diff options
Diffstat (limited to 'REORG.TODO/sunrpc/xdr_mem.c')
| -rw-r--r-- | REORG.TODO/sunrpc/xdr_mem.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/REORG.TODO/sunrpc/xdr_mem.c b/REORG.TODO/sunrpc/xdr_mem.c new file mode 100644 index 0000000000..46a1f6f190 --- /dev/null +++ b/REORG.TODO/sunrpc/xdr_mem.c @@ -0,0 +1,239 @@ +/* + * xdr_mem.c, XDR implementation using memory buffers. + * + * Copyright (c) 2010, Oracle America, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * * Neither the name of the "Oracle America, Inc." nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * If you have some data to be interpreted as external data representation + * or to be converted to external data representation in a memory buffer, + * then this is the package for you. + */ + +#include <string.h> +#include <limits.h> +#include <rpc/rpc.h> +#include <shlib-compat.h> + +static bool_t xdrmem_getlong (XDR *, long *); +static bool_t xdrmem_putlong (XDR *, const long *); +static bool_t xdrmem_getbytes (XDR *, caddr_t, u_int); +static bool_t xdrmem_putbytes (XDR *, const char *, u_int); +static u_int xdrmem_getpos (const XDR *); +static bool_t xdrmem_setpos (XDR *, u_int); +static int32_t *xdrmem_inline (XDR *, u_int); +static void xdrmem_destroy (XDR *); +static bool_t xdrmem_getint32 (XDR *, int32_t *); +static bool_t xdrmem_putint32 (XDR *, const int32_t *); + +static const struct xdr_ops xdrmem_ops = +{ + xdrmem_getlong, + xdrmem_putlong, + xdrmem_getbytes, + xdrmem_putbytes, + xdrmem_getpos, + xdrmem_setpos, + xdrmem_inline, + xdrmem_destroy, + xdrmem_getint32, + xdrmem_putint32 +}; + +/* + * The procedure xdrmem_create initializes a stream descriptor for a + * memory buffer. + */ +void +xdrmem_create (XDR *xdrs, const caddr_t addr, u_int size, enum xdr_op op) +{ + xdrs->x_op = op; + /* We have to add the const since the `struct xdr_ops' in `struct XDR' + is not `const'. */ + xdrs->x_ops = (struct xdr_ops *) &xdrmem_ops; + xdrs->x_private = xdrs->x_base = addr; + xdrs->x_handy = size; +} +#ifdef EXPORT_RPC_SYMBOLS +libc_hidden_def (xdrmem_create) +#else +libc_hidden_nolink_sunrpc (xdrmem_create, GLIBC_2_0) +#endif + +/* + * Nothing needs to be done for the memory case. The argument is clearly + * const. + */ + +static void +xdrmem_destroy (XDR *xdrs) +{ +} + +/* + * Gets the next word from the memory referenced by xdrs and places it + * in the long pointed to by lp. It then increments the private word to + * point at the next element. Neither object pointed to is const + */ +static bool_t +xdrmem_getlong (XDR *xdrs, long *lp) +{ + if (xdrs->x_handy < 4) + return FALSE; + xdrs->x_handy -= 4; + *lp = (int32_t) ntohl ((*((int32_t *) (xdrs->x_private)))); + xdrs->x_private += 4; + return TRUE; +} + +/* + * Puts the long pointed to by lp in the memory referenced by xdrs. It + * then increments the private word to point at the next element. The + * long pointed at is const + */ +static bool_t +xdrmem_putlong (XDR *xdrs, const long *lp) +{ + if (xdrs->x_handy < 4) + return FALSE; + xdrs->x_handy -= 4; + *(int32_t *) xdrs->x_private = htonl (*lp); + xdrs->x_private += 4; + return TRUE; +} + +/* + * Gets an unaligned number of bytes from the xdrs structure and writes them + * to the address passed in addr. Be very careful when calling this routine + * as it could leave the xdrs pointing to an unaligned structure which is not + * a good idea. None of the things pointed to are const. + */ +static bool_t +xdrmem_getbytes (XDR *xdrs, caddr_t addr, u_int len) +{ + if (xdrs->x_handy < len) + return FALSE; + xdrs->x_handy -= len; + memcpy (addr, xdrs->x_private, len); + xdrs->x_private += len; + return TRUE; +} + +/* + * The complementary function to the above. The same warnings apply about + * unaligned data. The source address is const. + */ +static bool_t +xdrmem_putbytes (XDR *xdrs, const char *addr, u_int len) +{ + if (xdrs->x_handy < len) + return FALSE; + xdrs->x_handy -= len; + memcpy (xdrs->x_private, addr, len); + xdrs->x_private += len; + return TRUE; +} + +/* + * Not sure what this one does. But it clearly doesn't modify the contents + * of xdrs. **FIXME** does this not assume u_int == u_long? + */ +static u_int +xdrmem_getpos (const XDR *xdrs) +{ + return (u_long) xdrs->x_private - (u_long) xdrs->x_base; +} + +/* + * xdrs modified + */ +static bool_t +xdrmem_setpos (XDR *xdrs, u_int pos) +{ + caddr_t newaddr = xdrs->x_base + pos; + caddr_t lastaddr = xdrs->x_private + xdrs->x_handy; + size_t handy = lastaddr - newaddr; + + if (newaddr > lastaddr + || newaddr < xdrs->x_base + || handy != (u_int) handy) + return FALSE; + + xdrs->x_private = newaddr; + xdrs->x_handy = (u_int) handy; + return TRUE; +} + +/* + * xdrs modified + */ +static int32_t * +xdrmem_inline (XDR *xdrs, u_int len) +{ + int32_t *buf = 0; + + if (xdrs->x_handy >= len) + { + xdrs->x_handy -= len; + buf = (int32_t *) xdrs->x_private; + xdrs->x_private += len; + } + return buf; +} + +/* + * Gets the next word from the memory referenced by xdrs and places it + * in the int pointed to by ip. It then increments the private word to + * point at the next element. Neither object pointed to is const + */ +static bool_t +xdrmem_getint32 (XDR *xdrs, int32_t *ip) +{ + if (xdrs->x_handy < 4) + return FALSE; + xdrs->x_handy -= 4; + *ip = ntohl ((*((int32_t *) (xdrs->x_private)))); + xdrs->x_private += 4; + return TRUE; +} + +/* + * Puts the long pointed to by lp in the memory referenced by xdrs. It + * then increments the private word to point at the next element. The + * long pointed at is const + */ +static bool_t +xdrmem_putint32 (XDR *xdrs, const int32_t *ip) +{ + if (xdrs->x_handy < 4) + return FALSE; + xdrs->x_handy -= 4; + *(int32_t *) xdrs->x_private = htonl (*ip); + xdrs->x_private += 4; + return TRUE; +} |