Code to query the IP address data for our WiFi interface.

This allows the microcontroller to query e.g. the IP address of the IoT
device and communicate it to trusted parties.

cmd/cmd.h

@@ -58,6 +58,8 @@ typedef enum {
   CMD_SOCKET_SETUP = 40, // set-up callbacks
   CMD_SOCKET_SEND,       // send data over UDP socket
 
+  CMD_GET_WIFI_INFO = 50,// Query IP address info
+
 } CmdName;
 
 typedef void (*cmdfunc_t)(CmdPacket *cmd);

cmd/handlers.c

@@ -17,6 +17,7 @@
 #ifdef SOCKET
 #include <socket.h>
 #endif
+#include <ip_addr.h>
 
 #ifdef CMD_DBG
 #define DBG(format, ...) do { os_printf(format, ## __VA_ARGS__); } while(0)
@@ -29,6 +30,7 @@ static void cmdSync(CmdPacket *cmd);
 static void cmdWifiStatus(CmdPacket *cmd);
 static void cmdGetTime(CmdPacket *cmd);
 static void cmdAddCallback(CmdPacket *cmd);
+static void cmdGetWifiInfo(CmdPacket *cmd);
 
 // keep track of last status sent to uC so we can notify it when it changes
 static uint8_t lastWifiStatus = wifiIsDisconnected;
@@ -44,6 +46,7 @@ const CmdList commands[] = {
   {CMD_WIFI_STATUS,     "WIFI_STATUS",    cmdWifiStatus},
   {CMD_CB_ADD,          "ADD_CB",         cmdAddCallback},
   {CMD_GET_TIME,        "GET_TIME",       cmdGetTime},
+  {CMD_GET_WIFI_INFO,   "GET_WIFI_INFO",  cmdGetWifiInfo},
 #ifdef MQTT
   {CMD_MQTT_SETUP,      "MQTT_SETUP",     MQTTCMD_Setup},
   {CMD_MQTT_PUBLISH,    "MQTT_PUB",       MQTTCMD_Publish},
@@ -178,6 +181,32 @@ cmdGetTime(CmdPacket *cmd) {
   return;
 }
 
+// Command handler for IP information
+static void ICACHE_FLASH_ATTR
+cmdGetWifiInfo(CmdPacket *cmd) {
+  CmdRequest req;
+
+  cmdRequest(&req, cmd);
+  if(cmd->argc != 0 || cmd->value == 0) {
+    cmdResponseStart(CMD_RESP_V, 0, 0);
+    cmdResponseEnd();
+    return;
+  }
+
+  uint32_t callback = req.cmd->value;
+
+  struct ip_info info;
+  wifi_get_ip_info(0, &info);
+
+  cmdResponseStart(CMD_RESP_CB, callback, 3);
+  cmdResponseBody(&info.ip.addr, sizeof(info.ip.addr));
+  cmdResponseBody(&info.netmask.addr, sizeof(info.netmask.addr));
+  cmdResponseBody(&info.gw.addr, sizeof(info.gw.addr));
+  cmdResponseEnd();
+
+  return;
+}
+
 // Command handler to add a callback to the named-callbacks list, this is for a callback to the uC
 static void ICACHE_FLASH_ATTR
 cmdAddCallback(CmdPacket *cmd) {