[chore] Validate/set account domain (#619)

* add miekg/dns dependency

* set/validate accountDomain

1 files changed, 25 insertions, 0 deletions

diff --git a/vendor/golang.org/x/net/ipv4/sys_bpf.go b/vendor/golang.org/x/net/ipv4/sys_bpf.go
new file mode 100644
index 000000000..fb11e324e
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_bpf.go
@@ -0,0 +1,25 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux
+// +build linux
+
+package ipv4
+
+import (
+	"unsafe"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+	"golang.org/x/sys/unix"
+)
+
+func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error {
+	prog := unix.SockFprog{
+		Len:    uint16(len(f)),
+		Filter: (*unix.SockFilter)(unsafe.Pointer(&f[0])),
+	}
+	b := (*[unix.SizeofSockFprog]byte)(unsafe.Pointer(&prog))[:unix.SizeofSockFprog]
+	return so.Set(c, b)
+}