2 * Copyright (c) 1999-2001, 2004 Sendmail, Inc. and its suppliers.
5 * By using this file, you agree to the terms and conditions set
6 * forth in the LICENSE file which can be found at the top level of
7 * the sendmail distribution.
12 SM_RCSID("@(#)$Id: sm_gethost.c,v 8.27 2004/08/20 21:12:37 ca Exp $")
15 #if NETINET || NETINET6
16 # include <arpa/inet.h>
17 #endif /* NETINET || NETINET6 */
18 #include "libmilter.h"
21 ** MI_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX
23 ** Some operating systems have wierd problems with the gethostbyXXX
24 ** routines. For example, Solaris versions at least through 2.3
25 ** don't properly deliver a canonical h_name field. This tries to
26 ** work around these problems.
28 ** Support IPv6 as well as IPv4.
31 #if NETINET6 && NEEDSGETIPNODE
33 static struct hostent
*getipnodebyname
__P((char *, int, int, int *));
35 # ifndef AI_ADDRCONFIG
36 # define AI_ADDRCONFIG 0 /* dummy */
37 # endif /* ! AI_ADDRCONFIG */
39 # define AI_ALL 0 /* dummy */
40 # endif /* ! AI_ALL */
42 # define AI_DEFAULT 0 /* dummy */
43 # endif /* ! AI_DEFAULT */
45 static struct hostent
*
46 getipnodebyname(name
, family
, flags
, err
)
55 if (family
== AF_INET6
)
57 /* From RFC2133, section 6.1 */
58 resv6
= bitset(RES_USE_INET6
, _res
.options
);
59 _res
.options
|= RES_USE_INET6
;
62 h
= gethostbyname(name
);
63 if (family
== AF_INET6
&& !resv6
)
64 _res
.options
&= ~RES_USE_INET6
;
74 ** Stub routine -- if they don't have getipnodeby*(),
75 ** they probably don't have the free routine either.
80 #endif /* NEEDSGETIPNODE && NETINET6 */
83 mi_gethostbyname(name
, family
)
87 struct hostent
*h
= NULL
;
88 #if (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4))
89 # if SOLARIS == 20300 || SOLARIS == 203
90 static struct hostent hp
;
91 static char buf
[1000];
92 extern struct hostent
*_switch_gethostbyname_r();
94 h
= _switch_gethostbyname_r(name
, &hp
, buf
, sizeof(buf
), &h_errno
);
95 # else /* SOLARIS == 20300 || SOLARIS == 203 */
96 extern struct hostent
*__switch_gethostbyname();
98 h
= __switch_gethostbyname(name
);
99 # endif /* SOLARIS == 20300 || SOLARIS == 203 */
100 #else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */
102 int flags
= AI_DEFAULT
|AI_ALL
;
104 # endif /* NETINET6 */
107 # if ADDRCONFIG_IS_BROKEN
108 flags
&= ~AI_ADDRCONFIG
;
109 # endif /* ADDRCONFIG_IS_BROKEN */
110 h
= getipnodebyname(name
, family
, flags
, &err
);
112 # else /* NETINET6 */
113 h
= gethostbyname(name
);
114 # endif /* NETINET6 */
116 #endif /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */
122 ** MI_INET_PTON -- convert printed form to network address.
124 ** Wrapper for inet_pton() which handles IPv6: labels.
127 ** family -- address family
129 ** dst -- destination address structure
132 ** 1 if the address was valid
133 ** 0 if the address wasn't parseable
138 mi_inet_pton(family
, src
, dst
)
143 if (family
== AF_INET6
&&
144 strncasecmp(src
, "IPv6:", 5) == 0)
146 return inet_pton(family
, src
, dst
);
148 #endif /* NETINET6 */