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(Unicode C) SSH Tunnel with Dynamic Port ForwardingDemonstrates how to start a background thread that runs a portable SSH tunnel w/ dynamic port forwarding that the foreground thread can use for establishing connections through an SSH tunnel.
#include <C_CkGlobalW.h> #include <C_CkSshTunnelW.h> #include <C_CkHttpW.h> void ChilkatSample(void) { HCkGlobalW chilkatGlob; BOOL success; HCkSshTunnelW tunnel; const wchar_t *sshHostname; int sshPort; const wchar_t *url; HCkHttpW http; const wchar_t *html; BOOL waitForThreadExit; // Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program // by calling UnlockBundle. It requires a Bundle unlock code. chilkatGlob = CkGlobalW_Create(); success = CkGlobalW_UnlockBundle(chilkatGlob,L"Anything for 30-day trial."); if (success != TRUE) { wprintf(L"%s\n",CkGlobalW_lastErrorText(chilkatGlob)); CkGlobalW_Dispose(chilkatGlob); return; } // This example requires Chilkat version 9.5.0.50 or greater. tunnel = CkSshTunnelW_Create(); sshHostname = L"sftp.example.com"; sshPort = 22; // Connect to an SSH server and establish the SSH tunnel: success = CkSshTunnelW_Connect(tunnel,sshHostname,sshPort); if (success != TRUE) { wprintf(L"%s\n",CkSshTunnelW_lastErrorText(tunnel)); CkGlobalW_Dispose(chilkatGlob); CkSshTunnelW_Dispose(tunnel); return; } // Authenticate with the SSH server via a login/password // or with a public key. // This example demonstrates SSH password authentication. success = CkSshTunnelW_AuthenticatePw(tunnel,L"mySshLogin",L"mySshPassword"); if (success != TRUE) { wprintf(L"%s\n",CkSshTunnelW_lastErrorText(tunnel)); CkGlobalW_Dispose(chilkatGlob); CkSshTunnelW_Dispose(tunnel); return; } // Indicate that the background SSH tunnel thread will behave as a SOCKS proxy server // with dynamic port forwarding: CkSshTunnelW_putDynamicPortForwarding(tunnel,TRUE); // We may optionally require that connecting clients authenticate with our SOCKS proxy server. // To do this, set an inbound username/password. Any connecting clients would be required to // use SOCKS5 with the correct username/password. // If no inbound username/password is set, then our SOCKS proxy server will accept both // SOCKS4 and SOCKS5 unauthenticated connections. CkSshTunnelW_putInboundSocksUsername(tunnel,L"chilkat123"); CkSshTunnelW_putInboundSocksPassword(tunnel,L"password123"); // Start the listen/accept thread to begin accepting SOCKS proxy client connections. // Listen on port 1080. success = CkSshTunnelW_BeginAccepting(tunnel,1080); if (success != TRUE) { wprintf(L"%s\n",CkSshTunnelW_lastErrorText(tunnel)); CkGlobalW_Dispose(chilkatGlob); CkSshTunnelW_Dispose(tunnel); return; } // Now that a background thread is running a SOCKS proxy server that forwards connections // through an SSH tunnel, it is possible to use any Chilkat implemented protocol that is SOCKS capable, // such as HTTP, POP3, SMTP, IMAP, FTP, etc. The protocol may use SSL/TLS because the SSL/TLS // will be passed through the SSH tunnel to the end-destination. Also, any number of simultaneous // connections may be routed through the SSH tunnel. // For this example, let's do a simple HTTPS request: url = L"https://www.ethereum.org/"; http = CkHttpW_Create(); // Indicate that the HTTP object is to use our portable SOCKS proxy/SSH tunnel running in our background thread. CkHttpW_putSocksHostname(http,L"localhost"); CkHttpW_putSocksPort(http,1080); CkHttpW_putSocksVersion(http,5); CkHttpW_putSocksUsername(http,L"chilkat123"); CkHttpW_putSocksPassword(http,L"password123"); CkHttpW_putSendCookies(http,TRUE); CkHttpW_putSaveCookies(http,TRUE); CkHttpW_putCookieDir(http,L"memory"); // Do the HTTPS page fetch (through the SSH tunnel) html = CkHttpW_quickGetStr(http,url); if (CkHttpW_getLastMethodSuccess(http) != TRUE) { wprintf(L"%s\n",CkHttpW_lastErrorText(http)); CkGlobalW_Dispose(chilkatGlob); CkSshTunnelW_Dispose(tunnel); CkHttpW_Dispose(http); return; } // Stop the background listen/accept thread: waitForThreadExit = TRUE; success = CkSshTunnelW_StopAccepting(tunnel,waitForThreadExit); if (success != TRUE) { wprintf(L"%s\n",CkSshTunnelW_lastErrorText(tunnel)); CkGlobalW_Dispose(chilkatGlob); CkSshTunnelW_Dispose(tunnel); CkHttpW_Dispose(http); return; } // Close the SSH tunnel (would also kick any remaining connected clients). success = CkSshTunnelW_CloseTunnel(tunnel,waitForThreadExit); if (success != TRUE) { wprintf(L"%s\n",CkSshTunnelW_lastErrorText(tunnel)); CkGlobalW_Dispose(chilkatGlob); CkSshTunnelW_Dispose(tunnel); CkHttpW_Dispose(http); return; } CkGlobalW_Dispose(chilkatGlob); CkSshTunnelW_Dispose(tunnel); CkHttpW_Dispose(http); } |
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