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 #ifndef lint 12 static char id[] = "@(#)$Id: sm_gethost.c,v 8.7.8.11 2001/07/21 00:10:23 gshapiro Exp $"; 13 #endif /* ! lint */ 14 15 #if _FFR_MILTER 16 #include <sendmail.h> 17 #if NETINET || NETINET6 18 # include <arpa/inet.h> 19 #endif /* NETINET || NETINET6 */ 20 21 /* 22 ** MI_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 23 ** 24 ** Some operating systems have wierd problems with the gethostbyXXX 25 ** routines. For example, Solaris versions at least through 2.3 26 ** don't properly deliver a canonical h_name field. This tries to 27 ** work around these problems. 28 ** 29 ** Support IPv6 as well as IPv4. 30 */ 31 32 #if NETINET6 && NEEDSGETIPNODE 33 34 # ifndef AI_ADDRCONFIG 35 # define AI_ADDRCONFIG 0 /* dummy */ 36 # endif /* ! AI_ADDRCONFIG */ 37 # ifndef AI_ALL 38 # define AI_ALL 0 /* dummy */ 39 # endif /* ! AI_ALL */ 40 # ifndef AI_DEFAULT 41 # define AI_DEFAULT 0 /* dummy */ 42 # endif /* ! AI_DEFAULT */ 43 44 static struct hostent * 45 getipnodebyname(name, family, flags, err) 46 char *name; 47 int family; 48 int flags; 49 int *err; 50 { 51 bool resv6 = TRUE; 52 struct hostent *h; 53 54 if (family == AF_INET6) 55 { 56 /* From RFC2133, section 6.1 */ 57 resv6 = bitset(RES_USE_INET6, _res.options); 58 _res.options |= RES_USE_INET6; 59 } 60 SM_SET_H_ERRNO(0); 61 h = gethostbyname(name); 62 *err = h_errno; 63 if (family == AF_INET6 && !resv6) 64 _res.options &= ~RES_USE_INET6; 65 return h; 66 } 67 68 # if _FFR_FREEHOSTENT 69 void 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 /* _FFR_FREEHOSTENT */ 81 #endif /* NEEDSGETIPNODE && NETINET6 */ 82 83 struct hostent * 84 mi_gethostbyname(name, family) 85 char *name; 86 int family; 87 { 88 struct hostent *h = NULL; 89 #if (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) 90 # if SOLARIS == 20300 || SOLARIS == 203 91 static struct hostent hp; 92 static char buf[1000]; 93 extern struct hostent *_switch_gethostbyname_r(); 94 95 h = _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 96 # else /* SOLARIS == 20300 || SOLARIS == 203 */ 97 extern struct hostent *__switch_gethostbyname(); 98 99 h = __switch_gethostbyname(name); 100 # endif /* SOLARIS == 20300 || SOLARIS == 203 */ 101 #else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ 102 # if NETINET6 103 int flags = AI_DEFAULT|AI_ALL; 104 int err; 105 # endif /* NETINET6 */ 106 107 # if NETINET6 108 # if ADDRCONFIG_IS_BROKEN 109 flags &= ~AI_ADDRCONFIG; 110 # endif /* ADDRCONFIG_IS_BROKEN */ 111 h = getipnodebyname(name, family, flags, &err); 112 SM_SET_H_ERRNO(err); 113 # else /* NETINET6 */ 114 h = gethostbyname(name); 115 # endif /* NETINET6 */ 116 117 #endif /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ 118 return h; 119 } 120 #endif /* _FFR_MILTER */ 121