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-rw-r--r--src/feature/rend/rendservice.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/feature/rend/rendservice.c b/src/feature/rend/rendservice.c
index c96ecec308..eaf0432a7d 100644
--- a/src/feature/rend/rendservice.c
+++ b/src/feature/rend/rendservice.c
@@ -130,6 +130,22 @@ static smartlist_t *rend_service_list = NULL;
* service on config reload. */
static smartlist_t *rend_service_staging_list = NULL;
+/** Helper: log the deprecation warning for version 2 only once. */
+static void
+log_once_deprecation_warning(void)
+{
+ static bool logged_once = false;
+ if (!logged_once) {
+ log_warn(LD_REND, "DEPRECATED: Onion service version 2 are deprecated. "
+ "Please use version 3 which is the default now. "
+ "Currently, version 2 is planned to be obsolete in "
+ "the Tor version 0.4.6 stable series.");
+ logged_once = true;
+ }
+}
+/** Macro to make it very explicit that we are warning about deprecation. */
+#define WARN_ONCE_DEPRECATION() log_once_deprecation_warning()
+
/* Like rend_get_service_list_mutable, but returns a read-only list. */
static const smartlist_t*
rend_get_service_list(const smartlist_t* substitute_service_list)
@@ -731,6 +747,9 @@ rend_config_service(const config_line_t *line_,
tor_assert(options);
tor_assert(config);
+ /* We are about to configure a version 2 service. Warn of deprecation. */
+ WARN_ONCE_DEPRECATION();
+
/* Use the staging service list so that we can check then do the pruning
* process using the main list at the end. */
if (rend_service_staging_list == NULL) {