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A spoonful of unions make the weird specs go down

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XANTRONIX Development 2015-07-18 02:17:35 -05:00
parent 508a2f8146
commit 447a266432
4 changed files with 18 additions and 5 deletions
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12
include/patty/ax25.h
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@ -8,6 +8,11 @@
#define PATTY_AX25_MAX_HOPS 8
enum patty_ax25_version {
PATTY_AX25_OLD,
PATTY_AX25_2_0
};
enum patty_ax25_proto {
PATTY_AX25_PROTO_UNKNOWN = 0x00,
PATTY_AX25_PROTO_ISO_8208 = 0x01,
@ -38,7 +43,11 @@ typedef struct _patty_ax25_address {
int ssid;
int last;
int repeated;
union {
int c;
int repeated;
};
} patty_ax25_address;
typedef struct _patty_ax25_frame {
@ -49,6 +58,7 @@ typedef struct _patty_ax25_frame {
int hops;
int repeated;
enum patty_ax25_version version;
enum patty_ax25_frame_type type;
uint8_t control;

3
include/patty/ax25/macros.h
View file

@ -10,6 +10,9 @@
#define PATTY_AX25_ADDRESS_SSID_NUMBER(c) \
((c & 0x1e) >> 1)
#define PATTY_AX25_ADDRESS_SSID_C(c) \
((c & 0x80) == 0x80)
#define PATTY_AX25_ADDRESS_SSID_REPEATED(c) \
((c & 0x80) == 0x80)

2
src/Makefile
View file

@ -7,7 +7,7 @@ CC = $(CROSS)cc
CFLAGS = $(CGFLAGS) -fPIC -Wall -O2 -I$(INCLUDE_PATH)
LDFLAGS =
HEADERS = kiss.h ax25.h
HEADERS = kiss.h ax25.h ax25/macros.h
OBJS = kiss.o ax25.o test.o
PROGRAM = test

6
src/ax25.c
View file

@ -49,9 +49,9 @@ static ssize_t frame_decode_address(patty_ax25_address *address, void *data, off
/*
* Now, unpack the data from the SSID field.
*/
address->repeated = PATTY_AX25_ADDRESS_SSID_REPEATED(ssid);
address->ssid = PATTY_AX25_ADDRESS_SSID_NUMBER(ssid);
address->last = PATTY_AX25_ADDRESS_OCTET_LAST(ssid);
address->c = PATTY_AX25_ADDRESS_SSID_C(ssid);
address->ssid = PATTY_AX25_ADDRESS_SSID_NUMBER(ssid);
address->last = PATTY_AX25_ADDRESS_OCTET_LAST(ssid);
return 7;