/* $OpenBSD: print-tftp.c,v 1.7 2000/10/03 14:31:58 ho Exp $ */ /* * 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[] = "@(#) $Header: /cvs/OpenBSD/src/usr.sbin/tcpdump/print-tftp.c,v 1.7 2000/10/03 14:31:58 ho Exp $ (LBL)"; #endif #include <sys/param.h> #include <sys/time.h> #include <netinet/in.h> #ifdef SEGSIZE #undef SEGSIZE /* SINIX sucks */ #endif #include <arpa/tftp.h> #include <ctype.h> #include <stdio.h> #include <string.h> #include "interface.h" #include "addrtoname.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 */ { ERROR, "ERROR" }, /* error code */ { 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 = ntohs(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: /* * 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 fputs(" \"", stdout); i = fn_print(p, snapend); putchar('"'); if (i) goto trunc; break; case ACK: case DATA: TCHECK(tp->th_block); printf(" block %d", ntohs(tp->th_block)); break; case ERROR: /* Print error code string */ TCHECK(tp->th_code); printf(" %s ", tok2str(err2str, "tftp-err-#%d \"", ntohs(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; }