icmp: ICMPV6: pass RFC 8335 reply messages to ping_rcv

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.roeseler@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 76990e1..8bd988f 100644 (file)
--- 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;
+       }
+
        /*
         *      18 is the highest 'known' ICMP type. Anything else is a mystery
         *

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 1bca2b0..e8398ff 100644 (file)
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -916,6 +916,10 @@ static int icmpv6_rcv(struct sk_buff *skb)
                success = ping_rcv(skb);
                break;
 
+       case ICMPV6_EXT_ECHO_REPLY:
+               success = ping_rcv(skb);
+               break;
+
        case ICMPV6_PKT_TOOBIG:
                /* BUGGG_FUTURE: if packet contains rthdr, we cannot update
                   standard destination cache. Seems, only "advanced"