NAME

t_snddis − send user-initiated disconnect request

SYNOPSIS

cc [ flag ... ] file ... −lnsl [ library ... ]

#include <tiuser.h>

int t_snddis(int fildes, struct t_call ∗call);

MT-LEVEL

MT-Safe

DESCRIPTION

This function is used to initiate an abortive release on an already established connection or to reject a connect request.  fildes identifies the local transport endpoint of the connection, and call specifies information associated with the abortive release.  call points to a t_call structure that contains the following members:

struct netbufaddr;
struct netbufopt;
struct netbufudata;
intsequence;

netbuf is described in t_connect(3N).  The values in call have different semantics, depending on the context of the call to t_snddis().  When rejecting a connect request, call must be non-NULL and contain a valid value of sequence to identify uniquely the rejected connect indication to the transport provider.  The addr and opt fields of call are ignored.  In all other cases, call need only be used when data is being sent with the disconnect request.  The addr, opt, and sequence fields of the t_call structure are ignored.  If the user does not wish to send data to the remote user, the value of call may be NULL. 

udata specifies the user data to be sent to the remote user.  The amount of user data must not exceed the limits supported by the transport provider as returned in the discon field of the info argument of t_open(3N) or t_getinfo(3N).  If the len field of udata is zero, no data will be sent to the remote user. 

RETURN VALUES

t_snddis() returns 0 on success.  On failure t_snddis() returns −1, t_errno is set to indicate the error, and possibly errno is set. 

ERRORS

On failure, t_errno will be set to one of the following:

TBADDATA The amount of user data specified was not within the bounds allowed by the transport provider.  The transport provider’s outgoing queue will be flushed, so data may be lost. 

TBADF The specified file descriptor does not refer to a transport endpoint. 

TBADSEQ An invalid sequence number was specified, or a NULL call structure was specified when rejecting a connect request.  The transport provider’s outgoing queue will be flushed, so data may be lost. 

TLOOK An asynchronous event has occurred on this transport endpoint and requires immediate attention. 

TNOTSUPPORT This function is not supported by the underlying transport provider. 

TOUTSTATE The function was issued in the wrong sequence.  The transport provider’s outgoing queue may be flushed, so data may be lost. 

TSYSERR A system error has occurred during execution of this function, errno will be set to the specific error. 

SEE ALSO

t_connect(3N), t_getinfo(3N), t_listen(3N), t_open(3N)

Network Interfaces Programmer’s Guide

NOTES

This interface is safe in multithreaded applications. 

SunOS 5.4  —  Last change: 27 Jan 1994