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Kent Hagermane566c2e2019-06-03 17:56:42 -04001package 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
30func newIPNetValue(val net.IPNet, p *net.IPNet) *ipNetValue {
31 *p = val
32 return (*ipNetValue)(p)
33}
34
35func ipNetConv(sval string) (interface{}, error) {
36 _, n, err := net.ParseCIDR(strings.TrimSpace(sval))
37 if err == nil {
38 return *n, nil
39 }
40 return nil, fmt.Errorf("invalid string being converted to IPNet: %s", sval)
41}
42
43// GetIPNet return the net.IPNet value of a flag with the given name
44func (f *FlagSet) GetIPNet(name string) (net.IPNet, error) {
45 val, err := f.getFlagType(name, "ipNet", ipNetConv)
46 if err != nil {
47 return net.IPNet{}, err
48 }
49 return val.(net.IPNet), nil
50}
51
52// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
53// The argument p points to an net.IPNet variable in which to store the value of the flag.
54func (f *FlagSet) IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
55 f.VarP(newIPNetValue(value, p), name, "", usage)
56}
57
58// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
59func (f *FlagSet) IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
60 f.VarP(newIPNetValue(value, p), name, shorthand, usage)
61}
62
63// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
64// The argument p points to an net.IPNet variable in which to store the value of the flag.
65func IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
66 CommandLine.VarP(newIPNetValue(value, p), name, "", usage)
67}
68
69// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
70func IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
71 CommandLine.VarP(newIPNetValue(value, p), name, shorthand, usage)
72}
73
74// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
75// The return value is the address of an net.IPNet variable that stores the value of the flag.
76func (f *FlagSet) IPNet(name string, value net.IPNet, usage string) *net.IPNet {
77 p := new(net.IPNet)
78 f.IPNetVarP(p, name, "", value, usage)
79 return p
80}
81
82// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
83func (f *FlagSet) IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
84 p := new(net.IPNet)
85 f.IPNetVarP(p, name, shorthand, value, usage)
86 return p
87}
88
89// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
90// The return value is the address of an net.IPNet variable that stores the value of the flag.
91func IPNet(name string, value net.IPNet, usage string) *net.IPNet {
92 return CommandLine.IPNetP(name, "", value, usage)
93}
94
95// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
96func IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
97 return CommandLine.IPNetP(name, shorthand, value, usage)
98}