LEA mDNS v2 (#7540)

* LEAmDNSv2

cores/esp8266/IPAddress.h

@@ -32,6 +32,13 @@
 struct ip_addr: ipv4_addr { };
 #endif // !LWIP_IPV6
 
+// to display a netif id with printf:
+#define NETIFID_STR        "%c%c%u"
+#define NETIFID_VAL(netif) \
+        ((netif)? (netif)->name[0]: '-'),     \
+        ((netif)? (netif)->name[1]: '-'),     \
+        ((netif)? netif_get_index(netif): 42)
+
 // A class to make it easier to handle and pass around IP addresses
 // IPv6 update:
 // IPAddress is now a decorator class for lwIP's ip_addr_t

cores/esp8266/LwipIntf.h

@@ -0,0 +1,26 @@
+
+#ifndef _LWIPINTF_H
+#define _LWIPINTF_H
+
+#include <lwip/netif.h>
+
+#include <functional>
+
+class LwipIntf
+{
+public:
+
+    using CBType = std::function <void(netif*)>;
+
+    static bool stateUpCB (LwipIntf::CBType&& cb);
+
+private:
+
+    LwipIntf () { } // private, cannot be directly allocated
+
+protected:
+
+    static bool stateChangeSysCB (LwipIntf::CBType&& cb);
+};
+
+#endif // _LWIPINTF_H

cores/esp8266/LwipIntfCB.cpp

@@ -0,0 +1,42 @@
+
+#include <LwipIntf.h>
+#include <Schedule.h>
+#include <debug.h>
+
+#define NETIF_STATUS_CB_SIZE 3
+
+static int netifStatusChangeListLength = 0;
+LwipIntf::CBType netifStatusChangeList [NETIF_STATUS_CB_SIZE];
+
+extern "C" void netif_status_changed (struct netif* netif)
+{
+    // override the default empty weak function
+    for (int i = 0; i < netifStatusChangeListLength; i++)
+        netifStatusChangeList[i](netif);
+}
+
+bool LwipIntf::stateChangeSysCB (LwipIntf::CBType&& cb)
+{
+    if (netifStatusChangeListLength >= NETIF_STATUS_CB_SIZE)
+    {
+#if defined(DEBUG_ESP_CORE)
+        DEBUGV("NETIF_STATUS_CB_SIZE is too low\n");
+#endif
+        return false;
+    }
+
+    netifStatusChangeList[netifStatusChangeListLength++] = cb;
+    return true;
+}
+
+bool LwipIntf::stateUpCB (LwipIntf::CBType&& cb)
+{
+    return stateChangeSysCB([cb](netif* nif)
+    {
+        if (netif_is_up(nif))
+            schedule_function([cb, nif]()
+            {
+                cb(nif);
+            });
+    });
+}

cores/esp8266/core_esp8266_noniso.cpp

@@ -117,4 +117,36 @@ char * dtostrf(double number, signed char width, unsigned char prec, char *s) {
     return s;
 }
 
+/*
+    strrstr (static)
+
+    Backwards search for p_pcPattern in p_pcString
+    Based on: https://stackoverflow.com/a/1634398/2778898
+
+*/
+const char* strrstr(const char*__restrict p_pcString,
+                    const char*__restrict p_pcPattern)
+{
+    const char* pcResult = 0;
+
+    size_t      stStringLength = (p_pcString ? strlen(p_pcString) : 0);
+    size_t      stPatternLength = (p_pcPattern ? strlen(p_pcPattern) : 0);
+
+    if ((stStringLength) &&
+            (stPatternLength) &&
+            (stPatternLength <= stStringLength))
+    {
+        // Pattern is shorter or has the same length than the string
+        for (const char* s = (p_pcString + stStringLength - stPatternLength); s >= p_pcString; --s)
+        {
+            if (0 == strncmp(s, p_pcPattern, stPatternLength))
+            {
+                pcResult = s;
+                break;
+            }
+        }
+    }
+    return pcResult;
+}
+
 };

cores/esp8266/stdlib_noniso.h

@@ -44,6 +44,9 @@ char* dtostrf (double val, signed char width, unsigned char prec, char *s);
 
 void reverse(char* begin, char* end);
 
+const char* strrstr(const char*__restrict p_pcString,
+                    const char*__restrict p_pcPattern);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif