raw_usrreq.c revision 1.45
1 /* $NetBSD: raw_usrreq.c,v 1.45 2014/07/24 15:12:03 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 1.45 2014/07/24 15:12:03 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_ACCEPT); 166 KASSERT(req != PRU_BIND); 167 KASSERT(req != PRU_LISTEN); 168 KASSERT(req != PRU_CONTROL); 169 KASSERT(req != PRU_SENSE); 170 KASSERT(req != PRU_PEERADDR); 171 KASSERT(req != PRU_SOCKADDR); 172 KASSERT(req != PRU_RCVOOB); 173 KASSERT(req != PRU_SENDOOB); 174 175 s = splsoftnet(); 176 KERNEL_LOCK(1, NULL); 177 178 KASSERT(!control || req == PRU_SEND); 179 if (rp == NULL) { 180 error = EINVAL; 181 goto release; 182 } 183 184 switch (req) { 185 /* 186 * If a socket isn't bound to a single address, 187 * the raw input routine will hand it anything 188 * within that protocol family (assuming there's 189 * nothing else around it should go to). 190 */ 191 case PRU_CONNECT: 192 case PRU_CONNECT2: 193 error = EOPNOTSUPP; 194 break; 195 196 case PRU_DISCONNECT: 197 soisdisconnected(so); 198 raw_disconnect(rp); 199 break; 200 201 /* 202 * Mark the connection as being incapable of further input. 203 */ 204 case PRU_SHUTDOWN: 205 socantsendmore(so); 206 break; 207 208 case PRU_RCVD: 209 error = EOPNOTSUPP; 210 break; 211 212 /* 213 * Ship a packet out. The appropriate raw output 214 * routine handles any massaging necessary. 215 */ 216 case PRU_SEND: 217 if (control && control->m_len) { 218 m_freem(control); 219 m_freem(m); 220 error = EINVAL; 221 break; 222 } 223 if (nam) { 224 if ((so->so_state & SS_ISCONNECTED) != 0) { 225 error = EISCONN; 226 goto die; 227 } 228 error = (*so->so_proto->pr_usrreqs->pr_generic)(so, 229 PRU_CONNECT, NULL, nam, NULL, l); 230 if (error) { 231 die: 232 m_freem(m); 233 break; 234 } 235 } else { 236 if ((so->so_state & SS_ISCONNECTED) == 0) { 237 error = ENOTCONN; 238 goto die; 239 } 240 } 241 error = (*so->so_proto->pr_output)(m, so); 242 if (nam) 243 raw_disconnect(rp); 244 break; 245 246 default: 247 panic("raw_usrreq"); 248 } 249 250 release: 251 KERNEL_UNLOCK_ONE(NULL); 252 splx(s); 253 return (error); 254 } 255
Indexes created Tue Sep 23 02:09:52 GMT 2025