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Annotation of XNU/bsd/netiso/idrp_usrreq.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) 1992, 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:  *     @(#)idrp_usrreq.c       8.1 (Berkeley) 6/10/93
        !            55:  */
        !            56: 
        !            57: #include <sys/param.h>
        !            58: #include <sys/proc.h>
        !            59: #include <sys/systm.h>
        !            60: #include <sys/malloc.h>
        !            61: #include <sys/mbuf.h>
        !            62: #include <sys/socket.h>
        !            63: #include <sys/socketvar.h>
        !            64: #include <sys/protosw.h>
        !            65: #include <sys/errno.h>
        !            66: 
        !            67: #include <net/route.h>
        !            68: #include <net/if.h>
        !            69: 
        !            70: #include <netiso/argo_debug.h>
        !            71: #include <netiso/iso.h>
        !            72: #include <netiso/clnp.h>
        !            73: #include <netiso/clnl.h>
        !            74: #include <netiso/iso_pcb.h>
        !            75: #include <netiso/iso_var.h>
        !            76: 
        !            77: int idrp_input();
        !            78: struct isopcb  idrp_isop;
        !            79: static struct  sockaddr_iso idrp_addrs[2] =
        !            80: {  { sizeof(idrp_addrs), AF_ISO, }, { sizeof(idrp_addrs[1]), AF_ISO, } };
        !            81: /*
        !            82:  * IDRP initialization
        !            83:  */
        !            84: idrp_init()
        !            85: {
        !            86:        extern struct clnl_protosw clnl_protox[256];
        !            87: 
        !            88:        idrp_isop.isop_next = idrp_isop.isop_prev = &idrp_isop;
        !            89:        idrp_isop.isop_faddr = &idrp_isop.isop_sfaddr;
        !            90:        idrp_isop.isop_laddr = &idrp_isop.isop_sladdr;
        !            91:        idrp_isop.isop_sladdr = idrp_addrs[1];
        !            92:        idrp_isop.isop_sfaddr = idrp_addrs[1];
        !            93:        clnl_protox[ISO10747_IDRP].clnl_input = idrp_input;
        !            94: }
        !            95: 
        !            96: /*
        !            97:  * CALLED FROM:
        !            98:  *     tpclnp_input().
        !            99:  * FUNCTION and ARGUMENTS:
        !           100:  * Take a packet (m) from clnp, strip off the clnp header
        !           101:  * and mke suitable for the idrp socket.
        !           102:  * No return value.  
        !           103:  */
        !           104: idrp_input(m, src, dst)
        !           105:        register struct mbuf *m;
        !           106:        struct sockaddr_iso *src, *dst;
        !           107: {
        !           108:        if (idrp_isop.isop_socket == 0) {
        !           109:        bad:    m_freem(m);
        !           110:                return 0;
        !           111:        }
        !           112:        bzero(idrp_addrs[0].siso_data, sizeof(idrp_addrs[0].siso_data));
        !           113:        bcopy((caddr_t)&(src->siso_addr), (caddr_t)&idrp_addrs[0].siso_addr,
        !           114:                1 + src->siso_nlen);
        !           115:        bzero(idrp_addrs[1].siso_data, sizeof(idrp_addrs[1].siso_data));
        !           116:        bcopy((caddr_t)&(dst->siso_addr), (caddr_t)&idrp_addrs[1].siso_addr,
        !           117:                1 + dst->siso_nlen);
        !           118:        if (sbappendaddr(&idrp_isop.isop_socket->so_rcv,
        !           119:                (struct sockaddr *)idrp_addrs, m, (struct mbuf *)0) == 0)
        !           120:                goto bad;
        !           121:        sorwakeup(idrp_isop.isop_socket);
        !           122:        return 0;
        !           123: }
        !           124: 
        !           125: idrp_output(m, addr)
        !           126:        struct mbuf *m, *addr;
        !           127: {
        !           128:        register struct sockaddr_iso *siso = mtod(addr, struct sockaddr_iso *);
        !           129:        int s = splnet(), i;
        !           130: 
        !           131:        bcopy((caddr_t)&(siso->siso_addr),
        !           132:              (caddr_t)&idrp_isop.isop_sfaddr.siso_addr, 1 + siso->siso_nlen);
        !           133:        siso++;
        !           134:        bcopy((caddr_t)&(siso->siso_addr),
        !           135:              (caddr_t)&idrp_isop.isop_sladdr.siso_addr, 1 + siso->siso_nlen);
        !           136:        i = clnp_output(m, idrp_isop, m->m_pkthdr.len, 0);
        !           137:        splx(s);
        !           138:        return (i);
        !           139: }
        !           140: 
        !           141: u_long idrp_sendspace = 3072;          /* really max datagram size */
        !           142: u_long idrp_recvspace = 40 * 1024;     /* 40 1K datagrams */
        !           143: 
        !           144: /*ARGSUSED*/
        !           145: idrp_usrreq(so, req, m, addr, control)
        !           146:        struct socket *so;
        !           147:        int req;
        !           148:        struct mbuf *m, *addr, *control;
        !           149: {
        !           150:        int error = 0;
        !           151: 
        !           152:         /* Note: need to block idrp_input while changing
        !           153:         * the udp pcb queue and/or pcb addresses.
        !           154:         */
        !           155:        switch (req) {
        !           156: 
        !           157:        case PRU_ATTACH:
        !           158:                if (idrp_isop.isop_socket != NULL) {
        !           159:                        error = ENXIO;
        !           160:                        break;
        !           161:                }
        !           162:                idrp_isop.isop_socket = so;
        !           163:                error = soreserve(so, idrp_sendspace, idrp_recvspace);
        !           164:                break;
        !           165: 
        !           166:        case PRU_SHUTDOWN:
        !           167:                socantsendmore(so);
        !           168:                break;
        !           169: 
        !           170:        case PRU_SEND:
        !           171:                return (idrp_output(m, addr));
        !           172: 
        !           173:        case PRU_ABORT:
        !           174:                soisdisconnected(so);
        !           175:        case PRU_DETACH:
        !           176:                idrp_isop.isop_socket = 0;
        !           177:                break;
        !           178: 
        !           179: 
        !           180:        case PRU_SENSE:
        !           181:                /*
        !           182:                 * stat: don't bother with a blocksize.
        !           183:                 */
        !           184:                return (0);
        !           185: 
        !           186:        default:
        !           187:                return (EOPNOTSUPP);    /* do not free mbuf's */
        !           188:        }
        !           189: 
        !           190: release:
        !           191:        if (control) {
        !           192:                printf("idrp control data unexpectedly retained\n");
        !           193:                m_freem(control);
        !           194:        }
        !           195:        if (m)
        !           196:                m_freem(m);
        !           197:        return (error);
        !           198: }

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