[NET]: Make mangling a checksum (0 -> 0xffff on the wire) explicit.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 7 insertions, 7 deletions

diff --git a/net/ipv4/ipvs/ip_vs_proto_udp.c b/net/ipv4/ipvs/ip_vs_proto_udp.c
index 261581e6a814..3647397e416d 100644
--- a/net/ipv4/ipvs/ip_vs_proto_udp.c
+++ b/net/ipv4/ipvs/ip_vs_proto_udp.c
@@ -125,7 +125,7 @@ udp_fast_csum_update(struct udphdr *uhdr, __be32 oldip, __be32 newip,
                                  ip_vs_check_diff(oldport ^ htons(0xFFFF),
                                                   newport, uhdr->check));
         if (!uhdr->check)
-                uhdr->check = -1;
+                uhdr->check = CSUM_MANGLED_0;
 }
 
 static int
@@ -173,7 +173,7 @@ udp_snat_handler(struct sk_buff **pskb,
                                                 cp->protocol,
                                                 (*pskb)->csum);
                 if (udph->check == 0)
-                        udph->check = -1;
+                        udph->check = CSUM_MANGLED_0;
                 IP_VS_DBG(11, "O-pkt: %s O-csum=%d (+%zd)\n",
                           pp->name, udph->check,
                           (char*)&(udph->check) - (char*)udph);
@@ -228,7 +228,7 @@ udp_dnat_handler(struct sk_buff **pskb,
                                                 cp->protocol,
                                                 (*pskb)->csum);
                 if (udph->check == 0)
-                        udph->check = -1;
+                        udph->check = CSUM_MANGLED_0;
                 (*pskb)->ip_summed = CHECKSUM_UNNECESSARY;
         }
         return 1;
diff --git a/net/ipv4/netfilter/ip_nat_helper.c b/net/ipv4/netfilter/ip_nat_helper.c
index 3bf858480558..3e7fd64c2162 100644
--- a/net/ipv4/netfilter/ip_nat_helper.c
+++ b/net/ipv4/netfilter/ip_nat_helper.c
@@ -264,7 +264,7 @@ ip_nat_mangle_udp_packet(struct sk_buff **pskb,
                                                 csum_partial((char *)udph,
                                                              datalen, 0));
                 if (!udph->check)
-                        udph->check = -1;
+                        udph->check = CSUM_MANGLED_0;
         } else
                 udph->check = nf_proto_csum_update(*pskb,
                                                    htons(oldlen) ^ htons(0xFFFF),
diff --git a/net/ipv4/netfilter/ip_nat_proto_udp.c b/net/ipv4/netfilter/ip_nat_proto_udp.c
index 4bbec7730d18..82f8a6ab07ec 100644
--- a/net/ipv4/netfilter/ip_nat_proto_udp.c
+++ b/net/ipv4/netfilter/ip_nat_proto_udp.c
@@ -121,7 +121,7 @@ udp_manip_pkt(struct sk_buff **pskb,
                                                   *portptr ^ htons(0xFFFF), newport,
                                                   hdr->check, 0);
                 if (!hdr->check)
-                        hdr->check = -1;
+                        hdr->check = CSUM_MANGLED_0;
         }
         *portptr = newport;
         return 1;
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index f9c4ed7207bb..dc19ba1e73b5 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -441,7 +441,7 @@ static void udp4_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb,
 
                 uh->check = csum_tcpudp_magic(src, dst, len, IPPROTO_UDP, csum);
                 if (uh->check == 0)
-                        uh->check = -1;
+                        uh->check = CSUM_MANGLED_0;
         }
 }
 
@@ -490,7 +490,7 @@ int udp_push_pending_frames(struct sock *sk, struct udp_sock *up)
         uh->check = csum_tcpudp_magic(fl->fl4_src, fl->fl4_dst, up->len,
                                       sk->sk_protocol, csum             );
         if (uh->check == 0)
-                uh->check = -1;
+                uh->check = CSUM_MANGLED_0;
 
 send:
         err = ip_push_pending_frames(sk);