Abstract: A multi-display system and method supporting differing accessibility feature selection provides a suitable display for a user with limited visual acuity, while providing a second display having a different accessibility feature set to a second user. An application or operating system checks selected accessibility features and display settings corresponding to each graphical display device and generates multiple graphical outputs in conformity with program output and the corresponding accessibility features and display settings for each device. One graphical display may be a personal computer display and the other a projector, so that an accessible desktop can be presented to the presenter, while the presentation can be shown with a desired set of attributes. The operating system may support the above-described operation by generating the multiple display outputs from the accessibility settings and a single program output.

Abstract: The present invention provides a method for handling reordered data packets. A method comprises receiving a data packet and determining if the data packet is received out of order. The method further comprises delaying transmission of an acknowledgement indicating that a data packet is missing in response to determining that the data packet is received out of order.

Abstract: A method, system, and program for monitoring thread usage to dynamically control a thread pool are provided. An application running on the server system invokes a listener thread on a listener socket for receiving client requests at the server system and passing the client requests to one of multiple threads waiting in a thread pool. Additionally, the application sends an ioctl call in blocking mode on the listener thread. A TCP layer within the server system detects the listener thread in blocking mode and monitors a thread count of at least one of a number of incoming requests waiting to be processed and a number of said plurality of threads remaining idle in the thread pool over a sample period. Once the TCP layer detects a thread usage event, the ioctl call is returned indicating the thread usage event with the thread count, such that a number of threads in the thread pool may be dynamically adjusted to handle the thread count.

Abstract: A computer implemented method, data processing system, and computer program product for efficiently using disk space when unarchiving files in the same file system. An archive file is read to identify a total number of data files in the archive file. The number of headers in the archive file is determined based on the total number of data files. A location in a first disk space of a largest data file in the archive file is determined from an offset in a header corresponding to the largest data file. The largest data file is then copied from the first disk space to a second disk space. The first disk space occupied by the largest data file is then released by truncating the archive file. The obtaining, copying, and releasing steps are repeated for each data file in the archive file until all of the data files are unarchived.

Abstract: A method for efficiently determining the path maximum transmission unit (MTU) during a handshake between a source host and a target host across a computer network. During the handshake, each router receives the SYN (synchronization) packet transmitted from the source host, and each router updates the value of the path MTU within the SYN packet when the path MTU value is greater than the MTU of the router. When the SYN packet reaches the target host, the target host also updates the value of the path MTU if the value of the path MTU within the SYN packet is greater than that of the target host. With this sequential checking and updating of the path MTU against their MTUs, the combination of the routers en-route and the target host ensures that the final path MTU is equal to or smaller than the smallest MTU of the various components/networks along the path.

Abstract: A method, system, and program for monitoring thread usage to dynamically control a thread pool are provided. An application running on the server system invokes a listener thread on a listener socket for receiving client requests at the server system and passing the client requests to one of multiple threads waiting in a thread pool. Additionally, the application sends an ioctl call in blocking mode on the listener thread. A TCP layer within the server system detects the listener thread in blocking mode and monitors a thread count of at least one of a number of incoming requests waiting to be processed and a number of said plurality of threads remaining idle in the thread pool over a sample period. Once the TCP layer detects a thread usage event, the ioctl call is returned indicating the thread usage event with the thread count, such that a number of threads in the thread pool may be dynamically adjusted to handle the thread count.

Abstract: A computer implemented method, apparatus, system, and computer usable program code for updating a domain name server. In response to detecting a failed network interface in a plurality of network interfaces on a content server, the content server identifies an IP address for the failed network interface. The content server notifies a domain name server that the IP address for the failed network interface is an unreachable IP address. The domain name server does not provide the unreachable IP address to a querying client.

Abstract: A method for processing data packets in an interception proxy server without using a Network Address Translation module. A TCP packet received at a router is encapsulated using generic routing encapsulation (GRE). The TCP packet is redirected to a proxy server through a GRE tunnel which includes a redirection rule comprising a local destination IP address and port to be used for traffic passed through the tunnel. When the proxy server receives the TCP packet, the TCP packet is decapsulated. If a flag is set in the payload header of the TCP packet indicating that a redirection rule has been configured for traffic passed through the tunnel, the payload header of the TCP packet is modified according to the redirection rule. The modified TCP packet is then passed to a transmission control protocol of the proxy server.

Abstract: A method for improving the efficiency of Internet Protocol Control Block (INPCB) lookup operations at a TCP receiver and TCP sender. The TCP/IP stack is modified such that every data packet generated includes both data and INPCB address information. Specifically, the TCP/IP stacks of a sending device and a receiving device are modified to provide a contemporaneous transmission of INPCB addresses along with each data packet. The TCP/IP stack of the receiver is also modified such that the receiver echoes this INPCB address along with each TCP packet sent back to the sender to eliminate the necessity of an INPCB address lookup operation at the sending device. Contemporaneous transmission of data and INPCB addresses facilitates direct delivery of data packets to the corresponding sockets.

Abstract: A solution for managing a communications connection, in which one or more acknowledgements are filtered is provided. In particular, data can be obtained for forwarding to a remote device, and at least some of the data can be communicated for processing on the remote device. Subsequently, an acknowledgement is received for the at least some of the data, and a determination is made as to whether to forward the acknowledgement based on an optimization configuration. The invention can include several checks to ensure that any acknowledgement that should be forwarded for further processing is properly forwarded. In one embodiment, the invention is implemented on a network adapter, and enables numerous acknowledgements that are received by the network adapter for a large send data packet to be filtered and not provided to a protocol stack.

Abstract: A method, system and apparatus for improving data transfer rate over a network are provided. When a piece of data is to be transmitted to a target system, it is divided into a number of packets and a determination is made as to whether the number of packets exceeds a threshold number. If so, the packets are transferred in parallel over a plurality of network connections. The ideal network connections are TCP/IP connections. Thus, each packet has an IP header, which contains an IP identification field. An indicium is placed into the IP identification field for proper reconstruction of the data by the target system.

Abstract: Methods, systems, and media are disclosed for improved granularity of a response-request communication on a networked computer system. One example embodiment includes receiving the request-response communication by the networked computer system, and associating the request-response communication with a port, having a nodelay setting, from a set of ports on the networked computer system. Further, the example embodiment includes enabling, based upon the associating, the nodelay setting upon connection of the request-response communication with the port. Further still, the example embodiment includes sending, in accordance with the enabling, the request-response communication to a destination in communication with the networked computer system.

Abstract: A method, system and apparatus for improving data transfer rate over a network are provided. When a piece of data is to be transmitted to a target system, it is divided into a number of packets and a determination is made as to whether the number of packets exceeds a threshold number. If so, the packets are transferred in parallel over a plurality of network connections. The ideal network connections are TCP/IP connections. Thus, each packet has an IP header, which contains an IP identification field. An indicium is placed into the IP identification field for proper reconstruction of the data by the target system.

Abstract: The illustrative embodiments provide a computer implemented method, a data processing system, and a computer program product for managing a plurality of interfaces. An application selects a subset of the plurality of interfaces. In response to the selection, the application is bound to the subset of interfaces, wherein the application listens to the subset of interfaces.

Abstract: A method, system and apparatus for maintaining a two-byte identification field of IP headers when a Gigabit Ethernet is in use are provided. Since the IP identification field is of two bytes, there is a limited number of identification numbers that may be used. Due to the high data transfer rate of the Gigabit Ethernet, this number may be reached within one second. Hence, there may be a possibility that two or more packets may have the same identification number while in transit. In a representative embodiment, one identification number is used for packets that may not be fragmented; thus, freeing the rest of the numbers for packets that may be fragmented.

Abstract: Methods, systems, and media are disclosed for improved granularity of a response-request communication on a networked computer system. One example embodiment includes receiving the request-response communication by the networked computer system, and associating the request-response communication with a port, having a nodelay setting, from a set of ports on the networked computer system. Further, the example embodiment includes enabling, based upon the associating, the nodelay setting upon connection of the request-response communication with the port. Further still, the example embodiment includes sending, in accordance with the enabling, the request-response communication to a destination in communication with the networked computer system.

Abstract: A computer implemented method, apparatus, and computer usable program code to determine whether an acknowledgment packet from an end point acknowledges receipt of unsent data in response to receiving the acknowledgement packet over a connection with the end point. A determination is made as to whether acknowledgement packets for unsent data have been received sequentially a selected number of times over the connection in response to the acknowledgement packet being for unsent data. The acknowledgment packet is dropped if acknowledgement packets have been received sequentially the selected number of times over the connection.

Abstract: A computer implemented method, apparatus, and computer usable program code for processing data packets. A set of data fragments are received at the data processing system to form a set of received data fragments. Assembly of the set of data fragments is initiated into a data packet, and a determination as to whether the data packet is an incomplete data packet. Responsive to a determination that the data packet is an incomplete data packet, the incomplete data packet is filled with at least one character to form a final data packet. The final data packet is forwarded to the target.

Abstract: Responsive to detecting a need for a mobile device to transfer out of a first network, requests are sent from the mobile device to a communication endpoint in mSCTP. The first request is to stop transmissions to a first address of said mobile device. The second request is to add an intermediary address of a mobility support service designated for receiving any communications already in transmission when the first request is sent. The communication link for the mobile device is then transitioned from the current address at the first network to a second address at a second network. The first network and the second network are non-intersecting networks. The mobile device then indicates to the mobility support service that the handover from the first network to the second network is complete. The mobility support service responds to the completion by sending a third request in mSCTP to the communication endpoint to continue communication with the mobile client at the second address.

Abstract: A method, system, and computer program product for negotiating a smart maximum segment size of a network connection for a data transfer. A client request to initiate a network connection, which includes a first maximum segment size, is received at a server. The server calculates a second maximum segment size, wherein at least one of the first maximum segment size or the second maximum segment size is a cache line size aligned Ethernet frame size, or smart maximum segment size. The server determines the smaller of the first and second maximum segment sizes and sends the second maximum segment size to the client. The client then selects the smaller of the first and second maximum segment sizes, and sends an acknowledgement to the server to complete the connection. The smaller of the first and second maximum segment sizes is used for the network connection and subsequent data transfer.