bpf_dlt.c revision 0a0e9771ca0211c15f3ac4466b661c145feeb9e4
/*
* CDDL HEADER START
*
* 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]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/dlpi.h>
#include <net/if.h>
#include <net/dlt.h>
/*
* This table provides a mapping of the DLPI data link types used in
* Solaris to the BPF data link types. Providing this translation in
* the kernel allows libpcap to be downloaded and used without any
* need for change.
*
* Note that this table is not necessarily sorted.
*/
static uint_t dl_to_dlt[][3] = {
{ DL_CSMACD, DLT_EN10MB, 14 }, /* IEEE 802.3 CSMA/CD */
{ DL_TPB, DLT_NULL, 0 }, /* IEEE 802.4 Token Bus */
{ DL_TPR, DLT_IEEE802, 0 }, /* IEEE 802.5 Token Ring */
{ DL_METRO, DLT_NULL, 0 }, /* IEEE 802.6 Metro Net */
{ DL_ETHER, DLT_EN10MB, 14 }, /* Ethernet Bus */
{ DL_HDLC, DLT_C_HDLC, 0 }, /* Cisco HDLC protocol */
{ DL_CHAR, DLT_NULL, 0 }, /* Character Synchr. proto */
{ DL_CTCA, DLT_NULL, 0 }, /* IBM Channel-to-Channel */
{ DL_FDDI, DLT_FDDI, 24 }, /* Fiber Distributed data */
{ DL_FC, DLT_NULL, 0 }, /* Fibre Channel interface */
{ DL_ATM, DLT_SUNATM, 0 }, /* ATM */
{ DL_IPATM, DLT_ATM_CLIP, 0 }, /* ATM CLIP */
{ DL_X25, DLT_NULL, 0 }, /* X.25 LAPB interface */
{ DL_ISDN, DLT_NULL, 0 }, /* ISDN interface */
{ DL_HIPPI, DLT_HIPPI, 0 }, /* HIPPI interface */
{ DL_100VG, DLT_EN10MB, 14 }, /* 100 Based VG Ethernet */
{ DL_100VGTPR, DLT_IEEE802, 0 }, /* 100 Based VG Token Ring */
{ DL_ETH_CSMA, DLT_EN10MB, 14 }, /* ISO 8802/3 and Ethernet */
{ DL_100BT, DLT_EN10MB, 14 }, /* 100 Base T */
{ DL_IB, DLT_IPOIB, 44 }, /* Solaris IPoIB (infini.) */
{ DL_FRAME, DLT_FRELAY, 0 }, /* Frame Relay LAPF */
{ DL_MPFRAME, DLT_NULL, 0 }, /* Multi-protocol Frame Relay */
{ DL_ASYNC, DLT_NULL, 0 }, /* Character Asynch. Protocol */
{ DL_IPX25, DLT_NULL, 0 }, /* X.25 Classical IP */
{ DL_LOOP, DLT_NULL, 0 }, /* software loopback */
{ DL_IPV4, DLT_RAW, 0 }, /* IPv4 Tunnel Link */
{ DL_IPV6, DLT_RAW, 0 }, /* IPv6 Tunnel Link */
{ SUNW_DL_VNI, DLT_NULL, 0 }, /* Virtual network interface */
{ DL_WIFI, DLT_IEEE802_11, 0 }, /* IEEE 802.11 */
{ DL_IPNET, DLT_IPNET, 24 }, /* Solaris IP Observability */
{ DL_OTHER, DLT_NULL, 0 }, /* Mediums not listed above */
{ 0, 0 }
};
/*
* Given a data link type number used with DLPI on Solaris, return
* the equivalent data link type number for use with BPF.
*/
int
bpf_dl_to_dlt(int dl)
{
int i;
for (i = 0; i < sizeof (dl_to_dlt) / sizeof (dl_to_dlt[0]); i++)
if (dl_to_dlt[i][0] == dl)
return (dl_to_dlt[i][1]);
return (0);
}
/*
* Given a DLPI data link type for Solaris, return the expected header
* size of the link layer.
*/
int
bpf_dl_hdrsize(int dl)
{
int i;
for (i = 0; i < sizeof (dl_to_dlt) / sizeof (dl_to_dlt[0]); i++)
if (dl_to_dlt[i][0] == dl)
return (dl_to_dlt[i][2]);
return (0);
}