6 * lib.c - library for command line tools
8 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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24 * software may be distributed under the terms of the GNU General
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28 * The provided data structures and external interfaces from this code
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51 #include <sys/socket.h> /* for sa_family_t */
52 #include <linux/can.h>
56 #define CANID_DELIM '#'
57 #define DATA_SEPERATOR '.'
59 #define MAX_CANFRAME "12345678#01.23.45.67.89.AB.CD.EF"
60 #define MAX_LONG_CANFRAME "12345678 [8] 10101010 10101010 10101010 10101010 10101010 10101010 10101010 10101010 '........'"
62 unsigned char asc2nibble(char c) {
64 if ((c >= '0') && (c <= '9'))
67 if ((c >= 'A') && (c <= 'F'))
70 if ((c >= 'a') && (c <= 'f'))
73 return 16; /* error */
76 int hexstring2candata(char *arg, struct can_frame *cf) {
78 int len = strlen(arg);
82 if (!len || len%2 || len > 16)
85 for (i=0; i < len/2; i++) {
87 tmp = asc2nibble(*(arg+(2*i)));
91 cf->data[i] = (tmp << 4);
93 tmp = asc2nibble(*(arg+(2*i)+1));
103 int parse_canframe(char *cs, struct can_frame *cf) {
104 /* documentation see lib.h */
106 int i, idx, dlc, len;
110 //printf("'%s' len %d\n", cs, len);
112 memset(cf, 0, sizeof(*cf)); /* init CAN frame, e.g. DLC = 0 */
117 if (cs[3] == CANID_DELIM) { /* 3 digits */
121 if ((tmp = asc2nibble(cs[i])) > 0x0F)
123 cf->can_id |= (tmp << (2-i)*4);
126 } else if (cs[8] == CANID_DELIM) { /* 8 digits */
130 if ((tmp = asc2nibble(cs[i])) > 0x0F)
132 cf->can_id |= (tmp << (7-i)*4);
134 if (!(cf->can_id & CAN_ERR_FLAG)) /* 8 digits but no errorframe? */
135 cf->can_id |= CAN_EFF_FLAG; /* then it is an extended frame */
140 if((cs[idx] == 'R') || (cs[idx] == 'r')){ /* RTR frame */
141 cf->can_id |= CAN_RTR_FLAG;
145 for (i=0, dlc=0; i<8; i++){
147 if(cs[idx] == DATA_SEPERATOR) /* skip (optional) seperator */
150 if(idx >= len) /* end of string => end of data */
153 if ((tmp = asc2nibble(cs[idx++])) > 0x0F)
155 cf->data[i] = (tmp << 4);
156 if ((tmp = asc2nibble(cs[idx++])) > 0x0F)
167 void fprint_canframe(FILE *stream , struct can_frame *cf, char *eol, int sep) {
168 /* documentation see lib.h */
170 char buf[sizeof(MAX_CANFRAME)+1]; /* max length */
172 sprint_canframe(buf, cf, sep);
173 fprintf(stream, "%s", buf);
175 fprintf(stream, "%s", eol);
178 void sprint_canframe(char *buf , struct can_frame *cf, int sep) {
179 /* documentation see lib.h */
182 int dlc = (cf->can_dlc > 8)? 8 : cf->can_dlc;
184 if (cf->can_id & CAN_ERR_FLAG) {
185 sprintf(buf, "%08X#", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
187 } else if (cf->can_id & CAN_EFF_FLAG) {
188 sprintf(buf, "%08X#", cf->can_id & CAN_EFF_MASK);
191 sprintf(buf, "%03X#", cf->can_id & CAN_SFF_MASK);
195 if (cf->can_id & CAN_RTR_FLAG) /* there are no ERR frames with RTR */
196 sprintf(buf+offset, "R");
198 for (i = 0; i < dlc; i++) {
199 sprintf(buf+offset, "%02X", cf->data[i]);
201 if (sep && (i+1 < dlc))
202 sprintf(buf+offset++, ".");
208 void fprint_long_canframe(FILE *stream , struct can_frame *cf, char *eol, int view) {
209 /* documentation see lib.h */
211 char buf[sizeof(MAX_LONG_CANFRAME)+1]; /* max length */
213 sprint_long_canframe(buf, cf, view);
214 fprintf(stream, "%s", buf);
216 fprintf(stream, "%s", eol);
219 void sprint_long_canframe(char *buf , struct can_frame *cf, int view) {
220 /* documentation see lib.h */
222 int i, j, dlen, offset;
223 int dlc = (cf->can_dlc > 8)? 8 : cf->can_dlc;
225 if (cf->can_id & CAN_ERR_FLAG) {
226 sprintf(buf, "%8X ", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
228 } else if (cf->can_id & CAN_EFF_FLAG) {
229 sprintf(buf, "%8X ", cf->can_id & CAN_EFF_MASK);
232 sprintf(buf, "%3X ", cf->can_id & CAN_SFF_MASK);
236 sprintf(buf+offset, "[%d]", dlc);
239 if (cf->can_id & CAN_RTR_FLAG) { /* there are no ERR frames with RTR */
240 sprintf(buf+offset, " remote request");
244 if (view & CANLIB_VIEW_BINARY) {
245 dlen = 9; /* _10101010 */
246 if (view & CANLIB_VIEW_SWAP) {
247 for (i = dlc - 1; i >= 0; i--) {
248 buf[offset++] = (i == dlc-1)?' ':SWAP_DELIMITER;
249 for (j = 7; j >= 0; j--)
250 buf[offset++] = (1<<j & cf->data[i])?'1':'0';
253 for (i = 0; i < dlc; i++) {
255 for (j = 7; j >= 0; j--)
256 buf[offset++] = (1<<j & cf->data[i])?'1':'0';
259 buf[offset] = 0; /* terminate string */
262 if (view & CANLIB_VIEW_SWAP) {
263 for (i = dlc - 1; i >= 0; i--) {
264 sprintf(buf+offset, "%c%02X",
265 (i == dlc-1)?' ':SWAP_DELIMITER,
270 for (i = 0; i < dlc; i++) {
271 sprintf(buf+offset, " %02X", cf->data[i]);
277 if (cf->can_id & CAN_ERR_FLAG)
278 sprintf(buf+offset, "%*s", dlen*(8-dlc)+13, "ERRORFRAME");
279 else if (view & CANLIB_VIEW_ASCII) {
281 if (view & CANLIB_VIEW_SWAP) {
282 sprintf(buf+offset, "%*s", j, "`");
284 for (i = dlc - 1; i >= 0; i--)
285 if ((cf->data[i] > 0x1F) && (cf->data[i] < 0x7F))
286 buf[offset++] = cf->data[i];
290 sprintf(buf+offset, "`");
292 sprintf(buf+offset, "%*s", j, "'");
294 for (i = 0; i < dlc; i++)
295 if ((cf->data[i] > 0x1F) && (cf->data[i] < 0x7F))
296 buf[offset++] = cf->data[i];
300 sprintf(buf+offset, "'");