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 1.11 2006/01/14 11:05:17 swildner 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 /* 59 * Raw protocol input routine. Find the socket 60 * associated with the packet(s) and move them over. If 61 * nothing exists for this packet, drop it. 62 */ 63 /* 64 * Raw protocol interface. 65 */ 66 void 67 raw_input(struct mbuf *m0, struct sockproto *proto, const struct sockaddr *src, 68 const struct sockaddr *dst) 69 { 70 struct rawcb *rp; 71 struct mbuf *m = m0; 72 struct socket *last; 73 74 last = NULL; 75 LIST_FOREACH(rp, &rawcb_list, list) { 76 if (rp->rcb_proto.sp_family != proto->sp_family) 77 continue; 78 if (rp->rcb_proto.sp_protocol && 79 rp->rcb_proto.sp_protocol != proto->sp_protocol) 80 continue; 81 /* 82 * We assume the lower level routines have 83 * placed the address in a canonical format 84 * suitable for a structure comparison. 85 * 86 * Note that if the lengths are not the same 87 * the comparison will fail at the first byte. 88 */ 89 if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) 90 continue; 91 if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) 92 continue; 93 if (last) { 94 struct mbuf *n; 95 96 n = m_copypacket(m, MB_DONTWAIT); 97 if (n != NULL) { 98 if (sbappendaddr(&last->so_rcv, src, n, 99 (struct mbuf *)0) == 0) { 100 /* should notify about lost packet */ 101 m_freem(n); 102 } else { 103 sorwakeup(last); 104 } 105 } 106 } 107 last = rp->rcb_socket; 108 } 109 if (last) { 110 if (sbappendaddr(&last->so_rcv, src, m, (struct mbuf *)0) == 0) 111 m_freem(m); 112 else 113 sorwakeup(last); 114 } else { 115 m_freem(m); 116 } 117 } 118 119 /*ARGSUSED*/ 120 void 121 raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) 122 { 123 124 if (cmd < 0 || cmd > PRC_NCMDS) 125 return; 126 /* INCOMPLETE */ 127 } 128 129 static int 130 raw_uabort(struct socket *so) 131 { 132 struct rawcb *rp = sotorawcb(so); 133 134 if (rp == NULL) 135 return EINVAL; 136 raw_disconnect(rp); 137 sofree(so); 138 soisdisconnected(so); 139 return 0; 140 } 141 142 /* pru_accept is EOPNOTSUPP */ 143 144 static int 145 raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) 146 { 147 struct rawcb *rp = sotorawcb(so); 148 int error; 149 150 if (rp == NULL) 151 return EINVAL; 152 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0) 153 return error; 154 return raw_attach(so, proto, ai->sb_rlimit); 155 } 156 157 static int 158 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 159 { 160 return EINVAL; 161 } 162 163 static int 164 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 165 { 166 return EINVAL; 167 } 168 169 /* pru_connect2 is EOPNOTSUPP */ 170 /* pru_control is EOPNOTSUPP */ 171 172 static int 173 raw_udetach(struct socket *so) 174 { 175 struct rawcb *rp = sotorawcb(so); 176 177 if (rp == NULL) 178 return EINVAL; 179 180 raw_detach(rp); 181 return 0; 182 } 183 184 static int 185 raw_udisconnect(struct socket *so) 186 { 187 struct rawcb *rp = sotorawcb(so); 188 189 if (rp == NULL) 190 return EINVAL; 191 if (rp->rcb_faddr == NULL) { 192 return ENOTCONN; 193 } 194 raw_disconnect(rp); 195 soisdisconnected(so); 196 return 0; 197 } 198 199 /* pru_listen is EOPNOTSUPP */ 200 201 static int 202 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 203 { 204 struct rawcb *rp = sotorawcb(so); 205 206 if (rp == NULL) 207 return EINVAL; 208 if (rp->rcb_faddr == NULL) { 209 return ENOTCONN; 210 } 211 *nam = dup_sockaddr(rp->rcb_faddr); 212 return 0; 213 } 214 215 /* pru_rcvd is EOPNOTSUPP */ 216 /* pru_rcvoob is EOPNOTSUPP */ 217 218 static int 219 raw_usend(struct socket *so, int flags, struct mbuf *m, 220 struct sockaddr *nam, struct mbuf *control, struct thread *td) 221 { 222 int error; 223 struct rawcb *rp = sotorawcb(so); 224 struct pr_output_info oi; 225 226 if (rp == NULL) { 227 error = EINVAL; 228 goto release; 229 } 230 231 if (flags & PRUS_OOB) { 232 error = EOPNOTSUPP; 233 goto release; 234 } 235 236 if (control && control->m_len) { 237 error = EOPNOTSUPP; 238 goto release; 239 } 240 if (nam) { 241 if (rp->rcb_faddr) { 242 error = EISCONN; 243 goto release; 244 } 245 rp->rcb_faddr = nam; 246 } else if (rp->rcb_faddr == NULL) { 247 error = ENOTCONN; 248 goto release; 249 } 250 oi.p_pid = td->td_proc->p_pid; 251 error = (*so->so_proto->pr_output)(m, so, &oi); 252 m = NULL; 253 if (nam) 254 rp->rcb_faddr = NULL; 255 release: 256 if (m != NULL) 257 m_freem(m); 258 return (error); 259 } 260 261 /* pru_sense is null */ 262 263 static int 264 raw_ushutdown(struct socket *so) 265 { 266 struct rawcb *rp = sotorawcb(so); 267 268 if (rp == NULL) 269 return EINVAL; 270 socantsendmore(so); 271 return 0; 272 } 273 274 static int 275 raw_usockaddr(struct socket *so, struct sockaddr **nam) 276 { 277 struct rawcb *rp = sotorawcb(so); 278 279 if (rp == NULL) 280 return EINVAL; 281 if (rp->rcb_laddr == NULL) 282 return EINVAL; 283 *nam = dup_sockaddr(rp->rcb_laddr); 284 return 0; 285 } 286 287 struct pr_usrreqs raw_usrreqs = { 288 raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect, 289 pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 290 raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp, 291 pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown, 292 raw_usockaddr, sosend, soreceive, sopoll 293 }; 294