/*
This file is part of GNUnet.
- (C) 2010 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2010 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
* - Christian Grothoff
*/
#define _GNU_SOURCE
+/* Instead of including gnunet_common.h */
+#define GNUNET_memcpy(dst,src,n) do { if (0 != n) { (void) memcpy (dst,src,n); } } while (0)
-
+#define FD_SETSIZE 1024
#include <winsock2.h>
#include <ws2tcpip.h>
#include <sys/time.h>
*/
#define NAT_TRAV_PORT 22225
+/**
+ * Must match packet ID used by gnunet-helper-nat-client.c
+ */
+#define PACKET_ID 256
+
/**
* TTL to use for our outgoing messages.
*/
uint16_t crc;
};
+/**
+ * Will this binary be run in permissions testing mode?
+ */
+static boolean privilege_testing = FALSE;
+
/**
* Socket we use to receive "fake" ICMP replies.
*/
ip_pkt.vers_ihl = 0x45;
ip_pkt.tos = 0;
ip_pkt.pkt_len = htons (sizeof (packet));
- ip_pkt.id = htons (256);
+ ip_pkt.id = htons (PACKET_ID);
ip_pkt.flags_frag_offset = 0;
ip_pkt.ttl = IPDEFTTL;
ip_pkt.proto = IPPROTO_ICMP;
ip_pkt.checksum = 0;
ip_pkt.src_ip = my_ip->s_addr;
ip_pkt.dst_ip = dummy.s_addr;
- ip_pkt.checksum = htons (calc_checksum ((uint16_t *) & ip_pkt,
- sizeof (struct ip_header)));
- memcpy (&packet[off], &ip_pkt, sizeof (struct ip_header));
+ ip_pkt.checksum =
+ htons (calc_checksum ((uint16_t *) & ip_pkt, sizeof (struct ip_header)));
+ GNUNET_memcpy (&packet[off], &ip_pkt, sizeof (struct ip_header));
off += sizeof (struct ip_header);
icmp_echo.type = ICMP_ECHO;
icmp_echo.code = 0;
icmp_echo.reserved = 0;
icmp_echo.checksum = 0;
- 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));
+ icmp_echo.checksum =
+ htons (calc_checksum
+ ((uint16_t *) & icmp_echo, sizeof (struct icmp_echo_header)));
+ GNUNET_memcpy (&packet[off], &icmp_echo, sizeof (struct icmp_echo_header));
off += sizeof (struct icmp_echo_header);
memset (&dst, 0, sizeof (dst));
dst.sin_family = AF_INET;
dst.sin_addr = dummy;
- err = sendto (rawsock,
- packet, off, 0, (struct sockaddr *) &dst, sizeof (dst));
+ err =
+ sendto (rawsock, packet, off, 0, (struct sockaddr *) &dst, sizeof (dst));
if (err < 0)
{
#if VERBOSE
return;
}
off = 0;
- memcpy (&ip_pkt, &buf[off], sizeof (struct ip_header));
+ GNUNET_memcpy (&ip_pkt, &buf[off], sizeof (struct ip_header));
off += sizeof (struct ip_header);
- memcpy (&source_ip, &ip_pkt.src_ip, sizeof (source_ip));
- memcpy (&icmp_ttl, &buf[off], sizeof (struct icmp_ttl_exceeded_header));
+ GNUNET_memcpy (&source_ip, &ip_pkt.src_ip, sizeof (source_ip));
+ GNUNET_memcpy (&icmp_ttl, &buf[off], sizeof (struct icmp_ttl_exceeded_header));
off += sizeof (struct icmp_ttl_exceeded_header);
if ((ICMP_TIME_EXCEEDED != icmp_ttl.type) || (0 != icmp_ttl.code))
{
return;
}
/* skip 2nd IP header */
- memcpy (&ip_pkt, &buf[off], sizeof (struct ip_header));
+ GNUNET_memcpy (&ip_pkt, &buf[off], sizeof (struct ip_header));
off += sizeof (struct ip_header);
switch (ip_pkt.proto)
{
case IPPROTO_ICMP:
- if (have != (sizeof (struct ip_header) * 2 +
- sizeof (struct icmp_ttl_exceeded_header) +
- sizeof (struct icmp_echo_header)))
+ if (have !=
+ (sizeof (struct ip_header) * 2 +
+ sizeof (struct icmp_ttl_exceeded_header) +
+ sizeof (struct icmp_echo_header)))
{
/* malformed */
return;
}
/* grab ICMP ECHO content */
- memcpy (&icmp_echo, &buf[off], sizeof (struct icmp_echo_header));
+ GNUNET_memcpy (&icmp_echo, &buf[off], sizeof (struct icmp_echo_header));
port = (uint16_t) ntohl (icmp_echo.reserved);
break;
case IPPROTO_UDP:
- if (have != (sizeof (struct ip_header) * 2 +
- sizeof (struct icmp_ttl_exceeded_header) +
- sizeof (struct udp_header)))
+ if (have !=
+ (sizeof (struct ip_header) * 2 +
+ sizeof (struct icmp_ttl_exceeded_header) + sizeof (struct udp_header)))
{
/* malformed */
return;
}
/* grab UDP content */
- memcpy (&udp_pkt, &buf[off], sizeof (struct udp_header));
+ GNUNET_memcpy (&udp_pkt, &buf[off], sizeof (struct udp_header));
port = ntohs (udp_pkt.length);
break;
default:
}
ssize = sizeof (buf);
- WSAAddressToString ((LPSOCKADDR) & source_ip,
- sizeof (source_ip), NULL, buf, &ssize);
+ WSAAddressToString ((LPSOCKADDR) & source_ip, sizeof (source_ip), NULL, buf,
+ &ssize);
if (port == 0)
fprintf (stdout, "%s\n", buf);
else
return INVALID_SOCKET;
}
- if (0 != setsockopt (rawsock,
- SOL_SOCKET, SO_BROADCAST, (char *) &bOptVal, bOptLen))
+ if (0 !=
+ setsockopt (rawsock, 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;
}
- if (0 != setsockopt (rawsock,
- IPPROTO_IP, IP_HDRINCL, (char *) &bOptVal, bOptLen))
+ if (0 !=
+ setsockopt (rawsock, IPPROTO_IP, IP_HDRINCL, (char *) &bOptVal, bOptLen))
{
fprintf (stderr, "Error setting IP_HDRINCL to ON: %s\n", strerror (errno));
closesocket (rawsock);
addr.sin_port = htons (NAT_TRAV_PORT);
if (0 != bind (ret, (struct sockaddr *) &addr, sizeof (addr)))
{
- fprintf (stderr,
- "Error binding UDP socket to port %u: %s\n",
- NAT_TRAV_PORT, strerror (errno));
+ fprintf (stderr, "Error binding UDP socket to port %u: %s\n", NAT_TRAV_PORT,
+ strerror (errno));
/* likely problematic, but not certain, try to continue */
}
return ret;
fd_set rs;
struct timeval tv;
WSADATA wsaData;
- unsigned int alt;
+ unsigned int alt = 0;
+
+ if ( (argc > 1) && (0 != strcmp (argv[1], "-d")))
+ {
+ privilege_testing = TRUE;
+ fprintf (stderr,
+ "%s",
+ "DEBUG: Running binary in privilege testing mode.");
+ argv++;
+ argc--;
+ }
- alt = 0;
if (2 != argc)
{
fprintf (stderr,
}
if (1 != inet_pton (AF_INET, argv[1], &external))
{
- fprintf (stderr,
- "Error parsing IPv4 address: %s, error %s\n",
- argv[1], strerror (errno));
+ fprintf (stderr, "Error parsing IPv4 address: %s, error %s\n", argv[1],
+ strerror (errno));
return 1;
}
if (1 != inet_pton (AF_INET, DUMMY_IP, &dummy))
closesocket (rawsock);
return 3;
}
- while (1)
+
+ while ( ! privilege_testing)
{
FD_ZERO (&rs);
FD_SET (icmpsock, &rs);
closesocket (rawsock);
closesocket (udpsock);
WSACleanup ();
+ if (privilege_testing)
+ return 0;
return 4;
}
projects / oweals / gnunet.git / blobdiff