DHCP metrics

This is a high-level question, but my searching hasn't yielded anything similar, thus far. Are DHCP metrics generated and accessible, somehow? Specifically, the number of each type of DHCP packet sent/received, and any DHCP-related errors generated. The status module has similar functionality, but only appears to report-on RADIUS metrics. I'm interested in, and working with, different DHCP functionality in the latest 3.x and 4.x (primarily 4.x). My 'plan-B' would likely involve some logging/log-scraping, but that will certainly have more performance overhead. Thanks, Damon