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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 | ||
c44d13d6 | 19 | #include <linux/bitops.h> |
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> |
d34ac51b | 30 | #include <net/tcp_states.h> |
14c85021 ACM |
31 | |
32 | /** struct ip_options - IP Options | |
33 | * | |
34 | * @faddr - Saved first hop address | |
ac8a4810 | 35 | * @nexthop - Saved nexthop address in LSRR and SSRR |
14c85021 ACM |
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; | |
634fb979 ED |
74 | #define ir_loc_addr req.__req_common.skc_rcv_saddr |
75 | #define ir_rmt_addr req.__req_common.skc_daddr | |
b44084c2 | 76 | #define ir_num req.__req_common.skc_num |
634fb979 ED |
77 | #define ir_rmt_port req.__req_common.skc_dport |
78 | #define ir_v6_rmt_addr req.__req_common.skc_v6_daddr | |
79 | #define ir_v6_loc_addr req.__req_common.skc_v6_rcv_saddr | |
80 | #define ir_iif req.__req_common.skc_bound_dev_if | |
33cf7c90 ED |
81 | #define ir_cookie req.__req_common.skc_cookie |
82 | #define ireq_net req.__req_common.skc_net | |
d34ac51b | 83 | #define ireq_state req.__req_common.skc_state |
1e2e0117 | 84 | #define ireq_refcnt req.__req_common.skc_refcnt |
3f66b083 | 85 | #define ireq_family req.__req_common.skc_family |
634fb979 | 86 | |
45e3ff82 VN |
87 | kmemcheck_bitfield_begin(flags); |
88 | u16 snd_wscale : 4, | |
89 | rcv_wscale : 4, | |
14c85021 ACM |
90 | tstamp_ok : 1, |
91 | sack_ok : 1, | |
92 | wscale_ok : 1, | |
93 | ecn_ok : 1, | |
88ef4a5a KK |
94 | acked : 1, |
95 | no_srccheck: 1; | |
45e3ff82 | 96 | kmemcheck_bitfield_end(flags); |
476eab82 OP |
97 | union { |
98 | struct ip_options_rcu *opt; | |
99 | struct sk_buff *pktopts; | |
100 | }; | |
84f39b08 | 101 | u32 ir_mark; |
14c85021 ACM |
102 | }; |
103 | ||
104 | static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) | |
105 | { | |
106 | return (struct inet_request_sock *)sk; | |
107 | } | |
108 | ||
84f39b08 LC |
109 | static inline u32 inet_request_mark(struct sock *sk, struct sk_buff *skb) |
110 | { | |
111 | if (!sk->sk_mark && sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept) { | |
112 | return skb->mark; | |
113 | } else { | |
114 | return sk->sk_mark; | |
115 | } | |
116 | } | |
117 | ||
1470ddf7 HX |
118 | struct inet_cork { |
119 | unsigned int flags; | |
bdc712b4 | 120 | __be32 addr; |
1470ddf7 | 121 | struct ip_options *opt; |
bdc712b4 | 122 | unsigned int fragsize; |
1470ddf7 | 123 | int length; /* Total length of all frames */ |
5640f768 | 124 | struct dst_entry *dst; |
1470ddf7 | 125 | u8 tx_flags; |
aa661581 FF |
126 | __u8 ttl; |
127 | __s16 tos; | |
128 | char priority; | |
1470ddf7 HX |
129 | }; |
130 | ||
bdc712b4 DM |
131 | struct inet_cork_full { |
132 | struct inet_cork base; | |
133 | struct flowi fl; | |
134 | }; | |
135 | ||
14c85021 ACM |
136 | struct ip_mc_socklist; |
137 | struct ipv6_pinfo; | |
138 | struct rtable; | |
139 | ||
140 | /** struct inet_sock - representation of INET sockets | |
141 | * | |
142 | * @sk - ancestor class | |
143 | * @pinet6 - pointer to IPv6 control block | |
c720c7e8 ED |
144 | * @inet_daddr - Foreign IPv4 addr |
145 | * @inet_rcv_saddr - Bound local IPv4 addr | |
146 | * @inet_dport - Destination port | |
147 | * @inet_num - Local port | |
148 | * @inet_saddr - Sending source | |
14c85021 | 149 | * @uc_ttl - Unicast TTL |
c720c7e8 ED |
150 | * @inet_sport - Source port |
151 | * @inet_id - ID counter for DF pkts | |
14c85021 ACM |
152 | * @tos - TOS |
153 | * @mc_ttl - Multicasting TTL | |
154 | * @is_icsk - is this an inet_connection_sock? | |
76e21053 | 155 | * @uc_index - Unicast outgoing device index |
14c85021 ACM |
156 | * @mc_index - Multicast device index |
157 | * @mc_list - Group array | |
158 | * @cork - info to build ip hdr on each ip frag while socket is corked | |
159 | */ | |
160 | struct inet_sock { | |
161 | /* sk and pinet6 has to be the first two members of inet_sock */ | |
162 | struct sock sk; | |
dfd56b8b | 163 | #if IS_ENABLED(CONFIG_IPV6) |
14c85021 ACM |
164 | struct ipv6_pinfo *pinet6; |
165 | #endif | |
166 | /* Socket demultiplex comparisons on incoming packets. */ | |
68835aba ED |
167 | #define inet_daddr sk.__sk_common.skc_daddr |
168 | #define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr | |
ce43b03e ED |
169 | #define inet_dport sk.__sk_common.skc_dport |
170 | #define inet_num sk.__sk_common.skc_num | |
68835aba | 171 | |
c720c7e8 | 172 | __be32 inet_saddr; |
14c85021 ACM |
173 | __s16 uc_ttl; |
174 | __u16 cmsg_flags; | |
c720c7e8 ED |
175 | __be16 inet_sport; |
176 | __u16 inet_id; | |
d218d111 | 177 | |
f6d8bd05 | 178 | struct ip_options_rcu __rcu *inet_opt; |
ce43b03e | 179 | int rx_dst_ifindex; |
14c85021 | 180 | __u8 tos; |
d218d111 | 181 | __u8 min_ttl; |
14c85021 ACM |
182 | __u8 mc_ttl; |
183 | __u8 pmtudisc; | |
184 | __u8 recverr:1, | |
185 | is_icsk:1, | |
186 | freebind:1, | |
187 | hdrincl:1, | |
f5715aea | 188 | mc_loop:1, |
f771bef9 | 189 | transparent:1, |
7b2ff18e JO |
190 | mc_all:1, |
191 | nodefrag:1; | |
4c507d28 | 192 | __u8 rcv_tos; |
224d019c | 193 | __u8 convert_csum; |
76e21053 | 194 | int uc_index; |
14c85021 | 195 | int mc_index; |
011a9261 | 196 | __be32 mc_addr; |
1d7138de | 197 | struct ip_mc_socklist __rcu *mc_list; |
bdc712b4 | 198 | struct inet_cork_full cork; |
14c85021 ACM |
199 | }; |
200 | ||
201 | #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ | |
202 | #define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */ | |
203 | ||
c44d13d6 TH |
204 | /* cmsg flags for inet */ |
205 | #define IP_CMSG_PKTINFO BIT(0) | |
206 | #define IP_CMSG_TTL BIT(1) | |
207 | #define IP_CMSG_TOS BIT(2) | |
208 | #define IP_CMSG_RECVOPTS BIT(3) | |
209 | #define IP_CMSG_RETOPTS BIT(4) | |
210 | #define IP_CMSG_PASSSEC BIT(5) | |
211 | #define IP_CMSG_ORIGDSTADDR BIT(6) | |
ad6f939a | 212 | #define IP_CMSG_CHECKSUM BIT(7) |
c44d13d6 | 213 | |
14c85021 ACM |
214 | static inline struct inet_sock *inet_sk(const struct sock *sk) |
215 | { | |
216 | return (struct inet_sock *)sk; | |
217 | } | |
218 | ||
219 | static inline void __inet_sk_copy_descendant(struct sock *sk_to, | |
220 | const struct sock *sk_from, | |
221 | const int ancestor_size) | |
222 | { | |
223 | memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1, | |
224 | sk_from->sk_prot->obj_size - ancestor_size); | |
225 | } | |
dfd56b8b | 226 | #if !(IS_ENABLED(CONFIG_IPV6)) |
14c85021 ACM |
227 | static inline void inet_sk_copy_descendant(struct sock *sk_to, |
228 | const struct sock *sk_from) | |
229 | { | |
230 | __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock)); | |
231 | } | |
232 | #endif | |
233 | ||
1fd51155 | 234 | int inet_sk_rebuild_header(struct sock *sk); |
14c85021 | 235 | |
65cd8033 HFS |
236 | static inline unsigned int __inet_ehashfn(const __be32 laddr, |
237 | const __u16 lport, | |
238 | const __be32 faddr, | |
239 | const __be16 fport, | |
240 | u32 initval) | |
14c85021 | 241 | { |
7adc3830 DM |
242 | return jhash_3words((__force __u32) laddr, |
243 | (__force __u32) faddr, | |
b3da2cf3 | 244 | ((__u32) lport) << 16 | (__force __u32)fport, |
65cd8033 | 245 | initval); |
14c85021 ACM |
246 | } |
247 | ||
ce4a7d0d ACM |
248 | static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops) |
249 | { | |
250 | struct request_sock *req = reqsk_alloc(ops); | |
45e3ff82 | 251 | struct inet_request_sock *ireq = inet_rsk(req); |
ce4a7d0d | 252 | |
45e3ff82 VN |
253 | if (req != NULL) { |
254 | kmemcheck_annotate_bitfield(ireq, flags); | |
255 | ireq->opt = NULL; | |
bd337c58 | 256 | atomic64_set(&ireq->ir_cookie, 0); |
d34ac51b | 257 | ireq->ireq_state = TCP_NEW_SYN_RECV; |
45e3ff82 | 258 | } |
ce4a7d0d ACM |
259 | |
260 | return req; | |
261 | } | |
262 | ||
88ef4a5a KK |
263 | static inline __u8 inet_sk_flowi_flags(const struct sock *sk) |
264 | { | |
a4daad6b DM |
265 | __u8 flags = 0; |
266 | ||
47670b76 | 267 | if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl) |
a4daad6b | 268 | flags |= FLOWI_FLAG_ANYSRC; |
a4daad6b | 269 | return flags; |
88ef4a5a KK |
270 | } |
271 | ||
224d019c TH |
272 | static inline void inet_inc_convert_csum(struct sock *sk) |
273 | { | |
274 | inet_sk(sk)->convert_csum++; | |
275 | } | |
276 | ||
277 | static inline void inet_dec_convert_csum(struct sock *sk) | |
278 | { | |
279 | if (inet_sk(sk)->convert_csum > 0) | |
280 | inet_sk(sk)->convert_csum--; | |
281 | } | |
282 | ||
283 | static inline bool inet_get_convert_csum(struct sock *sk) | |
284 | { | |
285 | return !!inet_sk(sk)->convert_csum; | |
286 | } | |
287 | ||
14c85021 | 288 | #endif /* _INET_SOCK_H */ |