1 /* $NetBSD: sco_upper.c,v 1.8 2008/08/06 15:01:24 plunky Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Written by Iain Hibbert for Itronix Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Itronix Inc. may not be used to endorse 18 * or promote products derived from this software without specific 19 * prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 * ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: sco_upper.c,v 1.8 2008/08/06 15:01:24 plunky Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/kernel.h> 39 #include <sys/mbuf.h> 40 #include <sys/proc.h> 41 #include <sys/socketvar.h> 42 #include <sys/systm.h> 43 44 #include <netbt/bluetooth.h> 45 #include <netbt/hci.h> 46 #include <netbt/sco.h> 47 48 /**************************************************************************** 49 * 50 * SCO - Upper Protocol API 51 */ 52 53 struct sco_pcb_list sco_pcb = LIST_HEAD_INITIALIZER(sco_pcb); 54 55 /* 56 * sco_attach(handle, proto, upper) 57 * 58 * Attach a new instance of SCO pcb to handle 59 */ 60 int 61 sco_attach(struct sco_pcb **handle, 62 const struct btproto *proto, void *upper) 63 { 64 struct sco_pcb *pcb; 65 66 KASSERT(handle != NULL); 67 KASSERT(proto != NULL); 68 KASSERT(upper != NULL); 69 70 pcb = malloc(sizeof(struct sco_pcb), M_BLUETOOTH, 71 M_NOWAIT | M_ZERO); 72 if (pcb == NULL) 73 return ENOMEM; 74 75 pcb->sp_proto = proto; 76 pcb->sp_upper = upper; 77 78 LIST_INSERT_HEAD(&sco_pcb, pcb, sp_next); 79 80 *handle = pcb; 81 return 0; 82 } 83 84 /* 85 * sco_bind(pcb, sockaddr) 86 * 87 * Bind SCO pcb to local address 88 */ 89 int 90 sco_bind(struct sco_pcb *pcb, struct sockaddr_bt *addr) 91 { 92 93 bdaddr_copy(&pcb->sp_laddr, &addr->bt_bdaddr); 94 return 0; 95 } 96 97 /* 98 * sco_sockaddr(pcb, sockaddr) 99 * 100 * Copy local address of PCB to sockaddr 101 */ 102 int 103 sco_sockaddr(struct sco_pcb *pcb, struct sockaddr_bt *addr) 104 { 105 106 memset(addr, 0, sizeof(struct sockaddr_bt)); 107 addr->bt_len = sizeof(struct sockaddr_bt); 108 addr->bt_family = AF_BLUETOOTH; 109 bdaddr_copy(&addr->bt_bdaddr, &pcb->sp_laddr); 110 return 0; 111 } 112 113 /* 114 * sco_connect(pcb, sockaddr) 115 * 116 * Initiate a SCO connection to the destination address. 117 */ 118 int 119 sco_connect(struct sco_pcb *pcb, struct sockaddr_bt *dest) 120 { 121 hci_add_sco_con_cp cp; 122 struct hci_unit *unit; 123 struct hci_link *acl, *sco; 124 int err; 125 126 if (pcb->sp_flags & SP_LISTENING) 127 return EINVAL; 128 129 bdaddr_copy(&pcb->sp_raddr, &dest->bt_bdaddr); 130 131 if (bdaddr_any(&pcb->sp_raddr)) 132 return EDESTADDRREQ; 133 134 if (bdaddr_any(&pcb->sp_laddr)) { 135 err = hci_route_lookup(&pcb->sp_laddr, &pcb->sp_raddr); 136 if (err) 137 return err; 138 } 139 140 unit = hci_unit_lookup(&pcb->sp_laddr); 141 if (unit == NULL) 142 return ENETDOWN; 143 144 /* 145 * We must have an already open ACL connection before we open the SCO 146 * connection, and since SCO connections dont happen on their own we 147 * will not open one, the application wanting this should have opened 148 * it previously. 149 */ 150 acl = hci_link_lookup_bdaddr(unit, &pcb->sp_raddr, HCI_LINK_ACL); 151 if (acl == NULL || acl->hl_state != HCI_LINK_OPEN) 152 return EHOSTUNREACH; 153 154 sco = hci_link_alloc(unit, &pcb->sp_raddr, HCI_LINK_SCO); 155 if (sco == NULL) 156 return ENOMEM; 157 158 sco->hl_link = hci_acl_open(unit, &pcb->sp_raddr); 159 KASSERT(sco->hl_link == acl); 160 161 cp.con_handle = htole16(acl->hl_handle); 162 cp.pkt_type = htole16(0x00e0); /* HV1, HV2, HV3 */ 163 err = hci_send_cmd(unit, HCI_CMD_ADD_SCO_CON, &cp, sizeof(cp)); 164 if (err) { 165 hci_link_free(sco, err); 166 return err; 167 } 168 169 sco->hl_sco = pcb; 170 pcb->sp_link = sco; 171 172 pcb->sp_mtu = unit->hci_max_sco_size; 173 return 0; 174 } 175 176 /* 177 * sco_peeraddr(pcb, sockaddr) 178 * 179 * Copy remote address of SCO pcb to sockaddr 180 */ 181 int 182 sco_peeraddr(struct sco_pcb *pcb, struct sockaddr_bt *addr) 183 { 184 185 memset(addr, 0, sizeof(struct sockaddr_bt)); 186 addr->bt_len = sizeof(struct sockaddr_bt); 187 addr->bt_family = AF_BLUETOOTH; 188 bdaddr_copy(&addr->bt_bdaddr, &pcb->sp_raddr); 189 return 0; 190 } 191 192 /* 193 * sco_disconnect(pcb, linger) 194 * 195 * Initiate disconnection of connected SCO pcb 196 */ 197 int 198 sco_disconnect(struct sco_pcb *pcb, int linger) 199 { 200 hci_discon_cp cp; 201 struct hci_link *sco; 202 int err; 203 204 sco = pcb->sp_link; 205 if (sco == NULL) 206 return EINVAL; 207 208 cp.con_handle = htole16(sco->hl_handle); 209 cp.reason = 0x13; /* "Remote User Terminated Connection" */ 210 211 err = hci_send_cmd(sco->hl_unit, HCI_CMD_DISCONNECT, &cp, sizeof(cp)); 212 if (err || linger == 0) { 213 sco->hl_sco = NULL; 214 pcb->sp_link = NULL; 215 hci_link_free(sco, err); 216 } 217 218 return err; 219 } 220 221 /* 222 * sco_detach(handle) 223 * 224 * Detach SCO pcb from handle and clear up 225 */ 226 int 227 sco_detach(struct sco_pcb **handle) 228 { 229 struct sco_pcb *pcb; 230 231 KASSERT(handle != NULL); 232 pcb = *handle; 233 *handle = NULL; 234 235 if (pcb == NULL) 236 return EINVAL; 237 238 if (pcb->sp_link != NULL) { 239 sco_disconnect(pcb, 0); 240 pcb->sp_link = NULL; 241 } 242 243 LIST_REMOVE(pcb, sp_next); 244 free(pcb, M_BLUETOOTH); 245 return 0; 246 } 247 248 /* 249 * sco_listen(pcb) 250 * 251 * Mark pcb as a listener. 252 */ 253 int 254 sco_listen(struct sco_pcb *pcb) 255 { 256 257 if (pcb->sp_link != NULL) 258 return EINVAL; 259 260 pcb->sp_flags |= SP_LISTENING; 261 return 0; 262 } 263 264 /* 265 * sco_send(pcb, mbuf) 266 * 267 * Send data on SCO pcb. 268 * 269 * Gross hackage, we just output the packet directly onto the unit queue. 270 * This will work fine for one channel per unit, but for more channels it 271 * really needs fixing. We set the context so that when the packet is sent, 272 * we can drop a record from the socket buffer. 273 */ 274 int 275 sco_send(struct sco_pcb *pcb, struct mbuf *m) 276 { 277 hci_scodata_hdr_t *hdr; 278 int plen; 279 280 if (pcb->sp_link == NULL) { 281 m_freem(m); 282 return EINVAL; 283 } 284 285 plen = m->m_pkthdr.len; 286 DPRINTFN(10, "%d bytes\n", plen); 287 288 /* 289 * This is a temporary limitation, as USB devices cannot 290 * handle SCO packet sizes that are not an integer number 291 * of Isochronous frames. See ubt(4) 292 */ 293 if (plen != pcb->sp_mtu) { 294 m_freem(m); 295 return EMSGSIZE; 296 } 297 298 M_PREPEND(m, sizeof(hci_scodata_hdr_t), M_DONTWAIT); 299 if (m == NULL) 300 return ENOMEM; 301 302 hdr = mtod(m, hci_scodata_hdr_t *); 303 hdr->type = HCI_SCO_DATA_PKT; 304 hdr->con_handle = htole16(pcb->sp_link->hl_handle); 305 hdr->length = plen; 306 307 pcb->sp_pending++; 308 M_SETCTX(m, pcb->sp_link); 309 hci_output_sco(pcb->sp_link->hl_unit, m); 310 311 return 0; 312 } 313 314 /* 315 * sco_setopt(pcb, sopt) 316 * 317 * Set SCO pcb options 318 */ 319 int 320 sco_setopt(struct sco_pcb *pcb, const struct sockopt *sopt) 321 { 322 int err = 0; 323 324 switch (sopt->sopt_name) { 325 default: 326 err = ENOPROTOOPT; 327 break; 328 } 329 330 return err; 331 } 332 333 /* 334 * sco_getopt(pcb, sopt) 335 * 336 * Get SCO pcb options 337 */ 338 int 339 sco_getopt(struct sco_pcb *pcb, struct sockopt *sopt) 340 { 341 342 switch (sopt->sopt_name) { 343 case SO_SCO_MTU: 344 return sockopt_set(sopt, &pcb->sp_mtu, sizeof(uint16_t)); 345 346 case SO_SCO_HANDLE: 347 if (pcb->sp_link) 348 return sockopt_set(sopt, 349 &pcb->sp_link->hl_handle, sizeof(uint16_t)); 350 351 return ENOTCONN; 352 353 default: 354 break; 355 } 356 357 return ENOPROTOOPT; 358 } 359