This is the start of the BETA21 branch.

It includes the --topology feature, and
TAP-Win32 driver changes to allow
non-admin access.



git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@580 e7ae566f-a301-0410-adde-c780ea21d3b5

1 files changed, 165 insertions, 0 deletions

diff --git a/mroute.h b/mroute.h
new file mode 100644
index 0000000..87e952c
--- /dev/null
+++ b/mroute.h
@@ -0,0 +1,165 @@
+/*
+ *  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) 2002-2005 OpenVPN Solutions LLC <info@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
+ */
+
+#ifndef MROUTE_H
+#define MROUTE_H
+
+#if P2MP_SERVER
+
+#include "buffer.h"
+#include "list.h"
+#include "route.h"
+
+#define IP_MCAST_SUBNET_MASK  ((in_addr_t)240<<24)
+#define IP_MCAST_NETWORK      ((in_addr_t)224<<24)
+
+/* Return status values for mroute_extract_addr_from_packet */
+#define MROUTE_EXTRACT_SUCCEEDED (1<<1)
+#define MROUTE_EXTRACT_BCAST     (1<<2)
+#define MROUTE_EXTRACT_MCAST     (1<<3)
+#define MROUTE_EXTRACT_IGMP      (1<<4)
+
+/*
+ * Choose the largest address possible with
+ * any of our supported types, which is IPv6
+ * with port number.
+ */
+#define MR_MAX_ADDR_LEN 20
+
+/*
+ * Address Types
+ */
+#define MR_ADDR_NONE             0
+#define MR_ADDR_ETHER            1
+#define MR_ADDR_IPV4             2
+#define MR_ADDR_IPV6             3
+#define MR_ADDR_MASK             3
+
+/* Address type mask indicating that port # is part of address */
+#define MR_WITH_PORT             4
+
+/* Address type mask indicating that netbits is part of address */
+#define MR_WITH_NETBITS          8
+
+struct mroute_addr {
+  uint8_t len;      /* length of address */
+  uint8_t unused;
+  uint8_t type;     /* MR_ADDR/MR_WITH flags */
+  uint8_t netbits;  /* number of bits in network part of address,
+		       valid if MR_WITH_NETBITS is set */
+  uint8_t addr[MR_MAX_ADDR_LEN];  /* actual address */
+};
+
+/*
+ * Number of bits in an address.  Should be raised for
+ * IPv6.
+ */
+#define MR_HELPER_NET_LEN 32
+
+/*
+ * Used to help maintain CIDR routing table.
+ */
+struct mroute_helper {
+  /*MUTEX_DEFINE (mutex);*/
+  unsigned int cache_generation; /* incremented when route added */
+  int ageable_ttl_secs;          /* host route cache entry time-to-live*/
+  int n_net_len;                 /* length of net_len array */
+  uint8_t net_len[MR_HELPER_NET_LEN];      /* CIDR netlengths in descending order */
+  int net_len_refcount[MR_HELPER_NET_LEN]; /* refcount of each netlength */
+};
+
+unsigned int mroute_extract_addr_from_packet (struct mroute_addr *src,
+					      struct mroute_addr *dest,
+					      struct buffer *buf,
+					      int tunnel_type);
+
+bool mroute_extract_sockaddr_in (struct mroute_addr *addr,
+				 const struct sockaddr_in *saddr,
+				 bool use_port);
+
+bool mroute_learnable_address (const struct mroute_addr *addr);
+
+uint32_t mroute_addr_hash_function (const void *key, uint32_t iv);
+bool mroute_addr_compare_function (const void *key1, const void *key2);
+
+void mroute_addr_init (struct mroute_addr *addr);
+
+const char *mroute_addr_print (const struct mroute_addr *ma,
+			       struct gc_arena *gc);
+
+void mroute_addr_mask_host_bits (struct mroute_addr *ma);
+
+struct mroute_helper *mroute_helper_init (int ageable_ttl_secs);
+void mroute_helper_free (struct mroute_helper *mh);
+void mroute_helper_add_iroute (struct mroute_helper *mh, const struct iroute *ir);
+void mroute_helper_del_iroute (struct mroute_helper *mh, const struct iroute *ir);
+
+static inline void
+mroute_helper_lock (struct mroute_helper *mh)
+{
+  /*mutex_lock (&mh->mutex);*/
+}
+
+static inline void
+mroute_helper_unlock (struct mroute_helper *mh)
+{
+  /*mutex_unlock (&mh->mutex);*/
+}
+
+static inline bool
+mroute_addr_equal (const struct mroute_addr *a1, const struct mroute_addr *a2)
+{
+  if (a1->type != a2->type)
+    return false;
+  if (a1->netbits != a2->netbits)
+    return false;
+  if (a1->len != a2->len)
+    return false;
+  return memcmp (a1->addr, a2->addr, a1->len) == 0;
+}
+
+static inline const uint8_t *
+mroute_addr_hash_ptr (const struct mroute_addr *a)
+{
+  /* NOTE: depends on ordering of struct mroute_addr */
+  return (uint8_t *) &a->type;
+}
+
+static inline uint32_t
+mroute_addr_hash_len (const struct mroute_addr *a)
+{
+  return (uint32_t) a->len + 2;
+}
+
+static inline void
+mroute_extract_in_addr_t (struct mroute_addr *dest, const in_addr_t src)
+{
+  dest->type = MR_ADDR_IPV4;
+  dest->netbits = 0;
+  dest->len = 4;
+  *(in_addr_t*)dest->addr = htonl (src);
+}
+
+#endif /* P2MP_SERVER */
+#endif /* MROUTE_H */