Translated partially

ESP8266NetBIOS.cpp

@@ -1,4 +1,5 @@
-/* Klient sluzby NBNS
+/* NBNS service client
+  Pavel Brychta pablo@xpablo.cz
  */
 
 #include "ESP8266NetBIOS.h"
@@ -24,65 +25,65 @@ extern "C" {
 #define LWIP_PLATFORM_HTONL(_n)  ((u32_t)( (((_n) & 0xff) << 24) | (((_n) & 0xff00) << 8) | (((_n) >> 8)  & 0xff00) | (((_n) >> 24) & 0xff) ))
 #endif
 
-// Definice struktury NBNS dotazu (alespon veci, ktere jsem vypozoroval):
+// NBNS query structure (at least things that I've discovered):
 struct NBNSQUESTION {
-    uint16_t NBNSQ_ID; // ID dotazu
+    uint16_t NBNSQ_ID; // query ID
     uint8_t NBNSQ_FLAGS1;
     uint8_t NBNSQ_FLAGS2;
     uint16_t NBNSQ_QUESTIONCOUNT;
     uint16_t NBNSQ_ANSWERCOUNT;
     uint16_t NBNSQ_AUTHORITYCOUNT;
     uint16_t NBNSQ_ADDITIONALRECORDCOUNT;
-    uint8_t NBNSQ_NAMESIZE; // delka nasledujiciho retezce
+    uint8_t NBNSQ_NAMESIZE; // following string length
-    char NBNSQ_NAME[32+1]; // POZOR!!! mozna tato polozka muze byt ruzne dlouha
+    char NBNSQ_NAME[32+1]; // CAUTION!!! maybe this entry is not of constant length
     uint16_t NBNSQ_TYPE;
     uint16_t NBNSQ_CLASS;
 } __attribute__((packed));
 
-// Definice struktury NBNS odpovedi (stejne jako u dotazu)
+// NBNS response structure (again at least things that I've discovered)
 struct NBNSANSWER {
-    uint16_t NBNSA_ID; // ID dotazu
+    uint16_t NBNSA_ID; // query ID
     uint8_t NBNSA_FLAGS1;
     uint8_t NBNSA_FLAGS2;
     uint16_t NBNSA_QUESTIONCOUNT;
     uint16_t NBNSA_ANSWERCOUNT;
     uint16_t NBNSA_AUTHORITYCOUNT;
     uint16_t NBNSA_ADDITIONALRECORDCOUNT;
-    uint8_t NBNSA_NAMESIZE; // delka nasledujiciho retezce
+    uint8_t NBNSA_NAMESIZE; // length of the following string
-    char NBNSA_NAME[32 + 1]; // POZOR!!! mozna tato polozka muze byt ruzne dlouha
+    char NBNSA_NAME[32 + 1]; // CAUTION!!! maybe this entry is not of constant length
     uint16_t NBNSA_TYPE;
     uint16_t NBNSA_CLASS;
     uint32_t NBNSA_TIMETOLIVE;
     uint16_t NBNSA_LENGTH;
-    uint16_t NBNSA_NODEFLAGS; // POZOR!!! tady si nejsem moc jisty
+    uint16_t NBNSA_NODEFLAGS; // CAUTION!!! I'm really not sure about this
     uint32_t NBNSA_NODEADDRESS;
 } __attribute__((packed));
 
-// Definice struktury NBNS odpovedi na dotaz na jmeno
+// structure of NBNS response to name query
 struct NBNSANSWERN {
-    uint16_t NBNSAN_ID; // ID dotazu
+    uint16_t NBNSAN_ID; // query ID
     uint8_t NBNSAN_FLAGS1;
     uint8_t NBNSAN_FLAGS2;
     uint16_t NBNSAN_QUESTIONCOUNT;
     uint16_t NBNSAN_ANSWERCOUNT;
     uint16_t NBNSAN_AUTHORITYCOUNT;
     uint16_t NBNSAN_ADDITIONALRECORDCOUNT;
-    uint8_t NBNSAN_NAMESIZE; // delka nasledujiciho retezce
+    uint8_t NBNSAN_NAMESIZE; // length of the following string
-    char NBNSAN_NAME[32 + 1]; // POZOR!!! mozna tato polozka muze byt ruzne dlouha
+    char NBNSAN_NAME[32 + 1]; // CAUTION!!! maybe this entry is not of constant length
     uint16_t NBNSAN_TYPE;
     uint16_t NBNSAN_CLASS;
     uint32_t NBNSAN_TIMETOLIVE;
     uint16_t NBNSAN_LENGTH;
     uint8_t NBNSAN_NUMBER; // number of names
-    char NBNSAN_NNAME[15]; // jmeno nodu
+    char NBNSAN_NNAME[15]; // node name
-    uint8_t NBNSAN_NTYPE; // typ jmena
+    uint8_t NBNSAN_NTYPE; // type of name
     uint16_t NBNSAN_NFLAGS; // node flags
 } __attribute__((packed));
 
-/** Metoda pro ziskani jmena z kodovani NETBIOS.
+/** Method to get NETBIOS name encoding.
- *	\param nbname Ukazatel na jmeno v NETBIOS kodovani.
+ *	\param nbname Pointer to NETBIOS encoded name.
- *	\param name Ukazatel na misto, kam prevadime jmeno.
+ *	\param name Pointer where to decode the name.
- *	\param maxlen Maximalni pocet znaku v nbname.
+ *	\param maxlen Maximum of characters allowed in the nbname.
  */
 void ESP8266NetBIOS::_getnbname(char *nbname, char *name, uint8_t maxlen)
 {
@@ -90,15 +91,15 @@ void ESP8266NetBIOS::_getnbname(char *nbname, char *name, uint8_t maxlen)
     uint8_t c = 0;
 
     while ((*nbname != 0x0) && (c < maxlen)) {
-        b = (*nbname++ - 'A') << 4; // opravime nibble a prevedeme ho do vyssich bitu
+        b = (*nbname++ - 'A') << 4; // correct the nibble and move it to upper bits
-        c++; // pocitame pocet odebranych bytu
+        c++; // removed byte counter
         if (*nbname != 0x0) {
-            b |= *nbname++ - 'A'; // pridame nizsi nibble
+            b |= *nbname++ - 'A'; // add lower nibble
-            c++; // opet spocitame pocet odebranych znaku
+            c++; // again removed byte counter
         }
-        *name++ = b; // ulozime znak do vysledku a posuneme ukazatel
+        *name++ = b; // store decoded character and bump pointer
     }
-    *name = 0x0; // ulozime ukoncovaci 0
+    *name = 0x0; // store trailing zero (made C character string)
 }
 
 /** Prevod zadaneho textu do NETBIOS kodovani
@@ -174,7 +175,7 @@ void ESP8266NetBIOS::end()
     }
 }
 
-#if LWIP_VERSION_MAJOR == 1 
+#if LWIP_VERSION_MAJOR == 1
 void ESP8266NetBIOS::_recv(udp_pcb *upcb, pbuf *pb, ip_addr_t *addr, uint16_t port)
 #else
 void ESP8266NetBIOS::_recv(udp_pcb *upcb, pbuf *pb, const ip_addr_t *addr, uint16_t port)

examples/ESP_NBNST/ESP_NBNST.ino

@@ -6,14 +6,11 @@ const char* ssid = "............";
 const char* password = "..............";
 
 ESP8266WebServer wwwserver(80);
-String content;
+const char PAGE[] PROGMEM = "<!DOCTYPE HTML>\n<html>Hello world from ESP8266<p></html>"
 
 static void handleRoot(void) {
-  content = F("<!DOCTYPE HTML>\n<html>Hello world from ESP8266");
-  content += F("<p>");
-  content += F("</html>");
 
-  wwwserver.send(200, F("text/html"), content);
+  wwwserver.send_P(200, F("text/html"), PAGE);
 }
 
 void setup() {