From: Miroslav Stampar <miroslav.stampar@gmail.com>
Date: Wed, 19 May 2021 19:46:21 +0200
Subject: Use Py_ssize_t for lengths

Origin: pcapy-ng, https://github.com/stamparm/pcapy-ng/commit/1f671809b685b13f55d8a51a42acef27b3ae97fc
Origin: pcapy-ng, https://github.com/stamparm/pcapy-ng/commit/01243484a2da987cc35224c0bd26775f6198613e
Origin: pcapy-ng, https://github.com/stamparm/pcapy-ng/commit/b3b54d35bef4e87cd45fcbc524aee5cfa7794f25
Origin: pcapy-ng, https://github.com/stamparm/pcapy-ng/commit/9d62fd8b86c0daf3749e89deb543bbf73f21fcad
Origin: pcapy-ng, https://github.com/stamparm/pcapy-ng/pull/2/commits/2a95795c87738600a9dd1bf12db674614263f93e
---
 bpfobj.cc      | 4 +++-
 pcap_pkthdr.cc | 2 ++
 pcapdumper.cc  | 4 +++-
 pcapobj.cc     | 8 +++++---
 pcapy.cc       | 2 ++
 5 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/bpfobj.cc b/bpfobj.cc
index 5e70e0b..7392130 100644
--- a/bpfobj.cc
+++ b/bpfobj.cc
@@ -7,6 +7,8 @@
  *
  */
 
+#define PY_SSIZE_T_CLEAN
+
 #include <pcap.h>
 #include <Python.h>
 
@@ -191,7 +193,7 @@ p_filter(register bpfobject* bpf, PyObject* args)
 {
   int status;
   u_char* packet;
-  unsigned int len;
+  Py_ssize_t len;
 
   if (Py_TYPE(bpf) != &BPFProgramType)
     {
diff --git a/pcap_pkthdr.cc b/pcap_pkthdr.cc
index 140eef0..75dd1f9 100644
--- a/pcap_pkthdr.cc
+++ b/pcap_pkthdr.cc
@@ -7,6 +7,8 @@
  *
  */
 
+#define PY_SSIZE_T_CLEAN
+
 #include <Python.h>
 #include <pcap.h>
 
diff --git a/pcapdumper.cc b/pcapdumper.cc
index 3baee81..04e006b 100644
--- a/pcapdumper.cc
+++ b/pcapdumper.cc
@@ -7,6 +7,8 @@
  *
  */
 
+#define PY_SSIZE_T_CLEAN
+
 #include <Python.h>
 #include <pcap.h>
 
@@ -142,7 +144,7 @@ p_dump(register pcapdumper* pp, PyObject* args)
 {
 	PyObject *pyhdr;
 	u_char *data;
-	int       len;
+	Py_ssize_t len;
 
 	if(validate_pcapdumper(pp) == false){
         return NULL;  
diff --git a/pcapobj.cc b/pcapobj.cc
index cedc9e9..00253fd 100644
--- a/pcapobj.cc
+++ b/pcapobj.cc
@@ -7,6 +7,8 @@
  *
  */
 
+#define PY_SSIZE_T_CLEAN
+
 #include <Python.h>
 #include <pcap.h>
 
@@ -393,9 +395,9 @@ PythonCallBack(u_char *user,
 	       const u_char *packetdata)
 {
   PyObject *arglist, *result;
-  unsigned int *len;
+  Py_ssize_t *len;
   PcapCallbackContext *pctx;
-  len    = (unsigned int *)&header->caplen;
+  len    = (Py_ssize_t *)&header->caplen;
   pctx = (PcapCallbackContext *)user;
 
   PyEval_RestoreThread(pctx->thread_state);
@@ -769,7 +771,7 @@ p_sendpacket(register pcapobject* pp, PyObject* args)
 {
   int status;
   unsigned char* str;
-  unsigned int length;
+  Py_ssize_t length;
 
   if (Py_TYPE(pp) != &Pcaptype)
     {
diff --git a/pcapy.cc b/pcapy.cc
index 54de2a4..6725695 100644
--- a/pcapy.cc
+++ b/pcapy.cc
@@ -7,6 +7,8 @@
  *
  */
 
+#define PY_SSIZE_T_CLEAN
+
 #include <pcap.h>
 #include <Python.h>
 #ifdef WIN32