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_usrreq.c 8.1 (Berkeley) 6/10/93 30 * $FreeBSD: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/mbuf.h> 36 #include <sys/proc.h> 37 #include <sys/priv.h> 38 #include <sys/protosw.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 42 #include <sys/socketvar2.h> 43 #include <sys/msgport2.h> 44 45 #include <net/raw_cb.h> 46 47 48 static struct lwkt_token raw_token = LWKT_TOKEN_INITIALIZER(raw_token); 49 50 /* 51 * Initialize raw connection block q. 52 */ 53 void 54 raw_init(void) 55 { 56 LIST_INIT(&rawcb_list); 57 } 58 59 /************************************************************************ 60 * RAW PROTOCOL INTERFACE * 61 ************************************************************************/ 62 63 /* 64 * Raw protocol input routine. Find the socket associated with the packet(s) 65 * and move them over. If nothing exists for this packet, drop it. This 66 * routine is indirect called via rts_input() and will be serialized on 67 * cpu 0. 68 * 69 * Most other raw protocol interface functions are also serialized XXX. 70 */ 71 void 72 raw_input(struct mbuf *m0, const struct sockproto *proto, 73 const struct sockaddr *src, const struct sockaddr *dst, 74 const struct rawcb *skip) 75 { 76 struct rawcb *rp; 77 struct mbuf *m = m0; 78 struct socket *last; 79 80 lwkt_gettoken(&raw_token); 81 82 last = NULL; 83 LIST_FOREACH(rp, &rawcb_list, list) { 84 if (rp == skip) 85 continue; 86 if (rp->rcb_proto.sp_family != proto->sp_family) 87 continue; 88 if (rp->rcb_proto.sp_protocol && 89 rp->rcb_proto.sp_protocol != proto->sp_protocol) 90 continue; 91 /* 92 * We assume the lower level routines have 93 * placed the address in a canonical format 94 * suitable for a structure comparison. 95 * 96 * Note that if the lengths are not the same 97 * the comparison will fail at the first byte. 98 */ 99 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) 100 continue; 101 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) 102 continue; 103 if (last) { 104 struct mbuf *n; 105 106 n = m_copypacket(m, M_NOWAIT); 107 if (n != NULL) { 108 lwkt_gettoken(&last->so_rcv.ssb_token); 109 if (ssb_appendaddr(&last->so_rcv, src, n, 110 NULL) == 0) { 111 /* should notify about lost packet */ 112 m_freem(n); 113 } else { 114 sorwakeup(last); 115 } 116 lwkt_reltoken(&last->so_rcv.ssb_token); 117 } 118 } 119 last = rp->rcb_socket; 120 } 121 if (last) { 122 lwkt_gettoken(&last->so_rcv.ssb_token); 123 if (ssb_appendaddr(&last->so_rcv, src, m, NULL) == 0) 124 m_freem(m); 125 else 126 sorwakeup(last); 127 lwkt_reltoken(&last->so_rcv.ssb_token); 128 } else { 129 m_freem(m); 130 } 131 lwkt_reltoken(&raw_token); 132 } 133 134 /* 135 * nm_cmd, nm_arg, nm_extra 136 */ 137 void 138 raw_ctlinput(netmsg_t msg) 139 { 140 int error = 0; 141 142 if (msg->ctlinput.nm_cmd < 0 || msg->ctlinput.nm_cmd > PRC_NCMDS) 143 ; 144 lwkt_replymsg(&msg->lmsg, error); 145 } 146 147 /* 148 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 149 * will sofree() it when we return. 150 */ 151 static void 152 raw_uabort(netmsg_t msg) 153 { 154 struct rawcb *rp = sotorawcb(msg->base.nm_so); 155 int error; 156 157 if (rp) { 158 raw_disconnect(rp); 159 soisdisconnected(msg->base.nm_so); 160 error = 0; 161 } else { 162 error = EINVAL; 163 } 164 lwkt_replymsg(&msg->lmsg, error); 165 } 166 167 /* pru_accept is EOPNOTSUPP */ 168 169 static void 170 raw_uattach(netmsg_t msg) 171 { 172 struct socket *so = msg->base.nm_so; 173 int proto = msg->attach.nm_proto; 174 struct pru_attach_info *ai = msg->attach.nm_ai; 175 struct rawcb *rp; 176 int error; 177 178 rp = sotorawcb(so); 179 if (rp) { 180 error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY); 181 if (error == 0) 182 error = raw_attach(so, proto, ai->sb_rlimit); 183 } else { 184 error = EINVAL; 185 } 186 lwkt_replymsg(&msg->lmsg, error); 187 } 188 189 static void 190 raw_ubind(netmsg_t msg) 191 { 192 lwkt_replymsg(&msg->lmsg, EINVAL); 193 } 194 195 static void 196 raw_uconnect(netmsg_t msg) 197 { 198 lwkt_replymsg(&msg->lmsg, EINVAL); 199 } 200 201 /* pru_connect2 is EOPNOTSUPP */ 202 /* pru_control is EOPNOTSUPP */ 203 204 static void 205 raw_udetach(netmsg_t msg) 206 { 207 struct rawcb *rp = sotorawcb(msg->base.nm_so); 208 int error; 209 210 if (rp) { 211 raw_detach(rp); 212 error = 0; 213 } else { 214 error = EINVAL; 215 } 216 lwkt_replymsg(&msg->lmsg, error); 217 } 218 219 static void 220 raw_udisconnect(netmsg_t msg) 221 { 222 struct socket *so = msg->base.nm_so; 223 struct rawcb *rp; 224 int error; 225 226 rp = sotorawcb(so); 227 if (rp == NULL) { 228 error = EINVAL; 229 } else if (rp->rcb_faddr == NULL) { 230 error = ENOTCONN; 231 } else { 232 soreference(so); 233 raw_disconnect(rp); 234 soisdisconnected(so); 235 sofree(so); 236 error = 0; 237 } 238 lwkt_replymsg(&msg->lmsg, error); 239 } 240 241 /* pru_listen is EOPNOTSUPP */ 242 243 static void 244 raw_upeeraddr(netmsg_t msg) 245 { 246 struct rawcb *rp = sotorawcb(msg->base.nm_so); 247 int error; 248 249 if (rp == NULL) { 250 error = EINVAL; 251 } else if (rp->rcb_faddr == NULL) { 252 error = ENOTCONN; 253 } else { 254 *msg->peeraddr.nm_nam = dup_sockaddr(rp->rcb_faddr); 255 error = 0; 256 } 257 lwkt_replymsg(&msg->lmsg, error); 258 } 259 260 /* pru_rcvd is EOPNOTSUPP */ 261 /* pru_rcvoob is EOPNOTSUPP */ 262 263 static void 264 raw_usend(netmsg_t msg) 265 { 266 struct socket *so = msg->base.nm_so; 267 struct mbuf *m = msg->send.nm_m; 268 struct mbuf *control = msg->send.nm_control; 269 struct rawcb *rp = sotorawcb(so); 270 struct pr_output_info oi; 271 int flags = msg->send.nm_flags; 272 int error; 273 274 if (rp == NULL) { 275 error = EINVAL; 276 goto release; 277 } 278 279 if (flags & PRUS_OOB) { 280 error = EOPNOTSUPP; 281 goto release; 282 } 283 284 if (control && control->m_len) { 285 error = EOPNOTSUPP; 286 goto release; 287 } 288 if (msg->send.nm_addr) { 289 if (rp->rcb_faddr) { 290 error = EISCONN; 291 goto release; 292 } 293 rp->rcb_faddr = msg->send.nm_addr; 294 } else if (rp->rcb_faddr == NULL) { 295 error = ENOTCONN; 296 goto release; 297 } 298 oi.p_pid = msg->send.nm_td->td_proc->p_pid; 299 error = (*so->so_proto->pr_output)(m, so, &oi); 300 m = NULL; 301 if (msg->send.nm_addr) 302 rp->rcb_faddr = NULL; 303 release: 304 if (m != NULL) 305 m_freem(m); 306 lwkt_replymsg(&msg->lmsg, error); 307 } 308 309 /* pru_sense is null */ 310 311 static void 312 raw_ushutdown(netmsg_t msg) 313 { 314 struct rawcb *rp = sotorawcb(msg->base.nm_so); 315 int error; 316 317 if (rp) { 318 socantsendmore(msg->base.nm_so); 319 error = 0; 320 } else { 321 error = EINVAL; 322 } 323 lwkt_replymsg(&msg->lmsg, error); 324 } 325 326 static void 327 raw_usockaddr(netmsg_t msg) 328 { 329 struct rawcb *rp = sotorawcb(msg->base.nm_so); 330 int error; 331 332 if (rp == NULL) { 333 error = EINVAL; 334 } else if (rp->rcb_laddr == NULL) { 335 error = EINVAL; 336 } else { 337 *msg->sockaddr.nm_nam = dup_sockaddr(rp->rcb_laddr); 338 error = 0; 339 } 340 lwkt_replymsg(&msg->lmsg, error); 341 } 342 343 struct pr_usrreqs raw_usrreqs = { 344 .pru_abort = raw_uabort, 345 .pru_accept = pr_generic_notsupp, 346 .pru_attach = raw_uattach, 347 .pru_bind = raw_ubind, 348 .pru_connect = raw_uconnect, 349 .pru_connect2 = pr_generic_notsupp, 350 .pru_control = pr_generic_notsupp, 351 .pru_detach = raw_udetach, 352 .pru_disconnect = raw_udisconnect, 353 .pru_listen = pr_generic_notsupp, 354 .pru_peeraddr = raw_upeeraddr, 355 .pru_rcvd = pr_generic_notsupp, 356 .pru_rcvoob = pr_generic_notsupp, 357 .pru_send = raw_usend, 358 .pru_sense = pru_sense_null, 359 .pru_shutdown = raw_ushutdown, 360 .pru_sockaddr = raw_usockaddr, 361 .pru_sosend = sosend, 362 .pru_soreceive = soreceive 363 }; 364