tunnel: add erspan support

This patch extends the tunnel metadata object to define erspan tunnel
specific configurations:

 table netdev x {
        tunnel y {
                id 10
                ip saddr 192.168.2.10
                ip daddr 192.168.2.11
                sport 10
                dport 20
                ttl 10
                erspan {
                        version 1
                        index 2
                }
        }
 }

Joint work with Fernando.

Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/rule.c b/src/rule.c
index 5b79facb..2557f4cc 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -2021,6 +2021,32 @@ static void obj_print_data(const struct obj *obj,
 				  opts->nl, opts->tab, opts->tab,
 				  obj->tunnel.ttl);
 		}
+		switch (obj->tunnel.type) {
+		case TUNNEL_ERSPAN:
+			nft_print(octx, "%s%s%serspan {",
+				  opts->nl, opts->tab, opts->tab);
+			nft_print(octx, "%s%s%s%sversion %u",
+				  opts->nl, opts->tab, opts->tab, opts->tab,
+				  obj->tunnel.erspan.version);
+			if (obj->tunnel.erspan.version == 1) {
+				nft_print(octx, "%s%s%s%sindex %u",
+					  opts->nl, opts->tab, opts->tab, opts->tab,
+					  obj->tunnel.erspan.v1.index);
+			} else {
+				nft_print(octx, "%s%s%s%sdirection %s",
+					  opts->nl, opts->tab, opts->tab, opts->tab,
+					  obj->tunnel.erspan.v2.direction ? "egress"
+									  : "ingress");
+				nft_print(octx, "%s%s%s%sid %u",
+					  opts->nl, opts->tab, opts->tab, opts->tab,
+					  obj->tunnel.erspan.v2.hwid);
+			}
+			nft_print(octx, "%s%s%s}",
+				  opts->nl, opts->tab, opts->tab);
+		default:
+			break;
+		}
+
 		nft_print(octx, "%s", opts->stmt_separator);
 		break;
 	default: