begin macvlan

.gitignore

@@ -1,3 +1,5 @@
+*.swp
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

dhcp_client.py

@@ -28,7 +28,7 @@ class DhcpClient:
 
 
   def get_offer(self, mac, iface, timeout = 10):
-    pc = pcap.pcap(name=iface)
+    pc = pcap.pcap(name=iface, promisc=True)
     pc.setfilter('udp and udp src port 67 and udp dst port 68')
     xid = [random.randrange(255), random.randrange(255),
         random.randrange(255), random.randrange(255)]

test.py

@@ -3,7 +3,7 @@
 import dhcp_client
 
 dh = dhcp_client.DhcpClient()
-offer = dh.get_offer('00:15:00:ba:60:da', 'eth0')
+offer = dh.get_offer('6c:3b:e5:1f:96:46', 'vmac')
 #offer = dh.get_offer('08:00:27:45:60:dc', 'wlan0')
 if offer == None:
     print("Timeout")

vmac.py

@@ -0,0 +1,34 @@
+#! /usr/bin/env python
+import subprocess
+import dhcp_client
+
+def create_viface(iface, viface, mac):
+    if subprocess.call(['ip', 'link', 'add', 'link', iface, viface,
+        'address', mac, 'type', 'macvlan']) != 0:
+        return False
+    if subprocess.call(['ip', 'link', 'dev', 'set', viface, 'up']) != 0:
+        return False
+    return True
+
+def remove_viface(viface):
+    return subprocess.call(['ip', 'link', 'del', viface]) == 0
+
+iface = 'em1'
+viface = 'vmac'
+mac = '6c:3b:e5:1f:96:46'
+
+if not create_viface(iface, viface, mac):
+    print('Failed to create virtual interface')
+    quit(1)
+
+dh = dhcp_client.DhcpClient()
+offer = dh.get_offer(mac, viface)
+
+if offer == None:
+    print('DHCP client timeout')
+else:
+    print(offer.str())
+
+if not remove_viface(viface):
+    printf('Failed to remove virtual interface')
+    quit(4)