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Annotation of kernel/bsd/netiso/idrp_usrreq.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) 1992, 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:  *     @(#)idrp_usrreq.c       8.1 (Berkeley) 6/10/93
        !            58:  */
        !            59: 
        !            60: #include <sys/param.h>
        !            61: #include <sys/proc.h>
        !            62: #include <sys/systm.h>
        !            63: #include <sys/malloc.h>
        !            64: #include <sys/mbuf.h>
        !            65: #include <sys/socket.h>
        !            66: #include <sys/socketvar.h>
        !            67: #include <sys/protosw.h>
        !            68: #include <sys/errno.h>
        !            69: 
        !            70: #include <net/route.h>
        !            71: #include <net/if.h>
        !            72: 
        !            73: #include <netiso/argo_debug.h>
        !            74: #include <netiso/iso.h>
        !            75: #include <netiso/clnp.h>
        !            76: #include <netiso/clnl.h>
        !            77: #include <netiso/iso_pcb.h>
        !            78: #include <netiso/iso_var.h>
        !            79: 
        !            80: int idrp_input();
        !            81: struct isopcb  idrp_isop;
        !            82: static struct  sockaddr_iso idrp_addrs[2] =
        !            83: {  { sizeof(idrp_addrs), AF_ISO, }, { sizeof(idrp_addrs[1]), AF_ISO, } };
        !            84: /*
        !            85:  * IDRP initialization
        !            86:  */
        !            87: idrp_init()
        !            88: {
        !            89:        extern struct clnl_protosw clnl_protox[256];
        !            90: 
        !            91:        idrp_isop.isop_next = idrp_isop.isop_prev = &idrp_isop;
        !            92:        idrp_isop.isop_faddr = &idrp_isop.isop_sfaddr;
        !            93:        idrp_isop.isop_laddr = &idrp_isop.isop_sladdr;
        !            94:        idrp_isop.isop_sladdr = idrp_addrs[1];
        !            95:        idrp_isop.isop_sfaddr = idrp_addrs[1];
        !            96:        clnl_protox[ISO10747_IDRP].clnl_input = idrp_input;
        !            97: }
        !            98: 
        !            99: /*
        !           100:  * CALLED FROM:
        !           101:  *     tpclnp_input().
        !           102:  * FUNCTION and ARGUMENTS:
        !           103:  * Take a packet (m) from clnp, strip off the clnp header
        !           104:  * and mke suitable for the idrp socket.
        !           105:  * No return value.  
        !           106:  */
        !           107: idrp_input(m, src, dst)
        !           108:        register struct mbuf *m;
        !           109:        struct sockaddr_iso *src, *dst;
        !           110: {
        !           111:        if (idrp_isop.isop_socket == 0) {
        !           112:        bad:    m_freem(m);
        !           113:                return 0;
        !           114:        }
        !           115:        bzero(idrp_addrs[0].siso_data, sizeof(idrp_addrs[0].siso_data));
        !           116:        bcopy((caddr_t)&(src->siso_addr), (caddr_t)&idrp_addrs[0].siso_addr,
        !           117:                1 + src->siso_nlen);
        !           118:        bzero(idrp_addrs[1].siso_data, sizeof(idrp_addrs[1].siso_data));
        !           119:        bcopy((caddr_t)&(dst->siso_addr), (caddr_t)&idrp_addrs[1].siso_addr,
        !           120:                1 + dst->siso_nlen);
        !           121:        if (sbappendaddr(&idrp_isop.isop_socket->so_rcv,
        !           122:                (struct sockaddr *)idrp_addrs, m, (struct mbuf *)0) == 0)
        !           123:                goto bad;
        !           124:        sorwakeup(idrp_isop.isop_socket);
        !           125:        return 0;
        !           126: }
        !           127: 
        !           128: idrp_output(m, addr)
        !           129:        struct mbuf *m, *addr;
        !           130: {
        !           131:        register struct sockaddr_iso *siso = mtod(addr, struct sockaddr_iso *);
        !           132:        int s = splnet(), i;
        !           133: 
        !           134:        bcopy((caddr_t)&(siso->siso_addr),
        !           135:              (caddr_t)&idrp_isop.isop_sfaddr.siso_addr, 1 + siso->siso_nlen);
        !           136:        siso++;
        !           137:        bcopy((caddr_t)&(siso->siso_addr),
        !           138:              (caddr_t)&idrp_isop.isop_sladdr.siso_addr, 1 + siso->siso_nlen);
        !           139:        i = clnp_output(m, idrp_isop, m->m_pkthdr.len, 0);
        !           140:        splx(s);
        !           141:        return (i);
        !           142: }
        !           143: 
        !           144: u_long idrp_sendspace = 3072;          /* really max datagram size */
        !           145: u_long idrp_recvspace = 40 * 1024;     /* 40 1K datagrams */
        !           146: 
        !           147: /*ARGSUSED*/
        !           148: idrp_usrreq(so, req, m, addr, control)
        !           149:        struct socket *so;
        !           150:        int req;
        !           151:        struct mbuf *m, *addr, *control;
        !           152: {
        !           153:        int error = 0;
        !           154: 
        !           155:         /* Note: need to block idrp_input while changing
        !           156:         * the udp pcb queue and/or pcb addresses.
        !           157:         */
        !           158:        switch (req) {
        !           159: 
        !           160:        case PRU_ATTACH:
        !           161:                if (idrp_isop.isop_socket != NULL) {
        !           162:                        error = ENXIO;
        !           163:                        break;
        !           164:                }
        !           165:                idrp_isop.isop_socket = so;
        !           166:                error = soreserve(so, idrp_sendspace, idrp_recvspace);
        !           167:                break;
        !           168: 
        !           169:        case PRU_SHUTDOWN:
        !           170:                socantsendmore(so);
        !           171:                break;
        !           172: 
        !           173:        case PRU_SEND:
        !           174:                return (idrp_output(m, addr));
        !           175: 
        !           176:        case PRU_ABORT:
        !           177:                soisdisconnected(so);
        !           178:        case PRU_DETACH:
        !           179:                idrp_isop.isop_socket = 0;
        !           180:                break;
        !           181: 
        !           182: 
        !           183:        case PRU_SENSE:
        !           184:                /*
        !           185:                 * stat: don't bother with a blocksize.
        !           186:                 */
        !           187:                return (0);
        !           188: 
        !           189:        default:
        !           190:                return (EOPNOTSUPP);    /* do not free mbuf's */
        !           191:        }
        !           192: 
        !           193: release:
        !           194:        if (control) {
        !           195:                printf("idrp control data unexpectedly retained\n");
        !           196:                m_freem(control);
        !           197:        }
        !           198:        if (m)
        !           199:                m_freem(m);
        !           200:        return (error);
        !           201: }

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