What means a result of 0x000000be in send command:
iResult = send( ConnectSocket, dataToSend, (int) strlen(dataToSend), 0 );
I didn't found this return code here: http://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx
Any ideas?
Thx
The value returned by send is the number of bytes it sent. If it fails it returns SOCKET_ERROR and you use WSAGetLastError to get the error code, which is the codes listed in your link. Read the manual page for send instead.
Related
I am using https://github.com/dhbaird/easywsclient
The following code wont connect properly, ws comes back as a NULL always and the connection "stucks".
using easywsclient::WebSocket;
ws = WebSocket::from_url("ws://mysite.net:80/app/");
assert(ws);
I tried debuggin it and at easywsclient.cpp (github link above) line 514 (code below) gives really weird values for "status" and this is where it fails it seems. I can't figure out why this is happening, the webapp works fine in my browser
if (sscanf(line, "HTTP/1.1 %d", &status) != 1 || status != 101) { fprintf(stderr, "ERROR: Got bad status connecting to %s: %s and status is %d", url.c_str(), line, status); return NULL; }
This is somewhat new terrority to me so I clearly am not understanding something. Any help is appreciated, thanks!
I want to build an stmp client using c++ for learning purposes.
After I managed to implement the initial connection + auth login I am stuck on sending the message after using the data command.
Here is my code
void sendmail()
{
write_command("MAIL FROM: <foo#bar.de>");
write_command("RCPT TO: <bar.foo#baz.de>");
write_command("DATA");
write_command("Subject: testmail"); // HANGS here after data command
write_command("BlaBlub");
write_command(" ");
write_command(".");
write_command("QUIT");
}
void write_command(std::string command)
{
ssize_t n;
empty_buffer();
command += '\r';
command += '\n';
char command_buffer[255];
strcpy(command_buffer, command.c_str());
n = write(sockfd,command_buffer,strlen(command_buffer));
if (n < 0){
error("ERROR writing to socket");
}
n = read_to_buffer();
if (n < 0) {
error("ERROR reading from socket");
}
printf("%s\n",this->buffer);
}
I'm using smtp.mailtrap.io on port 25.
Here is a gist with the full class https://gist.github.com/xhallix/7f2d87a8b2eab4953d161059c2482b37
Here is the server output
Starting smpt client
220 mailtrap.io ESMTP ready
250-mailtrap.io
250-SIZE 5242880
250-PIPELINING
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-AUTH PLAIN LOGIN CRAM-MD5
250 STARTTLS
334 VXNlcm5hbWU6
334 UGFzc3dvcmQ6
235 2.0.0 OK
250 2.1.0 Ok
250 2.1.0 Ok
354 Go ahead
(HANGS HERE)
Thanks for helping me out
DATA command expects the whole mail message, as shown here. The write_command() sends a message by lines and expects response after each line. Since the server returns the response once the mail message is finished (after empty line and dot), it stays in the hanging mode after the first message line. This code snippet can be helpful for your case.
BTW, you should put an empty line between the mail header and body, which I guess is after the subject line. Also, it might happen that the server rejects the message without the From and To headers.
I have a socket where I set a timeout for recv().
I have two steps for recv(), first I check content of received data if complete using MSG_PEEK | MSG_DONTWAIT.
recvTimeout.tv_sec = mRecvTimeoutSecs;
recvTimeout.tv_usec = mRecvTimeoutUSecs;
sendTimeout.tv_sec = mSendTimeoutSecs;
sendTimeout.tv_usec = mSendTimeoutUSecs;
result = enableSocketOption(SOL_SOCKET, SO_RCVTIMEO, &recvTimeout, sizeof(recvTimeout));
peekdLen = ::recv(mSocket, peekDataBuffer, MAX_RECV_LENGTH, MSG_PEEK | MSG_DONTWAIT);
I'm just thinking if recv() will timeout if I used MSG_PEEK | MSG_DONTWAIT.
No, the socket will not timeout, as MSG_DONTWAIT will cause recv() to return immediately. Note that if you set like 1 msec timeout, then it might timeout - that would depend on the implementation (on which OS your code runs on).
I am trying to connect to FTP server using WinGate FTP Proxy. The InternetOpen() executes successfully returning appropriate handle in all cases.
In case Proxy Authentication is OFF, InternetConnect() returns proper handle and I can proceed with further ftp operations but in case Proxy Authentication is ON, InternetConnect() returns NULL.
On MSDN they have mentioned for proxies use InternetSetOption() with INTERNET_OPTION_PROXY_USERNAME and INTERNET_OPTION_PROXY_PASSWORD flags to set proxy username and password on handle returned by InternetConnect, but it's returning NULL and on printing GetLastError(), I get the following message:
InternetConnect failed: 12014
220 WinGate Engine FTP Gateway ready
331 send password
530 Auth Failed
if ((hHandle=InternetOpen("Upload", INTERNET_OPEN_TYPE_PROXY, "ftp=ftp://<servername>:<port>", NULL, 0)) == NULL)
{
printf("InternetOpen failed: %d", GetLastError());
printInternetErrorMsg(function);
return false;
}
char buffer[1024];
string proxy_username,proxy_password;
// get ftp proxy username and password
// ..
if ((m_itConnect=InternetConnect(hHandle, ftpserver, INTERNET_DEFAULT_FTP_PORT, ftpusrname, ftppasswd, INTERNET_SERVICE_FTP, NULL, NULL)) == NULL){
printf("InternetConnect failed: %d", GetLastError());
printInternetErrorMsg(function);
//Internet Connect Fails with following error when Proxy Authentication is ON
//InternetConnect failed: 12014
//220 WinGate Engine FTP Gateway ready
//331 send password
//530 Auth Failed
return false;
}
strcpy(buffer,proxy_username.c_str());
if ( !InternetSetOption (m_itConnect, INTERNET_OPTION_PROXY_USERNAME, (LPVOID) buffer, lstrlen (buffer) ))
{
printf("Unable to set proxy authetication settings (username). Error returned: %d", GetLastError() );
return false;
}
strcpy(buffer, proxy_password.c_str());
if ( !InternetSetOption (m_itConnect, INTERNET_OPTION_PROXY_PASSWORD, (LPVOID) buffer, lstrlen (buffer) ))
{
printf("Unable to set proxy authetication settings (password). Error returned: %d", GetLastError() );
return false;
}
}
printf("InternetConnect successful ...");
return true;
Any help is appreciated.
Thanks in Advance.
the problem is you are connecting to an FTP proxy, rather than an HTTP proxy. So you're getting an FTP welcome string back.
When working through a proxy using WinInet, FTP is done over HTTP. The client makes an HTTP request to the HTTP proxy for an FTP URL. the HTTP proxy acts as an FTP client to the FTP server, and translates the response back to HTTP for the client. Strange but true.
So you need to change the proxy port to be the HTTP proxy in WinGate.
I am writing a IRC client in C++ (with the help of the SFML library), but it is behaving strangely. I send the NICK and USER commands and I can connect to the server, but the JOIN command has many strange thing happening that I have to write "Random code that magically works" to solve. I am pretty sure that the commands adhere to the IRC RFC as well.
I know that the sockets are sending what they are supposed to send and I have verified it with Wireshark, so what I post here is what the message of the packet is. In the following examples the socket is already connected to the IRC server (which in this case is irc.freenode.net)
This works:
char mess[] ="NICK lmno \n\rUSER lmno 0 * :lmno\n\rJOIN #mytest\n\r";
Socket.Send(mess, sizeof(mess));
This does not:
char msg[] = "NICK lmno \r\nUSER lmno 0 * :lmno \r\n";
char msga[] = "JOIN #mytest \r\n";
Socket.Send(msg, sizeof(msg));
Socket.Send(msga, sizeof(msga));
But curiously this works:
char msg[] = "NICK lmno \r\nUSER lmno 0 * :lmno \r\n";
char msga[] = "JOIN #mytest \r\n";
Socket.Send(msg, sizeof(msg));
Socket.Send(msga, sizeof(msga));
Socket.Send(msga, sizeof(msga));
I did do some research on this topic and no one seems to have the same problem. Stranger is that when I tried this in telnet, I only have to send JOIN once.
Is anyone able to give me some advice?
Thanks,
SFI
It might have to do with the terminating '\0' character at the end of a c-string. Try
Socket.Send(msg, sizeof(msg) - 1);
Socket.Send(msga, sizeof(msga) - 1);