diff options
Diffstat (limited to 'contrib/tcpdump/print-tftp.c')
| -rw-r--r-- | contrib/tcpdump/print-tftp.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-tftp.c b/contrib/tcpdump/print-tftp.c new file mode 100644 index 0000000..c4fc7ea --- /dev/null +++ b/contrib/tcpdump/print-tftp.c @@ -0,0 +1,161 @@ +/* + * 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 1.38.2.1 2008-04-11 16:44:17 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: + /* + * XXX Not all arpa/tftp.h's specify th_stuff as any + * array; use address of th_block instead + */ +#ifdef notdef + p = (u_char *)tp->th_stuff; +#else + p = (u_char *)&tp->th_block; +#endif + 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; +} |
