/*
* dhcpcd - DHCP client daemon
* Copyright 2006-2008 Roy Marples <roy@marples.name>
* All rights reserved
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef INTERFACE_H
#define INTERFACE_H
#include <sys/types.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <limits.h>
#include <stdbool.h>
#include "config.h"
#ifdef __linux__
# include <linux/netlink.h>
#endif
#ifdef ENABLE_DUID
#ifndef DUID_LEN
# define DUID_LEN 128 + 2
#endif
#endif
#define EUI64_ADDR_LEN 8
#define INFINIBAND_ADDR_LEN 20
/* Linux 2.4 doesn't define this */
#ifndef ARPHRD_IEEE1394
# define ARPHRD_IEEE1394 24
#endif
/* The BSD's don't define this yet */
#ifndef ARPHRD_INFINIBAND
# define ARPHRD_INFINIBAND 32
#endif
#define HWADDR_LEN 20
/* Work out if we have a private address or not
* 10/8
* 172.16/12
* 192.168/16
*/
#ifndef IN_PRIVATE
# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) || \
((addr & 0xfff00000) == 0xac100000) || \
((addr & IN_CLASSB_NET) == 0xc0a80000))
#endif
#define LINKLOCAL_ADDR 0xa9fe0000
#define LINKLOCAL_MASK 0xffff0000
#define LINKLOCAL_BRDC 0xa9feffff
#ifndef IN_LINKLOCAL
# define IN_LINKLOCAL(addr) ((addr & IN_CLASSB_NET) == LINKLOCAL_ADDR)
#endif
#ifndef STAILQ_ENTRY
# error "your sys/queue.h is too old and lacks STAILQ"
#endif
#define NSTAILQ_FOREACH(var, head, field) \
if (head) STAILQ_FOREACH (var, head, field)
typedef struct route_t
{
struct in_addr destination;
struct in_addr netmask;
struct in_addr gateway;
STAILQ_ENTRY (route_t) entries;
} route_t;
STAILQ_HEAD (route_head, route_t);
typedef struct address_t
{
struct in_addr address;
STAILQ_ENTRY (address_t) entries;
} address_t;
STAILQ_HEAD (address_head, address_t);
typedef struct interface_t
{
char name[IF_NAMESIZE];
sa_family_t family;
unsigned char hwaddr[HWADDR_LEN];
size_t hwlen;
bool arpable;
unsigned short mtu;
int fd;
size_t buffer_length;
#ifdef __linux__
int listen_fd;
int socket_protocol;
#endif
char infofile[PATH_MAX];
unsigned short previous_mtu;
struct in_addr previous_address;
struct in_addr previous_netmask;
struct route_head *previous_routes;
time_t start_uptime;
unsigned char *clientid;
size_t clientid_len;
} interface_t;
void free_address (struct address_head *addresses);
void free_route (struct route_head *routes);
uint32_t get_netmask (uint32_t addr);
char *hwaddr_ntoa (const unsigned char *hwaddr, size_t hwlen);
size_t hwaddr_aton (unsigned char *hwaddr, const char *addr);
interface_t *read_interface (const char *ifname, int metric);
int get_mtu (const char *ifname);
int set_mtu (const char *ifname, short int mtu);
int add_address (const char *ifname, struct in_addr address,
struct in_addr netmask, struct in_addr broadcast);
int del_address (const char *ifname, struct in_addr address,
struct in_addr netmask);
int flush_addresses (const char *ifname);
in_addr_t get_address (const char *ifname);
int has_address (const char *ifname, struct in_addr address);
int add_route (const char *ifname, struct in_addr destination,
struct in_addr netmask, struct in_addr gateway, int metric);
int change_route (const char *ifname, struct in_addr destination,
struct in_addr netmask, struct in_addr gateway, int metric);
int del_route (const char *ifname, struct in_addr destination,
struct in_addr netmask, struct in_addr gateway, int metric);
int inet_ntocidr (struct in_addr address);
int inet_cidrtoaddr (int cidr, struct in_addr *addr);
#ifdef __linux__
typedef int (*netlink_callback) (struct nlmsghdr *hdr, void *arg);
int send_netlink (struct nlmsghdr *hdr, netlink_callback callback, void *arg);
#endif
#endif
