1package pflag
2
3import (
4	"fmt"
5	"net"
6	"strings"
7)
8
9// IPNet adapts net.IPNet for use as a flag.
10type ipNetValue net.IPNet
11
12func (ipnet ipNetValue) String() string {
13	n := net.IPNet(ipnet)
14	return n.String()
15}
16
17func (ipnet *ipNetValue) Set(value string) error {
18	_, n, err := net.ParseCIDR(strings.TrimSpace(value))
19	if err != nil {
20		return err
21	}
22	*ipnet = ipNetValue(*n)
23	return nil
24}
25
26func (*ipNetValue) Type() string {
27	return "ipNet"
28}
29
30var _ = strings.TrimSpace
31
32func newIPNetValue(val net.IPNet, p *net.IPNet) *ipNetValue {
33	*p = val
34	return (*ipNetValue)(p)
35}
36
37func ipNetConv(sval string) (interface{}, error) {
38	_, n, err := net.ParseCIDR(strings.TrimSpace(sval))
39	if err == nil {
40		return *n, nil
41	}
42	return nil, fmt.Errorf("invalid string being converted to IPNet: %s", sval)
43}
44
45// GetIPNet return the net.IPNet value of a flag with the given name
46func (f *FlagSet) GetIPNet(name string) (net.IPNet, error) {
47	val, err := f.getFlagType(name, "ipNet", ipNetConv)
48	if err != nil {
49		return net.IPNet{}, err
50	}
51	return val.(net.IPNet), nil
52}
53
54// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
55// The argument p points to an net.IPNet variable in which to store the value of the flag.
56func (f *FlagSet) IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
57	f.VarP(newIPNetValue(value, p), name, "", usage)
58}
59
60// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
61func (f *FlagSet) IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
62	f.VarP(newIPNetValue(value, p), name, shorthand, usage)
63}
64
65// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
66// The argument p points to an net.IPNet variable in which to store the value of the flag.
67func IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
68	CommandLine.VarP(newIPNetValue(value, p), name, "", usage)
69}
70
71// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
72func IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
73	CommandLine.VarP(newIPNetValue(value, p), name, shorthand, usage)
74}
75
76// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
77// The return value is the address of an net.IPNet variable that stores the value of the flag.
78func (f *FlagSet) IPNet(name string, value net.IPNet, usage string) *net.IPNet {
79	p := new(net.IPNet)
80	f.IPNetVarP(p, name, "", value, usage)
81	return p
82}
83
84// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
85func (f *FlagSet) IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
86	p := new(net.IPNet)
87	f.IPNetVarP(p, name, shorthand, value, usage)
88	return p
89}
90
91// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
92// The return value is the address of an net.IPNet variable that stores the value of the flag.
93func IPNet(name string, value net.IPNet, usage string) *net.IPNet {
94	return CommandLine.IPNetP(name, "", value, usage)
95}
96
97// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
98func IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
99	return CommandLine.IPNetP(name, shorthand, value, usage)
100}
101