Added debug interface for network monitors.

2026-09-23 02:23:47 +08:00 · 2006-05-11 13:29:06 +00:00
parent c79792a985
commit 6a12d7f440
6 changed files with 256 additions and 7 deletions
@@ -0,0 +1,179 @@
+/******************************************************************************
+ *
+ *  $Id$
+ *
+ *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH
+ *
+ *  This file is part of the IgH EtherCAT Master.
+ *
+ *  The IgH EtherCAT Master 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; version 2 of the License.
+ *
+ *  The IgH EtherCAT Master 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 the IgH EtherCAT Master; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *****************************************************************************/
+
+/**
+   \file
+   Ethernet interface for debugging purposes.
+*/
+
+/*****************************************************************************/
+
+#include <linux/etherdevice.h>
+
+#include "globals.h"
+#include "debug.h"
+
+/*****************************************************************************/
+
+// net_device functions
+int ec_dbgdev_open(struct net_device *);
+int ec_dbgdev_stop(struct net_device *);
+struct net_device_stats *ec_dbgdev_stats(struct net_device *);
+
+/*****************************************************************************/
+
+/**
+   Debug constructor.
+   Initializes the debug object, creates a net_device and registeres it.
+*/
+
+int ec_debug_init(ec_debug_t *dbg /**< debug object */)
+{
+    int result;
+
+    dbg->opened = 0;
+    memset(&dbg->stats, 0, sizeof(struct net_device_stats));
+
+    if (!(dbg->dev =
+          alloc_netdev(sizeof(ec_debug_t *), "ec%d", ether_setup))) {
+        EC_ERR("Unable to allocate net_device for debug object!\n");
+        goto out_return;
+    }
+
+    // initialize net_device
+    dbg->dev->open = ec_dbgdev_open;
+    dbg->dev->stop = ec_dbgdev_stop;
+    dbg->dev->get_stats = ec_dbgdev_stats;
+
+    // initialize private data
+    *((ec_debug_t **) netdev_priv(dbg->dev)) = dbg;
+
+    // connect the net_device to the kernel
+    if ((result = register_netdev(dbg->dev))) {
+        EC_ERR("Unable to register net_device: error %i\n", result);
+        goto out_free;
+    }
+
+    return 0;
+
+ out_free:
+    free_netdev(dbg->dev);
+    dbg->dev = NULL;
+ out_return:
+    return -1;
+}
+
+/*****************************************************************************/
+
+/**
+   Debug destructor.
+   Unregisteres the net_device and frees allocated memory.
+*/
+
+void ec_debug_clear(ec_debug_t *dbg /**< debug object */)
+{
+    if (dbg->dev) {
+        unregister_netdev(dbg->dev);
+        free_netdev(dbg->dev);
+    }
+}
+
+/*****************************************************************************/
+
+/**
+   Sends frame data to the interface.
+*/
+
+void ec_debug_send(ec_debug_t *dbg, /**< debug object */
+                   const uint8_t *data, /**< frame data */
+                   size_t size /**< size of the frame data */
+                   )
+{
+    struct sk_buff *skb;
+
+    if (!dbg->opened) return;
+
+    // allocate socket buffer
+    if (!(skb = dev_alloc_skb(size))) {
+        dbg->stats.rx_dropped++;
+        return;
+    }
+
+    // copy frame contents into socket buffer
+    memcpy(skb_put(skb, size), data, size);
+
+    // update device statistics
+    dbg->stats.rx_packets++;
+    dbg->stats.rx_bytes += size;
+
+    // pass socket buffer to network stack
+    skb->dev = dbg->dev;
+    skb->protocol = eth_type_trans(skb, dbg->dev);
+    skb->ip_summed = CHECKSUM_UNNECESSARY;
+    netif_rx(skb);
+}
+
+/******************************************************************************
+ *  NET_DEVICE functions
+ *****************************************************************************/
+
+/**
+   Opens the virtual network device.
+*/
+
+int ec_dbgdev_open(struct net_device *dev /**< debug net_device */)
+{
+    ec_debug_t *dbg = *((ec_debug_t **) netdev_priv(dev));
+    dbg->opened = 1;
+    EC_INFO("debug interface %s opened.\n", dev->name);
+    return 0;
+}
+
+/*****************************************************************************/
+
+/**
+   Stops the virtual network device.
+*/
+
+int ec_dbgdev_stop(struct net_device *dev /**< debug net_device */)
+{
+    ec_debug_t *dbg = *((ec_debug_t **) netdev_priv(dev));
+    dbg->opened = 0;
+    EC_INFO("debug interface %s stopped.\n", dev->name);
+    return 0;
+}
+
+/*****************************************************************************/
+
+/**
+   Gets statistics about the virtual network device.
+*/
+
+struct net_device_stats *ec_dbgdev_stats(struct net_device *dev
+                                         /**< debug net_device */)
+{
+    ec_debug_t *dbg = *((ec_debug_t **) netdev_priv(dev));
+    return &dbg->stats;
+}
+
+/*****************************************************************************/