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rdma_set_option(3) [debian man page]

RDMA_SET_OPTION(3)					   Librdmacm Programmer's Manual					RDMA_SET_OPTION(3)

rdma_set_option - Set communication options for an rdma_cm_id. SYNOPSIS
#include <rdma/rdma_cma.h> int rdma_set_option (struct rdma_cm_id *id, int level, int optname, void *optval, size_t optlen); ARGUMENTS
id RDMA identifier. level Protocol level of the option to set. optname Name of the option, relative to the level, to set. optval Reference to the option data. The data is dependent on the level and optname. optlen The size of the %optval buffer. DESCRIPTION
Sets communication options for an rdma_cm_id. This call is used to override the default system settings. RETURN VALUE
Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason. NOTES
Option details may be found in the relevent header files. SEE ALSO
rdma_create_id(3) librdmacm 2007-08-06 RDMA_SET_OPTION(3)

Check Out this Related Man Page

getsockopt(2)							System Calls Manual						     getsockopt(2)

       getsockopt, setsockopt - get or set options on sockets

       #include <sys/types.h>
       #include <sys/socket.h>
       getsockopt(s, level, optname, optval, optlen)
       int s, level, optname;
       char *optval;
       int *optlen;

       setsockopt(s, level, optname, optval, optlen)
       int s, level, optname;
       char *optval;
       int optlen;

       The  and  system calls manipulate options associated with a socket.  Options can exist at multiple protocol levels; they are always present
       at the uppermost socket level.

       When manipulating socket options, the level at which the option resides and the name of	the  option  must  be  specified.   To	manipulate
       options at the socket level, level is specified as SOL_SOCKET.  To manipulate options at any other level, the protocol number of the appro-
       priate protocol controlling the option must be supplied.  For example, to indicate an option is to be  interpreted  by  the  TCP  protocol,
       level should be set to the protocol number of TCP.  For further information, see

       The  parameters	optval	and  optlen  are used to access option values for For they identify a buffer in which the values for the requested
       options are to be returned.  For optlen is a value-result parameter, initially containing the size of the buffer pointed to by  optval  and
       modified on return to indicate the actual size of the value returned.  If no option value is to be supplied or returned, optval can be sup-
       plied as 0.

       The optname parameter and any specified options are passed uninterpreted to  the  appropriate  protocol	module	for  interpretation.   The
       include	file  <sys/socket.h> contains definitions for socket level options.  For further information, see Options at other protocol levels
       vary in format and name.  Consult the or reference pages for details.

Return Values
       A zero is returned if the call succeeds, and -1 is returned if it fails.

       The call fails under the following conditions:

       [EBADF]	      The argument s is not a valid descriptor.

       [ENOTSOCK]     The argument s is a file, not a socket.

       [ENOPROTOOPT]  The option is unknown.

       [EFAULT]       The address pointed to by optval is not in a valid part of the process address space.  For this error can also  be  returned
		      if optlen is not in a valid part of the process address space.

See Also
       fcntl(2), socket(2), getprotoent(3n), Guide to the Data Link Interface

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