From 617bbe3725ebc29e493414f62a07eb6ac102eb3d Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Sun, 30 Mar 2014 16:44:46 +0200
Subject: [PATCH] xt_layer7: Remove all preprocessor if/else constructs for
 older kernels.

---
 net/netfilter/xt_layer7.c | 68 ++++-----------------------------------
 1 file changed, 7 insertions(+), 61 deletions(-)

diff --git a/net/netfilter/xt_layer7.c b/net/netfilter/xt_layer7.c
index 42b46de45b1f..da61d485f086 100644
--- a/net/netfilter/xt_layer7.c
+++ b/net/netfilter/xt_layer7.c
@@ -25,10 +25,8 @@
 #include <linux/netfilter.h>
 #include <net/netfilter/nf_conntrack.h>
 #include <net/netfilter/nf_conntrack_core.h>
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
 #include <net/netfilter/nf_conntrack_extend.h>
 #include <net/netfilter/nf_conntrack_acct.h>
-#endif
 #include <linux/netfilter/x_tables.h>
 #include <linux/netfilter/xt_layer7.h>
 #include <linux/ctype.h>
@@ -65,10 +63,6 @@ DEFINE_SPINLOCK(l7_lock);
 
 static int total_acct_packets(struct nf_conn *ct)
 {
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 26)
-	BUG_ON(ct == NULL);
-	return (ct->counters[IP_CT_DIR_ORIGINAL].packets + ct->counters[IP_CT_DIR_REPLY].packets);
-#else
 	struct nf_conn_counter *acct;
 
 	BUG_ON(ct == NULL);
@@ -76,7 +70,6 @@ static int total_acct_packets(struct nf_conn *ct)
 	if (!acct)
 		return 0;
 	return (atomic64_read(&acct[IP_CT_DIR_ORIGINAL].packets) + atomic64_read(&acct[IP_CT_DIR_REPLY].packets));
-#endif
 }
 
 #ifdef CONFIG_IP_NF_MATCH_LAYER7_DEBUG
@@ -414,31 +407,12 @@ static int layer7_write_proc(struct file* file, const char* buffer,
 	return count;
 }
 
-static bool
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)
-match(const struct sk_buff *skbin, struct xt_action_param *par)
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-match(const struct sk_buff *skbin, const struct xt_match_param *par)
-#else
-match(const struct sk_buff *skbin,
-      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)
-#endif
+static bool match(const struct sk_buff *skbin, struct xt_action_param *par)
 {
 	/* sidestep const without getting a compiler warning... */
 	struct sk_buff * skb = (struct sk_buff *)skbin; 
 
-	const struct xt_layer7_info * info = 
-	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-		par->matchinfo;
-	#else
-		matchinfo;
-	#endif
+	const struct xt_layer7_info * info = par->matchinfo;
 
 	enum ip_conntrack_info master_ctinfo, ctinfo;
 	struct nf_conn *master_conntrack, *conntrack;
@@ -599,49 +573,21 @@ match(const struct sk_buff *skbin,
 }
 
 // load nf_conntrack_ipv4
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)
-static int
-#else
-static bool
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-check(const struct xt_mtchk_param *par)
+static int check(const struct xt_mtchk_param *par)
 {
         if (nf_ct_l3proto_try_module_get(par->match->family) < 0) {
                 printk(KERN_WARNING "can't load conntrack support for "
                                     "proto=%d\n", par->match->family);
-#else
-check(const char *tablename, const void *inf,
-		 const struct xt_match *match, void *matchinfo,
-		 unsigned int hook_mask)
-{
-        if (nf_ct_l3proto_try_module_get(match->family) < 0) {
-                printk(KERN_WARNING "can't load conntrack support for "
-                                    "proto=%d\n", match->family);
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)
 		return -EINVAL;
 	}
 	return 0;
-#else
-                return 0;
-        }
-	return 1;
-#endif
 }
 
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
-	static void destroy(const struct xt_mtdtor_param *par)
-	{
-		nf_ct_l3proto_module_put(par->match->family);
-	}
-#else
-	static void destroy(const struct xt_match *match, void *matchinfo)
-	{
-		nf_ct_l3proto_module_put(match->family);
-	}
-#endif
+static void destroy(const struct xt_mtdtor_param *par)
+{
+	nf_ct_l3proto_module_put(par->match->family);
+}
 
 static struct xt_match xt_layer7_match[] __read_mostly = {
 {
-- 
2.47.3