github.com/fafucoder/cilium@v1.6.11/cilium/cmd/prefilter_update.go (about)

     1  // Copyright 2017 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package cmd
    16  
    17  import (
    18  	"fmt"
    19  	"net"
    20  
    21  	"github.com/cilium/cilium/api/v1/models"
    22  
    23  	"github.com/spf13/cobra"
    24  )
    25  
    26  var (
    27  	revision uint64
    28  	cidrs    []string
    29  )
    30  
    31  var preFilterUpdateCmd = &cobra.Command{
    32  	Use:   "update",
    33  	Short: "Update CIDR filters",
    34  	Run: func(cmd *cobra.Command, args []string) {
    35  		updateFilters(cmd, args)
    36  	},
    37  }
    38  
    39  func init() {
    40  	preFilterCmd.AddCommand(preFilterUpdateCmd)
    41  	preFilterUpdateCmd.Flags().Uint64VarP(&revision, "revision", "", 0, "Update revision")
    42  	preFilterUpdateCmd.Flags().StringSliceVarP(&cidrs, "cidr", "", []string{}, "List of CIDR prefixes to block")
    43  }
    44  
    45  func updateFilters(cmd *cobra.Command, args []string) {
    46  	spec := &models.PrefilterSpec{
    47  		Revision: int64(revision),
    48  		Deny:     cidrs,
    49  	}
    50  	for _, cidr := range cidrs {
    51  		_, _, err := net.ParseCIDR(cidr)
    52  		if err != nil {
    53  			Fatalf("Cannot parse CIDR \"%s\": %s", cidr, err)
    54  		}
    55  	}
    56  	if _, err := client.PatchPrefilter(spec); err != nil {
    57  		Fatalf("Cannot add/update prefilter: %s", err)
    58  	} else {
    59  		fmt.Printf("Updated %d prefilter entries\n", len(spec.Deny))
    60  	}
    61  }