1 /* $NetBSD: raw_usrreq.c,v 1.66 2024/07/05 04:31:53 rin 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 1.66 2024/07/05 04:31:53 rin 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/raw_cb.h> 55 56 static inline int 57 equal(const struct sockaddr *a1, const struct sockaddr *a2) 58 { 59 return memcmp(a1, a2, a1->sa_len) == 0; 60 } 61 62 /* 63 * raw_input: find the socket associated with the packet and move it over. 64 * If nothing exists for this packet, drop it. 65 */ 66 void 67 raw_input(struct mbuf *m0, struct sockproto *proto, struct sockaddr *src, 68 struct sockaddr *dst, struct rawcbhead *rawcbhead) 69 { 70 struct rawcb *rp; 71 struct mbuf *m = m0; 72 struct socket *last; 73 74 last = NULL; 75 LIST_FOREACH(rp, rawcbhead, rcb_list) { 76 if (rp->rcb_proto.sp_family != proto->sp_family) 77 continue; 78 if (rp->rcb_proto.sp_protocol && 79 rp->rcb_proto.sp_protocol != proto->sp_protocol) 80 continue; 81 /* 82 * We assume the lower level routines have 83 * placed the address in a canonical format 84 * suitable for a structure comparison. 85 * 86 * Note that if the lengths are not the same 87 * the comparison will fail at the first byte. 88 */ 89 if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) 90 continue; 91 if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) 92 continue; 93 /* Run any filtering that may have been installed. */ 94 if (rp->rcb_filter != NULL && rp->rcb_filter(m, proto, rp) != 0) 95 continue; 96 if (last != NULL) { 97 struct mbuf *n; 98 99 if ((n = m_copypacket(m, M_DONTWAIT)) == NULL || 100 sbappendaddr(&last->so_rcv, src, n, NULL) == 0) 101 { 102 m_freem(n); 103 soroverflow(last); 104 } else 105 sorwakeup(last); 106 } 107 last = rp->rcb_socket; 108 } 109 if (last != NULL) { 110 if (sbappendaddr(&last->so_rcv, src, m, NULL) == 0) { 111 m_freem(m); 112 soroverflow(last); 113 } else 114 sorwakeup(last); 115 } else { 116 m_freem(m); 117 } 118 } 119 120 void * 121 raw_ctlinput(int cmd, const struct sockaddr *arg, void *d) 122 { 123 124 if ((unsigned)cmd >= PRC_NCMDS) 125 return NULL; 126 return NULL; 127 /* INCOMPLETE */ 128 } 129 130 void 131 raw_setsockaddr(struct rawcb *rp, struct sockaddr *nam) 132 { 133 134 memcpy(nam, rp->rcb_laddr, rp->rcb_laddr->sa_len); 135 } 136 137 void 138 raw_setpeeraddr(struct rawcb *rp, struct sockaddr *nam) 139 { 140 141 memcpy(nam, rp->rcb_faddr, rp->rcb_faddr->sa_len); 142 } 143 144 int 145 raw_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 146 struct mbuf *control, struct lwp *l, 147 int (*output)(struct mbuf *, struct socket *)) 148 { 149 struct rawcb *rp = sotorawcb(so); 150 int error = 0; 151 152 KASSERT(rp != NULL); 153 154 /* 155 * Ship a packet out. The appropriate raw output 156 * routine handles any massaging necessary. 157 */ 158 if (control && control->m_len) { 159 m_freem(control); 160 m_freem(m); 161 return EINVAL; 162 } 163 if (nam) { 164 if ((so->so_state & SS_ISCONNECTED) != 0) { 165 error = EISCONN; 166 goto die; 167 } 168 error = (*so->so_proto->pr_usrreqs->pr_connect)(so, nam, l); 169 if (error) { 170 die: 171 m_freem(m); 172 return error; 173 } 174 } else { 175 if ((so->so_state & SS_ISCONNECTED) == 0) { 176 error = ENOTCONN; 177 goto die; 178 } 179 } 180 error = (*output)(m, so); 181 if (nam) 182 raw_disconnect(rp); 183 184 return error; 185 } 186 187 int 188 raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 189 struct mbuf *control, struct lwp *l) 190 { 191 192 KASSERT(req != PRU_ATTACH); 193 KASSERT(req != PRU_DETACH); 194 KASSERT(req != PRU_ACCEPT); 195 KASSERT(req != PRU_BIND); 196 KASSERT(req != PRU_LISTEN); 197 KASSERT(req != PRU_CONNECT); 198 KASSERT(req != PRU_CONNECT2); 199 KASSERT(req != PRU_DISCONNECT); 200 KASSERT(req != PRU_SHUTDOWN); 201 KASSERT(req != PRU_ABORT); 202 KASSERT(req != PRU_CONTROL); 203 KASSERT(req != PRU_SENSE); 204 KASSERT(req != PRU_PEERADDR); 205 KASSERT(req != PRU_SOCKADDR); 206 KASSERT(req != PRU_RCVD); 207 KASSERT(req != PRU_RCVOOB); 208 KASSERT(req != PRU_SEND); 209 KASSERT(req != PRU_SENDOOB); 210 KASSERT(req != PRU_PURGEIF); 211 212 if (sotorawcb(so) == NULL) 213 return EINVAL; 214 215 panic("raw_usrreq"); 216 217 return 0; 218 } 219