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c++csocketstcpraw-sockets

Connect function in raw socket?

I am trying to initiate a TCP Three-Way-Handshake in C. However, it occurred to me that connect may already be establishing such a connection or in some way interfering. Does connect automatically establish a TCP connection whenever the socket it's called on has the IPPROTO_TCP option set?

Solution

  • Yes, IPPROTO_TCP creates TCP socket. To use raw socket, you need to pass SOCK_RAW as second argument to the socket function.