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jcastillo |
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Global definitions for the INET interface module.
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*
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* Version: @(#)if.h 1.0.2 04/18/93
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*
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* Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1982-1988
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* Ross Biro, <bir7@leland.Stanford.Edu>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_IF_H
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#define _LINUX_IF_H
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#include <linux/types.h> /* for "caddr_t" et al */
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#include <linux/socket.h> /* for "struct sockaddr" et al */
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/* Standard interface flags. */
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#define IFF_UP 0x1 /* interface is up */
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#define IFF_BROADCAST 0x2 /* broadcast address valid */
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#define IFF_DEBUG 0x4 /* turn on debugging */
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#define IFF_LOOPBACK 0x8 /* is a loopback net */
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#define IFF_POINTOPOINT 0x10 /* interface is has p-p link */
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#define IFF_NOTRAILERS 0x20 /* avoid use of trailers */
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#define IFF_RUNNING 0x40 /* resources allocated */
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#define IFF_NOARP 0x80 /* no ARP protocol */
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#define IFF_PROMISC 0x100 /* receive all packets */
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/* Not supported */
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#define IFF_ALLMULTI 0x200 /* receive all multicast packets*/
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#define IFF_MASTER 0x400 /* master of a load balancer */
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#define IFF_SLAVE 0x800 /* slave of a load balancer */
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#define IFF_MULTICAST 0x1000 /* Supports multicast */
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#define IFF_SOFTHEADERS 0x2000 /* Device cannot construct headers
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* until broadcast time. Therefore
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* SOCK_PACKET must call header
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* construction. Private flag.
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* Never visible outside of kernel.
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*/
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/*
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* The ifaddr structure contains information about one address
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* of an interface. They are maintained by the different address
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* families, are allocated and attached when an address is set,
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* and are linked together so all addresses for an interface can
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* be located.
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*/
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struct ifaddr
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{
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struct sockaddr ifa_addr; /* address of interface */
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union {
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struct sockaddr ifu_broadaddr;
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struct sockaddr ifu_dstaddr;
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} ifa_ifu;
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struct iface *ifa_ifp; /* back-pointer to interface */
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struct ifaddr *ifa_next; /* next address for interface */
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};
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#define ifa_broadaddr ifa_ifu.ifu_broadaddr /* broadcast address */
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#define ifa_dstaddr ifa_ifu.ifu_dstaddr /* other end of link */
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/*
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* Device mapping structure. I'd just gone off and designed a
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* beautiful scheme using only loadable modules with arguments
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* for driver options and along come the PCMCIA people 8)
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*
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* Ah well. The get() side of this is good for WDSETUP, and it'll
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* be handy for debugging things. The set side is fine for now and
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* being very small might be worth keeping for clean configuration.
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*/
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struct ifmap
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{
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unsigned long mem_start;
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unsigned long mem_end;
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unsigned short base_addr;
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unsigned char irq;
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unsigned char dma;
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unsigned char port;
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/* 3 bytes spare */
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};
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/*
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* Interface request structure used for socket
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* ioctl's. All interface ioctl's must have parameter
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* definitions which begin with ifr_name. The
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* remainder may be interface specific.
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*/
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struct ifreq
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{
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#define IFHWADDRLEN 6
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#define IFNAMSIZ 16
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union
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{
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char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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} ifr_ifrn;
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union {
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struct sockaddr ifru_addr;
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struct sockaddr ifru_dstaddr;
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struct sockaddr ifru_broadaddr;
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struct sockaddr ifru_netmask;
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struct sockaddr ifru_hwaddr;
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short ifru_flags;
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int ifru_metric;
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int ifru_mtu;
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struct ifmap ifru_map;
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char ifru_slave[IFNAMSIZ]; /* Just fits the size */
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caddr_t ifru_data;
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} ifr_ifru;
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};
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#define ifr_name ifr_ifrn.ifrn_name /* interface name */
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#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
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#define ifr_addr ifr_ifru.ifru_addr /* address */
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#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */
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#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
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#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
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#define ifr_flags ifr_ifru.ifru_flags /* flags */
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#define ifr_metric ifr_ifru.ifru_metric /* metric */
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#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
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#define ifr_map ifr_ifru.ifru_map /* device map */
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#define ifr_slave ifr_ifru.ifru_slave /* slave device */
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#define ifr_data ifr_ifru.ifru_data /* for use by interface */
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/*
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* Structure used in SIOCGIFCONF request.
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* Used to retrieve interface configuration
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* for machine (useful for programs which
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* must know all networks accessible).
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*/
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struct ifconf
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{
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int ifc_len; /* size of buffer */
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union
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{
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caddr_t ifcu_buf;
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struct ifreq *ifcu_req;
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} ifc_ifcu;
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};
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#define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
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#define ifc_req ifc_ifcu.ifcu_req /* array of structures */
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#endif /* _LINUX_IF_H */
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