add pkt_buff and protocol helper functions

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

1 files changed, 22 insertions, 0 deletions

diff --git a/include/libnetfilter_queue/pktbuff.h b/include/libnetfilter_queue/pktbuff.h
new file mode 100644
index 0000000..a0e7abf
--- /dev/null
+++ b/include/libnetfilter_queue/pktbuff.h
@@ -0,0 +1,22 @@
+#ifndef _PKTBUFF_H_
+#define _PKTBUFF_H_
+
+struct pkt_buff;
+
+struct pkt_buff *pktb_alloc(int family, void *data, size_t len, size_t extra);
+void pktb_free(struct pkt_buff *pktb);
+
+uint8_t *pktb_data(struct pkt_buff *pktb);
+uint32_t pktb_len(struct pkt_buff *pktb);
+
+void pktb_push(struct pkt_buff *pktb, unsigned int len);
+void pktb_pull(struct pkt_buff *pktb, unsigned int len);
+void pktb_put(struct pkt_buff *pktb, unsigned int len);
+void pktb_trim(struct pkt_buff *pktb, unsigned int len);
+unsigned int pktb_tailroom(struct pkt_buff *pktb);
+
+uint8_t *pktb_mac_header(struct pkt_buff *pktb);
+uint8_t *pktb_network_header(struct pkt_buff *pktb);
+uint8_t *pktb_transport_header(struct pkt_buff *pktb);
+
+#endif