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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 | ||
14c85021 ACM |
19 | |
20 | #include <linux/string.h> | |
21 | #include <linux/types.h> | |
22 | ||
23 | #include <net/flow.h> | |
24 | #include <net/sock.h> | |
25 | #include <net/request_sock.h> | |
26 | ||
27 | /** struct ip_options - IP Options | |
28 | * | |
29 | * @faddr - Saved first hop address | |
14c85021 ACM |
30 | * @is_data - Options in __data, rather than skb |
31 | * @is_strictroute - Strict source route | |
32 | * @srr_is_hit - Packet destination addr was our one | |
33 | * @is_changed - IP checksum more not valid | |
34 | * @rr_needaddr - Need to record addr of outgoing dev | |
35 | * @ts_needtime - Need to record timestamp | |
36 | * @ts_needaddr - Need to record addr of outgoing dev | |
37 | */ | |
38 | struct ip_options { | |
3ca3c68e | 39 | __be32 faddr; |
14c85021 ACM |
40 | unsigned char optlen; |
41 | unsigned char srr; | |
42 | unsigned char rr; | |
43 | unsigned char ts; | |
1a01912a | 44 | unsigned char is_data:1, |
14c85021 ACM |
45 | is_strictroute:1, |
46 | srr_is_hit:1, | |
47 | is_changed:1, | |
48 | rr_needaddr:1, | |
49 | ts_needtime:1, | |
50 | ts_needaddr:1; | |
51 | unsigned char router_alert; | |
11a03f78 | 52 | unsigned char cipso; |
14c85021 ACM |
53 | unsigned char __pad2; |
54 | unsigned char __data[0]; | |
55 | }; | |
56 | ||
57 | #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) | |
58 | ||
59 | struct inet_request_sock { | |
60 | struct request_sock req; | |
61 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
62 | u16 inet6_rsk_offset; | |
63 | /* 2 bytes hole, try to pack */ | |
64 | #endif | |
adaf345b AV |
65 | __be32 loc_addr; |
66 | __be32 rmt_addr; | |
14c85021 ACM |
67 | u16 rmt_port; |
68 | u16 snd_wscale : 4, | |
69 | rcv_wscale : 4, | |
70 | tstamp_ok : 1, | |
71 | sack_ok : 1, | |
72 | wscale_ok : 1, | |
73 | ecn_ok : 1, | |
74 | acked : 1; | |
75 | struct ip_options *opt; | |
76 | }; | |
77 | ||
78 | static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) | |
79 | { | |
80 | return (struct inet_request_sock *)sk; | |
81 | } | |
82 | ||
83 | struct ip_mc_socklist; | |
84 | struct ipv6_pinfo; | |
85 | struct rtable; | |
86 | ||
87 | /** struct inet_sock - representation of INET sockets | |
88 | * | |
89 | * @sk - ancestor class | |
90 | * @pinet6 - pointer to IPv6 control block | |
91 | * @daddr - Foreign IPv4 addr | |
92 | * @rcv_saddr - Bound local IPv4 addr | |
93 | * @dport - Destination port | |
94 | * @num - Local port | |
95 | * @saddr - Sending source | |
96 | * @uc_ttl - Unicast TTL | |
97 | * @sport - Source port | |
98 | * @id - ID counter for DF pkts | |
99 | * @tos - TOS | |
100 | * @mc_ttl - Multicasting TTL | |
101 | * @is_icsk - is this an inet_connection_sock? | |
102 | * @mc_index - Multicast device index | |
103 | * @mc_list - Group array | |
104 | * @cork - info to build ip hdr on each ip frag while socket is corked | |
105 | */ | |
106 | struct inet_sock { | |
107 | /* sk and pinet6 has to be the first two members of inet_sock */ | |
108 | struct sock sk; | |
109 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
110 | struct ipv6_pinfo *pinet6; | |
111 | #endif | |
112 | /* Socket demultiplex comparisons on incoming packets. */ | |
011a9261 AV |
113 | __be32 daddr; |
114 | __be32 rcv_saddr; | |
14c85021 ACM |
115 | __u16 dport; |
116 | __u16 num; | |
011a9261 | 117 | __be32 saddr; |
14c85021 ACM |
118 | __s16 uc_ttl; |
119 | __u16 cmsg_flags; | |
120 | struct ip_options *opt; | |
121 | __u16 sport; | |
122 | __u16 id; | |
123 | __u8 tos; | |
124 | __u8 mc_ttl; | |
125 | __u8 pmtudisc; | |
126 | __u8 recverr:1, | |
127 | is_icsk:1, | |
128 | freebind:1, | |
129 | hdrincl:1, | |
130 | mc_loop:1; | |
131 | int mc_index; | |
011a9261 | 132 | __be32 mc_addr; |
14c85021 ACM |
133 | struct ip_mc_socklist *mc_list; |
134 | struct { | |
135 | unsigned int flags; | |
136 | unsigned int fragsize; | |
137 | struct ip_options *opt; | |
138 | struct rtable *rt; | |
139 | int length; /* Total length of all frames */ | |
011a9261 | 140 | __be32 addr; |
14c85021 ACM |
141 | struct flowi fl; |
142 | } cork; | |
143 | }; | |
144 | ||
145 | #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ | |
146 | #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */ | |
147 | ||
148 | static inline struct inet_sock *inet_sk(const struct sock *sk) | |
149 | { | |
150 | return (struct inet_sock *)sk; | |
151 | } | |
152 | ||
153 | static inline void __inet_sk_copy_descendant(struct sock *sk_to, | |
154 | const struct sock *sk_from, | |
155 | const int ancestor_size) | |
156 | { | |
157 | memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1, | |
158 | sk_from->sk_prot->obj_size - ancestor_size); | |
159 | } | |
160 | #if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) | |
161 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
162 | const struct sock *sk_from) | |
163 | { | |
164 | __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock)); | |
165 | } | |
166 | #endif | |
167 | ||
168 | extern int inet_sk_rebuild_header(struct sock *sk); | |
169 | ||
170 | static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport, | |
171 | const __u32 faddr, const __u16 fport) | |
172 | { | |
173 | unsigned int h = (laddr ^ lport) ^ (faddr ^ fport); | |
174 | h ^= h >> 16; | |
175 | h ^= h >> 8; | |
176 | return h; | |
177 | } | |
178 | ||
179 | static inline int inet_sk_ehashfn(const struct sock *sk) | |
180 | { | |
181 | const struct inet_sock *inet = inet_sk(sk); | |
182 | const __u32 laddr = inet->rcv_saddr; | |
183 | const __u16 lport = inet->num; | |
184 | const __u32 faddr = inet->daddr; | |
185 | const __u16 fport = inet->dport; | |
186 | ||
187 | return inet_ehashfn(laddr, lport, faddr, fport); | |
188 | } | |
189 | ||
190 | #endif /* _INET_SOCK_H */ |