diff mbox series

[v2] ip_frag: recalculate data length of fragment

Message ID 1606098435-15804-1-git-send-email-luyicai@huawei.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers
Series [v2] ip_frag: recalculate data length of fragment |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS
ci/Intel-compilation success Compilation OK
ci/iol-testing warning Testing issues
ci/travis-robot success Travis build: passed

Commit Message

Yicai Lu Nov. 23, 2020, 2:27 a.m. UTC 
  In some situations, we would get several ip fragments, which total
data length is less than minimum frame(64) and padding with zeros.
Examples: Second Fragment "a0a1 a2a3 a4a5 a6a7 0000 0000 ..."
and Third Fragment "a8a9 aaab acad aeaf b0b1 b2b3 ...".
Finally, we would reassemble Second and Third Fragment like this
"a0a1 a2a3 a4a5 a6a7 0000 0000 ... a8a9 aaab acad aeaf b0b1 ...",
which is not correct!
So, we need recalculate data length of fragment to remove padings!

Fixes: 416707812c03 ("ip_frag: refactor reassembly code into a proper library")
Cc: anatoly.burakov@intel.com

Signed-off-by: Yicai Lu <luyicai@huawei.com>
---
v1 -> v2: Adjust commit info style
---
 lib/librte_ip_frag/ip_frag_internal.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/lib/librte_ip_frag/ip_frag_internal.c b/lib/librte_ip_frag/ip_frag_internal.c
index b436a4c..7bdd980 100644
--- a/lib/librte_ip_frag/ip_frag_internal.c
+++ b/lib/librte_ip_frag/ip_frag_internal.c
@@ -155,6 +155,7 @@  struct rte_mbuf *
 
 	fp->frags[idx].ofs = ofs;
 	fp->frags[idx].len = len;
+	mb->data_len = mb->l2_len + mb->l3_len + len;
 	fp->frags[idx].mb = mb;
 
 	mb = NULL;