File: [Development] / linux-2.6-xfs / net / netfilter / xt_multiport.c (download)
Revision 1.6, Wed Sep 12 17:09:56 2007 UTC (10 years, 1 month ago) by tes.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.5: +27 -27
lines
Update 2.6.x-xfs to 2.6.23-rc4.
Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:
--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
xfs ioctl __user annotations
commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
mm: Remove slab destructors from kmem_cache_create().
commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
mm: fault feedback #1
commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
mm: merge populate and nopage into fault (fixes nonlinear)
commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
mm: fix fault vs invalidate race for linear mappings
commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
knfsd: exportfs: add exportfs.h header
commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
Freezer: make kernel threads nonfreezable by default
commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
mm: clean up and kernelify shrinker registration
commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
sendfile: remove .sendfile from filesystems that use generic_file_sendfile()
commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
Add suspend-related notifications for CPU hotplug
commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
Fix occurrences of "the the "
commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.
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/* Kernel module to match one of a list of TCP/UDP(-Lite)/SCTP/DCCP ports:
ports are in the same place so we can treat them as equal. */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2004 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/types.h>
#include <linux/udp.h>
#include <linux/skbuff.h>
#include <linux/in.h>
#include <linux/netfilter/xt_multiport.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("x_tables multiple port match module");
MODULE_ALIAS("ipt_multiport");
MODULE_ALIAS("ip6t_multiport");
#if 0
#define duprintf(format, args...) printk(format , ## args)
#else
#define duprintf(format, args...)
#endif
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline bool
ports_match(const u_int16_t *portlist, enum xt_multiport_flags flags,
u_int8_t count, u_int16_t src, u_int16_t dst)
{
unsigned int i;
for (i = 0; i < count; i++) {
if (flags != XT_MULTIPORT_DESTINATION && portlist[i] == src)
return true;
if (flags != XT_MULTIPORT_SOURCE && portlist[i] == dst)
return true;
}
return false;
}
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline bool
ports_match_v1(const struct xt_multiport_v1 *minfo,
u_int16_t src, u_int16_t dst)
{
unsigned int i;
u_int16_t s, e;
for (i = 0; i < minfo->count; i++) {
s = minfo->ports[i];
if (minfo->pflags[i]) {
/* range port matching */
e = minfo->ports[++i];
duprintf("src or dst matches with %d-%d?\n", s, e);
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src >= s && src <= e)
return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_DESTINATION
&& dst >= s && dst <= e)
return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_EITHER
&& ((dst >= s && dst <= e)
|| (src >= s && src <= e)))
return true ^ minfo->invert;
} else {
/* exact port matching */
duprintf("src or dst matches with %d?\n", s);
if (minfo->flags == XT_MULTIPORT_SOURCE
&& src == s)
return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_DESTINATION
&& dst == s)
return true ^ minfo->invert;
if (minfo->flags == XT_MULTIPORT_EITHER
&& (src == s || dst == s))
return true ^ minfo->invert;
}
}
return minfo->invert;
}
static bool
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct xt_match *match,
const void *matchinfo,
int offset,
unsigned int protoff,
bool *hotdrop)
{
__be16 _ports[2], *pptr;
const struct xt_multiport *multiinfo = matchinfo;
if (offset)
return false;
pptr = skb_header_pointer(skb, protoff, sizeof(_ports), _ports);
if (pptr == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
*hotdrop = true;
return false;
}
return ports_match(multiinfo->ports,
multiinfo->flags, multiinfo->count,
ntohs(pptr[0]), ntohs(pptr[1]));
}
static bool
match_v1(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct xt_match *match,
const void *matchinfo,
int offset,
unsigned int protoff,
bool *hotdrop)
{
__be16 _ports[2], *pptr;
const struct xt_multiport_v1 *multiinfo = matchinfo;
if (offset)
return false;
pptr = skb_header_pointer(skb, protoff, sizeof(_ports), _ports);
if (pptr == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
duprintf("xt_multiport: Dropping evil offset=0 tinygram.\n");
*hotdrop = true;
return false;
}
return ports_match_v1(multiinfo, ntohs(pptr[0]), ntohs(pptr[1]));
}
static inline bool
check(u_int16_t proto,
u_int8_t ip_invflags,
u_int8_t match_flags,
u_int8_t count)
{
/* Must specify supported protocol, no unknown flags or bad count */
return (proto == IPPROTO_TCP || proto == IPPROTO_UDP
|| proto == IPPROTO_UDPLITE
|| proto == IPPROTO_SCTP || proto == IPPROTO_DCCP)
&& !(ip_invflags & XT_INV_PROTO)
&& (match_flags == XT_MULTIPORT_SOURCE
|| match_flags == XT_MULTIPORT_DESTINATION
|| match_flags == XT_MULTIPORT_EITHER)
&& count <= XT_MULTI_PORTS;
}
/* Called when user tries to insert an entry of this type. */
static bool
checkentry(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int hook_mask)
{
const struct ipt_ip *ip = info;
const struct xt_multiport *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static bool
checkentry_v1(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int hook_mask)
{
const struct ipt_ip *ip = info;
const struct xt_multiport_v1 *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static bool
checkentry6(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int hook_mask)
{
const struct ip6t_ip6 *ip = info;
const struct xt_multiport *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static bool
checkentry6_v1(const char *tablename,
const void *info,
const struct xt_match *match,
void *matchinfo,
unsigned int hook_mask)
{
const struct ip6t_ip6 *ip = info;
const struct xt_multiport_v1 *multiinfo = matchinfo;
return check(ip->proto, ip->invflags, multiinfo->flags,
multiinfo->count);
}
static struct xt_match xt_multiport_match[] __read_mostly = {
{
.name = "multiport",
.family = AF_INET,
.revision = 0,
.checkentry = checkentry,
.match = match,
.matchsize = sizeof(struct xt_multiport),
.me = THIS_MODULE,
},
{
.name = "multiport",
.family = AF_INET,
.revision = 1,
.checkentry = checkentry_v1,
.match = match_v1,
.matchsize = sizeof(struct xt_multiport_v1),
.me = THIS_MODULE,
},
{
.name = "multiport",
.family = AF_INET6,
.revision = 0,
.checkentry = checkentry6,
.match = match,
.matchsize = sizeof(struct xt_multiport),
.me = THIS_MODULE,
},
{
.name = "multiport",
.family = AF_INET6,
.revision = 1,
.checkentry = checkentry6_v1,
.match = match_v1,
.matchsize = sizeof(struct xt_multiport_v1),
.me = THIS_MODULE,
},
};
static int __init xt_multiport_init(void)
{
return xt_register_matches(xt_multiport_match,
ARRAY_SIZE(xt_multiport_match));
}
static void __exit xt_multiport_fini(void)
{
xt_unregister_matches(xt_multiport_match,
ARRAY_SIZE(xt_multiport_match));
}
module_init(xt_multiport_init);
module_exit(xt_multiport_fini);
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