From 83837b20c887f559401a6947c9baa237d5787184 Mon Sep 17 00:00:00 2001
From: Bart De Schuymer <bdschuym@pandora.be>
Date: Tue, 3 Jun 2003 19:10:05 +0000
Subject: module versioning

---
 .../include/linux/netfilter_bridge/ebtables.h      | 22 +++++++++++++++++++---
 kernel/linux2.5/net/bridge/netfilter/ebt_802_3.c   |  7 ++++++-
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/kernel/linux2.5/include/linux/netfilter_bridge/ebtables.h b/kernel/linux2.5/include/linux/netfilter_bridge/ebtables.h
index 1056e45..04b064c 100644
--- a/kernel/linux2.5/include/linux/netfilter_bridge/ebtables.h
+++ b/kernel/linux2.5/include/linux/netfilter_bridge/ebtables.h
@@ -85,6 +85,7 @@ struct ebt_entry_match
 		char name[EBT_FUNCTION_MAXNAMELEN];
 		struct ebt_match *match;
 	} u;
+	unsigned int version;
 	/* size of data */
 	unsigned int match_size;
 	unsigned char data[0];
@@ -96,6 +97,7 @@ struct ebt_entry_watcher
 		char name[EBT_FUNCTION_MAXNAMELEN];
 		struct ebt_watcher *watcher;
 	} u;
+	unsigned int version;
 	/* size of data */
 	unsigned int watcher_size;
 	unsigned char data[0];
@@ -107,6 +109,7 @@ struct ebt_entry_target
 		char name[EBT_FUNCTION_MAXNAMELEN];
 		struct ebt_target *target;
 	} u;
+	unsigned int version;
 	/* size of data */
 	unsigned int target_size;
 	unsigned char data[0];
@@ -176,8 +179,15 @@ struct ebt_replace
 #define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO+1)
 #define EBT_SO_GET_MAX          (EBT_SO_GET_INIT_ENTRIES+1)
 
+#define NR_MINORS 8
+#define VERSIONIZE(major,minor) ((major << NR_MINORS) + minor)
+
 #ifdef __KERNEL__
 
+extern void ebt_print_string(const char *fmt, ...);
+#define PRINT_BUFFER_LENGTH 1024
+extern int ebt_check_version(unsigned int u,unsigned int k, const char *n);
+
 /* return values for match() functions */
 #define EBT_MATCH 0
 #define EBT_NOMATCH 1
@@ -186,13 +196,15 @@ struct ebt_match
 {
 	struct list_head list;
 	const char name[EBT_FUNCTION_MAXNAMELEN];
+	unsigned int version;
 	/* 0 == it matches */
 	int (*match)(const struct sk_buff *skb, const struct net_device *in,
 	   const struct net_device *out, const void *matchdata,
 	   unsigned int datalen);
 	/* 0 == let it in */
 	int (*check)(const char *tablename, unsigned int hookmask,
-	   const struct ebt_entry *e, void *matchdata, unsigned int datalen);
+	   const struct ebt_entry *e, void *matchdata, unsigned int datalen,
+	   unsigned int version);
 	void (*destroy)(void *matchdata, unsigned int datalen);
 	struct module *me;
 };
@@ -201,12 +213,14 @@ struct ebt_watcher
 {
 	struct list_head list;
 	const char name[EBT_FUNCTION_MAXNAMELEN];
+	unsigned int version;
 	void (*watcher)(const struct sk_buff *skb, const struct net_device *in,
 	   const struct net_device *out, const void *watcherdata,
 	   unsigned int datalen);
 	/* 0 == let it in */
 	int (*check)(const char *tablename, unsigned int hookmask,
-	   const struct ebt_entry *e, void *watcherdata, unsigned int datalen);
+	   const struct ebt_entry *e, void *watcherdata, unsigned int datalen,
+	   unsigned int version);
 	void (*destroy)(void *watcherdata, unsigned int datalen);
 	struct module *me;
 };
@@ -215,13 +229,15 @@ struct ebt_target
 {
 	struct list_head list;
 	const char name[EBT_FUNCTION_MAXNAMELEN];
+	unsigned int version;
 	/* returns one of the standard verdicts */
 	int (*target)(struct sk_buff **pskb, unsigned int hooknr,
 	   const struct net_device *in, const struct net_device *out,
 	   const void *targetdata, unsigned int datalen);
 	/* 0 == let it in */
 	int (*check)(const char *tablename, unsigned int hookmask,
-	   const struct ebt_entry *e, void *targetdata, unsigned int datalen);
+	   const struct ebt_entry *e, void *targetdata, unsigned int datalen,
+	   unsigned int version);
 	void (*destroy)(void *targetdata, unsigned int datalen);
 	struct module *me;
 };
diff --git a/kernel/linux2.5/net/bridge/netfilter/ebt_802_3.c b/kernel/linux2.5/net/bridge/netfilter/ebt_802_3.c
index 6eac757..c5eebea 100644
--- a/kernel/linux2.5/net/bridge/netfilter/ebt_802_3.c
+++ b/kernel/linux2.5/net/bridge/netfilter/ebt_802_3.c
@@ -36,13 +36,17 @@ static int ebt_filter_802_3(const struct sk_buff *skb, const struct net_device *
 	return EBT_MATCH;
 }
 
+static struct ebt_match filter_802_3;
 static int ebt_802_3_check(const char *tablename, unsigned int hookmask,
-   const struct ebt_entry *e, void *data, unsigned int datalen)
+   const struct ebt_entry *e, void *data, unsigned int datalen,
+   unsigned int version)
 {
 	struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
 
 	if (datalen < sizeof(struct ebt_802_3_info))
 		return -EINVAL;
+	if (ebt_check_version(version, filter_802_3.version, filter_802_3.name))
+		return -EINVAL;
 	if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK)
 		return -EINVAL;
 
@@ -55,6 +59,7 @@ static struct ebt_match filter_802_3 =
 	.match		= ebt_filter_802_3,
 	.check		= ebt_802_3_check,
 	.me		= THIS_MODULE,
+	.version	= VERSIONIZE(1,0),
 };
 
 static int __init init(void)
-- 
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