canfd: upgrade tools to support CAN FD for Linux 3.6

This is a major upgrade of the basic tools to handle CAN FD frames.
The library to parse and print CAN frames and logfiles has been extended.

In detail:

 asc2log.c      |    5 +
 candump.c      |   24 ++++---
 cangen.c       |  172 +++++++++++++++++++++++++++++++++------------------
 canlogserver.c |   28 +++++---
 canplayer.c    |   25 ++++---
 cansend.c      |   55 ++++++++++++----
 lib.c          |  189 ++++++++++++++++++++++++++++++++++++++-------------------
 lib.h          |  109 ++++++++++++++++++++++++--------
 log2asc.c      |    8 +-
 log2long.c     |   26 ++++++-
 10 files changed, 440 insertions(+), 201 deletions(-)

asc2log.c / log2asc.c
- updates for new lib functions
- still can only handle CAN2.0 frames (no new info about ASC file layout)

log2long.c / canlogserver.c / canplayer.c
- updates for new lib functions to handle CAN FD

lib.h / lib.c
- reworked lib functions to handle CAN FD
- parse_canframe() now returns CAN_MTU and CANFD_MTU on success, 0 at failure
- added can_dlc2len() and can_len2dlc() helpers
- moved hexstring2candata to hexstring2data to support simple byte buffers
- in the long CAN frame representation use %03X/%08X instead of %3X/%8X
- introduced unified buffer size definitions for ASCII CAN frames
- updated documentation

cangen.c
- support CAN FD frames (added -f option to create CAN FD frames)
- added -m option ('mix') to create random extended / RTR / CAN FD frames
- fixed the 'fixed data' option which was zero'ing the payload by the time
- updated help text

candump.c
- support CAN FD frames (print, bridge, log)
- distinguish frame types by length info: [0] = CAN2.0 [00] = CAN FD frame

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>

log2asc.c

@@ -73,7 +73,7 @@ int main(int argc, char **argv)
 {
 	static char buf[BUFSZ], device[BUFSZ], ascframe[BUFSZ], id[10];
 
-	struct can_frame cf;
+	struct canfd_frame cf;
 	static struct timeval tv, start_tv;
 	FILE *infile = stdin;
 	FILE *outfile = stdout;
@@ -162,7 +162,7 @@ int main(int argc, char **argv)
 		}
 
 		if (devno) { /* only convert for selected CAN devices */
-			if (parse_canframe(ascframe, &cf))
+			if (parse_canframe(ascframe, &cf) != CAN_MTU) /* no CAN FD support so far */
 				return 1;
 
 			tv.tv_sec  = tv.tv_sec - start_tv.tv_sec;
@@ -189,9 +189,9 @@ int main(int argc, char **argv)
 				if (cf.can_id & CAN_RTR_FLAG)
 					fprintf(outfile, "r"); /* RTR frame */
 				else {
-					fprintf(outfile, "d %d", cf.can_dlc); /* data frame */
+					fprintf(outfile, "d %d", cf.len); /* data frame */
 		    
-					for (i = 0; i < cf.can_dlc; i++) {
+					for (i = 0; i < cf.len; i++) {
 						fprintf(outfile, " %02X", cf.data[i]);
 					}
 				}