NAME

t_snddis − send user-initiated disconnect request

SYNOPSIS

#include <tiuser.h>

int t_snddis (int fd, struct t_call ∗call):

DESCRIPTION

This function is used to initiate an abortive release on an already established connection or to reject a connect request.  fd 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 netbuf addr;
struct netbuf opt;
struct netbuf udata;
int sequence;

netbuf is described in intro(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 want 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 or t_getinfo.  If the len field of udata is zero, no data will be sent to the remote user. 

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

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

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

TBADDATA The amount of user data specified was not within the bounds supported by the transport provider as returned in the discon field of the info argument of t_open or t_getinfo.  The transport provider’s outgoing queue will be flushed, so data may be lost. 

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. 

TSYSERR A system error has occurred during execution of this function. 

SEE ALSO

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

DIAGNOSTICS

t_snddis returns 0 on success and −1 on failure and t_errno is set to indicate the error. 

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