misc: decoupled session record loading to external package

vendor/github.com/mdlayher/raw/timeout_bsd.go

@@ -0,0 +1,26 @@
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package raw
+
+import (
+	"time"
+)
+
+const (
+	// Maximum read timeout per syscall.
+	// It is required because read/recvfrom won't be interrupted on closing of the file descriptor.
+	readTimeout = 200 * time.Millisecond
+)
+
+// Copyright (c) 2012 The Go Authors. All rights reserved.
+// Source code in this file is based on src/net/interface_linux.go,
+// from the Go standard library.  The Go license can be found here:
+// https://golang.org/LICENSE.
+
+// Taken from:
+// https://github.com/golang/go/blob/master/src/net/net.go#L417-L421.
+type timeoutError struct{}
+
+func (e *timeoutError) Error() string   { return "i/o timeout" }
+func (e *timeoutError) Timeout() bool   { return true }
+func (e *timeoutError) Temporary() bool { return true }