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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <fcntl.h>
#include <arpa/tftp.h>
#include <stdio.h>
#include "snoop.h"
extern char *dlc_header;
char *tftperror();
char *show_type();
int
interpret_tftp(int flags, struct tftphdr *tftp, int fraglen)
{
char *name, *mode;
extern int src_port, dst_port;
int blocksize = fraglen - 4;
switch (ntohs(tftp->th_opcode)) {
case RRQ:
case WRQ:
add_transient(src_port, interpret_tftp);
break;
case ERROR:
del_transient(src_port);
break;
}
if (flags & F_SUM) {
switch (ntohs(tftp->th_opcode)) {
case RRQ:
name = (char *)&tftp->th_stuff;
mode = name + (strlen(name) + 1);
(void) sprintf(get_sum_line(),
"TFTP Read \"%s\" (%s)", name, mode);
break;
case WRQ:
name = (char *)&tftp->th_stuff;
mode = name + (strlen(name) + 1);
(void) sprintf(get_sum_line(),
"TFTP Write \"%s\" (%s)", name, mode);
break;
case DATA:
(void) sprintf(get_sum_line(),
"TFTP Data block %d (%d bytes)%s",
ntohs(tftp->th_block),
blocksize,
blocksize < 512 ? " (last block)":"");
break;
case ACK:
(void) sprintf(get_sum_line(),
"TFTP Ack block %d",
ntohs(tftp->th_block));
break;
case ERROR:
(void) sprintf(get_sum_line(),
"TFTP Error: %s",
tftperror(ntohs(tftp->th_code)));
break;
}
}
if (flags & F_DTAIL) {
show_header("TFTP: ", "Trivial File Transfer Protocol", fraglen);
show_space();
(void) sprintf(get_line((char *)(uintptr_t)tftp->th_opcode -
dlc_header, 2),
"Opcode = %d (%s)",
ntohs(tftp->th_opcode),
show_type(ntohs(tftp->th_opcode)));
switch (ntohs(tftp->th_opcode)) {
case RRQ:
case WRQ:
name = (char *)&tftp->th_stuff;
mode = name + (strlen(name) + 1);
(void) sprintf(
get_line(name - dlc_header, strlen(name) + 1),
"File name = \"%s\"",
name);
(void) sprintf(
get_line(mode - dlc_header, strlen(mode) + 1),
"Transfer mode = %s",
mode);
break;
case DATA:
(void) sprintf(
get_line((char *)(uintptr_t)tftp->th_block -
dlc_header, 2), "Data block = %d%s",
ntohs(tftp->th_block),
blocksize < 512 ? " (last block)":"");
(void) sprintf(get_line((char *)(uintptr_t)tftp->th_data -
dlc_header, blocksize),
"[ %d bytes of data ]",
blocksize);
break;
case ACK:
(void) sprintf(get_line((char *)(uintptr_t)tftp->th_block -
dlc_header, 2), "Acknowledge block = %d",
ntohs(tftp->th_block));
break;
case ERROR:
(void) sprintf(get_line((char *)(uintptr_t)tftp->th_code -
dlc_header, 2), "Error = %d (%s)",
ntohs(tftp->th_code),
tftperror(ntohs(tftp->th_code)));
(void) sprintf(get_line((char *)(uintptr_t)tftp->th_data -
dlc_header, strlen(tftp->th_data) + 1),
"Error string = \"%s\"", tftp->th_data);
}
}
return (fraglen);
}
char *
show_type(t)
int t;
{
switch (t) {
case RRQ: return ("read request");
case WRQ: return ("write request");
case DATA: return ("data packet");
case ACK: return ("acknowledgement");
case ERROR: return ("error");
}
return ("?");
}
char *
tftperror(code)
unsigned short code;
{
static char buf[128];
switch (code) {
case EUNDEF: return ("not defined");
case ENOTFOUND: return ("file not found");
case EACCESS: return ("access violation");
case ENOSPACE: return ("disk full or allocation exceeded");
case EBADOP: return ("illegal TFTP operation");
case EBADID: return ("unknown transfer ID");
case EEXISTS: return ("file already exists");
case ENOUSER: return ("no such user");
}
(void) sprintf(buf, "%d", code);
return (buf);
}
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