path: root/include/exthdr.h
diff options
authorPhil Sutter <>2017-03-10 18:13:51 +0100
committerPablo Neira Ayuso <>2017-03-10 19:01:21 +0100
commite02bd59c4009bedba89da88b199e715441975439 (patch)
tree89dd9f1959adf4065d23da80053e119fe1483500 /include/exthdr.h
parent627be570eff8f05849614a257e6fa45c744f4dbd (diff)
exthdr: Implement existence check
This allows to check for existence of an IPv6 extension or TCP option header by using the following syntax: | exthdr frag exists | tcpopt window exists Signed-off-by: Phil Sutter <> Signed-off-by: Pablo Neira Ayuso <>
Diffstat (limited to 'include/exthdr.h')
1 files changed, 2 insertions, 0 deletions
diff --git a/include/exthdr.h b/include/exthdr.h
index c7f806eb..a2647ee1 100644
--- a/include/exthdr.h
+++ b/include/exthdr.h
@@ -21,6 +21,8 @@ extern struct expr *exthdr_expr_alloc(const struct location *loc,
const struct exthdr_desc *desc,
uint8_t type);
+extern const struct exthdr_desc *exthdr_find_proto(uint8_t proto);
extern void exthdr_init_raw(struct expr *expr, uint8_t type,
unsigned int offset, unsigned int len,
enum nft_exthdr_op op, uint32_t flags);