socket客戶(hù)端端口問(wèn)題

z32556601

我寫(xiě)的服務(wù)器端程序監(jiān)聽(tīng)在8089端口.
通過(guò)tcpdump抓(ＨＴＴＰ)包發(fā)現(xiàn)一次連接客戶(hù)端為什么會(huì)用兩個(gè)端口(４２０６９,４２０７０),而且是緊挨著的.

13:40:23.526549 IP localhost.42069 > localhost.8089: Flags [S], seq 2403824144, win 32792, options [mss 16396,sackOK,TS val 4065915 ecr 0,nop,wscale 4], length 0
13:40:23.526582 IP localhost.8089 > localhost.42069: Flags [S.], seq 4169872793, ack 2403824145, win 32768, options [mss 16396,sackOK,TS val 4065915 ecr 4065915,nop,wscale 4], length 0
13:40:23.526605 IP localhost.42069 > localhost.8089: Flags [.], ack 1, win 2050, options [nop,nop,TS val 4065915 ecr 4065915], length 0
13:40:23.527479 IP localhost.42069 > localhost.8089: Flags [P.], seq 1:401, ack 1, win 2050, options [nop,nop,TS val 4065915 ecr 4065915], length 400
13:40:23.527520 IP localhost.8089 > localhost.42069: Flags [.], ack 401, win 2048, options [nop,nop,TS val 4065915 ecr 4065915], length 0
13:40:23.528272 IP localhost.8089 > localhost.42069: Flags [F.], seq 1, ack 401, win 2048, options [nop,nop,TS val 4065915 ecr 4065915], length 0
13:40:23.528525 IP localhost.42070 > localhost.8089: Flags [S], seq 2836855418, win 32792, options [mss 16396,sackOK,TS val 4065915 ecr 0,nop,wscale 4], length 0
13:40:23.528549 IP localhost.8089 > localhost.42070: Flags [S.], seq 3932348166, ack 2836855419, win 32768, options [mss 16396,sackOK,TS val 4065915 ecr 4065915,nop,wscale 4], length 0
13:40:23.528566 IP localhost.42070 > localhost.8089: Flags [.], ack 1, win 2050, options [nop,nop,TS val 4065915 ecr 4065915], length 0
13:40:23.529179 IP localhost.42069 > localhost.8089: Flags [.], ack 2, win 2050, options [nop,nop,TS val 4065916 ecr 4065915], length 0
13:40:23.529745 IP localhost.42069 > localhost.8089: Flags [F.], seq 401, ack 2, win 2050, options [nop,nop,TS val 4065916 ecr 4065915], length 0
13:40:23.529796 IP localhost.8089 > localhost.42069: Flags [.], ack 402, win 2048, options [nop,nop,TS val 4065916 ecr 4065916], length 0
13:40:42.061317 IP localhost.42070 > localhost.8089: Flags [F.], seq 1, ack 1, win 2050, options [nop,nop,TS val 4070549 ecr 4065915], length 0
13:40:42.061359 IP localhost.8089 > localhost.42070: Flags [F.], seq 1, ack 2, win 2048, options [nop,nop,TS val 4070549 ecr 4070549], length 0
13:40:42.061368 IP localhost.42070 > localhost.8089: Flags [.], ack 2, win 2050, options [nop,nop,TS val 4070549 ecr 4070549], length 0

linux_c_py_php

客戶(hù)端創(chuàng)建了2個(gè)socket不行嗎

z32556601

回復(fù) 2# linux_c_py_php

為什么一次通信要?jiǎng)?chuàng)建兩個(gè)socket.(每次都是緊挨著的兩個(gè)端口)


   

linux_c_py_php

問(wèn)客戶(hù)端啊, chrome創(chuàng)建N個(gè)socket請(qǐng)求你都是正常的, 一個(gè)拉頁(yè)面, 一個(gè)拉js,css

z32556601

回復(fù) 4# linux_c_py_php
了解了..突然明白了.


   

z32556601

回復(fù) 4# linux_c_py_php

我打印請(qǐng)求..第一個(gè)是http請(qǐng)求.第二個(gè)是空的(不是ＨＴＴＰ請(qǐng)求了).這是為啥?