Get to where we're actually finding airspy packet boundaries.

common.h

@@ -0,0 +1,32 @@
+#include <stdint.h>
+#include <unistd.h>
+
+
+#define BUF_LEN 4096
+struct buf {
+	char *buf;
+	char *tmp;
+	size_t start;
+	size_t length;
+};
+
+
+#define MLAT_HZ 60000000
+#define DATA_MAX 14
+struct packet {
+	enum {
+		MODE_AC,
+		MODE_S_SHORT,
+		MODE_S_LONG,
+	} type;
+	char data[DATA_MAX];
+	uint64_t mlat_timestamp;
+	uint32_t rssi;
+};
+
+
+void buf_init(struct buf *, char *, char *);
+void buf_alias(struct buf *, struct buf *);
+
+ssize_t buf_fill(struct buf *, int);
+void buf_consume(struct buf *, size_t);