This is needed to test the netretry functionality (make the command fail
on a sandbox eth device).

Signed-off-by: Joe Hershberger <joe.hershber...@ni.com>

---

Changes in v4:
-Add ability to disable ping reply in sandbox eth driver

Changes in v3: None
Changes in v2: None

 drivers/net/sandbox.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/sandbox.c b/drivers/net/sandbox.c
index 81362e6..28fe09a 100644
--- a/drivers/net/sandbox.c
+++ b/drivers/net/sandbox.c
@@ -49,9 +49,14 @@ static int sb_eth_send(struct udevice *dev, void *packet, 
int length)
 {
        struct eth_sandbox_priv *priv = dev_get_priv(dev);
        struct ethernet_hdr *eth = packet;
+       char varname[32];
 
        debug("eth_sandbox: Send packet %d\n", length);
 
+       sprintf(varname, "eth_sandbox_disable_%d", dev->seq);
+       if (getenv_yesno(varname) > 0)
+               return 0;
+
        if (ntohs(eth->et_protlen) == PROT_ARP) {
                struct arp_hdr *arp = packet + ETHER_HDR_SIZE;
 
-- 
1.7.11.5

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