TCP包序号问题

lz_fine

本人在写一个使用TCP通讯的程序时，遇到这样一个现象：
先后收到服务器发过来的两帧TCP数据，内容长度都不一样，但32位序号是一样的，就是TCP报头第32位到第64位，共4个字节，32位确认序号也相同。
请问这样的情况正常吗？什么情况下会发生这种情况？如果出现了，应该怎么处理最合适？
先谢谢大家了

caijimin

正常， 看 《TCP/IP详解 卷1》
21.11 Repacketization
When TCP times out and retransmits, it does not have to retransmit the identical segment again. Instead, TCP is allowed to perform repacketization, sending a bigger segment, which can increase performance. (Naturally, this bigger segment cannot exceed the MSS announced by the other receiver.) This is allowed in the protocol because TCP identifies the data being sent and acknowledged by its byte number, not its segment number.

一般来说，你可以以后收到的为准

lz_fine

原帖由 caijimin 于 2009-7-27 12:15 发表
正常， 看 《TCP/IP详解 卷1》
21.11 Repacketization
When TCP times out and retransmits, it does not have to retransmit the identical segment again. Instead, TCP is allowed to perform repacketiza ...

牛人啊，佩服，多谢了