ip: make IP identifiers less predictable

[cascardo/linux.git] / include / net / ip.h

diff --git a/include/net/ip.h b/include/net/ip.h
index 0e795df..7596eb2 100644 (file)
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -309,16 +309,7 @@ static inline unsigned int ip_skb_dst_mtu(const struct sk_buff *skb)
        }
 }
 
-#define IP_IDENTS_SZ 2048u
-extern atomic_t *ip_idents;
-
-static inline u32 ip_idents_reserve(u32 hash, int segs)
-{
-       atomic_t *id_ptr = ip_idents + hash % IP_IDENTS_SZ;
-
-       return atomic_add_return(segs, id_ptr) - segs;
-}
-
+u32 ip_idents_reserve(u32 hash, int segs);
 void __ip_select_ident(struct iphdr *iph, int segs);
 
 static inline void ip_select_ident_segs(struct sk_buff *skb, struct sock *sk, int segs)