2a0c503e7a
This is because calls with M_WAIT (now M_TRYWAIT) may not wait forever when nothing is available for allocation, and may end up returning NULL. Hopefully we now communicate more of the right thing to developers and make it very clear that it's necessary to check whether calls with M_(TRY)WAIT also resulted in a failed allocation. M_TRYWAIT basically means "try harder, block if necessary, but don't necessarily wait forever." The time spent blocking is tunable with the kern.ipc.mbuf_wait sysctl. M_WAIT is now deprecated but still defined for the next little while. * Fix a typo in a comment in mbuf.h * Fix some code that was actually passing the mbuf subsystem's M_WAIT to malloc(). Made it pass M_WAITOK instead. If we were ever to redefine the value of the M_WAIT flag, this could have became a big problem.
868 lines
21 KiB
C
868 lines
21 KiB
C
/*
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|
* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
|
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include "opt_atalk.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipx.h"
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#include "opt_bdg.h"
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#include "opt_netgraph.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <net/if_llc.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/if_ether.h>
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#endif
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#ifdef INET6
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#include <netinet6/nd6.h>
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#endif
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|
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|
#ifdef IPX
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#include <netipx/ipx.h>
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#include <netipx/ipx_if.h>
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int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
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int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
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struct sockaddr *dst, short *tp, int *hlen);
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#endif
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|
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|
#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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ushort ns_nettype;
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int ether_outputdebug = 0;
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int ether_inputdebug = 0;
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#endif
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|
|
|
#ifdef NETATALK
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#include <netatalk/at.h>
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#include <netatalk/at_var.h>
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#include <netatalk/at_extern.h>
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|
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|
#define llc_snap_org_code llc_un.type_snap.org_code
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#define llc_snap_ether_type llc_un.type_snap.ether_type
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|
|
|
extern u_char at_org_code[3];
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extern u_char aarp_org_code[3];
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#endif /* NETATALK */
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|
|
|
#ifdef BRIDGE
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#include <net/bridge.h>
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#endif
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|
|
|
#include "vlan.h"
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#if NVLAN > 0
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#include <net/if_vlan_var.h>
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#endif /* NVLAN > 0 */
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|
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/* netgraph node hooks for ng_ether(4) */
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void (*ng_ether_input_p)(struct ifnet *ifp,
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struct mbuf **mp, struct ether_header *eh);
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void (*ng_ether_input_orphan_p)(struct ifnet *ifp,
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struct mbuf *m, struct ether_header *eh);
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int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
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void (*ng_ether_attach_p)(struct ifnet *ifp);
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void (*ng_ether_detach_p)(struct ifnet *ifp);
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|
|
|
static int ether_resolvemulti __P((struct ifnet *, struct sockaddr **,
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struct sockaddr *));
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u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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#define senderr(e) do { error = (e); goto bad;} while (0)
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#define IFP2AC(IFP) ((struct arpcom *)IFP)
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|
|
|
/*
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* Ethernet output routine.
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* Encapsulate a packet of type family for the local net.
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* Use trailer local net encapsulation if enough data in first
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* packet leaves a multiple of 512 bytes of data in remainder.
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* Assumes that ifp is actually pointer to arpcom structure.
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*/
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int
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ether_output(ifp, m, dst, rt0)
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register struct ifnet *ifp;
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struct mbuf *m;
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struct sockaddr *dst;
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struct rtentry *rt0;
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{
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short type;
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int error = 0, hdrcmplt = 0;
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u_char esrc[6], edst[6];
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register struct rtentry *rt;
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register struct ether_header *eh;
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int off, loop_copy = 0;
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int hlen; /* link layer header lenght */
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struct arpcom *ac = IFP2AC(ifp);
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if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
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senderr(ENETDOWN);
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rt = rt0;
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if (rt) {
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if ((rt->rt_flags & RTF_UP) == 0) {
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rt0 = rt = rtalloc1(dst, 1, 0UL);
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if (rt0)
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rt->rt_refcnt--;
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else
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senderr(EHOSTUNREACH);
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}
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if (rt->rt_flags & RTF_GATEWAY) {
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if (rt->rt_gwroute == 0)
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goto lookup;
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if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
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rtfree(rt); rt = rt0;
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lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1,
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0UL);
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if ((rt = rt->rt_gwroute) == 0)
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senderr(EHOSTUNREACH);
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}
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}
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if (rt->rt_flags & RTF_REJECT)
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if (rt->rt_rmx.rmx_expire == 0 ||
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time_second < rt->rt_rmx.rmx_expire)
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senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
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}
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hlen = ETHER_HDR_LEN;
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switch (dst->sa_family) {
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#ifdef INET
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case AF_INET:
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if (!arpresolve(ac, rt, m, dst, edst, rt0))
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return (0); /* if not yet resolved */
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off = m->m_pkthdr.len - m->m_len;
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type = htons(ETHERTYPE_IP);
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) {
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/* this must be impossible, so we bark */
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printf("nd6_storelladdr failed\n");
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return(0);
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}
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off = m->m_pkthdr.len - m->m_len;
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type = htons(ETHERTYPE_IPV6);
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break;
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#endif
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#ifdef IPX
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case AF_IPX:
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if (ef_outputp) {
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error = ef_outputp(ifp, &m, dst, &type, &hlen);
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if (error)
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goto bad;
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} else
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type = htons(ETHERTYPE_IPX);
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bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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break;
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#endif
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#ifdef NETATALK
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case AF_APPLETALK:
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{
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struct at_ifaddr *aa;
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if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) {
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goto bad;
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}
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if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst))
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return (0);
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/*
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* In the phase 2 case, need to prepend an mbuf for the llc header.
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* Since we must preserve the value of m, which is passed to us by
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* value, we m_copy() the first mbuf, and use it for our llc header.
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*/
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if ( aa->aa_flags & AFA_PHASE2 ) {
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struct llc llc;
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M_PREPEND(m, sizeof(struct llc), M_TRYWAIT);
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llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
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llc.llc_control = LLC_UI;
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bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code));
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llc.llc_snap_ether_type = htons( ETHERTYPE_AT );
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bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc));
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type = htons(m->m_pkthdr.len);
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hlen = sizeof(struct llc) + ETHER_HDR_LEN;
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} else {
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type = htons(ETHERTYPE_AT);
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}
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break;
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}
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#endif NETATALK
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#ifdef NS
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case AF_NS:
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switch(ns_nettype){
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default:
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case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
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type = 0x8137;
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break;
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case 0x0: /* Novell 802.3 */
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type = htons( m->m_pkthdr.len);
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break;
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case 0xe0e0: /* Novell 802.2 and Token-Ring */
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M_PREPEND(m, 3, M_TRYWAIT);
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type = htons( m->m_pkthdr.len);
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cp = mtod(m, u_char *);
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*cp++ = 0xE0;
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*cp++ = 0xE0;
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*cp++ = 0x03;
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break;
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}
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bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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/*
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* XXX if ns_thishost is the same as the node's ethernet
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* address then just the default code will catch this anyhow.
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* So I'm not sure if this next clause should be here at all?
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* [JRE]
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*/
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if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))){
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m->m_pkthdr.rcvif = ifp;
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inq = &nsintrq;
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if (IF_HANDOFF(inq, m, NULL))
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schednetisr(NETISR_NS);
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return (error);
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}
|
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if (!bcmp((caddr_t)edst, (caddr_t)&ns_broadhost, sizeof(edst))){
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m->m_flags |= M_BCAST;
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}
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|
break;
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#endif /* NS */
|
|
|
|
case pseudo_AF_HDRCMPLT:
|
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hdrcmplt = 1;
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eh = (struct ether_header *)dst->sa_data;
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(void)memcpy(esrc, eh->ether_shost, sizeof (esrc));
|
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/* FALLTHROUGH */
|
|
|
|
case AF_UNSPEC:
|
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loop_copy = -1; /* if this is for us, don't do it */
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eh = (struct ether_header *)dst->sa_data;
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(void)memcpy(edst, eh->ether_dhost, sizeof (edst));
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type = eh->ether_type;
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break;
|
|
|
|
default:
|
|
printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
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dst->sa_family);
|
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senderr(EAFNOSUPPORT);
|
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}
|
|
|
|
/*
|
|
* Add local net header. If no space in first mbuf,
|
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* allocate another.
|
|
*/
|
|
M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
|
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if (m == 0)
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|
senderr(ENOBUFS);
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eh = mtod(m, struct ether_header *);
|
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(void)memcpy(&eh->ether_type, &type,
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sizeof(eh->ether_type));
|
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(void)memcpy(eh->ether_dhost, edst, sizeof (edst));
|
|
if (hdrcmplt)
|
|
(void)memcpy(eh->ether_shost, esrc,
|
|
sizeof(eh->ether_shost));
|
|
else
|
|
(void)memcpy(eh->ether_shost, ac->ac_enaddr,
|
|
sizeof(eh->ether_shost));
|
|
|
|
/*
|
|
* If a simplex interface, and the packet is being sent to our
|
|
* Ethernet address or a broadcast address, loopback a copy.
|
|
* XXX To make a simplex device behave exactly like a duplex
|
|
* device, we should copy in the case of sending to our own
|
|
* ethernet address (thus letting the original actually appear
|
|
* on the wire). However, we don't do that here for security
|
|
* reasons and compatibility with the original behavior.
|
|
*/
|
|
if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
|
|
if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
|
|
struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
|
|
|
|
(void) if_simloop(ifp, n, dst->sa_family, hlen);
|
|
} else if (bcmp(eh->ether_dhost,
|
|
eh->ether_shost, ETHER_ADDR_LEN) == 0) {
|
|
(void) if_simloop(ifp, m, dst->sa_family, hlen);
|
|
return (0); /* XXX */
|
|
}
|
|
}
|
|
|
|
/* Handle ng_ether(4) processing, if any */
|
|
if (ng_ether_output_p != NULL) {
|
|
if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) {
|
|
bad: if (m != NULL)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
if (m == NULL)
|
|
return (0);
|
|
}
|
|
|
|
/* Continue with link-layer output */
|
|
return ether_output_frame(ifp, m);
|
|
}
|
|
|
|
/*
|
|
* Ethernet link layer output routine to send a raw frame to the device.
|
|
*
|
|
* This assumes that the 14 byte Ethernet header is present and contiguous
|
|
* in the first mbuf (if BRIDGE'ing).
|
|
*/
|
|
int
|
|
ether_output_frame(ifp, m)
|
|
struct ifnet *ifp;
|
|
struct mbuf *m;
|
|
{
|
|
int error = 0;
|
|
|
|
#ifdef BRIDGE
|
|
if (do_bridge) {
|
|
struct ether_header hdr;
|
|
|
|
m->m_pkthdr.rcvif = NULL;
|
|
bcopy(mtod(m, struct ether_header *), &hdr, ETHER_HDR_LEN);
|
|
m_adj(m, ETHER_HDR_LEN);
|
|
ifp = bridge_dst_lookup(&hdr);
|
|
bdg_forward(&m, &hdr, ifp);
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Queue message on interface, update output statistics if
|
|
* successful, and start output if interface not yet active.
|
|
*/
|
|
if (! IF_HANDOFF(&ifp->if_snd, m, ifp))
|
|
return (ENOBUFS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Process a received Ethernet packet;
|
|
* the packet is in the mbuf chain m without
|
|
* the ether header, which is provided separately.
|
|
*
|
|
* First we perform any link layer operations, then continue
|
|
* to the upper layers with ether_demux().
|
|
*/
|
|
void
|
|
ether_input(ifp, eh, m)
|
|
struct ifnet *ifp;
|
|
struct ether_header *eh;
|
|
struct mbuf *m;
|
|
{
|
|
|
|
/* Check for a BPF tap */
|
|
if (ifp->if_bpf != NULL) {
|
|
struct m_hdr mh;
|
|
|
|
/* This kludge is OK; BPF treats the "mbuf" as read-only */
|
|
mh.mh_next = m;
|
|
mh.mh_data = (char *)eh;
|
|
mh.mh_len = ETHER_HDR_LEN;
|
|
bpf_mtap(ifp, (struct mbuf *)&mh);
|
|
}
|
|
|
|
/* Handle ng_ether(4) processing, if any */
|
|
if (ng_ether_input_p != NULL) {
|
|
(*ng_ether_input_p)(ifp, &m, eh);
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
#ifdef BRIDGE
|
|
/* Check for bridging mode */
|
|
if (do_bridge) {
|
|
struct ifnet *bif;
|
|
|
|
/* Check with bridging code */
|
|
if ((bif = bridge_in(ifp, eh)) == BDG_DROP) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
if (bif != BDG_LOCAL) {
|
|
bdg_forward(&m, eh, bif); /* needs forwarding */
|
|
/*
|
|
* Do not continue if bdg_forward() processed our
|
|
* packet (and cleared the mbuf pointer m) or if
|
|
* it dropped (m_free'd) the packet itself.
|
|
*/
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
if (bif == BDG_LOCAL
|
|
|| bif == BDG_BCAST
|
|
|| bif == BDG_MCAST)
|
|
goto recvLocal; /* receive locally */
|
|
|
|
/* If not local and not multicast, just drop it */
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/* Discard packet if upper layers shouldn't see it. This should
|
|
only happen when the interface is in promiscuous mode. */
|
|
if ((ifp->if_flags & IFF_PROMISC) != 0
|
|
&& (eh->ether_dhost[0] & 1) == 0
|
|
&& bcmp(eh->ether_dhost,
|
|
IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
#ifdef BRIDGE
|
|
recvLocal:
|
|
#endif
|
|
/* Continue with upper layer processing */
|
|
ether_demux(ifp, eh, m);
|
|
}
|
|
|
|
/*
|
|
* Upper layer processing for a received Ethernet packet.
|
|
*/
|
|
void
|
|
ether_demux(ifp, eh, m)
|
|
struct ifnet *ifp;
|
|
struct ether_header *eh;
|
|
struct mbuf *m;
|
|
{
|
|
struct ifqueue *inq;
|
|
u_short ether_type;
|
|
#if defined(NETATALK)
|
|
register struct llc *l;
|
|
#endif
|
|
|
|
/* Discard packet if interface is not up */
|
|
if ((ifp->if_flags & IFF_UP) == 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
|
|
if (eh->ether_dhost[0] & 1) {
|
|
if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
|
|
sizeof(etherbroadcastaddr)) == 0)
|
|
m->m_flags |= M_BCAST;
|
|
else
|
|
m->m_flags |= M_MCAST;
|
|
}
|
|
if (m->m_flags & (M_BCAST|M_MCAST))
|
|
ifp->if_imcasts++;
|
|
|
|
ether_type = ntohs(eh->ether_type);
|
|
|
|
#if NVLAN > 0
|
|
if (ether_type == vlan_proto) {
|
|
if (vlan_input(eh, m) < 0)
|
|
ifp->if_data.ifi_noproto++;
|
|
return;
|
|
}
|
|
#endif /* NVLAN > 0 */
|
|
|
|
switch (ether_type) {
|
|
#ifdef INET
|
|
case ETHERTYPE_IP:
|
|
if (ipflow_fastforward(m))
|
|
return;
|
|
schednetisr(NETISR_IP);
|
|
inq = &ipintrq;
|
|
break;
|
|
|
|
case ETHERTYPE_ARP:
|
|
schednetisr(NETISR_ARP);
|
|
inq = &arpintrq;
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
case ETHERTYPE_IPX:
|
|
if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
|
|
return;
|
|
schednetisr(NETISR_IPX);
|
|
inq = &ipxintrq;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
schednetisr(NETISR_IPV6);
|
|
inq = &ip6intrq;
|
|
break;
|
|
#endif
|
|
#ifdef NS
|
|
case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
|
|
schednetisr(NETISR_NS);
|
|
inq = &nsintrq;
|
|
break;
|
|
|
|
#endif /* NS */
|
|
#ifdef NETATALK
|
|
case ETHERTYPE_AT:
|
|
schednetisr(NETISR_ATALK);
|
|
inq = &atintrq1;
|
|
break;
|
|
case ETHERTYPE_AARP:
|
|
/* probably this should be done with a NETISR as well */
|
|
aarpinput(IFP2AC(ifp), m); /* XXX */
|
|
return;
|
|
#endif NETATALK
|
|
default:
|
|
#ifdef IPX
|
|
if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
|
|
return;
|
|
#endif /* IPX */
|
|
#ifdef NS
|
|
checksum = mtod(m, ushort *);
|
|
/* Novell 802.3 */
|
|
if ((ether_type <= ETHERMTU) &&
|
|
((*checksum == 0xffff) || (*checksum == 0xE0E0))){
|
|
if(*checksum == 0xE0E0) {
|
|
m->m_pkthdr.len -= 3;
|
|
m->m_len -= 3;
|
|
m->m_data += 3;
|
|
}
|
|
schednetisr(NETISR_NS);
|
|
inq = &nsintrq;
|
|
break;
|
|
}
|
|
#endif /* NS */
|
|
#if defined(NETATALK)
|
|
if (ether_type > ETHERMTU)
|
|
goto dropanyway;
|
|
l = mtod(m, struct llc *);
|
|
switch (l->llc_dsap) {
|
|
case LLC_SNAP_LSAP:
|
|
switch (l->llc_control) {
|
|
case LLC_UI:
|
|
if (l->llc_ssap != LLC_SNAP_LSAP)
|
|
goto dropanyway;
|
|
|
|
if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code,
|
|
sizeof(at_org_code)) == 0 &&
|
|
ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
|
|
inq = &atintrq2;
|
|
m_adj( m, sizeof( struct llc ));
|
|
schednetisr(NETISR_ATALK);
|
|
break;
|
|
}
|
|
|
|
if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
|
|
sizeof(aarp_org_code)) == 0 &&
|
|
ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
|
|
m_adj( m, sizeof( struct llc ));
|
|
aarpinput(IFP2AC(ifp), m); /* XXX */
|
|
return;
|
|
}
|
|
|
|
default:
|
|
goto dropanyway;
|
|
}
|
|
break;
|
|
dropanyway:
|
|
default:
|
|
if (ng_ether_input_orphan_p != NULL)
|
|
(*ng_ether_input_orphan_p)(ifp, m, eh);
|
|
else
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
#else /* NETATALK */
|
|
if (ng_ether_input_orphan_p != NULL)
|
|
(*ng_ether_input_orphan_p)(ifp, m, eh);
|
|
else
|
|
m_freem(m);
|
|
return;
|
|
#endif /* NETATALK */
|
|
}
|
|
|
|
(void) IF_HANDOFF(inq, m, NULL);
|
|
}
|
|
|
|
/*
|
|
* Perform common duties while attaching to interface list
|
|
*/
|
|
void
|
|
ether_ifattach(ifp, bpf)
|
|
register struct ifnet *ifp;
|
|
int bpf;
|
|
{
|
|
register struct ifaddr *ifa;
|
|
register struct sockaddr_dl *sdl;
|
|
|
|
if_attach(ifp);
|
|
ifp->if_type = IFT_ETHER;
|
|
ifp->if_addrlen = 6;
|
|
ifp->if_hdrlen = 14;
|
|
ifp->if_mtu = ETHERMTU;
|
|
ifp->if_resolvemulti = ether_resolvemulti;
|
|
if (ifp->if_baudrate == 0)
|
|
ifp->if_baudrate = 10000000;
|
|
ifa = ifnet_addrs[ifp->if_index - 1];
|
|
KASSERT(ifa != NULL, ("%s: no lladdr!\n", __FUNCTION__));
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
sdl->sdl_type = IFT_ETHER;
|
|
sdl->sdl_alen = ifp->if_addrlen;
|
|
bcopy((IFP2AC(ifp))->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
|
|
if (bpf)
|
|
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
|
|
if (ng_ether_attach_p != NULL)
|
|
(*ng_ether_attach_p)(ifp);
|
|
#ifdef BRIDGE
|
|
bdgtakeifaces();
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Perform common duties while detaching an Ethernet interface
|
|
*/
|
|
void
|
|
ether_ifdetach(ifp, bpf)
|
|
struct ifnet *ifp;
|
|
int bpf;
|
|
{
|
|
if (ng_ether_detach_p != NULL)
|
|
(*ng_ether_detach_p)(ifp);
|
|
if (bpf)
|
|
bpfdetach(ifp);
|
|
if_detach(ifp);
|
|
#ifdef BRIDGE
|
|
bdgtakeifaces();
|
|
#endif
|
|
}
|
|
|
|
SYSCTL_DECL(_net_link);
|
|
SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
|
|
|
|
int
|
|
ether_ioctl(ifp, command, data)
|
|
struct ifnet *ifp;
|
|
int command;
|
|
caddr_t data;
|
|
{
|
|
struct ifaddr *ifa = (struct ifaddr *) data;
|
|
struct ifreq *ifr = (struct ifreq *) data;
|
|
int error = 0;
|
|
|
|
switch (command) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
ifp->if_init(ifp->if_softc); /* before arpwhohas */
|
|
arp_ifinit(IFP2AC(ifp), ifa);
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
/*
|
|
* XXX - This code is probably wrong
|
|
*/
|
|
case AF_IPX:
|
|
{
|
|
register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
|
|
struct arpcom *ac = IFP2AC(ifp);
|
|
|
|
if (ipx_nullhost(*ina))
|
|
ina->x_host =
|
|
*(union ipx_host *)
|
|
ac->ac_enaddr;
|
|
else {
|
|
bcopy((caddr_t) ina->x_host.c_host,
|
|
(caddr_t) ac->ac_enaddr,
|
|
sizeof(ac->ac_enaddr));
|
|
}
|
|
|
|
/*
|
|
* Set new address
|
|
*/
|
|
ifp->if_init(ifp->if_softc);
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef NS
|
|
/*
|
|
* XXX - This code is probably wrong
|
|
*/
|
|
case AF_NS:
|
|
{
|
|
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
|
|
struct arpcom *ac = IFP2AC(ifp);
|
|
|
|
if (ns_nullhost(*ina))
|
|
ina->x_host =
|
|
*(union ns_host *) (ac->ac_enaddr);
|
|
else {
|
|
bcopy((caddr_t) ina->x_host.c_host,
|
|
(caddr_t) ac->ac_enaddr,
|
|
sizeof(ac->ac_enaddr));
|
|
}
|
|
|
|
/*
|
|
* Set new address
|
|
*/
|
|
ifp->if_init(ifp->if_softc);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
ifp->if_init(ifp->if_softc);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFADDR:
|
|
{
|
|
struct sockaddr *sa;
|
|
|
|
sa = (struct sockaddr *) & ifr->ifr_data;
|
|
bcopy(IFP2AC(ifp)->ac_enaddr,
|
|
(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
/*
|
|
* Set the interface MTU.
|
|
*/
|
|
if (ifr->ifr_mtu > ETHERMTU) {
|
|
error = EINVAL;
|
|
} else {
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
}
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
ether_resolvemulti(ifp, llsa, sa)
|
|
struct ifnet *ifp;
|
|
struct sockaddr **llsa;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct sockaddr_dl *sdl;
|
|
struct sockaddr_in *sin;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
u_char *e_addr;
|
|
|
|
switch(sa->sa_family) {
|
|
case AF_LINK:
|
|
/*
|
|
* No mapping needed. Just check that it's a valid MC address.
|
|
*/
|
|
sdl = (struct sockaddr_dl *)sa;
|
|
e_addr = LLADDR(sdl);
|
|
if ((e_addr[0] & 1) != 1)
|
|
return EADDRNOTAVAIL;
|
|
*llsa = 0;
|
|
return 0;
|
|
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *)sa;
|
|
if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
|
|
return EADDRNOTAVAIL;
|
|
MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
|
|
M_WAITOK);
|
|
sdl->sdl_len = sizeof *sdl;
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_index = ifp->if_index;
|
|
sdl->sdl_type = IFT_ETHER;
|
|
sdl->sdl_nlen = 0;
|
|
sdl->sdl_alen = ETHER_ADDR_LEN;
|
|
sdl->sdl_slen = 0;
|
|
e_addr = LLADDR(sdl);
|
|
ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
|
|
*llsa = (struct sockaddr *)sdl;
|
|
return 0;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
/*
|
|
* An IP6 address of 0 means listen to all
|
|
* of the Ethernet multicast address used for IP6.
|
|
* (This is used for multicast routers.)
|
|
*/
|
|
ifp->if_flags |= IFF_ALLMULTI;
|
|
*llsa = 0;
|
|
return 0;
|
|
}
|
|
if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
|
|
return EADDRNOTAVAIL;
|
|
MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
|
|
M_WAITOK);
|
|
sdl->sdl_len = sizeof *sdl;
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_index = ifp->if_index;
|
|
sdl->sdl_type = IFT_ETHER;
|
|
sdl->sdl_nlen = 0;
|
|
sdl->sdl_alen = ETHER_ADDR_LEN;
|
|
sdl->sdl_slen = 0;
|
|
e_addr = LLADDR(sdl);
|
|
ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
|
|
*llsa = (struct sockaddr *)sdl;
|
|
return 0;
|
|
#endif
|
|
|
|
default:
|
|
/*
|
|
* Well, the text isn't quite right, but it's the name
|
|
* that counts...
|
|
*/
|
|
return EAFNOSUPPORT;
|
|
}
|
|
}
|
|
|