1 /*
2 * Copyright (c) 1999-2001, 2004 Sendmail, Inc. and its suppliers.
3 * All rights reserved.
4 *
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.
8 *
9 */
10
11 #include <sm/gen.h>
12 SM_RCSID("@(#)$Id: sm_gethost.c,v 8.27 2004/08/20 21:12:37 ca Exp $")
13
14 #include <sendmail.h>
15 #if NETINET || NETINET6
16 # include <arpa/inet.h>
17 #endif /* NETINET || NETINET6 */
18 #include "libmilter.h"
19
20 /*
21 ** MI_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX
22 **
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.
27 **
28 ** Support IPv6 as well as IPv4.
29 */
30
31 #if NETINET6 && NEEDSGETIPNODE
32
33 static struct hostent *getipnodebyname __P((char *, int, int, int *));
34
35 # ifndef AI_ADDRCONFIG
36 # define AI_ADDRCONFIG 0 /* dummy */
37 # endif /* ! AI_ADDRCONFIG */
38 # ifndef AI_ALL
39 # define AI_ALL 0 /* dummy */
40 # endif /* ! AI_ALL */
41 # ifndef AI_DEFAULT
42 # define AI_DEFAULT 0 /* dummy */
43 # endif /* ! AI_DEFAULT */
44
45 static struct hostent *
getipnodebyname(name,family,flags,err)46 getipnodebyname(name, family, flags, err)
47 char *name;
48 int family;
49 int flags;
50 int *err;
51 {
52 bool resv6 = true;
53 struct hostent *h;
54
55 if (family == AF_INET6)
56 {
57 /* From RFC2133, section 6.1 */
58 resv6 = bitset(RES_USE_INET6, _res.options);
59 _res.options |= RES_USE_INET6;
60 }
61 SM_SET_H_ERRNO(0);
62 h = gethostbyname(name);
63 if (family == AF_INET6 && !resv6)
64 _res.options &= ~RES_USE_INET6;
65 *err = h_errno;
66 return h;
67 }
68
69 void
freehostent(h)70 freehostent(h)
71 struct hostent *h;
72 {
73 /*
74 ** Stub routine -- if they don't have getipnodeby*(),
75 ** they probably don't have the free routine either.
76 */
77
78 return;
79 }
80 #endif /* NEEDSGETIPNODE && NETINET6 */
81
82 struct hostent *
mi_gethostbyname(name,family)83 mi_gethostbyname(name, family)
84 char *name;
85 int family;
86 {
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();
93
94 h = _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno);
95 # else /* SOLARIS == 20300 || SOLARIS == 203 */
96 extern struct hostent *__switch_gethostbyname();
97
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)) */
101 # if NETINET6
102 int flags = AI_DEFAULT|AI_ALL;
103 int err;
104 # endif /* NETINET6 */
105
106 # if NETINET6
107 # if ADDRCONFIG_IS_BROKEN
108 flags &= ~AI_ADDRCONFIG;
109 # endif /* ADDRCONFIG_IS_BROKEN */
110 h = getipnodebyname(name, family, flags, &err);
111 SM_SET_H_ERRNO(err);
112 # else /* NETINET6 */
113 h = gethostbyname(name);
114 # endif /* NETINET6 */
115
116 #endif /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */
117 return h;
118 }
119
120 #if NETINET6
121 /*
122 ** MI_INET_PTON -- convert printed form to network address.
123 **
124 ** Wrapper for inet_pton() which handles IPv6: labels.
125 **
126 ** Parameters:
127 ** family -- address family
128 ** src -- string
129 ** dst -- destination address structure
130 **
131 ** Returns:
132 ** 1 if the address was valid
133 ** 0 if the address wasn't parseable
134 ** -1 if error
135 */
136
137 int
mi_inet_pton(family,src,dst)138 mi_inet_pton(family, src, dst)
139 int family;
140 const char *src;
141 void *dst;
142 {
143 if (family == AF_INET6 &&
144 strncasecmp(src, "IPv6:", 5) == 0)
145 src += 5;
146 return inet_pton(family, src, dst);
147 }
148 #endif /* NETINET6 */
149