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 <net/raw_cb.h> 48 49 /* 50 * Initialize raw connection block q. 51 */ 52 void 53 raw_init(void) 54 { 55 LIST_INIT(&rawcb_list); 56 } 57 58 /************************************************************************ 59 * RAW PROTOCOL INTERFACE * 60 ************************************************************************/ 61 62 /* 63 * Raw protocol input routine. Find the socket associated with the packet(s) 64 * and move them over. If nothing exists for this packet, drop it. This 65 * routine is indirect called via rts_input() and will be serialized on 66 * cpu 0. 67 * 68 * Most other raw protocol interface functions are also serialized XXX. 69 */ 70 void 71 raw_input(struct mbuf *m0, const struct sockproto *proto, 72 const struct sockaddr *src, const struct sockaddr *dst, 73 const struct rawcb *skip) 74 { 75 struct rawcb *rp; 76 struct mbuf *m = m0; 77 struct socket *last; 78 79 last = NULL; 80 LIST_FOREACH(rp, &rawcb_list, list) { 81 if (rp == skip) 82 continue; 83 if (rp->rcb_proto.sp_family != proto->sp_family) 84 continue; 85 if (rp->rcb_proto.sp_protocol && 86 rp->rcb_proto.sp_protocol != proto->sp_protocol) 87 continue; 88 /* 89 * We assume the lower level routines have 90 * placed the address in a canonical format 91 * suitable for a structure comparison. 92 * 93 * Note that if the lengths are not the same 94 * the comparison will fail at the first byte. 95 */ 96 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) 97 continue; 98 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) 99 continue; 100 if (last) { 101 struct mbuf *n; 102 103 n = m_copypacket(m, MB_DONTWAIT); 104 if (n != NULL) { 105 if (ssb_appendaddr(&last->so_rcv, src, n, 106 NULL) == 0) { 107 /* should notify about lost packet */ 108 m_freem(n); 109 } else { 110 sorwakeup(last); 111 } 112 } 113 } 114 last = rp->rcb_socket; 115 } 116 if (last) { 117 if (ssb_appendaddr(&last->so_rcv, src, m, NULL) == 0) 118 m_freem(m); 119 else 120 sorwakeup(last); 121 } else { 122 m_freem(m); 123 } 124 } 125 126 /*ARGSUSED*/ 127 void 128 raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) 129 { 130 131 if (cmd < 0 || cmd > PRC_NCMDS) 132 return; 133 /* INCOMPLETE */ 134 } 135 136 static int 137 raw_uabort(struct socket *so) 138 { 139 struct rawcb *rp = sotorawcb(so); 140 141 if (rp == NULL) 142 return EINVAL; 143 raw_disconnect(rp); 144 sofree(so); 145 soisdisconnected(so); 146 return 0; 147 } 148 149 /* pru_accept is EOPNOTSUPP */ 150 151 static int 152 raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) 153 { 154 struct rawcb *rp = sotorawcb(so); 155 int error; 156 157 if (rp == NULL) 158 return EINVAL; 159 if ((error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY)) != 0) 160 return error; 161 return raw_attach(so, proto, ai->sb_rlimit); 162 } 163 164 static int 165 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 166 { 167 return EINVAL; 168 } 169 170 static int 171 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 172 { 173 return EINVAL; 174 } 175 176 /* pru_connect2 is EOPNOTSUPP */ 177 /* pru_control is EOPNOTSUPP */ 178 179 static int 180 raw_udetach(struct socket *so) 181 { 182 struct rawcb *rp = sotorawcb(so); 183 184 if (rp == NULL) 185 return EINVAL; 186 187 raw_detach(rp); 188 return 0; 189 } 190 191 static int 192 raw_udisconnect(struct socket *so) 193 { 194 struct rawcb *rp = sotorawcb(so); 195 196 if (rp == NULL) 197 return EINVAL; 198 if (rp->rcb_faddr == NULL) { 199 return ENOTCONN; 200 } 201 raw_disconnect(rp); 202 soisdisconnected(so); 203 return 0; 204 } 205 206 /* pru_listen is EOPNOTSUPP */ 207 208 static int 209 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 210 { 211 struct rawcb *rp = sotorawcb(so); 212 213 if (rp == NULL) 214 return EINVAL; 215 if (rp->rcb_faddr == NULL) { 216 return ENOTCONN; 217 } 218 *nam = dup_sockaddr(rp->rcb_faddr); 219 return 0; 220 } 221 222 /* pru_rcvd is EOPNOTSUPP */ 223 /* pru_rcvoob is EOPNOTSUPP */ 224 225 static int 226 raw_usend(struct socket *so, int flags, struct mbuf *m, 227 struct sockaddr *nam, struct mbuf *control, struct thread *td) 228 { 229 int error; 230 struct rawcb *rp = sotorawcb(so); 231 struct pr_output_info oi; 232 233 if (rp == NULL) { 234 error = EINVAL; 235 goto release; 236 } 237 238 if (flags & PRUS_OOB) { 239 error = EOPNOTSUPP; 240 goto release; 241 } 242 243 if (control && control->m_len) { 244 error = EOPNOTSUPP; 245 goto release; 246 } 247 if (nam) { 248 if (rp->rcb_faddr) { 249 error = EISCONN; 250 goto release; 251 } 252 rp->rcb_faddr = nam; 253 } else if (rp->rcb_faddr == NULL) { 254 error = ENOTCONN; 255 goto release; 256 } 257 oi.p_pid = td->td_proc->p_pid; 258 error = (*so->so_proto->pr_output)(m, so, &oi); 259 m = NULL; 260 if (nam) 261 rp->rcb_faddr = NULL; 262 release: 263 if (m != NULL) 264 m_freem(m); 265 return (error); 266 } 267 268 /* pru_sense is null */ 269 270 static int 271 raw_ushutdown(struct socket *so) 272 { 273 struct rawcb *rp = sotorawcb(so); 274 275 if (rp == NULL) 276 return EINVAL; 277 socantsendmore(so); 278 return 0; 279 } 280 281 static int 282 raw_usockaddr(struct socket *so, struct sockaddr **nam) 283 { 284 struct rawcb *rp = sotorawcb(so); 285 286 if (rp == NULL) 287 return EINVAL; 288 if (rp->rcb_laddr == NULL) 289 return EINVAL; 290 *nam = dup_sockaddr(rp->rcb_laddr); 291 return 0; 292 } 293 294 struct pr_usrreqs raw_usrreqs = { 295 .pru_abort = raw_uabort, 296 .pru_accept = pru_accept_notsupp, 297 .pru_attach = raw_uattach, 298 .pru_bind = raw_ubind, 299 .pru_connect = raw_uconnect, 300 .pru_connect2 = pru_connect2_notsupp, 301 .pru_control = pru_control_notsupp, 302 .pru_detach = raw_udetach, 303 .pru_disconnect = raw_udisconnect, 304 .pru_listen = pru_listen_notsupp, 305 .pru_peeraddr = raw_upeeraddr, 306 .pru_rcvd = pru_rcvd_notsupp, 307 .pru_rcvoob = pru_rcvoob_notsupp, 308 .pru_send = raw_usend, 309 .pru_sense = pru_sense_null, 310 .pru_shutdown = raw_ushutdown, 311 .pru_sockaddr = raw_usockaddr, 312 .pru_sosend = sosend, 313 .pru_soreceive = soreceive, 314 .pru_sopoll = sopoll 315 }; 316 317