Add ability to monitor both ends of secchan connections from dpctl.

[sliver-openvswitch.git] / include / buffer.h

diff --git a/include/buffer.h b/include/buffer.h
index 9875024..0868069 100644 (file)
--- a/include/buffer.h
+++ b/include/buffer.h
@@ -1,22 +1,34 @@
-/* Copyright (C) 2007 Board of Trustees, Leland Stanford Jr. University.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ * 
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ * 
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
  */
 
 #ifndef BUFFER_H
@@ -33,7 +45,13 @@ struct buffer {
     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 buffer *next;        /* Next in a list of buffers. */
+    void *private;              /* Private pointer for use by owner. */
 };
 
 void buffer_use(struct buffer *, void *, size_t);
@@ -43,6 +61,7 @@ void buffer_uninit(struct buffer *);
 void buffer_reinit(struct buffer *, size_t);
 
 struct buffer *buffer_new(size_t);
+struct buffer *buffer_clone(const struct buffer *);
 void buffer_delete(struct buffer *);
 
 void *buffer_at(const struct buffer *, size_t offset, size_t size);
@@ -51,13 +70,18 @@ void *buffer_tail(const struct buffer *);
 void *buffer_end(const struct buffer *);
 
 void *buffer_put_uninit(struct buffer *, size_t);
-void buffer_put(struct buffer *, const void *, size_t);
+void *buffer_put(struct buffer *, const void *, size_t);
+void buffer_reserve(struct buffer *, size_t);
+void *buffer_push_uninit(struct buffer *b, size_t);
+void *buffer_push(struct buffer *b, const void *, size_t);
 
 size_t buffer_headroom(struct buffer *);
 size_t buffer_tailroom(struct buffer *);
-void buffer_reserve_tailroom(struct buffer *, size_t);
+void buffer_prealloc_headroom(struct buffer *, size_t);
+void buffer_prealloc_tailroom(struct buffer *, size_t);
 
 void buffer_clear(struct buffer *);
-void buffer_pull(struct buffer *, size_t);
+void *buffer_pull(struct buffer *, size_t);
+void *buffer_try_pull(struct buffer *, size_t);
 
 #endif /* buffer.h */