print-tftp.c revision 127668
117680Spst/* 239297Sfenner * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 317680Spst * The Regents of the University of California. All rights reserved. 417680Spst * 517680Spst * Redistribution and use in source and binary forms, with or without 617680Spst * modification, are permitted provided that: (1) source code distributions 717680Spst * retain the above copyright notice and this paragraph in its entirety, (2) 817680Spst * distributions including binary code include the above copyright notice and 917680Spst * this paragraph in its entirety in the documentation or other materials 1017680Spst * provided with the distribution, and (3) all advertising materials mentioning 1117680Spst * features or use of this software display the following acknowledgement: 1217680Spst * ``This product includes software developed by the University of California, 1317680Spst * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 1417680Spst * the University nor the names of its contributors may be used to endorse 1517680Spst * or promote products derived from this software without specific prior 1617680Spst * written permission. 1717680Spst * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 1817680Spst * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 1917680Spst * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 2017680Spst * 2117680Spst * Format and print trivial file transfer protocol packets. 2217680Spst */ 2317680Spst 2417680Spst#ifndef lint 25127668Sbmsstatic const char rcsid[] _U_ = 26127668Sbms "@(#) $Header: /tcpdump/master/tcpdump/print-tftp.c,v 1.35.2.2 2003/11/16 08:51:50 guy Exp $ (LBL)"; 2717680Spst#endif 2817680Spst 2956893Sfenner#ifdef HAVE_CONFIG_H 3056893Sfenner#include "config.h" 3156893Sfenner#endif 3256893Sfenner 33127668Sbms#include <tcpdump-stdinc.h> 3417680Spst 3539297Sfenner#ifdef SEGSIZE 3639297Sfenner#undef SEGSIZE /* SINIX sucks */ 3739297Sfenner#endif 3817680Spst#include <arpa/tftp.h> 3917680Spst 4017680Spst#include <stdio.h> 4117680Spst#include <string.h> 4217680Spst 4317680Spst#include "interface.h" 4417680Spst#include "addrtoname.h" 45127668Sbms#include "extract.h" 4617680Spst 4717680Spst/* op code to string mapping */ 4817680Spststatic struct tok op2str[] = { 4917680Spst { RRQ, "RRQ" }, /* read request */ 5017680Spst { WRQ, "WRQ" }, /* write request */ 5117680Spst { DATA, "DATA" }, /* data packet */ 5217680Spst { ACK, "ACK" }, /* acknowledgement */ 5317680Spst { ERROR, "ERROR" }, /* error code */ 5417680Spst { 0, NULL } 5517680Spst}; 5617680Spst 5717680Spst/* error code to string mapping */ 5817680Spststatic struct tok err2str[] = { 5917680Spst { EUNDEF, "EUNDEF" }, /* not defined */ 6017680Spst { ENOTFOUND, "ENOTFOUND" }, /* file not found */ 6117680Spst { EACCESS, "EACCESS" }, /* access violation */ 6217680Spst { ENOSPACE, "ENOSPACE" }, /* disk full or allocation exceeded */ 6317680Spst { EBADOP, "EBADOP" }, /* illegal TFTP operation */ 6417680Spst { EBADID, "EBADID" }, /* unknown transfer ID */ 6517680Spst { EEXISTS, "EEXISTS" }, /* file already exists */ 6617680Spst { ENOUSER, "ENOUSER" }, /* no such user */ 6717680Spst { 0, NULL } 6817680Spst}; 6917680Spst 7017680Spst/* 7117680Spst * Print trivial file transfer program requests 7217680Spst */ 7317680Spstvoid 7417680Spsttftp_print(register const u_char *bp, u_int length) 7517680Spst{ 7617680Spst register const struct tftphdr *tp; 7717680Spst register const char *cp; 7817680Spst register const u_char *p; 7917680Spst register int opcode, i; 8017680Spst static char tstr[] = " [|tftp]"; 8117680Spst 8217680Spst tp = (const struct tftphdr *)bp; 8317680Spst 8417680Spst /* Print length */ 8517680Spst printf(" %d", length); 8617680Spst 8717680Spst /* Print tftp request type */ 8817680Spst TCHECK(tp->th_opcode); 89127668Sbms opcode = EXTRACT_16BITS(&tp->th_opcode); 9017680Spst cp = tok2str(op2str, "tftp-#%d", opcode); 9117680Spst printf(" %s", cp); 9217680Spst /* Bail if bogus opcode */ 9317680Spst if (*cp == 't') 9417680Spst return; 9517680Spst 9617680Spst switch (opcode) { 9717680Spst 9817680Spst case RRQ: 9917680Spst case WRQ: 10017680Spst /* 10117680Spst * XXX Not all arpa/tftp.h's specify th_stuff as any 10217680Spst * array; use address of th_block instead 10317680Spst */ 10417680Spst#ifdef notdef 10517680Spst p = (u_char *)tp->th_stuff; 10617680Spst#else 10717680Spst p = (u_char *)&tp->th_block; 10817680Spst#endif 10917680Spst fputs(" \"", stdout); 11017680Spst i = fn_print(p, snapend); 11117680Spst putchar('"'); 112127668Sbms 113127668Sbms /* Print the mode and any options */ 114127668Sbms while ((p = (const u_char *)strchr((const char *)p, '\0')) != NULL) { 115127668Sbms if (length <= (u_int)(p - (const u_char *)&tp->th_block)) 116127668Sbms break; 117127668Sbms p++; 118127668Sbms if (*p != '\0') { 119127668Sbms putchar(' '); 120127668Sbms fn_print(p, snapend); 121127668Sbms } 122127668Sbms } 123127668Sbms 12417680Spst if (i) 12517680Spst goto trunc; 12617680Spst break; 12717680Spst 12817680Spst case ACK: 12917680Spst case DATA: 13017680Spst TCHECK(tp->th_block); 131127668Sbms printf(" block %d", EXTRACT_16BITS(&tp->th_block)); 13217680Spst break; 13317680Spst 13417680Spst case ERROR: 13517680Spst /* Print error code string */ 13617680Spst TCHECK(tp->th_code); 13717680Spst printf(" %s ", tok2str(err2str, "tftp-err-#%d \"", 138127668Sbms EXTRACT_16BITS(&tp->th_code))); 13917680Spst /* Print error message string */ 14017680Spst i = fn_print((const u_char *)tp->th_data, snapend); 14117680Spst putchar('"'); 14217680Spst if (i) 14317680Spst goto trunc; 14417680Spst break; 14517680Spst 14617680Spst default: 14717680Spst /* We shouldn't get here */ 14817680Spst printf("(unknown #%d)", opcode); 14917680Spst break; 15017680Spst } 15117680Spst return; 15217680Spsttrunc: 15317680Spst fputs(tstr, stdout); 15417680Spst return; 15517680Spst} 156