view rvinterf/libasync/rvtrace.c @ 921:74d284add54d

fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +0000
parents e7502631a0f9
children 6a0aa8d36d06
line wrap: on
line source

/*
 * Here we detect and handle "Lost Message" packets.
 */

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

extern u_char rvi_msg[];
extern int rvi_msg_len;

void
safe_print_trace(src, srclen, dest)
	u_char *src;
	char *dest;
{
	int i, c;
	char *dp;

	dp = dest;
	for (i = 0; i < srclen; i++) {
		c = src[i];
		if (c & 0x80) {
			*dp++ = 'M';
			*dp++ = '-';
			c &= 0x7F;
		}
		if (c < 0x20) {
			*dp++ = '^';
			*dp++ = c + '@';
		} else if (c == 0x7F) {
			*dp++ = '^';
			*dp++ = '?';
		} else
			*dp++ = c;
	}
	*dp = '\0';
}

void
handle_useid_0()
{
	char buf[MAX_PKT_FROM_TARGET*4];

	if (strncmp(rvi_msg + 7, "RVT: Lost Message", 17))
		return;
	safe_print_trace(rvi_msg + 7, rvi_msg_len - 7, buf);
	async_msg_output(buf);
}