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#
# socket.py for mac - Emulate socket module with mactcp and macdnr
#
# Jack Jansen, CWI, November 1994
#
import mactcp
import MACTCP
import macdnr
import sys
#
# Constants
#
_myerror = 'socket_wrapper.error'
error = (mactcp.error, macdnr.error, _myerror)
SOCK_DGRAM=1
SOCK_STREAM=2
AF_INET=1
#
# Internal constants
#
_BUFSIZE=4096 # Size of tcp/udp input buffer
_connectionClosing=-42 # XXXX
_myaddress=None
_myname=None
_myaddrstr=None
def _myipaddress():
global _myaddress
if _myaddress == None:
_myaddress = mactcp.IPAddr()
return _myaddress
def _ipaddress(str):
if type(str) == type(1):
return str # Already numeric
ptr = macdnr.StrToAddr(str)
ptr.wait()
return ptr.ip0
def gethostbyname(str):
id = _ipaddress(str)
return macdnr.AddrToStr(id)
def gethostname():
global _myname
if _myname == None:
id = _myipaddress()
ptr = macdnr.AddrToName(id)
ptr.wait()
_myname = ptr.cname
return _myname
def _gethostaddress():
global _myaddrstr
if _myaddrstr == None:
id = _myipaddress()
_myaddrstr = macdnr.AddrToStr(id)
return _myaddrstr
def socket(family, type, *which):
if family <> AF_INET:
raise my_error, 'Protocol family not supported'
if type == SOCK_DGRAM:
return _udpsocket()
elif type == SOCK_STREAM:
return _tcpsocket()
raise my_error, 'Protocol type not supported'
def fromfd(*args):
raise my_error, 'Operation not supported on a mac'
class _socket:
def accept(self, *args):
raise my_error, 'Operation not supported on this socket'
bind = accept
close = accept
connect = accept
fileno = accept
getpeername = accept
getsockname = accept
getsockopt = accept
listen = accept
recv = accept
recvfrom = accept
send = accept
sendto = accept
setblocking = accept
setsockopt = accept
shutdown = accept
class _tcpsocket(_socket):
def __init__(self):
self.stream = mactcp.TCPCreate(_BUFSIZE)
##self.stream.asr = self.asr
self.databuf = ''
self.udatabuf = ''
self.port = 0
self.accepted = 0
self.listening = 0
def accept(self):
if not self.listening:
raise my_error, 'Not listening'
self.listening = 0
self.stream.wait()
self.accepted = 1
return self, self.getsockname()
def bind(self, host, port):
self.port = port
def close(self):
if self.accepted:
self.accepted = 0
return
self.stream.Abort()
def connect(self, host, port):
self.stream.ActiveOpen(self.port, _ipaddress(host), port)
def getsockname(self):
st = self.stream.Status()
host = macdnr.AddrToStr(st.localHost)
return host, st.localPort
def getpeername(self):
st = self.stream.Status()
host = macdnr.AddrToStr(st.remoteHost)
return host, st.remotePort
def listen(self, backlog):
self.stream.PassiveOpen(self.port)
self.listening = 1
def makefile(self, rw):
return _socketfile(self)
def recv(self, bufsize, flags=0):
if flags:
raise my_error, 'recv flags not yet supported on mac'
if not self.databuf:
try:
self.databuf, urg, mark = self.stream.Rcv(0)
if not self.databuf:
print '** socket: no data!'
print '** recv: got ', len(self.databuf)
except mactcp.error, arg:
if arg[0] != MACTCP.connectionClosing:
raise mactcp.error, arg
rv = self.databuf[:bufsize]
self.databuf = self.databuf[bufsize:]
return rv
def send(self, buf):
self.stream.Send(buf)
return len(buf)
def shutdown(self, how):
if how == 0:
return
self.stream.Close()
def bytes_readable(self):
st = self.stream.Status()
return st.amtUnreadData
def bytes_writeable(self):
st = self.stream.Status()
return st.sendWindow - st.sendUnacked;
class _udpsocket(_socket):
def __init__(self):
pass
class _socketfile:
def __init__(self, sock):
self.sock = sock
self.buf = ''
def read(self, *arg):
if arg:
length = arg
else:
length = 0x7fffffff
while len(self.buf) < length:
new = self.sock.recv(0x7fffffff)
if not new:
break
self.buf = self.buf + new
rv = self.buf[:length]
self.buf = self.buf[length:]
return rv
def readline(self):
import string
while not '\n' in self.buf:
new = self.sock.recv(0x7fffffff)
if not new:
break
self.buf = self.buf + new
if not '\n' in self.buf:
rv = self.buf
self.buf = ''
else:
i = string.index(self.buf, '\n')
rv = self.buf[:i+1]
self.buf = self.buf[i+1:]
print '** Readline:',self, `rv`
return rv
def write(self, buf):
self.sock.send(buf)
def close(self):
self.sock.close()
del self.sock
def __test_tcp():
s = socket(AF_INET, SOCK_STREAM)
s.connect('poseidon.cwi.nl', 13)
rv = s.recv(1000)
print 'Time/date:', rv
rv = s.recv(1000)
if rv:
print 'Unexpected extra data:', rv
s.close()
def __test_udp():
s = socket(AF_INET, SOCK_DGRAM)
print 'Sending data... (hello world)'
s.sendto(('poseidon.cwi.nl', 7), 'hello world')
rv, host = s.recvfrom(1000)
print 'Got from ', host, ':', rv
|
