Finished adapting the code to tcp packets (+ researched a lot about xdp and ebpf, we should be OK with xdps, found a lot of ideas)

src/include/packet_manager.h

@@ -0,0 +1,13 @@
+#ifndef __PACKET_MANAGER_H__
+#define __PACKET_MANAGER_H__
+#include <linux/bpf.h>
+#include <linux/if_ether.h>
+
+static __always_inline int ethernet_header_bound_check(struct ethhdr *eth, void* data_end){
+    if ((void *)eth + sizeof(struct ethhdr) > data_end){
+        return -1;
+    }
+    return 0; //OK
+}
+
+#endif