1/*-------------------------------------------------------------------------
2 *
3 * getaddrinfo.h
4 * Support getaddrinfo() on platforms that don't have it.
5 *
6 * Note: we use our own routines on platforms that don't HAVE_STRUCT_ADDRINFO,
7 * whether or not the library routine getaddrinfo() can be found. This
8 * policy is needed because on some platforms a manually installed libbind.a
9 * may provide getaddrinfo(), yet the system headers may not provide the
10 * struct definitions needed to call it. To avoid conflict with the libbind
11 * definition in such cases, we rename our routines to pg_xxx() via macros.
12 *
13 * This code will also work on platforms where struct addrinfo is defined
14 * in the system headers but no getaddrinfo() can be located.
15 *
16 * Copyright (c) 2003-2019, PostgreSQL Global Development Group
17 *
18 * src/include/getaddrinfo.h
19 *
20 *-------------------------------------------------------------------------
21 */
22#ifndef GETADDRINFO_H
23#define GETADDRINFO_H
24
25#include <sys/socket.h>
26#include <netdb.h>
27
28
29/* Various macros that ought to be in <netdb.h>, but might not be */
30
31#ifndef EAI_FAIL
32#ifndef WIN32
33#define EAI_BADFLAGS (-1)
34#define EAI_NONAME (-2)
35#define EAI_AGAIN (-3)
36#define EAI_FAIL (-4)
37#define EAI_FAMILY (-6)
38#define EAI_SOCKTYPE (-7)
39#define EAI_SERVICE (-8)
40#define EAI_MEMORY (-10)
41#define EAI_SYSTEM (-11)
42#else /* WIN32 */
43#ifdef _MSC_VER
44#ifndef WSA_NOT_ENOUGH_MEMORY
45#define WSA_NOT_ENOUGH_MEMORY (WSAENOBUFS)
46#endif
47#define WSATYPE_NOT_FOUND (WSABASEERR+109)
48#endif
49#define EAI_AGAIN WSATRY_AGAIN
50#define EAI_BADFLAGS WSAEINVAL
51#define EAI_FAIL WSANO_RECOVERY
52#define EAI_FAMILY WSAEAFNOSUPPORT
53#define EAI_MEMORY WSA_NOT_ENOUGH_MEMORY
54#define EAI_NODATA WSANO_DATA
55#define EAI_NONAME WSAHOST_NOT_FOUND
56#define EAI_SERVICE WSATYPE_NOT_FOUND
57#define EAI_SOCKTYPE WSAESOCKTNOSUPPORT
58#endif /* !WIN32 */
59#endif /* !EAI_FAIL */
60
61#ifndef AI_PASSIVE
62#define AI_PASSIVE 0x0001
63#endif
64
65#ifndef AI_NUMERICHOST
66/*
67 * some platforms don't support AI_NUMERICHOST; define as zero if using
68 * the system version of getaddrinfo...
69 */
70#if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
71#define AI_NUMERICHOST 0
72#else
73#define AI_NUMERICHOST 0x0004
74#endif
75#endif
76
77#ifndef NI_NUMERICHOST
78#define NI_NUMERICHOST 1
79#endif
80#ifndef NI_NUMERICSERV
81#define NI_NUMERICSERV 2
82#endif
83#ifndef NI_NAMEREQD
84#define NI_NAMEREQD 4
85#endif
86
87#ifndef NI_MAXHOST
88#define NI_MAXHOST 1025
89#endif
90#ifndef NI_MAXSERV
91#define NI_MAXSERV 32
92#endif
93
94
95#ifndef HAVE_STRUCT_ADDRINFO
96
97#ifndef WIN32
98struct addrinfo
99{
100 int ai_flags;
101 int ai_family;
102 int ai_socktype;
103 int ai_protocol;
104 size_t ai_addrlen;
105 struct sockaddr *ai_addr;
106 char *ai_canonname;
107 struct addrinfo *ai_next;
108};
109#else
110/*
111 * The order of the structure elements on Win32 doesn't match the
112 * order specified in the standard, but we have to match it for
113 * IPv6 to work.
114 */
115struct addrinfo
116{
117 int ai_flags;
118 int ai_family;
119 int ai_socktype;
120 int ai_protocol;
121 size_t ai_addrlen;
122 char *ai_canonname;
123 struct sockaddr *ai_addr;
124 struct addrinfo *ai_next;
125};
126#endif
127#endif /* HAVE_STRUCT_ADDRINFO */
128
129
130#ifndef HAVE_GETADDRINFO
131
132/* Rename private copies per comments above */
133#ifdef getaddrinfo
134#undef getaddrinfo
135#endif
136#define getaddrinfo pg_getaddrinfo
137
138#ifdef freeaddrinfo
139#undef freeaddrinfo
140#endif
141#define freeaddrinfo pg_freeaddrinfo
142
143#ifdef gai_strerror
144#undef gai_strerror
145#endif
146#define gai_strerror pg_gai_strerror
147
148#ifdef getnameinfo
149#undef getnameinfo
150#endif
151#define getnameinfo pg_getnameinfo
152
153extern int getaddrinfo(const char *node, const char *service,
154 const struct addrinfo *hints, struct addrinfo **res);
155extern void freeaddrinfo(struct addrinfo *res);
156extern const char *gai_strerror(int errcode);
157extern int getnameinfo(const struct sockaddr *sa, int salen,
158 char *node, int nodelen,
159 char *service, int servicelen, int flags);
160#endif /* HAVE_GETADDRINFO */
161
162#endif /* GETADDRINFO_H */
163