1 /* $NetBSD: raw_usrreq.c,v 1.58 2017/09/25 01:57:54 ozaki-r 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 1.58 2017/09/25 01:57:54 ozaki-r 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 static inline int 58 equal(const struct sockaddr *a1, const struct sockaddr *a2) 59 { 60 return memcmp(a1, a2, a1->sa_len) == 0; 61 } 62 63 /* 64 * raw_input: find the socket associated with the packet and move it over. 65 * If nothing exists for this packet, drop it. 66 */ 67 void 68 raw_input(struct mbuf *m0, ...) 69 { 70 struct rawcb *rp; 71 struct mbuf *m = m0; 72 struct socket *last; 73 va_list ap; 74 struct sockproto *proto; 75 struct sockaddr *src, *dst; 76 struct rawcbhead *rawcbhead; 77 78 va_start(ap, m0); 79 proto = va_arg(ap, struct sockproto *); 80 src = va_arg(ap, struct sockaddr *); 81 dst = va_arg(ap, struct sockaddr *); 82 rawcbhead = va_arg(ap, struct rawcbhead *); 83 va_end(ap); 84 85 last = NULL; 86 LIST_FOREACH(rp, rawcbhead, rcb_list) { 87 if (rp->rcb_proto.sp_family != proto->sp_family) 88 continue; 89 if (rp->rcb_proto.sp_protocol && 90 rp->rcb_proto.sp_protocol != proto->sp_protocol) 91 continue; 92 /* 93 * We assume the lower level routines have 94 * placed the address in a canonical format 95 * suitable for a structure comparison. 96 * 97 * Note that if the lengths are not the same 98 * the comparison will fail at the first byte. 99 */ 100 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 101 continue; 102 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 103 continue; 104 /* Run any filtering that may have been installed. */ 105 if (rp->rcb_filter != NULL && rp->rcb_filter(m, proto, rp) != 0) 106 continue; 107 if (last != NULL) { 108 struct mbuf *n; 109 if ((n = m_copy(m, 0, M_COPYALL)) == NULL) 110 ; 111 else if (sbappendaddr(&last->so_rcv, src, n, NULL) == 0) 112 /* should notify about lost packet */ 113 m_freem(n); 114 else { 115 sorwakeup(last); 116 } 117 } 118 last = rp->rcb_socket; 119 } 120 if (last == NULL || sbappendaddr(&last->so_rcv, src, m, NULL) == 0) 121 m_freem(m); 122 else { 123 sorwakeup(last); 124 } 125 } 126 127 void * 128 raw_ctlinput(int cmd, const struct sockaddr *arg, void *d) 129 { 130 131 if ((unsigned)cmd >= PRC_NCMDS) 132 return NULL; 133 return NULL; 134 /* INCOMPLETE */ 135 } 136 137 void 138 raw_setsockaddr(struct rawcb *rp, struct sockaddr *nam) 139 { 140 141 memcpy(nam, rp->rcb_laddr, rp->rcb_laddr->sa_len); 142 } 143 144 void 145 raw_setpeeraddr(struct rawcb *rp, struct sockaddr *nam) 146 { 147 148 memcpy(nam, rp->rcb_faddr, rp->rcb_faddr->sa_len); 149 } 150 151 int 152 raw_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 153 struct mbuf *control, struct lwp *l, 154 int (*output)(struct mbuf *, struct socket *)) 155 { 156 struct rawcb *rp = sotorawcb(so); 157 int error = 0; 158 159 KASSERT(rp != NULL); 160 161 /* 162 * Ship a packet out. The appropriate raw output 163 * routine handles any massaging necessary. 164 */ 165 if (control && control->m_len) { 166 m_freem(control); 167 m_freem(m); 168 return EINVAL; 169 } 170 if (nam) { 171 if ((so->so_state & SS_ISCONNECTED) != 0) { 172 error = EISCONN; 173 goto die; 174 } 175 error = (*so->so_proto->pr_usrreqs->pr_connect)(so, nam, l); 176 if (error) { 177 die: 178 m_freem(m); 179 return error; 180 } 181 } else { 182 if ((so->so_state & SS_ISCONNECTED) == 0) { 183 error = ENOTCONN; 184 goto die; 185 } 186 } 187 error = (*output)(m, so); 188 if (nam) 189 raw_disconnect(rp); 190 191 return error; 192 } 193 194 int 195 raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 196 struct mbuf *control, struct lwp *l) 197 { 198 199 KASSERT(req != PRU_ATTACH); 200 KASSERT(req != PRU_DETACH); 201 KASSERT(req != PRU_ACCEPT); 202 KASSERT(req != PRU_BIND); 203 KASSERT(req != PRU_LISTEN); 204 KASSERT(req != PRU_CONNECT); 205 KASSERT(req != PRU_CONNECT2); 206 KASSERT(req != PRU_DISCONNECT); 207 KASSERT(req != PRU_SHUTDOWN); 208 KASSERT(req != PRU_ABORT); 209 KASSERT(req != PRU_CONTROL); 210 KASSERT(req != PRU_SENSE); 211 KASSERT(req != PRU_PEERADDR); 212 KASSERT(req != PRU_SOCKADDR); 213 KASSERT(req != PRU_RCVD); 214 KASSERT(req != PRU_RCVOOB); 215 KASSERT(req != PRU_SEND); 216 KASSERT(req != PRU_SENDOOB); 217 KASSERT(req != PRU_PURGEIF); 218 219 if (sotorawcb(so) == NULL) 220 return EINVAL; 221 222 panic("raw_usrreq"); 223 224 return 0; 225 } 226