Provided by: ucspi-tcp-ipv6_0.88-3_amd64 bug


       tcpclient - create an outgoing TCP connection


       tcpclient [ -46hHrRdDqQv ] [ -ilocalip ] [ -plocalport ] [ -Ttimeoutconn ] [ -llocalname ]
       [ -ttimeoutinfo ] [ -Iinterface ] host port program [ arg ...  ]


       tcpclient attempts to connect to a TCP server.  If it is successful, it runs program  with
       the  given  arguments, with descriptor 6 reading from the network and descriptor 7 writing
       to the network.

       The server's address is given by host and port.  host may be 0,  referring  to  the  local
       machine,  or  a  dotted-decimal  IP  address,  or  a  host  name; if a host has several IP
       addresses, tcpclient tries each in turn.  port may be a numeric  port  number  or  a  port

       tcpclient sets up several environment variables, as described in tcp-environ(5).


              Use localip as the IP address for the local side of the connection; quit if localip
              is not available.

              Use localport as the port number for the local side  of  the  connection;  quit  if
              localport is not available.

              Use  interface  as  the  local  network  interface.   This is only defined for IPv6
              sockets and needed if you use link-local IPv6 addresses.

              Give up on the connection attempt after timeoutconn  seconds.  Default:  60.   This
              timeout applies to each IP address tried.

       -d     (Default.)   Delay sending data for a fraction of a second whenever the remote host
              is responding slowly, to make better use of the network.

       -D     Never delay sending data; enable TCP_NODELAY.  This is appropriate for  interactive

       -q     Quiet.  Do not print any messages.

       -Q     (Default.)  Print error messages.

       -v     Verbose.  Print all available messages.


       -h     (Default.)  Look up the remote host name for TCPREMOTEHOST.

       -H     Do not look up the remote host name; unset TCPREMOTEHOST.

              Do not look up the local host name; use localname for TCPLOCALHOST.

       -r     (Default.)  Attempt to obtain TCPREMOTEINFO from the remote host.

       -R     Do not attempt to obtain TCPREMOTEINFO from the remote host.

              Give up on the TCPREMOTEINFO connection attempt after timeoutinfo seconds. Default:

       -4     Fall back to IPv4 sockets.  This is necessary for terminally  broken  systems  like
              OpenBSD  which  will  not  let  IPv6  sockets  connect to V4-mapped IPv6 addresses.
              Please note that this also applies to DNS lookups, so you will have to use  an  DNS
              resolver  with  an  IPv6 address to connect to IPv6 systems.  Use DNSCACHEIP to set
              the DNS resolver IP dynamically.

       -6     Force IPv6 mode in UCSPI environment variables, even for  IPv4  connections.   This
              will  set  $PROTO  to  TCP6  and  put  IPv4-mapped IPv6 addresses in TCPLOCALIP and


       date@(1),  finger@(1),  http@(1),  mconnect(1),  tcpcat(1),  tcpserver(1),  who@(1),  tcp-