The initial script to announce domains to avahi.

puppet/modules/avahi-publish-vhosts/files/avahi-alias.py

@@ -0,0 +1,53 @@
+#! /usr/bin/env python
+# avahi-alias.py
+
+import avahi, dbus
+from encodings.idna import ToASCII
+
+# Got these from /usr/include/avahi-common/defs.h
+CLASS_IN = 0x01
+TYPE_CNAME = 0x05
+
+TTL = 60
+
+def publish_cname(cname):
+    bus = dbus.SystemBus()
+    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER),
+            avahi.DBUS_INTERFACE_SERVER)
+    group = dbus.Interface(bus.get_object(avahi.DBUS_NAME, server.EntryGroupNew()),
+            avahi.DBUS_INTERFACE_ENTRY_GROUP)
+
+    rdata = createRR(server.GetHostNameFqdn())
+    cname = encode_dns(cname)
+
+    group.AddRecord(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, dbus.UInt32(0),
+        cname, CLASS_IN, TYPE_CNAME, TTL, rdata)
+    group.Commit()
+
+
+def encode_dns(name):
+    out = []
+    for part in name.split('.'):
+        if len(part) == 0: continue
+        out.append(ToASCII(part))
+    return '.'.join(out)
+
+def createRR(name):
+    out = []
+    for part in name.split('.'):
+        if len(part) == 0: continue
+        out.append(chr(len(part)))
+        out.append(ToASCII(part))
+    out.append('\0')
+    return ''.join(out)
+
+if __name__ == '__main__':
+    import time, sys, locale
+    for each in sys.argv[1:]:
+        name = unicode(each, locale.getpreferredencoding())
+        publish_cname(name)
+    try:
+        # Just loop forever
+        while 1: time.sleep(60)
+    except KeyboardInterrupt:
+        print "Exiting"