Merge branch 'scapy_service_gui_updates' of git://github.com/kisel/trex-core into kisel-scapy_service_gui_updates

5 files changed, 483 insertions, 23 deletions

diff --git a/scripts/automation/trex_control_plane/stl/services/scapy_server/protocols.json b/scripts/automation/trex_control_plane/stl/services/scapy_server/protocols.json
new file mode 100644
index 00000000..f685c06f
--- /dev/null
+++ b/scripts/automation/trex_control_plane/stl/services/scapy_server/protocols.json
@@ -0,0 +1,194 @@
+[
+  {
+    "id": "Ether",
+    "name": "Ethernet II",
+    "fields": [
+      {
+        "id": "dst",
+        "name": "Destination",
+        "type": "MAC_ADDRESS",
+        "regex": "^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$"
+      },
+      {
+        "id": "src",
+        "name": "Source",
+        "type": "MAC_ADDRESS",
+        "regex": "^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$"
+      },
+      {
+        "id": "type",
+        "name": "Type"
+      }
+    ],
+    "payload": ["IP", "IPv6", "Dot1Q", "Raw"]
+  },
+  {
+    "id": "IP",
+    "name": "IPv4",
+    "fields": [
+      {
+        "id": "version",
+        "name": "Version"
+      },
+      {
+        "id": "ihl",
+        "name": "IHL",
+        "type": "NUMBER",
+        "auto": true
+      },
+      {
+        "id": "tos",
+        "name": "TOS",
+        "type": "NUMBER"
+      },
+      {
+        "id": "len",
+        "name": "Total Length",
+        "type": "NUMBER",
+        "auto": true
+      },
+      {
+        "id": "id",
+        "name": "Identification",
+        "type": "NUMBER"
+      },
+      {
+        "id": "flags",
+        "name": "Flags",
+        "type": "BITMASK",
+        "bits": [
+          {"name": "Reserved", "mask": 4, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 4}]},
+          {"name": "Fragment", "mask": 2, "values":[{"name":"May fragment (0)", "value": 0}, {"name":"Don't fragment (1)", "value": 2}]},
+          {"name": "More Fragments(MF)", "mask": 1, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 1}]}
+        ]
+      },
+      {
+        "id": "frag",
+        "name": "Fragment offset",
+        "type": "NUMBER"
+      },
+      {
+        "id": "ttl",
+        "name": "TTL",
+        "type": "NUMBER",
+        "min": 1,
+        "max": 255
+        
+      },
+      {
+        "id": "proto",
+        "name": "Protocol"
+      },
+      {
+        "id": "chksum",
+        "name": "Checksum",
+        "type": "STRING",
+        "auto": true
+      },
+      {
+        "id": "src",
+        "name": "Source address",
+        "type": "IP_ADDRESS"
+      },
+      {
+        "id": "dst",
+        "name": "Destination address",
+        "type": "IP_ADDRESS"
+      },
+      {
+        "id": "options",
+        "name": "Options",
+        "type": "IP_OPTIONS"
+      }
+    ],
+    "payload": ["TCP", "UDP", "ICMP", "Raw"]
+  },
+  {
+    "id": "TCP",
+    "name": "TCP",
+    "fields": [
+      {
+        "id": "sport",
+        "name": "Source port",
+        "type": "NUMBER",
+        "min": 0,
+        "max": 65535
+        
+      },
+      {
+        "id": "dport",
+        "name": "Destination port",
+        "type": "NUMBER",
+        "min": 0,
+        "max": 65535
+      },
+      {
+        "id": "seq",
+        "name": "Sequence number",
+        "type": "NUMBER"
+      },
+      {
+        "id": "ack",
+        "name": "Acknowledgment number",
+        "type": "NUMBER"
+      },
+      {
+        "id": "dataofs",
+        "name": "Data offset",
+        "type": "NUMBER"
+      },
+      {
+        "id": "reserved",
+        "name": "Reserved",
+        "type": "NUMBER"
+      },
+      {
+        "id": "flags",
+        "name": "Flags",
+        "auto": false,
+        "type": "BITMASK",
+        "bits": [
+          {"name": "URG", "mask": 32, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 32}]},
+          {"name": "ACK", "mask": 16, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 16}]},
+          {"name": "PSH", "mask": 8, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 8}]},
+          {"name": "RST", "mask": 4, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 4}]},
+          {"name": "SYN", "mask": 2, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 2}]},
+          {"name": "FIN", "mask": 1, "values":[{"name":"Not Set", "value": 0}, {"name":"Set", "value": 1}]}
+        ]
+      },
+      {
+        "id": "window",
+        "name": "Window size",
+        "type": "NUMBER"
+      },
+      {
+        "id": "chksum",
+        "name": "Checksum",
+        "auto": true,
+        "type": "NUMBER"
+      },
+      {
+        "id": "urgptr",
+        "name": "Urgent pointer",
+        "type": "NUMBER"
+      },
+      {
+        "id": "options",
+        "name": "Options",
+        "type": "TCP_OPTIONS"
+      }
+    ]
+  },
+  {
+    "id": "Raw",
+    "name": "Raw",
+    "fields": [
+      {
+        "id": "load",
+        "name": "Payload",
+        "type": "BYTES"
+      }
+    ]
+  }
+]
+
diff --git a/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_service.py b/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_service.py
index 91257596..88514aa8 100755
--- a/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_service.py
+++ b/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_service.py
@@ -9,6 +9,7 @@ import tempfile
 import hashlib
 import base64
 import numbers
+import random
 import inspect
 import json
 from pprint import pprint
@@ -279,6 +280,64 @@ def get_sample_field_val(scapy_layer, fieldId):
     except:
         pass
 
+def generate_random_bytes(sz, seed, start, end):
+    # generate bytes of specified range with a fixed seed and size
+    rnd = random.Random()
+    n = end - start + 1
+    if is_python(2):
+        rnd = random.Random(seed)
+        res = [start + int(rnd.random()*n) for _i in range(sz)]
+        return ''.join(chr(x) for x in res)
+    else:
+        rnd = random.Random()
+        # to generate same random sequence as 2.x
+        rnd.seed(seed, version=1)
+        res = [start + int(rnd.random()*n) for _i in range(sz)]
+        return bytes(res)
+
+def generate_bytes_from_template(sz, template):
+    # generate bytes by repeating a template
+    res = str_to_bytes('') # new bytes array
+    if len(template) == 0:
+        return res
+    while len(res) < sz:
+        res = res + template
+    return res[:sz]
+
+def parse_template_code(template_code):
+    template_code = re.sub("0[xX]", '', template_code) # remove 0x
+    template_code = re.sub("[\s]", '', template_code) # remove spaces
+    return bytearray.fromhex(template_code)
+
+def verify_payload_size(size):
+    assert(size != None)
+    if (size > (1<<20)): # 1Mb ought to be enough for anybody
+        raise ValueError('size is too large')
+
+def generate_bytes(bytes_definition):
+    # accepts a bytes definition object
+    # {generate: random_bytes or random_ascii, seed: <seed_number>, size: <size_bytes>}
+    # {generate: template, template_base64: '<base64str>',  size: <size_bytes>}
+    # {generate: template_code, template_text_code: '<template_code_str>',  size: <size_bytes>}
+    gen_type = bytes_definition.get('generate')
+    if gen_type == None:
+        return b64_to_bytes(bytes_definition['base64'])
+    elif gen_type == 'template_code':
+        code = parse_template_code(bytes_definition["template_code"])
+        bytes_size = int(bytes_definition.get('size') or len(code))
+        verify_payload_size(bytes_size)
+        return generate_bytes_from_template(bytes_size, code)
+    else:
+        bytes_size = int(bytes_definition['size']) # required
+        seed = int(bytes_definition.get('seed') or 12345) # optional
+        verify_payload_size(bytes_size)
+        if gen_type == 'random_bytes':
+            return generate_random_bytes(bytes_size, seed, 0, 0xFF)
+        elif gen_type == 'random_ascii':
+            return generate_random_bytes(bytes_size, seed, 0x20, 0x7E)
+        elif gen_type == 'template':
+            return generate_bytes_from_template(bytes_size, b64_to_bytes(bytes_definition["template_base64"]))
+
 class ScapyException(Exception): pass
 class Scapy_service(Scapy_service_api):
 
@@ -312,7 +371,16 @@ class Scapy_service(Scapy_service_api):
         self.version_major = '1'
         self.version_minor = '01'
         self.server_v_hashed = self._generate_version_hash(self.version_major,self.version_minor)
-    
+        self.protocol_definitions = {} # protocolId -> prococol definition overrides data
+        self._load_definitions_from_json()
+
+    def _load_definitions_from_json(self):
+        # load protocol definitions from a json file
+        self.protocol_definitions = {}
+        with open('protocols.json', 'r') as f:
+            protocols = json.load(f)
+            for protocol in protocols:
+                self.protocol_definitions[ protocol['id'] ] = protocol
 
     def _all_protocol_structs(self):
         old_stdout = sys.stdout
@@ -370,9 +438,9 @@ class Scapy_service(Scapy_service_api):
         if type(val) == type({}):
             value_type = val['vtype']
             if value_type == 'EXPRESSION':
-                return eval(val['expr'], {})
+                return eval(val['expr'], scapy.all.__dict__)
             elif value_type == 'BYTES':   # bytes payload(ex Raw.load)
-                return b64_to_bytes(val['base64'])
+                return generate_bytes(val)
             elif value_type == 'OBJECT':
                 return val['value']
             else:
@@ -382,7 +450,7 @@ class Scapy_service(Scapy_service_api):
         else:
             return val
 
-    def _field_value_from_def(self, layer, fieldId, val):
+    def _field_value_from_def(self, scapy_pkt, layer, fieldId, val):
         field_desc = layer.get_field(fieldId)
         sample_val = get_sample_field_val(layer, fieldId)
         # extensions for field values
@@ -394,6 +462,16 @@ class Scapy_service(Scapy_service_api):
                 return field_desc.randval()
             elif value_type == 'MACHINE': # internal machine field repr
                 return field_desc.m2i(layer, b64_to_bytes(val['base64']))
+            elif value_type == 'BYTES':
+                if 'total_size' in val: # custom case for total pkt size
+                    gen = {}
+                    gen.update(val)
+                    total_sz = gen['total_size']
+                    del gen['total_size']
+                    gen['size'] = total_sz - len(scapy_pkt)
+                    return generate_bytes(gen)
+                else:
+                    return generate_bytes(val)
         if is_number(sample_val) and is_string(val):
             # human-value. guess the type and convert to internal value
             # seems setfieldval already does this for some fields,
@@ -583,22 +661,24 @@ class Scapy_service(Scapy_service_api):
     def _verify_version_handler(self,client_v_handler):
         return (self.server_v_hashed == client_v_handler)
 
-    def _parse_packet_dict(self,layer,scapy_layers,scapy_layer_names):
-        class_name = scapy_layer_names.index(layer['id'])
-        class_p = scapy_layers[class_name] # class pointer
+    def _parse_packet_dict(self, layer, layer_classes, base_layer):
+        class_p = layer_classes[layer['id']] # class id -> class dict
         scapy_layer = class_p()
         if isinstance(scapy_layer, Raw):
             scapy_layer.load = str_to_bytes("dummy")
+        if base_layer == None:
+            base_layer = scapy_layer
         if 'fields' in layer:
-            self._modify_layer(scapy_layer, layer['fields'])
+            self._modify_layer(base_layer, scapy_layer, layer['fields'])
         return scapy_layer
 
     def _packet_model_to_scapy_packet(self,data):
-        layers = Packet.__subclasses__()
-        layer_names = [ layer.__name__ for layer in layers]
-        base_layer = self._parse_packet_dict(data[0],layers,layer_names)
+        layer_classes = {}
+        for layer_class in Packet.__subclasses__():
+            layer_classes[layer_class.__name__] = layer_class
+        base_layer = self._parse_packet_dict(data[0], layer_classes, None)
         for i in range(1,len(data),1):
-            packet_layer = self._parse_packet_dict(data[i],layers,layer_names)
+            packet_layer = self._parse_packet_dict(data[i], layer_classes, base_layer)
             base_layer = base_layer/packet_layer
         return base_layer
 
@@ -654,10 +734,9 @@ class Scapy_service(Scapy_service_api):
             return pkt_class()
 
         
-    def _get_payload_classes(self, pkt):
+    def _get_payload_classes(self, pkt_class):
         # tries to find, which subclasses allowed.
         # this can take long time, since it tries to build packets with all subclasses(O(N))
-        pkt_class = type(pkt)
         allowed_subclasses = []
         for pkt_subclass in conf.layers:
             if self._is_packet_class(pkt_subclass):
@@ -671,16 +750,29 @@ class Scapy_service(Scapy_service_api):
                     pass
         return allowed_subclasses
 
-    def _get_fields_definition(self, pkt_class):
+    def _get_fields_definition(self, pkt_class, fieldsDef):
+        # fieldsDef - array of field definitions(or empty array)
         fields = []
         for field_desc in pkt_class.fields_desc:
+            fieldId = field_desc.name
             field_data = {
-                    "id": field_desc.name,
+                    "id": fieldId,
                     "name": field_desc.name
             }
+            for fieldDef in fieldsDef:
+                if fieldDef['id'] == fieldId:
+                    field_data.update(fieldDef)
             if isinstance(field_desc, EnumField):
                 try:
                     field_data["values_dict"] = field_desc.s2i
+                    if field_data.get("type") == None:
+                        if len(field_data["values_dict"] > 0):
+                            field_data["type"] = "ENUM"
+                        elif fieldId == 'load':
+                            field_data["type"] = "BYTES"
+                        else:
+                            field_data["type"] = "STRING"
+                    field_data["values_dict"] = field_desc.s2i
                 except:
                     # MultiEnumField doesn't have s2i. need better handling
                     pass
@@ -696,17 +788,23 @@ class Scapy_service(Scapy_service_api):
         for pkt_class in all_classes:
             if self._is_packet_class(pkt_class):
                 # enumerate all non-abstract Packet classes
+                protocolId = pkt_class.__name__
+                protoDef = self.protocol_definitions.get(protocolId) or {}
                 protocols.append({
-                    "id": pkt_class.__name__,
-                    "name": pkt_class.name,
-                    "fields": self._get_fields_definition(pkt_class)
+                    "id": protocolId,
+                    "name": protoDef.get('name') or pkt_class.name,
+                    "fields": self._get_fields_definition(pkt_class, protoDef.get('fields') or [])
                     })
         res = {"protocols": protocols}
         return res
 
     def get_payload_classes(self,client_v_handler, pkt_model_descriptor):
         pkt = self._packet_model_to_scapy_packet(pkt_model_descriptor)
-        return [c.__name__ for c in self._get_payload_classes(pkt)]
+        pkt_class = type(pkt.lastlayer())
+        protocolDef = self.protocol_definitions.get(pkt_class.__name__)
+        if protocolDef and protocolDef.get('payload'):
+            return protocolDef['payload']
+        return [c.__name__ for c in self._get_payload_classes(pkt_class)]
 
 #input in string encoded base64
     def check_update_of_dbs(self,client_v_handler,db_md5,field_md5):
@@ -725,10 +823,10 @@ class Scapy_service(Scapy_service_api):
         else:
             raise ScapyException("Fields DB is not up to date")
 
-    def _modify_layer(self, scapy_layer, fields):
+    def _modify_layer(self, scapy_pkt, scapy_layer, fields):
         for field in fields:
             fieldId = str(field['id'])
-            fieldval = self._field_value_from_def(scapy_layer, fieldId, field['value'])
+            fieldval = self._field_value_from_def(scapy_pkt, scapy_layer, fieldId, field['value'])
             if fieldval is not None:
                 scapy_layer.setfieldval(fieldId, fieldval)
             else:
@@ -767,7 +865,7 @@ class Scapy_service(Scapy_service_api):
                 # TODO: support replacing payload, instead of breaking
                 raise ScapyException("Protocol id inconsistent")
             if 'fields' in model_layer:
-                self._modify_layer(scapy_layer, model_layer['fields'])
+                self._modify_layer(scapy_pkt, scapy_layer, model_layer['fields'])
         return self._pkt_data(scapy_pkt)
 
     def read_pcap(self,client_v_handler,pcap_base64):
diff --git a/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/basetest.py b/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/basetest.py
index 17dd304a..1db2c62b 100644
--- a/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/basetest.py
+++ b/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/basetest.py
@@ -62,6 +62,9 @@ def reconstruct_pkt(bytes_b64, model_def):
 def get_definitions(def_filter):
     return pass_result(service.get_definitions(v_handler, def_filter))
 
+def get_definition_of(scapy_classname):
+    return pass_result(service.get_definitions(v_handler, [scapy_classname]))['protocols'][0]
+
 def get_payload_classes(def_filter):
     return pass_result(service.get_payload_classes(v_handler, def_filter))
 
diff --git a/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/test_scapy_service.py b/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/test_scapy_service.py
index 9cd473d7..d1207ca5 100644
--- a/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/test_scapy_service.py
+++ b/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/test_scapy_service.py
@@ -78,6 +78,35 @@ def test_build_Raw():
         ])
     assert(str(pkt[Raw].load == "hi"))
 
+def test_build_fixed_pkt_size_bytes_gen():
+    pkt = build_pkt_get_scapy([
+        layer_def("Ether"),
+        layer_def("IP"),
+        layer_def("TCP"),
+        layer_def("Raw", load={
+            "vtype": "BYTES",
+            "generate": "template",
+            "total_size": 64,
+            "template_base64": bytes_to_b64(b"hi")
+        })
+        ])
+    print(len(pkt))
+    assert(len(pkt) == 64)
+
+def test_build_fixed_pkt_size_bytes_gen():
+    pkt = build_pkt_get_scapy([
+        layer_def("Ether"),
+        layer_def("IP"),
+        layer_def("TCP"),
+        layer_def("Raw", load={
+            "vtype": "BYTES",
+            "generate": "random_ascii",
+            "total_size": 256
+        })
+        ])
+    print(len(pkt))
+    assert(len(pkt) == 256)
+
 def test_get_all():
     service.get_all(v_handler)
 
@@ -98,6 +127,16 @@ def test_get_payload_classes():
     assert("IP" in eth_payloads)
     assert("Dot1Q" in eth_payloads)
     assert("TCP" not in eth_payloads)
+    assert(eth_payloads[0] == "IP") # order(based on prococols.json)
+
+def test_get_tcp_payload_classes():
+    payloads = get_payload_classes([{"id":"TCP"}])
+    assert("Raw" in payloads)
+
+def test_get_dot1q_payload_classes():
+    payloads = get_payload_classes([{"id":"Dot1Q"}])
+    assert("Dot1Q" in payloads)
+    assert("IP" in payloads)
 
 def test_pcap_read_and_write():
     pkts_to_write = [bytes_to_b64(bytes(TEST_PKT))]
@@ -120,6 +159,28 @@ def test_layer_random_value():
     ether_fields = fields_to_map(res['data'][0]['fields'])
     assert(re.match(RE_MAC, ether_fields['src']['value']))
 
+def test_IP_options():
+    options_expr = "[IPOption_SSRR(copy_flag=0, routers=['1.2.3.4', '5.6.7.8'])]"
+    res = build_pkt([
+        layer_def("Ether"),
+        layer_def("IP", options={"vtype": "EXPRESSION", "expr": options_expr}),
+        ])
+    pkt = build_pkt_to_scapy(res)
+    options = pkt[IP].options
+    assert(options[0].__class__.__name__ == 'IPOption_SSRR')
+    assert(options[0].copy_flag == 0)
+    assert(options[0].routers == ['1.2.3.4', '5.6.7.8'])
+
+def test_TCP_options():
+    options_expr = "[('MSS', 1460), ('NOP', None), ('NOP', None), ('SAckOK', b'')]"
+    pkt = build_pkt_get_scapy([
+        layer_def("Ether"),
+        layer_def("IP"),
+        layer_def("TCP", options={"vtype": "EXPRESSION", "expr": options_expr}),
+        ])
+    options = pkt[TCP].options
+    assert(options[0] == ('MSS', 1460) )
+
 def test_layer_wrong_structure():
     payload = [
             layer_def("Ether"),
@@ -153,3 +214,38 @@ def test_layer_wrong_structure():
     assert(real_structure == ["Ether", "IP", "Raw", None, None])
     assert(valid_structure_flags == [True, True, True, False, False])
 
+def test_ether_definitions():
+    etherDef = get_definition_of("Ether")
+    assert(etherDef['name'] == "Ethernet II")
+    etherFields = etherDef['fields']
+    assert(etherFields[0]['id'] == 'dst')
+    assert(etherFields[0]['name'] == 'Destination')
+    assert(etherFields[1]['id'] == 'src')
+    assert(etherFields[1]['name'] == 'Source')
+    assert(etherFields[2]['id'] == 'type')
+    assert(etherFields[2]['name'] == 'Type')
+
+def test_ether_definitions():
+    pdef = get_definition_of("ICMP")
+    assert(pdef['id'] == "ICMP")
+    assert(pdef['name'])
+    assert(pdef['fields'])
+
+def test_ip_definitions():
+    pdef = get_definition_of("IP")
+    fields = pdef['fields']
+    assert(fields[0]['id'] == 'version')
+
+    assert(fields[1]['id'] == 'ihl')
+    assert(fields[1]['auto'] == True)
+
+    assert(fields[3]['id'] == 'len')
+    assert(fields[3]['auto'] == True)
+
+    assert(fields[5]['id'] == 'flags')
+    assert(fields[5]['type'] == 'BITMASK')
+    assert(fields[5]['bits'][0]['name'] == 'Reserved')
+
+    assert(fields[9]['id'] == 'chksum')
+    assert(fields[9]['auto'] == True)
+
diff --git a/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/test_utils.py b/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/test_utils.py
new file mode 100644
index 00000000..ceb88b47
--- /dev/null
+++ b/scripts/automation/trex_control_plane/stl/services/scapy_server/unit_tests/test_utils.py
@@ -0,0 +1,69 @@
+# run with 'nosetests' utility
+
+from basetest import *
+from scapy_service import *
+
+def test_generate_random_bytes():
+    res = generate_random_bytes(10, 333, ord('0'), ord('9'))
+    print(res)
+    assert(len(res) == 10)
+    assert(res == b'5390532937') # random value with this seed
+
+def test_generate_bytes_from_template_empty():
+    res = generate_bytes_from_template(5, b"")
+    print(res)
+    assert(res == b"")
+
+def test_generate_bytes_from_template_neg():
+    res = generate_bytes_from_template(-5, b"qwe")
+    assert(res == b"")
+
+def test_generate_bytes_from_template_less():
+    res = generate_bytes_from_template(5, b"qwe")
+    print(res)
+    assert(res == b"qweqw")
+
+def test_generate_bytes_from_template_same():
+    res = generate_bytes_from_template(5, b"qwert")
+    print(res)
+    assert(res == b"qwert")
+
+def test_generate_bytes_from_template_more():
+    res = generate_bytes_from_template(5, b"qwerty")
+    print(res)
+    assert(res == b"qwert")
+
+def test_parse_template_code_with_trash():
+    res = parse_template_code("0xDE AD\n be ef \t0xDEAD")
+    print(res)
+    assert(res == bytearray.fromhex('DEADBEEFDEAD'))
+
+def test_generate_bytes():
+    res = generate_bytes({"generate":"random_bytes", "seed": 123, "size": 12})
+    print(res)
+    assert(len(res) == 12)
+
+def test_generate_ascii_default_seed():
+    res = generate_bytes({"generate":"random_ascii", "size": 14})
+    print(res)
+    assert(len(res) == 14)
+
+
+def test_generate_template_code_no_size():
+    res = generate_bytes({"generate":"template_code", "template_code": "BE EF"})
+    assert(res == bytearray.fromhex('BE EF'))
+
+def test_generate_template_code_less():
+    res = generate_bytes({"generate":"template_code", "template_code": "DE AD BE EF", "size": 2})
+    assert(res == bytearray.fromhex('DE AD'))
+
+def test_generate_template_code_more():
+    res = generate_bytes({"generate":"template_code", "template_code": "0xDEAD 0xBEEF", "size": 6})
+    assert(res == bytearray.fromhex('DE AD BE EF DE AD'))
+
+def test_generate_template_base64():
+    res = generate_bytes({"generate":"template", "template_base64": bytes_to_b64(b'hi'), "size": 5})
+    print(res)
+    assert(res == b'hihih')
+
+