def subnetentry(x):
"""
Generate a subnet declaration block given an IPv4 prefix string
for inclusion in the dhcpd3 config file.
"""
addr = x.split("/")[0]
if ipaddress.is_ipv6_address(addr):
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,
)
def get_address_type(address):
addr, _slash, _prefixlen = address.partition("/")
if ipaddress.is_ipv4_address(addr):
address_type = "IPv4"
elif ipaddress.is_ipv6_address(addr):
address_type = "IPv6"
else:
raise NotImplementedError
return address_type
def generateFrrConf(cls, node):
"""
Returns configuration file text. Other services that depend on zebra
will have generatefrrifcconfig() and generatefrrconfig()
hooks that are invoked here.
"""
# we could verify here that filename == frr.conf
cfg = ""
for ifc in node.netifs():
cfg += "interface %s\n" % ifc.name
# include control interfaces in addressing but not routing daemons
if hasattr(ifc, "control") and ifc.control is True:
cfg += " "
cfg += "\n ".join(map(cls.addrstr, ifc.addrlist))
cfg += "\n"
continue
cfgv4 = ""
cfgv6 = ""
want_ipv4 = False
want_ipv6 = False
for s in node.services:
if cls.name not in s.dependencies:
continue
ifccfg = s.generatefrrifcconfig(node, ifc)
if s.ipv4_routing:
want_ipv4 = True
if s.ipv6_routing:
want_ipv6 = True
cfgv6 += ifccfg
else:
cfgv4 += ifccfg
if want_ipv4:
ipv4list = filter(
lambda x: ipaddress.is_ipv4_address(x.split("/")[0]),
ifc.addrlist)
cfg += " "
cfg += "\n ".join(map(cls.addrstr, ipv4list))
cfg += "\n"
cfg += cfgv4
if want_ipv6:
ipv6list = filter(
lambda x: ipaddress.is_ipv6_address(x.split("/")[0]),
ifc.addrlist)
cfg += " "
cfg += "\n ".join(map(cls.addrstr, ipv6list))
cfg += "\n"
cfg += cfgv6
cfg += "!\n"
for s in node.services:
if cls.name not in s.dependencies:
continue
cfg += s.generatefrrconfig(node)
return cfg
def subnetentry(x):
"""
Generate a subnet declaration block given an IPv6 prefix string
for inclusion in the RADVD config file.
"""
addr = x.split("/")[0]
if ipaddress.is_ipv6_address(addr):
net = Ipv6Prefix(x)
return str(net)
else:
return ""
def addrstr(x):
"""
helper for mapping IP addresses to zebra config statements
"""
addr = x.split("/")[0]
if ipaddress.is_ipv4_address(addr):
return "ip address %s" % x
elif ipaddress.is_ipv6_address(addr):
return "ipv6 address %s" % x
else:
raise ValueError("invalid address: %s", x)
def addrstr(x):
addr = x.split("/")[0]
if ipaddress.is_ipv6_address(addr):
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):
addr = x.split("/")[0]
if ipaddress.is_ipv6_address(addr):
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 generate_config(cls, node, filename):
# Check whether the node is running zebra
has_zebra = 0
for s in node.services:
if s.name == "zebra":
has_zebra = 1
cfg = "#!/bin/sh\n"
cfg += "# auto-generated by OvsService (OvsService.py)\n"
cfg += "/etc/init.d/openvswitch-switch start < /dev/null\n"
cfg += "ovs-vsctl add-br ovsbr0 -- set Bridge ovsbr0 fail-mode=secure\n"
cfg += "ifconfig ovsbr0 up\n"
for ifc in node.netifs():
if hasattr(ifc, "control") and ifc.control is True:
continue
ifnumstr = re.findall(r"\d+", ifc.name)
ifnum = ifnumstr[0]
# create virtual interfaces
cfg += "ip link add rtr%s type veth peer name sw%s\n" % (ifnum, ifnum)
cfg += "ifconfig rtr%s up\n" % ifnum
cfg += "ifconfig sw%s up\n" % ifnum
# remove ip address of eths because quagga/zebra will assign same IPs to rtr interfaces
# or assign them manually to rtr interfaces if zebra is not running
for ifcaddr in ifc.addrlist:
addr = ifcaddr.split("/")[0]
if ipaddress.is_ipv4_address(addr):
cfg += "ip addr del %s dev %s\n" % (ifcaddr, ifc.name)
if has_zebra == 0:
cfg += "ip addr add %s dev rtr%s\n" % (ifcaddr, ifnum)
elif ipaddress.is_ipv6_address(addr):
cfg += "ip -6 addr del %s dev %s\n" % (ifcaddr, ifc.name)
if has_zebra == 0:
cfg += "ip -6 addr add %s dev rtr%s\n" % (ifcaddr, ifnum)
else:
raise ValueError("invalid address: %s" % ifcaddr)
# add interfaces to bridge
cfg += "ovs-vsctl add-port ovsbr0 eth%s\n" % ifnum
cfg += "ovs-vsctl add-port ovsbr0 sw%s\n" % ifnum
# Add rule for default controller if there is one local (even if the controller is not local, it finds it)
cfg += "ovs-vsctl set-controller ovsbr0 tcp:127.0.0.1:6633\n"
# Setup default flows
portnum = 1
for ifc in node.netifs():
if hasattr(ifc, "control") and ifc.control is True:
continue
cfg += (
"ovs-ofctl add-flow ovsbr0 priority=1000,in_port=%d,action=output:%d\n"
% (portnum, portnum + 1)
)
cfg += (
"ovs-ofctl add-flow ovsbr0 priority=1000,in_port=%d,action=output:%d\n"
% (portnum + 1, portnum)
)
portnum += 2
return cfg
