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# SPDK-License-Identifier: BSD-3-Clause
# Copyright(c) 2018 Intel Corporation
import socket
import os
import sys
import time
BUFFER_SIZE = 200000
METRICS_REQ = "{\"action\":0,\"command\":\"ports_all_stat_values\",\"data\":null}"
API_REG = "{\"action\":1,\"command\":\"clients\",\"data\":{\"client_path\":\""
API_UNREG = "{\"action\":2,\"command\":\"clients\",\"data\":{\"client_path\":\""
DEFAULT_FP = "/var/run/dpdk/default_client"
class Socket:
def __init__(self):
self.send_fd = socket.socket(socket.AF_UNIX, socket.SOCK_SEQPACKET)
self.recv_fd = socket.socket(socket.AF_UNIX, socket.SOCK_SEQPACKET)
self.client_fd = None
def __del__(self):
try:
self.send_fd.close()
self.recv_fd.close()
self.client_fd.close()
except:
print("Error - Sockets could not be closed")
class Client:
def __init__(self): # Creates a client instance
self.socket = Socket()
self.file_path = None
self.choice = None
self.unregistered = 0
def __del__(self):
try:
if self.unregistered == 0:
self.unregister();
except:
print("Error - Client could not be destroyed")
def getFilepath(self, file_path): # Gets arguments from Command-Line and assigns to instance of client
self.file_path = file_path
def register(self): # Connects a client to DPDK-instance
if os.path.exists(self.file_path):
os.unlink(self.file_path)
try:
self.socket.recv_fd.bind(self.file_path)
except socket.error as msg:
print ("Error - Socket binding error: " + str(msg) + "\n")
self.socket.recv_fd.settimeout(2)
self.socket.send_fd.connect("/var/run/dpdk/rte/telemetry")
JSON = (API_REG + self.file_path + "\"}}")
self.socket.send_fd.sendall(JSON)
self.socket.recv_fd.listen(1)
self.socket.client_fd = self.socket.recv_fd.accept()[0]
def unregister(self): # Unregister a given client
self.socket.client_fd.send(API_UNREG + self.file_path + "\"}}")
self.socket.client_fd.close()
def requestMetrics(self): # Requests metrics for given client
self.socket.client_fd.send(METRICS_REQ)
data = self.socket.client_fd.recv(BUFFER_SIZE)
print "\nResponse: \n", str(data)
def repeatedlyRequestMetrics(self, sleep_time): # Recursively requests metrics for given client
print("\nPlease enter the number of times you'd like to continuously request Metrics:")
n_requests = int(input("\n:"))
print("\033[F") #Removes the user input from screen, cleans it up
print("\033[K")
for i in range(n_requests):
self.requestMetrics()
time.sleep(sleep_time)
def interactiveMenu(self, sleep_time): # Creates Interactive menu within the script
while self.choice != 3:
print("\nOptions Menu")
print("[1] Send for Metrics for all ports")
print("[2] Send for Metrics for all ports recursively")
print("[3] Unregister client")
try:
self.choice = int(input("\n:"))
print("\033[F") #Removes the user input for screen, cleans it up
print("\033[K")
if self.choice == 1:
self.requestMetrics()
elif self.choice == 2:
self.repeatedlyRequestMetrics(sleep_time)
elif self.choice == 3:
self.unregister()
self.unregistered = 1
else:
print("Error - Invalid request choice")
except:
pass
if __name__ == "__main__":
sleep_time = 1
file_path = ""
if (len(sys.argv) == 2):
file_path = sys.argv[1]
else:
print("Warning - No filepath passed, using default (" + DEFAULT_FP + ").")
file_path = DEFAULT_FP
client = Client()
client.getFilepath(file_path)
client.register()
client.interactiveMenu(sleep_time)
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