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 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 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 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 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