Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C)2004 USAGI/WIDE Project |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * Author: |
| 9 | * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
| 10 | * |
| 11 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
| 12 | * - support Layer 3 protocol independent connection tracking. |
| 13 | * Based on the original ip_conntrack code which had the following |
| 14 | * copyright information: |
| 15 | * (C) 1999-2001 Paul `Rusty' Russell |
| 16 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> |
| 17 | * |
| 18 | * 23 Mar 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
| 19 | * - add get_features() to support various size of conntrack |
| 20 | * structures. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/config.h> |
| 24 | #include <linux/types.h> |
| 25 | #include <linux/ipv6.h> |
| 26 | #include <linux/in6.h> |
| 27 | #include <linux/netfilter.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/skbuff.h> |
| 30 | #include <linux/icmp.h> |
| 31 | #include <linux/sysctl.h> |
| 32 | #include <net/ipv6.h> |
| 33 | |
| 34 | #include <linux/netfilter_ipv6.h> |
| 35 | #include <net/netfilter/nf_conntrack.h> |
| 36 | #include <net/netfilter/nf_conntrack_helper.h> |
| 37 | #include <net/netfilter/nf_conntrack_protocol.h> |
| 38 | #include <net/netfilter/nf_conntrack_l3proto.h> |
| 39 | #include <net/netfilter/nf_conntrack_core.h> |
| 40 | |
| 41 | #if 0 |
| 42 | #define DEBUGP printk |
| 43 | #else |
| 44 | #define DEBUGP(format, args...) |
| 45 | #endif |
| 46 | |
| 47 | DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat); |
| 48 | |
| 49 | static int ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, |
| 50 | struct nf_conntrack_tuple *tuple) |
| 51 | { |
| 52 | u_int32_t _addrs[8], *ap; |
| 53 | |
| 54 | ap = skb_header_pointer(skb, nhoff + offsetof(struct ipv6hdr, saddr), |
| 55 | sizeof(_addrs), _addrs); |
| 56 | if (ap == NULL) |
| 57 | return 0; |
| 58 | |
| 59 | memcpy(tuple->src.u3.ip6, ap, sizeof(tuple->src.u3.ip6)); |
| 60 | memcpy(tuple->dst.u3.ip6, ap + 4, sizeof(tuple->dst.u3.ip6)); |
| 61 | |
| 62 | return 1; |
| 63 | } |
| 64 | |
| 65 | static int ipv6_invert_tuple(struct nf_conntrack_tuple *tuple, |
| 66 | const struct nf_conntrack_tuple *orig) |
| 67 | { |
| 68 | memcpy(tuple->src.u3.ip6, orig->dst.u3.ip6, sizeof(tuple->src.u3.ip6)); |
| 69 | memcpy(tuple->dst.u3.ip6, orig->src.u3.ip6, sizeof(tuple->dst.u3.ip6)); |
| 70 | |
| 71 | return 1; |
| 72 | } |
| 73 | |
| 74 | static int ipv6_print_tuple(struct seq_file *s, |
| 75 | const struct nf_conntrack_tuple *tuple) |
| 76 | { |
Joe Perches | 46b86a2 | 2006-01-13 14:29:07 -0800 | [diff] [blame] | 77 | return seq_printf(s, "src=" NIP6_FMT " dst=" NIP6_FMT " ", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 78 | NIP6(*((struct in6_addr *)tuple->src.u3.ip6)), |
| 79 | NIP6(*((struct in6_addr *)tuple->dst.u3.ip6))); |
| 80 | } |
| 81 | |
| 82 | static int ipv6_print_conntrack(struct seq_file *s, |
| 83 | const struct nf_conn *conntrack) |
| 84 | { |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | /* |
| 89 | * Based on ipv6_skip_exthdr() in net/ipv6/exthdr.c |
| 90 | * |
| 91 | * This function parses (probably truncated) exthdr set "hdr" |
| 92 | * of length "len". "nexthdrp" initially points to some place, |
| 93 | * where type of the first header can be found. |
| 94 | * |
| 95 | * It skips all well-known exthdrs, and returns pointer to the start |
| 96 | * of unparsable area i.e. the first header with unknown type. |
| 97 | * if success, *nexthdr is updated by type/protocol of this header. |
| 98 | * |
| 99 | * NOTES: - it may return pointer pointing beyond end of packet, |
| 100 | * if the last recognized header is truncated in the middle. |
| 101 | * - if packet is truncated, so that all parsed headers are skipped, |
| 102 | * it returns -1. |
| 103 | * - if packet is fragmented, return pointer of the fragment header. |
| 104 | * - ESP is unparsable for now and considered like |
| 105 | * normal payload protocol. |
| 106 | * - Note also special handling of AUTH header. Thanks to IPsec wizards. |
| 107 | */ |
| 108 | |
| 109 | int nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp, |
| 110 | int len) |
| 111 | { |
| 112 | u8 nexthdr = *nexthdrp; |
| 113 | |
| 114 | while (ipv6_ext_hdr(nexthdr)) { |
| 115 | struct ipv6_opt_hdr hdr; |
| 116 | int hdrlen; |
| 117 | |
| 118 | if (len < (int)sizeof(struct ipv6_opt_hdr)) |
| 119 | return -1; |
| 120 | if (nexthdr == NEXTHDR_NONE) |
| 121 | break; |
| 122 | if (nexthdr == NEXTHDR_FRAGMENT) |
| 123 | break; |
| 124 | if (skb_copy_bits(skb, start, &hdr, sizeof(hdr))) |
| 125 | BUG(); |
| 126 | if (nexthdr == NEXTHDR_AUTH) |
| 127 | hdrlen = (hdr.hdrlen+2)<<2; |
| 128 | else |
| 129 | hdrlen = ipv6_optlen(&hdr); |
| 130 | |
| 131 | nexthdr = hdr.nexthdr; |
| 132 | len -= hdrlen; |
| 133 | start += hdrlen; |
| 134 | } |
| 135 | |
| 136 | *nexthdrp = nexthdr; |
| 137 | return start; |
| 138 | } |
| 139 | |
| 140 | static int |
| 141 | ipv6_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff, |
| 142 | u_int8_t *protonum) |
| 143 | { |
| 144 | unsigned int extoff; |
| 145 | unsigned char pnum; |
| 146 | int protoff; |
| 147 | |
| 148 | extoff = (u8*)((*pskb)->nh.ipv6h + 1) - (*pskb)->data; |
| 149 | pnum = (*pskb)->nh.ipv6h->nexthdr; |
| 150 | |
| 151 | protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum, |
| 152 | (*pskb)->len - extoff); |
| 153 | |
| 154 | /* |
| 155 | * (protoff == (*pskb)->len) mean that the packet doesn't have no data |
| 156 | * except of IPv6 & ext headers. but it's tracked anyway. - YK |
| 157 | */ |
| 158 | if ((protoff < 0) || (protoff > (*pskb)->len)) { |
| 159 | DEBUGP("ip6_conntrack_core: can't find proto in pkt\n"); |
| 160 | NF_CT_STAT_INC(error); |
| 161 | NF_CT_STAT_INC(invalid); |
| 162 | return -NF_ACCEPT; |
| 163 | } |
| 164 | |
| 165 | *dataoff = protoff; |
| 166 | *protonum = pnum; |
| 167 | return NF_ACCEPT; |
| 168 | } |
| 169 | |
| 170 | static u_int32_t ipv6_get_features(const struct nf_conntrack_tuple *tuple) |
| 171 | { |
| 172 | return NF_CT_F_BASIC; |
| 173 | } |
| 174 | |
| 175 | static unsigned int ipv6_confirm(unsigned int hooknum, |
| 176 | struct sk_buff **pskb, |
| 177 | const struct net_device *in, |
| 178 | const struct net_device *out, |
| 179 | int (*okfn)(struct sk_buff *)) |
| 180 | { |
| 181 | struct nf_conn *ct; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 182 | struct nf_conn_help *help; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 183 | enum ip_conntrack_info ctinfo; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 184 | unsigned int ret, protoff; |
| 185 | unsigned int extoff = (u8*)((*pskb)->nh.ipv6h + 1) |
| 186 | - (*pskb)->data; |
| 187 | unsigned char pnum = (*pskb)->nh.ipv6h->nexthdr; |
| 188 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 189 | |
| 190 | /* This is where we call the helper: as the packet goes out. */ |
| 191 | ct = nf_ct_get(*pskb, &ctinfo); |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 192 | if (!ct) |
| 193 | goto out; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 194 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 195 | help = nfct_help(ct); |
| 196 | if (!help || !help->helper) |
| 197 | goto out; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 198 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 199 | protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum, |
| 200 | (*pskb)->len - extoff); |
| 201 | if (protoff < 0 || protoff > (*pskb)->len || |
| 202 | pnum == NEXTHDR_FRAGMENT) { |
| 203 | DEBUGP("proto header not found\n"); |
| 204 | return NF_ACCEPT; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 205 | } |
| 206 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 207 | ret = help->helper->help(pskb, protoff, ct, ctinfo); |
| 208 | if (ret != NF_ACCEPT) |
| 209 | return ret; |
| 210 | out: |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 211 | /* We've seen it coming out the other side: confirm it */ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 212 | return nf_conntrack_confirm(pskb); |
| 213 | } |
| 214 | |
| 215 | extern struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb); |
| 216 | extern void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb, |
| 217 | struct net_device *in, |
| 218 | struct net_device *out, |
| 219 | int (*okfn)(struct sk_buff *)); |
| 220 | static unsigned int ipv6_defrag(unsigned int hooknum, |
| 221 | struct sk_buff **pskb, |
| 222 | const struct net_device *in, |
| 223 | const struct net_device *out, |
| 224 | int (*okfn)(struct sk_buff *)) |
| 225 | { |
| 226 | struct sk_buff *reasm; |
| 227 | |
| 228 | /* Previously seen (loopback)? */ |
| 229 | if ((*pskb)->nfct) |
| 230 | return NF_ACCEPT; |
| 231 | |
| 232 | reasm = nf_ct_frag6_gather(*pskb); |
| 233 | |
| 234 | /* queued */ |
| 235 | if (reasm == NULL) |
| 236 | return NF_STOLEN; |
| 237 | |
| 238 | /* error occured or not fragmented */ |
| 239 | if (reasm == *pskb) |
| 240 | return NF_ACCEPT; |
| 241 | |
| 242 | nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in, |
| 243 | (struct net_device *)out, okfn); |
| 244 | |
| 245 | return NF_STOLEN; |
| 246 | } |
| 247 | |
| 248 | static unsigned int ipv6_conntrack_in(unsigned int hooknum, |
| 249 | struct sk_buff **pskb, |
| 250 | const struct net_device *in, |
| 251 | const struct net_device *out, |
| 252 | int (*okfn)(struct sk_buff *)) |
| 253 | { |
| 254 | struct sk_buff *reasm = (*pskb)->nfct_reasm; |
| 255 | |
| 256 | /* This packet is fragmented and has reassembled packet. */ |
| 257 | if (reasm) { |
| 258 | /* Reassembled packet isn't parsed yet ? */ |
| 259 | if (!reasm->nfct) { |
| 260 | unsigned int ret; |
| 261 | |
| 262 | ret = nf_conntrack_in(PF_INET6, hooknum, &reasm); |
| 263 | if (ret != NF_ACCEPT) |
| 264 | return ret; |
| 265 | } |
| 266 | nf_conntrack_get(reasm->nfct); |
| 267 | (*pskb)->nfct = reasm->nfct; |
| 268 | return NF_ACCEPT; |
| 269 | } |
| 270 | |
| 271 | return nf_conntrack_in(PF_INET6, hooknum, pskb); |
| 272 | } |
| 273 | |
| 274 | static unsigned int ipv6_conntrack_local(unsigned int hooknum, |
| 275 | struct sk_buff **pskb, |
| 276 | const struct net_device *in, |
| 277 | const struct net_device *out, |
| 278 | int (*okfn)(struct sk_buff *)) |
| 279 | { |
| 280 | /* root is playing with raw sockets. */ |
| 281 | if ((*pskb)->len < sizeof(struct ipv6hdr)) { |
| 282 | if (net_ratelimit()) |
| 283 | printk("ipv6_conntrack_local: packet too short\n"); |
| 284 | return NF_ACCEPT; |
| 285 | } |
| 286 | return ipv6_conntrack_in(hooknum, pskb, in, out, okfn); |
| 287 | } |
| 288 | |
| 289 | /* Connection tracking may drop packets, but never alters them, so |
| 290 | make it the first hook. */ |
| 291 | static struct nf_hook_ops ipv6_conntrack_defrag_ops = { |
| 292 | .hook = ipv6_defrag, |
| 293 | .owner = THIS_MODULE, |
| 294 | .pf = PF_INET6, |
| 295 | .hooknum = NF_IP6_PRE_ROUTING, |
| 296 | .priority = NF_IP6_PRI_CONNTRACK_DEFRAG, |
| 297 | }; |
| 298 | |
| 299 | static struct nf_hook_ops ipv6_conntrack_in_ops = { |
| 300 | .hook = ipv6_conntrack_in, |
| 301 | .owner = THIS_MODULE, |
| 302 | .pf = PF_INET6, |
| 303 | .hooknum = NF_IP6_PRE_ROUTING, |
| 304 | .priority = NF_IP6_PRI_CONNTRACK, |
| 305 | }; |
| 306 | |
| 307 | static struct nf_hook_ops ipv6_conntrack_local_out_ops = { |
| 308 | .hook = ipv6_conntrack_local, |
| 309 | .owner = THIS_MODULE, |
| 310 | .pf = PF_INET6, |
| 311 | .hooknum = NF_IP6_LOCAL_OUT, |
| 312 | .priority = NF_IP6_PRI_CONNTRACK, |
| 313 | }; |
| 314 | |
| 315 | static struct nf_hook_ops ipv6_conntrack_defrag_local_out_ops = { |
| 316 | .hook = ipv6_defrag, |
| 317 | .owner = THIS_MODULE, |
| 318 | .pf = PF_INET6, |
| 319 | .hooknum = NF_IP6_LOCAL_OUT, |
| 320 | .priority = NF_IP6_PRI_CONNTRACK_DEFRAG, |
| 321 | }; |
| 322 | |
| 323 | /* Refragmenter; last chance. */ |
| 324 | static struct nf_hook_ops ipv6_conntrack_out_ops = { |
| 325 | .hook = ipv6_confirm, |
| 326 | .owner = THIS_MODULE, |
| 327 | .pf = PF_INET6, |
| 328 | .hooknum = NF_IP6_POST_ROUTING, |
| 329 | .priority = NF_IP6_PRI_LAST, |
| 330 | }; |
| 331 | |
| 332 | static struct nf_hook_ops ipv6_conntrack_local_in_ops = { |
| 333 | .hook = ipv6_confirm, |
| 334 | .owner = THIS_MODULE, |
| 335 | .pf = PF_INET6, |
| 336 | .hooknum = NF_IP6_LOCAL_IN, |
| 337 | .priority = NF_IP6_PRI_LAST-1, |
| 338 | }; |
| 339 | |
| 340 | #ifdef CONFIG_SYSCTL |
| 341 | |
| 342 | /* From nf_conntrack_proto_icmpv6.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 343 | extern unsigned int nf_ct_icmpv6_timeout; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 344 | |
| 345 | /* From nf_conntrack_frag6.c */ |
Patrick McHardy | babbdb1 | 2006-01-09 17:48:09 -0800 | [diff] [blame] | 346 | extern unsigned int nf_ct_frag6_timeout; |
Yasuyuki Kozakai | 7686a02 | 2005-11-14 15:27:43 -0800 | [diff] [blame] | 347 | extern unsigned int nf_ct_frag6_low_thresh; |
| 348 | extern unsigned int nf_ct_frag6_high_thresh; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 349 | |
| 350 | static struct ctl_table_header *nf_ct_ipv6_sysctl_header; |
| 351 | |
| 352 | static ctl_table nf_ct_sysctl_table[] = { |
| 353 | { |
| 354 | .ctl_name = NET_NF_CONNTRACK_ICMPV6_TIMEOUT, |
| 355 | .procname = "nf_conntrack_icmpv6_timeout", |
| 356 | .data = &nf_ct_icmpv6_timeout, |
| 357 | .maxlen = sizeof(unsigned int), |
| 358 | .mode = 0644, |
| 359 | .proc_handler = &proc_dointvec_jiffies, |
| 360 | }, |
| 361 | { |
| 362 | .ctl_name = NET_NF_CONNTRACK_FRAG6_TIMEOUT, |
| 363 | .procname = "nf_conntrack_frag6_timeout", |
| 364 | .data = &nf_ct_frag6_timeout, |
| 365 | .maxlen = sizeof(unsigned int), |
| 366 | .mode = 0644, |
| 367 | .proc_handler = &proc_dointvec_jiffies, |
| 368 | }, |
| 369 | { |
| 370 | .ctl_name = NET_NF_CONNTRACK_FRAG6_LOW_THRESH, |
| 371 | .procname = "nf_conntrack_frag6_low_thresh", |
| 372 | .data = &nf_ct_frag6_low_thresh, |
| 373 | .maxlen = sizeof(unsigned int), |
| 374 | .mode = 0644, |
Yasuyuki Kozakai | 7686a02 | 2005-11-14 15:27:43 -0800 | [diff] [blame] | 375 | .proc_handler = &proc_dointvec, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 376 | }, |
| 377 | { |
| 378 | .ctl_name = NET_NF_CONNTRACK_FRAG6_HIGH_THRESH, |
| 379 | .procname = "nf_conntrack_frag6_high_thresh", |
| 380 | .data = &nf_ct_frag6_high_thresh, |
| 381 | .maxlen = sizeof(unsigned int), |
| 382 | .mode = 0644, |
Yasuyuki Kozakai | 7686a02 | 2005-11-14 15:27:43 -0800 | [diff] [blame] | 383 | .proc_handler = &proc_dointvec, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 384 | }, |
| 385 | { .ctl_name = 0 } |
| 386 | }; |
| 387 | |
| 388 | static ctl_table nf_ct_netfilter_table[] = { |
| 389 | { |
| 390 | .ctl_name = NET_NETFILTER, |
| 391 | .procname = "netfilter", |
| 392 | .mode = 0555, |
| 393 | .child = nf_ct_sysctl_table, |
| 394 | }, |
| 395 | { .ctl_name = 0 } |
| 396 | }; |
| 397 | |
| 398 | static ctl_table nf_ct_net_table[] = { |
| 399 | { |
| 400 | .ctl_name = CTL_NET, |
| 401 | .procname = "net", |
| 402 | .mode = 0555, |
| 403 | .child = nf_ct_netfilter_table, |
| 404 | }, |
| 405 | { .ctl_name = 0 } |
| 406 | }; |
| 407 | #endif |
| 408 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 409 | #if defined(CONFIG_NF_CT_NETLINK) || \ |
| 410 | defined(CONFIG_NF_CT_NETLINK_MODULE) |
| 411 | |
| 412 | #include <linux/netfilter/nfnetlink.h> |
| 413 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 414 | |
| 415 | static int ipv6_tuple_to_nfattr(struct sk_buff *skb, |
| 416 | const struct nf_conntrack_tuple *tuple) |
| 417 | { |
| 418 | NFA_PUT(skb, CTA_IP_V6_SRC, sizeof(u_int32_t) * 4, |
| 419 | &tuple->src.u3.ip6); |
| 420 | NFA_PUT(skb, CTA_IP_V6_DST, sizeof(u_int32_t) * 4, |
| 421 | &tuple->dst.u3.ip6); |
| 422 | return 0; |
| 423 | |
| 424 | nfattr_failure: |
| 425 | return -1; |
| 426 | } |
| 427 | |
| 428 | static const size_t cta_min_ip[CTA_IP_MAX] = { |
| 429 | [CTA_IP_V6_SRC-1] = sizeof(u_int32_t)*4, |
| 430 | [CTA_IP_V6_DST-1] = sizeof(u_int32_t)*4, |
| 431 | }; |
| 432 | |
| 433 | static int ipv6_nfattr_to_tuple(struct nfattr *tb[], |
| 434 | struct nf_conntrack_tuple *t) |
| 435 | { |
| 436 | if (!tb[CTA_IP_V6_SRC-1] || !tb[CTA_IP_V6_DST-1]) |
| 437 | return -EINVAL; |
| 438 | |
| 439 | if (nfattr_bad_size(tb, CTA_IP_MAX, cta_min_ip)) |
| 440 | return -EINVAL; |
| 441 | |
| 442 | memcpy(&t->src.u3.ip6, NFA_DATA(tb[CTA_IP_V6_SRC-1]), |
| 443 | sizeof(u_int32_t) * 4); |
| 444 | memcpy(&t->dst.u3.ip6, NFA_DATA(tb[CTA_IP_V6_DST-1]), |
| 445 | sizeof(u_int32_t) * 4); |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | #endif |
| 450 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 451 | struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = { |
| 452 | .l3proto = PF_INET6, |
| 453 | .name = "ipv6", |
| 454 | .pkt_to_tuple = ipv6_pkt_to_tuple, |
| 455 | .invert_tuple = ipv6_invert_tuple, |
| 456 | .print_tuple = ipv6_print_tuple, |
| 457 | .print_conntrack = ipv6_print_conntrack, |
| 458 | .prepare = ipv6_prepare, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 459 | #if defined(CONFIG_NF_CT_NETLINK) || \ |
| 460 | defined(CONFIG_NF_CT_NETLINK_MODULE) |
| 461 | .tuple_to_nfattr = ipv6_tuple_to_nfattr, |
| 462 | .nfattr_to_tuple = ipv6_nfattr_to_tuple, |
| 463 | #endif |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 464 | .get_features = ipv6_get_features, |
| 465 | .me = THIS_MODULE, |
| 466 | }; |
| 467 | |
| 468 | extern struct nf_conntrack_protocol nf_conntrack_protocol_tcp6; |
| 469 | extern struct nf_conntrack_protocol nf_conntrack_protocol_udp6; |
| 470 | extern struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6; |
| 471 | extern int nf_ct_frag6_init(void); |
| 472 | extern void nf_ct_frag6_cleanup(void); |
| 473 | static int init_or_cleanup(int init) |
| 474 | { |
| 475 | int ret = 0; |
| 476 | |
| 477 | if (!init) goto cleanup; |
| 478 | |
| 479 | ret = nf_ct_frag6_init(); |
| 480 | if (ret < 0) { |
| 481 | printk("nf_conntrack_ipv6: can't initialize frag6.\n"); |
| 482 | goto cleanup_nothing; |
| 483 | } |
| 484 | ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_tcp6); |
| 485 | if (ret < 0) { |
| 486 | printk("nf_conntrack_ipv6: can't register tcp.\n"); |
| 487 | goto cleanup_frag6; |
| 488 | } |
| 489 | |
| 490 | ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_udp6); |
| 491 | if (ret < 0) { |
| 492 | printk("nf_conntrack_ipv6: can't register udp.\n"); |
| 493 | goto cleanup_tcp; |
| 494 | } |
| 495 | |
| 496 | ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_icmpv6); |
| 497 | if (ret < 0) { |
| 498 | printk("nf_conntrack_ipv6: can't register icmpv6.\n"); |
| 499 | goto cleanup_udp; |
| 500 | } |
| 501 | |
| 502 | ret = nf_conntrack_l3proto_register(&nf_conntrack_l3proto_ipv6); |
| 503 | if (ret < 0) { |
| 504 | printk("nf_conntrack_ipv6: can't register ipv6\n"); |
| 505 | goto cleanup_icmpv6; |
| 506 | } |
| 507 | |
| 508 | ret = nf_register_hook(&ipv6_conntrack_defrag_ops); |
| 509 | if (ret < 0) { |
| 510 | printk("nf_conntrack_ipv6: can't register pre-routing defrag " |
| 511 | "hook.\n"); |
| 512 | goto cleanup_ipv6; |
| 513 | } |
| 514 | |
| 515 | ret = nf_register_hook(&ipv6_conntrack_defrag_local_out_ops); |
| 516 | if (ret < 0) { |
| 517 | printk("nf_conntrack_ipv6: can't register local_out defrag " |
| 518 | "hook.\n"); |
| 519 | goto cleanup_defragops; |
| 520 | } |
| 521 | |
| 522 | ret = nf_register_hook(&ipv6_conntrack_in_ops); |
| 523 | if (ret < 0) { |
| 524 | printk("nf_conntrack_ipv6: can't register pre-routing hook.\n"); |
| 525 | goto cleanup_defraglocalops; |
| 526 | } |
| 527 | |
| 528 | ret = nf_register_hook(&ipv6_conntrack_local_out_ops); |
| 529 | if (ret < 0) { |
| 530 | printk("nf_conntrack_ipv6: can't register local out hook.\n"); |
| 531 | goto cleanup_inops; |
| 532 | } |
| 533 | |
| 534 | ret = nf_register_hook(&ipv6_conntrack_out_ops); |
| 535 | if (ret < 0) { |
| 536 | printk("nf_conntrack_ipv6: can't register post-routing hook.\n"); |
| 537 | goto cleanup_inandlocalops; |
| 538 | } |
| 539 | |
| 540 | ret = nf_register_hook(&ipv6_conntrack_local_in_ops); |
| 541 | if (ret < 0) { |
| 542 | printk("nf_conntrack_ipv6: can't register local in hook.\n"); |
| 543 | goto cleanup_inoutandlocalops; |
| 544 | } |
| 545 | |
| 546 | #ifdef CONFIG_SYSCTL |
| 547 | nf_ct_ipv6_sysctl_header = register_sysctl_table(nf_ct_net_table, 0); |
| 548 | if (nf_ct_ipv6_sysctl_header == NULL) { |
| 549 | printk("nf_conntrack: can't register to sysctl.\n"); |
| 550 | ret = -ENOMEM; |
| 551 | goto cleanup_localinops; |
| 552 | } |
| 553 | #endif |
| 554 | return ret; |
| 555 | |
| 556 | cleanup: |
| 557 | synchronize_net(); |
| 558 | #ifdef CONFIG_SYSCTL |
| 559 | unregister_sysctl_table(nf_ct_ipv6_sysctl_header); |
| 560 | cleanup_localinops: |
| 561 | #endif |
| 562 | nf_unregister_hook(&ipv6_conntrack_local_in_ops); |
| 563 | cleanup_inoutandlocalops: |
| 564 | nf_unregister_hook(&ipv6_conntrack_out_ops); |
| 565 | cleanup_inandlocalops: |
| 566 | nf_unregister_hook(&ipv6_conntrack_local_out_ops); |
| 567 | cleanup_inops: |
| 568 | nf_unregister_hook(&ipv6_conntrack_in_ops); |
| 569 | cleanup_defraglocalops: |
| 570 | nf_unregister_hook(&ipv6_conntrack_defrag_local_out_ops); |
| 571 | cleanup_defragops: |
| 572 | nf_unregister_hook(&ipv6_conntrack_defrag_ops); |
| 573 | cleanup_ipv6: |
| 574 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6); |
| 575 | cleanup_icmpv6: |
| 576 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_icmpv6); |
| 577 | cleanup_udp: |
| 578 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_udp6); |
| 579 | cleanup_tcp: |
| 580 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp6); |
| 581 | cleanup_frag6: |
| 582 | nf_ct_frag6_cleanup(); |
| 583 | cleanup_nothing: |
| 584 | return ret; |
| 585 | } |
| 586 | |
Pablo Neira Ayuso | b9f78f9 | 2006-03-22 13:56:08 -0800 | [diff] [blame] | 587 | MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6)); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 588 | MODULE_LICENSE("GPL"); |
| 589 | MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>"); |
| 590 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 591 | static int __init nf_conntrack_l3proto_ipv6_init(void) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 592 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 593 | need_conntrack(); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 594 | return init_or_cleanup(1); |
| 595 | } |
| 596 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 597 | static void __exit nf_conntrack_l3proto_ipv6_fini(void) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 598 | { |
| 599 | init_or_cleanup(0); |
| 600 | } |
| 601 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 602 | module_init(nf_conntrack_l3proto_ipv6_init); |
| 603 | module_exit(nf_conntrack_l3proto_ipv6_fini); |