Some profiles specify some restriction depending on the length
of the key used to encrypt the link, this adds an way to retrieve
that value from the kernel.
Current kernels don't provide this information so the size is
always zero.
---
btio/btio.c | 19 +++++++++++++++++++
btio/btio.h | 1 +
lib/bluetooth.h | 1 +
3 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/btio/btio.c b/btio/btio.c
index 0d177a3..2d71998 100644
--- a/btio/btio.c
+++ b/btio/btio.c
@@ -513,6 +513,21 @@ static int set_priority(int sock, uint32_t prio)
return 0;
}
+static gboolean get_key_size(int sock, int *size, GError **err)
+{
+ struct bt_security sec;
+ socklen_t len;
+
+ memset(&sec, 0, sizeof(sec));
+ len = sizeof(sec);
+ if (getsockopt(sock, SOL_BLUETOOTH, BT_SECURITY, &sec, &len) == 0) {
+ *size = sec.key_size;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
static gboolean l2cap_set(int sock, int sec_level, uint16_t imtu,
uint16_t omtu, uint8_t mode, int master,
int flushable, uint32_t priority, GError **err)
@@ -880,6 +895,10 @@ static gboolean l2cap_get(int sock, GError **err, BtIOOption opt1,
va_arg(args, int *), err))
return FALSE;
break;
+ case BT_IO_OPT_KEY_SIZE:
+ if (!get_key_size(sock, va_arg(args, int *), err))
+ return FALSE;
+ break;
case BT_IO_OPT_PSM:
*(va_arg(args, uint16_t *)) = src.l2_psm ?
btohs(src.l2_psm) : btohs(dst.l2_psm);
diff --git a/btio/btio.h b/btio/btio.h
index ae55b61..7e3e130 100644
--- a/btio/btio.h
+++ b/btio/btio.h
@@ -52,6 +52,7 @@ typedef enum {
BT_IO_OPT_DEST_BDADDR,
BT_IO_OPT_DEFER_TIMEOUT,
BT_IO_OPT_SEC_LEVEL,
+ BT_IO_OPT_KEY_SIZE,
BT_IO_OPT_CHANNEL,
BT_IO_OPT_SOURCE_CHANNEL,
BT_IO_OPT_DEST_CHANNEL,
diff --git a/lib/bluetooth.h b/lib/bluetooth.h
index 5bd4f03..1dee6df 100644
--- a/lib/bluetooth.h
+++ b/lib/bluetooth.h
@@ -63,6 +63,7 @@ extern "C" {
#define BT_SECURITY 4
struct bt_security {
uint8_t level;
+ uint8_t key_size;
};
#define BT_SECURITY_SDP 0
#define BT_SECURITY_LOW 1
--
1.7.8
--
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