sys/netgraph/bluetooth/socket/ng_btsocket_l2cap.c

   1 /*
   2  * ng_btsocket_l2cap.c
   3  */
   4
   5 /*-
   6  * Copyright (c) 2001-2002 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_btsocket_l2cap.c,v 1.16 2003/09/14 23:29:06 max Exp $
  31  * $FreeBSD$
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/bitstring.h>
  37 #include <sys/domain.h>
  38 #include <sys/endian.h>
  39 #include <sys/errno.h>
  40 #include <sys/filedesc.h>
  41 #include <sys/ioccom.h>
  42 #include <sys/kernel.h>
  43 #include <sys/lock.h>
  44 #include <sys/malloc.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/mutex.h>
  47 #include <sys/protosw.h>
  48 #include <sys/queue.h>
  49 #include <sys/socket.h>
  50 #include <sys/socketvar.h>
  51 #include <sys/sysctl.h>
  52 #include <sys/taskqueue.h>
  53
  54 #include <net/vnet.h>
  55
  56 #include <netgraph/ng_message.h>
  57 #include <netgraph/netgraph.h>
  58 #include <netgraph/bluetooth/include/ng_bluetooth.h>
  59 #include <netgraph/bluetooth/include/ng_hci.h>
  60 #include <netgraph/bluetooth/include/ng_l2cap.h>
  61 #include <netgraph/bluetooth/include/ng_btsocket.h>
  62 #include <netgraph/bluetooth/include/ng_btsocket_l2cap.h>
  63
  64 /* MALLOC define */
  65 #ifdef NG_SEPARATE_MALLOC
  66 static MALLOC_DEFINE(M_NETGRAPH_BTSOCKET_L2CAP, "netgraph_btsocks_l2cap",
  67                 "Netgraph Bluetooth L2CAP sockets");
  68 #else
  69 #define M_NETGRAPH_BTSOCKET_L2CAP M_NETGRAPH
  70 #endif /* NG_SEPARATE_MALLOC */
  71
  72 /* Netgraph node methods */
  73 static ng_constructor_t ng_btsocket_l2cap_node_constructor;
  74 static ng_rcvmsg_t      ng_btsocket_l2cap_node_rcvmsg;
  75 static ng_shutdown_t    ng_btsocket_l2cap_node_shutdown;
  76 static ng_newhook_t     ng_btsocket_l2cap_node_newhook;
  77 static ng_connect_t     ng_btsocket_l2cap_node_connect;
  78 static ng_rcvdata_t     ng_btsocket_l2cap_node_rcvdata;
  79 static ng_disconnect_t  ng_btsocket_l2cap_node_disconnect;
  80
  81 static void             ng_btsocket_l2cap_input   (void *, int);
  82 static void             ng_btsocket_l2cap_rtclean (void *, int);
  83
  84 /* Netgraph type descriptor */
  85 static struct ng_type   typestruct = {
  86         .version =      NG_ABI_VERSION,
  87         .name =         NG_BTSOCKET_L2CAP_NODE_TYPE,
  88         .constructor =  ng_btsocket_l2cap_node_constructor,
  89         .rcvmsg =       ng_btsocket_l2cap_node_rcvmsg,
  90         .shutdown =     ng_btsocket_l2cap_node_shutdown,
  91         .newhook =      ng_btsocket_l2cap_node_newhook,
  92         .connect =      ng_btsocket_l2cap_node_connect,
  93         .rcvdata =      ng_btsocket_l2cap_node_rcvdata,
  94         .disconnect =   ng_btsocket_l2cap_node_disconnect,
  95 };
  96
  97 /* Globals */
  98 extern int                                      ifqmaxlen;
  99 static u_int32_t                                ng_btsocket_l2cap_debug_level;
 100 static node_p                                   ng_btsocket_l2cap_node;
 101 static struct ng_bt_itemq                       ng_btsocket_l2cap_queue;
 102 static struct mtx                               ng_btsocket_l2cap_queue_mtx;
 103 static struct task                              ng_btsocket_l2cap_queue_task;
 104 static LIST_HEAD(, ng_btsocket_l2cap_pcb)       ng_btsocket_l2cap_sockets;
 105 static struct mtx                               ng_btsocket_l2cap_sockets_mtx;
 106 static LIST_HEAD(, ng_btsocket_l2cap_rtentry)   ng_btsocket_l2cap_rt;
 107 static struct mtx                               ng_btsocket_l2cap_rt_mtx;
 108 static struct task                              ng_btsocket_l2cap_rt_task;
 109 static struct timeval                           ng_btsocket_l2cap_lasttime;
 110 static int                                      ng_btsocket_l2cap_curpps;
 111
 112 /* Sysctl tree */
 113 SYSCTL_DECL(_net_bluetooth_l2cap_sockets);
 114 static SYSCTL_NODE(_net_bluetooth_l2cap_sockets, OID_AUTO, seq, CTLFLAG_RW,
 115         0, "Bluetooth SEQPACKET L2CAP sockets family");
 116 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, debug_level,
 117         CTLFLAG_RW,
 118         &ng_btsocket_l2cap_debug_level, NG_BTSOCKET_WARN_LEVEL,
 119         "Bluetooth SEQPACKET L2CAP sockets debug level");
 120 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, queue_len,
 121         CTLFLAG_RD,
 122         &ng_btsocket_l2cap_queue.len, 0,
 123         "Bluetooth SEQPACKET L2CAP sockets input queue length");
 124 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, queue_maxlen,
 125         CTLFLAG_RD,
 126         &ng_btsocket_l2cap_queue.maxlen, 0,
 127         "Bluetooth SEQPACKET L2CAP sockets input queue max. length");
 128 SYSCTL_UINT(_net_bluetooth_l2cap_sockets_seq, OID_AUTO, queue_drops,
 129         CTLFLAG_RD,
 130         &ng_btsocket_l2cap_queue.drops, 0,
 131         "Bluetooth SEQPACKET L2CAP sockets input queue drops");
 132
 133 /* Debug */
 134 #define NG_BTSOCKET_L2CAP_INFO \
 135         if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_INFO_LEVEL && \
 136             ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \
 137                 printf
 138
 139 #define NG_BTSOCKET_L2CAP_WARN \
 140         if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_WARN_LEVEL && \
 141             ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \
 142                 printf
 143
 144 #define NG_BTSOCKET_L2CAP_ERR \
 145         if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_ERR_LEVEL && \
 146             ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \
 147                 printf
 148
 149 #define NG_BTSOCKET_L2CAP_ALERT \
 150         if (ng_btsocket_l2cap_debug_level >= NG_BTSOCKET_ALERT_LEVEL && \
 151             ppsratecheck(&ng_btsocket_l2cap_lasttime, &ng_btsocket_l2cap_curpps, 1)) \
 152                 printf
 153
 154 /*
 155  * Netgraph message processing routines
 156  */
 157
 158 static int ng_btsocket_l2cap_process_l2ca_con_req_rsp
 159         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 160 static int ng_btsocket_l2cap_process_l2ca_con_rsp_rsp
 161         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 162 static int ng_btsocket_l2cap_process_l2ca_con_ind
 163         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 164
 165 static int ng_btsocket_l2cap_process_l2ca_cfg_req_rsp
 166         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 167 static int ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp
 168         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 169 static int ng_btsocket_l2cap_process_l2ca_cfg_ind
 170         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 171
 172 static int ng_btsocket_l2cap_process_l2ca_discon_rsp
 173         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 174 static int ng_btsocket_l2cap_process_l2ca_discon_ind
 175         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 176
 177 static int ng_btsocket_l2cap_process_l2ca_write_rsp
 178         (struct ng_mesg *, ng_btsocket_l2cap_rtentry_p);
 179
 180 /*
 181  * Send L2CA_xxx messages to the lower layer
 182  */
 183
 184 static int  ng_btsocket_l2cap_send_l2ca_con_req
 185         (ng_btsocket_l2cap_pcb_p);
 186 static int  ng_btsocket_l2cap_send_l2ca_con_rsp_req
 187         (u_int32_t, ng_btsocket_l2cap_rtentry_p, bdaddr_p, int, int, int);
 188 static int  ng_btsocket_l2cap_send_l2ca_cfg_req
 189         (ng_btsocket_l2cap_pcb_p);
 190 static int  ng_btsocket_l2cap_send_l2ca_cfg_rsp
 191         (ng_btsocket_l2cap_pcb_p);
 192 static int  ng_btsocket_l2cap_send_l2ca_discon_req
 193         (u_int32_t, ng_btsocket_l2cap_pcb_p);
 194
 195 static int ng_btsocket_l2cap_send2
 196         (ng_btsocket_l2cap_pcb_p);
 197
 198 /*
 199  * Timeout processing routines
 200  */
 201
 202 static void ng_btsocket_l2cap_timeout         (ng_btsocket_l2cap_pcb_p);
 203 static void ng_btsocket_l2cap_untimeout       (ng_btsocket_l2cap_pcb_p);
 204 static void ng_btsocket_l2cap_process_timeout (void *);
 205
 206 /*
 207  * Other stuff
 208  */
 209
 210 static ng_btsocket_l2cap_pcb_p     ng_btsocket_l2cap_pcb_by_addr(bdaddr_p, int);
 211 static ng_btsocket_l2cap_pcb_p     ng_btsocket_l2cap_pcb_by_token(u_int32_t);
 212 static ng_btsocket_l2cap_pcb_p     ng_btsocket_l2cap_pcb_by_cid (bdaddr_p, int);
 213 static int                         ng_btsocket_l2cap_result2errno(int);
 214
 215 #define ng_btsocket_l2cap_wakeup_input_task() \
 216         taskqueue_enqueue(taskqueue_swi_giant, &ng_btsocket_l2cap_queue_task)
 217
 218 #define ng_btsocket_l2cap_wakeup_route_task() \
 219         taskqueue_enqueue(taskqueue_swi_giant, &ng_btsocket_l2cap_rt_task)
 220
 221 /*****************************************************************************
 222  *****************************************************************************
 223  **                        Netgraph node interface
 224  *****************************************************************************
 225  *****************************************************************************/
 226
 227 /*
 228  * Netgraph node constructor. Do not allow to create node of this type.
 229  */
 230
 231 static int
 232 ng_btsocket_l2cap_node_constructor(node_p node)
 233 {
 234         return (EINVAL);
 235 } /* ng_btsocket_l2cap_node_constructor */
 236
 237 /*
 238  * Do local shutdown processing. Let old node go and create new fresh one.
 239  */
 240
 241 static int
 242 ng_btsocket_l2cap_node_shutdown(node_p node)
 243 {
 244         int     error = 0;
 245
 246         NG_NODE_UNREF(node);
 247
 248         /* Create new node */
 249         error = ng_make_node_common(&typestruct, &ng_btsocket_l2cap_node);
 250         if (error != 0) {
 251                 NG_BTSOCKET_L2CAP_ALERT(
 252 "%s: Could not create Netgraph node, error=%d\n", __func__, error);
 253
 254                 ng_btsocket_l2cap_node = NULL;
 255
 256                 return (error);
 257         }
 258
 259         error = ng_name_node(ng_btsocket_l2cap_node,
 260                                 NG_BTSOCKET_L2CAP_NODE_TYPE);
 261         if (error != 0) {
 262                 NG_BTSOCKET_L2CAP_ALERT(
 263 "%s: Could not name Netgraph node, error=%d\n", __func__, error);
 264
 265                 NG_NODE_UNREF(ng_btsocket_l2cap_node);
 266                 ng_btsocket_l2cap_node = NULL;
 267
 268                 return (error);
 269         }
 270
 271         return (0);
 272 } /* ng_btsocket_l2cap_node_shutdown */
 273
 274 /*
 275  * We allow any hook to be connected to the node.
 276  */
 277
 278 static int
 279 ng_btsocket_l2cap_node_newhook(node_p node, hook_p hook, char const *name)
 280 {
 281         return (0);
 282 } /* ng_btsocket_l2cap_node_newhook */
 283
 284 /*
 285  * Just say "YEP, that's OK by me!"
 286  */
 287
 288 static int
 289 ng_btsocket_l2cap_node_connect(hook_p hook)
 290 {
 291         NG_HOOK_SET_PRIVATE(hook, NULL);
 292         NG_HOOK_REF(hook); /* Keep extra reference to the hook */
 293
 294 #if 0
 295         NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
 296         NG_HOOK_FORCE_QUEUE(hook);
 297 #endif
 298
 299         return (0);
 300 } /* ng_btsocket_l2cap_node_connect */
 301
 302 /*
 303  * Hook disconnection. Schedule route cleanup task
 304  */
 305
 306 static int
 307 ng_btsocket_l2cap_node_disconnect(hook_p hook)
 308 {
 309         /*
 310          * If hook has private information than we must have this hook in
 311          * the routing table and must schedule cleaning for the routing table.
 312          * Otherwise hook was connected but we never got "hook_info" message,
 313          * so we have never added this hook to the routing table and it save
 314          * to just delete it.
 315          */
 316
 317         if (NG_HOOK_PRIVATE(hook) != NULL)
 318                 return (ng_btsocket_l2cap_wakeup_route_task());
 319
 320         NG_HOOK_UNREF(hook); /* Remove extra reference */
 321
 322         return (0);
 323 } /* ng_btsocket_l2cap_node_disconnect */
 324
 325 /*
 326  * Process incoming messages
 327  */
 328
 329 static int
 330 ng_btsocket_l2cap_node_rcvmsg(node_p node, item_p item, hook_p hook)
 331 {
 332         struct ng_mesg  *msg = NGI_MSG(item); /* item still has message */
 333         int              error = 0;
 334
 335         if (msg != NULL && msg->header.typecookie == NGM_L2CAP_COOKIE) {
 336                 mtx_lock(&ng_btsocket_l2cap_queue_mtx);
 337                 if (NG_BT_ITEMQ_FULL(&ng_btsocket_l2cap_queue)) {
 338                         NG_BTSOCKET_L2CAP_ERR(
 339 "%s: Input queue is full (msg)\n", __func__);
 340
 341                         NG_BT_ITEMQ_DROP(&ng_btsocket_l2cap_queue);
 342                         NG_FREE_ITEM(item);
 343                         error = ENOBUFS;
 344                 } else {
 345                         if (hook != NULL) {
 346                                 NG_HOOK_REF(hook);
 347                                 NGI_SET_HOOK(item, hook);
 348                         }
 349
 350                         NG_BT_ITEMQ_ENQUEUE(&ng_btsocket_l2cap_queue, item);
 351                         error = ng_btsocket_l2cap_wakeup_input_task();
 352                 }
 353                 mtx_unlock(&ng_btsocket_l2cap_queue_mtx);
 354         } else {
 355                 NG_FREE_ITEM(item);
 356                 error = EINVAL;
 357         }
 358
 359         return (error);
 360 } /* ng_btsocket_l2cap_node_rcvmsg */
 361
 362 /*
 363  * Receive data on a hook
 364  */
 365
 366 static int
 367 ng_btsocket_l2cap_node_rcvdata(hook_p hook, item_p item)
 368 {
 369         int     error = 0;
 370
 371         mtx_lock(&ng_btsocket_l2cap_queue_mtx);
 372         if (NG_BT_ITEMQ_FULL(&ng_btsocket_l2cap_queue)) {
 373                 NG_BTSOCKET_L2CAP_ERR(
 374 "%s: Input queue is full (data)\n", __func__);
 375
 376                 NG_BT_ITEMQ_DROP(&ng_btsocket_l2cap_queue);
 377                 NG_FREE_ITEM(item);
 378                 error = ENOBUFS;
 379         } else {
 380                 NG_HOOK_REF(hook);
 381                 NGI_SET_HOOK(item, hook);
 382
 383                 NG_BT_ITEMQ_ENQUEUE(&ng_btsocket_l2cap_queue, item);
 384                 error = ng_btsocket_l2cap_wakeup_input_task();
 385         }
 386         mtx_unlock(&ng_btsocket_l2cap_queue_mtx);
 387
 388         return (error);
 389 } /* ng_btsocket_l2cap_node_rcvdata */
 390
 391 /*
 392  * Process L2CA_Connect respose. Socket layer must have initiated connection,
 393  * so we have to have a socket associated with message token.
 394  */
 395
 396 static int
 397 ng_btsocket_l2cap_process_l2ca_con_req_rsp(struct ng_mesg *msg,
 398                 ng_btsocket_l2cap_rtentry_p rt)
 399 {
 400         ng_l2cap_l2ca_con_op    *op = NULL;
 401         ng_btsocket_l2cap_pcb_t *pcb = NULL;
 402         int                      error = 0;
 403
 404         if (msg->header.arglen != sizeof(*op))
 405                 return (EMSGSIZE);
 406
 407         op = (ng_l2cap_l2ca_con_op *)(msg->data);
 408
 409         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
 410
 411         /* Look for the socket with the token */
 412         pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token);
 413         if (pcb == NULL) {
 414                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 415                 return (ENOENT);
 416         }
 417
 418         mtx_lock(&pcb->pcb_mtx);
 419
 420         NG_BTSOCKET_L2CAP_INFO(
 421 "%s: Got L2CA_Connect response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \
 422 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, status=%d, " \
 423 "state=%d\n",   __func__, msg->header.token,
 424                 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
 425                 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
 426                 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
 427                 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
 428                 pcb->psm, op->lcid, op->result, op->status,
 429                 pcb->state);
 430
 431         if (pcb->state != NG_BTSOCKET_L2CAP_CONNECTING) {
 432                 mtx_unlock(&pcb->pcb_mtx);
 433                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 434
 435                 return (ENOENT);
 436         }
 437
 438         ng_btsocket_l2cap_untimeout(pcb);
 439
 440         if (op->result == NG_L2CAP_PENDING) {
 441                 ng_btsocket_l2cap_timeout(pcb);
 442                 mtx_unlock(&pcb->pcb_mtx);
 443                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 444
 445                 return (0);
 446         }
 447
 448         if (op->result == NG_L2CAP_SUCCESS) {
 449                 /*
 450                  * Channel is now open, so update local channel ID and
 451                  * start configuration process. Source and destination
 452                  * addresses as well as route must be already set.
 453                  */
 454
 455                 pcb->cid = op->lcid;
 456
 457                 error = ng_btsocket_l2cap_send_l2ca_cfg_req(pcb);
 458                 if (error != 0) {
 459                         /* Send disconnect request with "zero" token */
 460                         ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb);
 461
 462                         /* ... and close the socket */
 463                         pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
 464                         soisdisconnected(pcb->so);
 465                 } else {
 466                         pcb->cfg_state = NG_BTSOCKET_L2CAP_CFG_IN_SENT;
 467                         pcb->state = NG_BTSOCKET_L2CAP_CONFIGURING;
 468
 469                         ng_btsocket_l2cap_timeout(pcb);
 470                 }
 471         } else {
 472                 /*
 473                  * We have failed to open connection, so convert result
 474                  * code to "errno" code and disconnect the socket. Channel
 475                  * already has been closed.
 476                  */
 477
 478                 pcb->so->so_error = ng_btsocket_l2cap_result2errno(op->result);
 479                 pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
 480                 soisdisconnected(pcb->so);
 481         }
 482
 483         mtx_unlock(&pcb->pcb_mtx);
 484         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 485
 486         return (error);
 487 } /* ng_btsocket_l2cap_process_l2ca_con_req_rsp */
 488
 489 /*
 490  * Process L2CA_ConnectRsp response
 491  */
 492
 493 static int
 494 ng_btsocket_l2cap_process_l2ca_con_rsp_rsp(struct ng_mesg *msg,
 495                 ng_btsocket_l2cap_rtentry_p rt)
 496 {
 497         ng_l2cap_l2ca_con_rsp_op        *op = NULL;
 498         ng_btsocket_l2cap_pcb_t         *pcb = NULL;
 499
 500         if (msg->header.arglen != sizeof(*op))
 501                 return (EMSGSIZE);
 502
 503         op = (ng_l2cap_l2ca_con_rsp_op *)(msg->data);
 504
 505         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
 506
 507         /* Look for the socket with the token */
 508         pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token);
 509         if (pcb == NULL) {
 510                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 511                 return (ENOENT);
 512         }
 513
 514         mtx_lock(&pcb->pcb_mtx);
 515
 516         NG_BTSOCKET_L2CAP_INFO(
 517 "%s: Got L2CA_ConnectRsp response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \
 518 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d\n",
 519                 __func__, msg->header.token,
 520                 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
 521                 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
 522                 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
 523                 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
 524                 pcb->psm, pcb->cid, op->result, pcb->state);
 525
 526         if (pcb->state != NG_BTSOCKET_L2CAP_CONNECTING) {
 527                 mtx_unlock(&pcb->pcb_mtx);
 528                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 529
 530                 return (ENOENT);
 531         }
 532
 533         ng_btsocket_l2cap_untimeout(pcb);
 534
 535         /* Check the result and disconnect the socket on failure */
 536         if (op->result != NG_L2CAP_SUCCESS) {
 537                 /* Close the socket - channel already closed */
 538                 pcb->so->so_error = ng_btsocket_l2cap_result2errno(op->result);
 539                 pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
 540                 soisdisconnected(pcb->so);
 541         } else {
 542                 /* Move to CONFIGURING state and wait for CONFIG_IND */
 543                 pcb->cfg_state = 0;
 544                 pcb->state = NG_BTSOCKET_L2CAP_CONFIGURING;
 545                 ng_btsocket_l2cap_timeout(pcb);
 546         }
 547
 548         mtx_unlock(&pcb->pcb_mtx);
 549         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 550
 551         return (0);
 552 } /* ng_btsocket_process_l2ca_con_rsp_rsp */
 553
 554 /*
 555  * Process L2CA_Connect indicator. Find socket that listens on address
 556  * and PSM. Find exact or closest match. Create new socket and initiate
 557  * connection.
 558  */
 559
 560 static int
 561 ng_btsocket_l2cap_process_l2ca_con_ind(struct ng_mesg *msg,
 562                 ng_btsocket_l2cap_rtentry_p rt)
 563 {
 564         ng_l2cap_l2ca_con_ind_ip        *ip = NULL;
 565         ng_btsocket_l2cap_pcb_t         *pcb = NULL, *pcb1 = NULL;
 566         int                              error = 0;
 567         u_int32_t                        token = 0;
 568         u_int16_t                        result = 0;
 569
 570         if (msg->header.arglen != sizeof(*ip))
 571                 return (EMSGSIZE);
 572
 573         ip = (ng_l2cap_l2ca_con_ind_ip *)(msg->data);
 574
 575         NG_BTSOCKET_L2CAP_INFO(
 576 "%s: Got L2CA_Connect indicator, src bdaddr=%x:%x:%x:%x:%x:%x, " \
 577 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, ident=%d\n",
 578                 __func__,
 579                 rt->src.b[5], rt->src.b[4], rt->src.b[3],
 580                 rt->src.b[2], rt->src.b[1], rt->src.b[0],
 581                 ip->bdaddr.b[5], ip->bdaddr.b[4], ip->bdaddr.b[3],
 582                 ip->bdaddr.b[2], ip->bdaddr.b[1], ip->bdaddr.b[0],
 583                 ip->psm, ip->lcid, ip->ident);
 584
 585         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
 586
 587         pcb = ng_btsocket_l2cap_pcb_by_addr(&rt->src, ip->psm);
 588         if (pcb != NULL) {
 589                 struct socket   *so1 = NULL;
 590
 591                 mtx_lock(&pcb->pcb_mtx);
 592
 593                 /*
 594                  * First check the pending connections queue and if we have
 595                  * space then create new socket and set proper source address.
 596                  */
 597
 598                 if (pcb->so->so_qlen <= pcb->so->so_qlimit) {
 599                         CURVNET_SET(pcb->so->so_vnet);
 600                         so1 = sonewconn(pcb->so, 0);
 601                         CURVNET_RESTORE();
 602                 }
 603
 604                 if (so1 == NULL) {
 605                         result = NG_L2CAP_NO_RESOURCES;
 606                         goto respond;
 607                 }
 608
 609                 /*
 610                  * If we got here than we have created new socket. So complete
 611                  * connection. If we we listening on specific address then copy
 612                  * source address from listening socket, otherwise copy source
 613                  * address from hook's routing information.
 614                  */
 615
 616                 pcb1 = so2l2cap_pcb(so1);
 617                 KASSERT((pcb1 != NULL),
 618 ("%s: pcb1 == NULL\n", __func__));
 619
 620                 mtx_lock(&pcb1->pcb_mtx);
 621
 622                 if (bcmp(&pcb->src, NG_HCI_BDADDR_ANY, sizeof(pcb->src)) != 0)
 623                         bcopy(&pcb->src, &pcb1->src, sizeof(pcb1->src));
 624                 else
 625                         bcopy(&rt->src, &pcb1->src, sizeof(pcb1->src));
 626
 627                 pcb1->flags &= ~NG_BTSOCKET_L2CAP_CLIENT;
 628
 629                 bcopy(&ip->bdaddr, &pcb1->dst, sizeof(pcb1->dst));
 630                 pcb1->psm = ip->psm;
 631                 pcb1->cid = ip->lcid;
 632                 pcb1->rt = rt;
 633
 634                 /* Copy socket settings */
 635                 pcb1->imtu = pcb->imtu;
 636                 bcopy(&pcb->oflow, &pcb1->oflow, sizeof(pcb1->oflow));
 637                 pcb1->flush_timo = pcb->flush_timo;
 638
 639                 token = pcb1->token;
 640         } else
 641                 /* Nobody listens on requested BDADDR/PSM */
 642                 result = NG_L2CAP_PSM_NOT_SUPPORTED;
 643
 644 respond:
 645         error = ng_btsocket_l2cap_send_l2ca_con_rsp_req(token, rt,
 646                         &ip->bdaddr, ip->ident, ip->lcid, result);
 647         if (pcb1 != NULL) {
 648                 if (error != 0) {
 649                         pcb1->so->so_error = error;
 650                         pcb1->state = NG_BTSOCKET_L2CAP_CLOSED;
 651                         soisdisconnected(pcb1->so);
 652                 } else {
 653                         pcb1->state = NG_BTSOCKET_L2CAP_CONNECTING;
 654                         soisconnecting(pcb1->so);
 655
 656                         ng_btsocket_l2cap_timeout(pcb1);
 657                 }
 658
 659                 mtx_unlock(&pcb1->pcb_mtx);
 660         }
 661
 662         if (pcb != NULL)
 663                 mtx_unlock(&pcb->pcb_mtx);
 664
 665         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 666
 667         return (error);
 668 } /* ng_btsocket_l2cap_process_l2ca_con_ind */
 669
 670 /*
 671  * Process L2CA_Config response
 672  */
 673
 674 static int
 675 ng_btsocket_l2cap_process_l2ca_cfg_req_rsp(struct ng_mesg *msg,
 676                 ng_btsocket_l2cap_rtentry_p rt)
 677 {
 678         ng_l2cap_l2ca_cfg_op    *op = NULL;
 679         ng_btsocket_l2cap_pcb_p  pcb = NULL;
 680
 681         if (msg->header.arglen != sizeof(*op))
 682                 return (EMSGSIZE);
 683
 684         op = (ng_l2cap_l2ca_cfg_op *)(msg->data);
 685
 686         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
 687
 688         /*
 689          * Socket must have issued a Configure request, so we must have a
 690          * socket that wants to be configured. Use Netgraph message token
 691          * to find it
 692          */
 693
 694         pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token);
 695         if (pcb == NULL) {
 696                 /*
 697                  * XXX FIXME what to do here? We could not find a
 698                  * socket with requested token. We even can not send
 699                  * Disconnect, because we do not know channel ID
 700                  */
 701
 702                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 703                 return (ENOENT);
 704         }
 705
 706         mtx_lock(&pcb->pcb_mtx);
 707
 708         NG_BTSOCKET_L2CAP_INFO(
 709 "%s: Got L2CA_Config response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \
 710 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d, " \
 711 "cfg_state=%x\n",
 712                 __func__, msg->header.token,
 713                 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
 714                 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
 715                 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
 716                 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
 717                 pcb->psm, pcb->cid, op->result, pcb->state, pcb->cfg_state);
 718
 719         if (pcb->state != NG_BTSOCKET_L2CAP_CONFIGURING) {
 720                 mtx_unlock(&pcb->pcb_mtx);
 721                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 722
 723                 return (ENOENT);
 724         }
 725
 726         if (op->result == NG_L2CAP_SUCCESS) {
 727                 /*
 728                  * XXX FIXME Actually set flush and link timeout.
 729                  * Set QoS here if required. Resolve conficts (flush_timo).
 730                  * Save incoming MTU (peer's outgoing MTU) and outgoing flow
 731                  * spec.
 732                  */
 733
 734                 pcb->imtu = op->imtu;
 735                 bcopy(&op->oflow, &pcb->oflow, sizeof(pcb->oflow));
 736                 pcb->flush_timo = op->flush_timo;
 737
 738                 /*
 739                  * We have configured incoming side, so record it and check
 740                  * if configuration is complete. If complete then mark socket
 741                  * as connected, otherwise wait for the peer.
 742                  */
 743
 744                 pcb->cfg_state &= ~NG_BTSOCKET_L2CAP_CFG_IN_SENT;
 745                 pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_IN;
 746
 747                 if (pcb->cfg_state == NG_BTSOCKET_L2CAP_CFG_BOTH) {
 748                         /* Configuration complete - mark socket as open */
 749                         ng_btsocket_l2cap_untimeout(pcb);
 750                         pcb->state = NG_BTSOCKET_L2CAP_OPEN;
 751                         soisconnected(pcb->so);
 752                 }
 753         } else {
 754                 /*
 755                  * Something went wrong. Could be unacceptable parameters,
 756                  * reject or unknown option. That's too bad, but we will
 757                  * not negotiate. Send Disconnect and close the channel.
 758                  */
 759
 760                 ng_btsocket_l2cap_untimeout(pcb);
 761
 762                 switch (op->result) {
 763                 case NG_L2CAP_UNACCEPTABLE_PARAMS:
 764                 case NG_L2CAP_UNKNOWN_OPTION:
 765                         pcb->so->so_error = EINVAL;
 766                         break;
 767
 768                 default:
 769                         pcb->so->so_error = ECONNRESET;
 770                         break;
 771                 }
 772
 773                 /* Send disconnect with "zero" token */
 774                 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb);
 775
 776                 /* ... and close the socket */
 777                 pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
 778                 soisdisconnected(pcb->so);
 779         }
 780
 781         mtx_unlock(&pcb->pcb_mtx);
 782         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 783
 784         return (0);
 785 } /* ng_btsocket_l2cap_process_l2ca_cfg_req_rsp */
 786
 787 /*
 788  * Process L2CA_ConfigRsp response
 789  */
 790
 791 static int
 792 ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp(struct ng_mesg *msg,
 793                 ng_btsocket_l2cap_rtentry_p rt)
 794 {
 795         ng_l2cap_l2ca_cfg_rsp_op        *op = NULL;
 796         ng_btsocket_l2cap_pcb_t         *pcb = NULL;
 797         int                              error = 0;
 798
 799         if (msg->header.arglen != sizeof(*op))
 800                 return (EMSGSIZE);
 801
 802         op = (ng_l2cap_l2ca_cfg_rsp_op *)(msg->data);
 803
 804         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
 805
 806         /* Look for the socket with the token */
 807         pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token);
 808         if (pcb == NULL) {
 809                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 810                 return (ENOENT);
 811         }
 812
 813         mtx_lock(&pcb->pcb_mtx);
 814
 815         NG_BTSOCKET_L2CAP_INFO(
 816 "%s: Got L2CA_ConfigRsp response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \
 817 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d, " \
 818 "cfg_state=%x\n",
 819                 __func__, msg->header.token,
 820                 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
 821                 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
 822                 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
 823                 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
 824                 pcb->psm, pcb->cid, op->result, pcb->state, pcb->cfg_state);
 825
 826         if (pcb->state != NG_BTSOCKET_L2CAP_CONFIGURING) {
 827                 mtx_unlock(&pcb->pcb_mtx);
 828                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 829
 830                 return (ENOENT);
 831         }
 832
 833         /* Check the result and disconnect socket of failure */
 834         if (op->result != NG_L2CAP_SUCCESS)
 835                 goto disconnect;
 836
 837         /*
 838          * Now we done with remote side configuration. Configure local
 839          * side if we have not done it yet.
 840          */
 841
 842         pcb->cfg_state &= ~NG_BTSOCKET_L2CAP_CFG_OUT_SENT;
 843         pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_OUT;
 844
 845         if (pcb->cfg_state == NG_BTSOCKET_L2CAP_CFG_BOTH) {
 846                 /* Configuration complete - mask socket as open */
 847                 ng_btsocket_l2cap_untimeout(pcb);
 848                 pcb->state = NG_BTSOCKET_L2CAP_OPEN;
 849                 soisconnected(pcb->so);
 850         } else {
 851                 if (!(pcb->cfg_state & NG_BTSOCKET_L2CAP_CFG_IN_SENT)) {
 852                         /* Send L2CA_Config request - incoming path */
 853                         error = ng_btsocket_l2cap_send_l2ca_cfg_req(pcb);
 854                         if (error != 0)
 855                                 goto disconnect;
 856
 857                         pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_IN_SENT;
 858                 }
 859         }
 860
 861         mtx_unlock(&pcb->pcb_mtx);
 862         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 863
 864         return (error);
 865
 866 disconnect:
 867         ng_btsocket_l2cap_untimeout(pcb);
 868
 869         /* Send disconnect with "zero" token */
 870         ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb);
 871
 872         /* ... and close the socket */
 873         pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
 874         soisdisconnected(pcb->so);
 875
 876         mtx_unlock(&pcb->pcb_mtx);
 877         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 878
 879         return (error);
 880 } /* ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp */
 881
 882 /*
 883  * Process L2CA_Config indicator
 884  */
 885
 886 static int
 887 ng_btsocket_l2cap_process_l2ca_cfg_ind(struct ng_mesg *msg,
 888                 ng_btsocket_l2cap_rtentry_p rt)
 889 {
 890         ng_l2cap_l2ca_cfg_ind_ip        *ip = NULL;
 891         ng_btsocket_l2cap_pcb_t         *pcb = NULL;
 892         int                              error = 0;
 893
 894         if (msg->header.arglen != sizeof(*ip))
 895                 return (EMSGSIZE);
 896
 897         ip = (ng_l2cap_l2ca_cfg_ind_ip *)(msg->data);
 898
 899         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
 900
 901         /* Check for the open socket that has given channel ID */
 902         pcb = ng_btsocket_l2cap_pcb_by_cid(&rt->src, ip->lcid);
 903         if (pcb == NULL) {
 904                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 905                 return (ENOENT);
 906         }
 907
 908         mtx_lock(&pcb->pcb_mtx);
 909
 910         NG_BTSOCKET_L2CAP_INFO(
 911 "%s: Got L2CA_Config indicator, src bdaddr=%x:%x:%x:%x:%x:%x, " \
 912 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, state=%d, cfg_state=%x\n",
 913                 __func__,
 914                 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
 915                 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
 916                 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
 917                 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
 918                 pcb->psm, pcb->cid, pcb->state, pcb->cfg_state);
 919
 920         /* XXX FIXME re-configuration on open socket */
 921         if (pcb->state != NG_BTSOCKET_L2CAP_CONFIGURING) {
 922                 mtx_unlock(&pcb->pcb_mtx);
 923                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 924
 925                 return (ENOENT);
 926         }
 927
 928         /*
 929          * XXX FIXME Actually set flush and link timeout. Set QoS here if
 930          * required. Resolve conficts (flush_timo). Note outgoing MTU (peer's
 931          * incoming MTU) and incoming flow spec.
 932          */
 933
 934         pcb->omtu = ip->omtu;
 935         bcopy(&ip->iflow, &pcb->iflow, sizeof(pcb->iflow));
 936         pcb->flush_timo = ip->flush_timo;
 937
 938         /*
 939          * Send L2CA_Config response to our peer and check for the errors,
 940          * if any send disconnect to close the channel.
 941          */
 942
 943         if (!(pcb->cfg_state & NG_BTSOCKET_L2CAP_CFG_OUT_SENT)) {
 944                 error = ng_btsocket_l2cap_send_l2ca_cfg_rsp(pcb);
 945                 if (error != 0) {
 946                         ng_btsocket_l2cap_untimeout(pcb);
 947
 948                         pcb->so->so_error = error;
 949
 950                         /* Send disconnect with "zero" token */
 951                         ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb);
 952
 953                         /* ... and close the socket */
 954                         pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
 955                         soisdisconnected(pcb->so);
 956                 } else
 957                         pcb->cfg_state |= NG_BTSOCKET_L2CAP_CFG_OUT_SENT;
 958         }
 959
 960         mtx_unlock(&pcb->pcb_mtx);
 961         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 962
 963         return (error);
 964 } /* ng_btsocket_l2cap_process_l2cap_cfg_ind */
 965
 966 /*
 967  * Process L2CA_Disconnect response
 968  */
 969
 970 static int
 971 ng_btsocket_l2cap_process_l2ca_discon_rsp(struct ng_mesg *msg,
 972                 ng_btsocket_l2cap_rtentry_p rt)
 973 {
 974         ng_l2cap_l2ca_discon_op *op = NULL;
 975         ng_btsocket_l2cap_pcb_t *pcb = NULL;
 976
 977         /* Check message */
 978         if (msg->header.arglen != sizeof(*op))
 979                 return (EMSGSIZE);
 980
 981         op = (ng_l2cap_l2ca_discon_op *)(msg->data);
 982
 983         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
 984
 985         /*
 986          * Socket layer must have issued L2CA_Disconnect request, so there
 987          * must be a socket that wants to be disconnected. Use Netgraph
 988          * message token to find it.
 989          */
 990
 991         pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token);
 992         if (pcb == NULL) {
 993                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
 994                 return (0);
 995         }
 996
 997         mtx_lock(&pcb->pcb_mtx);
 998
 999         /* XXX Close socket no matter what op->result says */
1000         if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED) {
1001                 NG_BTSOCKET_L2CAP_INFO(
1002 "%s: Got L2CA_Disconnect response, token=%d, src bdaddr=%x:%x:%x:%x:%x:%x, " \
1003 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, state=%d\n",
1004                         __func__, msg->header.token,
1005                         pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
1006                         pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
1007                         pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
1008                         pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
1009                         pcb->psm, pcb->cid, op->result, pcb->state);
1010
1011                 ng_btsocket_l2cap_untimeout(pcb);
1012
1013                 pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
1014                 soisdisconnected(pcb->so);
1015         }
1016
1017         mtx_unlock(&pcb->pcb_mtx);
1018         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1019
1020         return (0);
1021 } /* ng_btsocket_l2cap_process_l2ca_discon_rsp */
1022
1023 /*
1024  * Process L2CA_Disconnect indicator
1025  */
1026
1027 static int
1028 ng_btsocket_l2cap_process_l2ca_discon_ind(struct ng_mesg *msg,
1029                 ng_btsocket_l2cap_rtentry_p rt)
1030 {
1031         ng_l2cap_l2ca_discon_ind_ip     *ip = NULL;
1032         ng_btsocket_l2cap_pcb_t         *pcb = NULL;
1033
1034         /* Check message */
1035         if (msg->header.arglen != sizeof(*ip))
1036                 return (EMSGSIZE);
1037
1038         ip = (ng_l2cap_l2ca_discon_ind_ip *)(msg->data);
1039
1040         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
1041
1042         /* Look for the socket with given channel ID */
1043         pcb = ng_btsocket_l2cap_pcb_by_cid(&rt->src, ip->lcid);
1044         if (pcb == NULL) {
1045                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1046                 return (0);
1047         }
1048
1049         /*
1050          * Channel has already been destroyed, so disconnect the socket
1051          * and be done with it. If there was any pending request we can
1052          * not do anything here anyway.
1053          */
1054
1055         mtx_lock(&pcb->pcb_mtx);
1056
1057         NG_BTSOCKET_L2CAP_INFO(
1058 "%s: Got L2CA_Disconnect indicator, src bdaddr=%x:%x:%x:%x:%x:%x, " \
1059 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, state=%d\n",
1060                 __func__,
1061                 pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
1062                 pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
1063                 pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
1064                 pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
1065                 pcb->psm, pcb->cid, pcb->state);
1066
1067         if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO)
1068                 ng_btsocket_l2cap_untimeout(pcb);
1069
1070         pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
1071         soisdisconnected(pcb->so);
1072
1073         mtx_unlock(&pcb->pcb_mtx);
1074         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1075
1076         return (0);
1077 } /* ng_btsocket_l2cap_process_l2ca_discon_ind */
1078
1079 /*
1080  * Process L2CA_Write response
1081  */
1082
1083 static int
1084 ng_btsocket_l2cap_process_l2ca_write_rsp(struct ng_mesg *msg,
1085                 ng_btsocket_l2cap_rtentry_p rt)
1086 {
1087         ng_l2cap_l2ca_write_op  *op = NULL;
1088         ng_btsocket_l2cap_pcb_t *pcb = NULL;
1089
1090         /* Check message */
1091         if (msg->header.arglen != sizeof(*op))
1092                 return (EMSGSIZE);
1093
1094         op = (ng_l2cap_l2ca_write_op *)(msg->data);
1095
1096         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
1097
1098         /* Look for the socket with given token */
1099         pcb = ng_btsocket_l2cap_pcb_by_token(msg->header.token);
1100         if (pcb == NULL) {
1101                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1102                 return (ENOENT);
1103         }
1104
1105         mtx_lock(&pcb->pcb_mtx);
1106
1107         NG_BTSOCKET_L2CAP_INFO(
1108 "%s: Got L2CA_Write response, src bdaddr=%x:%x:%x:%x:%x:%x, " \
1109 "dst bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, lcid=%d, result=%d, length=%d, " \
1110 "state=%d\n",           __func__,
1111                         pcb->src.b[5], pcb->src.b[4], pcb->src.b[3],
1112                         pcb->src.b[2], pcb->src.b[1], pcb->src.b[0],
1113                         pcb->dst.b[5], pcb->dst.b[4], pcb->dst.b[3],
1114                         pcb->dst.b[2], pcb->dst.b[1], pcb->dst.b[0],
1115                         pcb->psm, pcb->cid, op->result, op->length,
1116                         pcb->state);
1117
1118         if (pcb->state != NG_BTSOCKET_L2CAP_OPEN) {
1119                 mtx_unlock(&pcb->pcb_mtx);
1120                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1121
1122                 return (ENOENT);
1123         }
1124
1125         ng_btsocket_l2cap_untimeout(pcb);
1126
1127         /*
1128          * Check if we have more data to send
1129          */
1130
1131         sbdroprecord(&pcb->so->so_snd);
1132         if (pcb->so->so_snd.sb_cc > 0) {
1133                 if (ng_btsocket_l2cap_send2(pcb) == 0)
1134                         ng_btsocket_l2cap_timeout(pcb);
1135                 else
1136                         sbdroprecord(&pcb->so->so_snd); /* XXX */
1137         }
1138
1139         /*
1140          * Now set the result, drop packet from the socket send queue and
1141          * ask for more (wakeup sender)
1142          */
1143
1144         pcb->so->so_error = ng_btsocket_l2cap_result2errno(op->result);
1145         sowwakeup(pcb->so);
1146
1147         mtx_unlock(&pcb->pcb_mtx);
1148         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1149
1150         return (0);
1151 } /* ng_btsocket_l2cap_process_l2ca_write_rsp */
1152
1153 /*
1154  * Send L2CA_Connect request
1155  */
1156
1157 static int
1158 ng_btsocket_l2cap_send_l2ca_con_req(ng_btsocket_l2cap_pcb_p pcb)
1159 {
1160         struct ng_mesg          *msg = NULL;
1161         ng_l2cap_l2ca_con_ip    *ip = NULL;
1162         int                      error = 0;
1163
1164         mtx_assert(&pcb->pcb_mtx, MA_OWNED);
1165
1166         if (pcb->rt == NULL ||
1167             pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook))
1168                 return (ENETDOWN);
1169
1170         NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CON,
1171                 sizeof(*ip), M_NOWAIT);
1172         if (msg == NULL)
1173                 return (ENOMEM);
1174
1175         msg->header.token = pcb->token;
1176
1177         ip = (ng_l2cap_l2ca_con_ip *)(msg->data);
1178         bcopy(&pcb->dst, &ip->bdaddr, sizeof(ip->bdaddr));
1179         ip->psm = pcb->psm;
1180
1181         NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg,pcb->rt->hook, 0);
1182
1183         return (error);
1184 } /* ng_btsocket_l2cap_send_l2ca_con_req */
1185
1186 /*
1187  * Send L2CA_Connect response
1188  */
1189
1190 static int
1191 ng_btsocket_l2cap_send_l2ca_con_rsp_req(u_int32_t token,
1192                 ng_btsocket_l2cap_rtentry_p rt, bdaddr_p dst, int ident,
1193                 int lcid, int result)
1194 {
1195         struct ng_mesg                  *msg = NULL;
1196         ng_l2cap_l2ca_con_rsp_ip        *ip = NULL;
1197         int                              error = 0;
1198
1199         if (rt == NULL || rt->hook == NULL || NG_HOOK_NOT_VALID(rt->hook))
1200                 return (ENETDOWN);
1201
1202         NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CON_RSP,
1203                 sizeof(*ip), M_NOWAIT);
1204         if (msg == NULL)
1205                 return (ENOMEM);
1206
1207         msg->header.token = token;
1208
1209         ip = (ng_l2cap_l2ca_con_rsp_ip *)(msg->data);
1210         bcopy(dst, &ip->bdaddr, sizeof(ip->bdaddr));
1211         ip->ident = ident;
1212         ip->lcid = lcid;
1213         ip->result = result;
1214         ip->status = 0;
1215
1216         NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg, rt->hook, 0);
1217
1218         return (error);
1219 } /* ng_btsocket_l2cap_send_l2ca_con_rsp_req */
1220
1221 /*
1222  * Send L2CA_Config request
1223  */
1224
1225 static int
1226 ng_btsocket_l2cap_send_l2ca_cfg_req(ng_btsocket_l2cap_pcb_p pcb)
1227 {
1228         struct ng_mesg          *msg = NULL;
1229         ng_l2cap_l2ca_cfg_ip    *ip = NULL;
1230         int                      error = 0;
1231
1232         mtx_assert(&pcb->pcb_mtx, MA_OWNED);
1233
1234         if (pcb->rt == NULL ||
1235             pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook))
1236                 return (ENETDOWN);
1237
1238         NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CFG,
1239                 sizeof(*ip), M_NOWAIT);
1240         if (msg == NULL)
1241                 return (ENOMEM);
1242
1243         msg->header.token = pcb->token;
1244
1245         ip = (ng_l2cap_l2ca_cfg_ip *)(msg->data);
1246         ip->lcid = pcb->cid;
1247         ip->imtu = pcb->imtu;
1248         bcopy(&pcb->oflow, &ip->oflow, sizeof(ip->oflow));
1249         ip->flush_timo = pcb->flush_timo;
1250         ip->link_timo = pcb->link_timo;
1251
1252         NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg,pcb->rt->hook, 0);
1253
1254         return (error);
1255 } /* ng_btsocket_l2cap_send_l2ca_cfg_req */
1256
1257 /*
1258  * Send L2CA_Config response
1259  */
1260
1261 static int
1262 ng_btsocket_l2cap_send_l2ca_cfg_rsp(ng_btsocket_l2cap_pcb_p pcb)
1263 {
1264         struct ng_mesg                  *msg = NULL;
1265         ng_l2cap_l2ca_cfg_rsp_ip        *ip = NULL;
1266         int                              error = 0;
1267
1268         mtx_assert(&pcb->pcb_mtx, MA_OWNED);
1269
1270         if (pcb->rt == NULL ||
1271             pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook))
1272                 return (ENETDOWN);
1273
1274         NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_CFG_RSP,
1275                 sizeof(*ip), M_NOWAIT);
1276         if (msg == NULL)
1277                 return (ENOMEM);
1278
1279         msg->header.token = pcb->token;
1280
1281         ip = (ng_l2cap_l2ca_cfg_rsp_ip *)(msg->data);
1282         ip->lcid = pcb->cid;
1283         ip->omtu = pcb->omtu;
1284         bcopy(&pcb->iflow, &ip->iflow, sizeof(ip->iflow));
1285
1286         NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg, pcb->rt->hook, 0);
1287
1288         return (error);
1289 } /* ng_btsocket_l2cap_send_l2ca_cfg_rsp */
1290
1291 /*
1292  * Send L2CA_Disconnect request
1293  */
1294
1295 static int
1296 ng_btsocket_l2cap_send_l2ca_discon_req(u_int32_t token,
1297                 ng_btsocket_l2cap_pcb_p pcb)
1298 {
1299         struct ng_mesg          *msg = NULL;
1300         ng_l2cap_l2ca_discon_ip *ip = NULL;
1301         int                      error = 0;
1302
1303         mtx_assert(&pcb->pcb_mtx, MA_OWNED);
1304
1305         if (pcb->rt == NULL ||
1306             pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook))
1307                 return (ENETDOWN);
1308
1309         NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_L2CA_DISCON,
1310                 sizeof(*ip), M_NOWAIT);
1311         if (msg == NULL)
1312                 return (ENOMEM);
1313
1314         msg->header.token = token;
1315
1316         ip = (ng_l2cap_l2ca_discon_ip *)(msg->data);
1317         ip->lcid = pcb->cid;
1318
1319         NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_node, msg,pcb->rt->hook, 0);
1320
1321         return (error);
1322 } /* ng_btsocket_l2cap_send_l2ca_discon_req */
1323
1324 /*****************************************************************************
1325  *****************************************************************************
1326  **                              Socket interface
1327  *****************************************************************************
1328  *****************************************************************************/
1329
1330 /*
1331  * L2CAP sockets data input routine
1332  */
1333
1334 static void
1335 ng_btsocket_l2cap_data_input(struct mbuf *m, hook_p hook)
1336 {
1337         ng_l2cap_hdr_t                  *hdr = NULL;
1338         ng_l2cap_clt_hdr_t              *clt_hdr = NULL;
1339         ng_btsocket_l2cap_pcb_t         *pcb = NULL;
1340         ng_btsocket_l2cap_rtentry_t     *rt = NULL;
1341
1342         if (hook == NULL) {
1343                 NG_BTSOCKET_L2CAP_ALERT(
1344 "%s: Invalid source hook for L2CAP data packet\n", __func__);
1345                 goto drop;
1346         }
1347
1348         rt = (ng_btsocket_l2cap_rtentry_t *) NG_HOOK_PRIVATE(hook);
1349         if (rt == NULL) {
1350                 NG_BTSOCKET_L2CAP_ALERT(
1351 "%s: Could not find out source bdaddr for L2CAP data packet\n", __func__);
1352                 goto drop;
1353         }
1354
1355         /* Make sure we can access header */
1356         if (m->m_pkthdr.len < sizeof(*hdr)) {
1357                 NG_BTSOCKET_L2CAP_ERR(
1358 "%s: L2CAP data packet too small, len=%d\n", __func__, m->m_pkthdr.len);
1359                 goto drop;
1360         }
1361
1362         if (m->m_len < sizeof(*hdr)) {
1363                 m = m_pullup(m, sizeof(*hdr));
1364                 if (m == NULL)
1365                         goto drop;
1366         }
1367
1368         /* Strip L2CAP packet header and verify packet length */
1369         hdr = mtod(m, ng_l2cap_hdr_t *);
1370         m_adj(m, sizeof(*hdr));
1371
1372         if (hdr->length != m->m_pkthdr.len) {
1373                 NG_BTSOCKET_L2CAP_ERR(
1374 "%s: Bad L2CAP data packet length, len=%d, length=%d\n",
1375                         __func__, m->m_pkthdr.len, hdr->length);
1376                 goto drop;
1377         }
1378
1379         /*
1380          * Now process packet. Two cases:
1381          *
1382          * 1) Normal packet (cid != 2) then find connected socket and append
1383          *    mbuf to the socket queue. Wakeup socket.
1384          *
1385          * 2) Broadcast packet (cid == 2) then find all sockets that connected
1386          *    to the given PSM and have SO_BROADCAST bit set and append mbuf
1387          *    to the socket queue. Wakeup socket.
1388          */
1389
1390         NG_BTSOCKET_L2CAP_INFO(
1391 "%s: Received L2CAP data packet: src bdaddr=%x:%x:%x:%x:%x:%x, " \
1392 "dcid=%d, length=%d\n",
1393                 __func__,
1394                 rt->src.b[5], rt->src.b[4], rt->src.b[3],
1395                 rt->src.b[2], rt->src.b[1], rt->src.b[0],
1396                 hdr->dcid, hdr->length);
1397
1398         if (hdr->dcid >= NG_L2CAP_FIRST_CID) {
1399
1400                 mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
1401
1402                 /* Normal packet: find connected socket */
1403                 pcb = ng_btsocket_l2cap_pcb_by_cid(&rt->src, hdr->dcid);
1404                 if (pcb == NULL) {
1405                         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1406                         goto drop;
1407                 }
1408
1409                 mtx_lock(&pcb->pcb_mtx);
1410
1411                 if (pcb->state != NG_BTSOCKET_L2CAP_OPEN) {
1412                         NG_BTSOCKET_L2CAP_ERR(
1413 "%s: No connected socket found, src bdaddr=%x:%x:%x:%x:%x:%x, dcid=%d, " \
1414 "state=%d\n",                   __func__,
1415                                 rt->src.b[5], rt->src.b[4], rt->src.b[3],
1416                                 rt->src.b[2], rt->src.b[1], rt->src.b[0],
1417                                 hdr->dcid, pcb->state);
1418
1419                         mtx_unlock(&pcb->pcb_mtx);
1420                         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1421                         goto drop;
1422                 }
1423
1424                 /* Check packet size against socket's incoming MTU */
1425                 if (hdr->length > pcb->imtu) {
1426                         NG_BTSOCKET_L2CAP_ERR(
1427 "%s: L2CAP data packet too big, src bdaddr=%x:%x:%x:%x:%x:%x, " \
1428 "dcid=%d, length=%d, imtu=%d\n",
1429                                 __func__,
1430                                 rt->src.b[5], rt->src.b[4], rt->src.b[3],
1431                                 rt->src.b[2], rt->src.b[1], rt->src.b[0],
1432                                 hdr->dcid, hdr->length, pcb->imtu);
1433
1434                         mtx_unlock(&pcb->pcb_mtx);
1435                         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1436                         goto drop;
1437                 }
1438
1439                 /* Check if we have enough space in socket receive queue */
1440                 if (m->m_pkthdr.len > sbspace(&pcb->so->so_rcv)) {
1441
1442                         /*
1443                          * This is really bad. Receive queue on socket does
1444                          * not have enough space for the packet. We do not
1445                          * have any other choice but drop the packet. L2CAP
1446                          * does not provide any flow control.
1447                          */
1448
1449                         NG_BTSOCKET_L2CAP_ERR(
1450 "%s: Not enough space in socket receive queue. Dropping L2CAP data packet, " \
1451 "src bdaddr=%x:%x:%x:%x:%x:%x, dcid=%d, len=%d, space=%ld\n",
1452                                 __func__,
1453                                 rt->src.b[5], rt->src.b[4], rt->src.b[3],
1454                                 rt->src.b[2], rt->src.b[1], rt->src.b[0],
1455                                 hdr->dcid, m->m_pkthdr.len,
1456                                 sbspace(&pcb->so->so_rcv));
1457
1458                         mtx_unlock(&pcb->pcb_mtx);
1459                         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1460                         goto drop;
1461                 }
1462
1463                 /* Append packet to the socket receive queue and wakeup */
1464                 sbappendrecord(&pcb->so->so_rcv, m);
1465                 m = NULL;
1466
1467                 sorwakeup(pcb->so);
1468
1469                 mtx_unlock(&pcb->pcb_mtx);
1470                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1471         } else if (hdr->dcid == NG_L2CAP_CLT_CID) {
1472                 /* Broadcast packet: give packet to all sockets  */
1473
1474                 /* Check packet size against connectionless MTU */
1475                 if (hdr->length > NG_L2CAP_MTU_DEFAULT) {
1476                         NG_BTSOCKET_L2CAP_ERR(
1477 "%s: Connectionless L2CAP data packet too big, " \
1478 "src bdaddr=%x:%x:%x:%x:%x:%x, length=%d\n",
1479                                 __func__,
1480                                 rt->src.b[5], rt->src.b[4], rt->src.b[3],
1481                                 rt->src.b[2], rt->src.b[1], rt->src.b[0],
1482                                 hdr->length);
1483                         goto drop;
1484                 }
1485
1486                 /* Make sure we can access connectionless header */
1487                 if (m->m_pkthdr.len < sizeof(*clt_hdr)) {
1488                         NG_BTSOCKET_L2CAP_ERR(
1489 "%s: Can not get L2CAP connectionless packet header, " \
1490 "src bdaddr=%x:%x:%x:%x:%x:%x, length=%d\n",
1491                                 __func__,
1492                                 rt->src.b[5], rt->src.b[4], rt->src.b[3],
1493                                 rt->src.b[2], rt->src.b[1], rt->src.b[0],
1494                                 hdr->length);
1495                         goto drop;
1496                 }
1497
1498                 if (m->m_len < sizeof(*clt_hdr)) {
1499                         m = m_pullup(m, sizeof(*clt_hdr));
1500                         if (m == NULL)
1501                                 goto drop;
1502                 }
1503
1504                 /* Strip connectionless header and deliver packet */
1505                 clt_hdr = mtod(m, ng_l2cap_clt_hdr_t *);
1506                 m_adj(m, sizeof(*clt_hdr));
1507
1508                 NG_BTSOCKET_L2CAP_INFO(
1509 "%s: Got L2CAP connectionless data packet, " \
1510 "src bdaddr=%x:%x:%x:%x:%x:%x, psm=%d, length=%d\n",
1511                         __func__,
1512                         rt->src.b[5], rt->src.b[4], rt->src.b[3],
1513                         rt->src.b[2], rt->src.b[1], rt->src.b[0],
1514                         clt_hdr->psm, hdr->length);
1515
1516                 mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
1517
1518                 LIST_FOREACH(pcb, &ng_btsocket_l2cap_sockets, next) {
1519                         struct mbuf     *copy = NULL;
1520
1521                         mtx_lock(&pcb->pcb_mtx);
1522
1523                         if (bcmp(&rt->src, &pcb->src, sizeof(pcb->src)) != 0 ||
1524                             pcb->psm != clt_hdr->psm ||
1525                             pcb->state != NG_BTSOCKET_L2CAP_OPEN ||
1526                             (pcb->so->so_options & SO_BROADCAST) == 0 ||
1527                             m->m_pkthdr.len > sbspace(&pcb->so->so_rcv))
1528                                 goto next;
1529
1530                         /*
1531                          * Create a copy of the packet and append it to the
1532                          * socket's queue. If m_dup() failed - no big deal
1533                          * it is a broadcast traffic after all
1534                          */
1535
1536                         copy = m_dup(m, M_NOWAIT);
1537                         if (copy != NULL) {
1538                                 sbappendrecord(&pcb->so->so_rcv, copy);
1539                                 sorwakeup(pcb->so);
1540                         }
1541 next:
1542                         mtx_unlock(&pcb->pcb_mtx);
1543                 }
1544
1545                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1546         }
1547 drop:
1548         NG_FREE_M(m); /* checks for m != NULL */
1549 } /* ng_btsocket_l2cap_data_input */
1550
1551 /*
1552  * L2CAP sockets default message input routine
1553  */
1554
1555 static void
1556 ng_btsocket_l2cap_default_msg_input(struct ng_mesg *msg, hook_p hook)
1557 {
1558         switch (msg->header.cmd) {
1559         case NGM_L2CAP_NODE_HOOK_INFO: {
1560                 ng_btsocket_l2cap_rtentry_t     *rt = NULL;
1561
1562                 if (hook == NULL || msg->header.arglen != sizeof(bdaddr_t))
1563                         break;
1564
1565                 if (bcmp(msg->data, NG_HCI_BDADDR_ANY, sizeof(bdaddr_t)) == 0)
1566                         break;
1567
1568                 mtx_lock(&ng_btsocket_l2cap_rt_mtx);
1569
1570                 rt = (ng_btsocket_l2cap_rtentry_t *) NG_HOOK_PRIVATE(hook);
1571                 if (rt == NULL) {
1572                         rt = malloc(sizeof(*rt),
1573                                 M_NETGRAPH_BTSOCKET_L2CAP, M_NOWAIT|M_ZERO);
1574                         if (rt == NULL) {
1575                                 mtx_unlock(&ng_btsocket_l2cap_rt_mtx);
1576                                 break;
1577                         }
1578
1579                         LIST_INSERT_HEAD(&ng_btsocket_l2cap_rt, rt, next);
1580
1581                         NG_HOOK_SET_PRIVATE(hook, rt);
1582                 }
1583
1584                 bcopy(msg->data, &rt->src, sizeof(rt->src));
1585                 rt->hook = hook;
1586
1587                 mtx_unlock(&ng_btsocket_l2cap_rt_mtx);
1588
1589                 NG_BTSOCKET_L2CAP_INFO(
1590 "%s: Updating hook \"%s\", src bdaddr=%x:%x:%x:%x:%x:%x\n",
1591                         __func__, NG_HOOK_NAME(hook),
1592                         rt->src.b[5], rt->src.b[4], rt->src.b[3],
1593                         rt->src.b[2], rt->src.b[1], rt->src.b[0]);
1594                 } break;
1595
1596         default:
1597                 NG_BTSOCKET_L2CAP_WARN(
1598 "%s: Unknown message, cmd=%d\n", __func__, msg->header.cmd);
1599                 break;
1600         }
1601
1602         NG_FREE_MSG(msg); /* Checks for msg != NULL */
1603 } /* ng_btsocket_l2cap_default_msg_input */
1604
1605 /*
1606  * L2CAP sockets L2CA message input routine
1607  */
1608
1609 static void
1610 ng_btsocket_l2cap_l2ca_msg_input(struct ng_mesg *msg, hook_p hook)
1611 {
1612         ng_btsocket_l2cap_rtentry_p     rt = NULL;
1613
1614         if (hook == NULL) {
1615                 NG_BTSOCKET_L2CAP_ALERT(
1616 "%s: Invalid source hook for L2CA message\n", __func__);
1617                 goto drop;
1618         }
1619
1620         rt = (ng_btsocket_l2cap_rtentry_p) NG_HOOK_PRIVATE(hook);
1621         if (rt == NULL) {
1622                 NG_BTSOCKET_L2CAP_ALERT(
1623 "%s: Could not find out source bdaddr for L2CA message\n", __func__);
1624                 goto drop;
1625         }
1626
1627         switch (msg->header.cmd) {
1628         case NGM_L2CAP_L2CA_CON: /* L2CA_Connect response */
1629                 ng_btsocket_l2cap_process_l2ca_con_req_rsp(msg, rt);
1630                 break;
1631
1632         case NGM_L2CAP_L2CA_CON_RSP: /* L2CA_ConnectRsp response */
1633                 ng_btsocket_l2cap_process_l2ca_con_rsp_rsp(msg, rt);
1634                 break;
1635
1636         case NGM_L2CAP_L2CA_CON_IND: /* L2CA_Connect indicator */
1637                 ng_btsocket_l2cap_process_l2ca_con_ind(msg, rt);
1638                 break;
1639
1640         case NGM_L2CAP_L2CA_CFG: /* L2CA_Config response */
1641                 ng_btsocket_l2cap_process_l2ca_cfg_req_rsp(msg, rt);
1642                 break;
1643
1644         case NGM_L2CAP_L2CA_CFG_RSP: /* L2CA_ConfigRsp response */
1645                 ng_btsocket_l2cap_process_l2ca_cfg_rsp_rsp(msg, rt);
1646                 break;
1647
1648         case NGM_L2CAP_L2CA_CFG_IND: /* L2CA_Config indicator */
1649                 ng_btsocket_l2cap_process_l2ca_cfg_ind(msg, rt);
1650                 break;
1651
1652         case NGM_L2CAP_L2CA_DISCON: /* L2CA_Disconnect response */
1653                 ng_btsocket_l2cap_process_l2ca_discon_rsp(msg, rt);
1654                 break;
1655
1656         case NGM_L2CAP_L2CA_DISCON_IND: /* L2CA_Disconnect indicator */
1657                 ng_btsocket_l2cap_process_l2ca_discon_ind(msg, rt);
1658                 break;
1659
1660         case NGM_L2CAP_L2CA_WRITE: /* L2CA_Write response */
1661                 ng_btsocket_l2cap_process_l2ca_write_rsp(msg, rt);
1662                 break;
1663
1664         /* XXX FIXME add other L2CA messages */
1665
1666         default:
1667                 NG_BTSOCKET_L2CAP_WARN(
1668 "%s: Unknown L2CA message, cmd=%d\n", __func__, msg->header.cmd);
1669                 break;
1670         }
1671 drop:
1672         NG_FREE_MSG(msg);
1673 } /* ng_btsocket_l2cap_l2ca_msg_input */
1674
1675 /*
1676  * L2CAP sockets input routine
1677  */
1678
1679 static void
1680 ng_btsocket_l2cap_input(void *context, int pending)
1681 {
1682         item_p  item = NULL;
1683         hook_p  hook = NULL;
1684
1685         for (;;) {
1686                 mtx_lock(&ng_btsocket_l2cap_queue_mtx);
1687                 NG_BT_ITEMQ_DEQUEUE(&ng_btsocket_l2cap_queue, item);
1688                 mtx_unlock(&ng_btsocket_l2cap_queue_mtx);
1689
1690                 if (item == NULL)
1691                         break;
1692
1693                 NGI_GET_HOOK(item, hook);
1694                 if (hook != NULL && NG_HOOK_NOT_VALID(hook))
1695                         goto drop;
1696
1697                 switch(item->el_flags & NGQF_TYPE) {
1698                 case NGQF_DATA: {
1699                         struct mbuf     *m = NULL;
1700
1701                         NGI_GET_M(item, m);
1702                         ng_btsocket_l2cap_data_input(m, hook);
1703                         } break;
1704
1705                 case NGQF_MESG: {
1706                         struct ng_mesg  *msg = NULL;
1707
1708                         NGI_GET_MSG(item, msg);
1709
1710                         switch (msg->header.cmd) {
1711                         case NGM_L2CAP_L2CA_CON:
1712                         case NGM_L2CAP_L2CA_CON_RSP:
1713                         case NGM_L2CAP_L2CA_CON_IND:
1714                         case NGM_L2CAP_L2CA_CFG:
1715                         case NGM_L2CAP_L2CA_CFG_RSP:
1716                         case NGM_L2CAP_L2CA_CFG_IND:
1717                         case NGM_L2CAP_L2CA_DISCON:
1718                         case NGM_L2CAP_L2CA_DISCON_IND:
1719                         case NGM_L2CAP_L2CA_WRITE:
1720                         /* XXX FIXME add other L2CA messages */
1721                                 ng_btsocket_l2cap_l2ca_msg_input(msg, hook);
1722                                 break;
1723
1724                         default:
1725                                 ng_btsocket_l2cap_default_msg_input(msg, hook);
1726                                 break;
1727                         }
1728                         } break;
1729
1730                 default:
1731                         KASSERT(0,
1732 ("%s: invalid item type=%ld\n", __func__, (item->el_flags & NGQF_TYPE)));
1733                         break;
1734                 }
1735 drop:
1736                 if (hook != NULL)
1737                         NG_HOOK_UNREF(hook);
1738
1739                 NG_FREE_ITEM(item);
1740         }
1741 } /* ng_btsocket_l2cap_input */
1742
1743 /*
1744  * Route cleanup task. Gets scheduled when hook is disconnected. Here we
1745  * will find all sockets that use "invalid" hook and disconnect them.
1746  */
1747
1748 static void
1749 ng_btsocket_l2cap_rtclean(void *context, int pending)
1750 {
1751         ng_btsocket_l2cap_pcb_p         pcb = NULL, pcb_next = NULL;
1752         ng_btsocket_l2cap_rtentry_p     rt = NULL;
1753
1754         mtx_lock(&ng_btsocket_l2cap_rt_mtx);
1755         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
1756
1757         /*
1758          * First disconnect all sockets that use "invalid" hook
1759          */
1760
1761         for (pcb = LIST_FIRST(&ng_btsocket_l2cap_sockets); pcb != NULL; ) {
1762                 mtx_lock(&pcb->pcb_mtx);
1763                 pcb_next = LIST_NEXT(pcb, next);
1764
1765                 if (pcb->rt != NULL &&
1766                     pcb->rt->hook != NULL && NG_HOOK_NOT_VALID(pcb->rt->hook)) {
1767                         if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO)
1768                                 ng_btsocket_l2cap_untimeout(pcb);
1769
1770                         pcb->so->so_error = ENETDOWN;
1771                         pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
1772                         soisdisconnected(pcb->so);
1773
1774                         pcb->token = 0;
1775                         pcb->cid = 0;
1776                         pcb->rt = NULL;
1777                 }
1778
1779                 mtx_unlock(&pcb->pcb_mtx);
1780                 pcb = pcb_next;
1781         }
1782
1783         /*
1784          * Now cleanup routing table
1785          */
1786
1787         for (rt = LIST_FIRST(&ng_btsocket_l2cap_rt); rt != NULL; ) {
1788                 ng_btsocket_l2cap_rtentry_p     rt_next = LIST_NEXT(rt, next);
1789
1790                 if (rt->hook != NULL && NG_HOOK_NOT_VALID(rt->hook)) {
1791                         LIST_REMOVE(rt, next);
1792
1793                         NG_HOOK_SET_PRIVATE(rt->hook, NULL);
1794                         NG_HOOK_UNREF(rt->hook); /* Remove extra reference */
1795
1796                         bzero(rt, sizeof(*rt));
1797                         free(rt, M_NETGRAPH_BTSOCKET_L2CAP);
1798                 }
1799
1800                 rt = rt_next;
1801         }
1802
1803         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
1804         mtx_unlock(&ng_btsocket_l2cap_rt_mtx);
1805 } /* ng_btsocket_l2cap_rtclean */
1806
1807 /*
1808  * Initialize everything
1809  */
1810
1811 void
1812 ng_btsocket_l2cap_init(void)
1813 {
1814         int     error = 0;
1815
1816         ng_btsocket_l2cap_node = NULL;
1817         ng_btsocket_l2cap_debug_level = NG_BTSOCKET_WARN_LEVEL;
1818
1819         /* Register Netgraph node type */
1820         error = ng_newtype(&typestruct);
1821         if (error != 0) {
1822                 NG_BTSOCKET_L2CAP_ALERT(
1823 "%s: Could not register Netgraph node type, error=%d\n", __func__, error);
1824
1825                 return;
1826         }
1827
1828         /* Create Netgrapg node */
1829         error = ng_make_node_common(&typestruct, &ng_btsocket_l2cap_node);
1830         if (error != 0) {
1831                 NG_BTSOCKET_L2CAP_ALERT(
1832 "%s: Could not create Netgraph node, error=%d\n", __func__, error);
1833
1834                 ng_btsocket_l2cap_node = NULL;
1835
1836                 return;
1837         }
1838
1839         error = ng_name_node(ng_btsocket_l2cap_node,
1840                                 NG_BTSOCKET_L2CAP_NODE_TYPE);
1841         if (error != 0) {
1842                 NG_BTSOCKET_L2CAP_ALERT(
1843 "%s: Could not name Netgraph node, error=%d\n", __func__, error);
1844
1845                 NG_NODE_UNREF(ng_btsocket_l2cap_node);
1846                 ng_btsocket_l2cap_node = NULL;
1847
1848                 return;
1849         }
1850
1851         /* Create input queue */
1852         NG_BT_ITEMQ_INIT(&ng_btsocket_l2cap_queue, ifqmaxlen);
1853         mtx_init(&ng_btsocket_l2cap_queue_mtx,
1854                 "btsocks_l2cap_queue_mtx", NULL, MTX_DEF);
1855         TASK_INIT(&ng_btsocket_l2cap_queue_task, 0,
1856                 ng_btsocket_l2cap_input, NULL);
1857
1858         /* Create list of sockets */
1859         LIST_INIT(&ng_btsocket_l2cap_sockets);
1860         mtx_init(&ng_btsocket_l2cap_sockets_mtx,
1861                 "btsocks_l2cap_sockets_mtx", NULL, MTX_DEF);
1862
1863         /* Routing table */
1864         LIST_INIT(&ng_btsocket_l2cap_rt);
1865         mtx_init(&ng_btsocket_l2cap_rt_mtx,
1866                 "btsocks_l2cap_rt_mtx", NULL, MTX_DEF);
1867         TASK_INIT(&ng_btsocket_l2cap_rt_task, 0,
1868                 ng_btsocket_l2cap_rtclean, NULL);
1869 } /* ng_btsocket_l2cap_init */
1870
1871 /*
1872  * Abort connection on socket
1873  */
1874
1875 void
1876 ng_btsocket_l2cap_abort(struct socket *so)
1877 {
1878         so->so_error = ECONNABORTED;
1879
1880         (void)ng_btsocket_l2cap_disconnect(so);
1881 } /* ng_btsocket_l2cap_abort */
1882
1883 void
1884 ng_btsocket_l2cap_close(struct socket *so)
1885 {
1886
1887         (void)ng_btsocket_l2cap_disconnect(so);
1888 } /* ng_btsocket_l2cap_close */
1889
1890 /*
1891  * Accept connection on socket. Nothing to do here, socket must be connected
1892  * and ready, so just return peer address and be done with it.
1893  */
1894
1895 int
1896 ng_btsocket_l2cap_accept(struct socket *so, struct sockaddr **nam)
1897 {
1898         if (ng_btsocket_l2cap_node == NULL)
1899                 return (EINVAL);
1900
1901         return (ng_btsocket_l2cap_peeraddr(so, nam));
1902 } /* ng_btsocket_l2cap_accept */
1903
1904 /*
1905  * Create and attach new socket
1906  */
1907
1908 int
1909 ng_btsocket_l2cap_attach(struct socket *so, int proto, struct thread *td)
1910 {
1911         static u_int32_t        token = 0;
1912         ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so);
1913         int                     error;
1914
1915         /* Check socket and protocol */
1916         if (ng_btsocket_l2cap_node == NULL)
1917                 return (EPROTONOSUPPORT);
1918         if (so->so_type != SOCK_SEQPACKET)
1919                 return (ESOCKTNOSUPPORT);
1920
1921 #if 0 /* XXX sonewconn() calls "pru_attach" with proto == 0 */
1922         if (proto != 0)
1923                 if (proto != BLUETOOTH_PROTO_L2CAP)
1924                         return (EPROTONOSUPPORT);
1925 #endif /* XXX */
1926
1927         if (pcb != NULL)
1928                 return (EISCONN);
1929
1930         /* Reserve send and receive space if it is not reserved yet */
1931         if ((so->so_snd.sb_hiwat == 0) || (so->so_rcv.sb_hiwat == 0)) {
1932                 error = soreserve(so, NG_BTSOCKET_L2CAP_SENDSPACE,
1933                                         NG_BTSOCKET_L2CAP_RECVSPACE);
1934                 if (error != 0)
1935                         return (error);
1936         }
1937
1938         /* Allocate the PCB */
1939         pcb = malloc(sizeof(*pcb),
1940                 M_NETGRAPH_BTSOCKET_L2CAP, M_NOWAIT | M_ZERO);
1941         if (pcb == NULL)
1942                 return (ENOMEM);
1943
1944         /* Link the PCB and the socket */
1945         so->so_pcb = (caddr_t) pcb;
1946         pcb->so = so;
1947         pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
1948
1949         /* Initialize PCB */
1950         pcb->imtu = pcb->omtu = NG_L2CAP_MTU_DEFAULT;
1951
1952         /* Default flow */
1953         pcb->iflow.flags = 0x0;
1954         pcb->iflow.service_type = NG_HCI_SERVICE_TYPE_BEST_EFFORT;
1955         pcb->iflow.token_rate = 0xffffffff; /* maximum */
1956         pcb->iflow.token_bucket_size = 0xffffffff; /* maximum */
1957         pcb->iflow.peak_bandwidth = 0x00000000; /* maximum */
1958         pcb->iflow.latency = 0xffffffff; /* don't care */
1959         pcb->iflow.delay_variation = 0xffffffff; /* don't care */
1960
1961         bcopy(&pcb->iflow, &pcb->oflow, sizeof(pcb->oflow));
1962
1963         pcb->flush_timo = NG_L2CAP_FLUSH_TIMO_DEFAULT;
1964         pcb->link_timo = NG_L2CAP_LINK_TIMO_DEFAULT;
1965
1966         callout_handle_init(&pcb->timo);
1967
1968         /*
1969          * XXX Mark PCB mutex as DUPOK to prevent "duplicated lock of
1970          * the same type" message. When accepting new L2CAP connection
1971          * ng_btsocket_l2cap_process_l2ca_con_ind() holds both PCB mutexes
1972          * for "old" (accepting) PCB and "new" (created) PCB.
1973          */
1974
1975         mtx_init(&pcb->pcb_mtx, "btsocks_l2cap_pcb_mtx", NULL,
1976                 MTX_DEF|MTX_DUPOK);
1977
1978         /*
1979          * Add the PCB to the list
1980          *
1981          * XXX FIXME VERY IMPORTANT!
1982          *
1983          * This is totally FUBAR. We could get here in two cases:
1984          *
1985          * 1) When user calls socket()
1986          * 2) When we need to accept new incomming connection and call
1987          *    sonewconn()
1988          *
1989          * In the first case we must acquire ng_btsocket_l2cap_sockets_mtx.
1990          * In the second case we hold ng_btsocket_l2cap_sockets_mtx already.
1991          * So we now need to distinguish between these cases. From reading
1992          * /sys/kern/uipc_socket.c we can find out that sonewconn() calls
1993          * pru_attach with proto == 0 and td == NULL. For now use this fact
1994          * to figure out if we were called from socket() or from sonewconn().
1995          */
1996
1997         if (td != NULL)
1998                 mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
1999         else
2000                 mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED);
2001
2002         /* Set PCB token. Use ng_btsocket_l2cap_sockets_mtx for protection */
2003         if (++ token == 0)
2004                 token ++;
2005
2006         pcb->token = token;
2007
2008         LIST_INSERT_HEAD(&ng_btsocket_l2cap_sockets, pcb, next);
2009
2010         if (td != NULL)
2011                 mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
2012
2013         return (0);
2014 } /* ng_btsocket_l2cap_attach */
2015
2016 /*
2017  * Bind socket
2018  */
2019
2020 int
2021 ng_btsocket_l2cap_bind(struct socket *so, struct sockaddr *nam,
2022                 struct thread *td)
2023 {
2024         ng_btsocket_l2cap_pcb_t *pcb = NULL;
2025         struct sockaddr_l2cap   *sa = (struct sockaddr_l2cap *) nam;
2026         int                      psm, error = 0;
2027
2028         if (ng_btsocket_l2cap_node == NULL)
2029                 return (EINVAL);
2030
2031         /* Verify address */
2032         if (sa == NULL)
2033                 return (EINVAL);
2034         if (sa->l2cap_family != AF_BLUETOOTH)
2035                 return (EAFNOSUPPORT);
2036         if (sa->l2cap_len != sizeof(*sa))
2037                 return (EINVAL);
2038
2039         psm = le16toh(sa->l2cap_psm);
2040
2041         /*
2042          * Check if other socket has this address already (look for exact
2043          * match PSM and bdaddr) and assign socket address if it's available.
2044          *
2045          * Note: socket can be bound to ANY PSM (zero) thus allowing several
2046          * channels with the same PSM between the same pair of BD_ADDR'es.
2047          */
2048
2049         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
2050
2051         LIST_FOREACH(pcb, &ng_btsocket_l2cap_sockets, next)
2052                 if (psm != 0 && psm == pcb->psm &&
2053                     bcmp(&pcb->src, &sa->l2cap_bdaddr, sizeof(bdaddr_t)) == 0)
2054                         break;
2055
2056         if (pcb == NULL) {
2057                 /* Set socket address */
2058                 pcb = so2l2cap_pcb(so);
2059                 if (pcb != NULL) {
2060                         bcopy(&sa->l2cap_bdaddr, &pcb->src, sizeof(pcb->src));
2061                         pcb->psm = psm;
2062                 } else
2063                         error = EINVAL;
2064         } else
2065                 error = EADDRINUSE;
2066
2067         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
2068
2069         return (error);
2070 } /* ng_btsocket_l2cap_bind */
2071
2072 /*
2073  * Connect socket
2074  */
2075
2076 int
2077 ng_btsocket_l2cap_connect(struct socket *so, struct sockaddr *nam,
2078                 struct thread *td)
2079 {
2080         ng_btsocket_l2cap_pcb_t         *pcb = so2l2cap_pcb(so);
2081         struct sockaddr_l2cap           *sa = (struct sockaddr_l2cap *) nam;
2082         ng_btsocket_l2cap_rtentry_t     *rt = NULL;
2083         int                              have_src, error = 0;
2084
2085         /* Check socket */
2086         if (pcb == NULL)
2087                 return (EINVAL);
2088         if (ng_btsocket_l2cap_node == NULL)
2089                 return (EINVAL);
2090         if (pcb->state == NG_BTSOCKET_L2CAP_CONNECTING)
2091                 return (EINPROGRESS);
2092
2093         /* Verify address */
2094         if (sa == NULL)
2095                 return (EINVAL);
2096         if (sa->l2cap_family != AF_BLUETOOTH)
2097                 return (EAFNOSUPPORT);
2098         if (sa->l2cap_len != sizeof(*sa))
2099                 return (EINVAL);
2100         if (sa->l2cap_psm == 0 ||
2101             bcmp(&sa->l2cap_bdaddr, NG_HCI_BDADDR_ANY, sizeof(bdaddr_t)) == 0)
2102                 return (EDESTADDRREQ);
2103         if (pcb->psm != 0 && pcb->psm != le16toh(sa->l2cap_psm))
2104                 return (EINVAL);
2105
2106         /*
2107          * Routing. Socket should be bound to some source address. The source
2108          * address can be ANY. Destination address must be set and it must not
2109          * be ANY. If source address is ANY then find first rtentry that has
2110          * src != dst.
2111          */
2112
2113         mtx_lock(&ng_btsocket_l2cap_rt_mtx);
2114         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
2115         mtx_lock(&pcb->pcb_mtx);
2116
2117         /* Send destination address and PSM */
2118         bcopy(&sa->l2cap_bdaddr, &pcb->dst, sizeof(pcb->dst));
2119         pcb->psm = le16toh(sa->l2cap_psm);
2120
2121         pcb->rt = NULL;
2122         have_src = bcmp(&pcb->src, NG_HCI_BDADDR_ANY, sizeof(pcb->src));
2123
2124         LIST_FOREACH(rt, &ng_btsocket_l2cap_rt, next) {
2125                 if (rt->hook == NULL || NG_HOOK_NOT_VALID(rt->hook))
2126                         continue;
2127
2128                 /* Match src and dst */
2129                 if (have_src) {
2130                         if (bcmp(&pcb->src, &rt->src, sizeof(rt->src)) == 0)
2131                                 break;
2132                 } else {
2133                         if (bcmp(&pcb->dst, &rt->src, sizeof(rt->src)) != 0)
2134                                 break;
2135                 }
2136         }
2137
2138         if (rt != NULL) {
2139                 pcb->rt = rt;
2140
2141                 if (!have_src)
2142                         bcopy(&rt->src, &pcb->src, sizeof(pcb->src));
2143         } else
2144                 error = EHOSTUNREACH;
2145
2146         /*
2147          * Send L2CA_Connect request
2148          */
2149
2150         if (error == 0) {
2151                 error = ng_btsocket_l2cap_send_l2ca_con_req(pcb);
2152                 if (error == 0) {
2153                         pcb->flags |= NG_BTSOCKET_L2CAP_CLIENT;
2154                         pcb->state = NG_BTSOCKET_L2CAP_CONNECTING;
2155                         soisconnecting(pcb->so);
2156
2157                         ng_btsocket_l2cap_timeout(pcb);
2158                 }
2159         }
2160
2161         mtx_unlock(&pcb->pcb_mtx);
2162         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
2163         mtx_unlock(&ng_btsocket_l2cap_rt_mtx);
2164
2165         return (error);
2166 } /* ng_btsocket_l2cap_connect */
2167
2168 /*
2169  * Process ioctl's calls on socket
2170  */
2171
2172 int
2173 ng_btsocket_l2cap_control(struct socket *so, u_long cmd, caddr_t data,
2174                 struct ifnet *ifp, struct thread *td)
2175 {
2176         return (EINVAL);
2177 } /* ng_btsocket_l2cap_control */
2178
2179 /*
2180  * Process getsockopt/setsockopt system calls
2181  */
2182
2183 int
2184 ng_btsocket_l2cap_ctloutput(struct socket *so, struct sockopt *sopt)
2185 {
2186         ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so);
2187         int                     error = 0;
2188         ng_l2cap_cfg_opt_val_t  v;
2189
2190         if (pcb == NULL)
2191                 return (EINVAL);
2192         if (ng_btsocket_l2cap_node == NULL)
2193                 return (EINVAL);
2194
2195         if (sopt->sopt_level != SOL_L2CAP)
2196                 return (0);
2197
2198         mtx_lock(&pcb->pcb_mtx);
2199
2200         switch (sopt->sopt_dir) {
2201         case SOPT_GET:
2202                 switch (sopt->sopt_name) {
2203                 case SO_L2CAP_IMTU: /* get incoming MTU */
2204                         error = sooptcopyout(sopt, &pcb->imtu,
2205                                                 sizeof(pcb->imtu));
2206                         break;
2207
2208                 case SO_L2CAP_OMTU: /* get outgoing (peer incoming) MTU */
2209                         error = sooptcopyout(sopt, &pcb->omtu,
2210                                                 sizeof(pcb->omtu));
2211                         break;
2212
2213                 case SO_L2CAP_IFLOW: /* get incoming flow spec. */
2214                         error = sooptcopyout(sopt, &pcb->iflow,
2215                                                 sizeof(pcb->iflow));
2216                         break;
2217
2218                 case SO_L2CAP_OFLOW: /* get outgoing flow spec. */
2219                         error = sooptcopyout(sopt, &pcb->oflow,
2220                                                 sizeof(pcb->oflow));
2221                         break;
2222
2223                 case SO_L2CAP_FLUSH: /* get flush timeout */
2224                         error = sooptcopyout(sopt, &pcb->flush_timo,
2225                                                 sizeof(pcb->flush_timo));
2226                         break;
2227
2228                 default:
2229                         error = ENOPROTOOPT;
2230                         break;
2231                 }
2232                 break;
2233
2234         case SOPT_SET:
2235                 /*
2236                  * XXX
2237                  * We do not allow to change these parameters while socket is
2238                  * connected or we are in the process of creating a connection.
2239                  * May be this should indicate re-configuration of the open
2240                  * channel?
2241                  */
2242
2243                 if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED) {
2244                         error = EACCES;
2245                         break;
2246                 }
2247
2248                 switch (sopt->sopt_name) {
2249                 case SO_L2CAP_IMTU: /* set incoming MTU */
2250                         error = sooptcopyin(sopt, &v, sizeof(v), sizeof(v.mtu));
2251                         if (error == 0)
2252                                 pcb->imtu = v.mtu;
2253                         break;
2254
2255                 case SO_L2CAP_OFLOW: /* set outgoing flow spec. */
2256                         error = sooptcopyin(sopt, &v, sizeof(v),sizeof(v.flow));
2257                         if (error == 0)
2258                                 bcopy(&v.flow, &pcb->oflow, sizeof(pcb->oflow));
2259                         break;
2260
2261                 case SO_L2CAP_FLUSH: /* set flush timeout */
2262                         error = sooptcopyin(sopt, &v, sizeof(v),
2263                                                 sizeof(v.flush_timo));
2264                         if (error == 0)
2265                                 pcb->flush_timo = v.flush_timo;
2266                         break;
2267
2268                 default:
2269                         error = ENOPROTOOPT;
2270                         break;
2271                 }
2272                 break;
2273
2274         default:
2275                 error = EINVAL;
2276                 break;
2277         }
2278
2279         mtx_unlock(&pcb->pcb_mtx);
2280
2281         return (error);
2282 } /* ng_btsocket_l2cap_ctloutput */
2283
2284 /*
2285  * Detach and destroy socket
2286  */
2287
2288 void
2289 ng_btsocket_l2cap_detach(struct socket *so)
2290 {
2291         ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so);
2292
2293         KASSERT(pcb != NULL, ("ng_btsocket_l2cap_detach: pcb == NULL"));
2294
2295         if (ng_btsocket_l2cap_node == NULL)
2296                 return;
2297
2298         mtx_lock(&ng_btsocket_l2cap_sockets_mtx);
2299         mtx_lock(&pcb->pcb_mtx);
2300
2301         /* XXX what to do with pending request? */
2302         if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO)
2303                 ng_btsocket_l2cap_untimeout(pcb);
2304
2305         if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED &&
2306             pcb->state != NG_BTSOCKET_L2CAP_DISCONNECTING)
2307                 /* Send disconnect request with "zero" token */
2308                 ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb);
2309
2310         pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
2311
2312         LIST_REMOVE(pcb, next);
2313
2314         mtx_unlock(&pcb->pcb_mtx);
2315         mtx_unlock(&ng_btsocket_l2cap_sockets_mtx);
2316
2317         mtx_destroy(&pcb->pcb_mtx);
2318         bzero(pcb, sizeof(*pcb));
2319         free(pcb, M_NETGRAPH_BTSOCKET_L2CAP);
2320
2321         soisdisconnected(so);
2322         so->so_pcb = NULL;
2323 } /* ng_btsocket_l2cap_detach */
2324
2325 /*
2326  * Disconnect socket
2327  */
2328
2329 int
2330 ng_btsocket_l2cap_disconnect(struct socket *so)
2331 {
2332         ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so);
2333         int                     error = 0;
2334
2335         if (pcb == NULL)
2336                 return (EINVAL);
2337         if (ng_btsocket_l2cap_node == NULL)
2338                 return (EINVAL);
2339
2340         mtx_lock(&pcb->pcb_mtx);
2341
2342         if (pcb->state == NG_BTSOCKET_L2CAP_DISCONNECTING) {
2343                 mtx_unlock(&pcb->pcb_mtx);
2344                 return (EINPROGRESS);
2345         }
2346
2347         if (pcb->state != NG_BTSOCKET_L2CAP_CLOSED) {
2348                 /* XXX FIXME what to do with pending request? */
2349                 if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO)
2350                         ng_btsocket_l2cap_untimeout(pcb);
2351
2352                 error = ng_btsocket_l2cap_send_l2ca_discon_req(pcb->token, pcb);
2353                 if (error == 0) {
2354                         pcb->state = NG_BTSOCKET_L2CAP_DISCONNECTING;
2355                         soisdisconnecting(so);
2356
2357                         ng_btsocket_l2cap_timeout(pcb);
2358                 }
2359
2360                 /* XXX FIXME what to do if error != 0 */
2361         }
2362
2363         mtx_unlock(&pcb->pcb_mtx);
2364
2365         return (error);
2366 } /* ng_btsocket_l2cap_disconnect */
2367
2368 /*
2369  * Listen on socket
2370  */
2371
2372 int
2373 ng_btsocket_l2cap_listen(struct socket *so, int backlog, struct thread *td)
2374 {
2375         ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so);
2376         int error;
2377
2378         SOCK_LOCK(so);
2379         error = solisten_proto_check(so);
2380         if (error != 0)
2381                 goto out;
2382         if (pcb == NULL) {
2383                 error = EINVAL;
2384                 goto out;
2385         }
2386         if (ng_btsocket_l2cap_node == NULL) {
2387                 error = EINVAL;
2388                 goto out;
2389         }
2390         if (pcb->psm == 0) {
2391                 error = EADDRNOTAVAIL;
2392                 goto out;
2393         }
2394         solisten_proto(so, backlog);
2395 out:
2396         SOCK_UNLOCK(so);
2397         return (error);
2398 } /* ng_btsocket_listen */
2399
2400 /*
2401  * Get peer address
2402  */
2403
2404 int
2405 ng_btsocket_l2cap_peeraddr(struct socket *so, struct sockaddr **nam)
2406 {
2407         ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so);
2408         struct sockaddr_l2cap   sa;
2409
2410         if (pcb == NULL)
2411                 return (EINVAL);
2412         if (ng_btsocket_l2cap_node == NULL)
2413                 return (EINVAL);
2414
2415         bcopy(&pcb->dst, &sa.l2cap_bdaddr, sizeof(sa.l2cap_bdaddr));
2416         sa.l2cap_psm = htole16(pcb->psm);
2417         sa.l2cap_len = sizeof(sa);
2418         sa.l2cap_family = AF_BLUETOOTH;
2419
2420         *nam = sodupsockaddr((struct sockaddr *) &sa, M_NOWAIT);
2421
2422         return ((*nam == NULL)? ENOMEM : 0);
2423 } /* ng_btsocket_l2cap_peeraddr */
2424
2425 /*
2426  * Send data to socket
2427  */
2428
2429 int
2430 ng_btsocket_l2cap_send(struct socket *so, int flags, struct mbuf *m,
2431                 struct sockaddr *nam, struct mbuf *control, struct thread *td)
2432 {
2433         ng_btsocket_l2cap_pcb_t *pcb = so2l2cap_pcb(so);
2434         int                      error = 0;
2435
2436         if (ng_btsocket_l2cap_node == NULL) {
2437                 error = ENETDOWN;
2438                 goto drop;
2439         }
2440
2441         /* Check socket and input */
2442         if (pcb == NULL || m == NULL || control != NULL) {
2443                 error = EINVAL;
2444                 goto drop;
2445         }
2446
2447         mtx_lock(&pcb->pcb_mtx);
2448
2449         /* Make sure socket is connected */
2450         if (pcb->state != NG_BTSOCKET_L2CAP_OPEN) {
2451                 mtx_unlock(&pcb->pcb_mtx);
2452                 error = ENOTCONN;
2453                 goto drop;
2454         }
2455
2456         /* Check route */
2457         if (pcb->rt == NULL ||
2458             pcb->rt->hook == NULL || NG_HOOK_NOT_VALID(pcb->rt->hook)) {
2459                 mtx_unlock(&pcb->pcb_mtx);
2460                 error = ENETDOWN;
2461                 goto drop;
2462         }
2463
2464         /* Check packet size agains outgoing (peer's incoming) MTU) */
2465         if (m->m_pkthdr.len > pcb->omtu) {
2466                 NG_BTSOCKET_L2CAP_ERR(
2467 "%s: Packet too big, len=%d, omtu=%d\n", __func__, m->m_pkthdr.len, pcb->omtu);
2468
2469                 mtx_unlock(&pcb->pcb_mtx);
2470                 error = EMSGSIZE;
2471                 goto drop;
2472         }
2473
2474         /*
2475          * First put packet on socket send queue. Then check if we have
2476          * pending timeout. If we do not have timeout then we must send
2477          * packet and schedule timeout. Otherwise do nothing and wait for
2478          * L2CA_WRITE_RSP.
2479          */
2480
2481         sbappendrecord(&pcb->so->so_snd, m);
2482         m = NULL;
2483
2484         if (!(pcb->flags & NG_BTSOCKET_L2CAP_TIMO)) {
2485                 error = ng_btsocket_l2cap_send2(pcb);
2486                 if (error == 0)
2487                         ng_btsocket_l2cap_timeout(pcb);
2488                 else
2489                         sbdroprecord(&pcb->so->so_snd); /* XXX */
2490         }
2491
2492         mtx_unlock(&pcb->pcb_mtx);
2493 drop:
2494         NG_FREE_M(m); /* checks for != NULL */
2495         NG_FREE_M(control);
2496
2497         return (error);
2498 } /* ng_btsocket_l2cap_send */
2499
2500 /*
2501  * Send first packet in the socket queue to the L2CAP layer
2502  */
2503
2504 static int
2505 ng_btsocket_l2cap_send2(ng_btsocket_l2cap_pcb_p pcb)
2506 {
2507         struct  mbuf            *m = NULL;
2508         ng_l2cap_l2ca_hdr_t     *hdr = NULL;
2509         int                      error = 0;
2510
2511         mtx_assert(&pcb->pcb_mtx, MA_OWNED);
2512
2513         if (pcb->so->so_snd.sb_cc == 0)
2514                 return (EINVAL); /* XXX */
2515
2516         m = m_dup(pcb->so->so_snd.sb_mb, M_NOWAIT);
2517         if (m == NULL)
2518                 return (ENOBUFS);
2519
2520         /* Create L2CA packet header */
2521         M_PREPEND(m, sizeof(*hdr), M_NOWAIT);
2522         if (m != NULL)
2523                 if (m->m_len < sizeof(*hdr))
2524                         m = m_pullup(m, sizeof(*hdr));
2525
2526         if (m == NULL) {
2527                 NG_BTSOCKET_L2CAP_ERR(
2528 "%s: Failed to create L2CA packet header\n", __func__);
2529
2530                 return (ENOBUFS);
2531         }
2532
2533         hdr = mtod(m, ng_l2cap_l2ca_hdr_t *);
2534         hdr->token = pcb->token;
2535         hdr->length = m->m_pkthdr.len - sizeof(*hdr);
2536         hdr->lcid = pcb->cid;
2537
2538         NG_BTSOCKET_L2CAP_INFO(
2539 "%s: Sending packet: len=%d, length=%d, lcid=%d, token=%d, state=%d\n",
2540                 __func__, m->m_pkthdr.len, hdr->length, hdr->lcid,
2541                 hdr->token, pcb->state);
2542
2543         /*
2544          * If we got here than we have successfuly creates new L2CAP
2545          * data packet and now we can send it to the L2CAP layer
2546          */
2547
2548         NG_SEND_DATA_ONLY(error, pcb->rt->hook, m);
2549
2550         return (error);
2551 } /* ng_btsocket_l2cap_send2 */
2552
2553 /*
2554  * Get socket address
2555  */
2556
2557 int
2558 ng_btsocket_l2cap_sockaddr(struct socket *so, struct sockaddr **nam)
2559 {
2560         ng_btsocket_l2cap_pcb_p pcb = so2l2cap_pcb(so);
2561         struct sockaddr_l2cap   sa;
2562
2563         if (pcb == NULL)
2564                 return (EINVAL);
2565         if (ng_btsocket_l2cap_node == NULL)
2566                 return (EINVAL);
2567
2568         bcopy(&pcb->src, &sa.l2cap_bdaddr, sizeof(sa.l2cap_bdaddr));
2569         sa.l2cap_psm = htole16(pcb->psm);
2570         sa.l2cap_len = sizeof(sa);
2571         sa.l2cap_family = AF_BLUETOOTH;
2572
2573         *nam = sodupsockaddr((struct sockaddr *) &sa, M_NOWAIT);
2574
2575         return ((*nam == NULL)? ENOMEM : 0);
2576 } /* ng_btsocket_l2cap_sockaddr */
2577
2578 /*****************************************************************************
2579  *****************************************************************************
2580  **                              Misc. functions
2581  *****************************************************************************
2582  *****************************************************************************/
2583
2584 /*
2585  * Look for the socket that listens on given PSM and bdaddr. Returns exact or
2586  * close match (if any). Caller must hold ng_btsocket_l2cap_sockets_mtx.
2587  */
2588
2589 static ng_btsocket_l2cap_pcb_p
2590 ng_btsocket_l2cap_pcb_by_addr(bdaddr_p bdaddr, int psm)
2591 {
2592         ng_btsocket_l2cap_pcb_p p = NULL, p1 = NULL;
2593
2594         mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED);
2595
2596         LIST_FOREACH(p, &ng_btsocket_l2cap_sockets, next) {
2597                 if (p->so == NULL || !(p->so->so_options & SO_ACCEPTCONN) ||
2598                     p->psm != psm)
2599                         continue;
2600
2601                 if (bcmp(&p->src, bdaddr, sizeof(p->src)) == 0)
2602                         break;
2603
2604                 if (bcmp(&p->src, NG_HCI_BDADDR_ANY, sizeof(p->src)) == 0)
2605                         p1 = p;
2606         }
2607
2608         return ((p != NULL)? p : p1);
2609 } /* ng_btsocket_l2cap_pcb_by_addr */
2610
2611 /*
2612  * Look for the socket that has given token.
2613  * Caller must hold ng_btsocket_l2cap_sockets_mtx.
2614  */
2615
2616 static ng_btsocket_l2cap_pcb_p
2617 ng_btsocket_l2cap_pcb_by_token(u_int32_t token)
2618 {
2619         ng_btsocket_l2cap_pcb_p p = NULL;
2620
2621         if (token == 0)
2622                 return (NULL);
2623
2624         mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED);
2625
2626         LIST_FOREACH(p, &ng_btsocket_l2cap_sockets, next)
2627                 if (p->token == token)
2628                         break;
2629
2630         return (p);
2631 } /* ng_btsocket_l2cap_pcb_by_token */
2632
2633 /*
2634  * Look for the socket that assigned to given source address and channel ID.
2635  * Caller must hold ng_btsocket_l2cap_sockets_mtx
2636  */
2637
2638 static ng_btsocket_l2cap_pcb_p
2639 ng_btsocket_l2cap_pcb_by_cid(bdaddr_p src, int cid)
2640 {
2641         ng_btsocket_l2cap_pcb_p p = NULL;
2642
2643         mtx_assert(&ng_btsocket_l2cap_sockets_mtx, MA_OWNED);
2644
2645         LIST_FOREACH(p, &ng_btsocket_l2cap_sockets, next)
2646                 if (p->cid == cid && bcmp(src, &p->src, sizeof(p->src)) == 0)
2647                         break;
2648
2649         return (p);
2650 } /* ng_btsocket_l2cap_pcb_by_cid */
2651
2652 /*
2653  * Set timeout on socket
2654  */
2655
2656 static void
2657 ng_btsocket_l2cap_timeout(ng_btsocket_l2cap_pcb_p pcb)
2658 {
2659         mtx_assert(&pcb->pcb_mtx, MA_OWNED);
2660
2661         if (!(pcb->flags & NG_BTSOCKET_L2CAP_TIMO)) {
2662                 pcb->flags |= NG_BTSOCKET_L2CAP_TIMO;
2663                 pcb->timo = timeout(ng_btsocket_l2cap_process_timeout, pcb,
2664                                         bluetooth_l2cap_ertx_timeout());
2665         } else
2666                 KASSERT(0,
2667 ("%s: Duplicated socket timeout?!\n", __func__));
2668 } /* ng_btsocket_l2cap_timeout */
2669
2670 /*
2671  * Unset timeout on socket
2672  */
2673
2674 static void
2675 ng_btsocket_l2cap_untimeout(ng_btsocket_l2cap_pcb_p pcb)
2676 {
2677         mtx_assert(&pcb->pcb_mtx, MA_OWNED);
2678
2679         if (pcb->flags & NG_BTSOCKET_L2CAP_TIMO) {
2680                 untimeout(ng_btsocket_l2cap_process_timeout, pcb, pcb->timo);
2681                 pcb->flags &= ~NG_BTSOCKET_L2CAP_TIMO;
2682         } else
2683                 KASSERT(0,
2684 ("%s: No socket timeout?!\n", __func__));
2685 } /* ng_btsocket_l2cap_untimeout */
2686
2687 /*
2688  * Process timeout on socket
2689  */
2690
2691 static void
2692 ng_btsocket_l2cap_process_timeout(void *xpcb)
2693 {
2694         ng_btsocket_l2cap_pcb_p pcb = (ng_btsocket_l2cap_pcb_p) xpcb;
2695
2696         mtx_lock(&pcb->pcb_mtx);
2697
2698         pcb->flags &= ~NG_BTSOCKET_L2CAP_TIMO;
2699         pcb->so->so_error = ETIMEDOUT;
2700
2701         switch (pcb->state) {
2702         case NG_BTSOCKET_L2CAP_CONNECTING:
2703         case NG_BTSOCKET_L2CAP_CONFIGURING:
2704                 /* Send disconnect request with "zero" token */
2705                 if (pcb->cid != 0)
2706                         ng_btsocket_l2cap_send_l2ca_discon_req(0, pcb);
2707
2708                 /* ... and close the socket */
2709                 pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
2710                 soisdisconnected(pcb->so);
2711                 break;
2712
2713         case NG_BTSOCKET_L2CAP_OPEN:
2714                 /* Send timeout - drop packet and wakeup sender */
2715                 sbdroprecord(&pcb->so->so_snd);
2716                 sowwakeup(pcb->so);
2717                 break;
2718
2719         case NG_BTSOCKET_L2CAP_DISCONNECTING:
2720                 /* Disconnect timeout - disconnect the socket anyway */
2721                 pcb->state = NG_BTSOCKET_L2CAP_CLOSED;
2722                 soisdisconnected(pcb->so);
2723                 break;
2724
2725         default:
2726                 NG_BTSOCKET_L2CAP_ERR(
2727 "%s: Invalid socket state=%d\n", __func__, pcb->state);
2728                 break;
2729         }
2730
2731         mtx_unlock(&pcb->pcb_mtx);
2732 } /* ng_btsocket_l2cap_process_timeout */
2733
2734 /*
2735  * Translate HCI/L2CAP error code into "errno" code
2736  * XXX Note: Some L2CAP and HCI error codes have the same value, but
2737  *     different meaning
2738  */
2739
2740 static int
2741 ng_btsocket_l2cap_result2errno(int result)
2742 {
2743         switch (result) {
2744         case 0x00: /* No error */
2745                 return (0);
2746
2747         case 0x01: /* Unknown HCI command */
2748                 return (ENODEV);
2749
2750         case 0x02: /* No connection */
2751                 return (ENOTCONN);
2752
2753         case 0x03: /* Hardware failure */
2754                 return (EIO);
2755
2756         case 0x04: /* Page timeout */
2757                 return (EHOSTDOWN);
2758
2759         case 0x05: /* Authentication failure */
2760         case 0x06: /* Key missing */
2761         case 0x18: /* Pairing not allowed */
2762         case 0x21: /* Role change not allowed */
2763         case 0x24: /* LMP PSU not allowed */
2764         case 0x25: /* Encryption mode not acceptable */
2765         case 0x26: /* Unit key used */
2766                 return (EACCES);
2767
2768         case 0x07: /* Memory full */
2769                 return (ENOMEM);
2770
2771         case 0x08:   /* Connection timeout */
2772         case 0x10:   /* Host timeout */
2773         case 0x22:   /* LMP response timeout */
2774         case 0xee:   /* HCI timeout */
2775         case 0xeeee: /* L2CAP timeout */
2776                 return (ETIMEDOUT);
2777
2778         case 0x09: /* Max number of connections */
2779         case 0x0a: /* Max number of SCO connections to a unit */
2780                 return (EMLINK);
2781
2782         case 0x0b: /* ACL connection already exists */
2783                 return (EEXIST);
2784
2785         case 0x0c: /* Command disallowed */
2786                 return (EBUSY);
2787
2788         case 0x0d: /* Host rejected due to limited resources */
2789         case 0x0e: /* Host rejected due to securiity reasons */
2790         case 0x0f: /* Host rejected due to remote unit is a personal unit */
2791         case 0x1b: /* SCO offset rejected */
2792         case 0x1c: /* SCO interval rejected */
2793         case 0x1d: /* SCO air mode rejected */
2794                 return (ECONNREFUSED);
2795
2796         case 0x11: /* Unsupported feature or parameter value */
2797         case 0x19: /* Unknown LMP PDU */
2798         case 0x1a: /* Unsupported remote feature */
2799         case 0x20: /* Unsupported LMP parameter value */
2800         case 0x27: /* QoS is not supported */
2801         case 0x29: /* Paring with unit key not supported */
2802                 return (EOPNOTSUPP);
2803
2804         case 0x12: /* Invalid HCI command parameter */
2805         case 0x1e: /* Invalid LMP parameters */
2806                 return (EINVAL);
2807
2808         case 0x13: /* Other end terminated connection: User ended connection */
2809         case 0x14: /* Other end terminated connection: Low resources */
2810         case 0x15: /* Other end terminated connection: About to power off */
2811                 return (ECONNRESET);
2812
2813         case 0x16: /* Connection terminated by local host */
2814                 return (ECONNABORTED);
2815
2816 #if 0 /* XXX not yet */
2817         case 0x17: /* Repeated attempts */
2818         case 0x1f: /* Unspecified error */
2819         case 0x23: /* LMP error transaction collision */
2820         case 0x28: /* Instant passed */
2821 #endif
2822         }
2823
2824         return (ENOSYS);
2825 } /* ng_btsocket_l2cap_result2errno */
2826