This is the libnftnl change for the overall changes with this
description:
Add capability to have rules matching IPv4 options. This is developed
mainly to support dropping of IP packets with loose and/or strict source
route route options. Nevertheless, the implementation include others and
ability to get specific fields in the option.
Signed-off-by: Stephen Suryaputra <ssuryaextr@xxxxxxxxx>
---
include/linux/netfilter/nf_tables.h | 2 ++
src/expr/exthdr.c | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/include/linux/netfilter/nf_tables.h b/include/linux/netfilter/nf_tables.h
index fd38cdc..a5e9bf3 100644
--- a/include/linux/netfilter/nf_tables.h
+++ b/include/linux/netfilter/nf_tables.h
@@ -729,10 +729,12 @@ enum nft_exthdr_flags {
*
* @NFT_EXTHDR_OP_IPV6: match against ipv6 extension headers
* @NFT_EXTHDR_OP_TCP: match against tcp options
+ * @NFT_EXTHDR_OP_IPV4: match against ipv4 options
*/
enum nft_exthdr_op {
NFT_EXTHDR_OP_IPV6,
NFT_EXTHDR_OP_TCPOPT,
+ NFT_EXTHDR_OP_IPV4,
__NFT_EXTHDR_OP_MAX
};
#define NFT_EXTHDR_OP_MAX (__NFT_EXTHDR_OP_MAX - 1)
diff --git a/src/expr/exthdr.c b/src/expr/exthdr.c
index bef453e..e5f714b 100644
--- a/src/expr/exthdr.c
+++ b/src/expr/exthdr.c
@@ -200,6 +200,9 @@ static const char *op2str(uint8_t op)
case NFT_EXTHDR_OP_TCPOPT:
return " tcpopt";
case NFT_EXTHDR_OP_IPV6:
+ return " ipv6";
+ case NFT_EXTHDR_OP_IPV4:
+ return " ipv4";
default:
return "";
}
@@ -209,6 +212,8 @@ static inline int str2exthdr_op(const char* str)
{
if (!strcmp(str, "tcpopt"))
return NFT_EXTHDR_OP_TCPOPT;
+ if (!strcmp(str, "ipv4"))
+ return NFT_EXTHDR_OP_IPV4;
/* if str == "ipv6" or anything else */
return NFT_EXTHDR_OP_IPV6;
--
2.17.1
