help about free bsp version netcat to work it on ubuntu
yanglei.fage at gmail.com
Mon Jul 23 04:59:56 UTC 2012
On Mon, Jul 23, 2012 at 12:25 AM, Polytropon <freebsd at edvax.de> wrote:
> On Sun, 22 Jul 2012 22:41:57 +0800, lei yang wrote:
>> I want to build a "netcat" on my local pc (ubuntu) with gcc, is it
>> possible? I'm new to free bsd
> I hope I don't misunderstand your intention: You are trying to
> build a Linux executable of netcat from FreeBSD's sources?
> You _do_ know that FreeBSD and Linux (here: Ubuntu) are two
> totally different operating systems. I'm not sure code is
> compatible at this level (but it maybe _could_ be, you'd
> have to try it).
> The netcat program (nc) is part of the FreeBSD operating
> system for some time now. There's also a port of netcat
> in /usr/ports/net/netcat (which can also be used). That
> port's Makefile lists some sources:
> You could try to use that source distribution as well.
Thanks for the great help, I have built it successfully on my ubuntu.
I find it's not the version I want
I want use the version on Rehat,which has a "-U" flag( yes, I want to
use this flag) but the above version has no this flag
usage: nc [-46DdhklnrStUuvzC] [-i interval] [-p source_port]
[-s source_ip_address] [-T ToS] [-w timeout] [-X proxy_version]
[-x proxy_address[:port]] [hostname] [port[s]]
-4 Use IPv4
-6 Use IPv6
-D Enable the debug socket option
-d Detach from stdin
-h This help text
-i secs Delay interval for lines sent, ports scanned
-k Keep inbound sockets open for multiple connects
-l Listen mode, for inbound connects
-n Suppress name/port resolutions
-p port Specify local port for remote connects
-r Randomize remote ports
-s addr Local source address
-T ToS Set IP Type of Service
-C Send CRLF as line-ending
-t Answer TELNET negotiation
-U Use UNIX domain socket
-u UDP mode
-w secs Timeout for connects and final net reads
-X proto Proxy protocol: "4", "5" (SOCKS) or "connect"
-x addr[:port] Specify proxy address and port
-z Zero-I/O mode [used for scanning]
Port numbers can be individual or ranges: lo-hi [inclusive]
with the above you list:
lyang0 at lyang0-OptiPlex-755:~/tmp/nc110$ ./nc -help
connect to somewhere: nc [-options] hostname port[s] [ports] ...
listen for inbound: nc -l -p port [-options] [hostname] [port]
-g gateway source-routing hop point[s], up to 8
-G num source-routing pointer: 4, 8, 12, ...
-h this cruft
-i secs delay interval for lines sent, ports scanned
-l listen mode, for inbound connects
-n numeric-only IP addresses, no DNS
-o file hex dump of traffic
-p port local port number
-r randomize local and remote ports
-s addr local source address
-u UDP mode
-v verbose [use twice to be more verbose]
-w secs timeout for connects and final net reads
-z zero-I/O mode [used for scanning]
port numbers can be individual or ranges: lo-hi [inclusive]
it has no "-U" flag, can you point me where I get this version
>> I have to quesion:
>> 1)where to download it's source it for "netcat"
> They can be found in /usr/src/contrib/netcat/ once you have
> extracted the source distribution of FreeBSD. Depending on
> which version of the OS (branch, revision, platform) you
> need, you have to select the corresponding archive from
> one of the download mirrors.
> Visit http://www.freebsd.org/ to find out where and how
> to obtain FreeBSD (or components of it). I would suggest
> using one of the FTP servers that are accessible for you
> at a good speed.
>> 2)how to build it on ubuntu with gcc? only make?
> I'm not even sure Linux will be able to compile FreeBSD
> sources. A "typical Linux build" would consist of the
> three commands
> # ./configure
> # make
> # make install
> but FreeBSD's OS sources don't need the 1st step. The
> Makefiles distributed also do use "BSD make", not "GNU make"
> (often refered to as gmake on non-Linux systems).
> If this isn't the answer to your question, feel free to be
> more specific.
> Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
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