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author | Matthew Heon <matthew.heon@gmail.com> | 2017-11-01 11:24:59 -0400 |
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committer | Matthew Heon <matthew.heon@gmail.com> | 2017-11-01 11:24:59 -0400 |
commit | a031b83a09a8628435317a03f199cdc18b78262f (patch) | |
tree | bc017a96769ce6de33745b8b0b1304ccf38e9df0 /vendor/github.com/containernetworking/cni/libcni/api.go | |
parent | 2b74391cd5281f6fdf391ff8ad50fd1490f6bf89 (diff) | |
download | podman-a031b83a09a8628435317a03f199cdc18b78262f.tar.gz podman-a031b83a09a8628435317a03f199cdc18b78262f.tar.bz2 podman-a031b83a09a8628435317a03f199cdc18b78262f.zip |
Initial checkin from CRI-O repo
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Diffstat (limited to 'vendor/github.com/containernetworking/cni/libcni/api.go')
-rw-r--r-- | vendor/github.com/containernetworking/cni/libcni/api.go | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/vendor/github.com/containernetworking/cni/libcni/api.go b/vendor/github.com/containernetworking/cni/libcni/api.go new file mode 100644 index 000000000..a23cbb2c5 --- /dev/null +++ b/vendor/github.com/containernetworking/cni/libcni/api.go @@ -0,0 +1,219 @@ +// 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 libcni + +import ( + "os" + "strings" + + "github.com/containernetworking/cni/pkg/invoke" + "github.com/containernetworking/cni/pkg/types" + "github.com/containernetworking/cni/pkg/version" +) + +type RuntimeConf struct { + ContainerID string + NetNS string + IfName string + Args [][2]string + // A dictionary of capability-specific data passed by the runtime + // to plugins as top-level keys in the 'runtimeConfig' dictionary + // of the plugin's stdin data. libcni will ensure that only keys + // in this map which match the capabilities of the plugin are passed + // to the plugin + CapabilityArgs map[string]interface{} +} + +type NetworkConfig struct { + Network *types.NetConf + Bytes []byte +} + +type NetworkConfigList struct { + Name string + CNIVersion string + Plugins []*NetworkConfig + Bytes []byte +} + +type CNI interface { + AddNetworkList(net *NetworkConfigList, rt *RuntimeConf) (types.Result, error) + DelNetworkList(net *NetworkConfigList, rt *RuntimeConf) error + + AddNetwork(net *NetworkConfig, rt *RuntimeConf) (types.Result, error) + DelNetwork(net *NetworkConfig, rt *RuntimeConf) error +} + +type CNIConfig struct { + Path []string +} + +// CNIConfig implements the CNI interface +var _ CNI = &CNIConfig{} + +func buildOneConfig(list *NetworkConfigList, orig *NetworkConfig, prevResult types.Result, rt *RuntimeConf) (*NetworkConfig, error) { + var err error + + inject := map[string]interface{}{ + "name": list.Name, + "cniVersion": list.CNIVersion, + } + // Add previous plugin result + if prevResult != nil { + inject["prevResult"] = prevResult + } + + // Ensure every config uses the same name and version + orig, err = InjectConf(orig, inject) + if err != nil { + return nil, err + } + + return injectRuntimeConfig(orig, rt) +} + +// This function takes a libcni RuntimeConf structure and injects values into +// a "runtimeConfig" dictionary in the CNI network configuration JSON that +// will be passed to the plugin on stdin. +// +// Only "capabilities arguments" passed by the runtime are currently injected. +// These capabilities arguments are filtered through the plugin's advertised +// capabilities from its config JSON, and any keys in the CapabilityArgs +// matching plugin capabilities are added to the "runtimeConfig" dictionary +// sent to the plugin via JSON on stdin. For exmaple, if the plugin's +// capabilities include "portMappings", and the CapabilityArgs map includes a +// "portMappings" key, that key and its value are added to the "runtimeConfig" +// dictionary to be passed to the plugin's stdin. +func injectRuntimeConfig(orig *NetworkConfig, rt *RuntimeConf) (*NetworkConfig, error) { + var err error + + rc := make(map[string]interface{}) + for capability, supported := range orig.Network.Capabilities { + if !supported { + continue + } + if data, ok := rt.CapabilityArgs[capability]; ok { + rc[capability] = data + } + } + + if len(rc) > 0 { + orig, err = InjectConf(orig, map[string]interface{}{"runtimeConfig": rc}) + if err != nil { + return nil, err + } + } + + return orig, nil +} + +// AddNetworkList executes a sequence of plugins with the ADD command +func (c *CNIConfig) AddNetworkList(list *NetworkConfigList, rt *RuntimeConf) (types.Result, error) { + var prevResult types.Result + for _, net := range list.Plugins { + pluginPath, err := invoke.FindInPath(net.Network.Type, c.Path) + if err != nil { + return nil, err + } + + newConf, err := buildOneConfig(list, net, prevResult, rt) + if err != nil { + return nil, err + } + + prevResult, err = invoke.ExecPluginWithResult(pluginPath, newConf.Bytes, c.args("ADD", rt)) + if err != nil { + return nil, err + } + } + + return prevResult, nil +} + +// DelNetworkList executes a sequence of plugins with the DEL command +func (c *CNIConfig) DelNetworkList(list *NetworkConfigList, rt *RuntimeConf) error { + for i := len(list.Plugins) - 1; i >= 0; i-- { + net := list.Plugins[i] + + pluginPath, err := invoke.FindInPath(net.Network.Type, c.Path) + if err != nil { + return err + } + + newConf, err := buildOneConfig(list, net, nil, rt) + if err != nil { + return err + } + + if err := invoke.ExecPluginWithoutResult(pluginPath, newConf.Bytes, c.args("DEL", rt)); err != nil { + return err + } + } + + return nil +} + +// AddNetwork executes the plugin with the ADD command +func (c *CNIConfig) AddNetwork(net *NetworkConfig, rt *RuntimeConf) (types.Result, error) { + pluginPath, err := invoke.FindInPath(net.Network.Type, c.Path) + if err != nil { + return nil, err + } + + net, err = injectRuntimeConfig(net, rt) + if err != nil { + return nil, err + } + + return invoke.ExecPluginWithResult(pluginPath, net.Bytes, c.args("ADD", rt)) +} + +// DelNetwork executes the plugin with the DEL command +func (c *CNIConfig) DelNetwork(net *NetworkConfig, rt *RuntimeConf) error { + pluginPath, err := invoke.FindInPath(net.Network.Type, c.Path) + if err != nil { + return err + } + + net, err = injectRuntimeConfig(net, rt) + if err != nil { + return err + } + + return invoke.ExecPluginWithoutResult(pluginPath, net.Bytes, c.args("DEL", rt)) +} + +// GetVersionInfo reports which versions of the CNI spec are supported by +// the given plugin. +func (c *CNIConfig) GetVersionInfo(pluginType string) (version.PluginInfo, error) { + pluginPath, err := invoke.FindInPath(pluginType, c.Path) + if err != nil { + return nil, err + } + + return invoke.GetVersionInfo(pluginPath) +} + +// ===== +func (c *CNIConfig) args(action string, rt *RuntimeConf) *invoke.Args { + return &invoke.Args{ + Command: action, + ContainerID: rt.ContainerID, + NetNS: rt.NetNS, + PluginArgs: rt.Args, + IfName: rt.IfName, + Path: strings.Join(c.Path, string(os.PathListSeparator)), + } +} |