mirror of
https://github.com/openvswitch/ovs
synced 2025-10-15 14:17:18 +00:00
b3907fbc6c
ovs_queue doesn't seem very useful; it's just a singly-linked list. It's more generally useful to use a general-purpose "struct list" for lists of packets, so this commit adds such a member to "struct ofpbuf" and shifts the existing users to use it.
95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
/*
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* Copyright (c) 2008, 2009, 2010 Nicira Networks.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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#include "list.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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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 list list_node; /* Private list element for use by owner. */
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void *private_p; /* 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_new_with_headroom(size_t, size_t headroom);
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struct ofpbuf *ofpbuf_clone(const struct ofpbuf *);
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struct ofpbuf *ofpbuf_clone_with_headroom(const struct ofpbuf *,
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size_t headroom);
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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_zeros(struct ofpbuf *, size_t);
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void *ofpbuf_push(struct ofpbuf *b, const void *, size_t);
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size_t ofpbuf_headroom(const struct ofpbuf *);
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size_t ofpbuf_tailroom(const 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_trim(struct ofpbuf *);
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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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char *ofpbuf_to_string(const struct ofpbuf *, size_t maxbytes);
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static inline struct ofpbuf *ofpbuf_from_list(const struct list *list)
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{
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return CONTAINER_OF(list, struct ofpbuf, list_node);
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}
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void ofpbuf_list_delete(struct list *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ofpbuf.h */
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