sm_gethost.c revision 223067
1247834Skib/* 2247834Skib * Copyright (c) 1999-2001, 2004, 2010 Sendmail, Inc. and its suppliers. 3247834Skib * All rights reserved. 4247834Skib * 5247834Skib * By using this file, you agree to the terms and conditions set 6247834Skib * forth in the LICENSE file which can be found at the top level of 7247834Skib * the sendmail distribution. 8247834Skib * 9247834Skib */ 10247834Skib 11247834Skib#include <sm/gen.h> 12247834SkibSM_RCSID("@(#)$Id: sm_gethost.c,v 8.29 2010/07/27 01:09:31 ca Exp $") 13247834Skib 14247834Skib#include <sendmail.h> 15247834Skib#if NETINET || NETINET6 16247834Skib# include <arpa/inet.h> 17247834Skib#endif /* NETINET || NETINET6 */ 18247834Skib#include "libmilter.h" 19247834Skib 20247834Skib/* 21247834Skib** MI_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 22247834Skib** 23247834Skib** Some operating systems have wierd problems with the gethostbyXXX 24247834Skib** routines. For example, Solaris versions at least through 2.3 25247834Skib** don't properly deliver a canonical h_name field. This tries to 26247834Skib** work around these problems. 27247834Skib** 28247834Skib** Support IPv6 as well as IPv4. 29247834Skib*/ 30247834Skib 31247834Skib#if NETINET6 && NEEDSGETIPNODE 32247834Skib 33247834Skibstatic struct hostent *sm_getipnodebyname __P((const char *, int, int, int *)); 34247834Skib 35247834Skib# ifndef AI_ADDRCONFIG 36247834Skib# define AI_ADDRCONFIG 0 /* dummy */ 37247834Skib# endif /* ! AI_ADDRCONFIG */ 38247834Skib# ifndef AI_ALL 39247834Skib# define AI_ALL 0 /* dummy */ 40247834Skib# endif /* ! AI_ALL */ 41247834Skib# ifndef AI_DEFAULT 42247834Skib# define AI_DEFAULT 0 /* dummy */ 43247834Skib# endif /* ! AI_DEFAULT */ 44247834Skib 45247834Skibstatic struct hostent * 46247834Skibsm_getipnodebyname(name, family, flags, err) 47247834Skib const char *name; 48247834Skib int family; 49247834Skib int flags; 50247834Skib int *err; 51247834Skib{ 52247834Skib bool resv6 = true; 53247834Skib struct hostent *h; 54247834Skib 55247834Skib if (family == AF_INET6) 56247834Skib { 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 69void 70freehostent(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#else /* NEEDSGETIPNODE && NETINET6 */ 81#define sm_getipnodebyname getipnodebyname 82#endif /* NEEDSGETIPNODE && NETINET6 */ 83 84struct hostent * 85mi_gethostbyname(name, family) 86 char *name; 87 int family; 88{ 89 struct hostent *h = NULL; 90#if (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) 91# if SOLARIS == 20300 || SOLARIS == 203 92 static struct hostent hp; 93 static char buf[1000]; 94 extern struct hostent *_switch_gethostbyname_r(); 95 96 h = _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 97# else /* SOLARIS == 20300 || SOLARIS == 203 */ 98 extern struct hostent *__switch_gethostbyname(); 99 100 h = __switch_gethostbyname(name); 101# endif /* SOLARIS == 20300 || SOLARIS == 203 */ 102#else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ 103# if NETINET6 104 int flags = AI_DEFAULT|AI_ALL; 105 int err; 106# endif /* NETINET6 */ 107 108# if NETINET6 109# if ADDRCONFIG_IS_BROKEN 110 flags &= ~AI_ADDRCONFIG; 111# endif /* ADDRCONFIG_IS_BROKEN */ 112 h = sm_getipnodebyname(name, family, flags, &err); 113 SM_SET_H_ERRNO(err); 114# else /* NETINET6 */ 115 h = gethostbyname(name); 116# endif /* NETINET6 */ 117 118#endif /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ 119 return h; 120} 121 122#if NETINET6 123/* 124** MI_INET_PTON -- convert printed form to network address. 125** 126** Wrapper for inet_pton() which handles IPv6: labels. 127** 128** Parameters: 129** family -- address family 130** src -- string 131** dst -- destination address structure 132** 133** Returns: 134** 1 if the address was valid 135** 0 if the address wasn't parseable 136** -1 if error 137*/ 138 139int 140mi_inet_pton(family, src, dst) 141 int family; 142 const char *src; 143 void *dst; 144{ 145 if (family == AF_INET6 && 146 strncasecmp(src, "IPv6:", 5) == 0) 147 src += 5; 148 return inet_pton(family, src, dst); 149} 150#endif /* NETINET6 */ 151