10 type ipMaskValue net.IPMask
12 func newIPMaskValue(val net.IPMask, p *net.IPMask) *ipMaskValue {
14 return (*ipMaskValue)(p)
17 func (i *ipMaskValue) String() string { return net.IPMask(*i).String() }
18 func (i *ipMaskValue) Set(s string) error {
19 ip := ParseIPv4Mask(s)
21 return fmt.Errorf("failed to parse IP mask: %q", s)
27 func (i *ipMaskValue) Type() string {
31 // ParseIPv4Mask written in IP form (e.g. 255.255.255.0).
32 // This function should really belong to the net package.
33 func ParseIPv4Mask(s string) net.IPMask {
34 mask := net.ParseIP(s)
39 // net.IPMask.String() actually outputs things like ffffff00
40 // so write a horrible parser for that as well :-(
42 for i := 0; i < 4; i++ {
43 b := "0x" + s[2*i:2*i+2]
44 d, err := strconv.ParseInt(b, 0, 0)
50 s := fmt.Sprintf("%d.%d.%d.%d", m[0], m[1], m[2], m[3])
56 return net.IPv4Mask(mask[12], mask[13], mask[14], mask[15])
59 func parseIPv4Mask(sval string) (interface{}, error) {
60 mask := ParseIPv4Mask(sval)
62 return nil, fmt.Errorf("unable to parse %s as net.IPMask", sval)
67 // GetIPv4Mask return the net.IPv4Mask value of a flag with the given name
68 func (f *FlagSet) GetIPv4Mask(name string) (net.IPMask, error) {
69 val, err := f.getFlagType(name, "ipMask", parseIPv4Mask)
73 return val.(net.IPMask), nil
76 // IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
77 // The argument p points to an net.IPMask variable in which to store the value of the flag.
78 func (f *FlagSet) IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
79 f.VarP(newIPMaskValue(value, p), name, "", usage)
82 // IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
83 func (f *FlagSet) IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
84 f.VarP(newIPMaskValue(value, p), name, shorthand, usage)
87 // IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
88 // The argument p points to an net.IPMask variable in which to store the value of the flag.
89 func IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
90 CommandLine.VarP(newIPMaskValue(value, p), name, "", usage)
93 // IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
94 func IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
95 CommandLine.VarP(newIPMaskValue(value, p), name, shorthand, usage)
98 // IPMask defines an net.IPMask flag with specified name, default value, and usage string.
99 // The return value is the address of an net.IPMask variable that stores the value of the flag.
100 func (f *FlagSet) IPMask(name string, value net.IPMask, usage string) *net.IPMask {
102 f.IPMaskVarP(p, name, "", value, usage)
106 // IPMaskP is like IPMask, but accepts a shorthand letter that can be used after a single dash.
107 func (f *FlagSet) IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
109 f.IPMaskVarP(p, name, shorthand, value, usage)
113 // IPMask defines an net.IPMask flag with specified name, default value, and usage string.
114 // The return value is the address of an net.IPMask variable that stores the value of the flag.
115 func IPMask(name string, value net.IPMask, usage string) *net.IPMask {
116 return CommandLine.IPMaskP(name, "", value, usage)
119 // IPMaskP is like IP, but accepts a shorthand letter that can be used after a single dash.
120 func IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
121 return CommandLine.IPMaskP(name, shorthand, value, usage)