/*
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
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
GNUnet 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.
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
- 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.
+ SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* - 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>
*/
#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.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));
+ GNUNET_memcpy (&packet[off], &ip_pkt, sizeof (struct ip_header));
off += sizeof (struct ip_header);
icmp_echo.type = ICMP_ECHO;
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));
+ GNUNET_memcpy (&packet[off], &icmp_echo, sizeof (struct icmp_echo_header));
off += sizeof (struct icmp_echo_header);
memset (&dst, 0, sizeof (dst));
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)
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:
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:
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,
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;
}