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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
19
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>
25
26#include <net/flow.h>
27#include <net/sock.h>
28#include <net/request_sock.h>
29#include <net/netns/hash.h>
30
31/** struct ip_options - IP Options
32 *
33 * @faddr - Saved first hop address
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 */
42struct ip_options {
43 __be32 faddr;
44 unsigned char optlen;
45 unsigned char srr;
46 unsigned char rr;
47 unsigned char ts;
48 unsigned char is_strictroute:1,
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;
55 unsigned char cipso;
56 unsigned char __pad2;
57 unsigned char __data[0];
58};
59
60struct ip_options_rcu {
61 struct rcu_head rcu;
62 struct ip_options opt;
63};
64
65struct ip_options_data {
66 struct ip_options_rcu opt;
67 char data[40];
68};
69
70struct inet_request_sock {
71 struct request_sock req;
72#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
73 u16 inet6_rsk_offset;
74#endif
75 __be16 loc_port;
76 __be32 loc_addr;
77 __be32 rmt_addr;
78 __be16 rmt_port;
79 kmemcheck_bitfield_begin(flags);
80 u16 snd_wscale : 4,
81 rcv_wscale : 4,
82 tstamp_ok : 1,
83 sack_ok : 1,
84 wscale_ok : 1,
85 ecn_ok : 1,
86 acked : 1,
87 no_srccheck: 1;
88 kmemcheck_bitfield_end(flags);
89 struct ip_options_rcu *opt;
90};
91
92static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
93{
94 return (struct inet_request_sock *)sk;
95}
96
97struct inet_cork {
98 unsigned int flags;
99 __be32 addr;
100 struct ip_options *opt;
101 unsigned int fragsize;
102 struct dst_entry *dst;
103 int length; /* Total length of all frames */
104 struct page *page;
105 u32 off;
106 u8 tx_flags;
107};
108
109struct inet_cork_full {
110 struct inet_cork base;
111 struct flowi fl;
112};
113
114struct ip_mc_socklist;
115struct ipv6_pinfo;
116struct rtable;
117
118/** struct inet_sock - representation of INET sockets
119 *
120 * @sk - ancestor class
121 * @pinet6 - pointer to IPv6 control block
122 * @inet_daddr - Foreign IPv4 addr
123 * @inet_rcv_saddr - Bound local IPv4 addr
124 * @inet_dport - Destination port
125 * @inet_num - Local port
126 * @inet_saddr - Sending source
127 * @uc_ttl - Unicast TTL
128 * @inet_sport - Source port
129 * @inet_id - ID counter for DF pkts
130 * @tos - TOS
131 * @mc_ttl - Multicasting TTL
132 * @is_icsk - is this an inet_connection_sock?
133 * @mc_index - Multicast device index
134 * @mc_list - Group array
135 * @cork - info to build ip hdr on each ip frag while socket is corked
136 */
137struct inet_sock {
138 /* sk and pinet6 has to be the first two members of inet_sock */
139 struct sock sk;
140#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
141 struct ipv6_pinfo *pinet6;
142#endif
143 /* Socket demultiplex comparisons on incoming packets. */
144#define inet_daddr sk.__sk_common.skc_daddr
145#define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr
146
147 __be16 inet_dport;
148 __u16 inet_num;
149 __be32 inet_saddr;
150 __s16 uc_ttl;
151 __u16 cmsg_flags;
152 __be16 inet_sport;
153 __u16 inet_id;
154
155 struct ip_options_rcu __rcu *inet_opt;
156 __u8 tos;
157 __u8 min_ttl;
158 __u8 mc_ttl;
159 __u8 pmtudisc;
160 __u8 recverr:1,
161 is_icsk:1,
162 freebind:1,
163 hdrincl:1,
164 mc_loop:1,
165 transparent:1,
166 mc_all:1,
167 nodefrag:1;
168 int mc_index;
169 __be32 mc_addr;
170 struct ip_mc_socklist __rcu *mc_list;
171 struct inet_cork_full cork;
172};
173
174#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
175#define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
176
177static inline struct inet_sock *inet_sk(const struct sock *sk)
178{
179 return (struct inet_sock *)sk;
180}
181
182static inline void __inet_sk_copy_descendant(struct sock *sk_to,
183 const struct sock *sk_from,
184 const int ancestor_size)
185{
186 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
187 sk_from->sk_prot->obj_size - ancestor_size);
188}
189#if !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE))
190static inline void inet_sk_copy_descendant(struct sock *sk_to,
191 const struct sock *sk_from)
192{
193 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
194}
195#endif
196
197extern int inet_sk_rebuild_header(struct sock *sk);
198
199extern u32 inet_ehash_secret;
200extern void build_ehash_secret(void);
201
202static inline unsigned int inet_ehashfn(struct net *net,
203 const __be32 laddr, const __u16 lport,
204 const __be32 faddr, const __be16 fport)
205{
206 return jhash_3words((__force __u32) laddr,
207 (__force __u32) faddr,
208 ((__u32) lport) << 16 | (__force __u32)fport,
209 inet_ehash_secret + net_hash_mix(net));
210}
211
212static inline int inet_sk_ehashfn(const struct sock *sk)
213{
214 const struct inet_sock *inet = inet_sk(sk);
215 const __be32 laddr = inet->inet_rcv_saddr;
216 const __u16 lport = inet->inet_num;
217 const __be32 faddr = inet->inet_daddr;
218 const __be16 fport = inet->inet_dport;
219 struct net *net = sock_net(sk);
220
221 return inet_ehashfn(net, laddr, lport, faddr, fport);
222}
223
224static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops)
225{
226 struct request_sock *req = reqsk_alloc(ops);
227 struct inet_request_sock *ireq = inet_rsk(req);
228
229 if (req != NULL) {
230 kmemcheck_annotate_bitfield(ireq, flags);
231 ireq->opt = NULL;
232 }
233
234 return req;
235}
236
237static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
238{
239 __u8 flags = 0;
240
241 if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
242 flags |= FLOWI_FLAG_ANYSRC;
243 if (sk->sk_protocol == IPPROTO_TCP)
244 flags |= FLOWI_FLAG_PRECOW_METRICS;
245 return flags;
246}
247
248#endif /* _INET_SOCK_H */
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
19
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>
25
26#include <net/flow.h>
27#include <net/sock.h>
28#include <net/request_sock.h>
29#include <net/netns/hash.h>
30
31/** struct ip_options - IP Options
32 *
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
41 */
42struct ip_options {
43 __be32 faddr;
44 __be32 nexthop;
45 unsigned char optlen;
46 unsigned char srr;
47 unsigned char rr;
48 unsigned char ts;
49 unsigned char is_strictroute:1,
50 srr_is_hit:1,
51 is_changed:1,
52 rr_needaddr:1,
53 ts_needtime:1,
54 ts_needaddr:1;
55 unsigned char router_alert;
56 unsigned char cipso;
57 unsigned char __pad2;
58 unsigned char __data[0];
59};
60
61struct ip_options_rcu {
62 struct rcu_head rcu;
63 struct ip_options opt;
64};
65
66struct ip_options_data {
67 struct ip_options_rcu opt;
68 char data[40];
69};
70
71struct 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
80
81 kmemcheck_bitfield_begin(flags);
82 u16 snd_wscale : 4,
83 rcv_wscale : 4,
84 tstamp_ok : 1,
85 sack_ok : 1,
86 wscale_ok : 1,
87 ecn_ok : 1,
88 acked : 1,
89 no_srccheck: 1;
90 kmemcheck_bitfield_end(flags);
91 struct ip_options_rcu *opt;
92 struct sk_buff *pktopts;
93};
94
95static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
96{
97 return (struct inet_request_sock *)sk;
98}
99
100struct inet_cork {
101 unsigned int flags;
102 __be32 addr;
103 struct ip_options *opt;
104 unsigned int fragsize;
105 int length; /* Total length of all frames */
106 struct dst_entry *dst;
107 u8 tx_flags;
108 __u8 ttl;
109 __s16 tos;
110 char priority;
111};
112
113struct inet_cork_full {
114 struct inet_cork base;
115 struct flowi fl;
116};
117
118struct ip_mc_socklist;
119struct ipv6_pinfo;
120struct rtable;
121
122/** struct inet_sock - representation of INET sockets
123 *
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
134 * @tos - TOS
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
141 */
142struct inet_sock {
143 /* sk and pinet6 has to be the first two members of inet_sock */
144 struct sock sk;
145#if IS_ENABLED(CONFIG_IPV6)
146 struct ipv6_pinfo *pinet6;
147#endif
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
153
154 __be32 inet_saddr;
155 __s16 uc_ttl;
156 __u16 cmsg_flags;
157 __be16 inet_sport;
158 __u16 inet_id;
159
160 struct ip_options_rcu __rcu *inet_opt;
161 int rx_dst_ifindex;
162 __u8 tos;
163 __u8 min_ttl;
164 __u8 mc_ttl;
165 __u8 pmtudisc;
166 __u8 recverr:1,
167 is_icsk:1,
168 freebind:1,
169 hdrincl:1,
170 mc_loop:1,
171 transparent:1,
172 mc_all:1,
173 nodefrag:1;
174 __u8 rcv_tos;
175 int uc_index;
176 int mc_index;
177 __be32 mc_addr;
178 struct ip_mc_socklist __rcu *mc_list;
179 struct inet_cork_full cork;
180};
181
182#define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */
183#define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */
184
185static inline struct inet_sock *inet_sk(const struct sock *sk)
186{
187 return (struct inet_sock *)sk;
188}
189
190static inline void __inet_sk_copy_descendant(struct sock *sk_to,
191 const struct sock *sk_from,
192 const int ancestor_size)
193{
194 memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
195 sk_from->sk_prot->obj_size - ancestor_size);
196}
197#if !(IS_ENABLED(CONFIG_IPV6))
198static inline void inet_sk_copy_descendant(struct sock *sk_to,
199 const struct sock *sk_from)
200{
201 __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
202}
203#endif
204
205int inet_sk_rebuild_header(struct sock *sk);
206
207static inline unsigned int __inet_ehashfn(const __be32 laddr,
208 const __u16 lport,
209 const __be32 faddr,
210 const __be16 fport,
211 u32 initval)
212{
213 return jhash_3words((__force __u32) laddr,
214 (__force __u32) faddr,
215 ((__u32) lport) << 16 | (__force __u32)fport,
216 initval);
217}
218
219static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops)
220{
221 struct request_sock *req = reqsk_alloc(ops);
222 struct inet_request_sock *ireq = inet_rsk(req);
223
224 if (req != NULL) {
225 kmemcheck_annotate_bitfield(ireq, flags);
226 ireq->opt = NULL;
227 }
228
229 return req;
230}
231
232static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
233{
234 __u8 flags = 0;
235
236 if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
237 flags |= FLOWI_FLAG_ANYSRC;
238 return flags;
239}
240
241#endif /* _INET_SOCK_H */