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 49 #include <net/raw_cb.h> 50 51 52 static struct lwkt_token raw_token = LWKT_TOKEN_MP_INITIALIZER(raw_token); 53 54 /* 55 * Initialize raw connection block q. 56 */ 57 void 58 raw_init(void) 59 { 60 LIST_INIT(&rawcb_list); 61 } 62 63 /************************************************************************ 64 * RAW PROTOCOL INTERFACE * 65 ************************************************************************/ 66 67 /* 68 * Raw protocol input routine. Find the socket associated with the packet(s) 69 * and move them over. If nothing exists for this packet, drop it. This 70 * routine is indirect called via rts_input() and will be serialized on 71 * cpu 0. 72 * 73 * Most other raw protocol interface functions are also serialized XXX. 74 */ 75 void 76 raw_input(struct mbuf *m0, const struct sockproto *proto, 77 const struct sockaddr *src, const struct sockaddr *dst, 78 const struct rawcb *skip) 79 { 80 struct rawcb *rp; 81 struct mbuf *m = m0; 82 struct socket *last; 83 84 lwkt_gettoken(&raw_token); 85 86 last = NULL; 87 LIST_FOREACH(rp, &rawcb_list, list) { 88 if (rp == skip) 89 continue; 90 if (rp->rcb_proto.sp_family != proto->sp_family) 91 continue; 92 if (rp->rcb_proto.sp_protocol && 93 rp->rcb_proto.sp_protocol != proto->sp_protocol) 94 continue; 95 /* 96 * We assume the lower level routines have 97 * placed the address in a canonical format 98 * suitable for a structure comparison. 99 * 100 * Note that if the lengths are not the same 101 * the comparison will fail at the first byte. 102 */ 103 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) 104 continue; 105 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) 106 continue; 107 if (last) { 108 struct mbuf *n; 109 110 n = m_copypacket(m, MB_DONTWAIT); 111 if (n != NULL) { 112 lwkt_gettoken(&last->so_rcv.ssb_token); 113 if (ssb_appendaddr(&last->so_rcv, src, n, 114 NULL) == 0) { 115 /* should notify about lost packet */ 116 m_freem(n); 117 } else { 118 sorwakeup(last); 119 } 120 lwkt_reltoken(&last->so_rcv.ssb_token); 121 } 122 } 123 last = rp->rcb_socket; 124 } 125 if (last) { 126 lwkt_gettoken(&last->so_rcv.ssb_token); 127 if (ssb_appendaddr(&last->so_rcv, src, m, NULL) == 0) 128 m_freem(m); 129 else 130 sorwakeup(last); 131 lwkt_reltoken(&last->so_rcv.ssb_token); 132 } else { 133 m_freem(m); 134 } 135 lwkt_reltoken(&raw_token); 136 } 137 138 /*ARGSUSED*/ 139 void 140 raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) 141 { 142 143 if (cmd < 0 || cmd > PRC_NCMDS) 144 return; 145 /* INCOMPLETE */ 146 } 147 148 /* 149 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 150 * will sofree() it when we return. 151 */ 152 static int 153 raw_uabort(struct socket *so) 154 { 155 struct rawcb *rp = sotorawcb(so); 156 157 if (rp == NULL) 158 return EINVAL; 159 raw_disconnect(rp); 160 soisdisconnected(so); 161 return 0; 162 } 163 164 /* pru_accept is EOPNOTSUPP */ 165 166 static int 167 raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) 168 { 169 struct rawcb *rp = sotorawcb(so); 170 int error; 171 172 if (rp == NULL) 173 return EINVAL; 174 if ((error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY)) != 0) 175 return error; 176 return raw_attach(so, proto, ai->sb_rlimit); 177 } 178 179 static int 180 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 181 { 182 return EINVAL; 183 } 184 185 static int 186 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 187 { 188 return EINVAL; 189 } 190 191 /* pru_connect2 is EOPNOTSUPP */ 192 /* pru_control is EOPNOTSUPP */ 193 194 static int 195 raw_udetach(struct socket *so) 196 { 197 struct rawcb *rp = sotorawcb(so); 198 199 if (rp == NULL) 200 return EINVAL; 201 202 raw_detach(rp); 203 return 0; 204 } 205 206 static int 207 raw_udisconnect(struct socket *so) 208 { 209 struct rawcb *rp = sotorawcb(so); 210 211 if (rp == NULL) 212 return EINVAL; 213 if (rp->rcb_faddr == NULL) { 214 return ENOTCONN; 215 } 216 soreference(so); 217 raw_disconnect(rp); 218 soisdisconnected(so); 219 sofree(so); 220 221 return 0; 222 } 223 224 /* pru_listen is EOPNOTSUPP */ 225 226 static int 227 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 228 { 229 struct rawcb *rp = sotorawcb(so); 230 231 if (rp == NULL) 232 return EINVAL; 233 if (rp->rcb_faddr == NULL) { 234 return ENOTCONN; 235 } 236 *nam = dup_sockaddr(rp->rcb_faddr); 237 return 0; 238 } 239 240 /* pru_rcvd is EOPNOTSUPP */ 241 /* pru_rcvoob is EOPNOTSUPP */ 242 243 static int 244 raw_usend(struct socket *so, int flags, struct mbuf *m, 245 struct sockaddr *nam, struct mbuf *control, struct thread *td) 246 { 247 int error; 248 struct rawcb *rp = sotorawcb(so); 249 struct pr_output_info oi; 250 251 if (rp == NULL) { 252 error = EINVAL; 253 goto release; 254 } 255 256 if (flags & PRUS_OOB) { 257 error = EOPNOTSUPP; 258 goto release; 259 } 260 261 if (control && control->m_len) { 262 error = EOPNOTSUPP; 263 goto release; 264 } 265 if (nam) { 266 if (rp->rcb_faddr) { 267 error = EISCONN; 268 goto release; 269 } 270 rp->rcb_faddr = nam; 271 } else if (rp->rcb_faddr == NULL) { 272 error = ENOTCONN; 273 goto release; 274 } 275 oi.p_pid = td->td_proc->p_pid; 276 error = (*so->so_proto->pr_output)(m, so, &oi); 277 m = NULL; 278 if (nam) 279 rp->rcb_faddr = NULL; 280 release: 281 if (m != NULL) 282 m_freem(m); 283 return (error); 284 } 285 286 /* pru_sense is null */ 287 288 static int 289 raw_ushutdown(struct socket *so) 290 { 291 struct rawcb *rp = sotorawcb(so); 292 293 if (rp == NULL) 294 return EINVAL; 295 socantsendmore(so); 296 return 0; 297 } 298 299 static int 300 raw_usockaddr(struct socket *so, struct sockaddr **nam) 301 { 302 struct rawcb *rp = sotorawcb(so); 303 304 if (rp == NULL) 305 return EINVAL; 306 if (rp->rcb_laddr == NULL) 307 return EINVAL; 308 *nam = dup_sockaddr(rp->rcb_laddr); 309 return 0; 310 } 311 312 struct pr_usrreqs raw_usrreqs = { 313 .pru_abort = raw_uabort, 314 .pru_accept = pru_accept_notsupp, 315 .pru_attach = raw_uattach, 316 .pru_bind = raw_ubind, 317 .pru_connect = raw_uconnect, 318 .pru_connect2 = pru_connect2_notsupp, 319 .pru_control = pru_control_notsupp, 320 .pru_detach = raw_udetach, 321 .pru_disconnect = raw_udisconnect, 322 .pru_listen = pru_listen_notsupp, 323 .pru_peeraddr = raw_upeeraddr, 324 .pru_rcvd = pru_rcvd_notsupp, 325 .pru_rcvoob = pru_rcvoob_notsupp, 326 .pru_send = raw_usend, 327 .pru_sense = pru_sense_null, 328 .pru_shutdown = raw_ushutdown, 329 .pru_sockaddr = raw_usockaddr, 330 .pru_sosend = sosend, 331 .pru_soreceive = soreceive 332 }; 333