Fix IP address serialization on big endian

IP addresses are stored in network byte order even on little
endian hosts

contrib/epee/include/net/net_utils_base.h

@@ -38,6 +38,7 @@
 #include "enums.h"
 #include "misc_log_ex.h"
 #include "serialization/keyvalue_serialization.h"
+#include "int-util.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY
 #define MONERO_DEFAULT_LOG_CATEGORY "net"
@@ -91,7 +92,20 @@ namespace net_utils
 		static constexpr bool is_blockable() noexcept { return true; }
 
 		BEGIN_KV_SERIALIZE_MAP()
-			KV_SERIALIZE(m_ip)
+			if (is_store)
+			{
+				KV_SERIALIZE_VAL_POD_AS_BLOB_N(m_ip, "ip")
+				uint32_t ip = SWAP32LE(this_ref.m_ip);
+				epee::serialization::selector<is_store>::serialize(ip, stg, hparent_section, "m_ip");
+			}
+			else
+			{
+				if (!epee::serialization::selector<is_store>::serialize_t_val_as_blob(this_ref.m_ip, stg, hparent_section, "ip"))
+				{
+					KV_SERIALIZE(m_ip)
+					const_cast<ipv4_network_address&>(this_ref).m_ip = SWAP32LE(this_ref.m_ip);
+				}
+			}
 			KV_SERIALIZE(m_port)
 		END_KV_SERIALIZE_MAP()
 	};

src/p2p/net_peerlist_boost_serialization.h

@@ -95,7 +95,9 @@ namespace boost
     {
       uint32_t ip{na.ip()};
       uint16_t port{na.port()};
+      ip = SWAP32LE(ip);
       a & ip;
+      ip = SWAP32LE(ip);
       a & port;
       if (!typename Archive::is_saving())
         na = epee::net_utils::ipv4_network_address{ip, port};