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author | Christophe Ricard <christophe.ricard@gmail.com> | 2015-02-01 22:26:16 +0100 |
---|---|---|
committer | Samuel Ortiz <sameo@linux.intel.com> | 2015-02-02 21:50:40 +0100 |
commit | 447b27c4f29b510b98e99395120d635f009ed563 (patch) | |
tree | 07c6b790944aa9bb1c3a44e7f7f93da03982735c /net | |
parent | 8ae01f7967718ac9ed800a99964f88c0c8b07e11 (diff) | |
download | op-kernel-dev-447b27c4f29b510b98e99395120d635f009ed563.zip op-kernel-dev-447b27c4f29b510b98e99395120d635f009ed563.tar.gz |
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 <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net')
-rw-r--r-- | net/nfc/core.c | 21 | ||||
-rw-r--r-- | net/nfc/netlink.c | 47 | ||||
-rw-r--r-- | net/nfc/nfc.h | 2 |
3 files changed, 70 insertions, 0 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c index 7f1b635..cff3f16 100644 --- a/net/nfc/core.c +++ b/net/nfc/core.c @@ -932,6 +932,27 @@ int nfc_remove_se(struct nfc_dev *dev, u32 se_idx) } EXPORT_SYMBOL(nfc_remove_se); +int nfc_se_transaction(struct nfc_dev *dev, u8 se_idx, + struct nfc_evt_transaction *evt_transaction) +{ + int rc; + + pr_debug("transaction: %x\n", se_idx); + + device_lock(&dev->dev); + + if (!evt_transaction) { + rc = -EPROTO; + goto out; + } + + rc = nfc_genl_se_transaction(dev, se_idx, evt_transaction); +out: + device_unlock(&dev->dev); + return rc; +} +EXPORT_SYMBOL(nfc_se_transaction); + static void nfc_release(struct device *d) { struct nfc_dev *dev = to_nfc_dev(d); diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index be387e6..14a2d11 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, diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h index 88d6006..a8ce80b 100644 --- a/net/nfc/nfc.h +++ b/net/nfc/nfc.h @@ -100,6 +100,8 @@ int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list); int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type); int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx); +int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx, + struct nfc_evt_transaction *evt_transaction); struct nfc_dev *nfc_get_device(unsigned int idx); |