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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/net/inet_sock.h
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.
6 * Definitions for inet_sock
8 * Authors: Many, reorganised here by
9 * Arnaldo Carvalho de Melo <acme@mandriva.com>
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.
20 #include <linux/kmemcheck.h>
21 #include <linux/string.h>
22 #include <linux/types.h>
23 #include <linux/jhash.h>
27 #include <net/request_sock.h>
28 #include <net/netns/hash.h>
30 /** struct ip_options - IP Options
32 * @faddr - Saved first hop address
33 * @is_data - Options in __data, rather than skb
34 * @is_strictroute - Strict source route
35 * @srr_is_hit - Packet destination addr was our one
36 * @is_changed - IP checksum more not valid
37 * @rr_needaddr - Need to record addr of outgoing dev
38 * @ts_needtime - Need to record timestamp
39 * @ts_needaddr - Need to record addr of outgoing dev
47 unsigned char is_strictroute
:1,
53 unsigned char router_alert
;
56 unsigned char __data
[0];
59 #define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
61 struct inet_request_sock
{
62 struct request_sock req
;
63 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
70 kmemcheck_bitfield_begin(flags
);
79 kmemcheck_bitfield_end(flags
);
80 struct ip_options
*opt
;
83 static inline struct inet_request_sock
*inet_rsk(const struct request_sock
*sk
)
85 return (struct inet_request_sock
*)sk
;
88 struct ip_mc_socklist
;
92 /** struct inet_sock - representation of INET sockets
94 * @sk - ancestor class
95 * @pinet6 - pointer to IPv6 control block
96 * @daddr - Foreign IPv4 addr
97 * @rcv_saddr - Bound local IPv4 addr
98 * @dport - Destination port
100 * @saddr - Sending source
101 * @uc_ttl - Unicast TTL
102 * @sport - Source port
103 * @id - ID counter for DF pkts
105 * @mc_ttl - Multicasting TTL
106 * @is_icsk - is this an inet_connection_sock?
107 * @mc_index - Multicast device index
108 * @mc_list - Group array
109 * @cork - info to build ip hdr on each ip frag while socket is corked
112 /* sk and pinet6 has to be the first two members of inet_sock */
114 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
115 struct ipv6_pinfo
*pinet6
;
117 /* Socket demultiplex comparisons on incoming packets. */
125 struct ip_options
*opt
;
140 struct ip_mc_socklist
*mc_list
;
143 unsigned int fragsize
;
144 struct ip_options
*opt
;
145 struct dst_entry
*dst
;
146 int length
; /* Total length of all frames */
152 #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
153 #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
155 static inline struct inet_sock
*inet_sk(const struct sock
*sk
)
157 return (struct inet_sock
*)sk
;
160 static inline void __inet_sk_copy_descendant(struct sock
*sk_to
,
161 const struct sock
*sk_from
,
162 const int ancestor_size
)
164 memcpy(inet_sk(sk_to
) + 1, inet_sk(sk_from
) + 1,
165 sk_from
->sk_prot
->obj_size
- ancestor_size
);
167 #if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE))
168 static inline void inet_sk_copy_descendant(struct sock
*sk_to
,
169 const struct sock
*sk_from
)
171 __inet_sk_copy_descendant(sk_to
, sk_from
, sizeof(struct inet_sock
));
175 extern int inet_sk_rebuild_header(struct sock
*sk
);
177 extern u32 inet_ehash_secret
;
178 extern void build_ehash_secret(void);
180 static inline unsigned int inet_ehashfn(struct net
*net
,
181 const __be32 laddr
, const __u16 lport
,
182 const __be32 faddr
, const __be16 fport
)
184 return jhash_3words((__force __u32
) laddr
,
185 (__force __u32
) faddr
,
186 ((__u32
) lport
) << 16 | (__force __u32
)fport
,
187 inet_ehash_secret
+ net_hash_mix(net
));
190 static inline int inet_sk_ehashfn(const struct sock
*sk
)
192 const struct inet_sock
*inet
= inet_sk(sk
);
193 const __be32 laddr
= inet
->rcv_saddr
;
194 const __u16 lport
= inet
->num
;
195 const __be32 faddr
= inet
->daddr
;
196 const __be16 fport
= inet
->dport
;
197 struct net
*net
= sock_net(sk
);
199 return inet_ehashfn(net
, laddr
, lport
, faddr
, fport
);
202 static inline struct request_sock
*inet_reqsk_alloc(struct request_sock_ops
*ops
)
204 struct request_sock
*req
= reqsk_alloc(ops
);
205 struct inet_request_sock
*ireq
= inet_rsk(req
);
208 kmemcheck_annotate_bitfield(ireq
, flags
);
215 static inline __u8
inet_sk_flowi_flags(const struct sock
*sk
)
217 return inet_sk(sk
)->transparent
? FLOWI_FLAG_ANYSRC
: 0;
220 #endif /* _INET_SOCK_H */