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package cni
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net"
"net/http"
"os"
"ovn4nfv-k8s-plugin/internal/pkg/cniserver"
"ovn4nfv-k8s-plugin/internal/pkg/config"
"strings"
"github.com/containernetworking/cni/pkg/skel"
"github.com/containernetworking/cni/pkg/types"
"github.com/containernetworking/cni/pkg/types/current"
"github.com/sirupsen/logrus"
)
const CNIEndpointURLReq string = "http://dummy/"
type Endpoint struct {
cniServerSocketPath string
}
func CNIEndpoint(cniServerSocketPath string) *Endpoint {
if len(cniServerSocketPath) == 0 {
cniServerSocketPath = cniserver.CNIServerSocketPath
}
return &Endpoint{cniServerSocketPath: cniServerSocketPath}
}
func cniEndpointRequest(args *skel.CmdArgs) *cniserver.CNIEndpointRequest {
osEnvMap := make(map[string]string)
for _, item := range os.Environ() {
idx := strings.Index(item, "=")
if idx > 0 {
osEnvMap[strings.TrimSpace(item[:idx])] = item[idx+1:]
}
}
return &cniserver.CNIEndpointRequest{
ArgEnv: osEnvMap,
NetConfig: args.StdinData,
}
}
func (ep *Endpoint) sendCNIServerReq(req *cniserver.CNIEndpointRequest) ([]byte, error) {
cnireqdata, err := json.Marshal(req)
if err != nil {
return nil, fmt.Errorf("sendCNIServerReq: failed to Marshal CNIShim Req %v:%v", req, err)
}
httpc := http.Client{
Transport: &http.Transport{
Dial: func(proto, addr string) (net.Conn, error) {
return net.Dial("unix", ep.cniServerSocketPath)
},
},
}
reponse, err := httpc.Post(CNIEndpointURLReq, "application/json", bytes.NewReader(cnireqdata))
if err != nil {
return nil, fmt.Errorf("Failed to send CNIServer request: %v", err)
}
defer reponse.Body.Close()
rbody, err := ioutil.ReadAll(reponse.Body)
if err != nil {
return nil, fmt.Errorf("Failed to read the CNI Server reponse:%v", err)
}
if reponse.StatusCode != 200 {
return nil, fmt.Errorf("CNI Server request is failed with reponse status %v and reponse body %s", reponse.StatusCode, string(rbody))
}
return rbody, nil
}
func (ep *Endpoint) CmdAdd(args *skel.CmdArgs) error {
logrus.Infof("ovn4nfvk8s-cni: cmdAdd ")
conf, err := config.ConfigureNetConf(args.StdinData)
if err != nil {
return fmt.Errorf("invalid stdin args")
}
logrus.Infof("ovn4nfvk8s-cni: cmdAdd configure net conf details -%+v", conf)
req := cniEndpointRequest(args)
logrus.Infof("ovn4nfvk8s-cni: cmdAdd CNIEndpoint Request:%+v",req)
reponsebody, err := ep.sendCNIServerReq(req)
if err != nil {
return err
}
result, err := current.NewResult(reponsebody)
if err != nil {
return fmt.Errorf("failed to unmarshall CNIServer Result reponse %v - err:%v", string(reponsebody), err)
}
return types.PrintResult(result, conf.CNIVersion)
}
func (ep *Endpoint) CmdCheck(args *skel.CmdArgs) error {
return nil
}
func (ep *Endpoint) CmdDel(args *skel.CmdArgs) error {
logrus.Infof("ovn4nfvk8s-cni: cmdDel ")
req := cniEndpointRequest(args)
_, err := ep.sendCNIServerReq(req)
return err
}
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