| #!/usr/bin/python |
| |
| """ |
| Libraries for Trellis hosts. |
| """ |
| |
| import sys |
| sys.path.append('..') |
| from mininet.node import Host |
| from routinglib import RoutedHost |
| |
| class TaggedRoutedHost(RoutedHost): |
| """Host that can be configured with multiple IP addresses.""" |
| def __init__(self, name, ips, gateway, vlan, *args, **kwargs): |
| super(RoutedHost, self).__init__(name, *args, **kwargs) |
| self.ips = ips |
| self.gateway = gateway |
| self.vlan = vlan |
| self.vlanIntf = None |
| |
| def config(self, **kwargs): |
| Host.config(self, **kwargs) |
| self.vlanIntf = "%s.%s" % (self.defaultIntf(), self.vlan) |
| self.cmd('ip -4 addr flush dev %s' % self.defaultIntf()) |
| self.cmd('ip link add link %s name %s type vlan id %s' % (self.defaultIntf(), self.vlanIntf, self.vlan)) |
| self.cmd('ip link set up %s' % self.vlanIntf) |
| |
| for ip in self.ips: |
| self.cmd('ip addr add %s dev %s' % (ip, self.vlanIntf)) |
| |
| self.cmd('ip route add default via %s' % self.gateway) |
| |
| def terminate(self, **kwargs): |
| self.cmd('ip link remove link %s' % self.vlanIntf) |
| super(TaggedRoutedHost, self).terminate() |
| |
| class DhcpClient(Host): |
| def __init__(self, name, *args, **kwargs): |
| super(DhcpClient, self).__init__(name, **kwargs) |
| self.pidFile = '/run/dhclient-%s.pid' % self.name |
| |
| def config(self, **kwargs): |
| super(DhcpClient, self).config(**kwargs) |
| self.cmd('ip addr flush dev %s' % self.defaultIntf()) |
| self.cmd('dhclient -q -4 -nw -pf %s %s' % (self.pidFile, self.defaultIntf())) |
| |
| def terminate(self, **kwargs): |
| self.cmd('kill -9 `cat %s`' % self.pidFile) |
| self.cmd('rm -rf %s' % self.pidFile) |
| super(DhcpClient, self).terminate() |
| |
| class Dhcp6Client(Host): |
| def __init__(self, name, *args, **kwargs): |
| super(Dhcp6Client, self).__init__(name, **kwargs) |
| self.pidFile = '/run/dhclient-%s.pid' % self.name |
| |
| def config(self, **kwargs): |
| super(Dhcp6Client, self).config(**kwargs) |
| self.cmd('ip addr flush dev %s' % self.defaultIntf()) |
| linkLocalAddr = mac_to_ipv6_linklocal(kwargs['mac']) |
| self.cmd('ip -6 addr add dev %s scope link %s' % (self.defaultIntf(), linkLocalAddr)) |
| self.cmd('dhclient -q -6 -nw -pf %s %s' % (self.pidFile, self.defaultIntf())) |
| |
| def terminate(self, **kwargs): |
| self.cmd('kill -9 `cat %s`' % self.pidFile) |
| self.cmd('rm -rf %s' % self.pidFile) |
| super(Dhcp6Client, self).terminate() |
| |
| class DhcpServer(RoutedHost): |
| binFile = '/usr/sbin/dhcpd' |
| pidFile = '/run/dhcp-server/dhcpd.pid' |
| configFile = './dhcpd.conf' |
| |
| def config(self, **kwargs): |
| super(DhcpServer, self).config(**kwargs) |
| self.cmd('%s -q -4 -pf %s -cf %s %s' % (self.binFile, self.pidFile, self.configFile, self.defaultIntf())) |
| |
| def terminate(self, **kwargs): |
| self.cmd('kill -9 `cat %s`' % self.pidFile) |
| self.cmd('rm -rf %s' % self.pidFile) |
| super(DhcpServer, self).terminate() |
| |
| class Dhcp6Server(RoutedHost): |
| binFile = '/usr/sbin/dhcpd' |
| pidFile = '/run/dhcp-server/dhcpd6.pid' |
| configFile = './dhcpd6.conf' |
| leasesFile = '/var/lib/dhcp/dhcpd6.leases' |
| |
| def config(self, **kwargs): |
| super(Dhcp6Server, self).config(**kwargs) |
| linkLocalAddr = mac_to_ipv6_linklocal(kwargs['mac']) |
| self.cmd('ip -6 addr add dev %s scope link %s' % (self.defaultIntf(), linkLocalAddr)) |
| self.cmd('touch %s' % self.leasesFile) |
| self.cmd('%s -q -6 -pf %s -cf %s %s' % (self.binFile, self.pidFile, self.configFile, self.defaultIntf())) |
| |
| def terminate(self, **kwargs): |
| self.cmd('kill -9 `cat %s`' % self.pidFile) |
| self.cmd('rm -rf %s' % self.pidFile) |
| self.cmd('rm -rf %s' % self.leasesFile) |
| super(Dhcp6Server, self).terminate() |
| |
| class TaggedDhcpClient(Host): |
| def __init__(self, name, vlan, *args, **kwargs): |
| super(TaggedDhcpClient, self).__init__(name, **kwargs) |
| self.pidFile = '/run/dhclient-%s.pid' % self.name |
| self.vlan = vlan |
| self.vlanIntf = None |
| |
| def config(self, **kwargs): |
| super(TaggedDhcpClient, self).config(**kwargs) |
| self.vlanIntf = "%s.%s" % (self.defaultIntf(), self.vlan) |
| self.cmd('ip addr flush dev %s' % self.defaultIntf()) |
| self.cmd('ip link add link %s name %s type vlan id %s' % (self.defaultIntf(), self.vlanIntf, self.vlan)) |
| self.cmd('ip link set up %s' % self.vlanIntf) |
| self.cmd('dhclient -q -4 -nw -pf %s %s' % (self.pidFile, self.vlanIntf)) |
| |
| def terminate(self, **kwargs): |
| self.cmd('kill -9 `cat %s`' % self.pidFile) |
| self.cmd('rm -rf %s' % self.pidFile) |
| self.cmd('ip link remove link %s' % self.vlanIntf) |
| super(TaggedDhcpClient, self).terminate() |
| |
| class TaggedDhcpServer(TaggedRoutedHost): |
| binFile = '/usr/sbin/dhcpd' |
| pidFile = '/run/dhcp-server/dhcpd.pid' |
| configFile = './dhcpd.conf' |
| |
| def config(self, **kwargs): |
| super(TaggedDhcpServer, self).config(**kwargs) |
| self.cmd('%s -q -4 -pf %s -cf %s %s' % (self.binFile, self.pidFile, self.configFile, self.vlanIntf)) |
| |
| def terminate(self, **kwargs): |
| self.cmd('kill -9 `cat %s`' % self.pidFile) |
| self.cmd('rm -rf %s' % self.pidFile) |
| super(TaggedDhcpServer, self).terminate() |
| |
| class DualHomedDhcpClient(Host): |
| def __init__(self, name, *args, **kwargs): |
| super(DualHomedDhcpClient, self).__init__(name, **kwargs) |
| self.pidFile = '/run/dhclient-%s.pid' % self.name |
| self.bond0 = None |
| |
| def config(self, **kwargs): |
| super(DualHomedDhcpClient, self).config(**kwargs) |
| intf0 = self.intfs[0].name |
| intf1 = self.intfs[1].name |
| self.bond0 = "%s-bond0" % self.name |
| self.cmd('modprobe bonding') |
| self.cmd('ip link add %s type bond' % self.bond0) |
| self.cmd('ip link set %s down' % intf0) |
| self.cmd('ip link set %s down' % intf1) |
| self.cmd('ip link set %s master %s' % (intf0, self.bond0)) |
| self.cmd('ip link set %s master %s' % (intf1, self.bond0)) |
| self.cmd('ip addr flush dev %s' % intf0) |
| self.cmd('ip addr flush dev %s' % intf1) |
| self.cmd('ip link set %s up' % self.bond0) |
| self.cmd('dhclient -q -4 -nw -pf %s %s' % (self.pidFile, self.bond0)) |
| |
| def terminate(self, **kwargs): |
| self.cmd('ip link set %s down' % self.bond0) |
| self.cmd('ip link delete %s' % self.bond0) |
| self.cmd('kill -9 `cat %s`' % self.pidFile) |
| self.cmd('rm -rf %s' % self.pidFile) |
| super(DualHomedDhcpClient, self).terminate() |
| |
| # Utility for IPv6 |
| def mac_to_ipv6_linklocal(mac): |
| ''' |
| Convert mac address to link-local IPv6 address |
| ''' |
| # Remove the most common delimiters; dots, dashes, etc. |
| mac_value = int(mac.translate(None, ' .:-'), 16) |
| |
| # Split out the bytes that slot into the IPv6 address |
| # XOR the most significant byte with 0x02, inverting the |
| # Universal / Local bit |
| high2 = mac_value >> 32 & 0xffff ^ 0x0200 |
| high1 = mac_value >> 24 & 0xff |
| low1 = mac_value >> 16 & 0xff |
| low2 = mac_value & 0xffff |
| |
| return 'fe80::{:04x}:{:02x}ff:fe{:02x}:{:04x}'.format(high2, high1, low1, low2) |