On Sun, 2015-10-11 at 15:44 -0700, Eric Dumazet wrote:
> On Sun, 2015-10-11 at 15:43 -0700, Eric Dumazet wrote:
>
> > But your code reads 21th byte.
>
> BTW, nice catch !
Maybe the following one.
1) We properly set transport header
2) We use icmp_hdr() helper.
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 561cd4b8fc6e..ffe25cd1f0e0 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -406,11 +406,11 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4
*fl4,
ip_select_ident(net, skb, NULL);
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+ skb->transport_header += iphlen;
+ if (iph->protocol == IPPROTO_ICMP &&
+ length >= iphlen + sizeof(struct icmphdr))
+ icmp_out_count(net, icmp_hdr(skb)->type);
}
- if (iph->protocol == IPPROTO_ICMP)
- icmp_out_count(net, ((struct icmphdr *)
- skb_transport_header(skb))->type);
-
err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, sk, skb,
NULL, rt->dst.dev, dst_output_sk);
if (err > 0)
--
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