From: Joan Lledó <[email protected]>
---
lwip/iioctl-ops.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/lwip/iioctl-ops.c b/lwip/iioctl-ops.c
index fcdca865..bfc0ccc2 100644
--- a/lwip/iioctl-ops.c
+++ b/lwip/iioctl-ops.c
@@ -170,6 +170,19 @@ siocsifXaddr (struct sock_user *user,
return err;
}
+static void
+clear_gateways (void *arg)
+{
+ struct netif *netif;
+ struct ip4_addr gw;
+
+ gw.addr = INADDR_NONE;
+ NETIF_FOREACH (netif)
+ {
+ netif_set_gw (netif, &gw);
+ }
+}
+
static void
set_default_if (void *arg)
{
@@ -255,6 +268,14 @@ lwip_S_rioctl_siocaddrt (struct sock_user *user,
(ipv4_addrs[ADDR] & ipv4_addrs[NETMASK]))
return EHOSTUNREACH;
+ /*
+ * Since we only allow setting a gateway when it will become the default
gateway,
+ * any existing gateway must have been previously set as the default.
However, there
+ * can only be one default gateway at a time, so we must clear any
existing gateways
+ * before setting the new one.
+ */
+ tcpip_callback (clear_gateways, NULL);
+
ipv4_addrs[GWADDR] = route.rt_gateway;
tcpip_callback (set_default_if, netif);
}
--
2.50.1
