neoneo-go/pkg/util/endpoint.go

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2018-01-29 18:17:49 +00:00
package util
import (
"fmt"
"strconv"
"strings"
)
// Endpoint host + port of a node, compatible with net.Addr.
type Endpoint struct {
IP [16]byte // TODO: make a uint128 type
Port uint16
}
// EndpointFromString returns an Endpoint from the given string.
// For now this only handles the most simple hostport form.
// e.g. 127.0.0.1:3000
// This should be enough to work with for now.
func EndpointFromString(s string) (Endpoint, error) {
hostPort := strings.Split(s, ":")
if len(hostPort) != 2 {
return Endpoint{}, fmt.Errorf("invalid address string: %s", s)
}
host := hostPort[0]
port := hostPort[1]
ch := strings.Split(host, ".")
buf := [16]byte{}
var n int
for i := 0; i < len(ch); i++ {
n = 12 + i
nn, _ := strconv.Atoi(ch[i])
buf[n] = byte(nn)
}
p, _ := strconv.Atoi(port)
return Endpoint{buf, uint16(p)}, nil
}
// Network implements the net.Addr interface.
func (e Endpoint) Network() string { return "tcp" }
// String implements the net.Addr interface.
func (e Endpoint) String() string {
b := make([]uint8, 4)
for i := 0; i < 4; i++ {
b[i] = byte(e.IP[len(e.IP)-4+i])
}
return fmt.Sprintf("%d.%d.%d.%d:%d", b[0], b[1], b[2], b[3], e.Port)
}