net: Filter incoming netconsole packets by IP

Check the incoming packets' source IP address... if ncip isn't set to a
broadcast address, only listen to the client at ncip.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/include/net.h b/include/net.h
index e193b7b..3539336 100644
--- a/include/net.h
+++ b/include/net.h
@@ -549,7 +549,8 @@
 
 #ifdef CONFIG_NETCONSOLE
 void NcStart(void);
-int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
+int nc_input_packet(uchar *pkt, IPaddr_t src_ip, unsigned dest_port,
+	unsigned src_port, unsigned len);
 #endif
 
 static inline __attribute__((always_inline)) int eth_is_on_demand_init(void)