1// Copyright 2022 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 !netgo && darwin
6
7package net
8
9import (
10	"internal/syscall/unix"
11	"runtime"
12	"syscall"
13	"unsafe"
14)
15
16const (
17	_C_AF_INET      = syscall.AF_INET
18	_C_AF_INET6     = syscall.AF_INET6
19	_C_AF_UNSPEC    = syscall.AF_UNSPEC
20	_C_EAI_AGAIN    = unix.EAI_AGAIN
21	_C_EAI_NONAME   = unix.EAI_NONAME
22	_C_EAI_SERVICE  = unix.EAI_SERVICE
23	_C_EAI_NODATA   = unix.EAI_NODATA
24	_C_EAI_OVERFLOW = unix.EAI_OVERFLOW
25	_C_EAI_SYSTEM   = unix.EAI_SYSTEM
26	_C_IPPROTO_TCP  = syscall.IPPROTO_TCP
27	_C_IPPROTO_UDP  = syscall.IPPROTO_UDP
28	_C_SOCK_DGRAM   = syscall.SOCK_DGRAM
29	_C_SOCK_STREAM  = syscall.SOCK_STREAM
30)
31
32type (
33	_C_char               = byte
34	_C_int                = int32
35	_C_uchar              = byte
36	_C_uint               = uint32
37	_C_socklen_t          = int
38	_C_struct___res_state = unix.ResState
39	_C_struct_addrinfo    = unix.Addrinfo
40	_C_struct_sockaddr    = syscall.RawSockaddr
41)
42
43func _C_free(p unsafe.Pointer) { runtime.KeepAlive(p) }
44
45func _C_malloc(n uintptr) unsafe.Pointer {
46	if n <= 0 {
47		n = 1
48	}
49	return unsafe.Pointer(&make([]byte, n)[0])
50}
51
52func _C_ai_addr(ai *_C_struct_addrinfo) **_C_struct_sockaddr { return &ai.Addr }
53func _C_ai_family(ai *_C_struct_addrinfo) *_C_int            { return &ai.Family }
54func _C_ai_flags(ai *_C_struct_addrinfo) *_C_int             { return &ai.Flags }
55func _C_ai_next(ai *_C_struct_addrinfo) **_C_struct_addrinfo { return &ai.Next }
56func _C_ai_protocol(ai *_C_struct_addrinfo) *_C_int          { return &ai.Protocol }
57func _C_ai_socktype(ai *_C_struct_addrinfo) *_C_int          { return &ai.Socktype }
58
59func _C_freeaddrinfo(ai *_C_struct_addrinfo) {
60	unix.Freeaddrinfo(ai)
61}
62
63func _C_gai_strerror(eai _C_int) string {
64	return unix.GaiStrerror(int(eai))
65}
66
67func _C_getaddrinfo(hostname, servname *byte, hints *_C_struct_addrinfo, res **_C_struct_addrinfo) (int, error) {
68	return unix.Getaddrinfo(hostname, servname, hints, res)
69}
70
71func _C_res_ninit(state *_C_struct___res_state) error {
72	unix.ResNinit(state)
73	return nil
74}
75
76func _C_res_nsearch(state *_C_struct___res_state, dname *_C_char, class, typ int, ans *_C_char, anslen int) int {
77	x, _ := unix.ResNsearch(state, dname, class, typ, ans, anslen)
78	return x
79}
80
81func _C_res_nclose(state *_C_struct___res_state) {
82	unix.ResNclose(state)
83}
84
85func cgoNameinfoPTR(b []byte, sa *syscall.RawSockaddr, salen int) (int, error) {
86	gerrno, err := unix.Getnameinfo(sa, salen, &b[0], len(b), nil, 0, unix.NI_NAMEREQD)
87	return int(gerrno), err
88}
89
90func cgoSockaddrInet4(ip IP) *syscall.RawSockaddr {
91	sa := syscall.RawSockaddrInet4{Len: syscall.SizeofSockaddrInet4, Family: syscall.AF_INET}
92	copy(sa.Addr[:], ip)
93	return (*syscall.RawSockaddr)(unsafe.Pointer(&sa))
94}
95
96func cgoSockaddrInet6(ip IP, zone int) *syscall.RawSockaddr {
97	sa := syscall.RawSockaddrInet6{Len: syscall.SizeofSockaddrInet6, Family: syscall.AF_INET6, Scope_id: uint32(zone)}
98	copy(sa.Addr[:], ip)
99	return (*syscall.RawSockaddr)(unsafe.Pointer(&sa))
100}
101