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/*
* hook.c - Hooking Asynchronous Completion
*/
/*
* Copyright (c) 2000,2002 Japan Network Information Center.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set forth bellow.
*
* LICENSE TERMS AND CONDITIONS
*
* The following License Terms and Conditions apply, unless a different
* license is obtained from Japan Network Information Center ("JPNIC"),
* a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda,
* Chiyoda-ku, Tokyo 101-0047, Japan.
*
* 1. Use, Modification and Redistribution (including distribution of any
* modified or derived work) in source and/or binary forms is permitted
* under this License Terms and Conditions.
*
* 2. Redistribution of source code must retain the copyright notices as they
* appear in each source code file, this License Terms and Conditions.
*
* 3. Redistribution in binary form must reproduce the Copyright Notice,
* this License Terms and Conditions, in the documentation and/or other
* materials provided with the distribution. For the purposes of binary
* distribution the "Copyright Notice" refers to the following language:
* "Copyright (c) 2000-2002 Japan Network Information Center. All rights reserved."
*
* 4. The name of JPNIC may not be used to endorse or promote products
* derived from this Software without specific prior written approval of
* JPNIC.
*
* 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JPNIC BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*/
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "wrapcommon.h"
/*
* Hook Managements
*/
static HHOOK hookHandle = NULL ;
typedef struct _HOOK *HOOKPTR;
typedef struct _HOOK {
HOOKPTR prev;
HOOKPTR next;
idn_resconf_t ctx;
HWND hWnd;
u_int wMsg;
char FAR *pBuf;
} HOOKREC;
static HOOKREC hookList = { 0 } ;
static void
hookListInit(void) {
if (hookList.prev == NULL || hookList.next == NULL) {
hookList.prev = &hookList;
hookList.next = &hookList;
}
}
static HOOKPTR
hookListSearch(HWND hWnd, u_int wMsg) {
HOOKPTR hp;
for (hp = hookList.next ; hp != &hookList ; hp = hp->next) {
if (hp->hWnd == hWnd && hp->wMsg == wMsg) {
return (hp);
}
}
return (NULL);
}
static BOOL
hookListAppend(HWND hWnd, u_int wMsg, char FAR *buf, idn_resconf_t ctx) {
HOOKPTR hp, prev, next;
if ((hp = (HOOKPTR)malloc(sizeof(HOOKREC))) == NULL) {
idnPrintf("cannot create hook record\n");
return (FALSE);
}
memset(hp, 0, sizeof(*hp));
hp->ctx = ctx;
hp->hWnd = hWnd;
hp->wMsg = wMsg;
hp->pBuf = buf;
prev = hookList.prev;
next = prev->next;
prev->next = hp;
next->prev = hp;
hp->next = next;
hp->prev = prev;
return (TRUE);
}
static void
hookListDelete(HOOKPTR hp)
{
HOOKPTR prev, next;
prev = hp->prev;
next = hp->next;
prev->next = next;
next->prev = prev;
free(hp);
}
static void
hookListDone(void)
{
HOOKPTR hp;
while ((hp = hookList.next) != &hookList) {
hookListDelete(hp);
}
}
/*
* idnHookInit - initialize Hook Management
*/
void
idnHookInit(void) {
hookListInit();
}
/*
* idnHookDone - finalize Hook Management
*/
void
idnHookDone(void) {
if (hookHandle != NULL) {
UnhookWindowsHookEx(hookHandle);
hookHandle = NULL;
}
hookListDone();
}
/*
* hookProc - hookprocedure, used as WH_GETMESSAGE hook
*/
LRESULT CALLBACK
hookProc(int nCode, WPARAM wParam, LPARAM lParam) {
MSG *pMsg;
HOOKPTR pHook;
struct hostent *pHost;
char nbuff[256];
char hbuff[256];
if (nCode < 0) {
return (CallNextHookEx(hookHandle, nCode, wParam, lParam));
} else if (nCode != HC_ACTION) {
return (0);
}
if ((pMsg = (MSG *)lParam) == NULL) {
return (0);
}
if ((pHook = hookListSearch(pMsg->hwnd, pMsg->message)) == NULL) {
return (0);
}
/*
* Convert the Host Name
*/
pHost = (struct hostent *)pHook->pBuf;
idnPrintf("AsyncComplete Resulting <%s>\n",
dumpName(pHost->h_name, hbuff, sizeof(hbuff)));
if (idnConvRsp(pHook->ctx, pHost->h_name,
nbuff, sizeof(nbuff)) == TRUE) {
idnPrintf("AsyncComplete Converted <%s>\n",
dumpName(nbuff, hbuff, sizeof(hbuff)));
strcpy(pHost->h_name, nbuff);
}
/*
* Delete target
*/
hookListDelete(pHook);
return (0);
}
/*
* idnHook - hook async. completion message
*/
BOOL
idnHook(HWND hWnd, u_int wMsg, char FAR *buf, idn_resconf_t ctx)
{
if (hookHandle == NULL) {
hookHandle = SetWindowsHookEx(WH_GETMESSAGE, hookProc,
NULL, GetCurrentThreadId());
}
if (hookHandle == NULL) {
idnPrintf("idnHook: cannot set hook\n");
return (FALSE);
}
if (hookListAppend(hWnd, wMsg, buf, ctx) != TRUE) {
return (FALSE);
}
return (TRUE);
}
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