#!/usr/bin/env python
#
RCSID="$Id: selfcheck,v 1.2 2006/11/08 15:16:41 andreas Exp $"
# check internet connectivity
#

import os, sys, string, time, socket

PPPIF="pppoe0"
DBG=0

ADDR="204.29.161.33"
PORT=50003

def sendheartbeatmsg(tosend):
	iam=socket.gethostname()
	sock=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
	msgboot="msg=%s;service=%s;name=%s" % (tosend, "selfcheck", iam)
	sock.sendto(msgboot, (ADDR, PORT))
	time.sleep(1)
	sock.close()

class Pppoe:
  def __init__(self, interface):
	DBG=0
	self.interface=interface
	self.foundauthinfo=0

	fh=os.popen("/sbin/pppoectl %s" % self.interface,"r")
	while 1:
		l=fh.readline()
		if len(l) == 0:
			fh.close()
			break
		if DBG: print l[:-1]
		r=string.split(l[:-1])
		if DBG: print r
		if r[0] == self.interface+':':
			s=string.split(r[1],'=')
			self.phase=s[1]
		elif r[0][:11] == 'myauthproto':
			self.myauthproto=r[0][12:]
			self.myauthname=r[1][11:]
			self.foundauthinfo=1
		elif r[0] == 'lcp' and r[1] == 'timeout:':
			self.lcptimeount=r[2]
		elif r[0] == 'idle' and r[1] == 'timeout' and r[2] == "=":
			self.idletimeout=r[3]
		elif r[0] == 'max-auth-failure' and r[1] == '=':
			self.maxauthfailure=r[2]
		elif r[0] == 'max-noreceive' and r[1] == '=':
			self.maxnoreceive=string.join(r[2:], ' ')
		elif r[0] == 'max-alive-missed' and r[1] == '=':
			self.maxalivemissed = string.join(r[2:], ' ')
		
	fh=os.popen("/sbin/pppoectl -d %s" % self.interface,"r")
	while 1:
		l=fh.readline()
		if len(l) == 0:
			fh.close()
			break
		if DBG: print l[:-1]
		r=string.split(l[:-1])
		if DBG: print r
		if r[0] == self.interface+':':
			self.state=string.join(r[3:],' ')
		elif r[0] == 'Session' and r[1] == 'ID:':
			self.sessionid=r[2]
		elif r[0] == 'PADI' and r[1] == 'retries:':
			self.PADIretries=r[2]
		elif r[0] == 'PADR' and r[1] == 'retries:':
			self.PADRretries=r[2]
			

	fh=os.popen("/sbin/ifconfig %s" % self.interface,"r")
	if DBG: print fh
	self.foundinet=0
	while 1:
		l=fh.readline()
		if len(l) == 0:
			fh.close()
			break
		if DBG: print l[:-1]
		r=string.split(l[:-1])
		if DBG: print r
		if r[0] == self.interface+':':
			s=string.split(r[1],'=')
			s1=string.split(s[1],'<')
			self.flagshex=s1[0]
			self.flags=string.split(s1[1][:-1],',')
			self.mtu=r[3]
		elif r[0] == 'inet':
			self.foundinet=1
			self.ipaddr=r[1]
			self.ipgw=r[3]
			self.ipmask=r[5]
		

  def __repr__(self):
	r=[]
	keys=self.__dict__.keys()
	keys.sort()
	for k in keys:
		r.append("%-14s: %s" % (k, self.__dict__[k]))
	return string.join(r,'\n')
			

def notee():
	if not self.foundauthinfo:
		print"<B>PROBLEM: no login info configured, use \n'pppoectl %s myauthproto=pap myauthname=\"<account>\" myauthsecret=\"<password>\"'</B>"
		return

def checkall(IF):
	Res="The interface is"
	if "UP" in IF.flags:
		Res+=" up" 
	else:
		Res=".\n<B>PROBLEM:  the interface is down, use 'ifconfig %s up'</B>" % (PPPIF)
		return(Res)

	if IF.foundauthinfo:
		Res+=", has authentication information"
	else:
		Res+=".\n<B>PROBLEM: pppoe has no authentication information.</B>"
		return(Res)

	if IF.foundinet: 
		Res+=", is configured"
	else:
		Res+=".\n<B>PROBLEM:  %s is not configured, use 'ifconfig %s inet 0.0.0.0 0.0.0.1'</B>" % (PPPIF, PPPIF)
		return(Res)

	if IF.ipaddr != '0.0.0.0':
		Res+=", has an IP address"
	else:
		Res+=".\n<B>PROBLEM: The inteface has no address</B>" 
		return(Res)

	if IF.ipgw != '0.0.0.1':
		Res+=", has an IP gateway"
	else:
		Res+=".\n<B>PROBLEM: The interfaces has no gateway</B>" 
		return(Res)

#	ec=os.system("/sbin/ping -n -c 1 %s >/dev/null 2>&1" % "217.237.157.246")
	ec=os.system("/sbin/ping -n -c 1 %s >/dev/null 2>&1" % IF.ipgw)
	if ec == 0:
		Res+=".\nThe gateway is reachable."
	else:
		Res+=".\n<B>PROBLEM: The gateway is not reachable.</B>"
		return(Res)

	Res+=".\n\n<B>   All appears to be well.</B>"
	return(Res)



#
# Main
#

uname=os.uname()

lines=[]
if sys.stdin.isatty():
	uri='/selfcheck'
else:
	while 1:
		l2=sys.stdin.readline()
#		print "<pre>[",len(l2),l2[:-2],"]</pre>"
		sys.stdout.flush()
		if l2[:-2] == "":
			break
		lines.append(l2[:-2])
	uri=string.split(lines[0],' ')[1]
	if uri != '/favicon.ico':
		sendheartbeatmsg(uri)

date=time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime())


if uri != "/selfcheck":
	print "HTTP/1.1 404 Not Found"
	print "Date: %s" % date
	print "Connection: close"
	print "Content-Type: text/html; charset=iso-8859-1"
	print ""
	print "Nothing here, move along.."
	sys.exit(0)

print """HTTP/1.1 200 OK
Date: %s
Server: Selfcheck/1.0 (Python)
Last-Modified: %s
Accept-Ranges: bytes
Connection: close
Content-Type: text/html; charset=ISO-8859-1""" % (date, date)

print """
<html>
<head>
<title>ADSL Check</title>
</head>
<body>
<H2>ADSL Check</H2>
<pre>"""
print "Current Time:    %s" % date
print "Machine:         %s" % uname[1]
print "OS:              %s" % uname[0]+"/"+uname[4]+" "+uname[2]
print "Uptime:          ",
sys.stdout.flush()
os.system("uptime")

print "<br>"
print "<B>Checking interface %s</B>" % PPPIF

IF=Pppoe(PPPIF)

print checkall(IF)

print "<br>"
print "<B>Additional information</B>"

print "<BR><B>Users</B>"
sys.stdout.flush()
os.system("w")
print  "<br>"
print "<B>Interface data</B>"
print IF
print

print "<br>"
if 0:
	print "<B>Ping</B>"
	sys.stdout.flush()
	ec=os.system("/sbin/ping -n -q -c 3 204.29.161.37")
	if ec != 0:
		print "<B>     ping failed!</B>"
else:
	print "<B>Traceroute</B>"
	sys.stdout.flush()
#	ec=os.system("/usr/sbin/traceroute -w 2 204.29.161.37")
	ec=os.system("/usr/pkg/sbin/mtr -r -c 2 204.29.161.37")
	if ec != 0:
		print "<B>     traceroute failed!</B>"

print "<br>"
print "<B>Routing Table</B>"
sys.stdout.flush()
os.system("/usr/bin/netstat -rnLfinet")

print "<br>"
print "<B>Relevant log entries</B>"
sys.stdout.flush()
os.system("grep %s: /var/log/messages" % IF.interface)


if DBG:
	for l in lines:
		print l

print "</pre>"
print "All done"
print "</body>"
print "</html>"