Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This is a module which is used for queueing packets and communicating with |
Jesper Dangaard Brouer | 67137f3 | 2009-06-08 03:11:33 +0000 | [diff] [blame] | 3 | * userspace via nfnetlink. |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 4 | * |
| 5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> |
Patrick McHardy | 4ad9d4f | 2007-12-05 01:31:17 -0800 | [diff] [blame] | 6 | * (C) 2007 by Patrick McHardy <kaber@trash.net> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 7 | * |
| 8 | * Based on the old ipv4-only ip_queue.c: |
| 9 | * (C) 2000-2002 James Morris <jmorris@intercode.com.au> |
| 10 | * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License version 2 as |
| 14 | * published by the Free Software Foundation. |
| 15 | * |
| 16 | */ |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/spinlock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 21 | #include <linux/slab.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 22 | #include <linux/notifier.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/netfilter.h> |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 25 | #include <linux/proc_fs.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 26 | #include <linux/netfilter_ipv4.h> |
| 27 | #include <linux/netfilter_ipv6.h> |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 28 | #include <linux/netfilter_bridge.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 29 | #include <linux/netfilter/nfnetlink.h> |
| 30 | #include <linux/netfilter/nfnetlink_queue.h> |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 31 | #include <linux/netfilter/nf_conntrack_common.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 32 | #include <linux/list.h> |
| 33 | #include <net/sock.h> |
David S. Miller | 83111e7 | 2014-01-06 13:36:06 -0500 | [diff] [blame] | 34 | #include <net/tcp_states.h> |
Patrick McHardy | c01cd42 | 2007-12-05 01:24:48 -0800 | [diff] [blame] | 35 | #include <net/netfilter/nf_queue.h> |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 36 | #include <net/netns/generic.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 37 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 38 | #include <linux/atomic.h> |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 39 | |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 40 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 41 | #include "../bridge/br_private.h" |
| 42 | #endif |
| 43 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 44 | #define NFQNL_QMAX_DEFAULT 1024 |
| 45 | |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 46 | /* We're using struct nlattr which has 16bit nla_len. Note that nla_len |
| 47 | * includes the header length. Thus, the maximum packet length that we |
| 48 | * support is 65531 bytes. We send truncated packets if the specified length |
| 49 | * is larger than that. Userspace can check for presence of NFQA_CAP_LEN |
| 50 | * attribute to detect truncation. |
| 51 | */ |
| 52 | #define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN) |
| 53 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 54 | struct nfqnl_instance { |
| 55 | struct hlist_node hlist; /* global list of queues */ |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 56 | struct rcu_head rcu; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 57 | |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 58 | u32 peer_portid; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 59 | unsigned int queue_maxlen; |
| 60 | unsigned int copy_range; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 61 | unsigned int queue_dropped; |
| 62 | unsigned int queue_user_dropped; |
| 63 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 64 | |
| 65 | u_int16_t queue_num; /* number of this queue */ |
| 66 | u_int8_t copy_mode; |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 67 | u_int32_t flags; /* Set using NFQA_CFG_FLAGS */ |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 68 | /* |
| 69 | * Following fields are dirtied for each queued packet, |
| 70 | * keep them in same cache line if possible. |
| 71 | */ |
| 72 | spinlock_t lock; |
| 73 | unsigned int queue_total; |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 74 | unsigned int id_sequence; /* 'sequence' of pkt ids */ |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 75 | struct list_head queue_list; /* packets in queue */ |
| 76 | }; |
| 77 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 78 | typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 79 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 80 | static int nfnl_queue_net_id __read_mostly; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 81 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 82 | #define INSTANCE_BUCKETS 16 |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 83 | struct nfnl_queue_net { |
| 84 | spinlock_t instances_lock; |
| 85 | struct hlist_head instance_table[INSTANCE_BUCKETS]; |
| 86 | }; |
| 87 | |
| 88 | static struct nfnl_queue_net *nfnl_queue_pernet(struct net *net) |
| 89 | { |
| 90 | return net_generic(net, nfnl_queue_net_id); |
| 91 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 92 | |
| 93 | static inline u_int8_t instance_hashfn(u_int16_t queue_num) |
| 94 | { |
Pablo Neira Ayuso | 1cdb090 | 2013-03-14 06:03:17 +0000 | [diff] [blame] | 95 | return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | static struct nfqnl_instance * |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 99 | instance_lookup(struct nfnl_queue_net *q, u_int16_t queue_num) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 100 | { |
| 101 | struct hlist_head *head; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 102 | struct nfqnl_instance *inst; |
| 103 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 104 | head = &q->instance_table[instance_hashfn(queue_num)]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 105 | hlist_for_each_entry_rcu(inst, head, hlist) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 106 | if (inst->queue_num == queue_num) |
| 107 | return inst; |
| 108 | } |
| 109 | return NULL; |
| 110 | } |
| 111 | |
| 112 | static struct nfqnl_instance * |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 113 | 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] | 114 | { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 115 | struct nfqnl_instance *inst; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 116 | unsigned int h; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 117 | int err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 118 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 119 | spin_lock(&q->instances_lock); |
| 120 | if (instance_lookup(q, queue_num)) { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 121 | err = -EEXIST; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 122 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 123 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 124 | |
Harald Welte | 10dfdc6 | 2005-11-03 19:20:07 +0100 | [diff] [blame] | 125 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 126 | if (!inst) { |
| 127 | err = -ENOMEM; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 128 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 129 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 130 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 131 | inst->queue_num = queue_num; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 132 | inst->peer_portid = portid; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 133 | inst->queue_maxlen = NFQNL_QMAX_DEFAULT; |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 134 | inst->copy_range = NFQNL_MAX_COPY_RANGE; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 135 | inst->copy_mode = NFQNL_COPY_NONE; |
YOSHIFUJI Hideaki | 181a46a | 2006-01-04 13:56:54 -0800 | [diff] [blame] | 136 | spin_lock_init(&inst->lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 137 | INIT_LIST_HEAD(&inst->queue_list); |
| 138 | |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 139 | if (!try_module_get(THIS_MODULE)) { |
| 140 | err = -EAGAIN; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 141 | goto out_free; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 142 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 143 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 144 | h = instance_hashfn(queue_num); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 145 | hlist_add_head_rcu(&inst->hlist, &q->instance_table[h]); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 146 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 147 | spin_unlock(&q->instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 148 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 149 | return inst; |
| 150 | |
| 151 | out_free: |
| 152 | kfree(inst); |
| 153 | out_unlock: |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 154 | spin_unlock(&q->instances_lock); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 155 | return ERR_PTR(err); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 156 | } |
| 157 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 158 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
| 159 | unsigned long data); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 160 | |
| 161 | static void |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 162 | instance_destroy_rcu(struct rcu_head *head) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 163 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 164 | struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance, |
| 165 | rcu); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 166 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 167 | nfqnl_flush(inst, NULL, 0); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 168 | kfree(inst); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 169 | module_put(THIS_MODULE); |
| 170 | } |
| 171 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 172 | static void |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 173 | __instance_destroy(struct nfqnl_instance *inst) |
| 174 | { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 175 | hlist_del_rcu(&inst->hlist); |
| 176 | call_rcu(&inst->rcu, instance_destroy_rcu); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 177 | } |
| 178 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 179 | static void |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 180 | instance_destroy(struct nfnl_queue_net *q, struct nfqnl_instance *inst) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 181 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 182 | spin_lock(&q->instances_lock); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 183 | __instance_destroy(inst); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 184 | spin_unlock(&q->instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 185 | } |
| 186 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 187 | static inline void |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 188 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 189 | { |
Patrick McHardy | 0ac41e8 | 2007-12-05 01:25:03 -0800 | [diff] [blame] | 190 | list_add_tail(&entry->list, &queue->queue_list); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 191 | queue->queue_total++; |
| 192 | } |
| 193 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 194 | static void |
| 195 | __dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
| 196 | { |
| 197 | list_del(&entry->list); |
| 198 | queue->queue_total--; |
| 199 | } |
| 200 | |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 201 | static struct nf_queue_entry * |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 202 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 203 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 204 | struct nf_queue_entry *entry = NULL, *i; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 205 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 206 | spin_lock_bh(&queue->lock); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 207 | |
| 208 | list_for_each_entry(i, &queue->queue_list, list) { |
| 209 | if (i->id == id) { |
| 210 | entry = i; |
| 211 | break; |
| 212 | } |
| 213 | } |
| 214 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 215 | if (entry) |
| 216 | __dequeue_entry(queue, entry); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 217 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 218 | spin_unlock_bh(&queue->lock); |
| 219 | |
| 220 | return entry; |
| 221 | } |
| 222 | |
| 223 | static void |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 224 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 225 | { |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 226 | struct nf_queue_entry *entry, *next; |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 227 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 228 | spin_lock_bh(&queue->lock); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 229 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
| 230 | if (!cmpfn || cmpfn(entry, data)) { |
| 231 | list_del(&entry->list); |
| 232 | queue->queue_total--; |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame] | 233 | nf_reinject(entry, NF_DROP); |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 234 | } |
| 235 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 236 | spin_unlock_bh(&queue->lock); |
| 237 | } |
| 238 | |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 239 | static int |
| 240 | nfqnl_put_packet_info(struct sk_buff *nlskb, struct sk_buff *packet, |
| 241 | bool csum_verify) |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 242 | { |
| 243 | __u32 flags = 0; |
| 244 | |
| 245 | if (packet->ip_summed == CHECKSUM_PARTIAL) |
| 246 | flags = NFQA_SKB_CSUMNOTREADY; |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 247 | else if (csum_verify) |
| 248 | flags = NFQA_SKB_CSUM_NOTVERIFIED; |
| 249 | |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 250 | if (skb_is_gso(packet)) |
| 251 | flags |= NFQA_SKB_GSO; |
| 252 | |
| 253 | return flags ? nla_put_be32(nlskb, NFQA_SKB_INFO, htonl(flags)) : 0; |
| 254 | } |
| 255 | |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 256 | static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk) |
| 257 | { |
| 258 | const struct cred *cred; |
| 259 | |
Eric Dumazet | a839923 | 2015-03-16 21:06:15 -0700 | [diff] [blame] | 260 | if (!sk_fullsock(sk)) |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 261 | return 0; |
| 262 | |
| 263 | read_lock_bh(&sk->sk_callback_lock); |
| 264 | if (sk->sk_socket && sk->sk_socket->file) { |
| 265 | cred = sk->sk_socket->file->f_cred; |
| 266 | if (nla_put_be32(skb, NFQA_UID, |
| 267 | htonl(from_kuid_munged(&init_user_ns, cred->fsuid)))) |
| 268 | goto nla_put_failure; |
| 269 | if (nla_put_be32(skb, NFQA_GID, |
| 270 | htonl(from_kgid_munged(&init_user_ns, cred->fsgid)))) |
| 271 | goto nla_put_failure; |
| 272 | } |
| 273 | read_unlock_bh(&sk->sk_callback_lock); |
| 274 | return 0; |
| 275 | |
| 276 | nla_put_failure: |
| 277 | read_unlock_bh(&sk->sk_callback_lock); |
| 278 | return -1; |
| 279 | } |
| 280 | |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 281 | static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata) |
| 282 | { |
| 283 | u32 seclen = 0; |
| 284 | #if IS_ENABLED(CONFIG_NETWORK_SECMARK) |
| 285 | if (!skb || !sk_fullsock(skb->sk)) |
| 286 | return 0; |
| 287 | |
| 288 | read_lock_bh(&skb->sk->sk_callback_lock); |
| 289 | |
| 290 | if (skb->secmark) |
| 291 | security_secid_to_secctx(skb->secmark, secdata, &seclen); |
| 292 | |
| 293 | read_unlock_bh(&skb->sk->sk_callback_lock); |
| 294 | #endif |
| 295 | return seclen; |
| 296 | } |
| 297 | |
Stephane Bryant | 15824ab | 2016-03-26 08:42:11 +0100 | [diff] [blame] | 298 | static u32 nfqnl_get_bridge_size(struct nf_queue_entry *entry) |
| 299 | { |
| 300 | struct sk_buff *entskb = entry->skb; |
| 301 | u32 nlalen = 0; |
| 302 | |
| 303 | if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb)) |
| 304 | return 0; |
| 305 | |
| 306 | if (skb_vlan_tag_present(entskb)) |
| 307 | nlalen += nla_total_size(nla_total_size(sizeof(__be16)) + |
| 308 | nla_total_size(sizeof(__be16))); |
| 309 | |
| 310 | if (entskb->network_header > entskb->mac_header) |
| 311 | nlalen += nla_total_size((entskb->network_header - |
| 312 | entskb->mac_header)); |
| 313 | |
| 314 | return nlalen; |
| 315 | } |
| 316 | |
| 317 | static int nfqnl_put_bridge(struct nf_queue_entry *entry, struct sk_buff *skb) |
| 318 | { |
| 319 | struct sk_buff *entskb = entry->skb; |
| 320 | |
| 321 | if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb)) |
| 322 | return 0; |
| 323 | |
| 324 | if (skb_vlan_tag_present(entskb)) { |
| 325 | struct nlattr *nest; |
| 326 | |
| 327 | nest = nla_nest_start(skb, NFQA_VLAN | NLA_F_NESTED); |
| 328 | if (!nest) |
| 329 | goto nla_put_failure; |
| 330 | |
| 331 | if (nla_put_be16(skb, NFQA_VLAN_TCI, htons(entskb->vlan_tci)) || |
| 332 | nla_put_be16(skb, NFQA_VLAN_PROTO, entskb->vlan_proto)) |
| 333 | goto nla_put_failure; |
| 334 | |
| 335 | nla_nest_end(skb, nest); |
| 336 | } |
| 337 | |
| 338 | if (entskb->mac_header < entskb->network_header) { |
| 339 | int len = (int)(entskb->network_header - entskb->mac_header); |
| 340 | |
| 341 | if (nla_put(skb, NFQA_L2HDR, len, skb_mac_header(entskb))) |
| 342 | goto nla_put_failure; |
| 343 | } |
| 344 | |
| 345 | return 0; |
| 346 | |
| 347 | nla_put_failure: |
| 348 | return -1; |
| 349 | } |
| 350 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 351 | static struct sk_buff * |
Gao feng | 7433268 | 2013-09-23 19:20:55 +0800 | [diff] [blame] | 352 | nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 353 | struct nf_queue_entry *entry, |
| 354 | __be32 **packet_id_ptr) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 355 | { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 356 | size_t size; |
Florian Westphal | c5b0db3 | 2016-02-18 15:03:28 +0100 | [diff] [blame] | 357 | size_t data_len = 0, cap_len = 0; |
Thomas Graf | af2806f | 2013-12-13 15:22:17 +0100 | [diff] [blame] | 358 | unsigned int hlen = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 359 | struct sk_buff *skb; |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 360 | struct nlattr *nla; |
| 361 | struct nfqnl_msg_packet_hdr *pmsg; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 362 | struct nlmsghdr *nlh; |
| 363 | struct nfgenmsg *nfmsg; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 364 | struct sk_buff *entskb = entry->skb; |
| 365 | struct net_device *indev; |
| 366 | struct net_device *outdev; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 367 | struct nf_conn *ct = NULL; |
| 368 | enum ip_conntrack_info uninitialized_var(ctinfo); |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 369 | struct nfnl_ct_hook *nfnl_ct; |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 370 | bool csum_verify; |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 371 | char *secdata = NULL; |
| 372 | u32 seclen = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 373 | |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 374 | size = nlmsg_total_size(sizeof(struct nfgenmsg)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 375 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) |
| 376 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 377 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 378 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 379 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 380 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 381 | #endif |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 382 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
| 383 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 384 | + nla_total_size(sizeof(u_int32_t)) /* skbinfo */ |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 385 | + nla_total_size(sizeof(u_int32_t)); /* cap_len */ |
| 386 | |
| 387 | if (entskb->tstamp.tv64) |
| 388 | size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 389 | |
Stephane Bryant | 15824ab | 2016-03-26 08:42:11 +0100 | [diff] [blame] | 390 | size += nfqnl_get_bridge_size(entry); |
| 391 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 392 | if (entry->state.hook <= NF_INET_FORWARD || |
| 393 | (entry->state.hook == NF_INET_POST_ROUTING && entskb->sk == NULL)) |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 394 | csum_verify = !skb_csum_unnecessary(entskb); |
| 395 | else |
| 396 | csum_verify = false; |
| 397 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 398 | outdev = entry->state.out; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 399 | |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 400 | switch ((enum nfqnl_config_mode)ACCESS_ONCE(queue->copy_mode)) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 401 | case NFQNL_COPY_META: |
| 402 | case NFQNL_COPY_NONE: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 403 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 404 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 405 | case NFQNL_COPY_PACKET: |
Florian Westphal | 00bd1cc | 2013-04-19 04:58:27 +0000 | [diff] [blame] | 406 | if (!(queue->flags & NFQA_CFG_F_GSO) && |
| 407 | entskb->ip_summed == CHECKSUM_PARTIAL && |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 408 | skb_checksum_help(entskb)) |
Patrick McHardy | e7dfb09 | 2005-09-06 15:10:00 -0700 | [diff] [blame] | 409 | return NULL; |
Eric Dumazet | c463ac9 | 2010-06-09 18:07:06 +0200 | [diff] [blame] | 410 | |
| 411 | data_len = ACCESS_ONCE(queue->copy_range); |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 412 | if (data_len > entskb->len) |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 413 | data_len = entskb->len; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 414 | |
Thomas Graf | af2806f | 2013-12-13 15:22:17 +0100 | [diff] [blame] | 415 | hlen = skb_zerocopy_headlen(entskb); |
| 416 | hlen = min_t(unsigned int, hlen, data_len); |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 417 | size += sizeof(struct nlattr) + hlen; |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 418 | cap_len = entskb->len; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 419 | break; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 420 | } |
| 421 | |
Arnd Bergmann | 8e66216 | 2015-11-19 13:49:59 +0100 | [diff] [blame] | 422 | nfnl_ct = rcu_dereference(nfnl_ct_hook); |
| 423 | |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 424 | if (queue->flags & NFQA_CFG_F_CONNTRACK) { |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 425 | if (nfnl_ct != NULL) { |
| 426 | ct = nfnl_ct->get_ct(entskb, &ctinfo); |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 427 | if (ct != NULL) |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 428 | size += nfnl_ct->build_size(ct); |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 429 | } |
| 430 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 431 | |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 432 | if (queue->flags & NFQA_CFG_F_UID_GID) { |
| 433 | size += (nla_total_size(sizeof(u_int32_t)) /* uid */ |
| 434 | + nla_total_size(sizeof(u_int32_t))); /* gid */ |
| 435 | } |
| 436 | |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 437 | if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) { |
| 438 | seclen = nfqnl_get_sk_secctx(entskb, &secdata); |
| 439 | if (seclen) |
| 440 | size += nla_total_size(seclen); |
| 441 | } |
| 442 | |
Florian Westphal | c5b0db3 | 2016-02-18 15:03:28 +0100 | [diff] [blame] | 443 | skb = alloc_skb(size, GFP_ATOMIC); |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 444 | if (!skb) { |
| 445 | skb_tx_error(entskb); |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 446 | return NULL; |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 447 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 448 | |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 449 | nlh = nlmsg_put(skb, 0, 0, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 450 | NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET, |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 451 | sizeof(struct nfgenmsg), 0); |
| 452 | if (!nlh) { |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 453 | skb_tx_error(entskb); |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 454 | kfree_skb(skb); |
| 455 | return NULL; |
| 456 | } |
| 457 | nfmsg = nlmsg_data(nlh); |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 458 | nfmsg->nfgen_family = entry->state.pf; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 459 | nfmsg->version = NFNETLINK_V0; |
| 460 | nfmsg->res_id = htons(queue->queue_num); |
| 461 | |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 462 | nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg)); |
| 463 | pmsg = nla_data(nla); |
| 464 | pmsg->hw_protocol = entskb->protocol; |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 465 | pmsg->hook = entry->state.hook; |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 466 | *packet_id_ptr = &pmsg->packet_id; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 467 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 468 | indev = entry->state.in; |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 469 | if (indev) { |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 470 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 471 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex))) |
| 472 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 473 | #else |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 474 | if (entry->state.pf == PF_BRIDGE) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 475 | /* Case 1: indev is physical input device, we need to |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 476 | * look for bridge group (when called from |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 477 | * netfilter_bridge) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 478 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
| 479 | htonl(indev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 480 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 481 | /* rcu_read_lock()ed by __nf_queue */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 482 | nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
| 483 | htonl(br_port_get_rcu(indev)->br->dev->ifindex))) |
| 484 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 485 | } else { |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 486 | int physinif; |
| 487 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 488 | /* Case 2: indev is bridge group, we need to look for |
| 489 | * physical device (when called from ipv4) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 490 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
| 491 | htonl(indev->ifindex))) |
| 492 | goto nla_put_failure; |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 493 | |
| 494 | physinif = nf_bridge_get_physinif(entskb); |
| 495 | if (physinif && |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 496 | nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 497 | htonl(physinif))) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 498 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 499 | } |
| 500 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Jesper Juhl | 3e4ead4 | 2006-01-05 12:15:58 -0800 | [diff] [blame] | 503 | if (outdev) { |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 504 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 505 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex))) |
| 506 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 507 | #else |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 508 | if (entry->state.pf == PF_BRIDGE) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 509 | /* Case 1: outdev is physical output device, we need to |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 510 | * look for bridge group (when called from |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 511 | * netfilter_bridge) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 512 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
| 513 | htonl(outdev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 514 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 515 | /* rcu_read_lock()ed by __nf_queue */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 516 | nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
| 517 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) |
| 518 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 519 | } else { |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 520 | int physoutif; |
| 521 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 522 | /* Case 2: outdev is bridge group, we need to look for |
| 523 | * physical output device (when called from ipv4) */ |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 524 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
| 525 | htonl(outdev->ifindex))) |
| 526 | goto nla_put_failure; |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 527 | |
| 528 | physoutif = nf_bridge_get_physoutif(entskb); |
| 529 | if (physoutif && |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 530 | nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 531 | htonl(physoutif))) |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 532 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 533 | } |
| 534 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 535 | } |
| 536 | |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 537 | if (entskb->mark && |
| 538 | nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark))) |
| 539 | goto nla_put_failure; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 540 | |
Nicolas Cavallari | 2c38de4 | 2011-06-16 17:27:04 +0200 | [diff] [blame] | 541 | if (indev && entskb->dev && |
| 542 | entskb->mac_header != entskb->network_header) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 543 | struct nfqnl_msg_packet_hw phw; |
Dan Carpenter | e4d091d | 2013-08-01 12:36:57 +0300 | [diff] [blame] | 544 | int len; |
| 545 | |
| 546 | memset(&phw, 0, sizeof(phw)); |
| 547 | len = dev_parse_header(entskb, phw.hw_addr); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 548 | if (len) { |
| 549 | phw.hw_addrlen = htons(len); |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 550 | if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw)) |
| 551 | goto nla_put_failure; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 552 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 553 | } |
| 554 | |
Stephane Bryant | 15824ab | 2016-03-26 08:42:11 +0100 | [diff] [blame] | 555 | if (nfqnl_put_bridge(entry, skb) < 0) |
| 556 | goto nla_put_failure; |
| 557 | |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 558 | if (entskb->tstamp.tv64) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 559 | struct nfqnl_msg_packet_timestamp ts; |
Florian Westphal | a7f1884 | 2016-05-12 14:43:54 +0200 | [diff] [blame] | 560 | struct timespec64 kts = ktime_to_timespec64(entskb->tstamp); |
Pablo Neira Ayuso | b28b1e8 | 2015-10-04 19:38:14 +0200 | [diff] [blame] | 561 | |
| 562 | ts.sec = cpu_to_be64(kts.tv_sec); |
| 563 | ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 564 | |
David S. Miller | a447189 | 2012-03-29 23:27:38 -0400 | [diff] [blame] | 565 | if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts)) |
| 566 | goto nla_put_failure; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 567 | } |
| 568 | |
Valentina Giusti | 08c0cad | 2013-12-20 17:28:53 +0100 | [diff] [blame] | 569 | if ((queue->flags & NFQA_CFG_F_UID_GID) && entskb->sk && |
| 570 | nfqnl_put_sk_uidgid(skb, entskb->sk) < 0) |
| 571 | goto nla_put_failure; |
| 572 | |
Roman Kubiak | ef493bd | 2015-06-12 12:32:57 +0200 | [diff] [blame] | 573 | if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata)) |
| 574 | goto nla_put_failure; |
| 575 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 576 | 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] | 577 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 578 | |
Florian Westphal | 7f87712 | 2013-06-04 22:22:16 +0000 | [diff] [blame] | 579 | if (cap_len > data_len && |
| 580 | nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) |
Pablo Neira Ayuso | 6ee584b | 2012-09-24 14:52:12 +0200 | [diff] [blame] | 581 | goto nla_put_failure; |
| 582 | |
Florian Westphal | 496e4ae | 2013-06-29 14:15:47 +0200 | [diff] [blame] | 583 | if (nfqnl_put_packet_info(skb, entskb, csum_verify)) |
Florian Westphal | 7237190 | 2013-04-19 04:58:26 +0000 | [diff] [blame] | 584 | goto nla_put_failure; |
| 585 | |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 586 | if (data_len) { |
| 587 | struct nlattr *nla; |
| 588 | |
| 589 | if (skb_tailroom(skb) < sizeof(*nla) + hlen) |
| 590 | goto nla_put_failure; |
| 591 | |
| 592 | nla = (struct nlattr *)skb_put(skb, sizeof(*nla)); |
| 593 | nla->nla_type = NFQA_PAYLOAD; |
| 594 | nla->nla_len = nla_attr_size(data_len); |
| 595 | |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 596 | if (skb_zerocopy(skb, entskb, data_len, hlen)) |
| 597 | goto nla_put_failure; |
Eric Dumazet | ae08ce0 | 2013-03-17 17:15:55 +0000 | [diff] [blame] | 598 | } |
| 599 | |
| 600 | nlh->nlmsg_len = skb->len; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 601 | return skb; |
| 602 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 603 | nla_put_failure: |
Zoltan Kiss | 36d5fe6 | 2014-03-26 22:37:45 +0000 | [diff] [blame] | 604 | skb_tx_error(entskb); |
Wei Yongjun | a672995 | 2012-08-28 03:14:15 +0000 | [diff] [blame] | 605 | kfree_skb(skb); |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 606 | net_err_ratelimited("nf_queue: error creating packet message\n"); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 607 | return NULL; |
| 608 | } |
| 609 | |
| 610 | static int |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 611 | __nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue, |
| 612 | struct nf_queue_entry *entry) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 613 | { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 614 | struct sk_buff *nskb; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 615 | int err = -ENOBUFS; |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 616 | __be32 *packet_id_ptr; |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 617 | int failopen = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 618 | |
Gao feng | 7433268 | 2013-09-23 19:20:55 +0800 | [diff] [blame] | 619 | nskb = nfqnl_build_packet_message(net, queue, entry, &packet_id_ptr); |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 620 | if (nskb == NULL) { |
| 621 | err = -ENOMEM; |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 622 | goto err_out; |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 623 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 624 | spin_lock_bh(&queue->lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 625 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 626 | if (queue->queue_total >= queue->queue_maxlen) { |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 627 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
| 628 | failopen = 1; |
| 629 | err = 0; |
| 630 | } else { |
| 631 | queue->queue_dropped++; |
| 632 | net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n", |
| 633 | queue->queue_total); |
| 634 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 635 | goto err_out_free_nskb; |
| 636 | } |
Eric Dumazet | 5863702 | 2011-07-19 11:44:17 +0200 | [diff] [blame] | 637 | entry->id = ++queue->id_sequence; |
| 638 | *packet_id_ptr = htonl(entry->id); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 639 | |
| 640 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 641 | err = nfnetlink_unicast(nskb, net, queue->peer_portid, MSG_DONTWAIT); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 642 | if (err < 0) { |
Pablo Neira Ayuso | 9314011 | 2016-03-23 12:58:01 +0100 | [diff] [blame] | 643 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
| 644 | failopen = 1; |
| 645 | err = 0; |
| 646 | } else { |
| 647 | queue->queue_user_dropped++; |
| 648 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 649 | goto err_out_unlock; |
| 650 | } |
| 651 | |
| 652 | __enqueue_entry(queue, entry); |
| 653 | |
| 654 | spin_unlock_bh(&queue->lock); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 655 | return 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 656 | |
| 657 | err_out_free_nskb: |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 658 | kfree_skb(nskb); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 659 | err_out_unlock: |
| 660 | spin_unlock_bh(&queue->lock); |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 661 | if (failopen) |
| 662 | nf_reinject(entry, NF_ACCEPT); |
Patrick McHardy | 0ef0f46 | 2007-12-05 01:31:01 -0800 | [diff] [blame] | 663 | err_out: |
Florian Westphal | f158508 | 2011-01-18 15:27:28 +0100 | [diff] [blame] | 664 | return err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 667 | static struct nf_queue_entry * |
| 668 | nf_queue_entry_dup(struct nf_queue_entry *e) |
| 669 | { |
| 670 | struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC); |
Florian Westphal | ed78d09 | 2015-10-13 14:33:27 +0200 | [diff] [blame] | 671 | if (entry) |
| 672 | nf_queue_entry_get_refs(entry); |
| 673 | return entry; |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 674 | } |
| 675 | |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 676 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 677 | /* When called from bridge netfilter, skb->data must point to MAC header |
| 678 | * before calling skb_gso_segment(). Else, original MAC header is lost |
| 679 | * and segmented skbs will be sent to wrong destination. |
| 680 | */ |
| 681 | static void nf_bridge_adjust_skb_data(struct sk_buff *skb) |
| 682 | { |
| 683 | if (skb->nf_bridge) |
| 684 | __skb_push(skb, skb->network_header - skb->mac_header); |
| 685 | } |
| 686 | |
| 687 | static void nf_bridge_adjust_segmented_data(struct sk_buff *skb) |
| 688 | { |
| 689 | if (skb->nf_bridge) |
| 690 | __skb_pull(skb, skb->network_header - skb->mac_header); |
| 691 | } |
| 692 | #else |
| 693 | #define nf_bridge_adjust_skb_data(s) do {} while (0) |
| 694 | #define nf_bridge_adjust_segmented_data(s) do {} while (0) |
| 695 | #endif |
| 696 | |
| 697 | static void free_entry(struct nf_queue_entry *entry) |
| 698 | { |
| 699 | nf_queue_entry_release_refs(entry); |
| 700 | kfree(entry); |
| 701 | } |
| 702 | |
| 703 | static int |
| 704 | __nfqnl_enqueue_packet_gso(struct net *net, struct nfqnl_instance *queue, |
| 705 | struct sk_buff *skb, struct nf_queue_entry *entry) |
| 706 | { |
| 707 | int ret = -ENOMEM; |
| 708 | struct nf_queue_entry *entry_seg; |
| 709 | |
| 710 | nf_bridge_adjust_segmented_data(skb); |
| 711 | |
| 712 | if (skb->next == NULL) { /* last packet, no need to copy entry */ |
| 713 | struct sk_buff *gso_skb = entry->skb; |
| 714 | entry->skb = skb; |
| 715 | ret = __nfqnl_enqueue_packet(net, queue, entry); |
| 716 | if (ret) |
| 717 | entry->skb = gso_skb; |
| 718 | return ret; |
| 719 | } |
| 720 | |
| 721 | skb->next = NULL; |
| 722 | |
| 723 | entry_seg = nf_queue_entry_dup(entry); |
| 724 | if (entry_seg) { |
| 725 | entry_seg->skb = skb; |
| 726 | ret = __nfqnl_enqueue_packet(net, queue, entry_seg); |
| 727 | if (ret) |
| 728 | free_entry(entry_seg); |
| 729 | } |
| 730 | return ret; |
| 731 | } |
| 732 | |
| 733 | static int |
| 734 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) |
| 735 | { |
| 736 | unsigned int queued; |
| 737 | struct nfqnl_instance *queue; |
| 738 | struct sk_buff *skb, *segs; |
| 739 | int err = -ENOBUFS; |
Eric W. Biederman | 9dff2c9 | 2015-09-15 20:04:17 -0500 | [diff] [blame] | 740 | struct net *net = entry->state.net; |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 741 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
| 742 | |
| 743 | /* rcu_read_lock()ed by nf_hook_slow() */ |
| 744 | queue = instance_lookup(q, queuenum); |
| 745 | if (!queue) |
| 746 | return -ESRCH; |
| 747 | |
| 748 | if (queue->copy_mode == NFQNL_COPY_NONE) |
| 749 | return -EINVAL; |
| 750 | |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 751 | skb = entry->skb; |
| 752 | |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 753 | switch (entry->state.pf) { |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 754 | case NFPROTO_IPV4: |
| 755 | skb->protocol = htons(ETH_P_IP); |
| 756 | break; |
| 757 | case NFPROTO_IPV6: |
| 758 | skb->protocol = htons(ETH_P_IPV6); |
| 759 | break; |
| 760 | } |
| 761 | |
Pablo Neira Ayuso | 7b8dfe2 | 2013-06-07 18:42:00 +0200 | [diff] [blame] | 762 | if ((queue->flags & NFQA_CFG_F_GSO) || !skb_is_gso(skb)) |
| 763 | return __nfqnl_enqueue_packet(net, queue, entry); |
| 764 | |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 765 | nf_bridge_adjust_skb_data(skb); |
| 766 | segs = skb_gso_segment(skb, 0); |
| 767 | /* 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] | 768 | * returned by nf_queue. For instance, callers rely on -ESRCH to |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 769 | * mean 'ignore this hook'. |
| 770 | */ |
Florian Westphal | 330966e | 2014-10-20 13:49:17 +0200 | [diff] [blame] | 771 | if (IS_ERR_OR_NULL(segs)) |
Florian Westphal | a5fedd43 | 2013-04-19 04:58:25 +0000 | [diff] [blame] | 772 | goto out_err; |
| 773 | queued = 0; |
| 774 | err = 0; |
| 775 | do { |
| 776 | struct sk_buff *nskb = segs->next; |
| 777 | if (err == 0) |
| 778 | err = __nfqnl_enqueue_packet_gso(net, queue, |
| 779 | segs, entry); |
| 780 | if (err == 0) |
| 781 | queued++; |
| 782 | else |
| 783 | kfree_skb(segs); |
| 784 | segs = nskb; |
| 785 | } while (segs); |
| 786 | |
| 787 | if (queued) { |
| 788 | if (err) /* some segments are already queued */ |
| 789 | free_entry(entry); |
| 790 | kfree_skb(skb); |
| 791 | return 0; |
| 792 | } |
| 793 | out_err: |
| 794 | nf_bridge_adjust_segmented_data(skb); |
| 795 | return err; |
| 796 | } |
| 797 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 798 | static int |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 799 | 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] | 800 | { |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 801 | struct sk_buff *nskb; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 802 | |
Patrick McHardy | d8a585d | 2006-11-14 19:48:09 -0800 | [diff] [blame] | 803 | if (diff < 0) { |
| 804 | if (pskb_trim(e->skb, data_len)) |
| 805 | return -ENOMEM; |
| 806 | } else if (diff > 0) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 807 | if (data_len > 0xFFFF) |
| 808 | return -EINVAL; |
| 809 | if (diff > skb_tailroom(e->skb)) { |
Arnaud Ebalard | 9a732ed | 2008-04-29 03:16:34 -0700 | [diff] [blame] | 810 | nskb = skb_copy_expand(e->skb, skb_headroom(e->skb), |
| 811 | diff, GFP_ATOMIC); |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 812 | if (!nskb) { |
Patrick McHardy | 1158ba2 | 2006-08-22 00:32:47 -0700 | [diff] [blame] | 813 | printk(KERN_WARNING "nf_queue: OOM " |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 814 | "in mangle, dropping packet\n"); |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 815 | return -ENOMEM; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 816 | } |
Patrick McHardy | e2b58a6 | 2008-02-19 17:17:52 -0800 | [diff] [blame] | 817 | kfree_skb(e->skb); |
| 818 | e->skb = nskb; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 819 | } |
| 820 | skb_put(e->skb, diff); |
| 821 | } |
Herbert Xu | 37d4187 | 2007-10-14 00:39:18 -0700 | [diff] [blame] | 822 | if (!skb_make_writable(e->skb, data_len)) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 823 | return -ENOMEM; |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 824 | skb_copy_to_linear_data(e->skb, data, data_len); |
Patrick McHardy | e7dfb09 | 2005-09-06 15:10:00 -0700 | [diff] [blame] | 825 | e->skb->ip_summed = CHECKSUM_NONE; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 826 | return 0; |
| 827 | } |
| 828 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 829 | static int |
| 830 | nfqnl_set_mode(struct nfqnl_instance *queue, |
| 831 | unsigned char mode, unsigned int range) |
| 832 | { |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 833 | int status = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 834 | |
| 835 | spin_lock_bh(&queue->lock); |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 836 | switch (mode) { |
| 837 | case NFQNL_COPY_NONE: |
| 838 | case NFQNL_COPY_META: |
| 839 | queue->copy_mode = mode; |
| 840 | queue->copy_range = 0; |
| 841 | break; |
| 842 | |
| 843 | case NFQNL_COPY_PACKET: |
| 844 | queue->copy_mode = mode; |
Florian Westphal | 9cefbbc | 2013-06-04 22:22:15 +0000 | [diff] [blame] | 845 | if (range == 0 || range > NFQNL_MAX_COPY_RANGE) |
| 846 | queue->copy_range = NFQNL_MAX_COPY_RANGE; |
Patrick McHardy | c5de0df | 2007-12-05 01:29:05 -0800 | [diff] [blame] | 847 | else |
| 848 | queue->copy_range = range; |
| 849 | break; |
| 850 | |
| 851 | default: |
| 852 | status = -EINVAL; |
| 853 | |
| 854 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 855 | spin_unlock_bh(&queue->lock); |
| 856 | |
| 857 | return status; |
| 858 | } |
| 859 | |
| 860 | static int |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 861 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 862 | { |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 863 | if (entry->state.in) |
| 864 | if (entry->state.in->ifindex == ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 865 | return 1; |
David S. Miller | 1d1de89 | 2015-04-03 16:31:01 -0400 | [diff] [blame] | 866 | if (entry->state.out) |
| 867 | if (entry->state.out->ifindex == ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 868 | return 1; |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 869 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Patrick McHardy | ef47c6a7 | 2006-06-27 03:01:48 -0700 | [diff] [blame] | 870 | if (entry->skb->nf_bridge) { |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 871 | int physinif, physoutif; |
| 872 | |
| 873 | physinif = nf_bridge_get_physinif(entry->skb); |
| 874 | physoutif = nf_bridge_get_physoutif(entry->skb); |
| 875 | |
| 876 | if (physinif == ifindex || physoutif == ifindex) |
Patrick McHardy | ef47c6a7 | 2006-06-27 03:01:48 -0700 | [diff] [blame] | 877 | return 1; |
| 878 | } |
| 879 | #endif |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 880 | return 0; |
| 881 | } |
| 882 | |
| 883 | /* drop all packets with either indev or outdev == ifindex from all queue |
| 884 | * instances */ |
| 885 | static void |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 886 | nfqnl_dev_drop(struct net *net, int ifindex) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 887 | { |
| 888 | int i; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 889 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 890 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 891 | rcu_read_lock(); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 892 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 893 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 894 | struct nfqnl_instance *inst; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 895 | struct hlist_head *head = &q->instance_table[i]; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 896 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 897 | hlist_for_each_entry_rcu(inst, head, hlist) |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 898 | nfqnl_flush(inst, dev_cmp, ifindex); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 899 | } |
| 900 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 901 | rcu_read_unlock(); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 902 | } |
| 903 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 904 | static int |
| 905 | nfqnl_rcv_dev_event(struct notifier_block *this, |
| 906 | unsigned long event, void *ptr) |
| 907 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 908 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 909 | |
| 910 | /* Drop any packets associated with the downed device */ |
| 911 | if (event == NETDEV_DOWN) |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 912 | nfqnl_dev_drop(dev_net(dev), dev->ifindex); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 913 | return NOTIFY_DONE; |
| 914 | } |
| 915 | |
| 916 | static struct notifier_block nfqnl_dev_notifier = { |
| 917 | .notifier_call = nfqnl_rcv_dev_event, |
| 918 | }; |
| 919 | |
Eric W. Biederman | 8405a8f | 2015-06-19 14:03:39 -0500 | [diff] [blame] | 920 | static int nf_hook_cmp(struct nf_queue_entry *entry, unsigned long ops_ptr) |
| 921 | { |
| 922 | return entry->elem == (struct nf_hook_ops *)ops_ptr; |
| 923 | } |
| 924 | |
| 925 | static void nfqnl_nf_hook_drop(struct net *net, struct nf_hook_ops *hook) |
| 926 | { |
| 927 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
| 928 | int i; |
| 929 | |
| 930 | rcu_read_lock(); |
| 931 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
| 932 | struct nfqnl_instance *inst; |
| 933 | struct hlist_head *head = &q->instance_table[i]; |
| 934 | |
| 935 | hlist_for_each_entry_rcu(inst, head, hlist) |
| 936 | nfqnl_flush(inst, nf_hook_cmp, (unsigned long)hook); |
| 937 | } |
| 938 | rcu_read_unlock(); |
| 939 | } |
| 940 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 941 | static int |
| 942 | nfqnl_rcv_nl_event(struct notifier_block *this, |
| 943 | unsigned long event, void *ptr) |
| 944 | { |
| 945 | struct netlink_notify *n = ptr; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 946 | struct nfnl_queue_net *q = nfnl_queue_pernet(n->net); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 947 | |
Patrick McHardy | dee5817 | 2009-11-06 17:04:00 +0100 | [diff] [blame] | 948 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 949 | int i; |
| 950 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 951 | /* destroy all instances for this portid */ |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 952 | spin_lock(&q->instances_lock); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 953 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 954 | struct hlist_node *t2; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 955 | struct nfqnl_instance *inst; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 956 | struct hlist_head *head = &q->instance_table[i]; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 957 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 958 | hlist_for_each_entry_safe(inst, t2, head, hlist) { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 959 | if (n->portid == inst->peer_portid) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 960 | __instance_destroy(inst); |
| 961 | } |
| 962 | } |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 963 | spin_unlock(&q->instances_lock); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 964 | } |
| 965 | return NOTIFY_DONE; |
| 966 | } |
| 967 | |
| 968 | static struct notifier_block nfqnl_rtnl_notifier = { |
| 969 | .notifier_call = nfqnl_rcv_nl_event, |
| 970 | }; |
| 971 | |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 972 | static const struct nla_policy nfqa_vlan_policy[NFQA_VLAN_MAX + 1] = { |
| 973 | [NFQA_VLAN_TCI] = { .type = NLA_U16}, |
| 974 | [NFQA_VLAN_PROTO] = { .type = NLA_U16}, |
| 975 | }; |
| 976 | |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 977 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
| 978 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, |
| 979 | [NFQA_MARK] = { .type = NLA_U32 }, |
| 980 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 981 | [NFQA_CT] = { .type = NLA_UNSPEC }, |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 982 | [NFQA_EXP] = { .type = NLA_UNSPEC }, |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 983 | [NFQA_VLAN] = { .type = NLA_NESTED }, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 984 | }; |
| 985 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 986 | static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = { |
| 987 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, |
| 988 | [NFQA_MARK] = { .type = NLA_U32 }, |
| 989 | }; |
| 990 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 991 | static struct nfqnl_instance * |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 992 | 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] | 993 | { |
| 994 | struct nfqnl_instance *queue; |
| 995 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 996 | queue = instance_lookup(q, queue_num); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 997 | if (!queue) |
| 998 | return ERR_PTR(-ENODEV); |
| 999 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1000 | if (queue->peer_portid != nlportid) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1001 | return ERR_PTR(-EPERM); |
| 1002 | |
| 1003 | return queue; |
| 1004 | } |
| 1005 | |
| 1006 | static struct nfqnl_msg_verdict_hdr* |
| 1007 | verdicthdr_get(const struct nlattr * const nfqa[]) |
| 1008 | { |
| 1009 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 1010 | unsigned int verdict; |
| 1011 | |
| 1012 | if (!nfqa[NFQA_VERDICT_HDR]) |
| 1013 | return NULL; |
| 1014 | |
| 1015 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); |
Florian Westphal | c667523 | 2011-08-30 15:01:20 +0200 | [diff] [blame] | 1016 | verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK; |
| 1017 | if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1018 | return NULL; |
| 1019 | return vhdr; |
| 1020 | } |
| 1021 | |
| 1022 | static int nfq_id_after(unsigned int id, unsigned int max) |
| 1023 | { |
| 1024 | return (int)(id - max) > 0; |
| 1025 | } |
| 1026 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1027 | static int nfqnl_recv_verdict_batch(struct net *net, struct sock *ctnl, |
| 1028 | struct sk_buff *skb, |
| 1029 | const struct nlmsghdr *nlh, |
| 1030 | const struct nlattr * const nfqa[]) |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1031 | { |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 1032 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1033 | struct nf_queue_entry *entry, *tmp; |
| 1034 | unsigned int verdict, maxid; |
| 1035 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 1036 | struct nfqnl_instance *queue; |
| 1037 | LIST_HEAD(batch_list); |
| 1038 | u16 queue_num = ntohs(nfmsg->res_id); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1039 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
| 1040 | |
| 1041 | queue = verdict_instance_lookup(q, queue_num, |
| 1042 | NETLINK_CB(skb).portid); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1043 | if (IS_ERR(queue)) |
| 1044 | return PTR_ERR(queue); |
| 1045 | |
| 1046 | vhdr = verdicthdr_get(nfqa); |
| 1047 | if (!vhdr) |
| 1048 | return -EINVAL; |
| 1049 | |
| 1050 | verdict = ntohl(vhdr->verdict); |
| 1051 | maxid = ntohl(vhdr->id); |
| 1052 | |
| 1053 | spin_lock_bh(&queue->lock); |
| 1054 | |
| 1055 | list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) { |
| 1056 | if (nfq_id_after(entry->id, maxid)) |
| 1057 | break; |
| 1058 | __dequeue_entry(queue, entry); |
| 1059 | list_add_tail(&entry->list, &batch_list); |
| 1060 | } |
| 1061 | |
| 1062 | spin_unlock_bh(&queue->lock); |
| 1063 | |
| 1064 | if (list_empty(&batch_list)) |
| 1065 | return -ENOENT; |
| 1066 | |
| 1067 | list_for_each_entry_safe(entry, tmp, &batch_list, list) { |
| 1068 | if (nfqa[NFQA_MARK]) |
| 1069 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
| 1070 | nf_reinject(entry, verdict); |
| 1071 | } |
| 1072 | return 0; |
| 1073 | } |
| 1074 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1075 | static struct nf_conn *nfqnl_ct_parse(struct nfnl_ct_hook *nfnl_ct, |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1076 | const struct nlmsghdr *nlh, |
| 1077 | const struct nlattr * const nfqa[], |
| 1078 | struct nf_queue_entry *entry, |
| 1079 | enum ip_conntrack_info *ctinfo) |
| 1080 | { |
| 1081 | struct nf_conn *ct; |
| 1082 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1083 | ct = nfnl_ct->get_ct(entry->skb, ctinfo); |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1084 | if (ct == NULL) |
| 1085 | return NULL; |
| 1086 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1087 | if (nfnl_ct->parse(nfqa[NFQA_CT], ct) < 0) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1088 | return NULL; |
| 1089 | |
| 1090 | if (nfqa[NFQA_EXP]) |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1091 | nfnl_ct->attach_expect(nfqa[NFQA_EXP], ct, |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1092 | NETLINK_CB(entry->skb).portid, |
| 1093 | nlmsg_report(nlh)); |
| 1094 | return ct; |
| 1095 | } |
| 1096 | |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1097 | static int nfqa_parse_bridge(struct nf_queue_entry *entry, |
| 1098 | const struct nlattr * const nfqa[]) |
| 1099 | { |
| 1100 | if (nfqa[NFQA_VLAN]) { |
| 1101 | struct nlattr *tb[NFQA_VLAN_MAX + 1]; |
| 1102 | int err; |
| 1103 | |
| 1104 | err = nla_parse_nested(tb, NFQA_VLAN_MAX, nfqa[NFQA_VLAN], |
| 1105 | nfqa_vlan_policy); |
| 1106 | if (err < 0) |
| 1107 | return err; |
| 1108 | |
| 1109 | if (!tb[NFQA_VLAN_TCI] || !tb[NFQA_VLAN_PROTO]) |
| 1110 | return -EINVAL; |
| 1111 | |
| 1112 | entry->skb->vlan_tci = ntohs(nla_get_be16(tb[NFQA_VLAN_TCI])); |
| 1113 | entry->skb->vlan_proto = nla_get_be16(tb[NFQA_VLAN_PROTO]); |
| 1114 | } |
| 1115 | |
| 1116 | if (nfqa[NFQA_L2HDR]) { |
| 1117 | int mac_header_len = entry->skb->network_header - |
| 1118 | entry->skb->mac_header; |
| 1119 | |
| 1120 | if (mac_header_len != nla_len(nfqa[NFQA_L2HDR])) |
| 1121 | return -EINVAL; |
| 1122 | else if (mac_header_len > 0) |
| 1123 | memcpy(skb_mac_header(entry->skb), |
| 1124 | nla_data(nfqa[NFQA_L2HDR]), |
| 1125 | mac_header_len); |
| 1126 | } |
| 1127 | |
| 1128 | return 0; |
| 1129 | } |
| 1130 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1131 | static int nfqnl_recv_verdict(struct net *net, struct sock *ctnl, |
| 1132 | struct sk_buff *skb, |
| 1133 | const struct nlmsghdr *nlh, |
| 1134 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1135 | { |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 1136 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1137 | u_int16_t queue_num = ntohs(nfmsg->res_id); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1138 | struct nfqnl_msg_verdict_hdr *vhdr; |
| 1139 | struct nfqnl_instance *queue; |
| 1140 | unsigned int verdict; |
Patrick McHardy | 02f014d | 2007-12-05 01:26:33 -0800 | [diff] [blame] | 1141 | struct nf_queue_entry *entry; |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1142 | enum ip_conntrack_info uninitialized_var(ctinfo); |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1143 | struct nfnl_ct_hook *nfnl_ct; |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1144 | struct nf_conn *ct = NULL; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1145 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1146 | int err; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1147 | |
Liping Zhang | 00a3101 | 2016-08-08 22:07:27 +0800 | [diff] [blame] | 1148 | queue = verdict_instance_lookup(q, queue_num, |
| 1149 | NETLINK_CB(skb).portid); |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1150 | if (IS_ERR(queue)) |
| 1151 | return PTR_ERR(queue); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1152 | |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1153 | vhdr = verdicthdr_get(nfqa); |
| 1154 | if (!vhdr) |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 1155 | return -EINVAL; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1156 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1157 | verdict = ntohl(vhdr->verdict); |
| 1158 | |
Patrick McHardy | b43d8d8 | 2007-12-05 01:25:30 -0800 | [diff] [blame] | 1159 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 1160 | if (entry == NULL) |
| 1161 | return -ENOENT; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1162 | |
Arnd Bergmann | 8e66216 | 2015-11-19 13:49:59 +0100 | [diff] [blame] | 1163 | /* rcu lock already held from nfnl->call_rcu. */ |
| 1164 | nfnl_ct = rcu_dereference(nfnl_ct_hook); |
| 1165 | |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 1166 | if (nfqa[NFQA_CT]) { |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1167 | if (nfnl_ct != NULL) |
| 1168 | ct = nfqnl_ct_parse(nfnl_ct, nlh, nfqa, entry, &ctinfo); |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 1169 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 1170 | |
Stephane Bryant | 8d45ff2 | 2016-03-26 08:42:12 +0100 | [diff] [blame] | 1171 | if (entry->state.pf == PF_BRIDGE) { |
| 1172 | err = nfqa_parse_bridge(entry, nfqa); |
| 1173 | if (err < 0) |
| 1174 | return err; |
| 1175 | } |
| 1176 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1177 | if (nfqa[NFQA_PAYLOAD]) { |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1178 | u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]); |
| 1179 | int diff = payload_len - entry->skb->len; |
| 1180 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1181 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1182 | payload_len, entry, diff) < 0) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1183 | verdict = NF_DROP; |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 1184 | |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 1185 | if (ct && diff) |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 1186 | nfnl_ct->seq_adjust(entry->skb, ct, ctinfo, diff); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1187 | } |
| 1188 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1189 | if (nfqa[NFQA_MARK]) |
Patrick McHardy | ea3a66f | 2007-12-05 01:30:02 -0800 | [diff] [blame] | 1190 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1191 | |
Patrick McHardy | 4b3d15e | 2007-12-05 01:27:02 -0800 | [diff] [blame] | 1192 | nf_reinject(entry, verdict); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1193 | return 0; |
| 1194 | } |
| 1195 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1196 | static int nfqnl_recv_unsupp(struct net *net, struct sock *ctnl, |
| 1197 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 1198 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1199 | { |
| 1200 | return -ENOTSUPP; |
| 1201 | } |
| 1202 | |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 1203 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
| 1204 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, |
| 1205 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1206 | }; |
| 1207 | |
Patrick McHardy | e3ac529 | 2007-12-05 01:23:57 -0800 | [diff] [blame] | 1208 | static const struct nf_queue_handler nfqh = { |
Eric W. Biederman | 8405a8f | 2015-06-19 14:03:39 -0500 | [diff] [blame] | 1209 | .outfn = &nfqnl_enqueue_packet, |
| 1210 | .nf_hook_drop = &nfqnl_nf_hook_drop, |
Harald Welte | bbd86b9f | 2005-08-09 20:23:11 -0700 | [diff] [blame] | 1211 | }; |
| 1212 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1213 | static int nfqnl_recv_config(struct net *net, struct sock *ctnl, |
| 1214 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 1215 | const struct nlattr * const nfqa[]) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1216 | { |
David S. Miller | 3da07c0 | 2012-06-26 21:35:27 -0700 | [diff] [blame] | 1217 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1218 | u_int16_t queue_num = ntohs(nfmsg->res_id); |
| 1219 | struct nfqnl_instance *queue; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1220 | struct nfqnl_msg_config_cmd *cmd = NULL; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1221 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1222 | __u32 flags = 0, mask = 0; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1223 | int ret = 0; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1224 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1225 | if (nfqa[NFQA_CFG_CMD]) { |
| 1226 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); |
| 1227 | |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 1228 | /* Obsolete commands without queue context */ |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1229 | switch (cmd->command) { |
Florian Westphal | 0360ae4 | 2012-11-23 06:22:21 +0000 | [diff] [blame] | 1230 | case NFQNL_CFG_CMD_PF_BIND: return 0; |
| 1231 | case NFQNL_CFG_CMD_PF_UNBIND: return 0; |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1232 | } |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 1233 | } |
| 1234 | |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1235 | /* Check if we support these flags in first place, dependencies should |
| 1236 | * be there too not to break atomicity. |
| 1237 | */ |
| 1238 | if (nfqa[NFQA_CFG_FLAGS]) { |
| 1239 | if (!nfqa[NFQA_CFG_MASK]) { |
| 1240 | /* A mask is needed to specify which flags are being |
| 1241 | * changed. |
| 1242 | */ |
| 1243 | return -EINVAL; |
| 1244 | } |
| 1245 | |
| 1246 | flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS])); |
| 1247 | mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK])); |
| 1248 | |
| 1249 | if (flags >= NFQA_CFG_F_MAX) |
| 1250 | return -EOPNOTSUPP; |
| 1251 | |
| 1252 | #if !IS_ENABLED(CONFIG_NETWORK_SECMARK) |
| 1253 | if (flags & mask & NFQA_CFG_F_SECCTX) |
| 1254 | return -EOPNOTSUPP; |
| 1255 | #endif |
Ken-ichirou MATSUZAWA | 71b2e5f | 2016-01-05 09:32:59 +0900 | [diff] [blame] | 1256 | if ((flags & mask & NFQA_CFG_F_CONNTRACK) && |
| 1257 | !rcu_access_pointer(nfnl_ct_hook)) { |
| 1258 | #ifdef CONFIG_MODULES |
| 1259 | nfnl_unlock(NFNL_SUBSYS_QUEUE); |
| 1260 | request_module("ip_conntrack_netlink"); |
| 1261 | nfnl_lock(NFNL_SUBSYS_QUEUE); |
| 1262 | if (rcu_access_pointer(nfnl_ct_hook)) |
| 1263 | return -EAGAIN; |
| 1264 | #endif |
| 1265 | return -EOPNOTSUPP; |
| 1266 | } |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1267 | } |
| 1268 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1269 | rcu_read_lock(); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1270 | queue = instance_lookup(q, queue_num); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1271 | if (queue && queue->peer_portid != NETLINK_CB(skb).portid) { |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1272 | ret = -EPERM; |
| 1273 | goto err_out_unlock; |
| 1274 | } |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 1275 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1276 | if (cmd != NULL) { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1277 | switch (cmd->command) { |
| 1278 | case NFQNL_CFG_CMD_BIND: |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1279 | if (queue) { |
| 1280 | ret = -EBUSY; |
| 1281 | goto err_out_unlock; |
| 1282 | } |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1283 | queue = instance_create(q, queue_num, |
| 1284 | NETLINK_CB(skb).portid); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 1285 | if (IS_ERR(queue)) { |
| 1286 | ret = PTR_ERR(queue); |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1287 | goto err_out_unlock; |
| 1288 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1289 | break; |
| 1290 | case NFQNL_CFG_CMD_UNBIND: |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1291 | if (!queue) { |
| 1292 | ret = -ENODEV; |
| 1293 | goto err_out_unlock; |
| 1294 | } |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1295 | instance_destroy(q, queue); |
Ken-ichirou MATSUZAWA | 17bc6b4 | 2016-01-05 09:29:54 +0900 | [diff] [blame] | 1296 | goto err_out_unlock; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1297 | case NFQNL_CFG_CMD_PF_BIND: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1298 | case NFQNL_CFG_CMD_PF_UNBIND: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1299 | break; |
| 1300 | default: |
Patrick McHardy | cd21f0a | 2007-12-17 22:40:19 -0800 | [diff] [blame] | 1301 | ret = -ENOTSUPP; |
Ken-ichirou MATSUZAWA | 21c3c97 | 2016-01-05 09:31:40 +0900 | [diff] [blame] | 1302 | goto err_out_unlock; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1303 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1304 | } |
| 1305 | |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1306 | if (!queue) { |
| 1307 | ret = -ENODEV; |
| 1308 | goto err_out_unlock; |
| 1309 | } |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1310 | |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1311 | if (nfqa[NFQA_CFG_PARAMS]) { |
| 1312 | struct nfqnl_msg_config_params *params = |
| 1313 | nla_data(nfqa[NFQA_CFG_PARAMS]); |
| 1314 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1315 | nfqnl_set_mode(queue, params->copy_mode, |
| 1316 | ntohl(params->copy_range)); |
| 1317 | } |
| 1318 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1319 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
Ken-ichirou MATSUZAWA | 60d2c7f | 2016-01-05 09:28:05 +0900 | [diff] [blame] | 1320 | __be32 *queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
Patrick McHardy | a3c8e7fd | 2007-12-05 01:28:30 -0800 | [diff] [blame] | 1321 | |
Eric Leblond | 829e17a | 2006-11-29 02:35:33 +0100 | [diff] [blame] | 1322 | spin_lock_bh(&queue->lock); |
| 1323 | queue->queue_maxlen = ntohl(*queue_maxlen); |
| 1324 | spin_unlock_bh(&queue->lock); |
| 1325 | } |
| 1326 | |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 1327 | if (nfqa[NFQA_CFG_FLAGS]) { |
Krishna Kumar | fdb694a | 2012-05-24 03:56:44 +0000 | [diff] [blame] | 1328 | spin_lock_bh(&queue->lock); |
| 1329 | queue->flags &= ~mask; |
| 1330 | queue->flags |= flags & mask; |
| 1331 | spin_unlock_bh(&queue->lock); |
| 1332 | } |
| 1333 | |
Patrick McHardy | 9872bec | 2007-12-05 01:28:50 -0800 | [diff] [blame] | 1334 | err_out_unlock: |
| 1335 | rcu_read_unlock(); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1336 | return ret; |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1337 | } |
| 1338 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1339 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 1340 | [NFQNL_MSG_PACKET] = { .call_rcu = nfqnl_recv_unsupp, |
Harald Welte | 37d2e7a | 2005-11-14 15:24:59 -0800 | [diff] [blame] | 1341 | .attr_count = NFQA_MAX, }, |
Eric Dumazet | 84a797d | 2011-07-18 16:08:27 +0200 | [diff] [blame] | 1342 | [NFQNL_MSG_VERDICT] = { .call_rcu = nfqnl_recv_verdict, |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 1343 | .attr_count = NFQA_MAX, |
| 1344 | .policy = nfqa_verdict_policy }, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1345 | [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config, |
Patrick McHardy | 5bf7585 | 2007-09-28 14:39:26 -0700 | [diff] [blame] | 1346 | .attr_count = NFQA_CFG_MAX, |
| 1347 | .policy = nfqa_cfg_policy }, |
Florian Westphal | 97d32cf | 2011-07-19 11:46:33 +0200 | [diff] [blame] | 1348 | [NFQNL_MSG_VERDICT_BATCH]={ .call_rcu = nfqnl_recv_verdict_batch, |
| 1349 | .attr_count = NFQA_MAX, |
| 1350 | .policy = nfqa_verdict_batch_policy }, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1351 | }; |
| 1352 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1353 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1354 | .name = "nf_queue", |
| 1355 | .subsys_id = NFNL_SUBSYS_QUEUE, |
| 1356 | .cb_count = NFQNL_MSG_MAX, |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1357 | .cb = nfqnl_cb, |
| 1358 | }; |
| 1359 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1360 | #ifdef CONFIG_PROC_FS |
| 1361 | struct iter_state { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1362 | struct seq_net_private p; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1363 | unsigned int bucket; |
| 1364 | }; |
| 1365 | |
| 1366 | static struct hlist_node *get_first(struct seq_file *seq) |
| 1367 | { |
| 1368 | struct iter_state *st = seq->private; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1369 | struct net *net; |
| 1370 | struct nfnl_queue_net *q; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1371 | |
| 1372 | if (!st) |
| 1373 | return NULL; |
| 1374 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1375 | net = seq_file_net(seq); |
| 1376 | q = nfnl_queue_pernet(net); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1377 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1378 | if (!hlist_empty(&q->instance_table[st->bucket])) |
| 1379 | return q->instance_table[st->bucket].first; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1380 | } |
| 1381 | return NULL; |
| 1382 | } |
| 1383 | |
| 1384 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) |
| 1385 | { |
| 1386 | struct iter_state *st = seq->private; |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1387 | struct net *net = seq_file_net(seq); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1388 | |
| 1389 | h = h->next; |
| 1390 | while (!h) { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1391 | struct nfnl_queue_net *q; |
| 1392 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1393 | if (++st->bucket >= INSTANCE_BUCKETS) |
| 1394 | return NULL; |
| 1395 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1396 | q = nfnl_queue_pernet(net); |
| 1397 | h = q->instance_table[st->bucket].first; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1398 | } |
| 1399 | return h; |
| 1400 | } |
| 1401 | |
| 1402 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) |
| 1403 | { |
| 1404 | struct hlist_node *head; |
| 1405 | head = get_first(seq); |
| 1406 | |
| 1407 | if (head) |
| 1408 | while (pos && (head = get_next(seq, head))) |
| 1409 | pos--; |
| 1410 | return pos ? NULL : head; |
| 1411 | } |
| 1412 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1413 | static void *seq_start(struct seq_file *s, loff_t *pos) |
| 1414 | __acquires(nfnl_queue_pernet(seq_file_net(s))->instances_lock) |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1415 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1416 | spin_lock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
| 1417 | return get_idx(s, *pos); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1418 | } |
| 1419 | |
| 1420 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 1421 | { |
| 1422 | (*pos)++; |
| 1423 | return get_next(s, v); |
| 1424 | } |
| 1425 | |
| 1426 | static void seq_stop(struct seq_file *s, void *v) |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1427 | __releases(nfnl_queue_pernet(seq_file_net(s))->instances_lock) |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1428 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1429 | spin_unlock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1430 | } |
| 1431 | |
| 1432 | static int seq_show(struct seq_file *s, void *v) |
| 1433 | { |
| 1434 | const struct nfqnl_instance *inst = v; |
| 1435 | |
Richard Weinberger | 6b46f7b | 2015-04-13 00:52:38 +0200 | [diff] [blame] | 1436 | seq_printf(s, "%5u %6u %5u %1u %5u %5u %5u %8u %2d\n", |
Steven Rostedt (Red Hat) | e71456a | 2014-10-27 17:43:45 -0400 | [diff] [blame] | 1437 | inst->queue_num, |
| 1438 | inst->peer_portid, inst->queue_total, |
| 1439 | inst->copy_mode, inst->copy_range, |
| 1440 | inst->queue_dropped, inst->queue_user_dropped, |
| 1441 | inst->id_sequence, 1); |
Joe Perches | 861fb10 | 2015-05-12 18:28:23 -0700 | [diff] [blame] | 1442 | return 0; |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1443 | } |
| 1444 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1445 | static const struct seq_operations nfqnl_seq_ops = { |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1446 | .start = seq_start, |
| 1447 | .next = seq_next, |
| 1448 | .stop = seq_stop, |
| 1449 | .show = seq_show, |
| 1450 | }; |
| 1451 | |
| 1452 | static int nfqnl_open(struct inode *inode, struct file *file) |
| 1453 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1454 | return seq_open_net(inode, file, &nfqnl_seq_ops, |
Pavel Emelyanov | e2da591 | 2007-10-10 02:29:58 -0700 | [diff] [blame] | 1455 | sizeof(struct iter_state)); |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1456 | } |
| 1457 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 1458 | static const struct file_operations nfqnl_file_ops = { |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1459 | .owner = THIS_MODULE, |
| 1460 | .open = nfqnl_open, |
| 1461 | .read = seq_read, |
| 1462 | .llseek = seq_lseek, |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1463 | .release = seq_release_net, |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1464 | }; |
| 1465 | |
| 1466 | #endif /* PROC_FS */ |
| 1467 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1468 | static int __net_init nfnl_queue_net_init(struct net *net) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1469 | { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1470 | unsigned int i; |
| 1471 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1472 | |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1473 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1474 | INIT_HLIST_HEAD(&q->instance_table[i]); |
| 1475 | |
| 1476 | spin_lock_init(&q->instances_lock); |
| 1477 | |
| 1478 | #ifdef CONFIG_PROC_FS |
| 1479 | if (!proc_create("nfnetlink_queue", 0440, |
| 1480 | net->nf.proc_netfilter, &nfqnl_file_ops)) |
| 1481 | return -ENOMEM; |
| 1482 | #endif |
Eric W. Biederman | dc3ee32 | 2016-05-13 21:18:52 -0500 | [diff] [blame] | 1483 | nf_register_queue_handler(net, &nfqh); |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1484 | return 0; |
| 1485 | } |
| 1486 | |
| 1487 | static void __net_exit nfnl_queue_net_exit(struct net *net) |
| 1488 | { |
Eric W. Biederman | dc3ee32 | 2016-05-13 21:18:52 -0500 | [diff] [blame] | 1489 | nf_unregister_queue_handler(net); |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1490 | #ifdef CONFIG_PROC_FS |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1491 | remove_proc_entry("nfnetlink_queue", net->nf.proc_netfilter); |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1492 | #endif |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1493 | } |
| 1494 | |
Eric W. Biederman | dc3ee32 | 2016-05-13 21:18:52 -0500 | [diff] [blame] | 1495 | static void nfnl_queue_net_exit_batch(struct list_head *net_exit_list) |
| 1496 | { |
| 1497 | synchronize_rcu(); |
| 1498 | } |
| 1499 | |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1500 | static struct pernet_operations nfnl_queue_net_ops = { |
Eric W. Biederman | dc3ee32 | 2016-05-13 21:18:52 -0500 | [diff] [blame] | 1501 | .init = nfnl_queue_net_init, |
| 1502 | .exit = nfnl_queue_net_exit, |
| 1503 | .exit_batch = nfnl_queue_net_exit_batch, |
| 1504 | .id = &nfnl_queue_net_id, |
| 1505 | .size = sizeof(struct nfnl_queue_net), |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1506 | }; |
| 1507 | |
| 1508 | static int __init nfnetlink_queue_init(void) |
| 1509 | { |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1510 | int status; |
| 1511 | |
| 1512 | status = register_pernet_subsys(&nfnl_queue_net_ops); |
| 1513 | if (status < 0) { |
| 1514 | pr_err("nf_queue: failed to register pernet ops\n"); |
| 1515 | goto out; |
| 1516 | } |
Harald Welte | 838ab63 | 2005-08-09 19:50:45 -0700 | [diff] [blame] | 1517 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1518 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
| 1519 | status = nfnetlink_subsys_register(&nfqnl_subsys); |
| 1520 | if (status < 0) { |
Gao feng | e817961 | 2013-03-24 23:50:47 +0000 | [diff] [blame] | 1521 | pr_err("nf_queue: failed to create netlink socket\n"); |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1522 | goto cleanup_netlink_notifier; |
| 1523 | } |
| 1524 | |
| 1525 | register_netdevice_notifier(&nfqnl_dev_notifier); |
| 1526 | return status; |
| 1527 | |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1528 | cleanup_netlink_notifier: |
| 1529 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); |
Nikolay Borisov | 639e077 | 2015-12-07 12:13:26 +0200 | [diff] [blame] | 1530 | unregister_pernet_subsys(&nfnl_queue_net_ops); |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1531 | out: |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1532 | return status; |
| 1533 | } |
| 1534 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1535 | static void __exit nfnetlink_queue_fini(void) |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1536 | { |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1537 | unregister_netdevice_notifier(&nfqnl_dev_notifier); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1538 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
| 1539 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1540 | unregister_pernet_subsys(&nfnl_queue_net_ops); |
Jesper Dangaard Brouer | 67137f3 | 2009-06-08 03:11:33 +0000 | [diff] [blame] | 1541 | |
| 1542 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Harald Welte | 7af4cc3 | 2005-08-09 19:44:15 -0700 | [diff] [blame] | 1543 | } |
| 1544 | |
| 1545 | MODULE_DESCRIPTION("netfilter packet queue handler"); |
| 1546 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 1547 | MODULE_LICENSE("GPL"); |
| 1548 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); |
| 1549 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1550 | module_init(nfnetlink_queue_init); |
| 1551 | module_exit(nfnetlink_queue_fini); |