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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> | |
b3da2cf3 | 22 | #include <linux/jhash.h> |
14c85021 ACM |
23 | |
24 | #include <net/flow.h> | |
25 | #include <net/sock.h> | |
26 | #include <net/request_sock.h> | |
0b441916 | 27 | #include <net/netns/hash.h> |
14c85021 ACM |
28 | |
29 | /** struct ip_options - IP Options | |
30 | * | |
31 | * @faddr - Saved first hop address | |
14c85021 ACM |
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 { | |
3ca3c68e | 41 | __be32 faddr; |
14c85021 ACM |
42 | unsigned char optlen; |
43 | unsigned char srr; | |
44 | unsigned char rr; | |
45 | unsigned char ts; | |
ef722495 | 46 | unsigned char is_strictroute:1, |
14c85021 ACM |
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; | |
11a03f78 | 53 | unsigned char cipso; |
14c85021 ACM |
54 | unsigned char __pad2; |
55 | unsigned char __data[0]; | |
56 | }; | |
57 | ||
58 | #define optlength(opt) (sizeof(struct ip_options) + opt->optlen) | |
59 | ||
60 | struct inet_request_sock { | |
61 | struct request_sock req; | |
62 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
63 | u16 inet6_rsk_offset; | |
14c85021 | 64 | #endif |
a3116ac5 | 65 | __be16 loc_port; |
adaf345b AV |
66 | __be32 loc_addr; |
67 | __be32 rmt_addr; | |
e11be94b | 68 | __be16 rmt_port; |
14c85021 ACM |
69 | u16 snd_wscale : 4, |
70 | rcv_wscale : 4, | |
71 | tstamp_ok : 1, | |
72 | sack_ok : 1, | |
73 | wscale_ok : 1, | |
74 | ecn_ok : 1, | |
88ef4a5a KK |
75 | acked : 1, |
76 | no_srccheck: 1; | |
14c85021 ACM |
77 | struct ip_options *opt; |
78 | }; | |
79 | ||
80 | static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) | |
81 | { | |
82 | return (struct inet_request_sock *)sk; | |
83 | } | |
84 | ||
85 | struct ip_mc_socklist; | |
86 | struct ipv6_pinfo; | |
87 | struct rtable; | |
88 | ||
89 | /** struct inet_sock - representation of INET sockets | |
90 | * | |
91 | * @sk - ancestor class | |
92 | * @pinet6 - pointer to IPv6 control block | |
93 | * @daddr - Foreign IPv4 addr | |
94 | * @rcv_saddr - Bound local IPv4 addr | |
95 | * @dport - Destination port | |
96 | * @num - Local port | |
97 | * @saddr - Sending source | |
98 | * @uc_ttl - Unicast TTL | |
99 | * @sport - Source port | |
100 | * @id - ID counter for DF pkts | |
101 | * @tos - TOS | |
102 | * @mc_ttl - Multicasting TTL | |
103 | * @is_icsk - is this an inet_connection_sock? | |
104 | * @mc_index - Multicast device index | |
105 | * @mc_list - Group array | |
106 | * @cork - info to build ip hdr on each ip frag while socket is corked | |
107 | */ | |
108 | struct inet_sock { | |
109 | /* sk and pinet6 has to be the first two members of inet_sock */ | |
110 | struct sock sk; | |
111 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
112 | struct ipv6_pinfo *pinet6; | |
113 | #endif | |
114 | /* Socket demultiplex comparisons on incoming packets. */ | |
011a9261 AV |
115 | __be32 daddr; |
116 | __be32 rcv_saddr; | |
2816e128 | 117 | __be16 dport; |
14c85021 | 118 | __u16 num; |
011a9261 | 119 | __be32 saddr; |
14c85021 ACM |
120 | __s16 uc_ttl; |
121 | __u16 cmsg_flags; | |
122 | struct ip_options *opt; | |
2816e128 | 123 | __be16 sport; |
14c85021 ACM |
124 | __u16 id; |
125 | __u8 tos; | |
126 | __u8 mc_ttl; | |
127 | __u8 pmtudisc; | |
128 | __u8 recverr:1, | |
129 | is_icsk:1, | |
130 | freebind:1, | |
131 | hdrincl:1, | |
f5715aea KK |
132 | mc_loop:1, |
133 | transparent:1; | |
14c85021 | 134 | int mc_index; |
011a9261 | 135 | __be32 mc_addr; |
14c85021 ACM |
136 | struct ip_mc_socklist *mc_list; |
137 | struct { | |
138 | unsigned int flags; | |
139 | unsigned int fragsize; | |
140 | struct ip_options *opt; | |
c8cdaf99 | 141 | struct dst_entry *dst; |
14c85021 | 142 | int length; /* Total length of all frames */ |
011a9261 | 143 | __be32 addr; |
14c85021 ACM |
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 | ||
b3da2cf3 DM |
173 | extern u32 inet_ehash_secret; |
174 | extern void build_ehash_secret(void); | |
175 | ||
9f26b3ad PE |
176 | static inline unsigned int inet_ehashfn(struct net *net, |
177 | const __be32 laddr, const __u16 lport, | |
fb99c848 | 178 | const __be32 faddr, const __be16 fport) |
14c85021 | 179 | { |
7adc3830 DM |
180 | return jhash_3words((__force __u32) laddr, |
181 | (__force __u32) faddr, | |
b3da2cf3 | 182 | ((__u32) lport) << 16 | (__force __u32)fport, |
0b441916 | 183 | inet_ehash_secret + net_hash_mix(net)); |
14c85021 ACM |
184 | } |
185 | ||
186 | static inline int inet_sk_ehashfn(const struct sock *sk) | |
187 | { | |
188 | const struct inet_sock *inet = inet_sk(sk); | |
fb99c848 | 189 | const __be32 laddr = inet->rcv_saddr; |
14c85021 | 190 | const __u16 lport = inet->num; |
fb99c848 AV |
191 | const __be32 faddr = inet->daddr; |
192 | const __be16 fport = inet->dport; | |
9f26b3ad | 193 | struct net *net = sock_net(sk); |
14c85021 | 194 | |
9f26b3ad | 195 | return inet_ehashfn(net, laddr, lport, faddr, fport); |
14c85021 ACM |
196 | } |
197 | ||
ce4a7d0d ACM |
198 | static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops) |
199 | { | |
200 | struct request_sock *req = reqsk_alloc(ops); | |
201 | ||
202 | if (req != NULL) | |
203 | inet_rsk(req)->opt = NULL; | |
204 | ||
205 | return req; | |
206 | } | |
207 | ||
88ef4a5a KK |
208 | static inline __u8 inet_sk_flowi_flags(const struct sock *sk) |
209 | { | |
210 | return inet_sk(sk)->transparent ? FLOWI_FLAG_ANYSRC : 0; | |
211 | } | |
212 | ||
14c85021 | 213 | #endif /* _INET_SOCK_H */ |