/* if.c - network interface utility routines *//* Copyright 1984-1996 Wind River Systems, Inc. */#include "copyright_wrs.h"/*	$NetBSD: if.c,v 1.18 1994/10/30 21:48:46 cgd Exp $	*//* * Copyright (c) 1980, 1986, 1993 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *	@(#)if.c	8.3 (Berkeley) 1/4/94 *//*modification history--------------------01j,10mar00,ann  Added the callback to the m2Lib routine01i,24mar99,ead  Added a call to m2SetIfLastChange() in ifioctl() when the                 interfaces operational status changes. (SPR #23290)01h,16jul98,n_s  fixed ifioctl to pass correct flags to driver Ioctl. SPR 21124 01g,16dec97,vin  fixed if_dettach SPR 9970.01f,10dec97,vin  added spl protection to ifreset, if_dettach, if_attach,		 ifIndexToIfp SPR 9987.01e,05oct97,vin  fixed if_dettach, for changes in multicast code.01d,12aug97,rjc  made if_index global to support non ip interfaces (SPR 9060).01c,02jul97,vin  fixed warnings. added _rtIfaceMsgHook for scaling out routing		 sockets.01b,05dec96,vin  moved ifafree() from route.c(), added ifIndexToIfp(),		 deleted ifnet_addrs in ifattach(), made if_index static.		 made ifqmaxlen static, replaced calloc with MALLOC, replaced		 free(..) with FREE(..)01a,03mar96,vin  created from BSD4.4 stuff,integrated with 02t of if.c.		 rewrote if_dettach(), added in_ifaddr_remove in if_dettach*//*DESCRIPTION*/#include "vxWorks.h"#include "sys/socket.h"#include "net/socketvar.h"#include "net/protosw.h"#include "net/route.h"#include "net/if_dl.h"#include "net/if_subr.h"#include "sys/ioctl.h"#include "errno.h"#include "net/if.h"#include "wdLib.h"#include "net/systm.h"#include "net/mbuf.h"#ifdef INET#include "netinet/in_var.h"#endif /* INET */#include "m2Lib.h"IMPORT void netJobAdd ();extern pfctlinput(int cmd, struct sockaddr * sa);extern sysClkRateGet();extern void in_ifaddr_remove ();extern arpioctl (int cmd, caddr_t data); /* XXX temporary fix should be removed after updating all drivers */extern void ether_ifattach(struct ifnet * ifp);extern int ether_output (); int ifAttachChange;	/* Set when a change in the Net I/F list occurs */struct ifnet *ifnet;	/* head of linked list of interfaces *//* locals */LOCAL WDOG_ID ifslowtimoWd;	/* watchdog timer for slowtimo routine */static int ifqmaxlen = IFQ_MAXLEN;static char * sprint_d(unsigned int, char *, int);/* globals */int if_index = 0;/* * Network interface utility routines. * * Routines with ifa_ifwith* names take sockaddr *'s as * parameters. */void ifinit()    {    register struct ifnet *ifp;    for (ifp = ifnet; ifp; ifp = ifp->if_next)	if (ifp->if_snd.ifq_maxlen == 0)	    ifp->if_snd.ifq_maxlen = ifqmaxlen;    /* XXX using watchdogs good idea? -gae */    ifslowtimoWd = wdCreate ();    if_slowtimo ();    }/* * Call each interface on a reset. */void ifreset ()    {    register struct ifnet *ifp;    int 	s;    s = splnet ();    for (ifp = ifnet; ifp; ifp = ifp->if_next)	if (ifp->if_reset)	    (*ifp->if_reset)(ifp->if_unit);    splx (s);    }/* * Attach an interface to the list of "active" interfaces. */void if_attach(ifp)    struct ifnet *ifp;    {    unsigned socksize, ifasize;    int namelen, unitlen, masklen;    char workbuf[12], *unitname;    register struct ifnet **p = &ifnet;    register struct sockaddr_dl *sdl;    register struct ifaddr *ifa;    extern void link_rtrequest();    int 	s;    /* make interface not use trailer protocol by default */	    ifp->if_flags |= IFF_NOTRAILERS;    /* make send queue maxlen be default if none specified;     * this relaxes the requirement that all interfaces be attached     * before calling ifinit */	    if (ifp->if_snd.ifq_maxlen == 0)	ifp->if_snd.ifq_maxlen = ifqmaxlen;	    s = splnet ();    while (*p)	p = &((*p)->if_next);    splx (s);    *p = ifp;    /* Notify MIB-II of change */	    ifAttachChange++;    ifp->if_index = ++if_index;    /*     * create a Link Level name for this device     */    unitname = sprint_d((u_int)ifp->if_unit, workbuf, sizeof(workbuf));    namelen = strlen(ifp->if_name);    unitlen = strlen(unitname);#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))    masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) +    unitlen + namelen;    socksize = masklen + ifp->if_addrlen;#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))    socksize = ROUNDUP(socksize);    if (socksize < sizeof(*sdl))	socksize = sizeof(*sdl);    ifasize = sizeof(*ifa) + 2 * socksize;    MALLOC (ifa, struct ifaddr *, ifasize, MT_IFADDR, M_WAIT);     if (ifa == 0)	return;    bzero((caddr_t)ifa, ifasize);    sdl = (struct sockaddr_dl *)(ifa + 1);    sdl->sdl_len = socksize;    sdl->sdl_family = AF_LINK;    bcopy(ifp->if_name, sdl->sdl_data, namelen);    bcopy(unitname, namelen + (caddr_t)sdl->sdl_data, unitlen);    sdl->sdl_nlen = (namelen += unitlen);    sdl->sdl_index = ifp->if_index;    sdl->sdl_type = ifp->if_type;    ifa->ifa_ifp = ifp;    ifa->ifa_next = ifp->if_addrlist;    ifa->ifa_rtrequest = link_rtrequest;    ifp->if_addrlist = ifa;    ifa->ifa_addr = (struct sockaddr *)sdl;    sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);    ifa->ifa_netmask = (struct sockaddr *)sdl;    sdl->sdl_len = masklen;    while (namelen != 0)	sdl->sdl_data[--namelen] = 0xff;    m2IfTableUpdate(ifp, M2_IF_TABLE_INSERT);    /* XXX Temporary fix before changing ethernet drivers */    s = splnet ();    if (ifp->if_output == ether_output)	ether_ifattach (ifp);    splx (s);    }/***************************************************************************** if_dettach - dettaches an interface from the linked list of interfaces** if_dettach is used to dettach an interface from the linked list of* all available interfaces.  This function needs to be used with* if_down () when shutting down a network interface.*/void if_dettach (ifp)    struct ifnet *ifp;			/* inteface pointer */    {    FAST struct ifnet **	pPtrIfp;    FAST struct ifaddr * 	pIfAddr;    FAST struct ifaddr **	pPtrIfAddr;    int 	s;    pPtrIfp = &ifnet; 		    s = splnet ();    while (*pPtrIfp != NULL)	{	if (*pPtrIfp == ifp)	    {	    pPtrIfAddr = &(*pPtrIfp)->if_addrlist; 	    while (*pPtrIfAddr != NULL)		{		pIfAddr = *pPtrIfAddr; 				*pPtrIfAddr = (*pPtrIfAddr)->ifa_next; #ifdef INET 		if (pIfAddr->ifa_addr->sa_family == AF_INET)		    in_ifaddr_remove (pIfAddr); 		else #endif /* INET */		    {		    IFAFREE (pIfAddr);		    }		}#ifdef INET            if ((*pPtrIfp)->pInmMblk != NULL)                in_delmulti ((*pPtrIfp)->pInmMblk, NULL);#endif /* INET */	    *pPtrIfp = (*pPtrIfp)->if_next; 	    break; 	    }	pPtrIfp = &(*pPtrIfp)->if_next; 	}    /* Notify MIB-II of change */    ifAttachChange++;    m2IfTableUpdate(ifp, M2_IF_TABLE_REMOVE);    splx (s);    }/********************************************************************************* ifIndexToIfp - obtain the ifnet pointer from the index** This function obtains the ifnet pointer from the if_index.* The interface index is unique for every new interface added.* * NOMANUAL** RETURNS ifnet/NULL*/struct ifnet * ifIndexToIfp    (    int		ifIndex		/* index of the interface to find */    )    {    register struct ifnet * 	pIfp = NULL;    int 	s;    /* traverse the list of ifnet structures in the system */    s = splnet ();    for (pIfp = ifnet; pIfp != NULL; pIfp = pIfp->if_next)	{	if (pIfp->if_index == ifIndex)	    break;	}    splx (s);    return (pIfp);     }/* * Locate an interface based on a complete address. *//*ARGSUSED*/struct ifaddr *ifa_ifwithaddr(addr)	register struct sockaddr *addr;{	register struct ifnet *ifp;	register struct ifaddr *ifa;#define	equal(a1, a2) \  (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)	for (ifp = ifnet; ifp; ifp = ifp->if_next)	    for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {		if (ifa->ifa_addr->sa_family != addr->sa_family)			continue;		if (equal(addr, ifa->ifa_addr))			return (ifa);		if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&		    equal(ifa->ifa_broadaddr, addr))			return (ifa);	}	return ((struct ifaddr *)0);}/* * Locate the point to point interface with a given destination address. *//*ARGSUSED*/struct ifaddr *ifa_ifwithdstaddr(addr)	register struct sockaddr *addr;{	register struct ifnet *ifp;	register struct ifaddr *ifa;	for (ifp = ifnet; ifp; ifp = ifp->if_next) 	    if (ifp->if_flags & IFF_POINTOPOINT)		for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {			if (ifa->ifa_addr->sa_family != addr->sa_family)				continue;			if (equal(addr, ifa->ifa_dstaddr))				return (ifa);	}	return ((struct ifaddr *)0);}/* * Find an interface on a specific network.  If many, choice * is most specific found. */struct ifaddr *ifa_ifwithnet(addr)	struct sockaddr *addr;{	register struct ifnet *ifp;	register struct ifaddr *ifa;	struct ifaddr *ifa_maybe = (struct ifaddr *) 0;	u_int af = addr->sa_family;	char *addr_data = addr->sa_data, *cplim;	if (af == AF_LINK) {	    register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;	    /* eliminated need for ifnet_addrs array*/	    	    if (sdl->sdl_index && sdl->sdl_index <= if_index)		{		ifp = ifIndexToIfp (sdl->sdl_index); 		for (ifa = ifp->if_addrlist; ifa != NULL; ifa = ifa->ifa_next)		    if (ifa->ifa_addr->sa_family == af)			break; 		return (ifa); 		}	}	for (ifp = ifnet; ifp; ifp = ifp->if_next)	    for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {		register char *cp, *cp2, *cp3;		if (ifa->ifa_addr->sa_family != af || ifa->ifa_netmask == 0)			next: continue;		cp = addr_data;		cp2 = ifa->ifa_addr->sa_data;		cp3 = ifa->ifa_netmask->sa_data;		cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;		while (cp3 < cplim)			if ((*cp++ ^ *cp2++) & *cp3++)				goto next;		if (ifa_maybe == 0 ||		    rn_refines((caddr_t)ifa->ifa_netmask,		    (caddr_t)ifa_maybe->ifa_netmask))			ifa_maybe = ifa;	    }	return (ifa_maybe);}/* * Find an interface using a specific address family */struct ifaddr *ifa_ifwithaf(af)	register int af;{	register struct ifnet *ifp;	register struct ifaddr *ifa;	for (ifp = ifnet; ifp; ifp = ifp->if_next)	    for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)		if (ifa->ifa_addr->sa_family == af)			return (ifa);	return ((struct ifaddr *)0);}/* * Find an interface address specific to an interface best matching * a given address. */struct ifaddr *ifaof_ifpforaddr(addr, ifp)	struct sockaddr *addr;	register struct ifnet *ifp;{	register struct ifaddr *ifa;	register char *cp, *cp2, *cp3;	register char *cplim;	struct ifaddr *ifa_maybe = 0;	u_int af = addr->sa_family;	if (af >= AF_MAX)		return (0);