1 /* Get address information (partial implementation).
2 Copyright (C) 1997, 2001-2002, 2004-2020 Free Software Foundation, Inc.
3 Contributed by Simon Josefsson <simon@josefsson.org>.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <https://www.gnu.org/licenses/>. */
18 /* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
19 optimizes away the sa == NULL test below. */
20 #define _GL_ARG_NONNULL(params)
27 # include <netinet/in.h>
31 #include <arpa/inet.h>
36 /* Get memcpy, strdup. */
45 #define _(String) gettext (String)
46 #define N_(String) String
48 /* BeOS has AF_INET, but not PF_INET. */
50 # define PF_INET AF_INET
52 /* BeOS also lacks PF_UNSPEC. */
59 /* Override with cdecl calling convention. */
62 getaddrinfo (const char *restrict nodename
,
63 const char *restrict servname
,
64 const struct addrinfo
*restrict hints
,
65 struct addrinfo
**restrict res
)
68 return getaddrinfo (nodename
, servname
, hints
, res
);
72 freeaddrinfo (struct addrinfo
*ai
)
80 # if defined _WIN32 && !defined __CYGWIN__
81 # define WINDOWS_NATIVE
84 /* gl_sockets_startup */
87 # ifdef WINDOWS_NATIVE
89 /* Don't assume that UNICODE is not defined. */
90 # undef GetModuleHandle
91 # define GetModuleHandle GetModuleHandleA
93 # if !(_WIN32_WINNT >= _WIN32_WINNT_WINXP)
95 /* Avoid warnings from gcc -Wcast-function-type. */
96 # define GetProcAddress \
97 (void *) GetProcAddress
99 typedef int (WSAAPI
*getaddrinfo_func
) (const char*, const char*,
100 const struct addrinfo
*,
102 typedef void (WSAAPI
*freeaddrinfo_func
) (struct addrinfo
*);
103 typedef int (WSAAPI
*getnameinfo_func
) (const struct sockaddr
*,
104 socklen_t
, char*, DWORD
,
107 static getaddrinfo_func getaddrinfo_ptr
= NULL
;
108 static freeaddrinfo_func freeaddrinfo_ptr
= NULL
;
109 static getnameinfo_func getnameinfo_ptr
= NULL
;
118 return getaddrinfo_ptr
? 1 : 0;
122 h
= GetModuleHandle ("ws2_32.dll");
126 getaddrinfo_ptr
= (getaddrinfo_func
) GetProcAddress (h
, "getaddrinfo");
127 freeaddrinfo_ptr
= (freeaddrinfo_func
) GetProcAddress (h
, "freeaddrinfo");
128 getnameinfo_ptr
= (getnameinfo_func
) GetProcAddress (h
, "getnameinfo");
131 /* If either is missing, something is odd. */
132 if (!getaddrinfo_ptr
|| !freeaddrinfo_ptr
|| !getnameinfo_ptr
)
134 getaddrinfo_ptr
= NULL
;
135 freeaddrinfo_ptr
= NULL
;
136 getnameinfo_ptr
= NULL
;
140 gl_sockets_startup (SOCKETS_1_1
);
156 gl_sockets_startup (SOCKETS_1_1
);
162 # define getaddrinfo_ptr getaddrinfo
163 # define freeaddrinfo_ptr freeaddrinfo
164 # define getnameinfo_ptr getnameinfo
170 validate_family (int family
)
172 /* FIXME: Support more families. */
174 if (family
== PF_INET
)
178 if (family
== PF_INET6
)
181 if (family
== PF_UNSPEC
)
186 /* Translate name of a service location and/or a service name to set of
189 getaddrinfo (const char *restrict nodename
,
190 const char *restrict servname
,
191 const struct addrinfo
*restrict hints
,
192 struct addrinfo
**restrict res
)
195 struct addrinfo
*tmp
;
202 struct addrinfo addrinfo
;
203 struct sockaddr_in6 sockaddr_in6
;
208 struct addrinfo addrinfo
;
209 struct sockaddr_in sockaddr_in
;
213 # ifdef WINDOWS_NATIVE
215 return getaddrinfo_ptr (nodename
, servname
, hints
, res
);
218 if (hints
&& (hints
->ai_flags
& ~(AI_CANONNAME
|AI_PASSIVE
)))
219 /* FIXME: Support more flags. */
222 if (hints
&& !validate_family (hints
->ai_family
))
226 hints
->ai_socktype
!= SOCK_STREAM
&& hints
->ai_socktype
!= SOCK_DGRAM
)
227 /* FIXME: Support other socktype. */
228 return EAI_SOCKTYPE
; /* FIXME: Better return code? */
232 if (!(hints
->ai_flags
& AI_PASSIVE
))
236 nodename
= (hints
->ai_family
== AF_INET6
) ? "::" : "0.0.0.0";
238 nodename
= "0.0.0.0";
244 struct servent
*se
= NULL
;
246 (hints
&& hints
->ai_socktype
== SOCK_DGRAM
) ? "udp" : "tcp";
248 if (hints
== NULL
|| !(hints
->ai_flags
& AI_NUMERICSERV
))
249 /* FIXME: Use getservbyname_r if available. */
250 se
= getservbyname (servname
, proto
);
255 if (!(*servname
>= '0' && *servname
<= '9'))
257 port
= strtoul (servname
, &c
, 10);
258 if (*c
|| port
> 0xffff)
266 /* FIXME: Use gethostbyname_r if available. */
267 he
= gethostbyname (nodename
);
268 if (!he
|| he
->h_addr_list
[0] == NULL
)
271 switch (he
->h_addrtype
)
275 size
= sizeof (struct v6_pair
);
281 size
= sizeof (struct v4_pair
);
289 storage
= calloc (1, size
);
293 switch (he
->h_addrtype
)
298 struct v6_pair
*p
= storage
;
299 struct sockaddr_in6
*sinp
= &p
->sockaddr_in6
;
303 sinp
->sin6_port
= port
;
305 if (he
->h_length
!= sizeof (sinp
->sin6_addr
))
308 return EAI_SYSTEM
; /* FIXME: Better return code? Set errno? */
311 memcpy (&sinp
->sin6_addr
, he
->h_addr_list
[0], sizeof sinp
->sin6_addr
);
313 tmp
->ai_addr
= (struct sockaddr
*) sinp
;
314 tmp
->ai_addrlen
= sizeof *sinp
;
322 struct v4_pair
*p
= storage
;
323 struct sockaddr_in
*sinp
= &p
->sockaddr_in
;
327 sinp
->sin_port
= port
;
329 if (he
->h_length
!= sizeof (sinp
->sin_addr
))
332 return EAI_SYSTEM
; /* FIXME: Better return code? Set errno? */
335 memcpy (&sinp
->sin_addr
, he
->h_addr_list
[0], sizeof sinp
->sin_addr
);
337 tmp
->ai_addr
= (struct sockaddr
*) sinp
;
338 tmp
->ai_addrlen
= sizeof *sinp
;
348 if (hints
&& hints
->ai_flags
& AI_CANONNAME
)
356 tmp
->ai_canonname
= strdup (cn
);
357 if (!tmp
->ai_canonname
)
364 tmp
->ai_protocol
= (hints
) ? hints
->ai_protocol
: 0;
365 tmp
->ai_socktype
= (hints
) ? hints
->ai_socktype
: 0;
366 tmp
->ai_addr
->sa_family
= he
->h_addrtype
;
367 tmp
->ai_family
= he
->h_addrtype
;
369 # ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
370 switch (he
->h_addrtype
)
374 tmp
->ai_addr
->sa_len
= sizeof (struct sockaddr_in
);
379 tmp
->ai_addr
->sa_len
= sizeof (struct sockaddr_in6
);
385 /* FIXME: If more than one address, create linked list of addrinfo's. */
392 /* Free 'addrinfo' structure AI including associated storage. */
394 freeaddrinfo (struct addrinfo
*ai
)
397 # ifdef WINDOWS_NATIVE
400 freeaddrinfo_ptr (ai
);
407 struct addrinfo
*cur
;
412 free (cur
->ai_canonname
);
418 getnameinfo (const struct sockaddr
*restrict sa
, socklen_t salen
,
419 char *restrict node
, socklen_t nodelen
,
420 char *restrict service
, socklen_t servicelen
,
424 # ifdef WINDOWS_NATIVE
426 return getnameinfo_ptr (sa
, salen
, node
, nodelen
,
427 service
, servicelen
, flags
);
430 /* FIXME: Support other flags. */
431 if ((node
&& nodelen
> 0 && !(flags
& NI_NUMERICHOST
)) ||
432 (service
&& servicelen
> 0 && !(flags
& NI_NUMERICHOST
)) ||
433 (flags
& ~(NI_NUMERICHOST
|NI_NUMERICSERV
)))
436 if (sa
== NULL
|| salen
< sizeof (sa
->sa_family
))
439 switch (sa
->sa_family
)
443 if (salen
< sizeof (struct sockaddr_in
))
449 if (salen
< sizeof (struct sockaddr_in6
))
457 if (node
&& nodelen
> 0 && flags
& NI_NUMERICHOST
)
459 switch (sa
->sa_family
)
463 if (!inet_ntop (AF_INET
,
464 &(((const struct sockaddr_in
*) sa
)->sin_addr
),
472 if (!inet_ntop (AF_INET6
,
473 &(((const struct sockaddr_in6
*) sa
)->sin6_addr
),
484 if (service
&& servicelen
> 0 && flags
& NI_NUMERICSERV
)
485 switch (sa
->sa_family
)
494 unsigned short int port
495 = ntohs (((const struct sockaddr_in
*) sa
)->sin_port
);
496 if (servicelen
<= snprintf (service
, servicelen
, "%u", port
))