diff options
Diffstat (limited to 'src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net')
7 files changed, 870 insertions, 0 deletions
diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/http.go b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/http.go new file mode 100644 index 0000000..582fb9a --- /dev/null +++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/http.go @@ -0,0 +1,235 @@ +/* +Copyright 2016 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package net + +import ( + "crypto/tls" + "fmt" + "io" + "net" + "net/http" + "net/url" + "os" + "strconv" + "strings" + + "github.com/golang/glog" + "golang.org/x/net/http2" +) + +// IsProbableEOF returns true if the given error resembles a connection termination +// scenario that would justify assuming that the watch is empty. +// These errors are what the Go http stack returns back to us which are general +// connection closure errors (strongly correlated) and callers that need to +// differentiate probable errors in connection behavior between normal "this is +// disconnected" should use the method. +func IsProbableEOF(err error) bool { + if uerr, ok := err.(*url.Error); ok { + err = uerr.Err + } + switch { + case err == io.EOF: + return true + case err.Error() == "http: can't write HTTP request on broken connection": + return true + case strings.Contains(err.Error(), "connection reset by peer"): + return true + case strings.Contains(strings.ToLower(err.Error()), "use of closed network connection"): + return true + } + return false +} + +var defaultTransport = http.DefaultTransport.(*http.Transport) + +// SetOldTransportDefaults applies the defaults from http.DefaultTransport +// for the Proxy, Dial, and TLSHandshakeTimeout fields if unset +func SetOldTransportDefaults(t *http.Transport) *http.Transport { + if t.Proxy == nil || isDefault(t.Proxy) { + // http.ProxyFromEnvironment doesn't respect CIDRs and that makes it impossible to exclude things like pod and service IPs from proxy settings + // ProxierWithNoProxyCIDR allows CIDR rules in NO_PROXY + t.Proxy = NewProxierWithNoProxyCIDR(http.ProxyFromEnvironment) + } + if t.Dial == nil { + t.Dial = defaultTransport.Dial + } + if t.TLSHandshakeTimeout == 0 { + t.TLSHandshakeTimeout = defaultTransport.TLSHandshakeTimeout + } + return t +} + +// SetTransportDefaults applies the defaults from http.DefaultTransport +// for the Proxy, Dial, and TLSHandshakeTimeout fields if unset +func SetTransportDefaults(t *http.Transport) *http.Transport { + t = SetOldTransportDefaults(t) + // Allow clients to disable http2 if needed. + if s := os.Getenv("DISABLE_HTTP2"); len(s) > 0 { + glog.Infof("HTTP2 has been explicitly disabled") + } else { + if err := http2.ConfigureTransport(t); err != nil { + glog.Warningf("Transport failed http2 configuration: %v", err) + } + } + return t +} + +type RoundTripperWrapper interface { + http.RoundTripper + WrappedRoundTripper() http.RoundTripper +} + +type DialFunc func(net, addr string) (net.Conn, error) + +func Dialer(transport http.RoundTripper) (DialFunc, error) { + if transport == nil { + return nil, nil + } + + switch transport := transport.(type) { + case *http.Transport: + return transport.Dial, nil + case RoundTripperWrapper: + return Dialer(transport.WrappedRoundTripper()) + default: + return nil, fmt.Errorf("unknown transport type: %v", transport) + } +} + +func TLSClientConfig(transport http.RoundTripper) (*tls.Config, error) { + if transport == nil { + return nil, nil + } + + switch transport := transport.(type) { + case *http.Transport: + return transport.TLSClientConfig, nil + case RoundTripperWrapper: + return TLSClientConfig(transport.WrappedRoundTripper()) + default: + return nil, fmt.Errorf("unknown transport type: %v", transport) + } +} + +func FormatURL(scheme string, host string, port int, path string) *url.URL { + return &url.URL{ + Scheme: scheme, + Host: net.JoinHostPort(host, strconv.Itoa(port)), + Path: path, + } +} + +func GetHTTPClient(req *http.Request) string { + if userAgent, ok := req.Header["User-Agent"]; ok { + if len(userAgent) > 0 { + return userAgent[0] + } + } + return "unknown" +} + +// Extracts and returns the clients IP from the given request. +// Looks at X-Forwarded-For header, X-Real-Ip header and request.RemoteAddr in that order. +// Returns nil if none of them are set or is set to an invalid value. +func GetClientIP(req *http.Request) net.IP { + hdr := req.Header + // First check the X-Forwarded-For header for requests via proxy. + hdrForwardedFor := hdr.Get("X-Forwarded-For") + if hdrForwardedFor != "" { + // X-Forwarded-For can be a csv of IPs in case of multiple proxies. + // Use the first valid one. + parts := strings.Split(hdrForwardedFor, ",") + for _, part := range parts { + ip := net.ParseIP(strings.TrimSpace(part)) + if ip != nil { + return ip + } + } + } + + // Try the X-Real-Ip header. + hdrRealIp := hdr.Get("X-Real-Ip") + if hdrRealIp != "" { + ip := net.ParseIP(hdrRealIp) + if ip != nil { + return ip + } + } + + // Fallback to Remote Address in request, which will give the correct client IP when there is no proxy. + // Remote Address in Go's HTTP server is in the form host:port so we need to split that first. + host, _, err := net.SplitHostPort(req.RemoteAddr) + if err == nil { + return net.ParseIP(host) + } + + // Fallback if Remote Address was just IP. + return net.ParseIP(req.RemoteAddr) +} + +var defaultProxyFuncPointer = fmt.Sprintf("%p", http.ProxyFromEnvironment) + +// isDefault checks to see if the transportProxierFunc is pointing to the default one +func isDefault(transportProxier func(*http.Request) (*url.URL, error)) bool { + transportProxierPointer := fmt.Sprintf("%p", transportProxier) + return transportProxierPointer == defaultProxyFuncPointer +} + +// NewProxierWithNoProxyCIDR constructs a Proxier function that respects CIDRs in NO_PROXY and delegates if +// no matching CIDRs are found +func NewProxierWithNoProxyCIDR(delegate func(req *http.Request) (*url.URL, error)) func(req *http.Request) (*url.URL, error) { + // we wrap the default method, so we only need to perform our check if the NO_PROXY envvar has a CIDR in it + noProxyEnv := os.Getenv("NO_PROXY") + noProxyRules := strings.Split(noProxyEnv, ",") + + cidrs := []*net.IPNet{} + for _, noProxyRule := range noProxyRules { + _, cidr, _ := net.ParseCIDR(noProxyRule) + if cidr != nil { + cidrs = append(cidrs, cidr) + } + } + + if len(cidrs) == 0 { + return delegate + } + + return func(req *http.Request) (*url.URL, error) { + host := req.URL.Host + // for some urls, the Host is already the host, not the host:port + if net.ParseIP(host) == nil { + var err error + host, _, err = net.SplitHostPort(req.URL.Host) + if err != nil { + return delegate(req) + } + } + + ip := net.ParseIP(host) + if ip == nil { + return delegate(req) + } + + for _, cidr := range cidrs { + if cidr.Contains(ip) { + return nil, nil + } + } + + return delegate(req) + } +} diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/interface.go b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/interface.go new file mode 100644 index 0000000..a1e53d2 --- /dev/null +++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/interface.go @@ -0,0 +1,278 @@ +/* +Copyright 2016 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package net + +import ( + "bufio" + "encoding/hex" + "fmt" + "io" + "net" + "os" + + "strings" + + "github.com/golang/glog" +) + +type Route struct { + Interface string + Destination net.IP + Gateway net.IP + // TODO: add more fields here if needed +} + +func getRoutes(input io.Reader) ([]Route, error) { + routes := []Route{} + if input == nil { + return nil, fmt.Errorf("input is nil") + } + scanner := bufio.NewReader(input) + for { + line, err := scanner.ReadString('\n') + if err == io.EOF { + break + } + //ignore the headers in the route info + if strings.HasPrefix(line, "Iface") { + continue + } + fields := strings.Fields(line) + routes = append(routes, Route{}) + route := &routes[len(routes)-1] + route.Interface = fields[0] + ip, err := parseIP(fields[1]) + if err != nil { + return nil, err + } + route.Destination = ip + ip, err = parseIP(fields[2]) + if err != nil { + return nil, err + } + route.Gateway = ip + } + return routes, nil +} + +func parseIP(str string) (net.IP, error) { + if str == "" { + return nil, fmt.Errorf("input is nil") + } + bytes, err := hex.DecodeString(str) + if err != nil { + return nil, err + } + //TODO add ipv6 support + if len(bytes) != net.IPv4len { + return nil, fmt.Errorf("only IPv4 is supported") + } + bytes[0], bytes[1], bytes[2], bytes[3] = bytes[3], bytes[2], bytes[1], bytes[0] + return net.IP(bytes), nil +} + +func isInterfaceUp(intf *net.Interface) bool { + if intf == nil { + return false + } + if intf.Flags&net.FlagUp != 0 { + glog.V(4).Infof("Interface %v is up", intf.Name) + return true + } + return false +} + +//getFinalIP method receives all the IP addrs of a Interface +//and returns a nil if the address is Loopback, Ipv6, link-local or nil. +//It returns a valid IPv4 if an Ipv4 address is found in the array. +func getFinalIP(addrs []net.Addr) (net.IP, error) { + if len(addrs) > 0 { + for i := range addrs { + glog.V(4).Infof("Checking addr %s.", addrs[i].String()) + ip, _, err := net.ParseCIDR(addrs[i].String()) + if err != nil { + return nil, err + } + //Only IPv4 + //TODO : add IPv6 support + if ip.To4() != nil { + if !ip.IsLoopback() && !ip.IsLinkLocalMulticast() && !ip.IsLinkLocalUnicast() { + glog.V(4).Infof("IP found %v", ip) + return ip, nil + } else { + glog.V(4).Infof("Loopback/link-local found %v", ip) + } + } else { + glog.V(4).Infof("%v is not a valid IPv4 address", ip) + } + + } + } + return nil, nil +} + +func getIPFromInterface(intfName string, nw networkInterfacer) (net.IP, error) { + intf, err := nw.InterfaceByName(intfName) + if err != nil { + return nil, err + } + if isInterfaceUp(intf) { + addrs, err := nw.Addrs(intf) + if err != nil { + return nil, err + } + glog.V(4).Infof("Interface %q has %d addresses :%v.", intfName, len(addrs), addrs) + finalIP, err := getFinalIP(addrs) + if err != nil { + return nil, err + } + if finalIP != nil { + glog.V(4).Infof("valid IPv4 address for interface %q found as %v.", intfName, finalIP) + return finalIP, nil + } + } + + return nil, nil +} + +func flagsSet(flags net.Flags, test net.Flags) bool { + return flags&test != 0 +} + +func flagsClear(flags net.Flags, test net.Flags) bool { + return flags&test == 0 +} + +func chooseHostInterfaceNativeGo() (net.IP, error) { + intfs, err := net.Interfaces() + if err != nil { + return nil, err + } + i := 0 + var ip net.IP + for i = range intfs { + if flagsSet(intfs[i].Flags, net.FlagUp) && flagsClear(intfs[i].Flags, net.FlagLoopback|net.FlagPointToPoint) { + addrs, err := intfs[i].Addrs() + if err != nil { + return nil, err + } + if len(addrs) > 0 { + for _, addr := range addrs { + if addrIP, _, err := net.ParseCIDR(addr.String()); err == nil { + if addrIP.To4() != nil { + ip = addrIP.To4() + if !ip.IsLinkLocalMulticast() && !ip.IsLinkLocalUnicast() { + break + } + } + } + } + if ip != nil { + // This interface should suffice. + break + } + } + } + } + if ip == nil { + return nil, fmt.Errorf("no acceptable interface from host") + } + glog.V(4).Infof("Choosing interface %s (IP %v) as default", intfs[i].Name, ip) + return ip, nil +} + +//ChooseHostInterface is a method used fetch an IP for a daemon. +//It uses data from /proc/net/route file. +//For a node with no internet connection ,it returns error +//For a multi n/w interface node it returns the IP of the interface with gateway on it. +func ChooseHostInterface() (net.IP, error) { + inFile, err := os.Open("/proc/net/route") + if err != nil { + if os.IsNotExist(err) { + return chooseHostInterfaceNativeGo() + } + return nil, err + } + defer inFile.Close() + var nw networkInterfacer = networkInterface{} + return chooseHostInterfaceFromRoute(inFile, nw) +} + +type networkInterfacer interface { + InterfaceByName(intfName string) (*net.Interface, error) + Addrs(intf *net.Interface) ([]net.Addr, error) +} + +type networkInterface struct{} + +func (_ networkInterface) InterfaceByName(intfName string) (*net.Interface, error) { + intf, err := net.InterfaceByName(intfName) + if err != nil { + return nil, err + } + return intf, nil +} + +func (_ networkInterface) Addrs(intf *net.Interface) ([]net.Addr, error) { + addrs, err := intf.Addrs() + if err != nil { + return nil, err + } + return addrs, nil +} + +func chooseHostInterfaceFromRoute(inFile io.Reader, nw networkInterfacer) (net.IP, error) { + routes, err := getRoutes(inFile) + if err != nil { + return nil, err + } + zero := net.IP{0, 0, 0, 0} + var finalIP net.IP + for i := range routes { + //find interface with gateway + if routes[i].Destination.Equal(zero) { + glog.V(4).Infof("Default route transits interface %q", routes[i].Interface) + finalIP, err := getIPFromInterface(routes[i].Interface, nw) + if err != nil { + return nil, err + } + if finalIP != nil { + glog.V(4).Infof("Choosing IP %v ", finalIP) + return finalIP, nil + } + } + } + glog.V(4).Infof("No valid IP found") + if finalIP == nil { + return nil, fmt.Errorf("Unable to select an IP.") + } + return nil, nil +} + +// If bind-address is usable, return it directly +// If bind-address is not usable (unset, 0.0.0.0, or loopback), we will use the host's default +// interface. +func ChooseBindAddress(bindAddress net.IP) (net.IP, error) { + if bindAddress == nil || bindAddress.IsUnspecified() || bindAddress.IsLoopback() { + hostIP, err := ChooseHostInterface() + if err != nil { + return nil, err + } + bindAddress = hostIP + } + return bindAddress, nil +} diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/port_range.go b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/port_range.go new file mode 100644 index 0000000..6afdbf2 --- /dev/null +++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/port_range.go @@ -0,0 +1,108 @@ +/* +Copyright 2015 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package net + +import ( + "fmt" + "strconv" + "strings" +) + +// PortRange represents a range of TCP/UDP ports. To represent a single port, +// set Size to 1. +type PortRange struct { + Base int + Size int +} + +// Contains tests whether a given port falls within the PortRange. +func (pr *PortRange) Contains(p int) bool { + return (p >= pr.Base) && ((p - pr.Base) < pr.Size) +} + +// String converts the PortRange to a string representation, which can be +// parsed by PortRange.Set or ParsePortRange. +func (pr PortRange) String() string { + if pr.Size == 0 { + return "" + } + return fmt.Sprintf("%d-%d", pr.Base, pr.Base+pr.Size-1) +} + +// Set parses a string of the form "min-max", inclusive at both ends, and +// sets the PortRange from it. This is part of the flag.Value and pflag.Value +// interfaces. +func (pr *PortRange) Set(value string) error { + value = strings.TrimSpace(value) + + // TODO: Accept "80" syntax + // TODO: Accept "80+8" syntax + + if value == "" { + pr.Base = 0 + pr.Size = 0 + return nil + } + + hyphenIndex := strings.Index(value, "-") + if hyphenIndex == -1 { + return fmt.Errorf("expected hyphen in port range") + } + + var err error + var low int + var high int + low, err = strconv.Atoi(value[:hyphenIndex]) + if err == nil { + high, err = strconv.Atoi(value[hyphenIndex+1:]) + } + if err != nil { + return fmt.Errorf("unable to parse port range: %s", value) + } + + if high < low { + return fmt.Errorf("end port cannot be less than start port: %s", value) + } + pr.Base = low + pr.Size = 1 + high - low + return nil +} + +// Type returns a descriptive string about this type. This is part of the +// pflag.Value interface. +func (*PortRange) Type() string { + return "portRange" +} + +// ParsePortRange parses a string of the form "min-max", inclusive at both +// ends, and initializs a new PortRange from it. +func ParsePortRange(value string) (*PortRange, error) { + pr := &PortRange{} + err := pr.Set(value) + if err != nil { + return nil, err + } + return pr, nil +} + +func ParsePortRangeOrDie(value string) *PortRange { + pr, err := ParsePortRange(value) + if err != nil { + panic(fmt.Sprintf("couldn't parse port range %q: %v", value, err)) + } + return pr +} diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/port_split.go b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/port_split.go new file mode 100644 index 0000000..29c985e --- /dev/null +++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/port_split.go @@ -0,0 +1,77 @@ +/* +Copyright 2015 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package net + +import ( + "strings" + + "k8s.io/kubernetes/pkg/util/sets" +) + +var validSchemes = sets.NewString("http", "https", "") + +// SplitSchemeNamePort takes a string of the following forms: +// * "<name>", returns "", "<name>","", true +// * "<name>:<port>", returns "", "<name>","<port>",true +// * "<scheme>:<name>:<port>", returns "<scheme>","<name>","<port>",true +// +// Name must be non-empty or valid will be returned false. +// Scheme must be "http" or "https" if specified +// Port is returned as a string, and it is not required to be numeric (could be +// used for a named port, for example). +func SplitSchemeNamePort(id string) (scheme, name, port string, valid bool) { + parts := strings.Split(id, ":") + switch len(parts) { + case 1: + name = parts[0] + case 2: + name = parts[0] + port = parts[1] + case 3: + scheme = parts[0] + name = parts[1] + port = parts[2] + default: + return "", "", "", false + } + + if len(name) > 0 && validSchemes.Has(scheme) { + return scheme, name, port, true + } else { + return "", "", "", false + } +} + +// JoinSchemeNamePort returns a string that specifies the scheme, name, and port: +// * "<name>" +// * "<name>:<port>" +// * "<scheme>:<name>:<port>" +// None of the parameters may contain a ':' character +// Name is required +// Scheme must be "", "http", or "https" +func JoinSchemeNamePort(scheme, name, port string) string { + if len(scheme) > 0 { + // Must include three segments to specify scheme + return scheme + ":" + name + ":" + port + } + if len(port) > 0 { + // Must include two segments to specify port + return name + ":" + port + } + // Return name alone + return name +} diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/sets/README.md b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/sets/README.md new file mode 100644 index 0000000..b0f238a --- /dev/null +++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/sets/README.md @@ -0,0 +1,17 @@ +This package contains hand-coded set implementations that should be similar to +the autogenerated ones in `pkg/util/sets`. + +We can't simply use net.IPNet as a map-key in Go (because it contains a +`[]byte`). + +We could use the same workaround we use here (a string representation as the +key) to autogenerate sets. If we do that, or decide on an alternate approach, +we should replace the implementations in this package with the autogenerated +versions. + +It is expected that callers will alias this import as `netsets` +i.e. `import netsets "k8s.io/kubernetes/pkg/util/net/sets"` + + + +[]() diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/sets/ipnet.go b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/sets/ipnet.go new file mode 100644 index 0000000..5b6fe93 --- /dev/null +++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/sets/ipnet.go @@ -0,0 +1,119 @@ +/* +Copyright 2016 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package sets + +import ( + "net" + "strings" +) + +type IPNet map[string]*net.IPNet + +func ParseIPNets(specs ...string) (IPNet, error) { + ipnetset := make(IPNet) + for _, spec := range specs { + spec = strings.TrimSpace(spec) + _, ipnet, err := net.ParseCIDR(spec) + if err != nil { + return nil, err + } + k := ipnet.String() // In case of normalization + ipnetset[k] = ipnet + } + return ipnetset, nil +} + +// Insert adds items to the set. +func (s IPNet) Insert(items ...*net.IPNet) { + for _, item := range items { + s[item.String()] = item + } +} + +// Delete removes all items from the set. +func (s IPNet) Delete(items ...*net.IPNet) { + for _, item := range items { + delete(s, item.String()) + } +} + +// Has returns true if and only if item is contained in the set. +func (s IPNet) Has(item *net.IPNet) bool { + _, contained := s[item.String()] + return contained +} + +// HasAll returns true if and only if all items are contained in the set. +func (s IPNet) HasAll(items ...*net.IPNet) bool { + for _, item := range items { + if !s.Has(item) { + return false + } + } + return true +} + +// Difference returns a set of objects that are not in s2 +// For example: +// s1 = {a1, a2, a3} +// s2 = {a1, a2, a4, a5} +// s1.Difference(s2) = {a3} +// s2.Difference(s1) = {a4, a5} +func (s IPNet) Difference(s2 IPNet) IPNet { + result := make(IPNet) + for k, i := range s { + _, found := s2[k] + if found { + continue + } + result[k] = i + } + return result +} + +// StringSlice returns a []string with the String representation of each element in the set. +// Order is undefined. +func (s IPNet) StringSlice() []string { + a := make([]string, 0, len(s)) + for k := range s { + a = append(a, k) + } + return a +} + +// IsSuperset returns true if and only if s1 is a superset of s2. +func (s1 IPNet) IsSuperset(s2 IPNet) bool { + for k := range s2 { + _, found := s1[k] + if !found { + return false + } + } + return true +} + +// Equal returns true if and only if s1 is equal (as a set) to s2. +// Two sets are equal if their membership is identical. +// (In practice, this means same elements, order doesn't matter) +func (s1 IPNet) Equal(s2 IPNet) bool { + return len(s1) == len(s2) && s1.IsSuperset(s2) +} + +// Len returns the size of the set. +func (s IPNet) Len() int { + return len(s) +} diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/util.go b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/util.go new file mode 100644 index 0000000..1348f4d --- /dev/null +++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/util/net/util.go @@ -0,0 +1,36 @@ +/* +Copyright 2016 The Kubernetes Authors. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package net + +import ( + "net" + "reflect" +) + +// IPNetEqual checks if the two input IPNets are representing the same subnet. +// For example, +// 10.0.0.1/24 and 10.0.0.0/24 are the same subnet. +// 10.0.0.1/24 and 10.0.0.0/25 are not the same subnet. +func IPNetEqual(ipnet1, ipnet2 *net.IPNet) bool { + if ipnet1 == nil || ipnet2 == nil { + return false + } + if reflect.DeepEqual(ipnet1.Mask, ipnet2.Mask) && ipnet1.Contains(ipnet2.IP) && ipnet2.Contains(ipnet1.IP) { + return true + } + return false +} |