From 3e4f257b9193e704fe790077b44f235e01101f52 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Thu, 3 May 2018 20:29:16 +0900
Subject: [PATCH] asio: Support client side SNI

---
 src/asio_client_session_tls_impl.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/asio_client_session_tls_impl.cc b/src/asio_client_session_tls_impl.cc
index f1c21330..377886ca 100644
--- a/src/asio_client_session_tls_impl.cc
+++ b/src/asio_client_session_tls_impl.cc
@@ -38,6 +38,10 @@ session_tls_impl::session_tls_impl(
   // ssl::context::set_verify_mode(boost::asio::ssl::verify_peer) is
   // not used, which is what we want.
   socket_.set_verify_callback(boost::asio::ssl::rfc2818_verification(host));
+  auto ssl = socket_.native_handle();
+  if (!util::numeric_host(host.c_str())) {
+    SSL_set_tlsext_host_name(ssl, host.c_str());
+  }
 }
 
 session_tls_impl::~session_tls_impl() {}