Various little fixes.

[tripe] / tripemon.in

#! @PYTHON@
# -*-python-*-

#----- Dependencies ---------------------------------------------------------

import socket as S
from sys import argv, exit, stdin, stdout, stderr
import os as OS
from os import environ
import sets as SET
import getopt as O
import time as T
import sre as RX
from cStringIO import StringIO

import pygtk
pygtk.require('2.0')
import gtk as G
import gobject as GO
import gtk.gdk as GDK

#----- Configuration --------------------------------------------------------

tripedir = "@configdir@"
socketdir = "@socketdir@"
PACKAGE = "@PACKAGE@"
VERSION = "@VERSION@"

debug = False

#----- Utility functions ----------------------------------------------------

## Program name, shorn of extraneous stuff.
quis = OS.path.basename(argv[0])

def moan(msg):
  """Report a message to standard error."""
  stderr.write('%s: %s\n' % (quis, msg))

def die(msg, rc = 1):
  """Report a message to standard error and exit."""
  moan(msg)
  exit(rc)

rx_space = RX.compile(r'\s+')
rx_ordinary = RX.compile(r'[^\\\'\"\s]+')
rx_weird = RX.compile(r'([\\\'])')
rx_time = RX.compile(r'^(\d+)-(\d+)-(\d+)T(\d+):(\d+):(\d+)$')
rx_num = RX.compile(r'^[-+]?\d+$')

c_red = GDK.color_parse('red')

def getword(s):
  """Pull a word from the front of S, handling quoting according to the
  tripe-admin(5) rules.  Returns the word and the rest of S, or (None, None)
  if there are no more words left."""
  i = 0
  m = rx_space.match(s, i)
  if m: i = m.end()
  r = ''
  q = None
  if i >= len(s):
    return None, None
  while i < len(s) and (q or not s[i].isspace()):
    m = rx_ordinary.match(s, i)
    if m:
      r += m.group()
      i = m.end()
    elif s[i] == '\\':
      r += s[i + 1]
      i += 2
    elif s[i] == q:
      q = None
      i += 1
    elif not q and s[i] == '`' or s[i] == "'":
      q = "'"
      i += 1
    elif not q and s[i] == '"':
      q = '"'
      i += 1
    else:
      r += s[i]
      i += 1
  if q:
    raise SyntaxError, 'missing close quote'
  m = rx_space.match(s, i)
  if m: i = m.end()
  return r, s[i:]

def quotify(s):
  """Quote S according to the tripe-admin(5) rules."""
  m = rx_ordinary.match(s)
  if m and m.end() == len(s):
    return s
  else:
    return "'" + rx_weird.sub(r'\\\1', s) + "'"

#----- Random bits of infrastructure ----------------------------------------

class struct (object):
  """Simple object which stores attributes and has a sensible construction
  syntax."""
  def __init__(me, **kw):
    me.__dict__.update(kw)

class peerinfo (struct): pass
class pingstate (struct): pass

def invoker(func):
  """Return a function which throws away its arguments and calls FUNC.  (If
  for loops worked by binding rather than assignment then we wouldn't need
  this kludge."""
  return lambda *hunoz, **hukairz: func()

class HookList (object):
  """I maintain a list of functions, and provide the ability to call them
  when something interesting happens.  The functions are called in the order
  they were added to the list, with all the arguments.  If a function returns
  a non-None result, no further functions are called."""
  def __init__(me):
    me.list = []
  def add(me, func, obj):
    me.list.append((obj, func))
  def prune(me, obj):
    new = []
    for o, f in me.list:
      if o is not obj:
        new.append((o, f))
    me.list = new
  def run(me, *args, **kw):
    for o, hook in me.list:
      rc = hook(*args, **kw)
      if rc is not None: return rc
    return None

class HookClient (object):
  def __init__(me):
    me.hooks = SET.Set()
  def hook(me, hk, func):
    hk.add(func, me)
    me.hooks.add(hk)
  def unhook(me, hk):
    hk.prune(me)
    me.hooks.discard(hk)
  def unhookall(me):
    for hk in me.hooks:
      hk.prune(me)
    me.hooks.clear()
  ##def __del__(me):
  ##  print '%s dying' % me

#----- Connections and commands ---------------------------------------------

class ConnException (Exception):
  """Some sort of problem occurred while communicating with the tripe
  server."""
  pass

class Error (ConnException):
  """A command caused the server to issue a FAIL message."""
  pass

class ConnectionFailed (ConnException):
  """The connection failed while communicating with the server."""

jobid_seq = 0
def jobid():
  """Return a job tag.  Used for background commands."""
  global jobid_seq
  jobid_seq += 1
  return 'bg-%d' % jobid_seq

class BackgroundCommand (HookClient):
  def __init__(me, conn, cmd):
    HookClient.__init__(me)
    me.conn = conn
    me.tag = None
    me.cmd = cmd
    me.donehook = HookList()
    me.losthook = HookList()
    me.info = []
    me.submit()
    me.hook(me.conn.disconnecthook, me.lost)
  def submit(me):
    me.conn.bgcommand(me.cmd, me)
  def lost(me):
    me.losthook.run()
    me.unhookall()
  def fail(me, msg):
    me.conn.error("Unexpected error from server command `%s': %s" %
                  (me.cmd % msg))
    me.unhookall()
  def ok(me):
    me.donehook.run(me.info)
    me.unhookall()

class SimpleBackgroundCommand (BackgroundCommand):
  def submit(me):
    try:
      BackgroundCommand.submit(me)
    except ConnectionFailed, err:
      me.conn.error('Unexpected error communicating with server: %s' % msg)
      raise

class Connection (HookClient):

  """I represent a connection to the TrIPE server.  I provide facilities for
  sending commands and receiving replies.  The connection is notional: the
  underlying socket connection can come and go under our feet.

  Useful attributes:
  connectedp: whether the connection is active
  connecthook: called when we have connected
  disconnecthook: called if we have disconnected
  notehook: called with asynchronous notifications
  errorhook: called if there was a command error"""

  def __init__(me, sockname):
    """Make a new connection to the server listening to SOCKNAME.  In fact,
    we're initially disconnected, to allow the caller to get his life in
    order before opening the floodgates."""
    HookClient.__init__(me)
    me.sockname = sockname
    me.sock = None
    me.connectedp = False
    me.connecthook = HookList()
    me.disconnecthook = HookList()
    me.errorhook = HookList()
    me.inbuf = ''
    me.info = []
    me.waitingp = False
    me.bgcmd = None
    me.bgmap = {}
  def connect(me):
    "Connect to the server.  Runs connecthook if it works."""
    if me.sock: return
    sock = S.socket(S.AF_UNIX, S.SOCK_STREAM)
    try:
      sock.connect(me.sockname)
    except S.error, err:
      me.error('error opening connection: %s' % err[1])
      me.disconnecthook.run()
      return
    sock.setblocking(0)
    me.socketwatch = GO.io_add_watch(sock, GO.IO_IN, me.ready)
    me.sock = sock
    me.connectedp = True
    me.connecthook.run()
  def disconnect(me):
    "Disconnects from the server.  Runs disconnecthook."
    if not me.sock: return
    GO.source_remove(me.socketwatch)
    me.sock.close()
    me.sock = None
    me.connectedp = False
    me.disconnecthook.run()
  def error(me, msg):
    """Reports an error on the connection."""
    me.errorhook.run(msg)

  def bgcommand(me, cmd, bg):
    """Sends a background command and feeds it properly."""
    try:
      me.bgcmd = bg
      err = me.docommand(cmd)
      if err:
        bg.fail(err)
    finally:
      me.bgcmd = None
  def command(me, cmd):
    """Sends a command to the server.  Returns a list of INFO responses.  Do
    not use this for backgrounded commands: create a BackgroundCommand
    instead.  Raises apprpopriate exceptions on error, but doesn't send
    report them to the errorhook."""
    err = me.docommand(cmd)
    if err:
      raise Error, err
    return me.info
  def docommand(me, cmd):
    if not me.sock:
      raise ConnException, 'not connected'
    if debug: print ">>> %s" % cmd
    me.sock.sendall(cmd + '\n')
    me.waitingp = True
    me.info = []
    try:
      me.sock.setblocking(1)
      while True:
        rc, err = me.collect()
        if rc: break
    finally:
      me.waitingp = False
      me.sock.setblocking(0)
      if len(me.inbuf) > 0:
        GO.idle_add(lambda: me.flushbuf() and False)
    return err
  def simplecmd(me, cmd):
    """Like command(), but reports errors via the errorhook as well as
    raising exceptions."""
    try:
      i = me.command(cmd)
    except Error, msg:
      me.error("Unexpected error from server command `%s': %s" % (cmd, msg))
      raise
    except ConnectionFailed, msg:
      me.error("Unexpected error communicating with server: %s" % msg);
      raise
    return i
  def ready(me, sock, condition):
    try:
      me.collect()
    except ConnException, msg:
      me.error("Error watching server connection: %s" % msg)
      if me.sock:
        me.disconnect()
        me.connect()
    return True
  def collect(me):
    data = me.sock.recv(16384)
    if data == '':
      me.disconnect()
      raise ConnectionFailed, 'server disconnected'
    me.inbuf += data
    return me.flushbuf()
  def flushbuf(me):
    while True:
      nl = me.inbuf.find('\n')
      if nl < 0: break
      line = me.inbuf[:nl]
      if debug: print "<<< %s" % line
      me.inbuf = me.inbuf[nl + 1:]
      tag, line = getword(line)
      rc, err = me.parseline(tag, line)
      if rc: return rc, err
    return False, None
  def parseline(me, code, line):
    if code == 'BGDETACH':
      if not me.bgcmd:
        raise ConnectionFailed, 'unexpected detach'
      me.bgcmd.tag = line
      me.bgmap[line] = me.bgcmd
      me.waitingp = False
      me.bgcmd = None
      return True, None
    elif code == 'BGINFO':
      tag, line = getword(line)
      me.bgmap[tag].info.append(line)
      return False, None
    elif code == 'BGFAIL':
      tag, line = getword(line)
      me.bgmap[tag].fail(line)
      del me.bgmap[tag]
      return False, None
    elif code == 'BGOK':
      tag, line = getword(line)
      me.bgmap[tag].ok()
      del me.bgmap[tag]
      return False, None
    elif code == 'INFO':
      if not me.waitingp or me.bgcmd:
        raise ConnectionFailed, 'unexpected INFO response'
      me.info.append(line)
      return False, None
    elif code == 'OK':
      if not me.waitingp or me.bgcmd:
        raise ConnectionFailed, 'unexpected OK response'
      return True, None
    elif code == 'FAIL':
      if not me.waitingp:
        raise ConnectionFailed, 'unexpected FAIL response'
      return True, line
    else:
      raise ConnectionFailed, 'unknown response code `%s' % code

class Monitor (Connection):
  """I monitor a TrIPE server, noticing when it changes state and keeping
  track of its peers.  I also provide facilities for sending the server
  commands and collecting the answers.

  Useful attributes:
  addpeerhook: called with a new Peer when the server adds one
  delpeerhook: called with a Peer when the server kills one
  tracehook: called with a trace message
  warnhook: called with a warning message
  peers: mapping from names to Peer objects"""
  def __init__(me, sockname):
    """Initializes the monitor."""
    Connection.__init__(me, sockname)
    me.addpeerhook = HookList()
    me.delpeerhook = HookList()
    me.tracehook = HookList()
    me.warnhook = HookList()
    me.notehook = HookList()
    me.hook(me.connecthook, me.connected)
    me.delay = []
    me.peers = {}
  def addpeer(me, peer):
    if peer not in me.peers:
      p = Peer(me, peer)
      me.peers[peer] = p
      me.addpeerhook.run(p)
  def delpeer(me, peer):
    if peer in me.peers:
      p = me.peers[peer]
      me.delpeerhook.run(p)
      p.dead()
      del me.peers[peer]
  def updatelist(me, peers):
    newmap = {}
    for p in peers:
      newmap[p] = True
      if p not in me.peers:
        me.addpeer(p)
    oldpeers = me.peers.copy()
    for p in oldpeers:
      if p not in newmap:
        me.delpeer(p)
  def connected(me):
    try:
      me.simplecmd('WATCH -A+wnt')
      me.updatelist([s.strip() for s in me.simplecmd('LIST')])
    except ConnException:
      me.disconnect()
      return
  def parseline(me, code, line):
    ## Delay async messages until the current command is done.  Otherwise the
    ## handler for the async message might send another command before this
    ## one's complete, and the whole edifice turns to jelly.
    ##
    ## No, this isn't the server's fault.  If we rely on the server to delay
    ## notifications then there's a race between when we send a command and
    ## when the server gets it.
    if me.waitingp and code in ('TRACE', 'WARN', 'NOTE'):
      if len(me.delay) == 0: GO.idle_add(me.flushdelay)
      me.delay.append((code, line))
    elif code == 'TRACE':
      me.tracehook.run(line)
    elif code == 'WARN':
      me.warnhook.run(line)
    elif code == 'NOTE':
      note, line = getword(line)
      me.notehook.run(note, line)
      if note == 'ADD':
        me.addpeer(getword(line)[0])
      elif note == 'KILL':
        me.delpeer(line)
      else:
        ## Well, I asked for it.
        pass
    else:
      return Connection.parseline(me, code, line)
    return False, None
  def flushdelay(me):
    delay = me.delay
    me.delay = []
    for tag, line in delay:
      me.parseline(tag, line)
    return False

def parseinfo(info):
  """Parse key=value output into a dictionary."""
  d = {}
  for i in info:
    for w in i.split(' '):
      q = w.index('=')
      d[w[:q]] = w[q + 1:]
  return d

class Peer (object):
  """I represent a TrIPE peer.  Useful attributes are:

  name: peer's name
  addr: human-friendly representation of the peer's address
  ifname: interface associated with the peer
  alivep: true if the peer hasn't been killed
  deadhook: called with no arguments when the peer is killed"""
  def __init__(me, monitor, name):
    me.mon = monitor
    me.name = name
    addr = me.mon.simplecmd('ADDR %s' % name)[0].split(' ')
    if addr[0] == 'INET':
      ipaddr, port = addr[1:]
      try:
        name = S.gethostbyaddr(ipaddr)[0]
        me.addr = 'INET %s:%s [%s]' % (name, port, ipaddr)
      except S.herror:
        me.addr = 'INET %s:%s' % (ipaddr, port)
    else:
      me.addr = ' '.join(addr)
    me.ifname = me.mon.simplecmd('IFNAME %s' % me.name)[0]
    me.__dict__.update(parseinfo(me.mon.simplecmd('PEERINFO %s' % me.name)))
    me.deadhook = HookList()
    me.alivep = True
  def dead(me):
    me.alivep = False
    me.deadhook.run()

#----- Window management cruft ----------------------------------------------

class MyWindowMixin (G.Window, HookClient):
  """Mixin for windows which call a closehook when they're destroyed."""
  def mywininit(me):
    me.closehook = HookList()
    HookClient.__init__(me)
    me.connect('destroy', invoker(me.close))
  def close(me):
    me.closehook.run()
    me.destroy()
    me.unhookall()
class MyWindow (MyWindowMixin):
  """A window which calls a closehook when it's destroyed."""
  def __init__(me, kind = G.WINDOW_TOPLEVEL):
    G.Window.__init__(me, kind)
    me.mywininit()
class MyDialog (G.Dialog, MyWindowMixin, HookClient):
  """A dialogue box with a closehook and sensible button binding."""
  def __init__(me, title = None, flags = 0, buttons = []):
    """The buttons are a list of (STOCKID, THUNK) pairs: call the appropriate
    THUNK when the button is pressed.  The others are just like GTK's Dialog
    class."""
    i = 0
    br = []
    me.rmap = []
    for b, f in buttons:
      br.append(b)
      br.append(i)
      me.rmap.append(f)
      i += 1
    G.Dialog.__init__(me, title, None, flags, tuple(br))
    HookClient.__init__(me)
    me.mywininit()
    me.set_default_response(i - 1)
    me.connect('response', me.respond)
  def respond(me, hunoz, rid, *hukairz):
    if rid >= 0: me.rmap[rid]()

def makeactiongroup(name, acts):
  """Creates an ActionGroup called NAME.  ACTS is a list of tuples
  containing:
  ACT: an action name
  LABEL: the label string for the action
  ACCEL: accelerator string, or None
  FUNC: thunk to call when the action is invoked"""
  actgroup = G.ActionGroup(name)
  for act, label, accel, func in acts:
    a = G.Action(act, label, None, None)
    if func: a.connect('activate', invoker(func))
    actgroup.add_action_with_accel(a, accel)
  return actgroup

class GridPacker (G.Table):
  """Like a Table, but with more state: makes filling in the widgets
  easier."""
  def __init__(me):
    G.Table.__init__(me)
    me.row = 0
    me.col = 0
    me.rows = 1
    me.cols = 1
    me.set_border_width(4)
    me.set_col_spacings(4)
    me.set_row_spacings(4)
  def pack(me, w, width = 1, newlinep = False,
           xopt = G.EXPAND | G.FILL | G.SHRINK, yopt = 0,
           xpad = 0, ypad = 0):
    """Packs a new widget.  W is the widget to add.  XOPY, YOPT, XPAD and
    YPAD are as for Table.  WIDTH is how many cells to take up horizontally.
    NEWLINEP is whether to start a new line for this widget.  Returns W."""
    if newlinep:
      me.row += 1
      me.col = 0
    bot = me.row + 1
    right = me.col + width
    if bot > me.rows or right > me.cols:
      if bot > me.rows: me.rows = bot
      if right > me.cols: me.cols = right
      me.resize(me.rows, me.cols)
    me.attach(w, me.col, me.col + width, me.row, me.row + 1,
              xopt, yopt, xpad, ypad)
    me.col += width
    return w
  def labelled(me, lab, w, newlinep = False, **kw):
    """Packs a labelled widget.  Other arguments are as for pack.  Returns
    W."""
    label = G.Label(lab)
    label.set_alignment(1.0, 0)
    me.pack(label, newlinep = newlinep, xopt = G.FILL)
    me.pack(w, **kw)
    return w
  def info(me, label, text = None, len = 18, **kw):
    """Packs an information widget with a label.  LABEL is the label; TEXT is
    the initial text; LEN is the estimated length in characters.  Returns the
    entry widget."""
    e = G.Entry()
    if text is not None: e.set_text(text)
    e.set_width_chars(len)
    e.set_editable(False)
    me.labelled(label, e, **kw)
    return e

class WindowSlot (HookClient):
  """A place to store a window.  If the window is destroyed, remember this;
  when we come to open the window, raise it if it already exists; otherwise
  make a new one."""
  def __init__(me, createfunc):
    """Constructor: CREATEFUNC must return a new Window which supports the
    closehook protocol."""
    HookClient.__init__(me)
    me.createfunc = createfunc
    me.window = None
  def open(me):
    """Opens the window, creating it if necessary."""
    if me.window:
      me.window.window.raise_()
    else:
      me.window = me.createfunc()
      me.hook(me.window.closehook, me.closed)
  def closed(me):
    me.unhook(me.window.closehook)
    me.window = None

class ValidationError (Exception):
  """Raised by ValidatingEntry.get_text() if the text isn't valid."""
  pass
class ValidatingEntry (G.Entry):
  """Like an Entry, but makes the text go red if the contents are invalid.
  If get_text is called, and the text is invalid, ValidationError is
  raised."""
  def __init__(me, valid, text = '', size = -1, *arg, **kw):
    """Make an Entry.  VALID is a regular expression or a predicate on
    strings.  TEXT is the default text to insert.  SIZE is the size of the
    box to set, in characters (ish).  Other arguments are passed to Entry."""
    G.Entry.__init__(me, *arg, **kw)
    me.connect("changed", me.check)
    if callable(valid):
      me.validate = valid
    else:
      me.validate = RX.compile(valid).match
    me.ensure_style()
    me.c_ok = me.get_style().text[G.STATE_NORMAL]
    me.c_bad = c_red
    if size != -1: me.set_width_chars(size)
    me.set_activates_default(True)
    me.set_text(text)
    me.check()
  def check(me, *hunoz):
    if me.validate(G.Entry.get_text(me)):
      me.validp = True
      me.modify_text(G.STATE_NORMAL, me.c_ok)
    else:
      me.validp = False
      me.modify_text(G.STATE_NORMAL, me.c_bad)
  def get_text(me):
    if not me.validp:
      raise ValidationError
    return G.Entry.get_text(me)

def numericvalidate(min = None, max = None):
  """Validation function for numbers.  Entry must consist of an optional sign
  followed by digits, and the resulting integer must be within the given
  bounds."""
  return lambda x: (rx_num.match(x) and
                    (min is None or long(x) >= min) and
                    (max is None or long(x) <= max))

#----- Various minor dialog boxen -------------------------------------------

GPL = """This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA."""

class AboutBox (G.AboutDialog, MyWindowMixin):
  """The program `About' box."""
  def __init__(me):
    G.AboutDialog.__init__(me)
    me.mywininit()
    me.set_name('TrIPEmon')
    me.set_version(VERSION)
    me.set_license(GPL)
    me.set_authors(['Mark Wooding'])
    me.connect('unmap', invoker(me.close))
    me.show()
aboutbox = WindowSlot(AboutBox)

def moanbox(msg):
  """Report an error message in a window."""
  d = G.Dialog('Error from %s' % quis,
               flags = G.DIALOG_MODAL,
               buttons = ((G.STOCK_OK, G.RESPONSE_NONE)))
  label = G.Label(msg)
  label.set_padding(20, 20)
  d.vbox.pack_start(label)
  label.show()
  d.run()
  d.destroy()

def unimplemented(*hunoz):
  """Indicator of laziness."""
  moanbox("I've not written that bit yet.")

class ServInfo (MyWindow):
  def __init__(me, monitor):
    MyWindow.__init__(me)
    me.set_title('TrIPE server info')
    me.mon = monitor
    me.table = GridPacker()
    me.add(me.table)
    me.e = {}
    def add(label, tag, text = None, **kw):
      me.e[tag] = me.table.info(label, text, **kw)
    add('Implementation', 'implementation')
    add('Version', 'version', newlinep = True)
    me.update()
    me.hook(me.mon.connecthook, me.update)
    me.show_all()
  def update(me):
    info = parseinfo(me.mon.simplecmd('SERVINFO'))
    for i in me.e:
      me.e[i].set_text(info[i])

class TraceOptions (MyDialog):
  """Tracing options window."""
  def __init__(me, monitor):
    MyDialog.__init__(me, title = 'Tracing options',
                      buttons = [(G.STOCK_CLOSE, me.destroy),
                                 (G.STOCK_OK, me.ok)])
    me.mon = monitor
    me.opts = []
    for o in me.mon.simplecmd('TRACE'):
      char = o[0]
      onp = o[1]
      text = o[3].upper() + o[4:]
      if char.isupper(): continue
      ticky = G.CheckButton(text)
      ticky.set_active(onp != ' ')
      me.vbox.pack_start(ticky)
      me.opts.append((char, ticky))
    me.show_all()
  def ok(me):
    on = []
    off = []
    for char, ticky in me.opts:
      if ticky.get_active():
        on.append(char)
      else:
        off.append(char)
    setting = ''.join(on) + '-' + ''.join(off)
    me.mon.simplecmd('TRACE %s' % setting)
    me.destroy()

#----- Logging windows ------------------------------------------------------

class LogModel (G.ListStore):
  """A simple list of log messages."""
  def __init__(me, columns):
    """Call with a list of column names.  All must be strings.  We add a time
    column to the left."""
    me.cols = ('Time',) + columns
    G.ListStore.__init__(me, *((GO.TYPE_STRING,) * len(me.cols)))
  def add(me, *entries):
    """Adds a new log message, with a timestamp."""
    now = T.strftime('%Y-%m-%d %H:%M:%S')
    me.append((now,) + entries)

class TraceLogModel (LogModel):
  """Log model for trace messages."""
  def __init__(me):
    LogModel.__init__(me, ('Message',))
  def notify(me, line):
    """Call with a new trace message."""
    me.add(line)

class WarningLogModel (LogModel):
  """Log model for warnings.  We split the category out into a separate
  column."""
  def __init__(me):
    LogModel.__init__(me, ('Category', 'Message'))
  def notify(me, line):
    """Call with a new warning message."""
    me.add(*getword(line))

class LogViewer (MyWindow):
  """Log viewer window.  Nothing very exciting."""
  def __init__(me, model):
    MyWindow.__init__(me)
    me.model = model
    scr = G.ScrolledWindow()
    scr.set_policy(G.POLICY_AUTOMATIC, G.POLICY_AUTOMATIC)
    me.list = G.TreeView(me.model)
    me.closehook = HookList()
    i = 0
    for c in me.model.cols:
      me.list.append_column(G.TreeViewColumn(c,
                                             G.CellRendererText(),
                                             text = i))
      i += 1
    me.set_default_size(440, 256)
    scr.add(me.list)
    me.add(scr)
    me.show_all()

#----- Peer window ----------------------------------------------------------

def xlate_time(t):
  """Translate a time in tripe's stats format to something a human might
  actually want to read."""
  if t == 'NEVER': return '(never)'
  Y, M, D, h, m, s = map(int, rx_time.match(t).group(1, 2, 3, 4, 5, 6))
  return '%04d:%02d:%02d %02d:%02d:%02d' % (Y, M, D, h, m, s)
def xlate_bytes(b):
  """Translate a number of bytes into something a human might want to read."""
  suff = 'B'
  b = int(b)
  for s in 'KMG':
    if b < 4096: break
    b /= 1024
    suff = s
  return '%d %s' % (b, suff)

## How to translate peer stats.  Maps the stat name to a translation
## function.
statsxlate = \
  [('start-time', xlate_time),
   ('last-packet-time', xlate_time),
   ('last-keyexch-time', xlate_time),
   ('bytes-in', xlate_bytes),
   ('bytes-out', xlate_bytes),
   ('keyexch-bytes-in', xlate_bytes),
   ('keyexch-bytes-out', xlate_bytes),
   ('ip-bytes-in', xlate_bytes),
   ('ip-bytes-out', xlate_bytes)]

## How to lay out the stats dialog.  Format is (LABEL, FORMAT): LABEL is
## the label to give the entry box; FORMAT is the format string to write into
## the entry.
statslayout = \
  [('Start time', '%(start-time)s'),
   ('Last key-exchange', '%(last-keyexch-time)s'),
   ('Last packet', '%(last-packet-time)s'),
   ('Packets in/out',
    '%(packets-in)s (%(bytes-in)s) / %(packets-out)s (%(bytes-out)s)'),
   ('Key-exchange in/out',
    '%(keyexch-packets-in)s (%(keyexch-bytes-in)s) / %(keyexch-packets-out)s (%(keyexch-bytes-out)s)'),
   ('IP in/out',
    '%(ip-packets-in)s (%(ip-bytes-in)s) / %(ip-packets-in)s (%(ip-bytes-in)s)'),
   ('Rejected packets', '%(rejected-packets)s')]

class PeerWindow (MyWindow):
  """Show information about a peer."""
  def __init__(me, monitor, peer):
    MyWindow.__init__(me)
    me.set_title('TrIPE statistics: %s' % peer.name)
    me.mon = monitor
    me.peer = peer
    table = GridPacker()
    me.add(table)
    me.e = {}
    def add(label, text = None):
      me.e[label] = table.info(label, text, len = 42, newlinep = True)
    add('Peer name', peer.name)
    add('Tunnel', peer.tunnel)
    add('Interface', peer.ifname)
    add('Keepalives',
        (peer.keepalive == '0' and 'never') or '%s s' % peer.keepalive)
    add('Address', peer.addr)
    add('Transport pings')
    add('Encrypted pings')
    for label, format in statslayout: add(label)
    me.timeout = None
    me.hook(me.mon.connecthook, me.tryupdate)
    me.hook(me.mon.disconnecthook, me.stopupdate)
    me.hook(me.closehook, me.stopupdate)
    me.hook(me.peer.deadhook, me.dead)
    me.hook(me.peer.pinghook, me.ping)
    me.tryupdate()
    me.ping()
    me.show_all()
  def update(me):
    if not me.peer.alivep or not me.mon.connectedp: return False
    stat = parseinfo(me.mon.simplecmd('STATS %s' % me.peer.name))
    for s, trans in statsxlate:
      stat[s] = trans(stat[s])
    for label, format in statslayout:
      me.e[label].set_text(format % stat)
    return True
  def tryupdate(me):
    if me.timeout is None and me.update():
      me.timeout = GO.timeout_add(1000, me.update)
  def stopupdate(me):
    if me.timeout is not None:
      GO.source_remove(me.timeout)
      me.timeout = None
  def dead(me):
    me.set_title('TrIPE statistics: %s [defunct]' % me.peer.name)
    me.e['Peer name'].set_text('%s [defunct]' % me.peer.name)
    me.stopupdate()
  def ping(me):
    for ping in me.peer.ping, me.peer.eping:
      s = '%d/%d' % (ping.ngood, ping.n)
      if ping.ngood:
        s += '; %.2f ms (last %.1f ms)' % (ping.ttot/ping.ngood, ping.tlast);
      me.e[ping.cmd].set_text(s)

#----- Add peer -------------------------------------------------------------

class AddPeerCommand (SimpleBackgroundCommand):
  def __init__(me, conn, dlg, name, addr, port,
               keepalive = None, tunnel = None):
    me.name = name
    me.addr = addr
    me.port = port
    me.keepalive = keepalive
    me.tunnel = tunnel
    cmd = StringIO()
    cmd.write('ADD %s' % name)
    cmd.write(' -background %s' % jobid())
    if keepalive is not None: cmd.write(' -keepalive %s' % keepalive)
    if tunnel is not None: cmd.write(' -tunnel %s' % tunnel)
    cmd.write(' INET %s %s' % (addr, port))
    SimpleBackgroundCommand.__init__(me, conn, cmd.getvalue())
    me.hook(me.donehook, invoker(dlg.destroy))
  def fail(me, err):
    token, msg = getword(str(err))
    if token in ('resolve-error', 'resolver-timeout'):
      moanbox("Unable to resolve hostname `%s'" % me.addr)
    elif token == 'peer-create-fail':
      moanbox("Couldn't create new peer `%s'" % me.name)
    elif token == 'peer-exists':
      moanbox("Peer `%s' already exists" % me.name)
    else:
      moanbox("Unexpected error from server command `ADD': %s" % err)

class AddPeerDialog (MyDialog):
  def __init__(me, monitor):
    MyDialog.__init__(me, 'Add peer',
                      buttons = [(G.STOCK_CANCEL, me.destroy),
                                 (G.STOCK_OK, me.ok)])
    me.mon = monitor
    table = GridPacker()
    me.vbox.pack_start(table)
    me.e_name = table.labelled('Name',
                               ValidatingEntry(r'^[^\s.:]+$', '', 16),
                               width = 3)
    me.e_addr = table.labelled('Address',
                               ValidatingEntry(r'^[a-zA-Z0-9.-]+$', '', 24),
                               newlinep = True)
    me.e_port = table.labelled('Port',
                               ValidatingEntry(numericvalidate(0, 65535),
                                               '22003',
                                               5))
    me.c_keepalive = G.CheckButton('Keepalives')
    me.l_tunnel = table.labelled('Tunnel',
                                 G.combo_box_new_text(),
                                 newlinep = True, width = 3)
    me.tuns = me.mon.simplecmd('TUNNELS')
    for t in me.tuns:
      me.l_tunnel.append_text(t)
    me.l_tunnel.set_active(0)
    table.pack(me.c_keepalive, newlinep = True, xopt = G.FILL)
    me.c_keepalive.connect('toggled',
                           lambda t: me.e_keepalive.set_sensitive\
                                      (t.get_active()))
    me.e_keepalive = ValidatingEntry(r'^\d+[hms]?$', '', 5)
    me.e_keepalive.set_sensitive(False)
    table.pack(me.e_keepalive, width = 3)
    me.show_all()
  def ok(me):
    try:
      if me.c_keepalive.get_active():
        ka = me.e_keepalive.get_text()
      else:
        ka = None
      t = me.l_tunnel.get_active()
      if t == 0:
        tun = None
      else:
        tun = me.tuns[t]
      AddPeerCommand(me.mon, me,
                     me.e_name.get_text(),
                     me.e_addr.get_text(),
                     me.e_port.get_text(),
                     keepalive = ka,
                     tunnel = tun)
    except ValidationError:
      GDK.beep()
      return

#----- The server monitor ---------------------------------------------------

class PingCommand (SimpleBackgroundCommand):
  def __init__(me, conn, cmd, peer, func):
    me.peer = peer
    me.func = func
    SimpleBackgroundCommand.__init__ \
      (me, conn, '%s -background %s %s' % (cmd, jobid(), peer.name))
  def ok(me):
    tok, rest = getword(me.info[0])
    if tok == 'ping-ok':
      me.func(me.peer, float(rest))
    else:
      me.func(me.peer, None)
    me.unhookall()
  def fail(me, err): me.unhookall()
  def lost(me): me.unhookall()

class MonitorWindow (MyWindow):

  def __init__(me, monitor):
    MyWindow.__init__(me)
    me.set_title('TrIPE monitor')
    me.mon = monitor
    me.hook(me.mon.errorhook, me.report)
    me.warnings = WarningLogModel()
    me.hook(me.mon.warnhook, me.warnings.notify)
    me.trace = TraceLogModel()
    me.hook(me.mon.tracehook, me.trace.notify)

    me.warnview = WindowSlot(lambda: LogViewer(me.warnings))
    me.traceview = WindowSlot(lambda: LogViewer(me.trace))
    me.traceopts = WindowSlot(lambda: TraceOptions(me.mon))
    me.addpeerwin = WindowSlot(lambda: AddPeerDialog(me.mon))
    me.servinfo = WindowSlot(lambda: ServInfo(me.mon))

    vbox = G.VBox()
    me.add(vbox)

    me.ui = G.UIManager()
    def cmd(c): me.mon.simplecmd(c)
    actgroup = makeactiongroup('monitor',
      [('file-menu', '_File', None, None),
       ('connect', '_Connect', '<Alt>C', me.mon.connect),
       ('disconnect', '_Disconnect', '<Alt>D', me.mon.disconnect),
       ('quit', '_Quit', '<Alt>Q', me.close),
       ('server-menu', '_Server', None, None),
       ('daemon', 'Run in _background', None, cmd('DAEMON')),
       ('server-version', 'Server version', '<Alt>V', me.servinfo.open),
       ('reload-keys', 'Reload keys', '<Alt>R', cmd('RELOAD')),
       ('server-quit', 'Terminate server', None, cmd('QUIT')),
       ('logs-menu', '_Logs', None, None),
       ('show-warnings', 'Show _warnings', '<Alt>W', me.warnview.open),
       ('show-trace', 'Show _trace', '<Alt>T', me.traceview.open),
       ('trace-options', 'Trace _options...', None, me.traceopts.open),
       ('help-menu', '_Help', None, None),
       ('about', '_About tripemon...', None, aboutbox.open),
       ('add-peer', '_Add peer...', '<Alt>A', me.addpeerwin.open),
       ('kill-peer', '_Kill peer', None, me.killpeer),
       ('force-kx', 'Force key e_xchange', None, me.forcekx)])
    uidef = '''
      <ui>
        <menubar>
          <menu action="file-menu">
            <menuitem action="quit"/>
          </menu>
          <menu action="server-menu">
             <menuitem action="connect"/>
            <menuitem action="disconnect"/>
            <separator/>
            <menuitem action="server-version"/>
            <menuitem action="add-peer"/>
            <menuitem action="daemon"/>
            <menuitem action="reload-keys"/>
            <separator/>
            <menuitem action="server-quit"/>
          </menu>
          <menu action="logs-menu">
            <menuitem action="show-warnings"/>
            <menuitem action="show-trace"/>
            <menuitem action="trace-options"/>
          </menu>
          <menu action="help-menu">
            <menuitem action="about"/>
          </menu>
        </menubar>
        <popup name="peer-popup">
          <menuitem action="add-peer"/>
          <menuitem action="kill-peer"/>
          <menuitem action="force-kx"/>
        </popup>
      </ui>
      '''
    me.ui.insert_action_group(actgroup, 0)
    me.ui.add_ui_from_string(uidef)
    vbox.pack_start(me.ui.get_widget('/menubar'), expand = False)
    me.add_accel_group(me.ui.get_accel_group())
    me.status = G.Statusbar()

    me.listmodel = G.ListStore(*(GO.TYPE_STRING,) * 6)
    me.listmodel.set_sort_column_id(0, G.SORT_ASCENDING)
    me.hook(me.mon.addpeerhook, me.addpeer)
    me.hook(me.mon.delpeerhook, me.delpeer)

    scr = G.ScrolledWindow()
    scr.set_policy(G.POLICY_AUTOMATIC, G.POLICY_AUTOMATIC)
    me.list = G.TreeView(me.listmodel)
    me.list.append_column(G.TreeViewColumn('Peer name',
                                           G.CellRendererText(),
                                           text = 0))
    me.list.append_column(G.TreeViewColumn('Address',
                                           G.CellRendererText(),
                                           text = 1))
    me.list.append_column(G.TreeViewColumn('T-ping',
                                           G.CellRendererText(),
                                           text = 2,
                                           foreground = 3))
    me.list.append_column(G.TreeViewColumn('E-ping',
                                           G.CellRendererText(),
                                           text = 4,
                                           foreground = 5))
    me.list.get_column(1).set_expand(True)
    me.list.connect('row-activated', me.activate)
    me.list.connect('button-press-event', me.buttonpress)
    me.list.set_reorderable(True)
    me.list.get_selection().set_mode(G.SELECTION_NONE)
    scr.add(me.list)
    vbox.pack_start(scr)

    vbox.pack_start(me.status, expand = False)
    me.hook(me.mon.connecthook, me.connected)
    me.hook(me.mon.disconnecthook, me.disconnected)
    me.hook(me.mon.notehook, me.notify)
    me.pinger = None
    me.set_default_size(420, 180)
    me.mon.connect()
    me.show_all()

  def addpeer(me, peer):
    peer.i = me.listmodel.append([peer.name, peer.addr,
                                  '???', 'green', '???', 'green'])
    peer.win = WindowSlot(lambda: PeerWindow(me.mon, peer))
    peer.pinghook = HookList()
    peer.ping = pingstate(n = 0, ngood = 0, nmiss = 0, nmissrun = 0,
                          tlast = 0, ttot = 0,
                          tcol = 2, ccol = 3, cmd = 'Transport pings')
    peer.eping = pingstate(n = 0, ngood = 0, nmiss = 0, nmissrun = 0,
                           tlast = 0, ttot = 0,
                           tcol = 4, ccol = 5, cmd = 'Encrypted pings')
  def delpeer(me, peer):
    me.listmodel.remove(peer.i)
  def path_peer(me, path):
    return me.mon.peers[me.listmodel[path][0]]

  def activate(me, l, path, col):
    peer = me.path_peer(path)
    peer.win.open()
  def buttonpress(me, l, ev):
    if ev.button == 3:
      r = me.list.get_path_at_pos(ev.x, ev.y)
      for i in '/peer-popup/kill-peer', '/peer-popup/force-kx':
        me.ui.get_widget(i).set_sensitive(me.mon.connectedp and
                                          r is not None)
      if r:
        me.menupeer = me.path_peer(r[0])
      else:
        me.menupeer = None
      me.ui.get_widget('/peer-popup').popup(None, None, None,
                                            ev.button, ev.time)

  def killpeer(me):
    me.mon.simplecmd('KILL %s' % me.menupeer.name)
  def forcekx(me):
    me.mon.simplecmd('FORCEKX %s' % me.menupeer.name)

  def reping(me):
    if me.pinger is not None:
      GO.source_remove(me.pinger)
    me.pinger = GO.timeout_add(10000, me.ping)
    me.ping()
  def unping(me):
    if me.pinger is not None:
      GO.source_remove(me.pinger)
      me.pinger = None
  def ping(me):
    for name in me.mon.peers:
      p = me.mon.peers[name]
      PingCommand(me.mon, 'PING', p, lambda p, t: me.pong(p, p.ping, t))
      PingCommand(me.mon, 'EPING', p, lambda p, t: me.pong(p, p.eping, t))
    return True
  def pong(me, p, ping, t):
    ping.n += 1
    if t is None:
      ping.nmiss += 1
      ping.nmissrun += 1
      me.listmodel[p.i][ping.tcol] = '(miss %d)' % ping.nmissrun
      me.listmodel[p.i][ping.ccol] = 'red'
    else:
      ping.ngood += 1
      ping.nmissrun = 0
      ping.tlast = t
      ping.ttot += t
      me.listmodel[p.i][ping.tcol] = '%.1f ms' % t
      me.listmodel[p.i][ping.ccol] = 'black'
    p.pinghook.run()
  def setstatus(me, status):
    me.status.pop(0)
    me.status.push(0, status)
  def notify(me, note, rest):
    if note == 'DAEMON':
      me.ui.get_widget('/menubar/server-menu/daemon').set_sensitive(False)
  def connected(me):
    me.setstatus('Connected (port %s)' % me.mon.simplecmd('PORT')[0])
    me.ui.get_widget('/menubar/server-menu/connect').set_sensitive(False)
    for i in ('/menubar/server-menu/disconnect',
              '/menubar/server-menu/server-version',
              '/menubar/server-menu/add-peer',
              '/menubar/server-menu/server-quit',
              '/menubar/logs-menu/trace-options'):
      me.ui.get_widget(i).set_sensitive(True)
    me.ui.get_widget('/menubar/server-menu/daemon'). \
      set_sensitive(parseinfo(me.mon.simplecmd('SERVINFO'))['daemon'] ==
                    'nil')
    me.reping()
  def disconnected(me):
    me.setstatus('Disconnected')
    me.ui.get_widget('/menubar/server-menu/connect').set_sensitive(True)
    for i in ('/menubar/server-menu/disconnect',
              '/menubar/server-menu/server-version',
              '/menubar/server-menu/add-peer',
              '/menubar/server-menu/daemon',
              '/menubar/server-menu/server-quit',
              '/menubar/logs-menu/trace-options'):
      me.ui.get_widget(i).set_sensitive(False)
    me.unping()
  def destroy(me):
    if me.pinger is not None:
      GO.source_remove(me.pinger)    
  def report(me, msg):
    moanbox(msg)
    return True

#----- Parse options --------------------------------------------------------

def version(fp = stdout):
  """Print the program's version number."""
  fp.write('%s, %s version %s\n' % (quis, PACKAGE, VERSION))

def usage(fp):
  """Print a brief usage message for the program."""
  fp.write('Usage: %s [-d DIR] [-a SOCK]\n' % quis)

def main():
  global tripedir
  if 'TRIPEDIR' in environ:
    tripedir = environ['TRIPEDIR']
  tripesock = '%s/%s' % (socketdir, 'tripesock')

  try:
    opts, args = O.getopt(argv[1:],
                          'hvud:a:',
                          ['help', 'version', 'usage',
                           'directory=', 'admin-socket='])
  except O.GetoptError, exc:
    moan(exc)
    usage(stderr)
    exit(1)
  for o, v in opts:
    if o in ('-h', '--help'):
      version(stdout)
      print
      usage(stdout)
      print """
Graphical monitor for TrIPE VPN.

Options supported:

-h, --help		Show this help message.
-v, --version		Show the version number.
-u, --usage		Show pointlessly short usage string.

-d, --directory=DIR	Use TrIPE directory DIR.
-a, --admin-socket=FILE	Select socket to connect to."""
      exit(0)
    elif o in ('-v', '--version'):
      version(stdout)
      exit(0)
    elif o in ('-u', '--usage'):
      usage(stdout)
      exit(0)
    elif o in ('-d', '--directory'):
      tripedir = v
    elif o in ('-a', '--admin-socket'):
      tripesock = v
    else:
      raise "can't happen!"
  if len(args) > 0:
    usage(stderr)
    exit(1)

  OS.chdir(tripedir)
  mon = Monitor(tripesock)
  root = MonitorWindow(mon)
  HookClient().hook(root.closehook, exit)
  G.main()

if __name__ == '__main__':
  main()

#----- That's all, folks ----------------------------------------------------