[PATCH 1/1] Implempent READ_BLOB encoding for ATT.

[Brian Gix <bgix@codeaurora.org>]

Added enc_read_blob_req() API to ATT transport, to enable
the reading of attributes that exceed the length of the
MTU.

The packet composed conforms to the Bluetooth Core v4.0 specification.

Brian Gix
bgix@codeaurora.org
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum 

---
 attrib/att.c |   18 ++++++++++++++++++
 attrib/att.h |    2 ++
 2 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/attrib/att.c b/attrib/att.c
index 445b192..d0879f8 100644
--- a/attrib/att.c
+++ b/attrib/att.c
@@ -542,6 +542,24 @@ uint16_t enc_read_req(uint16_t handle, uint8_t *pdu, int len)
 	return min_len;
 }
 
+uint16_t enc_read_blob_req(uint16_t handle, uint16_t offset, uint8_t *pdu,
+			   						int len)
+{
+	const uint16_t min_len = sizeof(pdu[0]) + sizeof(handle) + sizeof(offset);
+
+	if (pdu == NULL)
+		return 0;
+
+	if (len < min_len)
+		return 0;
+
+	pdu[0] = ATT_OP_READ_BLOB_REQ;
+	att_put_u16(handle, &pdu[1]);
+	att_put_u16(offset, &pdu[3]);
+
+	return min_len;
+}
+
 uint16_t dec_read_req(const uint8_t *pdu, int len, uint16_t *handle)
 {
 	const uint16_t min_len = sizeof(pdu[0]) + sizeof(*handle);
diff --git a/attrib/att.h b/attrib/att.h
index 2c8c724..46bdad4 100644
--- a/attrib/att.h
+++ b/attrib/att.h
@@ -202,6 +202,8 @@ uint16_t enc_write_req(uint16_t handle, const uint8_t *value, int vlen,
 uint16_t dec_write_req(const uint8_t *pdu, int len, uint16_t *handle,
 						uint8_t *value, int *vlen);
 uint16_t enc_read_req(uint16_t handle, uint8_t *pdu, int len);
+uint16_t enc_read_blob_req(uint16_t handle, uint16_t offset, uint8_t *pdu,
+			   						int len);
 uint16_t dec_read_req(const uint8_t *pdu, int len, uint16_t *handle);
 uint16_t enc_read_resp(uint8_t *value, int vlen, uint8_t *pdu, int len);
 uint16_t dec_read_resp(const uint8_t *pdu, int len, uint8_t *value, int *vlen);
-- 
1.7.1