Ticket #4806: SSH-tunneling.patch

src/engine/ftpcontrolsocket.cpp

@@ -10 +10 @@
 #include "tlssocket.h"
 #include "pathcache.h"
 #include <algorithm>
+#include <signal.h>
+#include <sys/wait.h>
 #include <wx/tokenzr.h>
 #include "local_filesys.h"
 #include <errno.h>
@@ -3807 +3809 @@
         }
     }
 
+    // Create an SSH tunnel on the port specified by the server for the passive data connection
+    int error = 0;
+    static int tunnelPID = 0;
+    if( m_pSocket->GetRemotePort(error) == 2121 ) // I use this port only for SSH tunneling
+    {
+        if ( tunnelPID )
+        {
+            kill( tunnelPID, 15 ); // SIGTERM (include signal.h)
+            waitpid( tunnelPID, &error, 0 ); // (include sys/wait.h)
+        }
+        wxString portFw = wxString::Format("%d:%s:%d", pData->port, pData->host.c_str(), pData->port);
+        if ( !( tunnelPID = fork() ) )
+            execlp("ssh", "ssh", "-L", portFw.c_str(), "myuser@myproxyserver.fr", "-N", "-n", NULL);
+        pData->host = peerIP; // Connect to localhost (SSH tunnel), not to the specified IP
+        sleep(4); // myproxyserver is somewhat slow to create the tunnel
+    }
+
     return true;
 }