|Newer page:||version 4||Last edited on Wednesday, June 10, 2009 2:41:13 pm||by PerryLorier|
|Older page:||version 3||Last edited on Tuesday, November 11, 2003 11:47:15 am||by JohnMcPherson||Revert|
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This is an error you get when you try to connect(2) or bind(2) a socket to an address where that address doesn't make sense. For example trying to bind a socket created with PF_INET (Protocol Family Internet) to a AF_UNIX (Address Family Unix Domain Socket) address, it just doesn't make sense. Alternatively you forgot to fill in the sin_family or uin_family field in your address structure. Either way the programmer screwed up.
This can also occur if the OperatingSystem does not support a particular protocol. For example:
$ ping6 ::1
ping6: socket: Address family not supported by protocol
$ strace ping6 ::1
socket(PF_INET6, SOCK_RAW, 58) = -1 EAFNOSUPPORT (Address family not
supported by protocol)
In this case, the machine does not have [IPv6] support, but a program tried to use it.