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Annotation of XNU/bsd/net/raw_cb.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) 1980, 1986, 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:  *     @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
        !            55:  */
        !            56: 
        !            57: #include <sys/param.h>
        !            58: #include <sys/malloc.h>
        !            59: #include <sys/socket.h>
        !            60: #include <sys/socketvar.h>
        !            61: #include <sys/domain.h>
        !            62: #include <sys/protosw.h>
        !            63: 
        !            64: #include <net/raw_cb.h>
        !            65: 
        !            66: /*
        !            67:  * Routines to manage the raw protocol control blocks.
        !            68:  *
        !            69:  * TODO:
        !            70:  *     hash lookups by protocol family/protocol + address family
        !            71:  *     take care of unique address problems per AF?
        !            72:  *     redo address binding to allow wildcards
        !            73:  */
        !            74: 
        !            75: struct rawcb_list_head rawcb_list;
        !            76: 
        !            77: static u_long  raw_sendspace = RAWSNDQ;
        !            78: static u_long  raw_recvspace = RAWRCVQ;
        !            79: 
        !            80: /*
        !            81:  * Allocate a control block and a nominal amount
        !            82:  * of buffer space for the socket.
        !            83:  */
        !            84: int
        !            85: raw_attach(so, proto)
        !            86:        register struct socket *so;
        !            87:        int proto;
        !            88: {
        !            89:        register struct rawcb *rp = sotorawcb(so);
        !            90:        int error;
        !            91: 
        !            92:        /*
        !            93:         * It is assumed that raw_attach is called
        !            94:         * after space has been allocated for the
        !            95:         * rawcb.
        !            96:         */
        !            97:        if (rp == 0)
        !            98:                return (ENOBUFS);
        !            99:        error = soreserve(so, raw_sendspace, raw_recvspace);
        !           100:        if (error)
        !           101:                return (error);
        !           102:        rp->rcb_socket = so;
        !           103:        rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
        !           104:        rp->rcb_proto.sp_protocol = proto;
        !           105:        LIST_INSERT_HEAD(&rawcb_list, rp, list);
        !           106:        return (0);
        !           107: }
        !           108: 
        !           109: /*
        !           110:  * Detach the raw connection block and discard
        !           111:  * socket resources.
        !           112:  */
        !           113: void
        !           114: raw_detach(rp)
        !           115:        register struct rawcb *rp;
        !           116: {
        !           117:        struct socket *so = rp->rcb_socket;
        !           118: 
        !           119:        so->so_pcb = 0;
        !           120:        sofree(so);
        !           121:        LIST_REMOVE(rp, list);
        !           122: #ifdef notdef
        !           123:        if (rp->rcb_laddr)
        !           124:                m_freem(dtom(rp->rcb_laddr));
        !           125:        rp->rcb_laddr = 0;
        !           126: #endif
        !           127:        FREE((caddr_t)(rp), M_PCB);
        !           128: }
        !           129: 
        !           130: /*
        !           131:  * Disconnect and possibly release resources.
        !           132:  */
        !           133: void
        !           134: raw_disconnect(rp)
        !           135:        struct rawcb *rp;
        !           136: {
        !           137: 
        !           138: #ifdef notdef
        !           139:        if (rp->rcb_faddr)
        !           140:                m_freem(dtom(rp->rcb_faddr));
        !           141:        rp->rcb_faddr = 0;
        !           142: #endif
        !           143:        if (rp->rcb_socket->so_state & SS_NOFDREF)
        !           144:                raw_detach(rp);
        !           145: }
        !           146: 
        !           147: #ifdef notdef
        !           148: #include <sys/mbuf.h>
        !           149: 
        !           150: int
        !           151: raw_bind(so, nam)
        !           152:        register struct socket *so;
        !           153:        struct mbuf *nam;
        !           154: {
        !           155:        struct sockaddr *addr = mtod(nam, struct sockaddr *);
        !           156:        register struct rawcb *rp;
        !           157: 
        !           158:        if (ifnet == 0)
        !           159:                return (EADDRNOTAVAIL);
        !           160:        rp = sotorawcb(so);
        !           161:        nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
        !           162:        rp->rcb_laddr = mtod(nam, struct sockaddr *);
        !           163:        return (0);
        !           164: }
        !           165: #endif

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