[krbdev.mit.edu #1435] cygwin does not have inet_ntop when compiling kdc

[liebman@zod.com via RT]

Ken
   It seems to be working.  I've installed and authenticated!  :-)  FYI,
cygwin does not have ipv6 support.  Thanks!

       -- Chris

----- Original Message ----- 
From: "Ken Raeburn" <raeburn at mit.edu>
To: <liebman at zod.com>
Cc: <krb5-bugs at mit.edu>
Sent: Thursday, May 01, 2003 3:24 PM
Subject: Re: [krbdev.mit.edu #1435] cygwin does not have inet_ntop when
compiling kdc


> Your patches aren't consistent.  In dispatch.c, you treat
> address->contents as a sockaddr_in, but it should be an in_addr, like
> you've handled it in do_as_req.c and do_tgs_req.c.
>
> Could you try this (untested) patch to include/port-sockets.h instead?
> The files you were patching directly might need updating to include
> port-sockets.h if they aren't including it already.
>
> I haven't tried to do the IPv6 support; if Cygwin does include IPv6
> support and just doesn't supply inet_ntop, let me know, and I can
> extend this to include AF_INET6 as well.  (At the moment, our
> configure scripts turn off IPv6 support for krb5 if various types and
> functions aren't available; inet_ntop is one of them, but that can be
> changed.)
>
> The intent of port-sockets.h is that source files including it should
> be able to use a reasonably consistent interface to the socket API on
> all platforms.  It looks like all the UNIX systems we actively test on
> right now do have inet_ntop.  (We don't test on Cygwin, obviously.)
> If it's not consistently available, though, either we shouldn't use
> it, or we should be prepared to provide it.
>
> I should go back and look at the network.c case more closely; perhaps
> it should just be using getnameinfo instead of inet_ntop.
>
> Index: port-sockets.h
> ===================================================================
> RCS file: /cvs/krbdev/krb5/src/include/port-sockets.h,v
> retrieving revision 1.18
> diff -p -u -r1.18 port-sockets.h
> --- port-sockets.h 2003/01/10 19:10:30 1.18
> +++ port-sockets.h 2003/05/01 21:52:28
> @@ -153,6 +153,21 @@ typedef struct iovec sg_buf;
>  #define SHUTDOWN_WRITE 1
>  #define SHUTDOWN_BOTH 2
>
> +#ifndef HAVE_INET_NTOP
> +#define inet_ntop(AF,SRC,DST,CNT)     \
> +    ((AF) == AF_INET     \
> +     ? ((CNT) < 16     \
> + ? (SOCKET_SET_ERRNO(ENOSPC), NULL)     \
> + : (sprintf((DST), "%d.%d.%d.%d",     \
> +    ((const unsigned char *)(const void *)(SRC))[0] & 0xff,  \
> +    ((const unsigned char *)(const void *)(SRC))[1] & 0xff,  \
> +    ((const unsigned char *)(const void *)(SRC))[2] & 0xff,  \
> +    ((const unsigned char *)(const void *)(SRC))[3] & 0xff), \
> +    (DST)))     \
> +     : (SOCKET_SET_ERRNO(EAFNOSUPPORT), NULL))
> +#define HAVE_INET_NTOP
> +#endif
> +
>  #endif /* HAVE_MACSOCK_H */
>
>  #endif /* _WIN32 */
>
>
>