mirror of
https://git.tartarus.org/simon/putty.git
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Beginnings of a MacTCP network layer. This has all of the DNS interface
present, including stuff to find and load the MacTCP DNR. Actually making a TCP connection is still unimplemented, though, and much testing remains to be done. [originally from svn r2452]
This commit is contained in:
Ben Harris
parent
94b7de24f1
commit
ba15f25503
439
mac/mtcpnet.c
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439
mac/mtcpnet.c
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/*
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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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#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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};
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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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} mactcp;
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static pascal void mactcp_lookupdone(struct hostInfo *hi, char *cookie);
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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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* I think the MacTCP INIT ensures that .IPP is already open (and
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* hence has a valid unit number already) so we don't need to go
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* through all that.
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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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/* 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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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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/* 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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}
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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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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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fatalbox("sk_new");
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}
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/*
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* Special error values are returned from sk_namelookup and sk_new
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* if there's a problem. These functions extract an error message,
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* or return NULL if there's no problem.
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*/
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char *sk_addr_error(SockAddr addr)
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{
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static char buf[64];
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switch (addr->hostinfo.rtnCode) {
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case noErr:
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return NULL;
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case nameSyntaxErr:
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return "Name syntax error";
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case noNameServer:
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return "No name server found";
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case authNameErr:
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return "Domain name does not exist";
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case noAnsErr:
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return "No answer from domain name server";
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case dnrErr:
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return "Domain name server returned an error";
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case outOfMemory:
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return "Out of memory";
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default:
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sprintf(buf, "Unknown DNR error %d", addr->hostinfo.rtnCode);
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return buf;
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}
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}
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/*
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* Bits below here would usually be in dnr.c, shipped with the MacTCP
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* SDK, but its convenient not to require that, and since we assume
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* System 7 we can actually simplify things a lot.
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*/
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static OSErr OpenResolver(char *hosts_file)
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{
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short vrefnum;
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long dirid;
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HParamBlockRec pb;
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Str255 filename;
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OSErr err;
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int fd;
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Handle dnr_handle;
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if (mactcp.dnr_handle != NULL)
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return noErr;
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err = FindFolder(kOnSystemDisk, kControlPanelFolderType, FALSE, &vrefnum,
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&dirid);
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if (err != noErr) return err;
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/*
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* Might be better to use PBCatSearch here, but it's not always
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* available.
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*/
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pb.fileParam.ioCompletion = NULL;
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pb.fileParam.ioNamePtr = filename;
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pb.fileParam.ioVRefNum = vrefnum;
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pb.fileParam.ioFDirIndex = 1;
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pb.fileParam.ioDirID = dirid;
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fd = -1;
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while (PBHGetFInfo(&pb, FALSE) == noErr) {
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if (pb.fileParam.ioFlFndrInfo.fdType == 'cdev' &&
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pb.fileParam.ioFlFndrInfo.fdCreator == 'ztcp') {
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fd = HOpenResFile(vrefnum, dirid, filename, fsRdPerm);
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if (fd == -1) continue;
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dnr_handle = Get1IndResource('dnrp', 1);
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if (dnr_handle != NULL)
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break;
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CloseResFile(fd);
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fd = -1;
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}
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pb.fileParam.ioDirID = dirid;
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pb.fileParam.ioFDirIndex++;
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}
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if (fd == -1)
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return fnfErr;
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DetachResource(dnr_handle);
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CloseResFile(fd);
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MoveHHi(dnr_handle);
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HLock(dnr_handle);
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err = InvokeOpenResolverUPP(OPENRESOLVER, hosts_file,
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(OpenResolverUPP)*dnr_handle);
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if (err != noErr) {
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HUnlock(dnr_handle);
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DisposeHandle(dnr_handle);
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return err;
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}
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mactcp.dnr_handle = dnr_handle;
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return noErr;
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}
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OSErr CloseResolver(void)
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{
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Handle dnr_handle = mactcp.dnr_handle;
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OSErr err;
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if (mactcp.dnr_handle == NULL)
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return notOpenErr;
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err = InvokeCloseResolverUPP(CLOSERESOLVER,
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(CloseResolverUPP)*mactcp.dnr_handle);
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if (err != noErr)
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return err;
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mactcp.dnr_handle = NULL;
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HUnlock(dnr_handle);
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DisposeHandle(dnr_handle);
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return noErr;
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}
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/*
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* Local Variables:
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* c-file-style: "simon"
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* End:
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*/
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