https://wiki.riguz.com/index.php?action=history&feed=atom&title=TCP_Packet_Example TCP Packet Example - 版本历史 2026-06-02T21:25:05Z 本wiki上该页面的版本历史 MediaWiki 1.42.3 https://wiki.riguz.com/index.php?title=TCP_Packet_Example&diff=3437&oldid=prev Riguz：​Riguz moved page Blog:TCP(2)：TCP报文实例 to TCP Packet Example without leaving a redirect 2023-12-06T01:56:02Z <p>Riguz moved page <a href="/index.php?title=Blog:TCP(2)%EF%BC%9ATCP%E6%8A%A5%E6%96%87%E5%AE%9E%E4%BE%8B&amp;action=edit&amp;redlink=1" class="new" title="Blog:TCP(2)：TCP报文实例（页面不存在）">Blog:TCP(2)：TCP报文实例</a> to <a href="/TCP_Packet_Example" title="TCP Packet Example">TCP Packet Example</a> without leaving a redirect</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2023年12月6日 (三) 01:56的版本</td> </tr><tr><td colspan="4" class="diff-notice" lang="zh-Hans-CN"><div class="mw-diff-empty">（没有差异）</div> </td></tr> <!-- diff cache key wiki_db:diff:1.41:old-3436:rev-3437 --> </table> Riguz https://wiki.riguz.com/index.php?title=TCP_Packet_Example&diff=3436&oldid=prev 2023年12月6日 (三) 01:55 Riguz 2023-12-06T01:55:30Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2023年12月6日 (三) 01:55的版本</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l193">第193行：</td> <td colspan="2" class="diff-lineno">第193行：</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Network]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Network]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Protocol]]</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:TCP/IP]]</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:RFC]]</ins></div></td></tr> <!-- diff cache key wiki_db:diff:1.41:old-2481:rev-3436:php=table --> </table> Riguz https://wiki.riguz.com/index.php?title=TCP_Packet_Example&diff=2481&oldid=prev Riguz：​/* 序列号与ACK */ 2021-07-12T13:28:31Z <p><span dir="auto"><span class="autocomment">序列号与ACK</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2021年7月12日 (一) 13:28的版本</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l192">第192行：</td> <td colspan="2" class="diff-lineno">第192行：</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># (Client) ACK, Seq=3261314642, ACK=1175996047=</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># (Client) ACK, Seq=3261314642, ACK=1175996047=</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category:<del style="font-weight: bold; text-decoration: none;">Web</del>]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category:<ins style="font-weight: bold; text-decoration: none;">Network</ins>]]</div></td></tr> <!-- diff cache key wiki_db:diff:1.41:old-2480:rev-2481:php=table --> </table> Riguz https://wiki.riguz.com/index.php?title=TCP_Packet_Example&diff=2480&oldid=prev 2021年4月30日 (五) 07:55 Riguz 2021-04-30T07:55:34Z <p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="zh-Hans-CN"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2021年4月30日 (五) 07:55的版本</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l182">第182行：</td> <td colspan="2" class="diff-lineno">第182行：</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>= 序列号与ACK=</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>= 序列号与ACK=</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">1. </del>(Client) SYN, Seq=3261314628</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Client) SYN, Seq=3261314628</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Server) SYN/ACK, Seq=1175996045, ACK=3261314629=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Server) SYN/ACK, Seq=1175996045, ACK=3261314629=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Client) ACK, Seq=3261314629, ACK=1175996046=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Client) ACK, Seq=3261314629, ACK=1175996046=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Client) PSH/ACK, Seq=3261314629, ACK=1175996046, Data(12bytes)=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Client) PSH/ACK, Seq=3261314629, ACK=1175996046, Data(12bytes)=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Server) ACK, Seq=1175996046, ACK=3261314641=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Server) ACK, Seq=1175996046, ACK=3261314641=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Client) FIN/ACK, Seq=3261314641, ACK=1175996046=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Client) FIN/ACK, Seq=3261314641, ACK=1175996046=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Server) ACK, Seq=1175996046, ACK=3261314642=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Server) ACK, Seq=1175996046, ACK=3261314642=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Server) FIN, ACK, Seq=1175996046, ACK=3261314642=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Server) FIN, ACK, Seq=1175996046, ACK=3261314642=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=. </del>(Client) ACK, Seq=3261314642, ACK=1175996047=</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"># </ins>(Client) ACK, Seq=3261314642, ACK=1175996047=</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Web]]</ins></div></td></tr> <!-- diff cache key wiki_db:diff:1.41:old-2479:rev-2480:php=table --> </table> Riguz https://wiki.riguz.com/index.php?title=TCP_Packet_Example&diff=2479&oldid=prev imported>Riguz：​TCP每个报文都有一个序列号，这个序列号在初始的时候是随机生成的（而不是直接使用0或者1），那么这样做的原因究竟是为什么？ 2020-09-14T00:00:00Z <p>TCP每个报文都有一个序列号，这个序列号在初始的时候是随机生成的（而不是直接使用0或者1），那么这样做的原因究竟是为什么？</p> <p><b>新页面</b></p><div><br /> TCP每个报文都有一个序列号，这个序列号在初始的时候是随机生成的（而不是直接使用0或者1），那么这样做的原因究竟是为什么？<br /> <br /> <br /> = TCP 实例=<br /> 使用[https://www.wireshark.org/ Wireshark]和[https://sourceforge.net/projects/sockettest/ SocketTest]在本地进行数据发送和接收，可以抓取到TCP报文。首先使用SocketTest在本地(127.0.0.1)的10240端口上启动一个Socket服务器，然后使用它的客户端功能连接这个端口，并在Wireshark中监听本地回环网卡(localhost)，即可抓取到对应的数据包。<br /> <br /> == 三次握手==<br /> <br /> [[File:Wireshark-lo-1.png|600px|3-way Handshake]]<br /> <br /> 可以看出，是一个标准的三次握手的过程，握手完成之后，服务端给客户端发送了一个Window Update。<br /> <br /> === 1:客户端发送SYN===<br /> <br /> &lt;syntaxhighlight lang=&quot;lua&quot;&gt;<br /> Frame 13: 68 bytes on wire (544 bits), 68 bytes captured (544 bits) on interface lo0, id 0<br /> Null/Loopback<br /> Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1<br /> Transmission Control Protocol, Src Port: 64255, Dst Port: 10240, Seq: 0, Len: 0<br /> Source Port: 64255<br /> Destination Port: 10240<br /> [Stream index: 0]<br /> [TCP Segment Len: 0]<br /> Sequence number: 0 (relative sequence number)<br /> Sequence number (raw): 3261314628<br /> [Next sequence number: 1 (relative sequence number)]<br /> Acknowledgment number: 0<br /> Acknowledgment number (raw): 0<br /> 1011 .... = Header Length: 44 bytes (11)<br /> Flags: 0x002 (SYN)<br /> Window size value: 65535<br /> [Calculated window size: 65535]<br /> Checksum: 0xfe34 [unverified]<br /> [Checksum Status: Unverified]<br /> Urgent pointer: 0<br /> Options: (24 bytes), Maximum segment size, No-Operation (NOP), Window scale, No-Operation (NOP), No-Operation (NOP), Timestamps, SACK permitted, End of Option List (EOL)<br /> TCP Option - Maximum segment size: 16344 bytes<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - Window scale: 6 (multiply by 64)<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - Timestamps: TSval 740812626, TSecr 0<br /> TCP Option - SACK permitted<br /> TCP Option - End of Option List (EOL)<br /> [Timestamps]<br /> &lt;/syntaxhighlight&gt;<br /> <br /> === 2:服务端回复SYN/ACK===<br /> <br /> &lt;syntaxhighlight lang=&quot;lua&quot;&gt;<br /> Frame 14: 68 bytes on wire (544 bits), 68 bytes captured (544 bits) on interface lo0, id 0<br /> Null/Loopback<br /> Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1<br /> Transmission Control Protocol, Src Port: 10240, Dst Port: 64255, Seq: 0, Ack: 1, Len: 0<br /> Source Port: 10240<br /> Destination Port: 64255<br /> [Stream index: 0]<br /> [TCP Segment Len: 0]<br /> Sequence number: 0 (relative sequence number)<br /> Sequence number (raw): 1175996045<br /> [Next sequence number: 1 (relative sequence number)]<br /> Acknowledgment number: 1 (relative ack number)<br /> Acknowledgment number (raw): 3261314629<br /> 1011 .... = Header Length: 44 bytes (11)<br /> Flags: 0x012 (SYN, ACK)<br /> Window size value: 65535<br /> [Calculated window size: 65535]<br /> Checksum: 0xfe34 [unverified]<br /> [Checksum Status: Unverified]<br /> Urgent pointer: 0<br /> Options: (24 bytes), Maximum segment size, No-Operation (NOP), Window scale, No-Operation (NOP), No-Operation (NOP), Timestamps, SACK permitted, End of Option List (EOL)<br /> TCP Option - Maximum segment size: 16344 bytes<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - Window scale: 6 (multiply by 64)<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - Timestamps: TSval 740812626, TSecr 740812626<br /> TCP Option - SACK permitted<br /> TCP Option - End of Option List (EOL)<br /> [SEQ/ACK analysis]<br /> [Timestamps]<br /> <br /> &lt;/syntaxhighlight&gt;<br /> <br /> === 3:客户端回复ACK===<br /> <br /> &lt;syntaxhighlight lang=&quot;lua&quot;&gt;<br /> Frame 15: 56 bytes on wire (448 bits), 56 bytes captured (448 bits) on interface lo0, id 0<br /> Null/Loopback<br /> Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1<br /> Transmission Control Protocol, Src Port: 64255, Dst Port: 10240, Seq: 1, Ack: 1, Len: 0<br /> Source Port: 64255<br /> Destination Port: 10240<br /> [Stream index: 0]<br /> [TCP Segment Len: 0]<br /> Sequence number: 1 (relative sequence number)<br /> Sequence number (raw): 3261314629<br /> [Next sequence number: 1 (relative sequence number)]<br /> Acknowledgment number: 1 (relative ack number)<br /> Acknowledgment number (raw): 1175996046<br /> 1000 .... = Header Length: 32 bytes (8)<br /> Flags: 0x010 (ACK)<br /> Window size value: 6379<br /> [Calculated window size: 408256]<br /> [Window size scaling factor: 64]<br /> Checksum: 0xfe28 [unverified]<br /> [Checksum Status: Unverified]<br /> Urgent pointer: 0<br /> Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - Timestamps: TSval 740812626, TSecr 740812626<br /> [SEQ/ACK analysis]<br /> [Timestamps]<br /> <br /> &lt;/syntaxhighlight&gt;<br /> <br /> == 数据发送==<br /> 通过像服务器发送一个&quot;helloworld&quot;来查看数据是如何发送的：<br /> <br /> === 1:客户端发送PSH/ACK===<br /> &lt;syntaxhighlight lang=&quot;lua&quot;&gt;<br /> Transmission Control Protocol, Src Port: 64255, Dst Port: 10240, Seq: 1, Ack: 1, Len: 12<br /> Source Port: 64255<br /> Destination Port: 10240<br /> [Stream index: 0]<br /> [TCP Segment Len: 12]<br /> Sequence number: 1 (relative sequence number)<br /> Sequence number (raw): 3261314629<br /> [Next sequence number: 13 (relative sequence number)]<br /> Acknowledgment number: 1 (relative ack number)<br /> Acknowledgment number (raw): 1175996046<br /> 1000 .... = Header Length: 32 bytes (8)<br /> Flags: 0x018 (PSH, ACK)<br /> Window size value: 6379<br /> [Calculated window size: 6379]<br /> [Window size scaling factor: -1 (unknown)]<br /> Checksum: 0xfe34 [unverified]<br /> [Checksum Status: Unverified]<br /> Urgent pointer: 0<br /> Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - Timestamps: TSval 742069804, TSecr 740812626<br /> [SEQ/ACK analysis]<br /> [Timestamps]<br /> TCP payload (12 bytes)<br /> &lt;/syntaxhighlight&gt;<br /> <br /> === 2:服务端回复ACK===<br /> &lt;syntaxhighlight lang=&quot;lua&quot;&gt;<br /> Transmission Control Protocol, Src Port: 10240, Dst Port: 64255, Seq: 1, Ack: 13, Len: 0<br /> Source Port: 10240<br /> Destination Port: 64255<br /> [Stream index: 0]<br /> [TCP Segment Len: 0]<br /> Sequence number: 1 (relative sequence number)<br /> Sequence number (raw): 1175996046<br /> [Next sequence number: 1 (relative sequence number)]<br /> Acknowledgment number: 13 (relative ack number)<br /> Acknowledgment number (raw): 3261314641<br /> 1000 .... = Header Length: 32 bytes (8)<br /> Flags: 0x010 (ACK)<br /> Window size value: 6379<br /> [Calculated window size: 6379]<br /> [Window size scaling factor: -1 (unknown)]<br /> Checksum: 0xfe28 [unverified]<br /> [Checksum Status: Unverified]<br /> Urgent pointer: 0<br /> Options: (12 bytes), No-Operation (NOP), No-Operation (NOP), Timestamps<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - No-Operation (NOP)<br /> TCP Option - Timestamps: TSval 742069804, TSecr 742069804<br /> [SEQ/ACK analysis]<br /> [This is an ACK to the segment in frame: 13]<br /> [The RTT to ACK the segment was: 0.000040000 seconds]<br /> [Timestamps]<br /> <br /> &lt;/syntaxhighlight&gt;<br /> <br /> = 序列号与ACK=<br /> <br /> 1. (Client) SYN, Seq=3261314628<br /> =. (Server) SYN/ACK, Seq=1175996045, ACK=3261314629=<br /> =. (Client) ACK, Seq=3261314629, ACK=1175996046=<br /> =. (Client) PSH/ACK, Seq=3261314629, ACK=1175996046, Data(12bytes)=<br /> =. (Server) ACK, Seq=1175996046, ACK=3261314641=<br /> =. (Client) FIN/ACK, Seq=3261314641, ACK=1175996046=<br /> =. (Server) ACK, Seq=1175996046, ACK=3261314642=<br /> =. (Server) FIN, ACK, Seq=1175996046, ACK=3261314642=<br /> =. (Client) ACK, Seq=3261314642, ACK=1175996047=<br /> <br /> </div> imported>Riguz