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* passt: Introduce ICMP echo proxyStefano Brivio2021-03-181-0/+136
It's nice to be able to confirm connectivity using ICMP or ICMPv6 echo requests, and "ping" sockets on Linux (IPPROTO_ICMP datagram) allow us to do that without any special capability. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>