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tcp_input: Add condition to check sndseq and ackseq equality

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When triggering TCP retransmission through a timer, conn->unacked_q will save more packets, which may result in sndseq being equal to ackseq. Previous implementations may cause conn->nrtx to not be cleared, leading to an increase in conn->rto errors and a longer timer time

Signed-off-by: wangchen <wangchen41@xiaomi.com>
This commit is contained in:
wangchen
2025-07-04 10:40:08 +08:00
committed by Xiang Xiao
parent eae67ef9a5
commit 6cf4c95517
1 changed files with 1 additions and 1 deletions
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net/tcp/tcp_input.c
+1 -1
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@@ -1070,7 +1070,7 @@ found:
*/ */
uint32_t sndseq = tcp_getsequence(conn->sndseq); uint32_t sndseq = tcp_getsequence(conn->sndseq);
if (TCP_SEQ_LT(sndseq, ackseq)) if (TCP_SEQ_LTE(sndseq, ackseq))
{ {
ninfo("sndseq: %08" PRIx32 "->%08" PRIx32 ninfo("sndseq: %08" PRIx32 "->%08" PRIx32
" unackseq: %08" PRIx32 " new tx_unacked: %" PRIu32 "\n", " unackseq: %08" PRIx32 " new tx_unacked: %" PRIu32 "\n",