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/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 46 #include <net/raw_cb.h> 47 48 /* 49 * Initialize raw connection block q. 50 */ 51 void 52 raw_init(void) 53 { 54 LIST_INIT(&rawcb_list); 55 } 56 57 /************************************************************************ 58 * RAW PROTOCOL INTERFACE * 59 ************************************************************************/ 60 61 /* 62 * Raw protocol input routine. Find the socket associated with the packet(s) 63 * and move them over. If nothing exists for this packet, drop it. This 64 * routine is indirect called via rts_input() and will be serialized on 65 * cpu 0. 66 * 67 * Most other raw protocol interface functions are also serialized XXX. 68 */ 69 void 70 raw_input(struct mbuf *m0, struct sockproto *proto, const struct sockaddr *src, 71 const struct sockaddr *dst) 72 { 73 struct rawcb *rp; 74 struct mbuf *m = m0; 75 struct socket *last; 76 77 last = NULL; 78 LIST_FOREACH(rp, &rawcb_list, list) { 79 if (rp->rcb_proto.sp_family != proto->sp_family) 80 continue; 81 if (rp->rcb_proto.sp_protocol && 82 rp->rcb_proto.sp_protocol != proto->sp_protocol) 83 continue; 84 /* 85 * We assume the lower level routines have 86 * placed the address in a canonical format 87 * suitable for a structure comparison. 88 * 89 * Note that if the lengths are not the same 90 * the comparison will fail at the first byte. 91 */ 92 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) 93 continue; 94 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) 95 continue; 96 if (last) { 97 struct mbuf *n; 98 99 n = m_copypacket(m, MB_DONTWAIT); 100 if (n != NULL) { 101 if (ssb_appendaddr(&last->so_rcv, src, n, 102 (struct mbuf *)0) == 0) { 103 /* should notify about lost packet */ 104 m_freem(n); 105 } else { 106 sorwakeup(last); 107 } 108 } 109 } 110 last = rp->rcb_socket; 111 } 112 if (last) { 113 if (ssb_appendaddr(&last->so_rcv, src, m, (struct mbuf *)0) == 0) 114 m_freem(m); 115 else 116 sorwakeup(last); 117 } else { 118 m_freem(m); 119 } 120 } 121 122 /*ARGSUSED*/ 123 void 124 raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) 125 { 126 127 if (cmd < 0 || cmd > PRC_NCMDS) 128 return; 129 /* INCOMPLETE */ 130 } 131 132 static int 133 raw_uabort(struct socket *so) 134 { 135 struct rawcb *rp = sotorawcb(so); 136 137 if (rp == NULL) 138 return EINVAL; 139 raw_disconnect(rp); 140 sofree(so); 141 soisdisconnected(so); 142 return 0; 143 } 144 145 /* pru_accept is EOPNOTSUPP */ 146 147 static int 148 raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) 149 { 150 struct rawcb *rp = sotorawcb(so); 151 int error; 152 153 if (rp == NULL) 154 return EINVAL; 155 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0) 156 return error; 157 return raw_attach(so, proto, ai->sb_rlimit); 158 } 159 160 static int 161 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 162 { 163 return EINVAL; 164 } 165 166 static int 167 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 168 { 169 return EINVAL; 170 } 171 172 /* pru_connect2 is EOPNOTSUPP */ 173 /* pru_control is EOPNOTSUPP */ 174 175 static int 176 raw_udetach(struct socket *so) 177 { 178 struct rawcb *rp = sotorawcb(so); 179 180 if (rp == NULL) 181 return EINVAL; 182 183 raw_detach(rp); 184 return 0; 185 } 186 187 static int 188 raw_udisconnect(struct socket *so) 189 { 190 struct rawcb *rp = sotorawcb(so); 191 192 if (rp == NULL) 193 return EINVAL; 194 if (rp->rcb_faddr == NULL) { 195 return ENOTCONN; 196 } 197 raw_disconnect(rp); 198 soisdisconnected(so); 199 return 0; 200 } 201 202 /* pru_listen is EOPNOTSUPP */ 203 204 static int 205 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 206 { 207 struct rawcb *rp = sotorawcb(so); 208 209 if (rp == NULL) 210 return EINVAL; 211 if (rp->rcb_faddr == NULL) { 212 return ENOTCONN; 213 } 214 *nam = dup_sockaddr(rp->rcb_faddr); 215 return 0; 216 } 217 218 /* pru_rcvd is EOPNOTSUPP */ 219 /* pru_rcvoob is EOPNOTSUPP */ 220 221 static int 222 raw_usend(struct socket *so, int flags, struct mbuf *m, 223 struct sockaddr *nam, struct mbuf *control, struct thread *td) 224 { 225 int error; 226 struct rawcb *rp = sotorawcb(so); 227 struct pr_output_info oi; 228 229 if (rp == NULL) { 230 error = EINVAL; 231 goto release; 232 } 233 234 if (flags & PRUS_OOB) { 235 error = EOPNOTSUPP; 236 goto release; 237 } 238 239 if (control && control->m_len) { 240 error = EOPNOTSUPP; 241 goto release; 242 } 243 if (nam) { 244 if (rp->rcb_faddr) { 245 error = EISCONN; 246 goto release; 247 } 248 rp->rcb_faddr = nam; 249 } else if (rp->rcb_faddr == NULL) { 250 error = ENOTCONN; 251 goto release; 252 } 253 oi.p_pid = td->td_proc->p_pid; 254 error = (*so->so_proto->pr_output)(m, so, &oi); 255 m = NULL; 256 if (nam) 257 rp->rcb_faddr = NULL; 258 release: 259 if (m != NULL) 260 m_freem(m); 261 return (error); 262 } 263 264 /* pru_sense is null */ 265 266 static int 267 raw_ushutdown(struct socket *so) 268 { 269 struct rawcb *rp = sotorawcb(so); 270 271 if (rp == NULL) 272 return EINVAL; 273 socantsendmore(so); 274 return 0; 275 } 276 277 static int 278 raw_usockaddr(struct socket *so, struct sockaddr **nam) 279 { 280 struct rawcb *rp = sotorawcb(so); 281 282 if (rp == NULL) 283 return EINVAL; 284 if (rp->rcb_laddr == NULL) 285 return EINVAL; 286 *nam = dup_sockaddr(rp->rcb_laddr); 287 return 0; 288 } 289 290 struct pr_usrreqs raw_usrreqs = { 291 .pru_abort = raw_uabort, 292 .pru_accept = pru_accept_notsupp, 293 .pru_attach = raw_uattach, 294 .pru_bind = raw_ubind, 295 .pru_connect = raw_uconnect, 296 .pru_connect2 = pru_connect2_notsupp, 297 .pru_control = pru_control_notsupp, 298 .pru_detach = raw_udetach, 299 .pru_disconnect = raw_udisconnect, 300 .pru_listen = pru_listen_notsupp, 301 .pru_peeraddr = raw_upeeraddr, 302 .pru_rcvd = pru_rcvd_notsupp, 303 .pru_rcvoob = pru_rcvoob_notsupp, 304 .pru_send = raw_usend, 305 .pru_sense = pru_sense_null, 306 .pru_shutdown = raw_ushutdown, 307 .pru_sockaddr = raw_usockaddr, 308 .pru_sosend = sosend, 309 .pru_soreceive = soreceive, 310 .pru_sopoll = sopoll 311 }; 312 313