ax25defs.js

// ax25defs.js
// AX.25 & KISS protocol-related constants

const AX25_FLAG = (1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6);	// Unused, but included for non-KISS implementations.

// Address field - SSID subfield bitmasks
const A_CRH = (1<<7);				// Command/Response or Has-Been-Repeated bit of an SSID octet
const A_RR = (1<<5)|(1<<6);			// The "R" (reserved) bits of an SSID octet
const A_SSID = (1<<1)|(1<<2)|(1<<3)|(1<<4);	// The SSID portion of an SSID octet

// Control field bitmasks
const PF = (1<<4);			// Poll/Final
const NR = (1<<5)|(1<<6)|(1<<7);	// N(R) - receive sequence number
const NS = (1<<1)|(1<<2)|(1<<3);	// N(S) - send sequence number
// 	Information frame
const I_FRAME = 0;	// Derp
// 	Supervisory frame and subtypes
const S_FRAME = (1<<0);
const S_FRAME_RR = S_FRAME;		// Receive Ready
const S_FRAME_RNR = S_FRAME|(1<<2);	// Receive Not Ready
const S_FRAME_REJ = S_FRAME|(1<<3);	// Reject
// 	Unnumbered frame and subtypes
const U_FRAME = (1<<0)|(1<<1);
const U_FRAME_SABM = U_FRAME|(1<<2)|(1<<3)|(1<<5);	// Set Asynchronous Balanced Mode
const U_FRAME_DISC = U_FRAME|(1<<6);			// Disconnect
const U_FRAME_DM = U_FRAME|(1<<2)|(1<<3);		// Disconnected Mode
const U_FRAME_UA = U_FRAME|(1<<5)|(1<<6);		// Acknowledge
const U_FRAME_FRMR = U_FRAME|(1<<2)|(1<<7);		// Frame Reject
const U_FRAME_UI =  U_FRAME;				// Information

// Protocol ID field bitmasks (most are unlikely to be used, but are here for the sake of completeness.)
const PID_X25 = (1<<0);								// ISO 8208/CCITT X.25 PLP
const PID_CTCPIP = (1<<1)|(1<<2);						// Compressed TCP/IP packet. Van Jacobson (RFC 1144)
const PID_UCTCPIP = (1<<0)|(1<<1)|(1<<2);					// Uncompressed TCP/IP packet. Van Jacobson (RFC 1144)
const PID_SEGF = (1<<4);							// Segmentation fragment
const PID_TEXNET = (1<<0)|(1<<1)|(1<<6)|(1<<7);					// TEXNET datagram protocol
const PID_LQP = (1<<2)|(1<<6)|(1<<7);						// Link Quality Protocol
const PID_ATALK = (1<<1)|(1<<3)|(1<<6)|(1<<7);					// Appletalk
const PID_ATALKARP = (1<<0)|(1<<1)|(1<<3)|(1<<6)|(1<<7);			// Appletalk ARP
const PID_ARPAIP = (1<<2)|(1<<3)|(1<<6)|(1<<7);					// ARPA Internet Protocol
const PID_ARPAAR = (1<<0)|(1<<2)|(1<<3)|(1<<6)|(1<<7);				// ARPA Address Resolution
const PID_FLEXNET = (1<<1)|(1<<2)|(1<<3)|(1<<6)|(1<<7);				// FlexNet
const PID_NETROM = (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<6)|(1<<7);			// Net/ROM
const PID_NONE = (1<<4)|(1<<5)|(1<<6)|(1<<7);					// No layer 3 protocol implemented
const PID_ESC	= (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7);	// Escape character. Next octet contains more Level 3 protocol information.

// KISS protocol-related constants

// 	FEND and transpositions
const KISS_FEND = (1<<6)|(1<<7);				// Frame end
const KISS_FESC = (1<<0)|(1<<1)|(1<<3)|(1<<4)|(1<<6)|(1<<7);	// Frame escape
const KISS_TFEND = (1<<2)|(1<<3)|(1<<4)|(1<<6)|(1<<7);		// Transposed frame end
const KISS_TFESC = (1<<0)|(1<<2)|(1<<3)|(1<<4)|(1<<6)|(1<<7);	// Transposed frame escape

// 	Commands (SetHardware (0x06) excluded intentionally.)
const KISS_DF = 0;		// Data frame
const KISS_TXD = (1<<0);	// TX delay
const KISS_P = (1<<1);		// Persistence
const KISS_ST = (1<<0)|(1<<1);	// Slot time
const KISS_TXT = (1<<2);	// TX tail
const KISS_FD = (1<<0)|(1<<2);	// Full Duplex