src: add tcp options set support

This adds support for tcp mss mangling:

nft add rule filter input tcp option maxseg size 1200

Its also possible to change other tcp option fields, but
maxseg is one of the more useful ones to change.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/tcpopt.h b/include/tcpopt.h
index f96c04c6..9be84817 100644
--- a/include/tcpopt.h
+++ b/include/tcpopt.h
@@ -3,6 +3,7 @@
 
 #include <proto.h>
 #include <exthdr.h>
+#include <statement.h>
 
 extern struct expr *tcpopt_expr_alloc(const struct location *loc,
 				      uint8_t type, uint8_t field);