1 /* $NetBSD: sco_upper.c,v 1.16 2014/08/05 07:55:32 rtr 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 1.16 2014/08/05 07:55:32 rtr 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_pcb(handle, proto, upper) 57 * 58 * Attach a new instance of SCO pcb to handle 59 */ 60 int 61 sco_attach_pcb(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(pcb, sockaddr) 86 * 87 * Bind SCO pcb to local address 88 */ 89 int 90 sco_bind_pcb(struct sco_pcb *pcb, struct sockaddr_bt *addr) 91 { 92 93 if (pcb->sp_link != NULL || pcb->sp_flags & SP_LISTENING) 94 return EINVAL; 95 96 bdaddr_copy(&pcb->sp_laddr, &addr->bt_bdaddr); 97 return 0; 98 } 99 100 /* 101 * sco_sockaddr_pcb(pcb, sockaddr) 102 * 103 * Copy local address of PCB to sockaddr 104 */ 105 int 106 sco_sockaddr_pcb(struct sco_pcb *pcb, struct sockaddr_bt *addr) 107 { 108 109 memset(addr, 0, sizeof(struct sockaddr_bt)); 110 addr->bt_len = sizeof(struct sockaddr_bt); 111 addr->bt_family = AF_BLUETOOTH; 112 bdaddr_copy(&addr->bt_bdaddr, &pcb->sp_laddr); 113 return 0; 114 } 115 116 /* 117 * sco_connect_pcb(pcb, sockaddr) 118 * 119 * Initiate a SCO connection to the destination address. 120 */ 121 int 122 sco_connect_pcb(struct sco_pcb *pcb, struct sockaddr_bt *dest) 123 { 124 hci_add_sco_con_cp cp; 125 struct hci_unit *unit; 126 struct hci_link *acl, *sco; 127 int err; 128 129 if (pcb->sp_flags & SP_LISTENING) 130 return EINVAL; 131 132 bdaddr_copy(&pcb->sp_raddr, &dest->bt_bdaddr); 133 134 if (bdaddr_any(&pcb->sp_raddr)) 135 return EDESTADDRREQ; 136 137 if (bdaddr_any(&pcb->sp_laddr)) { 138 err = hci_route_lookup(&pcb->sp_laddr, &pcb->sp_raddr); 139 if (err) 140 return err; 141 } 142 143 unit = hci_unit_lookup(&pcb->sp_laddr); 144 if (unit == NULL) 145 return ENETDOWN; 146 147 /* 148 * We must have an already open ACL connection before we open the SCO 149 * connection, and since SCO connections dont happen on their own we 150 * will not open one, the application wanting this should have opened 151 * it previously. 152 */ 153 acl = hci_link_lookup_bdaddr(unit, &pcb->sp_raddr, HCI_LINK_ACL); 154 if (acl == NULL || acl->hl_state != HCI_LINK_OPEN) 155 return EHOSTUNREACH; 156 157 sco = hci_link_alloc(unit, &pcb->sp_raddr, HCI_LINK_SCO); 158 if (sco == NULL) 159 return ENOMEM; 160 161 sco->hl_link = hci_acl_open(unit, &pcb->sp_raddr); 162 KASSERT(sco->hl_link == acl); 163 164 cp.con_handle = htole16(acl->hl_handle); 165 cp.pkt_type = htole16(0x00e0); /* HV1, HV2, HV3 */ 166 err = hci_send_cmd(unit, HCI_CMD_ADD_SCO_CON, &cp, sizeof(cp)); 167 if (err) { 168 hci_link_free(sco, err); 169 return err; 170 } 171 172 sco->hl_sco = pcb; 173 pcb->sp_link = sco; 174 175 pcb->sp_mtu = unit->hci_max_sco_size; 176 return 0; 177 } 178 179 /* 180 * sco_peeraddr_pcb(pcb, sockaddr) 181 * 182 * Copy remote address of SCO pcb to sockaddr 183 */ 184 int 185 sco_peeraddr_pcb(struct sco_pcb *pcb, struct sockaddr_bt *addr) 186 { 187 188 memset(addr, 0, sizeof(struct sockaddr_bt)); 189 addr->bt_len = sizeof(struct sockaddr_bt); 190 addr->bt_family = AF_BLUETOOTH; 191 bdaddr_copy(&addr->bt_bdaddr, &pcb->sp_raddr); 192 return 0; 193 } 194 195 /* 196 * sco_disconnect_pcb(pcb, linger) 197 * 198 * Initiate disconnection of connected SCO pcb 199 */ 200 int 201 sco_disconnect_pcb(struct sco_pcb *pcb, int linger) 202 { 203 hci_discon_cp cp; 204 struct hci_link *sco; 205 int err; 206 207 sco = pcb->sp_link; 208 if (sco == NULL) 209 return EINVAL; 210 211 cp.con_handle = htole16(sco->hl_handle); 212 cp.reason = 0x13; /* "Remote User Terminated Connection" */ 213 214 err = hci_send_cmd(sco->hl_unit, HCI_CMD_DISCONNECT, &cp, sizeof(cp)); 215 if (err || linger == 0) { 216 sco->hl_sco = NULL; 217 pcb->sp_link = NULL; 218 hci_link_free(sco, err); 219 } 220 221 return err; 222 } 223 224 /* 225 * sco_detach_pcb(handle) 226 * 227 * Detach SCO pcb from handle and clear up 228 */ 229 void 230 sco_detach_pcb(struct sco_pcb **handle) 231 { 232 struct sco_pcb *pcb; 233 234 KASSERT(handle != NULL); 235 pcb = *handle; 236 *handle = NULL; 237 238 if (pcb->sp_link != NULL) { 239 sco_disconnect_pcb(pcb, 0); 240 pcb->sp_link = NULL; 241 } 242 243 LIST_REMOVE(pcb, sp_next); 244 free(pcb, M_BLUETOOTH); 245 } 246 247 /* 248 * sco_listen_pcb(pcb) 249 * 250 * Mark pcb as a listener. 251 */ 252 int 253 sco_listen_pcb(struct sco_pcb *pcb) 254 { 255 256 if (pcb->sp_link != NULL) 257 return EINVAL; 258 259 pcb->sp_flags |= SP_LISTENING; 260 return 0; 261 } 262 263 /* 264 * sco_send_pcb(pcb, mbuf) 265 * 266 * Send data on SCO pcb. 267 * 268 * Gross hackage, we just output the packet directly onto the unit queue. 269 * This will work fine for one channel per unit, but for more channels it 270 * really needs fixing. We set the context so that when the packet is sent, 271 * we can drop a record from the socket buffer. 272 */ 273 int 274 sco_send_pcb(struct sco_pcb *pcb, struct mbuf *m) 275 { 276 hci_scodata_hdr_t *hdr; 277 int plen; 278 279 if (pcb->sp_link == NULL) { 280 m_freem(m); 281 return EINVAL; 282 } 283 284 plen = m->m_pkthdr.len; 285 DPRINTFN(10, "%d bytes\n", plen); 286 287 /* 288 * This is a temporary limitation, as USB devices cannot 289 * handle SCO packet sizes that are not an integer number 290 * of Isochronous frames. See ubt(4) 291 */ 292 if (plen != pcb->sp_mtu) { 293 m_freem(m); 294 return EMSGSIZE; 295 } 296 297 M_PREPEND(m, sizeof(hci_scodata_hdr_t), M_DONTWAIT); 298 if (m == NULL) 299 return ENOMEM; 300 301 hdr = mtod(m, hci_scodata_hdr_t *); 302 hdr->type = HCI_SCO_DATA_PKT; 303 hdr->con_handle = htole16(pcb->sp_link->hl_handle); 304 hdr->length = plen; 305 306 pcb->sp_pending++; 307 M_SETCTX(m, pcb->sp_link); 308 hci_output_sco(pcb->sp_link->hl_unit, m); 309 310 return 0; 311 } 312 313 /* 314 * sco_setopt(pcb, sopt) 315 * 316 * Set SCO pcb options 317 */ 318 int 319 sco_setopt(struct sco_pcb *pcb, const struct sockopt *sopt) 320 { 321 int err = 0; 322 323 switch (sopt->sopt_name) { 324 default: 325 err = ENOPROTOOPT; 326 break; 327 } 328 329 return err; 330 } 331 332 /* 333 * sco_getopt(pcb, sopt) 334 * 335 * Get SCO pcb options 336 */ 337 int 338 sco_getopt(struct sco_pcb *pcb, struct sockopt *sopt) 339 { 340 341 switch (sopt->sopt_name) { 342 case SO_SCO_MTU: 343 return sockopt_set(sopt, &pcb->sp_mtu, sizeof(uint16_t)); 344 345 case SO_SCO_HANDLE: 346 if (pcb->sp_link) 347 return sockopt_set(sopt, 348 &pcb->sp_link->hl_handle, sizeof(uint16_t)); 349 350 return ENOTCONN; 351 352 default: 353 break; 354 } 355 356 return ENOPROTOOPT; 357 } 358
Indexes created Sat Sep 20 22:09:52 GMT 2025