1 /* Get address information (partial implementation).
2 Copyright (C) 1997, 2001-2002, 2004-2018 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. */
57 #if defined _WIN32 && !defined __CYGWIN__
58 # define WINDOWS_NATIVE
61 /* gl_sockets_startup */
66 /* Avoid warnings from gcc -Wcast-function-type. */
67 # define GetProcAddress \
68 (void *) GetProcAddress
70 typedef int (WSAAPI
*getaddrinfo_func
) (const char*, const char*,
71 const struct addrinfo
*,
73 typedef void (WSAAPI
*freeaddrinfo_func
) (struct addrinfo
*);
74 typedef int (WSAAPI
*getnameinfo_func
) (const struct sockaddr
*,
75 socklen_t
, char*, DWORD
,
78 static getaddrinfo_func getaddrinfo_ptr
= NULL
;
79 static freeaddrinfo_func freeaddrinfo_ptr
= NULL
;
80 static getnameinfo_func getnameinfo_ptr
= NULL
;
89 return getaddrinfo_ptr
? 1 : 0;
93 h
= GetModuleHandle ("ws2_32.dll");
97 getaddrinfo_ptr
= (getaddrinfo_func
) GetProcAddress (h
, "getaddrinfo");
98 freeaddrinfo_ptr
= (freeaddrinfo_func
) GetProcAddress (h
, "freeaddrinfo");
99 getnameinfo_ptr
= (getnameinfo_func
) GetProcAddress (h
, "getnameinfo");
102 /* If either is missing, something is odd. */
103 if (!getaddrinfo_ptr
|| !freeaddrinfo_ptr
|| !getnameinfo_ptr
)
105 getaddrinfo_ptr
= NULL
;
106 freeaddrinfo_ptr
= NULL
;
107 getnameinfo_ptr
= NULL
;
111 gl_sockets_startup (SOCKETS_1_1
);
118 validate_family (int family
)
120 /* FIXME: Support more families. */
122 if (family
== PF_INET
)
126 if (family
== PF_INET6
)
129 if (family
== PF_UNSPEC
)
134 /* Translate name of a service location and/or a service name to set of
137 getaddrinfo (const char *restrict nodename
,
138 const char *restrict servname
,
139 const struct addrinfo
*restrict hints
,
140 struct addrinfo
**restrict res
)
142 struct addrinfo
*tmp
;
149 struct addrinfo addrinfo
;
150 struct sockaddr_in6 sockaddr_in6
;
155 struct addrinfo addrinfo
;
156 struct sockaddr_in sockaddr_in
;
160 #ifdef WINDOWS_NATIVE
162 return getaddrinfo_ptr (nodename
, servname
, hints
, res
);
165 if (hints
&& (hints
->ai_flags
& ~(AI_CANONNAME
|AI_PASSIVE
)))
166 /* FIXME: Support more flags. */
169 if (hints
&& !validate_family (hints
->ai_family
))
173 hints
->ai_socktype
!= SOCK_STREAM
&& hints
->ai_socktype
!= SOCK_DGRAM
)
174 /* FIXME: Support other socktype. */
175 return EAI_SOCKTYPE
; /* FIXME: Better return code? */
179 if (!(hints
->ai_flags
& AI_PASSIVE
))
183 nodename
= (hints
->ai_family
== AF_INET6
) ? "::" : "0.0.0.0";
185 nodename
= "0.0.0.0";
191 struct servent
*se
= NULL
;
193 (hints
&& hints
->ai_socktype
== SOCK_DGRAM
) ? "udp" : "tcp";
195 if (hints
== NULL
|| !(hints
->ai_flags
& AI_NUMERICSERV
))
196 /* FIXME: Use getservbyname_r if available. */
197 se
= getservbyname (servname
, proto
);
202 if (!(*servname
>= '0' && *servname
<= '9'))
204 port
= strtoul (servname
, &c
, 10);
205 if (*c
|| port
> 0xffff)
213 /* FIXME: Use gethostbyname_r if available. */
214 he
= gethostbyname (nodename
);
215 if (!he
|| he
->h_addr_list
[0] == NULL
)
218 switch (he
->h_addrtype
)
222 size
= sizeof (struct v6_pair
);
228 size
= sizeof (struct v4_pair
);
236 storage
= calloc (1, size
);
240 switch (he
->h_addrtype
)
245 struct v6_pair
*p
= storage
;
246 struct sockaddr_in6
*sinp
= &p
->sockaddr_in6
;
250 sinp
->sin6_port
= port
;
252 if (he
->h_length
!= sizeof (sinp
->sin6_addr
))
255 return EAI_SYSTEM
; /* FIXME: Better return code? Set errno? */
258 memcpy (&sinp
->sin6_addr
, he
->h_addr_list
[0], sizeof sinp
->sin6_addr
);
260 tmp
->ai_addr
= (struct sockaddr
*) sinp
;
261 tmp
->ai_addrlen
= sizeof *sinp
;
269 struct v4_pair
*p
= storage
;
270 struct sockaddr_in
*sinp
= &p
->sockaddr_in
;
274 sinp
->sin_port
= port
;
276 if (he
->h_length
!= sizeof (sinp
->sin_addr
))
279 return EAI_SYSTEM
; /* FIXME: Better return code? Set errno? */
282 memcpy (&sinp
->sin_addr
, he
->h_addr_list
[0], sizeof sinp
->sin_addr
);
284 tmp
->ai_addr
= (struct sockaddr
*) sinp
;
285 tmp
->ai_addrlen
= sizeof *sinp
;
295 if (hints
&& hints
->ai_flags
& AI_CANONNAME
)
303 tmp
->ai_canonname
= strdup (cn
);
304 if (!tmp
->ai_canonname
)
311 tmp
->ai_protocol
= (hints
) ? hints
->ai_protocol
: 0;
312 tmp
->ai_socktype
= (hints
) ? hints
->ai_socktype
: 0;
313 tmp
->ai_addr
->sa_family
= he
->h_addrtype
;
314 tmp
->ai_family
= he
->h_addrtype
;
316 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
317 switch (he
->h_addrtype
)
321 tmp
->ai_addr
->sa_len
= sizeof (struct sockaddr_in
);
326 tmp
->ai_addr
->sa_len
= sizeof (struct sockaddr_in6
);
332 /* FIXME: If more than one address, create linked list of addrinfo's. */
339 /* Free 'addrinfo' structure AI including associated storage. */
341 freeaddrinfo (struct addrinfo
*ai
)
343 #ifdef WINDOWS_NATIVE
346 freeaddrinfo_ptr (ai
);
353 struct addrinfo
*cur
;
358 free (cur
->ai_canonname
);
364 getnameinfo (const struct sockaddr
*restrict sa
, socklen_t salen
,
365 char *restrict node
, socklen_t nodelen
,
366 char *restrict service
, socklen_t servicelen
,
369 #ifdef WINDOWS_NATIVE
371 return getnameinfo_ptr (sa
, salen
, node
, nodelen
,
372 service
, servicelen
, flags
);
375 /* FIXME: Support other flags. */
376 if ((node
&& nodelen
> 0 && !(flags
& NI_NUMERICHOST
)) ||
377 (service
&& servicelen
> 0 && !(flags
& NI_NUMERICHOST
)) ||
378 (flags
& ~(NI_NUMERICHOST
|NI_NUMERICSERV
)))
381 if (sa
== NULL
|| salen
< sizeof (sa
->sa_family
))
384 switch (sa
->sa_family
)
388 if (salen
< sizeof (struct sockaddr_in
))
394 if (salen
< sizeof (struct sockaddr_in6
))
402 if (node
&& nodelen
> 0 && flags
& NI_NUMERICHOST
)
404 switch (sa
->sa_family
)
408 if (!inet_ntop (AF_INET
,
409 &(((const struct sockaddr_in
*) sa
)->sin_addr
),
417 if (!inet_ntop (AF_INET6
,
418 &(((const struct sockaddr_in6
*) sa
)->sin6_addr
),
429 if (service
&& servicelen
> 0 && flags
& NI_NUMERICSERV
)
430 switch (sa
->sa_family
)
439 unsigned short int port
440 = ntohs (((const struct sockaddr_in
*) sa
)->sin_port
);
441 if (servicelen
<= snprintf (service
, servicelen
, "%u", port
))