08:22:27.137358 IP node2.46772 > node1.websm: Flags [S], seq 2005546350, win 14600, options [mss 1460,sackOK,TS val 86899574 ecr 0,nop,wscale 7], length 0
08:22:27.137613 IP node1.websm > node2.46772: Flags [S.], seq 71170429, ack 2005546351, win 14480, options [mss 1460,sackOK,TS val 93251074 ecr 86899574,nop,wscale 6], length 0
08:22:27.137648 IP node2.46772 > node1.websm: Flags [.], ack 1, win 115, options [nop,nop,TS val 86899574 ecr 93251074], length 0
08:22:27.137922 IP node2.46772 > node1.websm: Flags [F.], seq 1, ack 1, win 115, options [nop,nop,TS val 86899575 ecr 93251074], length 0
08:22:27.139026 IP node1.websm > node2.46772: Flags [.], ack 2, win 227, options [nop,nop,TS val 93251076 ecr 86899575], length 0
为什么第3个包ack为1 而不是71170429+1呢
三次握手显示前两个都是双方的起始序列号，需要显示绝对，后面的就都是相对了