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/*
* Copyright (c) 1988-1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Format and print trivial file transfer protocol packets.
*/
#ifndef lint
static char rcsid[] =
"@(#) $Header: print-tftp.c,v 1.13 91/04/19 10:46:57 mccanne Exp $ (LBL)";
#endif
#include <stdio.h>
#include <sys/param.h>
#include <sys/types.h>
#include <arpa/tftp.h>
#include "interface.h"
#include <strings.h>
#include <ctype.h>
struct int2str {
int code;
char *str;
};
/* op code to string mapping */
static struct int2str op2str[] = {
RRQ, "RRQ", /* read request */
WRQ, "WRQ", /* write request */
DATA, "DATA", /* data packet */
ACK, "ACK", /* acknowledgement */
ERROR, "ERROR", /* error code */
0, 0
};
/* error code to string mapping */
static struct int2str err2str[] = {
EUNDEF, "EUNDEF", /* not defined */
ENOTFOUND, "ENOTFOUND", /* file not found */
EACCESS, "EACCESS", /* access violation */
ENOSPACE, "ENOSPACE", /* disk full or allocation exceeded *?
EBADOP, "EBADOP", /* illegal TFTP operation */
EBADID, "EBADID", /* unknown transfer ID */
EEXISTS, "EEXISTS", /* file already exists */
ENOUSER, "ENOUSER", /* no such user */
0, 0
};
/*
* Print trivial file transfer program requests
*/
void
tftp_print(tp, length)
register struct tftphdr *tp;
int length;
{
register struct int2str *ts;
register u_char *ep;
#define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
static char tstr[] = " [|tftp]";
/* 'ep' points to the end of avaible data. */
ep = (u_char *)snapend;
/* Print length */
printf(" %d", length);
/* Print tftp request type */
TCHECK(tp->th_opcode, sizeof(tp->th_opcode));
NTOHS(tp->th_opcode);
putchar(' ');
for (ts = op2str; ts->str; ++ts)
if (ts->code == tp->th_opcode) {
fputs(ts->str, stdout);
break;
}
if (ts->str == 0) {
/* Bail if bogus opcode */
printf("tftp-#%d", tp->th_opcode);
return;
}
switch (tp->th_opcode) {
case RRQ:
case WRQ:
putchar(' ');
if (printfn((u_char *)tp->th_stuff, ep)) {
fputs(&tstr[1], stdout);
return;
}
break;
case DATA:
TCHECK(tp->th_block, sizeof(tp->th_block));
NTOHS(tp->th_block);
printf(" block %d", tp->th_block);
break;
case ACK:
break;
case ERROR:
/* Print error code string */
TCHECK(tp->th_code, sizeof(tp->th_code));
NTOHS(tp->th_code);
putchar(' ');
for (ts = err2str; ts->str; ++ts)
if (ts->code == tp->th_code) {
fputs(ts->str, stdout);
break;
}
if (ts->str == 0)
printf("tftp-err-#%d", tp->th_code);
/* Print error message string */
putchar(' ');
if (printfn((u_char *)tp->th_data, ep)) {
fputs(&tstr[1], stdout);
return;
}
break;
default:
/* We shouldn't get here */
printf("(unknown #%d)", tp->th_opcode);
break;
}
return;
trunc:
fputs(tstr, stdout);
#undef TCHECK
}
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