1999-02-12 09:03:42 +00:00
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/* packet-http.c
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* Routines for HTTP packet disassembly
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*
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2000-01-22 06:22:44 +00:00
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* Guy Harris <guy@alum.mit.edu>
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1999-02-12 09:03:42 +00:00
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*
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2000-09-30 05:37:07 +00:00
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* $Id: packet-http.c,v 1.23 2000/09/30 05:37:07 guy Exp $
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1999-02-12 09:03:42 +00:00
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*
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*/
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1999-07-13 02:53:26 +00:00
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#ifdef HAVE_CONFIG_H
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1999-02-12 09:03:42 +00:00
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#include "config.h"
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1999-07-13 02:53:26 +00:00
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#endif
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1999-02-12 09:03:42 +00:00
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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1999-03-23 03:14:46 +00:00
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#include <string.h>
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#include <ctype.h>
|
1999-02-12 09:03:42 +00:00
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1999-03-23 03:14:46 +00:00
|
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|
#include <glib.h>
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1999-02-12 09:03:42 +00:00
|
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|
#include "packet.h"
|
2000-02-15 21:06:58 +00:00
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|
#include "packet-ipp.h"
|
2000-09-11 16:16:13 +00:00
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|
#include "strutil.h"
|
1999-02-12 09:03:42 +00:00
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|
2000-02-23 19:47:14 +00:00
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typedef enum _http_type {
|
2000-02-23 20:55:33 +00:00
|
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HTTP_REQUEST,
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HTTP_RESPONSE,
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HTTP_OTHERS
|
2000-02-23 19:47:14 +00:00
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} http_type_t;
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1999-07-29 05:47:07 +00:00
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static int proto_http = -1;
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1999-10-16 20:30:14 +00:00
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static int hf_http_response = -1;
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static int hf_http_request = -1;
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1999-11-16 11:44:20 +00:00
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static gint ett_http = -1;
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2000-04-08 07:07:42 +00:00
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#define TCP_PORT_HTTP 80
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#define TCP_PORT_PROXY_HTTP 3128
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#define TCP_PORT_PROXY_ADMIN_HTTP 3132
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#define TCP_ALT_PORT_HTTP 8080
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|
2000-02-23 19:47:14 +00:00
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static int is_http_request_or_reply(const u_char *data, int linelen, http_type_t *type);
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1999-02-12 09:03:42 +00:00
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|
1999-03-23 03:14:46 +00:00
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|
void dissect_http(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
|
1999-02-12 09:03:42 +00:00
|
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|
{
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1999-09-17 05:56:58 +00:00
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|
gboolean is_ipp = (pi.srcport == 631 || pi.destport == 631);
|
1999-03-23 03:14:46 +00:00
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proto_item *ti;
|
2000-02-23 20:55:33 +00:00
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proto_tree *http_tree;
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1999-02-12 09:03:42 +00:00
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const u_char *data, *dataend;
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1999-03-30 04:41:01 +00:00
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const u_char *linep, *lineend, *eol;
|
1999-02-12 09:03:42 +00:00
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int linelen;
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u_char c;
|
2000-02-23 19:47:14 +00:00
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http_type_t http_type = HTTP_OTHERS;
|
1999-02-12 09:03:42 +00:00
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|
Add the "Edit:Protocols..." feature which currently only implements
the following:
It is now possible to enable/disable a particular protocol decoding
(i.e. the protocol dissector is void or not). When a protocol
is disabled, it is displayed as Data and of course, all linked
sub-protocols are disabled as well.
Disabling a protocol could be interesting:
- in case of buggy dissectors
- in case of wrong heuristics
- for performance reasons
- to decode the data as another protocol (TODO)
Currently (if I am not wrong), all dissectors but NFS can be disabled
(and dissectors that do not register protocols :-)
I do not like the way the RPC sub-dissectors are disabled (in the
sub-dissectors) since this could be done in the RPC dissector itself,
knowing the sub-protocol hfinfo entry (this is why, I've not modified
the NFS one yet).
Two functions are added in proto.c :
gboolean proto_is_protocol_enabled(int n);
void proto_set_decoding(int n, gboolean enabled);
and two MACROs which can be used in dissectors:
OLD_CHECK_DISPLAY_AS_DATA(index, pd, offset, fd, tree)
CHECK_DISPLAY_AS_DATA(index, tvb, pinfo, tree)
See also the XXX in proto_dlg.c and proto.c around the new functions.
svn path=/trunk/; revision=2267
2000-08-13 14:09:15 +00:00
|
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|
OLD_CHECK_DISPLAY_AS_DATA(proto_http, pd, offset, fd, tree);
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|
1999-02-12 09:03:42 +00:00
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|
data = &pd[offset];
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dataend = data + END_OF_FRAME;
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|
|
if (check_col(fd, COL_PROTOCOL))
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1999-09-17 05:56:58 +00:00
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col_add_str(fd, COL_PROTOCOL, is_ipp ? "IPP" : "HTTP");
|
1999-02-12 09:03:42 +00:00
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|
if (check_col(fd, COL_INFO)) {
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/*
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|
* Put the first line from the buffer into the summary,
|
2000-09-30 05:37:07 +00:00
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|
* if it's an HTTP request or reply (but leave out the
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|
* "\r\n", or whatever, at the end).
|
1999-02-12 09:03:42 +00:00
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|
* Otherwise, just call it a continuation.
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|
|
*/
|
1999-03-30 04:41:01 +00:00
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|
lineend = find_line_end(data, dataend, &eol);
|
2000-09-30 05:37:07 +00:00
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|
linelen = eol - data;
|
2000-02-23 19:47:14 +00:00
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|
if (is_http_request_or_reply(data, linelen, &http_type))
|
1999-03-30 04:41:01 +00:00
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|
col_add_str(fd, COL_INFO, format_text(data, linelen));
|
1999-02-12 09:03:42 +00:00
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|
else
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col_add_str(fd, COL_INFO, "Continuation");
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|
}
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if (tree) {
|
2000-05-31 05:09:07 +00:00
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|
ti = proto_tree_add_item(tree, proto_http, NullTVB, offset, END_OF_FRAME, FALSE);
|
1999-11-16 11:44:20 +00:00
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|
http_tree = proto_item_add_subtree(ti, ett_http);
|
1999-02-12 09:03:42 +00:00
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|
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|
while (data < dataend) {
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/*
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* Find the end of the line.
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*/
|
1999-03-30 04:41:01 +00:00
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lineend = find_line_end(data, dataend, &eol);
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1999-02-12 09:03:42 +00:00
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|
linelen = lineend - data;
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/*
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* OK, does it look like an HTTP request or
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* response?
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*/
|
2000-02-23 19:47:14 +00:00
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if (is_http_request_or_reply(data, linelen, &http_type))
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1999-02-12 09:03:42 +00:00
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goto is_http;
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/*
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* No. Does it look like a blank line (as would
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* appear at the end of an HTTP request)?
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*/
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if (linelen == 1) {
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if (*data == '\n')
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goto is_http;
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}
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if (linelen == 2) {
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if (strncmp(data, "\r\n", 2) == 0 ||
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strncmp(data, "\n\r", 2) == 0)
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goto is_http;
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}
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/*
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* No. Does it look like a MIME header?
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*/
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linep = data;
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while (linep < lineend) {
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c = *linep++;
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if (!isprint(c))
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break; /* not printable, not a MIME header */
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switch (c) {
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case '(':
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case ')':
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case '<':
|
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case '>':
|
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|
case '@':
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case ',':
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case ';':
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case '\\':
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case '"':
|
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case '/':
|
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case '[':
|
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|
case ']':
|
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case '?':
|
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|
case '=':
|
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|
|
case '{':
|
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|
case '}':
|
|
|
|
/*
|
|
|
|
* It's a tspecial, so it's not
|
|
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|
* part of a token, so it's not
|
|
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* a field name for the beginning
|
|
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|
* of a MIME header.
|
|
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|
*/
|
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goto not_http;
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|
case ':':
|
|
|
|
/*
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|
|
|
* This ends the token; we consider
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|
|
|
* this to be a MIME header.
|
|
|
|
*/
|
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|
|
goto is_http;
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|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
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|
not_http:
|
|
|
|
/*
|
|
|
|
* We don't consider this part of an HTTP request or
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|
|
|
* 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:
|
|
|
|
/*
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|
|
|
* Put this line.
|
|
|
|
*/
|
2000-05-11 08:18:09 +00:00
|
|
|
proto_tree_add_text(http_tree, NullTVB, 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;
|
|
|
|
}
|
|
|
|
|
2000-02-23 19:47:14 +00:00
|
|
|
switch (http_type) {
|
2000-02-23 20:55:33 +00:00
|
|
|
|
|
|
|
case HTTP_RESPONSE:
|
2000-05-31 05:09:07 +00:00
|
|
|
proto_tree_add_boolean_hidden(http_tree,
|
2000-05-11 08:18:09 +00:00
|
|
|
hf_http_response, NullTVB, 0, 0, 1);
|
2000-02-23 20:55:33 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case HTTP_REQUEST:
|
2000-05-31 05:09:07 +00:00
|
|
|
proto_tree_add_boolean_hidden(http_tree,
|
2000-05-11 08:18:09 +00:00
|
|
|
hf_http_request, NullTVB, 0, 0, 1);
|
2000-02-23 20:55:33 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case HTTP_OTHERS:
|
|
|
|
default:
|
|
|
|
break;
|
2000-02-23 19:47:14 +00:00
|
|
|
}
|
|
|
|
|
1999-09-17 05:56:58 +00:00
|
|
|
if (data < dataend) {
|
|
|
|
if (is_ipp)
|
|
|
|
dissect_ipp(pd, offset, fd, tree);
|
|
|
|
else
|
Allow either old-style (pre-tvbuff) or new-style (tvbuffified)
dissectors to be registered as dissectors for particular ports,
registered as heuristic dissectors, and registered as dissectors for
conversations, and have routines to be used both by old-style and
new-style dissectors to call registered dissectors.
Have the code that calls those dissectors translate the arguments as
necessary. (For conversation dissectors, replace
"find_conversation_dissector()", which just returns a pointer to the
dissector, with "old_try_conversation_dissector()" and
"try_conversation_dissector()", which actually call the dissector, so
that there's a single place at which we can do that translation. Also
make "dissector_lookup()" static and, instead of calling it and, if it
returns a non-null pointer, calling that dissector, just use
"old_dissector_try_port()" or "dissector_try_port()", for the same
reason.)
This allows some dissectors that took old-style arguments and
immediately translated them to new-style arguments to just take
new-style arguments; make them do so. It also allows some new-style
dissectors not to have to translate arguments before calling routines to
look up and call dissectors; make them not do so.
Get rid of checks for too-short frames in new-style dissectors - the
tvbuff code does those checks for you.
Give the routines to register old-style dissectors, and to call
dissectors from old-style dissectors, names beginning with "old_", with
the routines for new-style dissectors not having the "old_". Update the
dissectors that use those routines appropriately.
Rename "dissect_data()" to "old_dissect_data()", and
"dissect_data_tvb()" to "dissect_data()".
svn path=/trunk/; revision=2218
2000-08-07 03:21:25 +00:00
|
|
|
old_dissect_data(&pd[offset], offset, fd, http_tree);
|
1999-09-17 05:56:58 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* XXX - this won't handle HTTP 0.9 replies, but they're all data
|
|
|
|
* anyway.
|
|
|
|
*/
|
|
|
|
static int
|
2000-02-23 19:47:14 +00:00
|
|
|
is_http_request_or_reply(const u_char *data, int linelen, http_type_t *type)
|
1999-02-12 09:03:42 +00:00
|
|
|
{
|
|
|
|
if (linelen >= 3) {
|
|
|
|
if (strncasecmp(data, "GET", 3) == 0 ||
|
1999-10-16 20:30:14 +00:00
|
|
|
strncasecmp(data, "PUT", 3) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-10-16 20:30:14 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
if (linelen >= 4) {
|
|
|
|
if (strncasecmp(data, "HEAD", 4) == 0 ||
|
1999-10-16 20:30:14 +00:00
|
|
|
strncasecmp(data, "POST", 4) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-10-16 20:30:14 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
if (linelen >= 5) {
|
|
|
|
if (strncasecmp(data, "TRACE", 5) == 0)
|
|
|
|
return TRUE;
|
1999-10-16 20:30:14 +00:00
|
|
|
if (strncasecmp(data, "HTTP/", 5) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_RESPONSE;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE; /* response */
|
1999-10-16 20:30:14 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
if (linelen >= 6) {
|
1999-12-06 20:27:40 +00:00
|
|
|
if (strncasecmp(data, "DELETE", 6) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-12-06 20:27:40 +00:00
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (linelen >= 7) {
|
|
|
|
if (strncasecmp(data, "OPTIONS", 7) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-12-06 20:27:40 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
if (linelen >= 7) {
|
1999-12-06 20:27:40 +00:00
|
|
|
if (strncasecmp(data, "CONNECT", 7) == 0) {
|
2000-02-23 20:55:33 +00:00
|
|
|
if (*type == HTTP_OTHERS)
|
|
|
|
*type = HTTP_REQUEST;
|
1999-02-12 09:03:42 +00:00
|
|
|
return TRUE;
|
1999-12-06 20:27:40 +00:00
|
|
|
}
|
1999-02-12 09:03:42 +00:00
|
|
|
}
|
|
|
|
return FALSE;
|
|
|
|
}
|
1999-07-29 05:47:07 +00:00
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_http(void)
|
|
|
|
{
|
|
|
|
|
1999-10-16 20:30:14 +00:00
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_http_response,
|
|
|
|
{ "Response", "http.response",
|
|
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
|
|
"TRUE if HTTP response" }},
|
|
|
|
{ &hf_http_request,
|
|
|
|
{ "Request", "http.request",
|
|
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
2000-02-23 19:47:14 +00:00
|
|
|
"TRUE if HTTP request" }},
|
1999-10-16 20:30:14 +00:00
|
|
|
};
|
1999-11-16 11:44:20 +00:00
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_http,
|
|
|
|
};
|
1999-10-16 20:30:14 +00:00
|
|
|
|
|
|
|
proto_http = proto_register_protocol("Hypertext Transfer Protocol", "http");
|
|
|
|
proto_register_field_array(proto_http, hf, array_length(hf));
|
1999-11-16 11:44:20 +00:00
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
1999-07-29 05:47:07 +00:00
|
|
|
}
|
2000-04-08 07:07:42 +00:00
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_http(void)
|
|
|
|
{
|
Allow either old-style (pre-tvbuff) or new-style (tvbuffified)
dissectors to be registered as dissectors for particular ports,
registered as heuristic dissectors, and registered as dissectors for
conversations, and have routines to be used both by old-style and
new-style dissectors to call registered dissectors.
Have the code that calls those dissectors translate the arguments as
necessary. (For conversation dissectors, replace
"find_conversation_dissector()", which just returns a pointer to the
dissector, with "old_try_conversation_dissector()" and
"try_conversation_dissector()", which actually call the dissector, so
that there's a single place at which we can do that translation. Also
make "dissector_lookup()" static and, instead of calling it and, if it
returns a non-null pointer, calling that dissector, just use
"old_dissector_try_port()" or "dissector_try_port()", for the same
reason.)
This allows some dissectors that took old-style arguments and
immediately translated them to new-style arguments to just take
new-style arguments; make them do so. It also allows some new-style
dissectors not to have to translate arguments before calling routines to
look up and call dissectors; make them not do so.
Get rid of checks for too-short frames in new-style dissectors - the
tvbuff code does those checks for you.
Give the routines to register old-style dissectors, and to call
dissectors from old-style dissectors, names beginning with "old_", with
the routines for new-style dissectors not having the "old_". Update the
dissectors that use those routines appropriately.
Rename "dissect_data()" to "old_dissect_data()", and
"dissect_data_tvb()" to "dissect_data()".
svn path=/trunk/; revision=2218
2000-08-07 03:21:25 +00:00
|
|
|
old_dissector_add("tcp.port", TCP_PORT_HTTP, dissect_http);
|
|
|
|
old_dissector_add("tcp.port", TCP_ALT_PORT_HTTP, dissect_http);
|
|
|
|
old_dissector_add("tcp.port", TCP_PORT_PROXY_HTTP, dissect_http);
|
|
|
|
old_dissector_add("tcp.port", TCP_PORT_PROXY_ADMIN_HTTP, dissect_http);
|
2000-04-08 07:07:42 +00:00
|
|
|
}
|