CODEWITHSUNDEEP
socketstcp
Muhammad Waqar
Muhammad Waqar

Reputation: 879

TCP reliability in case of interposition of packet

This question is a (sort of) follow-up to Intercepting/Rerouting TCP SYN packets to C++ program in linux.

The question is: If SYN or any other TCP packet is modified (say the source IP address/port is changed) before it is sent to the network (i.e. on the source), what effect will it have on TCP reliability (for example if the packet is lost)?

Upvotes: 2

Views: 85

Answers (1)

Nikolai Fetissov
Nikolai Fetissov

Reputation: 84239

The effect will be exactly the same as for not modified packet - the network stack will timeout and re-try, and eventually give up, and return with ETIMEDOUT from connect(2).

Upvotes: 1

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