nc is *hobbit*'s netcat; let the sysadm have the same tools the crackers

have, so that he may learn what the network is about and protect it better.

1 files changed, 377 insertions, 0 deletions

diff --git a/src/usr.bin/nc/generic.h b/src/usr.bin/nc/generic.h
new file mode 100644
index 0000000000..b3dd5f5dc6
--- /dev/null
+++ b/src/usr.bin/nc/generic.h
@@ -0,0 +1,377 @@
+/* generic.h -- anything you don't #undef at the end remains in effect.
+   The ONLY things that go in here are generic indicator flags; it's up
+   to your programs to declare and call things based on those flags.
+
+   You should only need to make changes via a minimal system-specific section
+   at the end of this file.  To build a new section, rip through this and
+   check everything it mentions on your platform, and #undef that which needs
+   it.  If you generate a system-specific section you didn't find in here,
+   please mail me a copy so I can update the "master".
+
+   I realize I'm probably inventing another pseudo-standard here, but
+   goddamnit, everybody ELSE has already, and I can't include all of their
+   hairball schemes too.  HAVE_xx conforms to the gnu/autoconf usage and
+   seems to be the most common format.  In fact, I dug a lot of these out
+   of autoconf and tried to common them all together using "stupidh" to
+   collect data from platforms.
+
+   In disgust...  _H*  940910, 941115, 950511.  Pseudo-version: 1.3
+
+   Updated 951104 with many patches from netcat feedback, and properly
+   closed a lot of slop in open-ended comments: version 1.4
+   960217 + nextstep: version 1.5
+*/
+
+#ifndef GENERIC_H               /* only run through this once */
+#define GENERIC_H
+
+/* =============================== */
+/* System calls, lib routines, etc */
+/* =============================== */
+
+/* How does your system declare malloc, void or char?  Usually void, but go
+   ask the SunOS people why they had to be different... */
+#define VOID_MALLOC
+
+/* notably from fwtk/firewall.h: posix locking? */
+#define HAVE_FLOCK              /* otherwise it's lockf() */
+
+/* if you don't have setsid(), you might have setpgrp(). */
+#define HAVE_SETSID
+
+/* random() is generally considered better than rand() */
+#define HAVE_RANDOM
+
+/* the srand48/lrand48/etc family is s'posedly even better */
+#define HAVE_RAND48
+/* bmc@telebase and others have suggested these macros if a box *does* have
+   rand48.  Will consider for later if we're doing something that really
+   requires stronger random numbers, but netcat and such certainly doesn't.
+#define srandom(seed) srand48((long) seed)
+#define random()      lrand48() */
+
+/* if your machine doesn't have lstat(), it should have stat() [dos...] */
+#define HAVE_LSTAT
+
+/* different kinds of term ioctls.  How to recognize them, very roughly:
+   sysv/POSIX_ME_HARDER:  termio[s].h, struct termio[s], tty.c_*[]
+   bsd/old stuff:  sgtty.h, ioctl(TIOCSETP), sgttyb.sg_*, tchars.t_*  */
+#define HAVE_TERMIOS
+
+/* dbm vs ndbm */
+#define HAVE_NDBM
+
+/* extended utmp/wtmp stuff.  MOST machines still do NOT have this SV-ism */
+#define UTMPX
+
+/* some systems have nice() which takes *relative* values... [resource.h] */
+#define HAVE_SETPRIORITY
+
+/* a sysvism, I think, but ... */
+#define HAVE_SYSINFO
+
+/* ============= */
+/* Include files */
+/* ============= */
+
+/* Presence of these can be determined via a script that sniffs them
+   out if you aren't sure.  See "stupidh"... */
+
+/* stdlib comes with most modern compilers, but ya never know */
+#define HAVE_STDLIB_H
+
+/* not on a DOS box! */
+#define HAVE_UNISTD_H
+
+/* stdarg is a weird one */
+#define HAVE_STDARG_H
+
+/* dir.h or maybe ndir.h otherwise. */
+#define HAVE_DIRENT_H
+
+/* string or strings */
+#define HAVE_STRINGS_H
+
+/* if you don't have lastlog.h, what you want might be in login.h */
+#define HAVE_LASTLOG_H
+
+/* predefines for _PATH_various */
+#define HAVE_PATHS_H
+
+/* some SV-flavors break select stuff out separately */
+#define HAVE_SELECT_H
+
+/* assorted others */
+#define HAVE_PARAM_H            /* in sys/ */
+#define HAVE_SYSMACROS_H        /* in sys/ */
+#define HAVE_TTYENT_H           /* securetty et al */
+
+/* ==================== */
+
+/* Still maybe have to do something about the following, if it's even
+   worth it.  I just grepped a lot of these out of various code, without
+   looking them up yet:
+
+#define HAVE_EINPROGRESS
+#define HAVE_F_SETOWN
+HAVE_FILIO_H ... fionbio, fiosetown, etc... will need for hairier
+  select loops.
+#define HAVE_SETENV ... now *there's* a hairy one; **environ is portable
+#define BIG_ENDIAN/little_endian ... *please* try to avoid this stupidity
+   and LSBFIRST/MSBFIRST
+#define HAVE_GETUSERSHELL ... you could always pull it out of getpwent()
+#define HAVE_SETE[UG]ID ... lib or syscall, it varies on diff platforms
+#define HAVE_STRCHR ... should actually be handled by string/strings
+#define HAVE_PSTAT
+#define HAVE_ST_BLKSIZE ... a stat() thing?
+#define HAVE_IP_TOS
+#define HAVE_STRFTIME ... screw this, we'll just INCLUDE one for lame
+   old boxes that don't have it [sunos 3.x, early 4.x?]
+#define HAVE_VFPRINTF
+#define HAVE_SHADOW_PASSWD  ... in its multitudinous schemes?? ... how
+   about sumpin' like #define SHADOW_PASSWD_TYPE ... could get grody.
+   ... looks like sysv /etc/shadow, getspent() family is common.
+#define SIG*  ... what a swamp, punt for now; should all be in signal.h
+#define HAVE_STRCSPN  ... see larry wall's comment in the fwtk regex code
+#define ULTRIX_AUTH  ... bwahaha.
+#define HAVE_YP  or NIS or whatever you wanna call it this week
+randomness about VARARGS??
+--- later stuff to be considered ---
+#define UINT4 ... u-int on alpha/osf, i.e. __alpha/__osf__, ulong elsewhere?
+   dont name it that, though, it'll conflict with extant .h files like md5
+randomness about machine/endian.h, machine/inline.h -- bsdi, net/2
+randomness about _PATH_WTMP vs WTMP_FILE and where they even live!!
+#define HAVE_SYS_ERRLIST ... whether it's in stdio.h or not [bsd 4.4]
+--- still more stuff
+#define HAVE_SETENV
+#define _PATH_UTMP vs UTMP_FILE, a la deslogind?!
+#define HAVE_DAEMON
+#define HAVE_INETADDR  [vixie bind?]
+lseek: SEEK_SET vs L_SET and associated lossage [epi-notes, old 386Mach]
+bsdi: ioctl_compat.h ?
+--- takin' some ifdefs from CNS krb:
+F_GETOWN/F_SETOWN
+CRAY: long = 8 bytes, etc  [class with alpha?]
+CGETENT
+SIGINFO
+SIGTSTP SIGTTOU SIGWINCH
+SPX?
+SYSV_TERMIO -- covered elsewhere, I hope
+TIOCEXT TIOCFLUSH TIOC[GS]WINSIZ 
+NEWINIT: something about init cleaning up dead login processes [telnet?]
+PARENT_DOES_UTMP, too  [telnet]
+VDISCARD
+VEOL/VEOL2/VLNEXT VREPRINT -- termios stuff?, and related...
+STREAMSPTY/STREAMSPTYEM
+AF_INET/AF_UNSPEC, PF_*
+ECHOCTL/ECHOKE
+F_ULOCK [?!]
+setpgrp/getpgrp() ONEARG business..
+HAVE_ALLOCA
+HAVE_GETUTENT
+HAVE_SYS_SELECT_H  [irix!]
+HAVE_DIRENT  [old 386mach has *direct.h*!]
+HAVE_SIGSET
+HAVE_VFORK_H and HAVE_VFORK
+HAVE_VHANGUP
+HAVE_VSPRINTF
+HAVE_IPTOS_*
+HAVE_STRCASECMP, STRNCASECMP
+HAVE_SYS_FCNTL_H
+HAVE_SYS_TIME_H
+HAVE_UTIMES
+NOTTYENT [?]
+HAVE_FCHMOD
+HAVE_GETUSERSHELL
+HAVE_SIGCONTEXT  [stack hair, very machine-specific]
+YYLINENO?
+POSIX_SIGNALS
+POSIX_TERMIOS
+SETPROCTITLE -- breaks some places, like fbsd sendmail
+SIG* -- actual signal names?  some are missing
+SIOCGIFCONF
+SO_BROADCAST
+SHMEM  [krb tickets]
+VARARGS, or HAVE_VARARGS
+CBAUD
+... and B300, B9600, etc etc
+HAVE_BZERO  vs  memset/memcpy
+HAVE_SETVBUF
+HAVE_STRDUP
+HAVE_GETENV
+HAVE_STRSAVE
+HAVE_STBLKSIZE  [stat?]
+HAVE_STREAM_H -- in sys/, ref sendmail 8.7 for IP_SRCROUTE
+FCHMOD
+INITGROUPS -- most machines seem to *have*
+SETREUID
+SNPRINTF
+SETPGRP semantics bsd vs. sys5 style
+
+There's also the issue about WHERE various .h files live, sys/ or otherwise.
+There's a BIG swamp lurking where network code of any sort lives.
+*/
+
+/* ======================== */
+/* System-specific sections */
+/* ======================== */
+
+/* By turning OFF various bits of the above,  you can customize for
+   a given platform.  Yes, we're ignoring the stock compiler predefines
+   and using our own plugged in via the Makefile. */
+
+/* DOS boxes, with MSC; you may need to adapt to a different compiler. */
+/* looks like later ones *do* have dirent.h, for example */
+#ifdef MSDOS
+#undef HAVE_FLOCK
+#undef HAVE_RANDOM
+#undef HAVE_LSTAT
+#undef HAVE_TERMIOS
+#undef UTMPX
+#undef HAVE_SYSINFO
+#undef HAVE_UNISTD_H
+#undef HAVE_DIRENT_H    /* unless you have the k00l little wrapper from L5!! */
+#undef HAVE_STRINGS_H
+#undef HAVE_LASTLOG_H
+#undef HAVE_PATHS_H
+#undef HAVE_PARAM_H
+#undef HAVE_SYSMACROS_H
+#undef HAVE_SELECT_H
+#undef HAVE_TTYENT_H
+#endif /* MSDOS */
+
+/* buglix 4.x; dunno about 3.x on down.  should be bsd4.2 */
+#ifdef ULTRIX
+#undef UTMPX
+#undef HAVE_PATHS_H
+#undef HAVE_SYSMACROS_H
+#undef HAVE_SELECT_H
+#endif /* buglix */
+
+/* some of this might still be broken on older sunoses */
+#ifdef SUNOS
+#undef VOID_MALLOC
+#undef UTMPX
+#undef HAVE_PATHS_H
+#undef HAVE_SELECT_H
+#endif /* sunos */
+
+/* "contact your vendor for a fix" */
+#ifdef SOLARIS
+/* has UTMPX */
+#undef HAVE_RANDOM
+#undef HAVE_SETPRIORITY
+#undef HAVE_STRINGS_H   /* this is genuinely the case, go figure */
+#undef HAVE_PATHS_H
+#undef HAVE_SELECT_H
+#undef HAVE_TTYENT_H
+#endif /* SOLARIS */
+
+/* whatever aix variant MIT had at the time; 3.2.x?? */
+#ifdef AIX
+#undef UTMPX
+#undef HAVE_LASTLOG_H
+#define HAVE_LOGIN_H    /* "special", in the educational sense */
+#endif /* aix */
+
+/* linux, which is trying as desperately as the gnu folks can to be
+   POSIXLY_CORRECT.  I think I'm gonna hurl... */
+#ifdef LINUX
+#undef UTMPX
+#undef HAVE_SYSINFO
+#undef HAVE_SELECT_H
+#undef HAVE_TTYENT_H
+#endif /* linux */
+
+/* irix 5.x; may not be correct for earlier ones */
+#ifdef IRIX
+/* wow, does irix really have everything?! */
+#endif /* irix */
+
+/* osf on alphas */
+#ifdef OSF
+#undef UTMPX
+#undef HAVE_SELECT_H
+#endif /* osf */
+
+/* they's some FUCKED UP paths in this one! */
+#ifdef FREEBSD
+#undef UTMPX
+#undef HAVE_SYSINFO
+#undef HAVE_LASTLOG_H
+#undef HAVE_SYSMACROS_H
+#undef HAVE_SELECT_H    /* actually a lie, but only for kernel */
+#endif /* freebsd */
+
+/* Originally from the sidewinder site, of all places, but subsequently
+   checked further under a more normal bsdi 2.0 */
+#ifdef BSDI
+#undef UTMPX
+#undef HAVE_LASTLOG_H
+#undef HAVE_SYSMACROS_H
+/* and their malloc.h was in sys/ ?! */
+#undef HAVE_SELECT_H
+#endif /* bsdi */
+
+/* netbsd/44lite, jives with amiga-netbsd from cactus */
+#ifdef NETBSD
+#undef UTMPX
+#undef HAVE_SYSINFO
+#undef HAVE_LASTLOG_H
+#undef HAVE_SELECT_H
+#endif /* netbsd */
+
+/* Hpux 9.0x, from BBN and various patches sent in */
+#ifdef HPUX
+#undef HAVE_RANDOM      /* but *does* have ?rand48 -- need to consider.. */
+#undef HAVE_UTMPX
+#undef HAVE_LASTLOG_H   /* has utmp/wtmp/btmp nonsense, and pututline() */
+#undef HAVE_PATHS_H
+#undef HAVE_SELECT_H
+#undef HAVE_TTYENT_H
+#endif /* hockeypux */
+
+/* Unixware [a loose definition of "unix", to be sure], 1.1.2 [at least]
+   from Brian Clapper.  He wasn't sure about 2.0... */
+#ifdef UNIXWARE
+/* has UTMPX */
+#undef HAVE_SETPRIORITY
+/* NOTE: UnixWare does provide the BSD stuff, in "/usr/ucbinclude" (headers)
+   and "/usr/ucblib" (libraries).  However, I've run into problems linking
+   stuff out of that version of the C library, when objects are also coming
+   out of the "regular" C library.  My advice: Avoid the BSD compatibility
+   stuff wherever possible.  Brian Clapper <bmc@telebase.com> */
+#undef HAVE_STRINGS_H
+#undef HAVE_PATHS_H
+#undef HAVE_TTYENT_H
+#endif /* UNIXWARE */
+
+/* A/UX 3.1.x from darieb@sandia.gov */
+#ifdef AUX
+#undef HAVE_RANDOM
+#undef HAVE_SELECT_H    /* xxx: untested */
+#endif /* a/ux */
+
+/* NeXTSTEP 3.2 motorola mudge@l0pht.com xxx should also work with
+   white hardware and Sparc/HPPA. Should work with 3.3 too as it's
+   4.3 / 4.4 bsd wrapped around mach */
+#ifdef NEXT
+#undef UTMPX
+#undef HAVE_SELECT_X
+#endif /* NeXTSTEP 3.2 motorola */
+
+/* Make some "generic" assumptions if all else fails */
+#ifdef GENERIC
+#undef HAVE_FLOCK
+#if defined(SYSV) && (SYSV < 4)  /* TW leftover: old SV doesnt have symlinks */
+#undef HAVE_LSTAT
+#endif /* old SYSV */
+#undef HAVE_TERMIOS
+#undef UTMPX
+#undef HAVE_PATHS_H
+#undef HAVE_SELECT_H
+#endif /* generic */
+
+/* ================ */
+#endif /* GENERIC_H */
+