osmo-auc-gen: Introduce a small cmdline help/reference
diff --git a/utils/osmo-auc-gen.c b/utils/osmo-auc-gen.c
index 62b5128..93f126f 100644
--- a/utils/osmo-auc-gen.c
+++ b/utils/osmo-auc-gen.c
@@ -52,6 +52,18 @@
.algo = OSMO_AUTH_ALG_NONE,
};
+static void help()
+{
+ printf( "-2 --2g\tUse 2G (GSM) authentication\n"
+ "-3 --3g\tUse 3G (UMTS) authentication\n"
+ "-a --algorithm\tSpecify name of the algorithm\n"
+ "-k --key\tSpecify Ki / K\n"
+ "-o --opc\tSpecify OPC (only for 3G)\n"
+ "-a --amf\tSpecify AMF (only for 3G)\n"
+ "-s --sqn\tSpecify SQN (only for 3G)\n"
+ "-r --rand\tSpecify random value\n");
+}
+
int main(int argc, char **argv)
{
struct osmo_auth_vector _vec;
@@ -75,12 +87,13 @@
{ "amf", 1, 0, 'f' },
{ "sqn", 1, 0, 's' },
{ "rand", 1, 0, 'r' },
+ { "help", 0, 0, 'h' },
{ 0, 0, 0, 0 }
};
rc = 0;
- c = getopt_long(argc, argv, "23a:k:o:f:s:r:", long_options,
+ c = getopt_long(argc, argv, "23a:k:o:f:s:r:h", long_options,
&option_index);
if (c == -1)
@@ -141,6 +154,12 @@
rc = osmo_hexparse(optarg, _rand, sizeof(_rand));
rand_is_set = 1;
break;
+ case 'h':
+ help();
+ exit(0);
+ default:
+ help();
+ exit(1);
}
if (rc < 0) {
@@ -158,6 +177,12 @@
*(uint32_t *)(&_rand[12]) = rand();
}
+ if (test_aud.type == OSMO_AUTH_TYPE_NONE ||
+ test_aud.algo == OSMO_AUTH_ALG_NONE) {
+ help();
+ exit(2);
+ }
+
memset(vec, 0, sizeof(*vec));
rc = osmo_auth_gen_vec(vec, &test_aud, _rand);