netifd: Add interface config support to enable/disable IPv6 in the kernel per device

Main use case is being able to disable IPv6 on (a) WAN interface(s) when only IPv4 connectivity is offered or 6rd is used.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/device.c b/device.c
index 2fb68d7..f484c28 100644
--- a/device.c
+++ b/device.c
@@ -37,6 +37,7 @@ static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
 	[DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
 	[DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
 	[DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
+	[DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
 };
 
 const struct uci_blob_param_list device_attr_list = {
@@ -139,6 +140,7 @@ device_merge_settings(struct device *dev, struct device_settings *n)
 	memcpy(n->macaddr,
 		(s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
 		sizeof(n->macaddr));
+	n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 	n->flags = s->flags | os->flags;
 }
 
@@ -172,6 +174,11 @@ device_init_settings(struct device *dev, struct blob_attr **tb)
 		}
 	}
 
+	if ((cur = tb[DEV_ATTR_IPV6])) {
+		s->ipv6 = blobmsg_get_bool(cur);
+		s->flags |= DEV_OPT_IPV6;
+	}
+
 	device_set_disabled(dev, disabled);
 }
 
@@ -705,6 +712,8 @@ device_dump_status(struct blob_buf *b, struct device *dev)
 			blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
 		if (st.flags & DEV_OPT_TXQUEUELEN)
 			blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
+		if (st.flags & DEV_OPT_IPV6)
+			blobmsg_add_u8(b, "ipv6", st.ipv6);
 	}
 
 	s = blobmsg_open_table(b, "statistics");