Remove CONFIG_NET_PINGADDRCONF. This was a uIP way of assigning IP addresses, but is not standard and not a appropriate feature in general.

ChangeLog

@@ -11186,3 +11186,6 @@
 	  (2015-11-30).
 	* configs/same70-xplained/netnsh:  Added and verified a network-enabled
 	  NSH configuration for the SAME70-Xplained board (2015-11-20).
+	* net/: Remove CONFIG_NET_PINGADDRCONF.  This was a uIP way of assigning
+	  IP addresses, but is not standard and not a appropriate feature in
+	  general (2015-12-01).

net/devif/ipv4_input.c

@@ -398,35 +398,16 @@ int ipv4_input(FAR struct net_driver_s *dev)
       return udp_ipv4_input(dev);
     }
 
-  /* In most other cases, the device must be assigned a non-zero IP
+  /* In other cases, the device must be assigned a non-zero IP address. */
-   * address.  Another exception is when CONFIG_NET_PINGADDRCONF is
-   * enabled...
-   */
 
   else
 #endif
 #ifdef CONFIG_NET_ICMP
   if (net_ipv4addr_cmp(dev->d_ipaddr, INADDR_ANY))
     {
-#ifdef CONFIG_NET_PINGADDRCONF
-      /* If we are configured to use ping IP address configuration and
-       * hasn't been assigned an IP address yet, we accept all ICMP
-       * packets.
-       */
-
-      if (pbuf->proto == IP_PROTO_ICMP)
-        {
-          nlldbg("Possible ping config packet received\n");
-          icmp_input(dev);
-          goto drop;
-        }
-      else
-#endif
-        {
       nlldbg("No IP address assigned\n");
       goto drop;
     }
-    }
 
   /* Check if the packet is destined for out IP address */
   else

net/devif/ipv6_input.c

@@ -204,10 +204,7 @@ int ipv6_input(FAR struct net_driver_s *dev)
       return udp_ipv6_input(dev);
     }
 
-  /* In most other cases, the device must be assigned a non-zero IP
+  /* In other cases, the device must be assigned a non-zero IP address. */
-   * address.  Another exception is when CONFIG_NET_PINGADDRCONF is
-   * enabled...
-   */
 
   else
 #endif

net/icmp/Kconfig

@@ -18,15 +18,14 @@ if NET_ICMP
 config NET_ICMP_PING
 	bool "ICMP ping interfaces"
 	default n
+	depends on BUILD_FLAT
 	---help---
 		Provide interfaces to support application level support for
 		for sending ECHO (ping) requests and associating ECHO replies.
 
-config NET_PINGADDRCONF
+		NOTE: Calling these interfaces from application space is a
-	bool "Ping address configuration"
+		violation of the OS/application interface but for historical
-	default n
+		reasons, is permitted in the flat build.
-	---help---
-		Use "ping" packet for setting IP address
 
 endif # NET_ICMP
 endmenu # ICMP Networking Support

net/icmp/icmp_input.c

@@ -117,18 +117,6 @@ void icmp_input(FAR struct net_driver_s *dev)
 
   if (picmp->type == ICMP_ECHO_REQUEST)
     {
-      /* If we are configured to use ping IP address assignment, we use
-       * the destination IP address of this ping packet and assign it to
-       * ourself.
-       */
-
-#ifdef CONFIG_NET_PINGADDRCONF
-      if (dev->d_ipaddr == 0)
-        {
-          dev->d_ipaddr = picmp->destipaddr;
-        }
-#endif
-
       /* Change the ICMP type */
 
       picmp->type = ICMP_ECHO_REPLY;

net/icmpv6/Kconfig

@@ -19,10 +19,15 @@ if NET_ICMPv6
 config NET_ICMPv6_PING
 	bool "ICMPv6 ping interfaces"
 	default n
+	depends on BUILD_FLAT
 	---help---
 		Provide interfaces to support application level support for
 		for sending ECHO (ping) requests and associating ECHO replies.
 
+		NOTE: Calling these interfaces from application space is a
+		violation of the OS/application interface but for historical
+		reasons, is permitted in the flat build.
+
 config NET_ICMPv6_NEIGHBOR
 	bool "Solicit destination addresses"
 	default n