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avahi publish
#! /usr/bin/env python
# avahi-alias.py
import avahi, dbus
from encodings.idna import ToASCII
import logging
# Got these from /usr/include/avahi-common/defs.h
CLASS_IN = 0x01
TYPE_CNAME = 0x05
TYPE_A = 0x01
TTL = 60
def publish_a_record(cname):
logging.info('publish %s', 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)
# 123 if (avahi_entry_group_add_address(entry_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, config->no_reverse ? AVAHI_PUBLISH_NO_REVERSE : 0, config->name, &config->address) < 0) {
# socket.inet_aton('127.0.0.1')
group.AddRecord(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, dbus.UInt32(0),
cname, CLASS_IN, TYPE_A, TTL, '\x7f\x00\x00\x01')
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 = ['127.0.0.1']
out.append('\0')
return ''.join(out)
if __name__ == '__main__':
logging.basicConfig(level=20)
import time, sys, locale
for each in sys.argv[1:]:
name = unicode(each, locale.getpreferredencoding())
if not name.endswith('.local'):
name = name + '.local'
publish_a_record(name)
try:
# Just loop forever
while 1: time.sleep(60)
except KeyboardInterrupt:
print "Exiting"
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