249 lines
7.3 KiB
Python
249 lines
7.3 KiB
Python
# Wrapper module for _socket, providing some additional facilities
|
|
# implemented in Python.
|
|
|
|
"""\
|
|
This module provides socket operations and some related functions.
|
|
On Unix, it supports IP (Internet Protocol) and Unix domain sockets.
|
|
On other systems, it only supports IP. Functions specific for a
|
|
socket are available as methods of the socket object.
|
|
|
|
Functions:
|
|
|
|
socket() -- create a new socket object
|
|
fromfd() -- create a socket object from an open file descriptor [*]
|
|
gethostname() -- return the current hostname
|
|
gethostbyname() -- map a hostname to its IP number
|
|
gethostbyaddr() -- map an IP number or hostname to DNS info
|
|
getservbyname() -- map a service name and a protocol name to a port number
|
|
getprotobyname() -- mape a protocol name (e.g. 'tcp') to a number
|
|
ntohs(), ntohl() -- convert 16, 32 bit int from network to host byte order
|
|
htons(), htonl() -- convert 16, 32 bit int from host to network byte order
|
|
inet_aton() -- convert IP addr string (123.45.67.89) to 32-bit packed format
|
|
inet_ntoa() -- convert 32-bit packed format IP to string (123.45.67.89)
|
|
ssl() -- secure socket layer support (only available if configured)
|
|
|
|
[*] not available on all platforms!
|
|
|
|
Special objects:
|
|
|
|
SocketType -- type object for socket objects
|
|
error -- exception raised for I/O errors
|
|
|
|
Integer constants:
|
|
|
|
AF_INET, AF_UNIX -- socket domains (first argument to socket() call)
|
|
SOCK_STREAM, SOCK_DGRAM, SOCK_RAW -- socket types (second argument)
|
|
|
|
Many other constants may be defined; these may be used in calls to
|
|
the setsockopt() and getsockopt() methods.
|
|
"""
|
|
|
|
from _socket import *
|
|
|
|
import os, sys
|
|
|
|
__all__ = ["getfqdn"]
|
|
import _socket
|
|
__all__.extend(os._get_exports_list(_socket))
|
|
del _socket
|
|
|
|
if (sys.platform.lower().startswith("win")
|
|
or (hasattr(os, 'uname') and os.uname()[0] == "BeOS")
|
|
or (sys.platform=="RISCOS")):
|
|
|
|
# be sure this happens only once, even in the face of reload():
|
|
try:
|
|
_realsocketcall
|
|
except NameError:
|
|
_realsocketcall = socket
|
|
|
|
def socket(family, type, proto=0):
|
|
return _socketobject(_realsocketcall(family, type, proto))
|
|
|
|
|
|
# WSA error codes
|
|
if sys.platform.lower().startswith("win"):
|
|
errorTab = {}
|
|
errorTab[10004] = "The operation was interrupted."
|
|
errorTab[10009] = "A bad file handle was passed."
|
|
errorTab[10013] = "Permission denied."
|
|
errorTab[10014] = "A fault occurred on the network??" # WSAEFAULT
|
|
errorTab[10022] = "An invalid operation was attempted."
|
|
errorTab[10035] = "The socket operation would block"
|
|
errorTab[10036] = "A blocking operation is already in progress."
|
|
errorTab[10048] = "The network address is in use."
|
|
errorTab[10054] = "The connection has been reset."
|
|
errorTab[10058] = "The network has been shut down."
|
|
errorTab[10060] = "The operation timed out."
|
|
errorTab[10061] = "Connection refused."
|
|
errorTab[10063] = "The name is too long."
|
|
errorTab[10064] = "The host is down."
|
|
errorTab[10065] = "The host is unreachable."
|
|
del os, sys
|
|
|
|
|
|
def getfqdn(name=''):
|
|
"""Get fully qualified domain name from name.
|
|
|
|
An empty argument is interpreted as meaning the local host.
|
|
|
|
First the hostname returned by gethostbyaddr() is checked, then
|
|
possibly existing aliases. In case no FQDN is available, hostname
|
|
is returned.
|
|
"""
|
|
name = name.strip()
|
|
if not name or name == '0.0.0.0':
|
|
name = gethostname()
|
|
try:
|
|
hostname, aliases, ipaddrs = gethostbyaddr(name)
|
|
except error:
|
|
pass
|
|
else:
|
|
aliases.insert(0, hostname)
|
|
for name in aliases:
|
|
if '.' in name:
|
|
break
|
|
else:
|
|
name = hostname
|
|
return name
|
|
|
|
|
|
#
|
|
# These classes are used by the socket() defined on Windows and BeOS
|
|
# platforms to provide a best-effort implementation of the cleanup
|
|
# semantics needed when sockets can't be dup()ed.
|
|
#
|
|
# These are not actually used on other platforms.
|
|
#
|
|
|
|
class _socketobject:
|
|
|
|
def __init__(self, sock):
|
|
self._sock = sock
|
|
|
|
def close(self):
|
|
self._sock = 0
|
|
|
|
def __del__(self):
|
|
self.close()
|
|
|
|
def accept(self):
|
|
sock, addr = self._sock.accept()
|
|
return _socketobject(sock), addr
|
|
|
|
def dup(self):
|
|
return _socketobject(self._sock)
|
|
|
|
def makefile(self, mode='r', bufsize=-1):
|
|
return _fileobject(self._sock, mode, bufsize)
|
|
|
|
_s = "def %s(self, *args): return apply(self._sock.%s, args)\n\n"
|
|
for _m in ('bind', 'connect', 'connect_ex', 'fileno', 'listen',
|
|
'getpeername', 'getsockname',
|
|
'getsockopt', 'setsockopt',
|
|
'recv', 'recvfrom', 'send', 'sendto',
|
|
'setblocking',
|
|
'shutdown'):
|
|
exec _s % (_m, _m)
|
|
|
|
|
|
class _fileobject:
|
|
|
|
def __init__(self, sock, mode, bufsize):
|
|
self._sock = sock
|
|
self._mode = mode
|
|
if bufsize < 0:
|
|
bufsize = 512
|
|
self._rbufsize = max(1, bufsize)
|
|
self._wbufsize = bufsize
|
|
self._wbuf = self._rbuf = ""
|
|
|
|
def close(self):
|
|
try:
|
|
if self._sock:
|
|
self.flush()
|
|
finally:
|
|
self._sock = 0
|
|
|
|
def __del__(self):
|
|
self.close()
|
|
|
|
def flush(self):
|
|
if self._wbuf:
|
|
self._sock.send(self._wbuf)
|
|
self._wbuf = ""
|
|
|
|
def fileno(self):
|
|
return self._sock.fileno()
|
|
|
|
def write(self, data):
|
|
self._wbuf = self._wbuf + data
|
|
if self._wbufsize == 1:
|
|
if '\n' in data:
|
|
self.flush()
|
|
else:
|
|
if len(self._wbuf) >= self._wbufsize:
|
|
self.flush()
|
|
|
|
def writelines(self, list):
|
|
filter(self._sock.send, list)
|
|
self.flush()
|
|
|
|
def read(self, n=-1):
|
|
if n >= 0:
|
|
k = len(self._rbuf)
|
|
if n <= k:
|
|
data = self._rbuf[:n]
|
|
self._rbuf = self._rbuf[n:]
|
|
return data
|
|
n = n - k
|
|
L = [self._rbuf]
|
|
self._rbuf = ""
|
|
while n > 0:
|
|
new = self._sock.recv(max(n, self._rbufsize))
|
|
if not new: break
|
|
k = len(new)
|
|
if k > n:
|
|
L.append(new[:n])
|
|
self._rbuf = new[n:]
|
|
break
|
|
L.append(new)
|
|
n = n - k
|
|
return "".join(L)
|
|
k = max(512, self._rbufsize)
|
|
L = [self._rbuf]
|
|
self._rbuf = ""
|
|
while 1:
|
|
new = self._sock.recv(k)
|
|
if not new: break
|
|
L.append(new)
|
|
k = min(k*2, 1024**2)
|
|
return "".join(L)
|
|
|
|
def readline(self, limit=-1):
|
|
data = ""
|
|
i = self._rbuf.find('\n')
|
|
while i < 0 and not (0 < limit <= len(self._rbuf)):
|
|
new = self._sock.recv(self._rbufsize)
|
|
if not new: break
|
|
i = new.find('\n')
|
|
if i >= 0: i = i + len(self._rbuf)
|
|
self._rbuf = self._rbuf + new
|
|
if i < 0: i = len(self._rbuf)
|
|
else: i = i+1
|
|
if 0 <= limit < len(self._rbuf): i = limit
|
|
data, self._rbuf = self._rbuf[:i], self._rbuf[i:]
|
|
return data
|
|
|
|
def readlines(self, sizehint = 0):
|
|
total = 0
|
|
list = []
|
|
while 1:
|
|
line = self.readline()
|
|
if not line: break
|
|
list.append(line)
|
|
total += len(line)
|
|
if sizehint and total >= sizehint:
|
|
break
|
|
return list
|