6 * lib.c - library for command line tools
8 * Copyright (c) 2002-2005 Volkswagen Group Electronic Research
11 * Redistribution and use in source and binary forms, with or without
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, the following disclaimer and
16 * the referenced file 'COPYING'.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of Volkswagen nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * Alternatively, provided that this notice is retained in full, this
25 * software may be distributed under the terms of the GNU General
26 * Public License ("GPL") version 2 as distributed in the 'COPYING'
27 * file from the main directory of the linux kernel source.
29 * The provided data structures and external interfaces from this code
30 * are not restricted to be used by modules with a GPL compatible license.
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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38 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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45 * Send feedback to <socketcan-users@lists.berlios.de>
52 #include <sys/socket.h> /* for sa_family_t */
53 #include <linux/can.h>
55 #define CANID_DELIM '#'
56 #define DATA_SEPERATOR '.'
58 static int asc2nibble(char c){
60 if ((c >= '0') && (c <= '9'))
63 if ((c >= 'A') && (c <= 'F'))
66 if ((c >= 'a') && (c <= 'f'))
69 return 16; /* error */
72 int parse_canframe(char *cs, struct can_frame *cf){
73 /* documentation see lib.h */
75 int i, idx, dlc, len, tmp;
78 //printf("'%s' len %d\n", cs, len);
80 memset(cf, 0, sizeof(*cf)); /* init CAN frame, e.g. DLC = 0 */
85 if (!((cs[3] == CANID_DELIM) || (cs[8] == CANID_DELIM)))
88 if (cs[8] == CANID_DELIM) {
91 cf->can_id = CAN_EFF_FLAG;
93 if ((tmp = asc2nibble(cs[i])) > 0x0F)
95 cf->can_id |= (tmp << (7-i)*4);
102 if ((tmp = asc2nibble(cs[i])) > 0x0F)
104 cf->can_id |= (tmp << (2-i)*4);
108 if((cs[idx] == 'R') || (cs[idx] == 'r')){ /* RTR frame */
109 cf->can_id |= CAN_RTR_FLAG;
113 for (i=0, dlc=0; i<8; i++){
115 if(cs[idx] == DATA_SEPERATOR) /* skip (optional) seperator */
118 if(idx >= len) /* end of string => end of data */
121 if ((tmp = asc2nibble(cs[idx++])) > 0x0F)
123 cf->data[i] = (tmp << 4);
124 if ((tmp = asc2nibble(cs[idx++])) > 0x0F)
135 void fprint_canframe(FILE *stream , struct can_frame *cf, char *eol){
136 /* documentation see lib.h */
140 if (cf->can_id & CAN_EFF_FLAG)
141 fprintf(stream, "%8X ", cf->can_id & CAN_EFF_MASK);
143 fprintf(stream, "%3X ", cf->can_id & CAN_SFF_MASK);
145 fprintf(stream, "[%d] ", cf->can_dlc);
147 for (i = 0; i < cf->can_dlc; i++) {
148 fprintf(stream, "%02X ", cf->data[i]);
150 if (cf->can_id & CAN_RTR_FLAG)
151 fprintf(stream, "remote request");
153 fprintf(stream, "%s", eol);