commit b404f085adb54f20c7a5084c2b92609dce422db1 Author: David Goulet <dgoulet@torproject.org> Date: Wed Jul 1 10:53:30 2020 -0400 hs-v2: Add deprecation warning for service If at least one service is configured as a version 2, a log warning is emitted once and only once. Closes #40003 Signed-off-by: David Goulet <dgoulet@torproject.org> --- changes/ticket40003 | 3 +++ src/feature/rend/rendservice.c | 19 +++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/changes/ticket40003 b/changes/ticket40003 new file mode 100644 index 0000000000..240f464353 --- /dev/null +++ b/changes/ticket40003 @@ -0,0 +1,3 @@ + o Deprecated features (onion service v2): + - Add deprecation warning for onion service version 2. Tor now logs a + warning once if a version 2 service is configured. Closes ticket 40003. 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) {