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; 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 */ 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 */ 163