1 files changed, 0 insertions, 529 deletions

diff --git a/src/nat/gnunet-helper-nat-client-windows.c b/src/nat/gnunet-helper-nat-client-windows.c
deleted file mode 100644
index 1be31ae42..000000000
--- a/src/nat/gnunet-helper-nat-client-windows.c
+++ /dev/null
@@ -1,529 +0,0 @@
-/*
-     This file is part of GNUnet.
-     Copyright (C) 2010 GNUnet e.V.
-
-     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
-     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/>.
-
-     SPDX-License-Identifier: AGPL3.0-or-later
- */
-
-/**
- * @file src/nat/gnunet-helper-nat-client-windows.c
- * @brief Tool to help bypass NATs using ICMP method; must run as
- *        administrator on W32
- *        This code is for W32.
- * @author Nathan Evans
- *
- * This program will send ONE ICMP message using RAW sockets
- * to the IP address specified as the second argument.  Since
- * it uses RAW sockets, it must be installed SUID or run as 'root'.
- * In order to keep the security risk of the resulting SUID binary
- * minimal, the program ONLY opens the RAW socket with root
- * privileges, then drops them and only then starts to process
- * command line arguments.  The code also does not link against
- * any shared libraries (except libc) and is strictly minimal
- * (except for checking for errors).  The following list of people
- * have reviewed this code and considered it safe since the last
- * modification (if you reviewed it, please have your name added
- * to the list):
- *
- * - Christian Grothoff
- * - Nathan Evans
- */
-#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>
-#include <sys/types.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <time.h>
-
-
-#define ICMP_ECHO 8
-#define IPDEFTTL 64
-#define ICMP_TIME_EXCEEDED 11
-
-/**
- * Must match IP given in the server.
- */
-#define DUMMY_IP "192.0.2.86"
-
-#define NAT_TRAV_PORT 22225
-
-/**
- * IPv4 header.
- */
-struct ip_header {
-  /**
-   * Version (4 bits) + Internet header length (4 bits)
-   */
-  uint8_t vers_ihl;
-
-  /**
-   * Type of service
-   */
-  uint8_t tos;
-
-  /**
-   * Total length
-   */
-  uint16_t pkt_len;
-
-  /**
-   * Identification
-   */
-  uint16_t id;
-
-  /**
-   * Flags (3 bits) + Fragment offset (13 bits)
-   */
-  uint16_t flags_frag_offset;
-
-  /**
-   * Time to live
-   */
-  uint8_t ttl;
-
-  /**
-   * Protocol
-   */
-  uint8_t proto;
-
-  /**
-   * Header checksum
-   */
-  uint16_t checksum;
-
-  /**
-   * Source address
-   */
-  uint32_t src_ip;
-
-  /**
-   * Destination address
-   */
-  uint32_t dst_ip;
-};
-
-
-/**
- * Format of ICMP packet.
- */
-struct icmp_ttl_exceeded_header {
-  uint8_t type;
-
-  uint8_t code;
-
-  uint16_t checksum;
-
-  uint32_t unused;
-
-  /* followed by original payload */
-};
-
-struct icmp_echo_header {
-  uint8_t type;
-
-  uint8_t code;
-
-  uint16_t checksum;
-
-  uint32_t reserved;
-};
-
-/**
- * Beginning of UDP packet.
- */
-struct udp_header {
-  uint16_t src_port;
-
-  uint16_t dst_port;
-
-  uint16_t length;
-
-  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.
- */
-static _win_socket rawsock;
-
-/**
- * Target "dummy" address.
- */
-static struct in_addr dummy;
-
-/**
- * Port we are listening on (communicated to the server).
- */
-static uint16_t port;
-
-
-
-/**
- * Convert IPv4 address from text to binary form.
- *
- * @param af address family
- * @param cp the address to print
- * @param buf where to write the address result
- * @return 1 on success
- */
-static int
-inet_pton(int af, const char *cp, struct in_addr *buf)
-{
-  buf->s_addr = inet_addr(cp);
-  if (buf->s_addr == INADDR_NONE)
-    {
-      fprintf(stderr, "Error %d handling address %s", WSAGetLastError(), cp);
-      return 0;
-    }
-  return 1;
-}
-
-
-/**
- * CRC-16 for IP/ICMP headers.
- *
- * @param data what to calculate the CRC over
- * @param bytes number of bytes in data (must be multiple of 2)
- * @return the CRC 16.
- */
-static uint16_t
-calc_checksum(const uint16_t * data, unsigned int bytes)
-{
-  uint32_t sum;
-  unsigned int i;
-
-  sum = 0;
-  for (i = 0; i < bytes / 2; i++)
-    sum += data[i];
-  sum = (sum & 0xffff) + (sum >> 16);
-  sum = htons(0xffff - sum);
-  return sum;
-}
-
-
-/**
- * Send an ICMP message to the target.
- *
- * @param my_ip source address
- * @param other target address
- */
-static void
-send_icmp_udp(const struct in_addr *my_ip, const struct in_addr *other)
-{
-  char packet[sizeof(struct ip_header) * 2 +
-              sizeof(struct icmp_ttl_exceeded_header) +
-              sizeof(struct udp_header)];
-  struct ip_header ip_pkt;
-  struct icmp_ttl_exceeded_header icmp_pkt;
-  struct udp_header udp_pkt;
-  struct sockaddr_in dst;
-  size_t off;
-  int err;
-
-  /* ip header: send to (known) ip address */
-  off = 0;
-  ip_pkt.vers_ihl = 0x45;
-  ip_pkt.tos = 0;
-  ip_pkt.pkt_len = htons(sizeof(packet));
-  ip_pkt.id = htons(256);
-  ip_pkt.flags_frag_offset = 0;
-  ip_pkt.ttl = 128;
-  ip_pkt.proto = IPPROTO_ICMP;
-  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)));
-  GNUNET_memcpy(&packet[off], &ip_pkt, sizeof(struct ip_header));
-  off += sizeof(struct ip_header);
-
-  icmp_pkt.type = ICMP_TIME_EXCEEDED;
-  icmp_pkt.code = 0;
-  icmp_pkt.checksum = 0;
-  icmp_pkt.unused = 0;
-  GNUNET_memcpy(&packet[off], &icmp_pkt, sizeof(struct icmp_ttl_exceeded_header));
-  off += sizeof(struct icmp_ttl_exceeded_header);
-
-  /* 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.id = htons(0);
-  ip_pkt.flags_frag_offset = 0;
-  ip_pkt.ttl = 128;
-  ip_pkt.proto = IPPROTO_UDP;
-  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)));
-  GNUNET_memcpy(&packet[off], &ip_pkt, sizeof(struct ip_header));
-  off += sizeof(struct ip_header);
-
-  /* build UDP header */
-  udp_pkt.src_port = htons(NAT_TRAV_PORT);
-  udp_pkt.dst_port = htons(NAT_TRAV_PORT);
-  udp_pkt.length = htons(port);
-  udp_pkt.crc = 0;
-  GNUNET_memcpy(&packet[off], &udp_pkt, sizeof(struct udp_header));
-  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)));
-  GNUNET_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));
-  if (err < 0)
-    {
-      fprintf(stderr, "sendto failed: %s\n", strerror(errno));
-    }
-  else if (sizeof(packet) != (size_t)err)
-    {
-      fprintf(stderr, "Error: partial send of ICMP message\n");
-    }
-}
-
-
-/**
- * Send an ICMP message to the target.
- *
- * @param my_ip source address
- * @param other target address
- */
-static void
-send_icmp(const struct in_addr *my_ip, const struct in_addr *other)
-{
-  struct ip_header ip_pkt;
-  struct icmp_ttl_exceeded_header icmp_ttl;
-  struct icmp_echo_header icmp_echo;
-  struct sockaddr_in dst;
-  char packet[sizeof(struct ip_header) * 2 +
-              sizeof(struct icmp_ttl_exceeded_header) +
-              sizeof(struct icmp_echo_header)];
-  size_t off;
-  int err;
-
-  /* ip header: send to (known) ip address */
-  off = 0;
-  ip_pkt.vers_ihl = 0x45;
-  ip_pkt.tos = 0;
-  ip_pkt.pkt_len = htons(sizeof(packet));
-  ip_pkt.id = htons(256);
-  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 = other->s_addr;
-  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(ip_pkt);
-
-  /* icmp reply: time exceeded */
-  icmp_ttl.type = ICMP_TIME_EXCEEDED;
-  icmp_ttl.code = 0;
-  icmp_ttl.checksum = 0;
-  icmp_ttl.unused = 0;
-  GNUNET_memcpy(&packet[off], &icmp_ttl, sizeof(struct icmp_ttl_exceeded_header));
-  off += sizeof(struct icmp_ttl_exceeded_header);
-
-  /* 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 icmp_echo_header));
-  ip_pkt.id = htons(256);
-  ip_pkt.flags_frag_offset = 0;
-  ip_pkt.ttl = 1;               /* real TTL would be 1 on a time exceeded packet */
-  ip_pkt.proto = IPPROTO_ICMP;
-  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)));
-  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 = htonl(port);
-  icmp_echo.checksum = 0;
-  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));
-
-  /* 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)));
-  GNUNET_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));
-
-  if (err < 0)
-    {
-      fprintf(stderr, "sendto failed: %s\n", strerror(errno));
-    }
-  else if (sizeof(packet) != (size_t)err)
-    {
-      fprintf(stderr, "Error: partial send of ICMP message\n");
-    }
-}
-
-
-/**
- * Create an ICMP raw socket.
- *
- * @return INVALID_SOCKET on error
- */
-static _win_socket
-make_raw_socket()
-{
-  DWORD bOptVal = TRUE;
-  int bOptLen = sizeof(bOptVal);
-  _win_socket ret;
-
-  ret = _win_socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
-  if (INVALID_SOCKET == ret)
-    {
-      fprintf(stderr, "Error opening RAW socket: %s\n", strerror(errno));
-      return INVALID_SOCKET;
-    }
-  if (0 !=
-      _win_setsockopt(ret, SOL_SOCKET, SO_BROADCAST, (char *)&bOptVal, bOptLen))
-    {
-      fprintf(stderr, "Error setting SO_BROADCAST to ON: %s\n",
-              strerror(errno));
-      closesocket(rawsock);
-      return INVALID_SOCKET;
-    }
-
-  if (0 != _win_setsockopt(ret, IPPROTO_IP, IP_HDRINCL, (char *)&bOptVal, bOptLen))
-    {
-      fprintf(stderr, "Error setting IP_HDRINCL to ON: %s\n", strerror(errno));
-      closesocket(rawsock);
-      return INVALID_SOCKET;
-    }
-  return ret;
-}
-
-
-int
-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,
-              "%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));
-      return 1;
-    }
-  if ((1 != sscanf(argv[3], "%u", &p)) || (0 == p) || (0xFFFF < p))
-    {
-      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,
-              "%s",
-              "Failed to find Winsock 2.1 or better.\n");
-      return 2;
-    }
-  if (1 != inet_pton(AF_INET, DUMMY_IP, &dummy))
-    {
-      fprintf(stderr,
-              "%s",
-              "Internal error converting dummy IP to binary.\n");
-      return 2;
-    }
-  if (-1 == (rawsock = make_raw_socket()))
-    return 3;
-  if (!privilege_testing)
-    {
-      send_icmp(&external, &target);
-      send_icmp_udp(&external, &target);
-    }
-  closesocket(rawsock);
-  WSACleanup();
-  return 0;
-}
-
-/* end of gnunet-helper-nat-client-windows.c */