+
−/*
+
− * This module handles the lowest level of serial packet Tx
+
− */
+
−
+
−#include <sys/types.h>
+
−#include <sys/time.h>
+
−#include <stdio.h>
+
−#include <string.h>
+
−#include <strings.h>
+
−#include <stdlib.h>
+
−#include <unistd.h>
+
−#include "../include/pktmux.h"
+
−#include "../include/limits.h"
+
−
+
−extern int target_fd;
+
−extern int wakeup_after_sec;
+
−
+
−static u_char wakeup_shot[64];
+
−static struct timeval last_tx;
+
−
+
−send_pkt_to_target(pkt, pktlen)
+
−	u_char *pkt;
+
−{
+
−	u_char buf[MAX_PKT_TO_TARGET*2+2];
+
−	u_char *cp, *dp, *endp;
+
−	int c;
+
−	struct timeval curtime, timediff;
+
−
+
−	gettimeofday(&curtime, 0);
+
−	if (wakeup_after_sec) {
+
−		timersub(&curtime, &last_tx, &timediff);
+
−		if (timediff.tv_sec >= wakeup_after_sec) {
+
−			write(target_fd, wakeup_shot, sizeof wakeup_shot);
+
−			usleep(100000);
+
−		}
+
−	}
+
−	endp = pkt + pktlen;
+
−	dp = buf;
+
−	*dp++ = STX;
+
−	for (cp = pkt; cp < endp; cp++) {
+
−		c = *cp;
+
−		if (c == STX || c == DLE)
+
−			*dp++ = DLE;
+
−		*dp++ = c;
+
−	}
+
−	*dp++ = STX;
+
−	write(target_fd, buf, dp - buf);
+
−	bcopy(&curtime, &last_tx, sizeof(struct timeval));
+
−}