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