mirror of
https://git.tartarus.org/simon/putty.git
synced 2025-01-10 09:58:01 +00:00
30bff47c89
There are still lots of things to fix, like urgent data or the fact that everything seems to happen one keypress too late, but this is an important milestone. [originally from svn r2458]
763 lines
20 KiB
C
763 lines
20 KiB
C
/*
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* Copyright (c) 2003 Ben Harris
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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* mtcpnet.c - MacTCP interface
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*/
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#include <MacTypes.h>
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#include <Devices.h>
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#include <Endian.h>
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#include <Folders.h>
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#include <MacTCP.h>
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#include <MixedMode.h>
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#include <Resources.h>
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#include <assert.h>
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#define DEFINE_PLUG_METHOD_MACROS
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#include "putty.h"
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#include "network.h"
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#include "mac.h"
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/*
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* The following structures are documented as being in
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* <AddressXlation.h>, but that isn't shipped with Universal
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* Interfaces, and it's easier to define them here than to require
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* people to download yet another SDK.
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*/
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static OSErr OpenResolver(char *);
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static OSErr CloseResolver(void);
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enum {
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OPENRESOLVER = 1,
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CLOSERESOLVER,
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STRTOADDR,
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ADDRTOSTR,
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ENUMCACHE,
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ADDRTONAME,
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HXINFO,
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MXINFO
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};
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#define NUM_ALT_ADDRS 4
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typedef struct hostInfo {
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int rtnCode;
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char cname[255];
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unsigned long addr[NUM_ALT_ADDRS];
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};
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typedef CALLBACK_API(void, ResultProcPtr)(struct hostInfo *, char *);
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typedef STACK_UPP_TYPE(ResultProcPtr) ResultUPP;
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enum { uppResultProcInfo = kPascalStackBased
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| STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(struct hostInfo*)))
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| STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
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};
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#define NewResultUPP(userRoutine) \
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(ResultUPP)NewRoutineDescriptor((ProcPtr)(userRoutine), \
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uppResultProcInfo, \
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GetCurrentArchitecture())
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#define DisposeResultUPP(userUPP) DisposeRoutineDescriptor(userUPP)
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static OSErr StrToAddr(char *, struct hostInfo *, ResultUPP *, char *);
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typedef CALLBACK_API_C(OSErr, OpenResolverProcPtr)(UInt32, char *);
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typedef STACK_UPP_TYPE(OpenResolverProcPtr) OpenResolverUPP;
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enum { uppOpenResolverProcInfo = kCStackBased
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| RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
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| STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32)))
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| STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char*)))
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};
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#define InvokeOpenResolverUPP(selector, fileName, userUPP) \
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CALL_TWO_PARAMETER_UPP((userUPP), uppOpenResolverProcInfo, \
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(selector), (fileName))
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typedef CALLBACK_API_C(OSErr, CloseResolverProcPtr)(UInt32);
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typedef STACK_UPP_TYPE(CloseResolverProcPtr) CloseResolverUPP;
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enum { uppCloseResolverProcInfo = kCStackBased
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| RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
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| STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32)))
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};
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#define InvokeCloseResolverUPP(selector, userUPP) \
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CALL_ONE_PARAMETER_UPP((userUPP), uppCloseResolverProcInfo, (selector))
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typedef CALLBACK_API_C(OSErr, StrToAddrProcPtr)(UInt32, char *,
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struct hostInfo *, ResultUPP,
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char *);
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typedef STACK_UPP_TYPE(StrToAddrProcPtr) StrToAddrUPP;
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enum { uppStrToAddrProcInfo = kCStackBased
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| RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
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| STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32)))
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| STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
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| STACK_ROUTINE_PARAMETER(3, SIZE_CODE(sizeof(struct hostInfo *)))
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| STACK_ROUTINE_PARAMETER(4, SIZE_CODE(sizeof(ResultUPP)))
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| STACK_ROUTINE_PARAMETER(5, SIZE_CODE(sizeof(char *)))
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};
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#define InvokeStrToAddrUPP(selector, hostName, hostInfoPtr, ResultProc, \
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userDataPtr, userUPP) \
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CALL_FIVE_PARAMETER_UPP((userUPP), uppStrToAddrProcInfo, (selector),\
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(hostName), (hostInfoPtr), (ResultProc), \
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(userDataPtr))
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#define StrToAddr(hostName, hostInfoPtr, ResultProc, userDataPtr) \
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InvokeStrToAddrUPP(STRTOADDR, hostName, hostInfoPtr, ResultProc, \
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userDataPtr, (StrToAddrUPP)*mactcp.dnr_handle)
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typedef CALLBACK_API_C(OSErr, AddrToStrProcPtr)(UInt32, unsigned long, char *);
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typedef STACK_UPP_TYPE(AddrToStrProcPtr) AddrToStrUPP;
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enum { uppAddrToStrProcInfo = kCStackBased
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| RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
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| STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(unsigned long)))
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| STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
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};
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#define InvokeAddrToStrUPP(selector, addr, addrStr, userUPP) \
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CALL_THREE_PARAMETER_UPP((userUPP), uppAddrToStrProcInfo, (selector),\
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(addr), (addrStr))
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#define AddrToStr(addr, addrStr) \
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InvokeAddrToStrUPP(ADDRTOSTR, addr, addrStr, \
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(AddrToStrUPP)*mactcp.dnr_handle)
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/* End of AddressXlation.h bits */
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struct Socket_tag {
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struct socket_function_table *fn;
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/* the above variable absolutely *must* be the first in this structure */
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StreamPtr s;
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OSErr err;
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Plug plug;
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void *private_ptr;
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bufchain output_data;
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int connected;
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int writable;
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int frozen; /* this causes readability notifications to be ignored */
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int frozen_readable; /* this means we missed at least one readability
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* notification while we were frozen */
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int localhost_only; /* for listening sockets */
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char oobdata[1];
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int sending_oob;
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int oobpending; /* is there OOB data available to read? */
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int oobinline;
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int pending_error; /* in case send() returns error */
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int listener;
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struct Socket_tag *next;
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struct Socket_tag **prev;
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};
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/*
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* We used to typedef struct Socket_tag *Socket.
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*
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* Since we have made the networking abstraction slightly more
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* abstract, Socket no longer means a tcp socket (it could mean
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* an ssl socket). So now we must use Actual_Socket when we know
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* we are talking about a tcp socket.
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*/
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typedef struct Socket_tag *Actual_Socket;
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struct SockAddr_tag {
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int resolved;
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struct hostInfo hostinfo;
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char hostname[512];
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};
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/* Global variables */
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static struct {
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Handle dnr_handle;
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int initialised;
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short refnum;
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Actual_Socket socklist;
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} mactcp;
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static pascal void mactcp_lookupdone(struct hostInfo *hi, char *cookie);
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static Plug mactcp_plug(Socket, Plug);
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static void mactcp_flush(Socket);
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static void mactcp_close(Socket);
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static int mactcp_write(Socket, char *, int);
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static int mactcp_write_oob(Socket, char *, int);
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static void mactcp_set_private_ptr(Socket, void *);
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static void *mactcp_get_private_ptr(Socket);
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static char *mactcp_socket_error(Socket);
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static void mactcp_set_frozen(Socket, int);
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static void mactcp_recv(Actual_Socket s, size_t len);
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/*
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* Initialise MacTCP.
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* This should be called once before any TCP connection is opened.
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*/
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OSErr mactcp_init(void)
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{
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OSErr err;
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/*
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* IM:Devices describes a convoluted way of finding a spare unit
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* number to open a driver on before calling OpenDriver. Happily,
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* the MacTCP INIT ensures that .IPP is already open (and hence
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* has a valid unit number already) so we don't need to go through
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* all that. (MacTCP Programmer's Guide p6)
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*/
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err = OpenDriver("\p.IPP", &mactcp.refnum);
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if (err != noErr) return err;
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err = OpenResolver(NULL);
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if (err != noErr) return err;
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mactcp.initialised = TRUE;
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return noErr;
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}
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void mactcp_shutdown(void)
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{
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CloseResolver();
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mactcp.initialised = FALSE;
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}
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static ResultUPP mactcp_lookupdone_upp;
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SockAddr sk_namelookup(char *host, char **canonicalname)
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{
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SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
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OSErr err;
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volatile int done = FALSE;
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char *realhost;
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fprintf(stderr, "Resolving %s...\n", host);
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/* Clear the structure. */
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memset(ret, 0, sizeof(struct SockAddr_tag));
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if (mactcp_lookupdone_upp == NULL)
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mactcp_lookupdone_upp = NewResultUPP(&mactcp_lookupdone);
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err = StrToAddr(host, &ret->hostinfo, mactcp_lookupdone_upp,
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(char *)&done);
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/*
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* PuTTY expects DNS lookups to be synchronous (see bug
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* "async-dns"), so we pretend they are.
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*/
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if (err == cacheFault)
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while (!done)
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continue;
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ret->resolved = TRUE;
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if (ret->hostinfo.rtnCode == noErr)
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realhost = ret->hostinfo.cname;
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else
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realhost = "";
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*canonicalname = smalloc(1+strlen(realhost));
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strcpy(*canonicalname, realhost);
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fprintf(stderr, "canonical name = %s\n", realhost);
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return ret;
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}
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static pascal void mactcp_lookupdone(struct hostInfo *hi, char *cookie)
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{
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volatile int *donep = (int *)cookie;
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*donep = TRUE;
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}
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SockAddr sk_nonamelookup(char *host)
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{
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SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
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ret->resolved = FALSE;
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ret->hostinfo.rtnCode = noErr;
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ret->hostname[0] = '\0';
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strncat(ret->hostname, host, lenof(ret->hostname) - 1);
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return ret;
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}
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void sk_getaddr(SockAddr addr, char *buf, int buflen)
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{
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char mybuf[16];
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OSErr err;
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if (addr->resolved) {
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/* XXX only return first address */
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err = AddrToStr(addr->hostinfo.addr[0], mybuf);
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buf[0] = '\0';
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if (err != noErr)
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strncat(buf, mybuf, buflen - 1);
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} else {
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buf[0] = '\0';
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strncat(buf, addr->hostname, buflen - 1);
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}
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}
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/* I think "local" here really means "loopback" */
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int sk_hostname_is_local(char *name)
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{
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return !strcmp(name, "localhost");
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}
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int sk_address_is_local(SockAddr addr)
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{
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int i;
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if (addr->resolved)
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for (i = 0; i < NUM_ALT_ADDRS; i++)
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if (addr->hostinfo.addr[i] & 0xff000000 == 0x7f000000)
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return TRUE;
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return FALSE;
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}
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int sk_addrtype(SockAddr addr)
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{
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if (addr->resolved)
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return ADDRTYPE_IPV4;
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return ADDRTYPE_NAME;
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}
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void sk_addrcopy(SockAddr addr, char *buf)
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{
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/* XXX only return first address */
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memcpy(buf, &addr->hostinfo.addr[0], 4);
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}
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void sk_addr_free(SockAddr addr)
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{
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sfree(addr);
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}
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static Plug mactcp_plug(Socket sock, Plug p)
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{
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Actual_Socket s = (Actual_Socket) sock;
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Plug ret = s->plug;
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if (p)
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s->plug = p;
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return ret;
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}
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static void mactcp_flush(Socket s)
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{
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fatalbox("sk_tcp_flush");
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}
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Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
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int nodelay, Plug plug)
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{
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static struct socket_function_table fn_table = {
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mactcp_plug,
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mactcp_close,
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mactcp_write,
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mactcp_write_oob,
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mactcp_flush,
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mactcp_set_private_ptr,
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mactcp_get_private_ptr,
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mactcp_set_frozen,
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mactcp_socket_error
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};
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TCPiopb pb;
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UDPiopb upb;
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Actual_Socket ret;
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ip_addr dstaddr;
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size_t buflen;
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fprintf(stderr, "Opening socket, port = %d\n", port);
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/*
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* Create Socket structure.
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*/
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ret = smalloc(sizeof(struct Socket_tag));
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ret->s = 0;
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ret->fn = &fn_table;
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ret->err = noErr;
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ret->plug = plug;
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bufchain_init(&ret->output_data);
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ret->connected = 0; /* to start with */
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ret->writable = 0; /* to start with */
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ret->sending_oob = 0;
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ret->frozen = 0;
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ret->frozen_readable = 0;
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ret->localhost_only = 0; /* unused, but best init anyway */
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ret->pending_error = 0;
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ret->oobinline = oobinline;
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ret->oobpending = FALSE;
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ret->listener = 0;
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dstaddr = addr->hostinfo.addr[0]; /* XXX should try all of them */
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/*
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* Create a TCP stream.
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*
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* MacTCP requires us to provide it with some buffer memory. Page
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* 31 of the Programmer's Guide says it should be a minimum of
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* 4*MTU+1024. Page 36 says a minimum of 4096 bytes. Assume
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* they're both correct.
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*/
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assert(addr->resolved);
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upb.ioCRefNum = mactcp.refnum;
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upb.csCode = UDPMaxMTUSize;
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upb.csParam.mtu.remoteHost = dstaddr;
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upb.csParam.mtu.userDataPtr = NULL;
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ret->err = PBControlSync((ParmBlkPtr)&upb);
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fprintf(stderr, "getting mtu, err = %d\n", ret->err);
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if (ret->err != noErr) return (Socket)ret;
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fprintf(stderr, "Got MTU = %d\n", upb.csParam.mtu.mtuSize);
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buflen = upb.csParam.mtu.mtuSize * 4 + 1024;
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if (buflen < 4096) buflen = 4096;
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pb.ioCRefNum = mactcp.refnum;
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pb.csCode = TCPCreate;
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pb.csParam.create.rcvBuff = smalloc(buflen);
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pb.csParam.create.rcvBuffLen = buflen;
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pb.csParam.create.notifyProc = NULL;
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pb.csParam.create.userDataPtr = (Ptr)ret;
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ret->err = PBControlSync((ParmBlkPtr)&pb);
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if (ret->err != noErr) return (Socket)ret;
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ret->s = pb.tcpStream;
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fprintf(stderr, "stream opened\n");
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/*
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* Open the connection.
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*/
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pb.ioCRefNum = mactcp.refnum;
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pb.csCode = TCPActiveOpen;
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pb.tcpStream = ret->s;
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pb.csParam.open.validityFlags = 0;
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pb.csParam.open.remoteHost = dstaddr;
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pb.csParam.open.remotePort = port;
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pb.csParam.open.localPort = privport ? 1023 : 0;
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pb.csParam.open.dontFrag = FALSE;
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pb.csParam.open.timeToLive = 0;
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pb.csParam.open.security = 0;
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pb.csParam.open.optionCnt = 0;
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pb.csParam.open.userDataPtr = (Ptr)ret;
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while (1) {
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ret->err = PBControlSync((ParmBlkPtr)&pb);
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if (!privport || ret->err != duplicateSocket)
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break;
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pb.csParam.open.localPort--;
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if (pb.csParam.open.localPort == 0)
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break;
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}
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if (ret->err != noErr) return (Socket)ret;
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ret->connected = TRUE;
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ret->writable = TRUE;
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/* Add this to the list of all sockets */
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ret->next = mactcp.socklist;
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ret->prev = &mactcp.socklist;
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mactcp.socklist = ret;
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fprintf(stderr, "Socket connected\n");
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return (Socket)ret;
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}
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static void mactcp_close(Socket sock)
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{
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Actual_Socket s = (Actual_Socket)sock;
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TCPiopb pb;
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/*
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* TCPClose is equivalent to shutdown(fd, SHUT_WR), and hence
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* leaves the Rx side open, while TCPAbort seems rather vicious,
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* throwing away Tx data that haven't been ACKed yet. We do both
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* in succession.
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*/
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pb.ioCRefNum = mactcp.refnum;
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pb.csCode = TCPClose;
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pb.tcpStream = s->s;
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pb.csParam.close.validityFlags = 0;
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pb.csParam.close.userDataPtr = (Ptr)s;
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s->err = PBControlSync((ParmBlkPtr)&pb);
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/* Not much we can do about an error anyway. */
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pb.ioCRefNum = mactcp.refnum;
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pb.csCode = TCPAbort;
|
|
pb.tcpStream = s->s;
|
|
pb.csParam.abort.userDataPtr = (Ptr)s;
|
|
s->err = PBControlSync((ParmBlkPtr)&pb);
|
|
/* Even less we can do about an error here. */
|
|
|
|
pb.ioCRefNum = mactcp.refnum;
|
|
pb.csCode = TCPRelease;
|
|
pb.tcpStream = s->s;
|
|
pb.csParam.create.userDataPtr = (Ptr)s;
|
|
s->err = PBControlSync((ParmBlkPtr)&pb);
|
|
if (s->err == noErr)
|
|
sfree(pb.csParam.create.rcvBuff);
|
|
|
|
/* Unhitch from list of sockets */
|
|
*s->prev = s->next;
|
|
if (s->next != NULL)
|
|
s->next->prev = s->prev;
|
|
|
|
sfree(s);
|
|
}
|
|
|
|
static int mactcp_write(Socket sock, char *buf, int len)
|
|
{
|
|
Actual_Socket s = (Actual_Socket) sock;
|
|
wdsEntry wds[2];
|
|
TCPiopb pb;
|
|
|
|
wds[0].length = len;
|
|
wds[0].ptr = buf;
|
|
wds[1].length = 0;
|
|
|
|
pb.ioCRefNum = mactcp.refnum;
|
|
pb.csCode = TCPSend;
|
|
pb.tcpStream = s->s;
|
|
pb.csParam.send.validityFlags = 0;
|
|
pb.csParam.send.pushFlag = TRUE; /* XXX we want it to return. */
|
|
pb.csParam.send.urgentFlag = 0;
|
|
pb.csParam.send.wdsPtr = (Ptr)wds;
|
|
pb.csParam.send.userDataPtr = (Ptr)s;
|
|
s->err = PBControlSync((ParmBlkPtr)&pb);
|
|
return 0;
|
|
}
|
|
|
|
static int mactcp_write_oob(Socket sock, char *buf, int len)
|
|
{
|
|
|
|
fatalbox("mactcp_write_oob");
|
|
}
|
|
|
|
/*
|
|
* Called from our event loop if there's work to do.
|
|
*/
|
|
void mactcp_poll(void)
|
|
{
|
|
Actual_Socket s;
|
|
TCPiopb pb;
|
|
|
|
for (s = mactcp.socklist; s != NULL; s = s->next) {
|
|
/* XXX above can't handle sockets being deleted. */
|
|
pb.ioCRefNum = mactcp.refnum;
|
|
pb.csCode = TCPStatus;
|
|
pb.tcpStream = s->s;
|
|
pb.csParam.status.userDataPtr = (Ptr)s;
|
|
s->err = PBControlSync((ParmBlkPtr)&pb);
|
|
if (s->err != noErr)
|
|
continue;
|
|
if (pb.csParam.status.amtUnreadData > 0)
|
|
mactcp_recv(s, pb.csParam.status.amtUnreadData);
|
|
/* Should check connectionState in case remote has closed */
|
|
}
|
|
}
|
|
|
|
static void mactcp_recv(Actual_Socket s, size_t len)
|
|
{
|
|
rdsEntry rds[2];
|
|
TCPiopb pb;
|
|
|
|
if (s->frozen) return;
|
|
|
|
while (len > 0) {
|
|
pb.ioCRefNum = mactcp.refnum;
|
|
pb.csCode = TCPNoCopyRcv;
|
|
pb.tcpStream = s->s;
|
|
pb.csParam.receive.commandTimeoutValue = 0;
|
|
pb.csParam.receive.rdsPtr = (Ptr)rds;
|
|
pb.csParam.receive.rdsLength = lenof(rds) - 1;
|
|
pb.csParam.receive.userDataPtr = (Ptr)s;
|
|
s->err = PBControlSync((ParmBlkPtr)&pb);
|
|
if (s->err != noErr)
|
|
return;
|
|
plug_receive(s->plug, 0, rds[0].ptr, rds[0].length);
|
|
len -= rds[0].length;
|
|
pb.csCode = TCPRcvBfrReturn;
|
|
s->err = PBControlSync((ParmBlkPtr)&pb);
|
|
if (s->err != noErr)
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Each socket abstraction contains a `void *' private field in
|
|
* which the client can keep state.
|
|
*/
|
|
static void mactcp_set_private_ptr(Socket sock, void *ptr)
|
|
{
|
|
Actual_Socket s = (Actual_Socket) sock;
|
|
s->private_ptr = ptr;
|
|
}
|
|
|
|
static void *mactcp_get_private_ptr(Socket sock)
|
|
{
|
|
Actual_Socket s = (Actual_Socket) sock;
|
|
return s->private_ptr;
|
|
}
|
|
|
|
/*
|
|
* Special error values are returned from sk_namelookup and sk_new
|
|
* if there's a problem. These functions extract an error message,
|
|
* or return NULL if there's no problem.
|
|
*/
|
|
char *sk_addr_error(SockAddr addr)
|
|
{
|
|
static char buf[64];
|
|
|
|
switch (addr->hostinfo.rtnCode) {
|
|
case noErr:
|
|
return NULL;
|
|
case nameSyntaxErr:
|
|
return "Name syntax error";
|
|
case noNameServer:
|
|
return "No name server found";
|
|
case authNameErr:
|
|
return "Domain name does not exist";
|
|
case noAnsErr:
|
|
return "No answer from domain name server";
|
|
case dnrErr:
|
|
return "Domain name server returned an error";
|
|
case outOfMemory:
|
|
return "Out of memory";
|
|
default:
|
|
sprintf(buf, "Unknown DNR error %d", addr->hostinfo.rtnCode);
|
|
return buf;
|
|
}
|
|
}
|
|
|
|
static char *mactcp_socket_error(Socket sock)
|
|
{
|
|
static char buf[64];
|
|
Actual_Socket s = (Actual_Socket) sock;
|
|
|
|
switch (s->err) {
|
|
case noErr:
|
|
return NULL;
|
|
case insufficientResources:
|
|
return "Insufficient resources to open TCP stream";
|
|
case duplicateSocket:
|
|
return "Duplicate socket";
|
|
case openFailed:
|
|
return "Connection failed while opening";
|
|
default:
|
|
sprintf(buf, "Unknown MacTCP error %d", s->err);
|
|
return buf;
|
|
}
|
|
}
|
|
|
|
static void mactcp_set_frozen(Socket sock, int is_frozen)
|
|
{
|
|
Actual_Socket s = (Actual_Socket) sock;
|
|
|
|
if (s->frozen == is_frozen)
|
|
return;
|
|
s->frozen = is_frozen;
|
|
}
|
|
|
|
/*
|
|
* Bits below here would usually be in dnr.c, shipped with the MacTCP
|
|
* SDK, but its convenient not to require that, and since we assume
|
|
* System 7 we can actually simplify things a lot.
|
|
*/
|
|
|
|
static OSErr OpenResolver(char *hosts_file)
|
|
{
|
|
short vrefnum;
|
|
long dirid;
|
|
HParamBlockRec pb;
|
|
Str255 filename;
|
|
OSErr err;
|
|
int fd;
|
|
Handle dnr_handle;
|
|
|
|
if (mactcp.dnr_handle != NULL)
|
|
return noErr;
|
|
|
|
err = FindFolder(kOnSystemDisk, kControlPanelFolderType, FALSE, &vrefnum,
|
|
&dirid);
|
|
if (err != noErr) return err;
|
|
|
|
/*
|
|
* Might be better to use PBCatSearch here, but it's not always
|
|
* available.
|
|
*/
|
|
pb.fileParam.ioCompletion = NULL;
|
|
pb.fileParam.ioNamePtr = filename;
|
|
pb.fileParam.ioVRefNum = vrefnum;
|
|
pb.fileParam.ioFDirIndex = 1;
|
|
pb.fileParam.ioDirID = dirid;
|
|
fd = -1;
|
|
|
|
while (PBHGetFInfoSync(&pb) == noErr) {
|
|
if (pb.fileParam.ioFlFndrInfo.fdType == 'cdev' &&
|
|
pb.fileParam.ioFlFndrInfo.fdCreator == 'ztcp') {
|
|
fd = HOpenResFile(vrefnum, dirid, filename, fsRdPerm);
|
|
if (fd == -1) continue;
|
|
dnr_handle = Get1IndResource('dnrp', 1);
|
|
if (dnr_handle != NULL)
|
|
break;
|
|
CloseResFile(fd);
|
|
fd = -1;
|
|
}
|
|
pb.fileParam.ioDirID = dirid;
|
|
pb.fileParam.ioFDirIndex++;
|
|
}
|
|
if (fd == -1)
|
|
return fnfErr;
|
|
|
|
DetachResource(dnr_handle);
|
|
CloseResFile(fd);
|
|
|
|
MoveHHi(dnr_handle);
|
|
HLock(dnr_handle);
|
|
|
|
err = InvokeOpenResolverUPP(OPENRESOLVER, hosts_file,
|
|
(OpenResolverUPP)*dnr_handle);
|
|
if (err != noErr) {
|
|
HUnlock(dnr_handle);
|
|
DisposeHandle(dnr_handle);
|
|
return err;
|
|
}
|
|
|
|
mactcp.dnr_handle = dnr_handle;
|
|
return noErr;
|
|
}
|
|
|
|
OSErr CloseResolver(void)
|
|
{
|
|
Handle dnr_handle = mactcp.dnr_handle;
|
|
OSErr err;
|
|
|
|
if (mactcp.dnr_handle == NULL)
|
|
return notOpenErr;
|
|
|
|
err = InvokeCloseResolverUPP(CLOSERESOLVER,
|
|
(CloseResolverUPP)*mactcp.dnr_handle);
|
|
if (err != noErr)
|
|
return err;
|
|
|
|
mactcp.dnr_handle = NULL;
|
|
HUnlock(dnr_handle);
|
|
DisposeHandle(dnr_handle);
|
|
return noErr;
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-file-style: "simon"
|
|
* End:
|
|
*/
|