Method IsValid

src/netbase.cpp:667–699

bool CNetAddr::IsMulticast() const { return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0) || (GetByte(15) == 0xFF); }

bool CNetAddr::IsValid() const {
    // Cleanup 3-byte shifted addresses caused by garbage in size field
    // of addr messages from versions before 0.2.9 checksum.
    // Two consecutive addr messages look like this:
    // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
    // so if the first length field is garbled, it reads the second batch
    // of addr misaligned by 3 bytes.
    if (memcmp(ip, pchIPv4 + 3, sizeof(pchIPv4) - 3) == 0)
        return false;

    // unspecified IPv6 address (::/128)
    uint8_t ipNone[16] = {};
    if (memcmp(ip, ipNone, 16) == 0)
        return false;

    // documentation IPv6 address
    if (IsRFC3849())
        return false;

    if (IsIPv4()) {
        // INADDR_NONE
        uint32_t ipNone = INADDR_NONE;
        if (memcmp(ip + 12, &ipNone, 4) == 0)
            return false;

        // 0
        ipNone = 0;
        if (memcmp(ip + 12, &ipNone, 4) == 0)
            return false;
    }

    return true;
}

bool CNetAddr::IsRoutable() const {
    return IsValid() &&