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oops. committed the wrong patch files for the multiport backport 

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3126 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Felix Fietkau 2006-02-04 14:40:09 +00:00
parent 3f4c5ffa23
commit 73890cebc9
1 changed files with 82 additions and 93 deletions
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175
target/linux/generic-2.4/patches/619-nefilter_multiport_backport.patch
View File

@ -1,23 +1,24 @@
diff -urN linux.old/include/linux/netfilter_ipv4/ipt_multiport.h linux.dev/include/linux/netfilter_ipv4/ipt_multiport.h
--- linux.old/include/linux/netfilter_ipv4/ipt_multiport.h 2000-12-11 22:31:30.000000000 +0100
+++ linux.dev/include/linux/netfilter_ipv4/ipt_multiport.h 2006-02-04 05:05:51.928476750 +0100
@@ -18,4 +18,13 @@
+++ linux.dev/include/linux/netfilter_ipv4/ipt_multiport.h 2006-02-04 05:23:54.318518250 +0100
@@ -11,11 +11,12 @@
#define IPT_MULTI_PORTS 15
-/* Must fit inside union ipt_matchinfo: 16 bytes */
-struct ipt_multiport
+struct ipt_multiport_v1
{
u_int8_t flags; /* Type of comparison */
u_int8_t count; /* Number of ports */
u_int16_t ports[IPT_MULTI_PORTS]; /* Ports */
};
+
+struct ipt_multiport_v1
+{
+ u_int8_t flags; /* Type of comparison */
+ u_int8_t count; /* Number of ports */
+ u_int16_t ports[IPT_MULTI_PORTS]; /* Ports */
+ u_int8_t pflags[IPT_MULTI_PORTS]; /* Port flags */
+ u_int8_t invert; /* Invert flag */
+};
};
#endif /*_IPT_MULTIPORT_H*/
diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfilter/ipt_multiport.c
--- linux.old/net/ipv4/netfilter/ipt_multiport.c 2003-06-13 16:51:39.000000000 +0200
+++ linux.dev/net/ipv4/netfilter/ipt_multiport.c 2006-02-04 05:05:03.701462750 +0100
+++ linux.dev/net/ipv4/netfilter/ipt_multiport.c 2006-02-04 05:34:27.362081000 +0100
@@ -1,5 +1,14 @@
/* Kernel module to match one of a list of TCP/UDP ports: ports are in
the same place so we can treat them as equal. */
@ -33,7 +34,7 @@ diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfil
#include <linux/module.h>
#include <linux/types.h>
#include <linux/udp.h>
@@ -8,6 +17,10 @@
@@ -8,97 +17,136 @@
#include <linux/netfilter_ipv4/ipt_multiport.h>
#include <linux/netfilter_ipv4/ip_tables.h>
@ -44,18 +45,45 @@ diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfil
#if 0
#define duprintf(format, args...) printk(format , ## args)
#else
@@ -33,34 +46,109 @@
return 0;
}
#define duprintf(format, args...)
#endif
+/* Returns 1 if the port is matched by the test, 0 otherwise. */
+static inline int
+/* from linux 2.6 skbuff.h */
+static inline void *skb_header_pointer(const struct sk_buff *skb, int offset,
+ int len, void *buffer)
+{
+ int hlen = skb_headlen(skb);
+
+ if (hlen - offset >= len)
+ return skb->data + offset;
+
+ if (skb_copy_bits(skb, offset, buffer, len) < 0)
+ return NULL;
+
+ return buffer;
+}
+
+
/* Returns 1 if the port is matched by the test, 0 otherwise. */
static inline int
-ports_match(const u_int16_t *portlist, enum ipt_multiport_flags flags,
- u_int8_t count, u_int16_t src, u_int16_t dst)
+ports_match_v1(const struct ipt_multiport_v1 *minfo,
+ u_int16_t src, u_int16_t dst)
+{
+ unsigned int i;
{
unsigned int i;
- for (i=0; i<count; i++) {
- if (flags != IPT_MULTIPORT_DESTINATION
- && portlist[i] == src)
- return 1;
-
- if (flags != IPT_MULTIPORT_SOURCE
- && portlist[i] == dst)
- return 1;
- }
+ u_int16_t s, e;
+
- return 0;
+ for (i=0; i < minfo->count; i++) {
+ s = minfo->ports[i];
+
@ -91,27 +119,34 @@ diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfil
+ }
+
+ return minfo->invert;
+}
+
}
static int
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const void *matchinfo,
int offset,
-match(const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const void *matchinfo,
- int offset,
- const void *hdr,
- u_int16_t datalen,
int *hotdrop)
- int *hotdrop)
+match_v1(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ int *hotdrop)
{
- const struct udphdr *udp = hdr;
- const struct ipt_multiport *multiinfo = matchinfo;
+ u16 _ports[2], *pptr;
const struct ipt_multiport *multiinfo = matchinfo;
+ const struct ipt_multiport_v1 *multiinfo = matchinfo;
+
+ if (offset)
+ return 0;
- /* Must be big enough to read ports. */
- if (offset == 0 && datalen < sizeof(struct udphdr)) {
+ if (offset)
+ return 0;
+
+ pptr = skb_header_pointer(skb, skb->nh.iph->ihl * 4,
+ sizeof(_ports), _ports);
+ if (pptr == NULL) {
@ -134,52 +169,27 @@ diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfil
- && ports_match(multiinfo->ports,
- multiinfo->flags, multiinfo->count,
- ntohs(udp->source), ntohs(udp->dest));
+ return ports_match(multiinfo->ports,
+ multiinfo->flags, multiinfo->count,
+ ntohs(pptr[0]), ntohs(pptr[1]));
+}
+
+static int
+match_v1(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ int *hotdrop)
+{
+ u16 _ports[2], *pptr;
+ const struct ipt_multiport_v1 *multiinfo = matchinfo;
+
+ if (offset)
+ return 0;
+
+ pptr = skb_header_pointer(skb, skb->nh.iph->ihl * 4,
+ 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("ipt_multiport:"
+ " Dropping evil offset=0 tinygram.\n");
+ *hotdrop = 1;
+ return 0;
+ }
+
+ return ports_match_v1(multiinfo, ntohs(pptr[0]), ntohs(pptr[1]));
}
/* Called when user tries to insert an entry of this type. */
@@ -71,34 +159,54 @@
unsigned int matchsize,
unsigned int hook_mask)
-/* Called when user tries to insert an entry of this type. */
static int
-checkentry(const char *tablename,
- const struct ipt_ip *ip,
- void *matchinfo,
- unsigned int matchsize,
- unsigned int hook_mask)
+checkentry_v1(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
{
- const struct ipt_multiport *multiinfo = matchinfo;
-
- if (matchsize != IPT_ALIGN(sizeof(struct ipt_multiport)))
- return 0;
+ return (matchsize == IPT_ALIGN(sizeof(struct ipt_multiport)));
+}
-
- /* Must specify proto == TCP/UDP, no unknown flags or bad count */
- return (ip->proto == IPPROTO_TCP || ip->proto == IPPROTO_UDP)
- && !(ip->invflags & IPT_INV_PROTO)
@ -188,29 +198,13 @@ diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfil
- || multiinfo->flags == IPT_MULTIPORT_DESTINATION
- || multiinfo->flags == IPT_MULTIPORT_EITHER)
- && multiinfo->count <= IPT_MULTI_PORTS;
+static int
+checkentry_v1(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ return (matchsize == IPT_ALIGN(sizeof(struct ipt_multiport_v1)));
}
-static struct ipt_match multiport_match
-= { { NULL, NULL }, "multiport", &match, &checkentry, NULL, THIS_MODULE };
+static struct ipt_match multiport_match = {
+ .name = "multiport",
+ .revision = 0,
+ .match = &match,
+ .checkentry = &checkentry,
+ .me = THIS_MODULE,
+};
+
+static struct ipt_match multiport_match_v1 = {
+ .name = "multiport",
+ .revision = 1,
+ .match = &match_v1,
+ .checkentry = &checkentry_v1,
+ .me = THIS_MODULE,
@ -221,19 +215,14 @@ diff -urN linux.old/net/ipv4/netfilter/ipt_multiport.c linux.dev/net/ipv4/netfil
- return ipt_register_match(&multiport_match);
+ int err;
+
+ err = ipt_register_match(&multiport_match);
+ if (!err) {
+ err = ipt_register_match(&multiport_match_v1);
+ if (err)
+ ipt_unregister_match(&multiport_match);
+ }
+ err = ipt_register_match(&multiport_match_v1);
+
+ return err;
}
static void __exit fini(void)
{
ipt_unregister_match(&multiport_match);
- ipt_unregister_match(&multiport_match);
+ ipt_unregister_match(&multiport_match_v1);
}