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getaddrinfo.h
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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) 2003-2017, 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
98 struct addrinfo
99 {
100  int ai_flags;
104  size_t ai_addrlen;
105  struct sockaddr *ai_addr;
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  */
115 struct 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 
153 extern int getaddrinfo(const char *node, const char *service,
154  const struct addrinfo * hints, struct addrinfo ** res);
155 extern void freeaddrinfo(struct addrinfo * res);
156 extern const char *gai_strerror(int errcode);
157 extern 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 */
#define getaddrinfo
Definition: getaddrinfo.h:136
#define freeaddrinfo
Definition: getaddrinfo.h:141
int errcode(int sqlerrcode)
Definition: elog.c:575
#define gai_strerror
Definition: getaddrinfo.h:146
char * ai_canonname
Definition: getaddrinfo.h:106
int ai_protocol
Definition: getaddrinfo.h:103
int ai_socktype
Definition: getaddrinfo.h:102
struct addrinfo * ai_next
Definition: getaddrinfo.h:107
#define getnameinfo
Definition: getaddrinfo.h:151
size_t ai_addrlen
Definition: getaddrinfo.h:104
int ai_flags
Definition: getaddrinfo.h:100
struct sockaddr * ai_addr
Definition: getaddrinfo.h:105
int ai_family
Definition: getaddrinfo.h:101