raw_usrreq.c revision 1.8
1 /* $NetBSD: raw_usrreq.c,v 1.8 1994/06/29 06:36:40 cgd 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 36 */ 37 38 #include <sys/param.h> 39 #include <sys/mbuf.h> 40 #include <sys/domain.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/errno.h> 45 46 #include <net/if.h> 47 #include <net/route.h> 48 #include <net/netisr.h> 49 #include <net/raw_cb.h> 50 51 /* 52 * Initialize raw connection block q. 53 */ 54 void 55 raw_init() 56 { 57 58 rawcb.rcb_next = rawcb.rcb_prev = &rawcb; 59 } 60 61 62 /* 63 * Raw protocol input routine. Find the socket 64 * associated with the packet(s) and move them over. If 65 * nothing exists for this packet, drop it. 66 */ 67 /* 68 * Raw protocol interface. 69 */ 70 void 71 raw_input(m0, proto, src, dst) 72 struct mbuf *m0; 73 register struct sockproto *proto; 74 struct sockaddr *src, *dst; 75 { 76 register struct rawcb *rp; 77 register struct mbuf *m = m0; 78 register int sockets = 0; 79 struct socket *last; 80 81 last = 0; 82 for (rp = rawcb.rcb_next; rp != &rawcb; rp = rp->rcb_next) { 83 if (rp->rcb_proto.sp_family != proto->sp_family) 84 continue; 85 if (rp->rcb_proto.sp_protocol && 86 rp->rcb_proto.sp_protocol != proto->sp_protocol) 87 continue; 88 /* 89 * We assume the lower level routines have 90 * placed the address in a canonical format 91 * suitable for a structure comparison. 92 * 93 * Note that if the lengths are not the same 94 * the comparison will fail at the first byte. 95 */ 96 #define equal(a1, a2) \ 97 (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) 98 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 99 continue; 100 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 101 continue; 102 if (last) { 103 struct mbuf *n; 104 if (n = m_copy(m, 0, (int)M_COPYALL)) { 105 if (sbappendaddr(&last->so_rcv, src, 106 n, (struct mbuf *)0) == 0) 107 /* should notify about lost packet */ 108 m_freem(n); 109 else { 110 sorwakeup(last); 111 sockets++; 112 } 113 } 114 } 115 last = rp->rcb_socket; 116 } 117 if (last) { 118 if (sbappendaddr(&last->so_rcv, src, 119 m, (struct mbuf *)0) == 0) 120 m_freem(m); 121 else { 122 sorwakeup(last); 123 sockets++; 124 } 125 } else 126 m_freem(m); 127 } 128 129 /*ARGSUSED*/ 130 void 131 raw_ctlinput(cmd, arg) 132 int cmd; 133 struct sockaddr *arg; 134 { 135 136 if (cmd < 0 || cmd > PRC_NCMDS) 137 return; 138 /* INCOMPLETE */ 139 } 140 141 /*ARGSUSED*/ 142 int 143 raw_usrreq(so, req, m, nam, control) 144 struct socket *so; 145 int req; 146 struct mbuf *m, *nam, *control; 147 { 148 register struct rawcb *rp = sotorawcb(so); 149 register int error = 0; 150 int len; 151 152 if (req == PRU_CONTROL) 153 return (EOPNOTSUPP); 154 if (control && control->m_len) { 155 error = EOPNOTSUPP; 156 goto release; 157 } 158 if (rp == 0) { 159 error = EINVAL; 160 goto release; 161 } 162 switch (req) { 163 164 /* 165 * Allocate a raw control block and fill in the 166 * necessary info to allow packets to be routed to 167 * the appropriate raw interface routine. 168 */ 169 case PRU_ATTACH: 170 if ((so->so_state & SS_PRIV) == 0) { 171 error = EACCES; 172 break; 173 } 174 error = raw_attach(so, (int)nam); 175 break; 176 177 /* 178 * Destroy state just before socket deallocation. 179 * Flush data or not depending on the options. 180 */ 181 case PRU_DETACH: 182 if (rp == 0) { 183 error = ENOTCONN; 184 break; 185 } 186 raw_detach(rp); 187 break; 188 189 #ifdef notdef 190 /* 191 * If a socket isn't bound to a single address, 192 * the raw input routine will hand it anything 193 * within that protocol family (assuming there's 194 * nothing else around it should go to). 195 */ 196 case PRU_CONNECT: 197 if (rp->rcb_faddr) { 198 error = EISCONN; 199 break; 200 } 201 nam = m_copym(nam, 0, M_COPYALL, M_WAIT); 202 rp->rcb_faddr = mtod(nam, struct sockaddr *); 203 soisconnected(so); 204 break; 205 206 case PRU_BIND: 207 if (rp->rcb_laddr) { 208 error = EINVAL; /* XXX */ 209 break; 210 } 211 error = raw_bind(so, nam); 212 break; 213 #endif 214 215 case PRU_CONNECT2: 216 error = EOPNOTSUPP; 217 goto release; 218 219 case PRU_DISCONNECT: 220 if (rp->rcb_faddr == 0) { 221 error = ENOTCONN; 222 break; 223 } 224 raw_disconnect(rp); 225 soisdisconnected(so); 226 break; 227 228 /* 229 * Mark the connection as being incapable of further input. 230 */ 231 case PRU_SHUTDOWN: 232 socantsendmore(so); 233 break; 234 235 /* 236 * Ship a packet out. The appropriate raw output 237 * routine handles any massaging necessary. 238 */ 239 case PRU_SEND: 240 if (nam) { 241 if (rp->rcb_faddr) { 242 error = EISCONN; 243 break; 244 } 245 rp->rcb_faddr = mtod(nam, struct sockaddr *); 246 } else if (rp->rcb_faddr == 0) { 247 error = ENOTCONN; 248 break; 249 } 250 error = (*so->so_proto->pr_output)(m, so); 251 m = NULL; 252 if (nam) 253 rp->rcb_faddr = 0; 254 break; 255 256 case PRU_ABORT: 257 raw_disconnect(rp); 258 sofree(so); 259 soisdisconnected(so); 260 break; 261 262 case PRU_SENSE: 263 /* 264 * stat: don't bother with a blocksize. 265 */ 266 return (0); 267 268 /* 269 * Not supported. 270 */ 271 case PRU_RCVOOB: 272 case PRU_RCVD: 273 return(EOPNOTSUPP); 274 275 case PRU_LISTEN: 276 case PRU_ACCEPT: 277 case PRU_SENDOOB: 278 error = EOPNOTSUPP; 279 break; 280 281 case PRU_SOCKADDR: 282 if (rp->rcb_laddr == 0) { 283 error = EINVAL; 284 break; 285 } 286 len = rp->rcb_laddr->sa_len; 287 bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), (unsigned)len); 288 nam->m_len = len; 289 break; 290 291 case PRU_PEERADDR: 292 if (rp->rcb_faddr == 0) { 293 error = ENOTCONN; 294 break; 295 } 296 len = rp->rcb_faddr->sa_len; 297 bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), (unsigned)len); 298 nam->m_len = len; 299 break; 300 301 default: 302 panic("raw_usrreq"); 303 } 304 release: 305 if (m != NULL) 306 m_freem(m); 307 return (error); 308 } 309
Indexes created Mon Sep 22 13:09:51 GMT 2025