raw_cb.c revision 1.18
1/* $NetBSD: raw_cb.c,v 1.18 2007/03/04 06:03:18 christos Exp $ */ 2 3/* 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93 32 */ 33 34#include <sys/cdefs.h> 35__KERNEL_RCSID(0, "$NetBSD: raw_cb.c,v 1.18 2007/03/04 06:03:18 christos Exp $"); 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/mbuf.h> 40#include <sys/socket.h> 41#include <sys/socketvar.h> 42#include <sys/domain.h> 43#include <sys/protosw.h> 44#include <sys/errno.h> 45 46#include <net/if.h> 47#include <net/route.h> 48#include <net/raw_cb.h> 49#include <netinet/in.h> 50 51/* 52 * Routines to manage the raw protocol control blocks. 53 * 54 * TODO: 55 * hash lookups by protocol family/protocol + address family 56 * take care of unique address problems per AF? 57 * redo address binding to allow wildcards 58 */ 59 60struct rawcbhead rawcb = LIST_HEAD_INITIALIZER(rawcb); 61 62u_long raw_sendspace = RAWSNDQ; 63u_long raw_recvspace = RAWRCVQ; 64 65/* 66 * Allocate a control block and a nominal amount 67 * of buffer space for the socket. 68 */ 69int 70raw_attach(struct socket *so, int proto) 71{ 72 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)) != 0) 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 LIST_INSERT_HEAD(&rawcb, rp, rcb_list); 88 return (0); 89} 90 91/* 92 * Detach the raw connection block and discard 93 * socket resources. 94 */ 95void 96raw_detach(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((void *)rp, M_PCB); 109} 110 111/* 112 * Disconnect and possibly release resources. 113 */ 114void 115raw_disconnect(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