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authorPablo Neira Ayuso <pablo@netfilter.org>2013-05-06 13:50:45 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2013-05-06 13:55:36 +0200
commit8805831f27bc3ae5ad24cead76275645f106eac9 (patch)
treeb562ae9393649a066f8fb9abba49ba278066259e /proto.c
initial import
This tree contains the tests for conntrackd's user-space helper infrastructure. They use to live in the conntrack-tools tree. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'proto.c')
-rwxr-xr-xproto.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/proto.c b/proto.c
new file mode 100755
index 0000000..6a1f345
--- /dev/null
+++ b/proto.c
@@ -0,0 +1,49 @@
+#include <stdlib.h>
+#include <netinet/in.h>
+#include <linux/if_ether.h>
+
+#include "linux_list.h"
+#include "proto.h"
+
+static LIST_HEAD(l2l3_helper_list);
+static LIST_HEAD(l4_helper_list);
+
+struct cthelper_proto_l2l3_helper *
+cthelper_proto_l2l3_helper_find(const uint8_t *pkt,
+ unsigned int *l4protonum,
+ unsigned int *l3hdr_len)
+{
+ const struct ethhdr *eh = (const struct ethhdr *)pkt;
+ struct cthelper_proto_l2l3_helper *cur;
+
+ list_for_each_entry(cur, &l2l3_helper_list, head) {
+ if (ntohs(cur->l2protonum) == eh->h_proto) {
+ *l4protonum = cur->l4pkt_proto(pkt + ETH_HLEN);
+ *l3hdr_len = cur->l3pkt_hdr_len(pkt + ETH_HLEN);
+ return cur;
+ }
+ }
+ return NULL;
+}
+
+void cthelper_proto_l2l3_helper_register(struct cthelper_proto_l2l3_helper *h)
+{
+ list_add(&h->head, &l2l3_helper_list);
+}
+
+struct cthelper_proto_l4_helper *
+cthelper_proto_l4_helper_find(const uint8_t *pkt, unsigned int l4protocol)
+{
+ struct cthelper_proto_l4_helper *cur;
+
+ list_for_each_entry(cur, &l4_helper_list, head) {
+ if (cur->l4protonum == l4protocol)
+ return cur;
+ }
+ return NULL;
+}
+
+void cthelper_proto_l4_helper_register(struct cthelper_proto_l4_helper *h)
+{
+ list_add(&h->head, &l4_helper_list);
+}