From 5a15325f1a46b14c1bfd5f9f0ce5f465ad321031 Mon Sep 17 00:00:00 2001
From: dowright <dowright@nationofnobodies.com>
Date: Mon, 23 Aug 2021 19:32:21 -0700
Subject: [PATCH] work on new packet

---
 new_packet.pxd |  4 ++--
 new_packet.pyx | 20 ++++++++++++++++++++
 setup2.py      |  2 +-
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/new_packet.pxd b/new_packet.pxd
index abea666..e44d0e6 100644
--- a/new_packet.pxd
+++ b/new_packet.pxd
@@ -27,8 +27,8 @@ cdef extern from "netinet/tcp.h":
         u_int32_t	th_seq
         u_int32_t	th_ack
 
-        u_int8_t th_x2:4
-        u_int8_t th_off:4
+        u_int8_t th_x2
+        u_int8_t th_off
 
         u_int8_t th_flags
 
diff --git a/new_packet.pyx b/new_packet.pyx
index f70efc1..7e15c7f 100644
--- a/new_packet.pyx
+++ b/new_packet.pyx
@@ -1,3 +1,23 @@
+#!/usr/bin/env python3
+
+import socket
+
+# Constants for module users
+cdef int COPY_NONE = 0
+cdef int COPY_META = 1
+cdef int COPY_PACKET = 2
+
+cdef u_int16_t DEFAULT_MAX_QUEUELEN = 1024
+cdef u_int16_t MaxPacketSize = 0xFFFF
+
+# buffer size - metadata size
+cdef u_int16_t MaxCopySize = 4096 - 80
+
+# Socket queue should hold max number of packets of copy size bytes
+# formula: DEF_MAX_QUEUELEN * (MaxCopySize+SockOverhead) / 2
+cdef u_int32_t SockRcvSize = 1024 * 4796 // 2
+
+
 cdef class CPacket:
     '''parent class designed to index/parse full tcp/ip packets (including ethernet). two alternate
     constructors are supplied to support nfqueue or raw sockets.
diff --git a/setup2.py b/setup2.py
index 88e65c0..c471657 100644
--- a/setup2.py
+++ b/setup2.py
@@ -6,7 +6,7 @@ from Cython.Distutils import build_ext
 
 cmd = {'build_ext': build_ext}
 ext = Extension(
-    'dnx_nfqueue', sources=['new_packet.pyx'], libraries=['netfilter_queue'])
+    'new_packet', sources=['new_packet.pyx'], libraries=['netfilter_queue'])
 
 setup(
     name='DNX-NFQUEUE', cmdclass=cmd, ext_modules=cythonize(ext, language_level='3')