Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This is a module which is used for queueing packets and communicating with |
Jesper Dangaard Brouer | 67137f3 | 2009-06-08 03:11:33 +0000 | [diff] [blame] | 3 | * userspace via nfnetlink. |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 4 | * |
| 5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> |
Patrick McHardy | 4ad9d4f | 2007-12-05 01:31:17 -0800 | [diff] [blame] | 6 | * (C) 2007 by Patrick McHardy <kaber@trash.net> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 7 | * |
| 8 | * Based on the old ipv4-only ip_queue.c: |
| 9 | * (C) 2000-2002 James Morris <jmorris@intercode.com.au> |
| 10 | * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License version 2 as |
| 14 | * published by the Free Software Foundation. |
| 15 | * |
| 16 | */ |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/spinlock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 21 | #include <linux/slab.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 22 | #include <linux/notifier.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/netfilter.h> |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 25 | #include <linux/proc_fs.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 26 | #include <linux/netfilter_ipv4.h> |
| 27 | #include <linux/netfilter_ipv6.h> |
| 28 | #include <linux/netfilter/nfnetlink.h> |
| 29 | #include <linux/netfilter/nfnetlink_queue.h> |
| 30 | #include <linux/list.h> |
| 31 | #include <net/sock.h> |
Patrick McHardy | c01cd42 | 2007-12-05 01:24:48 -0800 | [diff] [blame] | 32 | #include <net/netfilter/nf_queue.h> |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 33 | #include <net/netfilter/nfnetlink_queue.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 34 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 35 | #include <linux/atomic.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 36 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 37 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 38 | #include "../bridge/br_private.h" |
| 39 | #endif |
| 40 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 41 | #define NFQNL_QMAX_DEFAULT 1024 |
| 42 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 43 | struct nfqnl_instance { |
| 44 | struct hlist_node hlist; /* global list of queues */ |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 45 | struct rcu_head rcu; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 46 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 47 | int peer_portid; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 48 | unsigned int queue_maxlen; |
| 49 | unsigned int copy_range; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 50 | unsigned int queue_dropped; |
| 51 | unsigned int queue_user_dropped; |
| 52 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 53 | |
| 54 | u_int16_t queue_num; /* number of this queue */ |
| 55 | u_int8_t copy_mode; |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 56 | u_int32_t flags; /* Set using NFQA_CFG_FLAGS */ |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 57 | /* |
| 58 | * Following fields are dirtied for each queued packet, |
| 59 | * keep them in same cache line if possible. |
| 60 | */ |
| 61 | spinlock_t lock; |
| 62 | unsigned int queue_total; |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 63 | unsigned int id_sequence; /* 'sequence' of pkt ids */ |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 64 | struct list_head queue_list; /* packets in queue */ |
| 65 | }; |
| 66 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 67 | typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 68 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 69 | static DEFINE_SPINLOCK(instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 70 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 71 | #define INSTANCE_BUCKETS 16 |
Patrick McHardy | 9d6023a | 2007-12-05 01:29:38 -0800 | [diff] [blame] | 72 | static struct hlist_head instance_table[INSTANCE_BUCKETS] __read_mostly; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 73 | |
| 74 | static inline u_int8_t instance_hashfn(u_int16_t queue_num) |
| 75 | { |
Pablo Neira Ayuso | 1cdb090 | 2013-03-14 06:03:17 +0000 | [diff] [blame^] | 76 | return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | static struct nfqnl_instance * |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 80 | instance_lookup(u_int16_t queue_num) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 81 | { |
| 82 | struct hlist_head *head; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 83 | struct nfqnl_instance *inst; |
| 84 | |
| 85 | head = &instance_table[instance_hashfn(queue_num)]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 86 | hlist_for_each_entry_rcu(inst, head, hlist) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 87 | if (inst->queue_num == queue_num) |
| 88 | return inst; |
| 89 | } |
| 90 | return NULL; |
| 91 | } |
| 92 | |
| 93 | static struct nfqnl_instance * |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 94 | instance_create(u_int16_t queue_num, int portid) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 95 | { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 96 | struct nfqnl_instance *inst; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 97 | unsigned int h; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 98 | int err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 99 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 100 | spin_lock(&instances_lock); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 101 | if (instance_lookup(queue_num)) { |
| 102 | err = -EEXIST; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 103 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 104 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 105 | |
Harald Welte | 10dfdc6 | 2005-11-03 19:20:07 +0100 | [diff] [blame] | 106 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 107 | if (!inst) { |
| 108 | err = -ENOMEM; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 109 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 110 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 111 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 112 | inst->queue_num = queue_num; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 113 | inst->peer_portid = portid; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 114 | inst->queue_maxlen = NFQNL_QMAX_DEFAULT; |
| 115 | inst->copy_range = 0xfffff; |
| 116 | inst->copy_mode = NFQNL_COPY_NONE; |
YOSHIFUJI Hideaki | 181a46a | 2006-01-04 13:56:54 -0800 | [diff] [blame] | 117 | spin_lock_init(&inst->lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 118 | INIT_LIST_HEAD(&inst->queue_list); |
| 119 | |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 120 | if (!try_module_get(THIS_MODULE)) { |
| 121 | err = -EAGAIN; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 122 | goto out_free; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 123 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 124 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 125 | h = instance_hashfn(queue_num); |
| 126 | hlist_add_head_rcu(&inst->hlist, &instance_table[h]); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 127 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 128 | spin_unlock(&instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 129 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 130 | return inst; |
| 131 | |
| 132 | out_free: |
| 133 | kfree(inst); |
| 134 | out_unlock: |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 135 | spin_unlock(&instances_lock); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 136 | return ERR_PTR(err); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 137 | } |
| 138 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 139 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
| 140 | unsigned long data); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 141 | |
| 142 | static void |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 143 | instance_destroy_rcu(struct rcu_head *head) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 144 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 145 | struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance, |
| 146 | rcu); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 147 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 148 | nfqnl_flush(inst, NULL, 0); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 149 | kfree(inst); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 150 | module_put(THIS_MODULE); |
| 151 | } |
| 152 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 153 | static void |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 154 | __instance_destroy(struct nfqnl_instance *inst) |
| 155 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 156 | hlist_del_rcu(&inst->hlist); |
| 157 | call_rcu(&inst->rcu, instance_destroy_rcu); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 160 | static void |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 161 | instance_destroy(struct nfqnl_instance *inst) |
| 162 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 163 | spin_lock(&instances_lock); |
| 164 | __instance_destroy(inst); |
| 165 | spin_unlock(&instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 166 | } |
| 167 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 168 | static inline void |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 169 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 170 | { |
Patrick McHardy | 0ac41e8 | 2007-12-05 01:25:03 -0800 | [diff] [blame] | 171 | list_add_tail(&entry->list, &queue->queue_list); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 172 | queue->queue_total++; |
| 173 | } |
| 174 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 175 | static void |
| 176 | __dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
| 177 | { |
| 178 | list_del(&entry->list); |
| 179 | queue->queue_total--; |
| 180 | } |
| 181 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 182 | static struct nf_queue_entry * |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 183 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 184 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 185 | struct nf_queue_entry *entry = NULL, *i; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 186 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 187 | spin_lock_bh(&queue->lock); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 188 | |
| 189 | list_for_each_entry(i, &queue->queue_list, list) { |
| 190 | if (i->id == id) { |
| 191 | entry = i; |
| 192 | break; |
| 193 | } |
| 194 | } |
| 195 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 196 | if (entry) |
| 197 | __dequeue_entry(queue, entry); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 198 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 199 | spin_unlock_bh(&queue->lock); |
| 200 | |
| 201 | return entry; |
| 202 | } |
| 203 | |
| 204 | static void |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 205 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 206 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 207 | struct nf_queue_entry *entry, *next; |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 208 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 209 | spin_lock_bh(&queue->lock); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 210 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
| 211 | if (!cmpfn || cmpfn(entry, data)) { |
| 212 | list_del(&entry->list); |
| 213 | queue->queue_total--; |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame] | 214 | nf_reinject(entry, NF_DROP); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 215 | } |
| 216 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 217 | spin_unlock_bh(&queue->lock); |
| 218 | } |
| 219 | |
| 220 | static struct sk_buff * |
| 221 | nfqnl_build_packet_message(struct nfqnl_instance *queue, |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 222 | struct nf_queue_entry *entry, |
| 223 | __be32 **packet_id_ptr) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 224 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 225 | sk_buff_data_t old_tail; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 226 | size_t size; |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 227 | size_t data_len = 0, cap_len = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 228 | struct sk_buff *skb; |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 229 | struct nlattr *nla; |
| 230 | struct nfqnl_msg_packet_hdr *pmsg; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 231 | struct nlmsghdr *nlh; |
| 232 | struct nfgenmsg *nfmsg; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 233 | struct sk_buff *entskb = entry->skb; |
| 234 | struct net_device *indev; |
| 235 | struct net_device *outdev; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 236 | struct nf_conn *ct = NULL; |
| 237 | enum ip_conntrack_info uninitialized_var(ctinfo); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 238 | |
Eric Leblond | cabaa9b | 2008-03-10 16:41:43 -0700 | [diff] [blame] | 239 | size = NLMSG_SPACE(sizeof(struct nfgenmsg)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 240 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) |
| 241 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 242 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 243 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 244 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 245 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 246 | #endif |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 247 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
| 248 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 249 | + nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp) |
| 250 | + nla_total_size(sizeof(u_int32_t))); /* cap_len */ |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 251 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 252 | outdev = entry->outdev; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 253 | |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 254 | switch ((enum nfqnl_config_mode)ACCESS_ONCE(queue->copy_mode)) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 255 | case NFQNL_COPY_META: |
| 256 | case NFQNL_COPY_NONE: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 257 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 258 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 259 | case NFQNL_COPY_PACKET: |
Herbert Xu | e9f13ca | 2010-04-08 14:54:35 +0200 | [diff] [blame] | 260 | if (entskb->ip_summed == CHECKSUM_PARTIAL && |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 261 | skb_checksum_help(entskb)) |
Patrick McHardy | e7dfb09 | 2005-09-06 15:10:00 -0700 | [diff] [blame] | 262 | return NULL; |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 263 | |
| 264 | data_len = ACCESS_ONCE(queue->copy_range); |
| 265 | if (data_len == 0 || data_len > entskb->len) |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 266 | data_len = entskb->len; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 267 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 268 | size += nla_total_size(data_len); |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 269 | cap_len = entskb->len; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 270 | break; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 271 | } |
| 272 | |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 273 | if (queue->flags & NFQA_CFG_F_CONNTRACK) |
| 274 | ct = nfqnl_ct_get(entskb, &size, &ctinfo); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 275 | |
| 276 | skb = alloc_skb(size, GFP_ATOMIC); |
| 277 | if (!skb) |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 278 | return NULL; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 279 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 280 | old_tail = skb->tail; |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 281 | nlh = nlmsg_put(skb, 0, 0, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 282 | NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET, |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 283 | sizeof(struct nfgenmsg), 0); |
| 284 | if (!nlh) { |
| 285 | kfree_skb(skb); |
| 286 | return NULL; |
| 287 | } |
| 288 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 289 | nfmsg->nfgen_family = entry->pf; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 290 | nfmsg->version = NFNETLINK_V0; |
| 291 | nfmsg->res_id = htons(queue->queue_num); |
| 292 | |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 293 | nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg)); |
| 294 | pmsg = nla_data(nla); |
| 295 | pmsg->hw_protocol = entskb->protocol; |
| 296 | pmsg->hook = entry->hook; |
| 297 | *packet_id_ptr = &pmsg->packet_id; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 298 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 299 | indev = entry->indev; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 300 | if (indev) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 301 | #ifndef CONFIG_BRIDGE_NETFILTER |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 302 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex))) |
| 303 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 304 | #else |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 305 | if (entry->pf == PF_BRIDGE) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 306 | /* Case 1: indev is physical input device, we need to |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 307 | * look for bridge group (when called from |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 308 | * netfilter_bridge) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 309 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
| 310 | htonl(indev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 311 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 312 | /* rcu_read_lock()ed by __nf_queue */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 313 | nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
| 314 | htonl(br_port_get_rcu(indev)->br->dev->ifindex))) |
| 315 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 316 | } else { |
| 317 | /* Case 2: indev is bridge group, we need to look for |
| 318 | * physical device (when called from ipv4) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 319 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
| 320 | htonl(indev->ifindex))) |
| 321 | goto nla_put_failure; |
| 322 | if (entskb->nf_bridge && entskb->nf_bridge->physindev && |
| 323 | nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
| 324 | htonl(entskb->nf_bridge->physindev->ifindex))) |
| 325 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 326 | } |
| 327 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 328 | } |
| 329 | |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 330 | if (outdev) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 331 | #ifndef CONFIG_BRIDGE_NETFILTER |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 332 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex))) |
| 333 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 334 | #else |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 335 | if (entry->pf == PF_BRIDGE) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 336 | /* Case 1: outdev is physical output device, we need to |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 337 | * look for bridge group (when called from |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 338 | * netfilter_bridge) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 339 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
| 340 | htonl(outdev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 341 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 342 | /* rcu_read_lock()ed by __nf_queue */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 343 | nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
| 344 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) |
| 345 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 346 | } else { |
| 347 | /* Case 2: outdev is bridge group, we need to look for |
| 348 | * physical output device (when called from ipv4) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 349 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
| 350 | htonl(outdev->ifindex))) |
| 351 | goto nla_put_failure; |
| 352 | if (entskb->nf_bridge && entskb->nf_bridge->physoutdev && |
| 353 | nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
| 354 | htonl(entskb->nf_bridge->physoutdev->ifindex))) |
| 355 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 356 | } |
| 357 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 358 | } |
| 359 | |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 360 | if (entskb->mark && |
| 361 | nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark))) |
| 362 | goto nla_put_failure; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 363 | |
Nicolas Cavallari | 2c38de4 | 2011-06-16 17:27:04 +0200 | [diff] [blame] | 364 | if (indev && entskb->dev && |
| 365 | entskb->mac_header != entskb->network_header) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 366 | struct nfqnl_msg_packet_hw phw; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 367 | int len = dev_parse_header(entskb, phw.hw_addr); |
| 368 | if (len) { |
| 369 | phw.hw_addrlen = htons(len); |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 370 | if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw)) |
| 371 | goto nla_put_failure; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 372 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 373 | } |
| 374 | |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 375 | if (entskb->tstamp.tv64) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 376 | struct nfqnl_msg_packet_timestamp ts; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 377 | struct timeval tv = ktime_to_timeval(entskb->tstamp); |
| 378 | ts.sec = cpu_to_be64(tv.tv_sec); |
| 379 | ts.usec = cpu_to_be64(tv.tv_usec); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 380 | |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 381 | if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts)) |
| 382 | goto nla_put_failure; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | if (data_len) { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 386 | struct nlattr *nla; |
Eric Dumazet | ca7c48c | 2008-01-31 03:53:27 -0800 | [diff] [blame] | 387 | int sz = nla_attr_size(data_len); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 388 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 389 | if (skb_tailroom(skb) < nla_total_size(data_len)) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 390 | printk(KERN_WARNING "nf_queue: no tailroom!\n"); |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 391 | kfree_skb(skb); |
| 392 | return NULL; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 395 | nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len)); |
| 396 | nla->nla_type = NFQA_PAYLOAD; |
Eric Dumazet | ca7c48c | 2008-01-31 03:53:27 -0800 | [diff] [blame] | 397 | nla->nla_len = sz; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 398 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 399 | if (skb_copy_bits(entskb, 0, nla_data(nla), data_len)) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 400 | BUG(); |
| 401 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 402 | |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 403 | if (ct && nfqnl_ct_put(skb, ct, ctinfo) < 0) |
| 404 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 405 | |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 406 | if (cap_len > 0 && nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) |
| 407 | goto nla_put_failure; |
| 408 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 409 | nlh->nlmsg_len = skb->tail - old_tail; |
| 410 | return skb; |
| 411 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 412 | nla_put_failure: |
Wei Yongjun | a672995 | 2012-08-28 03:14:15 +0000 | [diff] [blame] | 413 | kfree_skb(skb); |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 414 | net_err_ratelimited("nf_queue: error creating packet message\n"); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 415 | return NULL; |
| 416 | } |
| 417 | |
| 418 | static int |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 419 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 420 | { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 421 | struct sk_buff *nskb; |
| 422 | struct nfqnl_instance *queue; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 423 | int err = -ENOBUFS; |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 424 | __be32 *packet_id_ptr; |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 425 | int failopen = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 426 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 427 | /* rcu_read_lock()ed by nf_hook_slow() */ |
| 428 | queue = instance_lookup(queuenum); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 429 | if (!queue) { |
| 430 | err = -ESRCH; |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 431 | goto err_out; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 432 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 433 | |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 434 | if (queue->copy_mode == NFQNL_COPY_NONE) { |
| 435 | err = -EINVAL; |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 436 | goto err_out; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 437 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 438 | |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 439 | nskb = nfqnl_build_packet_message(queue, entry, &packet_id_ptr); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 440 | if (nskb == NULL) { |
| 441 | err = -ENOMEM; |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 442 | goto err_out; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 443 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 444 | spin_lock_bh(&queue->lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 445 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 446 | if (!queue->peer_portid) { |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 447 | err = -EINVAL; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 448 | goto err_out_free_nskb; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 449 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 450 | if (queue->queue_total >= queue->queue_maxlen) { |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 451 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
| 452 | failopen = 1; |
| 453 | err = 0; |
| 454 | } else { |
| 455 | queue->queue_dropped++; |
| 456 | net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n", |
| 457 | queue->queue_total); |
| 458 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 459 | goto err_out_free_nskb; |
| 460 | } |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 461 | entry->id = ++queue->id_sequence; |
| 462 | *packet_id_ptr = htonl(entry->id); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 463 | |
| 464 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 465 | err = nfnetlink_unicast(nskb, &init_net, queue->peer_portid, MSG_DONTWAIT); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 466 | if (err < 0) { |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 467 | queue->queue_user_dropped++; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 468 | goto err_out_unlock; |
| 469 | } |
| 470 | |
| 471 | __enqueue_entry(queue, entry); |
| 472 | |
| 473 | spin_unlock_bh(&queue->lock); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 474 | return 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 475 | |
| 476 | err_out_free_nskb: |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 477 | kfree_skb(nskb); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 478 | err_out_unlock: |
| 479 | spin_unlock_bh(&queue->lock); |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 480 | if (failopen) |
| 481 | nf_reinject(entry, NF_ACCEPT); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 482 | err_out: |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 483 | return err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | static int |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 487 | nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e, int diff) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 488 | { |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 489 | struct sk_buff *nskb; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 490 | |
Patrick McHardy | d8a585d | 2006-11-14 19:48:09 -0800 | [diff] [blame] | 491 | if (diff < 0) { |
| 492 | if (pskb_trim(e->skb, data_len)) |
| 493 | return -ENOMEM; |
| 494 | } else if (diff > 0) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 495 | if (data_len > 0xFFFF) |
| 496 | return -EINVAL; |
| 497 | if (diff > skb_tailroom(e->skb)) { |
Arnaud Ebalard | 9a732ed | 2008-04-29 03:16:34 -0700 | [diff] [blame] | 498 | nskb = skb_copy_expand(e->skb, skb_headroom(e->skb), |
| 499 | diff, GFP_ATOMIC); |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 500 | if (!nskb) { |
Patrick McHardy | 1158ba2 | 2006-08-22 00:32:47 -0700 | [diff] [blame] | 501 | printk(KERN_WARNING "nf_queue: OOM " |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 502 | "in mangle, dropping packet\n"); |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 503 | return -ENOMEM; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 504 | } |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 505 | kfree_skb(e->skb); |
| 506 | e->skb = nskb; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 507 | } |
| 508 | skb_put(e->skb, diff); |
| 509 | } |
Herbert Xu | 37d4187 | 2007-10-14 00:39:18 -0700 | [diff] [blame] | 510 | if (!skb_make_writable(e->skb, data_len)) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 511 | return -ENOMEM; |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 512 | skb_copy_to_linear_data(e->skb, data, data_len); |
Patrick McHardy | e7dfb09 | 2005-09-06 15:10:00 -0700 | [diff] [blame] | 513 | e->skb->ip_summed = CHECKSUM_NONE; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 514 | return 0; |
| 515 | } |
| 516 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 517 | static int |
| 518 | nfqnl_set_mode(struct nfqnl_instance *queue, |
| 519 | unsigned char mode, unsigned int range) |
| 520 | { |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 521 | int status = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 522 | |
| 523 | spin_lock_bh(&queue->lock); |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 524 | switch (mode) { |
| 525 | case NFQNL_COPY_NONE: |
| 526 | case NFQNL_COPY_META: |
| 527 | queue->copy_mode = mode; |
| 528 | queue->copy_range = 0; |
| 529 | break; |
| 530 | |
| 531 | case NFQNL_COPY_PACKET: |
| 532 | queue->copy_mode = mode; |
Pablo Neira Ayuso | ba8d3b0 | 2012-09-06 17:09:26 +0200 | [diff] [blame] | 533 | /* We're using struct nlattr which has 16bit nla_len. Note that |
| 534 | * nla_len includes the header length. Thus, the maximum packet |
| 535 | * length that we support is 65531 bytes. We send truncated |
| 536 | * packets if the specified length is larger than that. |
| 537 | */ |
| 538 | if (range > 0xffff - NLA_HDRLEN) |
| 539 | queue->copy_range = 0xffff - NLA_HDRLEN; |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 540 | else |
| 541 | queue->copy_range = range; |
| 542 | break; |
| 543 | |
| 544 | default: |
| 545 | status = -EINVAL; |
| 546 | |
| 547 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 548 | spin_unlock_bh(&queue->lock); |
| 549 | |
| 550 | return status; |
| 551 | } |
| 552 | |
| 553 | static int |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 554 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 555 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 556 | if (entry->indev) |
| 557 | if (entry->indev->ifindex == ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 558 | return 1; |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 559 | if (entry->outdev) |
| 560 | if (entry->outdev->ifindex == ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 561 | return 1; |
Patrick McHardy | ef47c6a7 | 2006-06-27 03:01:48 -0700 | [diff] [blame] | 562 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 563 | if (entry->skb->nf_bridge) { |
| 564 | if (entry->skb->nf_bridge->physindev && |
| 565 | entry->skb->nf_bridge->physindev->ifindex == ifindex) |
| 566 | return 1; |
| 567 | if (entry->skb->nf_bridge->physoutdev && |
| 568 | entry->skb->nf_bridge->physoutdev->ifindex == ifindex) |
| 569 | return 1; |
| 570 | } |
| 571 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 572 | return 0; |
| 573 | } |
| 574 | |
| 575 | /* drop all packets with either indev or outdev == ifindex from all queue |
| 576 | * instances */ |
| 577 | static void |
| 578 | nfqnl_dev_drop(int ifindex) |
| 579 | { |
| 580 | int i; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 581 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 582 | rcu_read_lock(); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 583 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 584 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 585 | struct nfqnl_instance *inst; |
| 586 | struct hlist_head *head = &instance_table[i]; |
| 587 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 588 | hlist_for_each_entry_rcu(inst, head, hlist) |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 589 | nfqnl_flush(inst, dev_cmp, ifindex); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 590 | } |
| 591 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 592 | rcu_read_unlock(); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 593 | } |
| 594 | |
| 595 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) |
| 596 | |
| 597 | static int |
| 598 | nfqnl_rcv_dev_event(struct notifier_block *this, |
| 599 | unsigned long event, void *ptr) |
| 600 | { |
| 601 | struct net_device *dev = ptr; |
| 602 | |
YOSHIFUJI Hideaki | 721499e | 2008-07-19 22:34:43 -0700 | [diff] [blame] | 603 | if (!net_eq(dev_net(dev), &init_net)) |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 604 | return NOTIFY_DONE; |
| 605 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 606 | /* Drop any packets associated with the downed device */ |
| 607 | if (event == NETDEV_DOWN) |
| 608 | nfqnl_dev_drop(dev->ifindex); |
| 609 | return NOTIFY_DONE; |
| 610 | } |
| 611 | |
| 612 | static struct notifier_block nfqnl_dev_notifier = { |
| 613 | .notifier_call = nfqnl_rcv_dev_event, |
| 614 | }; |
| 615 | |
| 616 | static int |
| 617 | nfqnl_rcv_nl_event(struct notifier_block *this, |
| 618 | unsigned long event, void *ptr) |
| 619 | { |
| 620 | struct netlink_notify *n = ptr; |
| 621 | |
Patrick McHardy | dee5817 | 2009-11-06 17:04:00 +0100 | [diff] [blame] | 622 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 623 | int i; |
| 624 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 625 | /* destroy all instances for this portid */ |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 626 | spin_lock(&instances_lock); |
| 627 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 628 | struct hlist_node *t2; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 629 | struct nfqnl_instance *inst; |
| 630 | struct hlist_head *head = &instance_table[i]; |
| 631 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 632 | hlist_for_each_entry_safe(inst, t2, head, hlist) { |
Eric W. Biederman | b4b5102 | 2007-09-12 13:05:38 +0200 | [diff] [blame] | 633 | if ((n->net == &init_net) && |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 634 | (n->portid == inst->peer_portid)) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 635 | __instance_destroy(inst); |
| 636 | } |
| 637 | } |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 638 | spin_unlock(&instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 639 | } |
| 640 | return NOTIFY_DONE; |
| 641 | } |
| 642 | |
| 643 | static struct notifier_block nfqnl_rtnl_notifier = { |
| 644 | .notifier_call = nfqnl_rcv_nl_event, |
| 645 | }; |
| 646 | |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 647 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
| 648 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, |
| 649 | [NFQA_MARK] = { .type = NLA_U32 }, |
| 650 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 651 | [NFQA_CT] = { .type = NLA_UNSPEC }, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 652 | }; |
| 653 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 654 | static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = { |
| 655 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, |
| 656 | [NFQA_MARK] = { .type = NLA_U32 }, |
| 657 | }; |
| 658 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 659 | static struct nfqnl_instance *verdict_instance_lookup(u16 queue_num, int nlportid) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 660 | { |
| 661 | struct nfqnl_instance *queue; |
| 662 | |
| 663 | queue = instance_lookup(queue_num); |
| 664 | if (!queue) |
| 665 | return ERR_PTR(-ENODEV); |
| 666 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 667 | if (queue->peer_portid != nlportid) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 668 | return ERR_PTR(-EPERM); |
| 669 | |
| 670 | return queue; |
| 671 | } |
| 672 | |
| 673 | static struct nfqnl_msg_verdict_hdr* |
| 674 | verdicthdr_get(const struct nlattr * const nfqa[]) |
| 675 | { |
| 676 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 677 | unsigned int verdict; |
| 678 | |
| 679 | if (!nfqa[NFQA_VERDICT_HDR]) |
| 680 | return NULL; |
| 681 | |
| 682 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); |
Florian Westphal | c667523 | 2011-08-30 15:01:20 +0200 | [diff] [blame] | 683 | verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK; |
| 684 | if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 685 | return NULL; |
| 686 | return vhdr; |
| 687 | } |
| 688 | |
| 689 | static int nfq_id_after(unsigned int id, unsigned int max) |
| 690 | { |
| 691 | return (int)(id - max) > 0; |
| 692 | } |
| 693 | |
| 694 | static int |
| 695 | nfqnl_recv_verdict_batch(struct sock *ctnl, struct sk_buff *skb, |
| 696 | const struct nlmsghdr *nlh, |
| 697 | const struct nlattr * const nfqa[]) |
| 698 | { |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 699 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 700 | struct nf_queue_entry *entry, *tmp; |
| 701 | unsigned int verdict, maxid; |
| 702 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 703 | struct nfqnl_instance *queue; |
| 704 | LIST_HEAD(batch_list); |
| 705 | u16 queue_num = ntohs(nfmsg->res_id); |
| 706 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 707 | queue = verdict_instance_lookup(queue_num, NETLINK_CB(skb).portid); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 708 | if (IS_ERR(queue)) |
| 709 | return PTR_ERR(queue); |
| 710 | |
| 711 | vhdr = verdicthdr_get(nfqa); |
| 712 | if (!vhdr) |
| 713 | return -EINVAL; |
| 714 | |
| 715 | verdict = ntohl(vhdr->verdict); |
| 716 | maxid = ntohl(vhdr->id); |
| 717 | |
| 718 | spin_lock_bh(&queue->lock); |
| 719 | |
| 720 | list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) { |
| 721 | if (nfq_id_after(entry->id, maxid)) |
| 722 | break; |
| 723 | __dequeue_entry(queue, entry); |
| 724 | list_add_tail(&entry->list, &batch_list); |
| 725 | } |
| 726 | |
| 727 | spin_unlock_bh(&queue->lock); |
| 728 | |
| 729 | if (list_empty(&batch_list)) |
| 730 | return -ENOENT; |
| 731 | |
| 732 | list_for_each_entry_safe(entry, tmp, &batch_list, list) { |
| 733 | if (nfqa[NFQA_MARK]) |
| 734 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
| 735 | nf_reinject(entry, verdict); |
| 736 | } |
| 737 | return 0; |
| 738 | } |
| 739 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 740 | static int |
| 741 | nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 742 | const struct nlmsghdr *nlh, |
| 743 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 744 | { |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 745 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 746 | u_int16_t queue_num = ntohs(nfmsg->res_id); |
| 747 | |
| 748 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 749 | struct nfqnl_instance *queue; |
| 750 | unsigned int verdict; |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 751 | struct nf_queue_entry *entry; |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 752 | enum ip_conntrack_info uninitialized_var(ctinfo); |
| 753 | struct nf_conn *ct = NULL; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 754 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 755 | queue = instance_lookup(queue_num); |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 756 | if (!queue) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 757 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 758 | queue = verdict_instance_lookup(queue_num, NETLINK_CB(skb).portid); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 759 | if (IS_ERR(queue)) |
| 760 | return PTR_ERR(queue); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 761 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 762 | vhdr = verdicthdr_get(nfqa); |
| 763 | if (!vhdr) |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 764 | return -EINVAL; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 765 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 766 | verdict = ntohl(vhdr->verdict); |
| 767 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 768 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 769 | if (entry == NULL) |
| 770 | return -ENOENT; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 771 | |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 772 | rcu_read_lock(); |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 773 | if (nfqa[NFQA_CT] && (queue->flags & NFQA_CFG_F_CONNTRACK)) |
| 774 | ct = nfqnl_ct_parse(entry->skb, nfqa[NFQA_CT], &ctinfo); |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 775 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 776 | if (nfqa[NFQA_PAYLOAD]) { |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 777 | u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]); |
| 778 | int diff = payload_len - entry->skb->len; |
| 779 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 780 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 781 | payload_len, entry, diff) < 0) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 782 | verdict = NF_DROP; |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 783 | |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 784 | if (ct) |
| 785 | nfqnl_ct_seq_adjust(skb, ct, ctinfo, diff); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 786 | } |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 787 | rcu_read_unlock(); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 788 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 789 | if (nfqa[NFQA_MARK]) |
Patrick McHardy | ea3a66f | 2007-12-05 01:30:02 -0800 | [diff] [blame] | 790 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 791 | |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame] | 792 | nf_reinject(entry, verdict); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 793 | return 0; |
| 794 | } |
| 795 | |
| 796 | static int |
| 797 | nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 798 | const struct nlmsghdr *nlh, |
| 799 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 800 | { |
| 801 | return -ENOTSUPP; |
| 802 | } |
| 803 | |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 804 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
| 805 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, |
| 806 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 807 | }; |
| 808 | |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 809 | static const struct nf_queue_handler nfqh = { |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 810 | .outfn = &nfqnl_enqueue_packet, |
| 811 | }; |
| 812 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 813 | static int |
| 814 | nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 815 | const struct nlmsghdr *nlh, |
| 816 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 817 | { |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 818 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 819 | u_int16_t queue_num = ntohs(nfmsg->res_id); |
| 820 | struct nfqnl_instance *queue; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 821 | struct nfqnl_msg_config_cmd *cmd = NULL; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 822 | int ret = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 823 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 824 | if (nfqa[NFQA_CFG_CMD]) { |
| 825 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); |
| 826 | |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 827 | /* Obsolete commands without queue context */ |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 828 | switch (cmd->command) { |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 829 | case NFQNL_CFG_CMD_PF_BIND: return 0; |
| 830 | case NFQNL_CFG_CMD_PF_UNBIND: return 0; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 831 | } |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 832 | } |
| 833 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 834 | rcu_read_lock(); |
| 835 | queue = instance_lookup(queue_num); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 836 | if (queue && queue->peer_portid != NETLINK_CB(skb).portid) { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 837 | ret = -EPERM; |
| 838 | goto err_out_unlock; |
| 839 | } |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 840 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 841 | if (cmd != NULL) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 842 | switch (cmd->command) { |
| 843 | case NFQNL_CFG_CMD_BIND: |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 844 | if (queue) { |
| 845 | ret = -EBUSY; |
| 846 | goto err_out_unlock; |
| 847 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 848 | queue = instance_create(queue_num, NETLINK_CB(skb).portid); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 849 | if (IS_ERR(queue)) { |
| 850 | ret = PTR_ERR(queue); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 851 | goto err_out_unlock; |
| 852 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 853 | break; |
| 854 | case NFQNL_CFG_CMD_UNBIND: |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 855 | if (!queue) { |
| 856 | ret = -ENODEV; |
| 857 | goto err_out_unlock; |
| 858 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 859 | instance_destroy(queue); |
| 860 | break; |
| 861 | case NFQNL_CFG_CMD_PF_BIND: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 862 | case NFQNL_CFG_CMD_PF_UNBIND: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 863 | break; |
| 864 | default: |
Patrick McHardy | cd21f0a | 2007-12-17 22:40:19 -0800 | [diff] [blame] | 865 | ret = -ENOTSUPP; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 866 | break; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 867 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 868 | } |
| 869 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 870 | if (nfqa[NFQA_CFG_PARAMS]) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 871 | struct nfqnl_msg_config_params *params; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 872 | |
Patrick McHardy | 406dbfc | 2006-03-12 20:32:47 -0800 | [diff] [blame] | 873 | if (!queue) { |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 874 | ret = -ENODEV; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 875 | goto err_out_unlock; |
Patrick McHardy | 406dbfc | 2006-03-12 20:32:47 -0800 | [diff] [blame] | 876 | } |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 877 | params = nla_data(nfqa[NFQA_CFG_PARAMS]); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 878 | nfqnl_set_mode(queue, params->copy_mode, |
| 879 | ntohl(params->copy_range)); |
| 880 | } |
| 881 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 882 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
Eric Leblond | 829e17a | 2006-11-29 02:35:33 +0100 | [diff] [blame] | 883 | __be32 *queue_maxlen; |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 884 | |
| 885 | if (!queue) { |
| 886 | ret = -ENODEV; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 887 | goto err_out_unlock; |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 888 | } |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 889 | queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
Eric Leblond | 829e17a | 2006-11-29 02:35:33 +0100 | [diff] [blame] | 890 | spin_lock_bh(&queue->lock); |
| 891 | queue->queue_maxlen = ntohl(*queue_maxlen); |
| 892 | spin_unlock_bh(&queue->lock); |
| 893 | } |
| 894 | |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 895 | if (nfqa[NFQA_CFG_FLAGS]) { |
| 896 | __u32 flags, mask; |
| 897 | |
| 898 | if (!queue) { |
| 899 | ret = -ENODEV; |
| 900 | goto err_out_unlock; |
| 901 | } |
| 902 | |
| 903 | if (!nfqa[NFQA_CFG_MASK]) { |
| 904 | /* A mask is needed to specify which flags are being |
| 905 | * changed. |
| 906 | */ |
| 907 | ret = -EINVAL; |
| 908 | goto err_out_unlock; |
| 909 | } |
| 910 | |
| 911 | flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS])); |
| 912 | mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK])); |
| 913 | |
Krishna Kumar | 46ba5a2 | 2012-06-27 00:59:56 +0000 | [diff] [blame] | 914 | if (flags >= NFQA_CFG_F_MAX) { |
| 915 | ret = -EOPNOTSUPP; |
| 916 | goto err_out_unlock; |
| 917 | } |
| 918 | |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 919 | spin_lock_bh(&queue->lock); |
| 920 | queue->flags &= ~mask; |
| 921 | queue->flags |= flags & mask; |
| 922 | spin_unlock_bh(&queue->lock); |
| 923 | } |
| 924 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 925 | err_out_unlock: |
| 926 | rcu_read_unlock(); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 927 | return ret; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 930 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 931 | [NFQNL_MSG_PACKET] = { .call_rcu = nfqnl_recv_unsupp, |
Harald Welte | 37d2e7a | 2005-11-14 15:24:59 -0800 | [diff] [blame] | 932 | .attr_count = NFQA_MAX, }, |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 933 | [NFQNL_MSG_VERDICT] = { .call_rcu = nfqnl_recv_verdict, |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 934 | .attr_count = NFQA_MAX, |
| 935 | .policy = nfqa_verdict_policy }, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 936 | [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config, |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 937 | .attr_count = NFQA_CFG_MAX, |
| 938 | .policy = nfqa_cfg_policy }, |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 939 | [NFQNL_MSG_VERDICT_BATCH]={ .call_rcu = nfqnl_recv_verdict_batch, |
| 940 | .attr_count = NFQA_MAX, |
| 941 | .policy = nfqa_verdict_batch_policy }, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 942 | }; |
| 943 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 944 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 945 | .name = "nf_queue", |
| 946 | .subsys_id = NFNL_SUBSYS_QUEUE, |
| 947 | .cb_count = NFQNL_MSG_MAX, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 948 | .cb = nfqnl_cb, |
| 949 | }; |
| 950 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 951 | #ifdef CONFIG_PROC_FS |
| 952 | struct iter_state { |
| 953 | unsigned int bucket; |
| 954 | }; |
| 955 | |
| 956 | static struct hlist_node *get_first(struct seq_file *seq) |
| 957 | { |
| 958 | struct iter_state *st = seq->private; |
| 959 | |
| 960 | if (!st) |
| 961 | return NULL; |
| 962 | |
| 963 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
| 964 | if (!hlist_empty(&instance_table[st->bucket])) |
| 965 | return instance_table[st->bucket].first; |
| 966 | } |
| 967 | return NULL; |
| 968 | } |
| 969 | |
| 970 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) |
| 971 | { |
| 972 | struct iter_state *st = seq->private; |
| 973 | |
| 974 | h = h->next; |
| 975 | while (!h) { |
| 976 | if (++st->bucket >= INSTANCE_BUCKETS) |
| 977 | return NULL; |
| 978 | |
| 979 | h = instance_table[st->bucket].first; |
| 980 | } |
| 981 | return h; |
| 982 | } |
| 983 | |
| 984 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) |
| 985 | { |
| 986 | struct hlist_node *head; |
| 987 | head = get_first(seq); |
| 988 | |
| 989 | if (head) |
| 990 | while (pos && (head = get_next(seq, head))) |
| 991 | pos--; |
| 992 | return pos ? NULL : head; |
| 993 | } |
| 994 | |
| 995 | static void *seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | ca7c48c | 2008-01-31 03:53:27 -0800 | [diff] [blame] | 996 | __acquires(instances_lock) |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 997 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 998 | spin_lock(&instances_lock); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 999 | return get_idx(seq, *pos); |
| 1000 | } |
| 1001 | |
| 1002 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 1003 | { |
| 1004 | (*pos)++; |
| 1005 | return get_next(s, v); |
| 1006 | } |
| 1007 | |
| 1008 | static void seq_stop(struct seq_file *s, void *v) |
Eric Dumazet | ca7c48c | 2008-01-31 03:53:27 -0800 | [diff] [blame] | 1009 | __releases(instances_lock) |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1010 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1011 | spin_unlock(&instances_lock); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
| 1014 | static int seq_show(struct seq_file *s, void *v) |
| 1015 | { |
| 1016 | const struct nfqnl_instance *inst = v; |
| 1017 | |
| 1018 | return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n", |
| 1019 | inst->queue_num, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1020 | inst->peer_portid, inst->queue_total, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1021 | inst->copy_mode, inst->copy_range, |
| 1022 | inst->queue_dropped, inst->queue_user_dropped, |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 1023 | inst->id_sequence, 1); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1024 | } |
| 1025 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1026 | static const struct seq_operations nfqnl_seq_ops = { |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1027 | .start = seq_start, |
| 1028 | .next = seq_next, |
| 1029 | .stop = seq_stop, |
| 1030 | .show = seq_show, |
| 1031 | }; |
| 1032 | |
| 1033 | static int nfqnl_open(struct inode *inode, struct file *file) |
| 1034 | { |
Pavel Emelyanov | e2da591 | 2007-10-10 02:29:58 -0700 | [diff] [blame] | 1035 | return seq_open_private(file, &nfqnl_seq_ops, |
| 1036 | sizeof(struct iter_state)); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1037 | } |
| 1038 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 1039 | static const struct file_operations nfqnl_file_ops = { |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1040 | .owner = THIS_MODULE, |
| 1041 | .open = nfqnl_open, |
| 1042 | .read = seq_read, |
| 1043 | .llseek = seq_lseek, |
| 1044 | .release = seq_release_private, |
| 1045 | }; |
| 1046 | |
| 1047 | #endif /* PROC_FS */ |
| 1048 | |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1049 | static int __init nfnetlink_queue_init(void) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1050 | { |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1051 | int i, status = -ENOMEM; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1052 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1053 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
| 1054 | INIT_HLIST_HEAD(&instance_table[i]); |
| 1055 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1056 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
| 1057 | status = nfnetlink_subsys_register(&nfqnl_subsys); |
| 1058 | if (status < 0) { |
| 1059 | printk(KERN_ERR "nf_queue: failed to create netlink socket\n"); |
| 1060 | goto cleanup_netlink_notifier; |
| 1061 | } |
| 1062 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1063 | #ifdef CONFIG_PROC_FS |
Denis V. Lunev | 8eeee8b | 2008-03-27 16:55:53 -0700 | [diff] [blame] | 1064 | if (!proc_create("nfnetlink_queue", 0440, |
| 1065 | proc_net_netfilter, &nfqnl_file_ops)) |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1066 | goto cleanup_subsys; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1067 | #endif |
| 1068 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1069 | register_netdevice_notifier(&nfqnl_dev_notifier); |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 1070 | nf_register_queue_handler(&nfqh); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1071 | return status; |
| 1072 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1073 | #ifdef CONFIG_PROC_FS |
| 1074 | cleanup_subsys: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1075 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1076 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1077 | cleanup_netlink_notifier: |
| 1078 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); |
| 1079 | return status; |
| 1080 | } |
| 1081 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1082 | static void __exit nfnetlink_queue_fini(void) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1083 | { |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 1084 | nf_unregister_queue_handler(); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1085 | unregister_netdevice_notifier(&nfqnl_dev_notifier); |
| 1086 | #ifdef CONFIG_PROC_FS |
| 1087 | remove_proc_entry("nfnetlink_queue", proc_net_netfilter); |
| 1088 | #endif |
| 1089 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
| 1090 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); |
Jesper Dangaard Brouer | 67137f3 | 2009-06-08 03:11:33 +0000 | [diff] [blame] | 1091 | |
| 1092 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
| 1095 | MODULE_DESCRIPTION("netfilter packet queue handler"); |
| 1096 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 1097 | MODULE_LICENSE("GPL"); |
| 1098 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); |
| 1099 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1100 | module_init(nfnetlink_queue_init); |
| 1101 | module_exit(nfnetlink_queue_fini); |