/*
* Copyright (c) 2013 The TCPDUMP project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/* OpenFlow: protocol between controller and datapath. */

/* for netdissect_options */
#include "netdissect.h"

#define OF_FWD(n) { \
       cp += (n); \
       len -= (n); \
}

#define OF_CHK_FWD(n) { \
       ND_TCHECK_LEN(cp, (n)); \
       cp += (n); \
       len -= (n); \
}

#define OF_VER_1_0 0x01U
#define OF_VER_1_1 0x02U
#define OF_VER_1_2 0x03U
#define OF_VER_1_3 0x04U
#define OF_VER_1_4 0x05U
#define OF_VER_1_5 0x06U

#define OF_HEADER_FIXLEN 8U

#define ONF_EXP_ONF               0x4f4e4600
#define ONF_EXP_BUTE              0xff000001
#define ONF_EXP_NOVIFLOW          0xff000002
#define ONF_EXP_L3                0xff000003
#define ONF_EXP_L4L7              0xff000004
#define ONF_EXP_WMOB              0xff000005
#define ONF_EXP_FABS              0xff000006
#define ONF_EXP_OTRANS            0xff000007
#define ONF_EXP_NBLNCTU           0xff000008
#define ONF_EXP_MPCE              0xff000009
#define ONF_EXP_MPLSTPSPTN        0xff00000a
extern const struct tok onf_exp_str[];

extern const char * of_vendor_name(const uint32_t);
extern void of_bitmap_print(netdissect_options *ndo,
       const struct tok *, const uint32_t, const uint32_t);
extern void of_data_print(netdissect_options *ndo,
       const u_char *, const u_int);

/*
* Routines to handle various versions of OpenFlow.
*/

struct of_msgtypeinfo {
       /* Should not be NULL. */
       const char *name;
       /* May be NULL to mean "message body printing is not implemented". */
       void (*decoder)(netdissect_options *ndo, const u_char *, const u_int);
       enum {
               REQ_NONE,   /* Message body length may be anything. */
               REQ_FIXLEN, /* Message body length must be == req_value. */
               REQ_MINLEN, /* Message body length must be >= req_value. */
       } req_what;
       uint16_t req_value;
};

extern const struct of_msgtypeinfo *of10_identify_msgtype(const uint8_t);
extern const struct of_msgtypeinfo *of13_identify_msgtype(const uint8_t);