sm_gethost.c revision 95154 
1/*
2 *  Copyright (c) 1999-2001 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>
12SM_RCSID("@(#)$Id: sm_gethost.c,v 1.1.1.7 2002/02/17 21:56:45 gshapiro Exp $")
13
14#include <sendmail.h>
15#if NETINET || NETINET6
16# include <arpa/inet.h>
17#endif /* NETINET || NETINET6 */
18
19/*
20**  MI_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX
21**
22**	Some operating systems have wierd problems with the gethostbyXXX
23**	routines.  For example, Solaris versions at least through 2.3
24**	don't properly deliver a canonical h_name field.  This tries to
25**	work around these problems.
26**
27**	Support IPv6 as well as IPv4.
28*/
29
30#if NETINET6 && NEEDSGETIPNODE
31
32# ifndef AI_ADDRCONFIG
33#  define AI_ADDRCONFIG	0	/* dummy */
34# endif /* ! AI_ADDRCONFIG */
35# ifndef AI_ALL
36#  define AI_ALL	0	/* dummy */
37# endif /* ! AI_ALL */
38# ifndef AI_DEFAULT
39#  define AI_DEFAULT	0	/* dummy */
40# endif /* ! AI_DEFAULT */
41
42static struct hostent *
43getipnodebyname(name, family, flags, err)
44	char *name;
45	int family;
46	int flags;
47	int *err;
48{
49	bool resv6 = true;
50	struct hostent *h;
51
52	if (family == AF_INET6)
53	{
54		/* From RFC2133, section 6.1 */
55		resv6 = bitset(RES_USE_INET6, _res.options);
56		_res.options |= RES_USE_INET6;
57	}
58	SM_SET_H_ERRNO(0);
59	h = gethostbyname(name);
60	if (family == AF_INET6 && !resv6)
61		_res.options &= ~RES_USE_INET6;
62	*err = h_errno;
63	return h;
64}
65
66void
67freehostent(h)
68	struct hostent *h;
69{
70	/*
71	**  Stub routine -- if they don't have getipnodeby*(),
72	**  they probably don't have the free routine either.
73	*/
74
75	return;
76}
77#endif /* NEEDSGETIPNODE && NETINET6 */
78
79struct hostent *
80mi_gethostbyname(name, family)
81	char *name;
82	int family;
83{
84	struct hostent *h = NULL;
85#if (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4))
86# if SOLARIS == 20300 || SOLARIS == 203
87	static struct hostent hp;
88	static char buf[1000];
89	extern struct hostent *_switch_gethostbyname_r();
90
91	h = _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno);
92# else /* SOLARIS == 20300 || SOLARIS == 203 */
93	extern struct hostent *__switch_gethostbyname();
94
95	h = __switch_gethostbyname(name);
96# endif /* SOLARIS == 20300 || SOLARIS == 203 */
97#else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */
98# if NETINET6
99	int flags = AI_DEFAULT|AI_ALL;
100	int err;
101# endif /* NETINET6 */
102
103# if NETINET6
104#  if ADDRCONFIG_IS_BROKEN
105	flags &= ~AI_ADDRCONFIG;
106#  endif /* ADDRCONFIG_IS_BROKEN */
107	h = getipnodebyname(name, family, flags, &err);
108	SM_SET_H_ERRNO(err);
109# else /* NETINET6 */
110	h = gethostbyname(name);
111# endif /* NETINET6 */
112
113#endif /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */
114	return h;
115}
116
117#if NETINET6
118/*
119**  MI_INET_PTON -- convert printed form to network address.
120**
121**	Wrapper for inet_pton() which handles IPv6: labels.
122**
123**	Parameters:
124**		family -- address family
125**		src -- string
126**		dst -- destination address structure
127**
128**	Returns:
129**		1 if the address was valid
130**		0 if the address wasn't parseable
131**		-1 if error
132*/
133
134int
135mi_inet_pton(family, src, dst)
136	int family;
137	const char *src;
138	void *dst;
139{
140	if (family == AF_INET6 &&
141	    strncasecmp(src, "IPv6:", 5) == 0)
142		src += 5;
143	return inet_pton(family, src, dst);
144}
145#endif /* NETINET6 */
146