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Annotation of kernel/bsd/net/raw_cb.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: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            26: /*
        !            27:  * Copyright (c) 1980, 1986, 1993
        !            28:  *     The Regents of the University of California.  All rights reserved.
        !            29:  *
        !            30:  * Redistribution and use in source and binary forms, with or without
        !            31:  * modification, are permitted provided that the following conditions
        !            32:  * are met:
        !            33:  * 1. Redistributions of source code must retain the above copyright
        !            34:  *    notice, this list of conditions and the following disclaimer.
        !            35:  * 2. Redistributions in binary form must reproduce the above copyright
        !            36:  *    notice, this list of conditions and the following disclaimer in the
        !            37:  *    documentation and/or other materials provided with the distribution.
        !            38:  * 3. All advertising materials mentioning features or use of this software
        !            39:  *    must display the following acknowledgement:
        !            40:  *     This product includes software developed by the University of
        !            41:  *     California, Berkeley and its contributors.
        !            42:  * 4. Neither the name of the University nor the names of its contributors
        !            43:  *    may be used to endorse or promote products derived from this software
        !            44:  *    without specific prior written permission.
        !            45:  *
        !            46:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            47:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            48:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            49:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            50:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            51:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            52:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            53:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            54:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            55:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            56:  * SUCH DAMAGE.
        !            57:  *
        !            58:  *     @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
        !            59:  */
        !            60: 
        !            61: #include <sys/param.h>
        !            62: #include <sys/systm.h>
        !            63: #include <sys/mbuf.h>
        !            64: #include <sys/socket.h>
        !            65: #include <sys/socketvar.h>
        !            66: #include <sys/domain.h>
        !            67: #include <sys/protosw.h>
        !            68: #include <sys/errno.h>
        !            69: #include <sys/malloc.h>
        !            70: 
        !            71: #include <net/if.h>
        !            72: #include <net/route.h>
        !            73: #include <net/raw_cb.h>
        !            74: #include <netinet/in.h>
        !            75: 
        !            76: /*
        !            77:  * Routines to manage the raw protocol control blocks. 
        !            78:  *
        !            79:  * TODO:
        !            80:  *     hash lookups by protocol family/protocol + address family
        !            81:  *     take care of unique address problems per AF?
        !            82:  *     redo address binding to allow wildcards
        !            83:  */
        !            84: 
        !            85: u_long raw_sendspace = RAWSNDQ;
        !            86: u_long raw_recvspace = RAWRCVQ;
        !            87: 
        !            88: /*
        !            89:  * Allocate a control block and a nominal amount
        !            90:  * of buffer space for the socket.
        !            91:  */
        !            92: int
        !            93: raw_attach(so, proto)
        !            94:        register struct socket *so;
        !            95:        int proto;
        !            96: {
        !            97:        register struct rawcb *rp = sotorawcb(so);
        !            98:        int error;
        !            99: 
        !           100:        /*
        !           101:         * It is assumed that raw_attach is called
        !           102:         * after space has been allocated for the
        !           103:         * rawcb.
        !           104:         */
        !           105:        if (rp == 0)
        !           106:                return (ENOBUFS);
        !           107:        if ((error = soreserve(so, raw_sendspace, raw_recvspace)))
        !           108:                return (error);
        !           109:        rp->rcb_socket = so;
        !           110:        rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
        !           111:        rp->rcb_proto.sp_protocol = proto;
        !           112:        insque((struct queue_entry *)rp, (struct queue_entry *)&rawcb);
        !           113:        return (0);
        !           114: }
        !           115: 
        !           116: /*
        !           117:  * Detach the raw connection block and discard
        !           118:  * socket resources.
        !           119:  */
        !           120: void
        !           121: raw_detach(rp)
        !           122:        register struct rawcb *rp;
        !           123: {
        !           124:        struct socket *so = rp->rcb_socket;
        !           125: 
        !           126:        so->so_pcb = 0;
        !           127:        sofree(so);
        !           128:        remque((struct queue_entry *)rp);
        !           129: #ifdef notdef
        !           130:        if (rp->rcb_laddr)
        !           131:                m_freem(dtom(rp->rcb_laddr));
        !           132:        rp->rcb_laddr = 0;
        !           133: #endif
        !           134:        _FREE((caddr_t)(rp), M_PCB);
        !           135: }
        !           136: 
        !           137: /*
        !           138:  * Disconnect and possibly release resources.
        !           139:  */
        !           140: void
        !           141: raw_disconnect(rp)
        !           142:        struct rawcb *rp;
        !           143: {
        !           144: 
        !           145: #ifdef notdef
        !           146:        if (rp->rcb_faddr)
        !           147:                m_freem(dtom(rp->rcb_faddr));
        !           148:        rp->rcb_faddr = 0;
        !           149: #endif
        !           150:        if (rp->rcb_socket->so_state & SS_NOFDREF)
        !           151:                raw_detach(rp);
        !           152: }
        !           153: 
        !           154: #ifdef notdef
        !           155: int
        !           156: raw_bind(so, nam)
        !           157:        register struct socket *so;
        !           158:        struct mbuf *nam;
        !           159: {
        !           160:        struct sockaddr *addr = mtod(nam, struct sockaddr *);
        !           161:        register struct rawcb *rp;
        !           162: 
        !           163:        if (ifnet == 0)
        !           164:                return (EADDRNOTAVAIL);
        !           165:        rp = sotorawcb(so);
        !           166:        nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
        !           167:        rp->rcb_laddr = mtod(nam, struct sockaddr *);
        !           168:        return (0);
        !           169: }
        !           170: #endif

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