Mikio Hara
90 lines
3.7 KiB
C
90 lines
3.7 KiB
C
/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
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* Junior University
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*
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* We are making the OpenFlow specification and associated documentation
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* (Software) available for public use and benefit with the expectation
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* that others will use, modify and enhance the Software and contribute
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* those enhancements back to the community. However, since we would
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* like to make the Software available for broadest use, with as few
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* restrictions as possible permission is hereby granted, free of
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* charge, to any person obtaining a copy of this Software to deal in
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* the Software under the copyrights without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* The name and trademarks of copyright holder(s) may NOT be used in
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* advertising or publicity pertaining to the Software or any
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* derivatives without specific, written prior permission.
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*/
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#ifndef OFPBUF_H
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#define OFPBUF_H 1
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#include <stddef.h>
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/* Buffer for holding arbitrary data. An ofpbuf is automatically reallocated
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* as necessary if it grows too large for the available memory. */
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struct ofpbuf {
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void *base; /* First byte of area malloc()'d area. */
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size_t allocated; /* Number of bytes allocated. */
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void *data; /* First byte actually in use. */
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size_t size; /* Number of bytes in use. */
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void *l2; /* Link-level header. */
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void *l3; /* Network-level header. */
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void *l4; /* Transport-level header. */
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void *l7; /* Application data. */
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struct ofpbuf *next; /* Next in a list of ofpbufs. */
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void *private; /* Private pointer for use by owner. */
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};
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void ofpbuf_use(struct ofpbuf *, void *, size_t);
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void ofpbuf_init(struct ofpbuf *, size_t);
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void ofpbuf_uninit(struct ofpbuf *);
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void ofpbuf_reinit(struct ofpbuf *, size_t);
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struct ofpbuf *ofpbuf_new(size_t);
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struct ofpbuf *ofpbuf_clone(const struct ofpbuf *);
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struct ofpbuf *ofpbuf_clone_data(const void *, size_t);
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void ofpbuf_delete(struct ofpbuf *);
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void *ofpbuf_at(const struct ofpbuf *, size_t offset, size_t size);
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void *ofpbuf_at_assert(const struct ofpbuf *, size_t offset, size_t size);
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void *ofpbuf_tail(const struct ofpbuf *);
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void *ofpbuf_end(const struct ofpbuf *);
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void *ofpbuf_put_uninit(struct ofpbuf *, size_t);
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void *ofpbuf_put_zeros(struct ofpbuf *, size_t);
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void *ofpbuf_put(struct ofpbuf *, const void *, size_t);
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void ofpbuf_reserve(struct ofpbuf *, size_t);
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void *ofpbuf_push_uninit(struct ofpbuf *b, size_t);
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void *ofpbuf_push(struct ofpbuf *b, const void *, size_t);
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size_t ofpbuf_headroom(struct ofpbuf *);
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size_t ofpbuf_tailroom(struct ofpbuf *);
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void ofpbuf_prealloc_headroom(struct ofpbuf *, size_t);
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void ofpbuf_prealloc_tailroom(struct ofpbuf *, size_t);
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void ofpbuf_clear(struct ofpbuf *);
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void *ofpbuf_pull(struct ofpbuf *, size_t);
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void *ofpbuf_try_pull(struct ofpbuf *, size_t);
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#endif /* ofpbuf.h */
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