Connect to Wi-Fi C++

Question

I searched everywhere... I did! I just couldn't find any example on how to connect to a Wi-Fi on C++.

I found and tried the examples of WlanGetAvailableNetworkList() and WlanQueryInterface() on MSDN. I also found an example of what I'm searching for on C#. Could any one tell me one for C++?

Edit: I know nothing about the internet part of C++ (servers, Wifi APIs even not much of Win32 APIs), just the core of the language, I just want to make a simple program that finds an open connection and automatically connects to it and plays a sound if the connection was successful. If you can provide me with some info and links I'll do a research and post any solution I can find.

Answer 1

Given code is not advance type i.e. not that good but it does the work. I have use codeblock in windows.

#include <iostream>
#include<stdlib.h>
#include<fstream>
#include<string>
#include<conio.h>

using namespace std;

int main()
{
ofstream xmlFile;
ifstream xmlFile1;

string name="",pass="";
string ntyp="Wi-Fi",netType,fileTest=">test.txt",check,ntype,fil,xfileName,fileName="myWlan.xml";
char c='"',cho='2',cho1='1',c1;
netType=c+ntyp+c+fileTest;
xfileName=c+fileName+c;
int succ=0;

 do
 {
      system("netsh wlan show networks");
      cout<<"   >--------------------         TO REFRESS PRESS :1       \n\n   >--------------------         TO CHOOSE NETWORK PRESS : 2              \n\n   >   ";
      cho=getch();
}while(cho!='2');

cout<<"\n    Enter the desired network name-------:       ";
cin>>name;
do
{
   cout<<"\n    Enter wifi Password------:        ";
    cin>>pass;
    xmlFile.open(fileName.c_str());

    //Writing a xml file .....................

    xmlFile<<"<?xml version="<<c<<"1.0"<<c<<"?>\n";
    xmlFile<<"<WLANProfile xmlns="<<c<<"http://www.microsoft.com/networking/WLAN/profile/v1"<<c<<">\n";
    xmlFile<<"<name>";
    xmlFile<<name;
    xmlFile<<"</name>\n<SSIDConfig>\n<SSID>\n<hex>";
    for(int i=0;i<name.length();i++)
    xmlFile<<hex<<(int)name.at(i);
    xmlFile<<"</hex>\n<name>";
    xmlFile<<name;
    xmlFile<<"</name>\n</SSID>\n</SSIDConfig>\n<connectionType>ESS</connectionType>\n<connectionMode>auto</connectionMode>\n<MSM>\n<security>\n<authEncryption>";
    xmlFile<<"\n<authentication>WPA2PSK</authentication>\n<encryption>AES</encryption>\n<useOneX>false</useOneX>\n</authEncryption>\n<sharedKey>";
    xmlFile<<"\n<keyType>passPhrase</keyType>\n<protected>false</protected>\n<keyMaterial>";
    xmlFile<<pass;
    xmlFile<<"</keyMaterial>\n</sharedKey>\n</security>\n</MSM>\n";
    xmlFile<<"<MacRandomization xmlns="<<c<<"http://www.microsoft.com/networking/WLAN/profile/v3"<<c<<">\n";
    xmlFile<<"<enableRandomization>false</enableRandomization>\n</MacRandomization>\n</WLANProfile>";
    xmlFile.close();

    //addd the xml file to system profile.............
    system(("netsh wlan add profile filename="+xfileName).c_str());
    //to let system realize what changes have been made...............
    system("timeout /t 2");
    //to check if connected...........
    system(("netsh interface show interface name="+netType).c_str());

    xmlFile1.open("test.txt");
    while(!xmlFile1.eof())
    {
         xmlFile1>>c1;
         if(c1==':')
         {
              for(int i=0;i<9;i++)
              {
                   xmlFile1>>c1;
                   check=check+c1;
               }
         }
              if(check=="Connected")
              {
                  cout<<"...............................................You are connected!!.................................";
                  succ=1;break;
              }
              if(check!="Connected")check="";



    }
    xmlFile1.close();
    if(succ==1)break;
  }while(succ!=1);
return 0;
}

HOPE IT HELPS ....

Answer 2

Okay, I guess you're looking for an enumeration function such as this one:

http://msdn.microsoft.com/en-us/library/windows/desktop/ms706716%28v=vs.85%29.aspx

I guess what you mean is to check whether the WLan state is up. If you look closely the enumeration function returns a structure that includes isState which is one of those:

typedef enum _WLAN_INTERFACE_STATE { 
  wlan_interface_state_not_ready              = 0,
  wlan_interface_state_connected              = 1,
  wlan_interface_state_ad_hoc_network_formed  = 2,
  wlan_interface_state_disconnecting          = 3,
  wlan_interface_state_disconnected           = 4,
  wlan_interface_state_associating            = 5,
  wlan_interface_state_discovering            = 6,
  wlan_interface_state_authenticating         = 7
} WLAN_INTERFACE_STATE, *PWLAN_INTERFACE_STATE;

To actually "connect" you need to have a server listening on the other side... Although Renan gave you a good link too (see comment section of question) but that requires you to have an SSID. It depends whether your software would indeed know the Wifi SSIDs.