X-Git-Url: https://git.hcoop.net/bpt/guile.git/blobdiff_plain/783e77747821c3b79d5ea47fa6be4beb1a758253..8912421cf3829a4fd65877fd1255125c191f6f89:/libguile/socket.c diff --git a/libguile/socket.c b/libguile/socket.c dissimilarity index 62% index 52e0fff57..4f4d392e2 100644 --- a/libguile/socket.c +++ b/libguile/socket.c @@ -1,998 +1,1825 @@ -/* Copyright (C) 1996,1997,1998, 2000 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 */ - - - -#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/validate.h" -#include "libguile/socket.h" - -#ifdef HAVE_STRING_H -#include -#endif -#ifdef HAVE_UNISTD_H -#include -#endif -#include -#include -#ifdef HAVE_UNIX_DOMAIN_SOCKETS -#include -#endif -#include -#include -#include - -/* we are not currently using socklen_t. it's not defined on all systems, - so would need to be checked by configure. in the meantime, plain - int is the best alternative. */ - - - -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"); - -#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), - "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_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)); - 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), - "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_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; - - 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), - "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; - /* 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 (scm_sizet)]; - int optlen = sizeof (scm_sizet); -#endif - int ilevel; - int 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 (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_long2num (ling->l_onoff), - scm_long2num (ling->l_linger)); -#else - return scm_cons (scm_long2num (*(int *) optval) - SCM_MAKINUM (0)); -#endif - } - else -#endif - if (0 -#ifdef SO_SNDBUF - || ioptname == SO_SNDBUF -#endif -#ifdef SO_RCVBUF - || ioptname == SO_RCVBUF -#endif - ) - { - return scm_long2num (*(scm_sizet *) optval); - } - } - return scm_long2num (*(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 = -1; - /* size of optval is the largest supported option. */ -#ifdef HAVE_STRUCT_LINGER - char optval[sizeof (struct linger)]; -#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 (ilevel == SOL_SOCKET) - { -#ifdef SO_LINGER - if (ioptname == SO_LINGER) - { -#ifdef HAVE_STRUCT_LINGER - struct linger ling; - long lv; - - SCM_ASSERT (SCM_CONSP (value), value, SCM_ARG4, FUNC_NAME); - lv = SCM_NUM2LONG (4, SCM_CAR (value)); - ling.l_onoff = (int) lv; - SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_onoff == lv); - lv = SCM_NUM2LONG (4, SCM_CDR (value)); - ling.l_linger = (int) lv; - SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_linger == lv); - optlen = (int) sizeof (struct linger); - memcpy (optval, (void *) &ling, optlen); -#else - int ling; - long lv; - - SCM_ASSERT (SCM_CONSP (value), value, SCM_ARG4, FUNC_NAME); - /* timeout is ignored, but may as well validate it. */ - lv = SCM_NUM2LONG (4, SCM_CDR (value)); - ling = (int) lv; - SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv); - lv = SCM_NUM2LONG (4, SCM_CAR (value)); - ling = (int) lv; - SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv); - optlen = (int) sizeof (int); - (*(int *) optval) = ling; -#endif - } - else -#endif - if (0 -#ifdef SO_SNDBUF - || ioptname == SO_SNDBUF -#endif -#ifdef SO_RCVBUF - || ioptname == SO_RCVBUF -#endif - ) - { - long lv = SCM_NUM2LONG (4, value); - - optlen = (int) sizeof (scm_sizet); - (*(scm_sizet *) optval) = (scm_sizet) lv; - } - } - if (optlen == -1) - { - /* Most options take an int. */ - long lv = SCM_NUM2LONG (4, value); - int val = (int) lv; - - SCM_ASSERT_RANGE (SCM_ARG4, value, val == lv); - optlen = (int) sizeof (int); - (*(int *) optval) = val; - } - 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, int *size) -{ - switch (fam) - { - case AF_INET: - { - SCM isport; - struct sockaddr_in *soka; - - SCM_ASSERT (SCM_CONSP (*args), *args, - which_arg + 1, proc); - isport = SCM_CAR (*args); - SCM_ASSERT (SCM_INUMP (isport), isport, which_arg + 1, proc); - soka = (struct sockaddr_in *) malloc (sizeof (struct sockaddr_in)); - if (!soka) - scm_memory_error (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)); - *args = SCM_CDR (*args); - 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; - int addr_size; - - SCM_ASSERT (SCM_STRINGP (address), address, which_arg, proc); - /* 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, SCM_STRING_LENGTH (address) + 1 - (sizeof soka->sun_path)); - soka = (struct sockaddr_un *) malloc (addr_size); - if (!soka) - scm_memory_error (proc); - memset (soka, 0, addr_size); /* for sun_len: see sin_len above. */ - soka->sun_family = AF_UNIX; - memcpy (soka->sun_path, SCM_STRING_CHARS (address), - SCM_STRING_LENGTH (address)); - *size = SUN_LEN (soka); - 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; - int 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) - { - 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), - "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 -{ - struct sockaddr *soka; - int 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); - 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), - "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_c_make_vector (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_c_make_vector (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; -} - -/* 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 - -#define MAX_ADDR_SIZE max (sizeof (struct sockaddr_in), MAX_SIZE_UN) - -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 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); - if (addr_size > 0) - address = scm_addr_vector (addr, 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 fd; - SCM result; - 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; - if (addr_size > 0) - result = scm_addr_vector (addr, 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 fd; - SCM result; - 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; - if (addr_size > 0) - result = scm_addr_vector (addr, 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:\n" - "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_STRING_CHARS (buf), SCM_STRING_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_STRING (2, message); - SCM_VALIDATE_INUM_DEF_COPY (3,flags,0,flg); - fd = SCM_FPORT_FDES (sock); - - SCM_SYSCALL (rv = send (fd, SCM_STRING_CHARS (message), SCM_STRING_LENGTH (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 str, 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{str}, is a string into which\n" - "the data will be written. The size of @var{str} 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{str}\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; - char *buf; - int offset; - int 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_SUBSTRING_SPEC_COPY (2, str, buf, 4, start, offset, - 5, end, cend); - if (SCM_UNBNDP (flags)) - flg = 0; - else - SCM_VALIDATE_ULONG_COPY (3, flags, flg); - - /* recvfrom will not necessarily return an address. e.g., linux - 2.4.2 doesn't change addr or addr_size if socket is - AF_INET/SOCK_STREAM. */ - addr->sa_family = AF_UNSPEC; - SCM_SYSCALL (rv = recvfrom (fd, buf + offset, - cend - offset, flg, - addr, &addr_size)); - if (rv == -1) - SCM_SYSERROR; - if (addr_size > 0 && addr->sa_family != AF_UNSPEC) - address = scm_addr_vector (addr, 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; - int size; - - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_FPORT (1,sock); - SCM_VALIDATE_STRING (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_STRING_CHARS (message), - SCM_STRING_LENGTH (message), - flg, soka, size)); - if (rv == -1) - { - int save_errno = errno; - free (soka); - errno = save_errno; - SCM_SYSERROR; - } - free (soka); - return SCM_MAKINUM (rv); -} -#undef FUNC_NAME - - - -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"); - -#ifndef SCM_MAGIC_SNARFER -#include "libguile/socket.x" -#endif -} - - -/* - Local Variables: - c-file-style: "gnu" - End: -*/ +/* Copyright (C) 1996,1997,1998,2000,2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 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 3 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 + */ + + + + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include + +#include "libguile/_scm.h" +#include "libguile/arrays.h" +#include "libguile/feature.h" +#include "libguile/fports.h" +#include "libguile/strings.h" +#include "libguile/vectors.h" +#include "libguile/dynwind.h" +#include "libguile/srfi-13.h" + +#include "libguile/validate.h" +#include "libguile/socket.h" + +#include "libguile/iselect.h" + +#ifdef __MINGW32__ +#include "win32-socket.h" +#endif + +#ifdef HAVE_STDINT_H +#include +#endif +#ifdef HAVE_STRING_H +#include +#endif +#ifdef HAVE_UNISTD_H +#include +#endif +#include +#ifdef HAVE_WINSOCK2_H +#include +#else +#include +#ifdef HAVE_UNIX_DOMAIN_SOCKETS +#include +#endif +#include +#include +#include +#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 + +/* The largest possible socket address. Wrapping it in a union guarantees + that the compiler will make it suitably aligned. */ +typedef union +{ + struct sockaddr sockaddr; + struct sockaddr_in sockaddr_in; + +#ifdef HAVE_UNIX_DOMAIN_SOCKETS + struct sockaddr_un sockaddr_un; +#endif +#ifdef HAVE_IPV6 + struct sockaddr_in6 sockaddr_in6; +#endif +} scm_t_max_sockaddr; + + +/* Maximum size of a socket address. */ +#define MAX_ADDR_SIZE (sizeof (scm_t_max_sockaddr)) + + + + +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 +{ + return scm_from_ulong (htonl (scm_to_uint32 (value))); +} +#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 +{ + return scm_from_ulong (ntohl (scm_to_uint32 (value))); +} +#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_msg ("scm_to_ipv6", 0, src, "integer"); +} + +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; + scm_t_uint32 dst[4]; + 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 (*dst)); + else + return scm_from_ipv6 ((scm_t_uint8 *) dst); +} +#undef FUNC_NAME + +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))\n" + " @result{} \"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 + const char *result; + + af = scm_to_int (family); + SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6); + if (af == AF_INET) + { + scm_t_uint32 addr4; + + addr4 = htonl (SCM_NUM2ULONG (2, address)); + result = inet_ntop (af, &addr4, dst, sizeof (dst)); + } + else + { + char addr6[16]; + + scm_to_ipv6 ((scm_t_uint8 *) addr6, address); + result = inet_ntop (af, &addr6, dst, sizeof (dst)); + } + + if (result == NULL) + SCM_SYSERROR; + + return scm_from_locale_string (dst); +} +#undef FUNC_NAME + +#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 + +/* Possible results for `getsockopt ()'. Wrapping it into a union guarantees + suitable alignment. */ +typedef union +{ +#ifdef HAVE_STRUCT_LINGER + struct linger linger; +#endif + size_t size; + int integer; +} scm_t_getsockopt_result; + +SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0, + (SCM sock, SCM level, SCM optname), + "Return an option value from socket port @var{sock}.\n" + "\n" + "@var{level} is an integer specifying a protocol layer, either\n" + "@code{SOL_SOCKET} for socket level options, or a protocol\n" + "number from the @code{IPPROTO} constants or @code{getprotoent}\n" + "(@pxref{Network Databases}).\n" + "\n" + "@defvar SOL_SOCKET\n" + "@defvarx IPPROTO_IP\n" + "@defvarx IPPROTO_TCP\n" + "@defvarx IPPROTO_UDP\n" + "@end defvar\n" + "\n" + "@var{optname} is an integer specifying an option within the\n" + "protocol layer.\n" + "\n" + "For @code{SOL_SOCKET} level the following @var{optname}s are\n" + "defined (when provided by the system). For their meaning see\n" + "@ref{Socket-Level Options,,, libc, The GNU C Library Reference\n" + "Manual}, or @command{man 7 socket}.\n" + "\n" + "@defvar SO_DEBUG\n" + "@defvarx SO_REUSEADDR\n" + "@defvarx SO_STYLE\n" + "@defvarx SO_TYPE\n" + "@defvarx SO_ERROR\n" + "@defvarx SO_DONTROUTE\n" + "@defvarx SO_BROADCAST\n" + "@defvarx SO_SNDBUF\n" + "@defvarx SO_RCVBUF\n" + "@defvarx SO_KEEPALIVE\n" + "@defvarx SO_OOBINLINE\n" + "@defvarx SO_NO_CHECK\n" + "@defvarx SO_PRIORITY\n" + "The value returned is an integer.\n" + "@end defvar\n" + "\n" + "@defvar SO_LINGER\n" + "The @var{value} returned is a pair of integers\n" + "@code{(@var{ENABLE} . @var{TIMEOUT})}. On old systems without\n" + "timeout support (ie.@: without @code{struct linger}), only\n" + "@var{ENABLE} has an effect but the value in Guile is always a\n" + "pair.\n" + "@end defvar") +#define FUNC_NAME s_scm_getsockopt +{ + int fd; + /* size of optval is the largest supported option. */ + scm_t_getsockopt_result optval; + socklen_t optlen = sizeof (optval); + 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 an option on socket port @var{sock}. The return value is\n" + "unspecified.\n" + "\n" + "@var{level} is an integer specifying a protocol layer, either\n" + "@code{SOL_SOCKET} for socket level options, or a protocol\n" + "number from the @code{IPPROTO} constants or @code{getprotoent}\n" + "(@pxref{Network Databases}).\n" + "\n" + "@defvar SOL_SOCKET\n" + "@defvarx IPPROTO_IP\n" + "@defvarx IPPROTO_TCP\n" + "@defvarx IPPROTO_UDP\n" + "@end defvar\n" + "\n" + "@var{optname} is an integer specifying an option within the\n" + "protocol layer.\n" + "\n" + "For @code{SOL_SOCKET} level the following @var{optname}s are\n" + "defined (when provided by the system). For their meaning see\n" + "@ref{Socket-Level Options,,, libc, The GNU C Library Reference\n" + "Manual}, or @command{man 7 socket}.\n" + "\n" + "@defvar SO_DEBUG\n" + "@defvarx SO_REUSEADDR\n" + "@defvarx SO_STYLE\n" + "@defvarx SO_TYPE\n" + "@defvarx SO_ERROR\n" + "@defvarx SO_DONTROUTE\n" + "@defvarx SO_BROADCAST\n" + "@defvarx SO_SNDBUF\n" + "@defvarx SO_RCVBUF\n" + "@defvarx SO_KEEPALIVE\n" + "@defvarx SO_OOBINLINE\n" + "@defvarx SO_NO_CHECK\n" + "@defvarx SO_PRIORITY\n" + "@var{value} is an integer.\n" + "@end defvar\n" + "\n" + "@defvar SO_LINGER\n" + "@var{value} is a pair of integers @code{(@var{ENABLE}\n" + ". @var{TIMEOUT})}. On old systems without timeout support\n" + "(ie.@: without @code{struct linger}), only @var{ENABLE} has an\n" + "effect but the value in Guile is always a pair.\n" + "@end defvar\n" + "\n" + "@c Note that we refer only to ``man ip'' here. On GNU/Linux it's\n" + "@c ``man 7 ip'' but on NetBSD it's ``man 4 ip''.\n" + "@c \n" + "For IP level (@code{IPPROTO_IP}) the following @var{optname}s\n" + "are defined (when provided by the system). See @command{man\n" + "ip} for what they mean.\n" + "\n" + "@defvar IP_ADD_MEMBERSHIP\n" + "@defvarx IP_DROP_MEMBERSHIP\n" + "These can be used only with @code{setsockopt}, not\n" + "@code{getsockopt}. @var{value} is a pair\n" + "@code{(@var{MULTIADDR} . @var{INTERFACEADDR})} of IPv4\n" + "addresses (@pxref{Network Address Conversion}).\n" + "@var{MULTIADDR} is a multicast address to be added to or\n" + "dropped from the interface @var{INTERFACEADDR}.\n" + "@var{INTERFACEADDR} can be @code{INADDR_ANY} to have the system\n" + "select the interface. @var{INTERFACEADDR} can also be an\n" + "interface index number, on systems supporting that.\n" + "@end defvar") +#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, size_t *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 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 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_dynwind_begin (0); + + c_address = scm_to_locale_string (address); + scm_dynwind_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_dynwind_end (); + return (struct sockaddr *) soka; + } +#endif + default: + scm_out_of_range (proc, scm_from_int (fam)); + } +} +#undef FUNC_NAME + +SCM_DEFINE (scm_connect, "connect", 2, 1, 1, + (SCM sock, SCM fam_or_sockaddr, 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" + "Alternatively, the second argument can be a socket address object " + "as returned by @code{make-socket-address}, in which case the " + "no additional arguments should be passed.\n\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_connect +{ + int fd; + struct sockaddr *soka; + size_t size; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + fd = SCM_FPORT_FDES (sock); + + if (address == SCM_UNDEFINED) + /* No third argument was passed to FAM_OR_SOCKADDR must actually be a + `socket address' object. */ + soka = scm_to_sockaddr (fam_or_sockaddr, &size); + else + soka = scm_fill_sockaddr (scm_to_int (fam_or_sockaddr), 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", 2, 1, 1, + (SCM sock, SCM fam_or_sockaddr, 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" + "Alternatively, the second argument can be a socket address object " + "as returned by @code{make-socket-address}, in which case the " + "no additional arguments should be passed.\n\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_bind +{ + struct sockaddr *soka; + size_t size; + int fd; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + fd = SCM_FPORT_FDES (sock); + + if (address == SCM_UNDEFINED) + /* No third argument was passed to FAM_OR_SOCKADDR must actually be a + `socket address' object. */ + soka = scm_to_sockaddr (fam_or_sockaddr, &size); + else + soka = scm_fill_sockaddr (scm_to_int (fam_or_sockaddr), address, + &args, 3, FUNC_NAME, &size); + + + 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_C_INLINE_KEYWORD SCM +_scm_from_sockaddr (const scm_t_max_sockaddr *address, unsigned addr_size, + const char *proc) +{ + SCM result = SCM_EOL; + short int fam = ((struct sockaddr *) address)->sa_family; + + 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: + result = SCM_UNSPECIFIED; + scm_misc_error (proc, "unrecognised address family: ~A", + scm_list_1 (scm_from_int (fam))); + + } + return result; +} + +/* The publicly-visible function. Return a Scheme object representing + ADDRESS, an address of ADDR_SIZE bytes. */ +SCM +scm_from_sockaddr (const struct sockaddr *address, unsigned addr_size) +{ + return (_scm_from_sockaddr ((scm_t_max_sockaddr *) address, + addr_size, "scm_from_sockaddr")); +} + +/* Convert ADDRESS, an address object returned by either + `scm_from_sockaddr ()' or `scm_make_socket_address ()', into its C + representation. On success, a non-NULL pointer is returned and + ADDRESS_SIZE is updated to the actual size (in bytes) of the returned + address. The result must eventually be freed using `free ()'. */ +struct sockaddr * +scm_to_sockaddr (SCM address, size_t *address_size) +#define FUNC_NAME "scm_to_sockaddr" +{ + short int family; + struct sockaddr *c_address = NULL; + + SCM_VALIDATE_VECTOR (1, address); + + *address_size = 0; + family = scm_to_short (SCM_SIMPLE_VECTOR_REF (address, 0)); + + switch (family) + { + case AF_INET: + { + if (SCM_SIMPLE_VECTOR_LENGTH (address) != 3) + scm_misc_error (FUNC_NAME, + "invalid inet address representation: ~A", + scm_list_1 (address)); + else + { + struct sockaddr_in c_inet; + + c_inet.sin_addr.s_addr = + htonl (scm_to_ulong (SCM_SIMPLE_VECTOR_REF (address, 1))); + c_inet.sin_port = + htons (scm_to_ushort (SCM_SIMPLE_VECTOR_REF (address, 2))); + c_inet.sin_family = AF_INET; + + *address_size = sizeof (c_inet); + c_address = scm_malloc (sizeof (c_inet)); + memcpy (c_address, &c_inet, sizeof (c_inet)); + } + + break; + } + +#ifdef HAVE_IPV6 + case AF_INET6: + { + if (SCM_SIMPLE_VECTOR_LENGTH (address) != 5) + scm_misc_error (FUNC_NAME, "invalid inet6 address representation: ~A", + scm_list_1 (address)); + else + { + struct sockaddr_in6 c_inet6; + + scm_to_ipv6 (c_inet6.sin6_addr.s6_addr, + SCM_SIMPLE_VECTOR_REF (address, 1)); + c_inet6.sin6_port = + htons (scm_to_ushort (SCM_SIMPLE_VECTOR_REF (address, 2))); + c_inet6.sin6_flowinfo = + scm_to_uint32 (SCM_SIMPLE_VECTOR_REF (address, 3)); +#ifdef HAVE_SIN6_SCOPE_ID + c_inet6.sin6_scope_id = + scm_to_ulong (SCM_SIMPLE_VECTOR_REF (address, 4)); +#endif + + c_inet6.sin6_family = AF_INET6; + + *address_size = sizeof (c_inet6); + c_address = scm_malloc (sizeof (c_inet6)); + memcpy (c_address, &c_inet6, sizeof (c_inet6)); + } + + break; + } +#endif + +#ifdef HAVE_UNIX_DOMAIN_SOCKETS + case AF_UNIX: + { + if (SCM_SIMPLE_VECTOR_LENGTH (address) != 2) + scm_misc_error (FUNC_NAME, "invalid unix address representation: ~A", + scm_list_1 (address)); + else + { + SCM path; + size_t path_len = 0; + + path = SCM_SIMPLE_VECTOR_REF (address, 1); + if ((!scm_is_string (path)) && (path != SCM_BOOL_F)) + scm_misc_error (FUNC_NAME, "invalid unix address " + "path: ~A", scm_list_1 (path)); + else + { + struct sockaddr_un c_unix; + + if (path == SCM_BOOL_F) + path_len = 0; + else + path_len = scm_c_string_length (path); + +#ifdef UNIX_PATH_MAX + if (path_len >= UNIX_PATH_MAX) +#else +/* We can hope that this limit will eventually vanish, at least on GNU. + However, currently, while glibc doesn't define `UNIX_PATH_MAX', it + documents it has being limited to 108 bytes. */ + if (path_len >= sizeof (c_unix.sun_path)) +#endif + scm_misc_error (FUNC_NAME, "unix address path " + "too long: ~A", scm_list_1 (path)); + else + { + if (path_len) + { + scm_to_locale_stringbuf (path, c_unix.sun_path, +#ifdef UNIX_PATH_MAX + UNIX_PATH_MAX); +#else + sizeof (c_unix.sun_path)); +#endif + c_unix.sun_path[path_len] = '\0'; + + /* Sanity check. */ + if (strlen (c_unix.sun_path) != path_len) + scm_misc_error (FUNC_NAME, "unix address path " + "contains nul characters: ~A", + scm_list_1 (path)); + } + else + c_unix.sun_path[0] = '\0'; + + c_unix.sun_family = AF_UNIX; + + *address_size = SUN_LEN (&c_unix); + c_address = scm_malloc (sizeof (c_unix)); + memcpy (c_address, &c_unix, sizeof (c_unix)); + } + } + } + + break; + } +#endif + + default: + scm_misc_error (FUNC_NAME, "unrecognised address family: ~A", + scm_list_1 (scm_from_ushort (family))); + } + + return c_address; +} +#undef FUNC_NAME + + +/* Return a newly-allocated `sockaddr' structure that reflects ADDRESS, being + an address of family FAMILY, with the family-specific parameters ARGS (see + the description of `connect' for details). The returned structure may be + freed using `free ()'. */ +struct sockaddr * +scm_c_make_socket_address (SCM family, SCM address, SCM args, + size_t *address_size) +{ + struct sockaddr *soka; + + soka = scm_fill_sockaddr (scm_to_ushort (family), address, &args, 1, + "scm_c_make_socket_address", address_size); + + return soka; +} + +SCM_DEFINE (scm_make_socket_address, "make-socket-address", 2, 0, 1, + (SCM family, SCM address, SCM args), + "Return a Scheme address object that reflects @var{address}, " + "being an address of family @var{family}, with the " + "family-specific parameters @var{args} (see the description of " + "@code{connect} for details).") +#define FUNC_NAME s_scm_make_socket_address +{ + SCM result = SCM_BOOL_F; + struct sockaddr *c_address; + size_t c_address_size; + + c_address = scm_c_make_socket_address (family, address, args, + &c_address_size); + if (c_address != NULL) + { + result = scm_from_sockaddr (c_address, c_address_size); + free (c_address); + } + + return result; +} +#undef FUNC_NAME + + +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, selected; + int newfd; + SCM address; + SCM newsock; + SELECT_TYPE readfds, exceptfds; + socklen_t addr_size = MAX_ADDR_SIZE; + scm_t_max_sockaddr addr; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + fd = SCM_FPORT_FDES (sock); + + FD_ZERO (&readfds); + FD_ZERO (&exceptfds); + FD_SET (fd, &readfds); + FD_SET (fd, &exceptfds); + + /* Block until something happens on FD, leaving guile mode while + waiting. */ + selected = scm_std_select (fd + 1, &readfds, NULL, &exceptfds, + NULL); + if (selected < 0) + SCM_SYSERROR; + + newfd = accept (fd, (struct sockaddr *) &addr, &addr_size); + if (newfd == -1) + SCM_SYSERROR; + newsock = SCM_SOCK_FD_TO_PORT (newfd); + address = _scm_from_sockaddr (&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; + socklen_t addr_size = MAX_ADDR_SIZE; + scm_t_max_sockaddr addr; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + fd = SCM_FPORT_FDES (sock); + if (getsockname (fd, (struct sockaddr *) &addr, &addr_size) == -1) + SCM_SYSERROR; + + return _scm_from_sockaddr (&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; + socklen_t addr_size = MAX_ADDR_SIZE; + scm_t_max_sockaddr addr; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + fd = SCM_FPORT_FDES (sock); + if (getpeername (fd, (struct sockaddr *) &addr, &addr_size) == -1) + SCM_SYSERROR; + + return _scm_from_sockaddr (&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 data is assumed to be binary, and there is no decoding of\n" + "of locale-encoded strings.\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 msg; + + 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); + msg = scm_i_make_string (len, &dest); + SCM_SYSCALL (rv = recv (fd, dest, len, flg)); + scm_string_copy_x (buf, scm_from_int (0), + msg, scm_from_int (0), scm_from_size_t (len)); + + if (rv == -1) + SCM_SYSERROR; + + scm_remember_upto_here_2 (buf, msg); + 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.\n\n" + "This operation is defined only for strings containing codepoints\n" + "zero to 255.") +#define FUNC_NAME s_scm_send +{ + int rv; + int fd; + int flg; + char *src; + size_t len; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + SCM_VALIDATE_STRING (2, message); + + /* If the string is wide, see if it can be coerced into + a narrow string. */ + if (!scm_i_is_narrow_string (message) + || scm_i_try_narrow_string (message)) + SCM_MISC_ERROR ("the message string is not 8-bit: ~s", + scm_list_1 (message)); + + if (SCM_UNBNDP (flags)) + flg = 0; + else + flg = scm_to_int (flags); + fd = SCM_FPORT_FDES (sock); + + len = scm_i_string_length (message); + message = scm_i_string_start_writing (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), + "Receive data from socket port @var{sock} (which must be already\n" + "bound), returning the originating address as well as the data.\n" + "This is usually for use on datagram sockets, but can be used on\n" + "stream-oriented sockets too.\n" + "\n" + "The data received is stored in the given @var{str}, using\n" + "either the whole string or just the region between the optional\n" + "@var{start} and @var{end} positions. The size of @var{str}\n" + "limits the amount of data which can be received. For datagram\n" + "protocols, if a packet larger than this is received then excess\n" + "bytes are irrevocably lost.\n" + "\n" + "The return value is a pair. The @code{car} is the number of\n" + "bytes read. The @code{cdr} is a socket address object which is\n" + "where the data come from, or @code{#f} if the origin is\n" + "unknown.\n" + "\n" + "The optional @var{flags} argument is a or bitwise OR\n" + "(@code{logior}) of @code{MSG_OOB}, @code{MSG_PEEK},\n" + "@code{MSG_DONTROUTE} etc.\n" + "\n" + "Data is read directly from the socket file descriptor, any\n" + "buffered port data is ignored.\n" + "\n" + "On a GNU/Linux system @code{recvfrom!} is not multi-threading,\n" + "all threads stop while a @code{recvfrom!} call is in progress.\n" + "An application may need to use @code{select}, @code{O_NONBLOCK}\n" + "or @code{MSG_DONTWAIT} to avoid this.") +#define FUNC_NAME s_scm_recvfrom +{ + int rv; + int fd; + int flg; + char *buf; + size_t offset; + size_t cend; + SCM address; + socklen_t addr_size = MAX_ADDR_SIZE; + scm_t_max_sockaddr 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. */ + str = scm_i_string_start_writing (str); + buf = scm_i_string_writable_chars (str); + ((struct sockaddr *) &addr)->sa_family = AF_UNSPEC; + SCM_SYSCALL (rv = recvfrom (fd, buf + offset, + cend - offset, flg, + (struct sockaddr *) &addr, &addr_size)); + scm_i_string_stop_writing (); + + if (rv == -1) + SCM_SYSERROR; + if (((struct sockaddr *) &addr)->sa_family != AF_UNSPEC) + address = _scm_from_sockaddr (&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", 3, 1, 1, + (SCM sock, SCM message, SCM fam_or_sockaddr, 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, or just a socket address object " + "returned by @code{make-socket-address}, 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.\n" + "This operation is defined only for strings containing codepoints\n" + "zero to 255.") +#define FUNC_NAME s_scm_sendto +{ + int rv; + int fd; + int flg; + struct sockaddr *soka; + size_t size; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_FPORT (1, sock); + SCM_VALIDATE_STRING (2, message); + fd = SCM_FPORT_FDES (sock); + + if (!scm_is_number (fam_or_sockaddr)) + { + /* FAM_OR_SOCKADDR must actually be a `socket address' object. This + means that the following arguments, i.e. ADDRESS and those listed in + ARGS_AND_FLAGS, are the `MSG_' flags. */ + soka = scm_to_sockaddr (fam_or_sockaddr, &size); + if (address != SCM_UNDEFINED) + args_and_flags = scm_cons (address, args_and_flags); + } + else + soka = scm_fill_sockaddr (scm_to_int (fam_or_sockaddr), address, + &args_and_flags, 3, 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 + + + +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. + + SOL_IP, SOL_TCP and SOL_UDP are defined on gnu/linux, but not on for + instance NetBSD. We define IPPROTOs because that's what the posix spec + shows in its example at + + http://www.opengroup.org/onlinepubs/007904975/functions/getsockopt.html + */ +#ifdef SOL_SOCKET + scm_c_define ("SOL_SOCKET", scm_from_int (SOL_SOCKET)); +#endif +#ifdef IPPROTO_IP + scm_c_define ("IPPROTO_IP", scm_from_int (IPPROTO_IP)); +#endif +#ifdef IPPROTO_TCP + scm_c_define ("IPPROTO_TCP", scm_from_int (IPPROTO_TCP)); +#endif +#ifdef IPPROTO_UDP + scm_c_define ("IPPROTO_UDP", scm_from_int (IPPROTO_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_DONTWAIT + scm_c_define ("MSG_DONTWAIT", scm_from_int (MSG_DONTWAIT)); +#endif +#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: +*/