diff options
Diffstat (limited to 'vendor')
29 files changed, 3943 insertions, 0 deletions
diff --git a/vendor/github.com/containers/common/libnetwork/cni/README.md b/vendor/github.com/containers/common/libnetwork/cni/README.md new file mode 100644 index 000000000..6f57feff5 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/cni/README.md @@ -0,0 +1,10 @@ +This package abstracts CNI from libpod. +It implements the `ContainerNetwork` interface defined in [libpod/network/types/network.go](../types/network.go) for the CNI backend. + + +## Testing +Run the tests with: +``` +go test -v -mod=vendor -cover ./libpod/network/cni/ +``` +Run the tests as root to also test setup/teardown. This will execute CNI and therefore the cni plugins have to be installed. diff --git a/vendor/github.com/containers/common/libnetwork/cni/cni_conversion.go b/vendor/github.com/containers/common/libnetwork/cni/cni_conversion.go new file mode 100644 index 000000000..dedb40ad3 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/cni/cni_conversion.go @@ -0,0 +1,378 @@ +// +build linux + +package cni + +import ( + "encoding/json" + "io/ioutil" + "net" + "os" + "path/filepath" + "strconv" + "strings" + "syscall" + "time" + + "github.com/containernetworking/cni/libcni" + internalutil "github.com/containers/common/libnetwork/internal/util" + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/libnetwork/util" + pkgutil "github.com/containers/common/pkg/util" + "github.com/pkg/errors" + "github.com/sirupsen/logrus" +) + +func createNetworkFromCNIConfigList(conf *libcni.NetworkConfigList, confPath string) (*types.Network, error) { + network := types.Network{ + Name: conf.Name, + ID: getNetworkIDFromName(conf.Name), + Labels: map[string]string{}, + Options: map[string]string{}, + IPAMOptions: map[string]string{}, + } + + cniJSON := make(map[string]interface{}) + err := json.Unmarshal(conf.Bytes, &cniJSON) + if err != nil { + return nil, errors.Wrapf(err, "failed to unmarshal network config %s", conf.Name) + } + if args, ok := cniJSON["args"]; ok { + if key, ok := args.(map[string]interface{}); ok { + // read network labels and options from the conf file + network.Labels = getNetworkArgsFromConfList(key, podmanLabelKey) + network.Options = getNetworkArgsFromConfList(key, podmanOptionsKey) + } + } + + f, err := os.Stat(confPath) + if err != nil { + return nil, err + } + stat := f.Sys().(*syscall.Stat_t) + network.Created = time.Unix(int64(stat.Ctim.Sec), int64(stat.Ctim.Nsec)) + + firstPlugin := conf.Plugins[0] + network.Driver = firstPlugin.Network.Type + + switch firstPlugin.Network.Type { + case types.BridgeNetworkDriver: + var bridge hostLocalBridge + err := json.Unmarshal(firstPlugin.Bytes, &bridge) + if err != nil { + return nil, errors.Wrapf(err, "failed to unmarshal the bridge plugin config in %s", confPath) + } + network.NetworkInterface = bridge.BrName + + // if isGateway is false we have an internal network + if !bridge.IsGW { + network.Internal = true + } + + // set network options + if bridge.MTU != 0 { + network.Options["mtu"] = strconv.Itoa(bridge.MTU) + } + if bridge.Vlan != 0 { + network.Options["vlan"] = strconv.Itoa(bridge.Vlan) + } + + err = convertIPAMConfToNetwork(&network, &bridge.IPAM, confPath) + if err != nil { + return nil, err + } + + case types.MacVLANNetworkDriver, types.IPVLANNetworkDriver: + var vlan VLANConfig + err := json.Unmarshal(firstPlugin.Bytes, &vlan) + if err != nil { + return nil, errors.Wrapf(err, "failed to unmarshal the macvlan plugin config in %s", confPath) + } + network.NetworkInterface = vlan.Master + + // set network options + if vlan.MTU != 0 { + network.Options["mtu"] = strconv.Itoa(vlan.MTU) + } + + if vlan.Mode != "" { + network.Options["mode"] = vlan.Mode + } + + err = convertIPAMConfToNetwork(&network, &vlan.IPAM, confPath) + if err != nil { + return nil, err + } + + default: + // A warning would be good but users would get this warning every time so keep this at info level. + logrus.Infof("Unsupported CNI config type %s in %s, this network can still be used but inspect or list cannot show all information", + firstPlugin.Network.Type, confPath) + } + + // check if the dnsname plugin is configured + network.DNSEnabled = findPluginByName(conf.Plugins, "dnsname") + + return &network, nil +} + +func findPluginByName(plugins []*libcni.NetworkConfig, name string) bool { + for _, plugin := range plugins { + if plugin.Network.Type == name { + return true + } + } + return false +} + +// convertIPAMConfToNetwork converts A cni IPAMConfig to libpod network subnets. +// It returns an array of subnets and an extra bool if dhcp is configured. +func convertIPAMConfToNetwork(network *types.Network, ipam *ipamConfig, confPath string) error { + if ipam.PluginType == types.DHCPIPAMDriver { + network.IPAMOptions["driver"] = types.DHCPIPAMDriver + return nil + } + + if ipam.PluginType != types.HostLocalIPAMDriver { + return errors.Errorf("unsupported ipam plugin %s in %s", ipam.PluginType, confPath) + } + + network.IPAMOptions["driver"] = types.HostLocalIPAMDriver + for _, r := range ipam.Ranges { + for _, ipam := range r { + s := types.Subnet{} + + // Do not use types.ParseCIDR() because we want the ip to be + // the network address and not a random ip in the sub. + _, sub, err := net.ParseCIDR(ipam.Subnet) + if err != nil { + return err + } + s.Subnet = types.IPNet{IPNet: *sub} + + // gateway + var gateway net.IP + if ipam.Gateway != "" { + gateway = net.ParseIP(ipam.Gateway) + if gateway == nil { + return errors.Errorf("failed to parse gateway ip %s", ipam.Gateway) + } + // convert to 4 byte if ipv4 + util.NormalizeIP(&gateway) + } else if !network.Internal { + // only add a gateway address if the network is not internal + gateway, err = util.FirstIPInSubnet(sub) + if err != nil { + return errors.Errorf("failed to get first ip in subnet %s", sub.String()) + } + } + s.Gateway = gateway + + var rangeStart net.IP + var rangeEnd net.IP + if ipam.RangeStart != "" { + rangeStart = net.ParseIP(ipam.RangeStart) + if rangeStart == nil { + return errors.Errorf("failed to parse range start ip %s", ipam.RangeStart) + } + } + if ipam.RangeEnd != "" { + rangeEnd = net.ParseIP(ipam.RangeEnd) + if rangeEnd == nil { + return errors.Errorf("failed to parse range end ip %s", ipam.RangeEnd) + } + } + if rangeStart != nil || rangeEnd != nil { + s.LeaseRange = &types.LeaseRange{} + s.LeaseRange.StartIP = rangeStart + s.LeaseRange.EndIP = rangeEnd + } + if util.IsIPv6(s.Subnet.IP) { + network.IPv6Enabled = true + } + network.Subnets = append(network.Subnets, s) + } + } + return nil +} + +// getNetworkArgsFromConfList returns the map of args in a conflist, argType should be labels or options +func getNetworkArgsFromConfList(args map[string]interface{}, argType string) map[string]string { + if args, ok := args[argType]; ok { + if labels, ok := args.(map[string]interface{}); ok { + result := make(map[string]string, len(labels)) + for k, v := range labels { + if v, ok := v.(string); ok { + result[k] = v + } + } + return result + } + } + return map[string]string{} +} + +// createCNIConfigListFromNetwork will create a cni config file from the given network. +// It returns the cni config and the path to the file where the config was written. +// Set writeToDisk to false to only add this network into memory. +func (n *cniNetwork) createCNIConfigListFromNetwork(network *types.Network, writeToDisk bool) (*libcni.NetworkConfigList, string, error) { + var ( + routes []ipamRoute + ipamRanges [][]ipamLocalHostRangeConf + ipamConf ipamConfig + err error + ) + if len(network.Subnets) > 0 { + for _, subnet := range network.Subnets { + route, err := newIPAMDefaultRoute(util.IsIPv6(subnet.Subnet.IP)) + if err != nil { + return nil, "", err + } + routes = append(routes, route) + ipam := newIPAMLocalHostRange(subnet.Subnet, subnet.LeaseRange, subnet.Gateway) + ipamRanges = append(ipamRanges, []ipamLocalHostRangeConf{*ipam}) + } + ipamConf = newIPAMHostLocalConf(routes, ipamRanges) + } else { + ipamConf = ipamConfig{PluginType: "dhcp"} + } + + vlan := 0 + mtu := 0 + vlanPluginMode := "" + for k, v := range network.Options { + switch k { + case "mtu": + mtu, err = internalutil.ParseMTU(v) + if err != nil { + return nil, "", err + } + + case "vlan": + vlan, err = internalutil.ParseVlan(v) + if err != nil { + return nil, "", err + } + + case "mode": + switch network.Driver { + case types.MacVLANNetworkDriver: + if !pkgutil.StringInSlice(v, types.ValidMacVLANModes) { + return nil, "", errors.Errorf("unknown macvlan mode %q", v) + } + case types.IPVLANNetworkDriver: + if !pkgutil.StringInSlice(v, types.ValidIPVLANModes) { + return nil, "", errors.Errorf("unknown ipvlan mode %q", v) + } + default: + return nil, "", errors.Errorf("cannot set option \"mode\" with driver %q", network.Driver) + } + vlanPluginMode = v + + default: + return nil, "", errors.Errorf("unsupported network option %s", k) + } + } + + isGateway := true + ipMasq := true + if network.Internal { + isGateway = false + ipMasq = false + } + // create CNI plugin configuration + // explicitly use CNI version 0.4.0 here, to use v1.0.0 at least containernetwork-plugins-1.0.1 has to be installed + // the dnsname plugin also needs to be updated for 1.0.0 + // TODO change to 1.0.0 when most distros support it + ncList := newNcList(network.Name, "0.4.0", network.Labels, network.Options) + var plugins []interface{} + + switch network.Driver { + case types.BridgeNetworkDriver: + bridge := newHostLocalBridge(network.NetworkInterface, isGateway, ipMasq, mtu, vlan, &ipamConf) + plugins = append(plugins, bridge, newPortMapPlugin(), newFirewallPlugin(), newTuningPlugin()) + // if we find the dnsname plugin we add configuration for it + if hasDNSNamePlugin(n.cniPluginDirs) && network.DNSEnabled { + // Note: in the future we might like to allow for dynamic domain names + plugins = append(plugins, newDNSNamePlugin(defaultPodmanDomainName)) + } + + case types.MacVLANNetworkDriver: + plugins = append(plugins, newVLANPlugin(types.MacVLANNetworkDriver, network.NetworkInterface, vlanPluginMode, mtu, &ipamConf)) + + case types.IPVLANNetworkDriver: + plugins = append(plugins, newVLANPlugin(types.IPVLANNetworkDriver, network.NetworkInterface, vlanPluginMode, mtu, &ipamConf)) + + default: + return nil, "", errors.Errorf("driver %q is not supported by cni", network.Driver) + } + ncList["plugins"] = plugins + b, err := json.MarshalIndent(ncList, "", " ") + if err != nil { + return nil, "", err + } + cniPathName := "" + if writeToDisk { + cniPathName = filepath.Join(n.cniConfigDir, network.Name+".conflist") + err = ioutil.WriteFile(cniPathName, b, 0644) + if err != nil { + return nil, "", err + } + f, err := os.Stat(cniPathName) + if err != nil { + return nil, "", err + } + stat := f.Sys().(*syscall.Stat_t) + network.Created = time.Unix(int64(stat.Ctim.Sec), int64(stat.Ctim.Nsec)) + } else { + network.Created = time.Now() + } + config, err := libcni.ConfListFromBytes(b) + if err != nil { + return nil, "", err + } + return config, cniPathName, nil +} + +func convertSpecgenPortsToCNIPorts(ports []types.PortMapping) ([]cniPortMapEntry, error) { + cniPorts := make([]cniPortMapEntry, 0, len(ports)) + for _, port := range ports { + if port.Protocol == "" { + return nil, errors.New("port protocol should not be empty") + } + protocols := strings.Split(port.Protocol, ",") + + for _, protocol := range protocols { + if !pkgutil.StringInSlice(protocol, []string{"tcp", "udp", "sctp"}) { + return nil, errors.Errorf("unknown port protocol %s", protocol) + } + cniPort := cniPortMapEntry{ + HostPort: int(port.HostPort), + ContainerPort: int(port.ContainerPort), + HostIP: port.HostIP, + Protocol: protocol, + } + cniPorts = append(cniPorts, cniPort) + for i := 1; i < int(port.Range); i++ { + cniPort := cniPortMapEntry{ + HostPort: int(port.HostPort) + i, + ContainerPort: int(port.ContainerPort) + i, + HostIP: port.HostIP, + Protocol: protocol, + } + cniPorts = append(cniPorts, cniPort) + } + } + } + return cniPorts, nil +} + +func removeMachinePlugin(conf *libcni.NetworkConfigList) *libcni.NetworkConfigList { + plugins := make([]*libcni.NetworkConfig, 0, len(conf.Plugins)) + for _, net := range conf.Plugins { + if net.Network.Type != "podman-machine" { + plugins = append(plugins, net) + } + } + conf.Plugins = plugins + return conf +} diff --git a/vendor/github.com/containers/common/libnetwork/cni/cni_exec.go b/vendor/github.com/containers/common/libnetwork/cni/cni_exec.go new file mode 100644 index 000000000..c66e7ef5d --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/cni/cni_exec.go @@ -0,0 +1,110 @@ +// Copyright 2016 CNI authors +// Copyright 2021 Podman authors +// +// This code has been originally copied from github.com/containernetworking/cni +// but has been changed to better fit the Podman use case. +// +// 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 +// +// https://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. + +// +build linux + +package cni + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "os/exec" + "path/filepath" + + "github.com/containernetworking/cni/pkg/invoke" + "github.com/containernetworking/cni/pkg/version" + "github.com/containers/storage/pkg/unshare" +) + +type cniExec struct { + version.PluginDecoder +} + +type cniPluginError struct { + plugin string + Code uint `json:"code"` + Msg string `json:"msg"` + Details string `json:"details,omitempty"` +} + +// Error returns a nicely formatted error message for the cni plugin errors. +func (e *cniPluginError) Error() string { + err := fmt.Sprintf("cni plugin %s failed", e.plugin) + if e.Msg != "" { + err = fmt.Sprintf("%s: %s", err, e.Msg) + } else if e.Code > 0 { + err = fmt.Sprintf("%s with error code %d", err, e.Code) + } + if e.Details != "" { + err = fmt.Sprintf("%s: %s", err, e.Details) + } + return err +} + +// ExecPlugin execute the cni plugin. Returns the stdout of the plugin or an error. +func (e *cniExec) ExecPlugin(ctx context.Context, pluginPath string, stdinData []byte, environ []string) ([]byte, error) { + stdout := &bytes.Buffer{} + stderr := &bytes.Buffer{} + c := exec.CommandContext(ctx, pluginPath) + c.Env = environ + c.Stdin = bytes.NewBuffer(stdinData) + c.Stdout = stdout + c.Stderr = stderr + + // The dnsname plugin tries to use XDG_RUNTIME_DIR to store files. + // podman run will have XDG_RUNTIME_DIR set and thus the cni plugin can use + // it. The problem is that XDG_RUNTIME_DIR is unset for the conmon process + // for rootful users. This causes issues since the cleanup process is spawned + // by conmon and thus not have XDG_RUNTIME_DIR set to same value as podman run. + // Because of it dnsname will not find the config files and cannot correctly cleanup. + // To fix this we should also unset XDG_RUNTIME_DIR for the cni plugins as rootful. + if !unshare.IsRootless() { + c.Env = append(c.Env, "XDG_RUNTIME_DIR=") + } + + err := c.Run() + if err != nil { + return nil, annotatePluginError(err, pluginPath, stdout.Bytes(), stderr.Bytes()) + } + return stdout.Bytes(), nil +} + +// annotatePluginError parses the common cni plugin error json. +func annotatePluginError(err error, plugin string, stdout, stderr []byte) error { + pluginName := filepath.Base(plugin) + emsg := cniPluginError{ + plugin: pluginName, + } + if len(stdout) == 0 { + if len(stderr) == 0 { + emsg.Msg = err.Error() + } else { + emsg.Msg = string(stderr) + } + } else if perr := json.Unmarshal(stdout, &emsg); perr != nil { + emsg.Msg = fmt.Sprintf("failed to unmarshal error message %q: %v", string(stdout), perr) + } + return &emsg +} + +// FindInPath finds the plugin in the given paths. +func (e *cniExec) FindInPath(plugin string, paths []string) (string, error) { + return invoke.FindInPath(plugin, paths) +} diff --git a/vendor/github.com/containers/common/libnetwork/cni/cni_types.go b/vendor/github.com/containers/common/libnetwork/cni/cni_types.go new file mode 100644 index 000000000..fbfcd49ad --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/cni/cni_types.go @@ -0,0 +1,281 @@ +// +build linux + +package cni + +import ( + "net" + "os" + "path/filepath" + + "github.com/containers/common/libnetwork/types" +) + +const ( + defaultIPv4Route = "0.0.0.0/0" + defaultIPv6Route = "::/0" + // defaultPodmanDomainName is used for the dnsname plugin to define + // a localized domain name for a created network + defaultPodmanDomainName = "dns.podman" + + // cniDeviceName is the default name for a new bridge, it should be suffixed with an integer + cniDeviceName = "cni-podman" + + // podmanLabelKey key used to store the podman network label in a cni config + podmanLabelKey = "podman_labels" + + // podmanOptionsKey key used to store the podman network options in a cni config + podmanOptionsKey = "podman_options" +) + +// cniPortMapEntry struct is used by the portmap plugin +// https://github.com/containernetworking/plugins/blob/649e0181fe7b3a61e708f3e4249a798f57f25cc5/plugins/meta/portmap/main.go#L43-L50 +type cniPortMapEntry struct { + HostPort int `json:"hostPort"` + ContainerPort int `json:"containerPort"` + Protocol string `json:"protocol"` + HostIP string `json:"hostIP,omitempty"` +} + +// hostLocalBridge describes a configuration for a bridge plugin +// https://github.com/containernetworking/plugins/tree/master/plugins/main/bridge#network-configuration-reference +type hostLocalBridge struct { + PluginType string `json:"type"` + BrName string `json:"bridge,omitempty"` + IsGW bool `json:"isGateway"` + IsDefaultGW bool `json:"isDefaultGateway,omitempty"` + ForceAddress bool `json:"forceAddress,omitempty"` + IPMasq bool `json:"ipMasq,omitempty"` + MTU int `json:"mtu,omitempty"` + HairpinMode bool `json:"hairpinMode,omitempty"` + PromiscMode bool `json:"promiscMode,omitempty"` + Vlan int `json:"vlan,omitempty"` + IPAM ipamConfig `json:"ipam"` + Capabilities map[string]bool `json:"capabilities,omitempty"` +} + +// ipamConfig describes an IPAM configuration +// https://github.com/containernetworking/plugins/tree/master/plugins/ipam/host-local#network-configuration-reference +type ipamConfig struct { + PluginType string `json:"type"` + Routes []ipamRoute `json:"routes,omitempty"` + ResolveConf string `json:"resolveConf,omitempty"` + DataDir string `json:"dataDir,omitempty"` + Ranges [][]ipamLocalHostRangeConf `json:"ranges,omitempty"` +} + +// ipamLocalHostRangeConf describes the new style IPAM ranges +type ipamLocalHostRangeConf struct { + Subnet string `json:"subnet"` + RangeStart string `json:"rangeStart,omitempty"` + RangeEnd string `json:"rangeEnd,omitempty"` + Gateway string `json:"gateway,omitempty"` +} + +// ipamRoute describes a route in an ipam config +type ipamRoute struct { + Dest string `json:"dst"` +} + +// portMapConfig describes the default portmapping config +type portMapConfig struct { + PluginType string `json:"type"` + Capabilities map[string]bool `json:"capabilities"` +} + +// VLANConfig describes the macvlan config +type VLANConfig struct { + PluginType string `json:"type"` + Master string `json:"master"` + IPAM ipamConfig `json:"ipam"` + MTU int `json:"mtu,omitempty"` + Mode string `json:"mode,omitempty"` + Capabilities map[string]bool `json:"capabilities,omitempty"` +} + +// firewallConfig describes the firewall plugin +type firewallConfig struct { + PluginType string `json:"type"` + Backend string `json:"backend"` +} + +// tuningConfig describes the tuning plugin +type tuningConfig struct { + PluginType string `json:"type"` +} + +// dnsNameConfig describes the dns container name resolution plugin config +type dnsNameConfig struct { + PluginType string `json:"type"` + DomainName string `json:"domainName"` + Capabilities map[string]bool `json:"capabilities"` +} + +// ncList describes a generic map +type ncList map[string]interface{} + +// newNcList creates a generic map of values with string +// keys and adds in version and network name +func newNcList(name, version string, labels, options map[string]string) ncList { + n := ncList{} + n["cniVersion"] = version + n["name"] = name + args := map[string]map[string]string{} + if len(labels) > 0 { + args[podmanLabelKey] = labels + } + if len(options) > 0 { + args[podmanOptionsKey] = options + } + if len(args) > 0 { + n["args"] = args + } + return n +} + +// newHostLocalBridge creates a new LocalBridge for host-local +func newHostLocalBridge(name string, isGateWay, ipMasq bool, mtu, vlan int, ipamConf *ipamConfig) *hostLocalBridge { + caps := make(map[string]bool) + caps["ips"] = true + bridge := hostLocalBridge{ + PluginType: "bridge", + BrName: name, + IsGW: isGateWay, + IPMasq: ipMasq, + MTU: mtu, + HairpinMode: true, + Vlan: vlan, + IPAM: *ipamConf, + } + // if we use host-local set the ips cap to ensure we can set static ips via runtime config + if ipamConf.PluginType == types.HostLocalIPAMDriver { + bridge.Capabilities = caps + } + return &bridge +} + +// newIPAMHostLocalConf creates a new IPAMHostLocal configuration +func newIPAMHostLocalConf(routes []ipamRoute, ipamRanges [][]ipamLocalHostRangeConf) ipamConfig { + ipamConf := ipamConfig{ + PluginType: "host-local", + Routes: routes, + } + + ipamConf.Ranges = ipamRanges + return ipamConf +} + +// newIPAMLocalHostRange create a new IPAM range +func newIPAMLocalHostRange(subnet types.IPNet, leaseRange *types.LeaseRange, gw net.IP) *ipamLocalHostRangeConf { + hostRange := &ipamLocalHostRangeConf{ + Subnet: subnet.String(), + } + + // a user provided a range, we add it here + if leaseRange != nil { + if leaseRange.StartIP != nil { + hostRange.RangeStart = leaseRange.StartIP.String() + } + if leaseRange.EndIP != nil { + hostRange.RangeEnd = leaseRange.EndIP.String() + } + } + + if gw != nil { + hostRange.Gateway = gw.String() + } + return hostRange +} + +// newIPAMRoute creates a new IPAM route configuration +// nolint:interfacer +func newIPAMRoute(r *net.IPNet) ipamRoute { + return ipamRoute{Dest: r.String()} +} + +// newIPAMDefaultRoute creates a new IPAMDefault route of +// 0.0.0.0/0 for IPv4 or ::/0 for IPv6 +func newIPAMDefaultRoute(isIPv6 bool) (ipamRoute, error) { + route := defaultIPv4Route + if isIPv6 { + route = defaultIPv6Route + } + _, n, err := net.ParseCIDR(route) + if err != nil { + return ipamRoute{}, err + } + return newIPAMRoute(n), nil +} + +// newPortMapPlugin creates a predefined, default portmapping +// configuration +func newPortMapPlugin() portMapConfig { + caps := make(map[string]bool) + caps["portMappings"] = true + p := portMapConfig{ + PluginType: "portmap", + Capabilities: caps, + } + return p +} + +// newFirewallPlugin creates a generic firewall plugin +func newFirewallPlugin() firewallConfig { + return firewallConfig{ + PluginType: "firewall", + } +} + +// newTuningPlugin creates a generic tuning section +func newTuningPlugin() tuningConfig { + return tuningConfig{ + PluginType: "tuning", + } +} + +// newDNSNamePlugin creates the dnsname config with a given +// domainname +func newDNSNamePlugin(domainName string) dnsNameConfig { + caps := make(map[string]bool, 1) + caps["aliases"] = true + return dnsNameConfig{ + PluginType: "dnsname", + DomainName: domainName, + Capabilities: caps, + } +} + +// hasDNSNamePlugin looks to see if the dnsname cni plugin is present +func hasDNSNamePlugin(paths []string) bool { + for _, p := range paths { + if _, err := os.Stat(filepath.Join(p, "dnsname")); err == nil { + return true + } + } + return false +} + +// newVLANPlugin creates a macvlanconfig with a given device name +func newVLANPlugin(pluginType, device, mode string, mtu int, ipam *ipamConfig) VLANConfig { + m := VLANConfig{ + PluginType: pluginType, + IPAM: *ipam, + } + if mtu > 0 { + m.MTU = mtu + } + if len(mode) > 0 { + m.Mode = mode + } + // CNI is supposed to use the default route if a + // parent device is not provided + if len(device) > 0 { + m.Master = device + } + caps := make(map[string]bool) + caps["ips"] = true + // if we use host-local set the ips cap to ensure we can set static ips via runtime config + if ipam.PluginType == types.HostLocalIPAMDriver { + m.Capabilities = caps + } + return m +} diff --git a/vendor/github.com/containers/common/libnetwork/cni/config.go b/vendor/github.com/containers/common/libnetwork/cni/config.go new file mode 100644 index 000000000..e34daa3c5 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/cni/config.go @@ -0,0 +1,208 @@ +// +build linux + +package cni + +import ( + "net" + "os" + + internalutil "github.com/containers/common/libnetwork/internal/util" + "github.com/containers/common/libnetwork/types" + pkgutil "github.com/containers/common/pkg/util" + "github.com/pkg/errors" + "github.com/sirupsen/logrus" + "github.com/vishvananda/netlink" +) + +// NetworkCreate will take a partial filled Network and fill the +// missing fields. It creates the Network and returns the full Network. +// nolint:gocritic +func (n *cniNetwork) NetworkCreate(net types.Network) (types.Network, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return types.Network{}, err + } + network, err := n.networkCreate(&net, false) + if err != nil { + return types.Network{}, err + } + // add the new network to the map + n.networks[network.libpodNet.Name] = network + return *network.libpodNet, nil +} + +// networkCreate will fill out the given network struct and return the new network entry. +// If defaultNet is true it will not validate against used subnets and it will not write the cni config to disk. +func (n *cniNetwork) networkCreate(newNetwork *types.Network, defaultNet bool) (*network, error) { + // if no driver is set use the default one + if newNetwork.Driver == "" { + newNetwork.Driver = types.DefaultNetworkDriver + } + + // FIXME: Should we use a different type for network create without the ID field? + // the caller is not allowed to set a specific ID + if newNetwork.ID != "" { + return nil, errors.Wrap(types.ErrInvalidArg, "ID can not be set for network create") + } + + err := internalutil.CommonNetworkCreate(n, newNetwork) + if err != nil { + return nil, err + } + + // Only get the used networks for validation if we do not create the default network. + // The default network should not be validated against used subnets, we have to ensure + // that this network can always be created even when a subnet is already used on the host. + // This could happen if you run a container on this net, then the cni interface will be + // created on the host and "block" this subnet from being used again. + // Therefore the next podman command tries to create the default net again and it would + // fail because it thinks the network is used on the host. + var usedNetworks []*net.IPNet + if !defaultNet { + usedNetworks, err = internalutil.GetUsedSubnets(n) + if err != nil { + return nil, err + } + } + + switch newNetwork.Driver { + case types.BridgeNetworkDriver: + err = internalutil.CreateBridge(n, newNetwork, usedNetworks) + if err != nil { + return nil, err + } + case types.MacVLANNetworkDriver, types.IPVLANNetworkDriver: + err = createIPMACVLAN(newNetwork) + if err != nil { + return nil, err + } + default: + return nil, errors.Wrapf(types.ErrInvalidArg, "unsupported driver %s", newNetwork.Driver) + } + + err = internalutil.ValidateSubnets(newNetwork, usedNetworks) + if err != nil { + return nil, err + } + + // generate the network ID + newNetwork.ID = getNetworkIDFromName(newNetwork.Name) + + // FIXME: Should this be a hard error? + if newNetwork.DNSEnabled && newNetwork.Internal && hasDNSNamePlugin(n.cniPluginDirs) { + logrus.Warnf("dnsname and internal networks are incompatible. dnsname plugin not configured for network %s", newNetwork.Name) + newNetwork.DNSEnabled = false + } + + cniConf, path, err := n.createCNIConfigListFromNetwork(newNetwork, !defaultNet) + if err != nil { + return nil, err + } + return &network{cniNet: cniConf, libpodNet: newNetwork, filename: path}, nil +} + +// NetworkRemove will remove the Network with the given name or ID. +// It does not ensure that the network is unused. +func (n *cniNetwork) NetworkRemove(nameOrID string) error { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return err + } + + network, err := n.getNetwork(nameOrID) + if err != nil { + return err + } + + // Removing the default network is not allowed. + if network.libpodNet.Name == n.defaultNetwork { + return errors.Errorf("default network %s cannot be removed", n.defaultNetwork) + } + + // Remove the bridge network interface on the host. + if network.libpodNet.Driver == types.BridgeNetworkDriver { + link, err := netlink.LinkByName(network.libpodNet.NetworkInterface) + if err == nil { + err = netlink.LinkDel(link) + // only log the error, it is not fatal + if err != nil { + logrus.Infof("Failed to remove network interface %s: %v", network.libpodNet.NetworkInterface, err) + } + } + } + + file := network.filename + delete(n.networks, network.libpodNet.Name) + + // make sure to not error for ErrNotExist + if err := os.Remove(file); err != nil && !errors.Is(err, os.ErrNotExist) { + return err + } + return nil +} + +// NetworkList will return all known Networks. Optionally you can +// supply a list of filter functions. Only if a network matches all +// functions it is returned. +func (n *cniNetwork) NetworkList(filters ...types.FilterFunc) ([]types.Network, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return nil, err + } + + networks := make([]types.Network, 0, len(n.networks)) +outer: + for _, net := range n.networks { + for _, filter := range filters { + // All filters have to match, if one does not match we can skip to the next network. + if !filter(*net.libpodNet) { + continue outer + } + } + networks = append(networks, *net.libpodNet) + } + return networks, nil +} + +// NetworkInspect will return the Network with the given name or ID. +func (n *cniNetwork) NetworkInspect(nameOrID string) (types.Network, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return types.Network{}, err + } + + network, err := n.getNetwork(nameOrID) + if err != nil { + return types.Network{}, err + } + return *network.libpodNet, nil +} + +func createIPMACVLAN(network *types.Network) error { + if network.Internal { + return errors.New("internal is not supported with macvlan") + } + if network.NetworkInterface != "" { + interfaceNames, err := internalutil.GetLiveNetworkNames() + if err != nil { + return err + } + if !pkgutil.StringInSlice(network.NetworkInterface, interfaceNames) { + return errors.Errorf("parent interface %s does not exist", network.NetworkInterface) + } + } + if len(network.Subnets) == 0 { + network.IPAMOptions["driver"] = types.DHCPIPAMDriver + } else { + network.IPAMOptions["driver"] = types.HostLocalIPAMDriver + } + return nil +} diff --git a/vendor/github.com/containers/common/libnetwork/cni/network.go b/vendor/github.com/containers/common/libnetwork/cni/network.go new file mode 100644 index 000000000..958227235 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/cni/network.go @@ -0,0 +1,275 @@ +// +build linux + +package cni + +import ( + "context" + "crypto/sha256" + "encoding/hex" + "os" + "path/filepath" + "strings" + "time" + + "github.com/containernetworking/cni/libcni" + "github.com/containers/common/libnetwork/types" + "github.com/containers/storage/pkg/lockfile" + "github.com/pkg/errors" + "github.com/sirupsen/logrus" +) + +type cniNetwork struct { + // cniConfigDir is directory where the cni config files are stored. + cniConfigDir string + // cniPluginDirs is a list of directories where cni should look for the plugins. + cniPluginDirs []string + + cniConf *libcni.CNIConfig + + // defaultNetwork is the name for the default network. + defaultNetwork string + // defaultSubnet is the default subnet for the default network. + defaultSubnet types.IPNet + + // isMachine describes whenever podman runs in a podman machine environment. + isMachine bool + + // lock is a internal lock for critical operations + lock lockfile.Locker + + // modTime is the timestamp when the config dir was modified + modTime time.Time + + // networks is a map with loaded networks, the key is the network name + networks map[string]*network +} + +type network struct { + // filename is the full path to the cni config file on disk + filename string + libpodNet *types.Network + cniNet *libcni.NetworkConfigList +} + +type InitConfig struct { + // CNIConfigDir is directory where the cni config files are stored. + CNIConfigDir string + // CNIPluginDirs is a list of directories where cni should look for the plugins. + CNIPluginDirs []string + + // DefaultNetwork is the name for the default network. + DefaultNetwork string + // DefaultSubnet is the default subnet for the default network. + DefaultSubnet string + + // IsMachine describes whenever podman runs in a podman machine environment. + IsMachine bool +} + +// NewCNINetworkInterface creates the ContainerNetwork interface for the CNI backend. +// Note: The networks are not loaded from disk until a method is called. +func NewCNINetworkInterface(conf *InitConfig) (types.ContainerNetwork, error) { + // TODO: consider using a shared memory lock + lock, err := lockfile.GetLockfile(filepath.Join(conf.CNIConfigDir, "cni.lock")) + if err != nil { + return nil, err + } + + defaultNetworkName := conf.DefaultNetwork + if defaultNetworkName == "" { + defaultNetworkName = types.DefaultNetworkName + } + + defaultSubnet := conf.DefaultSubnet + if defaultSubnet == "" { + defaultSubnet = types.DefaultSubnet + } + defaultNet, err := types.ParseCIDR(defaultSubnet) + if err != nil { + return nil, errors.Wrap(err, "failed to parse default subnet") + } + + cni := libcni.NewCNIConfig(conf.CNIPluginDirs, &cniExec{}) + n := &cniNetwork{ + cniConfigDir: conf.CNIConfigDir, + cniPluginDirs: conf.CNIPluginDirs, + cniConf: cni, + defaultNetwork: defaultNetworkName, + defaultSubnet: defaultNet, + isMachine: conf.IsMachine, + lock: lock, + } + + return n, nil +} + +// Drivers will return the list of supported network drivers +// for this interface. +func (n *cniNetwork) Drivers() []string { + return []string{types.BridgeNetworkDriver, types.MacVLANNetworkDriver, types.IPVLANNetworkDriver} +} + +// DefaultNetworkName will return the default cni network name. +func (n *cniNetwork) DefaultNetworkName() string { + return n.defaultNetwork +} + +func (n *cniNetwork) loadNetworks() error { + // check the mod time of the config dir + f, err := os.Stat(n.cniConfigDir) + if err != nil { + return err + } + modTime := f.ModTime() + + // skip loading networks if they are already loaded and + // if the config dir was not modified since the last call + if n.networks != nil && modTime.Equal(n.modTime) { + return nil + } + // make sure the remove all networks before we reload them + n.networks = nil + n.modTime = modTime + + // FIXME: do we have to support other file types as well, e.g. .conf? + files, err := libcni.ConfFiles(n.cniConfigDir, []string{".conflist"}) + if err != nil { + return err + } + networks := make(map[string]*network, len(files)) + for _, file := range files { + conf, err := libcni.ConfListFromFile(file) + if err != nil { + // do not log ENOENT errors + if !errors.Is(err, os.ErrNotExist) { + logrus.Warnf("Error loading CNI config file %s: %v", file, err) + } + continue + } + + if !types.NameRegex.MatchString(conf.Name) { + logrus.Warnf("CNI config list %s has invalid name, skipping: %v", file, types.RegexError) + continue + } + + // podman < v4.0 used the podman-machine cni plugin for podman machine port forwarding + // since this is now build into podman we no longer use the plugin + // old configs may still contain it so we just remove it here + if n.isMachine { + conf = removeMachinePlugin(conf) + } + + if _, err := n.cniConf.ValidateNetworkList(context.Background(), conf); err != nil { + logrus.Warnf("Error validating CNI config file %s: %v", file, err) + continue + } + + if val, ok := networks[conf.Name]; ok { + logrus.Warnf("CNI config list %s has the same network name as %s, skipping", file, val.filename) + continue + } + + net, err := createNetworkFromCNIConfigList(conf, file) + if err != nil { + logrus.Errorf("CNI config list %s could not be converted to a libpod config, skipping: %v", file, err) + continue + } + logrus.Debugf("Successfully loaded network %s: %v", net.Name, net) + networkInfo := network{ + filename: file, + cniNet: conf, + libpodNet: net, + } + networks[net.Name] = &networkInfo + } + + // create the default network in memory if it did not exists on disk + if networks[n.defaultNetwork] == nil { + networkInfo, err := n.createDefaultNetwork() + if err != nil { + return errors.Wrapf(err, "failed to create default network %s", n.defaultNetwork) + } + networks[n.defaultNetwork] = networkInfo + } + + logrus.Debugf("Successfully loaded %d networks", len(networks)) + n.networks = networks + return nil +} + +func (n *cniNetwork) createDefaultNetwork() (*network, error) { + net := types.Network{ + Name: n.defaultNetwork, + NetworkInterface: "cni-podman0", + Driver: types.BridgeNetworkDriver, + Subnets: []types.Subnet{ + {Subnet: n.defaultSubnet}, + }, + } + return n.networkCreate(&net, true) +} + +// getNetwork will lookup a network by name or ID. It returns an +// error when no network was found or when more than one network +// with the given (partial) ID exists. +// getNetwork will read from the networks map, therefore the caller +// must ensure that n.lock is locked before using it. +func (n *cniNetwork) getNetwork(nameOrID string) (*network, error) { + // fast path check the map key, this will only work for names + if val, ok := n.networks[nameOrID]; ok { + return val, nil + } + // If there was no match we might got a full or partial ID. + var net *network + for _, val := range n.networks { + // This should not happen because we already looked up the map by name but check anyway. + if val.libpodNet.Name == nameOrID { + return val, nil + } + + if strings.HasPrefix(val.libpodNet.ID, nameOrID) { + if net != nil { + return nil, errors.Errorf("more than one result for network ID %s", nameOrID) + } + net = val + } + } + if net != nil { + return net, nil + } + return nil, errors.Wrapf(types.ErrNoSuchNetwork, "unable to find network with name or ID %s", nameOrID) +} + +// getNetworkIDFromName creates a network ID from the name. It is just the +// sha256 hash so it is not safe but it should be safe enough for our use case. +func getNetworkIDFromName(name string) string { + hash := sha256.Sum256([]byte(name)) + return hex.EncodeToString(hash[:]) +} + +// Implement the NetUtil interface for easy code sharing with other network interfaces. + +// ForEach call the given function for each network +func (n *cniNetwork) ForEach(run func(types.Network)) { + for _, val := range n.networks { + run(*val.libpodNet) + } +} + +// Len return the number of networks +func (n *cniNetwork) Len() int { + return len(n.networks) +} + +// DefaultInterfaceName return the default cni bridge name, must be suffixed with a number. +func (n *cniNetwork) DefaultInterfaceName() string { + return cniDeviceName +} + +func (n *cniNetwork) Network(nameOrID string) (*types.Network, error) { + network, err := n.getNetwork(nameOrID) + if err != nil { + return nil, err + } + return network.libpodNet, err +} diff --git a/vendor/github.com/containers/common/libnetwork/cni/run.go b/vendor/github.com/containers/common/libnetwork/cni/run.go new file mode 100644 index 000000000..af05d9d9d --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/cni/run.go @@ -0,0 +1,274 @@ +// +build linux + +package cni + +import ( + "context" + "net" + "os" + "strings" + + "github.com/containernetworking/cni/libcni" + cnitypes "github.com/containernetworking/cni/pkg/types" + types040 "github.com/containernetworking/cni/pkg/types/040" + "github.com/containernetworking/plugins/pkg/ns" + "github.com/containers/common/libnetwork/internal/util" + "github.com/containers/common/libnetwork/types" + "github.com/hashicorp/go-multierror" + "github.com/pkg/errors" + "github.com/sirupsen/logrus" + "github.com/vishvananda/netlink" +) + +// Setup will setup the container network namespace. It returns +// a map of StatusBlocks, the key is the network name. +func (n *cniNetwork) Setup(namespacePath string, options types.SetupOptions) (map[string]types.StatusBlock, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return nil, err + } + + err = util.ValidateSetupOptions(n, namespacePath, options) + if err != nil { + return nil, err + } + + // set the loopback adapter up in the container netns + err = ns.WithNetNSPath(namespacePath, func(_ ns.NetNS) error { + link, err := netlink.LinkByName("lo") + if err == nil { + err = netlink.LinkSetUp(link) + } + return err + }) + if err != nil { + return nil, errors.Wrapf(err, "failed to set the loopback adapter up") + } + + var retErr error + teardownOpts := options + teardownOpts.Networks = map[string]types.PerNetworkOptions{} + // make sure to teardown the already connected networks on error + defer func() { + if retErr != nil { + if len(teardownOpts.Networks) > 0 { + err := n.teardown(namespacePath, types.TeardownOptions(teardownOpts)) + if err != nil { + logrus.Warn(err) + } + } + } + }() + + ports, err := convertSpecgenPortsToCNIPorts(options.PortMappings) + if err != nil { + return nil, err + } + + results := make(map[string]types.StatusBlock, len(options.Networks)) + for name, netOpts := range options.Networks { + netOpts := netOpts + network := n.networks[name] + rt := getRuntimeConfig(namespacePath, options.ContainerName, options.ContainerID, name, ports, &netOpts) + + // If we have more than one static ip we need parse the ips via runtime config, + // make sure to add the ips capability to the first plugin otherwise it doesn't get the ips + if len(netOpts.StaticIPs) > 0 && !network.cniNet.Plugins[0].Network.Capabilities["ips"] { + caps := make(map[string]interface{}) + caps["capabilities"] = map[string]bool{"ips": true} + network.cniNet.Plugins[0], retErr = libcni.InjectConf(network.cniNet.Plugins[0], caps) + if retErr != nil { + return nil, retErr + } + } + + var res cnitypes.Result + res, retErr = n.cniConf.AddNetworkList(context.Background(), network.cniNet, rt) + // Add this network to teardown opts since it is now connected. + // Also add this if an errors was returned since we want to call teardown on this regardless. + teardownOpts.Networks[name] = netOpts + if retErr != nil { + return nil, retErr + } + + logrus.Debugf("cni result for container %s network %s: %v", options.ContainerID, name, res) + var status types.StatusBlock + status, retErr = CNIResultToStatus(res) + if retErr != nil { + return nil, retErr + } + results[name] = status + } + return results, nil +} + +// CNIResultToStatus convert the cni result to status block +// nolint:golint +func CNIResultToStatus(res cnitypes.Result) (types.StatusBlock, error) { + result := types.StatusBlock{} + cniResult, err := types040.GetResult(res) + if err != nil { + return result, err + } + nameservers := make([]net.IP, 0, len(cniResult.DNS.Nameservers)) + for _, nameserver := range cniResult.DNS.Nameservers { + ip := net.ParseIP(nameserver) + if ip == nil { + return result, errors.Errorf("failed to parse cni nameserver ip %s", nameserver) + } + nameservers = append(nameservers, ip) + } + result.DNSServerIPs = nameservers + result.DNSSearchDomains = cniResult.DNS.Search + + interfaces := make(map[string]types.NetInterface) + for _, ip := range cniResult.IPs { + if ip.Interface == nil { + // we do no expect ips without an interface + continue + } + if len(cniResult.Interfaces) <= *ip.Interface { + return result, errors.Errorf("invalid cni result, interface index %d out of range", *ip.Interface) + } + cniInt := cniResult.Interfaces[*ip.Interface] + netInt, ok := interfaces[cniInt.Name] + if ok { + netInt.Subnets = append(netInt.Subnets, types.NetAddress{ + IPNet: types.IPNet{IPNet: ip.Address}, + Gateway: ip.Gateway, + }) + interfaces[cniInt.Name] = netInt + } else { + mac, err := net.ParseMAC(cniInt.Mac) + if err != nil { + return result, err + } + interfaces[cniInt.Name] = types.NetInterface{ + MacAddress: types.HardwareAddr(mac), + Subnets: []types.NetAddress{{ + IPNet: types.IPNet{IPNet: ip.Address}, + Gateway: ip.Gateway, + }}, + } + } + } + result.Interfaces = interfaces + return result, nil +} + +func getRuntimeConfig(netns, conName, conID, networkName string, ports []cniPortMapEntry, opts *types.PerNetworkOptions) *libcni.RuntimeConf { + rt := &libcni.RuntimeConf{ + ContainerID: conID, + NetNS: netns, + IfName: opts.InterfaceName, + Args: [][2]string{ + {"IgnoreUnknown", "1"}, + // Do not set the K8S env vars, see https://github.com/containers/podman/issues/12083. + // Only K8S_POD_NAME is used by dnsname to get the container name. + {"K8S_POD_NAME", conName}, + }, + CapabilityArgs: map[string]interface{}{}, + } + + // Propagate environment CNI_ARGS + for _, kvpairs := range strings.Split(os.Getenv("CNI_ARGS"), ";") { + if keyval := strings.SplitN(kvpairs, "=", 2); len(keyval) == 2 { + rt.Args = append(rt.Args, [2]string{keyval[0], keyval[1]}) + } + } + + // Add mac address to cni args + if len(opts.StaticMAC) > 0 { + rt.Args = append(rt.Args, [2]string{"MAC", opts.StaticMAC.String()}) + } + + if len(opts.StaticIPs) == 1 { + // Add a single IP to the args field. CNI plugins < 1.0.0 + // do not support multiple ips via capability args. + rt.Args = append(rt.Args, [2]string{"IP", opts.StaticIPs[0].String()}) + } else if len(opts.StaticIPs) > 1 { + // Set the static ips in the capability args + // to support more than one static ip per network. + rt.CapabilityArgs["ips"] = opts.StaticIPs + } + + // Set network aliases for the dnsname plugin. + if len(opts.Aliases) > 0 { + rt.CapabilityArgs["aliases"] = map[string][]string{ + networkName: opts.Aliases, + } + } + + // Set PortMappings in Capabilities + if len(ports) > 0 { + rt.CapabilityArgs["portMappings"] = ports + } + + return rt +} + +// Teardown will teardown the container network namespace. +func (n *cniNetwork) Teardown(namespacePath string, options types.TeardownOptions) error { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return err + } + return n.teardown(namespacePath, options) +} + +func (n *cniNetwork) teardown(namespacePath string, options types.TeardownOptions) error { + // Note: An empty namespacePath is allowed because some plugins + // still need teardown, for example ipam should remove used ip allocations. + + ports, err := convertSpecgenPortsToCNIPorts(options.PortMappings) + if err != nil { + return err + } + + var multiErr *multierror.Error + for name, netOpts := range options.Networks { + netOpts := netOpts + rt := getRuntimeConfig(namespacePath, options.ContainerName, options.ContainerID, name, ports, &netOpts) + + cniConfList, newRt, err := getCachedNetworkConfig(n.cniConf, name, rt) + if err == nil { + rt = newRt + } else { + logrus.Warnf("Failed to load cached network config: %v, falling back to loading network %s from disk", err, name) + network := n.networks[name] + if network == nil { + multiErr = multierror.Append(multiErr, errors.Wrapf(types.ErrNoSuchNetwork, "network %s", name)) + continue + } + cniConfList = network.cniNet + } + + err = n.cniConf.DelNetworkList(context.Background(), cniConfList, rt) + if err != nil { + multiErr = multierror.Append(multiErr, err) + } + } + return multiErr.ErrorOrNil() +} + +func getCachedNetworkConfig(cniConf *libcni.CNIConfig, name string, rt *libcni.RuntimeConf) (*libcni.NetworkConfigList, *libcni.RuntimeConf, error) { + cniConfList := &libcni.NetworkConfigList{ + Name: name, + } + confBytes, rt, err := cniConf.GetNetworkListCachedConfig(cniConfList, rt) + if err != nil { + return nil, nil, err + } else if confBytes == nil { + return nil, nil, errors.Errorf("network %s not found in CNI cache", name) + } + + cniConfList, err = libcni.ConfListFromBytes(confBytes) + if err != nil { + return nil, nil, err + } + return cniConfList, rt, nil +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/bridge.go b/vendor/github.com/containers/common/libnetwork/internal/util/bridge.go new file mode 100644 index 000000000..27ad0a4fb --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/bridge.go @@ -0,0 +1,68 @@ +package util + +import ( + "net" + + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/libnetwork/util" + pkgutil "github.com/containers/common/pkg/util" + "github.com/pkg/errors" +) + +func CreateBridge(n NetUtil, network *types.Network, usedNetworks []*net.IPNet) error { + if network.NetworkInterface != "" { + bridges := GetBridgeInterfaceNames(n) + if pkgutil.StringInSlice(network.NetworkInterface, bridges) { + return errors.Errorf("bridge name %s already in use", network.NetworkInterface) + } + if !types.NameRegex.MatchString(network.NetworkInterface) { + return errors.Wrapf(types.RegexError, "bridge name %s invalid", network.NetworkInterface) + } + } else { + var err error + network.NetworkInterface, err = GetFreeDeviceName(n) + if err != nil { + return err + } + } + + if network.IPAMOptions["driver"] != types.DHCPIPAMDriver { + if len(network.Subnets) == 0 { + freeSubnet, err := GetFreeIPv4NetworkSubnet(usedNetworks) + if err != nil { + return err + } + network.Subnets = append(network.Subnets, *freeSubnet) + } + // ipv6 enabled means dual stack, check if we already have + // a ipv4 or ipv6 subnet and add one if not. + if network.IPv6Enabled { + ipv4 := false + ipv6 := false + for _, subnet := range network.Subnets { + if util.IsIPv6(subnet.Subnet.IP) { + ipv6 = true + } + if util.IsIPv4(subnet.Subnet.IP) { + ipv4 = true + } + } + if !ipv4 { + freeSubnet, err := GetFreeIPv4NetworkSubnet(usedNetworks) + if err != nil { + return err + } + network.Subnets = append(network.Subnets, *freeSubnet) + } + if !ipv6 { + freeSubnet, err := GetFreeIPv6NetworkSubnet(usedNetworks) + if err != nil { + return err + } + network.Subnets = append(network.Subnets, *freeSubnet) + } + } + network.IPAMOptions["driver"] = types.HostLocalIPAMDriver + } + return nil +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/create.go b/vendor/github.com/containers/common/libnetwork/internal/util/create.go new file mode 100644 index 000000000..ccb0f001a --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/create.go @@ -0,0 +1,41 @@ +package util + +import ( + "github.com/containers/common/libnetwork/types" + "github.com/pkg/errors" +) + +func CommonNetworkCreate(n NetUtil, network *types.Network) error { + if network.Labels == nil { + network.Labels = map[string]string{} + } + if network.Options == nil { + network.Options = map[string]string{} + } + if network.IPAMOptions == nil { + network.IPAMOptions = map[string]string{} + } + + var name string + var err error + // validate the name when given + if network.Name != "" { + if !types.NameRegex.MatchString(network.Name) { + return errors.Wrapf(types.RegexError, "network name %s invalid", network.Name) + } + if _, err := n.Network(network.Name); err == nil { + return errors.Wrapf(types.ErrNetworkExists, "network name %s already used", network.Name) + } + } else { + name, err = GetFreeDeviceName(n) + if err != nil { + return err + } + network.Name = name + // also use the name as interface name when we create a bridge network + if network.Driver == types.BridgeNetworkDriver && network.NetworkInterface == "" { + network.NetworkInterface = name + } + } + return nil +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/interface.go b/vendor/github.com/containers/common/libnetwork/internal/util/interface.go new file mode 100644 index 000000000..650fcb193 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/interface.go @@ -0,0 +1,19 @@ +package util + +import "github.com/containers/common/libnetwork/types" + +// This is a helper package to allow code sharing between the different +// network interfaces. + +// NetUtil is a helper interface which all network interfaces should implement to allow easy code sharing +type NetUtil interface { + // ForEach eaxecutes the given function for each network + ForEach(func(types.Network)) + // Len returns the number of networks + Len() int + // DefaultInterfaceName return the default interface name, this will be suffixed by a number + DefaultInterfaceName() string + // Network returns the network with the given name or ID. + // It returns an error if the network is not found + Network(nameOrID string) (*types.Network, error) +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/interfaces.go b/vendor/github.com/containers/common/libnetwork/internal/util/interfaces.go new file mode 100644 index 000000000..20819f756 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/interfaces.go @@ -0,0 +1,34 @@ +package util + +import "net" + +// getLiveNetworkSubnets returns a slice of subnets representing what the system +// has defined as network interfaces +func getLiveNetworkSubnets() ([]*net.IPNet, error) { + addrs, err := net.InterfaceAddrs() + if err != nil { + return nil, err + } + nets := make([]*net.IPNet, 0, len(addrs)) + for _, address := range addrs { + _, n, err := net.ParseCIDR(address.String()) + if err != nil { + return nil, err + } + nets = append(nets, n) + } + return nets, nil +} + +// GetLiveNetworkNames returns a list of network interface names on the system +func GetLiveNetworkNames() ([]string, error) { + liveInterfaces, err := net.Interfaces() + if err != nil { + return nil, err + } + interfaceNames := make([]string, 0, len(liveInterfaces)) + for _, i := range liveInterfaces { + interfaceNames = append(interfaceNames, i.Name) + } + return interfaceNames, nil +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/ip.go b/vendor/github.com/containers/common/libnetwork/internal/util/ip.go new file mode 100644 index 000000000..8f00a2a55 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/ip.go @@ -0,0 +1,70 @@ +package util + +import ( + "crypto/rand" + "net" + + "github.com/pkg/errors" +) + +func incByte(subnet *net.IPNet, idx int, shift uint) error { + if idx < 0 { + return errors.New("no more subnets left") + } + if subnet.IP[idx] == 255 { + subnet.IP[idx] = 0 + return incByte(subnet, idx-1, 0) + } + subnet.IP[idx] += 1 << shift + return nil +} + +// NextSubnet returns subnet incremented by 1 +func NextSubnet(subnet *net.IPNet) (*net.IPNet, error) { + newSubnet := &net.IPNet{ + IP: subnet.IP, + Mask: subnet.Mask, + } + ones, bits := newSubnet.Mask.Size() + if ones == 0 { + return nil, errors.Errorf("%s has only one subnet", subnet.String()) + } + zeroes := uint(bits - ones) + shift := zeroes % 8 + idx := ones/8 - 1 + if idx < 0 { + idx = 0 + } + if err := incByte(newSubnet, idx, shift); err != nil { + return nil, err + } + return newSubnet, nil +} + +func NetworkIntersectsWithNetworks(n *net.IPNet, networklist []*net.IPNet) bool { + for _, nw := range networklist { + if networkIntersect(n, nw) { + return true + } + } + return false +} + +func networkIntersect(n1, n2 *net.IPNet) bool { + return n2.Contains(n1.IP) || n1.Contains(n2.IP) +} + +// getRandomIPv6Subnet returns a random internal ipv6 subnet as described in RFC3879. +func getRandomIPv6Subnet() (net.IPNet, error) { + ip := make(net.IP, 8, net.IPv6len) + // read 8 random bytes + _, err := rand.Read(ip) + if err != nil { + return net.IPNet{}, err + } + // first byte must be FD as per RFC3879 + ip[0] = 0xfd + // add 8 zero bytes + ip = append(ip, make([]byte, 8)...) + return net.IPNet{IP: ip, Mask: net.CIDRMask(64, 128)}, nil +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/parse.go b/vendor/github.com/containers/common/libnetwork/internal/util/parse.go new file mode 100644 index 000000000..1f68df0bb --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/parse.go @@ -0,0 +1,37 @@ +package util + +import ( + "strconv" + + "github.com/pkg/errors" +) + +// ParseMTU parses the mtu option +func ParseMTU(mtu string) (int, error) { + if mtu == "" { + return 0, nil // default + } + m, err := strconv.Atoi(mtu) + if err != nil { + return 0, err + } + if m < 0 { + return 0, errors.Errorf("mtu %d is less than zero", m) + } + return m, nil +} + +// ParseVlan parses the vlan option +func ParseVlan(vlan string) (int, error) { + if vlan == "" { + return 0, nil // default + } + v, err := strconv.Atoi(vlan) + if err != nil { + return 0, err + } + if v < 0 || v > 4094 { + return 0, errors.Errorf("vlan ID %d must be between 0 and 4094", v) + } + return v, nil +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/util.go b/vendor/github.com/containers/common/libnetwork/internal/util/util.go new file mode 100644 index 000000000..8138d9fbc --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/util.go @@ -0,0 +1,123 @@ +package util + +import ( + "errors" + "fmt" + "net" + + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/pkg/util" + "github.com/sirupsen/logrus" +) + +// GetBridgeInterfaceNames returns all bridge interface names +// already used by network configs +func GetBridgeInterfaceNames(n NetUtil) []string { + names := make([]string, 0, n.Len()) + n.ForEach(func(net types.Network) { + if net.Driver == types.BridgeNetworkDriver { + names = append(names, net.NetworkInterface) + } + }) + return names +} + +// GetUsedNetworkNames returns all network names already used +// by network configs +func GetUsedNetworkNames(n NetUtil) []string { + names := make([]string, 0, n.Len()) + n.ForEach(func(net types.Network) { + if net.Driver == types.BridgeNetworkDriver { + names = append(names, net.NetworkInterface) + } + }) + return names +} + +// GetFreeDeviceName returns a free device name which can +// be used for new configs as name and bridge interface name. +// The base name is suffixed by a number +func GetFreeDeviceName(n NetUtil) (string, error) { + bridgeNames := GetBridgeInterfaceNames(n) + netNames := GetUsedNetworkNames(n) + liveInterfaces, err := GetLiveNetworkNames() + if err != nil { + return "", nil + } + names := make([]string, 0, len(bridgeNames)+len(netNames)+len(liveInterfaces)) + names = append(names, bridgeNames...) + names = append(names, netNames...) + names = append(names, liveInterfaces...) + // FIXME: Is a limit fine? + // Start by 1, 0 is reserved for the default network + for i := 1; i < 1000000; i++ { + deviceName := fmt.Sprintf("%s%d", n.DefaultInterfaceName(), i) + if !util.StringInSlice(deviceName, names) { + logrus.Debugf("found free device name %s", deviceName) + return deviceName, nil + } + } + return "", errors.New("could not find free device name, to many iterations") +} + +// GetUsedSubnets returns a list of all used subnets by network +// configs and interfaces on the host. +func GetUsedSubnets(n NetUtil) ([]*net.IPNet, error) { + // first, load all used subnets from network configs + subnets := make([]*net.IPNet, 0, n.Len()) + n.ForEach(func(n types.Network) { + for i := range n.Subnets { + subnets = append(subnets, &n.Subnets[i].Subnet.IPNet) + } + }) + // second, load networks from the current system + liveSubnets, err := getLiveNetworkSubnets() + if err != nil { + return nil, err + } + return append(subnets, liveSubnets...), nil +} + +// GetFreeIPv4NetworkSubnet returns a unused ipv4 subnet +func GetFreeIPv4NetworkSubnet(usedNetworks []*net.IPNet) (*types.Subnet, error) { + // the default podman network is 10.88.0.0/16 + // start locking for free /24 networks + network := &net.IPNet{ + IP: net.IP{10, 89, 0, 0}, + Mask: net.IPMask{255, 255, 255, 0}, + } + + // TODO: make sure to not use public subnets + for { + if intersectsConfig := NetworkIntersectsWithNetworks(network, usedNetworks); !intersectsConfig { + logrus.Debugf("found free ipv4 network subnet %s", network.String()) + return &types.Subnet{ + Subnet: types.IPNet{IPNet: *network}, + }, nil + } + var err error + network, err = NextSubnet(network) + if err != nil { + return nil, err + } + } +} + +// GetFreeIPv6NetworkSubnet returns a unused ipv6 subnet +func GetFreeIPv6NetworkSubnet(usedNetworks []*net.IPNet) (*types.Subnet, error) { + // FIXME: Is 10000 fine as limit? We should prevent an endless loop. + for i := 0; i < 10000; i++ { + // RFC4193: Choose the ipv6 subnet random and NOT sequentially. + network, err := getRandomIPv6Subnet() + if err != nil { + return nil, err + } + if intersectsConfig := NetworkIntersectsWithNetworks(&network, usedNetworks); !intersectsConfig { + logrus.Debugf("found free ipv6 network subnet %s", network.String()) + return &types.Subnet{ + Subnet: types.IPNet{IPNet: network}, + }, nil + } + } + return nil, errors.New("failed to get random ipv6 subnet") +} diff --git a/vendor/github.com/containers/common/libnetwork/internal/util/validate.go b/vendor/github.com/containers/common/libnetwork/internal/util/validate.go new file mode 100644 index 000000000..bfc5e2247 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/internal/util/validate.go @@ -0,0 +1,124 @@ +package util + +import ( + "net" + + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/libnetwork/util" + "github.com/pkg/errors" +) + +// ValidateSubnet will validate a given Subnet. It checks if the +// given gateway and lease range are part of this subnet. If the +// gateway is empty and addGateway is true it will get the first +// available ip in the subnet assigned. +func ValidateSubnet(s *types.Subnet, addGateway bool, usedNetworks []*net.IPNet) error { + if s == nil { + return errors.New("subnet is nil") + } + if s.Subnet.IP == nil { + return errors.New("subnet ip is nil") + } + + // Reparse to ensure subnet is valid. + // Do not use types.ParseCIDR() because we want the ip to be + // the network address and not a random ip in the subnet. + _, n, err := net.ParseCIDR(s.Subnet.String()) + if err != nil { + return errors.Wrap(err, "subnet invalid") + } + + // check that the new subnet does not conflict with existing ones + if NetworkIntersectsWithNetworks(n, usedNetworks) { + return errors.Errorf("subnet %s is already used on the host or by another config", n.String()) + } + + s.Subnet = types.IPNet{IPNet: *n} + if s.Gateway != nil { + if !s.Subnet.Contains(s.Gateway) { + return errors.Errorf("gateway %s not in subnet %s", s.Gateway, &s.Subnet) + } + util.NormalizeIP(&s.Gateway) + } else if addGateway { + ip, err := util.FirstIPInSubnet(n) + if err != nil { + return err + } + s.Gateway = ip + } + + if s.LeaseRange != nil { + if s.LeaseRange.StartIP != nil { + if !s.Subnet.Contains(s.LeaseRange.StartIP) { + return errors.Errorf("lease range start ip %s not in subnet %s", s.LeaseRange.StartIP, &s.Subnet) + } + util.NormalizeIP(&s.LeaseRange.StartIP) + } + if s.LeaseRange.EndIP != nil { + if !s.Subnet.Contains(s.LeaseRange.EndIP) { + return errors.Errorf("lease range end ip %s not in subnet %s", s.LeaseRange.EndIP, &s.Subnet) + } + util.NormalizeIP(&s.LeaseRange.EndIP) + } + } + return nil +} + +// ValidateSubnets will validate the subnets for this network. +// It also sets the gateway if the gateway is empty and it sets +// IPv6Enabled to true if at least one subnet is ipv6. +func ValidateSubnets(network *types.Network, usedNetworks []*net.IPNet) error { + for i := range network.Subnets { + err := ValidateSubnet(&network.Subnets[i], !network.Internal, usedNetworks) + if err != nil { + return err + } + if util.IsIPv6(network.Subnets[i].Subnet.IP) { + network.IPv6Enabled = true + } + } + return nil +} + +func ValidateSetupOptions(n NetUtil, namespacePath string, options types.SetupOptions) error { + if namespacePath == "" { + return errors.New("namespacePath is empty") + } + if options.ContainerID == "" { + return errors.New("ContainerID is empty") + } + if len(options.Networks) == 0 { + return errors.New("must specify at least one network") + } + for name, netOpts := range options.Networks { + netOpts := netOpts + network, err := n.Network(name) + if err != nil { + return err + } + err = validatePerNetworkOpts(network, &netOpts) + if err != nil { + return err + } + } + return nil +} + +// validatePerNetworkOpts checks that all given static ips are in a subnet on this network +func validatePerNetworkOpts(network *types.Network, netOpts *types.PerNetworkOptions) error { + if netOpts.InterfaceName == "" { + return errors.Errorf("interface name on network %s is empty", network.Name) + } + if network.IPAMOptions["driver"] == types.HostLocalIPAMDriver { + outer: + for _, ip := range netOpts.StaticIPs { + for _, s := range network.Subnets { + if s.Subnet.Contains(ip) { + continue outer + } + } + return errors.Errorf("requested static ip %s not in any subnet on network %s", ip.String(), network.Name) + } + } + return nil +} diff --git a/vendor/github.com/containers/common/libnetwork/netavark/config.go b/vendor/github.com/containers/common/libnetwork/netavark/config.go new file mode 100644 index 000000000..6d2daf299 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/netavark/config.go @@ -0,0 +1,252 @@ +// +build linux + +package netavark + +import ( + "encoding/json" + "net" + "os" + "path/filepath" + "time" + + internalutil "github.com/containers/common/libnetwork/internal/util" + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/pkg/util" + "github.com/containers/storage/pkg/stringid" + "github.com/pkg/errors" +) + +// NetworkCreate will take a partial filled Network and fill the +// missing fields. It creates the Network and returns the full Network. +// nolint:gocritic +func (n *netavarkNetwork) NetworkCreate(net types.Network) (types.Network, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return types.Network{}, err + } + network, err := n.networkCreate(&net, false) + if err != nil { + return types.Network{}, err + } + // add the new network to the map + n.networks[network.Name] = network + return *network, nil +} + +func (n *netavarkNetwork) networkCreate(newNetwork *types.Network, defaultNet bool) (*types.Network, error) { + // if no driver is set use the default one + if newNetwork.Driver == "" { + newNetwork.Driver = types.DefaultNetworkDriver + } + if !defaultNet { + // FIXME: Should we use a different type for network create without the ID field? + // the caller is not allowed to set a specific ID + if newNetwork.ID != "" { + return nil, errors.Wrap(types.ErrInvalidArg, "ID can not be set for network create") + } + + // generate random network ID + var i int + for i = 0; i < 1000; i++ { + id := stringid.GenerateNonCryptoID() + if _, err := n.getNetwork(id); err != nil { + newNetwork.ID = id + break + } + } + if i == 1000 { + return nil, errors.New("failed to create random network ID") + } + } + + err := internalutil.CommonNetworkCreate(n, newNetwork) + if err != nil { + return nil, err + } + + // Only get the used networks for validation if we do not create the default network. + // The default network should not be validated against used subnets, we have to ensure + // that this network can always be created even when a subnet is already used on the host. + // This could happen if you run a container on this net, then the cni interface will be + // created on the host and "block" this subnet from being used again. + // Therefore the next podman command tries to create the default net again and it would + // fail because it thinks the network is used on the host. + var usedNetworks []*net.IPNet + if !defaultNet { + usedNetworks, err = internalutil.GetUsedSubnets(n) + if err != nil { + return nil, err + } + } + + switch newNetwork.Driver { + case types.BridgeNetworkDriver: + err = internalutil.CreateBridge(n, newNetwork, usedNetworks) + if err != nil { + return nil, err + } + // validate the given options, we do not need them but just check to make sure they are valid + for key, value := range newNetwork.Options { + switch key { + case "mtu": + _, err = internalutil.ParseMTU(value) + if err != nil { + return nil, err + } + + case "vlan": + _, err = internalutil.ParseVlan(value) + if err != nil { + return nil, err + } + + default: + return nil, errors.Errorf("unsupported bridge network option %s", key) + } + } + case types.MacVLANNetworkDriver: + err = createMacvlan(newNetwork) + if err != nil { + return nil, err + } + default: + return nil, errors.Wrapf(types.ErrInvalidArg, "unsupported driver %s", newNetwork.Driver) + } + + err = internalutil.ValidateSubnets(newNetwork, usedNetworks) + if err != nil { + return nil, err + } + + // FIXME: If we have a working solution for internal networks with dns this check should be removed. + if newNetwork.DNSEnabled && newNetwork.Internal { + return nil, errors.New("cannot set internal and dns enabled") + } + + newNetwork.Created = time.Now() + + if !defaultNet { + confPath := filepath.Join(n.networkConfigDir, newNetwork.Name+".json") + f, err := os.Create(confPath) + if err != nil { + return nil, err + } + enc := json.NewEncoder(f) + enc.SetIndent("", " ") + err = enc.Encode(newNetwork) + if err != nil { + return nil, err + } + } + + return newNetwork, nil +} + +func createMacvlan(network *types.Network) error { + if network.Internal { + return errors.New("internal is not supported with macvlan") + } + if network.NetworkInterface != "" { + interfaceNames, err := internalutil.GetLiveNetworkNames() + if err != nil { + return err + } + if !util.StringInSlice(network.NetworkInterface, interfaceNames) { + return errors.Errorf("parent interface %s does not exist", network.NetworkInterface) + } + } + if len(network.Subnets) == 0 { + return errors.Errorf("macvlan driver needs at least one subnet specified, DHCP is not supported with netavark") + } + network.IPAMOptions["driver"] = types.HostLocalIPAMDriver + + // validate the given options, we do not need them but just check to make sure they are valid + for key, value := range network.Options { + switch key { + case "mode": + if !util.StringInSlice(value, types.ValidMacVLANModes) { + return errors.Errorf("unknown macvlan mode %q", value) + } + case "mtu": + _, err := internalutil.ParseMTU(value) + if err != nil { + return err + } + default: + return errors.Errorf("unsupported macvlan network option %s", key) + } + } + return nil +} + +// NetworkRemove will remove the Network with the given name or ID. +// It does not ensure that the network is unused. +func (n *netavarkNetwork) NetworkRemove(nameOrID string) error { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return err + } + + network, err := n.getNetwork(nameOrID) + if err != nil { + return err + } + + // Removing the default network is not allowed. + if network.Name == n.defaultNetwork { + return errors.Errorf("default network %s cannot be removed", n.defaultNetwork) + } + + file := filepath.Join(n.networkConfigDir, network.Name+".json") + // make sure to not error for ErrNotExist + if err := os.Remove(file); err != nil && !errors.Is(err, os.ErrNotExist) { + return err + } + delete(n.networks, network.Name) + return nil +} + +// NetworkList will return all known Networks. Optionally you can +// supply a list of filter functions. Only if a network matches all +// functions it is returned. +func (n *netavarkNetwork) NetworkList(filters ...types.FilterFunc) ([]types.Network, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return nil, err + } + + networks := make([]types.Network, 0, len(n.networks)) +outer: + for _, net := range n.networks { + for _, filter := range filters { + // All filters have to match, if one does not match we can skip to the next network. + if !filter(*net) { + continue outer + } + } + networks = append(networks, *net) + } + return networks, nil +} + +// NetworkInspect will return the Network with the given name or ID. +func (n *netavarkNetwork) NetworkInspect(nameOrID string) (types.Network, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return types.Network{}, err + } + + network, err := n.getNetwork(nameOrID) + if err != nil { + return types.Network{}, err + } + return *network, nil +} diff --git a/vendor/github.com/containers/common/libnetwork/netavark/const.go b/vendor/github.com/containers/common/libnetwork/netavark/const.go new file mode 100644 index 000000000..9709315c6 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/netavark/const.go @@ -0,0 +1,5 @@ +// +build linux + +package netavark + +const defaultBridgeName = "podman" diff --git a/vendor/github.com/containers/common/libnetwork/netavark/exec.go b/vendor/github.com/containers/common/libnetwork/netavark/exec.go new file mode 100644 index 000000000..69466a423 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/netavark/exec.go @@ -0,0 +1,161 @@ +// +build linux + +package netavark + +import ( + "encoding/json" + "errors" + "io" + "os" + "os/exec" + "strconv" + + "github.com/sirupsen/logrus" +) + +type netavarkError struct { + exitCode int + // Set the json key to "error" so we can directly unmarshal into this struct + Msg string `json:"error"` + err error +} + +func (e *netavarkError) Error() string { + ec := "" + // only add the exit code the the error message if we have at least info log level + // the normal user does not need to care about the number + if e.exitCode > 0 && logrus.IsLevelEnabled(logrus.InfoLevel) { + ec = " (exit code " + strconv.Itoa(e.exitCode) + ")" + } + msg := "netavark" + ec + if len(msg) > 0 { + msg += ": " + e.Msg + } + if e.err != nil { + msg += ": " + e.err.Error() + } + return msg +} + +func (e *netavarkError) Unwrap() error { + return e.err +} + +func newNetavarkError(msg string, err error) error { + return &netavarkError{ + Msg: msg, + err: err, + } +} + +// Type to implement io.Writer interface +// This will write the logrus at info level +type logrusNetavarkWriter struct{} + +func (l *logrusNetavarkWriter) Write(b []byte) (int, error) { + logrus.Info("netavark: ", string(b)) + return len(b), nil +} + +// getRustLogEnv returns the RUST_LOG env var based on the current logrus level +func getRustLogEnv() string { + level := logrus.GetLevel().String() + // rust env_log uses warn instead of warning + if level == "warning" { + level = "warn" + } + // the rust netlink library is very verbose + // make sure to only log netavark logs + return "RUST_LOG=netavark=" + level +} + +// execNetavark will execute netavark with the following arguments +// It takes the path to the binary, the list of args and an interface which is +// marshaled to json and send via stdin to netavark. The result interface is +// used to marshal the netavark output into it. This can be nil. +// All errors return by this function should be of the type netavarkError +// to provide a helpful error message. +func (n *netavarkNetwork) execNetavark(args []string, stdin, result interface{}) error { + stdinR, stdinW, err := os.Pipe() + if err != nil { + return newNetavarkError("failed to create stdin pipe", err) + } + stdinWClosed := false + defer func() { + stdinR.Close() + if !stdinWClosed { + stdinW.Close() + } + }() + + stdoutR, stdoutW, err := os.Pipe() + if err != nil { + return newNetavarkError("failed to create stdout pipe", err) + } + stdoutWClosed := false + defer func() { + stdoutR.Close() + if !stdoutWClosed { + stdoutW.Close() + } + }() + + // connect stderr to the podman stderr for logging + var logWriter io.Writer = os.Stderr + if n.syslog { + // connect logrus to stderr as well so that the logs will be written to the syslog as well + logWriter = io.MultiWriter(logWriter, &logrusNetavarkWriter{}) + } + + cmd := exec.Command(n.netavarkBinary, args...) + // connect the pipes to stdin and stdout + cmd.Stdin = stdinR + cmd.Stdout = stdoutW + cmd.Stderr = logWriter + // set the netavark log level to the same as the podman + cmd.Env = append(os.Environ(), getRustLogEnv()) + // if we run with debug log level lets also set RUST_BACKTRACE=1 so we can get the full stack trace in case of panics + if logrus.IsLevelEnabled(logrus.DebugLevel) { + cmd.Env = append(cmd.Env, "RUST_BACKTRACE=1") + } + + err = cmd.Start() + if err != nil { + return newNetavarkError("failed to start process", err) + } + err = json.NewEncoder(stdinW).Encode(stdin) + // we have to close stdinW so netavark gets the EOF and does not hang forever + stdinW.Close() + stdinWClosed = true + if err != nil { + return newNetavarkError("failed to encode stdin data", err) + } + + dec := json.NewDecoder(stdoutR) + + err = cmd.Wait() + // we have to close stdoutW so we can decode the json without hanging forever + stdoutW.Close() + stdoutWClosed = true + if err != nil { + exitError := &exec.ExitError{} + if errors.As(err, &exitError) { + ne := &netavarkError{} + // lets disallow unknown fields to make sure we do not get some unexpected stuff + dec.DisallowUnknownFields() + // this will unmarshal the error message into the error struct + ne.err = dec.Decode(ne) + ne.exitCode = exitError.ExitCode() + return ne + } + return newNetavarkError("unexpected failure during execution", err) + } + + if result != nil { + err = dec.Decode(result) + if err != nil { + return newNetavarkError("failed to decode result", err) + } + } + return nil +} diff --git a/vendor/github.com/containers/common/libnetwork/netavark/ipam.go b/vendor/github.com/containers/common/libnetwork/netavark/ipam.go new file mode 100644 index 000000000..f99d099ca --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/netavark/ipam.go @@ -0,0 +1,372 @@ +// +build linux + +package netavark + +import ( + "encoding/json" + "fmt" + "net" + + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/libnetwork/util" + "github.com/pkg/errors" + "go.etcd.io/bbolt" +) + +// IPAM boltdb structure +// Each network has their own bucket with the network name as bucket key. +// Inside the network bucket there is an ID bucket which maps the container ID (key) +// to a json array of ip addresses (value). +// The network bucket also has a bucket for each subnet, the subnet is used as key. +// Inside the subnet bucket an ip is used as key and the container ID as value. + +const ( + idBucket = "ids" + // lastIP this is used as key to store the last allocated ip + // note that this string should not be 4 or 16 byte long + lastIP = "lastIP" +) + +var ( + idBucketKey = []byte(idBucket) + lastIPKey = []byte(lastIP) +) + +type ipamError struct { + msg string + cause error +} + +func (e *ipamError) Error() string { + msg := "IPAM error" + if e.msg != "" { + msg += ": " + e.msg + } + if e.cause != nil { + msg += ": " + e.cause.Error() + } + return msg +} + +func newIPAMError(cause error, msg string, args ...interface{}) *ipamError { + return &ipamError{ + msg: fmt.Sprintf(msg, args...), + cause: cause, + } +} + +// openDB will open the ipam database +// Note that the caller has to Close it. +func (n *netavarkNetwork) openDB() (*bbolt.DB, error) { + // linter complains about the octal value + // nolint:gocritic + db, err := bbolt.Open(n.ipamDBPath, 0600, nil) + if err != nil { + return nil, newIPAMError(err, "failed to open database %s", n.ipamDBPath) + } + return db, nil +} + +// allocIPs will allocate ips for the the container. It will change the +// NetworkOptions in place. When static ips are given it will validate +// that these are free to use and will allocate them to the container. +func (n *netavarkNetwork) allocIPs(opts *types.NetworkOptions) error { + db, err := n.openDB() + if err != nil { + return err + } + defer db.Close() + + err = db.Update(func(tx *bbolt.Tx) error { + for netName, netOpts := range opts.Networks { + network := n.networks[netName] + if network == nil { + return newIPAMError(nil, "could not find network %q", netName) + } + + // check if we have to alloc ips + if !requiresIPAMAlloc(network) { + continue + } + + // create/get network bucket + netBkt, err := tx.CreateBucketIfNotExists([]byte(netName)) + if err != nil { + return newIPAMError(err, "failed to create/get network bucket for network %s", netName) + } + + // requestIPs is the list of ips which should be used for this container + requestIPs := make([]net.IP, 0, len(network.Subnets)) + + for i := range network.Subnets { + subnetBkt, err := netBkt.CreateBucketIfNotExists([]byte(network.Subnets[i].Subnet.String())) + if err != nil { + return newIPAMError(err, "failed to create/get subnet bucket for network %s", netName) + } + + // search for a static ip which matches the current subnet + // in this case the user wants this one and we should not assign a free one + var ip net.IP + for _, staticIP := range netOpts.StaticIPs { + if network.Subnets[i].Subnet.Contains(staticIP) { + ip = staticIP + break + } + } + + // when static ip is requested for this network + if ip != nil { + // convert to 4 byte ipv4 if needed + util.NormalizeIP(&ip) + id := subnetBkt.Get(ip) + if id != nil { + return newIPAMError(nil, "requested ip address %s is already allocated to container ID %s", ip.String(), string(id)) + } + } else { + ip, err = getFreeIPFromBucket(subnetBkt, &network.Subnets[i]) + if err != nil { + return err + } + err = subnetBkt.Put(lastIPKey, ip) + if err != nil { + return newIPAMError(err, "failed to store last ip in database") + } + } + + err = subnetBkt.Put(ip, []byte(opts.ContainerID)) + if err != nil { + return newIPAMError(err, "failed to store ip in database") + } + + requestIPs = append(requestIPs, ip) + } + + idsBucket, err := netBkt.CreateBucketIfNotExists(idBucketKey) + if err != nil { + return newIPAMError(err, "failed to create/get id bucket for network %s", netName) + } + + ipsBytes, err := json.Marshal(requestIPs) + if err != nil { + return newIPAMError(err, "failed to marshal ips") + } + + err = idsBucket.Put([]byte(opts.ContainerID), ipsBytes) + if err != nil { + return newIPAMError(err, "failed to store ips in database") + } + + netOpts.StaticIPs = requestIPs + opts.Networks[netName] = netOpts + } + return nil + }) + return err +} + +func getFreeIPFromBucket(bucket *bbolt.Bucket, subnet *types.Subnet) (net.IP, error) { + var rangeStart net.IP + var rangeEnd net.IP + if subnet.LeaseRange != nil { + rangeStart = subnet.LeaseRange.StartIP + rangeEnd = subnet.LeaseRange.EndIP + } + + if rangeStart == nil { + // let start with the first ip in subnet + rangeStart = util.NextIP(subnet.Subnet.IP) + } + + if rangeEnd == nil { + lastIP, err := util.LastIPInSubnet(&subnet.Subnet.IPNet) + // this error should never happen but lets check anyways to prevent panics + if err != nil { + return nil, errors.Wrap(err, "failed to get lastIP") + } + // ipv4 uses the last ip in a subnet for broadcast so we cannot use it + if util.IsIPv4(lastIP) { + lastIP = util.PrevIP(lastIP) + } + rangeEnd = lastIP + } + + lastIPByte := bucket.Get(lastIPKey) + curIP := net.IP(lastIPByte) + if curIP == nil { + curIP = rangeStart + } else { + curIP = util.NextIP(curIP) + } + + // store the start ip to make sure we know when we looped over all available ips + startIP := curIP + + for { + // skip the gateway + if subnet.Gateway != nil { + if util.Cmp(curIP, subnet.Gateway) == 0 { + curIP = util.NextIP(curIP) + continue + } + } + + // if we are at the end we need to jump back to the start ip + if util.Cmp(curIP, rangeEnd) > 0 { + if util.Cmp(rangeStart, startIP) == 0 { + return nil, newIPAMError(nil, "failed to find free IP in range: %s - %s", rangeStart.String(), rangeEnd.String()) + } + curIP = rangeStart + continue + } + + // check if ip is already used by another container + // if not return it + if bucket.Get(curIP) == nil { + return curIP, nil + } + + curIP = util.NextIP(curIP) + + if util.Cmp(curIP, startIP) == 0 { + return nil, newIPAMError(nil, "failed to find free IP in range: %s - %s", rangeStart.String(), rangeEnd.String()) + } + } +} + +// getAssignedIPs will read the ipam database and will fill in the used ips for this container. +// It will change the NetworkOptions in place. +func (n *netavarkNetwork) getAssignedIPs(opts *types.NetworkOptions) error { + db, err := n.openDB() + if err != nil { + return err + } + defer db.Close() + + err = db.View(func(tx *bbolt.Tx) error { + for netName, netOpts := range opts.Networks { + network := n.networks[netName] + if network == nil { + return newIPAMError(nil, "could not find network %q", netName) + } + + // check if we have to alloc ips + if !requiresIPAMAlloc(network) { + continue + } + // get network bucket + netBkt := tx.Bucket([]byte(netName)) + if netBkt == nil { + return newIPAMError(nil, "failed to get network bucket for network %s", netName) + } + + idBkt := netBkt.Bucket(idBucketKey) + if idBkt == nil { + return newIPAMError(nil, "failed to get id bucket for network %s", netName) + } + + ipJSON := idBkt.Get([]byte(opts.ContainerID)) + if ipJSON == nil { + return newIPAMError(nil, "failed to get ips for container ID %s on network %s", opts.ContainerID, netName) + } + + // assignedIPs is the list of ips which should be used for this container + assignedIPs := make([]net.IP, 0, len(network.Subnets)) + + err = json.Unmarshal(ipJSON, &assignedIPs) + if err != nil { + return newIPAMError(err, "failed to unmarshal ips from database") + } + + for i := range assignedIPs { + util.NormalizeIP(&assignedIPs[i]) + } + + netOpts.StaticIPs = assignedIPs + opts.Networks[netName] = netOpts + } + return nil + }) + return err +} + +// deallocIPs will release the ips in the network options from the DB so that +// they can be reused by other containers. It expects that the network options +// are already filled with the correct ips. Use getAssignedIPs() for this. +func (n *netavarkNetwork) deallocIPs(opts *types.NetworkOptions) error { + db, err := n.openDB() + if err != nil { + return err + } + defer db.Close() + + err = db.Update(func(tx *bbolt.Tx) error { + for netName, netOpts := range opts.Networks { + network := n.networks[netName] + if network == nil { + return newIPAMError(nil, "could not find network %q", netName) + } + + // check if we have to alloc ips + if !requiresIPAMAlloc(network) { + continue + } + // get network bucket + netBkt := tx.Bucket([]byte(netName)) + if netBkt == nil { + return newIPAMError(nil, "failed to get network bucket for network %s", netName) + } + + for _, subnet := range network.Subnets { + subnetBkt := netBkt.Bucket([]byte(subnet.Subnet.String())) + if subnetBkt == nil { + return newIPAMError(nil, "failed to get subnet bucket for network %s", netName) + } + + // search for a static ip which matches the current subnet + // in this case the user wants this one and we should not assign a free one + var ip net.IP + for _, staticIP := range netOpts.StaticIPs { + if subnet.Subnet.Contains(staticIP) { + ip = staticIP + break + } + } + if ip == nil { + return newIPAMError(nil, "failed to find ip for subnet %s on network %s", subnet.Subnet.String(), netName) + } + util.NormalizeIP(&ip) + + err = subnetBkt.Delete(ip) + if err != nil { + return newIPAMError(err, "failed to remove ip %s from subnet bucket for network %s", ip.String(), netName) + } + } + + idBkt := netBkt.Bucket(idBucketKey) + if idBkt == nil { + return newIPAMError(nil, "failed to get id bucket for network %s", netName) + } + + err = idBkt.Delete([]byte(opts.ContainerID)) + if err != nil { + return newIPAMError(err, "failed to remove allocated ips for container ID %s on network %s", opts.ContainerID, netName) + } + } + return nil + }) + return err +} + +// requiresIPAMAlloc return true when we have to allocate ips for this network +// it checks the ipam driver and if subnets are set +func requiresIPAMAlloc(network *types.Network) bool { + // only do host allocation when driver is set to HostLocalIPAMDriver or unset + switch network.IPAMOptions["driver"] { + case "", types.HostLocalIPAMDriver: + default: + return false + } + + // no subnets == no ips to assign + return len(network.Subnets) > 0 +} diff --git a/vendor/github.com/containers/common/libnetwork/netavark/network.go b/vendor/github.com/containers/common/libnetwork/netavark/network.go new file mode 100644 index 000000000..ce252bc1d --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/netavark/network.go @@ -0,0 +1,293 @@ +// +build linux + +package netavark + +import ( + "encoding/json" + "io/ioutil" + "os" + "path/filepath" + "strings" + "time" + + "github.com/containers/common/libnetwork/internal/util" + "github.com/containers/common/libnetwork/types" + "github.com/containers/storage/pkg/lockfile" + "github.com/pkg/errors" + "github.com/sirupsen/logrus" +) + +type netavarkNetwork struct { + // networkConfigDir is directory where the network config files are stored. + networkConfigDir string + + // netavarkBinary is the path to the netavark binary. + netavarkBinary string + + // defaultNetwork is the name for the default network. + defaultNetwork string + // defaultSubnet is the default subnet for the default network. + defaultSubnet types.IPNet + + // ipamDBPath is the path to the ip allocation bolt db + ipamDBPath string + + // syslog describes whenever the netavark debbug output should be log to the syslog as well. + // This will use logrus to do so, make sure logrus is set up to log to the syslog. + syslog bool + + // lock is a internal lock for critical operations + lock lockfile.Locker + + // modTime is the timestamp when the config dir was modified + modTime time.Time + + // networks is a map with loaded networks, the key is the network name + networks map[string]*types.Network +} + +type InitConfig struct { + // NetworkConfigDir is directory where the network config files are stored. + NetworkConfigDir string + + // NetavarkBinary is the path to the netavark binary. + NetavarkBinary string + + // NetworkRunDir is where temporary files are stored, i.e.the ipam db. + NetworkRunDir string + + // DefaultNetwork is the name for the default network. + DefaultNetwork string + // DefaultSubnet is the default subnet for the default network. + DefaultSubnet string + + // Syslog describes whenever the netavark debbug output should be log to the syslog as well. + // This will use logrus to do so, make sure logrus is set up to log to the syslog. + Syslog bool +} + +// NewNetworkInterface creates the ContainerNetwork interface for the netavark backend. +// Note: The networks are not loaded from disk until a method is called. +func NewNetworkInterface(conf *InitConfig) (types.ContainerNetwork, error) { + // TODO: consider using a shared memory lock + lock, err := lockfile.GetLockfile(filepath.Join(conf.NetworkConfigDir, "netavark.lock")) + if err != nil { + return nil, err + } + + defaultNetworkName := conf.DefaultNetwork + if defaultNetworkName == "" { + defaultNetworkName = types.DefaultNetworkName + } + + defaultSubnet := conf.DefaultSubnet + if defaultSubnet == "" { + defaultSubnet = types.DefaultSubnet + } + defaultNet, err := types.ParseCIDR(defaultSubnet) + if err != nil { + return nil, errors.Wrap(err, "failed to parse default subnet") + } + + if err := os.MkdirAll(conf.NetworkConfigDir, 0755); err != nil { + return nil, err + } + + if err := os.MkdirAll(conf.NetworkRunDir, 0755); err != nil { + return nil, err + } + + n := &netavarkNetwork{ + networkConfigDir: conf.NetworkConfigDir, + netavarkBinary: conf.NetavarkBinary, + ipamDBPath: filepath.Join(conf.NetworkRunDir, "ipam.db"), + defaultNetwork: defaultNetworkName, + defaultSubnet: defaultNet, + lock: lock, + syslog: conf.Syslog, + } + + return n, nil +} + +// Drivers will return the list of supported network drivers +// for this interface. +func (n *netavarkNetwork) Drivers() []string { + return []string{types.BridgeNetworkDriver, types.MacVLANNetworkDriver} +} + +// DefaultNetworkName will return the default netavark network name. +func (n *netavarkNetwork) DefaultNetworkName() string { + return n.defaultNetwork +} + +func (n *netavarkNetwork) loadNetworks() error { + // check the mod time of the config dir + f, err := os.Stat(n.networkConfigDir) + if err != nil { + return err + } + modTime := f.ModTime() + + // skip loading networks if they are already loaded and + // if the config dir was not modified since the last call + if n.networks != nil && modTime.Equal(n.modTime) { + return nil + } + // make sure the remove all networks before we reload them + n.networks = nil + n.modTime = modTime + + files, err := ioutil.ReadDir(n.networkConfigDir) + if err != nil && !errors.Is(err, os.ErrNotExist) { + return err + } + + networks := make(map[string]*types.Network, len(files)) + for _, f := range files { + if f.IsDir() { + continue + } + if filepath.Ext(f.Name()) != ".json" { + continue + } + + path := filepath.Join(n.networkConfigDir, f.Name()) + file, err := os.Open(path) + if err != nil { + // do not log ENOENT errors + if !errors.Is(err, os.ErrNotExist) { + logrus.Warnf("Error loading network config file %q: %v", path, err) + } + continue + } + network := new(types.Network) + err = json.NewDecoder(file).Decode(network) + if err != nil { + logrus.Warnf("Error reading network config file %q: %v", path, err) + continue + } + + // check that the filename matches the network name + if network.Name+".json" != f.Name() { + logrus.Warnf("Network config name %q does not match file name %q, skipping", network.Name, f.Name()) + continue + } + + if !types.NameRegex.MatchString(network.Name) { + logrus.Warnf("Network config %q has invalid name: %q, skipping: %v", path, network.Name, types.RegexError) + continue + } + + err = parseNetwork(network) + if err != nil { + logrus.Warnf("Network config %q could not be parsed, skipping: %v", path, err) + continue + } + + logrus.Debugf("Successfully loaded network %s: %v", network.Name, network) + networks[network.Name] = network + } + + // create the default network in memory if it did not exists on disk + if networks[n.defaultNetwork] == nil { + networkInfo, err := n.createDefaultNetwork() + if err != nil { + return errors.Wrapf(err, "failed to create default network %s", n.defaultNetwork) + } + networks[n.defaultNetwork] = networkInfo + } + logrus.Debugf("Successfully loaded %d networks", len(networks)) + n.networks = networks + return nil +} + +func parseNetwork(network *types.Network) error { + if network.Labels == nil { + network.Labels = map[string]string{} + } + if network.Options == nil { + network.Options = map[string]string{} + } + if network.IPAMOptions == nil { + network.IPAMOptions = map[string]string{} + } + + if len(network.ID) != 64 { + return errors.Errorf("invalid network ID %q", network.ID) + } + + return util.ValidateSubnets(network, nil) +} + +func (n *netavarkNetwork) createDefaultNetwork() (*types.Network, error) { + net := types.Network{ + Name: n.defaultNetwork, + NetworkInterface: defaultBridgeName + "0", + // Important do not change this ID + ID: "2f259bab93aaaaa2542ba43ef33eb990d0999ee1b9924b557b7be53c0b7a1bb9", + Driver: types.BridgeNetworkDriver, + Subnets: []types.Subnet{ + {Subnet: n.defaultSubnet}, + }, + } + return n.networkCreate(&net, true) +} + +// getNetwork will lookup a network by name or ID. It returns an +// error when no network was found or when more than one network +// with the given (partial) ID exists. +// getNetwork will read from the networks map, therefore the caller +// must ensure that n.lock is locked before using it. +func (n *netavarkNetwork) getNetwork(nameOrID string) (*types.Network, error) { + // fast path check the map key, this will only work for names + if val, ok := n.networks[nameOrID]; ok { + return val, nil + } + // If there was no match we might got a full or partial ID. + var net *types.Network + for _, val := range n.networks { + // This should not happen because we already looked up the map by name but check anyway. + if val.Name == nameOrID { + return val, nil + } + + if strings.HasPrefix(val.ID, nameOrID) { + if net != nil { + return nil, errors.Errorf("more than one result for network ID %s", nameOrID) + } + net = val + } + } + if net != nil { + return net, nil + } + return nil, errors.Wrapf(types.ErrNoSuchNetwork, "unable to find network with name or ID %s", nameOrID) +} + +// Implement the NetUtil interface for easy code sharing with other network interfaces. + +// ForEach call the given function for each network +func (n *netavarkNetwork) ForEach(run func(types.Network)) { + for _, val := range n.networks { + run(*val) + } +} + +// Len return the number of networks +func (n *netavarkNetwork) Len() int { + return len(n.networks) +} + +// DefaultInterfaceName return the default cni bridge name, must be suffixed with a number. +func (n *netavarkNetwork) DefaultInterfaceName() string { + return defaultBridgeName +} + +func (n *netavarkNetwork) Network(nameOrID string) (*types.Network, error) { + network, err := n.getNetwork(nameOrID) + if err != nil { + return nil, err + } + return network, nil +} diff --git a/vendor/github.com/containers/common/libnetwork/netavark/run.go b/vendor/github.com/containers/common/libnetwork/netavark/run.go new file mode 100644 index 000000000..c6f2007e2 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/netavark/run.go @@ -0,0 +1,127 @@ +// +build linux + +package netavark + +import ( + "encoding/json" + "fmt" + + "github.com/containers/common/libnetwork/internal/util" + "github.com/containers/common/libnetwork/types" + "github.com/pkg/errors" + "github.com/sirupsen/logrus" +) + +type netavarkOptions struct { + types.NetworkOptions + Networks map[string]*types.Network `json:"network_info"` +} + +// Setup will setup the container network namespace. It returns +// a map of StatusBlocks, the key is the network name. +func (n *netavarkNetwork) Setup(namespacePath string, options types.SetupOptions) (map[string]types.StatusBlock, error) { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return nil, err + } + + err = util.ValidateSetupOptions(n, namespacePath, options) + if err != nil { + return nil, err + } + + // allocate IPs in the IPAM db + err = n.allocIPs(&options.NetworkOptions) + if err != nil { + return nil, err + } + + netavarkOpts, err := n.convertNetOpts(options.NetworkOptions) + if err != nil { + return nil, errors.Wrap(err, "failed to convert net opts") + } + + // trace output to get the json + if logrus.IsLevelEnabled(logrus.TraceLevel) { + b, err := json.Marshal(&netavarkOpts) + if err != nil { + return nil, err + } + // show the full netavark command so we can easily reproduce errors from the cli + logrus.Tracef("netavark command: printf '%s' | %s setup %s", string(b), n.netavarkBinary, namespacePath) + } + + result := map[string]types.StatusBlock{} + err = n.execNetavark([]string{"setup", namespacePath}, netavarkOpts, &result) + if err != nil { + // lets dealloc ips to prevent leaking + if err := n.deallocIPs(&options.NetworkOptions); err != nil { + logrus.Error(err) + } + return nil, err + } + + // make sure that the result makes sense + if len(result) != len(options.Networks) { + logrus.Errorf("unexpected netavark result: %v", result) + return nil, fmt.Errorf("unexpected netavark result length, want (%d), got (%d) networks", len(options.Networks), len(result)) + } + + return result, err +} + +// Teardown will teardown the container network namespace. +func (n *netavarkNetwork) Teardown(namespacePath string, options types.TeardownOptions) error { + n.lock.Lock() + defer n.lock.Unlock() + err := n.loadNetworks() + if err != nil { + return err + } + + // get IPs from the IPAM db + err = n.getAssignedIPs(&options.NetworkOptions) + if err != nil { + // when there is an error getting the ips we should still continue + // to call teardown for netavark to prevent leaking network interfaces + logrus.Error(err) + } + + netavarkOpts, err := n.convertNetOpts(options.NetworkOptions) + if err != nil { + return errors.Wrap(err, "failed to convert net opts") + } + + retErr := n.execNetavark([]string{"teardown", namespacePath}, netavarkOpts, nil) + + // when netavark returned an error we still free the used ips + // otherwise we could end up in a state where block the ips forever + err = n.deallocIPs(&netavarkOpts.NetworkOptions) + if err != nil { + if retErr != nil { + logrus.Error(err) + } else { + retErr = err + } + } + + return retErr +} + +func (n *netavarkNetwork) convertNetOpts(opts types.NetworkOptions) (*netavarkOptions, error) { + netavarkOptions := netavarkOptions{ + NetworkOptions: opts, + Networks: make(map[string]*types.Network, len(opts.Networks)), + } + + for network := range opts.Networks { + net, err := n.getNetwork(network) + if err != nil { + return nil, err + } + netavarkOptions.Networks[network] = net + } + return &netavarkOptions, nil +} diff --git a/vendor/github.com/containers/common/libnetwork/network/interface.go b/vendor/github.com/containers/common/libnetwork/network/interface.go new file mode 100644 index 000000000..190e6945b --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/network/interface.go @@ -0,0 +1,132 @@ +// +build linux + +package network + +import ( + "errors" + "fmt" + "io/ioutil" + "os" + "path/filepath" + + "github.com/containers/common/libnetwork/cni" + "github.com/containers/common/libnetwork/netavark" + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/pkg/config" + "github.com/containers/storage" + "github.com/containers/storage/pkg/ioutils" + "github.com/sirupsen/logrus" +) + +const defaultNetworkBackendFileName = "defaultNetworkBackend" + +// NetworkBackend returns the network backend name and interface +// It returns either the CNI or netavark backend depending on what is set in the config. +// If the the backend is set to "" we will automatically assign the backend on the following conditions: +// 1. read ${graphroot}/defaultNetworkBackend +// 2. find netavark binary (if not installed use CNI) +// 3. check containers, images and CNI networks and if there are some we have an existing install and should continue to use CNI +func NetworkBackend(store storage.Store, conf *config.Config, syslog bool) (types.NetworkBackend, types.ContainerNetwork, error) { + backend := types.NetworkBackend(conf.Network.NetworkBackend) + if backend == "" { + var err error + backend, err = defaultNetworkBackend(store, conf) + if err != nil { + return "", nil, fmt.Errorf("failed to get default network backend: %w", err) + } + } + + switch backend { + case types.Netavark: + netavarkBin, err := conf.FindHelperBinary("netavark", false) + if err != nil { + return "", nil, err + } + netInt, err := netavark.NewNetworkInterface(&netavark.InitConfig{ + NetworkConfigDir: filepath.Join(store.GraphRoot(), "networks"), + NetworkRunDir: filepath.Join(store.RunRoot(), "networks"), + NetavarkBinary: netavarkBin, + DefaultNetwork: conf.Network.DefaultNetwork, + DefaultSubnet: conf.Network.DefaultSubnet, + Syslog: syslog, + }) + return types.Netavark, netInt, err + case types.CNI: + netInt, err := getCniInterface(conf) + return types.CNI, netInt, err + + default: + return "", nil, fmt.Errorf("unsupported network backend %q, check network_backend in containers.conf", backend) + } +} + +func defaultNetworkBackend(store storage.Store, conf *config.Config) (backend types.NetworkBackend, err error) { + // read defaultNetworkBackend file + file := filepath.Join(store.GraphRoot(), defaultNetworkBackendFileName) + b, err := ioutil.ReadFile(file) + if err == nil { + val := string(b) + if val == string(types.Netavark) { + return types.Netavark, nil + } + if val == string(types.CNI) { + return types.CNI, nil + } + return "", fmt.Errorf("unknown network backend value %q in %q", val, file) + } + // fail for all errors except ENOENT + if !errors.Is(err, os.ErrNotExist) { + return "", fmt.Errorf("could not read network backend value: %w", err) + } + + // cache the network backend to make sure always the same one will be used + defer func() { + // only write when there is no error + if err == nil { + // nolint:gocritic + if err := ioutils.AtomicWriteFile(file, []byte(backend), 0644); err != nil { + logrus.Errorf("could not write network backend to file: %v", err) + } + } + }() + + _, err = conf.FindHelperBinary("netavark", false) + if err != nil { + // if we cannot find netavark use CNI + return types.CNI, nil + } + + // now check if there are already containers, images and CNI networks (new install?) + cons, err := store.Containers() + if err != nil { + return "", err + } + if len(cons) == 0 { + imgs, err := store.Images() + if err != nil { + return "", err + } + if len(imgs) == 0 { + cniInterface, err := getCniInterface(conf) + if err == nil { + nets, err := cniInterface.NetworkList() + // there is always a default network so check <= 1 + if err == nil && len(nets) <= 1 { + // we have a fresh system so use netavark + return types.Netavark, nil + } + } + } + } + return types.CNI, nil +} + +func getCniInterface(conf *config.Config) (types.ContainerNetwork, error) { + return cni.NewCNINetworkInterface(&cni.InitConfig{ + CNIConfigDir: conf.Network.NetworkConfigDir, + CNIPluginDirs: conf.Network.CNIPluginDirs, + DefaultNetwork: conf.Network.DefaultNetwork, + DefaultSubnet: conf.Network.DefaultSubnet, + IsMachine: conf.Engine.MachineEnabled, + }) +} diff --git a/vendor/github.com/containers/common/libnetwork/types/const.go b/vendor/github.com/containers/common/libnetwork/types/const.go new file mode 100644 index 000000000..b2d4a4538 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/types/const.go @@ -0,0 +1,47 @@ +package types + +const ( + // BridgeNetworkDriver defines the bridge driver + BridgeNetworkDriver = "bridge" + // DefaultNetworkDriver is the default network type used + DefaultNetworkDriver = BridgeNetworkDriver + // MacVLANNetworkDriver defines the macvlan driver + MacVLANNetworkDriver = "macvlan" + // MacVLANNetworkDriver defines the macvlan driver + IPVLANNetworkDriver = "ipvlan" + + // IPAM drivers + // HostLocalIPAMDriver store the ip + HostLocalIPAMDriver = "host-local" + // DHCPIPAMDriver get subnet and ip from dhcp server + DHCPIPAMDriver = "dhcp" + + // DefaultSubnet is the name that will be used for the default CNI network. + DefaultNetworkName = "podman" + // DefaultSubnet is the subnet that will be used for the default CNI network. + DefaultSubnet = "10.88.0.0/16" + + // valid macvlan driver mode values + MacVLANModeBridge = "bridge" + MacVLANModePrivate = "private" + MacVLANModeVepa = "vepa" + MacVLANModePassthru = "passthru" + + // valid ipvlan driver modes + IPVLANModeL2 = "l2" + IPVLANModeL3 = "l3" + IPVLANModeL3s = "l3s" +) + +type NetworkBackend string + +const ( + CNI NetworkBackend = "cni" + Netavark NetworkBackend = "netavark" +) + +// ValidMacVLANModes is the list of valid mode options for the macvlan driver +var ValidMacVLANModes = []string{MacVLANModeBridge, MacVLANModePrivate, MacVLANModeVepa, MacVLANModePassthru} + +// ValidIPVLANModes is the list of valid mode options for the ipvlan driver +var ValidIPVLANModes = []string{IPVLANModeL2, IPVLANModeL3, IPVLANModeL3s} diff --git a/vendor/github.com/containers/common/libnetwork/types/define.go b/vendor/github.com/containers/common/libnetwork/types/define.go new file mode 100644 index 000000000..d37e529df --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/types/define.go @@ -0,0 +1,25 @@ +package types + +import ( + "regexp" + + "github.com/pkg/errors" +) + +var ( + // ErrNoSuchNetwork indicates the requested network does not exist + ErrNoSuchNetwork = errors.New("network not found") + + // ErrInvalidArg indicates that an invalid argument was passed + ErrInvalidArg = errors.New("invalid argument") + + // ErrNetworkExists indicates that a network with the given name already + // exists. + ErrNetworkExists = errors.New("network already exists") + + // NameRegex is a regular expression to validate names. + // This must NOT be changed. + NameRegex = regexp.MustCompile("^[a-zA-Z0-9][a-zA-Z0-9_.-]*$") + // RegexError is thrown in presence of an invalid name. + RegexError = errors.Wrapf(ErrInvalidArg, "names must match [a-zA-Z0-9][a-zA-Z0-9_.-]*") +) diff --git a/vendor/github.com/containers/common/libnetwork/types/network.go b/vendor/github.com/containers/common/libnetwork/types/network.go new file mode 100644 index 000000000..de8655377 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/types/network.go @@ -0,0 +1,282 @@ +package types + +import ( + "encoding/json" + "net" + "time" +) + +type ContainerNetwork interface { + // NetworkCreate will take a partial filled Network and fill the + // missing fields. It creates the Network and returns the full Network. + NetworkCreate(Network) (Network, error) + // NetworkRemove will remove the Network with the given name or ID. + NetworkRemove(nameOrID string) error + // NetworkList will return all known Networks. Optionally you can + // supply a list of filter functions. Only if a network matches all + // functions it is returned. + NetworkList(...FilterFunc) ([]Network, error) + // NetworkInspect will return the Network with the given name or ID. + NetworkInspect(nameOrID string) (Network, error) + + // Setup will setup the container network namespace. It returns + // a map of StatusBlocks, the key is the network name. + Setup(namespacePath string, options SetupOptions) (map[string]StatusBlock, error) + // Teardown will teardown the container network namespace. + Teardown(namespacePath string, options TeardownOptions) error + + // Drivers will return the list of supported network drivers + // for this interface. + Drivers() []string + + // DefaultNetworkName will return the default network name + // for this interface. + DefaultNetworkName() string +} + +// Network describes the Network attributes. +type Network struct { + // Name of the Network. + Name string `json:"name"` + // ID of the Network. + ID string `json:"id"` + // Driver for this Network, e.g. bridge, macvlan... + Driver string `json:"driver"` + // NetworkInterface is the network interface name on the host. + NetworkInterface string `json:"network_interface,omitempty"` + // Created contains the timestamp when this network was created. + Created time.Time `json:"created,omitempty"` + // Subnets to use for this network. + Subnets []Subnet `json:"subnets,omitempty"` + // IPv6Enabled if set to true an ipv6 subnet should be created for this net. + IPv6Enabled bool `json:"ipv6_enabled"` + // Internal is whether the Network should not have external routes + // to public or other Networks. + Internal bool `json:"internal"` + // DNSEnabled is whether name resolution is active for container on + // this Network. + DNSEnabled bool `json:"dns_enabled"` + // Labels is a set of key-value labels that have been applied to the + // Network. + Labels map[string]string `json:"labels,omitempty"` + // Options is a set of key-value options that have been applied to + // the Network. + Options map[string]string `json:"options,omitempty"` + // IPAMOptions contains options used for the ip assignment. + IPAMOptions map[string]string `json:"ipam_options,omitempty"` +} + +// IPNet is used as custom net.IPNet type to add Marshal/Unmarshal methods. +type IPNet struct { + net.IPNet +} + +// ParseCIDR parse a string to IPNet +func ParseCIDR(cidr string) (IPNet, error) { + ip, subnet, err := net.ParseCIDR(cidr) + if err != nil { + return IPNet{}, err + } + // convert to 4 bytes if ipv4 + ipv4 := ip.To4() + if ipv4 != nil { + ip = ipv4 + } + subnet.IP = ip + return IPNet{*subnet}, err +} + +func (n *IPNet) MarshalText() ([]byte, error) { + return []byte(n.String()), nil +} + +func (n *IPNet) UnmarshalText(text []byte) error { + subnet, err := ParseCIDR(string(text)) + if err != nil { + return err + } + *n = subnet + return nil +} + +// HardwareAddr is the same as net.HardwareAddr except +// that it adds the json marshal/unmarshal methods. +// This allows us to read the mac from a json string +// and a byte array. +// swagger:model MacAddress +type HardwareAddr net.HardwareAddr + +func (h *HardwareAddr) String() string { + return (*net.HardwareAddr)(h).String() +} + +func (h HardwareAddr) MarshalText() ([]byte, error) { + return []byte(h.String()), nil +} + +func (h *HardwareAddr) UnmarshalJSON(text []byte) error { + if len(text) == 0 { + *h = nil + return nil + } + + // if the json string start with a quote we got a string + // unmarshal the string and parse the mac from this string + if string(text[0]) == `"` { + var macString string + err := json.Unmarshal(text, &macString) + if err == nil { + mac, err := net.ParseMAC(macString) + if err == nil { + *h = HardwareAddr(mac) + return nil + } + } + } + // not a string or got an error fallback to the normal parsing + mac := make(net.HardwareAddr, 0, 6) + // use the standard json unmarshal for backwards compat + err := json.Unmarshal(text, &mac) + if err != nil { + return err + } + *h = HardwareAddr(mac) + return nil +} + +type Subnet struct { + // Subnet for this Network in CIDR form. + // swagger:strfmt string + Subnet IPNet `json:"subnet"` + // Gateway IP for this Network. + // swagger:strfmt string + Gateway net.IP `json:"gateway,omitempty"` + // LeaseRange contains the range where IP are leased. Optional. + LeaseRange *LeaseRange `json:"lease_range,omitempty"` +} + +// LeaseRange contains the range where IP are leased. +type LeaseRange struct { + // StartIP first IP in the subnet which should be used to assign ips. + // swagger:strfmt string + StartIP net.IP `json:"start_ip,omitempty"` + // EndIP last IP in the subnet which should be used to assign ips. + // swagger:strfmt string + EndIP net.IP `json:"end_ip,omitempty"` +} + +// StatusBlock contains the network information about a container +// connected to one Network. +type StatusBlock struct { + // Interfaces contains the created network interface in the container. + // The map key is the interface name. + Interfaces map[string]NetInterface `json:"interfaces,omitempty"` + // DNSServerIPs nameserver addresses which should be added to + // the containers resolv.conf file. + DNSServerIPs []net.IP `json:"dns_server_ips,omitempty"` + // DNSSearchDomains search domains which should be added to + // the containers resolv.conf file. + DNSSearchDomains []string `json:"dns_search_domains,omitempty"` +} + +// NetInterface contains the settings for a given network interface. +type NetInterface struct { + // Subnets list of assigned subnets with their gateway. + Subnets []NetAddress `json:"subnets,omitempty"` + // MacAddress for this Interface. + MacAddress HardwareAddr `json:"mac_address"` +} + +// NetAddress contains the ip address, subnet and gateway. +type NetAddress struct { + // IPNet of this NetAddress. Note that this is a subnet but it has to contain the + // actual ip of the network interface and not the network address. + IPNet IPNet `json:"ipnet"` + // Gateway for the network. This can be empty if there is no gateway, e.g. internal network. + Gateway net.IP `json:"gateway,omitempty"` +} + +// PerNetworkOptions are options which should be set on a per network basis. +type PerNetworkOptions struct { + // StaticIPs for this container. Optional. + StaticIPs []net.IP `json:"static_ips,omitempty"` + // Aliases contains a list of names which the dns server should resolve + // to this container. Should only be set when DNSEnabled is true on the Network. + // If aliases are set but there is no dns support for this network the + // network interface implementation should ignore this and NOT error. + // Optional. + Aliases []string `json:"aliases,omitempty"` + // StaticMac for this container. Optional. + StaticMAC HardwareAddr `json:"static_mac,omitempty"` + // InterfaceName for this container. Required in the backend. + // Optional in the frontend. Will be filled with ethX (where X is a integer) when empty. + InterfaceName string `json:"interface_name"` +} + +// NetworkOptions for a given container. +type NetworkOptions struct { + // ContainerID is the container id, used for iptables comments and ipam allocation. + ContainerID string `json:"container_id"` + // ContainerName is the container name, used as dns name. + ContainerName string `json:"container_name"` + // PortMappings contains the port mappings for this container + PortMappings []PortMapping `json:"port_mappings,omitempty"` + // Networks contains all networks with the PerNetworkOptions. + // The map should contain at least one element. + Networks map[string]PerNetworkOptions `json:"networks"` +} + +// PortMapping is one or more ports that will be mapped into the container. +type PortMapping struct { + // HostIP is the IP that we will bind to on the host. + // If unset, assumed to be 0.0.0.0 (all interfaces). + HostIP string `json:"host_ip"` + // ContainerPort is the port number that will be exposed from the + // container. + // Mandatory. + ContainerPort uint16 `json:"container_port"` + // HostPort is the port number that will be forwarded from the host into + // the container. + // If omitted, a random port on the host (guaranteed to be over 1024) + // will be assigned. + HostPort uint16 `json:"host_port"` + // Range is the number of ports that will be forwarded, starting at + // HostPort and ContainerPort and counting up. + // This is 1-indexed, so 1 is assumed to be a single port (only the + // Hostport:Containerport mapping will be added), 2 is two ports (both + // Hostport:Containerport and Hostport+1:Containerport+1), etc. + // If unset, assumed to be 1 (a single port). + // Both hostport + range and containerport + range must be less than + // 65536. + Range uint16 `json:"range"` + // Protocol is the protocol forward. + // Must be either "tcp", "udp", and "sctp", or some combination of these + // separated by commas. + // If unset, assumed to be TCP. + Protocol string `json:"protocol"` +} + +// OCICNIPortMapping maps to the standard CNI portmapping Capability. +// Deprecated: Do not use this struct for new fields. This only exists +// for backwards compatibility. +type OCICNIPortMapping struct { + // HostPort is the port number on the host. + HostPort int32 `json:"hostPort"` + // ContainerPort is the port number inside the sandbox. + ContainerPort int32 `json:"containerPort"` + // Protocol is the protocol of the port mapping. + Protocol string `json:"protocol"` + // HostIP is the host ip to use. + HostIP string `json:"hostIP"` +} + +type SetupOptions struct { + NetworkOptions +} + +type TeardownOptions struct { + NetworkOptions +} + +// FilterFunc can be passed to NetworkList to filter the networks. +type FilterFunc func(Network) bool diff --git a/vendor/github.com/containers/common/libnetwork/util/filters.go b/vendor/github.com/containers/common/libnetwork/util/filters.go new file mode 100644 index 000000000..b27ca1f9a --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/util/filters.go @@ -0,0 +1,80 @@ +package util + +import ( + "strings" + + "github.com/containers/common/libnetwork/types" + "github.com/containers/common/pkg/filters" + "github.com/containers/common/pkg/util" + "github.com/pkg/errors" +) + +func GenerateNetworkFilters(f map[string][]string) ([]types.FilterFunc, error) { + filterFuncs := make([]types.FilterFunc, 0, len(f)) + for key, filterValues := range f { + filterFunc, err := createFilterFuncs(key, filterValues) + if err != nil { + return nil, err + } + filterFuncs = append(filterFuncs, filterFunc) + } + return filterFuncs, nil +} + +func createFilterFuncs(key string, filterValues []string) (types.FilterFunc, error) { + switch strings.ToLower(key) { + case "name": + // matches one name, regex allowed + return func(net types.Network) bool { + return util.StringMatchRegexSlice(net.Name, filterValues) + }, nil + + case "driver": + // matches network driver + return func(net types.Network) bool { + return util.StringInSlice(net.Driver, filterValues) + }, nil + + case "id": + // matches part of one id + return func(net types.Network) bool { + return util.StringMatchRegexSlice(net.ID, filterValues) + }, nil + + // TODO: add dns enabled, internal filter + } + return createPruneFilterFuncs(key, filterValues) +} + +func GenerateNetworkPruneFilters(f map[string][]string) ([]types.FilterFunc, error) { + filterFuncs := make([]types.FilterFunc, 0, len(f)) + for key, filterValues := range f { + filterFunc, err := createPruneFilterFuncs(key, filterValues) + if err != nil { + return nil, err + } + filterFuncs = append(filterFuncs, filterFunc) + } + return filterFuncs, nil +} + +func createPruneFilterFuncs(key string, filterValues []string) (types.FilterFunc, error) { + switch strings.ToLower(key) { + case "label": + // matches all labels + return func(net types.Network) bool { + return filters.MatchLabelFilters(filterValues, net.Labels) + }, nil + + case "until": + until, err := filters.ComputeUntilTimestamp(filterValues) + if err != nil { + return nil, err + } + return func(net types.Network) bool { + return net.Created.Before(until) + }, nil + default: + return nil, errors.Errorf("invalid filter %q", key) + } +} diff --git a/vendor/github.com/containers/common/libnetwork/util/ip.go b/vendor/github.com/containers/common/libnetwork/util/ip.go new file mode 100644 index 000000000..7c315e312 --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/util/ip.go @@ -0,0 +1,56 @@ +package util + +import ( + "net" +) + +// IsIPv6 returns true if netIP is IPv6. +func IsIPv6(netIP net.IP) bool { + return netIP != nil && netIP.To4() == nil +} + +// IsIPv4 returns true if netIP is IPv4. +func IsIPv4(netIP net.IP) bool { + return netIP != nil && netIP.To4() != nil +} + +// LastIPInSubnet gets the last IP in a subnet +func LastIPInSubnet(addr *net.IPNet) (net.IP, error) { //nolint:interfacer + // re-parse to ensure clean network address + _, cidr, err := net.ParseCIDR(addr.String()) + if err != nil { + return nil, err + } + + ones, bits := cidr.Mask.Size() + if ones == bits { + return cidr.IP, nil + } + for i := range cidr.IP { + cidr.IP[i] |= ^cidr.Mask[i] + } + return cidr.IP, nil +} + +// FirstIPInSubnet gets the first IP in a subnet +func FirstIPInSubnet(addr *net.IPNet) (net.IP, error) { //nolint:interfacer + // re-parse to ensure clean network address + _, cidr, err := net.ParseCIDR(addr.String()) + if err != nil { + return nil, err + } + ones, bits := cidr.Mask.Size() + if ones == bits { + return cidr.IP, nil + } + cidr.IP[len(cidr.IP)-1]++ + return cidr.IP, nil +} + +// NormalizeIP will transform the given ip to the 4 byte len ipv4 if possible +func NormalizeIP(ip *net.IP) { + ipv4 := ip.To4() + if ipv4 != nil { + *ip = ipv4 + } +} diff --git a/vendor/github.com/containers/common/libnetwork/util/ip_calc.go b/vendor/github.com/containers/common/libnetwork/util/ip_calc.go new file mode 100644 index 000000000..a27ddf78b --- /dev/null +++ b/vendor/github.com/containers/common/libnetwork/util/ip_calc.go @@ -0,0 +1,53 @@ +// Copyright 2015 CNI 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 util + +import ( + "math/big" + "net" +) + +// NextIP returns IP incremented by 1 +func NextIP(ip net.IP) net.IP { + i := ipToInt(ip) + return intToIP(i.Add(i, big.NewInt(1))) +} + +// PrevIP returns IP decremented by 1 +func PrevIP(ip net.IP) net.IP { + i := ipToInt(ip) + return intToIP(i.Sub(i, big.NewInt(1))) +} + +// Cmp compares two IPs, returning the usual ordering: +// a < b : -1 +// a == b : 0 +// a > b : 1 +func Cmp(a, b net.IP) int { + aa := ipToInt(a) + bb := ipToInt(b) + return aa.Cmp(bb) +} + +func ipToInt(ip net.IP) *big.Int { + if v := ip.To4(); v != nil { + return big.NewInt(0).SetBytes(v) + } + return big.NewInt(0).SetBytes(ip.To16()) +} + +func intToIP(i *big.Int) net.IP { + return net.IP(i.Bytes()) +} diff --git a/vendor/modules.txt b/vendor/modules.txt index 54d49db42..a09984ec0 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -110,6 +110,12 @@ github.com/containers/buildah/util ## explicit github.com/containers/common/libimage github.com/containers/common/libimage/manifests +github.com/containers/common/libnetwork/cni +github.com/containers/common/libnetwork/internal/util +github.com/containers/common/libnetwork/netavark +github.com/containers/common/libnetwork/network +github.com/containers/common/libnetwork/types +github.com/containers/common/libnetwork/util github.com/containers/common/pkg/apparmor github.com/containers/common/pkg/apparmor/internal/supported github.com/containers/common/pkg/auth |