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AX25
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1994-06-06
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4KB
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95 lines
/* AX.25 datagram (address) sub-layer definitions */
/* Maximum number of digipeaters */
#define MAXDIGIS 7 /* 7 digipeaters plus src/dest */
#define ALEN 6 /* Number of chars in callsign field */
#define AXALEN 7 /* Total AX.25 address length, including SSID */
/* Internal representation of an AX.25 address */
struct ax25_addr {
char call[ALEN];
char ssid;
#define SSID 0x1e /* Sub station ID */
#define REPEATED 0x80 /* Has-been-repeated bit in repeater field */
#define E 0x01 /* Address extension bit */
#define C 0x80 /* Command/response designation */
};
#define NULLAXADDR (struct ax25_addr *)0
/* Our AX.25 address */
extern struct ax25_addr mycall;
/* AX.25 broadcast address: "QST -0" in shifted ASCII */
extern struct ax25_addr ax25_bdcst;
/* Internal representation of an AX.25 header */
struct ax25 {
struct ax25_addr dest; /* Destination address */
struct ax25_addr source; /* Source address */
struct ax25_addr digis[MAXDIGIS]; /* Digi string */
int ndigis; /* Number of digipeaters */
int cmdrsp; /* Command/response */
};
/* AX.25 mheard entry layout - to be qsorted by time */
struct ax25mh {
time_t mheard_time; /* time was last heard */
struct ax25_addr mheard_call; /* recorded call sign */
int mheard_digi; /* was digipeated at least once */
};
/* C-bit stuff */
#define UNKNOWN 0
#define COMMAND 1
#define RESPONSE 2
/* Bit fields in AX.25 Level 3 Protocol IDs (PIDs) */
#define PID_SEGMENT 0x08 /* Segmentation fragment */
#define PID_IP 0xcc /* ARPA Internet Protocol */
#define PID_ARP 0xcd /* ARPA Address Resolution Protocol */
#define PID_NETROM 0xcf /* NET/ROM */
#define PID_NO_L3 0xf0 /* No level 3 protocol */
#define SEG_FIRST 0x80 /* First segment of a sequence */
#define SEG_REM 0x7f /* Mask for # segments remaining */
/* In AX25 */
int ax_send(struct mbuf *, struct interface *, int32, char, char, char, char);
int ax_output(struct interface *, char *, char *, char, struct mbuf *);
void ax_recv(struct interface *, struct mbuf *);
void axarp(void);
/* In AX25CMD */
int doax25(int, char **);
int doconnect(int, char **);
void ax_parse(struct session *, char *, int16);
/* In AX25DUMP */
void ax25_dump(struct mbuf **, int);
char *decode_type(int16);
/* In AX25SUBR */
struct ax25_cb *find_ax25(struct ax25_addr *);
void del_ax25(struct ax25_cb *);
struct ax25_cb *cr_ax25(struct ax25_addr *);
int setcall(struct ax25_addr *, char *);
int setpath(char *, char **, int);
int addreq(struct ax25_addr *, struct ax25_addr *);
int pax25(char *, struct ax25_addr *);
int psax25(char *, char *);
char *getaxaddr(struct ax25_addr *, char *);
char *putaxaddr(char *, struct ax25_addr *);
struct mbuf *htonax25(struct ax25 *, struct mbuf *);
int atohax25(struct ax25 *, char *, struct ax25_addr *);
int ntohax25(struct ax25 *, struct mbuf **);
int16 ftype(char);
/* In AX25USER */
int send_ax25(struct ax25_cb *, struct mbuf *);
int aprintf(struct ax25_cb *, char *, ...);
struct mbuf *recv_ax25(struct ax25_cb *, int16);
void disc_ax25(struct ax25_cb *);
int ax25val(struct ax25_cb *);
int kick_ax25(struct ax25_cb *);
void reset_ax25(struct ax25_cb *);