1/* 2 * Copyright (c) 2000-2010 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Copyright (c) 1980, 1986, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Berkeley and its contributors. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 61 * $FreeBSD: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $ 62 */ 63 64#include <sys/param.h> 65#include <sys/systm.h> 66#include <sys/mbuf.h> 67#include <sys/proc.h> 68#include <sys/domain.h> 69#include <sys/protosw.h> 70#include <sys/socket.h> 71#include <sys/socketvar.h> 72#include <kern/locks.h> 73 74#include <net/raw_cb.h> 75 76decl_lck_mtx_data(,raw_mtx_data); /*### global raw cb mutex for now */ 77lck_mtx_t *raw_mtx = &raw_mtx_data; 78lck_attr_t *raw_mtx_attr; 79lck_grp_t *raw_mtx_grp; 80lck_grp_attr_t *raw_mtx_grp_attr; 81/* 82 * Initialize raw connection block q. 83 */ 84void 85raw_init(void) 86{ 87 raw_mtx_grp_attr = lck_grp_attr_alloc_init(); 88 89 raw_mtx_grp = lck_grp_alloc_init("rawcb", raw_mtx_grp_attr); 90 91 raw_mtx_attr = lck_attr_alloc_init(); 92 93 lck_mtx_init(raw_mtx, raw_mtx_grp, raw_mtx_attr); 94 LIST_INIT(&rawcb_list); 95} 96 97 98/* 99 * Raw protocol input routine. Find the socket 100 * associated with the packet(s) and move them over. If 101 * nothing exists for this packet, drop it. 102 */ 103/* 104 * Raw protocol interface. 105 */ 106void 107raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src, 108 struct sockaddr *dst) 109{ 110 struct rawcb *rp; 111 struct mbuf *m = m0; 112 int sockets = 0; 113 struct socket *last; 114 int error; 115 116//####LD raw_input is called from many places, input & output path. We have to assume the 117//####LD socket we'll find and need to append to is unlocked. 118//####LD calls from the output (locked) path need to make sure the socket is not locked when 119//####LD we call in raw_input 120 last = NULL; 121 lck_mtx_lock(raw_mtx); 122 LIST_FOREACH(rp, &rawcb_list, list) { 123 if (rp->rcb_proto.sp_family != proto->sp_family) 124 continue; 125 if (rp->rcb_proto.sp_protocol && 126 rp->rcb_proto.sp_protocol != proto->sp_protocol) 127 continue; 128 /* 129 * We assume the lower level routines have 130 * placed the address in a canonical format 131 * suitable for a structure comparison. 132 * 133 * Note that if the lengths are not the same 134 * the comparison will fail at the first byte. 135 */ 136#define equal(a1, a2) \ 137 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 138 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 139 continue; 140 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 141 continue; 142 if (last) { 143 struct mbuf *n; 144 n = m_copy(m, 0, (int)M_COPYALL); 145 if (n) { 146 socket_lock(last, 1); 147 if (sbappendaddr(&last->so_rcv, src, 148 n, (struct mbuf *)0, &error) != 0) { 149 sorwakeup(last); 150 sockets++; 151 } 152 socket_unlock(last, 1); 153 } 154 } 155 last = rp->rcb_socket; 156 } 157 if (last) { 158 socket_lock(last, 1); 159 if (sbappendaddr(&last->so_rcv, src, 160 m, (struct mbuf *)0, &error) != 0) { 161 sorwakeup(last); 162 sockets++; 163 } 164 socket_unlock(last, 1); 165 } else 166 m_freem(m); 167 lck_mtx_unlock(raw_mtx); 168} 169 170/*ARGSUSED*/ 171void 172raw_ctlinput(int cmd, __unused struct sockaddr *arg, __unused void *dummy) 173{ 174 175 if (cmd < 0 || cmd > PRC_NCMDS) 176 return; 177 /* INCOMPLETE */ 178} 179 180static int 181raw_uabort(struct socket *so) 182{ 183 struct rawcb *rp = sotorawcb(so); 184 185 lck_mtx_t * mutex_held; 186 if (so->so_proto->pr_getlock != NULL) 187 mutex_held = (*so->so_proto->pr_getlock)(so, 0); 188 else 189 mutex_held = so->so_proto->pr_domain->dom_mtx; 190 lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); 191 192 if (rp == 0) 193 return EINVAL; 194 raw_disconnect(rp); 195 sofree(so); 196 soisdisconnected(so); 197 return 0; 198} 199 200/* pru_accept is EOPNOTSUPP */ 201 202static int 203raw_uattach(struct socket *so, int proto, __unused struct proc *p) 204{ 205 struct rawcb *rp = sotorawcb(so); 206 207 if (rp == 0) 208 return EINVAL; 209 if ((so->so_state & SS_PRIV) == 0) 210 return (EPERM); 211 return raw_attach(so, proto); 212} 213 214static int 215raw_ubind(__unused struct socket *so, __unused struct sockaddr *nam, __unused struct proc *p) 216{ 217 return EINVAL; 218} 219 220static int 221raw_uconnect(__unused struct socket *so, __unused struct sockaddr *nam, __unused struct proc *p) 222{ 223 return EINVAL; 224} 225 226/* pru_connect2 is EOPNOTSUPP */ 227/* pru_control is EOPNOTSUPP */ 228 229static int 230raw_udetach(struct socket *so) 231{ 232 struct rawcb *rp = sotorawcb(so); 233 234 lck_mtx_t * mutex_held; 235 if (so->so_proto->pr_getlock != NULL) 236 mutex_held = (*so->so_proto->pr_getlock)(so, 0); 237 else 238 mutex_held = so->so_proto->pr_domain->dom_mtx; 239 lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); 240 if (rp == 0) 241 return EINVAL; 242 243 raw_detach(rp); 244 return 0; 245} 246 247static int 248raw_udisconnect(struct socket *so) 249{ 250 struct rawcb *rp = sotorawcb(so); 251 252 if (rp == 0) 253 return EINVAL; 254 if (rp->rcb_faddr == 0) { 255 return ENOTCONN; 256 } 257 raw_disconnect(rp); 258 soisdisconnected(so); 259 return 0; 260} 261 262/* pru_listen is EOPNOTSUPP */ 263 264static int 265raw_upeeraddr(struct socket *so, struct sockaddr **nam) 266{ 267 struct rawcb *rp = sotorawcb(so); 268 269 if (rp == 0) 270 return EINVAL; 271 if (rp->rcb_faddr == 0) { 272 return ENOTCONN; 273 } 274 *nam = dup_sockaddr(rp->rcb_faddr, 1); 275 return 0; 276} 277 278/* pru_rcvd is EOPNOTSUPP */ 279/* pru_rcvoob is EOPNOTSUPP */ 280 281static int 282raw_usend(struct socket *so, int flags, struct mbuf *m, 283 struct sockaddr *nam, struct mbuf *control, __unused struct proc *p) 284{ 285 int error; 286 struct rawcb *rp = sotorawcb(so); 287 288 lck_mtx_t * mutex_held; 289 if (so->so_proto->pr_getlock != NULL) 290 mutex_held = (*so->so_proto->pr_getlock)(so, 0); 291 else 292 mutex_held = so->so_proto->pr_domain->dom_mtx; 293 lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); 294 295 if (rp == 0) { 296 error = EINVAL; 297 goto release; 298 } 299 300 if (flags & PRUS_OOB) { 301 error = EOPNOTSUPP; 302 goto release; 303 } 304 305 if (so->so_proto->pr_output == NULL) { 306 error = EOPNOTSUPP; 307 goto release; 308 } 309 310 if (control && control->m_len) { 311 error = EOPNOTSUPP; 312 goto release; 313 } 314 if (nam) { 315 if (rp->rcb_faddr) { 316 error = EISCONN; 317 goto release; 318 } 319 rp->rcb_faddr = nam; 320 } else if (rp->rcb_faddr == 0) { 321 error = ENOTCONN; 322 goto release; 323 } 324 error = (*so->so_proto->pr_output)(m, so); 325 m = NULL; 326 if (nam) 327 rp->rcb_faddr = NULL; 328release: 329 if (m != NULL) 330 m_freem(m); 331 return (error); 332} 333 334/* pru_sense is null */ 335 336static int 337raw_ushutdown(struct socket *so) 338{ 339 struct rawcb *rp = sotorawcb(so); 340 lck_mtx_t * mutex_held; 341 if (so->so_proto->pr_getlock != NULL) 342 mutex_held = (*so->so_proto->pr_getlock)(so, 0); 343 else 344 mutex_held = so->so_proto->pr_domain->dom_mtx; 345 lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); 346 347 if (rp == 0) 348 return EINVAL; 349 socantsendmore(so); 350 return 0; 351} 352 353static int 354raw_usockaddr(struct socket *so, struct sockaddr **nam) 355{ 356 struct rawcb *rp = sotorawcb(so); 357 358 if (rp == 0) 359 return EINVAL; 360 if (rp->rcb_laddr == 0) 361 return EINVAL; 362 *nam = dup_sockaddr(rp->rcb_laddr, 1); 363 return 0; 364} 365 366struct pr_usrreqs raw_usrreqs = { 367 raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect, 368 pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 369 raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp, 370 pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown, 371 raw_usockaddr, sosend, soreceive, pru_sopoll_notsupp 372}; 373