Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This is a module which is used for logging packets. |
| 3 | */ |
| 4 | |
| 5 | /* (C) 2001 Jan Rekorajski <baggins@pld.org.pl> |
| 6 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/moduleparam.h> |
| 15 | #include <linux/skbuff.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 16 | #include <linux/if_arp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/ip.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | #include <linux/icmpv6.h> |
| 20 | #include <net/udp.h> |
| 21 | #include <net/tcp.h> |
| 22 | #include <net/ipv6.h> |
| 23 | #include <linux/netfilter.h> |
| 24 | #include <linux/netfilter_ipv6/ip6_tables.h> |
| 25 | |
| 26 | MODULE_AUTHOR("Jan Rekorajski <baggins@pld.org.pl>"); |
| 27 | MODULE_DESCRIPTION("IP6 tables LOG target module"); |
| 28 | MODULE_LICENSE("GPL"); |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | struct in_device; |
| 31 | #include <net/route.h> |
| 32 | #include <linux/netfilter_ipv6/ip6t_LOG.h> |
| 33 | |
| 34 | #if 0 |
| 35 | #define DEBUGP printk |
| 36 | #else |
| 37 | #define DEBUGP(format, args...) |
| 38 | #endif |
| 39 | |
| 40 | /* Use lock to serialize, so printks don't overlap */ |
| 41 | static DEFINE_SPINLOCK(log_lock); |
| 42 | |
| 43 | /* One level of recursion won't kill us */ |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 44 | static void dump_packet(const struct nf_loginfo *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | const struct sk_buff *skb, unsigned int ip6hoff, |
| 46 | int recurse) |
| 47 | { |
| 48 | u_int8_t currenthdr; |
| 49 | int fragment; |
| 50 | struct ipv6hdr _ip6h, *ih; |
| 51 | unsigned int ptr; |
| 52 | unsigned int hdrlen = 0; |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 53 | unsigned int logflags; |
| 54 | |
| 55 | if (info->type == NF_LOG_TYPE_LOG) |
| 56 | logflags = info->u.log.logflags; |
| 57 | else |
| 58 | logflags = NF_LOG_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h); |
| 61 | if (ih == NULL) { |
| 62 | printk("TRUNCATED"); |
| 63 | return; |
| 64 | } |
| 65 | |
Joe Perches | 46b86a2 | 2006-01-13 14:29:07 -0800 | [diff] [blame] | 66 | /* Max length: 88 "SRC=0000.0000.0000.0000.0000.0000.0000.0000 DST=0000.0000.0000.0000.0000.0000.0000.0000 " */ |
| 67 | printk("SRC=" NIP6_FMT " DST=" NIP6_FMT " ", NIP6(ih->saddr), NIP6(ih->daddr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | /* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */ |
| 70 | printk("LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ", |
| 71 | ntohs(ih->payload_len) + sizeof(struct ipv6hdr), |
| 72 | (ntohl(*(u_int32_t *)ih) & 0x0ff00000) >> 20, |
| 73 | ih->hop_limit, |
| 74 | (ntohl(*(u_int32_t *)ih) & 0x000fffff)); |
| 75 | |
| 76 | fragment = 0; |
| 77 | ptr = ip6hoff + sizeof(struct ipv6hdr); |
| 78 | currenthdr = ih->nexthdr; |
| 79 | while (currenthdr != NEXTHDR_NONE && ip6t_ext_hdr(currenthdr)) { |
| 80 | struct ipv6_opt_hdr _hdr, *hp; |
| 81 | |
| 82 | hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr); |
| 83 | if (hp == NULL) { |
| 84 | printk("TRUNCATED"); |
| 85 | return; |
| 86 | } |
| 87 | |
| 88 | /* Max length: 48 "OPT (...) " */ |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 89 | if (logflags & IP6T_LOG_IPOPT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | printk("OPT ( "); |
| 91 | |
| 92 | switch (currenthdr) { |
| 93 | case IPPROTO_FRAGMENT: { |
| 94 | struct frag_hdr _fhdr, *fh; |
| 95 | |
| 96 | printk("FRAG:"); |
| 97 | fh = skb_header_pointer(skb, ptr, sizeof(_fhdr), |
| 98 | &_fhdr); |
| 99 | if (fh == NULL) { |
| 100 | printk("TRUNCATED "); |
| 101 | return; |
| 102 | } |
| 103 | |
| 104 | /* Max length: 6 "65535 " */ |
| 105 | printk("%u ", ntohs(fh->frag_off) & 0xFFF8); |
| 106 | |
| 107 | /* Max length: 11 "INCOMPLETE " */ |
| 108 | if (fh->frag_off & htons(0x0001)) |
| 109 | printk("INCOMPLETE "); |
| 110 | |
| 111 | printk("ID:%08x ", ntohl(fh->identification)); |
| 112 | |
| 113 | if (ntohs(fh->frag_off) & 0xFFF8) |
| 114 | fragment = 1; |
| 115 | |
| 116 | hdrlen = 8; |
| 117 | |
| 118 | break; |
| 119 | } |
| 120 | case IPPROTO_DSTOPTS: |
| 121 | case IPPROTO_ROUTING: |
| 122 | case IPPROTO_HOPOPTS: |
| 123 | if (fragment) { |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 124 | if (logflags & IP6T_LOG_IPOPT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | printk(")"); |
| 126 | return; |
| 127 | } |
| 128 | hdrlen = ipv6_optlen(hp); |
| 129 | break; |
| 130 | /* Max Length */ |
| 131 | case IPPROTO_AH: |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 132 | if (logflags & IP6T_LOG_IPOPT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | struct ip_auth_hdr _ahdr, *ah; |
| 134 | |
| 135 | /* Max length: 3 "AH " */ |
| 136 | printk("AH "); |
| 137 | |
| 138 | if (fragment) { |
| 139 | printk(")"); |
| 140 | return; |
| 141 | } |
| 142 | |
| 143 | ah = skb_header_pointer(skb, ptr, sizeof(_ahdr), |
| 144 | &_ahdr); |
| 145 | if (ah == NULL) { |
| 146 | /* |
| 147 | * Max length: 26 "INCOMPLETE [65535 |
| 148 | * bytes] )" |
| 149 | */ |
| 150 | printk("INCOMPLETE [%u bytes] )", |
| 151 | skb->len - ptr); |
| 152 | return; |
| 153 | } |
| 154 | |
| 155 | /* Length: 15 "SPI=0xF1234567 */ |
| 156 | printk("SPI=0x%x ", ntohl(ah->spi)); |
| 157 | |
| 158 | } |
| 159 | |
| 160 | hdrlen = (hp->hdrlen+2)<<2; |
| 161 | break; |
| 162 | case IPPROTO_ESP: |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 163 | if (logflags & IP6T_LOG_IPOPT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | struct ip_esp_hdr _esph, *eh; |
| 165 | |
| 166 | /* Max length: 4 "ESP " */ |
| 167 | printk("ESP "); |
| 168 | |
| 169 | if (fragment) { |
| 170 | printk(")"); |
| 171 | return; |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * Max length: 26 "INCOMPLETE [65535 bytes] )" |
| 176 | */ |
| 177 | eh = skb_header_pointer(skb, ptr, sizeof(_esph), |
| 178 | &_esph); |
| 179 | if (eh == NULL) { |
| 180 | printk("INCOMPLETE [%u bytes] )", |
| 181 | skb->len - ptr); |
| 182 | return; |
| 183 | } |
| 184 | |
| 185 | /* Length: 16 "SPI=0xF1234567 )" */ |
| 186 | printk("SPI=0x%x )", ntohl(eh->spi) ); |
| 187 | |
| 188 | } |
| 189 | return; |
| 190 | default: |
| 191 | /* Max length: 20 "Unknown Ext Hdr 255" */ |
| 192 | printk("Unknown Ext Hdr %u", currenthdr); |
| 193 | return; |
| 194 | } |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 195 | if (logflags & IP6T_LOG_IPOPT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | printk(") "); |
| 197 | |
| 198 | currenthdr = hp->nexthdr; |
| 199 | ptr += hdrlen; |
| 200 | } |
| 201 | |
| 202 | switch (currenthdr) { |
| 203 | case IPPROTO_TCP: { |
| 204 | struct tcphdr _tcph, *th; |
| 205 | |
| 206 | /* Max length: 10 "PROTO=TCP " */ |
| 207 | printk("PROTO=TCP "); |
| 208 | |
| 209 | if (fragment) |
| 210 | break; |
| 211 | |
| 212 | /* Max length: 25 "INCOMPLETE [65535 bytes] " */ |
| 213 | th = skb_header_pointer(skb, ptr, sizeof(_tcph), &_tcph); |
| 214 | if (th == NULL) { |
| 215 | printk("INCOMPLETE [%u bytes] ", skb->len - ptr); |
| 216 | return; |
| 217 | } |
| 218 | |
| 219 | /* Max length: 20 "SPT=65535 DPT=65535 " */ |
| 220 | printk("SPT=%u DPT=%u ", |
| 221 | ntohs(th->source), ntohs(th->dest)); |
| 222 | /* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */ |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 223 | if (logflags & IP6T_LOG_TCPSEQ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | printk("SEQ=%u ACK=%u ", |
| 225 | ntohl(th->seq), ntohl(th->ack_seq)); |
| 226 | /* Max length: 13 "WINDOW=65535 " */ |
| 227 | printk("WINDOW=%u ", ntohs(th->window)); |
| 228 | /* Max length: 9 "RES=0x3C " */ |
| 229 | printk("RES=0x%02x ", (u_int8_t)(ntohl(tcp_flag_word(th) & TCP_RESERVED_BITS) >> 22)); |
| 230 | /* Max length: 32 "CWR ECE URG ACK PSH RST SYN FIN " */ |
| 231 | if (th->cwr) |
| 232 | printk("CWR "); |
| 233 | if (th->ece) |
| 234 | printk("ECE "); |
| 235 | if (th->urg) |
| 236 | printk("URG "); |
| 237 | if (th->ack) |
| 238 | printk("ACK "); |
| 239 | if (th->psh) |
| 240 | printk("PSH "); |
| 241 | if (th->rst) |
| 242 | printk("RST "); |
| 243 | if (th->syn) |
| 244 | printk("SYN "); |
| 245 | if (th->fin) |
| 246 | printk("FIN "); |
| 247 | /* Max length: 11 "URGP=65535 " */ |
| 248 | printk("URGP=%u ", ntohs(th->urg_ptr)); |
| 249 | |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 250 | if ((logflags & IP6T_LOG_TCPOPT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | && th->doff * 4 > sizeof(struct tcphdr)) { |
| 252 | u_int8_t _opt[60 - sizeof(struct tcphdr)], *op; |
| 253 | unsigned int i; |
| 254 | unsigned int optsize = th->doff * 4 |
| 255 | - sizeof(struct tcphdr); |
| 256 | |
| 257 | op = skb_header_pointer(skb, |
| 258 | ptr + sizeof(struct tcphdr), |
| 259 | optsize, _opt); |
| 260 | if (op == NULL) { |
| 261 | printk("OPT (TRUNCATED)"); |
| 262 | return; |
| 263 | } |
| 264 | |
| 265 | /* Max length: 127 "OPT (" 15*4*2chars ") " */ |
| 266 | printk("OPT ("); |
| 267 | for (i =0; i < optsize; i++) |
| 268 | printk("%02X", op[i]); |
| 269 | printk(") "); |
| 270 | } |
| 271 | break; |
| 272 | } |
| 273 | case IPPROTO_UDP: { |
| 274 | struct udphdr _udph, *uh; |
| 275 | |
| 276 | /* Max length: 10 "PROTO=UDP " */ |
| 277 | printk("PROTO=UDP "); |
| 278 | |
| 279 | if (fragment) |
| 280 | break; |
| 281 | |
| 282 | /* Max length: 25 "INCOMPLETE [65535 bytes] " */ |
| 283 | uh = skb_header_pointer(skb, ptr, sizeof(_udph), &_udph); |
| 284 | if (uh == NULL) { |
| 285 | printk("INCOMPLETE [%u bytes] ", skb->len - ptr); |
| 286 | return; |
| 287 | } |
| 288 | |
| 289 | /* Max length: 20 "SPT=65535 DPT=65535 " */ |
| 290 | printk("SPT=%u DPT=%u LEN=%u ", |
| 291 | ntohs(uh->source), ntohs(uh->dest), |
| 292 | ntohs(uh->len)); |
| 293 | break; |
| 294 | } |
| 295 | case IPPROTO_ICMPV6: { |
| 296 | struct icmp6hdr _icmp6h, *ic; |
| 297 | |
| 298 | /* Max length: 13 "PROTO=ICMPv6 " */ |
| 299 | printk("PROTO=ICMPv6 "); |
| 300 | |
| 301 | if (fragment) |
| 302 | break; |
| 303 | |
| 304 | /* Max length: 25 "INCOMPLETE [65535 bytes] " */ |
| 305 | ic = skb_header_pointer(skb, ptr, sizeof(_icmp6h), &_icmp6h); |
| 306 | if (ic == NULL) { |
| 307 | printk("INCOMPLETE [%u bytes] ", skb->len - ptr); |
| 308 | return; |
| 309 | } |
| 310 | |
| 311 | /* Max length: 18 "TYPE=255 CODE=255 " */ |
| 312 | printk("TYPE=%u CODE=%u ", ic->icmp6_type, ic->icmp6_code); |
| 313 | |
| 314 | switch (ic->icmp6_type) { |
| 315 | case ICMPV6_ECHO_REQUEST: |
| 316 | case ICMPV6_ECHO_REPLY: |
| 317 | /* Max length: 19 "ID=65535 SEQ=65535 " */ |
| 318 | printk("ID=%u SEQ=%u ", |
| 319 | ntohs(ic->icmp6_identifier), |
| 320 | ntohs(ic->icmp6_sequence)); |
| 321 | break; |
| 322 | case ICMPV6_MGM_QUERY: |
| 323 | case ICMPV6_MGM_REPORT: |
| 324 | case ICMPV6_MGM_REDUCTION: |
| 325 | break; |
| 326 | |
| 327 | case ICMPV6_PARAMPROB: |
| 328 | /* Max length: 17 "POINTER=ffffffff " */ |
| 329 | printk("POINTER=%08x ", ntohl(ic->icmp6_pointer)); |
| 330 | /* Fall through */ |
| 331 | case ICMPV6_DEST_UNREACH: |
| 332 | case ICMPV6_PKT_TOOBIG: |
| 333 | case ICMPV6_TIME_EXCEED: |
| 334 | /* Max length: 3+maxlen */ |
| 335 | if (recurse) { |
| 336 | printk("["); |
| 337 | dump_packet(info, skb, ptr + sizeof(_icmp6h), |
| 338 | 0); |
| 339 | printk("] "); |
| 340 | } |
| 341 | |
| 342 | /* Max length: 10 "MTU=65535 " */ |
| 343 | if (ic->icmp6_type == ICMPV6_PKT_TOOBIG) |
| 344 | printk("MTU=%u ", ntohl(ic->icmp6_mtu)); |
| 345 | } |
| 346 | break; |
| 347 | } |
| 348 | /* Max length: 10 "PROTO=255 " */ |
| 349 | default: |
| 350 | printk("PROTO=%u ", currenthdr); |
| 351 | } |
| 352 | |
| 353 | /* Max length: 15 "UID=4294967295 " */ |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 354 | if ((logflags & IP6T_LOG_UID) && recurse && skb->sk) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 356 | if (skb->sk->sk_socket && skb->sk->sk_socket->file) |
| 357 | printk("UID=%u ", skb->sk->sk_socket->file->f_uid); |
| 358 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 359 | } |
| 360 | } |
| 361 | |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 362 | static struct nf_loginfo default_loginfo = { |
| 363 | .type = NF_LOG_TYPE_LOG, |
| 364 | .u = { |
| 365 | .log = { |
| 366 | .level = 0, |
| 367 | .logflags = NF_LOG_MASK, |
| 368 | }, |
| 369 | }, |
| 370 | }; |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | static void |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 373 | ip6t_log_packet(unsigned int pf, |
| 374 | unsigned int hooknum, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | const struct sk_buff *skb, |
| 376 | const struct net_device *in, |
| 377 | const struct net_device *out, |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 378 | const struct nf_loginfo *loginfo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | const char *prefix) |
| 380 | { |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 381 | if (!loginfo) |
| 382 | loginfo = &default_loginfo; |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | spin_lock_bh(&log_lock); |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 385 | printk("<%d>%sIN=%s OUT=%s ", loginfo->u.log.level, |
| 386 | prefix, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | in ? in->name : "", |
| 388 | out ? out->name : ""); |
| 389 | if (in && !out) { |
Patrick McHardy | d3984a6 | 2005-07-22 12:52:47 -0700 | [diff] [blame] | 390 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | /* MAC logging for input chain only. */ |
| 392 | printk("MAC="); |
Patrick McHardy | d3984a6 | 2005-07-22 12:52:47 -0700 | [diff] [blame] | 393 | if (skb->dev && (len = skb->dev->hard_header_len) && |
Patrick McHardy | 047601b | 2005-06-21 14:07:13 -0700 | [diff] [blame] | 394 | skb->mac.raw != skb->nh.raw) { |
| 395 | unsigned char *p = skb->mac.raw; |
| 396 | int i; |
| 397 | |
| 398 | if (skb->dev->type == ARPHRD_SIT && |
| 399 | (p -= ETH_HLEN) < skb->head) |
| 400 | p = NULL; |
| 401 | |
Patrick McHardy | d3984a6 | 2005-07-22 12:52:47 -0700 | [diff] [blame] | 402 | if (p != NULL) { |
| 403 | for (i = 0; i < len; i++) |
| 404 | printk("%02x%s", p[i], |
| 405 | i == len - 1 ? "" : ":"); |
| 406 | } |
Patrick McHardy | 047601b | 2005-06-21 14:07:13 -0700 | [diff] [blame] | 407 | printk(" "); |
| 408 | |
| 409 | if (skb->dev->type == ARPHRD_SIT) { |
| 410 | struct iphdr *iph = (struct iphdr *)skb->mac.raw; |
| 411 | printk("TUNNEL=%u.%u.%u.%u->%u.%u.%u.%u ", |
| 412 | NIPQUAD(iph->saddr), |
| 413 | NIPQUAD(iph->daddr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | } else |
| 416 | printk(" "); |
| 417 | } |
| 418 | |
| 419 | dump_packet(loginfo, skb, (u8*)skb->nh.ipv6h - skb->data, 1); |
| 420 | printk("\n"); |
| 421 | spin_unlock_bh(&log_lock); |
| 422 | } |
| 423 | |
| 424 | static unsigned int |
| 425 | ip6t_log_target(struct sk_buff **pskb, |
| 426 | const struct net_device *in, |
| 427 | const struct net_device *out, |
| 428 | unsigned int hooknum, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 429 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | const void *targinfo, |
| 431 | void *userinfo) |
| 432 | { |
| 433 | const struct ip6t_log_info *loginfo = targinfo; |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 434 | struct nf_loginfo li; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 436 | li.type = NF_LOG_TYPE_LOG; |
| 437 | li.u.log.level = loginfo->level; |
| 438 | li.u.log.logflags = loginfo->logflags; |
| 439 | |
Patrick McHardy | bafac2a | 2006-02-27 13:04:17 -0800 | [diff] [blame] | 440 | if (loginfo->logflags & IP6T_LOG_NFLOG) |
| 441 | nf_log_packet(PF_INET6, hooknum, *pskb, in, out, &li, |
| 442 | loginfo->prefix); |
| 443 | else |
| 444 | ip6t_log_packet(PF_INET6, hooknum, *pskb, in, out, &li, |
| 445 | loginfo->prefix); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | return IP6T_CONTINUE; |
| 448 | } |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
| 451 | static int ip6t_log_checkentry(const char *tablename, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 452 | const void *entry, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 453 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | void *targinfo, |
| 455 | unsigned int targinfosize, |
| 456 | unsigned int hook_mask) |
| 457 | { |
| 458 | const struct ip6t_log_info *loginfo = targinfo; |
| 459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | if (loginfo->level >= 8) { |
| 461 | DEBUGP("LOG: level %u >= 8\n", loginfo->level); |
| 462 | return 0; |
| 463 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | if (loginfo->prefix[sizeof(loginfo->prefix)-1] != '\0') { |
| 465 | DEBUGP("LOG: prefix term %i\n", |
| 466 | loginfo->prefix[sizeof(loginfo->prefix)-1]); |
| 467 | return 0; |
| 468 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | return 1; |
| 470 | } |
| 471 | |
| 472 | static struct ip6t_target ip6t_log_reg = { |
| 473 | .name = "LOG", |
| 474 | .target = ip6t_log_target, |
Patrick McHardy | 7f93971 | 2006-03-20 18:01:43 -0800 | [diff] [blame] | 475 | .targetsize = sizeof(struct ip6t_log_info), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | .checkentry = ip6t_log_checkentry, |
| 477 | .me = THIS_MODULE, |
| 478 | }; |
| 479 | |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 480 | static struct nf_logger ip6t_logger = { |
| 481 | .name = "ip6t_LOG", |
| 482 | .logfn = &ip6t_log_packet, |
| 483 | .me = THIS_MODULE, |
| 484 | }; |
| 485 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 486 | static int __init ip6t_log_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | { |
| 488 | if (ip6t_register_target(&ip6t_log_reg)) |
| 489 | return -EINVAL; |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 490 | if (nf_log_register(PF_INET6, &ip6t_logger) < 0) { |
| 491 | printk(KERN_WARNING "ip6t_LOG: not logging via system console " |
| 492 | "since somebody else already registered for PF_INET6\n"); |
| 493 | /* we cannot make module load fail here, since otherwise |
| 494 | * ip6tables userspace would abort */ |
| 495 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
| 497 | return 0; |
| 498 | } |
| 499 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 500 | static void __exit ip6t_log_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
Harald Welte | 608c8e4 | 2005-08-09 19:58:27 -0700 | [diff] [blame] | 502 | nf_log_unregister_logger(&ip6t_logger); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | ip6t_unregister_target(&ip6t_log_reg); |
| 504 | } |
| 505 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 506 | module_init(ip6t_log_init); |
| 507 | module_exit(ip6t_log_fini); |