a55ebcc4c4
This should really be in a inet_connection_sock, but I'm leaving it for a later optimization, when some more fields common to INET transport protocols now in tcp_sk or inet_sk will be chunked out into inet_connection_sock, for now its better to concentrate on getting the changes in the core merged to leave the DCCP tree with only DCCP specific code. Next changesets will take advantage of this move to generalise things like tcp_bind_hash, tcp_put_port, tcp_inherit_port, making the later receive a inet_hashinfo parameter, and even __tcp_tw_hashdance, etc in the future, when tcp_tw_bucket gets transformed into the struct timewait_sock hierarchy. tcp_destroy_sock also is eligible as soon as tcp_orphan_count gets moved to sk_prot. A cascade of incremental changes will ultimately make the tcp_lookup functions be fully generic. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
246 lines
6.7 KiB
C
246 lines
6.7 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the IP protocol.
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*
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* Version: @(#)ip.h 1.0.2 04/28/93
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*
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* Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_IP_H
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#define _LINUX_IP_H
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#include <asm/byteorder.h>
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#define IPTOS_TOS_MASK 0x1E
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#define IPTOS_TOS(tos) ((tos)&IPTOS_TOS_MASK)
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#define IPTOS_LOWDELAY 0x10
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#define IPTOS_THROUGHPUT 0x08
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#define IPTOS_RELIABILITY 0x04
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#define IPTOS_MINCOST 0x02
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#define IPTOS_PREC_MASK 0xE0
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#define IPTOS_PREC(tos) ((tos)&IPTOS_PREC_MASK)
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#define IPTOS_PREC_NETCONTROL 0xe0
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#define IPTOS_PREC_INTERNETCONTROL 0xc0
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#define IPTOS_PREC_CRITIC_ECP 0xa0
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#define IPTOS_PREC_FLASHOVERRIDE 0x80
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#define IPTOS_PREC_FLASH 0x60
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#define IPTOS_PREC_IMMEDIATE 0x40
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#define IPTOS_PREC_PRIORITY 0x20
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#define IPTOS_PREC_ROUTINE 0x00
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/* IP options */
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#define IPOPT_COPY 0x80
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#define IPOPT_CLASS_MASK 0x60
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#define IPOPT_NUMBER_MASK 0x1f
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#define IPOPT_COPIED(o) ((o)&IPOPT_COPY)
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#define IPOPT_CLASS(o) ((o)&IPOPT_CLASS_MASK)
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#define IPOPT_NUMBER(o) ((o)&IPOPT_NUMBER_MASK)
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#define IPOPT_CONTROL 0x00
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#define IPOPT_RESERVED1 0x20
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#define IPOPT_MEASUREMENT 0x40
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#define IPOPT_RESERVED2 0x60
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#define IPOPT_END (0 |IPOPT_CONTROL)
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#define IPOPT_NOOP (1 |IPOPT_CONTROL)
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#define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_LSRR (3 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT)
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#define IPOPT_RR (7 |IPOPT_CONTROL)
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#define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_SSRR (9 |IPOPT_CONTROL|IPOPT_COPY)
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#define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY)
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#define IPVERSION 4
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#define MAXTTL 255
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#define IPDEFTTL 64
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#define IPOPT_OPTVAL 0
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#define IPOPT_OLEN 1
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#define IPOPT_OFFSET 2
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#define IPOPT_MINOFF 4
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#define MAX_IPOPTLEN 40
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#define IPOPT_NOP IPOPT_NOOP
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#define IPOPT_EOL IPOPT_END
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#define IPOPT_TS IPOPT_TIMESTAMP
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#define IPOPT_TS_TSONLY 0 /* timestamps only */
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#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
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#define IPOPT_TS_PRESPEC 3 /* specified modules only */
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#ifdef __KERNEL__
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#include <linux/config.h>
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#include <linux/types.h>
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#include <net/request_sock.h>
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#include <net/sock.h>
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#include <linux/igmp.h>
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#include <net/flow.h>
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struct ip_options {
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__u32 faddr; /* Saved first hop address */
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unsigned char optlen;
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unsigned char srr;
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unsigned char rr;
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unsigned char ts;
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unsigned char is_setbyuser:1, /* Set by setsockopt? */
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is_data:1, /* Options in __data, rather than skb */
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is_strictroute:1, /* Strict source route */
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srr_is_hit:1, /* Packet destination addr was our one */
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is_changed:1, /* IP checksum more not valid */
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rr_needaddr:1, /* Need to record addr of outgoing dev */
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ts_needtime:1, /* Need to record timestamp */
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ts_needaddr:1; /* Need to record addr of outgoing dev */
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unsigned char router_alert;
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unsigned char __pad1;
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unsigned char __pad2;
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unsigned char __data[0];
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};
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#define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
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struct inet_request_sock {
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struct request_sock req;
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u32 loc_addr;
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u32 rmt_addr;
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u16 rmt_port;
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u16 snd_wscale : 4,
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rcv_wscale : 4,
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tstamp_ok : 1,
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sack_ok : 1,
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wscale_ok : 1,
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ecn_ok : 1,
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acked : 1;
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struct ip_options *opt;
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};
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static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
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{
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return (struct inet_request_sock *)sk;
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}
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struct inet_bind_bucket;
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struct ipv6_pinfo;
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struct inet_sock {
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/* sk and pinet6 has to be the first two members of inet_sock */
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struct sock sk;
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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struct ipv6_pinfo *pinet6;
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#endif
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/* Socket demultiplex comparisons on incoming packets. */
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__u32 daddr; /* Foreign IPv4 addr */
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__u32 rcv_saddr; /* Bound local IPv4 addr */
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__u16 dport; /* Destination port */
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__u16 num; /* Local port */
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__u32 saddr; /* Sending source */
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__s16 uc_ttl; /* Unicast TTL */
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__u16 cmsg_flags;
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struct ip_options *opt;
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__u16 sport; /* Source port */
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__u16 id; /* ID counter for DF pkts */
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__u8 tos; /* TOS */
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__u8 mc_ttl; /* Multicasting TTL */
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__u8 pmtudisc;
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unsigned recverr : 1,
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freebind : 1,
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hdrincl : 1,
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mc_loop : 1;
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int mc_index; /* Multicast device index */
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__u32 mc_addr;
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struct ip_mc_socklist *mc_list; /* Group array */
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struct inet_bind_bucket *bind_hash;
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/*
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* Following members are used to retain the infomation to build
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* an ip header on each ip fragmentation while the socket is corked.
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*/
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struct {
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unsigned int flags;
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unsigned int fragsize;
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struct ip_options *opt;
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struct rtable *rt;
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int length; /* Total length of all frames */
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u32 addr;
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struct flowi fl;
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} cork;
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};
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#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
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#define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
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static inline struct inet_sock *inet_sk(const struct sock *sk)
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{
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return (struct inet_sock *)sk;
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}
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static inline void __inet_sk_copy_descendant(struct sock *sk_to,
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const struct sock *sk_from,
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const int ancestor_size)
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{
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memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
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sk_from->sk_prot->obj_size - ancestor_size);
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}
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#if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE))
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static inline void inet_sk_copy_descendant(struct sock *sk_to,
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const struct sock *sk_from)
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{
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__inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
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}
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#endif
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#endif
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extern int inet_sk_rebuild_header(struct sock *sk);
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struct iphdr {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 ihl:4,
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version:4;
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#elif defined (__BIG_ENDIAN_BITFIELD)
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__u8 version:4,
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ihl:4;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__u8 tos;
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__u16 tot_len;
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__u16 id;
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__u16 frag_off;
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__u8 ttl;
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__u8 protocol;
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__u16 check;
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__u32 saddr;
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__u32 daddr;
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/*The options start here. */
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};
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struct ip_auth_hdr {
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__u8 nexthdr;
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__u8 hdrlen; /* This one is measured in 32 bit units! */
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__u16 reserved;
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__u32 spi;
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__u32 seq_no; /* Sequence number */
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__u8 auth_data[0]; /* Variable len but >=4. Mind the 64 bit alignment! */
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};
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struct ip_esp_hdr {
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__u32 spi;
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__u32 seq_no; /* Sequence number */
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__u8 enc_data[0]; /* Variable len but >=8. Mind the 64 bit alignment! */
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};
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struct ip_comp_hdr {
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__u8 nexthdr;
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__u8 flags;
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__u16 cpi;
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};
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#endif /* _LINUX_IP_H */
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