From 447b27c4f29b510b98e99395120d635f009ed563 Mon Sep 17 00:00:00 2001 From: Christophe Ricard Date: Sun, 1 Feb 2015 22:26:16 +0100 Subject: NFC: Forward NFC_EVT_TRANSACTION to user space NFC_EVT_TRANSACTION is sent through netlink in order for a specific application running on a secure element to notify userspace of an event. Typically the secure element application counterpart on the host could interpret that event and act upon it. Forwarded information contains: - SE host generating the event - Application IDentifier doing the operation - Applications parameters Signed-off-by: Christophe Ricard Signed-off-by: Samuel Ortiz --- net/nfc/netlink.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) (limited to 'net/nfc/netlink.c') diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index be387e6219a0..14a2d11581da 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -497,6 +497,53 @@ free_msg: return -EMSGSIZE; } +int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx, + struct nfc_evt_transaction *evt_transaction) +{ + struct nfc_se *se; + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_SE_TRANSACTION); + if (!hdr) + goto free_msg; + + se = nfc_find_se(dev, se_idx); + if (!se) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) || + nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) || + nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) || + nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len, + evt_transaction->aid) || + nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len, + evt_transaction->params)) + goto nla_put_failure; + + /* evt_transaction is no more used */ + devm_kfree(&dev->dev, evt_transaction); + + genlmsg_end(msg, hdr); + + genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + /* evt_transaction is no more used */ + devm_kfree(&dev->dev, evt_transaction); + nlmsg_free(msg); + return -EMSGSIZE; +} + static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev, u32 portid, u32 seq, struct netlink_callback *cb, -- cgit v1.2.1