Method set

proxy/cache.go:331–344

set stores response and upstream for req in the cache. u and l must not be nil.

(req, m *dns.Msg, u upstream.Upstream, l *slog.Logger)

// set stores response and upstream for req in the cache.  u and l must not be
// nil.
func (c *cache) set(req, m *dns.Msg, u upstream.Upstream, l *slog.Logger) {
	item := c.respToItem(m, u, l)
	if item == nil {
		return
	}

	key := msgToKey(req)
	packed := item.pack()

	c.itemsLock.Lock()
	defer c.itemsLock.Unlock()

	c.items.Set(key, packed)
}

// setWithSubnet stores response and upstream with subnet in the cache.  The
// given subnet mask and IP address are used to calculate the cache key.  u, n,