1 /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
4 * We are making the OpenFlow specification and associated documentation
5 * (Software) available for public use and benefit with the expectation
6 * that others will use, modify and enhance the Software and contribute
7 * those enhancements back to the community. However, since we would
8 * like to make the Software available for broadest use, with as few
9 * restrictions as possible permission is hereby granted, free of
10 * charge, to any person obtaining a copy of this Software to deal in
11 * the Software under the copyrights without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 * The name and trademarks of copyright holder(s) may NOT be used in
30 * advertising or publicity pertaining to the Software or any
31 * derivatives without specific, written prior permission.
45 /* Buffers are identified to userspace by a 31-bit opaque ID. We divide the ID
46 * into a buffer number (low bits) and a cookie (high bits). The buffer number
47 * is an index into an array of buffers. The cookie distinguishes between
48 * different packets that have occupied a single buffer. Thus, the more
49 * buffers we have, the lower-quality the cookie... */
50 #define PKT_BUFFER_BITS 8
51 #define N_PKT_BUFFERS (1 << PKT_BUFFER_BITS)
52 #define PKT_BUFFER_MASK (N_PKT_BUFFERS - 1)
54 #define PKT_COOKIE_BITS (32 - PKT_BUFFER_BITS)
57 void fwd_port_input(struct datapath *, struct buffer *, int in_port);
58 int fwd_control_input(struct datapath *, const void *, size_t);
60 uint32_t fwd_save_buffer(struct buffer *);
64 struct buffer *execute_setter(struct buffer *, uint16_t,
65 const struct sw_flow_key *,
66 const struct ofp_action *);
68 #endif /* forward.h */