Hello,
I've noticed that there's a difference in behavior between nc(1) and GNU
netcat when they talk to some daemon via TCP.
The commands in the following example are basically the same:
GNU netcat:
netcat host 1234 < infile
nc(1):
nc host 1234 < infile
nc(1) sends a FIN segment after all data has been read from stdin:
shutdown(nfd, SHUT_WR) in netcat.c causes TCP to enter FIN-WAIT-1 state.
GNU netcat doesn't do this. I've noticed that some daemons behave
differently because of this, i.e., they won't return any data although
they are still allowed to send data.
I think both variants are allowed in RFC 793. Would it make sense to add
a further option to nc(1) which allows to toggle between both variants?
Regards
Andreas
