164562Sgshapiro/* 2249729Sgshapiro * Copyright (c) 1999-2001, 2004, 2010, 2013 Sendmail, Inc. and its suppliers. 364562Sgshapiro * All rights reserved. 464562Sgshapiro * 564562Sgshapiro * By using this file, you agree to the terms and conditions set 664562Sgshapiro * forth in the LICENSE file which can be found at the top level of 764562Sgshapiro * the sendmail distribution. 864562Sgshapiro * 964562Sgshapiro */ 1064562Sgshapiro 1190792Sgshapiro#include <sm/gen.h> 12249729SgshapiroSM_RCSID("@(#)$Id: sm_gethost.c,v 8.30 2013/02/22 22:43:33 gshapiro Exp $") 1364562Sgshapiro 1464562Sgshapiro#include <sendmail.h> 1564562Sgshapiro#if NETINET || NETINET6 1664562Sgshapiro# include <arpa/inet.h> 1764562Sgshapiro#endif /* NETINET || NETINET6 */ 18141858Sgshapiro#include "libmilter.h" 1964562Sgshapiro 2090792Sgshapiro/* 2164562Sgshapiro** MI_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 2264562Sgshapiro** 2364562Sgshapiro** Some operating systems have wierd problems with the gethostbyXXX 2464562Sgshapiro** routines. For example, Solaris versions at least through 2.3 2564562Sgshapiro** don't properly deliver a canonical h_name field. This tries to 2664562Sgshapiro** work around these problems. 2764562Sgshapiro** 2864562Sgshapiro** Support IPv6 as well as IPv4. 2964562Sgshapiro*/ 3064562Sgshapiro 3177349Sgshapiro#if NETINET6 && NEEDSGETIPNODE 3264562Sgshapiro 33223067Sgshapirostatic struct hostent *sm_getipnodebyname __P((const char *, int, int, int *)); 34141858Sgshapiro 3580785Sgshapiro# ifndef AI_ADDRCONFIG 3680785Sgshapiro# define AI_ADDRCONFIG 0 /* dummy */ 3780785Sgshapiro# endif /* ! AI_ADDRCONFIG */ 3864562Sgshapiro# ifndef AI_ALL 3964562Sgshapiro# define AI_ALL 0 /* dummy */ 4064562Sgshapiro# endif /* ! AI_ALL */ 4180785Sgshapiro# ifndef AI_DEFAULT 4280785Sgshapiro# define AI_DEFAULT 0 /* dummy */ 4380785Sgshapiro# endif /* ! AI_DEFAULT */ 4464562Sgshapiro 4564562Sgshapirostatic struct hostent * 46223067Sgshapirosm_getipnodebyname(name, family, flags, err) 47223067Sgshapiro const char *name; 4864562Sgshapiro int family; 4964562Sgshapiro int flags; 5064562Sgshapiro int *err; 5164562Sgshapiro{ 5290792Sgshapiro bool resv6 = true; 5364562Sgshapiro struct hostent *h; 5464562Sgshapiro 5564562Sgshapiro if (family == AF_INET6) 5664562Sgshapiro { 5764562Sgshapiro /* From RFC2133, section 6.1 */ 5864562Sgshapiro resv6 = bitset(RES_USE_INET6, _res.options); 5964562Sgshapiro _res.options |= RES_USE_INET6; 6064562Sgshapiro } 6173188Sgshapiro SM_SET_H_ERRNO(0); 6264562Sgshapiro h = gethostbyname(name); 6364562Sgshapiro if (family == AF_INET6 && !resv6) 6464562Sgshapiro _res.options &= ~RES_USE_INET6; 6590792Sgshapiro *err = h_errno; 6664562Sgshapiro return h; 6764562Sgshapiro} 6871345Sgshapiro 6971345Sgshapirovoid 7071345Sgshapirofreehostent(h) 7171345Sgshapiro struct hostent *h; 7271345Sgshapiro{ 7371345Sgshapiro /* 7471345Sgshapiro ** Stub routine -- if they don't have getipnodeby*(), 7571345Sgshapiro ** they probably don't have the free routine either. 7671345Sgshapiro */ 7771345Sgshapiro 7871345Sgshapiro return; 7971345Sgshapiro} 80223067Sgshapiro#else /* NEEDSGETIPNODE && NETINET6 */ 81223067Sgshapiro#define sm_getipnodebyname getipnodebyname 8277349Sgshapiro#endif /* NEEDSGETIPNODE && NETINET6 */ 8364562Sgshapiro 8464562Sgshapirostruct hostent * 8564562Sgshapiromi_gethostbyname(name, family) 8664562Sgshapiro char *name; 8764562Sgshapiro int family; 8864562Sgshapiro{ 8964562Sgshapiro struct hostent *h = NULL; 9064562Sgshapiro#if (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) 9164562Sgshapiro# if SOLARIS == 20300 || SOLARIS == 203 9264562Sgshapiro static struct hostent hp; 9364562Sgshapiro static char buf[1000]; 9464562Sgshapiro extern struct hostent *_switch_gethostbyname_r(); 9564562Sgshapiro 9664562Sgshapiro h = _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 9764562Sgshapiro# else /* SOLARIS == 20300 || SOLARIS == 203 */ 9864562Sgshapiro extern struct hostent *__switch_gethostbyname(); 9964562Sgshapiro 10064562Sgshapiro h = __switch_gethostbyname(name); 10164562Sgshapiro# endif /* SOLARIS == 20300 || SOLARIS == 203 */ 10264562Sgshapiro#else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ 10364562Sgshapiro# if NETINET6 104249729Sgshapiro# ifndef SM_IPNODEBYNAME_FLAGS 105249729Sgshapiro /* For IPv4-mapped addresses, use: AI_DEFAULT|AI_ALL */ 106249729Sgshapiro# define SM_IPNODEBYNAME_FLAGS AI_ADDRCONFIG 107249729Sgshapiro# endif /* SM_IPNODEBYNAME_FLAGS */ 108249729Sgshapiro 109249729Sgshapiro int flags = SM_IPNODEBYNAME_FLAGS; 11064562Sgshapiro int err; 11164562Sgshapiro# endif /* NETINET6 */ 11264562Sgshapiro 11364562Sgshapiro# if NETINET6 11480785Sgshapiro# if ADDRCONFIG_IS_BROKEN 11580785Sgshapiro flags &= ~AI_ADDRCONFIG; 11680785Sgshapiro# endif /* ADDRCONFIG_IS_BROKEN */ 117223067Sgshapiro h = sm_getipnodebyname(name, family, flags, &err); 11873188Sgshapiro SM_SET_H_ERRNO(err); 11964562Sgshapiro# else /* NETINET6 */ 12064562Sgshapiro h = gethostbyname(name); 12164562Sgshapiro# endif /* NETINET6 */ 12264562Sgshapiro 12364562Sgshapiro#endif /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ 12464562Sgshapiro return h; 12564562Sgshapiro} 12690792Sgshapiro 12790792Sgshapiro#if NETINET6 12890792Sgshapiro/* 12990792Sgshapiro** MI_INET_PTON -- convert printed form to network address. 13090792Sgshapiro** 13190792Sgshapiro** Wrapper for inet_pton() which handles IPv6: labels. 13290792Sgshapiro** 13390792Sgshapiro** Parameters: 13490792Sgshapiro** family -- address family 13590792Sgshapiro** src -- string 13690792Sgshapiro** dst -- destination address structure 13790792Sgshapiro** 13890792Sgshapiro** Returns: 13990792Sgshapiro** 1 if the address was valid 14090792Sgshapiro** 0 if the address wasn't parseable 14190792Sgshapiro** -1 if error 14290792Sgshapiro*/ 14390792Sgshapiro 14490792Sgshapiroint 14590792Sgshapiromi_inet_pton(family, src, dst) 14690792Sgshapiro int family; 14790792Sgshapiro const char *src; 14890792Sgshapiro void *dst; 14990792Sgshapiro{ 15090792Sgshapiro if (family == AF_INET6 && 15190792Sgshapiro strncasecmp(src, "IPv6:", 5) == 0) 15290792Sgshapiro src += 5; 15390792Sgshapiro return inet_pton(family, src, dst); 15490792Sgshapiro} 15590792Sgshapiro#endif /* NETINET6 */ 156