Strange "getsockopt" Solaris behavior

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LEARN ABOUT FREEBSD

sctp_opt_info

SCTP_OPT_INFO(3)					   BSD Library Functions Manual 					  SCTP_OPT_INFO(3)

NAME

     sctp_opt_info -- get SCTP socket information

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/types.h>
     #include <sys/socket.h>
     #include <netinet/sctp.h>

     int
     sctp_opt_info(int sd, sctp_assoc_t id, int opt, void *arg, socklen_t *size);

DESCRIPTION

     The sctp_opt_info() call provides a multi-os compatible method for getting specific getsockopt() data where an association identification
     needs to be passed into the operating system.  For FreeBSD a direct getsockopt() may be used, since FreeBSD has the ability to pass informa-
     tion into the operating system on a getsockopt() call.  Other operating systems may not have this ability.  For those who wish to write por-
     table code amongst multiple operating systems this call should be used for the following SCTP socket options.

     SCTP_RTOINFO

     SCTP_ASSOCINFO

     SCTP_PRIMARY_ADDR

     SCTP_PEER_ADDR_PARAMS

     SCTP_DEFAULT_SEND_PARAM

     SCTP_MAX_SEG

     SCTP_AUTH_ACTIVE_KEY

     SCTP_DELAYED_SACK

     SCTP_MAX_BURST

     SCTP_CONTEXT

     SCTP_EVENT

     SCTP_DEFAULT_SNDINFO

     SCTP_DEFAULT_PRINFO

     SCTP_STATUS

     SCTP_GET_PEER_ADDR_INFO

     SCTP_PEER_AUTH_CHUNKS

     SCTP_LOCAL_AUTH_CHUNKS

RETURN VALUES

     The call returns 0 on success and -1 upon error.

ERRORS

     The sctp_opt_info() function can return the following errors:

     [EINVAL]		The argument arg value was invalid.

     [EOPNOTSUPP]	The argument opt was not one of the above listed SCTP socket options.

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

     [ENOTSOCK] 	The argument s is not a socket.

SEE ALSO

     getsockopt(2), sctp(4)

BUGS

     Because the structure used for arg of the SCTP_MAX_BURST socket option has changed in FreeBSD 9.0 and higher, using SCTP_MAX_BURST as opt is
     only supported in FreeBSD 9.0 and higher.

BSD
								   June 18, 2011							       BSD

Programming