summaryrefslogtreecommitdiffstats
path: root/net/nfc
diff options
context:
space:
mode:
authorSamuel Ortiz <sameo@linux.intel.com>2012-04-10 19:43:09 +0200
committerJohn W. Linville <linville@tuxdriver.com>2012-04-12 21:10:37 +0200
commitc4fbb6515a4dcec83d340247639b5644c4745528 (patch)
tree9123c1e0b56ea1f9910ce4db1e9046bd5a8a29c4 /net/nfc
parentNFC: Add HCI documentation (diff)
downloadlinux-c4fbb6515a4dcec83d340247639b5644c4745528.tar.xz
linux-c4fbb6515a4dcec83d340247639b5644c4745528.zip
NFC: The core part should generate the target index
The target index can be used by userspace to uniquely identify a target and thus should be kept unique, per NFC adapter. Moreover, some protocols do not provide a logical index when discovering new targets, so we have to generate one for them. For NCI or pn533 to fetch their logical index, we added a logical_idx field to the target structure. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/core.c5
-rw-r--r--net/nfc/nci/core.c2
-rw-r--r--net/nfc/nci/ntf.c11
-rw-r--r--net/nfc/rawsock.c6
4 files changed, 18 insertions, 6 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c
index deb4721ce8a1..d92400087b61 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -428,10 +428,15 @@ EXPORT_SYMBOL(nfc_alloc_recv_skb);
int nfc_targets_found(struct nfc_dev *dev,
struct nfc_target *targets, int n_targets)
{
+ int i;
+
pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets);
dev->polling = false;
+ for (i = 0; i < n_targets; i++)
+ targets[i].idx = dev->target_idx++;
+
spin_lock_bh(&dev->targets_lock);
dev->targets_generation++;
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 9ec065bb9ee1..8737c2089fdd 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -477,7 +477,7 @@ static int nci_activate_target(struct nfc_dev *nfc_dev, __u32 target_idx,
}
if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
- param.rf_discovery_id = target->idx;
+ param.rf_discovery_id = target->logical_idx;
if (protocol == NFC_PROTO_JEWEL)
param.rf_protocol = NCI_RF_PROTOCOL_T1T;
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index 2e3dee42196d..99e1632e6aac 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -227,7 +227,7 @@ static void nci_add_new_target(struct nci_dev *ndev,
for (i = 0; i < ndev->n_targets; i++) {
target = &ndev->targets[i];
- if (target->idx == ntf->rf_discovery_id) {
+ if (target->logical_idx == ntf->rf_discovery_id) {
/* This target already exists, add the new protocol */
nci_add_new_protocol(ndev, target, ntf->rf_protocol,
ntf->rf_tech_and_mode,
@@ -248,10 +248,10 @@ static void nci_add_new_target(struct nci_dev *ndev,
ntf->rf_tech_and_mode,
&ntf->rf_tech_specific_params);
if (!rc) {
- target->idx = ntf->rf_discovery_id;
+ target->logical_idx = ntf->rf_discovery_id;
ndev->n_targets++;
- pr_debug("target_idx %d, n_targets %d\n", target->idx,
+ pr_debug("logical idx %d, n_targets %d\n", target->logical_idx,
ndev->n_targets);
}
}
@@ -372,10 +372,11 @@ static void nci_target_auto_activated(struct nci_dev *ndev,
if (rc)
return;
- target->idx = ntf->rf_discovery_id;
+ target->logical_idx = ntf->rf_discovery_id;
ndev->n_targets++;
- pr_debug("target_idx %d, n_targets %d\n", target->idx, ndev->n_targets);
+ pr_debug("logical idx %d, n_targets %d\n",
+ target->logical_idx, ndev->n_targets);
nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets);
}
diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index 5a839ceb2e82..b2825aa85f64 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -92,6 +92,12 @@ static int rawsock_connect(struct socket *sock, struct sockaddr *_addr,
goto error;
}
+ if (addr->target_idx > dev->target_idx - 1 ||
+ addr->target_idx < dev->target_idx - dev->n_targets) {
+ rc = -EINVAL;
+ goto error;
+ }
+
rc = nfc_activate_target(dev, addr->target_idx, addr->nfc_protocol);
if (rc)
goto put_dev;