Ben Pfaff
67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
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* Junior University
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*
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* We are making the OpenFlow specification and associated documentation
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* (Software) available for public use and benefit with the expectation
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* that others will use, modify and enhance the Software and contribute
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* those enhancements back to the community. However, since we would
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* like to make the Software available for broadest use, with as few
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* restrictions as possible permission is hereby granted, free of
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* charge, to any person obtaining a copy of this Software to deal in
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* the Software under the copyrights without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* The name and trademarks of copyright holder(s) may NOT be used in
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* advertising or publicity pertaining to the Software or any
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* derivatives without specific, written prior permission.
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*/
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#ifndef FLOW_H
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#define FLOW_H 1
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#include <stdbool.h>
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#include <stdint.h>
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#include "util.h"
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struct ofpbuf;
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/* Identification data for a flow.
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All fields are in network byte order.
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In decreasing order by size, so that flow structures can be hashed or
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compared bytewise. */
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struct flow {
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uint32_t nw_src; /* IP source address. */
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uint32_t nw_dst; /* IP destination address. */
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uint16_t in_port; /* Input switch port. */
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uint16_t dl_vlan; /* Input VLAN. */
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uint16_t dl_type; /* Ethernet frame type. */
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uint16_t tp_src; /* TCP/UDP source port. */
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uint16_t tp_dst; /* TCP/UDP destination port. */
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uint8_t dl_src[6]; /* Ethernet source address. */
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uint8_t dl_dst[6]; /* Ethernet destination address. */
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uint8_t nw_proto; /* IP protocol. */
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uint8_t reserved; /* Pad to 32-bit alignment. */
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};
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BUILD_ASSERT_DECL(sizeof (struct flow) == 32);
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int flow_extract(struct ofpbuf *, uint16_t in_port, struct flow *);
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void flow_print(FILE *, const struct flow *);
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int flow_compare(const struct flow *, const struct flow *);
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unsigned long int flow_hash(const struct flow *, uint32_t basis);
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#endif /* flow.h */
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