From 4519eae158e7821dcd2f818eea830cfcdd4a0105 Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Fri, 30 Jan 2009 22:19:50 +0100
Subject: s4:lib/socket: don't use gethostbyname2()

metze
---
 source4/lib/socket/config.m4   |  1 -
 source4/lib/socket/socket_ip.c | 33 +++++++++++++++++++++++++--------
 2 files changed, 25 insertions(+), 9 deletions(-)

(limited to 'source4/lib')

diff --git a/source4/lib/socket/config.m4 b/source4/lib/socket/config.m4
index 9c0072dd8b..fa987a1f46 100644
--- a/source4/lib/socket/config.m4
+++ b/source4/lib/socket/config.m4
@@ -1,6 +1,5 @@
 AC_CHECK_FUNCS(writev)
 AC_CHECK_FUNCS(readv)
-AC_CHECK_FUNCS(gethostbyname2)
 
 ############################################
 # check for unix domain sockets
diff --git a/source4/lib/socket/socket_ip.c b/source4/lib/socket/socket_ip.c
index bca0aab924..cdb75fe021 100644
--- a/source4/lib/socket/socket_ip.c
+++ b/source4/lib/socket/socket_ip.c
@@ -549,19 +549,36 @@ _PUBLIC_ const struct socket_ops *socket_ipv4_ops(enum socket_type type)
 
 static struct in6_addr interpret_addr6(const char *name)
 {
-	struct hostent *he;
-	
-	if (name == NULL) return in6addr_any;
+	char addr[INET6_ADDRSTRLEN];
+	struct in6_addr dest6;
+	const char *sp = name;
+	char *p = strchr_m(sp, '%');
+	int ret;
+
+	if (sp == NULL) return in6addr_any;
 
-	if (strcasecmp(name, "localhost") == 0) {
-		name = "::1";
+	if (strcasecmp(sp, "localhost") == 0) {
+		sp = "::1";
 	}
 
-	he = gethostbyname2(name, PF_INET6);
+	/*
+	 * Cope with link-local.
+	 * This is IP:v6:addr%ifname.
+	 */
+
+	if (p && (p > sp) && (if_nametoindex(p+1) != 0)) {
+		strlcpy(addr, sp,
+			MIN(PTR_DIFF(p,sp)+1,
+				sizeof(addr)));
+		sp = addr;
+	}
 
-	if (he == NULL) return in6addr_any;
+	ret = inet_pton(AF_INET6, sp, &dest6);
+	if (ret > 0) {
+		return dest6;
+	}
 
-	return *((struct in6_addr *)he->h_addr);
+	return in6addr_any;
 }
 
 static NTSTATUS ipv6_init(struct socket_context *sock)
-- 
cgit