+#ifdef IFLA_VTI_MAX
+static int system_add_vti_tunnel(const char *name, const char *kind,
+ const unsigned int link, struct blob_attr **tb, bool v6)
+{
+ struct nl_msg *nlm;
+ struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
+ struct blob_attr *cur;
+ uint32_t ikey = 0, okey = 0;
+ int ret = 0;
+
+ nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
+ if (!nlm)
+ return -1;
+
+ nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
+ nla_put_string(nlm, IFLA_IFNAME, name);
+
+ struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
+ if (!linkinfo) {
+ ret = -ENOMEM;
+ goto failure;
+ }
+
+ nla_put_string(nlm, IFLA_INFO_KIND, kind);
+ struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
+ if (!infodata) {
+ ret = -ENOMEM;
+ goto failure;
+ }
+
+ if (link)
+ nla_put_u32(nlm, IFLA_VTI_LINK, link);
+
+ if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
+ if (sscanf(blobmsg_get_string(cur), "%u,%u",
+ &ikey, &okey) < 2) {
+ ret = -EINVAL;
+ goto failure;
+ }
+ }
+
+ if (v6) {
+ struct in6_addr in6buf;
+ if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
+ if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
+ ret = -EINVAL;
+ goto failure;
+ }
+ nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
+ }
+
+ if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
+ if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
+ ret = -EINVAL;
+ goto failure;
+ }
+ nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
+ }
+
+ } else {
+ struct in_addr inbuf;
+
+ if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
+ if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
+ ret = -EINVAL;
+ goto failure;
+ }
+ nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
+ }
+
+ if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
+ if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
+ ret = -EINVAL;
+ goto failure;
+ }
+ nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
+ }
+
+ }
+
+ if (okey)
+ nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
+
+ if (ikey)
+ nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
+
+ nla_nest_end(nlm, infodata);
+ nla_nest_end(nlm, linkinfo);
+
+ return system_rtnl_call(nlm);
+
+failure:
+ nlmsg_free(nlm);
+ return ret;
+}
+#endif
+