raw_usrreq.c revision 1.26
1 /* $NetBSD: raw_usrreq.c,v 1.26 2006/05/14 21:19:33 elad 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 1.26 2006/05/14 21:19:33 elad 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 #include <sys/kauth.h> 47 48 #include <net/if.h> 49 #include <net/route.h> 50 #include <net/netisr.h> 51 #include <net/raw_cb.h> 52 53 #include <machine/stdarg.h> 54 /* 55 * Initialize raw connection block q. 56 */ 57 void 58 raw_init(void) 59 { 60 61 LIST_INIT(&rawcb); 62 } 63 64 65 /* 66 * Raw protocol input routine. Find the socket 67 * associated with the packet(s) and move them over. If 68 * nothing exists for this packet, drop it. 69 */ 70 /* 71 * Raw protocol interface. 72 */ 73 void 74 raw_input(struct mbuf *m0, ...) 75 { 76 struct rawcb *rp; 77 struct mbuf *m = m0; 78 int sockets = 0; 79 struct socket *last; 80 va_list ap; 81 struct sockproto *proto; 82 struct sockaddr *src, *dst; 83 84 va_start(ap, m0); 85 proto = va_arg(ap, struct sockproto *); 86 src = va_arg(ap, struct sockaddr *); 87 dst = va_arg(ap, struct sockaddr *); 88 va_end(ap); 89 90 last = 0; 91 LIST_FOREACH(rp, &rawcb, rcb_list) { 92 if (rp->rcb_proto.sp_family != proto->sp_family) 93 continue; 94 if (rp->rcb_proto.sp_protocol && 95 rp->rcb_proto.sp_protocol != proto->sp_protocol) 96 continue; 97 /* 98 * We assume the lower level routines have 99 * placed the address in a canonical format 100 * suitable for a structure comparison. 101 * 102 * Note that if the lengths are not the same 103 * the comparison will fail at the first byte. 104 */ 105 #define equal(a1, a2) \ 106 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 107 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 108 continue; 109 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 110 continue; 111 if (last) { 112 struct mbuf *n; 113 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 114 if (sbappendaddr(&last->so_rcv, src, 115 n, (struct mbuf *)0) == 0) 116 /* should notify about lost packet */ 117 m_freem(n); 118 else { 119 sorwakeup(last); 120 sockets++; 121 } 122 } 123 } 124 last = rp->rcb_socket; 125 } 126 if (last) { 127 if (sbappendaddr(&last->so_rcv, src, 128 m, (struct mbuf *)0) == 0) 129 m_freem(m); 130 else { 131 sorwakeup(last); 132 sockets++; 133 } 134 } else 135 m_freem(m); 136 } 137 138 /*ARGSUSED*/ 139 void * 140 raw_ctlinput(int cmd, struct sockaddr *arg, void *d) 141 { 142 143 if ((unsigned)cmd >= PRC_NCMDS) 144 return NULL; 145 return NULL; 146 /* INCOMPLETE */ 147 } 148 149 void 150 raw_setsockaddr(struct rawcb *rp, struct mbuf *nam) 151 { 152 153 nam->m_len = rp->rcb_laddr->sa_len; 154 bcopy(rp->rcb_laddr, mtod(nam, caddr_t), (size_t)nam->m_len); 155 } 156 157 void 158 raw_setpeeraddr(struct rawcb *rp, struct mbuf *nam) 159 { 160 161 nam->m_len = rp->rcb_faddr->sa_len; 162 bcopy(rp->rcb_faddr, mtod(nam, caddr_t), (size_t)nam->m_len); 163 } 164 165 /*ARGSUSED*/ 166 int 167 raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 168 struct mbuf *control, struct lwp *l) 169 { 170 struct rawcb *rp; 171 struct proc *p; 172 int s; 173 int error = 0; 174 175 if (req == PRU_CONTROL) 176 return (EOPNOTSUPP); 177 178 p = l ? l->l_proc : NULL; 179 s = splsoftnet(); 180 rp = sotorawcb(so); 181 #ifdef DIAGNOSTIC 182 if (req != PRU_SEND && req != PRU_SENDOOB && control) 183 panic("raw_usrreq: unexpected control mbuf"); 184 #endif 185 if (rp == 0 && req != PRU_ATTACH) { 186 error = EINVAL; 187 goto release; 188 } 189 190 switch (req) { 191 192 /* 193 * Allocate a raw control block and fill in the 194 * necessary info to allow packets to be routed to 195 * the appropriate raw interface routine. 196 */ 197 case PRU_ATTACH: 198 if (p == 0 || (error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag))) { 199 error = EACCES; 200 break; 201 } 202 error = raw_attach(so, (int)(long)nam); 203 break; 204 205 /* 206 * Destroy state just before socket deallocation. 207 * Flush data or not depending on the options. 208 */ 209 case PRU_DETACH: 210 raw_detach(rp); 211 break; 212 213 /* 214 * If a socket isn't bound to a single address, 215 * the raw input routine will hand it anything 216 * within that protocol family (assuming there's 217 * nothing else around it should go to). 218 */ 219 case PRU_BIND: 220 case PRU_LISTEN: 221 case PRU_CONNECT: 222 case PRU_CONNECT2: 223 error = EOPNOTSUPP; 224 break; 225 226 case PRU_DISCONNECT: 227 soisdisconnected(so); 228 raw_disconnect(rp); 229 break; 230 231 /* 232 * Mark the connection as being incapable of further input. 233 */ 234 case PRU_SHUTDOWN: 235 socantsendmore(so); 236 break; 237 238 case PRU_RCVD: 239 error = EOPNOTSUPP; 240 break; 241 242 /* 243 * Ship a packet out. The appropriate raw output 244 * routine handles any massaging necessary. 245 */ 246 case PRU_SEND: 247 if (control && control->m_len) { 248 m_freem(control); 249 m_freem(m); 250 error = EINVAL; 251 break; 252 } 253 if (nam) { 254 if ((so->so_state & SS_ISCONNECTED) != 0) { 255 error = EISCONN; 256 goto die; 257 } 258 error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT, 259 (struct mbuf *)0, nam, (struct mbuf *)0, l); 260 if (error) { 261 die: 262 m_freem(m); 263 break; 264 } 265 } else { 266 if ((so->so_state & SS_ISCONNECTED) == 0) { 267 error = ENOTCONN; 268 goto die; 269 } 270 } 271 error = (*so->so_proto->pr_output)(m, so); 272 if (nam) 273 raw_disconnect(rp); 274 break; 275 276 case PRU_SENSE: 277 /* 278 * stat: don't bother with a blocksize. 279 */ 280 return (0); 281 282 /* 283 * Not supported. 284 */ 285 case PRU_RCVOOB: 286 error = EOPNOTSUPP; 287 break; 288 289 case PRU_SENDOOB: 290 m_freem(control); 291 m_freem(m); 292 error = EOPNOTSUPP; 293 break; 294 295 case PRU_SOCKADDR: 296 if (rp->rcb_laddr == 0) { 297 error = EINVAL; 298 break; 299 } 300 raw_setsockaddr(rp, nam); 301 break; 302 303 case PRU_PEERADDR: 304 if (rp->rcb_faddr == 0) { 305 error = ENOTCONN; 306 break; 307 } 308 raw_setpeeraddr(rp, nam); 309 break; 310 311 default: 312 panic("raw_usrreq"); 313 } 314 315 release: 316 splx(s); 317 return (error); 318 } 319
Indexes created Tue Sep 23 22:09:46 GMT 2025