raw_usrreq.c revision 1.21
1 /* $NetBSD: raw_usrreq.c,v 1.21 2003/09/30 00:01:18 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 1.21 2003/09/30 00:01:18 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 #if __STDC__ 74 raw_input(struct mbuf *m0, ...) 75 #else 76 raw_input(m0, va_alist) 77 struct mbuf *m0; 78 va_dcl 79 #endif 80 { 81 struct rawcb *rp; 82 struct mbuf *m = m0; 83 int sockets = 0; 84 struct socket *last; 85 va_list ap; 86 struct sockproto *proto; 87 struct sockaddr *src, *dst; 88 89 va_start(ap, m0); 90 proto = va_arg(ap, struct sockproto *); 91 src = va_arg(ap, struct sockaddr *); 92 dst = va_arg(ap, struct sockaddr *); 93 va_end(ap); 94 95 last = 0; 96 LIST_FOREACH(rp, &rawcb, rcb_list) { 97 if (rp->rcb_proto.sp_family != proto->sp_family) 98 continue; 99 if (rp->rcb_proto.sp_protocol && 100 rp->rcb_proto.sp_protocol != proto->sp_protocol) 101 continue; 102 /* 103 * We assume the lower level routines have 104 * placed the address in a canonical format 105 * suitable for a structure comparison. 106 * 107 * Note that if the lengths are not the same 108 * the comparison will fail at the first byte. 109 */ 110 #define equal(a1, a2) \ 111 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 112 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 113 continue; 114 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 115 continue; 116 if (last) { 117 struct mbuf *n; 118 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 119 if (sbappendaddr(&last->so_rcv, src, 120 n, (struct mbuf *)0) == 0) 121 /* should notify about lost packet */ 122 m_freem(n); 123 else { 124 sorwakeup(last); 125 sockets++; 126 } 127 } 128 } 129 last = rp->rcb_socket; 130 } 131 if (last) { 132 if (sbappendaddr(&last->so_rcv, src, 133 m, (struct mbuf *)0) == 0) 134 m_freem(m); 135 else { 136 sorwakeup(last); 137 sockets++; 138 } 139 } else 140 m_freem(m); 141 } 142 143 /*ARGSUSED*/ 144 void * 145 raw_ctlinput(cmd, arg, d) 146 int cmd; 147 struct sockaddr *arg; 148 void *d; 149 { 150 151 if ((unsigned)cmd >= PRC_NCMDS) 152 return NULL; 153 return NULL; 154 /* INCOMPLETE */ 155 } 156 157 void 158 raw_setsockaddr(rp, nam) 159 struct rawcb *rp; 160 struct mbuf *nam; 161 { 162 163 nam->m_len = rp->rcb_laddr->sa_len; 164 bcopy(rp->rcb_laddr, mtod(nam, caddr_t), (size_t)nam->m_len); 165 } 166 167 void 168 raw_setpeeraddr(rp, nam) 169 struct rawcb *rp; 170 struct mbuf *nam; 171 { 172 173 nam->m_len = rp->rcb_faddr->sa_len; 174 bcopy(rp->rcb_faddr, mtod(nam, caddr_t), (size_t)nam->m_len); 175 } 176 177 /*ARGSUSED*/ 178 int 179 raw_usrreq(so, req, m, nam, control, p) 180 struct socket *so; 181 int req; 182 struct mbuf *m, *nam, *control; 183 struct proc *p; 184 { 185 struct rawcb *rp; 186 int s; 187 int error = 0; 188 189 if (req == PRU_CONTROL) 190 return (EOPNOTSUPP); 191 192 s = splsoftnet(); 193 rp = sotorawcb(so); 194 #ifdef DIAGNOSTIC 195 if (req != PRU_SEND && req != PRU_SENDOOB && control) 196 panic("raw_usrreq: unexpected control mbuf"); 197 #endif 198 if (rp == 0 && req != PRU_ATTACH) { 199 error = EINVAL; 200 goto release; 201 } 202 203 switch (req) { 204 205 /* 206 * Allocate a raw control block and fill in the 207 * necessary info to allow packets to be routed to 208 * the appropriate raw interface routine. 209 */ 210 case PRU_ATTACH: 211 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) { 212 error = EACCES; 213 break; 214 } 215 error = raw_attach(so, (int)(long)nam); 216 break; 217 218 /* 219 * Destroy state just before socket deallocation. 220 * Flush data or not depending on the options. 221 */ 222 case PRU_DETACH: 223 raw_detach(rp); 224 break; 225 226 /* 227 * If a socket isn't bound to a single address, 228 * the raw input routine will hand it anything 229 * within that protocol family (assuming there's 230 * nothing else around it should go to). 231 */ 232 case PRU_BIND: 233 case PRU_LISTEN: 234 case PRU_CONNECT: 235 case PRU_CONNECT2: 236 error = EOPNOTSUPP; 237 break; 238 239 case PRU_DISCONNECT: 240 soisdisconnected(so); 241 raw_disconnect(rp); 242 break; 243 244 /* 245 * Mark the connection as being incapable of further input. 246 */ 247 case PRU_SHUTDOWN: 248 socantsendmore(so); 249 break; 250 251 case PRU_RCVD: 252 error = EOPNOTSUPP; 253 break; 254 255 /* 256 * Ship a packet out. The appropriate raw output 257 * routine handles any massaging necessary. 258 */ 259 case PRU_SEND: 260 if (control && control->m_len) { 261 m_freem(control); 262 m_freem(m); 263 error = EINVAL; 264 break; 265 } 266 if (nam) { 267 if ((so->so_state & SS_ISCONNECTED) != 0) { 268 error = EISCONN; 269 goto die; 270 } 271 error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT, 272 (struct mbuf *)0, nam, (struct mbuf *)0, p); 273 if (error) { 274 die: 275 m_freem(m); 276 break; 277 } 278 } else { 279 if ((so->so_state & SS_ISCONNECTED) == 0) { 280 error = ENOTCONN; 281 goto die; 282 } 283 } 284 error = (*so->so_proto->pr_output)(m, so); 285 if (nam) 286 raw_disconnect(rp); 287 break; 288 289 case PRU_SENSE: 290 /* 291 * stat: don't bother with a blocksize. 292 */ 293 return (0); 294 295 /* 296 * Not supported. 297 */ 298 case PRU_RCVOOB: 299 error = EOPNOTSUPP; 300 break; 301 302 case PRU_SENDOOB: 303 m_freem(control); 304 m_freem(m); 305 error = EOPNOTSUPP; 306 break; 307 308 case PRU_SOCKADDR: 309 if (rp->rcb_laddr == 0) { 310 error = EINVAL; 311 break; 312 } 313 raw_setsockaddr(rp, nam); 314 break; 315 316 case PRU_PEERADDR: 317 if (rp->rcb_faddr == 0) { 318 error = ENOTCONN; 319 break; 320 } 321 raw_setpeeraddr(rp, nam); 322 break; 323 324 default: 325 panic("raw_usrreq"); 326 } 327 328 release: 329 splx(s); 330 return (error); 331 } 332
Indexes created Mon Sep 22 21:09:42 GMT 2025