Strange "getsockopt" Solaris behavior

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LEARN ABOUT FREEBSD

sctp_getaddrlen

SCTP_GETADDRLEN(3)					   BSD Library Functions Manual 					SCTP_GETADDRLEN(3)

NAME

     sctp_getaddrlen -- return the address length of an address family

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

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

     int
     sctp_getaddrlen(sa_family_t family);

DESCRIPTION

     The sctp_getaddrlen() function returns the size of a specific address family.  This function is provided for application binary compatibility
     since it provides the application with the size the operating system thinks the specific address family is.  Note that the function will
     actually create an SCTP socket and then gather the information via a getsockopt() system calls.  If for some reason a SCTP socket cannot be
     created or the getsockopt() call fails, an error will be returned with errno set as specified in the socket() or getsockopt() system call.

RETURN VALUES

     The call returns the number of bytes that the operating system expects for the specific address family or -1.

ERRORS

     The sctp_getaddrlen() function can return the following errors:

     [EINVAL]		The address family specified does NOT exist.

SEE ALSO

     getsockopt(2), socket(2), sctp(4)

BSD
								 December 15, 2006							       BSD

Programming