--- /dev/null
+/* ovirt viewer console application
+ * Copyright (C) 2008 Red Hat Inc.
+ * Written by Mohammed Morsi <mmorsi@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* ovirt-viewer starts listening on network port to
+ * encapsulate vnc packets including the vm's name
+ * so as to be able to be proxied.
+ *
+ * This operation takes place in another thread
+ * which can be started/stopped by calling
+ * start_tunnel / stop_tunnel.
+ *
+ * An additional connection thread is created and maintained
+ * internally for each vm / vnc connection open in ovirt-viewer
+ * establishing a connection w/ the ovirt server.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <assert.h>
+#include <string.h>
+
+#include <glib.h>
+
+#include "internal.h"
+
+/* constants */
+
+// port to try to listen on, if we can't, increment until we find one we can
+const int PORT_RANGE_START = 5600;
+
+// max length of a vm name
+const int VM_NAME_MAX_LEN = 250;
+
+// max length of vnc data
+const int VNC_DATA_MAX_LEN = 800000;
+
+// port which to connect to on ovirt server
+const int OVIRT_SERVER_PORT = 5900;
+
+/* Private thread functions */
+static gpointer tunnel_thread(gpointer data);
+static gpointer client_server_thread(gpointer data);
+static gpointer server_client_thread(gpointer data);
+
+/* Other private functions */
+static void close_socket(gpointer _socket, gpointer data);
+static void wait_for_thread(gpointer _thread, gpointer data);
+
+/* tunnel and main threads */
+static GThread *tunnel_gthread = NULL;
+static GThread *main_gthread = NULL;
+
+/* list of communication threads */
+static GSList *communication_threads = NULL;
+
+/* list of sockets */
+static GSList *sockets = NULL;
+
+/* thread termination flag */
+static gboolean run_tunnel = FALSE;
+
+/* internal.h shared constructs */
+int tunnel_port;
+
+/////////////////
+
+/** public implementations **/
+
+/* start tunnel thread */
+void
+start_tunnel(void)
+{
+ GError *error = NULL;
+
+ DEBUG ("starting the tunnel thread");
+
+ assert (tunnel_gthread == NULL);
+
+ run_tunnel = TRUE;
+
+ main_gthread = g_thread_self ();
+
+ tunnel_gthread = g_thread_create (tunnel_thread, NULL, TRUE, &error);
+ if (error) {
+ g_print ("%s\n", error->message);
+ g_error_free (error);
+ exit (1);
+ }
+};
+
+/* stop tunnel thread */
+void
+stop_tunnel(void)
+{
+ if(!run_tunnel)
+ return;
+
+ DEBUG ("stopping the tunnel thread");
+
+ assert (tunnel_gthread != NULL);
+ ASSERT_IS_MAIN_THREAD ();
+
+ run_tunnel = FALSE;
+
+ g_slist_foreach(sockets, close_socket, NULL);
+
+ (void) g_thread_join (tunnel_gthread);
+ tunnel_gthread = NULL;
+};
+
+/////////////////
+
+/** private implementations **/
+
+/* the tunnel thread */
+static gpointer
+tunnel_thread (gpointer _data)
+{
+ //char vm_data[VM_NAME_MAX_LEN];
+ int local_server_socketfd, ovirt_server_socket, client_socketfd;
+ unsigned int local_server_len, client_len, ovirt_server_len;
+
+ struct sockaddr_in local_server_address;
+ struct sockaddr_in ovirt_server_address;
+ struct sockaddr_in client_address;
+
+ GThread *client_server_gthread = NULL;
+ GThread *server_client_gthread = NULL;
+
+ int sockets_param[2];
+ int * c_socket;
+
+ DEBUG ("tunnel thread starting up");
+
+ // ovirt server address
+ ovirt_server_address.sin_family = PF_INET;
+ ovirt_server_address.sin_addr.s_addr = inet_addr(hostname);
+ ovirt_server_address.sin_port = htons(OVIRT_SERVER_PORT);
+ ovirt_server_len = sizeof(ovirt_server_address);
+
+ // create local net socket
+ local_server_socketfd = socket(PF_INET, SOCK_STREAM, 0);
+ c_socket = malloc(sizeof(int)); *c_socket = local_server_socketfd;
+ sockets = g_slist_prepend(sockets, c_socket);
+
+ // local server address
+ tunnel_port = PORT_RANGE_START;
+ local_server_address.sin_family = PF_INET;
+ local_server_address.sin_addr.s_addr = inet_addr("127.0.0.1");
+ local_server_address.sin_port = htons(tunnel_port);
+ local_server_len = sizeof(local_server_address);
+
+ // increment ports until one is available
+ while(bind(local_server_socketfd, (struct sockaddr*)&local_server_address, local_server_len) < 0){
+ tunnel_port += 1;
+ local_server_address.sin_port += htons(tunnel_port);
+ }
+
+ DEBUG ("tunnel bound to local port %i", tunnel_port);
+
+ // increase client buffer size?
+ listen(local_server_socketfd, 5);
+
+ while(run_tunnel) {
+ // accept a client connection
+ DEBUG("tunnel accepting");
+ client_len = sizeof(client_address);
+ client_socketfd = accept(local_server_socketfd, (struct sockaddr*)&client_address, &client_len);
+ if(client_socketfd < 0){
+ DEBUG("tunnel accept failed");
+ break;
+ }
+ // TODO check accept return value for err
+ c_socket = malloc(sizeof(int)); *c_socket = client_socketfd;
+ sockets = g_slist_prepend(sockets, c_socket);
+
+ DEBUG ("client connected to tunnel");
+
+ // establish connection w/ ovirt server
+ ovirt_server_socket = socket(PF_INET, SOCK_STREAM, 0);
+ c_socket = malloc(sizeof(int)); *c_socket = ovirt_server_socket;
+ sockets = g_slist_prepend(sockets, c_socket);
+ DEBUG ("connecting to ovirt server %s on %i", hostname, OVIRT_SERVER_PORT);
+ if(connect(ovirt_server_socket, (struct sockaddr*)&ovirt_server_address, ovirt_server_len) < 0){
+ DEBUG ("could not connect to ovirt server");
+ break;
+ //return NULL;
+ }
+ DEBUG ("connected to ovirt server");
+
+ sockets_param[0] = ovirt_server_socket;
+ sockets_param[1] = client_socketfd;
+
+ // launch thread for client -> server traffic
+ client_server_gthread = g_thread_create (client_server_thread,
+ &sockets_param, TRUE, NULL);
+
+ // launch thread for server -> client traffic
+ server_client_gthread = g_thread_create (server_client_thread,
+ &sockets_param, TRUE, NULL);
+
+ communication_threads = g_slist_prepend(communication_threads, client_server_gthread);
+ communication_threads = g_slist_prepend(communication_threads, server_client_gthread);
+
+ // send target vm for this session
+ //strcpy(vm_data, vm_in_focus->description);
+ DEBUG ("sending vm %s", vm_in_focus->description);
+ write(ovirt_server_socket, vm_in_focus->description, strlen(vm_in_focus->description));
+
+ }
+
+ DEBUG("terminating tunnel thread");
+
+ // wait for connection threads to finish
+ g_slist_foreach(communication_threads, wait_for_thread, NULL);
+
+ DEBUG ("tunnel thread completed");
+ return NULL;
+};
+
+/* the tunnel thread */
+static gpointer
+client_server_thread (gpointer _data){
+ int nbytes;
+ char vnc_data[VNC_DATA_MAX_LEN];
+
+ int ovirt_server_socket = ((int*)_data)[0],
+ client_socket = ((int*)_data)[1];
+
+ DEBUG ("client/server thread starting up");
+
+ while(run_tunnel){
+ VERBOSE( "accepting client data");
+
+ // grab vnc data
+ nbytes = read(client_socket, vnc_data, VNC_DATA_MAX_LEN);
+ if(nbytes <= 0){
+ DEBUG ( "error reading data from client" );
+ break;
+ }
+ VERBOSE ("read %i bytes from client", nbytes);
+
+ // send network_data onto server
+ nbytes = write(ovirt_server_socket, vnc_data, nbytes);
+ if(nbytes <= 0){
+ DEBUG ( "error writing data to server" );
+ break;
+ }
+ VERBOSE ("wrote %i bytes to server", nbytes);
+ }
+
+ DEBUG ("client/server thread completed");
+ return NULL;
+};
+
+/* the server thread */
+static gpointer
+server_client_thread (gpointer _data){
+ char vnc_data[VNC_DATA_MAX_LEN];
+
+ int ovirt_server_socket = ((int*)_data)[0],
+ client_socket = ((int*)_data)[1];
+
+ int nbytes;
+
+ DEBUG ("server/client thread starting up");
+
+ while(run_tunnel){
+ // grab vnc data
+ nbytes = read(ovirt_server_socket, vnc_data, VNC_DATA_MAX_LEN);
+ if(nbytes <= 0){
+ DEBUG ( "error reading data from server" );
+ break;
+ }
+ VERBOSE ("read %i bytes from server", nbytes);
+
+ // send network_data onto client
+ nbytes = write(client_socket, vnc_data, nbytes);
+ if(nbytes <= 0){
+ DEBUG ( "error writing data to client" );
+ break;
+ }
+ VERBOSE ("wrote %i bytes to client", nbytes);
+ }
+
+ DEBUG ("server/client thread completed");
+ return NULL;
+};
+
+static void close_socket(gpointer _socket, gpointer data){
+ shutdown(*(int*) _socket, 2);
+ close(*(int*) _socket);
+ free((int*) _socket);
+};
+
+static void wait_for_thread(gpointer _thread, gpointer data){
+ g_thread_join((GThread*)_thread);
+};
git.annexia.org / ovirt-viewer.git / blobdiff