blob: 62daf214931f5ddf825e5cd9b577b9ea2b6159d3 [file] [log] [blame]
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -02001/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for inet_sock
7 *
8 * Authors: Many, reorganised here by
9 * Arnaldo Carvalho de Melo <acme@mandriva.com>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16#ifndef _INET_SOCK_H
17#define _INET_SOCK_H
18
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020019
20#include <linux/string.h>
21#include <linux/types.h>
David S. Millerb3da2cf2007-03-23 11:40:27 -070022#include <linux/jhash.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020023
24#include <net/flow.h>
25#include <net/sock.h>
26#include <net/request_sock.h>
27
28/** struct ip_options - IP Options
29 *
30 * @faddr - Saved first hop address
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020031 * @is_data - Options in __data, rather than skb
32 * @is_strictroute - Strict source route
33 * @srr_is_hit - Packet destination addr was our one
34 * @is_changed - IP checksum more not valid
35 * @rr_needaddr - Need to record addr of outgoing dev
36 * @ts_needtime - Need to record timestamp
37 * @ts_needaddr - Need to record addr of outgoing dev
38 */
39struct ip_options {
Al Viro3ca3c682006-09-27 18:28:07 -070040 __be32 faddr;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020041 unsigned char optlen;
42 unsigned char srr;
43 unsigned char rr;
44 unsigned char ts;
Louis Nyffenegger1a019122006-08-08 00:56:11 -070045 unsigned char is_data:1,
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020046 is_strictroute:1,
47 srr_is_hit:1,
48 is_changed:1,
49 rr_needaddr:1,
50 ts_needtime:1,
51 ts_needaddr:1;
52 unsigned char router_alert;
Paul Moore11a03f72006-08-03 16:46:20 -070053 unsigned char cipso;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020054 unsigned char __pad2;
55 unsigned char __data[0];
56};
57
58#define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
59
60struct inet_request_sock {
61 struct request_sock req;
62#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
63 u16 inet6_rsk_offset;
64 /* 2 bytes hole, try to pack */
65#endif
Al Viroadaf3452006-09-27 18:27:13 -070066 __be32 loc_addr;
67 __be32 rmt_addr;
Al Viroe11be942006-09-27 18:35:29 -070068 __be16 rmt_port;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020069 u16 snd_wscale : 4,
70 rcv_wscale : 4,
71 tstamp_ok : 1,
72 sack_ok : 1,
73 wscale_ok : 1,
74 ecn_ok : 1,
75 acked : 1;
76 struct ip_options *opt;
77};
78
79static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
80{
81 return (struct inet_request_sock *)sk;
82}
83
84struct ip_mc_socklist;
85struct ipv6_pinfo;
86struct rtable;
87
88/** struct inet_sock - representation of INET sockets
89 *
90 * @sk - ancestor class
91 * @pinet6 - pointer to IPv6 control block
92 * @daddr - Foreign IPv4 addr
93 * @rcv_saddr - Bound local IPv4 addr
94 * @dport - Destination port
95 * @num - Local port
96 * @saddr - Sending source
97 * @uc_ttl - Unicast TTL
98 * @sport - Source port
99 * @id - ID counter for DF pkts
100 * @tos - TOS
101 * @mc_ttl - Multicasting TTL
102 * @is_icsk - is this an inet_connection_sock?
103 * @mc_index - Multicast device index
104 * @mc_list - Group array
105 * @cork - info to build ip hdr on each ip frag while socket is corked
106 */
107struct inet_sock {
108 /* sk and pinet6 has to be the first two members of inet_sock */
109 struct sock sk;
110#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
111 struct ipv6_pinfo *pinet6;
112#endif
113 /* Socket demultiplex comparisons on incoming packets. */
Al Viro011a9262006-09-26 21:27:35 -0700114 __be32 daddr;
115 __be32 rcv_saddr;
Al Viro2816e122006-09-27 18:33:05 -0700116 __be16 dport;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200117 __u16 num;
Al Viro011a9262006-09-26 21:27:35 -0700118 __be32 saddr;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200119 __s16 uc_ttl;
120 __u16 cmsg_flags;
121 struct ip_options *opt;
Al Viro2816e122006-09-27 18:33:05 -0700122 __be16 sport;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200123 __u16 id;
124 __u8 tos;
125 __u8 mc_ttl;
126 __u8 pmtudisc;
127 __u8 recverr:1,
128 is_icsk:1,
129 freebind:1,
130 hdrincl:1,
131 mc_loop:1;
132 int mc_index;
Al Viro011a9262006-09-26 21:27:35 -0700133 __be32 mc_addr;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200134 struct ip_mc_socklist *mc_list;
135 struct {
136 unsigned int flags;
137 unsigned int fragsize;
138 struct ip_options *opt;
139 struct rtable *rt;
140 int length; /* Total length of all frames */
Al Viro011a9262006-09-26 21:27:35 -0700141 __be32 addr;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200142 struct flowi fl;
143 } cork;
144};
145
146#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
147#define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
148
149static inline struct inet_sock *inet_sk(const struct sock *sk)
150{
151 return (struct inet_sock *)sk;
152}
153
154static inline void __inet_sk_copy_descendant(struct sock *sk_to,
155 const struct sock *sk_from,
156 const int ancestor_size)
157{
158 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
159 sk_from->sk_prot->obj_size - ancestor_size);
160}
161#if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE))
162static inline void inet_sk_copy_descendant(struct sock *sk_to,
163 const struct sock *sk_from)
164{
165 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
166}
167#endif
168
169extern int inet_sk_rebuild_header(struct sock *sk);
170
David S. Millerb3da2cf2007-03-23 11:40:27 -0700171extern u32 inet_ehash_secret;
172extern void build_ehash_secret(void);
173
Al Virofb99c842006-09-27 18:43:33 -0700174static inline unsigned int inet_ehashfn(const __be32 laddr, const __u16 lport,
175 const __be32 faddr, const __be16 fport)
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200176{
David S. Millerb3da2cf2007-03-23 11:40:27 -0700177 return jhash_2words((__force __u32) laddr ^ (__force __u32) faddr,
178 ((__u32) lport) << 16 | (__force __u32)fport,
179 inet_ehash_secret);
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200180}
181
182static inline int inet_sk_ehashfn(const struct sock *sk)
183{
184 const struct inet_sock *inet = inet_sk(sk);
Al Virofb99c842006-09-27 18:43:33 -0700185 const __be32 laddr = inet->rcv_saddr;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200186 const __u16 lport = inet->num;
Al Virofb99c842006-09-27 18:43:33 -0700187 const __be32 faddr = inet->daddr;
188 const __be16 fport = inet->dport;
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200189
190 return inet_ehashfn(laddr, lport, faddr, fport);
191}
192
193#endif /* _INET_SOCK_H */