193194e2 |
1 | /* |
2 | * Copyright (c) 2003 Ben Harris |
3 | * All rights reserved. |
4 | * |
5 | * Permission is hereby granted, free of charge, to any person |
6 | * obtaining a copy of this software and associated documentation |
7 | * files (the "Software"), to deal in the Software without |
8 | * restriction, including without limitation the rights to use, |
9 | * copy, modify, merge, publish, distribute, sublicense, and/or |
10 | * sell copies of the Software, and to permit persons to whom the |
11 | * Software is furnished to do so, subject to the following |
12 | * conditions: |
13 | * |
14 | * The above copyright notice and this permission notice shall be |
15 | * included in all copies or substantial portions of the Software. |
16 | * |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR |
21 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF |
22 | * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
23 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
24 | * SOFTWARE. |
25 | */ |
26 | /* |
27 | * mtcpnet.c - MacTCP interface |
28 | */ |
29 | |
30 | #include <MacTypes.h> |
31 | #include <Devices.h> |
32 | #include <Endian.h> |
33 | #include <Folders.h> |
34 | #include <MacTCP.h> |
35 | #include <MixedMode.h> |
36 | #include <Resources.h> |
37 | |
38 | #include <assert.h> |
39 | |
40 | #include "putty.h" |
41 | #include "network.h" |
42 | #include "mac.h" |
43 | |
44 | /* |
45 | * The following structures are documented as being in |
46 | * <AddressXlation.h>, but that isn't shipped with Universal |
47 | * Interfaces, and it's easier to define them here than to require |
48 | * people to download yet another SDK. |
49 | */ |
50 | |
51 | static OSErr OpenResolver(char *); |
52 | static OSErr CloseResolver(void); |
53 | |
54 | enum { |
55 | OPENRESOLVER = 1, |
56 | CLOSERESOLVER, |
57 | STRTOADDR, |
58 | ADDRTOSTR, |
59 | ENUMCACHE, |
60 | ADDRTONAME, |
61 | HXINFO, |
62 | MXINFO |
63 | }; |
64 | |
65 | #define NUM_ALT_ADDRS 4 |
66 | |
67 | typedef struct hostInfo { |
68 | int rtnCode; |
69 | char cname[255]; |
70 | unsigned long addr[NUM_ALT_ADDRS]; |
71 | }; |
72 | |
73 | typedef CALLBACK_API(void, ResultProcPtr)(struct hostInfo *, char *); |
74 | typedef STACK_UPP_TYPE(ResultProcPtr) ResultUPP; |
75 | enum { uppResultProcInfo = kPascalStackBased |
76 | | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(struct hostInfo*))) |
77 | | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *))) |
78 | }; |
79 | #define NewResultUPP(userRoutine) \ |
80 | (ResultUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), \ |
81 | uppResultProcInfo, \ |
82 | GetCurrentArchitecture()) |
83 | #define DisposeResultUPP(userUPP) DisposeRoutineDescriptor(userUPP) |
84 | |
85 | static OSErr StrToAddr(char *, struct hostInfo *, ResultUPP *, char *); |
86 | |
87 | typedef CALLBACK_API_C(OSErr, OpenResolverProcPtr)(UInt32, char *); |
88 | typedef STACK_UPP_TYPE(OpenResolverProcPtr) OpenResolverUPP; |
89 | enum { uppOpenResolverProcInfo = kCStackBased |
90 | | RESULT_SIZE(SIZE_CODE(sizeof(OSErr))) |
91 | | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32))) |
92 | | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char*))) |
93 | }; |
94 | #define InvokeOpenResolverUPP(selector, fileName, userUPP) \ |
95 | CALL_TWO_PARAMETER_UPP((userUPP), uppOpenResolverProcInfo, \ |
96 | (selector), (fileName)) |
97 | |
98 | typedef CALLBACK_API_C(OSErr, CloseResolverProcPtr)(UInt32); |
99 | typedef STACK_UPP_TYPE(CloseResolverProcPtr) CloseResolverUPP; |
100 | enum { uppCloseResolverProcInfo = kCStackBased |
101 | | RESULT_SIZE(SIZE_CODE(sizeof(OSErr))) |
102 | | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32))) |
103 | }; |
104 | #define InvokeCloseResolverUPP(selector, userUPP) \ |
105 | CALL_ONE_PARAMETER_UPP((userUPP), uppCloseResolverProcInfo, (selector)) |
106 | |
107 | typedef CALLBACK_API_C(OSErr, StrToAddrProcPtr)(UInt32, char *, |
108 | struct hostInfo *, ResultUPP, |
109 | char *); |
110 | typedef STACK_UPP_TYPE(StrToAddrProcPtr) StrToAddrUPP; |
111 | enum { uppStrToAddrProcInfo = kCStackBased |
112 | | RESULT_SIZE(SIZE_CODE(sizeof(OSErr))) |
113 | | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32))) |
114 | | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *))) |
115 | | STACK_ROUTINE_PARAMETER(3, SIZE_CODE(sizeof(struct hostInfo *))) |
116 | | STACK_ROUTINE_PARAMETER(4, SIZE_CODE(sizeof(ResultUPP))) |
117 | | STACK_ROUTINE_PARAMETER(5, SIZE_CODE(sizeof(char *))) |
118 | }; |
119 | #define InvokeStrToAddrUPP(selector, hostName, hostInfoPtr, ResultProc, \ |
120 | userDataPtr, userUPP) \ |
121 | CALL_FIVE_PARAMETER_UPP((userUPP), uppStrToAddrProcInfo, (selector),\ |
122 | (hostName), (hostInfoPtr), (ResultProc), \ |
123 | (userDataPtr)) |
124 | #define StrToAddr(hostName, hostInfoPtr, ResultProc, userDataPtr) \ |
125 | InvokeStrToAddrUPP(STRTOADDR, hostName, hostInfoPtr, ResultProc, \ |
126 | userDataPtr, (StrToAddrUPP)*mactcp.dnr_handle) |
127 | |
128 | typedef CALLBACK_API_C(OSErr, AddrToStrProcPtr)(UInt32, unsigned long, char *); |
129 | typedef STACK_UPP_TYPE(AddrToStrProcPtr) AddrToStrUPP; |
130 | enum { uppAddrToStrProcInfo = kCStackBased |
131 | | RESULT_SIZE(SIZE_CODE(sizeof(OSErr))) |
132 | | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(unsigned long))) |
133 | | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *))) |
134 | }; |
135 | #define InvokeAddrToStrUPP(selector, addr, addrStr, userUPP) \ |
136 | CALL_THREE_PARAMETER_UPP((userUPP), uppAddrToStrProcInfo, (selector),\ |
137 | (addr), (addrStr)) |
138 | #define AddrToStr(addr, addrStr) \ |
139 | InvokeAddrToStrUPP(ADDRTOSTR, addr, addrStr, \ |
140 | (AddrToStrUPP)*mactcp.dnr_handle) |
141 | |
142 | /* End of AddressXlation.h bits */ |
143 | |
144 | struct Socket_tag { |
145 | struct socket_function_table *fn; |
146 | /* the above variable absolutely *must* be the first in this structure */ |
147 | }; |
148 | |
149 | /* |
150 | * We used to typedef struct Socket_tag *Socket. |
151 | * |
152 | * Since we have made the networking abstraction slightly more |
153 | * abstract, Socket no longer means a tcp socket (it could mean |
154 | * an ssl socket). So now we must use Actual_Socket when we know |
155 | * we are talking about a tcp socket. |
156 | */ |
157 | typedef struct Socket_tag *Actual_Socket; |
158 | |
159 | struct SockAddr_tag { |
160 | int resolved; |
161 | struct hostInfo hostinfo; |
162 | char hostname[512]; |
163 | }; |
164 | |
165 | /* Global variables */ |
166 | static struct { |
167 | Handle dnr_handle; |
168 | int initialised; |
169 | short refnum; |
170 | } mactcp; |
171 | |
172 | static pascal void mactcp_lookupdone(struct hostInfo *hi, char *cookie); |
173 | |
174 | /* |
175 | * Initialise MacTCP. |
176 | * This should be called once before any TCP connection is opened. |
177 | */ |
178 | |
179 | OSErr mactcp_init(void) |
180 | { |
181 | OSErr err; |
182 | |
183 | /* |
184 | * IM:Devices describes a convoluted way of finding a spare unit |
185 | * number to open a driver on before calling OpenDriver. Happily, |
186 | * I think the MacTCP INIT ensures that .IPP is already open (and |
187 | * hence has a valid unit number already) so we don't need to go |
188 | * through all that. |
189 | */ |
190 | err = OpenDriver("\p.IPP", &mactcp.refnum); |
191 | if (err != noErr) return err; |
192 | err = OpenResolver(NULL); |
193 | if (err != noErr) return err; |
194 | |
195 | mactcp.initialised = TRUE; |
196 | return noErr; |
197 | } |
198 | |
199 | void mactcp_shutdown(void) |
200 | { |
201 | |
202 | CloseResolver(); |
203 | mactcp.initialised = FALSE; |
204 | } |
205 | |
206 | static ResultUPP mactcp_lookupdone_upp; |
207 | |
208 | SockAddr sk_namelookup(char *host, char **canonicalname) |
209 | { |
210 | SockAddr ret = smalloc(sizeof(struct SockAddr_tag)); |
211 | OSErr err; |
212 | volatile int done = FALSE; |
213 | char *realhost; |
214 | |
215 | /* Clear the structure. */ |
216 | memset(ret, 0, sizeof(struct SockAddr_tag)); |
217 | if (mactcp_lookupdone_upp == NULL) |
218 | mactcp_lookupdone_upp = NewResultUPP(&mactcp_lookupdone); |
219 | err = StrToAddr(host, &ret->hostinfo, mactcp_lookupdone_upp, |
220 | (char *)&done); |
221 | /* |
222 | * PuTTY expects DNS lookups to be synchronous (see bug |
223 | * "async-dns"), so we pretend they are. |
224 | */ |
225 | if (err == cacheFault) |
226 | while (!done) |
227 | continue; |
228 | ret->resolved = TRUE; |
229 | |
230 | if (ret->hostinfo.rtnCode == noErr) |
231 | realhost = ret->hostinfo.cname; |
232 | else |
233 | realhost = ""; |
234 | *canonicalname = smalloc(1+strlen(realhost)); |
235 | strcpy(*canonicalname, realhost); |
236 | return ret; |
237 | } |
238 | |
239 | static pascal void mactcp_lookupdone(struct hostInfo *hi, char *cookie) |
240 | { |
241 | volatile int *donep = (int *)cookie; |
242 | |
243 | *donep = TRUE; |
244 | } |
245 | |
246 | SockAddr sk_nonamelookup(char *host) |
247 | { |
248 | SockAddr ret = smalloc(sizeof(struct SockAddr_tag)); |
249 | |
250 | ret->resolved = FALSE; |
251 | ret->hostinfo.rtnCode = noErr; |
252 | ret->hostname[0] = '\0'; |
253 | strncat(ret->hostname, host, lenof(ret->hostname) - 1); |
254 | return ret; |
255 | } |
256 | |
257 | void sk_getaddr(SockAddr addr, char *buf, int buflen) |
258 | { |
259 | char mybuf[16]; |
260 | OSErr err; |
261 | |
262 | /* XXX only return first address */ |
263 | err = AddrToStr(addr->hostinfo.addr[0], mybuf); |
264 | buf[0] = '\0'; |
265 | if (err != noErr) |
266 | strncat(buf, mybuf, buflen - 1); |
267 | } |
268 | |
269 | /* I think "local" here really means "loopback" */ |
270 | |
271 | int sk_hostname_is_local(char *name) |
272 | { |
273 | |
274 | return !strcmp(name, "localhost"); |
275 | } |
276 | |
277 | int sk_address_is_local(SockAddr addr) |
278 | { |
279 | int i; |
280 | |
281 | if (addr->resolved) |
282 | for (i = 0; i < NUM_ALT_ADDRS; i++) |
283 | if (addr->hostinfo.addr[i] & 0xff000000 == 0x7f000000) |
284 | return TRUE; |
285 | return FALSE; |
286 | } |
287 | |
288 | int sk_addrtype(SockAddr addr) |
289 | { |
290 | |
291 | if (addr->resolved) |
292 | return ADDRTYPE_IPV4; |
293 | return ADDRTYPE_NAME; |
294 | } |
295 | |
296 | void sk_addrcopy(SockAddr addr, char *buf) |
297 | { |
298 | |
299 | /* XXX only return first address */ |
300 | memcpy(buf, &addr->hostinfo.addr[0], 4); |
301 | } |
302 | |
303 | void sk_addr_free(SockAddr addr) |
304 | { |
305 | |
306 | sfree(addr); |
307 | } |
308 | |
309 | Socket sk_new(SockAddr addr, int port, int privport, int oobinline, |
310 | int nodelay, Plug plug) |
311 | { |
312 | |
313 | fatalbox("sk_new"); |
314 | } |
315 | |
316 | /* |
317 | * Special error values are returned from sk_namelookup and sk_new |
318 | * if there's a problem. These functions extract an error message, |
319 | * or return NULL if there's no problem. |
320 | */ |
321 | char *sk_addr_error(SockAddr addr) |
322 | { |
323 | static char buf[64]; |
324 | |
325 | switch (addr->hostinfo.rtnCode) { |
326 | case noErr: |
327 | return NULL; |
328 | case nameSyntaxErr: |
329 | return "Name syntax error"; |
330 | case noNameServer: |
331 | return "No name server found"; |
332 | case authNameErr: |
333 | return "Domain name does not exist"; |
334 | case noAnsErr: |
335 | return "No answer from domain name server"; |
336 | case dnrErr: |
337 | return "Domain name server returned an error"; |
338 | case outOfMemory: |
339 | return "Out of memory"; |
340 | default: |
341 | sprintf(buf, "Unknown DNR error %d", addr->hostinfo.rtnCode); |
342 | return buf; |
343 | } |
344 | } |
345 | |
346 | |
347 | /* |
348 | * Bits below here would usually be in dnr.c, shipped with the MacTCP |
349 | * SDK, but its convenient not to require that, and since we assume |
350 | * System 7 we can actually simplify things a lot. |
351 | */ |
352 | |
353 | static OSErr OpenResolver(char *hosts_file) |
354 | { |
355 | short vrefnum; |
356 | long dirid; |
357 | HParamBlockRec pb; |
358 | Str255 filename; |
359 | OSErr err; |
360 | int fd; |
361 | Handle dnr_handle; |
362 | |
363 | if (mactcp.dnr_handle != NULL) |
364 | return noErr; |
365 | |
366 | err = FindFolder(kOnSystemDisk, kControlPanelFolderType, FALSE, &vrefnum, |
367 | &dirid); |
368 | if (err != noErr) return err; |
369 | |
370 | /* |
371 | * Might be better to use PBCatSearch here, but it's not always |
372 | * available. |
373 | */ |
374 | pb.fileParam.ioCompletion = NULL; |
375 | pb.fileParam.ioNamePtr = filename; |
376 | pb.fileParam.ioVRefNum = vrefnum; |
377 | pb.fileParam.ioFDirIndex = 1; |
378 | pb.fileParam.ioDirID = dirid; |
379 | fd = -1; |
380 | |
381 | while (PBHGetFInfo(&pb, FALSE) == noErr) { |
382 | if (pb.fileParam.ioFlFndrInfo.fdType == 'cdev' && |
383 | pb.fileParam.ioFlFndrInfo.fdCreator == 'ztcp') { |
384 | fd = HOpenResFile(vrefnum, dirid, filename, fsRdPerm); |
385 | if (fd == -1) continue; |
386 | dnr_handle = Get1IndResource('dnrp', 1); |
387 | if (dnr_handle != NULL) |
388 | break; |
389 | CloseResFile(fd); |
390 | fd = -1; |
391 | } |
392 | pb.fileParam.ioDirID = dirid; |
393 | pb.fileParam.ioFDirIndex++; |
394 | } |
395 | if (fd == -1) |
396 | return fnfErr; |
397 | |
398 | DetachResource(dnr_handle); |
399 | CloseResFile(fd); |
400 | |
401 | MoveHHi(dnr_handle); |
402 | HLock(dnr_handle); |
403 | |
404 | err = InvokeOpenResolverUPP(OPENRESOLVER, hosts_file, |
405 | (OpenResolverUPP)*dnr_handle); |
406 | if (err != noErr) { |
407 | HUnlock(dnr_handle); |
408 | DisposeHandle(dnr_handle); |
409 | return err; |
410 | } |
411 | |
412 | mactcp.dnr_handle = dnr_handle; |
413 | return noErr; |
414 | } |
415 | |
416 | OSErr CloseResolver(void) |
417 | { |
418 | Handle dnr_handle = mactcp.dnr_handle; |
419 | OSErr err; |
420 | |
421 | if (mactcp.dnr_handle == NULL) |
422 | return notOpenErr; |
423 | |
424 | err = InvokeCloseResolverUPP(CLOSERESOLVER, |
425 | (CloseResolverUPP)*mactcp.dnr_handle); |
426 | if (err != noErr) |
427 | return err; |
428 | |
429 | mactcp.dnr_handle = NULL; |
430 | HUnlock(dnr_handle); |
431 | DisposeHandle(dnr_handle); |
432 | return noErr; |
433 | } |
434 | |
435 | /* |
436 | * Local Variables: |
437 | * c-file-style: "simon" |
438 | * End: |
439 | */ |