d61cac74b0
Setting this flag on an ethernet interface blocks transmission of packets and discards incoming packets after BPF processing. This is useful if you want to monitor network trafic but not interact with the network in question. Sponsored by: http://www.babeltech.dk
347 lines
12 KiB
C
347 lines
12 KiB
C
/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NET_IF_H_
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#define _NET_IF_H_
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#ifdef _KERNEL
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#include <sys/queue.h>
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#endif
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/*
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* <net/if.h> does not depend on <sys/time.h> on most other systems. This
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* helps userland compatibility. (struct timeval ifi_lastchange)
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*/
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#ifndef _KERNEL
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#include <sys/time.h>
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#endif
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struct ifnet;
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/*
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* Length of interface external name, including terminating '\0'.
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* Note: this is the same size as a generic device's external name.
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*/
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#define IFNAMSIZ 16
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#define IF_NAMESIZE IFNAMSIZ
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#define IF_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */
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#ifdef _KERNEL
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/*
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* Structure describing a `cloning' interface.
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*/
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struct if_clone {
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LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */
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const char *ifc_name; /* name of device, e.g. `gif' */
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size_t ifc_namelen; /* length of name */
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int ifc_minifs; /* minimum number of interfaces */
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int ifc_maxunit; /* maximum unit number */
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unsigned char *ifc_units; /* bitmap to handle units */
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int ifc_bmlen; /* bitmap length */
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int (*ifc_create)(struct if_clone *, int);
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void (*ifc_destroy)(struct ifnet *);
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};
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#define IF_CLONE_INITIALIZER(name, create, destroy, minifs, maxunit) \
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{ { 0 }, name, sizeof(name) - 1, minifs, maxunit, NULL, 0, create, destroy }
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#endif
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/*
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* Structure used to query names of interface cloners.
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*/
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struct if_clonereq {
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int ifcr_total; /* total cloners (out) */
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int ifcr_count; /* room for this many in user buffer */
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char *ifcr_buffer; /* buffer for cloner names */
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};
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/*
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* Structure describing information about an interface
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* which may be of interest to management entities.
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*/
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struct if_data {
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/* generic interface information */
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u_char ifi_type; /* ethernet, tokenring, etc */
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u_char ifi_physical; /* e.g., AUI, Thinnet, 10base-T, etc */
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u_char ifi_addrlen; /* media address length */
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u_char ifi_hdrlen; /* media header length */
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u_char ifi_recvquota; /* polling quota for receive intrs */
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u_char ifi_xmitquota; /* polling quota for xmit intrs */
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u_long ifi_mtu; /* maximum transmission unit */
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u_long ifi_metric; /* routing metric (external only) */
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u_long ifi_baudrate; /* linespeed */
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/* volatile statistics */
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u_long ifi_ipackets; /* packets received on interface */
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u_long ifi_ierrors; /* input errors on interface */
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u_long ifi_opackets; /* packets sent on interface */
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u_long ifi_oerrors; /* output errors on interface */
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u_long ifi_collisions; /* collisions on csma interfaces */
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u_long ifi_ibytes; /* total number of octets received */
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u_long ifi_obytes; /* total number of octets sent */
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u_long ifi_imcasts; /* packets received via multicast */
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u_long ifi_omcasts; /* packets sent via multicast */
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u_long ifi_iqdrops; /* dropped on input, this interface */
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u_long ifi_noproto; /* destined for unsupported protocol */
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u_long ifi_hwassist; /* HW offload capabilities */
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u_long ifi_unused; /* XXX was ifi_xmittiming */
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struct timeval ifi_lastchange; /* time of last administrative change */
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};
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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 point-to-point link */
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#define IFF_SMART 0x20 /* interface manages own routes */
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#define IFF_RUNNING 0x40 /* resources allocated */
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#define IFF_NOARP 0x80 /* no address resolution 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_OACTIVE 0x400 /* transmission in progress */
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#define IFF_SIMPLEX 0x800 /* can't hear own transmissions */
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#define IFF_LINK0 0x1000 /* per link layer defined bit */
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#define IFF_LINK1 0x2000 /* per link layer defined bit */
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#define IFF_LINK2 0x4000 /* per link layer defined bit */
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#define IFF_ALTPHYS IFF_LINK2 /* use alternate physical connection */
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#define IFF_MULTICAST 0x8000 /* supports multicast */
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#define IFF_POLLING 0x10000 /* Interface is in polling mode. */
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#define IFF_PPROMISC 0x20000 /* user-requested promisc mode */
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#define IFF_MONITOR 0x40000 /* user-requested monitor mode */
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/* flags set internally only: */
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#define IFF_CANTCHANGE \
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(IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
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IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART|IFF_PROMISC|\
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IFF_POLLING)
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/* Capabilities that interfaces can advertise. */
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#define IFCAP_RXCSUM 0x0001 /* can offload checksum on RX */
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#define IFCAP_TXCSUM 0x0002 /* can offload checksum on TX */
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#define IFCAP_NETCONS 0x0004 /* can be a network console */
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#define IFCAP_HWCSUM (IFCAP_RXCSUM | IFCAP_TXCSUM)
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#define IFQ_MAXLEN 50
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#define IFNET_SLOWHZ 1 /* granularity is 1 second */
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/*
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* Message format for use in obtaining information about interfaces
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* from getkerninfo and the routing socket
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*/
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struct if_msghdr {
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u_short ifm_msglen; /* to skip over non-understood messages */
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u_char ifm_version; /* future binary compatibility */
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u_char ifm_type; /* message type */
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int ifm_addrs; /* like rtm_addrs */
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int ifm_flags; /* value of if_flags */
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u_short ifm_index; /* index for associated ifp */
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struct if_data ifm_data;/* statistics and other data about if */
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};
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/*
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* Message format for use in obtaining information about interface addresses
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* from getkerninfo and the routing socket
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*/
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struct ifa_msghdr {
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u_short ifam_msglen; /* to skip over non-understood messages */
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u_char ifam_version; /* future binary compatibility */
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u_char ifam_type; /* message type */
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int ifam_addrs; /* like rtm_addrs */
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int ifam_flags; /* value of ifa_flags */
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u_short ifam_index; /* index for associated ifp */
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int ifam_metric; /* value of ifa_metric */
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};
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/*
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* Message format for use in obtaining information about multicast addresses
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* from the routing socket
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*/
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struct ifma_msghdr {
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u_short ifmam_msglen; /* to skip over non-understood messages */
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u_char ifmam_version; /* future binary compatibility */
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u_char ifmam_type; /* message type */
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int ifmam_addrs; /* like rtm_addrs */
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int ifmam_flags; /* value of ifa_flags */
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u_short ifmam_index; /* index for associated ifp */
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};
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/*
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* Message format announcing the arrival or departure of a network interface.
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*/
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struct if_announcemsghdr {
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u_short ifan_msglen; /* to skip over non-understood messages */
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u_char ifan_version; /* future binary compatibility */
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u_char ifan_type; /* message type */
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u_short ifan_index; /* index for associated ifp */
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char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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u_short ifan_what; /* what type of announcement */
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};
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#define IFAN_ARRIVAL 0 /* interface arrival */
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#define IFAN_DEPARTURE 1 /* interface departure */
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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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char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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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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short ifru_flags[2];
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short ifru_index;
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int ifru_metric;
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int ifru_mtu;
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int ifru_phys;
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int ifru_media;
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caddr_t ifru_data;
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int ifru_cap[2];
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} ifr_ifru;
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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-to-p link */
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#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
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#define ifr_flags ifr_ifru.ifru_flags[0] /* flags (low 16 bits) */
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#define ifr_flagshigh ifr_ifru.ifru_flags[1] /* flags (high 16 bits) */
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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_phys ifr_ifru.ifru_phys /* physical wire */
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#define ifr_media ifr_ifru.ifru_media /* physical media */
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#define ifr_data ifr_ifru.ifru_data /* for use by interface */
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#define ifr_reqcap ifr_ifru.ifru_cap[0] /* requested capabilities */
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#define ifr_curcap ifr_ifru.ifru_cap[1] /* current capabilities */
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#define ifr_index ifr_ifru.ifru_index /* interface index */
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};
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#define _SIZEOF_ADDR_IFREQ(ifr) \
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((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
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(sizeof(struct ifreq) - sizeof(struct sockaddr) + \
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(ifr).ifr_addr.sa_len) : sizeof(struct ifreq))
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struct ifaliasreq {
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char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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struct sockaddr ifra_addr;
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struct sockaddr ifra_broadaddr;
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struct sockaddr ifra_mask;
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};
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struct ifmediareq {
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char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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int ifm_current; /* current media options */
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int ifm_mask; /* don't care mask */
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int ifm_status; /* media status */
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int ifm_active; /* active options */
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int ifm_count; /* # entries in ifm_ulist array */
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int *ifm_ulist; /* media words */
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};
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/*
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* Structure used to retrieve aux status data from interfaces.
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* Kernel suppliers to this interface should respect the formatting
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* needed by ifconfig(8): each line starts with a TAB and ends with
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* a newline. The canonical example to copy and paste is in if_tun.c.
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*/
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#define IFSTATMAX 800 /* 10 lines of text */
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struct ifstat {
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char ifs_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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char ascii[IFSTATMAX + 1];
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};
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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 associated buffer */
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union {
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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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#define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
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#define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
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};
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/*
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* Structure for SIOC[AGD]LIFADDR
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*/
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struct if_laddrreq {
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char iflr_name[IFNAMSIZ];
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u_int flags;
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#define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */
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u_int prefixlen; /* in/out */
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struct sockaddr_storage addr; /* in/out */
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struct sockaddr_storage dstaddr; /* out */
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};
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#ifdef _KERNEL
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_IFADDR);
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MALLOC_DECLARE(M_IFMADDR);
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#endif
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#endif
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#ifndef _KERNEL
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struct if_nameindex {
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u_int if_index; /* 1, 2, ... */
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char *if_name; /* null terminated name: "le0", ... */
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};
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__BEGIN_DECLS
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u_int if_nametoindex(const char *);
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char *if_indextoname(u_int, char *);
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struct if_nameindex *if_nameindex(void);
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void if_freenameindex(struct if_nameindex *);
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__END_DECLS
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#endif
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#ifdef _KERNEL
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struct thread;
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/* XXX - this should go away soon. */
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#include <net/if_var.h>
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#endif
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#endif /* !_NET_IF_H_ */
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