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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 | |
ac8a4810 | 34 | * @nexthop - Saved nexthop address in LSRR and SSRR |
14c85021 ACM |
35 | * @is_data - Options in __data, rather than skb |
36 | * @is_strictroute - Strict source route | |
37 | * @srr_is_hit - Packet destination addr was our one | |
38 | * @is_changed - IP checksum more not valid | |
39 | * @rr_needaddr - Need to record addr of outgoing dev | |
40 | * @ts_needtime - Need to record timestamp | |
41 | * @ts_needaddr - Need to record addr of outgoing dev | |
42 | */ | |
43 | struct ip_options { | |
3ca3c68e | 44 | __be32 faddr; |
ac8a4810 | 45 | __be32 nexthop; |
14c85021 ACM |
46 | unsigned char optlen; |
47 | unsigned char srr; | |
48 | unsigned char rr; | |
49 | unsigned char ts; | |
ef722495 | 50 | unsigned char is_strictroute:1, |
14c85021 ACM |
51 | srr_is_hit:1, |
52 | is_changed:1, | |
53 | rr_needaddr:1, | |
54 | ts_needtime:1, | |
55 | ts_needaddr:1; | |
56 | unsigned char router_alert; | |
11a03f78 | 57 | unsigned char cipso; |
14c85021 ACM |
58 | unsigned char __pad2; |
59 | unsigned char __data[0]; | |
60 | }; | |
61 | ||
f6d8bd05 ED |
62 | struct ip_options_rcu { |
63 | struct rcu_head rcu; | |
64 | struct ip_options opt; | |
65 | }; | |
66 | ||
67 | struct ip_options_data { | |
68 | struct ip_options_rcu opt; | |
69 | char data[40]; | |
70 | }; | |
14c85021 ACM |
71 | |
72 | struct inet_request_sock { | |
73 | struct request_sock req; | |
dfd56b8b | 74 | #if IS_ENABLED(CONFIG_IPV6) |
14c85021 | 75 | u16 inet6_rsk_offset; |
14c85021 | 76 | #endif |
a3116ac5 | 77 | __be16 loc_port; |
adaf345b AV |
78 | __be32 loc_addr; |
79 | __be32 rmt_addr; | |
e11be94b | 80 | __be16 rmt_port; |
45e3ff82 VN |
81 | kmemcheck_bitfield_begin(flags); |
82 | u16 snd_wscale : 4, | |
83 | rcv_wscale : 4, | |
14c85021 ACM |
84 | tstamp_ok : 1, |
85 | sack_ok : 1, | |
86 | wscale_ok : 1, | |
87 | ecn_ok : 1, | |
88ef4a5a KK |
88 | acked : 1, |
89 | no_srccheck: 1; | |
45e3ff82 | 90 | kmemcheck_bitfield_end(flags); |
f6d8bd05 | 91 | struct ip_options_rcu *opt; |
14c85021 ACM |
92 | }; |
93 | ||
94 | static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) | |
95 | { | |
96 | return (struct inet_request_sock *)sk; | |
97 | } | |
98 | ||
1470ddf7 HX |
99 | struct inet_cork { |
100 | unsigned int flags; | |
bdc712b4 | 101 | __be32 addr; |
1470ddf7 | 102 | struct ip_options *opt; |
bdc712b4 | 103 | unsigned int fragsize; |
1470ddf7 | 104 | int length; /* Total length of all frames */ |
5640f768 | 105 | struct dst_entry *dst; |
1470ddf7 HX |
106 | u8 tx_flags; |
107 | }; | |
108 | ||
bdc712b4 DM |
109 | struct inet_cork_full { |
110 | struct inet_cork base; | |
111 | struct flowi fl; | |
112 | }; | |
113 | ||
14c85021 ACM |
114 | struct ip_mc_socklist; |
115 | struct ipv6_pinfo; | |
116 | struct rtable; | |
117 | ||
118 | /** struct inet_sock - representation of INET sockets | |
119 | * | |
120 | * @sk - ancestor class | |
121 | * @pinet6 - pointer to IPv6 control block | |
c720c7e8 ED |
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 | |
14c85021 | 127 | * @uc_ttl - Unicast TTL |
c720c7e8 ED |
128 | * @inet_sport - Source port |
129 | * @inet_id - ID counter for DF pkts | |
14c85021 ACM |
130 | * @tos - TOS |
131 | * @mc_ttl - Multicasting TTL | |
132 | * @is_icsk - is this an inet_connection_sock? | |
76e21053 | 133 | * @uc_index - Unicast outgoing device index |
14c85021 ACM |
134 | * @mc_index - Multicast device index |
135 | * @mc_list - Group array | |
136 | * @cork - info to build ip hdr on each ip frag while socket is corked | |
137 | */ | |
138 | struct inet_sock { | |
139 | /* sk and pinet6 has to be the first two members of inet_sock */ | |
140 | struct sock sk; | |
dfd56b8b | 141 | #if IS_ENABLED(CONFIG_IPV6) |
14c85021 ACM |
142 | struct ipv6_pinfo *pinet6; |
143 | #endif | |
144 | /* Socket demultiplex comparisons on incoming packets. */ | |
68835aba ED |
145 | #define inet_daddr sk.__sk_common.skc_daddr |
146 | #define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr | |
ce43b03e ED |
147 | #define inet_addrpair sk.__sk_common.skc_addrpair |
148 | #define inet_dport sk.__sk_common.skc_dport | |
149 | #define inet_num sk.__sk_common.skc_num | |
150 | #define inet_portpair sk.__sk_common.skc_portpair | |
68835aba | 151 | |
c720c7e8 | 152 | __be32 inet_saddr; |
14c85021 ACM |
153 | __s16 uc_ttl; |
154 | __u16 cmsg_flags; | |
c720c7e8 ED |
155 | __be16 inet_sport; |
156 | __u16 inet_id; | |
d218d111 | 157 | |
f6d8bd05 | 158 | struct ip_options_rcu __rcu *inet_opt; |
ce43b03e | 159 | int rx_dst_ifindex; |
14c85021 | 160 | __u8 tos; |
d218d111 | 161 | __u8 min_ttl; |
14c85021 ACM |
162 | __u8 mc_ttl; |
163 | __u8 pmtudisc; | |
164 | __u8 recverr:1, | |
165 | is_icsk:1, | |
166 | freebind:1, | |
167 | hdrincl:1, | |
f5715aea | 168 | mc_loop:1, |
f771bef9 | 169 | transparent:1, |
7b2ff18e JO |
170 | mc_all:1, |
171 | nodefrag:1; | |
4c507d28 | 172 | __u8 rcv_tos; |
76e21053 | 173 | int uc_index; |
14c85021 | 174 | int mc_index; |
011a9261 | 175 | __be32 mc_addr; |
1d7138de | 176 | struct ip_mc_socklist __rcu *mc_list; |
bdc712b4 | 177 | struct inet_cork_full cork; |
14c85021 ACM |
178 | }; |
179 | ||
180 | #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ | |
181 | #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */ | |
182 | ||
183 | static inline struct inet_sock *inet_sk(const struct sock *sk) | |
184 | { | |
185 | return (struct inet_sock *)sk; | |
186 | } | |
187 | ||
188 | static inline void __inet_sk_copy_descendant(struct sock *sk_to, | |
189 | const struct sock *sk_from, | |
190 | const int ancestor_size) | |
191 | { | |
192 | memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1, | |
193 | sk_from->sk_prot->obj_size - ancestor_size); | |
194 | } | |
dfd56b8b | 195 | #if !(IS_ENABLED(CONFIG_IPV6)) |
14c85021 ACM |
196 | static inline void inet_sk_copy_descendant(struct sock *sk_to, |
197 | const struct sock *sk_from) | |
198 | { | |
199 | __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock)); | |
200 | } | |
201 | #endif | |
202 | ||
203 | extern int inet_sk_rebuild_header(struct sock *sk); | |
204 | ||
b3da2cf3 | 205 | extern u32 inet_ehash_secret; |
08dcdbf6 | 206 | extern u32 ipv6_hash_secret; |
b3da2cf3 DM |
207 | extern void build_ehash_secret(void); |
208 | ||
9f26b3ad PE |
209 | static inline unsigned int inet_ehashfn(struct net *net, |
210 | const __be32 laddr, const __u16 lport, | |
fb99c848 | 211 | const __be32 faddr, const __be16 fport) |
14c85021 | 212 | { |
7adc3830 DM |
213 | return jhash_3words((__force __u32) laddr, |
214 | (__force __u32) faddr, | |
b3da2cf3 | 215 | ((__u32) lport) << 16 | (__force __u32)fport, |
0b441916 | 216 | inet_ehash_secret + net_hash_mix(net)); |
14c85021 ACM |
217 | } |
218 | ||
219 | static inline int inet_sk_ehashfn(const struct sock *sk) | |
220 | { | |
221 | const struct inet_sock *inet = inet_sk(sk); | |
c720c7e8 ED |
222 | const __be32 laddr = inet->inet_rcv_saddr; |
223 | const __u16 lport = inet->inet_num; | |
224 | const __be32 faddr = inet->inet_daddr; | |
225 | const __be16 fport = inet->inet_dport; | |
9f26b3ad | 226 | struct net *net = sock_net(sk); |
14c85021 | 227 | |
9f26b3ad | 228 | return inet_ehashfn(net, laddr, lport, faddr, fport); |
14c85021 ACM |
229 | } |
230 | ||
ce4a7d0d ACM |
231 | static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops) |
232 | { | |
233 | struct request_sock *req = reqsk_alloc(ops); | |
45e3ff82 | 234 | struct inet_request_sock *ireq = inet_rsk(req); |
ce4a7d0d | 235 | |
45e3ff82 VN |
236 | if (req != NULL) { |
237 | kmemcheck_annotate_bitfield(ireq, flags); | |
238 | ireq->opt = NULL; | |
239 | } | |
ce4a7d0d ACM |
240 | |
241 | return req; | |
242 | } | |
243 | ||
88ef4a5a KK |
244 | static inline __u8 inet_sk_flowi_flags(const struct sock *sk) |
245 | { | |
a4daad6b DM |
246 | __u8 flags = 0; |
247 | ||
47670b76 | 248 | if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl) |
a4daad6b | 249 | flags |= FLOWI_FLAG_ANYSRC; |
a4daad6b | 250 | return flags; |
88ef4a5a KK |
251 | } |
252 | ||
14c85021 | 253 | #endif /* _INET_SOCK_H */ |