/* * 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 <asm/byteorder.h> #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 #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 */ #ifdef __KERNEL__ #include <linux/config.h> #include <linux/types.h> #include <net/sock.h> #include <linux/igmp.h> #include <net/flow.h> 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 ipv6_pinfo; struct inet_sock { /* sk and pinet6 has to be the first two members of inet_sock */ struct sock sk; #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) struct ipv6_pinfo *pinet6; #endif /* Socket demultiplex comparisons on incoming packets. */ __u32 daddr; /* Foreign IPv4 addr */ __u32 rcv_saddr; /* Bound local IPv4 addr */ __u16 dport; /* Destination port */ __u16 num; /* Local port */ __u32 saddr; /* Sending source */ __s16 uc_ttl; /* Unicast TTL */ __u16 cmsg_flags; struct ip_options *opt; __u16 sport; /* Source port */ __u16 id; /* ID counter for DF pkts */ __u8 tos; /* TOS */ __u8 mc_ttl; /* Multicasting TTL */ __u8 pmtudisc; unsigned recverr : 1, freebind : 1, hdrincl : 1, mc_loop : 1; int mc_index; /* Multicast device index */ __u32 mc_addr; struct ip_mc_socklist *mc_list; /* Group array */ /* * Following members are used to retain the infomation to build * an ip header on each ip fragmentation while the socket is corked. */ struct { unsigned int flags; unsigned int fragsize; struct ip_options *opt; struct rtable *rt; int length; /* Total length of all frames */ u32 addr; struct flowi fl; } cork; }; #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */ static inline struct inet_sock *inet_sk(const struct sock *sk) { return (struct inet_sock *)sk; } static inline void __inet_sk_copy_descendant(struct sock *sk_to, const struct sock *sk_from, const int ancestor_size) { memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1, sk_from->sk_prot->obj_size - ancestor_size); } #if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) static inline void inet_sk_copy_descendant(struct sock *sk_to, const struct sock *sk_from) { __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock)); } #endif #endif 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. */ }; struct ip_auth_hdr { __u8 nexthdr; __u8 hdrlen; /* This one is measured in 32 bit units! */ __u16 reserved; __u32 spi; __u32 seq_no; /* Sequence number */ __u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */ }; struct ip_esp_hdr { __u32 spi; __u32 seq_no; /* Sequence number */ __u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */ }; struct ip_comp_hdr { __u8 nexthdr; __u8 flags; __u16 cpi; }; #endif /* _LINUX_IP_H */