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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * DL_6TO4 MAC Type plugin for the Nemo mac module
28 */
29
30 #include <sys/modctl.h>
31 #include <sys/dlpi.h>
32 #include <inet/ip.h>
33 #include <sys/mac.h>
34 #include <sys/mac_6to4.h>
35 #include <sys/mac_ipv4_impl.h>
36
37 static struct modlmisc mac_6to4_modlmisc = {
38 &mod_miscops,
39 "6to4 tunneling MAC plugin"
40 };
41
42 static struct modlinkage mac_6to4_modlinkage = {
43 MODREV_1,
44 &mac_6to4_modlmisc,
45 NULL
46 };
47
48 static mactype_ops_t mac_6to4_type_ops;
49
50 int
_init(void)51 _init(void)
52 {
53 mactype_register_t *mtrp;
54 int err;
55
56 if ((mtrp = mactype_alloc(MACTYPE_VERSION)) == NULL)
57 return (ENOTSUP);
58 mtrp->mtr_ident = MAC_PLUGIN_IDENT_6TO4;
59 mtrp->mtr_ops = &mac_6to4_type_ops;
60 mtrp->mtr_mactype = DL_6TO4;
61 mtrp->mtr_nativetype = DL_6TO4;
62 mtrp->mtr_addrlen = sizeof (ipaddr_t);
63 if ((err = mactype_register(mtrp)) == 0) {
64 if ((err = mod_install(&mac_6to4_modlinkage)) != 0)
65 (void) mactype_unregister(MAC_PLUGIN_IDENT_6TO4);
66 }
67 mactype_free(mtrp);
68 return (err);
69 }
70
71 int
_fini(void)72 _fini(void)
73 {
74 int err;
75 if ((err = mactype_unregister(MAC_PLUGIN_IDENT_6TO4)) != 0)
76 return (err);
77 return (mod_remove(&mac_6to4_modlinkage));
78 }
79
80 int
_info(struct modinfo * modinfop)81 _info(struct modinfo *modinfop)
82 {
83 return (mod_info(&mac_6to4_modlinkage, modinfop));
84 }
85
86 /*
87 * MAC Type plugin operations. Note that because 6to4 is a form of
88 * tunneling over IPv4, this plugin is able to steal most of its operations
89 * from the IPv4 plugin.
90 */
91
92 /*
93 * Check the legality of a 6to4 tunnel SAP value. The only acceptable
94 * values are IPPROTO_IPV6 (IPv6 in IPv4 tunneling) and 0 (for snoop).
95 */
96 /* ARGSUSED */
97 boolean_t
mac_6to4_sap_verify(uint32_t sap,uint32_t * bind_sap,void * pdata)98 mac_6to4_sap_verify(uint32_t sap, uint32_t *bind_sap, void *pdata)
99 {
100 if (sap == IPPROTO_IPV6 || sap == 0) {
101 if (bind_sap != NULL)
102 *bind_sap = sap;
103 return (B_TRUE);
104 }
105 return (B_FALSE);
106 }
107
108 static mactype_ops_t mac_6to4_type_ops = {
109 MTOPS_PDATA_VERIFY,
110 mac_ipv4_unicst_verify,
111 mac_ipv4_multicst_verify,
112 mac_6to4_sap_verify,
113 mac_ipv4_header,
114 mac_ipv4_header_info,
115 mac_ipv4_pdata_verify,
116 NULL,
117 NULL,
118 NULL
119 };
120