1046 lines
25 KiB
C
1046 lines
25 KiB
C
/*
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* Copyright (c) 1980, 1986, 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.c 8.3 (Berkeley) 1/4/94
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* $Id: if.c,v 1.51 1997/08/28 01:17:07 julian Exp $
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/protosw.h>
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#include <sys/kernel.h>
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#include <sys/sockio.h>
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#include <sys/errno.h>
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#include <sys/syslog.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/radix.h>
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/*
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* System initialization
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*/
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static int ifconf __P((int, caddr_t));
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static void ifinit __P((void *));
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static void if_qflush __P((struct ifqueue *));
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static void if_slowtimo __P((void *));
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static void link_rtrequest __P((int, struct rtentry *, struct sockaddr *));
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SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
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int ifqmaxlen = IFQ_MAXLEN;
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struct ifnethead ifnet; /* depend on static init XXX */
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/*
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* Network interface utility routines.
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*
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* Routines with ifa_ifwith* names take sockaddr *'s as
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* parameters.
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*
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* This routine assumes that it will be called at splimp() or higher.
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*/
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/* ARGSUSED*/
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void
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ifinit(dummy)
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void *dummy;
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{
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register struct ifnet *ifp;
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for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next)
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if (ifp->if_snd.ifq_maxlen == 0)
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ifp->if_snd.ifq_maxlen = ifqmaxlen;
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if_slowtimo(0);
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}
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int if_index = 0;
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struct ifaddr **ifnet_addrs;
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/*
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* Attach an interface to the
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* list of "active" interfaces.
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*/
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void
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if_attach(ifp)
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struct ifnet *ifp;
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{
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unsigned socksize, ifasize;
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int namelen, masklen;
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char workbuf[64];
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register struct sockaddr_dl *sdl;
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register struct ifaddr *ifa;
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static int if_indexlim = 8;
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static int inited;
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if (!inited) {
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TAILQ_INIT(&ifnet);
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inited = 1;
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}
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TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
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ifp->if_index = ++if_index;
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/*
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* XXX -
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* The old code would work if the interface passed a pre-existing
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* chain of ifaddrs to this code. We don't trust our callers to
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* properly initialize the tailq, however, so we no longer allow
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* this unlikely case.
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*/
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TAILQ_INIT(&ifp->if_addrhead);
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LIST_INIT(&ifp->if_multiaddrs);
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microtime(&ifp->if_lastchange);
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if (ifnet_addrs == 0 || if_index >= if_indexlim) {
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unsigned n = (if_indexlim <<= 1) * sizeof(ifa);
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struct ifaddr **q = (struct ifaddr **)
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malloc(n, M_IFADDR, M_WAITOK);
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bzero((caddr_t)q, n);
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if (ifnet_addrs) {
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bcopy((caddr_t)ifnet_addrs, (caddr_t)q, n/2);
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free((caddr_t)ifnet_addrs, M_IFADDR);
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}
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ifnet_addrs = q;
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}
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/*
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* create a Link Level name for this device
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*/
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namelen = sprintf(workbuf, "%s%d", ifp->if_name, ifp->if_unit);
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#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
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masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
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socksize = masklen + ifp->if_addrlen;
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#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
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socksize = ROUNDUP(socksize);
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if (socksize < sizeof(*sdl))
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socksize = sizeof(*sdl);
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ifasize = sizeof(*ifa) + 2 * socksize;
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ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
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if (ifa) {
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bzero((caddr_t)ifa, ifasize);
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sdl = (struct sockaddr_dl *)(ifa + 1);
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sdl->sdl_len = socksize;
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sdl->sdl_family = AF_LINK;
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bcopy(workbuf, sdl->sdl_data, namelen);
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sdl->sdl_nlen = namelen;
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sdl->sdl_index = ifp->if_index;
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sdl->sdl_type = ifp->if_type;
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ifnet_addrs[if_index - 1] = ifa;
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ifa->ifa_ifp = ifp;
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ifa->ifa_rtrequest = link_rtrequest;
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ifa->ifa_addr = (struct sockaddr *)sdl;
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sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
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ifa->ifa_netmask = (struct sockaddr *)sdl;
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sdl->sdl_len = masklen;
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while (namelen != 0)
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sdl->sdl_data[--namelen] = 0xff;
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TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
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}
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}
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/*
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* Locate an interface based on a complete address.
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*/
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/*ARGSUSED*/
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struct ifaddr *
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ifa_ifwithaddr(addr)
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register struct sockaddr *addr;
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{
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register struct ifnet *ifp;
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register struct ifaddr *ifa;
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#define equal(a1, a2) \
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(bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
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for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next)
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for (ifa = ifp->if_addrhead.tqh_first; ifa;
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ifa = ifa->ifa_link.tqe_next) {
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if (ifa->ifa_addr->sa_family != addr->sa_family)
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continue;
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if (equal(addr, ifa->ifa_addr))
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return (ifa);
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if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
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equal(ifa->ifa_broadaddr, addr))
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return (ifa);
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}
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return ((struct ifaddr *)0);
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}
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/*
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* Locate the point to point interface with a given destination address.
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*/
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/*ARGSUSED*/
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struct ifaddr *
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ifa_ifwithdstaddr(addr)
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register struct sockaddr *addr;
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{
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register struct ifnet *ifp;
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register struct ifaddr *ifa;
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for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next)
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if (ifp->if_flags & IFF_POINTOPOINT)
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for (ifa = ifp->if_addrhead.tqh_first; ifa;
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ifa = ifa->ifa_link.tqe_next) {
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if (ifa->ifa_addr->sa_family != addr->sa_family)
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continue;
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if (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))
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return (ifa);
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}
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return ((struct ifaddr *)0);
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}
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/*
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* Find an interface on a specific network. If many, choice
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* is most specific found.
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*/
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struct ifaddr *
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ifa_ifwithnet(addr)
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struct sockaddr *addr;
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{
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register struct ifnet *ifp;
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register struct ifaddr *ifa;
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struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
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u_int af = addr->sa_family;
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char *addr_data = addr->sa_data, *cplim;
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/*
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* AF_LINK addresses can be looked up directly by their index number,
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* so do that if we can.
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*/
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if (af == AF_LINK) {
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register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
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if (sdl->sdl_index && sdl->sdl_index <= if_index)
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return (ifnet_addrs[sdl->sdl_index - 1]);
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}
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/*
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* Scan though each interface, looking for ones that have
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* addresses in this address family.
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*/
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for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) {
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for (ifa = ifp->if_addrhead.tqh_first; ifa;
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ifa = ifa->ifa_link.tqe_next) {
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register char *cp, *cp2, *cp3;
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if (ifa->ifa_addr->sa_family != af)
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next: continue;
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if (ifp->if_flags & IFF_POINTOPOINT) {
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/*
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* This is a bit broken as it doesn't
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* take into account that the remote end may
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* be a single node in the network we are
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* looking for.
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* The trouble is that we don't know the
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* netmask for the remote end.
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*/
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if (ifa->ifa_dstaddr != 0
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&& equal(addr, ifa->ifa_dstaddr))
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return (ifa);
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} else {
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/*
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* if we have a special address handler,
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* then use it instead of the generic one.
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*/
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if (ifa->ifa_claim_addr) {
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if ((*ifa->ifa_claim_addr)(ifa, addr)) {
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return (ifa);
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} else {
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continue;
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}
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}
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/*
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* Scan all the bits in the ifa's address.
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* If a bit dissagrees with what we are
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* looking for, mask it with the netmask
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* to see if it really matters.
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* (A byte at a time)
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*/
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if (ifa->ifa_netmask == 0)
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continue;
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cp = addr_data;
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cp2 = ifa->ifa_addr->sa_data;
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cp3 = ifa->ifa_netmask->sa_data;
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cplim = ifa->ifa_netmask->sa_len
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+ (char *)ifa->ifa_netmask;
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while (cp3 < cplim)
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if ((*cp++ ^ *cp2++) & *cp3++)
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goto next; /* next address! */
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/*
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* If the netmask of what we just found
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* is more specific than what we had before
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* (if we had one) then remember the new one
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* before continuing to search
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* for an even better one.
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*/
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if (ifa_maybe == 0 ||
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rn_refines((caddr_t)ifa->ifa_netmask,
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(caddr_t)ifa_maybe->ifa_netmask))
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ifa_maybe = ifa;
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}
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}
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}
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return (ifa_maybe);
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}
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/*
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* Find an interface address specific to an interface best matching
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* a given address.
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*/
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struct ifaddr *
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ifaof_ifpforaddr(addr, ifp)
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struct sockaddr *addr;
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register struct ifnet *ifp;
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{
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register struct ifaddr *ifa;
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register char *cp, *cp2, *cp3;
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register char *cplim;
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struct ifaddr *ifa_maybe = 0;
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u_int af = addr->sa_family;
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if (af >= AF_MAX)
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return (0);
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for (ifa = ifp->if_addrhead.tqh_first; ifa;
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ifa = ifa->ifa_link.tqe_next) {
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if (ifa->ifa_addr->sa_family != af)
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continue;
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if (ifa_maybe == 0)
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ifa_maybe = ifa;
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if (ifa->ifa_netmask == 0) {
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if (equal(addr, ifa->ifa_addr) ||
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(ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
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return (ifa);
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continue;
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}
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if (ifp->if_flags & IFF_POINTOPOINT) {
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if (equal(addr, ifa->ifa_dstaddr))
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return (ifa);
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} else {
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cp = addr->sa_data;
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cp2 = ifa->ifa_addr->sa_data;
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cp3 = ifa->ifa_netmask->sa_data;
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cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
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for (; cp3 < cplim; cp3++)
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if ((*cp++ ^ *cp2++) & *cp3)
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break;
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if (cp3 == cplim)
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return (ifa);
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}
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}
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return (ifa_maybe);
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}
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#include <net/route.h>
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/*
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* Default action when installing a route with a Link Level gateway.
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* Lookup an appropriate real ifa to point to.
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* This should be moved to /sys/net/link.c eventually.
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*/
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static void
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link_rtrequest(cmd, rt, sa)
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int cmd;
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register struct rtentry *rt;
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struct sockaddr *sa;
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{
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register struct ifaddr *ifa;
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struct sockaddr *dst;
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struct ifnet *ifp;
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if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
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((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
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return;
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ifa = ifaof_ifpforaddr(dst, ifp);
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if (ifa) {
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IFAFREE(rt->rt_ifa);
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rt->rt_ifa = ifa;
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ifa->ifa_refcnt++;
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if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
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ifa->ifa_rtrequest(cmd, rt, sa);
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}
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}
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/*
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* Mark an interface down and notify protocols of
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* the transition.
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* NOTE: must be called at splnet or eqivalent.
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*/
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void
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if_down(ifp)
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register struct ifnet *ifp;
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{
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register struct ifaddr *ifa;
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ifp->if_flags &= ~IFF_UP;
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microtime(&ifp->if_lastchange);
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for (ifa = ifp->if_addrhead.tqh_first; ifa;
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ifa = ifa->ifa_link.tqe_next)
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pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
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if_qflush(&ifp->if_snd);
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rt_ifmsg(ifp);
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}
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|
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/*
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* Mark an interface up and notify protocols of
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* the transition.
|
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* NOTE: must be called at splnet or eqivalent.
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*/
|
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void
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if_up(ifp)
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register struct ifnet *ifp;
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{
|
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register struct ifaddr *ifa;
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ifp->if_flags |= IFF_UP;
|
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microtime(&ifp->if_lastchange);
|
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for (ifa = ifp->if_addrhead.tqh_first; ifa;
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ifa = ifa->ifa_link.tqe_next)
|
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pfctlinput(PRC_IFUP, ifa->ifa_addr);
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rt_ifmsg(ifp);
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}
|
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|
|
/*
|
|
* Flush an interface queue.
|
|
*/
|
|
static void
|
|
if_qflush(ifq)
|
|
register struct ifqueue *ifq;
|
|
{
|
|
register struct mbuf *m, *n;
|
|
|
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n = ifq->ifq_head;
|
|
while ((m = n) != 0) {
|
|
n = m->m_act;
|
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m_freem(m);
|
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}
|
|
ifq->ifq_head = 0;
|
|
ifq->ifq_tail = 0;
|
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ifq->ifq_len = 0;
|
|
}
|
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|
|
/*
|
|
* Handle interface watchdog timer routines. Called
|
|
* from softclock, we decrement timers (if set) and
|
|
* call the appropriate interface routine on expiration.
|
|
*/
|
|
static void
|
|
if_slowtimo(arg)
|
|
void *arg;
|
|
{
|
|
register struct ifnet *ifp;
|
|
int s = splimp();
|
|
|
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for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) {
|
|
if (ifp->if_timer == 0 || --ifp->if_timer)
|
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continue;
|
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if (ifp->if_watchdog)
|
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(*ifp->if_watchdog)(ifp);
|
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}
|
|
splx(s);
|
|
timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
|
|
}
|
|
|
|
/*
|
|
* Map interface name to
|
|
* interface structure pointer.
|
|
*/
|
|
struct ifnet *
|
|
ifunit(name)
|
|
register char *name;
|
|
{
|
|
register char *cp;
|
|
register struct ifnet *ifp;
|
|
int unit;
|
|
unsigned len;
|
|
char *ep, c;
|
|
|
|
for (cp = name; cp < name + IFNAMSIZ && *cp; cp++)
|
|
if (*cp >= '0' && *cp <= '9')
|
|
break;
|
|
if (*cp == '\0' || cp == name + IFNAMSIZ)
|
|
return ((struct ifnet *)0);
|
|
/*
|
|
* Save first char of unit, and pointer to it,
|
|
* so we can put a null there to avoid matching
|
|
* initial substrings of interface names.
|
|
*/
|
|
len = cp - name + 1;
|
|
c = *cp;
|
|
ep = cp;
|
|
for (unit = 0; *cp >= '0' && *cp <= '9'; )
|
|
unit = unit * 10 + *cp++ - '0';
|
|
if (*cp != '\0')
|
|
return 0; /* no trailing garbage allowed */
|
|
*ep = 0;
|
|
for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) {
|
|
if (bcmp(ifp->if_name, name, len))
|
|
continue;
|
|
if (unit == ifp->if_unit)
|
|
break;
|
|
}
|
|
*ep = c;
|
|
return (ifp);
|
|
}
|
|
|
|
/*
|
|
* Interface ioctls.
|
|
*/
|
|
int
|
|
ifioctl(so, cmd, data, p)
|
|
struct socket *so;
|
|
int cmd;
|
|
caddr_t data;
|
|
struct proc *p;
|
|
{
|
|
register struct ifnet *ifp;
|
|
register struct ifreq *ifr;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCGIFCONF:
|
|
case OSIOCGIFCONF:
|
|
return (ifconf(cmd, data));
|
|
}
|
|
ifr = (struct ifreq *)data;
|
|
ifp = ifunit(ifr->ifr_name);
|
|
if (ifp == 0)
|
|
return (ENXIO);
|
|
switch (cmd) {
|
|
|
|
case SIOCGIFFLAGS:
|
|
ifr->ifr_flags = ifp->if_flags;
|
|
break;
|
|
|
|
case SIOCGIFMETRIC:
|
|
ifr->ifr_metric = ifp->if_metric;
|
|
break;
|
|
|
|
case SIOCGIFMTU:
|
|
ifr->ifr_mtu = ifp->if_mtu;
|
|
break;
|
|
|
|
case SIOCGIFPHYS:
|
|
ifr->ifr_phys = ifp->if_physical;
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
|
|
int s = splimp();
|
|
if_down(ifp);
|
|
splx(s);
|
|
}
|
|
if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) {
|
|
int s = splimp();
|
|
if_up(ifp);
|
|
splx(s);
|
|
}
|
|
ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
|
|
(ifr->ifr_flags &~ IFF_CANTCHANGE);
|
|
if (ifp->if_ioctl)
|
|
(void) (*ifp->if_ioctl)(ifp, cmd, data);
|
|
microtime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
case SIOCSIFMETRIC:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
ifp->if_metric = ifr->ifr_metric;
|
|
microtime(&ifp->if_lastchange);
|
|
break;
|
|
|
|
case SIOCSIFPHYS:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return error;
|
|
if (!ifp->if_ioctl)
|
|
return EOPNOTSUPP;
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
if (error == 0)
|
|
microtime(&ifp->if_lastchange);
|
|
return(error);
|
|
|
|
case SIOCSIFMTU:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
/*
|
|
* 72 was chosen below because it is the size of a TCP/IP
|
|
* header (40) + the minimum mss (32).
|
|
*/
|
|
if (ifr->ifr_mtu < 72 || ifr->ifr_mtu > 65535)
|
|
return (EINVAL);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
if (error == 0)
|
|
microtime(&ifp->if_lastchange);
|
|
return(error);
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* Don't allow group membership on non-multicast interfaces. */
|
|
if ((ifp->if_flags & IFF_MULTICAST) == 0)
|
|
return EOPNOTSUPP;
|
|
|
|
/* Don't let users screw up protocols' entries. */
|
|
if (ifr->ifr_addr.sa_family != AF_LINK)
|
|
return EINVAL;
|
|
|
|
if (cmd == SIOCADDMULTI) {
|
|
struct ifmultiaddr *ifma;
|
|
error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
|
|
} else {
|
|
error = if_delmulti(ifp, &ifr->ifr_addr);
|
|
}
|
|
if (error == 0)
|
|
microtime(&ifp->if_lastchange);
|
|
return error;
|
|
|
|
case SIOCSIFMEDIA:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
if (ifp->if_ioctl == 0)
|
|
return (EOPNOTSUPP);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
if (error == 0)
|
|
microtime(&ifp->if_lastchange);
|
|
return error;
|
|
|
|
case SIOCGIFMEDIA:
|
|
if (ifp->if_ioctl == 0)
|
|
return (EOPNOTSUPP);
|
|
return ((*ifp->if_ioctl)(ifp, cmd, data));
|
|
|
|
default:
|
|
if (so->so_proto == 0)
|
|
return (EOPNOTSUPP);
|
|
#ifndef COMPAT_43
|
|
return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
|
|
data,
|
|
ifp));
|
|
#else
|
|
{
|
|
int ocmd = cmd;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCSIFADDR:
|
|
case SIOCSIFBRDADDR:
|
|
case SIOCSIFNETMASK:
|
|
#if BYTE_ORDER != BIG_ENDIAN
|
|
if (ifr->ifr_addr.sa_family == 0 &&
|
|
ifr->ifr_addr.sa_len < 16) {
|
|
ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
|
|
ifr->ifr_addr.sa_len = 16;
|
|
}
|
|
#else
|
|
if (ifr->ifr_addr.sa_len == 0)
|
|
ifr->ifr_addr.sa_len = 16;
|
|
#endif
|
|
break;
|
|
|
|
case OSIOCGIFADDR:
|
|
cmd = SIOCGIFADDR;
|
|
break;
|
|
|
|
case OSIOCGIFDSTADDR:
|
|
cmd = SIOCGIFDSTADDR;
|
|
break;
|
|
|
|
case OSIOCGIFBRDADDR:
|
|
cmd = SIOCGIFBRDADDR;
|
|
break;
|
|
|
|
case OSIOCGIFNETMASK:
|
|
cmd = SIOCGIFNETMASK;
|
|
}
|
|
error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
|
|
cmd,
|
|
data,
|
|
ifp, p));
|
|
switch (ocmd) {
|
|
|
|
case OSIOCGIFADDR:
|
|
case OSIOCGIFDSTADDR:
|
|
case OSIOCGIFBRDADDR:
|
|
case OSIOCGIFNETMASK:
|
|
*(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
|
|
}
|
|
return (error);
|
|
|
|
}
|
|
#endif
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Set/clear promiscuous mode on interface ifp based on the truth value
|
|
* of pswitch. The calls are reference counted so that only the first
|
|
* "on" request actually has an effect, as does the final "off" request.
|
|
* Results are undefined if the "off" and "on" requests are not matched.
|
|
*/
|
|
int
|
|
ifpromisc(ifp, pswitch)
|
|
struct ifnet *ifp;
|
|
int pswitch;
|
|
{
|
|
struct ifreq ifr;
|
|
int error;
|
|
|
|
if (pswitch) {
|
|
/*
|
|
* If the device is not configured up, we cannot put it in
|
|
* promiscuous mode.
|
|
*/
|
|
if ((ifp->if_flags & IFF_UP) == 0)
|
|
return (ENETDOWN);
|
|
if (ifp->if_pcount++ != 0)
|
|
return (0);
|
|
ifp->if_flags |= IFF_PROMISC;
|
|
log(LOG_INFO, "%s%d: promiscuous mode enabled\n",
|
|
ifp->if_name, ifp->if_unit);
|
|
} else {
|
|
if (--ifp->if_pcount > 0)
|
|
return (0);
|
|
ifp->if_flags &= ~IFF_PROMISC;
|
|
}
|
|
ifr.ifr_flags = ifp->if_flags;
|
|
error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
|
|
if (error == 0)
|
|
rt_ifmsg(ifp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Return interface configuration
|
|
* of system. List may be used
|
|
* in later ioctl's (above) to get
|
|
* other information.
|
|
*/
|
|
/*ARGSUSED*/
|
|
static int
|
|
ifconf(cmd, data)
|
|
int cmd;
|
|
caddr_t data;
|
|
{
|
|
register struct ifconf *ifc = (struct ifconf *)data;
|
|
register struct ifnet *ifp = ifnet.tqh_first;
|
|
register struct ifaddr *ifa;
|
|
struct ifreq ifr, *ifrp;
|
|
int space = ifc->ifc_len, error = 0;
|
|
|
|
ifrp = ifc->ifc_req;
|
|
for (; space > sizeof (ifr) && ifp; ifp = ifp->if_link.tqe_next) {
|
|
char workbuf[64];
|
|
int ifnlen;
|
|
|
|
ifnlen = sprintf(workbuf, "%s%d", ifp->if_name, ifp->if_unit);
|
|
if(ifnlen + 1 > sizeof ifr.ifr_name) {
|
|
error = ENAMETOOLONG;
|
|
} else {
|
|
strcpy(ifr.ifr_name, workbuf);
|
|
}
|
|
|
|
if ((ifa = ifp->if_addrhead.tqh_first) == 0) {
|
|
bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
|
|
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
|
|
sizeof (ifr));
|
|
if (error)
|
|
break;
|
|
space -= sizeof (ifr), ifrp++;
|
|
} else
|
|
for ( ; space > sizeof (ifr) && ifa;
|
|
ifa = ifa->ifa_link.tqe_next) {
|
|
register struct sockaddr *sa = ifa->ifa_addr;
|
|
#ifdef COMPAT_43
|
|
if (cmd == OSIOCGIFCONF) {
|
|
struct osockaddr *osa =
|
|
(struct osockaddr *)&ifr.ifr_addr;
|
|
ifr.ifr_addr = *sa;
|
|
osa->sa_family = sa->sa_family;
|
|
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
|
|
sizeof (ifr));
|
|
ifrp++;
|
|
} else
|
|
#endif
|
|
if (sa->sa_len <= sizeof(*sa)) {
|
|
ifr.ifr_addr = *sa;
|
|
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
|
|
sizeof (ifr));
|
|
ifrp++;
|
|
} else {
|
|
space -= sa->sa_len - sizeof(*sa);
|
|
if (space < sizeof (ifr))
|
|
break;
|
|
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
|
|
sizeof (ifr.ifr_name));
|
|
if (error == 0)
|
|
error = copyout((caddr_t)sa,
|
|
(caddr_t)&ifrp->ifr_addr, sa->sa_len);
|
|
ifrp = (struct ifreq *)
|
|
(sa->sa_len + (caddr_t)&ifrp->ifr_addr);
|
|
}
|
|
if (error)
|
|
break;
|
|
space -= sizeof (ifr);
|
|
}
|
|
}
|
|
ifc->ifc_len -= space;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Just like if_promisc(), but for all-multicast-reception mode.
|
|
*/
|
|
int
|
|
if_allmulti(ifp, onswitch)
|
|
struct ifnet *ifp;
|
|
int onswitch;
|
|
{
|
|
int error = 0;
|
|
int s = splimp();
|
|
|
|
if (onswitch) {
|
|
if (ifp->if_amcount++ == 0) {
|
|
ifp->if_flags |= IFF_ALLMULTI;
|
|
error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, 0);
|
|
}
|
|
} else {
|
|
if (ifp->if_amcount > 1) {
|
|
ifp->if_amcount--;
|
|
} else {
|
|
ifp->if_amcount = 0;
|
|
ifp->if_flags &= ~IFF_ALLMULTI;
|
|
error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, 0);
|
|
}
|
|
}
|
|
splx(s);
|
|
|
|
if (error == 0)
|
|
rt_ifmsg(ifp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Add a multicast listenership to the interface in question.
|
|
* The link layer provides a routine which converts
|
|
*/
|
|
int
|
|
if_addmulti(ifp, sa, retifma)
|
|
struct ifnet *ifp; /* interface to manipulate */
|
|
struct sockaddr *sa; /* address to add */
|
|
struct ifmultiaddr **retifma;
|
|
{
|
|
struct sockaddr *llsa, *dupsa;
|
|
int error, s;
|
|
struct ifmultiaddr *ifma;
|
|
|
|
/*
|
|
* If the matching multicast address already exists
|
|
* then don't add a new one, just add a reference
|
|
*/
|
|
for (ifma = ifp->if_multiaddrs.lh_first; ifma;
|
|
ifma = ifma->ifma_link.le_next) {
|
|
if (equal(sa, ifma->ifma_addr)) {
|
|
ifma->ifma_refcount++;
|
|
if (retifma)
|
|
*retifma = ifma;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Give the link layer a chance to accept/reject it, and also
|
|
* find out which AF_LINK address this maps to, if it isn't one
|
|
* already.
|
|
*/
|
|
if (ifp->if_resolvemulti) {
|
|
error = ifp->if_resolvemulti(ifp, &llsa, sa);
|
|
if (error) return error;
|
|
} else {
|
|
llsa = 0;
|
|
}
|
|
|
|
MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
|
|
MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
|
|
bcopy(sa, dupsa, sa->sa_len);
|
|
|
|
ifma->ifma_addr = dupsa;
|
|
ifma->ifma_lladdr = llsa;
|
|
ifma->ifma_ifp = ifp;
|
|
ifma->ifma_refcount = 1;
|
|
ifma->ifma_protospec = 0;
|
|
rt_newmaddrmsg(RTM_NEWMADDR, ifma);
|
|
|
|
/*
|
|
* Some network interfaces can scan the address list at
|
|
* interrupt time; lock them out.
|
|
*/
|
|
s = splimp();
|
|
LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
|
|
splx(s);
|
|
*retifma = ifma;
|
|
|
|
if (llsa != 0) {
|
|
for (ifma = ifp->if_multiaddrs.lh_first; ifma;
|
|
ifma = ifma->ifma_link.le_next) {
|
|
if (equal(ifma->ifma_addr, llsa))
|
|
break;
|
|
}
|
|
if (ifma) {
|
|
ifma->ifma_refcount++;
|
|
} else {
|
|
MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
|
|
M_IFMADDR, M_WAITOK);
|
|
MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
|
|
M_IFMADDR, M_WAITOK);
|
|
bcopy(llsa, dupsa, llsa->sa_len);
|
|
ifma->ifma_addr = dupsa;
|
|
ifma->ifma_ifp = ifp;
|
|
ifma->ifma_refcount = 1;
|
|
s = splimp();
|
|
LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
|
|
splx(s);
|
|
}
|
|
}
|
|
/*
|
|
* We are certain we have added something, so call down to the
|
|
* interface to let them know about it.
|
|
*/
|
|
s = splimp();
|
|
ifp->if_ioctl(ifp, SIOCADDMULTI, 0);
|
|
splx(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Remove a reference to a multicast address on this interface. Yell
|
|
* if the request does not match an existing membership.
|
|
*/
|
|
int
|
|
if_delmulti(ifp, sa)
|
|
struct ifnet *ifp;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct ifmultiaddr *ifma;
|
|
int s;
|
|
|
|
for (ifma = ifp->if_multiaddrs.lh_first; ifma;
|
|
ifma = ifma->ifma_link.le_next)
|
|
if (equal(sa, ifma->ifma_addr))
|
|
break;
|
|
if (ifma == 0)
|
|
return ENOENT;
|
|
|
|
if (ifma->ifma_refcount > 1) {
|
|
ifma->ifma_refcount--;
|
|
return 0;
|
|
}
|
|
|
|
rt_newmaddrmsg(RTM_DELMADDR, ifma);
|
|
sa = ifma->ifma_lladdr;
|
|
s = splimp();
|
|
LIST_REMOVE(ifma, ifma_link);
|
|
splx(s);
|
|
free(ifma->ifma_addr, M_IFMADDR);
|
|
free(ifma, M_IFMADDR);
|
|
if (sa == 0)
|
|
return 0;
|
|
|
|
/*
|
|
* Now look for the link-layer address which corresponds to
|
|
* this network address. It had been squirreled away in
|
|
* ifma->ifma_lladdr for this purpose (so we don't have
|
|
* to call ifp->if_resolvemulti() again), and we saved that
|
|
* value in sa above. If some nasty deleted the
|
|
* link-layer address out from underneath us, we can deal because
|
|
* the address we stored was is not the same as the one which was
|
|
* in the record for the link-layer address. (So we don't complain
|
|
* in that case.)
|
|
*/
|
|
for (ifma = ifp->if_multiaddrs.lh_first; ifma;
|
|
ifma = ifma->ifma_link.le_next)
|
|
if (equal(sa, ifma->ifma_addr))
|
|
break;
|
|
if (ifma == 0)
|
|
return 0;
|
|
|
|
if (ifma->ifma_refcount > 1) {
|
|
ifma->ifma_refcount--;
|
|
return 0;
|
|
}
|
|
|
|
s = splimp();
|
|
LIST_REMOVE(ifma, ifma_link);
|
|
splx(s);
|
|
free(ifma->ifma_addr, M_IFMADDR);
|
|
free(sa, M_IFMADDR);
|
|
free(ifma, M_IFMADDR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct ifmultiaddr *
|
|
ifmaof_ifpforaddr(sa, ifp)
|
|
struct sockaddr *sa;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct ifmultiaddr *ifma;
|
|
|
|
for (ifma = ifp->if_multiaddrs.lh_first; ifma;
|
|
ifma = ifma->ifma_link.le_next)
|
|
if (equal(ifma->ifma_addr, sa))
|
|
break;
|
|
|
|
return ifma;
|
|
}
|
|
|
|
SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
|
|
SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
|