raw_usrreq.c revision 1.25
1 /* $NetBSD: raw_usrreq.c,v 1.25 2005/12/11 23:05:25 thorpej 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 1.25 2005/12/11 23:05:25 thorpej 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(void) 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(int cmd, struct sockaddr *arg, void *d) 140 { 141 142 if ((unsigned)cmd >= PRC_NCMDS) 143 return NULL; 144 return NULL; 145 /* INCOMPLETE */ 146 } 147 148 void 149 raw_setsockaddr(struct rawcb *rp, struct mbuf *nam) 150 { 151 152 nam->m_len = rp->rcb_laddr->sa_len; 153 bcopy(rp->rcb_laddr, mtod(nam, caddr_t), (size_t)nam->m_len); 154 } 155 156 void 157 raw_setpeeraddr(struct rawcb *rp, struct mbuf *nam) 158 { 159 160 nam->m_len = rp->rcb_faddr->sa_len; 161 bcopy(rp->rcb_faddr, mtod(nam, caddr_t), (size_t)nam->m_len); 162 } 163 164 /*ARGSUSED*/ 165 int 166 raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 167 struct mbuf *control, struct lwp *l) 168 { 169 struct rawcb *rp; 170 struct proc *p; 171 int s; 172 int error = 0; 173 174 if (req == PRU_CONTROL) 175 return (EOPNOTSUPP); 176 177 p = l ? l->l_proc : NULL; 178 s = splsoftnet(); 179 rp = sotorawcb(so); 180 #ifdef DIAGNOSTIC 181 if (req != PRU_SEND && req != PRU_SENDOOB && control) 182 panic("raw_usrreq: unexpected control mbuf"); 183 #endif 184 if (rp == 0 && req != PRU_ATTACH) { 185 error = EINVAL; 186 goto release; 187 } 188 189 switch (req) { 190 191 /* 192 * Allocate a raw control block and fill in the 193 * necessary info to allow packets to be routed to 194 * the appropriate raw interface routine. 195 */ 196 case PRU_ATTACH: 197 if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) { 198 error = EACCES; 199 break; 200 } 201 error = raw_attach(so, (int)(long)nam); 202 break; 203 204 /* 205 * Destroy state just before socket deallocation. 206 * Flush data or not depending on the options. 207 */ 208 case PRU_DETACH: 209 raw_detach(rp); 210 break; 211 212 /* 213 * If a socket isn't bound to a single address, 214 * the raw input routine will hand it anything 215 * within that protocol family (assuming there's 216 * nothing else around it should go to). 217 */ 218 case PRU_BIND: 219 case PRU_LISTEN: 220 case PRU_CONNECT: 221 case PRU_CONNECT2: 222 error = EOPNOTSUPP; 223 break; 224 225 case PRU_DISCONNECT: 226 soisdisconnected(so); 227 raw_disconnect(rp); 228 break; 229 230 /* 231 * Mark the connection as being incapable of further input. 232 */ 233 case PRU_SHUTDOWN: 234 socantsendmore(so); 235 break; 236 237 case PRU_RCVD: 238 error = EOPNOTSUPP; 239 break; 240 241 /* 242 * Ship a packet out. The appropriate raw output 243 * routine handles any massaging necessary. 244 */ 245 case PRU_SEND: 246 if (control && control->m_len) { 247 m_freem(control); 248 m_freem(m); 249 error = EINVAL; 250 break; 251 } 252 if (nam) { 253 if ((so->so_state & SS_ISCONNECTED) != 0) { 254 error = EISCONN; 255 goto die; 256 } 257 error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT, 258 (struct mbuf *)0, nam, (struct mbuf *)0, l); 259 if (error) { 260 die: 261 m_freem(m); 262 break; 263 } 264 } else { 265 if ((so->so_state & SS_ISCONNECTED) == 0) { 266 error = ENOTCONN; 267 goto die; 268 } 269 } 270 error = (*so->so_proto->pr_output)(m, so); 271 if (nam) 272 raw_disconnect(rp); 273 break; 274 275 case PRU_SENSE: 276 /* 277 * stat: don't bother with a blocksize. 278 */ 279 return (0); 280 281 /* 282 * Not supported. 283 */ 284 case PRU_RCVOOB: 285 error = EOPNOTSUPP; 286 break; 287 288 case PRU_SENDOOB: 289 m_freem(control); 290 m_freem(m); 291 error = EOPNOTSUPP; 292 break; 293 294 case PRU_SOCKADDR: 295 if (rp->rcb_laddr == 0) { 296 error = EINVAL; 297 break; 298 } 299 raw_setsockaddr(rp, nam); 300 break; 301 302 case PRU_PEERADDR: 303 if (rp->rcb_faddr == 0) { 304 error = ENOTCONN; 305 break; 306 } 307 raw_setpeeraddr(rp, nam); 308 break; 309 310 default: 311 panic("raw_usrreq"); 312 } 313 314 release: 315 splx(s); 316 return (error); 317 } 318
Indexes created Mon Sep 22 21:09:42 GMT 2025