tests: conntrackd: add cthelper-test infrastructure

This patch adds the automated testing infrastructure the user-space
helpers. Basically, this adds the `cthelper-test' program that can
be invoked from the command line:

 ./cthelper-test oracle-tns/oracle-tns-redirect.pcap tns tcp

To test the helper with one PCAP file that contains traces of Oracle TNS
traffic.

This will also allow fuzzy testing of user-space helper, for further
validation, not yet implemented.

To compile this tool, you have to run:

./configure
make check

under the qa/cthelper-test/ directory. I'm doing like this because
this directory is not included in the standalone tarball that
make distcheck generates (I don't want to bloat it with development
tools that can be retrieved from the git repository).

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/tests/conntrackd/cthelper/proto.h b/tests/conntrackd/cthelper/proto.h
new file mode 100755
index 0000000..9e99eea
--- /dev/null
+++ b/tests/conntrackd/cthelper/proto.h
@@ -0,0 +1,50 @@
+#ifndef _HELPER_H_
+#define _HELPER_H_
+
+#include <stdint.h>
+
+#include "../../../include/linux_list.h"
+
+struct nf_conntrack;
+
+struct cthelper_proto_l4_helper {
+	struct list_head	head;
+
+	unsigned int		l4protonum;
+
+	void	(*l4ct_build)(const uint8_t *pkt, struct nf_conntrack *ct);
+	int	(*l4ct_cmp_orig)(const uint8_t *pkt, struct nf_conntrack *ct);
+	int	(*l4ct_cmp_repl)(const uint8_t *pkt, struct nf_conntrack *ct);
+	int	(*l4ct_cmp_port)(struct nf_conntrack *ct, uint16_t port);
+
+	int	(*l4pkt_no_data)(const uint8_t *pkt);
+};
+
+struct cthelper_proto_l2l3_helper {
+	struct list_head	head;
+
+	unsigned int		l2protonum;
+	unsigned int		l2hdr_len;
+
+	unsigned int		l3protonum;
+
+	void	(*l3ct_build)(const uint8_t *pkt, struct nf_conntrack *ct);
+	int 	(*l3ct_cmp_orig)(const uint8_t *pkt, struct nf_conntrack *ct);
+	int 	(*l3ct_cmp_repl)(const uint8_t *pkt, struct nf_conntrack *ct);
+
+	int	(*l3pkt_hdr_len)(const uint8_t *pkt);
+	int	(*l4pkt_proto)(const uint8_t *pkt);
+};
+
+struct cthelper_proto_l2l3_helper *cthelper_proto_l2l3_helper_find(const uint8_t *pkt, unsigned int *l4protonum, unsigned int *l3hdr_len);
+void cthelper_proto_l2l3_helper_register(struct cthelper_proto_l2l3_helper *h);
+
+struct cthelper_proto_l4_helper *cthelper_proto_l4_helper_find(const uint8_t *pkt, unsigned int l4protonum);
+void cthelper_proto_l4_helper_register(struct cthelper_proto_l4_helper *h);
+
+/* Initialization of supported protocols here. */
+void l2l3_ipv4_init(void);
+void l4_tcp_init(void);
+void l4_udp_init(void);
+
+#endif