fprintf(stderr, "Options: -t (preserve src_dev rx timestamp)\n");
fprintf(stderr, " -e (echo sent frames - recommended on vcanx)\n");
fprintf(stderr, " -i (allow to route to incoming interface)\n");
+ fprintf(stderr, " -l <hops> (limit the number of frame hops / routings)\n");
fprintf(stderr, " -f <filter> (set CAN filter)\n");
fprintf(stderr, " -m <mod> (set frame modifications)\n");
fprintf(stderr, " -x <from_idx>:<to_idx>:<result_idx>:<init_xor_val> (XOR checksum)\n");
case CGW_MOD_OR:
case CGW_MOD_XOR:
case CGW_MOD_SET:
+ case CGW_LIM_HOPS:
case CGW_CS_XOR:
case CGW_CS_CRC8:
break;
printmod("SET", RTA_DATA(rta));
break;
+ case CGW_LIM_HOPS:
+ printf("-l %d ", *(__u8 *)RTA_DATA(rta));
+ break;
+
case CGW_CS_XOR:
print_cs_xor((struct cgw_csum_xor *)RTA_DATA(rta));
break;
struct nlmsgerr *rte;
unsigned int src_ifindex = 0;
unsigned int dst_ifindex = 0;
+ __u8 limit_hops = 0;
__u16 flags = 0;
int len;
memset(&cs_xor, 0, sizeof(cs_xor));
memset(&cs_crc8, 0, sizeof(cs_crc8));
- while ((opt = getopt(argc, argv, "ADFLs:d:teif:c:p:x:m:?")) != -1) {
+ while ((opt = getopt(argc, argv, "ADFLs:d:teil:f:c:p:x:m:?")) != -1) {
switch (opt) {
case 'A':
flags |= CGW_FLAGS_CAN_IIF_TX_OK;
break;
+ case 'l':
+ if (sscanf(optarg, "%hhd", &limit_hops) != 1 || !(limit_hops)) {
+ printf("Bad hop limit definition '%s'.\n", optarg);
+ exit(1);
+ }
+ break;
+
case 'f':
if (sscanf(optarg, "%x:%x", &filter.can_id,
&filter.can_mask) == 2) {
if (have_cs_xor)
addattr_l(&req.nh, sizeof(req), CGW_CS_XOR, &cs_xor, sizeof(cs_xor));
+ if (limit_hops)
+ addattr_l(&req.nh, sizeof(req), CGW_LIM_HOPS, &limit_hops, sizeof(__u8));
+
/*
* a better example code
* modmsg.modtype = CGW_MOD_ID;