1 /* $NetBSD: raw_usrreq.c,v 1.64 2019/08/02 02:17:46 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 1.64 2019/08/02 02:17:46 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, struct sockproto *proto, struct sockaddr *src, 69 struct sockaddr *dst, struct rawcbhead *rawcbhead) 70 { 71 struct rawcb *rp; 72 struct mbuf *m = m0; 73 struct socket *last; 74 75 last = NULL; 76 LIST_FOREACH(rp, rawcbhead, rcb_list) { 77 if (rp->rcb_proto.sp_family != proto->sp_family) 78 continue; 79 if (rp->rcb_proto.sp_protocol && 80 rp->rcb_proto.sp_protocol != proto->sp_protocol) 81 continue; 82 /* 83 * We assume the lower level routines have 84 * placed the address in a canonical format 85 * suitable for a structure comparison. 86 * 87 * Note that if the lengths are not the same 88 * the comparison will fail at the first byte. 89 */ 90 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 91 continue; 92 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 93 continue; 94 /* Run any filtering that may have been installed. */ 95 if (rp->rcb_filter != NULL && rp->rcb_filter(m, proto, rp) != 0) 96 continue; 97 if (last != NULL) { 98 struct mbuf *n; 99 100 if ((n = m_copypacket(m, M_DONTWAIT)) == NULL || 101 sbappendaddr(&last->so_rcv, src, n, NULL) == 0) 102 { 103 if (n != NULL) 104 m_freem(n); 105 soroverflow(last); 106 } else 107 sorwakeup(last); 108 } 109 last = rp->rcb_socket; 110 } 111 if (last != NULL) { 112 if (sbappendaddr(&last->so_rcv, src, m, NULL) == 0) { 113 m_freem(m); 114 soroverflow(last); 115 } else 116 sorwakeup(last); 117 } else { 118 m_freem(m); 119 } 120 } 121 122 void * 123 raw_ctlinput(int cmd, const struct sockaddr *arg, void *d) 124 { 125 126 if ((unsigned)cmd >= PRC_NCMDS) 127 return NULL; 128 return NULL; 129 /* INCOMPLETE */ 130 } 131 132 void 133 raw_setsockaddr(struct rawcb *rp, struct sockaddr *nam) 134 { 135 136 memcpy(nam, rp->rcb_laddr, rp->rcb_laddr->sa_len); 137 } 138 139 void 140 raw_setpeeraddr(struct rawcb *rp, struct sockaddr *nam) 141 { 142 143 memcpy(nam, rp->rcb_faddr, rp->rcb_faddr->sa_len); 144 } 145 146 int 147 raw_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 148 struct mbuf *control, struct lwp *l, 149 int (*output)(struct mbuf *, struct socket *)) 150 { 151 struct rawcb *rp = sotorawcb(so); 152 int error = 0; 153 154 KASSERT(rp != NULL); 155 156 /* 157 * Ship a packet out. The appropriate raw output 158 * routine handles any massaging necessary. 159 */ 160 if (control && control->m_len) { 161 m_freem(control); 162 m_freem(m); 163 return EINVAL; 164 } 165 if (nam) { 166 if ((so->so_state & SS_ISCONNECTED) != 0) { 167 error = EISCONN; 168 goto die; 169 } 170 error = (*so->so_proto->pr_usrreqs->pr_connect)(so, nam, l); 171 if (error) { 172 die: 173 m_freem(m); 174 return error; 175 } 176 } else { 177 if ((so->so_state & SS_ISCONNECTED) == 0) { 178 error = ENOTCONN; 179 goto die; 180 } 181 } 182 error = (*output)(m, so); 183 if (nam) 184 raw_disconnect(rp); 185 186 return error; 187 } 188 189 int 190 raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 191 struct mbuf *control, struct lwp *l) 192 { 193 194 KASSERT(req != PRU_ATTACH); 195 KASSERT(req != PRU_DETACH); 196 KASSERT(req != PRU_ACCEPT); 197 KASSERT(req != PRU_BIND); 198 KASSERT(req != PRU_LISTEN); 199 KASSERT(req != PRU_CONNECT); 200 KASSERT(req != PRU_CONNECT2); 201 KASSERT(req != PRU_DISCONNECT); 202 KASSERT(req != PRU_SHUTDOWN); 203 KASSERT(req != PRU_ABORT); 204 KASSERT(req != PRU_CONTROL); 205 KASSERT(req != PRU_SENSE); 206 KASSERT(req != PRU_PEERADDR); 207 KASSERT(req != PRU_SOCKADDR); 208 KASSERT(req != PRU_RCVD); 209 KASSERT(req != PRU_RCVOOB); 210 KASSERT(req != PRU_SEND); 211 KASSERT(req != PRU_SENDOOB); 212 KASSERT(req != PRU_PURGEIF); 213 214 if (sotorawcb(so) == NULL) 215 return EINVAL; 216 217 panic("raw_usrreq"); 218 219 return 0; 220 } 221