From 22f728f8f311659b068e73ed92833c205651a47f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 13 May 2011 17:21:27 -0400 Subject: [PATCH] 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 --- net/ipv4/ip_output.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 70778d48aa7b..98af3697c718 100644 --- 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; /* -- 2.20.1