[14] | 1 | # Copyright (C) 2002 |
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[6] | 2 | # |
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[14] | 3 | # This file is part of the pxeconfig utils |
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[6] | 4 | # |
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[14] | 5 | # This program is free software; you can redistribute it and/or modify it |
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| 6 | # under the terms of the GNU General Public License as published by the |
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| 7 | # Free Software Foundation; either version 2, or (at your option) any |
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| 8 | # later version. |
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[6] | 9 | # |
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[14] | 10 | # This program is distributed in the hope that it will be useful, |
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| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | # GNU General Public License for more details. |
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| 14 | # |
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| 15 | # You should have received a copy of the GNU General Public License |
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| 16 | # along with this program; if not, write to the Free Software |
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| 17 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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| 18 | # |
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[29] | 19 | # SVN info |
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| 20 | # $Id: pxeconfigd.py 206 2012-12-18 11:53:42Z bas $ |
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[2] | 21 | """ |
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| 22 | Author: Bas van der Vlies <basv@sara.nl> |
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| 23 | Date : 12 February 2002 |
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| 24 | Desc. : This script is used to control how a node is booted with PXE |
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[3] | 25 | enabled network cards. The node boots and fetch a pxe |
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| 26 | config file which tells how the node must boot. This daemon |
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| 27 | enables a client to remove his/here pxe config file. With the |
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[206] | 28 | next boot it will use the default one. |
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[3] | 29 | |
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[206] | 30 | command line option: |
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| 31 | -V/--version |
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| 32 | Prints the version number and exits |
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[2] | 33 | |
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| 34 | Note: |
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[206] | 35 | This server can ONLY be started from inetd/xinetd. |
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[2] | 36 | """ |
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| 37 | import time |
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| 38 | import socket |
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| 39 | import sys |
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| 40 | import os |
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| 41 | import string |
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| 42 | import syslog |
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[3] | 43 | import getopt |
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[2] | 44 | |
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[171] | 45 | # PXE modules |
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| 46 | from pxe_global import * |
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| 47 | |
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[2] | 48 | # DEBUG |
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| 49 | # |
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| 50 | DEBUG=1 |
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| 51 | |
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| 52 | # Some Global Constants |
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| 53 | # |
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| 54 | BUFSIZE=4096 |
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| 55 | STDIN=0 |
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| 56 | STDOUT=1 |
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[171] | 57 | SHORTOPT_LIST='V' |
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| 58 | LONGOPT_LIST=['version'] |
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[2] | 59 | |
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| 60 | PXE_CONF_DIR = '/tftpboot/pxelinux.cfg' |
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[206] | 61 | VERSION = '4.2.0' |
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[2] | 62 | |
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| 63 | # Give the current time |
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| 64 | # |
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| 65 | def now(): |
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| 66 | return time.ctime(time.time()) |
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| 67 | |
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| 68 | |
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[186] | 69 | def remove_link(ip, arp_cmd): |
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| 70 | """ |
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| 71 | This removes the pxe config filename for the host that is connected: |
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| 72 | ip : ip address of the client host |
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| 73 | arp_cmd : For Dynamic ips, look up the mac address via arp |
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| 74 | """ |
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[2] | 75 | |
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[186] | 76 | ## translate ip address ---> hex address |
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| 77 | # |
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| 78 | d = string.split(ip, '.') |
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| 79 | haddr = '%02X%02X%02X%02X' %(int(d[0]), int(d[1]), int(d[2]), int(d[3])) |
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[2] | 80 | |
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[186] | 81 | file = os.path.join(PXE_CONF_DIR, haddr) |
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[196] | 82 | if DEBUG: |
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| 83 | print file |
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[2] | 84 | |
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[186] | 85 | if not os.path.exists(file): |
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[2] | 86 | |
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[186] | 87 | ## |
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| 88 | # No ARP command set, just return |
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| 89 | # |
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| 90 | if not arp_cmd: |
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| 91 | return |
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[2] | 92 | |
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[186] | 93 | else: |
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| 94 | ## |
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| 95 | # arp -n 192.168.146.112 |
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| 96 | # Address HWtype HWaddress Flags Mask Iface |
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| 97 | # 192.168.146.112 ether 00:23:ae:fd:cf:74 C vlan133 |
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| 98 | |
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| 99 | cmd = '%s %s' %(arp_cmd, ip) |
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| 100 | lines = os.popen(cmd).readlines() |
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| 101 | for line in lines: |
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| 102 | if line.startswith(ip): |
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| 103 | t = line.split() |
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| 104 | mac_addr = t[2] |
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| 105 | haddr = '01-%s' %(mac_addr.replace(':', '-').lower()) |
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[196] | 106 | |
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[186] | 107 | file = os.path.join(PXE_CONF_DIR, haddr) |
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[196] | 108 | if DEBUG: |
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| 109 | print file |
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| 110 | |
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[186] | 111 | if not os.path.exists(file): |
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| 112 | return |
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| 113 | |
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| 114 | if DEBUG: |
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| 115 | print 'file = %s' %file |
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| 116 | |
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| 117 | if os.path.islink(file): |
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| 118 | try: |
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| 119 | os.unlink(file) |
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| 120 | syslog.openlog("pxeconfigd") |
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| 121 | syslog.syslog(syslog.LOG_INFO, file) |
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| 122 | syslog.closelog() |
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| 123 | except OSError: |
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| 124 | err_msg = "No permission at directory: %s" %PXE_CONF_DIR |
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| 125 | os.write(STDOUT, err_msg) |
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| 126 | sys.exit(1) |
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| 127 | |
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| 128 | |
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[2] | 129 | # This function handles the client connection. It closes |
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| 130 | # the connection if there is no data |
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| 131 | # |
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[171] | 132 | def handleConnection(settings): |
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| 133 | """ |
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| 134 | Determines which host connects to the server |
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| 135 | """ |
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| 136 | |
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| 137 | # Determine client address |
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| 138 | # |
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| 139 | try: |
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| 140 | client_addr = socket.fromfd(sys.stdin.fileno(), socket.AF_INET, |
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[2] | 141 | socket.SOCK_STREAM) |
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[171] | 142 | client_ip = client_addr.getpeername()[0] |
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| 143 | except socket.error, detail: |
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| 144 | error = "pxeconfigd can only be started from inetd!!!" |
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| 145 | raise PxeConfig, error |
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| 146 | |
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| 147 | |
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| 148 | if DEBUG: |
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[189] | 149 | print 'ip = %s' %(client_ip) |
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[2] | 150 | |
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[172] | 151 | try: |
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[171] | 152 | cmd = '%s %s' %(settings['daemon_script_hook'], client_ip) |
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| 153 | print cmd |
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| 154 | os.system(cmd) |
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[172] | 155 | except KeyError: |
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| 156 | pass |
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[2] | 157 | |
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[186] | 158 | try: |
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| 159 | arp_cmd = settings['arp_command'] |
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| 160 | except KeyError: |
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| 161 | arp_cmd = None |
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| 162 | |
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| 163 | remove_link(client_ip, arp_cmd) |
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[171] | 164 | sys.exit(0) |
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[2] | 165 | |
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[171] | 166 | def check_args(argv, settings): |
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| 167 | """ |
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| 168 | Must we use another directory for the PXE configuration |
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| 169 | """ |
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| 170 | global PXE_CONF_DIR |
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| 171 | |
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| 172 | try: |
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| 173 | opts, args = getopt.getopt(argv[1:], SHORTOPT_LIST, LONGOPT_LIST) |
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| 174 | except getopt.error, detail: |
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| 175 | print __doc__ |
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| 176 | print detail |
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| 177 | sys.exit(1) |
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| 178 | |
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| 179 | for opt, value in opts: |
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| 180 | if opt in ['-V', '--version']: |
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| 181 | print VERSION |
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| 182 | sys.exit(0) |
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[2] | 183 | |
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[171] | 184 | try: |
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| 185 | PXE_CONF_DIR = settings['pxe_config_dir'] |
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| 186 | except KeyError: |
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| 187 | pass |
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| 188 | |
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| 189 | PXE_CONF_DIR = os.path.realpath(PXE_CONF_DIR) |
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| 190 | if not os.path.isdir(PXE_CONF_DIR): |
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| 191 | error = 'pxeconfig directory: %s does not exists' %(PXE_CONF_DIR) |
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| 192 | raise PxeConfig, error |
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[2] | 193 | |
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| 194 | def server(): |
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| 195 | """Start the daemon |
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| 196 | """ |
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[186] | 197 | parser_config, default_settings = ReadConfig() |
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| 198 | check_args(sys.argv, default_settings) |
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| 199 | handleConnection(default_settings) |
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[2] | 200 | |
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| 201 | if __name__ == '__main__': |
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| 202 | server() |
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