C++ 单流上的Sctp文件（png）传输
我目前正在为Linux开发一个需要通过一个流发送文件的SCTP服务器-客户端对。这是因为其他流将用于发送命令、遥测等。如果有帮助的话，我正在使用QtCreator。为此，我需要使用SCTP。从现在起，服务器和客户端作为单独的应用程序在本地端口上运行C++ 单流上的Sctp文件（png）传输,c++,linux,sockets,png,sctp,C++,Linux,Sockets,Png,Sctp,我目前正在为Linux开发一个需要通过一个流发送文件的SCTP服务器-客户端对。这是因为其他流将用于发送命令、遥测等。如果有帮助的话，我正在使用QtCreator。为此，我需要使用SCTP。从现在起，服务器和客户端作为单独的应用程序在本地端口上运行 /* * Client (Recieving Side) */ //creates a file if it isn't there std::ofstream file("write.png"); //instantiates ofstream s
/*
* Client (Recieving Side)
*/
//creates a file if it isn't there
std::ofstream file("write.png");
//instantiates ofstream
std::ofstream ofs;
//opens the file using binary, I've tried it with "| std::ios::out" too
ofs.open ("write.png", std::ios::binary);
//tried different buffer sizes, same results, currently set at 512
char inBuffer[MAX_BUFFER+1];
while(error != -1){
memset(inBuffer, 0, MAX_BUFFER+1);
in = sctp_recvmsg( connSock, (void *)inBuffer
, sizeof(inBuffer), (struct sockaddr *)NULL, 0
, &sndrcvinfo, &flags);
if( in != -1 && sndrcvinfo.sinfo_stream == 3){
//writes the buffer to the file every time it recieves
//I've tried changing the pointers around,
//also tried using sizeof() instead of strlen()
//this changed the results, nothing worked so far
ofs.write((char *)&inBuffer, strlen(inBuffer));
//sends a handhake message (stored in s_buffer) to server
snd_ret = sctp_sendmsg( connSock, (void *)s_buffer
,(size_t)strlen(s_buffer)
,NULL, 0, 0, 0, 4, 0, 0 );
}
}
/*
*Server (Sending side):
*/
std::ifstream inFile("/home/username/test.png", std::ios::binary);
char buf[MAX_BUFFER+1];
while(inFile.read((char *)buf,sizeof(buf)))
{
//Sends the current buffer over stream 3
snd_ret = sctp_sendmsg( goodSock, (void *)buf, (size_t)strlen(buf),
NULL, 0, 0, 0, 3, 0, 0 );
/*
* in another thread there is a loop that receives messages
* the client side sends a message whenever it receives
* this ensures the data was sent and waits before sending more.
*/
while(confirmHandshake == false){/*...*/}
//delays so I can view and compare console outputs for debugging
std::this_thread::sleep_for(std::chrono::milliseconds(200));
}
/*
* Client (Recieving Side)
*/
//creates a file if it isn't there
std::ofstream file("write.png");
//instantiates ofstream
std::ofstream ofs;
//opens the file using binary, I've tried it with "| std::ios::out" too
ofs.open ("write.png", std::ios::binary);
//tried different buffer sizes, same results, currently set at 512
char inBuffer[MAX_BUFFER+1];
while(error != -1){
memset(inBuffer, 0, MAX_BUFFER+1);
in = sctp_recvmsg( connSock, (void *)inBuffer
, sizeof(inBuffer), (struct sockaddr *)NULL, 0
, &sndrcvinfo, &flags);
if( in != -1 && sndrcvinfo.sinfo_stream == 3){
//writes the buffer to the file every time it recieves
//I've tried changing the pointers around,
//also tried using sizeof() instead of strlen()
//this changed the results, nothing worked so far
ofs.write((char *)&inBuffer, strlen(inBuffer));
//sends a handhake message (stored in s_buffer) to server
snd_ret = sctp_sendmsg( connSock, (void *)s_buffer
,(size_t)strlen(s_buffer)
,NULL, 0, 0, 0, 4, 0, 0 );
}
}