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remote.cpp
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/*****************************************************************************\
** **
** LCR **
** **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg **
** **
** mISDN remote **
** **
\*****************************************************************************/
#include "main.h"
unsigned int new_remote = 1000;
/*
* constructor
*/
Premote::Premote(int type, struct mISDNport *mISDNport, char *portname, struct port_settings *settings, int channel, int exclusive, int mode, int remote_id) : PmISDN(type, mISDNport, portname, settings, channel, exclusive, mode)
{
union parameter param;
p_callerinfo.itype = (mISDNport->ifport->interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
p_m_r_ref = new_remote++;
SCPY(p_m_r_remote_app, mISDNport->ifport->remote_app);
p_m_r_handle = 0;
/* send new ref to remote socket */
memset(¶m, 0, sizeof(union parameter));
if (type == PORT_TYPE_REMOTE_OUT)
param.newref.direction = 1; /* new ref from lcr */
p_m_r_remote_id = remote_id;
if (admin_message_from_lcr(p_m_r_remote_id, p_m_r_ref, MESSAGE_NEWREF, ¶m) < 0)
FATAL("No socket with remote application '%s' found, this shall not happen. because we already created one.\n", mISDNport->ifport->remote_app);
PDEBUG(DEBUG_GSM, "Created new RemotePort(%s).\n", portname);
}
/*
* destructor
*/
Premote::~Premote()
{
/* need to remote (import) external channel from remote application */
if (p_m_r_handle) {
message_bchannel_to_remote(p_m_r_remote_id, p_m_r_ref, BCHANNEL_REMOVE, p_m_r_handle, 0, 0, 0, 0, 0, 0, 1);
chan_trace_header(p_m_mISDNport, this, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "remove");
add_trace("channel", NULL, "%d.%d", p_m_r_handle>>8, p_m_r_handle&0xff);
end_trace();
}
PDEBUG(DEBUG_GSM, "Destroyed Remote process(%s).\n", p_name);
}
/*
* endpoint sends messages to the port
*/
int Premote::message_epoint(unsigned int epoint_id, int message_type, union parameter *param)
{
struct lcr_msg *message;
int channel;
int ret;
struct epoint_list *epointlist;
if (PmISDN::message_epoint(epoint_id, message_type, param))
return 1;
if (message_type == MESSAGE_SETUP) {
ret = channel = hunt_bchannel();
if (ret < 0)
goto no_channel;
/* open channel */
ret = seize_bchannel(channel, 1);
if (ret < 0) {
no_channel:
message = message_create(p_serial, epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = 34;
message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
message_put(message);
new_state(PORT_STATE_RELEASE);
delete this;
return 0;
}
bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
/* attach only if not already */
epointlist = p_epointlist;
while(epointlist) {
if (epointlist->epoint_id == epoint_id)
break;
epointlist = epointlist->next;
}
if (!epointlist)
epointlist_new(epoint_id);
/* set context to pbx */
SCPY(param->setup.context, "pbx");
}
/* look for Remote's interface */
if (admin_message_from_lcr(p_m_r_remote_id, p_m_r_ref, message_type, param)<0) {
PERROR("No socket with remote application '%s' found, this shall not happen. Closing socket shall cause release of all remote ports.\n", p_m_mISDNport->ifport->remote_app);
return 0;
}
/* enable audio path */
if (message_type == MESSAGE_SETUP) {
union parameter newparam;
memset(&newparam, 0, sizeof(union parameter));
admin_message_from_lcr(p_m_r_remote_id, p_m_r_ref, MESSAGE_PATTERN, &newparam);
newparam.audiopath = 1;
admin_message_from_lcr(p_m_r_remote_id, p_m_r_ref, MESSAGE_AUDIOPATH, &newparam);
}
if (message_type == MESSAGE_RELEASE) {
new_state(PORT_STATE_RELEASE);
delete this;
return 0;
}
return 0;
}
void Premote::message_remote(int message_type, union parameter *param)
{
class Endpoint *epoint;
struct lcr_msg *message;
int channel;
int ret;
if (message_type == MESSAGE_SETUP) {
/* enable audio path */
union parameter newparam;
memset(&newparam, 0, sizeof(union parameter));
admin_message_from_lcr(p_m_r_remote_id, p_m_r_ref, MESSAGE_PATTERN, &newparam);
newparam.audiopath = 1;
admin_message_from_lcr(p_m_r_remote_id, p_m_r_ref, MESSAGE_AUDIOPATH, &newparam);
/* set source interface */
param->setup.callerinfo.itype = p_callerinfo.itype;
param->setup.callerinfo.isdn_port = p_m_portnum;
SCPY(param->setup.callerinfo.interface, p_m_mISDNport->ifport->interface->name);
ret = channel = hunt_bchannel();
if (ret < 0)
goto no_channel;
/* open channel */
ret = seize_bchannel(channel, 1);
if (ret < 0) {
no_channel:
message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = 34;
message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
message_put(message);
new_state(PORT_STATE_RELEASE);
delete this;
return;
}
bchannel_event(p_m_mISDNport, p_m_b_index, B_EVENT_USE);
/* create endpoint */
if (p_epointlist)
FATAL("Incoming call but already got an endpoint.\n");
if (!(epoint = new Endpoint(p_serial, 0)))
FATAL("No memory for Endpoint instance\n");
epoint->ep_app = new_endpointapp(epoint, 0, p_m_mISDNport->ifport->interface->app); //incoming
epointlist_new(epoint->ep_serial);
}
/* set serial on bchannel message
* also ref is given, so we send message with ref */
if (message_type == MESSAGE_BCHANNEL) {
int i = p_m_b_index;
unsigned int portid = (mISDNloop.port<<8) + i+1+(i>=15);
switch (param->bchannel.type) {
case BCHANNEL_REQUEST:
p_m_r_handle = portid;
message_bchannel_to_remote(p_m_r_remote_id, p_m_r_ref, BCHANNEL_ASSIGN, portid, 0, 0, 0, 0, 0, 0, 1);
chan_trace_header(p_m_mISDNport, this, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "assign");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
break;
case BCHANNEL_RELEASE:
p_m_r_handle = 0;
message_bchannel_to_remote(p_m_r_remote_id, p_m_r_ref, BCHANNEL_REMOVE, portid, 0, 0, 0, 0, 0, 0, 1);
chan_trace_header(p_m_mISDNport, this, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "remove");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
break;
}
return;
}
/* cannot just forward, because param is not of container "struct lcr_msg" */
message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, message_type);
memcpy(&message->param, param, sizeof(message->param));
message_put(message);
if (message_type == MESSAGE_RELEASE) {
new_state(PORT_STATE_RELEASE);
delete this;
return;
}
}
/* select free bchannel from loopback interface */
int Premote::hunt_bchannel(void)
{
return loop_hunt_bchannel(this, p_m_mISDNport);
}