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authorKeith <keith@rhizomatica.org>2019-08-07 03:20:53 +0200
committerKeith <keith@rhizomatica.org>2019-08-07 13:10:51 +0200
commiteb0a93e037639de95f38dec107a06124965e6826 (patch)
tree8140cf9ba4f28b8a1928b6d7f2108ba356ebc74b
parentb43c296f19e1b210761a604e023a8f9520dfb479 (diff)
In hold/retrieve/reinvite, add check that other_leg exists
We should always check that the other leg did not somehow dissapear before accessing it. Change-Id: I947aab6c0cc5019929bde1c7012e1a8c3d3472a5
-rw-r--r--src/mncc.c14
-rw-r--r--src/sip.c17
2 files changed, 31 insertions, 0 deletions
diff --git a/src/mncc.c b/src/mncc.c
index 739f50b..f5a44d5 100644
--- a/src/mncc.c
+++ b/src/mncc.c
@@ -703,6 +703,12 @@ static void check_hold_ind(struct mncc_connection *conn, const char *buf, int rc
LOGP(DMNCC, LOGL_DEBUG,
"leg(%u) is requesting hold.\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_send(leg->conn, MNCC_HOLD_REJ, leg->callref);
+ return;
+ }
other_leg->hold_call(other_leg);
mncc_send(leg->conn, MNCC_HOLD_CNF, leg->callref);
leg->state = MNCC_CC_HOLD;
@@ -721,6 +727,14 @@ static void check_retrieve_ind(struct mncc_connection *conn, const char *buf, in
LOGP(DMNCC, LOGL_DEBUG,
"leg(%u) is requesting unhold.\n", leg->callref);
other_leg = call_leg_other(&leg->base);
+ if (!other_leg) {
+ /* The SIP leg went away while we were holding! */
+ LOGP(DMNCC, LOGL_ERROR, "leg(%u) other leg gone!\n",
+ leg->callref);
+ mncc_send(leg->conn, MNCC_RETRIEVE_CNF, leg->callref);
+ mncc_call_leg_release(&leg->base);
+ return;
+ }
other_leg->retrieve_call(other_leg);
mncc_send(leg->conn, MNCC_RETRIEVE_CNF, leg->callref);
/* In case of call waiting/swap, At this point we need to tell the MSC to send
diff --git a/src/sip.c b/src/sip.c
index 103eb33..2b28b4e 100644
--- a/src/sip.c
+++ b/src/sip.c
@@ -193,6 +193,13 @@ static void sip_handle_reinvite(struct sip_call_leg *leg, nua_handle_t *nh, cons
LOGP(DSIP, LOGL_INFO, "re-INVITE for call %s\n", sip->sip_call_id->i_id);
struct call_leg *other = call_leg_other(&leg->base);
+
+ if (!other) {
+ LOGP(DMNCC, LOGL_ERROR, "leg(%p) other leg gone!\n", leg);
+ sip_release_call(&leg->base);
+ return;
+ }
+
if (!sdp_get_sdp_mode(sip, &mode)) {
/* re-INVITE with no SDP.
* We should respond with SDP reflecting current session
@@ -540,6 +547,11 @@ static void sip_hold_call(struct call_leg *_leg)
OSMO_ASSERT(_leg->type == CALL_TYPE_SIP);
leg = (struct sip_call_leg *) _leg;
other_leg = call_leg_other(&leg->base);
+ if (!other_leg) {
+ LOGP(DMNCC, LOGL_ERROR, "leg(%p) other leg gone!\n", leg);
+ sip_release_call(&leg->base);
+ return;
+ }
char *sdp = sdp_create_file(leg, other_leg, sdp_sendonly);
nua_invite(leg->nua_handle,
NUTAG_MEDIA_ENABLE(0),
@@ -557,6 +569,11 @@ static void sip_retrieve_call(struct call_leg *_leg)
OSMO_ASSERT(_leg->type == CALL_TYPE_SIP);
leg = (struct sip_call_leg *) _leg;
other_leg = call_leg_other(&leg->base);
+ if (!other_leg) {
+ LOGP(DMNCC, LOGL_ERROR, "leg(%p) other leg gone!\n", leg);
+ sip_release_call(&leg->base);
+ return;
+ }
char *sdp = sdp_create_file(leg, other_leg, sdp_sendrecv);
nua_invite(leg->nua_handle,
NUTAG_MEDIA_ENABLE(0),