diff options
| -rw-r--r-- | staging/mausezahn.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/staging/mausezahn.c b/staging/mausezahn.c index f5b470f..83ce424 100644 --- a/staging/mausezahn.c +++ b/staging/mausezahn.c @@ -357,6 +357,7 @@ int getopts (int argc, char *argv[]) char *packet_type=NULL, *mops_type=NULL; char *dum; unsigned char *dum1, *dum2; + bool do_help = false; libnet_t *l; char err_buf[LIBNET_ERRBUF_SIZE]; @@ -575,12 +576,17 @@ int getopts (int argc, char *argv[]) } else { /// arg_string given => no device has been specified -- let's find one! strncpy (tx.arg_string, argv[optind], MAX_PAYLOAD_SIZE); - if (lookupdev()) { // no device found - if (verbose) fprintf(stderr, " mz: no active interfaces found!\n"); - strcpy(tx.device, "lo"); + do_help = !!getarg(tx.arg_string,"help", NULL); + if (!do_help) { + if (lookupdev()) { + /* no device found */ + if (verbose) + fprintf(stderr, " mz: no active interfaces found!\n"); + strcpy(tx.device, "lo"); + } + if (verbose) + fprintf(stderr," mz: device not given, will use %s\n",tx.device); } - if (verbose) - fprintf(stderr," mz: device not given, will use %s\n",tx.device); } break; case 2: // both device and arg_string given @@ -610,7 +616,7 @@ int getopts (int argc, char *argv[]) // Get own device MAC address: // Don't open context if only a help text is requested - if (getarg(tx.arg_string,"help", NULL)!=1) { + if (!do_help && getarg(tx.arg_string,"help", NULL) !=1) { l = libnet_init (LIBNET_LINK_ADV, tx.device, err_buf ); if (l == NULL) { fprintf(stderr, " mz/getopts: libnet_init() failed (%s)", err_buf); |