tcp-block

Block Website using TCP Packet Injection on out-of-path environment

How to use

syntax : tcp-block <interface> <pattern> [-r <url>]
    -r <url> : set redirect url to <url> (maxlen : 900)
sample : tcp-block wlan0 "Host: www.president.go.kr"
       : tcp-block wlan0 -a

code

• Need pcap library

• I try to use socket, but it doesn't work.

• I don't know why but when I use the socket function, the sending packet was very slow!

• So, I made tcp-block firewall on pcap library

• -r option should be completed (not yet)

• See packet.rule to know how I made the injecting packet.

reference

• https://github.com/godbestway/connacNFs/blob/462d7e84d3d9d73ba6ce2c9069987e035e23ec10/ori_firewall/raw_socket/raw_socket_ori.c : for raw socket sending