Function printPeerConcise

types/netmap/netmap.go:383–419

printPeerConcise appends to buf a line representing the peer p. If this function is changed to access different fields of p, keep in nodeConciseEqual in sync.

(buf *strings.Builder, p tailcfg.NodeView)

// If this function is changed to access different fields of p, keep
// in nodeConciseEqual in sync.
func printPeerConcise(buf *strings.Builder, p tailcfg.NodeView) {
	aip := make([]string, p.AllowedIPs().Len())
	for i, a := range p.AllowedIPs().All() {
		s := strings.TrimSuffix(a.String(), "/32")
		aip[i] = s
	}

	epStrs := make([]string, p.Endpoints().Len())
	for i, ep := range p.Endpoints().All() {
		e := ep.String()
		// Align vertically on the ':' between IP and port
		colon := strings.IndexByte(e, ':')
		spaces := 0
		for colon > 0 && len(e)+spaces-colon < 6 {
			spaces++
			colon--
		}
		epStrs[i] = fmt.Sprintf("%21v", e+strings.Repeat(" ", spaces))
	}

	derp := fmt.Sprintf("D%d", p.HomeDERP())

	var discoShort string
	if !p.DiscoKey().IsZero() {
		discoShort = p.DiscoKey().ShortString() + " "
	}

	// Most of the time, aip is just one element, so format the
	// table to look good in that case. This will also make multi-
	// subnet nodes stand out visually.
	fmt.Fprintf(buf, " %v %s%-2v %-15v : %v\n",
		p.Key().ShortString(),
		discoShort,
		derp,
		strings.Join(aip, " "),
		strings.Join(epStrs, " "))
}

// nodeConciseEqual reports whether a and b are equal for the fields accessed by printPeerConcise.
func nodeConciseEqual(a, b tailcfg.NodeView) bool {