if.h
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- /* net/if.h -- declarations for inquiring about network interfaces
- Copyright (C) 1997,98,99,2000,2001 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; 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>
- #ifdef __USE_MISC
- # include <sys/types.h>
- # include <sys/socket.h>
- #endif
- /* Length of interface name. */
- #define IF_NAMESIZE 16
- struct if_nameindex
- {
- unsigned int if_index; /* 1, 2, ... */
- char *if_name; /* null terminated name: "eth0", ... */
- };
- #ifdef __USE_MISC
- /* 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_MASTER = 0x400, /* Master of a load balancer. */
- # define IFF_MASTER IFF_MASTER
- IFF_SLAVE = 0x800, /* Slave of a load balancer. */
- # define IFF_SLAVE IFF_SLAVE
- IFF_MULTICAST = 0x1000, /* Supports multicast. */
- # define IFF_MULTICAST IFF_MULTICAST
- IFF_PORTSEL = 0x2000, /* Can set media type. */
- # define IFF_PORTSEL IFF_PORTSEL
- IFF_AUTOMEDIA = 0x4000 /* Auto media select active. */
- # define IFF_AUTOMEDIA IFF_AUTOMEDIA
- };
- /* 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 iface *ifa_ifp; /* Back-pointer to interface. */
- struct ifaddr *ifa_next; /* Next address for interface. */
- };
- # define ifa_broadaddr ifa_ifu.ifu_broadaddr /* broadcast address */
- # define ifa_dstaddr ifa_ifu.ifu_dstaddr /* other end of link */
- /* Device mapping structure. I'd just gone off and designed a
- beautiful scheme using only loadable modules with arguments for
- driver options and along come the PCMCIA people 8)
- Ah well. The get() side of this is good for WDSETUP, and it'll be
- handy for debugging things. The set side is fine for now and being
- very small might be worth keeping for clean configuration. */
- struct ifmap
- {
- unsigned long int mem_start;
- unsigned long int mem_end;
- unsigned short int base_addr;
- unsigned char irq;
- unsigned char dma;
- unsigned char port;
- /* 3 bytes spare */
- };
- /* 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 IF_NAMESIZE
- 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;
- int ifru_mtu;
- struct ifmap ifru_map;
- char ifru_slave[IFNAMSIZ]; /* Just fits the size */
- char ifru_newname[IFNAMSIZ];
- __caddr_t ifru_data;
- } ifr_ifru;
- };
- # 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_map ifr_ifru.ifru_map /* device map */
- # 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_qlen ifr_ifru.ifru_ivalue /* queue length */
- # define ifr_newname ifr_ifru.ifru_newname /* New name */
- # define _IOT_ifreq _IOT(_IOTS(char),IFNAMSIZ,_IOTS(char),16,0,0)
- # define _IOT_ifreq_short _IOT(_IOTS(char),IFNAMSIZ,_IOTS(short),1,0,0)
- # define _IOT_ifreq_int _IOT(_IOTS(char),IFNAMSIZ,_IOTS(int),1,0,0)
- /* 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. */
- # define _IOT_ifconf _IOT(_IOTS(struct ifconf),1,0,0,0,0) /* not right */
- #endif /* Misc. */
- __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. */
- 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 */