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authorFlorin Coras <fcoras@cisco.com>2023-11-01 13:44:28 -0700
committerDave Barach <vpp@barachs.net>2023-11-01 22:58:32 +0000
commitd3ef00098cd27e01bb24db15e3440fabbc025aa8 (patch)
tree2c1dfbcac1612dc3c75f20cbfc7d7d6899f150be /src
parent7499591bfff975e99ede3a9060abac51395d209a (diff)
tcp: remove redundant ack checks
Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I4001f39afde8c33b60c15f74034bcce013fbbf70
Diffstat (limited to 'src')
-rw-r--r--src/vnet/tcp/tcp_input.c18
1 files changed, 0 insertions, 18 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 5e85f13cbac..88ae0a32b60 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -362,17 +362,10 @@ tcp_rcv_ack_no_cc (tcp_connection_t * tc, vlib_buffer_t * b, u32 * error)
if (!(seq_leq (tc->snd_una, vnet_buffer (b)->tcp.ack_number)
&& seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)))
{
- if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)
- && seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_una))
- {
- tc->snd_nxt = vnet_buffer (b)->tcp.ack_number;
- goto acceptable;
- }
*error = TCP_ERROR_ACK_INVALID;
return -1;
}
-acceptable:
tc->bytes_acked = vnet_buffer (b)->tcp.ack_number - tc->snd_una;
tc->snd_una = vnet_buffer (b)->tcp.ack_number;
*error = TCP_ERROR_ACK_OK;
@@ -939,15 +932,6 @@ tcp_rcv_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b,
/* If the ACK acks something not yet sent (SEG.ACK > SND.NXT) */
if (PREDICT_FALSE (seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)))
{
- /* We've probably entered recovery and the peer still has some
- * of the data we've sent. Update snd_nxt and accept the ack */
- if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)
- && seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_una))
- {
- tc->snd_nxt = vnet_buffer (b)->tcp.ack_number;
- goto process_ack;
- }
-
tc->errors.above_ack_wnd += 1;
*error = TCP_ERROR_ACK_FUTURE;
TCP_EVT (TCP_EVT_ACK_RCV_ERR, tc, 0, vnet_buffer (b)->tcp.ack_number);
@@ -970,8 +954,6 @@ tcp_rcv_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b,
return 0;
}
-process_ack:
-
/*
* Looks okay, process feedback
*/