[PATCH 1 of 4] QUIC: removed path->limited flag

[Roman Arutyunyan]

# HG changeset patch
# User Roman Arutyunyan <arut at nginx.com>
# Date 1688651341 -14400
#      Thu Jul 06 17:49:01 2023 +0400
# Node ID df01e8582189126cd5defd8f4bb021fec1a1a35a
# Parent  77c1418916f7817a0d020f28d8a08f278a12fe43
QUIC: removed path->limited flag.

Its value is the opposite of path->validated.

diff --git a/src/event/quic/ngx_event_quic.c b/src/event/quic/ngx_event_quic.c
--- a/src/event/quic/ngx_event_quic.c
+++ b/src/event/quic/ngx_event_quic.c
@@ -1013,7 +1013,6 @@ ngx_quic_handle_payload(ngx_connection_t
 
         if (!qc->path->validated) {
             qc->path->validated = 1;
-            qc->path->limited = 0;
             ngx_quic_path_dbg(c, "in handshake", qc->path);
             ngx_post_event(&qc->push, &ngx_posted_events);
         }
diff --git a/src/event/quic/ngx_event_quic_connection.h b/src/event/quic/ngx_event_quic_connection.h
--- a/src/event/quic/ngx_event_quic_connection.h
+++ b/src/event/quic/ngx_event_quic_connection.h
@@ -101,7 +101,6 @@ struct ngx_quic_path_s {
     u_char                            text[NGX_SOCKADDR_STRLEN];
     unsigned                          validated:1;
     unsigned                          validating:1;
-    unsigned                          limited:1;
 };
 
 
diff --git a/src/event/quic/ngx_event_quic_migration.c b/src/event/quic/ngx_event_quic_migration.c
--- a/src/event/quic/ngx_event_quic_migration.c
+++ b/src/event/quic/ngx_event_quic_migration.c
@@ -168,7 +168,6 @@ valid:
 
     path->validated = 1;
     path->validating = 0;
-    path->limited = 0;
 
     ngx_quic_set_path_timer(c);
 
@@ -208,8 +207,6 @@ ngx_quic_new_path(ngx_connection_t *c,
     path->cid = cid;
     cid->used = 1;
 
-    path->limited = 1;
-
     path->seqnum = qc->path_seqnum++;
 
     path->sockaddr = &path->sa.sockaddr;
@@ -665,7 +662,6 @@ ngx_quic_path_validation_handler(ngx_eve
 
         path->validated = 0;
         path->validating = 0;
-        path->limited = 1;
 
 
         /* RFC 9000, 9.3.2.  On-Path Address Spoofing
diff --git a/src/event/quic/ngx_event_quic_migration.h b/src/event/quic/ngx_event_quic_migration.h
--- a/src/event/quic/ngx_event_quic_migration.h
+++ b/src/event/quic/ngx_event_quic_migration.h
@@ -18,11 +18,10 @@
 #define NGX_QUIC_PATH_BACKUP    2
 
 #define ngx_quic_path_dbg(c, msg, path)                                       \
-    ngx_log_debug7(NGX_LOG_DEBUG_EVENT, c->log, 0,                            \
-                   "quic path seq:%uL %s sent:%O recvd:%O state:%s%s%s",      \
+    ngx_log_debug6(NGX_LOG_DEBUG_EVENT, c->log, 0,                            \
+                   "quic path seq:%uL %s sent:%O recvd:%O state:%s%s",        \
                    path->seqnum, msg, path->sent, path->received,             \
-                   path->limited ? "L" : "", path->validated ? "V": "N",      \
-                   path->validating ? "R": "");
+                   path->validated ? "V": "N", path->validating ? "R": "");
 
 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);
diff --git a/src/event/quic/ngx_event_quic_output.c b/src/event/quic/ngx_event_quic_output.c
--- a/src/event/quic/ngx_event_quic_output.c
+++ b/src/event/quic/ngx_event_quic_output.c
@@ -281,7 +281,7 @@ ngx_quic_allow_segmentation(ngx_connecti
         return 0;
     }
 
-    if (qc->path->limited) {
+    if (!qc->path->validated) {
         /* don't even try to be faster on non-validated paths */
         return 0;
     }
@@ -1278,7 +1278,7 @@ ngx_quic_path_limit(ngx_connection_t *c,
 {
     off_t  max;
 
-    if (path->limited) {
+    if (!path->validated) {
         max = path->received * 3;
         max = (path->sent >= max) ? 0 : max - path->sent;
 
diff --git a/src/event/quic/ngx_event_quic_socket.c b/src/event/quic/ngx_event_quic_socket.c
--- a/src/event/quic/ngx_event_quic_socket.c
+++ b/src/event/quic/ngx_event_quic_socket.c
@@ -82,7 +82,6 @@ ngx_quic_open_sockets(ngx_connection_t *
 
     if (pkt->validated) {
         qc->path->validated = 1;
-        qc->path->limited = 0;
     }
 
     ngx_quic_path_dbg(c, "set active", qc->path);