From 5a4dbb8ae37841748be2d0d97e508ea51c21ce92 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 23 May 2022 16:47:17 +0200
Subject: [PATCH] hyper: use 'alt-used'

Makes test 412+413 work

Closes #8898
---
 lib/c-hyper.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/lib/c-hyper.c b/lib/c-hyper.c
index 69082982cf..9ea2e883b9 100644
--- a/lib/c-hyper.c
+++ b/lib/c-hyper.c
@@ -1047,6 +1047,21 @@ CURLcode Curl_http(struct Curl_easy *data, bool *done)
       goto error;
   }
 
+#ifndef CURL_DISABLE_ALTSVC
+  if(conn->bits.altused && !Curl_checkheaders(data, STRCONST("Alt-Used"))) {
+    char *altused = aprintf("Alt-Used: %s:%d\r\n",
+                            conn->conn_to_host.name, conn->conn_to_port);
+    if(!altused) {
+      result = CURLE_OUT_OF_MEMORY;
+      goto error;
+    }
+    result = Curl_hyper_header(data, headers, altused);
+    if(result)
+      goto error;
+    free(altused);
+  }
+#endif
+
 #ifndef CURL_DISABLE_PROXY
   if(conn->bits.httpproxy && !conn->bits.tunnel_proxy &&
      !Curl_checkheaders(data, STRCONST("Proxy-Connection")) &&
-- 
2.47.3