Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 19 | |
Vegard Nossum | 45e3ff8 | 2008-09-09 06:43:12 +0200 | [diff] [blame] | 20 | #include <linux/kmemcheck.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 21 | #include <linux/string.h> |
| 22 | #include <linux/types.h> |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 23 | #include <linux/jhash.h> |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 24 | #include <linux/netdevice.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 25 | |
| 26 | #include <net/flow.h> |
| 27 | #include <net/sock.h> |
| 28 | #include <net/request_sock.h> |
Pavel Emelyanov | 0b44191 | 2008-06-16 17:14:11 -0700 | [diff] [blame] | 29 | #include <net/netns/hash.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 30 | |
| 31 | /** struct ip_options - IP Options |
| 32 | * |
| 33 | * @faddr - Saved first hop address |
Li Wei | ac8a481 | 2011-11-22 23:33:10 +0000 | [diff] [blame] | 34 | * @nexthop - Saved nexthop address in LSRR and SSRR |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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 { |
Al Viro | 3ca3c68 | 2006-09-27 18:28:07 -0700 | [diff] [blame] | 44 | __be32 faddr; |
Li Wei | ac8a481 | 2011-11-22 23:33:10 +0000 | [diff] [blame] | 45 | __be32 nexthop; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 46 | unsigned char optlen; |
| 47 | unsigned char srr; |
| 48 | unsigned char rr; |
| 49 | unsigned char ts; |
Denis V. Lunev | ef72249 | 2008-03-22 16:35:29 -0700 | [diff] [blame] | 50 | unsigned char is_strictroute:1, |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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; |
Paul Moore | 11a03f7 | 2006-08-03 16:46:20 -0700 | [diff] [blame] | 57 | unsigned char cipso; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 58 | unsigned char __pad2; |
| 59 | unsigned char __data[0]; |
| 60 | }; |
| 61 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 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 | }; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 71 | |
| 72 | struct inet_request_sock { |
| 73 | struct request_sock req; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 74 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 75 | u16 inet6_rsk_offset; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 76 | #endif |
KOVACS Krisztian | a3116ac5 | 2008-10-01 07:46:49 -0700 | [diff] [blame] | 77 | __be16 loc_port; |
Al Viro | adaf345 | 2006-09-27 18:27:13 -0700 | [diff] [blame] | 78 | __be32 loc_addr; |
| 79 | __be32 rmt_addr; |
Al Viro | e11be94 | 2006-09-27 18:35:29 -0700 | [diff] [blame] | 80 | __be16 rmt_port; |
Vegard Nossum | 45e3ff8 | 2008-09-09 06:43:12 +0200 | [diff] [blame] | 81 | kmemcheck_bitfield_begin(flags); |
| 82 | u16 snd_wscale : 4, |
| 83 | rcv_wscale : 4, |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 84 | tstamp_ok : 1, |
| 85 | sack_ok : 1, |
| 86 | wscale_ok : 1, |
| 87 | ecn_ok : 1, |
KOVACS Krisztian | 88ef4a5 | 2008-10-01 07:41:00 -0700 | [diff] [blame] | 88 | acked : 1, |
| 89 | no_srccheck: 1; |
Vegard Nossum | 45e3ff8 | 2008-09-09 06:43:12 +0200 | [diff] [blame] | 90 | kmemcheck_bitfield_end(flags); |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 91 | struct ip_options_rcu *opt; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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 | |
Herbert Xu | 1470ddf | 2011-03-01 02:36:47 +0000 | [diff] [blame] | 99 | struct inet_cork { |
| 100 | unsigned int flags; |
David S. Miller | bdc712b | 2011-05-06 15:02:07 -0700 | [diff] [blame] | 101 | __be32 addr; |
Herbert Xu | 1470ddf | 2011-03-01 02:36:47 +0000 | [diff] [blame] | 102 | struct ip_options *opt; |
David S. Miller | bdc712b | 2011-05-06 15:02:07 -0700 | [diff] [blame] | 103 | unsigned int fragsize; |
Herbert Xu | 1470ddf | 2011-03-01 02:36:47 +0000 | [diff] [blame] | 104 | int length; /* Total length of all frames */ |
Eric Dumazet | 5640f76 | 2012-09-23 23:04:42 +0000 | [diff] [blame] | 105 | struct dst_entry *dst; |
Herbert Xu | 1470ddf | 2011-03-01 02:36:47 +0000 | [diff] [blame] | 106 | u8 tx_flags; |
| 107 | }; |
| 108 | |
David S. Miller | bdc712b | 2011-05-06 15:02:07 -0700 | [diff] [blame] | 109 | struct inet_cork_full { |
| 110 | struct inet_cork base; |
| 111 | struct flowi fl; |
| 112 | }; |
| 113 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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 |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 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 |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 127 | * @uc_ttl - Unicast TTL |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 128 | * @inet_sport - Source port |
| 129 | * @inet_id - ID counter for DF pkts |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 130 | * @tos - TOS |
| 131 | * @mc_ttl - Multicasting TTL |
| 132 | * @is_icsk - is this an inet_connection_sock? |
Erich E. Hoover | 76e2105 | 2012-02-08 09:11:07 +0000 | [diff] [blame] | 133 | * @uc_index - Unicast outgoing device index |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 141 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 142 | struct ipv6_pinfo *pinet6; |
| 143 | #endif |
| 144 | /* Socket demultiplex comparisons on incoming packets. */ |
Eric Dumazet | 68835ab | 2010-11-30 19:04:07 +0000 | [diff] [blame] | 145 | #define inet_daddr sk.__sk_common.skc_daddr |
| 146 | #define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr |
Eric Dumazet | ce43b03 | 2012-11-30 09:49:27 +0000 | [diff] [blame] | 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 |
Eric Dumazet | 68835ab | 2010-11-30 19:04:07 +0000 | [diff] [blame] | 151 | |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 152 | __be32 inet_saddr; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 153 | __s16 uc_ttl; |
| 154 | __u16 cmsg_flags; |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 155 | __be16 inet_sport; |
| 156 | __u16 inet_id; |
Stephen Hemminger | d218d11 | 2010-01-11 16:28:01 -0800 | [diff] [blame] | 157 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 158 | struct ip_options_rcu __rcu *inet_opt; |
Eric Dumazet | ce43b03 | 2012-11-30 09:49:27 +0000 | [diff] [blame] | 159 | int rx_dst_ifindex; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 160 | __u8 tos; |
Stephen Hemminger | d218d11 | 2010-01-11 16:28:01 -0800 | [diff] [blame] | 161 | __u8 min_ttl; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 162 | __u8 mc_ttl; |
| 163 | __u8 pmtudisc; |
| 164 | __u8 recverr:1, |
| 165 | is_icsk:1, |
| 166 | freebind:1, |
| 167 | hdrincl:1, |
KOVACS Krisztian | f5715ae | 2008-10-01 07:30:02 -0700 | [diff] [blame] | 168 | mc_loop:1, |
Nivedita Singhvi | f771bef | 2009-05-28 07:00:46 +0000 | [diff] [blame] | 169 | transparent:1, |
Jiri Olsa | 7b2ff18 | 2010-06-15 01:07:31 +0000 | [diff] [blame] | 170 | mc_all:1, |
| 171 | nodefrag:1; |
Jiri Benc | 4c507d2 | 2012-02-09 09:35:49 +0000 | [diff] [blame] | 172 | __u8 rcv_tos; |
Erich E. Hoover | 76e2105 | 2012-02-08 09:11:07 +0000 | [diff] [blame] | 173 | int uc_index; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 174 | int mc_index; |
Al Viro | 011a926 | 2006-09-26 21:27:35 -0700 | [diff] [blame] | 175 | __be32 mc_addr; |
Eric Dumazet | 1d7138d | 2010-11-12 05:46:50 +0000 | [diff] [blame] | 176 | struct ip_mc_socklist __rcu *mc_list; |
David S. Miller | bdc712b | 2011-05-06 15:02:07 -0700 | [diff] [blame] | 177 | struct inet_cork_full cork; |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 195 | #if !(IS_ENABLED(CONFIG_IPV6)) |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 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 | |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 205 | extern u32 inet_ehash_secret; |
Eric Dumazet | 08dcdbf | 2013-02-21 12:18:52 +0000 | [diff] [blame] | 206 | extern u32 ipv6_hash_secret; |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 207 | extern void build_ehash_secret(void); |
| 208 | |
Pavel Emelyanov | 9f26b3a | 2008-06-16 17:13:27 -0700 | [diff] [blame] | 209 | static inline unsigned int inet_ehashfn(struct net *net, |
| 210 | const __be32 laddr, const __u16 lport, |
Al Viro | fb99c84 | 2006-09-27 18:43:33 -0700 | [diff] [blame] | 211 | const __be32 faddr, const __be16 fport) |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 212 | { |
David S. Miller | 7adc383 | 2008-03-04 14:28:41 -0800 | [diff] [blame] | 213 | return jhash_3words((__force __u32) laddr, |
| 214 | (__force __u32) faddr, |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 215 | ((__u32) lport) << 16 | (__force __u32)fport, |
Pavel Emelyanov | 0b44191 | 2008-06-16 17:14:11 -0700 | [diff] [blame] | 216 | inet_ehash_secret + net_hash_mix(net)); |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | static inline int inet_sk_ehashfn(const struct sock *sk) |
| 220 | { |
| 221 | const struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 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; |
Pavel Emelyanov | 9f26b3a | 2008-06-16 17:13:27 -0700 | [diff] [blame] | 226 | struct net *net = sock_net(sk); |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 227 | |
Pavel Emelyanov | 9f26b3a | 2008-06-16 17:13:27 -0700 | [diff] [blame] | 228 | return inet_ehashfn(net, laddr, lport, faddr, fport); |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 229 | } |
| 230 | |
Arnaldo Carvalho de Melo | ce4a7d0 | 2008-06-10 12:39:35 -0700 | [diff] [blame] | 231 | static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops) |
| 232 | { |
| 233 | struct request_sock *req = reqsk_alloc(ops); |
Vegard Nossum | 45e3ff8 | 2008-09-09 06:43:12 +0200 | [diff] [blame] | 234 | struct inet_request_sock *ireq = inet_rsk(req); |
Arnaldo Carvalho de Melo | ce4a7d0 | 2008-06-10 12:39:35 -0700 | [diff] [blame] | 235 | |
Vegard Nossum | 45e3ff8 | 2008-09-09 06:43:12 +0200 | [diff] [blame] | 236 | if (req != NULL) { |
| 237 | kmemcheck_annotate_bitfield(ireq, flags); |
| 238 | ireq->opt = NULL; |
| 239 | } |
Arnaldo Carvalho de Melo | ce4a7d0 | 2008-06-10 12:39:35 -0700 | [diff] [blame] | 240 | |
| 241 | return req; |
| 242 | } |
| 243 | |
KOVACS Krisztian | 88ef4a5 | 2008-10-01 07:41:00 -0700 | [diff] [blame] | 244 | static inline __u8 inet_sk_flowi_flags(const struct sock *sk) |
| 245 | { |
David S. Miller | a4daad6 | 2011-01-27 22:01:53 -0800 | [diff] [blame] | 246 | __u8 flags = 0; |
| 247 | |
Julian Anastasov | 47670b7 | 2011-08-07 09:16:09 +0000 | [diff] [blame] | 248 | if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl) |
David S. Miller | a4daad6 | 2011-01-27 22:01:53 -0800 | [diff] [blame] | 249 | flags |= FLOWI_FLAG_ANYSRC; |
David S. Miller | a4daad6 | 2011-01-27 22:01:53 -0800 | [diff] [blame] | 250 | return flags; |
KOVACS Krisztian | 88ef4a5 | 2008-10-01 07:41:00 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 253 | #endif /* _INET_SOCK_H */ |