MINOR: mux-h2/traces: add a missing trace on negative initial window size

When a negative initial windows size is reported, we're going to close
the connection, so it's important to report a trace to explain why!
This should be backported at least to 3.1 and possibly 3.0 (adapting the
context since there's no glitches there).

diff --git a/src/mux_h2.c b/src/mux_h2.c
index 4479a311c163abe78a0240dad92e955d2c7fbbc0..faea974d66b9547291683a6858c95037e18496d2 100644 (file)
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -2667,6 +2667,7 @@ static int h2c_handle_settings(struct h2c *h2c)
                        if (arg < 0) { // RFC7540#6.5.2
                                error = H2_ERR_FLOW_CONTROL_ERROR;
                                h2c_report_glitch(h2c, 1);
+                               TRACE_STATE("negative INITIAL_WINDOW_SIZE", H2_EV_RX_FRAME|H2_EV_RX_SETTINGS|H2_EV_H2C_ERR|H2_EV_PROTO_ERR, h2c->conn);
                                goto fail;
                        }
                        /* Let's count a glitch here in case of a reduction