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authorOle Troan <ot@cisco.com>2016-12-18 13:15:08 +0100
committerDamjan Marion <dmarion.lists@gmail.com>2016-12-19 21:38:35 +0000
commitf5984bde0462f21402ba5c2c3ad04e44440402eb (patch)
tree2e37bbe0479e63e91cab687f4fad858f57a338d5 /vpp-api/python/vpp_papi/vpp_papi.py
parent65cc8c0dbf04f2418200e682caeae9c1e7396e10 (diff)
Python API: Add back support for old-style VLA, e.g. mask[0]
Change-Id: I5be6bfe522e5ea93934f0ddf75d4e4707376dc0c Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'vpp-api/python/vpp_papi/vpp_papi.py')
-rw-r--r--vpp-api/python/vpp_papi/vpp_papi.py67
1 files changed, 42 insertions, 25 deletions
diff --git a/vpp-api/python/vpp_papi/vpp_papi.py b/vpp-api/python/vpp_papi/vpp_papi.py
index 8e7b7f66ff5..02fe2457ef0 100644
--- a/vpp-api/python/vpp_papi/vpp_papi.py
+++ b/vpp-api/python/vpp_papi/vpp_papi.py
@@ -15,7 +15,7 @@
#
from __future__ import print_function
-import sys, os, logging, collections, struct, json, threading
+import sys, os, logging, collections, struct, json, threading, glob
logging.basicConfig(level=logging.DEBUG)
import vpp_api
@@ -23,7 +23,7 @@ def eprint(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
class VPP():
- def __init__(self, apifiles):
+ def __init__(self, apifiles = None, testmode = False):
self.messages = {}
self.id_names = []
self.id_msgdef = []
@@ -34,6 +34,10 @@ class VPP():
self.timeout = 5
self.apifile = []
+ if not apifiles:
+ # Pick up API definitions from default directory
+ apifiles = glob.glob('/usr/share/vpp/api/*.api.json')
+
for file in apifiles:
self.apifile.append(file)
with open(file) as apidef_file:
@@ -45,8 +49,8 @@ class VPP():
self.add_message(m[0], m[1:])
# Basic sanity check
- if not 'control_ping' in self.messages:
- raise ValueError(1, 'Error in JSON message definitions')
+ if len(self.messages) == 0 and not testmode:
+ raise ValueError(1, 'Missing JSON message definitions')
class ContextId(object):
@@ -61,7 +65,7 @@ class VPP():
print('Connected') if self.connected else print('Not Connected')
print('Read API definitions from', self.apifile)
- def __struct (self, t, n = None, e = 0, vl = None):
+ def __struct (self, t, n = None, e = -1, vl = None):
base_types = { 'u8' : 'B',
'u16' : 'H',
'u32' : 'I',
@@ -73,33 +77,40 @@ class VPP():
if t in base_types:
pack = base_types[t]
if not vl:
- if e and t == 'u8':
+ if e > 0 and t == 'u8':
# Fixed byte array
return struct.Struct('>' + str(e) + 's')
- if e:
+ if e > 0:
# Fixed array of base type
return [e, struct.Struct('>' + base_types[t])]
+ elif e == 0:
+ # Old style variable array
+ return [-1, struct.Struct('>' + base_types[t])]
else:
# Variable length array
- return [vl, struct.Struct('>s')] if t == 'u8' else [vl, struct.Struct('>' + base_types[t])]
+ return [vl, struct.Struct('>s')] if t == 'u8' else \
+ [vl, struct.Struct('>' + base_types[t])]
return struct.Struct('>' + base_types[t])
if t in self.messages:
### Return a list in case of array ###
- if e and not vl:
+ if e > 0 and not vl:
return [e, lambda self, encode, buf, offset, args: (
- self.__struct_type(encode, self.messages[t], buf, offset, args)
- )]
+ self.__struct_type(encode, self.messages[t], buf, offset,
+ args))]
if vl:
return [vl, lambda self, encode, buf, offset, args: (
- self.__struct_type(encode, self.messages[t], 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 lambda self, encode, buf, offset, args: (
self.__struct_type(encode, self.messages[t], buf, offset, args)
)
- raise ValueError
+ raise ValueError(1, 'Invalid message type: ' + t)
def __struct_type(self, encode, msgdef, buf, offset, kwargs):
if encode:
@@ -120,10 +131,7 @@ class VPP():
if k in kwargs:
if type(v) is list:
if callable(v[1]):
- if v[0] in kwargs:
- e = kwargs[v[0]]
- else:
- e = v[0]
+ e = kwargs[v[0]] if v[0] in kwargs else v[0]
size = 0
for i in range(e):
size += v[1](self, True, buf, off + size,
@@ -179,7 +187,7 @@ class VPP():
if callable(v[1]): # compound type
size = 0
if v[0] in msgdef['args']: # vla
- e = int(res[-1])
+ e = res[v[2]]
else: # fixed array
e = v[0]
res.append(lst)
@@ -188,14 +196,19 @@ class VPP():
lst.append(l)
size += s
continue
-
if v[1].size == 1:
- size = int(res[-1])
+ if type(v[0]) is int:
+ size = len(buf) - off
+ else:
+ size = res[v[2]]
res.append(buf[off:off + size])
else:
- e = int(res[-1])
+ e = v[0] if type(v[0]) is int else res[v[2]]
+ if e == -1:
+ e = (len(buf) - off) / v[1].size
if e == 0:
- raise ValueError
+ raise ValueError(1,
+ 'Variable length array, empty length: ' + k)
lst = []
res.append(lst)
size = 0
@@ -226,14 +239,18 @@ class VPP():
argtypes = collections.OrderedDict()
fields = []
msg = {}
- for f in msgdef:
+ 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)
args[field_name] = self.__struct(*f)
argtypes[field_name] = field_type
+ if len(f) == 4: # Find offset to # elements field
+ args[field_name].append(args.keys().index(f[3]) - i)
fields.append(field_name)
msg['return_tuple'] = collections.namedtuple(name, fields,
rename = True)
@@ -243,7 +260,7 @@ class VPP():
return self.messages[name]
def add_type(self, name, typedef):
- self.add_message('vl_api_' + name + '_t', typedef)
+ return self.add_message('vl_api_' + name + '_t', typedef)
def make_function(self, name, i, msgdef, multipart, async):
if (async):