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, struct sockproto *proto, const struct sockaddr *src, 72 const struct sockaddr *dst) 73 { 74 struct rawcb *rp; 75 struct mbuf *m = m0; 76 struct socket *last; 77 78 last = NULL; 79 LIST_FOREACH(rp, &rawcb_list, list) { 80 if (rp->rcb_proto.sp_family != proto->sp_family) 81 continue; 82 if (rp->rcb_proto.sp_protocol && 83 rp->rcb_proto.sp_protocol != proto->sp_protocol) 84 continue; 85 /* 86 * We assume the lower level routines have 87 * placed the address in a canonical format 88 * suitable for a structure comparison. 89 * 90 * Note that if the lengths are not the same 91 * the comparison will fail at the first byte. 92 */ 93 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) 94 continue; 95 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) 96 continue; 97 if (last) { 98 struct mbuf *n; 99 100 n = m_copypacket(m, MB_DONTWAIT); 101 if (n != NULL) { 102 if (ssb_appendaddr(&last->so_rcv, src, n, 103 (struct mbuf *)0) == 0) { 104 /* should notify about lost packet */ 105 m_freem(n); 106 } else { 107 sorwakeup(last); 108 } 109 } 110 } 111 last = rp->rcb_socket; 112 } 113 if (last) { 114 if (ssb_appendaddr(&last->so_rcv, src, m, (struct mbuf *)0) == 0) 115 m_freem(m); 116 else 117 sorwakeup(last); 118 } else { 119 m_freem(m); 120 } 121 } 122 123 /*ARGSUSED*/ 124 void 125 raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) 126 { 127 128 if (cmd < 0 || cmd > PRC_NCMDS) 129 return; 130 /* INCOMPLETE */ 131 } 132 133 static int 134 raw_uabort(struct socket *so) 135 { 136 struct rawcb *rp = sotorawcb(so); 137 138 if (rp == NULL) 139 return EINVAL; 140 raw_disconnect(rp); 141 sofree(so); 142 soisdisconnected(so); 143 return 0; 144 } 145 146 /* pru_accept is EOPNOTSUPP */ 147 148 static int 149 raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) 150 { 151 struct rawcb *rp = sotorawcb(so); 152 int error; 153 154 if (rp == NULL) 155 return EINVAL; 156 if ((error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY)) != 0) 157 return error; 158 return raw_attach(so, proto, ai->sb_rlimit); 159 } 160 161 static int 162 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 163 { 164 return EINVAL; 165 } 166 167 static int 168 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 169 { 170 return EINVAL; 171 } 172 173 /* pru_connect2 is EOPNOTSUPP */ 174 /* pru_control is EOPNOTSUPP */ 175 176 static int 177 raw_udetach(struct socket *so) 178 { 179 struct rawcb *rp = sotorawcb(so); 180 181 if (rp == NULL) 182 return EINVAL; 183 184 raw_detach(rp); 185 return 0; 186 } 187 188 static int 189 raw_udisconnect(struct socket *so) 190 { 191 struct rawcb *rp = sotorawcb(so); 192 193 if (rp == NULL) 194 return EINVAL; 195 if (rp->rcb_faddr == NULL) { 196 return ENOTCONN; 197 } 198 raw_disconnect(rp); 199 soisdisconnected(so); 200 return 0; 201 } 202 203 /* pru_listen is EOPNOTSUPP */ 204 205 static int 206 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 207 { 208 struct rawcb *rp = sotorawcb(so); 209 210 if (rp == NULL) 211 return EINVAL; 212 if (rp->rcb_faddr == NULL) { 213 return ENOTCONN; 214 } 215 *nam = dup_sockaddr(rp->rcb_faddr); 216 return 0; 217 } 218 219 /* pru_rcvd is EOPNOTSUPP */ 220 /* pru_rcvoob is EOPNOTSUPP */ 221 222 static int 223 raw_usend(struct socket *so, int flags, struct mbuf *m, 224 struct sockaddr *nam, struct mbuf *control, struct thread *td) 225 { 226 int error; 227 struct rawcb *rp = sotorawcb(so); 228 struct pr_output_info oi; 229 230 if (rp == NULL) { 231 error = EINVAL; 232 goto release; 233 } 234 235 if (flags & PRUS_OOB) { 236 error = EOPNOTSUPP; 237 goto release; 238 } 239 240 if (control && control->m_len) { 241 error = EOPNOTSUPP; 242 goto release; 243 } 244 if (nam) { 245 if (rp->rcb_faddr) { 246 error = EISCONN; 247 goto release; 248 } 249 rp->rcb_faddr = nam; 250 } else if (rp->rcb_faddr == NULL) { 251 error = ENOTCONN; 252 goto release; 253 } 254 oi.p_pid = td->td_proc->p_pid; 255 error = (*so->so_proto->pr_output)(m, so, &oi); 256 m = NULL; 257 if (nam) 258 rp->rcb_faddr = NULL; 259 release: 260 if (m != NULL) 261 m_freem(m); 262 return (error); 263 } 264 265 /* pru_sense is null */ 266 267 static int 268 raw_ushutdown(struct socket *so) 269 { 270 struct rawcb *rp = sotorawcb(so); 271 272 if (rp == NULL) 273 return EINVAL; 274 socantsendmore(so); 275 return 0; 276 } 277 278 static int 279 raw_usockaddr(struct socket *so, struct sockaddr **nam) 280 { 281 struct rawcb *rp = sotorawcb(so); 282 283 if (rp == NULL) 284 return EINVAL; 285 if (rp->rcb_laddr == NULL) 286 return EINVAL; 287 *nam = dup_sockaddr(rp->rcb_laddr); 288 return 0; 289 } 290 291 struct pr_usrreqs raw_usrreqs = { 292 .pru_abort = raw_uabort, 293 .pru_accept = pru_accept_notsupp, 294 .pru_attach = raw_uattach, 295 .pru_bind = raw_ubind, 296 .pru_connect = raw_uconnect, 297 .pru_connect2 = pru_connect2_notsupp, 298 .pru_control = pru_control_notsupp, 299 .pru_detach = raw_udetach, 300 .pru_disconnect = raw_udisconnect, 301 .pru_listen = pru_listen_notsupp, 302 .pru_peeraddr = raw_upeeraddr, 303 .pru_rcvd = pru_rcvd_notsupp, 304 .pru_rcvoob = pru_rcvoob_notsupp, 305 .pru_send = raw_usend, 306 .pru_sense = pru_sense_null, 307 .pru_shutdown = raw_ushutdown, 308 .pru_sockaddr = raw_usockaddr, 309 .pru_sosend = sosend, 310 .pru_soreceive = soreceive, 311 .pru_sopoll = sopoll 312 }; 313 314