| 1 | /* |
| 2 | * Copyright (c) 1980, 1986, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 |
| 34 | * $FreeBSD: src/sys/net/raw_usrreq.c,v 1.18 1999/08/28 00:48:28 peter Exp $ |
| 35 | * $DragonFly: src/sys/net/raw_usrreq.c,v 1.7 2004/06/06 19:16:07 dillon Exp $ |
| 36 | */ |
| 37 | |
| 38 | #include <sys/param.h> |
| 39 | #include <sys/systm.h> |
| 40 | #include <sys/mbuf.h> |
| 41 | #include <sys/proc.h> |
| 42 | #include <sys/protosw.h> |
| 43 | #include <sys/socket.h> |
| 44 | #include <sys/socketvar.h> |
| 45 | |
| 46 | #include <net/raw_cb.h> |
| 47 | |
| 48 | /* |
| 49 | * Initialize raw connection block q. |
| 50 | */ |
| 51 | void |
| 52 | raw_init() |
| 53 | { |
| 54 | LIST_INIT(&rawcb_list); |
| 55 | } |
| 56 | |
| 57 | |
| 58 | /* |
| 59 | * Raw protocol input routine. Find the socket |
| 60 | * associated with the packet(s) and move them over. If |
| 61 | * nothing exists for this packet, drop it. |
| 62 | */ |
| 63 | /* |
| 64 | * Raw protocol interface. |
| 65 | */ |
| 66 | void |
| 67 | raw_input(m0, proto, src, dst) |
| 68 | struct mbuf *m0; |
| 69 | struct sockproto *proto; |
| 70 | struct sockaddr *src, *dst; |
| 71 | { |
| 72 | struct rawcb *rp; |
| 73 | struct mbuf *m = m0; |
| 74 | int sockets = 0; |
| 75 | struct socket *last; |
| 76 | |
| 77 | last = 0; |
| 78 | LIST_FOREACH(rp, &rawcb_list, list) { |
| 79 | if (rp->rcb_proto.sp_family != proto->sp_family) |
| 80 | continue; |
| 81 | if (rp->rcb_proto.sp_protocol && |
| 82 | rp->rcb_proto.sp_protocol != proto->sp_protocol) |
| 83 | continue; |
| 84 | /* |
| 85 | * We assume the lower level routines have |
| 86 | * placed the address in a canonical format |
| 87 | * suitable for a structure comparison. |
| 88 | * |
| 89 | * Note that if the lengths are not the same |
| 90 | * the comparison will fail at the first byte. |
| 91 | */ |
| 92 | #define equal(a1, a2) \ |
| 93 | (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) |
| 94 | if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) |
| 95 | continue; |
| 96 | if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) |
| 97 | continue; |
| 98 | if (last) { |
| 99 | struct mbuf *n; |
| 100 | n = m_copy(m, 0, (int)M_COPYALL); |
| 101 | if (n) { |
| 102 | if (sbappendaddr(&last->so_rcv, src, |
| 103 | n, (struct mbuf *)0) == 0) |
| 104 | /* should notify about lost packet */ |
| 105 | m_freem(n); |
| 106 | else { |
| 107 | sorwakeup(last); |
| 108 | sockets++; |
| 109 | } |
| 110 | } |
| 111 | } |
| 112 | last = rp->rcb_socket; |
| 113 | } |
| 114 | if (last) { |
| 115 | if (sbappendaddr(&last->so_rcv, src, |
| 116 | m, (struct mbuf *)0) == 0) |
| 117 | m_freem(m); |
| 118 | else { |
| 119 | sorwakeup(last); |
| 120 | sockets++; |
| 121 | } |
| 122 | } else |
| 123 | m_freem(m); |
| 124 | } |
| 125 | |
| 126 | /*ARGSUSED*/ |
| 127 | void |
| 128 | raw_ctlinput(cmd, arg, dummy) |
| 129 | int cmd; |
| 130 | struct sockaddr *arg; |
| 131 | void *dummy; |
| 132 | { |
| 133 | |
| 134 | if (cmd < 0 || cmd > PRC_NCMDS) |
| 135 | return; |
| 136 | /* INCOMPLETE */ |
| 137 | } |
| 138 | |
| 139 | static int |
| 140 | raw_uabort(struct socket *so) |
| 141 | { |
| 142 | struct rawcb *rp = sotorawcb(so); |
| 143 | |
| 144 | if (rp == 0) |
| 145 | return EINVAL; |
| 146 | raw_disconnect(rp); |
| 147 | sofree(so); |
| 148 | soisdisconnected(so); |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | /* pru_accept is EOPNOTSUPP */ |
| 153 | |
| 154 | static int |
| 155 | raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) |
| 156 | { |
| 157 | struct rawcb *rp = sotorawcb(so); |
| 158 | int error; |
| 159 | |
| 160 | if (rp == 0) |
| 161 | return EINVAL; |
| 162 | if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0) |
| 163 | return error; |
| 164 | return raw_attach(so, proto, ai->sb_rlimit); |
| 165 | } |
| 166 | |
| 167 | static int |
| 168 | raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) |
| 169 | { |
| 170 | return EINVAL; |
| 171 | } |
| 172 | |
| 173 | static int |
| 174 | raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) |
| 175 | { |
| 176 | return EINVAL; |
| 177 | } |
| 178 | |
| 179 | /* pru_connect2 is EOPNOTSUPP */ |
| 180 | /* pru_control is EOPNOTSUPP */ |
| 181 | |
| 182 | static int |
| 183 | raw_udetach(struct socket *so) |
| 184 | { |
| 185 | struct rawcb *rp = sotorawcb(so); |
| 186 | |
| 187 | if (rp == 0) |
| 188 | return EINVAL; |
| 189 | |
| 190 | raw_detach(rp); |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static int |
| 195 | raw_udisconnect(struct socket *so) |
| 196 | { |
| 197 | struct rawcb *rp = sotorawcb(so); |
| 198 | |
| 199 | if (rp == 0) |
| 200 | return EINVAL; |
| 201 | if (rp->rcb_faddr == 0) { |
| 202 | return ENOTCONN; |
| 203 | } |
| 204 | raw_disconnect(rp); |
| 205 | soisdisconnected(so); |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | /* pru_listen is EOPNOTSUPP */ |
| 210 | |
| 211 | static int |
| 212 | raw_upeeraddr(struct socket *so, struct sockaddr **nam) |
| 213 | { |
| 214 | struct rawcb *rp = sotorawcb(so); |
| 215 | |
| 216 | if (rp == 0) |
| 217 | return EINVAL; |
| 218 | if (rp->rcb_faddr == 0) { |
| 219 | return ENOTCONN; |
| 220 | } |
| 221 | *nam = dup_sockaddr(rp->rcb_faddr); |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | /* pru_rcvd is EOPNOTSUPP */ |
| 226 | /* pru_rcvoob is EOPNOTSUPP */ |
| 227 | |
| 228 | static int |
| 229 | raw_usend(struct socket *so, int flags, struct mbuf *m, |
| 230 | struct sockaddr *nam, struct mbuf *control, struct thread *td) |
| 231 | { |
| 232 | int error; |
| 233 | struct rawcb *rp = sotorawcb(so); |
| 234 | struct pr_output_info oi; |
| 235 | |
| 236 | if (rp == 0) { |
| 237 | error = EINVAL; |
| 238 | goto release; |
| 239 | } |
| 240 | |
| 241 | if (flags & PRUS_OOB) { |
| 242 | error = EOPNOTSUPP; |
| 243 | goto release; |
| 244 | } |
| 245 | |
| 246 | if (control && control->m_len) { |
| 247 | error = EOPNOTSUPP; |
| 248 | goto release; |
| 249 | } |
| 250 | if (nam) { |
| 251 | if (rp->rcb_faddr) { |
| 252 | error = EISCONN; |
| 253 | goto release; |
| 254 | } |
| 255 | rp->rcb_faddr = nam; |
| 256 | } else if (rp->rcb_faddr == 0) { |
| 257 | error = ENOTCONN; |
| 258 | goto release; |
| 259 | } |
| 260 | oi.p_pid = td->td_proc->p_pid; |
| 261 | error = (*so->so_proto->pr_output)(m, so, &oi); |
| 262 | m = NULL; |
| 263 | if (nam) |
| 264 | rp->rcb_faddr = 0; |
| 265 | release: |
| 266 | if (m != NULL) |
| 267 | m_freem(m); |
| 268 | return (error); |
| 269 | } |
| 270 | |
| 271 | /* pru_sense is null */ |
| 272 | |
| 273 | static int |
| 274 | raw_ushutdown(struct socket *so) |
| 275 | { |
| 276 | struct rawcb *rp = sotorawcb(so); |
| 277 | |
| 278 | if (rp == 0) |
| 279 | return EINVAL; |
| 280 | socantsendmore(so); |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static int |
| 285 | raw_usockaddr(struct socket *so, struct sockaddr **nam) |
| 286 | { |
| 287 | struct rawcb *rp = sotorawcb(so); |
| 288 | |
| 289 | if (rp == 0) |
| 290 | return EINVAL; |
| 291 | if (rp->rcb_laddr == 0) |
| 292 | return EINVAL; |
| 293 | *nam = dup_sockaddr(rp->rcb_laddr); |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | struct pr_usrreqs raw_usrreqs = { |
| 298 | raw_uabort, pru_accept_notsupp, raw_uattach, raw_ubind, raw_uconnect, |
| 299 | pru_connect2_notsupp, pru_control_notsupp, raw_udetach, |
| 300 | raw_udisconnect, pru_listen_notsupp, raw_upeeraddr, pru_rcvd_notsupp, |
| 301 | pru_rcvoob_notsupp, raw_usend, pru_sense_null, raw_ushutdown, |
| 302 | raw_usockaddr, sosend, soreceive, sopoll |
| 303 | }; |