wsock/common/checkdll.c

5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews/*
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * checkdll.c - Winsock DLL/IDN processing status
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews/*
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * Copyright (c) 2000,2002 Japan Network Information Center.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * All rights reserved.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * By using this file, you agree to the terms and conditions set forth bellow.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *          LICENSE TERMS AND CONDITIONS
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * The following License Terms and Conditions apply, unless a different
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * license is obtained from Japan Network Information Center ("JPNIC"),
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * Chiyoda-ku, Tokyo 101-0047, Japan.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * 1. Use, Modification and Redistribution (including distribution of any
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    modified or derived work) in source and/or binary forms is permitted
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    under this License Terms and Conditions.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * 2. Redistribution of source code must retain the copyright notices as they
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    appear in each source code file, this License Terms and Conditions.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * 3. Redistribution in binary form must reproduce the Copyright Notice,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    this License Terms and Conditions, in the documentation and/or other
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    materials provided with the distribution.  For the purposes of binary
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    distribution the "Copyright Notice" refers to the following language:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    "Copyright (c) 2000-2002 Japan Network Information Center.  All rights reserved."
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * 4. The name of JPNIC may not be used to endorse or promote products
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    derived from this Software without specific prior written approval of
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    JPNIC.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews * 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL JPNIC BE LIABLE
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews *    ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#include <windows.h>
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#include <stdio.h>
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#include <stdlib.h>
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#include <string.h>
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#include "wrapcommon.h"
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic int winsock_idx;     /* index of winsock_info[] */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic struct winsock_type {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    char *version;      /* winsock version */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    char *name;     /* wrapper DLL name */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    char *original_name;    /* original DLL name */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews} winsock_info[] = {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#define IDN_IDX_WS11 0
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    { "1.1", "WSOCK32", "WSOCK32O" },
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#define IDN_IDX_WS20 1
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    { "2.0", "WS2_32",  "WS2_32O" },
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    { NULL, NULL, NULL },
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews};
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic HINSTANCE    load_original_dll(void);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic BOOL     check_idn_processing(void);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic BOOL     check_dll(const char *name);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark AndrewsBOOL
5c526acb82c882e41b655c31f5fa4425c87b671cMark AndrewsidnWinsockVersion(const char *version) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    int i;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    for (i = 0; winsock_info[i].version != NULL; i++) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        if (strcmp(winsock_info[i].version, version) == 0) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            winsock_idx = i;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            idnLogPrintf(idn_log_level_trace,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                     "idnWinsockVersion: version %s\n",
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                     version);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            return (TRUE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    idnLogPrintf(idn_log_level_fatal,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews             "idnWinsockVersion: unknown winsock version %s\n",
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews             version);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    return (FALSE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews}
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark AndrewsHINSTANCE
5c526acb82c882e41b655c31f5fa4425c87b671cMark AndrewsidnWinsockHandle(void) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    static HINSTANCE dll_handle = NULL;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    static int initialized = 0;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    if (!initialized) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        /* Get the handle of the original winsock DLL */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        idnLogPrintf(idn_log_level_trace,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "idnWinsockHandle: loading original DLL..\n");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        dll_handle = load_original_dll();
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    initialized = 1;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    return (dll_handle);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews}
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsidn_resconf_t
5c526acb82c882e41b655c31f5fa4425c87b671cMark AndrewsidnGetContext(void) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    static int initialized = 0;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    static idn_resconf_t ctx = NULL;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    if (!initialized) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        /*
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews         * Check whether IDN processing should be done
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews         * in this wrapper DLL.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews         */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        idnLogPrintf(idn_log_level_trace,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "idnGetContext: checking IDN status..\n");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        if (check_idn_processing()) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            /* Initialize idnkit */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            ctx = idnConvInit();
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            idnLogPrintf(idn_log_level_info,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                     "Processing context: %08x\n", ctx);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        } else {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            idnLogPrintf(idn_log_level_info,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                     "NOT process IDN here\n");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            ctx = NULL;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        initialized = 1;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    return (ctx);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews}
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic HINSTANCE
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsload_original_dll(void) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    /*
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     * Load Original DLL
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    char dllpath[MAX_PATH];
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    const char *dll_name = winsock_info[winsock_idx].original_name;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    HINSTANCE handle;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    /*
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     * Get idn wrapper's install directory, where the copies of
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     * the original winsock DLLs are saved.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    dllpath[0] = '\0';
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    if (idnGetInstallDir(dllpath, sizeof(dllpath)) != TRUE) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        idnLogPrintf(idn_log_level_fatal,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "idnWinsockHandle: cannot find idn wrapper's "
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "install directory\n");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        abort();
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        return (NULL);  /* for lint */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    /* Strip the trailing backslash. */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    if (dllpath[0] != '\0' &&
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        dllpath[strlen(dllpath) - 1] == '\\') {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        dllpath[strlen(dllpath) - 1] = '\0';
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    /* Is the pathname is insanely long? */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    if (strlen(dllpath) + strlen(dll_name) + 1 + 4 >= sizeof(dllpath)) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        idnLogPrintf(idn_log_level_fatal,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "idnWinsockHandle: idn wrapper's install path is "
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "too long to be true\n");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        abort();
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        return (NULL);  /* for lint */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    /* Append the DLL name to form a full pathname of the DLL. */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    strcat(dllpath, "\\");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    strcat(dllpath, dll_name);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    strcat(dllpath, ".DLL");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    idnLogPrintf(idn_log_level_trace,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews             "idnWinsockHandle: loading original winsock DLL (%s)\n",
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews             dllpath);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    if ((handle = LoadLibrary(dllpath)) == NULL) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        idnLogPrintf(idn_log_level_fatal,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "idnWinsockHandle: no DLL %-.100s\n", dllpath);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        abort();
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        return (NULL);  /* font lint */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    return (handle);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews}
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic BOOL
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewscheck_idn_processing(void) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    int where = idnEncodeWhere();
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    BOOL here = FALSE;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    idnLogPrintf(idn_log_level_trace,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews             "idnGetContext: Winsock%s, where=%d\n",
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews             winsock_info[winsock_idx].version, where);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    switch (winsock_idx) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    case IDN_IDX_WS11:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        switch (where) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        case IDN_ENCODE_ALWAYS:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        case IDN_ENCODE_ONLY11:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            return (TRUE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        case IDN_ENCODE_CHECK:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            if (!check_dll(winsock_info[winsock_idx].name)) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                return (TRUE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            break;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        break;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    case IDN_IDX_WS20:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        switch (where) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        case IDN_ENCODE_ALWAYS:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        case IDN_ENCODE_ONLY20:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        case IDN_ENCODE_CHECK:
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            return (TRUE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews            break;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        break;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    return (FALSE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews}
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewsstatic BOOL
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrewscheck_dll(const char *name) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    HINSTANCE hdll = NULL;
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#if 1
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    hdll = LoadLibrary(name);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#else
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    /*
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     * Just check the existence of the named DLL, without taking
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     * the trouble of calling DllMain.
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews     */
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    hdll = LoadLibraryEx(name, NULL, LOAD_LIBRARY_AS_DATAFILE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews#endif
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    if (hdll == NULL) {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        idnLogPrintf(idn_log_level_trace,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "idnGetContext: DLL %s does not exist\n");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        return (FALSE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    } else {
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        idnLogPrintf(idn_log_level_trace,
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews                 "idnGetContext: DLL %s exists\n");
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        FreeLibrary(hdll);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews        return (TRUE);
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews    }
5c526acb82c882e41b655c31f5fa4425c87b671cMark Andrews}