initial changes for azure-ipam V6 routing

Author: rjdenney

azure-ipam/ipam.go

@@ -81,7 +81,7 @@ func (p *IPAMPlugin) CmdAdd(args *cniSkel.CmdArgs) error {
 	p.logger.Debug("Making request to CNS")
 	// if this fails, the caller plugin should execute again with cmdDel before returning error.
 	// https://www.cni.dev/docs/spec/#delegated-plugin-execution-procedure
-	resp, err := p.cnsClient.RequestIPs(context.TODO(), req)
+	resp, err := p.cnsClient.RequestIPs(context.TODO(), req) // need to add interfaces to this response
 	if err != nil {
 		if cnscli.IsUnsupportedAPI(err) {
 			p.logger.Error("Failed to request IPs using RequestIPs from CNS, going to try RequestIPAddress", zap.Error(err), zap.Any("request", req))
@@ -113,9 +113,10 @@ func (p *IPAMPlugin) CmdAdd(args *cniSkel.CmdArgs) error {
 		}
 	}
 	p.logger.Debug("Received CNS IP config response", zap.Any("response", resp))
+	// resp.PodIPInfo
 
 	// Get Pod IP and gateway IP from ip config response
-	podIPNet, err := ipconfig.ProcessIPConfigsResp(resp)
+	podIPNet, gatewayIP, err := ipconfig.ProcessIPConfigsResp(resp) // need to get interfaces out of the response and add it here
 	if err != nil {
 		p.logger.Error("Failed to interpret CNS IPConfigResponse", zap.Error(err), zap.Any("response", resp))
 		return cniTypes.NewError(ErrProcessIPConfigResponse, err.Error(), "failed to interpret CNS IPConfigResponse")
@@ -130,14 +131,24 @@ func (p *IPAMPlugin) CmdAdd(args *cniSkel.CmdArgs) error {
 				IP:   net.ParseIP(ipNet.Addr().String()),
 				Mask: net.CIDRMask(ipNet.Bits(), 32), // nolint
 			}
+			ipConfig.Gateway = (*gatewayIP)[i]
 		} else {
 			ipConfig.Address = net.IPNet{
 				IP:   net.ParseIP(ipNet.Addr().String()),
 				Mask: net.CIDRMask(ipNet.Bits(), 128), // nolint
 			}
+			ipConfig.Gateway = net.ParseIP("fd00:aec6:6946:1::")
 		}
 		cniResult.IPs[i] = ipConfig
 	}
+	cniResult.Interfaces = make([]*types100.Interface, 1)
+	interface_test := &types100.Interface{
+		Name: "eth1",
+		Mac:  "00:0D:3A:FE:1E:B2",
+	}
+	cniResult.Interfaces[0] = interface_test
+
+	p.logger.Info("Created CNIResult:", zap.Any("result", cniResult))
 
 	// Get versioned result
 	versionedCniResult, err := cniResult.GetAsVersion(nwCfg.CNIVersion)

azure-ipam/ipconfig/ipconfig.go

@@ -3,6 +3,7 @@ package ipconfig
 import (
 	"encoding/json"
 	"fmt"
+	"net"
 	"net/netip"
 
 	"github.com/Azure/azure-container-networking/cns"
@@ -63,8 +64,9 @@ func CreateIPConfigsReq(args *cniSkel.CmdArgs) (cns.IPConfigsRequest, error) {
 	return req, nil
 }
 
-func ProcessIPConfigsResp(resp *cns.IPConfigsResponse) (*[]netip.Prefix, error) {
+func ProcessIPConfigsResp(resp *cns.IPConfigsResponse) (*[]netip.Prefix, *[]net.IP, error) {
 	podIPNets := make([]netip.Prefix, len(resp.PodIPInfo))
+	gatewaysIPs := make([]net.IP, len(resp.PodIPInfo))
 
 	for i := range resp.PodIPInfo {
 		podCIDR := fmt.Sprintf(
@@ -74,12 +76,14 @@ func ProcessIPConfigsResp(resp *cns.IPConfigsResponse) (*[]netip.Prefix, error)
 		)
 		podIPNet, err := netip.ParsePrefix(podCIDR)
 		if err != nil {
-			return nil, errors.Wrapf(err, "cns returned invalid pod CIDR %q", podCIDR)
+			return nil, nil, errors.Wrapf(err, "cns returned invalid pod CIDR %q", podCIDR)
 		}
 		podIPNets[i] = podIPNet
+		gatewayIP := net.ParseIP(resp.PodIPInfo[i].NetworkContainerPrimaryIPConfig.GatewayIPAddress)
+		gatewaysIPs[i] = gatewayIP
 	}
 
-	return &podIPNets, nil
+	return &podIPNets, &gatewaysIPs, nil
 }
 
 type k8sPodEnvArgs struct {

cns/restserver/util.go

@@ -846,7 +846,7 @@ func (service *HTTPRestService) populateIPConfigInfoUntransacted(ipConfigStatus
 	podIPInfo.HostPrimaryIPInfo.Subnet = primaryHostInterface.Subnet
 	podIPInfo.HostPrimaryIPInfo.Gateway = primaryHostInterface.Gateway
 	podIPInfo.NICType = cns.InfraNIC
-
+	fmt.Printf("podIPInfo after adding interface: %+v", podIPInfo)
 	return nil
 }