netdev - [PATCH net-next 3/6] net: add sysctl for enabling RFC 8335 PROBE messages

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Message-Id: <1de8170c1b7dec795f8ca257fbd56c61c36ad5a2.1607050389.git.andreas.a.roeseler@gmail.com>
Date:   Thu,  3 Dec 2020 19:16:49 -0800
From:   Andreas Roeseler <andreas.a.roeseler@...il.com>
To:     davem@...emloft.net, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        kuba@...nel.org
Cc:     netdev@...r.kernel.org
Subject: [PATCH net-next 3/6] net: add sysctl for enabling RFC 8335 PROBE messages

Section 8 of RFC 8335 specifies potential security concerns of
responding to PROBE requests, and states that nodes that support PROBE
functionality MUST be able to enable/disable responses and it is
disabled by default. 

Add sysctl to enable responses to PROBE messages. 

Signed-off-by: Andreas Roeseler <andreas.a.roeseler@...il.com>
---
 include/net/netns/ipv4.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 8e4fcac4df72..1d9b74228f3e 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -85,6 +85,7 @@ struct netns_ipv4 {
 #endif
 
 	int sysctl_icmp_echo_ignore_all;
+	int sysctl_icmp_echo_enable_probe;
 	int sysctl_icmp_echo_ignore_broadcasts;
 	int sysctl_icmp_ignore_bogus_error_responses;
 	int sysctl_icmp_ratelimit;
-- 
2.25.1