Suppress network configuration in discover example if it is an NSH built-in functin

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@5139 7fd9a85b-ad96-42d3-883c-3090e2eb8679

apps/examples/discover/Kconfig

@@ -17,29 +17,29 @@ config EXAMPLE_DISCOVER
 		It is also possible to address all classes with a kind of broadcast
 		discover.
 
-if EXAMPLE_DISCOVER
-
 config EXAMPLE_DISCOVER_DHCPC
 	bool "DHCP Client"
 	default n
+	depends on EXAMPLE_DISCOVER && !NSH_BUILTIN_APPS
 	select NETUTILS_DHCPC
 	select NETUTILS_RESOLV
 
 config EXAMPLE_DISCOVER_NOMAC
-	bool "Use canned MAC address"
+	bool "Use Canned MAC Address"
 	default n
+	depends on EXAMPLE_DISCOVER && !NSH_BUILTIN_APPS
 
 config EXAMPLE_DISCOVER_IPADDR
 	hex "Target IP address"
 	default 0x0a000002
-	depends on !EXAMPLE_DISCOVER_DHCPC
+	depends on EXAMPLE_DISCOVER && !NSH_BUILTIN_APPS && !EXAMPLE_DISCOVER_DHCPC
 
 config EXAMPLE_DISCOVER_DRIPADDR
-	hex "Router IP address"
+	hex "Default Router IP address (Gateway)"
 	default 0x0a000001
+	depends on EXAMPLE_DISCOVER && !NSH_BUILTIN_APPS
 
 config EXAMPLE_DISCOVER_NETMASK
 	hex "Network Mask"
 	default 0xffffff00
-
-endif
+	depends on EXAMPLE_DISCOVER && !NSH_BUILTIN_APPS

apps/examples/discover/main.c

@@ -87,6 +87,11 @@
 
 int discover_main(int argc, char *argv[])
 {
+  /* If this task is excecutated as an NSH built-in function, then the
+   * network has already been configured by NSH's start-up logic.
+   */
+
+#ifndef CONFIG_NSH_BUILTIN_APPS
   struct in_addr addr;
 #if defined(CONFIG_EXAMPLE_DISCOVER_DHCPC) || defined(CONFIG_EXAMPLE_DISCOVER_NOMAC)
   uint8_t mac[IFHWADDRLEN];
@@ -168,7 +173,9 @@ int discover_main(int argc, char *argv[])
       dhcpc_close(handle);
       printf("IP: %s\n", inet_ntoa(ds.ipaddr));
     }
-#endif
+
+#endif /* CONFIG_EXAMPLE_DISCOVER_DHCPC */
+#endif /* CONFIG_NSH_BUILTIN_APPS */
 
   if (discover_start() < 0)
     {