libNet: answer sceNpGetAccountLanguage2 as a signed-out user (#1186)

* libNet: answer sceNpGetAccountLanguage2 as a signed-out user

sceNpGetAccountLanguage2 was not registered, so games that call it hit
the unresolved-import stub. The stub returns 0, which tells the game the
request succeeded and that the language code buffer now holds the
account's language, but nothing was written to it.

Saros (#1053) calls it from its analytics thread right after
sceNpGetAccountAge, each on its own request. sceNpGetAccountAge already
reports SCE_NP_ERROR_SIGNED_OUT there, so the game is told the user is
signed out for one query and signed in for the next. Demon's Souls
(#890), Ghost of Yotei (#1095) and NHL 27 (#1101) import it as well.

Register it next to the other NpManager account queries and answer the
way they do: SCE_NP_ERROR_INVALID_ARGUMENT for a request id <= 0 or a
null output pointer, SCE_NP_ERROR_SIGNED_OUT otherwise. The output is
left untouched because nothing was looked up.

* libNet: reject missing account language requests

---------

Co-authored-by: overlordxrz-source <overlordxrz-source@users.noreply.github.com>
Co-authored-by: nmzik <Nmzik@mail.ru>

src/libs/libNet.cpp

@@ -1559,6 +1559,7 @@ LIB_DEFINE(InitNet_1_NpManager) {
 	LIB_FUNC("rbknaUjpqWo", NpManager::NpGetAccountIdA);
 	LIB_FUNC("JT+t00a3TxA", NpManager::NpGetAccountCountryA);
 	LIB_FUNC("+4DegjBqV1g", NpManager::NpGetAccountAge);
+	LIB_FUNC("3Tcz5bNCfZQ", NpManager::NpGetAccountLanguage2);
 	LIB_FUNC("GpLQDNKICac", NpManager::NpCreateRequest);
 	LIB_FUNC("eiqMCt9UshI", NpManager::NpCreateAsyncRequest);
 	LIB_FUNC("S7QTn72PrDw", NpManager::NpDeleteRequest);

src/libs/network.cpp

@@ -4106,6 +4106,26 @@ int KYTY_SYSV_ABI NpGetAccountAge(int req_id, int user_id, uint8_t* age) {
 	return np_error_signed_out;
 }
 
+int KYTY_SYSV_ABI NpGetAccountLanguage2(int req_id, int user_id, void* language_code) {
+	PRINT_NAME();
+
+	LOGF("\t req_id        = %d\n", req_id);
+	LOGF("\t user_id       = %d\n", user_id);
+	LOGF("\t language_code = 0x%016" PRIx64 "\n", reinterpret_cast<uint64_t>(language_code));
+
+	if (req_id <= 0 || language_code == nullptr) {
+		return np_error_invalid_argument;
+	}
+
+	std::lock_guard lock(g_np_request_mutex);
+
+	if (np_get_request_locked(req_id) == nullptr) {
+		return np_error_request_not_found;
+	}
+
+	return np_error_signed_out;
+}
+
 int KYTY_SYSV_ABI NpCreateRequest() {
 	PRINT_NAME();
 

src/libs/network.h

@@ -187,6 +187,7 @@ int KYTY_SYSV_ABI  NpGetOnlineId(int user_id, NpOnlineId* online_id);
 int KYTY_SYSV_ABI  NpGetAccountIdA(int user_id, uint64_t* account_id);
 int KYTY_SYSV_ABI  NpGetAccountCountryA(int user_id, void* country_code);
 int KYTY_SYSV_ABI  NpGetAccountAge(int req_id, int user_id, uint8_t* age);
+int KYTY_SYSV_ABI  NpGetAccountLanguage2(int req_id, int user_id, void* language_code);
 int KYTY_SYSV_ABI  NpCreateRequest();
 int KYTY_SYSV_ABI  NpCreateAsyncRequest(const NpCreateAsyncRequestParameter* param);
 int KYTY_SYSV_ABI  NpDeleteRequest(int req_id);