constants

PTC Wiki ▸ Code overview ▸ constants

This module is just an enumeration of several constants used throughout the protocol:

• PROTOCOL_NUMBER: the value identifying PTC inside IP headers.
• RETRANSMISSION_TIMEOUT: seconds to wait before retransmitting every packet sent.
• MAX_RETRANSMISSION_ATTEMPTS: maximum number of retransmissions allowed for any packet.
• CLOCK_TICK: PTC clock granularity (in seconds).
• MAX_SEQ: maximum number for SEQ and ACK fields.
• MAX_WND: maximum number for the WND field.
• SYN_SENT: internal ID of the SYN_SENT state.
• SYN_RCVD: internal ID of the SYN_RCVD state.
• ESTABLISHED: internal ID of the ESTABLISHED state.
• CLOSED: internal ID of the CLOSED state.
• LISTEN: internal ID of the LISTEN state.
• FIN_WAIT1: internal ID of the FIN_WAIT1 state.
• FIN_WAIT2: internal ID of the FIN_WAIT2 state.
• CLOSE_WAIT: internal ID of the CLOSE_WAIT state.
• LAST_ACK: internal ID of the LAST_ACK state.
• CLOSING: internal ID of the CLOSING state.
• SHUT_RD: flag that allows performing a read-only shutdown of the PTC socket.
• SHUT_WR: flag that allows performing a write-only shutdown of the PTC socket.
• SHUT_RDWR: flag that allows performing a read and write shutdown of the PTC socket.
• NULL_ADDRESS: The all-zero IP address.
• RECEIVE_BUFFER_SIZE: size (in bytes) to be used for the receive buffer.
• MSS: maximum segment size (in bytes).