Jack Jansen | edf5855 | 1994-12-14 13:36:34 +0000 | [diff] [blame] | 1 | /* DNR.c - DNR library for MPW |
| 2 | |
| 3 | (c) Copyright 1988 by Apple Computer. All rights reserved |
| 4 | |
| 5 | Modifications by Jim Matthews, Dartmouth College, 5/91 |
| 6 | Again modified for use with python by Jack Jansen, CWI, October 1994. |
| 7 | |
| 8 | */ |
| 9 | |
| 10 | #include <Traps.h> |
| 11 | #include <OSUtils.h> |
| 12 | #include <Errors.h> |
| 13 | #include <Files.h> |
| 14 | #include <Resources.h> |
| 15 | #include <Memory.h> |
| 16 | #include <Traps.h> |
| 17 | #include <GestaltEqu.h> |
| 18 | #include <Folders.h> |
| 19 | #include <ToolUtils.h> |
| 20 | #include <MacTCPCommonTypes.h> |
| 21 | #include "AddressXlation.h" |
| 22 | |
| 23 | TrapType GetTrapType(unsigned long theTrap); |
| 24 | Boolean TrapAvailable(unsigned long trap); |
| 25 | void GetSystemFolder(short *vRefNumP, long *dirIDP); |
| 26 | void GetCPanelFolder(short *vRefNumP, long *dirIDP); |
| 27 | short SearchFolderForDNRP(long targetType, long targetCreator, short vRefNum, long dirID); |
| 28 | short OpenOurRF(void); |
| 29 | |
| 30 | #define OPENRESOLVER 1L |
| 31 | #define CLOSERESOLVER 2L |
| 32 | #define STRTOADDR 3L |
| 33 | #define ADDRTOSTR 4L |
| 34 | #define ENUMCACHE 5L |
| 35 | #define ADDRTONAME 6L |
| 36 | #define HINFO 7L |
| 37 | #define MXINFO 8L |
| 38 | |
| 39 | Handle codeHndl = nil; |
| 40 | |
| 41 | OSErrProcPtr dnr = nil; |
| 42 | |
| 43 | TrapType GetTrapType(theTrap) |
| 44 | unsigned long theTrap; |
| 45 | { |
| 46 | if (BitAnd(theTrap, 0x0800) > 0) |
| 47 | return(ToolTrap); |
| 48 | else |
| 49 | return(OSTrap); |
| 50 | } |
| 51 | |
| 52 | Boolean TrapAvailable(trap) |
| 53 | unsigned long trap; |
| 54 | { |
| 55 | TrapType trapType = ToolTrap; |
| 56 | unsigned long numToolBoxTraps; |
| 57 | |
| 58 | if (NGetTrapAddress(_InitGraf, ToolTrap) == NGetTrapAddress(0xAA6E, ToolTrap)) |
| 59 | numToolBoxTraps = 0x200; |
| 60 | else |
| 61 | numToolBoxTraps = 0x400; |
| 62 | |
| 63 | trapType = GetTrapType(trap); |
| 64 | if (trapType == ToolTrap) { |
| 65 | trap = BitAnd(trap, 0x07FF); |
| 66 | if (trap >= numToolBoxTraps) |
| 67 | trap = _Unimplemented; |
| 68 | } |
| 69 | return(NGetTrapAddress(trap, trapType) != NGetTrapAddress(_Unimplemented, ToolTrap)); |
| 70 | |
| 71 | } |
| 72 | |
| 73 | void GetSystemFolder(short *vRefNumP, long *dirIDP) |
| 74 | { |
| 75 | SysEnvRec info; |
| 76 | long wdProcID; |
| 77 | |
| 78 | SysEnvirons(1, &info); |
| 79 | if (GetWDInfo(info.sysVRefNum, vRefNumP, dirIDP, &wdProcID) != noErr) { |
| 80 | *vRefNumP = 0; |
| 81 | *dirIDP = 0; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | void GetCPanelFolder(short *vRefNumP, long *dirIDP) |
| 86 | { |
| 87 | Boolean hasFolderMgr = false; |
| 88 | long feature; |
| 89 | |
| 90 | if (Gestalt(gestaltFindFolderAttr, &feature) == noErr) hasFolderMgr = true; |
| 91 | if (!hasFolderMgr) { |
| 92 | GetSystemFolder(vRefNumP, dirIDP); |
| 93 | return; |
| 94 | } |
| 95 | else { |
| 96 | if (FindFolder(kOnSystemDisk, kControlPanelFolderType, kDontCreateFolder, vRefNumP, dirIDP) != noErr) { |
| 97 | *vRefNumP = 0; |
| 98 | *dirIDP = 0; |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | /* SearchFolderForDNRP is called to search a folder for files that might |
| 104 | contain the 'dnrp' resource */ |
| 105 | short SearchFolderForDNRP(long targetType, long targetCreator, short vRefNum, long dirID) |
| 106 | { |
| 107 | HParamBlockRec fi; |
| 108 | Str255 filename; |
| 109 | short refnum; |
| 110 | |
| 111 | fi.fileParam.ioCompletion = nil; |
| 112 | fi.fileParam.ioNamePtr = filename; |
| 113 | fi.fileParam.ioVRefNum = vRefNum; |
| 114 | fi.fileParam.ioDirID = dirID; |
| 115 | fi.fileParam.ioFDirIndex = 1; |
| 116 | |
| 117 | while (PBHGetFInfo(&fi, false) == noErr) { |
| 118 | /* scan system folder for driver resource files of specific type & creator */ |
| 119 | if (fi.fileParam.ioFlFndrInfo.fdType == targetType && |
| 120 | fi.fileParam.ioFlFndrInfo.fdCreator == targetCreator) { |
| 121 | /* found the MacTCP driver file? */ |
| 122 | refnum = HOpenResFile(vRefNum, dirID, filename, fsRdPerm); |
| 123 | if (GetIndResource('dnrp', 1) == NULL) |
| 124 | CloseResFile(refnum); |
| 125 | else |
| 126 | return refnum; |
| 127 | } |
| 128 | /* check next file in system folder */ |
| 129 | fi.fileParam.ioFDirIndex++; |
| 130 | fi.fileParam.ioDirID = dirID; /* PBHGetFInfo() clobbers ioDirID */ |
| 131 | } |
| 132 | return(-1); |
| 133 | } |
| 134 | |
| 135 | /* OpenOurRF is called to open the MacTCP driver resources */ |
| 136 | |
| 137 | short OpenOurRF() |
| 138 | { |
| 139 | short refnum; |
| 140 | short vRefNum; |
| 141 | long dirID; |
| 142 | |
| 143 | /* first search Control Panels for MacTCP 1.1 */ |
| 144 | GetCPanelFolder(&vRefNum, &dirID); |
| 145 | refnum = SearchFolderForDNRP('cdev', 'ztcp', vRefNum, dirID); |
| 146 | if (refnum != -1) return(refnum); |
| 147 | |
| 148 | /* next search System Folder for MacTCP 1.0.x */ |
| 149 | GetSystemFolder(&vRefNum, &dirID); |
| 150 | refnum = SearchFolderForDNRP('cdev', 'mtcp', vRefNum, dirID); |
| 151 | if (refnum != -1) return(refnum); |
| 152 | |
| 153 | /* finally, search Control Panels for MacTCP 1.0.x */ |
| 154 | GetCPanelFolder(&vRefNum, &dirID); |
| 155 | refnum = SearchFolderForDNRP('cdev', 'mtcp', vRefNum, dirID); |
| 156 | if (refnum != -1) return(refnum); |
| 157 | |
| 158 | return -1; |
| 159 | } |
| 160 | |
| 161 | |
| 162 | OSErr OpenResolver(fileName) |
| 163 | char *fileName; |
| 164 | { |
| 165 | short refnum; |
| 166 | OSErr rc; |
| 167 | |
| 168 | if (dnr != nil) |
| 169 | /* resolver already loaded in */ |
| 170 | return(noErr); |
| 171 | |
| 172 | /* open the MacTCP driver to get DNR resources. Search for it based on |
| 173 | creator & type rather than simply file name */ |
| 174 | refnum = OpenOurRF(); |
| 175 | |
| 176 | /* ignore failures since the resource may have been installed in the |
| 177 | System file if running on a Mac 512Ke */ |
| 178 | |
| 179 | /* load in the DNR resource package */ |
| 180 | codeHndl = GetIndResource('dnrp', 1); |
| 181 | if (codeHndl == nil) { |
| 182 | /* can't open DNR */ |
| 183 | return(ResError()); |
| 184 | } |
| 185 | |
| 186 | DetachResource(codeHndl); |
| 187 | if (refnum != -1) { |
| 188 | CloseWD(refnum); |
| 189 | CloseResFile(refnum); |
| 190 | } |
| 191 | |
| 192 | /* lock the DNR resource since it cannot be reloated while opened */ |
| 193 | HLock(codeHndl); |
| 194 | dnr = (OSErrProcPtr) *codeHndl; |
| 195 | |
| 196 | /* call open resolver */ |
| 197 | rc = (*dnr)(OPENRESOLVER, fileName); |
| 198 | if (rc != noErr) { |
| 199 | /* problem with open resolver, flush it */ |
| 200 | HUnlock(codeHndl); |
| 201 | DisposHandle(codeHndl); |
| 202 | dnr = nil; |
| 203 | } |
| 204 | return(rc); |
| 205 | } |
| 206 | |
| 207 | |
| 208 | OSErr CloseResolver() |
| 209 | { |
| 210 | if (dnr == nil) |
| 211 | /* resolver not loaded error */ |
| 212 | return(notOpenErr); |
| 213 | |
| 214 | /* call close resolver */ |
| 215 | (void) (*dnr)(CLOSERESOLVER); |
| 216 | |
| 217 | /* release the DNR resource package */ |
| 218 | HUnlock(codeHndl); |
| 219 | DisposHandle(codeHndl); |
| 220 | dnr = nil; |
| 221 | return(noErr); |
| 222 | } |
| 223 | |
| 224 | OSErr StrToAddr(hostName, rtnStruct, resultproc, userDataPtr) |
| 225 | char *hostName; |
| 226 | struct hostInfo *rtnStruct; |
| 227 | ResultProcPtr resultproc; |
| 228 | char *userDataPtr; |
| 229 | { |
| 230 | if (dnr == nil) |
| 231 | /* resolver not loaded error */ |
| 232 | return(notOpenErr); |
| 233 | |
| 234 | return((*dnr)(STRTOADDR, hostName, rtnStruct, resultproc, userDataPtr)); |
| 235 | } |
| 236 | |
| 237 | OSErr AddrToStr(addr, addrStr) |
| 238 | unsigned long addr; |
| 239 | char *addrStr; |
| 240 | { |
| 241 | if (dnr == nil) |
| 242 | /* resolver not loaded error */ |
| 243 | return(notOpenErr); |
| 244 | |
| 245 | (*dnr)(ADDRTOSTR, addr, addrStr); |
| 246 | return(noErr); |
| 247 | } |
| 248 | |
| 249 | OSErr EnumCache(resultproc, userDataPtr) |
| 250 | EnumResultProcPtr resultproc; |
| 251 | char *userDataPtr; |
| 252 | { |
| 253 | if (dnr == nil) |
| 254 | /* resolver not loaded error */ |
| 255 | return(notOpenErr); |
| 256 | |
| 257 | return((*dnr)(ENUMCACHE, resultproc, userDataPtr)); |
| 258 | } |
| 259 | |
| 260 | |
| 261 | OSErr AddrToName(addr, rtnStruct, resultproc, userDataPtr) |
| 262 | unsigned long addr; |
| 263 | struct hostInfo *rtnStruct; |
| 264 | ResultProcPtr resultproc; |
| 265 | char *userDataPtr; |
| 266 | { |
| 267 | if (dnr == nil) |
| 268 | /* resolver not loaded error */ |
| 269 | return(notOpenErr); |
| 270 | |
| 271 | return((*dnr)(ADDRTONAME, addr, rtnStruct, resultproc, userDataPtr)); |
| 272 | } |
| 273 | |
| 274 | |
| 275 | extern OSErr HInfo(hostName, returnRecPtr, resultProc, userDataPtr) |
| 276 | char *hostName; |
| 277 | struct returnRec *returnRecPtr; |
| 278 | ResultProc2Ptr resultProc; |
| 279 | char *userDataPtr; |
| 280 | { |
| 281 | if (dnr == nil) |
| 282 | /* resolver not loaded error */ |
| 283 | return(notOpenErr); |
| 284 | |
| 285 | return((*dnr)(HINFO, hostName, returnRecPtr, resultProc, userDataPtr)); |
| 286 | |
| 287 | } |
| 288 | |
| 289 | extern OSErr MXInfo(hostName, returnRecPtr, resultProc, userDataPtr) |
| 290 | char *hostName; |
| 291 | struct returnRec *returnRecPtr; |
| 292 | ResultProc2Ptr resultProc; |
| 293 | char *userDataPtr; |
| 294 | { |
| 295 | if (dnr == nil) |
| 296 | /* resolver not loaded error */ |
| 297 | return(notOpenErr); |
| 298 | |
| 299 | return((*dnr)(MXINFO, hostName, returnRecPtr, resultProc, userDataPtr)); |
| 300 | |
| 301 | } |