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      1 /*
      2  * Copyright (c) 2013 The TCPDUMP project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     15  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     16  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     17  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     18  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     22  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  * POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 /* OpenFlow: protocol between controller and datapath. */
     29 
     30 /* for netdissect_options */
     31 #include "netdissect.h"
     32 
     33 #define OF_FWD(n) { \
     34 	cp += (n); \
     35 	len -= (n); \
     36 }
     37 
     38 #define OF_CHK_FWD(n) { \
     39 	ND_TCHECK_LEN(cp, (n)); \
     40 	cp += (n); \
     41 	len -= (n); \
     42 }
     43 
     44 #define OF_VER_1_0 0x01U
     45 #define OF_VER_1_1 0x02U
     46 #define OF_VER_1_2 0x03U
     47 #define OF_VER_1_3 0x04U
     48 #define OF_VER_1_4 0x05U
     49 #define OF_VER_1_5 0x06U
     50 
     51 #define OF_HEADER_FIXLEN 8U
     52 
     53 #define ONF_EXP_ONF               0x4f4e4600
     54 #define ONF_EXP_BUTE              0xff000001
     55 #define ONF_EXP_NOVIFLOW          0xff000002
     56 #define ONF_EXP_L3                0xff000003
     57 #define ONF_EXP_L4L7              0xff000004
     58 #define ONF_EXP_WMOB              0xff000005
     59 #define ONF_EXP_FABS              0xff000006
     60 #define ONF_EXP_OTRANS            0xff000007
     61 #define ONF_EXP_NBLNCTU           0xff000008
     62 #define ONF_EXP_MPCE              0xff000009
     63 #define ONF_EXP_MPLSTPSPTN        0xff00000a
     64 extern const struct tok onf_exp_str[];
     65 
     66 extern const char * of_vendor_name(const uint32_t);
     67 extern void of_bitmap_print(netdissect_options *ndo,
     68 	const struct tok *, const uint32_t, const uint32_t);
     69 extern void of_data_print(netdissect_options *ndo,
     70 	const u_char *, const u_int);
     71 
     72 /*
     73  * Routines to handle various versions of OpenFlow.
     74  */
     75 
     76 struct of_msgtypeinfo {
     77 	/* Should not be NULL. */
     78 	const char *name;
     79 	/* May be NULL to mean "message body printing is not implemented". */
     80 	void (*decoder)(netdissect_options *ndo, const u_char *, const u_int);
     81 	enum {
     82 		REQ_NONE,   /* Message body length may be anything. */
     83 		REQ_FIXLEN, /* Message body length must be == req_value. */
     84 		REQ_MINLEN, /* Message body length must be >= req_value. */
     85 	} req_what;
     86 	uint16_t req_value;
     87 };
     88 
     89 extern const struct of_msgtypeinfo *of10_identify_msgtype(const uint8_t);
     90 extern const struct of_msgtypeinfo *of13_identify_msgtype(const uint8_t);
     91