[2] | 1 | #!/usr/bin/env python |
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[6] | 2 | # |
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[14] | 3 | # Copyright (C) 2002 |
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[6] | 4 | # |
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[14] | 5 | # This file is part of the pxeconfig utils |
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[6] | 6 | # |
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[14] | 7 | # This program is free software; you can redistribute it and/or modify it |
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| 8 | # under the terms of the GNU General Public License as published by the |
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| 9 | # Free Software Foundation; either version 2, or (at your option) any |
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| 10 | # later version. |
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[6] | 11 | # |
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[14] | 12 | # This program is distributed in the hope that it will be useful, |
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| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | # GNU General Public License for more details. |
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| 16 | # |
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| 17 | # You should have received a copy of the GNU General Public License |
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| 18 | # along with this program; if not, write to the Free Software |
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| 19 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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| 20 | # |
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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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| 28 | next boot it will use the default one. |
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| 29 | |
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| 30 | command line option: |
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| 31 | -d/--directory <dir> |
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| 32 | Where <dir> is the directory where the pxe config files reside. |
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[2] | 33 | |
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| 34 | Note: |
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| 35 | This server can ONLY be started from inetd. |
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| 36 | |
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| 37 | CVS info |
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[14] | 38 | $Date: 2002/08/15 06:36:47 $ |
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| 39 | $Revision: 1.5 $ |
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[2] | 40 | """ |
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| 41 | import time |
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| 42 | import socket |
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| 43 | import sys |
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| 44 | import os |
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| 45 | import string |
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| 46 | import syslog |
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[3] | 47 | import getopt |
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[2] | 48 | |
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| 49 | # DEBUG |
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| 50 | # |
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| 51 | DEBUG=1 |
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| 52 | |
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| 53 | # Some Global Constants |
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| 54 | # |
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| 55 | BUFSIZE=4096 |
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| 56 | STDIN=0 |
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| 57 | STDOUT=1 |
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[3] | 58 | SHORTOPT_LIST='d:' |
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| 59 | LONGOPT_LIST=['directory='] |
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[2] | 60 | |
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| 61 | PXE_CONF_DIR = '/tftpboot/pxelinux.cfg' |
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| 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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| 69 | def remove_link(filename): |
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| 70 | """This removes the pxe config filename for the host that is connected: |
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| 71 | filename : string |
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| 72 | """ |
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| 73 | |
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| 74 | file = os.path.join(PXE_CONF_DIR, filename) |
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| 75 | |
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| 76 | if DEBUG: |
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| 77 | print 'file = %s' %file |
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| 78 | |
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| 79 | if not os.path.exists(file): return |
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| 80 | |
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| 81 | if os.path.islink(file): |
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| 82 | try: |
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| 83 | os.unlink(file) |
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| 84 | syslog.openlog("pxeconfigd") |
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| 85 | syslog.syslog(syslog.LOG_INFO, file) |
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| 86 | syslog.closelog() |
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| 87 | except OSError: |
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| 88 | err_msg = "No permission at directory: %s" %PXE_CONF_DIR |
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| 89 | os.write(STDOUT, err_msg) |
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| 90 | sys.exit(1) |
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| 91 | |
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| 92 | # This function handles the client connection. It closes |
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| 93 | # the connection if there is no data |
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| 94 | # |
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| 95 | def handleConnection(): |
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| 96 | """Determines which host connects to the server |
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| 97 | """ |
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| 98 | |
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| 99 | # Determine client address |
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| 100 | # |
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| 101 | try: |
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| 102 | client_addr = socket.fromfd(sys.stdin.fileno(), socket.AF_INET, |
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| 103 | socket.SOCK_STREAM) |
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| 104 | client_ip = client_addr.getpeername()[0] |
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| 105 | |
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| 106 | except socket.error, detail: |
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| 107 | print "pxeconfigd can only be started from inetd!!!" |
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| 108 | sys.exit(1) |
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| 109 | |
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| 110 | |
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| 111 | # translate ip address ---> hex address |
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| 112 | # |
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| 113 | d = string.split(client_ip, '.') |
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| 114 | client_haddr = '%02X%02X%02X%02X' %(int(d[0]), int(d[1]), int(d[2]), int(d[3])) |
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| 115 | |
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| 116 | if DEBUG: |
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| 117 | print 'ip = %s, hex = %s' %(client_ip, client_haddr) |
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| 118 | |
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| 119 | remove_link(client_haddr) |
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| 120 | sys.exit(0) |
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| 121 | |
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[3] | 122 | def check_args(argv): |
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| 123 | """ |
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| 124 | Must we use another directory for the PXE configuration |
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| 125 | """ |
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[4] | 126 | global PXE_CONF_DIR |
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| 127 | |
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[3] | 128 | try: |
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| 129 | opts, args = getopt.getopt(argv[1:], SHORTOPT_LIST, LONGOPT_LIST) |
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| 130 | except getopt.error, detail: |
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| 131 | print __doc__ |
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| 132 | print detail |
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| 133 | sys.exit(1) |
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[2] | 134 | |
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[3] | 135 | if opts: |
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[4] | 136 | opt, PXE_CONF_DIR = opts[0] |
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[3] | 137 | |
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[2] | 138 | def server(): |
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| 139 | """Start the daemon |
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| 140 | """ |
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[3] | 141 | check_args(sys.argv) |
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[2] | 142 | |
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| 143 | if not os.path.isdir(PXE_CONF_DIR): |
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| 144 | os.write(STDOUT, "PXE booting is not configured") |
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| 145 | sys.exit(1) |
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| 146 | |
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| 147 | handleConnection() |
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| 148 | |
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| 149 | if __name__ == '__main__': |
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| 150 | server() |
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