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| author | Eric Dumazet <edumazet@google.com> | 2020-05-28 03:34:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-28 21:02:46 +0300 |
| commit | d29245692a44d71d5e2e0770463184a693696232 (patch) | |
| tree | efe215dec4d12a186e173b33011b3af319c3fb66 /net/ipv6/tcp_ipv6.c | |
| parent | 4d7525085a9ba86b9d78561d379b2ff8c0b30468 (diff) | |
| download | linux-d29245692a44d71d5e2e0770463184a693696232.tar.xz | |
tcp: ipv6: support RFC 6069 (TCP-LD)
Make tcp_ld_RTO_revert() helper available to IPv6, and
implement RFC 6069 :
Quoting this RFC :
3. Connectivity Disruption Indication
For Internet Protocol version 6 (IPv6) [RFC2460], the counterpart of
the ICMP destination unreachable message of code 0 (net unreachable)
and of code 1 (host unreachable) is the ICMPv6 destination
unreachable message of code 0 (no route to destination) [RFC4443].
As with IPv4, a router should generate an ICMPv6 destination
unreachable message of code 0 in response to a packet that cannot be
delivered to its destination address because it lacks a matching
entry in its routing table.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 01a6f5111a77..b7415ca75c2d 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -473,6 +473,15 @@ static int tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, } else sk->sk_err_soft = err; goto out; + case TCP_LISTEN: + break; + default: + /* check if this ICMP message allows revert of backoff. + * (see RFC 6069) + */ + if (!fastopen && type == ICMPV6_DEST_UNREACH && + code == ICMPV6_NOROUTE) + tcp_ld_RTO_revert(sk, seq); } if (!sock_owned_by_user(sk) && np->recverr) { |