Commit | Line | Data |
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136cdc71 KK |
1 | /* |
2 | * Transparent proxy support for Linux/iptables | |
3 | * | |
4 | * Copyright (C) 2007-2008 BalaBit IT Ltd. | |
5 | * Author: Krisztian Kovacs | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
ff67e4e4 | 12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
136cdc71 KK |
13 | #include <linux/module.h> |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/netfilter/x_tables.h> | |
16 | #include <linux/netfilter_ipv4/ip_tables.h> | |
17 | #include <net/tcp.h> | |
18 | #include <net/udp.h> | |
19 | #include <net/icmp.h> | |
20 | #include <net/sock.h> | |
21 | #include <net/inet_sock.h> | |
136cdc71 | 22 | #include <net/netfilter/ipv4/nf_defrag_ipv4.h> |
f6318e55 | 23 | |
c0cd1156 | 24 | #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) |
f6318e55 KK |
25 | #define XT_SOCKET_HAVE_IPV6 1 |
26 | #include <linux/netfilter_ipv6/ip6_tables.h> | |
93742cf8 | 27 | #include <net/inet6_hashtables.h> |
b64c9256 | 28 | #include <net/netfilter/ipv6/nf_defrag_ipv6.h> |
f6318e55 | 29 | #endif |
136cdc71 | 30 | |
a31e1ffd LAT |
31 | #include <linux/netfilter/xt_socket.h> |
32 | ||
c0cd1156 | 33 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
136cdc71 KK |
34 | #define XT_SOCKET_HAVE_CONNTRACK 1 |
35 | #include <net/netfilter/nf_conntrack.h> | |
36 | #endif | |
37 | ||
38 | static int | |
b64c9256 | 39 | extract_icmp4_fields(const struct sk_buff *skb, |
136cdc71 KK |
40 | u8 *protocol, |
41 | __be32 *raddr, | |
42 | __be32 *laddr, | |
43 | __be16 *rport, | |
44 | __be16 *lport) | |
45 | { | |
46 | unsigned int outside_hdrlen = ip_hdrlen(skb); | |
47 | struct iphdr *inside_iph, _inside_iph; | |
48 | struct icmphdr *icmph, _icmph; | |
49 | __be16 *ports, _ports[2]; | |
50 | ||
51 | icmph = skb_header_pointer(skb, outside_hdrlen, | |
52 | sizeof(_icmph), &_icmph); | |
53 | if (icmph == NULL) | |
54 | return 1; | |
55 | ||
56 | switch (icmph->type) { | |
57 | case ICMP_DEST_UNREACH: | |
58 | case ICMP_SOURCE_QUENCH: | |
59 | case ICMP_REDIRECT: | |
60 | case ICMP_TIME_EXCEEDED: | |
61 | case ICMP_PARAMETERPROB: | |
62 | break; | |
63 | default: | |
64 | return 1; | |
65 | } | |
66 | ||
67 | inside_iph = skb_header_pointer(skb, outside_hdrlen + | |
68 | sizeof(struct icmphdr), | |
69 | sizeof(_inside_iph), &_inside_iph); | |
70 | if (inside_iph == NULL) | |
71 | return 1; | |
72 | ||
73 | if (inside_iph->protocol != IPPROTO_TCP && | |
74 | inside_iph->protocol != IPPROTO_UDP) | |
75 | return 1; | |
76 | ||
77 | ports = skb_header_pointer(skb, outside_hdrlen + | |
78 | sizeof(struct icmphdr) + | |
79 | (inside_iph->ihl << 2), | |
80 | sizeof(_ports), &_ports); | |
81 | if (ports == NULL) | |
82 | return 1; | |
83 | ||
84 | /* the inside IP packet is the one quoted from our side, thus | |
85 | * its saddr is the local address */ | |
86 | *protocol = inside_iph->protocol; | |
87 | *laddr = inside_iph->saddr; | |
88 | *lport = ports[0]; | |
89 | *raddr = inside_iph->daddr; | |
90 | *rport = ports[1]; | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
93742cf8 FW |
95 | /* "socket" match based redirection (no specific rule) |
96 | * =================================================== | |
97 | * | |
98 | * There are connections with dynamic endpoints (e.g. FTP data | |
99 | * connection) that the user is unable to add explicit rules | |
100 | * for. These are taken care of by a generic "socket" rule. It is | |
101 | * assumed that the proxy application is trusted to open such | |
102 | * connections without explicit iptables rule (except of course the | |
103 | * generic 'socket' rule). In this case the following sockets are | |
104 | * matched in preference order: | |
105 | * | |
106 | * - match: if there's a fully established connection matching the | |
107 | * _packet_ tuple | |
108 | * | |
109 | * - match: if there's a non-zero bound listener (possibly with a | |
110 | * non-local address) We don't accept zero-bound listeners, since | |
111 | * then local services could intercept traffic going through the | |
112 | * box. | |
113 | */ | |
114 | static struct sock * | |
a583636a CG |
115 | xt_socket_get_sock_v4(struct net *net, struct sk_buff *skb, const int doff, |
116 | const u8 protocol, | |
93742cf8 FW |
117 | const __be32 saddr, const __be32 daddr, |
118 | const __be16 sport, const __be16 dport, | |
119 | const struct net_device *in) | |
120 | { | |
121 | switch (protocol) { | |
122 | case IPPROTO_TCP: | |
a583636a | 123 | return __inet_lookup(net, &tcp_hashinfo, skb, doff, |
93742cf8 FW |
124 | saddr, sport, daddr, dport, |
125 | in->ifindex); | |
126 | case IPPROTO_UDP: | |
127 | return udp4_lib_lookup(net, saddr, sport, daddr, dport, | |
128 | in->ifindex); | |
129 | } | |
130 | return NULL; | |
131 | } | |
132 | ||
a9407000 ED |
133 | static bool xt_socket_sk_is_transparent(struct sock *sk) |
134 | { | |
135 | switch (sk->sk_state) { | |
136 | case TCP_TIME_WAIT: | |
137 | return inet_twsk(sk)->tw_transparent; | |
138 | ||
139 | case TCP_NEW_SYN_RECV: | |
140 | return inet_rsk(inet_reqsk(sk))->no_srccheck; | |
141 | ||
142 | default: | |
143 | return inet_sk(sk)->transparent; | |
144 | } | |
145 | } | |
146 | ||
686c9b50 EB |
147 | static struct sock *xt_socket_lookup_slow_v4(struct net *net, |
148 | const struct sk_buff *skb, | |
d64d80a2 | 149 | const struct net_device *indev) |
136cdc71 KK |
150 | { |
151 | const struct iphdr *iph = ip_hdr(skb); | |
a583636a CG |
152 | struct sk_buff *data_skb = NULL; |
153 | int doff = 0; | |
6703aa74 PNA |
154 | __be32 uninitialized_var(daddr), uninitialized_var(saddr); |
155 | __be16 uninitialized_var(dport), uninitialized_var(sport); | |
156 | u8 uninitialized_var(protocol); | |
136cdc71 KK |
157 | #ifdef XT_SOCKET_HAVE_CONNTRACK |
158 | struct nf_conn const *ct; | |
159 | enum ip_conntrack_info ctinfo; | |
160 | #endif | |
161 | ||
162 | if (iph->protocol == IPPROTO_UDP || iph->protocol == IPPROTO_TCP) { | |
d64d80a2 DB |
163 | struct udphdr _hdr, *hp; |
164 | ||
136cdc71 KK |
165 | hp = skb_header_pointer(skb, ip_hdrlen(skb), |
166 | sizeof(_hdr), &_hdr); | |
167 | if (hp == NULL) | |
d64d80a2 | 168 | return NULL; |
136cdc71 KK |
169 | |
170 | protocol = iph->protocol; | |
171 | saddr = iph->saddr; | |
172 | sport = hp->source; | |
173 | daddr = iph->daddr; | |
174 | dport = hp->dest; | |
a583636a CG |
175 | data_skb = (struct sk_buff *)skb; |
176 | doff = iph->protocol == IPPROTO_TCP ? | |
177 | ip_hdrlen(skb) + __tcp_hdrlen((struct tcphdr *)hp) : | |
178 | ip_hdrlen(skb) + sizeof(*hp); | |
136cdc71 KK |
179 | |
180 | } else if (iph->protocol == IPPROTO_ICMP) { | |
b64c9256 | 181 | if (extract_icmp4_fields(skb, &protocol, &saddr, &daddr, |
d64d80a2 DB |
182 | &sport, &dport)) |
183 | return NULL; | |
136cdc71 | 184 | } else { |
d64d80a2 | 185 | return NULL; |
136cdc71 KK |
186 | } |
187 | ||
188 | #ifdef XT_SOCKET_HAVE_CONNTRACK | |
d64d80a2 DB |
189 | /* Do the lookup with the original socket address in |
190 | * case this is a reply packet of an established | |
191 | * SNAT-ted connection. | |
192 | */ | |
136cdc71 | 193 | ct = nf_ct_get(skb, &ctinfo); |
5bfddbd4 | 194 | if (ct && !nf_ct_is_untracked(ct) && |
136cdc71 | 195 | ((iph->protocol != IPPROTO_ICMP && |
fb048833 | 196 | ctinfo == IP_CT_ESTABLISHED_REPLY) || |
136cdc71 | 197 | (iph->protocol == IPPROTO_ICMP && |
fb048833 | 198 | ctinfo == IP_CT_RELATED_REPLY)) && |
136cdc71 KK |
199 | (ct->status & IPS_SRC_NAT_DONE)) { |
200 | ||
201 | daddr = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip; | |
202 | dport = (iph->protocol == IPPROTO_TCP) ? | |
203 | ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.tcp.port : | |
204 | ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.udp.port; | |
205 | } | |
206 | #endif | |
207 | ||
a583636a CG |
208 | return xt_socket_get_sock_v4(net, data_skb, doff, protocol, saddr, |
209 | daddr, sport, dport, indev); | |
d64d80a2 DB |
210 | } |
211 | ||
212 | static bool | |
213 | socket_match(const struct sk_buff *skb, struct xt_action_param *par, | |
214 | const struct xt_socket_mtinfo1 *info) | |
215 | { | |
01555e74 | 216 | struct sk_buff *pskb = (struct sk_buff *)skb; |
d64d80a2 DB |
217 | struct sock *sk = skb->sk; |
218 | ||
00028aa3 | 219 | if (!sk) |
686c9b50 | 220 | sk = xt_socket_lookup_slow_v4(par->net, skb, par->in); |
00028aa3 | 221 | if (sk) { |
a31e1ffd LAT |
222 | bool wildcard; |
223 | bool transparent = true; | |
224 | ||
681f130f ED |
225 | /* Ignore sockets listening on INADDR_ANY, |
226 | * unless XT_SOCKET_NOWILDCARD is set | |
227 | */ | |
228 | wildcard = (!(info->flags & XT_SOCKET_NOWILDCARD) && | |
a9407000 | 229 | sk_fullsock(sk) && |
c720c7e8 | 230 | inet_sk(sk)->inet_rcv_saddr == 0); |
a31e1ffd LAT |
231 | |
232 | /* Ignore non-transparent sockets, | |
a9407000 ED |
233 | * if XT_SOCKET_TRANSPARENT is used |
234 | */ | |
baf60efa | 235 | if (info->flags & XT_SOCKET_TRANSPARENT) |
a9407000 | 236 | transparent = xt_socket_sk_is_transparent(sk); |
136cdc71 | 237 | |
01555e74 HH |
238 | if (info->flags & XT_SOCKET_RESTORESKMARK && !wildcard && |
239 | transparent) | |
240 | pskb->mark = sk->sk_mark; | |
241 | ||
00028aa3 | 242 | if (sk != skb->sk) |
1a8bf6ee | 243 | sock_gen_put(sk); |
a31e1ffd LAT |
244 | |
245 | if (wildcard || !transparent) | |
136cdc71 KK |
246 | sk = NULL; |
247 | } | |
248 | ||
d64d80a2 | 249 | return sk != NULL; |
136cdc71 KK |
250 | } |
251 | ||
a31e1ffd | 252 | static bool |
b64c9256 | 253 | socket_mt4_v0(const struct sk_buff *skb, struct xt_action_param *par) |
a31e1ffd | 254 | { |
baf60efa ED |
255 | static struct xt_socket_mtinfo1 xt_info_v0 = { |
256 | .flags = 0, | |
257 | }; | |
258 | ||
259 | return socket_match(skb, par, &xt_info_v0); | |
a31e1ffd LAT |
260 | } |
261 | ||
262 | static bool | |
01555e74 | 263 | socket_mt4_v1_v2_v3(const struct sk_buff *skb, struct xt_action_param *par) |
a31e1ffd LAT |
264 | { |
265 | return socket_match(skb, par, par->matchinfo); | |
266 | } | |
267 | ||
f6318e55 | 268 | #ifdef XT_SOCKET_HAVE_IPV6 |
b64c9256 BS |
269 | |
270 | static int | |
271 | extract_icmp6_fields(const struct sk_buff *skb, | |
272 | unsigned int outside_hdrlen, | |
089282fb | 273 | int *protocol, |
78296c97 ED |
274 | const struct in6_addr **raddr, |
275 | const struct in6_addr **laddr, | |
b64c9256 | 276 | __be16 *rport, |
78296c97 ED |
277 | __be16 *lport, |
278 | struct ipv6hdr *ipv6_var) | |
b64c9256 | 279 | { |
78296c97 | 280 | const struct ipv6hdr *inside_iph; |
b64c9256 BS |
281 | struct icmp6hdr *icmph, _icmph; |
282 | __be16 *ports, _ports[2]; | |
283 | u8 inside_nexthdr; | |
75f2811c | 284 | __be16 inside_fragoff; |
b64c9256 BS |
285 | int inside_hdrlen; |
286 | ||
287 | icmph = skb_header_pointer(skb, outside_hdrlen, | |
288 | sizeof(_icmph), &_icmph); | |
289 | if (icmph == NULL) | |
290 | return 1; | |
291 | ||
292 | if (icmph->icmp6_type & ICMPV6_INFOMSG_MASK) | |
293 | return 1; | |
294 | ||
78296c97 ED |
295 | inside_iph = skb_header_pointer(skb, outside_hdrlen + sizeof(_icmph), |
296 | sizeof(*ipv6_var), ipv6_var); | |
b64c9256 BS |
297 | if (inside_iph == NULL) |
298 | return 1; | |
299 | inside_nexthdr = inside_iph->nexthdr; | |
300 | ||
78296c97 ED |
301 | inside_hdrlen = ipv6_skip_exthdr(skb, outside_hdrlen + sizeof(_icmph) + |
302 | sizeof(*ipv6_var), | |
75f2811c | 303 | &inside_nexthdr, &inside_fragoff); |
b64c9256 BS |
304 | if (inside_hdrlen < 0) |
305 | return 1; /* hjm: Packet has no/incomplete transport layer headers. */ | |
306 | ||
307 | if (inside_nexthdr != IPPROTO_TCP && | |
308 | inside_nexthdr != IPPROTO_UDP) | |
309 | return 1; | |
310 | ||
311 | ports = skb_header_pointer(skb, inside_hdrlen, | |
312 | sizeof(_ports), &_ports); | |
313 | if (ports == NULL) | |
314 | return 1; | |
315 | ||
316 | /* the inside IP packet is the one quoted from our side, thus | |
317 | * its saddr is the local address */ | |
318 | *protocol = inside_nexthdr; | |
319 | *laddr = &inside_iph->saddr; | |
320 | *lport = ports[0]; | |
321 | *raddr = &inside_iph->daddr; | |
322 | *rport = ports[1]; | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
93742cf8 | 327 | static struct sock * |
a583636a CG |
328 | xt_socket_get_sock_v6(struct net *net, struct sk_buff *skb, int doff, |
329 | const u8 protocol, | |
93742cf8 FW |
330 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
331 | const __be16 sport, const __be16 dport, | |
332 | const struct net_device *in) | |
333 | { | |
334 | switch (protocol) { | |
335 | case IPPROTO_TCP: | |
a583636a | 336 | return inet6_lookup(net, &tcp_hashinfo, skb, doff, |
93742cf8 FW |
337 | saddr, sport, daddr, dport, |
338 | in->ifindex); | |
339 | case IPPROTO_UDP: | |
340 | return udp6_lib_lookup(net, saddr, sport, daddr, dport, | |
341 | in->ifindex); | |
342 | } | |
343 | ||
344 | return NULL; | |
345 | } | |
346 | ||
686c9b50 EB |
347 | static struct sock *xt_socket_lookup_slow_v6(struct net *net, |
348 | const struct sk_buff *skb, | |
d64d80a2 | 349 | const struct net_device *indev) |
b64c9256 | 350 | { |
6703aa74 | 351 | __be16 uninitialized_var(dport), uninitialized_var(sport); |
d64d80a2 DB |
352 | const struct in6_addr *daddr = NULL, *saddr = NULL; |
353 | struct ipv6hdr *iph = ipv6_hdr(skb); | |
a583636a CG |
354 | struct sk_buff *data_skb = NULL; |
355 | int doff = 0; | |
d64d80a2 | 356 | int thoff = 0, tproto; |
b64c9256 | 357 | |
84018f55 | 358 | tproto = ipv6_find_hdr(skb, &thoff, -1, NULL, NULL); |
b64c9256 BS |
359 | if (tproto < 0) { |
360 | pr_debug("unable to find transport header in IPv6 packet, dropping\n"); | |
d64d80a2 | 361 | return NULL; |
b64c9256 BS |
362 | } |
363 | ||
364 | if (tproto == IPPROTO_UDP || tproto == IPPROTO_TCP) { | |
d64d80a2 DB |
365 | struct udphdr _hdr, *hp; |
366 | ||
367 | hp = skb_header_pointer(skb, thoff, sizeof(_hdr), &_hdr); | |
b64c9256 | 368 | if (hp == NULL) |
d64d80a2 | 369 | return NULL; |
b64c9256 BS |
370 | |
371 | saddr = &iph->saddr; | |
372 | sport = hp->source; | |
373 | daddr = &iph->daddr; | |
374 | dport = hp->dest; | |
a583636a CG |
375 | data_skb = (struct sk_buff *)skb; |
376 | doff = tproto == IPPROTO_TCP ? | |
377 | thoff + __tcp_hdrlen((struct tcphdr *)hp) : | |
378 | thoff + sizeof(*hp); | |
b64c9256 BS |
379 | |
380 | } else if (tproto == IPPROTO_ICMPV6) { | |
d64d80a2 DB |
381 | struct ipv6hdr ipv6_var; |
382 | ||
b64c9256 | 383 | if (extract_icmp6_fields(skb, thoff, &tproto, &saddr, &daddr, |
78296c97 | 384 | &sport, &dport, &ipv6_var)) |
d64d80a2 | 385 | return NULL; |
b64c9256 | 386 | } else { |
d64d80a2 | 387 | return NULL; |
b64c9256 BS |
388 | } |
389 | ||
a583636a | 390 | return xt_socket_get_sock_v6(net, data_skb, doff, tproto, saddr, daddr, |
d64d80a2 DB |
391 | sport, dport, indev); |
392 | } | |
393 | ||
394 | static bool | |
01555e74 | 395 | socket_mt6_v1_v2_v3(const struct sk_buff *skb, struct xt_action_param *par) |
d64d80a2 DB |
396 | { |
397 | const struct xt_socket_mtinfo1 *info = (struct xt_socket_mtinfo1 *) par->matchinfo; | |
01555e74 | 398 | struct sk_buff *pskb = (struct sk_buff *)skb; |
d64d80a2 DB |
399 | struct sock *sk = skb->sk; |
400 | ||
00028aa3 | 401 | if (!sk) |
686c9b50 | 402 | sk = xt_socket_lookup_slow_v6(par->net, skb, par->in); |
00028aa3 | 403 | if (sk) { |
b64c9256 BS |
404 | bool wildcard; |
405 | bool transparent = true; | |
406 | ||
681f130f ED |
407 | /* Ignore sockets listening on INADDR_ANY |
408 | * unless XT_SOCKET_NOWILDCARD is set | |
409 | */ | |
410 | wildcard = (!(info->flags & XT_SOCKET_NOWILDCARD) && | |
a9407000 | 411 | sk_fullsock(sk) && |
efe4208f | 412 | ipv6_addr_any(&sk->sk_v6_rcv_saddr)); |
b64c9256 BS |
413 | |
414 | /* Ignore non-transparent sockets, | |
a9407000 ED |
415 | * if XT_SOCKET_TRANSPARENT is used |
416 | */ | |
baf60efa | 417 | if (info->flags & XT_SOCKET_TRANSPARENT) |
a9407000 | 418 | transparent = xt_socket_sk_is_transparent(sk); |
b64c9256 | 419 | |
01555e74 HH |
420 | if (info->flags & XT_SOCKET_RESTORESKMARK && !wildcard && |
421 | transparent) | |
422 | pskb->mark = sk->sk_mark; | |
423 | ||
00028aa3 | 424 | if (sk != skb->sk) |
1a8bf6ee | 425 | sock_gen_put(sk); |
b64c9256 BS |
426 | |
427 | if (wildcard || !transparent) | |
428 | sk = NULL; | |
429 | } | |
430 | ||
d64d80a2 | 431 | return sk != NULL; |
b64c9256 BS |
432 | } |
433 | #endif | |
434 | ||
681f130f ED |
435 | static int socket_mt_v1_check(const struct xt_mtchk_param *par) |
436 | { | |
437 | const struct xt_socket_mtinfo1 *info = (struct xt_socket_mtinfo1 *) par->matchinfo; | |
438 | ||
439 | if (info->flags & ~XT_SOCKET_FLAGS_V1) { | |
440 | pr_info("unknown flags 0x%x\n", info->flags & ~XT_SOCKET_FLAGS_V1); | |
441 | return -EINVAL; | |
442 | } | |
443 | return 0; | |
444 | } | |
445 | ||
446 | static int socket_mt_v2_check(const struct xt_mtchk_param *par) | |
447 | { | |
448 | const struct xt_socket_mtinfo2 *info = (struct xt_socket_mtinfo2 *) par->matchinfo; | |
449 | ||
450 | if (info->flags & ~XT_SOCKET_FLAGS_V2) { | |
451 | pr_info("unknown flags 0x%x\n", info->flags & ~XT_SOCKET_FLAGS_V2); | |
452 | return -EINVAL; | |
453 | } | |
454 | return 0; | |
455 | } | |
456 | ||
01555e74 HH |
457 | static int socket_mt_v3_check(const struct xt_mtchk_param *par) |
458 | { | |
459 | const struct xt_socket_mtinfo3 *info = | |
460 | (struct xt_socket_mtinfo3 *)par->matchinfo; | |
461 | ||
462 | if (info->flags & ~XT_SOCKET_FLAGS_V3) { | |
463 | pr_info("unknown flags 0x%x\n", | |
464 | info->flags & ~XT_SOCKET_FLAGS_V3); | |
465 | return -EINVAL; | |
466 | } | |
467 | return 0; | |
468 | } | |
469 | ||
a31e1ffd LAT |
470 | static struct xt_match socket_mt_reg[] __read_mostly = { |
471 | { | |
472 | .name = "socket", | |
473 | .revision = 0, | |
474 | .family = NFPROTO_IPV4, | |
b64c9256 | 475 | .match = socket_mt4_v0, |
aa3c487f JE |
476 | .hooks = (1 << NF_INET_PRE_ROUTING) | |
477 | (1 << NF_INET_LOCAL_IN), | |
a31e1ffd LAT |
478 | .me = THIS_MODULE, |
479 | }, | |
480 | { | |
481 | .name = "socket", | |
482 | .revision = 1, | |
483 | .family = NFPROTO_IPV4, | |
01555e74 | 484 | .match = socket_mt4_v1_v2_v3, |
681f130f | 485 | .checkentry = socket_mt_v1_check, |
a31e1ffd | 486 | .matchsize = sizeof(struct xt_socket_mtinfo1), |
aa3c487f JE |
487 | .hooks = (1 << NF_INET_PRE_ROUTING) | |
488 | (1 << NF_INET_LOCAL_IN), | |
a31e1ffd LAT |
489 | .me = THIS_MODULE, |
490 | }, | |
f6318e55 | 491 | #ifdef XT_SOCKET_HAVE_IPV6 |
b64c9256 BS |
492 | { |
493 | .name = "socket", | |
494 | .revision = 1, | |
495 | .family = NFPROTO_IPV6, | |
01555e74 | 496 | .match = socket_mt6_v1_v2_v3, |
681f130f ED |
497 | .checkentry = socket_mt_v1_check, |
498 | .matchsize = sizeof(struct xt_socket_mtinfo1), | |
499 | .hooks = (1 << NF_INET_PRE_ROUTING) | | |
500 | (1 << NF_INET_LOCAL_IN), | |
501 | .me = THIS_MODULE, | |
502 | }, | |
503 | #endif | |
504 | { | |
505 | .name = "socket", | |
506 | .revision = 2, | |
507 | .family = NFPROTO_IPV4, | |
01555e74 | 508 | .match = socket_mt4_v1_v2_v3, |
681f130f ED |
509 | .checkentry = socket_mt_v2_check, |
510 | .matchsize = sizeof(struct xt_socket_mtinfo1), | |
511 | .hooks = (1 << NF_INET_PRE_ROUTING) | | |
512 | (1 << NF_INET_LOCAL_IN), | |
513 | .me = THIS_MODULE, | |
514 | }, | |
515 | #ifdef XT_SOCKET_HAVE_IPV6 | |
516 | { | |
517 | .name = "socket", | |
518 | .revision = 2, | |
519 | .family = NFPROTO_IPV6, | |
01555e74 | 520 | .match = socket_mt6_v1_v2_v3, |
681f130f | 521 | .checkentry = socket_mt_v2_check, |
b64c9256 BS |
522 | .matchsize = sizeof(struct xt_socket_mtinfo1), |
523 | .hooks = (1 << NF_INET_PRE_ROUTING) | | |
524 | (1 << NF_INET_LOCAL_IN), | |
525 | .me = THIS_MODULE, | |
526 | }, | |
01555e74 HH |
527 | #endif |
528 | { | |
529 | .name = "socket", | |
530 | .revision = 3, | |
531 | .family = NFPROTO_IPV4, | |
532 | .match = socket_mt4_v1_v2_v3, | |
533 | .checkentry = socket_mt_v3_check, | |
534 | .matchsize = sizeof(struct xt_socket_mtinfo1), | |
535 | .hooks = (1 << NF_INET_PRE_ROUTING) | | |
536 | (1 << NF_INET_LOCAL_IN), | |
537 | .me = THIS_MODULE, | |
538 | }, | |
539 | #ifdef XT_SOCKET_HAVE_IPV6 | |
540 | { | |
541 | .name = "socket", | |
542 | .revision = 3, | |
543 | .family = NFPROTO_IPV6, | |
544 | .match = socket_mt6_v1_v2_v3, | |
545 | .checkentry = socket_mt_v3_check, | |
546 | .matchsize = sizeof(struct xt_socket_mtinfo1), | |
547 | .hooks = (1 << NF_INET_PRE_ROUTING) | | |
548 | (1 << NF_INET_LOCAL_IN), | |
549 | .me = THIS_MODULE, | |
550 | }, | |
b64c9256 | 551 | #endif |
136cdc71 KK |
552 | }; |
553 | ||
554 | static int __init socket_mt_init(void) | |
555 | { | |
556 | nf_defrag_ipv4_enable(); | |
f6318e55 | 557 | #ifdef XT_SOCKET_HAVE_IPV6 |
b64c9256 BS |
558 | nf_defrag_ipv6_enable(); |
559 | #endif | |
560 | ||
a31e1ffd | 561 | return xt_register_matches(socket_mt_reg, ARRAY_SIZE(socket_mt_reg)); |
136cdc71 KK |
562 | } |
563 | ||
564 | static void __exit socket_mt_exit(void) | |
565 | { | |
a31e1ffd | 566 | xt_unregister_matches(socket_mt_reg, ARRAY_SIZE(socket_mt_reg)); |
136cdc71 KK |
567 | } |
568 | ||
569 | module_init(socket_mt_init); | |
570 | module_exit(socket_mt_exit); | |
571 | ||
572 | MODULE_LICENSE("GPL"); | |
573 | MODULE_AUTHOR("Krisztian Kovacs, Balazs Scheidler"); | |
574 | MODULE_DESCRIPTION("x_tables socket match module"); | |
575 | MODULE_ALIAS("ipt_socket"); | |
b64c9256 | 576 | MODULE_ALIAS("ip6t_socket"); |