After a connection has been established with the $CONNECT() function dcc RAW is used to talk to that connection. $CONNECT(HOST PORT) returns the (fd) of the connection which is then used by dcc RAW. E.g:
ALIAS socktest ECHO $connect(host 7)
Which will echo the file descriptor.
Then send messages to it with:
DCC RAW fd host message
These will be echoed back at you by the remote host. Incoming messages can be intercepted with ON DCC_RAW.
See Also: on/dcc_raw alias/functions