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All Rights Reserved. .\" Portions Copyright (c) 1998, Sun Microsystems, Inc. All Rights Reserved. .\" .TH T_SNDDIS 3NSL "May 7, 1998" .SH NAME t_snddis \- send user-initiated disconnection request .SH SYNOPSIS .LP .nf #include \fBint\fR \fBt_snddis\fR(\fBint\fR \fIfd\fR, \fBconst struct t_call *\fR\fIcall\fR); .fi .SH DESCRIPTION .sp .LP This routine is part of the \fBXTI\fR interfaces which evolved from the \fBTLI\fR interfaces. \fBXTI\fR represents the future evolution of these interfaces. However, \fBTLI\fR interfaces are supported for compatibility. When using a \fBTLI\fR routine that has the same name as an \fBXTI\fR routine, the \fBtiuser.h\fR header file must be used. Refer to the TLI COMPATIBILITY section for a description of differences between the two interfaces. .sp .LP This function is used to initiate an abortive release on an already established connection, or to reject a connection request. The argument \fIfd\fR identifies the local transport endpoint of the connection, and \fIcall\fR specifies information associated with the abortive release. The argument \fIcall\fR points to a \fBt_call\fR structure which contains the following members: .sp .in +2 .nf struct netbuf addr; struct netbuf opt; struct netbuf udata; int sequence; .fi .in -2 .sp .LP The values in \fIcall\fR have different semantics, depending on the context of the call to \fBt_snddis()\fR. When rejecting a connection request, \fIcall\fR must be non-null and contain a valid value of \fIsequence\fR to uniquely identify the rejected connection indication to the transport provider. The \fIsequence\fR field is only meaningful if the transport connection is in the \fBT_INCON\fR state. The \fIaddr\fR and \fIopt\fR fields of \fIcall\fR are ignored. In all other cases, \fIcall\fR need only be used when data is being sent with the disconnection request. The \fIaddr\fR, \fIopt\fR and \fIsequence\fR fields of the \fBt_call\fR structure are ignored. If the user does not wish to send data to the remote user, the value of \fIcall\fR may be a null pointer. .sp .LP The \fIudata\fR structure 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 \fIdiscon\fR field, of the \fIinfo\fR argument of \fBt_open\fR(3NSL) or \fBt_getinfo\fR(3NSL). If the \fIlen\fR field of \fIudata\fR is zero, no data will be sent to the remote user. .SH RETURN VALUES .sp .LP Upon successful completion, a value of \fB0\fR is returned. Otherwise, a value of -1 is returned and \fBt_errno\fR is set to indicate an error. .SH VALID STATES .sp .LP \fBT_DATAXFER\fR, \fBT_OUTCON\fR, \fBT_OUTREL\fR, \fBT_INREL\fR, \fBT_INCON(ocnt > 0)\fR. .SH ERRORS .sp .LP On failure, \fBt_errno\fR is set to one of the following: .sp .ne 2 .na \fB\fBTBADF\fR\fR .ad .RS 15n The specified file descriptor does not refer to a transport endpoint. .RE .sp .ne 2 .na \fB\fBTBADDATA\fR\fR .ad .RS 15n The amount of user data specified was not within the bounds allowed by the transport provider. .RE .sp .ne 2 .na \fB\fBTBADSEQ\fR\fR .ad .RS 15n An invalid sequence number was specified, or a null \fIcall\fR pointer was specified, when rejecting a connection request. .RE .sp .ne 2 .na \fB\fBTLOOK\fR\fR .ad .RS 15n An asynchronous event, which requires attention, has occurred. .RE .sp .ne 2 .na \fB\fBTNOTSUPPORT\fR\fR .ad .RS 15n This function is not supported by the underlying transport provider. .RE .sp .ne 2 .na \fB\fBTOUTSTATE\fR\fR .ad .RS 15n The communications endpoint referenced by \fIfd\fR is not in one of the states in which a call to this function is valid. .RE .sp .ne 2 .na \fB\fBTPROTO\fR\fR .ad .RS 15n This error indicates that a communication problem has been detected between XTI and the transport provider for which there is no other suitable \fBX\fRTI error \fB(t_errno)\fR. .RE .sp .ne 2 .na \fB\fBTSYSERR\fR\fR .ad .RS 15n A system error has occurred during execution of this function. .RE .SH TLI COMPATIBILITY .sp .LP The \fBXTI\fR and \fBTLI\fR interface definitions have common names but use different header files. This, and other semantic differences between the two interfaces are described in the subsections below. .SS "Interface Header" .sp .LP The \fBXTI\fR interfaces use the header file, \fBxti.h\fR. \fBTLI\fR interfaces should \fInot\fR use this header. They should use the header: .br .in +2 \fB#include \fR .in -2 .SS "Error Description Values" .sp .LP The \fBt_errno\fR value \fBTPROTO\fR can be set by the \fBXTI\fR interface but not by the \fBTLI\fR interface. .SS "Option Buffers" .sp .LP The format of the options in an \fBopt\fR buffer is dictated by the transport provider. Unlike the \fBXTI\fR interface, the \fBTLI\fR interface does not fix the buffer format. .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .sp .TS box; c | c l | l . ATTRIBUTE TYPE ATTRIBUTE VALUE _ MT Level Safe .TE .SH SEE ALSO .sp .LP .BR t_connect (3NSL), .BR t_getinfo (3NSL), .BR t_listen (3NSL), .BR t_open (3NSL), .BR t_snd (3NSL), .BR attributes (7) .SH WARNINGS .sp .LP \fBt_snddis()\fR is an abortive disconnection. Therefore a \fBt_snddis()\fR issued on a connection endpoint may cause data previously sent by means of \fBt_snd\fR(3NSL), or data not yet received, to be lost, even if an error is returned.