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Commit | Line | Data |
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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> | |
1da177e4 | 31 | #include <net/snmp.h> |
86b08d86 | 32 | #include <net/flow.h> |
1da177e4 LT |
33 | |
34 | struct sock; | |
35 | ||
fd2c3ef7 | 36 | struct inet_skb_parm { |
1da177e4 LT |
37 | struct ip_options opt; /* Compiled IP options */ |
38 | unsigned char flags; | |
39 | ||
8cdfab8a PM |
40 | #define IPSKB_FORWARDED 1 |
41 | #define IPSKB_XFRM_TUNNEL_SIZE 2 | |
3e3850e9 PM |
42 | #define IPSKB_XFRM_TRANSFORMED 4 |
43 | #define IPSKB_FRAG_COMPLETE 8 | |
48d5cad8 | 44 | #define IPSKB_REROUTED 16 |
1da177e4 LT |
45 | }; |
46 | ||
c9bdd4b5 ACM |
47 | static inline unsigned int ip_hdrlen(const struct sk_buff *skb) |
48 | { | |
eddc9ec5 | 49 | return ip_hdr(skb)->ihl * 4; |
c9bdd4b5 ACM |
50 | } |
51 | ||
fd2c3ef7 | 52 | struct ipcm_cookie { |
c1d18f9f | 53 | __be32 addr; |
1da177e4 | 54 | int oif; |
f6d8bd05 | 55 | struct ip_options_rcu *opt; |
2244d07b | 56 | __u8 tx_flags; |
1da177e4 LT |
57 | }; |
58 | ||
59 | #define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb)) | |
60 | ||
fd2c3ef7 | 61 | struct ip_ra_chain { |
43a951e9 | 62 | struct ip_ra_chain __rcu *next; |
1da177e4 | 63 | struct sock *sk; |
592fcb9d ED |
64 | union { |
65 | void (*destructor)(struct sock *); | |
66 | struct sock *saved_sk; | |
67 | }; | |
66018506 | 68 | struct rcu_head rcu; |
1da177e4 LT |
69 | }; |
70 | ||
43a951e9 | 71 | extern struct ip_ra_chain __rcu *ip_ra_chain; |
1da177e4 LT |
72 | |
73 | /* IP flags. */ | |
74 | #define IP_CE 0x8000 /* Flag: "Congestion" */ | |
75 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ | |
76 | #define IP_MF 0x2000 /* Flag: "More Fragments" */ | |
77 | #define IP_OFFSET 0x1FFF /* "Fragment Offset" part */ | |
78 | ||
79 | #define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */ | |
80 | ||
14c85021 ACM |
81 | struct msghdr; |
82 | struct net_device; | |
83 | struct packet_type; | |
84 | struct rtable; | |
14c85021 ACM |
85 | struct sockaddr; |
86 | ||
1da177e4 LT |
87 | extern int igmp_mc_proc_init(void); |
88 | ||
89 | /* | |
90 | * Functions provided by ip.c | |
91 | */ | |
92 | ||
93 | extern int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk, | |
13d8eaa0 | 94 | __be32 saddr, __be32 daddr, |
f6d8bd05 | 95 | struct ip_options_rcu *opt); |
1da177e4 | 96 | extern int ip_rcv(struct sk_buff *skb, struct net_device *dev, |
f2ccd8fa | 97 | struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
98 | extern int ip_local_deliver(struct sk_buff *skb); |
99 | extern int ip_mr_input(struct sk_buff *skb); | |
100 | extern int ip_output(struct sk_buff *skb); | |
101 | extern int ip_mc_output(struct sk_buff *skb); | |
2e2f7aef | 102 | extern int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); |
1da177e4 LT |
103 | extern int ip_do_nat(struct sk_buff *skb); |
104 | extern void ip_send_check(struct iphdr *ip); | |
c439cb2e HX |
105 | extern int __ip_local_out(struct sk_buff *skb); |
106 | extern int ip_local_out(struct sk_buff *skb); | |
d9d8da80 | 107 | extern int ip_queue_xmit(struct sk_buff *skb, struct flowi *fl); |
1da177e4 | 108 | extern void ip_init(void); |
f5fca608 | 109 | extern int ip_append_data(struct sock *sk, struct flowi4 *fl4, |
1da177e4 LT |
110 | int getfrag(void *from, char *to, int offset, int len, |
111 | int odd, struct sk_buff *skb), | |
112 | void *from, int len, int protolen, | |
113 | struct ipcm_cookie *ipc, | |
2e77d89b | 114 | struct rtable **rt, |
1da177e4 LT |
115 | unsigned int flags); |
116 | extern int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb); | |
f5fca608 | 117 | extern ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page, |
1da177e4 | 118 | int offset, size_t size, int flags); |
1c32c5ad | 119 | extern struct sk_buff *__ip_make_skb(struct sock *sk, |
77968b78 | 120 | struct flowi4 *fl4, |
1c32c5ad HX |
121 | struct sk_buff_head *queue, |
122 | struct inet_cork *cork); | |
123 | extern int ip_send_skb(struct sk_buff *skb); | |
77968b78 | 124 | extern int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4); |
1da177e4 | 125 | extern void ip_flush_pending_frames(struct sock *sk); |
1c32c5ad | 126 | extern struct sk_buff *ip_make_skb(struct sock *sk, |
77968b78 | 127 | struct flowi4 *fl4, |
1c32c5ad HX |
128 | int getfrag(void *from, char *to, int offset, int len, |
129 | int odd, struct sk_buff *skb), | |
130 | void *from, int length, int transhdrlen, | |
131 | struct ipcm_cookie *ipc, | |
132 | struct rtable **rtp, | |
133 | unsigned int flags); | |
134 | ||
77968b78 | 135 | static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4) |
1c32c5ad | 136 | { |
77968b78 | 137 | return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base); |
1c32c5ad | 138 | } |
1da177e4 LT |
139 | |
140 | /* datagram.c */ | |
141 | extern int ip4_datagram_connect(struct sock *sk, | |
142 | struct sockaddr *uaddr, int addr_len); | |
143 | ||
1da177e4 LT |
144 | struct ip_reply_arg { |
145 | struct kvec iov[1]; | |
88ef4a5a | 146 | int flags; |
d6f5493c | 147 | __wsum csum; |
1da177e4 LT |
148 | int csumoffset; /* u16 offset of csum in iov[0].iov_base */ |
149 | /* -1 if not needed */ | |
f0e48dbf | 150 | int bound_dev_if; |
66b13d99 | 151 | u8 tos; |
1da177e4 LT |
152 | }; |
153 | ||
88ef4a5a KK |
154 | #define IP_REPLY_ARG_NOSRCCHECK 1 |
155 | ||
86b08d86 KK |
156 | static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg) |
157 | { | |
158 | return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0; | |
159 | } | |
160 | ||
0a5ebb80 | 161 | void ip_send_reply(struct sock *sk, struct sk_buff *skb, __be32 daddr, |
66b13d99 | 162 | const struct ip_reply_arg *arg, unsigned int len); |
1da177e4 | 163 | |
fd2c3ef7 | 164 | struct ipv4_config { |
1da177e4 | 165 | int log_martians; |
1da177e4 LT |
166 | int no_pmtu_disc; |
167 | }; | |
168 | ||
169 | extern struct ipv4_config ipv4_config; | |
4ce3c183 ED |
170 | #define IP_INC_STATS(net, field) SNMP_INC_STATS64((net)->mib.ip_statistics, field) |
171 | #define IP_INC_STATS_BH(net, field) SNMP_INC_STATS64_BH((net)->mib.ip_statistics, field) | |
172 | #define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS64((net)->mib.ip_statistics, field, val) | |
173 | #define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS64_BH((net)->mib.ip_statistics, field, val) | |
174 | #define IP_UPD_PO_STATS(net, field, val) SNMP_UPD_PO_STATS64((net)->mib.ip_statistics, field, val) | |
175 | #define IP_UPD_PO_STATS_BH(net, field, val) SNMP_UPD_PO_STATS64_BH((net)->mib.ip_statistics, field, val) | |
61a7e260 PE |
176 | #define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field) |
177 | #define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field) | |
178 | #define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field) | |
179 | #define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd) | |
180 | #define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd) | |
1da177e4 | 181 | |
7d720c3e | 182 | extern unsigned long snmp_fold_field(void __percpu *mib[], int offt); |
4ce3c183 ED |
183 | #if BITS_PER_LONG==32 |
184 | extern u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t sync_off); | |
185 | #else | |
186 | static inline u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_off) | |
187 | { | |
188 | return snmp_fold_field(mib, offt); | |
189 | } | |
190 | #endif | |
1823e4c8 | 191 | extern int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align); |
7d720c3e | 192 | extern void snmp_mib_free(void __percpu *ptr[2]); |
33490170 | 193 | |
3c689b73 ED |
194 | extern struct local_ports { |
195 | seqlock_t lock; | |
196 | int range[2]; | |
197 | } sysctl_local_ports; | |
227b60f5 SH |
198 | extern void inet_get_local_port_range(int *low, int *high); |
199 | ||
e3826f1e AW |
200 | extern unsigned long *sysctl_local_reserved_ports; |
201 | static inline int inet_is_reserved_local_port(int port) | |
202 | { | |
203 | return test_bit(port, sysctl_local_reserved_ports); | |
204 | } | |
205 | ||
cdac4e07 | 206 | extern int sysctl_ip_nonlocal_bind; |
1da177e4 | 207 | |
20380731 ACM |
208 | /* From inetpeer.c */ |
209 | extern int inet_peer_threshold; | |
210 | extern int inet_peer_minttl; | |
211 | extern int inet_peer_maxttl; | |
20380731 ACM |
212 | |
213 | /* From ip_output.c */ | |
214 | extern int sysctl_ip_dynaddr; | |
215 | ||
216 | extern void ipfrag_init(void); | |
217 | ||
bd7b1533 AV |
218 | extern void ip_static_sysctl_init(void); |
219 | ||
d18cd551 DM |
220 | static inline bool ip_is_fragment(const struct iphdr *iph) |
221 | { | |
222 | return (iph->frag_off & htons(IP_MF | IP_OFFSET)) != 0; | |
223 | } | |
224 | ||
1da177e4 | 225 | #ifdef CONFIG_INET |
14c85021 ACM |
226 | #include <net/dst.h> |
227 | ||
1da177e4 LT |
228 | /* The function in 2.2 was invalid, producing wrong result for |
229 | * check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */ | |
230 | static inline | |
231 | int ip_decrease_ttl(struct iphdr *iph) | |
232 | { | |
5c78f275 AV |
233 | u32 check = (__force u32)iph->check; |
234 | check += (__force u32)htons(0x0100); | |
235 | iph->check = (__force __sum16)(check + (check>=0xFFFF)); | |
1da177e4 LT |
236 | return --iph->ttl; |
237 | } | |
238 | ||
239 | static inline | |
240 | int ip_dont_fragment(struct sock *sk, struct dst_entry *dst) | |
241 | { | |
a02cec21 | 242 | return inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO || |
1da177e4 | 243 | (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT && |
a02cec21 | 244 | !(dst_metric_locked(dst, RTAX_MTU))); |
1da177e4 LT |
245 | } |
246 | ||
247 | extern void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more); | |
248 | ||
249 | static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, struct sock *sk) | |
250 | { | |
251 | if (iph->frag_off & htons(IP_DF)) { | |
252 | /* This is only to work around buggy Windows95/2000 | |
253 | * VJ compression implementations. If the ID field | |
254 | * does not change, they drop every other packet in | |
255 | * a TCP stream using header compression. | |
256 | */ | |
c720c7e8 ED |
257 | iph->id = (sk && inet_sk(sk)->inet_daddr) ? |
258 | htons(inet_sk(sk)->inet_id++) : 0; | |
1da177e4 LT |
259 | } else |
260 | __ip_select_ident(iph, dst, 0); | |
261 | } | |
262 | ||
263 | static inline void ip_select_ident_more(struct iphdr *iph, struct dst_entry *dst, struct sock *sk, int more) | |
264 | { | |
265 | if (iph->frag_off & htons(IP_DF)) { | |
c720c7e8 ED |
266 | if (sk && inet_sk(sk)->inet_daddr) { |
267 | iph->id = htons(inet_sk(sk)->inet_id); | |
268 | inet_sk(sk)->inet_id += 1 + more; | |
1da177e4 LT |
269 | } else |
270 | iph->id = 0; | |
271 | } else | |
272 | __ip_select_ident(iph, dst, more); | |
273 | } | |
274 | ||
275 | /* | |
276 | * Map a multicast IP onto multicast MAC for type ethernet. | |
277 | */ | |
278 | ||
714e85be | 279 | static inline void ip_eth_mc_map(__be32 naddr, char *buf) |
1da177e4 | 280 | { |
714e85be | 281 | __u32 addr=ntohl(naddr); |
1da177e4 LT |
282 | buf[0]=0x01; |
283 | buf[1]=0x00; | |
284 | buf[2]=0x5e; | |
285 | buf[5]=addr&0xFF; | |
286 | addr>>=8; | |
287 | buf[4]=addr&0xFF; | |
288 | addr>>=8; | |
289 | buf[3]=addr&0x7F; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Map a multicast IP onto multicast MAC for type IP-over-InfiniBand. | |
294 | * Leave P_Key as 0 to be filled in by driver. | |
295 | */ | |
296 | ||
a9e527e3 | 297 | static inline void ip_ib_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf) |
1da177e4 | 298 | { |
714e85be | 299 | __u32 addr; |
a9e527e3 RM |
300 | unsigned char scope = broadcast[5] & 0xF; |
301 | ||
1da177e4 LT |
302 | buf[0] = 0; /* Reserved */ |
303 | buf[1] = 0xff; /* Multicast QPN */ | |
304 | buf[2] = 0xff; | |
305 | buf[3] = 0xff; | |
714e85be | 306 | addr = ntohl(naddr); |
1da177e4 | 307 | buf[4] = 0xff; |
a9e527e3 | 308 | buf[5] = 0x10 | scope; /* scope from broadcast address */ |
1da177e4 LT |
309 | buf[6] = 0x40; /* IPv4 signature */ |
310 | buf[7] = 0x1b; | |
a9e527e3 RM |
311 | buf[8] = broadcast[8]; /* P_Key */ |
312 | buf[9] = broadcast[9]; | |
1da177e4 LT |
313 | buf[10] = 0; |
314 | buf[11] = 0; | |
315 | buf[12] = 0; | |
316 | buf[13] = 0; | |
317 | buf[14] = 0; | |
318 | buf[15] = 0; | |
319 | buf[19] = addr & 0xff; | |
320 | addr >>= 8; | |
321 | buf[18] = addr & 0xff; | |
322 | addr >>= 8; | |
323 | buf[17] = addr & 0xff; | |
324 | addr >>= 8; | |
325 | buf[16] = addr & 0x0f; | |
326 | } | |
327 | ||
93ca3bb5 TT |
328 | static inline void ip_ipgre_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf) |
329 | { | |
330 | if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) | |
331 | memcpy(buf, broadcast, 4); | |
332 | else | |
333 | memcpy(buf, &naddr, sizeof(naddr)); | |
334 | } | |
335 | ||
dfd56b8b | 336 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
337 | #include <linux/ipv6.h> |
338 | #endif | |
339 | ||
340 | static __inline__ void inet_reset_saddr(struct sock *sk) | |
341 | { | |
c720c7e8 | 342 | inet_sk(sk)->inet_rcv_saddr = inet_sk(sk)->inet_saddr = 0; |
dfd56b8b | 343 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
344 | if (sk->sk_family == PF_INET6) { |
345 | struct ipv6_pinfo *np = inet6_sk(sk); | |
346 | ||
347 | memset(&np->saddr, 0, sizeof(np->saddr)); | |
348 | memset(&np->rcv_saddr, 0, sizeof(np->rcv_saddr)); | |
349 | } | |
350 | #endif | |
351 | } | |
352 | ||
353 | #endif | |
354 | ||
7ad6848c OP |
355 | static inline int sk_mc_loop(struct sock *sk) |
356 | { | |
357 | if (!sk) | |
358 | return 1; | |
359 | switch (sk->sk_family) { | |
360 | case AF_INET: | |
361 | return inet_sk(sk)->mc_loop; | |
dfd56b8b | 362 | #if IS_ENABLED(CONFIG_IPV6) |
7ad6848c OP |
363 | case AF_INET6: |
364 | return inet6_sk(sk)->mc_loop; | |
365 | #endif | |
366 | } | |
cd65c3c7 | 367 | WARN_ON(1); |
7ad6848c OP |
368 | return 1; |
369 | } | |
370 | ||
ba57b4db | 371 | extern bool ip_call_ra_chain(struct sk_buff *skb); |
1da177e4 LT |
372 | |
373 | /* | |
b798232f | 374 | * Functions provided by ip_fragment.c |
1da177e4 LT |
375 | */ |
376 | ||
fd2c3ef7 | 377 | enum ip_defrag_users { |
1da177e4 LT |
378 | IP_DEFRAG_LOCAL_DELIVER, |
379 | IP_DEFRAG_CALL_RA_CHAIN, | |
380 | IP_DEFRAG_CONNTRACK_IN, | |
4be929be | 381 | __IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
1da177e4 | 382 | IP_DEFRAG_CONNTRACK_OUT, |
4be929be | 383 | __IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 384 | IP_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 385 | __IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
1da177e4 LT |
386 | IP_DEFRAG_VS_IN, |
387 | IP_DEFRAG_VS_OUT, | |
595fc71b DM |
388 | IP_DEFRAG_VS_FWD, |
389 | IP_DEFRAG_AF_PACKET, | |
bc416d97 | 390 | IP_DEFRAG_MACVLAN, |
1da177e4 LT |
391 | }; |
392 | ||
776c729e | 393 | int ip_defrag(struct sk_buff *skb, u32 user); |
bc416d97 ED |
394 | #ifdef CONFIG_INET |
395 | struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user); | |
396 | #else | |
397 | static inline struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user) | |
398 | { | |
399 | return skb; | |
400 | } | |
401 | #endif | |
6ddc0822 | 402 | int ip_frag_mem(struct net *net); |
e5a2bb84 | 403 | int ip_frag_nqueues(struct net *net); |
1da177e4 LT |
404 | |
405 | /* | |
406 | * Functions provided by ip_forward.c | |
407 | */ | |
408 | ||
409 | extern int ip_forward(struct sk_buff *skb); | |
1da177e4 LT |
410 | |
411 | /* | |
412 | * Functions provided by ip_options.c | |
413 | */ | |
414 | ||
f6d8bd05 ED |
415 | extern void ip_options_build(struct sk_buff *skb, struct ip_options *opt, |
416 | __be32 daddr, struct rtable *rt, int is_frag); | |
1da177e4 LT |
417 | extern int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb); |
418 | extern void ip_options_fragment(struct sk_buff *skb); | |
0e6bd4a1 DL |
419 | extern int ip_options_compile(struct net *net, |
420 | struct ip_options *opt, struct sk_buff *skb); | |
f6d8bd05 | 421 | extern int ip_options_get(struct net *net, struct ip_options_rcu **optp, |
4c6ea29d | 422 | unsigned char *data, int optlen); |
f6d8bd05 | 423 | extern int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp, |
4c6ea29d | 424 | unsigned char __user *data, int optlen); |
1da177e4 LT |
425 | extern void ip_options_undo(struct ip_options * opt); |
426 | extern void ip_forward_options(struct sk_buff *skb); | |
427 | extern int ip_options_rcv_srr(struct sk_buff *skb); | |
428 | ||
429 | /* | |
430 | * Functions provided by ip_sockglue.c | |
431 | */ | |
432 | ||
d826eb14 | 433 | extern void ipv4_pktinfo_prepare(struct sk_buff *skb); |
1da177e4 | 434 | extern void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb); |
7a6adb92 DL |
435 | extern int ip_cmsg_send(struct net *net, |
436 | struct msghdr *msg, struct ipcm_cookie *ipc); | |
b7058842 | 437 | extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen); |
1da177e4 | 438 | extern int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen); |
3fdadf7d | 439 | extern int compat_ip_setsockopt(struct sock *sk, int level, |
b7058842 | 440 | int optname, char __user *optval, unsigned int optlen); |
3fdadf7d DM |
441 | extern int compat_ip_getsockopt(struct sock *sk, int level, |
442 | int optname, char __user *optval, int __user *optlen); | |
1da177e4 LT |
443 | extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *)); |
444 | ||
445 | extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len); | |
446 | extern void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, | |
35986b32 | 447 | __be16 port, u32 info, u8 *payload); |
0579016e | 448 | extern void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport, |
1da177e4 LT |
449 | u32 info); |
450 | ||
20380731 ACM |
451 | #ifdef CONFIG_PROC_FS |
452 | extern int ip_misc_proc_init(void); | |
453 | #endif | |
454 | ||
1da177e4 | 455 | #endif /* _IP_H */ |