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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
- }
-