[RFC 14/14] NFC: st21nfca: Add support for HCI event transaction
From: Christophe Ricard <hidden>
Date: 2015-01-27 00:28:24
Subsystem:
nfc subsystem, the rest · Maintainers:
David Heidelberg, Linus Torvalds
The event transaction notifies the Device Host that an action is required to manage a specific Secure Element application. Signed-off-by: Christophe Ricard <redacted> --- drivers/nfc/st21nfca/st21nfca_se.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/drivers/nfc/st21nfca/st21nfca_se.c b/drivers/nfc/st21nfca/st21nfca_se.c
index 9b93d39..bd13cac 100644
--- a/drivers/nfc/st21nfca/st21nfca_se.c
+++ b/drivers/nfc/st21nfca/st21nfca_se.c@@ -301,6 +301,8 @@ int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host, u8 event, struct sk_buff *skb) { int r = 0; + struct device *dev = &hdev->ndev->dev; + struct nfc_evt_transaction *transaction; pr_debug("connectivity gate event: %x\n", event);
@@ -308,6 +310,25 @@ int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host, case ST21NFCA_EVT_CONNECTIVITY: break; case ST21NFCA_EVT_TRANSACTION: + if (skb->len < NFC_MIN_AID_LENGTH + 2 && + skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG) + return -EPROTO; + + transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev, + skb->len - 2, GFP_KERNEL); + + transaction->aid_len = skb->data[1]; + memcpy(transaction->aid, &skb->data[2], skb->data[1]); + + if (skb->data[transaction->aid_len + 2] != + NFC_EVT_TRANSACTION_PARAMS_TAG) + return -EPROTO; + + transaction->params_len = skb->data[transaction->aid_len + 3]; + memcpy(transaction->params, skb->data + + transaction->aid_len + 4, transaction->params_len); + + r = nfc_se_transaction(hdev->ndev, host, transaction); break; default: return 1;
--
2.1.0
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