1 /* $NetBSD: raw_usrreq.c,v 1.54 2015/05/02 17:18:03 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 1.54 2015/05/02 17:18:03 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 sockaddr *nam) 142 { 143 144 memcpy(nam, rp->rcb_laddr, rp->rcb_laddr->sa_len); 145 } 146 147 void 148 raw_setpeeraddr(struct rawcb *rp, struct sockaddr *nam) 149 { 150 151 memcpy(nam, rp->rcb_faddr, rp->rcb_faddr->sa_len); 152 } 153 154 int 155 raw_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 156 struct mbuf *control, struct lwp *l) 157 { 158 struct rawcb *rp = sotorawcb(so); 159 int error = 0; 160 161 KASSERT(rp != NULL); 162 163 /* 164 * Ship a packet out. The appropriate raw output 165 * routine handles any massaging necessary. 166 */ 167 if (control && control->m_len) { 168 m_freem(control); 169 m_freem(m); 170 return EINVAL; 171 } 172 if (nam) { 173 if ((so->so_state & SS_ISCONNECTED) != 0) { 174 error = EISCONN; 175 goto die; 176 } 177 error = (*so->so_proto->pr_usrreqs->pr_connect)(so, nam, l); 178 if (error) { 179 die: 180 m_freem(m); 181 return error; 182 } 183 } else { 184 if ((so->so_state & SS_ISCONNECTED) == 0) { 185 error = ENOTCONN; 186 goto die; 187 } 188 } 189 error = (*so->so_proto->pr_output)(m, so); 190 if (nam) 191 raw_disconnect(rp); 192 193 return error; 194 } 195 196 int 197 raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 198 struct mbuf *control, struct lwp *l) 199 { 200 201 KASSERT(req != PRU_ATTACH); 202 KASSERT(req != PRU_DETACH); 203 KASSERT(req != PRU_ACCEPT); 204 KASSERT(req != PRU_BIND); 205 KASSERT(req != PRU_LISTEN); 206 KASSERT(req != PRU_CONNECT); 207 KASSERT(req != PRU_CONNECT2); 208 KASSERT(req != PRU_DISCONNECT); 209 KASSERT(req != PRU_SHUTDOWN); 210 KASSERT(req != PRU_ABORT); 211 KASSERT(req != PRU_CONTROL); 212 KASSERT(req != PRU_SENSE); 213 KASSERT(req != PRU_PEERADDR); 214 KASSERT(req != PRU_SOCKADDR); 215 KASSERT(req != PRU_RCVD); 216 KASSERT(req != PRU_RCVOOB); 217 KASSERT(req != PRU_SEND); 218 KASSERT(req != PRU_SENDOOB); 219 KASSERT(req != PRU_PURGEIF); 220 221 if (sotorawcb(so) == NULL) 222 return EINVAL; 223 224 panic("raw_usrreq"); 225 226 return 0; 227 } 228