David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 1 | // Copyright 2014 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // +build darwin dragonfly freebsd linux netbsd openbsd solaris windows |
| 6 | |
| 7 | package icmp |
| 8 | |
| 9 | import ( |
| 10 | "net" |
| 11 | "strconv" |
| 12 | "syscall" |
| 13 | ) |
| 14 | |
| 15 | func sockaddr(family int, address string) (syscall.Sockaddr, error) { |
| 16 | switch family { |
| 17 | case syscall.AF_INET: |
| 18 | a, err := net.ResolveIPAddr("ip4", address) |
| 19 | if err != nil { |
| 20 | return nil, err |
| 21 | } |
| 22 | if len(a.IP) == 0 { |
| 23 | a.IP = net.IPv4zero |
| 24 | } |
| 25 | if a.IP = a.IP.To4(); a.IP == nil { |
| 26 | return nil, net.InvalidAddrError("non-ipv4 address") |
| 27 | } |
| 28 | sa := &syscall.SockaddrInet4{} |
| 29 | copy(sa.Addr[:], a.IP) |
| 30 | return sa, nil |
| 31 | case syscall.AF_INET6: |
| 32 | a, err := net.ResolveIPAddr("ip6", address) |
| 33 | if err != nil { |
| 34 | return nil, err |
| 35 | } |
| 36 | if len(a.IP) == 0 { |
| 37 | a.IP = net.IPv6unspecified |
| 38 | } |
| 39 | if a.IP.Equal(net.IPv4zero) { |
| 40 | a.IP = net.IPv6unspecified |
| 41 | } |
| 42 | if a.IP = a.IP.To16(); a.IP == nil || a.IP.To4() != nil { |
| 43 | return nil, net.InvalidAddrError("non-ipv6 address") |
| 44 | } |
| 45 | sa := &syscall.SockaddrInet6{ZoneId: zoneToUint32(a.Zone)} |
| 46 | copy(sa.Addr[:], a.IP) |
| 47 | return sa, nil |
| 48 | default: |
| 49 | return nil, net.InvalidAddrError("unexpected family") |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | func zoneToUint32(zone string) uint32 { |
| 54 | if zone == "" { |
| 55 | return 0 |
| 56 | } |
| 57 | if ifi, err := net.InterfaceByName(zone); err == nil { |
| 58 | return uint32(ifi.Index) |
| 59 | } |
| 60 | n, err := strconv.Atoi(zone) |
| 61 | if err != nil { |
| 62 | return 0 |
| 63 | } |
| 64 | return uint32(n) |
| 65 | } |
| 66 | |
| 67 | func last(s string, b byte) int { |
| 68 | i := len(s) |
| 69 | for i--; i >= 0; i-- { |
| 70 | if s[i] == b { |
| 71 | break |
| 72 | } |
| 73 | } |
| 74 | return i |
| 75 | } |