cregit-Linux how code gets into the kernel

Release 4.11 net/bluetooth/cmtp/capi.c

/*
   CMTP implementation for Linux Bluetooth stack (BlueZ).
   Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

#include <linux/export.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched/signal.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/fcntl.h>
#include <linux/skbuff.h>
#include <linux/socket.h>
#include <linux/ioctl.h>
#include <linux/file.h>
#include <linux/wait.h>
#include <linux/kthread.h>
#include <net/sock.h>

#include <linux/isdn/capilli.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>

#include "cmtp.h"


#define CAPI_INTEROPERABILITY		0x20


#define CAPI_INTEROPERABILITY_REQ	CAPICMD(CAPI_INTEROPERABILITY, CAPI_REQ)

#define CAPI_INTEROPERABILITY_CONF	CAPICMD(CAPI_INTEROPERABILITY, CAPI_CONF)

#define CAPI_INTEROPERABILITY_IND	CAPICMD(CAPI_INTEROPERABILITY, CAPI_IND)

#define CAPI_INTEROPERABILITY_RESP	CAPICMD(CAPI_INTEROPERABILITY, CAPI_RESP)


#define CAPI_INTEROPERABILITY_REQ_LEN	(CAPI_MSG_BASELEN + 2)

#define CAPI_INTEROPERABILITY_CONF_LEN	(CAPI_MSG_BASELEN + 4)

#define CAPI_INTEROPERABILITY_IND_LEN	(CAPI_MSG_BASELEN + 2)

#define CAPI_INTEROPERABILITY_RESP_LEN	(CAPI_MSG_BASELEN + 2)


#define CAPI_FUNCTION_REGISTER		0

#define CAPI_FUNCTION_RELEASE		1

#define CAPI_FUNCTION_GET_PROFILE	2

#define CAPI_FUNCTION_GET_MANUFACTURER	3

#define CAPI_FUNCTION_GET_VERSION	4

#define CAPI_FUNCTION_GET_SERIAL_NUMBER	5

#define CAPI_FUNCTION_MANUFACTURER	6

#define CAPI_FUNCTION_LOOPBACK		7



#define CMTP_MSGNUM	1

#define CMTP_APPLID	2

#define CMTP_MAPPING	3


static struct cmtp_application *cmtp_application_add(struct cmtp_session *session, __u16 appl) { struct cmtp_application *app = kzalloc(sizeof(*app), GFP_KERNEL); BT_DBG("session %p application %p appl %d", session, app, appl); if (!app) return NULL; app->state = BT_OPEN; app->appl = appl; list_add_tail(&app->list, &session->applications); return app; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann79100.00%2100.00%
Total79100.00%2100.00%


static void cmtp_application_del(struct cmtp_session *session, struct cmtp_application *app) { BT_DBG("session %p application %p", session, app); if (app) { list_del(&app->list); kfree(app); } }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann44100.00%1100.00%
Total44100.00%1100.00%


static struct cmtp_application *cmtp_application_get(struct cmtp_session *session, int pattern, __u16 value) { struct cmtp_application *app; list_for_each_entry(app, &session->applications, list) { switch (pattern) { case CMTP_MSGNUM: if (app->msgnum == value) return app; break; case CMTP_APPLID: if (app->appl == value) return app; break; case CMTP_MAPPING: if (app->mapping == value) return app; break; } } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann8495.45%150.00%
Geliang Tang44.55%150.00%
Total88100.00%2100.00%


static int cmtp_msgnum_get(struct cmtp_session *session) { session->msgnum++; if ((session->msgnum & 0xff) > 200) session->msgnum = CMTP_INITIAL_MSGNUM + 1; return session->msgnum; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann41100.00%1100.00%
Total41100.00%1100.00%


static void cmtp_send_capimsg(struct cmtp_session *session, struct sk_buff *skb) { struct cmtp_scb *scb = (void *) skb->cb; BT_DBG("session %p skb %p len %d", session, skb, skb->len); scb->id = -1; scb->data = (CAPIMSG_COMMAND(skb->data) == CAPI_DATA_B3); skb_queue_tail(&session->transmit, skb); wake_up_interruptible(sk_sleep(session->sock->sk)); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann7890.70%150.00%
Szymon Janc89.30%150.00%
Total86100.00%2100.00%


static void cmtp_send_interopmsg(struct cmtp_session *session, __u8 subcmd, __u16 appl, __u16 msgnum, __u16 function, unsigned char *buf, int len) { struct sk_buff *skb; unsigned char *s; BT_DBG("session %p subcmd 0x%02x appl %d msgnum %d", session, subcmd, appl, msgnum); skb = alloc_skb(CAPI_MSG_BASELEN + 6 + len, GFP_ATOMIC); if (!skb) { BT_ERR("Can't allocate memory for interoperability packet"); return; } s = skb_put(skb, CAPI_MSG_BASELEN + 6 + len); capimsg_setu16(s, 0, CAPI_MSG_BASELEN + 6 + len); capimsg_setu16(s, 2, appl); capimsg_setu8 (s, 4, CAPI_INTEROPERABILITY); capimsg_setu8 (s, 5, subcmd); capimsg_setu16(s, 6, msgnum); /* Interoperability selector (Bluetooth Device Management) */ capimsg_setu16(s, 8, 0x0001); capimsg_setu8 (s, 10, 3 + len); capimsg_setu16(s, 11, function); capimsg_setu8 (s, 13, len); if (len > 0) memcpy(s + 14, buf, len); cmtp_send_capimsg(session, skb); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann20097.56%150.00%
Andrei Emeltchenko52.44%150.00%
Total205100.00%2100.00%


static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *skb) { struct capi_ctr *ctrl = &session->ctrl; struct cmtp_application *application; __u16 appl, msgnum, func, info; __u32 controller; BT_DBG("session %p skb %p len %d", session, skb, skb->len); switch (CAPIMSG_SUBCOMMAND(skb->data)) { case CAPI_CONF: if (skb->len < CAPI_MSG_BASELEN + 10) break; func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 5); info = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 8); switch (func) { case CAPI_FUNCTION_REGISTER: msgnum = CAPIMSG_MSGID(skb->data); application = cmtp_application_get(session, CMTP_MSGNUM, msgnum); if (application) { application->state = BT_CONNECTED; application->msgnum = 0; application->mapping = CAPIMSG_APPID(skb->data); wake_up_interruptible(&session->wait); } break; case CAPI_FUNCTION_RELEASE: appl = CAPIMSG_APPID(skb->data); application = cmtp_application_get(session, CMTP_MAPPING, appl); if (application) { application->state = BT_CLOSED; application->msgnum = 0; wake_up_interruptible(&session->wait); } break; case CAPI_FUNCTION_GET_PROFILE: if (skb->len < CAPI_MSG_BASELEN + 11 + sizeof(capi_profile)) break; controller = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 11); msgnum = CAPIMSG_MSGID(skb->data); if (!info && (msgnum == CMTP_INITIAL_MSGNUM)) { session->ncontroller = controller; wake_up_interruptible(&session->wait); break; } if (!info && ctrl) { memcpy(&ctrl->profile, skb->data + CAPI_MSG_BASELEN + 11, sizeof(capi_profile)); session->state = BT_CONNECTED; capi_ctr_ready(ctrl); } break; case CAPI_FUNCTION_GET_MANUFACTURER: if (skb->len < CAPI_MSG_BASELEN + 15) break; if (!info && ctrl) { int len = min_t(uint, CAPI_MANUFACTURER_LEN, skb->data[CAPI_MSG_BASELEN + 14]); memset(ctrl->manu, 0, CAPI_MANUFACTURER_LEN); strncpy(ctrl->manu, skb->data + CAPI_MSG_BASELEN + 15, len); } break; case CAPI_FUNCTION_GET_VERSION: if (skb->len < CAPI_MSG_BASELEN + 32) break; if (!info && ctrl) { ctrl->version.majorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 16); ctrl->version.minorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 20); ctrl->version.majormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 24); ctrl->version.minormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 28); } break; case CAPI_FUNCTION_GET_SERIAL_NUMBER: if (skb->len < CAPI_MSG_BASELEN + 17) break; if (!info && ctrl) { int len = min_t(uint, CAPI_SERIAL_LEN, skb->data[CAPI_MSG_BASELEN + 16]); memset(ctrl->serial, 0, CAPI_SERIAL_LEN); strncpy(ctrl->serial, skb->data + CAPI_MSG_BASELEN + 17, len); } break; } break; case CAPI_IND: if (skb->len < CAPI_MSG_BASELEN + 6) break; func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 3); if (func == CAPI_FUNCTION_LOOPBACK) { int len = min_t(uint, skb->len - CAPI_MSG_BASELEN - 6, skb->data[CAPI_MSG_BASELEN + 5]); appl = CAPIMSG_APPID(skb->data); msgnum = CAPIMSG_MSGID(skb->data); cmtp_send_interopmsg(session, CAPI_RESP, appl, msgnum, func, skb->data + CAPI_MSG_BASELEN + 6, len); } break; } kfree_skb(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann677100.00%2100.00%
Total677100.00%2100.00%


void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb) { struct capi_ctr *ctrl = &session->ctrl; struct cmtp_application *application; __u16 appl; __u32 contr; BT_DBG("session %p skb %p len %d", session, skb, skb->len); if (skb->len < CAPI_MSG_BASELEN) return; if (CAPIMSG_COMMAND(skb->data) == CAPI_INTEROPERABILITY) { cmtp_recv_interopmsg(session, skb); return; } if (session->flags & BIT(CMTP_LOOPBACK)) { kfree_skb(skb); return; } appl = CAPIMSG_APPID(skb->data); contr = CAPIMSG_CONTROL(skb->data); application = cmtp_application_get(session, CMTP_MAPPING, appl); if (application) { appl = application->appl; CAPIMSG_SETAPPID(skb->data, appl); } else { BT_ERR("Can't find application with id %d", appl); kfree_skb(skb); return; } if ((contr & 0x7f) == 0x01) { contr = (contr & 0xffffff80) | session->num; CAPIMSG_SETCONTROL(skb->data, contr); } capi_ctr_handle_message(ctrl, appl, skb); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann206100.00%3100.00%
Total206100.00%3100.00%


static int cmtp_load_firmware(struct capi_ctr *ctrl, capiloaddata *data) { BT_DBG("ctrl %p data %p", ctrl, data); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann27100.00%1100.00%
Total27100.00%1100.00%


static void cmtp_reset_ctr(struct capi_ctr *ctrl) { struct cmtp_session *session = ctrl->driverdata; BT_DBG("ctrl %p", ctrl); capi_ctr_down(ctrl); atomic_inc(&session->terminate); wake_up_process(session->task); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann3676.60%125.00%
Peter Hurley919.15%125.00%
Szymon Janc12.13%125.00%
Tilman Schmidt12.13%125.00%
Total47100.00%4100.00%


static void cmtp_register_appl(struct capi_ctr *ctrl, __u16 appl, capi_register_params *rp) { DECLARE_WAITQUEUE(wait, current); struct cmtp_session *session = ctrl->driverdata; struct cmtp_application *application; unsigned long timeo = CMTP_INTEROP_TIMEOUT; unsigned char buf[8]; int err = 0, nconn, want = rp->level3cnt; BT_DBG("ctrl %p appl %d level3cnt %d datablkcnt %d datablklen %d", ctrl, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen); application = cmtp_application_add(session, appl); if (!application) { BT_ERR("Can't allocate memory for new application"); return; } if (want < 0) nconn = ctrl->profile.nbchannel * -want; else nconn = want; if (nconn == 0) nconn = ctrl->profile.nbchannel; capimsg_setu16(buf, 0, nconn); capimsg_setu16(buf, 2, rp->datablkcnt); capimsg_setu16(buf, 4, rp->datablklen); application->state = BT_CONFIG; application->msgnum = cmtp_msgnum_get(session); cmtp_send_interopmsg(session, CAPI_REQ, 0x0000, application->msgnum, CAPI_FUNCTION_REGISTER, buf, 6); add_wait_queue(&session->wait, &wait); while (1) { set_current_state(TASK_INTERRUPTIBLE); if (!timeo) { err = -EAGAIN; break; } if (application->state == BT_CLOSED) { err = -application->err; break; } if (application->state == BT_CONNECTED) break; if (signal_pending(current)) { err = -EINTR; break; } timeo = schedule_timeout(timeo); } set_current_state(TASK_RUNNING); remove_wait_queue(&session->wait, &wait); if (err) { cmtp_application_del(session, application); return; } }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann323100.00%1100.00%
Total323100.00%1100.00%


static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl) { struct cmtp_session *session = ctrl->driverdata; struct cmtp_application *application; BT_DBG("ctrl %p appl %d", ctrl, appl); application = cmtp_application_get(session, CMTP_APPLID, appl); if (!application) { BT_ERR("Can't find application"); return; } application->msgnum = cmtp_msgnum_get(session); cmtp_send_interopmsg(session, CAPI_REQ, application->mapping, application->msgnum, CAPI_FUNCTION_RELEASE, NULL, 0); wait_event_interruptible_timeout(session->wait, (application->state == BT_CLOSED), CMTP_INTEROP_TIMEOUT); cmtp_application_del(session, application); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann115100.00%2100.00%
Total115100.00%2100.00%


static u16 cmtp_send_message(struct capi_ctr *ctrl, struct sk_buff *skb) { struct cmtp_session *session = ctrl->driverdata; struct cmtp_application *application; __u16 appl; __u32 contr; BT_DBG("ctrl %p skb %p", ctrl, skb); appl = CAPIMSG_APPID(skb->data); contr = CAPIMSG_CONTROL(skb->data); application = cmtp_application_get(session, CMTP_APPLID, appl); if ((!application) || (application->state != BT_CONNECTED)) { BT_ERR("Can't find application with id %d", appl); return CAPI_ILLAPPNR; } CAPIMSG_SETAPPID(skb->data, application->mapping); if ((contr & 0x7f) == session->num) { contr = (contr & 0xffffff80) | 0x01; CAPIMSG_SETCONTROL(skb->data, contr); } cmtp_send_capimsg(session, skb); return CAPI_NOERROR; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann155100.00%1100.00%
Total155100.00%1100.00%


static char *cmtp_procinfo(struct capi_ctr *ctrl) { return "CAPI Message Transport Protocol"; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann15100.00%1100.00%
Total15100.00%1100.00%


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; 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_entry(app, &session->applications, list) { seq_printf(m, "appl %d -> %d\n", app->appl, app->mapping); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann7474.00%133.33%
Alexey Dobriyan2222.00%133.33%
Geliang Tang44.00%133.33%
Total100100.00%3100.00%


static int cmtp_proc_open(struct inode *inode, struct file *file) { return single_open(file, cmtp_proc_show, PDE_DATA(inode)); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan2586.21%133.33%
Marcel Holtmann310.34%133.33%
Al Viro13.45%133.33%
Total29100.00%3100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann34199.13%266.67%
Alexey Dobriyan30.87%133.33%
Total344100.00%3100.00%


void cmtp_detach_device(struct cmtp_session *session) { BT_DBG("session %p", session); detach_capi_ctr(&session->ctrl); }

Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann25100.00%1100.00%
Total25100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Marcel Holtmann265595.40%637.50%
Alexey Dobriyan893.20%16.25%
Szymon Janc120.43%16.25%
Peter Hurley90.32%16.25%
Geliang Tang80.29%16.25%
Andrei Emeltchenko50.18%16.25%
Hideaki Yoshifuji / 吉藤英明10.04%16.25%
Syam Sidhardhan10.04%16.25%
Ingo Molnar10.04%16.25%
Tilman Schmidt10.04%16.25%
Al Viro10.04%16.25%
Total2783100.00%16100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.