ad4bb6f888
A number of people have tried to add a wireless interface (in managed mode) to a bridge and then complained that it doesn't work. It cannot work, however, because in 802.11 networks all packets need to be acknowledged and as such need to be sent to the right address. Promiscuous doesn't help here. The wireless address format used for these links has only space for three addresses, the * transmitter, which must be equal to the sender (origin) * receiver (on the wireless medium), which is the AP in the case of managed mode * the recipient (destination), which is on the APs local network segment In an IBSS, it is similar, but the receiver and recipient must match and the third address is used as the BSSID. To avoid such mistakes in the future, disallow adding a wireless interface to a bridge. Felix has recently added a four-address mode to the AP and client side that can be used (after negotiating that it is possible, which must happen out-of-band by setting up both sides) for bridging, so allow that case. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
223 lines
7.8 KiB
C
223 lines
7.8 KiB
C
/*
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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
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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 "__kernel_caddr_t" et al */
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#include <linux/socket.h> /* for "struct sockaddr" et al */
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#include <linux/compiler.h> /* for "__user" et al */
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#define IFNAMSIZ 16
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#define IFALIASZ 256
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#include <linux/hdlc/ioctl.h>
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/* Standard interface flags (netdevice->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 /* interface RFC2863 OPER_UP */
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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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#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_PORTSEL 0x2000 /* can set media type */
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#define IFF_AUTOMEDIA 0x4000 /* auto media select active */
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#define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses*/
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#define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
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#define IFF_DORMANT 0x20000 /* driver signals dormant */
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#define IFF_ECHO 0x40000 /* echo sent packets */
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#define IFF_VOLATILE (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|\
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IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT)
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/* Private (from user) interface flags (netdevice->priv_flags). */
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#define IFF_802_1Q_VLAN 0x1 /* 802.1Q VLAN device. */
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#define IFF_EBRIDGE 0x2 /* Ethernet bridging device. */
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#define IFF_SLAVE_INACTIVE 0x4 /* bonding slave not the curr. active */
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#define IFF_MASTER_8023AD 0x8 /* bonding master, 802.3ad. */
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#define IFF_MASTER_ALB 0x10 /* bonding master, balance-alb. */
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#define IFF_BONDING 0x20 /* bonding master or slave */
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#define IFF_SLAVE_NEEDARP 0x40 /* need ARPs for validation */
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#define IFF_ISATAP 0x80 /* ISATAP interface (RFC4214) */
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#define IFF_MASTER_ARPMON 0x100 /* bonding master, ARP mon in use */
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#define IFF_WAN_HDLC 0x200 /* WAN HDLC device */
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#define IFF_XMIT_DST_RELEASE 0x400 /* dev_hard_start_xmit() is allowed to
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* release skb->dst
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*/
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#define IFF_DONT_BRIDGE 0x800 /* disallow bridging this ether dev */
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#define IF_GET_IFACE 0x0001 /* for querying only */
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#define IF_GET_PROTO 0x0002
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/* For definitions see hdlc.h */
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#define IF_IFACE_V35 0x1000 /* V.35 serial interface */
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#define IF_IFACE_V24 0x1001 /* V.24 serial interface */
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#define IF_IFACE_X21 0x1002 /* X.21 serial interface */
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#define IF_IFACE_T1 0x1003 /* T1 telco serial interface */
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#define IF_IFACE_E1 0x1004 /* E1 telco serial interface */
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#define IF_IFACE_SYNC_SERIAL 0x1005 /* can't be set by software */
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#define IF_IFACE_X21D 0x1006 /* X.21 Dual Clocking (FarSite) */
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/* For definitions see hdlc.h */
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#define IF_PROTO_HDLC 0x2000 /* raw HDLC protocol */
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#define IF_PROTO_PPP 0x2001 /* PPP protocol */
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#define IF_PROTO_CISCO 0x2002 /* Cisco HDLC protocol */
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#define IF_PROTO_FR 0x2003 /* Frame Relay protocol */
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#define IF_PROTO_FR_ADD_PVC 0x2004 /* Create FR PVC */
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#define IF_PROTO_FR_DEL_PVC 0x2005 /* Delete FR PVC */
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#define IF_PROTO_X25 0x2006 /* X.25 */
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#define IF_PROTO_HDLC_ETH 0x2007 /* raw HDLC, Ethernet emulation */
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#define IF_PROTO_FR_ADD_ETH_PVC 0x2008 /* Create FR Ethernet-bridged PVC */
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#define IF_PROTO_FR_DEL_ETH_PVC 0x2009 /* Delete FR Ethernet-bridged PVC */
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#define IF_PROTO_FR_PVC 0x200A /* for reading PVC status */
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#define IF_PROTO_FR_ETH_PVC 0x200B
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#define IF_PROTO_RAW 0x200C /* RAW Socket */
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/* RFC 2863 operational status */
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enum {
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IF_OPER_UNKNOWN,
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IF_OPER_NOTPRESENT,
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IF_OPER_DOWN,
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IF_OPER_LOWERLAYERDOWN,
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IF_OPER_TESTING,
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IF_OPER_DORMANT,
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IF_OPER_UP,
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};
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/* link modes */
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enum {
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IF_LINK_MODE_DEFAULT,
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IF_LINK_MODE_DORMANT, /* limit upward transition to dormant */
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};
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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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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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struct if_settings {
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unsigned int type; /* Type of physical device or protocol */
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unsigned int size; /* Size of the data allocated by the caller */
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union {
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/* {atm/eth/dsl}_settings anyone ? */
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raw_hdlc_proto __user *raw_hdlc;
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cisco_proto __user *cisco;
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fr_proto __user *fr;
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fr_proto_pvc __user *fr_pvc;
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fr_proto_pvc_info __user *fr_pvc_info;
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/* interface settings */
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sync_serial_settings __user *sync;
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te1_settings __user *te1;
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} ifs_ifsu;
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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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#define IFHWADDRLEN 6
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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_ivalue;
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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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char ifru_newname[IFNAMSIZ];
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void __user * ifru_data;
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struct if_settings ifru_settings;
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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_ivalue /* 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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#define ifr_ifindex ifr_ifru.ifru_ivalue /* interface index */
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#define ifr_bandwidth ifr_ifru.ifru_ivalue /* link bandwidth */
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#define ifr_qlen ifr_ifru.ifru_ivalue /* Queue length */
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#define ifr_newname ifr_ifru.ifru_newname /* New name */
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#define ifr_settings ifr_ifru.ifru_settings /* Device/proto settings*/
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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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int ifc_len; /* size of buffer */
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union {
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char __user *ifcu_buf;
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struct ifreq __user *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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