-
Notifications
You must be signed in to change notification settings - Fork 9
Expand file tree
/
Copy pathsocket.py
More file actions
397 lines (340 loc) · 12.5 KB
/
socket.py
File metadata and controls
397 lines (340 loc) · 12.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
#!/usr/bin/env python3
# -*- coding:utf-8 -*-
"""
"""
from __future__ import print_function, division, absolute_import
import os
import errno
import socket as _socket
import struct
from ._util import copy_globals
from ._compat import integer_types, binary_type
from ._fstack import ffi, lib
# import attributes from builtin socket module
def __key_check_fn(k):
includes = (
'ntohl',
'ntohs',
'htonl',
'htons',
'inet_aton',
'inet_ntoa',
'inet_pton',
'inet_ntop',
)
if k in includes:
return True
if k.isupper():
return True
return False
copy_globals(_socket, globals(),
ignore_missing_names=True,
key_check_fn=__key_check_fn)
def retry_intr(fn, *args, **kwargs):
while True:
res = fn(*args, **kwargs)
if res < 0 and ffi.errno == errno.EINTR:
continue
break
return res
class error(IOError):
def __init__(self, prefix):
self.prefix = prefix
self.errno = ffi.errno
def __str__(self):
return "%s %s" % (self.prefix, os.strerror(self.errno))
timeout = error
def _gen_sockaddr(af, address):
ip_s, port = address[0], address[1]
ip = _socket.inet_pton(af, ip_s)
if af == AF_INET:
assert len(ip) == 4
addr = ffi.new("struct sockaddr_in*")
addrlen = ffi.sizeof("struct sockaddr_in")
c_ip = ffi.new("char[4]", ip)
lib.py_init_ipv4_addr(port, c_ip, addr)
elif af == AF_INET6:
assert len(ip) == 16
addr = ffi.new("struct sockaddr_in6*")
addrlen = ffi.sizeof("struct sockaddr_in6")
c_ip = ffi.new("char[16]", ip)
lib.py_init_ipv6_addr(port, c_ip, addr)
else:
raise ValueError("unsupport family.")
return addr, addrlen
def _gen_empty_sockaddr(af):
if af == AF_INET:
addr = ffi.new("struct sockaddr_in*")
sz = ffi.sizeof("struct sockaddr_in")
elif af == AF_INET6:
addr = ffi.new("struct sockaddr_in6*")
sz = ffi.sizeof("struct sockaddr_in6")
else:
raise ValueError("unsupport family.")
addrlenp = ffi.new("socklen_t*", sz)
return addr, addrlenp
def _parse_sockaddr(sockaddr, addrlenp):
addrlen = addrlenp[0]
af = sockaddr.sa_family
if af == AF_INET:
assert addrlen == ffi.sizeof("struct sockaddr_in")
addr = ffi.cast("struct sockaddr_in*", sockaddr)
c_port = ffi.new("unsigned short*")
c_ip = ffi.new("char[4]")
lib.py_parse_ipv4_addr(c_port, c_ip, addr)
elif af == AF_INET6:
addr = ffi.cast("struct sockaddr_in6*", sockaddr)
c_port = ffi.new("unsigned short*")
c_ip = ffi.new("char[16]")
lib.py_parse_ipv6_addr(c_port, c_ip, addr)
else:
raise ValueError("unsupport family.")
ip = bytes(ffi.buffer(c_ip))
s_ip = _socket.inet_ntop(af, ip)
port = c_port[0]
return s_ip, port
def _parse_anc_buf(buf, size):
socklen_size = ffi.sizeof("socklen_t")
start = buf
res = []
while len(start) > 0:
if socklen_size == 4:
m_size, cmsg_level, cmsg_type = struct.unpack("=iii", start)
cmsg_data = start[12:m_size]
elif socklen_size == 8:
m_size, cmsg_level, cmsg_type = struct.unpack("=qii", start)
cmsg_data = start[16:m_size]
else:
raise RuntimeError()
res.append((cmsg_level, cmsg_type, cmsg_data))
return res
def _gen_anc_buf(anc_list):
socklen_size = ffi.sizeof("socklen_t")
res = []
for cmsg_level, cmsg_type, cmsg_data in anc_list:
if socklen_size == 4:
totallen = 12 + len(cmsg_data)
bb = struct.pack("=iii", totallen, cmsg_level, cmsg_type)
res.append(bb + cmsg_data)
elif socklen_size == 8:
totallen = 16 + len(cmsg_data)
bb = struct.pack("=iii", totallen, cmsg_level, cmsg_type)
res.append(bb + cmsg_data)
else:
raise RuntimeError()
return b''.join(res)
class socket(object):
def __init__(self, family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None):
self.family = family
self.type = type
self.proto = proto
if fileno is None:
self.fd = lib.ff_socket(family, type, proto)
else:
self.fd = fileno
def fileno(self):
return self.fd
def setsockopt(self, level, optname, value):
if isinstance(value, binary_type):
buflen = len(value)
optval = ffi.new("char[]", value)
elif isinstance(value, integer_types):
# integer
buflen = 4
optval = ffi.new("int*", value)
else:
raise ValueError("value should be int or bytes in setsockopt")
ret = lib.ff_setsockopt(self.fd, level, optname, optval, buflen)
if ret < 0:
raise error("setsockopt: ")
return ret
def getsockopt(self, level, optname, buflen=None):
if buflen is None:
is_int = True
buflen = 4
optval = ffi.new("int*")
else:
is_int = False
optval = ffi.new("char[]", buflen)
optlen = ffi.new("socklen_t*", buflen)
ret = lib.ff_getsockopt(self.fd, level, optname, optval, optlen)
if ret < 0:
raise error("getsockopt: ")
if is_int:
return optval[0]
else:
buf = ffi.buffer(optval, optlen[0])
return bytes(buf)
def listen(self, backlog=-1):
if backlog < 0:
backlog = min(SOMAXCONN, 128)
res = lib.ff_listen(self.fd, backlog)
if res < 0:
raise error("listen:")
def bind(self, address):
addr, addrlen = _gen_sockaddr(self.family, address)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
res = lib.ff_bind(self.fd, sockaddr, addrlen)
if res < 0:
raise error("bind: ")
def accept(self):
addr, addrlen_p = _gen_empty_sockaddr(AF_INET6)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
fd = retry_intr(lib.ff_accept, self.fd, sockaddr, addrlen_p)
if fd < 0:
raise error("accept:")
sock = socket(self.family, self.type, self.proto, fd)
address = _parse_sockaddr(sockaddr, addrlen_p)
return sock, address
def connect(self, address):
addr, addrlen = _gen_sockaddr(self.family, address)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
ret = lib.ff_connect(self.fd, sockaddr, addrlen)
if ret < 0:
raise error("connect: ")
def connect_ex(self, address):
addr, addrlen = _gen_sockaddr(self.family, address)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
return lib.ff_connect(self.fd, sockaddr, addrlen)
def close(self):
res = lib.ff_close(self.fd)
if res < 0 and ffi.errno != errno.ECONNRESET:
raise error("close: ")
def shutdown(self, how):
res = lib.ff_shutdown(self.fd, how)
if res < 0:
raise error("shutdown: ")
def getpeername(self):
addr, addrlen_p = _gen_empty_sockaddr(AF_INET6)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
ret = lib.ff_getpeername(self.fd, sockaddr, addrlen_p)
if ret < 0:
raise error("getpeername: ")
return _parse_sockaddr(sockaddr, addrlen_p)
def getsockname(self):
addr, addrlen_p = _gen_empty_sockaddr(AF_INET6)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
ret = lib.ff_getsockname(self.fd, sockaddr, addrlen_p)
if ret < 0:
raise error("getsockname: ")
return _parse_sockaddr(sockaddr, addrlen_p)
def recv(self, bufsize, flags=0):
if bufsize < 0:
raise ValueError("negative buffersize in recv")
cbuf = ffi.new("char[]", bufsize)
n = retry_intr(lib.ff_recv, self.fd, cbuf, bufsize, flags)
if n < 0:
raise error("recv: ")
buf = ffi.buffer(cbuf, n)
return bytes(buf)
def recv_into(self, buf, nbytes=0, flags=0):
if nbytes == 0:
nbytes = len(buf)
cbuf = ffi.from_buffer(buf)
n = retry_intr(lib.ff_recv, self.fd, cbuf, nbytes, flags)
if n < 0:
raise error("recv: ")
return n
def recvfrom(self, bufsize, flags=0):
if bufsize < 0:
raise ValueError("negative buffersize in recvfrom")
addr, addrlen_p = _gen_empty_sockaddr(AF_INET6)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
cbuf = ffi.new("char[]", bufsize)
n = retry_intr(lib.ff_recvfrom, self.fd, cbuf, bufsize,
flags, sockaddr, addrlen_p)
if n < 0:
raise error("recvfrom: ")
buf = ffi.buffer(cbuf, n)
address = _parse_sockaddr(sockaddr, addrlen_p)
return bytes(buf), address
def recvfrom_into(self, buf, nbytes=0, flags=0):
if nbytes == 0:
nbytes = len(buf)
cbuf = ffi.from_buffer(buf)
if nbytes < 0:
raise ValueError("negative buffersize in recvfrom")
addr, addrlen_p = _gen_empty_sockaddr(AF_INET6)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
n = retry_intr(lib.ff_recvfrom, self.fd, cbuf, nbytes,
flags, sockaddr, addrlen_p)
if n < 0:
raise error("recvfrom: ")
address = _parse_sockaddr(sockaddr, addrlen_p)
return n, address
def recvmsg(self, bufsize, ancbufsize=0, flags=0):
if bufsize < 0:
raise ValueError("negative buffersize in recvfrom")
if ancbufsize < 0:
raise ValueError("negative ancbufsize in recvfrom")
addr, addrlen_p = _gen_empty_sockaddr(AF_INET6)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
cbuf = ffi.new("char[]", bufsize)
if ancbufsize > 0:
c_ancbuf = ffi.new("char[]", ancbufsize)
else:
c_ancbuf = ffi.NULL
c_ancbuf_len = ffi.new("int*", ancbufsize)
c_flags = ffi.new("int*", flags)
n = retry_intr(lib.py_recvmsg, self.fd, cbuf, bufsize, c_ancbuf,
c_ancbuf_len, c_flags, sockaddr, addrlen_p)
if n < 0:
raise error("recvmsg:")
address = _parse_sockaddr(sockaddr, addrlen_p)
flags = c_flags[0]
buf = ffi.buffer(cbuf, n)
ancbuf = ffi.buffer(c_ancbuf, c_ancbuf_len[0])
ancdata = _parse_anc_buf(bytes(ancbuf))
return bytes(buf), ancdata, flags, address
def send(self, data, flags=0):
n = retry_intr(lib.ff_send, self.fd, data, len(data), flags)
if n < 0:
raise error("send: ")
return n
def sendto(self, data, *args):
if len(args) == 1:
flags = 0
address = args[0]
elif len(args) == 2:
flags = args[0]
address = args[1]
else:
raise TypeError("sendto takes at most 3 arguments(%d given)" %
(len(args) + 1))
addr, addrlen = _gen_sockaddr(self.family, address)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
n = retry_intr(lib.ff_send, self.fd, data, len(data),
flags, sockaddr, addrlen)
if n < 0:
raise error("sendto: ")
return n
def sendmsg(self, buffers, ancdata=0, flags=0, address=None):
nbuffers = len(buffers)
ancbuf = _gen_anc_buf(ancdata)
c_ancbuf = ffi.from_buffer(ancbuf)
cbuf_list = [ffi.from_buffer(buf) for buf in buffers]
c_bufv = ffi.new("char *[]", cbuf_list)
c_lenarr = ffi.new("int[]", [len(buf) for buf in buffers])
if address is None:
sockaddr = ffi.NULL
addrlen = 0
else:
addr, addrlen = _gen_sockaddr(self.family, address)
sockaddr = ffi.cast("struct linux_sockaddr*", addr)
res = retry_intr(lib.py_sendmsg, self.fd, c_bufv, c_lenarr, nbuffers,
c_ancbuf, len(ancbuf), flags, sockaddr, addrlen)
if res < 0:
raise error("sendmsg: ")
return res
def setblocking(self, blocking):
flag = 1 if blocking else 0
res = lib.py_setblocking(self.fd, flag)
if res < 0:
raise error("setblocking: ")
def socketpair(family, type, proto):
sv = ffi.new("int[2]")
ret = lib.ff_socketpair(family, type, proto, sv)
if ret < 0:
raise error("socketpair:")
fd1, fd2 = sv[0], sv[1]
return socket(family, type, proto, fd1), socket(family, type, proto, fd2)