diff options
| author | Harald Welte <laforge@gnumonks.org> | 2015-12-25 22:31:36 +0100 |
|---|---|---|
| committer | Daniel Willmann <dwillmann@sysmocom.de> | 2016-02-04 15:41:26 +0100 |
| commit | 1be432df79acda9a0e478a5dce9561411e2a7de9 (patch) | |
| tree | 78defa90c414e9e6615ea5326cffdd745c238ae6 | |
| parent | 1a94a4024066f1ce0c7ff948bde899feaba7aad8 (diff) | |
gprs_gmm.c: Preform LLME operations only if we have one
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.
| -rw-r--r-- | openbsc/src/gprs/gprs_gmm.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/openbsc/src/gprs/gprs_gmm.c b/openbsc/src/gprs/gprs_gmm.c index d5cc65828..4bde55454 100644 --- a/openbsc/src/gprs/gprs_gmm.c +++ b/openbsc/src/gprs/gprs_gmm.c @@ -1175,10 +1175,12 @@ static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, /* Look-up the MM context based on old RA-ID and TLLI */ mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id); if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) { - /* 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 */ @@ -1281,7 +1283,7 @@ 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"); |