| /* |
| * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 |
| * 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 const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-tftp.c,v 1.39 2008-04-11 16:47:38 gianluca Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #ifdef SEGSIZE |
| #undef SEGSIZE /* SINIX sucks */ |
| #endif |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "extract.h" |
| #include "tftp.h" |
| |
| /* op code to string mapping */ |
| static struct tok op2str[] = { |
| { RRQ, "RRQ" }, /* read request */ |
| { WRQ, "WRQ" }, /* write request */ |
| { DATA, "DATA" }, /* data packet */ |
| { ACK, "ACK" }, /* acknowledgement */ |
| { TFTP_ERROR, "ERROR" }, /* error code */ |
| { OACK, "OACK" }, /* option acknowledgement */ |
| { 0, NULL } |
| }; |
| |
| /* error code to string mapping */ |
| static struct tok 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, NULL } |
| }; |
| |
| /* |
| * Print trivial file transfer program requests |
| */ |
| void |
| tftp_print(register const u_char *bp, u_int length) |
| { |
| register const struct tftphdr *tp; |
| register const char *cp; |
| register const u_char *p; |
| register int opcode, i; |
| static char tstr[] = " [|tftp]"; |
| |
| tp = (const struct tftphdr *)bp; |
| |
| /* Print length */ |
| printf(" %d", length); |
| |
| /* Print tftp request type */ |
| TCHECK(tp->th_opcode); |
| opcode = EXTRACT_16BITS(&tp->th_opcode); |
| cp = tok2str(op2str, "tftp-#%d", opcode); |
| printf(" %s", cp); |
| /* Bail if bogus opcode */ |
| if (*cp == 't') |
| return; |
| |
| switch (opcode) { |
| |
| case RRQ: |
| case WRQ: |
| case OACK: |
| p = (u_char *)tp->th_stuff; |
| putchar(' '); |
| /* Print filename or first option */ |
| if (opcode != OACK) |
| putchar('"'); |
| i = fn_print(p, snapend); |
| if (opcode != OACK) |
| putchar('"'); |
| |
| /* Print the mode (RRQ and WRQ only) and any options */ |
| while ((p = (const u_char *)strchr((const char *)p, '\0')) != NULL) { |
| if (length <= (u_int)(p - (const u_char *)&tp->th_block)) |
| break; |
| p++; |
| if (*p != '\0') { |
| putchar(' '); |
| fn_print(p, snapend); |
| } |
| } |
| |
| if (i) |
| goto trunc; |
| break; |
| |
| case ACK: |
| case DATA: |
| TCHECK(tp->th_block); |
| printf(" block %d", EXTRACT_16BITS(&tp->th_block)); |
| break; |
| |
| case TFTP_ERROR: |
| /* Print error code string */ |
| TCHECK(tp->th_code); |
| printf(" %s \"", tok2str(err2str, "tftp-err-#%d \"", |
| EXTRACT_16BITS(&tp->th_code))); |
| /* Print error message string */ |
| i = fn_print((const u_char *)tp->th_data, snapend); |
| putchar('"'); |
| if (i) |
| goto trunc; |
| break; |
| |
| default: |
| /* We shouldn't get here */ |
| printf("(unknown #%d)", opcode); |
| break; |
| } |
| return; |
| trunc: |
| fputs(tstr, stdout); |
| return; |
| } |