# HG changeset patch
# User Roman Arutyunyan <arut@nginx.com>
# Date 1623407064 -10800
# Node ID 1fec68e322d0193b8b5aa28ddba94d30ac3266f7
# Parent  278ab0ed24f2cf9a8fc7fe740aadfad0901fc6e1
HTTP/3: client GOAWAY support.

diff --git a/src/http/v3/ngx_http_v3.c b/src/http/v3/ngx_http_v3.c
--- a/src/http/v3/ngx_http_v3.c
+++ b/src/http/v3/ngx_http_v3.c
@@ -37,6 +37,7 @@ ngx_http_v3_init_session(ngx_connection_
     }
 
     h3c->max_push_id = (uint64_t) -1;
+    h3c->goaway_push_id = (uint64_t) -1;
 
     ngx_queue_init(&h3c->blocked);
     ngx_queue_init(&h3c->pushing);
diff --git a/src/http/v3/ngx_http_v3.h b/src/http/v3/ngx_http_v3.h
--- a/src/http/v3/ngx_http_v3.h
+++ b/src/http/v3/ngx_http_v3.h
@@ -129,6 +129,7 @@ struct ngx_http_v3_session_s {
     ngx_uint_t                    npushing;
     uint64_t                      next_push_id;
     uint64_t                      max_push_id;
+    uint64_t                      goaway_push_id;
 
     ngx_uint_t                    goaway;  /* unsigned  goaway:1; */
 
diff --git a/src/http/v3/ngx_http_v3_filter_module.c b/src/http/v3/ngx_http_v3_filter_module.c
--- a/src/http/v3/ngx_http_v3_filter_module.c
+++ b/src/http/v3/ngx_http_v3_filter_module.c
@@ -805,6 +805,12 @@ ngx_http_v3_push_resource(ngx_http_reque
         return NGX_ABORT;
     }
 
+    if (h3c->goaway_push_id != (uint64_t) -1) {
+        ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
+                       "http3 abort pushes due to goaway");
+        return NGX_ABORT;
+    }
+
     if (h3c->npushing >= h3scf->max_concurrent_pushes) {
         ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
                        "http3 abort pushes due to max_concurrent_pushes");
diff --git a/src/http/v3/ngx_http_v3_parse.c b/src/http/v3/ngx_http_v3_parse.c
--- a/src/http/v3/ngx_http_v3_parse.c
+++ b/src/http/v3/ngx_http_v3_parse.c
@@ -1012,6 +1012,7 @@ ngx_http_v3_parse_control(ngx_connection
         sw_cancel_push,
         sw_settings,
         sw_max_push_id,
+        sw_goaway,
         sw_skip
     };
 
@@ -1091,6 +1092,10 @@ ngx_http_v3_parse_control(ngx_connection
             st->state = sw_max_push_id;
             break;
 
+        case NGX_HTTP_V3_FRAME_GOAWAY:
+            st->state = sw_goaway;
+            break;
+
         default:
             ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
                            "http3 parse skip unknown frame");
@@ -1157,6 +1162,26 @@ ngx_http_v3_parse_control(ngx_connection
         st->state = sw_type;
         break;
 
+    case sw_goaway:
+
+        rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, ch);
+
+        if (--st->length == 0 && rc == NGX_AGAIN) {
+            return NGX_HTTP_V3_ERR_FRAME_ERROR;
+        }
+
+        if (rc != NGX_DONE) {
+            return rc;
+        }
+
+        rc = ngx_http_v3_goaway(c, st->vlint.value);
+        if (rc != NGX_OK) {
+            return rc;
+        }
+
+        st->state = sw_type;
+        break;
+
     case sw_skip:
 
         if (--st->length == 0) {
diff --git a/src/http/v3/ngx_http_v3_streams.c b/src/http/v3/ngx_http_v3_streams.c
--- a/src/http/v3/ngx_http_v3_streams.c
+++ b/src/http/v3/ngx_http_v3_streams.c
@@ -704,6 +704,21 @@ ngx_http_v3_set_max_push_id(ngx_connecti
 
 
 ngx_int_t
+ngx_http_v3_goaway(ngx_connection_t *c, uint64_t push_id)
+{
+    ngx_http_v3_session_t  *h3c;
+
+    h3c = ngx_http_v3_get_session(c);
+
+    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 GOAWAY:%uL", push_id);
+
+    h3c->goaway_push_id = push_id;
+
+    return NGX_OK;
+}
+
+
+ngx_int_t
 ngx_http_v3_cancel_push(ngx_connection_t *c, uint64_t push_id)
 {
     ngx_queue_t            *q;
diff --git a/src/http/v3/ngx_http_v3_streams.h b/src/http/v3/ngx_http_v3_streams.h
--- a/src/http/v3/ngx_http_v3_streams.h
+++ b/src/http/v3/ngx_http_v3_streams.h
@@ -21,6 +21,7 @@ ngx_connection_t *ngx_http_v3_create_pus
     uint64_t push_id);
 ngx_int_t ngx_http_v3_set_max_push_id(ngx_connection_t *c,
     uint64_t max_push_id);
+ngx_int_t ngx_http_v3_goaway(ngx_connection_t *c, uint64_t push_id);
 ngx_int_t ngx_http_v3_cancel_push(ngx_connection_t *c, uint64_t push_id);
 ngx_int_t ngx_http_v3_cancel_stream(ngx_connection_t *c, ngx_uint_t stream_id);