[NETFILTER]: add some consts, remove some casts

[firefly-linux-kernel-4.4.55.git] / net / ipv4 / netfilter / ipt_TTL.c

diff --git a/net/ipv4/netfilter/ipt_TTL.c b/net/ipv4/netfilter/ipt_TTL.c
index 64be31c22ba9eb4aac423865fc640e835cca86fb..f53f2c4ca4a1c0f15f0bf3688220b72af1872d59 100644 (file)
--- a/net/ipv4/netfilter/ipt_TTL.c
+++ b/net/ipv4/netfilter/ipt_TTL.c
@@ -32,7 +32,7 @@ ipt_ttl_target(struct sk_buff **pskb,
        if (!skb_make_writable(pskb, (*pskb)->len))
                return NF_DROP;
 
-       iph = (*pskb)->nh.iph;
+       iph = ip_hdr(*pskb);
 
        switch (info->mode) {
                case IPT_TTL_SET:
@@ -62,22 +62,22 @@ ipt_ttl_target(struct sk_buff **pskb,
        return XT_CONTINUE;
 }
 
-static int ipt_ttl_checkentry(const char *tablename,
+static bool ipt_ttl_checkentry(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;
+               return false;
+       return true;
 }
 
 static struct xt_target ipt_TTL = {