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Annotation of XNU/bsd/netiso/clnp_raw.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*-
        !            23:  * Copyright (c) 1991, 1993
        !            24:  *     The Regents of the University of California.  All rights reserved.
        !            25:  *
        !            26:  * Redistribution and use in source and binary forms, with or without
        !            27:  * modification, are permitted provided that the following conditions
        !            28:  * are met:
        !            29:  * 1. Redistributions of source code must retain the above copyright
        !            30:  *    notice, this list of conditions and the following disclaimer.
        !            31:  * 2. Redistributions in binary form must reproduce the above copyright
        !            32:  *    notice, this list of conditions and the following disclaimer in the
        !            33:  *    documentation and/or other materials provided with the distribution.
        !            34:  * 3. All advertising materials mentioning features or use of this software
        !            35:  *    must display the following acknowledgement:
        !            36:  *     This product includes software developed by the University of
        !            37:  *     California, Berkeley and its contributors.
        !            38:  * 4. Neither the name of the University nor the names of its contributors
        !            39:  *    may be used to endorse or promote products derived from this software
        !            40:  *    without specific prior written permission.
        !            41:  *
        !            42:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            43:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            44:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            45:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            46:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            47:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            48:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            49:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            50:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            51:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            52:  * SUCH DAMAGE.
        !            53:  *
        !            54:  *     @(#)clnp_raw.c  8.1 (Berkeley) 6/10/93
        !            55:  */
        !            56: 
        !            57: /***********************************************************
        !            58:                                Copyright IBM Corporation 1987
        !            59: 
        !            60:                       All Rights Reserved
        !            61: 
        !            62: Permission to use, copy, modify, and distribute this software and its 
        !            63: documentation for any purpose and without fee is hereby granted, 
        !            64: provided that the above copyright notice appear in all copies and that
        !            65: both that copyright notice and this permission notice appear in 
        !            66: supporting documentation, and that the name of IBM not be
        !            67: used in advertising or publicity pertaining to distribution of the
        !            68: software without specific, written prior permission.  
        !            69: 
        !            70: IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
        !            71: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
        !            72: IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
        !            73: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
        !            74: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
        !            75: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
        !            76: SOFTWARE.
        !            77: 
        !            78: ******************************************************************/
        !            79: 
        !            80: /*
        !            81:  * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
        !            82:  */
        !            83: 
        !            84: #include <sys/param.h>
        !            85: #include <sys/mbuf.h>
        !            86: #include <sys/domain.h>
        !            87: #include <sys/protosw.h>
        !            88: #include <sys/socket.h>
        !            89: #include <sys/socketvar.h>
        !            90: #include <sys/errno.h>
        !            91: #include <sys/time.h>
        !            92: #include <sys/malloc.h>
        !            93: 
        !            94: #include <net/if.h>
        !            95: #include <net/route.h>
        !            96: #include <net/raw_cb.h>
        !            97: 
        !            98: #include <netiso/iso.h>
        !            99: #include <netiso/iso_pcb.h>
        !           100: #include <netiso/clnp.h>
        !           101: #include <netiso/clnp_stat.h>
        !           102: #include <netiso/argo_debug.h>
        !           103: 
        !           104: #include <netiso/tp_user.h>            /* XXX -- defines SOL_NETWORK */
        !           105: 
        !           106: struct sockproto       rclnp_proto     = { PF_ISO, 0 };
        !           107: /*
        !           108:  * FUNCTION:           rclnp_input
        !           109:  *
        !           110:  * PURPOSE:                    Setup generic address an protocol structures for
        !           111:  *                                     raw input routine, then pass them along with the
        !           112:  *                                     mbuf chain.
        !           113:  *
        !           114:  * RETURNS:                    none
        !           115:  *
        !           116:  * SIDE EFFECTS:       
        !           117:  *
        !           118:  * NOTES:                      The protocol field of rclnp_proto is set to zero indicating
        !           119:  *                                     no protocol.
        !           120:  */
        !           121: rclnp_input(m, src, dst, hdrlen)
        !           122: struct mbuf            *m;             /* ptr to packet */
        !           123: struct sockaddr_iso    *src;   /* ptr to src address */
        !           124: struct sockaddr_iso    *dst;   /* ptr to dest address */
        !           125: int                                    hdrlen; /* length (in bytes) of clnp header */
        !           126: {
        !           127: #ifdef TROLL
        !           128:        if (trollctl.tr_ops & TR_CHUCK) {
        !           129:                m_freem(m);
        !           130:                return;
        !           131:        }
        !           132: #endif /* TROLL */
        !           133: 
        !           134:        raw_input(m, &rclnp_proto, (struct sockaddr *)src, (struct sockaddr *)dst);
        !           135: }
        !           136: 
        !           137: /*
        !           138:  * FUNCTION:           rclnp_output
        !           139:  *
        !           140:  * PURPOSE:                    Prepare to send a raw clnp packet. Setup src and dest
        !           141:  *                                     addresses, count the number of bytes to send, and
        !           142:  *                                     call clnp_output.
        !           143:  *
        !           144:  * RETURNS:                    success - 0
        !           145:  *                                     failure - an appropriate error code
        !           146:  *
        !           147:  * SIDE EFFECTS:       
        !           148:  *
        !           149:  * NOTES:                      
        !           150:  */
        !           151: rclnp_output(m0, so)
        !           152: struct mbuf            *m0;            /* packet to send */
        !           153: struct socket  *so;    /* socket to send from */
        !           154: {
        !           155:        register struct mbuf    *m;                     /* used to scan a chain */
        !           156:        int                                             len = 0;        /* store length of chain here */
        !           157:        struct rawisopcb                *rp = sotorawisopcb(so); /* ptr to raw cb */
        !           158:        int                                             error;          /* return value of function */
        !           159:        int                                             flags;          /* flags for clnp_output */
        !           160: 
        !           161:        if (0 == (m0->m_flags & M_PKTHDR))
        !           162:                return (EINVAL);
        !           163:        /*
        !           164:         *      Set up src address. If user has bound socket to an address, use it.
        !           165:         *      Otherwise, do not specify src (clnp_output will fill it in).
        !           166:         */
        !           167:        if (rp->risop_rcb.rcb_laddr) {
        !           168:                if (rp->risop_isop.isop_sladdr.siso_family != AF_ISO) {
        !           169: bad:
        !           170:                        m_freem(m0);
        !           171:                        return(EAFNOSUPPORT);
        !           172:                }
        !           173:        }
        !           174:        /* set up dest address */
        !           175:        if (rp->risop_rcb.rcb_faddr == 0)
        !           176:                goto bad;
        !           177:        rp->risop_isop.isop_sfaddr =
        !           178:                                *(struct sockaddr_iso *)rp->risop_rcb.rcb_faddr;
        !           179:        rp->risop_isop.isop_faddr = &rp->risop_isop.isop_sfaddr;
        !           180: 
        !           181:        /* get flags and ship it off */
        !           182:        flags = rp->risop_flags & CLNP_VFLAGS;
        !           183: 
        !           184:        error = clnp_output(m0, &rp->risop_isop, m0->m_pkthdr.len,
        !           185:                                                                                                flags|CLNP_NOCACHE);
        !           186: 
        !           187:        return (error);
        !           188: }
        !           189: 
        !           190: /*
        !           191:  * FUNCTION:           rclnp_ctloutput
        !           192:  *
        !           193:  * PURPOSE:                    Raw clnp socket option processing
        !           194:  *                                     All options are stored inside an mbuf. 
        !           195:  *
        !           196:  * RETURNS:                    success - 0
        !           197:  *                                     failure - unix error code
        !           198:  *
        !           199:  * SIDE EFFECTS:       If the options mbuf does not exist, it the mbuf passed
        !           200:  *                                     is used.
        !           201:  *
        !           202:  * NOTES:                      
        !           203:  */
        !           204: rclnp_ctloutput(op, so, level, optname, m)
        !           205: int                            op;                             /* type of operation */
        !           206: struct socket  *so;                    /* ptr to socket */
        !           207: int                    level;                  /* level of option */
        !           208: int                            optname;                /* name of option */
        !           209: struct mbuf            **m;                    /* ptr to ptr to option data */
        !           210: {
        !           211:        int                                             error = 0;
        !           212:        register struct rawisopcb       *rp = sotorawisopcb(so);/* raw cb ptr */
        !           213: 
        !           214:        IFDEBUG(D_CTLOUTPUT)
        !           215:                printf("rclnp_ctloutput: op = x%x, level = x%x, name = x%x\n",
        !           216:                        op, level, optname);
        !           217:                if (*m != NULL) {
        !           218:                        printf("rclnp_ctloutput: %d bytes of mbuf data\n", (*m)->m_len);
        !           219:                        dump_buf(mtod((*m), caddr_t), (*m)->m_len);
        !           220:                }
        !           221:        ENDDEBUG
        !           222: 
        !           223: #ifdef SOL_NETWORK
        !           224:        if (level != SOL_NETWORK)
        !           225:                error = EINVAL;
        !           226:        else switch (op) {
        !           227: #else
        !           228:        switch (op) {
        !           229: #endif /* SOL_NETWORK */
        !           230:                case PRCO_SETOPT:
        !           231:                        switch (optname) {
        !           232:                                case CLNPOPT_FLAGS: {
        !           233:                                        u_short usr_flags;
        !           234:                                        /* 
        !           235:                                         *      Insure that the data passed has exactly one short in it 
        !           236:                                         */
        !           237:                                        if ((*m == NULL) || ((*m)->m_len != sizeof(short))) {
        !           238:                                                error = EINVAL;
        !           239:                                                break;
        !           240:                                        }
        !           241:                                         
        !           242:                                        /*
        !           243:                                         *      Don't allow invalid flags to be set
        !           244:                                         */
        !           245:                                        usr_flags = (*mtod((*m), short *));
        !           246: 
        !           247:                                        if ((usr_flags & (CLNP_VFLAGS)) != usr_flags) {
        !           248:                                                error = EINVAL;
        !           249:                                        } else
        !           250:                                                rp->risop_flags |= usr_flags;
        !           251: 
        !           252:                                        } break;
        !           253:                        
        !           254:                                case CLNPOPT_OPTS:
        !           255:                                        if (error = clnp_set_opts(&rp->risop_isop.isop_options, m))
        !           256:                                                break;
        !           257:                                        rp->risop_isop.isop_optindex = m_get(M_WAIT, MT_SOOPTS);
        !           258:                                        (void) clnp_opt_sanity(rp->risop_isop.isop_options, 
        !           259:                                                mtod(rp->risop_isop.isop_options, caddr_t),
        !           260:                                                rp->risop_isop.isop_options->m_len, 
        !           261:                                                mtod(rp->risop_isop.isop_optindex,
        !           262:                                                        struct clnp_optidx *));
        !           263:                                        break;
        !           264:                        } 
        !           265:                        break;
        !           266: 
        !           267:                case PRCO_GETOPT:
        !           268: #ifdef notdef
        !           269:                        /* commented out to keep hi C quiet */
        !           270:                        switch (optname) {
        !           271:                                default:
        !           272:                                        error = EINVAL;
        !           273:                                        break;
        !           274:                        }
        !           275: #endif /* notdef */
        !           276:                        break;
        !           277:                default:
        !           278:                        error = EINVAL;
        !           279:                        break;
        !           280:        }
        !           281:        if (op == PRCO_SETOPT) {
        !           282:                /* note: m_freem does not barf is *m is NULL */
        !           283:                m_freem(*m);
        !           284:                *m = NULL;
        !           285:        }
        !           286:        
        !           287:        return error;
        !           288: }
        !           289: 
        !           290: /*ARGSUSED*/
        !           291: clnp_usrreq(so, req, m, nam, control)
        !           292:        register struct socket *so;
        !           293:        int req;
        !           294:        struct mbuf *m, *nam, *control;
        !           295: {
        !           296:        register int error = 0;
        !           297:        register struct rawisopcb *rp = sotorawisopcb(so);
        !           298: 
        !           299:        rp = sotorawisopcb(so);
        !           300:        switch (req) {
        !           301: 
        !           302:        case PRU_ATTACH:
        !           303:                if (rp)
        !           304:                        panic("rip_attach");
        !           305:                MALLOC(rp, struct rawisopcb *, sizeof *rp, M_PCB, M_WAITOK);
        !           306:                if (rp == 0)
        !           307:                        return (ENOBUFS);
        !           308:                bzero((caddr_t)rp, sizeof *rp);
        !           309:                so->so_pcb = (caddr_t)rp;
        !           310:                break;
        !           311: 
        !           312:        case PRU_DETACH:
        !           313:                if (rp == 0)
        !           314:                        panic("rip_detach");
        !           315:                if (rp->risop_isop.isop_options)
        !           316:                        m_freem(rp->risop_isop.isop_options);
        !           317:                if (rp->risop_isop.isop_route.ro_rt)
        !           318:                        RTFREE(rp->risop_isop.isop_route.ro_rt);
        !           319:                if (rp->risop_rcb.rcb_laddr)
        !           320:                        rp->risop_rcb.rcb_laddr = 0;
        !           321:                /* free clnp cached hdr if necessary */
        !           322:                if (rp->risop_isop.isop_clnpcache != NULL) {
        !           323:                        struct clnp_cache *clcp = 
        !           324:                                mtod(rp->risop_isop.isop_clnpcache, struct clnp_cache *);
        !           325:                        if (clcp->clc_hdr != NULL) {
        !           326:                                m_free(clcp->clc_hdr);
        !           327:                        }
        !           328:                        m_free(rp->risop_isop.isop_clnpcache);
        !           329:                }
        !           330:                if (rp->risop_isop.isop_optindex != NULL)
        !           331:                        m_free(rp->risop_isop.isop_optindex);
        !           332: 
        !           333:                break;
        !           334: 
        !           335:        case PRU_BIND:
        !           336:            {
        !           337:                struct sockaddr_iso *addr = mtod(nam, struct sockaddr_iso *);
        !           338: 
        !           339:                if (nam->m_len != sizeof(*addr))
        !           340:                        return (EINVAL);
        !           341:                if ((ifnet == 0) ||
        !           342:                    (addr->siso_family != AF_ISO) ||
        !           343:                    (addr->siso_addr.isoa_len  &&
        !           344:                     ifa_ifwithaddr((struct sockaddr *)addr) == 0))
        !           345:                        return (EADDRNOTAVAIL);
        !           346:                rp->risop_isop.isop_sladdr = *addr;
        !           347:                rp->risop_rcb.rcb_laddr = (struct sockaddr *)
        !           348:                        (rp->risop_isop.isop_laddr = &rp->risop_isop.isop_sladdr);
        !           349:                return (0);
        !           350:            }
        !           351:        case PRU_CONNECT:
        !           352:            {
        !           353:                struct sockaddr_iso *addr = mtod(nam, struct sockaddr_iso *);
        !           354: 
        !           355:                if ((nam->m_len > sizeof(*addr)) || (addr->siso_len > sizeof(*addr)))
        !           356:                        return (EINVAL);
        !           357:                if (ifnet == 0)
        !           358:                        return (EADDRNOTAVAIL);
        !           359:                if (addr->siso_family != AF_ISO)
        !           360:                rp->risop_isop.isop_sfaddr = *addr;
        !           361:                rp->risop_rcb.rcb_faddr = (struct sockaddr *)
        !           362:                        (rp->risop_isop.isop_faddr = &rp->risop_isop.isop_sfaddr);
        !           363:                soisconnected(so);
        !           364:                return (0);
        !           365:            }
        !           366:        }
        !           367:        error =  raw_usrreq(so, req, m, nam, control);
        !           368: 
        !           369:        if (error && req == PRU_ATTACH && so->so_pcb)
        !           370:                FREE((caddr_t)rp, M_PCB);
        !           371:        return (error);
        !           372: }

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