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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 34 * $FreeBSD: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $ 35 * $DragonFly: src/sys/net/raw_usrreq.c,v 1.14 2007/06/24 20:00:00 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/mbuf.h> 41 #include <sys/proc.h> 42 #include <sys/priv.h> 43 #include <sys/protosw.h> 44 #include <sys/socket.h> 45 #include <sys/socketvar.h> 46 47 #include <sys/socketvar2.h> 48 #include <sys/msgport2.h> 49 50 #include <net/raw_cb.h> 51 52 53 static struct lwkt_token raw_token = LWKT_TOKEN_MP_INITIALIZER(raw_token); 54 55 /* 56 * Initialize raw connection block q. 57 */ 58 void 59 raw_init(void) 60 { 61 LIST_INIT(&rawcb_list); 62 } 63 64 /************************************************************************ 65 * RAW PROTOCOL INTERFACE * 66 ************************************************************************/ 67 68 /* 69 * Raw protocol input routine. Find the socket associated with the packet(s) 70 * and move them over. If nothing exists for this packet, drop it. This 71 * routine is indirect called via rts_input() and will be serialized on 72 * cpu 0. 73 * 74 * Most other raw protocol interface functions are also serialized XXX. 75 */ 76 void 77 raw_input(struct mbuf *m0, const struct sockproto *proto, 78 const struct sockaddr *src, const struct sockaddr *dst, 79 const struct rawcb *skip) 80 { 81 struct rawcb *rp; 82 struct mbuf *m = m0; 83 struct socket *last; 84 85 lwkt_gettoken(&raw_token); 86 87 last = NULL; 88 LIST_FOREACH(rp, &rawcb_list, list) { 89 if (rp == skip) 90 continue; 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 /* 97 * We assume the lower level routines have 98 * placed the address in a canonical format 99 * suitable for a structure comparison. 100 * 101 * Note that if the lengths are not the same 102 * the comparison will fail at the first byte. 103 */ 104 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) 105 continue; 106 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) 107 continue; 108 if (last) { 109 struct mbuf *n; 110 111 n = m_copypacket(m, MB_DONTWAIT); 112 if (n != NULL) { 113 lwkt_gettoken(&last->so_rcv.ssb_token); 114 if (ssb_appendaddr(&last->so_rcv, src, n, 115 NULL) == 0) { 116 /* should notify about lost packet */ 117 m_freem(n); 118 } else { 119 sorwakeup(last); 120 } 121 lwkt_reltoken(&last->so_rcv.ssb_token); 122 } 123 } 124 last = rp->rcb_socket; 125 } 126 if (last) { 127 lwkt_gettoken(&last->so_rcv.ssb_token); 128 if (ssb_appendaddr(&last->so_rcv, src, m, NULL) == 0) 129 m_freem(m); 130 else 131 sorwakeup(last); 132 lwkt_reltoken(&last->so_rcv.ssb_token); 133 } else { 134 m_freem(m); 135 } 136 lwkt_reltoken(&raw_token); 137 } 138 139 /* 140 * nm_cmd, nm_arg, nm_extra 141 */ 142 void 143 raw_ctlinput(netmsg_t msg) 144 { 145 int error = 0; 146 147 if (msg->ctlinput.nm_cmd < 0 || msg->ctlinput.nm_cmd > PRC_NCMDS) 148 ; 149 lwkt_replymsg(&msg->lmsg, error); 150 } 151 152 /* 153 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 154 * will sofree() it when we return. 155 */ 156 static void 157 raw_uabort(netmsg_t msg) 158 { 159 struct rawcb *rp = sotorawcb(msg->base.nm_so); 160 int error; 161 162 if (rp) { 163 raw_disconnect(rp); 164 soisdisconnected(msg->base.nm_so); 165 error = 0; 166 } else { 167 error = EINVAL; 168 } 169 lwkt_replymsg(&msg->lmsg, error); 170 } 171 172 /* pru_accept is EOPNOTSUPP */ 173 174 static void 175 raw_uattach(netmsg_t msg) 176 { 177 struct socket *so = msg->base.nm_so; 178 int proto = msg->attach.nm_proto; 179 struct pru_attach_info *ai = msg->attach.nm_ai; 180 struct rawcb *rp; 181 int error; 182 183 rp = sotorawcb(so); 184 if (rp) { 185 error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY); 186 if (error == 0) 187 error = raw_attach(so, proto, ai->sb_rlimit); 188 } else { 189 error = EINVAL; 190 } 191 lwkt_replymsg(&msg->lmsg, error); 192 } 193 194 static void 195 raw_ubind(netmsg_t msg) 196 { 197 lwkt_replymsg(&msg->lmsg, EINVAL); 198 } 199 200 static void 201 raw_uconnect(netmsg_t msg) 202 { 203 lwkt_replymsg(&msg->lmsg, EINVAL); 204 } 205 206 /* pru_connect2 is EOPNOTSUPP */ 207 /* pru_control is EOPNOTSUPP */ 208 209 static void 210 raw_udetach(netmsg_t msg) 211 { 212 struct rawcb *rp = sotorawcb(msg->base.nm_so); 213 int error; 214 215 if (rp) { 216 raw_detach(rp); 217 error = 0; 218 } else { 219 error = EINVAL; 220 } 221 lwkt_replymsg(&msg->lmsg, error); 222 } 223 224 static void 225 raw_udisconnect(netmsg_t msg) 226 { 227 struct socket *so = msg->base.nm_so; 228 struct rawcb *rp; 229 int error; 230 231 rp = sotorawcb(so); 232 if (rp == NULL) { 233 error = EINVAL; 234 } else if (rp->rcb_faddr == NULL) { 235 error = ENOTCONN; 236 } else { 237 soreference(so); 238 raw_disconnect(rp); 239 soisdisconnected(so); 240 sofree(so); 241 error = 0; 242 } 243 lwkt_replymsg(&msg->lmsg, error); 244 } 245 246 /* pru_listen is EOPNOTSUPP */ 247 248 static void 249 raw_upeeraddr(netmsg_t msg) 250 { 251 struct rawcb *rp = sotorawcb(msg->base.nm_so); 252 int error; 253 254 if (rp == NULL) { 255 error = EINVAL; 256 } else if (rp->rcb_faddr == NULL) { 257 error = ENOTCONN; 258 } else { 259 *msg->peeraddr.nm_nam = dup_sockaddr(rp->rcb_faddr); 260 error = 0; 261 } 262 lwkt_replymsg(&msg->lmsg, error); 263 } 264 265 /* pru_rcvd is EOPNOTSUPP */ 266 /* pru_rcvoob is EOPNOTSUPP */ 267 268 static void 269 raw_usend(netmsg_t msg) 270 { 271 struct socket *so = msg->base.nm_so; 272 struct mbuf *m = msg->send.nm_m; 273 struct mbuf *control = msg->send.nm_control; 274 struct rawcb *rp = sotorawcb(so); 275 struct pr_output_info oi; 276 int flags = msg->send.nm_flags; 277 int error; 278 279 if (rp == NULL) { 280 error = EINVAL; 281 goto release; 282 } 283 284 if (flags & PRUS_OOB) { 285 error = EOPNOTSUPP; 286 goto release; 287 } 288 289 if (control && control->m_len) { 290 error = EOPNOTSUPP; 291 goto release; 292 } 293 if (msg->send.nm_addr) { 294 if (rp->rcb_faddr) { 295 error = EISCONN; 296 goto release; 297 } 298 rp->rcb_faddr = msg->send.nm_addr; 299 } else if (rp->rcb_faddr == NULL) { 300 error = ENOTCONN; 301 goto release; 302 } 303 oi.p_pid = msg->send.nm_td->td_proc->p_pid; 304 error = (*so->so_proto->pr_output)(m, so, &oi); 305 m = NULL; 306 if (msg->send.nm_addr) 307 rp->rcb_faddr = NULL; 308 release: 309 if (m != NULL) 310 m_freem(m); 311 lwkt_replymsg(&msg->lmsg, error); 312 } 313 314 /* pru_sense is null */ 315 316 static void 317 raw_ushutdown(netmsg_t msg) 318 { 319 struct rawcb *rp = sotorawcb(msg->base.nm_so); 320 int error; 321 322 if (rp) { 323 socantsendmore(msg->base.nm_so); 324 error = 0; 325 } else { 326 error = EINVAL; 327 } 328 lwkt_replymsg(&msg->lmsg, error); 329 } 330 331 static void 332 raw_usockaddr(netmsg_t msg) 333 { 334 struct rawcb *rp = sotorawcb(msg->base.nm_so); 335 int error; 336 337 if (rp == NULL) { 338 error = EINVAL; 339 } else if (rp->rcb_laddr == NULL) { 340 error = EINVAL; 341 } else { 342 *msg->sockaddr.nm_nam = dup_sockaddr(rp->rcb_laddr); 343 error = 0; 344 } 345 lwkt_replymsg(&msg->lmsg, error); 346 } 347 348 struct pr_usrreqs raw_usrreqs = { 349 .pru_abort = raw_uabort, 350 .pru_accept = pr_generic_notsupp, 351 .pru_attach = raw_uattach, 352 .pru_bind = raw_ubind, 353 .pru_connect = raw_uconnect, 354 .pru_connect2 = pr_generic_notsupp, 355 .pru_control = pr_generic_notsupp, 356 .pru_detach = raw_udetach, 357 .pru_disconnect = raw_udisconnect, 358 .pru_listen = pr_generic_notsupp, 359 .pru_peeraddr = raw_upeeraddr, 360 .pru_rcvd = pr_generic_notsupp, 361 .pru_rcvoob = pr_generic_notsupp, 362 .pru_send = raw_usend, 363 .pru_sense = pru_sense_null, 364 .pru_shutdown = raw_ushutdown, 365 .pru_sockaddr = raw_usockaddr, 366 .pru_sosend = sosend, 367 .pru_soreceive = soreceive 368 }; 369