| 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 glob
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| 8 | import os
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| 9 | import socket
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| 10 | import string
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| 11 | import subprocess
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| 12 | import sys
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| 13 | import time
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| 14 | import yaml
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| 15 |
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| 16 | __version__ = '$Id: gformat.py 8257 2010-08-08 08:12:51Z rick $'
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| 17 |
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| 18 | files = [
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| 19 | 'authorized_keys',
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| 20 | 'dnsmasq.conf',
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| 21 | 'rc.conf.local',
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| 22 | 'resolv.conf',
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| 23 | 'wleiden.yaml'
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| 24 | ]
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| 25 |
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| 26 |
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| 27 |
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| 28 | def print_title():
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| 29 | """ Main overview page """
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| 30 | items = {'root' : os.environ['SCRIPT_NAME'] }
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| 31 | print """
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| 32 | <html>
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| 33 | <head>
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| 34 | <title>Wireless leiden Configurator - GFormat</title>
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| 35 | <style type="text/css">
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| 36 | th {background-color: #999999}
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| 37 | tr:nth-child(odd) {background-color: #cccccc}
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| 38 | tr:nth-child(even) {background-color: #ffffff}
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| 39 | th, td {padding: 0.1em 1em}
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| 40 | </style>
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| 41 | </head>
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| 42 | <body>
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| 43 | <center>
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| 44 | <form type="GET" action="">
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| 45 | <input type="hidden" name="action" value="update">
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| 46 | <input type="submit" value="Update Configuration Database (SVN)">
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| 47 | </form>
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| 48 | <table>
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| 49 | <caption><h3>Wireless Leiden Configurator</h3></caption>
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| 50 | """ % items
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| 51 |
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| 52 | for node in sorted(nodelist):
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| 53 | items['node'] = node
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| 54 | print '<tr><td><a href="%(root)s/%(node)s">%(node)s</a></td>' % items
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| 55 | for config in files:
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| 56 | items['config'] = config
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| 57 | print '<td><a href="%(root)s/%(node)s/%(config)s">%(config)s</a></td>' % items
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| 58 | print "</tr>"
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| 59 | print """
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| 60 | </table>
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| 61 | <hr />
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| 62 | <em>%s</em>
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| 63 | </center>
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| 64 | </body>
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| 65 | </html>
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| 66 | """ % __version__
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| 67 |
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| 68 |
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| 69 |
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| 70 | def print_node(node):
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| 71 | """ Print overview of all files available for node """
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| 72 | print "\n".join(files)
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| 73 |
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| 74 |
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| 75 |
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| 76 | def generate_header(ctag="#"):
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| 77 | return """\
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| 78 | %(ctag)s
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| 79 | %(ctag)s DO NOT EDIT - Automatically generated by 'gformat'
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| 80 | %(ctag)s Generated at %(date)s by %(host)s
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| 81 | %(ctag)s
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| 82 | """ % { 'ctag' : ctag, 'date' : time.ctime(), 'host' : socket.gethostname() }
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| 83 |
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| 84 |
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| 85 |
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| 86 | def parseaddr(s):
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| 87 | """ Process IPv4 CIDR notation addr to a (binary) number """
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| 88 | f = s.split('.')
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| 89 | return (long(f[0]) << 24L) + \
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| 90 | (long(f[1]) << 16L) + \
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| 91 | (long(f[2]) << 8L) + \
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| 92 | long(f[3])
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| 93 |
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| 94 |
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| 95 |
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| 96 | def showaddr(a):
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| 97 | """ Display IPv4 addr in (dotted) CIDR notation """
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| 98 | return "%d.%d.%d.%d" % ((a >> 24) & 0xff, (a >> 16) & 0xff, (a >> 8) & 0xff, a & 0xff)
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| 99 |
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| 100 |
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| 101 |
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| 102 | def netmask2subnet(netmask):
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| 103 | """ Given a 'netmask' return corresponding CIDR """
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| 104 | return showaddr(0xffffffff & (0xffffffff << (32 - int(netmask))))
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| 105 |
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| 106 |
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| 107 |
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| 108 | def generate_dnsmasq_conf(datadump):
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| 109 | """ Generate configuration file '/usr/local/etc/dnsmasq.conf' """
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| 110 | output = generate_header()
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| 111 | output += """\
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| 112 | # DHCP server options
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| 113 | dhcp-authoritative
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| 114 | dhcp-fqdn
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| 115 | domain=dhcp.%(nodename_lower)s.%(domain)s
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| 116 | domain-needed
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| 117 | expand-hosts
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| 118 |
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| 119 | # Low memory footprint
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| 120 | cache-size=10000
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| 121 | \n""" % datadump
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| 122 |
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| 123 | for iface_key in datadump['iface_keys']:
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| 124 | output += "## %(interface)s %(desc)s\n" % datadump[iface_key]
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| 125 |
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| 126 | try:
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| 127 | (dhcp_start, dhcp_stop) = datadump[iface_key]['dhcp'].split('-')
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| 128 | (ip, netmask) = datadump[iface_key]['ip'].split('/')
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| 129 | datadump[iface_key]['subnet'] = netmask2subnet(netmask)
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| 130 | except AttributeError:
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| 131 | output += "# not autoritive\n\n"
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| 132 | continue
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| 133 |
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| 134 | dhcp_part = ".".join(ip.split('.')[0:3])
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| 135 | datadump[iface_key]['dhcp_start'] = dhcp_part + "." + dhcp_start
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| 136 | datadump[iface_key]['dhcp_stop'] = dhcp_part + "." + dhcp_stop
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| 137 | output += "dhcp-range=%(interface)s,%(dhcp_start)s,%(dhcp_stop)s,%(subnet)s,24h\n\n" % datadump[iface_key]
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| 138 |
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| 139 | return output
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| 140 |
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| 141 |
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| 142 |
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| 143 | def generate_rc_conf_local(datadump):
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| 144 | """ Generate configuration file '/etc/rc.conf.local' """
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| 145 | output = generate_header("#");
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| 146 | output += """\
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| 147 | hostname='%(nodetype)s%(nodename)s.%(domain)s'
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| 148 | location='%(location)s'
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| 149 | """ % datadump
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| 150 |
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| 151 | # TProxy configuration
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| 152 | output += "\n"
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| 153 | try:
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| 154 | if datadump['tproxy']:
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| 155 | output += """\
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| 156 | tproxy_enable='YES'
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| 157 | tproxy_range='%(tproxy)s'
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| 158 | """ % datadump
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| 159 | except KeyError:
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| 160 | output += "tproxy_enable='NO'\n"
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| 161 |
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| 162 | output += '\n'
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| 163 | # lo0 configuration:
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| 164 | # - 172.32.255.1/32 is the proxy.wleiden.net deflector
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| 165 | # - masterip is special as it needs to be assigned to at
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| 166 | # least one interface, so if not used assign to lo0
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| 167 | addrs_list = { 'lo0' : ["127.0.0.1/8", "172.31.255.1/32"] }
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| 168 | iface_map = {'lo0' : 'lo0'}
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| 169 | if not any([datadump[iface_key]['ip'].startswith(datadump['masterip']) \
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| 170 | for iface_key in datadump['iface_keys']]):
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| 171 | lo0_addrs.append(datadump['masterip'] + "/32")
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| 172 |
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| 173 | wlan_count = 0
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| 174 | for iface_key in datadump['iface_keys']:
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| 175 | ifacedump = datadump[iface_key]
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| 176 | interface = ifacedump['interface']
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| 177 | # By default no special interface mapping
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| 178 | iface_map[interface] = interface
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| 179 |
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| 180 | # Add interface IP to list
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| 181 | if addrs_list.has_key(interface):
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| 182 | addrs_list[interface].append(ifacedump['ip'])
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| 183 | else:
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| 184 | addrs_list[interface] = [ifacedump['ip']]
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| 185 |
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| 186 | # Alias only needs IP assignment for now, this might change if we
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| 187 | # are going to use virtual accesspoints
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| 188 | if "alias" in iface_key:
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| 189 | continue
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| 190 |
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| 191 | # XXX: Might want to deduct type directly from interface name
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| 192 | if ifacedump['type'] in ['11a', '11b', '11g', 'wireless']:
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| 193 | # Create wlanX interface
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| 194 | ifacedump['wlanif'] ="wlan%i" % wlan_count
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| 195 | iface_map[interface] = ifacedump['wlanif']
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| 196 | wlan_count += 1
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| 197 |
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| 198 | # Default to station (client) mode
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| 199 | ifacedump['wlanmode'] = "sta"
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| 200 | if ifacedump['mode'] in ['master']:
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| 201 | ifacedump['wlanmode'] = "ap"
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| 202 | # Default to 802.11b mode
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| 203 | ifacedump['mode'] = '11b'
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| 204 | if ifacedump['type'] in ['11a', '11b' '11g']:
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| 205 | ifacedump['mode'] = ifacedump['type']
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| 206 |
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| 207 | if not ifacedump.has_key('channel'):
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| 208 | if ifacedump['type'] == '11a':
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| 209 | ifacedump['channel'] = 36
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| 210 | else:
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| 211 | ifacedump['channel'] = 1
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| 212 |
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| 213 | # Allow special hacks at the back like wds and stuff
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| 214 | if not ifacedump.has_key('extra'):
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| 215 | ifacedump['extra'] = 'regdomain ETSI country NL'
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| 216 |
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| 217 | output += "wlans_%(interface)s='%(wlanif)s'\n" % ifacedump
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| 218 | output += ("create_args_%(wlanif)s='wlanmode %(wlanmode)s mode " +\
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| 219 | "%(mode)s ssid %(ssid)s channel %(channel)s %(extra)s'\n") % ifacedump
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| 220 |
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| 221 | elif ifacedump['type'] in ['ethernet', 'eth']:
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| 222 | # No special config needed besides IP
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| 223 | pass
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| 224 | else:
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| 225 | assert False, "Unknown type " + ifacedump['type']
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| 226 |
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| 227 | # Print IP address which needs to be assigned over here
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| 228 | output += "\n"
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| 229 | for iface,addrs in sorted(addrs_list.iteritems()):
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| 230 | output += "ipv4_addrs_%s='%s'\n" % (iface_map[iface], " ".join(addrs))
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| 231 |
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| 232 | return output
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| 233 |
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| 234 |
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| 235 |
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| 236 | def get_yaml(item):
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| 237 | """ Get configuration yaml for 'item'"""
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| 238 | gfile = item + '/wleiden.yaml'
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| 239 | gfile = 'test.yaml'
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| 240 |
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| 241 | f = open(gfile, 'r')
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| 242 | datadump = yaml.load(f)
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| 243 | f.close()
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| 244 |
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| 245 | return datadump
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| 246 |
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| 247 |
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| 248 |
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| 249 | def generate_resolv_conf(datadump):
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| 250 | """ Generate configuration file '/etc/resolv.conf' """
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| 251 | output = generate_header("#");
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| 252 | output += """\
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| 253 | search wleiden.net
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| 254 | # Try local (cache) first
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| 255 | nameserver 127.0.0.1
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| 256 |
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| 257 | # Proxies are recursive nameservers
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| 258 | # needs to be in resolv.conf for dnsmasq as well
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| 259 | """ % datadump
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| 260 |
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| 261 | # proxyX sorting based on X number
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| 262 | proxies = sorted(glob.glob("proxy*"),
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| 263 | key=lambda name: int(''.join([c for c in name if c in string.digits])),
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| 264 | cmp=lambda x,y: x - y)
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| 265 |
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| 266 | for proxy in proxies:
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| 267 | proxy_ip = get_yaml(proxy)['masterip']
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| 268 | output += "nameserver %-15s # %s\n" % (proxy_ip, proxy)
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| 269 | return output
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| 270 |
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| 271 |
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| 272 |
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| 273 | def generate_wleiden_yaml(datadump):
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| 274 | """ Special formatting to ensure it is editable"""
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| 275 | output = "# Genesis config yaml style\n"
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| 276 | output += "#\n"
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| 277 | iface_keys = [elem for elem in datadump.keys() if elem.startswith('iface_')]
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| 278 | for key in sorted(set(datadump.keys()) - set(iface_keys)):
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| 279 | output += "%s: %s\n" % (key, datadump[key])
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| 280 |
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| 281 | output += "\n\n"
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| 282 |
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| 283 | for iface_key in sorted(iface_keys):
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| 284 | output += "%s:\n" % iface_key
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| 285 | output += yaml.dump(datadump[iface_key], default_flow_style=False)
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| 286 | output += "\n\n"
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| 287 |
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| 288 | return output
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| 289 |
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| 290 |
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| 291 |
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| 292 | def print_config(node, config):
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| 293 | """ Print configuration file 'config' of 'node' """
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| 294 | try:
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| 295 | # Load config file
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| 296 | datadump = get_yaml(node)
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| 297 |
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| 298 | if config == 'wleiden.yaml':
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| 299 | print generate_wleiden_yaml(datadump)
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| 300 | return
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| 301 |
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| 302 | # Preformat certain needed variables for formatting
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| 303 | if not datadump.has_key('domain'):
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| 304 | datadump['domain'] = 'wleiden.net'
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| 305 | datadump['nodename_lower'] = datadump['nodename'].lower()
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| 306 | datadump['iface_keys'] = sorted([elem for elem in datadump.keys() if elem.startswith('iface_')])
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| 307 |
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| 308 | if config == 'authorized_keys':
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| 309 | f = open("global_keys", 'r')
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| 310 | print f.read()
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| 311 | f.close()
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| 312 | elif config == 'dnsmasq.conf':
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| 313 | print generate_dnsmasq_conf(datadump)
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| 314 | elif config == 'rc.conf.local':
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| 315 | print generate_rc_conf_local(datadump)
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| 316 | elif config == 'resolv.conf':
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| 317 | print generate_resolv_conf(datadump)
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| 318 | else:
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| 319 | assert False, "Config not found!"
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| 320 | except IOError, e:
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| 321 | print "[ERROR] Config file not found"
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| 322 |
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| 323 |
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| 324 | #
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| 325 | # Main worker
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| 326 |
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| 327 | # Update repository if requested
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| 328 | form = cgi.FieldStorage()
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| 329 | if form.getvalue("action") == "update":
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| 330 | print "Refresh: 5; url=%s" % os.environ['SCRIPT_NAME']
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| 331 | print "Content-type:text/plain\r\n\r\n",
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| 332 | print "[INFO] Updating subverion, please wait..."
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| 333 | print subprocess.Popen(['svn', 'up', '/home/rvdzwet/wleiden/genesis/nodes'], stderr=subprocess.STDOUT, stdout=subprocess.PIPE).communicate()[0],
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| 334 | print "[INFO] All done, redirecting in 5 seconds"
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| 335 | sys.exit(0)
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| 336 |
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| 337 | nodelist = glob.glob("CNode*")
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| 338 |
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| 339 | uri = os.environ['PATH_INFO'].strip('/').split('/')
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| 340 | if not uri[0]:
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| 341 | print_title()
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| 342 | elif len(uri) == 1:
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| 343 | print "Content-type:text/plain\r\n\r\n",
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| 344 | print_node(uri[0])
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| 345 | elif len(uri) == 2:
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| 346 | print "Content-type:text/plain\r\n\r\n",
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| 347 | print_config(uri[0], uri[1])
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| 348 | else:
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| 349 | assert False, "Invalid option"
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| 350 |
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| 351 | sys.exit(0)
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