inet/ip/tnet.c

1725  * sender or if pkt_diff indicates this system enlarged the packet.
1728 tsol_pmtu_adjust(mblk_t *mp, uint32_t mtu, int pkt_diff, int af)
1748 		if (pkt_diff > 0 || src_rhtp->tpc_tp.host_type == UNLABELED) {
1760 		if (pkt_diff > 0 || src_rhtp->tpc_tp.host_type == UNLABELED)
1765 	 * Make pkt_diff non-negative and the larger of the bytes
1769 	if (pkt_diff < -label_adj)
1770 		pkt_diff = -label_adj;
1771 	if (pkt_diff > 0 && pkt_diff < mtu)
1772 		mtu -= pkt_diff;