1 /* 2 * Fundamental constants relating to Neighbor Discovery Protocol 3 * 4 * Portions of this code are copyright (c) 2022 Cypress Semiconductor Corporation 5 * 6 * Copyright (C) 1999-2017, Broadcom Corporation 7 * 8 * Unless you and Broadcom execute a separate written software license 9 * agreement governing use of this software, this software is licensed to you 10 * under the terms of the GNU General Public License version 2 (the "GPL"), 11 * available at http://www.broadcom.com/licenses/GPLv2.php, with the 12 * following added to such license: 13 * 14 * As a special exception, the copyright holders of this software give you 15 * permission to link this software with independent modules, and to copy and 16 * distribute the resulting executable under terms of your choice, provided that 17 * you also meet, for each linked independent module, the terms and conditions of 18 * the license of that module. An independent module is a module which is not 19 * derived from this software. The special exception does not apply to any 20 * modifications of the software. 21 * 22 * Notwithstanding the above, under no circumstances may you combine this 23 * software in any way with any other Broadcom software provided under a license 24 * other than the GPL, without Broadcom's express prior written consent. 25 * 26 * 27 * <<Broadcom-WL-IPTag/Open:>> 28 * 29 * $Id$ 30 */ 31 32 #ifndef _bcmipv6_h_ 33 #define _bcmipv6_h_ 34 35 #ifndef _TYPEDEFS_H_ 36 #include <typedefs.h> 37 #endif // endif 38 39 /* This marks the start of a packed structure section. */ 40 #include <packed_section_start.h> 41 42 /* Extension headers */ 43 #define IPV6_EXT_HOP 0 44 #define IPV6_EXT_ROUTE 43 45 #define IPV6_EXT_FRAG 44 46 #define IPV6_EXT_DEST 60 47 #define IPV6_EXT_ESEC 50 48 #define IPV6_EXT_AUTH 51 49 50 /* Minimum size (extension header "word" length) */ 51 #define IPV6_EXT_WORD 8 52 53 /* Offsets for most extension headers */ 54 #define IPV6_EXT_NEXTHDR 0 55 #define IPV6_EXT_HDRLEN 1 56 57 /* Constants specific to fragmentation header */ 58 #define IPV6_FRAG_MORE_MASK 0x0001 59 #define IPV6_FRAG_MORE_SHIFT 0 60 #define IPV6_FRAG_OFFS_MASK 0xfff8 61 #define IPV6_FRAG_OFFS_SHIFT 3 62 63 /* For icmpv6 */ 64 #define ICMPV6_HEADER_TYPE 0x3A 65 #define ICMPV6_PKT_TYPE_RA 134 66 #define ICMPV6_PKT_TYPE_NS 135 67 #define ICMPV6_PKT_TYPE_NA 136 68 69 #define ICMPV6_ND_OPT_TYPE_TARGET_MAC 2 70 #define ICMPV6_ND_OPT_TYPE_SRC_MAC 1 71 72 #define ICMPV6_ND_OPT_LEN_LINKADDR 1 73 74 #define ICMPV6_ND_OPT_LEN_LINKADDR 1 75 76 #define IPV6_VERSION 6 77 #define IPV6_HOP_LIMIT 255 78 79 #define IPV6_ADDR_NULL(a) ((a[0] | a[1] | a[2] | a[3] | a[4] | \ 80 a[5] | a[6] | a[7] | a[8] | a[9] | \ 81 a[10] | a[11] | a[12] | a[13] | \ 82 a[14] | a[15]) == 0) 83 84 #define IPV6_ADDR_LOCAL(a) (((a[0] == 0xfe) && (a[1] & 0x80))? TRUE: FALSE) 85 86 /* IPV6 address */ 87 BWL_PRE_PACKED_STRUCT struct ipv6_addr { 88 uint8 addr[16]; 89 } BWL_POST_PACKED_STRUCT; 90 91 /* ICMPV6 Header */ 92 BWL_PRE_PACKED_STRUCT struct icmp6_hdr { 93 uint8 icmp6_type; 94 uint8 icmp6_code; 95 uint16 icmp6_cksum; 96 BWL_PRE_PACKED_STRUCT union { 97 uint32 reserved; 98 BWL_PRE_PACKED_STRUCT struct nd_advt { 99 uint32 reserved1:5, 100 override:1, 101 solicited:1, 102 router:1, 103 reserved2:24; 104 } BWL_POST_PACKED_STRUCT nd_advt; 105 } BWL_POST_PACKED_STRUCT opt; 106 } BWL_POST_PACKED_STRUCT; 107 108 /* Ipv6 Header Format */ 109 BWL_PRE_PACKED_STRUCT struct ipv6_hdr { 110 uint8 priority:4, 111 version:4; 112 uint8 flow_lbl[3]; 113 uint16 payload_len; 114 uint8 nexthdr; 115 uint8 hop_limit; 116 struct ipv6_addr saddr; 117 struct ipv6_addr daddr; 118 } BWL_POST_PACKED_STRUCT; 119 120 /* Neighbor Advertisement/Solicitation Packet Structure */ 121 BWL_PRE_PACKED_STRUCT struct bcm_nd_msg { 122 struct icmp6_hdr icmph; 123 struct ipv6_addr target; 124 } BWL_POST_PACKED_STRUCT; 125 126 /* Neighibor Solicitation/Advertisement Optional Structure */ 127 BWL_PRE_PACKED_STRUCT struct nd_msg_opt { 128 uint8 type; 129 uint8 len; 130 uint8 mac_addr[ETHER_ADDR_LEN]; 131 } BWL_POST_PACKED_STRUCT; 132 133 /* Ipv6 Fragmentation Header */ 134 BWL_PRE_PACKED_STRUCT struct ipv6_frag { 135 uint8 nexthdr; 136 uint8 reserved; 137 uint16 frag_offset; 138 uint32 ident; 139 } BWL_POST_PACKED_STRUCT; 140 141 /* This marks the end of a packed structure section. */ 142 #include <packed_section_end.h> 143 144 static const struct ipv6_addr all_node_ipv6_maddr = { 145 { 0xff, 0x2, 0, 0, 146 0, 0, 0, 0, 147 0, 0, 0, 0, 148 0, 0, 0, 1 149 }}; 150 151 #define IPV6_ISMULTI(a) (a[0] == 0xff) 152 153 #define IPV6_MCAST_TO_ETHER_MCAST(ipv6, ether) \ 154 { \ 155 ether[0] = 0x33; \ 156 ether[1] = 0x33; \ 157 ether[2] = ipv6[12]; \ 158 ether[3] = ipv6[13]; \ 159 ether[4] = ipv6[14]; \ 160 ether[5] = ipv6[15]; \ 161 } 162 163 #endif /* !defined(_bcmipv6_h_) */ 164