raw_usrreq.c revision 1.24
1 /* $NetBSD: raw_usrreq.c,v 1.24 2005/12/11 12:24:52 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: raw_usrreq.c,v 1.24 2005/12/11 12:24:52 christos Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/mbuf.h> 39 #include <sys/domain.h> 40 #include <sys/protosw.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/errno.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 47 #include <net/if.h> 48 #include <net/route.h> 49 #include <net/netisr.h> 50 #include <net/raw_cb.h> 51 52 #include <machine/stdarg.h> 53 /* 54 * Initialize raw connection block q. 55 */ 56 void 57 raw_init() 58 { 59 60 LIST_INIT(&rawcb); 61 } 62 63 64 /* 65 * Raw protocol input routine. Find the socket 66 * associated with the packet(s) and move them over. If 67 * nothing exists for this packet, drop it. 68 */ 69 /* 70 * Raw protocol interface. 71 */ 72 void 73 raw_input(struct mbuf *m0, ...) 74 { 75 struct rawcb *rp; 76 struct mbuf *m = m0; 77 int sockets = 0; 78 struct socket *last; 79 va_list ap; 80 struct sockproto *proto; 81 struct sockaddr *src, *dst; 82 83 va_start(ap, m0); 84 proto = va_arg(ap, struct sockproto *); 85 src = va_arg(ap, struct sockaddr *); 86 dst = va_arg(ap, struct sockaddr *); 87 va_end(ap); 88 89 last = 0; 90 LIST_FOREACH(rp, &rawcb, rcb_list) { 91 if (rp->rcb_proto.sp_family != proto->sp_family) 92 continue; 93 if (rp->rcb_proto.sp_protocol && 94 rp->rcb_proto.sp_protocol != proto->sp_protocol) 95 continue; 96 /* 97 * We assume the lower level routines have 98 * placed the address in a canonical format 99 * suitable for a structure comparison. 100 * 101 * Note that if the lengths are not the same 102 * the comparison will fail at the first byte. 103 */ 104 #define equal(a1, a2) \ 105 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 106 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 107 continue; 108 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 109 continue; 110 if (last) { 111 struct mbuf *n; 112 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 113 if (sbappendaddr(&last->so_rcv, src, 114 n, (struct mbuf *)0) == 0) 115 /* should notify about lost packet */ 116 m_freem(n); 117 else { 118 sorwakeup(last); 119 sockets++; 120 } 121 } 122 } 123 last = rp->rcb_socket; 124 } 125 if (last) { 126 if (sbappendaddr(&last->so_rcv, src, 127 m, (struct mbuf *)0) == 0) 128 m_freem(m); 129 else { 130 sorwakeup(last); 131 sockets++; 132 } 133 } else 134 m_freem(m); 135 } 136 137 /*ARGSUSED*/ 138 void * 139 raw_ctlinput(cmd, arg, d) 140 int cmd; 141 struct sockaddr *arg; 142 void *d; 143 { 144 145 if ((unsigned)cmd >= PRC_NCMDS) 146 return NULL; 147 return NULL; 148 /* INCOMPLETE */ 149 } 150 151 void 152 raw_setsockaddr(rp, nam) 153 struct rawcb *rp; 154 struct mbuf *nam; 155 { 156 157 nam->m_len = rp->rcb_laddr->sa_len; 158 bcopy(rp->rcb_laddr, mtod(nam, caddr_t), (size_t)nam->m_len); 159 } 160 161 void 162 raw_setpeeraddr(rp, nam) 163 struct rawcb *rp; 164 struct mbuf *nam; 165 { 166 167 nam->m_len = rp->rcb_faddr->sa_len; 168 bcopy(rp->rcb_faddr, mtod(nam, caddr_t), (size_t)nam->m_len); 169 } 170 171 /*ARGSUSED*/ 172 int 173 raw_usrreq(so, req, m, nam, control, l) 174 struct socket *so; 175 int req; 176 struct mbuf *m, *nam, *control; 177 struct lwp *l; 178 { 179 struct rawcb *rp; 180 struct proc *p; 181 int s; 182 int error = 0; 183 184 if (req == PRU_CONTROL) 185 return (EOPNOTSUPP); 186 187 p = l ? l->l_proc : NULL; 188 s = splsoftnet(); 189 rp = sotorawcb(so); 190 #ifdef DIAGNOSTIC 191 if (req != PRU_SEND && req != PRU_SENDOOB && control) 192 panic("raw_usrreq: unexpected control mbuf"); 193 #endif 194 if (rp == 0 && req != PRU_ATTACH) { 195 error = EINVAL; 196 goto release; 197 } 198 199 switch (req) { 200 201 /* 202 * Allocate a raw control block and fill in the 203 * necessary info to allow packets to be routed to 204 * the appropriate raw interface routine. 205 */ 206 case PRU_ATTACH: 207 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) { 208 error = EACCES; 209 break; 210 } 211 error = raw_attach(so, (int)(long)nam); 212 break; 213 214 /* 215 * Destroy state just before socket deallocation. 216 * Flush data or not depending on the options. 217 */ 218 case PRU_DETACH: 219 raw_detach(rp); 220 break; 221 222 /* 223 * If a socket isn't bound to a single address, 224 * the raw input routine will hand it anything 225 * within that protocol family (assuming there's 226 * nothing else around it should go to). 227 */ 228 case PRU_BIND: 229 case PRU_LISTEN: 230 case PRU_CONNECT: 231 case PRU_CONNECT2: 232 error = EOPNOTSUPP; 233 break; 234 235 case PRU_DISCONNECT: 236 soisdisconnected(so); 237 raw_disconnect(rp); 238 break; 239 240 /* 241 * Mark the connection as being incapable of further input. 242 */ 243 case PRU_SHUTDOWN: 244 socantsendmore(so); 245 break; 246 247 case PRU_RCVD: 248 error = EOPNOTSUPP; 249 break; 250 251 /* 252 * Ship a packet out. The appropriate raw output 253 * routine handles any massaging necessary. 254 */ 255 case PRU_SEND: 256 if (control && control->m_len) { 257 m_freem(control); 258 m_freem(m); 259 error = EINVAL; 260 break; 261 } 262 if (nam) { 263 if ((so->so_state & SS_ISCONNECTED) != 0) { 264 error = EISCONN; 265 goto die; 266 } 267 error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT, 268 (struct mbuf *)0, nam, (struct mbuf *)0, l); 269 if (error) { 270 die: 271 m_freem(m); 272 break; 273 } 274 } else { 275 if ((so->so_state & SS_ISCONNECTED) == 0) { 276 error = ENOTCONN; 277 goto die; 278 } 279 } 280 error = (*so->so_proto->pr_output)(m, so); 281 if (nam) 282 raw_disconnect(rp); 283 break; 284 285 case PRU_SENSE: 286 /* 287 * stat: don't bother with a blocksize. 288 */ 289 return (0); 290 291 /* 292 * Not supported. 293 */ 294 case PRU_RCVOOB: 295 error = EOPNOTSUPP; 296 break; 297 298 case PRU_SENDOOB: 299 m_freem(control); 300 m_freem(m); 301 error = EOPNOTSUPP; 302 break; 303 304 case PRU_SOCKADDR: 305 if (rp->rcb_laddr == 0) { 306 error = EINVAL; 307 break; 308 } 309 raw_setsockaddr(rp, nam); 310 break; 311 312 case PRU_PEERADDR: 313 if (rp->rcb_faddr == 0) { 314 error = ENOTCONN; 315 break; 316 } 317 raw_setpeeraddr(rp, nam); 318 break; 319 320 default: 321 panic("raw_usrreq"); 322 } 323 324 release: 325 splx(s); 326 return (error); 327 } 328
Indexes created Tue Sep 23 14:10:03 GMT 2025