#include <tiuser.h>
int t_listen(fd, call) int fd; struct t_call *call;
t_listen() listens for a connect request from a calling transport user. fd identifies the local transport endpoint where connect indications arrive, and on return, call contains information describing the connect indication. call points to a t_call() structure which contains the following members:
struct netbuf addr; struct netbuf opt; struct netbuf udata; int sequence;
The maxlen, len, and buf members of the netbuf structure are described in t_accept.3n In call, addr returns the protocol address of the calling transport user, opt returns protocol-specific parameters associated with the connect request, udata returns any user data sent by the caller on the connect request, and sequence is a number that uniquely identifies the returned connect indication. The value of sequence enables the user to listen for multiple connect indications before responding to any of them.
Since this function returns values for the addr, opt, and udata fields of call, the maxlen field of each must be set before issuing the t_listen() to indicate the maximum size of the buffer for each.
By default, t_listen() executes in synchronous mode and waits for a connect indication to arrive before returning to the user. However, if T_NDELAY is set (using t_open.3n or fcntl()), t_listen() executes asynchronously, reducing to a poll.2 for existing connect indications. If none are available, it returns -1 and sets t_errno to TNODATA.
t_listen() returns:
[a manual with the abbreviation NETP]
Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97