diff --git a/ndn-cpp/c/transport/tcp-transport.h b/ndn-cpp/c/transport/tcp-transport.h
index f0b5d0c..1860002 100644
--- a/ndn-cpp/c/transport/tcp-transport.h
+++ b/ndn-cpp/c/transport/tcp-transport.h
@@ -18,27 +18,70 @@
   struct ndn_SocketTransport base;
 };
   
+/**
+ * Initialize the ndn_TcpTransport struct with default values for no connection yet.
+ * @param self A pointer to the ndn_TcpTransport struct.
+ */
 static inline void ndn_TcpTransport_init(struct ndn_TcpTransport *self)
 {
   ndn_SocketTransport_init(&self->base);
 }
 
+/**
+ * Connect with TCP to the host:port.
+ * @param self A pointer to the ndn_TcpTransport struct.
+ * @param host The host to connect to.
+ * @param port The port to connect to.
+ * @return 0 for success, else an error code.
+ */
 static inline ndn_Error ndn_TcpTransport_connect(struct ndn_TcpTransport *self, char *host, unsigned short port)
 {
   return ndn_SocketTransport_connect(&self->base, SOCKET_TCP, host, port);
 }
 
+/**
+ * Send data to the socket.
+ * @param self A pointer to the ndn_TcpTransport struct.
+ * @param data A pointer to the buffer of data to send.
+ * @param dataLength The number of bytes in data.
+ * @return 0 for success, else an error code.
+ */
 static inline ndn_Error ndn_TcpTransport_send(struct ndn_TcpTransport *self, unsigned char *data, unsigned int dataLength)
 {
   return ndn_SocketTransport_send(&self->base, data, dataLength);
 }
 
+/**
+ * Check if there is data ready on the socket to be received with ndn_TcpTransport_receive.
+ * @param self A pointer to the ndn_TcpTransport struct.
+ * @param receiveIsReady This will be set to 1 if data is ready, 0 if not.
+ * @return 0 for success, else an error code.
+ */
+static inline ndn_Error ndn_TcpTransport_receiveIsReady(struct ndn_TcpTransport *self, int *receiveIsReady)
+{
+  return ndn_SocketTransport_receiveIsReady(&self->base, receiveIsReady);
+}
+
+/**
+ * Receive data from the socket.  NOTE: This is a blocking call.  You should first call ndn_SocketTransport_receiveIsReady
+ * to make sure there is data ready to receive.
+ * @param self A pointer to the ndn_TcpTransport struct.
+ * @param buffer A pointer to the buffer to receive the data.
+ * @param bufferLength The maximum length of buffer.
+ * @param nBytes Return the number of bytes received into buffer.
+ * @return 0 for success, else an error code.
+ */
 static inline ndn_Error ndn_TcpTransport_receive
   (struct ndn_TcpTransport *self, unsigned char *buffer, unsigned int bufferLength, unsigned int *nBytes)
 {
   return ndn_SocketTransport_receive(&self->base, buffer, bufferLength, nBytes);
 }
 
+/**
+ * Close the socket.
+ * @param self A pointer to the ndn_TcpTransport struct.
+ * @return 0 for success, else an error code.
+ */
 static inline ndn_Error ndn_TcpTransport_close(struct ndn_TcpTransport *self)
 {
   return ndn_SocketTransport_close(&self->base);