Support NAT/port forwards.

[nodemanager.git] / net.py

diff --git a/net.py b/net.py
index f333e83..b0874a6 100644 (file)
--- a/net.py
+++ b/net.py
@@ -6,10 +6,12 @@ import sioc
 import bwlimit
 import logger
 import string
+import iptables
 
 def GetSlivers(plc, data):
     InitNodeLimit(data)
     InitI2(plc, data)
+    InitNAT(plc, data)
 
 def InitNodeLimit(data):
     # query running network interfaces
@@ -61,5 +63,51 @@ def InitI2(plc, data):
             i2nodes.append(node['ip'])
         bwlimit.exempt_init('Internet2', i2nodes)
 
+def InitNAT(plc, data):
+    # query running network interfaces
+    devs = sioc.gifconf()
+    ips = dict(zip(devs.values(), devs.keys()))
+    macs = {}
+    for dev in devs:
+        macs[sioc.gifhwaddr(dev).lower()] = dev
+
+    ipt = iptables.IPTables()
+    for network in data['networks']:
+        # Get interface name preferably from MAC address, falling
+        # back on IP address.
+        if macs.has_key(network['mac']):
+            dev = macs[network['mac'].lower()]
+        elif ips.has_key(network['ip']):
+            dev = ips[network['ip']]
+        else:
+            logger.log('%s: no such interface with address %s/%s' % (network['hostname'], network['ip'], network['mac']))
+            continue
+
+        try:
+            settings = plc.GetNodeNetworkSettings({'nodenetwork_setting_id': network['nodenetwork_setting_ids']})
+        except:
+            continue
+        # XXX arbitrary names
+        for setting in settings:
+            if setting['category'] != 'firewall':
+                continue
+            if setting['name'] == 'external':
+                # Enable NAT for this interface
+                ipt.add_ext(dev)
+            elif setting['name'] == 'internal':
+                ipt.add_int(dev)
+            elif setting['name'] == 'pf': # XXX Uglier code is hard to find...
+                for pf in setting['value'].split("\n"):
+                    fields = {}
+                    for field in pf.split(","):
+                        (key, val) = field.split("=", 2)
+                        fields[key] = val
+                    if 'new_dport' not in fields:
+                        fields['new_dport'] = fields['dport']
+                    if 'source' not in fields:
+                        fields['source'] = "0.0.0.0/0"
+                    ipt.add_pf(fields)
+    ipt.commit()
+
 def start(options, config):
     pass