148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
/* $NetBSD: print-tftp.c,v 1.2 1995/03/06 19:11:35 mycroft Exp $ */
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/*
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* Copyright (c) 1990, 1991, 1993, 1994
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* The Regents of the University of California. 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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#ifndef lint
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static char rcsid[] =
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"@(#) Header: print-tftp.c,v 1.20 94/06/14 20:18:49 leres Exp (LBL)";
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/tftp.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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/* op code to string mapping */
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static struct token 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, NULL }
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};
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/* error code to string mapping */
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static struct token 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, NULL }
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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(register const u_char *bp, int length)
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{
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register const struct tftphdr *tp;
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register const char *cp;
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register const u_char *ep, *p;
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register int opcode;
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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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tp = (const struct tftphdr *)bp;
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/* 'ep' points to the end of avaible data. */
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ep = 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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opcode = ntohs(tp->th_opcode);
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cp = tok2str(op2str, "tftp-#%d", opcode);
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printf(" %s", cp);
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/* Bail if bogus opcode */
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if (*cp == 't')
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return;
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switch (opcode) {
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case RRQ:
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case WRQ:
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putchar(' ');
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/*
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* XXX Not all arpa/tftp.h's specify th_stuff as any
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* array; use address of th_block instead
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*/
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#ifdef notdef
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p = (u_char *)tp->th_stuff;
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#else
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p = (u_char *)&tp->th_block;
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#endif
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if (fn_print(p, 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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printf(" block %d", ntohs(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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printf(" %s ", tok2str(err2str, "tftp-err-#%d",
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ntohs(tp->th_code)));
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/* Print error message string */
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if (fn_print((const 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)", 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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