| 1 | #!/usr/bin/python |
| 2 | # ldd - DNS implementation in Python |
| 3 | # Copyright (C) 2006 Fredrik Tolf <fredrik@dolda2000.com> |
| 4 | # |
| 5 | # This program is free software; you can redistribute it and/or modify |
| 6 | # it under the terms of the GNU General Public License as published by |
| 7 | # the Free Software Foundation; either version 2 of the License, or |
| 8 | # (at your option) any later version. |
| 9 | # |
| 10 | # This program is distributed in the hope that it will be useful, |
| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | # GNU General Public License for more details. |
| 14 | # |
| 15 | # You should have received a copy of the GNU General Public License |
| 16 | # along with this program; if not, write to the Free Software |
| 17 | # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | |
| 20 | import os |
| 21 | import sys |
| 22 | import getopt |
| 23 | import socket |
| 24 | import signal |
| 25 | import imp |
| 26 | import logging |
| 27 | |
| 28 | from ldd import server |
| 29 | |
| 30 | cfname = "/etc/lddd/conf" |
| 31 | port = 53 |
| 32 | daemonize = True |
| 33 | opts, args = getopt.getopt(sys.argv[1:], "ndc:p:") |
| 34 | for o, a in opts: |
| 35 | if o == "-d": |
| 36 | logging.basicConfig(level = logging.DEBUG) |
| 37 | daemonize = False |
| 38 | if o == "-c": |
| 39 | cfname = a |
| 40 | if o == "-n": |
| 41 | daemonize = False |
| 42 | if o == "-p": |
| 43 | port = int(a) |
| 44 | |
| 45 | logger = logging.getLogger("ldd.daemon") |
| 46 | |
| 47 | def diehandler(signum, frame): |
| 48 | global alive |
| 49 | alive = False |
| 50 | |
| 51 | for sig in [getattr(signal, "SIG" + s) for s in ["INT", "TERM"]]: |
| 52 | signal.signal(sig, diehandler) |
| 53 | |
| 54 | srv = server.dnsserver() |
| 55 | |
| 56 | cf = open(cfname, "r") |
| 57 | cmod = imp.load_module("servconf", cf, cfname, ("", "r", imp.PY_SOURCE)) |
| 58 | cf.close() |
| 59 | |
| 60 | cmod.setup(srv) |
| 61 | if(len(srv.sockets) < 1): |
| 62 | sk = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM) |
| 63 | sk.bind(("", port)) |
| 64 | srv.addsock(socket.AF_INET6, sk) |
| 65 | logger.info("config OK, starting server") |
| 66 | |
| 67 | alive = True |
| 68 | srv.start() |
| 69 | |
| 70 | if daemonize: |
| 71 | if(os.fork() != 0): |
| 72 | sys.exit(0) |
| 73 | os.chdir("/") |
| 74 | |
| 75 | while alive: |
| 76 | signal.pause() |
| 77 | logger.info("terminating") |
| 78 | srv.stop() |