mirror of
https://git.savannah.gnu.org/git/guile.git
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6d736fdba2
* libguile/gc_os_dep.c (GC_linux_stack_base) [LINUX_STACKBOTTOM]: cast input of ctype functions to int * libguile/inet_aton.c (inet_aton): cast input of ctype functions to int * libguile/read.c (scm_scan_for_encoding): cast input of isalnum to int * libguile/win32-socket.c (scm_i_socket_uncomment): cast input of isspace to int
632 lines
20 KiB
C
632 lines
20 KiB
C
/* Copyright (C) 2001, 2006 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "libguile/__scm.h"
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#include "libguile/modules.h"
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#include "libguile/numbers.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#ifndef PATH_MAX
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#define PATH_MAX 255
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#endif
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#include "win32-socket.h"
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/* Winsock API error description structure. The error description is
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necessary because there is no error list available. */
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typedef struct
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{
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int error; /* Error code. */
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char *str; /* Error description. */
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int replace; /* Possible error code replacement. */
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char *replace_str; /* Replacement symbol. */
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char *correct_str; /* Original symbol. */
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}
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socket_error_t;
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#define FILE_ETC_SERVICES "services"
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#define ENVIRON_ETC_SERVICES "SERVICES"
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#define FILE_ETC_NETWORKS "networks"
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#define ENVIRON_ETC_NETWORKS "NETWORKS"
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#define FILE_ETC_PROTOCOLS "protocol"
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#define ENVIRON_ETC_PROTOCOLS "PROTOCOLS"
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#define MAX_NAMLEN 256
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#define MAX_ALIASES 4
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/* Internal structure for a thread's M$-Windows servent interface. */
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typedef struct
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{
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FILE *fd; /* Current file. */
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char file[PATH_MAX]; /* File name. */
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struct servent ent; /* Return value. */
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char name[MAX_NAMLEN]; /* Service name. */
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char proto[MAX_NAMLEN]; /* Protocol name. */
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char alias[MAX_ALIASES][MAX_NAMLEN]; /* All aliases. */
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char *aliases[MAX_ALIASES]; /* Alias pointers. */
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int port; /* Network port. */
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}
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scm_i_servent_t;
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static scm_i_servent_t scm_i_servent;
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/* Internal structure for a thread's M$-Windows protoent interface. */
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typedef struct
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{
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FILE *fd; /* Current file. */
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char file[PATH_MAX]; /* File name. */
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struct protoent ent; /* Return value. */
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char name[MAX_NAMLEN]; /* Protocol name. */
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char alias[MAX_ALIASES][MAX_NAMLEN]; /* All aliases. */
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char *aliases[MAX_ALIASES]; /* Alias pointers. */
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int proto; /* Protocol number. */
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}
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scm_i_protoent_t;
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static scm_i_protoent_t scm_i_protoent;
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/* Define replacement symbols for most of the WSA* error codes. */
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#ifndef EWOULDBLOCK
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# define EWOULDBLOCK WSAEWOULDBLOCK
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#endif
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#ifndef EINPROGRESS
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# define EINPROGRESS WSAEINPROGRESS
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#endif
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#ifndef EALREADY
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# define EALREADY WSAEALREADY
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#endif
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#ifndef EDESTADDRREQ
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# define EDESTADDRREQ WSAEDESTADDRREQ
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#endif
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#ifndef EMSGSIZE
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# define EMSGSIZE WSAEMSGSIZE
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#endif
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#ifndef EPROTOTYPE
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# define EPROTOTYPE WSAEPROTOTYPE
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#endif
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#ifndef ENOTSOCK
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# define ENOTSOCK WSAENOTSOCK
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#endif
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#ifndef ENOPROTOOPT
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# define ENOPROTOOPT WSAENOPROTOOPT
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#endif
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#ifndef EPROTONOSUPPORT
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# define EPROTONOSUPPORT WSAEPROTONOSUPPORT
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#endif
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#ifndef ESOCKTNOSUPPORT
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# define ESOCKTNOSUPPORT WSAESOCKTNOSUPPORT
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#endif
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#ifndef EOPNOTSUPP
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# define EOPNOTSUPP WSAEOPNOTSUPP
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#endif
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#ifndef EPFNOSUPPORT
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# define EPFNOSUPPORT WSAEPFNOSUPPORT
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#endif
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#ifndef EAFNOSUPPORT
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# define EAFNOSUPPORT WSAEAFNOSUPPORT
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#endif
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#ifndef EADDRINUSE
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# define EADDRINUSE WSAEADDRINUSE
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#endif
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#ifndef EADDRNOTAVAIL
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# define EADDRNOTAVAIL WSAEADDRNOTAVAIL
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#endif
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#ifndef ENETDOWN
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# define ENETDOWN WSAENETDOWN
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#endif
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#ifndef ENETUNREACH
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# define ENETUNREACH WSAENETUNREACH
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#endif
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#ifndef ENETRESET
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# define ENETRESET WSAENETRESET
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#endif
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#ifndef ECONNABORTED
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# define ECONNABORTED WSAECONNABORTED
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#endif
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#ifndef ECONNRESET
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# define ECONNRESET WSAECONNRESET
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#endif
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#ifndef ENOBUFS
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# define ENOBUFS WSAENOBUFS
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#endif
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#ifndef EISCONN
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# define EISCONN WSAEISCONN
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#endif
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#ifndef ENOTCONN
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# define ENOTCONN WSAENOTCONN
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#endif
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#ifndef ESHUTDOWN
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# define ESHUTDOWN WSAESHUTDOWN
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#endif
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#ifndef ETOOMANYREFS
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# define ETOOMANYREFS WSAETOOMANYREFS
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#endif
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#ifndef ETIMEDOUT
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# define ETIMEDOUT WSAETIMEDOUT
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#endif
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#ifndef ECONNREFUSED
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# define ECONNREFUSED WSAECONNREFUSED
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#endif
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#ifndef ELOOP
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# define ELOOP WSAELOOP
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#endif
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#ifndef EHOSTDOWN
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# define EHOSTDOWN WSAEHOSTDOWN
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#endif
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#ifndef EHOSTUNREACH
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# define EHOSTUNREACH WSAEHOSTUNREACH
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#endif
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#ifndef EPROCLIM
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# define EPROCLIM WSAEPROCLIM
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#endif
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#ifndef EUSERS
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# define EUSERS WSAEUSERS
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#endif
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#ifndef EDQUOT
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# define EDQUOT WSAEDQUOT
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#endif
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#ifndef ESTALE
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# define ESTALE WSAESTALE
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#endif
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#ifndef EREMOTE
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# define EREMOTE WSAEREMOTE
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#endif
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/* List of error structures. */
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static socket_error_t socket_errno [] = {
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/* 000 */ { 0, NULL, 0, NULL, NULL },
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/* 001 */ { 0, NULL, 0, NULL, NULL },
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/* 002 */ { 0, NULL, 0, NULL, NULL },
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/* 003 */ { 0, NULL, 0, NULL, NULL },
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/* 004 */ { WSAEINTR, "Interrupted function call", EINTR, NULL, "WSAEINTR" },
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/* 005 */ { 0, NULL, 0, NULL, NULL },
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/* 006 */ { 0, NULL, 0, NULL, NULL },
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/* 007 */ { 0, NULL, 0, NULL, NULL },
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/* 008 */ { 0, NULL, 0, NULL, NULL },
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/* 009 */ { WSAEBADF, "Bad file number", EBADF, NULL, "WSAEBADF" },
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/* 010 */ { 0, NULL, 0, NULL, NULL },
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/* 011 */ { 0, NULL, 0, NULL, NULL },
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/* 012 */ { 0, NULL, 0, NULL, NULL },
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/* 013 */ { WSAEACCES, "Permission denied", EACCES, NULL, "WSAEACCES" },
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/* 014 */ { WSAEFAULT, "Bad address", EFAULT, NULL, "WSAEFAULT" },
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/* 015 */ { 0, NULL, 0, NULL, NULL },
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/* 016 */ { 0, NULL, 0, NULL, NULL },
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/* 017 */ { 0, NULL, 0, NULL, NULL },
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/* 018 */ { 0, NULL, 0, NULL, NULL },
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/* 019 */ { 0, NULL, 0, NULL, NULL },
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/* 020 */ { 0, NULL, 0, NULL, NULL },
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/* 021 */ { 0, NULL, 0, NULL, NULL },
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/* 022 */ { WSAEINVAL, "Invalid argument", EINVAL, NULL, "WSAEINVAL" },
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/* 023 */ { 0, NULL, 0, NULL, NULL },
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/* 024 */ { WSAEMFILE, "Too many open files", EMFILE, NULL, "WSAEMFILE" },
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/* 025 */ { 0, NULL, 0, NULL, NULL },
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/* 026 */ { 0, NULL, 0, NULL, NULL },
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/* 027 */ { 0, NULL, 0, NULL, NULL },
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/* 028 */ { 0, NULL, 0, NULL, NULL },
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/* 029 */ { 0, NULL, 0, NULL, NULL },
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/* 030 */ { 0, NULL, 0, NULL, NULL },
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/* 031 */ { 0, NULL, 0, NULL, NULL },
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/* 032 */ { 0, NULL, 0, NULL, NULL },
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/* 033 */ { 0, NULL, 0, NULL, NULL },
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/* 034 */ { 0, NULL, 0, NULL, NULL },
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/* 035 */ { WSAEWOULDBLOCK, "Resource temporarily unavailable",
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EWOULDBLOCK, "EWOULDBLOCK", "WSAEWOULDBLOCK" },
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/* 036 */ { WSAEINPROGRESS, "Operation now in progress",
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EINPROGRESS, "EINPROGRESS", "WSAEINPROGRESS" },
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/* 037 */ { WSAEALREADY, "Operation already in progress",
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EALREADY, "EALREADY", "WSAEALREADY" },
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/* 038 */ { WSAENOTSOCK, "Socket operation on non-socket",
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ENOTSOCK, "ENOTSOCK", "WSAENOTSOCK"},
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/* 039 */ { WSAEDESTADDRREQ, "Destination address required",
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EDESTADDRREQ, "EDESTADDRREQ", "WSAEDESTADDRREQ" },
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/* 040 */ { WSAEMSGSIZE, "Message too long",
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EMSGSIZE, "EMSGSIZE", "WSAEMSGSIZE" },
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/* 041 */ { WSAEPROTOTYPE, "Protocol wrong type for socket",
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EPROTOTYPE, "EPROTOTYPE", "WSAEPROTOTYPE" },
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/* 042 */ { WSAENOPROTOOPT, "Bad protocol option",
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ENOPROTOOPT, "ENOPROTOOPT", "WSAENOPROTOOPT" },
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/* 043 */ { WSAEPROTONOSUPPORT, "Protocol not supported",
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EPROTONOSUPPORT, "EPROTONOSUPPORT", "WSAEPROTONOSUPPORT" },
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/* 044 */ { WSAESOCKTNOSUPPORT, "Socket type not supported",
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ESOCKTNOSUPPORT, "ESOCKTNOSUPPORT", "WSAESOCKTNOSUPPORT" },
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/* 045 */ { WSAEOPNOTSUPP, "Operation not supported",
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EOPNOTSUPP, "EOPNOTSUPP", "WSAEOPNOTSUPP" },
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/* 046 */ { WSAEPFNOSUPPORT, "Protocol family not supported",
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EPFNOSUPPORT, "EPFNOSUPPORT", "WSAEPFNOSUPPORT" },
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/* 047 */ { WSAEAFNOSUPPORT,
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"Address family not supported by protocol family",
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EAFNOSUPPORT, "EAFNOSUPPORT", "WSAEAFNOSUPPORT" },
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/* 048 */ { WSAEADDRINUSE, "Address already in use",
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EADDRINUSE, "EADDRINUSE", "WSAEADDRINUSE" },
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/* 049 */ { WSAEADDRNOTAVAIL, "Cannot assign requested address",
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EADDRNOTAVAIL, "EADDRNOTAVAIL", "WSAEADDRNOTAVAIL" },
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/* 050 */ { WSAENETDOWN, "Network is down",
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ENETDOWN, "ENETDOWN", "WSAENETDOWN" },
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/* 051 */ { WSAENETUNREACH, "Network is unreachable",
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ENETUNREACH, "ENETUNREACH", "WSAENETUNREACH" },
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/* 052 */ { WSAENETRESET, "Network dropped connection on reset",
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ENETRESET, "ENETRESET", "WSAENETRESET" },
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/* 053 */ { WSAECONNABORTED, "Software caused connection abort",
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ECONNABORTED, "ECONNABORTED", "WSAECONNABORTED" },
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/* 054 */ { WSAECONNRESET, "Connection reset by peer",
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ECONNRESET, "ECONNRESET", "WSAECONNRESET" },
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/* 055 */ { WSAENOBUFS, "No buffer space available",
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ENOBUFS, "ENOBUFS", "WSAENOBUFS" },
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/* 056 */ { WSAEISCONN, "Socket is already connected",
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EISCONN, "EISCONN", "WSAEISCONN" },
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/* 057 */ { WSAENOTCONN, "Socket is not connected",
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ENOTCONN, "ENOTCONN", "WSAENOTCONN" },
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/* 058 */ { WSAESHUTDOWN, "Cannot send after socket shutdown",
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ESHUTDOWN, "ESHUTDOWN", "WSAESHUTDOWN" },
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/* 059 */ { WSAETOOMANYREFS, "Too many references; can't splice",
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ETOOMANYREFS, "ETOOMANYREFS", "WSAETOOMANYREFS" },
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/* 060 */ { WSAETIMEDOUT, "Connection timed out",
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ETIMEDOUT, "ETIMEDOUT", "WSAETIMEDOUT" },
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/* 061 */ { WSAECONNREFUSED, "Connection refused",
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ECONNREFUSED, "ECONNREFUSED", "WSAECONNREFUSED" },
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/* 062 */ { WSAELOOP, "Too many levels of symbolic links",
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ELOOP, "ELOOP", "WSAELOOP" },
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/* 063 */ { WSAENAMETOOLONG, "File name too long",
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ENAMETOOLONG, NULL, "WSAENAMETOOLONG" },
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/* 064 */ { WSAEHOSTDOWN, "Host is down",
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EHOSTDOWN, "EHOSTDOWN", "WSAEHOSTDOWN" },
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/* 065 */ { WSAEHOSTUNREACH, "No route to host",
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EHOSTUNREACH, "EHOSTUNREACH", "WSAEHOSTUNREACH" },
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/* 066 */ { WSAENOTEMPTY, "Directory not empty",
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ENOTEMPTY, NULL, "WSAENOTEMPTY" },
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/* 067 */ { WSAEPROCLIM, "Too many processes",
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EPROCLIM, "EPROCLIM", "WSAEPROCLIM" },
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/* 068 */ { WSAEUSERS, "Too many users",
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EUSERS, "EUSERS", "WSAEUSERS" },
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/* 069 */ { WSAEDQUOT, "Disc quota exceeded",
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EDQUOT, "EDQUOT", "WSAEDQUOT" },
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/* 070 */ { WSAESTALE, "Stale NFS file handle",
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ESTALE, "ESTALE", "WSAESTALE" },
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/* 071 */ { WSAEREMOTE, "Too many levels of remote in path",
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EREMOTE, "EREMOTE", "WSAEREMOTE" },
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/* 072 */ { 0, NULL, 0, NULL, NULL },
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/* 073 */ { 0, NULL, 0, NULL, NULL },
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/* 074 */ { 0, NULL, 0, NULL, NULL },
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/* 075 */ { 0, NULL, 0, NULL, NULL },
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/* 076 */ { 0, NULL, 0, NULL, NULL },
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/* 077 */ { 0, NULL, 0, NULL, NULL },
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/* 078 */ { 0, NULL, 0, NULL, NULL },
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/* 079 */ { 0, NULL, 0, NULL, NULL },
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/* 080 */ { 0, NULL, 0, NULL, NULL },
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/* 081 */ { 0, NULL, 0, NULL, NULL },
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/* 082 */ { 0, NULL, 0, NULL, NULL },
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/* 083 */ { 0, NULL, 0, NULL, NULL },
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/* 084 */ { 0, NULL, 0, NULL, NULL },
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/* 085 */ { 0, NULL, 0, NULL, NULL },
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/* 086 */ { 0, NULL, 0, NULL, NULL },
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/* 087 */ { 0, NULL, 0, NULL, NULL },
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/* 088 */ { 0, NULL, 0, NULL, NULL },
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/* 089 */ { 0, NULL, 0, NULL, NULL },
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/* 090 */ { 0, NULL, 0, NULL, NULL },
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/* 091 */ { WSASYSNOTREADY, "Network subsystem is unavailable",
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0, NULL, "WSASYSNOTREADY" },
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/* 092 */ { WSAVERNOTSUPPORTED, "WINSOCK.DLL version out of range",
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0, NULL, "WSAVERNOTSUPPORTED" },
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/* 093 */ { WSANOTINITIALISED, "Successful WSAStartup not yet performed",
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0, NULL, "WSANOTINITIALISED" },
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/* 094 */ { 0, NULL, 0, NULL, NULL },
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/* 095 */ { 0, NULL, 0, NULL, NULL },
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/* 096 */ { 0, NULL, 0, NULL, NULL },
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/* 097 */ { 0, NULL, 0, NULL, NULL },
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/* 098 */ { 0, NULL, 0, NULL, NULL },
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/* 099 */ { 0, NULL, 0, NULL, NULL },
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/* 100 */ { 0, NULL, 0, NULL, NULL },
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/* 101 */ { WSAEDISCON, "Graceful shutdown in progress",
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0, NULL, "WSAEDISCON" },
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/* 102 */ { WSAENOMORE, "No more services",
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0, NULL, "WSAENOMORE" },
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/* 103 */ { WSAECANCELLED, "Service lookup cancelled",
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0, NULL, "WSAECANCELLED" },
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/* 104 */ { WSAEINVALIDPROCTABLE, "Invalid procedure call table",
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0, NULL, "WSAEINVALIDPROCTABLE" },
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/* 105 */ { WSAEINVALIDPROVIDER, "Invalid service provider",
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0, NULL, "WSAEINVALIDPROVIDER" },
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/* 106 */ { WSAEPROVIDERFAILEDINIT, "Service provider failure",
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0, NULL, "WSAEPROVIDERFAILEDINIT" },
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/* 107 */ { WSASYSCALLFAILURE, "System call failed",
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0, NULL, "WSASYSCALLFAILURE" },
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/* 108 */ { WSASERVICE_NOT_FOUND, "No such service",
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0, NULL, "WSASERVICE_NOT_FOUND" },
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/* 109 */ { WSATYPE_NOT_FOUND, "Class not found",
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0, NULL, "WSATYPE_NOT_FOUND" },
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/* 110 */ { WSA_E_NO_MORE, "No more services",
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0, NULL, "WSA_E_NO_MORE" },
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/* 111 */ { WSA_E_CANCELLED, "Service lookup cancelled",
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0, NULL, "WSA_E_CANCELLED" },
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/* 112 */ { WSAEREFUSED, "Database query refused",
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0, NULL, "WSAEREFUSED" },
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/* end */ { -1, NULL, -1, NULL, NULL }
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};
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/* Extended list of error structures. */
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static socket_error_t socket_h_errno [] = {
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/* 000 */ { 0, NULL, 0, NULL, NULL },
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/* 001 */ { WSAHOST_NOT_FOUND, "Host not found",
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HOST_NOT_FOUND, "HOST_NOT_FOUND", "WSAHOST_NOT_FOUND" },
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/* 002 */ { WSATRY_AGAIN, "Non-authoritative host not found",
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TRY_AGAIN, "TRY_AGAIN", "WSATRY_AGAIN" },
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/* 003 */ { WSANO_RECOVERY, "This is a non-recoverable error",
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NO_RECOVERY, "NO_RECOVERY", "WSANO_RECOVERY" },
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/* 004 */ { WSANO_DATA, "Valid name, no data record of requested type",
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NO_DATA, "NO_DATA", "WSANO_DATA" },
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/* 005 */ { WSANO_ADDRESS, "No address, look for MX record",
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NO_ADDRESS, "NO_ADDRESS", "WSANO_ADDRESS" },
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/* end */ { -1, NULL, -1, NULL, NULL }
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};
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/* Returns the result of @code{WSAGetLastError()}. */
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int
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scm_i_socket_errno (void)
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{
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return WSAGetLastError ();
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}
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/* Returns a valid error message for Winsock-API error codes obtained via
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@code{WSAGetLastError()} or NULL otherwise. */
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char *
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scm_i_socket_strerror (int error)
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{
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if (error >= WSABASEERR && error <= (WSABASEERR + 112))
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return socket_errno[error - WSABASEERR].str;
|
||
else if (error >= (WSABASEERR + 1000) && error <= (WSABASEERR + 1005))
|
||
return socket_h_errno[error - (WSABASEERR + 1000)].str;
|
||
return NULL;
|
||
}
|
||
|
||
/* Constructs a valid filename for the given file @var{file} in the M$-Windows
|
||
directory. This is usually the default location for the network files. */
|
||
char *
|
||
scm_i_socket_filename (char *file)
|
||
{
|
||
static char dir[PATH_MAX];
|
||
int len = PATH_MAX;
|
||
|
||
len = GetWindowsDirectory (dir, len);
|
||
if (dir[len - 1] != '\\')
|
||
strcat (dir, "\\");
|
||
strcat (dir, file);
|
||
return dir;
|
||
}
|
||
|
||
/* Removes comments and white spaces at end of line and returns a pointer
|
||
to the end of the line. */
|
||
static char *
|
||
scm_i_socket_uncomment (char *line)
|
||
{
|
||
char *end;
|
||
|
||
if ((end = strchr (line, '#')) != NULL)
|
||
*end-- = '\0';
|
||
else
|
||
{
|
||
end = line + strlen (line) - 1;
|
||
while (end > line && (*end == '\r' || *end == '\n'))
|
||
*end-- = '\0';
|
||
}
|
||
while (end > line && isspace ((int) (*end)))
|
||
*end-- = '\0';
|
||
|
||
return end;
|
||
}
|
||
|
||
/* The getservent() function reads the next line from the file `/etc/services'
|
||
and returns a structure servent containing the broken out fields from the
|
||
line. The `/etc/services' file is opened if necessary. */
|
||
struct servent *
|
||
getservent (void)
|
||
{
|
||
char line[MAX_NAMLEN], *end, *p;
|
||
int done = 0, i, n, a;
|
||
struct servent *e = NULL;
|
||
|
||
/* Ensure a open file. */
|
||
if (scm_i_servent.fd == NULL || feof (scm_i_servent.fd))
|
||
{
|
||
setservent (1);
|
||
if (scm_i_servent.fd == NULL)
|
||
return NULL;
|
||
}
|
||
|
||
while (!done)
|
||
{
|
||
/* Get new line. */
|
||
if (fgets (line, MAX_NAMLEN, scm_i_servent.fd) != NULL)
|
||
{
|
||
end = scm_i_socket_uncomment (line);
|
||
|
||
/* Scan the line. */
|
||
if ((i = sscanf (line, "%s %d/%s%n",
|
||
scm_i_servent.name,
|
||
&scm_i_servent.port,
|
||
scm_i_servent.proto, &n)) != 3)
|
||
continue;
|
||
|
||
/* Scan the remaining aliases. */
|
||
p = line + n;
|
||
for (a = 0; a < MAX_ALIASES && p < end && i != -1 && n > 1;
|
||
a++, p += n)
|
||
i = sscanf (p, "%s%n", scm_i_servent.alias[a], &n);
|
||
|
||
/* Prepare the return value. */
|
||
e = &scm_i_servent.ent;
|
||
e->s_name = scm_i_servent.name;
|
||
e->s_port = htons (scm_i_servent.port);
|
||
e->s_proto = scm_i_servent.proto;
|
||
e->s_aliases = scm_i_servent.aliases;
|
||
scm_i_servent.aliases[a] = NULL;
|
||
while (a--)
|
||
scm_i_servent.aliases[a] = scm_i_servent.alias[a];
|
||
done = 1;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
return done ? e : NULL;
|
||
}
|
||
|
||
/* The setservent() function opens and rewinds the `/etc/services' file.
|
||
This file can be set from outside with an environment variable specifying
|
||
the file name. */
|
||
void
|
||
setservent (int stayopen)
|
||
{
|
||
char *file = NULL;
|
||
|
||
endservent ();
|
||
if ((file = getenv (ENVIRON_ETC_SERVICES)) != NULL)
|
||
strcpy (scm_i_servent.file, file);
|
||
else if ((file = scm_i_socket_filename (FILE_ETC_SERVICES)) != NULL)
|
||
strcpy (scm_i_servent.file, file);
|
||
scm_i_servent.fd = fopen (scm_i_servent.file, "rt");
|
||
}
|
||
|
||
/* The endservent() function closes the `/etc/services' file. */
|
||
void
|
||
endservent (void)
|
||
{
|
||
if (scm_i_servent.fd != NULL)
|
||
{
|
||
fclose (scm_i_servent.fd);
|
||
scm_i_servent.fd = NULL;
|
||
}
|
||
}
|
||
|
||
/* The getprotoent() function reads the next line from the file
|
||
`/etc/protocols' and returns a structure protoent containing the broken
|
||
out fields from the line. The `/etc/protocols' file is opened if
|
||
necessary. */
|
||
struct protoent *
|
||
getprotoent (void)
|
||
{
|
||
char line[MAX_NAMLEN], *end, *p;
|
||
int done = 0, i, n, a;
|
||
struct protoent *e = NULL;
|
||
|
||
/* Ensure a open file. */
|
||
if (scm_i_protoent.fd == NULL || feof (scm_i_protoent.fd))
|
||
{
|
||
setprotoent (1);
|
||
if (scm_i_protoent.fd == NULL)
|
||
return NULL;
|
||
}
|
||
|
||
while (!done)
|
||
{
|
||
/* Get new line. */
|
||
if (fgets (line, MAX_NAMLEN, scm_i_protoent.fd) != NULL)
|
||
{
|
||
end = scm_i_socket_uncomment (line);
|
||
|
||
/* Scan the line. */
|
||
if ((i = sscanf (line, "%s %d%n",
|
||
scm_i_protoent.name,
|
||
&scm_i_protoent.proto, &n)) != 2)
|
||
continue;
|
||
|
||
/* Scan the remaining aliases. */
|
||
p = line + n;
|
||
for (a = 0; a < MAX_ALIASES && p < end && i != -1 && n > 1;
|
||
a++, p += n)
|
||
i = sscanf (p, "%s%n", scm_i_protoent.alias[a], &n);
|
||
|
||
/* Prepare the return value. */
|
||
e = &scm_i_protoent.ent;
|
||
e->p_name = scm_i_protoent.name;
|
||
e->p_proto = scm_i_protoent.proto;
|
||
e->p_aliases = scm_i_protoent.aliases;
|
||
scm_i_protoent.aliases[a] = NULL;
|
||
while (a--)
|
||
scm_i_protoent.aliases[a] = scm_i_protoent.alias[a];
|
||
done = 1;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
return done ? e : NULL;
|
||
}
|
||
|
||
/* The setprotoent() function opens and rewinds the `/etc/protocols' file.
|
||
As in setservent() the user can modify the location of the file using
|
||
an environment variable. */
|
||
void
|
||
setprotoent (int stayopen)
|
||
{
|
||
char *file = NULL;
|
||
|
||
endprotoent ();
|
||
if ((file = getenv (ENVIRON_ETC_PROTOCOLS)) != NULL)
|
||
strcpy (scm_i_protoent.file, file);
|
||
else if ((file = scm_i_socket_filename (FILE_ETC_PROTOCOLS)) != NULL)
|
||
strcpy (scm_i_protoent.file, file);
|
||
scm_i_protoent.fd = fopen (scm_i_protoent.file, "rt");
|
||
}
|
||
|
||
/* The endprotoent() function closes `/etc/protocols'. */
|
||
void
|
||
endprotoent (void)
|
||
{
|
||
if (scm_i_protoent.fd != NULL)
|
||
{
|
||
fclose (scm_i_protoent.fd);
|
||
scm_i_protoent.fd = NULL;
|
||
}
|
||
}
|
||
|
||
/* Define both the original and replacement error symbol is possible. Thus
|
||
the user is able to check symbolic errors after unsuccessful networking
|
||
function calls. */
|
||
static void
|
||
scm_socket_symbols_Win32 (socket_error_t * e)
|
||
{
|
||
while (e->error != -1)
|
||
{
|
||
if (e->error)
|
||
{
|
||
if (e->correct_str)
|
||
scm_c_define (e->correct_str, scm_from_int (e->error));
|
||
if (e->replace && e->replace_str)
|
||
scm_c_define (e->replace_str, scm_from_int (e->replace));
|
||
}
|
||
e++;
|
||
}
|
||
}
|
||
|
||
/* Initialize Winsock API under M$-Windows. */
|
||
void
|
||
scm_i_init_socket_Win32 (void)
|
||
{
|
||
scm_socket_symbols_Win32 (socket_errno);
|
||
scm_socket_symbols_Win32 (socket_h_errno);
|
||
}
|