2 * This is a module which is used for queueing packets and communicating with
3 * userspace via nfetlink.
5 * (C) 2005 by Harald Welte <laforge@netfilter.org>
7 * Based on the old ipv4-only ip_queue.c:
8 * (C) 2000-2002 James Morris <jmorris@intercode.com.au>
9 * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/module.h>
17 #include <linux/skbuff.h>
18 #include <linux/init.h>
19 #include <linux/spinlock.h>
20 #include <linux/notifier.h>
21 #include <linux/netdevice.h>
22 #include <linux/netfilter.h>
23 #include <linux/proc_fs.h>
24 #include <linux/netfilter_ipv4.h>
25 #include <linux/netfilter_ipv6.h>
26 #include <linux/netfilter/nfnetlink.h>
27 #include <linux/netfilter/nfnetlink_queue.h>
28 #include <linux/list.h>
30 #include <net/netfilter/nf_queue.h>
32 #include <asm/atomic.h>
34 #ifdef CONFIG_BRIDGE_NETFILTER
35 #include "../bridge/br_private.h"
38 #define NFQNL_QMAX_DEFAULT 1024
41 #define QDEBUG(x, args ...) printk(KERN_DEBUG "%s(%d):%s(): " x, \
42 __FILE__, __LINE__, __FUNCTION__, \
45 #define QDEBUG(x, ...)
48 struct nfqnl_instance {
49 struct hlist_node hlist; /* global list of queues */
53 unsigned int queue_maxlen;
54 unsigned int copy_range;
55 unsigned int queue_total;
56 unsigned int queue_dropped;
57 unsigned int queue_user_dropped;
59 unsigned int id_sequence; /* 'sequence' of pkt ids */
61 u_int16_t queue_num; /* number of this queue */
66 struct list_head queue_list; /* packets in queue */
69 typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long);
71 static DEFINE_SPINLOCK(instances_lock);
73 #define INSTANCE_BUCKETS 16
74 static struct hlist_head instance_table[INSTANCE_BUCKETS];
76 static inline u_int8_t instance_hashfn(u_int16_t queue_num)
78 return ((queue_num >> 8) | queue_num) % INSTANCE_BUCKETS;
81 static struct nfqnl_instance *
82 instance_lookup(u_int16_t queue_num)
84 struct hlist_head *head;
85 struct hlist_node *pos;
86 struct nfqnl_instance *inst;
88 head = &instance_table[instance_hashfn(queue_num)];
89 hlist_for_each_entry_rcu(inst, pos, head, hlist) {
90 if (inst->queue_num == queue_num)
96 static struct nfqnl_instance *
97 instance_create(u_int16_t queue_num, int pid)
99 struct nfqnl_instance *inst;
102 QDEBUG("entering for queue_num=%u, pid=%d\n", queue_num, pid);
104 spin_lock(&instances_lock);
105 if (instance_lookup(queue_num)) {
107 QDEBUG("aborting, instance already exists\n");
111 inst = kzalloc(sizeof(*inst), GFP_ATOMIC);
115 inst->queue_num = queue_num;
116 inst->peer_pid = pid;
117 inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
118 inst->copy_range = 0xfffff;
119 inst->copy_mode = NFQNL_COPY_NONE;
120 spin_lock_init(&inst->lock);
121 INIT_LIST_HEAD(&inst->queue_list);
122 INIT_RCU_HEAD(&inst->rcu);
124 if (!try_module_get(THIS_MODULE))
127 h = instance_hashfn(queue_num);
128 hlist_add_head_rcu(&inst->hlist, &instance_table[h]);
130 spin_unlock(&instances_lock);
132 QDEBUG("successfully created new instance\n");
139 spin_unlock(&instances_lock);
143 static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
147 instance_destroy_rcu(struct rcu_head *head)
149 struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance,
152 nfqnl_flush(inst, NULL, 0);
154 module_put(THIS_MODULE);
158 __instance_destroy(struct nfqnl_instance *inst)
160 hlist_del_rcu(&inst->hlist);
161 call_rcu(&inst->rcu, instance_destroy_rcu);
165 instance_destroy(struct nfqnl_instance *inst)
167 spin_lock(&instances_lock);
168 __instance_destroy(inst);
169 spin_unlock(&instances_lock);
173 __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
175 list_add_tail(&entry->list, &queue->queue_list);
176 queue->queue_total++;
180 __nfqnl_set_mode(struct nfqnl_instance *queue,
181 unsigned char mode, unsigned int range)
186 case NFQNL_COPY_NONE:
187 case NFQNL_COPY_META:
188 queue->copy_mode = mode;
189 queue->copy_range = 0;
192 case NFQNL_COPY_PACKET:
193 queue->copy_mode = mode;
194 /* we're using struct nlattr which has 16bit nla_len */
196 queue->copy_range = 0xffff;
198 queue->copy_range = range;
208 static struct nf_queue_entry *
209 find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id)
211 struct nf_queue_entry *entry = NULL, *i;
213 spin_lock_bh(&queue->lock);
215 list_for_each_entry(i, &queue->queue_list, list) {
223 list_del(&entry->list);
224 queue->queue_total--;
227 spin_unlock_bh(&queue->lock);
233 nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data)
235 struct nf_queue_entry *entry, *next;
237 spin_lock_bh(&queue->lock);
238 list_for_each_entry_safe(entry, next, &queue->queue_list, list) {
239 if (!cmpfn || cmpfn(entry, data)) {
240 list_del(&entry->list);
241 queue->queue_total--;
242 nf_reinject(entry, NF_DROP);
245 spin_unlock_bh(&queue->lock);
248 static struct sk_buff *
249 nfqnl_build_packet_message(struct nfqnl_instance *queue,
250 struct nf_queue_entry *entry, int *errp)
252 sk_buff_data_t old_tail;
256 struct nfqnl_msg_packet_hdr pmsg;
257 struct nlmsghdr *nlh;
258 struct nfgenmsg *nfmsg;
259 struct sk_buff *entskb = entry->skb;
260 struct net_device *indev;
261 struct net_device *outdev;
266 size = NLMSG_ALIGN(sizeof(struct nfgenmsg))
267 + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
268 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
269 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
270 #ifdef CONFIG_BRIDGE_NETFILTER
271 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
272 + nla_total_size(sizeof(u_int32_t)) /* ifindex */
274 + nla_total_size(sizeof(u_int32_t)) /* mark */
275 + nla_total_size(sizeof(struct nfqnl_msg_packet_hw))
276 + nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp));
278 outdev = entry->outdev;
280 spin_lock_bh(&queue->lock);
282 switch (queue->copy_mode) {
283 case NFQNL_COPY_META:
284 case NFQNL_COPY_NONE:
288 case NFQNL_COPY_PACKET:
289 if ((entskb->ip_summed == CHECKSUM_PARTIAL ||
290 entskb->ip_summed == CHECKSUM_COMPLETE) &&
291 (*errp = skb_checksum_help(entskb))) {
292 spin_unlock_bh(&queue->lock);
295 if (queue->copy_range == 0
296 || queue->copy_range > entskb->len)
297 data_len = entskb->len;
299 data_len = queue->copy_range;
301 size += nla_total_size(data_len);
306 spin_unlock_bh(&queue->lock);
310 entry->id = queue->id_sequence++;
312 spin_unlock_bh(&queue->lock);
314 skb = alloc_skb(size, GFP_ATOMIC);
318 old_tail = skb->tail;
319 nlh = NLMSG_PUT(skb, 0, 0,
320 NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
321 sizeof(struct nfgenmsg));
322 nfmsg = NLMSG_DATA(nlh);
323 nfmsg->nfgen_family = entry->pf;
324 nfmsg->version = NFNETLINK_V0;
325 nfmsg->res_id = htons(queue->queue_num);
327 pmsg.packet_id = htonl(entry->id);
328 pmsg.hw_protocol = entskb->protocol;
329 pmsg.hook = entry->hook;
331 NLA_PUT(skb, NFQA_PACKET_HDR, sizeof(pmsg), &pmsg);
333 indev = entry->indev;
335 tmp_uint = htonl(indev->ifindex);
336 #ifndef CONFIG_BRIDGE_NETFILTER
337 NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), &tmp_uint);
339 if (entry->pf == PF_BRIDGE) {
340 /* Case 1: indev is physical input device, we need to
341 * look for bridge group (when called from
342 * netfilter_bridge) */
343 NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, sizeof(tmp_uint),
345 /* this is the bridge group "brX" */
346 tmp_uint = htonl(indev->br_port->br->dev->ifindex);
347 NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint),
350 /* Case 2: indev is bridge group, we need to look for
351 * physical device (when called from ipv4) */
352 NLA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint),
354 if (entskb->nf_bridge
355 && entskb->nf_bridge->physindev) {
356 tmp_uint = htonl(entskb->nf_bridge->physindev->ifindex);
357 NLA_PUT(skb, NFQA_IFINDEX_PHYSINDEV,
358 sizeof(tmp_uint), &tmp_uint);
365 tmp_uint = htonl(outdev->ifindex);
366 #ifndef CONFIG_BRIDGE_NETFILTER
367 NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), &tmp_uint);
369 if (entry->pf == PF_BRIDGE) {
370 /* Case 1: outdev is physical output device, we need to
371 * look for bridge group (when called from
372 * netfilter_bridge) */
373 NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, sizeof(tmp_uint),
375 /* this is the bridge group "brX" */
376 tmp_uint = htonl(outdev->br_port->br->dev->ifindex);
377 NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint),
380 /* Case 2: outdev is bridge group, we need to look for
381 * physical output device (when called from ipv4) */
382 NLA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint),
384 if (entskb->nf_bridge
385 && entskb->nf_bridge->physoutdev) {
386 tmp_uint = htonl(entskb->nf_bridge->physoutdev->ifindex);
387 NLA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV,
388 sizeof(tmp_uint), &tmp_uint);
395 tmp_uint = htonl(entskb->mark);
396 NLA_PUT(skb, NFQA_MARK, sizeof(u_int32_t), &tmp_uint);
399 if (indev && entskb->dev) {
400 struct nfqnl_msg_packet_hw phw;
401 int len = dev_parse_header(entskb, phw.hw_addr);
403 phw.hw_addrlen = htons(len);
404 NLA_PUT(skb, NFQA_HWADDR, sizeof(phw), &phw);
408 if (entskb->tstamp.tv64) {
409 struct nfqnl_msg_packet_timestamp ts;
410 struct timeval tv = ktime_to_timeval(entskb->tstamp);
411 ts.sec = cpu_to_be64(tv.tv_sec);
412 ts.usec = cpu_to_be64(tv.tv_usec);
414 NLA_PUT(skb, NFQA_TIMESTAMP, sizeof(ts), &ts);
419 int size = nla_attr_size(data_len);
421 if (skb_tailroom(skb) < nla_total_size(data_len)) {
422 printk(KERN_WARNING "nf_queue: no tailroom!\n");
426 nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len));
427 nla->nla_type = NFQA_PAYLOAD;
430 if (skb_copy_bits(entskb, 0, nla_data(nla), data_len))
434 nlh->nlmsg_len = skb->tail - old_tail;
443 printk(KERN_ERR "nf_queue: error creating packet message\n");
448 nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
450 int status = -EINVAL;
451 struct sk_buff *nskb;
452 struct nfqnl_instance *queue;
456 /* rcu_read_lock()ed by nf_hook_slow() */
457 queue = instance_lookup(queuenum);
459 QDEBUG("no queue instance matching\n");
463 if (queue->copy_mode == NFQNL_COPY_NONE) {
464 QDEBUG("mode COPY_NONE, aborting\n");
468 nskb = nfqnl_build_packet_message(queue, entry, &status);
472 spin_lock_bh(&queue->lock);
474 if (!queue->peer_pid)
475 goto err_out_free_nskb;
477 if (queue->queue_total >= queue->queue_maxlen) {
478 queue->queue_dropped++;
481 printk(KERN_WARNING "nf_queue: full at %d entries, "
482 "dropping packets(s). Dropped: %d\n",
483 queue->queue_total, queue->queue_dropped);
484 goto err_out_free_nskb;
487 /* nfnetlink_unicast will either free the nskb or add it to a socket */
488 status = nfnetlink_unicast(nskb, queue->peer_pid, MSG_DONTWAIT);
490 queue->queue_user_dropped++;
494 __enqueue_entry(queue, entry);
496 spin_unlock_bh(&queue->lock);
503 spin_unlock_bh(&queue->lock);
508 nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e)
513 diff = data_len - e->skb->len;
515 if (pskb_trim(e->skb, data_len))
517 } else if (diff > 0) {
518 if (data_len > 0xFFFF)
520 if (diff > skb_tailroom(e->skb)) {
521 err = pskb_expand_head(e->skb, 0,
522 diff - skb_tailroom(e->skb),
525 printk(KERN_WARNING "nf_queue: OOM "
526 "in mangle, dropping packet\n");
530 skb_put(e->skb, diff);
532 if (!skb_make_writable(e->skb, data_len))
534 skb_copy_to_linear_data(e->skb, data, data_len);
535 e->skb->ip_summed = CHECKSUM_NONE;
540 nfqnl_set_mode(struct nfqnl_instance *queue,
541 unsigned char mode, unsigned int range)
545 spin_lock_bh(&queue->lock);
546 status = __nfqnl_set_mode(queue, mode, range);
547 spin_unlock_bh(&queue->lock);
553 dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex)
556 if (entry->indev->ifindex == ifindex)
559 if (entry->outdev->ifindex == ifindex)
561 #ifdef CONFIG_BRIDGE_NETFILTER
562 if (entry->skb->nf_bridge) {
563 if (entry->skb->nf_bridge->physindev &&
564 entry->skb->nf_bridge->physindev->ifindex == ifindex)
566 if (entry->skb->nf_bridge->physoutdev &&
567 entry->skb->nf_bridge->physoutdev->ifindex == ifindex)
574 /* drop all packets with either indev or outdev == ifindex from all queue
577 nfqnl_dev_drop(int ifindex)
581 QDEBUG("entering for ifindex %u\n", ifindex);
585 for (i = 0; i < INSTANCE_BUCKETS; i++) {
586 struct hlist_node *tmp;
587 struct nfqnl_instance *inst;
588 struct hlist_head *head = &instance_table[i];
590 hlist_for_each_entry_rcu(inst, tmp, head, hlist)
591 nfqnl_flush(inst, dev_cmp, ifindex);
597 #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
600 nfqnl_rcv_dev_event(struct notifier_block *this,
601 unsigned long event, void *ptr)
603 struct net_device *dev = ptr;
605 if (dev->nd_net != &init_net)
608 /* Drop any packets associated with the downed device */
609 if (event == NETDEV_DOWN)
610 nfqnl_dev_drop(dev->ifindex);
614 static struct notifier_block nfqnl_dev_notifier = {
615 .notifier_call = nfqnl_rcv_dev_event,
619 nfqnl_rcv_nl_event(struct notifier_block *this,
620 unsigned long event, void *ptr)
622 struct netlink_notify *n = ptr;
624 if (event == NETLINK_URELEASE &&
625 n->protocol == NETLINK_NETFILTER && n->pid) {
628 /* destroy all instances for this pid */
629 spin_lock(&instances_lock);
630 for (i = 0; i < INSTANCE_BUCKETS; i++) {
631 struct hlist_node *tmp, *t2;
632 struct nfqnl_instance *inst;
633 struct hlist_head *head = &instance_table[i];
635 hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) {
636 if ((n->net == &init_net) &&
637 (n->pid == inst->peer_pid))
638 __instance_destroy(inst);
641 spin_unlock(&instances_lock);
646 static struct notifier_block nfqnl_rtnl_notifier = {
647 .notifier_call = nfqnl_rcv_nl_event,
650 static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
651 [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
652 [NFQA_MARK] = { .type = NLA_U32 },
653 [NFQA_PAYLOAD] = { .type = NLA_UNSPEC },
657 nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
658 struct nlmsghdr *nlh, struct nlattr *nfqa[])
660 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
661 u_int16_t queue_num = ntohs(nfmsg->res_id);
663 struct nfqnl_msg_verdict_hdr *vhdr;
664 struct nfqnl_instance *queue;
665 unsigned int verdict;
666 struct nf_queue_entry *entry;
670 queue = instance_lookup(queue_num);
676 if (queue->peer_pid != NETLINK_CB(skb).pid) {
681 if (!nfqa[NFQA_VERDICT_HDR]) {
686 vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]);
687 verdict = ntohl(vhdr->verdict);
689 if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT) {
694 entry = find_dequeue_entry(queue, ntohl(vhdr->id));
701 if (nfqa[NFQA_PAYLOAD]) {
702 if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]),
703 nla_len(nfqa[NFQA_PAYLOAD]), entry) < 0)
708 entry->skb->mark = ntohl(*(__be32 *)
709 nla_data(nfqa[NFQA_MARK]));
711 nf_reinject(entry, verdict);
720 nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
721 struct nlmsghdr *nlh, struct nlattr *nfqa[])
726 static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = {
727 [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) },
728 [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) },
731 static const struct nf_queue_handler nfqh = {
733 .outfn = &nfqnl_enqueue_packet,
737 nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
738 struct nlmsghdr *nlh, struct nlattr *nfqa[])
740 struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
741 u_int16_t queue_num = ntohs(nfmsg->res_id);
742 struct nfqnl_instance *queue;
743 struct nfqnl_msg_config_cmd *cmd = NULL;
746 QDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type));
748 if (nfqa[NFQA_CFG_CMD]) {
749 cmd = nla_data(nfqa[NFQA_CFG_CMD]);
751 /* Commands without queue context - might sleep */
752 switch (cmd->command) {
753 case NFQNL_CFG_CMD_PF_BIND:
754 ret = nf_register_queue_handler(ntohs(cmd->pf),
757 case NFQNL_CFG_CMD_PF_UNBIND:
758 ret = nf_unregister_queue_handler(ntohs(cmd->pf),
770 queue = instance_lookup(queue_num);
771 if (queue && queue->peer_pid != NETLINK_CB(skb).pid) {
777 switch (cmd->command) {
778 case NFQNL_CFG_CMD_BIND:
783 queue = instance_create(queue_num, NETLINK_CB(skb).pid);
789 case NFQNL_CFG_CMD_UNBIND:
794 instance_destroy(queue);
796 case NFQNL_CFG_CMD_PF_BIND:
797 case NFQNL_CFG_CMD_PF_UNBIND:
805 if (nfqa[NFQA_CFG_PARAMS]) {
806 struct nfqnl_msg_config_params *params;
812 params = nla_data(nfqa[NFQA_CFG_PARAMS]);
813 nfqnl_set_mode(queue, params->copy_mode,
814 ntohl(params->copy_range));
817 if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) {
818 __be32 *queue_maxlen;
824 queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]);
825 spin_lock_bh(&queue->lock);
826 queue->queue_maxlen = ntohl(*queue_maxlen);
827 spin_unlock_bh(&queue->lock);
835 static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
836 [NFQNL_MSG_PACKET] = { .call = nfqnl_recv_unsupp,
837 .attr_count = NFQA_MAX, },
838 [NFQNL_MSG_VERDICT] = { .call = nfqnl_recv_verdict,
839 .attr_count = NFQA_MAX,
840 .policy = nfqa_verdict_policy },
841 [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config,
842 .attr_count = NFQA_CFG_MAX,
843 .policy = nfqa_cfg_policy },
846 static const struct nfnetlink_subsystem nfqnl_subsys = {
848 .subsys_id = NFNL_SUBSYS_QUEUE,
849 .cb_count = NFQNL_MSG_MAX,
853 #ifdef CONFIG_PROC_FS
858 static struct hlist_node *get_first(struct seq_file *seq)
860 struct iter_state *st = seq->private;
865 for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
866 if (!hlist_empty(&instance_table[st->bucket]))
867 return instance_table[st->bucket].first;
872 static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
874 struct iter_state *st = seq->private;
878 if (++st->bucket >= INSTANCE_BUCKETS)
881 h = instance_table[st->bucket].first;
886 static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
888 struct hlist_node *head;
889 head = get_first(seq);
892 while (pos && (head = get_next(seq, head)))
894 return pos ? NULL : head;
897 static void *seq_start(struct seq_file *seq, loff_t *pos)
899 spin_lock(&instances_lock);
900 return get_idx(seq, *pos);
903 static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
906 return get_next(s, v);
909 static void seq_stop(struct seq_file *s, void *v)
911 spin_unlock(&instances_lock);
914 static int seq_show(struct seq_file *s, void *v)
916 const struct nfqnl_instance *inst = v;
918 return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n",
920 inst->peer_pid, inst->queue_total,
921 inst->copy_mode, inst->copy_range,
922 inst->queue_dropped, inst->queue_user_dropped,
923 inst->id_sequence, 1);
926 static const struct seq_operations nfqnl_seq_ops = {
933 static int nfqnl_open(struct inode *inode, struct file *file)
935 return seq_open_private(file, &nfqnl_seq_ops,
936 sizeof(struct iter_state));
939 static const struct file_operations nfqnl_file_ops = {
940 .owner = THIS_MODULE,
944 .release = seq_release_private,
949 static int __init nfnetlink_queue_init(void)
951 int i, status = -ENOMEM;
952 #ifdef CONFIG_PROC_FS
953 struct proc_dir_entry *proc_nfqueue;
956 for (i = 0; i < INSTANCE_BUCKETS; i++)
957 INIT_HLIST_HEAD(&instance_table[i]);
959 netlink_register_notifier(&nfqnl_rtnl_notifier);
960 status = nfnetlink_subsys_register(&nfqnl_subsys);
962 printk(KERN_ERR "nf_queue: failed to create netlink socket\n");
963 goto cleanup_netlink_notifier;
966 #ifdef CONFIG_PROC_FS
967 proc_nfqueue = create_proc_entry("nfnetlink_queue", 0440,
971 proc_nfqueue->proc_fops = &nfqnl_file_ops;
974 register_netdevice_notifier(&nfqnl_dev_notifier);
977 #ifdef CONFIG_PROC_FS
979 nfnetlink_subsys_unregister(&nfqnl_subsys);
981 cleanup_netlink_notifier:
982 netlink_unregister_notifier(&nfqnl_rtnl_notifier);
986 static void __exit nfnetlink_queue_fini(void)
988 nf_unregister_queue_handlers(&nfqh);
989 unregister_netdevice_notifier(&nfqnl_dev_notifier);
990 #ifdef CONFIG_PROC_FS
991 remove_proc_entry("nfnetlink_queue", proc_net_netfilter);
993 nfnetlink_subsys_unregister(&nfqnl_subsys);
994 netlink_unregister_notifier(&nfqnl_rtnl_notifier);
997 MODULE_DESCRIPTION("netfilter packet queue handler");
998 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
999 MODULE_LICENSE("GPL");
1000 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
1002 module_init(nfnetlink_queue_init);
1003 module_exit(nfnetlink_queue_fini);