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gprs_gmm.c: Perform LLME operations only if we have one

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In case the GMM message did not arrive over a Gb interface, there is no
LLME (and thus the associated pointer is NULL).  Don't try to perform
operations on a NULL LLME.

Change-Id: If7f24161cd2826f8ee238d4bc1090adf555cea4e
This commit is contained in:
Harald Welte
2015-12-25 22:31:36 +01:00
committed by Neels Hofmeyr
parent dbc72b37ee
commit 2b2429eb59
1 changed files with 7 additions and 5 deletions
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12
openbsc/src/gprs/gprs_gmm.c
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@@ -1208,10 +1208,12 @@ static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
}
if (!mmctx) {
/* send a XID reset to re-set all LLC sequence numbers
* in the MS */
LOGMMCTXP(LOGL_NOTICE, mmctx, "LLC XID RESET\n");
gprs_llgmm_reset(llme);
if (llme) {
/* send a XID reset to re-set all LLC sequence numbers
* in the MS */
LOGMMCTXP(LOGL_NOTICE, mmctx, "LLC XID RESET\n");
gprs_llgmm_reset(llme);
}
/* The MS has to perform GPRS attach */
/* Device is still IMSI attached for CS but initiate GPRS ATTACH,
* see GSM 04.08, 4.7.5.1.4 and G.6 */
@@ -1314,7 +1316,7 @@ static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
/* MMCTX can be NULL when called */
if (!mmctx &&
if (llme && !mmctx &&
gh->msg_type != GSM48_MT_GMM_ATTACH_REQ &&
gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) {
LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n");