Remove multiprocessing from PacketVerifier, tune tests.

Change-Id: I37b171c50bad97255a42d6f9426f749055357380
Signed-off-by: Stefan Kobza <skobza@cisco.com>

7 files changed, 20 insertions, 82 deletions

diff --git a/resources/libraries/python/PacketVerifier.py b/resources/libraries/python/PacketVerifier.py
index 54f719fa9a..5c304dcc76 100644
--- a/resources/libraries/python/PacketVerifier.py
+++ b/resources/libraries/python/PacketVerifier.py
@@ -60,11 +60,11 @@
       seq       = 0x0
     ###[ Padding ]###
       load = 'RT\x00\xca]\x0b\xaa\xbb\xcc\xdd\xee\xff\x08\x06\x00\x01\x08\x00'
-    >>> rxq._proc.terminate()
 """
 
 
 import socket
+import select
 import os
 import time
 from multiprocessing import Queue, Process
@@ -186,18 +186,9 @@ def packet_reader(interface_name, queue):
     sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, ETH_P_ALL)
     sock.bind((interface_name, ETH_P_ALL))
 
-    buf = ""
     while True:
-        recvd = sock.recv(1514)
-        buf = buf + recvd
-
-        pkt = extract_one_packet(buf)
-        while pkt is not None:
-            if pkt is None:
-                break
-            queue.put(pkt)
-            buf = buf[len(pkt):]
-            pkt = extract_one_packet(buf)
+        pkt = sock.recv(0x7fff)
+        queue.put(pkt)
 
 
 class RxQueue(PacketVerifier):
@@ -213,12 +204,12 @@ class RxQueue(PacketVerifier):
     def __init__(self, interface_name):
         PacketVerifier.__init__(self, interface_name)
 
-        self._queue = Queue()
-        self._proc = Process(target=packet_reader, args=(interface_name,
-                                                         self._queue))
-        self._proc.daemon = True
-        self._proc.start()
-        time.sleep(2)
+        #self._queue = Queue()
+        #self._proc = Process(target=packet_reader, args=(interface_name,
+        #                                                 self._queue))
+        #self._proc.daemon = True
+        #self._proc.start()
+        #time.sleep(2)
 
     def recv(self, timeout=3, ignore=None):
         """Read next received packet.
@@ -234,7 +225,12 @@ class RxQueue(PacketVerifier):
         :rtype: scapy.Ether
         """
 
-        pkt = self._queue.get(True, timeout=timeout)
+        #pkt = self._queue.get(True, timeout=timeout)
+        (rlist, _, _) = select.select([self._sock], [], [], timeout)
+        if self._sock not in rlist:
+            return None
+
+        pkt = self._sock.recv(0x7fff)
 
         if ignore is not None:
             for i, ig_pkt in enumerate(ignore):
@@ -267,9 +263,7 @@ class TxQueue(PacketVerifier):
         :param pkt: Packet to send.
         :type pkt: string or scapy Packet derivative.
         """
-        if isinstance(pkt, Packet):
-            pkt = str(pkt)
-        pkt = auto_pad(pkt)
+        pkt = auto_pad(str(pkt))
         self._sock.send(pkt)
 
 
@@ -277,8 +271,8 @@ class Interface(object):
     def __init__(self, if_name):
         self.if_name = if_name
         self.sent_packets = []
-        self.txq = TxQueue(if_name)
         self.rxq = RxQueue(if_name)
+        self.txq = TxQueue(if_name)
 
     def send_pkt(self, pkt):
         self.sent_packets.append(pkt)
@@ -288,7 +282,8 @@ class Interface(object):
         return self.rxq.recv(timeout, self.sent_packets)
 
     def close(self):
-        self.rxq._proc.terminate()
+        #self.rxq._proc.terminate()
+        pass
 
 
 def create_gratuitous_arp_request(src_mac, src_ip):
diff --git a/resources/traffic_scripts/icmpv6_echo.py b/resources/traffic_scripts/icmpv6_echo.py
index c3c8d5a381..9e9a952d58 100755
--- a/resources/traffic_scripts/icmpv6_echo.py
+++ b/resources/traffic_scripts/icmpv6_echo.py
@@ -58,18 +58,15 @@ def main():
     # receive ICMPv6 echo reply
     ether = rxq.recv(2, sent_packets)
     if ether is None:
-        rxq._proc.terminate()
         raise RuntimeError('ICMPv6 echo reply Rx timeout')
 
     if not ether.haslayer(IPv6):
-        rxq._proc.terminate()
         raise RuntimeError('Unexpected packet with no IPv6 received {0}'.format(
             ether.__repr__()))
 
     ipv6 = ether['IPv6']
 
     if not ipv6.haslayer(ICMPv6EchoReply):
-        rxq._proc.terminate()
         raise RuntimeError(
             'Unexpected packet with no IPv6 ICMP received {0}'.format(
                 ipv6.__repr__()))
@@ -78,7 +75,6 @@ def main():
 
     # check identifier and sequence number
     if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
-        rxq._proc.terminate()
         raise RuntimeError(
             'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
             'ID {2} seq {3}'.format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
@@ -88,11 +84,9 @@ def main():
     del icmpv6.cksum
     tmp = ICMPv6EchoReply(str(icmpv6))
     if tmp.cksum != cksum:
-        rxq._proc.terminate()
         raise RuntimeError(
             'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
 
-    rxq._proc.terminate()
     sys.exit(0)
 
 if __name__ == "__main__":
diff --git a/resources/traffic_scripts/icmpv6_echo_req_resp.py b/resources/traffic_scripts/icmpv6_echo_req_resp.py
index 24f4faa3f4..48cbda22ae 100755
--- a/resources/traffic_scripts/icmpv6_echo_req_resp.py
+++ b/resources/traffic_scripts/icmpv6_echo_req_resp.py
@@ -73,13 +73,9 @@ def main():
     # receive ICMPv6 echo request on second TG interface
     ether = dst_rxq.recv(2, dst_sent_packets)
     if ether is None:
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError('ICMPv6 echo reply Rx timeout')
 
     if not ether.haslayer(IPv6):
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError('Unexpected packet with no IPv6 received {0}'.format(
             ether.__repr__()))
 
@@ -87,15 +83,11 @@ def main():
 
     # verify hop limit processing
     if ipv6.hlim != (hop_limit - hop_num):
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Invalid hop limit {0} should be {1}'.format(ipv6.hlim,
                                                          hop_limit - hop_num))
 
     if not ipv6.haslayer(ICMPv6EchoRequest):
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Unexpected packet with no IPv6 ICMP received {0}'.format(
                 ipv6.__repr__()))
@@ -104,8 +96,6 @@ def main():
 
     # check identifier and sequence number
     if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
             'ID {2} seq {3}'.format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
@@ -115,8 +105,6 @@ def main():
     del icmpv6.cksum
     tmp = ICMPv6EchoRequest(str(icmpv6))
     if tmp.cksum != cksum:
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
 
@@ -130,13 +118,9 @@ def main():
     # receive ICMPv6 echo reply on first TG interface
     ether = src_rxq.recv(2, src_sent_packets)
     if ether is None:
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError('ICMPv6 echo reply Rx timeout')
 
     if not ether.haslayer(IPv6):
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError('Unexpected packet with no IPv6 received {0}'.format(
             ether.__repr__()))
 
@@ -144,15 +128,11 @@ def main():
 
     # verify hop limit processing
     if ipv6.hlim != (hop_limit - hop_num):
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Invalid hop limit {0} should be {1}'.format(ipv6.hlim,
                                                          hop_limit - hop_num))
 
     if not ipv6.haslayer(ICMPv6EchoReply):
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Unexpected packet with no IPv6 ICMP received {0}'.format(
                 ipv6.__repr__()))
@@ -161,8 +141,6 @@ def main():
 
     # check identifier and sequence number
     if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
             'ID {2} seq {3}'.format(icmpv6.id, icmpv6.seq, echo_id, echo_seq))
@@ -172,13 +150,9 @@ def main():
     del icmpv6.cksum
     tmp = ICMPv6EchoReply(str(icmpv6))
     if tmp.cksum != cksum:
-        src_rxq._proc.terminate()
-        dst_rxq._proc.terminate()
         raise RuntimeError(
             'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
 
-    src_rxq._proc.terminate()
-    dst_rxq._proc.terminate()
     sys.exit(0)
 
 if __name__ == "__main__":
diff --git a/resources/traffic_scripts/ipv4_sweep_ping.py b/resources/traffic_scripts/ipv4_sweep_ping.py
index 4b82a9b03e..5005345250 100755
--- a/resources/traffic_scripts/ipv4_sweep_ping.py
+++ b/resources/traffic_scripts/ipv4_sweep_ping.py
@@ -64,12 +64,10 @@ def main():
 
         ether = rxq.recv(ignore=sent_packets)
         if ether is None:
-            rxq._proc.terminate()
             raise RuntimeError(
                 'ICMP echo reply seq {0} Rx timeout'.format(echo_seq))
 
         if not ether.haslayer(IP):
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Unexpected packet with no IPv4 received {0}'.format(
                     ether.__repr__()))
@@ -77,7 +75,6 @@ def main():
         ipv4 = ether['IP']
 
         if not ipv4.haslayer(ICMP):
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Unexpected packet with no ICMP received {0}'.format(
                     ipv4.__repr__()))
@@ -85,7 +82,6 @@ def main():
         icmpv4 = ipv4['ICMP']
 
         if icmpv4.id != echo_id or icmpv4.seq != echo_seq:
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Invalid ICMP echo reply received ID {0} seq {1} should be ' +
                 'ID {2} seq {3}, {0}'.format(icmpv4.id, icmpv4.seq, echo_id,
@@ -95,17 +91,14 @@ def main():
         del icmpv4.chksum
         tmp = ICMP(str(icmpv4))
         if tmp.chksum != chksum:
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Invalid checksum {0} should be {1}'.format(chksum, tmp.chksum))
         recv_payload_len = ipv4.len - 20 - 8
         load = tmp['Raw'].load[0:recv_payload_len]
         if load != data[0:echo_seq]:
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Received ICMP payload does not match sent payload')
 
-    rxq._proc.terminate()
     sys.exit(0)
 
 if __name__ == "__main__":
diff --git a/resources/traffic_scripts/ipv6_ns.py b/resources/traffic_scripts/ipv6_ns.py
index dd1adad39e..cfdca41ec9 100755
--- a/resources/traffic_scripts/ipv6_ns.py
+++ b/resources/traffic_scripts/ipv6_ns.py
@@ -49,18 +49,15 @@ def main():
     # receive ICMPv6 neighbor advertisement message
     ether = rxq.recv(2, sent_packets)
     if ether is None:
-        rxq._proc.terminate()
         raise RuntimeError('ICMPv6 echo reply Rx timeout')
 
     if not ether.haslayer(IPv6):
-        rxq._proc.terminate()
         raise RuntimeError('Unexpected packet with no IPv6 received {0}'.format(
             ether.__repr__()))
 
     ipv6 = ether['IPv6']
 
     if not ipv6.haslayer(ICMPv6ND_NA):
-        rxq._proc.terminate()
         raise RuntimeError(
             'Unexpected packet with no ICMPv6 ND-NA received {0}'.format(
                 ipv6.__repr__()))
@@ -69,12 +66,10 @@ def main():
 
     # verify target address
     if icmpv6_na.tgt != dst_ip:
-        rxq._proc.terminate()
         raise RuntimeError('Invalid target address {0} should be {1}'.format(
             icmpv6_na.tgt, dst_ip))
 
     if not icmpv6_na.haslayer(ICMPv6NDOptDstLLAddr):
-        rxq._proc.terminate()
         raise RuntimeError(
             'Missing Destination Link-Layer Address option in ICMPv6 ' +
             'Neighbor Advertisement {0}'.format(icmpv6_na.__repr__()))
@@ -84,7 +79,6 @@ def main():
 
     # verify destination link-layer address field
     if dst_ll_addr.lladdr != dst_mac:
-        rxq._proc.terminate()
         raise RuntimeError('Invalid lladdr {0} should be {1}'.format(
             dst_ll_addr.lladdr, dst_mac))
 
@@ -93,11 +87,9 @@ def main():
     del icmpv6_na.cksum
     tmp = ICMPv6ND_NA(str(icmpv6_na))
     if tmp.cksum != cksum:
-        rxq._proc.terminate()
         raise RuntimeError(
             'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
 
-    rxq._proc.terminate()
     sys.exit(0)
 
 if __name__ == "__main__":
diff --git a/resources/traffic_scripts/ipv6_sweep_ping.py b/resources/traffic_scripts/ipv6_sweep_ping.py
index c79b74d760..c1fe7d3f70 100755
--- a/resources/traffic_scripts/ipv6_sweep_ping.py
+++ b/resources/traffic_scripts/ipv6_sweep_ping.py
@@ -68,12 +68,10 @@ def main():
 
         ether = rxq.recv(ignore=sent_packets)
         if ether is None:
-            rxq._proc.terminate()
             raise RuntimeError(
                 'ICMPv6 echo reply seq {0} Rx timeout'.format(echo_seq))
 
         if not ether.haslayer(IPv6):
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Unexpected packet with no IPv6 received {0}'.format(
                     ether.__repr__()))
@@ -81,7 +79,6 @@ def main():
         ipv6 = ether['IPv6']
 
         if not ipv6.haslayer(ICMPv6EchoReply):
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Unexpected packet with no IPv6 ICMP received {0}'.format(
                     ipv6.__repr__()))
@@ -89,7 +86,6 @@ def main():
         icmpv6 = ipv6['ICMPv6 Echo Reply']
 
         if icmpv6.id != echo_id or icmpv6.seq != echo_seq:
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Invalid ICMPv6 echo reply received ID {0} seq {1} should be ' +
                 'ID {2} seq {3}, {0}'.format(icmpv6.id, icmpv6.seq, echo_id,
@@ -99,11 +95,9 @@ def main():
         del icmpv6.cksum
         tmp = ICMPv6EchoReply(str(icmpv6))
         if tmp.cksum != cksum:
-            rxq._proc.terminate()
             raise RuntimeError(
                 'Invalid checksum {0} should be {1}'.format(cksum, tmp.cksum))
 
-    rxq._proc.terminate()
     sys.exit(0)
 
 if __name__ == "__main__":
diff --git a/resources/traffic_scripts/send_ip_icmp.py b/resources/traffic_scripts/send_ip_icmp.py
index fd15376fb1..5e365ebc38 100755
--- a/resources/traffic_scripts/send_ip_icmp.py
+++ b/resources/traffic_scripts/send_ip_icmp.py
@@ -47,24 +47,20 @@ def main():
     sent_packets.append(pkt_raw)
     txq.send(pkt_raw)
 
-    ether = rxq.recv(1)
+    ether = rxq.recv(10)
 
     # Check whether received packet contains layers Ether, IP and ICMP
     if ether is None:
-        rxq._proc.terminate()
         raise RuntimeError('ICMPv6 echo reply Rx timeout')
 
     if not ether.haslayer(IP):
-        rxq._proc.terminate()
         raise RuntimeError(
             'Not an IP packet received {0}'.format(ether.__repr__()))
 
     if not ether.haslayer(ICMP):
-        rxq._proc.terminate()
         raise RuntimeError(
             'Not an ICMP packet received {0}'.format(ether.__repr__()))
 
-    rxq._proc.terminate()
     sys.exit(0)
 
 if __name__ == "__main__":