Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
From: =?ISO-8859-1?Q?Ren=E9_Berber?= <rberber AT prodigy DOT net DOT mx>
Subject:  Re: inet_pton() error. Does Cygwin support inet_pton()?
Date:  Fri, 17 Jun 2005 09:35:59 -0500
Lines: 60
Message-ID: <d8ump9$afj$1@sea.gmane.org>
References:  <00a401c572e8$90d2f250$0302a8c0 AT SERVER>
Mime-Version:  1.0
Content-Type:  text/plain; charset=ISO-8859-1
Content-Transfer-Encoding:  8bit
User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317)
In-Reply-To: <00a401c572e8$90d2f250$0302a8c0@SERVER>
X-IsSubscribed: yes

Fernando Barsoba wrote:
> 
> I'm trying to use the function inet_pton(), but I found the following
> error when trying to build the application with Eclipse/CDT on Cygwin:
[snip]

If you don't need IPv6 in your application you can add tbe following implementation:

#ifdef __CYGWIN__

/* From:
 *  UNIX Network Programming: Sockets Introduction
 *  By Andrew M. Rudoff, Bill Fenner, W. Richard Stevens.
 *  Prentice Hall PTR. Feb 27, 2004.
 */
#define INET_ADDRSTRLEN       16       /* for IPv4 dotted-decimal */

int inet_pton(int family, const char *strptr, void *addrptr)
{
    if (family == AF_INET) {
        struct in_addr in_val;

        if (inet_aton(strptr, &in_val)) {
            memcpy(addrptr, &in_val, sizeof(struct in_addr));
            return (1);
        }
        return (0);
    }
    errno = EAFNOSUPPORT;
    return (-1);
}

const char *inet_ntop(int family, const void *addrptr, char *strptr, size_t len)
{
    const u_char *p = (const u_char *) addrptr;

    if (family == AF_INET) {
        char    temp[INET_ADDRSTRLEN];

        snprintf(temp, sizeof(temp), "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
        if (strlen(temp) >= len) {
            errno = ENOSPC;
            return (NULL);
        }
        strcpy(strptr, temp);
        return (strptr);
    }
    errno = EAFNOSUPPORT;
    return (NULL);
}

#endif


I've used this and getaddrinfo() from the postgress port to compile clamsmtpd,
and it works fine.

HTH,
-- 
René Berber


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/