/*
 * Basic ETM interaction
 */

#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include "../pktmux.h"
#include "../limits.h"
#include "etm.h"

extern u_char rvi_msg[];
extern int rvi_msg_len;

void
print_etm_pkt_raw(err)
	char *err;
{
	char buf[MAX_PKT_FROM_TARGET*3+80], *dp;
	int i;

	sprintf(buf, "%s:", err);
	dp = index(buf, '\0');
	for (i = 2; i < rvi_msg_len; i++) {
		sprintf(dp, " %02X", rvi_msg[i]);
		dp += 3;
	}
	async_msg_output(buf);
}

void
etm_packet_rx()
{
	int i, c;

	if (rvi_msg_len < 4) {
runt:		print_etm_pkt_raw("ETM Runt");
		return;
	}
	c = 0;
	for (i = 2; i < rvi_msg_len; i++)
		c ^= rvi_msg[i];
	if (c) {
		print_etm_pkt_raw("BAD CKSUM");
		return;
	}
	switch (rvi_msg[2]) {
	case ETM_CORE:
		if (rvi_msg_len < 6)
			goto runt;
		tmcore_msg_rx();
		return;
	default:
		print_etm_pkt_raw("ETM Unknown");
	}
}

void
cmd_etmpkt(argc, argv)
	char **argv;
{
	u_char pkt[MAX_PKT_TO_TARGET];
	int di, c, b;
	char **ap;

	pkt[0] = RVT_TM_HEADER;
	di = 1;
	c = 0;
	for (ap = argv + 1; *ap; ap++) {
		b = strtoul(*ap, 0, 16);
		pkt[di++] = b;
		c ^= b;
	}
	pkt[di++] = c;
	send_pkt_to_target(pkt, di);
}

void
send_etm_cmd(buf, len)
	u_char *buf;
{
	int i, c;

	buf[0] = RVT_TM_HEADER;
	c = 0;
	for (i = 1; i <= len; i++)
		c ^= buf[i];
	buf[i] = c;
	send_pkt_to_target(buf, len + 2);
}