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#!/usr/bin/python

# The Following agent has been tested on:
# - Eaton ePDU Managed - SNMP v1
# - Eaton ePDU Switched - SNMP v1

import sys, re, pexpect
sys.path.append("/usr/share/fence")
from fencing import *
from fencing_snmp import *

#BEGIN_VERSION_GENERATION
RELEASE_VERSION="3.1.5"
BUILD_DATE="(built Mon Feb 6 23:36:21 UTC 2012)"
REDHAT_COPYRIGHT="Copyright (C) Red Hat, Inc. 2004-2010 All rights reserved."
#END_VERSION_GENERATION

### CONSTANTS ###
# oid defining fence device
OID_SYS_OBJECT_ID='.1.3.6.1.2.1.1.2.0'

### GLOBAL VARIABLES ###
# Device - see EatonManagedePDU, EatonSwitchedePDU
device=None

# Port ID
port_id=None
# Switch ID
switch_id=None

# Did we issue a set before get (to adjust OID with Switched ePDU)
after_set=False

# Classes describing Device params
# Managed ePDU
class EatonManagedePDU:
	status_oid=      '.1.3.6.1.4.1.534.6.6.6.1.2.2.1.3.%d'
	control_oid=     '.1.3.6.1.4.1.534.6.6.6.1.2.2.1.3.%d'
	outlet_table_oid='.1.3.6.1.4.1.534.6.6.6.1.2.2.1.1'
	ident_str="Eaton Managed ePDU"
	state_off=0
	state_on=1
	state_cycling=2	# FIXME: not usable with fence-agents
	turn_off=0
	turn_on=1
	turn_cycle=2	# FIXME: not usable with fence-agents
	has_switches=False

# Switched ePDU (Pulizzi 2)
# NOTE: sysOID reports "20677.1", while data are actually at "20677.2"
class EatonSwitchedePDU:
	status_oid=      '.1.3.6.1.4.1.20677.2.6.3.%d.0'
	control_oid=     '.1.3.6.1.4.1.20677.2.6.2.%d.0'
	outlet_table_oid='.1.3.6.1.4.1.20677.2.6.3'
	ident_str="Eaton Switched ePDU"
	state_off=2
	state_on=1
	state_cycling=0 # Note: this status doesn't exist on this device
	turn_off=2
	turn_on=1
	turn_cycle=3	# FIXME: not usable with fence-agents
	has_switches=False

### FUNCTIONS ###
def eaton_set_device(conn,options):
	global device

	agents_dir={'.1.3.6.1.4.1.534.6.6.6':EatonManagedePDU,
				'.1.3.6.1.4.1.20677.1':EatonSwitchedePDU,
				'.1.3.6.1.4.1.20677.2':EatonSwitchedePDU }

	# First resolve type of Eaton
	eaton_type=conn.walk(OID_SYS_OBJECT_ID)

	if (not ((len(eaton_type)==1) and (agents_dir.has_key(eaton_type[0][1])))):
		eaton_type=[[None,None]]

	device=agents_dir[eaton_type[0][1]]

	conn.log_command("Trying %s"%(device.ident_str))

def eaton_resolv_port_id(conn,options):
	global port_id,switch_id,device

	if (device==None):
		eaton_set_device(conn,options)

	# Restore the increment, that was removed in main for ePDU Managed
	if (device.ident_str == "Eaton Switched ePDU"):
		options["-n"] = str(int(options["-n"]) + 1)

	# Now we resolv port_id/switch_id
	if ((options["-n"].isdigit()) and ((not device.has_switches) or (options["-s"].isdigit()))):
		port_id=int(options["-n"])

		if (device.has_switches):
			switch_id=int(options["-s"])
	else:
		table=conn.walk(device.outlet_table_oid,30)

		for x in table:
			if (x[1].strip('"')==options["-n"]):
				t=x[0].split('.')
				if (device.has_switches):
					port_id=int(t[len(t)-1])
					switch_id=int(t[len(t)-3])
				else:
					if (device.ident_str == "Eaton Switched ePDU"):
						port_id=int(t[len(t)-3])
					else:
						port_id=int(t[len(t)-1])

	if (port_id==None):
		# Restore index offset, to provide a valid error output on Managed ePDU
		if (device.ident_str != "Eaton Switched ePDU"):
			options["-n"] = str(int(options["-n"]) + 1)
		fail_usage("Can't find port with name %s!"%(options["-n"]))

def get_power_status(conn,options):
	global port_id,switch_id,device,after_set

	if (port_id==None):
		eaton_resolv_port_id(conn,options)

	# Ajust OID for Switched ePDU when the get is after a set
	if ((after_set == True) and (device.ident_str == "Eaton Switched ePDU")):
		port_id-=1
		after_set=False

	oid=((device.has_switches) and device.status_oid%(switch_id,port_id) or device.status_oid%(port_id))

	try:
		(oid,status)=conn.get(oid)
		if (status==str(device.state_on)):
			return "on"
		elif (status==str(device.state_off)):
			return "off"
		else:
			return None
	except:
		return None

def set_power_status(conn, options):
	global port_id,switch_id,device,after_set

	after_set = True

	if (port_id==None):
		eaton_resolv_port_id(conn,options)

	# Controls start at #2 on Switched ePDU, since #1 is the global command
	if (device.ident_str == "Eaton Switched ePDU"):
		port_id=int(port_id)+1

	oid=((device.has_switches) and device.control_oid%(switch_id,port_id) or device.control_oid%(port_id))

	conn.set(oid,(options["-o"]=="on" and device.turn_on or device.turn_off))


def get_outlets_status(conn, options):
	global device

	outletCount = 0
	result={}

	if (device==None):
		eaton_set_device(conn,options)

	res_ports=conn.walk(device.outlet_table_oid,30)

	for x in res_ports:
		outletCount+=1
		status=x[1]
		t=x[0].split('.')

		# Plug indexing start from zero, so we substract '1' from the
		# user's given plug number
		if (device.ident_str == "Eaton Managed ePDU"):
			port_num=str(int(((device.has_switches) and "%s:%s"%(t[len(t)-3],t[len(t)-1]) or "%s"%(t[len(t)-1]))) + 1)

			# Plug indexing start from zero, so we add '1'
			# for the user's exposed plug number
			port_name=str(int(x[1].strip('"')) + 1)
			port_status=""
			result[port_num]=(port_name,port_status)
		else:
			# Switched ePDU do not propose an outletCount OID!
			# Invalid status (ie value == '0'), retrieved via the walk,
			# means the outlet is absent
			port_num=str(outletCount)
			port_name=str(outletCount)
			port_status=""
			if (status != '0'):
				result[port_num]=(port_name,port_status)

	return result

# Define new options
def eaton_snmp_define_defaults():
	all_opt["snmp_version"]["default"]="1"
	all_opt["community"]["default"]="private"

# Main agent method
def main():
	device_opt = [ "help", "version", "agent", "quiet", "verbose", "debug",
		       "action", "ipaddr", "login", "passwd", "passwd_script",
		       "test", "port", "separator", "no_login", "no_password",
		       "snmp_version", "community", "snmp_auth_prot", "snmp_sec_level",
		       "snmp_priv_prot", "snmp_priv_passwd", "snmp_priv_passwd_script",
		       "udpport","inet4_only","inet6_only",
		       "power_timeout", "shell_timeout", "login_timeout", "power_wait" ]

	atexit.register(atexit_handler)

	snmp_define_defaults ()
	eaton_snmp_define_defaults()

	options=check_input(device_opt,process_input(device_opt))

	## Support for -n [switch]:[plug] notation that was used before
	if ((options.has_key("-n")) and (-1 != options["-n"].find(":"))):
		(switch, plug) = options["-n"].split(":", 1)
		if ((switch.isdigit()) and (plug.isdigit())):
		        options["-s"] = switch
			options["-n"] = plug

	if (not (options.has_key("-s"))):
		options["-s"]="1"

	# Plug indexing start from zero on ePDU Managed, so we substract '1' from
	# the user's given plug number.
	# For Switched ePDU, we will add this back again later.
	if ((options.has_key("-n")) and (options["-n"].isdigit())):
		options["-n"] = str(int(options["-n"]) - 1)

	docs = { }
	docs["shortdesc"] = "Fence agent for Eaton over SNMP"
	docs["longdesc"] = "fence_eaton_snmp is an I/O Fencing agent \
which can be used with the Eaton network power switch. It logs \
into a device via SNMP and reboots a specified outlet. It supports \
SNMP v1 and v3 with all combinations of  authenticity/privacy settings."
	docs["vendorurl"] = "http://powerquality.eaton.com"
	show_docs(options, docs)

	# Operate the fencing device
	result = fence_action(FencingSnmp(options), options, set_power_status, get_power_status, get_outlets_status)

	sys.exit(result)
if __name__ == "__main__":
	main()