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 */ 32 33 #include <sys/param.h> 34 #include <sys/malloc.h> 35 #include <sys/socket.h> 36 #include <sys/socketvar.h> 37 #include <sys/domain.h> 38 #include <sys/protosw.h> 39 40 #include <net/raw_cb.h> 41 #include <net/netisr2.h> 42 43 /* 44 * Routines to manage the raw protocol control blocks. 45 * 46 * All of them must run in netisr0. 47 * 48 * TODO: 49 * hash lookups by protocol family/protocol + address family 50 * take care of unique address problems per AF? 51 * redo address binding to allow wildcards 52 */ 53 54 struct rawcb_list_head rawcb_list; 55 56 static u_long raw_sendspace = RAWSNDQ; 57 static u_long raw_recvspace = RAWRCVQ; 58 59 /* 60 * Allocate a control block and a nominal amount 61 * of buffer space for the socket. 62 * 63 * The so->so_pcb has already been assigned by the caller, and the 64 * caller has also already bumped the socket refs. 65 */ 66 int 67 raw_attach(struct socket *so, int proto, struct rlimit *rl) 68 { 69 struct rawcb *rp = sotorawcb(so); 70 int error; 71 72 ASSERT_NETISR0; 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 == NULL) 80 return (ENOBUFS); 81 error = soreserve(so, raw_sendspace, raw_recvspace, rl); 82 if (error) 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 88 LIST_INSERT_HEAD(&rawcb_list, rp, list); 89 90 return (0); 91 } 92 93 /* 94 * Detach the raw connection block and discard 95 * socket resources. 96 */ 97 void 98 raw_detach(struct rawcb *rp) 99 { 100 struct socket *so = rp->rcb_socket; 101 102 ASSERT_NETISR0; 103 104 LIST_REMOVE(rp, list); 105 106 so->so_pcb = NULL; 107 sofree(so); /* remove pcb ref */ 108 kfree(rp, M_PCB); 109 } 110 111 /* 112 * Disconnect and possibly release resources. 113 */ 114 void 115 raw_disconnect(struct rawcb *rp) 116 { 117 ASSERT_NETISR0; 118 119 if (rp->rcb_socket->so_state & SS_NOFDREF) 120 raw_detach(rp); 121 } 122 123 #ifdef notdef 124 #include <sys/mbuf.h> 125 126 int 127 raw_bind(struct socket *so, struct mbuf *nam) 128 { 129 struct sockaddr *addr = mtod(nam, struct sockaddr *); 130 struct rawcb *rp; 131 132 ASSERT_NETISR0; 133 134 if (ifnet == NULL) 135 return (EADDRNOTAVAIL); 136 rp = sotorawcb(so); 137 nam = m_copym(nam, 0, M_COPYALL, M_WAITOK); 138 rp->rcb_laddr = mtod(nam, struct sockaddr *); 139 return (0); 140 } 141 #endif 142