Electron desktop client added

Electron Client/node_modules/uws/src/Networking.h

@@ -0,0 +1,259 @@
+// the purpose of this header should be to provide SSL and networking wrapped in a common interface
+// it should allow cross-platform networking and SSL and also easy usage of mTCP and similar tech
+
+#ifndef NETWORKING_UWS_H
+#define NETWORKING_UWS_H
+
+#include <openssl/opensslv.h>
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#define SSL_CTX_up_ref(x) x->references++
+#define SSL_up_ref(x) x->references++
+#endif
+
+#ifndef __linux
+#define MSG_NOSIGNAL 0
+#else
+#include <endian.h>
+#endif
+
+#ifdef __APPLE__
+#include <libkern/OSByteOrder.h>
+#define htobe64(x) OSSwapHostToBigInt64(x)
+#define be64toh(x) OSSwapBigToHostInt64(x)
+#endif
+
+#ifdef _WIN32
+#define NOMINMAX
+#include <WinSock2.h>
+#include <Ws2tcpip.h>
+#pragma comment(lib, "ws2_32.lib")
+#define SHUT_WR SD_SEND
+#ifdef __MINGW32__
+// Windows has always been tied to LE
+#define htobe64(x) __builtin_bswap64(x)
+#define be64toh(x) __builtin_bswap64(x)
+#else
+#define __thread __declspec(thread)
+#define htobe64(x) htonll(x)
+#define be64toh(x) ntohll(x)
+#define pthread_t DWORD
+#define pthread_self GetCurrentThreadId
+#endif
+#define WIN32_EXPORT __declspec(dllexport)
+
+inline void close(SOCKET fd) {closesocket(fd);}
+inline int setsockopt(SOCKET fd, int level, int optname, const void *optval, socklen_t optlen) {
+    return setsockopt(fd, level, optname, (const char *) optval, optlen);
+}
+
+inline SOCKET dup(SOCKET socket) {
+    WSAPROTOCOL_INFOW pi;
+    if (WSADuplicateSocketW(socket, GetCurrentProcessId(), &pi) == SOCKET_ERROR) {
+        return INVALID_SOCKET;
+    }
+    return WSASocketW(pi.iAddressFamily, pi.iSocketType, pi.iProtocol, &pi, 0, WSA_FLAG_OVERLAPPED);
+}
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <cstring>
+#define SOCKET_ERROR -1
+#define INVALID_SOCKET -1
+#define WIN32_EXPORT
+#endif
+
+#include "Backend.h"
+#include <openssl/ssl.h>
+#include <csignal>
+#include <vector>
+#include <string>
+#include <mutex>
+#include <algorithm>
+#include <memory>
+
+namespace uS {
+
+// todo: mark sockets nonblocking in these functions
+// todo: probably merge this Context with the TLS::Context for same interface for SSL and non-SSL!
+struct Context {
+
+#ifdef USE_MTCP
+    mtcp_context *mctx;
+#endif
+
+    Context() {
+        // mtcp_create_context
+#ifdef USE_MTCP
+        mctx = mtcp_create_context(0); // cpu index?
+#endif
+    }
+
+    ~Context() {
+#ifdef USE_MTCP
+        mtcp_destroy_context(mctx);
+#endif
+    }
+
+    // returns INVALID_SOCKET on error
+    uv_os_sock_t acceptSocket(uv_os_sock_t fd) {
+        uv_os_sock_t acceptedFd;
+#if defined(SOCK_CLOEXEC) && defined(SOCK_NONBLOCK)
+        // Linux, FreeBSD
+        acceptedFd = accept4(fd, nullptr, nullptr, SOCK_CLOEXEC | SOCK_NONBLOCK);
+#else
+        // Windows, OS X
+        acceptedFd = accept(fd, nullptr, nullptr);
+#endif
+
+#ifdef __APPLE__
+        if (acceptedFd != INVALID_SOCKET) {
+            int noSigpipe = 1;
+            setsockopt(acceptedFd, SOL_SOCKET, SO_NOSIGPIPE, &noSigpipe, sizeof(int));
+        }
+#endif
+        return acceptedFd;
+    }
+
+    // returns INVALID_SOCKET on error
+    uv_os_sock_t createSocket(int domain, int type, int protocol) {
+        int flags = 0;
+#if defined(SOCK_CLOEXEC) && defined(SOCK_NONBLOCK)
+        flags = SOCK_CLOEXEC | SOCK_NONBLOCK;
+#endif
+
+        uv_os_sock_t createdFd = socket(domain, type | flags, protocol);
+
+#ifdef __APPLE__
+        if (createdFd != INVALID_SOCKET) {
+            int noSigpipe = 1;
+            setsockopt(createdFd, SOL_SOCKET, SO_NOSIGPIPE, &noSigpipe, sizeof(int));
+        }
+#endif
+
+        return createdFd;
+    }
+
+    void closeSocket(uv_os_sock_t fd) {
+#ifdef _WIN32
+        closesocket(fd);
+#else
+        close(fd);
+#endif
+    }
+
+    bool wouldBlock() {
+#ifdef _WIN32
+        return WSAGetLastError() == WSAEWOULDBLOCK;
+#else
+        return errno == EWOULDBLOCK;// || errno == EAGAIN;
+#endif
+    }
+};
+
+namespace TLS {
+
+class WIN32_EXPORT Context {
+private:
+    SSL_CTX *context = nullptr;
+    std::shared_ptr<std::string> password;
+
+    static int passwordCallback(char *buf, int size, int rwflag, void *u)
+    {
+        std::string *password = (std::string *) u;
+        int length = std::min<int>(size, password->length());
+        memcpy(buf, password->data(), length);
+        buf[length] = '\0';
+        return length;
+    }
+
+public:
+    friend Context WIN32_EXPORT createContext(std::string certChainFileName, std::string keyFileName, std::string keyFilePassword);
+    Context(SSL_CTX *context) : context(context) {
+
+    }
+
+    Context() = default;
+    Context(const Context &other);
+    Context &operator=(const Context &other);
+    ~Context();
+    operator bool() {
+        return context;
+    }
+
+    SSL_CTX *getNativeContext() {
+        return context;
+    }
+};
+
+Context WIN32_EXPORT createContext(std::string certChainFileName, std::string keyFileName, std::string keyFilePassword = std::string());
+
+}
+
+struct Socket;
+
+// NodeData is like a Context, maybe merge them?
+struct WIN32_EXPORT NodeData {
+    char *recvBufferMemoryBlock;
+    char *recvBuffer;
+    int recvLength;
+    Loop *loop;
+    uS::Context *netContext;
+    void *user = nullptr;
+    static const int preAllocMaxSize = 1024;
+    char **preAlloc;
+    SSL_CTX *clientContext;
+
+    Async *async = nullptr;
+    pthread_t tid;
+
+    std::recursive_mutex *asyncMutex;
+    std::vector<Poll *> transferQueue;
+    std::vector<Poll *> changePollQueue;
+    static void asyncCallback(Async *async);
+
+    static int getMemoryBlockIndex(size_t length) {
+        return (length >> 4) + bool(length & 15);
+    }
+
+    char *getSmallMemoryBlock(int index) {
+        if (preAlloc[index]) {
+            char *memory = preAlloc[index];
+            preAlloc[index] = nullptr;
+            return memory;
+        } else {
+            return new char[index << 4];
+        }
+    }
+
+    void freeSmallMemoryBlock(char *memory, int index) {
+        if (!preAlloc[index]) {
+            preAlloc[index] = memory;
+        } else {
+            delete [] memory;
+        }
+    }
+
+public:
+    void addAsync() {
+        async = new Async(loop);
+        async->setData(this);
+        async->start(NodeData::asyncCallback);
+    }
+
+    void clearPendingPollChanges(Poll *p) {
+        asyncMutex->lock();
+        changePollQueue.erase(
+            std::remove(changePollQueue.begin(), changePollQueue.end(), p),
+            changePollQueue.end()
+        );
+        asyncMutex->unlock();
+    }
+};
+
+}
+
+#endif // NETWORKING_UWS_H