diff options
| -rwxr-xr-x | python/vyos/interfaceconfig.py | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/python/vyos/interfaceconfig.py b/python/vyos/interfaceconfig.py new file mode 100755 index 000000000..7f9cc00f8 --- /dev/null +++ b/python/vyos/interfaceconfig.py @@ -0,0 +1,357 @@ +#!/usr/bin/python3 + +# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io> +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library. If not, see <http://www.gnu.org/licenses/>. + +import sys +import os +import json +import socket +import subprocess + +dhclient_conf_dir = r'/var/lib/dhcp/dhclient_' + +class Interface(): + def __init__(self, ifname=None, type=None): + if not ifname: + raise Exception("interface name required") + if not os.path.exists('/sys/class/net/{0}'.format(ifname)) and not type: + raise Exception("interface {0} not found".format(str(ifname))) + else: + if not os.path.exists('/sys/class/net/{0}'.format(ifname)): + try: + ret = subprocess.check_output(['ip link add dev ' + str(ifname) + ' type ' + type], stderr=subprocess.STDOUT, shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + if "Operation not supported" in str(e.output.decode()): + print(str(e.output.decode())) + sys.exit(0) + + self.ifname = str(ifname) + + def _debug(self, e=None): + """ + export DEBUG=1 to see debug messages + """ + if os.getenv('DEBUG') == '1': + if e: + print ("Exception raised:\ncommand: {0}\nerror code: {1}\nsubprocess output: {2}".format(e.cmd, e.returncode, e.output.decode()) ) + return True + return False + + + def set_alias(self, alias=None): + if not alias: + open('/sys/class/net/{0}/ifalias'.format(self.ifname),'w').write(self.ifname) + else: + open('/sys/class/net/{0}/ifalias'.format(self.ifname),'w').write(str(alias)) + + def get_alias(self): + return open('/sys/class/net/{0}/ifalias'.format(self.ifname),'r').read() + + def del_alias(self): + open('/sys/class/net/{0}/ifalias'.format(self.ifname),'w').write() + + + def set_link_state(self, state="up"): + if state.lower() == 'up' or state.lower() == 'down': + try: + ret = subprocess.check_output(['ip link set dev ' + self.ifname + ' ' + state], shell=True).decode() + return 0 + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return 1 + else: + raise ValueError("value can only be up or down") + + def get_link_state(self): + """ + returns either up/down or None if it can't find the state + """ + try: + ret = subprocess.check_output(['ip -j link show ' + self.ifname], shell=True).decode() + s = json.loads(ret) + return s[0]['operstate'].lower() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + + def remove_interface(self): + try: + ret = subprocess.check_output(['ip link del dev ' + self.ifname], shell=True).decode() + return 0 + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + + def set_macaddr(self, mac=None): + # ip will give us an error if the mac is invalid + try: + ret = subprocess.check_output(['ip link set address ' + mac + ' ' + self.ifname], shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + def get_macaddr(self): + try: + ret = subprocess.check_output(['ip -j -4 link show dev ' + self.ifname], stderr=subprocess.STDOUT, shell=True).decode() + j = json.loads(ret) + return j[0]['address'] + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + + def get_ipv4_addr(self): + """ + reads all IPs assigned to an interface and returns it in a list, + or None if no IP address is assigned to the interface + """ + ips = [] + try: + ret = subprocess.check_output(['ip -j -4 addr show dev ' + self.ifname], stderr=subprocess.STDOUT, shell=True).decode() + j = json.loads(ret) + for i in j: + if len(i) != 0: + for addr in i['addr_info']: + ips.append(addr['local']) + return ips + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + + def get_ipv6_addr(self): + """ + reads all IPs assigned to an interface and returns it in a list, + or None if no IP address is assigned to the interface + """ + ips = [] + try: + ret = subprocess.check_output(['ip -j -6 addr show dev ' + self.ifname], stderr=subprocess.STDOUT, shell=True).decode() + j = json.loads(ret) + for i in j: + if len(i) != 0: + for addr in i['addr_info']: + ips.append(addr['local']) + return ips + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + + def add_ipv4_addr(self, ipaddr=[]): + """ + add addresses on the interface + """ + for ip in ipaddr: + try: + ret = subprocess.check_output(['ip -4 address add ' + ip + ' dev ' + self.ifname], stderr=subprocess.STDOUT, shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + return True + + + def del_ipv4_addr(self, ipaddr=[]): + """ + delete addresses on the interface + """ + for ip in ipaddr: + try: + ret = subprocess.check_output(['ip -4 address del ' + ip + ' dev ' + self.ifname], stderr=subprocess.STDOUT, shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + return True + + + def add_ipv6_addr(self, ipaddr=[]): + """ + add addresses on the interface + """ + for ip in ipaddr: + try: + ret = subprocess.check_output(['ip -6 address add ' + ip + ' dev ' + self.ifname], stderr=subprocess.STDOUT, shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + return True + + + def del_ipv6_addr(self, ipaddr=[]): + """ + delete addresses on the interface + """ + for ip in ipaddr: + try: + ret = subprocess.check_output(['ip -6 address del ' + ip + ' dev ' + self.ifname], stderr=subprocess.STDOUT, shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + return True + + + def get_mtu(self): + try: + ret = subprocess.check_output(['ip -j link list dev ' + self.ifname], shell=True).decode() + a = json.loads(ret)[0] + return a['mtu'] + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + def set_mtu(self, mtu=None): + if not mtu: + return None + try: + ret = subprocess.check_output(['ip link set mtu ' + str(mtu) + ' dev ' + self.ifname], shell=True).decode() + return True + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + + #### replace dhcpv4/v6 with systemd.networkd? + def set_dhcpv4(self): + conf_file = dhclient_conf_dir + self.ifname + '.conf' + pidfile = dhclient_conf_dir + self.ifname + '.pid' + leasefile = dhclient_conf_dir + self.ifname + '.leases' + + a = [ + '# generated by interface_config.py', + 'option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;', + 'interface \"' + self.ifname + '\" {', + '\tsend host-name \"' + socket.gethostname() +'\";', + '\trequest subnet-mask, broadcast-address, routers, domain-name-servers, rfc3442-classless-static-routes, domain-name, interface-mtu;', + '}' + ] + + cnf = "" + for ln in a: + cnf +=str(ln + "\n") + open(conf_file, 'w').write(cnf) + if os.path.exists(dhclient_conf_dir + self.ifname + '.pid'): + try: + ret = subprocess.check_output(['/sbin/dhclient -4 -r -pf ' + pidfile], shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + try: + ret = subprocess.check_output(['/sbin/dhclient -4 -q -nw -cf ' + conf_file + ' -pf ' + pidfile + ' -lf ' + leasefile + ' ' + self.ifname], shell=True).decode() + return True + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + def del_dhcpv4(self): + conf_file = dhclient_conf_dir + self.ifname + '.conf' + pidfile = dhclient_conf_dir + self.ifname + '.pid' + leasefile = dhclient_conf_dir + self.ifname + '.leases' + if not os.path.exists(pidfile): + return 1 + try: + ret = subprocess.check_output(['/sbin/dhclient -4 -r -pf ' + pidfile], shell=True).decode() + return True + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + def get_dhcpv4(self): + pidfile = dhclient_conf_dir + self.ifname + '.pid' + if not os.path.exists(pidfile): + print ("no dhcp client running on interface {0}".format(self.ifname)) + return False + else: + pid = open(pidfile, 'r').read() + print("dhclient running on {0} with pid {1}".format(self.ifname, pid)) + return True + + + def set_dhcpv6(self): + conf_file = dhclient_conf_dir + self.ifname + '.v6conf' + pidfile = dhclient_conf_dir + self.ifname + '.v6pid' + leasefile = dhclient_conf_dir + self.ifname + '.v6leases' + a = [ + '# generated by interface_config.py', + 'interface \"' + self.ifname + '\" {', + '\trequest routers, domain-name-servers, domain-name;', + '}' + ] + cnf = "" + for ln in a: + cnf +=str(ln + "\n") + open(conf_file, 'w').write(cnf) + subprocess.call(['sysctl', '-q', '-w', 'net.ipv6.conf.' + self.ifname + '.accept_ra=0']) + if os.path.exists(pidfile): + try: + ret = subprocess.check_output(['/sbin/dhclient -6 -q -x -pf ' + pidfile], shell=True).decode() + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + try: + ret = subprocess.check_output(['/sbin/dhclient -6 -q -nw -cf ' + conf_file + ' -pf ' + pidfile + ' -lf ' + leasefile + ' ' + self.ifname], shell=True).decode() + return True + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + def del_dhcpv6(self): + conf_file = dhclient_conf_dir + self.ifname + '.v6conf' + pidfile = dhclient_conf_dir + self.ifname + '.v6pid' + leasefile = dhclient_conf_dir + self.ifname + '.v6leases' + if not os.path.exists(pidfile): + return 1 + try: + ret = subprocess.check_output(['/sbin/dhclient -6 -q -x -pf ' + pidfile], shell=True).decode() + subprocess.call(['sysctl', '-q', '-w', 'net.ipv6.conf.' + self.ifname + '.accept_ra=1']) + return True + except subprocess.CalledProcessError as e: + if self._debug(): + self._debug(e) + return None + + def get_dhcpv6(self): + pidfile = dhclient_conf_dir + self.ifname + '.v6pid' + if not os.path.exists(pidfile): + print ("no dhcpv6 client running on interface {0}".format(self.ifname)) + return False + else: + pid = open(pidfile, 'r').read() + print("dhclientv6 running on {0} with pid {1}".format(self.ifname, pid)) + return True + + +#### TODO: dhcpv6-pd via dhclient + |