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diff src/event/ngx_event_quic.h @ 8345:6481427ca3fc quic

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Respecting maximum packet size. The header size macros for long and short packets were fixed to provide correct values in bytes. Currently the sending code limits frames so they don't exceed max_packet_size. But it does not account the case when a single frame can exceed the limit. As a result of this patch, big payload (CRYPTO and STREAM) will be split into a number of smaller frames that fit into advertised max_packet_size (which specifies final packet size, after encryption).
author Vladimir Homutov <vl@nginx.com>
date Mon, 20 Apr 2020 22:25:22 +0300
parents 72d20158c814
children a5141e6b3214
line wrap: on
line diff
--- a/src/event/ngx_event_quic.h
+++ b/src/event/ngx_event_quic.h
@@ -14,13 +14,16 @@
 #define NGX_QUIC_DRAFT_VERSION               27
 #define NGX_QUIC_VERSION  (0xff000000 + NGX_QUIC_DRAFT_VERSION)
 
-#define NGX_QUIC_MAX_SHORT_HEADER            25
-#define NGX_QUIC_MAX_LONG_HEADER             346
+#define NGX_QUIC_MAX_SHORT_HEADER            25 /* 1 flags + 20 dcid + 4 pn */
+#define NGX_QUIC_MAX_LONG_HEADER             56
+    /* 1 flags + 4 version + 2 x (1 + 20) s/dcid + 4 pn + 4 len + token len */
 
 #define NGX_QUIC_DEFAULT_MAX_PACKET_SIZE     65527
 #define NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT  3
 #define NGX_QUIC_DEFAULT_MAX_ACK_DELAY       25
 
+#define NGX_QUIC_MIN_INITIAL_SIZE            1200
+
 #define NGX_QUIC_STREAM_SERVER_INITIATED     0x01
 #define NGX_QUIC_STREAM_UNIDIRECTIONAL       0x02