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-rw-r--r--include/net/inet_sock.h193
1 files changed, 193 insertions, 0 deletions
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
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1/*
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
19#include <linux/config.h>
20
21#include <linux/string.h>
22#include <linux/types.h>
23
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
31 * @is_setbyuser - Set by setsockopt?
32 * @is_data - Options in __data, rather than skb
33 * @is_strictroute - Strict source route
34 * @srr_is_hit - Packet destination addr was our one
35 * @is_changed - IP checksum more not valid
36 * @rr_needaddr - Need to record addr of outgoing dev
37 * @ts_needtime - Need to record timestamp
38 * @ts_needaddr - Need to record addr of outgoing dev
39 */
40struct ip_options {
41 __u32 faddr;
42 unsigned char optlen;
43 unsigned char srr;
44 unsigned char rr;
45 unsigned char ts;
46 unsigned char is_setbyuser:1,
47 is_data:1,
48 is_strictroute:1,
49 srr_is_hit:1,
50 is_changed:1,
51 rr_needaddr:1,
52 ts_needtime:1,
53 ts_needaddr:1;
54 unsigned char router_alert;
55 unsigned char __pad1;
56 unsigned char __pad2;
57 unsigned char __data[0];
58};
59
60#define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
61
62struct inet_request_sock {
63 struct request_sock req;
64#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
65 u16 inet6_rsk_offset;
66 /* 2 bytes hole, try to pack */
67#endif
68 u32 loc_addr;
69 u32 rmt_addr;
70 u16 rmt_port;
71 u16 snd_wscale : 4,
72 rcv_wscale : 4,
73 tstamp_ok : 1,
74 sack_ok : 1,
75 wscale_ok : 1,
76 ecn_ok : 1,
77 acked : 1;
78 struct ip_options *opt;
79};
80
81static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
82{
83 return (struct inet_request_sock *)sk;
84}
85
86struct ip_mc_socklist;
87struct ipv6_pinfo;
88struct rtable;
89
90/** struct inet_sock - representation of INET sockets
91 *
92 * @sk - ancestor class
93 * @pinet6 - pointer to IPv6 control block
94 * @daddr - Foreign IPv4 addr
95 * @rcv_saddr - Bound local IPv4 addr
96 * @dport - Destination port
97 * @num - Local port
98 * @saddr - Sending source
99 * @uc_ttl - Unicast TTL
100 * @sport - Source port
101 * @id - ID counter for DF pkts
102 * @tos - TOS
103 * @mc_ttl - Multicasting TTL
104 * @is_icsk - is this an inet_connection_sock?
105 * @mc_index - Multicast device index
106 * @mc_list - Group array
107 * @cork - info to build ip hdr on each ip frag while socket is corked
108 */
109struct inet_sock {
110 /* sk and pinet6 has to be the first two members of inet_sock */
111 struct sock sk;
112#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
113 struct ipv6_pinfo *pinet6;
114#endif
115 /* Socket demultiplex comparisons on incoming packets. */
116 __u32 daddr;
117 __u32 rcv_saddr;
118 __u16 dport;
119 __u16 num;
120 __u32 saddr;
121 __s16 uc_ttl;
122 __u16 cmsg_flags;
123 struct ip_options *opt;
124 __u16 sport;
125 __u16 id;
126 __u8 tos;
127 __u8 mc_ttl;
128 __u8 pmtudisc;
129 __u8 recverr:1,
130 is_icsk:1,
131 freebind:1,
132 hdrincl:1,
133 mc_loop:1;
134 int mc_index;
135 __u32 mc_addr;
136 struct ip_mc_socklist *mc_list;
137 struct {
138 unsigned int flags;
139 unsigned int fragsize;
140 struct ip_options *opt;
141 struct rtable *rt;
142 int length; /* Total length of all frames */
143 u32 addr;
144 struct flowi fl;
145 } cork;
146};
147
148#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
149#define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
150
151static inline struct inet_sock *inet_sk(const struct sock *sk)
152{
153 return (struct inet_sock *)sk;
154}
155
156static inline void __inet_sk_copy_descendant(struct sock *sk_to,
157 const struct sock *sk_from,
158 const int ancestor_size)
159{
160 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
161 sk_from->sk_prot->obj_size - ancestor_size);
162}
163#if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE))
164static inline void inet_sk_copy_descendant(struct sock *sk_to,
165 const struct sock *sk_from)
166{
167 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
168}
169#endif
170
171extern int inet_sk_rebuild_header(struct sock *sk);
172
173static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport,
174 const __u32 faddr, const __u16 fport)
175{
176 unsigned int h = (laddr ^ lport) ^ (faddr ^ fport);
177 h ^= h >> 16;
178 h ^= h >> 8;
179 return h;
180}
181
182static inline int inet_sk_ehashfn(const struct sock *sk)
183{
184 const struct inet_sock *inet = inet_sk(sk);
185 const __u32 laddr = inet->rcv_saddr;
186 const __u16 lport = inet->num;
187 const __u32 faddr = inet->daddr;
188 const __u16 fport = inet->dport;
189
190 return inet_ehashfn(laddr, lport, faddr, fport);
191}
192
193#endif /* _INET_SOCK_H */
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