Tribblix: manual page: dlpi

DLPI_SEND(3DLPI) Data Link Provider Interface Library Functions

NAME

dlpi_send - send a data message using DLPI

SYNOPSIS

cc [ flag... ] file... -ldlpi [ library... ]
#include <libdlpi.h>

int dlpi_send(dlpi_handle_t dh, const void *daddrp,
size_t daddrlen, const void *msgbuf, size_t msglen,
const dlpi_sendinfo_t *sendp);

DESCRIPTION

The dlpi_send() function attempts to send the contents of msgbuf over
the DLPI link instance associated with the DLPI handle dh to the
destination address specified by daddrp. The size of msgbuf and
daddrp are provided by the msglen and daddrlen arguments,
respectively. The attempt will fail if dh is not in the DL_IDLE DLPI
state, the address named by daddrp is invalid, daddrlen is larger
than DLPI_PHYSADDR_MAX, or msglen is outside the range reported by
dlpi_info(3DLPI).

If the sendp argument is NULL, data is sent using the bound SAP
associated with dh (see dlpi_bind(3DLPI)) and with default priority.
Otherwise, sendp must point to a dlpi_sendinfo_t structure defined in
<libdlpi.h> as follows:

typedef struct {
uint_t dsi_sap;
dl_priority_t dsi_prio;
} dlpi_sendinfo_t;

The dsi_sap value indicates the SAP to use for the message and the
dsi_prio 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 dlpi_info(3DLPI), and the default priority can be
specified by using the DL_QOS_DONT_CARE constant.

If the handle is in raw mode (see DLPI_RAW in dlpi_open(3DLPI)),
msgbuf must start with the link-layer header (see dlpi(4P)). In raw
mode, the contents of daddrp and sendp are ignored, as they are
already specified by the link-layer header in msgbuf.

If msgbuf is accepted for delivery, no error is returned. However,
because only unacknowledged connectionless service (DL_CLDLS) is
currently supported, a successful return does not guarantee that the
data will be successfully delivered to daddrp.

RETURN VALUES

Upon success, DLPI_SUCCESS is returned. If DL_SYSERR is returned,
errno contains the specific UNIX system error value. Otherwise, a
DLPI error value defined in <sys/dlpi.h> or an error value listed in
the following section is returned.

ERRORS

DLPI_EINHANDLE
Invalid DLPI handle

DLPI_EINVAL
Invalid argument