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Xinetd flags and tcp46 socket usage to telnet / ssh via v4 and v6 addresses

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Operating Systems Linux Red Hat Xinetd flags and tcp46 socket usage to telnet / ssh via v4 and v6 addresses
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Old 03-15-2013
Xinetd flags and tcp46 socket usage to telnet / ssh via v4 and v6 addresses
Hello everyone.. I need some help in understanding the usage of tcp46 socket and xinetd.d flags..

What I'm trying to do?
I'm looking to use tenet via tcp46 socket for both ipv4 and ipv6 traffic. For this, if i set flags = IPV6 xinetd.d, telnet service, i can not telnet via V4. If I unset the flags, I can only use V4 address.

Looking into how the "xinetd" understands the flags, it looks like when flags are set IPV4, we are limited to use IPV4 to use the service. Similar is the case if we set flags to IPv6. Is this true? Please correct me if my understanding is not right here.

My question: When we want to use single socket to both use v4 and v6 address, like tcp46, should we have to enable "ipv4mappedipv6" address in the system, so that even if we set xinetd's Flag to "IPV6", we can still use them? Does this sound right?
Or is there a better way to allow both v4 and v6 traffic?

Thanks for your inputs.
Sudharshan
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LEARN ABOUT CENTOS

sctp_peeloff

SCTP_PEELOFF(3) 					     Linux Programmer's Manual						   SCTP_PEELOFF(3)

NAME

       sctp_peeloff - Branch off an association into a separate socket.

SYNOPSIS

       #include <sys/types.h>
       #include <sys/socket.h>
       #include <netinet/sctp.h>

       int sctp_peeloff(int sd, sctp_assoc_t assoc_id);

DESCRIPTION

       sctp_peeloff  branches  off  an	existing association assoc_id on a one-to-many style socket sd into a separate socket. The new socket is a
       one-to-one style socket.

       This is particularly desirable when, for instance, the application wishes to have a number of  sporadic	message  senders/receivers  remain
       under  the  original  one-to-many  style socket, but branch off those assocations carrying high volume data traffic into their own separate
       socket descriptors.

RETURN VALUE

       On success, the new socket descriptor representing the branched-off asociation is returned.  On error, -1 is returned,  and  errno  is  set
       appropriately.

ERRORS

       EBADF  sd is not a valid descriptor.

       EINVAL The assoc id passed is invalid or if the socket is a one-to-one style socket.

       ENOTSOCK
	      Argument is a descriptor for a file, not a socket.

SEE ALSO

       sctp(7)	 sctp_bindx(3),   sctp_connectx(3),   sctp_sendmsg(3),	 sctp_send(3),	 sctp_recvmsg(3),   sctp_getpaddrs(3),	sctp_getladdrs(3),
       sctp_opt_info(3),

Linux 2.6							    2005-10-25							   SCTP_PEELOFF(3)