[u/mdw/putty] / mac / mtcpnet.c

/*
 * Copyright (c) 2003 Ben Harris
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
/*
 * mtcpnet.c - MacTCP interface
 */

#include <MacTypes.h>
#include <Devices.h>
#include <Endian.h>
#include <Folders.h>
#include <MacTCP.h>
#include <MixedMode.h>
#include <Resources.h>

#include <assert.h>

#include "putty.h"
#include "network.h"
#include "mac.h"

/*
 * The following structures are documented as being in
 * <AddressXlation.h>, but that isn't shipped with Universal
 * Interfaces, and it's easier to define them here than to require
 * people to download yet another SDK.
 */

static OSErr OpenResolver(char *);
static OSErr CloseResolver(void);

enum {
    OPENRESOLVER = 1,
    CLOSERESOLVER,
    STRTOADDR,
    ADDRTOSTR,
    ENUMCACHE,
    ADDRTONAME,
    HXINFO,
    MXINFO
};

#define NUM_ALT_ADDRS 4

typedef struct hostInfo {
    int rtnCode;
    char cname[255];
    unsigned long addr[NUM_ALT_ADDRS];
};

typedef CALLBACK_API(void, ResultProcPtr)(struct hostInfo *, char *);
typedef STACK_UPP_TYPE(ResultProcPtr) ResultUPP;
enum { uppResultProcInfo = kPascalStackBased
       | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(struct hostInfo*)))
       | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
};
#define NewResultUPP(userRoutine)					\
    (ResultUPP)NewRoutineDescriptor((ProcPtr)(userRoutine),		\
				    uppResultProcInfo,			\
				    GetCurrentArchitecture())
#define DisposeResultUPP(userUPP) DisposeRoutineDescriptor(userUPP)

static OSErr StrToAddr(char *, struct hostInfo *, ResultUPP *, char *);

typedef CALLBACK_API_C(OSErr, OpenResolverProcPtr)(UInt32, char *);
typedef STACK_UPP_TYPE(OpenResolverProcPtr) OpenResolverUPP;
enum { uppOpenResolverProcInfo = kCStackBased
       | RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
       | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32)))
       | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char*)))
};
#define InvokeOpenResolverUPP(selector, fileName, userUPP)		\
    CALL_TWO_PARAMETER_UPP((userUPP), uppOpenResolverProcInfo,		\
			   (selector), (fileName))

typedef CALLBACK_API_C(OSErr, CloseResolverProcPtr)(UInt32);
typedef STACK_UPP_TYPE(CloseResolverProcPtr) CloseResolverUPP;
enum { uppCloseResolverProcInfo = kCStackBased
       | RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
       | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32)))
};
#define InvokeCloseResolverUPP(selector, userUPP)			\
    CALL_ONE_PARAMETER_UPP((userUPP), uppCloseResolverProcInfo, (selector))

typedef CALLBACK_API_C(OSErr, StrToAddrProcPtr)(UInt32, char *,
						struct hostInfo *, ResultUPP,
						char *);
typedef STACK_UPP_TYPE(StrToAddrProcPtr) StrToAddrUPP;
enum { uppStrToAddrProcInfo = kCStackBased
       | RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
       | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(UInt32)))
       | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
       | STACK_ROUTINE_PARAMETER(3, SIZE_CODE(sizeof(struct hostInfo *)))
       | STACK_ROUTINE_PARAMETER(4, SIZE_CODE(sizeof(ResultUPP)))
       | STACK_ROUTINE_PARAMETER(5, SIZE_CODE(sizeof(char *)))
};
#define InvokeStrToAddrUPP(selector, hostName, hostInfoPtr, ResultProc,	\
			   userDataPtr, userUPP)			\
    CALL_FIVE_PARAMETER_UPP((userUPP), uppStrToAddrProcInfo, (selector),\
			    (hostName), (hostInfoPtr), (ResultProc),	\
			    (userDataPtr))
#define StrToAddr(hostName, hostInfoPtr, ResultProc, userDataPtr)	\
    InvokeStrToAddrUPP(STRTOADDR, hostName, hostInfoPtr, ResultProc,	\
		       userDataPtr, (StrToAddrUPP)*mactcp.dnr_handle)

typedef CALLBACK_API_C(OSErr, AddrToStrProcPtr)(UInt32, unsigned long, char *);
typedef STACK_UPP_TYPE(AddrToStrProcPtr) AddrToStrUPP;
enum { uppAddrToStrProcInfo = kCStackBased
       | RESULT_SIZE(SIZE_CODE(sizeof(OSErr)))
       | STACK_ROUTINE_PARAMETER(1, SIZE_CODE(sizeof(unsigned long)))
       | STACK_ROUTINE_PARAMETER(2, SIZE_CODE(sizeof(char *)))
};
#define InvokeAddrToStrUPP(selector, addr, addrStr, userUPP)		\
    CALL_THREE_PARAMETER_UPP((userUPP), uppAddrToStrProcInfo, (selector),\
			     (addr), (addrStr))
#define AddrToStr(addr, addrStr)					\
    InvokeAddrToStrUPP(ADDRTOSTR, addr, addrStr,			\
		       (AddrToStrUPP)*mactcp.dnr_handle)

/* End of AddressXlation.h bits */

struct Socket_tag {
    struct socket_function_table *fn;
    /* the above variable absolutely *must* be the first in this structure */
};

/*
 * We used to typedef struct Socket_tag *Socket.
 *
 * Since we have made the networking abstraction slightly more
 * abstract, Socket no longer means a tcp socket (it could mean
 * an ssl socket).  So now we must use Actual_Socket when we know
 * we are talking about a tcp socket.
 */
typedef struct Socket_tag *Actual_Socket;

struct SockAddr_tag {
    int resolved;
    struct hostInfo hostinfo;
    char hostname[512];
};

/* Global variables */
static struct {
    Handle dnr_handle;
    int initialised;
    short refnum;
} mactcp;

static pascal void mactcp_lookupdone(struct hostInfo *hi, char *cookie);

/*
 * Initialise MacTCP.
 * This should be called once before any TCP connection is opened.
 */

OSErr mactcp_init(void)
{
    OSErr err;

    /*
     * IM:Devices describes a convoluted way of finding a spare unit
     * number to open a driver on before calling OpenDriver.  Happily,
     * I think the MacTCP INIT ensures that .IPP is already open (and
     * hence has a valid unit number already) so we don't need to go
     * through all that.
     */
    err = OpenDriver("\p.IPP", &mactcp.refnum);
    if (err != noErr) return err;
    err = OpenResolver(NULL);
    if (err != noErr) return err;

    mactcp.initialised = TRUE;
    return noErr;
}

void mactcp_shutdown(void)
{

    CloseResolver();
    mactcp.initialised = FALSE;
}

static ResultUPP mactcp_lookupdone_upp;

SockAddr sk_namelookup(char *host, char **canonicalname)
{
    SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
    OSErr err;
    volatile int done = FALSE;
    char *realhost;

    /* Clear the structure. */
    memset(ret, 0, sizeof(struct SockAddr_tag));
    if (mactcp_lookupdone_upp == NULL)
	mactcp_lookupdone_upp = NewResultUPP(&mactcp_lookupdone);
    err = StrToAddr(host, &ret->hostinfo, mactcp_lookupdone_upp,
		    (char *)&done);
    /*
     * PuTTY expects DNS lookups to be synchronous (see bug
     * "async-dns"), so we pretend they are.
     */
    if (err == cacheFault)
	while (!done)
	    continue;
    ret->resolved = TRUE;
    
    if (ret->hostinfo.rtnCode == noErr)
	realhost = ret->hostinfo.cname;
    else
	realhost = "";
    *canonicalname = smalloc(1+strlen(realhost));
    strcpy(*canonicalname, realhost);
    return ret;
}

static pascal void mactcp_lookupdone(struct hostInfo *hi, char *cookie)
{
    volatile int *donep = (int *)cookie;

    *donep = TRUE;
}

SockAddr sk_nonamelookup(char *host)
{
    SockAddr ret = smalloc(sizeof(struct SockAddr_tag));

    ret->resolved = FALSE;
    ret->hostinfo.rtnCode = noErr;
    ret->hostname[0] = '\0';
    strncat(ret->hostname, host, lenof(ret->hostname) - 1);
    return ret;
}

void sk_getaddr(SockAddr addr, char *buf, int buflen)
{
    char mybuf[16];
    OSErr err;

    /* XXX only return first address */
    err = AddrToStr(addr->hostinfo.addr[0], mybuf);
    buf[0] = '\0';
    if (err != noErr)
	strncat(buf, mybuf, buflen - 1);
}

/* I think "local" here really means "loopback" */

int sk_hostname_is_local(char *name)
{

    return !strcmp(name, "localhost");
}

int sk_address_is_local(SockAddr addr)
{
    int i;

    if (addr->resolved)
	for (i = 0; i < NUM_ALT_ADDRS; i++)
	    if (addr->hostinfo.addr[i] & 0xff000000 == 0x7f000000)
		return TRUE;
    return FALSE;
}

int sk_addrtype(SockAddr addr)
{

    if (addr->resolved)
	return ADDRTYPE_IPV4;
    return ADDRTYPE_NAME;
}

void sk_addrcopy(SockAddr addr, char *buf)
{

    /* XXX only return first address */
    memcpy(buf, &addr->hostinfo.addr[0], 4);
}

void sk_addr_free(SockAddr addr)
{

    sfree(addr);
}

Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
	      int nodelay, Plug plug)
{

    fatalbox("sk_new");
}

/*
 * 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;
    }
}


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