Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This is a module which is used for logging packets to userspace via |
| 3 | * nfetlink. |
| 4 | * |
| 5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> |
| 6 | * |
| 7 | * Based on the old ipv4-only ipt_ULOG.c: |
| 8 | * (C) 2000-2004 by Harald Welte <laforge@netfilter.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 13 | */ |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/skbuff.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/ip.h> |
| 18 | #include <linux/ipv6.h> |
| 19 | #include <linux/netdevice.h> |
| 20 | #include <linux/netfilter.h> |
| 21 | #include <linux/netlink.h> |
| 22 | #include <linux/netfilter/nfnetlink.h> |
| 23 | #include <linux/netfilter/nfnetlink_log.h> |
| 24 | #include <linux/spinlock.h> |
| 25 | #include <linux/sysctl.h> |
| 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/security.h> |
| 28 | #include <linux/list.h> |
| 29 | #include <linux/jhash.h> |
| 30 | #include <linux/random.h> |
| 31 | #include <net/sock.h> |
Patrick McHardy | f01ffbd | 2007-12-17 22:38:49 -0800 | [diff] [blame^] | 32 | #include <net/netfilter/nf_log.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 33 | |
| 34 | #include <asm/atomic.h> |
| 35 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 36 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 37 | #include "../bridge/br_private.h" |
| 38 | #endif |
| 39 | |
Holger Eitzenberger | c2db292 | 2006-02-04 02:13:14 -0800 | [diff] [blame] | 40 | #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 41 | #define NFULNL_TIMEOUT_DEFAULT HZ /* every second */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 42 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 43 | #define NFULNL_COPY_RANGE_MAX 0xFFFF /* max packet size is limited by 16-bit struct nfattr nfa_len field */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 44 | |
| 45 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ |
| 46 | printk(x, ## args); } while (0); |
| 47 | |
| 48 | #if 0 |
| 49 | #define UDEBUG(x, args ...) printk(KERN_DEBUG "%s(%d):%s(): " x, \ |
| 50 | __FILE__, __LINE__, __FUNCTION__, \ |
| 51 | ## args) |
| 52 | #else |
| 53 | #define UDEBUG(x, ...) |
| 54 | #endif |
| 55 | |
| 56 | struct nfulnl_instance { |
| 57 | struct hlist_node hlist; /* global list of instances */ |
| 58 | spinlock_t lock; |
| 59 | atomic_t use; /* use count */ |
| 60 | |
| 61 | unsigned int qlen; /* number of nlmsgs in skb */ |
| 62 | struct sk_buff *skb; /* pre-allocatd skb */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 63 | struct timer_list timer; |
| 64 | int peer_pid; /* PID of the peer process */ |
| 65 | |
| 66 | /* configurable parameters */ |
| 67 | unsigned int flushtimeout; /* timeout until queue flush */ |
| 68 | unsigned int nlbufsiz; /* netlink buffer allocation size */ |
| 69 | unsigned int qthreshold; /* threshold of the queue */ |
| 70 | u_int32_t copy_range; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 71 | u_int32_t seq; /* instance-local sequential counter */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 72 | u_int16_t group_num; /* number of this queue */ |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 73 | u_int16_t flags; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 74 | u_int8_t copy_mode; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 75 | }; |
| 76 | |
| 77 | static DEFINE_RWLOCK(instances_lock); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 78 | static atomic_t global_seq; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 79 | |
| 80 | #define INSTANCE_BUCKETS 16 |
| 81 | static struct hlist_head instance_table[INSTANCE_BUCKETS]; |
| 82 | static unsigned int hash_init; |
| 83 | |
| 84 | static inline u_int8_t instance_hashfn(u_int16_t group_num) |
| 85 | { |
| 86 | return ((group_num & 0xff) % INSTANCE_BUCKETS); |
| 87 | } |
| 88 | |
| 89 | static struct nfulnl_instance * |
| 90 | __instance_lookup(u_int16_t group_num) |
| 91 | { |
| 92 | struct hlist_head *head; |
| 93 | struct hlist_node *pos; |
| 94 | struct nfulnl_instance *inst; |
| 95 | |
| 96 | UDEBUG("entering (group_num=%u)\n", group_num); |
| 97 | |
| 98 | head = &instance_table[instance_hashfn(group_num)]; |
| 99 | hlist_for_each_entry(inst, pos, head, hlist) { |
| 100 | if (inst->group_num == group_num) |
| 101 | return inst; |
| 102 | } |
| 103 | return NULL; |
| 104 | } |
| 105 | |
| 106 | static inline void |
| 107 | instance_get(struct nfulnl_instance *inst) |
| 108 | { |
| 109 | atomic_inc(&inst->use); |
| 110 | } |
| 111 | |
| 112 | static struct nfulnl_instance * |
| 113 | instance_lookup_get(u_int16_t group_num) |
| 114 | { |
| 115 | struct nfulnl_instance *inst; |
| 116 | |
| 117 | read_lock_bh(&instances_lock); |
| 118 | inst = __instance_lookup(group_num); |
| 119 | if (inst) |
| 120 | instance_get(inst); |
| 121 | read_unlock_bh(&instances_lock); |
| 122 | |
| 123 | return inst; |
| 124 | } |
| 125 | |
| 126 | static void |
| 127 | instance_put(struct nfulnl_instance *inst) |
| 128 | { |
| 129 | if (inst && atomic_dec_and_test(&inst->use)) { |
| 130 | UDEBUG("kfree(inst=%p)\n", inst); |
| 131 | kfree(inst); |
Patrick McHardy | 7d90e86 | 2007-03-04 15:59:45 -0800 | [diff] [blame] | 132 | module_put(THIS_MODULE); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 133 | } |
| 134 | } |
| 135 | |
| 136 | static void nfulnl_timer(unsigned long data); |
| 137 | |
| 138 | static struct nfulnl_instance * |
| 139 | instance_create(u_int16_t group_num, int pid) |
| 140 | { |
| 141 | struct nfulnl_instance *inst; |
| 142 | |
| 143 | UDEBUG("entering (group_num=%u, pid=%d)\n", group_num, |
| 144 | pid); |
| 145 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 146 | write_lock_bh(&instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 147 | if (__instance_lookup(group_num)) { |
| 148 | inst = NULL; |
| 149 | UDEBUG("aborting, instance already exists\n"); |
| 150 | goto out_unlock; |
| 151 | } |
| 152 | |
Harald Welte | 10dfdc6 | 2005-11-03 19:20:07 +0100 | [diff] [blame] | 153 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 154 | if (!inst) |
| 155 | goto out_unlock; |
| 156 | |
Michal Miroslaw | aace57e | 2007-09-28 14:45:27 -0700 | [diff] [blame] | 157 | if (!try_module_get(THIS_MODULE)) { |
| 158 | kfree(inst); |
| 159 | goto out_unlock; |
| 160 | } |
| 161 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 162 | INIT_HLIST_NODE(&inst->hlist); |
YOSHIFUJI Hideaki | 181a46a | 2006-01-04 13:56:54 -0800 | [diff] [blame] | 163 | spin_lock_init(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 164 | /* needs to be two, since we _put() after creation */ |
| 165 | atomic_set(&inst->use, 2); |
| 166 | |
Patrick McHardy | e6f689d | 2007-03-23 11:16:30 -0700 | [diff] [blame] | 167 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 168 | |
| 169 | inst->peer_pid = pid; |
| 170 | inst->group_num = group_num; |
| 171 | |
| 172 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; |
| 173 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; |
| 174 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; |
| 175 | inst->copy_mode = NFULNL_COPY_PACKET; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 176 | inst->copy_range = NFULNL_COPY_RANGE_MAX; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 177 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 178 | hlist_add_head(&inst->hlist, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 179 | &instance_table[instance_hashfn(group_num)]); |
| 180 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 181 | UDEBUG("newly added node: %p, next=%p\n", &inst->hlist, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 182 | inst->hlist.next); |
| 183 | |
| 184 | write_unlock_bh(&instances_lock); |
| 185 | |
| 186 | return inst; |
| 187 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 188 | out_unlock: |
| 189 | write_unlock_bh(&instances_lock); |
| 190 | return NULL; |
| 191 | } |
| 192 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 193 | static void __nfulnl_flush(struct nfulnl_instance *inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 194 | |
| 195 | static void |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 196 | __instance_destroy(struct nfulnl_instance *inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 197 | { |
| 198 | /* first pull it out of the global list */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 199 | UDEBUG("removing instance %p (queuenum=%u) from hash\n", |
| 200 | inst, inst->group_num); |
| 201 | |
| 202 | hlist_del(&inst->hlist); |
| 203 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 204 | /* then flush all pending packets from skb */ |
| 205 | |
| 206 | spin_lock_bh(&inst->lock); |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 207 | if (inst->skb) |
| 208 | __nfulnl_flush(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 209 | spin_unlock_bh(&inst->lock); |
| 210 | |
| 211 | /* and finally put the refcount */ |
| 212 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | static inline void |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 216 | instance_destroy(struct nfulnl_instance *inst) |
| 217 | { |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 218 | write_lock_bh(&instances_lock); |
| 219 | __instance_destroy(inst); |
| 220 | write_unlock_bh(&instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static int |
| 224 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, |
| 225 | unsigned int range) |
| 226 | { |
| 227 | int status = 0; |
| 228 | |
| 229 | spin_lock_bh(&inst->lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 230 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 231 | switch (mode) { |
| 232 | case NFULNL_COPY_NONE: |
| 233 | case NFULNL_COPY_META: |
| 234 | inst->copy_mode = mode; |
| 235 | inst->copy_range = 0; |
| 236 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 237 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 238 | case NFULNL_COPY_PACKET: |
| 239 | inst->copy_mode = mode; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 240 | inst->copy_range = min_t(unsigned int, |
| 241 | range, NFULNL_COPY_RANGE_MAX); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 242 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 243 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 244 | default: |
| 245 | status = -EINVAL; |
| 246 | break; |
| 247 | } |
| 248 | |
| 249 | spin_unlock_bh(&inst->lock); |
| 250 | |
| 251 | return status; |
| 252 | } |
| 253 | |
| 254 | static int |
| 255 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) |
| 256 | { |
| 257 | int status; |
| 258 | |
| 259 | spin_lock_bh(&inst->lock); |
| 260 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) |
| 261 | status = -ERANGE; |
| 262 | else if (nlbufsiz > 131072) |
| 263 | status = -ERANGE; |
| 264 | else { |
| 265 | inst->nlbufsiz = nlbufsiz; |
| 266 | status = 0; |
| 267 | } |
| 268 | spin_unlock_bh(&inst->lock); |
| 269 | |
| 270 | return status; |
| 271 | } |
| 272 | |
| 273 | static int |
| 274 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) |
| 275 | { |
| 276 | spin_lock_bh(&inst->lock); |
| 277 | inst->flushtimeout = timeout; |
| 278 | spin_unlock_bh(&inst->lock); |
| 279 | |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | static int |
| 284 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) |
| 285 | { |
| 286 | spin_lock_bh(&inst->lock); |
| 287 | inst->qthreshold = qthresh; |
| 288 | spin_unlock_bh(&inst->lock); |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 293 | static int |
| 294 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) |
| 295 | { |
| 296 | spin_lock_bh(&inst->lock); |
Patrick McHardy | ee43353 | 2006-05-19 02:17:18 -0700 | [diff] [blame] | 297 | inst->flags = flags; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 298 | spin_unlock_bh(&inst->lock); |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 303 | static struct sk_buff * |
| 304 | nfulnl_alloc_skb(unsigned int inst_size, unsigned int pkt_size) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 305 | { |
| 306 | struct sk_buff *skb; |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 307 | unsigned int n; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 308 | |
| 309 | UDEBUG("entered (%u, %u)\n", inst_size, pkt_size); |
| 310 | |
| 311 | /* alloc skb which should be big enough for a whole multipart |
| 312 | * message. WARNING: has to be <= 128k due to slab restrictions */ |
| 313 | |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 314 | n = max(inst_size, pkt_size); |
| 315 | skb = alloc_skb(n, GFP_ATOMIC); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 316 | if (!skb) { |
| 317 | PRINTR("nfnetlink_log: can't alloc whole buffer (%u bytes)\n", |
| 318 | inst_size); |
| 319 | |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 320 | if (n > pkt_size) { |
| 321 | /* try to allocate only as much as we need for current |
| 322 | * packet */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 323 | |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 324 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
| 325 | if (!skb) |
| 326 | PRINTR("nfnetlink_log: can't even alloc %u " |
| 327 | "bytes\n", pkt_size); |
| 328 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | return skb; |
| 332 | } |
| 333 | |
| 334 | static int |
| 335 | __nfulnl_send(struct nfulnl_instance *inst) |
| 336 | { |
Eric Leblond | 29c5d4a | 2007-09-18 13:07:15 -0700 | [diff] [blame] | 337 | int status = -1; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 338 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 339 | if (inst->qlen > 1) |
Eric Leblond | 29c5d4a | 2007-09-18 13:07:15 -0700 | [diff] [blame] | 340 | NLMSG_PUT(inst->skb, 0, 0, |
| 341 | NLMSG_DONE, |
| 342 | sizeof(struct nfgenmsg)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 343 | |
| 344 | status = nfnetlink_unicast(inst->skb, inst->peer_pid, MSG_DONTWAIT); |
| 345 | if (status < 0) { |
| 346 | UDEBUG("netlink_unicast() failed\n"); |
| 347 | /* FIXME: statistics */ |
| 348 | } |
| 349 | |
| 350 | inst->qlen = 0; |
| 351 | inst->skb = NULL; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 352 | |
Eric Leblond | 29c5d4a | 2007-09-18 13:07:15 -0700 | [diff] [blame] | 353 | nlmsg_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 354 | return status; |
| 355 | } |
| 356 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 357 | static void |
| 358 | __nfulnl_flush(struct nfulnl_instance *inst) |
| 359 | { |
| 360 | /* timer holds a reference */ |
| 361 | if (del_timer(&inst->timer)) |
| 362 | instance_put(inst); |
| 363 | if (inst->skb) |
| 364 | __nfulnl_send(inst); |
| 365 | } |
| 366 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 367 | static void |
| 368 | nfulnl_timer(unsigned long data) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 369 | { |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 370 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 371 | |
| 372 | UDEBUG("timer function called, flushing buffer\n"); |
| 373 | |
| 374 | spin_lock_bh(&inst->lock); |
Michal Miroslaw | 370e6a8 | 2007-03-23 11:12:21 -0700 | [diff] [blame] | 375 | if (inst->skb) |
| 376 | __nfulnl_send(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 377 | spin_unlock_bh(&inst->lock); |
Michal Miroslaw | 05f7b7b | 2007-03-04 15:58:40 -0800 | [diff] [blame] | 378 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 379 | } |
| 380 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 381 | /* This is an inline function, we don't really care about a long |
| 382 | * list of arguments */ |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 383 | static inline int |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 384 | __build_packet_message(struct nfulnl_instance *inst, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 385 | const struct sk_buff *skb, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 386 | unsigned int data_len, |
| 387 | unsigned int pf, |
| 388 | unsigned int hooknum, |
| 389 | const struct net_device *indev, |
| 390 | const struct net_device *outdev, |
| 391 | const struct nf_loginfo *li, |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 392 | const char *prefix, unsigned int plen) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 393 | { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 394 | struct nfulnl_msg_packet_hdr pmsg; |
| 395 | struct nlmsghdr *nlh; |
| 396 | struct nfgenmsg *nfmsg; |
Al Viro | 98a4a86 | 2006-11-08 00:26:51 -0800 | [diff] [blame] | 397 | __be32 tmp_uint; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 398 | sk_buff_data_t old_tail = inst->skb->tail; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 399 | |
| 400 | UDEBUG("entered\n"); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 401 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 402 | nlh = NLMSG_PUT(inst->skb, 0, 0, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 403 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
| 404 | sizeof(struct nfgenmsg)); |
| 405 | nfmsg = NLMSG_DATA(nlh); |
| 406 | nfmsg->nfgen_family = pf; |
| 407 | nfmsg->version = NFNETLINK_V0; |
| 408 | nfmsg->res_id = htons(inst->group_num); |
| 409 | |
Al Viro | febf0a4 | 2006-11-03 00:59:17 -0800 | [diff] [blame] | 410 | pmsg.hw_protocol = skb->protocol; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 411 | pmsg.hook = hooknum; |
| 412 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 413 | NLA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 414 | |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 415 | if (prefix) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 416 | NLA_PUT(inst->skb, NFULA_PREFIX, plen, prefix); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 417 | |
| 418 | if (indev) { |
| 419 | tmp_uint = htonl(indev->ifindex); |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 420 | #ifndef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 421 | NLA_PUT(inst->skb, NFULA_IFINDEX_INDEV, sizeof(tmp_uint), |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 422 | &tmp_uint); |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 423 | #else |
| 424 | if (pf == PF_BRIDGE) { |
| 425 | /* Case 1: outdev is physical input device, we need to |
| 426 | * look for bridge group (when called from |
| 427 | * netfilter_bridge) */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 428 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 429 | sizeof(tmp_uint), &tmp_uint); |
| 430 | /* this is the bridge group "brX" */ |
| 431 | tmp_uint = htonl(indev->br_port->br->dev->ifindex); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 432 | NLA_PUT(inst->skb, NFULA_IFINDEX_INDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 433 | sizeof(tmp_uint), &tmp_uint); |
| 434 | } else { |
| 435 | /* Case 2: indev is bridge group, we need to look for |
| 436 | * physical device (when called from ipv4) */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 437 | NLA_PUT(inst->skb, NFULA_IFINDEX_INDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 438 | sizeof(tmp_uint), &tmp_uint); |
| 439 | if (skb->nf_bridge && skb->nf_bridge->physindev) { |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 440 | tmp_uint = |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 441 | htonl(skb->nf_bridge->physindev->ifindex); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 442 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 443 | sizeof(tmp_uint), &tmp_uint); |
| 444 | } |
| 445 | } |
| 446 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | if (outdev) { |
| 450 | tmp_uint = htonl(outdev->ifindex); |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 451 | #ifndef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 452 | NLA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, sizeof(tmp_uint), |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 453 | &tmp_uint); |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 454 | #else |
| 455 | if (pf == PF_BRIDGE) { |
| 456 | /* Case 1: outdev is physical output device, we need to |
| 457 | * look for bridge group (when called from |
| 458 | * netfilter_bridge) */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 459 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 460 | sizeof(tmp_uint), &tmp_uint); |
| 461 | /* this is the bridge group "brX" */ |
| 462 | tmp_uint = htonl(outdev->br_port->br->dev->ifindex); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 463 | NLA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 464 | sizeof(tmp_uint), &tmp_uint); |
| 465 | } else { |
| 466 | /* Case 2: indev is a bridge group, we need to look |
| 467 | * for physical device (when called from ipv4) */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 468 | NLA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 469 | sizeof(tmp_uint), &tmp_uint); |
Patrick McHardy | ba5dcee | 2007-03-06 20:24:53 -0800 | [diff] [blame] | 470 | if (skb->nf_bridge && skb->nf_bridge->physoutdev) { |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 471 | tmp_uint = |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 472 | htonl(skb->nf_bridge->physoutdev->ifindex); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 473 | NLA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 474 | sizeof(tmp_uint), &tmp_uint); |
| 475 | } |
| 476 | } |
| 477 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 478 | } |
| 479 | |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 480 | if (skb->mark) { |
| 481 | tmp_uint = htonl(skb->mark); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 482 | NLA_PUT(inst->skb, NFULA_MARK, sizeof(tmp_uint), &tmp_uint); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 483 | } |
| 484 | |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 485 | if (indev && skb->dev) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 486 | struct nfulnl_msg_packet_hw phw; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 487 | int len = dev_parse_header(skb, phw.hw_addr); |
| 488 | if (len > 0) { |
| 489 | phw.hw_addrlen = htons(len); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 490 | NLA_PUT(inst->skb, NFULA_HWADDR, sizeof(phw), &phw); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 491 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 492 | } |
| 493 | |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 494 | if (skb->tstamp.tv64) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 495 | struct nfulnl_msg_packet_timestamp ts; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 496 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
| 497 | ts.sec = cpu_to_be64(tv.tv_sec); |
| 498 | ts.usec = cpu_to_be64(tv.tv_usec); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 499 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 500 | NLA_PUT(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | /* UID */ |
| 504 | if (skb->sk) { |
| 505 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 506 | if (skb->sk->sk_socket && skb->sk->sk_socket->file) { |
Al Viro | 98a4a86 | 2006-11-08 00:26:51 -0800 | [diff] [blame] | 507 | __be32 uid = htonl(skb->sk->sk_socket->file->f_uid); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 508 | /* need to unlock here since NLA_PUT may goto */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 509 | read_unlock_bh(&skb->sk->sk_callback_lock); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 510 | NLA_PUT(inst->skb, NFULA_UID, sizeof(uid), &uid); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 511 | } else |
| 512 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 513 | } |
| 514 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 515 | /* local sequence number */ |
| 516 | if (inst->flags & NFULNL_CFG_F_SEQ) { |
| 517 | tmp_uint = htonl(inst->seq++); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 518 | NLA_PUT(inst->skb, NFULA_SEQ, sizeof(tmp_uint), &tmp_uint); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 519 | } |
| 520 | /* global sequence number */ |
| 521 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) { |
Patrick McHardy | 7fdeaf6 | 2006-11-14 19:47:09 -0800 | [diff] [blame] | 522 | tmp_uint = htonl(atomic_inc_return(&global_seq)); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 523 | NLA_PUT(inst->skb, NFULA_SEQ_GLOBAL, sizeof(tmp_uint), &tmp_uint); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 524 | } |
| 525 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 526 | if (data_len) { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 527 | struct nlattr *nla; |
| 528 | int size = nla_attr_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 529 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 530 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 531 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); |
| 532 | goto nlmsg_failure; |
| 533 | } |
| 534 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 535 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
| 536 | nla->nla_type = NFULA_PAYLOAD; |
| 537 | nla->nla_len = size; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 538 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 539 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 540 | BUG(); |
| 541 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 542 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 543 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
| 544 | return 0; |
| 545 | |
| 546 | nlmsg_failure: |
| 547 | UDEBUG("nlmsg_failure\n"); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 548 | nla_put_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 549 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
| 550 | return -1; |
| 551 | } |
| 552 | |
| 553 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) |
| 554 | |
| 555 | static struct nf_loginfo default_loginfo = { |
| 556 | .type = NF_LOG_TYPE_ULOG, |
| 557 | .u = { |
| 558 | .ulog = { |
| 559 | .copy_len = 0xffff, |
| 560 | .group = 0, |
| 561 | .qthreshold = 1, |
| 562 | }, |
| 563 | }, |
| 564 | }; |
| 565 | |
| 566 | /* log handler for internal netfilter logging api */ |
| 567 | static void |
| 568 | nfulnl_log_packet(unsigned int pf, |
| 569 | unsigned int hooknum, |
| 570 | const struct sk_buff *skb, |
| 571 | const struct net_device *in, |
| 572 | const struct net_device *out, |
| 573 | const struct nf_loginfo *li_user, |
| 574 | const char *prefix) |
| 575 | { |
| 576 | unsigned int size, data_len; |
| 577 | struct nfulnl_instance *inst; |
| 578 | const struct nf_loginfo *li; |
| 579 | unsigned int qthreshold; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 580 | unsigned int plen; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 581 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 582 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 583 | li = li_user; |
| 584 | else |
| 585 | li = &default_loginfo; |
| 586 | |
| 587 | inst = instance_lookup_get(li->u.ulog.group); |
| 588 | if (!inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 589 | return; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 590 | |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 591 | plen = 0; |
| 592 | if (prefix) |
Patrick McHardy | 881dbfe | 2007-03-06 20:24:35 -0800 | [diff] [blame] | 593 | plen = strlen(prefix) + 1; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 594 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 595 | /* FIXME: do we want to make the size calculation conditional based on |
| 596 | * what is actually present? way more branches and checks, but more |
| 597 | * memory efficient... */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 598 | size = NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
| 599 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) |
| 600 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 601 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 602 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 603 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 604 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 605 | #endif |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 606 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
| 607 | + nla_total_size(sizeof(u_int32_t)) /* uid */ |
| 608 | + nla_total_size(plen) /* prefix */ |
| 609 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) |
| 610 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 611 | |
| 612 | UDEBUG("initial size=%u\n", size); |
| 613 | |
| 614 | spin_lock_bh(&inst->lock); |
| 615 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 616 | if (inst->flags & NFULNL_CFG_F_SEQ) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 617 | size += nla_total_size(sizeof(u_int32_t)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 618 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 619 | size += nla_total_size(sizeof(u_int32_t)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 620 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 621 | qthreshold = inst->qthreshold; |
| 622 | /* per-rule qthreshold overrides per-instance */ |
| 623 | if (qthreshold > li->u.ulog.qthreshold) |
| 624 | qthreshold = li->u.ulog.qthreshold; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 625 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 626 | switch (inst->copy_mode) { |
| 627 | case NFULNL_COPY_META: |
| 628 | case NFULNL_COPY_NONE: |
| 629 | data_len = 0; |
| 630 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 631 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 632 | case NFULNL_COPY_PACKET: |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 633 | if (inst->copy_range == 0 |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 634 | || inst->copy_range > skb->len) |
| 635 | data_len = skb->len; |
| 636 | else |
| 637 | data_len = inst->copy_range; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 638 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 639 | size += nla_total_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 640 | UDEBUG("copy_packet, therefore size now %u\n", size); |
| 641 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 642 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 643 | default: |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 644 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 645 | } |
| 646 | |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 647 | if (inst->skb && |
| 648 | size > skb_tailroom(inst->skb) - sizeof(struct nfgenmsg)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 649 | /* either the queue len is too high or we don't have |
| 650 | * enough room in the skb left. flush to userspace. */ |
| 651 | UDEBUG("flushing old skb\n"); |
| 652 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 653 | __nfulnl_flush(inst); |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 654 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 655 | |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 656 | if (!inst->skb) { |
| 657 | inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size); |
| 658 | if (!inst->skb) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 659 | goto alloc_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | UDEBUG("qlen %d, qthreshold %d\n", inst->qlen, qthreshold); |
| 663 | inst->qlen++; |
| 664 | |
| 665 | __build_packet_message(inst, skb, data_len, pf, |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 666 | hooknum, in, out, li, prefix, plen); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 667 | |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 668 | if (inst->qlen >= qthreshold) |
| 669 | __nfulnl_flush(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 670 | /* timer_pending always called within inst->lock, so there |
| 671 | * is no chance of a race here */ |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 672 | else if (!timer_pending(&inst->timer)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 673 | instance_get(inst); |
| 674 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); |
| 675 | add_timer(&inst->timer); |
| 676 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 677 | |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 678 | unlock_and_release: |
| 679 | spin_unlock_bh(&inst->lock); |
| 680 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 681 | return; |
| 682 | |
| 683 | alloc_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 684 | UDEBUG("error allocating skb\n"); |
| 685 | /* FIXME: statistics */ |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 686 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 687 | } |
| 688 | |
| 689 | static int |
| 690 | nfulnl_rcv_nl_event(struct notifier_block *this, |
| 691 | unsigned long event, void *ptr) |
| 692 | { |
| 693 | struct netlink_notify *n = ptr; |
| 694 | |
| 695 | if (event == NETLINK_URELEASE && |
| 696 | n->protocol == NETLINK_NETFILTER && n->pid) { |
| 697 | int i; |
| 698 | |
| 699 | /* destroy all instances for this pid */ |
| 700 | write_lock_bh(&instances_lock); |
| 701 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
| 702 | struct hlist_node *tmp, *t2; |
| 703 | struct nfulnl_instance *inst; |
| 704 | struct hlist_head *head = &instance_table[i]; |
| 705 | |
| 706 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { |
| 707 | UDEBUG("node = %p\n", inst); |
Eric W. Biederman | b4b5102 | 2007-09-12 13:05:38 +0200 | [diff] [blame] | 708 | if ((n->net == &init_net) && |
| 709 | (n->pid == inst->peer_pid)) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 710 | __instance_destroy(inst); |
| 711 | } |
| 712 | } |
| 713 | write_unlock_bh(&instances_lock); |
| 714 | } |
| 715 | return NOTIFY_DONE; |
| 716 | } |
| 717 | |
| 718 | static struct notifier_block nfulnl_rtnl_notifier = { |
| 719 | .notifier_call = nfulnl_rcv_nl_event, |
| 720 | }; |
| 721 | |
| 722 | static int |
| 723 | nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 724 | struct nlmsghdr *nlh, struct nlattr *nfqa[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 725 | { |
| 726 | return -ENOTSUPP; |
| 727 | } |
| 728 | |
| 729 | static struct nf_logger nfulnl_logger = { |
| 730 | .name = "nfnetlink_log", |
| 731 | .logfn = &nfulnl_log_packet, |
| 732 | .me = THIS_MODULE, |
| 733 | }; |
| 734 | |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 735 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
| 736 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, |
| 737 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, |
| 738 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, |
| 739 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, |
| 740 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, |
| 741 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 742 | }; |
| 743 | |
| 744 | static int |
| 745 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 746 | struct nlmsghdr *nlh, struct nlattr *nfula[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 747 | { |
| 748 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 749 | u_int16_t group_num = ntohs(nfmsg->res_id); |
| 750 | struct nfulnl_instance *inst; |
| 751 | int ret = 0; |
| 752 | |
| 753 | UDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type)); |
| 754 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 755 | inst = instance_lookup_get(group_num); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 756 | if (nfula[NFULA_CFG_CMD]) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 757 | u_int8_t pf = nfmsg->nfgen_family; |
| 758 | struct nfulnl_msg_config_cmd *cmd; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 759 | cmd = nla_data(nfula[NFULA_CFG_CMD]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 760 | UDEBUG("found CFG_CMD for\n"); |
| 761 | |
| 762 | switch (cmd->command) { |
| 763 | case NFULNL_CFG_CMD_BIND: |
| 764 | if (inst) { |
| 765 | ret = -EBUSY; |
| 766 | goto out_put; |
| 767 | } |
| 768 | |
| 769 | inst = instance_create(group_num, |
| 770 | NETLINK_CB(skb).pid); |
| 771 | if (!inst) { |
| 772 | ret = -EINVAL; |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 773 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 774 | } |
| 775 | break; |
| 776 | case NFULNL_CFG_CMD_UNBIND: |
| 777 | if (!inst) { |
| 778 | ret = -ENODEV; |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 779 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 780 | } |
| 781 | |
| 782 | if (inst->peer_pid != NETLINK_CB(skb).pid) { |
| 783 | ret = -EPERM; |
| 784 | goto out_put; |
| 785 | } |
| 786 | |
| 787 | instance_destroy(inst); |
Michal Miroslaw | 9a36e8c | 2007-03-23 11:11:48 -0700 | [diff] [blame] | 788 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 789 | case NFULNL_CFG_CMD_PF_BIND: |
| 790 | UDEBUG("registering log handler for pf=%u\n", pf); |
| 791 | ret = nf_log_register(pf, &nfulnl_logger); |
| 792 | break; |
| 793 | case NFULNL_CFG_CMD_PF_UNBIND: |
| 794 | UDEBUG("unregistering log handler for pf=%u\n", pf); |
| 795 | /* This is a bug and a feature. We cannot unregister |
| 796 | * other handlers, like nfnetlink_inst can */ |
| 797 | nf_log_unregister_pf(pf); |
| 798 | break; |
| 799 | default: |
| 800 | ret = -EINVAL; |
| 801 | break; |
| 802 | } |
Michal Miroslaw | dd16704 | 2007-03-04 15:59:20 -0800 | [diff] [blame] | 803 | |
| 804 | if (!inst) |
| 805 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 806 | } else { |
| 807 | if (!inst) { |
| 808 | UDEBUG("no config command, and no instance for " |
| 809 | "group=%u pid=%u =>ENOENT\n", |
| 810 | group_num, NETLINK_CB(skb).pid); |
| 811 | ret = -ENOENT; |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 812 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 813 | } |
| 814 | |
| 815 | if (inst->peer_pid != NETLINK_CB(skb).pid) { |
| 816 | UDEBUG("no config command, and wrong pid\n"); |
| 817 | ret = -EPERM; |
| 818 | goto out_put; |
| 819 | } |
| 820 | } |
| 821 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 822 | if (nfula[NFULA_CFG_MODE]) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 823 | struct nfulnl_msg_config_mode *params; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 824 | params = nla_data(nfula[NFULA_CFG_MODE]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 825 | |
| 826 | nfulnl_set_mode(inst, params->copy_mode, |
Al Viro | d1208b9 | 2006-11-03 00:58:41 -0800 | [diff] [blame] | 827 | ntohl(params->copy_range)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 828 | } |
| 829 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 830 | if (nfula[NFULA_CFG_TIMEOUT]) { |
Al Viro | 98a4a86 | 2006-11-08 00:26:51 -0800 | [diff] [blame] | 831 | __be32 timeout = |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 832 | *(__be32 *)nla_data(nfula[NFULA_CFG_TIMEOUT]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 833 | |
| 834 | nfulnl_set_timeout(inst, ntohl(timeout)); |
| 835 | } |
| 836 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 837 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
Al Viro | 98a4a86 | 2006-11-08 00:26:51 -0800 | [diff] [blame] | 838 | __be32 nlbufsiz = |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 839 | *(__be32 *)nla_data(nfula[NFULA_CFG_NLBUFSIZ]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 840 | |
| 841 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); |
| 842 | } |
| 843 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 844 | if (nfula[NFULA_CFG_QTHRESH]) { |
Al Viro | 7ac00a2 | 2006-11-03 00:58:17 -0800 | [diff] [blame] | 845 | __be32 qthresh = |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 846 | *(__be32 *)nla_data(nfula[NFULA_CFG_QTHRESH]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 847 | |
| 848 | nfulnl_set_qthresh(inst, ntohl(qthresh)); |
| 849 | } |
| 850 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 851 | if (nfula[NFULA_CFG_FLAGS]) { |
Al Viro | 98a4a86 | 2006-11-08 00:26:51 -0800 | [diff] [blame] | 852 | __be16 flags = |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 853 | *(__be16 *)nla_data(nfula[NFULA_CFG_FLAGS]); |
Patrick McHardy | ee43353 | 2006-05-19 02:17:18 -0700 | [diff] [blame] | 854 | nfulnl_set_flags(inst, ntohs(flags)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 855 | } |
| 856 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 857 | out_put: |
| 858 | instance_put(inst); |
Michal Miroslaw | dd16704 | 2007-03-04 15:59:20 -0800 | [diff] [blame] | 859 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 860 | return ret; |
| 861 | } |
| 862 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 863 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 864 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
Harald Welte | 37d2e7a | 2005-11-14 15:24:59 -0800 | [diff] [blame] | 865 | .attr_count = NFULA_MAX, }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 866 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 867 | .attr_count = NFULA_CFG_MAX, |
| 868 | .policy = nfula_cfg_policy }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 869 | }; |
| 870 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 871 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 872 | .name = "log", |
| 873 | .subsys_id = NFNL_SUBSYS_ULOG, |
| 874 | .cb_count = NFULNL_MSG_MAX, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 875 | .cb = nfulnl_cb, |
| 876 | }; |
| 877 | |
| 878 | #ifdef CONFIG_PROC_FS |
| 879 | struct iter_state { |
| 880 | unsigned int bucket; |
| 881 | }; |
| 882 | |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 883 | static struct hlist_node *get_first(struct iter_state *st) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 884 | { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 885 | if (!st) |
| 886 | return NULL; |
| 887 | |
| 888 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
| 889 | if (!hlist_empty(&instance_table[st->bucket])) |
| 890 | return instance_table[st->bucket].first; |
| 891 | } |
| 892 | return NULL; |
| 893 | } |
| 894 | |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 895 | static struct hlist_node *get_next(struct iter_state *st, struct hlist_node *h) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 896 | { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 897 | h = h->next; |
| 898 | while (!h) { |
| 899 | if (++st->bucket >= INSTANCE_BUCKETS) |
| 900 | return NULL; |
| 901 | |
| 902 | h = instance_table[st->bucket].first; |
| 903 | } |
| 904 | return h; |
| 905 | } |
| 906 | |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 907 | static struct hlist_node *get_idx(struct iter_state *st, loff_t pos) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 908 | { |
| 909 | struct hlist_node *head; |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 910 | head = get_first(st); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 911 | |
| 912 | if (head) |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 913 | while (pos && (head = get_next(st, head))) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 914 | pos--; |
| 915 | return pos ? NULL : head; |
| 916 | } |
| 917 | |
| 918 | static void *seq_start(struct seq_file *seq, loff_t *pos) |
| 919 | { |
| 920 | read_lock_bh(&instances_lock); |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 921 | return get_idx(seq->private, *pos); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 922 | } |
| 923 | |
| 924 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 925 | { |
| 926 | (*pos)++; |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 927 | return get_next(s->private, v); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 928 | } |
| 929 | |
| 930 | static void seq_stop(struct seq_file *s, void *v) |
| 931 | { |
| 932 | read_unlock_bh(&instances_lock); |
| 933 | } |
| 934 | |
| 935 | static int seq_show(struct seq_file *s, void *v) |
| 936 | { |
| 937 | const struct nfulnl_instance *inst = v; |
| 938 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 939 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 940 | inst->group_num, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 941 | inst->peer_pid, inst->qlen, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 942 | inst->copy_mode, inst->copy_range, |
| 943 | inst->flushtimeout, atomic_read(&inst->use)); |
| 944 | } |
| 945 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 946 | static const struct seq_operations nful_seq_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 947 | .start = seq_start, |
| 948 | .next = seq_next, |
| 949 | .stop = seq_stop, |
| 950 | .show = seq_show, |
| 951 | }; |
| 952 | |
| 953 | static int nful_open(struct inode *inode, struct file *file) |
| 954 | { |
Pavel Emelyanov | e2da591 | 2007-10-10 02:29:58 -0700 | [diff] [blame] | 955 | return seq_open_private(file, &nful_seq_ops, |
| 956 | sizeof(struct iter_state)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 957 | } |
| 958 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 959 | static const struct file_operations nful_file_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 960 | .owner = THIS_MODULE, |
| 961 | .open = nful_open, |
| 962 | .read = seq_read, |
| 963 | .llseek = seq_lseek, |
| 964 | .release = seq_release_private, |
| 965 | }; |
| 966 | |
| 967 | #endif /* PROC_FS */ |
| 968 | |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 969 | static int __init nfnetlink_log_init(void) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 970 | { |
| 971 | int i, status = -ENOMEM; |
| 972 | #ifdef CONFIG_PROC_FS |
| 973 | struct proc_dir_entry *proc_nful; |
| 974 | #endif |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 975 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 976 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
| 977 | INIT_HLIST_HEAD(&instance_table[i]); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 978 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 979 | /* it's not really all that important to have a random value, so |
| 980 | * we can do this from the init function, even if there hasn't |
| 981 | * been that much entropy yet */ |
| 982 | get_random_bytes(&hash_init, sizeof(hash_init)); |
| 983 | |
| 984 | netlink_register_notifier(&nfulnl_rtnl_notifier); |
| 985 | status = nfnetlink_subsys_register(&nfulnl_subsys); |
| 986 | if (status < 0) { |
| 987 | printk(KERN_ERR "log: failed to create netlink socket\n"); |
| 988 | goto cleanup_netlink_notifier; |
| 989 | } |
| 990 | |
| 991 | #ifdef CONFIG_PROC_FS |
| 992 | proc_nful = create_proc_entry("nfnetlink_log", 0440, |
| 993 | proc_net_netfilter); |
| 994 | if (!proc_nful) |
| 995 | goto cleanup_subsys; |
| 996 | proc_nful->proc_fops = &nful_file_ops; |
| 997 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 998 | return status; |
| 999 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1000 | #ifdef CONFIG_PROC_FS |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1001 | cleanup_subsys: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1002 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1003 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1004 | cleanup_netlink_notifier: |
| 1005 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
| 1006 | return status; |
| 1007 | } |
| 1008 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1009 | static void __exit nfnetlink_log_fini(void) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1010 | { |
Patrick McHardy | e92ad99 | 2007-02-12 11:11:55 -0800 | [diff] [blame] | 1011 | nf_log_unregister(&nfulnl_logger); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1012 | #ifdef CONFIG_PROC_FS |
| 1013 | remove_proc_entry("nfnetlink_log", proc_net_netfilter); |
| 1014 | #endif |
| 1015 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
| 1016 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1017 | } |
| 1018 | |
| 1019 | MODULE_DESCRIPTION("netfilter userspace logging"); |
| 1020 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 1021 | MODULE_LICENSE("GPL"); |
Harald Welte | f682fae | 2005-08-09 20:20:34 -0700 | [diff] [blame] | 1022 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1023 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1024 | module_init(nfnetlink_log_init); |
| 1025 | module_exit(nfnetlink_log_fini); |