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Update urlv4.go

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Add "net.LookupIP()" function to support hostname when we add enode by hostname:port
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dipingxian2 2019-01-26 16:53:05 +08:00 committed by GitHub
parent 2209fede4e
commit 9040b4c284
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1 changed files with 7 additions and 1 deletions
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6
p2p/enode/urlv4.go
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@ -124,8 +124,14 @@ func parseComplete(rawurl string) (*Node, error) {
return nil, fmt.Errorf("invalid host: %v", err) return nil, fmt.Errorf("invalid host: %v", err)
} }
if ip = net.ParseIP(host); ip == nil { if ip = net.ParseIP(host); ip == nil {
// attempt to look up IP addresses if host is a FQDN
lookupIPs, err := net.LookupIP(host)
if err != nil {
return nil, errors.New("invalid IP address") return nil, errors.New("invalid IP address")
} }
// set to first ip by default
ip = lookupIPs[0]
}
// Ensure the IP is 4 bytes long for IPv4 addresses. // Ensure the IP is 4 bytes long for IPv4 addresses.
if ipv4 := ip.To4(); ipv4 != nil { if ipv4 := ip.To4(); ipv4 != nil {
ip = ipv4 ip = ipv4