diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/bluetooth/hci_h4.c | 98 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_uart.h | 3 |
2 files changed, 101 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c index 97a5df4941b4..09270bc26654 100644 --- a/drivers/bluetooth/hci_h4.c +++ b/drivers/bluetooth/hci_h4.c @@ -161,3 +161,101 @@ int __exit h4_deinit(void) { return hci_uart_unregister_proto(&h4p); } + +struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb, + const unsigned char *buffer, int count) +{ + while (count) { + int len; + + if (!skb) { + switch (buffer[0]) { + case HCI_ACLDATA_PKT: + skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, + GFP_ATOMIC); + if (!skb) + return ERR_PTR(-ENOMEM); + + bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; + bt_cb(skb)->expect = HCI_ACL_HDR_SIZE; + break; + case HCI_SCODATA_PKT: + skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, + GFP_ATOMIC); + if (!skb) + return ERR_PTR(-ENOMEM); + + bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; + bt_cb(skb)->expect = HCI_SCO_HDR_SIZE; + break; + case HCI_EVENT_PKT: + skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, + GFP_ATOMIC); + if (!skb) + return ERR_PTR(-ENOMEM); + + bt_cb(skb)->pkt_type = HCI_EVENT_PKT; + bt_cb(skb)->expect = HCI_EVENT_HDR_SIZE; + break; + default: + return ERR_PTR(-EILSEQ); + } + + count -= 1; + buffer += 1; + } + + len = min_t(uint, bt_cb(skb)->expect, count); + memcpy(skb_put(skb, len), buffer, len); + + count -= len; + buffer += len; + bt_cb(skb)->expect -= len; + + switch (bt_cb(skb)->pkt_type) { + case HCI_ACLDATA_PKT: + if (skb->len == HCI_ACL_HDR_SIZE) { + __le16 dlen = hci_acl_hdr(skb)->dlen; + + /* Complete ACL header */ + bt_cb(skb)->expect = __le16_to_cpu(dlen); + + if (skb_tailroom(skb) < bt_cb(skb)->expect) { + kfree_skb(skb); + return ERR_PTR(-EMSGSIZE); + } + } + break; + case HCI_SCODATA_PKT: + if (skb->len == HCI_SCO_HDR_SIZE) { + /* Complete SCO header */ + bt_cb(skb)->expect = hci_sco_hdr(skb)->dlen; + + if (skb_tailroom(skb) < bt_cb(skb)->expect) { + kfree_skb(skb); + return ERR_PTR(-EMSGSIZE); + } + } + break; + case HCI_EVENT_PKT: + if (skb->len == HCI_EVENT_HDR_SIZE) { + /* Complete event header */ + bt_cb(skb)->expect = hci_event_hdr(skb)->plen; + + if (skb_tailroom(skb) < bt_cb(skb)->expect) { + kfree_skb(skb); + return ERR_PTR(-EMSGSIZE); + } + } + break; + } + + if (bt_cb(skb)->expect == 0) { + /* Complete frame */ + hci_recv_frame(hdev, skb); + skb = NULL; + } + } + + return skb; +} diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index 79bbcefb0112..53b329229f2e 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -99,6 +99,9 @@ int hci_uart_init_ready(struct hci_uart *hu); #ifdef CONFIG_BT_HCIUART_H4 int h4_init(void); int h4_deinit(void); + +struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb, + const unsigned char *buffer, int count); #endif #ifdef CONFIG_BT_HCIUART_BCSP |