if.c

VXWORKS源代码

/* if.c - network interface utility routines */

/* Copyright 1984 - 2002 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
--------------------
01u,25apr02,vvv  removed unused ifAttachChange (SPR #74391)
01t,06mar02,vvv  clean up multicast memberships when interface is detached
		 (SPR #72486)
01s,29oct01,wap  ifconf() fails with unit numbers greater than 9 (SPR #31752)
01r,26oct01,vvv  fixed memory leak in if_dettach (SPR #71081) 
01q,12oct01,rae  merge from truestack ver 01w base 01m
                 SPR #69112, Windview events, etc.
01p,30mar01,rae  allow m2 stuff to be excluded (SPR# 65428)
01o,24oct00,niq  Merging in RFC2233 changes from tor2_0.open_stack-f1 branch.
01n,17oct00,spm  merged from version 01j of tor2_0_x branch (base version 01h):
                 updated if_attach to report memory allocation failures
01m,29apr99,pul  Upgraded NPT phase3 code to tor2.0.0
01l,25mar99,sj   removed logMsg within SIOCSIFASYNCFLAGS ioctl 
01k,24mar99,ead  Added a call to m2SetIfLastChange() in ifioctl() when the
                 interfaces operational status changes. (SPR #23290)
01j,19mar99,sj   SIOCSIFASYNCFLAGS ioctl recvd only when we didn't change flags
01i,18mar99,sj   added SIOCSIFASYNCFLAGS for async flag change report from END
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 "routeEnhLib.h"
#include "net/if_dl.h"
#include "net/if_subr.h"
#include "sys/ioctl.h"
#include "errno.h"

#include "ifIndexLib.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"


#ifdef WV_INSTRUMENTATION
#ifdef INCLUDE_WVNET
#include "wvNetLib.h"
#endif /* INCLUDE_WVNET */
#endif

#ifdef VIRTUAL_STACK
#include "netinet/vsLib.h"
#endif

#include "logLib.h"

IMPORT STATUS netJobAdd (FUNCPTR, int, int, int, int, int);
extern void pfctlinput(int cmd, struct sockaddr * sa);
extern int sysClkRateGet();
extern void in_ifaddr_remove ();
extern int arpioctl (int cmd, caddr_t data); 
extern int splnet2 (int timeout);

/* XXX temporary fix should be removed after updating all drivers */

extern void ether_ifattach(struct ifnet * ifp);
extern int ether_output (); 

#ifndef VIRTUAL_STACK
IMPORT struct inpcbhead         udb;
#endif

#ifndef VIRTUAL_STACK
struct ifnet *ifnet;	/* head of linked list of interfaces */

LOCAL WDOG_ID ifslowtimoWd;	/* watchdog timer for slowtimo routine */

#endif /* VIRTUAL_STACK */

/* locals */
static int ifqmaxlen = IFQ_MAXLEN;
static char * sprint_d(unsigned int, char *, int);

#ifdef WV_INSTRUMENTATION
#ifdef INCLUDE_WVNET
    /* Set common fields of event identifiers for this module. */

LOCAL UCHAR wvNetModuleId = WV_NET_IF_MODULE; 	/* Value for if.c */
LOCAL UCHAR wvNetLocalFilter = WV_NET_NONE; 	/* Available event filter */

LOCAL ULONG wvNetEventId; 	/* Event identifier: see wvNetLib.h */
#endif  /* INCLUDE_WVNET */
#endif

/* forward declarations */
LOCAL void ifMultiDelete (struct ifnet *);

/* globals */

FUNCPTR _m2SetIfLastChange;
FUNCPTR _m2IfTableUpdate;

/*
 * Network interface utility routines.
 *
 * Routines with ifa_ifwith* names take sockaddr *'s as
 * parameters.
 */

void ifinit()
    {
    register struct ifnet *ifp;

#ifdef WV_INSTRUMENTATION
#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */
    WV_NET_MARKER_0 (NET_AUX_EVENT, WV_NET_VERBOSE, 0, 8,
                     WV_NETEVENT_IFINIT_START)
#endif  /* INCLUDE_WVNET */
#endif

#ifdef VIRTUAL_STACK
    if (_ifnet != NULL)
#else
    if (ifnet != NULL)
#endif
        {
#ifdef VIRTUAL_STACK
        for (ifp = _ifnet; ifp; ifp = ifp->if_next)
#else
        for (ifp = ifnet; ifp; ifp = ifp->if_next)
#endif
            if (ifp->if_snd.ifq_maxlen == 0)
                ifp->if_snd.ifq_maxlen = ifqmaxlen;
        }

    /* XXX using watchdogs good idea? -gae */
    ifslowtimoWd = wdCreate ();

#ifdef VIRTUAL_STACK
    if_slowtimo (myStackNum);
#else
    if_slowtimo ();
#endif
    }

/*
 * Actuall interface reset invocation.
 */
void ifreset2 ()

    {
    register struct ifnet *ifp;
    register struct ifnet *ifpnext;

#ifdef VIRTUAL_STACK
    ifp = _ifnet;
#else
    ifp = ifnet;
#endif

    while (ifp)
        {
        ifpnext = ifp->if_next;
        if (ifp->if_reset)
            (*ifp->if_reset)(ifp->if_unit);
        ifp = ifpnext;
        }
    }

/*
 * Call each interface on a reset.
 */
void ifreset ()

    {

    int 	s;

#ifdef WV_INSTRUMENTATION
#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */
    WV_NET_MARKER_0 (NET_AUX_EVENT, WV_NET_VERBOSE, 1, 9,
                         WV_NETEVENT_IFRESET_START)
#endif  /* INCLUDE_WVNET */
#endif

    s = splnet ();
    ifreset2();
    splx (s);
    }

/*
 * For rebootHook use only - Immediate i/f reset
 *
 * WARNING:  Calling this routine that does not wait spl semaphore
 * is a violation of mutual exclusion and will cause problems in a
 * running system.
 * This routine should only be used if the system is being rebooted
 * (i.e. when called from a reboot hook) or if the application has
 * very specific knowledge of the state of all ENDs in the system.
 */
void ifresetImmediate ()

    {
    int 	s;

#ifdef WV_INSTRUMENTATION
#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */
    WV_NET_MARKER_0 (NET_AUX_EVENT, WV_NET_VERBOSE, 1, 9,
                         WV_NETEVENT_IFRESET_START)
#endif  /* INCLUDE_WVNET */
#endif

    s = splnet2 (0); /* don't wait spl semaphore */
    ifreset2();
    splx(s);
    }

/*
 * Attach an interface to the list of "active" interfaces.
 */

STATUS if_attach(ifp)
    struct ifnet *ifp;
    {
    unsigned socksize, ifasize;
    int namelen, unitlen, masklen;
    char workbuf[12], *unitname;
#ifdef VIRTUAL_STACK
    register struct ifnet **p = &_ifnet;
#else
    register struct ifnet **p = &ifnet;
#endif
    register struct sockaddr_dl *sdl;
    register struct ifaddr *ifa;
    extern void link_rtrequest();
    int 	s;

#ifdef WV_INSTRUMENTATION
#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */
    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 2, 10,
                     WV_NETEVENT_IFATTACH_START, ifp)
#endif  /* INCLUDE_WVNET */
#endif

    /* 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;
	
    /*
     * 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 (ERROR);

    /* Make interface globally visible after all memory is allocated. */

    s = splnet ();
    while (*p)
        p = &((*p)->if_next);
    splx (s);

    *p = ifp;

    ifp->if_index = ifIndexAlloc();

    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;
    if (_m2IfTableUpdate)
        _m2IfTableUpdate(ifp, M2_IF_TABLE_INSERT, 0, 0);

    /* XXX Temporary fix before changing ethernet drivers */

    s = splnet ();
    if (ifp->if_output == ether_output)
	ether_ifattach (ifp);
    splx (s);

    return (OK);
    }

/***************************************************************************
*
* 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;

#ifdef WV_INSTRUMENTATION
#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */
    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 3, 11,
                     WV_NETEVENT_IFDETACH_START, ifp)
#endif  /* INCLUDE_WVNET */
#endif

#ifdef VIRTUAL_STACK
    pPtrIfp = &_ifnet;
#else
    pPtrIfp = &ifnet;
#endif

    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
		    IFAFREE (pIfAddr);
		}
#ifdef INET
            if ((*pPtrIfp)->pInmMblk != NULL)
                in_delmulti ((*pPtrIfp)->pInmMblk, NULL);

	    if (ifp->if_flags & IFF_MULTICAST)
                ifMultiDelete (ifp);
#endif /* INET */