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Full Discussion: IPv4 LSRR Option
Top Forums Programming IPv4 LSRR Option Post 302198006 by aamirglb on Thursday 22nd of May 2008 04:41:18 AM
Old 05-22-2008
IPv4 LSRR Option

Hello Friends,
I have one doubt regarding LSRR (Loose Source and Record Route) IP option.
Whether IPv4 optoins will be processed only by Router or they can be processed by any PC within the network??
What i'm trying is: i'm giving a list of IP address in the option using setsockopt system call, say:

IP-1 => 192.168.0.1
IP-2 => 192.168.0.2
IP-1 => 192.168.0.3
IP-2 => 192.168.0.4 ==> This is the destination PC

All these system are connected in a LAN and are running Windows OS. But the system on which this program is run has Linux.
If I send a datagram using SOCK_DGRAM socket, I'm able to receive the packet only in 192.168.0.1. This PC (192.168.0.1) is not forwarding the IP packet to the next PC in the list i.e., 192.168.0.2.

Can please any one clarify whether ip options can be processed by all the PC or only Routers can process it.

Thanks in Advance.

Regards,
Md. Aamir Ali
Bangalore
 

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FINDSMB(1)							   User Commands							FINDSMB(1)

NAME
findsmb - list info about machines that respond to SMB name queries on a subnet SYNOPSIS
findsmb [subnet broadcast address] DESCRIPTION
This perl script is part of the samba(7) suite. findsmb is a perl script that prints out several pieces of information about machines on a subnet that respond to SMB name query requests. It uses nmblookup(1) and smbclient(1) to obtain this information. OPTIONS
-r Controls whether findsmb takes bugs in Windows95 into account when trying to find a Netbios name registered of the remote machine. This option is disabled by default because it is specific to Windows 95 and Windows 95 machines only. If set, nmblookup(1) will be called with -B option. subnet broadcast address Without this option, findsmb will probe the subnet of the machine where findsmb(1) is run. This value is passed to nmblookup(1) as part of the -B option. EXAMPLES
The output of findsmb lists the following information for all machines that respond to the initial nmblookup for any name: IP address, NetBIOS name, Workgroup name, operating system, and SMB server version. There will be a '+' in front of the workgroup name for machines that are local master browsers for that workgroup. There will be an '*' in front of the workgroup name for machines that are the domain master browser for that workgroup. Machines that are running Windows for Workgroups, Windows 95 or Windows 98 will not show any information about the operating system or server version. The command with -r option must be run on a system without nmbd(8) running. If nmbd is running on the system, you will only get the IP address and the DNS name of the machine. To get proper responses from Windows 95 and Windows 98 machines, the command must be run as root and with -r option on a machine without nmbd running. For example, running findsmb without -r option set would yield output similar to the following IP ADDR NETBIOS NAME WORKGROUP/OS/VERSION --------------------------------------------------------------------- 192.168.35.10 MINESET-TEST1 [DMVENGR] 192.168.35.55 LINUXBOX *[MYGROUP] [Unix] [Samba 2.0.6] 192.168.35.56 HERBNT2 [HERB-NT] 192.168.35.63 GANDALF [MVENGR] [Unix] [Samba 2.0.5a for IRIX] 192.168.35.65 SAUNA [WORKGROUP] [Unix] [Samba 1.9.18p10] 192.168.35.71 FROGSTAR [ENGR] [Unix] [Samba 2.0.0 for IRIX] 192.168.35.78 HERBDHCP1 +[HERB] 192.168.35.88 SCNT2 +[MVENGR] [Windows NT 4.0] [NT LAN Manager 4.0] 192.168.35.93 FROGSTAR-PC [MVENGR] [Windows 5.0] [Windows 2000 LAN Manager] 192.168.35.97 HERBNT1 *[HERB-NT] [Windows NT 4.0] [NT LAN Manager 4.0] VERSION
This man page is correct for version 3 of the Samba suite. SEE ALSO
nmbd(8), smbclient(1), and nmblookup(1) AUTHOR
The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed. The original Samba man pages were written by Karl Auer. The man page sources were converted to YODL format (another excellent piece of Open Source software, available at ftp://ftp.icce.rug.nl/pub/unix/) and updated for the Samba 2.0 release by Jeremy Allison. The conversion to DocBook for Samba 2.2 was done by Gerald Carter. The conversion to DocBook XML 4.2 for Samba 3.0 was done by Alexander Bokovoy. Samba 3.5 06/18/2010 FINDSMB(1)
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