raw_usrreq.c revision 28270
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 * $Id: raw_usrreq.c,v 1.13 1997/08/02 14:32:40 bde 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 */ 50void 51raw_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 */ 65void 66raw_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*/ 126void 127raw_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 138static int 139raw_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 153static int 154raw_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->p_ucred, &p->p_acflag)) != 0) 162 return error; 163 return raw_attach(so, proto); 164} 165 166static int 167raw_ubind(struct socket *so, struct sockaddr *nam, struct proc *p) 168{ 169 return EINVAL; 170} 171 172static int 173raw_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 181static int 182raw_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 193static int 194raw_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 210static int 211raw_upeeraddr(struct socket *so, struct sockaddr **nam) 212{ 213 struct rawcb *rp = sotorawcb(so); 214 unsigned len; 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, 1); 222 return 0; 223} 224 225/* pru_rcvd is EOPNOTSUPP */ 226/* pru_rcvoob is EOPNOTSUPP */ 227 228static int 229raw_usend(struct socket *so, int flags, struct mbuf *m, 230 struct sockaddr *nam, struct mbuf *control, struct proc *p) 231{ 232 int error; 233 struct rawcb *rp = sotorawcb(so); 234 235 if (rp == 0) { 236 error = EINVAL; 237 goto release; 238 } 239 240 if (flags & PRUS_OOB) { 241 error = EOPNOTSUPP; 242 goto release; 243 } 244 245 if (control && control->m_len) { 246 error = EOPNOTSUPP; 247 goto release; 248 } 249 if (nam) { 250 if (rp->rcb_faddr) { 251 error = EISCONN; 252 goto release; 253 } 254 rp->rcb_faddr = nam; 255 } else if (rp->rcb_faddr == 0) { 256 error = ENOTCONN; 257 goto release; 258 } 259 error = (*so->so_proto->pr_output)(m, so); 260 m = NULL; 261 if (nam) 262 rp->rcb_faddr = 0; 263release: 264 if (m != NULL) 265 m_freem(m); 266 return (error); 267} 268 269/* pru_sense is null */ 270 271static int 272raw_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 282static int 283raw_usockaddr(struct socket *so, struct sockaddr **nam) 284{ 285 struct rawcb *rp = sotorawcb(so); 286 unsigned len; 287 288 if (rp == 0) 289 return EINVAL; 290 if (rp->rcb_laddr == 0) 291 return EINVAL; 292 *nam = dup_sockaddr(rp->rcb_laddr, 1); 293 return 0; 294} 295 296struct pr_usrreqs raw_usrreqs = { 297 raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect, 298 pru_connect2_notsupp, pru_control_notsupp, raw_udetach, 299 raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp, 300 pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown, 301 raw_usockaddr, sosend, soreceive, soselect 302}; 303