1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93 30 * $FreeBSD: src/sys/net/raw_cb.c,v 1.16 1999/08/28 00:48:27 peter Exp $ 31 * $DragonFly: src/sys/net/raw_cb.c,v 1.11 2006/09/05 00:55:46 dillon Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/malloc.h> 36 #include <sys/socket.h> 37 #include <sys/socketvar.h> 38 #include <sys/domain.h> 39 #include <sys/protosw.h> 40 41 #include <net/raw_cb.h> 42 43 /* 44 * Routines to manage the raw protocol control blocks. 45 * 46 * TODO: 47 * hash lookups by protocol family/protocol + address family 48 * take care of unique address problems per AF? 49 * redo address binding to allow wildcards 50 */ 51 52 struct rawcb_list_head rawcb_list; 53 54 static u_long raw_sendspace = RAWSNDQ; 55 static u_long raw_recvspace = RAWRCVQ; 56 57 /* 58 * Allocate a control block and a nominal amount 59 * of buffer space for the socket. 60 * 61 * The so->so_pcb has already been assigned by the caller, and the 62 * caller has also already bumped the socket refs. 63 */ 64 int 65 raw_attach(struct socket *so, int proto, struct rlimit *rl) 66 { 67 struct rawcb *rp = sotorawcb(so); 68 int error; 69 70 /* 71 * It is assumed that raw_attach is called 72 * after space has been allocated for the 73 * rawcb. 74 */ 75 if (rp == NULL) 76 return (ENOBUFS); 77 error = soreserve(so, raw_sendspace, raw_recvspace, rl); 78 if (error) 79 return (error); 80 rp->rcb_socket = so; 81 rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family; 82 rp->rcb_proto.sp_protocol = proto; 83 LIST_INSERT_HEAD(&rawcb_list, rp, list); 84 return (0); 85 } 86 87 /* 88 * Detach the raw connection block and discard 89 * socket resources. 90 */ 91 void 92 raw_detach(struct rawcb *rp) 93 { 94 struct socket *so = rp->rcb_socket; 95 96 so->so_pcb = NULL; 97 sofree(so); /* remove pcb ref */ 98 LIST_REMOVE(rp, list); 99 kfree(rp, M_PCB); 100 } 101 102 /* 103 * Disconnect and possibly release resources. 104 */ 105 void 106 raw_disconnect(struct rawcb *rp) 107 { 108 if (rp->rcb_socket->so_state & SS_NOFDREF) 109 raw_detach(rp); 110 } 111 112 #ifdef notdef 113 #include <sys/mbuf.h> 114 115 int 116 raw_bind(struct socket *so, struct mbuf *nam) 117 { 118 struct sockaddr *addr = mtod(nam, struct sockaddr *); 119 struct rawcb *rp; 120 121 if (ifnet == NULL) 122 return (EADDRNOTAVAIL); 123 rp = sotorawcb(so); 124 nam = m_copym(nam, 0, M_COPYALL, MB_TRYWAIT); 125 rp->rcb_laddr = mtod(nam, struct sockaddr *); 126 return (0); 127 } 128 #endif 129