X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=hippotat.git;a=blobdiff_plain;f=hippotat%2F__init__.py;h=6286f49bdeae63b1d3a4c1a50b3b95b6de934048;hp=029b22d7ddf245dcfa385459fc02a2762fc91cb2;hb=e8fcf3b7494f214242f8a0a8fe9c72fe7f7a27b1;hpb=84e763c719b4b659fd01eb3e116c6c615a7d2c1e

diff --git a/hippotat/__init__.py b/hippotat/__init__.py
index 029b22d..6286f49 100644
--- a/hippotat/__init__.py
+++ b/hippotat/__init__.py
@@ -7,8 +7,11 @@ import sys
 
 import twisted
 from twisted.internet import reactor
-from twisted.logger import LogLevel
 import twisted.internet.endpoints
+import twisted.logger
+from twisted.logger import LogLevel
+import twisted.python.constants
+from twisted.python.constants import NamedConstant
 
 import ipaddress
 from ipaddress import AddressValueError
@@ -19,11 +22,37 @@ from configparser import NoOptionError
 
 import collections
 import time
+import codecs
 
 import re as regexp
 
 import hippotat.slip as slip
 
+class DBG(twisted.python.constants.Names):
+  ROUTE = NamedConstant()
+  DROP = NamedConstant()
+  FLOW = NamedConstant()
+  HTTP = NamedConstant()
+  HTTP_CTRL = NamedConstant()
+  INIT = NamedConstant()
+  QUEUE = NamedConstant()
+  QUEUE_CTRL = NamedConstant()
+  HTTP_FULL = NamedConstant()
+
+_hex_codec = codecs.getencoder('hex_codec')
+
+log = twisted.logger.Logger()
+
+def log_debug(dflag, msg, idof=None, d=None):
+  #print('---------------->',repr((dflag, msg, idof, d)), file=sys.stderr)
+  if idof is not None:
+    msg = '[%d] %s' % (id(idof), msg)
+  if d is not None:
+    #d = d[0:64]
+    d = _hex_codec(d)[0].decode('ascii')
+    msg += ' ' + d
+  log.info('{dflag} {msgcore}', dflag=dflag, msgcore=msg)
+
 defcfg = '''
 [DEFAULT]
 #[<client>] overrides
@@ -34,6 +63,7 @@ target_requests_outstanding = 3  # must match; subject to [limits] on server
 max_requests_outstanding = 4     # used by client
 max_batch_up = 4000              # used by client
 http_timeout = 30                # used by client
+http_retry = 5                   # used by client
 
 #[server] or [<client>] overrides
 ipif = userv root ipif %(local)s,%(peer)s,%(mtu)s,slip %(rnets)s
@@ -83,10 +113,10 @@ class ConfigResults:
 
 c = ConfigResults()
 
-def log_discard(packet, saddr, daddr, why):
-  print('DROP ', saddr, daddr, why)
-#  syslog.syslog(syslog.LOG_DEBUG,
-#                'discarded packet %s -> %s (%s)' % (saddr, daddr, why))
+def log_discard(packet, iface, saddr, daddr, why):
+  log_debug(DBG.DROP,
+            'discarded packet [%s] %s -> %s: %s' % (iface, saddr, daddr, why),
+            d=packet)
 
 #---------- packet parsing ----------
 
@@ -156,7 +186,7 @@ class _IpifProcessProtocol(twisted.internet.protocol.ProcessProtocol):
   def slip_on_packet(self, packet):
     (saddr, daddr) = packet_addrs(packet)
     if saddr.is_link_local or daddr.is_link_local:
-      log_discard(packet, saddr, daddr, 'link-local')
+      log_discard(packet, 'ipif', saddr, daddr, 'link-local')
       return
     self._router(packet, saddr, daddr)
   def processEnded(self, status):
@@ -178,38 +208,59 @@ def queue_inbound(packet):
 #---------- packet queue ----------
 
 class PacketQueue():
-  def __init__(self, max_queue_time):
+  def __init__(self, desc, max_queue_time):
+    self._desc = desc
+    assert(desc + '')
     self._max_queue_time = max_queue_time
     self._pq = collections.deque() # packets
 
+  def _log(self, dflag, msg, **kwargs):
+    log_debug(dflag, self._desc+' pq: '+msg, **kwargs)
+
   def append(self, packet):
+    self._log(DBG.QUEUE, 'append', d=packet)
     self._pq.append((time.monotonic(), packet))
 
   def nonempty(self):
+    self._log(DBG.QUEUE, 'nonempty ?')
     while True:
       try: (queuetime, packet) = self._pq[0]
-      except IndexError: return False
+      except IndexError:
+        self._log(DBG.QUEUE, 'nonempty ? empty.')
+        return False
 
       age = time.monotonic() - queuetime
       if age > self._max_queue_time:
         # strip old packets off the front
+        self._log(DBG.QUEUE, 'dropping (old)', d=packet)
         self._pq.popleft()
         continue
 
+      self._log(DBG.QUEUE, 'nonempty ? nonempty.')
       return True
 
   def process(self, sizequery, moredata, max_batch):
     # sizequery() should return size of batch so far
     # moredata(s) should add s to batch
+    self._log(DBG.QUEUE, 'process...')
     while True:
       try: (dummy, packet) = self._pq[0]
-      except IndexError: break
+      except IndexError:
+        self._log(DBG.QUEUE, 'process... empty')
+        break
+
+      self._log(DBG.QUEUE_CTRL, 'process... packet', d=packet)
 
       encoded = slip.encode(packet)
       sofar = sizequery()  
 
+      self._log(DBG.QUEUE_CTRL,
+                'process... (sofar=%d, max=%d) encoded' % (sofar, max_batch),
+                d=encoded)
+
       if sofar > 0:
         if sofar + len(slip.delimiter) + len(encoded) > max_batch:
+          self._log(DBG.QUEUE_CTRL, 'process... overflow')
           break
         moredata(slip.delimiter)
 
@@ -218,7 +269,11 @@ class PacketQueue():
 
 #---------- error handling ----------
 
+_crashing = False
+
 def crash(err):
+  global _crashing
+  _crashing = True
   print('CRASH ', err, file=sys.stderr)
   try: reactor.stop()
   except twisted.internet.error.ReactorNotRunning: pass
@@ -242,7 +297,7 @@ def process_cfg_ipif(section, varmap):
     except AttributeError: continue
     setattr(c, d, v)
 
-  print(repr(c))
+  #print(repr(c))
 
   c.ipif_command = cfg.get(section,'ipif', vars=c.__dict__)
 
@@ -299,7 +354,11 @@ def process_cfg_clients(constructor):
 #---------- startup ----------
 
 def common_startup():
-  twisted.logger.globalLogPublisher.addObserver(crash_on_critical)
+  log_formatter = twisted.logger.formatEventAsClassicLogText
+  log_observer = twisted.logger.FileLogObserver(sys.stderr, log_formatter)
+  twisted.logger.globalLogBeginner.beginLoggingTo(
+    [ log_observer, crash_on_critical ]
+    )
 
   optparser.add_option('-c', '--config', dest='configfile',
                        default='/etc/hippotat/config')
@@ -311,5 +370,6 @@ def common_startup():
   cfg.read(opts.configfile)
 
 def common_run():
-  reactor.run()
+  log_debug(DBG.INIT, 'entering reactor')
+  if not _crashing: reactor.run()
   print('CRASHED (end)', file=sys.stderr)