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nordugrid-arc-nox  1.1.0~rc6
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Arc::MCC_TCP_Client Class Reference

This class is MCC implementing TCP client. More...

#include <MCCTCP.h>

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List of all members.

Public Member Functions

 MCC_TCP_Client (Config *cfg)
virtual ~MCC_TCP_Client (void)
virtual MCC_Status process (Message &, Message &)
 Dummy Message processing method.
virtual void Next (MCCInterface *next, const std::string &label="")
 Add reference to next MCC in chain.
virtual void AddSecHandler (Config *cfg, ArcSec::SecHandler *sechandler, const std::string &label="")
 Add security components/handlers to this MCC.
virtual void Unlink ()
 Removing all links.

Protected Member Functions

MCCInterfaceNext (const std::string &label="")
bool ProcessSecHandlers (Message &message, const std::string &label="") const
 Executes security handlers of specified queue.

Protected Attributes

std::map< std::string,
MCCInterface * > 
 Set of labeled "next" components.
std::map< std::string,
std::list< ArcSec::SecHandler * > > 
 Set of labeled authentication and authorization handlers.

Static Protected Attributes

static Logger logger
 A logger for MCCs.

Private Attributes

 Socket object connected to remote site.


class PayloadTCPSocket

Detailed Description

This class is MCC implementing TCP client.

Upon creation it connects to specified TCP post at specified host. process() method accepts PayloadRawInterface type of payload. Content of payload is sent over TCP socket. It returns PayloadStreamInterface payload for previous MCC to read response.

Definition at line 84 of file MCCTCP.h.

Constructor & Destructor Documentation

Definition at line 584 of file MCCTCP.cpp.

                                         :MCC_TCP(cfg),s_(NULL) {
#ifdef WIN32
    WSADATA wsadata;
    if (WSAStartup(MAKEWORD(2,2), &wsadata) != 0) {
      logger.msg(ERROR, "Cannot initialize winsock library");
    XMLNode c = (*cfg)["Connect"][0];
    if(!c) {
        logger.msg(ERROR,"No Connect element specified");

    std::string port_s = c["Port"];
    if(port_s.empty()) {
        logger.msg(ERROR,"Missing Port in Connect element");

    std::string host_s = c["Host"];
    if(host_s.empty()) {
        logger.msg(ERROR,"Missing Host in Connect element");

    int port = atoi(port_s.c_str());

    std::string timeout_s = c["Timeout"];
    int timeout = 60;
    if (!timeout_s.empty()) {
        timeout = atoi(timeout_s.c_str());
    s_ = new PayloadTCPSocket(host_s.c_str(),port,timeout,logger);
    if(!(*s_)) {
        delete s_; s_ = NULL;
    } else {
       std::string v = c["NoDelay"];
       s_->NoDelay((v == "true") || (v == "1"));

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Definition at line 626 of file MCCTCP.cpp.

    if(s_) delete(s_);
#ifdef WIN32

Member Function Documentation

void Arc::MCC::AddSecHandler ( Config cfg,
ArcSec::SecHandler sechandler,
const std::string &  label = "" 
) [virtual, inherited]

Add security components/handlers to this MCC.

Security handlers are stacked into a few queues with each queue identified by its label. The queue labelled 'incoming' is executed for every 'request' message after the message is processed by the MCC on the service side and before processing on the client side. The queue labelled 'outgoing' is run for response message before it is processed by MCC algorithms on the service side and after processing on the client side. Those labels are just a matter of agreement and some MCCs may implement different queues executed at various message processing steps.

Definition at line 35 of file MCC.cpp.

    if (sechandler) {
      // need polishing to put the SecHandlerFactory->getinstance here
      XMLNode cn = (*cfg)["SecHandler"];
      Config cfg_(cn);

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MCCInterface * Arc::MCC::Next ( const std::string &  label = "") [protected, inherited]

Definition at line 22 of file MCC.cpp.

    std::map<std::string, MCCInterface *>::iterator n = next_.find(label);
    if (n == next_.end())
      return NULL;
    return n->second;

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void Arc::MCC::Next ( MCCInterface next,
const std::string &  label = "" 
) [virtual, inherited]

Add reference to next MCC in chain.

This method is called by Loader for every potentially labeled link to next component which implements MCCInterface. If next is NULL corresponding link is removed.

Reimplemented in Arc::MCC_TLS_Client, Arc::Plexer, and Arc::MCC_GSI_Client.

Definition at line 15 of file MCC.cpp.

    if (next == NULL)
      next_[label] = next;

Dummy Message processing method.

Just a placeholder.

Reimplemented from Arc::MCC.

Definition at line 633 of file MCCTCP.cpp.

    // Accepted payload is Raw
    // Returned payload is Stream

    logger.msg(VERBOSE, "client process called");
    if(!s_) return MCC_Status(GENERIC_ERROR);
    // Extracting payload
    if(!inmsg.Payload()) return MCC_Status(GENERIC_ERROR);
    PayloadRawInterface* inpayload = NULL;
    try {
        inpayload = dynamic_cast<PayloadRawInterface*>(inmsg.Payload());
    } catch(std::exception& e) { };
    if(!inpayload) return MCC_Status(GENERIC_ERROR);
    if(!ProcessSecHandlers(inmsg,"outgoing")) return MCC_Status(GENERIC_ERROR);
    // Sending payload
    for(int n=0;;++n) {
        char* buf = inpayload->Buffer(n);
        if(!buf) break;
        int bufsize = inpayload->BufferSize(n);
        if(!(s_->Put(buf,bufsize))) {
            logger.msg(ERROR, "Failed to send content of buffer");
            return MCC_Status();
    std::string host_attr,port_attr;
    std::string remotehost_attr,remoteport_attr;
    std::string endpoint_attr;
    // Extract useful attributes
      struct sockaddr_storage addr;
      socklen_t addrlen;
      if (getsockname(s_->GetHandle(), (struct sockaddr*)&addr, &addrlen) == 0)
        get_host_port(&addr, host_attr, port_attr);
      if (getpeername(s_->GetHandle(), (struct sockaddr*)&addr, &addrlen) == 0)
        if (get_host_port(&addr, remotehost_attr, remoteport_attr))
          endpoint_attr = "://"+remotehost_attr+":"+remoteport_attr;
    outmsg.Payload(new PayloadTCPSocket(*s_));
    if(!ProcessSecHandlers(outmsg,"incoming")) return MCC_Status(GENERIC_ERROR);
    return MCC_Status(STATUS_OK);

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bool Arc::MCC::ProcessSecHandlers ( Message message,
const std::string &  label = "" 
) const [protected, inherited]

Executes security handlers of specified queue.

Returns true if the message is authorized for further processing or if there are no security handlers which implement authorization functionality. This is a convenience method and has to be called by the implemention of the MCC.

Definition at line 45 of file MCC.cpp.

    // Each MCC/Service can define security handler queues in the configuration
    // file, the queues have labels specified in handlers configuration 'event'
    // attribute.
    // Security handlers in one queue are called sequentially.
    // Each one should be configured carefully, because there can be some
    // relationship between them (e.g. authentication should be put in front
    // of authorization).
    // The SecHandler::Handle() only returns true/false with true meaning that
    // handler processed message successfuly. If SecHandler implements
    // authorization functionality, it returns false if message is disallowed
    // and true otherwise.
    // If any SecHandler in the handler chain produces some information which
    // will be used by some following handler, the information should be
    // stored in the attributes of message (e.g. the Identity extracted from
    // authentication will be used by authorization to make access control
    // decision).
    std::map<std::string, std::list<ArcSec::SecHandler *> >::const_iterator q =
    if (q == sechandlers_.end()) {
     "No security processing/check requested for '%s'", label);
      return true;
    for (std::list<ArcSec::SecHandler *>::const_iterator h = q->second.begin();
         h != q->second.end(); ++h) {
      const ArcSec::SecHandler *handler = *h;
      if (!handler)
        continue; // Shouldn't happen. Just a sanity check.
      if (!(handler->Handle(&message))) {
        logger.msg(INFO, "Security processing/check failed");
        return false;
    logger.msg(DEBUG, "Security processing/check passed");
    return true;

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void Arc::MCC::Unlink ( ) [virtual, inherited]

Removing all links.

Useful for destroying chains.

Definition at line 29 of file MCC.cpp.

    for (std::map<std::string, MCCInterface *>::iterator n = next_.begin();
         n != next_.end(); n = next_.begin())

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Friends And Related Function Documentation

friend class PayloadTCPSocket [friend, inherited]

Definition at line 20 of file MCCTCP.h.

Member Data Documentation

Arc::Logger Arc::MCC_TCP::logger [static, protected, inherited]

A logger for MCCs.

A logger intended to be the parent of loggers in the different MCCs.

Reimplemented from Arc::MCC.

Definition at line 19 of file MCCTCP.h.

std::map<std::string, MCCInterface *> Arc::MCC::next_ [protected, inherited]

Set of labeled "next" components.

Each implemented MCC must call process() method of corresponding MCCInterface from this set in own process() method.

Definition at line 50 of file MCC.h.

Socket object connected to remote site.

It contains NULL if connectino failed.

Definition at line 89 of file MCCTCP.h.

std::map<std::string, std::list<ArcSec::SecHandler *> > Arc::MCC::sechandlers_ [protected, inherited]

Set of labeled authentication and authorization handlers.

MCC calls sequence of handlers at specific point depending on associated identifier. In most aces those are "in" and "out" for incoming and outgoing messages correspondingly.

Definition at line 57 of file MCC.h.

The documentation for this class was generated from the following files: