X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=test%2Fframework.py;h=be8c209f4ea277c2b972f668d87463d8a2f37df6;hb=c8efa29b6f9a91381897b54f1147daf922ed7164;hp=973214503a840303e85e2a0f3059a7d7f5b9a42e;hpb=07a38572caa2c2d2d8658420a7c3df8e7f9d0e74;p=vpp.git

diff --git a/test/framework.py b/test/framework.py
index 973214503a8..be8c209f4ea 100644
--- a/test/framework.py
+++ b/test/framework.py
@@ -25,6 +25,10 @@ from vpp_papi_provider import VppPapiProvider
 from log import RED, GREEN, YELLOW, double_line_delim, single_line_delim, \
     getLogger, colorize
 from vpp_object import VppObjectRegistry
+from util import ppp
+from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
+from scapy.layers.inet6 import ICMPv6DestUnreach, ICMPv6EchoRequest
+from scapy.layers.inet6 import ICMPv6EchoReply
 if os.name == 'posix' and sys.version_info[0] < 3:
     # using subprocess32 is recommended by python official documentation
     # @ https://docs.python.org/2/library/subprocess.html
@@ -32,6 +36,7 @@ if os.name == 'posix' and sys.version_info[0] < 3:
 else:
     import subprocess
 
+
 debug_framework = False
 if os.getenv('TEST_DEBUG', "0") == "1":
     debug_framework = True
@@ -729,6 +734,95 @@ class VppTestCase(unittest.TestCase):
                 name, real_value, expected_min, expected_max)
         self.assertTrue(expected_min <= real_value <= expected_max, msg)
 
+    def assert_packet_checksums_valid(self, packet,
+                                      ignore_zero_udp_checksums=True):
+        received = packet.__class__(str(packet))
+        self.logger.debug(
+            ppp("Verifying packet checksums for packet:", received))
+        udp_layers = ['UDP', 'UDPerror']
+        checksum_fields = ['cksum', 'chksum']
+        checksums = []
+        counter = 0
+        temp = received.__class__(str(received))
+        while True:
+            layer = temp.getlayer(counter)
+            if layer:
+                for cf in checksum_fields:
+                    if hasattr(layer, cf):
+                        if ignore_zero_udp_checksums and \
+                                0 == getattr(layer, cf) and \
+                                layer.name in udp_layers:
+                            continue
+                        delattr(layer, cf)
+                        checksums.append((counter, cf))
+            else:
+                break
+            counter = counter + 1
+        if 0 == len(checksums):
+            return
+        temp = temp.__class__(str(temp))
+        for layer, cf in checksums:
+            calc_sum = getattr(temp[layer], cf)
+            self.assert_equal(
+                getattr(received[layer], cf), calc_sum,
+                "packet checksum on layer #%d: %s" % (layer, temp[layer].name))
+            self.logger.debug(
+                "Checksum field `%s` on `%s` layer has correct value `%s`" %
+                (cf, temp[layer].name, calc_sum))
+
+    def assert_checksum_valid(self, received_packet, layer,
+                              field_name='chksum',
+                              ignore_zero_checksum=False):
+        """ Check checksum of received packet on given layer """
+        received_packet_checksum = getattr(received_packet[layer], field_name)
+        if ignore_zero_checksum and 0 == received_packet_checksum:
+            return
+        recalculated = received_packet.__class__(str(received_packet))
+        delattr(recalculated[layer], field_name)
+        recalculated = recalculated.__class__(str(recalculated))
+        self.assert_equal(received_packet_checksum,
+                          getattr(recalculated[layer], field_name),
+                          "packet checksum on layer: %s" % layer)
+
+    def assert_ip_checksum_valid(self, received_packet,
+                                 ignore_zero_checksum=False):
+        self.assert_checksum_valid(received_packet, 'IP',
+                                   ignore_zero_checksum=ignore_zero_checksum)
+
+    def assert_tcp_checksum_valid(self, received_packet,
+                                  ignore_zero_checksum=False):
+        self.assert_checksum_valid(received_packet, 'TCP',
+                                   ignore_zero_checksum=ignore_zero_checksum)
+
+    def assert_udp_checksum_valid(self, received_packet,
+                                  ignore_zero_checksum=True):
+        self.assert_checksum_valid(received_packet, 'UDP',
+                                   ignore_zero_checksum=ignore_zero_checksum)
+
+    def assert_embedded_icmp_checksum_valid(self, received_packet):
+        if received_packet.haslayer(IPerror):
+            self.assert_checksum_valid(received_packet, 'IPerror')
+        if received_packet.haslayer(TCPerror):
+            self.assert_checksum_valid(received_packet, 'TCPerror')
+        if received_packet.haslayer(UDPerror):
+            self.assert_checksum_valid(received_packet, 'UDPerror',
+                                       ignore_zero_checksum=True)
+        if received_packet.haslayer(ICMPerror):
+            self.assert_checksum_valid(received_packet, 'ICMPerror')
+
+    def assert_icmp_checksum_valid(self, received_packet):
+        self.assert_checksum_valid(received_packet, 'ICMP')
+        self.assert_embedded_icmp_checksum_valid(received_packet)
+
+    def assert_icmpv6_checksum_valid(self, pkt):
+        if pkt.haslayer(ICMPv6DestUnreach):
+            self.assert_checksum_valid(pkt, 'ICMPv6DestUnreach', 'cksum')
+            self.assert_embedded_icmp_checksum_valid(pkt)
+        if pkt.haslayer(ICMPv6EchoRequest):
+            self.assert_checksum_valid(pkt, 'ICMPv6EchoRequest', 'cksum')
+        if pkt.haslayer(ICMPv6EchoReply):
+            self.assert_checksum_valid(pkt, 'ICMPv6EchoReply', 'cksum')
+
     @classmethod
     def sleep(cls, timeout, remark=None):
         if hasattr(cls, 'logger'):