PCAP-over-IP client in stenotype

[erik4711]

Feature request: Add a PCAP-over-IP client to stenotype, so that packets can be read from a TCP socket as an alternative to sniffing an interface.

PCAP-over-IP can be used to live-stream captured packets from a remote sniffer to Stenographer, but the most useful use-case is probably in order to read decrypted HTTPS traffic from a TLS proxy without having to replay it to a dummy network interface. There are several downsides of replaying packets to an interface, such as requiring root privs and risk of packet loss, so reading them from a TCP socket instead is preferable.

It would be nice if stenotype would support the same TCP socket interface syntax as Wireshark/tshark.

stenotype --iface=TCP@192.168.1.2:57012

Another option would be to add a custom option specifically for PCAP-over-IP:

stenotype --pcapoverip-connect=192.168.1.2:57012

Or to start a listening socket that awaits packet sources to connect using PCAP-over-IP

stenotype --pcapoverip-listen=57012