print-tftp.c revision 172683
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_ = 26172683Smlaier "@(#) $Header: /tcpdump/master/tcpdump/print-tftp.c,v 1.37.2.1 2007/09/14 01:03:12 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 3917680Spst#include <stdio.h> 4017680Spst#include <string.h> 4117680Spst 4217680Spst#include "interface.h" 4317680Spst#include "addrtoname.h" 44127668Sbms#include "extract.h" 45172683Smlaier#include "tftp.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 */ 54172683Smlaier { OACK, "OACK" }, /* option acknowledgement */ 5517680Spst { 0, NULL } 5617680Spst}; 5717680Spst 5817680Spst/* error code to string mapping */ 5917680Spststatic struct tok err2str[] = { 6017680Spst { EUNDEF, "EUNDEF" }, /* not defined */ 6117680Spst { ENOTFOUND, "ENOTFOUND" }, /* file not found */ 6217680Spst { EACCESS, "EACCESS" }, /* access violation */ 6317680Spst { ENOSPACE, "ENOSPACE" }, /* disk full or allocation exceeded */ 6417680Spst { EBADOP, "EBADOP" }, /* illegal TFTP operation */ 6517680Spst { EBADID, "EBADID" }, /* unknown transfer ID */ 6617680Spst { EEXISTS, "EEXISTS" }, /* file already exists */ 6717680Spst { ENOUSER, "ENOUSER" }, /* no such user */ 6817680Spst { 0, NULL } 6917680Spst}; 7017680Spst 7117680Spst/* 7217680Spst * Print trivial file transfer program requests 7317680Spst */ 7417680Spstvoid 7517680Spsttftp_print(register const u_char *bp, u_int length) 7617680Spst{ 7717680Spst register const struct tftphdr *tp; 7817680Spst register const char *cp; 7917680Spst register const u_char *p; 8017680Spst register int opcode, i; 8117680Spst static char tstr[] = " [|tftp]"; 8217680Spst 8317680Spst tp = (const struct tftphdr *)bp; 8417680Spst 8517680Spst /* Print length */ 8617680Spst printf(" %d", length); 8717680Spst 8817680Spst /* Print tftp request type */ 8917680Spst TCHECK(tp->th_opcode); 90127668Sbms opcode = EXTRACT_16BITS(&tp->th_opcode); 9117680Spst cp = tok2str(op2str, "tftp-#%d", opcode); 9217680Spst printf(" %s", cp); 9317680Spst /* Bail if bogus opcode */ 9417680Spst if (*cp == 't') 9517680Spst return; 9617680Spst 9717680Spst switch (opcode) { 9817680Spst 9917680Spst case RRQ: 10017680Spst case WRQ: 101172683Smlaier case OACK: 10217680Spst /* 10317680Spst * XXX Not all arpa/tftp.h's specify th_stuff as any 10417680Spst * array; use address of th_block instead 10517680Spst */ 10617680Spst#ifdef notdef 10717680Spst p = (u_char *)tp->th_stuff; 10817680Spst#else 10917680Spst p = (u_char *)&tp->th_block; 11017680Spst#endif 111172683Smlaier putchar(' '); 112172683Smlaier /* Print filename or first option */ 113172683Smlaier if (opcode != OACK) 114172683Smlaier putchar('"'); 11517680Spst i = fn_print(p, snapend); 116172683Smlaier if (opcode != OACK) 117172683Smlaier putchar('"'); 118127668Sbms 119172683Smlaier /* Print the mode (RRQ and WRQ only) and any options */ 120127668Sbms while ((p = (const u_char *)strchr((const char *)p, '\0')) != NULL) { 121127668Sbms if (length <= (u_int)(p - (const u_char *)&tp->th_block)) 122127668Sbms break; 123127668Sbms p++; 124127668Sbms if (*p != '\0') { 125127668Sbms putchar(' '); 126127668Sbms fn_print(p, snapend); 127127668Sbms } 128127668Sbms } 129127668Sbms 13017680Spst if (i) 13117680Spst goto trunc; 13217680Spst break; 13317680Spst 13417680Spst case ACK: 13517680Spst case DATA: 13617680Spst TCHECK(tp->th_block); 137127668Sbms printf(" block %d", EXTRACT_16BITS(&tp->th_block)); 13817680Spst break; 13917680Spst 14017680Spst case ERROR: 14117680Spst /* Print error code string */ 14217680Spst TCHECK(tp->th_code); 143172683Smlaier printf(" %s \"", tok2str(err2str, "tftp-err-#%d \"", 144127668Sbms EXTRACT_16BITS(&tp->th_code))); 14517680Spst /* Print error message string */ 14617680Spst i = fn_print((const u_char *)tp->th_data, snapend); 14717680Spst putchar('"'); 14817680Spst if (i) 14917680Spst goto trunc; 15017680Spst break; 15117680Spst 15217680Spst default: 15317680Spst /* We shouldn't get here */ 15417680Spst printf("(unknown #%d)", opcode); 15517680Spst break; 15617680Spst } 15717680Spst return; 15817680Spsttrunc: 15917680Spst fputs(tstr, stdout); 16017680Spst return; 16117680Spst} 162