diff options
Diffstat (limited to 'cpukit/librpc/src/xdr/xdr.c')
| -rw-r--r-- | cpukit/librpc/src/xdr/xdr.c | 860 |
1 files changed, 860 insertions, 0 deletions
diff --git a/cpukit/librpc/src/xdr/xdr.c b/cpukit/librpc/src/xdr/xdr.c new file mode 100644 index 0000000000..02631e60ef --- /dev/null +++ b/cpukit/librpc/src/xdr/xdr.c @@ -0,0 +1,860 @@ +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)xdr.c 1.35 87/08/12";*/ +/*static char *sccsid = "from: @(#)xdr.c 2.1 88/07/29 4.0 RPCSRC";*/ +static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr.c,v 1.9 1999/08/28 00:02:55 peter Exp $"; +#endif + +/* + * xdr.c, Generic XDR routines implementation. + * + * Copyright (C) 1986, Sun Microsystems, Inc. + * + * These are the "generic" xdr routines used to serialize and de-serialize + * most common data items. See xdr.h for more info on the interface to + * xdr. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <rpc/types.h> +#include <rpc/xdr.h> + +#if defined(__rtems__) +#define warnx(msg) fprintf(stderr, msg "\n"); +#endif + +/* + * constants specific to the xdr "protocol" + */ +#define XDR_FALSE ((long) 0) +#define XDR_TRUE ((long) 1) +#define LASTUNSIGNED ((u_int) 0-1) + +/* + * for unit alignment + */ +static const char xdr_zero[BYTES_PER_XDR_UNIT] = { 0, 0, 0, 0 }; + +/* + * Free a data structure using XDR + * Not a filter, but a convenient utility nonetheless + */ +void +xdr_free( + xdrproc_t proc, + char *objp) +{ + XDR x; + + x.x_op = XDR_FREE; + (*proc)(&x, objp); +} + +/* + * XDR nothing + */ +bool_t +xdr_void(void) +{ + + return (TRUE); +} + + +/* + * XDR integers + */ +bool_t +xdr_int( + XDR *xdrs, + int *ip) +{ + long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (long) *ip; + return (XDR_PUTLONG(xdrs, &l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, &l)) { + return (FALSE); + } + *ip = (int) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * XDR unsigned integers + */ +bool_t +xdr_u_int( + XDR *xdrs, + u_int *up) +{ + u_long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (u_long) *up; + return (XDR_PUTLONG(xdrs, (long *)&l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, (long *)&l)) { + return (FALSE); + } + *up = (u_int) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + + +/* + * XDR long integers + * same as xdr_u_long - open coded to save a proc call! + */ +bool_t +xdr_long( + XDR *xdrs, + long *lp) +{ + switch (xdrs->x_op) { + case XDR_ENCODE: + return (XDR_PUTLONG(xdrs, lp)); + case XDR_DECODE: + return (XDR_GETLONG(xdrs, lp)); + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * XDR unsigned long integers + * same as xdr_long - open coded to save a proc call! + */ +bool_t +xdr_u_long( + XDR *xdrs, + u_long *ulp) +{ + switch (xdrs->x_op) { + case XDR_ENCODE: + return (XDR_PUTLONG(xdrs, (long *)ulp)); + case XDR_DECODE: + return (XDR_GETLONG(xdrs, (long *)ulp)); + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + + +/* + * XDR 32-bit integers + * same as xdr_u_int32_t - open coded to save a proc call! + */ +bool_t +xdr_int32_t( + XDR *xdrs, + int32_t *int32_p) +{ + long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (long) *int32_p; + return (XDR_PUTLONG(xdrs, &l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, &l)) { + return (FALSE); + } + *int32_p = (int32_t) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * XDR unsigned 32-bit integers + * same as xdr_int32_t - open coded to save a proc call! + */ +bool_t +xdr_u_int32_t( + XDR *xdrs, + u_int32_t *u_int32_p) +{ + u_long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (u_long) *u_int32_p; + return (XDR_PUTLONG(xdrs, (long *)&l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, (long *)&l)) { + return (FALSE); + } + *u_int32_p = (u_int32_t) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + return (FALSE); +} + +/* + * XDR short integers + */ +bool_t +xdr_short( + XDR *xdrs, + short *sp) +{ + long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (long) *sp; + return (XDR_PUTLONG(xdrs, &l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, &l)) { + return (FALSE); + } + *sp = (short) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * XDR unsigned short integers + */ +bool_t +xdr_u_short( + XDR *xdrs, + u_short *usp) +{ + u_long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (u_long) *usp; + return (XDR_PUTLONG(xdrs, (long *)&l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, (long *)&l)) { + return (FALSE); + } + *usp = (u_short) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + + +/* + * XDR 16-bit integers + */ +bool_t +xdr_int16_t( + XDR *xdrs, + int16_t *int16_p) +{ + long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (long) *int16_p; + return (XDR_PUTLONG(xdrs, &l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, &l)) { + return (FALSE); + } + *int16_p = (int16_t) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * XDR unsigned 16-bit integers + */ +bool_t +xdr_u_int16_t( + XDR *xdrs, + u_int16_t *u_int16_p) +{ + u_long l; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + l = (u_long) *u_int16_p; + return (XDR_PUTLONG(xdrs, (long *)&l)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, (long *)&l)) { + return (FALSE); + } + *u_int16_p = (u_int16_t) l; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + + +/* + * XDR a char + */ +bool_t +xdr_char( + XDR *xdrs, + char *cp) +{ + int i; + + i = (*cp); + if (!xdr_int(xdrs, &i)) { + return (FALSE); + } + *cp = i; + return (TRUE); +} + +/* + * XDR an unsigned char + */ +bool_t +xdr_u_char( + XDR *xdrs, + u_char *cp) +{ + u_int u; + + u = (*cp); + if (!xdr_u_int(xdrs, &u)) { + return (FALSE); + } + *cp = u; + return (TRUE); +} + +/* + * XDR booleans + */ +bool_t +xdr_bool( + XDR *xdrs, + bool_t *bp) +{ + long lb; + + switch (xdrs->x_op) { + + case XDR_ENCODE: + lb = *bp ? XDR_TRUE : XDR_FALSE; + return (XDR_PUTLONG(xdrs, &lb)); + + case XDR_DECODE: + if (!XDR_GETLONG(xdrs, &lb)) { + return (FALSE); + } + *bp = (lb == XDR_FALSE) ? FALSE : TRUE; + return (TRUE); + + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * XDR enumerations + */ +bool_t +xdr_enum( + XDR *xdrs, + enum_t *ep) +{ +#ifndef lint + enum sizecheck { SIZEVAL }; /* used to find the size of an enum */ + + /* + * enums are treated as ints + */ + if (sizeof (enum sizecheck) == sizeof (long)) { + return (xdr_long(xdrs, (long *)ep)); + } else if (sizeof (enum sizecheck) == sizeof (int)) { + return (xdr_int(xdrs, (int *)ep)); + } else if (sizeof (enum sizecheck) == sizeof (short)) { + return (xdr_short(xdrs, (short *)ep)); + } else { + return (FALSE); + } +#else + (void) (xdr_short(xdrs, (short *)ep)); + (void) (xdr_int(xdrs, (int *)ep)); + return (xdr_long(xdrs, (long *)ep)); +#endif +} + +/* + * XDR opaque data + * Allows the specification of a fixed size sequence of opaque bytes. + * cp points to the opaque object and cnt gives the byte length. + */ +bool_t +xdr_opaque( + XDR *xdrs, + caddr_t cp, + u_int cnt) +{ + u_int rndup; + static int crud[BYTES_PER_XDR_UNIT]; + + /* + * if no data we are done + */ + if (cnt == 0) + return (TRUE); + + /* + * round byte count to full xdr units + */ + rndup = cnt % BYTES_PER_XDR_UNIT; + if (rndup > 0) + rndup = BYTES_PER_XDR_UNIT - rndup; + + if (xdrs->x_op == XDR_DECODE) { + if (!XDR_GETBYTES(xdrs, cp, cnt)) { + return (FALSE); + } + if (rndup == 0) + return (TRUE); + return (XDR_GETBYTES(xdrs, (caddr_t)crud, rndup)); + } + + if (xdrs->x_op == XDR_ENCODE) { + if (!XDR_PUTBYTES(xdrs, cp, cnt)) { + return (FALSE); + } + if (rndup == 0) + return (TRUE); + return (XDR_PUTBYTES(xdrs, xdr_zero, rndup)); + } + + if (xdrs->x_op == XDR_FREE) { + return (TRUE); + } + + return (FALSE); +} + +/* + * XDR counted bytes + * *cpp is a pointer to the bytes, *sizep is the count. + * If *cpp is NULL maxsize bytes are allocated + */ +bool_t +xdr_bytes( + XDR *xdrs, + char **cpp, + u_int *sizep, + u_int maxsize) +{ + char *sp = *cpp; /* sp is the actual string pointer */ + u_int nodesize; + + /* + * first deal with the length since xdr bytes are counted + */ + if (! xdr_u_int(xdrs, sizep)) { + return (FALSE); + } + nodesize = *sizep; + if ((nodesize > maxsize) && (xdrs->x_op != XDR_FREE)) { + return (FALSE); + } + + /* + * now deal with the actual bytes + */ + switch (xdrs->x_op) { + + case XDR_DECODE: + if (nodesize == 0) { + return (TRUE); + } + if (sp == NULL) { + *cpp = sp = mem_alloc(nodesize); + } + if (sp == NULL) { + warnx("xdr_bytes: out of memory"); + return (FALSE); + } + /* FALLTHROUGH */ + + case XDR_ENCODE: + return (xdr_opaque(xdrs, sp, nodesize)); + + case XDR_FREE: + if (sp != NULL) { + mem_free(sp, nodesize); + *cpp = NULL; + } + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * Implemented here due to commonality of the object. + */ +bool_t +xdr_netobj( + XDR *xdrs, + struct netobj *np) +{ + + return (xdr_bytes(xdrs, &np->n_bytes, &np->n_len, MAX_NETOBJ_SZ)); +} + +/* + * XDR a descriminated union + * Support routine for discriminated unions. + * You create an array of xdrdiscrim structures, terminated with + * an entry with a null procedure pointer. The routine gets + * the discriminant value and then searches the array of xdrdiscrims + * looking for that value. It calls the procedure given in the xdrdiscrim + * to handle the discriminant. If there is no specific routine a default + * routine may be called. + * If there is no specific or default routine an error is returned. + */ +bool_t +xdr_union( + XDR *xdrs, + enum_t *dscmp, /* enum to decide which arm to work on */ + char *unp, /* the union itself */ + const struct xdr_discrim *choices, /* [value, xdr proc] for each arm */ + xdrproc_t dfault) /* default xdr routine */ +{ + enum_t dscm; + + /* + * we deal with the discriminator; it's an enum + */ + if (! xdr_enum(xdrs, dscmp)) { + return (FALSE); + } + dscm = *dscmp; + + /* + * search choices for a value that matches the discriminator. + * if we find one, execute the xdr routine for that value. + */ + for (; choices->proc != NULL_xdrproc_t; choices++) { + if (choices->value == dscm) + return ((*(choices->proc))(xdrs, unp, LASTUNSIGNED)); + } + + /* + * no match - execute the default xdr routine if there is one + */ + return ((dfault == NULL_xdrproc_t) ? FALSE : + (*dfault)(xdrs, unp, LASTUNSIGNED)); +} + + +/* + * Non-portable xdr primitives. + * Care should be taken when moving these routines to new architectures. + */ + + +/* + * XDR null terminated ASCII strings + * xdr_string deals with "C strings" - arrays of bytes that are + * terminated by a NULL character. The parameter cpp references a + * pointer to storage; If the pointer is null, then the necessary + * storage is allocated. The last parameter is the max allowed length + * of the string as specified by a protocol. + */ +bool_t +xdr_string( + XDR *xdrs, + char **cpp, + u_int maxsize) +{ + char *sp = *cpp; /* sp is the actual string pointer */ + u_int size = 0; + u_int nodesize; + + /* + * first deal with the length since xdr strings are counted-strings + */ + switch (xdrs->x_op) { + case XDR_FREE: + if (sp == NULL) { + return(TRUE); /* already free */ + } + /* FALLTHROUGH */ + case XDR_ENCODE: + size = strlen(sp); + break; + case XDR_DECODE: + break; + } + if (! xdr_u_int(xdrs, &size)) { + return (FALSE); + } + if (size > maxsize) { + return (FALSE); + } + nodesize = size + 1; + + /* + * now deal with the actual bytes + */ + switch (xdrs->x_op) { + + case XDR_DECODE: + if (nodesize == 0) { + return (TRUE); + } + if (sp == NULL) + *cpp = sp = mem_alloc(nodesize); + if (sp == NULL) { + warnx("xdr_string: out of memory"); + return (FALSE); + } + sp[size] = 0; + /* FALLTHROUGH */ + + case XDR_ENCODE: + return (xdr_opaque(xdrs, sp, size)); + + case XDR_FREE: + mem_free(sp, nodesize); + *cpp = NULL; + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* + * Wrapper for xdr_string that can be called directly from + * routines like clnt_call + */ +bool_t +xdr_wrapstring( + XDR *xdrs, + char **cpp) +{ + return xdr_string(xdrs, cpp, LASTUNSIGNED); +} + +/* + * XDR 64-bit integers + */ +bool_t +xdr_int64_t( + XDR *xdrs, + int64_t *int64_p) +{ + int64_t x; + + switch (xdrs->x_op) { + case XDR_ENCODE: + return (xdr_opaque(xdrs, (caddr_t)int64_p, sizeof(int64_t))); + case XDR_DECODE: + if (!xdr_opaque(xdrs, (caddr_t)&x, sizeof x)) { + return (FALSE); + } + *int64_p = x; + return (TRUE); + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + + +/* + * XDR unsigned 64-bit integers + */ +bool_t +xdr_u_int64_t( + XDR *xdrs, + u_int64_t *uint64_p) +{ + u_int64_t x; + + switch (xdrs->x_op) { + case XDR_ENCODE: + return (xdr_opaque(xdrs, (caddr_t)uint64_p, sizeof(u_int64_t))); + case XDR_DECODE: + if (!xdr_opaque(xdrs, (caddr_t)&x, sizeof x)) { + return (FALSE); + } + *uint64_p = x; + return (TRUE); + case XDR_FREE: + return (TRUE); + } + /* NOTREACHED */ + return (FALSE); +} + +/* FIXME: RTEMS does not support u_longlong_t and longlong_t, yet */ +#if !defined(__rtems__) +/* + * XDR hypers + */ +bool_t +xdr_hyper(xdrs, llp) + XDR *xdrs; + longlong_t *llp; +{ + + /* + * Don't bother open-coding this; it's a fair amount of code. Just + * call xdr_int64_t(). + */ + return (xdr_int64_t(xdrs, (int64_t *)llp)); +} + + +/* + * XDR unsigned hypers + */ +bool_t +xdr_u_hyper(xdrs, ullp) + XDR *xdrs; + u_longlong_t *ullp; +{ + + /* + * Don't bother open-coding this; it's a fair amount of code. Just + * call xdr_u_int64_t(). + */ + return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp)); +} + + +/* + * XDR longlong_t's + */ +bool_t +xdr_longlong_t(xdrs, llp) + XDR *xdrs; + longlong_t *llp; +{ + + /* + * Don't bother open-coding this; it's a fair amount of code. Just + * call xdr_int64_t(). + */ + return (xdr_int64_t(xdrs, (int64_t *)llp)); +} + + +/* + * XDR u_longlong_t's + */ +bool_t +xdr_u_longlong_t(xdrs, ullp) + XDR *xdrs; + u_longlong_t *ullp; +{ + + /* + * Don't bother open-coding this; it's a fair amount of code. Just + * call xdr_u_int64_t(). + */ + return (xdr_u_int64_t(xdrs, (u_int64_t *)ullp)); +} +#endif |