[feature] parse status

- simple status parsing
- add separate firewall status
- set status for abnormal termination

1 files changed, 77 insertions, 0 deletions

diff --git a/src/leap/bitmask/vpn/_status.py b/src/leap/bitmask/vpn/_status.py
new file mode 100644
index 0000000..11d564f
--- /dev/null
+++ b/src/leap/bitmask/vpn/_status.py
@@ -0,0 +1,77 @@
+from itertools import chain, repeat
+from twisted.logger import Logger
+
+logger = Logger()
+
+
+# TODO implement a state machine in this class
+
+
+class VPNStatus(object):
+    """
+    A class containing different patterns in the openvpn output that
+    we can react upon.
+    """
+
+    _events = {
+        'NETWORK_UNREACHABLE': (
+            'Network is unreachable (code=101)',),
+        'PROCESS_RESTART_TLS': (
+            "SIGTERM[soft,tls-error]",),
+        'PROCESS_RESTART_PING': (
+            "SIGTERM[soft,ping-restart]",),
+        'INITIALIZATION_COMPLETED': (
+            "Initialization Sequence Completed",),
+    }
+
+    def __init__(self):
+        self.status = 'OFFLINE'
+        self._traffic_down = None
+        self._traffic_up = None
+
+    def watch(self, line):
+        """
+        Inspects line searching for the different patterns. If a match
+        is found, try to emit the corresponding signal.
+
+        :param line: a line of openvpn output
+        :type line: str
+        """
+        chained_iter = chain(*[
+            zip(repeat(key, len(l)), l)
+            for key, l in self._events.iteritems()])
+        for event, pattern in chained_iter:
+            if pattern in line:
+                break
+        else:
+            return
+
+        status, errcode = self._status_codes(event)
+        self.set_status(status, errcode)
+
+
+    def set_status(self, status, errcode):
+        self.status = status
+        self.errcode = errcode
+
+    def set_traffic_status(self, status):
+        down, up = status
+        self._traffic_up = up
+        self._traffic_down = down
+
+    def get_traffic_status(self):
+        # XXX return Human readable too
+        return {'down': self._traffic_down,
+                'up': self._traffic_up}
+
+    def _status_codes(self, event):
+        # TODO check good transitions
+        # TODO check valid states
+
+        _table = {
+            "network_unreachable": ('OFFLINE', 'network unreachable'),
+            "process_restart_tls": ('RESTARTING', 'restart tls'),
+            "process_restart_ping": ('CONNECTING', None),
+            "initialization_completed": ('ONLINE', None)
+        }
+        return _table.get(event.lower())