usr/src/sbin/routed/trace.h

/*      trace.h 4.4     84/04/09        */

/*
 * Routing table management daemon.
 */

/*
 * Trace record format.
 */
struct  iftrace {
        time_t  ift_stamp;              /* time stamp */
        struct  sockaddr ift_who;       /* from/to */
        char    *ift_packet;            /* pointer to packet */
        short   ift_size;               /* size of packet */
        short   ift_metric;             /* metric on associated metric */
};

/*
 * Per interface packet tracing buffers.  An incoming and
 * outgoing circular buffer of packets is maintained, per
 * interface, for debugging.  Buffers are dumped whenever
 * an interface is marked down.
 */
struct  ifdebug {
        struct  iftrace *ifd_records;   /* array of trace records */
        struct  iftrace *ifd_front;     /* next empty trace record */
        int     ifd_count;              /* number of unprinted records */
        struct  interface *ifd_if;      /* for locating stuff */
};

/*
 * Packet tracing stuff.
 */
int     tracepackets;           /* watch packets as they go by */
int     tracing;                /* on/off */
FILE    *ftrace;                /* output trace file */

#define TRACE_ACTION(action, route) { \
          if (tracing) \
                traceaction(ftrace, "action", route); \
        }
#define TRACE_INPUT(ifp, src, size) { \
          if (tracing) { \
                ifp = if_iflookup(src); \
                if (ifp) \
                        trace(&ifp->int_input, src, packet, size, \
                                ntohl(ifp->int_metric)); \
          } \
          if (tracepackets) \
                dumppacket(stdout, "from", src, packet, size); \
        }
#define TRACE_OUTPUT(ifp, dst, size) { \
          if (tracing) \
                trace(&ifp->int_output, dst, packet, size, ifp->int_metric); \
          if (tracepackets) \
                dumppacket(stdout, "to", dst, packet, size); \
        }