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// 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
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