Module sockopt

Socket options as used by setsockopt and getsockopt.

Structs

• AcceptConn
  Returns a value indicating whether or not this socket has been marked to accept connections with listen(2).
• AlgSetAeadAuthSize
• AlgSetKey
• BindToDevice
  Bind this socket to a particular device like “eth0”.
• Broadcast
  Set or get the broadcast flag.
• DontRoute
  Set or get the don’t route flag.
• Ip6tOriginalDst
• IpMtu
  Fetch the current system-estimated Path MTU.
• Ipv4RecvErr
  Enable extended reliable error message passing.
• Ipv4Ttl
  Set or retrieve the current time-to-live field that is used in every packet sent from this socket.
• Ipv6DontFrag
  Set “don’t fragment packet” flag on the IPv6 packet.
• Ipv6RecvErr
  Control receiving of asynchronous error options.
• Ipv6Ttl
  Set the unicast hop limit for the socket.
• KeepAlive
  Enable sending of keep-alive messages on connection-oriented sockets.
• Linger
  When enabled, a close(2) or shutdown(2) will not return until all queued messages for the socket have been successfully sent or the linger timeout has been reached.
• Mark
  Set the mark for each packet sent through this socket (similar to the netfilter MARK target but socket-based).
• OobInline
  If this option is enabled, out-of-band data is directly placed into the receive data stream.
• PassCred
  Enable or disable the receiving of the SCM_CREDENTIALS control message.
• PeerCredentials
  Return the credentials of the foreign process connected to this socket.
• RcvBuf
  Sets or gets the maximum socket receive buffer in bytes.
• RcvBufForce
  Using this socket option, a privileged (CAP_NET_ADMIN) process can perform the same task as SO_RCVBUF, but the rmem_max limit can be overridden.
• ReceiveTimeout
  Specify the receiving timeout until reporting an error.
• ReceiveTimestamp
  Enable or disable the receiving of the SO_TIMESTAMP control message.
• ReceiveTimestampns
  Enable or disable the receiving of the SO_TIMESTAMPNS control message.
• ReuseAddr
  Enables local address reuse
• ReusePort
  Permits multiple AF_INET or AF_INET6 sockets to be bound to an identical socket address.
• RxqOvfl
  Indicates that an unsigned 32-bit value ancillary message (cmsg) should be attached to received skbs indicating the number of packets dropped by the socket since its creation.
• SendTimeout
  Specify the sending timeout until reporting an error.
• SndBuf
  Sets or gets the maximum socket send buffer in bytes.
• SndBufForce
  Using this socket option, a privileged (CAP_NET_ADMIN) process can perform the same task as SO_SNDBUF, but the wmem_max limit can be overridden.
• SockType
  Gets the socket type as an integer.
• SocketError
  Get and clear the pending socket error.
• TcpMaxSeg
  The maximum segment size for outgoing TCP packets.
• TcpRepair
• Timestamping
  Specifies exact type of timestamping information collected by the kernel Further reading
• TxTime
  Configures the behavior of time-based transmission of packets, for use with the TxTime control message.