1/* 2 * ng_l2cap_main.c 3 */ 4 5/*- 6 * Copyright (c) Maksim Yevmenkin <m_evmenkin@yahoo.com> 7 * All rights reserved. 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $Id: ng_l2cap_main.c,v 1.2 2003/04/28 21:44:59 max Exp $ 31 * $FreeBSD$ 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/kernel.h> 37#include <sys/malloc.h> 38#include <sys/mbuf.h> 39#include <sys/queue.h> 40#include <netgraph/ng_message.h> 41#include <netgraph/netgraph.h> 42#include <netgraph/ng_parse.h> 43#include <netgraph/bluetooth/include/ng_bluetooth.h> 44#include <netgraph/bluetooth/include/ng_hci.h> 45#include <netgraph/bluetooth/include/ng_l2cap.h> 46#include <netgraph/bluetooth/l2cap/ng_l2cap_var.h> 47#include <netgraph/bluetooth/l2cap/ng_l2cap_cmds.h> 48#include <netgraph/bluetooth/l2cap/ng_l2cap_evnt.h> 49#include <netgraph/bluetooth/l2cap/ng_l2cap_llpi.h> 50#include <netgraph/bluetooth/l2cap/ng_l2cap_ulpi.h> 51#include <netgraph/bluetooth/l2cap/ng_l2cap_misc.h> 52#include <netgraph/bluetooth/l2cap/ng_l2cap_prse.h> 53 54/****************************************************************************** 55 ****************************************************************************** 56 ** This node implements Link Layer Control and Adaptation Protocol (L2CAP) 57 ****************************************************************************** 58 ******************************************************************************/ 59 60/* MALLOC define */ 61#ifdef NG_SEPARATE_MALLOC 62MALLOC_DEFINE(M_NETGRAPH_L2CAP, "netgraph_l2cap", 63 "Netgraph Bluetooth L2CAP node"); 64#else 65#define M_NETGRAPH_L2CAP M_NETGRAPH 66#endif /* NG_SEPARATE_MALLOC */ 67 68/* Netgraph node methods */ 69static ng_constructor_t ng_l2cap_constructor; 70static ng_shutdown_t ng_l2cap_shutdown; 71static ng_newhook_t ng_l2cap_newhook; 72static ng_connect_t ng_l2cap_connect; 73static ng_disconnect_t ng_l2cap_disconnect; 74static ng_rcvmsg_t ng_l2cap_lower_rcvmsg; 75static ng_rcvmsg_t ng_l2cap_upper_rcvmsg; 76static ng_rcvmsg_t ng_l2cap_default_rcvmsg; 77static ng_rcvdata_t ng_l2cap_rcvdata; 78 79/* Netgraph node type descriptor */ 80static struct ng_type typestruct = { 81 .version = NG_ABI_VERSION, 82 .name = NG_L2CAP_NODE_TYPE, 83 .constructor = ng_l2cap_constructor, 84 .rcvmsg = ng_l2cap_default_rcvmsg, 85 .shutdown = ng_l2cap_shutdown, 86 .newhook = ng_l2cap_newhook, 87 .connect = ng_l2cap_connect, 88 .rcvdata = ng_l2cap_rcvdata, 89 .disconnect = ng_l2cap_disconnect, 90 .cmdlist = ng_l2cap_cmdlist, 91}; 92NETGRAPH_INIT(l2cap, &typestruct); 93MODULE_VERSION(ng_l2cap, NG_BLUETOOTH_VERSION); 94MODULE_DEPEND(ng_l2cap, ng_bluetooth, NG_BLUETOOTH_VERSION, 95 NG_BLUETOOTH_VERSION, NG_BLUETOOTH_VERSION); 96 97/***************************************************************************** 98 ***************************************************************************** 99 ** Netgraph methods implementation 100 ***************************************************************************** 101 *****************************************************************************/ 102 103static void ng_l2cap_cleanup (ng_l2cap_p); 104static void ng_l2cap_destroy_channels (ng_l2cap_p); 105 106/* 107 * Create new instance of L2CAP node 108 */ 109 110static int 111ng_l2cap_constructor(node_p node) 112{ 113 ng_l2cap_p l2cap = NULL; 114 115 /* Create new L2CAP node */ 116 l2cap = malloc(sizeof(*l2cap), M_NETGRAPH_L2CAP, M_WAITOK | M_ZERO); 117 118 l2cap->node = node; 119 l2cap->debug = NG_L2CAP_WARN_LEVEL; 120 l2cap->discon_timo = 5; /* sec */ 121 122 LIST_INIT(&l2cap->con_list); 123 LIST_INIT(&l2cap->chan_list); 124 125 NG_NODE_SET_PRIVATE(node, l2cap); 126 NG_NODE_FORCE_WRITER(node); 127 128 return (0); 129} /* ng_l2cap_constructor */ 130 131/* 132 * Shutdown L2CAP node 133 */ 134 135static int 136ng_l2cap_shutdown(node_p node) 137{ 138 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node); 139 140 NG_NODE_SET_PRIVATE(node, NULL); 141 NG_NODE_UNREF(node); 142 143 /* Clean up L2CAP node. Delete all connection, channels and commands */ 144 l2cap->node = NULL; 145 ng_l2cap_cleanup(l2cap); 146 147 bzero(l2cap, sizeof(*l2cap)); 148 free(l2cap, M_NETGRAPH_L2CAP); 149 150 return (0); 151} /* ng_l2cap_shutdown */ 152 153/* 154 * Give our OK for a hook to be added. HCI layer is connected to the HCI 155 * (NG_L2CAP_HOOK_HCI) hook. As per specification L2CAP layer MUST provide 156 * Procol/Service Multiplexing, so the L2CAP node provides separate hooks 157 * for SDP (NG_L2CAP_HOOK_SDP), RFCOMM (NG_L2CAP_HOOK_RFCOMM) and TCP 158 * (NG_L2CAP_HOOK_TCP) protcols. Unknown PSM will be forwarded to 159 * NG_L2CAP_HOOK_ORPHAN hook. Control node/application is connected to 160 * control (NG_L2CAP_HOOK_CTL) hook. 161 */ 162 163static int 164ng_l2cap_newhook(node_p node, hook_p hook, char const *name) 165{ 166 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node); 167 hook_p *h = NULL; 168 169 if (strcmp(name, NG_L2CAP_HOOK_HCI) == 0) 170 h = &l2cap->hci; 171 else if (strcmp(name, NG_L2CAP_HOOK_L2C) == 0) 172 h = &l2cap->l2c; 173 else if (strcmp(name, NG_L2CAP_HOOK_CTL) == 0) 174 h = &l2cap->ctl; 175 else 176 return (EINVAL); 177 178 if (*h != NULL) 179 return (EISCONN); 180 181 *h = hook; 182 183 return (0); 184} /* ng_l2cap_newhook */ 185 186/* 187 * Give our final OK to connect hook. Nothing to do here. 188 */ 189 190static int 191ng_l2cap_connect(hook_p hook) 192{ 193 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 194 int error = 0; 195 196 if (hook == l2cap->hci) 197 NG_HOOK_SET_RCVMSG(hook, ng_l2cap_lower_rcvmsg); 198 else 199 if (hook == l2cap->l2c || hook == l2cap->ctl) { 200 NG_HOOK_SET_RCVMSG(hook, ng_l2cap_upper_rcvmsg); 201 202 /* Send delayed notification to the upper layer */ 203 error = ng_send_fn(l2cap->node, hook, ng_l2cap_send_hook_info, 204 NULL, 0); 205 } else 206 error = EINVAL; 207 208 return (error); 209} /* ng_l2cap_connect */ 210 211/* 212 * Disconnect the hook. For downstream hook we must notify upper layers. 213 * 214 * XXX For upstream hooks this is really ugly :( Hook was disconnected and it 215 * XXX is now too late to do anything. For now we just clean up our own mess 216 * XXX and remove all channels that use disconnected upstream hook. If we don't 217 * XXX do that then L2CAP node can get out of sync with upper layers. 218 * XXX No notification will be sent to remote peer. 219 */ 220 221static int 222ng_l2cap_disconnect(hook_p hook) 223{ 224 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 225 hook_p *h = NULL; 226 227 if (hook == l2cap->hci) { 228 ng_l2cap_cleanup(l2cap); 229 h = &l2cap->hci; 230 } else 231 if (hook == l2cap->l2c) { 232 ng_l2cap_destroy_channels(l2cap); 233 h = &l2cap->l2c; 234 } else 235 if (hook == l2cap->ctl) 236 h = &l2cap->ctl; 237 else 238 return (EINVAL); 239 240 *h = NULL; 241 242 /* Shutdown when all hooks are disconnected */ 243 if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0 && 244 NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) 245 ng_rmnode_self(NG_HOOK_NODE(hook)); 246 247 return (0); 248} /* ng_l2cap_disconnect */ 249 250/* 251 * Process control message from lower layer 252 */ 253 254static int 255ng_l2cap_lower_rcvmsg(node_p node, item_p item, hook_p lasthook) 256{ 257 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node); 258 struct ng_mesg *msg = NGI_MSG(item); /* item still has message */ 259 int error = 0; 260 261 switch (msg->header.typecookie) { 262 case NGM_HCI_COOKIE: 263 switch (msg->header.cmd) { 264 /* HCI node is ready */ 265 case NGM_HCI_NODE_UP: { 266 ng_hci_node_up_ep *ep = NULL; 267 268 if (msg->header.arglen != sizeof(*ep)) 269 error = EMSGSIZE; 270 else { 271 ep = (ng_hci_node_up_ep *)(msg->data); 272 273 NG_L2CAP_INFO( 274"%s: %s - HCI node is up, bdaddr: %x:%x:%x:%x:%x:%x, " \ 275"pkt_size=%d bytes, num_pkts=%d\n", __func__, NG_NODE_NAME(l2cap->node), 276 ep->bdaddr.b[5], ep->bdaddr.b[4], 277 ep->bdaddr.b[3], ep->bdaddr.b[2], 278 ep->bdaddr.b[1], ep->bdaddr.b[0], 279 ep->pkt_size, ep->num_pkts); 280 281 bcopy(&ep->bdaddr, &l2cap->bdaddr, 282 sizeof(l2cap->bdaddr)); 283 l2cap->pkt_size = ep->pkt_size; 284 l2cap->num_pkts = ep->num_pkts; 285 286 /* Notify upper layers */ 287 ng_l2cap_send_hook_info(l2cap->node, 288 l2cap->l2c, NULL, 0); 289 ng_l2cap_send_hook_info(l2cap->node, 290 l2cap->ctl, NULL, 0); 291 } 292 } break; 293 294 case NGM_HCI_SYNC_CON_QUEUE: { 295 ng_hci_sync_con_queue_ep *ep = NULL; 296 ng_l2cap_con_p con = NULL; 297 298 if (msg->header.arglen != sizeof(*ep)) 299 error = EMSGSIZE; 300 else { 301 ep = (ng_hci_sync_con_queue_ep *)(msg->data); 302 con = ng_l2cap_con_by_handle(l2cap, 303 ep->con_handle); 304 if (con == NULL) 305 break; 306 307 NG_L2CAP_INFO( 308"%s: %s - sync HCI connection queue, con_handle=%d, pending=%d, completed=%d\n", 309 __func__, NG_NODE_NAME(l2cap->node), 310 ep->con_handle, con->pending, 311 ep->completed); 312 313 con->pending -= ep->completed; 314 if (con->pending < 0) { 315 NG_L2CAP_WARN( 316"%s: %s - pending packet counter is out of sync! " \ 317"con_handle=%d, pending=%d, completed=%d\n", __func__, 318 NG_NODE_NAME(l2cap->node), 319 con->con_handle, con->pending, 320 ep->completed); 321 322 con->pending = 0; 323 } 324 325 ng_l2cap_lp_deliver(con); 326 } 327 } break; 328 329 /* LP_ConnectCfm[Neg] */ 330 case NGM_HCI_LP_CON_CFM: 331 error = ng_l2cap_lp_con_cfm(l2cap, msg); 332 break; 333 334 /* LP_ConnectInd */ 335 case NGM_HCI_LP_CON_IND: 336 error = ng_l2cap_lp_con_ind(l2cap, msg); 337 break; 338 339 /* LP_DisconnectInd */ 340 case NGM_HCI_LP_DISCON_IND: 341 error = ng_l2cap_lp_discon_ind(l2cap, msg); 342 break; 343 344 /* LP_QoSSetupCfm[Neg] */ 345 case NGM_HCI_LP_QOS_CFM: 346 error = ng_l2cap_lp_qos_cfm(l2cap, msg); 347 break; 348 349 /* LP_OoSViolationInd */ 350 case NGM_HCI_LP_QOS_IND: 351 error = ng_l2cap_lp_qos_ind(l2cap, msg); 352 break; 353 354 default: 355 error = EINVAL; 356 break; 357 } 358 break; 359 360 default: 361 return (ng_l2cap_default_rcvmsg(node, item, lasthook)); 362 /* NOT REACHED */ 363 } 364 365 NG_FREE_ITEM(item); 366 367 return (error); 368} /* ng_l2cap_lower_rcvmsg */ 369 370/* 371 * Process control message from upper layer 372 */ 373 374static int 375ng_l2cap_upper_rcvmsg(node_p node, item_p item, hook_p lasthook) 376{ 377 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node); 378 struct ng_mesg *msg = NGI_MSG(item); /* item still has message */ 379 int error = 0; 380 381 switch (msg->header.typecookie) { 382 case NGM_L2CAP_COOKIE: 383 switch (msg->header.cmd) { 384 /* L2CA_Connect */ 385 case NGM_L2CAP_L2CA_CON: 386 error = ng_l2cap_l2ca_con_req(l2cap, msg); 387 break; 388 389 /* L2CA_ConnectRsp */ 390 case NGM_L2CAP_L2CA_CON_RSP: 391 error = ng_l2cap_l2ca_con_rsp_req(l2cap, msg); 392 break; 393 394 /* L2CA_Config */ 395 case NGM_L2CAP_L2CA_CFG: 396 error = ng_l2cap_l2ca_cfg_req(l2cap, msg); 397 break; 398 399 /* L2CA_ConfigRsp */ 400 case NGM_L2CAP_L2CA_CFG_RSP: 401 error = ng_l2cap_l2ca_cfg_rsp_req(l2cap, msg); 402 break; 403 404 /* L2CA_Disconnect */ 405 case NGM_L2CAP_L2CA_DISCON: 406 error = ng_l2cap_l2ca_discon_req(l2cap, msg); 407 break; 408 409 /* L2CA_GroupCreate */ 410 case NGM_L2CAP_L2CA_GRP_CREATE: 411 error = ng_l2cap_l2ca_grp_create(l2cap, msg); 412 break; 413 414 /* L2CA_GroupClose */ 415 case NGM_L2CAP_L2CA_GRP_CLOSE: 416 error = ng_l2cap_l2ca_grp_close(l2cap, msg); 417 break; 418 419 /* L2CA_GroupAddMember */ 420 case NGM_L2CAP_L2CA_GRP_ADD_MEMBER: 421 error = ng_l2cap_l2ca_grp_add_member_req(l2cap, msg); 422 break; 423 424 /* L2CA_GroupDeleteMember */ 425 case NGM_L2CAP_L2CA_GRP_REM_MEMBER: 426 error = ng_l2cap_l2ca_grp_rem_member(l2cap, msg); 427 break; 428 429 /* L2CA_GroupMembership */ 430 case NGM_L2CAP_L2CA_GRP_MEMBERSHIP: 431 error = ng_l2cap_l2ca_grp_get_members(l2cap, msg); 432 break; 433 434 /* L2CA_Ping */ 435 case NGM_L2CAP_L2CA_PING: 436 error = ng_l2cap_l2ca_ping_req(l2cap, msg); 437 break; 438 439 /* L2CA_GetInfo */ 440 case NGM_L2CAP_L2CA_GET_INFO: 441 error = ng_l2cap_l2ca_get_info_req(l2cap, msg); 442 break; 443 444 /* L2CA_EnableCLT */ 445 case NGM_L2CAP_L2CA_ENABLE_CLT: 446 error = ng_l2cap_l2ca_enable_clt(l2cap, msg); 447 break; 448 449 default: 450 return (ng_l2cap_default_rcvmsg(node, item, lasthook)); 451 /* NOT REACHED */ 452 } 453 break; 454 455 default: 456 return (ng_l2cap_default_rcvmsg(node, item, lasthook)); 457 /* NOT REACHED */ 458 } 459 460 NG_FREE_ITEM(item); 461 462 return (error); 463} /* ng_l2cap_upper_rcvmsg */ 464 465/* 466 * Default control message processing routine 467 */ 468 469static int 470ng_l2cap_default_rcvmsg(node_p node, item_p item, hook_p lasthook) 471{ 472 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node); 473 struct ng_mesg *msg = NULL, *rsp = NULL; 474 int error = 0; 475 476 /* Detach and process message */ 477 NGI_GET_MSG(item, msg); 478 479 switch (msg->header.typecookie) { 480 case NGM_GENERIC_COOKIE: 481 switch (msg->header.cmd) { 482 case NGM_TEXT_STATUS: 483 NG_MKRESPONSE(rsp, msg, NG_TEXTRESPONSE, M_NOWAIT); 484 if (rsp == NULL) 485 error = ENOMEM; 486 else 487 snprintf(rsp->data, NG_TEXTRESPONSE, 488 "bdaddr %x:%x:%x:%x:%x:%x, " \ 489 "pkt_size %d\n" \ 490 "Hooks %s %s %s\n" \ 491 "Flags %#x\n", 492 l2cap->bdaddr.b[5], l2cap->bdaddr.b[4], 493 l2cap->bdaddr.b[3], l2cap->bdaddr.b[2], 494 l2cap->bdaddr.b[1], l2cap->bdaddr.b[0], 495 l2cap->pkt_size, 496 (l2cap->hci != NULL)? 497 NG_L2CAP_HOOK_HCI : "", 498 (l2cap->l2c != NULL)? 499 NG_L2CAP_HOOK_L2C : "", 500 (l2cap->ctl != NULL)? 501 NG_L2CAP_HOOK_CTL : "", 502 l2cap->flags); 503 break; 504 505 default: 506 error = EINVAL; 507 break; 508 } 509 break; 510 511 /* Messages from the upper layer or directed to the local node */ 512 case NGM_L2CAP_COOKIE: 513 switch (msg->header.cmd) { 514 /* Get node flags */ 515 case NGM_L2CAP_NODE_GET_FLAGS: 516 NG_MKRESPONSE(rsp, msg, sizeof(ng_l2cap_node_flags_ep), 517 M_NOWAIT); 518 if (rsp == NULL) 519 error = ENOMEM; 520 else 521 *((ng_l2cap_node_flags_ep *)(rsp->data)) = 522 l2cap->flags; 523 break; 524 525 /* Get node debug */ 526 case NGM_L2CAP_NODE_GET_DEBUG: 527 NG_MKRESPONSE(rsp, msg, sizeof(ng_l2cap_node_debug_ep), 528 M_NOWAIT); 529 if (rsp == NULL) 530 error = ENOMEM; 531 else 532 *((ng_l2cap_node_debug_ep *)(rsp->data)) = 533 l2cap->debug; 534 break; 535 536 /* Set node debug */ 537 case NGM_L2CAP_NODE_SET_DEBUG: 538 if (msg->header.arglen != 539 sizeof(ng_l2cap_node_debug_ep)) 540 error = EMSGSIZE; 541 else 542 l2cap->debug = 543 *((ng_l2cap_node_debug_ep *)(msg->data)); 544 break; 545 546 /* Get connection list */ 547 case NGM_L2CAP_NODE_GET_CON_LIST: { 548 ng_l2cap_con_p con = NULL; 549 ng_l2cap_node_con_list_ep *e1 = NULL; 550 ng_l2cap_node_con_ep *e2 = NULL; 551 int n = 0; 552 553 /* Count number of connections */ 554 LIST_FOREACH(con, &l2cap->con_list, next) 555 n++; 556 if (n > NG_L2CAP_MAX_CON_NUM) 557 n = NG_L2CAP_MAX_CON_NUM; 558 559 /* Prepare response */ 560 NG_MKRESPONSE(rsp, msg, 561 sizeof(*e1) + n * sizeof(*e2), M_NOWAIT); 562 if (rsp == NULL) { 563 error = ENOMEM; 564 break; 565 } 566 567 e1 = (ng_l2cap_node_con_list_ep *)(rsp->data); 568 e2 = (ng_l2cap_node_con_ep *)(e1 + 1); 569 570 e1->num_connections = n; 571 572 LIST_FOREACH(con, &l2cap->con_list, next) { 573 e2->state = con->state; 574 575 e2->flags = con->flags; 576 if (con->tx_pkt != NULL) 577 e2->flags |= NG_L2CAP_CON_TX; 578 if (con->rx_pkt != NULL) 579 e2->flags |= NG_L2CAP_CON_RX; 580 581 e2->pending = con->pending; 582 583 e2->con_handle = con->con_handle; 584 bcopy(&con->remote, &e2->remote, 585 sizeof(e2->remote)); 586 587 e2 ++; 588 if (--n <= 0) 589 break; 590 } 591 } break; 592 593 /* Get channel list */ 594 case NGM_L2CAP_NODE_GET_CHAN_LIST: { 595 ng_l2cap_chan_p ch = NULL; 596 ng_l2cap_node_chan_list_ep *e1 = NULL; 597 ng_l2cap_node_chan_ep *e2 = NULL; 598 int n = 0; 599 600 /* Count number of channels */ 601 LIST_FOREACH(ch, &l2cap->chan_list, next) 602 n ++; 603 if (n > NG_L2CAP_MAX_CHAN_NUM) 604 n = NG_L2CAP_MAX_CHAN_NUM; 605 606 /* Prepare response */ 607 NG_MKRESPONSE(rsp, msg, 608 sizeof(ng_l2cap_node_chan_list_ep) + 609 n * sizeof(ng_l2cap_node_chan_ep), M_NOWAIT); 610 if (rsp == NULL) { 611 error = ENOMEM; 612 break; 613 } 614 615 e1 = (ng_l2cap_node_chan_list_ep *)(rsp->data); 616 e2 = (ng_l2cap_node_chan_ep *)(e1 + 1); 617 618 e1->num_channels = n; 619 620 LIST_FOREACH(ch, &l2cap->chan_list, next) { 621 e2->state = ch->state; 622 623 e2->scid = ch->scid; 624 e2->dcid = ch->dcid; 625 626 e2->imtu = ch->imtu; 627 e2->omtu = ch->omtu; 628 629 e2->psm = ch->psm; 630 bcopy(&ch->con->remote, &e2->remote, 631 sizeof(e2->remote)); 632 633 e2 ++; 634 if (--n <= 0) 635 break; 636 } 637 } break; 638 639 case NGM_L2CAP_NODE_GET_AUTO_DISCON_TIMO: 640 NG_MKRESPONSE(rsp, msg, 641 sizeof(ng_l2cap_node_auto_discon_ep), M_NOWAIT); 642 if (rsp == NULL) 643 error = ENOMEM; 644 else 645 *((ng_l2cap_node_auto_discon_ep *)(rsp->data)) = 646 l2cap->discon_timo; 647 break; 648 649 case NGM_L2CAP_NODE_SET_AUTO_DISCON_TIMO: 650 if (msg->header.arglen != 651 sizeof(ng_l2cap_node_auto_discon_ep)) 652 error = EMSGSIZE; 653 else 654 l2cap->discon_timo = 655 *((ng_l2cap_node_auto_discon_ep *) 656 (msg->data)); 657 break; 658 659 default: 660 error = EINVAL; 661 break; 662 } 663 break; 664 665 default: 666 error = EINVAL; 667 break; 668 } 669 670 NG_RESPOND_MSG(error, node, item, rsp); 671 NG_FREE_MSG(msg); 672 673 return (error); 674} /* ng_l2cap_rcvmsg */ 675 676/* 677 * Process data packet from one of our hooks. 678 * 679 * From the HCI hook we expect to receive ACL data packets. ACL data packets 680 * gets re-assembled into one L2CAP packet (according to length) and then gets 681 * processed. 682 * 683 * NOTE: We expect to receive L2CAP packet header in the first fragment. 684 * Otherwise we WILL NOT be able to get length of the L2CAP packet. 685 * 686 * Signaling L2CAP packets (destination channel ID == 0x1) are processed within 687 * the node. Connectionless data packets (destination channel ID == 0x2) will 688 * be forwarded to appropriate upstream hook unless it is not connected or 689 * connectionless traffic for the specified PSM was disabled. 690 * 691 * From the upstream hooks we expect to receive data packets. These data 692 * packets will be converted into L2CAP data packets. The length of each 693 * L2CAP packet must not exceed channel's omtu (our peer's imtu). Then 694 * these L2CAP packets will be converted to ACL data packets (according to 695 * HCI layer MTU) and sent to lower layer. 696 * 697 * No data is expected from the control hook. 698 */ 699 700static int 701ng_l2cap_rcvdata(hook_p hook, item_p item) 702{ 703 ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 704 struct mbuf *m = NULL; 705 int error = 0; 706 707 /* Detach mbuf, discard item and process data */ 708 NGI_GET_M(item, m); 709 NG_FREE_ITEM(item); 710 711 if (hook == l2cap->hci) 712 error = ng_l2cap_lp_receive(l2cap, m); 713 else if (hook == l2cap->l2c) 714 error = ng_l2cap_l2ca_write_req(l2cap, m); 715 else { 716 NG_FREE_M(m); 717 error = EINVAL; 718 } 719 720 return (error); 721} /* ng_l2cap_rcvdata */ 722 723/* 724 * Clean all connections, channels and commands for the L2CAP node 725 */ 726 727static void 728ng_l2cap_cleanup(ng_l2cap_p l2cap) 729{ 730 ng_l2cap_con_p con = NULL; 731 732 /* Clean up connection and channels */ 733 while (!LIST_EMPTY(&l2cap->con_list)) { 734 con = LIST_FIRST(&l2cap->con_list); 735 736 if (con->flags & NG_L2CAP_CON_LP_TIMO) 737 ng_l2cap_lp_untimeout(con); 738 else if (con->flags & NG_L2CAP_CON_AUTO_DISCON_TIMO) 739 ng_l2cap_discon_untimeout(con); 740 741 /* Connection terminated by local host */ 742 ng_l2cap_con_fail(con, 0x16); 743 } 744} /* ng_l2cap_cleanup */ 745 746/* 747 * Destroy all channels that use specified upstream hook 748 */ 749 750static void 751ng_l2cap_destroy_channels(ng_l2cap_p l2cap) 752{ 753 while (!LIST_EMPTY(&l2cap->chan_list)) 754 ng_l2cap_free_chan(LIST_FIRST(&l2cap->chan_list)); 755} /* ng_l2cap_destroy_channels_by_hook */ 756 757