Communication apparatus, control method, and storage medium

A method for controlling a communication apparatus that performs Transmission Control Protocol (TCP) communication with an external apparatus, the method comprising:

• setting a maximum segment size (MSS) lower limit value to be used in the TCP communication, based on a user operation;
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where an MSS candidate value received from the external apparatus and acceptable by the external apparatus is more than or equal to the set MSS lower limit value, control to determine the MSS candidate value or the MSS lower limit value set in the communication apparatus, whichever smaller in value, as an MSS to be used in the TCP communication, and establish the TCP communication with the external apparatus using the determined MSS;
• and
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where the MSS candidate value received from the external apparatus and acceptable by the external apparatus is less than the set MSS lower limit value, control to avoid establishment of the TCP communication with the external apparatus.

A non-transitory computer readable storage medium storing a program for causing a computer to execute a method for controlling a communication apparatus that performs Transmission Control Protocol (TCP) communication with an external apparatus, the method comprising:

• setting a maximum segment size (MSS) lower limit value to be used in the TCP communication, based on a user operation;
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where an MSS candidate value received from the external apparatus and acceptable by the external apparatus is more than or equal to the set MSS lower limit value, control to determine the MSS candidate value or the MSS lower limit value set in the communication apparatus, whichever smaller in value, as an MSS to be used in the TCP communication, and establish the TCP communication with the external apparatus using the determined MSS;
• and
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where the MSS candidate value received from the external apparatus and acceptable by the external apparatus is less than the set MSS lower limit value, control to avoid establishment of the TCP communication with the external apparatus.

A method for controlling a communication apparatus that performs Transmission Control Protocol (TCP) communication with an external apparatus, the method comprising:

• setting a maximum segment size (MSS) lower limit value to be used in the TCP communication, based on a user operation;
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where an MSS candidate value received from the external apparatus and acceptable by the external apparatus is more than or equal to the set MSS lower limit value, control to determine the MSS candidate value or the MSS lower limit value set in the communication apparatus, whichever smaller in value, as an MSS to be used in the TCP communication, and establish the TCP communication with the external apparatus using the determined MSS;
• and
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where the MSS candidate value received from the external apparatus and acceptable by the external apparatus is less than the set MSS lower limit value, control to attempt establishment of the TCP communication with the external apparatus using the set MSS lower limit value, without using the MSS candidate value.

A non-transitory computer readable storage medium storing a program for causing a computer to execute a method for controlling a communication apparatus that performs Transmission Control Protocol (TCP) communication with an external apparatus, the method comprising:

• setting a maximum segment size (MSS) lower limit value to be used in the TCP communication, based on a user operation;
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where an MSS candidate value received from the external apparatus and acceptable by the external apparatus is more than or equal to the set MSS lower limit value, control to determine the MSS candidate value or the MSS lower limit value set in the communication apparatus, whichever smaller in value, as an MSS to be used in the TCP communication, and establish the TCP communication with the external apparatus using the determined MSS;
• and
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where the MSS candidate value received from the external apparatus and acceptable by the external apparatus is less than the set MSS lower limit value, control to attempt establishment of the TCP communication with the external apparatus using the set MSS lower limit value, without using the MSS candidate value.

A communication apparatus that performs Transmission Control Protocol (TCP) communication with an external apparatus, the communication apparatus comprising:

• at least one memory that stores a set of instructions;
• and
• at least one processor that executes the instructions, the instructions, when executed, causing the communication apparatus to perform operations comprising:
• setting a maximum segment size (MSS) lower limit value to be used in the TCP communication, based on a user operation;
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where an MSS candidate value received from the external apparatus and acceptable by the external apparatus is more than or equal to the set MSS lower limit value, control to determine the MSS candidate value or the MSS lower limit value set in the communication apparatus, whichever smaller in value, as an MSS to be used in the TCP communication, and establish the TCP communication with the external apparatus using the determined MSS;
• and
• executing, when an initiation request for the TCP communication is received from the external apparatus, and in a case where the MSS candidate value received from the external apparatus and acceptable by the external apparatus is less than the set MSS lower limit value, control to attempt establishment of the TCP communication with the external apparatus using the set MSS lower limit value, without using the MSS candidate value.