ipv4: Always call ip_options_build() after rest of IP header is filled in.

This will allow ip_options_build() to reliably look at the values of
iph->{daddr,saddr}

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 70778d4..98af369 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1327,10 +1327,6 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
        iph = (struct iphdr *)skb->data;
        iph->version = 4;
        iph->ihl = 5;
-       if (opt) {
-               iph->ihl += opt->optlen>>2;
-               ip_options_build(skb, opt, cork->addr, rt, 0);
-       }
        iph->tos = inet->tos;
        iph->frag_off = df;
        ip_select_ident(iph, &rt->dst, sk);
@@ -1339,6 +1335,11 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
        iph->saddr = fl4->saddr;
        iph->daddr = fl4->daddr;
 
+       if (opt) {
+               iph->ihl += opt->optlen>>2;
+               ip_options_build(skb, opt, cork->addr, rt, 0);
+       }
+
        skb->priority = sk->sk_priority;
        skb->mark = sk->sk_mark;
        /*