152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/*
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* Copyright (c) 1988-1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Format and print trivial file transfer protocol packets.
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*
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* $Id: print-tftp.c,v 1.1 1993/11/14 21:20:57 deraadt Exp $
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*/
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#ifndef lint
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static char rcsid[] =
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"@(#) Header: print-tftp.c,v 1.13 91/04/19 10:46:57 mccanne Exp (LBL)";
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#endif
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#include <stdio.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <arpa/tftp.h>
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#include "interface.h"
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#include <strings.h>
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#include <ctype.h>
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struct int2str {
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int code;
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char *str;
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};
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/* op code to string mapping */
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static struct int2str op2str[] = {
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RRQ, "RRQ", /* read request */
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WRQ, "WRQ", /* write request */
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DATA, "DATA", /* data packet */
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ACK, "ACK", /* acknowledgement */
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ERROR, "ERROR", /* error code */
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0, 0
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};
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/* error code to string mapping */
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static struct int2str err2str[] = {
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EUNDEF, "EUNDEF", /* not defined */
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ENOTFOUND, "ENOTFOUND", /* file not found */
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EACCESS, "EACCESS", /* access violation */
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ENOSPACE, "ENOSPACE", /* disk full or allocation exceeded *?
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EBADOP, "EBADOP", /* illegal TFTP operation */
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EBADID, "EBADID", /* unknown transfer ID */
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EEXISTS, "EEXISTS", /* file already exists */
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ENOUSER, "ENOUSER", /* no such user */
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0, 0
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};
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/*
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* Print trivial file transfer program requests
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*/
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void
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tftp_print(tp, length)
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register struct tftphdr *tp;
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int length;
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{
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register struct int2str *ts;
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register u_char *ep;
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#define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
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static char tstr[] = " [|tftp]";
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/* 'ep' points to the end of avaible data. */
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ep = (u_char *)snapend;
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/* Print length */
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printf(" %d", length);
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/* Print tftp request type */
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TCHECK(tp->th_opcode, sizeof(tp->th_opcode));
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NTOHS(tp->th_opcode);
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putchar(' ');
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for (ts = op2str; ts->str; ++ts)
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if (ts->code == tp->th_opcode) {
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fputs(ts->str, stdout);
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break;
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}
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if (ts->str == 0) {
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/* Bail if bogus opcode */
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printf("tftp-#%d", tp->th_opcode);
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return;
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}
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switch (tp->th_opcode) {
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case RRQ:
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case WRQ:
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putchar(' ');
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if (printfn((u_char *)tp->th_stuff, ep)) {
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fputs(&tstr[1], stdout);
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return;
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}
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break;
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case DATA:
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TCHECK(tp->th_block, sizeof(tp->th_block));
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NTOHS(tp->th_block);
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printf(" block %d", tp->th_block);
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break;
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case ACK:
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break;
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case ERROR:
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/* Print error code string */
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TCHECK(tp->th_code, sizeof(tp->th_code));
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NTOHS(tp->th_code);
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putchar(' ');
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for (ts = err2str; ts->str; ++ts)
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if (ts->code == tp->th_code) {
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fputs(ts->str, stdout);
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break;
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}
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if (ts->str == 0)
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printf("tftp-err-#%d", tp->th_code);
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/* Print error message string */
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putchar(' ');
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if (printfn((u_char *)tp->th_data, ep)) {
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fputs(&tstr[1], stdout);
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return;
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}
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break;
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default:
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/* We shouldn't get here */
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printf("(unknown #%d)", tp->th_opcode);
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break;
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}
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return;
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trunc:
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fputs(tstr, stdout);
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#undef TCHECK
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}
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