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/*
 *
 *  DHCP library with GLib integration
 *
 *  Copyright (C) 2009-2010  Intel Corporation. All rights reserved.
 *
 *  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; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef __G_DHCP_H
#define __G_DHCP_H

#include <glib.h>

#ifdef __cplusplus
extern "C" {
#endif

/* DHCP Client part*/
struct _GDHCPClient;

typedef struct _GDHCPClient GDHCPClient;

typedef enum {
	G_DHCP_CLIENT_ERROR_NONE,
	G_DHCP_CLIENT_ERROR_INTERFACE_UNAVAILABLE,
	G_DHCP_CLIENT_ERROR_INTERFACE_IN_USE,
	G_DHCP_CLIENT_ERROR_INTERFACE_DOWN,
	G_DHCP_CLIENT_ERROR_NOMEM,
	G_DHCP_CLIENT_ERROR_INVALID_INDEX,
	G_DHCP_CLIENT_ERROR_INVALID_OPTION
} GDHCPClientError;

typedef enum {
	G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
	G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE,
	G_DHCP_CLIENT_EVENT_NO_LEASE,
	G_DHCP_CLIENT_EVENT_LEASE_LOST,
	G_DHCP_CLIENT_EVENT_IPV4LL_LOST,
	G_DHCP_CLIENT_EVENT_ADDRESS_CONFLICT,
} GDHCPClientEvent;

typedef enum {
	G_DHCP_IPV4,
	G_DHCP_IPV6,
	G_DHCP_IPV4LL,
} GDHCPType;

#define G_DHCP_SUBNET		0x01
#define G_DHCP_ROUTER		0x03
#define G_DHCP_TIME_SERVER	0x04
#define G_DHCP_DNS_SERVER	0x06
#define G_DHCP_DOMAIN_NAME	0x0f
#define G_DHCP_HOST_NAME	0x0c
#define G_DHCP_NTP_SERVER	0x2a

typedef void (*GDHCPClientEventFunc) (GDHCPClient *client, gpointer user_data);

typedef void (*GDHCPDebugFunc)(const char *str, gpointer user_data);

GDHCPClient *g_dhcp_client_new(GDHCPType type, int index,
						GDHCPClientError *error);

int g_dhcp_client_start(GDHCPClient *client, const char *last_address);
void g_dhcp_client_stop(GDHCPClient *client);

GDHCPClient *g_dhcp_client_ref(GDHCPClient *client);
void g_dhcp_client_unref(GDHCPClient *client);

void g_dhcp_client_register_event(GDHCPClient *client,
					GDHCPClientEvent event,
					GDHCPClientEventFunc func,
					gpointer user_data);

GDHCPClientError g_dhcp_client_set_request(GDHCPClient *client,
						unsigned char option_code);
GDHCPClientError g_dhcp_client_set_send(GDHCPClient *client,
						unsigned char option_code,
						const char *option_value);

char *g_dhcp_client_get_address(GDHCPClient *client);
char *g_dhcp_client_get_netmask(GDHCPClient *client);
GList *g_dhcp_client_get_option(GDHCPClient *client,
						unsigned char option_code);
int g_dhcp_client_get_index(GDHCPClient *client);

void g_dhcp_client_set_debug(GDHCPClient *client,
				GDHCPDebugFunc func, gpointer user_data);

/* DHCP Server */
typedef enum {
	G_DHCP_SERVER_ERROR_NONE,
	G_DHCP_SERVER_ERROR_INTERFACE_UNAVAILABLE,
	G_DHCP_SERVER_ERROR_INTERFACE_IN_USE,
	G_DHCP_SERVER_ERROR_INTERFACE_DOWN,
	G_DHCP_SERVER_ERROR_NOMEM,
	G_DHCP_SERVER_ERROR_INVALID_INDEX,
	G_DHCP_SERVER_ERROR_INVALID_OPTION,
	G_DHCP_SERVER_ERROR_IP_ADDRESS_INVALID
} GDHCPServerError;

typedef void (*GDHCPSaveLeaseFunc) (unsigned char *mac,
			unsigned int nip, unsigned int expire);
struct _GDHCPServer;

typedef struct _GDHCPServer GDHCPServer;

GDHCPServer *g_dhcp_server_new(GDHCPType type,
		int ifindex, GDHCPServerError *error);
int g_dhcp_server_start(GDHCPServer *server);
void g_dhcp_server_stop(GDHCPServer *server);

GDHCPServer *g_dhcp_server_ref(GDHCPServer *server);
void g_dhcp_server_unref(GDHCPServer *server);

int g_dhcp_server_set_option(GDHCPServer *server,
		unsigned char option_code, const char *option_value);
int g_dhcp_server_set_ip_range(GDHCPServer *server,
		const char *start_ip, const char *end_ip);
void g_dhcp_server_load_lease(GDHCPServer *dhcp_server, unsigned int expire,
				unsigned char *mac, unsigned int lease_ip);
void g_dhcp_server_set_debug(GDHCPServer *server,
				GDHCPDebugFunc func, gpointer user_data);
void g_dhcp_server_set_lease_time(GDHCPServer *dhcp_server,
						unsigned int lease_time);
void g_dhcp_server_set_save_lease(GDHCPServer *dhcp_server,
				GDHCPSaveLeaseFunc func, gpointer user_data);
#ifdef __cplusplus
}
#endif

#endif /* __G_DHCP_H */