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#!/usr/bin/env python3
# Supporting module for running tests against a running VPP.
# This module is used by the test framework. Do not invoke this module
# directly for running tests against a running vpp. Use run.py for
# running all unit tests.
from glob import glob
import os
import sys
import subprocess
from config import config
def use_running(cls):
"""Update VPPTestCase to use running VPP's sock files & methods.
Arguments:
cls -- VPPTestCase Class
"""
if config.running_vpp:
if os.path.isdir(config.socket_dir):
RunningVPP.socket_dir = config.socket_dir
else:
RunningVPP.socket_dir = RunningVPP.get_default_socket_dir()
RunningVPP.get_set_vpp_sock_files()
cls.get_stats_sock_path = RunningVPP.get_stats_sock_path
cls.get_api_sock_path = RunningVPP.get_api_sock_path
cls.get_memif_sock_path = RunningVPP.get_memif_sock_path
cls.run_vpp = RunningVPP.run_vpp
cls.quit_vpp = RunningVPP.quit_vpp
cls.vpp = RunningVPP
cls.running_vpp = True
return cls
class RunningVPP:
api_sock = "" # api_sock file path
stats_sock = "" # stats sock_file path
memif_sock = "" # memif sock path
socket_dir = "" # running VPP's socket directory
pid = None # running VPP's pid
returncode = None # indicates to the framework that VPP is running
@classmethod
def get_stats_sock_path(cls):
return cls.stats_sock
@classmethod
def get_api_sock_path(cls):
return cls.api_sock
@classmethod
def get_memif_sock_path(cls):
return cls.memif_sock
@classmethod
def run_vpp(cls):
"""VPP is already running -- skip this action."""
pass
@classmethod
def quit_vpp(cls):
"""Indicate quitting to framework by setting returncode=1."""
cls.returncode = 1
@classmethod
def terminate(cls):
"""Indicate termination to framework by setting returncode=1."""
cls.returncode = 1
@classmethod
def get_default_socket_dir(cls):
"""Return running VPP's default socket directory.
Default socket dir is:
/var/run/user/${UID}/vpp (or)
/var/run/vpp, if VPP is started as a root user
"""
if cls.is_running_vpp():
vpp_user_id = (
subprocess.check_output(["ps", "-o", "uid=", "-p", str(cls.pid)])
.decode("utf-8")
.strip()
)
if vpp_user_id == "0":
return "/var/run/vpp"
else:
return f"/var/run/user/{vpp_user_id}/vpp"
else:
print(
"Error: getting default socket dir, as "
"a running VPP process could not be found"
)
sys.exit(1)
@classmethod
def get_set_vpp_sock_files(cls):
"""Look for *.sock files in the socket_dir and set cls attributes.
Returns a tuple: (api_sock_file, stats_sock_file)
Sets cls.api_sock and cls.stats_sock attributes
"""
# Return if the sock files are already set
if cls.api_sock and cls.stats_sock:
return (cls.api_sock, cls.stats_sock)
# Find running VPP's sock files in the socket dir
if os.path.isdir(cls.socket_dir):
if not cls.is_running_vpp():
print(
"Error: The socket dir for a running VPP directory is, "
"set but a running VPP process could not be found"
)
sys.exit(1)
sock_files = glob(os.path.join(cls.socket_dir + "/" + "*.sock"))
for sock_file in sock_files:
if "api.sock" in sock_file:
cls.api_sock = os.path.abspath(sock_file)
elif "stats.sock" in sock_file:
cls.stats_sock = os.path.abspath(sock_file)
elif "memif.sock" in sock_file:
cls.memif_sock = os.path.abspath(sock_file)
if not cls.api_sock:
print(
f"Error: Could not find a valid api.sock file "
f"in running VPP's socket directory {cls.socket_dir}"
)
sys.exit(1)
if not cls.stats_sock:
print(
f"Error: Could not find a valid stats.sock file "
f"in running VPP's socket directory {cls.socket_dir}"
)
sys.exit(1)
return (cls.api_sock, cls.stats_sock)
else:
print("Error: The socket dir for a running VPP directory is unset")
sys.exit(1)
@classmethod
def is_running_vpp(cls):
"""Return True if VPP's pid is visible else False."""
vpp_pid = subprocess.Popen(
["pgrep", "-d,", "-x", "vpp_main"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True,
)
stdout, stderr = vpp_pid.communicate()
cls.pid = int(stdout.split(",")[0]) if stdout else None
return bool(cls.pid)
@classmethod
def poll(cls):
"""Return None to indicate that the process hasn't terminated."""
return cls.returncode
if __name__ == "__main__":
RunningVPP.socket_dir = RunningVPP.get_default_socket_dir()
RunningVPP.get_set_vpp_sock_files()
print(f"Running VPP's sock files")
print(f"api_sock_file {RunningVPP.api_sock}")
print(f"stats_sock_file {RunningVPP.stats_sock}")
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