XANTRONIX Development
18134dde49
Implement patty_ax25_frame_decode_xid() to decode XID frame data, adhering to the basic structure of ISO 8885 as closely as possible
152 lines
4.5 KiB
C
152 lines
4.5 KiB
C
#ifndef _PATTY_AX25_FRAME_H
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#define _PATTY_AX25_FRAME_H
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#include <stdint.h>
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#include <sys/types.h>
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#define PATTY_AX25_FRAME_DEFAULT_MAXLEN 256
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#define PATTY_AX25_FRAME_DEFAULT_WINDOW 8
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enum patty_ax25_frame_format {
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PATTY_AX25_FRAME_NORMAL,
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PATTY_AX25_FRAME_EXTENDED
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};
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enum patty_ax25_frame_cr {
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PATTY_AX25_FRAME_OLD,
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PATTY_AX25_FRAME_COMMAND,
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PATTY_AX25_FRAME_RESPONSE
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};
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enum patty_ax25_frame_flag {
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PATTY_AX25_FRAME_POLL = 1,
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PATTY_AX25_FRAME_FINAL = 1
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};
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#define PATTY_AX25_FRAME_CONTROL_I(c) \
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((c & 0x1) == 0x00)
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#define PATTY_AX25_FRAME_CONTROL_S(c) \
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((c & 0x03) == 0x01)
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#define PATTY_AX25_FRAME_CONTROL_U(c) \
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((c & 0x03) == 0x03)
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#define PATTY_AX25_FRAME_CONTROL_UI(c) \
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((c & 0xef) == 0x03)
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#define PATTY_AX25_FRAME_CONTROL_FLAG(c) \
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((c & 0x01) >> 4)
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#define PATTY_AX25_FRAME_SIZE(format, hops, c, infolen) \
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(((2 + hops) * sizeof(patty_ax25_addr)) \
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+ (format == PATTY_AX25_FRAME_EXTENDED? 2: 1) \
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+ (PATTY_AX25_FRAME_CONTROL_I(c)? 1 + infolen: 0))
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#define PATTY_AX25_FRAME_S_MASK 0x0f
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#define PATTY_AX25_FRAME_U_MASK 0xef
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enum patty_ax25_frame_type {
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PATTY_AX25_FRAME_I = 0x00,
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PATTY_AX25_FRAME_RR = 0x01,
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PATTY_AX25_FRAME_RNR = 0x05,
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PATTY_AX25_FRAME_REJ = 0x09,
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PATTY_AX25_FRAME_SREJ = 0x0d,
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PATTY_AX25_FRAME_SABM = 0x2f,
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PATTY_AX25_FRAME_SABME = 0x6f,
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PATTY_AX25_FRAME_DISC = 0x43,
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PATTY_AX25_FRAME_DM = 0x0f,
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PATTY_AX25_FRAME_UA = 0x63,
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PATTY_AX25_FRAME_FRMR = 0x87,
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PATTY_AX25_FRAME_UI = 0x03,
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PATTY_AX25_FRAME_XID = 0x8f,
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PATTY_AX25_FRAME_TEST = 0xe3,
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PATTY_AX25_FRAME_UNKNOWN = 0xff
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};
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typedef struct _patty_ax25_frame {
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patty_ax25_addr dest,
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src,
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repeaters[PATTY_AX25_MAX_HOPS];
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unsigned int hops;
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uint16_t control;
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uint8_t nr, ns, pf;
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enum patty_ax25_frame_cr cr;
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enum patty_ax25_frame_type type;
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enum patty_ax25_version version;
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uint8_t proto;
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void *info;
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size_t infolen;
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} patty_ax25_frame;
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#pragma pack(push)
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#pragma pack(1)
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typedef struct _patty_ax25_frame_xid_element {
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uint8_t format,
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group;
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uint16_t len;
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} patty_ax25_frame_xid_element;
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typedef struct _patty_ax25_frame_xid_param {
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uint8_t id, len;
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} patty_ax25_frame_xid_param;
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enum patty_ax25_frame_xid_param_type {
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PATTY_AX25_FRAME_XID_PARAM_CLASS = 2,
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PATTY_AX25_FRAME_XID_PARAM_HDLC = 3,
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PATTY_AX25_FRAME_XID_PARAM_INFO_TX = 5,
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PATTY_AX25_FRAME_XID_PARAM_INFO_RX = 6,
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PATTY_AX25_FRAME_XID_PARAM_WINDOW_TX = 7,
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PATTY_AX25_FRAME_XID_PARAM_WINDOW_RX = 8,
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PATTY_AX25_FRAME_XID_PARAM_ACK = 9
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};
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#pragma pack(pop)
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typedef int (*patty_ax25_frame_xid_callback)(enum patty_ax25_frame_xid_param_type type,
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size_t len,
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uint8_t *data,
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void *ctx);
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ssize_t patty_ax25_frame_decode_address(patty_ax25_frame *frame,
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void *buf,
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size_t len);
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ssize_t patty_ax25_frame_decode_control(patty_ax25_frame *frame,
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enum patty_ax25_frame_format format,
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void *buf,
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size_t offset,
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size_t len);
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ssize_t patty_ax25_frame_decode_xid(patty_ax25_frame_xid_callback callback,
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void *data,
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size_t offset,
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size_t len,
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void *ctx);
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ssize_t patty_ax25_frame_encode(patty_ax25_frame *frame,
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enum patty_ax25_frame_format format,
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void *buf,
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size_t len);
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ssize_t patty_ax25_frame_encode_reply_to(patty_ax25_frame *frame,
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patty_ax25_frame *reply,
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enum patty_ax25_frame_format format,
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void *buf,
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size_t len);
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enum patty_ax25_version patty_ax25_frame_version(patty_ax25_frame *frame);
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enum patty_ax25_frame_type patty_ax25_frame_type(patty_ax25_frame *frame);
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enum patty_ax25_frame_cr patty_ax25_frame_cr(patty_ax25_frame *frame);
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ssize_t patty_ax25_frame_info(patty_ax25_frame *frame,
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void **info);
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#endif /* _PATTY_AX25_FRAME_H */
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