diff --git a/include/packet_buffer.h b/include/packet_buffer.h
new file mode 100644
index 0000000..a8564dd
--- /dev/null
+++ b/include/packet_buffer.h
@@ -0,0 +1,11 @@
+#pragma once
+#include <stddef.h>
+
+#define PACKET_BUFFER_SIZE 512
+
+struct PacketBuffer {
+    char buf[PACKET_BUFFER_SIZE];
+    size_t pos;
+};
+
+struct PacketBuffer *new_packet_buffer();
diff --git a/src/main.c b/src/main.c
index f133f45..4677814 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,8 +1,11 @@
-#include "pupdns.h"
+#include <stdio.h>
+#include "packet_buffer.h"
 
 int main()
 {
-    printf("Hello, world!\n");
+    struct PacketBuffer *buf = new_packet_buffer();
+
+    printf("size: %ld\n", sizeof(buf->buf));
 
     return 0;
 }
diff --git a/src/packet_buffer.c b/src/packet_buffer.c
new file mode 100644
index 0000000..1826a6f
--- /dev/null
+++ b/src/packet_buffer.c
@@ -0,0 +1,9 @@
+#include "packet_buffer.h"
+#include <stdlib.h>
+
+struct PacketBuffer *new_packet_buffer()
+{
+    struct PacketBuffer *buf;
+    buf = malloc(sizeof(struct PacketBuffer));
+    return buf;
+}