NAME
talkd —
remote user communication
server
SYNOPSIS
talkd |
DESCRIPTION
Talkd is the server that notifies a user
that someone else wants to initiate a conversation. It acts as a repository
of invitations, responding to requests by clients wishing to rendezvous to
hold a conversation. In normal operation, a client, the caller, initiates a
rendezvous by sending a CTL_MSG to the server of type LOOK_UP (see
⟨protocols/talkd.h⟩). This causes the
server to search its invitation tables to check if an invitation currently
exists for the caller (to speak to the callee specified in the message). If
the lookup fails, the caller then sends an ANNOUNCE message causing the
server to broadcast an announcement on the callee's login ports requesting
contact. When the callee responds, the local server uses the recorded
invitation to respond with the appropriate rendezvous address and the caller
and callee client programs establish a stream connection through which the
conversation takes place.
SEE ALSO
HISTORY
The talkd command appeared in
4.3BSD.