| .. zephyr:code-sample:: so_txtime |
| :name: UDP sender using SO_TXTIME |
| :relevant-api: bsd_sockets ethernet |
| |
| Control the transmission time of a packet using SO_TXTIME socket option. |
| |
| Overview |
| ******** |
| |
| This sample is a simple UDP sender/receiver which will set the |
| SO_TXTIME socket option and expects the Ethernet driver to send |
| the data when the TX time is expected. The application requires |
| that the board has PTP clock support. A simulated PTP clock is |
| provided for qemu_x86 board. Also frdm_k64f and sam_e70_xplained/same70q21 boards |
| are supported. Other mcux or gmac Ethernet driver based boards should |
| work too. |
| User can control how long the application should wait between packets sent by |
| setting :kconfig:option:`CONFIG_NET_SAMPLE_PACKET_INTERVAL` option. |
| Also the TXTIME value can be specified in the config file by setting the |
| :kconfig:option:`CONFIG_NET_SAMPLE_PACKET_TXTIME` option. In this case the value is |
| used as an offset from the current time. |
| |
| Building and Running |
| ******************** |
| |
| When the application is run, it starts to send UDP packets. You can start |
| ``echo-server`` application from `net-tools`_ project to catch these and |
| send the data back to this application. Optionally you can set |
| :kconfig:option:`CONFIG_NET_SAMPLE_PACKET_SOCKET` option, which makes the application |
| to create an ``AF_PACKET`` type socket. In this case, the ``echo-server`` |
| application cannot be used as a peer. |
| |
| This sample can be built and executed on qemu_x86 board as |
| described in :ref:`networking_with_host`. |
| |
| .. _`net-tools`: https://github.com/zephyrproject-rtos/net-tools |
