6 * lib.h - library include for command line tools
8 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
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20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * Alternatively, provided that this notice is retained in full, this
24 * software may be distributed under the terms of the GNU General
25 * Public License ("GPL") version 2, in which case the provisions of the
26 * GPL apply INSTEAD OF those given above.
28 * The provided data structures and external interfaces from this code
29 * are not restricted to be used by modules with a GPL compatible license.
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
37 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
41 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
44 * Send feedback to <linux-can@vger.kernel.org>
48 /* buffer sizes for CAN frame string representations */
50 #define CL_ID (sizeof("12345678##1"))
51 #define CL_DATA sizeof(".AA")
52 #define CL_BINDATA sizeof(".10101010")
54 /* CAN FD ASCII hex short representation with DATA_SEPERATORs */
55 #define CL_CFSZ (2*CL_ID + 64*CL_DATA)
57 /* CAN FD ASCII hex long representation with binary output */
58 #define CL_LONGCFSZ (2*CL_ID + sizeof(" [255] ") + (64*CL_BINDATA))
60 /* CAN DLC to real data length conversion helpers especially for CAN FD */
62 /* get data length from can_dlc with sanitized can_dlc */
63 unsigned char can_dlc2len(unsigned char can_dlc);
65 /* map the sanitized data length to an appropriate data length code */
66 unsigned char can_len2dlc(unsigned char len);
68 unsigned char asc2nibble(char c);
70 * Returns the decimal value of a given ASCII hex character.
72 * While 0..9, a..f, A..F are valid ASCII hex characters.
73 * On invalid characters the value 16 is returned for error handling.
76 int hexstring2data(char *arg, unsigned char *data, int maxdlen);
78 * Converts a given ASCII hex string to a (binary) byte string.
80 * A valid ASCII hex string consists of an even number of up to 16 chars.
81 * Leading zeros '00' in the ASCII hex string are interpreted.
85 * "1234" => data[0] = 0x12, data[1] = 0x34
86 * "001234" => data[0] = 0x00, data[1] = 0x12, data[2] = 0x34
90 * 1 = error (in length or the given characters are no ASCII hex characters)
92 * Remark: The not written data[] elements are initialized with zero.
96 int parse_canframe(char *cs, struct canfd_frame *cf);
98 * Transfers a valid ASCII string decribing a CAN frame into struct canfd_frame.
101 * - string layout <can_id>#{R|data}
102 * - {data} has 0 to 8 hex-values that can (optionally) be seperated by '.'
103 * - return value on successful parsing: CAN_MTU
106 * - string layout <can_id>##<flags>{data}
107 * - <flags> a single ASCII Hex value (0 .. F) which defines canfd_frame.flags
108 * - {data} has 0 to 64 hex-values that can (optionally) be seperated by '.'
109 * - return value on successful parsing: CANFD_MTU
111 * Return value on detected problems: 0
113 * <can_id> can have 3 (standard frame format) or 8 (extended frame format)
119 * 123# -> standard CAN-Id = 0x123, len = 0
120 * 12345678# -> extended CAN-Id = 0x12345678, len = 0
121 * 123#R -> standard CAN-Id = 0x123, len = 0, RTR-frame
122 * 7A1#r -> standard CAN-Id = 0x7A1, len = 0, RTR-frame
124 * 123#00 -> standard CAN-Id = 0x123, len = 1, data[0] = 0x00
125 * 123#1122334455667788 -> standard CAN-Id = 0x123, len = 8
126 * 123#11.22.33.44.55.66.77.88 -> standard CAN-Id = 0x123, len = 8
127 * 123#11.2233.44556677.88 -> standard CAN-Id = 0x123, len = 8
128 * 32345678#112233 -> error frame with CAN_ERR_FLAG (0x2000000) set
130 * 123##0112233 -> CAN FD frame standard CAN-Id = 0x123, flags = 0, len = 3
131 * 123##1112233 -> CAN FD frame, flags = CANFD_BRS, len = 3
132 * 123##2112233 -> CAN FD frame, flags = CANFD_ESI, len = 3
133 * 123##3 -> CAN FD frame, flags = (CANFD_ESI | CANFD_BRS), len = 0
135 * CAN FD extension to handle the canfd_frame.flags content
137 * Simple facts on this compact ASCII CAN frame representation:
139 * - 3 digits: standard frame format
140 * - 8 digits: extendend frame format OR error frame
141 * - 8 digits with CAN_ERR_FLAG (0x2000000) set: error frame
142 * - an error frame is never a RTR frame
143 * - CAN FD frames do not have a RTR bit
146 void fprint_canframe(FILE *stream , struct canfd_frame *cf, char *eol, int sep, int maxdlen);
147 void sprint_canframe(char *buf , struct canfd_frame *cf, int sep, int maxdlen);
149 * Creates a CAN frame hexadecimal output in compact format.
150 * The CAN data[] is seperated by '.' when sep != 0.
152 * The type of the CAN frame (CAN 2.0 / CAN FD) is specified by maxdlen:
153 * maxdlen = 8 -> CAN2.0 frame
154 * maxdlen = 64 -> CAN FD frame
156 * 12345678#112233 -> exended CAN-Id = 0x12345678, dlc = 3, data, sep = 0
157 * 12345678#R -> exended CAN-Id = 0x12345678, RTR
158 * 123#11.22.33.44.55.66.77.88 -> standard CAN-Id = 0x123, dlc = 8, sep = 1
159 * 32345678#112233 -> error frame with CAN_ERR_FLAG (0x2000000) set
160 * 123##0112233 -> CAN FD frame standard CAN-Id = 0x123, flags = 0, len = 3
161 * 123##2112233 -> CAN FD frame, flags = CANFD_ESI, len = 3
165 * fprint_canframe(stdout, &frame, "\n", 0); // with eol to STDOUT
166 * fprint_canframe(stderr, &frame, NULL, 0); // no eol to STDERR
170 #define CANLIB_VIEW_ASCII 0x1
171 #define CANLIB_VIEW_BINARY 0x2
172 #define CANLIB_VIEW_SWAP 0x4
173 #define CANLIB_VIEW_ERROR 0x8
174 #define CANLIB_VIEW_INDENT_SFF 0x10
176 #define SWAP_DELIMITER '`'
178 void fprint_long_canframe(FILE *stream , struct canfd_frame *cf, char *eol, int view, int maxdlen);
179 void sprint_long_canframe(char *buf , struct canfd_frame *cf, int view, int maxdlen);
181 * Creates a CAN frame hexadecimal output in user readable format.
183 * The type of the CAN frame (CAN 2.0 / CAN FD) is specified by maxdlen:
184 * maxdlen = 8 -> CAN2.0 frame
185 * maxdlen = 64 -> CAN FD frame
187 * 12345678 [3] 11 22 33 -> exended CAN-Id = 0x12345678, dlc = 3, data
188 * 12345678 [0] remote request -> exended CAN-Id = 0x12345678, RTR
189 * 14B0DC51 [8] 4A 94 E8 2A EC 58 55 62 'J..*.XUb' -> (with ASCII output)
190 * 20001111 [7] C6 23 7B 32 69 98 3C ERRORFRAME -> (CAN_ERR_FLAG set)
191 * 12345678 [03] 11 22 33 -> CAN FD with exended CAN-Id = 0x12345678, dlc = 3
193 * 123 [3] 11 22 33 -> CANLIB_VIEW_INDENT_SFF == 0
194 * 123 [3] 11 22 33 -> CANLIB_VIEW_INDENT_SFF == set
198 * // CAN FD frame with eol to STDOUT
199 * fprint_long_canframe(stdout, &frame, "\n", 0, CANFD_MAX_DLEN);
201 * // CAN 2.0 frame without eol to STDERR
202 * fprint_long_canframe(stderr, &frame, NULL, 0, CAN_MAX_DLEN);
206 void snprintf_can_error_frame(char *buf, size_t len, struct canfd_frame *cf,
209 * Creates a CAN error frame output in user readable format.