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diff src/event/ngx_event_quic_transport.c @ 8594:ee06a813756c quic

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QUIC: teach how to compute only the length of created QUIC headers. It will be used for precise expansion of UDP datagram payload.
author Sergey Kandaurov <pluknet@nginx.com>
date Wed, 21 Oct 2020 12:03:23 +0100
parents d8a0bb1e85bf
children 38c7dd720774
line wrap: on
line diff
--- a/src/event/ngx_event_quic_transport.c	Wed Oct 21 12:03:22 2020 +0100
+++ b/src/event/ngx_event_quic_transport.c	Wed Oct 21 12:03:23 2020 +0100
@@ -420,6 +420,12 @@
 {
     u_char  *p, *start;
 
+    if (out == NULL) {
+        return 5 + 2 + pkt->dcid.len + pkt->scid.len
+               + ngx_quic_varint_len(pkt_len + pkt->num_len) + pkt->num_len
+               + (pkt->level == ssl_encryption_initial ? 1 : 0);
+    }
+
     p = start = out;
 
     *p++ = pkt->flags;
@@ -465,6 +471,10 @@
 {
     u_char  *p, *start;
 
+    if (out == NULL) {
+        return 1 + pkt->dcid.len + pkt->num_len;
+    }
+
     p = start = out;
 
     *p++ = pkt->flags;