1// Copyright 2018 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 darwin || dragonfly || freebsd || netbsd || openbsd
6
7// Berkeley packet filter for BSD variants
8
9package syscall
10
11import (
12	"unsafe"
13)
14
15// Deprecated: Use golang.org/x/net/bpf instead.
16func BpfStmt(code, k int) *BpfInsn {
17	return &BpfInsn{Code: uint16(code), K: uint32(k)}
18}
19
20// Deprecated: Use golang.org/x/net/bpf instead.
21func BpfJump(code, k, jt, jf int) *BpfInsn {
22	return &BpfInsn{Code: uint16(code), Jt: uint8(jt), Jf: uint8(jf), K: uint32(k)}
23}
24
25// Deprecated: Use golang.org/x/net/bpf instead.
26func BpfBuflen(fd int) (int, error) {
27	var l int
28	err := ioctlPtr(fd, BIOCGBLEN, unsafe.Pointer(&l))
29	if err != nil {
30		return 0, err
31	}
32	return l, nil
33}
34
35// Deprecated: Use golang.org/x/net/bpf instead.
36func SetBpfBuflen(fd, l int) (int, error) {
37	err := ioctlPtr(fd, BIOCSBLEN, unsafe.Pointer(&l))
38	if err != nil {
39		return 0, err
40	}
41	return l, nil
42}
43
44// Deprecated: Use golang.org/x/net/bpf instead.
45func BpfDatalink(fd int) (int, error) {
46	var t int
47	err := ioctlPtr(fd, BIOCGDLT, unsafe.Pointer(&t))
48	if err != nil {
49		return 0, err
50	}
51	return t, nil
52}
53
54// Deprecated: Use golang.org/x/net/bpf instead.
55func SetBpfDatalink(fd, t int) (int, error) {
56	err := ioctlPtr(fd, BIOCSDLT, unsafe.Pointer(&t))
57	if err != nil {
58		return 0, err
59	}
60	return t, nil
61}
62
63// Deprecated: Use golang.org/x/net/bpf instead.
64func SetBpfPromisc(fd, m int) error {
65	err := ioctlPtr(fd, BIOCPROMISC, unsafe.Pointer(&m))
66	if err != nil {
67		return err
68	}
69	return nil
70}
71
72// Deprecated: Use golang.org/x/net/bpf instead.
73func FlushBpf(fd int) error {
74	err := ioctlPtr(fd, BIOCFLUSH, nil)
75	if err != nil {
76		return err
77	}
78	return nil
79}
80
81type ivalue struct {
82	name  [IFNAMSIZ]byte
83	value int16
84}
85
86// Deprecated: Use golang.org/x/net/bpf instead.
87func BpfInterface(fd int, name string) (string, error) {
88	var iv ivalue
89	err := ioctlPtr(fd, BIOCGETIF, unsafe.Pointer(&iv))
90	if err != nil {
91		return "", err
92	}
93	return name, nil
94}
95
96// Deprecated: Use golang.org/x/net/bpf instead.
97func SetBpfInterface(fd int, name string) error {
98	var iv ivalue
99	copy(iv.name[:], []byte(name))
100	err := ioctlPtr(fd, BIOCSETIF, unsafe.Pointer(&iv))
101	if err != nil {
102		return err
103	}
104	return nil
105}
106
107// Deprecated: Use golang.org/x/net/bpf instead.
108func BpfTimeout(fd int) (*Timeval, error) {
109	var tv Timeval
110	err := ioctlPtr(fd, BIOCGRTIMEOUT, unsafe.Pointer(&tv))
111	if err != nil {
112		return nil, err
113	}
114	return &tv, nil
115}
116
117// Deprecated: Use golang.org/x/net/bpf instead.
118func SetBpfTimeout(fd int, tv *Timeval) error {
119	err := ioctlPtr(fd, BIOCSRTIMEOUT, unsafe.Pointer(tv))
120	if err != nil {
121		return err
122	}
123	return nil
124}
125
126// Deprecated: Use golang.org/x/net/bpf instead.
127func BpfStats(fd int) (*BpfStat, error) {
128	var s BpfStat
129	err := ioctlPtr(fd, BIOCGSTATS, unsafe.Pointer(&s))
130	if err != nil {
131		return nil, err
132	}
133	return &s, nil
134}
135
136// Deprecated: Use golang.org/x/net/bpf instead.
137func SetBpfImmediate(fd, m int) error {
138	err := ioctlPtr(fd, BIOCIMMEDIATE, unsafe.Pointer(&m))
139	if err != nil {
140		return err
141	}
142	return nil
143}
144
145// Deprecated: Use golang.org/x/net/bpf instead.
146func SetBpf(fd int, i []BpfInsn) error {
147	var p BpfProgram
148	p.Len = uint32(len(i))
149	p.Insns = (*BpfInsn)(unsafe.Pointer(&i[0]))
150	err := ioctlPtr(fd, BIOCSETF, unsafe.Pointer(&p))
151	if err != nil {
152		return err
153	}
154	return nil
155}
156
157// Deprecated: Use golang.org/x/net/bpf instead.
158func CheckBpfVersion(fd int) error {
159	var v BpfVersion
160	err := ioctlPtr(fd, BIOCVERSION, unsafe.Pointer(&v))
161	if err != nil {
162		return err
163	}
164	if v.Major != BPF_MAJOR_VERSION || v.Minor != BPF_MINOR_VERSION {
165		return EINVAL
166	}
167	return nil
168}
169
170// Deprecated: Use golang.org/x/net/bpf instead.
171func BpfHeadercmpl(fd int) (int, error) {
172	var f int
173	err := ioctlPtr(fd, BIOCGHDRCMPLT, unsafe.Pointer(&f))
174	if err != nil {
175		return 0, err
176	}
177	return f, nil
178}
179
180// Deprecated: Use golang.org/x/net/bpf instead.
181func SetBpfHeadercmpl(fd, f int) error {
182	err := ioctlPtr(fd, BIOCSHDRCMPLT, unsafe.Pointer(&f))
183	if err != nil {
184		return err
185	}
186	return nil
187}
188