| 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 1.14 2007/06/24 20:00:00 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/priv.h> |
| 43 | #include <sys/protosw.h> |
| 44 | #include <sys/socket.h> |
| 45 | #include <sys/socketvar.h> |
| 46 | |
| 47 | #include <net/raw_cb.h> |
| 48 | |
| 49 | /* |
| 50 | * Initialize raw connection block q. |
| 51 | */ |
| 52 | void |
| 53 | raw_init(void) |
| 54 | { |
| 55 | LIST_INIT(&rawcb_list); |
| 56 | } |
| 57 | |
| 58 | /************************************************************************ |
| 59 | * RAW PROTOCOL INTERFACE * |
| 60 | ************************************************************************/ |
| 61 | |
| 62 | /* |
| 63 | * Raw protocol input routine. Find the socket associated with the packet(s) |
| 64 | * and move them over. If nothing exists for this packet, drop it. This |
| 65 | * routine is indirect called via rts_input() and will be serialized on |
| 66 | * cpu 0. |
| 67 | * |
| 68 | * Most other raw protocol interface functions are also serialized XXX. |
| 69 | */ |
| 70 | void |
| 71 | raw_input(struct mbuf *m0, struct sockproto *proto, const struct sockaddr *src, |
| 72 | const struct sockaddr *dst) |
| 73 | { |
| 74 | struct rawcb *rp; |
| 75 | struct mbuf *m = m0; |
| 76 | struct socket *last; |
| 77 | |
| 78 | last = NULL; |
| 79 | LIST_FOREACH(rp, &rawcb_list, list) { |
| 80 | if (rp->rcb_proto.sp_family != proto->sp_family) |
| 81 | continue; |
| 82 | if (rp->rcb_proto.sp_protocol && |
| 83 | rp->rcb_proto.sp_protocol != proto->sp_protocol) |
| 84 | continue; |
| 85 | /* |
| 86 | * We assume the lower level routines have |
| 87 | * placed the address in a canonical format |
| 88 | * suitable for a structure comparison. |
| 89 | * |
| 90 | * Note that if the lengths are not the same |
| 91 | * the comparison will fail at the first byte. |
| 92 | */ |
| 93 | if (rp->rcb_laddr && !sa_equal(rp->rcb_laddr, dst)) |
| 94 | continue; |
| 95 | if (rp->rcb_faddr && !sa_equal(rp->rcb_faddr, src)) |
| 96 | continue; |
| 97 | if (last) { |
| 98 | struct mbuf *n; |
| 99 | |
| 100 | n = m_copypacket(m, MB_DONTWAIT); |
| 101 | if (n != NULL) { |
| 102 | if (ssb_appendaddr(&last->so_rcv, src, n, |
| 103 | (struct mbuf *)0) == 0) { |
| 104 | /* should notify about lost packet */ |
| 105 | m_freem(n); |
| 106 | } else { |
| 107 | sorwakeup(last); |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | last = rp->rcb_socket; |
| 112 | } |
| 113 | if (last) { |
| 114 | if (ssb_appendaddr(&last->so_rcv, src, m, (struct mbuf *)0) == 0) |
| 115 | m_freem(m); |
| 116 | else |
| 117 | sorwakeup(last); |
| 118 | } else { |
| 119 | m_freem(m); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /*ARGSUSED*/ |
| 124 | void |
| 125 | raw_ctlinput(int cmd, struct sockaddr *arg, void *dummy) |
| 126 | { |
| 127 | |
| 128 | if (cmd < 0 || cmd > PRC_NCMDS) |
| 129 | return; |
| 130 | /* INCOMPLETE */ |
| 131 | } |
| 132 | |
| 133 | static int |
| 134 | raw_uabort(struct socket *so) |
| 135 | { |
| 136 | struct rawcb *rp = sotorawcb(so); |
| 137 | |
| 138 | if (rp == NULL) |
| 139 | return EINVAL; |
| 140 | raw_disconnect(rp); |
| 141 | sofree(so); |
| 142 | soisdisconnected(so); |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | /* pru_accept is EOPNOTSUPP */ |
| 147 | |
| 148 | static int |
| 149 | raw_uattach(struct socket *so, int proto, struct pru_attach_info *ai) |
| 150 | { |
| 151 | struct rawcb *rp = sotorawcb(so); |
| 152 | int error; |
| 153 | |
| 154 | if (rp == NULL) |
| 155 | return EINVAL; |
| 156 | if ((error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY)) != 0) |
| 157 | return error; |
| 158 | return raw_attach(so, proto, ai->sb_rlimit); |
| 159 | } |
| 160 | |
| 161 | static int |
| 162 | raw_ubind(struct socket *so, struct sockaddr *nam, struct thread *td) |
| 163 | { |
| 164 | return EINVAL; |
| 165 | } |
| 166 | |
| 167 | static int |
| 168 | raw_uconnect(struct socket *so, struct sockaddr *nam, struct thread *td) |
| 169 | { |
| 170 | return EINVAL; |
| 171 | } |
| 172 | |
| 173 | /* pru_connect2 is EOPNOTSUPP */ |
| 174 | /* pru_control is EOPNOTSUPP */ |
| 175 | |
| 176 | static int |
| 177 | raw_udetach(struct socket *so) |
| 178 | { |
| 179 | struct rawcb *rp = sotorawcb(so); |
| 180 | |
| 181 | if (rp == NULL) |
| 182 | return EINVAL; |
| 183 | |
| 184 | raw_detach(rp); |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | static int |
| 189 | raw_udisconnect(struct socket *so) |
| 190 | { |
| 191 | struct rawcb *rp = sotorawcb(so); |
| 192 | |
| 193 | if (rp == NULL) |
| 194 | return EINVAL; |
| 195 | if (rp->rcb_faddr == NULL) { |
| 196 | return ENOTCONN; |
| 197 | } |
| 198 | raw_disconnect(rp); |
| 199 | soisdisconnected(so); |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | /* pru_listen is EOPNOTSUPP */ |
| 204 | |
| 205 | static int |
| 206 | raw_upeeraddr(struct socket *so, struct sockaddr **nam) |
| 207 | { |
| 208 | struct rawcb *rp = sotorawcb(so); |
| 209 | |
| 210 | if (rp == NULL) |
| 211 | return EINVAL; |
| 212 | if (rp->rcb_faddr == NULL) { |
| 213 | return ENOTCONN; |
| 214 | } |
| 215 | *nam = dup_sockaddr(rp->rcb_faddr); |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | /* pru_rcvd is EOPNOTSUPP */ |
| 220 | /* pru_rcvoob is EOPNOTSUPP */ |
| 221 | |
| 222 | static int |
| 223 | raw_usend(struct socket *so, int flags, struct mbuf *m, |
| 224 | struct sockaddr *nam, struct mbuf *control, struct thread *td) |
| 225 | { |
| 226 | int error; |
| 227 | struct rawcb *rp = sotorawcb(so); |
| 228 | struct pr_output_info oi; |
| 229 | |
| 230 | if (rp == NULL) { |
| 231 | error = EINVAL; |
| 232 | goto release; |
| 233 | } |
| 234 | |
| 235 | if (flags & PRUS_OOB) { |
| 236 | error = EOPNOTSUPP; |
| 237 | goto release; |
| 238 | } |
| 239 | |
| 240 | if (control && control->m_len) { |
| 241 | error = EOPNOTSUPP; |
| 242 | goto release; |
| 243 | } |
| 244 | if (nam) { |
| 245 | if (rp->rcb_faddr) { |
| 246 | error = EISCONN; |
| 247 | goto release; |
| 248 | } |
| 249 | rp->rcb_faddr = nam; |
| 250 | } else if (rp->rcb_faddr == NULL) { |
| 251 | error = ENOTCONN; |
| 252 | goto release; |
| 253 | } |
| 254 | oi.p_pid = td->td_proc->p_pid; |
| 255 | error = (*so->so_proto->pr_output)(m, so, &oi); |
| 256 | m = NULL; |
| 257 | if (nam) |
| 258 | rp->rcb_faddr = NULL; |
| 259 | release: |
| 260 | if (m != NULL) |
| 261 | m_freem(m); |
| 262 | return (error); |
| 263 | } |
| 264 | |
| 265 | /* pru_sense is null */ |
| 266 | |
| 267 | static int |
| 268 | raw_ushutdown(struct socket *so) |
| 269 | { |
| 270 | struct rawcb *rp = sotorawcb(so); |
| 271 | |
| 272 | if (rp == NULL) |
| 273 | return EINVAL; |
| 274 | socantsendmore(so); |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | static int |
| 279 | raw_usockaddr(struct socket *so, struct sockaddr **nam) |
| 280 | { |
| 281 | struct rawcb *rp = sotorawcb(so); |
| 282 | |
| 283 | if (rp == NULL) |
| 284 | return EINVAL; |
| 285 | if (rp->rcb_laddr == NULL) |
| 286 | return EINVAL; |
| 287 | *nam = dup_sockaddr(rp->rcb_laddr); |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | struct pr_usrreqs raw_usrreqs = { |
| 292 | .pru_abort = raw_uabort, |
| 293 | .pru_accept = pru_accept_notsupp, |
| 294 | .pru_attach = raw_uattach, |
| 295 | .pru_bind = raw_ubind, |
| 296 | .pru_connect = raw_uconnect, |
| 297 | .pru_connect2 = pru_connect2_notsupp, |
| 298 | .pru_control = pru_control_notsupp, |
| 299 | .pru_detach = raw_udetach, |
| 300 | .pru_disconnect = raw_udisconnect, |
| 301 | .pru_listen = pru_listen_notsupp, |
| 302 | .pru_peeraddr = raw_upeeraddr, |
| 303 | .pru_rcvd = pru_rcvd_notsupp, |
| 304 | .pru_rcvoob = pru_rcvoob_notsupp, |
| 305 | .pru_send = raw_usend, |
| 306 | .pru_sense = pru_sense_null, |
| 307 | .pru_shutdown = raw_ushutdown, |
| 308 | .pru_sockaddr = raw_usockaddr, |
| 309 | .pru_sosend = sosend, |
| 310 | .pru_soreceive = soreceive, |
| 311 | .pru_sopoll = sopoll |
| 312 | }; |
| 313 | |