From d9f1ecece2f86d3c007ec51853ec499f1aebb21b Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Fri, 1 Jun 2018 13:33:14 +1000
Subject: [PATCH] stm32/modnetwork: Provide generic implementation of ifconfig
 method.

All it needs is a lwIP netif to function.
---
 ports/stm32/modnetwork.c | 57 ++++++++++++++++++++++++++++++++++++++++
 ports/stm32/modnetwork.h |  2 ++
 2 files changed, 59 insertions(+)

diff --git a/ports/stm32/modnetwork.c b/ports/stm32/modnetwork.c
index 42052e3c71..416a31f6a9 100644
--- a/ports/stm32/modnetwork.c
+++ b/ports/stm32/modnetwork.c
@@ -31,6 +31,7 @@
 #include "py/objlist.h"
 #include "py/runtime.h"
 #include "py/mphal.h"
+#include "lib/netutils/netutils.h"
 #include "modnetwork.h"
 
 #if MICROPY_PY_NETWORK
@@ -39,6 +40,8 @@
 
 #include "lwip/netif.h"
 #include "lwip/timeouts.h"
+#include "lwip/dns.h"
+#include "lwip/dhcp.h"
 
 u32_t sys_now(void) {
     return mp_hal_ticks_ms();
@@ -117,4 +120,58 @@ const mp_obj_module_t mp_module_network = {
     .globals = (mp_obj_dict_t*)&mp_module_network_globals,
 };
 
+/*******************************************************************************/
+// Implementations of network methods that can be used by any interface
+
+#if MICROPY_PY_LWIP
+
+mp_obj_t mod_network_nic_ifconfig(struct netif *netif, size_t n_args, const mp_obj_t *args) {
+    if (n_args == 0) {
+        // Get IP addresses
+        const ip_addr_t *dns = dns_getserver(0);
+        mp_obj_t tuple[4] = {
+            netutils_format_ipv4_addr((uint8_t*)&netif->ip_addr, NETUTILS_BIG),
+            netutils_format_ipv4_addr((uint8_t*)&netif->netmask, NETUTILS_BIG),
+            netutils_format_ipv4_addr((uint8_t*)&netif->gw, NETUTILS_BIG),
+            netutils_format_ipv4_addr((uint8_t*)&dns, NETUTILS_BIG),
+        };
+        return mp_obj_new_tuple(4, tuple);
+    } else if (args[1] == MP_OBJ_NEW_QSTR(MP_QSTR_dhcp)) {
+        // Start the DHCP client
+        if (dhcp_supplied_address(netif)) {
+            dhcp_renew(netif);
+        } else {
+            dhcp_stop(netif);
+            dhcp_start(netif);
+        }
+
+        // Wait for DHCP to get IP address
+        uint32_t start = mp_hal_ticks_ms();
+        while (!dhcp_supplied_address(netif)) {
+            if (mp_hal_ticks_ms() - start > 10000) {
+                mp_raise_msg(&mp_type_OSError, "timeout waiting for DHCP to get IP address");
+            }
+            mp_hal_delay_ms(100);
+        }
+
+        return mp_const_none;
+    } else {
+        // Release and stop any existing DHCP
+        dhcp_release(netif);
+        dhcp_stop(netif);
+        // Set static IP addresses
+        mp_obj_t *items;
+        mp_obj_get_array_fixed_n(args[1], 4, &items);
+        netutils_parse_ipv4_addr(items[0], (uint8_t*)&netif->ip_addr, NETUTILS_BIG);
+        netutils_parse_ipv4_addr(items[1], (uint8_t*)&netif->netmask, NETUTILS_BIG);
+        netutils_parse_ipv4_addr(items[2], (uint8_t*)&netif->gw, NETUTILS_BIG);
+        ip_addr_t dns;
+        netutils_parse_ipv4_addr(items[3], (uint8_t*)&dns, NETUTILS_BIG);
+        dns_setserver(0, &dns);
+        return mp_const_none;
+    }
+}
+
+#endif
+
 #endif  // MICROPY_PY_NETWORK
diff --git a/ports/stm32/modnetwork.h b/ports/stm32/modnetwork.h
index fa706d8697..3224d785e6 100644
--- a/ports/stm32/modnetwork.h
+++ b/ports/stm32/modnetwork.h
@@ -44,6 +44,8 @@ typedef struct _mod_network_nic_type_t {
     void (*poll_callback)(void *data, struct netif *netif);
 } mod_network_nic_type_t;
 
+mp_obj_t mod_network_nic_ifconfig(struct netif *netif, size_t n_args, const mp_obj_t *args);
+
 #else
 
 struct _mod_network_socket_obj_t;