l2cap_socket.c revision 1.6
1 /* $NetBSD: l2cap_socket.c,v 1.6 2007/03/31 18:17:13 plunky 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 1.6 2007/03/31 18:17:13 plunky Exp $"); 35 36 /* load symbolic names */ 37 #ifdef BLUETOOTH_DEBUG 38 #define PRUREQUESTS 39 #define PRCOREQUESTS 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/domain.h> 44 #include <sys/kernel.h> 45 #include <sys/mbuf.h> 46 #include <sys/proc.h> 47 #include <sys/protosw.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/systm.h> 51 52 #include <netbt/bluetooth.h> 53 #include <netbt/l2cap.h> 54 55 /* 56 * L2CAP Sockets 57 * 58 * SOCK_SEQPACKET - normal L2CAP connection 59 * 60 * SOCK_DGRAM - connectionless L2CAP - XXX not yet 61 */ 62 63 static void l2cap_connecting(void *); 64 static void l2cap_connected(void *); 65 static void l2cap_disconnected(void *, int); 66 static void *l2cap_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 67 static void l2cap_complete(void *, int); 68 static void l2cap_input(void *, struct mbuf *); 69 70 static const struct btproto l2cap_proto = { 71 l2cap_connecting, 72 l2cap_connected, 73 l2cap_disconnected, 74 l2cap_newconn, 75 l2cap_complete, 76 l2cap_input 77 }; 78 79 /* sysctl variables */ 80 int l2cap_sendspace = 4096; 81 int l2cap_recvspace = 4096; 82 83 /* 84 * User Request. 85 * up is socket 86 * m is either 87 * optional mbuf chain containing message 88 * ioctl command (PRU_CONTROL) 89 * nam is either 90 * optional mbuf chain containing an address 91 * ioctl data (PRU_CONTROL) 92 * optionally protocol number (PRU_ATTACH) 93 * message flags (PRU_RCVD) 94 * ctl is either 95 * optional mbuf chain containing socket options 96 * optional interface pointer (PRU_CONTROL, PRU_PURGEIF) 97 * l is pointer to process requesting action (if any) 98 * 99 * we are responsible for disposing of m and ctl if 100 * they are mbuf chains 101 */ 102 int 103 l2cap_usrreq(struct socket *up, int req, struct mbuf *m, 104 struct mbuf *nam, struct mbuf *ctl, struct lwp *l) 105 { 106 struct l2cap_channel *pcb = up->so_pcb; 107 struct sockaddr_bt *sa; 108 struct mbuf *m0; 109 int err = 0; 110 111 DPRINTFN(2, "%s\n", prurequests[req]); 112 113 switch (req) { 114 case PRU_CONTROL: 115 return EPASSTHROUGH; 116 117 case PRU_PURGEIF: 118 return EOPNOTSUPP; 119 120 case PRU_ATTACH: 121 if (pcb != NULL) 122 return EINVAL; 123 124 /* 125 * For L2CAP socket PCB we just use an l2cap_channel structure 126 * since we have nothing to add.. 127 */ 128 err = soreserve(up, l2cap_sendspace, l2cap_recvspace); 129 if (err) 130 return err; 131 132 return l2cap_attach((struct l2cap_channel **)&up->so_pcb, 133 &l2cap_proto, up); 134 } 135 136 if (pcb == NULL) { 137 err = EINVAL; 138 goto release; 139 } 140 141 switch(req) { 142 case PRU_DISCONNECT: 143 soisdisconnecting(up); 144 return l2cap_disconnect(pcb, up->so_linger); 145 146 case PRU_ABORT: 147 l2cap_disconnect(pcb, 0); 148 soisdisconnected(up); 149 /* fall through to */ 150 case PRU_DETACH: 151 return l2cap_detach((struct l2cap_channel **)&up->so_pcb); 152 153 case PRU_BIND: 154 KASSERT(nam != NULL); 155 sa = mtod(nam, struct sockaddr_bt *); 156 157 if (sa->bt_len != sizeof(struct sockaddr_bt)) 158 return EINVAL; 159 160 if (sa->bt_family != AF_BLUETOOTH) 161 return EAFNOSUPPORT; 162 163 return l2cap_bind(pcb, sa); 164 165 case PRU_CONNECT: 166 KASSERT(nam != NULL); 167 sa = mtod(nam, struct sockaddr_bt *); 168 169 if (sa->bt_len != sizeof(struct sockaddr_bt)) 170 return EINVAL; 171 172 if (sa->bt_family != AF_BLUETOOTH) 173 return EAFNOSUPPORT; 174 175 soisconnecting(up); 176 return l2cap_connect(pcb, sa); 177 178 case PRU_PEERADDR: 179 KASSERT(nam != NULL); 180 sa = mtod(nam, struct sockaddr_bt *); 181 nam->m_len = sizeof(struct sockaddr_bt); 182 return l2cap_peeraddr(pcb, sa); 183 184 case PRU_SOCKADDR: 185 KASSERT(nam != NULL); 186 sa = mtod(nam, struct sockaddr_bt *); 187 nam->m_len = sizeof(struct sockaddr_bt); 188 return l2cap_sockaddr(pcb, sa); 189 190 case PRU_SHUTDOWN: 191 socantsendmore(up); 192 break; 193 194 case PRU_SEND: 195 KASSERT(m != NULL); 196 if (m->m_pkthdr.len == 0) 197 break; 198 199 if (m->m_pkthdr.len > pcb->lc_omtu) { 200 err = EMSGSIZE; 201 break; 202 } 203 204 m0 = m_copypacket(m, M_DONTWAIT); 205 if (m0 == NULL) { 206 err = ENOMEM; 207 break; 208 } 209 210 if (ctl) /* no use for that */ 211 m_freem(ctl); 212 213 sbappendrecord(&up->so_snd, m); 214 return l2cap_send(pcb, m0); 215 216 case PRU_SENSE: 217 return 0; /* (no release) */ 218 219 case PRU_RCVD: 220 case PRU_RCVOOB: 221 return EOPNOTSUPP; /* (no release) */ 222 223 case PRU_LISTEN: 224 return l2cap_listen(pcb); 225 226 case PRU_ACCEPT: 227 KASSERT(nam != NULL); 228 sa = mtod(nam, struct sockaddr_bt *); 229 nam->m_len = sizeof(struct sockaddr_bt); 230 return l2cap_peeraddr(pcb, sa); 231 232 case PRU_CONNECT2: 233 case PRU_SENDOOB: 234 case PRU_FASTTIMO: 235 case PRU_SLOWTIMO: 236 case PRU_PROTORCV: 237 case PRU_PROTOSEND: 238 err = EOPNOTSUPP; 239 break; 240 241 default: 242 UNKNOWN(req); 243 err = EOPNOTSUPP; 244 break; 245 } 246 247 release: 248 if (m) m_freem(m); 249 if (ctl) m_freem(ctl); 250 return err; 251 } 252 253 /* 254 * l2cap_ctloutput(request, socket, level, optname, opt) 255 * 256 * Apply configuration commands to channel. This corresponds to 257 * "Reconfigure Channel Request" in the L2CAP specification. 258 */ 259 int 260 l2cap_ctloutput(int req, struct socket *so, int level, 261 int optname, struct mbuf **opt) 262 { 263 struct l2cap_channel *pcb = so->so_pcb; 264 struct mbuf *m; 265 int err = 0; 266 267 DPRINTFN(2, "%s\n", prcorequests[req]); 268 269 if (pcb == NULL) 270 return EINVAL; 271 272 if (level != BTPROTO_L2CAP) 273 return ENOPROTOOPT; 274 275 switch(req) { 276 case PRCO_GETOPT: 277 m = m_get(M_WAIT, MT_SOOPTS); 278 m->m_len = l2cap_getopt(pcb, optname, mtod(m, void *)); 279 if (m->m_len == 0) { 280 m_freem(m); 281 m = NULL; 282 err = ENOPROTOOPT; 283 } 284 *opt = m; 285 break; 286 287 case PRCO_SETOPT: 288 m = *opt; 289 KASSERT(m != NULL); 290 err = l2cap_setopt(pcb, optname, mtod(m, void *)); 291 m_freem(m); 292 break; 293 294 default: 295 err = ENOPROTOOPT; 296 break; 297 } 298 299 return err; 300 } 301 302 /********************************************************************** 303 * 304 * L2CAP Protocol socket callbacks 305 * 306 */ 307 308 static void 309 l2cap_connecting(void *arg) 310 { 311 struct socket *so = arg; 312 313 DPRINTF("Connecting\n"); 314 soisconnecting(so); 315 } 316 317 static void 318 l2cap_connected(void *arg) 319 { 320 struct socket *so = arg; 321 322 DPRINTF("Connected\n"); 323 soisconnected(so); 324 } 325 326 static void 327 l2cap_disconnected(void *arg, int err) 328 { 329 struct socket *so = arg; 330 331 DPRINTF("Disconnected (%d)\n", err); 332 333 so->so_error = err; 334 soisdisconnected(so); 335 } 336 337 static void * 338 l2cap_newconn(void *arg, struct sockaddr_bt *laddr, 339 struct sockaddr_bt *raddr) 340 { 341 struct socket *so = arg; 342 343 DPRINTF("New Connection\n"); 344 so = sonewconn(so, 0); 345 if (so == NULL) 346 return NULL; 347 348 soisconnecting(so); 349 350 return so->so_pcb; 351 } 352 353 static void 354 l2cap_complete(void *arg, int count) 355 { 356 struct socket *so = arg; 357 358 while (count-- > 0) 359 sbdroprecord(&so->so_snd); 360 361 sowwakeup(so); 362 } 363 364 static void 365 l2cap_input(void *arg, struct mbuf *m) 366 { 367 struct socket *so = arg; 368 369 if (m->m_pkthdr.len > sbspace(&so->so_rcv)) { 370 printf("%s: packet (%d bytes) dropped (socket buffer full)\n", 371 __func__, m->m_pkthdr.len); 372 m_freem(m); 373 return; 374 } 375 376 DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len); 377 378 sbappendrecord(&so->so_rcv, m); 379 sorwakeup(so); 380 } 381
Indexes created Tue Sep 23 02:09:52 GMT 2025