MINOR: quic: Wrong value for version negotiation packet 'Unused' field

The seven less significant bits of the first byte must be arbitrary.
Without this fix, QUIC tracker "version_negotiation" test could not pass.

diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index 86c7ff8..6b45630 100644 (file)
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -3551,8 +3551,10 @@ static int qc_send_version_negotiation(int fd, struct sockaddr_storage *addr,
         * header form
         * long header, fixed bit to 0 for Version Negotiation
         */
-       buf[i++] = '\x80';
+       if (RAND_bytes((unsigned char *)buf, 1) != 1)
+               return 1;
 
+       buf[i++] |= '\x80';
        /* null version for Version Negotiation */
        buf[i++] = '\x00';
        buf[i++] = '\x00';