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>
24 #include <linux/netdevice.h>
28 #include <net/request_sock.h>
29 #include <net/netns/hash.h>
31 /** struct ip_options - IP Options
33 * @faddr - Saved first hop address
34 * @nexthop - Saved nexthop address in LSRR and SSRR
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
49 unsigned char is_strictroute:1,
55 unsigned char router_alert;
58 unsigned char __data[0];
61 struct ip_options_rcu {
63 struct ip_options opt;
66 struct ip_options_data {
67 struct ip_options_rcu opt;
71 struct inet_request_sock {
72 struct request_sock req;
73 #define ir_loc_addr req.__req_common.skc_rcv_saddr
74 #define ir_rmt_addr req.__req_common.skc_daddr
75 #define ir_num req.__req_common.skc_num
76 #define ir_rmt_port req.__req_common.skc_dport
77 #define ir_v6_rmt_addr req.__req_common.skc_v6_daddr
78 #define ir_v6_loc_addr req.__req_common.skc_v6_rcv_saddr
79 #define ir_iif req.__req_common.skc_bound_dev_if
81 kmemcheck_bitfield_begin(flags);
90 kmemcheck_bitfield_end(flags);
91 struct ip_options_rcu *opt;
92 struct sk_buff *pktopts;
95 static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
97 return (struct inet_request_sock *)sk;
103 struct ip_options *opt;
104 unsigned int fragsize;
105 int length; /* Total length of all frames */
106 struct dst_entry *dst;
113 struct inet_cork_full {
114 struct inet_cork base;
118 struct ip_mc_socklist;
122 /** struct inet_sock - representation of INET sockets
124 * @sk - ancestor class
125 * @pinet6 - pointer to IPv6 control block
126 * @inet_daddr - Foreign IPv4 addr
127 * @inet_rcv_saddr - Bound local IPv4 addr
128 * @inet_dport - Destination port
129 * @inet_num - Local port
130 * @inet_saddr - Sending source
131 * @uc_ttl - Unicast TTL
132 * @inet_sport - Source port
133 * @inet_id - ID counter for DF pkts
135 * @mc_ttl - Multicasting TTL
136 * @is_icsk - is this an inet_connection_sock?
137 * @uc_index - Unicast outgoing device index
138 * @mc_index - Multicast device index
139 * @mc_list - Group array
140 * @cork - info to build ip hdr on each ip frag while socket is corked
143 /* sk and pinet6 has to be the first two members of inet_sock */
145 #if IS_ENABLED(CONFIG_IPV6)
146 struct ipv6_pinfo *pinet6;
148 /* Socket demultiplex comparisons on incoming packets. */
149 #define inet_daddr sk.__sk_common.skc_daddr
150 #define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr
151 #define inet_dport sk.__sk_common.skc_dport
152 #define inet_num sk.__sk_common.skc_num
160 struct ip_options_rcu __rcu *inet_opt;
178 struct ip_mc_socklist __rcu *mc_list;
179 struct inet_cork_full cork;
182 #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
183 #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
185 static inline struct inet_sock *inet_sk(const struct sock *sk)
187 return (struct inet_sock *)sk;
190 static inline void __inet_sk_copy_descendant(struct sock *sk_to,
191 const struct sock *sk_from,
192 const int ancestor_size)
194 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
195 sk_from->sk_prot->obj_size - ancestor_size);
197 #if !(IS_ENABLED(CONFIG_IPV6))
198 static inline void inet_sk_copy_descendant(struct sock *sk_to,
199 const struct sock *sk_from)
201 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
205 int inet_sk_rebuild_header(struct sock *sk);
207 static inline unsigned int __inet_ehashfn(const __be32 laddr,
213 return jhash_3words((__force __u32) laddr,
214 (__force __u32) faddr,
215 ((__u32) lport) << 16 | (__force __u32)fport,
219 static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops)
221 struct request_sock *req = reqsk_alloc(ops);
222 struct inet_request_sock *ireq = inet_rsk(req);
225 kmemcheck_annotate_bitfield(ireq, flags);
232 static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
236 if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
237 flags |= FLOWI_FLAG_ANYSRC;
241 #endif /* _INET_SOCK_H */