]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - include/net/ip.h
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: bpf: arm: make hole-faulting more robust
[mirror_ubuntu-artful-kernel.git] / include / net / ip.h
CommitLineData
1da177e4
LT		 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 the IP module.
7 *
8 * Version: @(#)ip.h 1.0.2 05/07/93
9 *
02c30a84 10 * Authors: Ross Biro
1da177e4
LT		 11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Alan Cox, <gw4pts@gw4pts.ampr.org>
13 *
14 * Changes:
15 * Mike McLagan : Routing by source
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
21 */
22#ifndef _IP_H
23#define _IP_H
24
1da177e4 25#include <linux/types.h>
1da177e4
LT		 26#include <linux/ip.h>
27#include <linux/in.h>
c9bdd4b5 28#include <linux/skbuff.h>
14c85021
ACM		 29
30#include <net/inet_sock.h>
aa661581 31#include <net/route.h>
1da177e4 32#include <net/snmp.h>
86b08d86 33#include <net/flow.h>
b73c3d0e 34#include <net/flow_keys.h>
1da177e4
LT		 35
36struct sock;
37
fd2c3ef7 38struct inet_skb_parm {
1da177e4
LT		 39 struct ip_options opt; /* Compiled IP options */
40 unsigned char flags;
41
8cdfab8a
PM		 42#define IPSKB_FORWARDED 1
43#define IPSKB_XFRM_TUNNEL_SIZE 2
3e3850e9
PM		 44#define IPSKB_XFRM_TRANSFORMED 4
45#define IPSKB_FRAG_COMPLETE 8
48d5cad8 46#define IPSKB_REROUTED 16
5f2d04f1
PM		 47
48 u16 frag_max_size;
1da177e4
LT		 49};
50
c9bdd4b5
ACM		 51static inline unsigned int ip_hdrlen(const struct sk_buff *skb)
52{
eddc9ec5 53 return ip_hdr(skb)->ihl * 4;
c9bdd4b5
ACM		 54}
55
fd2c3ef7 56struct ipcm_cookie {
c1d18f9f 57 __be32 addr;
1da177e4 58 int oif;
f6d8bd05 59 struct ip_options_rcu *opt;
2244d07b 60 __u8 tx_flags;
f02db315
FF		 61 __u8 ttl;
62 __s16 tos;
63 char priority;
1da177e4
LT		 64};
65
66#define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb))
4b261c75 67#define PKTINFO_SKB_CB(skb) ((struct in_pktinfo *)((skb)->cb))
1da177e4 68
fd2c3ef7 69struct ip_ra_chain {
43a951e9 70 struct ip_ra_chain __rcu *next;
1da177e4 71 struct sock *sk;
592fcb9d
ED		 72 union {
73 void (*destructor)(struct sock *);
74 struct sock *saved_sk;
75 };
66018506 76 struct rcu_head rcu;
1da177e4
LT		 77};
78
43a951e9 79extern struct ip_ra_chain __rcu *ip_ra_chain;
1da177e4
LT		 80
81/* IP flags. */
82#define IP_CE 0x8000 /* Flag: "Congestion" */
83#define IP_DF 0x4000 /* Flag: "Don't Fragment" */
84#define IP_MF 0x2000 /* Flag: "More Fragments" */
85#define IP_OFFSET 0x1FFF /* "Fragment Offset" part */
86
87#define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */
88
14c85021
ACM		 89struct msghdr;
90struct net_device;
91struct packet_type;
92struct rtable;
14c85021
ACM		 93struct sockaddr;
94
72c1d3bd 95int igmp_mc_init(void);
1da177e4
LT		 96
97/*
98 * Functions provided by ip.c
99 */
100
5c3a0fd7
JP		 101int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
102 __be32 saddr, __be32 daddr,
103 struct ip_options_rcu *opt);
104int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
105 struct net_device *orig_dev);
106int ip_local_deliver(struct sk_buff *skb);
107int ip_mr_input(struct sk_buff *skb);
aad88724
ED		 108int ip_output(struct sock *sk, struct sk_buff *skb);
109int ip_mc_output(struct sock *sk, struct sk_buff *skb);
5c3a0fd7
JP		 110int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
111int ip_do_nat(struct sk_buff *skb);
112void ip_send_check(struct iphdr *ip);
113int __ip_local_out(struct sk_buff *skb);
aad88724
ED		 114int ip_local_out_sk(struct sock *sk, struct sk_buff *skb);
115static inline int ip_local_out(struct sk_buff *skb)
116{
117 return ip_local_out_sk(skb->sk, skb);
118}
119
b0270e91 120int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl);
5c3a0fd7
JP		 121void ip_init(void);
122int ip_append_data(struct sock *sk, struct flowi4 *fl4,
123 int getfrag(void *from, char *to, int offset, int len,
124 int odd, struct sk_buff *skb),
125 void *from, int len, int protolen,
126 struct ipcm_cookie *ipc,
127 struct rtable **rt,
128 unsigned int flags);
129int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd,
130 struct sk_buff *skb);
131ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
132 int offset, size_t size, int flags);
133struct sk_buff *__ip_make_skb(struct sock *sk, struct flowi4 *fl4,
134 struct sk_buff_head *queue,
135 struct inet_cork *cork);
136int ip_send_skb(struct net *net, struct sk_buff *skb);
137int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4);
138void ip_flush_pending_frames(struct sock *sk);
139struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4,
140 int getfrag(void *from, char *to, int offset,
141 int len, int odd, struct sk_buff *skb),
142 void *from, int length, int transhdrlen,
143 struct ipcm_cookie *ipc, struct rtable **rtp,
144 unsigned int flags);
1c32c5ad 145
77968b78 146static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4)
1c32c5ad 147{
77968b78 148 return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
1c32c5ad 149}
1da177e4 150
aa661581
FF		 151static inline __u8 get_rttos(struct ipcm_cookie* ipc, struct inet_sock *inet)
152{
153 return (ipc->tos != -1) ? RT_TOS(ipc->tos) : RT_TOS(inet->tos);
154}
155
156static inline __u8 get_rtconn_flags(struct ipcm_cookie* ipc, struct sock* sk)
157{
158 return (ipc->tos != -1) ? RT_CONN_FLAGS_TOS(sk, ipc->tos) : RT_CONN_FLAGS(sk);
159}
160
1da177e4 161/* datagram.c */
5c3a0fd7 162int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
1da177e4 163
5c3a0fd7 164void ip4_datagram_release_cb(struct sock *sk);
8141ed9f 165
1da177e4
LT		 166struct ip_reply_arg {
167 struct kvec iov[1];
88ef4a5a 168 int flags;
d6f5493c 169 __wsum csum;
1da177e4
LT		 170 int csumoffset; /* u16 offset of csum in iov[0].iov_base */
171 /* -1 if not needed */
f0e48dbf 172 int bound_dev_if;
66b13d99 173 u8 tos;
1da177e4
LT		 174};
175
88ef4a5a
KK		 176#define IP_REPLY_ARG_NOSRCCHECK 1
177
86b08d86
KK		 178static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg)
179{
180 return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0;
181}
182
be9f4a44 183void ip_send_unicast_reply(struct net *net, struct sk_buff *skb, __be32 daddr,
70e73416
DM		 184 __be32 saddr, const struct ip_reply_arg *arg,
185 unsigned int len);
1da177e4 186
4ce3c183
ED		 187#define IP_INC_STATS(net, field) SNMP_INC_STATS64((net)->mib.ip_statistics, field)
188#define IP_INC_STATS_BH(net, field) SNMP_INC_STATS64_BH((net)->mib.ip_statistics, field)
189#define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS64((net)->mib.ip_statistics, field, val)
190#define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS64_BH((net)->mib.ip_statistics, field, val)
191#define IP_UPD_PO_STATS(net, field, val) SNMP_UPD_PO_STATS64((net)->mib.ip_statistics, field, val)
192#define IP_UPD_PO_STATS_BH(net, field, val) SNMP_UPD_PO_STATS64_BH((net)->mib.ip_statistics, field, val)
61a7e260
PE		 193#define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field)
194#define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field)
195#define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field)
f7324acd 196#define NET_ADD_STATS(net, field, adnd) SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd)
61a7e260
PE		 197#define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd)
198#define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd)
1da177e4 199
698365fa 200unsigned long snmp_fold_field(void __percpu *mib, int offt);
4ce3c183 201#if BITS_PER_LONG==32
698365fa 202u64 snmp_fold_field64(void __percpu *mib, int offt, size_t sync_off);
4ce3c183 203#else
698365fa 204static inline u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_off)
4ce3c183
ED		 205{
206 return snmp_fold_field(mib, offt);
207}
208#endif
33490170 209
0bbf87d8 210void inet_get_local_port_range(struct net *net, int *low, int *high);
227b60f5 211
fcd77db0 212#ifdef CONFIG_SYSCTL
122ff243 213static inline int inet_is_local_reserved_port(struct net *net, int port)
e3826f1e 214{
122ff243
WC		 215 if (!net->ipv4.sysctl_local_reserved_ports)
216 return 0;
217 return test_bit(port, net->ipv4.sysctl_local_reserved_ports);
e3826f1e 218}
20e61da7
WC		 219
220static inline bool sysctl_dev_name_is_allowed(const char *name)
221{
222 return strcmp(name, "default") != 0 && strcmp(name, "all") != 0;
223}
224
122ff243
WC		 225#else
226static inline int inet_is_local_reserved_port(struct net *net, int port)
227{
228 return 0;
229}
230#endif
e3826f1e 231
20380731
ACM		 232/* From inetpeer.c */
233extern int inet_peer_threshold;
234extern int inet_peer_minttl;
235extern int inet_peer_maxttl;
20380731 236
6648bd7e
AD		 237/* From ip_input.c */
238extern int sysctl_ip_early_demux;
239
20380731
ACM		 240/* From ip_output.c */
241extern int sysctl_ip_dynaddr;
242
5c3a0fd7 243void ipfrag_init(void);
20380731 244
5c3a0fd7 245void ip_static_sysctl_init(void);
bd7b1533 246
e110861f
LC		 247#define IP4_REPLY_MARK(net, mark) \
248 ((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0)
249
d18cd551
DM		 250static inline bool ip_is_fragment(const struct iphdr *iph)
251{
252 return (iph->frag_off & htons(IP_MF | IP_OFFSET)) != 0;
253}
254
1da177e4 255#ifdef CONFIG_INET
14c85021
ACM		 256#include <net/dst.h>
257
1da177e4
LT		 258/* The function in 2.2 was invalid, producing wrong result for
259 * check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */
260static inline
261int ip_decrease_ttl(struct iphdr *iph)
262{
5c78f275
AV		 263 u32 check = (__force u32)iph->check;
264 check += (__force u32)htons(0x0100);
265 iph->check = (__force __sum16)(check + (check>=0xFFFF));
1da177e4
LT		 266 return --iph->ttl;
267}
268
269static inline
270int ip_dont_fragment(struct sock *sk, struct dst_entry *dst)
271{
a02cec21 272 return inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO ||
1da177e4 273 (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT &&
a02cec21 274 !(dst_metric_locked(dst, RTAX_MTU)));
1da177e4
LT		 275}
276
f87c10a8
HFS		 277static inline bool ip_sk_accept_pmtu(const struct sock *sk)
278{
1b346576
HFS		 279 return inet_sk(sk)->pmtudisc != IP_PMTUDISC_INTERFACE &&
280 inet_sk(sk)->pmtudisc != IP_PMTUDISC_OMIT;
f87c10a8
HFS		 281}
282
283static inline bool ip_sk_use_pmtu(const struct sock *sk)
284{
285 return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE;
286}
287
60ff7467 288static inline bool ip_sk_ignore_df(const struct sock *sk)
1b346576
HFS		 289{
290 return inet_sk(sk)->pmtudisc < IP_PMTUDISC_DO ||
291 inet_sk(sk)->pmtudisc == IP_PMTUDISC_OMIT;
292}
293
f87c10a8
HFS		 294static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst,
295 bool forwarding)
296{
297 struct net *net = dev_net(dst->dev);
298
299 if (net->ipv4.sysctl_ip_fwd_use_pmtu ||
300 dst_metric_locked(dst, RTAX_MTU) ||
301 !forwarding)
302 return dst_mtu(dst);
303
304 return min(dst->dev->mtu, IP_MAX_MTU);
305}
306
307static inline unsigned int ip_skb_dst_mtu(const struct sk_buff *skb)
308{
309 if (!skb->sk || ip_sk_use_pmtu(skb->sk)) {
310 bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED;
311 return ip_dst_mtu_maybe_forward(skb_dst(skb), forwarding);
312 } else {
313 return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU);
314 }
315}
316
04ca6973 317u32 ip_idents_reserve(u32 hash, int segs);
73f156a6
ED		 318void __ip_select_ident(struct iphdr *iph, int segs);
319
320static inline void ip_select_ident_segs(struct sk_buff *skb, struct sock *sk, int segs)
1da177e4 321{
703133de
AA		 322 struct iphdr *iph = ip_hdr(skb);
323
60ff7467 324 if ((iph->frag_off & htons(IP_DF)) && !skb->ignore_df) {
1da177e4
LT		 325 /* This is only to work around buggy Windows95/2000
326 * VJ compression implementations. If the ID field
327 * does not change, they drop every other packet in
328 * a TCP stream using header compression.
329 */
c720c7e8
ED		 330 if (sk && inet_sk(sk)->inet_daddr) {
331 iph->id = htons(inet_sk(sk)->inet_id);
73f156a6
ED		 332 inet_sk(sk)->inet_id += segs;
333 } else {
1da177e4 334 iph->id = 0;
73f156a6
ED		 335 }
336 } else {
337 __ip_select_ident(iph, segs);
338 }
339}
340
341static inline void ip_select_ident(struct sk_buff *skb, struct sock *sk)
342{
343 ip_select_ident_segs(skb, sk, 1);
1da177e4
LT		 344}
345
ed70fcfc
TH		 346static inline __wsum inet_compute_pseudo(struct sk_buff *skb, int proto)
347{
348 return csum_tcpudp_nofold(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr,
349 skb->len, proto, 0);
350}
351
b73c3d0e
TH		 352static inline void inet_set_txhash(struct sock *sk)
353{
354 struct inet_sock *inet = inet_sk(sk);
355 struct flow_keys keys;
356
357 keys.src = inet->inet_saddr;
358 keys.dst = inet->inet_daddr;
359 keys.port16[0] = inet->inet_sport;
360 keys.port16[1] = inet->inet_dport;
361
362 sk->sk_txhash = flow_hash_from_keys(&keys);
363}
364
1933a785
TH		 365static inline __wsum inet_gro_compute_pseudo(struct sk_buff *skb, int proto)
366{
367 const struct iphdr *iph = skb_gro_network_header(skb);
368
369 return csum_tcpudp_nofold(iph->saddr, iph->daddr,
370 skb_gro_len(skb), proto, 0);
371}
372
1da177e4
LT		 373/*
374 * Map a multicast IP onto multicast MAC for type ethernet.
375 */
376
714e85be 377static inline void ip_eth_mc_map(__be32 naddr, char *buf)
1da177e4 378{
714e85be 379 __u32 addr=ntohl(naddr);
1da177e4
LT		 380 buf[0]=0x01;
381 buf[1]=0x00;
382 buf[2]=0x5e;
383 buf[5]=addr&0xFF;
384 addr>>=8;
385 buf[4]=addr&0xFF;
386 addr>>=8;
387 buf[3]=addr&0x7F;
388}
389
390/*
391 * Map a multicast IP onto multicast MAC for type IP-over-InfiniBand.
392 * Leave P_Key as 0 to be filled in by driver.
393 */
394
a9e527e3 395static inline void ip_ib_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf)
1da177e4 396{
714e85be 397 __u32 addr;
a9e527e3
RM		 398 unsigned char scope = broadcast[5] & 0xF;
399
1da177e4
LT		 400 buf[0] = 0; /* Reserved */
401 buf[1] = 0xff; /* Multicast QPN */
402 buf[2] = 0xff;
403 buf[3] = 0xff;
714e85be 404 addr = ntohl(naddr);
1da177e4 405 buf[4] = 0xff;
a9e527e3 406 buf[5] = 0x10 | scope; /* scope from broadcast address */
1da177e4
LT		 407 buf[6] = 0x40; /* IPv4 signature */
408 buf[7] = 0x1b;
a9e527e3
RM		 409 buf[8] = broadcast[8]; /* P_Key */
410 buf[9] = broadcast[9];
1da177e4
LT		 411 buf[10] = 0;
412 buf[11] = 0;
413 buf[12] = 0;
414 buf[13] = 0;
415 buf[14] = 0;
416 buf[15] = 0;
417 buf[19] = addr & 0xff;
418 addr >>= 8;
419 buf[18] = addr & 0xff;
420 addr >>= 8;
421 buf[17] = addr & 0xff;
422 addr >>= 8;
423 buf[16] = addr & 0x0f;
424}
425
93ca3bb5
TT		 426static inline void ip_ipgre_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf)
427{
428 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0)
429 memcpy(buf, broadcast, 4);
430 else
431 memcpy(buf, &naddr, sizeof(naddr));
432}
433
dfd56b8b 434#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 435#include <linux/ipv6.h>
436#endif
437
438static __inline__ void inet_reset_saddr(struct sock *sk)
439{
c720c7e8 440 inet_sk(sk)->inet_rcv_saddr = inet_sk(sk)->inet_saddr = 0;
dfd56b8b 441#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 442 if (sk->sk_family == PF_INET6) {
443 struct ipv6_pinfo *np = inet6_sk(sk);
444
445 memset(&np->saddr, 0, sizeof(np->saddr));
efe4208f 446 memset(&sk->sk_v6_rcv_saddr, 0, sizeof(sk->sk_v6_rcv_saddr));
1da177e4
LT		 447 }
448#endif
449}
450
451#endif
452
7ad6848c
OP		 453static inline int sk_mc_loop(struct sock *sk)
454{
455 if (!sk)
456 return 1;
457 switch (sk->sk_family) {
458 case AF_INET:
459 return inet_sk(sk)->mc_loop;
dfd56b8b 460#if IS_ENABLED(CONFIG_IPV6)
7ad6848c
OP		 461 case AF_INET6:
462 return inet6_sk(sk)->mc_loop;
463#endif
464 }
cd65c3c7 465 WARN_ON(1);
7ad6848c
OP		 466 return 1;
467}
468
5c3a0fd7 469bool ip_call_ra_chain(struct sk_buff *skb);
1da177e4
LT		 470
471/*
b798232f 472 * Functions provided by ip_fragment.c
1da177e4
LT		 473 */
474
fd2c3ef7 475enum ip_defrag_users {
1da177e4
LT		 476 IP_DEFRAG_LOCAL_DELIVER,
477 IP_DEFRAG_CALL_RA_CHAIN,
478 IP_DEFRAG_CONNTRACK_IN,
4be929be 479 __IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHRT_MAX,
1da177e4 480 IP_DEFRAG_CONNTRACK_OUT,
4be929be 481 __IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
8fa9ff68 482 IP_DEFRAG_CONNTRACK_BRIDGE_IN,
4be929be 483 __IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
1da177e4
LT		 484 IP_DEFRAG_VS_IN,
485 IP_DEFRAG_VS_OUT,
595fc71b
DM		 486 IP_DEFRAG_VS_FWD,
487 IP_DEFRAG_AF_PACKET,
bc416d97 488 IP_DEFRAG_MACVLAN,
1da177e4
LT		 489};
490
776c729e 491int ip_defrag(struct sk_buff *skb, u32 user);
bc416d97
ED		 492#ifdef CONFIG_INET
493struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user);
494#else
495static inline struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user)
496{
497 return skb;
498}
499#endif
6ddc0822 500int ip_frag_mem(struct net *net);
1da177e4
LT		 501
502/*
503 * Functions provided by ip_forward.c
504 */
505
5c3a0fd7 506int ip_forward(struct sk_buff *skb);
1da177e4
LT		 507
508/*
509 * Functions provided by ip_options.c
510 */
511
5c3a0fd7
JP		 512void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
513 __be32 daddr, struct rtable *rt, int is_frag);
514int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb);
515void ip_options_fragment(struct sk_buff *skb);
516int ip_options_compile(struct net *net, struct ip_options *opt,
517 struct sk_buff *skb);
518int ip_options_get(struct net *net, struct ip_options_rcu **optp,
519 unsigned char *data, int optlen);
520int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
521 unsigned char __user *data, int optlen);
522void ip_options_undo(struct ip_options *opt);
523void ip_forward_options(struct sk_buff *skb);
524int ip_options_rcv_srr(struct sk_buff *skb);
1da177e4
LT		 525
526/*
527 * Functions provided by ip_sockglue.c
528 */
529
fbf8866d 530void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb);
5c3a0fd7 531void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb);
c8e6ad08
HFS		 532int ip_cmsg_send(struct net *net, struct msghdr *msg,
533 struct ipcm_cookie *ipc, bool allow_ipv6);
5c3a0fd7
JP		 534int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
535 unsigned int optlen);
536int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
537 int __user *optlen);
538int compat_ip_setsockopt(struct sock *sk, int level, int optname,
539 char __user *optval, unsigned int optlen);
540int compat_ip_getsockopt(struct sock *sk, int level, int optname,
541 char __user *optval, int __user *optlen);
542int ip_ra_control(struct sock *sk, unsigned char on,
543 void (*destructor)(struct sock *));
544
85fbaa75 545int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len);
5c3a0fd7
JP		 546void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
547 u32 info, u8 *payload);
548void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport,
549 u32 info);
1da177e4 550
20380731 551#ifdef CONFIG_PROC_FS
5c3a0fd7 552int ip_misc_proc_init(void);
20380731
ACM		 553#endif
554
1da177e4 555#endif /* _IP_H */
Ubuntu Artful kernel mirror