-/* Copyright (C) 1996,1997,1998 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice. */
-
-/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
- gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
-
-\f
-
-#include <stdio.h>
-
-#include "_scm.h"
-#include "unif.h"
-#include "feature.h"
-#include "fports.h"
-#include "vectors.h"
-
-#include "validate.h"
-#include "socket.h"
-
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <sys/types.h>
-#include <sys/socket.h>
-#ifdef HAVE_UNIX_DOMAIN_SOCKETS
-#include <sys/un.h>
-#endif
-#include <netinet/in.h>
-#include <netdb.h>
-#include <arpa/inet.h>
-
-\f
-
-SCM_DEFINE (scm_htons, "htons", 1, 0, 0,
- (SCM in),
- "Returns a new integer from @var{value} by converting from host to\n"
- "network order. @var{value} must be within the range of a C unsigned\n"
- "short integer.")
-#define FUNC_NAME s_scm_htons
-{
- unsigned short c_in;
-
- SCM_VALIDATE_INUM_COPY (1,in,c_in);
- if (c_in != SCM_INUM (in))
- SCM_OUT_OF_RANGE (1,in);
-
- return SCM_MAKINUM (htons (c_in));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_ntohs, "ntohs", 1, 0, 0,
- (SCM in),
- "Returns a new integer from @var{value} by converting from network to\n"
- "host order. @var{value} must be within the range of a C unsigned short\n"
- "integer.")
-#define FUNC_NAME s_scm_ntohs
-{
- unsigned short c_in;
-
- SCM_VALIDATE_INUM_COPY (1,in,c_in);
- if (c_in != SCM_INUM (in))
- SCM_OUT_OF_RANGE (1,in);
-
- return SCM_MAKINUM (ntohs (c_in));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0,
- (SCM in),
- "Returns a new integer from @var{value} by converting from host to\n"
- "network order. @var{value} must be within the range of a C unsigned\n"
- "long integer.")
-#define FUNC_NAME s_scm_htonl
-{
- unsigned long c_in = SCM_NUM2ULONG (1,in);
- return scm_ulong2num (htonl (c_in));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_ntohl, "ntohl", 1, 0, 0,
- (SCM in),
- "Returns a new integer from @var{value} by converting from network to\n"
- "host order. @var{value} must be within the range of a C unsigned\n"
- "long integer.")
-#define FUNC_NAME s_scm_ntohl
-{
- unsigned long c_in = SCM_NUM2ULONG (1,in);
- return scm_ulong2num (ntohl (c_in));
-}
-#undef FUNC_NAME
-
-SCM_SYMBOL (sym_socket, "socket");
-
-static SCM
-scm_sock_fd_to_port (int fd, const char *proc)
-{
- SCM result;
- if (fd == -1)
- scm_syserror (proc);
- result = scm_fdes_to_port (fd, "r+0", sym_socket);
- return result;
-}
-
-
-#define SCM_SOCK_FD_TO_PORT(fd) (scm_sock_fd_to_port((fd),FUNC_NAME))
-
-SCM_DEFINE (scm_socket, "socket", 3, 0, 0,
- (SCM family, SCM style, SCM proto),
- "Returns a new socket port of the type specified by @var{family}, @var{style}\n"
- "and @var{protocol}. All three parameters are integers. Typical values\n"
- "for @var{family} are the values of @code{AF_UNIX}\n"
- "and @code{AF_INET}. Typical values for @var{style} are\n"
- "the values of @code{SOCK_STREAM}, @code{SOCK_DGRAM} and @code{SOCK_RAW}.\n\n"
- "@var{protocol} can be obtained from a protocol name using\n"
- "@code{getprotobyname}. A value of\n"
- "zero specifies the default protocol, which is usually right.\n\n"
- "A single socket port cannot by used for communication until\n"
- "it has been connected to another socket.")
-#define FUNC_NAME s_scm_socket
-{
- int fd;
- SCM result;
-
- SCM_VALIDATE_INUM (1,family);
- SCM_VALIDATE_INUM (2,style);
- SCM_VALIDATE_INUM (3,proto);
- fd = socket (SCM_INUM (family), SCM_INUM (style), SCM_INUM (proto));
- result = SCM_SOCK_FD_TO_PORT (fd);
- return result;
-}
-#undef FUNC_NAME
-
-
-
-#ifdef HAVE_SOCKETPAIR
-SCM_DEFINE (scm_socketpair, "socketpair", 3, 0, 0,
- (SCM family, SCM style, SCM proto),
- "Returns a pair of connected (but unnamed) socket ports of the type specified\n"
- "by @var{family}, @var{style} and @var{protocol}.\n"
- "Many systems support only\n"
- "socket pairs of the @code{AF_UNIX} family. Zero is likely to be\n"
- "the only meaningful value for @var{protocol}.")
-#define FUNC_NAME s_scm_socketpair
-{
- int fam;
- int fd[2];
- SCM a;
- SCM b;
-
- SCM_VALIDATE_INUM (1,family);
- SCM_VALIDATE_INUM (2,style);
- SCM_VALIDATE_INUM (3,proto);
-
- fam = SCM_INUM (family);
-
- if (socketpair (fam, SCM_INUM (style), SCM_INUM (proto), fd) == -1)
- SCM_SYSERROR;
-
- a = SCM_SOCK_FD_TO_PORT(fd[0]);
- b = SCM_SOCK_FD_TO_PORT(fd[1]);
- return scm_cons (a, b);
-}
-#undef FUNC_NAME
-#endif
-
-SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0,
- (SCM sock, SCM level, SCM optname),
- "Returns the value of a particular socket option for the socket\n"
- "port @var{socket}. @var{level} is an integer code for type of option\n"
- "being requested, e.g., @code{SOL_SOCKET} for socket-level options.\n"
- "@var{optname} is an\n"
- "integer code for the option required and should be specified using one of\n"
- "the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n\n"
- "The returned value is typically an integer but @code{SO_LINGER} returns a\n"
- "pair of integers.")
-#define FUNC_NAME s_scm_getsockopt
-{
- int fd;
- int optlen;
-#ifdef HAVE_STRUCT_LINGER
- char optval[sizeof (struct linger)];
-#else
- char optval[sizeof (scm_sizet)];
-#endif
- int ilevel;
- int ioptname;
-
-#ifdef HAVE_STRUCT_LINGER
- optlen = (int) sizeof (struct linger);
-#else
- optlen = (int) sizeof (scm_sizet);
-#endif
-
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_INUM_COPY (2,level,ilevel);
- SCM_VALIDATE_INUM_COPY (3,optname,ioptname);
-
- fd = SCM_FPORT_FDES (sock);
- if (getsockopt (fd, ilevel, ioptname, (void *) optval, &optlen) == -1)
- SCM_SYSERROR;
-
-#ifdef SO_LINGER
- if (ilevel == SOL_SOCKET && ioptname == SO_LINGER)
- {
-#ifdef HAVE_STRUCT_LINGER
- struct linger *ling = (struct linger *) optval;
- return scm_cons (SCM_MAKINUM (ling->l_onoff),
- SCM_MAKINUM (ling->l_linger));
-#else
- scm_sizet *ling = (scm_sizet *) optval;
- return scm_cons (SCM_MAKINUM (*ling),
- SCM_MAKINUM (0));
-#endif
- }
-#endif
-#ifdef SO_SNDBUF
- if (ilevel == SOL_SOCKET && ioptname == SO_SNDBUF)
- {
- scm_sizet *bufsize = (scm_sizet *) optval;
- return SCM_MAKINUM (*bufsize);
- }
-#endif
-#ifdef SO_RCVBUF
- if (ilevel == SOL_SOCKET && ioptname == SO_RCVBUF)
- {
- scm_sizet *bufsize = (scm_sizet *) optval;
- return SCM_MAKINUM (*bufsize);
- }
-#endif
- return SCM_MAKINUM (*(int *) optval);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_setsockopt, "setsockopt", 4, 0, 0,
- (SCM sock, SCM level, SCM optname, SCM value),
- "Sets the value of a particular socket option for the socket\n"
- "port @var{socket}. @var{level} is an integer code for type of option\n"
- "being set, e.g., @code{SOL_SOCKET} for socket-level options.\n"
- "@var{optname} is an\n"
- "integer code for the option to set and should be specified using one of\n"
- "the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n"
- "@var{value} is the value to which the option should be set. For\n"
- "most options this must be an integer, but for @code{SO_LINGER} it must\n"
- "be a pair.\n\n"
- "The return value is unspecified.")
-#define FUNC_NAME s_scm_setsockopt
-{
- int fd;
- int optlen;
-#ifdef HAVE_STRUCT_LINGER
- char optval[sizeof (struct linger)]; /* Biggest option :-( */
-#else
- char optval[sizeof (scm_sizet)];
-#endif
- int ilevel, ioptname;
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_INUM_COPY (2,level,ilevel);
- SCM_VALIDATE_INUM_COPY (3,optname,ioptname);
- fd = SCM_FPORT_FDES (sock);
- if (0);
-#ifdef SO_LINGER
- else if (ilevel == SOL_SOCKET && ioptname == SO_LINGER)
- {
-#ifdef HAVE_STRUCT_LINGER
- struct linger ling;
- SCM_ASSERT (SCM_CONSP (value)
- && SCM_INUMP (SCM_CAR (value))
- && SCM_INUMP (SCM_CDR (value)),
- value, SCM_ARG4, FUNC_NAME);
- ling.l_onoff = SCM_INUM (SCM_CAR (value));
- ling.l_linger = SCM_INUM (SCM_CDR (value));
- optlen = (int) sizeof (struct linger);
- memcpy (optval, (void *) &ling, optlen);
-#else
- scm_sizet ling;
- SCM_ASSERT (SCM_CONSP (value)
- && SCM_INUMP (SCM_CAR (value))
- && SCM_INUMP (SCM_CDR (value)),
- value, SCM_ARG4, FUNC_NAME);
- ling = SCM_INUM (SCM_CAR (value));
- optlen = (int) sizeof (scm_sizet);
- (*(scm_sizet *) optval) = (scm_sizet) SCM_INUM (value);
-#endif
- }
-#endif
-#ifdef SO_SNDBUF
- else if (ilevel == SOL_SOCKET && ioptname == SO_SNDBUF)
- {
- SCM_VALIDATE_INUM (4,value);
- optlen = (int) sizeof (scm_sizet);
- (*(scm_sizet *) optval) = (scm_sizet) SCM_INUM (value);
- }
-#endif
-#ifdef SO_RCVBUF
- else if (ilevel == SOL_SOCKET && ioptname == SO_RCVBUF)
- {
- SCM_VALIDATE_INUM (4,value);
- optlen = (int) sizeof (scm_sizet);
- (*(scm_sizet *) optval) = (scm_sizet) SCM_INUM (value);
- }
-#endif
- else
- {
- /* Most options just take an int. */
- SCM_VALIDATE_INUM (4,value);
- optlen = (int) sizeof (int);
- (*(int *) optval) = (int) SCM_INUM (value);
- }
- if (setsockopt (fd, ilevel, ioptname, (void *) optval, optlen) == -1)
- SCM_SYSERROR;
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_shutdown, "shutdown", 2, 0, 0,
- (SCM sock, SCM how),
- "Sockets can be closed simply by using @code{close-port}. The\n"
- "@code{shutdown} procedure allows reception or tranmission on a\n"
- "connection to be shut down individually, according to the parameter\n"
- "@var{how}:\n\n"
- "@table @asis\n"
- "@item 0\n"
- "Stop receiving data for this socket. If further data arrives, reject it.\n"
- "@item 1\n"
- "Stop trying to transmit data from this socket. Discard any\n"
- "data waiting to be sent. Stop looking for acknowledgement of\n"
- "data already sent; don't retransmit it if it is lost.\n"
- "@item 2\n"
- "Stop both reception and transmission.\n"
- "@end table\n\n"
- "The return value is unspecified.")
-#define FUNC_NAME s_scm_shutdown
-{
- int fd;
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_INUM (2,how);
- SCM_ASSERT_RANGE(2,how,0 <= SCM_INUM (how) && 2 >= SCM_INUM (how));
- fd = SCM_FPORT_FDES (sock);
- if (shutdown (fd, SCM_INUM (how)) == -1)
- SCM_SYSERROR;
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-
-/* convert fam/address/args into a sockaddr of the appropriate type.
- args is modified by removing the arguments actually used.
- which_arg and proc are used when reporting errors:
- which_arg is the position of address in the original argument list.
- proc is the name of the original procedure.
- size returns the size of the structure allocated. */
-
-
-static struct sockaddr *
-scm_fill_sockaddr (int fam,SCM address,SCM *args,int which_arg,const char *proc,scm_sizet *size)
-{
- switch (fam)
- {
- case AF_INET:
- {
- SCM isport;
- struct sockaddr_in *soka;
-
- soka = (struct sockaddr_in *)
- scm_must_malloc (sizeof (struct sockaddr_in), proc);
- /* e.g., for BSDs which don't like invalid sin_len. */
- memset (soka, 0, sizeof (struct sockaddr_in));
- soka->sin_family = AF_INET;
- soka->sin_addr.s_addr =
- htonl (scm_num2ulong (address, (char *) which_arg, proc));
- SCM_ASSERT (SCM_CONSP (*args), *args,
- which_arg + 1, proc);
- isport = SCM_CAR (*args);
- *args = SCM_CDR (*args);
- SCM_ASSERT (SCM_INUMP (isport), isport, which_arg + 1, proc);
- soka->sin_port = htons (SCM_INUM (isport));
- *size = sizeof (struct sockaddr_in);
- return (struct sockaddr *) soka;
- }
-#ifdef HAVE_UNIX_DOMAIN_SOCKETS
- case AF_UNIX:
- {
- struct sockaddr_un *soka;
-
- soka = (struct sockaddr_un *)
- scm_must_malloc (sizeof (struct sockaddr_un), proc);
- memset (soka, 0, sizeof (struct sockaddr_un));
- soka->sun_family = AF_UNIX;
- SCM_ASSERT (SCM_ROSTRINGP (address), address,
- which_arg, proc);
- memcpy (soka->sun_path, SCM_ROCHARS (address),
- 1 + SCM_ROLENGTH (address));
- *size = sizeof (struct sockaddr_un);
- return (struct sockaddr *) soka;
- }
-#endif
- default:
- scm_out_of_range (proc, SCM_MAKINUM (fam));
- }
-}
-
-SCM_DEFINE (scm_connect, "connect", 3, 0, 1,
- (SCM sock, SCM fam, SCM address, SCM args),
- "Initiates a connection from @var{socket} to the address\n"
- "specified by @var{address} and possibly @var{arg @dots{}}. The format\n"
- "required for @var{address}\n"
- "and @var{arg} @dots{} depends on the family of the socket.\n\n"
- "For a socket of family @code{AF_UNIX},\n"
- "only @code{address} is specified and must be a string with the\n"
- "filename where the socket is to be created.\n\n"
- "For a socket of family @code{AF_INET},\n"
- "@code{address} must be an integer Internet host address and @var{arg} @dots{}\n"
- "must be a single integer port number.\n\n"
- "The return value is unspecified.")
-#define FUNC_NAME s_scm_connect
-{
- int fd;
- struct sockaddr *soka;
- scm_sizet size;
-
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_INUM (2,fam);
- fd = SCM_FPORT_FDES (sock);
- soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args, 3, FUNC_NAME, &size);
- if (connect (fd, soka, size) == -1)
- SCM_SYSERROR;
- scm_must_free ((char *) soka);
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_bind, "bind", 3, 0, 1,
- (SCM sock, SCM fam, SCM address, SCM args),
- "Assigns an address to the socket port @var{socket}.\n"
- "Generally this only needs to be done for server sockets,\n"
- "so they know where to look for incoming connections. A socket\n"
- "without an address will be assigned one automatically when it\n"
- "starts communicating.\n\n"
- "The format of @var{address} and @var{ARG} @dots{} depends on the family\n"
- "of the socket.\n\n"
- "For a socket of family @code{AF_UNIX}, only @var{address}\n"
- "is specified and must \n"
- "be a string with the filename where the socket is to be created.\n\n"
- "For a socket of family @code{AF_INET}, @var{address} must be an integer\n"
- "Internet host address and @var{arg} @dots{} must be a single integer\n"
- "port number.\n\n"
- "The values of the following variables can also be used for @var{address}:\n\n"
- "@defvar INADDR_ANY\n"
- "Allow connections from any address.\n"
- "@end defvar\n\n"
- "@defvar INADDR_LOOPBACK\n"
- "The address of the local host using the loopback device.\n"
- "@end defvar\n\n"
- "@defvar INADDR_BROADCAST\n"
- "The broadcast address on the local network.\n"
- "@end defvar\n\n"
- "@defvar INADDR_NONE\n"
- "No address.\n"
- "@end defvar\n\n"
- "The return value is unspecified.")
-#define FUNC_NAME s_scm_bind
-{
- int rv;
- struct sockaddr *soka;
- scm_sizet size;
- int fd;
-
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_INUM (2,fam);
- soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args, 3, FUNC_NAME, &size);
- fd = SCM_FPORT_FDES (sock);
- rv = bind (fd, soka, size);
- if (rv == -1)
- SCM_SYSERROR;
- scm_must_free ((char *) soka);
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_listen, "listen", 2, 0, 0,
- (SCM sock, SCM backlog),
- "This procedure enables @var{socket} to accept connection\n"
- "requests. @var{backlog} is an integer specifying\n"
- "the maximum length of the queue for pending connections.\n"
- "If the queue fills, new clients will fail to connect until the\n"
- "server calls @code{accept} to accept a connection from the queue.\n\n"
- "The return value is unspecified.")
-#define FUNC_NAME s_scm_listen
-{
- int fd;
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_INUM (2,backlog);
- fd = SCM_FPORT_FDES (sock);
- if (listen (fd, SCM_INUM (backlog)) == -1)
- SCM_SYSERROR;
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-
-/* Put the components of a sockaddr into a new SCM vector. */
-
-static SCM
-scm_addr_vector (struct sockaddr *address,const char *proc)
-{
- short int fam = address->sa_family;
- SCM result;
- SCM *ve;
-#ifdef HAVE_UNIX_DOMAIN_SOCKETS
- if (fam == AF_UNIX)
- {
- struct sockaddr_un *nad = (struct sockaddr_un *) address;
- result = scm_make_vector (SCM_MAKINUM (2), SCM_UNSPECIFIED);
- ve = SCM_VELTS (result);
- ve[0] = scm_ulong2num ((unsigned long) fam);
- ve[1] = scm_makfromstr (nad->sun_path,
- (scm_sizet) strlen (nad->sun_path), 0);
- }
- else
-#endif
- if (fam == AF_INET)
- {
- struct sockaddr_in *nad = (struct sockaddr_in *) address;
- result = scm_make_vector (SCM_MAKINUM (3), SCM_UNSPECIFIED);
- ve = SCM_VELTS (result);
- ve[0] = scm_ulong2num ((unsigned long) fam);
- ve[1] = scm_ulong2num (ntohl (nad->sin_addr.s_addr));
- ve[2] = scm_ulong2num ((unsigned long) ntohs (nad->sin_port));
- }
- else
- scm_misc_error (proc, "Unrecognised address family: ~A",
- scm_listify (SCM_MAKINUM (fam), SCM_UNDEFINED));
-
- return result;
-}
-
-/* Allocate a buffer large enough to hold any sockaddr type. */
-static char *scm_addr_buffer;
-static int scm_addr_buffer_size;
-
-static void
-scm_init_addr_buffer (void)
-{
- scm_addr_buffer_size =
-#ifdef HAVE_UNIX_DOMAIN_SOCKETS
- (int) sizeof (struct sockaddr_un)
-#else
- 0
-#endif
- ;
- if (sizeof (struct sockaddr_in) > scm_addr_buffer_size)
- scm_addr_buffer_size = (int) sizeof (struct sockaddr_in);
- scm_addr_buffer = scm_must_malloc (scm_addr_buffer_size, "address buffer");
-}
-
-SCM_DEFINE (scm_accept, "accept", 1, 0, 0,
- (SCM sock),
- "Accepts a connection on a bound, listening socket @var{socket}. If there\n"
- "are no pending connections in the queue, it waits until\n"
- "one is available unless the non-blocking option has been set on the\n"
- "socket.\n\n"
- "The return value is a\n"
- "pair in which the CAR is a new socket port for the connection and\n"
- "the CDR is an object with address information about the client which\n"
- "initiated the connection.\n\n"
- "If the address is not available then the CDR will be an empty vector.\n\n"
- "@var{socket} does not become part of the\n"
- "connection and will continue to accept new requests.")
-#define FUNC_NAME s_scm_accept
-{
- int fd;
- int newfd;
- SCM address;
- SCM newsock;
-
- int tmp_size;
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- fd = SCM_FPORT_FDES (sock);
- tmp_size = scm_addr_buffer_size;
- newfd = accept (fd, (struct sockaddr *) scm_addr_buffer, &tmp_size);
- newsock = scm_sock_fd_to_port (newfd, FUNC_NAME);
- if (tmp_size > 0)
- address = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME);
- else
- address = SCM_BOOL_F;
-
- return scm_cons (newsock, address);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_getsockname, "getsockname", 1, 0, 0,
- (SCM sock),
- "Returns the address of @var{socket}, in the same form as the object\n"
- "returned by @code{accept}. On many systems the address of a socket\n"
- "in the @code{AF_FILE} namespace cannot be read.")
-#define FUNC_NAME s_scm_getsockname
-{
- int tmp_size;
- int fd;
- SCM result;
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- fd = SCM_FPORT_FDES (sock);
- tmp_size = scm_addr_buffer_size;
- if (getsockname (fd, (struct sockaddr *) scm_addr_buffer, &tmp_size) == -1)
- SCM_SYSERROR;
- if (tmp_size > 0)
- result = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME);
- else
- result = SCM_BOOL_F;
- return result;
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_getpeername, "getpeername", 1, 0, 0,
- (SCM sock),
- "Returns the address of the socket that the socket @var{socket} is connected to,\n"
- "in the same form as the object\n"
- "returned by @code{accept}. On many systems the address of a socket\n"
- "in the @code{AF_FILE} namespace cannot be read.")
-#define FUNC_NAME s_scm_getpeername
-{
- int tmp_size;
- int fd;
- SCM result;
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- fd = SCM_FPORT_FDES (sock);
- tmp_size = scm_addr_buffer_size;
- if (getpeername (fd, (struct sockaddr *) scm_addr_buffer, &tmp_size) == -1)
- SCM_SYSERROR;
- if (tmp_size > 0)
- result = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME);
- else
- result = SCM_BOOL_F;
- return result;
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_recv, "recv!", 2, 1, 0,
- (SCM sock, SCM buf, SCM flags),
- "Receives data from the socket port @var{socket}. @var{socket} must already\n"
- "be bound to the address from which data is to be received.\n"
- "@var{buf} is a string into which\n"
- "the data will be written. The size of @var{buf} limits the amount of\n"
- "data which can be received: in the case of packet\n"
- "protocols, if a packet larger than this limit is encountered then some data\n"
- "will be irrevocably lost.\n\n"
- "The optional @var{flags} argument is a value or\n"
- "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
- "The value returned is the number of bytes read from the socket.\n\n"
- "Note that the data is read directly from the socket file descriptor:any unread buffered port data is ignored.")
-#define FUNC_NAME s_scm_recv
-{
- int rv;
- int fd;
- int flg;
-
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_STRING (2,buf);
- SCM_VALIDATE_INUM_DEF_COPY (3,flags,0,flg);
- fd = SCM_FPORT_FDES (sock);
-
- SCM_SYSCALL (rv = recv (fd, SCM_CHARS (buf), SCM_LENGTH (buf), flg));
- if (rv == -1)
- SCM_SYSERROR;
-
- return SCM_MAKINUM (rv);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_send, "send", 2, 1, 0,
- (SCM sock, SCM message, SCM flags),
- "Transmits the string @var{message} on the socket port @var{socket}. \n"
- "@var{socket} must already be bound to a destination address. The\n"
- "value returned is the number of bytes transmitted -- it's possible for\n"
- "this to be less than the length of @var{message} if the socket is\n"
- "set to be non-blocking. The optional @var{flags} argument is a value or\n"
- "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
- "Note that the data is written directly to the socket file descriptor:\n"
- "any unflushed buffered port data is ignored.")
-#define FUNC_NAME s_scm_send
-{
- int rv;
- int fd;
- int flg;
-
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_ROSTRING (2,message);
- SCM_VALIDATE_INUM_DEF_COPY (3,flags,0,flg);
- fd = SCM_FPORT_FDES (sock);
-
- SCM_SYSCALL (rv = send (fd, SCM_ROCHARS (message), SCM_ROLENGTH (message), flg));
- if (rv == -1)
- SCM_SYSERROR;
- return SCM_MAKINUM (rv);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_recvfrom, "recvfrom!", 2, 3, 0,
- (SCM sock, SCM buf, SCM flags, SCM start, SCM end),
- "Returns data from the socket port @var{socket} and also information about\n"
- "where the data was received from. @var{socket} must already\n"
- "be bound to the address from which data is to be received.\n"
- "@code{buf}, is a string into which\n"
- "the data will be written. The size of @var{buf} limits the amount of\n"
- "data which can be received: in the case of packet\n"
- "protocols, if a packet larger than this limit is encountered then some data\n"
- "will be irrevocably lost.\n\n"
- "The optional @var{flags} argument is a value or\n"
- "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
- "The value returned is a pair: the CAR is the number of bytes read from\n"
- "the socket and the CDR an address object in the same form as returned by\n"
- "@code{accept}.\n\n"
- "The @var{start} and @var{end} arguments specify a substring of @var{buf}\n"
- "to which the data should be written.\n\n"
- "Note that the data is read directly from the socket file descriptor:\n"
- "any unread buffered port data is ignored.")
-#define FUNC_NAME s_scm_recvfrom
-{
- int rv;
- int fd;
- int flg;
- int offset = 0;
- int cend;
- int tmp_size;
- SCM address;
-
- SCM_VALIDATE_OPFPORT (1,sock);
- SCM_VALIDATE_STRING (2,buf);
- cend = SCM_LENGTH (buf);
-
- if (SCM_UNBNDP (flags))
- flg = 0;
- else
- {
- flg = SCM_NUM2ULONG (3,flags);
-
- if (!SCM_UNBNDP (start))
- {
- offset = (int) SCM_NUM2LONG (4,start);
-
- if (offset < 0 || offset >= cend)
- SCM_OUT_OF_RANGE (4, start);
-
- if (!SCM_UNBNDP (end))
- {
- int tend = (int) SCM_NUM2LONG (5,end);
-
- if (tend <= offset || tend > cend)
- SCM_OUT_OF_RANGE (5, end);
-
- cend = tend;
- }
- }
- }
-
- fd = SCM_FPORT_FDES (sock);
-
- tmp_size = scm_addr_buffer_size;
- SCM_SYSCALL (rv = recvfrom (fd, SCM_CHARS (buf) + offset,
- cend - offset, flg,
- (struct sockaddr *) scm_addr_buffer,
- &tmp_size));
- if (rv == -1)
- SCM_SYSERROR;
- if (tmp_size > 0)
- address = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME);
- else
- address = SCM_BOOL_F;
-
- return scm_cons (SCM_MAKINUM (rv), address);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_sendto, "sendto", 4, 0, 1,
- (SCM sock, SCM message, SCM fam, SCM address, SCM args_and_flags),
- "Transmits the string @var{message} on the socket port @var{socket}. The\n"
- "destination address is specified using the @var{family}, @var{address} and\n"
- "@var{arg} arguments, in a similar way to the @code{connect}\n"
- "procedure. The\n"
- "value returned is the number of bytes transmitted -- it's possible for\n"
- "this to be less than the length of @var{message} if the socket is\n"
- "set to be non-blocking. The optional @var{flags} argument is a value or\n"
- "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
- "Note that the data is written directly to the socket file descriptor:\n"
- "any unflushed buffered port data is ignored.")
-#define FUNC_NAME s_scm_sendto
-{
- int rv;
- int fd;
- int flg;
- struct sockaddr *soka;
- scm_sizet size;
- int save_err;
-
- sock = SCM_COERCE_OUTPORT (sock);
- SCM_VALIDATE_FPORT (1,sock);
- SCM_VALIDATE_ROSTRING (2,message);
- SCM_VALIDATE_INUM (3,fam);
- fd = SCM_FPORT_FDES (sock);
- soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args_and_flags, 4,
- FUNC_NAME, &size);
- if (SCM_NULLP (args_and_flags))
- flg = 0;
- else
- {
- SCM_VALIDATE_CONS (5,args_and_flags);
- flg = SCM_NUM2ULONG (5,SCM_CAR (args_and_flags));
- }
- SCM_SYSCALL (rv = sendto (fd, SCM_ROCHARS (message), SCM_ROLENGTH (message),
- flg, soka, size));
- save_err = errno;
- scm_must_free ((char *) soka);
- errno = save_err;
- if (rv == -1)
- SCM_SYSERROR;
- return SCM_MAKINUM (rv);
-}
-#undef FUNC_NAME
-\f
-
-
-void
-scm_init_socket ()
-{
- /* protocol families. */
-#ifdef AF_UNSPEC
- scm_sysintern ("AF_UNSPEC", SCM_MAKINUM (AF_UNSPEC));
-#endif
-#ifdef AF_UNIX
- scm_sysintern ("AF_UNIX", SCM_MAKINUM (AF_UNIX));
-#endif
-#ifdef AF_INET
- scm_sysintern ("AF_INET", SCM_MAKINUM (AF_INET));
-#endif
-
-#ifdef PF_UNSPEC
- scm_sysintern ("PF_UNSPEC", SCM_MAKINUM (PF_UNSPEC));
-#endif
-#ifdef PF_UNIX
- scm_sysintern ("PF_UNIX", SCM_MAKINUM (PF_UNIX));
-#endif
-#ifdef PF_INET
- scm_sysintern ("PF_INET", SCM_MAKINUM (PF_INET));
-#endif
-
- /* socket types. */
-#ifdef SOCK_STREAM
- scm_sysintern ("SOCK_STREAM", SCM_MAKINUM (SOCK_STREAM));
-#endif
-#ifdef SOCK_DGRAM
- scm_sysintern ("SOCK_DGRAM", SCM_MAKINUM (SOCK_DGRAM));
-#endif
-#ifdef SOCK_RAW
- scm_sysintern ("SOCK_RAW", SCM_MAKINUM (SOCK_RAW));
-#endif
-
- /* setsockopt level. */
-#ifdef SOL_SOCKET
- scm_sysintern ("SOL_SOCKET", SCM_MAKINUM (SOL_SOCKET));
-#endif
-#ifdef SOL_IP
- scm_sysintern ("SOL_IP", SCM_MAKINUM (SOL_IP));
-#endif
-#ifdef SOL_TCP
- scm_sysintern ("SOL_TCP", SCM_MAKINUM (SOL_TCP));
-#endif
-#ifdef SOL_UDP
- scm_sysintern ("SOL_UDP", SCM_MAKINUM (SOL_UDP));
-#endif
-
- /* setsockopt names. */
-#ifdef SO_DEBUG
- scm_sysintern ("SO_DEBUG", SCM_MAKINUM (SO_DEBUG));
-#endif
-#ifdef SO_REUSEADDR
- scm_sysintern ("SO_REUSEADDR", SCM_MAKINUM (SO_REUSEADDR));
-#endif
-#ifdef SO_STYLE
- scm_sysintern ("SO_STYLE", SCM_MAKINUM (SO_STYLE));
-#endif
-#ifdef SO_TYPE
- scm_sysintern ("SO_TYPE", SCM_MAKINUM (SO_TYPE));
-#endif
-#ifdef SO_ERROR
- scm_sysintern ("SO_ERROR", SCM_MAKINUM (SO_ERROR));
-#endif
-#ifdef SO_DONTROUTE
- scm_sysintern ("SO_DONTROUTE", SCM_MAKINUM (SO_DONTROUTE));
-#endif
-#ifdef SO_BROADCAST
- scm_sysintern ("SO_BROADCAST", SCM_MAKINUM (SO_BROADCAST));
-#endif
-#ifdef SO_SNDBUF
- scm_sysintern ("SO_SNDBUF", SCM_MAKINUM (SO_SNDBUF));
-#endif
-#ifdef SO_RCVBUF
- scm_sysintern ("SO_RCVBUF", SCM_MAKINUM (SO_RCVBUF));
-#endif
-#ifdef SO_KEEPALIVE
- scm_sysintern ("SO_KEEPALIVE", SCM_MAKINUM (SO_KEEPALIVE));
-#endif
-#ifdef SO_OOBINLINE
- scm_sysintern ("SO_OOBINLINE", SCM_MAKINUM (SO_OOBINLINE));
-#endif
-#ifdef SO_NO_CHECK
- scm_sysintern ("SO_NO_CHECK", SCM_MAKINUM (SO_NO_CHECK));
-#endif
-#ifdef SO_PRIORITY
- scm_sysintern ("SO_PRIORITY", SCM_MAKINUM (SO_PRIORITY));
-#endif
-#ifdef SO_LINGER
- scm_sysintern ("SO_LINGER", SCM_MAKINUM (SO_LINGER));
-#endif
-
- /* recv/send options. */
-#ifdef MSG_OOB
- scm_sysintern ("MSG_OOB", SCM_MAKINUM (MSG_OOB));
-#endif
-#ifdef MSG_PEEK
- scm_sysintern ("MSG_PEEK", SCM_MAKINUM (MSG_PEEK));
-#endif
-#ifdef MSG_DONTROUTE
- scm_sysintern ("MSG_DONTROUTE", SCM_MAKINUM (MSG_DONTROUTE));
-#endif
-
- scm_add_feature ("socket");
- scm_init_addr_buffer ();
-
-#include "socket.x"
-}
-
+/* Copyright (C) 1996,1997,1998,2000,2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <errno.h>
+#include <gmp.h>
+
+#include "libguile/_scm.h"
+#include "libguile/unif.h"
+#include "libguile/feature.h"
+#include "libguile/fports.h"
+#include "libguile/strings.h"
+#include "libguile/vectors.h"
+#include "libguile/dynwind.h"
+
+#include "libguile/validate.h"
+#include "libguile/socket.h"
+
+#ifdef __MINGW32__
+#include "win32-socket.h"
+#endif
+
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <sys/types.h>
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#else
+#include <sys/socket.h>
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+#include <sys/un.h>
+#endif
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#endif
+
+#if defined (HAVE_UNIX_DOMAIN_SOCKETS) && !defined (SUN_LEN)
+#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+ + strlen ((ptr)->sun_path))
+#endif
+
+\f
+
+SCM_DEFINE (scm_htons, "htons", 1, 0, 0,
+ (SCM value),
+ "Convert a 16 bit quantity from host to network byte ordering.\n"
+ "@var{value} is packed into 2 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_htons
+{
+ return scm_from_ushort (htons (scm_to_ushort (value)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_ntohs, "ntohs", 1, 0, 0,
+ (SCM value),
+ "Convert a 16 bit quantity from network to host byte ordering.\n"
+ "@var{value} is packed into 2 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_ntohs
+{
+ return scm_from_ushort (ntohs (scm_to_ushort (value)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0,
+ (SCM value),
+ "Convert a 32 bit quantity from host to network byte ordering.\n"
+ "@var{value} is packed into 4 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_htonl
+{
+ scm_t_uint32 c_in = SCM_NUM2ULONG (1, value);
+
+ return scm_from_ulong (htonl (c_in));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_ntohl, "ntohl", 1, 0, 0,
+ (SCM value),
+ "Convert a 32 bit quantity from network to host byte ordering.\n"
+ "@var{value} is packed into 4 bytes, which are then converted\n"
+ "and returned as a new integer.")
+#define FUNC_NAME s_scm_ntohl
+{
+ scm_t_uint32 c_in = SCM_NUM2ULONG (1, value);
+
+ return scm_from_ulong (ntohl (c_in));
+}
+#undef FUNC_NAME
+
+#ifndef HAVE_INET_ATON
+/* for our definition in inet_aton.c, not usually needed. */
+extern int inet_aton ();
+#endif
+
+SCM_DEFINE (scm_inet_aton, "inet-aton", 1, 0, 0,
+ (SCM address),
+ "Convert an IPv4 Internet address from printable string\n"
+ "(dotted decimal notation) to an integer. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-aton \"127.0.0.1\") @result{} 2130706433\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_aton
+{
+ struct in_addr soka;
+ char *c_address;
+ int rv;
+
+ c_address = scm_to_locale_string (address);
+ rv = inet_aton (c_address, &soka);
+ free (c_address);
+ if (rv == 0)
+ SCM_MISC_ERROR ("bad address", SCM_EOL);
+ return scm_from_ulong (ntohl (soka.s_addr));
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_inet_ntoa, "inet-ntoa", 1, 0, 0,
+ (SCM inetid),
+ "Convert an IPv4 Internet address to a printable\n"
+ "(dotted decimal notation) string. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-ntoa 2130706433) @result{} \"127.0.0.1\"\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_ntoa
+{
+ struct in_addr addr;
+ char *s;
+ SCM answer;
+ addr.s_addr = htonl (SCM_NUM2ULONG (1, inetid));
+ s = inet_ntoa (addr);
+ answer = scm_from_locale_string (s);
+ return answer;
+}
+#undef FUNC_NAME
+
+#ifdef HAVE_INET_NETOF
+SCM_DEFINE (scm_inet_netof, "inet-netof", 1, 0, 0,
+ (SCM address),
+ "Return the network number part of the given IPv4\n"
+ "Internet address. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-netof 2130706433) @result{} 127\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_netof
+{
+ struct in_addr addr;
+ addr.s_addr = htonl (SCM_NUM2ULONG (1, address));
+ return scm_from_ulong (inet_netof (addr));
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_INET_LNAOF
+SCM_DEFINE (scm_lnaof, "inet-lnaof", 1, 0, 0,
+ (SCM address),
+ "Return the local-address-with-network part of the given\n"
+ "IPv4 Internet address, using the obsolete class A/B/C system.\n"
+ "E.g.,\n\n"
+ "@lisp\n"
+ "(inet-lnaof 2130706433) @result{} 1\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_lnaof
+{
+ struct in_addr addr;
+ addr.s_addr = htonl (SCM_NUM2ULONG (1, address));
+ return scm_from_ulong (inet_lnaof (addr));
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_INET_MAKEADDR
+SCM_DEFINE (scm_inet_makeaddr, "inet-makeaddr", 2, 0, 0,
+ (SCM net, SCM lna),
+ "Make an IPv4 Internet address by combining the network number\n"
+ "@var{net} with the local-address-within-network number\n"
+ "@var{lna}. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-makeaddr 127 1) @result{} 2130706433\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_makeaddr
+{
+ struct in_addr addr;
+ unsigned long netnum;
+ unsigned long lnanum;
+
+ netnum = SCM_NUM2ULONG (1, net);
+ lnanum = SCM_NUM2ULONG (2, lna);
+ addr = inet_makeaddr (netnum, lnanum);
+ return scm_from_ulong (ntohl (addr.s_addr));
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_IPV6
+
+/* flip a 128 bit IPv6 address between host and network order. */
+#ifdef WORDS_BIGENDIAN
+#define FLIP_NET_HOST_128(addr)
+#else
+#define FLIP_NET_HOST_128(addr)\
+{\
+ int i;\
+ \
+ for (i = 0; i < 8; i++)\
+ {\
+ scm_t_uint8 c = (addr)[i];\
+ \
+ (addr)[i] = (addr)[15 - i];\
+ (addr)[15 - i] = c;\
+ }\
+}
+#endif
+
+#ifdef WORDS_BIGENDIAN
+#define FLIPCPY_NET_HOST_128(dest, src) memcpy (dest, src, 16)
+#else
+#define FLIPCPY_NET_HOST_128(dest, src) \
+{ \
+ const scm_t_uint8 *tmp_srcp = (src) + 15; \
+ scm_t_uint8 *tmp_destp = (dest); \
+ \
+ do { \
+ *tmp_destp++ = *tmp_srcp--; \
+ } while (tmp_srcp != (src)); \
+}
+#endif
+
+
+#if (SIZEOF_SCM_T_BITS * SCM_CHAR_BIT) > 128
+#error "Assumption that scm_t_bits <= 128 bits has been violated."
+#endif
+
+#if (SIZEOF_UNSIGNED_LONG * SCM_CHAR_BIT) > 128
+#error "Assumption that unsigned long <= 128 bits has been violated."
+#endif
+
+#if (SIZEOF_UNSIGNED_LONG_LONG * SCM_CHAR_BIT) > 128
+#error "Assumption that unsigned long long <= 128 bits has been violated."
+#endif
+
+/* convert a 128 bit IPv6 address in network order to a host ordered
+ SCM integer. */
+static SCM
+scm_from_ipv6 (const scm_t_uint8 *src)
+{
+ SCM result = scm_i_mkbig ();
+ mpz_import (SCM_I_BIG_MPZ (result),
+ 1, /* chunk */
+ 1, /* big-endian chunk ordering */
+ 16, /* chunks are 16 bytes long */
+ 1, /* big-endian byte ordering */
+ 0, /* "nails" -- leading unused bits per chunk */
+ src);
+ return scm_i_normbig (result);
+}
+
+/* convert a host ordered SCM integer to a 128 bit IPv6 address in
+ network order. */
+static void
+scm_to_ipv6 (scm_t_uint8 dst[16], SCM src)
+{
+ if (SCM_I_INUMP (src))
+ {
+ scm_t_signed_bits n = SCM_I_INUM (src);
+ if (n < 0)
+ scm_out_of_range (NULL, src);
+#ifdef WORDS_BIGENDIAN
+ memset (dst, 0, 16 - sizeof (scm_t_signed_bits));
+ memcpy (dst + (16 - sizeof (scm_t_signed_bits)),
+ &n,
+ sizeof (scm_t_signed_bits));
+#else
+ memset (dst + sizeof (scm_t_signed_bits),
+ 0,
+ 16 - sizeof (scm_t_signed_bits));
+ /* FIXME: this pair of ops is kinda wasteful -- should rewrite as
+ a single loop perhaps, similar to the handling of bignums. */
+ memcpy (dst, &n, sizeof (scm_t_signed_bits));
+ FLIP_NET_HOST_128 (dst);
+#endif
+ }
+ else if (SCM_BIGP (src))
+ {
+ size_t count;
+
+ if ((mpz_sgn (SCM_I_BIG_MPZ (src)) < 0)
+ || mpz_sizeinbase (SCM_I_BIG_MPZ (src), 2) > 128)
+ scm_out_of_range (NULL, src);
+
+ memset (dst, 0, 16);
+ mpz_export (dst,
+ &count,
+ 1, /* big-endian chunk ordering */
+ 16, /* chunks are 16 bytes long */
+ 1, /* big-endian byte ordering */
+ 0, /* "nails" -- leading unused bits per chunk */
+ SCM_I_BIG_MPZ (src));
+ scm_remember_upto_here_1 (src);
+ }
+ else
+ scm_wrong_type_arg (NULL, 0, src);
+}
+
+#ifdef HAVE_INET_PTON
+SCM_DEFINE (scm_inet_pton, "inet-pton", 2, 0, 0,
+ (SCM family, SCM address),
+ "Convert a string containing a printable network address to\n"
+ "an integer address. Note that unlike the C version of this\n"
+ "function,\n"
+ "the result is an integer with normal host byte ordering.\n"
+ "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-pton AF_INET \"127.0.0.1\") @result{} 2130706433\n"
+ "(inet-pton AF_INET6 \"::1\") @result{} 1\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_pton
+{
+ int af;
+ char *src;
+ char dst[16];
+ int rv, eno;
+
+ af = scm_to_int (family);
+ SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6);
+ src = scm_to_locale_string (address);
+ rv = inet_pton (af, src, dst);
+ eno = errno;
+ free (src);
+ errno = eno;
+ if (rv == -1)
+ SCM_SYSERROR;
+ else if (rv == 0)
+ SCM_MISC_ERROR ("Bad address", SCM_EOL);
+ if (af == AF_INET)
+ return scm_from_ulong (ntohl (*(scm_t_uint32 *) dst));
+ else
+ return scm_from_ipv6 ((char *) dst);
+}
+#undef FUNC_NAME
+#endif
+
+#ifdef HAVE_INET_NTOP
+SCM_DEFINE (scm_inet_ntop, "inet-ntop", 2, 0, 0,
+ (SCM family, SCM address),
+ "Convert a network address into a printable string.\n"
+ "Note that unlike the C version of this function,\n"
+ "the input is an integer with normal host byte ordering.\n"
+ "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n"
+ "@lisp\n"
+ "(inet-ntop AF_INET 2130706433) @result{} \"127.0.0.1\"\n"
+ "(inet-ntop AF_INET6 (- (expt 2 128) 1)) @result{}\n"
+ "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_inet_ntop
+{
+ int af;
+#ifdef INET6_ADDRSTRLEN
+ char dst[INET6_ADDRSTRLEN];
+#else
+ char dst[46];
+#endif
+ char addr6[16];
+
+ af = scm_to_int (family);
+ SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6);
+ if (af == AF_INET)
+ *(scm_t_uint32 *) addr6 = htonl (SCM_NUM2ULONG (2, address));
+ else
+ scm_to_ipv6 (addr6, address);
+ if (inet_ntop (af, &addr6, dst, sizeof dst) == NULL)
+ SCM_SYSERROR;
+ return scm_from_locale_string (dst);
+}
+#undef FUNC_NAME
+#endif
+
+#endif /* HAVE_IPV6 */
+
+SCM_SYMBOL (sym_socket, "socket");
+
+#define SCM_SOCK_FD_TO_PORT(fd) scm_fdes_to_port (fd, "r+0", sym_socket)
+
+SCM_DEFINE (scm_socket, "socket", 3, 0, 0,
+ (SCM family, SCM style, SCM proto),
+ "Return a new socket port of the type specified by @var{family},\n"
+ "@var{style} and @var{proto}. All three parameters are\n"
+ "integers. Supported values for @var{family} are\n"
+ "@code{AF_UNIX}, @code{AF_INET} and @code{AF_INET6}.\n"
+ "Typical values for @var{style} are @code{SOCK_STREAM},\n"
+ "@code{SOCK_DGRAM} and @code{SOCK_RAW}.\n\n"
+ "@var{proto} can be obtained from a protocol name using\n"
+ "@code{getprotobyname}. A value of zero specifies the default\n"
+ "protocol, which is usually right.\n\n"
+ "A single socket port cannot by used for communication until it\n"
+ "has been connected to another socket.")
+#define FUNC_NAME s_scm_socket
+{
+ int fd;
+
+ fd = socket (scm_to_int (family),
+ scm_to_int (style),
+ scm_to_int (proto));
+ if (fd == -1)
+ SCM_SYSERROR;
+ return SCM_SOCK_FD_TO_PORT (fd);
+}
+#undef FUNC_NAME
+
+#ifdef HAVE_SOCKETPAIR
+SCM_DEFINE (scm_socketpair, "socketpair", 3, 0, 0,
+ (SCM family, SCM style, SCM proto),
+ "Return a pair of connected (but unnamed) socket ports of the\n"
+ "type specified by @var{family}, @var{style} and @var{proto}.\n"
+ "Many systems support only socket pairs of the @code{AF_UNIX}\n"
+ "family. Zero is likely to be the only meaningful value for\n"
+ "@var{proto}.")
+#define FUNC_NAME s_scm_socketpair
+{
+ int fam;
+ int fd[2];
+
+ fam = scm_to_int (family);
+
+ if (socketpair (fam, scm_to_int (style), scm_to_int (proto), fd) == -1)
+ SCM_SYSERROR;
+
+ return scm_cons (SCM_SOCK_FD_TO_PORT (fd[0]), SCM_SOCK_FD_TO_PORT (fd[1]));
+}
+#undef FUNC_NAME
+#endif
+
+SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0,
+ (SCM sock, SCM level, SCM optname),
+ "Return the value of a particular socket option for the socket\n"
+ "port @var{sock}. @var{level} is an integer code for type of\n"
+ "option being requested, e.g., @code{SOL_SOCKET} for\n"
+ "socket-level options. @var{optname} is an integer code for the\n"
+ "option required and should be specified using one of the\n"
+ "symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n\n"
+ "The returned value is typically an integer but @code{SO_LINGER}\n"
+ "returns a pair of integers.")
+#define FUNC_NAME s_scm_getsockopt
+{
+ int fd;
+ /* size of optval is the largest supported option. */
+#ifdef HAVE_STRUCT_LINGER
+ char optval[sizeof (struct linger)];
+ int optlen = sizeof (struct linger);
+#else
+ char optval[sizeof (size_t)];
+ int optlen = sizeof (size_t);
+#endif
+ int ilevel;
+ int ioptname;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ ilevel = scm_to_int (level);
+ ioptname = scm_to_int (optname);
+
+ fd = SCM_FPORT_FDES (sock);
+ if (getsockopt (fd, ilevel, ioptname, (void *) optval, &optlen) == -1)
+ SCM_SYSERROR;
+
+ if (ilevel == SOL_SOCKET)
+ {
+#ifdef SO_LINGER
+ if (ioptname == SO_LINGER)
+ {
+#ifdef HAVE_STRUCT_LINGER
+ struct linger *ling = (struct linger *) optval;
+
+ return scm_cons (scm_from_long (ling->l_onoff),
+ scm_from_long (ling->l_linger));
+#else
+ return scm_cons (scm_from_long (*(int *) optval),
+ scm_from_int (0));
+#endif
+ }
+ else
+#endif
+ if (0
+#ifdef SO_SNDBUF
+ || ioptname == SO_SNDBUF
+#endif
+#ifdef SO_RCVBUF
+ || ioptname == SO_RCVBUF
+#endif
+ )
+ {
+ return scm_from_size_t (*(size_t *) optval);
+ }
+ }
+ return scm_from_int (*(int *) optval);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_setsockopt, "setsockopt", 4, 0, 0,
+ (SCM sock, SCM level, SCM optname, SCM value),
+ "Set the value of a particular socket option for the socket\n"
+ "port @var{sock}. @var{level} is an integer code for type of option\n"
+ "being set, e.g., @code{SOL_SOCKET} for socket-level options.\n"
+ "@var{optname} is an\n"
+ "integer code for the option to set and should be specified using one of\n"
+ "the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n"
+ "@var{value} is the value to which the option should be set. For\n"
+ "most options this must be an integer, but for @code{SO_LINGER} it must\n"
+ "be a pair.\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_setsockopt
+{
+ int fd;
+
+ int opt_int;
+#ifdef HAVE_STRUCT_LINGER
+ struct linger opt_linger;
+#endif
+
+#if HAVE_STRUCT_IP_MREQ
+ struct ip_mreq opt_mreq;
+#endif
+
+ const void *optval = NULL;
+ socklen_t optlen = 0;
+
+ int ilevel, ioptname;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+
+ SCM_VALIDATE_OPFPORT (1, sock);
+ ilevel = scm_to_int (level);
+ ioptname = scm_to_int (optname);
+
+ fd = SCM_FPORT_FDES (sock);
+
+ if (ilevel == SOL_SOCKET)
+ {
+#ifdef SO_LINGER
+ if (ioptname == SO_LINGER)
+ {
+#ifdef HAVE_STRUCT_LINGER
+ SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME);
+ opt_linger.l_onoff = scm_to_int (SCM_CAR (value));
+ opt_linger.l_linger = scm_to_int (SCM_CDR (value));
+ optlen = sizeof (struct linger);
+ optval = &opt_linger;
+#else
+ SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME);
+ opt_int = scm_to_int (SCM_CAR (value));
+ /* timeout is ignored, but may as well validate it. */
+ scm_to_int (SCM_CDR (value));
+ optlen = sizeof (int);
+ optval = &opt_int;
+#endif
+ }
+ else
+#endif
+ if (0
+#ifdef SO_SNDBUF
+ || ioptname == SO_SNDBUF
+#endif
+#ifdef SO_RCVBUF
+ || ioptname == SO_RCVBUF
+#endif
+ )
+ {
+ opt_int = scm_to_int (value);
+ optlen = sizeof (size_t);
+ optval = &opt_int;
+ }
+ }
+
+#if HAVE_STRUCT_IP_MREQ
+ if (ilevel == IPPROTO_IP &&
+ (ioptname == IP_ADD_MEMBERSHIP || ioptname == IP_DROP_MEMBERSHIP))
+ {
+ /* Fourth argument must be a pair of addresses. */
+ SCM_ASSERT (scm_is_pair (value), value, SCM_ARG4, FUNC_NAME);
+ opt_mreq.imr_multiaddr.s_addr = htonl (scm_to_ulong (SCM_CAR (value)));
+ opt_mreq.imr_interface.s_addr = htonl (scm_to_ulong (SCM_CDR (value)));
+ optlen = sizeof (opt_mreq);
+ optval = &opt_mreq;
+ }
+#endif
+
+ if (optval == NULL)
+ {
+ /* Most options take an int. */
+ opt_int = scm_to_int (value);
+ optlen = sizeof (int);
+ optval = &opt_int;
+ }
+
+ if (setsockopt (fd, ilevel, ioptname, optval, optlen) == -1)
+ SCM_SYSERROR;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_shutdown, "shutdown", 2, 0, 0,
+ (SCM sock, SCM how),
+ "Sockets can be closed simply by using @code{close-port}. The\n"
+ "@code{shutdown} procedure allows reception or transmission on a\n"
+ "connection to be shut down individually, according to the parameter\n"
+ "@var{how}:\n\n"
+ "@table @asis\n"
+ "@item 0\n"
+ "Stop receiving data for this socket. If further data arrives, reject it.\n"
+ "@item 1\n"
+ "Stop trying to transmit data from this socket. Discard any\n"
+ "data waiting to be sent. Stop looking for acknowledgement of\n"
+ "data already sent; don't retransmit it if it is lost.\n"
+ "@item 2\n"
+ "Stop both reception and transmission.\n"
+ "@end table\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_shutdown
+{
+ int fd;
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (shutdown (fd, scm_to_signed_integer (how, 0, 2)) == -1)
+ SCM_SYSERROR;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+/* convert fam/address/args into a sockaddr of the appropriate type.
+ args is modified by removing the arguments actually used.
+ which_arg and proc are used when reporting errors:
+ which_arg is the position of address in the original argument list.
+ proc is the name of the original procedure.
+ size returns the size of the structure allocated. */
+
+static struct sockaddr *
+scm_fill_sockaddr (int fam, SCM address, SCM *args, int which_arg,
+ const char *proc, int *size)
+#define FUNC_NAME proc
+{
+ switch (fam)
+ {
+ case AF_INET:
+ {
+ struct sockaddr_in *soka;
+ unsigned long addr;
+ int port;
+
+ SCM_VALIDATE_ULONG_COPY (which_arg, address, addr);
+ SCM_VALIDATE_CONS (which_arg + 1, *args);
+ port = scm_to_int (SCM_CAR (*args));
+ *args = SCM_CDR (*args);
+ soka = (struct sockaddr_in *) scm_malloc (sizeof (struct sockaddr_in));
+ if (!soka)
+ scm_memory_error (proc);
+#if HAVE_STRUCT_SOCKADDR_SIN_LEN
+ soka->sin_len = sizeof (struct sockaddr_in);
+#endif
+ soka->sin_family = AF_INET;
+ soka->sin_addr.s_addr = htonl (addr);
+ soka->sin_port = htons (port);
+ *size = sizeof (struct sockaddr_in);
+ return (struct sockaddr *) soka;
+ }
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ {
+ /* see RFC2553. */
+ int port;
+ struct sockaddr_in6 *soka;
+ unsigned long flowinfo = 0;
+ unsigned long scope_id = 0;
+
+ SCM_VALIDATE_CONS (which_arg + 1, *args);
+ port = scm_to_int (SCM_CAR (*args));
+ *args = SCM_CDR (*args);
+ if (scm_is_pair (*args))
+ {
+ SCM_VALIDATE_ULONG_COPY (which_arg + 2, SCM_CAR (*args), flowinfo);
+ *args = SCM_CDR (*args);
+ if (scm_is_pair (*args))
+ {
+ SCM_VALIDATE_ULONG_COPY (which_arg + 3, SCM_CAR (*args),
+ scope_id);
+ *args = SCM_CDR (*args);
+ }
+ }
+ soka = (struct sockaddr_in6 *) scm_malloc (sizeof (struct sockaddr_in6));
+ if (!soka)
+ scm_memory_error (proc);
+#if HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN
+ soka->sin6_len = sizeof (struct sockaddr_in6);
+#endif
+ soka->sin6_family = AF_INET6;
+ scm_to_ipv6 (soka->sin6_addr.s6_addr, address);
+ soka->sin6_port = htons (port);
+ soka->sin6_flowinfo = flowinfo;
+#ifdef HAVE_SIN6_SCOPE_ID
+ soka->sin6_scope_id = scope_id;
+#endif
+ *size = sizeof (struct sockaddr_in6);
+ return (struct sockaddr *) soka;
+ }
+#endif
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+ case AF_UNIX:
+ {
+ struct sockaddr_un *soka;
+ int addr_size;
+ char *c_address;
+
+ scm_frame_begin (0);
+
+ c_address = scm_to_locale_string (address);
+ scm_frame_free (c_address);
+
+ /* the static buffer size in sockaddr_un seems to be arbitrary
+ and not necessarily a hard limit. e.g., the glibc manual
+ suggests it may be possible to declare it size 0. let's
+ ignore it. if the O/S doesn't like the size it will cause
+ connect/bind etc., to fail. sun_path is always the last
+ member of the structure. */
+ addr_size = sizeof (struct sockaddr_un)
+ + max (0, strlen (c_address) + 1 - (sizeof soka->sun_path));
+ soka = (struct sockaddr_un *) scm_malloc (addr_size);
+ memset (soka, 0, addr_size); /* for sun_len: see sin_len above. */
+ soka->sun_family = AF_UNIX;
+ strcpy (soka->sun_path, c_address);
+ *size = SUN_LEN (soka);
+
+ scm_frame_end ();
+ return (struct sockaddr *) soka;
+ }
+#endif
+ default:
+ scm_out_of_range (proc, scm_from_int (fam));
+ }
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_connect, "connect", 3, 0, 1,
+ (SCM sock, SCM fam, SCM address, SCM args),
+ "Initiate a connection from a socket using a specified address\n"
+ "family to the address\n"
+ "specified by @var{address} and possibly @var{args}.\n"
+ "The format required for @var{address}\n"
+ "and @var{args} depends on the family of the socket.\n\n"
+ "For a socket of family @code{AF_UNIX},\n"
+ "only @var{address} is specified and must be a string with the\n"
+ "filename where the socket is to be created.\n\n"
+ "For a socket of family @code{AF_INET},\n"
+ "@var{address} must be an integer IPv4 host address and\n"
+ "@var{args} must be a single integer port number.\n\n"
+ "For a socket of family @code{AF_INET6},\n"
+ "@var{address} must be an integer IPv6 host address and\n"
+ "@var{args} may be up to three integers:\n"
+ "port [flowinfo] [scope_id],\n"
+ "where flowinfo and scope_id default to zero.\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_connect
+{
+ int fd;
+ struct sockaddr *soka;
+ int size;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ soka = scm_fill_sockaddr (scm_to_int (fam), address, &args, 3, FUNC_NAME,
+ &size);
+ if (connect (fd, soka, size) == -1)
+ {
+ int save_errno = errno;
+
+ free (soka);
+ errno = save_errno;
+ SCM_SYSERROR;
+ }
+ free (soka);
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_bind, "bind", 3, 0, 1,
+ (SCM sock, SCM fam, SCM address, SCM args),
+ "Assign an address to the socket port @var{sock}.\n"
+ "Generally this only needs to be done for server sockets,\n"
+ "so they know where to look for incoming connections. A socket\n"
+ "without an address will be assigned one automatically when it\n"
+ "starts communicating.\n\n"
+ "The format of @var{address} and @var{args} depends\n"
+ "on the family of the socket.\n\n"
+ "For a socket of family @code{AF_UNIX}, only @var{address}\n"
+ "is specified and must be a string with the filename where\n"
+ "the socket is to be created.\n\n"
+ "For a socket of family @code{AF_INET}, @var{address}\n"
+ "must be an integer IPv4 address and @var{args}\n"
+ "must be a single integer port number.\n\n"
+ "The values of the following variables can also be used for\n"
+ "@var{address}:\n\n"
+ "@defvar INADDR_ANY\n"
+ "Allow connections from any address.\n"
+ "@end defvar\n\n"
+ "@defvar INADDR_LOOPBACK\n"
+ "The address of the local host using the loopback device.\n"
+ "@end defvar\n\n"
+ "@defvar INADDR_BROADCAST\n"
+ "The broadcast address on the local network.\n"
+ "@end defvar\n\n"
+ "@defvar INADDR_NONE\n"
+ "No address.\n"
+ "@end defvar\n\n"
+ "For a socket of family @code{AF_INET6}, @var{address}\n"
+ "must be an integer IPv6 address and @var{args}\n"
+ "may be up to three integers:\n"
+ "port [flowinfo] [scope_id],\n"
+ "where flowinfo and scope_id default to zero.\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_bind
+{
+ struct sockaddr *soka;
+ int size;
+ int fd;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ soka = scm_fill_sockaddr (scm_to_int (fam), address, &args, 3, FUNC_NAME,
+ &size);
+ fd = SCM_FPORT_FDES (sock);
+ if (bind (fd, soka, size) == -1)
+ {
+ int save_errno = errno;
+
+ free (soka);
+ errno = save_errno;
+ SCM_SYSERROR;
+ }
+ free (soka);
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_listen, "listen", 2, 0, 0,
+ (SCM sock, SCM backlog),
+ "Enable @var{sock} to accept connection\n"
+ "requests. @var{backlog} is an integer specifying\n"
+ "the maximum length of the queue for pending connections.\n"
+ "If the queue fills, new clients will fail to connect until\n"
+ "the server calls @code{accept} to accept a connection from\n"
+ "the queue.\n\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_listen
+{
+ int fd;
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (listen (fd, scm_to_int (backlog)) == -1)
+ SCM_SYSERROR;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+/* Put the components of a sockaddr into a new SCM vector. */
+static SCM
+scm_addr_vector (const struct sockaddr *address, int addr_size,
+ const char *proc)
+{
+ short int fam = address->sa_family;
+ SCM result =SCM_EOL;
+
+
+ switch (fam)
+ {
+ case AF_INET:
+ {
+ const struct sockaddr_in *nad = (struct sockaddr_in *) address;
+
+ result = scm_c_make_vector (3, SCM_UNSPECIFIED);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0,
+ scm_from_short (fam));
+ SCM_SIMPLE_VECTOR_SET(result, 1,
+ scm_from_ulong (ntohl (nad->sin_addr.s_addr)));
+ SCM_SIMPLE_VECTOR_SET(result, 2,
+ scm_from_ushort (ntohs (nad->sin_port)));
+ }
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ {
+ const struct sockaddr_in6 *nad = (struct sockaddr_in6 *) address;
+
+ result = scm_c_make_vector (5, SCM_UNSPECIFIED);
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_short (fam));
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_ipv6 (nad->sin6_addr.s6_addr));
+ SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_ushort (ntohs (nad->sin6_port)));
+ SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_uint32 (nad->sin6_flowinfo));
+#ifdef HAVE_SIN6_SCOPE_ID
+ SCM_SIMPLE_VECTOR_SET(result, 4, scm_from_ulong (nad->sin6_scope_id));
+#else
+ SCM_SIMPLE_VECTOR_SET(result, 4, SCM_INUM0);
+#endif
+ }
+ break;
+#endif
+#ifdef HAVE_UNIX_DOMAIN_SOCKETS
+ case AF_UNIX:
+ {
+ const struct sockaddr_un *nad = (struct sockaddr_un *) address;
+
+ result = scm_c_make_vector (2, SCM_UNSPECIFIED);
+
+ SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_short (fam));
+ /* When addr_size is not enough to cover sun_path, do not try
+ to access it. */
+ if (addr_size <= offsetof (struct sockaddr_un, sun_path))
+ SCM_SIMPLE_VECTOR_SET(result, 1, SCM_BOOL_F);
+ else
+ SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (nad->sun_path));
+ }
+ break;
+#endif
+ default:
+ scm_misc_error (proc, "Unrecognised address family: ~A",
+ scm_list_1 (scm_from_int (fam)));
+ }
+ return result;
+}
+
+/* calculate the size of a buffer large enough to hold any supported
+ sockaddr type. if the buffer isn't large enough, certain system
+ calls will return a truncated address. */
+
+#if defined (HAVE_UNIX_DOMAIN_SOCKETS)
+#define MAX_SIZE_UN sizeof (struct sockaddr_un)
+#else
+#define MAX_SIZE_UN 0
+#endif
+
+#if defined (HAVE_IPV6)
+#define MAX_SIZE_IN6 sizeof (struct sockaddr_in6)
+#else
+#define MAX_SIZE_IN6 0
+#endif
+
+#define MAX_ADDR_SIZE max (max (sizeof (struct sockaddr_in), MAX_SIZE_IN6),\
+ MAX_SIZE_UN)
+
+SCM_DEFINE (scm_accept, "accept", 1, 0, 0,
+ (SCM sock),
+ "Accept a connection on a bound, listening socket.\n"
+ "If there\n"
+ "are no pending connections in the queue, wait until\n"
+ "one is available unless the non-blocking option has been\n"
+ "set on the socket.\n\n"
+ "The return value is a\n"
+ "pair in which the @emph{car} is a new socket port for the\n"
+ "connection and\n"
+ "the @emph{cdr} is an object with address information about the\n"
+ "client which initiated the connection.\n\n"
+ "@var{sock} does not become part of the\n"
+ "connection and will continue to accept new requests.")
+#define FUNC_NAME s_scm_accept
+{
+ int fd;
+ int newfd;
+ SCM address;
+ SCM newsock;
+ int addr_size = MAX_ADDR_SIZE;
+ char max_addr[MAX_ADDR_SIZE];
+ struct sockaddr *addr = (struct sockaddr *) max_addr;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ newfd = accept (fd, addr, &addr_size);
+ if (newfd == -1)
+ SCM_SYSERROR;
+ newsock = SCM_SOCK_FD_TO_PORT (newfd);
+ address = scm_addr_vector (addr, addr_size, FUNC_NAME);
+ return scm_cons (newsock, address);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_getsockname, "getsockname", 1, 0, 0,
+ (SCM sock),
+ "Return the address of @var{sock}, in the same form as the\n"
+ "object returned by @code{accept}. On many systems the address\n"
+ "of a socket in the @code{AF_FILE} namespace cannot be read.")
+#define FUNC_NAME s_scm_getsockname
+{
+ int fd;
+ int addr_size = MAX_ADDR_SIZE;
+ char max_addr[MAX_ADDR_SIZE];
+ struct sockaddr *addr = (struct sockaddr *) max_addr;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (getsockname (fd, addr, &addr_size) == -1)
+ SCM_SYSERROR;
+ return scm_addr_vector (addr, addr_size, FUNC_NAME);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_getpeername, "getpeername", 1, 0, 0,
+ (SCM sock),
+ "Return the address that @var{sock}\n"
+ "is connected to, in the same form as the object returned by\n"
+ "@code{accept}. On many systems the address of a socket in the\n"
+ "@code{AF_FILE} namespace cannot be read.")
+#define FUNC_NAME s_scm_getpeername
+{
+ int fd;
+ int addr_size = MAX_ADDR_SIZE;
+ char max_addr[MAX_ADDR_SIZE];
+ struct sockaddr *addr = (struct sockaddr *) max_addr;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+ if (getpeername (fd, addr, &addr_size) == -1)
+ SCM_SYSERROR;
+ return scm_addr_vector (addr, addr_size, FUNC_NAME);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_recv, "recv!", 2, 1, 0,
+ (SCM sock, SCM buf, SCM flags),
+ "Receive data from a socket port.\n"
+ "@var{sock} must already\n"
+ "be bound to the address from which data is to be received.\n"
+ "@var{buf} is a string into which\n"
+ "the data will be written. The size of @var{buf} limits\n"
+ "the amount of\n"
+ "data which can be received: in the case of packet\n"
+ "protocols, if a packet larger than this limit is encountered\n"
+ "then some data\n"
+ "will be irrevocably lost.\n\n"
+ "The optional @var{flags} argument is a value or\n"
+ "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
+ "The value returned is the number of bytes read from the\n"
+ "socket.\n\n"
+ "Note that the data is read directly from the socket file\n"
+ "descriptor:\n"
+ "any unread buffered port data is ignored.")
+#define FUNC_NAME s_scm_recv
+{
+ int rv;
+ int fd;
+ int flg;
+ char *dest;
+ size_t len;
+
+ SCM_VALIDATE_OPFPORT (1, sock);
+ SCM_VALIDATE_STRING (2, buf);
+ if (SCM_UNBNDP (flags))
+ flg = 0;
+ else
+ flg = scm_to_int (flags);
+ fd = SCM_FPORT_FDES (sock);
+
+ len = scm_i_string_length (buf);
+ dest = scm_i_string_writable_chars (buf);
+ SCM_SYSCALL (rv = recv (fd, dest, len, flg));
+ scm_i_string_stop_writing ();
+
+ if (rv == -1)
+ SCM_SYSERROR;
+
+ scm_remember_upto_here_1 (buf);
+ return scm_from_int (rv);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_send, "send", 2, 1, 0,
+ (SCM sock, SCM message, SCM flags),
+ "Transmit the string @var{message} on a socket port @var{sock}.\n"
+ "@var{sock} must already be bound to a destination address. The\n"
+ "value returned is the number of bytes transmitted --\n"
+ "it's possible for\n"
+ "this to be less than the length of @var{message}\n"
+ "if the socket is\n"
+ "set to be non-blocking. The optional @var{flags} argument\n"
+ "is a value or\n"
+ "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
+ "Note that the data is written directly to the socket\n"
+ "file descriptor:\n"
+ "any unflushed buffered port data is ignored.")
+#define FUNC_NAME s_scm_send
+{
+ int rv;
+ int fd;
+ int flg;
+ const char *src;
+ size_t len;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_OPFPORT (1, sock);
+ SCM_VALIDATE_STRING (2, message);
+ if (SCM_UNBNDP (flags))
+ flg = 0;
+ else
+ flg = scm_to_int (flags);
+ fd = SCM_FPORT_FDES (sock);
+
+ len = scm_i_string_length (message);
+ src = scm_i_string_writable_chars (message);
+ SCM_SYSCALL (rv = send (fd, src, len, flg));
+ scm_i_string_stop_writing ();
+
+ if (rv == -1)
+ SCM_SYSERROR;
+
+ scm_remember_upto_here_1 (message);
+ return scm_from_int (rv);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_recvfrom, "recvfrom!", 2, 3, 0,
+ (SCM sock, SCM str, SCM flags, SCM start, SCM end),
+ "Return data from the socket port @var{sock} and also\n"
+ "information about where the data was received from.\n"
+ "@var{sock} must already be bound to the address from which\n"
+ "data is to be received. @code{str}, is a string into which the\n"
+ "data will be written. The size of @var{str} limits the amount\n"
+ "of data which can be received: in the case of packet protocols,\n"
+ "if a packet larger than this limit is encountered then some\n"
+ "data will be irrevocably lost.\n\n"
+ "The optional @var{flags} argument is a value or bitwise OR of\n"
+ "@code{MSG_OOB}, @code{MSG_PEEK}, @code{MSG_DONTROUTE} etc.\n\n"
+ "The value returned is a pair: the @emph{car} is the number of\n"
+ "bytes read from the socket and the @emph{cdr} an address object\n"
+ "in the same form as returned by @code{accept}. The address\n"
+ "will given as @code{#f} if not available, as is usually the\n"
+ "case for stream sockets.\n\n"
+ "The @var{start} and @var{end} arguments specify a substring of\n"
+ "@var{str} to which the data should be written.\n\n"
+ "Note that the data is read directly from the socket file\n"
+ "descriptor: any unread buffered port data is ignored.")
+#define FUNC_NAME s_scm_recvfrom
+{
+ int rv;
+ int fd;
+ int flg;
+ char *buf;
+ size_t offset;
+ size_t cend;
+ SCM address;
+ int addr_size = MAX_ADDR_SIZE;
+ char max_addr[MAX_ADDR_SIZE];
+ struct sockaddr *addr = (struct sockaddr *) max_addr;
+
+ SCM_VALIDATE_OPFPORT (1, sock);
+ fd = SCM_FPORT_FDES (sock);
+
+ SCM_VALIDATE_STRING (2, str);
+ scm_i_get_substring_spec (scm_i_string_length (str),
+ start, &offset, end, &cend);
+
+ if (SCM_UNBNDP (flags))
+ flg = 0;
+ else
+ SCM_VALIDATE_ULONG_COPY (3, flags, flg);
+
+ /* recvfrom will not necessarily return an address. usually nothing
+ is returned for stream sockets. */
+ buf = scm_i_string_writable_chars (str);
+ addr->sa_family = AF_UNSPEC;
+ SCM_SYSCALL (rv = recvfrom (fd, buf + offset,
+ cend - offset, flg,
+ addr, &addr_size));
+ scm_i_string_stop_writing ();
+
+ if (rv == -1)
+ SCM_SYSERROR;
+ if (addr->sa_family != AF_UNSPEC)
+ address = scm_addr_vector (addr, addr_size, FUNC_NAME);
+ else
+ address = SCM_BOOL_F;
+
+ scm_remember_upto_here_1 (str);
+ return scm_cons (scm_from_int (rv), address);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_sendto, "sendto", 4, 0, 1,
+ (SCM sock, SCM message, SCM fam, SCM address, SCM args_and_flags),
+ "Transmit the string @var{message} on the socket port\n"
+ "@var{sock}. The\n"
+ "destination address is specified using the @var{fam},\n"
+ "@var{address} and\n"
+ "@var{args_and_flags} arguments, in a similar way to the\n"
+ "@code{connect} procedure. @var{args_and_flags} contains\n"
+ "the usual connection arguments optionally followed by\n"
+ "a flags argument, which is a value or\n"
+ "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n"
+ "The value returned is the number of bytes transmitted --\n"
+ "it's possible for\n"
+ "this to be less than the length of @var{message} if the\n"
+ "socket is\n"
+ "set to be non-blocking.\n"
+ "Note that the data is written directly to the socket\n"
+ "file descriptor:\n"
+ "any unflushed buffered port data is ignored.")
+#define FUNC_NAME s_scm_sendto
+{
+ int rv;
+ int fd;
+ int flg;
+ struct sockaddr *soka;
+ int size;
+
+ sock = SCM_COERCE_OUTPORT (sock);
+ SCM_VALIDATE_FPORT (1, sock);
+ SCM_VALIDATE_STRING (2, message);
+ fd = SCM_FPORT_FDES (sock);
+ soka = scm_fill_sockaddr (scm_to_int (fam), address, &args_and_flags, 4,
+ FUNC_NAME, &size);
+ if (scm_is_null (args_and_flags))
+ flg = 0;
+ else
+ {
+ SCM_VALIDATE_CONS (5, args_and_flags);
+ flg = SCM_NUM2ULONG (5, SCM_CAR (args_and_flags));
+ }
+ SCM_SYSCALL (rv = sendto (fd,
+ scm_i_string_chars (message),
+ scm_i_string_length (message),
+ flg, soka, size));
+ if (rv == -1)
+ {
+ int save_errno = errno;
+ free (soka);
+ errno = save_errno;
+ SCM_SYSERROR;
+ }
+ free (soka);
+
+ scm_remember_upto_here_1 (message);
+ return scm_from_int (rv);
+}
+#undef FUNC_NAME
+\f
+
+
+void
+scm_init_socket ()
+{
+ /* protocol families. */
+#ifdef AF_UNSPEC
+ scm_c_define ("AF_UNSPEC", scm_from_int (AF_UNSPEC));
+#endif
+#ifdef AF_UNIX
+ scm_c_define ("AF_UNIX", scm_from_int (AF_UNIX));
+#endif
+#ifdef AF_INET
+ scm_c_define ("AF_INET", scm_from_int (AF_INET));
+#endif
+#ifdef AF_INET6
+ scm_c_define ("AF_INET6", scm_from_int (AF_INET6));
+#endif
+
+#ifdef PF_UNSPEC
+ scm_c_define ("PF_UNSPEC", scm_from_int (PF_UNSPEC));
+#endif
+#ifdef PF_UNIX
+ scm_c_define ("PF_UNIX", scm_from_int (PF_UNIX));
+#endif
+#ifdef PF_INET
+ scm_c_define ("PF_INET", scm_from_int (PF_INET));
+#endif
+#ifdef PF_INET6
+ scm_c_define ("PF_INET6", scm_from_int (PF_INET6));
+#endif
+
+ /* standard addresses. */
+#ifdef INADDR_ANY
+ scm_c_define ("INADDR_ANY", scm_from_ulong (INADDR_ANY));
+#endif
+#ifdef INADDR_BROADCAST
+ scm_c_define ("INADDR_BROADCAST", scm_from_ulong (INADDR_BROADCAST));
+#endif
+#ifdef INADDR_NONE
+ scm_c_define ("INADDR_NONE", scm_from_ulong (INADDR_NONE));
+#endif
+#ifdef INADDR_LOOPBACK
+ scm_c_define ("INADDR_LOOPBACK", scm_from_ulong (INADDR_LOOPBACK));
+#endif
+
+ /* socket types.
+
+ SOCK_PACKET is deliberately omitted, the GNU/Linux socket(2) and
+ packet(7) advise that it's obsolete and strongly deprecated. */
+
+#ifdef SOCK_STREAM
+ scm_c_define ("SOCK_STREAM", scm_from_int (SOCK_STREAM));
+#endif
+#ifdef SOCK_DGRAM
+ scm_c_define ("SOCK_DGRAM", scm_from_int (SOCK_DGRAM));
+#endif
+#ifdef SOCK_SEQPACKET
+ scm_c_define ("SOCK_SEQPACKET", scm_from_int (SOCK_SEQPACKET));
+#endif
+#ifdef SOCK_RAW
+ scm_c_define ("SOCK_RAW", scm_from_int (SOCK_RAW));
+#endif
+#ifdef SOCK_RDM
+ scm_c_define ("SOCK_RDM", scm_from_int (SOCK_RDM));
+#endif
+
+ /* setsockopt level. */
+#ifdef SOL_SOCKET
+ scm_c_define ("SOL_SOCKET", scm_from_int (SOL_SOCKET));
+#endif
+#ifdef SOL_IP
+ scm_c_define ("SOL_IP", scm_from_int (SOL_IP));
+#endif
+#ifdef SOL_TCP
+ scm_c_define ("SOL_TCP", scm_from_int (SOL_TCP));
+#endif
+#ifdef SOL_UDP
+ scm_c_define ("SOL_UDP", scm_from_int (SOL_UDP));
+#endif
+
+ /* setsockopt names. */
+#ifdef SO_DEBUG
+ scm_c_define ("SO_DEBUG", scm_from_int (SO_DEBUG));
+#endif
+#ifdef SO_REUSEADDR
+ scm_c_define ("SO_REUSEADDR", scm_from_int (SO_REUSEADDR));
+#endif
+#ifdef SO_STYLE
+ scm_c_define ("SO_STYLE", scm_from_int (SO_STYLE));
+#endif
+#ifdef SO_TYPE
+ scm_c_define ("SO_TYPE", scm_from_int (SO_TYPE));
+#endif
+#ifdef SO_ERROR
+ scm_c_define ("SO_ERROR", scm_from_int (SO_ERROR));
+#endif
+#ifdef SO_DONTROUTE
+ scm_c_define ("SO_DONTROUTE", scm_from_int (SO_DONTROUTE));
+#endif
+#ifdef SO_BROADCAST
+ scm_c_define ("SO_BROADCAST", scm_from_int (SO_BROADCAST));
+#endif
+#ifdef SO_SNDBUF
+ scm_c_define ("SO_SNDBUF", scm_from_int (SO_SNDBUF));
+#endif
+#ifdef SO_RCVBUF
+ scm_c_define ("SO_RCVBUF", scm_from_int (SO_RCVBUF));
+#endif
+#ifdef SO_KEEPALIVE
+ scm_c_define ("SO_KEEPALIVE", scm_from_int (SO_KEEPALIVE));
+#endif
+#ifdef SO_OOBINLINE
+ scm_c_define ("SO_OOBINLINE", scm_from_int (SO_OOBINLINE));
+#endif
+#ifdef SO_NO_CHECK
+ scm_c_define ("SO_NO_CHECK", scm_from_int (SO_NO_CHECK));
+#endif
+#ifdef SO_PRIORITY
+ scm_c_define ("SO_PRIORITY", scm_from_int (SO_PRIORITY));
+#endif
+#ifdef SO_LINGER
+ scm_c_define ("SO_LINGER", scm_from_int (SO_LINGER));
+#endif
+
+ /* recv/send options. */
+#ifdef MSG_OOB
+ scm_c_define ("MSG_OOB", scm_from_int (MSG_OOB));
+#endif
+#ifdef MSG_PEEK
+ scm_c_define ("MSG_PEEK", scm_from_int (MSG_PEEK));
+#endif
+#ifdef MSG_DONTROUTE
+ scm_c_define ("MSG_DONTROUTE", scm_from_int (MSG_DONTROUTE));
+#endif
+
+#ifdef __MINGW32__
+ scm_i_init_socket_Win32 ();
+#endif
+
+#ifdef IP_ADD_MEMBERSHIP
+ scm_c_define ("IP_ADD_MEMBERSHIP", scm_from_int (IP_ADD_MEMBERSHIP));
+ scm_c_define ("IP_DROP_MEMBERSHIP", scm_from_int (IP_DROP_MEMBERSHIP));
+#endif
+
+ scm_add_feature ("socket");
+
+#include "libguile/socket.x"
+}
+
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff