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14c85021 ACM |
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 | */ | |
40 | struct 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 | ||
62 | struct 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 | ||
81 | static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) | |
82 | { | |
83 | return (struct inet_request_sock *)sk; | |
84 | } | |
85 | ||
86 | struct ip_mc_socklist; | |
87 | struct ipv6_pinfo; | |
88 | struct 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 | */ | |
109 | struct 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 | ||
151 | static inline struct inet_sock *inet_sk(const struct sock *sk) | |
152 | { | |
153 | return (struct inet_sock *)sk; | |
154 | } | |
155 | ||
156 | static 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)) | |
164 | static 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 | ||
171 | extern int inet_sk_rebuild_header(struct sock *sk); | |
172 | ||
173 | static 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 | ||
182 | static 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 */ |