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      1    0  stevel /*
      2    0  stevel  * CDDL HEADER START
      3    0  stevel  *
      4    0  stevel  * The contents of this file are subject to the terms of the
      5    0  stevel  * Common Development and Distribution License, Version 1.0 only
      6    0  stevel  * (the "License").  You may not use this file except in compliance
      7    0  stevel  * with the License.
      8    0  stevel  *
      9    0  stevel  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10    0  stevel  * or http://www.opensolaris.org/os/licensing.
     11    0  stevel  * See the License for the specific language governing permissions
     12    0  stevel  * and limitations under the License.
     13    0  stevel  *
     14    0  stevel  * When distributing Covered Code, include this CDDL HEADER in each
     15    0  stevel  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16    0  stevel  * If applicable, add the following below this CDDL HEADER, with the
     17    0  stevel  * fields enclosed by brackets "[]" replaced with your own identifying
     18    0  stevel  * information: Portions Copyright [yyyy] [name of copyright owner]
     19    0  stevel  *
     20    0  stevel  * CDDL HEADER END
     21    0  stevel  */
     22    0  stevel /*
     23  410  kcpoon  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
     24  410  kcpoon  * Use is subject to license terms.
     25    0  stevel  */
     26    0  stevel 
     27  410  kcpoon #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28    0  stevel 
     29    0  stevel #include <fcntl.h>
     30    0  stevel #include <arpa/tftp.h>
     31    0  stevel #include "snoop.h"
     32    0  stevel 
     33    0  stevel extern char *dlc_header;
     34    0  stevel char *tftperror();
     35    0  stevel char *show_type();
     36    0  stevel 
     37  410  kcpoon int
     38  410  kcpoon interpret_tftp(int flags, struct tftphdr *tftp, int fraglen)
     39    0  stevel {
     40    0  stevel 	char *name, *mode;
     41    0  stevel 	extern int src_port, dst_port;
     42    0  stevel 	int blocksize = fraglen - 4;
     43    0  stevel 
     44    0  stevel 	switch (ntohs(tftp->th_opcode)) {
     45    0  stevel 	case RRQ:
     46    0  stevel 	case WRQ:
     47    0  stevel 		add_transient(src_port, interpret_tftp);
     48    0  stevel 		break;
     49    0  stevel 	case ERROR:
     50    0  stevel 		del_transient(src_port);
     51    0  stevel 		break;
     52    0  stevel 	}
     53    0  stevel 
     54    0  stevel 	if (flags & F_SUM) {
     55    0  stevel 		switch (ntohs(tftp->th_opcode)) {
     56    0  stevel 		case RRQ:
     57  410  kcpoon 			name = (char *)&tftp->th_stuff;
     58    0  stevel 			mode = name + (strlen(name) + 1);
     59    0  stevel 			(void) sprintf(get_sum_line(),
     60    0  stevel 				"TFTP Read \"%s\" (%s)", name, mode);
     61    0  stevel 			break;
     62    0  stevel 		case WRQ:
     63  410  kcpoon 			name = (char *)&tftp->th_stuff;
     64    0  stevel 			mode = name + (strlen(name) + 1);
     65    0  stevel 			(void) sprintf(get_sum_line(),
     66    0  stevel 				"TFTP Write \"%s\" (%s)", name, mode);
     67    0  stevel 			break;
     68    0  stevel 		case DATA:
     69    0  stevel 			(void) sprintf(get_sum_line(),
     70    0  stevel 				"TFTP Data block %d (%d bytes)%s",
     71    0  stevel 				ntohs(tftp->th_block),
     72    0  stevel 				blocksize,
     73    0  stevel 				blocksize < 512 ? " (last block)":"");
     74    0  stevel 			break;
     75    0  stevel 		case ACK:
     76    0  stevel 			(void) sprintf(get_sum_line(),
     77    0  stevel 				"TFTP Ack  block %d",
     78    0  stevel 				ntohs(tftp->th_block));
     79    0  stevel 			break;
     80    0  stevel 		case ERROR:
     81    0  stevel 			(void) sprintf(get_sum_line(),
     82    0  stevel 				"TFTP Error: %s",
     83    0  stevel 				tftperror(ntohs(tftp->th_code)));
     84    0  stevel 			break;
     85    0  stevel 		}
     86    0  stevel 	}
     87    0  stevel 
     88    0  stevel 	if (flags & F_DTAIL) {
     89    0  stevel 
     90    0  stevel 	show_header("TFTP:  ", "Trivial File Transfer Protocol", fraglen);
     91    0  stevel 	show_space();
     92  410  kcpoon 	(void) sprintf(get_line((char *)(uintptr_t)tftp->th_opcode -
     93  410  kcpoon 		dlc_header, 2),
     94    0  stevel 		"Opcode = %d (%s)",
     95    0  stevel 		ntohs(tftp->th_opcode),
     96    0  stevel 		show_type(ntohs(tftp->th_opcode)));
     97    0  stevel 
     98    0  stevel 	switch (ntohs(tftp->th_opcode)) {
     99    0  stevel 	case RRQ:
    100    0  stevel 	case WRQ:
    101  410  kcpoon 		name = (char *)&tftp->th_stuff;
    102    0  stevel 		mode = name + (strlen(name) + 1);
    103    0  stevel 		(void) sprintf(
    104    0  stevel 			get_line(name - dlc_header, strlen(name) + 1),
    105    0  stevel 			"File name = \"%s\"",
    106    0  stevel 			name);
    107    0  stevel 		(void) sprintf(
    108    0  stevel 			get_line(mode - dlc_header, strlen(mode) + 1),
    109    0  stevel 			"Transfer mode = %s",
    110    0  stevel 			mode);
    111    0  stevel 		break;
    112    0  stevel 
    113    0  stevel 	case DATA:
    114    0  stevel 		(void) sprintf(
    115  410  kcpoon 			get_line((char *)(uintptr_t)tftp->th_block -
    116  410  kcpoon 			dlc_header, 2),	"Data block = %d%s",
    117    0  stevel 			ntohs(tftp->th_block),
    118    0  stevel 			blocksize < 512 ? " (last block)":"");
    119  410  kcpoon 		(void) sprintf(get_line((char *)(uintptr_t)tftp->th_data -
    120  410  kcpoon 			dlc_header, blocksize),
    121    0  stevel 			"[ %d bytes of data ]",
    122    0  stevel 			blocksize);
    123    0  stevel 		break;
    124    0  stevel 
    125    0  stevel 	case ACK:
    126  410  kcpoon 		(void) sprintf(get_line((char *)(uintptr_t)tftp->th_block -
    127  410  kcpoon 			dlc_header, 2),	"Acknowledge block = %d",
    128    0  stevel 			ntohs(tftp->th_block));
    129    0  stevel 		break;
    130    0  stevel 
    131    0  stevel 	case ERROR:
    132  410  kcpoon 		(void) sprintf(get_line((char *)(uintptr_t)tftp->th_code -
    133  410  kcpoon 			dlc_header, 2),	"Error = %d (%s)",
    134    0  stevel 			ntohs(tftp->th_code),
    135    0  stevel 			tftperror(ntohs(tftp->th_code)));
    136  410  kcpoon 		(void) sprintf(get_line((char *)(uintptr_t)tftp->th_data -
    137  410  kcpoon 			dlc_header, strlen(tftp->th_data) + 1),
    138  410  kcpoon 			"Error string = \"%s\"", tftp->th_data);
    139    0  stevel 	}
    140    0  stevel 	}
    141    0  stevel 
    142    0  stevel 	return (fraglen);
    143    0  stevel }
    144    0  stevel 
    145    0  stevel char *
    146    0  stevel show_type(t)
    147    0  stevel 	int t;
    148    0  stevel {
    149    0  stevel 	switch (t) {
    150    0  stevel 	case RRQ:	return ("read request");
    151    0  stevel 	case WRQ:	return ("write request");
    152    0  stevel 	case DATA:	return ("data packet");
    153    0  stevel 	case ACK:	return ("acknowledgement");
    154    0  stevel 	case ERROR:	return ("error");
    155    0  stevel 	}
    156    0  stevel 	return ("?");
    157    0  stevel }
    158    0  stevel 
    159    0  stevel char *
    160    0  stevel tftperror(code)
    161    0  stevel     unsigned short code;
    162    0  stevel {
    163    0  stevel 	static char buf[128];
    164    0  stevel 
    165    0  stevel 	switch (code) {
    166    0  stevel 	case EUNDEF:	return ("not defined");
    167    0  stevel 	case ENOTFOUND:	return ("file not found");
    168    0  stevel 	case EACCESS:	return ("access violation");
    169    0  stevel 	case ENOSPACE:	return ("disk full or allocation exceeded");
    170    0  stevel 	case EBADOP:	return ("illegal TFTP operation");
    171    0  stevel 	case EBADID:	return ("unknown transfer ID");
    172    0  stevel 	case EEXISTS:	return ("file already exists");
    173    0  stevel 	case ENOUSER:	return ("no such user");
    174    0  stevel 	}
    175    0  stevel 	(void) sprintf(buf, "%d", code);
    176    0  stevel 
    177    0  stevel 	return (buf);
    178    0  stevel }
    179