# # network.py - network configuration install data # # Matt Wilson # Erik Troan # Mike Fulbright # Brent Fox # # 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.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"]) # 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"] 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(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()