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net: introduce packet capture support

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Add support for capturing ethernet packets and storing
them in memory in PCAP(2.4) format, later to be analyzed by
any PCAP viewer software (IE. Wireshark)

This feature greatly assist debugging network issues such
as detecting dropped packets, packet corruption etc.

Signed-off-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Alex Marginean <alexm.osslist@gmail.com>
Tested-by: Alex Marginean <alexm.osslist@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Ramon Fried
2019-07-18 21:43:30 +03:00
committed by Joe Hershberger
parent 1bad991205
commit 3eaac6307d
9 changed files with 316 additions and 1 deletions
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10
net/eth_legacy.c
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@@ -11,6 +11,7 @@
#include <net.h>
#include <phy.h>
#include <linux/errno.h>
#include <net/pcap.h>
#include "eth_internal.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -352,10 +353,17 @@ int eth_is_active(struct eth_device *dev)
int eth_send(void *packet, int length)
{
int ret;
if (!eth_current)
return -ENODEV;
return eth_current->send(eth_current, packet, length);
ret = eth_current->send(eth_current, packet, length);
#if defined(CONFIG_CMD_PCAP)
if (ret >= 0)
pcap_post(packet, lengeth, true);
#endif
return ret;
}
int eth_rx(void)