Data receiving apparatus, data receiving method, and program storage medium

A data receiving method, comprising:

• receiving via a network a frame including a header and a data sequence which is a series of data, a sequence number being associated with each data in the data sequence;
• specifying a temporary buffer area for temporarily storing data of the data sequence included in the received frame, in a data storage configured to store data;
• specifying a destination buffer area in the data storage for storing data of the data sequence included in the received frame;
• when the destination buffer area is specified, identifying a destination number range depending on a size of the specified destination buffer area so that the destination number range follows a destination number range that was last identified, each sequence number included in an identified destination number range being assigned to a part of the specified destination buffer area that is associated with a relative position of the sequence number within the identified destination number range;
• when the frame including the header and the data sequence has been received, writing a part of the data sequence included in the received frame that falls within one of destination number ranges which has been identified in an assigned position in the destination buffer area that corresponds to the sequence number of that data, and writing remaining data of the data sequence included in the received frame that does not fall within any of the destination number ranges in the temporary buffer area;
• and
• when a destination buffer area is newly specified, reading out data, from the temporary buffer area, that has a sequence number which falls within a destination number range newly identified for the newly specified destination buffer area so as to follow said destination number ranges which have been identified and writing the read-out data in an assigned position in the newly specified destination buffer area that corresponds to the sequence number of the read-out data.

A non-transitory storage medium storing a computer program for causing a computer to execute instructions to perform the steps of:

• receiving via a network a frame including a header and a data sequence which is a series of data, a sequence number being associated with each data in the data sequence;
• specifying a temporary buffer area for temporarily storing data of the data sequence included in the received frame, in a data storage configured to store data;
• specifying a destination buffer area in the data storage for storing data of the data sequence included in the received frame;
• when the destination buffer area is specified, identifying a destination number range depending on a size of the specified destination buffer area so that the destination number range follows a destination number range that was last identified, each sequence number included in an identified destination number range being assigned to a part of the specified destination buffer area that is associated with a relative position of the sequence number within the identified destination number range;
• when the frame including the header and the data sequence has been received, writing a part of the data sequence included in the received frame that falls within one of destination number ranges which has been identified in an assigned position in the destination buffer area that corresponds to the sequence number of that data, and writing remaining data of the data sequence included in the received frame that does not fall within any of the destination number ranges in the temporary buffer area;
• and
• when a destination buffer area is newly specified, reading out data, from the temporary buffer area, that has a sequence number which falls within a destination number range newly identified for the newly specified destination buffer area so as to follow said destination number ranges which have been identified and writing the read-out data in an assigned position in the newly specified destination buffer area that corresponds to the sequence number of the read-out data.

A data processing apparatus, the apparatus processing a frame including a header and a data sequence via a network, the data sequence in the frame being a series of data, a sequence number being associated with each data in the data sequence, comprising:

• a first specifying unit configured to specify a temporary buffer area in a data storage for temporarily storing data of the data sequence included in the received frame;
• a second specifying unit configured to specify a destination buffer area in the data storage for storing data of the data sequence included in the received frame;
• a first identifying unit configured to, when the destination buffer area is specified by the second specifying unit, identify a destination number range depending on a size of the specified destination buffer area so that the destination number range follows a destination number range that was last identified, each sequence number included in an identified destination number range being assigned to a position in the specified destination buffer area that corresponds to a relative position of the sequence number within the identified destination number range;
• a data writing unit configured to, when the frame including the header and the data sequence has been received, write a part of the data sequence included in the received frame, that falls within one of destination number ranges which has been identified by the first identifying unit, in an assigned position in the destination buffer area that corresponds to the sequence number of that data, and write remaining data of the data sequence included in the received frame, that does not fall within any of the destination number ranges, in the temporary buffer area;
• and
• a data copying unit configured to, when a destination buffer area is newly specified by the second specifying unit, read out data, from the temporary buffer area, that has a sequence number which falls within a destination number range newly identified by the first identifying unit for the destination buffer area newly specified so as to follow said destination number ranges which have been identified by the first identifying unit and write the read-out data at an assigned position in the newly specified destination buffer area that corresponds to the sequence number of the read-out data.

A non-transitory storage medium storing a computer program for processing a frame including a header and a data sequence via a network, the data sequence included in the frame being a series of data, a sequence number being associated with each data in the data sequence, the program causing a computer to execute instructions to perform the steps of:

• specifying a temporary buffer area for temporarily storing data of the data sequence included in the received frame, in a data storage configured to store data;
• specifying a destination buffer area in the data storage for storing data of the data sequence included in the received frame;
• when the destination buffer area is specified, identifying a destination number range depending on a size of the specified destination buffer area so that the destination number range follows a destination number range that was last identified, each sequence number included in an identified destination number range being assigned to a part of the specified destination buffer area that is associated with a relative position of the sequence number within the identified destination number range;
• when the frame including the header and the data sequence has been received, writing a part of the data sequence included in the received frame, that falls within one of destination number ranges which has been identified, in an assigned position in the destination buffer area that corresponds to the sequence number of that data, and writing remaining data of the data sequence included in the received frame, that does not fall within any of the destination number ranges, in the temporary buffer area;
• and
• when a destination buffer area is newly specified, reading out data, from the temporary buffer area, that has a sequence number which falls within a destination number range newly identified so as to follow said destination number ranges which have been identified in response to newly specifying the destination buffer area and writing the read-out data in an assigned position in the newly specified destination buffer area that is associated with the sequence number of the read-out data.