Hi experts,
For the No.6 [TCP ACKed unseen segment], is the value of maxseqtobeacked 21? No.4 NextSeqNum？
No. Source Destination Protocol Seq NextSeq Ack Length Info
1 client server TCP 0 1 0 64 37353 > 8080 [SYN] Seq=0 Win=16000 Len=0 MSS=1460
2 server client TCP 0 1 1 64 8080 > 37353 [SYN, ACK] Seq=0 Ack=1 Win=64240 Len=0 MSS=1460
3 client server TCP 1 1 1 60 37353 > 8080 [ACK] Seq=1 Ack=1 Win=16000 Len=0
4 client server TCP 1 21 1 80 37353 > 8080 [PSH, ACK] Seq=1 Ack=1 Win=15000 Len=20
5 server client TCP 1 1 21 60 8080 > 37353 [ACK] Seq=1 Ack=21 Win=64220 Len=0
6 server client TCP 1 1 41 60 [TCP ACKed unseen segment] 8080 > 37353 [ACK] Seq=1 Ack=41 Win=64200 Len=0
7 client server TCP 41 61 1 80 [TCP Previous segment not captured] 37353 > 8080 [PSH, ACK] Seq=41 Ack=1 Win=15000 Len=20 [TCP segment of a reassembled PDU]
8 server client TCP 1 1 61 60 8080 > 37353 [ACK] Seq=1 Ack=61 Win=64180 Len=0
/* ACKED LOST PACKET*/
if( tcpd->rev->tcp_analyze_seq_info->maxseqtobeacked
&& GT_SEQ(ack, tcpd->rev->tcp_analyze_seq_info->maxseqtobeacked )
&& (flags&(TH_ACK))!=0 )
Regards, 7ACE