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napalm-danos/napalm_vyos/vyos.py

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# Copyright 2016 Dravetech AB. All rights reserved.
#
# The contents of this file are licensed under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
"""
Napalm driver for VyOS.
Read napalm.readthedocs.org for more information.
"""
import re
import os
import tempfile
import vyattaconfparser
from netmiko import __version__ as netmiko_version
from netmiko import ConnectHandler
from netmiko import SCPConn
# NAPALM base
import napalm.base.constants as C
from napalm.base.base import NetworkDriver
from napalm.base.exceptions import ConnectionException, MergeConfigException, \
ReplaceConfigException, CommitError, \
CommandErrorException
class VyOSDriver(NetworkDriver):
_MINUTE_SECONDS = 60
_HOUR_SECONDS = 60 * _MINUTE_SECONDS
_DAY_SECONDS = 24 * _HOUR_SECONDS
_WEEK_SECONDS = 7 * _DAY_SECONDS
_YEAR_SECONDS = 365 * _DAY_SECONDS
_DEST_FILENAME = "/var/tmp/candidate_running.conf"
_BACKUP_FILENAME = "/var/tmp/backup_running.conf"
_BOOT_FILENAME = "/config/config.boot"
def __init__(self, hostname, username, password, timeout=60, optional_args=None):
self.hostname = hostname
self.username = username
self.password = password
self.timeout = timeout
self.device = None
self._scp_client = None
self._new_config = None
self._old_config = None
self._ssh_usekeys = False
# Netmiko possible arguments
netmiko_argument_map = {
'port': None,
'secret': '',
'verbose': False,
'global_delay_factor': 1,
'use_keys': False,
'key_file': None,
'ssh_strict': False,
'system_host_keys': False,
'alt_host_keys': False,
'alt_key_file': '',
'ssh_config_file': None,
}
fields = netmiko_version.split('.')
fields = [int(x) for x in fields]
maj_ver, min_ver, bug_fix = fields
if maj_ver >= 2:
netmiko_argument_map['allow_agent'] = False
elif maj_ver == 1 and min_ver >= 1:
netmiko_argument_map['allow_agent'] = False
# Build dict of any optional Netmiko args
self.netmiko_optional_args = {}
if optional_args is not None:
for k, v in netmiko_argument_map.items():
try:
self.netmiko_optional_args[k] = optional_args[k]
except KeyError:
pass
self.global_delay_factor = optional_args.get('global_delay_factor', 1)
self.port = optional_args.get('port', 22)
def open(self):
self.device = ConnectHandler(device_type='vyos',
host=self.hostname,
username=self.username,
password=self.password,
**self.netmiko_optional_args)
try:
self._scp_client = SCPConn(self.device)
except:
raise ConnectionException("Failed to open connection ")
def close(self):
self.device.disconnect()
def is_alive(self):
"""Returns a flag with the state of the SSH connection."""
return {
'is_alive': self.device.remote_conn.transport.is_active()
}
def load_replace_candidate(self, filename=None, config=None):
"""
Only configuration files are supported with load_replace_candidate.
It must be a full config file like /config/config.boot
Due to the OS nature, we do not
support a replace using a configuration string.
"""
if not filename and not config:
raise ReplaceConfigException('filename or config param must be provided.')
if filename is None:
temp_file = tempfile.NamedTemporaryFile()
temp_file.write(config)
temp_file.flush()
cfg_filename = temp_file.name
else:
cfg_filename = filename
if os.path.exists(cfg_filename) is True:
self._scp_client.scp_transfer_file(cfg_filename, self._DEST_FILENAME)
self.device.send_command("cp "+self._BOOT_FILENAME+" "+self._BACKUP_FILENAME)
output_loadcmd = self.device.send_config_set(['load '+self._DEST_FILENAME])
match_loaded = re.findall("Load complete.", output_loadcmd)
match_notchanged = re.findall("No configuration changes to commit", output_loadcmd)
match_failed = re.findall("Failed to parse specified config file", output_loadcmd)
if match_failed:
raise ReplaceConfigException("Failed replace config: "
+ output_loadcmd)
if not match_loaded:
if not match_notchanged:
raise ReplaceConfigException("Failed replace config: "
+ output_loadcmd)
else:
raise ReplaceConfigException("config file is not found")
def load_merge_candidate(self, filename=None, config=None):
"""
Only configuration in set-format is supported with load_merge_candidate.
"""
if not filename and not config:
raise MergeConfigException('filename or config param must be provided.')
if filename is None:
temp_file = tempfile.NamedTemporaryFile()
temp_file.write(config)
temp_file.flush()
cfg_filename = temp_file.name
else:
cfg_filename = filename
if os.path.exists(cfg_filename) is True:
with open(cfg_filename) as f:
self.device.send_command("cp "+self._BOOT_FILENAME+" "
+ self._BACKUP_FILENAME)
self._new_config = f.read()
cfg = [x for x in self._new_config.split("\n") if x]
output_loadcmd = self.device.send_config_set(cfg)
match_setfailed = re.findall("Delete failed", output_loadcmd)
match_delfailed = re.findall("Set failed", output_loadcmd)
if match_setfailed or match_delfailed:
raise MergeConfigException("Failed merge config: "
+ output_loadcmd)
else:
raise MergeConfigException("config file is not found")
def discard_config(self):
self.device.exit_config_mode()
def compare_config(self):
output_compare = self.device.send_config_set(['compare'])
match = re.findall("No changes between working and active configurations",
output_compare)
if match:
return ""
else:
diff = ''.join(output_compare.splitlines(True)[1:-1])
return diff
def commit_config(self, message=""):
if message:
raise NotImplementedError(
"Commit message not implemented for this platform"
)
try:
self.device.commit()
except ValueError:
raise CommitError("Failed to commit config on the device")
self.device.send_config_set(['save'])
self.device.exit_config_mode()
def rollback(self):
"""Rollback configuration to filename or to self.rollback_cfg file."""
filename = None
if filename is None:
filename = self._BACKUP_FILENAME
output_loadcmd = self.device.send_config_set(['load '+filename])
match = re.findall("Load complete.", output_loadcmd)
if not match:
raise ReplaceConfigException("Failed rollback config: "
+ output_loadcmd)
else:
self.device.send_config_set(['commit', 'save'])
def get_environment(self):
"""
'vmstat' output:
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 61404 139624 139360 0 0 0 0 9 14 0 0 100 0
"""
output_cpu_list = list()
output_cpu = self.device.send_command("vmstat")
output_cpu = str(output_cpu)
output_cpu_list = output_cpu.split("\n")
if len(output_cpu_list[-1]) > 0:
output_cpu_list = output_cpu_list[-1]
else:
output_cpu_list = output_cpu_list[-2]
output_cpu_idle = output_cpu_list.split()[-2]
cpu = 100 - int(output_cpu_idle)
"""
'free' output:
total used free shared buffers cached
Mem: 508156 446784 61372 0 139624 139360
-/+ buffers/cache: 167800 340356
Swap: 0 0 0
"""
output_ram = self.device.send_command("free").split("\n")[1]
available_ram, used_ram = output_ram.split()[1:3]
environment = {
"fans": {
"invalid": {
"status": False
}
},
"temperature": {
"invalid": {
"temperature": 0.0,
"is_alert": False,
"is_critical": False
}
},
"power": {
"invalid": {
"status": True,
"capacity": 0.0,
"output": 0.0
}
},
"cpu": {
"0": {
"%usage": float(cpu)
},
},
"memory": {
"available_ram": int(available_ram),
"used_ram": int(used_ram)
}
}
return environment
def get_interfaces(self):
"""
"show interfaces" output example:
Interface IP Address S/L Description
--------- ---------- --- -----------
br0 - u/D
eth0 192.168.1.1/24 u/u Management
eth1 192.168.1.2/24 u/u
eth2 192.168.3.1/24 u/u foobar
192.168.2.2/24
lo 127.0.0.1/8 u/u
::1/128
"""
output_iface = self.device.send_command("show interfaces")
# Collect all interfaces' name and status
match = re.findall(r"(\S+)\s+[:\-\d/\.]+\s+([uAD])/([uAD])", output_iface)
# 'match' example:
# [("br0", "u", "D"), ("eth0", "u", "u"), ("eth1", "u", "u")...]
iface_state = {iface_name: {"State": state, "Link": link} for iface_name,
state, link in match}
output_conf = self.device.send_command("show configuration")
# Convert the configuration to dictionary
config = vyattaconfparser.parse_conf(output_conf)
iface_dict = dict()
for iface_type in config["interfaces"]:
ifaces_detail = config["interfaces"][iface_type]
for iface_name in ifaces_detail:
details = ifaces_detail[iface_name]
description = details.get("description", "")
speed = details.get("speed", "0")
if speed == "auto":
speed = 0
hw_id = details.get("hw-id", "00:00:00:00:00:00")
is_up = (iface_state[iface_name]["Link"] == "u")
is_enabled = (iface_state[iface_name]["State"] == "u")
iface_dict.update({
iface_name: {
"is_up": bool(is_up),
"is_enabled": bool(is_enabled),
"description": description,
"last_flapped": float(-1),
"mtu": -1,
"speed": int(speed),
"mac_address": hw_id,
}
})
return iface_dict
def get_arp_table(self, vrf=""):
# 'age' is not implemented yet
"""
'show arp' output example:
Address HWtype HWaddress Flags Mask Iface
10.129.2.254 ether 00:50:56:97:af:b1 C eth0
192.168.1.134 (incomplete) eth1
192.168.1.1 ether 00:50:56:ba:26:7f C eth1
10.129.2.97 ether 00:50:56:9f:64:09 C eth0
192.168.1.3 ether 00:50:56:86:7b:06 C eth1
"""
if vrf:
raise NotImplementedError(
"VRF support has not been added for this getter on this platform."
)
output = self.device.send_command("show arp")
output = output.split("\n")
# Skip the header line
output = output[1:-1]
arp_table = list()
for line in output:
line = line.split()
# 'line' example:
# ["10.129.2.254", "ether", "00:50:56:97:af:b1", "C", "eth0"]
# [u'10.0.12.33', u'(incomplete)', u'eth1']
if "incomplete" in line[1]:
macaddr = "00:00:00:00:00:00"
else:
macaddr = line[2]
arp_table.append(
{
'interface': line[-1],
'mac': macaddr,
'ip': line[0],
'age': 0.0,
}
)
return arp_table
def get_ntp_stats(self):
"""
'ntpq -np' output example
remote refid st t when poll reach delay offset jitter
==============================================================================
116.91.118.97 133.243.238.244 2 u 51 64 377 5.436 987971. 1694.82
219.117.210.137 .GPS. 1 u 17 64 377 17.586 988068. 1652.00
133.130.120.204 133.243.238.164 2 u 46 64 377 7.717 987996. 1669.77
"""
output = self.device.send_command("ntpq -np")
output = output.split("\n")[2:]
ntp_stats = list()
for ntp_info in output:
if len(ntp_info) > 0:
remote, refid, st, t, when, hostpoll, reachability, delay, offset, \
jitter = ntp_info.split()
# 'remote' contains '*' if the machine synchronized with NTP server
synchronized = "*" in remote
match = re.search(r"(\d+\.\d+\.\d+\.\d+)", remote)
ip = match.group(1)
when = when if when != '-' else 0
ntp_stats.append({
"remote": ip,
"referenceid": refid,
"synchronized": bool(synchronized),
"stratum": int(st),
"type": t,
"when": when,
"hostpoll": int(hostpoll),
"reachability": int(reachability),
"delay": float(delay),
"offset": float(offset),
"jitter": float(jitter),
})
return ntp_stats
def get_ntp_peers(self):
output = self.device.send_command("ntpq -np")
output_peers = output.split("\n")[2:]
ntp_peers = dict()
for line in output_peers:
if len(line) > 0:
match = re.search(r"(\d+\.\d+\.\d+\.\d+)\s+", line)
ntp_peers.update({
match.group(1): {}
})
return ntp_peers
def get_bgp_neighbors(self):
# 'description', 'sent_prefixes' and 'received_prefixes' are not implemented yet
"""
'show ip bgp summary' output example:
BGP router identifier 192.168.1.2, local AS number 64520
IPv4 Unicast - max multipaths: ebgp 1 ibgp 1
RIB entries 3, using 288 bytes of memory
Peers 3, using 13 KiB of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
192.168.1.1 4 64519 7226 7189 0 0 0 4d23h40m 1
192.168.1.3 4 64521 7132 7103 0 0 0 4d21h05m 0
192.168.1.4 4 64522 0 0 0 0 0 never Active
"""
output = self.device.send_command("show ip bgp summary")
output = output.split("\n")
match = re.search(r".* router identifier (\d+\.\d+\.\d+\.\d+), local AS number (\d+)",
output[0])
if not match:
return {}
router_id = match.group(1)
local_as = int(match.group(2))
bgp_neighbor_data = dict()
bgp_neighbor_data["global"] = dict()
bgp_neighbor_data["global"]["router_id"] = router_id
bgp_neighbor_data["global"]["peers"] = {}
# delete the header and empty element
bgp_info = [i.strip() for i in output[6:-2] if i]
for i in bgp_info:
if len(i) > 0:
peer_id, bgp_version, remote_as, msg_rcvd, msg_sent, table_version, \
in_queue, out_queue, up_time, state_prefix = i.split()
is_enabled = "(Admin)" not in state_prefix
received_prefixes = None
try:
state_prefix = int(state_prefix)
received_prefixes = int(state_prefix)
is_up = True
except ValueError:
state_prefix = -1
received_prefixes = -1
is_up = False
if bgp_version == "4":
address_family = "ipv4"
elif bgp_version == "6":
address_family = "ipv6"
else:
raise ValueError("BGP neighbor parsing failed")
"""
'show ip bgp neighbors 192.168.1.1' output example:
BGP neighbor is 192.168.1.1, remote AS 64519, local AS 64520, external link
BGP version 4, remote router ID 192.168.1.1
For address family: IPv4 Unicast
~~~
Community attribute sent to this neighbor(both)
1 accepted prefixes
~~~
"""
bgp_detail = self.device.send_command("show ip bgp neighbors %s" % peer_id)
match_rid = re.search(r"remote router ID (\d+\.\d+\.\d+\.\d+).*", bgp_detail)
remote_rid = match_rid.group(1)
match_prefix_accepted = re.search(r"(\d+) accepted prefixes", bgp_detail)
accepted_prefixes = match_prefix_accepted.group(1)
bgp_neighbor_data["global"]["peers"].setdefault(peer_id, {})
peer_dict = {
"description": "",
"is_enabled": bool(is_enabled),
"local_as": int(local_as),
"is_up": bool(is_up),
"remote_id": remote_rid,
"uptime": int(self._bgp_time_conversion(up_time)),
"remote_as": int(remote_as)
}
af_dict = dict()
af_dict[address_family] = {
"sent_prefixes": int(-1),
"accepted_prefixes": int(accepted_prefixes),
"received_prefixes": int(received_prefixes)
}
peer_dict["address_family"] = af_dict
bgp_neighbor_data["global"]["peers"][peer_id] = peer_dict
return bgp_neighbor_data
def _bgp_time_conversion(self, bgp_uptime):
# uptime_letters = set(["y", "w", "h", "d"])
if "never" in bgp_uptime:
return -1
else:
if "y" in bgp_uptime:
match = re.search(r"(\d+)(\w)(\d+)(\w)(\d+)(\w)", bgp_uptime)
uptime = ((int(match.group(1)) * self._YEAR_SECONDS) +
(int(match.group(3)) * self._WEEK_SECONDS) +
(int(match.group(5)) * self._DAY_SECONDS))
return uptime
elif "w" in bgp_uptime:
match = re.search(r"(\d+)(\w)(\d+)(\w)(\d+)(\w)", bgp_uptime)
uptime = ((int(match.group(1)) * self._WEEK_SECONDS) +
(int(match.group(3)) * self._DAY_SECONDS) +
(int(match.group(5)) * self._HOUR_SECONDS))
return uptime
elif "d" in bgp_uptime:
match = re.search(r"(\d+)(\w)(\d+)(\w)(\d+)(\w)", bgp_uptime)
uptime = ((int(match.group(1)) * self._DAY_SECONDS) +
(int(match.group(3)) * self._HOUR_SECONDS) +
(int(match.group(5)) * self._MINUTE_SECONDS))
return uptime
else:
hours, minutes, seconds = map(int, bgp_uptime.split(":"))
uptime = ((hours * self._HOUR_SECONDS) +
(minutes * self._MINUTE_SECONDS) + seconds)
return uptime
def get_lldp_neighbors(self):
# Multiple neighbors per port are not implemented
# The show lldp neighbors commands lists port descriptions, not IDs
output = self.device.send_command("show lldp neighbors detail")
pattern = r'''(?s)Interface: +(?P<interface>\S+), [^\n]+
.+?
+SysName: +(?P<hostname>\S+)
.+?
+PortID: +ifname (?P<port>\S+)'''
def _get_interface(match):
return [
{
'hostname': match.group('hostname'),
'port': match.group('port'),
}
]
return {
match.group('interface'): _get_interface(match)
for match in re.finditer(pattern, output)
}
def get_interfaces_counters(self):
# 'rx_unicast_packet', 'rx_broadcast_packets', 'tx_unicast_packets',
# 'tx_multicast_packets' and 'tx_broadcast_packets' are not implemented yet
"""
'show interfaces detail' output example:
eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
UP group default qlen 1000
link/ether 00:50:56:86:8c:26 brd ff:ff:ff:ff:ff:ff
~~~
RX: bytes packets errors dropped overrun mcast
35960043 464584 0 221 0 407
TX: bytes packets errors dropped carrier collisions
32776498 279273 0 0 0 0
"""
output = self.device.send_command("show interfaces detail")
interfaces = re.findall(r"(\S+): <.*", output)
# count = re.findall("(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+", output)
count = re.findall(r"(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)", output)
counters = dict()
j = 0
for i in count:
if j % 2 == 0:
rx_errors = i[2]
rx_discards = i[3]
rx_octets = i[0]
rx_unicast_packets = i[1]
rx_multicast_packets = i[5]
rx_broadcast_packets = -1
else:
counters.update({
interfaces[j // 2]: {
"tx_errors": int(i[2]),
"tx_discards": int(i[3]),
"tx_octets": int(i[0]),
"tx_unicast_packets": int(i[1]),
"tx_multicast_packets": int(-1),
"tx_broadcast_packets": int(-1),
"rx_errors": int(rx_errors),
"rx_discards": int(rx_discards),
"rx_octets": int(rx_octets),
"rx_unicast_packets": int(rx_unicast_packets),
"rx_multicast_packets": int(rx_multicast_packets),
"rx_broadcast_packets": int(rx_broadcast_packets)
}
})
j += 1
return counters
def get_snmp_information(self):
# 'acl' is not implemented yet
output = self.device.send_command("show configuration")
# convert the configuration to dictionary
config = vyattaconfparser.parse_conf(output)
snmp = dict()
snmp["community"] = dict()
try:
for i in config["service"]["snmp"]["community"]:
snmp["community"].update({
i: {
"acl": "",
"mode": config["service"]["snmp"]["community"][i]["authorization"],
}
})
snmp.update({
"chassis_id": "",
"contact": config["service"]["snmp"]["contact"],
"location": config["service"]["snmp"]["location"],
})
return snmp
except KeyError:
return {}
def get_facts(self):
output_uptime = self.device.send_command("cat /proc/uptime | awk '{print $1}'")
uptime = int(float(output_uptime))
output = self.device.send_command("show version").split("\n")
ver_str = [line for line in output if "Version" in line][0]
version = self.parse_version(ver_str)
above_1_1 = False if version.startswith('1.0') or version.startswith('1.1') else True
if above_1_1:
sn_str = [line for line in output if "Hardware S/N" in line][0]
hwmodel_str = [line for line in output if "Hardware model" in line][0]
else:
sn_str = [line for line in output if "S/N" in line][0]
hwmodel_str = [line for line in output if "HW model" in line][0]
snumber = self.parse_snumber(sn_str)
hwmodel = self.parse_hwmodel(hwmodel_str)
output = self.device.send_command("show configuration")
config = vyattaconfparser.parse_conf(output)
if "host-name" in config["system"]:
hostname = config["system"]["host-name"]
else:
hostname = None
if "domain-name" in config["system"]:
fqdn = config["system"]["domain-name"]
else:
fqdn = ""
iface_list = list()
for iface_type in config["interfaces"]:
for iface_name in config["interfaces"][iface_type]:
iface_list.append(iface_name)
facts = {
"uptime": int(uptime),
"vendor": "VyOS",
"os_version": version,
"serial_number": snumber,
"model": hwmodel,
"hostname": hostname,
"fqdn": fqdn,
"interface_list": iface_list,
}
return facts
@staticmethod
def parse_version(ver_str):
version = ver_str.split()[-1]
return version
@staticmethod
def parse_snumber(sn_str):
sn = sn_str.split(":")
return sn[1].strip()
@staticmethod
def parse_hwmodel(model_str):
model = model_str.split(":")
return model[1].strip()
def get_interfaces_ip(self):
output = self.device.send_command("show interfaces")
output = output.split("\n")
# delete the header line and the interfaces which has no ip address
if len(output[-1]) > 0:
ifaces = [x for x in output[3:] if "-" not in x]
else:
ifaces = [x for x in output[3:-1] if "-" not in x]
ifaces_ip = dict()
for iface in ifaces:
iface = iface.split()
if len(iface) != 1:
iface_name = iface[0]
# Delete the "Interface" column
iface = iface[1:-1]
# Key initialization
ifaces_ip[iface_name] = dict()
ip_addr, mask = iface[0].split("/")
ip_ver = self._get_ip_version(ip_addr)
# Key initialization
if ip_ver not in ifaces_ip[iface_name]:
ifaces_ip[iface_name][ip_ver] = dict()
ifaces_ip[iface_name][ip_ver][ip_addr] = {"prefix_length": int(mask)}
return ifaces_ip
@staticmethod
def _get_ip_version(ip_address):
if ":" in ip_address:
return "ipv6"
elif "." in ip_address:
return "ipv4"
def get_users(self):
output = self.device.send_command("show configuration commands").split("\n")
user_conf = [x.split() for x in output if "login user" in x]
# Collect all users' name
user_name = list(set([x[4] for x in user_conf]))
user_auth = dict()
for user in user_name:
sshkeys = list()
# extract the configuration which relates to 'user'
for line in [x for x in user_conf if user in x]:
# "set system login user alice authentication encrypted-password 'abc'"
if line[6] == "encrypted-password":
password = line[7].strip("'")
# set system login user alice level 'admin'
elif line[5] == "level":
if line[6].strip("'") == "admin":
level = 15
else:
level = 0
# "set system login user alice authentication public-keys
# alice@example.com key 'ABC'"
elif len(line) == 10 and line[8] == "key":
sshkeys.append(line[9].strip("'"))
user_auth.update({
user: {
"level": level,
"password": password,
"sshkeys": sshkeys
}
})
return user_auth
def ping(self,
destination,
source=C.PING_SOURCE,
ttl=C.PING_TTL,
timeout=C.PING_TIMEOUT,
size=C.PING_SIZE,
count=C.PING_COUNT,
vrf=C.PING_VRF):
# does not support multiple destination yet
deadline = timeout * count
command = "ping %s " % destination
command += "ttl %d " % ttl
command += "deadline %d " % deadline
command += "size %d " % size
command += "count %d " % count
if source != "":
command += "interface %s " % source
ping_result = dict()
output_ping = self.device.send_command(command)
if "Unknown host" in output_ping:
err = "Unknown host"
else:
err = ""
if err:
ping_result["error"] = err
else:
# 'packet_info' example:
# ['5', 'packets', 'transmitted,' '5', 'received,' '0%', 'packet',
# 'loss,', 'time', '3997ms']
packet_info = output_ping.split("\n")
if len(packet_info[-1]) > 0:
packet_info = packet_info[-2]
else:
packet_info = packet_info[-3]
packet_info = [x.strip() for x in packet_info.split()]
sent = int(packet_info[0])
received = int(packet_info[3])
lost = sent - received
# 'rtt_info' example:
# ["0.307/0.396/0.480/0.061"]
rtt_info = output_ping.split("\n")
if len(rtt_info[-1]) > 0:
rtt_info = rtt_info[-1]
else:
rtt_info = rtt_info[-2]
match = re.search(r"([\d\.]+)/([\d\.]+)/([\d\.]+)/([\d\.]+)", rtt_info)
if match is not None:
rtt_min = float(match.group(1))
rtt_avg = float(match.group(2))
rtt_max = float(match.group(3))
rtt_stddev = float(match.group(4))
else:
rtt_min = None
rtt_avg = None
rtt_max = None
rtt_stddev = None
ping_result["success"] = dict()
ping_result["success"] = {
"probes_sent": sent,
"packet_loss": lost,
"rtt_min": rtt_min,
"rtt_max": rtt_max,
"rtt_avg": rtt_avg,
"rtt_stddev": rtt_stddev,
"results": [{"ip_address": destination, "rtt": rtt_avg}]
}
return ping_result
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