SOC_U: Preliminary implementation of sockets.

Stubbed CreateMemoryBlock

Using Berkeley sockets, and Winsock2.2 on Windows.
So far ftpony creates the socket and accepts incoming connections

SOC_U: Renamed functions to maintain consistency

Also prevents possible scope errors / conflicts with the actual Berkeley socket functions

SOCU: Close all the opened sockets when cleaning up SOCU

src/citra/CMakeLists.txt

@@ -24,10 +24,10 @@ endif()
 if (APPLE)
     target_link_libraries(citra iconv ${COREFOUNDATION_LIBRARY})
 elseif (WIN32)
-    target_link_libraries(citra winmm)
+    target_link_libraries(citra winmm wsock32 ws2_32)
     if (MINGW) # GCC does not support codecvt, so use iconv instead
         target_link_libraries(citra iconv)
-    endif()    
+    endif()
 else() # Unix
     target_link_libraries(citra rt)
 endif()

src/citra_qt/CMakeLists.txt

@@ -68,7 +68,7 @@ endif()
 if (APPLE)
     target_link_libraries(citra-qt iconv ${COREFOUNDATION_LIBRARY})
 elseif (WIN32)
-    target_link_libraries(citra-qt winmm)
+    target_link_libraries(citra-qt winmm wsock32 ws2_32)
 else() # Unix
     target_link_libraries(citra-qt rt)
 endif()

src/common/logging/backend.cpp

@@ -39,6 +39,7 @@ static std::shared_ptr<Logger> global_logger;
         SUB(Service, CFG) \
         SUB(Service, DSP) \
         SUB(Service, HID) \
+        SUB(Service, SOC) \
         CLS(HW) \
         SUB(HW, Memory) \
         SUB(HW, GPU) \

src/common/logging/log.h

@@ -59,6 +59,7 @@ enum class Class : ClassType {
     Service_CFG,                ///< The CFG (Configuration) service
     Service_DSP,                ///< The DSP (DSP control) service
     Service_HID,                ///< The HID (User input) service
+    Service_SOC,                ///< The SOC (Socket) service
     HW,                         ///< Low-level hardware emulation
     HW_Memory,                  ///< Memory-map and address translation
     HW_GPU,                     ///< GPU control emulation

src/core/hle/function_wrappers.h

@@ -128,6 +128,13 @@ template<s32 func(s32*, u32, s32)> void Wrap() {
     FuncReturn(retval);
 }
 
+template<s32 func(u32*, u32, u32, u32, u32)> void Wrap() {
+    u32 param_1 = 0;
+    u32 retval = func(&param_1, PARAM(1), PARAM(2), PARAM(3), PARAM(4));
+    Core::g_app_core->SetReg(1, param_1);
+    FuncReturn(retval);
+}
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Function wrappers that return type u32
 

src/core/hle/service/soc_u.cpp

@@ -2,40 +2,712 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/platform.h"
+
+#if EMU_PLATFORM == PLATFORM_WINDOWS
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <poll.h>
+#endif
+
 #include "common/log.h"
+#include "common/scope_exit.h"
 #include "core/hle/hle.h"
 #include "core/hle/service/soc_u.h"
+#include <unordered_map>
+
+#if EMU_PLATFORM == PLATFORM_WINDOWS
+#    define WSAEAGAIN      WSAEWOULDBLOCK
+#    define WSAEMULTIHOP   -1 // Invalid dummy value
+#    define ERRNO(x)       WSA##x
+#    define GET_ERRNO      WSAGetLastError()
+#    define poll(x, y, z)  WSAPoll(x, y, z);
+#else
+#    define ERRNO(x)       x
+#    define GET_ERRNO      errno
+#    define closesocket(x) close(x)
+#endif
+
+static const s32 SOCKET_ERROR_VALUE = -1;
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Namespace SOC_U
 
 namespace SOC_U {
 
+/// Holds the translation from system network errors to 3DS network errors
+static const std::unordered_map<int, int> error_map = { {
+    { E2BIG, 1 },
+    { ERRNO(EACCES), 2 },
+    { ERRNO(EADDRINUSE), 3 },
+    { ERRNO(EADDRNOTAVAIL), 4 },
+    { ERRNO(EAFNOSUPPORT), 5 },
+    { ERRNO(EAGAIN), 6 },
+    { ERRNO(EALREADY), 7 },
+    { ERRNO(EBADF), 8 },
+    { EBADMSG, 9 },
+    { EBUSY, 10 },
+    { ECANCELED, 11 },
+    { ECHILD, 12 },
+    { ERRNO(ECONNABORTED), 13 },
+    { ERRNO(ECONNREFUSED), 14 },
+    { ERRNO(ECONNRESET), 15 },
+    { EDEADLK, 16 },
+    { ERRNO(EDESTADDRREQ), 17 },
+    { EDOM, 18 },
+    { ERRNO(EDQUOT), 19 },
+    { EEXIST, 20 },
+    { ERRNO(EFAULT), 21 },
+    { EFBIG, 22 },
+    { ERRNO(EHOSTUNREACH), 23 },
+    { EIDRM, 24 },
+    { EILSEQ, 25 },
+    { ERRNO(EINPROGRESS), 26 },
+    { ERRNO(EINTR), 27 },
+    { ERRNO(EINVAL), 28 },
+    { EIO, 29 },
+    { ERRNO(EISCONN), 30 },
+    { EISDIR, 31 },
+    { ERRNO(ELOOP), 32 },
+    { ERRNO(EMFILE), 33 },
+    { EMLINK, 34 },
+    { ERRNO(EMSGSIZE), 35 },
+    { ERRNO(EMULTIHOP), 36 },
+    { ERRNO(ENAMETOOLONG), 37 },
+    { ERRNO(ENETDOWN), 38 },
+    { ERRNO(ENETRESET), 39 },
+    { ERRNO(ENETUNREACH), 40 },
+    { ENFILE, 41 },
+    { ERRNO(ENOBUFS), 42 },
+    { ENODATA, 43 },
+    { ENODEV, 44 },
+    { ENOENT, 45 },
+    { ENOEXEC, 46 },
+    { ENOLCK, 47 },
+    { ENOLINK, 48 },
+    { ENOMEM, 49 },
+    { ENOMSG, 50 },
+    { ERRNO(ENOPROTOOPT), 51 },
+    { ENOSPC, 52 },
+    { ENOSR, 53 },
+    { ENOSTR, 54 },
+    { ENOSYS, 55 },
+    { ERRNO(ENOTCONN), 56 },
+    { ENOTDIR, 57 },
+    { ERRNO(ENOTEMPTY), 58 },
+    { ERRNO(ENOTSOCK), 59 },
+    { ENOTSUP, 60 },
+    { ENOTTY, 61 },
+    { ENXIO, 62 },
+    { ERRNO(EOPNOTSUPP), 63 },
+    { EOVERFLOW, 64 },
+    { EPERM, 65 },
+    { EPIPE, 66 },
+    { EPROTO, 67 },
+    { ERRNO(EPROTONOSUPPORT), 68 },
+    { ERRNO(EPROTOTYPE), 69 },
+    { ERANGE, 70 },
+    { EROFS, 71 },
+    { ESPIPE, 72 },
+    { ESRCH, 73 },
+    { ERRNO(ESTALE), 74 },
+    { ETIME, 75 },
+    { ERRNO(ETIMEDOUT), 76 }
+}};
+
+/// Converts a network error from platform-specific to 3ds-specific
+static int TranslateError(int error) {
+    auto found = error_map.find(error);
+    if (found != error_map.end())
+        return -found->second;
+    
+    return error;
+}
+
+/// Holds information about a particular socket
+struct SocketHolder {
+    u32 socket_fd; ///< The socket descriptor
+    bool blocking; ///< Whether the socket is blocking or not, it is only read on Windows.
+};
+
+/// Structure to represent the 3ds' pollfd structure, which is different than most implementations
+struct CTRPollFD {
+    u32 fd; ///< Socket handle
+
+    union Events {
+        u32 hex; ///< The complete value formed by the flags
+        BitField<0, 1, u32> pollin;
+        BitField<1, 1, u32> pollpri;
+        BitField<2, 1, u32> pollhup;
+        BitField<3, 1, u32> pollerr;
+        BitField<4, 1, u32> pollout;
+        BitField<5, 1, u32> pollnval;
+
+        Events& operator=(const Events& other) {
+            hex = other.hex;
+            return *this;
+        }
+
+        /// Translates the resulting events of a Poll operation from platform-specific to 3ds specific
+        static Events TranslateTo3DS(u32 input_event) {
+            Events ev = {};
+            if (input_event & POLLIN)
+                ev.pollin = 1;
+            if (input_event & POLLPRI)
+                ev.pollpri = 1;
+            if (input_event & POLLHUP)
+                ev.pollhup = 1;
+            if (input_event & POLLERR)
+                ev.pollerr = 1;
+            if (input_event & POLLOUT)
+                ev.pollout = 1;
+            if (input_event & POLLNVAL)
+                ev.pollnval = 1;
+            return ev;
+        }
+
+        /// Translates the resulting events of a Poll operation from 3ds specific to platform specific
+        static u32 TranslateToPlatform(Events input_event) {
+            u32 ret = 0;
+            if (input_event.pollin)
+                ret |= POLLIN;
+            if (input_event.pollpri)
+                ret |= POLLPRI;
+            if (input_event.pollhup)
+                ret |= POLLHUP;
+            if (input_event.pollerr)
+                ret |= POLLERR;
+            if (input_event.pollout)
+                ret |= POLLOUT;
+            if (input_event.pollnval)
+                ret |= POLLNVAL;
+            return ret;
+        }
+    };
+    Events events; ///< Events to poll for (input)
+    Events revents; ///< Events received (output)
+
+    /// Converts a platform-specific pollfd to a 3ds specific structure
+    static CTRPollFD FromPlatform(pollfd const& fd) {
+        CTRPollFD result;
+        result.events.hex = Events::TranslateTo3DS(fd.events).hex;
+        result.revents.hex = Events::TranslateTo3DS(fd.revents).hex;
+        result.fd = static_cast<u32>(fd.fd);
+        return result;
+    }
+
+    /// Converts a 3ds specific pollfd to a platform-specific structure
+    static pollfd ToPlatform(CTRPollFD const& fd) {
+        pollfd result;
+        result.events = Events::TranslateToPlatform(fd.events);
+        result.revents = Events::TranslateToPlatform(fd.revents);
+        result.fd = fd.fd;
+        return result;
+    }
+};
+
+/// Union to represent the 3ds' sockaddr structure
+union CTRSockAddr {
+    /// Structure to represent a raw sockaddr
+    struct {
+        u8 len; ///< The length of the entire structure, only the set fields count
+        u8 sa_family; ///< The address family of the sockaddr
+        u8 sa_data[0x1A]; ///< The extra data, this varies, depending on the address family
+    } raw;
+
+    /// Structure to represent the 3ds' sockaddr_in structure
+    struct CTRSockAddrIn {
+        u8 len; ///< The length of the entire structure
+        u8 sin_family; ///< The address family of the sockaddr_in
+        u16 sin_port; ///< The port associated with this sockaddr_in
+        u32 sin_addr; ///< The actual address of the sockaddr_in
+    } in;
+
+    /// Convert a 3DS CTRSockAddr to a platform-specific sockaddr
+    static sockaddr ToPlatform(CTRSockAddr const& ctr_addr) {
+        sockaddr result;
+        result.sa_family = ctr_addr.raw.sa_family;
+        memset(result.sa_data, 0, sizeof(result.sa_data));
+
+        // We can not guarantee ABI compatibility between platforms so we copy the fields manually
+        switch (result.sa_family) {
+        case AF_INET:
+        {
+            sockaddr_in* result_in = reinterpret_cast<sockaddr_in*>(&result);
+            result_in->sin_port = ctr_addr.in.sin_port;
+            result_in->sin_addr.s_addr = ctr_addr.in.sin_addr;
+            memset(result_in->sin_zero, 0, sizeof(result_in->sin_zero));
+            break;
+        }
+        default:
+            _dbg_assert_msg_(Service_SOC, false, "Unhandled address family (sa_family) in CTRSockAddr::ToPlatform");
+            break;
+        }
+        return result;
+    }
+
+    /// Convert a platform-specific sockaddr to a 3DS CTRSockAddr
+    static CTRSockAddr FromPlatform(sockaddr const& addr) {
+        CTRSockAddr result;
+        result.raw.sa_family = static_cast<u8>(addr.sa_family);
+        // We can not guarantee ABI compatibility between platforms so we copy the fields manually
+        switch (result.raw.sa_family) {
+        case AF_INET:
+        {
+            sockaddr_in const* addr_in = reinterpret_cast<sockaddr_in const*>(&addr);
+            result.raw.len = sizeof(CTRSockAddrIn);
+            result.in.sin_port = addr_in->sin_port;
+            result.in.sin_addr = addr_in->sin_addr.s_addr;
+            break;
+        }
+        default:
+            _dbg_assert_msg_(Service_SOC, false, "Unhandled address family (sa_family) in CTRSockAddr::ToPlatform");
+            break;
+        }
+        return result;
+    }
+};
+
+/// Holds info about the currently open sockets
+static std::unordered_map<u32, SocketHolder> open_sockets;
+
+/// Close all open sockets
+static void CleanupSockets() {
+    for (auto sock : open_sockets)
+        closesocket(sock.second.socket_fd);
+    open_sockets.clear();
+}
+
+static void Socket(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 domain = cmd_buffer[1]; // Address family
+    u32 type = cmd_buffer[2];
+    u32 protocol = cmd_buffer[3];
+
+    // Only 0 is allowed according to 3dbrew, using 0 will let the OS decide which protocol to use
+    if (protocol != 0) {
+        cmd_buffer[1] = UnimplementedFunction(ErrorModule::SOC).raw; // TODO(Subv): Correct error code
+        return;
+    }
+
+    if (domain != AF_INET) {
+        cmd_buffer[1] = UnimplementedFunction(ErrorModule::SOC).raw; // TODO(Subv): Correct error code
+        return;
+    }
+
+    if (type != SOCK_DGRAM && type != SOCK_STREAM) {
+        cmd_buffer[1] = UnimplementedFunction(ErrorModule::SOC).raw; // TODO(Subv): Correct error code
+        return;
+    }
+
+    u32 socket_handle = static_cast<u32>(::socket(domain, type, protocol));
+
+    if (socket_handle != SOCKET_ERROR_VALUE)
+        open_sockets[socket_handle] = { socket_handle, true };
+
+    int result = 0;
+    if (socket_handle == SOCKET_ERROR_VALUE)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[1] = result;
+    cmd_buffer[2] = socket_handle;
+}
+
+static void Bind(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    u32 len = cmd_buffer[2];
+    CTRSockAddr* ctr_sock_addr = reinterpret_cast<CTRSockAddr*>(Memory::GetPointer(cmd_buffer[6]));
+
+    if (ctr_sock_addr == nullptr) {
+        cmd_buffer[1] = -1; // TODO(Subv): Correct code
+        return;
+    }
+
+    sockaddr sock_addr = CTRSockAddr::ToPlatform(*ctr_sock_addr);
+
+    int res = ::bind(socket_handle, &sock_addr, std::max<u32>(sizeof(sock_addr), len));
+    
+    int result = 0;
+    if (res != 0)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[2] = res;
+    cmd_buffer[1] = result;
+}
+
+static void Fcntl(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    u32 ctr_cmd = cmd_buffer[2];
+    u32 ctr_arg = cmd_buffer[3];
+ 
+    int result = 0;
+    u32 posix_ret = 0; // TODO: Check what hardware returns for F_SETFL (unspecified by POSIX)
+    SCOPE_EXIT({
+            cmd_buffer[1] = result;
+            cmd_buffer[2] = posix_ret;
+    });
+ 
+    if (ctr_cmd == 3) { // F_GETFL
+#if EMU_PLATFORM == PLATFORM_WINDOWS
+        posix_ret = 0;
+        auto iter = open_sockets.find(socket_handle);
+        if (iter != open_sockets.end() && iter->second.blocking == false)
+            posix_ret |= 4; // O_NONBLOCK
+#else
+        int ret = ::fcntl(socket_handle, F_GETFL, 0);
+        if (ret == SOCKET_ERROR_VALUE) {
+            result = TranslateError(GET_ERRNO);
+            posix_ret = -1;
+            return;
+        }
+        posix_ret = 0;
+        if (ret & O_NONBLOCK)
+            posix_ret |= 4; // O_NONBLOCK
+#endif
+    } else if (ctr_cmd == 4) { // F_SETFL
+#if EMU_PLATFORM == PLATFORM_WINDOWS
+        unsigned long tmp = (ctr_arg & 4 /* O_NONBLOCK */) ? 1 : 0;
+        int ret = ioctlsocket(socket_handle, FIONBIO, &tmp);
+        if (ret == SOCKET_ERROR_VALUE) {
+            result = TranslateError(GET_ERRNO);
+            posix_ret = -1;
+            return;
+        }
+        auto iter = open_sockets.find(socket_handle);
+        if (iter != open_sockets.end())
+            iter->second.blocking = (tmp == 0);
+#else
+        int flags = ::fcntl(socket_handle, F_GETFL, 0);
+        if (flags == SOCKET_ERROR_VALUE) {
+            result = TranslateError(GET_ERRNO);
+            posix_ret = -1;
+            return;
+        }
+ 
+        flags &= ~O_NONBLOCK;
+        if (ctr_arg & 4) // O_NONBLOCK
+            flags |= O_NONBLOCK;
+ 
+        int ret = ::fcntl(socket_handle, F_SETFL, flags);
+        if (ret == SOCKET_ERROR_VALUE) {
+            result = TranslateError(GET_ERRNO);
+            posix_ret = -1;
+            return;
+        }
+#endif
+    } else {
+        LOG_ERROR(Service_SOC, "Unsupported command (%d) in fcntl call");
+        result = TranslateError(EINVAL); // TODO: Find the correct error
+        posix_ret = -1;
+        return;
+    }
+}
+
+static void Listen(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    u32 backlog = cmd_buffer[2];
+
+    int ret = ::listen(socket_handle, backlog);
+    int result = 0;
+    if (ret != 0)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void Accept(Service::Interface* self) {
+    // TODO(Subv): Calling this function on a blocking socket will block the emu thread, 
+    // preventing graceful shutdown when closing the emulator, this can be fixed by always 
+    // performing nonblocking operations and spinlock until the data is available
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    socklen_t max_addr_len = static_cast<socklen_t>(cmd_buffer[2]);
+    sockaddr addr;
+    socklen_t addr_len = sizeof(addr);
+    u32 ret = static_cast<u32>(::accept(socket_handle, &addr, &addr_len));
+    
+    if (ret != SOCKET_ERROR_VALUE)
+        open_sockets[ret] = { ret, true };
+
+    int result = 0;
+    if (ret == SOCKET_ERROR_VALUE) {
+        result = TranslateError(GET_ERRNO);
+    } else {
+        CTRSockAddr ctr_addr = CTRSockAddr::FromPlatform(addr);
+        Memory::WriteBlock(cmd_buffer[0x104 >> 2], (const u8*)&ctr_addr, max_addr_len);
+    }
+
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void GetHostId(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+
+    char name[128];
+    gethostname(name, sizeof(name));
+    hostent* host = gethostbyname(name);
+    in_addr* addr = reinterpret_cast<in_addr*>(host->h_addr);
+
+    cmd_buffer[2] = addr->s_addr;
+    cmd_buffer[1] = 0;
+}
+
+static void Close(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+
+    int ret = 0;
+    open_sockets.erase(socket_handle);
+
+    ret = closesocket(socket_handle);
+
+    int result = 0;
+    if (ret != 0)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void SendTo(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    u32 len = cmd_buffer[2];
+    u32 flags = cmd_buffer[3];
+    u32 addr_len = cmd_buffer[4];
+
+    u8* input_buff = Memory::GetPointer(cmd_buffer[8]);
+    CTRSockAddr* ctr_dest_addr = reinterpret_cast<CTRSockAddr*>(Memory::GetPointer(cmd_buffer[10]));
+
+    if (ctr_dest_addr == nullptr) {
+        cmd_buffer[1] = -1; // TODO(Subv): Find the right error code
+        return;
+    }
+
+    int ret = -1;
+    if (addr_len > 0) {
+        sockaddr dest_addr = CTRSockAddr::ToPlatform(*ctr_dest_addr);
+        ret = ::sendto(socket_handle, (const char*)input_buff, len, flags, &dest_addr, sizeof(dest_addr));
+    } else {
+        ret = ::sendto(socket_handle, (const char*)input_buff, len, flags, nullptr, 0);
+    }
+
+    int result = 0;
+    if (ret == SOCKET_ERROR_VALUE)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void RecvFrom(Service::Interface* self) {
+    // TODO(Subv): Calling this function on a blocking socket will block the emu thread, 
+    // preventing graceful shutdown when closing the emulator, this can be fixed by always 
+    // performing nonblocking operations and spinlock until the data is available
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    u32 len = cmd_buffer[2];
+    u32 flags = cmd_buffer[3];
+    socklen_t addr_len = static_cast<socklen_t>(cmd_buffer[4]);
+
+    u8* output_buff = Memory::GetPointer(cmd_buffer[0x104 >> 2]);
+    sockaddr src_addr;
+    socklen_t src_addr_len = sizeof(src_addr);
+    int ret = ::recvfrom(socket_handle, (char*)output_buff, len, flags, &src_addr, &src_addr_len);
+
+    if (cmd_buffer[0x1A0 >> 2] != 0) {
+        CTRSockAddr* ctr_src_addr = reinterpret_cast<CTRSockAddr*>(Memory::GetPointer(cmd_buffer[0x1A0 >> 2]));
+        *ctr_src_addr = CTRSockAddr::FromPlatform(src_addr);
+    }
+
+    int result = 0;
+    int total_received = ret;
+    if (ret == SOCKET_ERROR_VALUE) {
+        result = TranslateError(GET_ERRNO);
+        total_received = 0;
+    }
+
+    cmd_buffer[1] = result;
+    cmd_buffer[2] = ret;
+    cmd_buffer[3] = total_received;
+}
+
+static void Poll(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 nfds = cmd_buffer[1];
+    int timeout = cmd_buffer[2];
+    CTRPollFD* input_fds = reinterpret_cast<CTRPollFD*>(Memory::GetPointer(cmd_buffer[6]));
+    CTRPollFD* output_fds = reinterpret_cast<CTRPollFD*>(Memory::GetPointer(cmd_buffer[0x104 >> 2]));
+
+    // The 3ds_pollfd and the pollfd structures may be different (Windows/Linux have different sizes)
+    // so we have to copy the data
+    pollfd* platform_pollfd = new pollfd[nfds];
+    for (unsigned current_fds = 0; current_fds < nfds; ++current_fds)
+        platform_pollfd[current_fds] = CTRPollFD::ToPlatform(input_fds[current_fds]);
+    
+    int ret = ::poll(platform_pollfd, nfds, timeout);
+
+    // Now update the output pollfd structure
+    for (unsigned current_fds = 0; current_fds < nfds; ++current_fds)
+        output_fds[current_fds] = CTRPollFD::FromPlatform(platform_pollfd[current_fds]);
+
+    delete[] platform_pollfd;
+
+    int result = 0;
+    if (ret == SOCKET_ERROR_VALUE)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[1] = result;
+    cmd_buffer[2] = ret;
+}
+
+static void GetSockName(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    socklen_t ctr_len = cmd_buffer[2];
+
+    CTRSockAddr* ctr_dest_addr = reinterpret_cast<CTRSockAddr*>(Memory::GetPointer(cmd_buffer[0x104 >> 2]));
+
+    sockaddr dest_addr;
+    socklen_t dest_addr_len = sizeof(dest_addr);
+    int ret = ::getsockname(socket_handle, &dest_addr, &dest_addr_len);
+
+    if (ctr_dest_addr != nullptr) {
+        *ctr_dest_addr = CTRSockAddr::FromPlatform(dest_addr);
+    } else {
+        cmd_buffer[1] = -1; // TODO(Subv): Verify error
+        return;
+    }
+
+    int result = 0;
+    if (ret != 0)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void Shutdown(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    int how = cmd_buffer[2];
+
+    int ret = ::shutdown(socket_handle, how);
+    int result = 0;
+    if (ret != 0)
+        result = TranslateError(GET_ERRNO);
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void GetPeerName(Service::Interface* self) {
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    socklen_t len = cmd_buffer[2];
+
+    CTRSockAddr* ctr_dest_addr = reinterpret_cast<CTRSockAddr*>(Memory::GetPointer(cmd_buffer[0x104 >> 2]));
+    
+    sockaddr dest_addr;
+    socklen_t dest_addr_len = sizeof(dest_addr);
+    int ret = ::getpeername(socket_handle, &dest_addr, &dest_addr_len);
+
+    if (ctr_dest_addr != nullptr) {
+        *ctr_dest_addr = CTRSockAddr::FromPlatform(dest_addr);
+    } else {
+        cmd_buffer[1] = -1;
+        return;
+    }
+
+    int result = 0;
+    if (ret != 0)
+        result = TranslateError(GET_ERRNO);
+
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void Connect(Service::Interface* self) {
+    // TODO(Subv): Calling this function on a blocking socket will block the emu thread, 
+    // preventing graceful shutdown when closing the emulator, this can be fixed by always 
+    // performing nonblocking operations and spinlock until the data is available
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    u32 socket_handle = cmd_buffer[1];
+    socklen_t len = cmd_buffer[2];
+
+    CTRSockAddr* ctr_input_addr = reinterpret_cast<CTRSockAddr*>(Memory::GetPointer(cmd_buffer[6]));
+    if (ctr_input_addr == nullptr) {
+        cmd_buffer[1] = -1; // TODO(Subv): Verify error
+        return;
+    }
+
+    sockaddr input_addr = CTRSockAddr::ToPlatform(*ctr_input_addr);
+    int ret = ::connect(socket_handle, &input_addr, sizeof(input_addr));
+    int result = 0;
+    if (ret != 0)
+        result = TranslateError(GET_ERRNO);
+    cmd_buffer[2] = ret;
+    cmd_buffer[1] = result;
+}
+
+static void InitializeSockets(Service::Interface* self) {
+    // TODO(Subv): Implement
+#if EMU_PLATFORM == PLATFORM_WINDOWS
+    WSADATA data;
+    WSAStartup(MAKEWORD(2, 2), &data);
+#endif
+
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    cmd_buffer[1] = 0;
+}
+
+static void ShutdownSockets(Service::Interface* self) {
+    // TODO(Subv): Implement
+    CleanupSockets();
+
+#if EMU_PLATFORM == PLATFORM_WINDOWS
+    WSACleanup();
+#endif
+
+    u32* cmd_buffer = Kernel::GetCommandBuffer();
+    cmd_buffer[1] = 0;
+}
+
 const Interface::FunctionInfo FunctionTable[] = {
-    {0x00010044, nullptr,                       "InitializeSockets"},
+    {0x00010044, InitializeSockets,             "InitializeSockets"},
-    {0x000200C2, nullptr,                       "socket"},
+    {0x000200C2, Socket,                        "Socket"},
-    {0x00030082, nullptr,                       "listen"},
+    {0x00030082, Listen,                        "Listen"},
-    {0x00040082, nullptr,                       "accept"},
+    {0x00040082, Accept,                        "Accept"},
-    {0x00050084, nullptr,                       "bind"},
+    {0x00050084, Bind,                          "Bind"},
-    {0x00060084, nullptr,                       "connect"},
+    {0x00060084, Connect,                       "Connect"},
     {0x00070104, nullptr,                       "recvfrom_other"},
-    {0x00080102, nullptr,                       "recvfrom"},
+    {0x00080102, RecvFrom,                      "RecvFrom"},
     {0x00090106, nullptr,                       "sendto_other"},
-    {0x000A0106, nullptr,                       "sendto"},
+    {0x000A0106, SendTo,                        "SendTo"},
-    {0x000B0042, nullptr,                       "close"},
+    {0x000B0042, Close,                         "Close"},
-    {0x000C0082, nullptr,                       "shutdown"},
+    {0x000C0082, Shutdown,                      "Shutdown"},
-    {0x000D0082, nullptr,                       "gethostbyname"},
+    {0x000D0082, nullptr,                       "GetHostByName"},
-    {0x000E00C2, nullptr,                       "gethostbyaddr"},
+    {0x000E00C2, nullptr,                       "GetHostByAddr"},
     {0x000F0106, nullptr,                       "unknown_resolve_ip"},
-    {0x00110102, nullptr,                       "getsockopt"},
+    {0x00110102, nullptr,                       "GetSockOpt"},
-    {0x00120104, nullptr,                       "setsockopt"},
+    {0x00120104, nullptr,                       "SetSockOpt"},
-    {0x001300C2, nullptr,                       "fcntl"},
+    {0x001300C2, Fcntl,                         "Fcntl"},
-    {0x00140084, nullptr,                       "poll"},
+    {0x00140084, Poll,                          "Poll"},
-    {0x00150042, nullptr,                       "sockatmark"},
+    {0x00150042, nullptr,                       "SockAtMark"},
-    {0x00160000, nullptr,                       "gethostid"},
+    {0x00160000, GetHostId,                     "GetHostId"},
-    {0x00170082, nullptr,                       "getsockname"},
+    {0x00170082, GetSockName,                   "GetSockName"},
-    {0x00180082, nullptr,                       "getpeername"},
+    {0x00180082, GetPeerName,                   "GetPeerName"},
-    {0x00190000, nullptr,                       "ShutdownSockets"},
+    {0x00190000, ShutdownSockets,               "ShutdownSockets"},
     {0x001A00C0, nullptr,                       "GetNetworkOpt"},
     {0x001B0040, nullptr,                       "ICMPSocket"},
     {0x001C0104, nullptr,                       "ICMPPing"},
@@ -52,4 +724,11 @@ Interface::Interface() {
     Register(FunctionTable, ARRAY_SIZE(FunctionTable));
 }
 
+Interface::~Interface() {
+    CleanupSockets();
+#if EMU_PLATFORM == PLATFORM_WINDOWS
+    WSACleanup();
+#endif
+}
+
 } // namespace

src/core/hle/service/soc_u.h

@@ -14,6 +14,7 @@ namespace SOC_U {
 class Interface : public Service::Interface {
 public:
     Interface();
+    ~Interface();
 
     std::string GetPortName() const override {
         return "soc:U";

src/core/hle/svc.cpp

@@ -352,6 +352,18 @@ static s64 GetSystemTick() {
     return (s64)Core::g_app_core->GetTicks();
 }
 
+/// Creates a memory block at the specified address with the specified permissions and size
+static Result CreateMemoryBlock(Handle* memblock, u32 addr, u32 size, u32 my_permission,
+    u32 other_permission) {
+
+    // TODO(Subv): Implement this function
+
+    Handle shared_memory = Kernel::CreateSharedMemory();
+    *memblock = shared_memory;
+    LOG_WARNING(Kernel_SVC, "(STUBBED) called addr=0x%08X", addr);
+    return 0;
+}
+
 const HLE::FunctionDef SVC_Table[] = {
     {0x00, nullptr,                         "Unknown"},
     {0x01, HLE::Wrap<ControlMemory>,        "ControlMemory"},
@@ -383,7 +395,7 @@ const HLE::FunctionDef SVC_Table[] = {
     {0x1B, nullptr,                         "SetTimer"},
     {0x1C, nullptr,                         "CancelTimer"},
     {0x1D, nullptr,                         "ClearTimer"},
-    {0x1E, nullptr,                         "CreateMemoryBlock"},
+    {0x1E, HLE::Wrap<CreateMemoryBlock>,    "CreateMemoryBlock"},
     {0x1F, HLE::Wrap<MapMemoryBlock>,       "MapMemoryBlock"},
     {0x20, nullptr,                         "UnmapMemoryBlock"},
     {0x21, HLE::Wrap<CreateAddressArbiter>, "CreateAddressArbiter"},