Be verbose about IRC server connection failures, and handle them properly

src/irc/irc_client.cpp

@@ -27,7 +27,12 @@ IrcClient::~IrcClient()
 
 void IrcClient::start()
 {
-  this->connect(this->hostname, "6667");
+  this->bridge->send_xmpp_message(this->hostname, "", std::string("Connecting to ") +
+                                  this->hostname + ":" + "6667");
+  std::pair<bool, std::string> res = this->connect(this->hostname, "6667");
+  if (!res.first)
+    this->bridge->send_xmpp_message(this->hostname, "",
+                                    std::string("Connection failed: ") + res.second);
 }
 
 void IrcClient::on_connected()

src/network/socket_handler.cpp

@@ -23,7 +23,7 @@ SocketHandler::SocketHandler():
     throw std::runtime_error("Could not create socket");
 }
 
-bool SocketHandler::connect(const std::string& address, const std::string& port)
+std::pair<bool, std::string> SocketHandler::connect(const std::string& address, const std::string& port)
 {
   log_info("Trying to connect to " << address << ":" << port);
   struct addrinfo hints;
@@ -35,15 +35,18 @@ bool SocketHandler::connect(const std::string& address, const std::string& port)
 
   struct addrinfo* addr_res;
   const int res = ::getaddrinfo(address.c_str(), port.c_str(), &hints, &addr_res);
+
+  if (res != 0)
+    {
+      log_warning(std::string("getaddrinfo failed: ") + gai_strerror(res));
+      this->close();
+      return std::make_pair(false, gai_strerror(res));
+    }
+
   // Make sure the alloced structure is always freed at the end of the
   // function
   utils::ScopeGuard sg([&addr_res](){ freeaddrinfo(addr_res); });
 
-  if (res != 0)
-    {
-      perror("getaddrinfo");
-      throw std::runtime_error("getaddrinfo failed");
-    }
   for (struct addrinfo* rp = addr_res; rp; rp = rp->ai_next)
     {
       if (::connect(this->socket, rp->ai_addr, rp->ai_addrlen) == 0)
@@ -51,14 +54,14 @@ bool SocketHandler::connect(const std::string& address, const std::string& port)
           log_info("Connection success.");
           this->connected = true;
           this->on_connected();
-          return true;
+          return std::make_pair(true, "");
         }
       log_info("Connection failed:");
       perror("connect");
     }
   log_error("All connection attempts failed.");
   this->close();
-  return false;
+  return std::make_pair(false, "");
 }
 
 void SocketHandler::set_poller(Poller* poller)

src/network/socket_handler.hpp

@@ -2,6 +2,7 @@
 # define SOCKET_HANDLER_INCLUDED
 
 #include <string>
+#include <utility>
 
 typedef int socket_t;
 
@@ -21,7 +22,7 @@ public:
   /**
    * Connect to the remote server, and call on_connected() if this succeeds
    */
-  bool connect(const std::string& address, const std::string& port);
+  std::pair<bool, std::string> connect(const std::string& address, const std::string& port);
   /**
    * Set the pointer to the given Poller, to communicate with it.
    */

src/xmpp/xmpp_component.cpp

@@ -49,7 +49,7 @@ XmppComponent::~XmppComponent()
 
 bool XmppComponent::start()
 {
-  return this->connect("127.0.0.1", "5347");
+  return this->connect("127.0.0.1", "5347").first;
 }
 
 bool XmppComponent::is_document_open() const