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dhcp6: only call net.InterfaceByName when client is constructed

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This commit is contained in:
Michael Stapelberg 2019-04-16 08:36:06 +02:00
parent 26075c4957
commit 1a65f972c6
1 changed files with 3 additions and 10 deletions
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13
internal/dhcp6/dhcp6.go
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@ -59,6 +59,7 @@ type Config struct {
type Client struct {
interfaceName string
hardwareAddr net.HardwareAddr
raddr *net.UDPAddr
timeNow func() time.Time
duid *dhcpv6.Duid
@ -118,11 +119,6 @@ func NewClient(cfg ClientConfig) (*Client, error) {
}
fmt.Printf("duid: %T, %v, %#v", duid, duid, duid)
} else {
iface, err := net.InterfaceByName(cfg.InterfaceName)
if err != nil {
return nil, err
}
duid = &dhcpv6.Duid{
Type: dhcpv6.DUID_LLT,
HwType: iana.HWTypeEthernet,
@ -143,6 +139,7 @@ func NewClient(cfg ClientConfig) (*Client, error) {
return &Client{
interfaceName: cfg.InterfaceName,
hardwareAddr: iface.HardwareAddr,
timeNow: time.Now,
raddr: raddr,
Conn: conn,
@ -217,11 +214,7 @@ func (c *Client) sendReceive(packet *dhcpv6.Message, expectedType dhcpv6.Message
func (c *Client) solicit(solicit *dhcpv6.Message) (*dhcpv6.Message, *dhcpv6.Message, error) {
var err error
if solicit == nil {
iface, err := net.InterfaceByName(c.interfaceName)
if err != nil {
return nil, nil, err
}
solicit, err = dhcpv6.NewSolicit(iface.HardwareAddr, dhcpv6.WithClientID(*c.duid))
solicit, err = dhcpv6.NewSolicit(c.hardwareAddr, dhcpv6.WithClientID(*c.duid))
if err != nil {
return nil, nil, err
}