mirror of
https://github.com/restic/restic.git
synced 2024-08-27 06:37:24 +02:00
76 lines
1.6 KiB
Go
76 lines
1.6 KiB
Go
// Copyright 2014 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 linux netbsd openbsd solaris windows
|
|
|
|
package icmp
|
|
|
|
import (
|
|
"net"
|
|
"strconv"
|
|
"syscall"
|
|
)
|
|
|
|
func sockaddr(family int, address string) (syscall.Sockaddr, error) {
|
|
switch family {
|
|
case syscall.AF_INET:
|
|
a, err := net.ResolveIPAddr("ip4", address)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(a.IP) == 0 {
|
|
a.IP = net.IPv4zero
|
|
}
|
|
if a.IP = a.IP.To4(); a.IP == nil {
|
|
return nil, net.InvalidAddrError("non-ipv4 address")
|
|
}
|
|
sa := &syscall.SockaddrInet4{}
|
|
copy(sa.Addr[:], a.IP)
|
|
return sa, nil
|
|
case syscall.AF_INET6:
|
|
a, err := net.ResolveIPAddr("ip6", address)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(a.IP) == 0 {
|
|
a.IP = net.IPv6unspecified
|
|
}
|
|
if a.IP.Equal(net.IPv4zero) {
|
|
a.IP = net.IPv6unspecified
|
|
}
|
|
if a.IP = a.IP.To16(); a.IP == nil || a.IP.To4() != nil {
|
|
return nil, net.InvalidAddrError("non-ipv6 address")
|
|
}
|
|
sa := &syscall.SockaddrInet6{ZoneId: zoneToUint32(a.Zone)}
|
|
copy(sa.Addr[:], a.IP)
|
|
return sa, nil
|
|
default:
|
|
return nil, net.InvalidAddrError("unexpected family")
|
|
}
|
|
}
|
|
|
|
func zoneToUint32(zone string) uint32 {
|
|
if zone == "" {
|
|
return 0
|
|
}
|
|
if ifi, err := net.InterfaceByName(zone); err == nil {
|
|
return uint32(ifi.Index)
|
|
}
|
|
n, err := strconv.Atoi(zone)
|
|
if err != nil {
|
|
return 0
|
|
}
|
|
return uint32(n)
|
|
}
|
|
|
|
func last(s string, b byte) int {
|
|
i := len(s)
|
|
for i--; i >= 0; i-- {
|
|
if s[i] == b {
|
|
break
|
|
}
|
|
}
|
|
return i
|
|
}
|