diff --git a/go.mod b/go.mod index 4693f9017..ef3591083 100644 --- a/go.mod +++ b/go.mod @@ -12,7 +12,7 @@ require ( github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190329064014-6e358769c32a github.com/aliyun/aliyun-oss-go-sdk v0.0.0-20190103054945-8205d1f41e70 github.com/aliyun/aliyun-tablestore-go-sdk v4.1.2+incompatible - github.com/apparentlymart/go-cidr v1.0.1 + github.com/apparentlymart/go-cidr v1.1.0 github.com/apparentlymart/go-dump v0.0.0-20190214190832-042adf3cf4a0 github.com/apparentlymart/go-userdirs v0.0.0-20190512014041-4a23807e62b9 github.com/apparentlymart/go-versions v1.0.0 diff --git a/go.sum b/go.sum index 9fb02f610..17ce1fa18 100644 --- a/go.sum +++ b/go.sum @@ -76,6 +76,8 @@ github.com/antchfx/xquery v0.0.0-20180515051857-ad5b8c7a47b0 h1:JaCC8jz0zdMLk2m+ github.com/antchfx/xquery v0.0.0-20180515051857-ad5b8c7a47b0/go.mod h1:LzD22aAzDP8/dyiCKFp31He4m2GPjl0AFyzDtZzUu9M= github.com/apparentlymart/go-cidr v1.0.1 h1:NmIwLZ/KdsjIUlhf+/Np40atNXm/+lZ5txfTJ/SpF+U= github.com/apparentlymart/go-cidr v1.0.1/go.mod h1:EBcsNrHc3zQeuaeCeCtQruQm+n9/YjEn/vI25Lg7Gwc= +github.com/apparentlymart/go-cidr v1.1.0 h1:2mAhrMoF+nhXqxTzSZMUzDHkLjmIHC+Zzn4tdgBZjnU= +github.com/apparentlymart/go-cidr v1.1.0/go.mod h1:EBcsNrHc3zQeuaeCeCtQruQm+n9/YjEn/vI25Lg7Gwc= github.com/apparentlymart/go-dump v0.0.0-20180507223929-23540a00eaa3/go.mod h1:oL81AME2rN47vu18xqj1S1jPIPuN7afo62yKTNn3XMM= github.com/apparentlymart/go-dump v0.0.0-20190214190832-042adf3cf4a0 h1:MzVXffFUye+ZcSR6opIgz9Co7WcDx6ZcY+RjfFHoA0I= github.com/apparentlymart/go-dump v0.0.0-20190214190832-042adf3cf4a0/go.mod h1:oL81AME2rN47vu18xqj1S1jPIPuN7afo62yKTNn3XMM= diff --git a/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go b/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go index ed749d4c5..20823af04 100644 --- a/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go +++ b/vendor/github.com/apparentlymart/go-cidr/cidr/cidr.go @@ -28,6 +28,16 @@ import ( // For example, 10.3.0.0/16, extended by 8 bits, with a network number // of 5, becomes 10.3.5.0/24 . func Subnet(base *net.IPNet, newBits int, num int) (*net.IPNet, error) { + return SubnetBig(base, newBits, big.NewInt(int64(num))) +} + +// SubnetBig takes a parent CIDR range and creates a subnet within it with the +// given number of additional prefix bits and the given network number. It +// differs from Subnet in that it takes a *big.Int for the num, instead of an int. +// +// For example, 10.3.0.0/16, extended by 8 bits, with a network number of 5, +// becomes 10.3.5.0/24 . +func SubnetBig(base *net.IPNet, newBits int, num *big.Int) (*net.IPNet, error) { ip := base.IP mask := base.Mask @@ -39,24 +49,32 @@ func Subnet(base *net.IPNet, newBits int, num int) (*net.IPNet, error) { } maxNetNum := uint64(1< maxNetNum { + if num.Uint64() > maxNetNum { return nil, fmt.Errorf("prefix extension of %d does not accommodate a subnet numbered %d", newBits, num) } return &net.IPNet{ - IP: insertNumIntoIP(ip, big.NewInt(int64(num)), newPrefixLen), + IP: insertNumIntoIP(ip, num, newPrefixLen), Mask: net.CIDRMask(newPrefixLen, addrLen), }, nil } -// Host takes a parent CIDR range and turns it into a host IP address with -// the given host number. +// Host takes a parent CIDR range and turns it into a host IP address with the +// given host number. // // For example, 10.3.0.0/16 with a host number of 2 gives 10.3.0.2. func Host(base *net.IPNet, num int) (net.IP, error) { + return HostBig(base, big.NewInt(int64(num))) +} + +// HostBig takes a parent CIDR range and turns it into a host IP address with +// the given host number. It differs from Host in that it takes a *big.Int for +// the num, instead of an int. +// +// For example, 10.3.0.0/16 with a host number of 2 gives 10.3.0.2. +func HostBig(base *net.IPNet, num *big.Int) (net.IP, error) { ip := base.IP mask := base.Mask - bigNum := big.NewInt(int64(num)) parentLen, addrLen := mask.Size() hostLen := addrLen - parentLen @@ -65,11 +83,11 @@ func Host(base *net.IPNet, num int) (net.IP, error) { maxHostNum.Lsh(maxHostNum, uint(hostLen)) maxHostNum.Sub(maxHostNum, big.NewInt(1)) - numUint64 := big.NewInt(int64(bigNum.Uint64())) - if bigNum.Cmp(big.NewInt(0)) == -1 { - numUint64.Neg(bigNum) + numUint64 := big.NewInt(int64(num.Uint64())) + if num.Cmp(big.NewInt(0)) == -1 { + numUint64.Neg(num) numUint64.Sub(numUint64, big.NewInt(int64(1))) - bigNum.Sub(maxHostNum, numUint64) + num.Sub(maxHostNum, numUint64) } if numUint64.Cmp(maxHostNum) == 1 { @@ -81,7 +99,7 @@ func Host(base *net.IPNet, num int) (net.IP, error) { } else { bitlength = 128 } - return insertNumIntoIP(ip, bigNum, bitlength), nil + return insertNumIntoIP(ip, num, bitlength), nil } // AddressRange returns the first and last addresses in the given CIDR range. diff --git a/vendor/modules.txt b/vendor/modules.txt index 9a8efeddf..4e7b4f2d5 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -87,7 +87,7 @@ github.com/aliyun/aliyun-tablestore-go-sdk/tablestore/search github.com/antchfx/xpath # github.com/antchfx/xquery v0.0.0-20180515051857-ad5b8c7a47b0 github.com/antchfx/xquery/xml -# github.com/apparentlymart/go-cidr v1.0.1 +# github.com/apparentlymart/go-cidr v1.1.0 ## explicit github.com/apparentlymart/go-cidr/cidr # github.com/apparentlymart/go-dump v0.0.0-20190214190832-042adf3cf4a0