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demi_getsockopt.md

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demi_setsockopt()

Name

demi_setsockopt - Gets a socket option on a socket I/O queue.

Synopsis

#include <demi/libos.h>
#include <sys/socket.h> /* For SOL_SOCKET. */

int demi_setsockopt(int sockqd, int level, int optname, const void *optval, socklen_t optlen);

Description

demi_getsockopt() gets the option specified by the optname argument, at the protocol level specified by the level argument, to the value pointed to by the optval argument for the socket I/O queue associated with queue descriptor specified by the socketqd argument.

Currently the following values for level are supported:

  • SOL_SOCKET - Socket-level options.

Currently the following values for option are supported:

  • SO_LINGER - Linger on/off and linger time in seconds, for queued, unsent data on demi_close().
  • SO_KEEPALIVE - Whether connections should be kept alive. On Linux, this is a boolean flag. On Windows, this includes a boolean flag, a keep alive time and a keep alive interval.
  • SO_NODELAY - Nagle algoirthm on/off.

Return Value

On success, zero is returned. On error, a positive error code is returned.

Errors

On error, one of the following positive error codes is returned:

  • EBADF - The specified sockqd is invalid.
  • EINVAL - The specified optval is invalid.
  • EINVAL - The specified optlen is invalid.
  • ENOPROTOOPT - The specified optname is not supported.
  • ENOTSUP - The specified level is not supported.

Disclaimer

Any behavior that is not documented in this manual page is unintentional and should be reported.

See Also

demi_setsockopt()