摘要:
Mechanisms are provided for determining a path maximum transmission unit of a path between a source node and a destination node of the path. These mechanisms transmit an echo request packet from the source node to the destination node along the path. The mechanisms further determine, by at least one intermediate node along the path, whether a size of the echo request packet is greater than a maximum transmission unit (MTU) of a next link of the path from the intermediate node to a next node along the path. Moreover, the mechanisms record, by the at least one intermediate node, the MTU of the next link in the echo request packet in response to the determination that the size of the echo request packet is greater than the MTU of the next link.
摘要:
Mechanisms are provided for determining a path maximum transmission unit of a path between a source node and a destination node of the path. These mechanisms transmit an echo request packet from the source node to the destination node along the path. The mechanisms further determine, by at least one intermediate node along the path, whether a size of the echo request packet is greater than a maximum transmission unit (MTU) of a next link of the path from the intermediate node to a next node along the path. Moreover, the mechanisms record, by the at least one intermediate node, the MTU of the next link in the echo request packet in response to the determination that the size of the echo request packet is greater than the MTU of the next link.
摘要:
Mechanisms are provided for resolving a domain name. The mechanisms send a request, from a resolver executing on the data processing system, to a name server requesting a resolution of a domain name into an address. A response to the request is received that includes a local address. The local address has a scope that is local to a site and is not global in scope. A determination is made as to whether the local address corresponds to a domain associated with the resolver. Communications are then performed with a device corresponding to the domain name using the local address in response to a determination that the local address corresponds to a domain associated with the resolver.
摘要:
Mechanisms are provided for resolving a domain name. The mechanisms send a request, from a resolver executing on the data processing system, to a name server requesting a resolution of a domain name into an address. A response to the request is received that includes a local address. The local address has a scope that is local to a site and is not global in scope. A determination is made as to whether the local address corresponds to a domain associated with the resolver. Communications are then performed with a device corresponding to the domain name using the local address in response to a determination that the local address corresponds to a domain associated with the resolver.
摘要:
A new instance of a connection that is in the wait state can be established while mitigating connection identifier collisions. Based on a connection identifier in a connection request received at a server from a client, it is determined that a previous instance of a connection represented by the connection identifier is in a wait state. An acknowledgement message comprising wait state parameters associated with the connection identifier and original connection parameters associated with the previous instance of the connection in the wait state is provided from the server to the client. In response, the server receives a compliance message comprising updated wait state parameters and updated connection parameters from the client. The new instance of the connection represented by the connection identifier that previously represented the previous instance of the connection is established based, at least in part, on the updated wait state parameters and the updated connection parameters.
摘要:
Blind attacks on a protocol connection, such as a TCP connection, are prevented by inserting checksums computed during protocol connection establishment handshake into data sent through the connection and invalidating data sent through the connection that lacks the protocol setup information checksums. Reset attacks are prevented by invalidating reset requests unless a master checksum computed from the protocol setup information checksums is included with the reset request. Checksums computed from protocol setup information have improved robustness by including a random number with the protocol setup information.
摘要:
Blind attacks on a protocol connection, such as a TCP connection, are prevented by inserting checksums computed during protocol connection establishment handshake into data sent through the connection and invalidating data sent through the connection that lacks the protocol setup information checksums. Reset attacks are prevented by invalidating reset requests unless a master checksum computed from the protocol setup information checksums is included with the reset request. Checksums computed from protocol setup information have improved robustness by including a random number with the protocol setup information.
摘要:
A new instance of a connection that is in the wait state can be established while mitigating connection identifier collisions. Based on a connection identifier in a connection request received at a server from a client, it is determined that a previous instance of a connection represented by the connection identifier is in a wait state. An acknowledgement message comprising wait state parameters associated with the connection identifier and original connection parameters associated with the previous instance of the connection in the wait state is provided from the server to the client. In response, the server receives a compliance message comprising updated wait state parameters and updated connection parameters from the client. The new instance of the connection represented by the connection identifier that previously represented the previous instance of the connection is established based, at least in part, on the updated wait state parameters and the updated connection parameters.
摘要:
Mechanisms are provided for assigning addresses for use in communications between computing devices. With these mechanisms, a centralized domain name registrar server assigns a unique global identifier to a domain of a site such that the unique global identifier uniquely identifies the domain. The unique global identifier is received in a data processing system from the centralized domain name registrar server. The site is divided into a plurality of sub-domains and a unique sub-domain identifier is assigned to each sub-domain in the site such that the unique sub-domain identifier uniquely identifies a corresponding sub-domain in the site. The global identifier for the domain of the site and the sub-domain identifiers of the sub-domains in the plurality of sub-domains are provided by the data processing system to routers of the site for use in associating addresses with devices of the site.
摘要:
A method, computer program product, and apparatus for transmitting a message over a network are presented. A processor unit receives the message for transmission over the network and a portion of an address for a source from which the message is to be transmitted. The processor unit identifies an interface configured to transmit messages from the source onto the network using the portion of the address. The processor unit then transmits the message from the source onto the network using the interface.