# HG changeset patch
# User Ruslan Ermilov <ru@nginx.com>
# Date 1621529956 -10800
# Node ID 2ab7b55ae4a02745e2c15035fcf46ef84ebbfde3
# Parent  5772da03faf8fc0b3058bf529134312373d4d129
Stream: the "fastopen" parameter of the "listen" directive.

Based on a patch by Anbang Wen.

diff --git a/src/stream/ngx_stream.c b/src/stream/ngx_stream.c
--- a/src/stream/ngx_stream.c
+++ b/src/stream/ngx_stream.c
@@ -510,6 +510,10 @@ ngx_stream_optimize_servers(ngx_conf_t *
             ls->ipv6only = addr[i].opt.ipv6only;
 #endif
 
+#if (NGX_HAVE_TCP_FASTOPEN)
+            ls->fastopen = addr[i].opt.fastopen;
+#endif
+
 #if (NGX_HAVE_REUSEPORT)
             ls->reuseport = addr[i].opt.reuseport;
 #endif
diff --git a/src/stream/ngx_stream.h b/src/stream/ngx_stream.h
--- a/src/stream/ngx_stream.h
+++ b/src/stream/ngx_stream.h
@@ -65,6 +65,9 @@ typedef struct {
     int                            backlog;
     int                            rcvbuf;
     int                            sndbuf;
+#if (NGX_HAVE_TCP_FASTOPEN)
+    int                            fastopen;
+#endif
     int                            type;
 } ngx_stream_listen_t;
 
diff --git a/src/stream/ngx_stream_core_module.c b/src/stream/ngx_stream_core_module.c
--- a/src/stream/ngx_stream_core_module.c
+++ b/src/stream/ngx_stream_core_module.c
@@ -615,6 +615,10 @@ ngx_stream_core_listen(ngx_conf_t *cf, n
     ls->type = SOCK_STREAM;
     ls->ctx = cf->ctx;
 
+#if (NGX_HAVE_TCP_FASTOPEN)
+    ls->fastopen = -1;
+#endif
+
 #if (NGX_HAVE_INET6)
     ls->ipv6only = 1;
 #endif
@@ -635,6 +639,21 @@ ngx_stream_core_listen(ngx_conf_t *cf, n
             continue;
         }
 
+#if (NGX_HAVE_TCP_FASTOPEN)
+        if (ngx_strncmp(value[i].data, "fastopen=", 9) == 0) {
+            ls->fastopen = ngx_atoi(value[i].data + 9, value[i].len - 9);
+            ls->bind = 1;
+
+            if (ls->fastopen == NGX_ERROR) {
+                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                                   "invalid fastopen \"%V\"", &value[i]);
+                return NGX_CONF_ERROR;
+            }
+
+            continue;
+        }
+#endif
+
         if (ngx_strncmp(value[i].data, "backlog=", 8) == 0) {
             ls->backlog = ngx_atoi(value[i].data + 8, value[i].len - 8);
             ls->bind = 1;
@@ -859,6 +878,12 @@ ngx_stream_core_listen(ngx_conf_t *cf, n
         if (ls->proxy_protocol) {
             return "\"proxy_protocol\" parameter is incompatible with \"udp\"";
         }
+
+#if (NGX_HAVE_TCP_FASTOPEN)
+        if (ls->fastopen != -1) {
+            return "\"fastopen\" parameter is incompatible with \"udp\"";
+        }
+#endif
     }
 
     als = cmcf->listen.elts;