1. inet_ntoa( ) linux
- Posted by cense <cense at MAIL.RU>
Nov 23, 2000
-
Last edited Nov 24, 2000
hey all,
i have one question about the C routine, inet_ntoa( ) in a Linux system.
i am attempting to wrap this function nicely and here is what i have so far:
-- include mixedlib.e
global
function inet_ntoa( ulong s_addr )
pointer in_addr_ptr, char_str
sequence char_seq
in_addr_ptr = struc( get_in_addr_seq( ), HIGH )
Sets( in_addr_ptr, "s_addr", s_addr )
char_str = c_func( inet_ntoa_, { in_addr_ptr } )
char_seq = str2seq( char_str )
frees( in_addr_ptr )
return char_seq
end function
The problem im having is what char_str points to after the call to inet_ntoa. I
always get some randomish IP in dot-notation being returned with the two last
sections always being ?.?.17.8. This seems rather odd to me. i know that the
s_addr im passing is valid because it never changes value on connections made
from the same client. localhost s_addr is always 16777343.
I think this all has to do with the statically allocated char * that inet_ntoa
returns. Does anyone have an idea? ive tried a lot of things and im really
getting lost.
Thanks for any help on this one.
--
evil, corruption and bad taste
^[cense]
2. Re: inet_ntoa( ) linux
On Thu, 23 Nov 2000 21:35:28 -0700, cense <cense at MAIL.RU> wrote:
cense:
This is the correct code.
-- Define ALL of your STATIC function,variable, or structure at the
beginning
-- of your program outside of your functions.
-- STATIC means that a function,variable, or structure needs to be available
-- through out the scope of your whole program any function or variable
-- defined within a function is will be destroy when you leave the function.
-- include mixedlib.e
inet_ntoa_ = define_c_func(YOUR_LIB, "inet_ntoa",{C_POINTER}, C_POINTER)
-- internet numeric to ascii function
-- This function takes a 4 byte POINTER to a in_addr and converts
-- the internet HOST numeric address to a STRING in the standard number/dots
-- notation form.
global
function inet_ntoa( pointer sin_addr )
--
return str2seq( c_func( inet_ntoa_, { sin_addr_ptr } ) )
--
end function
Bernie
