fe267a5590
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
547 lines
13 KiB
C
547 lines
13 KiB
C
/* $NetBSD: if_media.c,v 1.1 1997/03/17 02:55:15 thorpej Exp $ */
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/* $FreeBSD$ */
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/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1997
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* Jonathan Stone and Jason R. Thorpe. All rights reserved.
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*
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* This software is derived from information provided by Matt Thomas.
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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 Jonathan Stone
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* and Jason R. Thorpe for the NetBSD Project.
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* 4. The names of the authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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/*
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* BSD/OS-compatible network interface media selection.
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*
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* Where it is safe to do so, this code strays slightly from the BSD/OS
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* design. Software which uses the API (device drivers, basically)
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* shouldn't notice any difference.
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*
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* Many thanks to Matt Thomas for providing the information necessary
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* to implement this interface.
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*/
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#include "opt_ifmedia.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_media.h>
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/*
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* Compile-time options:
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* IFMEDIA_DEBUG:
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* turn on implementation-level debug printfs.
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* Useful for debugging newly-ported drivers.
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*/
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static struct ifmedia_entry *ifmedia_match(struct ifmedia *ifm,
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int flags, int mask);
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#ifdef IFMEDIA_DEBUG
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#include <net/if_var.h>
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int ifmedia_debug = 0;
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SYSCTL_INT(_debug, OID_AUTO, ifmedia, CTLFLAG_RW, &ifmedia_debug,
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0, "if_media debugging msgs");
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static void ifmedia_printword(int);
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#endif
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/*
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* Initialize if_media struct for a specific interface instance.
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*/
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void
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ifmedia_init(ifm, dontcare_mask, change_callback, status_callback)
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struct ifmedia *ifm;
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int dontcare_mask;
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ifm_change_cb_t change_callback;
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ifm_stat_cb_t status_callback;
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{
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LIST_INIT(&ifm->ifm_list);
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ifm->ifm_cur = NULL;
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ifm->ifm_media = 0;
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ifm->ifm_mask = dontcare_mask; /* IF don't-care bits */
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ifm->ifm_change = change_callback;
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ifm->ifm_status = status_callback;
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}
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void
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ifmedia_removeall(ifm)
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struct ifmedia *ifm;
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{
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struct ifmedia_entry *entry;
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for (entry = LIST_FIRST(&ifm->ifm_list); entry;
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entry = LIST_FIRST(&ifm->ifm_list)) {
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LIST_REMOVE(entry, ifm_list);
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free(entry, M_IFADDR);
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}
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ifm->ifm_cur = NULL;
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}
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/*
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* Add a media configuration to the list of supported media
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* for a specific interface instance.
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*/
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void
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ifmedia_add(ifm, mword, data, aux)
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struct ifmedia *ifm;
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int mword;
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int data;
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void *aux;
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{
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struct ifmedia_entry *entry;
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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if (ifm == NULL) {
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printf("ifmedia_add: null ifm\n");
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return;
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}
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printf("Adding entry for ");
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ifmedia_printword(mword);
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}
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#endif
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entry = malloc(sizeof(*entry), M_IFADDR, M_NOWAIT);
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if (entry == NULL)
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panic("ifmedia_add: can't malloc entry");
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entry->ifm_media = mword;
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entry->ifm_data = data;
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entry->ifm_aux = aux;
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LIST_INSERT_HEAD(&ifm->ifm_list, entry, ifm_list);
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}
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/*
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* Add an array of media configurations to the list of
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* supported media for a specific interface instance.
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*/
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void
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ifmedia_list_add(ifm, lp, count)
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struct ifmedia *ifm;
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struct ifmedia_entry *lp;
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int count;
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{
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int i;
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for (i = 0; i < count; i++)
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ifmedia_add(ifm, lp[i].ifm_media, lp[i].ifm_data,
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lp[i].ifm_aux);
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}
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/*
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* Set the default active media.
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*
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* Called by device-specific code which is assumed to have already
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* selected the default media in hardware. We do _not_ call the
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* media-change callback.
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*/
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void
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ifmedia_set(ifm, target)
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struct ifmedia *ifm;
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int target;
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{
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struct ifmedia_entry *match;
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match = ifmedia_match(ifm, target, ifm->ifm_mask);
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if (match == NULL) {
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printf("ifmedia_set: no match for 0x%x/0x%x\n",
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target, ~ifm->ifm_mask);
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panic("ifmedia_set");
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}
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ifm->ifm_cur = match;
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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printf("ifmedia_set: target ");
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ifmedia_printword(target);
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printf("ifmedia_set: setting to ");
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ifmedia_printword(ifm->ifm_cur->ifm_media);
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}
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#endif
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}
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/*
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* Given a media word, return one suitable for an application
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* using the original encoding.
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*/
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static int
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compat_media(int media)
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{
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if (IFM_TYPE(media) == IFM_ETHER && IFM_SUBTYPE(media) > IFM_OTHER) {
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media &= ~(IFM_ETH_XTYPE|IFM_TMASK);
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media |= IFM_OTHER;
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}
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return (media);
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}
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/*
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* Device-independent media ioctl support function.
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*/
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int
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ifmedia_ioctl(ifp, ifr, ifm, cmd)
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struct ifnet *ifp;
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struct ifreq *ifr;
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struct ifmedia *ifm;
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u_long cmd;
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{
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struct ifmedia_entry *match;
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struct ifmediareq *ifmr = (struct ifmediareq *) ifr;
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int error = 0;
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if (ifp == NULL || ifr == NULL || ifm == NULL)
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return(EINVAL);
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switch (cmd) {
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/*
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* Set the current media.
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*/
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case SIOCSIFMEDIA:
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{
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struct ifmedia_entry *oldentry;
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int oldmedia;
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int newmedia = ifr->ifr_media;
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match = ifmedia_match(ifm, newmedia, ifm->ifm_mask);
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if (match == NULL) {
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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printf(
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"ifmedia_ioctl: no media found for 0x%x\n",
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newmedia);
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}
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#endif
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return (ENXIO);
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}
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/*
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* If no change, we're done.
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* XXX Automedia may invole software intervention.
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* Keep going in case the connected media changed.
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* Similarly, if best match changed (kernel debugger?).
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*/
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if ((IFM_SUBTYPE(newmedia) != IFM_AUTO) &&
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(newmedia == ifm->ifm_media) &&
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(match == ifm->ifm_cur))
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return 0;
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/*
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* We found a match, now make the driver switch to it.
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* Make sure to preserve our old media type in case the
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* driver can't switch.
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*/
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#ifdef IFMEDIA_DEBUG
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if (ifmedia_debug) {
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printf("ifmedia_ioctl: switching %s to ",
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ifp->if_xname);
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ifmedia_printword(match->ifm_media);
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}
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#endif
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oldentry = ifm->ifm_cur;
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oldmedia = ifm->ifm_media;
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ifm->ifm_cur = match;
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ifm->ifm_media = newmedia;
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error = (*ifm->ifm_change)(ifp);
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if (error) {
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ifm->ifm_cur = oldentry;
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ifm->ifm_media = oldmedia;
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}
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break;
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}
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/*
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* Get list of available media and current media on interface.
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*/
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case SIOCGIFMEDIA:
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case SIOCGIFXMEDIA:
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{
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struct ifmedia_entry *ep;
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int i;
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if (ifmr->ifm_count < 0)
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return (EINVAL);
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if (cmd == SIOCGIFMEDIA) {
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ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
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compat_media(ifm->ifm_cur->ifm_media) : IFM_NONE;
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} else {
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ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
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ifm->ifm_cur->ifm_media : IFM_NONE;
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}
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ifmr->ifm_mask = ifm->ifm_mask;
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ifmr->ifm_status = 0;
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(*ifm->ifm_status)(ifp, ifmr);
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/*
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* If there are more interfaces on the list, count
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* them. This allows the caller to set ifmr->ifm_count
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* to 0 on the first call to know how much space to
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* allocate.
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*/
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i = 0;
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LIST_FOREACH(ep, &ifm->ifm_list, ifm_list)
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if (i++ < ifmr->ifm_count) {
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error = copyout(&ep->ifm_media,
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ifmr->ifm_ulist + i - 1, sizeof(int));
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if (error)
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break;
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}
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if (error == 0 && i > ifmr->ifm_count)
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error = ifmr->ifm_count ? E2BIG : 0;
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ifmr->ifm_count = i;
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break;
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}
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default:
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return (EINVAL);
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}
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return (error);
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}
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/*
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* Find media entry matching a given ifm word.
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*
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*/
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static struct ifmedia_entry *
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ifmedia_match(ifm, target, mask)
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struct ifmedia *ifm;
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int target;
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int mask;
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{
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struct ifmedia_entry *match, *next;
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match = NULL;
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mask = ~mask;
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LIST_FOREACH(next, &ifm->ifm_list, ifm_list) {
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if ((next->ifm_media & mask) == (target & mask)) {
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#if defined(IFMEDIA_DEBUG) || defined(DIAGNOSTIC)
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if (match) {
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printf("ifmedia_match: multiple match for "
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"0x%x/0x%x\n", target, mask);
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}
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#endif
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match = next;
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}
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}
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return match;
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}
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/*
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* Compute the interface `baudrate' from the media, for the interface
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* metrics (used by routing daemons).
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*/
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static const struct ifmedia_baudrate ifmedia_baudrate_descriptions[] =
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IFM_BAUDRATE_DESCRIPTIONS;
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uint64_t
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ifmedia_baudrate(int mword)
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{
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int i;
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for (i = 0; ifmedia_baudrate_descriptions[i].ifmb_word != 0; i++) {
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if (IFM_TYPE_MATCH(mword, ifmedia_baudrate_descriptions[i].ifmb_word))
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return (ifmedia_baudrate_descriptions[i].ifmb_baudrate);
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}
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/* Not known. */
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return (0);
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}
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#ifdef IFMEDIA_DEBUG
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struct ifmedia_description ifm_type_descriptions[] =
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IFM_TYPE_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
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IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
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IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
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IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
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IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_fddi_descriptions[] =
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IFM_SUBTYPE_FDDI_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
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IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
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IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
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IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
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IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_atm_descriptions[] =
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IFM_SUBTYPE_ATM_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
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IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
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struct ifmedia_description ifm_subtype_shared_descriptions[] =
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IFM_SUBTYPE_SHARED_DESCRIPTIONS;
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struct ifmedia_description ifm_shared_option_descriptions[] =
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IFM_SHARED_OPTION_DESCRIPTIONS;
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struct ifmedia_type_to_subtype {
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struct ifmedia_description *subtypes;
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struct ifmedia_description *options;
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struct ifmedia_description *modes;
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};
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/* must be in the same order as IFM_TYPE_DESCRIPTIONS */
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struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
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{
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&ifm_subtype_ethernet_descriptions[0],
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&ifm_subtype_ethernet_option_descriptions[0],
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NULL,
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},
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{
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&ifm_subtype_tokenring_descriptions[0],
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&ifm_subtype_tokenring_option_descriptions[0],
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NULL,
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},
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{
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&ifm_subtype_fddi_descriptions[0],
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&ifm_subtype_fddi_option_descriptions[0],
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NULL,
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},
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{
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&ifm_subtype_ieee80211_descriptions[0],
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&ifm_subtype_ieee80211_option_descriptions[0],
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&ifm_subtype_ieee80211_mode_descriptions[0]
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},
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{
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&ifm_subtype_atm_descriptions[0],
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&ifm_subtype_atm_option_descriptions[0],
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NULL,
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},
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};
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/*
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* print a media word.
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*/
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static void
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ifmedia_printword(ifmw)
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int ifmw;
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{
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struct ifmedia_description *desc;
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struct ifmedia_type_to_subtype *ttos;
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int seen_option = 0;
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/* Find the top-level interface type. */
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for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
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desc->ifmt_string != NULL; desc++, ttos++)
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if (IFM_TYPE(ifmw) == desc->ifmt_word)
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break;
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if (desc->ifmt_string == NULL) {
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printf("<unknown type>\n");
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return;
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}
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printf("%s", desc->ifmt_string);
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/* Any mode. */
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for (desc = ttos->modes; desc && desc->ifmt_string != NULL; desc++)
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if (IFM_MODE(ifmw) == desc->ifmt_word) {
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if (desc->ifmt_string != NULL)
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printf(" mode %s", desc->ifmt_string);
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break;
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}
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/*
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* Check for the shared subtype descriptions first, then the
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* type-specific ones.
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*/
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for (desc = ifm_subtype_shared_descriptions;
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desc->ifmt_string != NULL; desc++)
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if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
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goto got_subtype;
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for (desc = ttos->subtypes; desc->ifmt_string != NULL; desc++)
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if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
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break;
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if (desc->ifmt_string == NULL) {
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printf(" <unknown subtype>\n");
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return;
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}
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got_subtype:
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printf(" %s", desc->ifmt_string);
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/*
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* Look for shared options.
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*/
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for (desc = ifm_shared_option_descriptions;
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desc->ifmt_string != NULL; desc++) {
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if (ifmw & desc->ifmt_word) {
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if (seen_option == 0)
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printf(" <");
|
|
printf("%s%s", seen_option++ ? "," : "",
|
|
desc->ifmt_string);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Look for subtype-specific options.
|
|
*/
|
|
for (desc = ttos->options; desc->ifmt_string != NULL; desc++) {
|
|
if (ifmw & desc->ifmt_word) {
|
|
if (seen_option == 0)
|
|
printf(" <");
|
|
printf("%s%s", seen_option++ ? "," : "",
|
|
desc->ifmt_string);
|
|
}
|
|
}
|
|
printf("%s\n", seen_option ? ">" : "");
|
|
}
|
|
#endif /* IFMEDIA_DEBUG */
|