github.com/rawahars/moby@v24.0.4+incompatible/opts/address_pools.go (about)

     1  package opts
     2  
     3  import (
     4  	"encoding/csv"
     5  	"encoding/json"
     6  	"fmt"
     7  	"strconv"
     8  	"strings"
     9  
    10  	types "github.com/docker/docker/libnetwork/ipamutils"
    11  )
    12  
    13  // PoolsOpt is a Value type for parsing the default address pools definitions
    14  type PoolsOpt struct {
    15  	Values []*types.NetworkToSplit
    16  }
    17  
    18  // UnmarshalJSON fills values structure  info from JSON input
    19  func (p *PoolsOpt) UnmarshalJSON(raw []byte) error {
    20  	return json.Unmarshal(raw, &(p.Values))
    21  }
    22  
    23  // Set predefined pools
    24  func (p *PoolsOpt) Set(value string) error {
    25  	csvReader := csv.NewReader(strings.NewReader(value))
    26  	fields, err := csvReader.Read()
    27  	if err != nil {
    28  		return err
    29  	}
    30  
    31  	poolsDef := types.NetworkToSplit{}
    32  
    33  	for _, field := range fields {
    34  		// TODO(thaJeztah): this should not be case-insensitive.
    35  		key, val, ok := strings.Cut(strings.ToLower(field), "=")
    36  		if !ok {
    37  			return fmt.Errorf("invalid field '%s' must be a key=value pair", field)
    38  		}
    39  
    40  		switch key {
    41  		case "base":
    42  			poolsDef.Base = val
    43  		case "size":
    44  			size, err := strconv.Atoi(val)
    45  			if err != nil {
    46  				return fmt.Errorf("invalid size value: %q (must be integer): %v", value, err)
    47  			}
    48  			poolsDef.Size = size
    49  		default:
    50  			return fmt.Errorf("unexpected key '%s' in '%s'", key, field)
    51  		}
    52  	}
    53  
    54  	p.Values = append(p.Values, &poolsDef)
    55  
    56  	return nil
    57  }
    58  
    59  // Type returns the type of this option
    60  func (p *PoolsOpt) Type() string {
    61  	return "pool-options"
    62  }
    63  
    64  // String returns a string repr of this option
    65  func (p *PoolsOpt) String() string {
    66  	var pools []string
    67  	for _, pool := range p.Values {
    68  		repr := fmt.Sprintf("%s %d", pool.Base, pool.Size)
    69  		pools = append(pools, repr)
    70  	}
    71  	return strings.Join(pools, ", ")
    72  }
    73  
    74  // Value returns the mounts
    75  func (p *PoolsOpt) Value() []*types.NetworkToSplit {
    76  	return p.Values
    77  }
    78  
    79  // Name returns the flag name of this option
    80  func (p *PoolsOpt) Name() string {
    81  	return "default-address-pools"
    82  }