND | MGCP_DTMF_HYBRID)) {
i->dsp = ast_dsp_new();
ast_dsp_set_features(i->dsp, DSP_FEATURE_DIGIT_DETECT);
/* this is to prevent clipping of dtmf tones during dsp processing */
ast_dsp_set_digitmode(i->dsp, DSP_DIGITMODE_NOQUELCH);
} else {
i->dsp = NULL;
}
if (state == AST_STATE_RING) {
ast_channel_rings_set(tmp, 1);
}
tmpfmt = ast_format_cap_get_format(ast_channel_nativeformats(tmp), 0);
ast_channel_set_writeformat(tmp, tmpfmt);
ast_channel_set_rawwriteformat(tmp, tmpfmt);
ast_channel_set_readformat(tmp, tmpfmt);
ast_channel_set_rawreadformat(tmp, tmpfmt);
ao2_ref(tmpfmt, -1);
ast_channel_tech_pvt_set(tmp, sub);
if (!ast_strlen_zero(i->language))
ast_channel_language_set(tmp, i->language);
if (!ast_strlen_zero(i->accountcode))
ast_channel_accountcode_set(tmp, i->accountcode);
if (i->amaflags)
ast_channel_amaflags_set(tmp, i->amaflags);
mgcp_set_owner(sub, tmp);
ast_module_ref(ast_module_info->self);
ast_channel_callgroup_set(tmp, i->callgroup);
ast_channel_pickupgroup_set(tmp, i->pickupgroup);
ast_channel_call_forward_set(tmp, i->call_forward);
ast_channel_context_set(tmp, i->context);
ast_channel_exten_set(tmp, i->exten);
/* Don't use ast_set_callerid() here because it will
* generate a needless NewCallerID event */
if (!ast_strlen_zero(i->cid_num)) {
ast_channel_caller(tmp)->ani.number.valid = 1;
ast_channel_caller(tmp)->ani.number.str = ast_strdup(i->cid_num);
}
if (!i->adsi) {
ast_channel_adsicpe_set(tmp, AST_ADSI_UNAVAILABLE);
}
ast_channel_priority_set(tmp, 1);
/* Set channel variables for this call from configuration */
for (v = i->chanvars ; v ; v = v->next) {
char valuebuf[1024];
pbx_builtin_setvar_helper(tmp, v->name, ast_get_encoded_str(v->value, valuebuf, sizeof(valuebuf)));
}
if (sub->rtp) {
ast_jb_configure(tmp, &global_jbconf);
}
ast_channel_stage_snapshot_done(tmp);
ast_channel_unlock(tmp);
if (state != AST_STATE_DOWN) {
if (ast_pbx_start(tmp)) {
ast_log(LOG_WARNING, "Unable to start PBX on %s\n", ast_channel_name(tmp));
ast_hangup(tmp);
tmp = NULL;
}
}
ast_verb(3, "MGCP mgcp_new(%s) created in state: %s\n",
ast_channel_name(tmp), ast_state2str(state));
return tmp;
}
static char *get_sdp_by_line(char* line, char *name, int nameLen)
{
if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') {
char *r = line + nameLen + 1;
while (*r && (*r < 33)) ++r;
return r;
}
return "";
}
static char *get_sdp(struct mgcp_request *req, char *name)
{
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 "";
}
static void sdpLineNum_iterator_init(int *iterator)
{
*iterator = 0;
}
static char *get_sdp_iterate(int* iterator, struct mgcp_request *req, char *name)
{
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 "";
}
static char *__get_header(struct mgcp_request *req, char *name, int *start, char *def)
{
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;
}
static char *get_header(struct mgcp_request *req, char *name)
{
int start = 0;
return __get_header(req, name, &start, "");
}
/*! \brief get_csv: (SC:) get comma separated value */
static char *get_csv(char *c, int *len, char **next)
{
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;
}
static struct mgcp_gateway *find_realtime_gw(char *name, char *at, struct sockaddr_in *sin)
{
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;
}
static struct mgcp_subchannel *find_subchannel_and_lock(char *name, int msgid, struct sockaddr_in *sin)
{
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;
}
static void parse(struct mgcp_request *req)
{
/* Divide fields by NULL's */
char *c;
int f = 0;
c = req->data;
/* First header starts immediately */
req->header[f] = c;
for (; *c; c++) {
if (*c == '\n') {
/* We've got a new header */
*c = 0;
ast_debug(3, "Header: %s (%d)\n", req->header[f], (int) strlen(req->header[f]));
if (ast_strlen_zero(req->header[f])) {
/* Line by itself means we're now in content */
c++;
break;
}
if (f >= MGCP_MAX_HEADERS - 1) {
ast_log(LOG_WARNING, "Too many MGCP headers...\n");
} else {
f++;
}
req->header[f] = c + 1;
} else if (*c == '\r') {
/* Ignore but eliminate \r's */
*c = 0;
}
}
/* Check for last header */
if (!ast_strlen_zero(req->header[f])) {
f++;
}
req->headers = f;
/* Now we process any mime content */
f = 0;
req->line[f] = c;
for (; *c; c++) {
if (*c == '\n') {
/* We've got a new line */
*c = 0;
ast_debug(3, "Line: %s (%d)\n", req->line[f], (int) strlen(req->line[f]));
if (f >= MGCP_MAX_LINES - 1) {
ast_log(LOG_WARNING, "Too many SDP lines...\n");
} else {
f++;
}
req->line[f] = c + 1;
} else if (*c == '\r') {
/* Ignore and eliminate \r's */
*c = 0;
}
}
/* Check for last line */
if (!ast_strlen_zero(req->line[f])) {
f++;
}
req->lines = f;
/* Parse up the initial header */
c = req->header[0];
while (*c && *c < 33) c++;
/* First the verb */
req->verb = c;
while (*c && (*c > 32)) c++;
if (*c) {
*c = '\0';
c++;
while (*c && (*c < 33)) c++;
req->identifier = c;
while (*c && (*c > 32)) c++;
if (*c) {
*c = '\0';
c++;
while (*c && (*c < 33)) c++;
req->endpoint = c;
while (*c && (*c > 32)) c++;
if (*c) {
*c = '\0';
c++;
while (*c && (*c < 33)) c++;
req->version = c;
while (*c && (*c > 32)) c++;
while (*c && (*c < 33)) c++;
while (*c && (*c > 32)) c++;
*c = '\0';
}
}
}
ast_debug(1, "Verb: '%s', Identifier: '%s', Endpoint: '%s', Version: '%s'\n",
req->verb, req->identifier, req->endpoint, req->version);
ast_debug(1, "%d headers, %d lines\n", req->headers, req->lines);
if (*c) {
ast_log(LOG_WARNING, "Odd content, extra stuff left over ('%s')\n", c);
}
}
static int process_sdp(struct mgcp_subchannel *sub, struct mgcp_request *req)
{
char *m;
char *c;
char *a;
char host[258];
int len = 0;
int portno;
struct ast_format_cap *peercap;
int peerNonCodecCapability;
struct ast_sockaddr addr = { {0,} };
char *codecs;
int codec, codec_count=0;
int iterator;
struct mgcp_endpoint *p = sub->parent;
struct ast_str *global_buf = ast_str_alloca(AST_FORMAT_CAP_NAMES_LEN);
struct ast_str *peer_buf = ast_str_alloca(AST_FORMAT_CAP_NAMES_LEN);
struct ast_str *pvt_buf = ast_str_alloca(AST_FORMAT_CAP_NAMES_LEN);
/* Get codec and RTP info from SDP */
m = get_sdp(req, "m");
c = get_sdp(req, "c");
if (ast_strlen_zero(m) || ast_strlen_zero(c)) {
ast_log(LOG_WARNING, "Insufficient information for SDP (m = '%s', c = '%s')\n", m, c);
return -1;
}
if (sscanf(c, "IN IP4 %256s", host) != 1) {
ast_log(LOG_WARNING, "Invalid host in c= line, '%s'\n", c);
return -1;
}
/* XXX This could block for a long time, and block the main thread! XXX */
if (ast_sockaddr_resolve_first_af(&addr, host, PARSE_PORT_FORBID, AF_INET)) {
ast_log(LOG_WARNING, "Unable to lookup host in c= line, '%s'\n", c);
return -1;
}
if (sscanf(m, "audio %30d RTP/AVP %n", &portno, &len) != 1 || !len) {
ast_log(LOG_WARNING, "Malformed media stream descriptor: %s\n", m);
return -1;
}
ast_sockaddr_set_port(&addr, portno);
ast_rtp_instance_set_remote_address(sub->rtp, &addr);
ast_debug(3, "Peer RTP is at port %s\n", ast_sockaddr_stringify(&addr));
/* Scan through the RTP payload types specified in a "m=" line: */
codecs = ast_strdupa(m + len);
while (!ast_strlen_zero(codecs)) {
if (sscanf(codecs, "%30d%n", &codec, &len) != 1) {
if (codec_count) {
break;
}
ast_log(LOG_WARNING, "Error in codec string '%s' at '%s'\n", m, codecs);
return -1;
}
ast_rtp_codecs_payloads_set_m_type(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp, codec);
codec_count++;
codecs += len;
}
/* Next, scan through each "a=rtpmap:" line, noting each */
/* specified RTP payload type (with corresponding MIME subtype): */
sdpLineNum_iterator_init(&iterator);
while ((a = get_sdp_iterate(&iterator, req, "a"))[0] != '\0') {
char* mimeSubtype = ast_strdupa(a); /* ensures we have enough space */
if (sscanf(a, "rtpmap: %30d %127[^/]/", &codec, mimeSubtype) != 2)
continue;
/* Note: should really look at the 'freq' and '#chans' params too */
ast_rtp_codecs_payloads_set_rtpmap_type(ast_rtp_instance_get_codecs(sub->rtp), sub->rtp, codec, "audio", mimeSubtype, 0);
}
/* Now gather all of the codecs that were asked for: */
if (!(peercap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT))) {
return -1;
}
ast_rtp_codecs_payload_formats(ast_rtp_instance_get_codecs(sub->rtp), peercap, &peerNonCodecCapability);
ast_format_cap_get_compatible(global_capability, peercap, p->cap);
ast_debug(1, "Capabilities: us - %s, them - %s, combined - %s\n",
ast_format_cap_get_names(global_capability, &global_buf),
ast_format_cap_get_names(peercap, &peer_buf),
ast_format_cap_get_names(p->cap, &pvt_buf));
ao2_ref(peercap, -1);
ast_debug(1, "Non-codec capabilities: us - %d, them - %d, combined - %d\n",
nonCodecCapability, peerNonCodecCapability, p->nonCodecCapability);
if (!ast_format_cap_count(p->cap)) {
ast_log(LOG_WARNING, "No compatible codecs!\n");
return -1;
}
return 0;
}
static int add_header(struct mgcp_request *req, const char *var, const char *value)
{
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;
}
static int add_line(struct mgcp_request *req, char *line)
{
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;
}
static int init_resp(struct mgcp_request *req, char *resp, struct mgcp_request *orig, char *resprest)
{
/* 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;
}
static int init_req(struct mgcp_endpoint *p, struct mgcp_request *req, char *verb, unsigned int oseq)
{
/* 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;
}
static int respprep(struct mgcp_request *resp, struct mgcp_endpoint *p, char *msg, struct mgcp_request *req, char *msgrest)
{
memset(resp, 0, sizeof(*resp));
init_resp(resp, msg, req, msgrest);
return 0;
}
static int reqprep(struct mgcp_request *req, struct mgcp_endpoint *p, char *verb)
{
unsigned int oseq;
memset(req, 0, sizeof(struct mgcp_request));
ast_mutex_lock(&oseq_lock);
oseq_global++;
if (oseq_global > 999999999) {
oseq_global = 1;
}
oseq = oseq_global;
ast_mutex_unlock(&oseq_lock);
init_req(p, req, verb, oseq);
return oseq;
}
static int transmit_response(struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest)
{
struct mgcp_request resp;
struct mgcp_endpoint *p = sub->parent;
struct mgcp_response *mgr;
if (!sub) {
return -1;
}
respprep(&resp, p, msg, req, msgrest);
if (!(mgr = ast_calloc(1, sizeof(*mgr) + resp.len + 1))) {
return send_response(sub, &resp);
}
/* Store MGCP response in case we have to retransmit */
sscanf(req->identifier, "%30d", &mgr->seqno);
time(&mgr->whensent);
mgr->len = resp.len;
memcpy(mgr->buf, resp.data, resp.len);
mgr->buf[resp.len] = '\0';
mgr->next = p->parent->responses;
p->parent->responses = mgr;
return send_response(sub, &resp);
}
static int add_sdp(struct mgcp_request *resp, struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
{
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;
}
static int transmit_modify_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp, const struct ast_format_cap *codecs)
{
struct mgcp_request resp;
char local[256];
char tmp[80];
struct mgcp_endpoint *p = sub->parent;
int i;
struct ast_sockaddr sub_tmpdest_tmp;
unsigned int oseq;
if (ast_strlen_zero(sub->cxident) && rtp) {
/* We don't have a CXident yet, store the destination and
wait a bit */
ast_rtp_instance_get_remote_address(rtp, &sub_tmpdest_tmp);
ast_sockaddr_to_sin(&sub_tmpdest_tmp, &sub->tmpdest);
return 0;
}
ast_copy_string(local, "e:on, s:off, p:20", sizeof(local));
for (i = 0; i < ast_format_cap_count(p->cap); i++) {
struct ast_format *format = ast_format_cap_get_format(p->cap, i);
if (ast_format_get_type(format) != AST_MEDIA_TYPE_AUDIO) {
ao2_ref(format, -1);
continue;
}
snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, format, 0, 0));
strncat(local, tmp, sizeof(local) - strlen(local) - 1);
ao2_ref(format, -1);
}
if (sub->gate) {
if (sub->gate->state == GATE_ALLOCATED || sub->gate->state == GATE_OPEN) {
snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
strncat(local, tmp, sizeof(local) - strlen(local) - 1);
sub->sdpsent = 1;
} else {
/* oops wait */
ast_debug(1, "Waiting for opened gate...\n");
sub->sdpsent = 0;
return 0;
}
}
oseq = reqprep(&resp, p, "MDCX");
add_header(&resp, "C", sub->callid);
add_header(&resp, "L", local);
add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
/* X header should not be sent. kept for compatibility */
add_header(&resp, "X", sub->txident);
add_header(&resp, "I", sub->cxident);
/*add_header(&resp, "S", "");*/
add_sdp(&resp, sub, rtp);
/* fill in new fields */
resp.cmd = MGCP_CMD_MDCX;
resp.trid = oseq;
return send_request(p, sub, &resp, oseq);
}
static int transmit_connect_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp_instance *rtp)
{
struct mgcp_request resp;
char local[256];
char tmp[80];
int i;
struct mgcp_endpoint *p = sub->parent;
unsigned int oseq;
ast_debug(3, "Creating connection for %s@%s-%d in cxmode: %s callid: %s\n",
p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
ast_copy_string(local, "e:on, s:off, p:20", sizeof(local));
for (i = 0; i < ast_format_cap_count(p->cap); i++) {
struct ast_format *format = ast_format_cap_get_format(p->cap, i);
if (ast_format_get_type(format) != AST_MEDIA_TYPE_AUDIO) {
ao2_ref(format, -1);
continue;
}
snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, format, 0, 0));
strncat(local, tmp, sizeof(local) - strlen(local) - 1);
ao2_ref(format, -1);
}
if (sub->gate) {
if(sub->gate->state == GATE_ALLOCATED) {
snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
strncat(local, tmp, sizeof(local) - strlen(local) - 1);
}
}
sub->sdpsent = 1;
oseq = reqprep(&resp, p, "CRCX");
add_header(&resp, "C", sub->callid);
add_header(&resp, "L", local);
add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
/* X header should not be sent. kept for compatibility */
add_header(&resp, "X", sub->txident);
/*add_header(&resp, "S", "");*/
add_sdp(&resp, sub, rtp);
/* fill in new fields */
resp.cmd = MGCP_CMD_CRCX;
resp.trid = oseq;
return send_request(p, sub, &resp, oseq);
}
static int mgcp_pktcgate_remove(struct cops_gate *gate)
{
struct mgcp_subchannel *sub = gate->tech_pvt;
if (!sub) {
return 1;
}
ast_mutex_lock(&sub->lock);
ast_debug(1, "Pktc: gate 0x%x deleted\n", gate->gateid);
if (sub->gate->state != GATE_CLOSED && sub->parent->hangupongateremove) {
sub->gate = NULL;
if (sub->owner) {
ast_softhangup(sub->owner, AST_CAUSE_REQUESTED_CHAN_UNAVAIL);
ast_channel_unlock(sub->owner);
}
} else {
sub->gate = NULL;
}
ast_mutex_unlock(&sub->lock);
return 1;
}
static int mgcp_pktcgate_open(struct cops_gate *gate)
{
struct mgcp_subchannel *sub = gate->tech_pvt;
if (!sub) {
return 1;
}
ast_mutex_lock(&sub->lock);
ast_debug(1, "Pktc: gate 0x%x open\n", gate->gateid);
if (!sub->sdpsent) transmit_modify_with_sdp(sub, NULL, 0);
ast_mutex_unlock(&sub->lock);
return 1;
}
static int mgcp_alloc_pktcgate(struct mgcp_subchannel *sub)
{
struct mgcp_endpoint *p = sub->parent;
sub->gate = ast_pktccops_gate_alloc(GATE_SET, NULL, ntohl(p->parent->addr.sin_addr.s_addr),
8, 128000, 232, 0, 0, NULL, &mgcp_pktcgate_remove);
if (!sub->gate) {
return 0;
}
sub->gate->tech_pvt = sub;
sub->gate->gate_open = &mgcp_pktcgate_open;
return 1;
}
static int transmit_connect(struct mgcp_subchannel *sub)
{
struct mgcp_request resp;
int x;
char local[256];
char tmp[80];
struct ast_format *tmpfmt;
struct mgcp_endpoint *p = sub->parent;
unsigned int oseq;
ast_copy_string(local, "p:20, s:off, e:on", sizeof(local));
for (x = 0; x < ast_format_cap_count(p->cap); x++) {
tmpfmt = ast_format_cap_get_format(p->cap, x);
snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, tmpfmt, 0, 0));
strncat(local, tmp, sizeof(local) - strlen(local) - 1);
ao2_ref(tmpfmt, -1);
}
ast_debug(3, "Creating connection for %s@%s-%d in cxmode: %s callid: %s\n",
p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
sub->sdpsent = 0;
oseq = reqprep(&resp, p, "CRCX");
add_header(&resp, "C", sub->callid);
add_header(&resp, "L", local);
add_header(&resp, "M", "inactive");
/* X header should not be sent. kept for compatibility */
add_header(&resp, "X", sub->txident);
/*add_header(&resp, "S", "");*/
/* fill in new fields */
resp.cmd = MGCP_CMD_CRCX;
resp.trid = oseq;
return send_request(p, sub, &resp, oseq);
}
static int transmit_notify_request(struct mgcp_subchannel *sub, char *tone)
{
struct mgcp_request resp;
struct mgcp_endpoint *p = sub->parent;
unsigned int oseq;
ast_debug(3, "MGCP Asked to indicate tone: %s on %s@%s-%d in cxmode: %s\n",
tone, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]);
ast_copy_string(p->curtone, tone, sizeof(p->curtone));
oseq = reqprep(&resp, p, "RQNT");
add_header(&resp, "X", p->rqnt_ident);
switch (p->hookstate) {
case MGCP_ONHOOK:
add_header(&resp, "R", "L/hd(N)");
break;
case MGCP_OFFHOOK:
add_header_offhook(sub, &resp, tone);
break;
}
if (!ast_strlen_zero(tone)) {
add_header(&resp, "S", tone);
}
/* fill in new fields */
resp.cmd = MGCP_CMD_RQNT;
resp.trid = oseq;
return send_request(p, NULL, &resp, oseq);
}
static int transmit_notify_request_with_callerid(struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername)
{
struct mgcp_request resp;
char tone2[256];
char *l, *n;
struct timeval t = ast_tvnow();
struct ast_tm tm;
struct mgcp_endpoint *p = sub->parent;
unsigned int oseq;
ast_localtime(&t, &tm, NULL);
n = callername;
l = callernum;
if (!n)
n = "";
if (!l)
l = "";
/* Keep track of last callerid for blacklist and callreturn */
ast_copy_string(p->lastcallerid, l, sizeof(p->lastcallerid));
snprintf(tone2, sizeof(tone2), "%s,L/ci(%02d/%02d/%02d/%02d,%s,%s)", tone,
tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, l, n);
ast_copy_string(p->curtone, tone, sizeof(p->curtone));
oseq = reqprep(&resp, p, "RQNT");
add_header(&resp, "X", p->rqnt_ident);
switch (p->hookstate) {
case MGCP_ONHOOK:
add_header(&resp, "R", "L/hd(N)");
break;
case MGCP_OFFHOOK:
add_header_offhook(sub, &resp, tone);
break;
}
if (!ast_strlen_zero(tone2)) {
add_header(&resp, "S", tone2);
}
ast_debug(3, "MGCP Asked to indicate tone: %s on %s@%s-%d in cxmode: %s\n",
tone2, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]);
/* fill in new fields */
resp.cmd = MGCP_CMD_RQNT;
resp.trid = oseq;
return send_request(p, NULL, &resp, oseq);
}
static int transmit_modify_request(struct mgcp_subchannel *sub)
{
struct mgcp_request resp;
struct mgcp_endpoint *p = sub->parent;
int i;
int fc = 1;
char local[256];
char tmp[80];
unsigned int oseq;
if (ast_strlen_zero(sub->cxident)) {
/* We don't have a CXident yet, store the destination and
wait a bit */
return 0;
}
ast_debug(3, "Modified %s@%s-%d with new mode: %s on callid: %s\n",
p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
ast_copy_string(local, "", sizeof(local));
for (i = 0; i < ast_format_cap_count(p->cap); i++) {
struct ast_format *format = ast_format_cap_get_format(p->cap, i);
if (p->ncs && !fc) {
ast_format_cap_remove_by_type(p->cap, AST_MEDIA_TYPE_UNKNOWN);
ast_format_cap_append(p->cap, format, 0); /* sb5120e bug */
ao2_ref(format, -1);
break;
} else {
fc = 0;
snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype2(1, format, 0, 0));
}
strncat(local, tmp, sizeof(local) - strlen(local) - 1);
ao2_ref(format, -1);
}
if (!sub->sdpsent) {
if (sub->gate) {
if (sub->gate->state == GATE_ALLOCATED || sub->gate->state == GATE_OPEN) {
snprintf(tmp, sizeof(tmp), ", dq-gi:%x", sub->gate->gateid);
strncat(local, tmp, sizeof(local) - strlen(local) - 1);
} else {
/* we still don't have gateid wait */
return 0;
}
}
}
oseq = reqprep(&resp, p, "MDCX");
add_header(&resp, "C", sub->callid);
if (!sub->sdpsent) {
add_header(&resp, "L", local);
}
add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]);
/* X header should not be sent. kept for compatibility */
add_header(&resp, "X", sub->txident);
add_header(&resp, "I", sub->cxident);
switch (sub->parent->hookstate) {
case MGCP_ONHOOK:
add_header(&resp, "R", "L/hd(N)");
break;
case MGCP_OFFHOOK:
add_header_offhook(sub, &resp, "");
break;
}
if (!sub->sdpsent) {
add_sdp(&resp, sub, NULL);
sub->sdpsent = 1;
}
/* fill in new fields */
resp.cmd = MGCP_CMD_MDCX;
resp.trid = oseq;
return send_request(p, sub, &resp, oseq);
}
static void add_header_offhook(struct mgcp_subchannel *sub, struct mgcp_request *resp, char *tone)
{
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)");
}
}
static int transmit_audit_endpoint(struct mgcp_endpoint *p)
{
struct mgcp_request resp;
unsigned int oseq;
oseq = reqprep(&resp, p, "AUEP");
/* removed unknown param VS */
/*add_header(&resp, "F", "A,R,D,S,X,N,I,T,O,ES,E,MD,M");*/
add_header(&resp, "F", "A");
/* fill in new fields */
resp.cmd = MGCP_CMD_AUEP;
resp.trid = oseq;
return send_request(p, NULL, &resp, oseq);
}
static int transmit_connection_del(struct mgcp_subchannel *sub)
{
struct mgcp_endpoint *p = sub->parent;
struct mgcp_request resp;
unsigned int oseq;
ast_debug(3, "Delete connection %s %s@%s-%d with new mode: %s on callid: %s\n",
sub->cxident, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid);
oseq = reqprep(&resp, p, "DLCX");
/* check if call id is avail */
if (sub->callid[0])
add_header(&resp, "C", sub->callid);
/* X header should not be sent. kept for compatibility */
add_header(&resp, "X", sub->txident);
/* check if cxident is avail */
if (sub->cxident[0])
add_header(&resp, "I", sub->cxident);
/* fill in new fields */
resp.cmd = MGCP_CMD_DLCX;
resp.trid = oseq;
return send_request(p, sub, &resp, oseq);
}
static int transmit_connection_del_w_params(struct mgcp_endpoint *p, char *callid, char *cxident)
{
struct mgcp_request resp;
unsigned int oseq;
ast_debug(3, "Delete connection %s %s@%s on callid: %s\n",
cxident ? cxident : "", p->name, p->parent->name, callid ? callid : "");
oseq = reqprep(&resp, p, "DLCX");
/* check if call id is avail */
if (callid && *callid)
add_header(&resp, "C", callid);
/* check if cxident is avail */
if (cxident && *cxident)
add_header(&resp, "I", cxident);
/* fill in new fields */
resp.cmd = MGCP_CMD_DLCX;
resp.trid = oseq;
return send_request(p, p->sub, &resp, oseq);
}
/*! \brief dump_cmd_queues: (SC:) cleanup pending commands */
static void dump_cmd_queues(struct mgcp_endpoint *p, struct mgcp_subchannel *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);
}
}
/*! \brief find_command: (SC:) remove command transaction from queue */
static struct mgcp_request *find_command(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
struct mgcp_request **queue, ast_mutex_t *l, int ident)
{
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;
}
/* modified for new transport mechanism */
static void handle_response(struct mgcp_endpoint *p, struct mgcp_subchannel *sub,
int result, unsigned int ident, struct mgcp_request *resp)
{
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);
}
static void start_rtp(struct mgcp_subchannel *sub)
{
struct ast_sockaddr bindaddr_tmp;
ast_mutex_lock(&sub->lock);
/* check again to be on the safe side */
if (sub->rtp) {
ast_rtp_instance_destroy(sub->rtp);
sub->rtp = NULL;
}
/* Allocate the RTP now */
ast_sockaddr_from_sin(&bindaddr_tmp, &bindaddr);
sub->rtp = ast_rtp_instance_new("asterisk", sched, &bindaddr_tmp, NULL);
if (sub->rtp && sub->owner)
ast_channel_set_fd(sub->owner, 0, ast_rtp_instance_fd(sub->rtp, 0));
if (sub->rtp) {
ast_rtp_instance_set_qos(sub->rtp, qos.tos_audio, qos.cos_audio, "MGCP RTP");
ast_rtp_instance_set_prop(sub->rtp, AST_RTP_PROPERTY_NAT, sub->nat);
}
/* Make a call*ID */
snprintf(sub->callid, sizeof(sub->callid), "%08lx%s", (unsigned long)ast_random(), sub->txident);
/* Transmit the connection create */
if(!sub->parent->pktcgatealloc) {
transmit_connect_with_sdp(sub, NULL);
} else {
transmit_connect(sub);
sub->gate = NULL;
if(!mgcp_alloc_pktcgate(sub))
mgcp_queue_hangup(sub);
}
ast_mutex_unlock(&sub->lock);
}
static void *mgcp_ss(void *data)
{
struct ast_channel *chan = data;
struct mgcp_subchannel *sub = ast_channel_tech_pvt(chan);
struct mgcp_endpoint *p = sub->parent;
/* char exten[AST_MAX_EXTENSION] = ""; */
int len = 0;
int timeout = firstdigittimeout;
int res= 0;
int getforward = 0;
int loop_pause = 100;
RAII_VAR(struct ast_features_pickup_config *, pickup_cfg, NULL, ao2_cleanup);
const char *pickupexten;
len = strlen(p->dtmf_buf);
ast_channel_lock(chan);
pickup_cfg = ast_get_chan_features_pickup_config(chan);
if (!pickup_cfg) {
ast_log(LOG_ERROR, "Unable to retrieve pickup configuration options. Unable to detect call pickup extension\n");
pickupexten = "";
} else {
pickupexten = ast_strdupa(pickup_cfg->pickupexten);
}
ast_channel_unlock(chan);
while (len < AST_MAX_EXTENSION - 1) {
ast_debug(1, "Dtmf buffer '%s' for '%s@%s'\n", p->dtmf_buf, p->name, p->parent->name);
res = 1; /* Assume that we will get a digit */
while (strlen(p->dtmf_buf) == len) {
ast_safe_sleep(chan, loop_pause);
timeout -= loop_pause;
if (timeout <= 0){
res = 0;
break;
}
res = 1;
}
timeout = 0;
len = strlen(p->dtmf_buf);
if (!ast_ignore_pattern(ast_channel_context(chan), p->dtmf_buf)) {
/*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
ast_indicate(chan, -1);
} else {
/* XXX Redundant? We should already be playing dialtone */
/*tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALTONE);*/
transmit_notify_request(sub, "L/dl");
}
if (ast_exists_extension(chan, ast_channel_context(chan), p->dtmf_buf, 1, p->cid_num)) {
if (!res || !ast_matchmore_extension(chan, ast_channel_context(chan), p->dtmf_buf, 1, p->cid_num)) {
if (getforward) {
/* Record this as the forwarding extension */
ast_copy_string(p->call_forward, p->dtmf_buf, sizeof(p->call_forward));
ast_verb(3, "Setting call forward to '%s' on channel %s\n",
p->call_forward, ast_channel_name(chan));
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
if (res)
break;
usleep(500000);
/*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
ast_indicate(chan, -1);
sleep(1);
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALTONE);*/
transmit_notify_request(sub, "L/dl");
len = 0;
getforward = 0;
} else {
/*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/
ast_indicate(chan, -1);
ast_channel_lock(chan);
ast_channel_exten_set(chan, p->dtmf_buf);
ast_channel_dialed(chan)->number.str = ast_strdup(p->dtmf_buf);
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
ast_set_callerid(chan,
p->hidecallerid ? "" : p->cid_num,
p->hidecallerid ? "" : p->cid_name,
ast_channel_caller(chan)->ani.number.valid ? NULL : p->cid_num);
ast_setstate(chan, AST_STATE_RING);
ast_channel_unlock(chan);
if (p->dtmfmode & MGCP_DTMF_HYBRID) {
p->dtmfmode |= MGCP_DTMF_INBAND;
ast_indicate(chan, -1);
}
res = ast_pbx_run(chan);
if (res) {
ast_log(LOG_WARNING, "PBX exited non-zero\n");
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
/*transmit_notify_request(p, "nbz", 1);*/
transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
}
return NULL;
}
} else {
/* It's a match, but they just typed a digit, and there is an ambiguous match,
so just set the timeout to matchdigittimeout and wait some more */
timeout = matchdigittimeout;
}
} else if (res == 0) {
ast_debug(1, "not enough digits (and no ambiguous match)...\n");
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
/*dahdi_wait_event(p->subs[index].zfd);*/
ast_hangup(chan);
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
return NULL;
} else if (p->hascallwaiting && p->callwaiting && !strcmp(p->dtmf_buf, "*70")) {
ast_verb(3, "Disabling call waiting on %s\n", ast_channel_name(chan));
/* Disable call waiting if enabled */
p->callwaiting = 0;
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
len = 0;
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
timeout = firstdigittimeout;
} else if (!strcmp(p->dtmf_buf, pickupexten)) {
/* Scan all channels and see if any there
* ringing channels with that have call groups
* that equal this channels pickup group
*/
if (ast_pickup_call(chan)) {
ast_log(LOG_WARNING, "No call pickup possible...\n");
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_CONGESTION);*/
transmit_notify_request(sub, p->ncs ? "L/cg" : "G/cg");
}
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
ast_hangup(chan);
return NULL;
} else if (!p->hidecallerid && !strcmp(p->dtmf_buf, "*67")) {
ast_verb(3, "Disabling Caller*ID on %s\n", ast_channel_name(chan));
/* Disable Caller*ID if enabled */
p->hidecallerid = 1;
ast_set_callerid(chan, "", "", NULL);
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
len = 0;
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
timeout = firstdigittimeout;
} else if (p->callreturn && !strcmp(p->dtmf_buf, "*69")) {
res = 0;
if (!ast_strlen_zero(p->lastcallerid)) {
res = ast_say_digit_str(chan, p->lastcallerid, "", ast_channel_language(chan));
}
if (!res)
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
break;
} else if (!strcmp(p->dtmf_buf, "*78")) {
/* Do not disturb */
ast_verb(3, "Enabled DND on channel %s\n", ast_channel_name(chan));
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
p->dnd = 1;
getforward = 0;
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
len = 0;
} else if (!strcmp(p->dtmf_buf, "*79")) {
/* Do not disturb */
ast_verb(3, "Disabled DND on channel %s\n", ast_channel_name(chan));
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
p->dnd = 0;
getforward = 0;
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
len = 0;
} else if (p->cancallforward && !strcmp(p->dtmf_buf, "*72")) {
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
getforward = 1;
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
len = 0;
} else if (p->cancallforward && !strcmp(p->dtmf_buf, "*73")) {
ast_verb(3, "Cancelling call forwarding on channel %s\n", ast_channel_name(chan));
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
memset(p->call_forward, 0, sizeof(p->call_forward));
getforward = 0;
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
len = 0;
} else if (ast_parking_provider_registered() && ast_parking_is_exten_park(ast_channel_context(chan), p->dtmf_buf) &&
sub->next->owner) {
RAII_VAR(struct ast_bridge_channel *, bridge_channel, NULL, ao2_cleanup);
/* This is a three way call, the main call being a real channel,
and we're parking the first call. */
ast_channel_lock(chan);
bridge_channel = ast_channel_get_bridge_channel(chan);
ast_channel_unlock(chan);
if (bridge_channel && !ast_parking_blind_transfer_park(bridge_channel, ast_channel_context(chan), p->dtmf_buf, NULL, NULL)) {
ast_verb(3, "Parking call to '%s'\n", ast_channel_name(chan));
}
break;
} else if (!ast_strlen_zero(p->lastcallerid) && !strcmp(p->dtmf_buf, "*60")) {
ast_verb(3, "Blacklisting number %s\n", p->lastcallerid);
res = ast_db_put("blacklist", p->lastcallerid, "1");
if (!res) {
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
len = 0;
}
} else if (p->hidecallerid && !strcmp(p->dtmf_buf, "*82")) {
ast_verb(3, "Enabling Caller*ID on %s\n", ast_channel_name(chan));
/* Enable Caller*ID if enabled */
p->hidecallerid = 0;
ast_set_callerid(chan, p->cid_num, p->cid_name, NULL);
/*res = tone_zone_play_tone(p->subs[index].zfd, DAHDI_TONE_DIALRECALL);*/
transmit_notify_request(sub, "L/sl");
len = 0;
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
timeout = firstdigittimeout;
} else if (!ast_canmatch_extension(chan, ast_channel_context(chan), p->dtmf_buf, 1,
S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL))
&& ((p->dtmf_buf[0] != '*') || (strlen(p->dtmf_buf) > 2))) {
ast_debug(1, "Can't match %s from '%s' in context %s\n", p->dtmf_buf,
S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, "<Unknown Caller>"),
ast_channel_context(chan));
break;
}
if (!timeout)
timeout = gendigittimeout;
if (len && !ast_ignore_pattern(ast_channel_context(chan), p->dtmf_buf))
/*tone_zone_play_tone(p->subs[index].zfd, -1);*/
ast_indicate(chan, -1);
}
#if 0
for (;;) {
res = ast_waitfordigit(chan, to);
if (!res) {
ast_debug(1, "Timeout...\n");
break;
}
if (res < 0) {
ast_debug(1, "Got hangup...\n");
ast_hangup(chan);
break;
}
exten[pos++] = res;
if (!ast_ignore_pattern(chan->context, exten))
ast_indicate(chan, -1);
if (ast_matchmore_extension(chan, chan->context, exten, 1, chan->callerid)) {
if (ast_exists_extension(chan, chan->context, exten, 1, chan->callerid))
to = 3000;
else
to = 8000;
} else
break;
}
if (ast_exists_extension(chan, chan->context, exten, 1, chan->callerid)) {
ast_copy_string(chan->exten, exten, sizeof(chan->exten)1);
if (!p->rtp) {
start_rtp(p);
}
ast_setstate(chan, AST_STATE_RING);
chan->rings = 1;
if (ast_pbx_run(chan)) {
ast_log(LOG_WARNING, "Unable to launch PBX on %s\n", chan->name);
} else {
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
return NULL;
}
}
#endif
ast_hangup(chan);
memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf));
return NULL;
}
/*! \brief Complete an attended transfer
*
* \param p The endpoint performing the attended transfer
* \param sub The sub-channel completing the attended transfer
*
* \note p->sub is the currently active sub-channel (the channel the phone is using)
* \note p->sub->next is the sub-channel not in use, potentially on hold
*
* \retval 0 when channel should be hung up
* \retval 1 when channel should not be hung up
*/
static int attempt_transfer(struct mgcp_endpoint *p, struct mgcp_subchannel *sub)
{
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;
}
static void handle_hd_hf(struct mgcp_subchannel *sub, char *ev)
{
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);*/
}
}
}
static int handle_request(struct mgcp_subchannel *sub, struct mgcp_request *req, struct sockaddr_in *sin)
{
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 always
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 active 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;
}
static int find_and_retrans(struct mgcp_subchannel *sub, struct mgcp_request *req)
{
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;
}
static int mgcpsock_read(int *id, int fd, short events, void *ignore)
{
struct mgcp_request req;
struct sockaddr_in sin;
struct mgcp_subchannel *sub;
int res;
socklen_t len;
int result;
int ident;
len = sizeof(sin);
memset(&req, 0, sizeof(req));
res = recvfrom(mgcpsock, req.data, sizeof(req.data) - 1, 0, (struct sockaddr *)&sin, &len);
if (res < 0) {
if (errno != ECONNREFUSED)
ast_log(LOG_WARNING, "Recv error: %s\n", strerror(errno));
return 1;
}
req.data[res] = '\0';
req.len = res;
ast_debug(1, "MGCP read: \n%s\nfrom %s:%d\n", req.data, ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port));
parse(&req);
if (req.headers < 1) {
/* Must have at least one header */
return 1;
}
if (ast_strlen_zero(req.identifier)) {
ast_log(LOG_NOTICE, "Message from %s missing identifier\n", ast_inet_ntoa(sin.sin_addr));
return 1;
}
if (sscanf(req.verb, "%30d", &result) && sscanf(req.identifier, "%30d", &ident)) {
if (result < 200) {
ast_debug(1, "Ignoring provisional response on transaction %d\n", ident);
return 1;
}
/* Try to find who this message is for, if it's important */
sub = find_subchannel_and_lock(NULL, ident, &sin);
if (sub) {
struct mgcp_gateway *gw = sub->parent->parent;
struct mgcp_message *cur, *prev;
ast_mutex_unlock(&sub->lock);
ast_mutex_lock(&gw->msgs_lock);
for (prev = NULL, cur = gw->msgs; cur; prev = cur, cur = cur->next) {
if (cur->seqno == ident) {
ast_debug(1, "Got response back on transaction %d\n", ident);
if (prev)
prev->next = cur->next;
else
gw->msgs = cur->next;
break;
}
}
/* stop retrans timer if the queue is empty */
if (!gw->msgs) {
AST_SCHED_DEL(sched, gw->retransid);
}
ast_mutex_unlock(&gw->msgs_lock);
if (cur) {
handle_response(cur->owner_ep, cur->owner_sub, result, ident, &req);
ast_free(cur);
return 1;
}
ast_log(LOG_NOTICE, "Got response back on [%s] for transaction %d we aren't sending?\n",
gw->name, ident);
}
} else {
if (ast_strlen_zero(req.endpoint) ||
ast_strlen_zero(req.version) ||
ast_strlen_zero(req.verb)) {
ast_log(LOG_NOTICE, "Message must have a verb, an idenitifier, version, and endpoint\n");
return 1;
}
/* Process request, with iflock held */
sub = find_subchannel_and_lock(req.endpoint, 0, &sin);
if (sub) {
/* look first to find a matching response in the queue */
if (!find_and_retrans(sub, &req))
/* pass the request off to the currently mastering subchannel */
handle_request(sub, &req, &sin);
ast_mutex_unlock(&sub->lock);
}
}
return 1;
}
static int *mgcpsock_read_id = NULL;
static int mgcp_prune_realtime_gateway(struct mgcp_gateway *g)
{
struct mgcp_endpoint *enext, *e;
struct mgcp_subchannel *s, *sub;
int i, prune = 1;
if (g->ha || !g->realtime || ast_mutex_trylock(&g->msgs_lock) || g->msgs) {
ast_mutex_unlock(&g->msgs_lock);
return 0;
}
for (e = g->endpoints; e; e = e->next) {
ast_mutex_lock(&e->lock);
if (e->dsp || ast_mutex_trylock(&e->rqnt_queue_lock) || ast_mutex_trylock(&e->cmd_queue_lock)) {
prune = 0;
} else if (e->rqnt_queue || e->cmd_queue) {
prune = 0;
}
s = e->sub;
for (i = 0; (i < MAX_SUBS) && s; i++) {
ast_mutex_lock(&s->lock);
if (!ast_strlen_zero(s->cxident) || s->rtp || ast_mutex_trylock(&s->cx_queue_lock) || s->gate) {
prune = 0;
} else if (s->cx_queue) {
prune = 0;
}
s = s->next;
}
}
for (e = g->endpoints, sub = e->sub, enext = e->next; e; e = enext, enext = e->next) {
for (i = 0; (i < MAX_SUBS) && sub; i++) {
s = sub;
sub = sub->next;
ast_mutex_unlock(&s->lock);
ast_mutex_unlock(&s->cx_queue_lock);
if (prune) {
ast_mutex_destroy(&s->lock);
ast_mutex_destroy(&s->cx_queue_lock);
ast_free(s);
}
}
ast_mutex_unlock(&e->lock);
ast_mutex_unlock(&e->rqnt_queue_lock);
ast_mutex_unlock(&e->cmd_queue_lock);
if (prune) {
ast_mutex_destroy(&e->lock);
ast_mutex_destroy(&e->rqnt_queue_lock);
ast_mutex_destroy(&e->cmd_queue_lock);
ast_free(e);
}
}
if (prune) {
ast_debug(1, "***** MGCP REALTIME PRUNE GW: %s\n", g->name);
}
return prune;
}
static void *do_monitor(void *data)
{
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;
}
static int restart_monitor(void)
{
/* If we're supposed to be stopped -- stay stopped */
if (monitor_thread == AST_PTHREADT_STOP)
return 0;
if (ast_mutex_lock(&monlock)) {
ast_log(LOG_WARNING, "Unable to lock monitor\n");
return -1;
}
if (monitor_thread == pthread_self()) {
ast_mutex_unlock(&monlock);
ast_log(LOG_WARNING, "Cannot kill myself\n");
return -1;
}
if (monitor_thread != AST_PTHREADT_NULL) {
/* Wake up the thread */
pthread_kill(monitor_thread, SIGURG);
} else {
/* Start a new monitor */
if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) {
ast_mutex_unlock(&monlock);
ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
return -1;
}
}
ast_mutex_unlock(&monlock);
return 0;
}
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)
{
struct mgcp_subchannel *sub;
struct ast_channel *tmpc = NULL;
char tmp[256];
if (!(ast_format_cap_iscompatible(cap, global_capability))) {
struct ast_str *cap_buf = ast_str_alloca(AST_FORMAT_CAP_NAMES_LEN);
ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%s'\n",
ast_format_cap_get_names(cap, &cap_buf));
/*return NULL;*/
}
ast_copy_string(tmp, dest, sizeof(tmp));
if (ast_strlen_zero(tmp)) {
ast_log(LOG_NOTICE, "MGCP Channels require an endpoint\n");
return NULL;
}
if (!(sub = find_subchannel_and_lock(tmp, 0, NULL))) {
ast_log(LOG_WARNING, "Unable to find MGCP endpoint '%s'\n", tmp);
*cause = AST_CAUSE_UNREGISTERED;
return NULL;
}
ast_verb(3, "MGCP mgcp_request(%s)\n", tmp);
ast_verb(3, "MGCP cw: %d, dnd: %d, so: %d, sno: %d\n",
sub->parent->callwaiting, sub->parent->dnd, sub->owner ? 1 : 0, sub->next->owner ? 1: 0);
/* Must be busy */
if (((sub->parent->callwaiting) && ((sub->owner) && (sub->next->owner))) ||
((!sub->parent->callwaiting) && (sub->owner)) ||
(sub->parent->dnd && (ast_strlen_zero(sub->parent->call_forward)))) {
if (sub->parent->hookstate == MGCP_ONHOOK) {
if (has_voicemail(sub->parent)) {
transmit_notify_request(sub,"L/vmwi(+)");
} else {
transmit_notify_request(sub,"L/vmwi(-)");
}
}
*cause = AST_CAUSE_BUSY;
ast_mutex_unlock(&sub->lock);
return NULL;
}
tmpc = mgcp_new(sub->owner ? sub->next : sub, AST_STATE_DOWN, assignedids, requestor);
ast_mutex_unlock(&sub->lock);
if (!tmpc)
ast_log(LOG_WARNING, "Unable to make channel for '%s'\n", tmp);
restart_monitor();
return tmpc;
}
/* modified for reload support */
/*! \brief build_gateway: parse mgcp.conf and create gateway/endpoint structures */
static struct mgcp_gateway *build_gateway(char *cat, struct ast_variable *v)
{
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);
}
static enum ast_rtp_glue_result mgcp_get_rtp_peer(struct ast_channel *chan, struct ast_rtp_instance **instance)
{
struct mgcp_subchannel *sub = NULL;
if (!(sub = ast_channel_tech_pvt(chan)) || !(sub->rtp))
return AST_RTP_GLUE_RESULT_FORBID;
ao2_ref(sub->rtp, +1);
*instance = sub->rtp;
if (sub->parent->directmedia)
return AST_RTP_GLUE_RESULT_REMOTE;
else
return AST_RTP_GLUE_RESULT_LOCAL;
}
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)
{
/* XXX Is there such thing as video support with MGCP? XXX */
struct mgcp_subchannel *sub;
sub = ast_channel_tech_pvt(chan);
if (sub && !sub->alreadygone) {
transmit_modify_with_sdp(sub, rtp, cap);
return 0;
}
return -1;
}
static void mgcp_get_codec(struct ast_channel *chan, struct ast_format_cap *result)
{
struct mgcp_subchannel *sub = ast_channel_tech_pvt(chan);
struct mgcp_endpoint *p = sub->parent;
ast_format_cap_append_from_cap(result, p->cap, AST_MEDIA_TYPE_UNKNOWN);
}
static struct ast_rtp_glue mgcp_rtp_glue = {
.type = "MGCP",
.get_rtp_info = mgcp_get_rtp_peer,
.update_peer = mgcp_set_rtp_peer,
.get_codec = mgcp_get_codec,
};
static int acf_channel_read(struct ast_channel *chan, const char *funcname, char *args, char *buf, size_t buflen)
{
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;
}
static void destroy_endpoint(struct mgcp_endpoint *e)
{
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);
}
static void destroy_gateway(struct mgcp_gateway *g)
{
if (g->ha)
ast_free_ha(g->ha);
dump_queue(g, NULL);
ast_free(g);
}
static void prune_gateways(void)
{
struct mgcp_gateway *g, *z, *r;
struct mgcp_endpoint *e, *p, *t;
ast_mutex_lock(&gatelock);
/* prune gateways */
for (z = NULL, g = gateways; g;) {
/* prune endpoints */
for (p = NULL, e = g->endpoints; e; ) {
if (!g->realtime && (e->delme || g->delme)) {
t = e;
e = e->next;
if (!p)
g->endpoints = e;
else
p->next = e;
destroy_endpoint(t);
} else {
p = e;
e = e->next;
}
}
if (g->delme) {
r = g;
g = g->next;
if (!z)
gateways = g;
else
z->next = g;
destroy_gateway(r);
} else {
z = g;
g = g->next;
}
}
ast_mutex_unlock(&gatelock);
}
static struct ast_variable *add_var(const char *buf, struct ast_variable *list)
{
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;
}
/*! \brief
* duplicate a list of channel variables, \return the copy.
*/
static struct ast_variable *copy_vars(struct ast_variable *src)
{
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;
}
/*!
* \brief Resolve the given hostname and save its IPv4 address.
*
* \param[in] hostname The hostname to resolve.
* \param[out] sin_addr Pointer to a <tt>struct in_addr</tt> in which to
* store the resolved IPv4 address. \c sin_addr will
* not be changed if resolution fails.
*
* \retval 0 if successful
* \retval 1 on failure
*/
static int resolve_first_addr(const char *hostname, struct in_addr *sin_addr)
{
struct ast_sockaddr addr = { {0,} };
struct sockaddr_in tmp;
if (ast_sockaddr_resolve_first_af(&addr, hostname, PARSE_PORT_FORBID, AF_INET)) {
return 1;
}
ast_sockaddr_to_sin(&addr, &tmp);
*sin_addr = tmp.sin_addr;
return 0;
}
static int reload_config(int reload)
{
struct ast_config *cfg;
struct ast_variable *v;
struct mgcp_gateway *g;
struct mgcp_endpoint *e;
char *cat;
struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
if (gethostname(ourhost, sizeof(ourhost)-1)) {
ast_log(LOG_WARNING, "Unable to get hostname, MGCP disabled\n");
return 0;
}
cfg = ast_config_load(config, config_flags);
/* We *must* have a config file otherwise stop immediately */
if (!cfg) {
ast_log(LOG_NOTICE, "Unable to load config %s, MGCP disabled\n", config);
return 0;
} else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
return 0;
} else if (cfg == CONFIG_STATUS_FILEINVALID) {
ast_log(LOG_ERROR, "Config file %s is in an invalid format. Aborting.\n", config);
return 0;
}
memset(&bindaddr, 0, sizeof(bindaddr));
dtmfmode = 0;
/* Copy the default jb config over global_jbconf */
memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
for (v = ast_variable_browse(cfg, "general"); v; v = v->next) {
/* handle jb conf */
if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
continue;
}
/* Create the interface list */
if (!strcasecmp(v->name, "bindaddr")) {
if (resolve_first_addr(v->value, &bindaddr.sin_addr)) {
ast_log(LOG_WARNING, "Invalid address: %s\n", v->value);
}
} else if (!strcasecmp(v->name, "allow")) {
ast_format_cap_update_by_allow_disallow(global_capability, v->value, 1);
} else if (!strcasecmp(v->name, "disallow")) {
ast_format_cap_update_by_allow_disallow(global_capability, v->value, 0);
} else if (!strcasecmp(v->name, "tos")) {
if (ast_str2tos(v->value, &qos.tos)) {
ast_log(LOG_WARNING, "Invalid tos value at line %d, refer to QoS documentation\n", v->lineno);
}
} else if (!strcasecmp(v->name, "tos_audio")) {
if (ast_str2tos(v->value, &qos.tos_audio))
ast_log(LOG_WARNING, "Invalid tos_audio value at line %d, refer to QoS documentation\n", v->lineno);
} else if (!strcasecmp(v->name, "cos")) {
if (ast_str2cos(v->value, &qos.cos))
ast_log(LOG_WARNING, "Invalid cos value at line %d, refer to QoS documentation\n", v->lineno);
} else if (!strcasecmp(v->name, "cos_audio")) {
if (ast_str2cos(v->value, &qos.cos_audio))
ast_log(LOG_WARNING, "Invalid cos_audio value at line %d, refer to QoS documentation\n", v->lineno);
} else if (!strcasecmp(v->name, "port")) {
if (sscanf(v->value, "%5d", &ourport) == 1) {
bindaddr.sin_port = htons(ourport);
} else {
ast_log(LOG_WARNING, "Invalid port number '%s' at line %d of %s\n", v->value, v->lineno, config);
}
} else if (!strcasecmp(v->name, "firstdigittimeout")) {
firstdigittimeout = atoi(v->value);
} else if (!strcasecmp(v->name, "gendigittimeout")) {
gendigittimeout = atoi(v->value);
} else if (!strcasecmp(v->name, "matchdigittimeout")) {
matchdigittimeout = atoi(v->value);
}
}
/* mark existing entries for deletion */
ast_mutex_lock(&gatelock);
for (g = gateways; g; g = g->next) {
g->delme = 1;
for (e = g->endpoints; e; e = e->next) {
e->delme = 1;
}
}
ast_mutex_unlock(&gatelock);
for (cat = ast_category_browse(cfg, NULL); cat; cat = ast_category_browse(cfg, cat)) {
if (strcasecmp(cat, "general")) {
ast_mutex_lock(&gatelock);
if ((g = build_gateway(cat, ast_variable_browse(cfg, cat)))) {
ast_verb(3, "Added gateway '%s'\n", g->name);
g->next = gateways;
gateways = g;
}
ast_mutex_unlock(&gatelock);
/* FS: process queue and IO */
if (monitor_thread == pthread_self()) {
if (sched) ast_sched_runq(sched);
if (io) ast_io_wait(io, 10);
}
}
}
/* prune deleted entries etc. */
prune_gateways();
if (ntohl(bindaddr.sin_addr.s_addr)) {
memcpy(&__ourip, &bindaddr.sin_addr, sizeof(__ourip));
} else {
if (resolve_first_addr(ourhost, &__ourip)) {
ast_log(LOG_WARNING, "Unable to get our IP address, MGCP disabled\n");
ast_config_destroy(cfg);
return 0;
}
}
if (!ntohs(bindaddr.sin_port))
bindaddr.sin_port = htons(DEFAULT_MGCP_CA_PORT);
bindaddr.sin_family = AF_INET;
ast_mutex_lock(&netlock);
if (mgcpsock > -1)
close(mgcpsock);
if (mgcpsock_read_id != NULL)
ast_io_remove(io, mgcpsock_read_id);
mgcpsock_read_id = NULL;
mgcpsock = socket(AF_INET, SOCK_DGRAM, 0);
if (mgcpsock < 0) {
ast_log(LOG_WARNING, "Unable to create MGCP socket: %s\n", strerror(errno));
} else {
if (bind(mgcpsock, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) < 0) {
ast_log(LOG_WARNING, "Failed to bind to %s:%d: %s\n",
ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port),
strerror(errno));
close(mgcpsock);
mgcpsock = -1;
} else {
ast_verb(2, "MGCP Listening on %s:%d\n",
ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port));
ast_set_qos(mgcpsock, qos.tos, qos.cos, "MGCP");
}
}
ast_mutex_unlock(&netlock);
ast_config_destroy(cfg);
/* send audit only to the new endpoints */
for (g = gateways; g; g = g->next) {
for (e = g->endpoints; e && e->needaudit; e = e->next) {
e->needaudit = 0;
transmit_audit_endpoint(e);
ast_verb(3, "MGCP Auditing endpoint %s@%s for hookstate\n", e->name, g->name);
}
}
return 0;
}
/*!
* \brief Load the module
*
* Module loading including tests for configuration or dependencies.
* This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE,
* or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails
* tests return AST_MODULE_LOAD_FAILURE. If the module can not load the
* configuration file or other non-critical problem return
* AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.
*/
static int load_module(void)
{
if (!(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;
}
ast_rtp_glue_register(&mgcp_rtp_glue);
ast_cli_register_multiple(cli_mgcp, sizeof(cli_mgcp) / sizeof(struct ast_cli_entry));
/* And start the monitor for the first time */
restart_monitor();
return AST_MODULE_LOAD_SUCCESS;
}
static char *mgcp_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
static int deprecated = 0;
if (e) {
switch (cmd) {
case CLI_INIT:
e->command = "mgcp reload";
e->usage =
"Usage: mgcp reload\n"
" 'mgcp reload' is deprecated. Please use 'reload chan_mgcp.so' instead.\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
}
if (!deprecated && a && a->argc > 0) {
ast_log(LOG_WARNING, "'mgcp reload' is deprecated. Please use 'reload chan_mgcp.so' instead.\n");
deprecated = 1;
}
ast_mutex_lock(&mgcp_reload_lock);
if (mgcp_reloading) {
ast_verbose("Previous mgcp reload not yet done\n");
} else {
mgcp_reloading = 1;
}
ast_mutex_unlock(&mgcp_reload_lock);
restart_monitor();
return CLI_SUCCESS;
}
static int reload(void)
{
mgcp_reload(NULL, 0, NULL);
return 0;
}
static int unload_module(void)
{
struct mgcp_endpoint *e;
struct mgcp_gateway *g;
/* Check to see if we're reloading */
if (ast_mutex_trylock(&mgcp_reload_lock)) {
ast_log(LOG_WARNING, "MGCP is currently reloading. Unable to remove module.\n");
return -1;
} else {
mgcp_reloading = 1;
ast_mutex_unlock(&mgcp_reload_lock);
}
/* First, take us out of the channel loop */
ast_channel_unregister(&mgcp_tech);
/* Shut down the monitoring thread */
if (!ast_mutex_lock(&monlock)) {
if (monitor_thread && (monitor_thread != AST_PTHREADT_STOP)) {
pthread_cancel(monitor_thread);
pthread_kill(monitor_thread, SIGURG);
pthread_join(monitor_thread, NULL);
}
monitor_thread = AST_PTHREADT_STOP;
ast_mutex_unlock(&monlock);
} else {
ast_log(LOG_WARNING, "Unable to lock the monitor\n");
/* We always want to leave this in a consistent state */
ast_channel_register(&mgcp_tech);
mgcp_reloading = 0;
mgcp_reload(NULL, 0, NULL);
return -1;
}
if (!ast_mutex_lock(&gatelock)) {
for (g = gateways; g; g = g->next) {
g->delme = 1;
for (e = g->endpoints; e; e = e->next) {
e->delme = 1;
}
}
prune_gateways();
ast_mutex_unlock(&gatelock);
} else {
ast_log(LOG_WARNING, "Unable to lock the gateways list.\n");
/* We always want to leave this in a consistent state */
ast_channel_register(&mgcp_tech);
/* Allow the monitor to restart */
monitor_thread = AST_PTHREADT_NULL;
mgcp_reloading = 0;
mgcp_reload(NULL, 0, NULL);
return -1;
}
if (mgcpsock > -1) {
close(mgcpsock);
}
ast_rtp_glue_unregister(&mgcp_rtp_glue);
ast_cli_unregister_multiple(cli_mgcp, sizeof(cli_mgcp) / sizeof(struct ast_cli_entry));
ast_sched_context_destroy(sched);
ao2_ref(global_capability, -1);
global_capability = NULL;
ao2_ref(mgcp_tech.capabilities, -1);
mgcp_tech.capabilities = NULL;
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Media Gateway Control Protocol (MGCP)",
.support_level = AST_MODULE_SUPPORT_EXTENDED,
.load = load_module,
.unload = unload_module,
.reload = reload,
.load_pri = AST_MODPRI_CHANNEL_DRIVER,
.optional_modules = "res_pktccops",
);