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 1.9 2005/01/06 09:14:13 hsu 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 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) { 101 if (sbappendaddr(&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 sockets++; 108 } 109 } 110 } 111 last = rp->rcb_socket; 112 } 113 if (last) { 114 if (sbappendaddr(&last->so_rcv, src, m, (struct mbuf *)0) == 0) 115 m_freem(m); 116 else { 117 sorwakeup(last); 118 sockets++; 119 } 120 } else 121 m_freem(m); 122 } 123 124 /*ARGSUSED*/ 125 void 126 raw_ctlinput(cmd, arg, dummy) 127 int cmd; 128 struct sockaddr *arg; 129 void *dummy; 130 { 131 132 if (cmd < 0 || cmd > PRC_NCMDS) 133 return; 134 /* INCOMPLETE */ 135 } 136 137 static int 138 raw_uabort(struct socket *so) 139 { 140 struct rawcb *rp = sotorawcb(so); 141 142 if (rp == 0) 143 return EINVAL; 144 raw_disconnect(rp); 145 sofree(so); 146 soisdisconnected(so); 147 return 0; 148 } 149 150 /* pru_accept is EOPNOTSUPP */ 151 152 static int 153 raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) 154 { 155 struct rawcb *rp = sotorawcb(so); 156 int error; 157 158 if (rp == 0) 159 return EINVAL; 160 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0) 161 return error; 162 return raw_attach(so, proto, ai->sb_rlimit); 163 } 164 165 static int 166 raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) 167 { 168 return EINVAL; 169 } 170 171 static int 172 raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) 173 { 174 return EINVAL; 175 } 176 177 /* pru_connect2 is EOPNOTSUPP */ 178 /* pru_control is EOPNOTSUPP */ 179 180 static int 181 raw_udetach(struct socket *so) 182 { 183 struct rawcb *rp = sotorawcb(so); 184 185 if (rp == 0) 186 return EINVAL; 187 188 raw_detach(rp); 189 return 0; 190 } 191 192 static int 193 raw_udisconnect(struct socket *so) 194 { 195 struct rawcb *rp = sotorawcb(so); 196 197 if (rp == 0) 198 return EINVAL; 199 if (rp->rcb_faddr == 0) { 200 return ENOTCONN; 201 } 202 raw_disconnect(rp); 203 soisdisconnected(so); 204 return 0; 205 } 206 207 /* pru_listen is EOPNOTSUPP */ 208 209 static int 210 raw_upeeraddr(struct socket *so, struct sockaddr **nam) 211 { 212 struct rawcb *rp = sotorawcb(so); 213 214 if (rp == 0) 215 return EINVAL; 216 if (rp->rcb_faddr == 0) { 217 return ENOTCONN; 218 } 219 *nam = dup_sockaddr(rp->rcb_faddr); 220 return 0; 221 } 222 223 /* pru_rcvd is EOPNOTSUPP */ 224 /* pru_rcvoob is EOPNOTSUPP */ 225 226 static int 227 raw_usend(struct socket *so, int flags, struct mbuf *m, 228 struct sockaddr *nam, struct mbuf *control, struct thread *td) 229 { 230 int error; 231 struct rawcb *rp = sotorawcb(so); 232 struct pr_output_info oi; 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 oi.p_pid = td->td_proc->p_pid; 259 error = (*so->so_proto->pr_output)(m, so, &oi); 260 m = NULL; 261 if (nam) 262 rp->rcb_faddr = 0; 263 release: 264 if (m != NULL) 265 m_freem(m); 266 return (error); 267 } 268 269 /* pru_sense is null */ 270 271 static int 272 raw_ushutdown(struct socket *so) 273 { 274 struct rawcb *rp = sotorawcb(so); 275 276 if (rp == 0) 277 return EINVAL; 278 socantsendmore(so); 279 return 0; 280 } 281 282 static int 283 raw_usockaddr(struct socket *so, struct sockaddr **nam) 284 { 285 struct rawcb *rp = sotorawcb(so); 286 287 if (rp == 0) 288 return EINVAL; 289 if (rp->rcb_laddr == 0) 290 return EINVAL; 291 *nam = dup_sockaddr(rp->rcb_laddr); 292 return 0; 293 } 294 295 struct pr_usrreqs raw_usrreqs = { 296 raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect, 297 pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 298 raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp, 299 pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown, 300 raw_usockaddr, sosend, soreceive, sopoll 301 }; 302