raw_usrreq.c revision 1.41
1 /* $NetBSD: raw_usrreq.c,v 1.41 2014/07/06 03:33:33 rtr 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 /* 35 * Raw protocol interface. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: raw_usrreq.c,v 1.41 2014/07/06 03:33:33 rtr Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/mbuf.h> 43 #include <sys/domain.h> 44 #include <sys/protosw.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/errno.h> 48 #include <sys/systm.h> 49 #include <sys/proc.h> 50 #include <sys/kauth.h> 51 52 #include <net/if.h> 53 #include <net/route.h> 54 #include <net/netisr.h> 55 #include <net/raw_cb.h> 56 57 void 58 raw_init(void) 59 { 60 LIST_INIT(&rawcb); 61 } 62 63 static inline int 64 equal(const struct sockaddr *a1, const struct sockaddr *a2) 65 { 66 return memcmp(a1, a2, a1->sa_len) == 0; 67 } 68 69 /* 70 * raw_input: find the socket associated with the packet and move it over. 71 * If nothing exists for this packet, drop it. 72 */ 73 void 74 raw_input(struct mbuf *m0, ...) 75 { 76 struct rawcb *rp; 77 struct mbuf *m = m0; 78 struct socket *last; 79 va_list ap; 80 struct sockproto *proto; 81 struct sockaddr *src, *dst; 82 83 KASSERT(mutex_owned(softnet_lock)); 84 85 va_start(ap, m0); 86 proto = va_arg(ap, struct sockproto *); 87 src = va_arg(ap, struct sockaddr *); 88 dst = va_arg(ap, struct sockaddr *); 89 va_end(ap); 90 91 last = NULL; 92 LIST_FOREACH(rp, &rawcb, rcb_list) { 93 if (rp->rcb_proto.sp_family != proto->sp_family) 94 continue; 95 if (rp->rcb_proto.sp_protocol && 96 rp->rcb_proto.sp_protocol != proto->sp_protocol) 97 continue; 98 /* 99 * We assume the lower level routines have 100 * placed the address in a canonical format 101 * suitable for a structure comparison. 102 * 103 * Note that if the lengths are not the same 104 * the comparison will fail at the first byte. 105 */ 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 != NULL) { 111 struct mbuf *n; 112 if ((n = m_copy(m, 0, M_COPYALL)) == NULL) 113 ; 114 else if (sbappendaddr(&last->so_rcv, src, n, NULL) == 0) 115 /* should notify about lost packet */ 116 m_freem(n); 117 else { 118 sorwakeup(last); 119 } 120 } 121 last = rp->rcb_socket; 122 } 123 if (last == NULL || sbappendaddr(&last->so_rcv, src, m, NULL) == 0) 124 m_freem(m); 125 else { 126 sorwakeup(last); 127 } 128 } 129 130 void * 131 raw_ctlinput(int cmd, const struct sockaddr *arg, void *d) 132 { 133 134 if ((unsigned)cmd >= PRC_NCMDS) 135 return NULL; 136 return NULL; 137 /* INCOMPLETE */ 138 } 139 140 void 141 raw_setsockaddr(struct rawcb *rp, struct mbuf *nam) 142 { 143 144 nam->m_len = rp->rcb_laddr->sa_len; 145 memcpy(mtod(nam, void *), rp->rcb_laddr, (size_t)nam->m_len); 146 } 147 148 void 149 raw_setpeeraddr(struct rawcb *rp, struct mbuf *nam) 150 { 151 152 nam->m_len = rp->rcb_faddr->sa_len; 153 memcpy(mtod(nam, void *), rp->rcb_faddr, (size_t)nam->m_len); 154 } 155 156 int 157 raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 158 struct mbuf *control, struct lwp *l) 159 { 160 struct rawcb *rp = sotorawcb(so); 161 int s, error = 0; 162 163 KASSERT(req != PRU_ATTACH); 164 KASSERT(req != PRU_DETACH); 165 KASSERT(req != PRU_CONTROL); 166 KASSERT(req != PRU_SENSE); 167 168 s = splsoftnet(); 169 KERNEL_LOCK(1, NULL); 170 171 KASSERT(!control || (req == PRU_SEND || req == PRU_SENDOOB)); 172 if (rp == NULL) { 173 error = EINVAL; 174 goto release; 175 } 176 177 switch (req) { 178 /* 179 * If a socket isn't bound to a single address, 180 * the raw input routine will hand it anything 181 * within that protocol family (assuming there's 182 * nothing else around it should go to). 183 */ 184 case PRU_BIND: 185 case PRU_LISTEN: 186 case PRU_CONNECT: 187 case PRU_CONNECT2: 188 error = EOPNOTSUPP; 189 break; 190 191 case PRU_DISCONNECT: 192 soisdisconnected(so); 193 raw_disconnect(rp); 194 break; 195 196 /* 197 * Mark the connection as being incapable of further input. 198 */ 199 case PRU_SHUTDOWN: 200 socantsendmore(so); 201 break; 202 203 case PRU_RCVD: 204 error = EOPNOTSUPP; 205 break; 206 207 /* 208 * Ship a packet out. The appropriate raw output 209 * routine handles any massaging necessary. 210 */ 211 case PRU_SEND: 212 if (control && control->m_len) { 213 m_freem(control); 214 m_freem(m); 215 error = EINVAL; 216 break; 217 } 218 if (nam) { 219 if ((so->so_state & SS_ISCONNECTED) != 0) { 220 error = EISCONN; 221 goto die; 222 } 223 error = (*so->so_proto->pr_usrreqs->pr_generic)(so, 224 PRU_CONNECT, NULL, nam, NULL, l); 225 if (error) { 226 die: 227 m_freem(m); 228 break; 229 } 230 } else { 231 if ((so->so_state & SS_ISCONNECTED) == 0) { 232 error = ENOTCONN; 233 goto die; 234 } 235 } 236 error = (*so->so_proto->pr_output)(m, so); 237 if (nam) 238 raw_disconnect(rp); 239 break; 240 241 /* 242 * Not supported. 243 */ 244 case PRU_RCVOOB: 245 error = EOPNOTSUPP; 246 break; 247 248 case PRU_SENDOOB: 249 m_freem(control); 250 m_freem(m); 251 error = EOPNOTSUPP; 252 break; 253 254 case PRU_SOCKADDR: 255 if (rp->rcb_laddr == NULL) { 256 error = EINVAL; 257 break; 258 } 259 raw_setsockaddr(rp, nam); 260 break; 261 262 case PRU_PEERADDR: 263 if (rp->rcb_faddr == NULL) { 264 error = ENOTCONN; 265 break; 266 } 267 raw_setpeeraddr(rp, nam); 268 break; 269 270 default: 271 panic("raw_usrreq"); 272 } 273 274 release: 275 KERNEL_UNLOCK_ONE(NULL); 276 splx(s); 277 return (error); 278 } 279
Indexes created Wed Sep 24 05:09:52 GMT 2025