/* Socket module */



/*



This module provides an interface to Berkeley socket IPC.



Limitations:



- Only AF_INET, AF_INET6 and AF_UNIX address families are supported in a

  portable manner, though AF_PACKET is supported under Linux.

- No read/write operations (use sendall/recv or makefile instead).

- Additional restrictions apply on some non-Unix platforms (compensated

  for by socket.py).



Module interface:



- socket.error: exception raised for socket specific errors

- socket.gaierror: exception raised for getaddrinfo/getnameinfo errors,

	a subclass of socket.error

- socket.herror: exception raised for gethostby* errors,

	a subclass of socket.error

- socket.fromfd(fd, family, type[, proto]) --> new socket object (created

        from an existing file descriptor)

- socket.gethostbyname(hostname) --> host IP address (string: 'dd.dd.dd.dd')

- socket.gethostbyaddr(IP address) --> (hostname, [alias, ...], [IP addr, ...])

- socket.gethostname() --> host name (string: 'spam' or 'spam.domain.com')

- socket.getprotobyname(protocolname) --> protocol number

- socket.getservbyname(servicename, protocolname) --> port number

- socket.socket([family[, type [, proto]]]) --> new socket object

- socket.ntohs(16 bit value) --> new int object

- socket.ntohl(32 bit value) --> new int object

- socket.htons(16 bit value) --> new int object

- socket.htonl(32 bit value) --> new int object

- socket.getaddrinfo(host, port [, family, socktype, proto, flags])

	--> List of (family, socktype, proto, canonname, sockaddr)

- socket.getnameinfo(sockaddr, flags) --> (host, port)

- socket.AF_INET, socket.SOCK_STREAM, etc.: constants from <socket.h>

- socket.has_ipv6: boolean value indicating if IPv6 is supported

- socket.inet_aton(IP address) -> 32-bit packed IP representation

- socket.inet_ntoa(packed IP) -> IP address string

- socket.getdefaulttimeout() -> None | float

- socket.setdefaulttimeout(None | float)

- an Internet socket address is a pair (hostname, port)

  where hostname can be anything recognized by gethostbyname()

  (including the dd.dd.dd.dd notation) and port is in host byte order

- where a hostname is returned, the dd.dd.dd.dd notation is used

- a UNIX domain socket address is a string specifying the pathname

- an AF_PACKET socket address is a tuple containing a string

  specifying the ethernet interface and an integer specifying

  the Ethernet protocol number to be received. For example:

  ("eth0",0x1234).  Optional 3rd,4th,5th elements in the tuple

  specify packet-type and ha-type/addr -- these are ignored by

  networking code, but accepted since they are returned by the

  getsockname() method.



Local naming conventions:



- names starting with sock_ are socket object methods

- names starting with socket_ are module-level functions

- names starting with PySocket are exported through socketmodule.h



*/



#include "Python.h"



#undef MAX

#define MAX(x, y) ((x) < (y) ? (y) : (x))



/* Socket object documentation */

PyDoc_STRVAR(sock_doc,

"socket([family[, type[, proto]]]) -> socket object\n\

\n\

Open a socket of the given type.  The family argument specifies the\n\

address family; it defaults to AF_INET.  The type argument specifies\n\

whether this is a stream (SOCK_STREAM, this is the default)\n\

or datagram (SOCK_DGRAM) socket.  The protocol argument defaults to 0,\n\

specifying the default protocol.  Keyword arguments are accepted.\n\

\n\

A socket object represents one endpoint of a network connection.\n\

\n\

Methods of socket objects (keyword arguments not allowed):\n\

\n\

accept() -- accept a connection, returning new socket and client address\n\

bind(addr) -- bind the socket to a local address\n\

close() -- close the socket\n\

connect(addr) -- connect the socket to a remote address\n\

connect_ex(addr) -- connect, return an error code instead of an exception\n\

dup() -- return a new socket object identical to the current one [*]\n\

fileno() -- return underlying file descriptor\n\

getpeername() -- return remote address [*]\n\

getsockname() -- return local address\n\

getsockopt(level, optname[, buflen]) -- get socket options\n\

gettimeout() -- return timeout or None\n\

listen(n) -- start listening for incoming connections\n\

makefile([mode, [bufsize]]) -- return a file object for the socket [*]\n\

recv(buflen[, flags]) -- receive data\n\

recvfrom(buflen[, flags]) -- receive data and sender's address\n\

sendall(data[, flags]) -- send all data\n\

send(data[, flags]) -- send data, may not send all of it\n\

sendto(data[, flags], addr) -- send data to a given address\n\

setblocking(0 | 1) -- set or clear the blocking I/O flag\n\

setsockopt(level, optname, value) -- set socket options\n\

settimeout(None | float) -- set or clear the timeout\n\

shutdown(how) -- shut down traffic in one or both directions\n\

\n\

 [*] not available on all platforms!");



/* XXX This is a terrible mess of platform-dependent preprocessor hacks.

   I hope some day someone can clean this up please... */



/* Hacks for gethostbyname_r().  On some non-Linux platforms, the configure

   script doesn't get this right, so we hardcode some platform checks below.

   On the other hand, not all Linux versions agree, so there the settings

   computed by the configure script are needed! */



#ifndef linux

# undef HAVE_GETHOSTBYNAME_R_3_ARG

# undef HAVE_GETHOSTBYNAME_R_5_ARG

# undef HAVE_GETHOSTBYNAME_R_6_ARG

#endif



#ifndef WITH_THREAD

# undef HAVE_GETHOSTBYNAME_R

#endif



#ifdef HAVE_GETHOSTBYNAME_R

# if defined(_AIX) || defined(__osf__)

#  define HAVE_GETHOSTBYNAME_R_3_ARG

# elif defined(__sun) || defined(__sgi)

#  define HAVE_GETHOSTBYNAME_R_5_ARG

# elif defined(linux)

/* Rely on the configure script */

# else

#  undef HAVE_GETHOSTBYNAME_R

# endif

#endif



#if !defined(HAVE_GETHOSTBYNAME_R) && defined(WITH_THREAD) && \

    !defined(MS_WINDOWS)

# define USE_GETHOSTBYNAME_LOCK

#endif



/* On systems on which getaddrinfo() is believed to not be thread-safe,

   (this includes the getaddrinfo emulation) protect access with a lock. */

#if defined(WITH_THREAD) && (defined(__APPLE__) || defined(__FreeBSD__) || \

    defined(__OpenBSD__) || defined(__NetBSD__) || !defined(HAVE_GETADDRINFO))

#define USE_GETADDRINFO_LOCK

#endif



#ifdef USE_GETADDRINFO_LOCK

#define ACQUIRE_GETADDRINFO_LOCK PyThread_acquire_lock(netdb_lock, 1);

#define RELEASE_GETADDRINFO_LOCK PyThread_release_lock(netdb_lock);

#else

#define ACQUIRE_GETADDRINFO_LOCK

#define RELEASE_GETADDRINFO_LOCK

#endif



#if defined(USE_GETHOSTBYNAME_LOCK) || defined(USE_GETADDRINFO_LOCK)

# include "pythread.h"

#endif



#if defined(PYCC_VACPP)

# include <types.h>

# include <io.h>

# include <sys/ioctl.h>

# include <utils.h>

# include <ctype.h>

#endif



#if defined(__VMS)

#if ! defined(_SOCKADDR_LEN)

#   ifdef getaddrinfo

#      undef getaddrinfo

#   endif

#  include "TCPIP_IOCTL_ROUTINE"

#else

#  include <ioctl.h>

#endif

#endif



#if defined(PYOS_OS2)

# define  INCL_DOS

# define  INCL_DOSERRORS

# define  INCL_NOPMAPI

# include <os2.h>

#endif



#if defined(__sgi) && _COMPILER_VERSION>700 && !_SGIAPI

/* make sure that the reentrant (gethostbyaddr_r etc)

   functions are declared correctly if compiling with

   MIPSPro 7.x in ANSI C mode (default) */



/* XXX Using _SGIAPI is the wrong thing,

   but I don't know what the right thing is. */

#define _SGIAPI 1



#define HAVE_INET_PTON

#include <netdb.h>

#endif



/* Irix 6.5 fails to define this variable at all. This is needed

   for both GCC and SGI's compiler. I'd say that the SGI headers

   are just busted. */

#if defined(__sgi) && !defined(INET_ADDRSTRLEN)

#define INET_ADDRSTRLEN 16

#endif



/* Generic includes */

#include <sys/types.h>

#include <signal.h>



/* Generic socket object definitions and includes */

#define PySocket_BUILDING_SOCKET

#include "socketmodule.h"



/* Addressing includes */



#ifndef MS_WINDOWS



/* Non-MS WINDOWS includes */

# include <netdb.h>



/* Headers needed for inet_ntoa() and inet_addr() */

# ifdef __BEOS__

#  include <net/netdb.h>

# elif defined(PYOS_OS2) && defined(PYCC_VACPP)

#  include <netdb.h>

typedef size_t socklen_t;

# else

#   include <arpa/inet.h>

# endif



# ifndef RISCOS

#  include <fcntl.h>

# else

#  include <sys/ioctl.h>

#  include <socklib.h>

#  define NO_DUP

int h_errno; /* not used */

#  define INET_ADDRSTRLEN 16

# endif



#else



/* MS_WINDOWS includes */

# include <fcntl.h>



#endif



#ifdef HAVE_STDDEF_H

# include <stddef.h>

#endif



#ifndef offsetof

# define offsetof(type, member)	((size_t)(&((type *)0)->member))

#endif



#ifndef O_NONBLOCK

# define O_NONBLOCK O_NDELAY

#endif



#include "addrinfo.h"



#ifndef HAVE_INET_PTON

int inet_pton(int af, const char *src, void *dst);

const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);

#endif



#ifdef __APPLE__

/* On OS X, getaddrinfo returns no error indication of lookup

   failure, so we must use the emulation instead of the libinfo

   implementation. Unfortunately, performing an autoconf test

   for this bug would require DNS access for the machine performing

   the configuration, which is not acceptable. Therefore, we

   determine the bug just by checking for __APPLE__. If this bug

   gets ever fixed, perhaps checking for sys/version.h would be

   appropriate, which is 10/0 on the system with the bug. */

#ifndef HAVE_GETNAMEINFO

/* This bug seems to be fixed in Jaguar. Ths easiest way I could

   Find to check for Jaguar is that it has getnameinfo(), which

   older releases don't have */

#undef HAVE_GETADDRINFO

#endif

#endif



/* I know this is a bad practice, but it is the easiest... */

#if !defined(HAVE_GETADDRINFO)

/* avoid clashes with the C library definition of the symbol. */

#define getaddrinfo fake_getaddrinfo

#define gai_strerror fake_gai_strerror

#define freeaddrinfo fake_freeaddrinfo

#include "getaddrinfo.c"

#endif

#if !defined(HAVE_GETNAMEINFO)

#define getnameinfo fake_getnameinfo

#include "getnameinfo.c"

#endif



#if defined(MS_WINDOWS) || defined(__BEOS__)

/* BeOS suffers from the same socket dichotomy as Win32... - [cjh] */

/* seem to be a few differences in the API */

#define SOCKETCLOSE closesocket

#define NO_DUP /* Actually it exists on NT 3.5, but what the heck... */

#endif



#ifdef MS_WIN32

#define EAFNOSUPPORT WSAEAFNOSUPPORT

#define snprintf _snprintf

#endif



#if defined(PYOS_OS2) && !defined(PYCC_GCC)

#define SOCKETCLOSE soclose

#define NO_DUP /* Sockets are Not Actual File Handles under OS/2 */

#endif



#ifndef SOCKETCLOSE

#define SOCKETCLOSE close

#endif



#ifdef __VMS

/* TCP/IP Services for VMS uses a maximum send/revc buffer length of 65535 */

#define SEGMENT_SIZE 65535

#endif



/*

 * Constants for getnameinfo()

 */

#if !defined(NI_MAXHOST)

#define NI_MAXHOST 1025

#endif

#if !defined(NI_MAXSERV)

#define NI_MAXSERV 32

#endif



/* XXX There's a problem here: *static* functions are not supposed to have

   a Py prefix (or use CapitalizedWords).  Later... */



/* Global variable holding the exception type for errors detected

   by this module (but not argument type or memory errors, etc.). */

static PyObject *socket_error;

static PyObject *socket_herror;

static PyObject *socket_gaierror;

static PyObject *socket_timeout;



#ifdef RISCOS

/* Global variable which is !=0 if Python is running in a RISC OS taskwindow */

static int taskwindow;

#endif



/* A forward reference to the socket type object.

   The sock_type variable contains pointers to various functions,

   some of which call new_sockobject(), which uses sock_type, so

   there has to be a circular reference. */

static PyTypeObject sock_type;



/* Convenience function to raise an error according to errno

   and return a NULL pointer from a function. */



static PyObject *

set_error(void)

{

#ifdef MS_WINDOWS

	int err_no = WSAGetLastError();

	static struct {

		int no;

		const char *msg;

	} *msgp, msgs[] = {

		{WSAEINTR, "Interrupted system call"},

		{WSAEBADF, "Bad file descriptor"},

		{WSAEACCES, "Permission denied"},

		{WSAEFAULT, "Bad address"},

		{WSAEINVAL, "Invalid argument"},

		{WSAEMFILE, "Too many open files"},

		{WSAEWOULDBLOCK,

		  "The socket operation could not complete "

		  "without blocking"},

		{WSAEINPROGRESS, "Operation now in progress"},

		{WSAEALREADY, "Operation already in progress"},

		{WSAENOTSOCK, "Socket operation on non-socket"},

		{WSAEDESTADDRREQ, "Destination address required"},

		{WSAEMSGSIZE, "Message too long"},

		{WSAEPROTOTYPE, "Protocol wrong type for socket"},

		{WSAENOPROTOOPT, "Protocol not available"},

		{WSAEPROTONOSUPPORT, "Protocol not supported"},

		{WSAESOCKTNOSUPPORT, "Socket type not supported"},

		{WSAEOPNOTSUPP, "Operation not supported"},

		{WSAEPFNOSUPPORT, "Protocol family not supported"},

		{WSAEAFNOSUPPORT, "Address family not supported"},

		{WSAEADDRINUSE, "Address already in use"},

		{WSAEADDRNOTAVAIL, "Can't assign requested address"},

		{WSAENETDOWN, "Network is down"},

		{WSAENETUNREACH, "Network is unreachable"},

		{WSAENETRESET, "Network dropped connection on reset"},

		{WSAECONNABORTED, "Software caused connection abort"},

		{WSAECONNRESET, "Connection reset by peer"},

		{WSAENOBUFS, "No buffer space available"},

		{WSAEISCONN, "Socket is already connected"},

		{WSAENOTCONN, "Socket is not connected"},

		{WSAESHUTDOWN, "Can't send after socket shutdown"},

		{WSAETOOMANYREFS, "Too many references: can't splice"},

		{WSAETIMEDOUT, "Operation timed out"},

		{WSAECONNREFUSED, "Connection refused"},

		{WSAELOOP, "Too many levels of symbolic links"},

		{WSAENAMETOOLONG, "File name too long"},

		{WSAEHOSTDOWN, "Host is down"},

		{WSAEHOSTUNREACH, "No route to host"},

		{WSAENOTEMPTY, "Directory not empty"},

		{WSAEPROCLIM, "Too many processes"},

		{WSAEUSERS, "Too many users"},

		{WSAEDQUOT, "Disc quota exceeded"},

		{WSAESTALE, "Stale NFS file handle"},

		{WSAEREMOTE, "Too many levels of remote in path"},

		{WSASYSNOTREADY, "Network subsystem is unvailable"},

		{WSAVERNOTSUPPORTED, "WinSock version is not supported"},

		{WSANOTINITIALISED,

		  "Successful WSAStartup() not yet performed"},

		{WSAEDISCON, "Graceful shutdown in progress"},

		/* Resolver errors */

		{WSAHOST_NOT_FOUND, "No such host is known"},

		{WSATRY_AGAIN, "Host not found, or server failed"},

		{WSANO_RECOVERY, "Unexpected server error encountered"},

		{WSANO_DATA, "Valid name without requested data"},

		{WSANO_ADDRESS, "No address, look for MX record"},

		{0, NULL}

	};

	if (err_no) {

		PyObject *v;

		const char *msg = "winsock error";



		for (msgp = msgs; msgp->msg; msgp++) {

			if (err_no == msgp->no) {

				msg = msgp->msg;

				break;

			}

		}



		v = Py_BuildValue("(is)", err_no, msg);

		if (v != NULL) {

			PyErr_SetObject(socket_error, v);

			Py_DECREF(v);

		}

		return NULL;

	}

	else

#endif



#if defined(PYOS_OS2) && !defined(PYCC_GCC)

	if (sock_errno() != NO_ERROR) {

		APIRET rc;

		ULONG  msglen;

		char outbuf[100];

		int myerrorcode = sock_errno();



		/* Retrieve socket-related error message from MPTN.MSG file */

		rc = DosGetMessage(NULL, 0, outbuf, sizeof(outbuf),

				   myerrorcode - SOCBASEERR + 26,

				   "mptn.msg",

				   &msglen);

		if (rc == NO_ERROR) {

			PyObject *v;



			/* OS/2 doesn't guarantee a terminator */

			outbuf[msglen] = '\0';

			if (strlen(outbuf) > 0) {

				/* If non-empty msg, trim CRLF */

				char *lastc = &outbuf[ strlen(outbuf)-1 ];

				while (lastc > outbuf && isspace(*lastc)) {

					/* Trim trailing whitespace (CRLF) */

					*lastc-- = '\0';

				}

			}

			v = Py_BuildValue("(is)", myerrorcode, outbuf);

			if (v != NULL) {

				PyErr_SetObject(socket_error, v);

				Py_DECREF(v);

			}

			return NULL;

		}

	}

#endif



#if defined(RISCOS)

	if (_inet_error.errnum != NULL) {

		PyObject *v;

		v = Py_BuildValue("(is)", errno, _inet_err());

		if (v != NULL) {

			PyErr_SetObject(socket_error, v);

			Py_DECREF(v);

		}

		return NULL;

	}

#endif



	return PyErr_SetFromErrno(socket_error);

}





static PyObject *

set_herror(int h_error)

{

	PyObject *v;



#ifdef HAVE_HSTRERROR

	v = Py_BuildValue("(is)", h_error, (char *)hstrerror(h_error));

#else

	v = Py_BuildValue("(is)", h_error, "host not found");

#endif

	if (v != NULL) {

		PyErr_SetObject(socket_herror, v);

		Py_DECREF(v);

	}



	return NULL;

}





static PyObject *

set_gaierror(int error)

{

	PyObject *v;



#ifdef EAI_SYSTEM

	/* EAI_SYSTEM is not available on Windows XP. */

	if (error == EAI_SYSTEM)

		return set_error();

#endif



#ifdef HAVE_GAI_STRERROR

	v = Py_BuildValue("(is)", error, gai_strerror(error));

#else

	v = Py_BuildValue("(is)", error, "getaddrinfo failed");

#endif

	if (v != NULL) {

		PyErr_SetObject(socket_gaierror, v);

		Py_DECREF(v);

	}



	return NULL;

}



/* Function to perform the setting of socket blocking mode

   internally. block = (1 | 0). */

static int

internal_setblocking(PySocketSockObject *s, int block)

{

#ifndef RISCOS

#ifndef MS_WINDOWS

	int delay_flag;

#endif

#endif



	Py_BEGIN_ALLOW_THREADS

#ifdef __BEOS__

	block = !block;

	setsockopt(s->sock_fd, SOL_SOCKET, SO_NONBLOCK,

		   (void *)(&block), sizeof(int));

#else

#ifndef RISCOS

#ifndef MS_WINDOWS

#if defined(PYOS_OS2) && !defined(PYCC_GCC)

	block = !block;

	ioctl(s->sock_fd, FIONBIO, (caddr_t)&block, sizeof(block));

#elif defined(__VMS)

	block = !block;

	ioctl(s->sock_fd, FIONBIO, (char *)&block);

#else  /* !PYOS_OS2 && !_VMS */

	delay_flag = fcntl(s->sock_fd, F_GETFL, 0);

	if (block)

		delay_flag &= (~O_NONBLOCK);

	else

		delay_flag |= O_NONBLOCK;

	fcntl(s->sock_fd, F_SETFL, delay_flag);

#endif /* !PYOS_OS2 */

#else /* MS_WINDOWS */

	block = !block;

	ioctlsocket(s->sock_fd, FIONBIO, (u_long*)&block);

#endif /* MS_WINDOWS */

#else /* RISCOS */

	block = !block;

	socketioctl(s->sock_fd, FIONBIO, (u_long*)&block);

#endif /* RISCOS */

#endif /* __BEOS__ */

	Py_END_ALLOW_THREADS



	/* Since these don't return anything */

	return 1;

}



/* Do a select() on the socket, if necessary (sock_timeout > 0).

   The argument writing indicates the direction.

   This does not raise an exception; we'll let our caller do that

   after they've reacquired the interpreter lock.

   Returns 1 on timeout, 0 otherwise. */

static int

internal_select(PySocketSockObject *s, int writing)

{

	fd_set fds;

	struct timeval tv;

	int n;



	/* Nothing to do unless we're in timeout mode (not non-blocking) */

	if (s->sock_timeout <= 0.0)

		return 0;



	/* Guard against closed socket */

	if (s->sock_fd < 0)

		return 0;



	/* Construct the arguments to select */

	tv.tv_sec = (int)s->sock_timeout;

	tv.tv_usec = (int)((s->sock_timeout - tv.tv_sec) * 1e6);

	FD_ZERO(&fds);

	FD_SET(s->sock_fd, &fds);



	/* See if the socket is ready */

	if (writing)

		n = select(s->sock_fd+1, NULL, &fds, NULL, &tv);

	else

		n = select(s->sock_fd+1, &fds, NULL, NULL, &tv);

	if (n == 0)

		return 1;

	return 0;

}



/* Initialize a new socket object. */



static double defaulttimeout = -1.0; /* Default timeout for new sockets */



PyMODINIT_FUNC

init_sockobject(PySocketSockObject *s,

		SOCKET_T fd, int family, int type, int proto)

{

#ifdef RISCOS

	int block = 1;

#endif

	s->sock_fd = fd;

	s->sock_family = family;

	s->sock_type = type;

	s->sock_proto = proto;

	s->sock_timeout = defaulttimeout;



	s->errorhandler = &set_error;



	if (defaulttimeout >= 0.0)

		internal_setblocking(s, 0);



#ifdef RISCOS

	if (taskwindow)

		socketioctl(s->sock_fd, 0x80046679, (u_long*)&block);

#endif

}





/* Create a new socket object.

   This just creates the object and initializes it.

   If the creation fails, return NULL and set an exception (implicit

   in NEWOBJ()). */



static PySocketSockObject *

new_sockobject(SOCKET_T fd, int family, int type, int proto)

{

	PySocketSockObject *s;

	s = (PySocketSockObject *)

		PyType_GenericNew(&sock_type, NULL, NULL);

	if (s != NULL)

		init_sockobject(s, fd, family, type, proto);

	return s;

}





/* Lock to allow python interpreter to continue, but only allow one

   thread to be in gethostbyname or getaddrinfo */

#if defined(USE_GETHOSTBYNAME_LOCK) || defined(USE_GETADDRINFO_LOCK)

PyThread_type_lock netdb_lock;

#endif





/* Convert a string specifying a host name or one of a few symbolic

   names to a numeric IP address.  This usually calls gethostbyname()

   to do the work; the names "" and "<broadcast>" are special.

   Return the length (IPv4 should be 4 bytes), or negative if

   an error occurred; then an exception is raised. */



static int

setipaddr(char *name, struct sockaddr *addr_ret, size_t addr_ret_size, int af)

{

	struct addrinfo hints, *res;

	int error;

	int d1, d2, d3, d4;

	char ch;



	memset((void *) addr_ret, '\0', sizeof(*addr_ret));

	if (name[0] == '\0') {

		int siz;

		memset(&hints, 0, sizeof(hints));

		hints.ai_family = af;

		hints.ai_socktype = SOCK_DGRAM;	/*dummy*/

		hints.ai_flags = AI_PASSIVE;

		Py_BEGIN_ALLOW_THREADS

		ACQUIRE_GETADDRINFO_LOCK

		error = getaddrinfo(NULL, "0", &hints, &res);

		Py_END_ALLOW_THREADS

		/* We assume that those thread-unsafe getaddrinfo() versions

		   *are* safe regarding their return value, ie. that a

		   subsequent call to getaddrinfo() does not destroy the

		   outcome of the first call. */

		RELEASE_GETADDRINFO_LOCK

		if (error) {

			set_gaierror(error);

			return -1;

		}

		switch (res->ai_family) {

		case AF_INET:

			siz = 4;

			break;

#ifdef ENABLE_IPV6

		case AF_INET6:

			siz = 16;

			break;

#endif

		default:

			freeaddrinfo(res);

			PyErr_SetString(socket_error,

				"unsupported address family");

			return -1;

		}

		if (res->ai_next) {

			freeaddrinfo(res);

			PyErr_SetString(socket_error,

				"wildcard resolved to multiple address");

			return -1;

		}

		if (res->ai_addrlen < addr_ret_size)

			addr_ret_size = res->ai_addrlen;

		memcpy(addr_ret, res->ai_addr, addr_ret_size);

		freeaddrinfo(res);

		return siz;

	}

	if (name[0] == '<' && strcmp(name, "<broadcast>") == 0) {

		struct sockaddr_in *sin;

		if (af != AF_INET && af != AF_UNSPEC) {

			PyErr_SetString(socket_error,

				"address family mismatched");

			return -1;

		}

		sin = (struct sockaddr_in *)addr_ret;

		memset((void *) sin, '\0', sizeof(*sin));

		sin->sin_family = AF_INET;

#ifdef HAVE_SOCKADDR_SA_LEN

		sin->sin_len = sizeof(*sin);

#endif

		sin->sin_addr.s_addr = INADDR_BROADCAST;

		return sizeof(sin->sin_addr);

	}

	if (sscanf(name, "%d.%d.%d.%d%c", &d1, &d2, &d3, &d4, &ch) == 4 &&

	    0 <= d1 && d1 <= 255 && 0 <= d2 && d2 <= 255 &&

	    0 <= d3 && d3 <= 255 && 0 <= d4 && d4 <= 255) {

		struct sockaddr_in *sin;

		sin = (struct sockaddr_in *)addr_ret;

		sin->sin_addr.s_addr = htonl(

			((long) d1 << 24) | ((long) d2 << 16) |

			((long) d3 << 8) | ((long) d4 << 0));

		sin->sin_family = AF_INET;

#ifdef HAVE_SOCKADDR_SA_LEN

		sin->sin_len = sizeof(*sin);

#endif

		return 4;

	}

	memset(&hints, 0, sizeof(hints));

	hints.ai_family = af;

	Py_BEGIN_ALLOW_THREADS

	ACQUIRE_GETADDRINFO_LOCK

	error = getaddrinfo(name, NULL, &hints, &res);

#if defined(__digital__) && defined(__unix__)

	if (error == EAI_NONAME && af == AF_UNSPEC) {

		/* On Tru64 V5.1, numeric-to-addr conversion fails

		   if no address family is given. Assume IPv4 for now.*/

		hints.ai_family = AF_INET;

		error = getaddrinfo(name, NULL, &hints, &res);

	}

#endif

	Py_END_ALLOW_THREADS

	RELEASE_GETADDRINFO_LOCK  /* see comment in setipaddr() */

	if (error) {

		set_gaierror(error);

		return -1;

	}

	if (res->ai_addrlen < addr_ret_size)

		addr_ret_size = res->ai_addrlen;

	memcpy((char *) addr_ret, res->ai_addr, addr_ret_size);

	freeaddrinfo(res);

	switch (addr_ret->sa_family) {

	case AF_INET:

		return 4;

#ifdef ENABLE_IPV6

	case AF_INET6:

		return 16;

#endif

	default:

		PyErr_SetString(socket_error, "unknown address family");

		return -1;

	}

}





/* Create a string object representing an IP address.

   This is always a string of the form 'dd.dd.dd.dd' (with variable

   size numbers). */



static PyObject *

makeipaddr(struct sockaddr *addr, int addrlen)

{

	char buf[NI_MAXHOST];

	int error;



	error = getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0,

		NI_NUMERICHOST);

	if (error) {

		set_gaierror(error);

		return NULL;

	}

	return PyString_FromString(buf);

}





/* Create an object representing the given socket address,

   suitable for passing it back to bind(), connect() etc.

   The family field of the sockaddr structure is inspected

   to determine what kind of address it really is. */



/*ARGSUSED*/

static PyObject *

makesockaddr(int sockfd, struct sockaddr *addr, int addrlen)

{

	if (addrlen == 0) {

		/* No address -- may be recvfrom() from known socket */

		Py_INCREF(Py_None);

		return Py_None;

	}



#ifdef __BEOS__

	/* XXX: BeOS version of accept() doesn't set family correctly */

	addr->sa_family = AF_INET;

#endif



	switch (addr->sa_family) {



	case AF_INET:

	{

		struct sockaddr_in *a;

		PyObject *addrobj = makeipaddr(addr, sizeof(*a));

		PyObject *ret = NULL;

		if (addrobj) {

			a = (struct sockaddr_in *)addr;

			ret = Py_BuildValue("Oi", addrobj, ntohs(a->sin_port));

			Py_DECREF(addrobj);

		}

		return ret;

	}



#if defined(AF_UNIX) && !defined(PYOS_OS2)

	case AF_UNIX:

	{

		struct sockaddr_un *a = (struct sockaddr_un *) addr;

		return PyString_FromString(a->sun_path);

	}

#endif /* AF_UNIX */



#ifdef ENABLE_IPV6

	case AF_INET6:

	{

		struct sockaddr_in6 *a;

		PyObject *addrobj = makeipaddr(addr, sizeof(*a));

		PyObject *ret = NULL;

		if (addrobj) {

			a = (struct sockaddr_in6 *)addr;

			ret = Py_BuildValue("Oiii",

					    addrobj,

					    ntohs(a->sin6_port),

					    a->sin6_flowinfo,

					    a->sin6_scope_id);

			Py_DECREF(addrobj);

		}

		return ret;

	}

#endif



#ifdef HAVE_NETPACKET_PACKET_H

	case AF_PACKET:

	{

		struct sockaddr_ll *a = (struct sockaddr_ll *)addr;

		char *ifname = "";

		struct ifreq ifr;

		/* need to look up interface name give index */

		if (a->sll_ifindex) {

			ifr.ifr_ifindex = a->sll_ifindex;

			if (ioctl(sockfd, SIOCGIFNAME, &ifr) == 0)

				ifname = ifr.ifr_name;

		}

		return Py_BuildValue("shbhs#",

				     ifname,

				     ntohs(a->sll_protocol),

				     a->sll_pkttype,

				     a->sll_hatype,

				     a->sll_addr,

				     a->sll_halen);

	}

#endif



	/* More cases here... */



	default:

		/* If we don't know the address family, don't raise an

		   exception -- return it as a tuple. */

		return Py_BuildValue("is#",

				     addr->sa_family,

				     addr->sa_data,

				     sizeof(addr->sa_data));



	}

}





/* Parse a socket address argument according to the socket object's

   address family.  Return 1 if the address was in the proper format,

   0 of not.  The address is returned through addr_ret, its length

   through len_ret. */



static int

getsockaddrarg(PySocketSockObject *s, PyObject *args,

	       struct sockaddr **addr_ret, int *len_ret)

{

	switch (s->sock_family) {



#if defined(AF_UNIX) && !defined(PYOS_OS2)

	case AF_UNIX:

	{

		struct sockaddr_un* addr;

		char *path;

		int len;

		addr = (struct sockaddr_un*)&(s->sock_addr).un;

		if (!PyArg_Parse(args, "t#", &path, &len))

			return 0;

		if (len > sizeof addr->sun_path) {

			PyErr_SetString(socket_error,

					"AF_UNIX path too long");

			return 0;

		}

		addr->sun_family = s->sock_family;

		memcpy(addr->sun_path, path, len);

		addr->sun_path[len] = 0;

		*addr_ret = (struct sockaddr *) addr;

		*len_ret = len + sizeof(*addr) - sizeof(addr->sun_path);

		return 1;

	}

#endif /* AF_UNIX */



	case AF_INET:

	{

		struct sockaddr_in* addr;

		char *host;

		int port, result;

 		addr=(struct sockaddr_in*)&(s->sock_addr).in;

		if (!PyTuple_Check(args)) {

			PyErr_Format(

				PyExc_TypeError,

				"getsockaddrarg: "

				"AF_INET address must be tuple, not %.500s",

				args->ob_type->tp_name);

			return 0;

		}

		if (!PyArg_ParseTuple(args, "eti:getsockaddrarg",

				      "idna", &host, &port))

			return 0;

                result = setipaddr(host, (struct sockaddr *)addr,

                                   sizeof(*addr),  AF_INET);

                PyMem_Free(host);

                if (result < 0)

			return 0;

		addr->sin_family = AF_INET;

		addr->sin_port = htons((short)port);

		*addr_ret = (struct sockaddr *) addr;

		*len_ret = sizeof *addr;

		return 1;

	}



#ifdef ENABLE_IPV6

	case AF_INET6:

	{

		struct sockaddr_in6* addr;

		char *host;

		int port, flowinfo, scope_id, result;

 		addr = (struct sockaddr_in6*)&(s->sock_addr).in6;

		flowinfo = scope_id = 0;

		if (!PyArg_ParseTuple(args, "eti|ii",

				      "idna", &host, &port, &flowinfo,

				      &scope_id)) {

			return 0;

		}

                result = setipaddr(host, (struct sockaddr *)addr,

                                   sizeof(*addr), AF_INET6);

                PyMem_Free(host);

                if (result < 0)

			return 0;

		addr->sin6_family = s->sock_family;

		addr->sin6_port = htons((short)port);

		addr->sin6_flowinfo = flowinfo;

		addr->sin6_scope_id = scope_id;

		*addr_ret = (struct sockaddr *) addr;

		*len_ret = sizeof *addr;

		return 1;

	}

#endif



#ifdef HAVE_NETPACKET_PACKET_H

	case AF_PACKET:

	{

		struct sockaddr_ll* addr;

		struct ifreq ifr;

		char *interfaceName;

		int protoNumber;

		int hatype = 0;

		int pkttype = 0;

		char *haddr;



		if (!PyArg_ParseTuple(args, "si|iis", &interfaceName,

				      &protoNumber, &pkttype, &hatype, &haddr))

			return 0;

		strncpy(ifr.ifr_name, interfaceName, sizeof(ifr.ifr_name));

		ifr.ifr_name[(sizeof(ifr.ifr_name))-1] = '\0';

		if (ioctl(s->sock_fd, SIOCGIFINDEX, &ifr) < 0) {

		        s->errorhandler();

			return 0;

		}

		addr = &(s->sock_addr.ll);

		addr->sll_family = AF_PACKET;

		addr->sll_protocol = htons((short)protoNumber);

		addr->sll_ifindex = ifr.ifr_ifindex;

		addr->sll_pkttype = pkttype;

		addr->sll_hatype = hatype;

		*addr_ret = (struct sockaddr *) addr;

		*len_ret = sizeof *addr;

		return 1;

	}

#endif



	/* More cases here... */



	default:

		PyErr_SetString(socket_error, "getsockaddrarg: bad family");

		return 0;



	}

}





/* Get the address length according to the socket object's address family.

   Return 1 if the family is known, 0 otherwise.  The length is returned

   through len_ret. */



static int

getsockaddrlen(PySocketSockObject *s, socklen_t *len_ret)

{

	switch (s->sock_family) {



#if defined(AF_UNIX) && !defined(PYOS_OS2)

	case AF_UNIX:

	{

		*len_ret = sizeof (struct sockaddr_un);

		return 1;

	}

#endif /* AF_UNIX */



	case AF_INET:

	{

		*len_ret = sizeof (struct sockaddr_in);

		return 1;

	}



#ifdef ENABLE_IPV6

	case AF_INET6:

	{

		*len_ret = sizeof (struct sockaddr_in6);

		return 1;

	}

#endif



#ifdef HAVE_NETPACKET_PACKET_H

	case AF_PACKET:

	{

		*len_ret = sizeof (struct sockaddr_ll);

		return 1;

	}

#endif



	/* More cases here... */



	default:

		PyErr_SetString(socket_error, "getsockaddrlen: bad family");

		return 0;



	}

}





/* s.accept() method */



static PyObject *

sock_accept(PySocketSockObject *s)

{

	char addrbuf[256];

	SOCKET_T newfd;

	socklen_t addrlen;

	PyObject *sock = NULL;

	PyObject *addr = NULL;

	PyObject *res = NULL;

	int timeout;



	if (!getsockaddrlen(s, &addrlen))

		return NULL;

	memset(addrbuf, 0, addrlen);



#ifdef MS_WINDOWS

	newfd = INVALID_SOCKET;

#else

	newfd = -1;

#endif



	Py_BEGIN_ALLOW_THREADS

	timeout = internal_select(s, 0);

	if (!timeout)

		newfd = accept(s->sock_fd, (struct sockaddr *) addrbuf,

			       &addrlen);

	Py_END_ALLOW_THREADS



	if (timeout) {

		PyErr_SetString(socket_timeout, "timed out");

		return NULL;

	}



#ifdef MS_WINDOWS

	if (newfd == INVALID_SOCKET)

#else

	if (newfd < 0)

#endif

		return s->errorhandler();



	/* Create the new object with unspecified family,

	   to avoid calls to bind() etc. on it. */

	sock = (PyObject *) new_sockobject(newfd,

					   s->sock_family,

					   s->sock_type,

					   s->sock_proto);



	if (sock == NULL) {

		SOCKETCLOSE(newfd);

		goto finally;

	}

	addr = makesockaddr(s->sock_fd, (struct sockaddr *)addrbuf,

			    addrlen);

	if (addr == NULL)

		goto finally;



	res = Py_BuildValue("OO", sock, addr);



finally:

	Py_XDECREF(sock);

	Py_XDECREF(addr);

	return res;

}



PyDoc_STRVAR(accept_doc,

"accept() -> (socket object, address info)\n\

\n\

Wait for an incoming connection.  Return a new socket representing the\n\

connection, and the address of the client.  For IP sockets, the address\n\

info is a pair (hostaddr, port).");



/* s.setblocking(flag) method.  Argument:

   False -- non-blocking mode; same as settimeout(0)

   True -- blocking mode; same as settimeout(None)

*/



static PyObject *

sock_setblocking(PySocketSockObject *s, PyObject *arg)

{

	int block;



	block = PyInt_AsLong(arg);

	if (block == -1 && PyErr_Occurred())

		return NULL;



	s->sock_timeout = block ? -1.0 : 0.0;

	internal_setblocking(s, block);



	Py_INCREF(Py_None);

	return Py_None;

}



PyDoc_STRVAR(setblocking_doc,

"setblocking(flag)\n\

\n\

Set the socket to blocking (flag is true) or non-blocking (false).\n\

setblocking(True) is equivalent to settimeout(None);\n\

setblocking(False) is equivalent to settimeout(0.0).");



/* s.settimeout(timeout) method.  Argument:

   None -- no timeout, blocking mode; same as setblocking(True)

   0.0  -- non-blocking mode; same as setblocking(False)

   > 0  -- timeout mode; operations time out after timeout seconds

   < 0  -- illegal; raises an exception

*/

static PyObject *

sock_settimeout(PySocketSockObject *s, PyObject *arg)

{

	double timeout;



	if (arg == Py_None)

		timeout = -1.0;

	else {

		timeout = PyFloat_AsDouble(arg);

		if (timeout < 0.0) {

			if (!PyErr_Occurred())

				PyErr_SetString(PyExc_ValueError,

						"Timeout value out of range");

			return NULL;

		}

	}



	s->sock_timeout = timeout;

	internal_setblocking(s, timeout < 0.0);



	Py_INCREF(Py_None);

	return Py_None;

}



PyDoc_STRVAR(settimeout_doc,

"settimeout(timeout)\n\

\n\

Set a timeout on socket operations.  'timeout' can be a float,\n\

giving in seconds, or None.  Setting a timeout of None disables\n\

the timeout feature and is equivalent to setblocking(1).\n\

Setting a timeout of zero is the same as setblocking(0).");



/* s.gettimeout() method.

   Returns the timeout associated with a socket. */

static PyObject *

sock_gettimeout(PySocketSockObject *s)

{

	if (s->sock_timeout < 0.0) {

		Py_INCREF(Py_None);

		return Py_None;

	}

	else

		return PyFloat_FromDouble(s->sock_timeout);

}



PyDoc_STRVAR(gettimeout_doc,

"gettimeout() -> timeout\n\

\n\

Returns the timeout in floating seconds associated with socket \n\

operations. A timeout of None indicates that timeouts on socket \n\

operations are disabled.");



#ifdef RISCOS

/* s.sleeptaskw(1 | 0) method */



static PyObject *

sock_sleeptaskw(PySocketSockObject *s,PyObject *arg)

{

	int block;

	block = PyInt_AsLong(arg);

	if (block == -1 && PyErr_Occurred())

		return NULL;

	Py_BEGIN_ALLOW_THREADS

	socketioctl(s->sock_fd, 0x80046679, (u_long*)&block);

	Py_END_ALLOW_THREADS



	Py_INCREF(Py_None);

	return Py_None;

}

PyDoc_STRVAR(sleeptaskw_doc,

"sleeptaskw(flag)\n\

\n\

Allow sleeps in taskwindows.");

#endif





/* s.setsockopt() method.

   With an integer third argument, sets an integer option.

   With a string third argument, sets an option from a buffer;

   use optional built-in module 'struct' to encode the string. */



static PyObject *

sock_setsockopt(PySocketSockObject *s, PyObject *args)

{

	int level;

	int optname;

	int res;

	char *buf;

	int buflen;

	int flag;



	if (PyArg_ParseTuple(args, "iii:setsockopt",

			     &level, &optname, &flag)) {

		buf = (char *) &flag;

		buflen = sizeof flag;

	}

	else {

		PyErr_Clear();

		if (!PyArg_ParseTuple(args, "iis#:setsockopt",

				      &level, &optname, &buf, &buflen))

			return NULL;

	}

	res = setsockopt(s->sock_fd, level, optname, (void *)buf, buflen);

	if (res < 0)

		return s->errorhandler();

	Py_INCREF(Py_None);

	return Py_None;

}



PyDoc_STRVAR(setsockopt_doc,

"setsockopt(level, option, value)\n\

\n\

Set a socket option.  See the Unix manual for level and option.\n\

The value argument can either be an integer or a string.");





/* s.getsockopt() method.

   With two arguments, retrieves an integer option.

   With a third integer argument, retrieves a string buffer of that size;

   use optional built-in module 'struct' to decode the string. */



static PyObject *

sock_getsockopt(PySocketSockObject *s, PyObject *args)

{

	int level;

	int optname;

	int res;

	PyObject *buf;

	socklen_t buflen = 0;



#ifdef __BEOS__

	/* We have incomplete socket support. */

	PyErr_SetString(socket_error, "getsockopt not supported");

	return NULL;

#else



	if (!PyArg_ParseTuple(args, "ii|i:getsockopt",

			      &level, &optname, &buflen))

		return NULL;



	if (buflen == 0) {

		int flag = 0;

		socklen_t flagsize = sizeof flag;

		res = getsockopt(s->sock_fd, level, optname,

				 (void *)&flag, &flagsize);

		if (res < 0)

			return s->errorhandler();

		return PyInt_FromLong(flag);

	}

#ifdef __VMS

	if (buflen > 1024) {

#else

	if (buflen <= 0 || buflen > 1024) {

#endif

		PyErr_SetString(socket_error,

				"getsockopt buflen out of range");

		return NULL;

	}

	buf = PyString_FromStringAndSize((char *)NULL, buflen);

	if (buf == NULL)

		return NULL;

	res = getsockopt(s->sock_fd, level, optname,

			 (void *)PyString_AS_STRING(buf), &buflen);

	if (res < 0) {

		Py_DECREF(buf);

		return s->errorhandler();

	}

	_PyString_Resize(&buf, buflen);

	return buf;

#endif /* __BEOS__ */

}



PyDoc_STRVAR(getsockopt_doc,

"getsockopt(level, option[, buffersize]) -> value\n\

\n\

Get a socket option.  See the Unix manual for level and option.\n\

If a nonzero buffersize argument is given, the return value is a\n\

string of that length; otherwise it is an integer.");





/* s.bind(sockaddr) method */



static PyObject *

sock_bind(PySocketSockObject *s, PyObject *addro)

{

	struct sockaddr *addr;

	int addrlen;

	int res;



	if (!getsockaddrarg(s, addro, &addr, &addrlen))

		return NULL;

	Py_BEGIN_ALLOW_THREADS

	res = bind(s->sock_fd, addr, addrlen);

	Py_END_ALLOW_THREADS

	if (res < 0)

		return s->errorhandler();

	Py_INCREF(Py_None);

	return Py_None;

}



PyDoc_STRVAR(bind_doc,

"bind(address)\n\

\n\

Bind the socket to a local address.  For IP sockets, the address is a\n\

pair (host, port); the host must refer to the local host. For raw packet\n\

sockets the address is a tuple (ifname, proto [,pkttype [,hatype]])");





/* s.close() method.

   Set the file descriptor to -1 so operations tried subsequently

   will surely fail. */



static PyObject *

sock_close(PySocketSockObject *s)

{

	SOCKET_T fd;



	if ((fd = s->sock_fd) != -1) {

		s->sock_fd = -1;

		Py_BEGIN_ALLOW_THREADS

		(void) SOCKETCLOSE(fd);

		Py_END_ALLOW_THREADS

	}

	Py_INCREF(Py_None);

	return Py_None;

}



PyDoc_STRVAR(close_doc,

"close()\n\

\n\

Close the socket.  It cannot be used after this call.");



static int

internal_connect(PySocketSockObject *s, struct sockaddr *addr, int addrlen,

		 int *timeoutp)

{

	int res, timeout;



	timeout = 0;

	res = connect(s->sock_fd, addr, addrlen);



#ifdef MS_WINDOWS



	if (s->sock_timeout > 0.0) {

		if (res < 0 && WSAGetLastError() == WSAEWOULDBLOCK) {

			/* This is a mess.  Best solution: trust select */

			fd_set fds;

			struct timeval tv;

			tv.tv_sec = (int)s->sock_timeout;

			tv.tv_usec = (int)((s->sock_timeout - tv.tv_sec) * 1e6);

			FD_ZERO(&fds);

			FD_SET(s->sock_fd, &fds);

			res = select(s->sock_fd+1, NULL, &fds, NULL, &tv);

			if (res == 0) {

				res = WSAEWOULDBLOCK;

				timeout = 1;

			} else if (res > 0)

				res = 0;

			/* else if (res < 0) an error occurred */

		}

	}



	if (res < 0)

		res = WSAGetLastError();



#else



	if (s->sock_timeout > 0.0) {

		if (res < 0 && errno == EINPROGRESS) {

			timeout = internal_select(s, 1);

			res = connect(s->sock_fd, addr, addrlen);

			if (res < 0 && errno == EISCONN)

				res = 0;

		}

	}



	if (res < 0)

		res = errno;



#endif

	*timeoutp = timeout;



	return res;

}



/* s.connect(sockaddr) method */



static PyObject *

sock_connect(PySocketSockObject *s, PyObject *addro)

{

	struct sockaddr *addr;

	int addrlen;

	int res;

	int timeout;



	if (!getsockaddrarg(s, addro, &addr, &addrlen))

		return NULL;



	Py_BEGIN_ALLOW_THREADS

	res = internal_connect(s, addr, addrlen, &timeout);

	Py_END_ALLOW_THREADS



	if (timeout) {

		PyErr_SetString(socket_timeout, "timed out");

		return NULL;

	}

	if (res != 0)

		return s->errorhandler();

	Py_INCREF(Py_None);

	return Py_None;

}



PyDoc_STRVAR(connect_doc,

"connect(address)\n\

\n\

Connect the socket to a remote address.  For IP sockets, the address\n\

is a pair (host, port).");





/* s.connect_ex(sockaddr) method */



static PyObject *

sock_connect_ex(PySocketSockObject *s, PyObject *addro)

{

	struct sockaddr *addr;

	int addrlen;

	int res;

	int timeout;



	if (!getsockaddrarg(s, addro, &addr, &addrlen))

		return NULL;



	Py_BEGIN_ALLOW_THREADS

	res = internal_connect(s, addr, addrlen, &timeout);

	Py_END_ALLOW_THREADS



	return PyInt_FromLong((long) res);

}



PyDoc_STRVAR(connect_ex_doc,

"connect_ex(address) -> errno\n\

\n\

This is like connect(address), but returns an error code (the errno value)\n\

instead of raising an exception when an error occurs.");





/* s.fileno() method */



static PyObject *

sock_fileno(PySocketSockObject *s)

{

#if SIZEOF_SOCKET_T <= SIZEOF_LONG

	return PyInt_FromLong((long) s->sock_fd);

#else

	return PyLong_FromLongLong((PY_LONG_LONG)s->sock_fd);

#endif

}



PyDoc_STRVAR(fileno_doc,

"fileno() -> integer\n\

\n\

Return the integer file descriptor of the socket.");





#ifndef NO_DUP

/* s.dup() method */



static PyObject *

sock_dup(PySocketSockObject *s)

{

	SOCKET_T newfd;

	PyObject *sock;



	newfd = dup(s->sock_fd);

	if (newfd < 0)

		return s->errorhandler();

	sock = (PyObject *) new_sockobject(newfd,

					   s->sock_family,

					   s->sock_type,

					   s->sock_proto);

	if (sock == NULL)

		SOCKETCLOSE(newfd);

	return sock;

}



PyDoc_STRVAR(dup_doc,

"dup() -> socket object\n\

\n\

Return a new socket object connected to the same system resource.");



#endif





/* s.getsockname() method */



static PyObject *

sock_getsockname(PySocketSockObject *s)

{

	char addrbuf[256];

	int res;

	socklen_t addrlen;



	if (!getsockaddrlen(s, &addrlen))

		return NULL;

	memset(addrbuf, 0, addrlen);

	Py_BEGIN_ALLOW_THREADS

	res = getsockname(s->sock_fd, (struct sockaddr *) addrbuf, &addrlen);

	Py_END_ALLOW_THREADS

	if (res < 0)

		return s->errorhandler();

	return makesockaddr(s->sock_fd, (struct sockaddr *) addrbuf, addrlen);

}



PyDoc_STRVAR(getsockname_doc,

"getsockname() -> address info\n\

\n\

Return the address of the local endpoint.  For IP sockets, the address\n\

info is a pair (hostaddr, port).");





#ifdef HAVE_GETPEERNAME		/* Cray APP doesn't have this :-( */

/* s.getpeername() method */



static PyObject *

sock_getpeername(PySocketSockObject *s)

{

	char addrbuf[256];

	int res;

	socklen_t addrlen;



	if (!getsockaddrlen(s, &addrlen))

		return NULL;

	memset(addrbuf, 0, addrlen);

	Py_BEGIN_ALLOW_THREADS

	res = getpeername(s->sock_fd, (struct sockaddr *) addrbuf, &addrlen);

	Py_END_ALLOW_THREADS

	if (res < 0)

		return s->errorhandler();

	return makesockaddr(s->sock_fd, (struct sockaddr *) addrbuf, addrlen);

}



PyDoc_STRVAR(getpeername_doc,

"getpeername() -> address info\n\

\n\

Return the address of the remote endpoint.  For IP sockets, the address\n\

info is a pair (hostaddr, port).");



#endif /* HAVE_GETPEERNAME */





/* s.listen(n) method */



static PyObject *

sock_listen(PySocketSockObject *s, PyObject *arg)

{

	int backlog;

	int res;



	backlog = PyInt_AsLong(arg);

	if (backlog == -1 && PyErr_Occurred())

		return NULL;

	Py_BEGIN_ALLOW_THREADS

	if (backlog < 1)

		backlog = 1;

	res = listen(s->sock_fd, backlog);

	Py_END_ALLOW_THREADS

	if (res < 0)

		return s->errorhandler();

	Py_INCREF(Py_None);

	return Py_None;

}



PyDoc_STRVAR(listen_doc,

"listen(backlog)\n\

\n\

Enable a server to accept connections.  The backlog argument must be at\n\

least 1; it specifies the number of unaccepted connection that the system\n\

will allow before refusing new connections.");





#ifndef NO_DUP

/* s.makefile(mode) method.

   Create a new open file object referring to a dupped version of

   the socket's file descriptor.  (The dup() call is necessary so

   that the open file and socket objects may be closed independent

   of each other.)

   The mode argument specifies 'r' or 'w' passed to fdopen(). */



static PyObject *

sock_makefile(PySocketSockObject *s, PyObject *args)

{

	extern int fclose(FILE *);

	char *mode = "r";

	int bufsize = -1;

#ifdef MS_WIN32

	Py_intptr_t fd;

#else

	int fd;

#endif

	FILE *fp;

	PyObject *f;

#ifdef __VMS

	char *mode_r = "r";

	char *mode_w = "w";

#endif



	if (!PyArg_ParseTuple(args, "|si:makefile", &mode, &bufsize))

		return NULL;

#ifdef __VMS

	if (strcmp(mode,"rb") == 0) {

	    mode = mode_r;

	}

	else {

		if (strcmp(mode,"wb") == 0) {

			mode = mode_w;

		}

	}

#endif

#ifdef MS_WIN32

	if (((fd = _open_osfhandle(s->sock_fd, _O_BINARY)) < 0) ||

	    ((fd = dup(fd)) < 0) || ((fp = fdopen(fd, mode)) == NULL))

#else

	if ((fd = dup(s->sock_fd)) < 0 || (fp = fdopen(fd, mode)) == NULL)

#endif

	{

		if (fd >= 0)

			SOCKETCLOSE(fd);

		return s->errorhandler();

	}

#ifdef USE_GUSI2

	/* Workaround for bug in Metrowerks MSL vs. GUSI I/O library */

	if (strchr(mode, 'b') != NULL)

		bufsize = 0;

#endif

	f = PyFile_FromFile(fp, "<socket>", mode, fclose);

	if (f != NULL)

		PyFile_SetBufSize(f, bufsize);

	return f;

}



PyDoc_STRVAR(makefile_doc,

"makefile([mode[, buffersize]]) -> file object\n\

\n\

Return a regular file object corresponding to the socket.\n\

The mode and buffersize arguments are as for the built-in open() function.");



#endif /* NO_DUP */





/* s.recv(nbytes [,flags]) method */



static PyObject *

sock_recv(PySocketSockObject *s, PyObject *args)

{

	int len, n = 0, flags = 0, timeout;

	PyObject *buf;

#ifdef __VMS

	int read_length;

	char *read_buf;

#endif



	if (!PyArg_ParseTuple(args, "i|i:recv", &len, &flags))

		return NULL;



	if (len < 0) {

		PyErr_SetString(PyExc_ValueError,

				"negative buffersize in recv");

		return NULL;

	}



	buf = PyString_FromStringAndSize((char *) 0, len);

	if (buf == NULL)

		return NULL;



#ifndef __VMS

	Py_BEGIN_ALLOW_THREADS

	timeout = internal_select(s, 0);

	if (!timeout)

		n = recv(s->sock_fd, PyString_AS_STRING(buf), len, flags);

	Py_END_ALLOW_THREADS



	if (timeout) {

		Py_DECREF(buf);

		PyErr_SetString(socket_timeout, "timed out");

		return NULL;

	}

	if (n < 0) {

		Py_DECREF(buf);

		return s->errorhandler();

	}

	if (n != len)

		_PyString_Resize(&buf, n);

#else

	read_buf = PyString_AsString(buf);

	read_length = len;

	while (read_length != 0) {

		unsigned int segment;



		segment = read_length /SEGMENT_SIZE;

		if (segment != 0) {

			segment = SEGMENT_SIZE;

		}

		else {

			segment = read_length;

		}



		Py_BEGIN_ALLOW_THREADS

		timeout = internal_select(s, 0);

		if (!timeout)

			n = recv(s->sock_fd, read_buf, segment, flags);

		Py_END_ALLOW_THREADS



		if (timeout) {

			Py_DECREF(buf);

			PyErr_SetString(socket_timeout, "timed out");

			return NULL;

		}

		if (n < 0) {

			Py_DECREF(buf);

			return s->errorhandler();

		}

		if (n != read_length) {

			read_buf += n;

			break;

		}



		read_length -= segment;

		read_buf += segment;

	}

	if (_PyString_Resize(&buf, (read_buf - PyString_AsString(buf))) < 0)

	{

	    return NULL;

	}

#endif /* !__VMS */

	return buf;

}



PyDoc_STRVAR(recv_doc,

"recv(buffersize[, flags]) -> data\n\

\n\

Receive up to buffersize bytes from the socket.  For the optional flags\n\

argument, see the Unix manual.  When no data is available, block until\n\

at least one byte is available or until the remote end is closed.  When\n\

the remote end is closed and all data is read, return the empty string.");





/* s.recvfrom(nbytes [,flags]) method */



static PyObject *

sock_recvfrom(PySocketSockObject *s, PyObject *args)

{

	char addrbuf[256];

	PyObject *buf = NULL;

	PyObject *addr = NULL;

	PyObject *ret = NULL;

	int len, n = 0, flags = 0, timeout;

	socklen_t addrlen;



	if (!PyArg_ParseTuple(args, "i|i:recvfrom", &len, &flags))

		return NULL;



	if (!getsockaddrlen(s, &addrlen))

		return NULL;

	buf = PyString_FromStringAndSize((char *) 0, len);

	if (buf == NULL)

		return NULL;



	Py_BEGIN_ALLOW_THREADS

	memset(addrbuf, 0, addrlen);

	timeout = internal_select(s, 0);

	if (!timeout)

		n = recvfrom(s->sock_fd, PyString_AS_STRING(buf), len, flags,

#ifndef MS_WINDOWS

#if defined(PYOS_OS2) && !defined(PYCC_GCC)

			     (struct sockaddr *)addrbuf, &addrlen

#else

			     (void *)addrbuf, &addrlen

#endif

#else

			     (struct sockaddr *)addrbuf, &addrlen

#endif

			);

	Py_END_ALLOW_THREADS



	if (timeout) {

		Py_DECREF(buf);

		PyErr_SetString(socket_timeout, "timed out");

		return NULL;

	}

	if (n < 0) {

		Py_DECREF(buf);

		return s->errorhandler();

	}



	if (n != len && _PyString_Resize(&buf, n) < 0)

		return NULL;



	if (!(addr = makesockaddr(s->sock_fd, (struct sockaddr *)addrbuf,

				  addrlen)))

		goto finally;



	ret = Py_BuildValue("OO", buf, addr);



f…