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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 | 19 | |
45e3ff82 | 20 | #include <linux/kmemcheck.h> |
14c85021 ACM |
21 | #include <linux/string.h> |
22 | #include <linux/types.h> | |
b3da2cf3 | 23 | #include <linux/jhash.h> |
fec5e652 | 24 | #include <linux/netdevice.h> |
14c85021 ACM |
25 | |
26 | #include <net/flow.h> | |
27 | #include <net/sock.h> | |
28 | #include <net/request_sock.h> | |
0b441916 | 29 | #include <net/netns/hash.h> |
14c85021 ACM |
30 | |
31 | /** struct ip_options - IP Options | |
32 | * | |
33 | * @faddr - Saved first hop address | |
14c85021 ACM |
34 | * @is_data - Options in __data, rather than skb |
35 | * @is_strictroute - Strict source route | |
36 | * @srr_is_hit - Packet destination addr was our one | |
37 | * @is_changed - IP checksum more not valid | |
38 | * @rr_needaddr - Need to record addr of outgoing dev | |
39 | * @ts_needtime - Need to record timestamp | |
40 | * @ts_needaddr - Need to record addr of outgoing dev | |
41 | */ | |
42 | struct ip_options { | |
3ca3c68e | 43 | __be32 faddr; |
14c85021 ACM |
44 | unsigned char optlen; |
45 | unsigned char srr; | |
46 | unsigned char rr; | |
47 | unsigned char ts; | |
ef722495 | 48 | unsigned char is_strictroute:1, |
14c85021 ACM |
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; | |
11a03f78 | 55 | unsigned char cipso; |
14c85021 ACM |
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; | |
14c85021 | 66 | #endif |
a3116ac5 | 67 | __be16 loc_port; |
adaf345b AV |
68 | __be32 loc_addr; |
69 | __be32 rmt_addr; | |
e11be94b | 70 | __be16 rmt_port; |
45e3ff82 VN |
71 | kmemcheck_bitfield_begin(flags); |
72 | u16 snd_wscale : 4, | |
73 | rcv_wscale : 4, | |
14c85021 ACM |
74 | tstamp_ok : 1, |
75 | sack_ok : 1, | |
76 | wscale_ok : 1, | |
77 | ecn_ok : 1, | |
88ef4a5a KK |
78 | acked : 1, |
79 | no_srccheck: 1; | |
45e3ff82 | 80 | kmemcheck_bitfield_end(flags); |
14c85021 ACM |
81 | struct ip_options *opt; |
82 | }; | |
83 | ||
84 | static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) | |
85 | { | |
86 | return (struct inet_request_sock *)sk; | |
87 | } | |
88 | ||
89 | struct ip_mc_socklist; | |
90 | struct ipv6_pinfo; | |
91 | struct rtable; | |
92 | ||
93 | /** struct inet_sock - representation of INET sockets | |
94 | * | |
95 | * @sk - ancestor class | |
96 | * @pinet6 - pointer to IPv6 control block | |
c720c7e8 ED |
97 | * @inet_daddr - Foreign IPv4 addr |
98 | * @inet_rcv_saddr - Bound local IPv4 addr | |
99 | * @inet_dport - Destination port | |
100 | * @inet_num - Local port | |
101 | * @inet_saddr - Sending source | |
14c85021 | 102 | * @uc_ttl - Unicast TTL |
c720c7e8 ED |
103 | * @inet_sport - Source port |
104 | * @inet_id - ID counter for DF pkts | |
14c85021 ACM |
105 | * @tos - TOS |
106 | * @mc_ttl - Multicasting TTL | |
107 | * @is_icsk - is this an inet_connection_sock? | |
108 | * @mc_index - Multicast device index | |
109 | * @mc_list - Group array | |
110 | * @cork - info to build ip hdr on each ip frag while socket is corked | |
111 | */ | |
112 | struct inet_sock { | |
113 | /* sk and pinet6 has to be the first two members of inet_sock */ | |
114 | struct sock sk; | |
115 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
116 | struct ipv6_pinfo *pinet6; | |
117 | #endif | |
118 | /* Socket demultiplex comparisons on incoming packets. */ | |
68835aba ED |
119 | #define inet_daddr sk.__sk_common.skc_daddr |
120 | #define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr | |
121 | ||
c720c7e8 ED |
122 | __be16 inet_dport; |
123 | __u16 inet_num; | |
124 | __be32 inet_saddr; | |
14c85021 ACM |
125 | __s16 uc_ttl; |
126 | __u16 cmsg_flags; | |
c720c7e8 ED |
127 | __be16 inet_sport; |
128 | __u16 inet_id; | |
d218d111 SH |
129 | |
130 | struct ip_options *opt; | |
14c85021 | 131 | __u8 tos; |
d218d111 | 132 | __u8 min_ttl; |
14c85021 ACM |
133 | __u8 mc_ttl; |
134 | __u8 pmtudisc; | |
135 | __u8 recverr:1, | |
136 | is_icsk:1, | |
137 | freebind:1, | |
138 | hdrincl:1, | |
f5715aea | 139 | mc_loop:1, |
f771bef9 | 140 | transparent:1, |
7b2ff18e JO |
141 | mc_all:1, |
142 | nodefrag:1; | |
14c85021 | 143 | int mc_index; |
011a9261 | 144 | __be32 mc_addr; |
1d7138de | 145 | struct ip_mc_socklist __rcu *mc_list; |
14c85021 ACM |
146 | struct { |
147 | unsigned int flags; | |
148 | unsigned int fragsize; | |
149 | struct ip_options *opt; | |
c8cdaf99 | 150 | struct dst_entry *dst; |
14c85021 | 151 | int length; /* Total length of all frames */ |
011a9261 | 152 | __be32 addr; |
14c85021 ACM |
153 | struct flowi fl; |
154 | } cork; | |
155 | }; | |
156 | ||
157 | #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ | |
158 | #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */ | |
159 | ||
160 | static inline struct inet_sock *inet_sk(const struct sock *sk) | |
161 | { | |
162 | return (struct inet_sock *)sk; | |
163 | } | |
164 | ||
165 | static inline void __inet_sk_copy_descendant(struct sock *sk_to, | |
166 | const struct sock *sk_from, | |
167 | const int ancestor_size) | |
168 | { | |
169 | memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1, | |
170 | sk_from->sk_prot->obj_size - ancestor_size); | |
171 | } | |
172 | #if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) | |
173 | static inline void inet_sk_copy_descendant(struct sock *sk_to, | |
174 | const struct sock *sk_from) | |
175 | { | |
176 | __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock)); | |
177 | } | |
178 | #endif | |
179 | ||
180 | extern int inet_sk_rebuild_header(struct sock *sk); | |
181 | ||
b3da2cf3 DM |
182 | extern u32 inet_ehash_secret; |
183 | extern void build_ehash_secret(void); | |
184 | ||
9f26b3ad PE |
185 | static inline unsigned int inet_ehashfn(struct net *net, |
186 | const __be32 laddr, const __u16 lport, | |
fb99c848 | 187 | const __be32 faddr, const __be16 fport) |
14c85021 | 188 | { |
7adc3830 DM |
189 | return jhash_3words((__force __u32) laddr, |
190 | (__force __u32) faddr, | |
b3da2cf3 | 191 | ((__u32) lport) << 16 | (__force __u32)fport, |
0b441916 | 192 | inet_ehash_secret + net_hash_mix(net)); |
14c85021 ACM |
193 | } |
194 | ||
195 | static inline int inet_sk_ehashfn(const struct sock *sk) | |
196 | { | |
197 | const struct inet_sock *inet = inet_sk(sk); | |
c720c7e8 ED |
198 | const __be32 laddr = inet->inet_rcv_saddr; |
199 | const __u16 lport = inet->inet_num; | |
200 | const __be32 faddr = inet->inet_daddr; | |
201 | const __be16 fport = inet->inet_dport; | |
9f26b3ad | 202 | struct net *net = sock_net(sk); |
14c85021 | 203 | |
9f26b3ad | 204 | return inet_ehashfn(net, laddr, lport, faddr, fport); |
14c85021 ACM |
205 | } |
206 | ||
ce4a7d0d ACM |
207 | static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops) |
208 | { | |
209 | struct request_sock *req = reqsk_alloc(ops); | |
45e3ff82 | 210 | struct inet_request_sock *ireq = inet_rsk(req); |
ce4a7d0d | 211 | |
45e3ff82 VN |
212 | if (req != NULL) { |
213 | kmemcheck_annotate_bitfield(ireq, flags); | |
214 | ireq->opt = NULL; | |
215 | } | |
ce4a7d0d ACM |
216 | |
217 | return req; | |
218 | } | |
219 | ||
88ef4a5a KK |
220 | static inline __u8 inet_sk_flowi_flags(const struct sock *sk) |
221 | { | |
222 | return inet_sk(sk)->transparent ? FLOWI_FLAG_ANYSRC : 0; | |
223 | } | |
224 | ||
14c85021 | 225 | #endif /* _INET_SOCK_H */ |