Function bbr_get_sockopt

freebsd/netinet/tcp_stacks/bbr.c:14685–14830

* return 0 on success, error-num on failure */

 * return 0 on success, error-num on failure
 */
static int
bbr_get_sockopt(struct socket *so, struct sockopt *sopt,
    struct inpcb *inp, struct tcpcb *tp, struct tcp_bbr *bbr)
{
	int32_t error, optval;

	/*
	 * Because all our options are either boolean or an int, we can just
	 * pull everything into optval and then unlock and copy. If we ever
	 * add a option that is not a int, then this will have quite an
	 * impact to this routine.
	 */
	switch (sopt->sopt_name) {
	case TCP_BBR_PACE_PER_SEC:
		optval = bbr->r_ctl.bbr_hptsi_per_second;
		break;
	case TCP_BBR_PACE_DEL_TAR:
		optval = bbr->r_ctl.bbr_hptsi_segments_delay_tar;
		break;
	case TCP_BBR_PACE_SEG_MAX:
		optval = bbr->r_ctl.bbr_hptsi_segments_max;
		break;
	case TCP_BBR_MIN_TOPACEOUT:
		optval = bbr->no_pacing_until;
		break;
	case TCP_BBR_PACE_SEG_MIN:
		optval = bbr->r_ctl.bbr_hptsi_bytes_min;
		break;
	case TCP_BBR_PACE_CROSS:
		optval = bbr->r_ctl.bbr_cross_over;
		break;
	case TCP_BBR_ALGORITHM:
		optval = bbr->rc_use_google;
		break;
	case TCP_BBR_TSLIMITS:
		optval = bbr->rc_use_ts_limit;
		break;
	case TCP_BBR_IWINTSO:
		optval = bbr->rc_init_win;
		break;
	case TCP_BBR_STARTUP_PG:
		optval = bbr->r_ctl.rc_startup_pg;
		break;
	case TCP_BBR_DRAIN_PG:
		optval = bbr->r_ctl.rc_drain_pg;
		break;
	case TCP_BBR_PROBE_RTT_INT:
		optval = bbr->r_ctl.rc_probertt_int;
		break;
	case TCP_BBR_PROBE_RTT_LEN:
		optval = (bbr->r_ctl.rc_rttprop.cur_time_limit / USECS_IN_SECOND);
		break;
	case TCP_BBR_PROBE_RTT_GAIN:
		optval = bbr->r_ctl.bbr_rttprobe_gain_val;
		break;
	case TCP_BBR_STARTUP_LOSS_EXIT:
		optval = bbr->rc_loss_exit;
		break;