Add encode_tid_req() in PLDM base.

Signed-off-by: Sridevi Ramesh <sridevra@in.ibm.com>
Change-Id: I9f9815753a415f9c841a6113bc0ea54b1d5670ce
diff --git a/libpldm/base.c b/libpldm/base.c
index b34045c..0447112 100644
--- a/libpldm/base.c
+++ b/libpldm/base.c
@@ -323,6 +323,20 @@
 	return PLDM_SUCCESS;
 }
 
+int encode_get_tid_req(uint8_t instance_id, struct pldm_msg *msg)
+{
+	if (msg == NULL) {
+		return PLDM_ERROR_INVALID_DATA;
+	}
+
+	struct pldm_header_info header = {0};
+	header.instance = instance_id;
+	header.msg_type = PLDM_REQUEST;
+	header.command = PLDM_GET_TID;
+	pack_pldm_header(&header, &(msg->hdr));
+
+	return PLDM_SUCCESS;
+}
 int encode_get_tid_resp(uint8_t instance_id, uint8_t completion_code,
 			uint8_t tid, struct pldm_msg *msg)
 {
diff --git a/libpldm/base.h b/libpldm/base.h
index 9d7961a..d0e917f 100644
--- a/libpldm/base.h
+++ b/libpldm/base.h
@@ -397,8 +397,20 @@
 			   uint32_t *transfer_handle, uint8_t *transfer_opflag,
 			   uint8_t *type);
 
+/* Requester */
+
 /* GetTID */
 
+/** @brief Create a PLDM request message for GetTID
+ *
+ *  @param[in] instance_id - Message's instance id
+ *  @param[in,out] msg - Message will be written to this
+ *  @return pldm_completion_codes
+ *  @note  Caller is responsible for memory alloc and dealloc of param
+ *         'msg.payload'
+ */
+int encode_get_tid_req(uint8_t instance_id, struct pldm_msg *msg);
+
 /** @brief Create a PLDM response message for GetTID
  *
  *  @param[in] instance_id - Message's instance id
diff --git a/test/libpldm_base_test.cpp b/test/libpldm_base_test.cpp
index af3a2af..ffa76de 100644
--- a/test/libpldm_base_test.cpp
+++ b/test/libpldm_base_test.cpp
@@ -439,6 +439,14 @@
     ASSERT_EQ(versionOut.alpha, version.alpha);
 }
 
+TEST(GetTID, testEncodeRequest)
+{
+    pldm_msg request{};
+
+    auto rc = encode_get_tid_req(0, &request);
+    ASSERT_EQ(rc, PLDM_SUCCESS);
+}
+
 TEST(GetTID, testEncodeResponse)
 {
     uint8_t completionCode = 0;