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> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 10 | */ |
| 11 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 12 | #include <linux/types.h> |
| 13 | #include <linux/ipv6.h> |
| 14 | #include <linux/in6.h> |
| 15 | #include <linux/netfilter.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/skbuff.h> |
| 18 | #include <linux/icmp.h> |
| 19 | #include <linux/sysctl.h> |
| 20 | #include <net/ipv6.h> |
Pavel Emelyanov | 04128f2 | 2007-10-15 02:33:45 -0700 | [diff] [blame^] | 21 | #include <net/inet_frag.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 22 | |
| 23 | #include <linux/netfilter_ipv6.h> |
| 24 | #include <net/netfilter/nf_conntrack.h> |
| 25 | #include <net/netfilter/nf_conntrack_helper.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 26 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 27 | #include <net/netfilter/nf_conntrack_l3proto.h> |
| 28 | #include <net/netfilter/nf_conntrack_core.h> |
| 29 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 30 | static int ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, |
| 31 | struct nf_conntrack_tuple *tuple) |
| 32 | { |
| 33 | u_int32_t _addrs[8], *ap; |
| 34 | |
| 35 | ap = skb_header_pointer(skb, nhoff + offsetof(struct ipv6hdr, saddr), |
| 36 | sizeof(_addrs), _addrs); |
| 37 | if (ap == NULL) |
| 38 | return 0; |
| 39 | |
| 40 | memcpy(tuple->src.u3.ip6, ap, sizeof(tuple->src.u3.ip6)); |
| 41 | memcpy(tuple->dst.u3.ip6, ap + 4, sizeof(tuple->dst.u3.ip6)); |
| 42 | |
| 43 | return 1; |
| 44 | } |
| 45 | |
| 46 | static int ipv6_invert_tuple(struct nf_conntrack_tuple *tuple, |
| 47 | const struct nf_conntrack_tuple *orig) |
| 48 | { |
| 49 | memcpy(tuple->src.u3.ip6, orig->dst.u3.ip6, sizeof(tuple->src.u3.ip6)); |
| 50 | memcpy(tuple->dst.u3.ip6, orig->src.u3.ip6, sizeof(tuple->dst.u3.ip6)); |
| 51 | |
| 52 | return 1; |
| 53 | } |
| 54 | |
| 55 | static int ipv6_print_tuple(struct seq_file *s, |
| 56 | const struct nf_conntrack_tuple *tuple) |
| 57 | { |
Joe Perches | 46b86a2 | 2006-01-13 14:29:07 -0800 | [diff] [blame] | 58 | return seq_printf(s, "src=" NIP6_FMT " dst=" NIP6_FMT " ", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 59 | NIP6(*((struct in6_addr *)tuple->src.u3.ip6)), |
| 60 | NIP6(*((struct in6_addr *)tuple->dst.u3.ip6))); |
| 61 | } |
| 62 | |
| 63 | static int ipv6_print_conntrack(struct seq_file *s, |
| 64 | const struct nf_conn *conntrack) |
| 65 | { |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | /* |
| 70 | * Based on ipv6_skip_exthdr() in net/ipv6/exthdr.c |
| 71 | * |
| 72 | * This function parses (probably truncated) exthdr set "hdr" |
| 73 | * of length "len". "nexthdrp" initially points to some place, |
| 74 | * where type of the first header can be found. |
| 75 | * |
| 76 | * It skips all well-known exthdrs, and returns pointer to the start |
| 77 | * of unparsable area i.e. the first header with unknown type. |
| 78 | * if success, *nexthdr is updated by type/protocol of this header. |
| 79 | * |
| 80 | * NOTES: - it may return pointer pointing beyond end of packet, |
| 81 | * if the last recognized header is truncated in the middle. |
| 82 | * - if packet is truncated, so that all parsed headers are skipped, |
| 83 | * it returns -1. |
| 84 | * - if packet is fragmented, return pointer of the fragment header. |
| 85 | * - ESP is unparsable for now and considered like |
| 86 | * normal payload protocol. |
| 87 | * - Note also special handling of AUTH header. Thanks to IPsec wizards. |
| 88 | */ |
| 89 | |
Adrian Bunk | 1a3a206 | 2007-07-30 18:04:57 -0700 | [diff] [blame] | 90 | static int nf_ct_ipv6_skip_exthdr(const struct sk_buff *skb, int start, |
| 91 | u8 *nexthdrp, int len) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 92 | { |
| 93 | u8 nexthdr = *nexthdrp; |
| 94 | |
| 95 | while (ipv6_ext_hdr(nexthdr)) { |
| 96 | struct ipv6_opt_hdr hdr; |
| 97 | int hdrlen; |
| 98 | |
| 99 | if (len < (int)sizeof(struct ipv6_opt_hdr)) |
| 100 | return -1; |
| 101 | if (nexthdr == NEXTHDR_NONE) |
| 102 | break; |
| 103 | if (nexthdr == NEXTHDR_FRAGMENT) |
| 104 | break; |
| 105 | if (skb_copy_bits(skb, start, &hdr, sizeof(hdr))) |
| 106 | BUG(); |
| 107 | if (nexthdr == NEXTHDR_AUTH) |
| 108 | hdrlen = (hdr.hdrlen+2)<<2; |
| 109 | else |
| 110 | hdrlen = ipv6_optlen(&hdr); |
| 111 | |
| 112 | nexthdr = hdr.nexthdr; |
| 113 | len -= hdrlen; |
| 114 | start += hdrlen; |
| 115 | } |
| 116 | |
| 117 | *nexthdrp = nexthdr; |
| 118 | return start; |
| 119 | } |
| 120 | |
Yasuyuki Kozakai | ffc3069 | 2007-07-14 20:44:50 -0700 | [diff] [blame] | 121 | static int ipv6_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, |
| 122 | unsigned int *dataoff, u_int8_t *protonum) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 123 | { |
Yasuyuki Kozakai | ffc3069 | 2007-07-14 20:44:50 -0700 | [diff] [blame] | 124 | unsigned int extoff = nhoff + sizeof(struct ipv6hdr); |
| 125 | unsigned char pnum; |
| 126 | int protoff; |
| 127 | |
| 128 | if (skb_copy_bits(skb, nhoff + offsetof(struct ipv6hdr, nexthdr), |
| 129 | &pnum, sizeof(pnum)) != 0) { |
| 130 | pr_debug("ip6_conntrack_core: can't get nexthdr\n"); |
| 131 | return -NF_ACCEPT; |
| 132 | } |
| 133 | protoff = nf_ct_ipv6_skip_exthdr(skb, extoff, &pnum, skb->len - extoff); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 134 | /* |
Yasuyuki Kozakai | ffc3069 | 2007-07-14 20:44:50 -0700 | [diff] [blame] | 135 | * (protoff == skb->len) mean that the packet doesn't have no data |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 136 | * except of IPv6 & ext headers. but it's tracked anyway. - YK |
| 137 | */ |
Yasuyuki Kozakai | ffc3069 | 2007-07-14 20:44:50 -0700 | [diff] [blame] | 138 | if ((protoff < 0) || (protoff > skb->len)) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 139 | pr_debug("ip6_conntrack_core: can't find proto in pkt\n"); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 140 | return -NF_ACCEPT; |
| 141 | } |
| 142 | |
| 143 | *dataoff = protoff; |
| 144 | *protonum = pnum; |
| 145 | return NF_ACCEPT; |
| 146 | } |
| 147 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 148 | static unsigned int ipv6_confirm(unsigned int hooknum, |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 149 | struct sk_buff *skb, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 150 | const struct net_device *in, |
| 151 | const struct net_device *out, |
| 152 | int (*okfn)(struct sk_buff *)) |
| 153 | { |
| 154 | struct nf_conn *ct; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 155 | struct nf_conn_help *help; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 156 | struct nf_conntrack_helper *helper; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 157 | enum ip_conntrack_info ctinfo; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 158 | unsigned int ret, protoff; |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 159 | unsigned int extoff = (u8 *)(ipv6_hdr(skb) + 1) - skb->data; |
| 160 | unsigned char pnum = ipv6_hdr(skb)->nexthdr; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 161 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 162 | |
| 163 | /* This is where we call the helper: as the packet goes out. */ |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 164 | ct = nf_ct_get(skb, &ctinfo); |
Patrick McHardy | 6442f1c | 2006-05-29 18:21:53 -0700 | [diff] [blame] | 165 | if (!ct || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY) |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 166 | goto out; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 167 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 168 | help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 169 | if (!help) |
| 170 | goto out; |
| 171 | /* rcu_read_lock()ed by nf_hook_slow */ |
| 172 | helper = rcu_dereference(help->helper); |
| 173 | if (!helper) |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 174 | goto out; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 175 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 176 | protoff = nf_ct_ipv6_skip_exthdr(skb, extoff, &pnum, |
| 177 | skb->len - extoff); |
| 178 | if (protoff > skb->len || pnum == NEXTHDR_FRAGMENT) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 179 | pr_debug("proto header not found\n"); |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 180 | return NF_ACCEPT; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 181 | } |
| 182 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 183 | ret = helper->help(skb, protoff, ct, ctinfo); |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 184 | if (ret != NF_ACCEPT) |
| 185 | return ret; |
| 186 | out: |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 187 | /* We've seen it coming out the other side: confirm it */ |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 188 | return nf_conntrack_confirm(skb); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 189 | } |
| 190 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 191 | static unsigned int ipv6_defrag(unsigned int hooknum, |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 192 | struct sk_buff *skb, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 193 | const struct net_device *in, |
| 194 | const struct net_device *out, |
| 195 | int (*okfn)(struct sk_buff *)) |
| 196 | { |
| 197 | struct sk_buff *reasm; |
| 198 | |
| 199 | /* Previously seen (loopback)? */ |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 200 | if (skb->nfct) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 201 | return NF_ACCEPT; |
| 202 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 203 | reasm = nf_ct_frag6_gather(skb); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 204 | |
| 205 | /* queued */ |
| 206 | if (reasm == NULL) |
| 207 | return NF_STOLEN; |
| 208 | |
| 209 | /* error occured or not fragmented */ |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 210 | if (reasm == skb) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 211 | return NF_ACCEPT; |
| 212 | |
| 213 | nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in, |
| 214 | (struct net_device *)out, okfn); |
| 215 | |
| 216 | return NF_STOLEN; |
| 217 | } |
| 218 | |
| 219 | static unsigned int ipv6_conntrack_in(unsigned int hooknum, |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 220 | struct sk_buff *skb, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 221 | const struct net_device *in, |
| 222 | const struct net_device *out, |
| 223 | int (*okfn)(struct sk_buff *)) |
| 224 | { |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 225 | struct sk_buff *reasm = skb->nfct_reasm; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 226 | |
| 227 | /* This packet is fragmented and has reassembled packet. */ |
| 228 | if (reasm) { |
| 229 | /* Reassembled packet isn't parsed yet ? */ |
| 230 | if (!reasm->nfct) { |
| 231 | unsigned int ret; |
| 232 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 233 | ret = nf_conntrack_in(PF_INET6, hooknum, reasm); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 234 | if (ret != NF_ACCEPT) |
| 235 | return ret; |
| 236 | } |
| 237 | nf_conntrack_get(reasm->nfct); |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 238 | skb->nfct = reasm->nfct; |
| 239 | skb->nfctinfo = reasm->nfctinfo; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 240 | return NF_ACCEPT; |
| 241 | } |
| 242 | |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 243 | return nf_conntrack_in(PF_INET6, hooknum, skb); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | static unsigned int ipv6_conntrack_local(unsigned int hooknum, |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 247 | struct sk_buff *skb, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 248 | const struct net_device *in, |
| 249 | const struct net_device *out, |
| 250 | int (*okfn)(struct sk_buff *)) |
| 251 | { |
| 252 | /* root is playing with raw sockets. */ |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 253 | if (skb->len < sizeof(struct ipv6hdr)) { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 254 | if (net_ratelimit()) |
| 255 | printk("ipv6_conntrack_local: packet too short\n"); |
| 256 | return NF_ACCEPT; |
| 257 | } |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 258 | return ipv6_conntrack_in(hooknum, skb, in, out, okfn); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 259 | } |
| 260 | |
Patrick McHardy | 964ddaa | 2006-04-06 14:09:49 -0700 | [diff] [blame] | 261 | static struct nf_hook_ops ipv6_conntrack_ops[] = { |
| 262 | { |
| 263 | .hook = ipv6_defrag, |
| 264 | .owner = THIS_MODULE, |
| 265 | .pf = PF_INET6, |
| 266 | .hooknum = NF_IP6_PRE_ROUTING, |
| 267 | .priority = NF_IP6_PRI_CONNTRACK_DEFRAG, |
| 268 | }, |
| 269 | { |
| 270 | .hook = ipv6_conntrack_in, |
| 271 | .owner = THIS_MODULE, |
| 272 | .pf = PF_INET6, |
| 273 | .hooknum = NF_IP6_PRE_ROUTING, |
| 274 | .priority = NF_IP6_PRI_CONNTRACK, |
| 275 | }, |
| 276 | { |
| 277 | .hook = ipv6_conntrack_local, |
| 278 | .owner = THIS_MODULE, |
| 279 | .pf = PF_INET6, |
| 280 | .hooknum = NF_IP6_LOCAL_OUT, |
| 281 | .priority = NF_IP6_PRI_CONNTRACK, |
| 282 | }, |
| 283 | { |
| 284 | .hook = ipv6_defrag, |
| 285 | .owner = THIS_MODULE, |
| 286 | .pf = PF_INET6, |
| 287 | .hooknum = NF_IP6_LOCAL_OUT, |
| 288 | .priority = NF_IP6_PRI_CONNTRACK_DEFRAG, |
| 289 | }, |
| 290 | { |
| 291 | .hook = ipv6_confirm, |
| 292 | .owner = THIS_MODULE, |
| 293 | .pf = PF_INET6, |
| 294 | .hooknum = NF_IP6_POST_ROUTING, |
| 295 | .priority = NF_IP6_PRI_LAST, |
| 296 | }, |
| 297 | { |
| 298 | .hook = ipv6_confirm, |
| 299 | .owner = THIS_MODULE, |
| 300 | .pf = PF_INET6, |
| 301 | .hooknum = NF_IP6_LOCAL_IN, |
| 302 | .priority = NF_IP6_PRI_LAST-1, |
| 303 | }, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 304 | }; |
| 305 | |
| 306 | #ifdef CONFIG_SYSCTL |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 307 | static ctl_table nf_ct_ipv6_sysctl_table[] = { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 308 | { |
| 309 | .ctl_name = NET_NF_CONNTRACK_FRAG6_TIMEOUT, |
| 310 | .procname = "nf_conntrack_frag6_timeout", |
Pavel Emelyanov | 04128f2 | 2007-10-15 02:33:45 -0700 | [diff] [blame^] | 311 | .data = &nf_frags_ctl.timeout, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 312 | .maxlen = sizeof(unsigned int), |
| 313 | .mode = 0644, |
| 314 | .proc_handler = &proc_dointvec_jiffies, |
| 315 | }, |
| 316 | { |
| 317 | .ctl_name = NET_NF_CONNTRACK_FRAG6_LOW_THRESH, |
| 318 | .procname = "nf_conntrack_frag6_low_thresh", |
Pavel Emelyanov | 04128f2 | 2007-10-15 02:33:45 -0700 | [diff] [blame^] | 319 | .data = &nf_frags_ctl.low_thresh, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 320 | .maxlen = sizeof(unsigned int), |
| 321 | .mode = 0644, |
Yasuyuki Kozakai | 7686a02 | 2005-11-14 15:27:43 -0800 | [diff] [blame] | 322 | .proc_handler = &proc_dointvec, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 323 | }, |
| 324 | { |
| 325 | .ctl_name = NET_NF_CONNTRACK_FRAG6_HIGH_THRESH, |
| 326 | .procname = "nf_conntrack_frag6_high_thresh", |
Pavel Emelyanov | 04128f2 | 2007-10-15 02:33:45 -0700 | [diff] [blame^] | 327 | .data = &nf_frags_ctl.high_thresh, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 328 | .maxlen = sizeof(unsigned int), |
| 329 | .mode = 0644, |
Yasuyuki Kozakai | 7686a02 | 2005-11-14 15:27:43 -0800 | [diff] [blame] | 330 | .proc_handler = &proc_dointvec, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 331 | }, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 332 | { .ctl_name = 0 } |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 333 | }; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 334 | #endif |
| 335 | |
Patrick McHardy | e281db5c | 2007-03-04 15:57:25 -0800 | [diff] [blame] | 336 | #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 337 | |
| 338 | #include <linux/netfilter/nfnetlink.h> |
| 339 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 340 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 341 | static int ipv6_tuple_to_nlattr(struct sk_buff *skb, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 342 | const struct nf_conntrack_tuple *tuple) |
| 343 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 344 | NLA_PUT(skb, CTA_IP_V6_SRC, sizeof(u_int32_t) * 4, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 345 | &tuple->src.u3.ip6); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 346 | NLA_PUT(skb, CTA_IP_V6_DST, sizeof(u_int32_t) * 4, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 347 | &tuple->dst.u3.ip6); |
| 348 | return 0; |
| 349 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 350 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 351 | return -1; |
| 352 | } |
| 353 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 354 | static const struct nla_policy ipv6_nla_policy[CTA_IP_MAX+1] = { |
| 355 | [CTA_IP_V6_SRC] = { .len = sizeof(u_int32_t)*4 }, |
| 356 | [CTA_IP_V6_DST] = { .len = sizeof(u_int32_t)*4 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 357 | }; |
| 358 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 359 | static int ipv6_nlattr_to_tuple(struct nlattr *tb[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 360 | struct nf_conntrack_tuple *t) |
| 361 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 362 | if (!tb[CTA_IP_V6_SRC] || !tb[CTA_IP_V6_DST]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 363 | return -EINVAL; |
| 364 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 365 | memcpy(&t->src.u3.ip6, nla_data(tb[CTA_IP_V6_SRC]), |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 366 | sizeof(u_int32_t) * 4); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 367 | memcpy(&t->dst.u3.ip6, nla_data(tb[CTA_IP_V6_DST]), |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 368 | sizeof(u_int32_t) * 4); |
| 369 | |
| 370 | return 0; |
| 371 | } |
| 372 | #endif |
| 373 | |
Patrick McHardy | 61075af | 2007-07-14 20:48:19 -0700 | [diff] [blame] | 374 | struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 __read_mostly = { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 375 | .l3proto = PF_INET6, |
| 376 | .name = "ipv6", |
| 377 | .pkt_to_tuple = ipv6_pkt_to_tuple, |
| 378 | .invert_tuple = ipv6_invert_tuple, |
| 379 | .print_tuple = ipv6_print_tuple, |
| 380 | .print_conntrack = ipv6_print_conntrack, |
Yasuyuki Kozakai | ffc3069 | 2007-07-14 20:44:50 -0700 | [diff] [blame] | 381 | .get_l4proto = ipv6_get_l4proto, |
Patrick McHardy | e281db5c | 2007-03-04 15:57:25 -0800 | [diff] [blame] | 382 | #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 383 | .tuple_to_nlattr = ipv6_tuple_to_nlattr, |
| 384 | .nlattr_to_tuple = ipv6_nlattr_to_tuple, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 385 | .nla_policy = ipv6_nla_policy, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 386 | #endif |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 387 | #ifdef CONFIG_SYSCTL |
| 388 | .ctl_table_path = nf_net_netfilter_sysctl_path, |
| 389 | .ctl_table = nf_ct_ipv6_sysctl_table, |
| 390 | #endif |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 391 | .me = THIS_MODULE, |
| 392 | }; |
| 393 | |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 394 | MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6)); |
| 395 | MODULE_LICENSE("GPL"); |
| 396 | MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>"); |
| 397 | |
| 398 | static int __init nf_conntrack_l3proto_ipv6_init(void) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 399 | { |
| 400 | int ret = 0; |
| 401 | |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 402 | need_conntrack(); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 403 | |
| 404 | ret = nf_ct_frag6_init(); |
| 405 | if (ret < 0) { |
| 406 | printk("nf_conntrack_ipv6: can't initialize frag6.\n"); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 407 | return ret; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 408 | } |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 409 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_tcp6); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 410 | if (ret < 0) { |
| 411 | printk("nf_conntrack_ipv6: can't register tcp.\n"); |
| 412 | goto cleanup_frag6; |
| 413 | } |
| 414 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 415 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udp6); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 416 | if (ret < 0) { |
| 417 | printk("nf_conntrack_ipv6: can't register udp.\n"); |
| 418 | goto cleanup_tcp; |
| 419 | } |
| 420 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 421 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_icmpv6); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 422 | if (ret < 0) { |
| 423 | printk("nf_conntrack_ipv6: can't register icmpv6.\n"); |
| 424 | goto cleanup_udp; |
| 425 | } |
| 426 | |
| 427 | ret = nf_conntrack_l3proto_register(&nf_conntrack_l3proto_ipv6); |
| 428 | if (ret < 0) { |
| 429 | printk("nf_conntrack_ipv6: can't register ipv6\n"); |
| 430 | goto cleanup_icmpv6; |
| 431 | } |
| 432 | |
Patrick McHardy | 964ddaa | 2006-04-06 14:09:49 -0700 | [diff] [blame] | 433 | ret = nf_register_hooks(ipv6_conntrack_ops, |
| 434 | ARRAY_SIZE(ipv6_conntrack_ops)); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 435 | if (ret < 0) { |
| 436 | printk("nf_conntrack_ipv6: can't register pre-routing defrag " |
| 437 | "hook.\n"); |
| 438 | goto cleanup_ipv6; |
| 439 | } |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 440 | return ret; |
| 441 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 442 | cleanup_ipv6: |
| 443 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6); |
| 444 | cleanup_icmpv6: |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 445 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmpv6); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 446 | cleanup_udp: |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 447 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp6); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 448 | cleanup_tcp: |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 449 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp6); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 450 | cleanup_frag6: |
| 451 | nf_ct_frag6_cleanup(); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 452 | return ret; |
| 453 | } |
| 454 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 455 | static void __exit nf_conntrack_l3proto_ipv6_fini(void) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 456 | { |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 457 | synchronize_net(); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 458 | nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); |
| 459 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6); |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 460 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmpv6); |
| 461 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp6); |
| 462 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp6); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 463 | nf_ct_frag6_cleanup(); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 464 | } |
| 465 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 466 | module_init(nf_conntrack_l3proto_ipv6_init); |
| 467 | module_exit(nf_conntrack_l3proto_ipv6_fini); |