###### (This function is part of SDL_net, a separate library from SDL.) # SDLNet_SimulateDatagramPacketLoss Enable simulated datagram socket failures. ## Header File Defined in [](https://github.com/libsdl-org/SDL_net/blob/main/include/SDL3_net/SDL_net.h) ## Syntax ```c void SDLNet_SimulateDatagramPacketLoss(SDLNet_DatagramSocket *sock, int percent_loss); ``` ## Function Parameters | | | | | ------------------------------------------------ | ---------------- | ------------------------------------------------------------------------ | | [SDLNet_DatagramSocket](SDLNet_DatagramSocket) * | **sock** | The socket to set a failure rate on. | | int | **percent_loss** | A number between 0 and 100. Higher means more failures. Zero to disable. | ## Remarks Often times, testing a networked app on your development machine--which might have a wired connection to a fast, reliable network service--won't expose bugs that happen when networks intermittently fail in the real world, when the wifi is flakey and firewalls get in the way. This function allows you to tell the library to pretend that some percentage of datagram socket data transmission will fail. The library will randomly lose packets (both incoming and outgoing) at an average matching `percent_loss`. Setting this to zero (the default) will disable the simulation. Setting to 100 means _everything_ fails unconditionally and no further data will get through. At what percent the system merely borders on unusable is left as an exercise to the app developer. This is intended for debugging purposes, to simulate real-world conditions that are various degrees of terrible. You probably should _not_ call this in production code, where you'll likely see real failures anyhow. ## Thread Safety It is safe to call this function from any thread. ## Version This function is available since SDL_Net 3.0.0. ---- [CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategorySDLNet](CategorySDLNet)