| 1 | #!/usr/bin/env python
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| 2 | #
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| 3 | # vim:ts=2:et:sw=2:ai
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| 4 | # Wireless Leiden configuration generator, based on yaml files'
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| 5 | # Rick van der Zwet <info@rickvanderzwet.nl>
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| 6 | import cgi
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| 7 | import cgitb
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| 8 | import copy
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| 9 | import glob
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| 10 | import os
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| 11 | import socket
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| 12 | import string
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| 13 | import subprocess
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| 14 | import sys
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| 15 | import time
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| 16 | import yaml
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| 17 |
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| 18 | NODE_DIR = os.path.dirname(os.path.realpath(__file__))
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| 19 | __version__ = '$Id: gformat.py 8298 2010-08-10 13:58:59Z rick $'
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| 20 |
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| 21 |
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| 22 | files = [
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| 23 | 'authorized_keys',
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| 24 | 'dnsmasq.conf',
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| 25 | 'rc.conf.local',
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| 26 | 'resolv.conf',
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| 27 | 'wleiden.yaml'
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| 28 | ]
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| 29 |
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| 30 |
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| 31 |
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| 32 | def get_proxylist():
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| 33 | """Get all available proxies proxyX sorting based on X number"""
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| 34 | os.chdir(NODE_DIR)
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| 35 | proxylist = sorted(glob.glob("proxy*"),
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| 36 | key=lambda name: int(''.join([c for c in name if c in string.digits])),
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| 37 | cmp=lambda x,y: x - y)
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| 38 | return proxylist
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| 39 |
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| 40 |
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| 41 |
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| 42 | def get_nodelist():
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| 43 | """ Get all available nodes - sorted """
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| 44 | os.chdir(NODE_DIR)
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| 45 | nodelist = sorted(glob.glob("CNode*"))
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| 46 | return nodelist
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| 47 |
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| 48 | def get_hostlist():
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| 49 | """ Combined hosts and proxy list"""
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| 50 | return get_nodelist() + get_proxylist()
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| 51 |
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| 52 |
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| 53 | def generate_title(nodelist):
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| 54 | """ Main overview page """
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| 55 | items = {'root' : "." }
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| 56 | output = """
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| 57 | <html>
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| 58 | <head>
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| 59 | <title>Wireless leiden Configurator - GFormat</title>
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| 60 | <style type="text/css">
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| 61 | th {background-color: #999999}
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| 62 | tr:nth-child(odd) {background-color: #cccccc}
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| 63 | tr:nth-child(even) {background-color: #ffffff}
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| 64 | th, td {padding: 0.1em 1em}
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| 65 | </style>
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| 66 | </head>
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| 67 | <body>
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| 68 | <center>
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| 69 | <form type="GET" action="%(root)s">
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| 70 | <input type="hidden" name="action" value="update">
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| 71 | <input type="submit" value="Update Configuration Database (SVN)">
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| 72 | </form>
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| 73 | <table>
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| 74 | <caption><h3>Wireless Leiden Configurator</h3></caption>
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| 75 | """ % items
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| 76 |
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| 77 | for node in nodelist:
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| 78 | items['node'] = node
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| 79 | output += '<tr><td><a href="%(root)s/%(node)s">%(node)s</a></td>' % items
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| 80 | for config in files:
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| 81 | items['config'] = config
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| 82 | output += '<td><a href="%(root)s/%(node)s/%(config)s">%(config)s</a></td>' % items
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| 83 | output += "</tr>"
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| 84 | output += """
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| 85 | </table>
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| 86 | <hr />
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| 87 | <em>%s</em>
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| 88 | </center>
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| 89 | </body>
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| 90 | </html>
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| 91 | """ % __version__
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| 92 |
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| 93 | return output
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| 94 |
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| 95 |
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| 96 |
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| 97 | def generate_node(node):
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| 98 | """ Print overview of all files available for node """
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| 99 | return "\n".join(files)
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| 100 |
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| 101 |
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| 102 |
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| 103 | def generate_header(ctag="#"):
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| 104 | return """\
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| 105 | %(ctag)s
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| 106 | %(ctag)s DO NOT EDIT - Automatically generated by 'gformat'
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| 107 | %(ctag)s Generated at %(date)s by %(host)s
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| 108 | %(ctag)s
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| 109 | """ % { 'ctag' : ctag, 'date' : time.ctime(), 'host' : socket.gethostname() }
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| 110 |
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| 111 |
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| 112 |
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| 113 | def parseaddr(s):
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| 114 | """ Process IPv4 CIDR notation addr to a (binary) number """
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| 115 | f = s.split('.')
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| 116 | return (long(f[0]) << 24L) + \
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| 117 | (long(f[1]) << 16L) + \
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| 118 | (long(f[2]) << 8L) + \
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| 119 | long(f[3])
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| 120 |
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| 121 |
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| 122 |
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| 123 | def showaddr(a):
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| 124 | """ Display IPv4 addr in (dotted) CIDR notation """
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| 125 | return "%d.%d.%d.%d" % ((a >> 24) & 0xff, (a >> 16) & 0xff, (a >> 8) & 0xff, a & 0xff)
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| 126 |
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| 127 |
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| 128 |
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| 129 | def netmask2subnet(netmask):
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| 130 | """ Given a 'netmask' return corresponding CIDR """
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| 131 | return showaddr(0xffffffff & (0xffffffff << (32 - int(netmask))))
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| 132 |
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| 133 |
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| 134 |
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| 135 | def generate_dnsmasq_conf(datadump):
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| 136 | """ Generate configuration file '/usr/local/etc/dnsmasq.conf' """
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| 137 | output = generate_header()
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| 138 | output += """\
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| 139 | # DHCP server options
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| 140 | dhcp-authoritative
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| 141 | dhcp-fqdn
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| 142 | domain=dhcp.%(nodename_lower)s.%(domain)s
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| 143 | domain-needed
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| 144 | expand-hosts
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| 145 |
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| 146 | # Low memory footprint
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| 147 | cache-size=10000
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| 148 | \n""" % datadump
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| 149 |
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| 150 | for iface_key in datadump['iface_keys']:
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| 151 | if not datadump[iface_key].has_key('comment'):
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| 152 | datadump[iface_key]['comment'] = None
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| 153 | output += "## %(interface)s - %(desc)s - %(comment)s\n" % datadump[iface_key]
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| 154 |
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| 155 | try:
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| 156 | (dhcp_start, dhcp_stop) = datadump[iface_key]['dhcp'].split('-')
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| 157 | (ip, netmask) = datadump[iface_key]['ip'].split('/')
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| 158 | datadump[iface_key]['subnet'] = netmask2subnet(netmask)
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| 159 | except (AttributeError, ValueError):
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| 160 | output += "# not autoritive\n\n"
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| 161 | continue
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| 162 |
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| 163 | dhcp_part = ".".join(ip.split('.')[0:3])
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| 164 | datadump[iface_key]['dhcp_start'] = dhcp_part + "." + dhcp_start
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| 165 | datadump[iface_key]['dhcp_stop'] = dhcp_part + "." + dhcp_stop
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| 166 | output += "dhcp-range=%(interface)s,%(dhcp_start)s,%(dhcp_stop)s,%(subnet)s,24h\n\n" % datadump[iface_key]
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| 167 |
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| 168 | return output
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| 169 |
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| 170 |
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| 171 |
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| 172 | def generate_rc_conf_local(datadump):
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| 173 | """ Generate configuration file '/etc/rc.conf.local' """
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| 174 | output = generate_header("#");
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| 175 | output += """\
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| 176 | hostname='%(nodetype)s%(nodename)s.%(domain)s'
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| 177 | location='%(location)s'
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| 178 | """ % datadump
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| 179 |
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| 180 | # TProxy configuration
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| 181 | output += "\n"
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| 182 | try:
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| 183 | if datadump['tproxy']:
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| 184 | output += """\
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| 185 | tproxy_enable='YES'
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| 186 | tproxy_range='%(tproxy)s'
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| 187 | """ % datadump
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| 188 | except KeyError:
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| 189 | output += "tproxy_enable='NO'\n"
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| 190 |
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| 191 | output += '\n'
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| 192 | # lo0 configuration:
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| 193 | # - 172.32.255.1/32 is the proxy.wleiden.net deflector
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| 194 | # - masterip is special as it needs to be assigned to at
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| 195 | # least one interface, so if not used assign to lo0
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| 196 | addrs_list = { 'lo0' : ["127.0.0.1/8", "172.31.255.1/32"] }
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| 197 | iface_map = {'lo0' : 'lo0'}
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| 198 |
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| 199 | masterip_used = False
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| 200 | for iface_key in datadump['iface_keys']:
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| 201 | if datadump[iface_key]['ip'].startswith(datadump['masterip']):
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| 202 | masterip_used = True
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| 203 | break
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| 204 | if not masterip_used:
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| 205 | addrs_list['lo0'].append(datadump['masterip'] + "/32")
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| 206 |
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| 207 | wlan_count = 0
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| 208 | for iface_key in datadump['iface_keys']:
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| 209 | ifacedump = datadump[iface_key]
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| 210 | interface = ifacedump['interface']
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| 211 | # By default no special interface mapping
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| 212 | iface_map[interface] = interface
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| 213 |
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| 214 | # Add interface IP to list
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| 215 | if addrs_list.has_key(interface):
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| 216 | addrs_list[interface].append(ifacedump['ip'])
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| 217 | else:
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| 218 | addrs_list[interface] = [ifacedump['ip']]
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| 219 |
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| 220 | # Alias only needs IP assignment for now, this might change if we
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| 221 | # are going to use virtual accesspoints
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| 222 | if "alias" in iface_key:
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| 223 | continue
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| 224 |
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| 225 | # XXX: Might want to deduct type directly from interface name
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| 226 | if ifacedump['type'] in ['11a', '11b', '11g', 'wireless']:
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| 227 | # Create wlanX interface
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| 228 | ifacedump['wlanif'] ="wlan%i" % wlan_count
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| 229 | iface_map[interface] = ifacedump['wlanif']
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| 230 | wlan_count += 1
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| 231 |
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| 232 | # Default to station (client) mode
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| 233 | ifacedump['wlanmode'] = "sta"
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| 234 | if ifacedump['mode'] in ['master', 'master-wds']:
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| 235 | ifacedump['wlanmode'] = "ap"
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| 236 | # Default to 802.11b mode
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| 237 | ifacedump['mode'] = '11b'
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| 238 | if ifacedump['type'] in ['11a', '11b' '11g']:
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| 239 | ifacedump['mode'] = ifacedump['type']
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| 240 |
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| 241 | if not ifacedump.has_key('channel'):
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| 242 | if ifacedump['type'] == '11a':
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| 243 | ifacedump['channel'] = 36
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| 244 | else:
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| 245 | ifacedump['channel'] = 1
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| 246 |
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| 247 | # Allow special hacks at the back like wds and stuff
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| 248 | if not ifacedump.has_key('extra'):
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| 249 | ifacedump['extra'] = 'regdomain ETSI country NL'
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| 250 |
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| 251 | output += "wlans_%(interface)s='%(wlanif)s'\n" % ifacedump
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| 252 | output += ("create_args_%(wlanif)s='wlanmode %(wlanmode)s mode " +\
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| 253 | "%(mode)s ssid %(ssid)s %(extra)s channel %(channel)s'\n") % ifacedump
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| 254 |
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| 255 | elif ifacedump['type'] in ['ethernet', 'eth']:
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| 256 | # No special config needed besides IP
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| 257 | pass
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| 258 | else:
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| 259 | assert False, "Unknown type " + ifacedump['type']
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| 260 |
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| 261 | # Print IP address which needs to be assigned over here
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| 262 | output += "\n"
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| 263 | for iface,addrs in sorted(addrs_list.iteritems()):
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| 264 | output += "ipv4_addrs_%s='%s'\n" % (iface_map[iface], " ".join(addrs))
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| 265 |
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| 266 | return output
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| 267 |
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| 268 |
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| 269 |
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| 270 | def get_yaml(item):
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| 271 | """ Get configuration yaml for 'item'"""
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| 272 | gfile = NODE_DIR + '/%s/wleiden.yaml' % item
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| 273 |
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| 274 | f = open(gfile, 'r')
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| 275 | datadump = yaml.load(f)
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| 276 | f.close()
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| 277 |
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| 278 | return datadump
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| 279 |
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| 280 |
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| 281 |
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| 282 | def write_yaml(item, datadump):
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| 283 | """ Write configuration yaml for 'item'"""
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| 284 | gfile = NODE_DIR + '/%s/wleiden.yaml' % item
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| 285 |
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| 286 | f = open(gfile, 'w')
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| 287 | f.write(format_wleiden_yaml(datadump))
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| 288 | f.close()
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| 289 |
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| 290 |
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| 291 |
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| 292 | def generate_resolv_conf(datadump):
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| 293 | """ Generate configuration file '/etc/resolv.conf' """
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| 294 | output = generate_header("#");
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| 295 | output += """\
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| 296 | search wleiden.net
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| 297 | # Try local (cache) first
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| 298 | nameserver 127.0.0.1
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| 299 |
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| 300 | # Proxies are recursive nameservers
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| 301 | # needs to be in resolv.conf for dnsmasq as well
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| 302 | """ % datadump
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| 303 |
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| 304 | for proxy in get_proxylist():
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| 305 | proxy_ip = get_yaml(proxy)['masterip']
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| 306 | output += "nameserver %-15s # %s\n" % (proxy_ip, proxy)
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| 307 | return output
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| 308 |
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| 309 |
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| 310 |
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| 311 | def format_yaml_value(value):
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| 312 | """ Get yaml value in right syntax for outputting """
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| 313 | if isinstance(value,str):
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| 314 | output = "'%s'" % value
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| 315 | else:
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| 316 | output = value
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| 317 | return output
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| 318 |
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| 319 |
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| 320 |
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| 321 | def format_wleiden_yaml(datadump):
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| 322 | """ Special formatting to ensure it is editable"""
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| 323 | output = "# Genesis config yaml style\n"
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| 324 | output += "# vim:ts=2:et:sw=2:ai\n"
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| 325 | output += "#\n"
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| 326 | iface_keys = [elem for elem in datadump.keys() if elem.startswith('iface_')]
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| 327 | for key in sorted(set(datadump.keys()) - set(iface_keys)):
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| 328 | output += "%-10s: %s\n" % (key, format_yaml_value(datadump[key]))
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| 329 |
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| 330 | output += "\n\n"
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| 331 |
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| 332 | key_order = [ 'comment', 'interface', 'ip', 'desc', 'sdesc', 'mode', 'type',
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| 333 | 'extra_type', 'channel', 'ssid', 'dhcp' ]
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| 334 |
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| 335 | for iface_key in sorted(iface_keys):
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| 336 | output += "%s:\n" % iface_key
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| 337 | for key in key_order + list(sorted(set(datadump[iface_key].keys()) - set(key_order))):
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| 338 | if datadump[iface_key].has_key(key):
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| 339 | output += " %-11s: %s\n" % (key, format_yaml_value(datadump[iface_key][key]))
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| 340 | output += "\n\n"
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| 341 |
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| 342 | return output
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| 343 |
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| 344 |
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| 345 |
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| 346 | def generate_wleiden_yaml(datadump):
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| 347 | """ Generate (petty) version of wleiden.yaml"""
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| 348 | output = generate_header("#")
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| 349 | output += format_wleiden_yaml(datadump)
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| 350 | return output
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| 351 |
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| 352 |
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| 353 |
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| 354 | def generate_config(node, config, datadump=None):
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| 355 | """ Print configuration file 'config' of 'node' """
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| 356 | output = ""
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| 357 | try:
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| 358 | # Load config file
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| 359 | if datadump == None:
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| 360 | datadump = get_yaml(node)
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| 361 |
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| 362 | # Preformat certain needed variables for formatting and push those into special object
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| 363 | datadump_extra = copy.deepcopy(datadump)
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| 364 | if not datadump_extra.has_key('domain'):
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| 365 | datadump_extra['domain'] = 'wleiden.net'
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| 366 | datadump_extra['nodename_lower'] = datadump_extra['nodename'].lower()
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| 367 | datadump_extra['iface_keys'] = sorted([elem for elem in datadump.keys() if elem.startswith('iface_')])
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| 368 |
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| 369 | if config == 'wleiden.yaml':
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| 370 | output += generate_wleiden_yaml(datadump)
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| 371 | elif config == 'authorized_keys':
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| 372 | f = open("global_keys", 'r')
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| 373 | output += f.read()
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| 374 | f.close()
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| 375 | elif config == 'dnsmasq.conf':
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| 376 | output += generate_dnsmasq_conf(datadump_extra)
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| 377 | elif config == 'rc.conf.local':
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| 378 | output += generate_rc_conf_local(datadump_extra)
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| 379 | elif config == 'resolv.conf':
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| 380 | output += generate_resolv_conf(datadump_extra)
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| 381 | else:
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| 382 | assert False, "Config not found!"
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| 383 | except IOError, e:
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| 384 | output += "[ERROR] Config file not found"
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| 385 | return output
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| 386 |
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| 387 |
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| 388 |
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| 389 | def process_cgi_request():
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| 390 | """ When calling from CGI """
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| 391 | # Update repository if requested
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| 392 | form = cgi.FieldStorage()
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| 393 | if form.getvalue("action") == "update":
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| 394 | print "Refresh: 5; url=."
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| 395 | print "Content-type:text/plain\r\n\r\n",
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| 396 | print "[INFO] Updating subverion, please wait..."
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| 397 | print subprocess.Popen(['svn', 'up', NODE_DIR], stderr=subprocess.STDOUT, stdout=subprocess.PIPE).communicate()[0],
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| 398 | print "[INFO] All done, redirecting in 5 seconds"
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| 399 | sys.exit(0)
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| 400 |
|
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| 401 |
|
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| 402 | uri = os.environ['PATH_INFO'].strip('/').split('/')
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|---|
| 403 | output = ""
|
|---|
| 404 | if not uri[0]:
|
|---|
| 405 | output += "Content-type:text/html\r\n\r\n"
|
|---|
| 406 | output += generate_title(get_hostlist())
|
|---|
| 407 | elif len(uri) == 1:
|
|---|
| 408 | output += "Content-type:text/plain\r\n\r\n"
|
|---|
| 409 | output += generate_node(uri[0])
|
|---|
| 410 | elif len(uri) == 2:
|
|---|
| 411 | output += "Content-type:text/plain\r\n\r\n"
|
|---|
| 412 | output += generate_config(uri[0], uri[1])
|
|---|
| 413 | else:
|
|---|
| 414 | assert False, "Invalid option"
|
|---|
| 415 | print output
|
|---|
| 416 |
|
|---|
| 417 |
|
|---|
| 418 | def usage():
|
|---|
| 419 | print """Usage: %s <standalone [port] |test [test arguments]|static>
|
|---|
| 420 | Examples:
|
|---|
| 421 | \tstandalone = Run configurator webserver [default port=8000]
|
|---|
| 422 | \tstatic = Generate all config files and store on disk
|
|---|
| 423 | \t with format ./static/%%NODE%%/%%FILE%%
|
|---|
| 424 | \ttest CNodeRick dnsmasq.conf = Receive output of CGI script
|
|---|
| 425 | \t for arguments CNodeRick/dnsmasq.conf
|
|---|
| 426 | """
|
|---|
| 427 | exit(0)
|
|---|
| 428 |
|
|---|
| 429 |
|
|---|
| 430 |
|
|---|
| 431 | def main():
|
|---|
| 432 | """Hard working sub"""
|
|---|
| 433 | # Allow easy hacking using the CLI
|
|---|
| 434 | if not os.environ.has_key('PATH_INFO'):
|
|---|
| 435 | if len(sys.argv) < 2:
|
|---|
| 436 | usage()
|
|---|
| 437 |
|
|---|
| 438 | if sys.argv[1] == "standalone":
|
|---|
| 439 | import SocketServer
|
|---|
| 440 | import CGIHTTPServer
|
|---|
| 441 | try:
|
|---|
| 442 | PORT = int(sys.argv[2])
|
|---|
| 443 | except (IndexError,ValueError):
|
|---|
| 444 | PORT = 8000
|
|---|
| 445 |
|
|---|
| 446 | class MyCGIHTTPRequestHandler(CGIHTTPServer.CGIHTTPRequestHandler):
|
|---|
| 447 | """ Serve this CGI from the root of the webserver """
|
|---|
| 448 | def is_cgi(self):
|
|---|
| 449 | if "favicon" in self.path:
|
|---|
| 450 | return False
|
|---|
| 451 |
|
|---|
| 452 | self.cgi_info = (__file__, self.path)
|
|---|
| 453 | self.path = ''
|
|---|
| 454 | return True
|
|---|
| 455 | handler = MyCGIHTTPRequestHandler
|
|---|
| 456 | httpd = SocketServer.TCPServer(("", PORT), handler)
|
|---|
| 457 | httpd.server_name = 'localhost'
|
|---|
| 458 | httpd.server_port = PORT
|
|---|
| 459 |
|
|---|
| 460 | print "serving at port", PORT
|
|---|
| 461 | httpd.serve_forever()
|
|---|
| 462 | elif sys.argv[1] == "test":
|
|---|
| 463 | os.environ['PATH_INFO'] = "/".join(sys.argv[2:])
|
|---|
| 464 | os.environ['SCRIPT_NAME'] = __file__
|
|---|
| 465 | process_cgi_request()
|
|---|
| 466 | elif sys.argv[1] == "static":
|
|---|
| 467 | items = dict()
|
|---|
| 468 | for node in get_hostlist():
|
|---|
| 469 | items['node'] = node
|
|---|
| 470 | items['wdir'] = "./static/%(node)s" % items
|
|---|
| 471 | if not os.path.isdir(items['wdir']):
|
|---|
| 472 | os.makedirs(items['wdir'])
|
|---|
| 473 | datadump = get_yaml(node)
|
|---|
| 474 | for config in files:
|
|---|
| 475 | items['config'] = config
|
|---|
| 476 | print "## Generating %(node)s %(config)s" % items
|
|---|
| 477 | f = open("%(wdir)s/%(config)s" % items, "w")
|
|---|
| 478 | f.write(generate_config(node, config, datadump))
|
|---|
| 479 | f.close()
|
|---|
| 480 | else:
|
|---|
| 481 | usage()
|
|---|
| 482 | else:
|
|---|
| 483 | cgitb.enable()
|
|---|
| 484 | process_cgi_request()
|
|---|
| 485 |
|
|---|
| 486 |
|
|---|
| 487 | if __name__ == "__main__":
|
|---|
| 488 | main()
|
|---|
