srd: deal with invalid probe specifications better

diff --git a/controller.c b/controller.c
index d79c607d550f0c3356ee23147c74cfbf56c77746..845208a7c2f5041a9e471ba101f58b932ecb56c0 100644 (file)
--- a/controller.c
+++ b/controller.c
@@ -296,7 +296,7 @@ int srd_instance_set_probes(struct srd_decoder_instance *di,
        GSList *sl;
        struct srd_probe *p;
        int *new_probemap, new_probenum;
-       char *probe_id;
+       char *probe_id, *probenum_str;
 
        if (g_hash_table_size(new_probes) == 0)
                /* No probes provided. */
@@ -318,7 +318,14 @@ int srd_instance_set_probes(struct srd_decoder_instance *di,
 
        for (l = g_hash_table_get_keys(new_probes); l; l = l->next) {
                probe_id = l->data;
-               new_probenum = strtol(g_hash_table_lookup(new_probes, probe_id), NULL, 10);
+               probenum_str = g_hash_table_lookup(new_probes, probe_id);
+               if (!probenum_str) {
+                       /* Probe name was specified without a value. */
+                       srd_err("No probe number was specified for %s.", probe_id);
+                       g_free(new_probemap);
+                       return SRD_ERR_ARG;
+               }
+               new_probenum = strtol(probenum_str, NULL, 10);
                if (!(sl = g_slist_find_custom(di->decoder->probes, probe_id,
                                (GCompareFunc)compare_probe_id))) {
                        /* Fall back on optional probes. */