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/* 1617, Sat 10 May 14 (NZST)
natkit.c: RubyLibtrace, python version!
python-libtrace: a Python module to make it easy to use libtrace
Copyright (C) 2015 by Nevil Brownlee, U Auckland | WAND
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <Python.h>
#include "structmember.h"
#include "libtrace.h"
#include "../plt/plt.h"
typedef struct { /* Python stuff starts here */
PyObject_HEAD
int version; /* 4 or 6 */
struct {
int proto;
uint16_t sport, dport;
union {
struct {
uint8_t saddr[16], daddr[16];
} v4;
struct {
uint8_t saddr[16], daddr[16];
} v6;
}
} fkey;
} IPflowObject;
static void IPflow_dealloc(PyObject *self) {
self->ob_type->tp_free((PyObject *)self);
}
static PyObject *IPflow_new(PyTypeObject *type, PyObject *args) {
IPflowObject *self = (IPflowObject *)type->tp_alloc(type, 0);
return (PyObject *)self;
}
static int IPflow_init(IPflowObject *type, PyObject *args) {
DataObject *dp = NULL;
if (!PyArg_ParseTuple(args, "O:IPflow", &dp)) {
PyErr_SetString(PyExc_ValueError, "Expected an object");
return -1;
}
if (!PyObject_IsInstance((PyObject *)dp, (PyObject *)&PacketType)) {
PyErr_SetString(PyExc_SystemError, "Expected a Data object");
return -1;
}
if (dp->kind != RLT_KIND_PKT) {
PyErr_SetString(PyExc_ValueError,
"Object didn't come from a plt Packet"); return -1;
}
uint16_t ethertype; uint32_t remaining = dp->l2_rem;
void *l3p = trace_get_payload_from_layer2(
dp->l2p, dp->linktype, ðertype, &remaining);
if (l3p) {
uint8_t proto, *trans;
trans = (uint8_t *)trace_get_transport(dp->data, &proto, &remaining);
if (trans) {
return 0; /* Initialised OK */
}
}
PyErr_SetString(PyExc_ValueError,
"Couldn't get Layer3 data");
return 0;
}
static PyObject *IPflow_get_dummy(DataObject *self) {
PyObject *result = PyInt_FromLong((long)0);
if (result == NULL) return NULL;
return result;
}
set_read_only(dummy);
static PyGetSetDef Packet_getseters[] = {
{"dummy",
(getter)IPflow_get_dummy, (setter)set_dummy,
"IPflow dummy", NULL},
{NULL}, /* Sentinel */
};
static PyObject *IPflow_reverse_key(DataObject *self) {
PyObject *result = PyInt_FromLong((long)0);
if (result == NULL) return NULL;
return result;
}
static PyMethodDef IPflow_methods[] = {
{"reverse_key", (PyCFunction)IPflow_reverse_key, METH_VARARGS,
"Swap source and destination files on an IPflow"},
{NULL} /* Sentinel */
};
PyTypeObject IPflowType = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"IPflow", /*tp_name*/
sizeof(DataObject), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)IPflow_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
// (reprfunc)plt_str, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro (setattr works, this doesn't) */
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
"Python-libtrace IPflow", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
IPflow_methods, /* tp_methods */
0, /* tp_members */
Packet_getseters, /* tp_getset */
&DataType, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)IPflow_init, /* tp_init */
0, /* tp_alloc */
(newfunc)IPflow_new, /* tp_new */
};
void initipflow(void) {
if (PyType_Ready(&IPflowType) < 0) return;
Py_TYPE(&IPflowType) = &PyType_Type;
Py_INCREF(&IPflowType);
PyModule_AddObject(plt_module, "IPflow", (PyObject *)&IPflowType);
}
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