vendor: update github.com/hashicorp/go-sockaddr (#3633)

Pull in changes for

 * hashicorp/go-sockaddr#12
 * hashicorp/go-sockaddr#13
 * hashicorp/go-sockaddr#14
 * hashicorp/go-sockaddr#16

vendor/github.com/hashicorp/go-sockaddr/ifaddrs.go

@@ -1,6 +1,7 @@
 package sockaddr
 
 import (
+	"encoding/binary"
 	"errors"
 	"fmt"
 	"math/big"
@@ -866,6 +867,80 @@ func IfAddrMath(operation, value string, inputIfAddr IfAddr) (IfAddr, error) {
 		default:
 			return IfAddr{}, fmt.Errorf("unsupported type for operation %q: %T", operation, sockType)
 		}
+	case "mask":
+		// "mask" operates on the IP address and returns the IP address on
+		// which the given integer mask has been applied. If the applied mask
+		// corresponds to a larger network than the mask of the IP address,
+		// the latter will be replaced by the former.
+		switch sockType := inputIfAddr.SockAddr.Type(); sockType {
+		case TypeIPv4:
+			i, err := strconv.ParseUint(value, 10, 32)
+			if err != nil {
+				return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err)
+			}
+
+			if i > 32 {
+				return IfAddr{}, fmt.Errorf("parameter for operation %q on ipv4 addresses must be between 0 and 32", operation)
+			}
+
+			ipv4 := *ToIPv4Addr(inputIfAddr.SockAddr)
+
+			ipv4Mask := net.CIDRMask(int(i), 32)
+			ipv4MaskUint32 := binary.BigEndian.Uint32(ipv4Mask)
+
+			maskedIpv4 := ipv4.NetIP().Mask(ipv4Mask)
+			maskedIpv4Uint32 := binary.BigEndian.Uint32(maskedIpv4)
+
+			maskedIpv4MaskUint32 := uint32(ipv4.Mask)
+
+			if ipv4MaskUint32 < maskedIpv4MaskUint32 {
+				maskedIpv4MaskUint32 = ipv4MaskUint32
+			}
+
+			return IfAddr{
+				SockAddr: IPv4Addr{
+					Address: IPv4Address(maskedIpv4Uint32),
+					Mask:    IPv4Mask(maskedIpv4MaskUint32),
+				},
+				Interface: inputIfAddr.Interface,
+			}, nil
+		case TypeIPv6:
+			i, err := strconv.ParseUint(value, 10, 32)
+			if err != nil {
+				return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err)
+			}
+
+			if i > 128 {
+				return IfAddr{}, fmt.Errorf("parameter for operation %q on ipv6 addresses must be between 0 and 64", operation)
+			}
+
+			ipv6 := *ToIPv6Addr(inputIfAddr.SockAddr)
+
+			ipv6Mask := net.CIDRMask(int(i), 128)
+			ipv6MaskBigInt := new(big.Int)
+			ipv6MaskBigInt.SetBytes(ipv6Mask)
+
+			maskedIpv6 := ipv6.NetIP().Mask(ipv6Mask)
+			maskedIpv6BigInt := new(big.Int)
+			maskedIpv6BigInt.SetBytes(maskedIpv6)
+
+			maskedIpv6MaskBigInt := new(big.Int)
+			maskedIpv6MaskBigInt.Set(ipv6.Mask)
+
+			if ipv6MaskBigInt.Cmp(maskedIpv6MaskBigInt) == -1 {
+				maskedIpv6MaskBigInt = ipv6MaskBigInt
+			}
+
+			return IfAddr{
+				SockAddr: IPv6Addr{
+					Address: IPv6Address(maskedIpv6BigInt),
+					Mask:    IPv6Mask(maskedIpv6MaskBigInt),
+				},
+				Interface: inputIfAddr.Interface,
+			}, nil
+		default:
+			return IfAddr{}, fmt.Errorf("unsupported type for operation %q: %T", operation, sockType)
+		}
 	default:
 		return IfAddr{}, fmt.Errorf("unsupported math operation: %q", operation)
 	}

vendor/github.com/hashicorp/go-sockaddr/route_info_linux.go

@@ -5,10 +5,6 @@ import (
 	"os/exec"
 )
 
-var cmds map[string][]string = map[string][]string{
-	"ip": {"/sbin/ip", "route"},
-}
-
 type routeInfo struct {
 	cmds map[string][]string
 }
@@ -16,15 +12,22 @@ type routeInfo struct {
 // NewRouteInfo returns a Linux-specific implementation of the RouteInfo
 // interface.
 func NewRouteInfo() (routeInfo, error) {
+	// CoreOS Container Linux moved ip to /usr/bin/ip, so look it up on
+	// $PATH and fallback to /sbin/ip on error.
+	path, _ := exec.LookPath("ip")
+	if path == "" {
+		path = "/sbin/ip"
+	}
+
 	return routeInfo{
-		cmds: cmds,
+		cmds: map[string][]string{"ip": {path, "route"}},
 	}, nil
 }
 
 // GetDefaultInterfaceName returns the interface name attached to the default
 // route on the default interface.
 func (ri routeInfo) GetDefaultInterfaceName() (string, error) {
-	out, err := exec.Command(cmds["ip"][0], cmds["ip"][1:]...).Output()
+	out, err := exec.Command(ri.cmds["ip"][0], ri.cmds["ip"][1:]...).Output()
 	if err != nil {
 		return "", err
 	}

vendor/github.com/hashicorp/go-sockaddr/sockaddr.go

@@ -1,6 +1,7 @@
 package sockaddr
 
 import (
+	"encoding/json"
 	"fmt"
 	"strings"
 )
@@ -176,3 +177,30 @@ func sockAddrInit() {
 func SockAddrAttrs() []AttrName {
 	return sockAddrAttrs
 }
+
+// Although this is pretty trivial to do in a program, having the logic here is
+// useful all around. Note that this marshals into a *string* -- the underlying
+// string representation of the sockaddr. If you then unmarshal into this type
+// in Go, all will work as expected, but externally you can take what comes out
+// and use the string value directly.
+type SockAddrMarshaler struct {
+	SockAddr
+}
+
+func (s *SockAddrMarshaler) MarshalJSON() ([]byte, error) {
+	return json.Marshal(s.SockAddr.String())
+}
+
+func (s *SockAddrMarshaler) UnmarshalJSON(in []byte) error {
+	var str string
+	err := json.Unmarshal(in, &str)
+	if err != nil {
+		return err
+	}
+	sa, err := NewSockAddr(str)
+	if err != nil {
+		return err
+	}
+	s.SockAddr = sa
+	return nil
+}

vendor/github.com/hashicorp/go-sockaddr/template/doc.go

@@ -212,6 +212,13 @@ Supported operations include:
     from the network's broadcast address (e.g. 127.0.0.1 `"network" "-1"` will
     return "127.255.255.255").  Values that overflow the network size will
     safely wrap.
+  - `mask`: Applies the given network mask to the address. The network mask is
+  	expressed as a decimal value (e.g. network mask "24" corresponds to
+  	`255.255.255.0`). After applying the network mask, the network mask of the
+  	resulting address will be either the applied network mask or the network mask
+  	of the input address depending on which network is larger
+  	(e.g. 192.168.10.20/24 `"mask" "16"` will return "192.168.0.0/16" but
+  	192.168.10.20/24 `"mask" "28"` will return "192.168.10.16/24").
 
 Example:
 
@@ -219,6 +226,7 @@ Example:
     {{ GetPrivateInterfaces | include "type" "IP" | math "address" "-256" | attr "address" }}
     {{ GetPrivateInterfaces | include "type" "IP" | math "network" "+2" | attr "address" }}
     {{ GetPrivateInterfaces | include "type" "IP" | math "network" "-2" | attr "address" }}
+    {{ GetPrivateInterfaces | include "type" "IP" | math "mask" "24" | attr "address" }}
     {{ GetPrivateInterfaces | include "flags" "forwardable|up" | include "type" "IPv4" | math "network" "+2" | attr "address" }}
 
 

vendor/vendor.json

@@ -40,8 +40,8 @@
 		{"path":"github.com/hashicorp/go-multierror","checksumSHA1":"lrSl49G23l6NhfilxPM0XFs5rZo=","revision":"d30f09973e19c1dfcd120b2d9c4f168e68d6b5d5","revisionTime":"2015-09-16T20:57:42Z"},
 		{"path":"github.com/hashicorp/go-retryablehttp","checksumSHA1":"yzoWV7yrS/TvOrKy5ZrdUjsYaOA=","revision":"794af36148bf63c118d6db80eb902a136b907e71","revisionTime":"2017-08-24T18:08:59Z"},
 		{"path":"github.com/hashicorp/go-rootcerts","checksumSHA1":"A1PcINvF3UiwHRKn8UcgARgvGRs=","revision":"6bb64b370b90e7ef1fa532be9e591a81c3493e00","revisionTime":"2016-05-03T14:34:40Z"},
-		{"path":"github.com/hashicorp/go-sockaddr","checksumSHA1":"GP24Vz4EmZAL1ZH2TYTkDiiCO94=","revision":"2d10d7c10258d11196c0ebf2943509e4afd06cd4","revisionTime":"2017-05-23T22:50:28Z"},
-		{"path":"github.com/hashicorp/go-sockaddr/template","checksumSHA1":"mIUCMmRHslN2bxQZ0uObMnXxk9E=","revision":"2d10d7c10258d11196c0ebf2943509e4afd06cd4","revisionTime":"2017-05-23T22:50:28Z"},
+		{"path":"github.com/hashicorp/go-sockaddr","checksumSHA1":"eCWvhgknHMj5K19ePPjIA3l401Q=","revision":"9b4c5fa5b10a683339a270d664474b9f4aee62fc","revisionTime":"2017-10-30T10:43:12Z"},
+		{"path":"github.com/hashicorp/go-sockaddr/template","checksumSHA1":"PDp9DVLvf3KWxhs4G4DpIwauMSU=","revision":"9b4c5fa5b10a683339a270d664474b9f4aee62fc","revisionTime":"2017-10-30T10:43:12Z"},
 		{"path":"github.com/hashicorp/go-syslog","checksumSHA1":"xZ7Ban1x//6uUIU1xtrTbCYNHBc=","revision":"42a2b573b664dbf281bd48c3cc12c086b17a39ba","revisionTime":"2015-02-18T18:19:46Z"},
 		{"path":"github.com/hashicorp/go-uuid","checksumSHA1":"mAkPa/RLuIwN53GbwIEMATexams=","revision":"64130c7a86d732268a38cb04cfbaf0cc987fda98","revisionTime":"2016-07-17T02:21:40Z"},
 		{"path":"github.com/hashicorp/go-version","checksumSHA1":"tUGxc7rfX0cmhOOUDhMuAZ9rWsA=","revision":"03c5bf6be031b6dd45afec16b1cf94fc8938bc77","revisionTime":"2017-02-02T08:07:59Z"},