nat: Factor out the config by token search
In the upcoming authentication improvements it is nice to
separate the finding of the config from the post-allow
handling of it.
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
index d95227d..d7ec545 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
@@ -180,6 +180,24 @@
return conf;
}
+struct bsc_config *bsc_config_by_token(struct bsc_nat *nat, const char *token, int len)
+{
+ struct bsc_config *conf;
+
+ llist_for_each_entry(conf, &nat->bsc_configs, entry) {
+ /*
+ * Add the '\0' of the token for the memcmp, the IPA messages
+ * for some reason added null termination.
+ */
+ const int token_len = strlen(conf->token) + 1;
+
+ if (token_len == len && memcmp(conf->token, token, token_len) == 0)
+ return conf;
+ }
+
+ return NULL;
+}
+
void bsc_config_free(struct bsc_config *cfg)
{
llist_del(&cfg->entry);