fix(net): Fix IPv4 address construction from ip_addr_t and comparison (espressif#9724) (espressif#9725)

Author: mathieucarbou

cores/esp32/IPAddress.cpp

@@ -266,7 +266,7 @@ IPAddress &IPAddress::operator=(const IPAddress &address) {
 }
 
 bool IPAddress::operator==(const IPAddress &addr) const {
- return (addr._type == _type) && (memcmp(addr._address.bytes, _address.bytes, sizeof(_address.bytes)) == 0);
+ return (addr._type == _type) && (_type == IPType::IPv4 ? addr._address.dword[IPADDRESS_V4_DWORD_INDEX] == _address.dword[IPADDRESS_V4_DWORD_INDEX] : memcmp(addr._address.bytes, _address.bytes, sizeof(_address.bytes)) == 0);
 }
 
 bool IPAddress::operator==(const uint8_t *addr) const {
@@ -395,6 +395,7 @@ IPAddress &IPAddress::from_ip_addr_t(const ip_addr_t *addr) {
 #endif /* LWIP_IPV6_SCOPES */
  } else {
  _type = IPv4;
+ memset(_address.bytes, 0, sizeof(_address.bytes));
  _address.dword[IPADDRESS_V4_DWORD_INDEX] = addr->u_addr.ip4.addr;
  }
  return *this;