From 9427f5dc51c6962692eecd7250f2a1130dbc49ad Mon Sep 17 00:00:00 2001
From: Marcel Holtmann <marcel@holtmann.org>
Date: Thu, 4 Nov 2004 11:21:34 +0000
Subject: Add hci_change_link_key() function

---
 include/hci.h     | 13 +++++++++++++
 include/hci_lib.h |  1 +
 src/hci.c         | 36 +++++++++++++++++++++++++++++++++---
 3 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/include/hci.h b/include/hci.h
index 00f2d21a..c8c3aa16 100644
--- a/include/hci.h
+++ b/include/hci.h
@@ -370,6 +370,12 @@ typedef struct {
 } __attribute__ ((packed)) set_conn_encrypt_cp;
 #define SET_CONN_ENCRYPT_CP_SIZE 3
 
+#define OCF_CHANGE_CONN_LINK_KEY	0x0015
+typedef struct {
+	uint16_t	handle;
+} __attribute__ ((packed)) change_conn_link_key_cp;
+#define CHANGE_CONN_LINK_KEY_CP_SIZE 2
+
 #define OCF_REMOTE_NAME_REQ		0x0019
 typedef struct {
 	bdaddr_t	bdaddr;
@@ -860,6 +866,13 @@ typedef struct {
 } __attribute__ ((packed)) evt_encrypt_change;
 #define EVT_ENCRYPT_CHANGE_SIZE 5
 
+#define EVT_CHANGE_CONN_LINK_KEY_COMPLETE	0x09
+typedef struct {
+	uint8_t		status;
+	uint16_t	handle;
+}  __attribute__ ((packed)) evt_change_conn_link_key_complete;
+#define EVT_CHANGE_CONN_LINK_KEY_COMPLETE_SIZE 3
+
 #define EVT_READ_REMOTE_FEATURES_COMPLETE	0x0B
 typedef struct {
 	uint8_t		status;
diff --git a/include/hci_lib.h b/include/hci_lib.h
index e40a1afd..0d9867f9 100644
--- a/include/hci_lib.h
+++ b/include/hci_lib.h
@@ -84,6 +84,7 @@ int hci_read_current_iac_lap(int dd, uint8_t *num_iac, uint8_t *lap, int to);
 int hci_write_current_iac_lap(int dd, uint8_t num_iac, uint8_t *lap, int to);
 int hci_authenticate_link(int dd, uint16_t handle, int to);
 int hci_encrypt_link(int dd, uint16_t handle, uint8_t encrypt, int to);
+int hci_change_link_key(int dd, uint16_t handle, int to);
 /* role == 0 is master, 1 is slave */
 int hci_switch_role(int dd, bdaddr_t *bdaddr, uint8_t role, int to);
 int hci_park_mode(int dd, uint16_t handle, uint16_t max_interval, uint16_t min_interval, int to);
diff --git a/src/hci.c b/src/hci.c
index d3892bbc..23f890a6 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -1174,12 +1174,13 @@ int hci_authenticate_link(int dd, uint16_t handle, int to)
 	struct hci_request rq;
 
 	cp.handle = handle;
+
 	rq.ogf    = OGF_LINK_CTL;
 	rq.ocf    = OCF_AUTH_REQUESTED;
+	rq.event  = EVT_AUTH_COMPLETE;
 	rq.cparam = &cp;
 	rq.clen   = AUTH_REQUESTED_CP_SIZE;
 	rq.rparam = &rp;
-	rq.event  = EVT_AUTH_COMPLETE;
 	rq.rlen   = EVT_AUTH_COMPLETE_SIZE;
 
 	if (hci_send_req(dd, &rq, to) < 0)
@@ -1201,13 +1202,14 @@ int hci_encrypt_link(int dd, uint16_t handle, uint8_t encrypt, int to)
 
 	cp.handle  = handle;
 	cp.encrypt = encrypt;
+
 	rq.ogf     = OGF_LINK_CTL;
 	rq.ocf     = OCF_SET_CONN_ENCRYPT;
+	rq.event   = EVT_ENCRYPT_CHANGE;
 	rq.cparam  = &cp;
 	rq.clen    = SET_CONN_ENCRYPT_CP_SIZE;
-	rq.event   = EVT_ENCRYPT_CHANGE;
-	rq.rlen    = EVT_ENCRYPT_CHANGE_SIZE;
 	rq.rparam  = &rp;
+	rq.rlen    = EVT_ENCRYPT_CHANGE_SIZE;
 
 	if (hci_send_req(dd, &rq, to) < 0)
 		return -1;
@@ -1216,6 +1218,34 @@ int hci_encrypt_link(int dd, uint16_t handle, uint8_t encrypt, int to)
 		errno = EIO;
 		return -1;
 	}
+
+	return 0;
+}
+
+int hci_change_link_key(int dd, uint16_t handle, int to)
+{
+	change_conn_link_key_cp cp;
+	evt_change_conn_link_key_complete rp;
+	struct hci_request rq;
+
+	cp.handle = handle;
+
+	rq.ogf    = OGF_LINK_CTL;
+	rq.ocf    = OCF_CHANGE_CONN_LINK_KEY;
+	rq.event  = EVT_CHANGE_CONN_LINK_KEY_COMPLETE;
+	rq.cparam = &cp;
+	rq.clen   = CHANGE_CONN_LINK_KEY_CP_SIZE;
+	rq.rparam = &rp;
+	rq.rlen   = EVT_CHANGE_CONN_LINK_KEY_COMPLETE_SIZE;
+
+	if (hci_send_req(dd, &rq, to) < 0)
+		return -1;
+
+	if (rp.status) {
+		errno = EIO;
+		return -1;
+	}
+
 	return 0;
 }
 
-- 
cgit