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Diffstat (limited to 'Doc/library/socket.rst')
| -rw-r--r-- | Doc/library/socket.rst | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Doc/library/socket.rst b/Doc/library/socket.rst index e0dbbb4c0d..f2e794980c 100644 --- a/Doc/library/socket.rst +++ b/Doc/library/socket.rst @@ -200,6 +200,23 @@ created. Socket addresses are represented as follows: .. versionadded:: 3.8 +- :const:`IPPROTO_UDPLITE` is a variant of UDP which allows you to specify + what portion of a packet is covered with the checksum. It adds two socket + options that you can change. + ``self.setsockopt(IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, length)`` will + change what portion of outgoing packets are covered by the checksum and + ``self.setsockopt(IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, length)`` will + filter out packets which cover too little of their data. In both cases + ``length`` should be in ``range(8, 2**16, 8)``. + + Such a socket should be constructed with + ``socket(AF_INET, SOCK_DGRAM, IPPROTO_UDPLITE)`` for IPv4 or + ``socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDPLITE)`` for IPv6. + + .. availability:: Linux >= 2.6.20, FreeBSD >= 10.1-RELEASE + + .. versionadded:: 3.9 + If you use a hostname in the *host* portion of IPv4/v6 socket address, the program may show a nondeterministic behavior, as Python uses the first address returned from the DNS resolution. The socket address will be resolved |