build default invocation command + options

if not found in config file.
fix #182 and #356

1 files changed, 126 insertions, 18 deletions

diff --git a/src/leap/eip/config.py b/src/leap/eip/config.py
index d8ffeb28..3fca329c 100644
--- a/src/leap/eip/config.py
+++ b/src/leap/eip/config.py
@@ -1,17 +1,132 @@
 import ConfigParser
+import grp
 import os
+import platform
 
 from leap.util.fileutil import which, mkdir_p
 
 
+def build_ovpn_options():
+    """
+    build a list of options
+    to be passed in the
+    openvpn invocation
+    @rtype: list
+    @rparam: options
+    """
+    # XXX review which of the
+    # options we don't need.
+
+    # TODO pass also the config file,
+    # since we will need to take some
+    # things from there if present.
+
+    # get user/group name
+    # also from config.
+    user = os.getlogin()
+    gid = os.getgroups()[-1]
+    group = grp.getgrgid(gid).gr_name
+
+    opts = []
+    opts.append('--persist-tun')
+
+    # set user and group
+    opts.append('--user')
+    opts.append('%s' % user)
+    opts.append('--group')
+    opts.append('%s' % group)
+
+    opts.append('--management-client-user')
+    opts.append('%s' % user)
+    opts.append('--management-signal')
+
+    # set default options for management
+    # interface. unix sockets or telnet interface for win.
+    # XXX take them from the config object.
+
+    ourplatform = platform.system()
+    if ourplatform in ("Linux", "Mac"):
+        opts.append('--management')
+        opts.append('/tmp/.eip.sock')
+        opts.append('unix')
+    if ourplatform == "Windows":
+        opts.append('--management')
+        opts.append('localhost')
+        # XXX which is a good choice?
+        opts.append('7777')
+
+    # remaining config options, in a file
+    # NOTE: we will build this file from
+    # the service definition file.
+    ovpncnf = os.path.expanduser(
+        '~/.config/leap/openvpn.conf')
+    opts.append('--config')
+    opts.append(ovpncnf)
+
+    return opts
+
+
+def build_ovpn_command(config):
+    """
+    build a string with the
+    complete openvpn invocation
+
+    @param config: config object
+    @type config: ConfigParser instance
+
+    @rtype [string, [list of strings]]
+    @rparam: a list containing the command string
+        and a list of options.
+    """
+    command = []
+    use_pkexec = False
+    ovpn = None
+
+    if config.has_option('openvpn', 'openvpn_binary'):
+        ovpn = config.get('openvpn', 'openvpn_binary')
+    if not ovpn and config.has_option('DEFAULT', 'openvpn_binary'):
+        ovpn = config.get('DEFAULT', 'openvpn_binary')
+
+    if config.has_option('openvpn', 'use_pkexec'):
+        use_pkexec = config.get('openvpn', 'use_pkexec')
+
+    if use_pkexec:
+        command.append('pkexec')
+    if ovpn:
+        command.append(ovpn)
+
+    for opt in build_ovpn_options():
+        command.append(opt)
+
+    # XXX check len and raise proper error
+
+    return [command[0], command[1:]]
+
+
 def get_sensible_defaults():
     """
     gathers a dict of sensible defaults,
     platform sensitive,
     to be used to initialize the config parser
+    @rtype: dict
+    @rparam: default options.
     """
+
+    # this way we're passing a simple dict
+    # that will initialize the configparser
+    # and will get written to "DEFAULTS" section,
+    # which is fine for now.
+    # if we want to write to a particular section
+    # we can better pass a tuple of triples
+    # (('section1', 'foo', '23'),)
+    # and config.set them
+
     defaults = dict()
     defaults['openvpn_binary'] = which('openvpn')
+    defaults['autostart'] = 'true'
+
+    # TODO
+    # - management.
     return defaults
 
 
@@ -21,6 +136,9 @@ def get_config(config_file=None):
     mainly for early stage development process.
     in the future we will get preferences
     from the storage api
+
+    @rtype: ConfigParser instance
+    @rparam: a config object
     """
     # TODO
     # - refactor out common things and get
@@ -30,7 +148,8 @@ def get_config(config_file=None):
     config = ConfigParser.ConfigParser(defaults)
 
     if not config_file:
-        fpath = os.path.expanduser('~/.config/leap/eip.cfg')
+        fpath = os.path.expanduser(
+            '~/.config/leap/eip.cfg')
         if not os.path.isfile(fpath):
             dpath, cfile = os.path.split(fpath)
             if not os.path.isdir(dpath):
@@ -46,27 +165,16 @@ def get_config(config_file=None):
     #   for global settings.
     # - raise warnings/error if bad options.
 
-    try:
-        config.readfp(config_file)
-    except:
-        # XXX no file exists?
-        raise
-    return config
-
+    # at this point, the file should exist.
+    # errors would have been raised above.
+    config.readfp(config_file)
 
-# XXX wrapper around config? to get default values
-def get_with_defaults(config, section, option):
-    # XXX REMOVE ME
-    if config.has_option(section, option):
-        return config.get(section, option)
-    else:
-        # XXX lookup in defaults dict???
-        pass
+    return config
 
 
 def get_vpn_stdout_mockup():
     # XXX REMOVE ME
     command = "python"
-    args = ["-u", "-c", "from eip_client import fakeclient;\
-fakeclient.write_output()"]
+    args = ["-u", "-c", ("from eip_client import fakeclient;"
+                         "fakeclient.write_output()")]
     return command, args