Agent retries on connection loss, sends connection info (v4 v6) Uses system CA for mTLS. Removed server endpoints.

agent/internal/host/host.go

@@ -0,0 +1,57 @@
+package host
+
+import (
+	"net"
+	"os"
+)
+
+type Info struct {
+	Hostname string
+	IPv4     string
+	IPv6     string
+}
+
+func Detect() Info {
+	hostname, _ := os.Hostname()
+	info := Info{Hostname: hostname}
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return info
+	}
+	for _, iface := range ifaces {
+		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
+			continue
+		}
+		addrs, err := iface.Addrs()
+		if err != nil {
+			continue
+		}
+		for _, addr := range addrs {
+			var ip net.IP
+			switch v := addr.(type) {
+			case *net.IPNet:
+				ip = v.IP
+			case *net.IPAddr:
+				ip = v.IP
+			default:
+				continue
+			}
+			if ip == nil || ip.IsLoopback() || ip.IsUnspecified() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
+				continue
+			}
+			if ip4 := ip.To4(); ip4 != nil {
+				if info.IPv4 == "" {
+					info.IPv4 = ip4.String()
+				}
+				continue
+			}
+			if ip.To16() != nil && info.IPv6 == "" {
+				info.IPv6 = ip.String()
+			}
+		}
+		if info.IPv4 != "" && info.IPv6 != "" {
+			break
+		}
+	}
+	return info
+}