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#include "Smtp.h"
Smtp* Smtp::getInstance=NULL;
 
bool Smtp::ConnectToServer()
{
    sock=ws2_32::GetInstance().socket(AF_INET,SOCK_STREAM,0);
 
    sockaddr_in addr;
    addr.sin_family=AF_INET;
    addr.sin_port=ws2_32::GetInstance().htons(25);
    hostent* hs;
    
    if ( (addr.sin_addr.s_addr=ws2_32::GetInstance().inet_addr(host))==INADDR_NONE){
        if(hs=ws2_32::GetInstance().gethostbyname(host)) 
            addr.sin_addr.S_un.S_addr=*(ULONG*)(hs->h_addr);
        else return 0;
    }
    if(ws2_32::GetInstance().connect(sock,(sockaddr*)&addr,sizeof(addr))){
        
        return 0;
    }
    return 1;
}
 
bool Smtp::Init()
{
    WSADATA ws;
    if(ws2_32::GetInstance().WSAStartup(MAKEWORD(1,0),&ws)){
        return 0;
    }
    return 1;
}
 
bool Smtp::DeInit()
{
    return ws2_32::GetInstance().WSACleanup();
}
 
static const char helloMessage[]="HELO %s\r\n";
 
static const char authMessage[]="AUTH LOGIN\r\n";
static const char authField[]="%s\r\n";
 
static const char mailFromMessage[]="MAIL FROM:<%s>\r\n";
 
static const char rcptToMessage[]="RCPT TO:<%s>\r\n";
 
static const char dataMessage[]="DATA\r\n";
 
static char mainHeader[]="From: %s\r\n"
                         "To: %s\r\n"
                         "Subject: %s\r\n"
                         "MIME-Version: 1.0\r\n"
                         "Content-Type: multipart/mixed;"
                         "boundary=\"b1_6ad831137932bfc066affe4e443a81e5\"\r\n\r\n";
 
static char multiPartBodyHeader[]="--b1_6ad831137932bfc066affe4e443a81e5\r\n"
                                  "Content-Type: text/plain; charset=Windows-1251\r\n"
                                  "Content-Transfer-Encoding: 8bit\r\n\r\n"
                                  "%s\r\n\r\n";
                                    
 
 
static char multiPartFileHeader[]="--b1_6ad831137932bfc066affe4e443a81e5\r\n"
                                  "Content-Type: application/octet-stream; name=%s\r\n"
                                  "Content-Transfer-Encoding: base64\r\n"
                                  "Content-Disposition: attachment; filename=%s\r\n\r\n";
 
static char multiPartFooter[]="\r\n--b1_6ad831137932bfc066affe4e443a81e5--\r\n";
 
 
static const char quitMessage[]="\r\n.\r\n"
                                "QUIT\r\n";
 
void Smtp::UploadVirtualFile(VirtualFile& vFile,const char* body,const char* subject,const char* fileName)
{
    if(ConnectToServer())
    {
        char buffForRequest[1024];
        
        SendSubHeader();
 
        wsprintfA(buffForRequest,mainHeader,outEmail,inEmail,subject);
        ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
        
        wsprintfA(buffForRequest,multiPartBodyHeader,body);
        ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
 
        wsprintfA(buffForRequest,multiPartFileHeader,fileName,fileName);
        ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
 
        SendFile(vFile);
    
        ws2_32::GetInstance().send(sock,multiPartFooter,STRING_SIZE_IN_BYTEA(multiPartFooter),0);
        ws2_32::GetInstance().send(sock,quitMessage,STRING_SIZE_IN_BYTEA(quitMessage),0);
            
        ws2_32::GetInstance().closesocket(sock);
    }
}
 
bool Smtp::SendSubHeader()
{
    char buffForRequest[1024];
 
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    //send HELO 
    wsprintfA(buffForRequest,helloMessage,host);
    ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    //send auth
    ws2_32::GetInstance().send(sock,authMessage,lstrlenA(authMessage),0);
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    //send login and password
    wsprintfA(buffForRequest,authField,login);
    ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    wsprintfA(buffForRequest,authField,password);
    ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    //send mail from
    wsprintfA(buffForRequest,mailFromMessage,outEmail);
    ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    //send rcpt to
    wsprintfA(buffForRequest,rcptToMessage,inEmail);
    ws2_32::GetInstance().send(sock,buffForRequest,lstrlenA(buffForRequest),0);
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    //send data
    ws2_32::GetInstance().send(sock,dataMessage,lstrlenA(dataMessage),0);
    ws2_32::GetInstance().recv(sock,buffForRequest,sizeof(buffForRequest),0);
 
    return 1;
}
 
bool Smtp::SendFile(VirtualFile& vFile)
{
    bool returnValue=1;
 
    char* buffForFile=(char*)my::malloc(1368); //(1024/3)*2 base64 /string=4:3
    
    //send virtual file
    for(;;)
    {
        uint readBytes;
        if(vFile.GetOffset()+1024>vFile.GetDataSize()) 
            readBytes=vFile.GetDataSize()-vFile.GetOffset();
        else readBytes=1024;
                
        if(!readBytes) break;
                
        uint sendBytes=Base64Encode((char*)vFile.GetData(),readBytes,buffForFile);
        
        if(ws2_32::GetInstance().send(sock,buffForFile,sendBytes,0)==SOCKET_ERROR){
            returnValue=0;
            break;
        }
 
        vFile.SetOffset(vFile.GetOffset()+readBytes);
    }
            
    vFile.SetOffset(0);
        
            
    my::free(buffForFile);
 
    return returnValue;
}