2 * Copyright (c) 2003 Ben Harris
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
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
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
27 * mtcpnet.c - MacTCP interface
35 #include <MixedMode.h>
36 #include <Resources.h>
40 #define DEFINE_PLUG_METHOD_MACROS
46 * The following structures are documented as being in
47 * <AddressXlation.h>, but that isn't shipped with Universal
48 * Interfaces, and it's easier to define them here than to require
49 * people to download yet another SDK.
52 static OSErr
OpenResolver(char *);
53 static OSErr
CloseResolver(void);
66 #define NUM_ALT_ADDRS 4
68 typedef struct hostInfo
{
71 unsigned long addr
[NUM_ALT_ADDRS
];
74 typedef CALLBACK_API(void, ResultProcPtr
)(struct hostInfo
*, char *);
75 typedef STACK_UPP_TYPE(ResultProcPtr
) ResultUPP
;
76 enum { uppResultProcInfo
= kPascalStackBased
77 | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(struct hostInfo
*)))
78 | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
80 #define NewResultUPP(userRoutine) \
81 (ResultUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), \
83 GetCurrentArchitecture())
84 #define DisposeResultUPP(userUPP) DisposeRoutineDescriptor(userUPP)
86 static OSErr
StrToAddr(char *, struct hostInfo
*, ResultUPP
*, char *);
88 typedef CALLBACK_API_C(OSErr
, OpenResolverProcPtr
)(UInt32
, char *);
89 typedef STACK_UPP_TYPE(OpenResolverProcPtr
) OpenResolverUPP
;
90 enum { uppOpenResolverProcInfo
= kCStackBased
91 | RESULT_SIZE(SIZE_CODE(sizeof(OSErr
)))
92 | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32
)))
93 | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char*)))
95 #define InvokeOpenResolverUPP(selector, fileName, userUPP) \
96 CALL_TWO_PARAMETER_UPP((userUPP), uppOpenResolverProcInfo, \
97 (selector), (fileName))
99 typedef CALLBACK_API_C(OSErr
, CloseResolverProcPtr
)(UInt32
);
100 typedef STACK_UPP_TYPE(CloseResolverProcPtr
) CloseResolverUPP
;
101 enum { uppCloseResolverProcInfo
= kCStackBased
102 | RESULT_SIZE(SIZE_CODE(sizeof(OSErr
)))
103 | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32
)))
105 #define InvokeCloseResolverUPP(selector, userUPP) \
106 CALL_ONE_PARAMETER_UPP((userUPP), uppCloseResolverProcInfo, (selector))
108 typedef CALLBACK_API_C(OSErr
, StrToAddrProcPtr
)(UInt32
, char *,
109 struct hostInfo
*, ResultUPP
,
111 typedef STACK_UPP_TYPE(StrToAddrProcPtr
) StrToAddrUPP
;
112 enum { uppStrToAddrProcInfo
= kCStackBased
113 | RESULT_SIZE(SIZE_CODE(sizeof(OSErr
)))
114 | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32
)))
115 | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
116 | STACK_ROUTINE_PARAMETER(3, SIZE_CODE(sizeof(struct hostInfo
*)))
117 | STACK_ROUTINE_PARAMETER(4, SIZE_CODE(sizeof(ResultUPP
)))
118 | STACK_ROUTINE_PARAMETER(5, SIZE_CODE(sizeof(char *)))
120 #define InvokeStrToAddrUPP(selector, hostName, hostInfoPtr, ResultProc, \
121 userDataPtr, userUPP) \
122 CALL_FIVE_PARAMETER_UPP((userUPP), uppStrToAddrProcInfo, (selector),\
123 (hostName), (hostInfoPtr), (ResultProc), \
125 #define StrToAddr(hostName, hostInfoPtr, ResultProc, userDataPtr) \
126 InvokeStrToAddrUPP(STRTOADDR, hostName, hostInfoPtr, ResultProc, \
127 userDataPtr, (StrToAddrUPP)*mactcp.dnr_handle)
129 typedef CALLBACK_API_C(OSErr
, AddrToStrProcPtr
)(UInt32
, unsigned long, char *);
130 typedef STACK_UPP_TYPE(AddrToStrProcPtr
) AddrToStrUPP
;
131 enum { uppAddrToStrProcInfo
= kCStackBased
132 | RESULT_SIZE(SIZE_CODE(sizeof(OSErr
)))
133 | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32
)))
134 | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(unsigned long)))
135 | STACK_ROUTINE_PARAMETER(3, SIZE_CODE(sizeof(char *)))
137 #define InvokeAddrToStrUPP(selector, addr, addrStr, userUPP) \
138 CALL_THREE_PARAMETER_UPP((userUPP), uppAddrToStrProcInfo, (selector),\
140 #define AddrToStr(addr, addrStr) \
141 InvokeAddrToStrUPP(ADDRTOSTR, addr, addrStr, \
142 (AddrToStrUPP)*mactcp.dnr_handle)
144 /* End of AddressXlation.h bits */
146 /* TCP connection states, mysteriously missing from <MacTCP.h> */
147 #define TCPS_CLOSED 0
148 #define TCPS_LISTEN 2
149 #define TCPS_SYN_RECEIVED 4
150 #define TCPS_SYN_SENT 6
151 #define TCPS_ESTABLISHED 8
152 #define TCPS_FIN_WAIT_1 10
153 #define TCPS_FIN_WAIT_2 12
154 #define TCPS_CLOSE_WAIT 14
155 #define TCPS_CLOSING 16
156 #define TCPS_LAST_ACK 18
157 #define TCPS_TIME_WAIT 20
160 struct socket_function_table
*fn
;
161 /* the above variable absolutely *must* be the first in this structure */
166 bufchain output_data
;
169 int frozen
; /* this causes readability notifications to be ignored */
170 int frozen_readable
; /* this means we missed at least one readability
171 * notification while we were frozen */
172 int localhost_only
; /* for listening sockets */
175 int oobpending
; /* is there OOB data available to read? */
177 int pending_error
; /* in case send() returns error */
179 struct Socket_tag
*next
;
180 struct Socket_tag
**prev
;
184 * We used to typedef struct Socket_tag *Socket.
186 * Since we have made the networking abstraction slightly more
187 * abstract, Socket no longer means a tcp socket (it could mean
188 * an ssl socket). So now we must use Actual_Socket when we know
189 * we are talking about a tcp socket.
191 typedef struct Socket_tag
*Actual_Socket
;
193 struct SockAddr_tag
{
195 struct hostInfo hostinfo
;
199 /* Global variables */
204 ProcessSerialNumber self
;
205 Actual_Socket socklist
;
208 static pascal void mactcp_lookupdone(struct hostInfo
*hi
, char *cookie
);
209 static pascal void mactcp_asr(StreamPtr
, unsigned short, Ptr
, unsigned short,
210 struct ICMPReport
*);
211 static Plug
mactcp_plug(Socket
, Plug
);
212 static void mactcp_flush(Socket
);
213 static void mactcp_close(Socket
);
214 static int mactcp_write(Socket
, char const *, int);
215 static int mactcp_write_oob(Socket
, char const*, int);
216 static void mactcp_set_private_ptr(Socket
, void *);
217 static void *mactcp_get_private_ptr(Socket
);
218 static char *mactcp_socket_error(Socket
);
219 static void mactcp_set_frozen(Socket
, int);
221 static void mactcp_recv(Actual_Socket s
, size_t len
);
225 * This should be called once before any TCP connection is opened.
228 OSErr
mactcp_init(void)
233 * IM:Devices describes a convoluted way of finding a spare unit
234 * number to open a driver on before calling OpenDriver. Happily,
235 * the MacTCP INIT ensures that .IPP is already open (and hence
236 * has a valid unit number already) so we don't need to go through
237 * all that. (MacTCP Programmer's Guide p6)
239 err
= OpenDriver("\p.IPP", &mactcp
.refnum
);
240 if (err
!= noErr
) return err
;
241 err
= OpenResolver(NULL
);
242 if (err
!= noErr
) return err
;
244 mactcp
.initialised
= TRUE
;
248 void mactcp_cleanup(void)
250 Actual_Socket s
, next
;
253 * Eventually, PuTTY should close down each session as it exits,
254 * so there should be no sockets left when we get here. Still,
255 * better safe than sorry.
257 * XXX What about in-flight aync I/O (when we support that)?
259 for (s
= mactcp
.socklist
; s
!= NULL
; s
= next
) {
260 next
= s
->next
; /* s is about to vanish */
261 mactcp_close(&s
->fn
);
265 * When we get async DNS, we have to wait for any outstanding
266 * requests to complete here before exiting.
269 mactcp
.initialised
= FALSE
;
272 static ResultUPP mactcp_lookupdone_upp
;
274 SockAddr
mactcp_namelookup(char const *host
, char **canonicalname
)
276 SockAddr ret
= smalloc(sizeof(struct SockAddr_tag
));
278 volatile int done
= FALSE
;
282 /* Clear the structure. */
283 memset(ret
, 0, sizeof(struct SockAddr_tag
));
284 if (mactcp_lookupdone_upp
== NULL
)
285 mactcp_lookupdone_upp
= NewResultUPP(&mactcp_lookupdone
);
286 /* Casting away const -- hope StrToAddr is sensible */
287 err
= StrToAddr((char *)host
, &ret
->hostinfo
, mactcp_lookupdone_upp
,
290 * PuTTY expects DNS lookups to be synchronous (see bug
291 * "async-dns"), so we pretend they are.
293 if (err
== cacheFault
)
296 ret
->resolved
= TRUE
;
298 if (ret
->hostinfo
.rtnCode
== noErr
) {
299 realhost
= ret
->hostinfo
.cname
;
300 /* MacTCP puts trailing dots on canonical names. */
301 realhostlen
= strlen(realhost
);
302 if (realhost
[realhostlen
- 1] == '.')
303 realhost
[realhostlen
- 1] = '\0';
306 *canonicalname
= smalloc(1+strlen(realhost
));
307 strcpy(*canonicalname
, realhost
);
311 static pascal void mactcp_lookupdone(struct hostInfo
*hi
, char *cookie
)
313 volatile int *donep
= (int *)cookie
;
318 SockAddr
mactcp_nonamelookup(char const *host
)
320 SockAddr ret
= smalloc(sizeof(struct SockAddr_tag
));
322 ret
->resolved
= FALSE
;
323 ret
->hostinfo
.rtnCode
= noErr
;
324 ret
->hostname
[0] = '\0';
325 strncat(ret
->hostname
, host
, lenof(ret
->hostname
) - 1);
329 void mactcp_getaddr(SockAddr addr
, char *buf
, int buflen
)
334 if (addr
->resolved
) {
335 /* XXX only return first address */
336 err
= AddrToStr(addr
->hostinfo
.addr
[0], mybuf
);
339 strncat(buf
, mybuf
, buflen
- 1);
342 strncat(buf
, addr
->hostname
, buflen
- 1);
346 /* I think "local" here really means "loopback" */
348 int mactcp_hostname_is_local(char *name
)
351 return !strcmp(name
, "localhost");
354 int mactcp_address_is_local(SockAddr addr
)
359 for (i
= 0; i
< NUM_ALT_ADDRS
; i
++)
360 if (addr
->hostinfo
.addr
[i
] & 0xff000000 == 0x7f000000)
365 int mactcp_addrtype(SockAddr addr
)
369 return ADDRTYPE_IPV4
;
370 return ADDRTYPE_NAME
;
373 void mactcp_addrcopy(SockAddr addr
, char *buf
)
376 /* XXX only return first address */
377 memcpy(buf
, &addr
->hostinfo
.addr
[0], 4);
380 void mactcp_addr_free(SockAddr addr
)
386 static Plug
mactcp_plug(Socket sock
, Plug p
)
388 Actual_Socket s
= (Actual_Socket
) sock
;
396 static void mactcp_flush(Socket s
)
399 fatalbox("mactcp_flush");
402 Socket
mactcp_register(void *sock
, Plug plug
)
405 fatalbox("mactcp_register");
408 static TCPNotifyUPP mactcp_asr_upp
;
410 Socket
mactcp_new(SockAddr addr
, int port
, int privport
, int oobinline
,
411 int nodelay
, Plug plug
)
413 static struct socket_function_table fn_table
= {
419 mactcp_set_private_ptr
,
420 mactcp_get_private_ptr
,
431 * Create Socket structure.
433 ret
= smalloc(sizeof(struct Socket_tag
));
438 bufchain_init(&ret
->output_data
);
439 ret
->connected
= 0; /* to start with */
440 ret
->writable
= 0; /* to start with */
441 ret
->sending_oob
= 0;
443 ret
->frozen_readable
= 0;
444 ret
->localhost_only
= 0; /* unused, but best init anyway */
445 ret
->pending_error
= 0;
446 ret
->oobinline
= oobinline
;
447 ret
->oobpending
= FALSE
;
450 dstaddr
= addr
->hostinfo
.addr
[0]; /* XXX should try all of them */
452 * Create a TCP stream.
454 * MacTCP requires us to provide it with some buffer memory. Page
455 * 31 of the Programmer's Guide says it should be a minimum of
456 * 4*MTU+1024. Page 36 says a minimum of 4096 bytes. Assume
457 * they're both correct.
459 assert(addr
->resolved
);
460 upb
.ioCRefNum
= mactcp
.refnum
;
461 upb
.csCode
= UDPMaxMTUSize
;
462 upb
.csParam
.mtu
.remoteHost
= dstaddr
;
463 upb
.csParam
.mtu
.userDataPtr
= NULL
;
464 ret
->err
= PBControlSync((ParmBlkPtr
)&upb
);
465 if (ret
->err
!= noErr
) return (Socket
)ret
;
467 buflen
= upb
.csParam
.mtu
.mtuSize
* 4 + 1024;
468 if (buflen
< 4096) buflen
= 4096;
469 if (mactcp_asr_upp
== NULL
)
470 mactcp_asr_upp
= NewTCPNotifyUPP(&mactcp_asr
);
471 GetCurrentProcess(&mactcp
.self
);
472 pb
.ioCRefNum
= mactcp
.refnum
;
473 pb
.csCode
= TCPCreate
;
474 pb
.csParam
.create
.rcvBuff
= smalloc(buflen
);
475 pb
.csParam
.create
.rcvBuffLen
= buflen
;
476 pb
.csParam
.create
.notifyProc
= mactcp_asr_upp
;
477 pb
.csParam
.create
.userDataPtr
= (Ptr
)ret
;
478 ret
->err
= PBControlSync((ParmBlkPtr
)&pb
);
479 if (ret
->err
!= noErr
) return (Socket
)ret
;
480 ret
->s
= pb
.tcpStream
;
483 * Open the connection.
485 pb
.ioCRefNum
= mactcp
.refnum
;
486 pb
.csCode
= TCPActiveOpen
;
487 pb
.tcpStream
= ret
->s
;
488 pb
.csParam
.open
.validityFlags
= 0;
489 pb
.csParam
.open
.remoteHost
= dstaddr
;
490 pb
.csParam
.open
.remotePort
= port
;
491 pb
.csParam
.open
.localPort
= privport ?
1023 : 0;
492 pb
.csParam
.open
.dontFrag
= FALSE
;
493 pb
.csParam
.open
.timeToLive
= 0;
494 pb
.csParam
.open
.security
= 0;
495 pb
.csParam
.open
.optionCnt
= 0;
496 pb
.csParam
.open
.userDataPtr
= (Ptr
)ret
;
498 ret
->err
= PBControlSync((ParmBlkPtr
)&pb
);
499 if (!privport
|| ret
->err
!= duplicateSocket
)
501 pb
.csParam
.open
.localPort
--;
502 if (pb
.csParam
.open
.localPort
== 0)
506 if (ret
->err
!= noErr
) return (Socket
)ret
;
508 ret
->connected
= TRUE
;
509 ret
->writable
= TRUE
;
511 /* Add this to the list of all sockets */
512 ret
->next
= mactcp
.socklist
;
513 ret
->prev
= &mactcp
.socklist
;
514 if (ret
->next
!= NULL
)
515 ret
->next
->prev
= &ret
->next
;
516 mactcp
.socklist
= ret
;
521 Socket
mactcp_newlistener(char *srcaddr
, int port
, Plug plug
,
525 fatalbox("mactcp_newlistener");
528 static void mactcp_close(Socket sock
)
530 Actual_Socket s
= (Actual_Socket
)sock
;
534 * TCPClose is equivalent to shutdown(fd, SHUT_WR), and hence
535 * leaves the Rx side open, while TCPAbort seems rather vicious,
536 * throwing away Tx data that haven't been ACKed yet. We do both
539 pb
.ioCRefNum
= mactcp
.refnum
;
540 pb
.csCode
= TCPClose
;
542 pb
.csParam
.close
.validityFlags
= 0;
543 pb
.csParam
.close
.userDataPtr
= (Ptr
)s
;
544 s
->err
= PBControlSync((ParmBlkPtr
)&pb
);
545 /* Not much we can do about an error anyway. */
547 pb
.ioCRefNum
= mactcp
.refnum
;
548 pb
.csCode
= TCPAbort
;
550 pb
.csParam
.abort
.userDataPtr
= (Ptr
)s
;
551 s
->err
= PBControlSync((ParmBlkPtr
)&pb
);
552 /* Even less we can do about an error here. */
554 pb
.ioCRefNum
= mactcp
.refnum
;
555 pb
.csCode
= TCPRelease
;
557 pb
.csParam
.create
.userDataPtr
= (Ptr
)s
;
558 s
->err
= PBControlSync((ParmBlkPtr
)&pb
);
560 sfree(pb
.csParam
.create
.rcvBuff
);
562 /* Unhitch from list of sockets */
565 s
->next
->prev
= s
->prev
;
570 static int mactcp_write(Socket sock
, char const *buf
, int len
)
572 Actual_Socket s
= (Actual_Socket
) sock
;
577 * Casting away const from buf should be safe -- MacTCP won't
581 wds
[0].ptr
= (char *)buf
;
584 pb
.ioCRefNum
= mactcp
.refnum
;
587 pb
.csParam
.send
.validityFlags
= 0;
588 pb
.csParam
.send
.pushFlag
= TRUE
; /* XXX we want it to return. */
589 pb
.csParam
.send
.urgentFlag
= 0;
590 pb
.csParam
.send
.wdsPtr
= (Ptr
)wds
;
591 pb
.csParam
.send
.userDataPtr
= (Ptr
)s
;
592 s
->err
= PBControlSync((ParmBlkPtr
)&pb
);
596 static int mactcp_write_oob(Socket sock
, char const *buf
, int len
)
599 fatalbox("mactcp_write_oob");
602 static pascal void mactcp_asr(StreamPtr str
, unsigned short event
, Ptr cookie
,
603 unsigned short termin_reason
,
604 struct ICMPReport
*icmp
)
607 WakeUpProcess(&mactcp
.self
);
611 * Called from our event loop if there's work to do.
613 void mactcp_poll(void)
615 Actual_Socket s
, next
;
618 for (s
= mactcp
.socklist
; s
!= NULL
; s
= next
) {
621 pb
.ioCRefNum
= mactcp
.refnum
;
622 pb
.csCode
= TCPStatus
;
624 pb
.csParam
.status
.userDataPtr
= (Ptr
)s
;
625 s
->err
= PBControlSync((ParmBlkPtr
)&pb
);
628 if (pb
.csParam
.status
.amtUnreadData
== 0)
630 mactcp_recv(s
, pb
.csParam
.status
.amtUnreadData
);
632 switch (pb
.csParam
.status
.connectionState
) {
633 case TCPS_CLOSE_WAIT
:
634 /* Remote end has sent us a FIN */
635 plug_closing(s
->plug
, NULL
, 0, 0);
642 static void mactcp_recv(Actual_Socket s
, size_t len
)
647 if (s
->frozen
) return;
650 pb
.ioCRefNum
= mactcp
.refnum
;
651 pb
.csCode
= TCPNoCopyRcv
;
653 pb
.csParam
.receive
.commandTimeoutValue
= 0;
654 pb
.csParam
.receive
.rdsPtr
= (Ptr
)rds
;
655 pb
.csParam
.receive
.rdsLength
= lenof(rds
) - 1;
656 pb
.csParam
.receive
.userDataPtr
= (Ptr
)s
;
657 s
->err
= PBControlSync((ParmBlkPtr
)&pb
);
660 plug_receive(s
->plug
, 0, rds
[0].ptr
, rds
[0].length
);
661 len
-= rds
[0].length
;
662 pb
.csCode
= TCPRcvBfrReturn
;
663 s
->err
= PBControlSync((ParmBlkPtr
)&pb
);
670 * Each socket abstraction contains a `void *' private field in
671 * which the client can keep state.
673 static void mactcp_set_private_ptr(Socket sock
, void *ptr
)
675 Actual_Socket s
= (Actual_Socket
) sock
;
676 s
->private_ptr
= ptr
;
679 static void *mactcp_get_private_ptr(Socket sock
)
681 Actual_Socket s
= (Actual_Socket
) sock
;
682 return s
->private_ptr
;
686 * Special error values are returned from mactcp_namelookup and
687 * mactcp_new if there's a problem. These functions extract an error
688 * message, or return NULL if there's no problem.
690 char *mactcp_addr_error(SockAddr addr
)
694 switch (addr
->hostinfo
.rtnCode
) {
698 return "Name syntax error";
700 return "No name server found";
702 return "Domain name does not exist";
704 return "No answer from domain name server";
706 return "Domain name server returned an error";
708 return "Out of memory";
710 sprintf(buf
, "Unknown DNR error %d", addr
->hostinfo
.rtnCode
);
715 static char *mactcp_socket_error(Socket sock
)
718 Actual_Socket s
= (Actual_Socket
) sock
;
723 case insufficientResources
:
724 return "Insufficient resources to open TCP stream";
725 case duplicateSocket
:
726 return "Duplicate socket";
728 return "Connection failed while opening";
730 sprintf(buf
, "Unknown MacTCP error %d", s
->err
);
735 static void mactcp_set_frozen(Socket sock
, int is_frozen
)
737 Actual_Socket s
= (Actual_Socket
) sock
;
739 if (s
->frozen
== is_frozen
)
741 s
->frozen
= is_frozen
;
745 * Bits below here would usually be in dnr.c, shipped with the MacTCP
746 * SDK, but its convenient not to require that, and since we assume
747 * System 7 we can actually simplify things a lot.
750 static OSErr
OpenResolver(char *hosts_file
)
760 if (mactcp
.dnr_handle
!= NULL
)
763 err
= FindFolder(kOnSystemDisk
, kControlPanelFolderType
, FALSE
, &vrefnum
,
765 if (err
!= noErr
) return err
;
768 * Might be better to use PBCatSearch here, but it's not always
771 pb
.fileParam
.ioCompletion
= NULL
;
772 pb
.fileParam
.ioNamePtr
= filename
;
773 pb
.fileParam
.ioVRefNum
= vrefnum
;
774 pb
.fileParam
.ioFDirIndex
= 1;
775 pb
.fileParam
.ioDirID
= dirid
;
778 while (PBHGetFInfoSync(&pb
) == noErr
) {
779 if (pb
.fileParam
.ioFlFndrInfo
.fdType
== 'cdev' &&
780 pb
.fileParam
.ioFlFndrInfo
.fdCreator
== 'ztcp') {
781 fd
= HOpenResFile(vrefnum
, dirid
, filename
, fsRdPerm
);
782 if (fd
== -1) continue;
783 dnr_handle
= Get1IndResource('dnrp', 1);
784 if (dnr_handle
!= NULL
)
789 pb
.fileParam
.ioDirID
= dirid
;
790 pb
.fileParam
.ioFDirIndex
++;
795 DetachResource(dnr_handle
);
801 err
= InvokeOpenResolverUPP(OPENRESOLVER
, hosts_file
,
802 (OpenResolverUPP
)*dnr_handle
);
805 DisposeHandle(dnr_handle
);
809 mactcp
.dnr_handle
= dnr_handle
;
813 OSErr
CloseResolver(void)
815 Handle dnr_handle
= mactcp
.dnr_handle
;
818 if (mactcp
.dnr_handle
== NULL
)
821 err
= InvokeCloseResolverUPP(CLOSERESOLVER
,
822 (CloseResolverUPP
)*mactcp
.dnr_handle
);
826 mactcp
.dnr_handle
= NULL
;
828 DisposeHandle(dnr_handle
);
832 /* MacTCP doesn't have a services database. */
833 int net_service_lookup(char *service
)
842 * c-file-style: "simon"