socat -h

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socat -h


socat by Gerhard Rieger and contributors - see www.dest-unreach.org
Usage:
socat [options] <bi-address> <bi-address>
  options:
     -V     print version and feature information to stdout, and exit
     -h|-?  print a help text describing command line options and addresses
     -hh    like -h, plus a list of all common address option names
     -hhh   like -hh, plus a list of all available address option names
     -d     increase verbosity (use up to 4 times; 2 are recommended)
     -D     analyze file descriptors before loop
     -ly[facility]  log to syslog, using facility (default is daemon)
     -lf<logfile>   log to file
     -ls            log to stderr (default if no other log)
     -lm[facility]  mixed log mode (stderr during initialization, then syslog)
     -lp<progname>  set the program name used for logging
     -lu            use microseconds for logging timestamps
     -lh            add hostname to log messages
     -v     verbose data traffic, text
     -x     verbose data traffic, hexadecimal
     -b<size_t>     set data buffer size (8192)
     -s     sloppy (continue on error)
     -t<timeout>    wait seconds before closing second channel
     -T<timeout>    total inactivity timeout in seconds
     -u     unidirectional mode (left to right)
     -U     unidirectional mode (right to left)
     -g     do not check option groups
     -L <lockfile>  try to obtain lock, or fail
     -W <lockfile>  try to obtain lock, or wait
     -4     prefer IPv4 if version is not explicitly specified
     -6     prefer IPv6 if version is not explicitly specified
  bi-address:
     pipe[,<opts>]	groups=FD,FIFO
     <single-address>!!<single-address>
     <single-address>
  single-address:
     <address-head>[,<opts>]
  address-head:
     abstract-client:<filename>	groups=FD,SOCKET,RETRY,UNIX
     abstract-connect:<filename>	groups=FD,SOCKET,RETRY,UNIX
     abstract-listen:<filename>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,UNIX
     abstract-recv:<filename>	groups=FD,SOCKET,RETRY,UNIX
     abstract-recvfrom:<filename>	groups=FD,SOCKET,CHILD,RETRY,UNIX
     abstract-sendto:<filename>	groups=FD,SOCKET,RETRY,UNIX
     create:<filename>	groups=FD,REG,NAMED
     exec:<command-line>	groups=FD,FIFO,SOCKET,EXEC,FORK,TERMIOS,PTY,PARENT,UNIX
     fd:<num>	groups=FD,FIFO,CHR,BLK,REG,SOCKET,TERMIOS,UNIX,IP4,IP6,UDP,TCP,SCTP
     gopen:<filename>	groups=FD,FIFO,CHR,BLK,REG,SOCKET,NAMED,OPEN,TERMIOS,UNIX
     interface:<interface>	groups=FD,SOCKET
     ip-datagram:<host>:<protocol>	groups=FD,SOCKET,RANGE,IP4,IP6
     ip-recv:<protocol>	groups=FD,SOCKET,RANGE,IP4,IP6
     ip-recvfrom:<protocol>	groups=FD,SOCKET,CHILD,RANGE,IP4,IP6
     ip-sendto:<host>:<protocol>	groups=FD,SOCKET,IP4,IP6
     ip4-datagram:<host>:<protocol>	groups=FD,SOCKET,RANGE,IP4
     ip4-recv:<protocol>	groups=FD,SOCKET,RANGE,IP4
     ip4-recvfrom:<protocol>	groups=FD,SOCKET,CHILD,RANGE,IP4
     ip4-sendto:<host>:<protocol>	groups=FD,SOCKET,IP4
     ip6-datagram:<host>:<protocol>	groups=FD,SOCKET,RANGE,IP6
     ip6-recv:<protocol>	groups=FD,SOCKET,RANGE,IP6
     ip6-recvfrom:<protocol>	groups=FD,SOCKET,CHILD,RANGE,IP6
     ip6-sendto:<host>:<protocol>	groups=FD,SOCKET,IP6
     open:<filename>	groups=FD,FIFO,CHR,BLK,REG,NAMED,OPEN,TERMIOS
     openssl:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,IP6,TCP,OPENSSL
     openssl-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE,IP4,IP6,TCP,OPENSSL
     pipe:<filename>	groups=FD,FIFO,NAMED,OPEN
     proxy:<proxy-server>:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,IP6,TCP,HTTP
     pty	groups=FD,NAMED,TERMIOS,PTY
     sctp-connect:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,IP6,SCTP
     sctp-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE,IP4,IP6,SCTP
     sctp4-connect:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,SCTP
     sctp4-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE,IP4,SCTP
     sctp6-connect:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP6,SCTP
     sctp6-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE,IP6,SCTP
     socket-connect:<domain>:<protocol>:<remote-address>	groups=FD,SOCKET,CHILD,RETRY
     socket-datagram:<domain>:<type>:<protocol>:<remote-address>	groups=FD,SOCKET,RANGE
     socket-listen:<domain>:<protocol>:<local-address>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE
     socket-recv:<domain>:<type>:<protocol>:<local-address>	groups=FD,SOCKET,RANGE
     socket-recvfrom:<domain>:<type>:<protocol>:<local-address>	groups=FD,SOCKET,CHILD,RANGE
     socket-sendto:<domain>:<type>:<protocol>:<remote-address>	groups=FD,SOCKET
     socks4:<socks-server>:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,IP6,TCP,SOCKS4
     socks4a:<socks-server>:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,IP6,TCP,SOCKS4
     stderr	groups=FD,FIFO,CHR,BLK,REG,SOCKET,TERMIOS,UNIX,IP4,IP6,UDP,TCP,SCTP
     stdin	groups=FD,FIFO,CHR,BLK,REG,SOCKET,TERMIOS,UNIX,IP4,IP6,UDP,TCP,SCTP
     stdio	groups=FD,FIFO,CHR,BLK,REG,SOCKET,TERMIOS,UNIX,IP4,IP6,UDP,TCP,SCTP
     stdout	groups=FD,FIFO,CHR,BLK,REG,SOCKET,TERMIOS,UNIX,IP4,IP6,UDP,TCP,SCTP
     system:<shell-command>	groups=FD,FIFO,SOCKET,EXEC,FORK,TERMIOS,PTY,PARENT,UNIX
     tcp-connect:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,IP6,TCP
     tcp-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE,IP4,IP6,TCP
     tcp4-connect:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP4,TCP
     tcp4-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE,IP4,TCP
     tcp6-connect:<host>:<port>	groups=FD,SOCKET,CHILD,RETRY,IP6,TCP
     tcp6-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RETRY,RANGE,IP6,TCP
     tun[:<ip-addr>/<bits>]	groups=FD,CHR,NAMED,OPEN,INTERFACE
     udp-connect:<host>:<port>	groups=FD,SOCKET,IP4,IP6,UDP
     udp-datagram:<host>:<port>	groups=FD,SOCKET,RANGE,IP4,IP6,UDP
     udp-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RANGE,IP4,IP6,UDP
     udp-recv:<port>	groups=FD,SOCKET,RANGE,IP4,IP6,UDP
     udp-recvfrom:<port>	groups=FD,SOCKET,CHILD,RANGE,IP4,IP6,UDP
     udp-sendto:<host>:<port>	groups=FD,SOCKET,IP4,IP6,UDP
     udp4-connect:<host>:<port>	groups=FD,SOCKET,IP4,UDP
     udp4-datagram:<remote-address>:<port>	groups=FD,SOCKET,RANGE,IP4,UDP
     udp4-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RANGE,IP4,UDP
     udp4-recv:<port>	groups=FD,SOCKET,RANGE,IP4,UDP
     udp4-recvfrom:<host>:<port>	groups=FD,SOCKET,CHILD,RANGE,IP4,UDP
     udp4-sendto:<host>:<port>	groups=FD,SOCKET,IP4,UDP
     udp6-connect:<host>:<port>	groups=FD,SOCKET,IP6,UDP
     udp6-datagram:<host>:<port>	groups=FD,SOCKET,RANGE,IP6,UDP
     udp6-listen:<port>	groups=FD,SOCKET,LISTEN,CHILD,RANGE,IP6,UDP
     udp6-recv:<port>	groups=FD,SOCKET,RANGE,IP6,UDP
     udp6-recvfrom:<port>	groups=FD,SOCKET,CHILD,RANGE,IP6,UDP
     udp6-sendto:<host>:<port>	groups=FD,SOCKET,IP6,UDP
     unix-client:<filename>	groups=FD,SOCKET,NAMED,RETRY,UNIX
     unix-connect:<filename>	groups=FD,SOCKET,NAMED,RETRY,UNIX
     unix-listen:<filename>	groups=FD,SOCKET,NAMED,LISTEN,CHILD,RETRY,UNIX
     unix-recv:<filename>	groups=FD,SOCKET,NAMED,RETRY,UNIX
     unix-recvfrom:<filename>	groups=FD,SOCKET,NAMED,CHILD,RETRY,UNIX
     unix-sendto:<filename>	groups=FD,SOCKET,NAMED,RETRY,UNIX


See also

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