v6: Fixed Szymon's comments (use snprintf and defines).
v5: Fixed Szymon's comments and added his fix (crash when bridge create
fails).
v4: Fixed Szymon's and Luiz's comments.
v3: Fixed Johan's comments (removed fopen, fprintf and used open and write).
v2: Fixed Johan's comments.
v1: This patch set add support for NAP role. It register NAP server and create
bnep bridge and listen for incoming connections from client devices.
On incoming connection request it accepts connection, creates bnep interface
and notifies control state and connection state infromation. Removes device
on disconnect request. Android related changes are required to enable this
role. Patches sent to respective ML.
Ravi kumar Veeramally (4):
android/pan: Register Network Access Point
android/pan: Listen for incoming connections and accept in NAP role
android/pan: Implement PAN enable HAL api at daemon side
android/pan: Remove connected PAN devices on profile unregister call
android/pan.c | 337 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 325 insertions(+), 12 deletions(-)
--
1.8.3.2
---
android/pan.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/android/pan.c b/android/pan.c
index a733d22..8ea07a4 100644
--- a/android/pan.c
+++ b/android/pan.c
@@ -750,10 +750,20 @@ bool bt_pan_register(const bdaddr_t *addr)
return true;
}
+static void pan_device_disconnected(gpointer data, gpointer user_data)
+{
+ struct pan_device *dev = data;
+
+ bt_pan_notify_conn_state(dev, HAL_PAN_STATE_DISCONNECTED);
+}
+
void bt_pan_unregister(void)
{
DBG("");
+ g_slist_foreach(devices, pan_device_disconnected, NULL);
+ devices = NULL;
+
bnep_cleanup();
ipc_unregister(HAL_SERVICE_ID_PAN);
--
1.8.3.2
Register NAP server and adds bnep bridge. Removes bridge
on destroy call. Bridge mechanism is needed when device acting
as a server and listen for incoming connections.
---
android/pan.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 107 insertions(+), 5 deletions(-)
diff --git a/android/pan.c b/android/pan.c
index 38e353d..ea0e34e 100644
--- a/android/pan.c
+++ b/android/pan.c
@@ -28,6 +28,11 @@
#include <unistd.h>
#include <fcntl.h>
#include <glib.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <net/if.h>
+#include <linux/sockios.h>
#include "btio/btio.h"
#include "lib/bluetooth.h"
@@ -45,11 +50,11 @@
#include "bluetooth.h"
#define SVC_HINT_NETWORKING 0x02
+#define BNEP_BRIDGE "bnep"
static bdaddr_t adapter_addr;
GSList *devices = NULL;
uint8_t local_role = HAL_PAN_ROLE_NONE;
-static uint32_t record_id = 0;
struct pan_device {
char iface[16];
@@ -60,6 +65,12 @@ struct pan_device {
struct bnep *session;
};
+static struct {
+ uint32_t record_id;
+} nap_dev = {
+ .record_id = 0,
+};
+
static int device_cmp(gconstpointer s, gconstpointer user_data)
{
const struct pan_device *dev = s;
@@ -297,6 +308,89 @@ failed:
ipc_send_rsp(HAL_SERVICE_ID_PAN, HAL_OP_PAN_DISCONNECT, status);
}
+static int set_forward_delay(void)
+{
+ int fd, ret;
+ char path[41];
+
+ sprintf(path, "/sys/class/net/%s/bridge/forward_delay", BNEP_BRIDGE);
+
+ fd = open(path, O_RDWR);
+ if (fd < 0)
+ return -errno;
+
+ ret = write(fd, "0", sizeof("0"));
+ close(fd);
+
+ return ret;
+}
+
+static int nap_create_bridge(void)
+{
+ int sk, err;
+
+ DBG("%s", BNEP_BRIDGE);
+
+ sk = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
+ if (sk < 0)
+ return -EOPNOTSUPP;
+
+ if (ioctl(sk, SIOCBRADDBR, BNEP_BRIDGE) < 0) {
+ err = -errno;
+ if (err != -EEXIST) {
+ close(sk);
+ return -EOPNOTSUPP;
+ }
+ }
+
+ err = set_forward_delay();
+ if (err < 0)
+ ioctl(sk, SIOCBRDELBR, BNEP_BRIDGE);
+
+ close(sk);
+
+ return err;
+}
+
+static int nap_remove_bridge(void)
+{
+ int sk, err;
+
+ DBG("%s", BNEP_BRIDGE);
+
+ sk = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
+ if (sk < 0)
+ return -EOPNOTSUPP;
+
+ err = ioctl(sk, SIOCBRDELBR, BNEP_BRIDGE);
+ close(sk);
+
+ if (err < 0)
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+static void destroy_nap_device(void)
+{
+ DBG("");
+
+ nap_remove_bridge();
+}
+
+static int register_nap_server(void)
+{
+ int err;
+
+ DBG("");
+
+ err = nap_create_bridge();
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
static void bt_pan_enable(const void *buf, uint16_t len)
{
const struct hal_cmd_pan_enable *cmd = buf;
@@ -437,11 +531,18 @@ bool bt_pan_register(const bdaddr_t *addr)
err = bnep_init();
if (err) {
error("bnep init failed");
- sdp_record_free(rec);
+ bt_adapter_remove_record(rec->handle);
+ return false;
+ }
+
+ err = register_nap_server();
+ if (err < 0) {
+ bt_adapter_remove_record(rec->handle);
+ bnep_cleanup();
return false;
}
- record_id = rec->handle;
+ nap_dev.record_id = rec->handle;
ipc_register(HAL_SERVICE_ID_PAN, cmd_handlers,
G_N_ELEMENTS(cmd_handlers));
@@ -455,6 +556,7 @@ void bt_pan_unregister(void)
bnep_cleanup();
ipc_unregister(HAL_SERVICE_ID_PAN);
- bt_adapter_remove_record(record_id);
- record_id = 0;
+ bt_adapter_remove_record(nap_dev.record_id);
+ nap_dev.record_id = 0;
+ destroy_nap_device();
}
--
1.8.3.2
Listen for incoming connections and accept it. Create bnep interface
add it to bridge and notify control and connection state information
through HAL. Remove the device on disconnect request. If android
settings UI does not have bluetooth tethering enabled it immediately
sends disconnect signal.
---
android/pan.c | 185 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 182 insertions(+), 3 deletions(-)
diff --git a/android/pan.c b/android/pan.c
index ea0e34e..d683945 100644
--- a/android/pan.c
+++ b/android/pan.c
@@ -63,12 +63,15 @@ struct pan_device {
uint8_t role;
GIOChannel *io;
struct bnep *session;
+ guint watch;
};
static struct {
uint32_t record_id;
+ GIOChannel *io;
} nap_dev = {
.record_id = 0,
+ .io = NULL,
};
static int device_cmp(gconstpointer s, gconstpointer user_data)
@@ -81,13 +84,19 @@ static int device_cmp(gconstpointer s, gconstpointer user_data)
static void pan_device_free(struct pan_device *dev)
{
+ if (dev->watch > 0) {
+ bnep_server_delete(BNEP_BRIDGE, dev->iface, &dev->dst);
+ g_source_remove(dev->watch);
+ }
+
if (dev->io) {
g_io_channel_shutdown(dev->io, FALSE, NULL);
g_io_channel_unref(dev->io);
- dev->io = NULL;
}
- bnep_free(dev->session);
+ if (dev->session)
+ bnep_free(dev->session);
+
devices = g_slist_remove(devices, dev);
g_free(dev);
@@ -298,7 +307,7 @@ static void bt_pan_disconnect(const void *buf, uint16_t len)
dev = l->data;
- if (dev->conn_state == HAL_PAN_STATE_CONNECTED)
+ if (dev->conn_state == HAL_PAN_STATE_CONNECTED && dev->session)
bnep_disconnect(dev->session);
bt_pan_notify_conn_state(dev, HAL_PAN_STATE_DISCONNECTED);
@@ -308,6 +317,154 @@ failed:
ipc_send_rsp(HAL_SERVICE_ID_PAN, HAL_OP_PAN_DISCONNECT, status);
}
+static gboolean nap_watchdog_cb(GIOChannel *chan, GIOCondition cond,
+ gpointer user_data)
+{
+ struct pan_device *dev = user_data;
+
+ DBG("disconnected");
+
+ bt_pan_notify_conn_state(dev, HAL_PAN_STATE_DISCONNECTED);
+
+ return FALSE;
+}
+static gboolean nap_setup_cb(GIOChannel *chan, GIOCondition cond,
+ gpointer user_data)
+{
+ struct pan_device *dev = user_data;
+ uint8_t packet[BNEP_MTU];
+ struct bnep_setup_conn_req *req = (void *) packet;
+ uint16_t src_role, dst_role, rsp = BNEP_CONN_NOT_ALLOWED;
+ int sk, n;
+
+ if (cond & (G_IO_ERR | G_IO_HUP | G_IO_NVAL)) {
+ error("Hangup or error or inval on BNEP socket");
+ return FALSE;
+ }
+
+ sk = g_io_channel_unix_get_fd(chan);
+
+ /* Reading BNEP_SETUP_CONNECTION_REQUEST_MSG */
+ n = read(sk, packet, sizeof(packet));
+ if (n < 0) {
+ error("read(): %s(%d)", strerror(errno), errno);
+ goto failed;
+ }
+
+ /* Highest known control command id BNEP_FILTER_MULT_ADDR_RSP 0x06 */
+ if (req->type == BNEP_CONTROL &&
+ req->ctrl > BNEP_FILTER_MULT_ADDR_RSP) {
+ error("cmd not understood");
+ bnep_send_ctrl_rsp(sk, BNEP_CONTROL, BNEP_CMD_NOT_UNDERSTOOD,
+ req->ctrl);
+ goto failed;
+ }
+
+ if (req->type != BNEP_CONTROL || req->ctrl != BNEP_SETUP_CONN_REQ) {
+ error("cmd is not BNEP_SETUP_CONN_REQ %02X %02X", req->type,
+ req->ctrl);
+ goto failed;
+ }
+
+ rsp = bnep_setup_decode(req, &dst_role, &src_role);
+ if (rsp) {
+ error("bnep_setup_decode failed");
+ goto failed;
+ }
+
+ rsp = bnep_setup_chk(dst_role, src_role);
+ if (rsp) {
+ error("benp_setup_chk failed");
+ goto failed;
+ }
+
+ if (bnep_server_add(sk, dst_role, BNEP_BRIDGE, dev->iface,
+ &dev->dst) < 0) {
+ error("server_connadd failed");
+ rsp = BNEP_CONN_NOT_ALLOWED;
+ goto failed;
+ }
+
+ rsp = BNEP_SUCCESS;
+ bnep_send_ctrl_rsp(sk, BNEP_CONTROL, BNEP_SETUP_CONN_RSP, rsp);
+
+ dev->watch = g_io_add_watch(chan, G_IO_HUP | G_IO_ERR | G_IO_NVAL,
+ nap_watchdog_cb, dev);
+ g_io_channel_unref(dev->io);
+ dev->io = NULL;
+
+ bt_pan_notify_ctrl_state(dev, HAL_PAN_CTRL_ENABLED);
+ bt_pan_notify_conn_state(dev, HAL_PAN_STATE_CONNECTED);
+
+ return FALSE;
+
+failed:
+ bnep_send_ctrl_rsp(sk, BNEP_CONTROL, BNEP_SETUP_CONN_RSP, rsp);
+ pan_device_free(dev);
+
+ return FALSE;
+}
+
+static void nap_connect_cb(GIOChannel *chan, GError *err, gpointer user_data)
+{
+ struct pan_device *dev = user_data;
+
+ DBG("");
+
+ if (err) {
+ error("%s", err->message);
+ bt_pan_notify_conn_state(dev, HAL_PAN_STATE_DISCONNECTED);
+ return;
+ }
+
+ g_io_channel_set_close_on_unref(chan, TRUE);
+ dev->watch = g_io_add_watch(chan,
+ G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
+ nap_setup_cb, dev);
+}
+
+static void nap_confirm_cb(GIOChannel *chan, gpointer data)
+{
+ struct pan_device *dev = NULL;
+ bdaddr_t dst;
+ char address[18];
+ GError *err = NULL;
+
+ DBG("");
+
+ bt_io_get(chan, &err, BT_IO_OPT_DEST_BDADDR, &dst,
+ BT_IO_OPT_DEST, address, BT_IO_OPT_INVALID);
+ if (err) {
+ error("%s", err->message);
+ g_error_free(err);
+ goto failed;
+ }
+
+ DBG("incoming connect request from %s", address);
+ dev = g_new0(struct pan_device, 1);
+ bacpy(&dev->dst, &dst);
+ local_role = HAL_PAN_ROLE_NAP;
+ dev->role = HAL_PAN_ROLE_PANU;
+
+ dev->io = g_io_channel_ref(chan);
+ g_io_channel_set_close_on_unref(dev->io, TRUE);
+
+ if (!bt_io_accept(dev->io, nap_connect_cb, dev, NULL, &err)) {
+ error("bt_io_accept: %s", err->message);
+ g_error_free(err);
+ goto failed;
+ }
+
+ devices = g_slist_append(devices, dev);
+ bt_pan_notify_conn_state(dev, HAL_PAN_STATE_CONNECTING);
+
+ return;
+
+failed:
+ g_free(dev);
+ bt_pan_notify_conn_state(dev, HAL_PAN_STATE_DISCONNECTED);
+}
+
static int set_forward_delay(void)
{
int fd, ret;
@@ -376,10 +533,17 @@ static void destroy_nap_device(void)
DBG("");
nap_remove_bridge();
+
+ if (nap_dev.io) {
+ g_io_channel_shutdown(nap_dev.io, FALSE, NULL);
+ g_io_channel_unref(nap_dev.io);
+ nap_dev.io = NULL;
+ }
}
static int register_nap_server(void)
{
+ GError *gerr;
int err;
DBG("");
@@ -388,6 +552,21 @@ static int register_nap_server(void)
if (err < 0)
return err;
+ nap_dev.io = bt_io_listen(NULL, nap_confirm_cb, NULL, NULL, &gerr,
+ BT_IO_OPT_SOURCE_BDADDR, &adapter_addr,
+ BT_IO_OPT_PSM, BNEP_PSM,
+ BT_IO_OPT_SEC_LEVEL, BT_IO_SEC_MEDIUM,
+ BT_IO_OPT_OMTU, BNEP_MTU,
+ BT_IO_OPT_IMTU, BNEP_MTU,
+ BT_IO_OPT_INVALID);
+
+ if (!nap_dev.io) {
+ destroy_nap_device();
+ error("%s", gerr->message);
+ g_error_free(gerr);
+ return -EINVAL;
+ }
+
return 0;
}
--
1.8.3.2
---
android/pan.c | 30 ++++++++++++++++++++++++++----
1 file changed, 26 insertions(+), 4 deletions(-)
diff --git a/android/pan.c b/android/pan.c
index d683945..a733d22 100644
--- a/android/pan.c
+++ b/android/pan.c
@@ -574,18 +574,40 @@ static void bt_pan_enable(const void *buf, uint16_t len)
{
const struct hal_cmd_pan_enable *cmd = buf;
uint8_t status;
+ int err;
+
+ DBG("");
+
+ if (local_role == cmd->local_role) {
+ status = HAL_STATUS_SUCCESS;
+ goto reply;
+ }
+
+ /* destroy existing server */
+ destroy_nap_device();
switch (cmd->local_role) {
- case HAL_PAN_ROLE_PANU:
case HAL_PAN_ROLE_NAP:
- DBG("Not Implemented");
- status = HAL_STATUS_FAILED;
break;
+ case HAL_PAN_ROLE_NONE:
+ status = HAL_STATUS_SUCCESS;
+ goto reply;
default:
status = HAL_STATUS_UNSUPPORTED;
- break;
+ goto reply;
}
+ local_role = cmd->local_role;
+ err = register_nap_server();
+ if (err < 0) {
+ status = HAL_STATUS_FAILED;
+ destroy_nap_device();
+ goto reply;
+ }
+
+ status = HAL_STATUS_SUCCESS;
+
+reply:
ipc_send_rsp(HAL_SERVICE_ID_PAN, HAL_OP_PAN_ENABLE, status);
}
--
1.8.3.2