---
attrib/att.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
attrib/att.h | 11 +++++++++++
2 files changed, 66 insertions(+)
diff --git a/attrib/att.c b/attrib/att.c
index 8e9c06d..e7d5682 100644
--- a/attrib/att.c
+++ b/attrib/att.c
@@ -561,6 +561,61 @@ uint16_t dec_write_cmd(const uint8_t *pdu, size_t len, uint16_t *handle,
return len;
}
+uint16_t enc_signed_write_cmd(uint16_t handle,
+ const uint8_t *value, size_t vlen,
+ const uint8_t signature[12],
+ uint8_t *pdu, size_t len)
+{
+ const uint16_t hdr_len = sizeof(pdu[0]) + sizeof(handle);
+ const uint16_t min_len = hdr_len + ATT_SIGNATURE_LEN;
+
+ if (pdu == NULL)
+ return 0;
+
+ if (vlen > len - min_len)
+ vlen = len - min_len;
+
+ pdu[0] = ATT_OP_SIGNED_WRITE_CMD;
+ put_le16(handle, &pdu[1]);
+
+ if (vlen > 0)
+ memcpy(&pdu[hdr_len], value, vlen);
+
+ memcpy(&pdu[hdr_len + vlen], signature, ATT_SIGNATURE_LEN);
+
+ return min_len + vlen;
+}
+
+uint16_t dec_signed_write_cmd(const uint8_t *pdu, size_t len,
+ uint16_t *handle,
+ uint8_t *value, size_t *vlen,
+ uint8_t signature[12])
+{
+ const uint16_t hdr_len = sizeof(pdu[0]) + sizeof(*handle);
+ const uint16_t min_len = hdr_len + ATT_SIGNATURE_LEN;
+
+
+ if (pdu == NULL)
+ return 0;
+
+ if (value == NULL || vlen == NULL || handle == NULL)
+ return 0;
+
+ if (len < min_len)
+ return 0;
+
+ if (pdu[0] != ATT_OP_SIGNED_WRITE_CMD)
+ return 0;
+
+ *vlen = len - min_len;
+ *handle = get_le16(&pdu[1]);
+ memcpy(value, pdu + hdr_len, *vlen);
+
+ memcpy(signature, pdu + hdr_len + *vlen, ATT_SIGNATURE_LEN);
+
+ return len;
+}
+
uint16_t enc_write_req(uint16_t handle, const uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len)
{
diff --git a/attrib/att.h b/attrib/att.h
index c612d80..068ddf8 100644
--- a/attrib/att.h
+++ b/attrib/att.h
@@ -22,6 +22,9 @@
*
*/
+/* Len of signature in write signed packet */
+#define ATT_SIGNATURE_LEN 12
+
/* Attribute Protocol Opcodes */
#define ATT_OP_ERROR 0x01
#define ATT_OP_MTU_REQ 0x02
@@ -129,6 +132,14 @@ uint16_t enc_write_cmd(uint16_t handle, const uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len);
uint16_t dec_write_cmd(const uint8_t *pdu, size_t len, uint16_t *handle,
uint8_t *value, size_t *vlen);
+uint16_t enc_signed_write_cmd(uint16_t handle,
+ const uint8_t *value, size_t vlen,
+ const uint8_t signature[12],
+ uint8_t *pdu, size_t len);
+uint16_t dec_signed_write_cmd(const uint8_t *pdu, size_t len,
+ uint16_t *handle,
+ uint8_t *value, size_t *vlen,
+ uint8_t signature[12]);
struct att_data_list *dec_read_by_type_resp(const uint8_t *pdu, size_t len);
uint16_t enc_write_req(uint16_t handle, const uint8_t *value, size_t vlen,
uint8_t *pdu, size_t len);
--
1.8.4
--
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