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/*
* Copyright (c) 2003 CORE Security Technologies
*
* This software is provided under under a slightly modified version
* of the Apache Software License. See the accompanying LICENSE file
* for more information.
*
* $Id: pcap_pkthdr.cc 21 2003-10-23 20:00:54Z jkohen $
*/
#include <Python.h>
#include <pcap.h>
#include "pcapy.h"
#include "pcap_pkthdr.h"
#ifdef WIN32
#include <winsock2.h>
#else
#include <netinet/in.h>
#endif
// internal pcapobject
typedef struct {
PyObject_HEAD
struct timeval ts;
bpf_u_int32 caplen;
bpf_u_int32 len;
} pkthdr;
// Pkthdr_Type
static void
pcap_dealloc(register pkthdr* pp)
{
PyObject_Del(pp);
}
// pcap methods
static PyObject* p_getts(register pkthdr* pp, PyObject* args);
static PyObject* p_getcaplen(register pkthdr* pp, PyObject* args);
static PyObject* p_getlen(register pkthdr* pp, PyObject* args);
static PyMethodDef p_methods[] = {
{"getts", (PyCFunction) p_getts, METH_VARARGS, "get timestamp tuple (seconds, microseconds) since the Epoch"},
{"getcaplen", (PyCFunction) p_getcaplen, METH_VARARGS, "returns the length of portion present"},
{"getlen", (PyCFunction) p_getlen, METH_VARARGS, "returns the length of the packet (off wire)"},
{NULL, NULL} /* sentinel */
};
static PyObject*
pcap_getattr(pkthdr* pp, char* name)
{
return Py_FindMethod(p_methods, (PyObject*)pp, name);
}
PyTypeObject Pkthdr_type = {
PyObject_HEAD_INIT(NULL)
0,
"Pkthdr",
sizeof(pkthdr),
0,
/* methods */
(destructor)pcap_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)pcap_getattr, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
};
PyObject*
new_pcap_pkthdr(const struct pcap_pkthdr* hdr)
{
pkthdr *pp;
pp = PyObject_New(pkthdr, &Pkthdr_type);
if (pp == NULL)
return NULL;
pp->ts = hdr->ts;
pp->caplen = hdr->caplen;
pp->len = hdr->len;
return (PyObject*)pp;
}
static PyObject*
p_getts(register pkthdr* pp, PyObject* args)
{
if (pp->ob_type != &Pkthdr_type) {
PyErr_SetString(PcapError, "Not a pkthdr object");
return NULL;
}
return Py_BuildValue("(ll)", pp->ts.tv_sec, pp->ts.tv_usec);
}
static PyObject*
p_getcaplen(register pkthdr* pp, PyObject* args)
{
if (pp->ob_type != &Pkthdr_type) {
PyErr_SetString(PcapError, "Not a pkthdr object");
return NULL;
}
return Py_BuildValue("l", pp->caplen);
}
static PyObject*
p_getlen(register pkthdr* pp, PyObject* args)
{
if (pp->ob_type != &Pkthdr_type) {
PyErr_SetString(PcapError, "Not a pkthdr object");
return NULL;
}
return Py_BuildValue("l", pp->len);
}
int
pkthdr_to_native(PyObject *pyhdr, struct pcap_pkthdr *hdr)
{
if (pyhdr->ob_type != &Pkthdr_type) {
PyErr_SetString(PcapError, "Not a pkthdr object");
return -1;
}
pkthdr *pp = (pkthdr *) pyhdr;
hdr->ts = pp->ts;
hdr->caplen = pp->caplen;
hdr->len = pp->len;
return 0;
}
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