work on controlling the socket buffer sizes from the front end api

2 files changed, 19 insertions, 0 deletions

diff --git a/host/include/uhd/transport/udp_zero_copy.hpp b/host/include/uhd/transport/udp_zero_copy.hpp
index fd1cec46e..117f24b2f 100644
--- a/host/include/uhd/transport/udp_zero_copy.hpp
+++ b/host/include/uhd/transport/udp_zero_copy.hpp
@@ -52,6 +52,21 @@ public:
      * \param port a string representing the destination port
      */
     static sptr make(const std::string &addr, const std::string &port);
+
+    /*!
+     * The the rx buffer size on the socket.
+     * \param num_bytes the new size for the socket buffer
+     * \return the actual number of bytes allowed by the OS
+     */
+    virtual size_t set_recv_buff_size(size_t num_bytes) = 0;
+
+    /*!
+     * The the tx buffer size on the socket.
+     * \param num_bytes the new size for the socket buffer
+     * \return the actual number of bytes allowed by the OS
+     */
+    virtual size_t set_send_buff_size(size_t num_bytes) = 0;
+
 };
 
 }} //namespace
diff --git a/host/include/uhd/usrp/usrp2.hpp b/host/include/uhd/usrp/usrp2.hpp
index 613b40ae3..7387e5dd4 100644
--- a/host/include/uhd/usrp/usrp2.hpp
+++ b/host/include/uhd/usrp/usrp2.hpp
@@ -35,6 +35,10 @@ public:
      * hint["addr"] = address, where address is a resolvable address
      * or ip address, which may or may not be a broadcast address.
      *
+     * Other optional device address keys:
+     *   recv_buff_size: resizes the recv buffer on the data socket
+     *   send_buff_size: resizes the send buffer on the data socket
+     *
      * \param hint a device addr with the usrp2 address filled in
      * \return a vector of device addresses for all usrp2s found
      */