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Annotation of Net2/net/raw_cb.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980, 1986 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)raw_cb.c    7.11 (Berkeley) 6/28/90
        !            34:  */
        !            35: 
        !            36: #include "param.h"
        !            37: #include "systm.h"
        !            38: #include "mbuf.h"
        !            39: #include "socket.h"
        !            40: #include "socketvar.h"
        !            41: #include "domain.h"
        !            42: #include "protosw.h"
        !            43: #include "errno.h"
        !            44: 
        !            45: #include "if.h"
        !            46: #include "route.h"
        !            47: #include "raw_cb.h"
        !            48: #include "../netinet/in.h"
        !            49: 
        !            50: #include "machine/mtpr.h"
        !            51: 
        !            52: /*
        !            53:  * Routines to manage the raw protocol control blocks. 
        !            54:  *
        !            55:  * TODO:
        !            56:  *     hash lookups by protocol family/protocol + address family
        !            57:  *     take care of unique address problems per AF?
        !            58:  *     redo address binding to allow wildcards
        !            59:  */
        !            60: 
        !            61: u_long raw_sendspace = RAWSNDQ;
        !            62: u_long raw_recvspace = RAWRCVQ;
        !            63: 
        !            64: /*
        !            65:  * Allocate a control block and a nominal amount
        !            66:  * of buffer space for the socket.
        !            67:  */
        !            68: raw_attach(so, proto)
        !            69:        register struct socket *so;
        !            70:        int proto;
        !            71: {
        !            72:        register struct rawcb *rp = sotorawcb(so);
        !            73:        int error;
        !            74: 
        !            75:        /*
        !            76:         * It is assumed that raw_attach is called
        !            77:         * after space has been allocated for the
        !            78:         * rawcb.
        !            79:         */
        !            80:        if (rp == 0)
        !            81:                return (ENOBUFS);
        !            82:        if (error = soreserve(so, raw_sendspace, raw_recvspace))
        !            83:                return (error);
        !            84:        rp->rcb_socket = so;
        !            85:        rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
        !            86:        rp->rcb_proto.sp_protocol = proto;
        !            87:        insque(rp, &rawcb);
        !            88:        return (0);
        !            89: }
        !            90: 
        !            91: /*
        !            92:  * Detach the raw connection block and discard
        !            93:  * socket resources.
        !            94:  */
        !            95: raw_detach(rp)
        !            96:        register struct rawcb *rp;
        !            97: {
        !            98:        struct socket *so = rp->rcb_socket;
        !            99: 
        !           100:        so->so_pcb = 0;
        !           101:        sofree(so);
        !           102:        remque(rp);
        !           103: #ifdef notdef
        !           104:        if (rp->rcb_laddr)
        !           105:                m_freem(dtom(rp->rcb_laddr));
        !           106:        rp->rcb_laddr = 0;
        !           107: #endif
        !           108:        free((caddr_t)(rp), M_PCB);
        !           109: }
        !           110: 
        !           111: /*
        !           112:  * Disconnect and possibly release resources.
        !           113:  */
        !           114: raw_disconnect(rp)
        !           115:        struct rawcb *rp;
        !           116: {
        !           117: 
        !           118: #ifdef notdef
        !           119:        if (rp->rcb_faddr)
        !           120:                m_freem(dtom(rp->rcb_faddr));
        !           121:        rp->rcb_faddr = 0;
        !           122: #endif
        !           123:        if (rp->rcb_socket->so_state & SS_NOFDREF)
        !           124:                raw_detach(rp);
        !           125: }
        !           126: 
        !           127: #ifdef notdef
        !           128: raw_bind(so, nam)
        !           129:        register struct socket *so;
        !           130:        struct mbuf *nam;
        !           131: {
        !           132:        struct sockaddr *addr = mtod(nam, struct sockaddr *);
        !           133:        register struct rawcb *rp;
        !           134: 
        !           135:        if (ifnet == 0)
        !           136:                return (EADDRNOTAVAIL);
        !           137:        rp = sotorawcb(so);
        !           138:        nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
        !           139:        rp->rcb_laddr = mtod(nam, struct sockaddr *);
        !           140:        return (0);
        !           141: }
        !           142: #endif

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