2 * lib.h - library include for command line tools
4 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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8 * modification, are permitted provided that the following conditions
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16 * may be used to endorse or promote products derived from this software
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20 * software may be distributed under the terms of the GNU General
21 * Public License ("GPL") version 2, in which case the provisions of the
22 * GPL apply INSTEAD OF those given above.
24 * The provided data structures and external interfaces from this code
25 * are not restricted to be used by modules with a GPL compatible license.
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
40 * Send feedback to <linux-can@vger.kernel.org>
44 /* buffer sizes for CAN frame string representations */
46 #define CL_ID (sizeof("12345678##1"))
47 #define CL_DATA sizeof(".AA")
48 #define CL_BINDATA sizeof(".10101010")
50 /* CAN FD ASCII hex short representation with DATA_SEPERATORs */
51 #define CL_CFSZ (2*CL_ID + 64*CL_DATA)
53 /* CAN FD ASCII hex long representation with binary output */
54 #define CL_LONGCFSZ (2*CL_ID + sizeof(" [255] ") + (64*CL_BINDATA))
56 /* CAN DLC to real data length conversion helpers especially for CAN FD */
58 /* get data length from can_dlc with sanitized can_dlc */
59 unsigned char can_dlc2len(unsigned char can_dlc);
61 /* map the sanitized data length to an appropriate data length code */
62 unsigned char can_len2dlc(unsigned char len);
64 unsigned char asc2nibble(char c);
66 * Returns the decimal value of a given ASCII hex character.
68 * While 0..9, a..f, A..F are valid ASCII hex characters.
69 * On invalid characters the value 16 is returned for error handling.
72 int hexstring2data(char *arg, unsigned char *data, int maxdlen);
74 * Converts a given ASCII hex string to a (binary) byte string.
76 * A valid ASCII hex string consists of an even number of up to 16 chars.
77 * Leading zeros '00' in the ASCII hex string are interpreted.
81 * "1234" => data[0] = 0x12, data[1] = 0x34
82 * "001234" => data[0] = 0x00, data[1] = 0x12, data[2] = 0x34
86 * 1 = error (in length or the given characters are no ASCII hex characters)
88 * Remark: The not written data[] elements are initialized with zero.
92 int parse_canframe(char *cs, struct canfd_frame *cf);
94 * Transfers a valid ASCII string decribing a CAN frame into struct canfd_frame.
97 * - string layout <can_id>#{R|data}
98 * - {data} has 0 to 8 hex-values that can (optionally) be seperated by '.'
99 * - return value on successful parsing: CAN_MTU
102 * - string layout <can_id>##<flags>{data}
103 * - <flags> a single ASCII Hex value (0 .. F) which defines canfd_frame.flags
104 * - {data} has 0 to 64 hex-values that can (optionally) be seperated by '.'
105 * - return value on successful parsing: CANFD_MTU
107 * Return value on detected problems: 0
109 * <can_id> can have 3 (standard frame format) or 8 (extended frame format)
115 * 123# -> standard CAN-Id = 0x123, len = 0
116 * 12345678# -> extended CAN-Id = 0x12345678, len = 0
117 * 123#R -> standard CAN-Id = 0x123, len = 0, RTR-frame
118 * 7A1#r -> standard CAN-Id = 0x7A1, len = 0, RTR-frame
120 * 123#00 -> standard CAN-Id = 0x123, len = 1, data[0] = 0x00
121 * 123#1122334455667788 -> standard CAN-Id = 0x123, len = 8
122 * 123#11.22.33.44.55.66.77.88 -> standard CAN-Id = 0x123, len = 8
123 * 123#11.2233.44556677.88 -> standard CAN-Id = 0x123, len = 8
124 * 32345678#112233 -> error frame with CAN_ERR_FLAG (0x2000000) set
126 * 123##0112233 -> CAN FD frame standard CAN-Id = 0x123, flags = 0, len = 3
127 * 123##1112233 -> CAN FD frame, flags = CANFD_BRS, len = 3
128 * 123##2112233 -> CAN FD frame, flags = CANFD_ESI, len = 3
129 * 123##3 -> CAN FD frame, flags = (CANFD_ESI | CANFD_BRS), len = 0
131 * CAN FD extension to handle the canfd_frame.flags content
133 * Simple facts on this compact ASCII CAN frame representation:
135 * - 3 digits: standard frame format
136 * - 8 digits: extendend frame format OR error frame
137 * - 8 digits with CAN_ERR_FLAG (0x2000000) set: error frame
138 * - an error frame is never a RTR frame
139 * - CAN FD frames do not have a RTR bit
142 void fprint_canframe(FILE *stream , struct canfd_frame *cf, char *eol, int sep, int maxdlen);
143 void sprint_canframe(char *buf , struct canfd_frame *cf, int sep, int maxdlen);
145 * Creates a CAN frame hexadecimal output in compact format.
146 * The CAN data[] is seperated by '.' when sep != 0.
148 * The type of the CAN frame (CAN 2.0 / CAN FD) is specified by maxdlen:
149 * maxdlen = 8 -> CAN2.0 frame
150 * maxdlen = 64 -> CAN FD frame
152 * 12345678#112233 -> exended CAN-Id = 0x12345678, dlc = 3, data, sep = 0
153 * 12345678#R -> exended CAN-Id = 0x12345678, RTR
154 * 123#11.22.33.44.55.66.77.88 -> standard CAN-Id = 0x123, dlc = 8, sep = 1
155 * 32345678#112233 -> error frame with CAN_ERR_FLAG (0x2000000) set
156 * 123##0112233 -> CAN FD frame standard CAN-Id = 0x123, flags = 0, len = 3
157 * 123##2112233 -> CAN FD frame, flags = CANFD_ESI, len = 3
161 * fprint_canframe(stdout, &frame, "\n", 0); // with eol to STDOUT
162 * fprint_canframe(stderr, &frame, NULL, 0); // no eol to STDERR
166 #define CANLIB_VIEW_ASCII 0x1
167 #define CANLIB_VIEW_BINARY 0x2
168 #define CANLIB_VIEW_SWAP 0x4
169 #define CANLIB_VIEW_ERROR 0x8
170 #define CANLIB_VIEW_INDENT_SFF 0x10
172 #define SWAP_DELIMITER '`'
174 void fprint_long_canframe(FILE *stream , struct canfd_frame *cf, char *eol, int view, int maxdlen);
175 void sprint_long_canframe(char *buf , struct canfd_frame *cf, int view, int maxdlen);
177 * Creates a CAN frame hexadecimal output in user readable format.
179 * The type of the CAN frame (CAN 2.0 / CAN FD) is specified by maxdlen:
180 * maxdlen = 8 -> CAN2.0 frame
181 * maxdlen = 64 -> CAN FD frame
183 * 12345678 [3] 11 22 33 -> exended CAN-Id = 0x12345678, dlc = 3, data
184 * 12345678 [0] remote request -> exended CAN-Id = 0x12345678, RTR
185 * 14B0DC51 [8] 4A 94 E8 2A EC 58 55 62 'J..*.XUb' -> (with ASCII output)
186 * 20001111 [7] C6 23 7B 32 69 98 3C ERRORFRAME -> (CAN_ERR_FLAG set)
187 * 12345678 [03] 11 22 33 -> CAN FD with exended CAN-Id = 0x12345678, dlc = 3
189 * 123 [3] 11 22 33 -> CANLIB_VIEW_INDENT_SFF == 0
190 * 123 [3] 11 22 33 -> CANLIB_VIEW_INDENT_SFF == set
194 * // CAN FD frame with eol to STDOUT
195 * fprint_long_canframe(stdout, &frame, "\n", 0, CANFD_MAX_DLEN);
197 * // CAN 2.0 frame without eol to STDERR
198 * fprint_long_canframe(stderr, &frame, NULL, 0, CAN_MAX_DLEN);
202 void snprintf_can_error_frame(char *buf, size_t len, struct canfd_frame *cf,
205 * Creates a CAN error frame output in user readable format.