mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 03:40:34 +02:00
0e558e5693
(scm_htonl, scm_ntohl): Use it to enforce 32-bit range check on systems with 64-bit long.
1423 lines
42 KiB
C
1423 lines
42 KiB
C
/* Copyright (C) 1996, 1997, 1998, 2000, 2001, 2004, 2005 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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#include <errno.h>
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#include "libguile/_scm.h"
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#include "libguile/unif.h"
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#include "libguile/feature.h"
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#include "libguile/fports.h"
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#include "libguile/strings.h"
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#include "libguile/vectors.h"
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#include "libguile/validate.h"
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#include "libguile/socket.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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#ifdef HAVE_WINSOCK2_H
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#include <winsock2.h>
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#else
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#include <sys/socket.h>
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#ifdef HAVE_UNIX_DOMAIN_SOCKETS
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#include <sys/un.h>
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#endif
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#include <netinet/in.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#endif
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/* Temporary hack -- in the next major Guile release, this will be
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handled more generally. */
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#ifndef HAVE_SOCKLEN_T
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typedef int socklen_t;
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#endif
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#if defined (HAVE_UNIX_DOMAIN_SOCKETS) && !defined (SUN_LEN)
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#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
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+ strlen ((ptr)->sun_path))
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#endif
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#if !defined (HAVE_UINT32_T)
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#if SIZEOF_INT == 4
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typedef unsigned int uint32_t;
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#elif SIZEOF_LONG == 4
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typedef unsigned long uint32_t;
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#else
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#error can not define uint32_t
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#endif
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#endif
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/* we are not currently using socklen_t. it's not defined on all systems,
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so would need to be checked by configure. in the meantime, plain
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int is the best alternative. */
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SCM_DEFINE (scm_htons, "htons", 1, 0, 0,
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(SCM value),
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"Convert a 16 bit quantity from host to network byte ordering.\n"
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"@var{value} is packed into 2 bytes, which are then converted\n"
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"and returned as a new integer.")
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#define FUNC_NAME s_scm_htons
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{
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unsigned short c_in;
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SCM_VALIDATE_INUM_COPY (1, value, c_in);
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if (c_in != SCM_INUM (value))
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SCM_OUT_OF_RANGE (1, value);
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return SCM_MAKINUM (htons (c_in));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_ntohs, "ntohs", 1, 0, 0,
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(SCM value),
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"Convert a 16 bit quantity from network to host byte ordering.\n"
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"@var{value} is packed into 2 bytes, which are then converted\n"
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"and returned as a new integer.")
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#define FUNC_NAME s_scm_ntohs
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{
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unsigned short c_in;
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SCM_VALIDATE_INUM_COPY (1, value, c_in);
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if (c_in != SCM_INUM (value))
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SCM_OUT_OF_RANGE (1, value);
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return SCM_MAKINUM (ntohs (c_in));
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}
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#undef FUNC_NAME
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static uint32_t
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scm_num2uint32 (SCM num, unsigned long int pos, const char *func)
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{
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unsigned long uu = scm_num2ulong (num, pos, func);
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#if SIZEOF_LONG > 4
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if (uu > 0xFFFFFFFFL)
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scm_out_of_range (s_caller, num);
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#endif
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return (uint32_t) uu;
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}
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SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0,
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(SCM value),
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"Convert a 32 bit quantity from host to network byte ordering.\n"
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"@var{value} is packed into 4 bytes, which are then converted\n"
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"and returned as a new integer.")
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#define FUNC_NAME s_scm_htonl
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{
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uint32_t c_in = scm_num2uint32 (value, SCM_ARG1, FUNC_NAME);
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return scm_ulong2num (htonl (c_in));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_ntohl, "ntohl", 1, 0, 0,
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(SCM value),
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"Convert a 32 bit quantity from network to host byte ordering.\n"
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"@var{value} is packed into 4 bytes, which are then converted\n"
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"and returned as a new integer.")
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#define FUNC_NAME s_scm_ntohl
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{
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uint32_t c_in = scm_num2uint32 (value, SCM_ARG1, FUNC_NAME);
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return scm_ulong2num (ntohl (c_in));
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}
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#undef FUNC_NAME
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#ifndef HAVE_INET_ATON
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/* for our definition in inet_aton.c, not usually needed. */
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extern int inet_aton ();
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#endif
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SCM_DEFINE (scm_inet_aton, "inet-aton", 1, 0, 0,
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(SCM address),
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"Convert an IPv4 Internet address from printable string\n"
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"(dotted decimal notation) to an integer. E.g.,\n\n"
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"@lisp\n"
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"(inet-aton \"127.0.0.1\") @result{} 2130706433\n"
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"@end lisp")
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#define FUNC_NAME s_scm_inet_aton
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{
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struct in_addr soka;
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SCM_VALIDATE_STRING (1, address);
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SCM_STRING_COERCE_0TERMINATION_X (address);
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if (inet_aton (SCM_STRING_CHARS (address), &soka) == 0)
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SCM_MISC_ERROR ("bad address", SCM_EOL);
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return scm_ulong2num (ntohl (soka.s_addr));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_inet_ntoa, "inet-ntoa", 1, 0, 0,
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(SCM inetid),
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"Convert an IPv4 Internet address to a printable\n"
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"(dotted decimal notation) string. E.g.,\n\n"
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"@lisp\n"
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"(inet-ntoa 2130706433) @result{} \"127.0.0.1\"\n"
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"@end lisp")
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#define FUNC_NAME s_scm_inet_ntoa
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{
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struct in_addr addr;
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char *s;
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SCM answer;
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addr.s_addr = htonl (SCM_NUM2ULONG (1, inetid));
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s = inet_ntoa (addr);
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answer = scm_mem2string (s, strlen (s));
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return answer;
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}
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#undef FUNC_NAME
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#ifdef HAVE_INET_NETOF
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SCM_DEFINE (scm_inet_netof, "inet-netof", 1, 0, 0,
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(SCM address),
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"Return the network number part of the given IPv4\n"
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"Internet address. E.g.,\n\n"
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"@lisp\n"
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"(inet-netof 2130706433) @result{} 127\n"
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"@end lisp")
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#define FUNC_NAME s_scm_inet_netof
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{
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struct in_addr addr;
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addr.s_addr = htonl (SCM_NUM2ULONG (1, address));
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return scm_ulong2num ((unsigned long) inet_netof (addr));
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}
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#undef FUNC_NAME
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#endif
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#ifdef HAVE_INET_LNAOF
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SCM_DEFINE (scm_lnaof, "inet-lnaof", 1, 0, 0,
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(SCM address),
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"Return the local-address-with-network part of the given\n"
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"IPv4 Internet address, using the obsolete class A/B/C system.\n"
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"E.g.,\n\n"
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"@lisp\n"
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"(inet-lnaof 2130706433) @result{} 1\n"
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"@end lisp")
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#define FUNC_NAME s_scm_lnaof
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{
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struct in_addr addr;
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addr.s_addr = htonl (SCM_NUM2ULONG (1, address));
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return scm_ulong2num ((unsigned long) inet_lnaof (addr));
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}
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#undef FUNC_NAME
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#endif
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#ifdef HAVE_INET_MAKEADDR
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SCM_DEFINE (scm_inet_makeaddr, "inet-makeaddr", 2, 0, 0,
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(SCM net, SCM lna),
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"Make an IPv4 Internet address by combining the network number\n"
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"@var{net} with the local-address-within-network number\n"
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"@var{lna}. E.g.,\n\n"
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"@lisp\n"
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"(inet-makeaddr 127 1) @result{} 2130706433\n"
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"@end lisp")
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#define FUNC_NAME s_scm_inet_makeaddr
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{
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struct in_addr addr;
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unsigned long netnum;
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unsigned long lnanum;
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netnum = SCM_NUM2ULONG (1, net);
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lnanum = SCM_NUM2ULONG (2, lna);
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addr = inet_makeaddr (netnum, lnanum);
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return scm_ulong2num (ntohl (addr.s_addr));
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}
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#undef FUNC_NAME
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#endif
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#ifdef HAVE_IPV6
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/* flip a 128 bit IPv6 address between host and network order. */
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#ifdef WORDS_BIGENDIAN
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#define FLIP_NET_HOST_128(addr)
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#else
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#define FLIP_NET_HOST_128(addr)\
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{\
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int i;\
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\
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for (i = 0; i < 8; i++)\
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{\
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char c = (addr)[i];\
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\
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(addr)[i] = (addr)[15 - i];\
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(addr)[15 - i] = c;\
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}\
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}
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#endif
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/* convert a 128 bit IPv6 address in network order to a host ordered
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SCM integer. */
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static SCM ipv6_net_to_num (const unsigned char *src)
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{
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int big_digits = 128 / SCM_BITSPERDIG;
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const int bytes_per_dig = SCM_BITSPERDIG / 8;
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unsigned char addr[16];
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unsigned char *ptr = addr;
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SCM result;
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memcpy (addr, src, 16);
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/* get rid of leading zeros. */
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while (big_digits > 0)
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{
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long test = 0;
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memcpy (&test, ptr, bytes_per_dig);
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if (test != 0)
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break;
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ptr += bytes_per_dig;
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big_digits--;
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}
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FLIP_NET_HOST_128 (addr);
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if (big_digits * bytes_per_dig <= sizeof (unsigned long))
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{
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/* this is just so that we use INUM where possible. */
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unsigned long l_addr;
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memcpy (&l_addr, addr, sizeof (unsigned long));
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result = scm_ulong2num (l_addr);
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}
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else
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{
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result = scm_i_mkbig (big_digits, 0);
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memcpy (SCM_BDIGITS (result), addr, big_digits * bytes_per_dig);
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}
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return result;
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}
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/* convert a host ordered SCM integer to a 128 bit IPv6 address in
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network order. */
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static void ipv6_num_to_net (SCM src, unsigned char *dst)
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{
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if (SCM_INUMP (src))
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{
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uint32_t addr = htonl (SCM_INUM (src));
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memset (dst, 0, 12);
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memcpy (dst + 12, &addr, 4);
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}
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else
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{
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memset (dst, 0, 16);
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memcpy (dst, SCM_BDIGITS (src),
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SCM_NUMDIGS (src) * (SCM_BITSPERDIG / 8));
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FLIP_NET_HOST_128 (dst);
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}
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}
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/* check that an SCM variable contains an IPv6 integer address. */
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#define VALIDATE_INET6(which_arg, address)\
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if (SCM_INUMP (address))\
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SCM_ASSERT_RANGE (which_arg, address, SCM_INUM (address) >= 0);\
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else\
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{\
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SCM_VALIDATE_BIGINT (which_arg, address);\
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SCM_ASSERT_RANGE (which_arg, address,\
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!SCM_BIGSIGN (address)\
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&& (SCM_BITSPERDIG\
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* SCM_NUMDIGS (address) <= 128));\
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}
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#ifdef HAVE_INET_PTON
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SCM_DEFINE (scm_inet_pton, "inet-pton", 2, 0, 0,
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(SCM family, SCM address),
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"Convert a string containing a printable network address to\n"
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"an integer address. Note that unlike the C version of this\n"
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"function,\n"
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"the result is an integer with normal host byte ordering.\n"
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"@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n"
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"@lisp\n"
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"(inet-pton AF_INET \"127.0.0.1\") @result{} 2130706433\n"
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"(inet-pton AF_INET6 \"::1\") @result{} 1\n"
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"@end lisp")
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#define FUNC_NAME s_scm_inet_pton
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{
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int af;
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char *src;
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unsigned char dst[16];
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int rv;
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SCM_VALIDATE_INUM_COPY (1, family, af);
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SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6);
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SCM_VALIDATE_STRING_COPY (2, address, src);
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rv = inet_pton (af, src, dst);
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if (rv == -1)
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SCM_SYSERROR;
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else if (rv == 0)
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SCM_MISC_ERROR ("Bad address", SCM_EOL);
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if (af == AF_INET)
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return scm_ulong2num (ntohl (*(uint32_t *) dst));
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else
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return ipv6_net_to_num (dst);
|
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}
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#undef FUNC_NAME
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#endif
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#ifdef HAVE_INET_NTOP
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SCM_DEFINE (scm_inet_ntop, "inet-ntop", 2, 0, 0,
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(SCM family, SCM address),
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||
"Convert a network address into a printable string.\n"
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||
"Note that unlike the C version of this function,\n"
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||
"the input is an integer with normal host byte ordering.\n"
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||
"@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n"
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||
"@lisp\n"
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||
"(inet-ntop AF_INET 2130706433) @result{} \"127.0.0.1\"\n"
|
||
"(inet-ntop AF_INET6 (- (expt 2 128) 1)) @result{}\n"
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||
"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff\n"
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||
"@end lisp")
|
||
#define FUNC_NAME s_scm_inet_ntop
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{
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int af;
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#ifdef INET6_ADDRSTRLEN
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char dst[INET6_ADDRSTRLEN];
|
||
#else
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char dst[46];
|
||
#endif
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unsigned char addr6[16];
|
||
|
||
SCM_VALIDATE_INUM_COPY (1, family, af);
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SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6);
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if (af == AF_INET)
|
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*(uint32_t *) addr6 = htonl (SCM_NUM2ULONG (2, address));
|
||
else
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||
{
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||
VALIDATE_INET6 (2, address);
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ipv6_num_to_net (address, addr6);
|
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}
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if (inet_ntop (af, &addr6, dst, sizeof dst) == NULL)
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SCM_SYSERROR;
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return scm_makfrom0str (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;
|
||
|
||
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),
|
||
"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];
|
||
|
||
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),
|
||
"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)];
|
||
socklen_t optlen = sizeof (struct linger);
|
||
#else
|
||
char optval[sizeof (size_t)];
|
||
socklen_t optlen = sizeof (size_t);
|
||
#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 (*(size_t *) 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),
|
||
"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 optlen = -1;
|
||
/* size of optval is the largest supported option. */
|
||
#ifdef HAVE_STRUCT_LINGER
|
||
char optval[sizeof (struct linger)];
|
||
#else
|
||
char optval[sizeof (size_t)];
|
||
#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 (size_t);
|
||
(*(size_t *) optval) = (size_t) 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 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);
|
||
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)
|
||
#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);
|
||
SCM_VALIDATE_INUM_COPY (which_arg + 1, SCM_CAR (*args), port);
|
||
*args = SCM_CDR (*args);
|
||
soka = (struct sockaddr_in *) 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;
|
||
|
||
VALIDATE_INET6 (which_arg, address);
|
||
SCM_VALIDATE_CONS (which_arg + 1, *args);
|
||
SCM_VALIDATE_INUM_COPY (which_arg + 1, SCM_CAR (*args), port);
|
||
*args = SCM_CDR (*args);
|
||
if (SCM_CONSP (*args))
|
||
{
|
||
SCM_VALIDATE_ULONG_COPY (which_arg + 2, SCM_CAR (*args), flowinfo);
|
||
*args = SCM_CDR (*args);
|
||
if (SCM_CONSP (*args))
|
||
{
|
||
SCM_VALIDATE_ULONG_COPY (which_arg + 3, SCM_CAR (*args),
|
||
scope_id);
|
||
*args = SCM_CDR (*args);
|
||
}
|
||
}
|
||
soka = (struct sockaddr_in6 *) 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;
|
||
ipv6_num_to_net (address, soka->sin6_addr.s6_addr);
|
||
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;
|
||
|
||
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));
|
||
}
|
||
}
|
||
#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);
|
||
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),
|
||
"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);
|
||
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),
|
||
"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);
|
||
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 (const struct sockaddr *address, const char *proc)
|
||
{
|
||
short int fam = address->sa_family;
|
||
SCM result;
|
||
SCM *ve;
|
||
|
||
switch (fam)
|
||
{
|
||
case AF_INET:
|
||
{
|
||
const 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));
|
||
}
|
||
break;
|
||
#ifdef HAVE_IPV6
|
||
case AF_INET6:
|
||
{
|
||
const struct sockaddr_in6 *nad = (struct sockaddr_in6 *) address;
|
||
|
||
result = scm_c_make_vector (5, SCM_UNSPECIFIED);
|
||
ve = SCM_VELTS (result);
|
||
ve[0] = scm_ulong2num ((unsigned long) fam);
|
||
ve[1] = ipv6_net_to_num (nad->sin6_addr.s6_addr);
|
||
ve[2] = scm_ulong2num ((unsigned long) ntohs (nad->sin6_port));
|
||
ve[3] = scm_ulong2num ((unsigned long) nad->sin6_flowinfo);
|
||
#ifdef HAVE_SIN6_SCOPE_ID
|
||
ve[4] = scm_ulong2num ((unsigned long) nad->sin6_scope_id);
|
||
#else
|
||
ve[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);
|
||
ve = SCM_VELTS (result);
|
||
ve[0] = scm_ulong2num ((unsigned long) fam);
|
||
ve[1] = scm_mem2string (nad->sun_path, strlen (nad->sun_path));
|
||
}
|
||
break;
|
||
#endif
|
||
default:
|
||
scm_misc_error (proc, "Unrecognised address family: ~A",
|
||
scm_list_1 (SCM_MAKINUM (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;
|
||
socklen_t 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, 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;
|
||
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, 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;
|
||
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, 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;
|
||
|
||
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),
|
||
"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;
|
||
|
||
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),
|
||
"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;
|
||
int offset;
|
||
int cend;
|
||
SCM address;
|
||
socklen_t 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. usually nothing
|
||
is returned for stream sockets. */
|
||
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->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),
|
||
"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);
|
||
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_c_define ("AF_UNSPEC", SCM_MAKINUM (AF_UNSPEC));
|
||
#endif
|
||
#ifdef AF_UNIX
|
||
scm_c_define ("AF_UNIX", SCM_MAKINUM (AF_UNIX));
|
||
#endif
|
||
#ifdef AF_INET
|
||
scm_c_define ("AF_INET", SCM_MAKINUM (AF_INET));
|
||
#endif
|
||
#ifdef AF_INET6
|
||
scm_c_define ("AF_INET6", SCM_MAKINUM (AF_INET6));
|
||
#endif
|
||
|
||
#ifdef PF_UNSPEC
|
||
scm_c_define ("PF_UNSPEC", SCM_MAKINUM (PF_UNSPEC));
|
||
#endif
|
||
#ifdef PF_UNIX
|
||
scm_c_define ("PF_UNIX", SCM_MAKINUM (PF_UNIX));
|
||
#endif
|
||
#ifdef PF_INET
|
||
scm_c_define ("PF_INET", SCM_MAKINUM (PF_INET));
|
||
#endif
|
||
#ifdef PF_INET6
|
||
scm_c_define ("PF_INET6", SCM_MAKINUM (PF_INET6));
|
||
#endif
|
||
|
||
/* standard addresses. */
|
||
#ifdef INADDR_ANY
|
||
scm_c_define ("INADDR_ANY", scm_ulong2num (INADDR_ANY));
|
||
#endif
|
||
#ifdef INADDR_BROADCAST
|
||
scm_c_define ("INADDR_BROADCAST", scm_ulong2num (INADDR_BROADCAST));
|
||
#endif
|
||
#ifdef INADDR_NONE
|
||
scm_c_define ("INADDR_NONE", scm_ulong2num (INADDR_NONE));
|
||
#endif
|
||
#ifdef INADDR_LOOPBACK
|
||
scm_c_define ("INADDR_LOOPBACK", scm_ulong2num (INADDR_LOOPBACK));
|
||
#endif
|
||
|
||
/* socket types.
|
||
|
||
SOCK_PACKET is deliberately omitted, the GNU/Linux socket(2) and
|
||
packet(7) man pages advise that it's obsolete and strongly
|
||
deprecated. */
|
||
|
||
#ifdef SOCK_STREAM
|
||
scm_c_define ("SOCK_STREAM", SCM_MAKINUM (SOCK_STREAM));
|
||
#endif
|
||
#ifdef SOCK_DGRAM
|
||
scm_c_define ("SOCK_DGRAM", SCM_MAKINUM (SOCK_DGRAM));
|
||
#endif
|
||
#ifdef SOCK_SEQPACKET
|
||
scm_c_define ("SOCK_SEQPACKET", SCM_MAKINUM (SOCK_SEQPACKET));
|
||
#endif
|
||
#ifdef SOCK_RAW
|
||
scm_c_define ("SOCK_RAW", SCM_MAKINUM (SOCK_RAW));
|
||
#endif
|
||
#ifdef SOCK_RDM
|
||
scm_c_define ("SOCK_RDM", SCM_MAKINUM (SOCK_RDM));
|
||
#endif
|
||
|
||
/* setsockopt level. */
|
||
#ifdef SOL_SOCKET
|
||
scm_c_define ("SOL_SOCKET", SCM_MAKINUM (SOL_SOCKET));
|
||
#endif
|
||
#ifdef SOL_IP
|
||
scm_c_define ("SOL_IP", SCM_MAKINUM (SOL_IP));
|
||
#endif
|
||
#ifdef SOL_TCP
|
||
scm_c_define ("SOL_TCP", SCM_MAKINUM (SOL_TCP));
|
||
#endif
|
||
#ifdef SOL_UDP
|
||
scm_c_define ("SOL_UDP", SCM_MAKINUM (SOL_UDP));
|
||
#endif
|
||
|
||
/* setsockopt names. */
|
||
#ifdef SO_DEBUG
|
||
scm_c_define ("SO_DEBUG", SCM_MAKINUM (SO_DEBUG));
|
||
#endif
|
||
#ifdef SO_REUSEADDR
|
||
scm_c_define ("SO_REUSEADDR", SCM_MAKINUM (SO_REUSEADDR));
|
||
#endif
|
||
#ifdef SO_STYLE
|
||
scm_c_define ("SO_STYLE", SCM_MAKINUM (SO_STYLE));
|
||
#endif
|
||
#ifdef SO_TYPE
|
||
scm_c_define ("SO_TYPE", SCM_MAKINUM (SO_TYPE));
|
||
#endif
|
||
#ifdef SO_ERROR
|
||
scm_c_define ("SO_ERROR", SCM_MAKINUM (SO_ERROR));
|
||
#endif
|
||
#ifdef SO_DONTROUTE
|
||
scm_c_define ("SO_DONTROUTE", SCM_MAKINUM (SO_DONTROUTE));
|
||
#endif
|
||
#ifdef SO_BROADCAST
|
||
scm_c_define ("SO_BROADCAST", SCM_MAKINUM (SO_BROADCAST));
|
||
#endif
|
||
#ifdef SO_SNDBUF
|
||
scm_c_define ("SO_SNDBUF", SCM_MAKINUM (SO_SNDBUF));
|
||
#endif
|
||
#ifdef SO_RCVBUF
|
||
scm_c_define ("SO_RCVBUF", SCM_MAKINUM (SO_RCVBUF));
|
||
#endif
|
||
#ifdef SO_KEEPALIVE
|
||
scm_c_define ("SO_KEEPALIVE", SCM_MAKINUM (SO_KEEPALIVE));
|
||
#endif
|
||
#ifdef SO_OOBINLINE
|
||
scm_c_define ("SO_OOBINLINE", SCM_MAKINUM (SO_OOBINLINE));
|
||
#endif
|
||
#ifdef SO_NO_CHECK
|
||
scm_c_define ("SO_NO_CHECK", SCM_MAKINUM (SO_NO_CHECK));
|
||
#endif
|
||
#ifdef SO_PRIORITY
|
||
scm_c_define ("SO_PRIORITY", SCM_MAKINUM (SO_PRIORITY));
|
||
#endif
|
||
#ifdef SO_LINGER
|
||
scm_c_define ("SO_LINGER", SCM_MAKINUM (SO_LINGER));
|
||
#endif
|
||
|
||
/* recv/send options. */
|
||
#ifdef MSG_OOB
|
||
scm_c_define ("MSG_OOB", SCM_MAKINUM (MSG_OOB));
|
||
#endif
|
||
#ifdef MSG_PEEK
|
||
scm_c_define ("MSG_PEEK", SCM_MAKINUM (MSG_PEEK));
|
||
#endif
|
||
#ifdef MSG_DONTROUTE
|
||
scm_c_define ("MSG_DONTROUTE", SCM_MAKINUM (MSG_DONTROUTE));
|
||
#endif
|
||
|
||
scm_add_feature ("socket");
|
||
|
||
#include "libguile/socket.x"
|
||
}
|
||
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|