raw_usrreq.c revision 257135
1/*- 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 31 * $FreeBSD: head/sys/net/raw_usrreq.c 257135 2013-10-25 19:49:03Z glebius $ 32 */ 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/lock.h> 37#include <sys/malloc.h> 38#include <sys/mbuf.h> 39#include <sys/mutex.h> 40#include <sys/priv.h> 41#include <sys/protosw.h> 42#include <sys/signalvar.h> 43#include <sys/socket.h> 44#include <sys/socketvar.h> 45#include <sys/sx.h> 46#include <sys/systm.h> 47 48#include <net/if.h> 49#include <net/vnet.h> 50#include <net/raw_cb.h> 51 52MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF); 53 54/* 55 * Initialize raw connection block q. 56 */ 57void 58raw_init(void) 59{ 60 61 LIST_INIT(&V_rawcb_list); 62} 63 64/* 65 * Raw protocol input routine. Find the socket associated with the packet(s) 66 * and move them over. If nothing exists for this packet, drop it. 67 */ 68/* 69 * Raw protocol interface. 70 */ 71void 72raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src) 73{ 74 75 return (raw_input_ext(m0, proto, src, NULL)); 76} 77 78void 79raw_input_ext(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src, 80 raw_input_cb_fn cb) 81{ 82 struct rawcb *rp; 83 struct mbuf *m = m0; 84 struct socket *last; 85 86 last = 0; 87 mtx_lock(&rawcb_mtx); 88 LIST_FOREACH(rp, &V_rawcb_list, list) { 89 if (rp->rcb_proto.sp_family != proto->sp_family) 90 continue; 91 if (rp->rcb_proto.sp_protocol && 92 rp->rcb_proto.sp_protocol != proto->sp_protocol) 93 continue; 94 if (cb != NULL && (*cb)(m, proto, src, rp) != 0) 95 continue; 96 if (last) { 97 struct mbuf *n; 98 n = m_copy(m, 0, (int)M_COPYALL); 99 if (n) { 100 if (sbappendaddr(&last->so_rcv, src, 101 n, (struct mbuf *)0) == 0) 102 /* should notify about lost packet */ 103 m_freem(n); 104 else 105 sorwakeup(last); 106 } 107 } 108 last = rp->rcb_socket; 109 } 110 if (last) { 111 if (sbappendaddr(&last->so_rcv, src, 112 m, (struct mbuf *)0) == 0) 113 m_freem(m); 114 else 115 sorwakeup(last); 116 } else 117 m_freem(m); 118 mtx_unlock(&rawcb_mtx); 119} 120 121/*ARGSUSED*/ 122void 123raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) 124{ 125 126 if (cmd < 0 || cmd >= PRC_NCMDS) 127 return; 128 /* INCOMPLETE */ 129} 130 131static void 132raw_uabort(struct socket *so) 133{ 134 135 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL")); 136 137 soisdisconnected(so); 138} 139 140static void 141raw_uclose(struct socket *so) 142{ 143 144 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL")); 145 146 soisdisconnected(so); 147} 148 149/* pru_accept is EOPNOTSUPP */ 150 151static int 152raw_uattach(struct socket *so, int proto, struct thread *td) 153{ 154 int error; 155 156 /* 157 * Implementors of raw sockets will already have allocated the PCB, 158 * so it must be non-NULL here. 159 */ 160 KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL")); 161 162 if (td != NULL) { 163 error = priv_check(td, PRIV_NET_RAW); 164 if (error) 165 return (error); 166 } 167 return (raw_attach(so, proto)); 168} 169 170static int 171raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 172{ 173 174 return (EINVAL); 175} 176 177static int 178raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 179{ 180 181 return (EINVAL); 182} 183 184/* pru_connect2 is EOPNOTSUPP */ 185/* pru_control is EOPNOTSUPP */ 186 187static void 188raw_udetach(struct socket *so) 189{ 190 struct rawcb *rp = sotorawcb(so); 191 192 KASSERT(rp != NULL, ("raw_udetach: rp == NULL")); 193 194 raw_detach(rp); 195} 196 197static int 198raw_udisconnect(struct socket *so) 199{ 200 201 KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL")); 202 203 return (ENOTCONN); 204} 205 206/* pru_listen is EOPNOTSUPP */ 207 208static int 209raw_upeeraddr(struct socket *so, struct sockaddr **nam) 210{ 211 212 KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL")); 213 214 return (ENOTCONN); 215} 216 217/* pru_rcvd is EOPNOTSUPP */ 218/* pru_rcvoob is EOPNOTSUPP */ 219 220static int 221raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 222 struct mbuf *control, struct thread *td) 223{ 224 225 KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL")); 226 227 if ((flags & PRUS_OOB) || (control && control->m_len)) { 228 /* XXXRW: Should control also be freed here? */ 229 if (m != NULL) 230 m_freem(m); 231 return (EOPNOTSUPP); 232 } 233 234 /* 235 * For historical (bad?) reasons, we effectively ignore the address 236 * argument to sendto(2). Perhaps we should return an error instead? 237 */ 238 return ((*so->so_proto->pr_output)(m, so)); 239} 240 241/* pru_sense is null */ 242 243static int 244raw_ushutdown(struct socket *so) 245{ 246 247 KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL")); 248 249 socantsendmore(so); 250 return (0); 251} 252 253static int 254raw_usockaddr(struct socket *so, struct sockaddr **nam) 255{ 256 257 KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL")); 258 259 return (EINVAL); 260} 261 262struct pr_usrreqs raw_usrreqs = { 263 .pru_abort = raw_uabort, 264 .pru_attach = raw_uattach, 265 .pru_bind = raw_ubind, 266 .pru_connect = raw_uconnect, 267 .pru_detach = raw_udetach, 268 .pru_disconnect = raw_udisconnect, 269 .pru_peeraddr = raw_upeeraddr, 270 .pru_send = raw_usend, 271 .pru_shutdown = raw_ushutdown, 272 .pru_sockaddr = raw_usockaddr, 273 .pru_close = raw_uclose, 274}; 275