1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. 6 * 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_usrreq.c 8.1 (Berkeley) 6/10/93 33 * $FreeBSD$ 34 */ 35 36#include <sys/param.h> 37#include <sys/kernel.h> 38#include <sys/lock.h> 39#include <sys/malloc.h> 40#include <sys/mbuf.h> 41#include <sys/mutex.h> 42#include <sys/priv.h> 43#include <sys/protosw.h> 44#include <sys/signalvar.h> 45#include <sys/socket.h> 46#include <sys/socketvar.h> 47#include <sys/sx.h> 48#include <sys/systm.h> 49 50#include <net/if.h> 51#include <net/vnet.h> 52#include <net/raw_cb.h> 53 54MTX_SYSINIT(rawcb_mtx, &rawcb_mtx, "rawcb", MTX_DEF); 55 56/* 57 * Initialize raw connection block q. 58 */ 59void 60raw_init(void) 61{ 62 63 LIST_INIT(&V_rawcb_list); 64} 65 66/* 67 * Raw protocol input routine. Find the socket associated with the packet(s) 68 * and move them over. If nothing exists for this packet, drop it. 69 */ 70/* 71 * Raw protocol interface. 72 */ 73void 74raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src) 75{ 76 77 return (raw_input_ext(m0, proto, src, NULL)); 78} 79 80void 81raw_input_ext(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src, 82 raw_input_cb_fn cb) 83{ 84 struct rawcb *rp; 85 struct mbuf *m = m0; 86 struct socket *last; 87 88 last = NULL; 89 mtx_lock(&rawcb_mtx); 90 LIST_FOREACH(rp, &V_rawcb_list, list) { 91 if (rp->rcb_proto.sp_family != proto->sp_family) 92 continue; 93 if (rp->rcb_proto.sp_protocol && 94 rp->rcb_proto.sp_protocol != proto->sp_protocol) 95 continue; 96 if (cb != NULL && (*cb)(m, proto, src, rp) != 0) 97 continue; 98 if (last) { 99 struct mbuf *n; 100 n = m_copym(m, 0, M_COPYALL, M_NOWAIT); 101 if (n) { 102 if (sbappendaddr(&last->so_rcv, src, 103 n, (struct mbuf *)0) == 0) 104 /* should notify about lost packet */ 105 m_freem(n); 106 else 107 sorwakeup(last); 108 } 109 } 110 last = rp->rcb_socket; 111 } 112 if (last) { 113 if (sbappendaddr(&last->so_rcv, src, 114 m, (struct mbuf *)0) == 0) 115 m_freem(m); 116 else 117 sorwakeup(last); 118 } else 119 m_freem(m); 120 mtx_unlock(&rawcb_mtx); 121} 122 123/*ARGSUSED*/ 124void 125raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) 126{ 127 128 if (cmd < 0 || cmd >= PRC_NCMDS) 129 return; 130 /* INCOMPLETE */ 131} 132 133static void 134raw_uabort(struct socket *so) 135{ 136 137 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL")); 138 139 soisdisconnected(so); 140} 141 142static void 143raw_uclose(struct socket *so) 144{ 145 146 KASSERT(sotorawcb(so) != NULL, ("raw_uabort: rp == NULL")); 147 148 soisdisconnected(so); 149} 150 151/* pru_accept is EOPNOTSUPP */ 152 153static int 154raw_uattach(struct socket *so, int proto, struct thread *td) 155{ 156 int error; 157 158 /* 159 * Implementors of raw sockets will already have allocated the PCB, 160 * so it must be non-NULL here. 161 */ 162 KASSERT(sotorawcb(so) != NULL, ("raw_uattach: so_pcb == NULL")); 163 164 if (td != NULL) { 165 error = priv_check(td, PRIV_NET_RAW); 166 if (error) 167 return (error); 168 } 169 return (raw_attach(so, proto)); 170} 171 172static int 173raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 174{ 175 176 return (EINVAL); 177} 178 179static int 180raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 181{ 182 183 return (EINVAL); 184} 185 186/* pru_connect2 is EOPNOTSUPP */ 187/* pru_control is EOPNOTSUPP */ 188 189static void 190raw_udetach(struct socket *so) 191{ 192 struct rawcb *rp = sotorawcb(so); 193 194 KASSERT(rp != NULL, ("raw_udetach: rp == NULL")); 195 196 raw_detach(rp); 197} 198 199static int 200raw_udisconnect(struct socket *so) 201{ 202 203 KASSERT(sotorawcb(so) != NULL, ("raw_udisconnect: rp == NULL")); 204 205 return (ENOTCONN); 206} 207 208/* pru_listen is EOPNOTSUPP */ 209 210static int 211raw_upeeraddr(struct socket *so, struct sockaddr **nam) 212{ 213 214 KASSERT(sotorawcb(so) != NULL, ("raw_upeeraddr: rp == NULL")); 215 216 return (ENOTCONN); 217} 218 219/* pru_rcvd is EOPNOTSUPP */ 220/* pru_rcvoob is EOPNOTSUPP */ 221 222static int 223raw_usend(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 224 struct mbuf *control, struct thread *td) 225{ 226 227 KASSERT(sotorawcb(so) != NULL, ("raw_usend: rp == NULL")); 228 229 if ((flags & PRUS_OOB) || (control && control->m_len)) { 230 if (m != NULL) 231 m_freem(m); 232 if (control != NULL) 233 m_freem(control); 234 return (EOPNOTSUPP); 235 } 236 237 /* 238 * For historical (bad?) reasons, we effectively ignore the address 239 * argument to sendto(2). Perhaps we should return an error instead? 240 */ 241 return ((*so->so_proto->pr_output)(m, so)); 242} 243 244/* pru_sense is null */ 245 246static int 247raw_ushutdown(struct socket *so) 248{ 249 250 KASSERT(sotorawcb(so) != NULL, ("raw_ushutdown: rp == NULL")); 251 252 socantsendmore(so); 253 return (0); 254} 255 256static int 257raw_usockaddr(struct socket *so, struct sockaddr **nam) 258{ 259 260 KASSERT(sotorawcb(so) != NULL, ("raw_usockaddr: rp == NULL")); 261 262 return (EINVAL); 263} 264 265struct pr_usrreqs raw_usrreqs = { 266 .pru_abort = raw_uabort, 267 .pru_attach = raw_uattach, 268 .pru_bind = raw_ubind, 269 .pru_connect = raw_uconnect, 270 .pru_detach = raw_udetach, 271 .pru_disconnect = raw_udisconnect, 272 .pru_peeraddr = raw_upeeraddr, 273 .pru_send = raw_usend, 274 .pru_shutdown = raw_ushutdown, 275 .pru_sockaddr = raw_usockaddr, 276 .pru_close = raw_uclose, 277}; 278