isotpsend: add option to automatically create test data with specifc length

[can-utils.git] / isotprecv.c

diff --git a/isotprecv.c b/isotprecv.c
index 090164d9c58c9557d875efe950799ed5225039a5..a43a25afb8a6cdb96d26561d64e53af5718f3587 100644 (file)
--- a/isotprecv.c
+++ b/isotprecv.c
@@ -1,7 +1,3 @@
-/*
- *  $Id$
- */
-
 /*
  * isotprecv.c
  *
@@ -60,6 +56,7 @@
 #include <linux/can/isotp.h>
 
 #define NO_CAN_ID 0xFFFFFFFFU
+#define BUFSIZE 5000 /* size > 4095 to check socket API internal checks */
 
 void print_usage(char *prg)
 {
@@ -91,7 +88,7 @@ int main(int argc, char **argv)
     __u32 force_rx_stmin = 0;
     int loop = 0;
 
-    unsigned char msg[4096];
+    unsigned char msg[BUFSIZE];
     int nbytes;
 
     addr.can_addr.tp.tx_id = addr.can_addr.tp.rx_id = NO_CAN_ID;
@@ -126,7 +123,7 @@ int main(int argc, char **argv)
                    else if (optarg[0] == 'c')
                            opts.flags |= CAN_ISOTP_CHK_PAD_DATA;
                    else if (optarg[0] == 'a')
-                           opts.flags |= (CAN_ISOTP_CHK_PAD_DATA | CAN_ISOTP_CHK_PAD_DATA);
+                           opts.flags |= (CAN_ISOTP_CHK_PAD_LEN | CAN_ISOTP_CHK_PAD_DATA);
                    else {
                            printf("unknown padding check option '%c'.\n", optarg[0]);
                            print_usage(basename(argv[0]));
@@ -198,8 +195,8 @@ int main(int argc, char **argv)
     }
 
     do {
-           nbytes = read(s, msg, 4096);
-           if (nbytes > 0 && nbytes < 4096)
+           nbytes = read(s, msg, BUFSIZE);
+           if (nbytes > 0 && nbytes < BUFSIZE)
                    for (i=0; i < nbytes; i++)
                            printf("%02X ", msg[i]);
            printf("\n");