On Mon, Apr 12, 2021 at 3:09 PM Andreas Roeseler
<andreas.a.roese...@gmail.com> wrote:
>
> The current icmp_rcv function drops all unknown ICMP types, including
> ICMP_EXT_ECHOREPLY (type 43). In order to parse Extended Echo Reply messages,
> we have
> to pass these packets to the ping_rcv function, which does not do any
> other filtering and passes the packet to the designated socket.
>
> Pass incoming RFC 8335 ICMP Extended Echo Reply packets to the ping_rcv
> handler instead of discarding the packet.
>
> Signed-off-by: Andreas Roeseler <andreas.a.roese...@gmail.com>
> ---
> net/ipv4/icmp.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
> index 76990e13a2f9..8bd988fbcb31 100644
> --- a/net/ipv4/icmp.c
> +++ b/net/ipv4/icmp.c
> @@ -1196,6 +1196,11 @@ int icmp_rcv(struct sk_buff *skb)
> goto success_check;
> }
>
> + if (icmph->type == ICMP_EXT_ECHOREPLY) {
> + success = ping_rcv(skb);
> + goto success_check;
> + }
> +
Do you need the same for ICMPV6_EXT_ECHO_REPLY ?
