- use tunnel encryption state to select decryption key

[oweals/gnunet.git] / src / nat / gnunet-helper-nat-client-windows.c

diff --git a/src/nat/gnunet-helper-nat-client-windows.c b/src/nat/gnunet-helper-nat-client-windows.c
index 0fa62ff7c5092a21a32913aa9ccf9b098450ea1f..b949374f3445bb6b7026de3f0a6b9db71c70c01b 100644 (file)
--- a/src/nat/gnunet-helper-nat-client-windows.c
+++ b/src/nat/gnunet-helper-nat-client-windows.c
@@ -43,6 +43,7 @@
  */
 #define _GNU_SOURCE
 
+#define FD_SETSIZE 1024
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <sys/time.h>
@@ -166,6 +167,10 @@ struct udp_header
   uint16_t crc;
 };
 
+/**
+ * Will this binary be run in permissions testing mode?
+ */
+static boolean privilege_testing = FALSE;
 
 /**
  * Socket we use to send our ICMP packets.
@@ -258,8 +263,8 @@ send_icmp_udp (const struct in_addr *my_ip, const struct in_addr *other)
   ip_pkt.checksum = 0;
   ip_pkt.src_ip = my_ip->s_addr;
   ip_pkt.dst_ip = other->s_addr;
-  ip_pkt.checksum = htons (calc_checksum ((uint16_t *) & ip_pkt,
-                                          sizeof (struct ip_header)));
+  ip_pkt.checksum =
+      htons (calc_checksum ((uint16_t *) & ip_pkt, sizeof (struct ip_header)));
   memcpy (&packet[off], &ip_pkt, sizeof (struct ip_header));
   off += sizeof (struct ip_header);
 
@@ -273,8 +278,8 @@ send_icmp_udp (const struct in_addr *my_ip, const struct in_addr *other)
   /* ip header of the presumably 'lost' udp packet */
   ip_pkt.vers_ihl = 0x45;
   ip_pkt.tos = 0;
-  ip_pkt.pkt_len = htons (sizeof (struct ip_header) +
-                          sizeof (struct udp_header));
+  ip_pkt.pkt_len =
+      htons (sizeof (struct ip_header) + sizeof (struct udp_header));
   ip_pkt.id = htons (0);
   ip_pkt.flags_frag_offset = 0;
   ip_pkt.ttl = 128;
@@ -282,8 +287,8 @@ send_icmp_udp (const struct in_addr *my_ip, const struct in_addr *other)
   ip_pkt.checksum = 0;
   ip_pkt.src_ip = other->s_addr;
   ip_pkt.dst_ip = dummy.s_addr;
-  ip_pkt.checksum = htons (calc_checksum ((uint16_t *) & ip_pkt,
-                                          sizeof (struct ip_header)));
+  ip_pkt.checksum =
+      htons (calc_checksum ((uint16_t *) & ip_pkt, sizeof (struct ip_header)));
   memcpy (&packet[off], &ip_pkt, sizeof (struct ip_header));
   off += sizeof (struct ip_header);
 
@@ -296,20 +301,20 @@ send_icmp_udp (const struct in_addr *my_ip, const struct in_addr *other)
   off += sizeof (struct udp_header);
 
   /* no go back to calculate ICMP packet checksum */
-  icmp_pkt.checksum = htons (calc_checksum ((uint16_t *) & packet[off],
-                                            sizeof (struct
-                                                    icmp_ttl_exceeded_header) +
-                                            sizeof (struct ip_header) +
-                                            sizeof (struct udp_header)));
+  icmp_pkt.checksum =
+      htons (calc_checksum
+             ((uint16_t *) & packet[off],
+              sizeof (struct icmp_ttl_exceeded_header) +
+              sizeof (struct ip_header) + sizeof (struct udp_header)));
   memcpy (&packet[sizeof (struct ip_header)], &icmp_pkt,
           sizeof (struct icmp_ttl_exceeded_header));
 
   memset (&dst, 0, sizeof (dst));
   dst.sin_family = AF_INET;
   dst.sin_addr = *other;
-  err = sendto (rawsock,
-                packet,
-                sizeof (packet), 0, (struct sockaddr *) &dst, sizeof (dst));
+  err =
+      sendto (rawsock, packet, sizeof (packet), 0, (struct sockaddr *) &dst,
+              sizeof (dst));
   if (err < 0)
   {
     fprintf (stderr, "sendto failed: %s\n", strerror (errno));
@@ -352,8 +357,8 @@ send_icmp (const struct in_addr *my_ip, const struct in_addr *other)
   ip_pkt.checksum = 0;
   ip_pkt.src_ip = my_ip->s_addr;
   ip_pkt.dst_ip = other->s_addr;
-  ip_pkt.checksum = htons (calc_checksum ((uint16_t *) & ip_pkt,
-                                          sizeof (struct ip_header)));
+  ip_pkt.checksum =
+      htons (calc_checksum ((uint16_t *) & ip_pkt, sizeof (struct ip_header)));
   memcpy (&packet[off], &ip_pkt, sizeof (struct ip_header));
   off += sizeof (ip_pkt);
 
@@ -377,8 +382,8 @@ send_icmp (const struct in_addr *my_ip, const struct in_addr *other)
   ip_pkt.src_ip = other->s_addr;
   ip_pkt.dst_ip = dummy.s_addr;
   ip_pkt.checksum = 0;
-  ip_pkt.checksum = htons (calc_checksum ((uint16_t *) & ip_pkt,
-                                          sizeof (struct ip_header)));
+  ip_pkt.checksum =
+      htons (calc_checksum ((uint16_t *) & ip_pkt, sizeof (struct ip_header)));
   memcpy (&packet[off], &ip_pkt, sizeof (struct ip_header));
   off += sizeof (struct ip_header);
 
@@ -386,26 +391,27 @@ send_icmp (const struct in_addr *my_ip, const struct in_addr *other)
   icmp_echo.code = 0;
   icmp_echo.reserved = htonl (port);
   icmp_echo.checksum = 0;
-  icmp_echo.checksum = htons (calc_checksum ((uint16_t *) & icmp_echo,
-                                             sizeof (struct icmp_echo_header)));
+  icmp_echo.checksum =
+      htons (calc_checksum
+             ((uint16_t *) & icmp_echo, sizeof (struct icmp_echo_header)));
   memcpy (&packet[off], &icmp_echo, sizeof (struct icmp_echo_header));
 
   /* no go back to calculate ICMP packet checksum */
   off = sizeof (struct ip_header);
-  icmp_ttl.checksum = htons (calc_checksum ((uint16_t *) & packet[off],
-                                            sizeof (struct
-                                                    icmp_ttl_exceeded_header) +
-                                            sizeof (struct ip_header) +
-                                            sizeof (struct icmp_echo_header)));
+  icmp_ttl.checksum =
+      htons (calc_checksum
+             ((uint16_t *) & packet[off],
+              sizeof (struct icmp_ttl_exceeded_header) +
+              sizeof (struct ip_header) + sizeof (struct icmp_echo_header)));
   memcpy (&packet[off], &icmp_ttl, sizeof (struct icmp_ttl_exceeded_header));
 
   memset (&dst, 0, sizeof (dst));
   dst.sin_family = AF_INET;
   dst.sin_addr = *other;
 
-  err = sendto (rawsock,
-                packet,
-                sizeof (packet), 0, (struct sockaddr *) &dst, sizeof (dst));
+  err =
+      sendto (rawsock, packet, sizeof (packet), 0, (struct sockaddr *) &dst,
+              sizeof (dst));
 
   if (err < 0)
   {
@@ -439,8 +445,8 @@ make_raw_socket ()
   if (0 !=
       setsockopt (ret, SOL_SOCKET, SO_BROADCAST, (char *) &bOptVal, bOptLen))
   {
-    fprintf (stderr,
-             "Error setting SO_BROADCAST to ON: %s\n", strerror (errno));
+    fprintf (stderr, "Error setting SO_BROADCAST to ON: %s\n",
+             strerror (errno));
     closesocket (rawsock);
     return INVALID_SOCKET;
   }
@@ -461,42 +467,61 @@ main (int argc, char *const *argv)
   struct in_addr external;
   struct in_addr target;
   WSADATA wsaData;
-
   unsigned int p;
 
+  if (argc > 1 && 0 != strcmp (argv[1], "-d")){
+      privilege_testing = TRUE;
+      fprintf (stderr,
+              "%s",
+              "DEBUG: Running binary in privilege testing mode.");
+      argv++;
+      argc--;
+    }
+
   if (argc != 4)
   {
     fprintf (stderr,
-             "This program must be started with our IP, the targets external IP, and our port as arguments.\n");
+             "%s",
+            "This program must be started with our IP, the targets external IP, and our port as arguments.\n");
     return 1;
   }
   if ((1 != inet_pton (AF_INET, argv[1], &external)) ||
       (1 != inet_pton (AF_INET, argv[2], &target)))
   {
-    fprintf (stderr, "Error parsing IPv4 address: %s\n", strerror (errno));
+    fprintf (stderr,
+            "Error parsing IPv4 address: %s\n",
+            strerror (errno));
     return 1;
   }
   if ((1 != sscanf (argv[3], "%u", &p)) || (0 == p) || (0xFFFF < p))
   {
-    fprintf (stderr, "Error parsing port value `%s'\n", argv[3]);
+    fprintf (stderr,
+            "Error parsing port value `%s'\n",
+            argv[3]);
     return 1;
   }
   port = (uint16_t) p;
 
   if (0 != WSAStartup (MAKEWORD (2, 1), &wsaData))
   {
-    fprintf (stderr, "Failed to find Winsock 2.1 or better.\n");
+    fprintf (stderr,
+            "%s",
+            "Failed to find Winsock 2.1 or better.\n");
     return 2;
   }
   if (1 != inet_pton (AF_INET, DUMMY_IP, &dummy))
   {
-    fprintf (stderr, "Internal error converting dummy IP to binary.\n");
+    fprintf (stderr,
+            "%s",
+            "Internal error converting dummy IP to binary.\n");
     return 2;
   }
   if (-1 == (rawsock = make_raw_socket ()))
     return 3;
-  send_icmp (&external, &target);
-  send_icmp_udp (&external, &target);
+  if (!privilege_testing){
+    send_icmp (&external, &target);
+    send_icmp_udp (&external, &target);
+  }
   closesocket (rawsock);
   WSACleanup ();
   return 0;