Commit | Line | Data |
---|---|---|
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 |
5f2d04f1 PM |
45 | |
46 | u16 frag_max_size; | |
1da177e4 LT |
47 | }; |
48 | ||
c9bdd4b5 ACM |
49 | static inline unsigned int ip_hdrlen(const struct sk_buff *skb) |
50 | { | |
eddc9ec5 | 51 | return ip_hdr(skb)->ihl * 4; |
c9bdd4b5 ACM |
52 | } |
53 | ||
fd2c3ef7 | 54 | struct ipcm_cookie { |
c1d18f9f | 55 | __be32 addr; |
1da177e4 | 56 | int oif; |
f6d8bd05 | 57 | struct ip_options_rcu *opt; |
2244d07b | 58 | __u8 tx_flags; |
1da177e4 LT |
59 | }; |
60 | ||
61 | #define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb)) | |
62 | ||
fd2c3ef7 | 63 | struct ip_ra_chain { |
43a951e9 | 64 | struct ip_ra_chain __rcu *next; |
1da177e4 | 65 | struct sock *sk; |
592fcb9d ED |
66 | union { |
67 | void (*destructor)(struct sock *); | |
68 | struct sock *saved_sk; | |
69 | }; | |
66018506 | 70 | struct rcu_head rcu; |
1da177e4 LT |
71 | }; |
72 | ||
43a951e9 | 73 | extern struct ip_ra_chain __rcu *ip_ra_chain; |
1da177e4 LT |
74 | |
75 | /* IP flags. */ | |
76 | #define IP_CE 0x8000 /* Flag: "Congestion" */ | |
77 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ | |
78 | #define IP_MF 0x2000 /* Flag: "More Fragments" */ | |
79 | #define IP_OFFSET 0x1FFF /* "Fragment Offset" part */ | |
80 | ||
81 | #define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */ | |
82 | ||
14c85021 ACM |
83 | struct msghdr; |
84 | struct net_device; | |
85 | struct packet_type; | |
86 | struct rtable; | |
14c85021 ACM |
87 | struct sockaddr; |
88 | ||
1da177e4 LT |
89 | extern int igmp_mc_proc_init(void); |
90 | ||
91 | /* | |
92 | * Functions provided by ip.c | |
93 | */ | |
94 | ||
95 | extern int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk, | |
13d8eaa0 | 96 | __be32 saddr, __be32 daddr, |
f6d8bd05 | 97 | struct ip_options_rcu *opt); |
1da177e4 | 98 | extern int ip_rcv(struct sk_buff *skb, struct net_device *dev, |
f2ccd8fa | 99 | struct packet_type *pt, struct net_device *orig_dev); |
1da177e4 LT |
100 | extern int ip_local_deliver(struct sk_buff *skb); |
101 | extern int ip_mr_input(struct sk_buff *skb); | |
102 | extern int ip_output(struct sk_buff *skb); | |
103 | extern int ip_mc_output(struct sk_buff *skb); | |
2e2f7aef | 104 | extern int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); |
1da177e4 LT |
105 | extern int ip_do_nat(struct sk_buff *skb); |
106 | extern void ip_send_check(struct iphdr *ip); | |
c439cb2e HX |
107 | extern int __ip_local_out(struct sk_buff *skb); |
108 | extern int ip_local_out(struct sk_buff *skb); | |
d9d8da80 | 109 | extern int ip_queue_xmit(struct sk_buff *skb, struct flowi *fl); |
1da177e4 | 110 | extern void ip_init(void); |
f5fca608 | 111 | extern int ip_append_data(struct sock *sk, struct flowi4 *fl4, |
1da177e4 LT |
112 | int getfrag(void *from, char *to, int offset, int len, |
113 | int odd, struct sk_buff *skb), | |
114 | void *from, int len, int protolen, | |
115 | struct ipcm_cookie *ipc, | |
2e77d89b | 116 | struct rtable **rt, |
1da177e4 LT |
117 | unsigned int flags); |
118 | extern int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb); | |
f5fca608 | 119 | extern ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page, |
1da177e4 | 120 | int offset, size_t size, int flags); |
1c32c5ad | 121 | extern struct sk_buff *__ip_make_skb(struct sock *sk, |
77968b78 | 122 | struct flowi4 *fl4, |
1c32c5ad HX |
123 | struct sk_buff_head *queue, |
124 | struct inet_cork *cork); | |
b5ec8eea | 125 | extern int ip_send_skb(struct net *net, struct sk_buff *skb); |
77968b78 | 126 | extern int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4); |
1da177e4 | 127 | extern void ip_flush_pending_frames(struct sock *sk); |
1c32c5ad | 128 | extern struct sk_buff *ip_make_skb(struct sock *sk, |
77968b78 | 129 | struct flowi4 *fl4, |
1c32c5ad HX |
130 | int getfrag(void *from, char *to, int offset, int len, |
131 | int odd, struct sk_buff *skb), | |
132 | void *from, int length, int transhdrlen, | |
133 | struct ipcm_cookie *ipc, | |
134 | struct rtable **rtp, | |
135 | unsigned int flags); | |
136 | ||
77968b78 | 137 | static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4) |
1c32c5ad | 138 | { |
77968b78 | 139 | return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base); |
1c32c5ad | 140 | } |
1da177e4 LT |
141 | |
142 | /* datagram.c */ | |
143 | extern int ip4_datagram_connect(struct sock *sk, | |
144 | struct sockaddr *uaddr, int addr_len); | |
145 | ||
8141ed9f SK |
146 | extern void ip4_datagram_release_cb(struct sock *sk); |
147 | ||
1da177e4 LT |
148 | struct ip_reply_arg { |
149 | struct kvec iov[1]; | |
88ef4a5a | 150 | int flags; |
d6f5493c | 151 | __wsum csum; |
1da177e4 LT |
152 | int csumoffset; /* u16 offset of csum in iov[0].iov_base */ |
153 | /* -1 if not needed */ | |
f0e48dbf | 154 | int bound_dev_if; |
66b13d99 | 155 | u8 tos; |
1da177e4 LT |
156 | }; |
157 | ||
88ef4a5a KK |
158 | #define IP_REPLY_ARG_NOSRCCHECK 1 |
159 | ||
86b08d86 KK |
160 | static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg) |
161 | { | |
162 | return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0; | |
163 | } | |
164 | ||
be9f4a44 | 165 | void ip_send_unicast_reply(struct net *net, struct sk_buff *skb, __be32 daddr, |
70e73416 DM |
166 | __be32 saddr, const struct ip_reply_arg *arg, |
167 | unsigned int len); | |
1da177e4 | 168 | |
fd2c3ef7 | 169 | struct ipv4_config { |
1da177e4 | 170 | int log_martians; |
1da177e4 LT |
171 | int no_pmtu_disc; |
172 | }; | |
173 | ||
174 | extern struct ipv4_config ipv4_config; | |
4ce3c183 ED |
175 | #define IP_INC_STATS(net, field) SNMP_INC_STATS64((net)->mib.ip_statistics, field) |
176 | #define IP_INC_STATS_BH(net, field) SNMP_INC_STATS64_BH((net)->mib.ip_statistics, field) | |
177 | #define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS64((net)->mib.ip_statistics, field, val) | |
178 | #define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS64_BH((net)->mib.ip_statistics, field, val) | |
179 | #define IP_UPD_PO_STATS(net, field, val) SNMP_UPD_PO_STATS64((net)->mib.ip_statistics, field, val) | |
180 | #define IP_UPD_PO_STATS_BH(net, field, val) SNMP_UPD_PO_STATS64_BH((net)->mib.ip_statistics, field, val) | |
61a7e260 PE |
181 | #define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field) |
182 | #define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field) | |
183 | #define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field) | |
184 | #define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd) | |
185 | #define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd) | |
1da177e4 | 186 | |
7d720c3e | 187 | extern unsigned long snmp_fold_field(void __percpu *mib[], int offt); |
4ce3c183 ED |
188 | #if BITS_PER_LONG==32 |
189 | extern u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t sync_off); | |
190 | #else | |
191 | static inline u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_off) | |
192 | { | |
193 | return snmp_fold_field(mib, offt); | |
194 | } | |
195 | #endif | |
1823e4c8 | 196 | extern int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align); |
5a17a390 CW |
197 | |
198 | static inline void snmp_mib_free(void __percpu *ptr[SNMP_ARRAY_SZ]) | |
199 | { | |
200 | int i; | |
201 | ||
202 | BUG_ON(ptr == NULL); | |
203 | for (i = 0; i < SNMP_ARRAY_SZ; i++) { | |
204 | free_percpu(ptr[i]); | |
205 | ptr[i] = NULL; | |
206 | } | |
207 | } | |
33490170 | 208 | |
3c689b73 ED |
209 | extern struct local_ports { |
210 | seqlock_t lock; | |
211 | int range[2]; | |
212 | } sysctl_local_ports; | |
227b60f5 SH |
213 | extern void inet_get_local_port_range(int *low, int *high); |
214 | ||
e3826f1e AW |
215 | extern unsigned long *sysctl_local_reserved_ports; |
216 | static inline int inet_is_reserved_local_port(int port) | |
217 | { | |
218 | return test_bit(port, sysctl_local_reserved_ports); | |
219 | } | |
220 | ||
cdac4e07 | 221 | extern int sysctl_ip_nonlocal_bind; |
1da177e4 | 222 | |
20380731 ACM |
223 | /* From inetpeer.c */ |
224 | extern int inet_peer_threshold; | |
225 | extern int inet_peer_minttl; | |
226 | extern int inet_peer_maxttl; | |
20380731 | 227 | |
6648bd7e AD |
228 | /* From ip_input.c */ |
229 | extern int sysctl_ip_early_demux; | |
230 | ||
20380731 ACM |
231 | /* From ip_output.c */ |
232 | extern int sysctl_ip_dynaddr; | |
233 | ||
234 | extern void ipfrag_init(void); | |
235 | ||
bd7b1533 AV |
236 | extern void ip_static_sysctl_init(void); |
237 | ||
d18cd551 DM |
238 | static inline bool ip_is_fragment(const struct iphdr *iph) |
239 | { | |
240 | return (iph->frag_off & htons(IP_MF | IP_OFFSET)) != 0; | |
241 | } | |
242 | ||
1da177e4 | 243 | #ifdef CONFIG_INET |
14c85021 ACM |
244 | #include <net/dst.h> |
245 | ||
1da177e4 LT |
246 | /* The function in 2.2 was invalid, producing wrong result for |
247 | * check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */ | |
248 | static inline | |
249 | int ip_decrease_ttl(struct iphdr *iph) | |
250 | { | |
5c78f275 AV |
251 | u32 check = (__force u32)iph->check; |
252 | check += (__force u32)htons(0x0100); | |
253 | iph->check = (__force __sum16)(check + (check>=0xFFFF)); | |
1da177e4 LT |
254 | return --iph->ttl; |
255 | } | |
256 | ||
257 | static inline | |
258 | int ip_dont_fragment(struct sock *sk, struct dst_entry *dst) | |
259 | { | |
a02cec21 | 260 | return inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO || |
1da177e4 | 261 | (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT && |
a02cec21 | 262 | !(dst_metric_locked(dst, RTAX_MTU))); |
1da177e4 LT |
263 | } |
264 | ||
265 | extern void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more); | |
266 | ||
267 | static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, struct sock *sk) | |
268 | { | |
269 | if (iph->frag_off & htons(IP_DF)) { | |
270 | /* This is only to work around buggy Windows95/2000 | |
271 | * VJ compression implementations. If the ID field | |
272 | * does not change, they drop every other packet in | |
273 | * a TCP stream using header compression. | |
274 | */ | |
c720c7e8 ED |
275 | iph->id = (sk && inet_sk(sk)->inet_daddr) ? |
276 | htons(inet_sk(sk)->inet_id++) : 0; | |
1da177e4 LT |
277 | } else |
278 | __ip_select_ident(iph, dst, 0); | |
279 | } | |
280 | ||
281 | static inline void ip_select_ident_more(struct iphdr *iph, struct dst_entry *dst, struct sock *sk, int more) | |
282 | { | |
283 | if (iph->frag_off & htons(IP_DF)) { | |
c720c7e8 ED |
284 | if (sk && inet_sk(sk)->inet_daddr) { |
285 | iph->id = htons(inet_sk(sk)->inet_id); | |
286 | inet_sk(sk)->inet_id += 1 + more; | |
1da177e4 LT |
287 | } else |
288 | iph->id = 0; | |
289 | } else | |
290 | __ip_select_ident(iph, dst, more); | |
291 | } | |
292 | ||
293 | /* | |
294 | * Map a multicast IP onto multicast MAC for type ethernet. | |
295 | */ | |
296 | ||
714e85be | 297 | static inline void ip_eth_mc_map(__be32 naddr, char *buf) |
1da177e4 | 298 | { |
714e85be | 299 | __u32 addr=ntohl(naddr); |
1da177e4 LT |
300 | buf[0]=0x01; |
301 | buf[1]=0x00; | |
302 | buf[2]=0x5e; | |
303 | buf[5]=addr&0xFF; | |
304 | addr>>=8; | |
305 | buf[4]=addr&0xFF; | |
306 | addr>>=8; | |
307 | buf[3]=addr&0x7F; | |
308 | } | |
309 | ||
310 | /* | |
311 | * Map a multicast IP onto multicast MAC for type IP-over-InfiniBand. | |
312 | * Leave P_Key as 0 to be filled in by driver. | |
313 | */ | |
314 | ||
a9e527e3 | 315 | static inline void ip_ib_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf) |
1da177e4 | 316 | { |
714e85be | 317 | __u32 addr; |
a9e527e3 RM |
318 | unsigned char scope = broadcast[5] & 0xF; |
319 | ||
1da177e4 LT |
320 | buf[0] = 0; /* Reserved */ |
321 | buf[1] = 0xff; /* Multicast QPN */ | |
322 | buf[2] = 0xff; | |
323 | buf[3] = 0xff; | |
714e85be | 324 | addr = ntohl(naddr); |
1da177e4 | 325 | buf[4] = 0xff; |
a9e527e3 | 326 | buf[5] = 0x10 | scope; /* scope from broadcast address */ |
1da177e4 LT |
327 | buf[6] = 0x40; /* IPv4 signature */ |
328 | buf[7] = 0x1b; | |
a9e527e3 RM |
329 | buf[8] = broadcast[8]; /* P_Key */ |
330 | buf[9] = broadcast[9]; | |
1da177e4 LT |
331 | buf[10] = 0; |
332 | buf[11] = 0; | |
333 | buf[12] = 0; | |
334 | buf[13] = 0; | |
335 | buf[14] = 0; | |
336 | buf[15] = 0; | |
337 | buf[19] = addr & 0xff; | |
338 | addr >>= 8; | |
339 | buf[18] = addr & 0xff; | |
340 | addr >>= 8; | |
341 | buf[17] = addr & 0xff; | |
342 | addr >>= 8; | |
343 | buf[16] = addr & 0x0f; | |
344 | } | |
345 | ||
93ca3bb5 TT |
346 | static inline void ip_ipgre_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf) |
347 | { | |
348 | if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) | |
349 | memcpy(buf, broadcast, 4); | |
350 | else | |
351 | memcpy(buf, &naddr, sizeof(naddr)); | |
352 | } | |
353 | ||
dfd56b8b | 354 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
355 | #include <linux/ipv6.h> |
356 | #endif | |
357 | ||
358 | static __inline__ void inet_reset_saddr(struct sock *sk) | |
359 | { | |
c720c7e8 | 360 | inet_sk(sk)->inet_rcv_saddr = inet_sk(sk)->inet_saddr = 0; |
dfd56b8b | 361 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
362 | if (sk->sk_family == PF_INET6) { |
363 | struct ipv6_pinfo *np = inet6_sk(sk); | |
364 | ||
365 | memset(&np->saddr, 0, sizeof(np->saddr)); | |
366 | memset(&np->rcv_saddr, 0, sizeof(np->rcv_saddr)); | |
367 | } | |
368 | #endif | |
369 | } | |
370 | ||
371 | #endif | |
372 | ||
7ad6848c OP |
373 | static inline int sk_mc_loop(struct sock *sk) |
374 | { | |
375 | if (!sk) | |
376 | return 1; | |
377 | switch (sk->sk_family) { | |
378 | case AF_INET: | |
379 | return inet_sk(sk)->mc_loop; | |
dfd56b8b | 380 | #if IS_ENABLED(CONFIG_IPV6) |
7ad6848c OP |
381 | case AF_INET6: |
382 | return inet6_sk(sk)->mc_loop; | |
383 | #endif | |
384 | } | |
cd65c3c7 | 385 | WARN_ON(1); |
7ad6848c OP |
386 | return 1; |
387 | } | |
388 | ||
ba57b4db | 389 | extern bool ip_call_ra_chain(struct sk_buff *skb); |
1da177e4 LT |
390 | |
391 | /* | |
b798232f | 392 | * Functions provided by ip_fragment.c |
1da177e4 LT |
393 | */ |
394 | ||
fd2c3ef7 | 395 | enum ip_defrag_users { |
1da177e4 LT |
396 | IP_DEFRAG_LOCAL_DELIVER, |
397 | IP_DEFRAG_CALL_RA_CHAIN, | |
398 | IP_DEFRAG_CONNTRACK_IN, | |
4be929be | 399 | __IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
1da177e4 | 400 | IP_DEFRAG_CONNTRACK_OUT, |
4be929be | 401 | __IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 402 | IP_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 403 | __IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
1da177e4 LT |
404 | IP_DEFRAG_VS_IN, |
405 | IP_DEFRAG_VS_OUT, | |
595fc71b DM |
406 | IP_DEFRAG_VS_FWD, |
407 | IP_DEFRAG_AF_PACKET, | |
bc416d97 | 408 | IP_DEFRAG_MACVLAN, |
1da177e4 LT |
409 | }; |
410 | ||
776c729e | 411 | int ip_defrag(struct sk_buff *skb, u32 user); |
bc416d97 ED |
412 | #ifdef CONFIG_INET |
413 | struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user); | |
414 | #else | |
415 | static inline struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user) | |
416 | { | |
417 | return skb; | |
418 | } | |
419 | #endif | |
6ddc0822 | 420 | int ip_frag_mem(struct net *net); |
e5a2bb84 | 421 | int ip_frag_nqueues(struct net *net); |
1da177e4 LT |
422 | |
423 | /* | |
424 | * Functions provided by ip_forward.c | |
425 | */ | |
426 | ||
427 | extern int ip_forward(struct sk_buff *skb); | |
1da177e4 LT |
428 | |
429 | /* | |
430 | * Functions provided by ip_options.c | |
431 | */ | |
432 | ||
f6d8bd05 ED |
433 | extern void ip_options_build(struct sk_buff *skb, struct ip_options *opt, |
434 | __be32 daddr, struct rtable *rt, int is_frag); | |
1da177e4 LT |
435 | extern int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb); |
436 | extern void ip_options_fragment(struct sk_buff *skb); | |
0e6bd4a1 DL |
437 | extern int ip_options_compile(struct net *net, |
438 | struct ip_options *opt, struct sk_buff *skb); | |
f6d8bd05 | 439 | extern int ip_options_get(struct net *net, struct ip_options_rcu **optp, |
4c6ea29d | 440 | unsigned char *data, int optlen); |
f6d8bd05 | 441 | extern int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp, |
4c6ea29d | 442 | unsigned char __user *data, int optlen); |
1da177e4 LT |
443 | extern void ip_options_undo(struct ip_options * opt); |
444 | extern void ip_forward_options(struct sk_buff *skb); | |
445 | extern int ip_options_rcv_srr(struct sk_buff *skb); | |
446 | ||
447 | /* | |
448 | * Functions provided by ip_sockglue.c | |
449 | */ | |
450 | ||
d826eb14 | 451 | extern void ipv4_pktinfo_prepare(struct sk_buff *skb); |
1da177e4 | 452 | extern void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb); |
7a6adb92 DL |
453 | extern int ip_cmsg_send(struct net *net, |
454 | struct msghdr *msg, struct ipcm_cookie *ipc); | |
b7058842 | 455 | extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen); |
1da177e4 | 456 | extern int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen); |
3fdadf7d | 457 | extern int compat_ip_setsockopt(struct sock *sk, int level, |
b7058842 | 458 | int optname, char __user *optval, unsigned int optlen); |
3fdadf7d DM |
459 | extern int compat_ip_getsockopt(struct sock *sk, int level, |
460 | int optname, char __user *optval, int __user *optlen); | |
1da177e4 LT |
461 | extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *)); |
462 | ||
463 | extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len); | |
464 | extern void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, | |
35986b32 | 465 | __be16 port, u32 info, u8 *payload); |
0579016e | 466 | extern void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport, |
1da177e4 LT |
467 | u32 info); |
468 | ||
20380731 ACM |
469 | #ifdef CONFIG_PROC_FS |
470 | extern int ip_misc_proc_init(void); | |
471 | #endif | |
472 | ||
1da177e4 | 473 | #endif /* _IP_H */ |