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Bluetooth: mgmt: Centralize message length checks

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This patch moves the command length information into the command handler
table allowing the removal of length checks from the handler functions
and doing the check in a single place before calling the handler
function.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2012-03-01 22:24:41 +02:00
parent 9d1acbfb77
commit be22b54e87
1 changed files with 52 additions and 168 deletions
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220
net/bluetooth/mgmt.c
View File

@ -751,10 +751,6 @@ static int set_powered(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_POWERED,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
@ -846,10 +842,6 @@ static int set_discoverable(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
MGMT_STATUS_INVALID_PARAMS);
timeout = get_unaligned_le16(&cp->timeout);
if (!cp->val && timeout > 0)
return cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
@ -945,10 +937,6 @@ static int set_connectable(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -1019,10 +1007,6 @@ static int set_pairable(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_PAIRABLE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (cp->val)
@ -1051,10 +1035,6 @@ static int set_link_security(struct sock *sk, struct hci_dev *hdev,
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_LINK_SECURITY,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -1115,10 +1095,6 @@ static int set_ssp(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_SSP,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!(hdev->features[6] & LMP_SIMPLE_PAIR)) {
@ -1181,10 +1157,6 @@ static int set_hs(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
MGMT_STATUS_INVALID_PARAMS);
if (!enable_hs)
return cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
MGMT_STATUS_NOT_SUPPORTED);
@ -1207,10 +1179,6 @@ static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!enable_le || !(hdev->features[4] & LMP_LE)) {
@ -1280,10 +1248,6 @@ static int add_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_ADD_UUID,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) {
@ -1353,10 +1317,6 @@ static int remove_uuid(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_REMOVE_UUID,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) {
@ -1430,10 +1390,6 @@ static int set_dev_class(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("request for %s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (test_bit(HCI_PENDING_CLASS, &hdev->dev_flags)) {
@ -1486,10 +1442,6 @@ static int load_link_keys(struct sock *sk, struct hci_dev *hdev, void *data,
u16 key_count, expected_len;
int i;
if (len < sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
MGMT_STATUS_INVALID_PARAMS);
key_count = get_unaligned_le16(&cp->key_count);
expected_len = sizeof(*cp) + key_count *
@ -1551,10 +1503,6 @@ static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data,
struct hci_conn *conn;
int err;
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
memset(&rp, 0, sizeof(rp));
@ -1627,10 +1575,6 @@ static int disconnect(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_DISCONNECT,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!test_bit(HCI_UP, &hdev->flags)) {
@ -1781,10 +1725,6 @@ static int pin_code_reply(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_REPLY,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -1842,10 +1782,6 @@ static int pin_code_neg_reply(struct sock *sk, struct hci_dev *hdev,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_NEG_REPLY,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -1868,10 +1804,6 @@ static int set_io_capability(struct sock *sk, struct hci_dev *hdev,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_IO_CAPABILITY,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
hdev->io_capability = cp->io_capability;
@ -1949,10 +1881,6 @@ static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -2029,10 +1957,6 @@ static int cancel_pair_device(struct sock *sk, struct hci_dev *hdev,
BT_DBG("");
if (len != sizeof(*addr))
return cmd_status(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -2153,10 +2077,6 @@ static int user_confirm_neg_reply(struct sock *sk, struct hci_dev *hdev,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_USER_CONFIRM_NEG_REPLY,
MGMT_STATUS_INVALID_PARAMS);
return user_pairing_resp(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
MGMT_OP_USER_CONFIRM_NEG_REPLY,
HCI_OP_USER_CONFIRM_NEG_REPLY, 0);
@ -2169,10 +2089,6 @@ static int user_passkey_reply(struct sock *sk, struct hci_dev *hdev,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_USER_PASSKEY_REPLY,
EINVAL);
return user_pairing_resp(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
MGMT_OP_USER_PASSKEY_REPLY,
HCI_OP_USER_PASSKEY_REPLY,
@ -2186,10 +2102,6 @@ static int user_passkey_neg_reply(struct sock *sk, struct hci_dev *hdev,
BT_DBG("");
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_USER_PASSKEY_NEG_REPLY,
EINVAL);
return user_pairing_resp(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
MGMT_OP_USER_PASSKEY_NEG_REPLY,
HCI_OP_USER_PASSKEY_NEG_REPLY, 0);
@ -2205,10 +2117,6 @@ static int set_local_name(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("");
if (len != sizeof(*mgmt_cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_LOCAL_NAME,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
memcpy(hdev->short_name, mgmt_cp->short_name,
@ -2297,10 +2205,6 @@ static int add_remote_oob_data(struct sock *sk, struct hci_dev *hdev,
BT_DBG("%s ", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_ADD_REMOTE_OOB_DATA,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -2334,10 +2238,6 @@ static int remove_remote_oob_data(struct sock *sk, struct hci_dev *hdev,
BT_DBG("%s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_REMOVE_REMOTE_OOB_DATA,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -2388,10 +2288,6 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
BT_DBG("%s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_START_DISCOVERY,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
@ -2463,10 +2359,6 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("%s", hdev->name);
if (len != sizeof(*mgmt_cp))
return cmd_status(sk, hdev->id, MGMT_OP_STOP_DISCOVERY,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hci_discovery_active(hdev)) {
@ -2529,10 +2421,6 @@ static int confirm_name(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("%s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_CONFIRM_NAME,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
if (!hci_discovery_active(hdev)) {
@ -2572,10 +2460,6 @@ static int block_device(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("%s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_BLOCK_DEVICE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
err = hci_blacklist_add(hdev, &cp->addr.bdaddr, cp->addr.type);
@ -2601,10 +2485,6 @@ static int unblock_device(struct sock *sk, struct hci_dev *hdev, void *data,
BT_DBG("%s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_UNBLOCK_DEVICE,
MGMT_STATUS_INVALID_PARAMS);
hci_dev_lock(hdev);
err = hci_blacklist_del(hdev, &cp->addr.bdaddr, cp->addr.type);
@ -2631,10 +2511,6 @@ static int set_fast_connectable(struct sock *sk, struct hci_dev *hdev,
BT_DBG("%s", hdev->name);
if (len != sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
MGMT_STATUS_INVALID_PARAMS);
if (!hdev_is_powered(hdev))
return cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
MGMT_STATUS_NOT_POWERED);
@ -2684,10 +2560,6 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
u16 key_count, expected_len;
int i;
if (len < sizeof(*cp))
return cmd_status(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS,
EINVAL);
key_count = get_unaligned_le16(&cp->key_count);
expected_len = sizeof(*cp) + key_count *
@ -2727,47 +2599,49 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
struct mgmt_handler {
int (*func) (struct sock *sk, struct hci_dev *hdev,
void *data, u16 data_len);
bool var_len;
size_t data_len;
} mgmt_handlers[] = {
{ NULL }, /* 0x0000 (no command) */
{ read_version, },
{ read_commands, },
{ read_index_list, },
{ read_controller_info, },
{ set_powered, },
{ set_discoverable, },
{ set_connectable, },
{ set_fast_connectable, },
{ set_pairable, },
{ set_link_security, },
{ set_ssp, },
{ set_hs, },
{ set_le, },
{ set_dev_class, },
{ set_local_name, },
{ add_uuid, },
{ remove_uuid, },
{ load_link_keys, },
{ load_long_term_keys, },
{ disconnect, },
{ get_connections, },
{ pin_code_reply, },
{ pin_code_neg_reply, },
{ set_io_capability, },
{ pair_device, },
{ cancel_pair_device, },
{ unpair_device, },
{ user_confirm_reply, },
{ user_confirm_neg_reply, },
{ user_passkey_reply, },
{ user_passkey_neg_reply, },
{ read_local_oob_data, },
{ add_remote_oob_data, },
{ remove_remote_oob_data, },
{ start_discovery, },
{ stop_discovery, },
{ confirm_name, },
{ block_device, },
{ unblock_device, },
{ read_version, false, MGMT_READ_VERSION_SIZE },
{ read_commands, false, MGMT_READ_COMMANDS_SIZE },
{ read_index_list, false, MGMT_READ_INDEX_LIST_SIZE },
{ read_controller_info, false, MGMT_READ_INFO_SIZE },
{ set_powered, false, MGMT_SETTING_SIZE },
{ set_discoverable, false, MGMT_SET_DISCOVERABLE_SIZE },
{ set_connectable, false, MGMT_SETTING_SIZE },
{ set_fast_connectable, false, MGMT_SETTING_SIZE },
{ set_pairable, false, MGMT_SETTING_SIZE },
{ set_link_security, false, MGMT_SETTING_SIZE },
{ set_ssp, false, MGMT_SETTING_SIZE },
{ set_hs, false, MGMT_SETTING_SIZE },
{ set_le, false, MGMT_SETTING_SIZE },
{ set_dev_class, false, MGMT_SET_DEV_CLASS_SIZE },
{ set_local_name, false, MGMT_SET_LOCAL_NAME_SIZE },
{ add_uuid, false, MGMT_ADD_UUID_SIZE },
{ remove_uuid, false, MGMT_REMOVE_UUID_SIZE },
{ load_link_keys, true, MGMT_LOAD_LINK_KEYS_SIZE },
{ load_long_term_keys, true, MGMT_LOAD_LONG_TERM_KEYS_SIZE },
{ disconnect, false, MGMT_DISCONNECT_SIZE },
{ get_connections, false, MGMT_GET_CONNECTIONS_SIZE },
{ pin_code_reply, false, MGMT_PIN_CODE_REPLY_SIZE },
{ pin_code_neg_reply, false, MGMT_PIN_CODE_NEG_REPLY_SIZE },
{ set_io_capability, false, MGMT_SET_IO_CAPABILITY_SIZE },
{ pair_device, false, MGMT_PAIR_DEVICE_SIZE },
{ cancel_pair_device, false, MGMT_CANCEL_PAIR_DEVICE_SIZE },
{ unpair_device, false, MGMT_UNPAIR_DEVICE_SIZE },
{ user_confirm_reply, false, MGMT_USER_CONFIRM_REPLY_SIZE },
{ user_confirm_neg_reply, false, MGMT_USER_CONFIRM_NEG_REPLY_SIZE },
{ user_passkey_reply, false, MGMT_USER_PASSKEY_REPLY_SIZE },
{ user_passkey_neg_reply, false, MGMT_USER_PASSKEY_NEG_REPLY_SIZE },
{ read_local_oob_data, false, MGMT_READ_LOCAL_OOB_DATA_SIZE },
{ add_remote_oob_data, false, MGMT_ADD_REMOTE_OOB_DATA_SIZE },
{ remove_remote_oob_data, false, MGMT_REMOVE_REMOTE_OOB_DATA_SIZE },
{ start_discovery, false, MGMT_START_DISCOVERY_SIZE },
{ stop_discovery, false, MGMT_STOP_DISCOVERY_SIZE },
{ confirm_name, false, MGMT_CONFIRM_NAME_SIZE },
{ block_device, false, MGMT_BLOCK_DEVICE_SIZE },
{ unblock_device, false, MGMT_UNBLOCK_DEVICE_SIZE },
};
@ -2778,6 +2652,7 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
struct mgmt_hdr *hdr;
u16 opcode, index, len;
struct hci_dev *hdev = NULL;
struct mgmt_handler *handler;
int err;
BT_DBG("got %zu bytes", msglen);
@ -2828,12 +2703,21 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
goto done;
}
handler = &mgmt_handlers[opcode];
if ((handler->var_len && len < handler->data_len) ||
(!handler->var_len && len != handler->data_len)) {
err = cmd_status(sk, index, opcode,
MGMT_STATUS_INVALID_PARAMS);
goto done;
}
if (hdev)
mgmt_init_hdev(sk, hdev);
cp = buf + sizeof(*hdr);
err = mgmt_handlers[opcode].func(sk, hdev, cp, len);
err = handler->func(sk, hdev, cp, len);
if (err < 0)
goto done;