From: Steven Barth <steven@midlink.org>
Date: Fri, 18 Oct 2013 12:18:32 +0000 (+0200)
Subject: Add option "delegate" to toggle prefix delegation
X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=commitdiff_plain;h=b08f841685bf67b3f4f8cc3e8f667c80878916a8;hp=e93c42c036c4b4df1f65f261def31cf1a429e942

Add option "delegate" to toggle prefix delegation
---

diff --git a/interface-ip.c b/interface-ip.c
index 60902f9..2280266 100644
--- a/interface-ip.c
+++ b/interface-ip.c
@@ -920,7 +920,9 @@ interface_update_prefix(struct vlist_tree *tree,
 	} else if (node_new) {
 		// Set null-route to avoid routing loops
 		system_add_route(NULL, &route);
-		interface_update_prefix_assignments(prefix_new, true);
+
+		if (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation)
+			interface_update_prefix_assignments(prefix_new, true);
 	} else if (node_old) {
 		// Remove null-route
 		interface_update_prefix_assignments(prefix_old, false);
@@ -928,11 +930,12 @@ interface_update_prefix(struct vlist_tree *tree,
 	}
 
 	if (node_old) {
-		list_del(&prefix_old->head);
+		if (prefix_old->head.next)
+			list_del(&prefix_old->head);
 		free(prefix_old);
 	}
 
-	if (node_new)
+	if (node_new && (!prefix_new->iface || !prefix_new->iface->proto_ip.no_delegation))
 		list_add(&prefix_new->head, &prefixes);
 
 }
diff --git a/interface.c b/interface.c
index 0620617..698fedb 100644
--- a/interface.c
+++ b/interface.c
@@ -43,6 +43,7 @@ enum {
 	IFACE_ATTR_IP4TABLE,
 	IFACE_ATTR_IP6TABLE,
 	IFACE_ATTR_IP6CLASS,
+	IFACE_ATTR_DELEGATE,
 	IFACE_ATTR_MAX
 };
 
@@ -61,6 +62,7 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
 	[IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
 	[IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
 	[IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
+	[IFACE_ATTR_DELEGATE] = { .name = "delegate", .type = BLOBMSG_TYPE_BOOL },
 };
 
 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
@@ -605,6 +607,8 @@ interface_init(struct interface *iface, const char *name,
 			DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
 	}
 
+	iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
+
 	iface->config_autostart = iface->autostart;
 	iface->dynamic = dynamic;
 
diff --git a/interface.h b/interface.h
index 8c69958..ca5d376 100644
--- a/interface.h
+++ b/interface.h
@@ -60,6 +60,7 @@ struct interface_ip_settings {
 	bool enabled;
 	bool no_defaultroute;
 	bool no_dns;
+	bool no_delegation;
 
 	struct vlist_tree addr;
 	struct vlist_tree route;