MINOR: h2: don't try to send data before preface

h2_snd_buf() must not accept to send data if the preface was not yet
received nor sent. At the moment it doesn't happen but it can with
server-side H2.

diff --git a/src/mux_h2.c b/src/mux_h2.c
index c01a42a299bb3490576eee47731119dccc2079bb..c380dc9afafe495ca78f0ec33843f2fb630c3ce7 100644 (file)
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -3615,6 +3615,9 @@ static size_t h2_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t coun
        size_t total = 0;
        size_t ret;
 
+       if (h2s->h2c->st0 < H2_CS_FRAME_H)
+               return 0;
+
        if (!(h2s->flags & H2_SF_OUTGOING_DATA) && count)
                h2s->flags |= H2_SF_OUTGOING_DATA;