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diff src/event/quic/ngx_event_quic_migration.h @ 9147:58afcd72446f

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QUIC: path MTU discovery. MTU selection starts by doubling the initial MTU until the first failure. Then binary search is used to find the path MTU.
author Roman Arutyunyan <arut@nginx.com>
date Mon, 14 Aug 2023 09:21:27 +0400
parents bba136612fe4
children cc16989c6d61
line wrap: on
line diff
--- a/src/event/quic/ngx_event_quic_migration.h
+++ b/src/event/quic/ngx_event_quic_migration.h
@@ -18,10 +18,10 @@
 #define NGX_QUIC_PATH_BACKUP    2
 
 #define ngx_quic_path_dbg(c, msg, path)                                       \
-    ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0,                            \
-                   "quic path seq:%uL %s sent:%O recvd:%O state:%s%s",        \
+    ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0,                            \
+                   "quic path seq:%uL %s tx:%O rx:%O valid:%ui st:%d mtu:%uz",\
                    path->seqnum, msg, path->sent, path->received,             \
-                   path->validated ? "V": "N", path->validating ? "R": "");
+                   path->validated, path->state, path->mtu);
 
 ngx_int_t ngx_quic_handle_path_challenge_frame(ngx_connection_t *c,
     ngx_quic_header_t *pkt, ngx_quic_path_challenge_frame_t *f);
@@ -36,6 +36,10 @@ ngx_int_t ngx_quic_set_path(ngx_connecti
 ngx_int_t ngx_quic_handle_migration(ngx_connection_t *c,
     ngx_quic_header_t *pkt);
 
-void ngx_quic_path_validation_handler(ngx_event_t *ev);
+void ngx_quic_path_handler(ngx_event_t *ev);
+
+void ngx_quic_discover_path_mtu(ngx_connection_t *c, ngx_quic_path_t *path);
+ngx_int_t ngx_quic_handle_path_mtu(ngx_connection_t *c,
+    ngx_quic_path_t *path, uint64_t min, uint64_t max);
 
 #endif /* _NGX_EVENT_QUIC_MIGRATION_H_INCLUDED_ */