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Annotation of sys/net/raw_cb.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: raw_cb.c,v 1.5 2003/12/10 07:22:42 itojun Exp $       */
        !             2: /*     $NetBSD: raw_cb.c,v 1.9 1996/02/13 22:00:39 christos Exp $      */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1980, 1986, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. Neither the name of the University nor the names of its contributors
        !            17:  *    may be used to endorse or promote products derived from this software
        !            18:  *    without specific prior written permission.
        !            19:  *
        !            20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            30:  * SUCH DAMAGE.
        !            31:  *
        !            32:  *     @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
        !            33:  */
        !            34:
        !            35: #include <sys/param.h>
        !            36: #include <sys/systm.h>
        !            37: #include <sys/mbuf.h>
        !            38: #include <sys/socket.h>
        !            39: #include <sys/socketvar.h>
        !            40: #include <sys/domain.h>
        !            41: #include <sys/protosw.h>
        !            42: #include <sys/errno.h>
        !            43:
        !            44: #include <net/if.h>
        !            45: #include <net/route.h>
        !            46: #include <net/raw_cb.h>
        !            47: #include <netinet/in.h>
        !            48:
        !            49: /*
        !            50:  * Routines to manage the raw protocol control blocks.
        !            51:  *
        !            52:  * TODO:
        !            53:  *     hash lookups by protocol family/protocol + address family
        !            54:  *     take care of unique address problems per AF?
        !            55:  *     redo address binding to allow wildcards
        !            56:  */
        !            57:
        !            58: u_long raw_sendspace = RAWSNDQ;
        !            59: u_long raw_recvspace = RAWRCVQ;
        !            60: struct rawcbhead rawcb;
        !            61:
        !            62: /*
        !            63:  * Allocate a control block and a nominal amount
        !            64:  * of buffer space for the socket.
        !            65:  */
        !            66: int
        !            67: raw_attach(so, proto)
        !            68:        struct socket *so;
        !            69:        int proto;
        !            70: {
        !            71:        struct rawcb *rp = sotorawcb(so);
        !            72:        int error;
        !            73:
        !            74:        /*
        !            75:         * It is assumed that raw_attach is called
        !            76:         * after space has been allocated for the
        !            77:         * rawcb.
        !            78:         */
        !            79:        if (rp == 0)
        !            80:                return (ENOBUFS);
        !            81:        if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
        !            82:                return (error);
        !            83:        rp->rcb_socket = so;
        !            84:        rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
        !            85:        rp->rcb_proto.sp_protocol = proto;
        !            86:        LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
        !            87:        return (0);
        !            88: }
        !            89:
        !            90: /*
        !            91:  * Detach the raw connection block and discard
        !            92:  * socket resources.
        !            93:  */
        !            94: void
        !            95: raw_detach(rp)
        !            96:        struct rawcb *rp;
        !            97: {
        !            98:        struct socket *so = rp->rcb_socket;
        !            99:
        !           100:        so->so_pcb = 0;
        !           101:        sofree(so);
        !           102:        LIST_REMOVE(rp, rcb_list);
        !           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: void
        !           115: raw_disconnect(rp)
        !           116:        struct rawcb *rp;
        !           117: {
        !           118:
        !           119: #ifdef notdef
        !           120:        if (rp->rcb_faddr)
        !           121:                m_freem(dtom(rp->rcb_faddr));
        !           122:        rp->rcb_faddr = 0;
        !           123: #endif
        !           124:        if (rp->rcb_socket->so_state & SS_NOFDREF)
        !           125:                raw_detach(rp);
        !           126: }
        !           127:
        !           128: #ifdef notdef
        !           129: int
        !           130: raw_bind(so, nam)
        !           131:        struct socket *so;
        !           132:        struct mbuf *nam;
        !           133: {
        !           134:        struct sockaddr *addr = mtod(nam, struct sockaddr *);
        !           135:        struct rawcb *rp;
        !           136:
        !           137:        if (ifnet == 0)
        !           138:                return (EADDRNOTAVAIL);
        !           139:        rp = sotorawcb(so);
        !           140:        nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
        !           141:        rp->rcb_laddr = mtod(nam, struct sockaddr *);
        !           142:        return (0);
        !           143: }
        !           144: #endif