Adding upstream version 1:9.18.19.upstream/1%9.18.19

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 212 insertions, 0 deletions

diff --git a/bin/tests/system/pipelined/ans5/ans.py b/bin/tests/system/pipelined/ans5/ans.py
new file mode 100644
index 0000000..bac5ed3
--- /dev/null
+++ b/bin/tests/system/pipelined/ans5/ans.py
@@ -0,0 +1,212 @@
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# SPDX-License-Identifier: MPL-2.0
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0.  If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+############################################################################
+#
+# This tool acts as a TCP/UDP proxy and delays all incoming packets by 500
+# milliseconds.
+#
+# We use it to check pipelining - a client sents 8 questions over a
+# pipelined connection - that require asking a normal (examplea) and a
+# slow-responding (exampleb) servers:
+# a.examplea
+# a.exampleb
+# b.examplea
+# b.exampleb
+# c.examplea
+# c.exampleb
+# d.examplea
+# d.exampleb
+#
+# If pipelining works properly the answers will be returned out of order
+# with all answers from examplea returned first, and then all answers
+# from exampleb.
+#
+############################################################################
+
+from __future__ import print_function
+
+import datetime
+import os
+import select
+import signal
+import socket
+import sys
+import time
+import threading
+import struct
+
+DELAY = 0.5
+THREADS = []
+
+
+def log(msg):
+    print(datetime.datetime.now().strftime("%d-%b-%Y %H:%M:%S.%f ") + msg)
+
+
+def sigterm(*_):
+    log("SIGTERM received, shutting down")
+    for thread in THREADS:
+        thread.close()
+        thread.join()
+    os.remove("ans.pid")
+    sys.exit(0)
+
+
+class TCPDelayer(threading.Thread):
+    """For a given TCP connection conn we open a connection to (ip, port),
+    and then we delay each incoming packet by DELAY by putting it in a
+    queue.
+    In the pipelined test TCP should not be used, but it's here for
+    completnes.
+    """
+
+    def __init__(self, conn, ip, port):
+        threading.Thread.__init__(self)
+        self.conn = conn
+        self.cconn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.cconn.connect((ip, port))
+        self.queue = []
+        self.running = True
+
+    def close(self):
+        self.running = False
+
+    def run(self):
+        while self.running:
+            curr_timeout = 0.5
+            try:
+                curr_timeout = self.queue[0][0] - time.time()
+            except StopIteration:
+                pass
+            if curr_timeout > 0:
+                if curr_timeout == 0:
+                    curr_timeout = 0.5
+                rfds, _, _ = select.select(
+                    [self.conn, self.cconn], [], [], curr_timeout
+                )
+                if self.conn in rfds:
+                    data = self.conn.recv(65535)
+                    if not data:
+                        return
+                    self.queue.append((time.time() + DELAY, data))
+                if self.cconn in rfds:
+                    data = self.cconn.recv(65535)
+                    if not data == 0:
+                        return
+                    self.conn.send(data)
+            try:
+                while self.queue[0][0] - time.time() < 0:
+                    _, data = self.queue.pop(0)
+                    self.cconn.send(data)
+            except StopIteration:
+                pass
+
+
+class UDPDelayer(threading.Thread):
+    """Every incoming UDP packet is put in a queue for DELAY time, then
+    it's sent to (ip, port). We remember the query id to send the
+    response we get to a proper source, responses are not delayed.
+    """
+
+    def __init__(self, usock, ip, port):
+        threading.Thread.__init__(self)
+        self.sock = usock
+        self.csock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self.dst = (ip, port)
+        self.queue = []
+        self.qid_mapping = {}
+        self.running = True
+
+    def close(self):
+        self.running = False
+
+    def run(self):
+        while self.running:
+            curr_timeout = 0.5
+            if self.queue:
+                curr_timeout = self.queue[0][0] - time.time()
+            if curr_timeout >= 0:
+                if curr_timeout == 0:
+                    curr_timeout = 0.5
+                rfds, _, _ = select.select(
+                    [self.sock, self.csock], [], [], curr_timeout
+                )
+                if self.sock in rfds:
+                    data, addr = self.sock.recvfrom(65535)
+                    if not data:
+                        return
+                    self.queue.append((time.time() + DELAY, data))
+                    qid = struct.unpack(">H", data[:2])[0]
+                    log("Received a query from %s, queryid %d" % (str(addr), qid))
+                    self.qid_mapping[qid] = addr
+                if self.csock in rfds:
+                    data, addr = self.csock.recvfrom(65535)
+                    if not data:
+                        return
+                    qid = struct.unpack(">H", data[:2])[0]
+                    dst = self.qid_mapping.get(qid)
+                    if dst is not None:
+                        self.sock.sendto(data, dst)
+                        log(
+                            "Received a response from %s, queryid %d, sending to %s"
+                            % (str(addr), qid, str(dst))
+                        )
+            while self.queue and self.queue[0][0] - time.time() < 0:
+                _, data = self.queue.pop(0)
+                qid = struct.unpack(">H", data[:2])[0]
+                log("Sending a query to %s, queryid %d" % (str(self.dst), qid))
+                self.csock.sendto(data, self.dst)
+
+
+def main():
+    signal.signal(signal.SIGTERM, sigterm)
+    signal.signal(signal.SIGINT, sigterm)
+
+    with open("ans.pid", "w") as pidfile:
+        print(os.getpid(), file=pidfile)
+
+    listenip = "10.53.0.5"
+    serverip = "10.53.0.2"
+
+    try:
+        port = int(os.environ["PORT"])
+    except KeyError:
+        port = 5300
+
+    log("Listening on %s:%d" % (listenip, port))
+
+    usock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    usock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    usock.bind((listenip, port))
+    thread = UDPDelayer(usock, serverip, port)
+    thread.start()
+    THREADS.append(thread)
+
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    sock.bind((listenip, port))
+    sock.listen(1)
+    sock.settimeout(1)
+
+    while True:
+        try:
+            (clientsock, _) = sock.accept()
+            log("Accepted connection from %s" % clientsock)
+            thread = TCPDelayer(clientsock, serverip, port)
+            thread.start()
+            THREADS.append(thread)
+        except socket.timeout:
+            pass
+
+
+if __name__ == "__main__":
+    main()