1// Copyright 2011 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 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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCGBLEN, uintptr(unsafe.Pointer(&l)))
29	if err != 0 {
30		return 0, Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCSBLEN, uintptr(unsafe.Pointer(&l)))
38	if err != 0 {
39		return 0, Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCGDLT, uintptr(unsafe.Pointer(&t)))
48	if err != 0 {
49		return 0, Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCSDLT, uintptr(unsafe.Pointer(&t)))
57	if err != 0 {
58		return 0, Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCPROMISC, uintptr(unsafe.Pointer(&m)))
66	if err != 0 {
67		return Errno(err)
68	}
69	return nil
70}
71
72// Deprecated: Use golang.org/x/net/bpf instead.
73func FlushBpf(fd int) error {
74	_, _, err := Syscall(SYS_IOCTL, uintptr(fd), BIOCFLUSH, 0)
75	if err != 0 {
76		return Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCGETIF, uintptr(unsafe.Pointer(&iv)))
90	if err != 0 {
91		return "", Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCSETIF, uintptr(unsafe.Pointer(&iv)))
101	if err != 0 {
102		return Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCGRTIMEOUT, uintptr(unsafe.Pointer(&tv)))
111	if err != 0 {
112		return nil, Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCSRTIMEOUT, uintptr(unsafe.Pointer(tv)))
120	if err != 0 {
121		return Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCGSTATS, uintptr(unsafe.Pointer(&s)))
130	if err != 0 {
131		return nil, Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCIMMEDIATE, uintptr(unsafe.Pointer(&m)))
139	if err != 0 {
140		return Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCSETF, uintptr(unsafe.Pointer(&p)))
151	if err != 0 {
152		return Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCVERSION, uintptr(unsafe.Pointer(&v)))
161	if err != 0 {
162		return Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCGHDRCMPLT, uintptr(unsafe.Pointer(&f)))
174	if err != 0 {
175		return 0, Errno(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 := Syscall(SYS_IOCTL, uintptr(fd), BIOCSHDRCMPLT, uintptr(unsafe.Pointer(&f)))
183	if err != 0 {
184		return Errno(err)
185	}
186	return nil
187}
188