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 cgo && !netgo && unix && !darwin
6
7package net
8
9/*
10#define _GNU_SOURCE 1
11
12#cgo CFLAGS: -fno-stack-protector
13#include <sys/types.h>
14#include <sys/socket.h>
15#include <netinet/in.h>
16#include <netdb.h>
17#include <unistd.h>
18#include <string.h>
19#include <stdlib.h>
20
21#ifndef EAI_NODATA
22#define EAI_NODATA -5
23#endif
24
25// If nothing else defined EAI_OVERFLOW, make sure it has a value.
26#ifndef EAI_OVERFLOW
27#define EAI_OVERFLOW -12
28#endif
29*/
30import "C"
31import "unsafe"
32
33const (
34	_C_AF_INET      = C.AF_INET
35	_C_AF_INET6     = C.AF_INET6
36	_C_AF_UNSPEC    = C.AF_UNSPEC
37	_C_EAI_AGAIN    = C.EAI_AGAIN
38	_C_EAI_NODATA   = C.EAI_NODATA
39	_C_EAI_NONAME   = C.EAI_NONAME
40	_C_EAI_SERVICE  = C.EAI_SERVICE
41	_C_EAI_OVERFLOW = C.EAI_OVERFLOW
42	_C_EAI_SYSTEM   = C.EAI_SYSTEM
43	_C_IPPROTO_TCP  = C.IPPROTO_TCP
44	_C_IPPROTO_UDP  = C.IPPROTO_UDP
45	_C_SOCK_DGRAM   = C.SOCK_DGRAM
46	_C_SOCK_STREAM  = C.SOCK_STREAM
47)
48
49type (
50	_C_char            = C.char
51	_C_uchar           = C.uchar
52	_C_int             = C.int
53	_C_uint            = C.uint
54	_C_socklen_t       = C.socklen_t
55	_C_struct_addrinfo = C.struct_addrinfo
56	_C_struct_sockaddr = C.struct_sockaddr
57)
58
59func _C_malloc(n uintptr) unsafe.Pointer { return C.malloc(C.size_t(n)) }
60func _C_free(p unsafe.Pointer)           { C.free(p) }
61
62func _C_ai_addr(ai *_C_struct_addrinfo) **_C_struct_sockaddr { return &ai.ai_addr }
63func _C_ai_family(ai *_C_struct_addrinfo) *_C_int            { return &ai.ai_family }
64func _C_ai_flags(ai *_C_struct_addrinfo) *_C_int             { return &ai.ai_flags }
65func _C_ai_next(ai *_C_struct_addrinfo) **_C_struct_addrinfo { return &ai.ai_next }
66func _C_ai_protocol(ai *_C_struct_addrinfo) *_C_int          { return &ai.ai_protocol }
67func _C_ai_socktype(ai *_C_struct_addrinfo) *_C_int          { return &ai.ai_socktype }
68
69func _C_freeaddrinfo(ai *_C_struct_addrinfo) {
70	C.freeaddrinfo(ai)
71}
72
73func _C_gai_strerror(eai _C_int) string {
74	return C.GoString(C.gai_strerror(eai))
75}
76
77func _C_getaddrinfo(hostname, servname *_C_char, hints *_C_struct_addrinfo, res **_C_struct_addrinfo) (int, error) {
78	x, err := C.getaddrinfo(hostname, servname, hints, res)
79	return int(x), err
80}
81