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slackware-current/source/n/nc/nc-110-21.diff
Patrick J Volkerding 5a12e7c134 Slackware 13.0 
Wed Aug 26 10:00:38 CDT 2009
Slackware 13.0 x86_64 is released as stable!  Thanks to everyone who
helped make this release possible -- see the RELEASE_NOTES for the
credits.  The ISOs are off to the replicator.  This time it will be a
6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD.
We're taking pre-orders now at store.slackware.com.  Please consider
picking up a copy to help support the project.  Once again, thanks to
the entire Slackware community for all the help testing and fixing
things and offering suggestions during this development cycle.
As always, have fun and enjoy!  -P.
2018-05-31 22:41:17 +02:00

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--- netcat-1.10.orig/Makefile
+++ netcat-1.10/Makefile
@@ -14,8 +14,8 @@
XLIBS = # xtra libs if necessary?
# -Bstatic for sunos, -static for gcc, etc. You want this, trust me.
STATIC =
-CC = cc $(CFLAGS)
-LD = $(CC) -s # linker; defaults to stripped executables
+CC = gcc $(CFLAGS)
+LD = $(CC) # linker; defaults to unstripped executables
o = o # object extension
ALL = nc
--- netcat-1.10.orig/debian/nc.1
+++ netcat-1.10/debian/nc.1
@@ -0,0 +1,146 @@
+.TH NC 1
+.SH NAME
+nc \- TCP/IP swiss army knife
+.SH SYNOPSIS
+.B nc
+.I "[-options] hostname port[s] [ports] ..."
+.br
+.B nc
+.I "-l -p port [-options] [hostname] [port]"
+.SH "DESCRIPTION"
+.B netcat
+is a simple unix utility which reads and writes data across network
+connections, using TCP or UDP protocol. It is designed to be a
+reliable "back-end" tool that can be used directly or easily driven by
+other programs and scripts. At the same time, it is a feature-rich
+network debugging and exploration tool, since it can create almost any
+kind of connection you would need and has several interesting built-in
+capabilities. Netcat, or "nc" as the actual program is named, should
+have been supplied long ago as another one of those cryptic but
+standard Unix tools.
+.P
+In the simplest usage, "nc host port" creates a TCP connection to the
+given port on the given target host. Your standard input is then sent
+to the host, and anything that comes back across the connection is
+sent to your standard output. This continues indefinitely, until the
+network side of the connection shuts down. Note that this behavior is
+different from most other applications which shut everything down and
+exit after an end-of-file on the standard input.
+.P
+Netcat can also function as a server, by listening for inbound
+connections on arbitrary ports and then doing the same reading and
+writing. With minor limitations, netcat doesn't really care if it
+runs in "client" or "server" mode -- it still shovels data back and
+forth until there isn't any more left. In either mode, shutdown can be
+forced after a configurable time of inactivity on the network side.
+.P
+And it can do this via UDP too, so netcat is possibly the "udp
+telnet-like" application you always wanted for testing your UDP-mode
+servers. UDP, as the "U" implies, gives less reliable data
+transmission than TCP connections and some systems may have trouble
+sending large amounts of data that way, but it's still a useful
+capability to have.
+.P
+You may be asking "why not just use telnet to connect to arbitrary
+ports?" Valid question, and here are some reasons. Telnet has the
+"standard input EOF" problem, so one must introduce calculated delays
+in driving scripts to allow network output to finish. This is the
+main reason netcat stays running until the *network* side closes.
+Telnet also will not transfer arbitrary binary data, because certain
+characters are interpreted as telnet options and are thus removed from
+the data stream. Telnet also emits some of its diagnostic messages to
+standard output, where netcat keeps such things religiously separated
+from its *output* and will never modify any of the real data in
+transit unless you *really* want it to. And of course telnet is
+incapable of listening for inbound connections, or using UDP instead.
+Netcat doesn't have any of these limitations, is much smaller and
+faster than telnet, and has many other advantages.
+.SH OPTIONS
+.TP 13
+.I \-g gateway
+source-routing hop point[s], up to 8
+.TP 13
+.I \-G num
+source-routing pointer: 4, 8, 12, ...
+.TP 13
+.I \-h
+display help
+.TP 13
+.I \-i secs
+delay interval for lines sent, ports scanned
+.TP 13
+.I \-l
+listen mode, for inbound connects
+.TP 13
+.I \-n
+numeric-only IP addresses, no DNS
+.TP 13
+.I \-o file
+hex dump of traffic
+.TP 13
+.I \-p port
+local port number (port numbers can be individual or ranges: lo-hi
+[inclusive])
+.TP 13
+.I \-q seconds
+after EOF is detected, wait the specified number of seconds and then
+quit.
+.TP 13
+.I \-b
+allow UDP broadcasts
+.TP 13
+.I \-r
+randomize local and remote ports
+.TP 13
+.I \-s addr
+local source address
+.TP 13
+.I \-t
+enable telnet negotiation
+.TP 13
+.I \-e prog
+specify program to exec after connect (use with caution)
+.TP 13
+.I \-u
+UDP mode
+.TP 13
+.I \-v
+verbose [use twice to be more verbose]
+.TP 13
+.I \-w secs
+timeout for connects and final net reads
+.TP 13
+.I \-z
+zero-I/O mode [used for scanning]
+.SH COPYRIGHT
+Netcat is entirely my own creation, although plenty of other code was
+used as examples. It is freely given away to the Internet community
+in the hope that it will be useful, with no restrictions except giving
+credit where it is due. No GPLs, Berkeley copyrights or any of that
+nonsense. The author assumes NO responsibility for how anyone uses
+it. If netcat makes you rich somehow and you're feeling generous,
+mail me a check. If you are affiliated in any way with Microsoft
+Network, get a life. Always ski in control. Comments, questions, and
+patches to hobbit@avian.org.
+.SH BUGS
+Efforts have been made to have netcat "do the right thing" in all its
+various modes. If you believe that it is doing the wrong thing under
+whatever circumstances, please notify me and tell me how you think it
+should behave. If netcat is not able to do some task you think up,
+minor tweaks to the code will probably fix that. It provides a basic
+and easily-modified template for writing other network applications,
+and I certainly encourage people to make custom mods and send in any
+improvements they make to it. Continued feedback from the Internet
+community is always welcome!
+.P
+Some port names in /etc/services contain hyphens -- netcat currently
+will not correctly parse those, so specify ranges using numbers if you
+can.
+.SH "SEE ALSO"
+/usr/share/doc/netcat/README.gz
+.SH AUTHOR
+This manual page was written by Joey Hess <joeyh@debian.org> and
+Robert Woodcock <rcw@debian.org>, cribbing heavily from Netcat's
+README file.
+.P
+Netcat was written by a guy we know as the Hobbit <hobbit@avian.org>.
--- netcat-1.10.orig/debian/control
+++ netcat-1.10/debian/control
@@ -0,0 +1,18 @@
+Source: netcat
+Section: net
+Priority: optional
+Maintainer: Decklin Foster <decklin@red-bean.com>
+Standards-Version: 3.5.6
+Build-Depends: debhelper (>= 3.0.0)
+
+Package: netcat
+Architecture: any
+Depends: ${shlibs:Depends}
+Description: TCP/IP swiss army knife
+ A simple Unix utility which reads and writes data across network
+ connections using TCP or UDP protocol. It is designed to be a reliable
+ "back-end" tool that can be used directly or easily driven by other
+ programs and scripts. At the same time it is a feature-rich network
+ debugging and exploration tool, since it can create almost any kind of
+ connection you would need and has several interesting built-in
+ capabilities.
--- netcat-1.10.orig/debian/netcat.examples
+++ netcat-1.10/debian/netcat.examples
@@ -0,0 +1,2 @@
+data/
+scripts/
--- netcat-1.10.orig/debian/rules
+++ netcat-1.10/debian/rules
@@ -0,0 +1,64 @@
+#!/usr/bin/make -f
+# Sample debian/rules that uses debhelper.
+# This file is public domain software, originally written by Joey Hess.
+
+# Uncomment this to turn on verbose mode.
+#export DH_VERBOSE=1
+
+# This is the debhelper compatibility version to use.
+export DH_COMPAT=3
+
+DEB_CFLAGS = -O2
+ifneq (,$(findstring debug,$(DEB_BUILD_OPTIONS)))
+DEB_CFLAGS += -g
+endif
+
+build: build-stamp
+build-stamp:
+ dh_testdir
+ $(MAKE) linux CFLAGS='$(DEB_CFLAGS)' STATIC='' \
+ DFLAGS='-DLINUX -DTELNET -DGAPING_SECURITY_HOLE'
+ touch build-stamp
+
+clean:
+ dh_testdir
+ dh_testroot
+ rm -f build-stamp
+ # Add here commands to clean up after the build process.
+ -$(MAKE) clean
+ dh_clean
+
+install:
+ dh_testdir
+ dh_testroot
+ dh_clean -k
+ dh_installdirs
+ install -m 0755 nc debian/netcat/usr/bin
+ ln -s nc debian/netcat/usr/bin/netcat
+
+# Build architecture-independent files here.
+binary-indep: build install
+# We have nothing to do by default.
+
+# Build architecture-dependent files here.
+binary-arch: build install
+ dh_testdir
+ dh_testroot
+ dh_installdocs
+ dh_installexamples
+# dh_installmenu
+ dh_installman
+ ln -s nc.1.gz debian/netcat/usr/share/man/man1/netcat.1.gz
+ dh_installchangelogs Changelog
+ dh_link
+ dh_strip
+ dh_compress -Xexamples
+ dh_fixperms
+ dh_installdeb
+ dh_shlibdeps
+ dh_gencontrol
+ dh_md5sums
+ dh_builddeb
+
+binary: binary-indep binary-arch
+.PHONY: build clean binary-indep binary-arch binary install
--- netcat-1.10.orig/debian/netcat.copyright
+++ netcat-1.10/debian/netcat.copyright
@@ -0,0 +1,12 @@
+The netcat Debian package was originally created by Michael Shields
+<shields@crosslink.net>. It is currently maintained by Decklin Foster
+<decklin@red-bean.com>.
+
+Netcat was written by *Hobbit* <hobbit@avian.org>, and can be
+downloaded from <URL:ftp://avian.org/src/hacks/>.
+
+The following permission statement is excerpted from `netcat.blurb':
+
+ Netcat and the associated package is a product of Avian Research,
+ and is freely available in full source form with no restrictions
+ save an obligation to give credit where due.
--- netcat-1.10.orig/debian/changelog
+++ netcat-1.10/debian/changelog
@@ -0,0 +1,157 @@
+netcat (1.10-21) unstable; urgency=low
+
+ * Documented -e in man page. (Closes: #131269)
+
+ -- Decklin Foster <decklin@red-bean.com> Tue, 29 Jan 2002 16:30:30 -0500
+
+netcat (1.10-20) unstable; urgency=low
+
+ * Moved around shutdown call in -q patch to be more compatible with standard
+ nc. Thanks to Dmitry Chernyak <cdl@inkasbank.ru> for pointing this out.
+ * Applied UDP broadcast patch from NetBSD (Closes: #108182)
+ - Updated man page to document this option
+ - Also applied patch to use inet_aton instead of IADDR_NONE (which is
+ obsolete), so that it will work.
+ * Bumped Standards-Version to 3.5.6
+
+ -- Decklin Foster <decklin@red-bean.com> Tue, 9 Oct 2001 18:08:24 -0400
+
+netcat (1.10-19) unstable; urgency=low
+
+ * Reupload source package (my typo fix was lost due to a misconfigured
+ dput). This should really fix #97583.
+
+ -- Decklin Foster <decklin@red-bean.com> Fri, 1 Jun 2001 18:18:17 -0400
+
+netcat (1.10-18) unstable; urgency=low
+
+ * Applied patch from Joe Pepin <jdp@ll.mit.edu> to fix multiple timeouts
+ (Closes: #97583)
+ * Lookup services with getservbyname even if resolving hostnames with DNS is
+ disabled (Closes: #98902)
+ * Install a symlink to the nc binary called 'netcat'. (Closes: #97625)
+
+ -- Decklin Foster <decklin@red-bean.com> Fri, 1 Jun 2001 13:13:25 -0400
+
+netcat (1.10-17) unstable; urgency=low
+
+ * Added include for <resolv.h>, which is needed to compile with recent
+ versions of glibc.
+ * Added patch to always print "connection refused" messages, without having
+ to turn on the other junk that -v prints. (Closes: #65413)
+ * Upgraded to debhelper 3 and policy 3.5.2.0.
+ * Added DEB_BUILD_OPTIONS =~ /debug/ support.
+
+ -- Decklin Foster <decklin@red-bean.com> Wed, 28 Feb 2001 16:53:33 -0500
+
+netcat (1.10-16) unstable; urgency=low
+
+ * Rebuild with dpkg 1.8.1.2 to fix bad .diff.gz
+
+ -- Decklin Foster <decklin@red-bean.com> Mon, 8 Jan 2001 14:54:48 -0500
+
+netcat (1.10-15) unstable; urgency=low
+
+ * Add shutdown() patch back in (Closes: #81384)
+ * updated /usr/doc -> /usr/share/doc in man page.
+
+ -- Decklin Foster <decklin@red-bean.com> Sat, 6 Jan 2001 08:58:21 -0500
+
+netcat (1.10-14) unstable; urgency=low
+
+ * Ship with -e turned on. (Closes: #66355)
+ * Fix debian/copyright typo.
+
+ -- Decklin Foster <decklin@red-bean.com> Sat, 30 Dec 2000 13:27:33 -0500
+
+netcat (1.10-13) unstable; urgency=low
+
+ * New maintainer. (Closes: #80305)
+ * Updated debhelper rules to v2. Also cleaned up/moved some targets and dh_*
+ options.
+ * Bumped Standards-Version to 3.2.1.0.
+ * Compress README file, as per policy.
+ * Applied -q patch properly (Closes: #62402). I think that this is also what
+ caused #71616, but I'll hold off on closing that one.
+ * Added README.Debian explanation about -e. This is possibly the problem
+ behind #66355, so maybe I can close that as well.
+
+ -- Decklin Foster <decklin@red-bean.com> Thu, 28 Dec 2000 19:02:56 -0500
+
+netcat (1.10-12.1) frozen unstable; urgency=low
+
+ * Non-maintained upload.
+ * Rename arm() to arm_timer() (Closes: #56390)
+
+ -- Edward Brocklesby <ejb@styx.uucp.openprojects.net> Tue, 22 Feb 2000 12:59:12 +0000
+
+netcat (1.10-12) unstable; urgency=low
+
+ * Fixed bugs #45669 and #45675 (removed extraneous sleep(1) command and also
+ removed the "punt!" message; added -q feature)
+
+ -- Robert S. Edmonds <stu@novare.net> Wed, 22 Sep 1999 19:29:47 -0400
+
+netcat (1.10-11) unstable; urgency=low
+
+ * Applied patch from Graham Stoney <greyham@research.canon.com.au> that
+ fixes deadlock if the server doesn't close its end until it reads EOF on
+ the connection
+
+ -- Robert S. Edmonds <stu@novare.net> Mon, 13 Sep 1999 21:53:59 -0400
+
+netcat (1.10-10) unstable; urgency=low
+
+ * Man page fixed (/usr/doc/netcat/README.gz). Fixes bug #35811
+
+ -- Robert S. Edmonds <edmonds@freewwweb.com> Sat, 12 Jun 1999 15:21:31 -0400
+
+netcat (1.10-9) unstable; urgency=low
+
+ * Compiled with -DTELNET.
+
+ -- Robert S. Edmonds <edmonds@freewwweb.com> Wed, 4 Nov 1998 09:27:40 -0500
+
+netcat (1.10-8) unstable frozen; urgency=low
+
+ * At the request of many users (and a few bug reports) the binary is now
+ going to be called "nc" as it always was.
+
+ -- Robert S. Edmonds <edmonds@freewwweb.com> Sun, 26 Apr 1998 19:36:00 -0400
+
+netcat (1.10-7) unstable; urgency=low
+
+ * Fixed lintian error possible-name-space-pollution. (binary nc -> netcat)
+
+ -- Robert S. Edmonds <edmonds@freewwweb.com> Mon, 30 Mar 1998 19:11:49 -0500
+
+netcat (1.10-6) unstable; urgency=low
+
+ * Upgraded to Standards-Version 2.4.0.0.
+
+ -- Robert S. Edmonds <edmonds@freewwweb.com> Tue, 17 Feb 1998 13:06:22 -0500
+
+netcat (1.10-5) unstable; urgency=low
+
+ * Merged in changes from Robert Woodcock <rcw@oz.net>.
+ - Man page updates.
+ - Compiled with -DTELNET
+ * Removed bogus menu file.
+ * Full source upload.
+
+ -- Joey Hess <joeyh@master.debian.org> Sat, 10 Jan 1998 13:53:59 -0500
+
+netcat (1.10-4) unstable; urgency=low
+
+ * Updated to "new" source format. (#9489)
+ * Libc6. (#11716)
+ * Orphaned the package.
+ * Fixed up description in control file to conform with policy, short
+ description doesn't include package name now.
+ * Fixed documentation location to comply with current policy. (#13194,
+ #11530, #9785)
+ * Wrote a man page. (#9785, #5304, #6647)
+ * Rewrote debian/rules to use debhelper.
+ * Install upstream changelog.
+
+ -- Joey Hess <joeyh@master.debian.org> Sat, 10 Jan 1998 00:53:45 -0500
--- netcat-1.10.orig/debian/netcat.manpages
+++ netcat-1.10/debian/netcat.manpages
@@ -0,0 +1 @@
+debian/nc.1
--- netcat-1.10.orig/debian/netcat.README.Debian
+++ netcat-1.10/debian/netcat.README.Debian
@@ -0,0 +1,17 @@
+netcat for Debian
+-----------------
+
+netcat has been compiled with -DGAPING_SECURITY_HOLE turned on. I do
+not believe this is as much of a security hole as the author makes it
+out to be, *if* you know what you're doing (but then, if you didn't,
+you'd still be using telnet ;-)). Since the spawned program will run
+as whatever user started netcat, don't use -e as root. You have been
+warned, so if some cracker breaks into your system due to your own
+stupidity, don't blame me.
+
+A symlink to the netcat binary called 'netcat' has been installed.
+However, the canonical name is still 'nc'. If you use netcat on other
+systems, it will probably only be installed as 'nc', so keep this in
+mind when writing scripts.
+
+ -- Decklin Foster <decklin@red-bean.com> Fri, 1 Jun 2001 13:38:10 -0400
--- netcat-1.10.orig/debian/netcat.dirs
+++ netcat-1.10/debian/netcat.dirs
@@ -0,0 +1 @@
+usr/bin
--- netcat-1.10.orig/debian/netcat.docs
+++ netcat-1.10/debian/netcat.docs
@@ -0,0 +1 @@
+README
--- netcat-1.10.orig/netcat.c
+++ netcat-1.10/netcat.c
@@ -59,6 +59,14 @@
#define RAND rand
#endif /* HAVE_RANDOM */
+/* #define POSIX_SETJMP /* If you want timeouts to work under the */
+ /* posixly correct, yet non-standard glibc-2.x*/
+ /* then define this- you may also need it for */
+ /* IRIX, and maybe some others */
+#ifdef LINUX
+#define POSIX_SETJMP
+#endif
+
/* includes: */
#include <sys/time.h> /* timeval, time_t */
#include <setjmp.h> /* jmp_buf et al */
@@ -73,6 +81,9 @@
#include <errno.h>
#include <signal.h>
#include <fcntl.h> /* O_WRONLY et al */
+#ifdef LINUX /* Linux needs the HERE, oh well. */
+#include <resolv.h>
+#endif
/* handy stuff: */
#define SA struct sockaddr /* socket overgeneralization braindeath */
@@ -106,7 +117,11 @@
#define PINF struct port_poop
/* globals: */
+#ifdef POSIX_SETJMP
+sigjmp_buf jbuf; /* timer crud */
+#else
jmp_buf jbuf; /* timer crud */
+#endif
int jval = 0; /* timer crud */
int netfd = -1;
int ofd = 0; /* hexdump output fd */
@@ -151,6 +166,7 @@
/* global cmd flags: */
USHORT o_alla = 0;
+USHORT o_allowbroad = 0;
unsigned int o_interval = 0;
USHORT o_listen = 0;
USHORT o_nflag = 0;
@@ -160,6 +176,7 @@
USHORT o_verbose = 0;
unsigned int o_wait = 0;
USHORT o_zero = 0;
+int o_quit = -1; /* 0 == quit-now; >0 == quit after o_quit seconds */
/* o_tn in optional section */
/* Debug macro: squirt whatever message and sleep a bit so we can see it go
@@ -211,7 +228,6 @@
o_verbose = 1;
holler (str, p1, p2, p3, p4, p5, p6);
close (netfd);
- sleep (1);
exit (1);
} /* bail */
@@ -222,7 +238,15 @@
errno = 0;
if (o_verbose > 1) /* normally we don't care */
bail (wrote_txt, wrote_net, wrote_out);
- bail (" punt!");
+ bail ("");
+}
+
+/* quit :
+ handler for a "-q" timeout (exit 0 instead of 1) */
+void quit()
+{
+ close(netfd);
+ exit(0);
}
/* timeout and other signal handling cruft */
@@ -232,12 +256,16 @@
alarm (0);
if (jval == 0)
bail ("spurious timer interrupt!");
+#ifdef POSIX_SETJMP
+ siglongjmp (jbuf, jval);
+#else
longjmp (jbuf, jval);
+#endif
}
-/* arm :
+/* arm_timer :
set the timer. Zero secs arg means unarm */
-void arm (num, secs)
+void arm_timer (num, secs)
unsigned int num;
unsigned int secs;
{
@@ -250,7 +278,7 @@
alarm (secs);
jval = num;
} /* if secs */
-} /* arm */
+} /* arm_timer */
/* Hmalloc :
malloc up what I want, rounded up to *4, and pre-zeroed. Either succeeds
@@ -333,6 +361,7 @@
struct in_addr iaddr;
register HINF * poop = NULL;
register int x;
+ int rc;
/* I really want to strangle the twit who dreamed up all these sockaddr and
hostent abstractions, and then forced them all to be incompatible with
@@ -361,9 +390,9 @@
bail ("gethostpoop fuxored");
strcpy (poop->name, unknown); /* preload it */
/* see wzv:workarounds.c for dg/ux return-a-struct inet_addr lossage */
- iaddr.s_addr = inet_addr (name);
+ rc = inet_aton(name, &iaddr);
- if (iaddr.s_addr == INADDR_NONE) { /* here's the great split: names... */
+ if (rc == 0) { /* here's the great split: names... */
if (numeric)
bail ("Can't parse %s as an IP address", name);
hostent = gethostbyname (name);
@@ -444,8 +473,10 @@
if (pstring) /* one or the other, pleeze */
return (0);
x = pnum;
- if (o_nflag) /* go faster, skip getservbyblah */
- goto gp_finish;
+ /* disabled, see bug #98902. if this is *really* slowing someone
+ * down I'll reconsider. */
+ /* if (o_nflag) */ /* go faster, skip getservbyblah */
+ /* goto gp_finish; */
y = htons (x); /* gotta do this -- see Fig.1 below */
servent = getservbyport (y, whichp);
if (servent) {
@@ -620,6 +651,13 @@
rr = setsockopt (nnetfd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof (x));
if (rr == -1)
holler ("nnetfd reuseaddr failed"); /* ??? */
+#ifdef SO_BROADCAST
+ if (o_allowbroad) {
+ rr = setsockopt (nnetfd, SOL_SOCKET, SO_BROADCAST, &x, sizeof (x));
+ if (rr == -1)
+ holler ("nnetfd reuseaddr failed"); /* ??? */
+ }
+#endif
#ifdef SO_REUSEPORT /* doesnt exist everywhere... */
rr = setsockopt (nnetfd, SOL_SOCKET, SO_REUSEPORT, &x, sizeof (x));
if (rr == -1)
@@ -743,14 +781,23 @@
} /* if gatesidx */
/* wrap connect inside a timer, and hit it */
- arm (1, o_wait);
+ arm_timer (1, o_wait);
+#ifdef POSIX_SETJMP
+ if (sigsetjmp (jbuf,1) == 0) {
+ rr = connect (nnetfd, (SA *)remend, sizeof (SA));
+ } else { /* setjmp: connect failed... */
+ rr = -1;
+ errno = ETIMEDOUT; /* fake it */
+ }
+#else
if (setjmp (jbuf) == 0) {
rr = connect (nnetfd, (SA *)remend, sizeof (SA));
} else { /* setjmp: connect failed... */
rr = -1;
errno = ETIMEDOUT; /* fake it */
}
- arm (0, 0);
+#endif
+ arm_timer (0, 0);
if (rr == 0)
return (nnetfd);
close (nnetfd); /* clean up junked socket FD!! */
@@ -820,14 +867,15 @@
actually does work after all. Yow. YMMV on strange platforms! */
if (o_udpmode) {
x = sizeof (SA); /* retval for recvfrom */
- arm (2, o_wait); /* might as well timeout this, too */
- if (setjmp (jbuf) == 0) { /* do timeout for initial connect */
+ arm_timer (2, o_wait); /* might as well timeout this, too */
+#ifdef POSIX_SETJMP
+ if (sigsetjmp (jbuf,1) == 0) { /* do timeout for initial connect */
rr = recvfrom /* and here we block... */
(nnetfd, bigbuf_net, BIGSIZ, MSG_PEEK, (SA *) remend, &x);
Debug (("dolisten/recvfrom ding, rr = %d, netbuf %s ", rr, bigbuf_net))
} else
goto dol_tmo; /* timeout */
- arm (0, 0);
+ arm_timer (0, 0);
/* I'm not completely clear on how this works -- BSD seems to make UDP
just magically work in a connect()ed context, but we'll undoubtedly run
into systems this deal doesn't work on. For now, we apparently have to
@@ -842,15 +890,45 @@
rr = connect (nnetfd, (SA *)remend, sizeof (SA));
goto whoisit;
} /* o_udpmode */
+#else
+ if (setjmp (jbuf) == 0) { /* do timeout for initial connect */
+ rr = recvfrom /* and here we block... */
+ (nnetfd, bigbuf_net, BIGSIZ, MSG_PEEK, (SA *) remend, &x);
+Debug (("dolisten/recvfrom ding, rr = %d, netbuf %s ", rr, bigbuf_net))
+ } else
+ goto dol_tmo; /* timeout */
+ arm (0, 0);
+/* I'm not completely clear on how this works -- BSD seems to make UDP
+ just magically work in a connect()ed context, but we'll undoubtedly run
+ into systems this deal doesn't work on. For now, we apparently have to
+ issue a connect() on our just-tickled socket so we can write() back.
+ Again, why the fuck doesn't it just get filled in and taken care of?!
+ This hack is anything but optimal. Basically, if you want your listener
+ to also be able to send data back, you need this connect() line, which
+ also has the side effect that now anything from a different source or even a
+ different port on the other end won't show up and will cause ICMP errors.
+ I guess that's what they meant by "connect".
+ Let's try to remember what the "U" is *really* for, eh? */
+ rr = connect (nnetfd, (SA *)remend, sizeof (SA));
+ goto whoisit;
+ } /* o_udpmode */
+#endif
/* fall here for TCP */
x = sizeof (SA); /* retval for accept */
- arm (2, o_wait); /* wrap this in a timer, too; 0 = forever */
+ arm_timer (2, o_wait); /* wrap this in a timer, too; 0 = forever */
+#ifdef POSIX_SETJMP
+ if (sigsetjmp (jbuf,1) == 0) {
+ rr = accept (nnetfd, (SA *)remend, &x);
+ } else
+ goto dol_tmo; /* timeout */
+#else
if (setjmp (jbuf) == 0) {
rr = accept (nnetfd, (SA *)remend, &x);
} else
goto dol_tmo; /* timeout */
- arm (0, 0);
+#endif
+ arm_timer (0, 0);
close (nnetfd); /* dump the old socket */
nnetfd = rr; /* here's our new one */
@@ -1216,6 +1294,18 @@
if (rr <= 0) { /* at end, or fukt, or ... */
FD_CLR (0, ding1); /* disable and close stdin */
close (0);
+ /* if the user asked to exit on EOF, do it */
+ if (o_quit == 0) {
+ shutdown(netfd, 1);
+ close (fd);
+ exit (0);
+ }
+ /* if user asked to die after a while, arrange for it */
+ if (o_quit > 0) {
+ shutdown(netfd, 1);
+ signal (SIGALRM, quit);
+ alarm(o_quit);
+ }
} else {
rzleft = rr;
zp = bigbuf_in;
@@ -1389,12 +1479,14 @@
/* If your shitbox doesn't have getopt, step into the nineties already. */
/* optarg, optind = next-argv-component [i.e. flag arg]; optopt = last-char */
- while ((x = getopt (argc, argv, "ae:g:G:hi:lno:p:rs:tuvw:z")) != EOF) {
+ while ((x = getopt (argc, argv, "abe:g:G:hi:lno:p:q:rs:tuvw:z")) != EOF) {
/* Debug (("in go: x now %c, optarg %x optind %d", x, optarg, optind)) */
switch (x) {
case 'a':
bail ("all-A-records NIY");
o_alla++; break;
+ case 'b':
+ o_allowbroad++; break;
#ifdef GAPING_SECURITY_HOLE
case 'e': /* prog to exec */
pr00gie = optarg;
@@ -1443,6 +1535,8 @@
break;
case 'r': /* randomize various things */
o_random++; break;
+ case 'q': /* quit after stdin does EOF */
+ o_quit = atoi(optarg); break;
case 's': /* local source address */
/* do a full lookup [since everything else goes through the same mill],
unless -n was previously specified. In fact, careful placement of -n can
@@ -1602,8 +1696,16 @@
/* if we're scanning at a "one -v" verbosity level, don't print refusals.
Give it another -v if you want to see everything. */
if ((Single || (o_verbose > 1)) || (errno != ECONNREFUSED))
+ {
+ /* bug 65413 - if we're not scanning, we always want an
+ * error to be printed for refused connects. This is a
+ * disgustingly ugly way to do it, I really should just
+ * rewrite the holler() interface... */
+ if (Single) o_verbose++;
holler ("%s [%s] %d (%s)",
whereto->name, whereto->addrs[0], curport, portpoop->name);
+ if (Single) o_verbose--;
+ }
} /* if netfd */
close (netfd); /* just in case we didn't already */
if (o_interval)
@@ -1642,6 +1744,7 @@
-e prog program to exec after connect [dangerous!!]");
#endif
holler ("\
+ -b allow broadcasts\n\
-g gateway source-routing hop point[s], up to 8\n\
-G num source-routing pointer: 4, 8, 12, ...\n\
-h this cruft\n\
@@ -1651,6 +1754,7 @@
-o file hex dump of traffic\n\
-p port local port number\n\
-r randomize local and remote ports\n\
+ -q secs quit after EOF on stdin and delay of secs\n\
-s addr local source address");
#ifdef TELNET
holler ("\
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