Quick UDP

A simple single-header library for UDP networking.

• UDP only.
• Works on UNIX (Linux, macOS, BSD, ...) and Windows.
• Supports IPv4 and IPv6.
• No malloc - you supply storage for everything.
• Complete flow control (no call-backs), with non-blocking and blocking modes.
• No protocol, just sending and receiving of UDP packets.
• Public domain.

To build on Windows link to Winsock2 (Ws2_32).

Examples

See examples/ for more.

Usage:

Include the file like this in ONE source file then use as a normal header file in any others:

#define QUICK_UDP_IMPLEMENTATION
#include "quick_udp.h"

Send a packet:

qu_init();

qu_handle handle;
int success = qu_connect(&handle, "localhost", 4848);
if (!success) exit(1);
qu_send(&handle, "Hello", 5);

qu_shutdown();

Receive a packet:

qu_init();

qu_handle handle;
int success = qu_listen(&handle, 4848);
if (!success) exit(1);

char buffer[1024];
memset(buffer, 0, 1024);

qu_handle sender;
qu_receive(&handle, &sender, buffer, 1024 - 1);

puts(buffer);

qu_shutdown();

Entire API

int qu_init(void);
int qu_shutdown(void);
int qu_listen(qu_handle * handle, int port);
int qu_connect(qu_handle * handle, char * address, int port);
void qu_close(qu_handle * handle);
int qu_receive(qu_handle * handle, qu_handle * sender, void * buffer, size_t buffer_length);
int qu_send(qu_handle * handle, void * data, int byte_count);
int qu_disable_blocking(qu_handle * handle, int disable_blocking);
int qu_wait(qu_handle * handle, int timeout_ms);
int qu_compare(qu_handle * a, qu_handle * b);