void UPAProvider::CreateNewClientConnection()
{
// find the first free client session
int nextIndex = -1;
for(int index = 0; index < maxClientConnections; index ++)
{
if (clientConnections_[index].clientChannel == 0)
{
nextIndex = index;
break;
}
}
RsslAcceptOptions acceptOpts = RSSL_INIT_ACCEPT_OPTS;
if (nextIndex == -1)
{
// need to fails the connection request
acceptOpts.nakMount = RSSL_TRUE;
}
else
{
acceptOpts.nakMount = RSSL_FALSE;
}
RsslChannel * chnl;
RsslError error;
if ((chnl = rsslAccept(rsslServer_, &acceptOpts, &error)) == 0)
{
// if the accpet fails on the socket, just return
t42log_error("rsslAccept: failed <%s>\n",error.text);
return;
}
// set the channel
clientConnections_[nextIndex].clientChannel = chnl;
// and insert the channel into the dictionary
ChannelDictionaryItem_t * dictItem = new ChannelDictionaryItem_t;
dictItem->chnl_ = chnl;
channelDictionary_[chnl] = dictItem;
//printf("create client connection at index %d\n", nextIndex);
t42log_info("Server fd=%d: New client on Channel fd=%d\n",
rsslServer_->socketId,chnl->socketId);
// and add this socket to the set if read fds
FD_SET(chnl->socketId,&readfds_);
FD_SET(chnl->socketId,&exceptfds_);
}
int main(int argc, char **argv)
{
/* This example suite uses write descriptor in our server/Interactive Provider type examples in mainly 1 area with
* the I/O notification mechanism being used:
* 1) rsslFlush() calls used throughout the application (after module 1a), together with rsslWrite() calls, such
* as in sendMessage() function. The write descriptor can be used to indicate when the socketId has write
* availability and help with determining when the network is able to accept additional bytes for writing.
*/
/* This example suite also uses a clean FD sets and a dirty FD sets for I/O notification.
* select() - a system call for examining the status of file_descriptors.
* Tells us that there is data to read on the fds.
* Since select() modifies its file descriptor sets, if the call is being used in a loop, then the fd sets must
* be reinitialized before each call. Since they act as input/output parameters for the select() system call;
* they are read by and modified by the system call. When select() returns, the values have all been modified
* to reflect the set of file descriptors ready. So, every time before you call select(), you have to
* (re)initialize the fd_set values. Here we maintain 2 sets FD sets:
* a) clean FD sets so that we can repeatedly call select call
* b) dirty FD sets used in the actual select call (I/O notification mechanism)
* Typically, you reset the dirty FD sets to be equal to the clean FD sets before you call select().
*/
/**************************************************************************************************
DECLARING VARIABLES
**************************************************************************************************/
/* UPA Server structure returned via the rsslBind call */
RsslServer* upaSrvr = 0;
RsslBool clientAccepted = RSSL_FALSE;
char srvrPortNo[128];
/* clean FD sets so that we can repeatedly call select call */
fd_set cleanReadFds;
fd_set cleanExceptFds;
fd_set cleanWriteFds;
/* dirty FD sets used in the actual select call (I/O notification mechanism) */
fd_set useReadFds;
fd_set useExceptFds;
fd_set useWriteFds;
struct timeval time_interval;
int selRet;
RsslRet retval = RSSL_RET_FAILURE;
RsslError error;
/* UPA Bind Options used in the rsslBind call. */
RsslBindOptions bindOpts = RSSL_INIT_BIND_OPTS;
/* UPA Accept Options used in the rsslAccept call */
RsslAcceptOptions acceptOpts = RSSL_INIT_ACCEPT_OPTS;
/* RsslInProgInfo Information for the In Progress Connection State */
RsslInProgInfo inProgInfo = RSSL_INIT_IN_PROG_INFO;
/* UPA channel management information */
UpaChannelManagementInfo upaChannelManagementInfo;
/* For this simple training app, the interactive provider only supports a single client. If the consumer disconnects,
* the interactive provider would simply exit.
*
* If you want the provider to support multiple client sessions at the same time, you need to implement support
* for multiple client sessions feature similar to what rsslProvider example is doing.
*/
upaChannelManagementInfo.upaChannel = 0;
/* the default option parameters */
/* server is running on port number 14002 */
snprintf(srvrPortNo, 128, "%s", "14002");
/* User specifies options such as address, port, and interface from the command line.
* User can have the flexibilty of specifying any or all of the parameters in any order.
*/
if (argc > 1)
{
int i = 1;
while (i < argc)
{
if (strcmp("-p", argv[i]) == 0)
{
i += 2;
snprintf(srvrPortNo, 128, "%s", argv[i-1]);
}
else
{
printf("Error: Unrecognized option: %s\n\n", argv[i]);
printf("Usage: %s or\n%s [-p <SrvrPortNo>] \n", argv[0], argv[0]);
exit(RSSL_RET_FAILURE);
}
}
}
/******************************************************************************************************************
INITIALIZATION - USING rsslInitialize()
******************************************************************************************************************/
/*********************************************************
* Server/Provider Application Liefcycle Major Step 1:
* Initialize UPA Transport using rsslInitialize
* The first UPA Transport function that an application should call. This creates and initializes
* internal memory and structures, as well as performing any boot strapping for underlying dependencies.
* The rsslInitialize function also allows the user to specify the locking model they want applied
* to the UPA Transport.
*********************************************************/
/* RSSL_LOCK_NONE is used since this is a single threaded application.
* For applications with other thread models (RSSL_LOCK_GLOBAL_AND_CHANNEL, RSSL_LOCK_GLOBAL),
* see the UPA C developers guide for definitions of other locking models supported by UPA
*/
if (rsslInitialize(RSSL_LOCK_NONE, &error) != RSSL_RET_SUCCESS)
{
printf("Error %s (%d) (errno: %d) encountered with rsslInitialize. Error Text: %s\n",
rsslRetCodeToString(error.rsslErrorId), error.rsslErrorId, error.sysError, error.text);
/* End application */
exit(RSSL_RET_FAILURE);
}
FD_ZERO(&cleanReadFds);
FD_ZERO(&cleanExceptFds);
FD_ZERO(&cleanWriteFds);
/* populate bind options, then pass to rsslBind function -
* UPA Transport should already be initialized
*/
bindOpts.serviceName = srvrPortNo; /* server is running on default port number 14002 */
bindOpts.pingTimeout = 60; /* servers desired ping timeout is 60 seconds, pings should be sent every 20 */
bindOpts.minPingTimeout = 30; /* min acceptable ping timeout is 30 seconds, pings should be sent every 10 */
/* set up buffering, configure for shared and guaranteed pools */
bindOpts.guaranteedOutputBuffers = 1000;
bindOpts.maxOutputBuffers = 2000;
bindOpts.sharedPoolSize = 50000;
bindOpts.sharedPoolLock = RSSL_TRUE;
bindOpts.serverBlocking = RSSL_FALSE; /* perform non-blocking I/O */
bindOpts.channelsBlocking = RSSL_FALSE; /* perform non-blocking I/O */
bindOpts.compressionType = RSSL_COMP_NONE; /* server does not desire compression for this connection */
/* populate version and protocol with RWF information (found in rsslIterators.h) or protocol specific info */
bindOpts.protocolType = RSSL_RWF_PROTOCOL_TYPE; /* Protocol type definition for RWF */
bindOpts.majorVersion = RSSL_RWF_MAJOR_VERSION;
bindOpts.minorVersion = RSSL_RWF_MINOR_VERSION;
/******************************************************************************************************************
BINDING SETUP - USING rsslBind()
******************************************************************************************************************/
/*********************************************************
* Server/Provider Application Liefcycle Major Step 2:
* Create listening socket using rsslBind
* Establishes a listening socket connection, which supports connections from standard socket and HTTP
* rsslConnect users. Returns an RsslServer that represents the listening socket connection to the user.
* In the event of an error, NULL is returned and additional information can be found in the RsslError structure.
* Options are passed in via an RsslBindOptions structure. Once a listening socket is established, this
* RsslServer can begin accepting connections.
*********************************************************/
/* Bind UPA server */
if ((upaSrvr = rsslBind(&bindOpts, &error)) != NULL)
printf("\nServer IPC descriptor = %d bound on port %d\n", upaSrvr->socketId, upaSrvr->portNumber);
else
{
printf("Error %s (%d) (errno: %d) encountered with rsslBind. Error Text: %s\n",
rsslRetCodeToString(error.rsslErrorId), error.rsslErrorId, error.sysError, error.text);
/* End application, uninitialize to clean up first */
rsslUninitialize();
exit(RSSL_RET_FAILURE);
}
/* rsslBind listening socket connection was successful, add socketId to I/O notification mechanism and
* initialize connection
*/
/* Typical FD_SET use, this may vary depending on the I/O notification mechanism the application is using */
FD_SET(upaSrvr->socketId, &cleanReadFds);
FD_SET(upaSrvr->socketId, &cleanExceptFds);
/******************************************************************************************************************
MAIN LOOP TO SEE IF CONNECTION RECEIVED FROM CONSUMER
******************************************************************************************************************/
/* Main Loop #1 for detecting incoming client connections. The loop calls select() to wait for notification
* when the socketId of the server detects something to be read, this will check for incoming client connections.
* When a client successfully connects, a RsslChannel is returned which corresponds to this connection.
*/
/*
*If we want a non-blocking read call to the selector, we use select before read as read is a blocking call but select is not
*If we want a blocking read call to the selector, such that we want to wait till we get a message, we should use read without select.
*In the program below we will use select(), as it is non-blocking
*/
while (!clientAccepted)
{
useReadFds = cleanReadFds;
useWriteFds = cleanWriteFds;
useExceptFds = cleanExceptFds;
/* Set a timeout value for waiting and checking messages received from incoming client connections. */
/* On Linux platform, select() modifies timeout to reflect the amount of time not slept;
* most other implementations do not do this. (POSIX.1-2001 permits either behaviour.)
* This causes problems both when Linux code which reads timeout is ported to other operating systems,
* and when code is ported to Linux that reuses a struct timeval for multiple select()s
* in a loop without reinitializing it. Consider timeout to be undefined after select() returns.
*
* Note: You should reset the values of your timeout before you call select() every time.
*/
time_interval.tv_sec = 60;
time_interval.tv_usec = 0;
/* By employing an I/O notification mechanism (e.g. select, poll), an application can leverage a
* non-blocking I/O model, using the I/O notification to alert the application when data is available
* to read or when output space is available for writing to. The training examples are written from a
* non-blocking I/O perspective. Here, we use the select I/O notification mechanism in our examples.
*/
selRet = select(FD_SETSIZE, &useReadFds, &useWriteFds, &useExceptFds, &time_interval);
if (selRet == 0)
{
/* no messages received from incoming connections, continue to wait and check for incoming client connections. */
}
else if (selRet > 0)
{
/* Received a response from the consumer. */
/* On success, select() return the number of file descriptors contained in the three returned descriptor sets
* (that is, the total number of bits that are set in readfds, writefds, exceptfds)
*/
/* rsslInitChannel is called if read is triggered */
if (FD_ISSET(upaSrvr->socketId, &useReadFds))
{
/* Use rsslAccept for incoming connections, read and write data to established connections, etc */
/* Accept is typically called when servers socketId indicates activity */
/* After a server is created using the rsslBind call, the rsslAccept call can be made. When the socketId of
* the server detects something to be read, this will check for incoming client connections. When a client
* successfully connects, a RsslChannel is returned which corresponds to this connection. This channel can
* be used to read or write with the connected client. If a clients connect message is not accepted, a
* negative acknowledgment is sent to the client and no RsslChannel is returned.
*
* For this simple training app, the interactive provider only supports a single client.
*/
/* populate accept options, then pass to rsslAccept function - UPA Transport should already be initialized */
/*!< @brief If RSSL_TRUE, rsslAccept will send a NAK - even if the connection request is valid. */
acceptOpts.nakMount = RSSL_FALSE; /* allow the connection */
/*********************************************************
* Server/Provider Application Liefcycle Major Step 3:
* Accept connection using rsslAccept
* This step is performed per connected client/connection/channel
* Uses the RsslServer that represents the listening socket connection and begins the accepting process
* for an incoming connection request. Returns an RsslChannel that represents the client connection.
* In the event of an error, NULL is returned and additional information can be found in the RsslError
* structure.
* The rsslAccept function can also begin the rejection process for a connection through the use of the
* RsslAcceptOptions structure.
* Once a connection is established and transitions to the RSSL_CH_STATE_ACTIVE state, this RsslChannel
* can be used for other transport operations.
*********************************************************/
/* An OMM Provider application can begin the connection accepting or rejecting process by using the rsslAccept function */
if ((upaChannelManagementInfo.upaChannel = rsslAccept(upaSrvr, &acceptOpts, &error)) == 0)
{
printf("Error %s (%d) (errno: %d) encountered with rsslAccept. Error Text: %s\n",
rsslRetCodeToString(error.rsslErrorId), error.rsslErrorId, error.sysError, error.text);
/* End application, uninitialize to clean up first */
rsslUninitialize();
exit(RSSL_RET_FAILURE);
}
else
{
/* For this simple training app, the interactive provider only supports one client session from the consumer. */
printf("\nServer fd=%d: New client on Channel fd=%d\n",
upaSrvr->socketId,upaChannelManagementInfo.upaChannel->socketId);
/* Connection was successful, add socketId to I/O notification mechanism and initialize connection */
/* Typical FD_SET use, this may vary depending on the I/O notification mechanism the application is using */
FD_SET(upaChannelManagementInfo.upaChannel->socketId, &cleanReadFds);
FD_SET(upaChannelManagementInfo.upaChannel->socketId, &cleanExceptFds);
// set clientAccepted to be TRUE and exit the while Main Loop #1
clientAccepted = RSSL_TRUE;
}
}
}
else if (selRet < 0)
{
/* On error, -1 is returned, and errno is set appropriately; the sets and timeout become undefined */
printf("\nSelect error.\n");
/* End application, uninitialize to clean up first */
rsslUninitialize();
exit(RSSL_RET_FAILURE);
}
}
/******************************************************************************************************************
SECOND MAIN LOOP TO CONNECTION ACTIVE - LISTENING/SENDING DATA AMD PING MANAGEMENT
******************************************************************************************************************/
/* Main Loop #2 for getting connection active and successful completion of the initialization process
* The loop calls select() to wait for notification
* Currently, the main loop would exit if an error condition is triggered or
* RsslChannel.state transitions to RSSL_CH_STATE_ACTIVE.
*/
while (upaChannelManagementInfo.upaChannel->state != RSSL_CH_STATE_ACTIVE)
{
useReadFds = cleanReadFds;
useWriteFds = cleanWriteFds;
useExceptFds = cleanExceptFds;
/* Set a timeout value for getting connection active and successful completion of the initialization process */
/* On Linux platform, select() modifies timeout to reflect the amount of time not slept;
* most other implementations do not do this. (POSIX.1-2001 permits either behaviour.)
* This causes problems both when Linux code which reads timeout is ported to other operating systems,
* and when code is ported to Linux that reuses a struct timeval for multiple select()s
* in a loop without reinitializing it. Consider timeout to be undefined after select() returns.
*
* Note: You should reset the values of your timeout before you call select() every time.
*/
time_interval.tv_sec = 60;
time_interval.tv_usec = 0;
/* By employing an I/O notification mechanism (e.g. select, poll), an application can leverage a
* non-blocking I/O model, using the I/O notification to alert the application when data is available
* to read or when output space is available for writing to. The training examples are written from a
* non-blocking I/O perspective. Here, we use the select I/O notification mechanism in our examples.
*/
selRet = select(FD_SETSIZE, &useReadFds, &useWriteFds, &useExceptFds, &time_interval);
if (selRet == 0)
{
/* select has timed out, close the channel and exit */
/* On success, select() return zero if the timeout expires before anything interesting happens. */
printf("\nChannel initialization has timed out, exiting...\n");
/* Closes channel, closes server, cleans up and exits the application. */
closeChannelServerCleanUpAndExit(upaChannelManagementInfo.upaChannel, upaSrvr, RSSL_RET_FAILURE);
}
else if (selRet > 0)
{
/* Received a response from the consumer. */
/* On success, select() return the number of file descriptors contained in the three returned descriptor sets
* (that is, the total number of bits that are set in readfds, writefds, exceptfds)
*/
/* Wait for channel to become active. After an RsslChannel is returned from the client's rsslConnect or server's rsslAccept call,
* the channel may need to continue the initialization process. This additional initialization is required
* as long as the RsslChannel.state is RSSL_CH_STATE_INITIALIZING. When using non-blocking I/O, this is the
* typical state that an RsslChannel will start from and it may require multiple initialization calls to
* transition to active. rsslInitChannel is typically called based on activity on the socketId, though a timer or
* looping can be used - the rsslInitChannel function should continue to be called until the
* connection becomes active, at which point reading and writing can begin.
*/
/* Indicates that an RsslChannel requires additional initialization. This initialization is typically additional
* connection handshake messages that need to be exchanged.
*/
/* rsslInitChannel is called if read or write or except is triggered */
if (FD_ISSET(upaChannelManagementInfo.upaChannel->socketId, &useReadFds) || FD_ISSET(upaChannelManagementInfo.upaChannel->socketId, &useExceptFds))
{
/*********************************************************
* Server/Provider Application Liefcycle Major Step 4:
* Initialize until active using rsslInitChannel (UPA Transport connection establishment handshake)
* Continues initialization of an RsslChannel. This channel could originate from rsslConnect or rsslAccept.
* This function exchanges various messages to perform necessary UPA negotiations and handshakes to
* complete channel initialization.
* Requires the use of an RsslInProgInfo structure.
* The RsslChannel can be used for all additional transport functionality (e.g. reading, writing) once the
* state transitions to RSSL_CH_STATE_ACTIVE. If a connection is rejected or initialization fails,
* the state will transition to RSSL_CH_STATE_CLOSED.
*********************************************************/
/* Internally, the UPA initialization process includes several actions. The initialization includes
* any necessary UPA connection handshake exchanges, including any HTTP or HTTPS negotiation.
* Compression, ping timeout, and versioning related negotiations also take place during the
* initialization process. This process involves exchanging several messages across the connection,
* and once all message exchanges have completed the RsslChannel.state will transition. If the connection
* is accepted and all types of negotiations completed properly, the RsslChannel.state will become
* RSSL_CH_STATE_ACTIVE. If the connection is rejected, either due to some kind of negotiation failure
* or because an RsslServer rejected the connection by setting nakMount to RSSL_TRUE, the RsslChannel.state
* will become RSSL_CH_STATE_CLOSED.
*
* Note:
* For both client and server channels, more than one call to rsslInitChannel can be required to complete
* the channel initialization process.
*/
if ((retval = rsslInitChannel(upaChannelManagementInfo.upaChannel, &inProgInfo, &error)) < RSSL_RET_SUCCESS)
{
printf("Error %s (%d) (errno: %d) encountered with rsslInitChannel fd=%d. Error Text: %s\n",
rsslRetCodeToString(error.rsslErrorId), error.rsslErrorId, error.sysError, upaChannelManagementInfo.upaChannel->socketId, error.text);
/* Closes channel, closes server, cleans up and exits the application. */
closeChannelServerCleanUpAndExit(upaChannelManagementInfo.upaChannel, upaSrvr, RSSL_RET_FAILURE);
break;
}
else
{
/* Handle return code appropriately */
switch (retval)
{
/*!< (2) Transport Success: Channel initialization is In progress, returned from rsslInitChannel. */
case RSSL_RET_CHAN_INIT_IN_PROGRESS:
{
/* Initialization is still in progress, check the RsslInProgInfo for additional information */
if (inProgInfo.flags & RSSL_IP_FD_CHANGE)
{
/* The rsslInitChannel function requires the use of an additional parameter, a RsslInProgInfo structure.
* Under certain circumstances, the initialization process may be required to create new or additional underlying connections.
* If this occurs, the application is required to unregister the previous socketId and register the new socketId with
* the I/O notification mechanism being used. When this occurs, the information is conveyed by the RsslInProgInfo and the RsslInProgFlags.
*
* RSSL_IP_FD_CHANGE indicates that a socketId change has occurred as a result of this call. The previous socketId has been
* stored in RsslInProgInfo.oldSocket so it can be unregistered with the I/O notification mechanism.
* The new socketId has been stored in RsslInProgInfo.newSocket so it can be registered with the
* I/O notification mechanism. The channel initialization is still in progress and subsequent calls
* to rsslInitChannel are required to complete it.
*/
printf("\nChannel In Progress - New FD: %d Old FD: %d\n",upaChannelManagementInfo.upaChannel->socketId, inProgInfo.oldSocket );
/* File descriptor has changed, unregister old and register new */
FD_CLR(inProgInfo.oldSocket, &cleanReadFds);
FD_CLR(inProgInfo.oldSocket, &cleanExceptFds);
/* newSocket should equal upaChannelManagementInfo.upaChannel->socketId */
FD_SET(upaChannelManagementInfo.upaChannel->socketId, &cleanReadFds);
FD_SET(upaChannelManagementInfo.upaChannel->socketId, &cleanExceptFds);
}
else
{
printf("\nChannel %d In Progress...\n", upaChannelManagementInfo.upaChannel->socketId);
}
}
break;
/* channel connection becomes active!
* Once a connection is established and transitions to the RSSL_CH_STATE_ACTIVE state,
* this RsslChannel can be used for other transport operations.
*/
case RSSL_RET_SUCCESS:
{
printf("\nChannel on fd %d is now active - reading and writing can begin.\n", upaChannelManagementInfo.upaChannel->socketId);
/*********************************************************
* Connection is now active. The RsslChannel can be used for all additional
* transport functionality (e.g. reading, writing) now that the state
* transitions to RSSL_CH_STATE_ACTIVE
*********************************************************/
/* After channel is active, use UPA Transport utility function rsslGetChannelInfo to query RsslChannel negotiated
* parameters and settings and retrieve all current settings. This includes maxFragmentSize and negotiated
* compression information as well as many other values.
*/
if ((retval = rsslGetChannelInfo(upaChannelManagementInfo.upaChannel, &upaChannelManagementInfo.upaChannelInfo, &error)) != RSSL_RET_SUCCESS)
{
printf("Error %s (%d) (errno: %d) encountered with rsslGetChannelInfo. Error Text: %s\n",
rsslRetCodeToString(error.rsslErrorId), error.rsslErrorId, error.sysError, error.text);
/* Connection should be closed, return failure */
/* Closes channel, closes server, cleans up and exits the application. */
closeChannelServerCleanUpAndExit(upaChannelManagementInfo.upaChannel, upaSrvr, RSSL_RET_FAILURE);
}
printf( "Channel %d active. Channel Info:\n"
" Max Fragment Size: %u\n"
" Output Buffers: %u Max, %u Guaranteed\n"
" Input Buffers: %u\n"
" Send/Recv Buffer Sizes: %u/%u\n"
" Ping Timeout: %u\n"
" Connected component version: ",
upaChannelManagementInfo.upaChannel->socketId, /*!< @brief Socket ID of this UPA channel. */
upaChannelManagementInfo.upaChannelInfo.maxFragmentSize, /*!< @brief This is the max fragment size before fragmentation and reassembly is necessary. */
upaChannelManagementInfo.upaChannelInfo.maxOutputBuffers, /*!< @brief This is the maximum number of output buffers available to the channel. */
upaChannelManagementInfo.upaChannelInfo.guaranteedOutputBuffers, /*!< @brief This is the guaranteed number of output buffers available to the channel. */
upaChannelManagementInfo.upaChannelInfo.numInputBuffers, /*!< @brief This is the number of input buffers available to the channel. */
upaChannelManagementInfo.upaChannelInfo.sysSendBufSize, /*!< @brief This is the systems Send Buffer size. This reports the systems send buffer size respective to the transport type being used (TCP, UDP, etc) */
upaChannelManagementInfo.upaChannelInfo.sysRecvBufSize, /*!< @brief This is the systems Receive Buffer size. This reports the systems receive buffer size respective to the transport type being used (TCP, UDP, etc) */
upaChannelManagementInfo.upaChannelInfo.pingTimeout /*!< @brief This is the value of the negotiated ping timeout */
);
if (upaChannelManagementInfo.upaChannelInfo.componentInfoCount == 0)
printf("(No component info)");
else
{
RsslUInt32 count;
for(count = 0; count < upaChannelManagementInfo.upaChannelInfo.componentInfoCount; ++count)
{
printf("%.*s",
upaChannelManagementInfo.upaChannelInfo.componentInfo[count]->componentVersion.length,
upaChannelManagementInfo.upaChannelInfo.componentInfo[count]->componentVersion.data);
if (count < upaChannelManagementInfo.upaChannelInfo.componentInfoCount - 1)
printf(", ");
}
}
printf ("\n\n");
/* do not allow new client to connect */
/* For this simple training app, the interactive provider only supports a single client. Once a client
* successfully connects, we call rsslCloseServer function to close the listening socket associated with the
* RsslServer. The connected RsslChannels will remain open. This allows the established connection to continue
* to send and receive data, while preventing new clients from connecting.
*/
/* clean up server */
FD_CLR(upaSrvr->socketId, &cleanReadFds);
FD_CLR(upaSrvr->socketId, &cleanExceptFds);
/*********************************************************
* Server/Provider Application Liefcycle Major Step 7:
* Closes a listening socket associated with an RsslServer. This will release any pool based resources
* back to their respective pools, close the listening socket, and perform any additional necessary cleanup.
* Any established connections will remain open, allowing for continued information exchange.
*********************************************************/
/* clean up server using rsslCloseServer call.
* If a server is being shut down, the rsslCloseServer function should be used to close the listening socket and perform
* any necessary cleanup. All currently connected RsslChannels will remain open. This allows applications to continue
* to send and receive data, while preventing new applications from connecting. The server has the option of calling
* rsslCloseChannel to shut down any currently connected applications.
* When shutting down the UPA Transport, the application should release any unwritten pool buffers.
* The listening socket can be closed by calling rsslCloseServer. This prevents any new connection attempts.
* If shutting down connections for all connected clients, the provider should call rsslCloseChannel for each connection client.
*/
if ((upaSrvr) && (rsslCloseServer(upaSrvr, &error) < RSSL_RET_SUCCESS))
{
printf("Error %s (%d) (errno: %d) encountered with rsslCloseServer. Error Text: %s\n",
rsslRetCodeToString(error.rsslErrorId), error.rsslErrorId, error.sysError, error.text);
/* End application, uninitialize to clean up first */
rsslUninitialize();
exit(RSSL_RET_FAILURE);
}
// set upaSrvr to be NULL
upaSrvr = 0;
}
break;
default: /* Error handling */
{
printf("\nBad return value fd=%d <%s>\n",
upaChannelManagementInfo.upaChannel->socketId, error.text);
/* Closes channel, closes server, cleans up and exits the application. */
closeChannelServerCleanUpAndExit(upaChannelManagementInfo.upaChannel, upaSrvr, RSSL_RET_FAILURE);
}
break;
}
}
}
}
else if (selRet < 0)
{
/* On error, -1 is returned, and errno is set appropriately; the sets and timeout become undefined */
printf("\nSelect error.\n");
/* Closes channel, closes server, cleans up and exits the application. */
closeChannelServerCleanUpAndExit(upaChannelManagementInfo.upaChannel, upaSrvr, RSSL_RET_FAILURE);
}
}
}
int main(int argc, char **argv)
{
struct timeval time_interval;
RsslError error;
fd_set useRead;
fd_set useExcept;
int selRet;
RsslRet ret = 0;
RsslBindOptions sopts;
RsslErrorInfo rsslErrorInfo;
TimeValue nextTickTime;
RsslInt32 currentTicks;
RsslUInt32 currentRuntimeSec = 0, intervalSeconds = 0;
TimeValue tickSetStartTime; /* Holds when a paritcular run of ticks started(basically one second's worth)*/
/* Read in configuration and echo it. */
initProvPerfConfig(argc, argv);
printProvPerfConfig(stdout);
if (!(summaryFile = fopen(provPerfConfig.summaryFilename, "w")))
{
printf("Error: Failed to open file '%s'.\n", provPerfConfig.summaryFilename);
exit(-1);
}
printProvPerfConfig(summaryFile); fflush(summaryFile);
// set up a signal handler so we can cleanup before exit
signal(SIGINT, signal_handler);
nsecPerTick = 1000000000LL/(RsslInt64)providerThreadConfig.ticksPerSec;
_currentTime = getTimeNano();
nextTickTime = _currentTime;
currentTicks = 0;
xmlInitParser();
FD_ZERO(&readfds);
FD_ZERO(&exceptfds);
/* Initialize RSSL */
if (provPerfConfig.useReactor == RSSL_FALSE) // use UPA Channel
{
if (rsslInitialize(providerThreadConfig.threadCount > 1 ? RSSL_LOCK_GLOBAL : RSSL_LOCK_NONE, &error) != RSSL_RET_SUCCESS)
{
printf("RsslInitialize failed: %s\n", error.text);
exit(-1);
}
}
else // use UPA VA Reactor
{
/* The locking mode RSSL_LOCK_GLOBAL_AND_CHANNEL is required to use the RsslReactor. */
if (rsslInitialize(RSSL_LOCK_GLOBAL_AND_CHANNEL, &error) != RSSL_RET_SUCCESS)
{
printf("RsslInitialize failed: %s\n", error.text);
exit(-1);
}
}
/* Initialize run-time */
rsslProviderRuntime = getTimeNano() + ((RsslInt64)provPerfConfig.runTime * 1000000000LL);
providerInit(&provider, PROVIDER_INTERACTIVE,
processActiveChannel,
processInactiveChannel,
processMsg);
if (provPerfConfig.useReactor == RSSL_FALSE) // use UPA Channel
{
startProviderThreads(&provider, runChannelConnectionHandler);
}
else // use UPA VA Reactor
{
startProviderThreads(&provider, runReactorConnectionHandler);
}
rsslClearBindOpts(&sopts);
sopts.guaranteedOutputBuffers = provPerfConfig.guaranteedOutputBuffers;
sopts.serviceName = provPerfConfig.portNo;
if(strlen(provPerfConfig.interfaceName)) sopts.interfaceName = provPerfConfig.interfaceName;
sopts.majorVersion = RSSL_RWF_MAJOR_VERSION;
sopts.minorVersion = RSSL_RWF_MINOR_VERSION;
sopts.protocolType = RSSL_RWF_PROTOCOL_TYPE;
sopts.tcp_nodelay = provPerfConfig.tcpNoDelay;
sopts.sysSendBufSize = provPerfConfig.sendBufSize;
sopts.sysRecvBufSize = provPerfConfig.recvBufSize;
sopts.connectionType = RSSL_CONN_TYPE_SOCKET;
sopts.maxFragmentSize = provPerfConfig.maxFragmentSize;
if ((rsslSrvr = rsslBind(&sopts, &error)) == 0)
{
printf("rsslBind() failed: %d(%s)\n", error.rsslErrorId, error.text);
exit(-1);
}
printf("Server %d bound to port %d.\n\n", rsslSrvr->socketId, rsslSrvr->portNumber);
FD_SET(rsslSrvr->socketId,&readfds);
FD_SET(rsslSrvr->socketId,&exceptfds);
time_interval.tv_sec = 0; time_interval.tv_usec = 0;
nextTickTime = getTimeNano() + nsecPerTick;
currentTicks = 0;
tickSetStartTime = getTimeNano();
/* this is the main loop */
while(1)
{
useRead = readfds;
useExcept = exceptfds;
/* select() on remaining time for this tick. If we went into the next tick, don't delay at all. */
_currentTime = getTimeNano();
time_interval.tv_usec = (long)((_currentTime > nextTickTime) ? 0 : ((nextTickTime - _currentTime)/1000));
selRet = select(FD_SETSIZE, &useRead, NULL, &useExcept, &time_interval);
if (selRet == 0)
{
/* We've reached the next tick. */
nextTickTime += nsecPerTick;
++currentTicks;
if (currentTicks == providerThreadConfig.ticksPerSec)
{
++currentRuntimeSec;
++intervalSeconds;
currentTicks = 0;
}
if (intervalSeconds == provPerfConfig.writeStatsInterval)
{
providerCollectStats(&provider, RSSL_TRUE, provPerfConfig.displayStats, currentRuntimeSec,
provPerfConfig.writeStatsInterval);
intervalSeconds = 0;
}
}
else if (selRet > 0)
{
if ((rsslSrvr != NULL) && (rsslSrvr->socketId != -1) && (FD_ISSET(rsslSrvr->socketId,&useRead)))
{
if (provPerfConfig.useReactor == RSSL_FALSE) // use UPA Channel
{
RsslChannel *pChannel;
RsslError error;
RsslAcceptOptions acceptOpts = RSSL_INIT_ACCEPT_OPTS;
if ((pChannel = rsslAccept(rsslSrvr, &acceptOpts, &error)) == 0)
{
printf("rsslAccept: failed <%s>\n",error.text);
}
else
{
printf("Server %d accepting channel %d.\n\n", rsslSrvr->socketId, pChannel->socketId);
sendToLeastLoadedThread(pChannel);
}
}
else // use UPA VA Reactor
{
if (acceptReactorConnection(rsslSrvr, &rsslErrorInfo) != RSSL_RET_SUCCESS)
{
printf("acceptReactorConnection: failed <%s>\n", rsslErrorInfo.rsslError.text);
}
}
}
}
else if (selRet < 0)
{
/* continue */
#ifdef _WIN32
if (WSAGetLastError() == WSAEINTR)
continue;
#else
if (errno == EINTR)
continue;
#endif
perror("select");
exit(1);
}
/* Handle run-time */
if (_currentTime >= rsslProviderRuntime)
{
printf("\nRun time of %u seconds has expired.\n", provPerfConfig.runTime);
signal_shutdown = RSSL_TRUE; /* Tell other threads to shutdown. */
}
if (signal_shutdown == RSSL_TRUE)
{
cleanUpAndExit();
}
}
}
