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Change: use interface HardwareAddr for dhcp discovery

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This commit is contained in:
Dreamacro 2021-10-14 22:54:43 +08:00
parent 13bd601cac
commit 583b2a5ace
1 changed files with 8 additions and 14 deletions
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22
component/dhcp/dhcp.go
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@ -3,9 +3,10 @@ package dhcp
import ( import (
"context" "context"
"errors" "errors"
"math/rand"
"net" "net"
"github.com/Dreamacro/clash/component/iface"
"github.com/insomniacslk/dhcp/dhcpv4" "github.com/insomniacslk/dhcp/dhcpv4"
) )
@ -23,7 +24,12 @@ func ResolveDNSFromDHCP(context context.Context, ifaceName string) ([]net.IP, er
result := make(chan []net.IP, 1) result := make(chan []net.IP, 1)
discovery, err := dhcpv4.NewDiscovery(randomHardware(), dhcpv4.WithBroadcast(true), dhcpv4.WithRequestedOptions(dhcpv4.OptionDomainNameServer)) ifaceObj, err := iface.ResolveInterface(ifaceName)
if err != nil {
return nil, err
}
discovery, err := dhcpv4.NewDiscovery(ifaceObj.HardwareAddr, dhcpv4.WithBroadcast(true), dhcpv4.WithRequestedOptions(dhcpv4.OptionDomainNameServer))
if err != nil { if err != nil {
return nil, err return nil, err
} }
@ -80,15 +86,3 @@ func receiveOffer(conn net.PacketConn, id dhcpv4.TransactionID, result chan<- []
return return
} }
} }
func randomHardware() net.HardwareAddr {
addr := make(net.HardwareAddr, 6)
addr[0] = 0xff
for i := 1; i < len(addr); i++ {
addr[i] = byte(rand.Intn(254) + 1)
}
return addr
}