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Diffstat (limited to 'include/net/if.h')
| -rw-r--r-- | include/net/if.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/include/net/if.h b/include/net/if.h new file mode 100644 index 000000000..3591dded7 --- /dev/null +++ b/include/net/if.h @@ -0,0 +1,191 @@ +/* Copyright (C) 1997, 1998 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_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 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; + int ifru_mtu; + struct ifmap ifru_map; + char ifru_slave[IFNAMSIZ]; /* Just fits the size */ + __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 */ + + +/* 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 __P ((__const char *__ifname)); +extern char *if_indextoname __P ((unsigned int __ifindex, char *__ifname)); + +/* 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 __P ((void)); + +/* Free the data returned from if_nameindex. */ + +extern void if_freenameindex __P ((struct if_nameindex *__ptr)); + +__END_DECLS + +#endif /* net/if.h */ |