305 lines
6.2 KiB
Python
305 lines
6.2 KiB
Python
"""socket.py for mac - Emulate socket module with mactcp and macdnr
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Currently only implements TCP sockets (AF_INET, SOCK_STREAM).
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Esoteric things like socket options don't work,
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but getpeername() and makefile() do work; everything used by ftplib works!
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"""
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# Jack Jansen, CWI, November 1994 (initial version)
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# Guido van Rossum, CWI, March 1995 (bug fixes and lay-out)
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import mactcp
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import MACTCPconst
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import macdnr
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# Exported constants
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_myerror = 'socket_wrapper.error'
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error = (mactcp.error, macdnr.error, _myerror)
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SOCK_DGRAM = 1
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SOCK_STREAM = 2
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AF_INET = 1
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# Internal constants
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_BUFSIZE = 15*1024 # Size of TCP/UDP input buffer
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_myaddress = None
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_myname = None
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_myaddrstr = None
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def _myipaddress():
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global _myaddress
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if _myaddress == None:
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_myaddress = mactcp.IPAddr()
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return _myaddress
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def _ipaddress(str):
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if type(str) == type(1):
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return str # Already numeric
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ptr = macdnr.StrToAddr(str)
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ptr.wait()
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return ptr.ip0
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def gethostbyname(str):
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id = _ipaddress(str)
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return macdnr.AddrToStr(id)
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def gethostbyaddr(str):
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id = _ipaddress(str)
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ptr = macdnr.AddrToName(id)
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ptr.wait()
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name = ptr.cname
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if name[-1:] == '.': name = name[:-1]
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names, addresses = [], [str]
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return name, names, addresses
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def gethostname():
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global _myname
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if _myname == None:
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id = _myipaddress()
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ptr = macdnr.AddrToName(id)
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ptr.wait()
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_myname = ptr.cname
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return _myname
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def _gethostaddress():
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global _myaddrstr
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if _myaddrstr == None:
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id = _myipaddress()
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_myaddrstr = macdnr.AddrToStr(id)
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return _myaddrstr
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def socket(family, type, *which):
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if family <> AF_INET:
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raise _myerror, 'Protocol family %d not supported' % type
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if type == SOCK_DGRAM:
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return _udpsocket()
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elif type == SOCK_STREAM:
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return _tcpsocket()
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raise _myerror, 'Protocol type %d not supported' % type
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def fromfd(*args):
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raise _myerror, 'Operation not supported on a mac'
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class _socket:
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def unsupported(self, *args):
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raise _myerror, 'Operation not supported on this socket'
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accept = unsupported
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bind = unsupported
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close = unsupported
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connect = unsupported
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fileno = unsupported
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getpeername = unsupported
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getsockname = unsupported
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getsockopt = unsupported
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listen = unsupported
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recv = unsupported
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recvfrom = unsupported
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send = unsupported
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sendto = unsupported
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setblocking = unsupported
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setsockopt = unsupported
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shutdown = unsupported
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class _tcpsocket(_socket):
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def __init__(self):
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self.stream = mactcp.TCPCreate(_BUFSIZE)
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##self.stream.asr = self.asr
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self.databuf = ''
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self.udatabuf = ''
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self.port = 0
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self.accepted = 0
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self.listening = 0
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def accept(self):
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if not self.listening:
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raise _myerror, 'Not listening'
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self.listening = 0
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self.stream.wait()
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self.accepted = 1
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return self, self.getsockname()
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# bind has two ways of calling: s.bind(host, port) or s.bind((host, port));
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# the latter is more proper but the former more common
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def bind(self, a1, a2=None):
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if a2 is None:
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host, port = a1
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else:
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host, port = a1, a2
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self.port = port
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def close(self):
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if self.accepted:
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self.accepted = 0
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return
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self.stream.Abort()
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# connect has the same problem as bind (see above)
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def connect(self, a1, a2=None):
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if a2 is None:
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host, port = a1
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else:
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host, port = a1, a2
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self.stream.ActiveOpen(self.port, _ipaddress(host), port)
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def getsockname(self):
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host, port = self.stream.GetSockName()
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host = macdnr.AddrToStr(host)
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return host, port
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def getpeername(self):
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st = self.stream.Status()
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host = macdnr.AddrToStr(st.remoteHost)
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return host, st.remotePort
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def listen(self, backlog):
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self.stream.PassiveOpen(self.port)
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self.listening = 1
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def makefile(self, rw = 'r', bs = 512):
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return _socketfile(self, rw, bs)
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def recv(self, bufsize, flags=0):
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if flags:
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raise _myerror, 'recv flags not yet supported on mac'
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if not self.databuf:
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try:
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self.databuf, urg, mark = self.stream.Rcv(0)
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except mactcp.error, arg:
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if arg[0] != MACTCPconst.connectionClosing:
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raise mactcp.error, arg
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rv = self.databuf[:bufsize]
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self.databuf = self.databuf[bufsize:]
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return rv
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def send(self, buf):
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self.stream.Send(buf)
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return len(buf)
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def shutdown(self, how):
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if how == 0:
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return
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self.stream.Close()
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def bytes_readable(self):
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st = self.stream.Status()
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return st.amtUnreadData
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def bytes_writeable(self):
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st = self.stream.Status()
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return st.sendWindow - st.sendUnacked;
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class _udpsocket(_socket):
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def __init__(self):
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pass
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class _socketfile:
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def __init__(self, sock, rw, bs):
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if rw[1:] == 'b': rw = rw[:1]
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if rw not in ('r', 'w'): raise _myerror, "mode must be 'r' or 'w'"
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self.sock = sock
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self.rw = rw
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self.bs = bs
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self.buf = ''
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def read(self, length = -1):
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if length < 0:
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length = 0x7fffffff
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while len(self.buf) < length:
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new = self.sock.recv(0x7fffffff)
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if not new:
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break
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self.buf = self.buf + new
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rv = self.buf[:length]
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self.buf = self.buf[length:]
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return rv
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def readline(self):
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import string
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while not '\n' in self.buf:
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new = self.sock.recv(0x7fffffff)
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if not new:
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break
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self.buf = self.buf + new
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if not '\n' in self.buf:
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rv = self.buf
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self.buf = ''
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else:
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i = string.index(self.buf, '\n')
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rv = self.buf[:i+1]
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self.buf = self.buf[i+1:]
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return rv
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def readlines(self):
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list = []
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line = self.readline()
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while line:
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list.append(line)
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line = self.readline()
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return list
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def write(self, buf):
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BS = self.bs
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if len(buf) >= BS:
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self.flush()
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self.sock.send(buf)
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elif len(buf) + len(self.buf) >= BS:
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self.flush()
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self.buf = buf
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else:
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self.buf = self.buf + buf
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def writelines(self, list):
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for line in list:
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self.write(line)
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def flush(self):
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if self.buf and self.rw == 'w':
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self.sock.send(self.buf)
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self.buf = ''
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def close(self):
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self.flush()
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##self.sock.close()
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del self.sock
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def __test_tcp():
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s = socket(AF_INET, SOCK_STREAM)
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s.connect('poseidon.cwi.nl', 13)
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rv = s.recv(1000)
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print 'Time/date:', rv
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rv = s.recv(1000)
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if rv:
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print 'Unexpected extra data:', rv
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s.close()
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def __test_udp():
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s = socket(AF_INET, SOCK_DGRAM)
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print 'Sending data... (hello world)'
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s.sendto(('poseidon.cwi.nl', 7), 'hello world')
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rv, host = s.recvfrom(1000)
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print 'Got from ', host, ':', rv
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