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-rw-r--r--net/nfc/Kconfig4
-rw-r--r--net/nfc/core.c33
-rw-r--r--net/nfc/hci/command.c28
-rw-r--r--net/nfc/hci/core.c90
-rw-r--r--net/nfc/hci/llc.c2
-rw-r--r--net/nfc/hci/llc_shdlc.c7
-rw-r--r--net/nfc/llcp/Kconfig4
-rw-r--r--net/nfc/llcp/commands.c148
-rw-r--r--net/nfc/llcp/llcp.c248
-rw-r--r--net/nfc/llcp/llcp.h13
-rw-r--r--net/nfc/llcp/sock.c38
-rw-r--r--net/nfc/nci/Kconfig4
-rw-r--r--net/nfc/nci/core.c29
-rw-r--r--net/nfc/netlink.c157
-rw-r--r--net/nfc/nfc.h6
-rw-r--r--net/nfc/rawsock.c1
16 files changed, 688 insertions, 124 deletions
diff --git a/net/nfc/Kconfig b/net/nfc/Kconfig
index 8d8d9bc4b6ff..60c3bbb63e8e 100644
--- a/net/nfc/Kconfig
+++ b/net/nfc/Kconfig
@@ -3,8 +3,8 @@
#
menuconfig NFC
- depends on NET && EXPERIMENTAL
- tristate "NFC subsystem support (EXPERIMENTAL)"
+ depends on NET
+ tristate "NFC subsystem support"
default n
help
Say Y here if you want to build support for NFC (Near field
diff --git a/net/nfc/core.c b/net/nfc/core.c
index 479bee36dc3e..aa64ea441676 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -40,6 +40,9 @@
int nfc_devlist_generation;
DEFINE_MUTEX(nfc_devlist_mutex);
+/* NFC device ID bitmap */
+static DEFINE_IDA(nfc_index_ida);
+
/**
* nfc_dev_up - turn on the NFC device
*
@@ -181,6 +184,7 @@ int nfc_stop_poll(struct nfc_dev *dev)
dev->ops->stop_poll(dev);
dev->polling = false;
+ dev->rf_mode = NFC_RF_NONE;
error:
device_unlock(&dev->dev);
@@ -194,7 +198,7 @@ static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx)
if (dev->n_targets == 0)
return NULL;
- for (i = 0; i < dev->n_targets ; i++) {
+ for (i = 0; i < dev->n_targets; i++) {
if (dev->targets[i].idx == target_idx)
return &dev->targets[i];
}
@@ -274,12 +278,14 @@ int nfc_dep_link_down(struct nfc_dev *dev)
if (!rc) {
dev->dep_link_up = false;
dev->active_target = NULL;
+ dev->rf_mode = NFC_RF_NONE;
nfc_llcp_mac_is_down(dev);
nfc_genl_dep_link_down_event(dev);
}
error:
device_unlock(&dev->dev);
+
return rc;
}
@@ -503,6 +509,7 @@ EXPORT_SYMBOL(nfc_tm_activated);
int nfc_tm_deactivated(struct nfc_dev *dev)
{
dev->dep_link_up = false;
+ dev->rf_mode = NFC_RF_NONE;
return nfc_genl_tm_deactivated(dev);
}
@@ -697,6 +704,8 @@ static void nfc_check_pres_work(struct work_struct *work)
if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) {
rc = dev->ops->check_presence(dev, dev->active_target);
+ if (rc == -EOPNOTSUPP)
+ goto exit;
if (!rc) {
mod_timer(&dev->check_pres_timer, jiffies +
msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
@@ -708,6 +717,7 @@ static void nfc_check_pres_work(struct work_struct *work)
}
}
+exit:
device_unlock(&dev->dev);
}
@@ -753,7 +763,6 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
u32 supported_protocols,
int tx_headroom, int tx_tailroom)
{
- static atomic_t dev_no = ATOMIC_INIT(0);
struct nfc_dev *dev;
if (!ops->start_poll || !ops->stop_poll || !ops->activate_target ||
@@ -767,11 +776,6 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
if (!dev)
return NULL;
- dev->dev.class = &nfc_class;
- dev->idx = atomic_inc_return(&dev_no) - 1;
- dev_set_name(&dev->dev, "nfc%d", dev->idx);
- device_initialize(&dev->dev);
-
dev->ops = ops;
dev->supported_protocols = supported_protocols;
dev->tx_headroom = tx_headroom;
@@ -779,6 +783,7 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
nfc_genl_data_init(&dev->genl_data);
+ dev->rf_mode = NFC_RF_NONE;
/* first generation must not be 0 */
dev->targets_generation = 1;
@@ -806,6 +811,14 @@ int nfc_register_device(struct nfc_dev *dev)
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
+ dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL);
+ if (dev->idx < 0)
+ return dev->idx;
+
+ dev->dev.class = &nfc_class;
+ dev_set_name(&dev->dev, "nfc%d", dev->idx);
+ device_initialize(&dev->dev);
+
mutex_lock(&nfc_devlist_mutex);
nfc_devlist_generation++;
rc = device_add(&dev->dev);
@@ -834,10 +847,12 @@ EXPORT_SYMBOL(nfc_register_device);
*/
void nfc_unregister_device(struct nfc_dev *dev)
{
- int rc;
+ int rc, id;
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
+ id = dev->idx;
+
mutex_lock(&nfc_devlist_mutex);
nfc_devlist_generation++;
@@ -856,6 +871,8 @@ void nfc_unregister_device(struct nfc_dev *dev)
pr_debug("The userspace won't be notified that the device %s was removed\n",
dev_name(&dev->dev));
+ ida_simple_remove(&nfc_index_ida, id);
+
}
EXPORT_SYMBOL(nfc_unregister_device);
diff --git a/net/nfc/hci/command.c b/net/nfc/hci/command.c
index 71c6a7086b8f..7d99410e6c1a 100644
--- a/net/nfc/hci/command.c
+++ b/net/nfc/hci/command.c
@@ -257,16 +257,16 @@ static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
*result = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
NFC_HCI_ADM_CREATE_PIPE,
(u8 *) &params, sizeof(params), &skb);
- if (*result == 0) {
- resp = (struct hci_create_pipe_resp *)skb->data;
- pipe = resp->pipe;
- kfree_skb(skb);
+ if (*result < 0)
+ return NFC_HCI_INVALID_PIPE;
- pr_debug("pipe created=%d\n", pipe);
+ resp = (struct hci_create_pipe_resp *)skb->data;
+ pipe = resp->pipe;
+ kfree_skb(skb);
- return pipe;
- } else
- return NFC_HCI_INVALID_PIPE;
+ pr_debug("pipe created=%d\n", pipe);
+
+ return pipe;
}
static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
@@ -279,8 +279,6 @@ static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
{
- int r;
-
u8 param[2];
/* TODO: Find out what the identity reference data is
@@ -288,10 +286,8 @@ static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
pr_debug("\n");
- r = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
- NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
-
- return 0;
+ return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
+ NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
}
int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
@@ -348,7 +344,7 @@ int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
return -EADDRINUSE;
if (pipe != NFC_HCI_INVALID_PIPE)
- goto pipe_is_open;
+ goto open_pipe;
switch (dest_gate) {
case NFC_HCI_LINK_MGMT_GATE:
@@ -365,6 +361,7 @@ int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
break;
}
+open_pipe:
r = nfc_hci_open_pipe(hdev, pipe);
if (r < 0) {
if (pipe_created)
@@ -375,7 +372,6 @@ int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
return r;
}
-pipe_is_open:
hdev->gate2pipe[dest_gate] = pipe;
return 0;
diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index 5fbb6e40793e..7bea574d5934 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -33,17 +33,20 @@
/* Largest headroom needed for outgoing HCI commands */
#define HCI_CMDS_HEADROOM 1
-static int nfc_hci_result_to_errno(u8 result)
+int nfc_hci_result_to_errno(u8 result)
{
switch (result) {
case NFC_HCI_ANY_OK:
return 0;
+ case NFC_HCI_ANY_E_REG_PAR_UNKNOWN:
+ return -EOPNOTSUPP;
case NFC_HCI_ANY_E_TIMEOUT:
return -ETIME;
default:
return -1;
}
}
+EXPORT_SYMBOL(nfc_hci_result_to_errno);
static void nfc_hci_msg_tx_work(struct work_struct *work)
{
@@ -65,8 +68,9 @@ static void nfc_hci_msg_tx_work(struct work_struct *work)
-ETIME);
kfree(hdev->cmd_pending_msg);
hdev->cmd_pending_msg = NULL;
- } else
+ } else {
goto exit;
+ }
}
next_msg:
@@ -166,7 +170,7 @@ void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
kfree_skb(skb);
}
-static u32 nfc_hci_sak_to_protocol(u8 sak)
+u32 nfc_hci_sak_to_protocol(u8 sak)
{
switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) {
case NFC_HCI_TYPE_A_SEL_PROT_MIFARE:
@@ -181,8 +185,9 @@ static u32 nfc_hci_sak_to_protocol(u8 sak)
return 0xffffffff;
}
}
+EXPORT_SYMBOL(nfc_hci_sak_to_protocol);
-static int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
+int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
{
struct nfc_target *targets;
struct sk_buff *atqa_skb = NULL;
@@ -263,7 +268,9 @@ static int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
break;
}
- targets->hci_reader_gate = gate;
+ /* if driver set the new gate, we will skip the old one */
+ if (targets->hci_reader_gate == 0x00)
+ targets->hci_reader_gate = gate;
r = nfc_targets_found(hdev->ndev, targets, 1);
@@ -275,11 +282,18 @@ exit:
return r;
}
+EXPORT_SYMBOL(nfc_hci_target_discovered);
void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
struct sk_buff *skb)
{
int r = 0;
+ u8 gate = nfc_hci_pipe2gate(hdev, pipe);
+
+ if (gate == 0xff) {
+ pr_err("Discarded event %x to unopened pipe %x\n", event, pipe);
+ goto exit;
+ }
switch (event) {
case NFC_HCI_EVT_TARGET_DISCOVERED:
@@ -303,12 +317,14 @@ void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
goto exit;
}
- r = nfc_hci_target_discovered(hdev,
- nfc_hci_pipe2gate(hdev, pipe));
+ r = nfc_hci_target_discovered(hdev, gate);
break;
default:
- /* TODO: Unknown events are hardware specific
- * pass them to the driver (needs a new hci_ops) */
+ if (hdev->ops->event_received) {
+ hdev->ops->event_received(hdev, gate, event, skb);
+ return;
+ }
+
break;
}
@@ -410,6 +426,10 @@ static int hci_dev_version(struct nfc_hci_dev *hdev)
r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
NFC_HCI_ID_MGMT_VERSION_SW, &skb);
+ if (r == -EOPNOTSUPP) {
+ pr_info("Software/Hardware info not available\n");
+ return 0;
+ }
if (r < 0)
return r;
@@ -527,7 +547,8 @@ static int hci_start_poll(struct nfc_dev *nfc_dev,
return hdev->ops->start_poll(hdev, im_protocols, tm_protocols);
else
return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
- NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
+ NFC_HCI_EVT_READER_REQUESTED,
+ NULL, 0);
}
static void hci_stop_poll(struct nfc_dev *nfc_dev)
@@ -538,6 +559,28 @@ static void hci_stop_poll(struct nfc_dev *nfc_dev)
NFC_HCI_EVT_END_OPERATION, NULL, 0);
}
+static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
+ __u8 comm_mode, __u8 *gb, size_t gb_len)
+{
+ struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+
+ if (hdev->ops->dep_link_up)
+ return hdev->ops->dep_link_up(hdev, target, comm_mode,
+ gb, gb_len);
+
+ return 0;
+}
+
+static int hci_dep_link_down(struct nfc_dev *nfc_dev)
+{
+ struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+
+ if (hdev->ops->dep_link_down)
+ return hdev->ops->dep_link_down(hdev);
+
+ return 0;
+}
+
static int hci_activate_target(struct nfc_dev *nfc_dev,
struct nfc_target *target, u32 protocol)
{
@@ -586,8 +629,8 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
switch (target->hci_reader_gate) {
case NFC_HCI_RF_READER_A_GATE:
case NFC_HCI_RF_READER_B_GATE:
- if (hdev->ops->data_exchange) {
- r = hdev->ops->data_exchange(hdev, target, skb, cb,
+ if (hdev->ops->im_transceive) {
+ r = hdev->ops->im_transceive(hdev, target, skb, cb,
cb_context);
if (r <= 0) /* handled */
break;
@@ -604,14 +647,14 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
skb->len, hci_transceive_cb, hdev);
break;
default:
- if (hdev->ops->data_exchange) {
- r = hdev->ops->data_exchange(hdev, target, skb, cb,
+ if (hdev->ops->im_transceive) {
+ r = hdev->ops->im_transceive(hdev, target, skb, cb,
cb_context);
if (r == 1)
r = -ENOTSUPP;
- }
- else
+ } else {
r = -ENOTSUPP;
+ }
break;
}
@@ -620,6 +663,16 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
return r;
}
+static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
+{
+ struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+
+ if (hdev->ops->tm_send)
+ return hdev->ops->tm_send(hdev, skb);
+ else
+ return -ENOTSUPP;
+}
+
static int hci_check_presence(struct nfc_dev *nfc_dev,
struct nfc_target *target)
{
@@ -723,9 +776,12 @@ static struct nfc_ops hci_nfc_ops = {
.dev_down = hci_dev_down,
.start_poll = hci_start_poll,
.stop_poll = hci_stop_poll,
+ .dep_link_up = hci_dep_link_up,
+ .dep_link_down = hci_dep_link_down,
.activate_target = hci_activate_target,
.deactivate_target = hci_deactivate_target,
.im_transceive = hci_transceive,
+ .tm_send = hci_tm_send,
.check_presence = hci_check_presence,
};
@@ -848,7 +904,7 @@ void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
}
EXPORT_SYMBOL(nfc_hci_driver_failure);
-void inline nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
nfc_llc_rcv_from_drv(hdev->llc, skb);
}
diff --git a/net/nfc/hci/llc.c b/net/nfc/hci/llc.c
index ae1205ded87f..fe5e966e5b88 100644
--- a/net/nfc/hci/llc.c
+++ b/net/nfc/hci/llc.c
@@ -72,7 +72,7 @@ int nfc_llc_register(const char *name, struct nfc_llc_ops *ops)
llc_engine->ops = ops;
INIT_LIST_HEAD(&llc_engine->entry);
- list_add_tail (&llc_engine->entry, &llc_engines);
+ list_add_tail(&llc_engine->entry, &llc_engines);
return 0;
}
diff --git a/net/nfc/hci/llc_shdlc.c b/net/nfc/hci/llc_shdlc.c
index 01cbc72943cd..27b313befc35 100644
--- a/net/nfc/hci/llc_shdlc.c
+++ b/net/nfc/hci/llc_shdlc.c
@@ -634,9 +634,9 @@ static void llc_shdlc_sm_work(struct work_struct *work)
r = llc_shdlc_connect_initiate(shdlc);
else
r = -ETIME;
- if (r < 0)
+ if (r < 0) {
llc_shdlc_connect_complete(shdlc, r);
- else {
+ } else {
mod_timer(&shdlc->connect_timer, jiffies +
msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS));
@@ -682,9 +682,8 @@ static void llc_shdlc_sm_work(struct work_struct *work)
llc_shdlc_handle_send_queue(shdlc);
}
- if (shdlc->hard_fault) {
+ if (shdlc->hard_fault)
shdlc->llc_failure(shdlc->hdev, shdlc->hard_fault);
- }
break;
default:
break;
diff --git a/net/nfc/llcp/Kconfig b/net/nfc/llcp/Kconfig
index fbf5e8150908..a1a41cd68255 100644
--- a/net/nfc/llcp/Kconfig
+++ b/net/nfc/llcp/Kconfig
@@ -1,6 +1,6 @@
config NFC_LLCP
- depends on NFC && EXPERIMENTAL
- bool "NFC LLCP support (EXPERIMENTAL)"
+ depends on NFC
+ bool "NFC LLCP support"
default n
help
Say Y here if you want to build support for a kernel NFC LLCP
diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index c45ccd6c094c..df24be48d4da 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -261,7 +261,6 @@ int nfc_llcp_disconnect(struct nfc_llcp_sock *sock)
struct sk_buff *skb;
struct nfc_dev *dev;
struct nfc_llcp_local *local;
- u16 size = 0;
pr_debug("Sending DISC\n");
@@ -273,17 +272,10 @@ int nfc_llcp_disconnect(struct nfc_llcp_sock *sock)
if (dev == NULL)
return -ENODEV;
- size += LLCP_HEADER_SIZE;
- size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
-
- skb = alloc_skb(size, GFP_ATOMIC);
+ skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0);
if (skb == NULL)
return -ENOMEM;
- skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
-
- skb = llcp_add_header(skb, sock->dsap, sock->ssap, LLCP_PDU_DISC);
-
skb_queue_tail(&local->tx_queue, skb);
return 0;
@@ -324,8 +316,7 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock)
struct sk_buff *skb;
u8 *service_name_tlv = NULL, service_name_tlv_length;
u8 *miux_tlv = NULL, miux_tlv_length;
- u8 *rw_tlv = NULL, rw_tlv_length, rw;
- __be16 miux;
+ u8 *rw_tlv = NULL, rw_tlv_length;
int err;
u16 size = 0;
@@ -343,13 +334,11 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock)
size += service_name_tlv_length;
}
- miux = cpu_to_be16(LLCP_MAX_MIUX);
- miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
+ miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
&miux_tlv_length);
size += miux_tlv_length;
- rw = LLCP_MAX_RW;
- rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
+ rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &local->rw, 0, &rw_tlv_length);
size += rw_tlv_length;
pr_debug("SKB size %d SN length %zu\n", size, sock->service_name_len);
@@ -386,8 +375,7 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
struct nfc_llcp_local *local;
struct sk_buff *skb;
u8 *miux_tlv = NULL, miux_tlv_length;
- u8 *rw_tlv = NULL, rw_tlv_length, rw;
- __be16 miux;
+ u8 *rw_tlv = NULL, rw_tlv_length;
int err;
u16 size = 0;
@@ -397,13 +385,11 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
if (local == NULL)
return -ENODEV;
- miux = cpu_to_be16(LLCP_MAX_MIUX);
- miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
+ miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
&miux_tlv_length);
size += miux_tlv_length;
- rw = LLCP_MAX_RW;
- rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
+ rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &local->rw, 0, &rw_tlv_length);
size += rw_tlv_length;
skb = llcp_allocate_pdu(sock, LLCP_PDU_CC, size);
@@ -428,6 +414,52 @@ error_tlv:
return err;
}
+int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap)
+{
+ struct sk_buff *skb;
+ struct nfc_dev *dev;
+ u8 *sdres_tlv = NULL, sdres_tlv_length, sdres[2];
+ u16 size = 0;
+
+ pr_debug("Sending SNL tid 0x%x sap 0x%x\n", tid, sap);
+
+ if (local == NULL)
+ return -ENODEV;
+
+ dev = local->dev;
+ if (dev == NULL)
+ return -ENODEV;
+
+ sdres[0] = tid;
+ sdres[1] = sap;
+ sdres_tlv = nfc_llcp_build_tlv(LLCP_TLV_SDRES, sdres, 0,
+ &sdres_tlv_length);
+ if (sdres_tlv == NULL)
+ return -ENOMEM;
+
+ size += LLCP_HEADER_SIZE;
+ size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
+ size += sdres_tlv_length;
+
+ skb = alloc_skb(size, GFP_KERNEL);
+ if (skb == NULL) {
+ kfree(sdres_tlv);
+ return -ENOMEM;
+ }
+
+ skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
+
+ skb = llcp_add_header(skb, LLCP_SAP_SDP, LLCP_SAP_SDP, LLCP_PDU_SNL);
+
+ memcpy(skb_put(skb, sdres_tlv_length), sdres_tlv, sdres_tlv_length);
+
+ skb_queue_tail(&local->tx_queue, skb);
+
+ kfree(sdres_tlv);
+
+ return 0;
+}
+
int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason)
{
struct sk_buff *skb;
@@ -496,6 +528,23 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
if (local == NULL)
return -ENODEV;
+ /* Remote is ready but has not acknowledged our frames */
+ if((sock->remote_ready &&
+ skb_queue_len(&sock->tx_pending_queue) >= sock->rw &&
+ skb_queue_len(&sock->tx_queue) >= 2 * sock->rw)) {
+ pr_err("Pending queue is full %d frames\n",
+ skb_queue_len(&sock->tx_pending_queue));
+ return -ENOBUFS;
+ }
+
+ /* Remote is not ready and we've been queueing enough frames */
+ if ((!sock->remote_ready &&
+ skb_queue_len(&sock->tx_queue) >= 2 * sock->rw)) {
+ pr_err("Tx queue is full %d frames\n",
+ skb_queue_len(&sock->tx_queue));
+ return -ENOBUFS;
+ }
+
msg_data = kzalloc(len, GFP_KERNEL);
if (msg_data == NULL)
return -ENOMEM;
@@ -541,6 +590,63 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
return len;
}
+int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
+ struct msghdr *msg, size_t len)
+{
+ struct sk_buff *pdu;
+ struct nfc_llcp_local *local;
+ size_t frag_len = 0, remaining_len;
+ u8 *msg_ptr, *msg_data;
+ int err;
+
+ pr_debug("Send UI frame len %zd\n", len);
+
+ local = sock->local;
+ if (local == NULL)
+ return -ENODEV;
+
+ msg_data = kzalloc(len, GFP_KERNEL);
+ if (msg_data == NULL)
+ return -ENOMEM;
+
+ if (memcpy_fromiovec(msg_data, msg->msg_iov, len)) {
+ kfree(msg_data);
+ return -EFAULT;
+ }
+
+ remaining_len = len;
+ msg_ptr = msg_data;
+
+ while (remaining_len > 0) {
+
+ frag_len = min_t(size_t, sock->miu, remaining_len);
+
+ pr_debug("Fragment %zd bytes remaining %zd",
+ frag_len, remaining_len);
+
+ pdu = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
+ frag_len + LLCP_HEADER_SIZE, &err);
+ if (pdu == NULL) {
+ pr_err("Could not allocate PDU\n");
+ continue;
+ }
+
+ pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
+
+ memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
+
+ /* No need to check for the peer RW for UI frames */
+ skb_queue_tail(&local->tx_queue, pdu);
+
+ remaining_len -= frag_len;
+ msg_ptr += frag_len;
+ }
+
+ kfree(msg_data);
+
+ return len;
+}
+
int nfc_llcp_send_rr(struct nfc_llcp_sock *sock)
{
struct sk_buff *skb;
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 9e8f4b2801f6..ec43914c92a9 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -45,12 +45,38 @@ void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk)
write_unlock(&l->lock);
}
+static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock)
+{
+ struct nfc_llcp_local *local = sock->local;
+ struct sk_buff *s, *tmp;
+
+ pr_debug("%p\n", &sock->sk);
+
+ skb_queue_purge(&sock->tx_queue);
+ skb_queue_purge(&sock->tx_pending_queue);
+ skb_queue_purge(&sock->tx_backlog_queue);
+
+ if (local == NULL)
+ return;
+
+ /* Search for local pending SKBs that are related to this socket */
+ skb_queue_walk_safe(&local->tx_queue, s, tmp) {
+ if (s->sk != &sock->sk)
+ continue;
+
+ skb_unlink(s, &local->tx_queue);
+ kfree_skb(s);
+ }
+}
+
static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
{
struct sock *sk;
struct hlist_node *node, *tmp;
struct nfc_llcp_sock *llcp_sock;
+ skb_queue_purge(&local->tx_queue);
+
write_lock(&local->sockets.lock);
sk_for_each_safe(sk, node, tmp, &local->sockets.head) {
@@ -58,6 +84,8 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
bh_lock_sock(sk);
+ nfc_llcp_socket_purge(llcp_sock);
+
if (sk->sk_state == LLCP_CONNECTED)
nfc_put_device(llcp_sock->dev);
@@ -65,7 +93,8 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
struct nfc_llcp_sock *lsk, *n;
struct sock *accept_sk;
- list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
+ list_for_each_entry_safe(lsk, n,
+ &llcp_sock->accept_queue,
accept_queue) {
accept_sk = &lsk->sk;
bh_lock_sock(accept_sk);
@@ -85,6 +114,16 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
}
}
+ /*
+ * If we have a connection less socket bound, we keep it alive
+ * if the device is still present.
+ */
+ if (sk->sk_state == LLCP_BOUND && sk->sk_type == SOCK_DGRAM &&
+ listen == true) {
+ bh_unlock_sock(sk);
+ continue;
+ }
+
sk->sk_state = LLCP_CLOSED;
bh_unlock_sock(sk);
@@ -134,7 +173,7 @@ static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local,
{
struct sock *sk;
struct hlist_node *node;
- struct nfc_llcp_sock *llcp_sock;
+ struct nfc_llcp_sock *llcp_sock, *tmp_sock;
pr_debug("ssap dsap %d %d\n", ssap, dsap);
@@ -146,10 +185,12 @@ static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local,
llcp_sock = NULL;
sk_for_each(sk, node, &local->sockets.head) {
- llcp_sock = nfc_llcp_sock(sk);
+ tmp_sock = nfc_llcp_sock(sk);
- if (llcp_sock->ssap == ssap && llcp_sock->dsap == dsap)
+ if (tmp_sock->ssap == ssap && tmp_sock->dsap == dsap) {
+ llcp_sock = tmp_sock;
break;
+ }
}
read_unlock(&local->sockets.lock);
@@ -249,7 +290,12 @@ struct nfc_llcp_sock *nfc_llcp_sock_from_sn(struct nfc_llcp_local *local,
pr_debug("llcp sock %p\n", tmp_sock);
- if (tmp_sock->sk.sk_state != LLCP_LISTEN)
+ if (tmp_sock->sk.sk_type == SOCK_STREAM &&
+ tmp_sock->sk.sk_state != LLCP_LISTEN)
+ continue;
+
+ if (tmp_sock->sk.sk_type == SOCK_DGRAM &&
+ tmp_sock->sk.sk_state != LLCP_BOUND)
continue;
if (tmp_sock->service_name == NULL ||
@@ -421,10 +467,9 @@ static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local)
static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
{
u8 *gb_cur, *version_tlv, version, version_length;
- u8 *lto_tlv, lto, lto_length;
+ u8 *lto_tlv, lto_length;
u8 *wks_tlv, wks_length;
u8 *miux_tlv, miux_length;
- __be16 miux;
u8 gb_len = 0;
int ret = 0;
@@ -433,9 +478,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
1, &version_length);
gb_len += version_length;
- /* 1500 ms */
- lto = 150;
- lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &lto, 1, &lto_length);
+ lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, &lto_length);
gb_len += lto_length;
pr_debug("Local wks 0x%lx\n", local->local_wks);
@@ -443,8 +486,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
&wks_length);
gb_len += wks_length;
- miux = cpu_to_be16(LLCP_MAX_MIUX);
- miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
+ miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
&miux_length);
gb_len += miux_length;
@@ -610,7 +652,12 @@ static void nfc_llcp_tx_work(struct work_struct *work)
if (skb != NULL) {
sk = skb->sk;
llcp_sock = nfc_llcp_sock(sk);
- if (llcp_sock != NULL) {
+
+ if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) {
+ nfc_llcp_send_symm(local->dev);
+ } else {
+ struct sk_buff *copy_skb = NULL;
+ u8 ptype = nfc_llcp_ptype(skb);
int ret;
pr_debug("Sending pending skb\n");
@@ -618,24 +665,29 @@ static void nfc_llcp_tx_work(struct work_struct *work)
DUMP_PREFIX_OFFSET, 16, 1,
skb->data, skb->len, true);
+ if (ptype == LLCP_PDU_I)
+ copy_skb = skb_copy(skb, GFP_ATOMIC);
+
nfc_llcp_send_to_raw_sock(local, skb,
NFC_LLCP_DIRECTION_TX);
ret = nfc_data_exchange(local->dev, local->target_idx,
skb, nfc_llcp_recv, local);
- if (!ret && nfc_llcp_ptype(skb) == LLCP_PDU_I) {
- skb = skb_get(skb);
- skb_queue_tail(&llcp_sock->tx_pending_queue,
- skb);
+ if (ret) {
+ kfree_skb(copy_skb);
+ goto out;
}
- } else {
- nfc_llcp_send_symm(local->dev);
+
+ if (ptype == LLCP_PDU_I && copy_skb)
+ skb_queue_tail(&llcp_sock->tx_pending_queue,
+ copy_skb);
}
} else {
nfc_llcp_send_symm(local->dev);
}
+out:
mod_timer(&local->link_timer,
jiffies + msecs_to_jiffies(2 * local->remote_lto));
}
@@ -704,6 +756,39 @@ static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len)
return NULL;
}
+static void nfc_llcp_recv_ui(struct nfc_llcp_local *local,
+ struct sk_buff *skb)
+{
+ struct nfc_llcp_sock *llcp_sock;
+ struct nfc_llcp_ui_cb *ui_cb;
+ u8 dsap, ssap;
+
+ dsap = nfc_llcp_dsap(skb);
+ ssap = nfc_llcp_ssap(skb);
+
+ ui_cb = nfc_llcp_ui_skb_cb(skb);
+ ui_cb->dsap = dsap;
+ ui_cb->ssap = ssap;
+
+ printk("%s %d %d\n", __func__, dsap, ssap);
+
+ pr_debug("%d %d\n", dsap, ssap);
+
+ /* We're looking for a bound socket, not a client one */
+ llcp_sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP);
+ if (llcp_sock == NULL || llcp_sock->sk.sk_type != SOCK_DGRAM)
+ return;
+
+ /* There is no sequence with UI frames */
+ skb_pull(skb, LLCP_HEADER_SIZE);
+ if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
+ pr_err("receive queue is full\n");
+ skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+ }
+
+ nfc_llcp_sock_put(llcp_sock);
+}
+
static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
struct sk_buff *skb)
{
@@ -823,9 +908,6 @@ static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
fail:
/* Send DM */
nfc_llcp_send_dm(local, dsap, ssap, reason);
-
- return;
-
}
int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock)
@@ -903,15 +985,18 @@ static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local,
/* Remove skbs from the pending queue */
if (llcp_sock->send_ack_n != nr) {
struct sk_buff *s, *tmp;
+ u8 n;
llcp_sock->send_ack_n = nr;
/* Remove and free all skbs until ns == nr */
skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) {
+ n = nfc_llcp_ns(s);
+
skb_unlink(s, &llcp_sock->tx_pending_queue);
kfree_skb(s);
- if (nfc_llcp_ns(s) == nr)
+ if (n == nr)
break;
}
@@ -953,6 +1038,9 @@ static void nfc_llcp_recv_disc(struct nfc_llcp_local *local,
sk = &llcp_sock->sk;
lock_sock(sk);
+
+ nfc_llcp_socket_purge(llcp_sock);
+
if (sk->sk_state == LLCP_CLOSED) {
release_sock(sk);
nfc_llcp_sock_put(llcp_sock);
@@ -1027,7 +1115,7 @@ static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb)
}
if (llcp_sock == NULL) {
- pr_err("Invalid DM\n");
+ pr_debug("Already closed\n");
return;
}
@@ -1038,8 +1126,100 @@ static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb)
sk->sk_state_change(sk);
nfc_llcp_sock_put(llcp_sock);
+}
- return;
+static void nfc_llcp_recv_snl(struct nfc_llcp_local *local,
+ struct sk_buff *skb)
+{
+ struct nfc_llcp_sock *llcp_sock;
+ u8 dsap, ssap, *tlv, type, length, tid, sap;
+ u16 tlv_len, offset;
+ char *service_name;
+ size_t service_name_len;
+
+ dsap = nfc_llcp_dsap(skb);
+ ssap = nfc_llcp_ssap(skb);
+
+ pr_debug("%d %d\n", dsap, ssap);
+
+ if (dsap != LLCP_SAP_SDP || ssap != LLCP_SAP_SDP) {
+ pr_err("Wrong SNL SAP\n");
+ return;
+ }
+
+ tlv = &skb->data[LLCP_HEADER_SIZE];
+ tlv_len = skb->len - LLCP_HEADER_SIZE;
+ offset = 0;
+
+ while (offset < tlv_len) {
+ type = tlv[0];
+ length = tlv[1];
+
+ switch (type) {
+ case LLCP_TLV_SDREQ:
+ tid = tlv[2];
+ service_name = (char *) &tlv[3];
+ service_name_len = length - 1;
+
+ pr_debug("Looking for %.16s\n", service_name);
+
+ if (service_name_len == strlen("urn:nfc:sn:sdp") &&
+ !strncmp(service_name, "urn:nfc:sn:sdp",
+ service_name_len)) {
+ sap = 1;
+ goto send_snl;
+ }
+
+ llcp_sock = nfc_llcp_sock_from_sn(local, service_name,
+ service_name_len);
+ if (!llcp_sock) {
+ sap = 0;
+ goto send_snl;
+ }
+
+ /*
+ * We found a socket but its ssap has not been reserved
+ * yet. We need to assign it for good and send a reply.
+ * The ssap will be freed when the socket is closed.
+ */
+ if (llcp_sock->ssap == LLCP_SDP_UNBOUND) {
+ atomic_t *client_count;
+
+ sap = nfc_llcp_reserve_sdp_ssap(local);
+
+ pr_debug("Reserving %d\n", sap);
+
+ if (sap == LLCP_SAP_MAX) {
+ sap = 0;
+ goto send_snl;
+ }
+
+ client_count =
+ &local->local_sdp_cnt[sap -
+ LLCP_WKS_NUM_SAP];
+
+ atomic_inc(client_count);
+
+ llcp_sock->ssap = sap;
+ llcp_sock->reserved_ssap = sap;
+ } else {
+ sap = llcp_sock->ssap;
+ }
+
+ pr_debug("%p %d\n", llcp_sock, sap);
+
+send_snl:
+ nfc_llcp_send_snl(local, tid, sap);
+ break;
+
+ default:
+ pr_err("Invalid SNL tlv value 0x%x\n", type);
+ break;
+ }
+
+ offset += length + 2;
+ tlv += length + 2;
+ }
}
static void nfc_llcp_rx_work(struct work_struct *work)
@@ -1072,6 +1252,11 @@ static void nfc_llcp_rx_work(struct work_struct *work)
pr_debug("SYMM\n");
break;
+ case LLCP_PDU_UI:
+ pr_debug("UI\n");
+ nfc_llcp_recv_ui(local, skb);
+ break;
+
case LLCP_PDU_CONNECT:
pr_debug("CONNECT\n");
nfc_llcp_recv_connect(local, skb);
@@ -1092,6 +1277,11 @@ static void nfc_llcp_rx_work(struct work_struct *work)
nfc_llcp_recv_dm(local, skb);
break;
+ case LLCP_PDU_SNL:
+ pr_debug("SNL\n");
+ nfc_llcp_recv_snl(local, skb);
+ break;
+
case LLCP_PDU_I:
case LLCP_PDU_RR:
case LLCP_PDU_RNR:
@@ -1104,8 +1294,6 @@ static void nfc_llcp_rx_work(struct work_struct *work)
schedule_work(&local->tx_work);
kfree_skb(local->rx_pending);
local->rx_pending = NULL;
-
- return;
}
void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
@@ -1121,8 +1309,6 @@ void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
local->rx_pending = skb_get(skb);
del_timer(&local->link_timer);
schedule_work(&local->rx_work);
-
- return;
}
int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
@@ -1205,6 +1391,10 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
rwlock_init(&local->connecting_sockets.lock);
rwlock_init(&local->raw_sockets.lock);
+ local->lto = 150; /* 1500 ms */
+ local->rw = LLCP_MAX_RW;
+ local->miux = cpu_to_be16(LLCP_MAX_MIUX);
+
nfc_llcp_build_gb(local);
local->remote_miu = LLCP_DEFAULT_MIU;
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index fdb2d24e60bd..0d62366f8cc3 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -64,6 +64,9 @@ struct nfc_llcp_local {
u32 target_idx;
u8 rf_mode;
u8 comm_mode;
+ u8 lto;
+ u8 rw;
+ __be16 miux;
unsigned long local_wks; /* Well known services */
unsigned long local_sdp; /* Local services */
unsigned long local_sap; /* Local SAPs, not available for discovery */
@@ -124,6 +127,13 @@ struct nfc_llcp_sock {
struct sock *parent;
};
+struct nfc_llcp_ui_cb {
+ __u8 dsap;
+ __u8 ssap;
+};
+
+#define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))
+
#define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
#define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev)
@@ -209,10 +219,13 @@ int nfc_llcp_disconnect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_symm(struct nfc_dev *dev);
int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
+int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap);
int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
struct msghdr *msg, size_t len);
+int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
+ struct msghdr *msg, size_t len);
int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
/* Socket API */
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index 63e4cdc92376..fea22eb41b82 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -205,8 +205,8 @@ static int llcp_sock_listen(struct socket *sock, int backlog)
lock_sock(sk);
- if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM)
- || sk->sk_state != LLCP_BOUND) {
+ if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) ||
+ sk->sk_state != LLCP_BOUND) {
ret = -EBADFD;
goto error;
}
@@ -608,6 +608,21 @@ static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
lock_sock(sk);
+ if (sk->sk_type == SOCK_DGRAM) {
+ struct sockaddr_nfc_llcp *addr =
+ (struct sockaddr_nfc_llcp *)msg->msg_name;
+
+ if (msg->msg_namelen < sizeof(*addr)) {
+ release_sock(sk);
+ return -EINVAL;
+ }
+
+ release_sock(sk);
+
+ return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
+ msg, len);
+ }
+
if (sk->sk_state != LLCP_CONNECTED) {
release_sock(sk);
return -ENOTCONN;
@@ -663,11 +678,28 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
return -EFAULT;
}
+ if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
+ struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
+ struct sockaddr_nfc_llcp sockaddr;
+
+ pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
+
+ sockaddr.sa_family = AF_NFC;
+ sockaddr.nfc_protocol = NFC_PROTO_NFC_DEP;
+ sockaddr.dsap = ui_cb->dsap;
+ sockaddr.ssap = ui_cb->ssap;
+
+ memcpy(msg->msg_name, &sockaddr, sizeof(sockaddr));
+ msg->msg_namelen = sizeof(sockaddr);
+ }
+
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
/* SOCK_STREAM: re-queue skb if it contains unreceived data */
- if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_RAW) {
+ if (sk->sk_type == SOCK_STREAM ||
+ sk->sk_type == SOCK_DGRAM ||
+ sk->sk_type == SOCK_RAW) {
skb_pull(skb, copied);
if (skb->len) {
skb_queue_head(&sk->sk_receive_queue, skb);
diff --git a/net/nfc/nci/Kconfig b/net/nfc/nci/Kconfig
index decdc49b26d8..6d69b5f0f19b 100644
--- a/net/nfc/nci/Kconfig
+++ b/net/nfc/nci/Kconfig
@@ -1,6 +1,6 @@
config NFC_NCI
- depends on NFC && EXPERIMENTAL
- tristate "NCI protocol support (EXPERIMENTAL)"
+ depends on NFC
+ tristate "NCI protocol support"
default n
help
NCI (NFC Controller Interface) is a communication protocol between
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index acf9abb7d99b..5f98dc1bf039 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -205,10 +205,10 @@ static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
cmd.num_disc_configs = 0;
if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
- (protocols & NFC_PROTO_JEWEL_MASK
- || protocols & NFC_PROTO_MIFARE_MASK
- || protocols & NFC_PROTO_ISO14443_MASK
- || protocols & NFC_PROTO_NFC_DEP_MASK)) {
+ (protocols & NFC_PROTO_JEWEL_MASK ||
+ protocols & NFC_PROTO_MIFARE_MASK ||
+ protocols & NFC_PROTO_ISO14443_MASK ||
+ protocols & NFC_PROTO_NFC_DEP_MASK)) {
cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
NCI_NFC_A_PASSIVE_POLL_MODE;
cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
@@ -224,8 +224,8 @@ static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
}
if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
- (protocols & NFC_PROTO_FELICA_MASK
- || protocols & NFC_PROTO_NFC_DEP_MASK)) {
+ (protocols & NFC_PROTO_FELICA_MASK ||
+ protocols & NFC_PROTO_NFC_DEP_MASK)) {
cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
NCI_NFC_F_PASSIVE_POLL_MODE;
cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
@@ -414,13 +414,13 @@ static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
struct nci_set_config_param param;
__u8 local_gb[NFC_MAX_GT_LEN];
- int i, rc = 0;
+ int i;
param.val = nfc_get_local_general_bytes(nfc_dev, &param.len);
if ((param.val == NULL) || (param.len == 0))
- return rc;
+ return 0;
- if (param.len > NCI_MAX_PARAM_LEN)
+ if (param.len > NFC_MAX_GT_LEN)
return -EINVAL;
for (i = 0; i < param.len; i++)
@@ -429,10 +429,8 @@ static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
param.id = NCI_PN_ATR_REQ_GEN_BYTES;
param.val = local_gb;
- rc = nci_request(ndev, nci_set_config_req, (unsigned long)&param,
- msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
-
- return rc;
+ return nci_request(ndev, nci_set_config_req, (unsigned long)&param,
+ msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
}
static int nci_start_poll(struct nfc_dev *nfc_dev,
@@ -579,7 +577,6 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev,
}
}
-
static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
__u8 comm_mode, __u8 *gb, size_t gb_len)
{
@@ -806,8 +803,8 @@ int nci_recv_frame(struct sk_buff *skb)
pr_debug("len %d\n", skb->len);
- if (!ndev || (!test_bit(NCI_UP, &ndev->flags)
- && !test_bit(NCI_INIT, &ndev->flags))) {
+ if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
+ !test_bit(NCI_INIT, &ndev->flags))) {
kfree_skb(skb);
return -ENXIO;
}
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index c1b5285cbde7..3568ae16786d 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -29,6 +29,8 @@
#include "nfc.h"
+#include "llcp/llcp.h"
+
static struct genl_multicast_group nfc_genl_event_mcgrp = {
.name = NFC_GENL_MCAST_EVENT_NAME,
};
@@ -364,7 +366,8 @@ static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
- nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
+ nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
+ nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
goto nla_put_failure;
return genlmsg_end(msg, hdr);
@@ -590,7 +593,7 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
!info->attrs[NFC_ATTR_PROTOCOLS]) &&
- !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
+ !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
return -EINVAL;
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
@@ -715,6 +718,146 @@ static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
return rc;
}
+static int nfc_genl_send_params(struct sk_buff *msg,
+ struct nfc_llcp_local *local,
+ u32 portid, u32 seq)
+{
+ void *hdr;
+
+ hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
+ NFC_CMD_LLC_GET_PARAMS);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
+ nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
+ nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
+ nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
+ goto nla_put_failure;
+
+ return genlmsg_end(msg, hdr);
+
+nla_put_failure:
+
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ struct nfc_llcp_local *local;
+ int rc = 0;
+ struct sk_buff *msg = NULL;
+ u32 idx;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
+ return -EINVAL;
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ device_lock(&dev->dev);
+
+ local = nfc_llcp_find_local(dev);
+ if (!local) {
+ rc = -ENODEV;
+ goto exit;
+ }
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg) {
+ rc = -ENOMEM;
+ goto exit;
+ }
+
+ rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
+
+exit:
+ device_unlock(&dev->dev);
+
+ nfc_put_device(dev);
+
+ if (rc < 0) {
+ if (msg)
+ nlmsg_free(msg);
+
+ return rc;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ struct nfc_llcp_local *local;
+ u8 rw = 0;
+ u16 miux = 0;
+ u32 idx;
+ int rc = 0;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
+ !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
+ !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
+ return -EINVAL;
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
+ rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
+
+ if (rw > LLCP_MAX_RW)
+ return -EINVAL;
+ }
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
+ miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
+
+ if (miux > LLCP_MAX_MIUX)
+ return -EINVAL;
+ }
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ device_lock(&dev->dev);
+
+ local = nfc_llcp_find_local(dev);
+ if (!local) {
+ nfc_put_device(dev);
+ rc = -ENODEV;
+ goto exit;
+ }
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
+ if (dev->dep_link_up) {
+ rc = -EINPROGRESS;
+ goto exit;
+ }
+
+ local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
+ }
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
+ local->rw = rw;
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
+ local->miux = cpu_to_be16(miux);
+
+exit:
+ device_unlock(&dev->dev);
+
+ nfc_put_device(dev);
+
+ return rc;
+}
+
static struct genl_ops nfc_genl_ops[] = {
{
.cmd = NFC_CMD_GET_DEVICE,
@@ -759,6 +902,16 @@ static struct genl_ops nfc_genl_ops[] = {
.done = nfc_genl_dump_targets_done,
.policy = nfc_genl_policy,
},
+ {
+ .cmd = NFC_CMD_LLC_GET_PARAMS,
+ .doit = nfc_genl_llc_get_params,
+ .policy = nfc_genl_policy,
+ },
+ {
+ .cmd = NFC_CMD_LLC_SET_PARAMS,
+ .doit = nfc_genl_llc_set_params,
+ .policy = nfc_genl_policy,
+ },
};
diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h
index c5e42b79a418..87d914d2876a 100644
--- a/net/nfc/nfc.h
+++ b/net/nfc/nfc.h
@@ -56,6 +56,7 @@ void nfc_llcp_unregister_device(struct nfc_dev *dev);
int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len);
u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len);
int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb);
+struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
int __init nfc_llcp_init(void);
void nfc_llcp_exit(void);
@@ -97,6 +98,11 @@ static inline int nfc_llcp_data_received(struct nfc_dev *dev,
return 0;
}
+static inline struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
+{
+ return NULL;
+}
+
static inline int nfc_llcp_init(void)
{
return 0;
diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index 8b8a6a2b2bad..313bf1bc848a 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -256,7 +256,6 @@ static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
return rc ? : copied;
}
-
static const struct proto_ops rawsock_ops = {
.family = PF_NFC,
.owner = THIS_MODULE,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.