te
Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
dlpi_info - get DLPI information

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

int dlpi_info(dlpi_handle_t dh, dlpi_info_t *infop,
 uint_t opt);

The dlpi_info() function provides DLPI information about the open DLPI link instance associated with DLPI handle dh. DLPI information can be retrieved in any state of dh, but some of the information might not be available if dh is in the DL_UNBOUND DLPI state. The DLPI information received is copied into infop, which must point to a dlpi_info_t allocated by the caller. The opt argument is reserved for future use and must be set to 0.

The dlpi_info_t is a structure defined in <libdlpi.h> as follows:

typedef struct {
 uint_t di_opts;
 uint_t di_max_sdu;
 uint_t di_min_sdu;
 uint_t di_state;
 uchar_t di_mactype;
 char di_linkname[DLPI_LINKNAME_MAX];
 uchar_t di_physaddr[DLPI_PHYSADDR_MAX];
 uchar_t di_physaddrlen;
 uchar_t di_bcastaddr[DLPI_PHYSADDR_MAX];
 uchar_t di_bcastaddrlen;
 uint_t di_sap;
 int di_timeout;
 dl_qos_cl_sel1_t di_qos_sel;
 dl_qos_cl_range1_t di_qos_range;
} dlpi_info_t;

di_opts di_max_sdu di_min_sdu di_state di_mactype di_linkname di_physaddr di_physaddrlen di_bcastaddr di_bcastaddrlen di_sap di_timeout di_qos_sel di_qos_range

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.

DLPI_EBADMSG DLPI_EINHANDLE DLPI_EINVAL DLPI_EMODENOTSUP DLPI_ETIMEDOUT DLPI_EVERNOTSUP DLPI_FAILURE

Example 1 Get link-layer broadcast address

The following example shows how dlpi_info() can be used.

#include <libdlpi.h>

uchar_t *
get_bcastaddr(const char *linkname, uchar_t *baddrlenp)
{
 dlpi_handle_t dh;
 dlpi_info_t dlinfo;
 uchar_t *baddr;

 if (dlpi_open(linkname, &dh, 0) != DLPI_SUCCESS)
 return (NULL);

 if (dlpi_info(dh, &dlinfo, 0) != DLPI_SUCCESS) {
 dlpi_close(dh);
 return (NULL);
 }
 dlpi_close(dh);

 *baddrlenp = dlinfo.di_bcastaddrlen;
 if ((baddr = malloc(*baddrlenp)) == NULL)
 return (NULL);

 return (memcpy(baddr, dlinfo.di_bcastaddr, *baddrlenp));
}

See attributes(5) for description of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

Interface Stability Committed

MT-Level Safe

dlpi_bind(3DLPI), libdlpi(3LIB), attributes(5)