net-timestamp: no-payload option

[cascardo/linux.git] / net / ipv4 / ip_sockglue.c

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index a317797..31d8c71 100644 (file)
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -483,7 +483,7 @@ int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
 
        serr = SKB_EXT_ERR(skb);
 
-       if (sin) {
+       if (sin && skb->len) {
                sin->sin_family = AF_INET;
                sin->sin_addr.s_addr = *(__be32 *)(skb_network_header(skb) +
                                                   serr->addr_offset);
@@ -494,17 +494,14 @@ int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
 
        memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
        sin = &errhdr.offender;
-       sin->sin_family = AF_UNSPEC;
-
-       if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP ||
-           ipv4_pktinfo_prepare_errqueue(sk, skb, serr->ee.ee_origin)) {
-               struct inet_sock *inet = inet_sk(sk);
+       memset(sin, 0, sizeof(*sin));
 
+       if (skb->len &&
+           (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP ||
+            ipv4_pktinfo_prepare_errqueue(sk, skb, serr->ee.ee_origin))) {
                sin->sin_family = AF_INET;
                sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
-               sin->sin_port = 0;
-               memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
-               if (inet->cmsg_flags)
+               if (inet_sk(sk)->cmsg_flags)
                        ip_cmsg_recv(msg, skb);
        }