1 /* Copyright (C) 2008 Board of Trustees, Leland Stanford Jr. University.
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
33 /* Buffers are identified to userspace by a 31-bit opaque ID. We divide the ID
34 * into a buffer number (low bits) and a cookie (high bits). The buffer number
35 * is an index into an array of buffers. The cookie distinguishes between
36 * different packets that have occupied a single buffer. Thus, the more
37 * buffers we have, the lower-quality the cookie... */
38 #define PKT_BUFFER_BITS 8
39 #define N_PKT_BUFFERS (1 << PKT_BUFFER_BITS)
40 #define PKT_BUFFER_MASK (N_PKT_BUFFERS - 1)
42 #define PKT_COOKIE_BITS (32 - PKT_BUFFER_BITS)
45 void fwd_port_input(struct datapath *, struct buffer *, int in_port);
46 int fwd_control_input(struct datapath *, const void *, size_t);
48 uint32_t fwd_save_buffer(struct buffer *);
52 struct buffer *execute_setter(struct buffer *, uint16_t,
53 const struct sw_flow_key *,
54 const struct ofp_action *);
56 #endif /* forward.h */