network: Add NOMEM errno handling for socket operations

Implements support for ENOMEM (errno 12) across the network stack:
- Added NOMEM to Network::Errno enum
- Added NOMEM = 12 to sockets Errno enum
- Added translation case in sockets_translate.cpp

This is the first step towards addressing the 0.0 FPS bug that occurs
when the system runs out of memory during socket operations. Previously,
these operations would trigger an unimplemented assertion, causing the
emulator to halt. Now the error will be properly propagated to the guest
application.

3 files changed, 4 insertions, 0 deletions

diff --git a/src/core/hle/service/sockets/sockets.h b/src/core/hle/service/sockets/sockets.h
index f3ea31bde..978796455 100644
--- a/src/core/hle/service/sockets/sockets.h
+++ b/src/core/hle/service/sockets/sockets.h
@@ -26,6 +26,7 @@ enum class Errno : u32 {
     TIMEDOUT = 110,
     CONNREFUSED = 111,
     INPROGRESS = 115,
+    NOMEM = 12,
 };
 
 enum class GetAddrInfoError : s32 {
diff --git a/src/core/hle/service/sockets/sockets_translate.cpp b/src/core/hle/service/sockets/sockets_translate.cpp
index 21bb3e776..b9a3ba029 100644
--- a/src/core/hle/service/sockets/sockets_translate.cpp
+++ b/src/core/hle/service/sockets/sockets_translate.cpp
@@ -37,6 +37,8 @@ Errno Translate(Network::Errno value) {
         return Errno::CONNRESET;
     case Network::Errno::INPROGRESS:
         return Errno::INPROGRESS;
+    case Network::Errno::NOMEM:
+        return Errno::NOMEM;
     default:
         UNIMPLEMENTED_MSG("Unimplemented errno={}", value);
         return Errno::SUCCESS;
diff --git a/src/core/internal_network/network.h b/src/core/internal_network/network.h
index 2e0f68c2e..78905ca60 100644
--- a/src/core/internal_network/network.h
+++ b/src/core/internal_network/network.h
@@ -46,6 +46,7 @@ enum class Errno {
     MSGSIZE,
     INPROGRESS,
     OTHER,
+    NOMEM,
 };
 
 enum class GetAddrInfoError {