Move network/environment to netenv
This commit is contained in:
Daniel
216
netenv/dbus_linux.go
Normal file
216
netenv/dbus_linux.go
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@@ -0,0 +1,216 @@
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// +build !server
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package netenv
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import (
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"errors"
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"fmt"
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"net"
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"sync"
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"github.com/godbus/dbus"
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)
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var (
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dbusConn *dbus.Conn
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dbusConnLock sync.Mutex
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)
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func getNameserversFromDbus() ([]Nameserver, error) { //nolint:gocognit // TODO
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// cmdline tool for exploring: gdbus introspect --system --dest org.freedesktop.NetworkManager --object-path /org/freedesktop/NetworkManager
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var nameservers []Nameserver
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var err error
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dbusConnLock.Lock()
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defer dbusConnLock.Unlock()
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if dbusConn == nil {
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dbusConn, err = dbus.SystemBus()
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}
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if err != nil {
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return nil, err
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}
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primaryConnectionVariant, err := getNetworkManagerProperty(dbusConn, dbus.ObjectPath("/org/freedesktop/NetworkManager"), "org.freedesktop.NetworkManager.PrimaryConnection")
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if err != nil {
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return nil, err
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}
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primaryConnection, ok := primaryConnectionVariant.Value().(dbus.ObjectPath)
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if !ok {
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return nil, errors.New("dbus: could not assert type of /org/freedesktop/NetworkManager:org.freedesktop.NetworkManager.PrimaryConnection")
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}
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activeConnectionsVariant, err := getNetworkManagerProperty(dbusConn, dbus.ObjectPath("/org/freedesktop/NetworkManager"), "org.freedesktop.NetworkManager.ActiveConnections")
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if err != nil {
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return nil, err
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}
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activeConnections, ok := activeConnectionsVariant.Value().([]dbus.ObjectPath)
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if !ok {
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return nil, errors.New("dbus: could not assert type of /org/freedesktop/NetworkManager:org.freedesktop.NetworkManager.ActiveConnections")
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}
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sortedConnections := []dbus.ObjectPath{primaryConnection}
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for _, activeConnection := range activeConnections {
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if !objectPathInSlice(activeConnection, sortedConnections) {
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sortedConnections = append(sortedConnections, activeConnection)
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}
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}
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for _, activeConnection := range sortedConnections {
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ip4ConfigVariant, err := getNetworkManagerProperty(dbusConn, activeConnection, "org.freedesktop.NetworkManager.Connection.Active.Ip4Config")
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if err != nil {
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return nil, err
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}
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ip4Config, ok := ip4ConfigVariant.Value().(dbus.ObjectPath)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.Connection.Active.Ip4Config", activeConnection)
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}
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nameserverIP4sVariant, err := getNetworkManagerProperty(dbusConn, ip4Config, "org.freedesktop.NetworkManager.IP4Config.Nameservers")
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if err != nil {
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return nil, err
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}
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nameserverIP4s, ok := nameserverIP4sVariant.Value().([]uint32)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.IP4Config.Nameservers", ip4Config)
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}
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nameserverDomainsVariant, err := getNetworkManagerProperty(dbusConn, ip4Config, "org.freedesktop.NetworkManager.IP4Config.Domains")
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if err != nil {
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return nil, err
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}
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nameserverDomains, ok := nameserverDomainsVariant.Value().([]string)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.IP4Config.Domains", ip4Config)
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}
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nameserverSearchesVariant, err := getNetworkManagerProperty(dbusConn, ip4Config, "org.freedesktop.NetworkManager.IP4Config.Searches")
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if err != nil {
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return nil, err
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}
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nameserverSearches, ok := nameserverSearchesVariant.Value().([]string)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.IP4Config.Searches", ip4Config)
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}
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for _, ip := range nameserverIP4s {
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a := uint8(ip / 16777216)
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b := uint8((ip % 16777216) / 65536)
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c := uint8((ip % 65536) / 256)
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d := uint8(ip % 256)
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nameservers = append(nameservers, Nameserver{
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IP: net.IPv4(d, c, b, a),
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Search: append(nameserverDomains, nameserverSearches...),
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})
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}
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ip6ConfigVariant, err := getNetworkManagerProperty(dbusConn, activeConnection, "org.freedesktop.NetworkManager.Connection.Active.Ip6Config")
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if err != nil {
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return nil, err
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}
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ip6Config, ok := ip6ConfigVariant.Value().(dbus.ObjectPath)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.Connection.Active.Ip6Config", activeConnection)
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}
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nameserverIP6sVariant, err := getNetworkManagerProperty(dbusConn, ip6Config, "org.freedesktop.NetworkManager.IP6Config.Nameservers")
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if err != nil {
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return nil, err
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}
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nameserverIP6s, ok := nameserverIP6sVariant.Value().([][]byte)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.IP6Config.Nameservers", ip6Config)
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}
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nameserverDomainsVariant, err = getNetworkManagerProperty(dbusConn, ip6Config, "org.freedesktop.NetworkManager.IP6Config.Domains")
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if err != nil {
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return nil, err
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}
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nameserverDomains, ok = nameserverDomainsVariant.Value().([]string)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.IP6Config.Domains", ip6Config)
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}
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nameserverSearchesVariant, err = getNetworkManagerProperty(dbusConn, ip6Config, "org.freedesktop.NetworkManager.IP6Config.Searches")
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if err != nil {
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return nil, err
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}
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nameserverSearches, ok = nameserverSearchesVariant.Value().([]string)
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if !ok {
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return nil, fmt.Errorf("dbus: could not assert type of %s:org.freedesktop.NetworkManager.IP6Config.Searches", ip6Config)
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}
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for _, ip := range nameserverIP6s {
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if len(ip) != 16 {
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return nil, fmt.Errorf("dbus: query returned IPv6 address (%s) with invalid length", ip)
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}
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nameservers = append(nameservers, Nameserver{
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IP: net.IP(ip),
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Search: append(nameserverDomains, nameserverSearches...),
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})
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}
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}
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return nameservers, nil
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}
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func getConnectivityStateFromDbus() (OnlineStatus, error) {
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var err error
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dbusConnLock.Lock()
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defer dbusConnLock.Unlock()
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if dbusConn == nil {
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dbusConn, err = dbus.SystemBus()
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}
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if err != nil {
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return 0, err
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}
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connectivityStateVariant, err := getNetworkManagerProperty(dbusConn, dbus.ObjectPath("/org/freedesktop/NetworkManager"), "org.freedesktop.NetworkManager.Connectivity")
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if err != nil {
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return 0, err
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}
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connectivityState, ok := connectivityStateVariant.Value().(uint32)
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if !ok {
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return 0, errors.New("dbus: could not assert type of /org/freedesktop/NetworkManager:org.freedesktop.NetworkManager.Connectivity")
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}
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// NMConnectivityState
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// NM_CONNECTIVITY_UNKNOWN = 0 Network connectivity is unknown.
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// NM_CONNECTIVITY_NONE = 1 The host is not connected to any network.
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// NM_CONNECTIVITY_PORTAL = 2 The host is behind a captive portal and cannot reach the full Internet.
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// NM_CONNECTIVITY_LIMITED = 3 The host is connected to a network, but does not appear to be able to reach the full Internet.
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// NM_CONNECTIVITY_FULL = 4 The host is connected to a network, and appears to be able to reach the full Internet.
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switch connectivityState {
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case 0:
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return StatusUnknown, nil
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case 1:
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return StatusOffline, nil
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case 2:
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return StatusPortal, nil
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case 3:
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return StatusLimited, nil
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case 4:
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return StatusOnline, nil
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}
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return StatusUnknown, nil
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}
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func getNetworkManagerProperty(conn *dbus.Conn, objectPath dbus.ObjectPath, property string) (dbus.Variant, error) {
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object := conn.Object("org.freedesktop.NetworkManager", objectPath)
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return object.GetProperty(property)
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}
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func objectPathInSlice(a dbus.ObjectPath, list []dbus.ObjectPath) bool {
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for _, b := range list {
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if string(b) == string(a) {
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return true
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}
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}
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return false
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}
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