| /* |
| HIDP implementation for Linux Bluetooth stack (BlueZ). |
| Copyright (C) 2003-2004 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/module.h> |
| #include <linux/file.h> |
| #include <linux/kthread.h> |
| #include <linux/hidraw.h> |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> |
| #include <net/bluetooth/l2cap.h> |
| |
| #include "hidp.h" |
| |
| #define VERSION "1.2" |
| |
| static DECLARE_RWSEM(hidp_session_sem); |
| static LIST_HEAD(hidp_session_list); |
| |
| static unsigned char hidp_keycode[256] = { |
| 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, |
| 37, 38, 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, |
| 21, 44, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, |
| 14, 15, 57, 12, 13, 26, 27, 43, 43, 39, 40, 41, 51, 52, |
| 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 87, 88, |
| 99, 70, 119, 110, 102, 104, 111, 107, 109, 106, 105, 108, 103, 69, |
| 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 72, 73, |
| 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190, |
| 191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135, |
| 136, 113, 115, 114, 0, 0, 0, 121, 0, 89, 93, 124, 92, 94, |
| 95, 0, 0, 0, 122, 123, 90, 91, 85, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 29, 42, 56, 125, 97, 54, 100, 126, 164, 166, 165, 163, 161, 115, |
| 114, 113, 150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140 |
| }; |
| |
| static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }; |
| |
| static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr) |
| { |
| struct hidp_session *session; |
| |
| BT_DBG(""); |
| |
| list_for_each_entry(session, &hidp_session_list, list) { |
| if (!bacmp(bdaddr, &session->bdaddr)) |
| return session; |
| } |
| |
| return NULL; |
| } |
| |
| static void __hidp_link_session(struct hidp_session *session) |
| { |
| list_add(&session->list, &hidp_session_list); |
| } |
| |
| static void __hidp_unlink_session(struct hidp_session *session) |
| { |
| hci_conn_put_device(session->conn); |
| |
| list_del(&session->list); |
| } |
| |
| static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci) |
| { |
| memset(ci, 0, sizeof(*ci)); |
| bacpy(&ci->bdaddr, &session->bdaddr); |
| |
| ci->flags = session->flags; |
| ci->state = session->state; |
| |
| ci->vendor = 0x0000; |
| ci->product = 0x0000; |
| ci->version = 0x0000; |
| |
| if (session->input) { |
| ci->vendor = session->input->id.vendor; |
| ci->product = session->input->id.product; |
| ci->version = session->input->id.version; |
| if (session->input->name) |
| strncpy(ci->name, session->input->name, 128); |
| else |
| strncpy(ci->name, "HID Boot Device", 128); |
| } |
| |
| if (session->hid) { |
| ci->vendor = session->hid->vendor; |
| ci->product = session->hid->product; |
| ci->version = session->hid->version; |
| strncpy(ci->name, session->hid->name, 128); |
| } |
| } |
| |
| static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev, |
| unsigned int type, unsigned int code, int value) |
| { |
| unsigned char newleds; |
| struct sk_buff *skb; |
| |
| BT_DBG("session %p type %d code %d value %d", session, type, code, value); |
| |
| if (type != EV_LED) |
| return -1; |
| |
| newleds = (!!test_bit(LED_KANA, dev->led) << 3) | |
| (!!test_bit(LED_COMPOSE, dev->led) << 3) | |
| (!!test_bit(LED_SCROLLL, dev->led) << 2) | |
| (!!test_bit(LED_CAPSL, dev->led) << 1) | |
| (!!test_bit(LED_NUML, dev->led)); |
| |
| if (session->leds == newleds) |
| return 0; |
| |
| session->leds = newleds; |
| |
| skb = alloc_skb(3, GFP_ATOMIC); |
| if (!skb) { |
| BT_ERR("Can't allocate memory for new frame"); |
| return -ENOMEM; |
| } |
| |
| *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; |
| *skb_put(skb, 1) = 0x01; |
| *skb_put(skb, 1) = newleds; |
| |
| skb_queue_tail(&session->intr_transmit, skb); |
| |
| hidp_schedule(session); |
| |
| return 0; |
| } |
| |
| static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
| { |
| struct hid_device *hid = input_get_drvdata(dev); |
| struct hidp_session *session = hid->driver_data; |
| |
| return hidp_queue_event(session, dev, type, code, value); |
| } |
| |
| static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
| { |
| struct hidp_session *session = input_get_drvdata(dev); |
| |
| return hidp_queue_event(session, dev, type, code, value); |
| } |
| |
| static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb) |
| { |
| struct input_dev *dev = session->input; |
| unsigned char *keys = session->keys; |
| unsigned char *udata = skb->data + 1; |
| signed char *sdata = skb->data + 1; |
| int i, size = skb->len - 1; |
| |
| switch (skb->data[0]) { |
| case 0x01: /* Keyboard report */ |
| for (i = 0; i < 8; i++) |
| input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1); |
| |
| /* If all the key codes have been set to 0x01, it means |
| * too many keys were pressed at the same time. */ |
| if (!memcmp(udata + 2, hidp_mkeyspat, 6)) |
| break; |
| |
| for (i = 2; i < 8; i++) { |
| if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) { |
| if (hidp_keycode[keys[i]]) |
| input_report_key(dev, hidp_keycode[keys[i]], 0); |
| else |
| BT_ERR("Unknown key (scancode %#x) released.", keys[i]); |
| } |
| |
| if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) { |
| if (hidp_keycode[udata[i]]) |
| input_report_key(dev, hidp_keycode[udata[i]], 1); |
| else |
| BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]); |
| } |
| } |
| |
| memcpy(keys, udata, 8); |
| break; |
| |
| case 0x02: /* Mouse report */ |
| input_report_key(dev, BTN_LEFT, sdata[0] & 0x01); |
| input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02); |
| input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04); |
| input_report_key(dev, BTN_SIDE, sdata[0] & 0x08); |
| input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10); |
| |
| input_report_rel(dev, REL_X, sdata[1]); |
| input_report_rel(dev, REL_Y, sdata[2]); |
| |
| if (size > 3) |
| input_report_rel(dev, REL_WHEEL, sdata[3]); |
| break; |
| } |
| |
| input_sync(dev); |
| } |
| |
| static int __hidp_send_ctrl_message(struct hidp_session *session, |
| unsigned char hdr, unsigned char *data, |
| int size) |
| { |
| struct sk_buff *skb; |
| |
| BT_DBG("session %p data %p size %d", session, data, size); |
| |
| if (atomic_read(&session->terminate)) |
| return -EIO; |
| |
| skb = alloc_skb(size + 1, GFP_ATOMIC); |
| if (!skb) { |
| BT_ERR("Can't allocate memory for new frame"); |
| return -ENOMEM; |
| } |
| |
| *skb_put(skb, 1) = hdr; |
| if (data && size > 0) |
| memcpy(skb_put(skb, size), data, size); |
| |
| skb_queue_tail(&session->ctrl_transmit, skb); |
| |
| return 0; |
| } |
| |
| static int hidp_send_ctrl_message(struct hidp_session *session, |
| unsigned char hdr, unsigned char *data, int size) |
| { |
| int err; |
| |
| err = __hidp_send_ctrl_message(session, hdr, data, size); |
| |
| hidp_schedule(session); |
| |
| return err; |
| } |
| |
| static int hidp_queue_report(struct hidp_session *session, |
| unsigned char *data, int size) |
| { |
| struct sk_buff *skb; |
| |
| BT_DBG("session %p hid %p data %p size %d", session, session->hid, data, size); |
| |
| skb = alloc_skb(size + 1, GFP_ATOMIC); |
| if (!skb) { |
| BT_ERR("Can't allocate memory for new frame"); |
| return -ENOMEM; |
| } |
| |
| *skb_put(skb, 1) = 0xa2; |
| if (size > 0) |
| memcpy(skb_put(skb, size), data, size); |
| |
| skb_queue_tail(&session->intr_transmit, skb); |
| |
| hidp_schedule(session); |
| |
| return 0; |
| } |
| |
| static int hidp_send_report(struct hidp_session *session, struct hid_report *report) |
| { |
| unsigned char buf[32]; |
| int rsize; |
| |
| rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0); |
| if (rsize > sizeof(buf)) |
| return -EIO; |
| |
| hid_output_report(report, buf); |
| |
| return hidp_queue_report(session, buf, rsize); |
| } |
| |
| static int hidp_get_raw_report(struct hid_device *hid, |
| unsigned char report_number, |
| unsigned char *data, size_t count, |
| unsigned char report_type) |
| { |
| struct hidp_session *session = hid->driver_data; |
| struct sk_buff *skb; |
| size_t len; |
| int numbered_reports = hid->report_enum[report_type].numbered; |
| int ret; |
| |
| switch (report_type) { |
| case HID_FEATURE_REPORT: |
| report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE; |
| break; |
| case HID_INPUT_REPORT: |
| report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT; |
| break; |
| case HID_OUTPUT_REPORT: |
| report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (mutex_lock_interruptible(&session->report_mutex)) |
| return -ERESTARTSYS; |
| |
| /* Set up our wait, and send the report request to the device. */ |
| session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK; |
| session->waiting_report_number = numbered_reports ? report_number : -1; |
| set_bit(HIDP_WAITING_FOR_RETURN, &session->flags); |
| data[0] = report_number; |
| ret = hidp_send_ctrl_message(hid->driver_data, report_type, data, 1); |
| if (ret) |
| goto err; |
| |
| /* Wait for the return of the report. The returned report |
| gets put in session->report_return. */ |
| while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) { |
| int res; |
| |
| res = wait_event_interruptible_timeout(session->report_queue, |
| !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags), |
| 5*HZ); |
| if (res == 0) { |
| /* timeout */ |
| ret = -EIO; |
| goto err; |
| } |
| if (res < 0) { |
| /* signal */ |
| ret = -ERESTARTSYS; |
| goto err; |
| } |
| } |
| |
| skb = session->report_return; |
| if (skb) { |
| len = skb->len < count ? skb->len : count; |
| memcpy(data, skb->data, len); |
| |
| kfree_skb(skb); |
| session->report_return = NULL; |
| } else { |
| /* Device returned a HANDSHAKE, indicating protocol error. */ |
| len = -EIO; |
| } |
| |
| clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); |
| mutex_unlock(&session->report_mutex); |
| |
| return len; |
| |
| err: |
| clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); |
| mutex_unlock(&session->report_mutex); |
| return ret; |
| } |
| |
| static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count, |
| unsigned char report_type) |
| { |
| struct hidp_session *session = hid->driver_data; |
| int ret; |
| |
| switch (report_type) { |
| case HID_FEATURE_REPORT: |
| report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE; |
| break; |
| case HID_OUTPUT_REPORT: |
| report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (mutex_lock_interruptible(&session->report_mutex)) |
| return -ERESTARTSYS; |
| |
| /* Set up our wait, and send the report request to the device. */ |
| set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); |
| ret = hidp_send_ctrl_message(hid->driver_data, report_type, data, |
| count); |
| if (ret) |
| goto err; |
| |
| /* Wait for the ACK from the device. */ |
| while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) { |
| int res; |
| |
| res = wait_event_interruptible_timeout(session->report_queue, |
| !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags), |
| 10*HZ); |
| if (res == 0) { |
| /* timeout */ |
| ret = -EIO; |
| goto err; |
| } |
| if (res < 0) { |
| /* signal */ |
| ret = -ERESTARTSYS; |
| goto err; |
| } |
| } |
| |
| if (!session->output_report_success) { |
| ret = -EIO; |
| goto err; |
| } |
| |
| ret = count; |
| |
| err: |
| clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); |
| mutex_unlock(&session->report_mutex); |
| return ret; |
| } |
| |
| static void hidp_idle_timeout(unsigned long arg) |
| { |
| struct hidp_session *session = (struct hidp_session *) arg; |
| |
| atomic_inc(&session->terminate); |
| wake_up_process(session->task); |
| } |
| |
| static void hidp_set_timer(struct hidp_session *session) |
| { |
| if (session->idle_to > 0) |
| mod_timer(&session->timer, jiffies + HZ * session->idle_to); |
| } |
| |
| static void hidp_del_timer(struct hidp_session *session) |
| { |
| if (session->idle_to > 0) |
| del_timer(&session->timer); |
| } |
| |
| static void hidp_process_handshake(struct hidp_session *session, |
| unsigned char param) |
| { |
| BT_DBG("session %p param 0x%02x", session, param); |
| session->output_report_success = 0; /* default condition */ |
| |
| switch (param) { |
| case HIDP_HSHK_SUCCESSFUL: |
| /* FIXME: Call into SET_ GET_ handlers here */ |
| session->output_report_success = 1; |
| break; |
| |
| case HIDP_HSHK_NOT_READY: |
| case HIDP_HSHK_ERR_INVALID_REPORT_ID: |
| case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST: |
| case HIDP_HSHK_ERR_INVALID_PARAMETER: |
| if (test_and_clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) |
| wake_up_interruptible(&session->report_queue); |
| |
| /* FIXME: Call into SET_ GET_ handlers here */ |
| break; |
| |
| case HIDP_HSHK_ERR_UNKNOWN: |
| break; |
| |
| case HIDP_HSHK_ERR_FATAL: |
| /* Device requests a reboot, as this is the only way this error |
| * can be recovered. */ |
| __hidp_send_ctrl_message(session, |
| HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0); |
| break; |
| |
| default: |
| __hidp_send_ctrl_message(session, |
| HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); |
| break; |
| } |
| |
| /* Wake up the waiting thread. */ |
| if (test_and_clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) |
| wake_up_interruptible(&session->report_queue); |
| } |
| |
| static void hidp_process_hid_control(struct hidp_session *session, |
| unsigned char param) |
| { |
| BT_DBG("session %p param 0x%02x", session, param); |
| |
| if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) { |
| /* Flush the transmit queues */ |
| skb_queue_purge(&session->ctrl_transmit); |
| skb_queue_purge(&session->intr_transmit); |
| |
| atomic_inc(&session->terminate); |
| wake_up_process(current); |
| } |
| } |
| |
| /* Returns true if the passed-in skb should be freed by the caller. */ |
| static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb, |
| unsigned char param) |
| { |
| int done_with_skb = 1; |
| BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param); |
| |
| switch (param) { |
| case HIDP_DATA_RTYPE_INPUT: |
| hidp_set_timer(session); |
| |
| if (session->input) |
| hidp_input_report(session, skb); |
| |
| if (session->hid) |
| hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0); |
| break; |
| |
| case HIDP_DATA_RTYPE_OTHER: |
| case HIDP_DATA_RTYPE_OUPUT: |
| case HIDP_DATA_RTYPE_FEATURE: |
| break; |
| |
| default: |
| __hidp_send_ctrl_message(session, |
| HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); |
| } |
| |
| if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && |
| param == session->waiting_report_type) { |
| if (session->waiting_report_number < 0 || |
| session->waiting_report_number == skb->data[0]) { |
| /* hidp_get_raw_report() is waiting on this report. */ |
| session->report_return = skb; |
| done_with_skb = 0; |
| clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); |
| wake_up_interruptible(&session->report_queue); |
| } |
| } |
| |
| return done_with_skb; |
| } |
| |
| static void hidp_recv_ctrl_frame(struct hidp_session *session, |
| struct sk_buff *skb) |
| { |
| unsigned char hdr, type, param; |
| int free_skb = 1; |
| |
| BT_DBG("session %p skb %p len %d", session, skb, skb->len); |
| |
| hdr = skb->data[0]; |
| skb_pull(skb, 1); |
| |
| type = hdr & HIDP_HEADER_TRANS_MASK; |
| param = hdr & HIDP_HEADER_PARAM_MASK; |
| |
| switch (type) { |
| case HIDP_TRANS_HANDSHAKE: |
| hidp_process_handshake(session, param); |
| break; |
| |
| case HIDP_TRANS_HID_CONTROL: |
| hidp_process_hid_control(session, param); |
| break; |
| |
| case HIDP_TRANS_DATA: |
| free_skb = hidp_process_data(session, skb, param); |
| break; |
| |
| default: |
| __hidp_send_ctrl_message(session, |
| HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0); |
| break; |
| } |
| |
| if (free_skb) |
| kfree_skb(skb); |
| } |
| |
| static void hidp_recv_intr_frame(struct hidp_session *session, |
| struct sk_buff *skb) |
| { |
| unsigned char hdr; |
| |
| BT_DBG("session %p skb %p len %d", session, skb, skb->len); |
| |
| hdr = skb->data[0]; |
| skb_pull(skb, 1); |
| |
| if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) { |
| hidp_set_timer(session); |
| |
| if (session->input) |
| hidp_input_report(session, skb); |
| |
| if (session->hid) { |
| hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1); |
| BT_DBG("report len %d", skb->len); |
| } |
| } else { |
| BT_DBG("Unsupported protocol header 0x%02x", hdr); |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) |
| { |
| struct kvec iv = { data, len }; |
| struct msghdr msg; |
| |
| BT_DBG("sock %p data %p len %d", sock, data, len); |
| |
| if (!len) |
| return 0; |
| |
| memset(&msg, 0, sizeof(msg)); |
| |
| return kernel_sendmsg(sock, &msg, &iv, 1, len); |
| } |
| |
| static void hidp_process_intr_transmit(struct hidp_session *session) |
| { |
| struct sk_buff *skb; |
| |
| BT_DBG("session %p", session); |
| |
| while ((skb = skb_dequeue(&session->intr_transmit))) { |
| if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) { |
| skb_queue_head(&session->intr_transmit, skb); |
| break; |
| } |
| |
| hidp_set_timer(session); |
| kfree_skb(skb); |
| } |
| } |
| |
| static void hidp_process_ctrl_transmit(struct hidp_session *session) |
| { |
| struct sk_buff *skb; |
| |
| BT_DBG("session %p", session); |
| |
| while ((skb = skb_dequeue(&session->ctrl_transmit))) { |
| if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) { |
| skb_queue_head(&session->ctrl_transmit, skb); |
| break; |
| } |
| |
| hidp_set_timer(session); |
| kfree_skb(skb); |
| } |
| } |
| |
| static int hidp_session(void *arg) |
| { |
| struct hidp_session *session = arg; |
| struct sock *ctrl_sk = session->ctrl_sock->sk; |
| struct sock *intr_sk = session->intr_sock->sk; |
| struct sk_buff *skb; |
| wait_queue_t ctrl_wait, intr_wait; |
| |
| BT_DBG("session %p", session); |
| |
| __module_get(THIS_MODULE); |
| set_user_nice(current, -15); |
| |
| init_waitqueue_entry(&ctrl_wait, current); |
| init_waitqueue_entry(&intr_wait, current); |
| add_wait_queue(sk_sleep(ctrl_sk), &ctrl_wait); |
| add_wait_queue(sk_sleep(intr_sk), &intr_wait); |
| session->waiting_for_startup = 0; |
| wake_up_interruptible(&session->startup_queue); |
| set_current_state(TASK_INTERRUPTIBLE); |
| while (!atomic_read(&session->terminate)) { |
| if (ctrl_sk->sk_state != BT_CONNECTED || |
| intr_sk->sk_state != BT_CONNECTED) |
| break; |
| |
| while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) { |
| skb_orphan(skb); |
| if (!skb_linearize(skb)) |
| hidp_recv_intr_frame(session, skb); |
| else |
| kfree_skb(skb); |
| } |
| |
| hidp_process_intr_transmit(session); |
| |
| while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) { |
| skb_orphan(skb); |
| if (!skb_linearize(skb)) |
| hidp_recv_ctrl_frame(session, skb); |
| else |
| kfree_skb(skb); |
| } |
| |
| hidp_process_ctrl_transmit(session); |
| |
| schedule(); |
| set_current_state(TASK_INTERRUPTIBLE); |
| } |
| set_current_state(TASK_RUNNING); |
| remove_wait_queue(sk_sleep(intr_sk), &intr_wait); |
| remove_wait_queue(sk_sleep(ctrl_sk), &ctrl_wait); |
| |
| clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); |
| clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); |
| wake_up_interruptible(&session->report_queue); |
| |
| down_write(&hidp_session_sem); |
| |
| hidp_del_timer(session); |
| |
| if (session->input) { |
| input_unregister_device(session->input); |
| session->input = NULL; |
| } |
| |
| if (session->hid) { |
| hid_destroy_device(session->hid); |
| session->hid = NULL; |
| } |
| |
| /* Wakeup user-space polling for socket errors */ |
| session->intr_sock->sk->sk_err = EUNATCH; |
| session->ctrl_sock->sk->sk_err = EUNATCH; |
| |
| hidp_schedule(session); |
| |
| fput(session->intr_sock->file); |
| |
| wait_event_timeout(*(sk_sleep(ctrl_sk)), |
| (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500)); |
| |
| fput(session->ctrl_sock->file); |
| |
| __hidp_unlink_session(session); |
| |
| up_write(&hidp_session_sem); |
| |
| kfree(session->rd_data); |
| kfree(session); |
| module_put_and_exit(0); |
| return 0; |
| } |
| |
| static struct hci_conn *hidp_get_connection(struct hidp_session *session) |
| { |
| bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src; |
| bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst; |
| struct hci_conn *conn; |
| struct hci_dev *hdev; |
| |
| hdev = hci_get_route(dst, src); |
| if (!hdev) |
| return NULL; |
| |
| hci_dev_lock(hdev); |
| conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); |
| if (conn) |
| hci_conn_hold_device(conn); |
| hci_dev_unlock(hdev); |
| |
| hci_dev_put(hdev); |
| |
| return conn; |
| } |
| |
| static int hidp_setup_input(struct hidp_session *session, |
| struct hidp_connadd_req *req) |
| { |
| struct input_dev *input; |
| int i; |
| |
| input = input_allocate_device(); |
| if (!input) |
| return -ENOMEM; |
| |
| session->input = input; |
| |
| input_set_drvdata(input, session); |
| |
| input->name = "Bluetooth HID Boot Protocol Device"; |
| |
| input->id.bustype = BUS_BLUETOOTH; |
| input->id.vendor = req->vendor; |
| input->id.product = req->product; |
| input->id.version = req->version; |
| |
| if (req->subclass & 0x40) { |
| set_bit(EV_KEY, input->evbit); |
| set_bit(EV_LED, input->evbit); |
| set_bit(EV_REP, input->evbit); |
| |
| set_bit(LED_NUML, input->ledbit); |
| set_bit(LED_CAPSL, input->ledbit); |
| set_bit(LED_SCROLLL, input->ledbit); |
| set_bit(LED_COMPOSE, input->ledbit); |
| set_bit(LED_KANA, input->ledbit); |
| |
| for (i = 0; i < sizeof(hidp_keycode); i++) |
| set_bit(hidp_keycode[i], input->keybit); |
| clear_bit(0, input->keybit); |
| } |
| |
| if (req->subclass & 0x80) { |
| input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); |
| input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | |
| BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); |
| input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); |
| input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | |
| BIT_MASK(BTN_EXTRA); |
| input->relbit[0] |= BIT_MASK(REL_WHEEL); |
| } |
| |
| input->dev.parent = &session->conn->dev; |
| |
| input->event = hidp_input_event; |
| |
| return 0; |
| } |
| |
| static int hidp_open(struct hid_device *hid) |
| { |
| return 0; |
| } |
| |
| static void hidp_close(struct hid_device *hid) |
| { |
| } |
| |
| static int hidp_parse(struct hid_device *hid) |
| { |
| struct hidp_session *session = hid->driver_data; |
| |
| return hid_parse_report(session->hid, session->rd_data, |
| session->rd_size); |
| } |
| |
| static int hidp_start(struct hid_device *hid) |
| { |
| struct hidp_session *session = hid->driver_data; |
| struct hid_report *report; |
| |
| if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) |
| return 0; |
| |
| list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT]. |
| report_list, list) |
| hidp_send_report(session, report); |
| |
| list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT]. |
| report_list, list) |
| hidp_send_report(session, report); |
| |
| return 0; |
| } |
| |
| static void hidp_stop(struct hid_device *hid) |
| { |
| struct hidp_session *session = hid->driver_data; |
| |
| skb_queue_purge(&session->ctrl_transmit); |
| skb_queue_purge(&session->intr_transmit); |
| |
| hid->claimed = 0; |
| } |
| |
| static struct hid_ll_driver hidp_hid_driver = { |
| .parse = hidp_parse, |
| .start = hidp_start, |
| .stop = hidp_stop, |
| .open = hidp_open, |
| .close = hidp_close, |
| .hidinput_input_event = hidp_hidinput_event, |
| }; |
| |
| /* This function sets up the hid device. It does not add it |
| to the HID system. That is done in hidp_add_connection(). */ |
| static int hidp_setup_hid(struct hidp_session *session, |
| struct hidp_connadd_req *req) |
| { |
| struct hid_device *hid; |
| int err; |
| |
| session->rd_data = kzalloc(req->rd_size, GFP_KERNEL); |
| if (!session->rd_data) |
| return -ENOMEM; |
| |
| if (copy_from_user(session->rd_data, req->rd_data, req->rd_size)) { |
| err = -EFAULT; |
| goto fault; |
| } |
| session->rd_size = req->rd_size; |
| |
| hid = hid_allocate_device(); |
| if (IS_ERR(hid)) { |
| err = PTR_ERR(hid); |
| goto fault; |
| } |
| |
| session->hid = hid; |
| |
| hid->driver_data = session; |
| |
| hid->bus = BUS_BLUETOOTH; |
| hid->vendor = req->vendor; |
| hid->product = req->product; |
| hid->version = req->version; |
| hid->country = req->country; |
| |
| strncpy(hid->name, req->name, 128); |
| |
| snprintf(hid->phys, sizeof(hid->phys), "%pMR", |
| &bt_sk(session->ctrl_sock->sk)->src); |
| |
| snprintf(hid->uniq, sizeof(hid->uniq), "%pMR", |
| &bt_sk(session->ctrl_sock->sk)->dst); |
| |
| hid->dev.parent = &session->conn->dev; |
| hid->ll_driver = &hidp_hid_driver; |
| |
| hid->hid_get_raw_report = hidp_get_raw_report; |
| hid->hid_output_raw_report = hidp_output_raw_report; |
| |
| return 0; |
| |
| fault: |
| kfree(session->rd_data); |
| session->rd_data = NULL; |
| |
| return err; |
| } |
| |
| int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock) |
| { |
| struct hidp_session *session, *s; |
| int vendor, product; |
| int err; |
| |
| BT_DBG(""); |
| |
| if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) || |
| bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst)) |
| return -ENOTUNIQ; |
| |
| BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size); |
| |
| down_write(&hidp_session_sem); |
| |
| s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst); |
| if (s && s->state == BT_CONNECTED) { |
| up_write(&hidp_session_sem); |
| return -EEXIST; |
| } |
| |
| session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL); |
| if (!session) { |
| up_write(&hidp_session_sem); |
| return -ENOMEM; |
| } |
| |
| bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst); |
| |
| session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->chan->omtu, |
| l2cap_pi(ctrl_sock->sk)->chan->imtu); |
| session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->chan->omtu, |
| l2cap_pi(intr_sock->sk)->chan->imtu); |
| |
| BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu); |
| |
| session->ctrl_sock = ctrl_sock; |
| session->intr_sock = intr_sock; |
| session->state = BT_CONNECTED; |
| |
| session->conn = hidp_get_connection(session); |
| if (!session->conn) { |
| err = -ENOTCONN; |
| goto failed; |
| } |
| |
| setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session); |
| |
| skb_queue_head_init(&session->ctrl_transmit); |
| skb_queue_head_init(&session->intr_transmit); |
| |
| mutex_init(&session->report_mutex); |
| init_waitqueue_head(&session->report_queue); |
| init_waitqueue_head(&session->startup_queue); |
| session->waiting_for_startup = 1; |
| session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID); |
| session->idle_to = req->idle_to; |
| |
| __hidp_link_session(session); |
| |
| if (req->rd_size > 0) { |
| err = hidp_setup_hid(session, req); |
| if (err) |
| goto purge; |
| } |
| |
| if (!session->hid) { |
| err = hidp_setup_input(session, req); |
| if (err < 0) |
| goto purge; |
| } |
| |
| hidp_set_timer(session); |
| |
| if (session->hid) { |
| vendor = session->hid->vendor; |
| product = session->hid->product; |
| } else if (session->input) { |
| vendor = session->input->id.vendor; |
| product = session->input->id.product; |
| } else { |
| vendor = 0x0000; |
| product = 0x0000; |
| } |
| |
| session->task = kthread_run(hidp_session, session, "khidpd_%04x%04x", |
| vendor, product); |
| if (IS_ERR(session->task)) { |
| err = PTR_ERR(session->task); |
| goto unlink; |
| } |
| |
| while (session->waiting_for_startup) { |
| wait_event_interruptible(session->startup_queue, |
| !session->waiting_for_startup); |
| } |
| |
| if (session->hid) |
| err = hid_add_device(session->hid); |
| else |
| err = input_register_device(session->input); |
| |
| if (err < 0) { |
| atomic_inc(&session->terminate); |
| wake_up_process(session->task); |
| up_write(&hidp_session_sem); |
| return err; |
| } |
| |
| if (session->input) { |
| hidp_send_ctrl_message(session, |
| HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0); |
| session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE); |
| |
| session->leds = 0xff; |
| hidp_input_event(session->input, EV_LED, 0, 0); |
| } |
| |
| up_write(&hidp_session_sem); |
| return 0; |
| |
| unlink: |
| hidp_del_timer(session); |
| |
| if (session->input) { |
| input_unregister_device(session->input); |
| session->input = NULL; |
| } |
| |
| if (session->hid) { |
| hid_destroy_device(session->hid); |
| session->hid = NULL; |
| } |
| |
| kfree(session->rd_data); |
| session->rd_data = NULL; |
| |
| purge: |
| __hidp_unlink_session(session); |
| |
| skb_queue_purge(&session->ctrl_transmit); |
| skb_queue_purge(&session->intr_transmit); |
| |
| failed: |
| up_write(&hidp_session_sem); |
| |
| kfree(session); |
| return err; |
| } |
| |
| int hidp_del_connection(struct hidp_conndel_req *req) |
| { |
| struct hidp_session *session; |
| int err = 0; |
| |
| BT_DBG(""); |
| |
| down_read(&hidp_session_sem); |
| |
| session = __hidp_get_session(&req->bdaddr); |
| if (session) { |
| if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) { |
| hidp_send_ctrl_message(session, |
| HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0); |
| } else { |
| /* Flush the transmit queues */ |
| skb_queue_purge(&session->ctrl_transmit); |
| skb_queue_purge(&session->intr_transmit); |
| |
| atomic_inc(&session->terminate); |
| wake_up_process(session->task); |
| } |
| } else |
| err = -ENOENT; |
| |
| up_read(&hidp_session_sem); |
| return err; |
| } |
| |
| int hidp_get_connlist(struct hidp_connlist_req *req) |
| { |
| struct hidp_session *session; |
| int err = 0, n = 0; |
| |
| BT_DBG(""); |
| |
| down_read(&hidp_session_sem); |
| |
| list_for_each_entry(session, &hidp_session_list, list) { |
| struct hidp_conninfo ci; |
| |
| __hidp_copy_session(session, &ci); |
| |
| if (copy_to_user(req->ci, &ci, sizeof(ci))) { |
| err = -EFAULT; |
| break; |
| } |
| |
| if (++n >= req->cnum) |
| break; |
| |
| req->ci++; |
| } |
| req->cnum = n; |
| |
| up_read(&hidp_session_sem); |
| return err; |
| } |
| |
| int hidp_get_conninfo(struct hidp_conninfo *ci) |
| { |
| struct hidp_session *session; |
| int err = 0; |
| |
| down_read(&hidp_session_sem); |
| |
| session = __hidp_get_session(&ci->bdaddr); |
| if (session) |
| __hidp_copy_session(session, ci); |
| else |
| err = -ENOENT; |
| |
| up_read(&hidp_session_sem); |
| return err; |
| } |
| |
| static int __init hidp_init(void) |
| { |
| BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION); |
| |
| return hidp_init_sockets(); |
| } |
| |
| static void __exit hidp_exit(void) |
| { |
| hidp_cleanup_sockets(); |
| } |
| |
| module_init(hidp_init); |
| module_exit(hidp_exit); |
| |
| MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
| MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION); |
| MODULE_VERSION(VERSION); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("bt-proto-6"); |