1// Copyright 2013 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//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || windows || zos
6// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris windows zos
7
8package ipv6
9
10import (
11	"net"
12	"runtime"
13	"unsafe"
14
15	"golang.org/x/net/bpf"
16	"golang.org/x/net/internal/socket"
17)
18
19func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) {
20	n, err := so.GetInt(c)
21	if err != nil {
22		return nil, err
23	}
24	return net.InterfaceByIndex(n)
25}
26
27func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error {
28	var n int
29	if ifi != nil {
30		n = ifi.Index
31	}
32	return so.SetInt(c, n)
33}
34
35func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) {
36	b := make([]byte, so.Len)
37	n, err := so.Get(c, b)
38	if err != nil {
39		return nil, err
40	}
41	if n != sizeofICMPv6Filter {
42		return nil, errNotImplemented
43	}
44	return (*ICMPFilter)(unsafe.Pointer(&b[0])), nil
45}
46
47func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error {
48	b := (*[sizeofICMPv6Filter]byte)(unsafe.Pointer(f))[:sizeofICMPv6Filter]
49	return so.Set(c, b)
50}
51
52func (so *sockOpt) getMTUInfo(c *socket.Conn) (*net.Interface, int, error) {
53	b := make([]byte, so.Len)
54	n, err := so.Get(c, b)
55	if err != nil {
56		return nil, 0, err
57	}
58	if n != sizeofIPv6Mtuinfo {
59		return nil, 0, errNotImplemented
60	}
61	mi := (*ipv6Mtuinfo)(unsafe.Pointer(&b[0]))
62	if mi.Addr.Scope_id == 0 || runtime.GOOS == "aix" {
63		// AIX kernel might return a wrong address.
64		return nil, int(mi.Mtu), nil
65	}
66	ifi, err := net.InterfaceByIndex(int(mi.Addr.Scope_id))
67	if err != nil {
68		return nil, 0, err
69	}
70	return ifi, int(mi.Mtu), nil
71}
72
73func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
74	switch so.typ {
75	case ssoTypeIPMreq:
76		return so.setIPMreq(c, ifi, grp)
77	case ssoTypeGroupReq:
78		return so.setGroupReq(c, ifi, grp)
79	default:
80		return errNotImplemented
81	}
82}
83
84func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
85	return so.setGroupSourceReq(c, ifi, grp, src)
86}
87
88func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error {
89	return so.setAttachFilter(c, f)
90}
91