From 064af42167bf4fc9aaea2702d80ce08074b889c0 Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Wed, 8 Jul 2009 13:19:16 -0700 Subject: Import from old repository commit 61ef2b42a9c4ba8e1600f15bb0236765edc2ad45. --- lib/ofpbuf.h | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 lib/ofpbuf.h (limited to 'lib/ofpbuf.h') diff --git a/lib/ofpbuf.h b/lib/ofpbuf.h new file mode 100644 index 00000000..a68c2800 --- /dev/null +++ b/lib/ofpbuf.h @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2008, 2009 Nicira Networks. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef OFPBUF_H +#define OFPBUF_H 1 + +#include + +/* Buffer for holding arbitrary data. An ofpbuf is automatically reallocated + * as necessary if it grows too large for the available memory. */ +struct ofpbuf { + void *base; /* First byte of area malloc()'d area. */ + size_t allocated; /* Number of bytes allocated. */ + + void *data; /* First byte actually in use. */ + size_t size; /* Number of bytes in use. */ + + void *l2; /* Link-level header. */ + void *l3; /* Network-level header. */ + void *l4; /* Transport-level header. */ + void *l7; /* Application data. */ + + struct ofpbuf *next; /* Next in a list of ofpbufs. */ + void *private; /* Private pointer for use by owner. */ +}; + +void ofpbuf_use(struct ofpbuf *, void *, size_t); + +void ofpbuf_init(struct ofpbuf *, size_t); +void ofpbuf_uninit(struct ofpbuf *); +void ofpbuf_reinit(struct ofpbuf *, size_t); + +struct ofpbuf *ofpbuf_new(size_t); +struct ofpbuf *ofpbuf_clone(const struct ofpbuf *); +struct ofpbuf *ofpbuf_clone_data(const void *, size_t); +void ofpbuf_delete(struct ofpbuf *); + +void *ofpbuf_at(const struct ofpbuf *, size_t offset, size_t size); +void *ofpbuf_at_assert(const struct ofpbuf *, size_t offset, size_t size); +void *ofpbuf_tail(const struct ofpbuf *); +void *ofpbuf_end(const struct ofpbuf *); + +void *ofpbuf_put_uninit(struct ofpbuf *, size_t); +void *ofpbuf_put_zeros(struct ofpbuf *, size_t); +void *ofpbuf_put(struct ofpbuf *, const void *, size_t); +void ofpbuf_reserve(struct ofpbuf *, size_t); +void *ofpbuf_push_uninit(struct ofpbuf *b, size_t); +void *ofpbuf_push(struct ofpbuf *b, const void *, size_t); + +size_t ofpbuf_headroom(struct ofpbuf *); +size_t ofpbuf_tailroom(struct ofpbuf *); +void ofpbuf_prealloc_headroom(struct ofpbuf *, size_t); +void ofpbuf_prealloc_tailroom(struct ofpbuf *, size_t); +void ofpbuf_trim(struct ofpbuf *); + +void ofpbuf_clear(struct ofpbuf *); +void *ofpbuf_pull(struct ofpbuf *, size_t); +void *ofpbuf_try_pull(struct ofpbuf *, size_t); + +#endif /* ofpbuf.h */ -- cgit v1.2.3