/* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for the IP protocol. * * Version: @(#)ip.h 1.0.2 04/28/93 * * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _LINUX_IP_H #define _LINUX_IP_H #include "rtl871x_byteorder.h" /* SOL_IP socket options */ #define IPTOS_TOS_MASK 0x1E #define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK) #define IPTOS_LOWDELAY 0x10 #define IPTOS_THROUGHPUT 0x08 #define IPTOS_RELIABILITY 0x04 #define IPTOS_MINCOST 0x02 #define IPTOS_PREC_MASK 0xE0 #define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK) #define IPTOS_PREC_NETCONTROL 0xe0 #define IPTOS_PREC_INTERNETCONTROL 0xc0 #define IPTOS_PREC_CRITIC_ECP 0xa0 #define IPTOS_PREC_FLASHOVERRIDE 0x80 #define IPTOS_PREC_FLASH 0x60 #define IPTOS_PREC_IMMEDIATE 0x40 #define IPTOS_PREC_PRIORITY 0x20 #define IPTOS_PREC_ROUTINE 0x00 /* IP options */ #define IPOPT_COPY 0x80 #define IPOPT_CLASS_MASK 0x60 #define IPOPT_NUMBER_MASK 0x1f #define IPOPT_COPIED(o) ((o)&IPOPT_COPY) #define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK) #define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK) #define IPOPT_CONTROL 0x00 #define IPOPT_RESERVED1 0x20 #define IPOPT_MEASUREMENT 0x40 #define IPOPT_RESERVED2 0x60 #define IPOPT_END (0 | IPOPT_CONTROL) #define IPOPT_NOOP (1 | IPOPT_CONTROL) #define IPOPT_SEC (2 | IPOPT_CONTROL|IPOPT_COPY) #define IPOPT_LSRR (3 | IPOPT_CONTROL|IPOPT_COPY) #define IPOPT_TIMESTAMP (4 | IPOPT_MEASUREMENT) #define IPOPT_RR (7 | IPOPT_CONTROL) #define IPOPT_SID (8 | IPOPT_CONTROL | IPOPT_COPY) #define IPOPT_SSRR (9 | IPOPT_CONTROL | IPOPT_COPY) #define IPOPT_RA (20 | IPOPT_CONTROL | IPOPT_COPY) #define IPVERSION 4 #define MAXTTL 255 #define IPDEFTTL 64 /* struct timestamp, struct route and MAX_ROUTES are removed. * * REASONS: it is clear that nobody used them because: * - MAX_ROUTES value was wrong. * - "struct route" was wrong. * - "struct timestamp" had fatally misaligned bitfields and was completely * unusable. */ #define IPOPT_OPTVAL 0 #define IPOPT_OLEN 1 #define IPOPT_OFFSET 2 #define IPOPT_MINOFF 4 #define MAX_IPOPTLEN 40 #define IPOPT_NOP IPOPT_NOOP #define IPOPT_EOL IPOPT_END #define IPOPT_TS IPOPT_TIMESTAMP #define IPOPT_TS_TSONLY 0 /* timestamps only */ #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ #define IPOPT_TS_PRESPEC 3 /* specified modules only */ struct ip_options { __u32 faddr; /* Saved first hop address */ unsigned char optlen; unsigned char srr; unsigned char rr; unsigned char ts; unsigned char is_setbyuser:1, /* Set by setsockopt? */ is_data:1, /* Options in __data, rather than skb */ is_strictroute:1, /* Strict source route */ srr_is_hit:1, /* Packet destination addr was our one*/ is_changed:1, /* IP checksum more not valid */ rr_needaddr:1, /* Need to record addr of outgoing dev*/ ts_needtime:1, /* Need to record timestamp */ ts_needaddr:1; /* Need to record addr of outgoing dev*/ unsigned char router_alert; unsigned char __pad1; unsigned char __pad2; unsigned char __data[0]; }; #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) struct iphdr { #if defined(__LITTLE_ENDIAN_BITFIELD) __u8 ihl:4, version:4; #elif defined(__BIG_ENDIAN_BITFIELD) __u8 version:4, ihl:4; #else #error "Please fix <asm/byteorder.h>" #endif __u8 tos; __u16 tot_len; __u16 id; __u16 frag_off; __u8 ttl; __u8 protocol; __u16 check; __u32 saddr; __u32 daddr; /*The options start here. */ }; #endif /* _LINUX_IP_H */