Annotation of kernel/bsd/netiso/if_eon.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*-
        !            26:  * Copyright (c) 1991, 1993
        !            27:  *     The Regents of the University of California.  All rights reserved.
        !            28:  *
        !            29:  * Redistribution and use in source and binary forms, with or without
        !            30:  * modification, are permitted provided that the following conditions
        !            31:  * are met:
        !            32:  * 1. Redistributions of source code must retain the above copyright
        !            33:  *    notice, this list of conditions and the following disclaimer.
        !            34:  * 2. Redistributions in binary form must reproduce the above copyright
        !            35:  *    notice, this list of conditions and the following disclaimer in the
        !            36:  *    documentation and/or other materials provided with the distribution.
        !            37:  * 3. All advertising materials mentioning features or use of this software
        !            38:  *    must display the following acknowledgement:
        !            39:  *     This product includes software developed by the University of
        !            40:  *     California, Berkeley and its contributors.
        !            41:  * 4. Neither the name of the University nor the names of its contributors
        !            42:  *    may be used to endorse or promote products derived from this software
        !            43:  *    without specific prior written permission.
        !            44:  *
        !            45:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            46:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            47:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            48:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            49:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            50:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            51:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            52:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            53:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            54:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            55:  * SUCH DAMAGE.
        !            56:  *
        !            57:  *     @(#)if_eon.c    8.1 (Berkeley) 6/10/93
        !            58:  */
        !            59: 
        !            60: /***********************************************************
        !            61:                Copyright IBM Corporation 1987
        !            62: 
        !            63:                       All Rights Reserved
        !            64: 
        !            65: Permission to use, copy, modify, and distribute this software and its 
        !            66: documentation for any purpose and without fee is hereby granted, 
        !            67: provided that the above copyright notice appear in all copies and that
        !            68: both that copyright notice and this permission notice appear in 
        !            69: supporting documentation, and that the name of IBM not be
        !            70: used in advertising or publicity pertaining to distribution of the
        !            71: software without specific, written prior permission.  
        !            72: 
        !            73: IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
        !            74: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
        !            75: IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
        !            76: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            77: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            78: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            79: SOFTWARE.
        !            80: 
        !            81: ******************************************************************/
        !            82: 
        !            83: /*
        !            84:  * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
        !            85:  */
        !            86: /*
        !            87:  *     EON rfc 
        !            88:  *  Layer between IP and CLNL
        !            89:  *
        !            90:  * TODO:
        !            91:  * Put together a current rfc986 address format and get the right offset
        !            92:  * for the nsel
        !            93:  */
        !            94: 
        !            95: #if EON
        !            96: #define NEON 1
        !            97: 
        !            98: 
        !            99: #include <sys/param.h>
        !           100: #include <sys/systm.h>
        !           101: #include <sys/mbuf.h>
        !           102: #include <sys/buf.h>
        !           103: #include <sys/protosw.h>
        !           104: #include <sys/socket.h>
        !           105: #include <sys/ioctl.h>
        !           106: #include <sys/errno.h>
        !           107: #include <sys/types.h>
        !           108: 
        !           109: #include <net/if.h>
        !           110: #include <net/if_types.h>
        !           111: #include <net/if_dl.h>
        !           112: #include <net/netisr.h>
        !           113: #include <net/route.h>
        !           114: #include <machine/mtpr.h>
        !           115: 
        !           116: #include <netinet/in.h>
        !           117: #include <netinet/in_systm.h>
        !           118: #include <netinet/in_var.h>
        !           119: #include <netinet/ip.h>
        !           120: #include <netinet/ip_var.h>
        !           121: #include <netinet/if_ether.h>
        !           122: 
        !           123: #include <netiso/iso.h>
        !           124: #include <netiso/iso_var.h>
        !           125: #include <netiso/iso_snpac.h>
        !           126: #include <netiso/argo_debug.h>
        !           127: #include <netiso/iso_errno.h>
        !           128: #include <netiso/eonvar.h>
        !           129: 
        !           130: extern struct timeval time;
        !           131: extern struct ifnet loif;
        !           132: 
        !           133: #define EOK 0
        !           134: 
        !           135: int                                            eoninput();
        !           136: int                                            eonoutput();
        !           137: int                                            eonioctl();
        !           138: int                                            eonattach();
        !           139: int                                            eoninit();
        !           140: void                                           eonrtrequest();
        !           141: struct ifnet                   eonif[1];
        !           142: 
        !           143: eonprotoinit() {
        !           144:        (void) eonattach();
        !           145: }
        !           146: 
        !           147: struct eon_llinfo eon_llinfo;
        !           148: #define PROBE_OK 0;
        !           149: 
        !           150: 
        !           151: /*
        !           152:  * FUNCTION:           eonattach
        !           153:  *
        !           154:  * PURPOSE:                    autoconf attach routine
        !           155:  *
        !           156:  * RETURNS:                    void
        !           157:  */
        !           158: 
        !           159: eonattach()
        !           160: {
        !           161:        register struct ifnet *ifp = eonif;
        !           162: 
        !           163:        IFDEBUG(D_EON)
        !           164:                printf("eonattach()\n");
        !           165:        ENDDEBUG
        !           166:        ifp->if_unit = 0;
        !           167:        ifp->if_name = "eon";
        !           168:        ifp->if_mtu = ETHERMTU; 
        !           169:                /* since everything will go out over ether or token ring */
        !           170: 
        !           171:        ifp->if_init = eoninit;
        !           172:        ifp->if_ioctl = eonioctl;
        !           173:        ifp->if_output = eonoutput;
        !           174:        ifp->if_type = IFT_EON;
        !           175:        ifp->if_addrlen = 5;
        !           176:        ifp->if_hdrlen = EONIPLEN;
        !           177:        ifp->if_flags = IFF_BROADCAST;
        !           178:        if_attach(ifp);
        !           179:        eonioctl(ifp, SIOCSIFADDR, (caddr_t)ifp->if_addrlist);
        !           180:        eon_llinfo.el_qhdr.link = 
        !           181:                eon_llinfo.el_qhdr.rlink = &(eon_llinfo.el_qhdr);
        !           182: 
        !           183:        IFDEBUG(D_EON)
        !           184:                printf("eonattach()\n");
        !           185:        ENDDEBUG
        !           186: }
        !           187: 
        !           188: 
        !           189: /*
        !           190:  * FUNCTION:           eonioctl
        !           191:  *
        !           192:  * PURPOSE:                    io controls - ifconfig
        !           193:  *                             need commands to 
        !           194:  *                                     link-UP (core addr) (flags: ES, IS)
        !           195:  *                                     link-DOWN (core addr) (flags: ES, IS)
        !           196:  *                             must be callable from kernel or user
        !           197:  *
        !           198:  * RETURNS:                    nothing
        !           199:  */
        !           200: eonioctl(ifp, cmd, data)
        !           201:        register struct ifnet *ifp;
        !           202:        int cmd;
        !           203:        register caddr_t data;
        !           204: {
        !           205:        int s = splimp();
        !           206:        register int error = 0;
        !           207: 
        !           208:        IFDEBUG(D_EON)
        !           209:                printf("eonioctl (cmd 0x%x) \n", cmd);
        !           210:        ENDDEBUG
        !           211: 
        !           212:        switch (cmd) {
        !           213:                register struct ifaddr *ifa;
        !           214: 
        !           215:        case SIOCSIFADDR:
        !           216:                if (ifa = (struct ifaddr *)data) {
        !           217:                        ifp->if_flags |= IFF_UP;
        !           218:                        if (ifa->ifa_addr->sa_family != AF_LINK)
        !           219:                                ifa->ifa_rtrequest = eonrtrequest;
        !           220:                }
        !           221:                break;
        !           222:        }
        !           223:        splx(s);
        !           224:        return(error);
        !           225: }
        !           226: 
        !           227: 
        !           228: eoniphdr(hdr, loc, ro, class, zero)
        !           229: struct route *ro;
        !           230: register struct eon_iphdr *hdr;
        !           231: caddr_t loc;
        !           232: {
        !           233:        struct mbuf mhead;
        !           234:        register struct sockaddr_in *sin = (struct sockaddr_in *)&ro->ro_dst;
        !           235:        if (zero) {
        !           236:                bzero((caddr_t)hdr, sizeof (*hdr));
        !           237:                bzero((caddr_t)ro, sizeof (*ro));
        !           238:        }
        !           239:        sin->sin_family = AF_INET;
        !           240:        sin->sin_len = sizeof (*sin);
        !           241:        bcopy(loc, (caddr_t)&sin->sin_addr, sizeof(struct in_addr));
        !           242:        /*
        !           243:         * If there is a cached route,
        !           244:         * check that it is to the same destination
        !           245:         * and is still up.  If not, free it and try again.
        !           246:         */
        !           247:        if (ro->ro_rt) {
        !           248:                struct sockaddr_in *dst =
        !           249:                        (struct sockaddr_in *)rt_key(ro->ro_rt);
        !           250:                if ((ro->ro_rt->rt_flags & RTF_UP) == 0 ||
        !           251:                   sin->sin_addr.s_addr != dst->sin_addr.s_addr) {
        !           252:                        RTFREE(ro->ro_rt);
        !           253:                        ro->ro_rt = (struct rtentry *)0;
        !           254:                }
        !           255:        }
        !           256:        rtalloc(ro);
        !           257:        if (ro->ro_rt)
        !           258:                ro->ro_rt->rt_use++;
        !           259:        hdr->ei_ip.ip_dst = sin->sin_addr;
        !           260:        hdr->ei_ip.ip_p = IPPROTO_EON;
        !           261:        hdr->ei_ip.ip_ttl = MAXTTL;     
        !           262:        hdr->ei_eh.eonh_class = class;
        !           263:        hdr->ei_eh.eonh_vers = EON_VERSION;
        !           264:        hdr->ei_eh.eonh_csum = 0;
        !           265:        mhead.m_data = (caddr_t) &hdr->ei_eh;
        !           266:        mhead.m_len = sizeof(struct eon_hdr);
        !           267:        mhead.m_next = 0;
        !           268:        IFDEBUG(D_EON)
        !           269:                printf("eonoutput : gen csum (0x%x, offset %d, datalen %d)\n", 
        !           270:                        &mhead,
        !           271:                        _offsetof(struct eon_hdr, eonh_csum), sizeof(struct eon_hdr)); 
        !           272:        ENDDEBUG
        !           273:        iso_gen_csum(&mhead, 
        !           274:                _offsetof(struct eon_hdr, eonh_csum), sizeof(struct eon_hdr)); 
        !           275: }
        !           276: /*
        !           277:  * FUNCTION:           eonrtrequest
        !           278:  *
        !           279:  * PURPOSE:                    maintains list of direct eon recipients.
        !           280:  *                                     sets up IP route for rest.
        !           281:  *
        !           282:  * RETURNS:                    nothing
        !           283:  */
        !           284: void
        !           285: eonrtrequest(cmd, rt, gate)
        !           286: register struct rtentry *rt;
        !           287: register struct sockaddr *gate;
        !           288: {
        !           289:        unsigned long zerodst = 0;
        !           290:        caddr_t ipaddrloc = (caddr_t) &zerodst;
        !           291:        register struct eon_llinfo *el = (struct eon_llinfo *)rt->rt_llinfo;
        !           292: 
        !           293:        /*
        !           294:         * Common Housekeeping
        !           295:         */
        !           296:        switch (cmd) {
        !           297:        case RTM_DELETE:
        !           298:                if (el) {
        !           299:                        remque(&(el->el_qhdr));
        !           300:                        if (el->el_iproute.ro_rt)
        !           301:                                RTFREE(el->el_iproute.ro_rt);
        !           302:                        Free(el);
        !           303:                        rt->rt_llinfo = 0;
        !           304:                }
        !           305:                return;
        !           306: 
        !           307:        case RTM_ADD:
        !           308:        case RTM_RESOLVE:
        !           309:                rt->rt_rmx.rmx_mtu = loif.if_mtu; /* unless better below */
        !           310:                R_Malloc(el, struct eon_llinfo *, sizeof(*el));
        !           311:                rt->rt_llinfo = (caddr_t)el;
        !           312:                if (el == 0)
        !           313:                        return;
        !           314:                Bzero(el, sizeof(*el));
        !           315:                insque(&(el->el_qhdr), &eon_llinfo.el_qhdr);
        !           316:                el->el_rt = rt;
        !           317:                break;
        !           318:        }
        !           319:        if (gate || (gate = rt->rt_gateway)) switch (gate->sa_family) {
        !           320:                case AF_LINK:
        !           321: #define SDL(x) ((struct sockaddr_dl *)x)
        !           322:                        if (SDL(gate)->sdl_alen == 1)
        !           323:                                el->el_snpaoffset = *(u_char *)LLADDR(SDL(gate));
        !           324:                        else
        !           325:                                ipaddrloc = LLADDR(SDL(gate));
        !           326:                        break;
        !           327:                case AF_INET:
        !           328: #define SIN(x) ((struct sockaddr_in *)x)
        !           329:                        ipaddrloc = (caddr_t) &SIN(gate)->sin_addr;
        !           330:                        break;
        !           331:                default:
        !           332:                        return;
        !           333:        }
        !           334:        el->el_flags |= RTF_UP;
        !           335:        eoniphdr(&el->el_ei, ipaddrloc, &el->el_iproute, EON_NORMAL_ADDR, 0);
        !           336:        if (el->el_iproute.ro_rt)
        !           337:                rt->rt_rmx.rmx_mtu = el->el_iproute.ro_rt->rt_rmx.rmx_mtu
        !           338:                                                        - sizeof(el->el_ei);
        !           339: }
        !           340: 
        !           341: /*
        !           342:  * FUNCTION:           eoninit
        !           343:  *
        !           344:  * PURPOSE:                    initialization
        !           345:  *
        !           346:  * RETURNS:                    nothing
        !           347:  */
        !           348: 
        !           349: eoninit(unit)
        !           350:        int unit;
        !           351: {
        !           352:        printf("eon driver-init eon%d\n", unit);
        !           353: }
        !           354: 
        !           355: 
        !           356: /*
        !           357:  * FUNCTION:           eonoutput
        !           358:  *
        !           359:  * PURPOSE:                    prepend an eon header and hand to IP
        !           360:  * ARGUMENTS:          (ifp) is points to the ifnet structure for this unit/device
        !           361:  *                                     (m)  is an mbuf *, *m is a CLNL packet
        !           362:  *                                     (dst) is a destination address - have to interp. as
        !           363:  *                                     multicast or broadcast or real address.
        !           364:  *
        !           365:  * RETURNS:                    unix error code
        !           366:  *
        !           367:  * NOTES:                      
        !           368:  *
        !           369:  */
        !           370: eonoutput(ifp, m, dst, rt)
        !           371:        struct ifnet    *ifp;
        !           372:        register struct mbuf    *m;             /* packet */
        !           373:        struct sockaddr_iso             *dst;           /* destination addr */
        !           374:        struct rtentry *rt;
        !           375: {
        !           376:        register struct eon_llinfo *el;
        !           377:        register struct eon_iphdr *ei;
        !           378:        struct route *ro;
        !           379:        int     datalen;
        !           380:        struct mbuf *mh;
        !           381:        int     error = 0, class = 0, alen = 0;
        !           382:        caddr_t ipaddrloc;
        !           383:        static struct eon_iphdr eon_iphdr;
        !           384:        static struct route route;
        !           385: 
        !           386:        IFDEBUG(D_EON)
        !           387:                printf("eonoutput \n" );
        !           388:        ENDDEBUG
        !           389: 
        !           390:        ifp->if_lastchange = time;
        !           391:        ifp->if_opackets++;
        !           392:        if (rt == 0 || (el = (struct eon_llinfo *)rt->rt_llinfo) == 0) {
        !           393:                if (dst->siso_family == AF_LINK) {
        !           394:                        register struct sockaddr_dl *sdl = (struct sockaddr_dl *)dst;
        !           395: 
        !           396:                        ipaddrloc = LLADDR(sdl);
        !           397:                        alen = sdl->sdl_alen;
        !           398:                } else if (dst->siso_family == AF_ISO && dst->siso_data[0] == AFI_SNA) {
        !           399:                        alen = dst->siso_nlen - 1;
        !           400:                        ipaddrloc = (caddr_t) dst->siso_data + 1;
        !           401:                }
        !           402:                switch (alen) {
        !           403:                case 5:
        !           404:                        class =  4[(u_char *)ipaddrloc];
        !           405:                case 4:
        !           406:                        ro = &route;
        !           407:                        ei = &eon_iphdr;
        !           408:                        eoniphdr(ei, ipaddrloc, ro, class, 1);
        !           409:                        goto send;
        !           410:                }
        !           411: einval:
        !           412:                error =  EINVAL;
        !           413:                goto flush;
        !           414:        }
        !           415:        if ((el->el_flags & RTF_UP) == 0) {
        !           416:                eonrtrequest(RTM_CHANGE, rt, (struct sockaddr *)0);
        !           417:                if ((el->el_flags & RTF_UP) == 0) {
        !           418:                        error = EHOSTUNREACH;
        !           419:                        goto flush;
        !           420:                }
        !           421:        }
        !           422:        if ((m->m_flags & M_PKTHDR) == 0) {
        !           423:                printf("eon: got non headered packet\n");
        !           424:                goto einval;
        !           425:        }
        !           426:        ei = &el->el_ei;
        !           427:        ro = &el->el_iproute;
        !           428:        if (el->el_snpaoffset) {
        !           429:                if (dst->siso_family == AF_ISO) {
        !           430:                        bcopy((caddr_t) &dst->siso_data[el->el_snpaoffset],
        !           431:                                        (caddr_t) &ei->ei_ip.ip_dst, sizeof(ei->ei_ip.ip_dst));
        !           432:                } else
        !           433:                        goto einval;
        !           434:        }
        !           435: send:
        !           436:        /* put an eon_hdr in the buffer, prepended by an ip header */
        !           437:        datalen = m->m_pkthdr.len + EONIPLEN;
        !           438:        MGETHDR(mh, M_DONTWAIT, MT_HEADER);
        !           439:        if(mh == (struct mbuf *)0)
        !           440:                goto flush;
        !           441:        mh->m_next = m;
        !           442:        m = mh;
        !           443:        MH_ALIGN(m, sizeof(struct eon_iphdr));
        !           444:        m->m_len = sizeof(struct eon_iphdr);
        !           445:        ifp->if_obytes +=
        !           446:                (ei->ei_ip.ip_len = (u_short)(m->m_pkthdr.len = datalen));
        !           447:        *mtod(m, struct eon_iphdr *) = *ei;
        !           448: 
        !           449:        IFDEBUG(D_EON)
        !           450:                printf("eonoutput dst ip addr : %x\n",  ei->ei_ip.ip_dst.s_addr);
        !           451:                printf("eonoutput ip_output : eonip header:\n");
        !           452:                dump_buf(ei, sizeof(struct eon_iphdr));
        !           453:        ENDDEBUG
        !           454: 
        !           455:        error = ip_output(m, (struct mbuf *)0, ro, 0, NULL);
        !           456:        m = 0;
        !           457:        if (error) {
        !           458:                ifp->if_oerrors++;
        !           459:                ifp->if_opackets--;
        !           460:                ifp->if_obytes -= datalen;
        !           461:        }
        !           462: flush:
        !           463:        if (m)
        !           464:                m_freem(m);
        !           465:        return error;
        !           466: }
        !           467: 
        !           468: eoninput(m, iphlen)
        !           469:        register struct mbuf    *m;
        !           470:        int iphlen;
        !           471: {
        !           472:        register struct eon_hdr *eonhdr;
        !           473:        register struct ip              *iphdr;
        !           474:        struct ifnet                    *eonifp;
        !           475:        int                                             s;
        !           476: 
        !           477:        eonifp = &eonif[0]; /* kludge - really want to give CLNP
        !           478:                                                * the ifp for eon, not for the real device
        !           479:                                                */
        !           480: 
        !           481:        IFDEBUG(D_EON)
        !           482:                printf("eoninput() 0x%x m_data 0x%x m_len 0x%x dequeued\n",
        !           483:                        m, m?m->m_data:0, m?m->m_len:0);
        !           484:        ENDDEBUG
        !           485: 
        !           486:        if (m == 0)
        !           487:                return;
        !           488:        if (iphlen > sizeof (struct ip))
        !           489:                ip_stripoptions(m, (struct mbuf *)0);
        !           490:        if (m->m_len < EONIPLEN) {
        !           491:                if ((m = m_pullup(m, EONIPLEN)) == 0) {
        !           492:                        IncStat(es_badhdr);
        !           493: drop:
        !           494:                        IFDEBUG(D_EON)
        !           495:                                printf("eoninput: DROP \n" );
        !           496:                        ENDDEBUG
        !           497:                        eonifp->if_ierrors ++;
        !           498:                        m_freem(m);
        !           499:                        return;
        !           500:                }
        !           501:        }
        !           502:        eonif->if_ibytes += m->m_pkthdr.len;
        !           503:        eonif->if_lastchange = time;
        !           504:        iphdr = mtod(m, struct ip *);
        !           505:        /* do a few checks for debugging */
        !           506:        if( iphdr->ip_p != IPPROTO_EON ) {
        !           507:                IncStat(es_badhdr);
        !           508:                goto drop;
        !           509:        }
        !           510:        /* temporarily drop ip header from the mbuf */
        !           511:        m->m_data += sizeof(struct ip);
        !           512:        eonhdr = mtod(m, struct eon_hdr *);
        !           513:        if( iso_check_csum( m, sizeof(struct eon_hdr) )   != EOK ) {
        !           514:                IncStat(es_badcsum);
        !           515:                goto drop;
        !           516:        }
        !           517:        m->m_data -= sizeof(struct ip);
        !           518:                
        !           519:        IFDEBUG(D_EON)
        !           520:                printf("eoninput csum ok class 0x%x\n", eonhdr->eonh_class );
        !           521:                printf("eoninput: eon header:\n");
        !           522:                dump_buf(eonhdr, sizeof(struct eon_hdr));
        !           523:        ENDDEBUG
        !           524: 
        !           525:        /* checks for debugging */
        !           526:        if( eonhdr->eonh_vers != EON_VERSION) {
        !           527:                IncStat(es_badhdr);
        !           528:                goto drop;
        !           529:        }
        !           530:        m->m_flags &= ~(M_BCAST|M_MCAST);
        !           531:        switch( eonhdr->eonh_class) {
        !           532:                case EON_BROADCAST:
        !           533:                        IncStat(es_in_broad);
        !           534:                        m->m_flags |= M_BCAST;
        !           535:                        break;
        !           536:                case EON_NORMAL_ADDR:
        !           537:                        IncStat(es_in_normal);
        !           538:                        break;
        !           539:                case EON_MULTICAST_ES:
        !           540:                        IncStat(es_in_multi_es);
        !           541:                        m->m_flags |= M_MCAST;
        !           542:                        break;
        !           543:                case EON_MULTICAST_IS:
        !           544:                        IncStat(es_in_multi_is);
        !           545:                        m->m_flags |= M_MCAST;
        !           546:                        break;
        !           547:        }
        !           548:        eonifp->if_ipackets++;
        !           549: 
        !           550:        {
        !           551:                /* put it on the CLNP queue and set soft interrupt */
        !           552:                struct ifqueue                  *ifq;
        !           553:                extern struct ifqueue   clnlintrq;
        !           554: 
        !           555:                m->m_pkthdr.rcvif = eonifp; /* KLUDGE */
        !           556:                IFDEBUG(D_EON)
        !           557:                        printf("eoninput to clnl IFQ\n");
        !           558:                ENDDEBUG
        !           559:                ifq = &clnlintrq;
        !           560:                s = splimp();
        !           561:                if (IF_QFULL(ifq)) {
        !           562:                        IF_DROP(ifq);
        !           563:                        m_freem(m);
        !           564:                        eonifp->if_iqdrops++;
        !           565:                        eonifp->if_ipackets--;
        !           566:                        splx(s);
        !           567:                        return;
        !           568:                }
        !           569:                IF_ENQUEUE(ifq, m);
        !           570:                IFDEBUG(D_EON) 
        !           571:                        printf(
        !           572:        "0x%x enqueued on clnp Q: m_len 0x%x m_type 0x%x m_data 0x%x\n", 
        !           573:                                m, m->m_len, m->m_type, m->m_data);
        !           574:                        dump_buf(mtod(m, caddr_t), m->m_len);
        !           575:                ENDDEBUG
        !           576:                schednetisr(NETISR_ISO);
        !           577:                splx(s);
        !           578:        }
        !           579: }
        !           580: 
        !           581: int
        !           582: eonctlinput(cmd, sin)
        !           583:        int cmd;
        !           584:        struct sockaddr_in *sin;
        !           585: {
        !           586:        extern u_char inetctlerrmap[];
        !           587: 
        !           588:        IFDEBUG(D_EON)
        !           589:                printf("eonctlinput: cmd 0x%x addr: ", cmd);
        !           590:                dump_isoaddr(sin);
        !           591:                printf("\n");
        !           592:        ENDDEBUG
        !           593: 
        !           594:        if (cmd < 0 || cmd > PRC_NCMDS)
        !           595:                return 0;
        !           596: 
        !           597:        IncStat(es_icmp[cmd]);
        !           598:        switch (cmd) {
        !           599: 
        !           600:                case    PRC_QUENCH:
        !           601:                case    PRC_QUENCH2:
        !           602:                        /* TODO: set the dec bit */
        !           603:                        break;
        !           604:                case    PRC_TIMXCEED_REASS:
        !           605:                case    PRC_ROUTEDEAD:
        !           606:                case    PRC_HOSTUNREACH:
        !           607:                case    PRC_UNREACH_NET:
        !           608:                case    PRC_IFDOWN:
        !           609:                case    PRC_UNREACH_HOST:
        !           610:                case    PRC_HOSTDEAD:
        !           611:                case    PRC_TIMXCEED_INTRANS:
        !           612:                        /* TODO: mark the link down */
        !           613:                        break;
        !           614: 
        !           615:                case    PRC_UNREACH_PROTOCOL:
        !           616:                case    PRC_UNREACH_PORT:
        !           617:                case    PRC_UNREACH_SRCFAIL:
        !           618:                case    PRC_REDIRECT_NET:
        !           619:                case    PRC_REDIRECT_HOST:
        !           620:                case    PRC_REDIRECT_TOSNET:
        !           621:                case    PRC_REDIRECT_TOSHOST:
        !           622:                case    PRC_MSGSIZE:
        !           623:                case    PRC_PARAMPROB:
        !           624:                        /* printf("eonctlinput: ICMP cmd 0x%x\n", cmd );*/
        !           625:                break;
        !           626:        }
        !           627:        return 0;
        !           628: }
        !           629: 
        !           630: #endif

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