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// Copyright 2021 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package testutil provides helper functions for netstack unit tests.
package testutil
import (
"fmt"
"net"
"gvisor.dev/gvisor/pkg/tcpip"
)
// MustParse4 parses an IPv4 string (e.g. "192.168.1.1") into a tcpip.Address.
// Passing an IPv4-mapped IPv6 address will yield only the 4 IPv4 bytes.
func MustParse4(addr string) tcpip.Address {
ip := net.ParseIP(addr).To4()
if ip == nil {
panic(fmt.Sprintf("Parse4 expects IPv4 addresses, but was passed %q", addr))
}
return tcpip.Address(ip)
}
// MustParse6 parses an IPv6 string (e.g. "fe80::1") into a tcpip.Address. Passing
// an IPv4 address will yield an IPv4-mapped IPv6 address.
func MustParse6(addr string) tcpip.Address {
ip := net.ParseIP(addr).To16()
if ip == nil {
panic(fmt.Sprintf("Parse6 was passed malformed address %q", addr))
}
return tcpip.Address(ip)
}
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