diff options
| author | Harald Welte <laforge@gnumonks.org> | 2010-12-23 23:34:43 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2010-12-23 23:38:02 +0100 |
| commit | f6bd340df6bcac716da78da8e35f379a7b853027 (patch) | |
| tree | 13818dba492f0d54c6b217f498348d250f48cf0d /openbsc/src/gprs/gprs_gmm.c | |
| parent | 985263e55f3b78cf3c67b2dc39edab4c6bf62ad4 (diff) | |
GPRS/GMM: Correctly look up MM Context in RA Update
If a MS changes RA, the RA will arrive in the new cell using the old
TLLI (masked as foreign TLLI). So we need to look-up the TLLI
in a special way, using the old RA as indicated in the 04.08 GMM
message.
There is still another bug remaining: As we somehow create a new LLC,
the sequence numbers of our responses start from 0 again, which is not
what the MS expects. This needs to be fixed in a follow-up patch.
Diffstat (limited to 'openbsc/src/gprs/gprs_gmm.c')
| -rw-r--r-- | openbsc/src/gprs/gprs_gmm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/openbsc/src/gprs/gprs_gmm.c b/openbsc/src/gprs/gprs_gmm.c index 817092e31..82a4ca85b 100644 --- a/openbsc/src/gprs/gprs_gmm.c +++ b/openbsc/src/gprs/gprs_gmm.c @@ -899,6 +899,7 @@ 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) { /* The MS has to perform GPRS attach */ DEBUGPC(DMM, " REJECT\n"); |