eapol_test: Add an example controller script for RADIUS testing

This new script can be used as an example of load testing for RADIUS
authentication servers. It can control multiple eapol_test processes
over the control interface to run EAP-TLS authentication. As an example,
the following commands would run eight instances of eapol_test
concurrently:

for i in 0 1 2 3 4 5 6 7; do
    ./eapol_test -T /tmp/eapol_test -i $i > eapol_test.log$i &
done

time ./eapol_test.py --ctrl /tmp/eapol_test --num 8 --iter 100
0: PASS 100
1: PASS 100
2: PASS 100
3: PASS 100
4: PASS 100
5: PASS 100
6: PASS 100
7: PASS 100

real	0m0.339s

time ./eapol_test.py --ctrl /tmp/eapol_test --num 8 --iter 100 --no-fast-reauth
0: PASS 100
1: PASS 100
2: PASS 100
3: PASS 100
4: PASS 100
5: PASS 100
6: PASS 100
7: PASS 100

real	0m1.876s

Signed-off-by: Jouni Malinen <j@w1.fi>

wpa_supplicant/eapol_test.py

@@ -0,0 +1,142 @@
+#!/usr/bin/env python2
+#
+# eapol_test controller
+# Copyright (c) 2015, Jouni Malinen <j@w1.fi>
+#
+# This software may be distributed under the terms of the BSD license.
+# See README for more details.
+
+import argparse
+import logging
+import os
+import Queue
+import sys
+import threading
+
+logger = logging.getLogger()
+dir = os.path.dirname(os.path.realpath(sys.modules[__name__].__file__))
+sys.path.append(os.path.join(dir, '..', 'wpaspy'))
+import wpaspy
+wpas_ctrl = '/tmp/eapol_test'
+
+class eapol_test:
+    def __init__(self, ifname):
+        self.ifname = ifname
+        self.ctrl = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
+        if "PONG" not in self.ctrl.request("PING"):
+            raise Exception("Failed to connect to eapol_test (%s)" % ifname)
+        self.mon = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
+        self.mon.attach()
+
+    def add_network(self):
+        id = self.request("ADD_NETWORK")
+        if "FAIL" in id:
+            raise Exception("ADD_NETWORK failed")
+        return int(id)
+
+    def remove_network(self, id):
+        id = self.request("REMOVE_NETWORK " + str(id))
+        if "FAIL" in id:
+            raise Exception("REMOVE_NETWORK failed")
+        return None
+
+    def set_network(self, id, field, value):
+        res = self.request("SET_NETWORK " + str(id) + " " + field + " " + value)
+        if "FAIL" in res:
+            raise Exception("SET_NETWORK failed")
+        return None
+
+    def set_network_quoted(self, id, field, value):
+        res = self.request("SET_NETWORK " + str(id) + " " + field + ' "' + value + '"')
+        if "FAIL" in res:
+            raise Exception("SET_NETWORK failed")
+        return None
+
+    def request(self, cmd, timeout=10):
+        return self.ctrl.request(cmd, timeout=timeout)
+
+    def wait_event(self, events, timeout=10):
+        start = os.times()[4]
+        while True:
+            while self.mon.pending():
+                ev = self.mon.recv()
+                logger.debug(self.ifname + ": " + ev)
+                for event in events:
+                    if event in ev:
+                        return ev
+            now = os.times()[4]
+            remaining = start + timeout - now
+            if remaining <= 0:
+                break
+            if not self.mon.pending(timeout=remaining):
+                break
+        return None
+
+def run(ifname, count, no_fast_reauth, res):
+    et = eapol_test(ifname)
+
+    et.request("AP_SCAN 0")
+    if no_fast_reauth:
+        et.request("SET fast_reauth 0")
+    else:
+        et.request("SET fast_reauth 1")
+    id = et.add_network()
+    et.set_network(id, "key_mgmt", "IEEE8021X")
+    et.set_network(id, "eapol_flags", "0")
+    et.set_network(id, "eap", "TLS")
+    et.set_network_quoted(id, "identity", "user")
+    et.set_network_quoted(id, "ca_cert", 'ca.pem')
+    et.set_network_quoted(id, "client_cert", 'client.pem')
+    et.set_network_quoted(id, "private_key", 'client.key')
+    et.set_network_quoted(id, "private_key_passwd", 'whatever')
+    et.set_network(id, "disabled", "0")
+
+    fail = False
+    for i in range(count):
+        et.request("REASSOCIATE")
+        ev = et.wait_event(["CTRL-EVENT-CONNECTED", "CTRL-EVENT-EAP-FAILURE"])
+        if ev is None or "CTRL-EVENT-CONNECTED" not in ev:
+            fail = True
+            break
+
+    et.remove_network(id)
+
+    if fail:
+        res.put("FAIL (%d OK)" % i)
+    else:
+        res.put("PASS %d" % (i + 1))
+
+def main():
+    parser = argparse.ArgumentParser(description='eapol_test controller')
+    parser.add_argument('--ctrl', help='control interface directory')
+    parser.add_argument('--num', help='number of processes')
+    parser.add_argument('--iter', help='number of iterations')
+    parser.add_argument('--no-fast-reauth', action='store_true',
+                        dest='no_fast_reauth',
+                        help='disable TLS session resumption')
+    args = parser.parse_args()
+
+    num = int(args.num)
+    iter = int(args.iter)
+    if args.ctrl:
+        global wpas_ctrl
+        wpas_ctrl = args.ctrl
+
+    t = {}
+    res = {}
+    for i in range(num):
+        res[i] = Queue.Queue()
+        t[i] = threading.Thread(target=run, args=(str(i), iter,
+                                                  args.no_fast_reauth, res[i]))
+    for i in range(num):
+        t[i].start()
+    for i in range(num):
+        t[i].join()
+        try:
+            results = res[i].get(False)
+        except:
+            results = "N/A"
+        print "%d: %s" % (i, results)
+
+if __name__ == "__main__":
+    main()