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Harald Welte gerrit-no-reply at lists.osmocom.orgHarald Welte has uploaded this change for review. ( https://gerrit.osmocom.org/13764 Change subject: LLC: Don't blindly assume all LLC frames have data payload ...................................................................... LLC: Don't blindly assume all LLC frames have data payload In reality, only UI, I, SABM, UA and XID frames carry payload. All other frames will have llhp.data == NULL. Let's therefore not do any msgb adjustments unless we actually know there is a user payload field. Change-Id: I51bbd0f2c618d477a037af343ff41de1c8a5a3ae Closes: OS#3952 --- M src/gprs/gprs_llc.c 1 file changed, 8 insertions(+), 3 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-sgsn refs/changes/64/13764/1 diff --git a/src/gprs/gprs_llc.c b/src/gprs/gprs_llc.c index 2111e10..685460d 100644 --- a/src/gprs/gprs_llc.c +++ b/src/gprs/gprs_llc.c @@ -946,9 +946,6 @@ LOGP(DLLC, LOGL_INFO, "Dropping frame with invalid FCS\n"); return -EIO; } - /* set l3 layer & remove the fcs */ - msg->l3h = llhp.data; - msgb_l3trim(msg, llhp.data_len); /* Update LLE's (BVCI, NSEI) tuple */ lle->llme->bvci = msgb_bvci(msg); @@ -959,6 +956,14 @@ if (rc < 0) return rc; + /* there are many frame types that don't carry user information + * and which hence have llhp.data = NULL */ + if (llhp.data) { + /* set l3 layer & remove the fcs */ + msg->l3h = llhp.data; + msgb_l3trim(msg, llhp.data_len); + } + rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_LLC_UL_PACKETS]); rate_ctr_add(&sgsn->rate_ctrs->ctr[CTR_LLC_UL_BYTES], msg->len); -- To view, visit https://gerrit.osmocom.org/13764 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-sgsn Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: I51bbd0f2c618d477a037af343ff41de1c8a5a3ae Gerrit-Change-Number: 13764 Gerrit-PatchSet: 1 Gerrit-Owner: Harald Welte <laforge at gnumonks.org> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20190423/006c599d/attachment.htm>