/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
* @(#)xdr_subs.h 8.3 (Berkeley) 3/30/95
* FreeBSD-Id: xdr_subs.h,v 1.9 1997/02/22 09:42:53 peter Exp $
*/
-
-
#ifndef _NFS_XDR_SUBS_H_
#define _NFS_XDR_SUBS_H_
* but we cannot count on their alignment anyway.
*/
-#define fxdr_unsigned(t, v) ((t)ntohl((long)(v)))
-#define txdr_unsigned(v) (htonl((long)(v)))
+#define fxdr_unsigned(t, v) ((t)ntohl((uint32_t)(v)))
+#define txdr_unsigned(v) (htonl((uint32_t)(v)))
+
+#define fxdr_hyper(f, t) { \
+ ((uint32_t *)(t))[_QUAD_HIGHWORD] = ntohl(((uint32_t *)(f))[0]); \
+ ((uint32_t *)(t))[_QUAD_LOWWORD] = ntohl(((uint32_t *)(f))[1]); \
+}
+#define txdr_hyper(f, t) { \
+ ((uint32_t *)(t))[0] = htonl(((uint32_t *)(f))[_QUAD_HIGHWORD]); \
+ ((uint32_t *)(t))[1] = htonl(((uint32_t *)(f))[_QUAD_LOWWORD]); \
+}
+
+
+/*
+ * xdrbuf
+ *
+ * generalized functionality for managing the building/dissecting of XDR data
+ */
+typedef enum xdrbuf_type {
+ XDRBUF_NONE = 0,
+ XDRBUF_BUFFER = 1,
+} xdrbuf_type;
+
+struct xdrbuf {
+ union {
+ struct {
+ char * xbb_base; /* base address of buffer */
+ uint32_t xbb_size; /* size of buffer */
+ uint32_t xbb_len; /* length of data in buffer */
+ } xb_buffer;
+ } xb_u;
+ char * xb_ptr; /* pointer to current position */
+ size_t xb_left; /* bytes remaining in current buffer */
+ size_t xb_growsize; /* bytes to allocate when growing */
+ xdrbuf_type xb_type; /* type of xdr buffer */
+ uint32_t xb_flags; /* XB_* (see below) */
+};
+
+#define XB_CLEANUP 0x0001 /* needs cleanup */
+
+#define XDRWORD 4 /* the basic XDR building block is a 4 byte (32 bit) word */
+#define xdr_rndup(a) (((a)+3)&(~0x3)) /* round up to XDRWORD size */
+#define xdr_pad(a) (xdr_rndup(a) - (a)) /* calculate round up padding */
+
+void xb_init(struct xdrbuf *, xdrbuf_type);
+void xb_init_buffer(struct xdrbuf *, char *, size_t);
+void xb_cleanup(struct xdrbuf *);
+void *xb_malloc(size_t);
+void xb_free(void *);
+int xb_grow(struct xdrbuf *);
+void xb_set_cur_buf_len(struct xdrbuf *);
+char *xb_buffer_base(struct xdrbuf *);
+int xb_advance(struct xdrbuf *, uint32_t);
+int xb_offset(struct xdrbuf *);
+int xb_seek(struct xdrbuf *, uint32_t);
+int xb_add_bytes(struct xdrbuf *, const char *, uint32_t, int);
+int xb_get_bytes(struct xdrbuf *, char *, uint32_t, int);
+
+#ifdef _NFS_XDR_SUBS_FUNCS_
+
+/*
+ * basic initialization of xdrbuf structure
+ */
+void
+xb_init(struct xdrbuf *xbp, xdrbuf_type type)
+{
+ bzero(xbp, sizeof(*xbp));
+ xbp->xb_type = type;
+ xbp->xb_flags |= XB_CLEANUP;
+}
+
+/*
+ * initialize a single-buffer xdrbuf
+ */
+void
+xb_init_buffer(struct xdrbuf *xbp, char *buf, size_t buflen)
+{
+ xb_init(xbp, XDRBUF_BUFFER);
+ xbp->xb_u.xb_buffer.xbb_base = buf;
+ xbp->xb_u.xb_buffer.xbb_size = buflen;
+ xbp->xb_u.xb_buffer.xbb_len = buflen;
+ xbp->xb_growsize = 512;
+ xbp->xb_ptr = buf;
+ xbp->xb_left = buflen;
+ if (buf) { /* when using an existing buffer, xb code should skip cleanup */
+ xbp->xb_flags &= ~XB_CLEANUP;
+ }
+}
+
+/*
+ * get the pointer to the single-buffer xdrbuf's buffer
+ */
+char *
+xb_buffer_base(struct xdrbuf *xbp)
+{
+ return xbp->xb_u.xb_buffer.xbb_base;
+}
+
+/*
+ * clean up any resources held by an xdrbuf
+ */
+void
+xb_cleanup(struct xdrbuf *xbp)
+{
+ if (!(xbp->xb_flags & XB_CLEANUP)) {
+ return;
+ }
+ switch (xbp->xb_type) {
+ case XDRBUF_BUFFER:
+ if (xbp->xb_u.xb_buffer.xbb_base) {
+ xb_free(xbp->xb_u.xb_buffer.xbb_base);
+ }
+ break;
+ default:
+ break;
+ }
+ xbp->xb_flags &= ~XB_CLEANUP;
+}
+
+/*
+ * set the length of valid data in the current buffer to
+ * be up to the current location within the buffer
+ */
+void
+xb_set_cur_buf_len(struct xdrbuf *xbp)
+{
+ switch (xbp->xb_type) {
+ case XDRBUF_BUFFER:
+ xbp->xb_u.xb_buffer.xbb_len = xbp->xb_ptr - xbp->xb_u.xb_buffer.xbb_base;
+ break;
+ default:
+ break;
+ }
+}
+
+/*
+ * advance forward through existing data in xdrbuf
+ */
+int
+xb_advance(struct xdrbuf *xbp, uint32_t len)
+{
+ uint32_t tlen;
+
+ while (len) {
+ if (xbp->xb_left <= 0) {
+ return EBADRPC;
+ }
+ tlen = MIN(xbp->xb_left, len);
+ if (tlen) {
+ xbp->xb_ptr += tlen;
+ xbp->xb_left -= tlen;
+ len -= tlen;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Calculate the current offset in the XDR buffer.
+ */
+int
+xb_offset(struct xdrbuf *xbp)
+{
+ uint32_t offset = 0;
+
+ switch (xbp->xb_type) {
+ case XDRBUF_BUFFER:
+ offset = xbp->xb_ptr - xbp->xb_u.xb_buffer.xbb_base;
+ break;
+ default:
+ break;
+ }
-#define fxdr_nfsv2time(f, t) { \
- (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); \
- if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) \
- (t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
- else \
- (t)->tv_nsec = 0; \
+ return offset;
}
-#define txdr_nfsv2time(f, t) { \
- ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); \
- if ((f)->tv_nsec != -1) \
- ((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
- else \
- ((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; \
+
+/*
+ * Seek to the given offset in the existing data in the XDR buffer.
+ */
+int
+xb_seek(struct xdrbuf *xbp, uint32_t offset)
+{
+ switch (xbp->xb_type) {
+ case XDRBUF_BUFFER:
+ xbp->xb_ptr = xbp->xb_u.xb_buffer.xbb_base + offset;
+ xbp->xb_left = xbp->xb_u.xb_buffer.xbb_len - offset;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
}
-#define fxdr_nfsv3time(f, t) { \
- (t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); \
- (t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); \
+/*
+ * allocate memory
+ */
+void *
+xb_malloc(size_t size)
+{
+ void *buf = NULL;
+
+#ifdef KERNEL
+ MALLOC(buf, void *, size, M_TEMP, M_WAITOK);
+#else
+ buf = malloc(size);
+#endif
+ return buf;
}
-#define txdr_nfsv3time(f, t) { \
- ((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); \
- ((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); \
+/*
+ * free a chunk of memory allocated with xb_malloc()
+ */
+void
+xb_free(void *buf)
+{
+#ifdef KERNEL
+ FREE(buf, M_TEMP);
+#else
+ free(buf);
+#endif
}
-#define fxdr_hyper(f, t) { \
- ((long *)(t))[_QUAD_HIGHWORD] = ntohl(((long *)(f))[0]); \
- ((long *)(t))[_QUAD_LOWWORD] = ntohl(((long *)(f))[1]); \
+/*
+ * Increase space available for new data in XDR buffer.
+ */
+int
+xb_grow(struct xdrbuf *xbp)
+{
+ char *newbuf, *oldbuf;
+ size_t newsize, oldsize;
+
+ switch (xbp->xb_type) {
+ case XDRBUF_BUFFER:
+ oldsize = xbp->xb_u.xb_buffer.xbb_size;
+ oldbuf = xbp->xb_u.xb_buffer.xbb_base;
+ newsize = oldsize + xbp->xb_growsize;
+ if (newsize < oldsize) {
+ return ENOMEM;
+ }
+ newbuf = xb_malloc(newsize);
+ if (newbuf == NULL) {
+ return ENOMEM;
+ }
+ if (oldbuf != NULL) {
+ bcopy(oldbuf, newbuf, oldsize);
+ xb_free(oldbuf);
+ }
+ xbp->xb_u.xb_buffer.xbb_base = newbuf;
+ xbp->xb_u.xb_buffer.xbb_size = newsize;
+ xbp->xb_ptr = newbuf + oldsize;
+ xbp->xb_left = xbp->xb_growsize;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
}
-#define txdr_hyper(f, t) { \
- ((long *)(t))[0] = htonl(((long *)(f))[_QUAD_HIGHWORD]); \
- ((long *)(t))[1] = htonl(((long *)(f))[_QUAD_LOWWORD]); \
+
+/*
+ * xb_add_bytes()
+ *
+ * Add "count" bytes of opaque data pointed to by "buf" to the given XDR buffer.
+ */
+int
+xb_add_bytes(struct xdrbuf *xbp, const char *buf, uint32_t count, int nopad)
+{
+ uint32_t len, tlen;
+ int error;
+
+ len = nopad ? count : xdr_rndup(count);
+
+ /* copy in "count" bytes and zero out any pad bytes */
+ while (len) {
+ if (xbp->xb_left <= 0) {
+ /* need more space */
+ if ((error = xb_grow(xbp))) {
+ return error;
+ }
+ if (xbp->xb_left <= 0) {
+ return ENOMEM;
+ }
+ }
+ tlen = MIN(xbp->xb_left, len);
+ if (tlen) {
+ if (count) {
+ if (tlen > count) {
+ tlen = count;
+ }
+ bcopy(buf, xbp->xb_ptr, tlen);
+ } else {
+ bzero(xbp->xb_ptr, tlen);
+ }
+ xbp->xb_ptr += tlen;
+ xbp->xb_left -= tlen;
+ len -= tlen;
+ if (count) {
+ buf += tlen;
+ count -= tlen;
+ }
+ }
+ }
+ return 0;
+}
+
+/*
+ * xb_get_bytes()
+ *
+ * Get "count" bytes of opaque data from the given XDR buffer.
+ */
+int
+xb_get_bytes(struct xdrbuf *xbp, char *buf, uint32_t count, int nopad)
+{
+ uint32_t len, tlen;
+
+ len = nopad ? count : xdr_rndup(count);
+
+ /* copy in "count" bytes and zero out any pad bytes */
+ while (len) {
+ if (xbp->xb_left <= 0) {
+ return ENOMEM;
+ }
+ tlen = MIN(xbp->xb_left, len);
+ if (tlen) {
+ if (count) {
+ if (tlen > count) {
+ tlen = count;
+ }
+ bcopy(xbp->xb_ptr, buf, tlen);
+ }
+ xbp->xb_ptr += tlen;
+ xbp->xb_left -= tlen;
+ len -= tlen;
+ if (count) {
+ buf += tlen;
+ count -= tlen;
+ }
+ }
+ }
+ return 0;
}
+#endif /* _NFS_XDR_SUBS_FUNCS_ */
+
+
+/*
+ * macros for building XDR data
+ */
+
+/* finalize the data that has been added to the buffer */
+#define xb_build_done(E, XB) \
+ do { \
+ if (E) break; \
+ xb_set_cur_buf_len(XB); \
+ } while (0)
+
+/* add a 32-bit value */
+#define xb_add_32(E, XB, VAL) \
+ do { \
+ uint32_t __tmp; \
+ if (E) break; \
+ __tmp = txdr_unsigned(VAL); \
+ (E) = xb_add_bytes((XB), (void*)&__tmp, XDRWORD, 0); \
+ } while (0)
+
+/* add a 64-bit value */
+#define xb_add_64(E, XB, VAL) \
+ do { \
+ uint64_t __tmp1, __tmp2; \
+ if (E) break; \
+ __tmp1 = (VAL); \
+ txdr_hyper(&__tmp1, &__tmp2); \
+ (E) = xb_add_bytes((XB), (char*)&__tmp2, 2 * XDRWORD, 0); \
+ } while (0)
+
+/* add an array of XDR words */
+#define xb_add_word_array(E, XB, A, LEN) \
+ do { \
+ uint32_t __i; \
+ xb_add_32((E), (XB), (LEN)); \
+ for (__i=0; __i < (uint32_t)(LEN); __i++) \
+ xb_add_32((E), (XB), (A)[__i]); \
+ } while (0)
+#define xb_add_bitmap(E, XB, B, LEN) xb_add_word_array((E), (XB), (B), (LEN))
+
+/* add a file handle */
+#define xb_add_fh(E, XB, FHP, FHLEN) \
+ do { \
+ xb_add_32((E), (XB), (FHLEN)); \
+ if (E) break; \
+ (E) = xb_add_bytes((XB), (char*)(FHP), (FHLEN), 0); \
+ } while (0)
+
+/* add a string */
+#define xb_add_string(E, XB, S, LEN) \
+ do { \
+ xb_add_32((E), (XB), (LEN)); \
+ if (E) break; \
+ (E) = xb_add_bytes((XB), (const char*)(S), (LEN), 0); \
+ } while (0)
+
+
+/*
+ * macros for decoding XDR data
+ */
+
+/* skip past data in the buffer */
+#define xb_skip(E, XB, LEN) \
+ do { \
+ if (E) break; \
+ (E) = xb_advance((XB), (LEN)); \
+ } while (0)
+
+/* get a 32-bit value */
+#define xb_get_32(E, XB, LVAL) \
+ do { \
+ uint32_t __tmp; \
+ if (E) break; \
+ (E) = xb_get_bytes((XB), (char*)&__tmp, XDRWORD, 0); \
+ if (E) break; \
+ (LVAL) = fxdr_unsigned(uint32_t, __tmp); \
+ } while (0)
+
+/* get a 64-bit value */
+#define xb_get_64(E, XB, LVAL) \
+ do { \
+ uint64_t __tmp; \
+ if (E) break; \
+ (E) = xb_get_bytes((XB), (char*)&__tmp, 2 * XDRWORD, 0); \
+ if (E) break; \
+ fxdr_hyper(&__tmp, &(LVAL)); \
+ } while (0)
+
+/* get an array of XDR words (of a given expected/maximum length) */
+#define xb_get_word_array(E, XB, A, LEN) \
+ do { \
+ uint32_t __len = 0, __i; \
+ xb_get_32((E), (XB), __len); \
+ if (E) break; \
+ for (__i=0; __i < MIN(__len, (uint32_t)(LEN)); __i++) \
+ xb_get_32((E), (XB), (A)[__i]); \
+ if (E) break; \
+ for (; __i < __len; __i++) \
+ xb_skip((E), (XB), XDRWORD); \
+ for (; __i < (uint32_t)(LEN); __i++) \
+ (A)[__i] = 0; \
+ (LEN) = __len; \
+ } while (0)
+#define xb_get_bitmap(E, XB, B, LEN) xb_get_word_array((E), (XB), (B), (LEN))
+
#endif /* __APPLE_API_PRIVATE */
#endif /* _NFS_XDR_SUBS_H_ */
projects / apple / xnu.git / blobdiff