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authorEric Dumazet <edumazet@google.com>2019-07-01 06:39:36 -0700
committerDavid S. Miller <davem@davemloft.net>2019-07-01 10:54:51 -0700
commita346abe051bd2bd0d5d0140b2da9ec95639acad7 (patch)
tree1e03874ac049b3d298d382e678a84b68f7ce5f12 /net/ipv6/icmp.c
parent954a5a029472568845a25cd1c59e02e09db3316c (diff)
downloadlinux-a346abe051bd2bd0d5d0140b2da9ec95639acad7.tar.bz2
ipv6: icmp: allow flowlabel reflection in echo replies
Extend flowlabel_reflect bitmask to allow conditional reflection of incoming flowlabels in echo replies. Note this has precedence against auto flowlabels. Add flowlabel_reflect enum to replace hard coded values. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/icmp.c')
-rw-r--r--net/ipv6/icmp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 12906301ec7b..62c997201970 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -703,6 +703,9 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
tmp_hdr.icmp6_type = ICMPV6_ECHO_REPLY;
memset(&fl6, 0, sizeof(fl6));
+ if (net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ICMPV6_ECHO_REPLIES)
+ fl6.flowlabel = ip6_flowlabel(ipv6_hdr(skb));
+
fl6.flowi6_proto = IPPROTO_ICMPV6;
fl6.daddr = ipv6_hdr(skb)->saddr;
if (saddr)