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netmap_interface.c
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250 lines (218 loc) · 9.05 KB
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/*
* Copyright (C) 2013-2015 Vincenzo Maffione. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "netmap_classes.h"
#include <structmember.h>
static void
NetmapInterface_dealloc(NetmapInterface* self)
{
self->ob_type->tp_free((PyObject*)self);
}
static PyObject *
NetmapInterface_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
NetmapInterface *self;
self = (NetmapInterface *)type->tp_alloc(type, 0);
if (self != NULL) {
self->_nifp = NULL;
}
return (PyObject *)self;
}
static PyObject *
NetmapInterface_repr(NetmapInterface *self)
{
PyObject *result;
struct netmap_if *nifp = self->_nifp;
if (nifp == NULL) {
return Py_BuildValue("s", "Invalid NetmapInterface");
}
result = PyString_FromFormat(
"name: '%s'\n"
"version: %u\n"
"flags: 0x%08x\n"
"tx_rings: %u\n"
"rx_rings: %u\n"
"bufs_head: %u\n"
"spare1[0]: 0x%08x\n"
"spare1[1]: 0x%08x\n"
"spare1[2]: 0x%08x\n"
"spare1[3]: 0x%08x\n"
"spare1[4]: 0x%08x\n",
nifp->ni_name,
nifp->ni_version,
nifp->ni_flags,
nifp->ni_tx_rings,
nifp->ni_rx_rings,
nifp->ni_bufs_head,
nifp->ni_spare1[0],
nifp->ni_spare1[1],
nifp->ni_spare1[2],
nifp->ni_spare1[3],
nifp->ni_spare1[4]
);
return result;
}
static PyMemberDef NetmapInterface_members[] = {
{NULL}
};
int
NetmapInterface_build(NetmapInterface *self, void *addr)
{
self->_nifp = addr;
return 0;
}
void
NetmapInterface_destroy(NetmapInterface *self)
{
self->_nifp = NULL;
}
/*########################## set/get methods #######################*/
static PyObject *
NetmapInterface_name_get(NetmapInterface *self, void *closure)
{
if (!self->_nifp) {
/* This cannot happen for NetmapInterface object created by
a NetmapManager object, but may happen for standalone
NetmapInterface objects. */
Py_RETURN_NONE;
}
return Py_BuildValue("s", self->_nifp->ni_name);
}
static int
NetmapInterface_name_set(NetmapInterface *self, PyObject *value, void *closure)
{
const char *str;
size_t len;
if (!self->_nifp) {
/* See comment in NetmapInterface_name_get(). */
PyErr_SetString(PyExc_TypeError, "Attribute not available");
return -1;
}
str = PyString_AsString(value);
if (str == NULL) {
return -1;
}
len = PyString_Size(value);
if (len > IFNAMSIZ-1) {
len = IFNAMSIZ-1;
}
memcpy(self->_nifp->ni_name, str, len);
self->_nifp->ni_name[len] = '\0';
return 0;
}
#define DEFINE_NETMAP_INTERFACE_U32_GETSET(x) \
static PyObject * \
NetmapInterface_##x##_get(NetmapInterface *self, void *closure) \
{ \
if (!self->_nifp) { \
Py_RETURN_NONE; \
} \
return Py_BuildValue("I", self->_nifp->ni_##x); \
} \
\
static int \
NetmapInterface_##x##_set(NetmapInterface *self, PyObject *value, \
void *closure) \
{ \
long x; \
if (!self->_nifp) { \
PyErr_SetString(PyExc_TypeError, "Attribute not available"); \
return -1; \
} \
x = PyInt_AsLong(value); \
if (x == -1 && PyErr_Occurred()) { \
return -1; \
} \
/* Override the 'const' specifier. */ \
*((uint32_t *)&self->_nifp->ni_##x) = (uint32_t)x; \
return 0; \
}
DEFINE_NETMAP_INTERFACE_U32_GETSET(version);
DEFINE_NETMAP_INTERFACE_U32_GETSET(flags);
DEFINE_NETMAP_INTERFACE_U32_GETSET(tx_rings);
DEFINE_NETMAP_INTERFACE_U32_GETSET(rx_rings);
DEFINE_NETMAP_INTERFACE_U32_GETSET(bufs_head);
#define DECLARE_NETMAP_INTERFACE_U32_GETSETERS(x) \
{#x, \
(getter)NetmapInterface_##x##_get, \
(setter)NetmapInterface_##x##_set, \
"netmap interface " #x " field", \
NULL}
static PyGetSetDef NetmapInterface_getseters[] = {
{"name",
(getter)NetmapInterface_name_get, (setter)NetmapInterface_name_set,
"netmap interface name field",
NULL},
DECLARE_NETMAP_INTERFACE_U32_GETSETERS(version),
DECLARE_NETMAP_INTERFACE_U32_GETSETERS(flags),
DECLARE_NETMAP_INTERFACE_U32_GETSETERS(tx_rings),
DECLARE_NETMAP_INTERFACE_U32_GETSETERS(rx_rings),
DECLARE_NETMAP_INTERFACE_U32_GETSETERS(bufs_head),
{NULL} /* Sentinel */
};
static PyMethodDef NetmapInterface_methods[] = {
{NULL}
};
/* Definition exported to netmap.c. */
PyTypeObject NetmapInterfaceType = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"netmap.NetmapInterface", /*tp_name*/
sizeof(NetmapInterface), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)NetmapInterface_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
(reprfunc)NetmapInterface_repr, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
"Netmap interface object", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
NetmapInterface_methods, /* tp_methods */
NetmapInterface_members, /* tp_members */
NetmapInterface_getseters, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
NetmapInterface_new, /* tp_new */
};