1 /****************************************************************************** 2 * 3 * Copyright(c) 2007 - 2017 Realtek Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 *****************************************************************************/ 15 #ifndef _LINUX_IP_H 16 #define _LINUX_IP_H 17 18 /* SOL_IP socket options */ 19 20 #define IPTOS_TOS_MASK 0x1E 21 #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) 22 #define IPTOS_LOWDELAY 0x10 23 #define IPTOS_THROUGHPUT 0x08 24 #define IPTOS_RELIABILITY 0x04 25 #define IPTOS_MINCOST 0x02 26 27 #define IPTOS_PREC_MASK 0xE0 28 #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) 29 #define IPTOS_PREC_NETCONTROL 0xe0 30 #define IPTOS_PREC_INTERNETCONTROL 0xc0 31 #define IPTOS_PREC_CRITIC_ECP 0xa0 32 #define IPTOS_PREC_FLASHOVERRIDE 0x80 33 #define IPTOS_PREC_FLASH 0x60 34 #define IPTOS_PREC_IMMEDIATE 0x40 35 #define IPTOS_PREC_PRIORITY 0x20 36 #define IPTOS_PREC_ROUTINE 0x00 37 38 39 /* IP options */ 40 #define IPOPT_COPY 0x80 41 #define IPOPT_CLASS_MASK 0x60 42 #define IPOPT_NUMBER_MASK 0x1f 43 44 #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) 45 #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) 46 #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) 47 48 #define IPOPT_CONTROL 0x00 49 #define IPOPT_RESERVED1 0x20 50 #define IPOPT_MEASUREMENT 0x40 51 #define IPOPT_RESERVED2 0x60 52 53 #define IPOPT_END (0 | IPOPT_CONTROL) 54 #define IPOPT_NOOP (1 | IPOPT_CONTROL) 55 #define IPOPT_SEC (2 | IPOPT_CONTROL | IPOPT_COPY) 56 #define IPOPT_LSRR (3 | IPOPT_CONTROL | IPOPT_COPY) 57 #define IPOPT_TIMESTAMP (4 | IPOPT_MEASUREMENT) 58 #define IPOPT_RR (7 | IPOPT_CONTROL) 59 #define IPOPT_SID (8 | IPOPT_CONTROL | IPOPT_COPY) 60 #define IPOPT_SSRR (9 | IPOPT_CONTROL | IPOPT_COPY) 61 #define IPOPT_RA (20 | IPOPT_CONTROL | IPOPT_COPY) 62 63 #define IPVERSION 4 64 #define MAXTTL 255 65 #define IPDEFTTL 64 66 67 /* struct timestamp, struct route and MAX_ROUTES are removed. 68 69 REASONS: it is clear that nobody used them because: 70 - MAX_ROUTES value was wrong. 71 - "struct route" was wrong. 72 - "struct timestamp" had fatally misaligned bitfields and was completely unusable. 73 */ 74 75 #define IPOPT_OPTVAL 0 76 #define IPOPT_OLEN 1 77 #define IPOPT_OFFSET 2 78 #define IPOPT_MINOFF 4 79 #define MAX_IPOPTLEN 40 80 #define IPOPT_NOP IPOPT_NOOP 81 #define IPOPT_EOL IPOPT_END 82 #define IPOPT_TS IPOPT_TIMESTAMP 83 84 #define IPOPT_TS_TSONLY 0 /* timestamps only */ 85 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 86 #define IPOPT_TS_PRESPEC 3 /* specified modules only */ 87 88 #ifdef PLATFORM_LINUX 89 90 struct ip_options { 91 __u32 faddr; /* Saved first hop address */ 92 unsigned char optlen; 93 unsigned char srr; 94 unsigned char rr; 95 unsigned char ts; 96 unsigned char is_setbyuser:1, /* Set by setsockopt? */ 97 is_data:1, /* Options in __data, rather than skb */ 98 is_strictroute:1, /* Strict source route */ 99 srr_is_hit:1, /* Packet destination addr was our one */ 100 is_changed:1, /* IP checksum more not valid */ 101 rr_needaddr:1, /* Need to record addr of outgoing dev */ 102 ts_needtime:1, /* Need to record timestamp */ 103 ts_needaddr:1; /* Need to record addr of outgoing dev */ 104 unsigned char router_alert; 105 unsigned char __pad1; 106 unsigned char __pad2; 107 unsigned char __data[0]; 108 }; 109 110 #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) 111 #endif 112 113 struct iphdr { 114 #if defined(__LITTLE_ENDIAN_BITFIELD) 115 __u8 ihl:4, 116 version:4; 117 #elif defined (__BIG_ENDIAN_BITFIELD) 118 __u8 version:4, 119 ihl:4; 120 #else 121 #error "Please fix <asm/byteorder.h>" 122 #endif 123 __u8 tos; 124 __u16 tot_len; 125 __u16 id; 126 __u16 frag_off; 127 __u8 ttl; 128 __u8 protocol; 129 __u16 check; 130 __u32 saddr; 131 __u32 daddr; 132 /*The options start here. */ 133 }; 134 135 #endif /* _LINUX_IP_H */ 136