candump: Added '-u <usecs>' commandline option to delay bridged CAN frames by

usecs microseconds.

git-svn-id: svn://svn.berlios.de//socketcan/trunk@1217 030b6a49-0b11-0410-94ab-b0dab22257f2

diff --git a/can-utils/candump.c b/can-utils/candump.c
index 7aeeef576837fe57275f5e4da54e93b78b07c81c..0581a3d3fa8e6e1fae4f82372a1f1cdb7d82f78c 100644 (file)
--- a/can-utils/candump.c
+++ b/can-utils/candump.c
@@ -115,6 +115,7 @@ void print_usage(char *prg)
        fprintf(stderr, "         -s <level>  (silent mode - %d: off (default) %d: animation %d: silent)\n", SILENT_OFF, SILENT_ANI, SILENT_ON);
        fprintf(stderr, "         -b <can>    (bridge mode - send received frames to <can>)\n");
        fprintf(stderr, "         -B <can>    (bridge mode - like '-b' with disabled loopback)\n");
+       fprintf(stderr, "         -u <usecs>  (delay bridge forwarding by <usecs> microseconds)\n");
        fprintf(stderr, "         -l          (log CAN-frames into file. Sets '-s %d' by default)\n", SILENT_ON);
        fprintf(stderr, "         -L          (use log file format on stdout)\n");
        fprintf(stderr, "         -n <count>  (terminate after receiption of <count> CAN frames)\n");
@@ -200,6 +201,7 @@ int main(int argc, char **argv)
        fd_set rdfs;
        int s[MAXSOCK];
        int bridge = 0;
+       useconds_t bridge_delay = 0;
        unsigned char timestamp = 0;
        unsigned char dropmonitor = 0;
        unsigned char silent = SILENT_INI;
@@ -233,7 +235,7 @@ int main(int argc, char **argv)
        last_tv.tv_sec  = 0;
        last_tv.tv_usec = 0;
 
-       while ((opt = getopt(argc, argv, "t:ciaSs:b:B:ldLn:r:h?")) != -1) {
+       while ((opt = getopt(argc, argv, "t:ciaSs:b:B:u:ldLn:r:h?")) != -1) {
                switch (opt) {
                case 't':
                        timestamp = optarg[0];
@@ -308,6 +310,10 @@ int main(int argc, char **argv)
                        }
                        break;
            
+               case 'u':
+                       bridge_delay = (useconds_t)strtoul(optarg, (char **)NULL, 10);
+                       break;
+
                case 'l':
                        log = 1;
                        break;
@@ -609,6 +615,9 @@ int main(int argc, char **argv)
                                        running = 0;
 
                                if (bridge) {
+                                       if (bridge_delay)
+                                               usleep(bridge_delay);
+
                                        nbytes = write(bridge, &frame, sizeof(struct can_frame));
                                        if (nbytes < 0) {
                                                perror("bridge write");