podman
1package pflag2
3import (4"fmt"5"net"6"strconv"7)
8
9// -- net.IPMask value
10type ipMaskValue net.IPMask11
12func newIPMaskValue(val net.IPMask, p *net.IPMask) *ipMaskValue {13*p = val14return (*ipMaskValue)(p)15}
16
17func (i *ipMaskValue) String() string { return net.IPMask(*i).String() }18func (i *ipMaskValue) Set(s string) error {19ip := ParseIPv4Mask(s)20if ip == nil {21return fmt.Errorf("failed to parse IP mask: %q", s)22}23*i = ipMaskValue(ip)24return nil25}
26
27func (i *ipMaskValue) Type() string {28return "ipMask"29}
30
31// ParseIPv4Mask written in IP form (e.g. 255.255.255.0).
32// This function should really belong to the net package.
33func ParseIPv4Mask(s string) net.IPMask {34mask := net.ParseIP(s)35if mask == nil {36if len(s) != 8 {37return nil38}39// net.IPMask.String() actually outputs things like ffffff0040// so write a horrible parser for that as well :-(41m := []int{}42for i := 0; i < 4; i++ {43b := "0x" + s[2*i:2*i+2]44d, err := strconv.ParseInt(b, 0, 0)45if err != nil {46return nil47}48m = append(m, int(d))49}50s := fmt.Sprintf("%d.%d.%d.%d", m[0], m[1], m[2], m[3])51mask = net.ParseIP(s)52if mask == nil {53return nil54}55}56return net.IPv4Mask(mask[12], mask[13], mask[14], mask[15])57}
58
59func parseIPv4Mask(sval string) (interface{}, error) {60mask := ParseIPv4Mask(sval)61if mask == nil {62return nil, fmt.Errorf("unable to parse %s as net.IPMask", sval)63}64return mask, nil65}
66
67// GetIPv4Mask return the net.IPv4Mask value of a flag with the given name
68func (f *FlagSet) GetIPv4Mask(name string) (net.IPMask, error) {69val, err := f.getFlagType(name, "ipMask", parseIPv4Mask)70if err != nil {71return nil, err72}73return val.(net.IPMask), nil74}
75
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.
78func (f *FlagSet) IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {79f.VarP(newIPMaskValue(value, p), name, "", usage)80}
81
82// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
83func (f *FlagSet) IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {84f.VarP(newIPMaskValue(value, p), name, shorthand, usage)85}
86
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.
89func IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {90CommandLine.VarP(newIPMaskValue(value, p), name, "", usage)91}
92
93// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
94func IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {95CommandLine.VarP(newIPMaskValue(value, p), name, shorthand, usage)96}
97
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.
100func (f *FlagSet) IPMask(name string, value net.IPMask, usage string) *net.IPMask {101p := new(net.IPMask)102f.IPMaskVarP(p, name, "", value, usage)103return p104}
105
106// IPMaskP is like IPMask, but accepts a shorthand letter that can be used after a single dash.
107func (f *FlagSet) IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {108p := new(net.IPMask)109f.IPMaskVarP(p, name, shorthand, value, usage)110return p111}
112
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.
115func IPMask(name string, value net.IPMask, usage string) *net.IPMask {116return CommandLine.IPMaskP(name, "", value, usage)117}
118
119// IPMaskP is like IP, but accepts a shorthand letter that can be used after a single dash.
120func IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {121return CommandLine.IPMaskP(name, shorthand, value, usage)122}
123