/* * xdr_stdio.c, XDR implementation on standard i/o file. * * 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. * * This set of routines implements a XDR on a stdio stream. * XDR_ENCODE serializes onto the stream, XDR_DECODE de-serializes * from the stream. */ #include <rpc/types.h> #include <stdio.h> #include <rpc/xdr.h> #include <libio/iolibio.h> #define fflush(s) _IO_fflush (s) #define fread(p, m, n, s) _IO_fread (p, m, n, s) #define ftell(s) _IO_ftell (s) #define fwrite(p, m, n, s) _IO_fwrite (p, m, n, s) static bool_t xdrstdio_getlong (XDR *, long *); static bool_t xdrstdio_putlong (XDR *, const long *); static bool_t xdrstdio_getbytes (XDR *, caddr_t, u_int); static bool_t xdrstdio_putbytes (XDR *, const char *, u_int); static u_int xdrstdio_getpos (const XDR *); static bool_t xdrstdio_setpos (XDR *, u_int); static int32_t *xdrstdio_inline (XDR *, u_int); static void xdrstdio_destroy (XDR *); static bool_t xdrstdio_getint32 (XDR *, int32_t *); static bool_t xdrstdio_putint32 (XDR *, const int32_t *); /* * Ops vector for stdio type XDR */ static const struct xdr_ops xdrstdio_ops = { xdrstdio_getlong, /* deserialize a long int */ xdrstdio_putlong, /* serialize a long int */ xdrstdio_getbytes, /* deserialize counted bytes */ xdrstdio_putbytes, /* serialize counted bytes */ xdrstdio_getpos, /* get offset in the stream */ xdrstdio_setpos, /* set offset in the stream */ xdrstdio_inline, /* prime stream for inline macros */ xdrstdio_destroy, /* destroy stream */ xdrstdio_getint32, /* deserialize a int */ xdrstdio_putint32 /* serialize a int */ }; /* * Initialize a stdio xdr stream. * Sets the xdr stream handle xdrs for use on the stream file. * Operation flag is set to op. */ void xdrstdio_create (XDR *xdrs, FILE *file, 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 *) &xdrstdio_ops; xdrs->x_private = (caddr_t) file; xdrs->x_handy = 0; xdrs->x_base = 0; } /* * Destroy a stdio xdr stream. * Cleans up the xdr stream handle xdrs previously set up by xdrstdio_create. */ static void xdrstdio_destroy (XDR *xdrs) { (void) fflush ((FILE *) xdrs->x_private); /* xx should we close the file ?? */ }; static bool_t xdrstdio_getlong (XDR *xdrs, long *lp) { u_int32_t mycopy; if (fread ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1) return FALSE; *lp = (long) ntohl (mycopy); return TRUE; } static bool_t xdrstdio_putlong (XDR *xdrs, const long *lp) { int32_t mycopy = htonl ((u_int32_t) *lp); if (fwrite ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1) return FALSE; return TRUE; } static bool_t xdrstdio_getbytes (XDR *xdrs, const caddr_t addr, u_int len) { if ((len != 0) && (fread (addr, (int) len, 1, (FILE *) xdrs->x_private) != 1)) return FALSE; return TRUE; } static bool_t xdrstdio_putbytes (XDR *xdrs, const char *addr, u_int len) { if ((len != 0) && (fwrite (addr, (int) len, 1, (FILE *) xdrs->x_private) != 1)) return FALSE; return TRUE; } static u_int xdrstdio_getpos (const XDR *xdrs) { return (u_int) ftell ((FILE *) xdrs->x_private); } static bool_t xdrstdio_setpos (XDR *xdrs, u_int pos) { return fseek ((FILE *) xdrs->x_private, (long) pos, 0) < 0 ? FALSE : TRUE; } static int32_t * xdrstdio_inline (XDR *xdrs, u_int len) { /* * Must do some work to implement this: must insure * enough data in the underlying stdio buffer, * that the buffer is aligned so that we can indirect through a * long *, and stuff this pointer in xdrs->x_buf. Doing * a fread or fwrite to a scratch buffer would defeat * most of the gains to be had here and require storage * management on this buffer, so we don't do this. */ return NULL; } static bool_t xdrstdio_getint32 (XDR *xdrs, int32_t *ip) { int32_t mycopy; if (fread ((caddr_t) &mycopy, 4, 1, (FILE *) xdrs->x_private) != 1) return FALSE; *ip = ntohl (mycopy); return TRUE; } static bool_t xdrstdio_putint32 (XDR *xdrs, const int32_t *ip) { int32_t mycopy = htonl (*ip); ip = &mycopy; if (fwrite ((caddr_t) ip, 4, 1, (FILE *) xdrs->x_private) != 1) return FALSE; return TRUE; } #ifdef EXPORT_RPC_SYMBOLS libc_hidden_def (xdrstdio_create) #else libc_hidden_nolink_sunrpc (xdrstdio_create, GLIBC_2_0) #endif