diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/vpp-api/python/setup.py | 11 | ||||
| -rwxr-xr-x | src/vpp-api/python/tests/test_vpp_serializer.py | 114 | ||||
| -rw-r--r-- | src/vpp-api/python/vpp_papi/__init__.py | 1 | ||||
| -rw-r--r-- | src/vpp-api/python/vpp_papi/vpp_papi.py (renamed from src/vpp-api/python/vpp_papi.py) | 393 | ||||
| -rw-r--r-- | src/vpp-api/python/vpp_papi/vpp_serializer.py | 332 |
5 files changed, 542 insertions, 309 deletions
diff --git a/src/vpp-api/python/setup.py b/src/vpp-api/python/setup.py index abda43de606..20b9901d521 100644 --- a/src/vpp-api/python/setup.py +++ b/src/vpp-api/python/setup.py @@ -13,21 +13,20 @@ # limitations under the License. try: - from setuptools import setup + from setuptools import setup, find_packages except ImportError: - from distutils.core import setup + from distutils.core import setup, find_packages setup (name = 'vpp_papi', - version = '1.4', + version = '1.5', description = 'VPP Python binding', author = 'Ole Troan', author_email = 'ot@cisco.com', url = 'https://wiki.fd.io/view/VPP/Python_API', - python_requires='>=2.7, >=3.3', license = 'Apache-2.0', test_suite = 'tests', - install_requires=['cffi >= 1.6'], - py_modules=['vpp_papi'], + install_requires=['cffi >= 1.6', 'enum34'], + packages=find_packages(), long_description = '''VPP Python language binding.''', zip_safe = True, ) diff --git a/src/vpp-api/python/tests/test_vpp_serializer.py b/src/vpp-api/python/tests/test_vpp_serializer.py new file mode 100755 index 00000000000..6b867f9e6fe --- /dev/null +++ b/src/vpp-api/python/tests/test_vpp_serializer.py @@ -0,0 +1,114 @@ +#!/usr/bin/env python3 + +import unittest +from vpp_serializer import VPPType, VPPEnumType, VPPUnionType +from socket import inet_pton, AF_INET, AF_INET6 +import logging + +logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.DEBUG) +es_logger = logging.getLogger('vpp_serializer') +es_logger.setLevel(logging.DEBUG) + +class VPPMessage(VPPType): + pass + + +class TestAddType(unittest.TestCase): + + def test_union(self): + un = VPPUnionType('test_union', + [['u8', 'is_bool'], + ['u32', 'is_int']]) + + b = un.pack({'is_int': 0x1234}) + self.assertEqual(len(b), 4) + nt = un.unpack(b) + self.assertEqual(nt.is_bool, 52) + self.assertEqual(nt.is_int, 0x1234) + + def test_address(self): + af = VPPEnumType('vl_api_address_family_t', [["ADDRESS_IP4", 0], + ["ADDRESS_IP6", 1], + {"enumtype": "u32"}]) + ip4 = VPPType('vl_api_ip4_address_t', [['u8', 'address', 4]]) + ip6 = VPPType('vl_api_ip6_address_t', [['u8', 'address', 16]]) + VPPUnionType('vl_api_address_union_t', + [["vl_api_ip4_address_t", "ip4"], + ["vl_api_ip6_address_t", "ip6"]]) + + address = VPPType('address', [['vl_api_address_family_t', 'af'], + ['vl_api_address_union_t', 'un']]) + + b = ip4.pack({'address': inet_pton(AF_INET, '1.1.1.1')}) + self.assertEqual(len(b), 4) + nt = ip4.unpack(b) + self.assertEqual(nt.address, inet_pton(AF_INET, '1.1.1.1')) + + b = ip6.pack({'address': inet_pton(AF_INET6, '1::1')}) + self.assertEqual(len(b), 16) + + b = address.pack({'af': af.ADDRESS_IP4, + 'un': + {'ip4': + {'address': inet_pton(AF_INET, '2.2.2.2')}}}) + self.assertEqual(len(b), 20) + + nt = address.unpack(b) + print('NT union', nt) + self.assertEqual(nt.af, af.ADDRESS_IP4) + self.assertEqual(nt.un.ip4.address, + inet_pton(AF_INET, '2.2.2.2')) + self.assertEqual(nt.un.ip6.address, + inet_pton(AF_INET6, '::0202:0202')) + + def test_arrays(self): + # Test cases + # 1. Fixed list + # 2. Fixed list of variable length sub type + # 3. Variable length type + # + ip4 = VPPType('ip4_address', [['u8', 'address', 4]]) + listip4 = VPPType('list_ip4_t', [['ip4_address', 'addresses', 4]]) + valistip4 = VPPType('list_ip4_t', + [['u8', 'count'], + ['ip4_address', 'addresses', 0, 'count']]) + + valistip4_legacy = VPPType('list_ip4_t', + [['u8', 'foo'], + ['ip4_address', 'addresses', 0]]) + + addresses = [] + for i in range(4): + addresses.append({'address': inet_pton(AF_INET, '2.2.2.2')}) + b = listip4.pack({'addresses': addresses}) + self.assertEqual(len(b), 16) + nt = listip4.unpack(b) + + self.assertEqual(nt.addresses[0].address, + inet_pton(AF_INET, '2.2.2.2')) + + b = valistip4.pack({'count': len(addresses), 'addresses': addresses}) + self.assertEqual(len(b), 17) + + nt = valistip4.unpack(b) + print('NT', nt) + + b = valistip4_legacy.pack({'foo': 1, 'addresses': addresses}) + self.assertEqual(len(b), 17) + nt = valistip4_legacy.unpack(b) + print('NT', nt) + + + def test_message(self): + foo = VPPMessage('foo', [['u16', '_vl_msg_id'], + ['u8', 'client_index'], + ['u8', 'something'], + {"crc": "0x559b9f3c"}]) + b = foo.pack({'_vl_msg_id': 1, 'client_index': 5, + 'something': 200}) + self.assertEqual(len(b), 4) + nt = foo.unpack(b) + print('NT', nt) + +if __name__ == '__main__': + unittest.main() diff --git a/src/vpp-api/python/vpp_papi/__init__.py b/src/vpp-api/python/vpp_papi/__init__.py new file mode 100644 index 00000000000..f9afcf17f29 --- /dev/null +++ b/src/vpp-api/python/vpp_papi/__init__.py @@ -0,0 +1 @@ +from .vpp_papi import * diff --git a/src/vpp-api/python/vpp_papi.py b/src/vpp-api/python/vpp_papi/vpp_papi.py index ece0e4ee52d..5ff8064d425 100644 --- a/src/vpp-api/python/vpp_papi.py +++ b/src/vpp-api/python/vpp_papi/vpp_papi.py @@ -27,6 +27,7 @@ import weakref import atexit from cffi import FFI import cffi +from vpp_serializer import VPPType, VPPEnumType, VPPUnionType, BaseTypes if sys.version[0] == '2': import Queue as queue @@ -103,6 +104,9 @@ class FuncWrapper(object): return self._func(**kwargs) +class VPPMessage(VPPType): + pass + class VPP(): """VPP interface. @@ -115,8 +119,56 @@ class VPP(): provides a means to register a callback function to receive these messages in a background thread. """ + + def process_json_file(self, apidef_file): + api = json.load(apidef_file) + types = {} + for t in api['enums']: + t[0] = 'vl_api_' + t[0] + '_t' + types[t[0]] = {'type': 'enum', 'data': t} + for t in api['unions']: + t[0] = 'vl_api_' + t[0] + '_t' + types[t[0]] = {'type': 'union', 'data': t} + for t in api['types']: + t[0] = 'vl_api_' + t[0] + '_t' + types[t[0]] = {'type': 'type', 'data': t} + + i = 0 + while True: + unresolved = {} + for k, v in types.items(): + t = v['data'] + if v['type'] == 'enum': + try: + VPPEnumType(t[0], t[1:]) + except ValueError: + unresolved[k] = v + elif v['type'] == 'union': + try: + VPPUnionType(t[0], t[1:]) + except ValueError: + unresolved[k] = v + elif v['type'] == 'type': + try: + VPPType(t[0], t[1:]) + except ValueError: + unresolved[k] = v + if len(unresolved) == 0: + break + if i > 3: + raise ValueError('Unresolved type definitions {}' + .format(unresolved)) + types = unresolved + i += 1 + + for m in api['messages']: + try: + self.messages[m[0]] = VPPMessage(m[0], m[1:]) + except NotImplementedError: + self.logger.error('Not implemented error for {}'.format(m[0])) + def __init__(self, apifiles=None, testmode=False, async_thread=True, - logger=None, loglevel=None, + logger=logging.getLogger('vpp_papi'), loglevel='debug', read_timeout=0): """Create a VPP API object. @@ -137,14 +189,14 @@ class VPP(): logger = logging.getLogger(__name__) if loglevel is not None: logger.setLevel(loglevel) - self.logger = logger self.messages = {} self.id_names = [] self.id_msgdef = [] self.connected = False - self.header = struct.Struct('>HI') + self.header = VPPType('header', [['u16', 'msgid'], + ['u32', 'client_index']]) self.apifiles = [] self.event_callback = None self.message_queue = queue.Queue() @@ -165,12 +217,8 @@ class VPP(): for file in apifiles: with open(file) as apidef_file: - api = json.load(apidef_file) - for t in api['types']: - self.add_type(t[0], t[1:]) + self.process_json_file(apidef_file) - for m in api['messages']: - self.add_message(m[0], m[1:]) self.apifiles = apifiles # Basic sanity check @@ -181,7 +229,8 @@ class VPP(): atexit.register(vpp_atexit, weakref.ref(self)) # Register error handler - vpp_api.vac_set_error_handler(vac_error_handler) + if not testmode: + vpp_api.vac_set_error_handler(vac_error_handler) # Support legacy CFFI # from_buffer supported from 1.8.0 @@ -334,305 +383,38 @@ class VPP(): print('Connected') if self.connected else print('Not Connected') print('Read API definitions from', ', '.join(self.apifiles)) - def __struct(self, t, n=None, e=-1, vl=None): - """Create a packing structure for a message.""" - base_types = {'u8': 'B', - 'u16': 'H', - 'u32': 'I', - 'i32': 'i', - 'u64': 'Q', - 'f64': 'd', } - - if t in base_types: - if not vl: - if e > 0 and t == 'u8': - # Fixed byte array - s = struct.Struct('>' + str(e) + 's') - return s.size, s - if e > 0: - # Fixed array of base type - s = struct.Struct('>' + base_types[t]) - return s.size, [e, s] - elif e == 0: - # Old style variable array - s = struct.Struct('>' + base_types[t]) - return s.size, [-1, s] - else: - # Variable length array - if t == 'u8': - s = struct.Struct('>s') - return s.size, [vl, s] - else: - s = struct.Struct('>' + base_types[t]) - return s.size, [vl, s] - - s = struct.Struct('>' + base_types[t]) - return s.size, s - - if t in self.messages: - size = self.messages[t]['sizes'][0] - - # Return a list in case of array - if e > 0 and not vl: - return size, [e, lambda self, encode, buf, offset, args: ( - self.__struct_type(encode, self.messages[t], buf, offset, - args))] - if vl: - return size, [vl, lambda self, encode, buf, offset, args: ( - self.__struct_type(encode, self.messages[t], buf, offset, - args))] - elif e == 0: - # Old style VLA - raise NotImplementedError(1, - 'No support for compound types ' + t) - return size, lambda self, encode, buf, offset, args: ( - self.__struct_type(encode, self.messages[t], buf, offset, args) - ) - - raise ValueError(1, 'Invalid message type: ' + t) - - def __struct_type(self, encode, msgdef, buf, offset, kwargs): - """Get a message packer or unpacker.""" - if encode: - return self.__struct_type_encode(msgdef, buf, offset, kwargs) - else: - return self.__struct_type_decode(msgdef, buf, offset) - - def __struct_type_encode(self, msgdef, buf, offset, kwargs): - off = offset - size = 0 - - for k in kwargs: - if k not in msgdef['args']: - raise ValueError(1, 'Non existing argument [' + k + ']' + - ' used in call to: ' + - self.id_names[kwargs['_vl_msg_id']] + '()') - - for k, v in vpp_iterator(msgdef['args']): - off += size - if k in kwargs: - if type(v) is list: - if callable(v[1]): - e = kwargs[v[0]] if v[0] in kwargs else v[0] - if e != len(kwargs[k]): - raise (ValueError(1, - 'Input list length mismatch: ' - '%s (%s != %s)' % - (k, e, len(kwargs[k])))) - size = 0 - for i in range(e): - size += v[1](self, True, buf, off + size, - kwargs[k][i]) - else: - if v[0] in kwargs: - kwargslen = kwargs[v[0]] - if kwargslen != len(kwargs[k]): - raise ValueError(1, - 'Input list length mismatch:' - ' %s (%s != %s)' % - (k, kwargslen, - len(kwargs[k]))) - else: - kwargslen = len(kwargs[k]) - if v[1].size == 1: - buf[off:off + kwargslen] = bytearray(kwargs[k]) - size = kwargslen - else: - size = 0 - for i in kwargs[k]: - v[1].pack_into(buf, off + size, i) - size += v[1].size - else: - if callable(v): - size = v(self, True, buf, off, kwargs[k]) - else: - if type(kwargs[k]) is str and v.size < len(kwargs[k]): - raise ValueError(1, - 'Input list length mismatch: ' - '%s (%s < %s)' % - (k, v.size, len(kwargs[k]))) - v.pack_into(buf, off, kwargs[k]) - size = v.size - else: - size = v.size if not type(v) is list else 0 - - return off + size - offset - - def __getitem__(self, name): - if name in self.messages: - return self.messages[name] - return None - - def get_size(self, sizes, kwargs): - total_size = sizes[0] - for e in sizes[1]: - if e in kwargs and type(kwargs[e]) is list: - total_size += len(kwargs[e]) * sizes[1][e] - return total_size - - def encode(self, msgdef, kwargs): - # Make suitably large buffer - size = self.get_size(msgdef['sizes'], kwargs) - buf = bytearray(size) - offset = 0 - size = self.__struct_type(True, msgdef, buf, offset, kwargs) - return buf[:offset + size] - - def decode(self, msgdef, buf): - return self.__struct_type(False, msgdef, buf, 0, None)[1] - - def __struct_type_decode(self, msgdef, buf, offset): - res = [] - off = offset - size = 0 - for k, v in vpp_iterator(msgdef['args']): - off += size - if type(v) is list: - lst = [] - if callable(v[1]): # compound type - size = 0 - if v[0] in msgdef['args']: # vla - e = res[v[2]] - else: # fixed array - e = v[0] - res.append(lst) - for i in range(e): - (s, l) = v[1](self, False, buf, off + size, None) - lst.append(l) - size += s - continue - if v[1].size == 1: - if type(v[0]) is int: - size = len(buf) - off - else: - size = res[v[2]] - res.append(buf[off:off + size]) - else: - e = v[0] if type(v[0]) is int else res[v[2]] - if e == -1: - e = (len(buf) - off) / v[1].size - lst = [] - res.append(lst) - size = 0 - for i in range(e): - lst.append(v[1].unpack_from(buf, off + size)[0]) - size += v[1].size - else: - if callable(v): - size = 0 - (s, l) = v(self, False, buf, off, None) - res.append(l) - size += s - else: - res.append(v.unpack_from(buf, off)[0]) - size = v.size - - return off + size - offset, msgdef['return_tuple']._make(res) - - def ret_tup(self, name): - if name in self.messages and 'return_tuple' in self.messages[name]: - return self.messages[name]['return_tuple'] - return None + @property + def api(self): + if not hasattr(self, "_api"): + raise Exception("Not connected, api definitions not available") + return self._api - def duplicate_check_ok(self, name, msgdef): - crc = None - for c in msgdef: - if type(c) is dict and 'crc' in c: - crc = c['crc'] - break - if crc: - # We can get duplicates because of imports - if crc == self.messages[name]['crc']: - return True - return False - - def add_message(self, name, msgdef, typeonly=False): - if name in self.messages: - if typeonly: - if self.duplicate_check_ok(name, msgdef): - return - raise ValueError('Duplicate message name: ' + name) - - args = collections.OrderedDict() - argtypes = collections.OrderedDict() - fields = [] - msg = {} - total_size = 0 - sizes = {} - for i, f in enumerate(msgdef): - if type(f) is dict and 'crc' in f: - msg['crc'] = f['crc'] - continue - field_type = f[0] - field_name = f[1] - if len(f) == 3 and f[2] == 0 and i != len(msgdef) - 2: - raise ValueError('Variable Length Array must be last: ' + name) - size, s = self.__struct(*f) - args[field_name] = s - if type(s) == list and type(s[0]) == int and \ - type(s[1]) == struct.Struct: - if s[0] < 0: - sizes[field_name] = size - else: - sizes[field_name] = size - total_size += s[0] * size - else: - sizes[field_name] = size - total_size += size - - argtypes[field_name] = field_type - if len(f) == 4: # Find offset to # elements field - idx = list(args.keys()).index(f[3]) - i - args[field_name].append(idx) - fields.append(field_name) - msg['return_tuple'] = collections.namedtuple(name, fields, - rename=True) - self.messages[name] = msg - self.messages[name]['args'] = args - self.messages[name]['argtypes'] = argtypes - self.messages[name]['typeonly'] = typeonly - self.messages[name]['sizes'] = [total_size, sizes] - return self.messages[name] - - def add_type(self, name, typedef): - return self.add_message('vl_api_' + name + '_t', typedef, - typeonly=True) - - def make_function(self, name, i, msgdef, multipart, async): + def make_function(self, msg, i, multipart, async): if (async): def f(**kwargs): - return self._call_vpp_async(i, msgdef, **kwargs) + return self._call_vpp_async(i, msg, **kwargs) else: def f(**kwargs): - return self._call_vpp(i, msgdef, multipart, **kwargs) - args = self.messages[name]['args'] - argtypes = self.messages[name]['argtypes'] - f.__name__ = str(name) + return self._call_vpp(i, msg, multipart, **kwargs) + + f.__name__ = str(msg.name) f.__doc__ = ", ".join(["%s %s" % - (argtypes[k], k) for k in args.keys()]) + (msg.fieldtypes[j], k) for j, k in enumerate(msg.fields)]) return f - @property - def api(self): - if not hasattr(self, "_api"): - raise Exception("Not connected, api definitions not available") - return self._api - def _register_functions(self, async=False): self.id_names = [None] * (self.vpp_dictionary_maxid + 1) self.id_msgdef = [None] * (self.vpp_dictionary_maxid + 1) self._api = Empty() - for name, msgdef in vpp_iterator(self.messages): - if self.messages[name]['typeonly']: - continue - crc = self.messages[name]['crc'] - n = name + '_' + crc[2:] + for name, msg in vpp_iterator(self.messages): + n = name + '_' + msg.crc[2:] i = vpp_api.vac_get_msg_index(n.encode()) if i > 0: - self.id_msgdef[i] = msgdef + self.id_msgdef[i] = msg self.id_names[i] = name + # TODO: Fix multipart (use services) multipart = True if name.find('_dump') > 0 else False - f = self.make_function(name, i, msgdef, multipart, async) + f = self.make_function(msg, i, multipart, async) setattr(self._api, name, FuncWrapper(f)) else: self.logger.debug( @@ -669,12 +451,11 @@ class VPP(): if rv != 0: raise IOError(2, 'Connect failed') self.connected = True - self.vpp_dictionary_maxid = vpp_api.vac_msg_table_max_index() self._register_functions(async=async) # Initialise control ping - crc = self.messages['control_ping']['crc'] + crc = self.messages['control_ping'].crc self.control_ping_index = vpp_api.vac_get_msg_index( ('control_ping' + '_' + crc[2:]).encode()) self.control_ping_msgdef = self.messages['control_ping'] @@ -743,18 +524,18 @@ class VPP(): self.logger.warning('vpp_api.read failed') return - i, ci = self.header.unpack_from(msg, 0) + i, ci = self.header.unpack(msg, 0) if self.id_names[i] == 'rx_thread_exit': return # # Decode message and returns a tuple. # - msgdef = self.id_msgdef[i] - if not msgdef: + msgobj = self.id_msgdef[i] + if not msgobj: raise IOError(2, 'Reply message undefined') - r = self.decode(msgdef, msg) + r = msgobj.unpack(msg) return r @@ -778,7 +559,12 @@ class VPP(): self.control_ping_msgdef, context=context) - def _call_vpp(self, i, msgdef, multipart, **kwargs): + def validate_args(self, msg, kwargs): + d = set(kwargs.keys()) - set(msg.field_by_name.keys()) + if d: + raise ValueError('Invalid argument {} to {}'.format(list(d), msg.name)) + + def _call_vpp(self, i, msg, multipart, **kwargs): """Given a message, send the message and await a reply. msgdef - the message packing definition @@ -800,8 +586,9 @@ class VPP(): else: context = kwargs['context'] kwargs['_vl_msg_id'] = i - b = self.encode(msgdef, kwargs) + self.validate_args(msg, kwargs) + b = msg.pack(kwargs) vpp_api.vac_rx_suspend() self._write(b) @@ -816,7 +603,6 @@ class VPP(): msg = self._read() if not msg: raise IOError(2, 'VPP API client: read failed') - r = self.decode_incoming_msg(msg) msgname = type(r).__name__ if context not in r or r.context == 0 or context != r.context: @@ -835,7 +621,7 @@ class VPP(): return rl - def _call_vpp_async(self, i, msgdef, **kwargs): + def _call_vpp_async(self, i, msg, **kwargs): """Given a message, send the message and await a reply. msgdef - the message packing definition @@ -849,8 +635,9 @@ class VPP(): kwargs['context'] = context else: context = kwargs['context'] + kwargs['client_index'] = 0 kwargs['_vl_msg_id'] = i - b = self.encode(msgdef, kwargs) + b = msg.pack(kwargs) self._write(b) diff --git a/src/vpp-api/python/vpp_papi/vpp_serializer.py b/src/vpp-api/python/vpp_papi/vpp_serializer.py new file mode 100644 index 00000000000..146a8f6919a --- /dev/null +++ b/src/vpp-api/python/vpp_papi/vpp_serializer.py @@ -0,0 +1,332 @@ +# +# Copyright (c) 2018 Cisco and/or its affiliates. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +import struct +import collections +from enum import IntEnum +import logging + +# +# Set log-level in application by doing e.g.: +# logger = logging.getLogger('vpp_serializer') +# logger.setLevel(logging.DEBUG) +# +logger = logging.getLogger(__name__) +FORMAT = "[%(filename)s:%(lineno)s - %(funcName)s() ] %(message)s" +logging.basicConfig(format=FORMAT) + + +class BaseTypes(): + def __init__(self, type, elements=0): + base_types = {'u8': '>B', + 'u16': '>H', + 'u32': '>I', + 'i32': '>i', + 'u64': '>Q', + 'f64': '>d', + 'header': '>HI'} + + if elements > 0 and type == 'u8': + self.packer = struct.Struct('>%ss' % elements) + else: + self.packer = struct.Struct(base_types[type]) + self.size = self.packer.size + logger.debug('Adding {} with format: {}' + .format(type, base_types[type])) + + def pack(self, data, kwargs=None): + logger.debug("Data: {} Format: {}".format(data, self.packer.format)) + return self.packer.pack(data) + + def unpack(self, data, offset, result=None): + logger.debug("@ {} Format: {}".format(offset, self.packer.format)) + return self.packer.unpack_from(data, offset)[0] + + +types = {} +types['u8'] = BaseTypes('u8') +types['u16'] = BaseTypes('u16') +types['u32'] = BaseTypes('u32') +types['i32'] = BaseTypes('i32') +types['u64'] = BaseTypes('u64') +types['f64'] = BaseTypes('f64') + + +class FixedList_u8(): + def __init__(self, name, field_type, num): + self.name = name + self.num = num + self.packer = BaseTypes(field_type, num) + self.size = self.packer.size + + def pack(self, list, kwargs): + logger.debug("Data: {}".format(list)) + + if len(list) > self.num: + raise ValueError('Fixed list length error for "{}", got: {}' + ' expected: {}' + .format(self.name, len(list), self.num)) + return self.packer.pack(list) + + def unpack(self, data, offset=0, result=None): + if len(data[offset:]) < self.num: + raise ValueError('Invalid array length for "{}" got {}' + ' expected {}' + .format(self.name, len(data), self.num)) + return self.packer.unpack(data, offset) + + +class FixedList(): + def __init__(self, name, field_type, num): + self.num = num + self.packer = types[field_type] + self.size = self.packer.size * num + + def pack(self, list, kwargs): + logger.debug("Data: {}".format(list)) + + if len(list) != self.num: + raise ValueError('Fixed list length error, got: {} expected: {}' + .format(len(list), self.num)) + b = bytes() + for e in list: + b += self.packer.pack(e) + return b + + def unpack(self, data, offset=0, result=None): + # Return a list of arguments + result = [] + for e in range(self.num): + x = self.packer.unpack(data, offset) + result.append(x) + offset += self.packer.size + return result + + +class VLAList(): + def __init__(self, name, field_type, len_field_name, index): + self.index = index + self.packer = types[field_type] + self.size = self.packer.size + self.length_field = len_field_name + + def pack(self, list, kwargs=None): + logger.debug("Data: {}".format(list)) + if len(list) != kwargs[self.length_field]: + raise ValueError('Variable length error, got: {} expected: {}' + .format(len(list), kwargs[self.length_field])) + b = bytes() + + # u8 array + if self.packer.size == 1: + p = BaseTypes('u8', len(list)) + return p.pack(list) + + for e in list: + b += self.packer.pack(e) + return b + + def unpack(self, data, offset=0, result=None): + logger.debug("Data: {} @ {} Result: {}" + .format(list, offset, result[self.index])) + # Return a list of arguments + + # u8 array + if self.packer.size == 1: + if result[self.index] == 0: + return b'' + p = BaseTypes('u8', result[self.index]) + r = p.unpack(data, offset) + return r + + r = [] + for e in range(result[self.index]): + x = self.packer.unpack(data, offset) + r.append(x) + offset += self.packer.size + return r + + +class VLAList_legacy(): + def __init__(self, name, field_type): + self.packer = types[field_type] + self.size = self.packer.size + + def pack(self, list, kwargs=None): + logger.debug("Data: {}".format(list)) + b = bytes() + for e in list: + b += self.packer.pack(e) + return b + + def unpack(self, data, offset=0, result=None): + # Return a list of arguments + if (len(data) - offset) % self.packer.size: + raise ValueError('Legacy Variable Length Array length mismatch.') + elements = int((len(data) - offset) / self.packer.size) + r = [] + logger.debug("Legacy VLA: {} elements of size {}" + .format(elements, self.packer.size)) + for e in range(elements): + x = self.packer.unpack(data, offset) + r.append(x) + offset += self.packer.size + return r + + +class VPPEnumType(): + def __init__(self, name, msgdef): + self.size = types['u32'].size + e_hash = {} + for f in msgdef: + if type(f) is dict and 'enumtype' in f: + if f['enumtype'] != 'u32': + raise NotImplementedError + continue + ename, evalue = f + e_hash[ename] = evalue + self.enum = IntEnum(name, e_hash) + types[name] = self + logger.debug('Adding enum {}'.format(name)) + + def __getattr__(self, name): + return self.enum[name] + + def pack(self, data, kwargs=None): + logger.debug("Data: {}".format(data)) + return types['u32'].pack(data, kwargs) + + def unpack(self, data, offset=0, result=None): + x = types['u32'].unpack(data, offset) + return self.enum(x) + + +class VPPUnionType(): + def __init__(self, name, msgdef): + self.name = name + self.size = 0 + self.maxindex = 0 + fields = [] + self.packers = collections.OrderedDict() + for i, f in enumerate(msgdef): + if type(f) is dict and 'crc' in f: + self.crc = f['crc'] + continue + f_type, f_name = f + if f_type not in types: + logger.debug('Unknown union type {}'.format(f_type)) + raise ValueError('Unknown message type {}'.format(f_type)) + fields.append(f_name) + size = types[f_type].size + self.packers[f_name] = types[f_type] + if size > self.size: + self.size = size + self.maxindex = i + + types[name] = self + self.tuple = collections.namedtuple(name, fields, rename=True) + logger.debug('Adding union {}'.format(name)) + + def pack(self, data, kwargs=None): + logger.debug("Data: {}".format(data)) + for k, v in data.items(): + logger.debug("Key: {} Value: {}".format(k, v)) + b = self.packers[k].pack(v, kwargs) + offset = self.size - self.packers[k].size + break + r = bytearray(self.size) + r[offset:] = b + return r + + def unpack(self, data, offset=0, result=None): + r = [] + for k, p in self.packers.items(): + union_offset = self.size - p.size + r.append(p.unpack(data, offset + union_offset)) + return self.tuple._make(r) + + +class VPPType(): + # Set everything up to be able to pack / unpack + def __init__(self, name, msgdef): + self.name = name + self.msgdef = msgdef + self.packers = [] + self.fields = [] + self.fieldtypes = [] + self.field_by_name = {} + size = 0 + for i, f in enumerate(msgdef): + if type(f) is dict and 'crc' in f: + self.crc = f['crc'] + continue + f_type, f_name = f[:2] + self.fields.append(f_name) + self.field_by_name[f_name] = None + self.fieldtypes.append(f_type) + if f_type not in types: + logger.debug('Unknown type {}'.format(f_type)) + raise ValueError('Unknown message type {}'.format(f_type)) + if len(f) == 3: # list + list_elements = f[2] + if list_elements == 0: + p = VLAList_legacy(f_name, f_type) + self.packers.append(p) + elif f_type == 'u8': + p = FixedList_u8(f_name, f_type, list_elements) + self.packers.append(p) + size += p.size + else: + p = FixedList(f_name, f_type, list_elements) + self.packers.append(p) + size += p.size + elif len(f) == 4: # Variable length list + # Find index of length field + length_index = self.fields.index(f[3]) + p = VLAList(f_name, f_type, f[3], length_index) + self.packers.append(p) + else: + self.packers.append(types[f_type]) + size += types[f_type].size + + self.size = size + self.tuple = collections.namedtuple(name, self.fields, rename=True) + types[name] = self + logger.debug('Adding type {}'.format(name)) + + def pack(self, data, kwargs=None): + if not kwargs: + kwargs = data + logger.debug("Data: {}".format(data)) + b = bytes() + for i, a in enumerate(self.fields): + if a not in data: + logger.debug("Argument {} not given, defaulting to 0" + .format(a)) + b += b'\x00' * self.packers[i].size + continue + b += self.packers[i].pack(data[a], kwargs) + return b + + def unpack(self, data, offset=0, result=None): + # Return a list of arguments + result = [] + for p in self.packers: + x = p.unpack(data, offset, result) + if type(x) is tuple and len(x) == 1: + x = x[0] + result.append(x) + offset += p.size + return self.tuple._make(result) |