It is kind of tcpdump or tshark for barebox. Instead of starting
application it will let barebox dump everything to the console by still
allowing to use other application.
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
commands/Kconfig | 8 +++++
commands/Makefile | 1 +
commands/ethlog.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++
include/net.h | 11 +++++++
net/eth.c | 4 +--
net/net.c | 3 ++
6 files changed, 108 insertions(+), 2 deletions(-)
create mode 100644 commands/ethlog.c
diff --git a/commands/Kconfig b/commands/Kconfig
index caef1e8fb5..c5505321cf 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -1272,6 +1272,14 @@ config CMD_IP_ROUTE_GET
be shown on the command line or alternatively a variable is set to
the result.
+config CMD_ETHLOG
+ tristate
+ prompt "ethlog"
+ help
+ log ethernet traffic.
+
+ Usage: ethlog [-r] [DEVICENAME]
+
# end Network commands
endmenu
diff --git a/commands/Makefile b/commands/Makefile
index fffb6d979e..b3b7bafe6b 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_CMD_MEMCMP) += memcmp.o
obj-$(CONFIG_CMD_MEMCPY) += memcpy.o
obj-$(CONFIG_CMD_MEMSET) += memset.o
obj-$(CONFIG_CMD_EDIT) += edit.o
+obj-$(CONFIG_CMD_ETHLOG) += ethlog.o
obj-$(CONFIG_CMD_EXEC) += exec.o
obj-$(CONFIG_CMD_SLEEP) += sleep.o
obj-$(CONFIG_CMD_SMC) += smc.o
diff --git a/commands/ethlog.c b/commands/ethlog.c
new file mode 100644
index 0000000000..5ae278fc87
--- /dev/null
+++ b/commands/ethlog.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: (c) 2022 Pengutronix,
+// Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
+
+#include <common.h>
+#include <command.h>
+#include <complete.h>
+#include <environment.h>
+#include <getopt.h>
+#include <net.h>
+
+static void ethlog_rx_monitor(struct eth_device *edev, void *packet,
+ int length)
+{
+ print_hex_dump(KERN_DEBUG, "rx data <: ", DUMP_PREFIX_OFFSET,
+ 16, 1, packet, length, true);
+}
+
+static void ethlog_tx_monitor(struct eth_device *edev, void *packet,
+ int length)
+{
+ print_hex_dump(KERN_DEBUG, "tx data >: ", DUMP_PREFIX_OFFSET,
+ 16, 1, packet, length, true);
+}
+
+static int do_ethlog(int argc, char *argv[])
+{
+ struct eth_device *edev;
+ const char *edevname;
+ bool remove = false;
+ int opt;
+
+ while ((opt = getopt(argc, argv, "r")) > 0) {
+ switch (opt) {
+ case 'r':
+ remove = true;
+ break;
+ default:
+ return COMMAND_ERROR_USAGE;
+ }
+ }
+
+ if (optind == argc)
+ edevname = "eth0";
+ else
+ edevname = argv[optind];
+
+ edev = eth_get_byname(edevname);
+ if (!edev) {
+ printf("No such network device: %s\n", edevname);
+ return 1;
+ }
+
+ if (remove) {
+ edev->tx_monitor = NULL;
+ edev->rx_monitor = NULL;
+
+ return 0;
+ }
+
+ if (edev->tx_monitor || edev->rx_monitor) {
+ printf("TX/RX monitor is already registered on %s\n", edevname);
+ return 1;
+ }
+
+ edev->tx_monitor = ethlog_tx_monitor;
+ edev->rx_monitor = ethlog_rx_monitor;
+
+ return 0;
+}
+
+BAREBOX_CMD_HELP_START(ethlog)
+BAREBOX_CMD_HELP_TEXT("Options:")
+BAREBOX_CMD_HELP_OPT("-r", "remove log handler from Ethernet interface")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(ethlog)
+ .cmd = do_ethlog,
+ BAREBOX_CMD_DESC("ETHLOG - tool to get dump of Ethernet packets")
+ BAREBOX_CMD_OPTS("[-r] [device]")
+ BAREBOX_CMD_GROUP(CMD_GRP_NET)
+ BAREBOX_CMD_COMPLETE(eth_complete)
+BAREBOX_CMD_END
diff --git a/include/net.h b/include/net.h
index 8013f79c2e..b50b6e76c8 100644
--- a/include/net.h
+++ b/include/net.h
@@ -46,6 +46,8 @@ struct eth_device {
int (*set_ethaddr) (struct eth_device*, const unsigned char *adr);
int (*rx_preprocessor) (struct eth_device*, unsigned char **packet,
int *length);
+ void (*rx_monitor) (struct eth_device*, void *packet, int length);
+ void (*tx_monitor) (struct eth_device*, void *packet, int length);
struct eth_device *next;
void *priv;
@@ -90,6 +92,15 @@ static inline const char *eth_name(struct eth_device *edev)
return edev->devname;
}
+static inline int eth_send_raw(struct eth_device *edev, void *packet,
+ int length)
+{
+ if (edev->tx_monitor)
+ edev->tx_monitor(edev, packet, length);
+
+ return edev->send(edev, packet, length);
+}
+
int eth_register(struct eth_device* dev); /* Register network device */
void eth_unregister(struct eth_device* dev); /* Unregister network device */
int eth_set_ethaddr(struct eth_device *edev, const char *ethaddr);
diff --git a/net/eth.c b/net/eth.c
index e9e53341f3..bc641dc8e4 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -245,7 +245,7 @@ int eth_send(struct eth_device *edev, void *packet, int length)
led_trigger_network(LED_TRIGGER_NET_TX);
- ret = edev->send(edev, packet, length);
+ ret = eth_send_raw(edev, packet, length);
slice_release(eth_device_slice(edev));
@@ -272,7 +272,7 @@ static void eth_do_work(struct eth_device *edev)
list_for_each_entry_safe(q, tmp, &edev->send_queue, list) {
led_trigger_network(LED_TRIGGER_NET_TX);
- edev->send(edev, q->data, q->length);
+ eth_send_raw(edev, q->data, q->length);
list_del(&q->list);
free(q->data);
free(q);
diff --git a/net/net.c b/net/net.c
index dd2ceb396d..2b0dcb6574 100644
--- a/net/net.c
+++ b/net/net.c
@@ -708,6 +708,9 @@ int net_receive(struct eth_device *edev, unsigned char *pkt, int len)
goto out;
}
+ if (edev->rx_monitor)
+ edev->rx_monitor(edev, pkt, len);
+
if (edev->rx_preprocessor) {
ret = edev->rx_preprocessor(edev, &pkt, &len);
if (ret == -ENOMSG)
--
2.30.2
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