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- /*
-
- File: DNR.c
-
- Contains: DNR library for MPW
-
- Copyright: © 1989-1995 by Apple Computer, Inc., all rights reserved
-
- Version: Technology: Networking
- Package: Use with MacTCP 2.0.6 and the Universal
- Interfaces 2.1b1
-
- Change History (most recent first):
- <3> 1/23/95 rrk implemented use of universal procptrs
- Changed selector name HINFO to HXINFO
- due to conflict of name in MacTCP header
- Removed use of TrapAvailable and exchanged
- for the TrapExists call.
- Changed symbol codeHandle to gDNRCodeHndl
- Changed symbol dnr to gDNRCodePtr
- Further modifications by Steve Falkenburg, Apple MacDTS 8/91
- Modifications by Jim Matthews, Dartmouth College, 5/91
-
-
- */
-
- #ifndef __OSUTILS__
- #include <OSUtils.h>
- #endif
-
- #ifndef __ERRORS__
- #include <Errors.h>
- #endif
-
- #ifndef __FILES__
- #include <Files.h>
- #endif
-
- #ifndef __RESOURCES__
- #include <Resources.h>
- #endif
-
- #ifndef __MEMORY__
- #include <Memory.h>
- #endif
-
- #ifndef __TRAPS__
- #include <Traps.h>
- #endif
-
- #ifndef __GESTALTEQU__
- #include <GestaltEqu.h>
- #endif
-
- #ifndef __FOLDERS__
- #include <Folders.h>
- #endif
-
- #ifndef __TOOLUTILS__
- #include <ToolUtils.h>
- #endif
-
-
- #ifndef __MACTCP__
- #include "MacTCP.h"
- #endif
-
- #ifndef __ADDRESSXLATION__
- #include "AddressXlation.h"
- #endif
-
- // think C compatibility stuff
-
- #ifndef _GestaltDispatch
- #define _GestaltDispatch _Gestalt
- #endif
-
-
- /* RRK Modification 1/95 - commenting out the following defines as they are
- defined in the DNRCalls.h header file
- */
-
- 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);
- short NumToolboxTraps(void);
- TrapType GetTrapType(short theTrap);
- Boolean TrapExists(short theTrap);
-
- static Handle gDNRCodeHndl = nil;
- static ProcPtr gDNRCodePtr = nil;
-
- /* Check the bits of a trap number to determine its type. */
-
- /* InitGraf is always implemented (trap $A86E). If the trap table is big
- ** enough, trap $AA6E will always point to either Unimplemented or some other
- ** trap, but will never be the same as InitGraf. Thus, you can check the size
- ** of the trap table by asking if the address of trap $A86E is the same as
- ** $AA6E. */
-
- #pragma segment UtilMain
- short NumToolboxTraps(void)
- {
- if (NGetTrapAddress(_InitGraf, ToolTrap) == NGetTrapAddress(0xAA6E, ToolTrap))
- return(0x200);
- else
- return(0x400);
- }
-
- #pragma segment UtilMain
- TrapType GetTrapType(short theTrap)
- {
- /* OS traps start with A0, Tool with A8 or AA. */
- if ((theTrap & 0x0800) == 0) /* per D.A. */
- return(OSTrap);
- else
- return(ToolTrap);
- }
-
- Boolean TrapExists(short theTrap)
- {
- TrapType theTrapType;
-
- theTrapType = GetTrapType(theTrap);
- if ((theTrapType == ToolTrap) && ((theTrap &= 0x07FF) >= NumToolboxTraps()))
- theTrap = _Unimplemented;
-
- return(NGetTrapAddress(_Unimplemented, ToolTrap) != NGetTrapAddress(theTrap, theTrapType));
- }
-
- 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 (TrapExists(_GestaltDispatch)) 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(void)
- {
- 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(char *fileName)
- {
- short refnum;
- OSErr rc;
-
- if (gDNRCodePtr != 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 */
- gDNRCodeHndl = GetIndResource('dnrp', 1);
- if (gDNRCodeHndl == nil)
- {
- /* can't open DNR */
- return(ResError());
- }
-
- DetachResource(gDNRCodeHndl);
- if (refnum != -1)
- {
- CloseResFile(refnum);
- }
-
- /* lock the DNR resource since it cannot be reloated while opened */
- MoveHHi(gDNRCodeHndl);
- HLock(gDNRCodeHndl);
-
- gDNRCodePtr = (ProcPtr)*gDNRCodeHndl;
-
- /* call open resolver */
- // RRK modification 1/95 use CallOpenResolverProc define to call UPP
-
- rc = CallOpenResolverProc(gDNRCodePtr, OPENRESOLVER, fileName);
- if (rc != noErr)
- {
- /* problem with open resolver, flush it */
- HUnlock(gDNRCodeHndl);
- DisposeHandle(gDNRCodeHndl);
- gDNRCodePtr = nil;
- }
- return(rc);
- }
-
-
- OSErr CloseResolver(void)
- {
-
- if (gDNRCodePtr == nil)
- /* resolver not loaded error */
- return(notOpenErr);
-
- /* call close resolver */
- // RRK modification 1/95 use CallCloseResolverProc define to call UPP
- // (void) (*dnr)(CLOSERESOLVER);
-
- CallCloseResolverProc(gDNRCodePtr, CLOSERESOLVER);
-
- /* release the DNR resource package */
- HUnlock(gDNRCodeHndl);
- DisposeHandle(gDNRCodeHndl);
- gDNRCodePtr = nil;
- return(noErr);
- }
-
- // RRK modification 1/95 declare parameter resultProc to be of type
- // ResultProcUPP instead of a long
-
- OSErr StrToAddr(char *hostName, struct hostInfo *rtnStruct,
- ResultUPP resultproc, Ptr userDataPtr)
- {
- if (gDNRCodePtr == nil)
- /* resolver not loaded error */
- return(notOpenErr);
-
- // RRK modification 1/95 use CallStrToAddrProc define to call UPP
- // return((*dnr)(STRTOADDR, hostName, rtnStruct, resultproc, userDataPtr));
-
- return (CallStrToAddrProc(gDNRCodePtr, STRTOADDR, hostName, rtnStruct, resultproc, userDataPtr));
- }
-
- OSErr AddrToStr(unsigned long addr, char *addrStr)
- {
- OSErr err;
- if (gDNRCodePtr == nil)
- /* resolver not loaded error */
- return(notOpenErr);
-
- // RRK modification 1/95 use CallAddrToStrProc define to call UPP
- // (*dnr)(ADDRTOSTR, addr, addrStr);
-
- err = CallAddrToStrProc(gDNRCodePtr, ADDRTOSTR, addr, addrStr);
- return(noErr);
- }
-
- OSErr EnumCache(EnumResultUPP resultproc, Ptr userDataPtr)
- {
-
- if (gDNRCodePtr == nil)
- /* resolver not loaded error */
- return(notOpenErr);
-
- // RRK modification 1/95 use CallEnumCacheProc define to call UPP
- // return((*dnr)(ENUMCACHE, resultproc, userDataPtr));
-
- return (CallEnumCacheProc(gDNRCodePtr, ENUMCACHE, resultproc, userDataPtr));
- }
-
-
- OSErr AddrToName(unsigned long addr, struct hostInfo *rtnStruct,
- ResultUPP resultproc, Ptr userDataPtr)
- {
- if (gDNRCodePtr == nil)
- /* resolver not loaded error */
- return(notOpenErr);
-
- // RRK modification 1/95 use CallAddrToNameProc define to call UPP
- // return((*dnr)(ADDRTONAME, addr, rtnStruct, resultproc, userDataPtr));
-
- return(CallAddrToNameProc(gDNRCodePtr, ADDRTONAME, addr, rtnStruct, resultproc, userDataPtr));
- }
-
-
- extern OSErr HInfo(char *hostName, struct returnRec *returnRecPtr,
- ResultProc2UPP resultProc, Ptr userDataPtr)
- {
- if (gDNRCodePtr == nil)
- /* resolver not loaded error */
- return(notOpenErr);
-
- // RRK modification 1/95 use CallHInfoProc define to call UPP
- // return((*dnr)(HINFO, hostName, returnRecPtr, resultProc, userDataPtr));
-
- return(CallHInfoProc(gDNRCodePtr, HXINFO, hostName, returnRecPtr, resultProc, userDataPtr));
-
- }
-
- extern OSErr MXInfo(char *hostName, struct returnRec *returnRecPtr,
- ResultProc2UPP resultProc, Ptr userDataPtr)
- {
- if (gDNRCodePtr == nil)
- /* resolver not loaded error */
- return(notOpenErr);
-
- // RRK modification 1/95 use CallHInfoProc define to call UPP
- // return((*dnr)(MXINFO, hostName, returnRecPtr, resultProc, userDataPtr));
-
- return(CallMXInfoProc(gDNRCodePtr, MXINFO, hostName, returnRecPtr, resultProc, userDataPtr));
-
- } /* removed ; (causes syntax err in Think C 5.0 */
-