support definition of local endpoint for cleartext client session

src/asio_client_session.cc

@@ -44,6 +44,15 @@ session::session(boost::asio::io_service &io_service, const std::string &host,
   impl_->start_resolve(host, service);
 }
 
+session::session(boost::asio::io_service &io_service,
+                 const boost::asio::ip::tcp::endpoint &local_endpoint,
+                 const std::string &host, const std::string &service)
+    : impl_(std::make_shared<session_tcp_impl>(
+          io_service, local_endpoint, host, service,
+          boost::posix_time::seconds(60))) {
+  impl_->start_resolve(host, service);
+}
+
 session::session(boost::asio::io_service &io_service, const std::string &host,
                  const std::string &service,
                  const boost::posix_time::time_duration &connect_timeout)
@@ -52,6 +61,15 @@ session::session(boost::asio::io_service &io_service, const std::string &host,
   impl_->start_resolve(host, service);
 }
 
+session::session(boost::asio::io_service &io_service,
+                 const boost::asio::ip::tcp::endpoint &local_endpoint,
+                 const std::string &host, const std::string &service,
+                 const boost::posix_time::time_duration &connect_timeout)
+    : impl_(std::make_shared<session_tcp_impl>(io_service, local_endpoint, host,
+                                               service, connect_timeout)) {
+  impl_->start_resolve(host, service);
+}
+
 session::session(boost::asio::io_service &io_service,
                  boost::asio::ssl::context &tls_ctx, const std::string &host,
                  const std::string &service)

src/asio_client_session_tcp_impl.cc

@@ -34,13 +34,20 @@ session_tcp_impl::session_tcp_impl(
     const boost::posix_time::time_duration &connect_timeout)
     : session_impl(io_service, connect_timeout), socket_(io_service) {}
 
+session_tcp_impl::session_tcp_impl(
+    boost::asio::io_service &io_service,
+    const boost::asio::ip::tcp::endpoint &local_endpoint,
+    const std::string &host, const std::string &service,
+    const boost::posix_time::time_duration &connect_timeout)
+    : session_impl(io_service, connect_timeout),
+      socket_(io_service, local_endpoint) {}
+
 session_tcp_impl::~session_tcp_impl() {}
 
 void session_tcp_impl::start_connect(tcp::resolver::iterator endpoint_it) {
   auto self = shared_from_this();
-  boost::asio::async_connect(socket_, endpoint_it,
+  socket_.async_connect(
-                             [self](const boost::system::error_code &ec,
+      *endpoint_it, [self, endpoint_it](const boost::system::error_code &ec) {
-                                    tcp::resolver::iterator endpoint_it) {
         if (self->stopped()) {
           return;
         }

src/asio_client_session_tcp_impl.h

@@ -40,6 +40,10 @@ public:
   session_tcp_impl(boost::asio::io_service &io_service, const std::string &host,
                    const std::string &service,
                    const boost::posix_time::time_duration &connect_timeout);
+  session_tcp_impl(boost::asio::io_service &io_service,
+                   const boost::asio::ip::tcp::endpoint &local_endpoint,
+                   const std::string &host, const std::string &service,
+                   const boost::posix_time::time_duration &connect_timeout);
   virtual ~session_tcp_impl();
 
   virtual void start_connect(tcp::resolver::iterator endpoint_it);

src/includes/nghttp2/asio_http2_client.h

@@ -150,6 +150,11 @@ public:
   session(boost::asio::io_service &io_service, const std::string &host,
           const std::string &service);
 
+  // Same as previous but with pegged local endpoint
+  session(boost::asio::io_service &io_service,
+          const boost::asio::ip::tcp::endpoint &local_endpoint,
+          const std::string &host, const std::string &service);
+
   // Starts HTTP/2 session by connecting to |host| and |service|
   // (e.g., "80") using clear text TCP connection with given connect
   // timeout.
@@ -157,6 +162,12 @@ public:
           const std::string &service,
           const boost::posix_time::time_duration &connect_timeout);
 
+  // Same as previous but with pegged local endpoint
+  session(boost::asio::io_service &io_service,
+          const boost::asio::ip::tcp::endpoint &local_endpoint,
+          const std::string &host, const std::string &service,
+          const boost::posix_time::time_duration &connect_timeout);
+
   // Starts HTTP/2 session by connecting to |host| and |service|
   // (e.g., "443") using encrypted SSL/TLS connection with connect
   // timeout 60 seconds.