Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
7af4cc3f HW |
2 | /* |
3 | * This is a module which is used for queueing packets and communicating with | |
67137f3c | 4 | * userspace via nfnetlink. |
7af4cc3f HW |
5 | * |
6 | * (C) 2005 by Harald Welte <laforge@netfilter.org> | |
4ad9d4fa | 7 | * (C) 2007 by Patrick McHardy <kaber@trash.net> |
7af4cc3f HW |
8 | * |
9 | * Based on the old ipv4-only ip_queue.c: | |
10 | * (C) 2000-2002 James Morris <jmorris@intercode.com.au> | |
11 | * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org> | |
7af4cc3f | 12 | */ |
5191d70f AS |
13 | |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
15 | ||
7af4cc3f HW |
16 | #include <linux/module.h> |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/spinlock.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
7af4cc3f HW |
21 | #include <linux/notifier.h> |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/netfilter.h> | |
838ab636 | 24 | #include <linux/proc_fs.h> |
7af4cc3f HW |
25 | #include <linux/netfilter_ipv4.h> |
26 | #include <linux/netfilter_ipv6.h> | |
c737b7c4 | 27 | #include <linux/netfilter_bridge.h> |
7af4cc3f HW |
28 | #include <linux/netfilter/nfnetlink.h> |
29 | #include <linux/netfilter/nfnetlink_queue.h> | |
b7bd1809 | 30 | #include <linux/netfilter/nf_conntrack_common.h> |
7af4cc3f | 31 | #include <linux/list.h> |
28c1b6df | 32 | #include <linux/cgroup-defs.h> |
7af4cc3f | 33 | #include <net/sock.h> |
83111e7f | 34 | #include <net/tcp_states.h> |
c01cd429 | 35 | #include <net/netfilter/nf_queue.h> |
e8179610 | 36 | #include <net/netns/generic.h> |
7af4cc3f | 37 | |
60063497 | 38 | #include <linux/atomic.h> |
7af4cc3f | 39 | |
1109a90c | 40 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
fbcd923c HW |
41 | #include "../bridge/br_private.h" |
42 | #endif | |
43 | ||
5da773a3 FW |
44 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
45 | #include <net/netfilter/nf_conntrack.h> | |
46 | #endif | |
47 | ||
7af4cc3f HW |
48 | #define NFQNL_QMAX_DEFAULT 1024 |
49 | ||
9cefbbc9 FW |
50 | /* We're using struct nlattr which has 16bit nla_len. Note that nla_len |
51 | * includes the header length. Thus, the maximum packet length that we | |
52 | * support is 65531 bytes. We send truncated packets if the specified length | |
53 | * is larger than that. Userspace can check for presence of NFQA_CAP_LEN | |
54 | * attribute to detect truncation. | |
55 | */ | |
56 | #define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN) | |
57 | ||
7af4cc3f HW |
58 | struct nfqnl_instance { |
59 | struct hlist_node hlist; /* global list of queues */ | |
9872bec7 | 60 | struct rcu_head rcu; |
7af4cc3f | 61 | |
cc6bc448 | 62 | u32 peer_portid; |
7af4cc3f HW |
63 | unsigned int queue_maxlen; |
64 | unsigned int copy_range; | |
7af4cc3f HW |
65 | unsigned int queue_dropped; |
66 | unsigned int queue_user_dropped; | |
67 | ||
7af4cc3f HW |
68 | |
69 | u_int16_t queue_num; /* number of this queue */ | |
70 | u_int8_t copy_mode; | |
fdb694a0 | 71 | u_int32_t flags; /* Set using NFQA_CFG_FLAGS */ |
c463ac97 ED |
72 | /* |
73 | * Following fields are dirtied for each queued packet, | |
74 | * keep them in same cache line if possible. | |
75 | */ | |
886bc503 | 76 | spinlock_t lock ____cacheline_aligned_in_smp; |
c463ac97 | 77 | unsigned int queue_total; |
5863702a | 78 | unsigned int id_sequence; /* 'sequence' of pkt ids */ |
7af4cc3f HW |
79 | struct list_head queue_list; /* packets in queue */ |
80 | }; | |
81 | ||
02f014d8 | 82 | typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long); |
7af4cc3f | 83 | |
c7d03a00 | 84 | static unsigned int nfnl_queue_net_id __read_mostly; |
7af4cc3f | 85 | |
7af4cc3f | 86 | #define INSTANCE_BUCKETS 16 |
e8179610 G |
87 | struct nfnl_queue_net { |
88 | spinlock_t instances_lock; | |
89 | struct hlist_head instance_table[INSTANCE_BUCKETS]; | |
90 | }; | |
91 | ||
92 | static struct nfnl_queue_net *nfnl_queue_pernet(struct net *net) | |
93 | { | |
94 | return net_generic(net, nfnl_queue_net_id); | |
95 | } | |
7af4cc3f HW |
96 | |
97 | static inline u_int8_t instance_hashfn(u_int16_t queue_num) | |
98 | { | |
1cdb0905 | 99 | return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS; |
7af4cc3f HW |
100 | } |
101 | ||
102 | static struct nfqnl_instance * | |
e8179610 | 103 | instance_lookup(struct nfnl_queue_net *q, u_int16_t queue_num) |
7af4cc3f HW |
104 | { |
105 | struct hlist_head *head; | |
7af4cc3f HW |
106 | struct nfqnl_instance *inst; |
107 | ||
e8179610 | 108 | head = &q->instance_table[instance_hashfn(queue_num)]; |
b67bfe0d | 109 | hlist_for_each_entry_rcu(inst, head, hlist) { |
7af4cc3f HW |
110 | if (inst->queue_num == queue_num) |
111 | return inst; | |
112 | } | |
113 | return NULL; | |
114 | } | |
115 | ||
7af4cc3f | 116 | static struct nfqnl_instance * |
cc6bc448 | 117 | instance_create(struct nfnl_queue_net *q, u_int16_t queue_num, u32 portid) |
7af4cc3f | 118 | { |
baab2ce7 | 119 | struct nfqnl_instance *inst; |
9872bec7 | 120 | unsigned int h; |
baab2ce7 | 121 | int err; |
7af4cc3f | 122 | |
e8179610 G |
123 | spin_lock(&q->instances_lock); |
124 | if (instance_lookup(q, queue_num)) { | |
baab2ce7 | 125 | err = -EEXIST; |
7af4cc3f | 126 | goto out_unlock; |
baab2ce7 | 127 | } |
7af4cc3f | 128 | |
10dfdc69 | 129 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
baab2ce7 PM |
130 | if (!inst) { |
131 | err = -ENOMEM; | |
7af4cc3f | 132 | goto out_unlock; |
baab2ce7 | 133 | } |
7af4cc3f | 134 | |
7af4cc3f | 135 | inst->queue_num = queue_num; |
15e47304 | 136 | inst->peer_portid = portid; |
7af4cc3f | 137 | inst->queue_maxlen = NFQNL_QMAX_DEFAULT; |
9cefbbc9 | 138 | inst->copy_range = NFQNL_MAX_COPY_RANGE; |
7af4cc3f | 139 | inst->copy_mode = NFQNL_COPY_NONE; |
181a46a5 | 140 | spin_lock_init(&inst->lock); |
7af4cc3f HW |
141 | INIT_LIST_HEAD(&inst->queue_list); |
142 | ||
baab2ce7 PM |
143 | if (!try_module_get(THIS_MODULE)) { |
144 | err = -EAGAIN; | |
7af4cc3f | 145 | goto out_free; |
baab2ce7 | 146 | } |
7af4cc3f | 147 | |
9872bec7 | 148 | h = instance_hashfn(queue_num); |
e8179610 | 149 | hlist_add_head_rcu(&inst->hlist, &q->instance_table[h]); |
7af4cc3f | 150 | |
e8179610 | 151 | spin_unlock(&q->instances_lock); |
7af4cc3f | 152 | |
7af4cc3f HW |
153 | return inst; |
154 | ||
155 | out_free: | |
156 | kfree(inst); | |
157 | out_unlock: | |
e8179610 | 158 | spin_unlock(&q->instances_lock); |
baab2ce7 | 159 | return ERR_PTR(err); |
7af4cc3f HW |
160 | } |
161 | ||
b43d8d85 PM |
162 | static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, |
163 | unsigned long data); | |
7af4cc3f HW |
164 | |
165 | static void | |
9872bec7 | 166 | instance_destroy_rcu(struct rcu_head *head) |
7af4cc3f | 167 | { |
9872bec7 PM |
168 | struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance, |
169 | rcu); | |
7af4cc3f | 170 | |
b43d8d85 | 171 | nfqnl_flush(inst, NULL, 0); |
9872bec7 | 172 | kfree(inst); |
7af4cc3f HW |
173 | module_put(THIS_MODULE); |
174 | } | |
175 | ||
9872bec7 | 176 | static void |
7af4cc3f HW |
177 | __instance_destroy(struct nfqnl_instance *inst) |
178 | { | |
9872bec7 PM |
179 | hlist_del_rcu(&inst->hlist); |
180 | call_rcu(&inst->rcu, instance_destroy_rcu); | |
7af4cc3f HW |
181 | } |
182 | ||
9872bec7 | 183 | static void |
e8179610 | 184 | instance_destroy(struct nfnl_queue_net *q, struct nfqnl_instance *inst) |
7af4cc3f | 185 | { |
e8179610 | 186 | spin_lock(&q->instances_lock); |
9872bec7 | 187 | __instance_destroy(inst); |
e8179610 | 188 | spin_unlock(&q->instances_lock); |
7af4cc3f HW |
189 | } |
190 | ||
7af4cc3f | 191 | static inline void |
02f014d8 | 192 | __enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) |
7af4cc3f | 193 | { |
0ac41e81 | 194 | list_add_tail(&entry->list, &queue->queue_list); |
7af4cc3f HW |
195 | queue->queue_total++; |
196 | } | |
197 | ||
97d32cf9 FW |
198 | static void |
199 | __dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry) | |
200 | { | |
201 | list_del(&entry->list); | |
202 | queue->queue_total--; | |
203 | } | |
204 | ||
02f014d8 | 205 | static struct nf_queue_entry * |
b43d8d85 | 206 | find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id) |
7af4cc3f | 207 | { |
02f014d8 | 208 | struct nf_queue_entry *entry = NULL, *i; |
601e68e1 | 209 | |
7af4cc3f | 210 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
211 | |
212 | list_for_each_entry(i, &queue->queue_list, list) { | |
213 | if (i->id == id) { | |
214 | entry = i; | |
215 | break; | |
216 | } | |
217 | } | |
218 | ||
97d32cf9 FW |
219 | if (entry) |
220 | __dequeue_entry(queue, entry); | |
b43d8d85 | 221 | |
7af4cc3f HW |
222 | spin_unlock_bh(&queue->lock); |
223 | ||
224 | return entry; | |
225 | } | |
226 | ||
368982cd PNA |
227 | static void nfqnl_reinject(struct nf_queue_entry *entry, unsigned int verdict) |
228 | { | |
285c8a7a | 229 | const struct nf_ct_hook *ct_hook; |
368982cd PNA |
230 | int err; |
231 | ||
232 | if (verdict == NF_ACCEPT || | |
ad18d7bf | 233 | verdict == NF_REPEAT || |
368982cd PNA |
234 | verdict == NF_STOP) { |
235 | rcu_read_lock(); | |
236 | ct_hook = rcu_dereference(nf_ct_hook); | |
237 | if (ct_hook) { | |
238 | err = ct_hook->update(entry->state.net, entry->skb); | |
239 | if (err < 0) | |
240 | verdict = NF_DROP; | |
241 | } | |
242 | rcu_read_unlock(); | |
243 | } | |
244 | nf_reinject(entry, verdict); | |
245 | } | |
246 | ||
7af4cc3f | 247 | static void |
b43d8d85 | 248 | nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data) |
7af4cc3f | 249 | { |
02f014d8 | 250 | struct nf_queue_entry *entry, *next; |
b43d8d85 | 251 | |
7af4cc3f | 252 | spin_lock_bh(&queue->lock); |
b43d8d85 PM |
253 | list_for_each_entry_safe(entry, next, &queue->queue_list, list) { |
254 | if (!cmpfn || cmpfn(entry, data)) { | |
255 | list_del(&entry->list); | |
256 | queue->queue_total--; | |
368982cd | 257 | nfqnl_reinject(entry, NF_DROP); |
b43d8d85 PM |
258 | } |
259 | } | |
7af4cc3f HW |
260 | spin_unlock_bh(&queue->lock); |
261 | } | |
262 | ||
496e4ae7 FW |
263 | static int |
264 | nfqnl_put_packet_info(struct sk_buff *nlskb, struct sk_buff *packet, | |
265 | bool csum_verify) | |
7237190d FW |
266 | { |
267 | __u32 flags = 0; | |
268 | ||
269 | if (packet->ip_summed == CHECKSUM_PARTIAL) | |
270 | flags = NFQA_SKB_CSUMNOTREADY; | |
496e4ae7 FW |
271 | else if (csum_verify) |
272 | flags = NFQA_SKB_CSUM_NOTVERIFIED; | |
273 | ||
7237190d FW |
274 | if (skb_is_gso(packet)) |
275 | flags |= NFQA_SKB_GSO; | |
276 | ||
277 | return flags ? nla_put_be32(nlskb, NFQA_SKB_INFO, htonl(flags)) : 0; | |
278 | } | |
279 | ||
08c0cad6 VG |
280 | static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk) |
281 | { | |
282 | const struct cred *cred; | |
283 | ||
a8399231 | 284 | if (!sk_fullsock(sk)) |
08c0cad6 VG |
285 | return 0; |
286 | ||
287 | read_lock_bh(&sk->sk_callback_lock); | |
288 | if (sk->sk_socket && sk->sk_socket->file) { | |
289 | cred = sk->sk_socket->file->f_cred; | |
290 | if (nla_put_be32(skb, NFQA_UID, | |
291 | htonl(from_kuid_munged(&init_user_ns, cred->fsuid)))) | |
292 | goto nla_put_failure; | |
293 | if (nla_put_be32(skb, NFQA_GID, | |
294 | htonl(from_kgid_munged(&init_user_ns, cred->fsgid)))) | |
295 | goto nla_put_failure; | |
296 | } | |
297 | read_unlock_bh(&sk->sk_callback_lock); | |
298 | return 0; | |
299 | ||
300 | nla_put_failure: | |
301 | read_unlock_bh(&sk->sk_callback_lock); | |
302 | return -1; | |
303 | } | |
304 | ||
28c1b6df ES |
305 | static int nfqnl_put_sk_classid(struct sk_buff *skb, struct sock *sk) |
306 | { | |
307 | #if IS_ENABLED(CONFIG_CGROUP_NET_CLASSID) | |
308 | if (sk && sk_fullsock(sk)) { | |
309 | u32 classid = sock_cgroup_classid(&sk->sk_cgrp_data); | |
310 | ||
311 | if (classid && nla_put_be32(skb, NFQA_CGROUP_CLASSID, htonl(classid))) | |
312 | return -1; | |
313 | } | |
314 | #endif | |
315 | return 0; | |
316 | } | |
317 | ||
ef493bd9 RK |
318 | static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata) |
319 | { | |
320 | u32 seclen = 0; | |
321 | #if IS_ENABLED(CONFIG_NETWORK_SECMARK) | |
322 | if (!skb || !sk_fullsock(skb->sk)) | |
323 | return 0; | |
324 | ||
325 | read_lock_bh(&skb->sk->sk_callback_lock); | |
326 | ||
327 | if (skb->secmark) | |
328 | security_secid_to_secctx(skb->secmark, secdata, &seclen); | |
329 | ||
330 | read_unlock_bh(&skb->sk->sk_callback_lock); | |
331 | #endif | |
332 | return seclen; | |
333 | } | |
334 | ||
15824ab2 SB |
335 | static u32 nfqnl_get_bridge_size(struct nf_queue_entry *entry) |
336 | { | |
337 | struct sk_buff *entskb = entry->skb; | |
338 | u32 nlalen = 0; | |
339 | ||
340 | if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb)) | |
341 | return 0; | |
342 | ||
343 | if (skb_vlan_tag_present(entskb)) | |
344 | nlalen += nla_total_size(nla_total_size(sizeof(__be16)) + | |
345 | nla_total_size(sizeof(__be16))); | |
346 | ||
347 | if (entskb->network_header > entskb->mac_header) | |
348 | nlalen += nla_total_size((entskb->network_header - | |
349 | entskb->mac_header)); | |
350 | ||
351 | return nlalen; | |
352 | } | |
353 | ||
354 | static int nfqnl_put_bridge(struct nf_queue_entry *entry, struct sk_buff *skb) | |
355 | { | |
356 | struct sk_buff *entskb = entry->skb; | |
357 | ||
358 | if (entry->state.pf != PF_BRIDGE || !skb_mac_header_was_set(entskb)) | |
359 | return 0; | |
360 | ||
361 | if (skb_vlan_tag_present(entskb)) { | |
362 | struct nlattr *nest; | |
363 | ||
ae0be8de | 364 | nest = nla_nest_start(skb, NFQA_VLAN); |
15824ab2 SB |
365 | if (!nest) |
366 | goto nla_put_failure; | |
367 | ||
368 | if (nla_put_be16(skb, NFQA_VLAN_TCI, htons(entskb->vlan_tci)) || | |
369 | nla_put_be16(skb, NFQA_VLAN_PROTO, entskb->vlan_proto)) | |
370 | goto nla_put_failure; | |
371 | ||
372 | nla_nest_end(skb, nest); | |
373 | } | |
374 | ||
375 | if (entskb->mac_header < entskb->network_header) { | |
376 | int len = (int)(entskb->network_header - entskb->mac_header); | |
377 | ||
378 | if (nla_put(skb, NFQA_L2HDR, len, skb_mac_header(entskb))) | |
379 | goto nla_put_failure; | |
380 | } | |
381 | ||
382 | return 0; | |
383 | ||
384 | nla_put_failure: | |
385 | return -1; | |
386 | } | |
387 | ||
7af4cc3f | 388 | static struct sk_buff * |
74332687 | 389 | nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue, |
5863702a ED |
390 | struct nf_queue_entry *entry, |
391 | __be32 **packet_id_ptr) | |
7af4cc3f | 392 | { |
7af4cc3f | 393 | size_t size; |
c5b0db32 | 394 | size_t data_len = 0, cap_len = 0; |
af2806f8 | 395 | unsigned int hlen = 0; |
7af4cc3f | 396 | struct sk_buff *skb; |
5863702a ED |
397 | struct nlattr *nla; |
398 | struct nfqnl_msg_packet_hdr *pmsg; | |
7af4cc3f | 399 | struct nlmsghdr *nlh; |
3e4ead4f JJ |
400 | struct sk_buff *entskb = entry->skb; |
401 | struct net_device *indev; | |
402 | struct net_device *outdev; | |
9cb01766 | 403 | struct nf_conn *ct = NULL; |
b43c2793 | 404 | enum ip_conntrack_info ctinfo = 0; |
285c8a7a | 405 | const struct nfnl_ct_hook *nfnl_ct; |
496e4ae7 | 406 | bool csum_verify; |
ef493bd9 RK |
407 | char *secdata = NULL; |
408 | u32 seclen = 0; | |
80fcec67 | 409 | ktime_t tstamp; |
7af4cc3f | 410 | |
7e59b3fe | 411 | size = nlmsg_total_size(sizeof(struct nfgenmsg)) |
df6fb868 PM |
412 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hdr)) |
413 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
414 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
1109a90c | 415 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
df6fb868 PM |
416 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
417 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ | |
fbcd923c | 418 | #endif |
df6fb868 | 419 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
8b541364 | 420 | + nla_total_size(sizeof(u_int32_t)) /* priority */ |
df6fb868 | 421 | + nla_total_size(sizeof(struct nfqnl_msg_packet_hw)) |
7237190d | 422 | + nla_total_size(sizeof(u_int32_t)) /* skbinfo */ |
28c1b6df ES |
423 | #if IS_ENABLED(CONFIG_CGROUP_NET_CLASSID) |
424 | + nla_total_size(sizeof(u_int32_t)) /* classid */ | |
425 | #endif | |
ae08ce00 ED |
426 | + nla_total_size(sizeof(u_int32_t)); /* cap_len */ |
427 | ||
80fcec67 MKL |
428 | tstamp = skb_tstamp_cond(entskb, false); |
429 | if (tstamp) | |
ae08ce00 | 430 | size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)); |
7af4cc3f | 431 | |
15824ab2 SB |
432 | size += nfqnl_get_bridge_size(entry); |
433 | ||
1d1de89b DM |
434 | if (entry->state.hook <= NF_INET_FORWARD || |
435 | (entry->state.hook == NF_INET_POST_ROUTING && entskb->sk == NULL)) | |
496e4ae7 FW |
436 | csum_verify = !skb_csum_unnecessary(entskb); |
437 | else | |
438 | csum_verify = false; | |
439 | ||
1d1de89b | 440 | outdev = entry->state.out; |
3e4ead4f | 441 | |
14cd5d4a | 442 | switch ((enum nfqnl_config_mode)READ_ONCE(queue->copy_mode)) { |
7af4cc3f HW |
443 | case NFQNL_COPY_META: |
444 | case NFQNL_COPY_NONE: | |
7af4cc3f | 445 | break; |
601e68e1 | 446 | |
7af4cc3f | 447 | case NFQNL_COPY_PACKET: |
00bd1cc2 FW |
448 | if (!(queue->flags & NFQA_CFG_F_GSO) && |
449 | entskb->ip_summed == CHECKSUM_PARTIAL && | |
c463ac97 | 450 | skb_checksum_help(entskb)) |
e7dfb09a | 451 | return NULL; |
c463ac97 | 452 | |
14cd5d4a | 453 | data_len = READ_ONCE(queue->copy_range); |
9cefbbc9 | 454 | if (data_len > entskb->len) |
3e4ead4f | 455 | data_len = entskb->len; |
601e68e1 | 456 | |
af2806f8 TG |
457 | hlen = skb_zerocopy_headlen(entskb); |
458 | hlen = min_t(unsigned int, hlen, data_len); | |
ae08ce00 | 459 | size += sizeof(struct nlattr) + hlen; |
6ee584be | 460 | cap_len = entskb->len; |
7af4cc3f | 461 | break; |
7af4cc3f HW |
462 | } |
463 | ||
8e662164 AB |
464 | nfnl_ct = rcu_dereference(nfnl_ct_hook); |
465 | ||
83ace77f | 466 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
b7bd1809 | 467 | if (queue->flags & NFQA_CFG_F_CONNTRACK) { |
a4b4766c | 468 | if (nfnl_ct != NULL) { |
83ace77f | 469 | ct = nf_ct_get(entskb, &ctinfo); |
b7bd1809 | 470 | if (ct != NULL) |
a4b4766c | 471 | size += nfnl_ct->build_size(ct); |
b7bd1809 PNA |
472 | } |
473 | } | |
83ace77f | 474 | #endif |
7af4cc3f | 475 | |
08c0cad6 | 476 | if (queue->flags & NFQA_CFG_F_UID_GID) { |
7e59b3fe | 477 | size += (nla_total_size(sizeof(u_int32_t)) /* uid */ |
08c0cad6 VG |
478 | + nla_total_size(sizeof(u_int32_t))); /* gid */ |
479 | } | |
480 | ||
ef493bd9 RK |
481 | if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) { |
482 | seclen = nfqnl_get_sk_secctx(entskb, &secdata); | |
483 | if (seclen) | |
484 | size += nla_total_size(seclen); | |
485 | } | |
486 | ||
c5b0db32 | 487 | skb = alloc_skb(size, GFP_ATOMIC); |
36d5fe6a ZK |
488 | if (!skb) { |
489 | skb_tx_error(entskb); | |
77c1c03c | 490 | goto nlmsg_failure; |
36d5fe6a | 491 | } |
601e68e1 | 492 | |
19c28b13 PNA |
493 | nlh = nfnl_msg_put(skb, 0, 0, |
494 | nfnl_msg_type(NFNL_SUBSYS_QUEUE, NFQNL_MSG_PACKET), | |
495 | 0, entry->state.pf, NFNETLINK_V0, | |
496 | htons(queue->queue_num)); | |
3da07c0c | 497 | if (!nlh) { |
36d5fe6a | 498 | skb_tx_error(entskb); |
3da07c0c | 499 | kfree_skb(skb); |
77c1c03c | 500 | goto nlmsg_failure; |
3da07c0c | 501 | } |
7af4cc3f | 502 | |
5863702a ED |
503 | nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg)); |
504 | pmsg = nla_data(nla); | |
505 | pmsg->hw_protocol = entskb->protocol; | |
1d1de89b | 506 | pmsg->hook = entry->state.hook; |
5863702a | 507 | *packet_id_ptr = &pmsg->packet_id; |
7af4cc3f | 508 | |
1d1de89b | 509 | indev = entry->state.in; |
3e4ead4f | 510 | if (indev) { |
1109a90c | 511 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
a447189e DM |
512 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex))) |
513 | goto nla_put_failure; | |
fbcd923c | 514 | #else |
1d1de89b | 515 | if (entry->state.pf == PF_BRIDGE) { |
fbcd923c | 516 | /* Case 1: indev is physical input device, we need to |
601e68e1 | 517 | * look for bridge group (when called from |
fbcd923c | 518 | * netfilter_bridge) */ |
a447189e DM |
519 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
520 | htonl(indev->ifindex)) || | |
fbcd923c | 521 | /* this is the bridge group "brX" */ |
f350a0a8 | 522 | /* rcu_read_lock()ed by __nf_queue */ |
a447189e DM |
523 | nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
524 | htonl(br_port_get_rcu(indev)->br->dev->ifindex))) | |
525 | goto nla_put_failure; | |
fbcd923c | 526 | } else { |
c737b7c4 FW |
527 | int physinif; |
528 | ||
fbcd923c HW |
529 | /* Case 2: indev is bridge group, we need to look for |
530 | * physical device (when called from ipv4) */ | |
a447189e DM |
531 | if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, |
532 | htonl(indev->ifindex))) | |
533 | goto nla_put_failure; | |
c737b7c4 FW |
534 | |
535 | physinif = nf_bridge_get_physinif(entskb); | |
536 | if (physinif && | |
a447189e | 537 | nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV, |
c737b7c4 | 538 | htonl(physinif))) |
a447189e | 539 | goto nla_put_failure; |
fbcd923c HW |
540 | } |
541 | #endif | |
7af4cc3f HW |
542 | } |
543 | ||
3e4ead4f | 544 | if (outdev) { |
1109a90c | 545 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
a447189e DM |
546 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex))) |
547 | goto nla_put_failure; | |
fbcd923c | 548 | #else |
1d1de89b | 549 | if (entry->state.pf == PF_BRIDGE) { |
fbcd923c | 550 | /* Case 1: outdev is physical output device, we need to |
601e68e1 | 551 | * look for bridge group (when called from |
fbcd923c | 552 | * netfilter_bridge) */ |
a447189e DM |
553 | if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
554 | htonl(outdev->ifindex)) || | |
fbcd923c | 555 | /* this is the bridge group "brX" */ |
f350a0a8 | 556 | /* rcu_read_lock()ed by __nf_queue */ |
a447189e DM |
557 | nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
558 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) | |
559 | goto nla_put_failure; | |
fbcd923c | 560 | } else { |
c737b7c4 FW |
561 | int physoutif; |
562 | ||
fbcd923c HW |
563 | /* Case 2: outdev is bridge group, we need to look for |
564 | * physical output device (when called from ipv4) */ | |
a447189e DM |
565 | if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, |
566 | htonl(outdev->ifindex))) | |
567 | goto nla_put_failure; | |
c737b7c4 FW |
568 | |
569 | physoutif = nf_bridge_get_physoutif(entskb); | |
570 | if (physoutif && | |
a447189e | 571 | nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV, |
c737b7c4 | 572 | htonl(physoutif))) |
a447189e | 573 | goto nla_put_failure; |
fbcd923c HW |
574 | } |
575 | #endif | |
7af4cc3f HW |
576 | } |
577 | ||
a447189e DM |
578 | if (entskb->mark && |
579 | nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark))) | |
580 | goto nla_put_failure; | |
7af4cc3f | 581 | |
8b541364 ND |
582 | if (entskb->priority && |
583 | nla_put_be32(skb, NFQA_PRIORITY, htonl(entskb->priority))) | |
584 | goto nla_put_failure; | |
585 | ||
2c38de4c | 586 | if (indev && entskb->dev && |
ebb966d3 IG |
587 | skb_mac_header_was_set(entskb) && |
588 | skb_mac_header_len(entskb) != 0) { | |
7af4cc3f | 589 | struct nfqnl_msg_packet_hw phw; |
e4d091d7 DC |
590 | int len; |
591 | ||
592 | memset(&phw, 0, sizeof(phw)); | |
593 | len = dev_parse_header(entskb, phw.hw_addr); | |
b95cce35 SH |
594 | if (len) { |
595 | phw.hw_addrlen = htons(len); | |
a447189e DM |
596 | if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw)) |
597 | goto nla_put_failure; | |
b95cce35 | 598 | } |
7af4cc3f HW |
599 | } |
600 | ||
15824ab2 SB |
601 | if (nfqnl_put_bridge(entry, skb) < 0) |
602 | goto nla_put_failure; | |
603 | ||
80fcec67 | 604 | if (entry->state.hook <= NF_INET_FORWARD && tstamp) { |
7af4cc3f | 605 | struct nfqnl_msg_packet_timestamp ts; |
80fcec67 | 606 | struct timespec64 kts = ktime_to_timespec64(tstamp); |
b28b1e82 PNA |
607 | |
608 | ts.sec = cpu_to_be64(kts.tv_sec); | |
609 | ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC); | |
7af4cc3f | 610 | |
a447189e DM |
611 | if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts)) |
612 | goto nla_put_failure; | |
7af4cc3f HW |
613 | } |
614 | ||
08c0cad6 VG |
615 | if ((queue->flags & NFQA_CFG_F_UID_GID) && entskb->sk && |
616 | nfqnl_put_sk_uidgid(skb, entskb->sk) < 0) | |
617 | goto nla_put_failure; | |
618 | ||
28c1b6df ES |
619 | if (nfqnl_put_sk_classid(skb, entskb->sk) < 0) |
620 | goto nla_put_failure; | |
621 | ||
ef493bd9 RK |
622 | if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata)) |
623 | goto nla_put_failure; | |
624 | ||
a4b4766c | 625 | if (ct && nfnl_ct->build(skb, ct, ctinfo, NFQA_CT, NFQA_CT_INFO) < 0) |
ae08ce00 ED |
626 | goto nla_put_failure; |
627 | ||
7f87712c FW |
628 | if (cap_len > data_len && |
629 | nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) | |
ae08ce00 ED |
630 | goto nla_put_failure; |
631 | ||
496e4ae7 | 632 | if (nfqnl_put_packet_info(skb, entskb, csum_verify)) |
7237190d FW |
633 | goto nla_put_failure; |
634 | ||
7af4cc3f | 635 | if (data_len) { |
df6fb868 | 636 | struct nlattr *nla; |
7af4cc3f | 637 | |
ae08ce00 ED |
638 | if (skb_tailroom(skb) < sizeof(*nla) + hlen) |
639 | goto nla_put_failure; | |
7af4cc3f | 640 | |
4df864c1 | 641 | nla = skb_put(skb, sizeof(*nla)); |
df6fb868 | 642 | nla->nla_type = NFQA_PAYLOAD; |
ae08ce00 | 643 | nla->nla_len = nla_attr_size(data_len); |
7af4cc3f | 644 | |
36d5fe6a ZK |
645 | if (skb_zerocopy(skb, entskb, data_len, hlen)) |
646 | goto nla_put_failure; | |
7af4cc3f | 647 | } |
601e68e1 | 648 | |
ae08ce00 | 649 | nlh->nlmsg_len = skb->len; |
77c1c03c LZ |
650 | if (seclen) |
651 | security_release_secctx(secdata, seclen); | |
7af4cc3f HW |
652 | return skb; |
653 | ||
df6fb868 | 654 | nla_put_failure: |
36d5fe6a | 655 | skb_tx_error(entskb); |
a6729955 | 656 | kfree_skb(skb); |
e87cc472 | 657 | net_err_ratelimited("nf_queue: error creating packet message\n"); |
77c1c03c LZ |
658 | nlmsg_failure: |
659 | if (seclen) | |
660 | security_release_secctx(secdata, seclen); | |
7af4cc3f HW |
661 | return NULL; |
662 | } | |
663 | ||
5da773a3 FW |
664 | static bool nf_ct_drop_unconfirmed(const struct nf_queue_entry *entry) |
665 | { | |
666 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
667 | static const unsigned long flags = IPS_CONFIRMED | IPS_DYING; | |
668 | const struct nf_conn *ct = (void *)skb_nfct(entry->skb); | |
669 | ||
670 | if (ct && ((ct->status & flags) == IPS_DYING)) | |
671 | return true; | |
672 | #endif | |
673 | return false; | |
674 | } | |
675 | ||
7af4cc3f | 676 | static int |
a5fedd43 FW |
677 | __nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue, |
678 | struct nf_queue_entry *entry) | |
7af4cc3f | 679 | { |
7af4cc3f | 680 | struct sk_buff *nskb; |
f1585086 | 681 | int err = -ENOBUFS; |
5863702a | 682 | __be32 *packet_id_ptr; |
fdb694a0 | 683 | int failopen = 0; |
7af4cc3f | 684 | |
74332687 | 685 | nskb = nfqnl_build_packet_message(net, queue, entry, &packet_id_ptr); |
f1585086 FW |
686 | if (nskb == NULL) { |
687 | err = -ENOMEM; | |
0ef0f465 | 688 | goto err_out; |
f1585086 | 689 | } |
7af4cc3f | 690 | spin_lock_bh(&queue->lock); |
601e68e1 | 691 | |
5da773a3 FW |
692 | if (nf_ct_drop_unconfirmed(entry)) |
693 | goto err_out_free_nskb; | |
694 | ||
7af4cc3f | 695 | if (queue->queue_total >= queue->queue_maxlen) { |
fdb694a0 KK |
696 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
697 | failopen = 1; | |
698 | err = 0; | |
699 | } else { | |
700 | queue->queue_dropped++; | |
701 | net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n", | |
702 | queue->queue_total); | |
703 | } | |
7af4cc3f HW |
704 | goto err_out_free_nskb; |
705 | } | |
5863702a ED |
706 | entry->id = ++queue->id_sequence; |
707 | *packet_id_ptr = htonl(entry->id); | |
7af4cc3f HW |
708 | |
709 | /* nfnetlink_unicast will either free the nskb or add it to a socket */ | |
ee921183 | 710 | err = nfnetlink_unicast(nskb, net, queue->peer_portid); |
0ef0f465 | 711 | if (err < 0) { |
93140113 PNA |
712 | if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { |
713 | failopen = 1; | |
714 | err = 0; | |
715 | } else { | |
716 | queue->queue_user_dropped++; | |
717 | } | |
7af4cc3f HW |
718 | goto err_out_unlock; |
719 | } | |
720 | ||
721 | __enqueue_entry(queue, entry); | |
722 | ||
723 | spin_unlock_bh(&queue->lock); | |
0ef0f465 | 724 | return 0; |
7af4cc3f HW |
725 | |
726 | err_out_free_nskb: | |
601e68e1 | 727 | kfree_skb(nskb); |
7af4cc3f HW |
728 | err_out_unlock: |
729 | spin_unlock_bh(&queue->lock); | |
fdb694a0 | 730 | if (failopen) |
368982cd | 731 | nfqnl_reinject(entry, NF_ACCEPT); |
0ef0f465 | 732 | err_out: |
f1585086 | 733 | return err; |
7af4cc3f HW |
734 | } |
735 | ||
a5fedd43 FW |
736 | static struct nf_queue_entry * |
737 | nf_queue_entry_dup(struct nf_queue_entry *e) | |
738 | { | |
739 | struct nf_queue_entry *entry = kmemdup(e, e->size, GFP_ATOMIC); | |
c3873070 FW |
740 | |
741 | if (!entry) | |
742 | return NULL; | |
743 | ||
744 | if (nf_queue_entry_get_refs(entry)) | |
745 | return entry; | |
746 | ||
747 | kfree(entry); | |
748 | return NULL; | |
a5fedd43 FW |
749 | } |
750 | ||
1109a90c | 751 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
a5fedd43 FW |
752 | /* When called from bridge netfilter, skb->data must point to MAC header |
753 | * before calling skb_gso_segment(). Else, original MAC header is lost | |
754 | * and segmented skbs will be sent to wrong destination. | |
755 | */ | |
756 | static void nf_bridge_adjust_skb_data(struct sk_buff *skb) | |
757 | { | |
c4b0e771 | 758 | if (nf_bridge_info_get(skb)) |
a5fedd43 FW |
759 | __skb_push(skb, skb->network_header - skb->mac_header); |
760 | } | |
761 | ||
762 | static void nf_bridge_adjust_segmented_data(struct sk_buff *skb) | |
763 | { | |
c4b0e771 | 764 | if (nf_bridge_info_get(skb)) |
a5fedd43 FW |
765 | __skb_pull(skb, skb->network_header - skb->mac_header); |
766 | } | |
767 | #else | |
768 | #define nf_bridge_adjust_skb_data(s) do {} while (0) | |
769 | #define nf_bridge_adjust_segmented_data(s) do {} while (0) | |
770 | #endif | |
771 | ||
a5fedd43 FW |
772 | static int |
773 | __nfqnl_enqueue_packet_gso(struct net *net, struct nfqnl_instance *queue, | |
774 | struct sk_buff *skb, struct nf_queue_entry *entry) | |
775 | { | |
776 | int ret = -ENOMEM; | |
777 | struct nf_queue_entry *entry_seg; | |
778 | ||
779 | nf_bridge_adjust_segmented_data(skb); | |
780 | ||
781 | if (skb->next == NULL) { /* last packet, no need to copy entry */ | |
782 | struct sk_buff *gso_skb = entry->skb; | |
783 | entry->skb = skb; | |
784 | ret = __nfqnl_enqueue_packet(net, queue, entry); | |
785 | if (ret) | |
786 | entry->skb = gso_skb; | |
787 | return ret; | |
788 | } | |
789 | ||
a8305bff | 790 | skb_mark_not_on_list(skb); |
a5fedd43 FW |
791 | |
792 | entry_seg = nf_queue_entry_dup(entry); | |
793 | if (entry_seg) { | |
794 | entry_seg->skb = skb; | |
795 | ret = __nfqnl_enqueue_packet(net, queue, entry_seg); | |
796 | if (ret) | |
dd3cc111 | 797 | nf_queue_entry_free(entry_seg); |
a5fedd43 FW |
798 | } |
799 | return ret; | |
800 | } | |
801 | ||
802 | static int | |
803 | nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum) | |
804 | { | |
805 | unsigned int queued; | |
806 | struct nfqnl_instance *queue; | |
2670ee77 | 807 | struct sk_buff *skb, *segs, *nskb; |
a5fedd43 | 808 | int err = -ENOBUFS; |
9dff2c96 | 809 | struct net *net = entry->state.net; |
a5fedd43 FW |
810 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
811 | ||
e2361cb9 | 812 | /* rcu_read_lock()ed by nf_hook_thresh */ |
a5fedd43 FW |
813 | queue = instance_lookup(q, queuenum); |
814 | if (!queue) | |
815 | return -ESRCH; | |
816 | ||
817 | if (queue->copy_mode == NFQNL_COPY_NONE) | |
818 | return -EINVAL; | |
819 | ||
a5fedd43 FW |
820 | skb = entry->skb; |
821 | ||
1d1de89b | 822 | switch (entry->state.pf) { |
a5fedd43 FW |
823 | case NFPROTO_IPV4: |
824 | skb->protocol = htons(ETH_P_IP); | |
825 | break; | |
826 | case NFPROTO_IPV6: | |
827 | skb->protocol = htons(ETH_P_IPV6); | |
828 | break; | |
829 | } | |
830 | ||
7b8dfe28 PNA |
831 | if ((queue->flags & NFQA_CFG_F_GSO) || !skb_is_gso(skb)) |
832 | return __nfqnl_enqueue_packet(net, queue, entry); | |
833 | ||
a5fedd43 FW |
834 | nf_bridge_adjust_skb_data(skb); |
835 | segs = skb_gso_segment(skb, 0); | |
836 | /* Does not use PTR_ERR to limit the number of error codes that can be | |
ed78d09d | 837 | * returned by nf_queue. For instance, callers rely on -ESRCH to |
a5fedd43 FW |
838 | * mean 'ignore this hook'. |
839 | */ | |
330966e5 | 840 | if (IS_ERR_OR_NULL(segs)) |
a5fedd43 FW |
841 | goto out_err; |
842 | queued = 0; | |
843 | err = 0; | |
2670ee77 | 844 | skb_list_walk_safe(segs, segs, nskb) { |
a5fedd43 FW |
845 | if (err == 0) |
846 | err = __nfqnl_enqueue_packet_gso(net, queue, | |
847 | segs, entry); | |
848 | if (err == 0) | |
849 | queued++; | |
850 | else | |
851 | kfree_skb(segs); | |
2670ee77 | 852 | } |
a5fedd43 FW |
853 | |
854 | if (queued) { | |
855 | if (err) /* some segments are already queued */ | |
dd3cc111 | 856 | nf_queue_entry_free(entry); |
a5fedd43 FW |
857 | kfree_skb(skb); |
858 | return 0; | |
859 | } | |
860 | out_err: | |
861 | nf_bridge_adjust_segmented_data(skb); | |
862 | return err; | |
863 | } | |
864 | ||
7af4cc3f | 865 | static int |
99a63d36 | 866 | nfqnl_mangle(void *data, unsigned int data_len, struct nf_queue_entry *e, int diff) |
7af4cc3f | 867 | { |
e2b58a67 | 868 | struct sk_buff *nskb; |
7af4cc3f | 869 | |
d8a585d7 | 870 | if (diff < 0) { |
99a63d36 FW |
871 | unsigned int min_len = skb_transport_offset(e->skb); |
872 | ||
873 | if (data_len < min_len) | |
874 | return -EINVAL; | |
875 | ||
d8a585d7 PM |
876 | if (pskb_trim(e->skb, data_len)) |
877 | return -ENOMEM; | |
878 | } else if (diff > 0) { | |
7af4cc3f HW |
879 | if (data_len > 0xFFFF) |
880 | return -EINVAL; | |
881 | if (diff > skb_tailroom(e->skb)) { | |
9a732ed6 AE |
882 | nskb = skb_copy_expand(e->skb, skb_headroom(e->skb), |
883 | diff, GFP_ATOMIC); | |
5191d70f | 884 | if (!nskb) |
e2b58a67 | 885 | return -ENOMEM; |
e2b58a67 PM |
886 | kfree_skb(e->skb); |
887 | e->skb = nskb; | |
7af4cc3f HW |
888 | } |
889 | skb_put(e->skb, diff); | |
890 | } | |
2cf6bffc | 891 | if (skb_ensure_writable(e->skb, data_len)) |
7af4cc3f | 892 | return -ENOMEM; |
27d7ff46 | 893 | skb_copy_to_linear_data(e->skb, data, data_len); |
e7dfb09a | 894 | e->skb->ip_summed = CHECKSUM_NONE; |
7af4cc3f HW |
895 | return 0; |
896 | } | |
897 | ||
7af4cc3f HW |
898 | static int |
899 | nfqnl_set_mode(struct nfqnl_instance *queue, | |
900 | unsigned char mode, unsigned int range) | |
901 | { | |
c5de0dfd | 902 | int status = 0; |
7af4cc3f HW |
903 | |
904 | spin_lock_bh(&queue->lock); | |
c5de0dfd PM |
905 | switch (mode) { |
906 | case NFQNL_COPY_NONE: | |
907 | case NFQNL_COPY_META: | |
908 | queue->copy_mode = mode; | |
909 | queue->copy_range = 0; | |
910 | break; | |
911 | ||
912 | case NFQNL_COPY_PACKET: | |
913 | queue->copy_mode = mode; | |
9cefbbc9 FW |
914 | if (range == 0 || range > NFQNL_MAX_COPY_RANGE) |
915 | queue->copy_range = NFQNL_MAX_COPY_RANGE; | |
c5de0dfd PM |
916 | else |
917 | queue->copy_range = range; | |
918 | break; | |
919 | ||
920 | default: | |
921 | status = -EINVAL; | |
922 | ||
923 | } | |
7af4cc3f HW |
924 | spin_unlock_bh(&queue->lock); |
925 | ||
926 | return status; | |
927 | } | |
928 | ||
929 | static int | |
02f014d8 | 930 | dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex) |
7af4cc3f | 931 | { |
c4b0e771 FW |
932 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
933 | int physinif, physoutif; | |
934 | ||
935 | physinif = nf_bridge_get_physinif(entry->skb); | |
936 | physoutif = nf_bridge_get_physoutif(entry->skb); | |
937 | ||
938 | if (physinif == ifindex || physoutif == ifindex) | |
939 | return 1; | |
940 | #endif | |
1d1de89b DM |
941 | if (entry->state.in) |
942 | if (entry->state.in->ifindex == ifindex) | |
7af4cc3f | 943 | return 1; |
1d1de89b DM |
944 | if (entry->state.out) |
945 | if (entry->state.out->ifindex == ifindex) | |
7af4cc3f | 946 | return 1; |
c737b7c4 | 947 | |
7af4cc3f HW |
948 | return 0; |
949 | } | |
950 | ||
951 | /* drop all packets with either indev or outdev == ifindex from all queue | |
952 | * instances */ | |
953 | static void | |
e8179610 | 954 | nfqnl_dev_drop(struct net *net, int ifindex) |
7af4cc3f HW |
955 | { |
956 | int i; | |
e8179610 | 957 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
601e68e1 | 958 | |
9872bec7 | 959 | rcu_read_lock(); |
7af4cc3f | 960 | |
9872bec7 | 961 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
7af4cc3f | 962 | struct nfqnl_instance *inst; |
e8179610 | 963 | struct hlist_head *head = &q->instance_table[i]; |
7af4cc3f | 964 | |
b67bfe0d | 965 | hlist_for_each_entry_rcu(inst, head, hlist) |
b43d8d85 | 966 | nfqnl_flush(inst, dev_cmp, ifindex); |
7af4cc3f HW |
967 | } |
968 | ||
9872bec7 | 969 | rcu_read_unlock(); |
7af4cc3f HW |
970 | } |
971 | ||
7af4cc3f HW |
972 | static int |
973 | nfqnl_rcv_dev_event(struct notifier_block *this, | |
974 | unsigned long event, void *ptr) | |
975 | { | |
351638e7 | 976 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
7af4cc3f HW |
977 | |
978 | /* Drop any packets associated with the downed device */ | |
979 | if (event == NETDEV_DOWN) | |
e8179610 | 980 | nfqnl_dev_drop(dev_net(dev), dev->ifindex); |
7af4cc3f HW |
981 | return NOTIFY_DONE; |
982 | } | |
983 | ||
984 | static struct notifier_block nfqnl_dev_notifier = { | |
985 | .notifier_call = nfqnl_rcv_dev_event, | |
986 | }; | |
987 | ||
26888dfd | 988 | static void nfqnl_nf_hook_drop(struct net *net) |
8405a8ff EB |
989 | { |
990 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); | |
991 | int i; | |
992 | ||
87029970 FW |
993 | /* This function is also called on net namespace error unwind, |
994 | * when pernet_ops->init() failed and ->exit() functions of the | |
995 | * previous pernet_ops gets called. | |
996 | * | |
997 | * This may result in a call to nfqnl_nf_hook_drop() before | |
998 | * struct nfnl_queue_net was allocated. | |
999 | */ | |
1000 | if (!q) | |
1001 | return; | |
1002 | ||
8405a8ff EB |
1003 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
1004 | struct nfqnl_instance *inst; | |
1005 | struct hlist_head *head = &q->instance_table[i]; | |
1006 | ||
26888dfd | 1007 | hlist_for_each_entry_rcu(inst, head, hlist) |
039b40ee | 1008 | nfqnl_flush(inst, NULL, 0); |
8405a8ff | 1009 | } |
8405a8ff EB |
1010 | } |
1011 | ||
7af4cc3f HW |
1012 | static int |
1013 | nfqnl_rcv_nl_event(struct notifier_block *this, | |
1014 | unsigned long event, void *ptr) | |
1015 | { | |
1016 | struct netlink_notify *n = ptr; | |
e8179610 | 1017 | struct nfnl_queue_net *q = nfnl_queue_pernet(n->net); |
7af4cc3f | 1018 | |
dee5817e | 1019 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
7af4cc3f HW |
1020 | int i; |
1021 | ||
15e47304 | 1022 | /* destroy all instances for this portid */ |
e8179610 | 1023 | spin_lock(&q->instances_lock); |
9872bec7 | 1024 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
b67bfe0d | 1025 | struct hlist_node *t2; |
7af4cc3f | 1026 | struct nfqnl_instance *inst; |
e8179610 | 1027 | struct hlist_head *head = &q->instance_table[i]; |
7af4cc3f | 1028 | |
b67bfe0d | 1029 | hlist_for_each_entry_safe(inst, t2, head, hlist) { |
e8179610 | 1030 | if (n->portid == inst->peer_portid) |
7af4cc3f HW |
1031 | __instance_destroy(inst); |
1032 | } | |
1033 | } | |
e8179610 | 1034 | spin_unlock(&q->instances_lock); |
7af4cc3f HW |
1035 | } |
1036 | return NOTIFY_DONE; | |
1037 | } | |
1038 | ||
1039 | static struct notifier_block nfqnl_rtnl_notifier = { | |
1040 | .notifier_call = nfqnl_rcv_nl_event, | |
1041 | }; | |
1042 | ||
8d45ff22 SB |
1043 | static const struct nla_policy nfqa_vlan_policy[NFQA_VLAN_MAX + 1] = { |
1044 | [NFQA_VLAN_TCI] = { .type = NLA_U16}, | |
1045 | [NFQA_VLAN_PROTO] = { .type = NLA_U16}, | |
1046 | }; | |
1047 | ||
5bf75853 PM |
1048 | static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = { |
1049 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, | |
1050 | [NFQA_MARK] = { .type = NLA_U32 }, | |
1051 | [NFQA_PAYLOAD] = { .type = NLA_UNSPEC }, | |
9cb01766 | 1052 | [NFQA_CT] = { .type = NLA_UNSPEC }, |
bd077937 | 1053 | [NFQA_EXP] = { .type = NLA_UNSPEC }, |
8d45ff22 | 1054 | [NFQA_VLAN] = { .type = NLA_NESTED }, |
98eee88b | 1055 | [NFQA_PRIORITY] = { .type = NLA_U32 }, |
838ab636 HW |
1056 | }; |
1057 | ||
97d32cf9 FW |
1058 | static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = { |
1059 | [NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) }, | |
1060 | [NFQA_MARK] = { .type = NLA_U32 }, | |
98eee88b | 1061 | [NFQA_PRIORITY] = { .type = NLA_U32 }, |
97d32cf9 FW |
1062 | }; |
1063 | ||
e8179610 | 1064 | static struct nfqnl_instance * |
cc6bc448 | 1065 | verdict_instance_lookup(struct nfnl_queue_net *q, u16 queue_num, u32 nlportid) |
97d32cf9 FW |
1066 | { |
1067 | struct nfqnl_instance *queue; | |
1068 | ||
e8179610 | 1069 | queue = instance_lookup(q, queue_num); |
97d32cf9 FW |
1070 | if (!queue) |
1071 | return ERR_PTR(-ENODEV); | |
1072 | ||
15e47304 | 1073 | if (queue->peer_portid != nlportid) |
97d32cf9 FW |
1074 | return ERR_PTR(-EPERM); |
1075 | ||
1076 | return queue; | |
1077 | } | |
1078 | ||
1079 | static struct nfqnl_msg_verdict_hdr* | |
1080 | verdicthdr_get(const struct nlattr * const nfqa[]) | |
1081 | { | |
1082 | struct nfqnl_msg_verdict_hdr *vhdr; | |
1083 | unsigned int verdict; | |
1084 | ||
1085 | if (!nfqa[NFQA_VERDICT_HDR]) | |
1086 | return NULL; | |
1087 | ||
1088 | vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]); | |
c6675233 FW |
1089 | verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK; |
1090 | if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN) | |
97d32cf9 FW |
1091 | return NULL; |
1092 | return vhdr; | |
1093 | } | |
1094 | ||
1095 | static int nfq_id_after(unsigned int id, unsigned int max) | |
1096 | { | |
1097 | return (int)(id - max) > 0; | |
1098 | } | |
1099 | ||
797d4980 PNA |
1100 | static int nfqnl_recv_verdict_batch(struct sk_buff *skb, |
1101 | const struct nfnl_info *info, | |
1102 | const struct nlattr * const nfqa[]) | |
97d32cf9 | 1103 | { |
797d4980 | 1104 | struct nfnl_queue_net *q = nfnl_queue_pernet(info->net); |
ef4b65e5 | 1105 | u16 queue_num = ntohs(info->nfmsg->res_id); |
97d32cf9 | 1106 | struct nf_queue_entry *entry, *tmp; |
97d32cf9 FW |
1107 | struct nfqnl_msg_verdict_hdr *vhdr; |
1108 | struct nfqnl_instance *queue; | |
797d4980 | 1109 | unsigned int verdict, maxid; |
97d32cf9 | 1110 | LIST_HEAD(batch_list); |
e8179610 G |
1111 | |
1112 | queue = verdict_instance_lookup(q, queue_num, | |
1113 | NETLINK_CB(skb).portid); | |
97d32cf9 FW |
1114 | if (IS_ERR(queue)) |
1115 | return PTR_ERR(queue); | |
1116 | ||
1117 | vhdr = verdicthdr_get(nfqa); | |
1118 | if (!vhdr) | |
1119 | return -EINVAL; | |
1120 | ||
1121 | verdict = ntohl(vhdr->verdict); | |
1122 | maxid = ntohl(vhdr->id); | |
1123 | ||
1124 | spin_lock_bh(&queue->lock); | |
1125 | ||
1126 | list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) { | |
1127 | if (nfq_id_after(entry->id, maxid)) | |
1128 | break; | |
1129 | __dequeue_entry(queue, entry); | |
1130 | list_add_tail(&entry->list, &batch_list); | |
1131 | } | |
1132 | ||
1133 | spin_unlock_bh(&queue->lock); | |
1134 | ||
1135 | if (list_empty(&batch_list)) | |
1136 | return -ENOENT; | |
1137 | ||
1138 | list_for_each_entry_safe(entry, tmp, &batch_list, list) { | |
1139 | if (nfqa[NFQA_MARK]) | |
1140 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); | |
368982cd | 1141 | |
98eee88b ND |
1142 | if (nfqa[NFQA_PRIORITY]) |
1143 | entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY])); | |
1144 | ||
368982cd | 1145 | nfqnl_reinject(entry, verdict); |
97d32cf9 FW |
1146 | } |
1147 | return 0; | |
1148 | } | |
1149 | ||
285c8a7a | 1150 | static struct nf_conn *nfqnl_ct_parse(const struct nfnl_ct_hook *nfnl_ct, |
b7bd1809 PNA |
1151 | const struct nlmsghdr *nlh, |
1152 | const struct nlattr * const nfqa[], | |
1153 | struct nf_queue_entry *entry, | |
1154 | enum ip_conntrack_info *ctinfo) | |
1155 | { | |
83ace77f | 1156 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
b7bd1809 PNA |
1157 | struct nf_conn *ct; |
1158 | ||
83ace77f | 1159 | ct = nf_ct_get(entry->skb, ctinfo); |
b7bd1809 PNA |
1160 | if (ct == NULL) |
1161 | return NULL; | |
1162 | ||
a4b4766c | 1163 | if (nfnl_ct->parse(nfqa[NFQA_CT], ct) < 0) |
b7bd1809 PNA |
1164 | return NULL; |
1165 | ||
1166 | if (nfqa[NFQA_EXP]) | |
a4b4766c | 1167 | nfnl_ct->attach_expect(nfqa[NFQA_EXP], ct, |
b7bd1809 PNA |
1168 | NETLINK_CB(entry->skb).portid, |
1169 | nlmsg_report(nlh)); | |
1170 | return ct; | |
83ace77f FW |
1171 | #else |
1172 | return NULL; | |
1173 | #endif | |
b7bd1809 PNA |
1174 | } |
1175 | ||
8d45ff22 SB |
1176 | static int nfqa_parse_bridge(struct nf_queue_entry *entry, |
1177 | const struct nlattr * const nfqa[]) | |
1178 | { | |
1179 | if (nfqa[NFQA_VLAN]) { | |
1180 | struct nlattr *tb[NFQA_VLAN_MAX + 1]; | |
1181 | int err; | |
1182 | ||
8cb08174 JB |
1183 | err = nla_parse_nested_deprecated(tb, NFQA_VLAN_MAX, |
1184 | nfqa[NFQA_VLAN], | |
1185 | nfqa_vlan_policy, NULL); | |
8d45ff22 SB |
1186 | if (err < 0) |
1187 | return err; | |
1188 | ||
1189 | if (!tb[NFQA_VLAN_TCI] || !tb[NFQA_VLAN_PROTO]) | |
1190 | return -EINVAL; | |
1191 | ||
82eea4cf MM |
1192 | __vlan_hwaccel_put_tag(entry->skb, |
1193 | nla_get_be16(tb[NFQA_VLAN_PROTO]), | |
1194 | ntohs(nla_get_be16(tb[NFQA_VLAN_TCI]))); | |
8d45ff22 SB |
1195 | } |
1196 | ||
1197 | if (nfqa[NFQA_L2HDR]) { | |
1198 | int mac_header_len = entry->skb->network_header - | |
1199 | entry->skb->mac_header; | |
1200 | ||
1201 | if (mac_header_len != nla_len(nfqa[NFQA_L2HDR])) | |
1202 | return -EINVAL; | |
1203 | else if (mac_header_len > 0) | |
1204 | memcpy(skb_mac_header(entry->skb), | |
1205 | nla_data(nfqa[NFQA_L2HDR]), | |
1206 | mac_header_len); | |
1207 | } | |
1208 | ||
1209 | return 0; | |
1210 | } | |
1211 | ||
797d4980 PNA |
1212 | static int nfqnl_recv_verdict(struct sk_buff *skb, const struct nfnl_info *info, |
1213 | const struct nlattr * const nfqa[]) | |
7af4cc3f | 1214 | { |
797d4980 | 1215 | struct nfnl_queue_net *q = nfnl_queue_pernet(info->net); |
ef4b65e5 | 1216 | u_int16_t queue_num = ntohs(info->nfmsg->res_id); |
285c8a7a | 1217 | const struct nfnl_ct_hook *nfnl_ct; |
7af4cc3f | 1218 | struct nfqnl_msg_verdict_hdr *vhdr; |
797d4980 | 1219 | enum ip_conntrack_info ctinfo; |
7af4cc3f | 1220 | struct nfqnl_instance *queue; |
02f014d8 | 1221 | struct nf_queue_entry *entry; |
8c88f87c | 1222 | struct nf_conn *ct = NULL; |
797d4980 | 1223 | unsigned int verdict; |
8d45ff22 | 1224 | int err; |
7af4cc3f | 1225 | |
00a3101f LZ |
1226 | queue = verdict_instance_lookup(q, queue_num, |
1227 | NETLINK_CB(skb).portid); | |
97d32cf9 FW |
1228 | if (IS_ERR(queue)) |
1229 | return PTR_ERR(queue); | |
7af4cc3f | 1230 | |
97d32cf9 FW |
1231 | vhdr = verdicthdr_get(nfqa); |
1232 | if (!vhdr) | |
84a797dd | 1233 | return -EINVAL; |
7af4cc3f | 1234 | |
7af4cc3f HW |
1235 | verdict = ntohl(vhdr->verdict); |
1236 | ||
b43d8d85 | 1237 | entry = find_dequeue_entry(queue, ntohl(vhdr->id)); |
84a797dd ED |
1238 | if (entry == NULL) |
1239 | return -ENOENT; | |
7af4cc3f | 1240 | |
8e662164 AB |
1241 | /* rcu lock already held from nfnl->call_rcu. */ |
1242 | nfnl_ct = rcu_dereference(nfnl_ct_hook); | |
1243 | ||
bd077937 | 1244 | if (nfqa[NFQA_CT]) { |
a4b4766c | 1245 | if (nfnl_ct != NULL) |
797d4980 PNA |
1246 | ct = nfqnl_ct_parse(nfnl_ct, info->nlh, nfqa, entry, |
1247 | &ctinfo); | |
bd077937 | 1248 | } |
9cb01766 | 1249 | |
8d45ff22 SB |
1250 | if (entry->state.pf == PF_BRIDGE) { |
1251 | err = nfqa_parse_bridge(entry, nfqa); | |
1252 | if (err < 0) | |
1253 | return err; | |
1254 | } | |
1255 | ||
df6fb868 | 1256 | if (nfqa[NFQA_PAYLOAD]) { |
8c88f87c PNA |
1257 | u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]); |
1258 | int diff = payload_len - entry->skb->len; | |
1259 | ||
df6fb868 | 1260 | if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]), |
8c88f87c | 1261 | payload_len, entry, diff) < 0) |
7af4cc3f | 1262 | verdict = NF_DROP; |
8c88f87c | 1263 | |
b7bd1809 | 1264 | if (ct && diff) |
a4b4766c | 1265 | nfnl_ct->seq_adjust(entry->skb, ct, ctinfo, diff); |
7af4cc3f HW |
1266 | } |
1267 | ||
df6fb868 | 1268 | if (nfqa[NFQA_MARK]) |
ea3a66ff | 1269 | entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK])); |
601e68e1 | 1270 | |
98eee88b ND |
1271 | if (nfqa[NFQA_PRIORITY]) |
1272 | entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY])); | |
1273 | ||
368982cd | 1274 | nfqnl_reinject(entry, verdict); |
7af4cc3f HW |
1275 | return 0; |
1276 | } | |
1277 | ||
797d4980 PNA |
1278 | static int nfqnl_recv_unsupp(struct sk_buff *skb, const struct nfnl_info *info, |
1279 | const struct nlattr * const cda[]) | |
7af4cc3f HW |
1280 | { |
1281 | return -ENOTSUPP; | |
1282 | } | |
1283 | ||
5bf75853 PM |
1284 | static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = { |
1285 | [NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) }, | |
1286 | [NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) }, | |
ba062ebb ED |
1287 | [NFQA_CFG_QUEUE_MAXLEN] = { .type = NLA_U32 }, |
1288 | [NFQA_CFG_MASK] = { .type = NLA_U32 }, | |
1289 | [NFQA_CFG_FLAGS] = { .type = NLA_U32 }, | |
838ab636 HW |
1290 | }; |
1291 | ||
e3ac5298 | 1292 | static const struct nf_queue_handler nfqh = { |
d4ef3835 AS |
1293 | .outfn = nfqnl_enqueue_packet, |
1294 | .nf_hook_drop = nfqnl_nf_hook_drop, | |
bbd86b9f HW |
1295 | }; |
1296 | ||
a6555365 PNA |
1297 | static int nfqnl_recv_config(struct sk_buff *skb, const struct nfnl_info *info, |
1298 | const struct nlattr * const nfqa[]) | |
7af4cc3f | 1299 | { |
a6555365 | 1300 | struct nfnl_queue_net *q = nfnl_queue_pernet(info->net); |
ef4b65e5 | 1301 | u_int16_t queue_num = ntohs(info->nfmsg->res_id); |
9872bec7 | 1302 | struct nfqnl_msg_config_cmd *cmd = NULL; |
a6555365 | 1303 | struct nfqnl_instance *queue; |
60d2c7f9 | 1304 | __u32 flags = 0, mask = 0; |
838ab636 | 1305 | int ret = 0; |
7af4cc3f | 1306 | |
9872bec7 PM |
1307 | if (nfqa[NFQA_CFG_CMD]) { |
1308 | cmd = nla_data(nfqa[NFQA_CFG_CMD]); | |
1309 | ||
0360ae41 | 1310 | /* Obsolete commands without queue context */ |
9872bec7 | 1311 | switch (cmd->command) { |
0360ae41 FW |
1312 | case NFQNL_CFG_CMD_PF_BIND: return 0; |
1313 | case NFQNL_CFG_CMD_PF_UNBIND: return 0; | |
9872bec7 | 1314 | } |
9872bec7 PM |
1315 | } |
1316 | ||
60d2c7f9 KM |
1317 | /* Check if we support these flags in first place, dependencies should |
1318 | * be there too not to break atomicity. | |
1319 | */ | |
1320 | if (nfqa[NFQA_CFG_FLAGS]) { | |
1321 | if (!nfqa[NFQA_CFG_MASK]) { | |
1322 | /* A mask is needed to specify which flags are being | |
1323 | * changed. | |
1324 | */ | |
1325 | return -EINVAL; | |
1326 | } | |
1327 | ||
1328 | flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS])); | |
1329 | mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK])); | |
1330 | ||
1331 | if (flags >= NFQA_CFG_F_MAX) | |
1332 | return -EOPNOTSUPP; | |
1333 | ||
1334 | #if !IS_ENABLED(CONFIG_NETWORK_SECMARK) | |
1335 | if (flags & mask & NFQA_CFG_F_SECCTX) | |
1336 | return -EOPNOTSUPP; | |
1337 | #endif | |
71b2e5f5 KM |
1338 | if ((flags & mask & NFQA_CFG_F_CONNTRACK) && |
1339 | !rcu_access_pointer(nfnl_ct_hook)) { | |
1340 | #ifdef CONFIG_MODULES | |
1341 | nfnl_unlock(NFNL_SUBSYS_QUEUE); | |
1342 | request_module("ip_conntrack_netlink"); | |
1343 | nfnl_lock(NFNL_SUBSYS_QUEUE); | |
1344 | if (rcu_access_pointer(nfnl_ct_hook)) | |
1345 | return -EAGAIN; | |
1346 | #endif | |
1347 | return -EOPNOTSUPP; | |
1348 | } | |
60d2c7f9 KM |
1349 | } |
1350 | ||
9872bec7 | 1351 | rcu_read_lock(); |
e8179610 | 1352 | queue = instance_lookup(q, queue_num); |
15e47304 | 1353 | if (queue && queue->peer_portid != NETLINK_CB(skb).portid) { |
a3c8e7fd | 1354 | ret = -EPERM; |
9872bec7 | 1355 | goto err_out_unlock; |
a3c8e7fd PM |
1356 | } |
1357 | ||
9872bec7 | 1358 | if (cmd != NULL) { |
7af4cc3f HW |
1359 | switch (cmd->command) { |
1360 | case NFQNL_CFG_CMD_BIND: | |
9872bec7 PM |
1361 | if (queue) { |
1362 | ret = -EBUSY; | |
1363 | goto err_out_unlock; | |
1364 | } | |
e8179610 G |
1365 | queue = instance_create(q, queue_num, |
1366 | NETLINK_CB(skb).portid); | |
baab2ce7 PM |
1367 | if (IS_ERR(queue)) { |
1368 | ret = PTR_ERR(queue); | |
9872bec7 PM |
1369 | goto err_out_unlock; |
1370 | } | |
7af4cc3f HW |
1371 | break; |
1372 | case NFQNL_CFG_CMD_UNBIND: | |
9872bec7 PM |
1373 | if (!queue) { |
1374 | ret = -ENODEV; | |
1375 | goto err_out_unlock; | |
1376 | } | |
e8179610 | 1377 | instance_destroy(q, queue); |
17bc6b48 | 1378 | goto err_out_unlock; |
7af4cc3f | 1379 | case NFQNL_CFG_CMD_PF_BIND: |
7af4cc3f | 1380 | case NFQNL_CFG_CMD_PF_UNBIND: |
7af4cc3f HW |
1381 | break; |
1382 | default: | |
cd21f0ac | 1383 | ret = -ENOTSUPP; |
21c3c971 | 1384 | goto err_out_unlock; |
7af4cc3f | 1385 | } |
7af4cc3f HW |
1386 | } |
1387 | ||
60d2c7f9 KM |
1388 | if (!queue) { |
1389 | ret = -ENODEV; | |
1390 | goto err_out_unlock; | |
1391 | } | |
1392 | ||
df6fb868 | 1393 | if (nfqa[NFQA_CFG_PARAMS]) { |
60d2c7f9 KM |
1394 | struct nfqnl_msg_config_params *params = |
1395 | nla_data(nfqa[NFQA_CFG_PARAMS]); | |
7af4cc3f HW |
1396 | |
1397 | nfqnl_set_mode(queue, params->copy_mode, | |
1398 | ntohl(params->copy_range)); | |
1399 | } | |
1400 | ||
df6fb868 | 1401 | if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) { |
60d2c7f9 | 1402 | __be32 *queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]); |
a3c8e7fd | 1403 | |
829e17a1 EL |
1404 | spin_lock_bh(&queue->lock); |
1405 | queue->queue_maxlen = ntohl(*queue_maxlen); | |
1406 | spin_unlock_bh(&queue->lock); | |
1407 | } | |
1408 | ||
fdb694a0 | 1409 | if (nfqa[NFQA_CFG_FLAGS]) { |
fdb694a0 KK |
1410 | spin_lock_bh(&queue->lock); |
1411 | queue->flags &= ~mask; | |
1412 | queue->flags |= flags & mask; | |
1413 | spin_unlock_bh(&queue->lock); | |
1414 | } | |
1415 | ||
9872bec7 PM |
1416 | err_out_unlock: |
1417 | rcu_read_unlock(); | |
838ab636 | 1418 | return ret; |
7af4cc3f HW |
1419 | } |
1420 | ||
7c8d4cb4 | 1421 | static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = { |
50f2db9e PNA |
1422 | [NFQNL_MSG_PACKET] = { |
1423 | .call = nfqnl_recv_unsupp, | |
1424 | .type = NFNL_CB_RCU, | |
1425 | .attr_count = NFQA_MAX, | |
1426 | }, | |
1427 | [NFQNL_MSG_VERDICT] = { | |
1428 | .call = nfqnl_recv_verdict, | |
1429 | .type = NFNL_CB_RCU, | |
1430 | .attr_count = NFQA_MAX, | |
1431 | .policy = nfqa_verdict_policy | |
1432 | }, | |
1433 | [NFQNL_MSG_CONFIG] = { | |
1434 | .call = nfqnl_recv_config, | |
1435 | .type = NFNL_CB_MUTEX, | |
1436 | .attr_count = NFQA_CFG_MAX, | |
1437 | .policy = nfqa_cfg_policy | |
1438 | }, | |
1439 | [NFQNL_MSG_VERDICT_BATCH] = { | |
1440 | .call = nfqnl_recv_verdict_batch, | |
1441 | .type = NFNL_CB_RCU, | |
1442 | .attr_count = NFQA_MAX, | |
1443 | .policy = nfqa_verdict_batch_policy | |
1444 | }, | |
7af4cc3f HW |
1445 | }; |
1446 | ||
7c8d4cb4 | 1447 | static const struct nfnetlink_subsystem nfqnl_subsys = { |
7af4cc3f HW |
1448 | .name = "nf_queue", |
1449 | .subsys_id = NFNL_SUBSYS_QUEUE, | |
1450 | .cb_count = NFQNL_MSG_MAX, | |
7af4cc3f HW |
1451 | .cb = nfqnl_cb, |
1452 | }; | |
1453 | ||
838ab636 HW |
1454 | #ifdef CONFIG_PROC_FS |
1455 | struct iter_state { | |
e8179610 | 1456 | struct seq_net_private p; |
838ab636 HW |
1457 | unsigned int bucket; |
1458 | }; | |
1459 | ||
1460 | static struct hlist_node *get_first(struct seq_file *seq) | |
1461 | { | |
1462 | struct iter_state *st = seq->private; | |
e8179610 G |
1463 | struct net *net; |
1464 | struct nfnl_queue_net *q; | |
838ab636 HW |
1465 | |
1466 | if (!st) | |
1467 | return NULL; | |
1468 | ||
e8179610 G |
1469 | net = seq_file_net(seq); |
1470 | q = nfnl_queue_pernet(net); | |
838ab636 | 1471 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
e8179610 G |
1472 | if (!hlist_empty(&q->instance_table[st->bucket])) |
1473 | return q->instance_table[st->bucket].first; | |
838ab636 HW |
1474 | } |
1475 | return NULL; | |
1476 | } | |
1477 | ||
1478 | static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h) | |
1479 | { | |
1480 | struct iter_state *st = seq->private; | |
e8179610 | 1481 | struct net *net = seq_file_net(seq); |
838ab636 HW |
1482 | |
1483 | h = h->next; | |
1484 | while (!h) { | |
e8179610 G |
1485 | struct nfnl_queue_net *q; |
1486 | ||
838ab636 HW |
1487 | if (++st->bucket >= INSTANCE_BUCKETS) |
1488 | return NULL; | |
1489 | ||
e8179610 G |
1490 | q = nfnl_queue_pernet(net); |
1491 | h = q->instance_table[st->bucket].first; | |
838ab636 HW |
1492 | } |
1493 | return h; | |
1494 | } | |
1495 | ||
1496 | static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos) | |
1497 | { | |
1498 | struct hlist_node *head; | |
1499 | head = get_first(seq); | |
1500 | ||
1501 | if (head) | |
1502 | while (pos && (head = get_next(seq, head))) | |
1503 | pos--; | |
1504 | return pos ? NULL : head; | |
1505 | } | |
1506 | ||
e8179610 G |
1507 | static void *seq_start(struct seq_file *s, loff_t *pos) |
1508 | __acquires(nfnl_queue_pernet(seq_file_net(s))->instances_lock) | |
838ab636 | 1509 | { |
e8179610 G |
1510 | spin_lock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
1511 | return get_idx(s, *pos); | |
838ab636 HW |
1512 | } |
1513 | ||
1514 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) | |
1515 | { | |
1516 | (*pos)++; | |
1517 | return get_next(s, v); | |
1518 | } | |
1519 | ||
1520 | static void seq_stop(struct seq_file *s, void *v) | |
e8179610 | 1521 | __releases(nfnl_queue_pernet(seq_file_net(s))->instances_lock) |
838ab636 | 1522 | { |
e8179610 | 1523 | spin_unlock(&nfnl_queue_pernet(seq_file_net(s))->instances_lock); |
838ab636 HW |
1524 | } |
1525 | ||
1526 | static int seq_show(struct seq_file *s, void *v) | |
1527 | { | |
1528 | const struct nfqnl_instance *inst = v; | |
1529 | ||
6b46f7b7 | 1530 | seq_printf(s, "%5u %6u %5u %1u %5u %5u %5u %8u %2d\n", |
e71456ae SRRH |
1531 | inst->queue_num, |
1532 | inst->peer_portid, inst->queue_total, | |
1533 | inst->copy_mode, inst->copy_range, | |
1534 | inst->queue_dropped, inst->queue_user_dropped, | |
1535 | inst->id_sequence, 1); | |
861fb107 | 1536 | return 0; |
838ab636 HW |
1537 | } |
1538 | ||
56b3d975 | 1539 | static const struct seq_operations nfqnl_seq_ops = { |
838ab636 HW |
1540 | .start = seq_start, |
1541 | .next = seq_next, | |
1542 | .stop = seq_stop, | |
1543 | .show = seq_show, | |
1544 | }; | |
838ab636 HW |
1545 | #endif /* PROC_FS */ |
1546 | ||
e8179610 | 1547 | static int __net_init nfnl_queue_net_init(struct net *net) |
7af4cc3f | 1548 | { |
e8179610 G |
1549 | unsigned int i; |
1550 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); | |
601e68e1 | 1551 | |
838ab636 | 1552 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
e8179610 G |
1553 | INIT_HLIST_HEAD(&q->instance_table[i]); |
1554 | ||
1555 | spin_lock_init(&q->instances_lock); | |
1556 | ||
1557 | #ifdef CONFIG_PROC_FS | |
c3506372 CH |
1558 | if (!proc_create_net("nfnetlink_queue", 0440, net->nf.proc_netfilter, |
1559 | &nfqnl_seq_ops, sizeof(struct iter_state))) | |
e8179610 G |
1560 | return -ENOMEM; |
1561 | #endif | |
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | static void __net_exit nfnl_queue_net_exit(struct net *net) | |
1566 | { | |
613d0776 VA |
1567 | struct nfnl_queue_net *q = nfnl_queue_pernet(net); |
1568 | unsigned int i; | |
1569 | ||
e778f56e | 1570 | #ifdef CONFIG_PROC_FS |
e8179610 | 1571 | remove_proc_entry("nfnetlink_queue", net->nf.proc_netfilter); |
e778f56e | 1572 | #endif |
613d0776 VA |
1573 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
1574 | WARN_ON_ONCE(!hlist_empty(&q->instance_table[i])); | |
e8179610 G |
1575 | } |
1576 | ||
1577 | static struct pernet_operations nfnl_queue_net_ops = { | |
dc3ee32e EB |
1578 | .init = nfnl_queue_net_init, |
1579 | .exit = nfnl_queue_net_exit, | |
dc3ee32e EB |
1580 | .id = &nfnl_queue_net_id, |
1581 | .size = sizeof(struct nfnl_queue_net), | |
e8179610 G |
1582 | }; |
1583 | ||
1584 | static int __init nfnetlink_queue_init(void) | |
1585 | { | |
3bfe0498 FR |
1586 | int status; |
1587 | ||
1588 | status = register_pernet_subsys(&nfnl_queue_net_ops); | |
1589 | if (status < 0) { | |
5191d70f | 1590 | pr_err("failed to register pernet ops\n"); |
3bfe0498 FR |
1591 | goto out; |
1592 | } | |
838ab636 | 1593 | |
7af4cc3f HW |
1594 | netlink_register_notifier(&nfqnl_rtnl_notifier); |
1595 | status = nfnetlink_subsys_register(&nfqnl_subsys); | |
1596 | if (status < 0) { | |
5191d70f | 1597 | pr_err("failed to create netlink socket\n"); |
7af4cc3f HW |
1598 | goto cleanup_netlink_notifier; |
1599 | } | |
1600 | ||
4e6577de GF |
1601 | status = register_netdevice_notifier(&nfqnl_dev_notifier); |
1602 | if (status < 0) { | |
5191d70f | 1603 | pr_err("failed to register netdevice notifier\n"); |
4e6577de GF |
1604 | goto cleanup_netlink_subsys; |
1605 | } | |
1606 | ||
87029970 FW |
1607 | nf_register_queue_handler(&nfqh); |
1608 | ||
7af4cc3f HW |
1609 | return status; |
1610 | ||
4e6577de GF |
1611 | cleanup_netlink_subsys: |
1612 | nfnetlink_subsys_unregister(&nfqnl_subsys); | |
7af4cc3f HW |
1613 | cleanup_netlink_notifier: |
1614 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
639e077b | 1615 | unregister_pernet_subsys(&nfnl_queue_net_ops); |
3bfe0498 | 1616 | out: |
7af4cc3f HW |
1617 | return status; |
1618 | } | |
1619 | ||
65b4b4e8 | 1620 | static void __exit nfnetlink_queue_fini(void) |
7af4cc3f | 1621 | { |
87029970 | 1622 | nf_unregister_queue_handler(); |
32292a7f | 1623 | unregister_netdevice_notifier(&nfqnl_dev_notifier); |
32292a7f PM |
1624 | nfnetlink_subsys_unregister(&nfqnl_subsys); |
1625 | netlink_unregister_notifier(&nfqnl_rtnl_notifier); | |
3bfe0498 | 1626 | unregister_pernet_subsys(&nfnl_queue_net_ops); |
67137f3c JDB |
1627 | |
1628 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ | |
7af4cc3f HW |
1629 | } |
1630 | ||
1631 | MODULE_DESCRIPTION("netfilter packet queue handler"); | |
1632 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); | |
1633 | MODULE_LICENSE("GPL"); | |
1634 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE); | |
1635 | ||
65b4b4e8 AM |
1636 | module_init(nfnetlink_queue_init); |
1637 | module_exit(nfnetlink_queue_fini); |