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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> | |
aa661581 | 31 | #include <net/route.h> |
1da177e4 | 32 | #include <net/snmp.h> |
86b08d86 | 33 | #include <net/flow.h> |
1da177e4 LT |
34 | |
35 | struct sock; | |
36 | ||
fd2c3ef7 | 37 | struct inet_skb_parm { |
1da177e4 LT |
38 | struct ip_options opt; /* Compiled IP options */ |
39 | unsigned char flags; | |
40 | ||
8cdfab8a PM |
41 | #define IPSKB_FORWARDED 1 |
42 | #define IPSKB_XFRM_TUNNEL_SIZE 2 | |
3e3850e9 PM |
43 | #define IPSKB_XFRM_TRANSFORMED 4 |
44 | #define IPSKB_FRAG_COMPLETE 8 | |
48d5cad8 | 45 | #define IPSKB_REROUTED 16 |
5f2d04f1 PM |
46 | |
47 | u16 frag_max_size; | |
1da177e4 LT |
48 | }; |
49 | ||
c9bdd4b5 ACM |
50 | static inline unsigned int ip_hdrlen(const struct sk_buff *skb) |
51 | { | |
eddc9ec5 | 52 | return ip_hdr(skb)->ihl * 4; |
c9bdd4b5 ACM |
53 | } |
54 | ||
fd2c3ef7 | 55 | struct ipcm_cookie { |
c1d18f9f | 56 | __be32 addr; |
1da177e4 | 57 | int oif; |
f6d8bd05 | 58 | struct ip_options_rcu *opt; |
2244d07b | 59 | __u8 tx_flags; |
f02db315 FF |
60 | __u8 ttl; |
61 | __s16 tos; | |
62 | char priority; | |
1da177e4 LT |
63 | }; |
64 | ||
65 | #define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb)) | |
4b261c75 | 66 | #define PKTINFO_SKB_CB(skb) ((struct in_pktinfo *)((skb)->cb)) |
1da177e4 | 67 | |
fd2c3ef7 | 68 | struct ip_ra_chain { |
43a951e9 | 69 | struct ip_ra_chain __rcu *next; |
1da177e4 | 70 | struct sock *sk; |
592fcb9d ED |
71 | union { |
72 | void (*destructor)(struct sock *); | |
73 | struct sock *saved_sk; | |
74 | }; | |
66018506 | 75 | struct rcu_head rcu; |
1da177e4 LT |
76 | }; |
77 | ||
43a951e9 | 78 | extern struct ip_ra_chain __rcu *ip_ra_chain; |
1da177e4 LT |
79 | |
80 | /* IP flags. */ | |
81 | #define IP_CE 0x8000 /* Flag: "Congestion" */ | |
82 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ | |
83 | #define IP_MF 0x2000 /* Flag: "More Fragments" */ | |
84 | #define IP_OFFSET 0x1FFF /* "Fragment Offset" part */ | |
85 | ||
86 | #define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */ | |
87 | ||
14c85021 ACM |
88 | struct msghdr; |
89 | struct net_device; | |
90 | struct packet_type; | |
91 | struct rtable; | |
14c85021 ACM |
92 | struct sockaddr; |
93 | ||
72c1d3bd | 94 | int igmp_mc_init(void); |
1da177e4 LT |
95 | |
96 | /* | |
97 | * Functions provided by ip.c | |
98 | */ | |
99 | ||
5c3a0fd7 JP |
100 | int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk, |
101 | __be32 saddr, __be32 daddr, | |
102 | struct ip_options_rcu *opt); | |
103 | int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, | |
104 | struct net_device *orig_dev); | |
105 | int ip_local_deliver(struct sk_buff *skb); | |
106 | int ip_mr_input(struct sk_buff *skb); | |
aad88724 ED |
107 | int ip_output(struct sock *sk, struct sk_buff *skb); |
108 | int ip_mc_output(struct sock *sk, struct sk_buff *skb); | |
5c3a0fd7 JP |
109 | int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *)); |
110 | int ip_do_nat(struct sk_buff *skb); | |
111 | void ip_send_check(struct iphdr *ip); | |
112 | int __ip_local_out(struct sk_buff *skb); | |
aad88724 ED |
113 | int ip_local_out_sk(struct sock *sk, struct sk_buff *skb); |
114 | static inline int ip_local_out(struct sk_buff *skb) | |
115 | { | |
116 | return ip_local_out_sk(skb->sk, skb); | |
117 | } | |
118 | ||
b0270e91 | 119 | int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl); |
5c3a0fd7 JP |
120 | void ip_init(void); |
121 | int ip_append_data(struct sock *sk, struct flowi4 *fl4, | |
122 | int getfrag(void *from, char *to, int offset, int len, | |
123 | int odd, struct sk_buff *skb), | |
124 | void *from, int len, int protolen, | |
125 | struct ipcm_cookie *ipc, | |
126 | struct rtable **rt, | |
127 | unsigned int flags); | |
128 | int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, | |
129 | struct sk_buff *skb); | |
130 | ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page, | |
131 | int offset, size_t size, int flags); | |
132 | struct sk_buff *__ip_make_skb(struct sock *sk, struct flowi4 *fl4, | |
133 | struct sk_buff_head *queue, | |
134 | struct inet_cork *cork); | |
135 | int ip_send_skb(struct net *net, struct sk_buff *skb); | |
136 | int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4); | |
137 | void ip_flush_pending_frames(struct sock *sk); | |
138 | struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4, | |
139 | int getfrag(void *from, char *to, int offset, | |
140 | int len, int odd, struct sk_buff *skb), | |
141 | void *from, int length, int transhdrlen, | |
142 | struct ipcm_cookie *ipc, struct rtable **rtp, | |
143 | unsigned int flags); | |
1c32c5ad | 144 | |
77968b78 | 145 | static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4) |
1c32c5ad | 146 | { |
77968b78 | 147 | return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base); |
1c32c5ad | 148 | } |
1da177e4 | 149 | |
aa661581 FF |
150 | static inline __u8 get_rttos(struct ipcm_cookie* ipc, struct inet_sock *inet) |
151 | { | |
152 | return (ipc->tos != -1) ? RT_TOS(ipc->tos) : RT_TOS(inet->tos); | |
153 | } | |
154 | ||
155 | static inline __u8 get_rtconn_flags(struct ipcm_cookie* ipc, struct sock* sk) | |
156 | { | |
157 | return (ipc->tos != -1) ? RT_CONN_FLAGS_TOS(sk, ipc->tos) : RT_CONN_FLAGS(sk); | |
158 | } | |
159 | ||
1da177e4 | 160 | /* datagram.c */ |
5c3a0fd7 | 161 | int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len); |
1da177e4 | 162 | |
5c3a0fd7 | 163 | void ip4_datagram_release_cb(struct sock *sk); |
8141ed9f | 164 | |
1da177e4 LT |
165 | struct ip_reply_arg { |
166 | struct kvec iov[1]; | |
88ef4a5a | 167 | int flags; |
d6f5493c | 168 | __wsum csum; |
1da177e4 LT |
169 | int csumoffset; /* u16 offset of csum in iov[0].iov_base */ |
170 | /* -1 if not needed */ | |
f0e48dbf | 171 | int bound_dev_if; |
66b13d99 | 172 | u8 tos; |
1da177e4 LT |
173 | }; |
174 | ||
88ef4a5a KK |
175 | #define IP_REPLY_ARG_NOSRCCHECK 1 |
176 | ||
86b08d86 KK |
177 | static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg) |
178 | { | |
179 | return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0; | |
180 | } | |
181 | ||
be9f4a44 | 182 | void ip_send_unicast_reply(struct net *net, struct sk_buff *skb, __be32 daddr, |
70e73416 DM |
183 | __be32 saddr, const struct ip_reply_arg *arg, |
184 | unsigned int len); | |
1da177e4 | 185 | |
4ce3c183 ED |
186 | #define IP_INC_STATS(net, field) SNMP_INC_STATS64((net)->mib.ip_statistics, field) |
187 | #define IP_INC_STATS_BH(net, field) SNMP_INC_STATS64_BH((net)->mib.ip_statistics, field) | |
188 | #define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS64((net)->mib.ip_statistics, field, val) | |
189 | #define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS64_BH((net)->mib.ip_statistics, field, val) | |
190 | #define IP_UPD_PO_STATS(net, field, val) SNMP_UPD_PO_STATS64((net)->mib.ip_statistics, field, val) | |
191 | #define IP_UPD_PO_STATS_BH(net, field, val) SNMP_UPD_PO_STATS64_BH((net)->mib.ip_statistics, field, val) | |
61a7e260 PE |
192 | #define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field) |
193 | #define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field) | |
194 | #define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field) | |
f7324acd | 195 | #define NET_ADD_STATS(net, field, adnd) SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd) |
61a7e260 PE |
196 | #define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd) |
197 | #define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd) | |
1da177e4 | 198 | |
698365fa | 199 | unsigned long snmp_fold_field(void __percpu *mib, int offt); |
4ce3c183 | 200 | #if BITS_PER_LONG==32 |
698365fa | 201 | u64 snmp_fold_field64(void __percpu *mib, int offt, size_t sync_off); |
4ce3c183 | 202 | #else |
698365fa | 203 | static inline u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_off) |
4ce3c183 ED |
204 | { |
205 | return snmp_fold_field(mib, offt); | |
206 | } | |
207 | #endif | |
33490170 | 208 | |
0bbf87d8 | 209 | void inet_get_local_port_range(struct net *net, int *low, int *high); |
227b60f5 | 210 | |
e3826f1e AW |
211 | extern unsigned long *sysctl_local_reserved_ports; |
212 | static inline int inet_is_reserved_local_port(int port) | |
213 | { | |
214 | return test_bit(port, sysctl_local_reserved_ports); | |
215 | } | |
216 | ||
cdac4e07 | 217 | extern int sysctl_ip_nonlocal_bind; |
1da177e4 | 218 | |
20380731 ACM |
219 | /* From inetpeer.c */ |
220 | extern int inet_peer_threshold; | |
221 | extern int inet_peer_minttl; | |
222 | extern int inet_peer_maxttl; | |
20380731 | 223 | |
6648bd7e AD |
224 | /* From ip_input.c */ |
225 | extern int sysctl_ip_early_demux; | |
226 | ||
20380731 ACM |
227 | /* From ip_output.c */ |
228 | extern int sysctl_ip_dynaddr; | |
229 | ||
5c3a0fd7 | 230 | void ipfrag_init(void); |
20380731 | 231 | |
5c3a0fd7 | 232 | void ip_static_sysctl_init(void); |
bd7b1533 | 233 | |
e110861f LC |
234 | #define IP4_REPLY_MARK(net, mark) \ |
235 | ((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0) | |
236 | ||
d18cd551 DM |
237 | static inline bool ip_is_fragment(const struct iphdr *iph) |
238 | { | |
239 | return (iph->frag_off & htons(IP_MF | IP_OFFSET)) != 0; | |
240 | } | |
241 | ||
1da177e4 | 242 | #ifdef CONFIG_INET |
14c85021 ACM |
243 | #include <net/dst.h> |
244 | ||
1da177e4 LT |
245 | /* The function in 2.2 was invalid, producing wrong result for |
246 | * check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */ | |
247 | static inline | |
248 | int ip_decrease_ttl(struct iphdr *iph) | |
249 | { | |
5c78f275 AV |
250 | u32 check = (__force u32)iph->check; |
251 | check += (__force u32)htons(0x0100); | |
252 | iph->check = (__force __sum16)(check + (check>=0xFFFF)); | |
1da177e4 LT |
253 | return --iph->ttl; |
254 | } | |
255 | ||
256 | static inline | |
257 | int ip_dont_fragment(struct sock *sk, struct dst_entry *dst) | |
258 | { | |
a02cec21 | 259 | return inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO || |
1da177e4 | 260 | (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT && |
a02cec21 | 261 | !(dst_metric_locked(dst, RTAX_MTU))); |
1da177e4 LT |
262 | } |
263 | ||
f87c10a8 HFS |
264 | static inline bool ip_sk_accept_pmtu(const struct sock *sk) |
265 | { | |
1b346576 HFS |
266 | return inet_sk(sk)->pmtudisc != IP_PMTUDISC_INTERFACE && |
267 | inet_sk(sk)->pmtudisc != IP_PMTUDISC_OMIT; | |
f87c10a8 HFS |
268 | } |
269 | ||
270 | static inline bool ip_sk_use_pmtu(const struct sock *sk) | |
271 | { | |
272 | return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE; | |
273 | } | |
274 | ||
60ff7467 | 275 | static inline bool ip_sk_ignore_df(const struct sock *sk) |
1b346576 HFS |
276 | { |
277 | return inet_sk(sk)->pmtudisc < IP_PMTUDISC_DO || | |
278 | inet_sk(sk)->pmtudisc == IP_PMTUDISC_OMIT; | |
279 | } | |
280 | ||
f87c10a8 HFS |
281 | static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst, |
282 | bool forwarding) | |
283 | { | |
284 | struct net *net = dev_net(dst->dev); | |
285 | ||
286 | if (net->ipv4.sysctl_ip_fwd_use_pmtu || | |
287 | dst_metric_locked(dst, RTAX_MTU) || | |
288 | !forwarding) | |
289 | return dst_mtu(dst); | |
290 | ||
291 | return min(dst->dev->mtu, IP_MAX_MTU); | |
292 | } | |
293 | ||
294 | static inline unsigned int ip_skb_dst_mtu(const struct sk_buff *skb) | |
295 | { | |
296 | if (!skb->sk || ip_sk_use_pmtu(skb->sk)) { | |
297 | bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED; | |
298 | return ip_dst_mtu_maybe_forward(skb_dst(skb), forwarding); | |
299 | } else { | |
300 | return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU); | |
301 | } | |
302 | } | |
303 | ||
5c3a0fd7 | 304 | void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more); |
1da177e4 | 305 | |
703133de | 306 | static inline void ip_select_ident(struct sk_buff *skb, struct dst_entry *dst, struct sock *sk) |
1da177e4 | 307 | { |
703133de AA |
308 | struct iphdr *iph = ip_hdr(skb); |
309 | ||
60ff7467 | 310 | if ((iph->frag_off & htons(IP_DF)) && !skb->ignore_df) { |
1da177e4 LT |
311 | /* This is only to work around buggy Windows95/2000 |
312 | * VJ compression implementations. If the ID field | |
313 | * does not change, they drop every other packet in | |
314 | * a TCP stream using header compression. | |
315 | */ | |
c720c7e8 ED |
316 | iph->id = (sk && inet_sk(sk)->inet_daddr) ? |
317 | htons(inet_sk(sk)->inet_id++) : 0; | |
1da177e4 LT |
318 | } else |
319 | __ip_select_ident(iph, dst, 0); | |
320 | } | |
321 | ||
703133de | 322 | static inline void ip_select_ident_more(struct sk_buff *skb, struct dst_entry *dst, struct sock *sk, int more) |
1da177e4 | 323 | { |
703133de AA |
324 | struct iphdr *iph = ip_hdr(skb); |
325 | ||
60ff7467 | 326 | if ((iph->frag_off & htons(IP_DF)) && !skb->ignore_df) { |
c720c7e8 ED |
327 | if (sk && inet_sk(sk)->inet_daddr) { |
328 | iph->id = htons(inet_sk(sk)->inet_id); | |
329 | inet_sk(sk)->inet_id += 1 + more; | |
1da177e4 LT |
330 | } else |
331 | iph->id = 0; | |
332 | } else | |
333 | __ip_select_ident(iph, dst, more); | |
334 | } | |
335 | ||
ed70fcfc TH |
336 | static inline __wsum inet_compute_pseudo(struct sk_buff *skb, int proto) |
337 | { | |
338 | return csum_tcpudp_nofold(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, | |
339 | skb->len, proto, 0); | |
340 | } | |
341 | ||
1da177e4 LT |
342 | /* |
343 | * Map a multicast IP onto multicast MAC for type ethernet. | |
344 | */ | |
345 | ||
714e85be | 346 | static inline void ip_eth_mc_map(__be32 naddr, char *buf) |
1da177e4 | 347 | { |
714e85be | 348 | __u32 addr=ntohl(naddr); |
1da177e4 LT |
349 | buf[0]=0x01; |
350 | buf[1]=0x00; | |
351 | buf[2]=0x5e; | |
352 | buf[5]=addr&0xFF; | |
353 | addr>>=8; | |
354 | buf[4]=addr&0xFF; | |
355 | addr>>=8; | |
356 | buf[3]=addr&0x7F; | |
357 | } | |
358 | ||
359 | /* | |
360 | * Map a multicast IP onto multicast MAC for type IP-over-InfiniBand. | |
361 | * Leave P_Key as 0 to be filled in by driver. | |
362 | */ | |
363 | ||
a9e527e3 | 364 | static inline void ip_ib_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf) |
1da177e4 | 365 | { |
714e85be | 366 | __u32 addr; |
a9e527e3 RM |
367 | unsigned char scope = broadcast[5] & 0xF; |
368 | ||
1da177e4 LT |
369 | buf[0] = 0; /* Reserved */ |
370 | buf[1] = 0xff; /* Multicast QPN */ | |
371 | buf[2] = 0xff; | |
372 | buf[3] = 0xff; | |
714e85be | 373 | addr = ntohl(naddr); |
1da177e4 | 374 | buf[4] = 0xff; |
a9e527e3 | 375 | buf[5] = 0x10 | scope; /* scope from broadcast address */ |
1da177e4 LT |
376 | buf[6] = 0x40; /* IPv4 signature */ |
377 | buf[7] = 0x1b; | |
a9e527e3 RM |
378 | buf[8] = broadcast[8]; /* P_Key */ |
379 | buf[9] = broadcast[9]; | |
1da177e4 LT |
380 | buf[10] = 0; |
381 | buf[11] = 0; | |
382 | buf[12] = 0; | |
383 | buf[13] = 0; | |
384 | buf[14] = 0; | |
385 | buf[15] = 0; | |
386 | buf[19] = addr & 0xff; | |
387 | addr >>= 8; | |
388 | buf[18] = addr & 0xff; | |
389 | addr >>= 8; | |
390 | buf[17] = addr & 0xff; | |
391 | addr >>= 8; | |
392 | buf[16] = addr & 0x0f; | |
393 | } | |
394 | ||
93ca3bb5 TT |
395 | static inline void ip_ipgre_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf) |
396 | { | |
397 | if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) | |
398 | memcpy(buf, broadcast, 4); | |
399 | else | |
400 | memcpy(buf, &naddr, sizeof(naddr)); | |
401 | } | |
402 | ||
dfd56b8b | 403 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
404 | #include <linux/ipv6.h> |
405 | #endif | |
406 | ||
407 | static __inline__ void inet_reset_saddr(struct sock *sk) | |
408 | { | |
c720c7e8 | 409 | inet_sk(sk)->inet_rcv_saddr = inet_sk(sk)->inet_saddr = 0; |
dfd56b8b | 410 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 LT |
411 | if (sk->sk_family == PF_INET6) { |
412 | struct ipv6_pinfo *np = inet6_sk(sk); | |
413 | ||
414 | memset(&np->saddr, 0, sizeof(np->saddr)); | |
efe4208f | 415 | memset(&sk->sk_v6_rcv_saddr, 0, sizeof(sk->sk_v6_rcv_saddr)); |
1da177e4 LT |
416 | } |
417 | #endif | |
418 | } | |
419 | ||
420 | #endif | |
421 | ||
7ad6848c OP |
422 | static inline int sk_mc_loop(struct sock *sk) |
423 | { | |
424 | if (!sk) | |
425 | return 1; | |
426 | switch (sk->sk_family) { | |
427 | case AF_INET: | |
428 | return inet_sk(sk)->mc_loop; | |
dfd56b8b | 429 | #if IS_ENABLED(CONFIG_IPV6) |
7ad6848c OP |
430 | case AF_INET6: |
431 | return inet6_sk(sk)->mc_loop; | |
432 | #endif | |
433 | } | |
cd65c3c7 | 434 | WARN_ON(1); |
7ad6848c OP |
435 | return 1; |
436 | } | |
437 | ||
5c3a0fd7 | 438 | bool ip_call_ra_chain(struct sk_buff *skb); |
1da177e4 LT |
439 | |
440 | /* | |
b798232f | 441 | * Functions provided by ip_fragment.c |
1da177e4 LT |
442 | */ |
443 | ||
fd2c3ef7 | 444 | enum ip_defrag_users { |
1da177e4 LT |
445 | IP_DEFRAG_LOCAL_DELIVER, |
446 | IP_DEFRAG_CALL_RA_CHAIN, | |
447 | IP_DEFRAG_CONNTRACK_IN, | |
4be929be | 448 | __IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHRT_MAX, |
1da177e4 | 449 | IP_DEFRAG_CONNTRACK_OUT, |
4be929be | 450 | __IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHRT_MAX, |
8fa9ff68 | 451 | IP_DEFRAG_CONNTRACK_BRIDGE_IN, |
4be929be | 452 | __IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX, |
1da177e4 LT |
453 | IP_DEFRAG_VS_IN, |
454 | IP_DEFRAG_VS_OUT, | |
595fc71b DM |
455 | IP_DEFRAG_VS_FWD, |
456 | IP_DEFRAG_AF_PACKET, | |
bc416d97 | 457 | IP_DEFRAG_MACVLAN, |
1da177e4 LT |
458 | }; |
459 | ||
776c729e | 460 | int ip_defrag(struct sk_buff *skb, u32 user); |
bc416d97 ED |
461 | #ifdef CONFIG_INET |
462 | struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user); | |
463 | #else | |
464 | static inline struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user) | |
465 | { | |
466 | return skb; | |
467 | } | |
468 | #endif | |
6ddc0822 | 469 | int ip_frag_mem(struct net *net); |
e5a2bb84 | 470 | int ip_frag_nqueues(struct net *net); |
1da177e4 LT |
471 | |
472 | /* | |
473 | * Functions provided by ip_forward.c | |
474 | */ | |
475 | ||
5c3a0fd7 | 476 | int ip_forward(struct sk_buff *skb); |
1da177e4 LT |
477 | |
478 | /* | |
479 | * Functions provided by ip_options.c | |
480 | */ | |
481 | ||
5c3a0fd7 JP |
482 | void ip_options_build(struct sk_buff *skb, struct ip_options *opt, |
483 | __be32 daddr, struct rtable *rt, int is_frag); | |
484 | int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb); | |
485 | void ip_options_fragment(struct sk_buff *skb); | |
486 | int ip_options_compile(struct net *net, struct ip_options *opt, | |
487 | struct sk_buff *skb); | |
488 | int ip_options_get(struct net *net, struct ip_options_rcu **optp, | |
489 | unsigned char *data, int optlen); | |
490 | int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp, | |
491 | unsigned char __user *data, int optlen); | |
492 | void ip_options_undo(struct ip_options *opt); | |
493 | void ip_forward_options(struct sk_buff *skb); | |
494 | int ip_options_rcv_srr(struct sk_buff *skb); | |
1da177e4 LT |
495 | |
496 | /* | |
497 | * Functions provided by ip_sockglue.c | |
498 | */ | |
499 | ||
fbf8866d | 500 | void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb); |
5c3a0fd7 | 501 | void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb); |
c8e6ad08 HFS |
502 | int ip_cmsg_send(struct net *net, struct msghdr *msg, |
503 | struct ipcm_cookie *ipc, bool allow_ipv6); | |
5c3a0fd7 JP |
504 | int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, |
505 | unsigned int optlen); | |
506 | int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, | |
507 | int __user *optlen); | |
508 | int compat_ip_setsockopt(struct sock *sk, int level, int optname, | |
509 | char __user *optval, unsigned int optlen); | |
510 | int compat_ip_getsockopt(struct sock *sk, int level, int optname, | |
511 | char __user *optval, int __user *optlen); | |
512 | int ip_ra_control(struct sock *sk, unsigned char on, | |
513 | void (*destructor)(struct sock *)); | |
514 | ||
85fbaa75 | 515 | int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len); |
5c3a0fd7 JP |
516 | void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port, |
517 | u32 info, u8 *payload); | |
518 | void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport, | |
519 | u32 info); | |
1da177e4 | 520 | |
20380731 | 521 | #ifdef CONFIG_PROC_FS |
5c3a0fd7 | 522 | int ip_misc_proc_init(void); |
20380731 ACM |
523 | #endif |
524 | ||
1da177e4 | 525 | #endif /* _IP_H */ |