raw_usrreq.c revision 1.7
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 * from: @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 34 * $Id: raw_usrreq.c,v 1.7 1994/05/13 06:03:13 mycroft Exp $ 35 */ 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 45 #include <net/if.h> 46 #include <net/route.h> 47 #include <net/netisr.h> 48 #include <net/raw_cb.h> 49 50 /* 51 * Initialize raw connection block q. 52 */ 53 void 54 raw_init() 55 { 56 57 rawcb.rcb_next = rawcb.rcb_prev = &rawcb; 58 } 59 60 61 /* 62 * Raw protocol input routine. Find the socket 63 * associated with the packet(s) and move them over. If 64 * nothing exists for this packet, drop it. 65 */ 66 /* 67 * Raw protocol interface. 68 */ 69 void 70 raw_input(m0, proto, src, dst) 71 struct mbuf *m0; 72 register struct sockproto *proto; 73 struct sockaddr *src, *dst; 74 { 75 register struct rawcb *rp; 76 register struct mbuf *m = m0; 77 register int sockets = 0; 78 struct socket *last; 79 80 last = 0; 81 for (rp = rawcb.rcb_next; rp != &rawcb; rp = rp->rcb_next) { 82 if (rp->rcb_proto.sp_family != proto->sp_family) 83 continue; 84 if (rp->rcb_proto.sp_protocol && 85 rp->rcb_proto.sp_protocol != proto->sp_protocol) 86 continue; 87 /* 88 * We assume the lower level routines have 89 * placed the address in a canonical format 90 * suitable for a structure comparison. 91 * 92 * Note that if the lengths are not the same 93 * the comparison will fail at the first byte. 94 */ 95 #define equal(a1, a2) \ 96 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 97 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 98 continue; 99 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 100 continue; 101 if (last) { 102 struct mbuf *n; 103 if (n = m_copy(m, 0, (int)M_COPYALL)) { 104 if (sbappendaddr(&last->so_rcv, src, 105 n, (struct mbuf *)0) == 0) 106 /* should notify about lost packet */ 107 m_freem(n); 108 else { 109 sorwakeup(last); 110 sockets++; 111 } 112 } 113 } 114 last = rp->rcb_socket; 115 } 116 if (last) { 117 if (sbappendaddr(&last->so_rcv, src, 118 m, (struct mbuf *)0) == 0) 119 m_freem(m); 120 else { 121 sorwakeup(last); 122 sockets++; 123 } 124 } else 125 m_freem(m); 126 } 127 128 /*ARGSUSED*/ 129 void 130 raw_ctlinput(cmd, arg) 131 int cmd; 132 struct sockaddr *arg; 133 { 134 135 if (cmd < 0 || cmd > PRC_NCMDS) 136 return; 137 /* INCOMPLETE */ 138 } 139 140 /*ARGSUSED*/ 141 int 142 raw_usrreq(so, req, m, nam, control) 143 struct socket *so; 144 int req; 145 struct mbuf *m, *nam, *control; 146 { 147 register struct rawcb *rp = sotorawcb(so); 148 register int error = 0; 149 int len; 150 151 if (req == PRU_CONTROL) 152 return (EOPNOTSUPP); 153 if (control && control->m_len) { 154 error = EOPNOTSUPP; 155 goto release; 156 } 157 if (rp == 0) { 158 error = EINVAL; 159 goto release; 160 } 161 switch (req) { 162 163 /* 164 * Allocate a raw control block and fill in the 165 * necessary info to allow packets to be routed to 166 * the appropriate raw interface routine. 167 */ 168 case PRU_ATTACH: 169 if ((so->so_state & SS_PRIV) == 0) { 170 error = EACCES; 171 break; 172 } 173 error = raw_attach(so, (int)nam); 174 break; 175 176 /* 177 * Destroy state just before socket deallocation. 178 * Flush data or not depending on the options. 179 */ 180 case PRU_DETACH: 181 if (rp == 0) { 182 error = ENOTCONN; 183 break; 184 } 185 raw_detach(rp); 186 break; 187 188 #ifdef notdef 189 /* 190 * If a socket isn't bound to a single address, 191 * the raw input routine will hand it anything 192 * within that protocol family (assuming there's 193 * nothing else around it should go to). 194 */ 195 case PRU_CONNECT: 196 if (rp->rcb_faddr) { 197 error = EISCONN; 198 break; 199 } 200 nam = m_copym(nam, 0, M_COPYALL, M_WAIT); 201 rp->rcb_faddr = mtod(nam, struct sockaddr *); 202 soisconnected(so); 203 break; 204 205 case PRU_BIND: 206 if (rp->rcb_laddr) { 207 error = EINVAL; /* XXX */ 208 break; 209 } 210 error = raw_bind(so, nam); 211 break; 212 #endif 213 214 case PRU_CONNECT2: 215 error = EOPNOTSUPP; 216 goto release; 217 218 case PRU_DISCONNECT: 219 if (rp->rcb_faddr == 0) { 220 error = ENOTCONN; 221 break; 222 } 223 raw_disconnect(rp); 224 soisdisconnected(so); 225 break; 226 227 /* 228 * Mark the connection as being incapable of further input. 229 */ 230 case PRU_SHUTDOWN: 231 socantsendmore(so); 232 break; 233 234 /* 235 * Ship a packet out. The appropriate raw output 236 * routine handles any massaging necessary. 237 */ 238 case PRU_SEND: 239 if (nam) { 240 if (rp->rcb_faddr) { 241 error = EISCONN; 242 break; 243 } 244 rp->rcb_faddr = mtod(nam, struct sockaddr *); 245 } else if (rp->rcb_faddr == 0) { 246 error = ENOTCONN; 247 break; 248 } 249 error = (*so->so_proto->pr_output)(m, so); 250 m = NULL; 251 if (nam) 252 rp->rcb_faddr = 0; 253 break; 254 255 case PRU_ABORT: 256 raw_disconnect(rp); 257 sofree(so); 258 soisdisconnected(so); 259 break; 260 261 case PRU_SENSE: 262 /* 263 * stat: don't bother with a blocksize. 264 */ 265 return (0); 266 267 /* 268 * Not supported. 269 */ 270 case PRU_RCVOOB: 271 case PRU_RCVD: 272 return(EOPNOTSUPP); 273 274 case PRU_LISTEN: 275 case PRU_ACCEPT: 276 case PRU_SENDOOB: 277 error = EOPNOTSUPP; 278 break; 279 280 case PRU_SOCKADDR: 281 if (rp->rcb_laddr == 0) { 282 error = EINVAL; 283 break; 284 } 285 len = rp->rcb_laddr->sa_len; 286 bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), (unsigned)len); 287 nam->m_len = len; 288 break; 289 290 case PRU_PEERADDR: 291 if (rp->rcb_faddr == 0) { 292 error = ENOTCONN; 293 break; 294 } 295 len = rp->rcb_faddr->sa_len; 296 bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), (unsigned)len); 297 nam->m_len = len; 298 break; 299 300 default: 301 panic("raw_usrreq"); 302 } 303 release: 304 if (m != NULL) 305 m_freem(m); 306 return (error); 307 } 308
Indexes created Tue Sep 23 02:09:52 GMT 2025