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/* DNR.c - DNR library for MPW
(c) Copyright 1988 by Apple Computer. All rights reserved
Modifications by Jim Matthews, Dartmouth College, 5/91
Again modified for use with python by Jack Jansen, CWI, October 1994.
*/
#include <Traps.h>
#include <OSUtils.h>
#include <Errors.h>
#include <Files.h>
#include <Resources.h>
#include <Memory.h>
#include <Traps.h>
#include <GestaltEqu.h>
#include <Folders.h>
#include <ToolUtils.h>
#include <MacTCPCommonTypes.h>
#include "AddressXlation.h"
TrapType GetTrapType(unsigned long theTrap);
Boolean TrapAvailable(unsigned long trap);
void GetSystemFolder(short *vRefNumP, long *dirIDP);
void GetCPanelFolder(short *vRefNumP, long *dirIDP);
short SearchFolderForDNRP(long targetType, long targetCreator, short vRefNum, long dirID);
short OpenOurRF(void);
#define OPENRESOLVER 1L
#define CLOSERESOLVER 2L
#define STRTOADDR 3L
#define ADDRTOSTR 4L
#define ENUMCACHE 5L
#define ADDRTONAME 6L
#define HINFO 7L
#define MXINFO 8L
Handle codeHndl = nil;
OSErrProcPtr dnr = nil;
TrapType GetTrapType(theTrap)
unsigned long theTrap;
{
if (BitAnd(theTrap, 0x0800) > 0)
return(ToolTrap);
else
return(OSTrap);
}
Boolean TrapAvailable(trap)
unsigned long trap;
{
TrapType trapType = ToolTrap;
unsigned long numToolBoxTraps;
if (NGetTrapAddress(_InitGraf, ToolTrap) == NGetTrapAddress(0xAA6E, ToolTrap))
numToolBoxTraps = 0x200;
else
numToolBoxTraps = 0x400;
trapType = GetTrapType(trap);
if (trapType == ToolTrap) {
trap = BitAnd(trap, 0x07FF);
if (trap >= numToolBoxTraps)
trap = _Unimplemented;
}
return(NGetTrapAddress(trap, trapType) != NGetTrapAddress(_Unimplemented, ToolTrap));
}
void GetSystemFolder(short *vRefNumP, long *dirIDP)
{
SysEnvRec info;
long wdProcID;
SysEnvirons(1, &info);
if (GetWDInfo(info.sysVRefNum, vRefNumP, dirIDP, &wdProcID) != noErr) {
*vRefNumP = 0;
*dirIDP = 0;
}
}
void GetCPanelFolder(short *vRefNumP, long *dirIDP)
{
Boolean hasFolderMgr = false;
long feature;
if (Gestalt(gestaltFindFolderAttr, &feature) == noErr) hasFolderMgr = true;
if (!hasFolderMgr) {
GetSystemFolder(vRefNumP, dirIDP);
return;
}
else {
if (FindFolder(kOnSystemDisk, kControlPanelFolderType, kDontCreateFolder, vRefNumP, dirIDP) != noErr) {
*vRefNumP = 0;
*dirIDP = 0;
}
}
}
/* SearchFolderForDNRP is called to search a folder for files that might
contain the 'dnrp' resource */
short SearchFolderForDNRP(long targetType, long targetCreator, short vRefNum, long dirID)
{
HParamBlockRec fi;
Str255 filename;
short refnum;
fi.fileParam.ioCompletion = nil;
fi.fileParam.ioNamePtr = filename;
fi.fileParam.ioVRefNum = vRefNum;
fi.fileParam.ioDirID = dirID;
fi.fileParam.ioFDirIndex = 1;
while (PBHGetFInfo(&fi, false) == noErr) {
/* scan system folder for driver resource files of specific type & creator */
if (fi.fileParam.ioFlFndrInfo.fdType == targetType &&
fi.fileParam.ioFlFndrInfo.fdCreator == targetCreator) {
/* found the MacTCP driver file? */
refnum = HOpenResFile(vRefNum, dirID, filename, fsRdPerm);
if (GetIndResource('dnrp', 1) == NULL)
CloseResFile(refnum);
else
return refnum;
}
/* check next file in system folder */
fi.fileParam.ioFDirIndex++;
fi.fileParam.ioDirID = dirID; /* PBHGetFInfo() clobbers ioDirID */
}
return(-1);
}
/* OpenOurRF is called to open the MacTCP driver resources */
short OpenOurRF()
{
short refnum;
short vRefNum;
long dirID;
/* first search Control Panels for MacTCP 1.1 */
GetCPanelFolder(&vRefNum, &dirID);
refnum = SearchFolderForDNRP('cdev', 'ztcp', vRefNum, dirID);
if (refnum != -1) return(refnum);
/* next search System Folder for MacTCP 1.0.x */
GetSystemFolder(&vRefNum, &dirID);
refnum = SearchFolderForDNRP('cdev', 'mtcp', vRefNum, dirID);
if (refnum != -1) return(refnum);
/* finally, search Control Panels for MacTCP 1.0.x */
GetCPanelFolder(&vRefNum, &dirID);
refnum = SearchFolderForDNRP('cdev', 'mtcp', vRefNum, dirID);
if (refnum != -1) return(refnum);
return -1;
}
OSErr OpenResolver(fileName)
char *fileName;
{
short refnum;
OSErr rc;
if (dnr != nil)
/* resolver already loaded in */
return(noErr);
/* open the MacTCP driver to get DNR resources. Search for it based on
creator & type rather than simply file name */
refnum = OpenOurRF();
/* ignore failures since the resource may have been installed in the
System file if running on a Mac 512Ke */
/* load in the DNR resource package */
codeHndl = GetIndResource('dnrp', 1);
if (codeHndl == nil) {
/* can't open DNR */
return(ResError());
}
DetachResource(codeHndl);
if (refnum != -1) {
CloseWD(refnum);
CloseResFile(refnum);
}
/* lock the DNR resource since it cannot be reloated while opened */
HLock(codeHndl);
dnr = (OSErrProcPtr) *codeHndl;
/* call open resolver */
rc = (*dnr)(OPENRESOLVER, fileName);
if (rc != noErr) {
/* problem with open resolver, flush it */
HUnlock(codeHndl);
DisposHandle(codeHndl);
dnr = nil;
}
return(rc);
}
OSErr CloseResolver()
{
if (dnr == nil)
/* resolver not loaded error */
return(notOpenErr);
/* call close resolver */
(void) (*dnr)(CLOSERESOLVER);
/* release the DNR resource package */
HUnlock(codeHndl);
DisposHandle(codeHndl);
dnr = nil;
return(noErr);
}
OSErr StrToAddr(hostName, rtnStruct, resultproc, userDataPtr)
char *hostName;
struct hostInfo *rtnStruct;
ResultProcPtr resultproc;
char *userDataPtr;
{
if (dnr == nil)
/* resolver not loaded error */
return(notOpenErr);
return((*dnr)(STRTOADDR, hostName, rtnStruct, resultproc, userDataPtr));
}
OSErr AddrToStr(addr, addrStr)
unsigned long addr;
char *addrStr;
{
if (dnr == nil)
/* resolver not loaded error */
return(notOpenErr);
(*dnr)(ADDRTOSTR, addr, addrStr);
return(noErr);
}
OSErr EnumCache(resultproc, userDataPtr)
EnumResultProcPtr resultproc;
char *userDataPtr;
{
if (dnr == nil)
/* resolver not loaded error */
return(notOpenErr);
return((*dnr)(ENUMCACHE, resultproc, userDataPtr));
}
OSErr AddrToName(addr, rtnStruct, resultproc, userDataPtr)
unsigned long addr;
struct hostInfo *rtnStruct;
ResultProcPtr resultproc;
char *userDataPtr;
{
if (dnr == nil)
/* resolver not loaded error */
return(notOpenErr);
return((*dnr)(ADDRTONAME, addr, rtnStruct, resultproc, userDataPtr));
}
extern OSErr HInfo(hostName, returnRecPtr, resultProc, userDataPtr)
char *hostName;
struct returnRec *returnRecPtr;
ResultProc2Ptr resultProc;
char *userDataPtr;
{
if (dnr == nil)
/* resolver not loaded error */
return(notOpenErr);
return((*dnr)(HINFO, hostName, returnRecPtr, resultProc, userDataPtr));
}
extern OSErr MXInfo(hostName, returnRecPtr, resultProc, userDataPtr)
char *hostName;
struct returnRec *returnRecPtr;
ResultProc2Ptr resultProc;
char *userDataPtr;
{
if (dnr == nil)
/* resolver not loaded error */
return(notOpenErr);
return((*dnr)(MXINFO, hostName, returnRecPtr, resultProc, userDataPtr));
}
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