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#ifndef NODE_UWS_H
#define NODE_UWS_H
#include "Socket.h"
#include <vector>
#include <mutex>
namespace uS {
enum ListenOptions : int {
REUSE_PORT = 1,
ONLY_IPV4 = 2
};
class WIN32_EXPORT Node {
private:
template <void C(Socket *p, bool error)>
static void connect_cb(Poll *p, int status, int events) {
C((Socket *) p, status < 0);
}
template <void A(Socket *s)>
static void accept_poll_cb(Poll *p, int status, int events) {
ListenSocket *listenData = (ListenSocket *) p;
accept_cb<A, false>(listenData);
}
template <void A(Socket *s)>
static void accept_timer_cb(Timer *p) {
ListenSocket *listenData = (ListenSocket *) p->getData();
accept_cb<A, true>(listenData);
}
template <void A(Socket *s), bool TIMER>
static void accept_cb(ListenSocket *listenSocket) {
uv_os_sock_t serverFd = listenSocket->getFd();
Context *netContext = listenSocket->nodeData->netContext;
uv_os_sock_t clientFd = netContext->acceptSocket(serverFd);
if (clientFd == INVALID_SOCKET) {
/*
* If accept is failing, the pending connection won't be removed and the
* polling will cause the server to spin, using 100% cpu. Switch to a timer
* event instead to avoid this.
*/
if (!TIMER && !netContext->wouldBlock()) {
listenSocket->stop(listenSocket->nodeData->loop);
listenSocket->timer = new Timer(listenSocket->nodeData->loop);
listenSocket->timer->setData(listenSocket);
listenSocket->timer->start(accept_timer_cb<A>, 1000, 1000);
}
return;
} else if (TIMER) {
listenSocket->timer->stop();
listenSocket->timer->close();
listenSocket->timer = nullptr;
listenSocket->setCb(accept_poll_cb<A>);
listenSocket->start(listenSocket->nodeData->loop, listenSocket, UV_READABLE);
}
do {
SSL *ssl = nullptr;
if (listenSocket->sslContext) {
ssl = SSL_new(listenSocket->sslContext.getNativeContext());
SSL_set_accept_state(ssl);
}
Socket *socket = new Socket(listenSocket->nodeData, listenSocket->nodeData->loop, clientFd, ssl);
socket->setPoll(UV_READABLE);
A(socket);
} while ((clientFd = netContext->acceptSocket(serverFd)) != INVALID_SOCKET);
}
protected:
Loop *loop;
NodeData *nodeData;
std::recursive_mutex asyncMutex;
public:
Node(int recvLength = 1024, int prePadding = 0, int postPadding = 0, bool useDefaultLoop = false);
~Node();
void run();
Loop *getLoop() {
return loop;
}
template <uS::Socket *I(Socket *s), void C(Socket *p, bool error)>
Socket *connect(const char *hostname, int port, bool secure, NodeData *nodeData) {
Context *netContext = nodeData->netContext;
addrinfo hints, *result;
memset(&hints, 0, sizeof(addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if (getaddrinfo(hostname, std::to_string(port).c_str(), &hints, &result) != 0) {
return nullptr;
}
uv_os_sock_t fd = netContext->createSocket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (fd == INVALID_SOCKET) {
freeaddrinfo(result);
return nullptr;
}
::connect(fd, result->ai_addr, result->ai_addrlen);
freeaddrinfo(result);
SSL *ssl = nullptr;
if (secure) {
ssl = SSL_new(nodeData->clientContext);
SSL_set_connect_state(ssl);
SSL_set_tlsext_host_name(ssl, hostname);
}
Socket initialSocket(nodeData, getLoop(), fd, ssl);
uS::Socket *socket = I(&initialSocket);
socket->setCb(connect_cb<C>);
socket->start(loop, socket, socket->setPoll(UV_WRITABLE));
return socket;
}
// todo: hostname, backlog
template <void A(Socket *s)>
bool listen(const char *host, int port, uS::TLS::Context sslContext, int options, uS::NodeData *nodeData, void *user) {
addrinfo hints, *result;
memset(&hints, 0, sizeof(addrinfo));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
Context *netContext = nodeData->netContext;
if (getaddrinfo(host, std::to_string(port).c_str(), &hints, &result)) {
return true;
}
uv_os_sock_t listenFd = SOCKET_ERROR;
addrinfo *listenAddr;
if ((options & uS::ONLY_IPV4) == 0) {
for (addrinfo *a = result; a && listenFd == SOCKET_ERROR; a = a->ai_next) {
if (a->ai_family == AF_INET6) {
listenFd = netContext->createSocket(a->ai_family, a->ai_socktype, a->ai_protocol);
listenAddr = a;
}
}
}
for (addrinfo *a = result; a && listenFd == SOCKET_ERROR; a = a->ai_next) {
if (a->ai_family == AF_INET) {
listenFd = netContext->createSocket(a->ai_family, a->ai_socktype, a->ai_protocol);
listenAddr = a;
}
}
if (listenFd == SOCKET_ERROR) {
freeaddrinfo(result);
return true;
}
#ifdef __linux
#ifdef SO_REUSEPORT
if (options & REUSE_PORT) {
int optval = 1;
setsockopt(listenFd, SOL_SOCKET, SO_REUSEPORT, &optval, sizeof(optval));
}
#endif
#endif
int enabled = true;
setsockopt(listenFd, SOL_SOCKET, SO_REUSEADDR, &enabled, sizeof(enabled));
if (bind(listenFd, listenAddr->ai_addr, listenAddr->ai_addrlen) || ::listen(listenFd, 512)) {
netContext->closeSocket(listenFd);
freeaddrinfo(result);
return true;
}
ListenSocket *listenSocket = new ListenSocket(nodeData, loop, listenFd, nullptr);
listenSocket->sslContext = sslContext;
listenSocket->nodeData = nodeData;
listenSocket->setCb(accept_poll_cb<A>);
listenSocket->start(loop, listenSocket, UV_READABLE);
// should be vector of listen data! one group can have many listeners!
nodeData->user = listenSocket;
freeaddrinfo(result);
return false;
}
};
}
#endif // NODE_UWS_H
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