mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 03:40:34 +02:00
439006bf6e
taking an unexpectedly large filename for an AF_UNIX socket from bind/connect/sendto (thanks to Martin Grabmueller). * socket.c (scm_sock_fd_to_port, SCM_SOCK_FD_TO_PORT): removed the former and adjusted the latter. (scm_socket, scm_socketpair): cosmetic changes. (scm_getsockopt, scm_setsockopt): declare optlen as int, not size_t as socklen_t substitute. don't restrict args/return values to INUM: allow full range of int or size_t. (scm_fill_sockaddr): check arguments before allocating memory, to avoid leakage. use malloc, not scm_must_malloc. (scm_connect, scm_bind, scm_sendto): use int, not size_t as socklen_t substitute. free the sockaddr structure before throwing an error. (scm_init_add_buffer): procedure removed, together with its static buffer scm_addr_buffer, which wouldn't be thread safe. instead, define a macro MAX_ADDR_SIZE and declare the buffer where needed. (scm_accept, scm_getpeername, scm_getsockname, scm_recvfrom, scm_sendto): use a local buffer instead of scm_addr_buffer. adjust for new SCM_SOCK_FD_TO_PORT. use int for address size, not size_t. (scm_recvfrom): set addr->sa_family to AF_UNSPEC before the recvfrom call to detect whether recvfrom could be bothered to set the address. (scm_init_socket): don't call scm_init_addr_buffer.
1000 lines
31 KiB
C
1000 lines
31 KiB
C
/* Copyright (C) 1996,1997,1998, 2000 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., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 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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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include <stdio.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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#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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/* 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 in),
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"Returns a new integer from @var{value} by converting from host to\n"
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"network order. @var{value} must be within the range of a C unsigned\n"
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"short 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,in,c_in);
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if (c_in != SCM_INUM (in))
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SCM_OUT_OF_RANGE (1,in);
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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 in),
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"Returns a new integer from @var{value} by converting from network to\n"
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"host order. @var{value} must be within the range of a C unsigned short\n"
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"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,in,c_in);
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if (c_in != SCM_INUM (in))
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SCM_OUT_OF_RANGE (1,in);
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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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SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0,
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(SCM in),
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"Returns a new integer from @var{value} by converting from host to\n"
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"network order. @var{value} must be within the range of a C unsigned\n"
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"long integer.")
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#define FUNC_NAME s_scm_htonl
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{
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unsigned long c_in = SCM_NUM2ULONG (1,in);
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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 in),
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"Returns a new integer from @var{value} by converting from network to\n"
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"host order. @var{value} must be within the range of a C unsigned\n"
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"long integer.")
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#define FUNC_NAME s_scm_ntohl
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{
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unsigned long c_in = SCM_NUM2ULONG (1,in);
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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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SCM_SYMBOL (sym_socket, "socket");
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#define SCM_SOCK_FD_TO_PORT(fd) scm_fdes_to_port (fd, "r+0", sym_socket)
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SCM_DEFINE (scm_socket, "socket", 3, 0, 0,
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(SCM family, SCM style, SCM proto),
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"Returns a new socket port of the type specified by @var{family}, @var{style}\n"
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"and @var{protocol}. All three parameters are integers. Typical values\n"
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"for @var{family} are the values of @code{AF_UNIX}\n"
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"and @code{AF_INET}. Typical values for @var{style} are\n"
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"the values of @code{SOCK_STREAM}, @code{SOCK_DGRAM} and @code{SOCK_RAW}.\n\n"
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"@var{protocol} can be obtained from a protocol name using\n"
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"@code{getprotobyname}. A value of\n"
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"zero specifies the default protocol, which is usually right.\n\n"
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"A single socket port cannot by used for communication until\n"
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"it has been connected to another socket.")
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#define FUNC_NAME s_scm_socket
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{
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int fd;
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SCM_VALIDATE_INUM (1, family);
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SCM_VALIDATE_INUM (2, style);
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SCM_VALIDATE_INUM (3, proto);
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fd = socket (SCM_INUM (family), SCM_INUM (style), SCM_INUM (proto));
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if (fd == -1)
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SCM_SYSERROR;
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return SCM_SOCK_FD_TO_PORT (fd);
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}
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#undef FUNC_NAME
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#ifdef HAVE_SOCKETPAIR
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SCM_DEFINE (scm_socketpair, "socketpair", 3, 0, 0,
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(SCM family, SCM style, SCM proto),
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"Returns a pair of connected (but unnamed) socket ports of the type specified\n"
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"by @var{family}, @var{style} and @var{protocol}.\n"
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"Many systems support only\n"
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"socket pairs of the @code{AF_UNIX} family. Zero is likely to be\n"
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"the only meaningful value for @var{protocol}.")
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#define FUNC_NAME s_scm_socketpair
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{
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int fam;
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int fd[2];
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SCM_VALIDATE_INUM (1,family);
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SCM_VALIDATE_INUM (2,style);
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SCM_VALIDATE_INUM (3,proto);
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fam = SCM_INUM (family);
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if (socketpair (fam, SCM_INUM (style), SCM_INUM (proto), fd) == -1)
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SCM_SYSERROR;
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return scm_cons (SCM_SOCK_FD_TO_PORT (fd[0]), SCM_SOCK_FD_TO_PORT (fd[1]));
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}
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#undef FUNC_NAME
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#endif
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SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0,
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(SCM sock, SCM level, SCM optname),
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"Returns the value of a particular socket option for the socket\n"
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"port @var{socket}. @var{level} is an integer code for type of option\n"
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"being requested, e.g., @code{SOL_SOCKET} for socket-level options.\n"
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"@var{optname} is an\n"
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"integer code for the option required and should be specified using one of\n"
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"the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n\n"
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"The returned value is typically an integer but @code{SO_LINGER} returns a\n"
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"pair of integers.")
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#define FUNC_NAME s_scm_getsockopt
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{
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int fd;
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/* size of optval is the largest supported option. */
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#ifdef HAVE_STRUCT_LINGER
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char optval[sizeof (struct linger)];
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int optlen = sizeof (struct linger);
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#else
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char optval[sizeof (scm_sizet)];
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int optlen = sizeof (scm_sizet);
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#endif
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int ilevel;
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int ioptname;
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sock = SCM_COERCE_OUTPORT (sock);
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SCM_VALIDATE_OPFPORT (1, sock);
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SCM_VALIDATE_INUM_COPY (2, level, ilevel);
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SCM_VALIDATE_INUM_COPY (3, optname, ioptname);
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fd = SCM_FPORT_FDES (sock);
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if (getsockopt (fd, ilevel, ioptname, (void *) optval, &optlen) == -1)
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SCM_SYSERROR;
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if (ilevel == SOL_SOCKET)
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{
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#ifdef SO_LINGER
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if (ioptname == SO_LINGER)
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{
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#ifdef HAVE_STRUCT_LINGER
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struct linger *ling = (struct linger *) optval;
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return scm_cons (scm_long2num (ling->l_onoff),
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scm_long2num (ling->l_linger));
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#else
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return scm_cons (scm_long2num (*(int *) optval)
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SCM_MAKINUM (0));
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#endif
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}
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else
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#endif
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if (0
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#ifdef SO_SNDBUF
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|| ioptname == SO_SNDBUF
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#endif
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#ifdef SO_RCVBUF
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|| ioptname == SO_RCVBUF
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#endif
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)
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{
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return scm_long2num (*(scm_sizet *) optval);
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}
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}
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return scm_long2num (*(int *) optval);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_setsockopt, "setsockopt", 4, 0, 0,
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(SCM sock, SCM level, SCM optname, SCM value),
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"Sets the value of a particular socket option for the socket\n"
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"port @var{socket}. @var{level} is an integer code for type of option\n"
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"being set, e.g., @code{SOL_SOCKET} for socket-level options.\n"
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"@var{optname} is an\n"
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"integer code for the option to set and should be specified using one of\n"
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"the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n"
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"@var{value} is the value to which the option should be set. For\n"
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"most options this must be an integer, but for @code{SO_LINGER} it must\n"
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"be a pair.\n\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_setsockopt
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{
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int fd;
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int optlen = -1;
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/* size of optval is the largest supported option. */
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#ifdef HAVE_STRUCT_LINGER
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char optval[sizeof (struct linger)];
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#else
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char optval[sizeof (scm_sizet)];
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#endif
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int ilevel, ioptname;
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sock = SCM_COERCE_OUTPORT (sock);
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SCM_VALIDATE_OPFPORT (1, sock);
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SCM_VALIDATE_INUM_COPY (2, level, ilevel);
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SCM_VALIDATE_INUM_COPY (3, optname, ioptname);
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fd = SCM_FPORT_FDES (sock);
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if (ilevel == SOL_SOCKET)
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{
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#ifdef SO_LINGER
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if (ioptname == SO_LINGER)
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{
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#ifdef HAVE_STRUCT_LINGER
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struct linger ling;
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long lv;
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SCM_ASSERT (SCM_CONSP (value), value, SCM_ARG4, FUNC_NAME);
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lv = SCM_NUM2LONG (4, SCM_CAR (value));
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ling.l_onoff = (int) lv;
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SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_onoff == lv);
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lv = SCM_NUM2LONG (4, SCM_CDR (value));
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ling.l_linger = (int) lv;
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SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_linger == lv);
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optlen = (int) sizeof (struct linger);
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memcpy (optval, (void *) &ling, optlen);
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#else
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int ling;
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long lv;
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SCM_ASSERT (SCM_CONSP (value), value, SCM_ARG4, FUNC_NAME);
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/* timeout is ignored, but may as well validate it. */
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lv = SCM_NUM2LONG (4, SCM_CDR (value));
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ling = (int) lv;
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SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv);
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lv = SCM_NUM2LONG (4, SCM_CAR (value));
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ling = (int) lv;
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SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv);
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optlen = (int) sizeof (int);
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(*(int *) optval) = ling;
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#endif
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}
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else
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#endif
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if (0
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#ifdef SO_SNDBUF
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|| ioptname == SO_SNDBUF
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#endif
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#ifdef SO_RCVBUF
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|| ioptname == SO_RCVBUF
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#endif
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)
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{
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long lv = SCM_NUM2LONG (4, value);
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optlen = (int) sizeof (scm_sizet);
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(*(scm_sizet *) optval) = (scm_sizet) lv;
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}
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}
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if (optlen == -1)
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{
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/* Most options take an int. */
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long lv = SCM_NUM2LONG (4, value);
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int val = (int) lv;
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SCM_ASSERT_RANGE (SCM_ARG4, value, val == lv);
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optlen = (int) sizeof (int);
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(*(int *) optval) = val;
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}
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if (setsockopt (fd, ilevel, ioptname, (void *) optval, optlen) == -1)
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SCM_SYSERROR;
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return SCM_UNSPECIFIED;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_shutdown, "shutdown", 2, 0, 0,
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(SCM sock, SCM how),
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"Sockets can be closed simply by using @code{close-port}. The\n"
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"@code{shutdown} procedure allows reception or tranmission on a\n"
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"connection to be shut down individually, according to the parameter\n"
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"@var{how}:\n\n"
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"@table @asis\n"
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"@item 0\n"
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"Stop receiving data for this socket. If further data arrives, reject it.\n"
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"@item 1\n"
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"Stop trying to transmit data from this socket. Discard any\n"
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"data waiting to be sent. Stop looking for acknowledgement of\n"
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"data already sent; don't retransmit it if it is lost.\n"
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"@item 2\n"
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"Stop both reception and transmission.\n"
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"@end table\n\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_shutdown
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{
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int fd;
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sock = SCM_COERCE_OUTPORT (sock);
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SCM_VALIDATE_OPFPORT (1,sock);
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SCM_VALIDATE_INUM (2,how);
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SCM_ASSERT_RANGE(2,how,0 <= SCM_INUM (how) && 2 >= SCM_INUM (how));
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fd = SCM_FPORT_FDES (sock);
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if (shutdown (fd, SCM_INUM (how)) == -1)
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SCM_SYSERROR;
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return SCM_UNSPECIFIED;
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}
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#undef FUNC_NAME
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/* convert fam/address/args into a sockaddr of the appropriate type.
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args is modified by removing the arguments actually used.
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which_arg and proc are used when reporting errors:
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which_arg is the position of address in the original argument list.
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proc is the name of the original procedure.
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size returns the size of the structure allocated. */
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static struct sockaddr *
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scm_fill_sockaddr (int fam, SCM address, SCM *args, int which_arg,
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const char *proc, int *size)
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{
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switch (fam)
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{
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case AF_INET:
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{
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SCM isport;
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struct sockaddr_in *soka;
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SCM_ASSERT (SCM_CONSP (*args), *args,
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which_arg + 1, proc);
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isport = SCM_CAR (*args);
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SCM_ASSERT (SCM_INUMP (isport), isport, which_arg + 1, proc);
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soka = (struct sockaddr_in *) malloc (sizeof (struct sockaddr_in));
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if (!soka)
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scm_memory_error (proc);
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/* e.g., for BSDs which don't like invalid sin_len. */
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memset (soka, 0, sizeof (struct sockaddr_in));
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soka->sin_family = AF_INET;
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soka->sin_addr.s_addr =
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htonl (scm_num2ulong (address, (char *) which_arg, proc));
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*args = SCM_CDR (*args);
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soka->sin_port = htons (SCM_INUM (isport));
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*size = sizeof (struct sockaddr_in);
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return (struct sockaddr *) soka;
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}
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#ifdef HAVE_UNIX_DOMAIN_SOCKETS
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case AF_UNIX:
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{
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struct sockaddr_un *soka;
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int addr_size;
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SCM_ASSERT (SCM_STRINGP (address), address, which_arg, proc);
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/* the static buffer size in sockaddr_un seems to be arbitrary
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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:
|
||
*/
|