X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fipv4%2Fnetfilter%2Fipt_TTL.c;h=30eed65e7338c717003e2f17ad7e4c6a2f0ef737;hb=5c7c204aeca51ccfad63caab4fcdc5d8026c0fd8;hp=a991ec7bd4e7207e9c7a15c937ca60fac1fa6a51;hpb=fabb5c4e4a474ff0f7d6c1d3466a1b79bbce5f49;p=linux-2.6

diff --git a/net/ipv4/netfilter/ipt_TTL.c b/net/ipv4/netfilter/ipt_TTL.c
index a991ec7bd4..30eed65e73 100644
--- a/net/ipv4/netfilter/ipt_TTL.c
+++ b/net/ipv4/netfilter/ipt_TTL.c
@@ -16,23 +16,22 @@
 #include <linux/netfilter_ipv4/ipt_TTL.h>
 
 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
-MODULE_DESCRIPTION("IP tables TTL modification module");
+MODULE_DESCRIPTION("Xtables: IPv4 TTL field modification target");
 MODULE_LICENSE("GPL");
 
 static unsigned int
-ipt_ttl_target(struct sk_buff **pskb,
-	       const struct net_device *in, const struct net_device *out,
-	       unsigned int hooknum, const struct xt_target *target,
-	       const void *targinfo)
+ttl_tg(struct sk_buff *skb, const struct net_device *in,
+       const struct net_device *out, unsigned int hooknum,
+       const struct xt_target *target, const void *targinfo)
 {
 	struct iphdr *iph;
 	const struct ipt_TTL_info *info = targinfo;
 	int new_ttl;
 
-	if (!skb_make_writable(pskb, (*pskb)->len))
+	if (!skb_make_writable(skb, skb->len))
 		return NF_DROP;
 
-	iph = ip_hdr(*pskb);
+	iph = ip_hdr(skb);
 
 	switch (info->mode) {
 		case IPT_TTL_SET:
@@ -54,51 +53,50 @@ ipt_ttl_target(struct sk_buff **pskb,
 	}
 
 	if (new_ttl != iph->ttl) {
-		nf_csum_replace2(&iph->check, htons(iph->ttl << 8),
-					      htons(new_ttl << 8));
+		csum_replace2(&iph->check, htons(iph->ttl << 8),
+					   htons(new_ttl << 8));
 		iph->ttl = new_ttl;
 	}
 
 	return XT_CONTINUE;
 }
 
-static int ipt_ttl_checkentry(const char *tablename,
-		const void *e,
-		const struct xt_target *target,
-		void *targinfo,
-		unsigned int hook_mask)
+static bool
+ttl_tg_check(const char *tablename, const void *e,
+             const struct xt_target *target, void *targinfo,
+             unsigned int hook_mask)
 {
-	struct ipt_TTL_info *info = targinfo;
+	const struct ipt_TTL_info *info = targinfo;
 
 	if (info->mode > IPT_TTL_MAXMODE) {
 		printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
 			info->mode);
-		return 0;
+		return false;
 	}
-	if ((info->mode != IPT_TTL_SET) && (info->ttl == 0))
-		return 0;
-	return 1;
+	if (info->mode != IPT_TTL_SET && info->ttl == 0)
+		return false;
+	return true;
 }
 
-static struct xt_target ipt_TTL = {
+static struct xt_target ttl_tg_reg __read_mostly = {
 	.name 		= "TTL",
 	.family		= AF_INET,
-	.target 	= ipt_ttl_target,
+	.target 	= ttl_tg,
 	.targetsize	= sizeof(struct ipt_TTL_info),
 	.table		= "mangle",
-	.checkentry 	= ipt_ttl_checkentry,
+	.checkentry 	= ttl_tg_check,
 	.me 		= THIS_MODULE,
 };
 
-static int __init ipt_ttl_init(void)
+static int __init ttl_tg_init(void)
 {
-	return xt_register_target(&ipt_TTL);
+	return xt_register_target(&ttl_tg_reg);
 }
 
-static void __exit ipt_ttl_fini(void)
+static void __exit ttl_tg_exit(void)
 {
-	xt_unregister_target(&ipt_TTL);
+	xt_unregister_target(&ttl_tg_reg);
 }
 
-module_init(ipt_ttl_init);
-module_exit(ipt_ttl_fini);
+module_init(ttl_tg_init);
+module_exit(ttl_tg_exit);