1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Fundamental constants relating to Neighbor Discovery Protocol 4 * 5 * Copyright (C) 1999-2019, Broadcom. 6 * 7 * Unless you and Broadcom execute a separate written software license 8 * agreement governing use of this software, this software is licensed to you 9 * under the terms of the GNU General Public License version 2 (the "GPL"), 10 * available at http://www.broadcom.com/licenses/GPLv2.php, with the 11 * following added to such license: 12 * 13 * As a special exception, the copyright holders of this software give you 14 * permission to link this software with independent modules, and to copy and 15 * distribute the resulting executable under terms of your choice, provided that 16 * you also meet, for each linked independent module, the terms and conditions of 17 * the license of that module. An independent module is a module which is not 18 * derived from this software. The special exception does not apply to any 19 * modifications of the software. 20 * 21 * Notwithstanding the above, under no circumstances may you combine this 22 * software in any way with any other Broadcom software provided under a license 23 * other than the GPL, without Broadcom's express prior written consent. 24 * 25 * 26 * <<Broadcom-WL-IPTag/Open:>> 27 * 28 * $Id: bcmipv6.h 700076 2017-05-17 14:42:22Z $ 29 */ 30 31 #ifndef _bcmipv6_h_ 32 #define _bcmipv6_h_ 33 34 #ifndef _TYPEDEFS_H_ 35 #include <typedefs.h> 36 #endif // endif 37 38 /* This marks the start of a packed structure section. */ 39 #include <packed_section_start.h> 40 41 /* Extension headers */ 42 #define IPV6_EXT_HOP 0 43 #define IPV6_EXT_ROUTE 43 44 #define IPV6_EXT_FRAG 44 45 #define IPV6_EXT_DEST 60 46 #define IPV6_EXT_ESEC 50 47 #define IPV6_EXT_AUTH 51 48 49 /* Minimum size (extension header "word" length) */ 50 #define IPV6_EXT_WORD 8 51 52 /* Offsets for most extension headers */ 53 #define IPV6_EXT_NEXTHDR 0 54 #define IPV6_EXT_HDRLEN 1 55 56 /* Constants specific to fragmentation header */ 57 #define IPV6_FRAG_MORE_MASK 0x0001 58 #define IPV6_FRAG_MORE_SHIFT 0 59 #define IPV6_FRAG_OFFS_MASK 0xfff8 60 #define IPV6_FRAG_OFFS_SHIFT 3 61 62 /* For icmpv6 */ 63 #define ICMPV6_HEADER_TYPE 0x3A 64 #define ICMPV6_PKT_TYPE_RA 134 65 #define ICMPV6_PKT_TYPE_NS 135 66 #define ICMPV6_PKT_TYPE_NA 136 67 68 #define ICMPV6_ND_OPT_TYPE_TARGET_MAC 2 69 #define ICMPV6_ND_OPT_TYPE_SRC_MAC 1 70 71 #define ICMPV6_ND_OPT_LEN_LINKADDR 1 72 73 #define ICMPV6_ND_OPT_LEN_LINKADDR 1 74 75 #define IPV6_VERSION 6 76 #define IPV6_HOP_LIMIT 255 77 78 #define IPV6_ADDR_NULL(a) ((a[0] | a[1] | a[2] | a[3] | a[4] | \ 79 a[5] | a[6] | a[7] | a[8] | a[9] | \ 80 a[10] | a[11] | a[12] | a[13] | \ 81 a[14] | a[15]) == 0) 82 83 #define IPV6_ADDR_LOCAL(a) (((a[0] == 0xfe) && (a[1] & 0x80))? TRUE: FALSE) 84 85 /* IPV6 address */ 86 BWL_PRE_PACKED_STRUCT struct ipv6_addr { 87 uint8 addr[16]; 88 } BWL_POST_PACKED_STRUCT; 89 90 /* ICMPV6 Header */ 91 BWL_PRE_PACKED_STRUCT struct icmp6_hdr { 92 uint8 icmp6_type; 93 uint8 icmp6_code; 94 uint16 icmp6_cksum; 95 BWL_PRE_PACKED_STRUCT union { 96 uint32 reserved; 97 BWL_PRE_PACKED_STRUCT struct nd_advt { 98 uint32 reserved1:5, 99 override:1, 100 solicited:1, 101 router:1, 102 reserved2:24; 103 } BWL_POST_PACKED_STRUCT nd_advt; 104 } BWL_POST_PACKED_STRUCT opt; 105 } BWL_POST_PACKED_STRUCT; 106 107 /* Ipv6 Header Format */ 108 BWL_PRE_PACKED_STRUCT struct ipv6_hdr { 109 uint8 priority:4, 110 version:4; 111 uint8 flow_lbl[3]; 112 uint16 payload_len; 113 uint8 nexthdr; 114 uint8 hop_limit; 115 struct ipv6_addr saddr; 116 struct ipv6_addr daddr; 117 } BWL_POST_PACKED_STRUCT; 118 119 /* Neighbor Advertisement/Solicitation Packet Structure */ 120 BWL_PRE_PACKED_STRUCT struct bcm_nd_msg { 121 struct icmp6_hdr icmph; 122 struct ipv6_addr target; 123 } BWL_POST_PACKED_STRUCT; 124 125 /* Neighibor Solicitation/Advertisement Optional Structure */ 126 BWL_PRE_PACKED_STRUCT struct nd_msg_opt { 127 uint8 type; 128 uint8 len; 129 uint8 mac_addr[ETHER_ADDR_LEN]; 130 } BWL_POST_PACKED_STRUCT; 131 132 /* Ipv6 Fragmentation Header */ 133 BWL_PRE_PACKED_STRUCT struct ipv6_frag { 134 uint8 nexthdr; 135 uint8 reserved; 136 uint16 frag_offset; 137 uint32 ident; 138 } BWL_POST_PACKED_STRUCT; 139 140 /* This marks the end of a packed structure section. */ 141 #include <packed_section_end.h> 142 143 static const struct ipv6_addr all_node_ipv6_maddr = { 144 { 0xff, 0x2, 0, 0, 145 0, 0, 0, 0, 146 0, 0, 0, 0, 147 0, 0, 0, 1 148 }}; 149 150 #define IPV6_ISMULTI(a) (a[0] == 0xff) 151 152 #define IPV6_MCAST_TO_ETHER_MCAST(ipv6, ether) \ 153 { \ 154 ether[0] = 0x33; \ 155 ether[1] = 0x33; \ 156 ether[2] = ipv6[12]; \ 157 ether[3] = ipv6[13]; \ 158 ether[4] = ipv6[14]; \ 159 ether[5] = ipv6[15]; \ 160 } 161 162 #endif /* !defined(_bcmipv6_h_) */ 163