def subnetentry(x):
"""
Generate a subnet declaration block given an IPv4 prefix string
for inclusion in the config file.
"""
if x.find(":") >= 0:
# this is an IPv6 address
return ""
else:
net = Ipv4Prefix(x)
return 'echo " network %s"' % net
def addrstr(x):
if x.find(":") >= 0:
net = Ipv6Prefix(x)
else:
net = Ipv4Prefix(x)
if net.max_addr() == net.min_addr():
return ""
else:
if os.uname()[0] == "Linux":
rtcmd = "ip route add default via"
else:
raise Exception("unknown platform")
return "%s %s" % (rtcmd, net.min_addr())
def routestr(x):
if x.find(":") >= 0:
net = Ipv6Prefix(x)
dst = "3ffe:4::/64"
else:
net = Ipv4Prefix(x)
dst = "10.9.8.0/24"
if net.max_addr() == net.min_addr():
return ""
else:
if os.uname()[0] == "Linux":
rtcmd = "#/sbin/ip route add %s via" % dst
else:
raise Exception("unknown platform")
return "%s %s" % (rtcmd, net.min_addr())
def firstipv4prefix(node, prefixlen=24):
"""
Similar to QuaggaService.routerid(). Helper to return the first IPv4
prefix of a node, using the supplied prefix length. This ignores the
interface's prefix length, so e.g. '/32' can turn into '/24'.
"""
for ifc in node.netifs():
if hasattr(ifc, 'control') and ifc.control == True:
continue
for a in ifc.addrlist:
if a.find(".") >= 0:
addr = a.split('/')[0]
pre = Ipv4Prefix("%s/%s" % (addr, prefixlen))
return str(pre)
# raise ValueError, "no IPv4 address found"
return "0.0.0.0/%s" % prefixlen
def __init__(self, ip4_prefix=None, ip6_prefix=None):
"""
Creates an IpPrefixes object.
:param str ip4_prefix: ip4 prefix to use for generation
:param str ip6_prefix: ip6 prefix to use for generation
:raises ValueError: when both ip4 and ip6 prefixes have not been provided
"""
if not ip4_prefix and not ip6_prefix:
raise ValueError("ip4 or ip6 must be provided")
self.ip4 = None
if ip4_prefix:
self.ip4 = Ipv4Prefix(ip4_prefix)
self.ip6 = None
if ip6_prefix:
self.ip6 = Ipv6Prefix(ip6_prefix)
def addrstr(x):
if x.find(":") >= 0:
net = Ipv6Prefix(x)
fam = "inet6 ::"
else:
net = Ipv4Prefix(x)
fam = "inet 0.0.0.0"
if net.max_addr() == net.min_addr():
return ""
else:
if os.uname()[0] == "Linux":
rtcmd = "ip route add default via"
elif os.uname()[0] == "FreeBSD":
rtcmd = "route add -%s" % fam
else:
raise Exception, "unknown platform"
return "%s %s" % (rtcmd, net.min_addr())
def subnetentry(x):
"""
Generate a subnet declaration block given an IPv4 prefix string
for inclusion in the dhcpd3 config file.
"""
if x.find(":") >= 0:
return ""
else:
addr = x.split("/")[0]
net = Ipv4Prefix(x)
# divide the address space in half
rangelow = net.addr(net.num_addr() / 2)
rangehigh = net.max_addr()
return """
subnet %s netmask %s {
pool {
range %s %s;
default-lease-time 600;
option routers %s;
}
}
""" % (net.prefix_str(), net.netmask_str(), rangelow, rangehigh, addr)
