diff options
Diffstat (limited to 'contrib/sendmail/libmilter/sm_gethost.c')
| -rw-r--r-- | contrib/sendmail/libmilter/sm_gethost.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/contrib/sendmail/libmilter/sm_gethost.c b/contrib/sendmail/libmilter/sm_gethost.c new file mode 100644 index 000000000000..2423c34419c1 --- /dev/null +++ b/contrib/sendmail/libmilter/sm_gethost.c @@ -0,0 +1,176 @@ +/* + * Copyright (c) 1999-2001, 2004, 2010, 2013 Proofpoint, Inc. and its suppliers. + * All rights reserved. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + * + */ + +#include <sm/gen.h> +SM_RCSID("@(#)$Id: sm_gethost.c,v 8.32 2013-11-22 20:51:36 ca Exp $") + +#include <sendmail.h> +#if NETINET || NETINET6 +# include <arpa/inet.h> +#endif /* NETINET || NETINET6 */ +#include "libmilter.h" + +/* +** MI_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX +** +** Some operating systems have wierd problems with the gethostbyXXX +** routines. For example, Solaris versions at least through 2.3 +** don't properly deliver a canonical h_name field. This tries to +** work around these problems. +** +** Support IPv6 as well as IPv4. +*/ + +#if NETINET6 && NEEDSGETIPNODE + +static struct hostent *sm_getipnodebyname __P((const char *, int, int, int *)); + +# ifndef AI_ADDRCONFIG +# define AI_ADDRCONFIG 0 /* dummy */ +# endif /* ! AI_ADDRCONFIG */ +# ifndef AI_ALL +# define AI_ALL 0 /* dummy */ +# endif /* ! AI_ALL */ +# ifndef AI_DEFAULT +# define AI_DEFAULT 0 /* dummy */ +# endif /* ! AI_DEFAULT */ + +static struct hostent * +sm_getipnodebyname(name, family, flags, err) + const char *name; + int family; + int flags; + int *err; +{ + bool resv6 = true; + struct hostent *h; + + if (family == AF_INET6) + { + /* From RFC2133, section 6.1 */ + resv6 = bitset(RES_USE_INET6, _res.options); + _res.options |= RES_USE_INET6; + } + SM_SET_H_ERRNO(0); + h = gethostbyname(name); + if (family == AF_INET6 && !resv6) + _res.options &= ~RES_USE_INET6; + + /* the function is supposed to return only the requested family */ + if (h != NULL && h->h_addrtype != family) + { +# if NETINET6 + freehostent(h); +# endif /* NETINET6 */ + h = NULL; + *err = NO_DATA; + } + else + *err = h_errno; + return h; +} + +void +freehostent(h) + struct hostent *h; +{ + /* + ** Stub routine -- if they don't have getipnodeby*(), + ** they probably don't have the free routine either. + */ + + return; +} +#else /* NEEDSGETIPNODE && NETINET6 */ +#define sm_getipnodebyname getipnodebyname +#endif /* NEEDSGETIPNODE && NETINET6 */ + +struct hostent * +mi_gethostbyname(name, family) + char *name; + int family; +{ + struct hostent *h = NULL; +#if (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) +# if SOLARIS == 20300 || SOLARIS == 203 + static struct hostent hp; + static char buf[1000]; + extern struct hostent *_switch_gethostbyname_r(); + + h = _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); +# else /* SOLARIS == 20300 || SOLARIS == 203 */ + extern struct hostent *__switch_gethostbyname(); + + h = __switch_gethostbyname(name); +# endif /* SOLARIS == 20300 || SOLARIS == 203 */ +#else /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ +# if NETINET6 +# ifndef SM_IPNODEBYNAME_FLAGS + /* For IPv4-mapped addresses, use: AI_DEFAULT|AI_ALL */ +# define SM_IPNODEBYNAME_FLAGS AI_ADDRCONFIG +# endif /* SM_IPNODEBYNAME_FLAGS */ + + int flags = SM_IPNODEBYNAME_FLAGS; + int err; +# endif /* NETINET6 */ + +# if NETINET6 +# if ADDRCONFIG_IS_BROKEN + flags &= ~AI_ADDRCONFIG; +# endif /* ADDRCONFIG_IS_BROKEN */ + h = sm_getipnodebyname(name, family, flags, &err); + SM_SET_H_ERRNO(err); +# else /* NETINET6 */ + h = gethostbyname(name); +# endif /* NETINET6 */ + +#endif /* (SOLARIS > 10000 && SOLARIS < 20400) || (defined(SOLARIS) && SOLARIS < 204) || (defined(sony_news) && defined(__svr4)) */ + + /* the function is supposed to return only the requested family */ + if (h != NULL && h->h_addrtype != family) + { +# if NETINET6 + freehostent(h); +# endif /* NETINET6 */ + h = NULL; + SM_SET_H_ERRNO(NO_DATA); + } + return h; +} + +#if NETINET6 +/* +** MI_INET_PTON -- convert printed form to network address. +** +** Wrapper for inet_pton() which handles IPv6: labels. +** +** Parameters: +** family -- address family +** src -- string +** dst -- destination address structure +** +** Returns: +** 1 if the address was valid +** 0 if the address wasn't parseable +** -1 if error +*/ + +int +mi_inet_pton(family, src, dst) + int family; + const char *src; + void *dst; +{ + if (family == AF_INET6 && + strncasecmp(src, "IPv6:", 5) == 0) + src += 5; + return inet_pton(family, src, dst); +} +#endif /* NETINET6 */ |