Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 2 | /* |
| 3 | * 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] | 4 | * userspace via nfnetlink. |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 5 | * |
| 6 | * (C) 2005 by Harald Welte <laforge@netfilter.org> |
Patrick McHardy | 4ad9d4f | 2007-12-05 01:31:17 -0800 | [diff] [blame] | 7 | * (C) 2007 by Patrick McHardy <kaber@trash.net> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 8 | * |
| 9 | * Based on the old ipv4-only ip_queue.c: |
| 10 | * (C) 2000-2002 James Morris <jmorris@intercode.com.au> |
| 11 | * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 12 | */ |
Arushi Singhal | 5191d70 | 2018-03-12 18:36:29 +0530 | [diff] [blame] | 13 | |
| 14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 15 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/skbuff.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/spinlock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 21 | #include <linux/notifier.h> |
| 22 | #include <linux/netdevice.h> |
| 23 | #include <linux/netfilter.h> |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 24 | #include <linux/proc_fs.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 25 | #include <linux/netfilter_ipv4.h> |
| 26 | #include <linux/netfilter_ipv6.h> |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 27 | #include <linux/netfilter_bridge.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 28 | #include <linux/netfilter/nfnetlink.h> |
| 29 | #include <linux/netfilter/nfnetlink_queue.h> |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 30 | #include <linux/netfilter/nf_conntrack_common.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 31 | #include <linux/list.h> |
| 32 | #include <net/sock.h> |
David S. Miller | 83111e7 | 2014-01-06 13:36:06 -0500 | [diff] [blame] | 33 | #include <net/tcp_states.h> |
Patrick McHardy | c01cd42 | 2007-12-05 01:24:48 -0800 | [diff] [blame] | 34 | #include <net/netfilter/nf_queue.h> |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 35 | #include <net/netns/generic.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 36 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 37 | #include <linux/atomic.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 38 | |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 39 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 40 | #include "../bridge/br_private.h" |
| 41 | #endif |
| 42 | |
Florian Westphal | 5da773a | 2017-07-26 00:02:34 +0200 | [diff] [blame] | 43 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
| 44 | #include <net/netfilter/nf_conntrack.h> |
| 45 | #endif |
| 46 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 47 | #define NFQNL_QMAX_DEFAULT 1024 |
| 48 | |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 49 | /* We're using struct nlattr which has 16bit nla_len. Note that nla_len |
| 50 | * includes the header length. Thus, the maximum packet length that we |
| 51 | * support is 65531 bytes. We send truncated packets if the specified length |
| 52 | * is larger than that. Userspace can check for presence of NFQA_CAP_LEN |
| 53 | * attribute to detect truncation. |
| 54 | */ |
| 55 | #define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN) |
| 56 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 57 | struct nfqnl_instance { |
| 58 | struct hlist_node hlist; /* global list of queues */ |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 59 | struct rcu_head rcu; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 60 | |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 61 | u32 peer_portid; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 62 | unsigned int queue_maxlen; |
| 63 | unsigned int copy_range; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 64 | unsigned int queue_dropped; |
| 65 | unsigned int queue_user_dropped; |
| 66 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 67 | |
| 68 | u_int16_t queue_num; /* number of this queue */ |
| 69 | u_int8_t copy_mode; |
Krishna Kumar | fdb694a0 | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 70 | u_int32_t flags; /* Set using NFQA_CFG_FLAGS */ |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 71 | /* |
| 72 | * Following fields are dirtied for each queued packet, |
| 73 | * keep them in same cache line if possible. |
| 74 | */ |
Florian Westphal | 886bc50 | 2016-10-31 00:35:07 +0100 | [diff] [blame] | 75 | spinlock_t lock ____cacheline_aligned_in_smp; |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 76 | unsigned int queue_total; |
Eric Dumazet | 5863702a | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 77 | unsigned int id_sequence; /* 'sequence' of pkt ids */ |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 78 | struct list_head queue_list; /* packets in queue */ |
| 79 | }; |
| 80 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 81 | typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 82 | |
Alexey Dobriyan | c7d03a0 | 2016-11-17 04:58:21 +0300 | [diff] [blame] | 83 | static unsigned int nfnl_queue_net_id __read_mostly; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 84 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 85 | #define INSTANCE_BUCKETS 16 |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 86 | struct nfnl_queue_net { |
| 87 | spinlock_t instances_lock; |
| 88 | struct hlist_head instance_table[INSTANCE_BUCKETS]; |
| 89 | }; |
| 90 | |
| 91 | static struct nfnl_queue_net *nfnl_queue_pernet(struct net *net) |
| 92 | { |
| 93 | return net_generic(net, nfnl_queue_net_id); |
| 94 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 95 | |
| 96 | static inline u_int8_t instance_hashfn(u_int16_t queue_num) |
| 97 | { |
Pablo Neira Ayuso | 1cdb090 | 2013-03-14 06:03:17 +0000 | [diff] [blame] | 98 | return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | static struct nfqnl_instance * |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 102 | instance_lookup(struct nfnl_queue_net *q, u_int16_t queue_num) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 103 | { |
| 104 | struct hlist_head *head; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 105 | struct nfqnl_instance *inst; |
| 106 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 107 | head = &q->instance_table[instance_hashfn(queue_num)]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 108 | hlist_for_each_entry_rcu(inst, head, hlist) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 109 | if (inst->queue_num == queue_num) |
| 110 | return inst; |
| 111 | } |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | static struct nfqnl_instance * |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 116 | instance_create(struct nfnl_queue_net *q, u_int16_t queue_num, u32 portid) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 117 | { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 118 | struct nfqnl_instance *inst; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 119 | unsigned int h; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 120 | int err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 121 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 122 | spin_lock(&q->instances_lock); |
| 123 | if (instance_lookup(q, queue_num)) { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 124 | err = -EEXIST; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 125 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 126 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 127 | |
Harald Welte | 10dfdc6 | 2005-11-03 19:20:07 +0100 | [diff] [blame] | 128 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 129 | if (!inst) { |
| 130 | err = -ENOMEM; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 131 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 132 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 133 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 134 | inst->queue_num = queue_num; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 135 | inst->peer_portid = portid; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 136 | inst->queue_maxlen = NFQNL_QMAX_DEFAULT; |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 137 | inst->copy_range = NFQNL_MAX_COPY_RANGE; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 138 | inst->copy_mode = NFQNL_COPY_NONE; |
YOSHIFUJI Hideaki | 181a46a | 2006-01-04 13:56:54 -0800 | [diff] [blame] | 139 | spin_lock_init(&inst->lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 140 | INIT_LIST_HEAD(&inst->queue_list); |
| 141 | |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 142 | if (!try_module_get(THIS_MODULE)) { |
| 143 | err = -EAGAIN; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 144 | goto out_free; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 145 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 146 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 147 | h = instance_hashfn(queue_num); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 148 | hlist_add_head_rcu(&inst->hlist, &q->instance_table[h]); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 149 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 150 | spin_unlock(&q->instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 151 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 152 | return inst; |
| 153 | |
| 154 | out_free: |
| 155 | kfree(inst); |
| 156 | out_unlock: |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 157 | spin_unlock(&q->instances_lock); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 158 | return ERR_PTR(err); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 159 | } |
| 160 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 161 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
| 162 | unsigned long data); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 163 | |
| 164 | static void |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 165 | instance_destroy_rcu(struct rcu_head *head) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 166 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 167 | struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance, |
| 168 | rcu); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 169 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 170 | nfqnl_flush(inst, NULL, 0); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 171 | kfree(inst); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 172 | module_put(THIS_MODULE); |
| 173 | } |
| 174 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 175 | static void |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 176 | __instance_destroy(struct nfqnl_instance *inst) |
| 177 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 178 | hlist_del_rcu(&inst->hlist); |
| 179 | call_rcu(&inst->rcu, instance_destroy_rcu); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 182 | static void |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 183 | instance_destroy(struct nfnl_queue_net *q, struct nfqnl_instance *inst) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 184 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 185 | spin_lock(&q->instances_lock); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 186 | __instance_destroy(inst); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 187 | spin_unlock(&q->instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 188 | } |
| 189 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 190 | static inline void |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 191 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 192 | { |
Patrick McHardy | 0ac41e8 | 2007-12-05 01:25:03 -0800 | [diff] [blame] | 193 | list_add_tail(&entry->list, &queue->queue_list); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 194 | queue->queue_total++; |
| 195 | } |
| 196 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 197 | static void |
| 198 | __dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
| 199 | { |
| 200 | list_del(&entry->list); |
| 201 | queue->queue_total--; |
| 202 | } |
| 203 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 204 | static struct nf_queue_entry * |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 205 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
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 = NULL, *i; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -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 | |
| 211 | list_for_each_entry(i, &queue->queue_list, list) { |
| 212 | if (i->id == id) { |
| 213 | entry = i; |
| 214 | break; |
| 215 | } |
| 216 | } |
| 217 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 218 | if (entry) |
| 219 | __dequeue_entry(queue, entry); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 220 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 221 | spin_unlock_bh(&queue->lock); |
| 222 | |
| 223 | return entry; |
| 224 | } |
| 225 | |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 226 | static void nfqnl_reinject(struct nf_queue_entry *entry, unsigned int verdict) |
| 227 | { |
Florian Westphal | 285c8a7 | 2022-01-07 05:03:24 +0100 | [diff] [blame] | 228 | const struct nf_ct_hook *ct_hook; |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 229 | int err; |
| 230 | |
| 231 | if (verdict == NF_ACCEPT || |
Michal 'vorner' Vaner | ad18d7b | 2018-09-04 13:25:44 +0200 | [diff] [blame] | 232 | verdict == NF_REPEAT || |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 233 | verdict == NF_STOP) { |
| 234 | rcu_read_lock(); |
| 235 | ct_hook = rcu_dereference(nf_ct_hook); |
| 236 | if (ct_hook) { |
| 237 | err = ct_hook->update(entry->state.net, entry->skb); |
| 238 | if (err < 0) |
| 239 | verdict = NF_DROP; |
| 240 | } |
| 241 | rcu_read_unlock(); |
| 242 | } |
| 243 | nf_reinject(entry, verdict); |
| 244 | } |
| 245 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 246 | static void |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 247 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 248 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 249 | struct nf_queue_entry *entry, *next; |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 250 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 251 | spin_lock_bh(&queue->lock); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 252 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
| 253 | if (!cmpfn || cmpfn(entry, data)) { |
| 254 | list_del(&entry->list); |
| 255 | queue->queue_total--; |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 256 | nfqnl_reinject(entry, NF_DROP); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 257 | } |
| 258 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 259 | spin_unlock_bh(&queue->lock); |
| 260 | } |
| 261 | |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 262 | static int |
| 263 | nfqnl_put_packet_info(struct sk_buff *nlskb, struct sk_buff *packet, |
| 264 | bool csum_verify) |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 265 | { |
| 266 | __u32 flags = 0; |
| 267 | |
| 268 | if (packet->ip_summed == CHECKSUM_PARTIAL) |
| 269 | flags = NFQA_SKB_CSUMNOTREADY; |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 270 | else if (csum_verify) |
| 271 | flags = NFQA_SKB_CSUM_NOTVERIFIED; |
| 272 | |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 273 | if (skb_is_gso(packet)) |
| 274 | flags |= NFQA_SKB_GSO; |
| 275 | |
| 276 | return flags ? nla_put_be32(nlskb, NFQA_SKB_INFO, htonl(flags)) : 0; |
| 277 | } |
| 278 | |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 279 | static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk) |
| 280 | { |
| 281 | const struct cred *cred; |
| 282 | |
Eric Dumazet | a839923 | 2015-03-16 21:06:15 -0700 | [diff] [blame] | 283 | if (!sk_fullsock(sk)) |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 284 | return 0; |
| 285 | |
| 286 | read_lock_bh(&sk->sk_callback_lock); |
| 287 | if (sk->sk_socket && sk->sk_socket->file) { |
| 288 | cred = sk->sk_socket->file->f_cred; |
| 289 | if (nla_put_be32(skb, NFQA_UID, |
| 290 | htonl(from_kuid_munged(&init_user_ns, cred->fsuid)))) |
| 291 | goto nla_put_failure; |
| 292 | if (nla_put_be32(skb, NFQA_GID, |
| 293 | htonl(from_kgid_munged(&init_user_ns, cred->fsgid)))) |
| 294 | goto nla_put_failure; |
| 295 | } |
| 296 | read_unlock_bh(&sk->sk_callback_lock); |
| 297 | return 0; |
| 298 | |
| 299 | nla_put_failure: |
| 300 | read_unlock_bh(&sk->sk_callback_lock); |
| 301 | return -1; |
| 302 | } |
| 303 | |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 304 | static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata) |
| 305 | { |
| 306 | u32 seclen = 0; |
| 307 | #if IS_ENABLED(CONFIG_NETWORK_SECMARK) |
| 308 | if (!skb || !sk_fullsock(skb->sk)) |
| 309 | return 0; |
| 310 | |
| 311 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 312 | |
| 313 | if (skb->secmark) |
| 314 | security_secid_to_secctx(skb->secmark, secdata, &seclen); |
| 315 | |
| 316 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 317 | #endif |
| 318 | return seclen; |
| 319 | } |
| 320 | |
Stephane Bryant | 15824ab | 2016-03-26 08:42:11 +0100 | [diff] [blame] | 321 | static u32 nfqnl_get_bridge_size(struct nf_queue_entry *entry) |
| 322 | { |
| 323 | struct sk_buff *entskb = entry->skb; |
| 324 | u32 nlalen = 0; |
| 325 | |
| 326 | if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb)) |
| 327 | return 0; |
| 328 | |
| 329 | if (skb_vlan_tag_present(entskb)) |
| 330 | nlalen += nla_total_size(nla_total_size(sizeof(__be16)) + |
| 331 | nla_total_size(sizeof(__be16))); |
| 332 | |
| 333 | if (entskb->network_header > entskb->mac_header) |
| 334 | nlalen += nla_total_size((entskb->network_header - |
| 335 | entskb->mac_header)); |
| 336 | |
| 337 | return nlalen; |
| 338 | } |
| 339 | |
| 340 | static int nfqnl_put_bridge(struct nf_queue_entry *entry, struct sk_buff *skb) |
| 341 | { |
| 342 | struct sk_buff *entskb = entry->skb; |
| 343 | |
| 344 | if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb)) |
| 345 | return 0; |
| 346 | |
| 347 | if (skb_vlan_tag_present(entskb)) { |
| 348 | struct nlattr *nest; |
| 349 | |
Michal Kubecek | ae0be8d | 2019-04-26 11:13:06 +0200 | [diff] [blame] | 350 | nest = nla_nest_start(skb, NFQA_VLAN); |
Stephane Bryant | 15824ab | 2016-03-26 08:42:11 +0100 | [diff] [blame] | 351 | if (!nest) |
| 352 | goto nla_put_failure; |
| 353 | |
| 354 | if (nla_put_be16(skb, NFQA_VLAN_TCI, htons(entskb->vlan_tci)) || |
| 355 | nla_put_be16(skb, NFQA_VLAN_PROTO, entskb->vlan_proto)) |
| 356 | goto nla_put_failure; |
| 357 | |
| 358 | nla_nest_end(skb, nest); |
| 359 | } |
| 360 | |
| 361 | if (entskb->mac_header < entskb->network_header) { |
| 362 | int len = (int)(entskb->network_header - entskb->mac_header); |
| 363 | |
| 364 | if (nla_put(skb, NFQA_L2HDR, len, skb_mac_header(entskb))) |
| 365 | goto nla_put_failure; |
| 366 | } |
| 367 | |
| 368 | return 0; |
| 369 | |
| 370 | nla_put_failure: |
| 371 | return -1; |
| 372 | } |
| 373 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 374 | static struct sk_buff * |
Gao feng | 7433268 | 2013-09-23 19:20:55 +0800 | [diff] [blame] | 375 | nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, |
Eric Dumazet | 5863702a | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 376 | struct nf_queue_entry *entry, |
| 377 | __be32 **packet_id_ptr) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 378 | { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 379 | size_t size; |
Florian Westphal | c5b0db3 | 2016-02-18 15:03:28 +0100 | [diff] [blame] | 380 | size_t data_len = 0, cap_len = 0; |
Thomas Graf | af2806f | 2013-12-13 15:22:17 +0100 | [diff] [blame] | 381 | unsigned int hlen = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 382 | struct sk_buff *skb; |
Eric Dumazet | 5863702a | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 383 | struct nlattr *nla; |
| 384 | struct nfqnl_msg_packet_hdr *pmsg; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 385 | struct nlmsghdr *nlh; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 386 | struct sk_buff *entskb = entry->skb; |
| 387 | struct net_device *indev; |
| 388 | struct net_device *outdev; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 389 | struct nf_conn *ct = NULL; |
Florian Westphal | b43c279 | 2021-11-26 13:04:03 +0100 | [diff] [blame] | 390 | enum ip_conntrack_info ctinfo = 0; |
Florian Westphal | 285c8a7 | 2022-01-07 05:03:24 +0100 | [diff] [blame] | 391 | const struct nfnl_ct_hook *nfnl_ct; |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 392 | bool csum_verify; |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 393 | char *secdata = NULL; |
| 394 | u32 seclen = 0; |
Martin KaFai Lau | 80fcec6 | 2022-03-02 11:56:15 -0800 | [diff] [blame] | 395 | ktime_t tstamp; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 396 | |
yangxingwu | 7e59b3fe | 2019-07-16 10:13:01 +0800 | [diff] [blame] | 397 | size = nlmsg_total_size(sizeof(struct nfgenmsg)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 398 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) |
| 399 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 400 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 401 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 402 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 403 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 404 | #endif |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 405 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
Nicolas Dichtel | 8b54136 | 2022-01-17 21:56:13 +0100 | [diff] [blame] | 406 | + nla_total_size(sizeof(u_int32_t)) /* priority */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 407 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 408 | + nla_total_size(sizeof(u_int32_t)) /* skbinfo */ |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 409 | + nla_total_size(sizeof(u_int32_t)); /* cap_len */ |
| 410 | |
Martin KaFai Lau | 80fcec6 | 2022-03-02 11:56:15 -0800 | [diff] [blame] | 411 | tstamp = skb_tstamp_cond(entskb, false); |
| 412 | if (tstamp) |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 413 | size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 414 | |
Stephane Bryant | 15824ab | 2016-03-26 08:42:11 +0100 | [diff] [blame] | 415 | size += nfqnl_get_bridge_size(entry); |
| 416 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 417 | if (entry->state.hook <= NF_INET_FORWARD || |
| 418 | (entry->state.hook == NF_INET_POST_ROUTING && entskb->sk == NULL)) |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 419 | csum_verify = !skb_csum_unnecessary(entskb); |
| 420 | else |
| 421 | csum_verify = false; |
| 422 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 423 | outdev = entry->state.out; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 424 | |
Mark Rutland | 14cd5d4 | 2017-10-23 14:07:17 -0700 | [diff] [blame] | 425 | switch ((enum nfqnl_config_mode)READ_ONCE(queue->copy_mode)) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 426 | case NFQNL_COPY_META: |
| 427 | case NFQNL_COPY_NONE: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 428 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 429 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 430 | case NFQNL_COPY_PACKET: |
Florian Westphal | 00bd1cc | 2013-04-19 04:58:27 +0000 | [diff] [blame] | 431 | if (!(queue->flags & NFQA_CFG_F_GSO) && |
| 432 | entskb->ip_summed == CHECKSUM_PARTIAL && |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 433 | skb_checksum_help(entskb)) |
Patrick McHardy | e7dfb09 | 2005-09-06 15:10:00 -0700 | [diff] [blame] | 434 | return NULL; |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 435 | |
Mark Rutland | 14cd5d4 | 2017-10-23 14:07:17 -0700 | [diff] [blame] | 436 | data_len = READ_ONCE(queue->copy_range); |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 437 | if (data_len > entskb->len) |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 438 | data_len = entskb->len; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 439 | |
Thomas Graf | af2806f | 2013-12-13 15:22:17 +0100 | [diff] [blame] | 440 | hlen = skb_zerocopy_headlen(entskb); |
| 441 | hlen = min_t(unsigned int, hlen, data_len); |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 442 | size += sizeof(struct nlattr) + hlen; |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 443 | cap_len = entskb->len; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 444 | break; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 445 | } |
| 446 | |
Arnd Bergmann | 8e66216 | 2015-11-19 13:49:59 +0100 | [diff] [blame] | 447 | nfnl_ct = rcu_dereference(nfnl_ct_hook); |
| 448 | |
Florian Westphal | 83ace77 | 2021-01-20 16:30:03 +0100 | [diff] [blame] | 449 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 450 | if (queue->flags & NFQA_CFG_F_CONNTRACK) { |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 451 | if (nfnl_ct != NULL) { |
Florian Westphal | 83ace77 | 2021-01-20 16:30:03 +0100 | [diff] [blame] | 452 | ct = nf_ct_get(entskb, &ctinfo); |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 453 | if (ct != NULL) |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 454 | size += nfnl_ct->build_size(ct); |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 455 | } |
| 456 | } |
Florian Westphal | 83ace77 | 2021-01-20 16:30:03 +0100 | [diff] [blame] | 457 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 458 | |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 459 | if (queue->flags & NFQA_CFG_F_UID_GID) { |
yangxingwu | 7e59b3fe | 2019-07-16 10:13:01 +0800 | [diff] [blame] | 460 | size += (nla_total_size(sizeof(u_int32_t)) /* uid */ |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 461 | + nla_total_size(sizeof(u_int32_t))); /* gid */ |
| 462 | } |
| 463 | |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 464 | if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) { |
| 465 | seclen = nfqnl_get_sk_secctx(entskb, &secdata); |
| 466 | if (seclen) |
| 467 | size += nla_total_size(seclen); |
| 468 | } |
| 469 | |
Florian Westphal | c5b0db3 | 2016-02-18 15:03:28 +0100 | [diff] [blame] | 470 | skb = alloc_skb(size, GFP_ATOMIC); |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 471 | if (!skb) { |
| 472 | skb_tx_error(entskb); |
Liping Zhang | 77c1c03 | 2017-03-28 22:59:25 +0800 | [diff] [blame] | 473 | goto nlmsg_failure; |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 474 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 475 | |
Pablo Neira Ayuso | 19c28b1 | 2021-03-30 16:58:37 +0200 | [diff] [blame] | 476 | nlh = nfnl_msg_put(skb, 0, 0, |
| 477 | nfnl_msg_type(NFNL_SUBSYS_QUEUE, NFQNL_MSG_PACKET), |
| 478 | 0, entry->state.pf, NFNETLINK_V0, |
| 479 | htons(queue->queue_num)); |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 480 | if (!nlh) { |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 481 | skb_tx_error(entskb); |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 482 | kfree_skb(skb); |
Liping Zhang | 77c1c03 | 2017-03-28 22:59:25 +0800 | [diff] [blame] | 483 | goto nlmsg_failure; |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 484 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 485 | |
Eric Dumazet | 5863702a | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 486 | nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg)); |
| 487 | pmsg = nla_data(nla); |
| 488 | pmsg->hw_protocol = entskb->protocol; |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 489 | pmsg->hook = entry->state.hook; |
Eric Dumazet | 5863702a | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 490 | *packet_id_ptr = &pmsg->packet_id; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 491 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 492 | indev = entry->state.in; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 493 | if (indev) { |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 494 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 495 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex))) |
| 496 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 497 | #else |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 498 | if (entry->state.pf == PF_BRIDGE) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 499 | /* Case 1: indev is physical input device, we need to |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 500 | * look for bridge group (when called from |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 501 | * netfilter_bridge) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 502 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
| 503 | htonl(indev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 504 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 505 | /* rcu_read_lock()ed by __nf_queue */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 506 | nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
| 507 | htonl(br_port_get_rcu(indev)->br->dev->ifindex))) |
| 508 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 509 | } else { |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 510 | int physinif; |
| 511 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 512 | /* Case 2: indev is bridge group, we need to look for |
| 513 | * physical device (when called from ipv4) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 514 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
| 515 | htonl(indev->ifindex))) |
| 516 | goto nla_put_failure; |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 517 | |
| 518 | physinif = nf_bridge_get_physinif(entskb); |
| 519 | if (physinif && |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 520 | nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 521 | htonl(physinif))) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 522 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 523 | } |
| 524 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 525 | } |
| 526 | |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 527 | if (outdev) { |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 528 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 529 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex))) |
| 530 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 531 | #else |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 532 | if (entry->state.pf == PF_BRIDGE) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 533 | /* Case 1: outdev is physical output device, we need to |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 534 | * look for bridge group (when called from |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 535 | * netfilter_bridge) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 536 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
| 537 | htonl(outdev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 538 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 539 | /* rcu_read_lock()ed by __nf_queue */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 540 | nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
| 541 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) |
| 542 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 543 | } else { |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 544 | int physoutif; |
| 545 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 546 | /* Case 2: outdev is bridge group, we need to look for |
| 547 | * physical output device (when called from ipv4) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 548 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
| 549 | htonl(outdev->ifindex))) |
| 550 | goto nla_put_failure; |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 551 | |
| 552 | physoutif = nf_bridge_get_physoutif(entskb); |
| 553 | if (physoutif && |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 554 | nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 555 | htonl(physoutif))) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 556 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 557 | } |
| 558 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 559 | } |
| 560 | |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 561 | if (entskb->mark && |
| 562 | nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark))) |
| 563 | goto nla_put_failure; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 564 | |
Nicolas Dichtel | 8b54136 | 2022-01-17 21:56:13 +0100 | [diff] [blame] | 565 | if (entskb->priority && |
| 566 | nla_put_be32(skb, NFQA_PRIORITY, htonl(entskb->priority))) |
| 567 | goto nla_put_failure; |
| 568 | |
Nicolas Cavallari | 2c38de4 | 2011-06-16 17:27:04 +0200 | [diff] [blame] | 569 | if (indev && entskb->dev && |
Ignacy Gawędzki | ebb966d | 2021-12-10 16:31:27 +0100 | [diff] [blame] | 570 | skb_mac_header_was_set(entskb) && |
| 571 | skb_mac_header_len(entskb) != 0) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 572 | struct nfqnl_msg_packet_hw phw; |
Dan Carpenter | e4d091d | 2013-08-01 12:36:57 +0300 | [diff] [blame] | 573 | int len; |
| 574 | |
| 575 | memset(&phw, 0, sizeof(phw)); |
| 576 | len = dev_parse_header(entskb, phw.hw_addr); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 577 | if (len) { |
| 578 | phw.hw_addrlen = htons(len); |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 579 | if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw)) |
| 580 | goto nla_put_failure; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 581 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 582 | } |
| 583 | |
Stephane Bryant | 15824ab | 2016-03-26 08:42:11 +0100 | [diff] [blame] | 584 | if (nfqnl_put_bridge(entry, skb) < 0) |
| 585 | goto nla_put_failure; |
| 586 | |
Martin KaFai Lau | 80fcec6 | 2022-03-02 11:56:15 -0800 | [diff] [blame] | 587 | if (entry->state.hook <= NF_INET_FORWARD && tstamp) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 588 | struct nfqnl_msg_packet_timestamp ts; |
Martin KaFai Lau | 80fcec6 | 2022-03-02 11:56:15 -0800 | [diff] [blame] | 589 | struct timespec64 kts = ktime_to_timespec64(tstamp); |
Pablo Neira Ayuso | b28b1e8 | 2015-10-04 19:38:14 +0200 | [diff] [blame] | 590 | |
| 591 | ts.sec = cpu_to_be64(kts.tv_sec); |
| 592 | ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 593 | |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 594 | if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts)) |
| 595 | goto nla_put_failure; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 596 | } |
| 597 | |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 598 | if ((queue->flags & NFQA_CFG_F_UID_GID) && entskb->sk && |
| 599 | nfqnl_put_sk_uidgid(skb, entskb->sk) < 0) |
| 600 | goto nla_put_failure; |
| 601 | |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 602 | if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata)) |
| 603 | goto nla_put_failure; |
| 604 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 605 | if (ct && nfnl_ct->build(skb, ct, ctinfo, NFQA_CT, NFQA_CT_INFO) < 0) |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 606 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 607 | |
Florian Westphal | 7f87712 | 2013-06-04 22:22:16 +0000 | [diff] [blame] | 608 | if (cap_len > data_len && |
| 609 | nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 610 | goto nla_put_failure; |
| 611 | |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 612 | if (nfqnl_put_packet_info(skb, entskb, csum_verify)) |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 613 | goto nla_put_failure; |
| 614 | |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 615 | if (data_len) { |
| 616 | struct nlattr *nla; |
| 617 | |
| 618 | if (skb_tailroom(skb) < sizeof(*nla) + hlen) |
| 619 | goto nla_put_failure; |
| 620 | |
Johannes Berg | 4df864c | 2017-06-16 14:29:21 +0200 | [diff] [blame] | 621 | nla = skb_put(skb, sizeof(*nla)); |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 622 | nla->nla_type = NFQA_PAYLOAD; |
| 623 | nla->nla_len = nla_attr_size(data_len); |
| 624 | |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 625 | if (skb_zerocopy(skb, entskb, data_len, hlen)) |
| 626 | goto nla_put_failure; |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 627 | } |
| 628 | |
| 629 | nlh->nlmsg_len = skb->len; |
Liping Zhang | 77c1c03 | 2017-03-28 22:59:25 +0800 | [diff] [blame] | 630 | if (seclen) |
| 631 | security_release_secctx(secdata, seclen); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 632 | return skb; |
| 633 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 634 | nla_put_failure: |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 635 | skb_tx_error(entskb); |
Wei Yongjun | a672995 | 2012-08-28 03:14:15 +0000 | [diff] [blame] | 636 | kfree_skb(skb); |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 637 | net_err_ratelimited("nf_queue: error creating packet message\n"); |
Liping Zhang | 77c1c03 | 2017-03-28 22:59:25 +0800 | [diff] [blame] | 638 | nlmsg_failure: |
| 639 | if (seclen) |
| 640 | security_release_secctx(secdata, seclen); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 641 | return NULL; |
| 642 | } |
| 643 | |
Florian Westphal | 5da773a | 2017-07-26 00:02:34 +0200 | [diff] [blame] | 644 | static bool nf_ct_drop_unconfirmed(const struct nf_queue_entry *entry) |
| 645 | { |
| 646 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
| 647 | static const unsigned long flags = IPS_CONFIRMED | IPS_DYING; |
| 648 | const struct nf_conn *ct = (void *)skb_nfct(entry->skb); |
| 649 | |
| 650 | if (ct && ((ct->status & flags) == IPS_DYING)) |
| 651 | return true; |
| 652 | #endif |
| 653 | return false; |
| 654 | } |
| 655 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 656 | static int |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 657 | __nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue, |
| 658 | struct nf_queue_entry *entry) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 659 | { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 660 | struct sk_buff *nskb; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 661 | int err = -ENOBUFS; |
Eric Dumazet | 5863702a | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 662 | __be32 *packet_id_ptr; |
Krishna Kumar | fdb694a0 | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 663 | int failopen = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 664 | |
Gao feng | 7433268 | 2013-09-23 19:20:55 +0800 | [diff] [blame] | 665 | nskb = nfqnl_build_packet_message(net, queue, entry, &packet_id_ptr); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 666 | if (nskb == NULL) { |
| 667 | err = -ENOMEM; |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 668 | goto err_out; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 669 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 670 | spin_lock_bh(&queue->lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 671 | |
Florian Westphal | 5da773a | 2017-07-26 00:02:34 +0200 | [diff] [blame] | 672 | if (nf_ct_drop_unconfirmed(entry)) |
| 673 | goto err_out_free_nskb; |
| 674 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 675 | if (queue->queue_total >= queue->queue_maxlen) { |
Krishna Kumar | fdb694a0 | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 676 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
| 677 | failopen = 1; |
| 678 | err = 0; |
| 679 | } else { |
| 680 | queue->queue_dropped++; |
| 681 | net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n", |
| 682 | queue->queue_total); |
| 683 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 684 | goto err_out_free_nskb; |
| 685 | } |
Eric Dumazet | 5863702a | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 686 | entry->id = ++queue->id_sequence; |
| 687 | *packet_id_ptr = htonl(entry->id); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 688 | |
| 689 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ |
Pablo Neira Ayuso | ee92118 | 2020-08-23 13:55:36 +0200 | [diff] [blame] | 690 | err = nfnetlink_unicast(nskb, net, queue->peer_portid); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 691 | if (err < 0) { |
Pablo Neira Ayuso | 9314011 | 2016-03-23 12:58:01 +0100 | [diff] [blame] | 692 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
| 693 | failopen = 1; |
| 694 | err = 0; |
| 695 | } else { |
| 696 | queue->queue_user_dropped++; |
| 697 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 698 | goto err_out_unlock; |
| 699 | } |
| 700 | |
| 701 | __enqueue_entry(queue, entry); |
| 702 | |
| 703 | spin_unlock_bh(&queue->lock); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 704 | return 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 705 | |
| 706 | err_out_free_nskb: |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 707 | kfree_skb(nskb); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 708 | err_out_unlock: |
| 709 | spin_unlock_bh(&queue->lock); |
Krishna Kumar | fdb694a0 | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 710 | if (failopen) |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 711 | nfqnl_reinject(entry, NF_ACCEPT); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 712 | err_out: |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 713 | return err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 714 | } |
| 715 | |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 716 | static struct nf_queue_entry * |
| 717 | nf_queue_entry_dup(struct nf_queue_entry *e) |
| 718 | { |
| 719 | struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC); |
Florian Westphal | c387307 | 2022-02-28 06:22:22 +0100 | [diff] [blame] | 720 | |
| 721 | if (!entry) |
| 722 | return NULL; |
| 723 | |
| 724 | if (nf_queue_entry_get_refs(entry)) |
| 725 | return entry; |
| 726 | |
| 727 | kfree(entry); |
| 728 | return NULL; |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 729 | } |
| 730 | |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 731 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 732 | /* When called from bridge netfilter, skb->data must point to MAC header |
| 733 | * before calling skb_gso_segment(). Else, original MAC header is lost |
| 734 | * and segmented skbs will be sent to wrong destination. |
| 735 | */ |
| 736 | static void nf_bridge_adjust_skb_data(struct sk_buff *skb) |
| 737 | { |
Florian Westphal | c4b0e77 | 2018-12-18 17:15:15 +0100 | [diff] [blame] | 738 | if (nf_bridge_info_get(skb)) |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 739 | __skb_push(skb, skb->network_header - skb->mac_header); |
| 740 | } |
| 741 | |
| 742 | static void nf_bridge_adjust_segmented_data(struct sk_buff *skb) |
| 743 | { |
Florian Westphal | c4b0e77 | 2018-12-18 17:15:15 +0100 | [diff] [blame] | 744 | if (nf_bridge_info_get(skb)) |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 745 | __skb_pull(skb, skb->network_header - skb->mac_header); |
| 746 | } |
| 747 | #else |
| 748 | #define nf_bridge_adjust_skb_data(s) do {} while (0) |
| 749 | #define nf_bridge_adjust_segmented_data(s) do {} while (0) |
| 750 | #endif |
| 751 | |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 752 | static int |
| 753 | __nfqnl_enqueue_packet_gso(struct net *net, struct nfqnl_instance *queue, |
| 754 | struct sk_buff *skb, struct nf_queue_entry *entry) |
| 755 | { |
| 756 | int ret = -ENOMEM; |
| 757 | struct nf_queue_entry *entry_seg; |
| 758 | |
| 759 | nf_bridge_adjust_segmented_data(skb); |
| 760 | |
| 761 | if (skb->next == NULL) { /* last packet, no need to copy entry */ |
| 762 | struct sk_buff *gso_skb = entry->skb; |
| 763 | entry->skb = skb; |
| 764 | ret = __nfqnl_enqueue_packet(net, queue, entry); |
| 765 | if (ret) |
| 766 | entry->skb = gso_skb; |
| 767 | return ret; |
| 768 | } |
| 769 | |
David S. Miller | a8305bf | 2018-07-29 20:42:53 -0700 | [diff] [blame] | 770 | skb_mark_not_on_list(skb); |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 771 | |
| 772 | entry_seg = nf_queue_entry_dup(entry); |
| 773 | if (entry_seg) { |
| 774 | entry_seg->skb = skb; |
| 775 | ret = __nfqnl_enqueue_packet(net, queue, entry_seg); |
| 776 | if (ret) |
Florian Westphal | dd3cc11 | 2020-03-27 03:24:46 +0100 | [diff] [blame] | 777 | nf_queue_entry_free(entry_seg); |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 778 | } |
| 779 | return ret; |
| 780 | } |
| 781 | |
| 782 | static int |
| 783 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) |
| 784 | { |
| 785 | unsigned int queued; |
| 786 | struct nfqnl_instance *queue; |
Jason A. Donenfeld | 2670ee7 | 2020-01-13 18:42:32 -0500 | [diff] [blame] | 787 | struct sk_buff *skb, *segs, *nskb; |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 788 | int err = -ENOBUFS; |
Eric W. Biederman | 9dff2c9 | 2015-09-15 20:04:17 -0500 | [diff] [blame] | 789 | struct net *net = entry->state.net; |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 790 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
| 791 | |
Aaron Conole | e2361cb | 2016-09-21 11:35:04 -0400 | [diff] [blame] | 792 | /* rcu_read_lock()ed by nf_hook_thresh */ |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 793 | queue = instance_lookup(q, queuenum); |
| 794 | if (!queue) |
| 795 | return -ESRCH; |
| 796 | |
| 797 | if (queue->copy_mode == NFQNL_COPY_NONE) |
| 798 | return -EINVAL; |
| 799 | |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 800 | skb = entry->skb; |
| 801 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 802 | switch (entry->state.pf) { |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 803 | case NFPROTO_IPV4: |
| 804 | skb->protocol = htons(ETH_P_IP); |
| 805 | break; |
| 806 | case NFPROTO_IPV6: |
| 807 | skb->protocol = htons(ETH_P_IPV6); |
| 808 | break; |
| 809 | } |
| 810 | |
Pablo Neira Ayuso | 7b8dfe2 | 2013-06-07 18:42:00 +0200 | [diff] [blame] | 811 | if ((queue->flags & NFQA_CFG_F_GSO) || !skb_is_gso(skb)) |
| 812 | return __nfqnl_enqueue_packet(net, queue, entry); |
| 813 | |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 814 | nf_bridge_adjust_skb_data(skb); |
| 815 | segs = skb_gso_segment(skb, 0); |
| 816 | /* Does not use PTR_ERR to limit the number of error codes that can be |
Florian Westphal | ed78d09 | 2015-10-13 14:33:27 +0200 | [diff] [blame] | 817 | * returned by nf_queue. For instance, callers rely on -ESRCH to |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 818 | * mean 'ignore this hook'. |
| 819 | */ |
Florian Westphal | 330966e | 2014-10-20 13:49:17 +0200 | [diff] [blame] | 820 | if (IS_ERR_OR_NULL(segs)) |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 821 | goto out_err; |
| 822 | queued = 0; |
| 823 | err = 0; |
Jason A. Donenfeld | 2670ee7 | 2020-01-13 18:42:32 -0500 | [diff] [blame] | 824 | skb_list_walk_safe(segs, segs, nskb) { |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 825 | if (err == 0) |
| 826 | err = __nfqnl_enqueue_packet_gso(net, queue, |
| 827 | segs, entry); |
| 828 | if (err == 0) |
| 829 | queued++; |
| 830 | else |
| 831 | kfree_skb(segs); |
Jason A. Donenfeld | 2670ee7 | 2020-01-13 18:42:32 -0500 | [diff] [blame] | 832 | } |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 833 | |
| 834 | if (queued) { |
| 835 | if (err) /* some segments are already queued */ |
Florian Westphal | dd3cc11 | 2020-03-27 03:24:46 +0100 | [diff] [blame] | 836 | nf_queue_entry_free(entry); |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 837 | kfree_skb(skb); |
| 838 | return 0; |
| 839 | } |
| 840 | out_err: |
| 841 | nf_bridge_adjust_segmented_data(skb); |
| 842 | return err; |
| 843 | } |
| 844 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 845 | static int |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 846 | 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] | 847 | { |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 848 | struct sk_buff *nskb; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 849 | |
Patrick McHardy | d8a585d | 2006-11-14 19:48:09 -0800 | [diff] [blame] | 850 | if (diff < 0) { |
| 851 | if (pskb_trim(e->skb, data_len)) |
| 852 | return -ENOMEM; |
| 853 | } else if (diff > 0) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 854 | if (data_len > 0xFFFF) |
| 855 | return -EINVAL; |
| 856 | if (diff > skb_tailroom(e->skb)) { |
Arnaud Ebalard | 9a732ed | 2008-04-29 03:16:34 -0700 | [diff] [blame] | 857 | nskb = skb_copy_expand(e->skb, skb_headroom(e->skb), |
| 858 | diff, GFP_ATOMIC); |
Arushi Singhal | 5191d70 | 2018-03-12 18:36:29 +0530 | [diff] [blame] | 859 | if (!nskb) |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 860 | return -ENOMEM; |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 861 | kfree_skb(e->skb); |
| 862 | e->skb = nskb; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 863 | } |
| 864 | skb_put(e->skb, diff); |
| 865 | } |
Florian Westphal | 2cf6bff | 2019-05-23 15:44:12 +0200 | [diff] [blame] | 866 | if (skb_ensure_writable(e->skb, data_len)) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 867 | return -ENOMEM; |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 868 | skb_copy_to_linear_data(e->skb, data, data_len); |
Patrick McHardy | e7dfb09 | 2005-09-06 15:10:00 -0700 | [diff] [blame] | 869 | e->skb->ip_summed = CHECKSUM_NONE; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 870 | return 0; |
| 871 | } |
| 872 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 873 | static int |
| 874 | nfqnl_set_mode(struct nfqnl_instance *queue, |
| 875 | unsigned char mode, unsigned int range) |
| 876 | { |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 877 | int status = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 878 | |
| 879 | spin_lock_bh(&queue->lock); |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 880 | switch (mode) { |
| 881 | case NFQNL_COPY_NONE: |
| 882 | case NFQNL_COPY_META: |
| 883 | queue->copy_mode = mode; |
| 884 | queue->copy_range = 0; |
| 885 | break; |
| 886 | |
| 887 | case NFQNL_COPY_PACKET: |
| 888 | queue->copy_mode = mode; |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 889 | if (range == 0 || range > NFQNL_MAX_COPY_RANGE) |
| 890 | queue->copy_range = NFQNL_MAX_COPY_RANGE; |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 891 | else |
| 892 | queue->copy_range = range; |
| 893 | break; |
| 894 | |
| 895 | default: |
| 896 | status = -EINVAL; |
| 897 | |
| 898 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 899 | spin_unlock_bh(&queue->lock); |
| 900 | |
| 901 | return status; |
| 902 | } |
| 903 | |
| 904 | static int |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 905 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 906 | { |
Florian Westphal | c4b0e77 | 2018-12-18 17:15:15 +0100 | [diff] [blame] | 907 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
| 908 | int physinif, physoutif; |
| 909 | |
| 910 | physinif = nf_bridge_get_physinif(entry->skb); |
| 911 | physoutif = nf_bridge_get_physoutif(entry->skb); |
| 912 | |
| 913 | if (physinif == ifindex || physoutif == ifindex) |
| 914 | return 1; |
| 915 | #endif |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 916 | if (entry->state.in) |
| 917 | if (entry->state.in->ifindex == ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 918 | return 1; |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 919 | if (entry->state.out) |
| 920 | if (entry->state.out->ifindex == ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 921 | return 1; |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 922 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 923 | return 0; |
| 924 | } |
| 925 | |
| 926 | /* drop all packets with either indev or outdev == ifindex from all queue |
| 927 | * instances */ |
| 928 | static void |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 929 | nfqnl_dev_drop(struct net *net, int ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 930 | { |
| 931 | int i; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 932 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 933 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 934 | rcu_read_lock(); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 935 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 936 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 937 | struct nfqnl_instance *inst; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 938 | struct hlist_head *head = &q->instance_table[i]; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 939 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 940 | hlist_for_each_entry_rcu(inst, head, hlist) |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 941 | nfqnl_flush(inst, dev_cmp, ifindex); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 942 | } |
| 943 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 944 | rcu_read_unlock(); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 945 | } |
| 946 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 947 | static int |
| 948 | nfqnl_rcv_dev_event(struct notifier_block *this, |
| 949 | unsigned long event, void *ptr) |
| 950 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 951 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 952 | |
| 953 | /* Drop any packets associated with the downed device */ |
| 954 | if (event == NETDEV_DOWN) |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 955 | nfqnl_dev_drop(dev_net(dev), dev->ifindex); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 956 | return NOTIFY_DONE; |
| 957 | } |
| 958 | |
| 959 | static struct notifier_block nfqnl_dev_notifier = { |
| 960 | .notifier_call = nfqnl_rcv_dev_event, |
| 961 | }; |
| 962 | |
Florian Westphal | 26888df | 2017-12-01 00:21:03 +0100 | [diff] [blame] | 963 | static void nfqnl_nf_hook_drop(struct net *net) |
Eric W. Biederman | 8405a8f | 2015-06-19 14:03:39 -0500 | [diff] [blame] | 964 | { |
| 965 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
| 966 | int i; |
| 967 | |
Florian Westphal | 8702997 | 2021-08-05 12:02:43 +0200 | [diff] [blame] | 968 | /* This function is also called on net namespace error unwind, |
| 969 | * when pernet_ops->init() failed and ->exit() functions of the |
| 970 | * previous pernet_ops gets called. |
| 971 | * |
| 972 | * This may result in a call to nfqnl_nf_hook_drop() before |
| 973 | * struct nfnl_queue_net was allocated. |
| 974 | */ |
| 975 | if (!q) |
| 976 | return; |
| 977 | |
Eric W. Biederman | 8405a8f | 2015-06-19 14:03:39 -0500 | [diff] [blame] | 978 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
| 979 | struct nfqnl_instance *inst; |
| 980 | struct hlist_head *head = &q->instance_table[i]; |
| 981 | |
Florian Westphal | 26888df | 2017-12-01 00:21:03 +0100 | [diff] [blame] | 982 | hlist_for_each_entry_rcu(inst, head, hlist) |
Florian Westphal | 039b40e | 2017-04-24 15:37:41 +0200 | [diff] [blame] | 983 | nfqnl_flush(inst, NULL, 0); |
Eric W. Biederman | 8405a8f | 2015-06-19 14:03:39 -0500 | [diff] [blame] | 984 | } |
Eric W. Biederman | 8405a8f | 2015-06-19 14:03:39 -0500 | [diff] [blame] | 985 | } |
| 986 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 987 | static int |
| 988 | nfqnl_rcv_nl_event(struct notifier_block *this, |
| 989 | unsigned long event, void *ptr) |
| 990 | { |
| 991 | struct netlink_notify *n = ptr; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 992 | struct nfnl_queue_net *q = nfnl_queue_pernet(n->net); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 993 | |
Patrick McHardy | dee5817 | 2009-11-06 17:04:00 +0100 | [diff] [blame] | 994 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 995 | int i; |
| 996 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 997 | /* destroy all instances for this portid */ |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 998 | spin_lock(&q->instances_lock); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 999 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1000 | struct hlist_node *t2; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1001 | struct nfqnl_instance *inst; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1002 | struct hlist_head *head = &q->instance_table[i]; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1003 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1004 | hlist_for_each_entry_safe(inst, t2, head, hlist) { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1005 | if (n->portid == inst->peer_portid) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1006 | __instance_destroy(inst); |
| 1007 | } |
| 1008 | } |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1009 | spin_unlock(&q->instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1010 | } |
| 1011 | return NOTIFY_DONE; |
| 1012 | } |
| 1013 | |
| 1014 | static struct notifier_block nfqnl_rtnl_notifier = { |
| 1015 | .notifier_call = nfqnl_rcv_nl_event, |
| 1016 | }; |
| 1017 | |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1018 | static const struct nla_policy nfqa_vlan_policy[NFQA_VLAN_MAX + 1] = { |
| 1019 | [NFQA_VLAN_TCI] = { .type = NLA_U16}, |
| 1020 | [NFQA_VLAN_PROTO] = { .type = NLA_U16}, |
| 1021 | }; |
| 1022 | |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 1023 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
| 1024 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, |
| 1025 | [NFQA_MARK] = { .type = NLA_U32 }, |
| 1026 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 1027 | [NFQA_CT] = { .type = NLA_UNSPEC }, |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 1028 | [NFQA_EXP] = { .type = NLA_UNSPEC }, |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1029 | [NFQA_VLAN] = { .type = NLA_NESTED }, |
Nicolas Dichtel | 98eee88 | 2022-02-04 11:21:43 +0100 | [diff] [blame] | 1030 | [NFQA_PRIORITY] = { .type = NLA_U32 }, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1031 | }; |
| 1032 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1033 | static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = { |
| 1034 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, |
| 1035 | [NFQA_MARK] = { .type = NLA_U32 }, |
Nicolas Dichtel | 98eee88 | 2022-02-04 11:21:43 +0100 | [diff] [blame] | 1036 | [NFQA_PRIORITY] = { .type = NLA_U32 }, |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1037 | }; |
| 1038 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1039 | static struct nfqnl_instance * |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 1040 | verdict_instance_lookup(struct nfnl_queue_net *q, u16 queue_num, u32 nlportid) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1041 | { |
| 1042 | struct nfqnl_instance *queue; |
| 1043 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1044 | queue = instance_lookup(q, queue_num); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1045 | if (!queue) |
| 1046 | return ERR_PTR(-ENODEV); |
| 1047 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1048 | if (queue->peer_portid != nlportid) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1049 | return ERR_PTR(-EPERM); |
| 1050 | |
| 1051 | return queue; |
| 1052 | } |
| 1053 | |
| 1054 | static struct nfqnl_msg_verdict_hdr* |
| 1055 | verdicthdr_get(const struct nlattr * const nfqa[]) |
| 1056 | { |
| 1057 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 1058 | unsigned int verdict; |
| 1059 | |
| 1060 | if (!nfqa[NFQA_VERDICT_HDR]) |
| 1061 | return NULL; |
| 1062 | |
| 1063 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); |
Florian Westphal | c667523 | 2011-08-30 15:01:20 +0200 | [diff] [blame] | 1064 | verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK; |
| 1065 | if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1066 | return NULL; |
| 1067 | return vhdr; |
| 1068 | } |
| 1069 | |
| 1070 | static int nfq_id_after(unsigned int id, unsigned int max) |
| 1071 | { |
| 1072 | return (int)(id - max) > 0; |
| 1073 | } |
| 1074 | |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1075 | static int nfqnl_recv_verdict_batch(struct sk_buff *skb, |
| 1076 | const struct nfnl_info *info, |
| 1077 | const struct nlattr * const nfqa[]) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1078 | { |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1079 | struct nfnl_queue_net *q = nfnl_queue_pernet(info->net); |
Pablo Neira Ayuso | ef4b65e | 2021-05-31 00:08:09 +0200 | [diff] [blame] | 1080 | u16 queue_num = ntohs(info->nfmsg->res_id); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1081 | struct nf_queue_entry *entry, *tmp; |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1082 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 1083 | struct nfqnl_instance *queue; |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1084 | unsigned int verdict, maxid; |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1085 | LIST_HEAD(batch_list); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1086 | |
| 1087 | queue = verdict_instance_lookup(q, queue_num, |
| 1088 | NETLINK_CB(skb).portid); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1089 | if (IS_ERR(queue)) |
| 1090 | return PTR_ERR(queue); |
| 1091 | |
| 1092 | vhdr = verdicthdr_get(nfqa); |
| 1093 | if (!vhdr) |
| 1094 | return -EINVAL; |
| 1095 | |
| 1096 | verdict = ntohl(vhdr->verdict); |
| 1097 | maxid = ntohl(vhdr->id); |
| 1098 | |
| 1099 | spin_lock_bh(&queue->lock); |
| 1100 | |
| 1101 | list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) { |
| 1102 | if (nfq_id_after(entry->id, maxid)) |
| 1103 | break; |
| 1104 | __dequeue_entry(queue, entry); |
| 1105 | list_add_tail(&entry->list, &batch_list); |
| 1106 | } |
| 1107 | |
| 1108 | spin_unlock_bh(&queue->lock); |
| 1109 | |
| 1110 | if (list_empty(&batch_list)) |
| 1111 | return -ENOENT; |
| 1112 | |
| 1113 | list_for_each_entry_safe(entry, tmp, &batch_list, list) { |
| 1114 | if (nfqa[NFQA_MARK]) |
| 1115 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 1116 | |
Nicolas Dichtel | 98eee88 | 2022-02-04 11:21:43 +0100 | [diff] [blame] | 1117 | if (nfqa[NFQA_PRIORITY]) |
| 1118 | entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY])); |
| 1119 | |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 1120 | nfqnl_reinject(entry, verdict); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1121 | } |
| 1122 | return 0; |
| 1123 | } |
| 1124 | |
Florian Westphal | 285c8a7 | 2022-01-07 05:03:24 +0100 | [diff] [blame] | 1125 | static struct nf_conn *nfqnl_ct_parse(const struct nfnl_ct_hook *nfnl_ct, |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1126 | const struct nlmsghdr *nlh, |
| 1127 | const struct nlattr * const nfqa[], |
| 1128 | struct nf_queue_entry *entry, |
| 1129 | enum ip_conntrack_info *ctinfo) |
| 1130 | { |
Florian Westphal | 83ace77 | 2021-01-20 16:30:03 +0100 | [diff] [blame] | 1131 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1132 | struct nf_conn *ct; |
| 1133 | |
Florian Westphal | 83ace77 | 2021-01-20 16:30:03 +0100 | [diff] [blame] | 1134 | ct = nf_ct_get(entry->skb, ctinfo); |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1135 | if (ct == NULL) |
| 1136 | return NULL; |
| 1137 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1138 | if (nfnl_ct->parse(nfqa[NFQA_CT], ct) < 0) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1139 | return NULL; |
| 1140 | |
| 1141 | if (nfqa[NFQA_EXP]) |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1142 | nfnl_ct->attach_expect(nfqa[NFQA_EXP], ct, |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1143 | NETLINK_CB(entry->skb).portid, |
| 1144 | nlmsg_report(nlh)); |
| 1145 | return ct; |
Florian Westphal | 83ace77 | 2021-01-20 16:30:03 +0100 | [diff] [blame] | 1146 | #else |
| 1147 | return NULL; |
| 1148 | #endif |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1149 | } |
| 1150 | |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1151 | static int nfqa_parse_bridge(struct nf_queue_entry *entry, |
| 1152 | const struct nlattr * const nfqa[]) |
| 1153 | { |
| 1154 | if (nfqa[NFQA_VLAN]) { |
| 1155 | struct nlattr *tb[NFQA_VLAN_MAX + 1]; |
| 1156 | int err; |
| 1157 | |
Johannes Berg | 8cb0817 | 2019-04-26 14:07:28 +0200 | [diff] [blame] | 1158 | err = nla_parse_nested_deprecated(tb, NFQA_VLAN_MAX, |
| 1159 | nfqa[NFQA_VLAN], |
| 1160 | nfqa_vlan_policy, NULL); |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1161 | if (err < 0) |
| 1162 | return err; |
| 1163 | |
| 1164 | if (!tb[NFQA_VLAN_TCI] || !tb[NFQA_VLAN_PROTO]) |
| 1165 | return -EINVAL; |
| 1166 | |
Michał Mirosław | 82eea4c | 2018-11-09 00:18:02 +0100 | [diff] [blame] | 1167 | __vlan_hwaccel_put_tag(entry->skb, |
| 1168 | nla_get_be16(tb[NFQA_VLAN_PROTO]), |
| 1169 | ntohs(nla_get_be16(tb[NFQA_VLAN_TCI]))); |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | if (nfqa[NFQA_L2HDR]) { |
| 1173 | int mac_header_len = entry->skb->network_header - |
| 1174 | entry->skb->mac_header; |
| 1175 | |
| 1176 | if (mac_header_len != nla_len(nfqa[NFQA_L2HDR])) |
| 1177 | return -EINVAL; |
| 1178 | else if (mac_header_len > 0) |
| 1179 | memcpy(skb_mac_header(entry->skb), |
| 1180 | nla_data(nfqa[NFQA_L2HDR]), |
| 1181 | mac_header_len); |
| 1182 | } |
| 1183 | |
| 1184 | return 0; |
| 1185 | } |
| 1186 | |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1187 | static int nfqnl_recv_verdict(struct sk_buff *skb, const struct nfnl_info *info, |
| 1188 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1189 | { |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1190 | struct nfnl_queue_net *q = nfnl_queue_pernet(info->net); |
Pablo Neira Ayuso | ef4b65e | 2021-05-31 00:08:09 +0200 | [diff] [blame] | 1191 | u_int16_t queue_num = ntohs(info->nfmsg->res_id); |
Florian Westphal | 285c8a7 | 2022-01-07 05:03:24 +0100 | [diff] [blame] | 1192 | const struct nfnl_ct_hook *nfnl_ct; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1193 | struct nfqnl_msg_verdict_hdr *vhdr; |
Kees Cook | 3f649ab | 2020-06-03 13:09:38 -0700 | [diff] [blame] | 1194 | enum ip_conntrack_info ctinfo; |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1195 | struct nfqnl_instance *queue; |
| 1196 | struct nf_queue_entry *entry; |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1197 | struct nf_conn *ct = NULL; |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1198 | unsigned int verdict; |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1199 | int err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1200 | |
Liping Zhang | 00a3101 | 2016-08-08 22:07:27 +0800 | [diff] [blame] | 1201 | queue = verdict_instance_lookup(q, queue_num, |
| 1202 | NETLINK_CB(skb).portid); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1203 | if (IS_ERR(queue)) |
| 1204 | return PTR_ERR(queue); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1205 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1206 | vhdr = verdicthdr_get(nfqa); |
| 1207 | if (!vhdr) |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 1208 | return -EINVAL; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1209 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1210 | verdict = ntohl(vhdr->verdict); |
| 1211 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 1212 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 1213 | if (entry == NULL) |
| 1214 | return -ENOENT; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1215 | |
Arnd Bergmann | 8e66216 | 2015-11-19 13:49:59 +0100 | [diff] [blame] | 1216 | /* rcu lock already held from nfnl->call_rcu. */ |
| 1217 | nfnl_ct = rcu_dereference(nfnl_ct_hook); |
| 1218 | |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 1219 | if (nfqa[NFQA_CT]) { |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1220 | if (nfnl_ct != NULL) |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1221 | ct = nfqnl_ct_parse(nfnl_ct, info->nlh, nfqa, entry, |
| 1222 | &ctinfo); |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 1223 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 1224 | |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1225 | if (entry->state.pf == PF_BRIDGE) { |
| 1226 | err = nfqa_parse_bridge(entry, nfqa); |
| 1227 | if (err < 0) |
| 1228 | return err; |
| 1229 | } |
| 1230 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1231 | if (nfqa[NFQA_PAYLOAD]) { |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1232 | u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]); |
| 1233 | int diff = payload_len - entry->skb->len; |
| 1234 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1235 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1236 | payload_len, entry, diff) < 0) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1237 | verdict = NF_DROP; |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1238 | |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1239 | if (ct && diff) |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1240 | nfnl_ct->seq_adjust(entry->skb, ct, ctinfo, diff); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1241 | } |
| 1242 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1243 | if (nfqa[NFQA_MARK]) |
Patrick McHardy | ea3a66f | 2007-12-05 01:30:02 -0800 | [diff] [blame] | 1244 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1245 | |
Nicolas Dichtel | 98eee88 | 2022-02-04 11:21:43 +0100 | [diff] [blame] | 1246 | if (nfqa[NFQA_PRIORITY]) |
| 1247 | entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY])); |
| 1248 | |
Pablo Neira Ayuso | 368982c | 2018-05-23 09:17:24 +0200 | [diff] [blame] | 1249 | nfqnl_reinject(entry, verdict); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1250 | return 0; |
| 1251 | } |
| 1252 | |
Pablo Neira Ayuso | 797d498 | 2021-04-23 00:17:10 +0200 | [diff] [blame] | 1253 | static int nfqnl_recv_unsupp(struct sk_buff *skb, const struct nfnl_info *info, |
| 1254 | const struct nlattr * const cda[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1255 | { |
| 1256 | return -ENOTSUPP; |
| 1257 | } |
| 1258 | |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 1259 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
| 1260 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, |
| 1261 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, |
Eric Dumazet | ba062eb | 2018-06-13 09:13:39 -0700 | [diff] [blame] | 1262 | [NFQA_CFG_QUEUE_MAXLEN] = { .type = NLA_U32 }, |
| 1263 | [NFQA_CFG_MASK] = { .type = NLA_U32 }, |
| 1264 | [NFQA_CFG_FLAGS] = { .type = NLA_U32 }, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1265 | }; |
| 1266 | |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 1267 | static const struct nf_queue_handler nfqh = { |
Arushi Singhal | d4ef383 | 2017-04-02 14:52:12 +0530 | [diff] [blame] | 1268 | .outfn = nfqnl_enqueue_packet, |
| 1269 | .nf_hook_drop = nfqnl_nf_hook_drop, |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 1270 | }; |
| 1271 | |
Pablo Neira Ayuso | a655536 | 2021-04-23 00:17:09 +0200 | [diff] [blame] | 1272 | static int nfqnl_recv_config(struct sk_buff *skb, const struct nfnl_info *info, |
| 1273 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1274 | { |
Pablo Neira Ayuso | a655536 | 2021-04-23 00:17:09 +0200 | [diff] [blame] | 1275 | struct nfnl_queue_net *q = nfnl_queue_pernet(info->net); |
Pablo Neira Ayuso | ef4b65e | 2021-05-31 00:08:09 +0200 | [diff] [blame] | 1276 | u_int16_t queue_num = ntohs(info->nfmsg->res_id); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1277 | struct nfqnl_msg_config_cmd *cmd = NULL; |
Pablo Neira Ayuso | a655536 | 2021-04-23 00:17:09 +0200 | [diff] [blame] | 1278 | struct nfqnl_instance *queue; |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1279 | __u32 flags = 0, mask = 0; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1280 | int ret = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1281 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1282 | if (nfqa[NFQA_CFG_CMD]) { |
| 1283 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); |
| 1284 | |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 1285 | /* Obsolete commands without queue context */ |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1286 | switch (cmd->command) { |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 1287 | case NFQNL_CFG_CMD_PF_BIND: return 0; |
| 1288 | case NFQNL_CFG_CMD_PF_UNBIND: return 0; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1289 | } |
Patrick McHardy | a3c8e7f | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 1290 | } |
| 1291 | |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1292 | /* Check if we support these flags in first place, dependencies should |
| 1293 | * be there too not to break atomicity. |
| 1294 | */ |
| 1295 | if (nfqa[NFQA_CFG_FLAGS]) { |
| 1296 | if (!nfqa[NFQA_CFG_MASK]) { |
| 1297 | /* A mask is needed to specify which flags are being |
| 1298 | * changed. |
| 1299 | */ |
| 1300 | return -EINVAL; |
| 1301 | } |
| 1302 | |
| 1303 | flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS])); |
| 1304 | mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK])); |
| 1305 | |
| 1306 | if (flags >= NFQA_CFG_F_MAX) |
| 1307 | return -EOPNOTSUPP; |
| 1308 | |
| 1309 | #if !IS_ENABLED(CONFIG_NETWORK_SECMARK) |
| 1310 | if (flags & mask & NFQA_CFG_F_SECCTX) |
| 1311 | return -EOPNOTSUPP; |
| 1312 | #endif |
Ken-ichirou MATSUZAWA | 71b2e5f | 2016-01-05 09:32:59 +0900 | [diff] [blame] | 1313 | if ((flags & mask & NFQA_CFG_F_CONNTRACK) && |
| 1314 | !rcu_access_pointer(nfnl_ct_hook)) { |
| 1315 | #ifdef CONFIG_MODULES |
| 1316 | nfnl_unlock(NFNL_SUBSYS_QUEUE); |
| 1317 | request_module("ip_conntrack_netlink"); |
| 1318 | nfnl_lock(NFNL_SUBSYS_QUEUE); |
| 1319 | if (rcu_access_pointer(nfnl_ct_hook)) |
| 1320 | return -EAGAIN; |
| 1321 | #endif |
| 1322 | return -EOPNOTSUPP; |
| 1323 | } |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1324 | } |
| 1325 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1326 | rcu_read_lock(); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1327 | queue = instance_lookup(q, queue_num); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1328 | if (queue && queue->peer_portid != NETLINK_CB(skb).portid) { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1329 | ret = -EPERM; |
| 1330 | goto err_out_unlock; |
| 1331 | } |
Patrick McHardy | a3c8e7f | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 1332 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1333 | if (cmd != NULL) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1334 | switch (cmd->command) { |
| 1335 | case NFQNL_CFG_CMD_BIND: |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1336 | if (queue) { |
| 1337 | ret = -EBUSY; |
| 1338 | goto err_out_unlock; |
| 1339 | } |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1340 | queue = instance_create(q, queue_num, |
| 1341 | NETLINK_CB(skb).portid); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 1342 | if (IS_ERR(queue)) { |
| 1343 | ret = PTR_ERR(queue); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1344 | goto err_out_unlock; |
| 1345 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1346 | break; |
| 1347 | case NFQNL_CFG_CMD_UNBIND: |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1348 | if (!queue) { |
| 1349 | ret = -ENODEV; |
| 1350 | goto err_out_unlock; |
| 1351 | } |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1352 | instance_destroy(q, queue); |
Ken-ichirou MATSUZAWA | 17bc6b4 | 2016-01-05 09:29:54 +0900 | [diff] [blame] | 1353 | goto err_out_unlock; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1354 | case NFQNL_CFG_CMD_PF_BIND: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1355 | case NFQNL_CFG_CMD_PF_UNBIND: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1356 | break; |
| 1357 | default: |
Patrick McHardy | cd21f0a | 2007-12-17 22:40:19 -0800 | [diff] [blame] | 1358 | ret = -ENOTSUPP; |
Ken-ichirou MATSUZAWA | 21c3c97 | 2016-01-05 09:31:40 +0900 | [diff] [blame] | 1359 | goto err_out_unlock; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1360 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1361 | } |
| 1362 | |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1363 | if (!queue) { |
| 1364 | ret = -ENODEV; |
| 1365 | goto err_out_unlock; |
| 1366 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1367 | |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1368 | if (nfqa[NFQA_CFG_PARAMS]) { |
| 1369 | struct nfqnl_msg_config_params *params = |
| 1370 | nla_data(nfqa[NFQA_CFG_PARAMS]); |
| 1371 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1372 | nfqnl_set_mode(queue, params->copy_mode, |
| 1373 | ntohl(params->copy_range)); |
| 1374 | } |
| 1375 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1376 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1377 | __be32 *queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
Patrick McHardy | a3c8e7f | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 1378 | |
Eric Leblond | 829e17a | 2006-11-29 02:35:33 +0100 | [diff] [blame] | 1379 | spin_lock_bh(&queue->lock); |
| 1380 | queue->queue_maxlen = ntohl(*queue_maxlen); |
| 1381 | spin_unlock_bh(&queue->lock); |
| 1382 | } |
| 1383 | |
Krishna Kumar | fdb694a0 | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 1384 | if (nfqa[NFQA_CFG_FLAGS]) { |
Krishna Kumar | fdb694a0 | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 1385 | spin_lock_bh(&queue->lock); |
| 1386 | queue->flags &= ~mask; |
| 1387 | queue->flags |= flags & mask; |
| 1388 | spin_unlock_bh(&queue->lock); |
| 1389 | } |
| 1390 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1391 | err_out_unlock: |
| 1392 | rcu_read_unlock(); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1393 | return ret; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1394 | } |
| 1395 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1396 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
Pablo Neira Ayuso | 50f2db9 | 2021-04-23 00:17:12 +0200 | [diff] [blame] | 1397 | [NFQNL_MSG_PACKET] = { |
| 1398 | .call = nfqnl_recv_unsupp, |
| 1399 | .type = NFNL_CB_RCU, |
| 1400 | .attr_count = NFQA_MAX, |
| 1401 | }, |
| 1402 | [NFQNL_MSG_VERDICT] = { |
| 1403 | .call = nfqnl_recv_verdict, |
| 1404 | .type = NFNL_CB_RCU, |
| 1405 | .attr_count = NFQA_MAX, |
| 1406 | .policy = nfqa_verdict_policy |
| 1407 | }, |
| 1408 | [NFQNL_MSG_CONFIG] = { |
| 1409 | .call = nfqnl_recv_config, |
| 1410 | .type = NFNL_CB_MUTEX, |
| 1411 | .attr_count = NFQA_CFG_MAX, |
| 1412 | .policy = nfqa_cfg_policy |
| 1413 | }, |
| 1414 | [NFQNL_MSG_VERDICT_BATCH] = { |
| 1415 | .call = nfqnl_recv_verdict_batch, |
| 1416 | .type = NFNL_CB_RCU, |
| 1417 | .attr_count = NFQA_MAX, |
| 1418 | .policy = nfqa_verdict_batch_policy |
| 1419 | }, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1420 | }; |
| 1421 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1422 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1423 | .name = "nf_queue", |
| 1424 | .subsys_id = NFNL_SUBSYS_QUEUE, |
| 1425 | .cb_count = NFQNL_MSG_MAX, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1426 | .cb = nfqnl_cb, |
| 1427 | }; |
| 1428 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1429 | #ifdef CONFIG_PROC_FS |
| 1430 | struct iter_state { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1431 | struct seq_net_private p; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1432 | unsigned int bucket; |
| 1433 | }; |
| 1434 | |
| 1435 | static struct hlist_node *get_first(struct seq_file *seq) |
| 1436 | { |
| 1437 | struct iter_state *st = seq->private; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1438 | struct net *net; |
| 1439 | struct nfnl_queue_net *q; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1440 | |
| 1441 | if (!st) |
| 1442 | return NULL; |
| 1443 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1444 | net = seq_file_net(seq); |
| 1445 | q = nfnl_queue_pernet(net); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1446 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1447 | if (!hlist_empty(&q->instance_table[st->bucket])) |
| 1448 | return q->instance_table[st->bucket].first; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1449 | } |
| 1450 | return NULL; |
| 1451 | } |
| 1452 | |
| 1453 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) |
| 1454 | { |
| 1455 | struct iter_state *st = seq->private; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1456 | struct net *net = seq_file_net(seq); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1457 | |
| 1458 | h = h->next; |
| 1459 | while (!h) { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1460 | struct nfnl_queue_net *q; |
| 1461 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1462 | if (++st->bucket >= INSTANCE_BUCKETS) |
| 1463 | return NULL; |
| 1464 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1465 | q = nfnl_queue_pernet(net); |
| 1466 | h = q->instance_table[st->bucket].first; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1467 | } |
| 1468 | return h; |
| 1469 | } |
| 1470 | |
| 1471 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) |
| 1472 | { |
| 1473 | struct hlist_node *head; |
| 1474 | head = get_first(seq); |
| 1475 | |
| 1476 | if (head) |
| 1477 | while (pos && (head = get_next(seq, head))) |
| 1478 | pos--; |
| 1479 | return pos ? NULL : head; |
| 1480 | } |
| 1481 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1482 | static void *seq_start(struct seq_file *s, loff_t *pos) |
| 1483 | __acquires(nfnl_queue_pernet(seq_file_net(s))->instances_lock) |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1484 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1485 | spin_lock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
| 1486 | return get_idx(s, *pos); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1487 | } |
| 1488 | |
| 1489 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 1490 | { |
| 1491 | (*pos)++; |
| 1492 | return get_next(s, v); |
| 1493 | } |
| 1494 | |
| 1495 | static void seq_stop(struct seq_file *s, void *v) |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1496 | __releases(nfnl_queue_pernet(seq_file_net(s))->instances_lock) |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1497 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1498 | spin_unlock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1499 | } |
| 1500 | |
| 1501 | static int seq_show(struct seq_file *s, void *v) |
| 1502 | { |
| 1503 | const struct nfqnl_instance *inst = v; |
| 1504 | |
Richard Weinberger | 6b46f7b | 2015-04-13 00:52:38 +0200 | [diff] [blame] | 1505 | seq_printf(s, "%5u %6u %5u %1u %5u %5u %5u %8u %2d\n", |
Steven Rostedt (Red Hat) | e71456ae | 2014-10-27 17:43:45 -0400 | [diff] [blame] | 1506 | inst->queue_num, |
| 1507 | inst->peer_portid, inst->queue_total, |
| 1508 | inst->copy_mode, inst->copy_range, |
| 1509 | inst->queue_dropped, inst->queue_user_dropped, |
| 1510 | inst->id_sequence, 1); |
Joe Perches | 861fb10 | 2015-05-12 18:28:23 -0700 | [diff] [blame] | 1511 | return 0; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1512 | } |
| 1513 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1514 | static const struct seq_operations nfqnl_seq_ops = { |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1515 | .start = seq_start, |
| 1516 | .next = seq_next, |
| 1517 | .stop = seq_stop, |
| 1518 | .show = seq_show, |
| 1519 | }; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1520 | #endif /* PROC_FS */ |
| 1521 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1522 | static int __net_init nfnl_queue_net_init(struct net *net) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1523 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1524 | unsigned int i; |
| 1525 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1526 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1527 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1528 | INIT_HLIST_HEAD(&q->instance_table[i]); |
| 1529 | |
| 1530 | spin_lock_init(&q->instances_lock); |
| 1531 | |
| 1532 | #ifdef CONFIG_PROC_FS |
Christoph Hellwig | c350637 | 2018-04-10 19:42:55 +0200 | [diff] [blame] | 1533 | if (!proc_create_net("nfnetlink_queue", 0440, net->nf.proc_netfilter, |
| 1534 | &nfqnl_seq_ops, sizeof(struct iter_state))) |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1535 | return -ENOMEM; |
| 1536 | #endif |
| 1537 | return 0; |
| 1538 | } |
| 1539 | |
| 1540 | static void __net_exit nfnl_queue_net_exit(struct net *net) |
| 1541 | { |
Vasily Averin | 613d077 | 2017-11-12 14:32:37 +0300 | [diff] [blame] | 1542 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
| 1543 | unsigned int i; |
| 1544 | |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1545 | #ifdef CONFIG_PROC_FS |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1546 | remove_proc_entry("nfnetlink_queue", net->nf.proc_netfilter); |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1547 | #endif |
Vasily Averin | 613d077 | 2017-11-12 14:32:37 +0300 | [diff] [blame] | 1548 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
| 1549 | WARN_ON_ONCE(!hlist_empty(&q->instance_table[i])); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1550 | } |
| 1551 | |
| 1552 | static struct pernet_operations nfnl_queue_net_ops = { |
Eric W. Biederman | dc3ee32 | 2016-05-13 21:18:52 -0500 | [diff] [blame] | 1553 | .init = nfnl_queue_net_init, |
| 1554 | .exit = nfnl_queue_net_exit, |
Eric W. Biederman | dc3ee32 | 2016-05-13 21:18:52 -0500 | [diff] [blame] | 1555 | .id = &nfnl_queue_net_id, |
| 1556 | .size = sizeof(struct nfnl_queue_net), |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1557 | }; |
| 1558 | |
| 1559 | static int __init nfnetlink_queue_init(void) |
| 1560 | { |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1561 | int status; |
| 1562 | |
| 1563 | status = register_pernet_subsys(&nfnl_queue_net_ops); |
| 1564 | if (status < 0) { |
Arushi Singhal | 5191d70 | 2018-03-12 18:36:29 +0530 | [diff] [blame] | 1565 | pr_err("failed to register pernet ops\n"); |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1566 | goto out; |
| 1567 | } |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1568 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1569 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
| 1570 | status = nfnetlink_subsys_register(&nfqnl_subsys); |
| 1571 | if (status < 0) { |
Arushi Singhal | 5191d70 | 2018-03-12 18:36:29 +0530 | [diff] [blame] | 1572 | pr_err("failed to create netlink socket\n"); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1573 | goto cleanup_netlink_notifier; |
| 1574 | } |
| 1575 | |
Gao Feng | 4e6577d | 2016-09-09 23:25:09 +0800 | [diff] [blame] | 1576 | status = register_netdevice_notifier(&nfqnl_dev_notifier); |
| 1577 | if (status < 0) { |
Arushi Singhal | 5191d70 | 2018-03-12 18:36:29 +0530 | [diff] [blame] | 1578 | pr_err("failed to register netdevice notifier\n"); |
Gao Feng | 4e6577d | 2016-09-09 23:25:09 +0800 | [diff] [blame] | 1579 | goto cleanup_netlink_subsys; |
| 1580 | } |
| 1581 | |
Florian Westphal | 8702997 | 2021-08-05 12:02:43 +0200 | [diff] [blame] | 1582 | nf_register_queue_handler(&nfqh); |
| 1583 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1584 | return status; |
| 1585 | |
Gao Feng | 4e6577d | 2016-09-09 23:25:09 +0800 | [diff] [blame] | 1586 | cleanup_netlink_subsys: |
| 1587 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1588 | cleanup_netlink_notifier: |
| 1589 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); |
Nikolay Borisov | 639e077 | 2015-12-07 12:13:26 +0200 | [diff] [blame] | 1590 | unregister_pernet_subsys(&nfnl_queue_net_ops); |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1591 | out: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1592 | return status; |
| 1593 | } |
| 1594 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1595 | static void __exit nfnetlink_queue_fini(void) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1596 | { |
Florian Westphal | 8702997 | 2021-08-05 12:02:43 +0200 | [diff] [blame] | 1597 | nf_unregister_queue_handler(); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1598 | unregister_netdevice_notifier(&nfqnl_dev_notifier); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1599 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
| 1600 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1601 | unregister_pernet_subsys(&nfnl_queue_net_ops); |
Jesper Dangaard Brouer | 67137f3 | 2009-06-08 03:11:33 +0000 | [diff] [blame] | 1602 | |
| 1603 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1604 | } |
| 1605 | |
| 1606 | MODULE_DESCRIPTION("netfilter packet queue handler"); |
| 1607 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 1608 | MODULE_LICENSE("GPL"); |
| 1609 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); |
| 1610 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1611 | module_init(nfnetlink_queue_init); |
| 1612 | module_exit(nfnetlink_queue_fini); |