laforge submitted this change.
gprs_ms_net_cap_gea_mask(): protect against empty MS Network Capabilities
When the MS Network Capability is empty, expect to support at least
unencrypted communications.
This shouldn't be empty at all, as the minimum length of it is 2 when
the MS/UE is doing an Attach Request.
But when receiving a MS/UE SGSN Context via Gn, the field
is optional.
The MS/UE shall include it into the Routing Area Request,
but not must.
Change-Id: Ieef2e3eeaaadc90c35fff6f20d47bd36aaa4b9e6
---
M src/sgsn/gprs_gmm.c
1 file changed, 4 insertions(+), 0 deletions(-)
diff --git a/src/sgsn/gprs_gmm.c b/src/sgsn/gprs_gmm.c
index 80c2148..e49e611 100644
--- a/src/sgsn/gprs_gmm.c
+++ b/src/sgsn/gprs_gmm.c
@@ -1201,6 +1201,10 @@
static uint8_t gprs_ms_net_cap_gea_mask(const uint8_t *ms_net_cap, uint8_t cap_len)
{
uint8_t mask = (1 << GPRS_ALGO_GEA0);
+
+ if (cap_len == 0)
+ return mask;
+
mask |= (0x80 & ms_net_cap[0]) ? (1 << GPRS_ALGO_GEA1) : 0;
if (cap_len < 2)
To view, visit change 39243. To unsubscribe, or for help writing mail filters, visit settings.