system-linux: make encaplimit configurable for ip6 tunnels (FS#1501)

Make encapsulation limit of IP6 tunnels configurable for the ds-lite/map
proto shell handlers as not all ISPs support the destination option header
containing the tunnel encapsulation limit value as reported in FS#1501.

The IP6 tunnel specific setting encaplimit is parsed as a nested json
data object; setting it to ignore disables the insertion of the
destination option header while a value from 0 till 255 sets the
tunnel encapsulation limit accordingly in the destination option header.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/system.c b/system.c
index e236e96..f96708d 100644
--- a/system.c
+++ b/system.c
@@ -79,6 +79,16 @@ const struct uci_blob_param_list sixrd_data_attr_list = {
 	.params = sixrd_data_attrs,
 };
 
+static const struct blobmsg_policy ipip6_data_attrs[__SIXRD_DATA_ATTR_MAX] = {
+	[IPIP6_DATA_ENCAPLIMIT] = { .name = "encaplimit", .type = BLOBMSG_TYPE_STRING },
+	[IPIP6_DATA_FMRS] = { .name = "fmrs", .type = BLOBMSG_TYPE_ARRAY },
+};
+
+const struct uci_blob_param_list ipip6_data_attr_list = {
+	.n_params = __IPIP6_DATA_ATTR_MAX,
+	.params = ipip6_data_attrs,
+};
+
 static const struct blobmsg_policy fmr_data_attrs[__FMR_DATA_ATTR_MAX] = {
 	[FMR_DATA_PREFIX6] = { .name = "prefix6", .type = BLOBMSG_TYPE_STRING },
 	[FMR_DATA_PREFIX4] = { .name = "prefix4", .type = BLOBMSG_TYPE_STRING },