Imports github.com/elastic/beats/libbeat/common golang.org/x/net/ipv6 golang.org/x/net/icmp github.com/elastic/beats/heartbeat/monitors golang.org/x/net/ipv4 github.com/elastic/beats/libbeat/logp github.com/elastic/beats/heartbeat/look Standard library imports bytes encoding/binary errors fmt math/rand net sync time