+/*
+ * Copyright (c) 1999-2003 Damien Miller. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
#ifndef _DEFINES_H
#define _DEFINES_H
/* $Id$ */
-/* Necessary headers */
-
-#include <sys/types.h> /* For [u]intxx_t */
-#include <sys/socket.h> /* For SHUT_XXXX */
-#include <sys/param.h> /* For MAXPATHLEN and roundup() */
-#include <netinet/in_systm.h> /* For typedefs */
-#include <netinet/in.h> /* For IPv6 macros */
-#include <netinet/ip.h> /* For IPTOS macros */
-#ifdef HAVE_SYS_UN_H
-# include <sys/un.h> /* For SUN_LEN */
-#endif
-#ifdef HAVE_SYS_BITYPES_H
-# include <sys/bitypes.h> /* For u_intXX_t */
-#endif
-#ifdef HAVE_PATHS_H
-# include <paths.h> /* For _PATH_XXX */
-#endif
-#ifdef HAVE_LIMITS_H
-# include <limits.h> /* For PATH_MAX */
-#endif
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h> /* For timersub */
-#endif
-#ifdef HAVE_MAILLOCK_H
-# include <maillock.h> /* For _PATH_MAILDIR */
-#endif
-#ifdef HAVE_SYS_CDEFS_H
-# include <sys/cdefs.h> /* For __P() */
-#endif
-#ifdef HAVE_SYS_SYSMACROS_H
-# include <sys/sysmacros.h> /* For MIN, MAX, etc */
-#endif
-#ifdef HAVE_SYS_STAT_H
-# include <sys/stat.h> /* For S_* constants and macros */
-#endif
-#ifdef HAVE_NEXT
-# include <libc.h>
-#endif
-
-#include <unistd.h> /* For STDIN_FILENO, etc */
-#include <termios.h> /* Struct winsize */
-#include <fcntl.h> /* For O_NONBLOCK */
-
-/* *-*-nto-qnx needs these headers for strcasecmp and LASTLOG_FILE respectively */
-#ifdef HAVE_STRINGS_H
-# include <strings.h>
-#endif
-#ifdef HAVE_LOGIN_H
-# include <login.h>
-#endif
-
/* Constants */
-#ifndef SHUT_RDWR
+#if defined(HAVE_DECL_SHUT_RD) && HAVE_DECL_SHUT_RD == 0
enum
{
SHUT_RD = 0, /* No more receptions. */
# ifdef PATH_MAX
# define MAXPATHLEN PATH_MAX
# else /* PATH_MAX */
-# define MAXPATHLEN 64 /* Should be safe */
+# define MAXPATHLEN 64
+/* realpath uses a fixed buffer of size MAXPATHLEN, so force use of ours */
+# ifndef BROKEN_REALPATH
+# define BROKEN_REALPATH 1
+# endif /* BROKEN_REALPATH */
# endif /* PATH_MAX */
#endif /* MAXPATHLEN */
+#ifndef PATH_MAX
+# ifdef _POSIX_PATH_MAX
+# define PATH_MAX _POSIX_PATH_MAX
+# endif
+#endif
+
+#if defined(HAVE_DECL_MAXSYMLINKS) && HAVE_DECL_MAXSYMLINKS == 0
+# define MAXSYMLINKS 5
+#endif
+
#ifndef STDIN_FILENO
# define STDIN_FILENO 0
#endif
#endif
#endif
-#ifndef O_NONBLOCK /* Non Blocking Open */
-# define O_NONBLOCK 00004
+#if defined(HAVE_DECL_O_NONBLOCK) && HAVE_DECL_O_NONBLOCK == 0
+# define O_NONBLOCK 00004 /* Non Blocking Open */
#endif
#ifndef S_ISDIR
# define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
#endif /* S_ISDIR */
-#ifndef S_ISREG
+#ifndef S_ISREG
# define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
#endif /* S_ISREG */
# define S_IRWXO 0000007 /* read, write, execute */
#endif /* S_IXUSR */
+#if !defined(MAP_ANON) && defined(MAP_ANONYMOUS)
+#define MAP_ANON MAP_ANONYMOUS
+#endif
+
+#ifndef MAP_FAILED
+# define MAP_FAILED ((void *)-1)
+#endif
+
/* *-*-nto-qnx doesn't define this constant in the system headers */
#ifdef MISSING_NFDBITS
# define NFDBITS (8 * sizeof(unsigned long))
#endif
+/*
+SCO Open Server 3 has INADDR_LOOPBACK defined in rpc/rpc.h but
+including rpc/rpc.h breaks Solaris 6
+*/
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK ((u_long)0x7f000001)
+#endif
+
/* Types */
/* If sys/types.h does not supply intXX_t, supply them ourselves */
/* (or die trying) */
-
#ifndef HAVE_U_INT
typedef unsigned int u_int;
#endif
# if (SIZEOF_SHORT_INT == 2)
typedef short int int16_t;
# else
-# ifdef _CRAY
+# ifdef _UNICOS
+# if (SIZEOF_SHORT_INT == 4)
+typedef short int16_t;
+# else
typedef long int16_t;
+# endif
# else
# error "16 bit int type not found."
-# endif /* _CRAY */
+# endif /* _UNICOS */
# endif
# if (SIZEOF_INT == 4)
typedef int int32_t;
# else
-# ifdef _CRAY
+# ifdef _UNICOS
typedef long int32_t;
# else
# error "32 bit int type not found."
-# endif /* _CRAY */
+# endif /* _UNICOS */
# endif
#endif
# if (SIZEOF_SHORT_INT == 2)
typedef unsigned short int u_int16_t;
# else
-# ifdef _CRAY
+# ifdef _UNICOS
+# if (SIZEOF_SHORT_INT == 4)
+typedef unsigned short u_int16_t;
+# else
typedef unsigned long u_int16_t;
+# endif
# else
# error "16 bit int type not found."
# endif
# if (SIZEOF_INT == 4)
typedef unsigned int u_int32_t;
# else
-# ifdef _CRAY
+# ifdef _UNICOS
typedef unsigned long u_int32_t;
# else
# error "32 bit int type not found."
#ifndef HAVE_INT64_T
# if (SIZEOF_LONG_INT == 8)
typedef long int int64_t;
-# define HAVE_INT64_T 1
# else
# if (SIZEOF_LONG_LONG_INT == 8)
typedef long long int int64_t;
-# define HAVE_INT64_T 1
# endif
# endif
#endif
#ifndef HAVE_U_INT64_T
# if (SIZEOF_LONG_INT == 8)
typedef unsigned long int u_int64_t;
-# define HAVE_U_INT64_T 1
# else
# if (SIZEOF_LONG_LONG_INT == 8)
typedef unsigned long long int u_int64_t;
-# define HAVE_U_INT64_T 1
# endif
# endif
#endif
-#if !defined(HAVE_LONG_LONG_INT) && (SIZEOF_LONG_LONG_INT == 8)
-# define HAVE_LONG_LONG_INT 1
-#endif
#ifndef HAVE_U_CHAR
typedef unsigned char u_char;
# define HAVE_U_CHAR
#endif /* HAVE_U_CHAR */
-#ifndef HAVE_SOCKLEN_T
-typedef unsigned int socklen_t;
-# define HAVE_SOCKLEN_T
-#endif /* HAVE_SOCKLEN_T */
+#ifndef SIZE_T_MAX
+#define SIZE_T_MAX ULONG_MAX
+#endif /* SIZE_T_MAX */
#ifndef HAVE_SIZE_T
typedef unsigned int size_t;
# define HAVE_SIZE_T
+# define SIZE_T_MAX UINT_MAX
#endif /* HAVE_SIZE_T */
#ifndef HAVE_SSIZE_T
# define HAVE_PID_T
#endif /* HAVE_PID_T */
+#ifndef HAVE_SIG_ATOMIC_T
+typedef int sig_atomic_t;
+# define HAVE_SIG_ATOMIC_T
+#endif /* HAVE_SIG_ATOMIC_T */
+
#ifndef HAVE_MODE_T
typedef int mode_t;
# define HAVE_MODE_T
};
#endif /* HAVE_SYS_UN_H */
+#ifndef HAVE_IN_ADDR_T
+typedef u_int32_t in_addr_t;
+#endif
+#ifndef HAVE_IN_PORT_T
+typedef u_int16_t in_port_t;
+#endif
+
#if defined(BROKEN_SYS_TERMIO_H) && !defined(_STRUCT_WINSIZE)
#define _STRUCT_WINSIZE
struct winsize {
#ifndef _PATH_BSHELL
# define _PATH_BSHELL "/bin/sh"
#endif
-#ifndef _PATH_CSHELL
-# define _PATH_CSHELL "/bin/csh"
-#endif
-#ifndef _PATH_SHELLS
-# define _PATH_SHELLS "/etc/shells"
-#endif
#ifdef USER_PATH
# ifdef _PATH_STDPATH
# define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
#endif
+#ifndef SUPERUSER_PATH
+# define SUPERUSER_PATH _PATH_STDPATH
+#endif
+
#ifndef _PATH_DEVNULL
# define _PATH_DEVNULL "/dev/null"
#endif
# define _PATH_MAILDIR MAILDIR
#endif /* !defined(_PATH_MAILDIR) && defined(MAILDIR) */
-#ifndef _PATH_RSH
-# ifdef RSH_PATH
-# define _PATH_RSH RSH_PATH
-# else /* RSH_PATH */
-# define _PATH_RSH "/usr/bin/rsh"
-# endif /* RSH_PATH */
-#endif /* _PATH_RSH */
-
#ifndef _PATH_NOLOGIN
# define _PATH_NOLOGIN "/etc/nologin"
#endif
#define _PATH_XAUTH XAUTH_PATH
#endif /* XAUTH_PATH */
+/* derived from XF4/xc/lib/dps/Xlibnet.h */
+#ifndef X_UNIX_PATH
+# ifdef __hpux
+# define X_UNIX_PATH "/var/spool/sockets/X11/%u"
+# else
+# define X_UNIX_PATH "/tmp/.X11-unix/X%u"
+# endif
+#endif /* X_UNIX_PATH */
+#define _PATH_UNIX_X X_UNIX_PATH
+
#ifndef _PATH_TTY
# define _PATH_TTY "/dev/tty"
#endif
} while (0)
#endif
+#ifndef TIMEVAL_TO_TIMESPEC
+#define TIMEVAL_TO_TIMESPEC(tv, ts) { \
+ (ts)->tv_sec = (tv)->tv_sec; \
+ (ts)->tv_nsec = (tv)->tv_usec * 1000; \
+}
+#endif
+
+#ifndef TIMESPEC_TO_TIMEVAL
+#define TIMESPEC_TO_TIMEVAL(tv, ts) { \
+ (tv)->tv_sec = (ts)->tv_sec; \
+ (tv)->tv_usec = (ts)->tv_nsec / 1000; \
+}
+#endif
+
#ifndef __P
# define __P(x) x
#endif
# define __attribute__(x)
#endif /* !defined(__GNUC__) || (__GNUC__ < 2) */
-#ifndef SUN_LEN
-#define SUN_LEN(su) \
- (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
-#endif /* SUN_LEN */
+#if !defined(HAVE_ATTRIBUTE__SENTINEL__) && !defined(__sentinel__)
+# define __sentinel__
+#endif
+
+#if !defined(HAVE_ATTRIBUTE__BOUNDED__) && !defined(__bounded__)
+# define __bounded__(x, y, z)
+#endif
+
+#if !defined(HAVE_ATTRIBUTE__NONNULL__) && !defined(__nonnull__)
+# define __nonnull__(x)
+#endif
/* *-*-nto-qnx doesn't define this macro in the system headers */
#ifdef MISSING_HOWMANY
# define howmany(x,y) (((x)+((y)-1))/(y))
#endif
+#ifndef OSSH_ALIGNBYTES
+#define OSSH_ALIGNBYTES (sizeof(int) - 1)
+#endif
+#ifndef __CMSG_ALIGN
+#define __CMSG_ALIGN(p) (((u_int)(p) + OSSH_ALIGNBYTES) &~ OSSH_ALIGNBYTES)
+#endif
+
+/* Length of the contents of a control message of length len */
+#ifndef CMSG_LEN
+#define CMSG_LEN(len) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
+#endif
+
+/* Length of the space taken up by a padded control message of length len */
+#ifndef CMSG_SPACE
+#define CMSG_SPACE(len) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(len))
+#endif
+
+/* given pointer to struct cmsghdr, return pointer to data */
+#ifndef CMSG_DATA
+#define CMSG_DATA(cmsg) ((u_char *)(cmsg) + __CMSG_ALIGN(sizeof(struct cmsghdr)))
+#endif /* CMSG_DATA */
+
+/*
+ * RFC 2292 requires to check msg_controllen, in case that the kernel returns
+ * an empty list for some reasons.
+ */
+#ifndef CMSG_FIRSTHDR
+#define CMSG_FIRSTHDR(mhdr) \
+ ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
+ (struct cmsghdr *)(mhdr)->msg_control : \
+ (struct cmsghdr *)NULL)
+#endif /* CMSG_FIRSTHDR */
+
+#if defined(HAVE_DECL_OFFSETOF) && HAVE_DECL_OFFSETOF == 0
+# define offsetof(type, member) ((size_t) &((type *)0)->member)
+#endif
+
+/* Set up BSD-style BYTE_ORDER definition if it isn't there already */
+/* XXX: doesn't try to cope with strange byte orders (PDP_ENDIAN) */
+#ifndef BYTE_ORDER
+# ifndef LITTLE_ENDIAN
+# define LITTLE_ENDIAN 1234
+# endif /* LITTLE_ENDIAN */
+# ifndef BIG_ENDIAN
+# define BIG_ENDIAN 4321
+# endif /* BIG_ENDIAN */
+# ifdef WORDS_BIGENDIAN
+# define BYTE_ORDER BIG_ENDIAN
+# else /* WORDS_BIGENDIAN */
+# define BYTE_ORDER LITTLE_ENDIAN
+# endif /* WORDS_BIGENDIAN */
+#endif /* BYTE_ORDER */
+
/* Function replacement / compatibility hacks */
-/* In older versions of libpam, pam_strerror takes a single argument */
-#ifdef HAVE_OLD_PAM
-# define PAM_STRERROR(a,b) pam_strerror((b))
-#else
-# define PAM_STRERROR(a,b) pam_strerror((a),(b))
+#if !defined(HAVE_GETADDRINFO) && (defined(HAVE_OGETADDRINFO) || defined(HAVE_NGETADDRINFO))
+# define HAVE_GETADDRINFO
#endif
-#ifdef PAM_SUN_CODEBASE
-# define PAM_MSG_MEMBER(msg, n, member) ((*(msg))[(n)].member)
-#else
-# define PAM_MSG_MEMBER(msg, n, member) ((msg)[(n)]->member)
+#ifndef HAVE_GETOPT_OPTRESET
+# undef getopt
+# undef opterr
+# undef optind
+# undef optopt
+# undef optreset
+# undef optarg
+# define getopt(ac, av, o) BSDgetopt(ac, av, o)
+# define opterr BSDopterr
+# define optind BSDoptind
+# define optopt BSDoptopt
+# define optreset BSDoptreset
+# define optarg BSDoptarg
#endif
#if defined(BROKEN_GETADDRINFO) && defined(HAVE_GETADDRINFO)
# undef HAVE_GAI_STRERROR
#endif
+#if defined(BROKEN_UPDWTMPX) && defined(HAVE_UPDWTMPX)
+# undef HAVE_UPDWTMPX
+#endif
+
+#if defined(BROKEN_SHADOW_EXPIRE) && defined(HAS_SHADOW_EXPIRE)
+# undef HAS_SHADOW_EXPIRE
+#endif
+
+#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT) && \
+ defined(SYSLOG_R_SAFE_IN_SIGHAND)
+# define DO_LOG_SAFE_IN_SIGHAND
+#endif
+
#if !defined(HAVE_MEMMOVE) && defined(HAVE_BCOPY)
# define memmove(s1, s2, n) bcopy((s2), (s1), (n))
#endif /* !defined(HAVE_MEMMOVE) && defined(HAVE_BCOPY) */
-#if !defined(HAVE_ATEXIT) && defined(HAVE_ON_EXIT)
-# define atexit(a, NULL) on_exit(a, NULL)
-#else
-# if defined(HAVE_XATEXIT)
-# define atexit(a) xatexit(a)
-# endif /* defined(HAVE_XATEXIT) */
-#endif /* !defined(HAVE_ATEXIT) && defined(HAVE_ON_EXIT) */
-
#if defined(HAVE_VHANGUP) && !defined(HAVE_DEV_PTMX)
# define USE_VHANGUP
#endif /* defined(HAVE_VHANGUP) && !defined(HAVE_DEV_PTMX) */
#ifndef GETPGRP_VOID
+# include <unistd.h>
# define getpgrp() getpgrp(0)
#endif
+#ifdef USE_BSM_AUDIT
+# define SSH_AUDIT_EVENTS
+# define CUSTOM_SSH_AUDIT_EVENTS
+#endif
+
+#if !defined(HAVE___func__) && defined(HAVE___FUNCTION__)
+# define __func__ __FUNCTION__
+#elif !defined(HAVE___func__)
+# define __func__ ""
+#endif
+
+#if defined(KRB5) && !defined(HEIMDAL)
+# define krb5_get_err_text(context,code) error_message(code)
+#endif
+
+#if defined(SKEYCHALLENGE_4ARG)
+# define _compat_skeychallenge(a,b,c,d) skeychallenge(a,b,c,d)
+#else
+# define _compat_skeychallenge(a,b,c,d) skeychallenge(a,b,c)
+#endif
+
+/* Maximum number of file descriptors available */
+#ifdef HAVE_SYSCONF
+# define SSH_SYSFDMAX sysconf(_SC_OPEN_MAX)
+#else
+# define SSH_SYSFDMAX 10000
+#endif
+
+#ifdef FSID_HAS_VAL
+/* encode f_fsid into a 64 bit value */
+#define FSID_TO_ULONG(f) \
+ ((((u_int64_t)(f).val[0] & 0xffffffffUL) << 32) | \
+ ((f).val[1] & 0xffffffffUL))
+#elif defined(FSID_HAS___VAL)
+#define FSID_TO_ULONG(f) \
+ ((((u_int64_t)(f).__val[0] & 0xffffffffUL) << 32) | \
+ ((f).__val[1] & 0xffffffffUL))
+#else
+# define FSID_TO_ULONG(f) ((f))
+#endif
+
+#if defined(__Lynx__)
+ /*
+ * LynxOS defines these in param.h which we do not want to include since
+ * it will also pull in a bunch of kernel definitions.
+ */
+# define ALIGNBYTES (sizeof(int) - 1)
+# define ALIGN(p) (((unsigned)p + ALIGNBYTES) & ~ALIGNBYTES)
+ /* Missing prototypes on LynxOS */
+ int snprintf (char *, size_t, const char *, ...);
+ int mkstemp (char *);
+ char *crypt (const char *, const char *);
+ int seteuid (uid_t);
+ int setegid (gid_t);
+ char *mkdtemp (char *);
+ int rresvport_af (int *, sa_family_t);
+ int innetgr (const char *, const char *, const char *, const char *);
+#endif
+
/*
* Define this to use pipes instead of socketpairs for communicating with the
* client program. Socketpairs do not seem to work on all systems.
*
- * configure.in sets this for a few OS's which are known to have problems
+ * configure.ac sets this for a few OS's which are known to have problems
* but you may need to set it yourself
*/
/* #define USE_PIPES 1 */
** login recorder definitions
**/
-/* preprocess */
-
-#ifdef HAVE_UTMP_H
-# ifdef HAVE_TIME_IN_UTMP
-# include <time.h>
-# endif
-# include <utmp.h>
-#endif
-#ifdef HAVE_UTMPX_H
-# ifdef HAVE_TV_IN_UTMPX
-# include <sys/time.h>
-# endif
-# include <utmpx.h>
-#endif
-#ifdef HAVE_LASTLOG_H
-# include <lastlog.h>
-#endif
-#ifdef HAVE_PATHS_H
-# include <paths.h>
-#endif
-
/* FIXME: put default paths back in */
#ifndef UTMP_FILE
# ifdef _PATH_UTMP
# endif
#endif
+#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
+# define USE_SHADOW
+#endif
/* The login() library function in libutil is first choice */
#if defined(HAVE_LOGIN) && !defined(DISABLE_LOGIN)
#endif
+#ifndef UT_LINESIZE
+# define UT_LINESIZE 8
+#endif
+
/* I hope that the presence of LASTLOG_FILE is enough to detect this */
#if defined(LASTLOG_FILE) && !defined(DISABLE_LASTLOG)
# define USE_LASTLOG
#endif
-/* which type of time to use? (api.c) */
-#ifdef HAVE_SYS_TIME_H
-# define USE_TIMEVAL
+#ifdef HAVE_OSF_SIA
+# ifdef USE_SHADOW
+# undef USE_SHADOW
+# endif
+# define CUSTOM_SYS_AUTH_PASSWD 1
+#endif
+
+#if defined(HAVE_LIBIAF) && defined(HAVE_SET_ID) && !defined(HAVE_SECUREWARE)
+# define CUSTOM_SYS_AUTH_PASSWD 1
+#endif
+#if defined(HAVE_LIBIAF) && defined(HAVE_SET_ID) && !defined(BROKEN_LIBIAF)
+# define USE_LIBIAF
+#endif
+
+/* HP-UX 11.11 */
+#ifdef BTMP_FILE
+# define _PATH_BTMP BTMP_FILE
+#endif
+
+#if defined(USE_BTMP) && defined(_PATH_BTMP)
+# define CUSTOM_FAILED_LOGIN
#endif
/** end of login recorder definitions */
+#ifdef BROKEN_GETGROUPS
+# define getgroups(a,b) ((a)==0 && (b)==NULL ? NGROUPS_MAX : getgroups((a),(b)))
+#endif
+
+#if defined(HAVE_MMAP) && defined(BROKEN_MMAP)
+# undef HAVE_MMAP
+#endif
+
+#ifndef IOV_MAX
+# if defined(_XOPEN_IOV_MAX)
+# define IOV_MAX _XOPEN_IOV_MAX
+# elif defined(DEF_IOV_MAX)
+# define IOV_MAX DEF_IOV_MAX
+# else
+# define IOV_MAX 16
+# endif
+#endif
+
+#ifndef EWOULDBLOCK
+# define EWOULDBLOCK EAGAIN
+#endif
+
+#ifndef INET6_ADDRSTRLEN /* for non IPv6 machines */
+#define INET6_ADDRSTRLEN 46
+#endif
+
+#ifndef SSH_IOBUFSZ
+# define SSH_IOBUFSZ 8192
+#endif
+
#endif /* _DEFINES_H */