![Gowtham Anandha Babu](/assets/img/avatar_default.png)
Variable 'controller' is assigned a value that is never used. Identified by cppcheck tool. Signed-off-by: Gowtham Anandha Babu <gowtham.ab@samsung.com> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
613 lines
15 KiB
C
613 lines
15 KiB
C
/*
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CMTP implementation for Linux Bluetooth stack (BlueZ).
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Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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#include <linux/export.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/poll.h>
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#include <linux/fcntl.h>
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#include <linux/skbuff.h>
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#include <linux/socket.h>
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#include <linux/ioctl.h>
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#include <linux/file.h>
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#include <linux/wait.h>
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#include <linux/kthread.h>
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#include <net/sock.h>
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#include <linux/isdn/capilli.h>
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#include <linux/isdn/capicmd.h>
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#include <linux/isdn/capiutil.h>
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#include "cmtp.h"
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#define CAPI_INTEROPERABILITY 0x20
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#define CAPI_INTEROPERABILITY_REQ CAPICMD(CAPI_INTEROPERABILITY, CAPI_REQ)
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#define CAPI_INTEROPERABILITY_CONF CAPICMD(CAPI_INTEROPERABILITY, CAPI_CONF)
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#define CAPI_INTEROPERABILITY_IND CAPICMD(CAPI_INTEROPERABILITY, CAPI_IND)
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#define CAPI_INTEROPERABILITY_RESP CAPICMD(CAPI_INTEROPERABILITY, CAPI_RESP)
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#define CAPI_INTEROPERABILITY_REQ_LEN (CAPI_MSG_BASELEN + 2)
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#define CAPI_INTEROPERABILITY_CONF_LEN (CAPI_MSG_BASELEN + 4)
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#define CAPI_INTEROPERABILITY_IND_LEN (CAPI_MSG_BASELEN + 2)
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#define CAPI_INTEROPERABILITY_RESP_LEN (CAPI_MSG_BASELEN + 2)
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#define CAPI_FUNCTION_REGISTER 0
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#define CAPI_FUNCTION_RELEASE 1
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#define CAPI_FUNCTION_GET_PROFILE 2
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#define CAPI_FUNCTION_GET_MANUFACTURER 3
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#define CAPI_FUNCTION_GET_VERSION 4
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#define CAPI_FUNCTION_GET_SERIAL_NUMBER 5
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#define CAPI_FUNCTION_MANUFACTURER 6
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#define CAPI_FUNCTION_LOOPBACK 7
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#define CMTP_MSGNUM 1
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#define CMTP_APPLID 2
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#define CMTP_MAPPING 3
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static struct cmtp_application *cmtp_application_add(struct cmtp_session *session, __u16 appl)
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{
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struct cmtp_application *app = kzalloc(sizeof(*app), GFP_KERNEL);
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BT_DBG("session %p application %p appl %d", session, app, appl);
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if (!app)
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return NULL;
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app->state = BT_OPEN;
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app->appl = appl;
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list_add_tail(&app->list, &session->applications);
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return app;
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}
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static void cmtp_application_del(struct cmtp_session *session, struct cmtp_application *app)
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{
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BT_DBG("session %p application %p", session, app);
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if (app) {
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list_del(&app->list);
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kfree(app);
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}
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}
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static struct cmtp_application *cmtp_application_get(struct cmtp_session *session, int pattern, __u16 value)
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{
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struct cmtp_application *app;
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struct list_head *p, *n;
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list_for_each_safe(p, n, &session->applications) {
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app = list_entry(p, struct cmtp_application, list);
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switch (pattern) {
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case CMTP_MSGNUM:
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if (app->msgnum == value)
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return app;
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break;
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case CMTP_APPLID:
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if (app->appl == value)
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return app;
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break;
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case CMTP_MAPPING:
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if (app->mapping == value)
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return app;
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break;
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}
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}
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return NULL;
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}
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static int cmtp_msgnum_get(struct cmtp_session *session)
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{
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session->msgnum++;
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if ((session->msgnum & 0xff) > 200)
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session->msgnum = CMTP_INITIAL_MSGNUM + 1;
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return session->msgnum;
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}
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static void cmtp_send_capimsg(struct cmtp_session *session, struct sk_buff *skb)
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{
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struct cmtp_scb *scb = (void *) skb->cb;
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BT_DBG("session %p skb %p len %d", session, skb, skb->len);
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scb->id = -1;
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scb->data = (CAPIMSG_COMMAND(skb->data) == CAPI_DATA_B3);
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skb_queue_tail(&session->transmit, skb);
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wake_up_interruptible(sk_sleep(session->sock->sk));
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}
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static void cmtp_send_interopmsg(struct cmtp_session *session,
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__u8 subcmd, __u16 appl, __u16 msgnum,
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__u16 function, unsigned char *buf, int len)
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{
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struct sk_buff *skb;
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unsigned char *s;
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BT_DBG("session %p subcmd 0x%02x appl %d msgnum %d", session, subcmd, appl, msgnum);
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skb = alloc_skb(CAPI_MSG_BASELEN + 6 + len, GFP_ATOMIC);
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if (!skb) {
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BT_ERR("Can't allocate memory for interoperability packet");
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return;
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}
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s = skb_put(skb, CAPI_MSG_BASELEN + 6 + len);
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capimsg_setu16(s, 0, CAPI_MSG_BASELEN + 6 + len);
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capimsg_setu16(s, 2, appl);
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capimsg_setu8 (s, 4, CAPI_INTEROPERABILITY);
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capimsg_setu8 (s, 5, subcmd);
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capimsg_setu16(s, 6, msgnum);
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/* Interoperability selector (Bluetooth Device Management) */
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capimsg_setu16(s, 8, 0x0001);
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capimsg_setu8 (s, 10, 3 + len);
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capimsg_setu16(s, 11, function);
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capimsg_setu8 (s, 13, len);
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if (len > 0)
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memcpy(s + 14, buf, len);
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cmtp_send_capimsg(session, skb);
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}
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static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *skb)
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{
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struct capi_ctr *ctrl = &session->ctrl;
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struct cmtp_application *application;
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__u16 appl, msgnum, func, info;
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__u32 controller;
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BT_DBG("session %p skb %p len %d", session, skb, skb->len);
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switch (CAPIMSG_SUBCOMMAND(skb->data)) {
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case CAPI_CONF:
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if (skb->len < CAPI_MSG_BASELEN + 10)
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break;
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func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 5);
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info = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 8);
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switch (func) {
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case CAPI_FUNCTION_REGISTER:
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msgnum = CAPIMSG_MSGID(skb->data);
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application = cmtp_application_get(session, CMTP_MSGNUM, msgnum);
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if (application) {
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application->state = BT_CONNECTED;
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application->msgnum = 0;
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application->mapping = CAPIMSG_APPID(skb->data);
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wake_up_interruptible(&session->wait);
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}
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break;
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case CAPI_FUNCTION_RELEASE:
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appl = CAPIMSG_APPID(skb->data);
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application = cmtp_application_get(session, CMTP_MAPPING, appl);
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if (application) {
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application->state = BT_CLOSED;
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application->msgnum = 0;
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wake_up_interruptible(&session->wait);
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}
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break;
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case CAPI_FUNCTION_GET_PROFILE:
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if (skb->len < CAPI_MSG_BASELEN + 11 + sizeof(capi_profile))
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break;
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controller = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 11);
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msgnum = CAPIMSG_MSGID(skb->data);
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if (!info && (msgnum == CMTP_INITIAL_MSGNUM)) {
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session->ncontroller = controller;
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wake_up_interruptible(&session->wait);
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break;
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}
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if (!info && ctrl) {
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memcpy(&ctrl->profile,
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skb->data + CAPI_MSG_BASELEN + 11,
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sizeof(capi_profile));
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session->state = BT_CONNECTED;
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capi_ctr_ready(ctrl);
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}
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break;
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case CAPI_FUNCTION_GET_MANUFACTURER:
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if (skb->len < CAPI_MSG_BASELEN + 15)
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break;
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if (!info && ctrl) {
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int len = min_t(uint, CAPI_MANUFACTURER_LEN,
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skb->data[CAPI_MSG_BASELEN + 14]);
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memset(ctrl->manu, 0, CAPI_MANUFACTURER_LEN);
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strncpy(ctrl->manu,
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skb->data + CAPI_MSG_BASELEN + 15, len);
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}
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break;
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case CAPI_FUNCTION_GET_VERSION:
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if (skb->len < CAPI_MSG_BASELEN + 32)
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break;
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if (!info && ctrl) {
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ctrl->version.majorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 16);
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ctrl->version.minorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 20);
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ctrl->version.majormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 24);
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ctrl->version.minormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 28);
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}
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break;
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case CAPI_FUNCTION_GET_SERIAL_NUMBER:
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if (skb->len < CAPI_MSG_BASELEN + 17)
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break;
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if (!info && ctrl) {
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int len = min_t(uint, CAPI_SERIAL_LEN,
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skb->data[CAPI_MSG_BASELEN + 16]);
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memset(ctrl->serial, 0, CAPI_SERIAL_LEN);
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strncpy(ctrl->serial,
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skb->data + CAPI_MSG_BASELEN + 17, len);
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}
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break;
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}
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break;
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case CAPI_IND:
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if (skb->len < CAPI_MSG_BASELEN + 6)
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break;
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func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 3);
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if (func == CAPI_FUNCTION_LOOPBACK) {
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int len = min_t(uint, skb->len - CAPI_MSG_BASELEN - 6,
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skb->data[CAPI_MSG_BASELEN + 5]);
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appl = CAPIMSG_APPID(skb->data);
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msgnum = CAPIMSG_MSGID(skb->data);
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cmtp_send_interopmsg(session, CAPI_RESP, appl, msgnum, func,
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skb->data + CAPI_MSG_BASELEN + 6, len);
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}
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break;
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}
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kfree_skb(skb);
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}
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void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb)
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{
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struct capi_ctr *ctrl = &session->ctrl;
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struct cmtp_application *application;
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__u16 appl;
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__u32 contr;
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BT_DBG("session %p skb %p len %d", session, skb, skb->len);
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if (skb->len < CAPI_MSG_BASELEN)
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return;
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if (CAPIMSG_COMMAND(skb->data) == CAPI_INTEROPERABILITY) {
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cmtp_recv_interopmsg(session, skb);
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return;
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}
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if (session->flags & (1 << CMTP_LOOPBACK)) {
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kfree_skb(skb);
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return;
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}
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appl = CAPIMSG_APPID(skb->data);
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contr = CAPIMSG_CONTROL(skb->data);
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application = cmtp_application_get(session, CMTP_MAPPING, appl);
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if (application) {
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appl = application->appl;
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CAPIMSG_SETAPPID(skb->data, appl);
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} else {
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BT_ERR("Can't find application with id %d", appl);
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kfree_skb(skb);
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return;
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}
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if ((contr & 0x7f) == 0x01) {
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contr = (contr & 0xffffff80) | session->num;
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CAPIMSG_SETCONTROL(skb->data, contr);
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}
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capi_ctr_handle_message(ctrl, appl, skb);
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}
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static int cmtp_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
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{
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BT_DBG("ctrl %p data %p", ctrl, data);
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return 0;
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}
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static void cmtp_reset_ctr(struct capi_ctr *ctrl)
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{
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struct cmtp_session *session = ctrl->driverdata;
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BT_DBG("ctrl %p", ctrl);
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capi_ctr_down(ctrl);
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atomic_inc(&session->terminate);
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wake_up_process(session->task);
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}
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static void cmtp_register_appl(struct capi_ctr *ctrl, __u16 appl, capi_register_params *rp)
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{
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DECLARE_WAITQUEUE(wait, current);
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struct cmtp_session *session = ctrl->driverdata;
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struct cmtp_application *application;
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unsigned long timeo = CMTP_INTEROP_TIMEOUT;
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unsigned char buf[8];
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int err = 0, nconn, want = rp->level3cnt;
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BT_DBG("ctrl %p appl %d level3cnt %d datablkcnt %d datablklen %d",
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ctrl, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
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application = cmtp_application_add(session, appl);
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if (!application) {
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BT_ERR("Can't allocate memory for new application");
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return;
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}
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if (want < 0)
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nconn = ctrl->profile.nbchannel * -want;
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else
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nconn = want;
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if (nconn == 0)
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nconn = ctrl->profile.nbchannel;
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capimsg_setu16(buf, 0, nconn);
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capimsg_setu16(buf, 2, rp->datablkcnt);
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capimsg_setu16(buf, 4, rp->datablklen);
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application->state = BT_CONFIG;
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application->msgnum = cmtp_msgnum_get(session);
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cmtp_send_interopmsg(session, CAPI_REQ, 0x0000, application->msgnum,
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CAPI_FUNCTION_REGISTER, buf, 6);
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add_wait_queue(&session->wait, &wait);
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while (1) {
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set_current_state(TASK_INTERRUPTIBLE);
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if (!timeo) {
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err = -EAGAIN;
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break;
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}
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if (application->state == BT_CLOSED) {
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err = -application->err;
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break;
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}
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if (application->state == BT_CONNECTED)
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break;
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if (signal_pending(current)) {
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err = -EINTR;
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break;
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}
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timeo = schedule_timeout(timeo);
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}
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&session->wait, &wait);
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if (err) {
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cmtp_application_del(session, application);
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return;
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}
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}
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static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl)
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{
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struct cmtp_session *session = ctrl->driverdata;
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struct cmtp_application *application;
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BT_DBG("ctrl %p appl %d", ctrl, appl);
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application = cmtp_application_get(session, CMTP_APPLID, appl);
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if (!application) {
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BT_ERR("Can't find application");
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return;
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}
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application->msgnum = cmtp_msgnum_get(session);
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cmtp_send_interopmsg(session, CAPI_REQ, application->mapping, application->msgnum,
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CAPI_FUNCTION_RELEASE, NULL, 0);
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wait_event_interruptible_timeout(session->wait,
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(application->state == BT_CLOSED), CMTP_INTEROP_TIMEOUT);
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cmtp_application_del(session, application);
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}
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static u16 cmtp_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
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{
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struct cmtp_session *session = ctrl->driverdata;
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struct cmtp_application *application;
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__u16 appl;
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__u32 contr;
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BT_DBG("ctrl %p skb %p", ctrl, skb);
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appl = CAPIMSG_APPID(skb->data);
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contr = CAPIMSG_CONTROL(skb->data);
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application = cmtp_application_get(session, CMTP_APPLID, appl);
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if ((!application) || (application->state != BT_CONNECTED)) {
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BT_ERR("Can't find application with id %d", appl);
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return CAPI_ILLAPPNR;
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}
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CAPIMSG_SETAPPID(skb->data, application->mapping);
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if ((contr & 0x7f) == session->num) {
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contr = (contr & 0xffffff80) | 0x01;
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CAPIMSG_SETCONTROL(skb->data, contr);
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}
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cmtp_send_capimsg(session, skb);
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return CAPI_NOERROR;
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}
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static char *cmtp_procinfo(struct capi_ctr *ctrl)
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{
|
|
return "CAPI Message Transport Protocol";
|
|
}
|
|
|
|
static int cmtp_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct capi_ctr *ctrl = m->private;
|
|
struct cmtp_session *session = ctrl->driverdata;
|
|
struct cmtp_application *app;
|
|
struct list_head *p, *n;
|
|
|
|
seq_printf(m, "%s\n\n", cmtp_procinfo(ctrl));
|
|
seq_printf(m, "addr %s\n", session->name);
|
|
seq_printf(m, "ctrl %d\n", session->num);
|
|
|
|
list_for_each_safe(p, n, &session->applications) {
|
|
app = list_entry(p, struct cmtp_application, list);
|
|
seq_printf(m, "appl %d -> %d\n", app->appl, app->mapping);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cmtp_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, cmtp_proc_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations cmtp_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cmtp_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
int cmtp_attach_device(struct cmtp_session *session)
|
|
{
|
|
unsigned char buf[4];
|
|
long ret;
|
|
|
|
BT_DBG("session %p", session);
|
|
|
|
capimsg_setu32(buf, 0, 0);
|
|
|
|
cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, CMTP_INITIAL_MSGNUM,
|
|
CAPI_FUNCTION_GET_PROFILE, buf, 4);
|
|
|
|
ret = wait_event_interruptible_timeout(session->wait,
|
|
session->ncontroller, CMTP_INTEROP_TIMEOUT);
|
|
|
|
BT_INFO("Found %d CAPI controller(s) on device %s", session->ncontroller, session->name);
|
|
|
|
if (!ret)
|
|
return -ETIMEDOUT;
|
|
|
|
if (!session->ncontroller)
|
|
return -ENODEV;
|
|
|
|
if (session->ncontroller > 1)
|
|
BT_INFO("Setting up only CAPI controller 1");
|
|
|
|
session->ctrl.owner = THIS_MODULE;
|
|
session->ctrl.driverdata = session;
|
|
strcpy(session->ctrl.name, session->name);
|
|
|
|
session->ctrl.driver_name = "cmtp";
|
|
session->ctrl.load_firmware = cmtp_load_firmware;
|
|
session->ctrl.reset_ctr = cmtp_reset_ctr;
|
|
session->ctrl.register_appl = cmtp_register_appl;
|
|
session->ctrl.release_appl = cmtp_release_appl;
|
|
session->ctrl.send_message = cmtp_send_message;
|
|
|
|
session->ctrl.procinfo = cmtp_procinfo;
|
|
session->ctrl.proc_fops = &cmtp_proc_fops;
|
|
|
|
if (attach_capi_ctr(&session->ctrl) < 0) {
|
|
BT_ERR("Can't attach new controller");
|
|
return -EBUSY;
|
|
}
|
|
|
|
session->num = session->ctrl.cnr;
|
|
|
|
BT_DBG("session %p num %d", session, session->num);
|
|
|
|
capimsg_setu32(buf, 0, 1);
|
|
|
|
cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
|
|
CAPI_FUNCTION_GET_MANUFACTURER, buf, 4);
|
|
|
|
cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
|
|
CAPI_FUNCTION_GET_VERSION, buf, 4);
|
|
|
|
cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
|
|
CAPI_FUNCTION_GET_SERIAL_NUMBER, buf, 4);
|
|
|
|
cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
|
|
CAPI_FUNCTION_GET_PROFILE, buf, 4);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void cmtp_detach_device(struct cmtp_session *session)
|
|
{
|
|
BT_DBG("session %p", session);
|
|
|
|
detach_capi_ctr(&session->ctrl);
|
|
}
|