X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=hippotat.git;a=blobdiff_plain;f=hippotat%2F__init__.py;h=6de4d14c33e659b1bc91daa236ab86096c7b323d;hp=6286f49bdeae63b1d3a4c1a50b3b95b6de934048;hb=3297cac10f5726598246c6db6cf0efc4c51f355d;hpb=e8fcf3b7494f214242f8a0a8fe9c72fe7f7a27b1

diff --git a/hippotat/__init__.py b/hippotat/__init__.py
index 6286f49..6de4d14 100644
--- a/hippotat/__init__.py
+++ b/hippotat/__init__.py
@@ -23,6 +23,7 @@ from configparser import NoOptionError
 import collections
 import time
 import codecs
+import traceback
 
 import re as regexp
 
@@ -38,6 +39,7 @@ class DBG(twisted.python.constants.Names):
   QUEUE = NamedConstant()
   QUEUE_CTRL = NamedConstant()
   HTTP_FULL = NamedConstant()
+  SLIP_FULL = NamedConstant()
 
 _hex_codec = codecs.getencoder('hex_codec')
 
@@ -155,31 +157,39 @@ def ipnetwork(input):
 #---------- ipif (SLIP) subprocess ----------
 
 class SlipStreamDecoder():
-  def __init__(self, on_packet):
-    # we will call packet(<packet>)
+  def __init__(self, desc, on_packet):
     self._buffer = b''
     self._on_packet = on_packet
+    self._desc = desc
+    self._log('__init__')
+
+  def _log(self, msg, **kwargs):
+    log_debug(DBG.SLIP_FULL, 'slip %s: %s' % (self._desc, msg), **kwargs)
 
   def inputdata(self, data):
-    #print('SLIP-GOT ', repr(data))
-    self._buffer += data
-    packets = slip.decode(self._buffer)
+    self._log('inputdata', d=data)
+    data = self._buffer + data
+    self._buffer = b''
+    packets = slip.decode(data)
     self._buffer = packets.pop()
     for packet in packets:
       self._maybe_packet(packet)
+    self._log('inputdata bufremain', d=self._buffer)
 
   def _maybe_packet(self, packet):
-      if len(packet):
-        self._on_packet(packet)
+    self._log('inputdata maybepacket', d=packet)
+    if len(packet):
+      self._on_packet(packet)
 
   def flush(self):
+    self._log('inputdata flush')
     self._maybe_packet(self._buffer)
     self._buffer = b''
 
 class _IpifProcessProtocol(twisted.internet.protocol.ProcessProtocol):
   def __init__(self, router):
     self._router = router
-    self._decoder = SlipStreamDecoder(self.slip_on_packet)
+    self._decoder = SlipStreamDecoder('ipif', self.slip_on_packet)
   def connectionMade(self): pass
   def outReceived(self, data):
     self._decoder.inputdata(data)
@@ -201,6 +211,7 @@ def start_ipif(command, router):
                        env=None)
 
 def queue_inbound(packet):
+  log_debug(DBG.FLOW, "queue_inbound", d=packet)
   ipif.transport.write(slip.delimiter)
   ipif.transport.write(slip.encode(packet))
   ipif.transport.write(slip.delimiter)