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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>
# Brent Fox <bfox@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
def networkDeviceCheck(network, dispatch):
devs = network.available()
if not devs:
dispatch.skipStep("network")
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.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"])
# XXX is REMIP ever used?
for key in ("IPADDR", "NETMASK", "BOOTPROTO", "ONBOOT", "REMIP"):
if info.has_key(key):
self.netdevices [info["DEVICE"]].set((key, info[key]))
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"]
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(1)
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 self.primaryNS:
f.write(" --nameserver %s" % self.primaryNS)
if self.hostname and self.hostname != "localhost.localdomain":
f.write(" --hostname %s" % self.hostname)
f.write("\n");
def write(self, instPath):
# /etc/sysconfig/network-scripts/ifcfg-*
for dev in self.netdevices.values():
device = dev.get("device")
fn = "%s/etc/sysconfig/network-scripts/ifcfg-%s" % (instPath,
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=%s\n" % (self.gateway,))
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 %s\n" % (string.joinfields(self.domains, ' '),))
for ns in self.nameservers():
if ns:
f.write("nameserver %s\n" % (ns,))
f.close()
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