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#
# network.py - network configuration install data
#
# Matt Wilson <ewt@redhat.com>
# Erik Troan <ewt@redhat.com>
# Mike Fulbright <msf@redhat.com>
#
# Copyright 2001 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# library public license.
#
# You should have received a copy of the GNU Library Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
from simpleconfig import SimpleConfigFile
import string
import isys
import socket
import os
from log import log
class NetworkDevice (SimpleConfigFile):
def __str__ (self):
s = ""
s = s + "DEVICE=" + self.info["DEVICE"] + "\n"
keys = self.info.keys ()
keys.sort ()
keys.remove ("DEVICE")
# Don't let onboot be turned on unless we have config information
# to go along with it
if self.get('bootproto') != 'dhcp' and not self.get('ipaddr'):
forceOffOnBoot = 1
else:
forceOffOnBoot = 0
onBootWritten = 0
for key in keys:
if key == 'ONBOOT' and forceOffOnBoot:
s = s + key + "=" + 'no' + "\n"
else:
s = s + key + "=" + self.info[key] + "\n"
if key == 'ONBOOT':
onBootWritten = 1
if not onBootWritten:
s = s + 'ONBOOT=no\n'
return s
def __init__ (self, dev):
self.info = { "DEVICE" : dev }
class Network:
def __init__ (self):
self.netdevices = {}
self.gateway = ""
self.primaryNS = ""
self.secondaryNS = ""
self.ternaryNS = ""
self.domains = []
self.readData = 0
self.isConfigured = 0
self.hostname = "localhost.localdomain"
try:
f = open ("/tmp/netinfo", "r")
except:
pass
else:
lines = f.readlines ()
f.close ()
info = {}
self.isConfigured = 1
for line in lines:
netinf = string.splitfields (line, '=')
info [netinf[0]] = string.strip (netinf[1])
self.netdevices [info["DEVICE"]] = NetworkDevice (info["DEVICE"])
if info.has_key ("IPADDR"):
self.netdevices [info["DEVICE"]].set (("IPADDR", info["IPADDR"]))
if info.has_key ("NETMASK"):
self.netdevices [info["DEVICE"]].set (("NETMASK", info["NETMASK"]))
if info.has_key ("BOOTPROTO"):
self.netdevices [info["DEVICE"]].set (("BOOTPROTO", info["BOOTPROTO"]))
if info.has_key ("ONBOOT"):
self.netdevices [info["DEVICE"]].set (("ONBOOT", info["ONBOOT"]))
if info.has_key ("GATEWAY"):
self.gateway = info["GATEWAY"]
if info.has_key ("DOMAIN"):
self.domains.append(info["DOMAIN"])
if info.has_key ("HOSTNAME"):
self.hostname = info["HOSTNAME"]
self.readData = 1
try:
f = open ("/etc/resolv.conf", "r")
except:
pass
else:
lines = f.readlines ()
f.close ()
for line in lines:
resolv = string.split (line)
if resolv and resolv[0] == 'nameserver':
if self.primaryNS == "":
self.primaryNS = resolv[1]
elif self.secondaryNS == "":
self.secondaryNS = resolv[1]
elif self.ternaryNS == "":
self.ternaryNS = resolv[1]
def getDevice(self, device):
return self.netdevices[device]
def available (self):
f = open ("/proc/net/dev")
lines = f.readlines()
f.close ()
# skip first two lines, they are header
lines = lines[2:]
for line in lines:
dev = string.strip (line[0:6])
if dev != "lo" and not self.netdevices.has_key (dev):
self.netdevices[dev] = NetworkDevice (dev)
return self.netdevices
def setHostname(self, hn):
self.hostname = hn
def lookupHostname (self):
# can't look things up if they don't exist!
if not self.hostname or self.hostname == "localhost.localdomain": return None
if not self.primaryNS: return
if not self.isConfigured:
for dev in self.netdevices.values():
if dev.get('bootproto') == "dhcp":
self.primaryNS = isys.pumpNetDevice(dev.get('device'))
self.isConfigured = 1
break
elif dev.get('ipaddr') and dev.get('netmask'):
try:
isys.configNetDevice(dev.get('device'),
dev.get('ipaddr'),
dev.get('netmask'),
self.gateway)
self.isConfigured = 1
break
except SystemError:
log ("failed to configure network device %s when "
"looking up host name", dev.get('device'))
if not self.isConfigured:
log ("no network devices were availabe to look up host name")
return None
f = open("/etc/resolv.conf", "w")
f.write("nameserver %s\n" % self.primaryNS)
f.close()
isys.resetResolv()
isys.setResolvRetry(2)
try:
ip = socket.gethostbyname(self.hostname)
except:
return None
return ip
def nameservers (self):
return [ self.primaryNS, self.secondaryNS, self.ternaryNS ]
def writeKS(self, f):
# XXX
#
# Hopefully the first one is the right one to use. We ought to support
# multiple "network" lines
#
# This doesn't write out nodns, ever.
#
devNames = self.netdevices.keys()
devNames.sort()
if len(devNames) == 0:
return
dev = self.netdevices[devNames[0]]
if dev.get('bootproto') == 'dhcp' or dev.get('ipaddr'):
f.write("network --device %s" % dev.get('device'))
if dev.get('bootproto') == 'dhcp':
f.write(" --bootproto dhcp")
else:
f.write(" --bootproto static --ip %s --netmask %s --gateway %s" %
(dev.get('ipaddr'), dev.get('netmask'), self.gateway))
if dev.get('nameserver'):
f.write(" --nameserver %s" % dev.get('nameserver'))
if self.hostname and self.hostname != "localhost.localdomain":
f.write(" --hostname %s" % dev.get('hostname'))
f.write("\n");
def write (self, instPath):
# /etc/sysconfig/network-scripts/ifcfg-*
for dev in self.netdevices.values ():
device = dev.get ("device")
fn = instPath + "/etc/sysconfig/network-scripts/ifcfg-" + device
f = open (fn, "w")
os.chmod(fn, 0600)
f.write (str (dev))
f.close ()
# /etc/sysconfig/network
f = open (instPath + "/etc/sysconfig/network", "w")
f.write ("NETWORKING=yes\n"
"HOSTNAME=")
# use instclass hostname if set (kickstart) to override
if self.hostname:
f.write(self.hostname + "\n")
else:
f.write("localhost.localdomain" + "\n")
if self.gateway:
f.write("GATEWAY=" + self.gateway + "\n")
f.close ()
# /etc/hosts
f = open (instPath + "/etc/hosts", "w")
localline = "127.0.0.1\t\t"
log ("self.hostname = %s", self.hostname)
ip = self.lookupHostname()
# If the hostname is not resolvable, tie it to 127.0.0.1
if not ip and self.hostname != "localhost.localdomain":
localline = localline + self.hostname + " "
l = string.split(self.hostname, ".")
if len(l) > 1:
localline = localline + l[0] + " "
localline = localline + "localhost.localdomain localhost\n"
f.write("# Do not remove the following line, or various programs\n")
f.write("# that require network functionality will fail.\n")
f.write (localline)
if ip:
f.write ("%s\t\t%s\n" % (ip, self.hostname))
# If the hostname was not looked up, but typed in by the user,
# domain might not be computed, so do it now.
if self.domains == [ "localdomain" ] or not self.domains:
if '.' in self.hostname:
# chop off everything before the leading '.'
domain = self.hostname[(string.find(self.hostname, '.') + 1):]
self.domains = [ domain ]
# /etc/resolv.conf
f = open (instPath + "/etc/resolv.conf", "w")
if self.domains != [ 'localdomain' ] and self.domains:
f.write ("search " + string.joinfields (self.domains, ' ')
+ "\n")
for ns in self.nameservers ():
if ns:
f.write ("nameserver " + ns + "\n")
f.close ()
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