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package opts
import (
"encoding/csv"
"encoding/json"
"fmt"
"net/netip"
"strconv"
"strings"
"github.com/docker/docker/libnetwork/ipamutils"
)
// PoolsOpt is a Value type for parsing the default address pools definitions
type PoolsOpt struct {
Values []*ipamutils.NetworkToSplit
}
// UnmarshalJSON fills values structure info from JSON input
func (p *PoolsOpt) UnmarshalJSON(raw []byte) error {
return json.Unmarshal(raw, &(p.Values))
}
// Set predefined pools
func (p *PoolsOpt) Set(value string) error {
csvReader := csv.NewReader(strings.NewReader(value))
fields, err := csvReader.Read()
if err != nil {
return err
}
poolsDef := ipamutils.NetworkToSplit{}
for _, field := range fields {
// TODO(thaJeztah): this should not be case-insensitive.
key, val, ok := strings.Cut(strings.ToLower(field), "=")
if !ok {
return fmt.Errorf("invalid field '%s' must be a key=value pair", field)
}
switch key {
case "base":
base, err := netip.ParsePrefix(val)
if err != nil {
return fmt.Errorf("invalid base prefix %q: %w", val, err)
}
poolsDef.Base = base
case "size":
size, err := strconv.Atoi(val)
if err != nil {
return fmt.Errorf("invalid size value: %q (must be integer): %v", value, err)
}
poolsDef.Size = size
default:
return fmt.Errorf("unexpected key '%s' in '%s'", key, field)
}
}
p.Values = append(p.Values, &poolsDef)
return nil
}
// Type returns the type of this option
func (p *PoolsOpt) Type() string {
return "pool-options"
}
// String returns a string repr of this option
func (p *PoolsOpt) String() string {
var pools []string
for _, pool := range p.Values {
repr := fmt.Sprintf("%s %d", pool.Base, pool.Size)
pools = append(pools, repr)
}
return strings.Join(pools, ", ")
}
// Value returns the mounts
func (p *PoolsOpt) Value() []*ipamutils.NetworkToSplit {
return p.Values
}
// Name returns the flag name of this option
func (p *PoolsOpt) Name() string {
return "default-address-pools"
}
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