233dcce118
o add IFCAP_TSO[46] for drivers to announce this capability for IPv4 and IPv6 o add CSUM_TSO flag to mbuf pkthdr csum_flags field o add tso_segsz field to mbuf pkthdr o enhance ip_output() packet length check to allow for large TSO packets o extend tcp_maxmtu[46]() with a flag pointer to pass interface capabilities o adjust all callers of tcp_maxmtu[46]() accordingly Discussed on: -current, -net Sponsored by: TCP/IP Optimization Fundraise 2005
452 lines
16 KiB
C
452 lines
16 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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* 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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#include <sys/cdefs.h>
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#ifdef _KERNEL
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#include <sys/queue.h>
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#endif
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#if __BSD_VISIBLE
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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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#endif
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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 IF_NAMESIZE 16
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#if __BSD_VISIBLE
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#define IFNAMSIZ IF_NAMESIZE
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#define IF_MAXUNIT 0x7fff /* historical value */
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#endif
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#if __BSD_VISIBLE
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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_link_state; /* current link state */
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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_char ifi_datalen; /* length of this data struct */
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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, see IFCAP */
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time_t ifi_epoch; /* uptime at attach or stat reset */
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struct timeval ifi_lastchange; /* time of last administrative change */
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};
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/*-
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* Interface flags are of two types: network stack owned flags, and driver
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* owned flags. Historically, these values were stored in the same ifnet
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* flags field, but with the advent of fine-grained locking, they have been
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* broken out such that the network stack is responsible for synchronizing
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* the stack-owned fields, and the device driver the device-owned fields.
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* Both halves can perform lockless reads of the other half's field, subject
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* to accepting the involved races.
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*
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* Both sets of flags come from the same number space, and should not be
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* permitted to conflict, as they are exposed to user space via a single
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* field.
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*
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* The following symbols identify read and write requirements for fields:
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*
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* (i) if_flags field set by device driver before attach, read-only there
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* after.
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* (n) if_flags field written only by the network stack, read by either the
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* stack or driver.
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* (d) if_drv_flags field written only by the device driver, read by either
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* the stack or driver.
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*/
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#define IFF_UP 0x1 /* (n) interface is up */
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#define IFF_BROADCAST 0x2 /* (i) broadcast address valid */
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#define IFF_DEBUG 0x4 /* (n) turn on debugging */
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#define IFF_LOOPBACK 0x8 /* (i) is a loopback net */
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#define IFF_POINTOPOINT 0x10 /* (i) is a point-to-point link */
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#define IFF_SMART 0x20 /* (i) interface manages own routes */
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#define IFF_DRV_RUNNING 0x40 /* (d) resources allocated */
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#define IFF_NOARP 0x80 /* (n) no address resolution protocol */
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#define IFF_PROMISC 0x100 /* (n) receive all packets */
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#define IFF_ALLMULTI 0x200 /* (n) receive all multicast packets */
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#define IFF_DRV_OACTIVE 0x400 /* (d) tx hardware queue is full */
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#define IFF_SIMPLEX 0x800 /* (i) 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 /* (i) supports multicast */
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/* 0x10000 */
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#define IFF_PPROMISC 0x20000 /* (n) user-requested promisc mode */
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#define IFF_MONITOR 0x40000 /* (n) user-requested monitor mode */
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#define IFF_STATICARP 0x80000 /* (n) static ARP */
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#define IFF_NEEDSGIANT 0x100000 /* (i) hold Giant over if_start calls */
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/*
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* Old names for driver flags so that user space tools can continue to use
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* the old (portable) names.
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*/
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#ifndef _KERNEL
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#define IFF_RUNNING IFF_DRV_RUNNING
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#define IFF_OACTIVE IFF_DRV_OACTIVE
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#endif
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/* flags set internally only: */
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#define IFF_CANTCHANGE \
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(IFF_BROADCAST|IFF_POINTOPOINT|IFF_DRV_RUNNING|IFF_DRV_OACTIVE|\
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IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART|IFF_PROMISC)
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/*
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* Values for if_link_state.
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*/
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#define LINK_STATE_UNKNOWN 0 /* link invalid/unknown */
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#define LINK_STATE_DOWN 1 /* link is down */
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#define LINK_STATE_UP 2 /* link is up */
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/*
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* Some convenience macros used for setting ifi_baudrate.
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* XXX 1000 vs. 1024? --thorpej@netbsd.org
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*/
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#define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */
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#define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */
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#define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */
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/*
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* Capabilities that interfaces can advertise.
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*
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* struct ifnet.if_capabilities
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* contains the optional features & capabilities a particular interface
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* supports (not only the driver but also the detected hw revision).
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* Capabilities are defined by IFCAP_* below.
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* struct ifnet.if_capenabled
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* contains the enabled (either by default or through ifconfig) optional
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* features & capabilities on this interface.
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* Capabilities are defined by IFCAP_* below.
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* struct if_data.ifi_hwassist in mbuf CSUM_ flag form, controlled by above
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* contains the enabled optional feature & capabilites that can be used
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* individually per packet and are specified in the mbuf pkthdr.csum_flags
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* field. IFCAP_* and CSUM_* do not match one to one and CSUM_* may be
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* more detailed or differenciated that IFCAP_*.
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* Hwassist features are defined CSUM_* in sys/mbuf.h
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*/
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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_VLAN_MTU 0x0008 /* VLAN-compatible MTU */
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#define IFCAP_VLAN_HWTAGGING 0x0010 /* hardware VLAN tag support */
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#define IFCAP_JUMBO_MTU 0x0020 /* 9000 byte MTU supported */
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#define IFCAP_POLLING 0x0040 /* driver supports polling */
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#define IFCAP_VLAN_HWCSUM 0x0080 /* can do IFCAP_HWCSUM on VLANs */
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#define IFCAP_TSO4 0x0100 /* can do TCP Segmentation Offload */
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#define IFCAP_TSO6 0x0200 /* can do TCP6 Segmentation Offload */
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#define IFCAP_HWCSUM (IFCAP_RXCSUM | IFCAP_TXCSUM)
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#define IFCAP_TSO (IFCAP_TSO4 | IFCAP_TSO6)
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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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struct ifdrv {
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char ifd_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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unsigned long ifd_cmd;
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size_t ifd_len;
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void *ifd_data;
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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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#if defined (__amd64__) || defined (COMPAT_32BIT)
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struct ifconf32 {
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int ifc_len; /* size of associated buffer */
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union {
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u_int ifcu_buf;
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u_int ifcu_req;
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} ifc_ifcu;
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};
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#endif
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/*
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* interface groups
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*/
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#define IFG_ALL "all" /* group contains all interfaces */
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/* XXX: will we implement this? */
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#define IFG_EGRESS "egress" /* if(s) default route(s) point to */
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struct ifg_req {
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union {
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char ifgrqu_group[IFNAMSIZ];
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char ifgrqu_member[IFNAMSIZ];
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} ifgrq_ifgrqu;
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#define ifgrq_group ifgrq_ifgrqu.ifgrqu_group
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#define ifgrq_member ifgrq_ifgrqu.ifgrqu_member
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};
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/*
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* Used to lookup groups for an interface
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*/
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struct ifgroupreq {
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char ifgr_name[IFNAMSIZ];
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u_int ifgr_len;
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union {
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char ifgru_group[IFNAMSIZ];
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struct ifg_req *ifgru_groups;
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} ifgr_ifgru;
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#define ifgr_group ifgr_ifgru.ifgru_group
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#define ifgr_groups ifgr_ifgru.ifgru_groups
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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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#endif /* __BSD_VISIBLE */
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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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unsigned 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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void if_freenameindex(struct if_nameindex *);
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char *if_indextoname(unsigned int, char *);
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struct if_nameindex *if_nameindex(void);
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unsigned int if_nametoindex(const char *);
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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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