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 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/proc.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 45 #include <net/raw_cb.h> 46 47 /* 48 * Initialize raw connection block q. 49 */ 50 void 51 raw_init() 52 { 53 LIST_INIT(&rawcb_list); 54 } 55 56 57 /* 58 * Raw protocol input routine. Find the socket 59 * associated with the packet(s) and move them over. If 60 * nothing exists for this packet, drop it. 61 */ 62 /* 63 * Raw protocol interface. 64 */ 65 void 66 raw_input(m0, proto, src, dst) 67 struct mbuf *m0; 68 register struct sockproto *proto; 69 struct sockaddr *src, *dst; 70 { 71 register struct rawcb *rp; 72 register struct mbuf *m = m0; 73 register int sockets = 0; 74 struct socket *last; 75 76 last = 0; 77 LIST_FOREACH(rp, &rawcb_list, list) { 78 if (rp->rcb_proto.sp_family != proto->sp_family) 79 continue; 80 if (rp->rcb_proto.sp_protocol && 81 rp->rcb_proto.sp_protocol != proto->sp_protocol) 82 continue; 83 /* 84 * We assume the lower level routines have 85 * placed the address in a canonical format 86 * suitable for a structure comparison. 87 * 88 * Note that if the lengths are not the same 89 * the comparison will fail at the first byte. 90 */ 91 #define equal(a1, a2) \ 92 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 93 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 94 continue; 95 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 96 continue; 97 if (last) { 98 struct mbuf *n; 99 n = m_copy(m, 0, (int)M_COPYALL); 100 if (n) { 101 if (sbappendaddr(&last->so_rcv, src, 102 n, (struct mbuf *)0) == 0) 103 /* should notify about lost packet */ 104 m_freem(n); 105 else { 106 sorwakeup(last); 107 sockets++; 108 } 109 } 110 } 111 last = rp->rcb_socket; 112 } 113 if (last) { 114 if (sbappendaddr(&last->so_rcv, src, 115 m, (struct mbuf *)0) == 0) 116 m_freem(m); 117 else { 118 sorwakeup(last); 119 sockets++; 120 } 121 } else 122 m_freem(m); 123 } 124 125 /*ARGSUSED*/ 126 void 127 raw_ctlinput(cmd, arg, dummy) 128 int cmd; 129 struct sockaddr *arg; 130 void *dummy; 131 { 132 133 if (cmd < 0 || cmd > PRC_NCMDS) 134 return; 135 /* INCOMPLETE */ 136 } 137 138 static int 139 raw_uabort(struct socket *so) 140 { 141 struct rawcb *rp = sotorawcb(so); 142 143 if (rp == 0) 144 return EINVAL; 145 raw_disconnect(rp); 146 sofree(so); 147 soisdisconnected(so); 148 return 0; 149 } 150 151 /* pru_accept is EOPNOTSUPP */ 152 153 static int 154 raw_uattach(struct socket *so, int proto, struct proc *p) 155 { 156 struct rawcb *rp = sotorawcb(so); 157 int error; 158 159 if (rp == 0) 160 return EINVAL; 161 if (p && (error = suser(p)) != 0) 162 return error; 163 return raw_attach(so, proto); 164 } 165 166 static int 167 raw_ubind(struct socket *so, struct sockaddr *nam, struct proc *p) 168 { 169 return EINVAL; 170 } 171 172 static int 173 raw_uconnect(struct socket *so, struct sockaddr *nam, struct proc *p) 174 { 175 return EINVAL; 176 } 177 178 /* pru_connect2 is EOPNOTSUPP */ 179 /* pru_control is EOPNOTSUPP */ 180 181 static int 182 raw_udetach(struct socket *so) 183 { 184 struct rawcb *rp = sotorawcb(so); 185 186 if (rp == 0) 187 return EINVAL; 188 189 raw_detach(rp); 190 return 0; 191 } 192 193 static int 194 raw_udisconnect(struct socket *so) 195 { 196 struct rawcb *rp = sotorawcb(so); 197 198 if (rp == 0) 199 return EINVAL; 200 if (rp->rcb_faddr == 0) { 201 return ENOTCONN; 202 } 203 raw_disconnect(rp); 204 soisdisconnected(so); 205 return 0; 206 } 207 208 /* pru_listen is EOPNOTSUPP */ 209 210 static int 211 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 212 { 213 struct rawcb *rp = sotorawcb(so); 214 215 if (rp == 0) 216 return EINVAL; 217 if (rp->rcb_faddr == 0) { 218 return ENOTCONN; 219 } 220 *nam = dup_sockaddr(rp->rcb_faddr, 1); 221 return 0; 222 } 223 224 /* pru_rcvd is EOPNOTSUPP */ 225 /* pru_rcvoob is EOPNOTSUPP */ 226 227 static int 228 raw_usend(struct socket *so, int flags, struct mbuf *m, 229 struct sockaddr *nam, struct mbuf *control, struct proc *p) 230 { 231 int error; 232 struct rawcb *rp = sotorawcb(so); 233 234 if (rp == 0) { 235 error = EINVAL; 236 goto release; 237 } 238 239 if (flags & PRUS_OOB) { 240 error = EOPNOTSUPP; 241 goto release; 242 } 243 244 if (control && control->m_len) { 245 error = EOPNOTSUPP; 246 goto release; 247 } 248 if (nam) { 249 if (rp->rcb_faddr) { 250 error = EISCONN; 251 goto release; 252 } 253 rp->rcb_faddr = nam; 254 } else if (rp->rcb_faddr == 0) { 255 error = ENOTCONN; 256 goto release; 257 } 258 error = (*so->so_proto->pr_output)(m, so); 259 m = NULL; 260 if (nam) 261 rp->rcb_faddr = 0; 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 == 0) 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 == 0) 287 return EINVAL; 288 if (rp->rcb_laddr == 0) 289 return EINVAL; 290 *nam = dup_sockaddr(rp->rcb_laddr, 1); 291 return 0; 292 } 293 294 struct pr_usrreqs raw_usrreqs = { 295 raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect, 296 pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 297 raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp, 298 pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown, 299 raw_usockaddr, sosend, soreceive, sopoll 300 }; 301