2005-08-10 02:44:15 +00:00
|
|
|
/*
|
|
|
|
* This is a module which is used for queueing packets and communicating with
|
2009-06-08 03:11:33 +00:00
|
|
|
* userspace via nfnetlink.
|
2005-08-10 02:44:15 +00:00
|
|
|
*
|
|
|
|
* (C) 2005 by Harald Welte <laforge@netfilter.org>
|
2007-12-05 09:31:17 +00:00
|
|
|
* (C) 2007 by Patrick McHardy <kaber@trash.net>
|
2005-08-10 02:44:15 +00:00
|
|
|
*
|
|
|
|
* Based on the old ipv4-only ip_queue.c:
|
|
|
|
* (C) 2000-2002 James Morris <jmorris@intercode.com.au>
|
|
|
|
* (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/spinlock.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
|
|
|
#include <linux/slab.h>
|
2005-08-10 02:44:15 +00:00
|
|
|
#include <linux/notifier.h>
|
|
|
|
#include <linux/netdevice.h>
|
|
|
|
#include <linux/netfilter.h>
|
2005-08-10 02:50:45 +00:00
|
|
|
#include <linux/proc_fs.h>
|
2005-08-10 02:44:15 +00:00
|
|
|
#include <linux/netfilter_ipv4.h>
|
|
|
|
#include <linux/netfilter_ipv6.h>
|
|
|
|
#include <linux/netfilter/nfnetlink.h>
|
|
|
|
#include <linux/netfilter/nfnetlink_queue.h>
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include <net/sock.h>
|
2007-12-05 09:24:48 +00:00
|
|
|
#include <net/netfilter/nf_queue.h>
|
2012-06-19 00:10:57 +00:00
|
|
|
#include <net/netfilter/nfnetlink_queue.h>
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2011-07-26 23:09:06 +00:00
|
|
|
#include <linux/atomic.h>
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2005-08-10 03:22:10 +00:00
|
|
|
#ifdef CONFIG_BRIDGE_NETFILTER
|
|
|
|
#include "../bridge/br_private.h"
|
|
|
|
#endif
|
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
#define NFQNL_QMAX_DEFAULT 1024
|
|
|
|
|
|
|
|
struct nfqnl_instance {
|
|
|
|
struct hlist_node hlist; /* global list of queues */
|
2007-12-05 09:28:50 +00:00
|
|
|
struct rcu_head rcu;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2012-09-07 20:12:54 +00:00
|
|
|
int peer_portid;
|
2005-08-10 02:44:15 +00:00
|
|
|
unsigned int queue_maxlen;
|
|
|
|
unsigned int copy_range;
|
|
|
|
unsigned int queue_dropped;
|
|
|
|
unsigned int queue_user_dropped;
|
|
|
|
|
|
|
|
|
|
|
|
u_int16_t queue_num; /* number of this queue */
|
|
|
|
u_int8_t copy_mode;
|
2012-05-24 03:56:44 +00:00
|
|
|
u_int32_t flags; /* Set using NFQA_CFG_FLAGS */
|
2010-06-09 16:07:06 +00:00
|
|
|
/*
|
|
|
|
* Following fields are dirtied for each queued packet,
|
|
|
|
* keep them in same cache line if possible.
|
|
|
|
*/
|
|
|
|
spinlock_t lock;
|
|
|
|
unsigned int queue_total;
|
2011-07-19 09:44:17 +00:00
|
|
|
unsigned int id_sequence; /* 'sequence' of pkt ids */
|
2005-08-10 02:44:15 +00:00
|
|
|
struct list_head queue_list; /* packets in queue */
|
|
|
|
};
|
|
|
|
|
2007-12-05 09:26:33 +00:00
|
|
|
typedef int (*nfqnl_cmpfn)(struct nf_queue_entry *, unsigned long);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
static DEFINE_SPINLOCK(instances_lock);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
#define INSTANCE_BUCKETS 16
|
2007-12-05 09:29:38 +00:00
|
|
|
static struct hlist_head instance_table[INSTANCE_BUCKETS] __read_mostly;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
static inline u_int8_t instance_hashfn(u_int16_t queue_num)
|
|
|
|
{
|
|
|
|
return ((queue_num >> 8) | queue_num) % INSTANCE_BUCKETS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct nfqnl_instance *
|
2007-12-05 09:28:50 +00:00
|
|
|
instance_lookup(u_int16_t queue_num)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
|
|
|
struct hlist_head *head;
|
|
|
|
struct hlist_node *pos;
|
|
|
|
struct nfqnl_instance *inst;
|
|
|
|
|
|
|
|
head = &instance_table[instance_hashfn(queue_num)];
|
2007-12-05 09:28:50 +00:00
|
|
|
hlist_for_each_entry_rcu(inst, pos, head, hlist) {
|
2005-08-10 02:44:15 +00:00
|
|
|
if (inst->queue_num == queue_num)
|
|
|
|
return inst;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct nfqnl_instance *
|
2012-09-07 20:12:54 +00:00
|
|
|
instance_create(u_int16_t queue_num, int portid)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2007-12-18 06:41:21 +00:00
|
|
|
struct nfqnl_instance *inst;
|
2007-12-05 09:28:50 +00:00
|
|
|
unsigned int h;
|
2007-12-18 06:41:21 +00:00
|
|
|
int err;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_lock(&instances_lock);
|
2007-12-18 06:41:21 +00:00
|
|
|
if (instance_lookup(queue_num)) {
|
|
|
|
err = -EEXIST;
|
2005-08-10 02:44:15 +00:00
|
|
|
goto out_unlock;
|
2007-12-18 06:41:21 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2005-11-03 18:20:07 +00:00
|
|
|
inst = kzalloc(sizeof(*inst), GFP_ATOMIC);
|
2007-12-18 06:41:21 +00:00
|
|
|
if (!inst) {
|
|
|
|
err = -ENOMEM;
|
2005-08-10 02:44:15 +00:00
|
|
|
goto out_unlock;
|
2007-12-18 06:41:21 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
inst->queue_num = queue_num;
|
2012-09-07 20:12:54 +00:00
|
|
|
inst->peer_portid = portid;
|
2005-08-10 02:44:15 +00:00
|
|
|
inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
|
|
|
|
inst->copy_range = 0xfffff;
|
|
|
|
inst->copy_mode = NFQNL_COPY_NONE;
|
2006-01-04 21:56:54 +00:00
|
|
|
spin_lock_init(&inst->lock);
|
2005-08-10 02:44:15 +00:00
|
|
|
INIT_LIST_HEAD(&inst->queue_list);
|
|
|
|
|
2007-12-18 06:41:21 +00:00
|
|
|
if (!try_module_get(THIS_MODULE)) {
|
|
|
|
err = -EAGAIN;
|
2005-08-10 02:44:15 +00:00
|
|
|
goto out_free;
|
2007-12-18 06:41:21 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
h = instance_hashfn(queue_num);
|
|
|
|
hlist_add_head_rcu(&inst->hlist, &instance_table[h]);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_unlock(&instances_lock);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
return inst;
|
|
|
|
|
|
|
|
out_free:
|
|
|
|
kfree(inst);
|
|
|
|
out_unlock:
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_unlock(&instances_lock);
|
2007-12-18 06:41:21 +00:00
|
|
|
return ERR_PTR(err);
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2007-12-05 09:25:30 +00:00
|
|
|
static void nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
|
|
|
|
unsigned long data);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
static void
|
2007-12-05 09:28:50 +00:00
|
|
|
instance_destroy_rcu(struct rcu_head *head)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2007-12-05 09:28:50 +00:00
|
|
|
struct nfqnl_instance *inst = container_of(head, struct nfqnl_instance,
|
|
|
|
rcu);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:25:30 +00:00
|
|
|
nfqnl_flush(inst, NULL, 0);
|
2007-12-05 09:28:50 +00:00
|
|
|
kfree(inst);
|
2005-08-10 02:44:15 +00:00
|
|
|
module_put(THIS_MODULE);
|
|
|
|
}
|
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
static void
|
2005-08-10 02:44:15 +00:00
|
|
|
__instance_destroy(struct nfqnl_instance *inst)
|
|
|
|
{
|
2007-12-05 09:28:50 +00:00
|
|
|
hlist_del_rcu(&inst->hlist);
|
|
|
|
call_rcu(&inst->rcu, instance_destroy_rcu);
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
static void
|
2005-08-10 02:44:15 +00:00
|
|
|
instance_destroy(struct nfqnl_instance *inst)
|
|
|
|
{
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_lock(&instances_lock);
|
|
|
|
__instance_destroy(inst);
|
|
|
|
spin_unlock(&instances_lock);
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void
|
2007-12-05 09:26:33 +00:00
|
|
|
__enqueue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2007-12-05 09:25:03 +00:00
|
|
|
list_add_tail(&entry->list, &queue->queue_list);
|
2005-08-10 02:44:15 +00:00
|
|
|
queue->queue_total++;
|
|
|
|
}
|
|
|
|
|
2011-07-19 09:46:33 +00:00
|
|
|
static void
|
|
|
|
__dequeue_entry(struct nfqnl_instance *queue, struct nf_queue_entry *entry)
|
|
|
|
{
|
|
|
|
list_del(&entry->list);
|
|
|
|
queue->queue_total--;
|
|
|
|
}
|
|
|
|
|
2007-12-05 09:26:33 +00:00
|
|
|
static struct nf_queue_entry *
|
2007-12-05 09:25:30 +00:00
|
|
|
find_dequeue_entry(struct nfqnl_instance *queue, unsigned int id)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2007-12-05 09:26:33 +00:00
|
|
|
struct nf_queue_entry *entry = NULL, *i;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
spin_lock_bh(&queue->lock);
|
2007-12-05 09:25:30 +00:00
|
|
|
|
|
|
|
list_for_each_entry(i, &queue->queue_list, list) {
|
|
|
|
if (i->id == id) {
|
|
|
|
entry = i;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-07-19 09:46:33 +00:00
|
|
|
if (entry)
|
|
|
|
__dequeue_entry(queue, entry);
|
2007-12-05 09:25:30 +00:00
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
spin_unlock_bh(&queue->lock);
|
|
|
|
|
|
|
|
return entry;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2007-12-05 09:25:30 +00:00
|
|
|
nfqnl_flush(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn, unsigned long data)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2007-12-05 09:26:33 +00:00
|
|
|
struct nf_queue_entry *entry, *next;
|
2007-12-05 09:25:30 +00:00
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
spin_lock_bh(&queue->lock);
|
2007-12-05 09:25:30 +00:00
|
|
|
list_for_each_entry_safe(entry, next, &queue->queue_list, list) {
|
|
|
|
if (!cmpfn || cmpfn(entry, data)) {
|
|
|
|
list_del(&entry->list);
|
|
|
|
queue->queue_total--;
|
2007-12-05 09:27:02 +00:00
|
|
|
nf_reinject(entry, NF_DROP);
|
2007-12-05 09:25:30 +00:00
|
|
|
}
|
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
spin_unlock_bh(&queue->lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *
|
|
|
|
nfqnl_build_packet_message(struct nfqnl_instance *queue,
|
2011-07-19 09:44:17 +00:00
|
|
|
struct nf_queue_entry *entry,
|
|
|
|
__be32 **packet_id_ptr)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2007-04-20 03:29:13 +00:00
|
|
|
sk_buff_data_t old_tail;
|
2005-08-10 02:44:15 +00:00
|
|
|
size_t size;
|
2012-09-24 12:52:12 +00:00
|
|
|
size_t data_len = 0, cap_len = 0;
|
2005-08-10 02:44:15 +00:00
|
|
|
struct sk_buff *skb;
|
2011-07-19 09:44:17 +00:00
|
|
|
struct nlattr *nla;
|
|
|
|
struct nfqnl_msg_packet_hdr *pmsg;
|
2005-08-10 02:44:15 +00:00
|
|
|
struct nlmsghdr *nlh;
|
|
|
|
struct nfgenmsg *nfmsg;
|
2006-01-05 20:15:58 +00:00
|
|
|
struct sk_buff *entskb = entry->skb;
|
|
|
|
struct net_device *indev;
|
|
|
|
struct net_device *outdev;
|
2012-06-07 10:13:39 +00:00
|
|
|
struct nf_conn *ct = NULL;
|
|
|
|
enum ip_conntrack_info uninitialized_var(ctinfo);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2008-03-10 23:41:43 +00:00
|
|
|
size = NLMSG_SPACE(sizeof(struct nfgenmsg))
|
2007-09-28 21:37:03 +00:00
|
|
|
+ nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
|
|
|
|
+ nla_total_size(sizeof(u_int32_t)) /* ifindex */
|
|
|
|
+ nla_total_size(sizeof(u_int32_t)) /* ifindex */
|
2005-08-10 03:22:10 +00:00
|
|
|
#ifdef CONFIG_BRIDGE_NETFILTER
|
2007-09-28 21:37:03 +00:00
|
|
|
+ nla_total_size(sizeof(u_int32_t)) /* ifindex */
|
|
|
|
+ nla_total_size(sizeof(u_int32_t)) /* ifindex */
|
2005-08-10 03:22:10 +00:00
|
|
|
#endif
|
2007-09-28 21:37:03 +00:00
|
|
|
+ nla_total_size(sizeof(u_int32_t)) /* mark */
|
|
|
|
+ nla_total_size(sizeof(struct nfqnl_msg_packet_hw))
|
2012-09-24 12:52:12 +00:00
|
|
|
+ nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp)
|
|
|
|
+ nla_total_size(sizeof(u_int32_t))); /* cap_len */
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:26:33 +00:00
|
|
|
outdev = entry->outdev;
|
2006-01-05 20:15:58 +00:00
|
|
|
|
2010-06-09 16:07:06 +00:00
|
|
|
switch ((enum nfqnl_config_mode)ACCESS_ONCE(queue->copy_mode)) {
|
2005-08-10 02:44:15 +00:00
|
|
|
case NFQNL_COPY_META:
|
|
|
|
case NFQNL_COPY_NONE:
|
|
|
|
break;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
case NFQNL_COPY_PACKET:
|
2010-04-08 12:54:35 +00:00
|
|
|
if (entskb->ip_summed == CHECKSUM_PARTIAL &&
|
2010-06-09 16:07:06 +00:00
|
|
|
skb_checksum_help(entskb))
|
2005-09-06 22:10:00 +00:00
|
|
|
return NULL;
|
2010-06-09 16:07:06 +00:00
|
|
|
|
|
|
|
data_len = ACCESS_ONCE(queue->copy_range);
|
|
|
|
if (data_len == 0 || data_len > entskb->len)
|
2006-01-05 20:15:58 +00:00
|
|
|
data_len = entskb->len;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
size += nla_total_size(data_len);
|
2012-09-24 12:52:12 +00:00
|
|
|
cap_len = entskb->len;
|
2005-08-10 02:44:15 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2012-06-19 00:10:57 +00:00
|
|
|
if (queue->flags & NFQA_CFG_F_CONNTRACK)
|
|
|
|
ct = nfqnl_ct_get(entskb, &size, &ctinfo);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
skb = alloc_skb(size, GFP_ATOMIC);
|
|
|
|
if (!skb)
|
2012-06-27 04:35:27 +00:00
|
|
|
return NULL;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2007-04-20 03:29:13 +00:00
|
|
|
old_tail = skb->tail;
|
2012-06-27 04:35:27 +00:00
|
|
|
nlh = nlmsg_put(skb, 0, 0,
|
2005-08-10 02:44:15 +00:00
|
|
|
NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
|
2012-06-27 04:35:27 +00:00
|
|
|
sizeof(struct nfgenmsg), 0);
|
|
|
|
if (!nlh) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
nfmsg = nlmsg_data(nlh);
|
2007-12-05 09:26:33 +00:00
|
|
|
nfmsg->nfgen_family = entry->pf;
|
2005-08-10 02:44:15 +00:00
|
|
|
nfmsg->version = NFNETLINK_V0;
|
|
|
|
nfmsg->res_id = htons(queue->queue_num);
|
|
|
|
|
2011-07-19 09:44:17 +00:00
|
|
|
nla = __nla_reserve(skb, NFQA_PACKET_HDR, sizeof(*pmsg));
|
|
|
|
pmsg = nla_data(nla);
|
|
|
|
pmsg->hw_protocol = entskb->protocol;
|
|
|
|
pmsg->hook = entry->hook;
|
|
|
|
*packet_id_ptr = &pmsg->packet_id;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:26:33 +00:00
|
|
|
indev = entry->indev;
|
2006-01-05 20:15:58 +00:00
|
|
|
if (indev) {
|
2005-08-10 03:22:10 +00:00
|
|
|
#ifndef CONFIG_BRIDGE_NETFILTER
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put_be32(skb, NFQA_IFINDEX_INDEV, htonl(indev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 03:22:10 +00:00
|
|
|
#else
|
2007-12-05 09:26:33 +00:00
|
|
|
if (entry->pf == PF_BRIDGE) {
|
2005-08-10 03:22:10 +00:00
|
|
|
/* Case 1: indev is physical input device, we need to
|
2007-02-12 19:15:49 +00:00
|
|
|
* look for bridge group (when called from
|
2005-08-10 03:22:10 +00:00
|
|
|
* netfilter_bridge) */
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
|
|
|
|
htonl(indev->ifindex)) ||
|
2005-08-10 03:22:10 +00:00
|
|
|
/* this is the bridge group "brX" */
|
2010-06-15 06:50:45 +00:00
|
|
|
/* rcu_read_lock()ed by __nf_queue */
|
2012-03-30 03:27:38 +00:00
|
|
|
nla_put_be32(skb, NFQA_IFINDEX_INDEV,
|
|
|
|
htonl(br_port_get_rcu(indev)->br->dev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 03:22:10 +00:00
|
|
|
} else {
|
|
|
|
/* Case 2: indev is bridge group, we need to look for
|
|
|
|
* physical device (when called from ipv4) */
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put_be32(skb, NFQA_IFINDEX_INDEV,
|
|
|
|
htonl(indev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
|
|
|
if (entskb->nf_bridge && entskb->nf_bridge->physindev &&
|
|
|
|
nla_put_be32(skb, NFQA_IFINDEX_PHYSINDEV,
|
|
|
|
htonl(entskb->nf_bridge->physindev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 03:22:10 +00:00
|
|
|
}
|
|
|
|
#endif
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2006-01-05 20:15:58 +00:00
|
|
|
if (outdev) {
|
2005-08-10 03:22:10 +00:00
|
|
|
#ifndef CONFIG_BRIDGE_NETFILTER
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV, htonl(outdev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 03:22:10 +00:00
|
|
|
#else
|
2007-12-05 09:26:33 +00:00
|
|
|
if (entry->pf == PF_BRIDGE) {
|
2005-08-10 03:22:10 +00:00
|
|
|
/* Case 1: outdev is physical output device, we need to
|
2007-02-12 19:15:49 +00:00
|
|
|
* look for bridge group (when called from
|
2005-08-10 03:22:10 +00:00
|
|
|
* netfilter_bridge) */
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
|
|
|
|
htonl(outdev->ifindex)) ||
|
2005-08-10 03:22:10 +00:00
|
|
|
/* this is the bridge group "brX" */
|
2010-06-15 06:50:45 +00:00
|
|
|
/* rcu_read_lock()ed by __nf_queue */
|
2012-03-30 03:27:38 +00:00
|
|
|
nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
|
|
|
|
htonl(br_port_get_rcu(outdev)->br->dev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 03:22:10 +00:00
|
|
|
} else {
|
|
|
|
/* Case 2: outdev is bridge group, we need to look for
|
|
|
|
* physical output device (when called from ipv4) */
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put_be32(skb, NFQA_IFINDEX_OUTDEV,
|
|
|
|
htonl(outdev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
|
|
|
if (entskb->nf_bridge && entskb->nf_bridge->physoutdev &&
|
|
|
|
nla_put_be32(skb, NFQA_IFINDEX_PHYSOUTDEV,
|
|
|
|
htonl(entskb->nf_bridge->physoutdev->ifindex)))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 03:22:10 +00:00
|
|
|
}
|
|
|
|
#endif
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2012-03-30 03:27:38 +00:00
|
|
|
if (entskb->mark &&
|
|
|
|
nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark)))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2011-06-16 15:27:04 +00:00
|
|
|
if (indev && entskb->dev &&
|
|
|
|
entskb->mac_header != entskb->network_header) {
|
2005-08-10 02:44:15 +00:00
|
|
|
struct nfqnl_msg_packet_hw phw;
|
2007-09-27 05:13:38 +00:00
|
|
|
int len = dev_parse_header(entskb, phw.hw_addr);
|
|
|
|
if (len) {
|
|
|
|
phw.hw_addrlen = htons(len);
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw))
|
|
|
|
goto nla_put_failure;
|
2007-09-27 05:13:38 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2007-04-19 23:16:32 +00:00
|
|
|
if (entskb->tstamp.tv64) {
|
2005-08-10 02:44:15 +00:00
|
|
|
struct nfqnl_msg_packet_timestamp ts;
|
2007-04-19 23:16:32 +00:00
|
|
|
struct timeval tv = ktime_to_timeval(entskb->tstamp);
|
|
|
|
ts.sec = cpu_to_be64(tv.tv_sec);
|
|
|
|
ts.usec = cpu_to_be64(tv.tv_usec);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2012-03-30 03:27:38 +00:00
|
|
|
if (nla_put(skb, NFQA_TIMESTAMP, sizeof(ts), &ts))
|
|
|
|
goto nla_put_failure;
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (data_len) {
|
2007-09-28 21:37:03 +00:00
|
|
|
struct nlattr *nla;
|
2008-01-31 11:53:27 +00:00
|
|
|
int sz = nla_attr_size(data_len);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
if (skb_tailroom(skb) < nla_total_size(data_len)) {
|
2005-08-10 02:44:15 +00:00
|
|
|
printk(KERN_WARNING "nf_queue: no tailroom!\n");
|
2012-06-27 04:35:27 +00:00
|
|
|
kfree_skb(skb);
|
|
|
|
return NULL;
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len));
|
|
|
|
nla->nla_type = NFQA_PAYLOAD;
|
2008-01-31 11:53:27 +00:00
|
|
|
nla->nla_len = sz;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
if (skb_copy_bits(entskb, 0, nla_data(nla), data_len))
|
2005-08-10 02:44:15 +00:00
|
|
|
BUG();
|
|
|
|
}
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2012-06-19 00:10:57 +00:00
|
|
|
if (ct && nfqnl_ct_put(skb, ct, ctinfo) < 0)
|
|
|
|
goto nla_put_failure;
|
2012-06-07 10:13:39 +00:00
|
|
|
|
2012-09-24 12:52:12 +00:00
|
|
|
if (cap_len > 0 && nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len)))
|
|
|
|
goto nla_put_failure;
|
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
nlh->nlmsg_len = skb->tail - old_tail;
|
|
|
|
return skb;
|
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
nla_put_failure:
|
2012-08-28 03:14:15 +00:00
|
|
|
kfree_skb(skb);
|
2012-05-13 21:56:26 +00:00
|
|
|
net_err_ratelimited("nf_queue: error creating packet message\n");
|
2005-08-10 02:44:15 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2007-12-05 09:26:33 +00:00
|
|
|
nfqnl_enqueue_packet(struct nf_queue_entry *entry, unsigned int queuenum)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
|
|
|
struct sk_buff *nskb;
|
|
|
|
struct nfqnl_instance *queue;
|
2011-01-18 14:27:28 +00:00
|
|
|
int err = -ENOBUFS;
|
2011-07-19 09:44:17 +00:00
|
|
|
__be32 *packet_id_ptr;
|
2012-05-24 03:56:44 +00:00
|
|
|
int failopen = 0;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
/* rcu_read_lock()ed by nf_hook_slow() */
|
|
|
|
queue = instance_lookup(queuenum);
|
2011-01-18 14:27:28 +00:00
|
|
|
if (!queue) {
|
|
|
|
err = -ESRCH;
|
2007-12-05 09:31:01 +00:00
|
|
|
goto err_out;
|
2011-01-18 14:27:28 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2011-01-18 14:27:28 +00:00
|
|
|
if (queue->copy_mode == NFQNL_COPY_NONE) {
|
|
|
|
err = -EINVAL;
|
2007-12-05 09:31:01 +00:00
|
|
|
goto err_out;
|
2011-01-18 14:27:28 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2011-07-19 09:44:17 +00:00
|
|
|
nskb = nfqnl_build_packet_message(queue, entry, &packet_id_ptr);
|
2011-01-18 14:27:28 +00:00
|
|
|
if (nskb == NULL) {
|
|
|
|
err = -ENOMEM;
|
2007-12-05 09:31:01 +00:00
|
|
|
goto err_out;
|
2011-01-18 14:27:28 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
spin_lock_bh(&queue->lock);
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2012-09-07 20:12:54 +00:00
|
|
|
if (!queue->peer_portid) {
|
2011-01-18 14:27:28 +00:00
|
|
|
err = -EINVAL;
|
2007-02-12 19:15:49 +00:00
|
|
|
goto err_out_free_nskb;
|
2011-01-18 14:27:28 +00:00
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
if (queue->queue_total >= queue->queue_maxlen) {
|
2012-05-24 03:56:44 +00:00
|
|
|
if (queue->flags & NFQA_CFG_F_FAIL_OPEN) {
|
|
|
|
failopen = 1;
|
|
|
|
err = 0;
|
|
|
|
} else {
|
|
|
|
queue->queue_dropped++;
|
|
|
|
net_warn_ratelimited("nf_queue: full at %d entries, dropping packets(s)\n",
|
|
|
|
queue->queue_total);
|
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
goto err_out_free_nskb;
|
|
|
|
}
|
2011-07-19 09:44:17 +00:00
|
|
|
entry->id = ++queue->id_sequence;
|
|
|
|
*packet_id_ptr = htonl(entry->id);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
/* nfnetlink_unicast will either free the nskb or add it to a socket */
|
2012-09-07 20:12:54 +00:00
|
|
|
err = nfnetlink_unicast(nskb, &init_net, queue->peer_portid, MSG_DONTWAIT);
|
2007-12-05 09:31:01 +00:00
|
|
|
if (err < 0) {
|
2007-02-12 19:15:49 +00:00
|
|
|
queue->queue_user_dropped++;
|
2005-08-10 02:44:15 +00:00
|
|
|
goto err_out_unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
__enqueue_entry(queue, entry);
|
|
|
|
|
|
|
|
spin_unlock_bh(&queue->lock);
|
2007-12-05 09:31:01 +00:00
|
|
|
return 0;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
err_out_free_nskb:
|
2007-02-12 19:15:49 +00:00
|
|
|
kfree_skb(nskb);
|
2005-08-10 02:44:15 +00:00
|
|
|
err_out_unlock:
|
|
|
|
spin_unlock_bh(&queue->lock);
|
2012-05-24 03:56:44 +00:00
|
|
|
if (failopen)
|
|
|
|
nf_reinject(entry, NF_ACCEPT);
|
2007-12-05 09:31:01 +00:00
|
|
|
err_out:
|
2011-01-18 14:27:28 +00:00
|
|
|
return err;
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2012-06-07 11:31:25 +00:00
|
|
|
nfqnl_mangle(void *data, int data_len, struct nf_queue_entry *e, int diff)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2008-02-20 01:17:52 +00:00
|
|
|
struct sk_buff *nskb;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2006-11-15 03:48:09 +00:00
|
|
|
if (diff < 0) {
|
|
|
|
if (pskb_trim(e->skb, data_len))
|
|
|
|
return -ENOMEM;
|
|
|
|
} else if (diff > 0) {
|
2005-08-10 02:44:15 +00:00
|
|
|
if (data_len > 0xFFFF)
|
|
|
|
return -EINVAL;
|
|
|
|
if (diff > skb_tailroom(e->skb)) {
|
netfilter: {nfnetlink,ip,ip6}_queue: fix skb_over_panic when enlarging packets
While reinjecting *bigger* modified versions of IPv6 packets using
libnetfilter_queue, things work fine on a 2.6.24 kernel (2.6.22 too)
but I get the following on recents kernels (2.6.25, trace below is
against today's net-2.6 git tree):
skb_over_panic: text:c04fddb0 len:696 put:632 head:f7592c00 data:f7592c00 tail:0xf7592eb8 end:0xf7592e80 dev:eth0
------------[ cut here ]------------
invalid opcode: 0000 [#1] PREEMPT
Process sendd (pid: 3657, ti=f6014000 task=f77c31d0 task.ti=f6014000)
Stack: c071e638 c04fddb0 000002b8 00000278 f7592c00 f7592c00 f7592eb8 f7592e80
f763c000 f6bc5200 f7592c40 f6015c34 c04cdbfc f6bc5200 00000278 f6015c60
c04fddb0 00000020 f72a10c0 f751b420 00000001 0000000a 000002b8 c065582c
Call Trace:
[<c04fddb0>] ? nfqnl_recv_verdict+0x1c0/0x2e0
[<c04cdbfc>] ? skb_put+0x3c/0x40
[<c04fddb0>] ? nfqnl_recv_verdict+0x1c0/0x2e0
[<c04fd115>] ? nfnetlink_rcv_msg+0xf5/0x160
[<c04fd03e>] ? nfnetlink_rcv_msg+0x1e/0x160
[<c04fd020>] ? nfnetlink_rcv_msg+0x0/0x160
[<c04f8ed7>] ? netlink_rcv_skb+0x77/0xa0
[<c04fcefc>] ? nfnetlink_rcv+0x1c/0x30
[<c04f8c73>] ? netlink_unicast+0x243/0x2b0
[<c04cfaba>] ? memcpy_fromiovec+0x4a/0x70
[<c04f9406>] ? netlink_sendmsg+0x1c6/0x270
[<c04c8244>] ? sock_sendmsg+0xc4/0xf0
[<c011970d>] ? set_next_entity+0x1d/0x50
[<c0133a80>] ? autoremove_wake_function+0x0/0x40
[<c0118f9e>] ? __wake_up_common+0x3e/0x70
[<c0342fbf>] ? n_tty_receive_buf+0x34f/0x1280
[<c011d308>] ? __wake_up+0x68/0x70
[<c02cea47>] ? copy_from_user+0x37/0x70
[<c04cfd7c>] ? verify_iovec+0x2c/0x90
[<c04c837a>] ? sys_sendmsg+0x10a/0x230
[<c011967a>] ? __dequeue_entity+0x2a/0xa0
[<c011970d>] ? set_next_entity+0x1d/0x50
[<c0345397>] ? pty_write+0x47/0x60
[<c033d59b>] ? tty_default_put_char+0x1b/0x20
[<c011d2e9>] ? __wake_up+0x49/0x70
[<c033df99>] ? tty_ldisc_deref+0x39/0x90
[<c033ff20>] ? tty_write+0x1a0/0x1b0
[<c04c93af>] ? sys_socketcall+0x7f/0x260
[<c0102ff9>] ? sysenter_past_esp+0x6a/0x91
[<c05f0000>] ? snd_intel8x0m_probe+0x270/0x6e0
=======================
Code: 00 00 89 5c 24 14 8b 98 9c 00 00 00 89 54 24 0c 89 5c 24 10 8b 40 50 89 4c 24 04 c7 04 24 38 e6 71 c0 89 44 24 08 e8 c4 46 c5 ff <0f> 0b eb fe 55 89 e5 56 89 d6 53 89 c3 83 ec 0c 8b 40 50 39 d0
EIP: [<c04ccdfc>] skb_over_panic+0x5c/0x60 SS:ESP 0068:f6015bf8
Looking at the code, I ended up in nfq_mangle() function (called by
nfqnl_recv_verdict()) which performs a call to skb_copy_expand() due to
the increased size of data passed to the function. AFAICT, it should ask
for 'diff' instead of 'diff - skb_tailroom(e->skb)'. Because the
resulting sk_buff has not enough space to support the skb_put(skb, diff)
call a few lines later, this results in the call to skb_over_panic().
The patch below asks for allocation of a copy with enough space for
mangled packet and the same amount of headroom as old sk_buff. While
looking at how the regression appeared (e2b58a67), I noticed the same
pattern in ipq_mangle_ipv6() and ipq_mangle_ipv4(). The patch corrects
those locations too.
Tested with bigger reinjected IPv6 packets (nfqnl_mangle() path), things
are ok (2.6.25 and today's net-2.6 git tree).
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 10:16:34 +00:00
|
|
|
nskb = skb_copy_expand(e->skb, skb_headroom(e->skb),
|
|
|
|
diff, GFP_ATOMIC);
|
2008-02-20 01:17:52 +00:00
|
|
|
if (!nskb) {
|
2006-08-22 07:32:47 +00:00
|
|
|
printk(KERN_WARNING "nf_queue: OOM "
|
2005-08-10 02:44:15 +00:00
|
|
|
"in mangle, dropping packet\n");
|
2008-02-20 01:17:52 +00:00
|
|
|
return -ENOMEM;
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
2008-02-20 01:17:52 +00:00
|
|
|
kfree_skb(e->skb);
|
|
|
|
e->skb = nskb;
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
skb_put(e->skb, diff);
|
|
|
|
}
|
2007-10-14 07:39:18 +00:00
|
|
|
if (!skb_make_writable(e->skb, data_len))
|
2005-08-10 02:44:15 +00:00
|
|
|
return -ENOMEM;
|
2007-03-31 14:55:19 +00:00
|
|
|
skb_copy_to_linear_data(e->skb, data, data_len);
|
2005-09-06 22:10:00 +00:00
|
|
|
e->skb->ip_summed = CHECKSUM_NONE;
|
2005-08-10 02:44:15 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
nfqnl_set_mode(struct nfqnl_instance *queue,
|
|
|
|
unsigned char mode, unsigned int range)
|
|
|
|
{
|
2007-12-05 09:29:05 +00:00
|
|
|
int status = 0;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
spin_lock_bh(&queue->lock);
|
2007-12-05 09:29:05 +00:00
|
|
|
switch (mode) {
|
|
|
|
case NFQNL_COPY_NONE:
|
|
|
|
case NFQNL_COPY_META:
|
|
|
|
queue->copy_mode = mode;
|
|
|
|
queue->copy_range = 0;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case NFQNL_COPY_PACKET:
|
|
|
|
queue->copy_mode = mode;
|
2012-09-06 15:09:26 +00:00
|
|
|
/* We're using struct nlattr which has 16bit nla_len. Note that
|
|
|
|
* nla_len includes the header length. Thus, the maximum packet
|
|
|
|
* length that we support is 65531 bytes. We send truncated
|
|
|
|
* packets if the specified length is larger than that.
|
|
|
|
*/
|
|
|
|
if (range > 0xffff - NLA_HDRLEN)
|
|
|
|
queue->copy_range = 0xffff - NLA_HDRLEN;
|
2007-12-05 09:29:05 +00:00
|
|
|
else
|
|
|
|
queue->copy_range = range;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
status = -EINVAL;
|
|
|
|
|
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
spin_unlock_bh(&queue->lock);
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2007-12-05 09:26:33 +00:00
|
|
|
dev_cmp(struct nf_queue_entry *entry, unsigned long ifindex)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2007-12-05 09:26:33 +00:00
|
|
|
if (entry->indev)
|
|
|
|
if (entry->indev->ifindex == ifindex)
|
2005-08-10 02:44:15 +00:00
|
|
|
return 1;
|
2007-12-05 09:26:33 +00:00
|
|
|
if (entry->outdev)
|
|
|
|
if (entry->outdev->ifindex == ifindex)
|
2005-08-10 02:44:15 +00:00
|
|
|
return 1;
|
2006-06-27 10:01:48 +00:00
|
|
|
#ifdef CONFIG_BRIDGE_NETFILTER
|
|
|
|
if (entry->skb->nf_bridge) {
|
|
|
|
if (entry->skb->nf_bridge->physindev &&
|
|
|
|
entry->skb->nf_bridge->physindev->ifindex == ifindex)
|
|
|
|
return 1;
|
|
|
|
if (entry->skb->nf_bridge->physoutdev &&
|
|
|
|
entry->skb->nf_bridge->physoutdev->ifindex == ifindex)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
#endif
|
2005-08-10 02:44:15 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* drop all packets with either indev or outdev == ifindex from all queue
|
|
|
|
* instances */
|
|
|
|
static void
|
|
|
|
nfqnl_dev_drop(int ifindex)
|
|
|
|
{
|
|
|
|
int i;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
rcu_read_lock();
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
for (i = 0; i < INSTANCE_BUCKETS; i++) {
|
2005-08-10 02:44:15 +00:00
|
|
|
struct hlist_node *tmp;
|
|
|
|
struct nfqnl_instance *inst;
|
|
|
|
struct hlist_head *head = &instance_table[i];
|
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
hlist_for_each_entry_rcu(inst, tmp, head, hlist)
|
2007-12-05 09:25:30 +00:00
|
|
|
nfqnl_flush(inst, dev_cmp, ifindex);
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
rcu_read_unlock();
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
|
|
|
|
|
|
|
|
static int
|
|
|
|
nfqnl_rcv_dev_event(struct notifier_block *this,
|
|
|
|
unsigned long event, void *ptr)
|
|
|
|
{
|
|
|
|
struct net_device *dev = ptr;
|
|
|
|
|
2008-07-20 05:34:43 +00:00
|
|
|
if (!net_eq(dev_net(dev), &init_net))
|
2007-09-12 11:02:17 +00:00
|
|
|
return NOTIFY_DONE;
|
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
/* Drop any packets associated with the downed device */
|
|
|
|
if (event == NETDEV_DOWN)
|
|
|
|
nfqnl_dev_drop(dev->ifindex);
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block nfqnl_dev_notifier = {
|
|
|
|
.notifier_call = nfqnl_rcv_dev_event,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int
|
|
|
|
nfqnl_rcv_nl_event(struct notifier_block *this,
|
|
|
|
unsigned long event, void *ptr)
|
|
|
|
{
|
|
|
|
struct netlink_notify *n = ptr;
|
|
|
|
|
2009-11-06 16:04:00 +00:00
|
|
|
if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) {
|
2005-08-10 02:44:15 +00:00
|
|
|
int i;
|
|
|
|
|
2012-09-07 20:12:54 +00:00
|
|
|
/* destroy all instances for this portid */
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_lock(&instances_lock);
|
|
|
|
for (i = 0; i < INSTANCE_BUCKETS; i++) {
|
2005-08-10 02:44:15 +00:00
|
|
|
struct hlist_node *tmp, *t2;
|
|
|
|
struct nfqnl_instance *inst;
|
|
|
|
struct hlist_head *head = &instance_table[i];
|
|
|
|
|
|
|
|
hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) {
|
2007-09-12 11:05:38 +00:00
|
|
|
if ((n->net == &init_net) &&
|
2012-09-07 20:12:54 +00:00
|
|
|
(n->portid == inst->peer_portid))
|
2005-08-10 02:44:15 +00:00
|
|
|
__instance_destroy(inst);
|
|
|
|
}
|
|
|
|
}
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_unlock(&instances_lock);
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block nfqnl_rtnl_notifier = {
|
|
|
|
.notifier_call = nfqnl_rcv_nl_event,
|
|
|
|
};
|
|
|
|
|
2007-09-28 21:39:26 +00:00
|
|
|
static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
|
|
|
|
[NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
|
|
|
|
[NFQA_MARK] = { .type = NLA_U32 },
|
|
|
|
[NFQA_PAYLOAD] = { .type = NLA_UNSPEC },
|
2012-06-07 10:13:39 +00:00
|
|
|
[NFQA_CT] = { .type = NLA_UNSPEC },
|
2005-08-10 02:50:45 +00:00
|
|
|
};
|
|
|
|
|
2011-07-19 09:46:33 +00:00
|
|
|
static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = {
|
|
|
|
[NFQA_VERDICT_HDR] = { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
|
|
|
|
[NFQA_MARK] = { .type = NLA_U32 },
|
|
|
|
};
|
|
|
|
|
2012-09-07 20:12:54 +00:00
|
|
|
static struct nfqnl_instance *verdict_instance_lookup(u16 queue_num, int nlportid)
|
2011-07-19 09:46:33 +00:00
|
|
|
{
|
|
|
|
struct nfqnl_instance *queue;
|
|
|
|
|
|
|
|
queue = instance_lookup(queue_num);
|
|
|
|
if (!queue)
|
|
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
|
2012-09-07 20:12:54 +00:00
|
|
|
if (queue->peer_portid != nlportid)
|
2011-07-19 09:46:33 +00:00
|
|
|
return ERR_PTR(-EPERM);
|
|
|
|
|
|
|
|
return queue;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct nfqnl_msg_verdict_hdr*
|
|
|
|
verdicthdr_get(const struct nlattr * const nfqa[])
|
|
|
|
{
|
|
|
|
struct nfqnl_msg_verdict_hdr *vhdr;
|
|
|
|
unsigned int verdict;
|
|
|
|
|
|
|
|
if (!nfqa[NFQA_VERDICT_HDR])
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
vhdr = nla_data(nfqa[NFQA_VERDICT_HDR]);
|
2011-08-30 13:01:20 +00:00
|
|
|
verdict = ntohl(vhdr->verdict) & NF_VERDICT_MASK;
|
|
|
|
if (verdict > NF_MAX_VERDICT || verdict == NF_STOLEN)
|
2011-07-19 09:46:33 +00:00
|
|
|
return NULL;
|
|
|
|
return vhdr;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int nfq_id_after(unsigned int id, unsigned int max)
|
|
|
|
{
|
|
|
|
return (int)(id - max) > 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
nfqnl_recv_verdict_batch(struct sock *ctnl, struct sk_buff *skb,
|
|
|
|
const struct nlmsghdr *nlh,
|
|
|
|
const struct nlattr * const nfqa[])
|
|
|
|
{
|
2012-06-27 04:35:27 +00:00
|
|
|
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
|
2011-07-19 09:46:33 +00:00
|
|
|
struct nf_queue_entry *entry, *tmp;
|
|
|
|
unsigned int verdict, maxid;
|
|
|
|
struct nfqnl_msg_verdict_hdr *vhdr;
|
|
|
|
struct nfqnl_instance *queue;
|
|
|
|
LIST_HEAD(batch_list);
|
|
|
|
u16 queue_num = ntohs(nfmsg->res_id);
|
|
|
|
|
2012-09-07 20:12:54 +00:00
|
|
|
queue = verdict_instance_lookup(queue_num, NETLINK_CB(skb).portid);
|
2011-07-19 09:46:33 +00:00
|
|
|
if (IS_ERR(queue))
|
|
|
|
return PTR_ERR(queue);
|
|
|
|
|
|
|
|
vhdr = verdicthdr_get(nfqa);
|
|
|
|
if (!vhdr)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
verdict = ntohl(vhdr->verdict);
|
|
|
|
maxid = ntohl(vhdr->id);
|
|
|
|
|
|
|
|
spin_lock_bh(&queue->lock);
|
|
|
|
|
|
|
|
list_for_each_entry_safe(entry, tmp, &queue->queue_list, list) {
|
|
|
|
if (nfq_id_after(entry->id, maxid))
|
|
|
|
break;
|
|
|
|
__dequeue_entry(queue, entry);
|
|
|
|
list_add_tail(&entry->list, &batch_list);
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_bh(&queue->lock);
|
|
|
|
|
|
|
|
if (list_empty(&batch_list))
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
list_for_each_entry_safe(entry, tmp, &batch_list, list) {
|
|
|
|
if (nfqa[NFQA_MARK])
|
|
|
|
entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
|
|
|
|
nf_reinject(entry, verdict);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
static int
|
|
|
|
nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
|
2009-08-25 14:07:58 +00:00
|
|
|
const struct nlmsghdr *nlh,
|
|
|
|
const struct nlattr * const nfqa[])
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2012-06-27 04:35:27 +00:00
|
|
|
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
|
2005-08-10 02:44:15 +00:00
|
|
|
u_int16_t queue_num = ntohs(nfmsg->res_id);
|
|
|
|
|
|
|
|
struct nfqnl_msg_verdict_hdr *vhdr;
|
|
|
|
struct nfqnl_instance *queue;
|
|
|
|
unsigned int verdict;
|
2007-12-05 09:26:33 +00:00
|
|
|
struct nf_queue_entry *entry;
|
2012-06-07 11:31:25 +00:00
|
|
|
enum ip_conntrack_info uninitialized_var(ctinfo);
|
|
|
|
struct nf_conn *ct = NULL;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
queue = instance_lookup(queue_num);
|
2011-07-18 14:08:27 +00:00
|
|
|
if (!queue)
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2012-09-07 20:12:54 +00:00
|
|
|
queue = verdict_instance_lookup(queue_num, NETLINK_CB(skb).portid);
|
2011-07-19 09:46:33 +00:00
|
|
|
if (IS_ERR(queue))
|
|
|
|
return PTR_ERR(queue);
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2011-07-19 09:46:33 +00:00
|
|
|
vhdr = verdicthdr_get(nfqa);
|
|
|
|
if (!vhdr)
|
2011-07-18 14:08:27 +00:00
|
|
|
return -EINVAL;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
verdict = ntohl(vhdr->verdict);
|
|
|
|
|
2007-12-05 09:25:30 +00:00
|
|
|
entry = find_dequeue_entry(queue, ntohl(vhdr->id));
|
2011-07-18 14:08:27 +00:00
|
|
|
if (entry == NULL)
|
|
|
|
return -ENOENT;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2012-06-07 10:13:39 +00:00
|
|
|
rcu_read_lock();
|
2012-06-19 00:10:57 +00:00
|
|
|
if (nfqa[NFQA_CT] && (queue->flags & NFQA_CFG_F_CONNTRACK))
|
|
|
|
ct = nfqnl_ct_parse(entry->skb, nfqa[NFQA_CT], &ctinfo);
|
2012-06-07 10:13:39 +00:00
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
if (nfqa[NFQA_PAYLOAD]) {
|
2012-06-07 11:31:25 +00:00
|
|
|
u16 payload_len = nla_len(nfqa[NFQA_PAYLOAD]);
|
|
|
|
int diff = payload_len - entry->skb->len;
|
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
if (nfqnl_mangle(nla_data(nfqa[NFQA_PAYLOAD]),
|
2012-06-07 11:31:25 +00:00
|
|
|
payload_len, entry, diff) < 0)
|
2005-08-10 02:44:15 +00:00
|
|
|
verdict = NF_DROP;
|
2012-06-07 11:31:25 +00:00
|
|
|
|
2012-06-19 00:10:57 +00:00
|
|
|
if (ct)
|
|
|
|
nfqnl_ct_seq_adjust(skb, ct, ctinfo, diff);
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
2012-06-07 11:31:25 +00:00
|
|
|
rcu_read_unlock();
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
if (nfqa[NFQA_MARK])
|
2007-12-05 09:30:02 +00:00
|
|
|
entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2007-12-05 09:27:02 +00:00
|
|
|
nf_reinject(entry, verdict);
|
2005-08-10 02:44:15 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
|
2009-08-25 14:07:58 +00:00
|
|
|
const struct nlmsghdr *nlh,
|
|
|
|
const struct nlattr * const nfqa[])
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
|
|
|
return -ENOTSUPP;
|
|
|
|
}
|
|
|
|
|
2007-09-28 21:39:26 +00:00
|
|
|
static const struct nla_policy nfqa_cfg_policy[NFQA_CFG_MAX+1] = {
|
|
|
|
[NFQA_CFG_CMD] = { .len = sizeof(struct nfqnl_msg_config_cmd) },
|
|
|
|
[NFQA_CFG_PARAMS] = { .len = sizeof(struct nfqnl_msg_config_params) },
|
2005-08-10 02:50:45 +00:00
|
|
|
};
|
|
|
|
|
2007-12-05 09:23:57 +00:00
|
|
|
static const struct nf_queue_handler nfqh = {
|
2005-08-10 03:23:11 +00:00
|
|
|
.name = "nf_queue",
|
|
|
|
.outfn = &nfqnl_enqueue_packet,
|
|
|
|
};
|
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
static int
|
|
|
|
nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
|
2009-08-25 14:07:58 +00:00
|
|
|
const struct nlmsghdr *nlh,
|
|
|
|
const struct nlattr * const nfqa[])
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2012-06-27 04:35:27 +00:00
|
|
|
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
|
2005-08-10 02:44:15 +00:00
|
|
|
u_int16_t queue_num = ntohs(nfmsg->res_id);
|
|
|
|
struct nfqnl_instance *queue;
|
2007-12-05 09:28:50 +00:00
|
|
|
struct nfqnl_msg_config_cmd *cmd = NULL;
|
2005-08-10 02:50:45 +00:00
|
|
|
int ret = 0;
|
2005-08-10 02:44:15 +00:00
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
if (nfqa[NFQA_CFG_CMD]) {
|
|
|
|
cmd = nla_data(nfqa[NFQA_CFG_CMD]);
|
|
|
|
|
|
|
|
/* Commands without queue context - might sleep */
|
|
|
|
switch (cmd->command) {
|
|
|
|
case NFQNL_CFG_CMD_PF_BIND:
|
2008-03-10 23:44:36 +00:00
|
|
|
return nf_register_queue_handler(ntohs(cmd->pf),
|
|
|
|
&nfqh);
|
2007-12-05 09:28:50 +00:00
|
|
|
case NFQNL_CFG_CMD_PF_UNBIND:
|
2008-03-10 23:44:36 +00:00
|
|
|
return nf_unregister_queue_handler(ntohs(cmd->pf),
|
|
|
|
&nfqh);
|
2007-12-05 09:28:50 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
queue = instance_lookup(queue_num);
|
2012-09-07 20:12:54 +00:00
|
|
|
if (queue && queue->peer_portid != NETLINK_CB(skb).portid) {
|
2007-12-05 09:28:30 +00:00
|
|
|
ret = -EPERM;
|
2007-12-05 09:28:50 +00:00
|
|
|
goto err_out_unlock;
|
2007-12-05 09:28:30 +00:00
|
|
|
}
|
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
if (cmd != NULL) {
|
2005-08-10 02:44:15 +00:00
|
|
|
switch (cmd->command) {
|
|
|
|
case NFQNL_CFG_CMD_BIND:
|
2007-12-05 09:28:50 +00:00
|
|
|
if (queue) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto err_out_unlock;
|
|
|
|
}
|
2012-09-07 20:12:54 +00:00
|
|
|
queue = instance_create(queue_num, NETLINK_CB(skb).portid);
|
2007-12-18 06:41:21 +00:00
|
|
|
if (IS_ERR(queue)) {
|
|
|
|
ret = PTR_ERR(queue);
|
2007-12-05 09:28:50 +00:00
|
|
|
goto err_out_unlock;
|
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
break;
|
|
|
|
case NFQNL_CFG_CMD_UNBIND:
|
2007-12-05 09:28:50 +00:00
|
|
|
if (!queue) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto err_out_unlock;
|
|
|
|
}
|
2005-08-10 02:44:15 +00:00
|
|
|
instance_destroy(queue);
|
|
|
|
break;
|
|
|
|
case NFQNL_CFG_CMD_PF_BIND:
|
|
|
|
case NFQNL_CFG_CMD_PF_UNBIND:
|
|
|
|
break;
|
|
|
|
default:
|
2007-12-18 06:40:19 +00:00
|
|
|
ret = -ENOTSUPP;
|
2005-08-10 02:50:45 +00:00
|
|
|
break;
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
if (nfqa[NFQA_CFG_PARAMS]) {
|
2005-08-10 02:44:15 +00:00
|
|
|
struct nfqnl_msg_config_params *params;
|
|
|
|
|
2006-03-13 04:32:47 +00:00
|
|
|
if (!queue) {
|
2007-12-05 09:28:30 +00:00
|
|
|
ret = -ENODEV;
|
2007-12-05 09:28:50 +00:00
|
|
|
goto err_out_unlock;
|
2006-03-13 04:32:47 +00:00
|
|
|
}
|
2007-09-28 21:37:03 +00:00
|
|
|
params = nla_data(nfqa[NFQA_CFG_PARAMS]);
|
2005-08-10 02:44:15 +00:00
|
|
|
nfqnl_set_mode(queue, params->copy_mode,
|
|
|
|
ntohl(params->copy_range));
|
|
|
|
}
|
|
|
|
|
2007-09-28 21:37:03 +00:00
|
|
|
if (nfqa[NFQA_CFG_QUEUE_MAXLEN]) {
|
2006-11-29 01:35:33 +00:00
|
|
|
__be32 *queue_maxlen;
|
2007-12-05 09:28:30 +00:00
|
|
|
|
|
|
|
if (!queue) {
|
|
|
|
ret = -ENODEV;
|
2007-12-05 09:28:50 +00:00
|
|
|
goto err_out_unlock;
|
2007-12-05 09:28:30 +00:00
|
|
|
}
|
2007-09-28 21:37:03 +00:00
|
|
|
queue_maxlen = nla_data(nfqa[NFQA_CFG_QUEUE_MAXLEN]);
|
2006-11-29 01:35:33 +00:00
|
|
|
spin_lock_bh(&queue->lock);
|
|
|
|
queue->queue_maxlen = ntohl(*queue_maxlen);
|
|
|
|
spin_unlock_bh(&queue->lock);
|
|
|
|
}
|
|
|
|
|
2012-05-24 03:56:44 +00:00
|
|
|
if (nfqa[NFQA_CFG_FLAGS]) {
|
|
|
|
__u32 flags, mask;
|
|
|
|
|
|
|
|
if (!queue) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto err_out_unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!nfqa[NFQA_CFG_MASK]) {
|
|
|
|
/* A mask is needed to specify which flags are being
|
|
|
|
* changed.
|
|
|
|
*/
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto err_out_unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
flags = ntohl(nla_get_be32(nfqa[NFQA_CFG_FLAGS]));
|
|
|
|
mask = ntohl(nla_get_be32(nfqa[NFQA_CFG_MASK]));
|
|
|
|
|
2012-06-27 00:59:56 +00:00
|
|
|
if (flags >= NFQA_CFG_F_MAX) {
|
|
|
|
ret = -EOPNOTSUPP;
|
|
|
|
goto err_out_unlock;
|
|
|
|
}
|
|
|
|
|
2012-05-24 03:56:44 +00:00
|
|
|
spin_lock_bh(&queue->lock);
|
|
|
|
queue->flags &= ~mask;
|
|
|
|
queue->flags |= flags & mask;
|
|
|
|
spin_unlock_bh(&queue->lock);
|
|
|
|
}
|
|
|
|
|
2007-12-05 09:28:50 +00:00
|
|
|
err_out_unlock:
|
|
|
|
rcu_read_unlock();
|
2005-08-10 02:50:45 +00:00
|
|
|
return ret;
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
2007-09-28 21:15:45 +00:00
|
|
|
static const struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
|
2011-07-18 14:08:27 +00:00
|
|
|
[NFQNL_MSG_PACKET] = { .call_rcu = nfqnl_recv_unsupp,
|
2005-11-14 23:24:59 +00:00
|
|
|
.attr_count = NFQA_MAX, },
|
2011-07-18 14:08:27 +00:00
|
|
|
[NFQNL_MSG_VERDICT] = { .call_rcu = nfqnl_recv_verdict,
|
2007-09-28 21:39:26 +00:00
|
|
|
.attr_count = NFQA_MAX,
|
|
|
|
.policy = nfqa_verdict_policy },
|
2005-08-10 02:44:15 +00:00
|
|
|
[NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config,
|
2007-09-28 21:39:26 +00:00
|
|
|
.attr_count = NFQA_CFG_MAX,
|
|
|
|
.policy = nfqa_cfg_policy },
|
2011-07-19 09:46:33 +00:00
|
|
|
[NFQNL_MSG_VERDICT_BATCH]={ .call_rcu = nfqnl_recv_verdict_batch,
|
|
|
|
.attr_count = NFQA_MAX,
|
|
|
|
.policy = nfqa_verdict_batch_policy },
|
2005-08-10 02:44:15 +00:00
|
|
|
};
|
|
|
|
|
2007-09-28 21:15:45 +00:00
|
|
|
static const struct nfnetlink_subsystem nfqnl_subsys = {
|
2005-08-10 02:44:15 +00:00
|
|
|
.name = "nf_queue",
|
|
|
|
.subsys_id = NFNL_SUBSYS_QUEUE,
|
|
|
|
.cb_count = NFQNL_MSG_MAX,
|
|
|
|
.cb = nfqnl_cb,
|
|
|
|
};
|
|
|
|
|
2005-08-10 02:50:45 +00:00
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
struct iter_state {
|
|
|
|
unsigned int bucket;
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct hlist_node *get_first(struct seq_file *seq)
|
|
|
|
{
|
|
|
|
struct iter_state *st = seq->private;
|
|
|
|
|
|
|
|
if (!st)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
|
|
|
|
if (!hlist_empty(&instance_table[st->bucket]))
|
|
|
|
return instance_table[st->bucket].first;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
|
|
|
|
{
|
|
|
|
struct iter_state *st = seq->private;
|
|
|
|
|
|
|
|
h = h->next;
|
|
|
|
while (!h) {
|
|
|
|
if (++st->bucket >= INSTANCE_BUCKETS)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
h = instance_table[st->bucket].first;
|
|
|
|
}
|
|
|
|
return h;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
|
|
|
|
{
|
|
|
|
struct hlist_node *head;
|
|
|
|
head = get_first(seq);
|
|
|
|
|
|
|
|
if (head)
|
|
|
|
while (pos && (head = get_next(seq, head)))
|
|
|
|
pos--;
|
|
|
|
return pos ? NULL : head;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void *seq_start(struct seq_file *seq, loff_t *pos)
|
2008-01-31 11:53:27 +00:00
|
|
|
__acquires(instances_lock)
|
2005-08-10 02:50:45 +00:00
|
|
|
{
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_lock(&instances_lock);
|
2005-08-10 02:50:45 +00:00
|
|
|
return get_idx(seq, *pos);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
|
|
|
|
{
|
|
|
|
(*pos)++;
|
|
|
|
return get_next(s, v);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void seq_stop(struct seq_file *s, void *v)
|
2008-01-31 11:53:27 +00:00
|
|
|
__releases(instances_lock)
|
2005-08-10 02:50:45 +00:00
|
|
|
{
|
2007-12-05 09:28:50 +00:00
|
|
|
spin_unlock(&instances_lock);
|
2005-08-10 02:50:45 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int seq_show(struct seq_file *s, void *v)
|
|
|
|
{
|
|
|
|
const struct nfqnl_instance *inst = v;
|
|
|
|
|
|
|
|
return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n",
|
|
|
|
inst->queue_num,
|
2012-09-07 20:12:54 +00:00
|
|
|
inst->peer_portid, inst->queue_total,
|
2005-08-10 02:50:45 +00:00
|
|
|
inst->copy_mode, inst->copy_range,
|
|
|
|
inst->queue_dropped, inst->queue_user_dropped,
|
2011-07-19 09:44:17 +00:00
|
|
|
inst->id_sequence, 1);
|
2005-08-10 02:50:45 +00:00
|
|
|
}
|
|
|
|
|
2007-07-11 06:07:31 +00:00
|
|
|
static const struct seq_operations nfqnl_seq_ops = {
|
2005-08-10 02:50:45 +00:00
|
|
|
.start = seq_start,
|
|
|
|
.next = seq_next,
|
|
|
|
.stop = seq_stop,
|
|
|
|
.show = seq_show,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int nfqnl_open(struct inode *inode, struct file *file)
|
|
|
|
{
|
2007-10-10 09:29:58 +00:00
|
|
|
return seq_open_private(file, &nfqnl_seq_ops,
|
|
|
|
sizeof(struct iter_state));
|
2005-08-10 02:50:45 +00:00
|
|
|
}
|
|
|
|
|
2007-02-12 08:55:36 +00:00
|
|
|
static const struct file_operations nfqnl_file_ops = {
|
2005-08-10 02:50:45 +00:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.open = nfqnl_open,
|
|
|
|
.read = seq_read,
|
|
|
|
.llseek = seq_lseek,
|
|
|
|
.release = seq_release_private,
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif /* PROC_FS */
|
|
|
|
|
2006-04-06 21:11:30 +00:00
|
|
|
static int __init nfnetlink_queue_init(void)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2005-08-10 02:50:45 +00:00
|
|
|
int i, status = -ENOMEM;
|
2007-02-12 19:15:49 +00:00
|
|
|
|
2005-08-10 02:50:45 +00:00
|
|
|
for (i = 0; i < INSTANCE_BUCKETS; i++)
|
|
|
|
INIT_HLIST_HEAD(&instance_table[i]);
|
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
netlink_register_notifier(&nfqnl_rtnl_notifier);
|
|
|
|
status = nfnetlink_subsys_register(&nfqnl_subsys);
|
|
|
|
if (status < 0) {
|
|
|
|
printk(KERN_ERR "nf_queue: failed to create netlink socket\n");
|
|
|
|
goto cleanup_netlink_notifier;
|
|
|
|
}
|
|
|
|
|
2005-08-10 02:50:45 +00:00
|
|
|
#ifdef CONFIG_PROC_FS
|
2008-03-27 23:55:53 +00:00
|
|
|
if (!proc_create("nfnetlink_queue", 0440,
|
|
|
|
proc_net_netfilter, &nfqnl_file_ops))
|
2005-08-10 02:50:45 +00:00
|
|
|
goto cleanup_subsys;
|
|
|
|
#endif
|
|
|
|
|
2005-08-10 02:44:15 +00:00
|
|
|
register_netdevice_notifier(&nfqnl_dev_notifier);
|
|
|
|
return status;
|
|
|
|
|
2005-08-10 02:50:45 +00:00
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
cleanup_subsys:
|
2005-08-10 02:44:15 +00:00
|
|
|
nfnetlink_subsys_unregister(&nfqnl_subsys);
|
2006-04-06 21:11:30 +00:00
|
|
|
#endif
|
2005-08-10 02:44:15 +00:00
|
|
|
cleanup_netlink_notifier:
|
|
|
|
netlink_unregister_notifier(&nfqnl_rtnl_notifier);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2006-03-29 00:37:06 +00:00
|
|
|
static void __exit nfnetlink_queue_fini(void)
|
2005-08-10 02:44:15 +00:00
|
|
|
{
|
2006-04-06 21:11:30 +00:00
|
|
|
nf_unregister_queue_handlers(&nfqh);
|
|
|
|
unregister_netdevice_notifier(&nfqnl_dev_notifier);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
remove_proc_entry("nfnetlink_queue", proc_net_netfilter);
|
|
|
|
#endif
|
|
|
|
nfnetlink_subsys_unregister(&nfqnl_subsys);
|
|
|
|
netlink_unregister_notifier(&nfqnl_rtnl_notifier);
|
2009-06-08 03:11:33 +00:00
|
|
|
|
|
|
|
rcu_barrier(); /* Wait for completion of call_rcu()'s */
|
2005-08-10 02:44:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("netfilter packet queue handler");
|
|
|
|
MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
|
|
|
|
|
2006-03-29 00:37:06 +00:00
|
|
|
module_init(nfnetlink_queue_init);
|
|
|
|
module_exit(nfnetlink_queue_fini);
|