1 files changed, 231 insertions, 0 deletions
diff --git a/src/libstrongswan/networking/host.h b/src/libstrongswan/networking/host.h
new file mode 100644
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+++ b/src/libstrongswan/networking/host.h
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2006-2009 Tobias Brunner
+ * Copyright (C) 2006 Daniel Roethlisberger
+ * Copyright (C) 2005-2008 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup host host
+ * @{ @ingroup networking
+ */
+
+#ifndef HOST_H_
+#define HOST_H_
+
+typedef enum host_diff_t host_diff_t;
+typedef struct host_t host_t;
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <utils/chunk.h>
+
+/**
+ * Differences between two hosts. They differ in
+ * address, port, or both.
+ */
+enum host_diff_t {
+	HOST_DIFF_NONE = 0,
+	HOST_DIFF_ADDR = 1,
+	HOST_DIFF_PORT = 2,
+};
+
+/**
+ * Representates a Host
+ *
+ * Host object, identifies a address:port pair and defines some
+ * useful functions on it.
+ */
+struct host_t {
+
+	/**
+	 * Build a clone of this host object.
+	 *
+	 * @return		cloned host
+	 */
+	host_t *(*clone) (host_t *this);
+
+	/**
+	 * Get a pointer to the internal sockaddr struct.
+	 *
+	 * This is used for sending and receiving via sockets.
+	 *
+	 * @return		pointer to the internal sockaddr structure
+	 */
+	sockaddr_t  *(*get_sockaddr) (host_t *this);
+
+	/**
+	 * Get the length of the sockaddr struct.
+	 *
+	 * Depending on the family, the length of the sockaddr struct
+	 * is different. Use this function to get the length of the sockaddr
+	 * struct returned by get_sock_addr.
+	 *
+	 * This is used for sending and receiving via sockets.
+	 *
+	 * @return		length of the sockaddr struct
+	 */
+	socklen_t *(*get_sockaddr_len) (host_t *this);
+
+	/**
+	 * Gets the family of the address
+	 *
+	 * @return		family
+	 */
+	int (*get_family) (host_t *this);
+
+	/**
+	 * Checks if the ip address of host is set to default route.
+	 *
+	 * @return		TRUE if host is 0.0.0.0 or 0::0, FALSE otherwise
+	 */
+	bool (*is_anyaddr) (host_t *this);
+
+	/**
+	 * Get the address of this host as chunk_t
+	 *
+	 * Returned chunk points to internal data.
+	 *
+	 * @return		address string,
+	 */
+	chunk_t (*get_address) (host_t *this);
+
+	/**
+	 * Get the port of this host
+	 *
+	 * @return		port number
+	 */
+	u_int16_t (*get_port) (host_t *this);
+
+	/**
+	 * Set the port of this host
+	 *
+	 * @param port	port numer
+	 */
+	void (*set_port) (host_t *this, u_int16_t port);
+
+	/**
+	 * Compare the ips of two hosts hosts.
+	 *
+	 * @param other	the other to compare
+	 * @return		TRUE if addresses are equal.
+	 */
+	bool (*ip_equals) (host_t *this, host_t *other);
+
+	/**
+	 * Compare two hosts, with port.
+	 *
+	 * @param other	the other to compare
+	 * @return		TRUE if addresses and ports are equal.
+	 */
+	bool (*equals) (host_t *this, host_t *other);
+
+	/**
+	 * Compare two hosts and return the differences.
+	 *
+	 * @param other	the other to compare
+	 * @return		differences in a combination of host_diff_t's
+	 */
+	host_diff_t (*get_differences) (host_t *this, host_t *other);
+
+	/**
+	 * Destroy this host object.
+	 */
+	void (*destroy) (host_t *this);
+};
+
+/**
+ * Constructor to create a host_t object from an address string.
+ *
+ * @param string		string of an address, such as "152.96.193.130"
+ * @param port			port number
+ * @return				host_t, NULL if string not an address.
+ */
+host_t *host_create_from_string(char *string, u_int16_t port);
+
+/**
+ * Same as host_create_from_string(), but with the option to enforce a family.
+ *
+ * @param string		string of an address
+ * @param family		address family, or AF_UNSPEC
+ * @param port			port number
+ * @return				host_t, NULL if string not an address.
+ */
+host_t *host_create_from_string_and_family(char *string, int family,
+										   u_int16_t port);
+
+/**
+ * Constructor to create a host_t from a DNS name.
+ *
+ * @param string		hostname to resolve
+ * @param family		family to prefer, 0 for first match
+ * @param port			port number
+ * @return				host_t, NULL lookup failed
+ */
+host_t *host_create_from_dns(char *string, int family, u_int16_t port);
+
+/**
+ * Constructor to create a host_t object from an address chunk.
+ *
+ * If family is AF_UNSPEC, it is guessed using address.len.
+ *
+ * @param family		Address family, such as AF_INET or AF_INET6
+ * @param address		address as chunk_t in network order
+ * @param port			port number
+ * @return				host_t, NULL if family not supported/chunk invalid
+ */
+host_t *host_create_from_chunk(int family, chunk_t address, u_int16_t port);
+
+/**
+ * Constructor to create a host_t object from a sockaddr struct
+ *
+ * @param sockaddr		sockaddr struct which contains family, address and port
+ * @return				host_t, NULL if family not supported
+ */
+host_t *host_create_from_sockaddr(sockaddr_t *sockaddr);
+
+/**
+ * Create a host from a CIDR subnet definition (1.2.3.0/24), return bits.
+ *
+ * @param string		string to parse
+ * @param bits			gets the number of network bits in CIDR notation
+ * @return				network start address, NULL on error
+ */
+host_t *host_create_from_subnet(char *string, int *bits);
+
+/**
+ * Create a host without an address, a "any" host.
+ *
+ * @param family		family of the any host
+ * @return				host_t, NULL if family not supported
+ */
+host_t *host_create_any(int family);
+
+/**
+ * printf hook function for host_t.
+ *
+ * Arguments are:
+ *	host_t *host
+ * Use #-modifier to include port number
+ * Use +-modifier to force numeric representation (instead of e.g. %any)
+ */
+int host_printf_hook(printf_hook_data_t *data, printf_hook_spec_t *spec,
+					 const void *const *args);
+
+#endif /** HOST_H_ @}*/