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From: Yicai Lu <luyicai@huawei.com>
To: <dev@dpdk.org>
Cc: <konstantin.ananyev@intel.com>, <zhoujingbin@huawei.com>,
	<chenchanghu@huawei.com>, <jerry.lilijun@huawei.com>,
	<haifeng.lin@huawei.com>, <guohongzhi1@huawei.com>,
	<wangyunjian@huawei.com>,  Yicai Lu <luyicai@huawei.com>
Subject: [dpdk-dev] [PATCH] ip_frag: recalculate data length of fragment
Date: Wed, 18 Nov 2020 21:29:53 +0800
Message-ID: <1605706193-17192-1-git-send-email-luyicai@huawei.com> (raw)

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 is "a0a1 a2a3 a4a5 a6a7 0000 0000 ..."
and Third Fragment is "a8a9 aaab acad aeaf b0b1 b2b3 ...".
And then, 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 the data length 
of fragment to remove invalid padings(zero)!

Signed-off-by: Yicai Lu <luyicai@huawei.com>
---
 lib/librte_ip_frag/ip_frag_internal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/librte_ip_frag/ip_frag_internal.c b/lib/librte_ip_frag/ip_frag_internal.c
index b436a4c93..7bdd98090 100644
--- a/lib/librte_ip_frag/ip_frag_internal.c
+++ b/lib/librte_ip_frag/ip_frag_internal.c
@@ -155,6 +155,7 @@ ip_frag_process(struct ip_frag_pkt *fp, struct rte_ip_frag_death_row *dr,
 
 	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;
-- 
2.28.0.windows.1


             reply	other threads:[~2020-11-18 13:30 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-18 13:29 Yicai Lu [this message]
2020-11-22 11:22 ` Thomas Monjalon
2020-11-23  2:27 ` [dpdk-dev] [PATCH v2] " Yicai Lu
2020-12-12 11:05 ` [dpdk-dev] [PATCH v5] ip_frag: remove padding " Yicai Lu
2020-12-14 14:44   ` Ananyev, Konstantin
2020-12-15  3:18     ` luyicai
2020-12-16 10:44       ` Ananyev, Konstantin
2020-12-16 10:54         ` luyicai
2020-12-16 13:36 ` [dpdk-dev] [PATCH v6] " Yicai Lu
2020-12-18 11:41   ` Ananyev, Konstantin
2021-01-15 10:29     ` [dpdk-dev] [dpdk-stable] " Thomas Monjalon

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