1 /* 2 * Copyright (C) 1999-2012, Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 * 16 * Fundamental constants relating to IP Protocol 17 * 18 * $Id: bcmip.h 290206 2011-10-17 19:13:51Z $ 19 */ 20 21 22 #ifndef _bcmip_h_ 23 #define _bcmip_h_ 24 25 #ifndef _TYPEDEFS_H_ 26 #include <typedefs.h> 27 #endif 28 29 30 #include <packed_section_start.h> 31 32 33 34 #define IP_VER_OFFSET 0x0 35 #define IP_VER_MASK 0xf0 36 #define IP_VER_SHIFT 4 37 #define IP_VER_4 4 38 #define IP_VER_6 6 39 40 #define IP_VER(ip_body) \ 41 ((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT) 42 43 #define IP_PROT_ICMP 0x1 44 #define IP_PROT_IGMP 0x2 45 #define IP_PROT_TCP 0x6 46 #define IP_PROT_UDP 0x11 47 #define IP_PROT_ICMP6 0x3a 48 49 50 #define IPV4_VER_HL_OFFSET 0 51 #define IPV4_TOS_OFFSET 1 52 #define IPV4_PKTLEN_OFFSET 2 53 #define IPV4_PKTFLAG_OFFSET 6 54 #define IPV4_PROT_OFFSET 9 55 #define IPV4_CHKSUM_OFFSET 10 56 #define IPV4_SRC_IP_OFFSET 12 57 #define IPV4_DEST_IP_OFFSET 16 58 #define IPV4_OPTIONS_OFFSET 20 59 60 61 #define IPV4_VER_MASK 0xf0 62 #define IPV4_VER_SHIFT 4 63 64 #define IPV4_HLEN_MASK 0x0f 65 #define IPV4_HLEN(ipv4_body) (4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK)) 66 67 #define IPV4_ADDR_LEN 4 68 69 #define IPV4_ADDR_NULL(a) ((((uint8 *)(a))[0] | ((uint8 *)(a))[1] | \ 70 ((uint8 *)(a))[2] | ((uint8 *)(a))[3]) == 0) 71 72 #define IPV4_ADDR_BCAST(a) ((((uint8 *)(a))[0] & ((uint8 *)(a))[1] & \ 73 ((uint8 *)(a))[2] & ((uint8 *)(a))[3]) == 0xff) 74 75 #define IPV4_TOS_DSCP_MASK 0xfc 76 #define IPV4_TOS_DSCP_SHIFT 2 77 78 #define IPV4_TOS(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET]) 79 80 #define IPV4_TOS_PREC_MASK 0xe0 81 #define IPV4_TOS_PREC_SHIFT 5 82 83 #define IPV4_TOS_LOWDELAY 0x10 84 #define IPV4_TOS_THROUGHPUT 0x8 85 #define IPV4_TOS_RELIABILITY 0x4 86 87 #define IPV4_PROT(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET]) 88 89 #define IPV4_FRAG_RESV 0x8000 90 #define IPV4_FRAG_DONT 0x4000 91 #define IPV4_FRAG_MORE 0x2000 92 #define IPV4_FRAG_OFFSET_MASK 0x1fff 93 94 #define IPV4_ADDR_STR_LEN 16 95 96 97 BWL_PRE_PACKED_STRUCT struct ipv4_addr { 98 uint8 addr[IPV4_ADDR_LEN]; 99 } BWL_POST_PACKED_STRUCT; 100 101 BWL_PRE_PACKED_STRUCT struct ipv4_hdr { 102 uint8 version_ihl; 103 uint8 tos; 104 uint16 tot_len; 105 uint16 id; 106 uint16 frag; 107 uint8 ttl; 108 uint8 prot; 109 uint16 hdr_chksum; 110 uint8 src_ip[IPV4_ADDR_LEN]; 111 uint8 dst_ip[IPV4_ADDR_LEN]; 112 } BWL_POST_PACKED_STRUCT; 113 114 115 #define IPV6_PAYLOAD_LEN_OFFSET 4 116 #define IPV6_NEXT_HDR_OFFSET 6 117 #define IPV6_HOP_LIMIT_OFFSET 7 118 #define IPV6_SRC_IP_OFFSET 8 119 #define IPV6_DEST_IP_OFFSET 24 120 121 122 #define IPV6_TRAFFIC_CLASS(ipv6_body) \ 123 (((((uint8 *)(ipv6_body))[0] & 0x0f) << 4) | \ 124 ((((uint8 *)(ipv6_body))[1] & 0xf0) >> 4)) 125 126 #define IPV6_FLOW_LABEL(ipv6_body) \ 127 (((((uint8 *)(ipv6_body))[1] & 0x0f) << 16) | \ 128 (((uint8 *)(ipv6_body))[2] << 8) | \ 129 (((uint8 *)(ipv6_body))[3])) 130 131 #define IPV6_PAYLOAD_LEN(ipv6_body) \ 132 ((((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 0] << 8) | \ 133 ((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 1]) 134 135 #define IPV6_NEXT_HDR(ipv6_body) \ 136 (((uint8 *)(ipv6_body))[IPV6_NEXT_HDR_OFFSET]) 137 138 #define IPV6_PROT(ipv6_body) IPV6_NEXT_HDR(ipv6_body) 139 140 #define IPV6_ADDR_LEN 16 141 142 143 #define IP_TOS46(ip_body) \ 144 (IP_VER(ip_body) == IP_VER_4 ? IPV4_TOS(ip_body) : \ 145 IP_VER(ip_body) == IP_VER_6 ? IPV6_TRAFFIC_CLASS(ip_body) : 0) 146 147 148 #include <packed_section_end.h> 149 150 #endif 151