changed file name from scapy_server to scapy_service

changed file for scapy_zmq_server

changed functionality for scapy_server, added support for port with -s flag.
scapy_service now functions as a service for the server wrapper

2 files changed, 396 insertions, 0 deletions

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
new file mode 100755
index 00000000..6fe8dcc7
--- /dev/null
+++ b/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_service.py
@@ -0,0 +1,248 @@
+
+import os
+import sys
+stl_pathname = os.path.abspath(os.path.join(os.pardir, os.pardir))
+sys.path.append(stl_pathname)
+import trex_stl_lib
+from trex_stl_lib.api import *
+from copy import deepcopy
+import sys
+import tempfile
+import hashlib
+import binascii
+from pprint import pprint
+
+
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from io import StringIO
+
+"""     
+                            **** output redirection template ****
+old_stdout = sys.stdout
+sys.stdout = mystdout = StringIO()
+
+ls()
+
+sys.stdout = old_stdout
+
+a= mystdout.getvalue()
+
+f = open('scapy_supported_formats.txt','w')
+f.write(a)
+f.close()
+"""
+
+class ScapyException(Exception): pass
+
+class Scapy_service:
+
+#----------------------------------------------------------------------------------------------------
+    class scapyRegex:
+        def __init__(self,FieldName,regex='empty'):
+            self.FieldName = FieldName
+            self.regex = regex
+
+        def stringRegex(self):
+            return self.regex        
+#----------------------------------------------------------------------------------------------------
+    def __init__(self):
+        self.Raw = {'Raw':''}
+        self.high_level_protocols = ['Raw']
+        self.transport_protocols = {'TCP':self.Raw,'UDP':self.Raw}
+        self.network_protocols = {'IP':self.transport_protocols ,'ARP':''}
+        self.low_level_protocols = { 'Ether': self.network_protocols }
+        self.regexDB= {'MACField' : self.scapyRegex('MACField','^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$'),
+              'IPField' : self.scapyRegex('IPField','^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$')}
+        self.all_protocols = self.build_lib()
+        self.protocol_tree = {'ALL':{'Ether':{'ARP':{},'IP':{'TCP':{'RAW':'payload'},'UDP':{'RAW':'payload'}}}}}
+    
+    def protocol_struct(self,protocol=''):
+        if '_' in protocol:
+            return []
+        if not protocol=='':
+            if protocol not in self.all_protocols:
+                return 'protocol not supported'
+            protocol = eval(protocol)
+        old_stdout = sys.stdout
+        sys.stdout = mystdout = StringIO()
+        if not protocol=='':
+            ls(protocol)
+        else:
+            ls()
+        sys.stdout = old_stdout
+        protocol_data= mystdout.getvalue()
+        return protocol_data
+
+    def build_lib(self):
+        lib = self.protocol_struct()
+        lib = lib.split('\n')
+        all_protocols=[]
+        for entry in lib:
+            entry = entry.split(':')
+            all_protocols.append(entry[0].strip())
+        del all_protocols[len(all_protocols)-1]
+        return all_protocols
+
+    def parse_description_line(self,line):
+        line_arr = [x.strip() for x in re.split(': | = ',line)]
+        return tuple(line_arr)
+
+    def parse_entire_description(self,description):
+        description = description.split('\n')
+        description_list = [self.parse_description_line(x) for x in description]
+        del description_list[len(description_list)-1]
+        return description_list
+
+    def get_protocol_details(self,p_name):
+        protocol_str = self.protocol_struct(p_name)
+        if protocol_str=='protocol not supported':
+            return 'protocol not supported'
+        if len(protocol_str) is 0:
+            return []
+        tupled_protocol = self.parse_entire_description(protocol_str)
+        return tupled_protocol
+
+    def print_tree(self):
+        pprint(self.protocol_tree)
+
+    def get_all_protocols(self):
+        return self.all_protocols
+
+    def get_tree(self):
+        return self.protocol_tree
+
+    def get_all_db(self):
+        db = {}
+        for pro in self.all_protocols:
+            details = self.get_protocol_details(pro)
+            db[pro] = details
+        return db
+
+    def get_all_fields(self):
+        fields = []
+        for pro in self.all_protocols:
+            details = self.get_protocol_details(pro)
+            for i in range(0,len(details),1):
+                if len(details[i]) is 3:
+                    fields.append(details[i][1])
+        uniqeFields = list(set(fields))
+        fieldDict = {}
+        for f in uniqeFields:
+            if f in self.regexDB:
+                fieldDict[f] = self.regexDB[f].stringRegex()
+            else:
+                fieldDict[f] = self.scapyRegex(f).stringRegex()
+        return fieldDict
+
+    def show2_to_dict(self,pkt):
+        old_stdout = sys.stdout
+        sys.stdout = mystdout = StringIO()
+        pkt.show2()
+        sys.stdout = old_stdout
+        show2data = mystdout.getvalue() #show2 data
+        listedShow2Data = show2data.split('###')
+        show2Dict = {}
+        for i in range(1,len(listedShow2Data)-1,2):
+            protocol_fields = listedShow2Data[i+1]
+            protocol_fields = protocol_fields.split('\n')[1:-1]
+            protocol_fields = [f.strip() for f in protocol_fields]
+            protocol_fields_dict = {}
+            for f in protocol_fields:
+                field_data = f.split('=')
+                if len(field_data)!= 1 :
+                    field_name = field_data[0].strip()
+                    protocol_fields_dict[field_name] = field_data[1].strip()
+            layer_name = re.sub(r'\W+', '',listedShow2Data[i]) #clear layer name to include only alpha-numeric
+            show2Dict[layer_name] = protocol_fields_dict
+        return show2Dict
+
+#pkt_desc as string
+#dictionary of offsets per protocol. tuple for each field: (name, offset, size) at json format
+    def get_all_pkt_offsets(self,pkt_desc):
+        pkt_protocols = pkt_desc.split('/')
+        scapy_pkt = eval(pkt_desc)
+        scapy_pkt.build()
+        total_protocols = len(pkt_protocols)
+        res = {}
+        for i in range(total_protocols):
+            fields = {}
+            for field in scapy_pkt.fields_desc:
+                size = field.get_size_bytes()
+                layer_name = pkt_protocols[i].partition('(')[0] #clear layer name to include only alpha-numeric
+                layer_name = re.sub(r'\W+', '',layer_name)
+                if field.name is 'load':
+                    layer_name ='Raw'
+                    size = len(scapy_pkt)
+                fields[field.name]=[field.offset, size]
+            fields['global_offset'] = scapy_pkt.offset
+            res[layer_name] = fields
+            scapy_pkt=scapy_pkt.payload
+        return res
+
+# pkt_descriptor in string format
+
+    def build_pkt(self,pkt_descriptor):
+        pkt = eval(pkt_descriptor)
+        show2data = self.show2_to_dict(pkt)
+        bufferData = str(pkt) #pkt buffer
+        bufferData = binascii.b2a_base64(bufferData)
+        pkt_offsets = self.get_all_pkt_offsets(pkt_descriptor)
+        res = {}
+        res['show2'] = show2data
+        res['buffer'] = bufferData
+        res['offsets'] = pkt_offsets
+        return res
+
+#input: container
+#output: md5 encoded in base64
+    def get_md5(self,container):
+        container = json.dumps(container)
+        m = hashlib.md5()
+        m.update(container.encode('ascii'))
+        res_md5 = binascii.b2a_base64(m.digest())
+        return res_md5
+
+    def get_all(self):
+        fields=self.get_all_fields()
+        db=self.get_all_db()
+        fields_md5 = self.get_md5(fields)
+        db_md5 = self.get_md5(db)
+        res = {}
+        res['db'] = db
+        res['fields'] = fields
+        res['db_md5'] = db_md5
+        res['fields_md5'] = fields_md5
+        return res
+
+#input in string encoded base64
+    def check_update(self,db_md5,field_md5):
+        fields=self.get_all_fields()
+        db=self.get_all_db()
+        current_db_md5 = self.get_md5(db)
+        current_field_md5 = self.get_md5(fields)
+        res = []
+        if field_md5 == current_field_md5:
+            if db_md5 == current_db_md5:
+                return True
+            else:
+                raise ScapyException("Protocol DB is not up to date")
+        else:
+            raise ScapyException("Fields DB is not up to date")
+
+    def get_version(self):
+        return {'built_by':'itraviv','version':'v1.0'}
+
+    def supported_methods(self,method_name=''):
+        if method_name=='':
+            methods = {}
+            for f in dir(Scapy_service):
+                if inspect.ismethod(eval('Scapy_service.'+f)):
+                    methods[f] = inspect.getargspec(eval('Scapy_service.'+f))[0]
+            return methods
+        if method_name in dir(Scapy_service):
+            return True
+        return False
+
+
diff --git a/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_zmq_server.py b/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_zmq_server.py
new file mode 100755
index 00000000..f494d1db
--- /dev/null
+++ b/scripts/automation/trex_control_plane/stl/services/scapy_server/scapy_zmq_server.py
@@ -0,0 +1,148 @@
+

+import time

+import sys

+import os

+

+python2_zmq_path = os.path.abspath(os.path.join(os.pardir,os.pardir,os.pardir,os.pardir,

+                                                os.pardir,'external_libs','pyzmq-14.5.0','python2','fedora18','64bit'))

+stl_pathname = os.path.abspath(os.path.join(os.pardir, os.pardir))

+sys.path.append(stl_pathname)

+sys.path.append(python2_zmq_path)

+import zmq

+import inspect

+from scapy_service import *

+from argparse import *

+import socket

+

+

+class ParseException(Exception): pass

+class InvalidRequest(Exception): pass

+class MethodNotFound(Exception): pass

+class InvalidParams(Exception): pass

+

+class Scapy_wrapper:

+    def __init__(self):

+        self.scapy_master = Scapy_service()

+

+    def parse_req_msg(self,JSON_req):

+        try:

+            req = json.loads(JSON_req)

+            req_id='null'

+            if (type(req)!= type({})):

+                raise ParseException(req_id)

+            json_rpc_keys = ['jsonrpc','id','method']

+            if ((set(req.keys())!=set(json_rpc_keys)) and (set(req.keys())!=set(json_rpc_keys+['params']))) :

+                if 'id' in req.keys():

+                    req_id = req['id']

+                raise InvalidRequest(req_id)

+            req_id = req['id']

+            if not (self.scapy_master.supported_methods(req['method'])):

+                raise MethodNotFound(req_id)

+            scapy_method = eval("self.scapy_master."+req['method'])

+            arg_num_for_method = len(inspect.getargspec(scapy_method)[0])

+            if (arg_num_for_method>1) :

+                if not ('params' in req.keys()):

+                    raise InvalidRequest(req_id)

+                params_len = len(req['params'])+1 # +1 because "self" is considered parameter in args for method

+                if not (params_len==arg_num_for_method):

+                    raise InvalidParams(req_id)

+                return req['method'],req['params'],req_id

+            else:

+                return req['method'],[],req_id

+        except ValueError:

+            raise ParseException(req_id)

+

+    def create_error_response(self,error_code,error_msg,req_id='null'):

+        return {"jsonrpc": "2.0", "error": {"code": error_code, "message:": error_msg}, "id": req_id}

+        

+    def create_success_response(self,result,req_id='null'):

+        return {"jsonrpc": "2.0", "result": result, "id": req_id }

+    

+    def get_exception(self):

+        return sys.exc_info()

+

+

+    def execute(self,method,params):

+        if len(params)>0:

+            result = eval('self.scapy_master.'+method+'(*'+str(params)+')')

+        else:

+            result = eval('self.scapy_master.'+method+'()')

+        return result

+

+

+    def metaraise(self,exc_info):

+        raise exc_info[0], exc_info[1], exc_info[2]

+

+

+    def error_handler(self,exception_obj,req_id):

+        try:

+            self.metaraise(exception_obj)

+        except ParseException as e:

+            response = self.create_error_response(-32700,'Parse error ',req_id)

+        except InvalidRequest as e:

+            response = self.create_error_response(-32600,'Invalid Request',req_id)

+        except MethodNotFound as e:

+            response = self.create_error_response(-32601,'Method not found',req_id)

+        except InvalidParams as e:

+            response = self.create_error_response(-32603,'Invalid params',req_id)

+        except SyntaxError as e:

+            response = self.create_error_response(-32097,'SyntaxError',req_id)

+        except BaseException as e:

+            response = self.create_error_response(-32098,'Scapy Server: '+str(e.message),req_id)

+        except:

+            response = self.create_error_response(-32096,'Scapy Server: Unknown Error',req_id)

+        finally:

+            return response

+

+

+

+parser = ArgumentParser(description=' Runs Scapy Server ')

+parser.add_argument('-s','--scapy-port',type=int, default = 4507, dest='scapy_port',

+                    help='Select port to which Scapy Server will listen to.\n default is 4507\n',action='store')

+args = parser.parse_args()

+

+port = args.scapy_port

+

+class Scapy_server():

+    def __init__(self, port=4507):

+        self.scapy_wrapper = Scapy_wrapper()

+        self.port = port

+        self.context = zmq.Context()

+        self.socket = self.context.socket(zmq.REP)

+        self.socket.bind("tcp://*:"+str(port))

+        self.IP_address = socket.gethostbyname(socket.gethostname())

+

+    def activate(self):

+        print '***Scapy Server Started***\nListening on port: %d' % self.port

+        print 'Server IP address: %s' % self.IP_address

+        try:

+            while True:

+                message = self.socket.recv()

+                try:

+                    method,params,req_id = self.scapy_wrapper.parse_req_msg(message)

+                    result = self.scapy_wrapper.execute(method,params)

+                    response = self.scapy_wrapper.create_success_response(result,req_id)

+                except Exception as e:

+                    exception_details = self.scapy_wrapper.get_exception()

+                    response = self.scapy_wrapper.error_handler(exception_details,req_id)

+                finally:

+                    json_response = json.dumps(response)

+                #  Send reply back to client

+                    self.socket.send(json_response)

+        except KeyboardInterrupt:

+                print('Terminated By Ctrl+C')

+

+

+#s = Scapy_server(port)

+#s.activate()

+

+#arg1 is port number for the server to listen to

+def main(arg1=4507):

+    s = Scapy_server(arg1)

+    s.activate()

+

+if __name__=='__main__':

+    if len(sys.argv)>1:

+        sys.exit(main(int(sys.argv[2])))

+    else:

+        sys.exit(main())