| 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 | |