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lcr/gsm.cpp

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/*****************************************************************************\
** **
** LCR **
** **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg **
** MNCC-Interface: Harald Welte **
** **
** mISDN gsm **
** **
\*****************************************************************************/
#include "main.h"
#include "mncc.h"
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
extern "C" {
#include "gsm_audio.h"
}
#include <assert.h>
#define SOCKET_RETRY_TIMER 5
//struct lcr_gsm *gsm = NULL;
int new_callref = 1;
/* names of MNCC-SAP */
static const struct _value_string {
int msg_type;
const char *name;
} mncc_names[] = {
{ 0, "New call ref" },
{ 1, "Codec negotiation" },
{ MNCC_SETUP_REQ, "MNCC_SETUP_REQ" },
{ MNCC_SETUP_IND, "MNCC_SETUP_IND" },
{ MNCC_SETUP_RSP, "MNCC_SETUP_RSP" },
{ MNCC_SETUP_CNF, "MNCC_SETUP_CNF" },
{ MNCC_SETUP_COMPL_REQ, "MNCC_SETUP_COMPL_REQ" },
{ MNCC_SETUP_COMPL_IND, "MNCC_SETUP_COMPL_IND" },
{ MNCC_CALL_CONF_IND, "MNCC_CALL_CONF_IND" },
{ MNCC_CALL_PROC_REQ, "MNCC_CALL_PROC_REQ" },
{ MNCC_PROGRESS_REQ, "MNCC_PROGRESS_REQ" },
{ MNCC_ALERT_REQ, "MNCC_ALERT_REQ" },
{ MNCC_ALERT_IND, "MNCC_ALERT_IND" },
{ MNCC_NOTIFY_REQ, "MNCC_NOTIFY_REQ" },
{ MNCC_NOTIFY_IND, "MNCC_NOTIFY_IND" },
{ MNCC_DISC_REQ, "MNCC_DISC_REQ" },
{ MNCC_DISC_IND, "MNCC_DISC_IND" },
{ MNCC_REL_REQ, "MNCC_REL_REQ" },
{ MNCC_REL_IND, "MNCC_REL_IND" },
{ MNCC_REL_CNF, "MNCC_REL_CNF" },
{ MNCC_FACILITY_REQ, "MNCC_FACILITY_REQ" },
{ MNCC_FACILITY_IND, "MNCC_FACILITY_IND" },
{ MNCC_START_DTMF_IND, "MNCC_START_DTMF_IND" },
{ MNCC_START_DTMF_RSP, "MNCC_START_DTMF_RSP" },
{ MNCC_START_DTMF_REJ, "MNCC_START_DTMF_REJ" },
{ MNCC_STOP_DTMF_IND, "MNCC_STOP_DTMF_IND" },
{ MNCC_STOP_DTMF_RSP, "MNCC_STOP_DTMF_RSP" },
{ MNCC_MODIFY_REQ, "MNCC_MODIFY_REQ" },
{ MNCC_MODIFY_IND, "MNCC_MODIFY_IND" },
{ MNCC_MODIFY_RSP, "MNCC_MODIFY_RSP" },
{ MNCC_MODIFY_CNF, "MNCC_MODIFY_CNF" },
{ MNCC_MODIFY_REJ, "MNCC_MODIFY_REJ" },
{ MNCC_HOLD_IND, "MNCC_HOLD_IND" },
{ MNCC_HOLD_CNF, "MNCC_HOLD_CNF" },
{ MNCC_HOLD_REJ, "MNCC_HOLD_REJ" },
{ MNCC_RETRIEVE_IND, "MNCC_RETRIEVE_IND" },
{ MNCC_RETRIEVE_CNF, "MNCC_RETRIEVE_CNF" },
{ MNCC_RETRIEVE_REJ, "MNCC_RETRIEVE_REJ" },
{ MNCC_USERINFO_REQ, "MNCC_USERINFO_REQ" },
{ MNCC_USERINFO_IND, "MNCC_USERINFO_IND" },
{ MNCC_REJ_REQ, "MNCC_REJ_REQ" },
{ MNCC_REJ_IND, "MNCC_REJ_IND" },
{ MNCC_PROGRESS_IND, "MNCC_PROGRESS_IND" },
{ MNCC_CALL_PROC_IND, "MNCC_CALL_PROC_IND" },
{ MNCC_CALL_CONF_REQ, "MNCC_CALL_CONF_REQ" },
{ MNCC_START_DTMF_REQ, "MNCC_START_DTMF_REQ" },
{ MNCC_STOP_DTMF_REQ, "MNCC_STOP_DTMF_REQ" },
{ MNCC_HOLD_REQ, "MNCC_HOLD_REQ " },
{ MNCC_RETRIEVE_REQ, "MNCC_RETRIEVE_REQ" },
{ MNCC_LCHAN_MODIFY, "MNCC_LCHAN_MODIFY" },
{ MNCC_BRIDGE, "MNCC_BRIDGE" },
{ MNCC_FRAME_RECV, "MNCC_FRAME_RECV" },
{ MNCC_FRAME_DROP, "MNCC_FRAME_DROP" },
{ MNCC_RTP_CREATE, "MNCC_RTP_CREATE" },
{ MNCC_RTP_CONNECT, "MNCC_RTP_CONNECT" },
{ MNCC_RTP_FREE, "MNCC_RTP_FREE" },
{ 0, NULL }
};
const char *mncc_name(int value)
{
int i = 0;
static char ukn[32];
while (mncc_names[i].name) {
if (mncc_names[i].msg_type == value)
return mncc_names[i].name;
i++;
}
SPRINT(ukn, "unknown(0x%x)", value);
return ukn;
}
static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data);
/*
* create and send mncc message
*/
struct gsm_mncc *create_mncc(int msg_type, unsigned int callref)
{
struct gsm_mncc *mncc;
mncc = (struct gsm_mncc *)MALLOC(sizeof(struct gsm_mncc));
mncc->msg_type = msg_type;
mncc->callref = callref;
return (mncc);
}
int send_and_free_mncc(struct lcr_gsm *lcr_gsm, unsigned int msg_type, void *data)
{
int ret = 0;
if (lcr_gsm) {
ret = mncc_send(lcr_gsm, msg_type, data);
}
free(data);
return ret;
}
void Pgsm::send_mncc_rtp_connect(void)
{
struct gsm_mncc_rtp *nrtp;
nrtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CONNECT, p_g_callref);
nrtp->ip = p_g_rtp_ip_remote;
nrtp->port = p_g_rtp_port_remote;
switch (p_g_media_type) {
case MEDIA_TYPE_GSM:
nrtp->payload_msg_type = GSM_TCHF_FRAME;
break;
case MEDIA_TYPE_GSM_EFR:
nrtp->payload_msg_type = GSM_TCHF_FRAME_EFR;
break;
case MEDIA_TYPE_AMR:
nrtp->payload_msg_type = GSM_TCH_FRAME_AMR;
break;
case MEDIA_TYPE_GSM_HR:
nrtp->payload_msg_type = GSM_TCHH_FRAME;
break;
}
nrtp->payload_type = p_g_payload_type;
PDEBUG(DEBUG_GSM, "sending MNCC RTP connect with payload_msg_type=%x, payload_type=%d\n", nrtp->payload_msg_type, nrtp->payload_type);
send_and_free_mncc(p_g_lcr_gsm, nrtp->msg_type, nrtp);
}
static int delete_event(struct lcr_work *work, void *instance, int index);
/*
* constructor
*/
Pgsm::Pgsm(int type, char *portname, struct port_settings *settings, struct interface *interface) : Port(type, portname, settings, interface)
{
#ifdef WITH_GSMHR
signed short homing[160];
int i;
#endif
p_g_tones = 0;
if (interface->is_tones == IS_YES)
p_g_tones = 1;
p_g_earlyb = 0;
if (interface->is_earlyb == IS_YES)
p_g_earlyb = 1;
p_g_rtp_bridge = 0;
if (interface->rtp_bridge)
p_g_rtp_bridge = 1;
p_g_rtp_payloads = 0;
memset(&p_g_samples, 0, sizeof(p_g_samples));
p_callerinfo.itype = (interface->extension)?INFO_ITYPE_ISDN_EXTENSION:INFO_ITYPE_ISDN;
memset(&p_g_delete, 0, sizeof(p_g_delete));
add_work(&p_g_delete, delete_event, this, 0);
p_g_lcr_gsm = NULL;
p_g_callref = 0;
p_g_mode = 0;
p_g_gsm_b_sock = -1;
p_g_gsm_b_index = -1;
p_g_gsm_b_active = 0;
p_g_notify_pending = NULL;
p_g_setup_pending = NULL;
p_g_connect_pending = NULL;
p_g_fr_decoder = NULL;
p_g_fr_encoder = NULL;
p_g_hr_decoder = NULL;
p_g_hr_encoder = NULL;
p_g_amr_decoder = NULL;
p_g_amr_encoder = NULL;
p_g_amr_cmr = 0;
p_g_amr_cmr_valid = 0;
#ifdef WITH_GSMFR
p_g_fr_decoder = gsm_fr_create();
p_g_fr_encoder = gsm_fr_create();
if (!p_g_fr_encoder || !p_g_fr_decoder) {
PERROR("Failed to create GSM FR codec instance\n");
trigger_work(&p_g_delete);
}
#endif
#ifdef WITH_GSMHR
p_g_hr_decoder = gsm_hr_create();
p_g_hr_encoder = gsm_hr_create();
if (!p_g_hr_encoder || !p_g_hr_decoder) {
PERROR("Failed to create GSM HR codec instance\n");
trigger_work(&p_g_delete);
}
/* Homing */
for (i = 0; i < 160; i++)
homing[i] = 0x0008;
gsm_hr_encode(p_g_hr_encoder, homing, NULL);
#endif
#ifdef WITH_GSMAMR
p_g_amr_decoder = gsm_amr_create();
p_g_amr_encoder = gsm_amr_create();
if (!p_g_amr_encoder || !p_g_amr_decoder) {
PERROR("Failed to create GSM AMR codec instance\n");
trigger_work(&p_g_delete);
}
#endif
p_g_rxpos = 0;
p_g_tch_connected = 0;
p_g_media_type = 0;
PDEBUG(DEBUG_GSM, "Created new GSMPort(%s).\n", portname);
}
/*
* destructor
*/
Pgsm::~Pgsm()
{
PDEBUG(DEBUG_GSM, "Destroyed GSM process(%s).\n", p_name);
del_work(&p_g_delete);
/* remove queued message */
if (p_g_notify_pending)
message_free(p_g_notify_pending);
if (p_g_setup_pending)
message_free(p_g_setup_pending);
if (p_g_connect_pending)
message_free(p_g_connect_pending);
//#ifdef WITH_GSMFR
/* close codec */
if (p_g_fr_encoder)
gsm_fr_destroy(p_g_fr_encoder);
if (p_g_fr_decoder)
gsm_fr_destroy(p_g_fr_decoder);
//#endif
#ifdef WITH_GSMHR
if (p_g_hr_encoder)
gsm_hr_destroy(p_g_hr_encoder);
if (p_g_hr_decoder)
gsm_hr_destroy(p_g_hr_decoder);
#endif
#ifdef WITH_GSMAMR
/* close codec */
if (p_g_amr_encoder)
gsm_amr_destroy(p_g_amr_encoder);
if (p_g_amr_decoder)
gsm_amr_destroy(p_g_amr_decoder);
#endif
}
/* receive encoded frame from gsm */
void Pgsm::frame_receive(void *arg)
{
struct gsm_data_frame *frame = (struct gsm_data_frame *)arg;
unsigned char data[160];
int i, cmr;
if (!p_g_fr_decoder)
return;
switch (frame->msg_type) {
case ANALOG_8000HZ:
if (p_g_media_type != MEDIA_TYPE_ANALOG) {
PERROR("'Analog' frame, but current media type mismatches.\n");
return;
}
for (i = 0; i < 160; i++) {
data[i] = audio_s16_to_law[((int16_t *)frame->data)[i] & 0xffff];
}
break;
case GSM_TCHF_FRAME:
if (p_g_media_type != MEDIA_TYPE_GSM) {
PERROR("FR frame, but current media type mismatches.\n");
return;
}
if (!p_g_fr_decoder) {
PERROR("FR frame, but decoder not created.\n");
return;
}
if ((frame->data[0]>>4) != 0xd) {
PDEBUG(DEBUG_GSM, "received GSM frame with wrong magig 0x%x\n", frame->data[0]>>4);
goto bfi;
}
#ifdef WITH_GSMFR
/* decode */
gsm_fr_decode(p_g_fr_decoder, frame->data, p_g_samples);
for (i = 0; i < 160; i++) {
data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
}
#endif
break;
case GSM_TCHH_FRAME:
if (p_g_media_type != MEDIA_TYPE_GSM_HR) {
PERROR("HR frame, but current media type mismatches.\n");
return;
}
if (!p_g_hr_decoder) {
PERROR("HR frame, but decoder not created.\n");
return;
}
if ((frame->data[0]>>4) != 0x0)
goto bfi;
#ifdef WITH_GSMHR
/* decode */
if (gsm_hr_decode(p_g_hr_decoder, frame->data, p_g_samples))
goto bfi;
for (i = 0; i < 160; i++) {
data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
}
#endif
break;
case GSM_TCHF_FRAME_EFR:
if (p_g_media_type != MEDIA_TYPE_GSM_EFR) {
PERROR("EFR frame, but current media type mismatches.\n");
return;
}
if (!p_g_amr_decoder) {
PERROR("EFR frame, but decoder not created.\n");
return;
}
if ((frame->data[0]>>4) != 0xc)
goto bfi;
#ifdef WITH_GSMAMR
/* decode */
gsm_efr_decode(p_g_amr_decoder, frame->data, p_g_samples);
for (i = 0; i < 160; i++) {
data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
}
#endif
break;
case GSM_TCH_FRAME_AMR:
if (p_g_media_type != MEDIA_TYPE_AMR) {
PERROR("AMR frame, but current media type mismatches.\n");
return;
}
if (!p_g_amr_decoder) {
PERROR("AMR frame, but decoder not created.\n");
return;
}
cmr = (frame->data[1] >> 4);
if (cmr <= 7) {
p_g_amr_cmr = cmr;
p_g_amr_cmr_valid = 1;
}
if (!(frame->data[2] & 0x04))
goto bfi;
#ifdef WITH_GSMAMR
/* decode (skip length byte in front) */
gsm_amr_decode(p_g_amr_decoder, frame->data + 1, p_g_samples);
for (i = 0; i < 160; i++) {
data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
}
#endif
break;
case GSM_BAD_FRAME:
default:
bfi:
if (p_echotest) {
/* beep on bad frame */
for (i = 0; i < 160; i++) {
if ((i & 3) > 2)
p_g_samples[i] = 15000;
else
p_g_samples[i] = -15000;
data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
}
} else {
/* repeat on bad frame */
for (i = 0; i < 160; i++) {
p_g_samples[i] = (p_g_samples[i] * 14) >> 4;
data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
}
}
}
/* record data */
if (p_record)
record(data, 160, 0); // from down
if (p_tap)
tap(data, 160, 0); // from down
/* local echo */
if (p_echotest)
bridge_rx(data, 160);
/* send to remote*/
bridge_tx(data, 160);
}
/* send traffic to gsm */
int Pgsm::bridge_rx(unsigned char *data, int len)
{
int ret;
if ((ret = Port::bridge_rx(data, len)))
return ret;
if (p_tone_name[0])
return -EINVAL;
return audio_send(data, len);
}
int Pgsm::audio_send(unsigned char *data, int len)
{
unsigned char frame[33];
/* record data */
if (p_record)
record(data, len, 1); // from up
if (p_tap)
tap(data, len, 1); // from up
/* encoder init failed */
if (!p_g_fr_encoder)
return -EINVAL;
/* (currently) not connected, so don't flood tch! */
if (!p_g_tch_connected)
return -EINVAL;
/* write to rx buffer */
while(len--) {
p_g_rxdata[p_g_rxpos++] = audio_law_to_s32[*data++];
if (p_g_rxpos != 160)
continue;
p_g_rxpos = 0;
switch (p_g_media_type) {
case MEDIA_TYPE_ANALOG:
frame_send(p_g_rxdata, 320, ANALOG_8000HZ);
break;
case MEDIA_TYPE_GSM:
if (!p_g_fr_encoder) {
PERROR("FR frame, but encoder not created.\n");
break;
}
#ifdef WITH_GSMFR
/* encode data */
gsm_fr_encode(p_g_fr_encoder, p_g_rxdata, frame);
frame_send(frame, 33, GSM_TCHF_FRAME);
#endif
break;
case MEDIA_TYPE_GSM_HR:
if (!p_g_hr_encoder) {
PERROR("HR frame, but encoder not created.\n");
break;
}
#ifdef WITH_GSMHR
/* encode data */
gsm_hr_encode(p_g_hr_encoder, p_g_rxdata, frame);
frame_send(frame, 15, GSM_TCHH_FRAME);
#endif
break;
case MEDIA_TYPE_GSM_EFR:
if (!p_g_amr_encoder) {
PERROR("EFR frame, but encoder not created.\n");
break;
}
#ifdef WITH_GSMAMR
/* encode data */
gsm_efr_encode(p_g_amr_encoder, p_g_rxdata, frame);
frame_send(frame, 31, GSM_TCHF_FRAME_EFR);
#endif
break;
case MEDIA_TYPE_AMR:
if (!p_g_amr_encoder) {
PERROR("AMR frame, but encoder not created.\n");
break;
}
if (!p_g_amr_cmr_valid) {
PDEBUG(DEBUG_GSM, "no valid CMR yet.\n");
break;
}
#ifdef WITH_GSMAMR
/* encode data (prefix a length byte) */
int ret;
ret = gsm_amr_encode(p_g_amr_encoder, p_g_rxdata, frame + 1, p_g_amr_cmr);
frame[0] = ret;
frame_send(frame, ret + 1, GSM_TCH_FRAME_AMR);
#endif
break;
}
}
return 0;
}
void Pgsm::frame_send(void *_frame, int len, int msg_type)
{
unsigned char buffer[sizeof(struct gsm_data_frame) + len];
struct gsm_data_frame *frame = (struct gsm_data_frame *)buffer;
frame->msg_type = msg_type;
frame->callref = p_g_callref;
memcpy(frame->data, _frame, len);
if (p_g_lcr_gsm) {
mncc_send(p_g_lcr_gsm, frame->msg_type, frame);
}
}
/*
* create trace
*/
void gsm_trace_header(const char *interface_name, class Pgsm *port, unsigned int msg_type, int direction)
{
char msgtext[64];
struct interface *interface = interface_first;
interface = getinterfacebyname(interface_name);
if (!interface)
return;
/* select message and primitive text */
SCPY(msgtext, mncc_name(msg_type));
/* add direction */
if (port) {
switch(port->p_type) {
case PORT_TYPE_GSM_BS_OUT:
case PORT_TYPE_GSM_BS_IN:
SCAT(msgtext, " LCR<->BSC");
break;
case PORT_TYPE_GSM_MS_OUT:
case PORT_TYPE_GSM_MS_IN:
SCAT(msgtext, " LCR<->MS");
break;
}
} else
SCAT(msgtext, " ----");
/* init trace with given values */
start_trace(-1,
interface,
port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
port?port->p_dialinginfo.id:NULL,
direction,
CATEGORY_CH,
port?port->p_serial:0,
msgtext);
}
/* modify lchan to given payload type */
void Pgsm::modify_lchan(int media_type)
{
struct gsm_mncc *mode;
/* already modified to that media type */
if (p_g_media_type == media_type)
return;
p_g_media_type = media_type;
gsm_trace_header(p_interface_name, this, MNCC_LCHAN_MODIFY, DIRECTION_OUT);
mode = create_mncc(MNCC_LCHAN_MODIFY, p_g_callref);
switch (media_type) {
case MEDIA_TYPE_GSM_EFR:
add_trace("speech", "version", "EFR given");
mode->lchan_mode = 0x21; /* GSM V2 */
break;
case MEDIA_TYPE_AMR:
add_trace("speech", "version", "AMR given");
mode->lchan_mode = 0x41; /* GSM V3 */
break;
default:
add_trace("speech", "version", "Full/Half Rate given");
mode->lchan_mode = 0x01; /* GSM V1 */
}
mode->lchan_type = 0x02; /* FIXME: unused */
add_trace("mode", NULL, "0x%02x", mode->lchan_mode);
end_trace();
send_and_free_mncc(p_g_lcr_gsm, mode->msg_type, mode);
}
/* CALL PROCEEDING INDICATION (from network) */
void Pgsm::call_proc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct lcr_msg *message;
struct gsm_mncc *frame;
gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
end_trace();
message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_PROCEEDING);
message_put(message);
new_state(PORT_STATE_OUT_PROCEEDING);
if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
end_trace();
frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
p_g_tch_connected = 1;
}
/* modify to GSM FR (this is GSM user side only, so there is FR supported only) */
modify_lchan(MEDIA_TYPE_GSM);
}
/* ALERTING INDICATION */
void Pgsm::alert_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct lcr_msg *message;
struct gsm_mncc *frame;
gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
end_trace();
message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_ALERTING);
message_put(message);
new_state(PORT_STATE_OUT_ALERTING);
if (p_g_earlyb && !p_g_tch_connected) { /* only if ... */
gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
end_trace();
frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
p_g_tch_connected = 1;
}
/* modify to GSM FR, if not already */
if (!p_g_media_type) {
modify_lchan(MEDIA_TYPE_GSM);
}
}
/* CONNECT INDICATION */
void Pgsm::setup_cnf(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct gsm_mncc *resp, *frame;
struct lcr_msg *message;
SCPY(p_connectinfo.id, mncc->connected.number);
SCPY(p_connectinfo.imsi, mncc->imsi);
p_connectinfo.present = INFO_PRESENT_ALLOWED;
p_connectinfo.screen = INFO_SCREEN_NETWORK;
switch (mncc->connected.type) {
case 0x1:
p_connectinfo.ntype = INFO_NTYPE_INTERNATIONAL;
break;
case 0x2:
p_connectinfo.ntype = INFO_NTYPE_NATIONAL;
break;
case 0x4:
p_connectinfo.ntype = INFO_NTYPE_SUBSCRIBER;
break;
default:
p_connectinfo.ntype = INFO_NTYPE_UNKNOWN;
break;
}
SCPY(p_connectinfo.interface, p_interface_name);
gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
if (p_connectinfo.id[0])
add_trace("connect", "number", "%s", p_connectinfo.id);
else if (mncc->imsi[0])
SPRINT(p_connectinfo.id, "imsi-%s", p_connectinfo.imsi);
if (mncc->imsi[0])
add_trace("connect", "imsi", "%s", p_connectinfo.imsi);
end_trace();
/* send resp */
gsm_trace_header(p_interface_name, this, MNCC_SETUP_COMPL_REQ, DIRECTION_OUT);
resp = create_mncc(MNCC_SETUP_COMPL_REQ, p_g_callref);
end_trace();
send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
new_state(PORT_STATE_CONNECT);
if (!p_g_tch_connected) { /* only if ... */
gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
end_trace();
frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
p_g_tch_connected = 1;
}
message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_CONNECT);
memcpy(&message->param.connectinfo, &p_connectinfo, sizeof(struct connect_info));
/* if we have a bridge, but not yet modified, the phone accepts out requested payload.
* we force the first in list */
if (p_g_rtp_bridge) {
if (!p_g_media_type) {
/* modify to first given type */
modify_lchan(p_g_rtp_media_types[0]);
/* also set payload type */
p_g_payload_type = p_g_rtp_payload_types[0];
}
message->param.connectinfo.rtpinfo.media_types[0] = p_g_media_type;
message->param.connectinfo.rtpinfo.payload_types[0] = p_g_payload_type;
message->param.connectinfo.rtpinfo.payloads = 1;
} else {
/* modify to GSM FR, if not already
* for network side, this should have been already happened */
if (!p_g_media_type)
modify_lchan(MEDIA_TYPE_GSM);
}
if (p_g_rtp_bridge) {
struct gsm_mncc_rtp *rtp;
PDEBUG(DEBUG_GSM, "Request RTP peer info, before forwarding connect msg\n");
p_g_connect_pending = message;
rtp = (struct gsm_mncc_rtp *) create_mncc(MNCC_RTP_CREATE, p_g_callref);
send_and_free_mncc(p_g_lcr_gsm, rtp->msg_type, rtp);
} else
message_put(message);
}
/* CONNECT ACK INDICATION */
void Pgsm::setup_compl_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct gsm_mncc *frame;
gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
end_trace();
new_state(PORT_STATE_CONNECT);
if (!p_g_tch_connected) { /* only if ... */
gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
end_trace();
frame = create_mncc(MNCC_FRAME_RECV, p_g_callref);
send_and_free_mncc(p_g_lcr_gsm, frame->msg_type, frame);
p_g_tch_connected = 1;
}
/* modify to GSM FR, if not already */
if (!p_g_media_type) {
modify_lchan(MEDIA_TYPE_GSM);
}
}
/* DISCONNECT INDICATION */
void Pgsm::disc_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct lcr_msg *message;
int cause = 16, location = 0;
struct gsm_mncc *resp;
gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
if (mncc->fields & MNCC_F_CAUSE) {
location = mncc->cause.location;
cause = mncc->cause.value;
add_trace("cause", "coding", "%d", mncc->cause.coding);
add_trace("cause", "location", "%d", location);
add_trace("cause", "value", "%d", cause);
}
end_trace();
/* send release */
resp = create_mncc(MNCC_REL_REQ, p_g_callref);
gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
#if 0
resp->fields |= MNCC_F_CAUSE;
resp->cause.coding = 3;
resp->cause.location = 1;
resp->cause.value = cause;
add_trace("cause", "coding", "%d", resp->cause.coding);
add_trace("cause", "location", "%d", resp->cause.location);
add_trace("cause", "value", "%d", resp->cause.value);
#endif
end_trace();
send_and_free_mncc(p_g_lcr_gsm, resp->msg_type, resp);
/* sending release to endpoint */
while(p_epointlist) {
message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = cause;
message->param.disconnectinfo.location = location;
message_put(message);
/* remove epoint */
free_epointlist(p_epointlist);
}
new_state(PORT_STATE_RELEASE);
trigger_work(&p_g_delete);
}
/* CC_RELEASE INDICATION */
void Pgsm::rel_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
int location = 0, cause = 16;
struct lcr_msg *message;
gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
if (mncc->fields & MNCC_F_CAUSE) {
location = mncc->cause.location;
cause = mncc->cause.value;
add_trace("cause", "coding", "%d", mncc->cause.coding);
add_trace("cause", "location", "%d", mncc->cause.location);
add_trace("cause", "value", "%d", mncc->cause.value);
}
end_trace();
/* sending release to endpoint */
while(p_epointlist) {
message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = cause;
message->param.disconnectinfo.location = location;
message_put(message);
/* remove epoint */
free_epointlist(p_epointlist);
}
new_state(PORT_STATE_RELEASE);
trigger_work(&p_g_delete);
}
/* NOTIFY INDICATION */
void Pgsm::notify_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct lcr_msg *message;
gsm_trace_header(p_interface_name, this, msg_type, DIRECTION_IN);
add_trace("notify", NULL, "%d", mncc->notify);
end_trace();
message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_NOTIFY);
message->param.notifyinfo.notify = mncc->notify;
message_put(message);
}
/* MESSAGE_NOTIFY */
void Pgsm::message_notify(unsigned int epoint_id, int message_id, union parameter *param)
{
struct gsm_mncc *mncc;
int notify;
// printf("if = %d\n", param->notifyinfo.notify);
if (param->notifyinfo.notify>INFO_NOTIFY_NONE) {
notify = param->notifyinfo.notify & 0x7f;
if (p_state!=PORT_STATE_CONNECT /*&& p_state!=PORT_STATE_IN_PROCEEDING*/ && p_state!=PORT_STATE_IN_ALERTING) {
/* queue notification */
if (p_g_notify_pending)
message_free(p_g_notify_pending);
p_g_notify_pending = message_create(ACTIVE_EPOINT(p_epointlist), p_serial, EPOINT_TO_PORT, message_id);
memcpy(&p_g_notify_pending->param, param, sizeof(union parameter));
} else {
/* sending notification */
gsm_trace_header(p_interface_name, this, MNCC_NOTIFY_REQ, DIRECTION_OUT);
add_trace("notify", NULL, "%d", notify);
end_trace();
mncc = create_mncc(MNCC_NOTIFY_REQ, p_g_callref);
mncc->notify = notify;
send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
}
}
}
/* RTP create indication */
void Pgsm::rtp_create_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
/* send queued setup, as we received remote RTP info */
if (p_g_setup_pending) {
struct lcr_msg *message;
message = p_g_setup_pending;
PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding setup\n", rtp->ip, rtp->port);
message->param.setup.rtpinfo.ip = rtp->ip;
message->param.setup.rtpinfo.port = rtp->port;
message_put(message);
p_g_setup_pending = NULL;
}
if (p_g_connect_pending) {
PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) connecting RTP... \n", rtp->ip, rtp->port);
send_mncc_rtp_connect();
}
}
/* RTP connect indication */
void Pgsm::rtp_connect_ind(unsigned int msg_type, unsigned int callref, struct gsm_mncc *mncc)
{
struct lcr_msg *message;
struct gsm_mncc_rtp *rtp = (struct gsm_mncc_rtp *) mncc;
if (p_g_connect_pending) {
message = p_g_connect_pending;
PDEBUG(DEBUG_GSM, "Got RTP peer info (%08x,%d) forwarding connect\n", rtp->ip, rtp->port);
message->param.connectinfo.rtpinfo.ip = rtp->ip;
message->param.connectinfo.rtpinfo.port = rtp->port;
message_put(message);
p_g_connect_pending = NULL;
}
}
/* MESSAGE_PROGRESS */
void Pgsm::message_progress(unsigned int epoint_id, int message_id, union parameter *param)
{
if (param->progressinfo.progress == 8) {
PDEBUG(DEBUG_GSM, "Remote provides tones for us\n");
p_g_tones = 1;
}
if (param->progressinfo.rtpinfo.port) {
PDEBUG(DEBUG_GSM, "PROGRESS with RTP peer info, sent to BSC (%08x,%d) with media %d, pt %d\n", param->progressinfo.rtpinfo.ip, param->progressinfo.rtpinfo.port, param->progressinfo.rtpinfo.media_types[0], param->progressinfo.rtpinfo.payload_types[0]);
/* modify channel to givne type, also sets media type */
modify_lchan(param->progressinfo.rtpinfo.media_types[0]);
/* connect RTP */
p_g_rtp_ip_remote = param->progressinfo.rtpinfo.ip;
p_g_rtp_port_remote = param->progressinfo.rtpinfo.port;
/* p_g_media_type is already set by modify_lchan() */
p_g_payload_type = param->progressinfo.rtpinfo.payload_types[0];
send_mncc_rtp_connect();
}
}
/* MESSAGE_ALERTING */
void Pgsm::message_alerting(unsigned int epoint_id, int message_id, union parameter *param)
{
struct gsm_mncc *mncc;
/* send alert */
gsm_trace_header(p_interface_name, this, MNCC_ALERT_REQ, DIRECTION_OUT);
mncc = create_mncc(MNCC_ALERT_REQ, p_g_callref);
if (p_g_tones) {
mncc->fields |= MNCC_F_PROGRESS;
mncc->progress.coding = 3; /* GSM */
mncc->progress.location = 1;
mncc->progress.descr = 8;
add_trace("progress", "coding", "%d", mncc->progress.coding);
add_trace("progress", "location", "%d", mncc->progress.location);
add_trace("progress", "descr", "%d", mncc->progress.descr);
}
end_trace();
send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
new_state(PORT_STATE_IN_ALERTING);
if (p_g_tones && !p_g_tch_connected) { /* only if ... */
gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
end_trace();
mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
p_g_tch_connected = 1;
}
/* modify to GSM FR, if not already */
if (!p_g_media_type) {
modify_lchan(MEDIA_TYPE_GSM);
}
}
/* MESSAGE_CONNECT */
void Pgsm::message_connect(unsigned int epoint_id, int message_id, union parameter *param)
{
struct gsm_mncc *mncc;
/* copy connected information */
memcpy(&p_connectinfo, &param->connectinfo, sizeof(p_connectinfo));
/* screen outgoing caller id */
do_screen(1, p_connectinfo.id, sizeof(p_connectinfo.id), &p_connectinfo.ntype, &p_connectinfo.present, p_interface_name);
/* send connect */
mncc = create_mncc(MNCC_SETUP_RSP, p_g_callref);
gsm_trace_header(p_interface_name, this, MNCC_SETUP_RSP, DIRECTION_OUT);
/* caller information */
mncc->fields |= MNCC_F_CONNECTED;
mncc->connected.plan = 1;
switch (p_callerinfo.ntype) {
case INFO_NTYPE_UNKNOWN:
mncc->connected.type = 0x0;
break;
case INFO_NTYPE_INTERNATIONAL:
mncc->connected.type = 0x1;
break;
case INFO_NTYPE_NATIONAL:
mncc->connected.type = 0x2;
break;
case INFO_NTYPE_SUBSCRIBER:
mncc->connected.type = 0x4;
break;
default: /* INFO_NTYPE_NOTPRESENT */
mncc->fields &= ~MNCC_F_CONNECTED;
break;
}
switch (p_callerinfo.screen) {
case INFO_SCREEN_USER:
mncc->connected.screen = 0;
break;
default: /* INFO_SCREEN_NETWORK */
mncc->connected.screen = 3;
break;
}
switch (p_callerinfo.present) {
case INFO_PRESENT_ALLOWED:
mncc->connected.present = 0;
break;
case INFO_PRESENT_RESTRICTED:
mncc->connected.present = 1;
break;
default: /* INFO_PRESENT_NOTAVAIL */
mncc->connected.present = 2;
break;
}
if (mncc->fields & MNCC_F_CONNECTED) {
SCPY(mncc->connected.number, p_connectinfo.id);
add_trace("connected", "type", "%d", mncc->connected.type);
add_trace("connected", "plan", "%d", mncc->connected.plan);
add_trace("connected", "present", "%d", mncc->connected.present);
add_trace("connected", "screen", "%d", mncc->connected.screen);
add_trace("connected", "number", "%s", mncc->connected.number);
}
end_trace();
send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
new_state(PORT_STATE_CONNECT_WAITING);
if (param->connectinfo.rtpinfo.port) {
PDEBUG(DEBUG_GSM, "CONNECT with RTP peer info, sent to BSC (%08x,%d)\n", param->connectinfo.rtpinfo.ip, param->connectinfo.rtpinfo.port);
/* modify channel to givne type, also sets media type */
modify_lchan(param->connectinfo.rtpinfo.media_types[0]);
/* connect RTP */
p_g_rtp_ip_remote = param->connectinfo.rtpinfo.ip;
p_g_rtp_port_remote = param->connectinfo.rtpinfo.port;
/* p_g_media_type is already set by modify_lchan() */
p_g_payload_type = param->connectinfo.rtpinfo.payload_types[0];
send_mncc_rtp_connect();
}
}
/* MESSAGE_DISCONNECT */
void Pgsm::message_disconnect(unsigned int epoint_id, int message_id, union parameter *param)
{
struct gsm_mncc *mncc;
/* send disconnect */
mncc = create_mncc(MNCC_DISC_REQ, p_g_callref);
gsm_trace_header(p_interface_name, this, MNCC_DISC_REQ, DIRECTION_OUT);
if (p_g_tones) {
mncc->fields |= MNCC_F_PROGRESS;
mncc->progress.coding = 3; /* GSM */
mncc->progress.location = 1;
mncc->progress.descr = 8;
add_trace("progress", "coding", "%d", mncc->progress.coding);
add_trace("progress", "location", "%d", mncc->progress.location);
add_trace("progress", "descr", "%d", mncc->progress.descr);
}
mncc->fields |= MNCC_F_CAUSE;
mncc->cause.coding = 3;
mncc->cause.location = param->disconnectinfo.location;
mncc->cause.value = param->disconnectinfo.cause;
add_trace("cause", "coding", "%d", mncc->cause.coding);
add_trace("cause", "location", "%d", mncc->cause.location);
add_trace("cause", "value", "%d", mncc->cause.value);
end_trace();
send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
new_state(PORT_STATE_OUT_DISCONNECT);
if (p_g_tones && !p_g_tch_connected) { /* only if ... */
gsm_trace_header(p_interface_name, this, MNCC_FRAME_RECV, DIRECTION_OUT);
end_trace();
mncc = create_mncc(MNCC_FRAME_RECV, p_g_callref);
send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
p_g_tch_connected = 1;
}
}
/* MESSAGE_RELEASE */
void Pgsm::message_release(unsigned int epoint_id, int message_id, union parameter *param)
{
struct gsm_mncc *mncc;
/* send release */
mncc = create_mncc(MNCC_REL_REQ, p_g_callref);
gsm_trace_header(p_interface_name, this, MNCC_REL_REQ, DIRECTION_OUT);
mncc->fields |= MNCC_F_CAUSE;
mncc->cause.coding = 3;
mncc->cause.location = param->disconnectinfo.location;
mncc->cause.value = param->disconnectinfo.cause;
add_trace("cause", "coding", "%d", mncc->cause.coding);
add_trace("cause", "location", "%d", mncc->cause.location);
add_trace("cause", "value", "%d", mncc->cause.value);
end_trace();
send_and_free_mncc(p_g_lcr_gsm, mncc->msg_type, mncc);
new_state(PORT_STATE_RELEASE);
trigger_work(&p_g_delete);
return;
}
/*
* endpoint sends messages to the port
*/
int Pgsm::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
{
int ret = 0;
if (Port::message_epoint(epoint_id, message_id, param))
return 1;
switch(message_id) {
case MESSAGE_NOTIFY: /* display and notifications */
ret = 1;
message_notify(epoint_id, message_id, param);
break;
// case MESSAGE_FACILITY: /* facility message */
// message_facility(epoint_id, message_id, param);
// break;
case MESSAGE_PROCEEDING: /* message not handles */
ret = 1;
break;
case MESSAGE_PROGRESS:
ret = 1;
message_progress(epoint_id, message_id, param);
break;
case MESSAGE_ALERTING: /* call of endpoint is ringing */
ret = 1;
if (p_state!=PORT_STATE_IN_PROCEEDING)
break;
message_alerting(epoint_id, message_id, param);
if (p_g_notify_pending) {
/* send pending notify message during connect */
message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
message_free(p_g_notify_pending);
p_g_notify_pending = NULL;
}
break;
case MESSAGE_CONNECT: /* call of endpoint is connected */
ret = 1;
if (p_state!=PORT_STATE_IN_PROCEEDING
&& p_state!=PORT_STATE_IN_ALERTING)
break;
message_connect(epoint_id, message_id, param);
if (p_g_notify_pending) {
/* send pending notify message during connect */
message_notify(ACTIVE_EPOINT(p_epointlist), p_g_notify_pending->type, &p_g_notify_pending->param);
message_free(p_g_notify_pending);
p_g_notify_pending = NULL;
}
break;
case MESSAGE_DISCONNECT: /* call has been disconnected */
ret = 1;
if (p_state!=PORT_STATE_IN_PROCEEDING
&& p_state!=PORT_STATE_IN_ALERTING
&& p_state!=PORT_STATE_OUT_SETUP
&& p_state!=PORT_STATE_OUT_OVERLAP
&& p_state!=PORT_STATE_OUT_PROCEEDING
&& p_state!=PORT_STATE_OUT_ALERTING
&& p_state!=PORT_STATE_CONNECT
&& p_state!=PORT_STATE_CONNECT_WAITING)
break;
message_disconnect(epoint_id, message_id, param);
break;
case MESSAGE_RELEASE: /* release isdn port */
ret = 1;
if (p_state==PORT_STATE_RELEASE)
break;
message_release(epoint_id, message_id, param);
break;
}
return ret;
}
/* deletes only if l3id is release, otherwhise it will be triggered then */
static int delete_event(struct lcr_work *work, void *instance, int index)
{
class Pgsm *gsmport = (class Pgsm *)instance;
delete gsmport;
return 0;
}
int gsm_exit(int rc)
{
return(rc);
}
int gsm_init(void)
{
/* seed the PRNG */
srand(time(NULL));
return 0;
}
/*
* MNCC interface
*/
static int mncc_q_enqueue(struct lcr_gsm *lcr_gsm, struct gsm_mncc *mncc, unsigned int len)
{
struct mncc_q_entry *qe;
qe = (struct mncc_q_entry *) MALLOC(sizeof(*qe)+sizeof(*mncc)+len);
if (!qe)
return -ENOMEM;
qe->next = NULL;
qe->len = len;
memcpy(qe->data, mncc, len);
/* in case of empty list ... */
if (!lcr_gsm->mncc_q_hd && !lcr_gsm->mncc_q_tail) {
/* the list head and tail both point to the new qe */
lcr_gsm->mncc_q_hd = lcr_gsm->mncc_q_tail = qe;
} else {
/* append to tail of list */
lcr_gsm->mncc_q_tail->next = qe;
lcr_gsm->mncc_q_tail = qe;
}
lcr_gsm->mncc_lfd.when |= LCR_FD_WRITE;
return 0;
}
static struct mncc_q_entry *mncc_q_dequeue(struct lcr_gsm *lcr_gsm)
{
struct mncc_q_entry *qe = lcr_gsm->mncc_q_hd;
if (!qe)
return NULL;
/* dequeue the successfully sent message */
lcr_gsm->mncc_q_hd = qe->next;
if (!qe)
return NULL;
if (qe == lcr_gsm->mncc_q_tail)
lcr_gsm->mncc_q_tail = NULL;
return qe;
}
/* routine called by LCR code if it wants to send a message to OpenBSC */
static int mncc_send(struct lcr_gsm *lcr_gsm, int msg_type, void *data)
{
int len = 0;
/* FIXME: the caller should provide this */
switch (msg_type) {
case ANALOG_8000HZ:
len = sizeof(struct gsm_data_frame) + 320;
break;
case GSM_TCHF_FRAME:
len = sizeof(struct gsm_data_frame) + 33;
break;
default:
len = sizeof(struct gsm_mncc);
break;
}
return mncc_q_enqueue(lcr_gsm, (struct gsm_mncc *)data, len);
}
/* close MNCC socket */
static int mncc_fd_close(struct lcr_gsm *lcr_gsm, struct lcr_fd *lfd)
{
class Port *port;
class Pgsm *pgsm = NULL;
struct lcr_msg *message;
PERROR("Lost MNCC socket, retrying in %u seconds\n", SOCKET_RETRY_TIMER);
close(lfd->fd);
unregister_fd(lfd);
lfd->fd = -1;
/* free all the calls that were running through the MNCC interface */
port = port_first;
while(port) {
if ((port->p_type & PORT_CLASS_MASK) == PORT_CLASS_GSM) {
pgsm = (class Pgsm *)port;
if (pgsm->p_g_lcr_gsm == lcr_gsm) {
message = message_create(pgsm->p_serial, ACTIVE_EPOINT(pgsm->p_epointlist), PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = 41; // temp. fail.
message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
message_put(message);
pgsm->new_state(PORT_STATE_RELEASE);
trigger_work(&pgsm->p_g_delete);
}
}
port = port->next;
}
/* flush the queue */
while (mncc_q_dequeue(lcr_gsm))
;
/* start the re-connect timer */
schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
return 0;
}
/* write to OpenBSC via MNCC socket */
static int mncc_fd_write(struct lcr_fd *lfd, void *inst, int idx)
{
struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
struct mncc_q_entry *qe, *qe2;
int rc;
while (1) {
qe = lcr_gsm->mncc_q_hd;
if (!qe) {
lfd->when &= ~LCR_FD_WRITE;
break;
}
rc = write(lfd->fd, qe->data, qe->len);
if (rc == 0)
return mncc_fd_close(lcr_gsm, lfd);
if (rc < 0)
return rc;
if (rc < (int)qe->len)
return -1;
/* dequeue the successfully sent message */
qe2 = mncc_q_dequeue(lcr_gsm);
assert(qe == qe2);
free(qe);
}
return 0;
}
/* read from OpenBSC via MNCC socket */
static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
{
struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
int rc;
static char buf[sizeof(struct gsm_mncc)+1024];
struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
struct gsm_mncc_hello *hello = (struct gsm_mncc_hello *) buf;
class Port *port;
class Pgsm *pgsm = NULL;
unsigned int callref;
memset(buf, 0, sizeof(buf));
rc = recv(lfd->fd, buf, sizeof(buf), 0);
if (rc == 0)
return mncc_fd_close(lcr_gsm, lfd);
if (rc < 0)
return rc;
/* TODO: size check? */
switch (mncc_prim->msg_type) {
case MNCC_SOCKET_HELLO:
if (hello->version != MNCC_SOCK_VERSION) {
PERROR("MNCC version different. BSC version is %u\n", hello->version);
mncc_fd_close(lcr_gsm, lfd);
return 0;
}
if (hello->mncc_size != sizeof(struct gsm_mncc)) {
PERROR("MNCC gsm_mncc size differs: %u %u\n",
hello->mncc_size, sizeof(struct gsm_mncc));
mncc_fd_close(lcr_gsm, lfd);
return 0;
}
if (hello->data_frame_size != sizeof(struct gsm_data_frame)) {
PERROR("MNCC gsm_mncc size differs: %u %u\n",
hello->data_frame_size, sizeof(struct gsm_data_frame));
mncc_fd_close(lcr_gsm, lfd);
return 0;
}
#define CHECK_OFFSET(hello, field, lcr_gsm, lfd) \
if (hello->field ##_offset != __builtin_offsetof(struct gsm_mncc, field)) { \
PERROR("MNCC gsm_mncc offset of %s is %u %u\n", \
#field, hello->field ##_offset, \
__builtin_offsetof(struct gsm_mncc, field)); \
mncc_fd_close(lcr_gsm, lfd); \
return 0; \
}
CHECK_OFFSET(hello, called, lcr_gsm, lfd);
CHECK_OFFSET(hello, signal, lcr_gsm, lfd);
CHECK_OFFSET(hello, emergency, lcr_gsm, lfd);
CHECK_OFFSET(hello, lchan_type, lcr_gsm, lfd);
#undef CHECK_OFFSET
break;
}
/* Find port object */
callref = mncc_prim->callref;
port = port_first;
while(port) {
if ((port->p_type & PORT_CLASS_MASK) == PORT_CLASS_GSM) {
pgsm = (class Pgsm *)port;
if (pgsm->p_g_lcr_gsm == lcr_gsm && pgsm->p_g_callref == callref)
break;
}
port = port->next;
}
/* Hand the MNCC message into LCR */
switch (lcr_gsm->type) {
#ifdef WITH_GSM_BS
case LCR_GSM_TYPE_NETWORK:
if (port && (port->p_type & PORT_CLASS_GSM_MASK) != PORT_CLASS_GSM_BS)
FATAL("Port is set and bound to network socket, but is not of network type, please fix");
return message_bsc((class Pgsm_bs *)port, lcr_gsm, mncc_prim->msg_type, mncc_prim);
#endif
#ifdef WITH_GSM_MS
case LCR_GSM_TYPE_MS:
if (port && (port->p_type & PORT_CLASS_GSM_MASK) != PORT_CLASS_GSM_MS)
FATAL("Port is set and bound to mobile socket, but is not of mobile type, please fix");
return message_ms((class Pgsm_ms *)port, lcr_gsm, mncc_prim->msg_type, mncc_prim);
#endif
default:
return 0;
}
}
/* file descriptor callback if we can read or write form MNCC socket */
static int mncc_fd_cb(struct lcr_fd *lfd, unsigned int what, void *inst, int idx)
{
int rc = 0;
if (what & LCR_FD_READ)
rc = mncc_fd_read(lfd, inst, idx);
if (rc < 0)
return rc;
if (what & LCR_FD_WRITE)
rc = mncc_fd_write(lfd, inst, idx);
return rc;
}
int mncc_socket_retry_cb(struct lcr_timer *timer, void *inst, int index)
{
struct lcr_gsm *lcr_gsm = (struct lcr_gsm *) inst;
int fd, rc;
lcr_gsm->mncc_lfd.fd = -1;
fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
if (fd < 0) {
PERROR("Cannot create SEQPACKET socket, giving up!\n");
return fd;
}
rc = connect(fd, (struct sockaddr *) &lcr_gsm->sun,
sizeof(lcr_gsm->sun));
if (rc < 0) {
PERROR("Could not connect to MNCC socket %s, "
"retrying in %u seconds\n", lcr_gsm->sun.sun_path,
SOCKET_RETRY_TIMER);
close(fd);
schedule_timer(&lcr_gsm->socket_retry, SOCKET_RETRY_TIMER, 0);
} else {
PDEBUG(DEBUG_GSM, "Connected to MNCC socket %s!\n", lcr_gsm->sun.sun_path);
lcr_gsm->mncc_lfd.fd = fd;
register_fd(&lcr_gsm->mncc_lfd, LCR_FD_READ, &mncc_fd_cb, lcr_gsm, 0);
}
return 0;
}
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