[PATCH iproute2] link_gre6: really support encaplimit option

[Nicolas Dichtel]

This option is documented in gre6 help, but was not supported.

Fixes: af89576d7a8c ("iproute2: GRE over IPv6 tunnel support.")
Signed-off-by: Nicolas Dichtel <nicolas.dich...@6wind.com>
---
 ip/link_gre6.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ip/link_gre6.c b/ip/link_gre6.c
index 205bada78054..4d3d4b54210b 100644
--- a/ip/link_gre6.c
+++ b/ip/link_gre6.c
@@ -355,6 +355,18 @@ get_failed:
                                        invarg("invalid fwmark\n", *argv);
                                flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
                        }
+               } else if (strcmp(*argv, "encaplimit") == 0) {
+                       NEXT_ARG();
+                       if (strcmp(*argv, "none") == 0) {
+                               flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
+                       } else {
+                               __u8 uval;
+
+                               if (get_u8(&uval, *argv, 0) < -1)
+                                       invarg("invalid ELIM", *argv);
+                               encap_limit = uval;
+                               flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
+                       }
                } else
                        usage();
                argc--; argv++;
-- 
2.8.1