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