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/*********************************************************
* Copyright (C) 2008-2015 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
#ifndef _XDRUTIL_H_
#define _XDRUTIL_H_
/*
* xdrutil.h --
*
* Utility functions for code that uses XDR to encode/decode data.
*/
#include <rpc/rpc.h>
#include "vm_basic_types.h"
#include "util.h"
/*
* Helper macros for iterating over an rpcgen-generated array. Given a struct S:
*
* struct S {
* struct {
* u_int f_len;
* T *f_val;
* } f;
* };
*
* Iterate over the array like this:
*
* S s;
* u_int i;
*
* XDRUTIL_FOREACH(i, &s, f) {
* T *t = XDRUTIL_GETITEM(&s, f, i);
* }
*
* 'f' should be a string with the field name.
*/
#define XDRUTIL_COUNT(ptr, field) ((ptr)->field.field##_len)
#define XDRUTIL_FOREACH(counter, ptr, field) \
for ((counter) = 0; (counter) < XDRUTIL_COUNT(ptr, field); (counter)++)
#define XDRUTIL_GETITEM(ptr, field, idx) &((ptr)->field.field##_val[idx])
/*
* Wrapper for XdrUtil_ArrayAppend that automatically populates the arguments
* from a given XDR array.
*/
#ifdef __GNUC__
# define XDRUTIL_ARRAYAPPEND(ptr, field, cnt) \
(typeof ((ptr)->field.field##_val)) \
XdrUtil_ArrayAppend((void **) &(ptr)->field.field##_val, \
&(ptr)->field.field##_len, \
sizeof *(ptr)->field.field##_val, \
(cnt))
#else
# define XDRUTIL_ARRAYAPPEND(ptr, field, cnt) \
XdrUtil_ArrayAppend((void **) &(ptr)->field.field##_val, \
&(ptr)->field.field##_len, \
sizeof *(ptr)->field.field##_val, \
(cnt))
#endif
/*
* Macros for assigning to XDR optional strings, opaque fields, and
* optional opaque fields.
*
* Usage:
* // XDR
* struct MyFoo { string *foo; };
* struct MyBar { opaque bar; };
* struct MyOptBar { opaque *bar; };
*
* // C
* char buf[] = { 0xca, 0xfe, 0xba, 0xbe, 0x80, 0x08 };
*
* MyFoo foo;
* XDRUTIL_STRING_OPT(&foo.foo, "Hello, world!");
*
* MyBar bar;
* XDRUTIL_OPAQUE(&bar.bar, buf, sizeof buf);
*
* MyOptBar obar;
* XDRUTIL_OPAQUE_OPT(&obar.bar, buf, sizeof buf);
*/
#define XDRUTIL_STRING_OPT(ptr, src) do { \
(ptr) = Util_SafeMalloc(sizeof *(ptr)); \
*(ptr) = Util_SafeStrdup((src)); \
} while (0)
#define XDRUTIL_OPAQUE(ptr, src, srcSize) do { \
struct { u_int len; char *val; } __opaque_temp = {(srcSize), NULL}; \
ASSERT_ON_COMPILE(sizeof(*(ptr)) == sizeof(__opaque_temp)); \
\
__opaque_temp.val = Util_SafeMalloc((srcSize)); \
memcpy(__opaque_temp.val, (src), (srcSize)); \
memcpy(ptr, &__opaque_temp, sizeof __opaque_temp); \
} while (0)
#define XDRUTIL_OPAQUE_OPT(ptr, src, srcSize) do { \
*(ptr) = Util_SafeMalloc(sizeof (struct { u_len; void*; })); \
XDRUTIL_OPAQUE(*(ptr), (src), (srcSize)); \
} while(0)
void *
XdrUtil_ArrayAppend(void **array, u_int *arrayLen, size_t elemSz, u_int elemCnt);
Bool
XdrUtil_Deserialize(const void *data, size_t dataLen, void *xdrProc, void *dest);
#endif /* _XDRUTIL_H_ */
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