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