1 /* ovirt viewer console application
2 * Copyright (C) 2008 Red Hat Inc.
3 * Written by Mohammed Morsi <mmorsi@redhat.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /* ovirt-viewer starts listening on network port to
21 * encapsulate vnc packets including the vm's name
22 * so as to be able to be proxied.
24 * This operation takes place in another thread
25 * which can be started/stopped by calling
26 * start_tunnel / stop_tunnel.
28 * An additional connection thread is created and maintained
29 * internally for each vm / vnc connection open in ovirt-viewer
30 * establishing a connection w/ the ovirt server.
33 #include <sys/types.h>
34 #include <sys/socket.h>
38 #include <netinet/in.h>
39 #include <arpa/inet.h>
50 // max length of a vm name
51 const int VM_NAME_MAX_LEN = 250;
53 // max length of vnc data
54 const int VNC_DATA_MAX_LEN = 800000;
56 /* Private thread functions */
57 static gpointer tunnel_thread(gpointer data);
58 static gpointer client_server_thread(gpointer data);
59 static gpointer server_client_thread(gpointer data);
61 /* Other private functions */
62 static void close_socket(gpointer _socket, gpointer data);
63 static void wait_for_thread(gpointer _thread, gpointer data);
65 /* tunnel and main threads */
66 static GThread *tunnel_gthread = NULL;
67 static GThread *main_gthread = NULL;
69 /* list of communication threads */
70 static GSList *communication_threads = NULL;
73 static GSList *sockets = NULL;
75 /* thread termination flag */
76 static gboolean run_tunnel = FALSE;
78 /* internal.h shared constructs */
83 /** public implementations **/
85 /* start tunnel thread */
91 DEBUG ("starting the tunnel thread");
93 assert (tunnel_gthread == NULL);
97 main_gthread = g_thread_self ();
99 tunnel_gthread = g_thread_create (tunnel_thread, NULL, TRUE, &error);
101 g_print ("%s\n", error->message);
102 g_error_free (error);
107 /* stop tunnel thread */
114 DEBUG ("stopping the tunnel thread");
116 assert (tunnel_gthread != NULL);
117 ASSERT_IS_MAIN_THREAD ();
121 g_slist_foreach(sockets, close_socket, NULL);
123 (void) g_thread_join (tunnel_gthread);
124 tunnel_gthread = NULL;
129 /** private implementations **/
131 /* the tunnel thread */
133 tunnel_thread (gpointer _data)
135 struct hostent *dns_serv;
137 //char vm_data[VM_NAME_MAX_LEN];
138 int local_server_socketfd, ovirt_server_socket, client_socketfd;
139 unsigned int local_server_len, client_len, ovirt_server_len;
141 struct sockaddr_in local_server_address;
142 struct sockaddr_in ovirt_server_address;
143 struct sockaddr_in client_address;
145 struct sockaddr_in local_server_address_lookup;
146 unsigned int local_server_address_lookup_len = sizeof(local_server_address_lookup);
148 GThread *client_server_gthread = NULL;
149 GThread *server_client_gthread = NULL;
151 int sockets_param[2];
154 DEBUG ("tunnel thread starting up");
156 // ovirt server address
157 dns_serv = gethostbyname(hostname);
158 if(dns_serv == NULL){
159 DEBUG("ovirt server lookup failed");
162 ovirt_server_address.sin_family = PF_INET;
163 ovirt_server_address.sin_addr.s_addr = ((struct in_addr*)(dns_serv->h_addr))->s_addr; //inet_addr(hostname);
164 ovirt_server_address.sin_port = htons(ovirt_server_vnc_port);
165 ovirt_server_len = sizeof(ovirt_server_address);
167 // create local net socket
168 local_server_socketfd = socket(PF_INET, SOCK_STREAM, 0);
169 c_socket = malloc(sizeof(int)); *c_socket = local_server_socketfd;
170 sockets = g_slist_prepend(sockets, c_socket);
172 // local server address
173 local_server_address.sin_family = PF_INET;
174 local_server_address.sin_addr.s_addr = inet_addr("127.0.0.1");
175 local_server_address.sin_port = 0;
176 local_server_len = sizeof(local_server_address);
178 // increment ports until one is available
179 if(bind(local_server_socketfd, (struct sockaddr*)&local_server_address, local_server_len) < 0){
180 DEBUG("tunnel bind failed");
184 getsockname(local_server_socketfd,
185 (struct sockaddr*) &local_server_address_lookup,
186 &local_server_address_lookup_len);
187 tunnel_port = (int)ntohs(local_server_address_lookup.sin_port);
188 DEBUG ("tunnel bound to local port %i", tunnel_port);
190 // increase client buffer size?
191 listen(local_server_socketfd, 5);
194 // accept a client connection
195 DEBUG("tunnel accepting");
196 client_len = sizeof(client_address);
197 client_socketfd = accept(local_server_socketfd, (struct sockaddr*)&client_address, &client_len);
198 if(client_socketfd < 0){
199 DEBUG("tunnel accept failed");
202 // TODO check accept return value for err
203 c_socket = malloc(sizeof(int)); *c_socket = client_socketfd;
204 sockets = g_slist_prepend(sockets, c_socket);
206 DEBUG ("client connected to tunnel");
208 // establish connection w/ ovirt server
209 ovirt_server_socket = socket(PF_INET, SOCK_STREAM, 0);
210 c_socket = malloc(sizeof(int)); *c_socket = ovirt_server_socket;
211 sockets = g_slist_prepend(sockets, c_socket);
212 DEBUG ("connecting to ovirt server %s on %i", hostname, ovirt_server_vnc_port);
213 if(connect(ovirt_server_socket, (struct sockaddr*)&ovirt_server_address, ovirt_server_len) < 0){
214 DEBUG ("could not connect to ovirt server");
218 DEBUG ("connected to ovirt server");
220 sockets_param[0] = ovirt_server_socket;
221 sockets_param[1] = client_socketfd;
223 // launch thread for client -> server traffic
224 client_server_gthread = g_thread_create (client_server_thread,
225 &sockets_param, TRUE, NULL);
227 // launch thread for server -> client traffic
228 server_client_gthread = g_thread_create (server_client_thread,
229 &sockets_param, TRUE, NULL);
231 communication_threads = g_slist_prepend(communication_threads, client_server_gthread);
232 communication_threads = g_slist_prepend(communication_threads, server_client_gthread);
234 // send target vm for this session
235 //strcpy(vm_data, vm_in_focus->description);
236 DEBUG ("sending vm %s", vm_in_focus->description);
237 write(ovirt_server_socket, vm_in_focus->description, strlen(vm_in_focus->description));
241 DEBUG("terminating tunnel thread");
243 // wait for connection threads to finish
244 g_slist_foreach(communication_threads, wait_for_thread, NULL);
246 DEBUG ("tunnel thread completed");
250 /* the tunnel thread */
252 client_server_thread (gpointer _data){
254 char vnc_data[VNC_DATA_MAX_LEN];
256 int ovirt_server_socket = ((int*)_data)[0],
257 client_socket = ((int*)_data)[1];
259 DEBUG ("client/server thread starting up");
262 VERBOSE( "accepting client data");
265 nbytes = read(client_socket, vnc_data, VNC_DATA_MAX_LEN);
267 DEBUG ( "error reading data from client" );
270 VERBOSE ("read %i bytes from client", nbytes);
272 // send network_data onto server
273 nbytes = write(ovirt_server_socket, vnc_data, nbytes);
275 DEBUG ( "error writing data to server" );
278 VERBOSE ("wrote %i bytes to server", nbytes);
281 DEBUG ("client/server thread completed");
285 /* the server thread */
287 server_client_thread (gpointer _data){
288 char vnc_data[VNC_DATA_MAX_LEN];
290 int ovirt_server_socket = ((int*)_data)[0],
291 client_socket = ((int*)_data)[1];
295 DEBUG ("server/client thread starting up");
299 nbytes = read(ovirt_server_socket, vnc_data, VNC_DATA_MAX_LEN);
301 DEBUG ( "error reading data from server" );
304 VERBOSE ("read %i bytes from server", nbytes);
306 // send network_data onto client
307 nbytes = write(client_socket, vnc_data, nbytes);
309 DEBUG ( "error writing data to client" );
312 VERBOSE ("wrote %i bytes to client", nbytes);
315 DEBUG ("server/client thread completed");
319 static void close_socket(gpointer _socket, gpointer data){
320 shutdown(*(int*) _socket, 2);
321 close(*(int*) _socket);
322 free((int*) _socket);
325 static void wait_for_thread(gpointer _thread, gpointer data){
326 g_thread_join((GThread*)_thread);