1 files changed, 73 insertions, 0 deletions
diff --git a/lib/ofpbuf.h b/lib/ofpbuf.h
new file mode 100644
index 000000000..a68c2800a
--- /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 <stddef.h>
+
+/* 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 */