Vendor dependencies with dep

vendor/golang.org/x/net/route/route.go

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+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd openbsd
+
+// Package route provides basic functions for the manipulation of
+// packet routing facilities on BSD variants.
+//
+// The package supports any version of Darwin, any version of
+// DragonFly BSD, FreeBSD 7 through 11, NetBSD 6 and above, and
+// OpenBSD 5.6 and above.
+package route
+
+import (
+	"errors"
+	"os"
+	"syscall"
+)
+
+var (
+	errUnsupportedMessage = errors.New("unsupported message")
+	errMessageMismatch    = errors.New("message mismatch")
+	errMessageTooShort    = errors.New("message too short")
+	errInvalidMessage     = errors.New("invalid message")
+	errInvalidAddr        = errors.New("invalid address")
+	errShortBuffer        = errors.New("short buffer")
+)
+
+// A RouteMessage represents a message conveying an address prefix, a
+// nexthop address and an output interface.
+//
+// Unlike other messages, this message can be used to query adjacency
+// information for the given address prefix, to add a new route, and
+// to delete or modify the existing route from the routing information
+// base inside the kernel by writing and reading route messages on a
+// routing socket.
+//
+// For the manipulation of routing information, the route message must
+// contain appropriate fields that include:
+//
+//	Version       = <must be specified>
+//	Type          = <must be specified>
+//	Flags         = <must be specified>
+//	Index         = <must be specified if necessary>
+//	ID            = <must be specified>
+//	Seq           = <must be specified>
+//	Addrs         = <must be specified>
+//
+// The Type field specifies a type of manipulation, the Flags field
+// specifies a class of target information and the Addrs field
+// specifies target information like the following:
+//
+//	route.RouteMessage{
+//		Version: RTM_VERSION,
+//		Type: RTM_GET,
+//		Flags: RTF_UP | RTF_HOST,
+//		ID: uintptr(os.Getpid()),
+//		Seq: 1,
+//		Addrs: []route.Addrs{
+//			RTAX_DST: &route.Inet4Addr{ ... },
+//			RTAX_IFP: &route.LinkAddr{ ... },
+//			RTAX_BRD: &route.Inet4Addr{ ... },
+//		},
+//	}
+//
+// The values for the above fields depend on the implementation of
+// each operating system.
+//
+// The Err field on a response message contains an error value on the
+// requested operation. If non-nil, the requested operation is failed.
+type RouteMessage struct {
+	Version int     // message version
+	Type    int     // message type
+	Flags   int     // route flags
+	Index   int     // interface index when atatched
+	ID      uintptr // sender's identifier; usually process ID
+	Seq     int     // sequence number
+	Err     error   // error on requested operation
+	Addrs   []Addr  // addresses
+
+	extOff int    // offset of header extension
+	raw    []byte // raw message
+}
+
+// Marshal returns the binary encoding of m.
+func (m *RouteMessage) Marshal() ([]byte, error) {
+	return m.marshal()
+}
+
+// A RIBType reprensents a type of routing information base.
+type RIBType int
+
+const (
+	RIBTypeRoute     RIBType = syscall.NET_RT_DUMP
+	RIBTypeInterface RIBType = syscall.NET_RT_IFLIST
+)
+
+// FetchRIB fetches a routing information base from the operating
+// system.
+//
+// The provided af must be an address family.
+//
+// The provided arg must be a RIBType-specific argument.
+// When RIBType is related to routes, arg might be a set of route
+// flags. When RIBType is related to network interfaces, arg might be
+// an interface index or a set of interface flags. In most cases, zero
+// means a wildcard.
+func FetchRIB(af int, typ RIBType, arg int) ([]byte, error) {
+	mib := [6]int32{sysCTL_NET, sysAF_ROUTE, 0, int32(af), int32(typ), int32(arg)}
+	n := uintptr(0)
+	if err := sysctl(mib[:], nil, &n, nil, 0); err != nil {
+		return nil, os.NewSyscallError("sysctl", err)
+	}
+	if n == 0 {
+		return nil, nil
+	}
+	b := make([]byte, n)
+	if err := sysctl(mib[:], &b[0], &n, nil, 0); err != nil {
+		return nil, os.NewSyscallError("sysctl", err)
+	}
+	return b[:n], nil
+}