# # network.py - network configuration install data # # Matt Wilson # Erik Troan # Mike Fulbright # Brent Fox # # Copyright 2001-2002 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. # import string import isys import socket import os import re from rhpl.log import log from rhpl.translate import _, N_ from rhpl.simpleconfig import SimpleConfigFile def inStrRange(v, s): if string.find(s, v) == -1: return 0 else: return 1 def sanityCheckHostname(hostname): if len(hostname) < 1: return None if not inStrRange(hostname[0], string.ascii_letters): return _("Hostname must start with a valid character in the range " "'a-z' or 'A-Z'") for i in range(1, len(hostname)): if not inStrRange(hostname[i], string.ascii_letters+string.digits+".-"): return _("Hostnames can only contain the characters 'a-z', 'A-Z', '-', or '.'") return None def networkDeviceCheck(network, dispatch): devs = network.available() if not devs: dispatch.skipStep("network") # return if the device is of a type that requires a ptpaddr to be specified def isPtpDev(devname): if (devname.startswith("ctc") or devname.startswith("escon") or devname.startswith("iucv")): return 1 return 0 # determine whether any active at boot devices are using dhcp def anyUsingDHCP(devices): for dev in devices.keys(): bootproto = devices[dev].get("bootproto") if bootproto and bootproto == "dhcp": onboot = devices[dev].get("onboot") if onboot and onboot != "no": return 1 return 0 # sanity check an IP string. if valid, returns octets, if invalid, return None def sanityCheckIPString(ip_string): ip_re = re.compile('^([0-2]?[0-9]?[0-9])\\.([0-2]?[0-9]?[0-9])\\.([0-2]?[0-9]?[0-9])\\.([0-2]?[0-9]?[0-9])$') #Sanity check the string m = ip_re.match (ip_string) try: if not m: return None octets = m.groups() if len(octets) != 4: return None for octet in octets: if (int(octet) < 0) or (int(octet) > 255): return None except TypeError: return None return octets 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, "ONBOOT": "no" } class Network: def __init__(self): self.netdevices = {} self.gateway = "" self.primaryNS = "" self.secondaryNS = "" self.ternaryNS = "" self.domains = [] self.isConfigured = 0 self.hostname = "localhost.localdomain" # this is only currently used in GUI # elsewhere we test if the hostname is localhost.localdomain # to see if its been override. Need some consolidation in future. self.overrideDHCPhostname = 0 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"]) for key in ("IPADDR", "NETMASK", "BOOTPROTO", "ONBOOT", "MTU", "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 setDNS(self, ns): dns = ns.split(',') if len(dns) >= 1: self.primaryNS = dns[0] if len(dns) >= 2: self.secondaryNS = dns[1] if len(dns) >= 3: self.ternaryNS = dns[2] def setGateway(self, gw): self.gateway = gw 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') and self.gateway is not None: 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 available 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 dnsString(self): str = "" for ns in self.nameservers(): if not ns: continue if str: str = str + "," str = str + ns return str def writeKS(self, f): devNames = self.netdevices.keys() devNames.sort() if len(devNames) == 0: return for devName in devNames: dev = self.netdevices[devName] 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") if self.overrideDHCPhostname: if (self.hostname and self.hostname != "localhost.localdomain"): f.write(" --hostname %s" % self.hostname) else: f.write(" --bootproto static --ip %s --netmask %s" % (dev.get('ipaddr'), dev.get('netmask'))) if self.gateway is not None: f.write(" --gateway %s" % (self.gateway,)) if self.dnsString(): f.write(" --nameserver %s" % (self.dnsString(),)) 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, 0644) 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()