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if.c revision 1.206
      1  1.206    dyoung /*	$NetBSD: if.c,v 1.206 2007/12/05 23:47:17 dyoung Exp $	*/
      2   1.53   thorpej 
      3   1.53   thorpej /*-
      4   1.89   thorpej  * Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc.
      5   1.53   thorpej  * All rights reserved.
      6   1.53   thorpej  *
      7   1.53   thorpej  * This code is derived from software contributed to The NetBSD Foundation
      8  1.150     peter  * by William Studenmund and Jason R. Thorpe.
      9   1.53   thorpej  *
     10   1.53   thorpej  * Redistribution and use in source and binary forms, with or without
     11   1.53   thorpej  * modification, are permitted provided that the following conditions
     12   1.53   thorpej  * are met:
     13   1.53   thorpej  * 1. Redistributions of source code must retain the above copyright
     14   1.53   thorpej  *    notice, this list of conditions and the following disclaimer.
     15   1.53   thorpej  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.53   thorpej  *    notice, this list of conditions and the following disclaimer in the
     17   1.53   thorpej  *    documentation and/or other materials provided with the distribution.
     18   1.53   thorpej  * 3. All advertising materials mentioning features or use of this software
     19   1.53   thorpej  *    must display the following acknowledgement:
     20   1.53   thorpej  *	This product includes software developed by the NetBSD
     21   1.53   thorpej  *	Foundation, Inc. and its contributors.
     22   1.53   thorpej  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23   1.53   thorpej  *    contributors may be used to endorse or promote products derived
     24   1.53   thorpej  *    from this software without specific prior written permission.
     25   1.53   thorpej  *
     26   1.53   thorpej  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27   1.53   thorpej  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28   1.53   thorpej  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29   1.53   thorpej  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30   1.53   thorpej  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31   1.53   thorpej  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32   1.53   thorpej  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33   1.53   thorpej  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34   1.53   thorpej  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35   1.53   thorpej  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36   1.53   thorpej  * POSSIBILITY OF SUCH DAMAGE.
     37   1.53   thorpej  */
     38   1.49    itojun 
     39   1.49    itojun /*
     40   1.49    itojun  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
     41   1.49    itojun  * All rights reserved.
     42  1.154     perry  *
     43   1.49    itojun  * Redistribution and use in source and binary forms, with or without
     44   1.49    itojun  * modification, are permitted provided that the following conditions
     45   1.49    itojun  * are met:
     46   1.49    itojun  * 1. Redistributions of source code must retain the above copyright
     47   1.49    itojun  *    notice, this list of conditions and the following disclaimer.
     48   1.49    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     49   1.49    itojun  *    notice, this list of conditions and the following disclaimer in the
     50   1.49    itojun  *    documentation and/or other materials provided with the distribution.
     51   1.49    itojun  * 3. Neither the name of the project nor the names of its contributors
     52   1.49    itojun  *    may be used to endorse or promote products derived from this software
     53   1.49    itojun  *    without specific prior written permission.
     54  1.154     perry  *
     55   1.49    itojun  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     56   1.49    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     57   1.49    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     58   1.49    itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     59   1.49    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     60   1.49    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     61   1.49    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     62   1.49    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     63   1.49    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     64   1.49    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     65   1.49    itojun  * SUCH DAMAGE.
     66   1.49    itojun  */
     67   1.16       cgd 
     68    1.1       cgd /*
     69   1.15   mycroft  * Copyright (c) 1980, 1986, 1993
     70   1.15   mycroft  *	The Regents of the University of California.  All rights reserved.
     71    1.1       cgd  *
     72    1.1       cgd  * Redistribution and use in source and binary forms, with or without
     73    1.1       cgd  * modification, are permitted provided that the following conditions
     74    1.1       cgd  * are met:
     75    1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     76    1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     77    1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     78    1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     79    1.1       cgd  *    documentation and/or other materials provided with the distribution.
     80  1.126       agc  * 3. Neither the name of the University nor the names of its contributors
     81    1.1       cgd  *    may be used to endorse or promote products derived from this software
     82    1.1       cgd  *    without specific prior written permission.
     83    1.1       cgd  *
     84    1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     85    1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     86    1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     87    1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     88    1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     89    1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     90    1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     91    1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     92    1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     93    1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     94    1.1       cgd  * SUCH DAMAGE.
     95    1.1       cgd  *
     96   1.44      fvdl  *	@(#)if.c	8.5 (Berkeley) 1/9/95
     97    1.1       cgd  */
     98   1.99     lukem 
     99   1.99     lukem #include <sys/cdefs.h>
    100  1.206    dyoung __KERNEL_RCSID(0, "$NetBSD: if.c,v 1.206 2007/12/05 23:47:17 dyoung Exp $");
    101   1.50   thorpej 
    102   1.50   thorpej #include "opt_inet.h"
    103   1.46   thorpej 
    104   1.51    bouyer #include "opt_atalk.h"
    105  1.120    martin #include "opt_natm.h"
    106   1.87   thorpej #include "opt_pfil_hooks.h"
    107    1.1       cgd 
    108    1.8   mycroft #include <sys/param.h>
    109    1.8   mycroft #include <sys/mbuf.h>
    110    1.8   mycroft #include <sys/systm.h>
    111   1.59   thorpej #include <sys/callout.h>
    112   1.15   mycroft #include <sys/proc.h>
    113    1.8   mycroft #include <sys/socket.h>
    114    1.8   mycroft #include <sys/socketvar.h>
    115   1.56   thorpej #include <sys/domain.h>
    116    1.8   mycroft #include <sys/protosw.h>
    117    1.8   mycroft #include <sys/kernel.h>
    118    1.8   mycroft #include <sys/ioctl.h>
    119  1.133  jonathan #include <sys/sysctl.h>
    120  1.159    dyoung #include <sys/syslog.h>
    121  1.165      elad #include <sys/kauth.h>
    122    1.1       cgd 
    123    1.8   mycroft #include <net/if.h>
    124    1.8   mycroft #include <net/if_dl.h>
    125   1.66      onoe #include <net/if_ether.h>
    126  1.124    dyoung #include <net/if_media.h>
    127  1.132    dyoung #include <net80211/ieee80211.h>
    128  1.132    dyoung #include <net80211/ieee80211_ioctl.h>
    129    1.8   mycroft #include <net/if_types.h>
    130   1.24  christos #include <net/radix.h>
    131   1.53   thorpej #include <net/route.h>
    132   1.95    itojun #include <net/netisr.h>
    133   1.51    bouyer #ifdef NETATALK
    134   1.51    bouyer #include <netatalk/at_extern.h>
    135   1.51    bouyer #include <netatalk/at.h>
    136   1.51    bouyer #endif
    137  1.143    itojun #include <net/pfil.h>
    138    1.1       cgd 
    139   1.49    itojun #ifdef INET6
    140   1.49    itojun #include <netinet/in.h>
    141   1.72   thorpej #include <netinet6/in6_var.h>
    142  1.108    itojun #include <netinet6/nd6.h>
    143   1.49    itojun #endif
    144  1.117   thorpej 
    145  1.166  liamjfoy #include "carp.h"
    146  1.166  liamjfoy #if NCARP > 0
    147  1.166  liamjfoy #include <netinet/ip_carp.h>
    148  1.166  liamjfoy #endif
    149  1.166  liamjfoy 
    150  1.186  christos #include <compat/sys/sockio.h>
    151  1.161  christos #include <compat/sys/socket.h>
    152  1.161  christos 
    153  1.117   thorpej MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
    154  1.117   thorpej MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
    155   1.49    itojun 
    156    1.1       cgd int	ifqmaxlen = IFQ_MAXLEN;
    157  1.193        ad callout_t if_slowtimo_ch;
    158   1.49    itojun 
    159  1.104      matt int netisr;			/* scheduling bits for network */
    160  1.104      matt 
    161  1.192    dyoung static int	if_rt_walktree(struct rtentry *, void *);
    162   1.53   thorpej 
    163  1.163   thorpej static struct if_clone *if_clone_lookup(const char *, int *);
    164  1.163   thorpej static int	if_clone_list(struct if_clonereq *);
    165   1.63   thorpej 
    166  1.163   thorpej static LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
    167  1.163   thorpej static int if_cloners_count;
    168   1.63   thorpej 
    169  1.143    itojun #ifdef PFIL_HOOKS
    170  1.143    itojun struct pfil_head if_pfil;	/* packet filtering hook for interfaces */
    171  1.143    itojun #endif
    172  1.143    itojun 
    173  1.163   thorpej static void if_detach_queues(struct ifnet *, struct ifqueue *);
    174   1.95    itojun 
    175    1.1       cgd /*
    176    1.1       cgd  * Network interface utility routines.
    177    1.1       cgd  *
    178    1.1       cgd  * Routines with ifa_ifwith* names take sockaddr *'s as
    179    1.1       cgd  * parameters.
    180    1.1       cgd  */
    181    1.4    andrew void
    182  1.163   thorpej ifinit(void)
    183    1.1       cgd {
    184    1.1       cgd 
    185  1.193        ad 	callout_init(&if_slowtimo_ch, 0);
    186    1.4    andrew 	if_slowtimo(NULL);
    187  1.143    itojun #ifdef PFIL_HOOKS
    188  1.143    itojun 	if_pfil.ph_type = PFIL_TYPE_IFNET;
    189  1.143    itojun 	if_pfil.ph_ifnet = NULL;
    190  1.143    itojun 	if (pfil_head_register(&if_pfil) != 0)
    191  1.143    itojun 		printf("WARNING: unable to register pfil hook\n");
    192  1.143    itojun #endif
    193    1.1       cgd }
    194    1.1       cgd 
    195   1.53   thorpej /*
    196   1.53   thorpej  * Null routines used while an interface is going away.  These routines
    197   1.53   thorpej  * just return an error.
    198   1.53   thorpej  */
    199   1.53   thorpej 
    200   1.53   thorpej int
    201  1.177  christos if_nulloutput(struct ifnet *ifp, struct mbuf *m,
    202  1.181    dyoung     const struct sockaddr *so, struct rtentry *rt)
    203   1.53   thorpej {
    204   1.53   thorpej 
    205  1.185    dyoung 	return ENXIO;
    206   1.53   thorpej }
    207   1.53   thorpej 
    208   1.53   thorpej void
    209  1.177  christos if_nullinput(struct ifnet *ifp, struct mbuf *m)
    210   1.53   thorpej {
    211   1.53   thorpej 
    212   1.53   thorpej 	/* Nothing. */
    213   1.53   thorpej }
    214   1.53   thorpej 
    215   1.53   thorpej void
    216  1.177  christos if_nullstart(struct ifnet *ifp)
    217   1.53   thorpej {
    218   1.53   thorpej 
    219   1.53   thorpej 	/* Nothing. */
    220   1.53   thorpej }
    221   1.53   thorpej 
    222   1.53   thorpej int
    223  1.183  christos if_nullioctl(struct ifnet *ifp, u_long cmd, void *data)
    224   1.53   thorpej {
    225   1.53   thorpej 
    226  1.185    dyoung 	return ENXIO;
    227   1.53   thorpej }
    228   1.53   thorpej 
    229   1.53   thorpej int
    230  1.177  christos if_nullinit(struct ifnet *ifp)
    231   1.53   thorpej {
    232   1.53   thorpej 
    233  1.185    dyoung 	return ENXIO;
    234   1.53   thorpej }
    235   1.53   thorpej 
    236   1.53   thorpej void
    237  1.177  christos if_nullstop(struct ifnet *ifp, int disable)
    238   1.75   thorpej {
    239   1.75   thorpej 
    240   1.75   thorpej 	/* Nothing. */
    241   1.75   thorpej }
    242   1.75   thorpej 
    243   1.75   thorpej void
    244  1.177  christos if_nullwatchdog(struct ifnet *ifp)
    245   1.53   thorpej {
    246   1.53   thorpej 
    247   1.53   thorpej 	/* Nothing. */
    248   1.53   thorpej }
    249   1.53   thorpej 
    250   1.53   thorpej void
    251  1.177  christos if_nulldrain(struct ifnet *ifp)
    252   1.53   thorpej {
    253   1.53   thorpej 
    254   1.53   thorpej 	/* Nothing. */
    255   1.53   thorpej }
    256   1.53   thorpej 
    257  1.137    itojun static u_int if_index = 1;
    258  1.103    simonb struct ifnet_head ifnet;
    259  1.137    itojun size_t if_indexlim = 0;
    260   1.49    itojun struct ifaddr **ifnet_addrs = NULL;
    261   1.49    itojun struct ifnet **ifindex2ifnet = NULL;
    262  1.148     peter struct ifnet *lo0ifp;
    263    1.1       cgd 
    264    1.1       cgd /*
    265   1.81   thorpej  * Allocate the link level name for the specified interface.  This
    266   1.81   thorpej  * is an attachment helper.  It must be called after ifp->if_addrlen
    267   1.81   thorpej  * is initialized, which may not be the case when if_attach() is
    268   1.81   thorpej  * called.
    269   1.81   thorpej  */
    270   1.81   thorpej void
    271   1.81   thorpej if_alloc_sadl(struct ifnet *ifp)
    272   1.81   thorpej {
    273   1.81   thorpej 	unsigned socksize, ifasize;
    274  1.195    dyoung 	int addrlen, namelen;
    275  1.195    dyoung 	struct sockaddr_dl *mask, *sdl;
    276   1.81   thorpej 	struct ifaddr *ifa;
    277   1.84   thorpej 
    278   1.84   thorpej 	/*
    279   1.84   thorpej 	 * If the interface already has a link name, release it
    280   1.84   thorpej 	 * now.  This is useful for interfaces that can change
    281   1.84   thorpej 	 * link types, and thus switch link names often.
    282   1.84   thorpej 	 */
    283   1.84   thorpej 	if (ifp->if_sadl != NULL)
    284   1.84   thorpej 		if_free_sadl(ifp);
    285   1.81   thorpej 
    286   1.81   thorpej 	namelen = strlen(ifp->if_xname);
    287  1.195    dyoung 	addrlen = ifp->if_addrlen;
    288  1.197    dyoung 	socksize = roundup(sockaddr_dl_measure(namelen, addrlen), sizeof(long));
    289   1.81   thorpej 	ifasize = sizeof(*ifa) + 2 * socksize;
    290  1.203    dyoung 	ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK|M_ZERO);
    291  1.195    dyoung 
    292   1.81   thorpej 	sdl = (struct sockaddr_dl *)(ifa + 1);
    293  1.195    dyoung 	mask = (struct sockaddr_dl *)(socksize + (char *)sdl);
    294  1.195    dyoung 
    295  1.197    dyoung 	sockaddr_dl_init(sdl, socksize, ifp->if_index, ifp->if_type,
    296  1.195    dyoung 	    ifp->if_xname, namelen, NULL, addrlen);
    297  1.195    dyoung 	mask->sdl_len = sockaddr_dl_measure(namelen, 0);
    298  1.197    dyoung 	memset(&mask->sdl_data[0], 0xff, namelen);
    299  1.195    dyoung 
    300   1.81   thorpej 	ifnet_addrs[ifp->if_index] = ifa;
    301   1.81   thorpej 	IFAREF(ifa);
    302   1.81   thorpej 	ifa->ifa_ifp = ifp;
    303   1.81   thorpej 	ifa->ifa_rtrequest = link_rtrequest;
    304   1.81   thorpej 	TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list);
    305   1.81   thorpej 	IFAREF(ifa);
    306   1.81   thorpej 	ifa->ifa_addr = (struct sockaddr *)sdl;
    307   1.81   thorpej 	ifp->if_sadl = sdl;
    308  1.195    dyoung 	ifa->ifa_netmask = (struct sockaddr *)mask;
    309   1.81   thorpej }
    310   1.81   thorpej 
    311   1.81   thorpej /*
    312   1.81   thorpej  * Free the link level name for the specified interface.  This is
    313   1.81   thorpej  * a detach helper.  This is called from if_detach() or from
    314   1.81   thorpej  * link layer type specific detach functions.
    315   1.81   thorpej  */
    316   1.81   thorpej void
    317   1.81   thorpej if_free_sadl(struct ifnet *ifp)
    318   1.81   thorpej {
    319   1.81   thorpej 	struct ifaddr *ifa;
    320   1.81   thorpej 	int s;
    321   1.81   thorpej 
    322   1.81   thorpej 	ifa = ifnet_addrs[ifp->if_index];
    323   1.81   thorpej 	if (ifa == NULL) {
    324   1.81   thorpej 		KASSERT(ifp->if_sadl == NULL);
    325   1.81   thorpej 		return;
    326   1.81   thorpej 	}
    327   1.81   thorpej 
    328   1.81   thorpej 	KASSERT(ifp->if_sadl != NULL);
    329   1.81   thorpej 
    330   1.88   thorpej 	s = splnet();
    331   1.81   thorpej 	rtinit(ifa, RTM_DELETE, 0);
    332   1.81   thorpej 	TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list);
    333   1.81   thorpej 	IFAFREE(ifa);
    334   1.81   thorpej 
    335   1.81   thorpej 	ifp->if_sadl = NULL;
    336   1.81   thorpej 
    337   1.81   thorpej 	ifnet_addrs[ifp->if_index] = NULL;
    338   1.81   thorpej 	IFAFREE(ifa);
    339   1.81   thorpej 	splx(s);
    340   1.81   thorpej }
    341   1.81   thorpej 
    342   1.81   thorpej /*
    343    1.1       cgd  * Attach an interface to the
    344    1.1       cgd  * list of "active" interfaces.
    345    1.1       cgd  */
    346   1.15   mycroft void
    347  1.163   thorpej if_attach(struct ifnet *ifp)
    348    1.1       cgd {
    349  1.102    atatat 	int indexlim = 0;
    350    1.1       cgd 
    351  1.102    atatat 	if (if_indexlim == 0) {
    352   1.22   mycroft 		TAILQ_INIT(&ifnet);
    353  1.102    atatat 		if_indexlim = 8;
    354  1.102    atatat 	}
    355   1.22   mycroft 	TAILQ_INIT(&ifp->if_addrlist);
    356   1.21   mycroft 	TAILQ_INSERT_TAIL(&ifnet, ifp, if_list);
    357  1.102    atatat 	ifp->if_index = if_index;
    358  1.185    dyoung 	if (ifindex2ifnet == NULL)
    359  1.102    atatat 		if_index++;
    360  1.102    atatat 	else
    361  1.131    itojun 		while (ifp->if_index < if_indexlim &&
    362  1.131    itojun 		    ifindex2ifnet[ifp->if_index] != NULL) {
    363  1.102    atatat 			++if_index;
    364  1.102    atatat 			if (if_index == 0)
    365  1.102    atatat 				if_index = 1;
    366  1.102    atatat 			/*
    367  1.102    atatat 			 * If we hit USHRT_MAX, we skip back to 0 since
    368  1.102    atatat 			 * there are a number of places where the value
    369  1.102    atatat 			 * of if_index or if_index itself is compared
    370  1.111    itojun 			 * to or stored in an unsigned short.  By
    371  1.102    atatat 			 * jumping back, we won't botch those assignments
    372  1.102    atatat 			 * or comparisons.
    373  1.102    atatat 			 */
    374  1.102    atatat 			else if (if_index == USHRT_MAX) {
    375  1.102    atatat 				/*
    376  1.102    atatat 				 * However, if we have to jump back to
    377  1.102    atatat 				 * zero *twice* without finding an empty
    378  1.102    atatat 				 * slot in ifindex2ifnet[], then there
    379  1.102    atatat 				 * there are too many (>65535) interfaces.
    380  1.102    atatat 				 */
    381  1.102    atatat 				if (indexlim++)
    382  1.102    atatat 					panic("too many interfaces");
    383  1.102    atatat 				else
    384  1.102    atatat 					if_index = 1;
    385  1.102    atatat 			}
    386  1.102    atatat 			ifp->if_index = if_index;
    387  1.102    atatat 		}
    388   1.49    itojun 
    389   1.49    itojun 	/*
    390   1.49    itojun 	 * We have some arrays that should be indexed by if_index.
    391   1.49    itojun 	 * since if_index will grow dynamically, they should grow too.
    392   1.49    itojun 	 *	struct ifadd **ifnet_addrs
    393   1.49    itojun 	 *	struct ifnet **ifindex2ifnet
    394   1.49    itojun 	 */
    395  1.185    dyoung 	if (ifnet_addrs == NULL || ifindex2ifnet == NULL ||
    396   1.53   thorpej 	    ifp->if_index >= if_indexlim) {
    397  1.131    itojun 		size_t m, n, oldlim;
    398  1.183  christos 		void *q;
    399  1.154     perry 
    400  1.131    itojun 		oldlim = if_indexlim;
    401   1.53   thorpej 		while (ifp->if_index >= if_indexlim)
    402   1.49    itojun 			if_indexlim <<= 1;
    403   1.49    itojun 
    404   1.49    itojun 		/* grow ifnet_addrs */
    405  1.131    itojun 		m = oldlim * sizeof(struct ifaddr *);
    406   1.81   thorpej 		n = if_indexlim * sizeof(struct ifaddr *);
    407  1.203    dyoung 		q = (void *)malloc(n, M_IFADDR, M_WAITOK|M_ZERO);
    408  1.185    dyoung 		if (ifnet_addrs != NULL) {
    409  1.185    dyoung 			memcpy(q, ifnet_addrs, m);
    410  1.183  christos 			free((void *)ifnet_addrs, M_IFADDR);
    411    1.1       cgd 		}
    412   1.49    itojun 		ifnet_addrs = (struct ifaddr **)q;
    413   1.49    itojun 
    414   1.49    itojun 		/* grow ifindex2ifnet */
    415  1.131    itojun 		m = oldlim * sizeof(struct ifnet *);
    416   1.49    itojun 		n = if_indexlim * sizeof(struct ifnet *);
    417  1.203    dyoung 		q = (void *)malloc(n, M_IFADDR, M_WAITOK|M_ZERO);
    418  1.185    dyoung 		if (ifindex2ifnet != NULL) {
    419  1.185    dyoung 			memcpy(q, (void *)ifindex2ifnet, m);
    420  1.183  christos 			free((void *)ifindex2ifnet, M_IFADDR);
    421   1.49    itojun 		}
    422   1.49    itojun 		ifindex2ifnet = (struct ifnet **)q;
    423    1.1       cgd 	}
    424   1.49    itojun 
    425   1.53   thorpej 	ifindex2ifnet[ifp->if_index] = ifp;
    426   1.49    itojun 
    427    1.1       cgd 	/*
    428   1.81   thorpej 	 * Link level name is allocated later by a separate call to
    429   1.81   thorpej 	 * if_alloc_sadl().
    430    1.1       cgd 	 */
    431   1.81   thorpej 
    432   1.40   thorpej 	if (ifp->if_snd.ifq_maxlen == 0)
    433   1.94    itojun 		ifp->if_snd.ifq_maxlen = ifqmaxlen;
    434   1.42        is 	ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */
    435   1.57   thorpej 
    436   1.57   thorpej 	ifp->if_link_state = LINK_STATE_UNKNOWN;
    437   1.57   thorpej 
    438   1.89   thorpej 	ifp->if_capenable = 0;
    439   1.97   thorpej 	ifp->if_csum_flags_tx = 0;
    440   1.97   thorpej 	ifp->if_csum_flags_rx = 0;
    441   1.89   thorpej 
    442   1.86   thorpej #ifdef ALTQ
    443   1.86   thorpej 	ifp->if_snd.altq_type = 0;
    444   1.86   thorpej 	ifp->if_snd.altq_disc = NULL;
    445   1.86   thorpej 	ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE;
    446   1.86   thorpej 	ifp->if_snd.altq_tbr  = NULL;
    447   1.86   thorpej 	ifp->if_snd.altq_ifp  = ifp;
    448   1.86   thorpej #endif
    449   1.86   thorpej 
    450   1.87   thorpej #ifdef PFIL_HOOKS
    451   1.87   thorpej 	ifp->if_pfil.ph_type = PFIL_TYPE_IFNET;
    452   1.87   thorpej 	ifp->if_pfil.ph_ifnet = ifp;
    453   1.87   thorpej 	if (pfil_head_register(&ifp->if_pfil) != 0)
    454   1.87   thorpej 		printf("%s: WARNING: unable to register pfil hook\n",
    455   1.87   thorpej 		    ifp->if_xname);
    456  1.144      yamt 	(void)pfil_run_hooks(&if_pfil,
    457  1.144      yamt 	    (struct mbuf **)PFIL_IFNET_ATTACH, ifp, PFIL_IFNET);
    458   1.87   thorpej #endif
    459   1.87   thorpej 
    460  1.152      matt 	if (!STAILQ_EMPTY(&domains))
    461  1.147      tron 		if_attachdomain1(ifp);
    462  1.147      tron 
    463  1.107    itojun 	/* Announce the interface. */
    464  1.107    itojun 	rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
    465  1.107    itojun }
    466  1.107    itojun 
    467  1.107    itojun void
    468  1.163   thorpej if_attachdomain(void)
    469  1.107    itojun {
    470  1.107    itojun 	struct ifnet *ifp;
    471  1.110    itojun 	int s;
    472  1.107    itojun 
    473  1.110    itojun 	s = splnet();
    474  1.185    dyoung 	IFNET_FOREACH(ifp)
    475  1.107    itojun 		if_attachdomain1(ifp);
    476  1.110    itojun 	splx(s);
    477  1.107    itojun }
    478  1.107    itojun 
    479  1.107    itojun void
    480  1.163   thorpej if_attachdomain1(struct ifnet *ifp)
    481  1.107    itojun {
    482  1.107    itojun 	struct domain *dp;
    483  1.109    itojun 	int s;
    484  1.109    itojun 
    485  1.109    itojun 	s = splnet();
    486  1.107    itojun 
    487  1.106    itojun 	/* address family dependent data region */
    488  1.106    itojun 	memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata));
    489  1.152      matt 	DOMAIN_FOREACH(dp) {
    490  1.185    dyoung 		if (dp->dom_ifattach != NULL)
    491  1.106    itojun 			ifp->if_afdata[dp->dom_family] =
    492  1.106    itojun 			    (*dp->dom_ifattach)(ifp);
    493  1.106    itojun 	}
    494  1.109    itojun 
    495  1.109    itojun 	splx(s);
    496    1.1       cgd }
    497   1.53   thorpej 
    498   1.53   thorpej /*
    499   1.53   thorpej  * Deactivate an interface.  This points all of the procedure
    500   1.53   thorpej  * handles at error stubs.  May be called from interrupt context.
    501   1.53   thorpej  */
    502   1.53   thorpej void
    503  1.163   thorpej if_deactivate(struct ifnet *ifp)
    504   1.53   thorpej {
    505   1.53   thorpej 	int s;
    506   1.53   thorpej 
    507   1.88   thorpej 	s = splnet();
    508   1.53   thorpej 
    509   1.53   thorpej 	ifp->if_output	 = if_nulloutput;
    510   1.53   thorpej 	ifp->if_input	 = if_nullinput;
    511   1.53   thorpej 	ifp->if_start	 = if_nullstart;
    512   1.53   thorpej 	ifp->if_ioctl	 = if_nullioctl;
    513   1.75   thorpej 	ifp->if_init	 = if_nullinit;
    514   1.75   thorpej 	ifp->if_stop	 = if_nullstop;
    515   1.53   thorpej 	ifp->if_watchdog = if_nullwatchdog;
    516   1.53   thorpej 	ifp->if_drain	 = if_nulldrain;
    517   1.53   thorpej 
    518   1.53   thorpej 	/* No more packets may be enqueued. */
    519   1.53   thorpej 	ifp->if_snd.ifq_maxlen = 0;
    520   1.53   thorpej 
    521   1.53   thorpej 	splx(s);
    522   1.53   thorpej }
    523   1.53   thorpej 
    524  1.206    dyoung void
    525  1.206    dyoung if_purgeaddrs(struct ifnet *ifp, int family,
    526  1.206    dyoung     void (*purgeaddr)(struct ifaddr *))
    527  1.206    dyoung {
    528  1.206    dyoung 	struct ifaddr *ifa, *nifa;
    529  1.206    dyoung 
    530  1.206    dyoung 	for (ifa = IFADDR_FIRST(ifp); ifa != NULL; ifa = nifa) {
    531  1.206    dyoung 		nifa = IFADDR_NEXT(ifa);
    532  1.206    dyoung 		if (ifa->ifa_addr->sa_family != family)
    533  1.206    dyoung 			continue;
    534  1.206    dyoung 		(*purgeaddr)(ifa);
    535  1.206    dyoung 	}
    536  1.206    dyoung }
    537  1.206    dyoung 
    538   1.53   thorpej /*
    539   1.53   thorpej  * Detach an interface from the list of "active" interfaces,
    540   1.53   thorpej  * freeing any resources as we go along.
    541   1.53   thorpej  *
    542   1.53   thorpej  * NOTE: This routine must be called with a valid thread context,
    543   1.53   thorpej  * as it may block.
    544   1.53   thorpej  */
    545   1.53   thorpej void
    546  1.163   thorpej if_detach(struct ifnet *ifp)
    547   1.53   thorpej {
    548   1.56   thorpej 	struct socket so;
    549  1.178    dyoung 	struct ifaddr *ifa;
    550   1.53   thorpej #ifdef IFAREF_DEBUG
    551   1.53   thorpej 	struct ifaddr *last_ifa = NULL;
    552   1.53   thorpej #endif
    553   1.56   thorpej 	struct domain *dp;
    554  1.141      matt 	const struct protosw *pr;
    555   1.56   thorpej 	int s, i, family, purged;
    556   1.53   thorpej 
    557   1.56   thorpej 	/*
    558   1.56   thorpej 	 * XXX It's kind of lame that we have to have the
    559   1.56   thorpej 	 * XXX socket structure...
    560   1.56   thorpej 	 */
    561   1.56   thorpej 	memset(&so, 0, sizeof(so));
    562   1.53   thorpej 
    563   1.88   thorpej 	s = splnet();
    564   1.53   thorpej 
    565   1.53   thorpej 	/*
    566   1.53   thorpej 	 * Do an if_down() to give protocols a chance to do something.
    567   1.53   thorpej 	 */
    568   1.53   thorpej 	if_down(ifp);
    569   1.86   thorpej 
    570   1.86   thorpej #ifdef ALTQ
    571   1.86   thorpej 	if (ALTQ_IS_ENABLED(&ifp->if_snd))
    572   1.86   thorpej 		altq_disable(&ifp->if_snd);
    573   1.86   thorpej 	if (ALTQ_IS_ATTACHED(&ifp->if_snd))
    574   1.86   thorpej 		altq_detach(&ifp->if_snd);
    575   1.87   thorpej #endif
    576   1.87   thorpej 
    577  1.166  liamjfoy 
    578  1.166  liamjfoy #if NCARP > 0
    579  1.166  liamjfoy 	/* Remove the interface from any carp group it is a part of.  */
    580  1.185    dyoung 	if (ifp->if_carp != NULL && ifp->if_type != IFT_CARP)
    581  1.166  liamjfoy 		carp_ifdetach(ifp);
    582  1.166  liamjfoy #endif
    583  1.166  liamjfoy 
    584   1.53   thorpej 	/*
    585   1.53   thorpej 	 * Rip all the addresses off the interface.  This should make
    586   1.53   thorpej 	 * all of the routes go away.
    587  1.178    dyoung 	 *
    588  1.178    dyoung 	 * pr_usrreq calls can remove an arbitrary number of ifaddrs
    589  1.178    dyoung 	 * from the list, including our "cursor", ifa.  For safety,
    590  1.178    dyoung 	 * and to honor the TAILQ abstraction, I just restart the
    591  1.178    dyoung 	 * loop after each removal.  Note that the loop will exit
    592  1.178    dyoung 	 * when all of the remaining ifaddrs belong to the AF_LINK
    593  1.178    dyoung 	 * family.  I am counting on the historical fact that at
    594  1.178    dyoung 	 * least one pr_usrreq in each address domain removes at
    595  1.178    dyoung 	 * least one ifaddr.
    596   1.53   thorpej 	 */
    597  1.178    dyoung again:
    598  1.204    dyoung 	IFADDR_FOREACH(ifa, ifp) {
    599   1.56   thorpej 		family = ifa->ifa_addr->sa_family;
    600   1.53   thorpej #ifdef IFAREF_DEBUG
    601   1.53   thorpej 		printf("if_detach: ifaddr %p, family %d, refcnt %d\n",
    602   1.56   thorpej 		    ifa, family, ifa->ifa_refcnt);
    603   1.53   thorpej 		if (last_ifa != NULL && ifa == last_ifa)
    604   1.56   thorpej 			panic("if_detach: loop detected");
    605   1.53   thorpej 		last_ifa = ifa;
    606   1.53   thorpej #endif
    607  1.178    dyoung 		if (family == AF_LINK)
    608  1.118    itojun 			continue;
    609  1.118    itojun 		dp = pffinddomain(family);
    610   1.56   thorpej #ifdef DIAGNOSTIC
    611  1.118    itojun 		if (dp == NULL)
    612  1.118    itojun 			panic("if_detach: no domain for AF %d",
    613  1.118    itojun 			    family);
    614   1.56   thorpej #endif
    615  1.160       gdt 		/*
    616  1.160       gdt 		 * XXX These PURGEIF calls are redundant with the
    617  1.160       gdt 		 * purge-all-families calls below, but are left in for
    618  1.160       gdt 		 * now both to make a smaller change, and to avoid
    619  1.160       gdt 		 * unplanned interactions with clearing of
    620  1.160       gdt 		 * ifp->if_addrlist.
    621  1.160       gdt 		 */
    622  1.118    itojun 		purged = 0;
    623  1.118    itojun 		for (pr = dp->dom_protosw;
    624  1.118    itojun 		     pr < dp->dom_protoswNPROTOSW; pr++) {
    625  1.118    itojun 			so.so_proto = pr;
    626  1.118    itojun 			if (pr->pr_usrreq != NULL) {
    627  1.118    itojun 				(void) (*pr->pr_usrreq)(&so,
    628  1.118    itojun 				    PRU_PURGEIF, NULL, NULL,
    629  1.162  christos 				    (struct mbuf *) ifp, curlwp);
    630  1.118    itojun 				purged = 1;
    631   1.53   thorpej 			}
    632  1.118    itojun 		}
    633  1.118    itojun 		if (purged == 0) {
    634  1.118    itojun 			/*
    635  1.118    itojun 			 * XXX What's really the best thing to do
    636  1.135    keihan 			 * XXX here?  --thorpej (at) NetBSD.org
    637  1.118    itojun 			 */
    638  1.118    itojun 			printf("if_detach: WARNING: AF %d not purged\n",
    639  1.118    itojun 			    family);
    640  1.134  drochner 			TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list);
    641   1.53   thorpej 		}
    642  1.178    dyoung 		goto again;
    643   1.53   thorpej 	}
    644  1.118    itojun 
    645  1.118    itojun 	if_free_sadl(ifp);
    646   1.53   thorpej 
    647  1.180    dyoung 	/* Walk the routing table looking for stragglers. */
    648  1.192    dyoung 	for (i = 0; i <= AF_MAX; i++)
    649  1.192    dyoung 		(void)rt_walktree(i, if_rt_walktree, ifp);
    650  1.106    itojun 
    651  1.152      matt 	DOMAIN_FOREACH(dp) {
    652  1.185    dyoung 		if (dp->dom_ifdetach != NULL && ifp->if_afdata[dp->dom_family])
    653  1.106    itojun 			(*dp->dom_ifdetach)(ifp,
    654  1.106    itojun 			    ifp->if_afdata[dp->dom_family]);
    655  1.160       gdt 
    656  1.160       gdt 		/*
    657  1.160       gdt 		 * One would expect multicast memberships (INET and
    658  1.160       gdt 		 * INET6) on UDP sockets to be purged by the PURGEIF
    659  1.160       gdt 		 * calls above, but if all addresses were removed from
    660  1.160       gdt 		 * the interface prior to destruction, the calls will
    661  1.160       gdt 		 * not be made (e.g. ppp, for which pppd(8) generally
    662  1.160       gdt 		 * removes addresses before destroying the interface).
    663  1.160       gdt 		 * Because there is no invariant that multicast
    664  1.160       gdt 		 * memberships only exist for interfaces with IPv4
    665  1.160       gdt 		 * addresses, we must call PURGEIF regardless of
    666  1.160       gdt 		 * addresses.  (Protocols which might store ifnet
    667  1.160       gdt 		 * pointers are marked with PR_PURGEIF.)
    668  1.160       gdt 		 */
    669  1.185    dyoung 		for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
    670  1.160       gdt 			so.so_proto = pr;
    671  1.185    dyoung 			if (pr->pr_usrreq != NULL && pr->pr_flags & PR_PURGEIF)
    672  1.185    dyoung 				(void)(*pr->pr_usrreq)(&so, PRU_PURGEIF, NULL,
    673  1.185    dyoung 				    NULL, (struct mbuf *)ifp, curlwp);
    674  1.160       gdt 		}
    675   1.53   thorpej 	}
    676   1.57   thorpej 
    677  1.184    dyoung #ifdef PFIL_HOOKS
    678  1.184    dyoung 	(void)pfil_run_hooks(&if_pfil,
    679  1.184    dyoung 	    (struct mbuf **)PFIL_IFNET_DETACH, ifp, PFIL_IFNET);
    680  1.184    dyoung 	(void)pfil_head_unregister(&ifp->if_pfil);
    681  1.184    dyoung #endif
    682  1.184    dyoung 
    683   1.57   thorpej 	/* Announce that the interface is gone. */
    684   1.57   thorpej 	rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
    685   1.93    itojun 
    686   1.93    itojun 	ifindex2ifnet[ifp->if_index] = NULL;
    687   1.53   thorpej 
    688   1.53   thorpej 	TAILQ_REMOVE(&ifnet, ifp, if_list);
    689   1.53   thorpej 
    690   1.95    itojun 	/*
    691  1.168      matt 	 * remove packets that came from ifp, from software interrupt queues.
    692   1.95    itojun 	 */
    693  1.168      matt 	DOMAIN_FOREACH(dp) {
    694  1.168      matt 		for (i = 0; i < __arraycount(dp->dom_ifqueues); i++) {
    695  1.168      matt 			if (dp->dom_ifqueues[i] == NULL)
    696  1.168      matt 				break;
    697  1.168      matt 			if_detach_queues(ifp, dp->dom_ifqueues[i]);
    698  1.168      matt 		}
    699  1.168      matt 	}
    700   1.95    itojun 
    701   1.53   thorpej 	splx(s);
    702   1.95    itojun }
    703   1.95    itojun 
    704   1.95    itojun static void
    705  1.163   thorpej if_detach_queues(struct ifnet *ifp, struct ifqueue *q)
    706   1.95    itojun {
    707   1.95    itojun 	struct mbuf *m, *prev, *next;
    708   1.95    itojun 
    709   1.95    itojun 	prev = NULL;
    710  1.185    dyoung 	for (m = q->ifq_head; m != NULL; m = next) {
    711   1.95    itojun 		next = m->m_nextpkt;
    712   1.95    itojun #ifdef DIAGNOSTIC
    713   1.96    itojun 		if ((m->m_flags & M_PKTHDR) == 0) {
    714   1.96    itojun 			prev = m;
    715   1.95    itojun 			continue;
    716   1.96    itojun 		}
    717   1.95    itojun #endif
    718   1.96    itojun 		if (m->m_pkthdr.rcvif != ifp) {
    719   1.96    itojun 			prev = m;
    720   1.95    itojun 			continue;
    721   1.96    itojun 		}
    722   1.95    itojun 
    723  1.185    dyoung 		if (prev != NULL)
    724   1.95    itojun 			prev->m_nextpkt = m->m_nextpkt;
    725   1.95    itojun 		else
    726   1.95    itojun 			q->ifq_head = m->m_nextpkt;
    727   1.95    itojun 		if (q->ifq_tail == m)
    728   1.95    itojun 			q->ifq_tail = prev;
    729   1.95    itojun 		q->ifq_len--;
    730   1.95    itojun 
    731   1.95    itojun 		m->m_nextpkt = NULL;
    732   1.95    itojun 		m_freem(m);
    733   1.95    itojun 		IF_DROP(q);
    734   1.95    itojun 	}
    735   1.53   thorpej }
    736   1.53   thorpej 
    737   1.53   thorpej /*
    738   1.53   thorpej  * Callback for a radix tree walk to delete all references to an
    739   1.53   thorpej  * ifnet.
    740   1.53   thorpej  */
    741  1.163   thorpej static int
    742  1.192    dyoung if_rt_walktree(struct rtentry *rt, void *v)
    743   1.53   thorpej {
    744   1.55    itojun 	struct ifnet *ifp = (struct ifnet *)v;
    745   1.53   thorpej 	int error;
    746   1.53   thorpej 
    747  1.185    dyoung 	if (rt->rt_ifp != ifp)
    748  1.185    dyoung 		return 0;
    749  1.185    dyoung 
    750  1.185    dyoung 	/* Delete the entry. */
    751  1.185    dyoung 	++rt->rt_refcnt;
    752  1.194    dyoung 	error = rtrequest(RTM_DELETE, rt_getkey(rt), rt->rt_gateway,
    753  1.185    dyoung 	    rt_mask(rt), rt->rt_flags, NULL);
    754  1.185    dyoung 	KASSERT((rt->rt_flags & RTF_UP) == 0);
    755  1.185    dyoung 	rt->rt_ifp = NULL;
    756  1.185    dyoung 	RTFREE(rt);
    757  1.185    dyoung 	if (error != 0)
    758  1.185    dyoung 		printf("%s: warning: unable to delete rtentry @ %p, "
    759  1.185    dyoung 		    "error = %d\n", ifp->if_xname, rt, error);
    760  1.185    dyoung 	return 0;
    761   1.53   thorpej }
    762   1.53   thorpej 
    763    1.1       cgd /*
    764   1.63   thorpej  * Create a clone network interface.
    765   1.63   thorpej  */
    766   1.63   thorpej int
    767  1.163   thorpej if_clone_create(const char *name)
    768   1.63   thorpej {
    769   1.63   thorpej 	struct if_clone *ifc;
    770   1.63   thorpej 	int unit;
    771   1.63   thorpej 
    772   1.63   thorpej 	ifc = if_clone_lookup(name, &unit);
    773   1.63   thorpej 	if (ifc == NULL)
    774  1.185    dyoung 		return EINVAL;
    775   1.63   thorpej 
    776   1.63   thorpej 	if (ifunit(name) != NULL)
    777  1.185    dyoung 		return EEXIST;
    778   1.63   thorpej 
    779  1.185    dyoung 	return (*ifc->ifc_create)(ifc, unit);
    780   1.63   thorpej }
    781   1.63   thorpej 
    782   1.63   thorpej /*
    783   1.63   thorpej  * Destroy a clone network interface.
    784   1.63   thorpej  */
    785   1.63   thorpej int
    786  1.163   thorpej if_clone_destroy(const char *name)
    787   1.63   thorpej {
    788   1.63   thorpej 	struct if_clone *ifc;
    789   1.63   thorpej 	struct ifnet *ifp;
    790   1.63   thorpej 
    791   1.63   thorpej 	ifc = if_clone_lookup(name, NULL);
    792   1.63   thorpej 	if (ifc == NULL)
    793  1.185    dyoung 		return EINVAL;
    794   1.63   thorpej 
    795   1.63   thorpej 	ifp = ifunit(name);
    796   1.63   thorpej 	if (ifp == NULL)
    797  1.185    dyoung 		return ENXIO;
    798   1.63   thorpej 
    799   1.63   thorpej 	if (ifc->ifc_destroy == NULL)
    800  1.185    dyoung 		return EOPNOTSUPP;
    801   1.63   thorpej 
    802  1.185    dyoung 	return (*ifc->ifc_destroy)(ifp);
    803   1.63   thorpej }
    804   1.63   thorpej 
    805   1.63   thorpej /*
    806   1.63   thorpej  * Look up a network interface cloner.
    807   1.63   thorpej  */
    808  1.163   thorpej static struct if_clone *
    809  1.163   thorpej if_clone_lookup(const char *name, int *unitp)
    810   1.63   thorpej {
    811   1.63   thorpej 	struct if_clone *ifc;
    812   1.63   thorpej 	const char *cp;
    813  1.128    itojun 	int unit;
    814   1.63   thorpej 
    815  1.128    itojun 	/* separate interface name from unit */
    816  1.128    itojun 	for (cp = name;
    817  1.130    itojun 	    cp - name < IFNAMSIZ && *cp && (*cp < '0' || *cp > '9');
    818  1.128    itojun 	    cp++)
    819  1.128    itojun 		continue;
    820  1.128    itojun 
    821  1.128    itojun 	if (cp == name || cp - name == IFNAMSIZ || !*cp)
    822  1.185    dyoung 		return NULL;	/* No name or unit number */
    823  1.128    itojun 
    824  1.128    itojun 	LIST_FOREACH(ifc, &if_cloners, ifc_list) {
    825  1.128    itojun 		if (strlen(ifc->ifc_name) == cp - name &&
    826  1.185    dyoung 		    strncmp(name, ifc->ifc_name, cp - name) == 0)
    827  1.128    itojun 			break;
    828   1.63   thorpej 	}
    829   1.63   thorpej 
    830  1.128    itojun 	if (ifc == NULL)
    831  1.185    dyoung 		return NULL;
    832   1.63   thorpej 
    833  1.128    itojun 	unit = 0;
    834  1.129    itojun 	while (cp - name < IFNAMSIZ && *cp) {
    835  1.129    itojun 		if (*cp < '0' || *cp > '9' || unit > INT_MAX / 10) {
    836   1.63   thorpej 			/* Bogus unit number. */
    837  1.185    dyoung 			return NULL;
    838   1.63   thorpej 		}
    839  1.128    itojun 		unit = (unit * 10) + (*cp++ - '0');
    840   1.63   thorpej 	}
    841   1.63   thorpej 
    842   1.63   thorpej 	if (unitp != NULL)
    843  1.128    itojun 		*unitp = unit;
    844  1.185    dyoung 	return ifc;
    845   1.63   thorpej }
    846   1.63   thorpej 
    847   1.63   thorpej /*
    848   1.63   thorpej  * Register a network interface cloner.
    849   1.63   thorpej  */
    850   1.63   thorpej void
    851  1.163   thorpej if_clone_attach(struct if_clone *ifc)
    852   1.63   thorpej {
    853   1.63   thorpej 
    854   1.63   thorpej 	LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
    855   1.67   thorpej 	if_cloners_count++;
    856   1.63   thorpej }
    857   1.63   thorpej 
    858   1.63   thorpej /*
    859   1.63   thorpej  * Unregister a network interface cloner.
    860   1.63   thorpej  */
    861   1.63   thorpej void
    862  1.163   thorpej if_clone_detach(struct if_clone *ifc)
    863   1.63   thorpej {
    864   1.63   thorpej 
    865   1.63   thorpej 	LIST_REMOVE(ifc, ifc_list);
    866   1.67   thorpej 	if_cloners_count--;
    867   1.67   thorpej }
    868   1.67   thorpej 
    869   1.67   thorpej /*
    870   1.67   thorpej  * Provide list of interface cloners to userspace.
    871   1.67   thorpej  */
    872  1.163   thorpej static int
    873  1.163   thorpej if_clone_list(struct if_clonereq *ifcr)
    874   1.67   thorpej {
    875   1.67   thorpej 	char outbuf[IFNAMSIZ], *dst;
    876   1.67   thorpej 	struct if_clone *ifc;
    877   1.67   thorpej 	int count, error = 0;
    878   1.67   thorpej 
    879   1.67   thorpej 	ifcr->ifcr_total = if_cloners_count;
    880   1.67   thorpej 	if ((dst = ifcr->ifcr_buffer) == NULL) {
    881   1.67   thorpej 		/* Just asking how many there are. */
    882  1.185    dyoung 		return 0;
    883   1.67   thorpej 	}
    884   1.67   thorpej 
    885   1.67   thorpej 	if (ifcr->ifcr_count < 0)
    886  1.185    dyoung 		return EINVAL;
    887   1.67   thorpej 
    888   1.67   thorpej 	count = (if_cloners_count < ifcr->ifcr_count) ?
    889   1.67   thorpej 	    if_cloners_count : ifcr->ifcr_count;
    890   1.67   thorpej 
    891   1.67   thorpej 	for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
    892   1.67   thorpej 	     ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
    893  1.175  christos 		(void)strncpy(outbuf, ifc->ifc_name, sizeof(outbuf));
    894  1.175  christos 		if (outbuf[sizeof(outbuf) - 1] != '\0')
    895  1.175  christos 			return ENAMETOOLONG;
    896  1.172  christos 		error = copyout(outbuf, dst, sizeof(outbuf));
    897  1.185    dyoung 		if (error != 0)
    898   1.67   thorpej 			break;
    899   1.67   thorpej 	}
    900   1.67   thorpej 
    901  1.185    dyoung 	return error;
    902   1.63   thorpej }
    903   1.63   thorpej 
    904  1.194    dyoung static inline int
    905  1.194    dyoung equal(const struct sockaddr *sa1, const struct sockaddr *sa2)
    906  1.194    dyoung {
    907  1.194    dyoung 	return sockaddr_cmp(sa1, sa2) == 0;
    908  1.194    dyoung }
    909  1.194    dyoung 
    910   1.63   thorpej /*
    911    1.1       cgd  * Locate an interface based on a complete address.
    912    1.1       cgd  */
    913    1.1       cgd /*ARGSUSED*/
    914    1.1       cgd struct ifaddr *
    915  1.163   thorpej ifa_ifwithaddr(const struct sockaddr *addr)
    916    1.1       cgd {
    917   1.61  augustss 	struct ifnet *ifp;
    918   1.61  augustss 	struct ifaddr *ifa;
    919    1.1       cgd 
    920  1.185    dyoung 	IFNET_FOREACH(ifp) {
    921   1.53   thorpej 		if (ifp->if_output == if_nulloutput)
    922    1.1       cgd 			continue;
    923  1.204    dyoung 		IFADDR_FOREACH(ifa, ifp) {
    924   1.53   thorpej 			if (ifa->ifa_addr->sa_family != addr->sa_family)
    925   1.53   thorpej 				continue;
    926   1.53   thorpej 			if (equal(addr, ifa->ifa_addr))
    927  1.185    dyoung 				return ifa;
    928   1.53   thorpej 			if ((ifp->if_flags & IFF_BROADCAST) &&
    929   1.53   thorpej 			    ifa->ifa_broadaddr &&
    930   1.53   thorpej 			    /* IP6 doesn't have broadcast */
    931   1.53   thorpej 			    ifa->ifa_broadaddr->sa_len != 0 &&
    932   1.53   thorpej 			    equal(ifa->ifa_broadaddr, addr))
    933  1.185    dyoung 				return ifa;
    934   1.53   thorpej 		}
    935    1.1       cgd 	}
    936  1.185    dyoung 	return NULL;
    937    1.1       cgd }
    938   1.49    itojun 
    939    1.1       cgd /*
    940    1.1       cgd  * Locate the point to point interface with a given destination address.
    941    1.1       cgd  */
    942    1.1       cgd /*ARGSUSED*/
    943    1.1       cgd struct ifaddr *
    944  1.163   thorpej ifa_ifwithdstaddr(const struct sockaddr *addr)
    945    1.1       cgd {
    946   1.61  augustss 	struct ifnet *ifp;
    947   1.61  augustss 	struct ifaddr *ifa;
    948    1.1       cgd 
    949  1.185    dyoung 	IFNET_FOREACH(ifp) {
    950   1.53   thorpej 		if (ifp->if_output == if_nulloutput)
    951   1.53   thorpej 			continue;
    952  1.185    dyoung 		if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
    953  1.185    dyoung 			continue;
    954  1.204    dyoung 		IFADDR_FOREACH(ifa, ifp) {
    955  1.185    dyoung 			if (ifa->ifa_addr->sa_family != addr->sa_family ||
    956  1.185    dyoung 			    ifa->ifa_dstaddr == NULL)
    957  1.185    dyoung 				continue;
    958  1.185    dyoung 			if (equal(addr, ifa->ifa_dstaddr))
    959  1.185    dyoung 				return ifa;
    960   1.53   thorpej 		}
    961    1.1       cgd 	}
    962  1.185    dyoung 	return NULL;
    963    1.1       cgd }
    964    1.1       cgd 
    965    1.1       cgd /*
    966    1.1       cgd  * Find an interface on a specific network.  If many, choice
    967   1.15   mycroft  * is most specific found.
    968    1.1       cgd  */
    969    1.1       cgd struct ifaddr *
    970  1.163   thorpej ifa_ifwithnet(const struct sockaddr *addr)
    971    1.1       cgd {
    972   1.61  augustss 	struct ifnet *ifp;
    973   1.61  augustss 	struct ifaddr *ifa;
    974  1.140      matt 	const struct sockaddr_dl *sdl;
    975   1.15   mycroft 	struct ifaddr *ifa_maybe = 0;
    976    1.1       cgd 	u_int af = addr->sa_family;
    977  1.171     pooka 	const char *addr_data = addr->sa_data, *cplim;
    978    1.1       cgd 
    979    1.1       cgd 	if (af == AF_LINK) {
    980  1.195    dyoung 		sdl = satocsdl(addr);
    981  1.137    itojun 		if (sdl->sdl_index && sdl->sdl_index < if_indexlim &&
    982  1.137    itojun 		    ifindex2ifnet[sdl->sdl_index] &&
    983   1.53   thorpej 		    ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput)
    984  1.185    dyoung 			return ifnet_addrs[sdl->sdl_index];
    985    1.1       cgd 	}
    986   1.51    bouyer #ifdef NETATALK
    987   1.51    bouyer 	if (af == AF_APPLETALK) {
    988  1.140      matt 		const struct sockaddr_at *sat, *sat2;
    989  1.158  christos 		sat = (const struct sockaddr_at *)addr;
    990  1.185    dyoung 		IFNET_FOREACH(ifp) {
    991   1.53   thorpej 			if (ifp->if_output == if_nulloutput)
    992   1.53   thorpej 				continue;
    993  1.158  christos 			ifa = at_ifawithnet((const struct sockaddr_at *)addr, ifp);
    994   1.62    bouyer 			if (ifa == NULL)
    995   1.62    bouyer 				continue;
    996   1.62    bouyer 			sat2 = (struct sockaddr_at *)ifa->ifa_addr;
    997   1.62    bouyer 			if (sat2->sat_addr.s_net == sat->sat_addr.s_net)
    998  1.185    dyoung 				return ifa; /* exact match */
    999   1.62    bouyer 			if (ifa_maybe == NULL) {
   1000  1.112       wiz 				/* else keep the if with the right range */
   1001   1.62    bouyer 				ifa_maybe = ifa;
   1002   1.62    bouyer 			}
   1003   1.51    bouyer 		}
   1004  1.185    dyoung 		return ifa_maybe;
   1005   1.51    bouyer 	}
   1006   1.51    bouyer #endif
   1007  1.185    dyoung 	IFNET_FOREACH(ifp) {
   1008   1.53   thorpej 		if (ifp->if_output == if_nulloutput)
   1009   1.53   thorpej 			continue;
   1010  1.204    dyoung 		IFADDR_FOREACH(ifa, ifp) {
   1011  1.171     pooka 			const char *cp, *cp2, *cp3;
   1012   1.15   mycroft 
   1013   1.15   mycroft 			if (ifa->ifa_addr->sa_family != af ||
   1014  1.185    dyoung 			    ifa->ifa_netmask == NULL)
   1015   1.53   thorpej  next:				continue;
   1016   1.15   mycroft 			cp = addr_data;
   1017   1.15   mycroft 			cp2 = ifa->ifa_addr->sa_data;
   1018   1.15   mycroft 			cp3 = ifa->ifa_netmask->sa_data;
   1019  1.171     pooka 			cplim = (const char *)ifa->ifa_netmask +
   1020   1.53   thorpej 			    ifa->ifa_netmask->sa_len;
   1021   1.53   thorpej 			while (cp3 < cplim) {
   1022   1.53   thorpej 				if ((*cp++ ^ *cp2++) & *cp3++) {
   1023   1.53   thorpej 					/* want to continue for() loop */
   1024   1.32       mrg 					goto next;
   1025   1.53   thorpej 				}
   1026   1.53   thorpej 			}
   1027  1.185    dyoung 			if (ifa_maybe == NULL ||
   1028  1.183  christos 			    rn_refines((void *)ifa->ifa_netmask,
   1029  1.183  christos 			    (void *)ifa_maybe->ifa_netmask))
   1030   1.15   mycroft 				ifa_maybe = ifa;
   1031   1.15   mycroft 		}
   1032   1.53   thorpej 	}
   1033  1.185    dyoung 	return ifa_maybe;
   1034   1.26       mrg }
   1035   1.53   thorpej 
   1036   1.26       mrg /*
   1037   1.26       mrg  * Find the interface of the addresss.
   1038   1.26       mrg  */
   1039   1.26       mrg struct ifaddr *
   1040  1.163   thorpej ifa_ifwithladdr(const struct sockaddr *addr)
   1041   1.26       mrg {
   1042   1.26       mrg 	struct ifaddr *ia;
   1043   1.26       mrg 
   1044   1.53   thorpej 	if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) ||
   1045   1.53   thorpej 	    (ia = ifa_ifwithnet(addr)))
   1046  1.185    dyoung 		return ia;
   1047  1.185    dyoung 	return NULL;
   1048    1.1       cgd }
   1049    1.1       cgd 
   1050    1.1       cgd /*
   1051    1.1       cgd  * Find an interface using a specific address family
   1052    1.1       cgd  */
   1053    1.1       cgd struct ifaddr *
   1054  1.163   thorpej ifa_ifwithaf(int af)
   1055    1.1       cgd {
   1056   1.61  augustss 	struct ifnet *ifp;
   1057   1.61  augustss 	struct ifaddr *ifa;
   1058    1.1       cgd 
   1059  1.185    dyoung 	IFNET_FOREACH(ifp) {
   1060   1.53   thorpej 		if (ifp->if_output == if_nulloutput)
   1061   1.53   thorpej 			continue;
   1062  1.204    dyoung 		IFADDR_FOREACH(ifa, ifp) {
   1063   1.21   mycroft 			if (ifa->ifa_addr->sa_family == af)
   1064  1.178    dyoung 				return ifa;
   1065   1.53   thorpej 		}
   1066   1.53   thorpej 	}
   1067  1.178    dyoung 	return NULL;
   1068    1.1       cgd }
   1069    1.1       cgd 
   1070    1.1       cgd /*
   1071    1.1       cgd  * Find an interface address specific to an interface best matching
   1072    1.1       cgd  * a given address.
   1073    1.1       cgd  */
   1074    1.1       cgd struct ifaddr *
   1075  1.163   thorpej ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
   1076    1.1       cgd {
   1077   1.61  augustss 	struct ifaddr *ifa;
   1078  1.140      matt 	const char *cp, *cp2, *cp3;
   1079  1.140      matt 	const char *cplim;
   1080    1.1       cgd 	struct ifaddr *ifa_maybe = 0;
   1081    1.1       cgd 	u_int af = addr->sa_family;
   1082    1.1       cgd 
   1083   1.53   thorpej 	if (ifp->if_output == if_nulloutput)
   1084  1.185    dyoung 		return NULL;
   1085   1.53   thorpej 
   1086    1.1       cgd 	if (af >= AF_MAX)
   1087  1.185    dyoung 		return NULL;
   1088   1.53   thorpej 
   1089  1.204    dyoung 	IFADDR_FOREACH(ifa, ifp) {
   1090    1.1       cgd 		if (ifa->ifa_addr->sa_family != af)
   1091    1.1       cgd 			continue;
   1092    1.1       cgd 		ifa_maybe = ifa;
   1093  1.185    dyoung 		if (ifa->ifa_netmask == NULL) {
   1094    1.1       cgd 			if (equal(addr, ifa->ifa_addr) ||
   1095   1.53   thorpej 			    (ifa->ifa_dstaddr &&
   1096   1.53   thorpej 			     equal(addr, ifa->ifa_dstaddr)))
   1097  1.185    dyoung 				return ifa;
   1098    1.1       cgd 			continue;
   1099    1.1       cgd 		}
   1100    1.1       cgd 		cp = addr->sa_data;
   1101    1.1       cgd 		cp2 = ifa->ifa_addr->sa_data;
   1102    1.1       cgd 		cp3 = ifa->ifa_netmask->sa_data;
   1103    1.1       cgd 		cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
   1104   1.53   thorpej 		for (; cp3 < cplim; cp3++) {
   1105    1.1       cgd 			if ((*cp++ ^ *cp2++) & *cp3)
   1106    1.1       cgd 				break;
   1107   1.53   thorpej 		}
   1108    1.1       cgd 		if (cp3 == cplim)
   1109  1.185    dyoung 			return ifa;
   1110    1.1       cgd 	}
   1111  1.185    dyoung 	return ifa_maybe;
   1112    1.1       cgd }
   1113    1.9   mycroft 
   1114    1.1       cgd /*
   1115    1.1       cgd  * Default action when installing a route with a Link Level gateway.
   1116    1.1       cgd  * Lookup an appropriate real ifa to point to.
   1117    1.1       cgd  * This should be moved to /sys/net/link.c eventually.
   1118    1.1       cgd  */
   1119   1.15   mycroft void
   1120  1.163   thorpej link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
   1121    1.1       cgd {
   1122   1.61  augustss 	struct ifaddr *ifa;
   1123  1.194    dyoung 	const struct sockaddr *dst;
   1124   1.15   mycroft 	struct ifnet *ifp;
   1125    1.1       cgd 
   1126  1.185    dyoung 	if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) ||
   1127  1.194    dyoung 	    ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_getkey(rt)) == NULL))
   1128    1.1       cgd 		return;
   1129   1.24  christos 	if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) {
   1130  1.176    dyoung 		rt_replace_ifa(rt, ifa);
   1131    1.1       cgd 		if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
   1132   1.82    itojun 			ifa->ifa_rtrequest(cmd, rt, info);
   1133    1.1       cgd 	}
   1134    1.1       cgd }
   1135    1.1       cgd 
   1136    1.1       cgd /*
   1137  1.159    dyoung  * Handle a change in the interface link state.
   1138  1.159    dyoung  */
   1139  1.159    dyoung void
   1140  1.159    dyoung if_link_state_change(struct ifnet *ifp, int link_state)
   1141  1.159    dyoung {
   1142  1.185    dyoung 	if (ifp->if_link_state == link_state)
   1143  1.185    dyoung 		return;
   1144  1.185    dyoung 	ifp->if_link_state = link_state;
   1145  1.159    dyoung 	/* Notify that the link state has changed. */
   1146  1.185    dyoung 	rt_ifmsg(ifp);
   1147  1.166  liamjfoy #if NCARP > 0
   1148  1.185    dyoung 	if (ifp->if_carp)
   1149  1.185    dyoung 		carp_carpdev_state(ifp);
   1150  1.166  liamjfoy #endif
   1151  1.159    dyoung }
   1152  1.159    dyoung 
   1153  1.159    dyoung /*
   1154    1.1       cgd  * Mark an interface down and notify protocols of
   1155    1.1       cgd  * the transition.
   1156   1.23   mycroft  * NOTE: must be called at splsoftnet or equivalent.
   1157    1.1       cgd  */
   1158   1.15   mycroft void
   1159  1.163   thorpej if_down(struct ifnet *ifp)
   1160    1.1       cgd {
   1161   1.61  augustss 	struct ifaddr *ifa;
   1162    1.1       cgd 
   1163    1.1       cgd 	ifp->if_flags &= ~IFF_UP;
   1164   1.91    itojun 	microtime(&ifp->if_lastchange);
   1165  1.204    dyoung 	IFADDR_FOREACH(ifa, ifp)
   1166    1.1       cgd 		pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
   1167   1.78   thorpej 	IFQ_PURGE(&ifp->if_snd);
   1168  1.166  liamjfoy #if NCARP > 0
   1169  1.166  liamjfoy 	if (ifp->if_carp)
   1170  1.166  liamjfoy 		carp_carpdev_state(ifp);
   1171  1.166  liamjfoy #endif
   1172   1.15   mycroft 	rt_ifmsg(ifp);
   1173   1.15   mycroft }
   1174   1.15   mycroft 
   1175   1.15   mycroft /*
   1176   1.15   mycroft  * Mark an interface up and notify protocols of
   1177   1.15   mycroft  * the transition.
   1178   1.23   mycroft  * NOTE: must be called at splsoftnet or equivalent.
   1179   1.15   mycroft  */
   1180   1.15   mycroft void
   1181  1.163   thorpej if_up(struct ifnet *ifp)
   1182   1.15   mycroft {
   1183   1.24  christos #ifdef notyet
   1184   1.61  augustss 	struct ifaddr *ifa;
   1185   1.24  christos #endif
   1186   1.15   mycroft 
   1187   1.15   mycroft 	ifp->if_flags |= IFF_UP;
   1188   1.91    itojun 	microtime(&ifp->if_lastchange);
   1189   1.15   mycroft #ifdef notyet
   1190   1.15   mycroft 	/* this has no effect on IP, and will kill all ISO connections XXX */
   1191  1.204    dyoung 	IFADDR_FOREACH(ifa, ifp)
   1192   1.15   mycroft 		pfctlinput(PRC_IFUP, ifa->ifa_addr);
   1193   1.15   mycroft #endif
   1194  1.166  liamjfoy #if NCARP > 0
   1195  1.166  liamjfoy 	if (ifp->if_carp)
   1196  1.166  liamjfoy 		carp_carpdev_state(ifp);
   1197  1.166  liamjfoy #endif
   1198   1.15   mycroft 	rt_ifmsg(ifp);
   1199   1.49    itojun #ifdef INET6
   1200   1.49    itojun 	in6_if_up(ifp);
   1201   1.49    itojun #endif
   1202    1.1       cgd }
   1203    1.1       cgd 
   1204    1.1       cgd /*
   1205    1.1       cgd  * Handle interface watchdog timer routines.  Called
   1206    1.1       cgd  * from softclock, we decrement timers (if set) and
   1207    1.1       cgd  * call the appropriate interface routine on expiration.
   1208    1.1       cgd  */
   1209    1.4    andrew void
   1210  1.177  christos if_slowtimo(void *arg)
   1211    1.1       cgd {
   1212   1.61  augustss 	struct ifnet *ifp;
   1213   1.88   thorpej 	int s = splnet();
   1214    1.1       cgd 
   1215  1.185    dyoung 	IFNET_FOREACH(ifp) {
   1216    1.1       cgd 		if (ifp->if_timer == 0 || --ifp->if_timer)
   1217    1.1       cgd 			continue;
   1218  1.185    dyoung 		if (ifp->if_watchdog != NULL)
   1219   1.34   thorpej 			(*ifp->if_watchdog)(ifp);
   1220    1.1       cgd 	}
   1221    1.1       cgd 	splx(s);
   1222  1.185    dyoung 	callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
   1223   1.65   thorpej }
   1224   1.65   thorpej 
   1225   1.65   thorpej /*
   1226   1.65   thorpej  * Set/clear promiscuous mode on interface ifp based on the truth value
   1227   1.65   thorpej  * of pswitch.  The calls are reference counted so that only the first
   1228   1.65   thorpej  * "on" request actually has an effect, as does the final "off" request.
   1229   1.65   thorpej  * Results are undefined if the "off" and "on" requests are not matched.
   1230   1.65   thorpej  */
   1231   1.65   thorpej int
   1232  1.163   thorpej ifpromisc(struct ifnet *ifp, int pswitch)
   1233   1.65   thorpej {
   1234   1.65   thorpej 	int pcount, ret;
   1235   1.65   thorpej 	short flags;
   1236   1.65   thorpej 	struct ifreq ifr;
   1237   1.65   thorpej 
   1238   1.65   thorpej 	pcount = ifp->if_pcount;
   1239   1.65   thorpej 	flags = ifp->if_flags;
   1240   1.65   thorpej 	if (pswitch) {
   1241   1.65   thorpej 		/*
   1242   1.71   thorpej 		 * Allow the device to be "placed" into promiscuous
   1243   1.71   thorpej 		 * mode even if it is not configured up.  It will
   1244   1.71   thorpej 		 * consult IFF_PROMISC when it is is brought up.
   1245   1.65   thorpej 		 */
   1246   1.68        pk 		if (ifp->if_pcount++ != 0)
   1247  1.185    dyoung 			return 0;
   1248   1.65   thorpej 		ifp->if_flags |= IFF_PROMISC;
   1249   1.71   thorpej 		if ((ifp->if_flags & IFF_UP) == 0)
   1250  1.185    dyoung 			return 0;
   1251   1.65   thorpej 	} else {
   1252   1.65   thorpej 		if (--ifp->if_pcount > 0)
   1253  1.185    dyoung 			return 0;
   1254   1.65   thorpej 		ifp->if_flags &= ~IFF_PROMISC;
   1255   1.65   thorpej 		/*
   1256   1.65   thorpej 		 * If the device is not configured up, we should not need to
   1257   1.65   thorpej 		 * turn off promiscuous mode (device should have turned it
   1258   1.65   thorpej 		 * off when interface went down; and will look at IFF_PROMISC
   1259   1.65   thorpej 		 * again next time interface comes up).
   1260   1.65   thorpej 		 */
   1261   1.65   thorpej 		if ((ifp->if_flags & IFF_UP) == 0)
   1262  1.185    dyoung 			return 0;
   1263   1.65   thorpej 	}
   1264   1.65   thorpej 	memset(&ifr, 0, sizeof(ifr));
   1265   1.65   thorpej 	ifr.ifr_flags = ifp->if_flags;
   1266  1.183  christos 	ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (void *) &ifr);
   1267   1.65   thorpej 	/* Restore interface state if not successful. */
   1268   1.65   thorpej 	if (ret != 0) {
   1269   1.65   thorpej 		ifp->if_pcount = pcount;
   1270   1.65   thorpej 		ifp->if_flags = flags;
   1271   1.65   thorpej 	}
   1272  1.185    dyoung 	return ret;
   1273    1.1       cgd }
   1274    1.1       cgd 
   1275    1.1       cgd /*
   1276    1.1       cgd  * Map interface name to
   1277    1.1       cgd  * interface structure pointer.
   1278    1.1       cgd  */
   1279    1.1       cgd struct ifnet *
   1280  1.163   thorpej ifunit(const char *name)
   1281    1.1       cgd {
   1282   1.61  augustss 	struct ifnet *ifp;
   1283  1.105      matt 	const char *cp = name;
   1284  1.105      matt 	u_int unit = 0;
   1285  1.105      matt 	u_int i;
   1286  1.105      matt 
   1287  1.105      matt 	/*
   1288  1.105      matt 	 * If the entire name is a number, treat it as an ifindex.
   1289  1.105      matt 	 */
   1290  1.105      matt 	for (i = 0; i < IFNAMSIZ && *cp >= '0' && *cp <= '9'; i++, cp++) {
   1291  1.105      matt 		unit = unit * 10 + (*cp - '0');
   1292  1.105      matt 	}
   1293  1.105      matt 
   1294  1.105      matt 	/*
   1295  1.105      matt 	 * If the number took all of the name, then it's a valid ifindex.
   1296  1.105      matt 	 */
   1297  1.105      matt 	if (i == IFNAMSIZ || (cp != name && *cp == '\0')) {
   1298  1.137    itojun 		if (unit >= if_indexlim)
   1299  1.185    dyoung 			return NULL;
   1300  1.105      matt 		ifp = ifindex2ifnet[unit];
   1301  1.105      matt 		if (ifp == NULL || ifp->if_output == if_nulloutput)
   1302  1.185    dyoung 			return NULL;
   1303  1.185    dyoung 		return ifp;
   1304  1.105      matt 	}
   1305   1.34   thorpej 
   1306  1.185    dyoung 	IFNET_FOREACH(ifp) {
   1307   1.53   thorpej 		if (ifp->if_output == if_nulloutput)
   1308   1.53   thorpej 			continue;
   1309   1.53   thorpej 	 	if (strcmp(ifp->if_xname, name) == 0)
   1310  1.185    dyoung 			return ifp;
   1311   1.53   thorpej 	}
   1312  1.185    dyoung 	return NULL;
   1313    1.1       cgd }
   1314   1.49    itojun 
   1315    1.1       cgd /*
   1316    1.1       cgd  * Interface ioctls.
   1317    1.1       cgd  */
   1318   1.15   mycroft int
   1319  1.183  christos ifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l)
   1320    1.1       cgd {
   1321   1.61  augustss 	struct ifnet *ifp;
   1322   1.61  augustss 	struct ifreq *ifr;
   1323   1.89   thorpej 	struct ifcapreq *ifcr;
   1324  1.105      matt 	struct ifdatareq *ifdr;
   1325   1.89   thorpej 	int s, error = 0;
   1326  1.191  christos #if defined(COMPAT_OSOCK) || defined(COMPAT_OIFREQ)
   1327  1.191  christos 	u_long ocmd = cmd;
   1328  1.191  christos #endif
   1329   1.49    itojun 	short oif_flags;
   1330  1.186  christos #ifdef COMPAT_OIFREQ
   1331  1.186  christos 	struct ifreq ifrb;
   1332  1.187   xtraeme 	struct oifreq *oifr = NULL;
   1333  1.186  christos #endif
   1334    1.1       cgd 
   1335    1.1       cgd 	switch (cmd) {
   1336  1.186  christos #ifdef COMPAT_OIFREQ
   1337  1.186  christos 	case OSIOCGIFCONF:
   1338  1.186  christos 	case OOSIOCGIFCONF:
   1339  1.186  christos 		return compat_ifconf(cmd, data);
   1340  1.186  christos #endif
   1341    1.1       cgd 	case SIOCGIFCONF:
   1342  1.185    dyoung 		return ifconf(cmd, data);
   1343    1.1       cgd 	}
   1344  1.191  christos 
   1345  1.186  christos #ifdef COMPAT_OIFREQ
   1346  1.196       skd 	cmd = compat_cvtcmd(cmd);
   1347  1.186  christos 	if (cmd != ocmd) {
   1348  1.186  christos 		oifr = data;
   1349  1.186  christos 		data = ifr = &ifrb;
   1350  1.186  christos 		ifreqo2n(oifr, ifr);
   1351  1.186  christos 	} else
   1352  1.186  christos #endif
   1353  1.186  christos 		ifr = data;
   1354  1.186  christos 	ifcr = data;
   1355  1.186  christos 	ifdr = data;
   1356   1.63   thorpej 
   1357  1.174      elad 	ifp = ifunit(ifr->ifr_name);
   1358  1.174      elad 
   1359   1.63   thorpej 	switch (cmd) {
   1360   1.63   thorpej 	case SIOCIFCREATE:
   1361   1.63   thorpej 	case SIOCIFDESTROY:
   1362  1.185    dyoung 		if (l != NULL) {
   1363  1.174      elad 			error = kauth_authorize_network(l->l_cred,
   1364  1.174      elad 			    KAUTH_NETWORK_INTERFACE,
   1365  1.174      elad 			    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
   1366  1.174      elad 			    (void *)cmd, NULL);
   1367  1.185    dyoung 			if (error != 0)
   1368  1.151      yamt 				return error;
   1369  1.151      yamt 		}
   1370  1.185    dyoung 		return (cmd == SIOCIFCREATE) ?
   1371   1.64   thorpej 			if_clone_create(ifr->ifr_name) :
   1372  1.185    dyoung 			if_clone_destroy(ifr->ifr_name);
   1373   1.67   thorpej 
   1374   1.67   thorpej 	case SIOCIFGCLONERS:
   1375  1.185    dyoung 		return if_clone_list((struct if_clonereq *)data);
   1376   1.63   thorpej 	}
   1377   1.63   thorpej 
   1378  1.185    dyoung 	if (ifp == NULL)
   1379  1.185    dyoung 		return ENXIO;
   1380  1.151      yamt 
   1381  1.151      yamt 	switch (cmd) {
   1382  1.151      yamt 	case SIOCSIFFLAGS:
   1383  1.151      yamt 	case SIOCSIFCAP:
   1384  1.151      yamt 	case SIOCSIFMETRIC:
   1385  1.151      yamt 	case SIOCZIFDATA:
   1386  1.151      yamt 	case SIOCSIFMTU:
   1387  1.151      yamt 	case SIOCSIFPHYADDR:
   1388  1.151      yamt 	case SIOCDIFPHYADDR:
   1389  1.151      yamt #ifdef INET6
   1390  1.151      yamt 	case SIOCSIFPHYADDR_IN6:
   1391  1.151      yamt #endif
   1392  1.151      yamt 	case SIOCSLIFPHYADDR:
   1393  1.151      yamt 	case SIOCADDMULTI:
   1394  1.151      yamt 	case SIOCDELMULTI:
   1395  1.151      yamt 	case SIOCSIFMEDIA:
   1396  1.154     perry 	case SIOCSDRVSPEC:
   1397  1.196       skd 	case SIOCG80211:
   1398  1.196       skd 	case SIOCS80211:
   1399  1.151      yamt 	case SIOCS80211NWID:
   1400  1.151      yamt 	case SIOCS80211NWKEY:
   1401  1.151      yamt 	case SIOCS80211POWER:
   1402  1.151      yamt 	case SIOCS80211BSSID:
   1403  1.151      yamt 	case SIOCS80211CHANNEL:
   1404  1.185    dyoung 		if (l != NULL) {
   1405  1.174      elad 			error = kauth_authorize_network(l->l_cred,
   1406  1.174      elad 			    KAUTH_NETWORK_INTERFACE,
   1407  1.174      elad 			    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp,
   1408  1.174      elad 			    (void *)cmd, NULL);
   1409  1.185    dyoung 			if (error != 0)
   1410  1.151      yamt 				return error;
   1411  1.151      yamt 		}
   1412  1.151      yamt 	}
   1413  1.151      yamt 
   1414   1.49    itojun 	oif_flags = ifp->if_flags;
   1415    1.1       cgd 	switch (cmd) {
   1416    1.1       cgd 
   1417    1.1       cgd 	case SIOCGIFFLAGS:
   1418    1.1       cgd 		ifr->ifr_flags = ifp->if_flags;
   1419    1.1       cgd 		break;
   1420    1.1       cgd 
   1421    1.1       cgd 	case SIOCGIFMETRIC:
   1422    1.1       cgd 		ifr->ifr_metric = ifp->if_metric;
   1423    1.1       cgd 		break;
   1424    1.7   hpeyerl 
   1425   1.36   mycroft 	case SIOCGIFMTU:
   1426   1.37       cgd 		ifr->ifr_mtu = ifp->if_mtu;
   1427   1.80   thorpej 		break;
   1428   1.80   thorpej 
   1429   1.80   thorpej 	case SIOCGIFDLT:
   1430   1.80   thorpej 		ifr->ifr_dlt = ifp->if_dlt;
   1431   1.37       cgd 		break;
   1432   1.36   mycroft 
   1433    1.1       cgd 	case SIOCSIFFLAGS:
   1434    1.1       cgd 		if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
   1435   1.89   thorpej 			s = splnet();
   1436    1.1       cgd 			if_down(ifp);
   1437    1.1       cgd 			splx(s);
   1438    1.1       cgd 		}
   1439   1.15   mycroft 		if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) {
   1440   1.89   thorpej 			s = splnet();
   1441   1.15   mycroft 			if_up(ifp);
   1442   1.15   mycroft 			splx(s);
   1443   1.15   mycroft 		}
   1444    1.1       cgd 		ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
   1445    1.1       cgd 			(ifr->ifr_flags &~ IFF_CANTCHANGE);
   1446    1.1       cgd 		if (ifp->if_ioctl)
   1447  1.185    dyoung 			(void)(*ifp->if_ioctl)(ifp, cmd, data);
   1448    1.1       cgd 		break;
   1449    1.1       cgd 
   1450   1.89   thorpej 	case SIOCGIFCAP:
   1451   1.89   thorpej 		ifcr->ifcr_capabilities = ifp->if_capabilities;
   1452   1.89   thorpej 		ifcr->ifcr_capenable = ifp->if_capenable;
   1453   1.89   thorpej 		break;
   1454   1.89   thorpej 
   1455   1.89   thorpej 	case SIOCSIFCAP:
   1456   1.89   thorpej 		if ((ifcr->ifcr_capenable & ~ifp->if_capabilities) != 0)
   1457  1.185    dyoung 			return EINVAL;
   1458   1.89   thorpej 		if (ifp->if_ioctl == NULL)
   1459  1.185    dyoung 			return EOPNOTSUPP;
   1460   1.89   thorpej 
   1461   1.89   thorpej 		/* Must prevent race with packet reception here. */
   1462   1.89   thorpej 		s = splnet();
   1463   1.89   thorpej 		if (ifcr->ifcr_capenable != ifp->if_capenable) {
   1464   1.89   thorpej 			struct ifreq ifrq;
   1465   1.89   thorpej 
   1466   1.89   thorpej 			ifrq.ifr_flags = ifp->if_flags;
   1467   1.89   thorpej 			ifp->if_capenable = ifcr->ifcr_capenable;
   1468   1.89   thorpej 
   1469   1.89   thorpej 			/* Pre-compute the checksum flags mask. */
   1470   1.97   thorpej 			ifp->if_csum_flags_tx = 0;
   1471   1.97   thorpej 			ifp->if_csum_flags_rx = 0;
   1472  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_IPv4_Tx) {
   1473   1.97   thorpej 				ifp->if_csum_flags_tx |= M_CSUM_IPv4;
   1474  1.157      yamt 			}
   1475  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_IPv4_Rx) {
   1476   1.97   thorpej 				ifp->if_csum_flags_rx |= M_CSUM_IPv4;
   1477   1.97   thorpej 			}
   1478   1.97   thorpej 
   1479  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Tx) {
   1480   1.97   thorpej 				ifp->if_csum_flags_tx |= M_CSUM_TCPv4;
   1481  1.157      yamt 			}
   1482  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_TCPv4_Rx) {
   1483   1.97   thorpej 				ifp->if_csum_flags_rx |= M_CSUM_TCPv4;
   1484  1.157      yamt 			}
   1485   1.97   thorpej 
   1486  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Tx) {
   1487   1.97   thorpej 				ifp->if_csum_flags_tx |= M_CSUM_UDPv4;
   1488  1.157      yamt 			}
   1489  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_UDPv4_Rx) {
   1490   1.97   thorpej 				ifp->if_csum_flags_rx |= M_CSUM_UDPv4;
   1491  1.157      yamt 			}
   1492   1.97   thorpej 
   1493  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Tx) {
   1494   1.97   thorpej 				ifp->if_csum_flags_tx |= M_CSUM_TCPv6;
   1495  1.157      yamt 			}
   1496  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_TCPv6_Rx) {
   1497   1.97   thorpej 				ifp->if_csum_flags_rx |= M_CSUM_TCPv6;
   1498   1.97   thorpej 			}
   1499   1.97   thorpej 
   1500  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Tx) {
   1501   1.97   thorpej 				ifp->if_csum_flags_tx |= M_CSUM_UDPv6;
   1502  1.157      yamt 			}
   1503  1.157      yamt 			if (ifp->if_capenable & IFCAP_CSUM_UDPv6_Rx) {
   1504   1.97   thorpej 				ifp->if_csum_flags_rx |= M_CSUM_UDPv6;
   1505   1.97   thorpej 			}
   1506   1.89   thorpej 
   1507   1.89   thorpej 			/*
   1508   1.89   thorpej 			 * Only kick the interface if it's up.  If it's
   1509   1.89   thorpej 			 * not up now, it will notice the cap enables
   1510   1.89   thorpej 			 * when it is brought up later.
   1511   1.89   thorpej 			 */
   1512   1.89   thorpej 			if (ifp->if_flags & IFF_UP)
   1513  1.185    dyoung 				(void)(*ifp->if_ioctl)(ifp, SIOCSIFFLAGS,
   1514  1.185    dyoung 				    (void *)&ifrq);
   1515   1.89   thorpej 		}
   1516   1.89   thorpej 		splx(s);
   1517   1.89   thorpej 		break;
   1518   1.89   thorpej 
   1519    1.1       cgd 	case SIOCSIFMETRIC:
   1520    1.1       cgd 		ifp->if_metric = ifr->ifr_metric;
   1521  1.105      matt 		break;
   1522  1.105      matt 
   1523  1.105      matt 	case SIOCGIFDATA:
   1524  1.105      matt 		ifdr->ifdr_data = ifp->if_data;
   1525  1.105      matt 		break;
   1526  1.105      matt 
   1527  1.105      matt 	case SIOCZIFDATA:
   1528  1.105      matt 		ifdr->ifdr_data = ifp->if_data;
   1529  1.105      matt 		/*
   1530  1.105      matt 		 * Assumes that the volatile counters that can be
   1531  1.105      matt 		 * zero'ed are at the end of if_data.
   1532  1.105      matt 		 */
   1533  1.105      matt 		memset(&ifp->if_data.ifi_ipackets, 0, sizeof(ifp->if_data) -
   1534  1.105      matt 		    offsetof(struct if_data, ifi_ipackets));
   1535    1.5   deraadt 		break;
   1536    1.5   deraadt 
   1537   1.36   mycroft 	case SIOCSIFMTU:
   1538   1.49    itojun 	{
   1539   1.49    itojun 		u_long oldmtu = ifp->if_mtu;
   1540   1.49    itojun 
   1541   1.49    itojun 		if (ifp->if_ioctl == NULL)
   1542  1.185    dyoung 			return EOPNOTSUPP;
   1543   1.49    itojun 		error = (*ifp->if_ioctl)(ifp, cmd, data);
   1544   1.49    itojun 
   1545   1.49    itojun 		/*
   1546   1.49    itojun 		 * If the link MTU changed, do network layer specific procedure.
   1547   1.49    itojun 		 */
   1548   1.49    itojun 		if (ifp->if_mtu != oldmtu) {
   1549   1.49    itojun #ifdef INET6
   1550   1.49    itojun 			nd6_setmtu(ifp);
   1551  1.154     perry #endif
   1552   1.49    itojun 		}
   1553   1.49    itojun 		break;
   1554   1.49    itojun 	}
   1555   1.72   thorpej 	case SIOCSIFPHYADDR:
   1556   1.72   thorpej 	case SIOCDIFPHYADDR:
   1557   1.72   thorpej #ifdef INET6
   1558   1.72   thorpej 	case SIOCSIFPHYADDR_IN6:
   1559   1.72   thorpej #endif
   1560   1.85    itojun 	case SIOCSLIFPHYADDR:
   1561   1.15   mycroft 	case SIOCADDMULTI:
   1562   1.15   mycroft 	case SIOCDELMULTI:
   1563   1.39   thorpej 	case SIOCSIFMEDIA:
   1564   1.74    itojun 	case SIOCGIFPSRCADDR:
   1565   1.74    itojun 	case SIOCGIFPDSTADDR:
   1566   1.85    itojun 	case SIOCGLIFPHYADDR:
   1567   1.39   thorpej 	case SIOCGIFMEDIA:
   1568  1.196       skd 	case SIOCG80211:
   1569  1.196       skd 	case SIOCS80211:
   1570  1.196       skd 	case SIOCS80211NWID:
   1571  1.196       skd 	case SIOCS80211NWKEY:
   1572  1.196       skd 	case SIOCS80211POWER:
   1573  1.196       skd 	case SIOCS80211BSSID:
   1574  1.196       skd 	case SIOCS80211CHANNEL:
   1575  1.185    dyoung 		if (ifp->if_ioctl == NULL)
   1576  1.185    dyoung 			return EOPNOTSUPP;
   1577   1.49    itojun 		error = (*ifp->if_ioctl)(ifp, cmd, data);
   1578   1.49    itojun 		break;
   1579    1.1       cgd 
   1580  1.154     perry 	case SIOCSDRVSPEC:
   1581    1.1       cgd 	default:
   1582  1.185    dyoung 		if (so->so_proto == NULL)
   1583  1.185    dyoung 			return EOPNOTSUPP;
   1584  1.161  christos #ifdef COMPAT_OSOCK
   1585  1.186  christos 		error = compat_ifioctl(so, ocmd, cmd, data, l);
   1586  1.161  christos #else
   1587   1.49    itojun 		error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
   1588   1.36   mycroft 		    (struct mbuf *)cmd, (struct mbuf *)data,
   1589  1.162  christos 		    (struct mbuf *)ifp, l));
   1590    1.1       cgd #endif
   1591   1.49    itojun 		break;
   1592   1.49    itojun 	}
   1593    1.1       cgd 
   1594   1.49    itojun 	if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) {
   1595   1.49    itojun #ifdef INET6
   1596   1.49    itojun 		if ((ifp->if_flags & IFF_UP) != 0) {
   1597   1.89   thorpej 			s = splnet();
   1598   1.49    itojun 			in6_if_up(ifp);
   1599   1.49    itojun 			splx(s);
   1600   1.49    itojun 		}
   1601    1.1       cgd #endif
   1602    1.1       cgd 	}
   1603  1.186  christos #ifdef COMPAT_OIFREQ
   1604  1.186  christos 	if (cmd != ocmd)
   1605  1.186  christos 		ifreqn2o(oifr, ifr);
   1606  1.186  christos #endif
   1607   1.49    itojun 
   1608  1.185    dyoung 	return error;
   1609    1.1       cgd }
   1610    1.1       cgd 
   1611    1.1       cgd /*
   1612    1.1       cgd  * Return interface configuration
   1613    1.1       cgd  * of system.  List may be used
   1614    1.1       cgd  * in later ioctl's (above) to get
   1615    1.1       cgd  * other information.
   1616  1.200       gdt  *
   1617  1.200       gdt  * Each record is a struct ifreq.  Before the addition of
   1618  1.200       gdt  * sockaddr_storage, the API rule was that sockaddr flavors that did
   1619  1.200       gdt  * not fit would extend beyond the struct ifreq, with the next struct
   1620  1.200       gdt  * ifreq starting sa_len beyond the struct sockaddr.  Because the
   1621  1.200       gdt  * union in struct ifreq includes struct sockaddr_storage, every kind
   1622  1.200       gdt  * of sockaddr must fit.  Thus, there are no longer any overlength
   1623  1.200       gdt  * records.
   1624  1.200       gdt  *
   1625  1.200       gdt  * Records are added to the user buffer if they fit, and ifc_len is
   1626  1.200       gdt  * adjusted to the length that was written.  Thus, the user is only
   1627  1.200       gdt  * assured of getting the complete list if ifc_len on return is at
   1628  1.200       gdt  * least sizeof(struct ifreq) less than it was on entry.
   1629  1.200       gdt  *
   1630  1.200       gdt  * If the user buffer pointer is NULL, this routine copies no data and
   1631  1.200       gdt  * returns the amount of space that would be needed.
   1632  1.200       gdt  *
   1633  1.200       gdt  * Invariants:
   1634  1.200       gdt  * ifrp points to the next part of the user's buffer to be used.  If
   1635  1.200       gdt  * ifrp != NULL, space holds the number of bytes remaining that we may
   1636  1.200       gdt  * write at ifrp.  Otherwise, space holds the number of bytes that
   1637  1.200       gdt  * would have been written had there been adequate space.
   1638    1.1       cgd  */
   1639    1.1       cgd /*ARGSUSED*/
   1640   1.15   mycroft int
   1641  1.183  christos ifconf(u_long cmd, void *data)
   1642    1.1       cgd {
   1643   1.61  augustss 	struct ifconf *ifc = (struct ifconf *)data;
   1644   1.61  augustss 	struct ifnet *ifp;
   1645   1.61  augustss 	struct ifaddr *ifa;
   1646    1.1       cgd 	struct ifreq ifr, *ifrp;
   1647  1.190     enami 	int space, error = 0;
   1648  1.200       gdt 	const int sz = (int)sizeof(struct ifreq);
   1649    1.1       cgd 
   1650  1.190     enami 	if ((ifrp = ifc->ifc_req) == NULL)
   1651  1.127  christos 		space = 0;
   1652  1.190     enami 	else
   1653  1.190     enami 		space = ifc->ifc_len;
   1654  1.153      matt 	IFNET_FOREACH(ifp) {
   1655  1.175  christos 		(void)strncpy(ifr.ifr_name, ifp->if_xname,
   1656  1.173  christos 		    sizeof(ifr.ifr_name));
   1657  1.175  christos 		if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0')
   1658  1.175  christos 			return ENAMETOOLONG;
   1659  1.205    dyoung 		if (IFADDR_EMPTY(ifp)) {
   1660  1.200       gdt 			/* Interface with no addresses - send zero sockaddr. */
   1661  1.127  christos 			memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
   1662  1.200       gdt 			if (ifrp != NULL)
   1663  1.200       gdt 			{
   1664  1.200       gdt 				if (space >= sz) {
   1665  1.200       gdt 					error = copyout(&ifr, ifrp, sz);
   1666  1.200       gdt 					if (error != 0)
   1667  1.200       gdt 						return (error);
   1668  1.200       gdt 					ifrp++; space -= sz;
   1669  1.200       gdt 				}
   1670   1.70    mellon 			}
   1671  1.200       gdt 			else
   1672  1.200       gdt 				space += sz;
   1673  1.127  christos 			continue;
   1674  1.127  christos 		}
   1675  1.127  christos 
   1676  1.204    dyoung 		IFADDR_FOREACH(ifa, ifp) {
   1677   1.61  augustss 			struct sockaddr *sa = ifa->ifa_addr;
   1678  1.200       gdt 			/* all sockaddrs must fit in sockaddr_storage */
   1679  1.200       gdt 			KASSERT(sa->sa_len <= sizeof(ifr.ifr_ifru));
   1680  1.200       gdt 
   1681  1.200       gdt 			if (ifrp != NULL)
   1682  1.200       gdt 			{
   1683  1.201       gdt 				memcpy(&ifr.ifr_space, sa, sa->sa_len);
   1684  1.190     enami 				if (space >= sz) {
   1685  1.127  christos 					error = copyout(&ifr, ifrp, sz);
   1686  1.200       gdt 					if (error != 0)
   1687  1.200       gdt 						return (error);
   1688  1.200       gdt 					ifrp++; space -= sz;
   1689   1.70    mellon 				}
   1690    1.1       cgd 			}
   1691  1.200       gdt 			else
   1692  1.200       gdt 				space += sz;
   1693    1.1       cgd 		}
   1694    1.1       cgd 	}
   1695  1.127  christos 	if (ifrp != NULL)
   1696  1.200       gdt 	{
   1697  1.200       gdt 		KASSERT(0 <= space && space <= ifc->ifc_len);
   1698  1.127  christos 		ifc->ifc_len -= space;
   1699  1.200       gdt 	}
   1700  1.127  christos 	else
   1701  1.200       gdt 	{
   1702  1.200       gdt 		KASSERT(space >= 0);
   1703  1.200       gdt 		ifc->ifc_len = space;
   1704  1.200       gdt 	}
   1705  1.190     enami 	return (0);
   1706    1.1       cgd }
   1707  1.133  jonathan 
   1708  1.198    dyoung int
   1709  1.198    dyoung ifreq_setaddr(const u_long cmd, struct ifreq *ifr, const struct sockaddr *sa)
   1710  1.198    dyoung {
   1711  1.198    dyoung 	uint8_t len;
   1712  1.198    dyoung 	u_long ncmd;
   1713  1.198    dyoung 	const uint8_t osockspace = sizeof(ifr->ifr_addr);
   1714  1.198    dyoung 	const uint8_t sockspace = sizeof(ifr->ifr_ifru.ifru_space);
   1715  1.198    dyoung 
   1716  1.199    dyoung #ifdef INET6
   1717  1.198    dyoung 	if (cmd == SIOCGIFPSRCADDR_IN6 || cmd == SIOCGIFPDSTADDR_IN6)
   1718  1.198    dyoung 		len = MIN(sizeof(struct sockaddr_in6), sa->sa_len);
   1719  1.199    dyoung 	else
   1720  1.199    dyoung #endif /* INET6 */
   1721  1.199    dyoung 	if ((ncmd = compat_cvtcmd(cmd)) != cmd)
   1722  1.202    dyoung 		len = MIN(osockspace, sa->sa_len);
   1723  1.202    dyoung 	else
   1724  1.198    dyoung 		len = MIN(sockspace, sa->sa_len);
   1725  1.198    dyoung 	if (len < sa->sa_len)
   1726  1.198    dyoung 		return EFBIG;
   1727  1.202    dyoung 	sockaddr_copy(&ifr->ifr_addr, len, sa);
   1728  1.198    dyoung 	return 0;
   1729  1.198    dyoung }
   1730  1.198    dyoung 
   1731  1.155  christos /*
   1732  1.155  christos  * Queue message on interface, and start output if interface
   1733  1.155  christos  * not yet active.
   1734  1.155  christos  */
   1735  1.155  christos int
   1736  1.155  christos ifq_enqueue(struct ifnet *ifp, struct mbuf *m
   1737  1.155  christos     ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr))
   1738  1.155  christos {
   1739  1.155  christos 	int len = m->m_pkthdr.len;
   1740  1.155  christos 	int mflags = m->m_flags;
   1741  1.155  christos 	int s = splnet();
   1742  1.155  christos 	int error;
   1743  1.155  christos 
   1744  1.156  christos 	IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error);
   1745  1.185    dyoung 	if (error != 0)
   1746  1.185    dyoung 		goto out;
   1747  1.155  christos 	ifp->if_obytes += len;
   1748  1.155  christos 	if (mflags & M_MCAST)
   1749  1.155  christos 		ifp->if_omcasts++;
   1750  1.155  christos 	if ((ifp->if_flags & IFF_OACTIVE) == 0)
   1751  1.155  christos 		(*ifp->if_start)(ifp);
   1752  1.185    dyoung out:
   1753  1.155  christos 	splx(s);
   1754  1.155  christos 	return error;
   1755  1.155  christos }
   1756  1.155  christos 
   1757  1.155  christos /*
   1758  1.155  christos  * Queue message on interface, possibly using a second fast queue
   1759  1.155  christos  */
   1760  1.155  christos int
   1761  1.155  christos ifq_enqueue2(struct ifnet *ifp, struct ifqueue *ifq, struct mbuf *m
   1762  1.155  christos     ALTQ_COMMA ALTQ_DECL(struct altq_pktattr *pktattr))
   1763  1.155  christos {
   1764  1.155  christos 	int error = 0;
   1765  1.155  christos 
   1766  1.155  christos 	if (ifq != NULL
   1767  1.155  christos #ifdef ALTQ
   1768  1.155  christos 	    && ALTQ_IS_ENABLED(&ifp->if_snd) == 0
   1769  1.155  christos #endif
   1770  1.155  christos 	    ) {
   1771  1.155  christos 		if (IF_QFULL(ifq)) {
   1772  1.155  christos 			IF_DROP(&ifp->if_snd);
   1773  1.155  christos 			m_freem(m);
   1774  1.155  christos 			if (error == 0)
   1775  1.155  christos 				error = ENOBUFS;
   1776  1.185    dyoung 		} else
   1777  1.155  christos 			IF_ENQUEUE(ifq, m);
   1778  1.155  christos 	} else
   1779  1.156  christos 		IFQ_ENQUEUE(&ifp->if_snd, m, pktattr, error);
   1780  1.155  christos 	if (error != 0) {
   1781  1.155  christos 		++ifp->if_oerrors;
   1782  1.155  christos 		return error;
   1783  1.155  christos 	}
   1784  1.155  christos 	return 0;
   1785  1.155  christos }
   1786  1.155  christos 
   1787  1.155  christos 
   1788  1.138  drochner #if defined(INET) || defined(INET6)
   1789  1.136    atatat static void
   1790  1.139    atatat sysctl_net_ifq_setup(struct sysctllog **clog,
   1791  1.139    atatat 		     int pf, const char *pfname,
   1792  1.136    atatat 		     int ipn, const char *ipname,
   1793  1.136    atatat 		     int qid, struct ifqueue *ifq)
   1794  1.136    atatat {
   1795  1.136    atatat 
   1796  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1797  1.139    atatat 		       CTLFLAG_PERMANENT,
   1798  1.136    atatat 		       CTLTYPE_NODE, "net", NULL,
   1799  1.136    atatat 		       NULL, 0, NULL, 0,
   1800  1.136    atatat 		       CTL_NET, CTL_EOL);
   1801  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1802  1.139    atatat 		       CTLFLAG_PERMANENT,
   1803  1.136    atatat 		       CTLTYPE_NODE, pfname, NULL,
   1804  1.136    atatat 		       NULL, 0, NULL, 0,
   1805  1.136    atatat 		       CTL_NET, pf, CTL_EOL);
   1806  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1807  1.139    atatat 		       CTLFLAG_PERMANENT,
   1808  1.136    atatat 		       CTLTYPE_NODE, ipname, NULL,
   1809  1.136    atatat 		       NULL, 0, NULL, 0,
   1810  1.136    atatat 		       CTL_NET, pf, ipn, CTL_EOL);
   1811  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1812  1.139    atatat 		       CTLFLAG_PERMANENT,
   1813  1.142    atatat 		       CTLTYPE_NODE, "ifq",
   1814  1.142    atatat 		       SYSCTL_DESCR("Protocol input queue controls"),
   1815  1.139    atatat 		       NULL, 0, NULL, 0,
   1816  1.139    atatat 		       CTL_NET, pf, ipn, qid, CTL_EOL);
   1817  1.136    atatat 
   1818  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1819  1.139    atatat 		       CTLFLAG_PERMANENT,
   1820  1.142    atatat 		       CTLTYPE_INT, "len",
   1821  1.142    atatat 		       SYSCTL_DESCR("Current input queue length"),
   1822  1.136    atatat 		       NULL, 0, &ifq->ifq_len, 0,
   1823  1.136    atatat 		       CTL_NET, pf, ipn, qid, IFQCTL_LEN, CTL_EOL);
   1824  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1825  1.139    atatat 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
   1826  1.142    atatat 		       CTLTYPE_INT, "maxlen",
   1827  1.142    atatat 		       SYSCTL_DESCR("Maximum allowed input queue length"),
   1828  1.136    atatat 		       NULL, 0, &ifq->ifq_maxlen, 0,
   1829  1.136    atatat 		       CTL_NET, pf, ipn, qid, IFQCTL_MAXLEN, CTL_EOL);
   1830  1.133  jonathan #ifdef notyet
   1831  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1832  1.139    atatat 		       CTLFLAG_PERMANENT,
   1833  1.142    atatat 		       CTLTYPE_INT, "peak",
   1834  1.142    atatat 		       SYSCTL_DESCR("Highest input queue length"),
   1835  1.136    atatat 		       NULL, 0, &ifq->ifq_peak, 0,
   1836  1.136    atatat 		       CTL_NET, pf, ipn, qid, IFQCTL_PEAK, CTL_EOL);
   1837  1.136    atatat #endif
   1838  1.139    atatat 	sysctl_createv(clog, 0, NULL, NULL,
   1839  1.139    atatat 		       CTLFLAG_PERMANENT,
   1840  1.142    atatat 		       CTLTYPE_INT, "drops",
   1841  1.142    atatat 		       SYSCTL_DESCR("Packets dropped due to full input queue"),
   1842  1.136    atatat 		       NULL, 0, &ifq->ifq_drops, 0,
   1843  1.136    atatat 		       CTL_NET, pf, ipn, qid, IFQCTL_DROPS, CTL_EOL);
   1844  1.136    atatat }
   1845  1.136    atatat 
   1846  1.136    atatat #ifdef INET
   1847  1.136    atatat SYSCTL_SETUP(sysctl_net_inet_ip_ifq_setup,
   1848  1.136    atatat 	     "sysctl net.inet.ip.ifq subtree setup")
   1849  1.136    atatat {
   1850  1.136    atatat 	extern struct ifqueue ipintrq;
   1851  1.136    atatat 
   1852  1.139    atatat 	sysctl_net_ifq_setup(clog, PF_INET, "inet", IPPROTO_IP, "ip",
   1853  1.136    atatat 			     IPCTL_IFQ, &ipintrq);
   1854  1.133  jonathan }
   1855  1.136    atatat #endif /* INET */
   1856  1.133  jonathan 
   1857  1.136    atatat #ifdef INET6
   1858  1.136    atatat SYSCTL_SETUP(sysctl_net_inet6_ip6_ifq_setup,
   1859  1.136    atatat 	     "sysctl net.inet6.ip6.ifq subtree setup")
   1860  1.136    atatat {
   1861  1.136    atatat 	extern struct ifqueue ip6intrq;
   1862  1.136    atatat 
   1863  1.139    atatat 	sysctl_net_ifq_setup(clog, PF_INET6, "inet6", IPPROTO_IPV6, "ip6",
   1864  1.136    atatat 			     IPV6CTL_IFQ, &ip6intrq);
   1865  1.136    atatat }
   1866  1.136    atatat #endif /* INET6 */
   1867  1.138  drochner #endif /* INET || INET6 */
   1868