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#ifndef _WIN32
#include <cstdlib>
#include <netdb.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include <fstream>
#include <iostream>
#include <string>
#include <cstring>
#include <srt.h>
using namespace std;
#ifndef _WIN32
void* sendfile(void*);
#else
DWORD WINAPI sendfile(LPVOID);
#endif
int main(int argc, char* argv[])
{
if ((2 < argc) || ((2 == argc) && (0 == atoi(argv[1]))))
{
cout << "usage: sendfile [server_port]" << endl;
return 0;
}
// Initialize the SRT library.
srt_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_DGRAM;
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;
}
SRTSOCKET serv = srt_create_socket();
// SRT requires that third argument is always SOCK_DGRAM. The Stream API is set by an option,
// although there's also lots of other options to be set, for which there's a convenience option,
// SRTO_TRANSTYPE.
SRT_TRANSTYPE tt = SRTT_FILE;
srt_setsockopt(serv, 0, SRTO_TRANSTYPE, &tt, sizeof tt);
// Windows UDP issue
// For better performance, modify HKLM\System\CurrentControlSet\Services\Afd\Parameters\FastSendDatagramThreshold
#ifdef _WIN32
int mss = 1052;
srt_setsockopt(serv, 0, SRTO_MSS, &mss, sizeof(int));
#endif
if (SRT_ERROR == srt_bind(serv, res->ai_addr, res->ai_addrlen))
{
cout << "bind: " << srt_getlasterror_str() << endl;
return 0;
}
freeaddrinfo(res);
cout << "server is ready at port: " << service << endl;
srt_listen(serv, 10);
sockaddr_storage clientaddr;
int addrlen = sizeof(clientaddr);
SRTSOCKET fhandle;
// Accept multiple client connections.
while (true)
{
if (SRT_INVALID_SOCK == (fhandle = srt_accept(serv, (sockaddr*)&clientaddr, &addrlen)))
{
cout << "accept: " << srt_getlasterror_str() << 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 SRTSOCKET(fhandle));
pthread_detach(filethread);
#else
CreateThread(NULL, 0, sendfile, new SRTSOCKET(fhandle), 0, NULL);
#endif
}
srt_close(serv);
// Signal to the SRT library to clean up all allocated sockets and resources.
srt_cleanup();
return 0;
}
#ifndef _WIN32
void* sendfile(void* usocket)
#else
DWORD WINAPI sendfile(LPVOID usocket)
#endif
{
SRTSOCKET fhandle = *(SRTSOCKET*)usocket;
delete (SRTSOCKET*)usocket;
// Acquiring file name information from client.
char file[1024];
int len;
if (SRT_ERROR == srt_recv(fhandle, (char*)&len, sizeof(int)))
{
cout << "recv: " << srt_getlasterror_str() << endl;
return 0;
}
if (SRT_ERROR == srt_recv(fhandle, file, len))
{
cout << "recv: " << srt_getlasterror_str() << endl;
return 0;
}
file[len] = '\0';
// Open the file only to know its size.
fstream ifs(file, ios::in | ios::binary);
ifs.seekg(0, ios::end);
const int64_t size = ifs.tellg();
ifs.close();
// Send file size.
if (SRT_ERROR == srt_send(fhandle, (char*)&size, sizeof(int64_t)))
{
cout << "send: " << srt_getlasterror_str() << endl;
return 0;
}
SRT_TRACEBSTATS trace;
srt_bstats(fhandle, &trace, true);
// Send the file itself.
int64_t offset = 0;
if (SRT_ERROR == srt_sendfile(fhandle, file, &offset, size, SRT_DEFAULT_SENDFILE_BLOCK))
{
cout << "sendfile: " << srt_getlasterror_str() << endl;
return 0;
}
srt_bstats(fhandle, &trace, true);
cout << "speed = " << trace.mbpsSendRate << "Mbits/sec" << endl;
const int64_t losspercent = 100 * trace.pktSndLossTotal / trace.pktSent;
cout << "network loss = " << trace.pktSndLossTotal << "pkts (" << losspercent << "%)\n";
srt_close(fhandle);
#ifndef _WIN32
return NULL;
#else
return 0;
#endif
}
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