linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / net / ipv4 / netfilter / ipt_TTL.c

diff --git a/net/ipv4/netfilter/ipt_TTL.c b/net/ipv4/netfilter/ipt_TTL.c
index f48892a..b769eb2 100644 (file)
--- a/net/ipv4/netfilter/ipt_TTL.c
+++ b/net/ipv4/netfilter/ipt_TTL.c
@@ -20,10 +20,9 @@ MODULE_DESCRIPTION("IP tables TTL modification module");
 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, void *userinfo)
+ipt_ttl_target(struct sk_buff **pskb, const struct net_device *in, 
+               const struct net_device *out, unsigned int hooknum, 
+               const void *targinfo, void *userinfo)
 {
        struct iphdr *iph;
        const struct ipt_TTL_info *info = targinfo;
@@ -68,41 +67,53 @@ ipt_ttl_target(struct sk_buff **pskb,
 
 static int ipt_ttl_checkentry(const char *tablename,
                const void *e,
-               const struct xt_target *target,
                void *targinfo,
                unsigned int targinfosize,
                unsigned int hook_mask)
 {
        struct ipt_TTL_info *info = targinfo;
 
+       if (targinfosize != IPT_ALIGN(sizeof(struct ipt_TTL_info))) {
+               printk(KERN_WARNING "ipt_TTL: targinfosize %u != %Zu\n",
+                               targinfosize,
+                               IPT_ALIGN(sizeof(struct ipt_TTL_info)));
+               return 0;
+       }
+
+       if (strcmp(tablename, "mangle")) {
+               printk(KERN_WARNING "ipt_TTL: can only be called from "
+                       "\"mangle\" table, not \"%s\"\n", tablename);
+               return 0;
+       }
+
        if (info->mode > IPT_TTL_MAXMODE) {
                printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n", 
                        info->mode);
                return 0;
        }
+
        if ((info->mode != IPT_TTL_SET) && (info->ttl == 0))
                return 0;
+
        return 1;
 }
 
 static struct ipt_target ipt_TTL = { 
        .name           = "TTL",
        .target         = ipt_ttl_target, 
-       .targetsize     = sizeof(struct ipt_TTL_info),
-       .table          = "mangle",
        .checkentry     = ipt_ttl_checkentry, 
        .me             = THIS_MODULE,
 };
 
-static int __init ipt_ttl_init(void)
+static int __init init(void)
 {
        return ipt_register_target(&ipt_TTL);
 }
 
-static void __exit ipt_ttl_fini(void)
+static void __exit fini(void)
 {
        ipt_unregister_target(&ipt_TTL);
 }
 
-module_init(ipt_ttl_init);
-module_exit(ipt_ttl_fini);
+module_init(init);
+module_exit(fini);