Author: Ken Zhu <guigenz@codeaurora.org>
Date:   Mon Mar 12 11:23:11 2018 -0700

    netifd: add rfc7597 draft03 version support for tunipip6

    draft03 version of rfc7597 has a little different from
    the standard version.

    Change-Id: Ide3692ffd763c1741c96134b5df42446045f85bf
    Signed-off-by: Ken Zhu <guigenz@codeaurora.org>

diff -Nur a/system.c netifd-2019-08-05-5e02f944/system.c
--- a/system.c	2020-11-11 17:40:14.360936791 -0800
+++ netifd-2019-08-05-5e02f944/system.c	2020-11-11 17:40:28.996873250 -0800
@@ -89,9 +89,10 @@
 	.params = sixrd_data_attrs,
 };
 
-static const struct blobmsg_policy ipip6_data_attrs[__SIXRD_DATA_ATTR_MAX] = {
+static const struct blobmsg_policy ipip6_data_attrs[__IPIP6_DATA_ATTR_MAX] = {
 	[IPIP6_DATA_ENCAPLIMIT] = { .name = "encaplimit", .type = BLOBMSG_TYPE_STRING },
 	[IPIP6_DATA_FMRS] = { .name = "fmrs", .type = BLOBMSG_TYPE_ARRAY },
+	[IPIP6_DATA_DRAFT03] = { .name = "draft03", .type = BLOBMSG_TYPE_INT32 },
 };
 
 const struct uci_blob_param_list ipip6_data_attr_list = {
diff -Nur a/system.h netifd-2019-08-05-5e02f944/system.h
--- a/system.h	2020-11-11 17:40:14.364936773 -0800
+++ netifd-2019-08-05-5e02f944/system.h	2020-11-11 17:40:28.996873250 -0800
@@ -77,6 +77,7 @@
 enum ipip6_data {
 	IPIP6_DATA_ENCAPLIMIT,
 	IPIP6_DATA_FMRS,
+	IPIP6_DATA_DRAFT03,
 	__IPIP6_DATA_ATTR_MAX
 };
 
diff -Nur a/system-linux.c netifd-2019-08-05-5e02f944/system-linux.c
--- a/system-linux.c	2020-11-11 17:40:14.360936791 -0800
+++ netifd-2019-08-05-5e02f944/system-linux.c	2020-11-11 17:45:05.427539372 -0800
@@ -2673,6 +2673,18 @@
 			}
 		}
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0)
+		unsigned int draft03 = 0;
+		if ((cur = tb[IPIP6_DATA_DRAFT03])) {
+			draft03 = blobmsg_get_u32(cur);
+			if (ttl > 255)
+				return -EINVAL;
+			if (draft03)
+				nla_put_u8(nlm, IFLA_IPTUN_DRAFT03, 1);
+		}
+
+#endif
+
 #ifdef IFLA_IPTUN_FMR_MAX
 		if ((cur = tb_data[IPIP6_DATA_FMRS])) {
 			struct blob_attr *rcur;