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.
19 #include <linux/config.h>
21 #include <linux/string.h>
22 #include <linux/types.h>
26 #include <net/request_sock.h>
28 /** struct ip_options - IP Options
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
46 unsigned char is_setbyuser:1,
54 unsigned char router_alert;
57 unsigned char __data[0];
60 #define optlength(opt) (sizeof(struct ip_options) + opt->optlen)
62 struct inet_request_sock {
63 struct request_sock req;
64 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
66 /* 2 bytes hole, try to pack */
78 struct ip_options *opt;
81 static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
83 return (struct inet_request_sock *)sk;
86 struct ip_mc_socklist;
90 /** struct inet_sock - representation of INET sockets
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
98 * @saddr - Sending source
99 * @uc_ttl - Unicast TTL
100 * @sport - Source port
101 * @id - ID counter for DF pkts
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
110 /* sk and pinet6 has to be the first two members of inet_sock */
112 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
113 struct ipv6_pinfo *pinet6;
115 /* Socket demultiplex comparisons on incoming packets. */
123 struct ip_options *opt;
136 struct ip_mc_socklist *mc_list;
139 unsigned int fragsize;
140 struct ip_options *opt;
142 int length; /* Total length of all frames */
148 #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
149 #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
151 static inline struct inet_sock *inet_sk(const struct sock *sk)
153 return (struct inet_sock *)sk;
156 static inline void __inet_sk_copy_descendant(struct sock *sk_to,
157 const struct sock *sk_from,
158 const int ancestor_size)
160 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
161 sk_from->sk_prot->obj_size - ancestor_size);
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)
167 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
171 extern int inet_sk_rebuild_header(struct sock *sk);
173 static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport,
174 const __u32 faddr, const __u16 fport)
176 unsigned int h = (laddr ^ lport) ^ (faddr ^ fport);
182 static inline int inet_sk_ehashfn(const struct sock *sk)
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;
190 return inet_ehashfn(laddr, lport, faddr, fport);
193 #endif /* _INET_SOCK_H */