As I see from /usr/share/doc that Gentoo has done massive patching of this software, I am bugreporting here and not to the author. When I run nc -l -u -p 1777 192.168.2.67, it stops with error message "invalid connection to [192.168.2.59] from (UNKNOWN) [192.168.2.55] 1777" There are two machines sending UDP to me - to 192.168.2.55 and 192.168.2.67. I specified 192.168.2.67 to netcat to display only the packets from .67 and not those from .55. But nc obviously doesn't work if there are two senders. What's the point of specifying an IP, when it doesn't work in a situation where distinguishing IP's is necessary anyway? Reproducible: Always Steps to Reproduce: 1. 2. 3. Portage 2.0.51.22-r3 (default-linux/x86/2005.0, gcc-3.3.6, glibc-2.3.5-r2, 2.6.1 2-gentoo-r10 i686) ================================================================= System uname: 2.6.12-gentoo-r10 i686 Intel(R) Pentium(R) M processor 1.50GHz Gentoo Base System version 1.6.13 dev-lang/python: 2.3.5-r2, 2.4.2 sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.20 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -mcpu=i686 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share /config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/ mozilla/defaults/pref /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/sh are/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/te x/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/ distributions/gentoo" LC_ALL="en_US.UTF-8" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X aac aalib alsa apm arts audiofile avi berkdb bitmap-fonts bzip2 cdr c rypt cups curl dga divx4linux dri dv dvd dvdread eds emboss encode esd ethereal exif expat fam ffmpeg fftw flac flash foomatic foomaticdb fortran ftp gd gdbm gi f glut gnome gpm gstreamer gtk gtk2 guile icq idn imagemagick imap imlib ipv6 ja bber jack java javascript jpeg kde lcms ldap libcaca libg++ libwww live matroska mhash mikmod ming mmap mmx mng motif mozilla mp3 mpeg mysql nas ncurses nls ogg oggvorbis opengl oss pam pcre pdflib perl php png python qt quicktime readline real recode ruby samba sdl sharedmem shorten slang socks5 speex spell sse ssl sv g svga tcltk tcpd tetex theora threads tiff tls truetype truetype-fonts type1-fo nts udev unicode vorbis wifi win32codecs wmf xine xinerama xml xml2 xmms xpm xv xvid zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
wouldnt matter if you e-mailed upstream because there is no 'upstream' anymore ;)
(In reply to comment #1) > wouldnt matter if you e-mailed upstream because there is no 'upstream' anymore ;) Welcome to the top 10 oldest untouched open bugs! Is there still a downstream?
(In reply to comment #2) unless you have something useful to contribute, don't bother commenting
this bug is in the original netcat: int dolisten (rad, rp, lad, lp) ... if (rad) /* xxx: fix to go down the *list* if we have one? */ if (memcmp (rad, whozis->iaddrs, sizeof (SA))) x = 1;
actually i think this bug is invalid. the hostname you specify to the listen mode is the only one netcat accepts. it only checks one hostname -- if you specify any more, they're silently ignored. so your command: $ nc -l -u -p 1777 192.168.2.67 means listen on port 1777 in UDP mode, and only allow 192.168.2.67 to access. when you connect from 192.168.2.55, it rejects it. netcat doesn't support restricting to more than one address like: $ nc -l -u -p 1777 192.168.2.67 192.168.2.55
