~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/net/inet_sock.h

Version: ~ [ linux-5.6-rc7 ] ~ [ linux-5.5.11 ] ~ [ linux-5.4.27 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.112 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.174 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.217 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.217 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 #include <linux/bitops.h>
 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 #include <net/tcp_states.h>
 31 #include <net/l3mdev.h>
 32 
 33 /** struct ip_options - IP Options
 34  *
 35  * @faddr - Saved first hop address
 36  * @nexthop - Saved nexthop address in LSRR and SSRR
 37  * @is_strictroute - Strict source route
 38  * @srr_is_hit - Packet destination addr was our one
 39  * @is_changed - IP checksum more not valid
 40  * @rr_needaddr - Need to record addr of outgoing dev
 41  * @ts_needtime - Need to record timestamp
 42  * @ts_needaddr - Need to record addr of outgoing dev
 43  */
 44 struct ip_options {
 45         __be32          faddr;
 46         __be32          nexthop;
 47         unsigned char   optlen;
 48         unsigned char   srr;
 49         unsigned char   rr;
 50         unsigned char   ts;
 51         unsigned char   is_strictroute:1,
 52                         srr_is_hit:1,
 53                         is_changed:1,
 54                         rr_needaddr:1,
 55                         ts_needtime:1,
 56                         ts_needaddr:1;
 57         unsigned char   router_alert;
 58         unsigned char   cipso;
 59         unsigned char   __pad2;
 60         unsigned char   __data[0];
 61 };
 62 
 63 struct ip_options_rcu {
 64         struct rcu_head rcu;
 65         struct ip_options opt;
 66 };
 67 
 68 struct ip_options_data {
 69         struct ip_options_rcu   opt;
 70         char                    data[40];
 71 };
 72 
 73 struct inet_request_sock {
 74         struct request_sock     req;
 75 #define ir_loc_addr             req.__req_common.skc_rcv_saddr
 76 #define ir_rmt_addr             req.__req_common.skc_daddr
 77 #define ir_num                  req.__req_common.skc_num
 78 #define ir_rmt_port             req.__req_common.skc_dport
 79 #define ir_v6_rmt_addr          req.__req_common.skc_v6_daddr
 80 #define ir_v6_loc_addr          req.__req_common.skc_v6_rcv_saddr
 81 #define ir_iif                  req.__req_common.skc_bound_dev_if
 82 #define ir_cookie               req.__req_common.skc_cookie
 83 #define ireq_net                req.__req_common.skc_net
 84 #define ireq_state              req.__req_common.skc_state
 85 #define ireq_family             req.__req_common.skc_family
 86 
 87         kmemcheck_bitfield_begin(flags);
 88         u16                     snd_wscale : 4,
 89                                 rcv_wscale : 4,
 90                                 tstamp_ok  : 1,
 91                                 sack_ok    : 1,
 92                                 wscale_ok  : 1,
 93                                 ecn_ok     : 1,
 94                                 acked      : 1,
 95                                 no_srccheck: 1;
 96         kmemcheck_bitfield_end(flags);
 97         u32                     ir_mark;
 98         union {
 99                 struct ip_options_rcu   *opt;
100 #if IS_ENABLED(CONFIG_IPV6)
101                 struct {
102                         struct ipv6_txoptions   *ipv6_opt;
103                         struct sk_buff          *pktopts;
104                 };
105 #endif
106         };
107 };
108 
109 static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
110 {
111         return (struct inet_request_sock *)sk;
112 }
113 
114 static inline u32 inet_request_mark(const struct sock *sk, struct sk_buff *skb)
115 {
116         if (!sk->sk_mark && sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept)
117                 return skb->mark;
118 
119         return sk->sk_mark;
120 }
121 
122 static inline int inet_request_bound_dev_if(const struct sock *sk,
123                                             struct sk_buff *skb)
124 {
125 #ifdef CONFIG_NET_L3_MASTER_DEV
126         struct net *net = sock_net(sk);
127 
128         if (!sk->sk_bound_dev_if && net->ipv4.sysctl_tcp_l3mdev_accept)
129                 return l3mdev_master_ifindex_by_index(net, skb->skb_iif);
130 #endif
131 
132         return sk->sk_bound_dev_if;
133 }
134 
135 struct inet_cork {
136         unsigned int            flags;
137         __be32                  addr;
138         struct ip_options       *opt;
139         unsigned int            fragsize;
140         int                     length; /* Total length of all frames */
141         struct dst_entry        *dst;
142         u8                      tx_flags;
143         __u8                    ttl;
144         __s16                   tos;
145         char                    priority;
146 };
147 
148 struct inet_cork_full {
149         struct inet_cork        base;
150         struct flowi            fl;
151 };
152 
153 struct ip_mc_socklist;
154 struct ipv6_pinfo;
155 struct rtable;
156 
157 /** struct inet_sock - representation of INET sockets
158  *
159  * @sk - ancestor class
160  * @pinet6 - pointer to IPv6 control block
161  * @inet_daddr - Foreign IPv4 addr
162  * @inet_rcv_saddr - Bound local IPv4 addr
163  * @inet_dport - Destination port
164  * @inet_num - Local port
165  * @inet_saddr - Sending source
166  * @uc_ttl - Unicast TTL
167  * @inet_sport - Source port
168  * @inet_id - ID counter for DF pkts
169  * @tos - TOS
170  * @mc_ttl - Multicasting TTL
171  * @is_icsk - is this an inet_connection_sock?
172  * @uc_index - Unicast outgoing device index
173  * @mc_index - Multicast device index
174  * @mc_list - Group array
175  * @cork - info to build ip hdr on each ip frag while socket is corked
176  */
177 struct inet_sock {
178         /* sk and pinet6 has to be the first two members of inet_sock */
179         struct sock             sk;
180 #if IS_ENABLED(CONFIG_IPV6)
181         struct ipv6_pinfo       *pinet6;
182 #endif
183         /* Socket demultiplex comparisons on incoming packets. */
184 #define inet_daddr              sk.__sk_common.skc_daddr
185 #define inet_rcv_saddr          sk.__sk_common.skc_rcv_saddr
186 #define inet_dport              sk.__sk_common.skc_dport
187 #define inet_num                sk.__sk_common.skc_num
188 
189         __be32                  inet_saddr;
190         __s16                   uc_ttl;
191         __u16                   cmsg_flags;
192         __be16                  inet_sport;
193         __u16                   inet_id;
194 
195         struct ip_options_rcu __rcu     *inet_opt;
196         int                     rx_dst_ifindex;
197         __u8                    tos;
198         __u8                    min_ttl;
199         __u8                    mc_ttl;
200         __u8                    pmtudisc;
201         __u8                    recverr:1,
202                                 is_icsk:1,
203                                 freebind:1,
204                                 hdrincl:1,
205                                 mc_loop:1,
206                                 transparent:1,
207                                 mc_all:1,
208                                 nodefrag:1;
209         __u8                    bind_address_no_port:1,
210                                 defer_connect:1; /* Indicates that fastopen_connect is set
211                                                   * and cookie exists so we defer connect
212                                                   * until first data frame is written
213                                                   */
214         __u8                    rcv_tos;
215         __u8                    convert_csum;
216         int                     uc_index;
217         int                     mc_index;
218         __be32                  mc_addr;
219         struct ip_mc_socklist __rcu     *mc_list;
220         struct inet_cork_full   cork;
221 };
222 
223 #define IPCORK_OPT      1       /* ip-options has been held in ipcork.opt */
224 #define IPCORK_ALLFRAG  2       /* always fragment (for ipv6 for now) */
225 
226 /* cmsg flags for inet */
227 #define IP_CMSG_PKTINFO         BIT(0)
228 #define IP_CMSG_TTL             BIT(1)
229 #define IP_CMSG_TOS             BIT(2)
230 #define IP_CMSG_RECVOPTS        BIT(3)
231 #define IP_CMSG_RETOPTS         BIT(4)
232 #define IP_CMSG_PASSSEC         BIT(5)
233 #define IP_CMSG_ORIGDSTADDR     BIT(6)
234 #define IP_CMSG_CHECKSUM        BIT(7)
235 #define IP_CMSG_RECVFRAGSIZE    BIT(8)
236 
237 /**
238  * sk_to_full_sk - Access to a full socket
239  * @sk: pointer to a socket
240  *
241  * SYNACK messages might be attached to request sockets.
242  * Some places want to reach the listener in this case.
243  */
244 static inline struct sock *sk_to_full_sk(struct sock *sk)
245 {
246 #ifdef CONFIG_INET
247         if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
248                 sk = inet_reqsk(sk)->rsk_listener;
249 #endif
250         return sk;
251 }
252 
253 /* sk_to_full_sk() variant with a const argument */
254 static inline const struct sock *sk_const_to_full_sk(const struct sock *sk)
255 {
256 #ifdef CONFIG_INET
257         if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
258                 sk = ((const struct request_sock *)sk)->rsk_listener;
259 #endif
260         return sk;
261 }
262 
263 static inline struct sock *skb_to_full_sk(const struct sk_buff *skb)
264 {
265         return sk_to_full_sk(skb->sk);
266 }
267 
268 static inline struct inet_sock *inet_sk(const struct sock *sk)
269 {
270         return (struct inet_sock *)sk;
271 }
272 
273 static inline void __inet_sk_copy_descendant(struct sock *sk_to,
274                                              const struct sock *sk_from,
275                                              const int ancestor_size)
276 {
277         memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1,
278                sk_from->sk_prot->obj_size - ancestor_size);
279 }
280 #if !(IS_ENABLED(CONFIG_IPV6))
281 static inline void inet_sk_copy_descendant(struct sock *sk_to,
282                                            const struct sock *sk_from)
283 {
284         __inet_sk_copy_descendant(sk_to, sk_from, sizeof(struct inet_sock));
285 }
286 #endif
287 
288 int inet_sk_rebuild_header(struct sock *sk);
289 
290 static inline unsigned int __inet_ehashfn(const __be32 laddr,
291                                           const __u16 lport,
292                                           const __be32 faddr,
293                                           const __be16 fport,
294                                           u32 initval)
295 {
296         return jhash_3words((__force __u32) laddr,
297                             (__force __u32) faddr,
298                             ((__u32) lport) << 16 | (__force __u32)fport,
299                             initval);
300 }
301 
302 struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops,
303                                       struct sock *sk_listener,
304                                       bool attach_listener);
305 
306 static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
307 {
308         __u8 flags = 0;
309 
310         if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
311                 flags |= FLOWI_FLAG_ANYSRC;
312         return flags;
313 }
314 
315 static inline void inet_inc_convert_csum(struct sock *sk)
316 {
317         inet_sk(sk)->convert_csum++;
318 }
319 
320 static inline void inet_dec_convert_csum(struct sock *sk)
321 {
322         if (inet_sk(sk)->convert_csum > 0)
323                 inet_sk(sk)->convert_csum--;
324 }
325 
326 static inline bool inet_get_convert_csum(struct sock *sk)
327 {
328         return !!inet_sk(sk)->convert_csum;
329 }
330 
331 #endif  /* _INET_SOCK_H */
332 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp