From e20a0719774dfc5231695d0cf2fa7ab55d1b8d6e Mon Sep 17 00:00:00 2001
From: sg <goldsimon@gmx.de>
Date: Fri, 24 Apr 2015 21:23:15 +0200
Subject: [PATCH] added functions dhcp/autoip_supplied_address() to check for
 the source of address assignemnt (replacement for NETIF_FLAG_DHCP)

---
 CHANGELOG                 |  4 ++++
 src/core/dhcp.c           | 18 ++++++++++++++++++
 src/core/ipv4/autoip.c    | 17 +++++++++++++++++
 src/include/lwip/autoip.h |  3 +++
 src/include/lwip/dhcp.h   |  3 +++
 5 files changed, 45 insertions(+)

diff --git a/CHANGELOG b/CHANGELOG
index d166da3f..2b144a65 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -6,6 +6,10 @@ HISTORY
 
   ++ New features:
 
+  2015-04-24: Simon Goldschmidt
+  * dhcp.h/c, autoip.h/.c: added functions dhcp/autoip_supplied_address() to
+    check for the source of address assignemnt (replacement for NETIF_FLAG_DHCP)
+
   2015-04-10: Simon Goldschmidt
   * many files: task #13480: added LWIP_IPV4 define - IPv4 can be disabled,
     leaving an IPv6-only stack
diff --git a/src/core/dhcp.c b/src/core/dhcp.c
index 634ec4ec..aa769791 100644
--- a/src/core/dhcp.c
+++ b/src/core/dhcp.c
@@ -1820,4 +1820,22 @@ dhcp_option_trailer(struct dhcp *dhcp)
   }
 }
 
+/** check if DHCP supplied netif->ip_addr
+ *
+ * @param netif the netif to check
+ * @return 1 if DHCP supplied netif->ip_addr (states BOUND or RENEWING),
+ *         0 otherwise
+ */
+u8_t
+dhcp_supplied_address(struct netif *netif)
+{
+  if ((netif != NULL) && (netif->dhcp != NULL)) {
+    if ((netif->dhcp->state == DHCP_BOUND) ||
+      (netif->dhcp->state == DHCP_RENEWING)) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
 #endif /* LWIP_IPV4 && LWIP_DHCP */
diff --git a/src/core/ipv4/autoip.c b/src/core/ipv4/autoip.c
index 4837df2f..920d67ff 100644
--- a/src/core/ipv4/autoip.c
+++ b/src/core/ipv4/autoip.c
@@ -520,4 +520,21 @@ autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
   }
 }
 
+/** check if AutoIP supplied netif->ip_addr
+ *
+ * @param netif the netif to check
+ * @return 1 if AutoIP supplied netif->ip_addr (state BOUND),
+ *         0 otherwise
+ */
+u8_t
+autoip_supplied_address(struct netif *netif)
+{
+  if ((netif != NULL) && (netif->autoip != NULL)) {
+    if (netif->autoip->state == AUTOIP_STATE_BOUND) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
 #endif /* LWIP_IPV4 && LWIP_AUTOIP */
diff --git a/src/include/lwip/autoip.h b/src/include/lwip/autoip.h
index e405aa22..392622ea 100644
--- a/src/include/lwip/autoip.h
+++ b/src/include/lwip/autoip.h
@@ -112,6 +112,9 @@ void autoip_tmr(void);
 /** Handle a possible change in the network configuration */
 void autoip_network_changed(struct netif *netif);
 
+/** check if AutoIP supplied netif->ip_addr */
+u8_t autoip_supplied_address(struct netif *netif);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/include/lwip/dhcp.h b/src/include/lwip/dhcp.h
index 407868db..c9c0608b 100644
--- a/src/include/lwip/dhcp.h
+++ b/src/include/lwip/dhcp.h
@@ -129,6 +129,9 @@ void dhcp_network_changed(struct netif *netif);
 void dhcp_arp_reply(struct netif *netif, const ip4_addr_t *addr);
 #endif
 
+/** check if DHCP supplied netif->ip_addr */
+u8_t dhcp_supplied_address(struct netif *netif);
+
 /** to be called every minute */
 void dhcp_coarse_tmr(void);
 /** to be called every half second */