def fetch_next_ip(self,hosttype_id):
"""
Fetch the first available ip address for a hosttype. The ip range
is defined in skolesys.conf and the ip addresses already assigned
are read in the ldap database
"""
if hosttype_id == hostdef.hosttype_as_id('mainserver'):
return conf.get('DOMAIN','mainserver_ip')
hosttype_text = hostdef.hosttype_as_text(hosttype_id)
if not hosttype_text:
return None
iprange_str = conf.get('DOMAIN','%s_iprange' % hosttype_text)
if not iprange_str:
return None
# Parse the iprange string
c = re.compile('^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\s*(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$')
m = c.match(iprange_str.strip())
if m:
ipstart = hostdef.iptoint('.'.join(m.groups()[:4]))
ipend = hostdef.iptoint('.'.join(m.groups()[4:]))
# Get already assigned ip addresses
hostspath = "%s,%s" % (conf.get('LDAPSERVER','hosts_ou'),conf.get('LDAPSERVER','basedn'))
res = self.l.search(hostspath,\
ldap.SCOPE_ONELEVEL,'(objectclass=skoleSysHost)',['ipHostNumber'])
sres = self.l.result(res)
already_assigned = []
for hidx in xrange(len(sres[1])):
ipint = hostdef.iptoint(sres[1][hidx][1]['ipHostNumber'][0])
if ipint!=None:
already_assigned += [ipint]
newip = None
for tryip in range(ipstart,ipend+1):
if already_assigned.count(tryip):
continue
newip = tryip
break
if newip:
return hostdef.inttoip(newip)
return None
def conf_info(self):
"""
Read skolesys.conf and populate the member info dictionary. Many of
the conf values are elabourated before they are stored in the dictionary.
ie. subnets are registered with the following format in skolesys.conf:
ltspserver_subnet = 192.168.0.0/16
but this method expands that information to:
ltspserver_subnet 192.168.0.0
ltspserver_subnet_short 192.168
ltspserver_subnetmask 255.255.0.0
This kind of post elabouration is nessecary so cheetah can reach the right
data when needed.
"""
from skolesys.lib.conf import conf
# conf data
self.data['conf'] = {}
sections = conf.sections()
for sec in sections:
s = sec.lower()
self.data['conf'][s] = {}
for var,val in conf.items(sec):
self.data['conf'][s][var.lower()] = val
# TODO - There is to be made skolesys.conf sanity checker build into
# TODO - skolesys.lib.conf. That way the user can be presented with a
# TODO - configuration invalidity like missing mandetory variables:
# Mainserver
subnet_str = self.data['conf']['domain']['mainserver_subnet']
res = hostdef.check_subnet(subnet_str)
if not res:
return -1
subnet,subnetmask = res
subnetmask_int = (2**32-1) - (2**(32-int(subnetmask))-1)
subnet_int = hostdef.iptoint(subnet)
subnetmask_address = '%d.%d.%d.%d' % ((subnetmask_int>>24)&255,(subnetmask_int>>16)&255,(subnetmask_int>>8)&255,subnetmask_int&255)
self.data['conf']['domain']['mainserver_subnet'] = subnet
self.data['conf']['domain']['mainserver_subnetmask'] = subnetmask_address
subnet_short = ()
bit_shifter = 24
for ip_part in xrange(int(ceil(float(subnetmask)/8))):
subnet_short += (str((subnet_int>>bit_shifter) & ((subnetmask_int>>bit_shifter) & 255)),)
bit_shifter -= 8
self.data['conf']['domain']['mainserver_subnet_short'] = '.'.join(subnet_short)
# LTSP servers
subnet_str = self.data['conf']['domain']['ltspserver_subnet']
res = hostdef.check_subnet(subnet_str)
if not res:
return -2
subnet,subnetmask = res
subnetmask_int = (2**32-1) - (2**(32-int(subnetmask))-1)
subnet_int = hostdef.iptoint(subnet)
subnetmask_address = '%d.%d.%d.%d' % ((subnetmask_int>>24)&255,(subnetmask_int>>16)&255,(subnetmask_int>>8)&255,subnetmask_int&255)
self.data['conf']['domain']['ltspserver_subnet'] = subnet
self.data['conf']['domain']['ltspserver_subnetmask'] = subnetmask_address
subnet_short = ()
bit_shifter = 24
for ip_part in xrange(int(ceil(float(subnetmask)/8))):
subnet_short += (str((subnet_int>>bit_shifter) & ((subnetmask_int>>bit_shifter) & 255)),)
bit_shifter -= 8
self.data['conf']['domain']['ltspserver_subnet_short'] = '.'.join(subnet_short)