l2cap_socket.c revision 1.3.2.1
1 /* $NetBSD: l2cap_socket.c,v 1.3.2.1 2007/07/19 16:04:18 liamjfoy Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 Iain Hibbert. 5 * Copyright (c) 2006 Itronix Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of Itronix Inc. may not be used to endorse 17 * or promote products derived from this software without specific 18 * prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: l2cap_socket.c,v 1.3.2.1 2007/07/19 16:04:18 liamjfoy Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/domain.h> 38 #include <sys/kernel.h> 39 #include <sys/mbuf.h> 40 #include <sys/proc.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/systm.h> 45 46 #include <netbt/bluetooth.h> 47 #include <netbt/l2cap.h> 48 49 /* 50 * L2CAP Sockets 51 * 52 * SOCK_SEQPACKET - normal L2CAP connection 53 * 54 * SOCK_DGRAM - connectionless L2CAP - XXX not yet 55 */ 56 57 static void l2cap_connecting(void *); 58 static void l2cap_connected(void *); 59 static void l2cap_disconnected(void *, int); 60 static void *l2cap_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 61 static void l2cap_complete(void *, int); 62 static void l2cap_linkmode(void *, int); 63 static void l2cap_input(void *, struct mbuf *); 64 65 static const struct btproto l2cap_proto = { 66 l2cap_connecting, 67 l2cap_connected, 68 l2cap_disconnected, 69 l2cap_newconn, 70 l2cap_complete, 71 l2cap_linkmode, 72 l2cap_input, 73 }; 74 75 /* sysctl variables */ 76 int l2cap_sendspace = 4096; 77 int l2cap_recvspace = 4096; 78 79 /* 80 * User Request. 81 * up is socket 82 * m is either 83 * optional mbuf chain containing message 84 * ioctl command (PRU_CONTROL) 85 * nam is either 86 * optional mbuf chain containing an address 87 * ioctl data (PRU_CONTROL) 88 * optionally protocol number (PRU_ATTACH) 89 * message flags (PRU_RCVD) 90 * ctl is either 91 * optional mbuf chain containing socket options 92 * optional interface pointer (PRU_CONTROL, PRU_PURGEIF) 93 * l is pointer to process requesting action (if any) 94 * 95 * we are responsible for disposing of m and ctl if 96 * they are mbuf chains 97 */ 98 int 99 l2cap_usrreq(struct socket *up, int req, struct mbuf *m, 100 struct mbuf *nam, struct mbuf *ctl, struct lwp *l) 101 { 102 struct l2cap_channel *pcb = up->so_pcb; 103 struct sockaddr_bt *sa; 104 struct mbuf *m0; 105 int err = 0; 106 107 DPRINTFN(2, "%s\n", prurequests[req]); 108 109 switch (req) { 110 case PRU_CONTROL: 111 return EPASSTHROUGH; 112 113 case PRU_PURGEIF: 114 return EOPNOTSUPP; 115 116 case PRU_ATTACH: 117 if (pcb != NULL) 118 return EINVAL; 119 120 /* 121 * For L2CAP socket PCB we just use an l2cap_channel structure 122 * since we have nothing to add.. 123 */ 124 err = soreserve(up, l2cap_sendspace, l2cap_recvspace); 125 if (err) 126 return err; 127 128 return l2cap_attach((struct l2cap_channel **)&up->so_pcb, 129 &l2cap_proto, up); 130 } 131 132 if (pcb == NULL) { 133 err = EINVAL; 134 goto release; 135 } 136 137 switch(req) { 138 case PRU_DISCONNECT: 139 soisdisconnecting(up); 140 return l2cap_disconnect(pcb, up->so_linger); 141 142 case PRU_ABORT: 143 l2cap_disconnect(pcb, 0); 144 soisdisconnected(up); 145 /* fall through to */ 146 case PRU_DETACH: 147 return l2cap_detach((struct l2cap_channel **)&up->so_pcb); 148 149 case PRU_BIND: 150 KASSERT(nam); 151 sa = mtod(nam, struct sockaddr_bt *); 152 153 if (sa->bt_len != sizeof(struct sockaddr_bt)) 154 return EINVAL; 155 156 if (sa->bt_family != AF_BLUETOOTH) 157 return EAFNOSUPPORT; 158 159 return l2cap_bind(pcb, sa); 160 161 case PRU_CONNECT: 162 KASSERT(nam); 163 sa = mtod(nam, struct sockaddr_bt *); 164 165 if (sa->bt_len != sizeof(struct sockaddr_bt)) 166 return EINVAL; 167 168 if (sa->bt_family != AF_BLUETOOTH) 169 return EAFNOSUPPORT; 170 171 soisconnecting(up); 172 return l2cap_connect(pcb, sa); 173 174 case PRU_PEERADDR: 175 KASSERT(nam); 176 sa = mtod(nam, struct sockaddr_bt *); 177 nam->m_len = sizeof(struct sockaddr_bt); 178 return l2cap_peeraddr(pcb, sa); 179 180 case PRU_SOCKADDR: 181 KASSERT(nam); 182 sa = mtod(nam, struct sockaddr_bt *); 183 nam->m_len = sizeof(struct sockaddr_bt); 184 return l2cap_sockaddr(pcb, sa); 185 186 case PRU_SHUTDOWN: 187 socantsendmore(up); 188 break; 189 190 case PRU_SEND: 191 KASSERT(m); 192 if (m->m_pkthdr.len == 0) 193 break; 194 195 if (m->m_pkthdr.len > pcb->lc_omtu) { 196 err = EMSGSIZE; 197 break; 198 } 199 200 m0 = m_copypacket(m, M_DONTWAIT); 201 if (m0 == NULL) { 202 err = ENOMEM; 203 break; 204 } 205 206 if (ctl) /* no use for that */ 207 m_freem(ctl); 208 209 sbappendrecord(&up->so_snd, m); 210 return l2cap_send(pcb, m0); 211 212 case PRU_SENSE: 213 return 0; /* (no release) */ 214 215 case PRU_RCVD: 216 case PRU_RCVOOB: 217 return EOPNOTSUPP; /* (no release) */ 218 219 case PRU_LISTEN: 220 return l2cap_listen(pcb); 221 222 case PRU_ACCEPT: 223 KASSERT(nam); 224 sa = mtod(nam, struct sockaddr_bt *); 225 nam->m_len = sizeof(struct sockaddr_bt); 226 return l2cap_peeraddr(pcb, sa); 227 228 case PRU_CONNECT2: 229 case PRU_SENDOOB: 230 case PRU_FASTTIMO: 231 case PRU_SLOWTIMO: 232 case PRU_PROTORCV: 233 case PRU_PROTOSEND: 234 err = EOPNOTSUPP; 235 break; 236 237 default: 238 UNKNOWN(req); 239 err = EOPNOTSUPP; 240 break; 241 } 242 243 release: 244 if (m) m_freem(m); 245 if (ctl) m_freem(ctl); 246 return err; 247 } 248 249 /* 250 * l2cap_ctloutput(request, socket, level, optname, opt) 251 * 252 * Apply configuration commands to channel. This corresponds to 253 * "Reconfigure Channel Request" in the L2CAP specification. 254 */ 255 int 256 l2cap_ctloutput(int req, struct socket *so, int level, 257 int optname, struct mbuf **opt) 258 { 259 struct l2cap_channel *pcb = so->so_pcb; 260 struct mbuf *m; 261 int err = 0; 262 263 DPRINTFN(2, "%s\n", prcorequests[req]); 264 265 if (level != BTPROTO_L2CAP) 266 return 0; // err? 267 268 switch(req) { 269 case PRCO_GETOPT: 270 m = m_get(M_WAIT, MT_SOOPTS); 271 m->m_len = l2cap_getopt(pcb, optname, mtod(m, void *)); 272 if (m->m_len == 0) { 273 m_freem(m); 274 m = NULL; 275 err = EINVAL; 276 } 277 *opt = m; 278 break; 279 280 case PRCO_SETOPT: 281 m = *opt; 282 KASSERT(m != NULL); 283 err = l2cap_setopt(pcb, optname, mtod(m, void *)); 284 m_freem(m); 285 break; 286 287 default: 288 err = EINVAL; 289 break; 290 } 291 292 return err; 293 } 294 295 /********************************************************************** 296 * 297 * L2CAP Protocol socket callbacks 298 * 299 */ 300 301 static void 302 l2cap_connecting(void *arg) 303 { 304 struct socket *so = arg; 305 306 DPRINTF("Connecting\n"); 307 soisconnecting(so); 308 } 309 310 static void 311 l2cap_connected(void *arg) 312 { 313 struct socket *so = arg; 314 315 DPRINTF("Connected\n"); 316 soisconnected(so); 317 } 318 319 static void 320 l2cap_disconnected(void *arg, int err) 321 { 322 struct socket *so = arg; 323 324 DPRINTF("Disconnected (%d)\n", err); 325 326 so->so_error = err; 327 soisdisconnected(so); 328 } 329 330 static void * 331 l2cap_newconn(void *arg, struct sockaddr_bt *laddr, 332 struct sockaddr_bt *raddr) 333 { 334 struct socket *so = arg; 335 336 DPRINTF("New Connection\n"); 337 so = sonewconn(so, 0); 338 if (so == NULL) 339 return NULL; 340 341 soisconnecting(so); 342 343 return so->so_pcb; 344 } 345 346 static void 347 l2cap_complete(void *arg, int count) 348 { 349 struct socket *so = arg; 350 351 while (count-- > 0) 352 sbdroprecord(&so->so_snd); 353 354 sowwakeup(so); 355 } 356 357 static void 358 l2cap_linkmode(void *arg, int new) 359 { 360 struct socket *so = arg; 361 int mode; 362 363 DPRINTF("auth %s, encrypt %s, secure %s\n", 364 (new & L2CAP_LM_AUTH ? "on" : "off"), 365 (new & L2CAP_LM_ENCRYPT ? "on" : "off"), 366 (new & L2CAP_LM_SECURE ? "on" : "off")); 367 368 (void)l2cap_getopt(so->so_pcb, SO_L2CAP_LM, &mode); 369 if (((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH)) 370 || ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT)) 371 || ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE))) 372 l2cap_disconnect(so->so_pcb, 0); 373 } 374 375 static void 376 l2cap_input(void *arg, struct mbuf *m) 377 { 378 struct socket *so = arg; 379 380 if (m->m_pkthdr.len > sbspace(&so->so_rcv)) { 381 printf("%s: packet (%d bytes) dropped (socket buffer full)\n", 382 __func__, m->m_pkthdr.len); 383 m_freem(m); 384 return; 385 } 386 387 DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len); 388 389 sbappendrecord(&so->so_rcv, m); 390 sorwakeup(so); 391 } 392
Indexes created Tue Sep 30 07:10:03 GMT 2025