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#ifndef WIN32
#include <cstdlib>
#include <netdb.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include <fstream>
#include <iostream>
#include <cstring>
#include <udt.h>
using namespace std;
#ifndef WIN32
void* sendfile(void*);
#else
DWORD WINAPI sendfile(LPVOID);
#endif
int main(int argc, char* argv[])
{
//usage: sendfile [server_port]
if ((2 < argc) || ((2 == argc) && (0 == atoi(argv[1]))))
{
cout << "usage: sendfile [server_port]" << endl;
return 0;
}
// use this function to initialize the UDT library
UDT::startup();
addrinfo hints;
addrinfo* res;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
string service("9000");
if (2 == argc)
service = argv[1];
if (0 != getaddrinfo(NULL, service.c_str(), &hints, &res))
{
cout << "illegal port number or port is busy.\n" << endl;
return 0;
}
UDTSOCKET serv = UDT::socket(res->ai_family, res->ai_socktype, res->ai_protocol);
// Windows UDP issue
// For better performance, modify HKLM\System\CurrentControlSet\Services\Afd\Parameters\FastSendDatagramThreshold
#ifdef WIN32
int mss = 1052;
UDT::setsockopt(serv, 0, UDT_MSS, &mss, sizeof(int));
#endif
if (UDT::ERROR == UDT::bind(serv, res->ai_addr, res->ai_addrlen))
{
cout << "bind: " << UDT::getlasterror().getErrorMessage() << endl;
return 0;
}
freeaddrinfo(res);
cout << "server is ready at port: " << service << endl;
UDT::listen(serv, 10);
sockaddr_storage clientaddr;
int addrlen = sizeof(clientaddr);
UDTSOCKET fhandle;
while (true)
{
if (UDT::INVALID_SOCK == (fhandle = UDT::accept(serv, (sockaddr*)&clientaddr, &addrlen)))
{
cout << "accept: " << UDT::getlasterror().getErrorMessage() << endl;
return 0;
}
char clienthost[NI_MAXHOST];
char clientservice[NI_MAXSERV];
getnameinfo((sockaddr *)&clientaddr, addrlen, clienthost, sizeof(clienthost), clientservice, sizeof(clientservice), NI_NUMERICHOST|NI_NUMERICSERV);
cout << "new connection: " << clienthost << ":" << clientservice << endl;
#ifndef WIN32
pthread_t filethread;
pthread_create(&filethread, NULL, sendfile, new UDTSOCKET(fhandle));
pthread_detach(filethread);
#else
CreateThread(NULL, 0, sendfile, new UDTSOCKET(fhandle), 0, NULL);
#endif
}
UDT::close(serv);
// use this function to release the UDT library
UDT::cleanup();
return 0;
}
#ifndef WIN32
void* sendfile(void* usocket)
#else
DWORD WINAPI sendfile(LPVOID usocket)
#endif
{
UDTSOCKET fhandle = *(UDTSOCKET*)usocket;
delete (UDTSOCKET*)usocket;
// aquiring file name information from client
char file[1024];
int len;
if (UDT::ERROR == UDT::recv(fhandle, (char*)&len, sizeof(int), 0))
{
cout << "recv: " << UDT::getlasterror().getErrorMessage() << endl;
return 0;
}
if (UDT::ERROR == UDT::recv(fhandle, file, len, 0))
{
cout << "recv: " << UDT::getlasterror().getErrorMessage() << endl;
return 0;
}
file[len] = '\0';
// open the file
fstream ifs(file, ios::in | ios::binary);
ifs.seekg(0, ios::end);
int64_t size = ifs.tellg();
ifs.seekg(0, ios::beg);
// send file size information
if (UDT::ERROR == UDT::send(fhandle, (char*)&size, sizeof(int64_t), 0))
{
cout << "send: " << UDT::getlasterror().getErrorMessage() << endl;
return 0;
}
UDT::TRACEINFO trace;
UDT::perfmon(fhandle, &trace);
// send the file
int64_t offset = 0;
if (UDT::ERROR == UDT::sendfile(fhandle, ifs, offset, size))
{
cout << "sendfile: " << UDT::getlasterror().getErrorMessage() << endl;
return 0;
}
UDT::perfmon(fhandle, &trace);
cout << "speed = " << trace.mbpsSendRate << "Mbits/sec" << endl;
UDT::close(fhandle);
ifs.close();
#ifndef WIN32
return NULL;
#else
return 0;
#endif
}
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