metrics: Handle the connection finished flushing event

Turns out, we forgot to add the METRICS connection type fo the finished
flushing handler.

Fixes #40295

Signed-off-by: David Goulet <dgoulet@torproject.org>

2 files changed, 10 insertions, 0 deletions

diff --git a/src/feature/metrics/metrics.c b/src/feature/metrics/metrics.c
index 7a77ab1104..9a72fe7145 100644
--- a/src/feature/metrics/metrics.c
+++ b/src/feature/metrics/metrics.c
@@ -258,6 +258,15 @@ metrics_connection_reached_eof(connection_t *conn)
   return 0;
 }
 
+/** Called when conn has no more bytes left on its outbuf. Return 0 indicating
+ * success. */
+int
+metrics_connection_finished_flushing(connection_t *conn)
+{
+  tor_assert(conn);
+  return 0;
+}
+
 /** Initialize the subsystem. */
 void
 metrics_init(void)
diff --git a/src/feature/metrics/metrics.h b/src/feature/metrics/metrics.h
index 858722de59..e072519d10 100644
--- a/src/feature/metrics/metrics.h
+++ b/src/feature/metrics/metrics.h
@@ -28,6 +28,7 @@ buf_t *metrics_get_output(const metrics_format_t fmt);
 /* Connection. */
 int metrics_connection_process_inbuf(struct connection_t *conn);
 int metrics_connection_reached_eof(struct connection_t *conn);
+int metrics_connection_finished_flushing(struct connection_t *conn);
 
 /* Configuration. */
 int metrics_parse_ports(or_options_t *options, smartlist_t *ports,