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osmocom-bb/src/host/layer23/src/mobile/gsm48_cc.c

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/*
* (C) 2010 by Andreas Eversberg <jolly@eversberg.eu>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <stdint.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/utils.h>
#include <osmocom/gsm/gsm48.h>
#include <osmocom/core/talloc.h>
#include <osmocom/bb/common/logging.h>
#include <osmocom/bb/common/osmocom_data.h>
#include <osmocom/bb/mobile/mncc.h>
#include <osmocom/bb/mobile/transaction.h>
#include <osmocom/bb/mobile/gsm48_cc.h>
#include <osmocom/bb/mobile/voice.h>
#include <l1ctl_proto.h>
static int gsm48_cc_tx_release(struct gsm_trans *trans, void *arg);
static int gsm48_rel_null_free(struct gsm_trans *trans);
int mncc_release_ind(struct osmocom_ms *ms, struct gsm_trans *trans,
uint32_t callref, int location, int value);
static int gsm48_cc_tx_disconnect(struct gsm_trans *trans, void *arg);
static int gsm48_cc_tx_connect_ack(struct gsm_trans *trans, void *arg);
/*
* init
*/
int gsm48_cc_init(struct osmocom_ms *ms)
{
struct gsm48_cclayer *cc = &ms->cclayer;
cc->ms = ms;
if (!cc->mncc_upqueue.next == 0)
return 0;
LOGP(DCC, LOGL_INFO, "init Call Control\n");
INIT_LLIST_HEAD(&cc->mncc_upqueue);
return 0;
}
int gsm48_cc_exit(struct osmocom_ms *ms)
{
struct gsm48_cclayer *cc = &ms->cclayer;
struct gsm_trans *trans, *trans2;
struct msgb *msg;
LOGP(DCC, LOGL_INFO, "exit Call Control processes for %s\n", ms->name);
llist_for_each_entry_safe(trans, trans2, &ms->trans_list, entry) {
if (trans->protocol == GSM48_PDISC_CC) {
LOGP(DCC, LOGL_NOTICE, "Free pendig CC-transaction.\n");
trans_free(trans);
}
}
while ((msg = msgb_dequeue(&cc->mncc_upqueue)))
msgb_free(msg);
return 0;
}
/*
* messages
*/
/* names of MNCC-SAP */
static const struct value_string gsm_mncc_names[] = {
{ 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_FRAME_RECV, "MNCC_FRAME_RECV" },
{ MNCC_FRAME_DROP, "MNCC_FRAME_DROP" },
{ MNCC_LCHAN_MODIFY, "MNCC_LCHAN_MODIFY" },
{ 0, NULL }
};
const char *get_mncc_name(int value)
{
return get_value_string(gsm_mncc_names, value);
}
/* push MMCC header and send to MM */
static int gsm48_cc_to_mm(struct msgb *msg, struct gsm_trans *trans,
int msg_type)
{
struct gsm48_hdr *gh = msgb_l3(msg);
struct gsm48_mmxx_hdr *mmh;
int emergency = 0;
/* Add protocol type and transaction ID */
gh->proto_discr = trans->protocol | (trans->transaction_id << 4);
/* indicate emergency setup to MM layer */
if (gh->msg_type == GSM48_MT_CC_EMERG_SETUP)
emergency = 1;
/* push RR header */
msgb_push(msg, sizeof(struct gsm48_mmxx_hdr));
mmh = (struct gsm48_mmxx_hdr *)msg->data;
mmh->msg_type = msg_type;
mmh->ref = trans->callref;
mmh->transaction_id = trans->transaction_id;
mmh->sapi = 0;
mmh->emergency = emergency;
/* send message to MM */
LOGP(DCC, LOGL_INFO, "Sending '%s' using %s (callref=%x, "
"transaction_id=%d)\n", gsm48_cc_msg_name(gh->msg_type),
get_mmxx_name(msg_type), trans->callref, trans->transaction_id);
return gsm48_mmxx_downmsg(trans->ms, msg);
}
/* enqueue message to application (MNCC-SAP) */
static int mncc_recvmsg(struct osmocom_ms *ms, struct gsm_trans *trans,
int msg_type, struct gsm_mncc *mncc)
{
struct gsm48_cclayer *cc = &ms->cclayer;
struct msgb *msg;
if (trans)
LOGP(DCC, LOGL_INFO, "(ms %s ti %x) Sending '%s' to MNCC.\n",
ms->name, trans->transaction_id,
get_mncc_name(msg_type));
else
LOGP(DCC, LOGL_INFO, "(ms %s ti -) Sending '%s' to MNCC.\n",
ms->name, get_mncc_name(msg_type));
mncc->msg_type = msg_type;
msg = msgb_alloc(sizeof(struct gsm_mncc), "MNCC");
if (!msg)
return -ENOMEM;
memcpy(msg->data, mncc, sizeof(struct gsm_mncc));
msgb_enqueue(&cc->mncc_upqueue, msg);
return 0;
}
/* dequeue messages to layer 4 */
int mncc_dequeue(struct osmocom_ms *ms)
{
struct gsm48_cclayer *cc = &ms->cclayer;
struct gsm_mncc *mncc;
struct msgb *msg;
int work = 0;
while ((msg = msgb_dequeue(&cc->mncc_upqueue))) {
mncc = (struct gsm_mncc *)msg->data;
if (ms->mncc_entity.mncc_recv)
ms->mncc_entity.mncc_recv(ms, mncc->msg_type, mncc);
work = 1; /* work done */
msgb_free(msg);
}
return work;
}
/*
* state transition
*/
static void new_cc_state(struct gsm_trans *trans, int state)
{
if (state > 31 || state < 0)
return;
DEBUGP(DCC, "new state %s -> %s\n",
gsm48_cc_state_name(trans->cc.state),
gsm48_cc_state_name(state));
trans->cc.state = state;
}
/*
* timers
*/
/* timeout events of all timers */
static void gsm48_cc_timeout(void *arg)
{
struct gsm_trans *trans = arg;
int disconnect = 0, release = 0, abort = 1;
int mo_cause = GSM48_CC_CAUSE_RECOVERY_TIMER;
int mo_location = GSM48_CAUSE_LOC_PRN_S_LU;
int l4_cause = GSM48_CC_CAUSE_NORMAL_UNSPEC;
int l4_location = GSM48_CAUSE_LOC_PRN_S_LU;
struct gsm_mncc mo_rel, l4_rel;
memset(&mo_rel, 0, sizeof(struct gsm_mncc));
mo_rel.callref = trans->callref;
memset(&l4_rel, 0, sizeof(struct gsm_mncc));
l4_rel.callref = trans->callref;
LOGP(DCC, LOGL_INFO, "Timer T%x has fired.\n", trans->cc.Tcurrent);
switch(trans->cc.Tcurrent) {
case 0x303:
/* abort if connection is not already esablished */
if (trans->cc.state == GSM_CSTATE_MM_CONNECTION_PEND)
abort = 1;
else
release = 1;
l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND;
break;
case 0x305:
release = 1;
mo_cause = trans->cc.msg.cause.value;
mo_location = trans->cc.msg.cause.location;
break;
case 0x308:
if (!trans->cc.T308_second) {
/* restart T308 a second time */
gsm48_cc_tx_release(trans, &trans->cc.msg);
trans->cc.T308_second = 1;
break; /* stay in release state */
}
/* release MM conn, got NULL state, free trans */
gsm48_rel_null_free(trans);
return;
case 0x310:
disconnect = 1;
l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND;
break;
case 0x313:
disconnect = 1;
/* unknown, did not find it in the specs */
break;
default:
release = 1;
}
if ((release || abort) && trans->callref) {
/* process release towards layer 4 */
mncc_release_ind(trans->ms, trans, trans->callref,
l4_location, l4_cause);
}
if (disconnect && trans->callref) {
/* process disconnect towards layer 4 */
mncc_set_cause(&l4_rel, l4_location, l4_cause);
mncc_recvmsg(trans->ms, trans, MNCC_DISC_IND, &l4_rel);
}
/* process disconnect towards mobile station */
if (disconnect || release || abort) {
mncc_set_cause(&mo_rel, mo_location, mo_cause);
mo_rel.cause.diag[0] =
((trans->cc.Tcurrent & 0xf00) >> 8) + '0';
mo_rel.cause.diag[1] =
((trans->cc.Tcurrent & 0x0f0) >> 4) + '0';
mo_rel.cause.diag[2] = (trans->cc.Tcurrent & 0x00f) + '0';
mo_rel.cause.diag_len = 3;
if (disconnect)
gsm48_cc_tx_disconnect(trans, &mo_rel);
if (release)
gsm48_cc_tx_release(trans, &mo_rel);
if (abort) {
/* release MM conn, got NULL state, free trans */
gsm48_rel_null_free(trans);
}
}
}
/* start various timers */
static void gsm48_start_cc_timer(struct gsm_trans *trans, int current,
int sec, int micro)
{
LOGP(DCC, LOGL_INFO, "starting timer T%x with %d seconds\n", current,
sec);
trans->cc.timer.cb = gsm48_cc_timeout;
trans->cc.timer.data = trans;
osmo_timer_schedule(&trans->cc.timer, sec, micro);
trans->cc.Tcurrent = current;
}
/* stop various timers */
static void gsm48_stop_cc_timer(struct gsm_trans *trans)
{
if (osmo_timer_pending(&trans->cc.timer)) {
LOGP(DCC, LOGL_INFO, "stopping pending timer T%x\n",
trans->cc.Tcurrent);
osmo_timer_del(&trans->cc.timer);
trans->cc.Tcurrent = 0;
}
}
/*
* process handlers (misc)
*/
/* Call Control Specific transaction release.
* gets called by trans_free, DO NOT CALL YOURSELF!
*/
void _gsm48_cc_trans_free(struct gsm_trans *trans)
{
gsm48_stop_cc_timer(trans);
/* disable audio distribution */
if (trans->ms->mncc_entity.ref == trans->callref)
trans->ms->mncc_entity.ref = 0;
/* send release to L4, if callref still exists */
if (trans->callref) {
/* Ressource unavailable */
mncc_release_ind(trans->ms, trans, trans->callref,
GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
}
if (trans->cc.state != GSM_CSTATE_NULL)
new_cc_state(trans, GSM_CSTATE_NULL);
}
/* release MM connection, go NULL state, free transaction */
static int gsm48_rel_null_free(struct gsm_trans *trans)
{
struct msgb *nmsg;
/* release MM connection */
nmsg = gsm48_mmxx_msgb_alloc(GSM48_MMCC_REL_REQ, trans->callref,
trans->transaction_id, 0);
if (!nmsg)
return -ENOMEM;
LOGP(DCC, LOGL_INFO, "Sending MMCC_REL_REQ\n");
gsm48_mmxx_downmsg(trans->ms, nmsg);
new_cc_state(trans, GSM_CSTATE_NULL);
trans->callref = 0;
trans_free(trans);
return 0;
}
void mncc_set_cause(struct gsm_mncc *data, int loc, int val)
{
data->fields |= MNCC_F_CAUSE;
data->cause.coding = 0x3;
data->cause.location = loc;
data->cause.value = val;
}
/* send release indication to upper layer */
int mncc_release_ind(struct osmocom_ms *ms, struct gsm_trans *trans,
uint32_t callref, int location, int value)
{
struct gsm_mncc rel;
memset(&rel, 0, sizeof(rel));
rel.callref = callref;
mncc_set_cause(&rel, location, value);
return mncc_recvmsg(ms, trans, MNCC_REL_IND, &rel);
}
/* sending status message in response to unknown message */
static int gsm48_cc_tx_status(struct gsm_trans *trans, int cause)
{
struct msgb *nmsg;
struct gsm48_hdr *gh;
uint8_t *cause_ie, *call_state_ie;
LOGP(DCC, LOGL_INFO, "sending STATUS (cause %d)\n", cause);
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_STATUS;
cause_ie = msgb_put(nmsg, 3);
cause_ie[0] = 2;
cause_ie[1] = GSM48_CAUSE_CS_GSM | GSM48_CAUSE_LOC_PRN_S_LU;
cause_ie[2] = 0x80 | cause;
call_state_ie = msgb_put(nmsg, 1);
call_state_ie[0] = 0xc0 | trans->cc.state;
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* reply status enquiry */
static int gsm48_cc_rx_status_enq(struct gsm_trans *trans, struct msgb *msg)
{
LOGP(DCC, LOGL_INFO, "received STATUS ENQUIREY\n");
return gsm48_cc_tx_status(trans, GSM48_CC_CAUSE_RESP_STATUS_INQ);
}
static int gsm48_cc_rx_status(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc_cause cause;
if (payload_len < 1 || payload_len < gh->data[0] + 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of status message "
"error.\n");
return -EINVAL;
}
gsm48_decode_cause(&cause, gh->data);
LOGP(DCC, LOGL_INFO, "received STATUS (cause %d)\n", cause.value);
return 0;
}
/*
* process handlers (mobile originating call establish)
*/
/* on SETUP request from L4, init MM connection */
static int gsm48_cc_init_mm(struct gsm_trans *trans, void *arg)
{
struct msgb *nmsg;
struct gsm_mncc *data = arg;
struct gsm48_mmxx_hdr *nmmh;
/* store setup message */
memcpy(&trans->cc.msg, data, sizeof(struct gsm_mncc));
new_cc_state(trans, GSM_CSTATE_MM_CONNECTION_PEND);
/* establish MM connection */
nmsg = gsm48_mmxx_msgb_alloc(GSM48_MMCC_EST_REQ, trans->callref,
trans->transaction_id, 0);
if (!nmsg)
return -ENOMEM;
nmmh = (struct gsm48_mmxx_hdr *) nmsg->data;
if (data->emergency)
nmmh->emergency = 1;
LOGP(DCC, LOGL_INFO, "Sending MMCC_EST_REQ\n");
return gsm48_mmxx_downmsg(trans->ms, nmsg);
}
/* abort connection prior SETUP */
static int gsm48_cc_abort_mm(struct gsm_trans *trans, void *arg)
{
struct msgb *nmsg;
/* abort MM connection */
nmsg = gsm48_mmxx_msgb_alloc(GSM48_MMCC_REL_REQ, trans->callref,
trans->transaction_id, 0);
if (!nmsg)
return -ENOMEM;
LOGP(DCC, LOGL_INFO, "Sending MMCC_REL_REQ\n");
gsm48_mmxx_downmsg(trans->ms, nmsg);
new_cc_state(trans, GSM_CSTATE_NULL);
trans->callref = 0;
trans_free(trans);
return 0;
}
/* setup message from upper layer */
static int gsm48_cc_tx_setup(struct gsm_trans *trans)
{
struct msgb *nmsg;
struct gsm48_hdr *gh;
struct gsm_mncc *setup = &trans->cc.msg;
int rc, transaction_id;
uint8_t *ie;
LOGP(DCC, LOGL_INFO, "sending SETUP\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
/* transaction id must not be assigned */
if (trans->transaction_id != 0xff) { /* unasssigned */
LOGP(DCC, LOGL_NOTICE, "TX Setup with assigned transaction. "
"This is not allowed!\n");
/* Temporarily out of order */
rc = mncc_release_ind(trans->ms, trans, trans->callref,
GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_NORMAL_UNSPEC);
trans->callref = 0;
trans_free(trans);
return rc;
}
/* Get free transaction_id */
transaction_id = trans_assign_trans_id(trans->ms, GSM48_PDISC_CC, 0);
if (transaction_id < 0) {
/* no free transaction ID */
rc = mncc_release_ind(trans->ms, trans, trans->callref,
GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
trans->callref = 0;
trans_free(trans);
return rc;
}
trans->transaction_id = transaction_id;
gh->msg_type = (setup->emergency) ? GSM48_MT_CC_EMERG_SETUP :
GSM48_MT_CC_SETUP;
/* actually we have to start it when CM SERVICE REQUEST has been sent,
* but there is no primitive for that defined. i think it is ok to
* do it here rather than inventing MMCC-NOTIFY-IND.
*/
gsm48_start_cc_timer(trans, 0x303, GSM48_T303_MS);
/* bearer capability (optional for emergency calls only) */
if (setup->fields & MNCC_F_BEARER_CAP)
gsm48_encode_bearer_cap(nmsg, 0, &setup->bearer_cap);
if (!setup->emergency) {
/* facility */
if (setup->fields & MNCC_F_FACILITY)
gsm48_encode_facility(nmsg, 0, &setup->facility);
/* called party BCD number */
if (setup->fields & MNCC_F_CALLED)
gsm48_encode_called(nmsg, &setup->called);
/* user-user */
if (setup->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(nmsg, 0, &setup->useruser);
/* ss version */
if (setup->fields & MNCC_F_SSVERSION)
gsm48_encode_ssversion(nmsg, &setup->ssversion);
/* CLIR suppression */
if (setup->clir.sup) {
ie = msgb_put(nmsg, 1);
ie[0] = GSM48_IE_CLIR_SUPP;
}
/* CLIR invocation */
if (setup->clir.inv) {
ie = msgb_put(nmsg, 1);
ie[0] = GSM48_IE_CLIR_INVOC;
}
/* cc cap */
if (setup->fields & MNCC_F_CCCAP)
gsm48_encode_cccap(nmsg, &setup->cccap);
}
/* actually MM CONNECTION PENDING */
new_cc_state(trans, GSM_CSTATE_INITIATED);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* progress is received from lower layer */
static int gsm48_cc_rx_progress(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc progress;
LOGP(DCC, LOGL_INFO, "received PROGRESS\n");
memset(&progress, 0, sizeof(struct gsm_mncc));
progress.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len,
GSM48_IE_PROGR_IND, 0);
/* progress */
if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) {
progress.fields |= MNCC_F_PROGRESS;
gsm48_decode_progress(&progress.progress,
TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1);
/* store last progress indicator */
trans->cc.prog_ind = progress.progress.descr;
}
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
progress.fields |= MNCC_F_USERUSER;
gsm48_decode_useruser(&progress.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
}
return mncc_recvmsg(trans->ms, trans, MNCC_PROGRESS_IND, &progress);
}
/* call proceeding is received from lower layer */
static int gsm48_cc_rx_call_proceeding(struct gsm_trans *trans,
struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc call_proc;
LOGP(DCC, LOGL_INFO, "sending CALL PROCEEDING\n");
gsm48_stop_cc_timer(trans);
memset(&call_proc, 0, sizeof(struct gsm_mncc));
call_proc.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
#if 0
/* repeat */
if (TLVP_PRESENT(&tp, GSM48_IE_REPEAT_CIR))
call_conf.repeat = 1;
if (TLVP_PRESENT(&tp, GSM48_IE_REPEAT_SEQ))
call_conf.repeat = 2;
#endif
/* bearer capability */
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
call_proc.fields |= MNCC_F_BEARER_CAP;
gsm48_decode_bearer_cap(&call_proc.bearer_cap,
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
}
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
call_proc.fields |= MNCC_F_FACILITY;
gsm48_decode_facility(&call_proc.facility,
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
}
/* progress */
if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) {
call_proc.fields |= MNCC_F_PROGRESS;
gsm48_decode_progress(&call_proc.progress,
TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1);
/* store last progress indicator */
trans->cc.prog_ind = call_proc.progress.descr;
}
/* start T310, if last progress indicator was 1 or 2 or 64 */
if (trans->cc.prog_ind == 1
|| trans->cc.prog_ind == 2
|| trans->cc.prog_ind == 64)
gsm48_start_cc_timer(trans, 0x310, GSM48_T310_MS);
new_cc_state(trans, GSM_CSTATE_MO_CALL_PROC);
return mncc_recvmsg(trans->ms, trans, MNCC_CALL_PROC_IND,
&call_proc);
}
/* alerting is received by the lower layer */
static int gsm48_cc_rx_alerting(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc alerting;
LOGP(DCC, LOGL_INFO, "received ALERTING\n");
gsm48_stop_cc_timer(trans);
/* no T301 in MS call control */
memset(&alerting, 0, sizeof(struct gsm_mncc));
alerting.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
alerting.fields |= MNCC_F_FACILITY;
gsm48_decode_facility(&alerting.facility,
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
}
/* progress */
if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) {
alerting.fields |= MNCC_F_PROGRESS;
gsm48_decode_progress(&alerting.progress,
TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1);
}
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
alerting.fields |= MNCC_F_USERUSER;
gsm48_decode_useruser(&alerting.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
}
new_cc_state(trans, GSM_CSTATE_CALL_DELIVERED);
return mncc_recvmsg(trans->ms, trans, MNCC_ALERT_IND,
&alerting);
}
/* connect is received from lower layer */
static int gsm48_cc_rx_connect(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc connect;
LOGP(DCC, LOGL_INFO, "received CONNECT\n");
gsm48_stop_cc_timer(trans);
memset(&connect, 0, sizeof(struct gsm_mncc));
connect.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
connect.fields |= MNCC_F_FACILITY;
gsm48_decode_facility(&connect.facility,
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
}
/* connected */
if (TLVP_PRESENT(&tp, GSM48_IE_CONN_BCD)) {
connect.fields |= MNCC_F_CONNECTED;
gsm48_decode_connected(&connect.connected,
TLVP_VAL(&tp, GSM48_IE_CONN_BCD)-1);
}
/* progress */
if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) {
connect.fields |= MNCC_F_PROGRESS;
gsm48_decode_progress(&connect.progress,
TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1);
}
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
connect.fields |= MNCC_F_USERUSER;
gsm48_decode_useruser(&connect.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
}
/* ACTIVE state is set during this: */
gsm48_cc_tx_connect_ack(trans, NULL);
return mncc_recvmsg(trans->ms, trans, MNCC_SETUP_CNF, &connect);
}
/* connect ack message from upper layer */
static int gsm48_cc_tx_connect_ack(struct gsm_trans *trans, void *arg)
{
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending CONNECT ACKNOWLEDGE\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_CONNECT_ACK;
new_cc_state(trans, GSM_CSTATE_ACTIVE);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/*
* process handlers (mobile terminating call establish)
*/
/* setup is received from lower layer */
static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc setup;
LOGP(DCC, LOGL_INFO, "received SETUP\n");
memset(&setup, 0, sizeof(struct gsm_mncc));
setup.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
/* bearer capability */
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
setup.fields |= MNCC_F_BEARER_CAP;
gsm48_decode_bearer_cap(&setup.bearer_cap,
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
}
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
setup.fields |= MNCC_F_FACILITY;
gsm48_decode_facility(&setup.facility,
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
}
/* progress */
if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) {
setup.fields |= MNCC_F_PROGRESS;
gsm48_decode_progress(&setup.progress,
TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1);
}
/* signal */
if (TLVP_PRESENT(&tp, GSM48_IE_SIGNAL)) {
setup.fields |= MNCC_F_SIGNAL;
gsm48_decode_signal(&setup.signal,
TLVP_VAL(&tp, GSM48_IE_SIGNAL)-1);
}
/* calling party bcd number */
if (TLVP_PRESENT(&tp, GSM48_IE_CALLING_BCD)) {
setup.fields |= MNCC_F_CALLING;
gsm48_decode_calling(&setup.calling,
TLVP_VAL(&tp, GSM48_IE_CALLING_BCD)-1);
}
/* called party bcd number */
if (TLVP_PRESENT(&tp, GSM48_IE_CALLED_BCD)) {
setup.fields |= MNCC_F_CALLED;
gsm48_decode_called(&setup.called,
TLVP_VAL(&tp, GSM48_IE_CALLED_BCD)-1);
}
/* redirecting party bcd number */
if (TLVP_PRESENT(&tp, GSM48_IE_REDIR_BCD)) {
setup.fields |= MNCC_F_REDIRECTING;
gsm48_decode_redirecting(&setup.redirecting,
TLVP_VAL(&tp, GSM48_IE_REDIR_BCD)-1);
}
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
setup.fields |= MNCC_F_USERUSER;
gsm48_decode_useruser(&setup.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
}
new_cc_state(trans, GSM_CSTATE_CALL_PRESENT);
/* indicate setup to MNCC */
mncc_recvmsg(trans->ms, trans, MNCC_SETUP_IND, &setup);
return 0;
}
/* call conf message from upper layer */
static int gsm48_cc_tx_call_conf(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *confirm = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending CALL CONFIRMED (proceeding)\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_CALL_CONF;
new_cc_state(trans, GSM_CSTATE_MO_TERM_CALL_CONF);
/* bearer capability */
if (confirm->fields & MNCC_F_BEARER_CAP)
gsm48_encode_bearer_cap(nmsg, 0, &confirm->bearer_cap);
/* cause */
if (confirm->fields & MNCC_F_CAUSE)
gsm48_encode_cause(nmsg, 0, &confirm->cause);
/* cc cap */
if (confirm->fields & MNCC_F_CCCAP)
gsm48_encode_cccap(nmsg, &confirm->cccap);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* alerting message from upper layer */
static int gsm48_cc_tx_alerting(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *alerting = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending ALERTING\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_ALERTING;
/* facility */
if (alerting->fields & MNCC_F_FACILITY)
gsm48_encode_facility(nmsg, 0, &alerting->facility);
/* user-user */
if (alerting->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(nmsg, 0, &alerting->useruser);
/* ss version */
if (alerting->fields & MNCC_F_SSVERSION)
gsm48_encode_ssversion(nmsg, &alerting->ssversion);
new_cc_state(trans, GSM_CSTATE_CALL_RECEIVED);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* connect message from upper layer */
static int gsm48_cc_tx_connect(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *connect = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending CONNECT\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_CONNECT;
gsm48_stop_cc_timer(trans);
gsm48_start_cc_timer(trans, 0x313, GSM48_T313_MS);
/* facility */
if (connect->fields & MNCC_F_FACILITY)
gsm48_encode_facility(nmsg, 0, &connect->facility);
/* user-user */
if (connect->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(nmsg, 0, &connect->useruser);
/* ss version */
if (connect->fields & MNCC_F_SSVERSION)
gsm48_encode_ssversion(nmsg, &connect->ssversion);
new_cc_state(trans, GSM_CSTATE_CONNECT_REQUEST);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* connect ack is received from lower layer */
static int gsm48_cc_rx_connect_ack(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm_mncc connect_ack;
LOGP(DCC, LOGL_INFO, "received CONNECT ACKNOWLEDGE\n");
gsm48_stop_cc_timer(trans);
new_cc_state(trans, GSM_CSTATE_ACTIVE);
memset(&connect_ack, 0, sizeof(struct gsm_mncc));
connect_ack.callref = trans->callref;
return mncc_recvmsg(trans->ms, trans, MNCC_SETUP_COMPL_IND,
&connect_ack);
}
/*
* process handlers (during active state)
*/
/* notify message from upper layer */
static int gsm48_cc_tx_notify(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *notify = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending NOTIFY\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_NOTIFY;
/* notify */
gsm48_encode_notify(nmsg, notify->notify);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* notify is received from lower layer */
static int gsm48_cc_rx_notify(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc notify;
LOGP(DCC, LOGL_INFO, "received NOTIFY\n");
memset(&notify, 0, sizeof(struct gsm_mncc));
notify.callref = trans->callref;
/* notify */
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of notify message error.\n");
return -EINVAL;
}
gsm48_decode_notify(&notify.notify, gh->data);
return mncc_recvmsg(trans->ms, trans, MNCC_NOTIFY_IND, &notify);
}
/* start dtmf message from upper layer */
static int gsm48_cc_tx_start_dtmf(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *dtmf = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending START DTMF\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_START_DTMF;
/* keypad */
gsm48_encode_keypad(nmsg, dtmf->keypad);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* start dtmf ack is received from lower layer */
static int gsm48_cc_rx_start_dtmf_ack(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc dtmf;
LOGP(DCC, LOGL_INFO, "received START DTMF ACKNOWLEDGE\n");
memset(&dtmf, 0, sizeof(struct gsm_mncc));
dtmf.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
/* keypad facility */
if (TLVP_PRESENT(&tp, GSM48_IE_KPD_FACILITY)) {
dtmf.fields |= MNCC_F_KEYPAD;
gsm48_decode_keypad(&dtmf.keypad,
TLVP_VAL(&tp, GSM48_IE_KPD_FACILITY)-1);
}
return mncc_recvmsg(trans->ms, trans, MNCC_START_DTMF_RSP, &dtmf);
}
/* start dtmf rej is received from lower layer */
static int gsm48_cc_rx_start_dtmf_rej(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc dtmf;
LOGP(DCC, LOGL_INFO, "received START DTMF REJECT\n");
memset(&dtmf, 0, sizeof(struct gsm_mncc));
dtmf.callref = trans->callref;
/* cause */
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of dtmf reject message "
"error.\n");
return -EINVAL;
}
gsm48_decode_cause(&dtmf.cause, gh->data);
return mncc_recvmsg(trans->ms, trans, MNCC_START_DTMF_REJ, &dtmf);
}
/* stop dtmf message from upper layer */
static int gsm48_cc_tx_stop_dtmf(struct gsm_trans *trans, void *arg)
{
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending STOP DTMF\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_STOP_DTMF;
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* stop dtmf ack is received from lower layer */
static int gsm48_cc_rx_stop_dtmf_ack(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc dtmf;
LOGP(DCC, LOGL_INFO, "received STOP DTMF ACKNOWLEDGE\n");
memset(&dtmf, 0, sizeof(struct gsm_mncc));
dtmf.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
return mncc_recvmsg(trans->ms, trans, MNCC_STOP_DTMF_RSP, &dtmf);
}
/* hold message from upper layer */
static int gsm48_cc_tx_hold(struct gsm_trans *trans, void *arg)
{
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending HOLD\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_HOLD;
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* hold ack is received from lower layer */
static int gsm48_cc_rx_hold_ack(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm_mncc hold;
LOGP(DCC, LOGL_INFO, "received HOLD ACKNOWLEDGE\n");
memset(&hold, 0, sizeof(struct gsm_mncc));
hold.callref = trans->callref;
return mncc_recvmsg(trans->ms, trans, MNCC_HOLD_CNF, &hold);
}
/* hold rej is received from lower layer */
static int gsm48_cc_rx_hold_rej(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc hold;
LOGP(DCC, LOGL_INFO, "received HOLD REJECT\n");
memset(&hold, 0, sizeof(struct gsm_mncc));
hold.callref = trans->callref;
/* cause */
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of hold reject message "
"error.\n");
return -EINVAL;
}
gsm48_decode_cause(&hold.cause, gh->data);
return mncc_recvmsg(trans->ms, trans, MNCC_HOLD_REJ, &hold);
}
/* retrieve message from upper layer */
static int gsm48_cc_tx_retrieve(struct gsm_trans *trans, void *arg)
{
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending RETRIEVE\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_RETR;
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* retrieve ack is received from lower layer */
static int gsm48_cc_rx_retrieve_ack(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm_mncc retrieve;
LOGP(DCC, LOGL_INFO, "received RETRIEVE ACKNOWLEDGE\n");
memset(&retrieve, 0, sizeof(struct gsm_mncc));
retrieve.callref = trans->callref;
return mncc_recvmsg(trans->ms, trans, MNCC_RETRIEVE_CNF, &retrieve);
}
/* retrieve rej is received from lower layer */
static int gsm48_cc_rx_retrieve_rej(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc retrieve;
LOGP(DCC, LOGL_INFO, "received RETRIEVE REJECT\n");
memset(&retrieve, 0, sizeof(struct gsm_mncc));
retrieve.callref = trans->callref;
/* cause */
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of retrieve reject message "
"error.\n");
return -EINVAL;
}
gsm48_decode_cause(&retrieve.cause, gh->data);
return mncc_recvmsg(trans->ms, trans, MNCC_RETRIEVE_REJ, &retrieve);
}
/* facility message from upper layer or from timer event */
static int gsm48_cc_tx_facility(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *fac = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending FACILITY\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_FACILITY;
/* facility */
gsm48_encode_facility(nmsg, 1, &fac->facility);
/* ss version */
if (fac->fields & MNCC_F_SSVERSION)
gsm48_encode_ssversion(nmsg, &fac->ssversion);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* facility is received from lower layer */
static int gsm48_cc_rx_facility(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc fac;
LOGP(DCC, LOGL_INFO, "received FACILITY\n");
memset(&fac, 0, sizeof(struct gsm_mncc));
fac.callref = trans->callref;
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of facility message "
"error.\n");
return -EINVAL;
}
/* facility */
gsm48_decode_facility(&fac.facility, gh->data);
return mncc_recvmsg(trans->ms, trans, MNCC_FACILITY_IND, &fac);
}
/* user info message from upper layer or from timer event */
static int gsm48_cc_tx_userinfo(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *user = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending USERINFO\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_USER_INFO;
/* user-user */
if (user->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(nmsg, 1, &user->useruser);
/* more data */
if (user->more)
gsm48_encode_more(nmsg);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* user info is received from lower layer */
static int gsm48_cc_rx_userinfo(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc user;
LOGP(DCC, LOGL_INFO, "received USERINFO\n");
memset(&user, 0, sizeof(struct gsm_mncc));
user.callref = trans->callref;
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of userinfo message "
"error.\n");
return -EINVAL;
}
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len,
GSM48_IE_USER_USER, 0);
/* user-user */
gsm48_decode_useruser(&user.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
/* more data */
if (TLVP_PRESENT(&tp, GSM48_IE_MORE_DATA))
user.more = 1;
return mncc_recvmsg(trans->ms, trans, MNCC_USERINFO_IND, &user);
}
/* modify message from upper layer or from timer event */
static int gsm48_cc_tx_modify(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *modify = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending MODIFY\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_MODIFY;
gsm48_start_cc_timer(trans, 0x323, GSM48_T323_MS);
/* bearer capability */
gsm48_encode_bearer_cap(nmsg, 1, &modify->bearer_cap);
new_cc_state(trans, GSM_CSTATE_MO_TERM_MODIFY);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* modify complete is received from lower layer */
static int gsm48_cc_rx_modify_complete(struct gsm_trans *trans,
struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc modify;
LOGP(DCC, LOGL_INFO, "received MODIFY COMPLETE\n");
gsm48_stop_cc_timer(trans);
memset(&modify, 0, sizeof(struct gsm_mncc));
modify.callref = trans->callref;
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of modify complete message "
"error.\n");
return -EINVAL;
}
/* bearer capability */
gsm48_decode_bearer_cap(&modify.bearer_cap, gh->data);
new_cc_state(trans, GSM_CSTATE_ACTIVE);
return mncc_recvmsg(trans->ms, trans, MNCC_MODIFY_CNF, &modify);
}
/* modify reject is received from lower layer */
static int gsm48_cc_rx_modify_reject(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc modify;
LOGP(DCC, LOGL_INFO, "received MODIFY REJECT\n");
gsm48_stop_cc_timer(trans);
memset(&modify, 0, sizeof(struct gsm_mncc));
modify.callref = trans->callref;
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of modify reject message "
"error.\n");
return -EINVAL;
}
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len,
GSM48_IE_BEARER_CAP, GSM48_IE_CAUSE);
/* bearer capability */
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
modify.fields |= MNCC_F_BEARER_CAP;
gsm48_decode_bearer_cap(&modify.bearer_cap,
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
}
/* cause */
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
modify.fields |= MNCC_F_CAUSE;
gsm48_decode_cause(&modify.cause,
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
}
new_cc_state(trans, GSM_CSTATE_ACTIVE);
return mncc_recvmsg(trans->ms, trans, MNCC_MODIFY_REJ, &modify);
}
/* modify is received from lower layer */
static int gsm48_cc_rx_modify(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct gsm_mncc modify;
LOGP(DCC, LOGL_INFO, "received MODIFY\n");
memset(&modify, 0, sizeof(struct gsm_mncc));
modify.callref = trans->callref;
if (payload_len < 1) {
LOGP(DCC, LOGL_NOTICE, "Short read of modify message error.\n");
return -EINVAL;
}
/* bearer capability */
gsm48_decode_bearer_cap(&modify.bearer_cap, gh->data);
new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY);
return mncc_recvmsg(trans->ms, trans, MNCC_MODIFY_IND, &modify);
}
/* modify complete message from upper layer or from timer event */
static int gsm48_cc_tx_modify_complete(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *modify = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending MODIFY COMPLETE\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_MODIFY_COMPL;
/* bearer capability */
gsm48_encode_bearer_cap(nmsg, 1, &modify->bearer_cap);
new_cc_state(trans, GSM_CSTATE_ACTIVE);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* modify reject message from upper layer or from timer event */
static int gsm48_cc_tx_modify_reject(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *modify = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending MODIFY REJECT\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_MODIFY_REJECT;
/* bearer capability */
gsm48_encode_bearer_cap(nmsg, 1, &modify->bearer_cap);
/* cause */
gsm48_encode_cause(nmsg, 1, &modify->cause);
new_cc_state(trans, GSM_CSTATE_ACTIVE);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/*
* process handlers (call clearing)
*/
static struct gsm_mncc_cause default_cause = {
.location = GSM48_CAUSE_LOC_PRN_S_LU,
.coding = 0,
.rec = 0,
.rec_val = 0,
.value = GSM48_CC_CAUSE_NORMAL_UNSPEC,
.diag_len = 0,
.diag = { 0 },
};
/* disconnect message from upper layer or from timer event */
static int gsm48_cc_tx_disconnect(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *disc = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending DISCONNECT\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_DISCONNECT;
gsm48_stop_cc_timer(trans);
gsm48_start_cc_timer(trans, 0x305, GSM48_T305_MS);
/* cause */
if (disc->fields & MNCC_F_CAUSE)
gsm48_encode_cause(nmsg, 1, &disc->cause);
else
gsm48_encode_cause(nmsg, 1, &default_cause);
/* facility */
if (disc->fields & MNCC_F_FACILITY)
gsm48_encode_facility(nmsg, 0, &disc->facility);
/* progress */
if (disc->fields & MNCC_F_PROGRESS)
gsm48_encode_progress(nmsg, 0, &disc->progress);
/* user-user */
if (disc->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(nmsg, 0, &disc->useruser);
/* ss version */
if (disc->fields & MNCC_F_SSVERSION)
gsm48_encode_ssversion(nmsg, &disc->ssversion);
new_cc_state(trans, GSM_CSTATE_DISCONNECT_REQ);
return gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
}
/* release message from upper layer or from timer event */
static int gsm48_cc_tx_release(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *rel = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending RELEASE\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_RELEASE;
gsm48_stop_cc_timer(trans);
gsm48_start_cc_timer(trans, 0x308, GSM48_T308_MS);
/* cause */
if (rel->fields & MNCC_F_CAUSE)
gsm48_encode_cause(nmsg, 0, &rel->cause);
/* facility */
if (rel->fields & MNCC_F_FACILITY)
gsm48_encode_facility(nmsg, 0, &rel->facility);
/* user-user */
if (rel->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(nmsg, 0, &rel->useruser);
/* ss version */
if (rel->fields & MNCC_F_SSVERSION)
gsm48_encode_ssversion(nmsg, &rel->ssversion);
trans->cc.T308_second = 0;
memcpy(&trans->cc.msg, rel, sizeof(struct gsm_mncc));
if (trans->cc.state != GSM_CSTATE_RELEASE_REQ)
new_cc_state(trans, GSM_CSTATE_RELEASE_REQ);
gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
#if 0
/* release without sending MMCC_REL_REQ */
new_cc_state(trans, GSM_CSTATE_NULL);
trans->callref = 0;
trans_free(trans);
#endif
return 0;
}
/* reject message from upper layer */
static int gsm48_cc_tx_release_compl(struct gsm_trans *trans, void *arg)
{
struct gsm_mncc *rel = arg;
struct msgb *nmsg;
struct gsm48_hdr *gh;
LOGP(DCC, LOGL_INFO, "sending RELEASE COMPLETE\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_RELEASE_COMPL;
gsm48_stop_cc_timer(trans);
/* cause */
if (rel->fields & MNCC_F_CAUSE)
gsm48_encode_cause(nmsg, 0, &rel->cause);
/* facility */
if (rel->fields & MNCC_F_FACILITY)
gsm48_encode_facility(nmsg, 0, &rel->facility);
/* user-user */
if (rel->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(nmsg, 0, &rel->useruser);
/* ss version */
if (rel->fields & MNCC_F_SSVERSION)
gsm48_encode_ssversion(nmsg, &rel->ssversion);
/* release without sending MMCC_REL_REQ */
new_cc_state(trans, GSM_CSTATE_NULL);
trans->callref = 0;
trans_free(trans);
return 0;
}
/* disconnect is received from lower layer */
static int gsm48_cc_rx_disconnect(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc disc;
LOGP(DCC, LOGL_INFO, "received DISCONNECT\n");
gsm48_stop_cc_timer(trans);
new_cc_state(trans, GSM_CSTATE_DISCONNECT_IND);
memset(&disc, 0, sizeof(struct gsm_mncc));
disc.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len,
GSM48_IE_CAUSE, 0);
/* cause */
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
disc.fields |= MNCC_F_CAUSE;
gsm48_decode_cause(&disc.cause,
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
}
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
disc.fields |= MNCC_F_FACILITY;
gsm48_decode_facility(&disc.facility,
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
}
/* progress */
if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) {
disc.fields |= MNCC_F_PROGRESS;
gsm48_decode_progress(&disc.progress,
TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1);
}
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
disc.fields |= MNCC_F_USERUSER;
gsm48_decode_useruser(&disc.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
}
/* store disconnect cause for T305 expiry */
memcpy(&trans->cc.msg, &disc, sizeof(struct gsm_mncc));
return mncc_recvmsg(trans->ms, trans, MNCC_DISC_IND, &disc);
}
/* release is received from lower layer */
static int gsm48_cc_rx_release(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc rel;
LOGP(DCC, LOGL_INFO, "received RELEASE\n");
gsm48_stop_cc_timer(trans);
memset(&rel, 0, sizeof(struct gsm_mncc));
rel.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
/* cause */
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
rel.fields |= MNCC_F_CAUSE;
gsm48_decode_cause(&rel.cause,
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
}
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
rel.fields |= MNCC_F_FACILITY;
gsm48_decode_facility(&rel.facility,
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
}
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
rel.fields |= MNCC_F_USERUSER;
gsm48_decode_useruser(&rel.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
}
/* in case we receive a release, when we are already in NULL state */
if (trans->cc.state == GSM_CSTATE_NULL) {
LOGP(DCC, LOGL_INFO, "ignoring RELEASE in NULL state\n");
/* release MM conn, free trans */
return gsm48_rel_null_free(trans);
}
if (trans->cc.state == GSM_CSTATE_RELEASE_REQ) {
/* release collision 5.4.5 */
mncc_recvmsg(trans->ms, trans, MNCC_REL_CNF, &rel);
} else {
struct msgb *nmsg;
/* forward cause only */
LOGP(DCC, LOGL_INFO, "sending RELEASE COMPLETE\n");
nmsg = gsm48_l3_msgb_alloc();
if (!nmsg)
return -ENOMEM;
gh = (struct gsm48_hdr *) msgb_put(nmsg, sizeof(*gh));
gh->msg_type = GSM48_MT_CC_RELEASE_COMPL;
if (rel.fields & MNCC_F_CAUSE)
gsm48_encode_cause(nmsg, 0, &rel.cause);
gsm48_cc_to_mm(nmsg, trans, GSM48_MMCC_DATA_REQ);
/* release indication */
mncc_recvmsg(trans->ms, trans, MNCC_REL_IND, &rel);
}
/* release MM conn, got NULL state, free trans */
return gsm48_rel_null_free(trans);
}
/* release complete is received from lower layer */
static int gsm48_cc_rx_release_compl(struct gsm_trans *trans, struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
struct tlv_parsed tp;
struct gsm_mncc rel;
LOGP(DCC, LOGL_INFO, "received RELEASE COMPLETE\n");
gsm48_stop_cc_timer(trans);
memset(&rel, 0, sizeof(struct gsm_mncc));
rel.callref = trans->callref;
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
/* cause */
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
rel.fields |= MNCC_F_CAUSE;
gsm48_decode_cause(&rel.cause,
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
}
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
rel.fields |= MNCC_F_FACILITY;
gsm48_decode_facility(&rel.facility,
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
}
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
rel.fields |= MNCC_F_USERUSER;
gsm48_decode_useruser(&rel.useruser,
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
}
if (trans->callref) {
switch (trans->cc.state) {
case GSM_CSTATE_CALL_PRESENT:
mncc_recvmsg(trans->ms, trans,
MNCC_REJ_IND, &rel);
break;
case GSM_CSTATE_RELEASE_REQ:
mncc_recvmsg(trans->ms, trans,
MNCC_REL_CNF, &rel);
break;
default:
mncc_recvmsg(trans->ms, trans,
MNCC_REL_IND, &rel);
}
}
/* release MM conn, got NULL state, free trans */
return gsm48_rel_null_free(trans);
}
/*
* state machines
*/
/* state trasitions for MNCC messages (upper layer) */
static struct downstate {
uint32_t states;
int type;
int (*rout) (struct gsm_trans *trans, void *arg);
} downstatelist[] = {
/* mobile originating call establishment */
{SBIT(GSM_CSTATE_NULL), /* 5.2.1 */
MNCC_SETUP_REQ, gsm48_cc_init_mm},
{SBIT(GSM_CSTATE_MM_CONNECTION_PEND), /* 5.2.1 */
MNCC_REL_REQ, gsm48_cc_abort_mm},
/* mobile terminating call establishment */
{SBIT(GSM_CSTATE_CALL_PRESENT), /* 5.2.2.3.1 */
MNCC_CALL_CONF_REQ, gsm48_cc_tx_call_conf},
{SBIT(GSM_CSTATE_MO_TERM_CALL_CONF), /* 5.2.2.3.2 */
MNCC_ALERT_REQ, gsm48_cc_tx_alerting},
{SBIT(GSM_CSTATE_MO_TERM_CALL_CONF) |
SBIT(GSM_CSTATE_CALL_RECEIVED), /* 5.2.2.5 */
MNCC_SETUP_RSP, gsm48_cc_tx_connect},
/* signalling during call */
{SBIT(GSM_CSTATE_ACTIVE), /* 5.3.1 */
MNCC_NOTIFY_REQ, gsm48_cc_tx_notify},
{ALL_STATES, /* 5.5.7.1 */
MNCC_START_DTMF_REQ, gsm48_cc_tx_start_dtmf},
{ALL_STATES, /* 5.5.7.3 */
MNCC_STOP_DTMF_REQ, gsm48_cc_tx_stop_dtmf},
{SBIT(GSM_CSTATE_ACTIVE),
MNCC_HOLD_REQ, gsm48_cc_tx_hold},
{SBIT(GSM_CSTATE_ACTIVE),
MNCC_RETRIEVE_REQ, gsm48_cc_tx_retrieve},
{ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ),
MNCC_FACILITY_REQ, gsm48_cc_tx_facility},
{SBIT(GSM_CSTATE_ACTIVE),
MNCC_USERINFO_REQ, gsm48_cc_tx_userinfo},
/* clearing */
{ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_DISCONNECT_IND) -
SBIT(GSM_CSTATE_RELEASE_REQ) -
SBIT(GSM_CSTATE_DISCONNECT_REQ), /* 5.4.3.1 */
MNCC_DISC_REQ, gsm48_cc_tx_disconnect},
{SBIT(GSM_CSTATE_INITIATED),
MNCC_REJ_REQ, gsm48_cc_tx_release_compl},
{ALL_STATES - SBIT(GSM_CSTATE_NULL) -
SBIT(GSM_CSTATE_RELEASE_REQ), /* ??? */
MNCC_REL_REQ, gsm48_cc_tx_release},
/* modify */
{SBIT(GSM_CSTATE_ACTIVE),
MNCC_MODIFY_REQ, gsm48_cc_tx_modify},
{SBIT(GSM_CSTATE_MO_ORIG_MODIFY),
MNCC_MODIFY_RSP, gsm48_cc_tx_modify_complete},
{SBIT(GSM_CSTATE_MO_ORIG_MODIFY),
MNCC_MODIFY_REJ, gsm48_cc_tx_modify_reject},
};
#define DOWNSLLEN \
(sizeof(downstatelist) / sizeof(struct downstate))
int mncc_tx_to_cc(void *inst, int msg_type, void *arg)
{
struct osmocom_ms *ms = (struct osmocom_ms *) inst;
struct gsm_mncc *data = arg;
struct gsm_trans *trans;
int i, rc;
if (!ms->started || ms->shutdown != MS_SHUTDOWN_NONE) {
LOGP(DCC, LOGL_NOTICE, "Phone is down!\n");
if (ms->mncc_entity.mncc_recv && msg_type != MNCC_REL_REQ) {
struct gsm_mncc rel;
memset(&rel, 0, sizeof(rel));
rel.callref = data->callref;
mncc_set_cause(&rel, GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_DEST_OOO);
ms->mncc_entity.mncc_recv(ms, MNCC_REL_IND, &rel);
}
return -EBUSY;
}
data->msg_type = msg_type;
/* Find callref */
trans = trans_find_by_callref(ms, data->callref);
if (!trans) {
/* check for SETUP message */
if (msg_type != MNCC_SETUP_REQ) {
/* Invalid call reference */
LOGP(DCC, LOGL_NOTICE, "transaction not found\n");
return mncc_release_ind(ms, NULL, data->callref,
GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_INVAL_TRANS_ID);
}
if (data->callref >= 0x40000000) {
LOGP(DCC, LOGL_FATAL, "MNCC ref wrong.\n");
return mncc_release_ind(ms, NULL, data->callref,
GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_INVAL_TRANS_ID);
}
/* Create transaction */
trans = trans_alloc(ms, GSM48_PDISC_CC, 0xff, data->callref);
if (!trans) {
/* No memory or whatever */
return mncc_release_ind(ms, NULL, data->callref,
GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
}
}
switch (msg_type) {
case GSM_TCHF_FRAME:
return gsm_send_voice(ms, arg);
case MNCC_LCHAN_MODIFY:
return 0;
case MNCC_FRAME_RECV:
ms->mncc_entity.ref = trans->callref;
gsm48_rr_audio_mode(ms,
AUDIO_TX_TRAFFIC_REQ | AUDIO_RX_TRAFFIC_IND);
return 0;
case MNCC_FRAME_DROP:
if (ms->mncc_entity.ref == trans->callref)
ms->mncc_entity.ref = 0;
gsm48_rr_audio_mode(ms, AUDIO_TX_MICROPHONE | AUDIO_RX_SPEAKER);
return 0;
}
/* Find function for current state and message */
for (i = 0; i < DOWNSLLEN; i++)
if ((msg_type == downstatelist[i].type)
&& ((1 << trans->cc.state) & downstatelist[i].states))
break;
if (i == DOWNSLLEN) {
LOGP(DCC, LOGL_NOTICE, "Message %d unhandled at state %d\n",
msg_type, trans->cc.state);
return 0;
}
rc = downstatelist[i].rout(trans, arg);
return rc;
}
/* state trasitions for call control messages (lower layer) */
static struct datastate {
uint32_t states;
int type;
int (*rout) (struct gsm_trans *trans, struct msgb *msg);
} datastatelist[] = {
/* mobile originating call establishment */
{SBIT(GSM_CSTATE_INITIATED), /* 5.2.1.3 */
GSM48_MT_CC_CALL_PROC, gsm48_cc_rx_call_proceeding},
{SBIT(GSM_CSTATE_INITIATED) | SBIT(GSM_CSTATE_MO_CALL_PROC) |
SBIT(GSM_CSTATE_CALL_DELIVERED), /* 5.2.1.4.1 */
GSM48_MT_CC_PROGRESS, gsm48_cc_rx_progress},
{SBIT(GSM_CSTATE_INITIATED) |
SBIT(GSM_CSTATE_MO_CALL_PROC), /* 5.2.1.5 */
GSM48_MT_CC_ALERTING, gsm48_cc_rx_alerting},
{SBIT(GSM_CSTATE_INITIATED) | SBIT(GSM_CSTATE_MO_CALL_PROC) |
SBIT(GSM_CSTATE_CALL_DELIVERED), /* 5.2.1.6 */
GSM48_MT_CC_CONNECT, gsm48_cc_rx_connect},
/* mobile terminating call establishment */
{SBIT(GSM_CSTATE_NULL), /* 5.2.2.1 */
GSM48_MT_CC_SETUP, gsm48_cc_rx_setup},
{SBIT(GSM_CSTATE_CONNECT_REQUEST), /* 5.2.2.6 */
GSM48_MT_CC_CONNECT_ACK, gsm48_cc_rx_connect_ack},
/* signalling during call */
{SBIT(GSM_CSTATE_ACTIVE), /* 5.3.1 */
GSM48_MT_CC_NOTIFY, gsm48_cc_rx_notify},
{ALL_STATES, /* 8.4 */
GSM48_MT_CC_STATUS_ENQ, gsm48_cc_rx_status_enq},
{ALL_STATES,
GSM48_MT_CC_STATUS, gsm48_cc_rx_status},
{ALL_STATES, /* 5.5.7.2 */
GSM48_MT_CC_START_DTMF_ACK, gsm48_cc_rx_start_dtmf_ack},
{ALL_STATES, /* 5.5.7.2 */
GSM48_MT_CC_START_DTMF_REJ, gsm48_cc_rx_start_dtmf_rej},
{ALL_STATES, /* 5.5.7.4 */
GSM48_MT_CC_STOP_DTMF_ACK, gsm48_cc_rx_stop_dtmf_ack},
{SBIT(GSM_CSTATE_ACTIVE),
GSM48_MT_CC_HOLD_ACK, gsm48_cc_rx_hold_ack},
{SBIT(GSM_CSTATE_ACTIVE),
GSM48_MT_CC_HOLD_REJ, gsm48_cc_rx_hold_rej},
{SBIT(GSM_CSTATE_ACTIVE),
GSM48_MT_CC_RETR_ACK, gsm48_cc_rx_retrieve_ack},
{SBIT(GSM_CSTATE_ACTIVE),
GSM48_MT_CC_RETR_REJ, gsm48_cc_rx_retrieve_rej},
{ALL_STATES - SBIT(GSM_CSTATE_NULL),
GSM48_MT_CC_FACILITY, gsm48_cc_rx_facility},
{SBIT(GSM_CSTATE_ACTIVE),
GSM48_MT_CC_USER_INFO, gsm48_cc_rx_userinfo},
/* clearing */
{ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ) -
SBIT(GSM_CSTATE_DISCONNECT_IND), /* 5.4.4.1.1 */
GSM48_MT_CC_DISCONNECT, gsm48_cc_rx_disconnect},
{ALL_STATES, /* 5.4.3.3 & 5.4.5!!!*/
GSM48_MT_CC_RELEASE, gsm48_cc_rx_release},
{ALL_STATES, /* 5.4.4.1.3 */
GSM48_MT_CC_RELEASE_COMPL, gsm48_cc_rx_release_compl},
/* modify */
{SBIT(GSM_CSTATE_ACTIVE),
GSM48_MT_CC_MODIFY, gsm48_cc_rx_modify},
{SBIT(GSM_CSTATE_MO_TERM_MODIFY),
GSM48_MT_CC_MODIFY_COMPL, gsm48_cc_rx_modify_complete},
{SBIT(GSM_CSTATE_MO_TERM_MODIFY),
GSM48_MT_CC_MODIFY_REJECT, gsm48_cc_rx_modify_reject},
};
#define DATASLLEN \
(sizeof(datastatelist) / sizeof(struct datastate))
static int gsm48_cc_data_ind(struct gsm_trans *trans, struct msgb *msg)
{
struct osmocom_ms *ms = trans->ms;
struct gsm48_hdr *gh = msgb_l3(msg);
int msg_type = gh->msg_type & 0xbf;
uint8_t transaction_id = ((gh->proto_discr & 0xf0) ^ 0x80) >> 4;
/* flip */
int msg_supported = 0; /* determine, if message is supported at all */
int i, rc;
/* set transaction ID, if not already */
trans->transaction_id = transaction_id;
/* pull the MMCC header */
msgb_pull(msg, sizeof(struct gsm48_mmxx_hdr));
LOGP(DCC, LOGL_INFO, "(ms %s) Received '%s' in CC state %s\n", ms->name,
gsm48_cc_msg_name(msg_type),
gsm48_cc_state_name(trans->cc.state));
/* find function for current state and message */
for (i = 0; i < DATASLLEN; i++) {
if (msg_type == datastatelist[i].type)
msg_supported = 1;
if ((msg_type == datastatelist[i].type)
&& ((1 << trans->cc.state) & datastatelist[i].states))
break;
}
if (i == DATASLLEN) {
if (msg_supported) {
LOGP(DCC, LOGL_NOTICE, "Message unhandled at this "
"state.\n");
return gsm48_cc_tx_status(trans,
GSM48_REJECT_MSG_TYPE_NOT_COMPATIBLE);
} else {
LOGP(DCC, LOGL_NOTICE, "Message not supported.\n");
return gsm48_cc_tx_status(trans,
GSM48_REJECT_MSG_TYPE_NOT_IMPLEMENTED);
}
}
rc = datastatelist[i].rout(trans, msg);
return rc;
}
/* receive message from MM layer */
int gsm48_rcv_cc(struct osmocom_ms *ms, struct msgb *msg)
{
struct gsm48_mmxx_hdr *mmh = (struct gsm48_mmxx_hdr *)msg->data;
int msg_type = mmh->msg_type;
struct gsm_trans *trans;
int rc = 0;
trans = trans_find_by_callref(ms, mmh->ref);
if (!trans) {
trans = trans_alloc(ms, GSM48_PDISC_CC, mmh->transaction_id,
mmh->ref);
if (!trans)
return -ENOMEM;
}
LOGP(DCC, LOGL_INFO, "(ms %s) Received '%s' in CC state %s\n", ms->name,
get_mmxx_name(msg_type),
gsm48_cc_state_name(trans->cc.state));
switch (msg_type) {
case GSM48_MMCC_EST_IND:
/* data included */
rc = gsm48_cc_data_ind(trans, msg);
break;
case GSM48_MMCC_EST_CNF:
/* send setup after confirm */
if (trans->cc.state == GSM_CSTATE_MM_CONNECTION_PEND)
rc = gsm48_cc_tx_setup(trans);
else
LOGP(DCC, LOGL_ERROR, "Oops, MMCC-EST-CONF in state "
"%d?\n", trans->cc.state);
break;
case GSM48_MMCC_ERR_IND: /* no supporting re-establishment */
case GSM48_MMCC_REL_IND:
/* release L4, release transaction */
mncc_release_ind(trans->ms, trans, trans->callref,
GSM48_CAUSE_LOC_PRN_S_LU, mmh->cause);
/* release without sending MMCC_REL_REQ */
new_cc_state(trans, GSM_CSTATE_NULL);
trans->callref = 0;
trans_free(trans);
break;
case GSM48_MMCC_DATA_IND:
rc = gsm48_cc_data_ind(trans, msg);
break;
case GSM48_MMCC_UNIT_DATA_IND:
break;
case GSM48_MMCC_SYNC_IND:
break;
default:
LOGP(DCC, LOGL_NOTICE, "Message unhandled.\n");
rc = -ENOTSUP;
}
return rc;
}
int mncc_clear_trans(void *inst, uint8_t protocol)
{
struct osmocom_ms *ms = (struct osmocom_ms *) inst;
struct gsm_mncc rel;
struct gsm_trans *trans, *trans2;
memset(&rel, 0, sizeof(struct gsm_mncc));
/* safe, in case the release process will destroy transaction node */
llist_for_each_entry_safe(trans, trans2, &ms->trans_list, entry) {
if (trans->protocol == protocol) {
LOGP(DCC, LOGL_NOTICE, "Release CC-transaction.\n");
rel.callref = trans->callref;
mncc_set_cause(&rel, GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_TEMP_FAILURE);
mncc_tx_to_cc(ms, MNCC_REL_REQ, &rel);
}
}
return 0;
}
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