3 files changed, 215 insertions, 0 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index c85c9485f..48578ad48 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -501,6 +501,8 @@ add_library(core STATIC
     hle/service/sockets/sfdnsres.h
     hle/service/sockets/sockets.cpp
     hle/service/sockets/sockets.h
+    hle/service/sockets/sockets_translate.cpp
+    hle/service/sockets/sockets_translate.h
     hle/service/spl/csrng.cpp
     hle/service/spl/csrng.h
     hle/service/spl/module.cpp
diff --git a/src/core/hle/service/sockets/sockets_translate.cpp b/src/core/hle/service/sockets/sockets_translate.cpp
new file mode 100644
index 000000000..2be8f642d
--- /dev/null
+++ b/src/core/hle/service/sockets/sockets_translate.cpp
@@ -0,0 +1,165 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <utility>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/hle/service/sockets/sockets.h"
+#include "core/hle/service/sockets/sockets_translate.h"
+#include "core/network/network.h"
+
+namespace Service::Sockets {
+
+Errno Translate(Network::Errno value) {
+    switch (value) {
+    case Network::Errno::SUCCESS:
+        return Errno::SUCCESS;
+    case Network::Errno::BADF:
+        return Errno::BADF;
+    case Network::Errno::AGAIN:
+        return Errno::AGAIN;
+    case Network::Errno::INVAL:
+        return Errno::INVAL;
+    case Network::Errno::MFILE:
+        return Errno::MFILE;
+    case Network::Errno::NOTCONN:
+        return Errno::NOTCONN;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented errno={}", static_cast<int>(value));
+        return Errno::SUCCESS;
+    }
+}
+
+std::pair<s32, Errno> Translate(std::pair<s32, Network::Errno> value) {
+    return {value.first, Translate(value.second)};
+}
+
+Network::Domain Translate(Domain domain) {
+    switch (domain) {
+    case Domain::INET:
+        return Network::Domain::INET;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented domain={}", static_cast<int>(domain));
+        return {};
+    }
+}
+
+Domain Translate(Network::Domain domain) {
+    switch (domain) {
+    case Network::Domain::INET:
+        return Domain::INET;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented domain={}", static_cast<int>(domain));
+        return {};
+    }
+}
+
+Network::Type Translate(Type type) {
+    switch (type) {
+    case Type::STREAM:
+        return Network::Type::STREAM;
+    case Type::DGRAM:
+        return Network::Type::DGRAM;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented type={}", static_cast<int>(type));
+    }
+}
+
+Network::Protocol Translate(Type type, Protocol protocol) {
+    switch (protocol) {
+    case Protocol::UNSPECIFIED:
+        LOG_WARNING(Service, "Unspecified protocol, assuming protocol from type");
+        switch (type) {
+        case Type::DGRAM:
+            return Network::Protocol::UDP;
+        case Type::STREAM:
+            return Network::Protocol::TCP;
+        default:
+            return Network::Protocol::TCP;
+        }
+    case Protocol::TCP:
+        return Network::Protocol::TCP;
+    case Protocol::UDP:
+        return Network::Protocol::UDP;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented protocol={}", static_cast<int>(protocol));
+        return Network::Protocol::TCP;
+    }
+}
+
+u16 TranslatePollEventsToHost(u16 flags) {
+    u16 result = 0;
+    const auto translate = [&result, &flags](u16 from, u16 to) {
+        if ((flags & from) != 0) {
+            flags &= ~from;
+            result |= to;
+        }
+    };
+    translate(POLL_IN, Network::POLL_IN);
+    translate(POLL_PRI, Network::POLL_PRI);
+    translate(POLL_OUT, Network::POLL_OUT);
+    translate(POLL_ERR, Network::POLL_ERR);
+    translate(POLL_HUP, Network::POLL_HUP);
+    translate(POLL_NVAL, Network::POLL_NVAL);
+
+    UNIMPLEMENTED_IF_MSG(flags != 0, "Unimplemented flags={}", flags);
+    return result;
+}
+
+u16 TranslatePollEventsToGuest(u16 flags) {
+    u16 result = 0;
+    const auto translate = [&result, &flags](u16 from, u16 to) {
+        if ((flags & from) != 0) {
+            flags &= ~from;
+            result |= to;
+        }
+    };
+
+    translate(Network::POLL_IN, POLL_IN);
+    translate(Network::POLL_PRI, POLL_PRI);
+    translate(Network::POLL_OUT, POLL_OUT);
+    translate(Network::POLL_ERR, POLL_ERR);
+    translate(Network::POLL_HUP, POLL_HUP);
+    translate(Network::POLL_NVAL, POLL_NVAL);
+
+    UNIMPLEMENTED_IF_MSG(flags != 0, "Unimplemented flags={}", flags);
+    return result;
+}
+
+Network::SockAddrIn Translate(SockAddrIn value) {
+    ASSERT(value.len == 0 || value.len == sizeof(value));
+
+    Network::SockAddrIn result;
+    result.family = Translate(static_cast<Domain>(value.family));
+    result.ip = value.ip;
+    result.portno = value.portno >> 8 | value.portno << 8;
+    return result;
+}
+
+SockAddrIn Translate(Network::SockAddrIn value) {
+    SockAddrIn result;
+    result.len = sizeof(result);
+    result.family = static_cast<u8>(Translate(value.family));
+    result.portno = value.portno >> 8 | value.portno << 8;
+    result.ip = value.ip;
+    result.zeroes = {};
+    return result;
+}
+
+Network::ShutdownHow Translate(ShutdownHow how) {
+    switch (how) {
+    case ShutdownHow::RD:
+        return Network::ShutdownHow::RD;
+    case ShutdownHow::WR:
+        return Network::ShutdownHow::WR;
+    case ShutdownHow::RDWR:
+        return Network::ShutdownHow::RDWR;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented how={}", static_cast<int>(how));
+        return {};
+    }
+}
+
+} // namespace Service::Sockets
diff --git a/src/core/hle/service/sockets/sockets_translate.h b/src/core/hle/service/sockets/sockets_translate.h
new file mode 100644
index 000000000..8ed041e31
--- /dev/null
+++ b/src/core/hle/service/sockets/sockets_translate.h
@@ -0,0 +1,48 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <utility>
+
+#include "common/common_types.h"
+#include "core/hle/service/sockets/sockets.h"
+#include "core/network/network.h"
+
+namespace Service::Sockets {
+
+/// Translate abstract errno to guest errno
+Errno Translate(Network::Errno value);
+
+/// Translate abstract return value errno pair to guest return value errno pair
+std::pair<s32, Errno> Translate(std::pair<s32, Network::Errno> value);
+
+/// Translate guest domain to abstract domain
+Network::Domain Translate(Domain domain);
+
+/// Translate abstract domain to guest domain
+Domain Translate(Network::Domain domain);
+
+/// Translate guest type to abstract type
+Network::Type Translate(Type type);
+
+/// Translate guest protocol to abstract protocol
+Network::Protocol Translate(Type type, Protocol protocol);
+
+/// Translate abstract poll event flags to guest poll event flags
+u16 TranslatePollEventsToHost(u16 flags);
+
+/// Translate guest poll event flags to abstract poll event flags
+u16 TranslatePollEventsToGuest(u16 flags);
+
+/// Translate guest socket address structure to abstract socket address structure
+Network::SockAddrIn Translate(SockAddrIn value);
+
+/// Translate abstract socket address structure to guest socket address structure
+SockAddrIn Translate(Network::SockAddrIn value);
+
+/// Translate guest shutdown mode to abstract shutdown mode
+Network::ShutdownHow Translate(ShutdownHow how);
+
+} // namespace Service::Sockets