'\" te
.\"  Copyright (c) 2008, Sun Microsystems, Inc.  All Rights Reserved
.TH dlpi_send 3DLPI "15 Jul 2008" "SunOS 5.11" "Data Link Provider Interface Library Functions"
.SH NAME
dlpi_send \- send a data message using DLPI
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR... ] \fIfile\fR... \fB-ldlpi\fR [ \fIlibrary\fR... ]
#include <libdlpi.h>

\fBint\fR \fBdlpi_send\fR(\fBdlpi_handle_t\fR \fIdh\fR, \fBconst void *\fR\fIdaddrp\fR,
     \fBsize_t\fR \fIdaddrlen\fR, \fBconst void *\fR\fImsgbuf\fR, \fBsize_t\fR \fImsglen\fR,
     \fBconst dlpi_sendinfo_t *\fR\fIsendp\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBdlpi_send()\fR function attempts to send the contents of \fImsgbuf\fR over the \fBDLPI\fR link instance associated with the \fBDLPI\fR handle \fIdh\fR to the destination address specified by \fIdaddrp\fR. The size of \fImsgbuf\fR and  \fIdaddrp\fR are provided by the \fImsglen\fR and \fIdaddrlen\fR arguments, respectively. The attempt will fail if \fIdh\fR is not in the \fBDL_IDLE\fR \fBDLPI\fR state, the address named by \fIdaddrp\fR is invalid, \fIdaddrlen\fR is larger than \fBDLPI_PHYSADDR_MAX\fR, or \fImsglen\fR is outside the range reported by \fBdlpi_info\fR(3DLPI).
.sp
.LP
If the \fBsendp\fR argument is \fINULL\fR, data is sent using the bound SAP associated with \fIdh\fR (see \fBdlpi_bind\fR(3DLPI)) and with default priority.  Otherwise, \fIsendp\fR must point to a \fBdlpi_sendinfo_t\fR structure defined in \fB<libdlpi.h>\fR as follows:
.sp
.in +2
.nf
typedef struct {
        uint_t          dsi_sap;
        dl_priority_t   dsi_prio;
} dlpi_sendinfo_t;
.fi
.in -2

.sp
.LP
The \fIdsi_sap\fR value indicates the SAP to use for the message and the \fIdsi_prio\fR argument indicates the priority.  The priority range spans from 0 to 100, with 0 being the highest priority.  If one wishes to only alter the SAP or priority (but not both), the current SAP can be retrieved using \fBdlpi_info\fR(3DLPI), and the default priority can be specified by using the \fBDL_QOS_DONT_CARE\fR constant.
.sp
.LP
If the handle is in raw mode (see \fBDLPI_RAW\fR in \fBdlpi_open\fR(3DLPI)), \fImsgbuf\fR must start with the link-layer header (see \fBdlpi\fR(7P)). In raw mode, the contents of \fIdaddrp\fR and \fIsendp\fR are ignored, as they are already specified by the link-layer header in \fImsgbuf\fR.
.sp
.LP
If \fImsgbuf\fR is accepted for delivery, no error is returned. However, because only unacknowledged connectionless service (\fBDL_CLDLS\fR) is currently supported, a successful return does not guarantee that the data will be successfully delivered to \fIdaddrp\fR.
.SH RETURN VALUES
.sp
.LP
Upon success, \fBDLPI_SUCCESS\fR is returned. If \fBDL_SYSERR\fR is returned, \fBerrno\fR contains the specific UNIX system error value. Otherwise, a \fBDLPI\fR error value defined in \fB<sys/dlpi.h>\fR or an error value listed in the following section is returned.
.SH ERRORS
.sp
.ne 2
.mk
.na
\fB\fBDLPI_EINHANDLE\fR\fR
.ad
.RS 18n
.rt  
Invalid \fBDLPI\fR handle
.RE

.sp
.ne 2
.mk
.na
\fB\fBDLPI_EINVAL\fR\fR
.ad
.RS 18n
.rt  
Invalid argument
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for description of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelSafe
.TE

.SH SEE ALSO
.sp
.LP
\fBdlpi_bind\fR(3DLPI), \fBdlpi_info\fR(3DLPI), \fBdlpi_open\fR(3DLPI), \fBlibdlpi\fR(3LIB), \fBattributes\fR(5), \fBdlpi\fR(7P)