mtcp_setsockopt 3 2017-02-02 "Linux" "mOS Library Functions Manual"
 NAME
mtcp_setsockopt - set options on mTCP/mOS sockets

 SYNOPSIS
 #include <mtcp_api.h> 
 "int mtcp_setsockopt(mctx_t " mctx ", int " sockid ", int " level ", int " optname ", const void *" optval ", socklen_t " optlen ); 

 DESCRIPTION
 mtcp_setsockopt () manipulate options for the socket referred to by the
 "sockid" descriptor. These options may exist at multiple protocol
levels. When manipulating socket options, the level at
which the options resides and the name of the option
must be specified. A user can use
 "SOL_MONSOCKET"  "level" to adjust options for monitoring sockets.

The arguments
 "optval" and
 "optlen" are used to set options values for mtcp_setsockopt().

SOL_MONSOCKET socket
 level can be used by
 mtcp_setsockopt() to set a number of attributes pertaining to the socket.


 25

 "MOS_CLIBUF"
Dynamically adjust the size of the TCP receive ring buffer
of the emulated client stack. The
 optval contains the size of the buffer that needs to be set as int, while
 optlen is equal to sizeof(int).


 "MOS_SVRBUF"
Dynamically adjust the size of the TCP receive ring buffer
of the emulated client stack. The
 optval contains the size of the buffer that needs to be set as int, while
 optlen is equal to sizeof(int).

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 RETURN VALUE
Returns 0 on success; -1 on failure. In case
of failure,
 "errno" is set appropriately.
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 ERRORS
 10
 "EACCES"  "mctx" is not valid.


 10
 "EBADF"  "sockid" is not a valid socket descriptor.


 10
 "ENOTSOCK" The socket referred to by
 "sockid" is not valid.


 10
 "ENOSYS" Either the
 "level" or the
 "optname" is not implemented.


 10
 "EPERM" Permission to access a socket option is denied.


 10
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"""".SH CONFORMING TO
""""POSIX.1-2001.
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 AUTHORS
mOS development team <[email protected]>
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 SEE ALSO
 mtcp_socket (),   mtcp_getsockopt () """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 COLOPHON
This page is part of mOS release 0.3
 "docs" section. A description of the project, and information
about reporting bugs, can be found at
\%http://mos.kaist.edu/.
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