summaryrefslogtreecommitdiffhomepage
path: root/test/packetimpact/netdevs/netdevs.go
diff options
context:
space:
mode:
Diffstat (limited to 'test/packetimpact/netdevs/netdevs.go')
-rw-r--r--test/packetimpact/netdevs/netdevs.go115
1 files changed, 0 insertions, 115 deletions
diff --git a/test/packetimpact/netdevs/netdevs.go b/test/packetimpact/netdevs/netdevs.go
deleted file mode 100644
index 006988896..000000000
--- a/test/packetimpact/netdevs/netdevs.go
+++ /dev/null
@@ -1,115 +0,0 @@
-// Copyright 2020 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 netdevs contains utilities for working with network devices.
-package netdevs
-
-import (
- "fmt"
- "net"
- "regexp"
- "strconv"
- "strings"
-
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/header"
-)
-
-// A DeviceInfo represents a network device.
-type DeviceInfo struct {
- ID uint32
- MAC net.HardwareAddr
- IPv4Addr net.IP
- IPv4Net *net.IPNet
- IPv6Addr net.IP
- IPv6Net *net.IPNet
-}
-
-var (
- deviceLine = regexp.MustCompile(`^\s*(\d+): (\w+)`)
- linkLine = regexp.MustCompile(`^\s*link/\w+ ([0-9a-fA-F:]+)`)
- inetLine = regexp.MustCompile(`^\s*inet ([0-9./]+)`)
- inet6Line = regexp.MustCompile(`^\s*inet6 ([0-9a-fA-F:/]+)`)
-)
-
-// ParseDevices parses the output from `ip addr show` into a map from device
-// name to information about the device.
-//
-// Note: if multiple IPv6 addresses are assigned to a device, the last address
-// displayed by `ip addr show` will be used. This is fine for packetimpact
-// because we will always only have at most one IPv6 address assigned to each
-// device.
-func ParseDevices(cmdOutput string) (map[string]DeviceInfo, error) {
- var currentDevice string
- var currentInfo DeviceInfo
- deviceInfos := make(map[string]DeviceInfo)
- for _, line := range strings.Split(cmdOutput, "\n") {
- if m := deviceLine.FindStringSubmatch(line); m != nil {
- if currentDevice != "" {
- deviceInfos[currentDevice] = currentInfo
- }
- id, err := strconv.ParseUint(m[1], 10, 32)
- if err != nil {
- return nil, fmt.Errorf("parsing device ID %s: %w", m[1], err)
- }
- currentInfo = DeviceInfo{ID: uint32(id)}
- currentDevice = m[2]
- } else if m := linkLine.FindStringSubmatch(line); m != nil {
- mac, err := net.ParseMAC(m[1])
- if err != nil {
- return nil, err
- }
- currentInfo.MAC = mac
- } else if m := inetLine.FindStringSubmatch(line); m != nil {
- ipv4Addr, ipv4Net, err := net.ParseCIDR(m[1])
- if err != nil {
- return nil, err
- }
- currentInfo.IPv4Addr = ipv4Addr
- currentInfo.IPv4Net = ipv4Net
- } else if m := inet6Line.FindStringSubmatch(line); m != nil {
- ipv6Addr, ipv6Net, err := net.ParseCIDR(m[1])
- if err != nil {
- return nil, err
- }
- currentInfo.IPv6Addr = ipv6Addr
- currentInfo.IPv6Net = ipv6Net
- }
- }
- if currentDevice != "" {
- deviceInfos[currentDevice] = currentInfo
- }
- return deviceInfos, nil
-}
-
-// MACToIP converts the MAC address to an IPv6 link local address as described
-// in RFC 4291 page 20: https://tools.ietf.org/html/rfc4291#page-20
-func MACToIP(mac net.HardwareAddr) net.IP {
- addr := make([]byte, header.IPv6AddressSize)
- addr[0] = 0xfe
- addr[1] = 0x80
- header.EthernetAdddressToModifiedEUI64IntoBuf(tcpip.LinkAddress(mac), addr[8:])
- return net.IP(addr)
-}
-
-// FindDeviceByIP finds a DeviceInfo and device name from an IP address in the
-// output of ParseDevices.
-func FindDeviceByIP(ip net.IP, devices map[string]DeviceInfo) (string, DeviceInfo, error) {
- for dev, info := range devices {
- if info.IPv4Addr.Equal(ip) {
- return dev, info, nil
- }
- }
- return "", DeviceInfo{}, fmt.Errorf("can't find %s on any interface", ip)
-}