6 * Copyright (c) Maksim Yevmenkin <m_evmenkin@yahoo.com>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
30 * $Id: ng_l2cap_misc.c,v 1.5 2003/09/08 19:11:45 max Exp $
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
39 #include <sys/queue.h>
40 #include <netgraph/ng_message.h>
41 #include <netgraph/netgraph.h>
42 #include <netgraph/bluetooth/include/ng_bluetooth.h>
43 #include <netgraph/bluetooth/include/ng_hci.h>
44 #include <netgraph/bluetooth/include/ng_l2cap.h>
45 #include <netgraph/bluetooth/l2cap/ng_l2cap_var.h>
46 #include <netgraph/bluetooth/l2cap/ng_l2cap_cmds.h>
47 #include <netgraph/bluetooth/l2cap/ng_l2cap_evnt.h>
48 #include <netgraph/bluetooth/l2cap/ng_l2cap_llpi.h>
49 #include <netgraph/bluetooth/l2cap/ng_l2cap_ulpi.h>
50 #include <netgraph/bluetooth/l2cap/ng_l2cap_misc.h>
52 static u_int16_t ng_l2cap_get_cid (ng_l2cap_p, int);
54 /******************************************************************************
55 ******************************************************************************
57 ******************************************************************************
58 ******************************************************************************/
61 * Send hook information to the upper layer
65 ng_l2cap_send_hook_info(node_p node, hook_p hook, void *arg1, int arg2)
67 ng_l2cap_p l2cap = NULL;
68 struct ng_mesg *msg = NULL;
70 ng_l2cap_node_hook_info_ep *ep ;
72 if (node == NULL || NG_NODE_NOT_VALID(node) ||
73 hook == NULL || NG_HOOK_NOT_VALID(hook))
76 l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node);
77 if (l2cap->hci == NULL || NG_HOOK_NOT_VALID(l2cap->hci) ||
78 bcmp(&l2cap->bdaddr, NG_HCI_BDADDR_ANY, sizeof(l2cap->bdaddr)) == 0)
81 NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_NODE_HOOK_INFO,
82 sizeof(*ep), M_NOWAIT);
85 ep = (ng_l2cap_node_hook_info_ep *) &msg->data;
86 bcopy(&l2cap->bdaddr, &ep->addr, sizeof(bdaddr_t));
87 NG_SEND_MSG_HOOK(error, node, msg, hook, 0);
93 "%s: %s - failed to send HOOK_INFO message to hook \"%s\", error=%d\n",
94 __func__, NG_NODE_NAME(l2cap->node), NG_HOOK_NAME(hook),
96 } /* ng_l2cap_send_hook_info */
99 * Create new connection descriptor for the "remote" unit.
100 * Will link connection descriptor to the l2cap node.
104 ng_l2cap_new_con(ng_l2cap_p l2cap, bdaddr_p bdaddr, int type)
106 static int fake_con_handle = 0x0f00;
107 ng_l2cap_con_p con = NULL;
109 /* Create new connection descriptor */
110 con = malloc(sizeof(*con), M_NETGRAPH_L2CAP,
116 con->state = NG_L2CAP_CON_CLOSED;
121 * Assign fake connection handle to the connection descriptor.
122 * Bluetooth specification marks 0x0f00 - 0x0fff connection
123 * handles as reserved. We need this fake connection handles
124 * for timeouts. Connection handle will be passed as argument
125 * to timeout so when timeout happens we can find the right
126 * connection descriptor. We can not pass pointers, because
127 * timeouts are external (to Netgraph) events and there might
128 * be a race when node/hook goes down and timeout event already
129 * went into node's queue
132 con->con_handle = fake_con_handle ++;
133 if (fake_con_handle > 0x0fff)
134 fake_con_handle = 0x0f00;
136 bcopy(bdaddr, &con->remote, sizeof(con->remote));
137 con->linktype = type;
138 ng_callout_init(&con->con_timo);
140 con->ident = NG_L2CAP_FIRST_IDENT - 1;
141 TAILQ_INIT(&con->cmd_list);
143 /* Link connection */
144 LIST_INSERT_HEAD(&l2cap->con_list, con, next);
147 } /* ng_l2cap_new_con */
150 * Add reference to the connection descriptor
154 ng_l2cap_con_ref(ng_l2cap_con_p con)
158 if (con->flags & NG_L2CAP_CON_AUTO_DISCON_TIMO) {
159 if ((con->state != NG_L2CAP_CON_OPEN) ||
160 (con->flags & NG_L2CAP_CON_OUTGOING) == 0)
162 "%s: %s - bad auto disconnect timeout, state=%d, flags=%#x\n",
163 __func__, NG_NODE_NAME(con->l2cap->node),
164 con->state, con->flags);
166 ng_l2cap_discon_untimeout(con);
168 } /* ng_l2cap_con_ref */
171 * Remove reference from the connection descriptor
175 ng_l2cap_con_unref(ng_l2cap_con_p con)
181 "%s: %s - con->refcnt < 0\n", __func__, NG_NODE_NAME(con->l2cap->node));
184 * Set auto disconnect timer only if the following conditions are met:
185 * 1) we have no reference on the connection
186 * 2) connection is in OPEN state
187 * 3) it is an outgoing connection
188 * 4) disconnect timeout > 0
189 * 5) connection is not dying
192 if ((con->refcnt == 0) &&
193 (con->state == NG_L2CAP_CON_OPEN) &&
194 (con->flags & NG_L2CAP_CON_OUTGOING) &&
195 (con->l2cap->discon_timo > 0) &&
196 ((con->flags & NG_L2CAP_CON_DYING) == 0))
197 ng_l2cap_discon_timeout(con);
198 } /* ng_l2cap_con_unref */
201 * Set auto disconnect timeout
202 * XXX FIXME: check return code from ng_callout
206 ng_l2cap_discon_timeout(ng_l2cap_con_p con)
208 if (con->flags & (NG_L2CAP_CON_LP_TIMO|NG_L2CAP_CON_AUTO_DISCON_TIMO))
210 "%s: %s - invalid timeout, state=%d, flags=%#x\n",
211 __func__, NG_NODE_NAME(con->l2cap->node),
212 con->state, con->flags);
214 con->flags |= NG_L2CAP_CON_AUTO_DISCON_TIMO;
215 ng_callout(&con->con_timo, con->l2cap->node, NULL,
216 con->l2cap->discon_timo * hz,
217 ng_l2cap_process_discon_timeout, NULL,
221 } /* ng_l2cap_discon_timeout */
224 * Unset auto disconnect timeout
228 ng_l2cap_discon_untimeout(ng_l2cap_con_p con)
230 if (!(con->flags & NG_L2CAP_CON_AUTO_DISCON_TIMO))
232 "%s: %s - no disconnect timeout, state=%d, flags=%#x\n",
233 __func__, NG_NODE_NAME(con->l2cap->node),
234 con->state, con->flags);
236 if (ng_uncallout(&con->con_timo, con->l2cap->node) == 0)
239 con->flags &= ~NG_L2CAP_CON_AUTO_DISCON_TIMO;
242 } /* ng_l2cap_discon_untimeout */
245 * Free connection descriptor. Will unlink connection and free everything.
249 ng_l2cap_free_con(ng_l2cap_con_p con)
251 ng_l2cap_chan_p f = NULL, n = NULL;
253 con->state = NG_L2CAP_CON_CLOSED;
255 while (con->tx_pkt != NULL) {
256 struct mbuf *m = con->tx_pkt->m_nextpkt;
258 m_freem(con->tx_pkt);
262 NG_FREE_M(con->rx_pkt);
264 for (f = LIST_FIRST(&con->l2cap->chan_list); f != NULL; ) {
265 n = LIST_NEXT(f, next);
268 ng_l2cap_free_chan(f);
273 while (!TAILQ_EMPTY(&con->cmd_list)) {
274 ng_l2cap_cmd_p cmd = TAILQ_FIRST(&con->cmd_list);
276 ng_l2cap_unlink_cmd(cmd);
277 if (cmd->flags & NG_L2CAP_CMD_PENDING)
278 ng_l2cap_command_untimeout(cmd);
279 ng_l2cap_free_cmd(cmd);
282 if (con->flags & (NG_L2CAP_CON_AUTO_DISCON_TIMO|NG_L2CAP_CON_LP_TIMO))
284 "%s: %s - timeout pending! state=%d, flags=%#x\n",
285 __func__, NG_NODE_NAME(con->l2cap->node),
286 con->state, con->flags);
288 LIST_REMOVE(con, next);
290 bzero(con, sizeof(*con));
291 free(con, M_NETGRAPH_L2CAP);
292 } /* ng_l2cap_free_con */
295 * Get connection by "remote" address
299 ng_l2cap_con_by_addr(ng_l2cap_p l2cap, bdaddr_p bdaddr, unsigned int type)
301 ng_l2cap_con_p con = NULL;
303 LIST_FOREACH(con, &l2cap->con_list, next)
304 if ((bcmp(bdaddr, &con->remote, sizeof(con->remote)) == 0)&&
305 (con->linktype == type))
309 } /* ng_l2cap_con_by_addr */
312 * Get connection by "handle"
316 ng_l2cap_con_by_handle(ng_l2cap_p l2cap, u_int16_t con_handle)
318 ng_l2cap_con_p con = NULL;
320 LIST_FOREACH(con, &l2cap->con_list, next)
321 if (con->con_handle == con_handle)
325 } /* ng_l2cap_con_by_handle */
328 * Allocate new L2CAP channel descriptor on "con" conection with "psm".
329 * Will link the channel to the l2cap node
333 ng_l2cap_new_chan(ng_l2cap_p l2cap, ng_l2cap_con_p con, u_int16_t psm, int idtype)
335 ng_l2cap_chan_p ch = NULL;
337 ch = malloc(sizeof(*ch), M_NETGRAPH_L2CAP,
341 if(idtype == NG_L2CAP_L2CA_IDTYPE_ATT){
342 ch->scid = ch->dcid = NG_L2CAP_ATT_CID;
344 ch->scid = ng_l2cap_get_cid(l2cap,
345 (con->linktype!= NG_HCI_LINK_ACL));
348 if (ch->scid != NG_L2CAP_NULL_CID) {
349 /* Initialize channel */
352 ch->state = NG_L2CAP_CLOSED;
354 /* Set MTU and flow control settings to defaults */
355 ch->imtu = NG_L2CAP_MTU_DEFAULT;
356 bcopy(ng_l2cap_default_flow(), &ch->iflow, sizeof(ch->iflow));
358 ch->omtu = NG_L2CAP_MTU_DEFAULT;
359 bcopy(ng_l2cap_default_flow(), &ch->oflow, sizeof(ch->oflow));
361 ch->flush_timo = NG_L2CAP_FLUSH_TIMO_DEFAULT;
362 ch->link_timo = NG_L2CAP_LINK_TIMO_DEFAULT;
364 LIST_INSERT_HEAD(&l2cap->chan_list, ch, next);
366 ng_l2cap_con_ref(con);
368 bzero(ch, sizeof(*ch));
369 free(ch, M_NETGRAPH_L2CAP);
374 } /* ng_l2cap_new_chan */
378 ng_l2cap_chan_by_scid(ng_l2cap_p l2cap, u_int16_t scid, int idtype)
380 ng_l2cap_chan_p ch = NULL;
382 if(idtype == NG_L2CAP_L2CA_IDTYPE_ATT){
386 LIST_FOREACH(ch, &l2cap->chan_list, next){
387 if((idtype != NG_L2CAP_L2CA_IDTYPE_BREDR)&&
388 (ch->con->linktype == NG_HCI_LINK_ACL ))
390 if((idtype != NG_L2CAP_L2CA_IDTYPE_LE)&&
391 (ch->con->linktype != NG_HCI_LINK_ACL ))
394 if (ch->scid == scid)
398 } /* ng_l2cap_chan_by_scid */
401 ng_l2cap_chan_by_conhandle(ng_l2cap_p l2cap, uint16_t scid,
402 u_int16_t con_handle)
404 ng_l2cap_chan_p ch = NULL;
407 LIST_FOREACH(ch, &l2cap->chan_list, next){
408 if ((ch->scid == scid) &&
409 (ch->con->con_handle == con_handle))
413 } /* ng_l2cap_chan_by_scid */
416 * Free channel descriptor.
420 ng_l2cap_free_chan(ng_l2cap_chan_p ch)
422 ng_l2cap_cmd_p f = NULL, n = NULL;
424 f = TAILQ_FIRST(&ch->con->cmd_list);
427 n = TAILQ_NEXT(f, next);
430 ng_l2cap_unlink_cmd(f);
431 if (f->flags & NG_L2CAP_CMD_PENDING)
432 ng_l2cap_command_untimeout(f);
433 ng_l2cap_free_cmd(f);
439 LIST_REMOVE(ch, next);
441 ng_l2cap_con_unref(ch->con);
443 bzero(ch, sizeof(*ch));
444 free(ch, M_NETGRAPH_L2CAP);
445 } /* ng_l2cap_free_chan */
448 * Create new L2CAP command descriptor. WILL NOT add command to the queue.
452 ng_l2cap_new_cmd(ng_l2cap_con_p con, ng_l2cap_chan_p ch, u_int8_t ident,
453 u_int8_t code, u_int32_t token)
455 ng_l2cap_cmd_p cmd = NULL;
457 KASSERT((ch == NULL || ch->con == con),
458 ("%s: %s - invalid channel pointer!\n",
459 __func__, NG_NODE_NAME(con->l2cap->node)));
461 cmd = malloc(sizeof(*cmd), M_NETGRAPH_L2CAP,
471 ng_callout_init(&cmd->timo);
474 } /* ng_l2cap_new_cmd */
477 * Get pending (i.e. initiated by local side) L2CAP command descriptor by ident
481 ng_l2cap_cmd_by_ident(ng_l2cap_con_p con, u_int8_t ident)
483 ng_l2cap_cmd_p cmd = NULL;
485 TAILQ_FOREACH(cmd, &con->cmd_list, next) {
486 if ((cmd->flags & NG_L2CAP_CMD_PENDING) && cmd->ident == ident) {
487 KASSERT((cmd->con == con),
488 ("%s: %s - invalid connection pointer!\n",
489 __func__, NG_NODE_NAME(con->l2cap->node)));
496 } /* ng_l2cap_cmd_by_ident */
500 * XXX FIXME: check return code from ng_callout
504 ng_l2cap_lp_timeout(ng_l2cap_con_p con)
506 if (con->flags & (NG_L2CAP_CON_LP_TIMO|NG_L2CAP_CON_AUTO_DISCON_TIMO))
508 "%s: %s - invalid timeout, state=%d, flags=%#x\n",
509 __func__, NG_NODE_NAME(con->l2cap->node),
510 con->state, con->flags);
512 con->flags |= NG_L2CAP_CON_LP_TIMO;
513 ng_callout(&con->con_timo, con->l2cap->node, NULL,
514 bluetooth_hci_connect_timeout(),
515 ng_l2cap_process_lp_timeout, NULL,
519 } /* ng_l2cap_lp_timeout */
526 ng_l2cap_lp_untimeout(ng_l2cap_con_p con)
528 if (!(con->flags & NG_L2CAP_CON_LP_TIMO))
530 "%s: %s - no LP connection timeout, state=%d, flags=%#x\n",
531 __func__, NG_NODE_NAME(con->l2cap->node),
532 con->state, con->flags);
534 if (ng_uncallout(&con->con_timo, con->l2cap->node) == 0)
537 con->flags &= ~NG_L2CAP_CON_LP_TIMO;
540 } /* ng_l2cap_lp_untimeout */
543 * Set L2CAP command timeout
544 * XXX FIXME: check return code from ng_callout
548 ng_l2cap_command_timeout(ng_l2cap_cmd_p cmd, int timo)
552 if (cmd->flags & NG_L2CAP_CMD_PENDING)
554 "%s: %s - duplicated command timeout, code=%#x, flags=%#x\n",
555 __func__, NG_NODE_NAME(cmd->con->l2cap->node),
556 cmd->code, cmd->flags);
558 arg = ((cmd->ident << 16) | cmd->con->con_handle);
559 cmd->flags |= NG_L2CAP_CMD_PENDING;
560 ng_callout(&cmd->timo, cmd->con->l2cap->node, NULL, timo,
561 ng_l2cap_process_command_timeout, NULL, arg);
564 } /* ng_l2cap_command_timeout */
567 * Unset L2CAP command timeout
571 ng_l2cap_command_untimeout(ng_l2cap_cmd_p cmd)
573 if (!(cmd->flags & NG_L2CAP_CMD_PENDING))
575 "%s: %s - no command timeout, code=%#x, flags=%#x\n",
576 __func__, NG_NODE_NAME(cmd->con->l2cap->node),
577 cmd->code, cmd->flags);
579 if (ng_uncallout(&cmd->timo, cmd->con->l2cap->node) == 0)
582 cmd->flags &= ~NG_L2CAP_CMD_PENDING;
585 } /* ng_l2cap_command_untimeout */
588 * Prepend "m"buf with "size" bytes
592 ng_l2cap_prepend(struct mbuf *m, int size)
594 M_PREPEND(m, size, M_NOWAIT);
595 if (m == NULL || (m->m_len < size && (m = m_pullup(m, size)) == NULL))
599 } /* ng_l2cap_prepend */
602 * Default flow settings
606 ng_l2cap_default_flow(void)
608 static ng_l2cap_flow_t default_flow = {
610 /* service_type */ NG_HCI_SERVICE_TYPE_BEST_EFFORT,
611 /* token_rate */ 0xffffffff, /* maximum */
612 /* token_bucket_size */ 0xffffffff, /* maximum */
613 /* peak_bandwidth */ 0x00000000, /* maximum */
614 /* latency */ 0xffffffff, /* don't care */
615 /* delay_variation */ 0xffffffff /* don't care */
618 return (&default_flow);
619 } /* ng_l2cap_default_flow */
622 * Get next available channel ID
623 * XXX FIXME this is *UGLY* but will do for now
627 ng_l2cap_get_cid(ng_l2cap_p l2cap,int isle)
634 endcid = l2cap->lecid;
635 /*Assume Last CID is 2^n-1 */
636 mask = NG_L2CAP_LELAST_CID;
637 idtype = NG_L2CAP_L2CA_IDTYPE_LE;
640 /*Assume Last CID is 2^n-1 */
641 mask = NG_L2CAP_LAST_CID;
642 idtype = NG_L2CAP_L2CA_IDTYPE_BREDR;
644 cid = (endcid+1) & mask;
646 if (cid < NG_L2CAP_FIRST_CID)
647 cid = NG_L2CAP_FIRST_CID;
649 while (cid != endcid) {
650 if (ng_l2cap_chan_by_scid(l2cap, cid, idtype) == NULL) {
661 if (cid < NG_L2CAP_FIRST_CID)
662 cid = NG_L2CAP_FIRST_CID;
665 return (NG_L2CAP_NULL_CID);
666 } /* ng_l2cap_get_cid */
669 * Get next available command ident
670 * XXX FIXME this is *UGLY* but will do for now
674 ng_l2cap_get_ident(ng_l2cap_con_p con)
676 u_int8_t ident = con->ident + 1;
678 if (ident < NG_L2CAP_FIRST_IDENT)
679 ident = NG_L2CAP_FIRST_IDENT;
681 while (ident != con->ident) {
682 if (ng_l2cap_cmd_by_ident(con, ident) == NULL) {
689 if (ident < NG_L2CAP_FIRST_IDENT)
690 ident = NG_L2CAP_FIRST_IDENT;
693 return (NG_L2CAP_NULL_IDENT);
694 } /* ng_l2cap_get_ident */