IPv6 implementation rewritten to use getnameinfo() which is the proper

2003-09-26  Jeffrey Stedfast  <fejj@ximian.com>

	* e-host-utils.c (e_gethostbyaddr_r): IPv6 implementation
	rewritten to use getnameinfo() which is the proper function to use
	in this case. Fixes bug #46006 the Right Way (tm).

svn path=/trunk/; revision=22720

1 files changed, 5 insertions, 44 deletions

diff --git a/e-util/e-host-utils.c b/e-util/e-host-utils.c
index 1d685019cc..c4057113df 100644
--- a/e-util/e-host-utils.c
+++ b/e-util/e-host-utils.c
@@ -291,47 +291,18 @@ e_gethostbyaddr_r (const char *addr, int addrlen, int type, struct hostent *host
 		   char *buf, size_t buflen, int *herr)
 {
 #ifdef ENABLE_IPv6
-	struct addrinfo hints, *res;
-	const char *name;
 	int retval, len;
 	
-	if ((name = inet_ntop (type, addr, buf, buflen)) == NULL) {
-		if (errno == ENOSPC)
-			return ERANGE;
-		
-		return -1;
-	}
-	
-	memset (&hints, 0, sizeof (struct addrinfo));
-	hints.ai_flags = AI_CANONNAME;
-	hints.ai_family = type == AF_INET6 ? PF_INET6 : PF_INET;
-	hints.ai_socktype = 0;
-	hints.ai_protocol = 0;
-	
-	if ((retval = getaddrinfo (name, NULL, &hints, &res)) != 0) {
+	if ((retval = getnameinfo (addr, addrlen, buf, buflen, NULL, 0, NI_NAMEREQD)) != 0) {
 		*herr = ai_to_herr (retval);
 		return -1;
 	}
 	
-	/* If nodename is not null, and if requested by the AI_CANONNAME flag, the ai_canonname
-	 * field of the first returned addrinfo structure shall point to a null-terminated
-	 * string containing the canonical name corresponding to the input nodename; if the
-	 * canonical name is not available, then ai_canonname shall refer to the nodename
-	 * argument or a string with the same contents.
-	 *
-	 * Note: NetBSD seems to set res->ai_canonname to NULL in this case instead.
-	 */
-	if (!res->ai_canonname || !strcmp (res->ai_canonname, name)) {
-		*herr = HOST_NOT_FOUND;
-		return -1;
-	}
-	
-	len = ALIGN (strlen (res->ai_canonname) + 1);
-	if (buflen < IPv6_BUFLEN_MIN + len + res->ai_addrlen + sizeof (char *))
+	len = ALIGN (strlen (buf) + 1);
+	if (buflen < IPv6_BUFLEN_MIN + len + addrlen + sizeof (char *))
 		return ERANGE;
 	
 	/* h_name */
-	strcpy (buf, res->ai_canonname);
 	host->h_name = buf;
 	buf += len;
 	
@@ -341,16 +312,8 @@ e_gethostbyaddr_r (const char *addr, int addrlen, int type, struct hostent *host
 	buf += sizeof (char *);
 	
 	/* h_addrtype and h_length */
-	host->h_length = res->ai_addrlen;
-	if (res->ai_family == PF_INET6) {
-		host->h_addrtype = AF_INET6;
-		
-		addr = (char *) &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr;
-	} else {
-		host->h_addrtype = AF_INET;
-		
-		addr = (char *) &((struct sockaddr_in *) res->ai_addr)->sin_addr;
-	}
+	host->h_length = addrlen;
+	host->h_addrtype = type;
 	
 	memcpy (buf, addr, host->h_length);
 	addr = buf;
@@ -361,8 +324,6 @@ e_gethostbyaddr_r (const char *addr, int addrlen, int type, struct hostent *host
 	((char **) buf)[1] = NULL;
 	host->h_addr_list = (char **) buf;
 	
-	freeaddrinfo (res);
-	
 	return 0;
 #else /* No support for IPv6 addresses */
 #ifdef HAVE_GETHOSTBYADDR_R