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 1.7 2004/06/06 19:16:07 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() 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(m0, proto, src, dst) 68 struct mbuf *m0; 69 struct sockproto *proto; 70 struct sockaddr *src, *dst; 71 { 72 struct rawcb *rp; 73 struct mbuf *m = m0; 74 int sockets = 0; 75 struct socket *last; 76 77 last = 0; 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 #define equal(a1, a2) \ 93 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 94 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 95 continue; 96 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 97 continue; 98 if (last) { 99 struct mbuf *n; 100 n = m_copy(m, 0, (int)M_COPYALL); 101 if (n) { 102 if (sbappendaddr(&last->so_rcv, src, 103 n, (struct mbuf *)0) == 0) 104 /* should notify about lost packet */ 105 m_freem(n); 106 else { 107 sorwakeup(last); 108 sockets++; 109 } 110 } 111 } 112 last = rp->rcb_socket; 113 } 114 if (last) { 115 if (sbappendaddr(&last->so_rcv, src, 116 m, (struct mbuf *)0) == 0) 117 m_freem(m); 118 else { 119 sorwakeup(last); 120 sockets++; 121 } 122 } else 123 m_freem(m); 124 } 125 126 /*ARGSUSED*/ 127 void 128 raw_ctlinput(cmd, arg, dummy) 129 int cmd; 130 struct sockaddr *arg; 131 void *dummy; 132 { 133 134 if (cmd < 0 || cmd > PRC_NCMDS) 135 return; 136 /* INCOMPLETE */ 137 } 138 139 static int 140 raw_uabort(struct socket *so) 141 { 142 struct rawcb *rp = sotorawcb(so); 143 144 if (rp == 0) 145 return EINVAL; 146 raw_disconnect(rp); 147 sofree(so); 148 soisdisconnected(so); 149 return 0; 150 } 151 152 /* pru_accept is EOPNOTSUPP */ 153 154 static int 155 raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) 156 { 157 struct rawcb *rp = sotorawcb(so); 158 int error; 159 160 if (rp == 0) 161 return EINVAL; 162 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0) 163 return error; 164 return raw_attach(so, proto, ai->sb_rlimit); 165 } 166 167 static int 168 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 169 { 170 return EINVAL; 171 } 172 173 static int 174 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 175 { 176 return EINVAL; 177 } 178 179 /* pru_connect2 is EOPNOTSUPP */ 180 /* pru_control is EOPNOTSUPP */ 181 182 static int 183 raw_udetach(struct socket *so) 184 { 185 struct rawcb *rp = sotorawcb(so); 186 187 if (rp == 0) 188 return EINVAL; 189 190 raw_detach(rp); 191 return 0; 192 } 193 194 static int 195 raw_udisconnect(struct socket *so) 196 { 197 struct rawcb *rp = sotorawcb(so); 198 199 if (rp == 0) 200 return EINVAL; 201 if (rp->rcb_faddr == 0) { 202 return ENOTCONN; 203 } 204 raw_disconnect(rp); 205 soisdisconnected(so); 206 return 0; 207 } 208 209 /* pru_listen is EOPNOTSUPP */ 210 211 static int 212 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 213 { 214 struct rawcb *rp = sotorawcb(so); 215 216 if (rp == 0) 217 return EINVAL; 218 if (rp->rcb_faddr == 0) { 219 return ENOTCONN; 220 } 221 *nam = dup_sockaddr(rp->rcb_faddr); 222 return 0; 223 } 224 225 /* pru_rcvd is EOPNOTSUPP */ 226 /* pru_rcvoob is EOPNOTSUPP */ 227 228 static int 229 raw_usend(struct socket *so, int flags, struct mbuf *m, 230 struct sockaddr *nam, struct mbuf *control, struct thread *td) 231 { 232 int error; 233 struct rawcb *rp = sotorawcb(so); 234 struct pr_output_info oi; 235 236 if (rp == 0) { 237 error = EINVAL; 238 goto release; 239 } 240 241 if (flags & PRUS_OOB) { 242 error = EOPNOTSUPP; 243 goto release; 244 } 245 246 if (control && control->m_len) { 247 error = EOPNOTSUPP; 248 goto release; 249 } 250 if (nam) { 251 if (rp->rcb_faddr) { 252 error = EISCONN; 253 goto release; 254 } 255 rp->rcb_faddr = nam; 256 } else if (rp->rcb_faddr == 0) { 257 error = ENOTCONN; 258 goto release; 259 } 260 oi.p_pid = td->td_proc->p_pid; 261 error = (*so->so_proto->pr_output)(m, so, &oi); 262 m = NULL; 263 if (nam) 264 rp->rcb_faddr = 0; 265 release: 266 if (m != NULL) 267 m_freem(m); 268 return (error); 269 } 270 271 /* pru_sense is null */ 272 273 static int 274 raw_ushutdown(struct socket *so) 275 { 276 struct rawcb *rp = sotorawcb(so); 277 278 if (rp == 0) 279 return EINVAL; 280 socantsendmore(so); 281 return 0; 282 } 283 284 static int 285 raw_usockaddr(struct socket *so, struct sockaddr **nam) 286 { 287 struct rawcb *rp = sotorawcb(so); 288 289 if (rp == 0) 290 return EINVAL; 291 if (rp->rcb_laddr == 0) 292 return EINVAL; 293 *nam = dup_sockaddr(rp->rcb_laddr); 294 return 0; 295 } 296 297 struct pr_usrreqs raw_usrreqs = { 298 raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect, 299 pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 300 raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp, 301 pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown, 302 raw_usockaddr, sosend, soreceive, sopoll 303 }; 304