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lhip_net.c
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lhip_net.c
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/*
* LibHideIP - A library for hiding local IP address.
* -- network functions' replacements.
*
* Copyright (C) 2008-2022 Bogdan Drozdowski, bogdro (at) users . sourceforge . net
* Parts of this file are Copyright (C) Free Software Foundation, Inc.
* License: GNU General Public License, v3+
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "lhip_cfg.h"
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_ERRNO_H
# include <errno.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#else
struct hostent
{
char *h_name; /* official name of host */
char **h_aliases; /* alias list */
int h_addrtype; /* host address type */
int h_length; /* length of address */
char **h_addr_list; /* list of addresses */
};
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#else
# define PF_NETLINK 16
# define PF_ROUTE PF_NETLINK /* Alias to emulate 4.4BSD. */
# define AF_NETLINK PF_NETLINK
# define AF_ROUTE PF_ROUTE
struct iovec
{
void *iov_base; /* Pointer to data. */
size_t iov_len; /* Length of data. */
};
struct msghdr
{
void *msg_name; /* optional address */
socklen_t msg_namelen; /* size of address */
struct iovec *msg_iov; /* scatter/gather array */
size_t msg_iovlen; /* # elements in msg_iov */
void *msg_control; /* ancillary data, see below */
socklen_t msg_controllen; /* ancillary data buffer len */
int msg_flags; /* flags on received message */
};
#endif
#ifdef HAVE_IFADDRS_H
# include <ifaddrs.h>
#endif
#ifdef HAVE_NET_IF_H
# include <net/if.h>
#else
# define IFF_BROADCAST 0x2
#endif
#ifdef HAVE_STDLIB_H
# include <stdlib.h> /* sys/socket.h */
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#if (!defined HAVE_NETINET_IN_H) && (!defined HAVE_SYS_SOCKET_H)
struct sockaddr
{
unsigned short int sa_family;
char sa_data[14];
};
typedef unsigned short int in_port_t;
typedef unsigned int in_addr_t;
struct in_addr
{
in_addr_t s_addr;
};
struct in6_addr
{
union
{
unsigned char u6_addr8[16];
unsigned short int u6_addr16[8];
unsigned int u6_addr32[4];
} in6_u;
# define s6_addr in6_u.u6_addr8
# define s6_addr16 in6_u.u6_addr16
# define s6_addr32 in6_u.u6_addr32
};
struct sockaddr_in
{
unsigned short int sin_family;
in_port_t sin_port; /* Port number. */
struct in_addr sin_addr; /* Internet address. */
/* Pad to size of `struct sockaddr'. */
unsigned char sin_zero[sizeof (struct sockaddr) -
sizeof (sin_family) -
sizeof (in_port_t) -
sizeof (struct in_addr)];
};
struct sockaddr_in6
{
unsigned short int sin6_family;
in_port_t sin6_port; /* Transport layer port # */
unsigned int sin6_flowinfo; /* IPv6 flow information */
struct in6_addr sin6_addr; /* IPv6 address */
unsigned int sin6_scope_id; /* IPv6 scope-id */
};
#endif
#ifdef HAVE_STRING_H
# if (!defined STDC_HEADERS) && (defined HAVE_MEMORY_H)
# include <memory.h>
# endif
# include <string.h>
#endif
#ifdef HAVE_ASM_TYPES_H
# include <asm/types.h> /* linux/netlink.h */
#else
typedef unsigned int __u32;
typedef unsigned short int __u16;
#endif
#ifdef HAVE_LINUX_NETLINK_H
# include <linux/netlink.h>
#else
# define NETLINK_ROUTE 0 /* Routing/device hook */
/*# define NETLINK_ROUTE6 11 new systems use NETLINK_ROUTE for both IPv4 and IPv6 */
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* gethostname () */
#endif
/* rpc.h: bindresvport() on FreeBSD */
#ifdef HAVE_RPC_H
# include <rpc.h>
#endif
#ifdef HAVE_RPC_RPC_H
# include <rpc/rpc.h>
#endif
#include "lhip_priv.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifndef HAVE_GETIPNODEBYNAME
extern struct hostent *getipnodebyname LHIP_PARAMS ((const char *name,
int af, int flags, int *error_num));
#endif
#ifndef HAVE_GETIPNODEBYADDR
extern struct hostent *getipnodebyaddr LHIP_PARAMS ((const void *addr,
size_t len, int af, int *error_num));
#endif
#ifndef HAVE_GETHOSTBYADDR_R
extern int gethostbyaddr_r LHIP_PARAMS ((const void *addr, socklen_t len, int type,
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop));
#endif
#ifndef HAVE_GETHOSTBYNAME_R
extern int gethostbyname_r LHIP_PARAMS ((const char *name,
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop));
#endif
#ifndef HAVE_GETHOSTBYNAME2_R
extern int gethostbyname2_r LHIP_PARAMS ((const char *name, int af,
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop));
#endif
#ifndef HAVE_GETHOSTENT_R
extern int gethostent_r LHIP_PARAMS ((
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop));
#endif
#ifndef HAVE_BINDRESVPORT
extern int bindresvport LHIP_PARAMS ((int sockfd, struct sockaddr_in *sin));
#endif
#ifndef HAVE_BINDRESVPORT6
extern int bindresvport6 LHIP_PARAMS ((int sockfd, struct sockaddr_in6 *sin));
#endif
#ifdef __cplusplus
}
#endif
static const unsigned char __lhip_zeroaddr_ipv4[4] = {0, 0, 0, 0};
static const unsigned char __lhip_zeroaddr_ipv6[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
static const char local_name[] = "localhost";
#ifndef AF_NETLINK
# ifdef AF_ROUTE
# define AF_NETLINK AF_ROUTE
# else
# define AF_NETLINK 16
# endif
#endif
#ifndef PF_NETLINK
# define PF_NETLINK AF_NETLINK
#endif
#ifdef TEST_COMPILE
# ifdef LHIP_ANSIC
# define WAS_LHIP_ANSIC
# endif
# undef LHIP_ANSIC
# if TEST_COMPILE > 1
# undef HAVE_MALLOC
# endif
#endif
/* =============================================================== */
struct hostent *
gethostbyaddr (
#ifdef LHIP_ANSIC
const void *addr, socklen_t len, int type)
#else
addr, len, type)
const void *addr;
socklen_t len;
int type;
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
struct hostent * ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostbyaddr()\n");
fflush (stderr);
#endif
if ( __lhip_real_gethostbyaddr_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return NULL;
}
if ( addr == NULL )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyaddr_location ()) (addr, len, type);
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyaddr_location ()) (addr, len, type);
}
ret = (*__lhip_real_gethostbyaddr_location ()) (addr, len, type);
if ( ret != NULL )
{
__lhip_change_data (ret);
}
return ret;
}
/* =============================================================== */
#ifdef HAVE_FUNC_GETHOSTBYADDR_R_8
int
#else /* ! HAVE_FUNC_GETHOSTBYADDR_R_8 */
# ifdef HAVE_FUNC_GETHOSTBYADDR_R_7
/* SunOS */
struct hostent *
# else
int
# endif
#endif /* HAVE_FUNC_GETHOSTBYADDR_R_8 */
gethostbyaddr_r (
#ifdef HAVE_FUNC_GETHOSTBYADDR_R_8
# ifdef LHIP_ANSIC
const void *addr, socklen_t len, int type,
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop)
# else
addr, len, type, ret, buf, buflen, result, h_errnop)
const void *addr;
socklen_t len;
int type;
struct hostent *ret;
char *buf;
size_t buflen;
struct hostent **result;
int *h_errnop;
# endif
#else /* ! HAVE_FUNC_GETHOSTBYADDR_R_8 */
# ifdef HAVE_FUNC_GETHOSTBYADDR_R_7
# ifdef LHIP_ANSIC
const char *addr, int len, int type,
struct hostent *ret, char *buf, int buflen,
int *h_errnop)
# else
addr, len, type, ret, buf, buflen, h_errnop)
const char *addr;
int len;
int type;
struct hostent *ret;
char *buf;
int buflen;
int *h_errnop;
# endif
# else /* ! HAVE_FUNC_GETHOSTBYADDR_R_7 */
# ifdef LHIP_ANSIC
const char *addr, size_t len, int type,
struct hostent *ret, struct hostent_data *data)
# else
addr, len, type, ret, data)
const char *addr;
size_t len;
int type;
struct hostent *ret;
struct hostent_data *data;
# endif
# endif /* HAVE_FUNC_GETHOSTBYADDR_R_7 */
#endif /* HAVE_FUNC_GETHOSTBYADDR_R_8 */
{
LHIP_MAKE_ERRNO_VAR(err);
int my_ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostbyaddr_r()\n");
fflush (stderr);
#endif
if ( __lhip_real_gethostbyaddr_r_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return -1;
}
if ( (addr == NULL) || (ret == NULL) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyaddr_r_location ())
#ifdef HAVE_FUNC_GETHOSTBYADDR_R_8
(addr, len, type, ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTBYADDR_R_8 */
# ifdef HAVE_FUNC_GETHOSTBYADDR_R_7
(addr, len, type, ret, buf, buflen, h_errnop);
# else
(addr, len, type, ret, data);
# endif
#endif /* HAVE_FUNC_GETHOSTBYADDR_R_8 */
#ifdef HAVE_FUNC_GETHOSTBYADDR_R_7
#else
#endif
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyaddr_r_location ())
#ifdef HAVE_FUNC_GETHOSTBYADDR_R_8
(addr, len, type, ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTBYADDR_R_8 */
# ifdef HAVE_FUNC_GETHOSTBYADDR_R_7
(addr, len, type, ret, buf, buflen, h_errnop);
# else
(addr, len, type, ret, data);
# endif
#endif /* HAVE_FUNC_GETHOSTBYADDR_R_8 */
#ifdef HAVE_FUNC_GETHOSTBYADDR_R_7
#else
#endif
}
my_ret = (*__lhip_real_gethostbyaddr_r_location ())
#ifdef HAVE_FUNC_GETHOSTBYADDR_R_8
(addr, len, type, ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTBYADDR_R_8 */
# ifdef HAVE_FUNC_GETHOSTBYADDR_R_7
(addr, len, type, ret, buf, buflen, h_errnop);
# else
(addr, len, type, ret, data);
# endif
#endif /* HAVE_FUNC_GETHOSTBYADDR_R_8 */
if ( my_ret == 0 )
{
__lhip_change_data (ret);
}
return my_ret;
}
/* =============================================================== */
struct hostent *
gethostbyname (
#ifdef LHIP_ANSIC
const char *name)
#else
name)
const char *name;
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
struct hostent * ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostbyname(%s)\n", (name == NULL)? "null" : name);
fflush (stderr);
#endif
if ( __lhip_real_gethostbyname_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return NULL;
}
if ( name == NULL )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname_location ()) (name);
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname_location ()) (name);
}
ret = (*__lhip_real_gethostbyname_location ()) (name);
if ( ret != NULL )
{
__lhip_change_data (ret);
}
return ret;
}
/* =============================================================== */
#ifdef HAVE_FUNC_GETHOSTBYNAME_R_6
int
#else /* ! HAVE_FUNC_GETHOSTBYNAME_R_6 */
# ifdef HAVE_FUNC_GETHOSTBYNAME_R_5
struct hostent *
# else /* ! HAVE_FUNC_GETHOSTBYNAME_R_5 */
int
# endif /* HAVE_FUNC_GETHOSTBYNAME_R_5 */
#endif /* HAVE_FUNC_GETHOSTBYNAME_R_6 */
gethostbyname_r (
#ifdef HAVE_FUNC_GETHOSTBYNAME_R_6
# ifdef LHIP_ANSIC
const char *name,
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop)
# else
name, ret, buf, buflen, result, h_errnop)
const char *name;
struct hostent *ret;
char *buf;
size_t buflen;
struct hostent **result;
int *h_errnop;
# endif
#else /* ! HAVE_FUNC_GETHOSTBYNAME_R_6 */
# ifdef HAVE_FUNC_GETHOSTBYNAME_R_5
# ifdef LHIP_ANSIC
const char *name,
struct hostent *ret, char *buf, int buflen,
int *h_errnop)
# else
name, ret, buf, buflen, h_errnop)
const char *name;
struct hostent *ret;
char *buf;
int buflen;
int *h_errnop;
# endif
# else /* ! HAVE_FUNC_GETHOSTBYNAME_R_5 */
# ifdef LHIP_ANSIC
const char *name,
struct hostent *ret, struct hostent_data *data)
# else
name, ret, data)
const char *name;
struct hostent *ret;
struct hostent_data *data;
# endif
# endif /* HAVE_FUNC_GETHOSTBYNAME_R_5 */
#endif /* HAVE_FUNC_GETHOSTBYNAME_R_6 */
{
LHIP_MAKE_ERRNO_VAR(err);
int my_ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostbyname_r(%s)\n", (name == NULL)? "null" : name);
fflush (stderr);
#endif
if ( __lhip_real_gethostbyname_r_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return -1;
}
if ( (name == NULL) || (ret == NULL) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname_r_location ())
#ifdef HAVE_FUNC_GETHOSTBYNAME_R_6
(name, ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTBYNAME_R_6 */
# ifdef HAVE_FUNC_GETHOSTBYNAME_R_5
(name, ret, buf, buflen, h_errnop);
# else /* ! HAVE_FUNC_GETHOSTBYNAME_R_5 */
(name, ret, data);
# endif /* HAVE_FUNC_GETHOSTBYNAME_R_5 */
#endif /* HAVE_FUNC_GETHOSTBYNAME_R_6 */
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname_r_location ())
#ifdef HAVE_FUNC_GETHOSTBYNAME_R_6
(name, ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTBYNAME_R_6 */
# ifdef HAVE_FUNC_GETHOSTBYNAME_R_5
(name, ret, buf, buflen, h_errnop);
# else /* ! HAVE_FUNC_GETHOSTBYNAME_R_5 */
(name, ret, data);
# endif /* HAVE_FUNC_GETHOSTBYNAME_R_5 */
#endif /* HAVE_FUNC_GETHOSTBYNAME_R_6 */
}
my_ret = (*__lhip_real_gethostbyname_r_location ())
#ifdef HAVE_FUNC_GETHOSTBYNAME_R_6
(name, ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTBYNAME_R_6 */
# ifdef HAVE_FUNC_GETHOSTBYNAME_R_5
(name, ret, buf, buflen, h_errnop);
# else /* ! HAVE_FUNC_GETHOSTBYNAME_R_5 */
(name, ret, data);
# endif /* HAVE_FUNC_GETHOSTBYNAME_R_5 */
#endif /* HAVE_FUNC_GETHOSTBYNAME_R_6 */
if ( my_ret == 0 )
{
__lhip_change_data (ret);
}
return my_ret;
}
/* =============================================================== */
struct hostent *
gethostbyname2 (
#ifdef LHIP_ANSIC
const char *name, int af)
#else
name, af)
const char *name;
int af;
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
struct hostent * ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostbyname2(%s)\n", (name == NULL)? "null" : name);
fflush (stderr);
#endif
if ( __lhip_real_gethostbyname2_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return NULL;
}
if ( name == NULL )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname2_location ()) (name, af);
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname2_location ()) (name, af);
}
ret = (*__lhip_real_gethostbyname2_location ()) (name, af);
if ( ret != NULL )
{
__lhip_change_data (ret);
}
return ret;
}
/* =============================================================== */
int
gethostbyname2_r (
#ifdef LHIP_ANSIC
const char *name, int af,
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop)
#else
name, af, ret, buf, buflen, result, h_errnop)
const char *name;
int af;
struct hostent *ret;
char *buf;
size_t buflen;
struct hostent **result;
int *h_errnop;
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
int my_ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostbyname2_r(%s)\n", (name == NULL)? "null" : name);
fflush (stderr);
#endif
if ( __lhip_real_gethostbyname2_r_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return -1;
}
if ( (name == NULL) || (ret == NULL) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname2_r_location ())
(name, af, ret, buf, buflen, result, h_errnop);
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostbyname2_r_location ())
(name, af, ret, buf, buflen, result, h_errnop);
}
my_ret = (*__lhip_real_gethostbyname2_r_location ())
(name, af, ret, buf, buflen, result, h_errnop);
if ( my_ret == 0 )
{
__lhip_change_data (ret);
}
return my_ret;
}
/* =============================================================== */
struct hostent *
gethostent (
#ifdef LHIP_ANSIC
void)
#else
)
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
struct hostent * ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostent()\n");
fflush (stderr);
#endif
if ( __lhip_real_gethostent_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return NULL;
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostent_location ()) ();
}
ret = (*__lhip_real_gethostent_location ()) ();
if ( ret != NULL )
{
__lhip_change_data (ret);
}
return ret;
}
/* =============================================================== */
#ifdef HAVE_FUNC_GETHOSTENT_R_5
int
#else /* ! HAVE_FUNC_GETHOSTENT_R_5 */
# ifdef HAVE_FUNC_GETHOSTENT_R_4
struct hostent *
# else /* ! HAVE_FUNC_GETHOSTENT_R_4 */
int
# endif /* HAVE_FUNC_GETHOSTENT_R_4 */
#endif /* HAVE_FUNC_GETHOSTENT_R_5 */
gethostent_r (
#ifdef HAVE_FUNC_GETHOSTENT_R_5
# ifdef LHIP_ANSIC
struct hostent *ret, char *buf, size_t buflen,
struct hostent **result, int *h_errnop)
# else
ret, buf, buflen,result, h_errnop)
struct hostent *ret;
char *buf;
size_t buflen;
struct hostent **result;
int *h_errnop;
# endif
#else /* ! HAVE_FUNC_GETHOSTENT_R_5 */
# ifdef HAVE_FUNC_GETHOSTENT_R_4
# ifdef LHIP_ANSIC
struct hostent *ret, char *buf,
int buflen, int *h_errnop)
# else
ret, buf, buflen, h_errnop)
struct hostent *ret;
char *buf;
int buflen;
int *h_errnop;
# endif
# else /* ! HAVE_FUNC_GETHOSTENT_R_4 */
# ifdef LHIP_ANSIC
struct hostent *htent, struct hostent_data *ht_data)
# else
htent, ht_data)
struct hostent *htent;
struct hostent_data *ht_data;
# endif
# endif /* HAVE_FUNC_GETHOSTENT_R_4 */
#endif /* HAVE_FUNC_GETHOSTENT_R_5 */
{
LHIP_MAKE_ERRNO_VAR(err);
int my_ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: gethostent_r()\n");
fflush (stderr);
#endif
if ( __lhip_real_gethostent_r_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return -1;
}
if ( ret == NULL )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostent_r_location ())
#ifdef HAVE_FUNC_GETHOSTENT_R_5
(ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTENT_R_5 */
# ifdef HAVE_FUNC_GETHOSTENT_R_4
(ret, buf, buflen, h_errnop);
# else /* ! HAVE_FUNC_GETHOSTENT_R_4 */
(htent, ht_data);
# endif /* HAVE_FUNC_GETHOSTENT_R_4 */
#endif /* HAVE_FUNC_GETHOSTENT_R_5 */
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_gethostent_r_location ())
#ifdef HAVE_FUNC_GETHOSTENT_R_5
(ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTENT_R_5 */
# ifdef HAVE_FUNC_GETHOSTENT_R_4
(ret, buf, buflen, h_errnop);
# else /* ! HAVE_FUNC_GETHOSTENT_R_4 */
(htent, ht_data);
# endif /* HAVE_FUNC_GETHOSTENT_R_4 */
#endif /* HAVE_FUNC_GETHOSTENT_R_5 */
}
my_ret = (*__lhip_real_gethostent_r_location ())
#ifdef HAVE_FUNC_GETHOSTENT_R_5
(ret, buf, buflen, result, h_errnop);
#else /* ! HAVE_FUNC_GETHOSTENT_R_5 */
# ifdef HAVE_FUNC_GETHOSTENT_R_4
(ret, buf, buflen, h_errnop);
# else /* ! HAVE_FUNC_GETHOSTENT_R_4 */
(htent, ht_data);
# endif /* HAVE_FUNC_GETHOSTENT_R_4 */
#endif /* HAVE_FUNC_GETHOSTENT_R_5 */
if ( my_ret == 0 )
{
__lhip_change_data (ret);
}
return my_ret;
}
/* =============================================================== */
struct hostent *
getipnodebyaddr (
#ifdef LHIP_ANSIC
const void *addr, size_t len, int af, int *error_num)
#else
addr, len, af, error_num)
const void *addr;
size_t len;
int af;
int *error_num;
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
struct hostent * ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: getipnodebyaddr()\n");
fflush (stderr);
#endif
if ( __lhip_real_getipnodebyaddr_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return NULL;
}
if ( addr == NULL )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_getipnodebyaddr_location ())
(addr, len, af, error_num);
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_getipnodebyaddr_location ())
(addr, len, af, error_num);
}
ret = (*__lhip_real_getipnodebyaddr_location ())
(addr, len, af, error_num);
if ( ret != NULL )
{
__lhip_change_data (ret);
}
return ret;
}
/* =============================================================== */
struct hostent *
getipnodebyname (
#ifdef LHIP_ANSIC
const char *name, int af, int flags, int *error_num)
#else
name, af, flags, error_num)
const char *name;
int af;
int flags;
int *error_num;
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
struct hostent * ret;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: getipnodebyname(%s)\n", (name == NULL)? "null" : name);
fflush (stderr);
#endif
if ( __lhip_real_getipnodebyname_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return NULL;
}
if ( name == NULL )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_getipnodebyname_location ())
(name, af, flags, error_num);
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_getipnodebyname_location ())
(name, af, flags, error_num);
}
ret = (*__lhip_real_getipnodebyname_location ())
(name, af, flags, error_num);
if ( ret != NULL )
{
__lhip_change_data (ret);
}
return ret;
}
/* =============================================================== */
int
getifaddrs (
#ifdef LHIP_ANSIC
struct ifaddrs **__ifap)
#else
__ifap)
struct ifaddrs **__ifap;
#endif
{
LHIP_MAKE_ERRNO_VAR(err);
int ret;
struct ifaddrs *tmp;
__lhip_main ();
#ifdef LHIP_DEBUG
fprintf (stderr, "libhideip: getifaddrs()\n");
fflush (stderr);
#endif
if ( __lhip_real_getifaddrs_location () == NULL )
{
LHIP_SET_ERRNO_MISSING();
return -1;
}
if ( __ifap == NULL )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_getifaddrs_location ()) (__ifap);
}
if ( (__lhip_check_prog_ban () != 0)
|| (__lhip_get_init_stage() != LHIP_INIT_STAGE_FULLY_INITIALIZED) )
{
LHIP_SET_ERRNO(err);
return (*__lhip_real_getifaddrs_location ()) (__ifap);
}
ret = (*__lhip_real_getifaddrs_location ()) (__ifap);
if ( ret == 0 )
{
tmp = *__ifap;
while ( tmp != NULL )
{
if ( tmp->ifa_addr == NULL )
{
tmp = tmp->ifa_next;
continue;