llc: Log rx PDUs with invalid FCS

Change-Id: Ie52ced7e074a3d4451447551e1ac166397ee8a48
---
M src/llc/llc.c
1 file changed, 12 insertions(+), 2 deletions(-)


git pull ssh://gerrit.osmocom.org:29418/libosmo-gprs refs/changes/24/34024/1

diff --git a/src/llc/llc.c b/src/llc/llc.c
index cff6c16..be1ebec 100644
--- a/src/llc/llc.c
+++ b/src/llc/llc.c
@@ -844,8 +844,9 @@
 	if (~pdu_dec->flags & OSMO_GPRS_LLC_PDU_F_PROT_MODE)
 		crc_length = OSMO_MIN(crc_length, UI_HDR_LEN + N202);
 	if (pdu_dec->fcs != gprs_llc_fcs(ll_pdu, crc_length)) {
-		LOGLLE(lle, LOGL_NOTICE, "Dropping frame with invalid FCS 0x%06x vs exp 0x%06x\n",
-		       pdu_dec->fcs, gprs_llc_fcs(ll_pdu, crc_length));
+		LOGLLE(lle, LOGL_NOTICE, "Dropping frame with invalid FCS 0x%06x vs exp 0x%06x: %s\n",
+		       pdu_dec->fcs, gprs_llc_fcs(ll_pdu, crc_length),
+		       osmo_hexdump(ll_pdu, ll_pdu_len));
 		return -EIO;
 	}
 

