Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IP6 tables REJECT target module |
| 3 | * Linux INET6 implementation |
| 4 | * |
| 5 | * Copyright (C)2003 USAGI/WIDE Project |
| 6 | * |
| 7 | * Authors: |
| 8 | * Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> |
| 9 | * |
| 10 | * Based on net/ipv4/netfilter/ipt_REJECT.c |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * as published by the Free Software Foundation; either version |
| 15 | * 2 of the License, or (at your option) any later version. |
| 16 | */ |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 18 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/gfp.h> |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 20 | #include <linux/module.h> |
| 21 | #include <linux/skbuff.h> |
| 22 | #include <linux/icmpv6.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <net/ipv6.h> |
| 25 | #include <net/tcp.h> |
| 26 | #include <net/icmp.h> |
| 27 | #include <net/ip6_checksum.h> |
| 28 | #include <net/ip6_fib.h> |
| 29 | #include <net/ip6_route.h> |
| 30 | #include <net/flow.h> |
Jan Engelhardt | 6709dbb | 2007-02-07 15:11:19 -0800 | [diff] [blame] | 31 | #include <linux/netfilter/x_tables.h> |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 32 | #include <linux/netfilter_ipv6/ip6_tables.h> |
| 33 | #include <linux/netfilter_ipv6/ip6t_REJECT.h> |
| 34 | |
| 35 | MODULE_AUTHOR("Yasuyuki KOZAKAI <yasuyuki.kozakai@toshiba.co.jp>"); |
Jan Engelhardt | 2ae15b6 | 2008-01-14 23:42:28 -0800 | [diff] [blame] | 36 | MODULE_DESCRIPTION("Xtables: packet \"rejection\" target for IPv6"); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 37 | MODULE_LICENSE("GPL"); |
| 38 | |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 39 | /* Send RST reply */ |
Alexey Dobriyan | e10aad9 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 40 | static void send_reset(struct net *net, struct sk_buff *oldskb) |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 41 | { |
| 42 | struct sk_buff *nskb; |
| 43 | struct tcphdr otcph, *tcph; |
| 44 | unsigned int otcplen, hh_len; |
| 45 | int tcphoff, needs_ack; |
Jan Engelhardt | 3cf93c9 | 2008-04-14 09:56:05 +0200 | [diff] [blame] | 46 | const struct ipv6hdr *oip6h = ipv6_hdr(oldskb); |
| 47 | struct ipv6hdr *ip6h; |
Fernando Luis Vazquez Cao | 4319cc0 | 2011-05-10 09:55:44 +0200 | [diff] [blame] | 48 | #define DEFAULT_TOS_VALUE 0x0U |
| 49 | const __u8 tclass = DEFAULT_TOS_VALUE; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 50 | struct dst_entry *dst = NULL; |
| 51 | u8 proto; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 52 | struct flowi6 fl6; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 53 | |
| 54 | if ((!(ipv6_addr_type(&oip6h->saddr) & IPV6_ADDR_UNICAST)) || |
| 55 | (!(ipv6_addr_type(&oip6h->daddr) & IPV6_ADDR_UNICAST))) { |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 56 | pr_debug("addr is not unicast.\n"); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 57 | return; |
| 58 | } |
| 59 | |
| 60 | proto = oip6h->nexthdr; |
| 61 | tcphoff = ipv6_skip_exthdr(oldskb, ((u8*)(oip6h+1) - oldskb->data), &proto); |
| 62 | |
| 63 | if ((tcphoff < 0) || (tcphoff > oldskb->len)) { |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 64 | pr_debug("Cannot get TCP header.\n"); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 65 | return; |
| 66 | } |
| 67 | |
| 68 | otcplen = oldskb->len - tcphoff; |
| 69 | |
| 70 | /* IP header checks: fragment, too short. */ |
Jan Engelhardt | 7c4e36b | 2007-07-07 22:19:08 -0700 | [diff] [blame] | 71 | if (proto != IPPROTO_TCP || otcplen < sizeof(struct tcphdr)) { |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 72 | pr_debug("proto(%d) != IPPROTO_TCP, " |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 73 | "or too short. otcplen = %d\n", |
| 74 | proto, otcplen); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 75 | return; |
| 76 | } |
| 77 | |
| 78 | if (skb_copy_bits(oldskb, tcphoff, &otcph, sizeof(struct tcphdr))) |
| 79 | BUG(); |
| 80 | |
| 81 | /* No RST for RST. */ |
| 82 | if (otcph.rst) { |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 83 | pr_debug("RST is set\n"); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 84 | return; |
| 85 | } |
| 86 | |
| 87 | /* Check checksum. */ |
| 88 | if (csum_ipv6_magic(&oip6h->saddr, &oip6h->daddr, otcplen, IPPROTO_TCP, |
| 89 | skb_checksum(oldskb, tcphoff, otcplen, 0))) { |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 90 | pr_debug("TCP checksum is invalid\n"); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 91 | return; |
| 92 | } |
| 93 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 94 | memset(&fl6, 0, sizeof(fl6)); |
| 95 | fl6.flowi6_proto = IPPROTO_TCP; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame^] | 96 | fl6.saddr = oip6h->daddr; |
| 97 | fl6.daddr = oip6h->saddr; |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 98 | fl6.fl6_sport = otcph.dest; |
| 99 | fl6.fl6_dport = otcph.source; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 100 | security_skb_classify_flow(oldskb, flowi6_to_flowi(&fl6)); |
| 101 | dst = ip6_route_output(net, NULL, &fl6); |
Eric Dumazet | 499031a | 2010-07-02 10:05:01 +0200 | [diff] [blame] | 102 | if (dst == NULL || dst->error) { |
| 103 | dst_release(dst); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 104 | return; |
Eric Dumazet | 499031a | 2010-07-02 10:05:01 +0200 | [diff] [blame] | 105 | } |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 106 | dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0); |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 107 | if (IS_ERR(dst)) |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 108 | return; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 109 | |
| 110 | hh_len = (dst->dev->hard_header_len + 15)&~15; |
| 111 | nskb = alloc_skb(hh_len + 15 + dst->header_len + sizeof(struct ipv6hdr) |
| 112 | + sizeof(struct tcphdr) + dst->trailer_len, |
| 113 | GFP_ATOMIC); |
| 114 | |
| 115 | if (!nskb) { |
| 116 | if (net_ratelimit()) |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 117 | pr_debug("cannot alloc skb\n"); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 118 | dst_release(dst); |
| 119 | return; |
| 120 | } |
| 121 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 122 | skb_dst_set(nskb, dst); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 123 | |
| 124 | skb_reserve(nskb, hh_len + dst->header_len); |
| 125 | |
Arnaldo Carvalho de Melo | 1ced98e | 2007-03-10 19:57:15 -0300 | [diff] [blame] | 126 | skb_put(nskb, sizeof(struct ipv6hdr)); |
| 127 | skb_reset_network_header(nskb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 128 | ip6h = ipv6_hdr(nskb); |
Fernando Luis Vazquez Cao | 4319cc0 | 2011-05-10 09:55:44 +0200 | [diff] [blame] | 129 | *(__be32 *)ip6h = htonl(0x60000000 | (tclass << 20)); |
David S. Miller | abbf46a | 2010-12-12 21:14:46 -0800 | [diff] [blame] | 130 | ip6h->hop_limit = ip6_dst_hoplimit(dst); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 131 | ip6h->nexthdr = IPPROTO_TCP; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame^] | 132 | ip6h->saddr = oip6h->daddr; |
| 133 | ip6h->daddr = oip6h->saddr; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 134 | |
| 135 | tcph = (struct tcphdr *)skb_put(nskb, sizeof(struct tcphdr)); |
| 136 | /* Truncate to length (no data) */ |
| 137 | tcph->doff = sizeof(struct tcphdr)/4; |
| 138 | tcph->source = otcph.dest; |
| 139 | tcph->dest = otcph.source; |
| 140 | |
| 141 | if (otcph.ack) { |
| 142 | needs_ack = 0; |
| 143 | tcph->seq = otcph.ack_seq; |
| 144 | tcph->ack_seq = 0; |
| 145 | } else { |
| 146 | needs_ack = 1; |
| 147 | tcph->ack_seq = htonl(ntohl(otcph.seq) + otcph.syn + otcph.fin |
| 148 | + otcplen - (otcph.doff<<2)); |
| 149 | tcph->seq = 0; |
| 150 | } |
| 151 | |
| 152 | /* Reset flags */ |
| 153 | ((u_int8_t *)tcph)[13] = 0; |
| 154 | tcph->rst = 1; |
| 155 | tcph->ack = needs_ack; |
| 156 | tcph->window = 0; |
| 157 | tcph->urg_ptr = 0; |
| 158 | tcph->check = 0; |
| 159 | |
| 160 | /* Adjust TCP checksum */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 161 | tcph->check = csum_ipv6_magic(&ipv6_hdr(nskb)->saddr, |
| 162 | &ipv6_hdr(nskb)->daddr, |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 163 | sizeof(struct tcphdr), IPPROTO_TCP, |
Jan Engelhardt | a47362a | 2007-07-07 22:16:55 -0700 | [diff] [blame] | 164 | csum_partial(tcph, |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 165 | sizeof(struct tcphdr), 0)); |
| 166 | |
Yasuyuki Kozakai | 08857fa | 2006-02-15 15:23:28 -0800 | [diff] [blame] | 167 | nf_ct_attach(nskb, oldskb); |
| 168 | |
Herbert Xu | ef76bc2 | 2008-01-11 19:15:08 -0800 | [diff] [blame] | 169 | ip6_local_out(nskb); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | static inline void |
Alexey Dobriyan | e10aad9 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 173 | send_unreach(struct net *net, struct sk_buff *skb_in, unsigned char code, |
| 174 | unsigned int hooknum) |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 175 | { |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 176 | if (hooknum == NF_INET_LOCAL_OUT && skb_in->dev == NULL) |
Alexey Dobriyan | e10aad9 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 177 | skb_in->dev = net->loopback_dev; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 178 | |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 179 | icmpv6_send(skb_in, ICMPV6_DEST_UNREACH, code, 0); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 182 | static unsigned int |
Jan Engelhardt | 4b560b4 | 2009-07-05 19:43:26 +0200 | [diff] [blame] | 183 | reject_tg6(struct sk_buff *skb, const struct xt_action_param *par) |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 184 | { |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 185 | const struct ip6t_reject_info *reject = par->targinfo; |
| 186 | struct net *net = dev_net((par->in != NULL) ? par->in : par->out); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 187 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 188 | pr_debug("%s: medium point\n", __func__); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 189 | switch (reject->with) { |
| 190 | case IP6T_ICMP6_NO_ROUTE: |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 191 | send_unreach(net, skb, ICMPV6_NOROUTE, par->hooknum); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 192 | break; |
| 193 | case IP6T_ICMP6_ADM_PROHIBITED: |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 194 | send_unreach(net, skb, ICMPV6_ADM_PROHIBITED, par->hooknum); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 195 | break; |
| 196 | case IP6T_ICMP6_NOT_NEIGHBOUR: |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 197 | send_unreach(net, skb, ICMPV6_NOT_NEIGHBOUR, par->hooknum); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 198 | break; |
| 199 | case IP6T_ICMP6_ADDR_UNREACH: |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 200 | send_unreach(net, skb, ICMPV6_ADDR_UNREACH, par->hooknum); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 201 | break; |
| 202 | case IP6T_ICMP6_PORT_UNREACH: |
Jan Engelhardt | 7eb3558 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 203 | send_unreach(net, skb, ICMPV6_PORT_UNREACH, par->hooknum); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 204 | break; |
| 205 | case IP6T_ICMP6_ECHOREPLY: |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 206 | /* Do nothing */ |
| 207 | break; |
| 208 | case IP6T_TCP_RESET: |
Alexey Dobriyan | e10aad9 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 209 | send_reset(net, skb); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 210 | break; |
| 211 | default: |
| 212 | if (net_ratelimit()) |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 213 | pr_info("case %u not handled yet\n", reject->with); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 214 | break; |
| 215 | } |
| 216 | |
| 217 | return NF_DROP; |
| 218 | } |
| 219 | |
Jan Engelhardt | 135367b | 2010-03-19 17:16:42 +0100 | [diff] [blame] | 220 | static int reject_tg6_check(const struct xt_tgchk_param *par) |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 221 | { |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 222 | const struct ip6t_reject_info *rejinfo = par->targinfo; |
| 223 | const struct ip6t_entry *e = par->entryinfo; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 224 | |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 225 | if (rejinfo->with == IP6T_ICMP6_ECHOREPLY) { |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 226 | pr_info("ECHOREPLY is not supported.\n"); |
Jan Engelhardt | d6b00a5 | 2010-03-25 16:34:45 +0100 | [diff] [blame] | 227 | return -EINVAL; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 228 | } else if (rejinfo->with == IP6T_TCP_RESET) { |
| 229 | /* Must specify that it's a TCP packet */ |
Joe Perches | 3666ed1 | 2009-11-23 23:17:06 +0100 | [diff] [blame] | 230 | if (e->ipv6.proto != IPPROTO_TCP || |
| 231 | (e->ipv6.invflags & XT_INV_PROTO)) { |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 232 | pr_info("TCP_RESET illegal for non-tcp\n"); |
Jan Engelhardt | d6b00a5 | 2010-03-25 16:34:45 +0100 | [diff] [blame] | 233 | return -EINVAL; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 234 | } |
| 235 | } |
Jan Engelhardt | d6b00a5 | 2010-03-25 16:34:45 +0100 | [diff] [blame] | 236 | return 0; |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 237 | } |
| 238 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 239 | static struct xt_target reject_tg6_reg __read_mostly = { |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 240 | .name = "REJECT", |
Jan Engelhardt | ee999d8 | 2008-10-08 11:35:01 +0200 | [diff] [blame] | 241 | .family = NFPROTO_IPV6, |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 242 | .target = reject_tg6, |
Patrick McHardy | 7f93971 | 2006-03-20 18:01:43 -0800 | [diff] [blame] | 243 | .targetsize = sizeof(struct ip6t_reject_info), |
| 244 | .table = "filter", |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 245 | .hooks = (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD) | |
| 246 | (1 << NF_INET_LOCAL_OUT), |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 247 | .checkentry = reject_tg6_check, |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 248 | .me = THIS_MODULE |
| 249 | }; |
| 250 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 251 | static int __init reject_tg6_init(void) |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 252 | { |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 253 | return xt_register_target(&reject_tg6_reg); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 256 | static void __exit reject_tg6_exit(void) |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 257 | { |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 258 | xt_unregister_target(&reject_tg6_reg); |
Patrick McHardy | 764d8a9 | 2005-08-21 23:31:06 -0700 | [diff] [blame] | 259 | } |
| 260 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 261 | module_init(reject_tg6_init); |
| 262 | module_exit(reject_tg6_exit); |