1999-02-12 09:03:42 +00:00
|
|
|
/* packet-http.c
|
|
|
|
* Routines for HTTP packet disassembly
|
|
|
|
*
|
|
|
|
* Guy Harris <guy@netapp.com>
|
|
|
|
*
|
1999-03-30 04:41:01 +00:00
|
|
|
* $Id: packet-http.c,v 1.3 1999/03/30 04:41:01 guy Exp $
|
1999-02-12 09:03:42 +00:00
|
|
|
*
|
|
|
|
* Ethereal - Network traffic analyzer
|
|
|
|
* By Gerald Combs <gerald@zing.org>
|
|
|
|
* Copyright 1998 Gerald Combs
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* as published by the Free Software Foundation; either version 2
|
|
|
|
* of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "config.h"
|
|
|
|
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
|
|
#include <sys/types.h>
|
|
|
|
#endif
|
|
|
|
|
1999-03-23 03:14:46 +00:00
|
|
|
#include <string.h>
|
|
|
|
#include <ctype.h>
|
1999-02-12 09:03:42 +00:00
|
|
|
|
1999-03-23 03:14:46 +00:00
|
|
|
#include <glib.h>
|
1999-02-12 09:03:42 +00:00
|
|
|
#include "packet.h"
|
|
|
|
|
|
|
|
static int is_http_request_or_reply(const u_char *data, int linelen);
|
|
|
|
|
1999-03-23 03:14:46 +00:00
|
|
|
void dissect_http(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
|
1999-02-12 09:03:42 +00:00
|
|
|
{
|
1999-03-23 03:14:46 +00:00
|
|
|
proto_tree *http_tree;
|
|
|
|
proto_item *ti;
|
1999-02-12 09:03:42 +00:00
|
|
|
const u_char *data, *dataend;
|
1999-03-30 04:41:01 +00:00
|
|
|
const u_char *linep, *lineend, *eol;
|
1999-02-12 09:03:42 +00:00
|
|
|
int linelen;
|
|
|
|
u_char c;
|
|
|
|
|
|
|
|
data = &pd[offset];
|
|
|
|
dataend = data + END_OF_FRAME;
|
|
|
|
|
|
|
|
if (check_col(fd, COL_PROTOCOL))
|
|
|
|
col_add_str(fd, COL_PROTOCOL, "HTTP");
|
|
|
|
if (check_col(fd, COL_INFO)) {
|
|
|
|
/*
|
|
|
|
* Put the first line from the buffer into the summary,
|
|
|
|
* if it's an HTTP request or reply.
|
|
|
|
* Otherwise, just call it a continuation.
|
|
|
|
*/
|
1999-03-30 04:41:01 +00:00
|
|
|
lineend = find_line_end(data, dataend, &eol);
|
1999-02-12 09:03:42 +00:00
|
|
|
linelen = lineend - data;
|
|
|
|
if (is_http_request_or_reply(data, linelen))
|
1999-03-30 04:41:01 +00:00
|
|
|
col_add_str(fd, COL_INFO, format_text(data, linelen));
|
1999-02-12 09:03:42 +00:00
|
|
|
else
|
|
|
|
col_add_str(fd, COL_INFO, "Continuation");
|
|
|
|
}
|
|
|
|
|
|
|
|
if (tree) {
|
1999-03-23 03:14:46 +00:00
|
|
|
ti = proto_tree_add_item(tree, offset, END_OF_FRAME,
|
1999-02-12 09:03:42 +00:00
|
|
|
"Hypertext Transfer Protocol");
|
1999-03-23 03:14:46 +00:00
|
|
|
http_tree = proto_tree_new();
|
|
|
|
proto_item_add_subtree(ti, http_tree, ETT_HTTP);
|
1999-02-12 09:03:42 +00:00
|
|
|
|
|
|
|
while (data < dataend) {
|
|
|
|
/*
|
|
|
|
* Find the end of the line.
|
|
|
|
*/
|
1999-03-30 04:41:01 +00:00
|
|
|
lineend = find_line_end(data, dataend, &eol);
|
1999-02-12 09:03:42 +00:00
|
|
|
linelen = lineend - data;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* OK, does it look like an HTTP request or
|
|
|
|
* response?
|
|
|
|
*/
|
|
|
|
if (is_http_request_or_reply(data, linelen))
|
|
|
|
goto is_http;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* No. Does it look like a blank line (as would
|
|
|
|
* appear at the end of an HTTP request)?
|
|
|
|
*/
|
|
|
|
if (linelen == 1) {
|
|
|
|
if (*data == '\n')
|
|
|
|
goto is_http;
|
|
|
|
}
|
|
|
|
if (linelen == 2) {
|
|
|
|
if (strncmp(data, "\r\n", 2) == 0 ||
|
|
|
|
strncmp(data, "\n\r", 2) == 0)
|
|
|
|
goto is_http;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* No. Does it look like a MIME header?
|
|
|
|
*/
|
|
|
|
linep = data;
|
|
|
|
while (linep < lineend) {
|
|
|
|
c = *linep++;
|
|
|
|
if (!isprint(c))
|
|
|
|
break; /* not printable, not a MIME header */
|
|
|
|
switch (c) {
|
|
|
|
|
|
|
|
case '(':
|
|
|
|
case ')':
|
|
|
|
case '<':
|
|
|
|
case '>':
|
|
|
|
case '@':
|
|
|
|
case ',':
|
|
|
|
case ';':
|
|
|
|
case '\\':
|
|
|
|
case '"':
|
|
|
|
case '/':
|
|
|
|
case '[':
|
|
|
|
case ']':
|
|
|
|
case '?':
|
|
|
|
case '=':
|
|
|
|
case '{':
|
|
|
|
case '}':
|
|
|
|
/*
|
|
|
|
* It's a tspecial, so it's not
|
|
|
|
* part of a token, so it's not
|
|
|
|
* a field name for the beginning
|
|
|
|
* of a MIME header.
|
|
|
|
*/
|
|
|
|
goto not_http;
|
|
|
|
|
|
|
|
case ':':
|
|
|
|
/*
|
|
|
|
* This ends the token; we consider
|
|
|
|
* this to be a MIME header.
|
|
|
|
*/
|
|
|
|
goto is_http;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
not_http:
|
|
|
|
/*
|
|
|
|
* We don't consider this part of an HTTP request or
|
|
|
|
* reply, so we don't display it.
|
|
|
|
* (Yeah, that means we don't display, say, a
|
|
|
|
* text/http page, but you can get that from the
|
|
|
|
* data pane.)
|
|
|
|
*/
|
|
|
|
break;
|
|
|
|
|
|
|
|
is_http:
|
|
|
|
/*
|
|
|
|
* Put this line.
|
|
|
|
*/
|
1999-03-23 03:14:46 +00:00
|
|
|
proto_tree_add_item(http_tree, offset, linelen, "%s",
|
1999-03-30 04:41:01 +00:00
|
|
|
format_text(data, linelen));
|
1999-02-12 09:03:42 +00:00
|
|
|
offset += linelen;
|
|
|
|
data = lineend;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (data < dataend) {
|
1999-03-23 03:14:46 +00:00
|
|
|
proto_tree_add_item(http_tree, offset, END_OF_FRAME,
|
1999-02-12 09:03:42 +00:00
|
|
|
"Data (%d bytes)", END_OF_FRAME);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* XXX - this won't handle HTTP 0.9 replies, but they're all data
|
|
|
|
* anyway.
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
is_http_request_or_reply(const u_char *data, int linelen)
|
|
|
|
{
|
|
|
|
if (linelen >= 3) {
|
|
|
|
if (strncasecmp(data, "GET", 3) == 0 ||
|
|
|
|
strncasecmp(data, "PUT", 3) == 0)
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
if (linelen >= 4) {
|
|
|
|
if (strncasecmp(data, "HEAD", 4) == 0 ||
|
|
|
|
strncasecmp(data, "POST", 4) == 0)
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
if (linelen >= 5) {
|
|
|
|
if (strncasecmp(data, "TRACE", 5) == 0)
|
|
|
|
return TRUE;
|
|
|
|
if (strncasecmp(data, "HTTP/", 5) == 0)
|
|
|
|
return TRUE; /* response */
|
|
|
|
}
|
|
|
|
if (linelen >= 6) {
|
|
|
|
if (strncasecmp(data, "DELETE", 6) == 0)
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
if (linelen >= 7) {
|
|
|
|
if (strncasecmp(data, "OPTIONS", 7) == 0)
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
return FALSE;
|
|
|
|
}
|