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add minimal MO call state transitions

This commit is contained in:
Harald Welte 2008-12-27 16:32:52 +00:00
parent 7eda3ab3c8
commit 4bc90a160a
1 changed files with 133 additions and 74 deletions
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207
src/gsm_04_08.c
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@ -124,80 +124,6 @@ static int gsm0408_sendmsg(struct msgb *msg)
return rsl_data_request(msg, 0);
}
static int gsm48_cc_tx_status(struct gsm_lchan *lchan)
{
struct msgb *msg = gsm48_msgb_alloc();
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
u_int8_t *cause, *call_state;
msg->lchan = lchan;
gh->proto_discr = GSM48_PDISC_CC;
gh->msg_type = GSM48_MT_CC_STATUS;
cause = msgb_put(msg, 3);
cause[0] = 2;
cause[1] = GSM48_CAUSE_CS_GSM | GSM48_CAUSE_LOC_USER;
cause[2] = 0x80 | 30; /* response to status inquiry */
call_state = msgb_put(msg, 1);
call_state[0] = 0xc0 | 0x00;
return gsm0408_sendmsg(msg);
}
static int gsm48_cc_rx_status_enq(struct msgb *msg)
{
return gsm48_cc_tx_status(msg->lchan);
}
static int gsm0408_rcv_cc(struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
u_int8_t msg_type = gh->msg_type & 0xbf;
int rc = 0;
switch (msg_type) {
case GSM48_MT_CC_CALL_CONF:
/* Response to SETUP */
DEBUGP(DCC, "CALL CONFIRM\n");
break;
case GSM48_MT_CC_RELEASE_COMPL:
DEBUGP(DCC, "RELEASE COMPLETE\n");
break;
case GSM48_MT_CC_ALERTING:
DEBUGP(DCC, "ALERTING\n");
break;
case GSM48_MT_CC_CONNECT:
DEBUGP(DCC, "CONNECT\n");
/* need to respond with CONNECT_ACK */
break;
case GSM48_MT_CC_RELEASE:
DEBUGP(DCC, "RELEASE\n");
/* need to respond with RELEASE_COMPLETE */
break;
case GSM48_MT_CC_STATUS_ENQ:
rc = gsm48_cc_rx_status_enq(msg);
break;
case GSM48_MT_CC_DISCONNECT:
DEBUGP(DCC, "DISCONNECT\n");
break;
case GSM48_MT_CC_SETUP:
DEBUGP(DCC, "SETUP\n");
/* FIXME: continue with CALL_PROCEEDING, ALERTING, CONNECT, RELEASE_COMPLETE */
break;
case GSM48_MT_CC_EMERG_SETUP:
DEBUGP(DCC, "EMERGENCY SETUP\n");
/* FIXME: continue with CALL_PROCEEDING, ALERTING, CONNECT, RELEASE_COMPLETE */
break;
default:
fprintf(stderr, "Unimplemented GSM 04.08 msg type 0x%02x\n",
msg_type);
break;
}
return rc;
}
/* Chapter 9.2.14 : Send LOCATION UPDATE REJECT */
int gsm0408_loc_upd_rej(struct gsm_lchan *lchan, u_int8_t cause)
@ -462,6 +388,139 @@ static int gsm0408_rcv_rr(struct msgb *msg)
return 0;
}
/* Call Control */
/* Send a 04.08 call control message, add transaction ID and TI flag */
static int gsm48_cc_sendmsg(struct msgb *msg)
{
struct gsm48_hdr *gh = msg->data;
struct gsm_call *call = &msg->lchan->call;
gh->proto_discr |= msg->lchan->call.transaction_id;
/* GSM 04.07 Section 11.2.3.1.3 */
switch (call->type) {
case GSM_CT_MO:
gh->proto_discr |= 0x80;
break;
case GSM_CT_MT:
break;
}
return gsm0408_sendmsg(msg);
}
static int gsm48_cc_tx_status(struct gsm_lchan *lchan)
{
struct msgb *msg = gsm48_msgb_alloc();
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
u_int8_t *cause, *call_state;
msg->lchan = lchan;
gh->proto_discr = GSM48_PDISC_CC;
gh->msg_type = GSM48_MT_CC_STATUS;
cause = msgb_put(msg, 3);
cause[0] = 2;
cause[1] = GSM48_CAUSE_CS_GSM | GSM48_CAUSE_LOC_USER;
cause[2] = 0x80 | 30; /* response to status inquiry */
call_state = msgb_put(msg, 1);
call_state[0] = 0xc0 | 0x00;
return gsm48_cc_sendmsg(msg);
}
static int gsm48_cc_tx_simple(struct gsm_lchan *lchan, u_int8_t msg_type)
{
struct msgb *msg = gsm48_msgb_alloc();
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
msg->lchan = lchan;
gh->proto_discr = GSM48_PDISC_CC;
gh->msg_type = msg_type;
return gsm48_cc_sendmsg(msg);
}
static int gsm48_cc_rx_status_enq(struct msgb *msg)
{
return gsm48_cc_tx_status(msg->lchan);
}
static int gsm48_cc_rx_setup(struct msgb *msg)
{
return gsm48_cc_tx_simple(msg->lchan, GSM48_MT_CC_CALL_CONF);
}
static int gsm0408_rcv_cc(struct msgb *msg)
{
struct gsm48_hdr *gh = msgb_l3(msg);
u_int8_t msg_type = gh->msg_type & 0xbf;
struct gsm_call *call = &msg->lchan->call;
int rc = 0;
switch (msg_type) {
case GSM48_MT_CC_CALL_CONF:
/* Response to SETUP */
DEBUGP(DCC, "CALL CONFIRM\n");
break;
case GSM48_MT_CC_RELEASE_COMPL:
/* Answer from MS to RELEASE */
DEBUGP(DCC, "RELEASE COMPLETE (state->NULL)\n");
call->state = GSM_CSTATE_NULL;
break;
case GSM48_MT_CC_ALERTING:
DEBUGP(DCC, "ALERTING\n");
break;
case GSM48_MT_CC_CONNECT:
DEBUGP(DCC, "CONNECT\n");
/* MT: need to respond with CONNECT_ACK */
rc = gsm48_cc_tx_simple(msg->lchan, GSM48_MT_CC_CONNECT_ACK);
break;
case GSM48_MT_CC_CONNECT_ACK:
/* MO: Answer to CONNECT */
call->state = GSM_CSTATE_ACTIVE;
DEBUGP(DCC, "CONNECT_ACK (state->ACTIVE)\n");
break;
case GSM48_MT_CC_RELEASE:
DEBUGP(DCC, "RELEASE\n");
/* need to respond with RELEASE_COMPLETE */
break;
case GSM48_MT_CC_STATUS_ENQ:
rc = gsm48_cc_rx_status_enq(msg);
break;
case GSM48_MT_CC_DISCONNECT:
/* Section 5.4.3.2 */
DEBUGP(DCC, "DISCONNECT (state->RELEASE_REQ)\n");
call->state = GSM_CSTATE_RELEASE_REQ;
/* FIXME: clear the network connection */
rc = gsm48_cc_tx_simple(msg->lchan, GSM48_MT_CC_RELEASE);
break;
case GSM48_MT_CC_SETUP:
call->type = GSM_CT_MO;
call->state = GSM_CSTATE_INITIATED;
call->transaction_id = gh->proto_discr & 0xf0;
DEBUGP(DCC, "SETUP(tid=0x%02x)\n", call->transaction_id);
rc = gsm48_cc_tx_simple(msg->lchan, GSM48_MT_CC_CONNECT);
/* FIXME: continue with CALL_PROCEEDING, ALERTING, CONNECT, RELEASE_COMPLETE */
break;
case GSM48_MT_CC_EMERG_SETUP:
DEBUGP(DCC, "EMERGENCY SETUP\n");
/* FIXME: continue with CALL_PROCEEDING, ALERTING, CONNECT, RELEASE_COMPLETE */
break;
default:
fprintf(stderr, "Unimplemented GSM 04.08 msg type 0x%02x\n",
msg_type);
break;
}
return rc;
}
/* here we pass in a msgb from the RSL->RLL. We expect the l3 pointer to be set */
int gsm0408_rcvmsg(struct msgb *msg)
{