6 Nov
2025
6 Nov
'25
12:03 p.m.
On 11/6/25 12:56 PM, Paolo Abeni wrote:
On 10/30/25 3:34 PM, chia-yu.chang@nokia-bell-labs.com wrote:
From: Chia-Yu Chang chia-yu.chang@nokia-bell-labs.com
Before this patch, num_retrans = 0 for the first SYN/ACK and the first retransmitted SYN/ACK; however, an upcoming change will need to differentiate between those two conditions.
AFAICS, send_synack is invoked with a NULL dst only on retransmissions. Perhaps you could use that info instead? moving forward and backward a counter is not so nice.
... except you need to propagate the information to nested call. Possibly adding a TCP_SYNACK_RETRANS synack_type would fit?
/P