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Annotation of sys/net/raw_cb.c, Revision 1.1.1.1

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