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mncc: Add handling to connect a MNCC MT call

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This will go through the stage of:

* MNCC_CALL_CONF_IND (to which we create a RTP socket)
* then we might receive a MNCC_ALERT_IND
* and finally the MNCC_SETUP_CNF

For the last two we inform the other leg about the progress.
This commit is contained in:
Holger Hans Peter Freyther
2016-03-31 16:06:04 +02:00
parent 8763cf8850
commit c2474dc0be
1 changed files with 116 additions and 10 deletions
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126
src/mncc.c
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@@ -130,18 +130,11 @@ static void mncc_rtp_send(struct mncc_connection *conn, uint32_t msg_type, uint3
}
}
static void mncc_call_leg_connect(struct call_leg *_leg)
static bool send_rtp_connect(struct mncc_call_leg *leg, struct call_leg *other)
{
struct gsm_mncc_rtp mncc = { 0, };
struct mncc_call_leg *leg;
struct call_leg *other;
int rc;
OSMO_ASSERT(_leg->type == CALL_TYPE_MNCC);
leg = (struct mncc_call_leg *) _leg;
other = call_leg_other(_leg);
/*
* Send RTP CONNECT and we handle the general failure of it by
* tearing down the call.
@@ -160,8 +153,23 @@ static void mncc_call_leg_connect(struct call_leg *_leg)
LOGP(DMNCC, LOGL_ERROR, "Failed to send message leg(%u)\n",
leg->callref);
close_connection(leg->conn);
return;
return false;
}
return true;
}
static void mncc_call_leg_connect(struct call_leg *_leg)
{
struct mncc_call_leg *leg;
struct call_leg *other;
OSMO_ASSERT(_leg->type == CALL_TYPE_MNCC);
leg = (struct mncc_call_leg *) _leg;
other = call_leg_other(_leg);
if (!send_rtp_connect(leg, other))
return;
start_cmd_timer(leg, MNCC_SETUP_COMPL_IND);
mncc_send(leg->conn, MNCC_SETUP_RSP, leg->callref);
@@ -230,7 +238,7 @@ static void close_connection(struct mncc_connection *conn)
conn->on_disconnect(conn);
}
static void continue_call(struct mncc_call_leg *leg)
static void continue_mo_call(struct mncc_call_leg *leg)
{
char *dest, *source;
@@ -249,6 +257,26 @@ static void continue_call(struct mncc_call_leg *leg)
talloc_free(dest);
}
static void continue_mt_call(struct mncc_call_leg *leg)
{
struct call_leg *other_leg;
/* TODO.. check codec selection */
other_leg = call_leg_other(&leg->base);
if (!other_leg)
return;
/* assume the type is compatible */
other_leg->payload_type = leg->base.payload_type;
}
static void continue_call(struct mncc_call_leg *leg)
{
if (leg->dir == MNCC_DIR_MO)
return continue_mo_call(leg);
return continue_mt_call(leg);
}
static void check_rtp_connect(struct mncc_connection *conn, char *buf, int rc)
{
struct gsm_mncc_rtp *rtp;
@@ -497,6 +525,75 @@ static void check_rej_ind(struct mncc_connection *conn, char *buf, int rc)
call_leg_release(&leg->base);
}
static void check_cnf_ind(struct mncc_connection *conn, char *buf, int rc)
{
struct gsm_mncc *data;
struct mncc_call_leg *leg;
leg = find_leg(conn, buf, rc, &data);
if (!leg)
return;
LOGP(DMNCC, LOGL_DEBUG,
"leg(%u) confirmend. creating RTP socket.\n",
leg->callref);
start_cmd_timer(leg, MNCC_RTP_CREATE);
mncc_rtp_send(conn, MNCC_RTP_CREATE, data->callref);
}
static void check_alrt_ind(struct mncc_connection *conn, char *buf, int rc)
{
struct gsm_mncc *data;
struct mncc_call_leg *leg;
struct call_leg *other_leg;
leg = find_leg(conn, buf, rc, &data);
if (!leg)
return;
LOGP(DMNCC, LOGL_DEBUG,
"leg(%u) is alerting.\n", leg->callref);
other_leg = call_leg_other(&leg->base);
if (!other_leg) {
LOGP(DMNCC, LOGL_ERROR, "leg(%u) other leg gone!\n",
leg->callref);
mncc_call_leg_release(&leg->base);
return;
}
other_leg->ring_call(other_leg);
}
static void check_stp_cnf(struct mncc_connection *conn, char *buf, int rc)
{
struct gsm_mncc *data;
struct mncc_call_leg *leg;
struct call_leg *other_leg;
leg = find_leg(conn, buf, rc, &data);
if (!leg)
return;
LOGP(DMNCC, LOGL_DEBUG, "leg(%u) setup completed\n", leg->callref);
other_leg = call_leg_other(&leg->base);
if (!other_leg) {
LOGP(DMNCC, LOGL_ERROR, "leg(%u) other leg gone!\n",
leg->callref);
mncc_call_leg_release(&leg->base);
return;
}
if (!send_rtp_connect(leg, other_leg))
return;
leg->state = MNCC_CC_CONNECTED;
mncc_send(leg->conn, MNCC_SETUP_COMPL_REQ, leg->callref);
other_leg->connect_call(other_leg);
}
static void check_hello(struct mncc_connection *conn, char *buf, int rc)
{
struct gsm_mncc_hello *hello;
@@ -643,6 +740,15 @@ static int mncc_data(struct osmo_fd *fd, unsigned int what)
case MNCC_SETUP_COMPL_IND:
check_stp_cmpl_ind(conn, buf, rc);
break;
case MNCC_SETUP_CNF:
check_stp_cnf(conn, buf, rc);
break;
case MNCC_CALL_CONF_IND:
check_cnf_ind(conn, buf, rc);
break;
case MNCC_ALERT_IND:
check_alrt_ind(conn, buf, rc);
break;
default:
LOGP(DMNCC, LOGL_ERROR, "Unhandled message type %d/0x%x\n",
msg_type, msg_type);