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Diffstat (limited to 'app/openvpn/src/openvpn/clinat.c')
-rw-r--r--app/openvpn/src/openvpn/clinat.c265
1 files changed, 0 insertions, 265 deletions
diff --git a/app/openvpn/src/openvpn/clinat.c b/app/openvpn/src/openvpn/clinat.c
deleted file mode 100644
index ddefe123..00000000
--- a/app/openvpn/src/openvpn/clinat.c
+++ /dev/null
@@ -1,265 +0,0 @@
-/*
- * OpenVPN -- An application to securely tunnel IP networks
- * over a single TCP/UDP port, with support for SSL/TLS-based
- * session authentication and key exchange,
- * packet encryption, packet authentication, and
- * packet compression.
- *
- * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * 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 (see the file COPYING included with this
- * distribution); if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#elif defined(_MSC_VER)
-#include "config-msvc.h"
-#endif
-
-#include "syshead.h"
-
-#include "clinat.h"
-#include "proto.h"
-#include "socket.h"
-#include "memdbg.h"
-
-static bool
-add_entry(struct client_nat_option_list *dest,
- const struct client_nat_entry *e)
-{
- if (dest->n >= MAX_CLIENT_NAT)
- {
- msg (M_WARN, "WARNING: client-nat table overflow (max %d entries)", MAX_CLIENT_NAT);
- return false;
- }
- else
- {
- dest->entries[dest->n++] = *e;
- return true;
- }
-}
-
-void
-print_client_nat_list(const struct client_nat_option_list *list, int msglevel)
-{
- struct gc_arena gc = gc_new ();
- int i;
-
- msg (msglevel, "*** CNAT list");
- if (list)
- {
- for (i = 0; i < list->n; ++i)
- {
- const struct client_nat_entry *e = &list->entries[i];
- msg (msglevel, " CNAT[%d] t=%d %s/%s/%s",
- i,
- e->type,
- print_in_addr_t (e->network, IA_NET_ORDER, &gc),
- print_in_addr_t (e->netmask, IA_NET_ORDER, &gc),
- print_in_addr_t (e->foreign_network, IA_NET_ORDER, &gc));
- }
- }
- gc_free (&gc);
-}
-
-struct client_nat_option_list *
-new_client_nat_list (struct gc_arena *gc)
-{
- struct client_nat_option_list *ret;
- ALLOC_OBJ_CLEAR_GC (ret, struct client_nat_option_list, gc);
- return ret;
-}
-
-struct client_nat_option_list *
-clone_client_nat_option_list (const struct client_nat_option_list *src, struct gc_arena *gc)
-{
- struct client_nat_option_list *ret;
- ALLOC_OBJ_GC (ret, struct client_nat_option_list, gc);
- *ret = *src;
- return ret;
-}
-
-void
-copy_client_nat_option_list (struct client_nat_option_list *dest,
- const struct client_nat_option_list *src)
-{
- int i;
- for (i = 0; i < src->n; ++i)
- {
- if (!add_entry(dest, &src->entries[i]))
- break;
- }
-}
-
-void
-add_client_nat_to_option_list (struct client_nat_option_list *dest,
- const char *type,
- const char *network,
- const char *netmask,
- const char *foreign_network,
- int msglevel)
-{
- struct client_nat_entry e;
- bool ok;
-
- if (!strcmp(type, "snat"))
- e.type = CN_SNAT;
- else if (!strcmp(type, "dnat"))
- e.type = CN_DNAT;
- else
- {
- msg(msglevel, "client-nat: type must be 'snat' or 'dnat'");
- return;
- }
-
- e.network = getaddr(0, network, 0, &ok, NULL);
- if (!ok)
- {
- msg(msglevel, "client-nat: bad network: %s", network);
- return;
- }
- e.netmask = getaddr(0, netmask, 0, &ok, NULL);
- if (!ok)
- {
- msg(msglevel, "client-nat: bad netmask: %s", netmask);
- return;
- }
- e.foreign_network = getaddr(0, foreign_network, 0, &ok, NULL);
- if (!ok)
- {
- msg(msglevel, "client-nat: bad foreign network: %s", foreign_network);
- return;
- }
-
- add_entry(dest, &e);
-}
-
-#if 0
-static void
-print_checksum (struct openvpn_iphdr *iph, const char *prefix)
-{
- uint16_t *sptr;
- unsigned int sum = 0;
- int i = 0;
- for (sptr = (uint16_t *)iph; (uint8_t *)sptr < (uint8_t *)iph + sizeof(struct openvpn_iphdr); sptr++)
- {
- i += 1;
- sum += *sptr;
- }
- msg (M_INFO, "** CKSUM[%d] %s %08x", i, prefix, sum);
-}
-#endif
-
-static void
-print_pkt (struct openvpn_iphdr *iph, const char *prefix, const int direction, const int msglevel)
-{
- struct gc_arena gc = gc_new ();
-
- char *dirstr = "???";
- if (direction == CN_OUTGOING)
- dirstr = "OUT";
- else if (direction == CN_INCOMING)
- dirstr = "IN";
-
- msg(msglevel, "** CNAT %s %s %s -> %s",
- dirstr,
- prefix,
- print_in_addr_t (iph->saddr, IA_NET_ORDER, &gc),
- print_in_addr_t (iph->daddr, IA_NET_ORDER, &gc));
-
- gc_free (&gc);
-}
-
-void
-client_nat_transform (const struct client_nat_option_list *list,
- struct buffer *ipbuf,
- const int direction)
-{
- struct ip_tcp_udp_hdr *h = (struct ip_tcp_udp_hdr *) BPTR (ipbuf);
- int i;
- uint32_t addr, *addr_ptr;
- const uint32_t *from, *to;
- int accumulate = 0;
- unsigned int amask;
- unsigned int alog = 0;
-
- if (check_debug_level (D_CLIENT_NAT))
- print_pkt (&h->ip, "BEFORE", direction, D_CLIENT_NAT);
-
- for (i = 0; i < list->n; ++i)
- {
- const struct client_nat_entry *e = &list->entries[i]; /* current NAT rule */
- if (e->type ^ direction)
- {
- addr = *(addr_ptr = &h->ip.daddr);
- amask = 2;
- }
- else
- {
- addr = *(addr_ptr = &h->ip.saddr);
- amask = 1;
- }
- if (direction)
- {
- from = &e->foreign_network;
- to = &e->network;
- }
- else
- {
- from = &e->network;
- to = &e->foreign_network;
- }
-
- if (((addr & e->netmask) == *from) && !(amask & alog))
- {
- /* pre-adjust IP checksum */
- ADD_CHECKSUM_32(accumulate, addr);
-
- /* do NAT transform */
- addr = (addr & ~e->netmask) | *to;
-
- /* post-adjust IP checksum */
- SUB_CHECKSUM_32(accumulate, addr);
-
- /* write the modified address to packet */
- *addr_ptr = addr;
-
- /* mark as modified */
- alog |= amask;
- }
- }
- if (alog)
- {
- if (check_debug_level (D_CLIENT_NAT))
- print_pkt (&h->ip, "AFTER", direction, D_CLIENT_NAT);
-
- ADJUST_CHECKSUM(accumulate, h->ip.check);
-
- if (h->ip.protocol == OPENVPN_IPPROTO_TCP)
- {
- if (BLEN(ipbuf) >= sizeof(struct openvpn_iphdr) + sizeof(struct openvpn_tcphdr))
- {
- ADJUST_CHECKSUM(accumulate, h->u.tcp.check);
- }
- }
- else if (h->ip.protocol == OPENVPN_IPPROTO_UDP)
- {
- if (BLEN(ipbuf) >= sizeof(struct openvpn_iphdr) + sizeof(struct openvpn_udphdr))
- {
- ADJUST_CHECKSUM(accumulate, h->u.udp.check);
- }
- }
- }
-}
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