faudit network

1 files changed, 52 insertions, 0 deletions

diff --git a/src/faudit/network.c b/src/faudit/network.c
new file mode 100644
index 000000000..697b1d1fb
--- /dev/null
+++ b/src/faudit/network.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2014-2016 Firejail Authors
+ *
+ * This file is part of firejail project
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+#include "faudit.h"
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+void check_ssh(void) {
+        printf("INFO: looking for ssh servers running on localhost\n");
+        
+        // open socket
+        int sock = socket(AF_INET, SOCK_STREAM, 0);
+        if (sock == -1) {
+                printf("Error: cannot create an IPv4 socket\n");
+                return;
+        }
+
+        // connect to localhost
+        struct sockaddr_in server;
+        server.sin_addr.s_addr = inet_addr("127.0.0.1");
+        server.sin_family = AF_INET;
+        server.sin_port = htons(22);    
+        
+        if (connect(sock , (struct sockaddr *)&server , sizeof(server)) < 0)
+                printf("GOOD: SSH server not available on localhost\n");
+        else {
+                printf("MAYBE: an SSH server is accessible on localhost\n");
+                printf("It could be a good idea to create a new network namespace using \"--net=none\" or \"--net=eth0\".\n");
+        }
+        
+        close(sock);
+}
+        
+void network_test(void) {
+        check_ssh();
+}