Allow load config from file

setup.py

@@ -15,7 +15,6 @@
     url='https://github.com/sorz/sstp-server',
     packages=['sstpd'],
     ext_modules = [fcsmodule],
-    data_files=[('', ['README.rst'])],
     entry_points="""
     [console_scripts]
     sstpd = sstpd:main

sstp-server.ini

@@ -0,0 +1,38 @@
+[DEAFULT]
+# 1 to 50. Default 20, debug 10, verbose 5
+;log_level = 20
+
+# OpenSSL cipher suite. See ciphers(1).
+;cipher = EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH
+
+# Path to pppd
+;pppd = /usr/bin/pppd
+
+[site1]
+# To start with [site1] config, execute:
+#   sstpd -f /path/to/config.ini -s site1
+# Config here will override items on [DEFAULT],
+# and cmdline args override the config file.
+
+listen = 0.0.0.0
+port = 443
+
+# PEM-format certificate with key.
+pem_cert = /path/to/cert.pem
+
+# Address of server side on ppp.
+local = 192.168.20.1
+
+# If RADIUS is used to mangle IP pool, comment it out.
+remote = 192.168.20.0/24
+
+# pppd config file path
+;pppd_config = /etc/ppp/options.sstpd
+
+[no-ssl]
+# Use plain HTTP instead of HTTPS. Useful when running behind proxy.
+no_ssl = yes
+
+listen = 127.0.0.1
+port = 4433
+

sstpd/__main__.py

@@ -2,6 +2,7 @@
 import sys
 import logging
 import argparse
+from ConfigParser import SafeConfigParser, NoSectionError
 from twisted.internet.endpoints import SSL4ServerEndpoint
 from twisted.internet import reactor, ssl
 
@@ -10,9 +11,31 @@
 
 
 def _getArgs():
-    parser = argparse.ArgumentParser(description='A Secure Socket Tunneling '
-            'Protocol (SSTP) server.',
-            epilog='Author: Sorz <[email protected]>.')
+    conf_parser = argparse.ArgumentParser(
+            description='A Secure Socket Tunneling Protocol (SSTP) server.',
+            epilog='Author: Sorz <[email protected]>.',
+            add_help=False)
+    conf_parser.add_argument("-f", "--conf-file",
+            help="Specify config file.", metavar="FILE")
+    conf_parser.add_argument("-s", "--conf-section",
+            help="Specify section name on config file.",
+            metavar="SITE", default="DEFAULT")
+
+    args, remaining_argv = conf_parser.parse_known_args()
+    defaults = {}
+    if args.conf_file:
+        config = SafeConfigParser()
+        config.read(args.conf_file)
+        try:
+            defaults = dict(config.items(args.conf_section))
+        except NoSectionError as e:
+            print('Error: section [%s] not found in config file.' % \
+                  args.conf_section)
+            sys.exit(1)
+            return
+
+    parser = argparse.ArgumentParser(parents=[conf_parser])
+    parser.set_defaults(**defaults)
     parser.add_argument('-l', '--listen',
             default='',
             metavar='ADDRESS',