source/comm/functions.cpp

   1 // ANNA - Anna is Not Nothingness Anymore                                                         //
   2 //                                                                                                //
   3 // (c) Copyright 2005-2015 Eduardo Ramos Testillano & Francisco Ruiz Rayo                         //
   4 //                                                                                                //
   5 // See project site at http://redmine.teslayout.com/projects/anna-suite                           //
   6 // See accompanying file LICENSE or copy at http://www.teslayout.com/projects/public/anna.LICENSE //
   7
   8
   9 #include <unistd.h>
  10 #include <netdb.h>
  11
  12 #ifndef MAXHOSTNAMELEN
  13 #define MAXHOSTNAMELEN 64
  14 #pragma Definiendo MAXHOSTNAMELEN
  15 #endif
  16
  17 #include <anna/comm/functions.hpp>
  18 #include <anna/comm/Application.hpp>
  19 #include <anna/comm/Communicator.hpp>
  20 #include <anna/comm/Service.hpp>
  21 #include <anna/comm/Server.hpp>
  22 #include <anna/core/tracing/Logger.hpp>
  23
  24 using namespace std;
  25 using namespace anna;
  26
  27 comm::Application& comm::functions::getApp()
  28 noexcept(false) {
  29   if(comm::Application::st_application == NULL)
  30     throw RuntimeException("No Application class has been defined", ANNA_FILE_LOCATION);
  31
  32   if(comm::Application::st_application->supportCommunication() == false)
  33     throw RuntimeException("Defined Application class has no communications support. Must inherit from anna::comm::Application or superior", ANNA_FILE_LOCATION);
  34
  35   return *(static_cast <comm::Application*>(comm::Application::st_application));
  36 }
  37
  38 string comm::functions::getHostName()
  39 noexcept(false) {
  40   char hostName [MAXHOSTNAMELEN];
  41
  42   if(gethostname(hostName, MAXHOSTNAMELEN) != 0)
  43     throw RuntimeException("Cannot obtain the hostname", errno, ANNA_FILE_LOCATION);
  44
  45   return string(hostName);
  46 }
  47
  48
  49
  50
  51 std::string comm::functions::resolveIP(const char* hostname)
  52 noexcept(false) {
  53   std::string result;
  54   struct hostent *host;
  55
  56   if((host = gethostbyname(hostname)) == NULL) {
  57     string msg("comm::functions::resolveIP | Host to resolve: ");
  58     msg += hostname;
  59     msg += " | ";
  60     msg += hstrerror(h_errno);
  61     throw RuntimeException(msg, ANNA_FILE_LOCATION);
  62   }
  63
  64   if(host->h_addrtype != AF_INET) {
  65     string msg("comm::functions::resolveIP | Host to resolve: ");
  66     msg += hostname;
  67     msg += " | Address type unsupported";
  68     throw RuntimeException(msg, ANNA_FILE_LOCATION);
  69   }
  70
  71   LOGDEBUG(
  72     string msg("comm::functions::resolveIP | Host to resolve: ");
  73     msg += hostname;
  74
  75   if(host->h_name != NULL) { msg += " | Official name: "; msg += host->h_name; }
  76 if(host->h_aliases[0] != NULL) {
  77   msg += " | Aliases:";
  78
  79   for(int i = 0; host->h_aliases[i] != NULL; i ++) { msg += " "; msg += host->h_aliases[i]; }
  80   }
  81   msg += " | Address type: ";
  82   msg += functions::asString(host->h_addrtype);
  83   msg += " | Address length: ";
  84   msg += functions::asString(host->h_length);
  85
  86   if(host->h_addr_list[0] != NULL) {
  87   msg += " | IPs:";
  88
  89   for(int i = 0; host->h_addr_list[i] != NULL; i ++) { msg += " "; msg += inet_ntoa(*reinterpret_cast <in_addr*>(host->h_addr_list[i])); }
  90   }
  91   Logger::debug(msg, ANNA_FILE_LOCATION);
  92   );
  93
  94   if(host->h_addr_list[0] == NULL) {
  95     string msg("comm::functions::resolveIP | Host to resolve: ");
  96     msg += hostname;
  97     msg += " | Address not resolved by the system";
  98     throw RuntimeException(msg, ANNA_FILE_LOCATION);
  99   }
 100
 101   // Assignment:
 102   result = inet_ntoa(*reinterpret_cast <in_addr*>(host->h_addr_list[0]));   // inet_ntoa (const in_addr_t& address)
 103   return result;
 104 }
 105