net: add promiscuous mode configuration support

This configuration is mostly needed for controllers attached to switches
with different MAC address configurations or for debugging networking
issues.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.barebox.org/20221108061009.4168735-1-o.rempel@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 11 insertions, 0 deletions

diff --git a/include/net.h b/include/net.h
index 338033d698..f9d1fbfc18 100644
--- a/include/net.h
+++ b/include/net.h
@@ -49,6 +49,8 @@ struct eth_device {
 				 int *length);
 	void (*rx_monitor) (struct eth_device*, void *packet, int length);
 	void (*tx_monitor) (struct eth_device*, void *packet, int length);
+	/* Set promiscuous mode */
+	int  (*set_promisc) (struct eth_device*, bool enable);
 
 	struct eth_device *next;
 	void *priv;
@@ -113,6 +115,7 @@ int eth_send(struct eth_device *edev, void *packet, int length);	   /* Send a pa
 int eth_rx(void);			/* Check for received packets	*/
 void eth_open_all(void);
 struct eth_device *of_find_eth_device_by_node(struct device_node *np);
+int eth_set_promisc(struct eth_device *edev, bool enable);
 
 /* associate a MAC address to a ethernet device. Should be called by
  * board code for boards which store their MAC address at some unusual
diff --git a/net/eth.c b/net/eth.c
index 8f6ff7db3a..19654cdd51 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -31,6 +31,14 @@ struct eth_ethaddr {
 
 static LIST_HEAD(ethaddr_list);
 
+int eth_set_promisc(struct eth_device *edev, bool enable)
+{
+	if (!edev->set_promisc)
+		return -EOPNOTSUPP;
+
+	return edev->set_promisc(edev, enable);
+}
+
 int eth_set_ethaddr(struct eth_device *edev, const char *ethaddr)
 {
 	int ret;