crans_bcfg2/Python/etc/network/interfaces

# -*- coding: utf-8; mode: python -*-

include("ip")
include("arpwatch")

info["owner"] = "root"
info["group"] = "root"
info["perms"] = 0644

import config.dns

header("""
Les modifications locales sont a mettre dans le fichier /etc/network/interfaces.local

Voir http://wiki.crans.org/CransTechnique/Bcfg2/... pour plus d'explications.
""")

configured_ifaces=[]

def dev(interface, mode, additionnals=[]):
    """Generation de la conf d'une interface:

    - additionnals contient des lignes a mettre en plus a la definition"""
    configured_ifaces.append(interface)

    if mode == "pub":
        print """auto %(interface)s
iface %(interface)s inet static
    address %(ip)s
    network 138.231.136.0
    netmask 255.255.248.0
    broadcast 138.231.143.255
    mtu 1496
    gateway 138.231.136.4
    dns-nameservers %(nameservers)s
    dns-search crans.org""" % { 'interface': interface, 'ip': pubip(), 'nameservers': ' '.join(config.dns.recursiv['fil']) }
    
        for line in additionnals:
            print "   ", line
        print

        pub6(interface)

    elif mode == "wifi":
        print """auto %(interface)s
iface %(interface)s inet static
    address %(ip)s
    network 138.231.144.0
    netmask 255.255.248.0
    broadcast 138.231.151.255
    mtu 1496
    dns-nameservers %(nameservers)s
    dns-search wifi.crans.org""" % { 'interface': interface, 'ip': wifiip(), 'nameservers': ' '.join(config.dns.recursiv['wifi']) }

        for line in additionnals:
            print "   ", line
        print

    elif mode == "adm":
        print """auto %(interface)s
iface %(interface)s inet static
    address %(ip)s
    network 10.231.136.0
    netmask 255.255.255.0
    broadcast 10.231.136.255
    mtu 1496
    dns-nameservers %(nameservers)s
    dns-search adm.crans.org""" % { 'interface': interface, 'ip': admip(), 'nameservers': ' '.join(config.dns.recursiv['adm']) }

        for line in additionnals:
            print "   ", line
        print

        adm6(interface)

    elif mode == "radin":
        print """auto %(interface)s
iface %(interface)s inet static
    address %(ip)s
    network 10.42.0.0
    netmask 255.255.0.0
    broadcast 10.42.255.255
    mtu 1496""" % { 'interface': interface, 'ip': radinip() }

    elif mode == "accueil":
        print """auto %(interface)s
iface %(interface)s inet static
    address %(ip)s
    network 10.51.0.0
    netmask 255.255.0.0
    broadcast 10.51.255.255
    mtu 1496""" % { 'interface': interface, 'ip': accueilip() }

    elif mode == "ens":
        print """auto %(interface)s
iface %(interface)s inet static
    address %(ip)s
    network 10.2.9.0
    netmask 255.255.255.0
    broadcast 10.2.9.255
    mtu 1496""" % { 'interface': interface, 'ip': appt_ens_ip() }

    elif mode == "isolement":
        print """auto %(interface)s
iface %(interface)s inet static
    address %(ip)s
    network 10.52.0.0
    netmask 255.255.0.0
    broadcast 10.52.255.255
    mtu 1496""" % { 'interface': interface, 'ip': isolementip() }

    elif mode == "manuel":
        print """auto %(interface)s
iface %(interface)s inet static""" % { 'interface': interface }

    elif mode == "vide":
        try:
            iface, vlan = interface.split('.')
        except ValueError:
            vlan = None
        if vlan:
            print """auto %(interface)s
iface %(interface)s inet manual
    pre-up vconfig add %(iface)s %(vlan)s
    post-down vconfig rem %(iface)s.%(vlan)s
    up ip l set %(interface)s up
    down ip l set %(interface)s down""" % { 'interface': interface, 'iface':iface,'vlan':vlan }
        else:
            print """auto %(interface)s
iface %(interface)s inet manual
    up ip l set %(interface)s up
    down ip l set %(interface)s down""" % { 'interface': interface }

    else:
        raise NotImplementedError, "Mode de reseau inconnu : %s" % mode

    if mode != "pub" and mode != "adm" and mode != "wifi" :
        for line in additionnals:
            print "   ", line
        print

# Definitions communes
print """auto lo
iface lo inet loopback
"""

# Pour arpwatch, on surveille nos réseaux
def otherlisteners():
    print "#Interfaces d'ecoute restantes pour arpwatch "
    for vlan in watched_vlans:
        if vlan == 1:
            iface = 'eth0'
        else:
            iface = 'eth0.%d' % vlan
        if not iface in configured_ifaces:
            dev(iface,'vide')

def pubip6(If):
     if len(If_Mac[If].split(':'))<4: alt = ':'
     else: alt = ''
     return "2a01:240:fe3d:4:" + alt + If_Mac[If]

def admip6(If):
     if len(If_Mac[If].split(':'))<4: alt = ':'
     else: alt = ''
     return "2a01:240:fe3d:c804:" + alt + If_Mac[If]

def pub6(interface, mode = 'serveur'):
    """ fonction permettant d'ajouter une adressse ipv6 a l'interface donnee en argument.
    Le mode permet de faire la distinction entre les simples serveurs et les routeurs.
    En effet, il est assez peu fortuit de rajouter une route par defaut qui va faire une boucle."""
    print """iface %(interface)s inet6 static
    address %(ip6)s
    netmask 64""" % { 'interface': interface, 'ip6': pubip6(interface) }
    if mode == 'serveur':
        print '    gateway fe80::219:bbff:fe31:3b80'
    elif mode == 'routeur':
        print '    up ip r add dev %s 2a01:240:fe3d:f7::/64 via 2a01:240:fe3d:4:20f:1fff:fe66:e0e8' % interface
    print 

def adm6(interface):
    print """iface %(interface)s inet6 static
    address %(ip6)s
    netmask 64""" % { 'interface': interface, 'ip6': admip6(interface) }
    print

Probe_Mac = metadata.Probes["mac"].split('\n')
If_Mac = dict(zip(Probe_Mac[:-1:2], Probe_Mac[1::2]))

exec(str(metadata.Probes["interfaces_local"]))