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-rw-r--r--mroute.h165
1 files changed, 165 insertions, 0 deletions
diff --git a/mroute.h b/mroute.h
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+++ b/mroute.h
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+/*
+ * 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 */