1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/types.h>
28 #include <sys/dlpi.h>
29 #include <net/if.h>
30 #include <net/dlt.h>
31
32 /*
33 * This table provides a mapping of the DLPI data link types used in
34 * Solaris to the BPF data link types. Providing this translation in
35 * the kernel allows libpcap to be downloaded and used without any
36 * need for change.
37 *
38 * Note that this table is not necessarily sorted.
39 */
40 static uint_t dl_to_dlt[][3] = {
41 { DL_CSMACD, DLT_EN10MB, 14 }, /* IEEE 802.3 CSMA/CD */
42 { DL_TPB, DLT_NULL, 0 }, /* IEEE 802.4 Token Bus */
43 { DL_TPR, DLT_IEEE802, 0 }, /* IEEE 802.5 Token Ring */
44 { DL_METRO, DLT_NULL, 0 }, /* IEEE 802.6 Metro Net */
45 { DL_ETHER, DLT_EN10MB, 14 }, /* Ethernet Bus */
46 { DL_HDLC, DLT_C_HDLC, 0 }, /* Cisco HDLC protocol */
47 { DL_CHAR, DLT_NULL, 0 }, /* Character Synchr. proto */
48 { DL_CTCA, DLT_NULL, 0 }, /* IBM Channel-to-Channel */
49 { DL_FDDI, DLT_FDDI, 24 }, /* Fiber Distributed data */
50 { DL_FC, DLT_NULL, 0 }, /* Fibre Channel interface */
51 { DL_ATM, DLT_SUNATM, 0 }, /* ATM */
52 { DL_IPATM, DLT_ATM_CLIP, 0 }, /* ATM CLIP */
53 { DL_X25, DLT_NULL, 0 }, /* X.25 LAPB interface */
54 { DL_ISDN, DLT_NULL, 0 }, /* ISDN interface */
55 { DL_HIPPI, DLT_HIPPI, 0 }, /* HIPPI interface */
56 { DL_100VG, DLT_EN10MB, 14 }, /* 100 Based VG Ethernet */
57 { DL_100VGTPR, DLT_IEEE802, 0 }, /* 100 Based VG Token Ring */
58 { DL_ETH_CSMA, DLT_EN10MB, 14 }, /* ISO 8802/3 and Ethernet */
59 { DL_100BT, DLT_EN10MB, 14 }, /* 100 Base T */
60 { DL_IB, DLT_IPOIB, 44 }, /* Solaris IPoIB (infini.) */
61 { DL_FRAME, DLT_FRELAY, 0 }, /* Frame Relay LAPF */
62 { DL_MPFRAME, DLT_NULL, 0 }, /* Multi-protocol Frame Relay */
63 { DL_ASYNC, DLT_NULL, 0 }, /* Character Asynch. Protocol */
64 { DL_IPX25, DLT_NULL, 0 }, /* X.25 Classical IP */
65 { DL_LOOP, DLT_NULL, 0 }, /* software loopback */
66 { DL_IPV4, DLT_RAW, 0 }, /* IPv4 Tunnel Link */
67 { DL_IPV6, DLT_RAW, 0 }, /* IPv6 Tunnel Link */
68 { SUNW_DL_VNI, DLT_NULL, 0 }, /* Virtual network interface */
69 { DL_WIFI, DLT_IEEE802_11, 0 }, /* IEEE 802.11 */
70 { DL_IPNET, DLT_IPNET, 24 }, /* Solaris IP Observability */
71 { DL_OTHER, DLT_NULL, 0 }, /* Mediums not listed above */
72 { 0, 0 }
73 };
74
75 /*
76 * Given a data link type number used with DLPI on Solaris, return
77 * the equivalent data link type number for use with BPF.
78 */
79 int
bpf_dl_to_dlt(int dl)80 bpf_dl_to_dlt(int dl)
81 {
82 int i;
83
84 for (i = 0; i < sizeof (dl_to_dlt) / sizeof (dl_to_dlt[0]); i++)
85 if (dl_to_dlt[i][0] == dl)
86 return (dl_to_dlt[i][1]);
87 return (0);
88 }
89
90 /*
91 * Given a DLPI data link type for Solaris, return the expected header
92 * size of the link layer.
93 */
94 int
bpf_dl_hdrsize(int dl)95 bpf_dl_hdrsize(int dl)
96 {
97 int i;
98
99 for (i = 0; i < sizeof (dl_to_dlt) / sizeof (dl_to_dlt[0]); i++)
100 if (dl_to_dlt[i][0] == dl)
101 return (dl_to_dlt[i][2]);
102 return (0);
103 }
104