Function main

examples/io_uring-udp.c:325–403

}

int main(int argc, char *argv[])
{
	struct ctx ctx;
	int ret;
	int port = -1;
	int sockfd;
	int opt;
	struct io_uring_cqe *cqes[CQES];
	unsigned int count, i;

	memset(&ctx, 0, sizeof(ctx));
	ctx.verbose = false;
	ctx.af = AF_INET;
	ctx.buf_shift = BUF_SHIFT;

	while ((opt = getopt(argc, argv, "6vp:b:")) != -1) {
		switch (opt) {
		case '6':
			ctx.af = AF_INET6;
			break;
		case 'p':
			port = atoi(optarg);
			break;
		case 'b':
			ctx.buf_shift = atoi(optarg);
			break;
		case 'v':
			ctx.verbose = true;
			break;
		default:
			fprintf(stderr, "Usage: %s [-p port] "
					"[-b log2(BufferSize)] [-6] [-v]\n",
					argv[0]);
			exit(-1);
		}
	}

	sockfd = setup_sock(ctx.af, port);
	if (sockfd < 0)
		return 1;

	if (setup_context(&ctx)) {
		close(sockfd);
		return 1;
	}

	ret = io_uring_register_files(&ctx.ring, &sockfd, 1);
	if (ret) {
		fprintf(stderr, "register files: %s\n", strerror(-ret));
		return -1;
	}

	ret = add_recv(&ctx, 0);
	if (ret)
		return 1;

	while (true) {
		ret = io_uring_submit_and_wait(&ctx.ring, 1);