Adding IPv6 Support for Arduino 3.0.0

cores/esp32/IPAddress.cpp

@@ -20,68 +20,86 @@
 #include <Arduino.h>
 #include <IPAddress.h>
 #include <Print.h>
+#include <StreamString.h>
 
-IPAddress::IPAddress()
-{
-    _address.dword = 0;
+IPAddress::IPAddress() {
+#if LWIP_IPV6
+  _ip = *IP6_ADDR_ANY;
+#else
+  _ip = *IP_ADDR_ANY;
+#endif
 }
 
-IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet)
+IPAddress::IPAddress(const IPAddress& from)
 {
-    _address.bytes[0] = first_octet;
-    _address.bytes[1] = second_octet;
-    _address.bytes[2] = third_octet;
-    _address.bytes[3] = fourth_octet;
+    ip_addr_copy(_ip, from._ip);
 }
 
-IPAddress::IPAddress(uint32_t address)
-{
-    _address.dword = address;
+IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet) {
+    uint8_t addr[] {
+        first_octet,
+        second_octet,
+        third_octet,
+        fourth_octet,
+    };
+    *this = &addr[0];
 }
 
-IPAddress::IPAddress(const uint8_t *address)
-{
-    memcpy(_address.bytes, address, sizeof(_address.bytes));
+IPAddress::IPAddress(uint8_t o1, uint8_t o2, uint8_t o3, uint8_t o4, uint8_t o5, uint8_t o6, uint8_t o7, uint8_t o8, uint8_t o9, uint8_t o10, uint8_t o11, uint8_t o12, uint8_t o13, uint8_t o14, uint8_t o15, uint8_t o16) {
+    setV6();
+    (*this)[0] = o1;
+    (*this)[1] = o2;
+    (*this)[2] = o3;
+    (*this)[3] = o4;
+    (*this)[4] = o5;
+    (*this)[5] = o6;
+    (*this)[6] = o7;
+    (*this)[7] = o8;
+    (*this)[8] = o9;
+    (*this)[9] = o10;
+    (*this)[10] = o11;
+    (*this)[11] = o12;
+    (*this)[12] = o13;
+    (*this)[13] = o14;
+    (*this)[14] = o15;
+    (*this)[15] = o16;
 }
 
-IPAddress& IPAddress::operator=(const uint8_t *address)
-{
-    memcpy(_address.bytes, address, sizeof(_address.bytes));
-    return *this;
+IPAddress::IPAddress(IPType type, const uint8_t *address) {
+    IPAddress(type, address, 0);
 }
 
-IPAddress& IPAddress::operator=(uint32_t address)
-{
-    _address.dword = address;
-    return *this;
-}
+IPAddress::IPAddress(IPType type, const uint8_t *address, uint8_t zone) {
+    if (type == IPv4) {
+        setV4();
+        memcpy(&this->_ip.u_addr.ip4, address, 4);
+    } else if (type == IPv6) {
+        setV6();
+        memcpy(&this->_ip.u_addr.ip6.addr[0], address, 16);
+        setZone(zone);
+    } else {
+#if LWIP_IPV6
+        _ip = *IP6_ADDR_ANY;
+#else
+        _ip = *IP_ADDR_ANY;
+#endif
+    }
 
-bool IPAddress::operator==(const uint8_t* addr) const
-{
-    return memcmp(addr, _address.bytes, sizeof(_address.bytes)) == 0;
 }
 
-size_t IPAddress::printTo(Print& p) const
-{
-    size_t n = 0;
-    for(int i = 0; i < 3; i++) {
-        n += p.print(_address.bytes[i], DEC);
-        n += p.print('.');
+bool IPAddress::fromString(const char *address) {
+    if (!fromString4(address)) {
+#if LWIP_IPV6
+        return fromString6(address);
+#else
+        return false;
+#endif
     }
-    n += p.print(_address.bytes[3], DEC);
-    return n;
-}
-
-String IPAddress::toString() const
-{
-    char szRet[16];
-    sprintf(szRet,"%u.%u.%u.%u", _address.bytes[0], _address.bytes[1], _address.bytes[2], _address.bytes[3]);
-    return String(szRet);
+    return true;
 }
 
-bool IPAddress::fromString(const char *address)
-{
-    // TODO: add support for "a", "a.b", "a.b.c" formats
+bool IPAddress::fromString4(const char *address) {
+    // TODO: (IPv4) add support for "a", "a.b", "a.b.c" formats
 
     uint16_t acc = 0; // Accumulator
     uint8_t dots = 0;
@@ -103,7 +121,7 @@ bool IPAddress::fromString(const char *address)
                 // Too much dots (there must be 3 dots)
                 return false;
             }
-            _address.bytes[dots++] = acc;
+            (*this)[dots++] = acc;
             acc = 0;
         }
         else
@@ -117,9 +135,122 @@ bool IPAddress::fromString(const char *address)
         // Too few dots (there must be 3 dots)
         return false;
     }
-    _address.bytes[3] = acc;
+    (*this)[3] = acc;
+
+    setV4();
     return true;
 }
 
+IPAddress& IPAddress::operator=(const uint8_t *address) {
+    uint32_t value;
+    memcpy_P(&value, address, sizeof(value));
+    *this = value;
+    return *this;
+}
+
+IPAddress& IPAddress::operator=(uint32_t address) {
+    setV4();
+    v4() = address;
+    return *this;
+}
+
+bool IPAddress::operator==(const uint8_t* addr) const {
+    if (!isV4()) {
+        return false;
+    }
+
+    uint32_t value;
+    memcpy_P(&value, addr, sizeof(value));
+
+    return v4() == value;
+}
+
+size_t IPAddress::printTo(Print& p) const {
+    size_t n = 0;
+
+#if LWIP_IPV6
+    if (isV6()) {
+        int count0 = 0;
+        for (int i = 0; i < 8; i++) {
+            uint16_t bit = PP_NTOHS(raw6()[i]);
+            if (bit || count0 < 0) {
+                n += p.printf("%x", bit);
+                if (count0 > 0)
+                    // no more hiding 0
+                    count0 = -8;
+            } else
+                count0++;
+            if ((i != 7 && count0 < 2) || count0 == 7)
+                n += p.print(':');
+        }
+        // add a zone if zone-id si non-zero
+        if (_ip.u_addr.ip6.zone) {
+            n += p.print('%');
+            char if_name[NETIF_NAMESIZE];
+            netif_index_to_name(_ip.u_addr.ip6.zone, if_name);
+            n += p.print(if_name);
+        }
+        return n;
+    }
+#endif
+
+    for(int i = 0; i < 4; i++) {
+        n += p.print((*this)[i], DEC);
+        if (i != 3)
+            n += p.print('.');
+    }
+    return n;
+}
+
+String IPAddress::toString() const
+{
+    StreamString sstr;
+#if LWIP_IPV6
+    if (isV6())
+        sstr.reserve(44); // 8 shorts x 4 chars each + 7 colons + nullterm + '%' + zone-id
+    else
+#endif
+        sstr.reserve(16); // 4 bytes with 3 chars max + 3 dots + nullterm, or '(IP unset)'
+    printTo(sstr);
+    return sstr;
+}
+
+bool IPAddress::isValid(const String& arg) {
+	return IPAddress().fromString(arg);
+}
+
+bool IPAddress::isValid(const char* arg) {
+	return IPAddress().fromString(arg);
+}
+
+const IPAddress INADDR46_ANY; // generic "0.0.0.0" for IPv4 & IPv6
+const IPAddress INADDR46_NONE(255,255,255,255);
+
+void IPAddress::clear() {
+    (*this) = INADDR46_ANY;
+}
+
+/**************************************/
+
+#if LWIP_IPV6
+
+bool IPAddress::fromString6(const char *address) {
+    ip6_addr_t ip6;
+    if (ip6addr_aton(address, &ip6)) {
+        setV6();
+        memcpy(&this->_ip.u_addr.ip6.addr[0], ip6.addr, 16);
+        // look for '%' in string
+        const char *s = address;
+        while (*s && *s != '%') { s++; }
+        if (*s == '%') {
+            // we have a zone id
+            setZone(netif_name_to_index(s + 1));
+        }
+        return true;
+    }
+    return false;
+}
+#endif // LWIP_IPV6
+
 // declared one time - as external in IPAddress.h
-IPAddress INADDR_NONE(0, 0, 0, 0);
+IPAddress INADDR_NONE(0, 0, 0, 0);      // TODO