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/* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _NET_IF_H
#define _NET_IF_H 1
#include <features.h>
#include <sys/types.h>
#include <sys/socket.h>
/* Standard interface flags. */
enum
{
IFF_UP = 0x1, /* Interface is up. */
#define IFF_UP IFF_UP
IFF_BROADCAST = 0x2, /* Broadcast address valid. */
#define IFF_BROADCAST IFF_BROADCAST
IFF_DEBUG = 0x4, /* Turn on debugging. */
#define IFF_DEBUG IFF_DEBUG
IFF_LOOPBACK = 0x8, /* Is a loopback net. */
#define IFF_LOOPBACK IFF_LOOPBACK
IFF_POINTOPOINT = 0x10, /* Interface is point-to-point link. */
#define IFF_POINTOPOINT IFF_POINTOPOINT
IFF_NOTRAILERS = 0x20, /* Avoid use of trailers. */
#define IFF_NOTRAILERS IFF_NOTRAILERS
IFF_RUNNING = 0x40, /* Resources allocated. */
#define IFF_RUNNING IFF_RUNNING
IFF_NOARP = 0x80, /* No address resolution protocol. */
#define IFF_NOARP IFF_NOARP
IFF_PROMISC = 0x100, /* Receive all packets. */
#define IFF_PROMISC IFF_PROMISC
/* Not supported */
IFF_ALLMULTI = 0x200, /* Receive all multicast packets. */
#define IFF_ALLMULTI IFF_ALLMULTI
IFF_OACTIVE = 0x400, /* Transmission in progress. */
#define IFF_OACTIVE IFF_OACTIVE
IFF_SIMPLEX = 0x800, /* Cannot hear own transmissions. */
#define IFF_SIMPLEX IFF_SIMPLEX
IFF_DO_HW_LOOPBACK = 0x10000, /* Force loopback through hardware. */
#define IFF_DO_HW_LOOPBACK IFF_DO_HW_LOOPBACK
IFF_ALLCAST = 0x20000, /* Global broadcast. */
#define IFF_ALLCAST IFF_ALLCAST
IFF_BRIDGE = 0x40000, /* Receive all bridge packets. */
#define IFF_BRIDGE IFF_BRIDGE
IFF_NOECHO = IFF_SIMPLEX, /* Reeives echo packets. */
#define IFF_NOECHO IFF_NOECHO
};
/* The ifaddr structure contains information about one address of an
interface. They are maintained by the different address families,
are allocated and attached when an address is set, and are linked
together so all addresses for an interface can be located. */
struct ifaddr
{
struct sockaddr ifa_addr; /* Address of interface. */
union
{
struct sockaddr ifu_broadaddr;
struct sockaddr ifu_dstaddr;
} ifa_ifu;
struct sockaddr *ifa_netmask; /* Used to determine subnet. */
struct iface *ifa_ifp; /* Back-pointer to interface. */
struct ifaddr *ifa_next; /* Next address for interface. */
void (*ifa_rtrequest) (void);
struct rtentry *ifa_rt;
unsigned short int ifa_flags;
short int ifa_refcnt;
};
#define ifa_broadaddr ifa_ifu.ifu_broadaddr /* broadcast address */
#define ifa_dstaddr ifa_ifu.ifu_dstaddr /* other end of link */
/* Interface request structure used for socket ioctl's. All interface
ioctl's must have parameter definitions which begin with ifr_name.
The remainder may be interface specific. */
struct ifreq
{
#define IFHWADDRLEN 6
#define IFNAMSIZ 16
union
{
char ifrn_name[IFNAMSIZ]; /* Interface name, e.g. "en0". */
} ifr_ifrn;
union
{
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short int ifru_flags;
int ifru_ivalue;
unsigned int ifru_mtu;
char ifru_slave[IFNAMSIZ]; /* Just fits the size */
__caddr_t ifru_data;
unsigned short int ifru_site6;
} ifr_ifru;
};
/* Old AIX 3.1 version. */
struct oifreq
{
char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
union
{
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
int ifru_flags;
int ifru_metric;
caddr_t ifru_data;
unsigned int ifru_mtu;
} ifr_ifru;
unsigned char reserved[8];
};
#define ifr_name ifr_ifrn.ifrn_name /* interface name */
#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
#define ifr_addr ifr_ifru.ifru_addr /* address */
#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */
#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
#define ifr_flags ifr_ifru.ifru_flags /* flags */
#define ifr_metric ifr_ifru.ifru_ivalue /* metric */
#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
#define ifr_slave ifr_ifru.ifru_slave /* slave device */
#define ifr_data ifr_ifru.ifru_data /* for use by interface */
#define ifr_ifindex ifr_ifru.ifru_ivalue /* interface index */
#define ifr_bandwidth ifr_ifru.ifru_ivalue /* link bandwidth */
#define ifr_baudrate ifr_ifru.ifru_ivalue /* link bandwidth */
#define ifr_qlen ifr_ifru.ifru_ivalue /* queue length */
#define ifr_site6 ifr_ifru.ifru_site6 /* IPv6 site index */
/* Structure used in SIOCGIFCONF request. Used to retrieve interface
configuration for machine (useful for programs which must know all
networks accessible). */
struct ifconf
{
int ifc_len; /* Size of buffer. */
union
{
__caddr_t ifcu_buf;
struct ifreq *ifcu_req;
} ifc_ifcu;
};
#define ifc_buf ifc_ifcu.ifcu_buf /* Buffer address. */
#define ifc_req ifc_ifcu.ifcu_req /* Array of structures. */
__BEGIN_DECLS
/* Convert an interface name to an index, and vice versa. */
extern unsigned int if_nametoindex (__const char *__ifname) __THROW;
extern char *if_indextoname (unsigned int __ifindex, char *__ifname) __THROW;
/* Return a list of all interfaces and their indices. */
struct if_nameindex
{
unsigned int if_index; /* 1, 2, ... */
char *if_name; /* null terminated name: "eth0", ... */
};
extern struct if_nameindex *if_nameindex (void) __THROW;
/* Free the data returned from if_nameindex. */
extern void if_freenameindex (struct if_nameindex *__ptr) __THROW;
__END_DECLS
#endif /* net/if.h */
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