More idiomatic Golang

internal/config/config.go

 		Blocklist    ListConfig `json:"blocklist"`
 		Allowlist    ListConfig `json:"allowlist"`
 		Doppelganger struct {
-			URLs            []TypeHttpsURL  `json:"urls"`
-			Repeats         TypeConcurrency `json:"repeats_per_raid"`
-			UpdateEach      TypeDuration    `json:"raid_each"`
-			DRS             TypeBool        `json:"drs"`
+			URLs       []TypeHttpsURL  `json:"urls"`
+			Repeats    TypeConcurrency `json:"repeats_per_raid"`
+			UpdateEach TypeDuration    `json:"raid_each"`
+			DRS        TypeBool        `json:"drs"`
 		} `json:"doppelganger"`
 	} `json:"defense"`
 	Network struct {

internal/config/parse.go

 			UpdateEach          string   `toml:"update-each" json:"updateEach,omitempty"`
 		} `toml:"allowlist" json:"allowlist,omitempty"`
 		Doppelganger struct {
-			URLs            []string `toml:"urls" json:"urls,omitempty"`
-			Repeats         uint     `toml:"repeats-per-raid" json:"repeats_per_raid,omitempty"`
-			UpdateEach      string   `toml:"raid-each" json:"raid_each,omitempty"`
-			DRS             bool     `toml:"drs" json:"drs,omitempty"`
+			URLs       []string `toml:"urls" json:"urls,omitempty"`
+			Repeats    uint     `toml:"repeats-per-raid" json:"repeats_per_raid,omitempty"`
+			UpdateEach string   `toml:"raid-each" json:"raid_each,omitempty"`
+			DRS        bool     `toml:"drs" json:"drs,omitempty"`
 		} `toml:"doppelganger" json:"doppelganger,omitempty"`
 	} `toml:"defense" json:"defense,omitempty"`
 	Network struct {

mtglib/conns.go

 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"net"
 // Both directions update the same timestamp so that activity in one direction
 // prevents the other (idle) direction from timing out.
 type idleTracker struct {
-	lastActive atomic.Int64 // unix nanos
+	lastActive atomic.Pointer[time.Time]
 	timeout    time.Duration
 }
 
 }
 
 func (t *idleTracker) touch() {
-	t.lastActive.Store(time.Now().UnixNano())
+	stamp := time.Now()
+	t.lastActive.Store(&stamp)
 }
 
 func (t *idleTracker) isIdle() bool {
-	last := time.Unix(0, t.lastActive.Load())
-
-	return time.Since(last) >= t.timeout
+	return time.Since(*t.lastActive.Load()) >= t.timeout
 }
 
 type connIdleTimeout struct {
 }
 
 func (c connIdleTimeout) Read(b []byte) (int, error) {
+	var netErr net.Error
+
 	for {
 		c.SetReadDeadline(time.Now().Add(c.tracker.timeout)) //nolint: errcheck
 
 		n, err := c.Conn.Read(b)
-		if n > 0 {
-			c.tracker.touch()
-
-			return n, err //nolint: wrapcheck
-		}
-
-		if err != nil {
-			if netErr, ok := err.(net.Error); ok && netErr.Timeout() && !c.tracker.isIdle() { //nolint: errorlint
-				continue
-			}
 
-			return 0, err //nolint: wrapcheck
+		switch {
+		case err == nil:
+			c.tracker.touch()
+			return n, nil
+		case errors.As(err, &netErr) && netErr.Timeout() && !c.tracker.isIdle():
+			continue
 		}
 
-		return 0, nil
+		return n, err
 	}
 }
 

mtglib/proxy_opts.go

 
 	// DoppelGangerDRS defines if TLS Dynamic Record Sizing is active.
 	DoppelGangerDRS bool
-
 }
 
 func (p ProxyOpts) valid() error {