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| Current File : //sys/netgraph/bluetooth/l2cap/ng_l2cap_cmds.c |
/*
* ng_l2cap_cmds.c
*/
/*-
* Copyright (c) Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: ng_l2cap_cmds.c,v 1.2 2003/09/08 19:11:45 max Exp $
* $FreeBSD: release/9.1.0/sys/netgraph/bluetooth/l2cap/ng_l2cap_cmds.c 168009 2007-03-28 21:25:56Z emax $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/bluetooth/include/ng_bluetooth.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <netgraph/bluetooth/include/ng_l2cap.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_var.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_cmds.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_evnt.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_llpi.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_ulpi.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_misc.h>
/******************************************************************************
******************************************************************************
** L2CAP commands processing module
******************************************************************************
******************************************************************************/
/*
* Process L2CAP command queue on connection
*/
void
ng_l2cap_con_wakeup(ng_l2cap_con_p con)
{
ng_l2cap_cmd_p cmd = NULL;
struct mbuf *m = NULL;
int error = 0;
/* Find first non-pending command in the queue */
TAILQ_FOREACH(cmd, &con->cmd_list, next) {
KASSERT((cmd->con == con),
("%s: %s - invalid connection pointer!\n",
__func__, NG_NODE_NAME(con->l2cap->node)));
if (!(cmd->flags & NG_L2CAP_CMD_PENDING))
break;
}
if (cmd == NULL)
return;
/* Detach command packet */
m = cmd->aux;
cmd->aux = NULL;
/* Process command */
switch (cmd->code) {
case NG_L2CAP_CMD_REJ:
case NG_L2CAP_DISCON_RSP:
case NG_L2CAP_ECHO_RSP:
case NG_L2CAP_INFO_RSP:
/*
* Do not check return ng_l2cap_lp_send() value, because
* in these cases we do not really have a graceful way out.
* ECHO and INFO responses are internal to the stack and not
* visible to user. REJect is just being nice to remote end
* (otherwise remote end will timeout anyway). DISCON is
* probably most interesting here, however, if it fails
* there is nothing we can do anyway.
*/
(void) ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
ng_l2cap_unlink_cmd(cmd);
ng_l2cap_free_cmd(cmd);
break;
case NG_L2CAP_CON_REQ:
error = ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
if (error != 0) {
ng_l2cap_l2ca_con_rsp(cmd->ch, cmd->token,
NG_L2CAP_NO_RESOURCES, 0);
ng_l2cap_free_chan(cmd->ch); /* will free commands */
} else
ng_l2cap_command_timeout(cmd,
bluetooth_l2cap_rtx_timeout());
break;
case NG_L2CAP_CON_RSP:
error = ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
ng_l2cap_unlink_cmd(cmd);
if (cmd->ch != NULL) {
ng_l2cap_l2ca_con_rsp_rsp(cmd->ch, cmd->token,
(error == 0)? NG_L2CAP_SUCCESS :
NG_L2CAP_NO_RESOURCES);
if (error != 0)
ng_l2cap_free_chan(cmd->ch);
}
ng_l2cap_free_cmd(cmd);
break;
case NG_L2CAP_CFG_REQ:
error = ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
if (error != 0) {
ng_l2cap_l2ca_cfg_rsp(cmd->ch, cmd->token,
NG_L2CAP_NO_RESOURCES);
ng_l2cap_unlink_cmd(cmd);
ng_l2cap_free_cmd(cmd);
} else
ng_l2cap_command_timeout(cmd,
bluetooth_l2cap_rtx_timeout());
break;
case NG_L2CAP_CFG_RSP:
error = ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
ng_l2cap_unlink_cmd(cmd);
if (cmd->ch != NULL)
ng_l2cap_l2ca_cfg_rsp_rsp(cmd->ch, cmd->token,
(error == 0)? NG_L2CAP_SUCCESS :
NG_L2CAP_NO_RESOURCES);
ng_l2cap_free_cmd(cmd);
break;
case NG_L2CAP_DISCON_REQ:
error = ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
ng_l2cap_l2ca_discon_rsp(cmd->ch, cmd->token,
(error == 0)? NG_L2CAP_SUCCESS : NG_L2CAP_NO_RESOURCES);
if (error != 0)
ng_l2cap_free_chan(cmd->ch); /* XXX free channel */
else
ng_l2cap_command_timeout(cmd,
bluetooth_l2cap_rtx_timeout());
break;
case NG_L2CAP_ECHO_REQ:
error = ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
if (error != 0) {
ng_l2cap_l2ca_ping_rsp(con, cmd->token,
NG_L2CAP_NO_RESOURCES, NULL);
ng_l2cap_unlink_cmd(cmd);
ng_l2cap_free_cmd(cmd);
} else
ng_l2cap_command_timeout(cmd,
bluetooth_l2cap_rtx_timeout());
break;
case NG_L2CAP_INFO_REQ:
error = ng_l2cap_lp_send(con, NG_L2CAP_SIGNAL_CID, m);
if (error != 0) {
ng_l2cap_l2ca_get_info_rsp(con, cmd->token,
NG_L2CAP_NO_RESOURCES, NULL);
ng_l2cap_unlink_cmd(cmd);
ng_l2cap_free_cmd(cmd);
} else
ng_l2cap_command_timeout(cmd,
bluetooth_l2cap_rtx_timeout());
break;
case NGM_L2CAP_L2CA_WRITE: {
int length = m->m_pkthdr.len;
if (cmd->ch->dcid == NG_L2CAP_CLT_CID) {
m = ng_l2cap_prepend(m, sizeof(ng_l2cap_clt_hdr_t));
if (m == NULL)
error = ENOBUFS;
else
mtod(m, ng_l2cap_clt_hdr_t *)->psm =
htole16(cmd->ch->psm);
}
if (error == 0)
error = ng_l2cap_lp_send(con, cmd->ch->dcid, m);
ng_l2cap_l2ca_write_rsp(cmd->ch, cmd->token,
(error == 0)? NG_L2CAP_SUCCESS : NG_L2CAP_NO_RESOURCES,
length);
ng_l2cap_unlink_cmd(cmd);
ng_l2cap_free_cmd(cmd);
} break;
/* XXX FIXME add other commands */
default:
panic(
"%s: %s - unknown command code=%d\n",
__func__, NG_NODE_NAME(con->l2cap->node), cmd->code);
break;
}
} /* ng_l2cap_con_wakeup */
/*
* We have failed to open ACL connection to the remote unit. Could be negative
* confirmation or timeout. So fail any "delayed" commands, notify upper layer,
* remove all channels and remove connection descriptor.
*/
void
ng_l2cap_con_fail(ng_l2cap_con_p con, u_int16_t result)
{
ng_l2cap_p l2cap = con->l2cap;
ng_l2cap_cmd_p cmd = NULL;
ng_l2cap_chan_p ch = NULL;
NG_L2CAP_INFO(
"%s: %s - ACL connection failed, result=%d\n",
__func__, NG_NODE_NAME(l2cap->node), result);
/* Connection is dying */
con->flags |= NG_L2CAP_CON_DYING;
/* Clean command queue */
while (!TAILQ_EMPTY(&con->cmd_list)) {
cmd = TAILQ_FIRST(&con->cmd_list);
ng_l2cap_unlink_cmd(cmd);
if(cmd->flags & NG_L2CAP_CMD_PENDING)
ng_l2cap_command_untimeout(cmd);
KASSERT((cmd->con == con),
("%s: %s - invalid connection pointer!\n",
__func__, NG_NODE_NAME(l2cap->node)));
switch (cmd->code) {
case NG_L2CAP_CMD_REJ:
case NG_L2CAP_DISCON_RSP:
case NG_L2CAP_ECHO_RSP:
case NG_L2CAP_INFO_RSP:
break;
case NG_L2CAP_CON_REQ:
ng_l2cap_l2ca_con_rsp(cmd->ch, cmd->token, result, 0);
break;
case NG_L2CAP_CON_RSP:
if (cmd->ch != NULL)
ng_l2cap_l2ca_con_rsp_rsp(cmd->ch, cmd->token,
result);
break;
case NG_L2CAP_CFG_REQ:
case NG_L2CAP_CFG_RSP:
case NGM_L2CAP_L2CA_WRITE:
ng_l2cap_l2ca_discon_ind(cmd->ch);
break;
case NG_L2CAP_DISCON_REQ:
ng_l2cap_l2ca_discon_rsp(cmd->ch, cmd->token,
NG_L2CAP_SUCCESS);
break;
case NG_L2CAP_ECHO_REQ:
ng_l2cap_l2ca_ping_rsp(cmd->con, cmd->token,
result, NULL);
break;
case NG_L2CAP_INFO_REQ:
ng_l2cap_l2ca_get_info_rsp(cmd->con, cmd->token,
result, NULL);
break;
/* XXX FIXME add other commands */
default:
panic(
"%s: %s - unexpected command code=%d\n",
__func__, NG_NODE_NAME(l2cap->node), cmd->code);
break;
}
if (cmd->ch != NULL)
ng_l2cap_free_chan(cmd->ch);
ng_l2cap_free_cmd(cmd);
}
/*
* There still might be channels (in OPEN state?) that
* did not submit any commands, so diconnect them
*/
LIST_FOREACH(ch, &l2cap->chan_list, next)
if (ch->con == con)
ng_l2cap_l2ca_discon_ind(ch);
/* Free connection descriptor */
ng_l2cap_free_con(con);
} /* ng_l2cap_con_fail */
/*
* Process L2CAP command timeout. In general - notify upper layer and destroy
* channel. Do not pay much attension to return code, just do our best.
*/
void
ng_l2cap_process_command_timeout(node_p node, hook_p hook, void *arg1, int arg2)
{
ng_l2cap_p l2cap = NULL;
ng_l2cap_con_p con = NULL;
ng_l2cap_cmd_p cmd = NULL;
u_int16_t con_handle = (arg2 & 0x0ffff);
u_int8_t ident = ((arg2 >> 16) & 0xff);
if (NG_NODE_NOT_VALID(node)) {
printf("%s: Netgraph node is not valid\n", __func__);
return;
}
l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node);
con = ng_l2cap_con_by_handle(l2cap, con_handle);
if (con == NULL) {
NG_L2CAP_ALERT(
"%s: %s - could not find connection, con_handle=%d\n",
__func__, NG_NODE_NAME(node), con_handle);
return;
}
cmd = ng_l2cap_cmd_by_ident(con, ident);
if (cmd == NULL) {
NG_L2CAP_ALERT(
"%s: %s - could not find command, con_handle=%d, ident=%d\n",
__func__, NG_NODE_NAME(node), con_handle, ident);
return;
}
cmd->flags &= ~NG_L2CAP_CMD_PENDING;
ng_l2cap_unlink_cmd(cmd);
switch (cmd->code) {
case NG_L2CAP_CON_REQ:
ng_l2cap_l2ca_con_rsp(cmd->ch, cmd->token, NG_L2CAP_TIMEOUT, 0);
ng_l2cap_free_chan(cmd->ch);
break;
case NG_L2CAP_CFG_REQ:
ng_l2cap_l2ca_cfg_rsp(cmd->ch, cmd->token, NG_L2CAP_TIMEOUT);
break;
case NG_L2CAP_DISCON_REQ:
ng_l2cap_l2ca_discon_rsp(cmd->ch, cmd->token, NG_L2CAP_TIMEOUT);
ng_l2cap_free_chan(cmd->ch); /* XXX free channel */
break;
case NG_L2CAP_ECHO_REQ:
/* Echo request timed out. Let the upper layer know */
ng_l2cap_l2ca_ping_rsp(cmd->con, cmd->token,
NG_L2CAP_TIMEOUT, NULL);
break;
case NG_L2CAP_INFO_REQ:
/* Info request timed out. Let the upper layer know */
ng_l2cap_l2ca_get_info_rsp(cmd->con, cmd->token,
NG_L2CAP_TIMEOUT, NULL);
break;
/* XXX FIXME add other commands */
default:
panic(
"%s: %s - unexpected command code=%d\n",
__func__, NG_NODE_NAME(l2cap->node), cmd->code);
break;
}
ng_l2cap_free_cmd(cmd);
} /* ng_l2cap_process_command_timeout */